JPH0214599B2 - - Google Patents
Info
- Publication number
- JPH0214599B2 JPH0214599B2 JP14893379A JP14893379A JPH0214599B2 JP H0214599 B2 JPH0214599 B2 JP H0214599B2 JP 14893379 A JP14893379 A JP 14893379A JP 14893379 A JP14893379 A JP 14893379A JP H0214599 B2 JPH0214599 B2 JP H0214599B2
- Authority
- JP
- Japan
- Prior art keywords
- lpg
- flow rate
- valve
- control valve
- evaporator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000000446 fuel Substances 0.000 claims description 76
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 63
- 239000007788 liquid Substances 0.000 claims description 49
- 239000003915 liquefied petroleum gas Substances 0.000 description 115
- 238000010586 diagram Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- GWTYBAOENKSFAY-UHFFFAOYSA-N 1,1,1,2,2-pentafluoro-2-(1,2,2-trifluoroethenoxy)ethane Chemical compound FC(F)=C(F)OC(F)(F)C(F)(F)F GWTYBAOENKSFAY-UHFFFAOYSA-N 0.000 description 1
- 238000012369 In process control Methods 0.000 description 1
- 238000010965 in-process control Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
- F17C13/028—Special adaptations of indicating, measuring, or monitoring equipment having the volume as the parameter
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/03—Mixtures
- F17C2221/032—Hydrocarbons
- F17C2221/035—Propane butane, e.g. LPG, GPL
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0146—Two-phase
- F17C2223/0153—Liquefied gas, e.g. LPG, GPL
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/06—Controlling or regulating of parameters as output values
- F17C2250/0605—Parameters
- F17C2250/0621—Volume
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Feeding And Controlling Fuel (AREA)
- Feedback Control In General (AREA)
Description
【発明の詳細な説明】
本発明は、LPG（液化石油ガス）燃料供給プラ
ント制御装置に係り、特に火力プラント用ボイラ
に燃料を供給するに好適なLPG燃料供給プラン
トの制御装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an LPG (liquefied petroleum gas) fuel supply plant control device, and particularly to a control device for an LPG fuel supply plant suitable for supplying fuel to a boiler for a thermal power plant.
LPG燃料供給プラントは、第１図に示すよう
に、LPG液タンク１、LPG液ポンプ２、エバポ
レータ３、リボイラ４、スーパ・ヒータ５、温水
ポンプ６から構成されている。次に、LPG燃料
供給プラントの動作を説明する。 The LPG fuel supply plant is comprised of an LPG liquid tank 1, an LPG liquid pump 2, an evaporator 3, a reboiler 4, a super heater 5, and a hot water pump 6, as shown in FIG. Next, the operation of the LPG fuel supply plant will be explained.
LPG液は、LPG液タンク１からLPG液ポンプ
を通してエバポレータ３へ送られる。エバポレー
タ３内のLPG液は、エバポレータ３の底部から
リボイラ４に入り、リボイラ４で温水により温め
られ、LPG蒸気液混相液となり、エバポレータ
４に戻る。エバポレータ３に戻つたLPG蒸気・
液混相液のうちLPG蒸気の一部は、スーパ・ヒ
ータ５に送られ、スーパ・ヒータ５で温水により
過熱され、LPG過熱蒸気となり、配管を通して
火力プラント用ボイラへ送られる。 The LPG liquid is sent from the LPG liquid tank 1 to the evaporator 3 through the LPG liquid pump. The LPG liquid in the evaporator 3 enters the reboiler 4 from the bottom of the evaporator 3, is heated by hot water in the reboiler 4, becomes an LPG vapor-liquid mixed phase liquid, and returns to the evaporator 4. LPG steam returned to evaporator 3.
A portion of the LPG vapor in the liquid multiphase liquid is sent to the super heater 5, where it is superheated with hot water, becomes LPG superheated vapor, and is sent to the thermal power plant boiler through piping.
上記のLPG燃料供給プラントを制御するのに、
従来例として、第２図に示すLPG燃料供給プラ
ント制御装置がある。次に、このLPG燃料供給
プラント制御装置の動作を説明する。 To control the above LPG fuel supply plant,
As a conventional example, there is an LPG fuel supply plant control device shown in FIG. Next, the operation of this LPG fuel supply plant control device will be explained.
減算器１０１は、エバポレータ３のLPG液レ
ベル設定値LEVRとLPG液レベルとの偏差LEVEを計
算する。比例・積分器１０２は、偏差LEVEに基づ
いてエバポレータ出口LPG蒸気流量修正信号
FCV3Mを計算する。加算器１０３は、エバポレー
タ出口LPG蒸気流量FCV3とエバポレータ出口
LPG蒸気流量修正信号FCV3Mを加算し、エバポレ
ータ入口LPG液流量デマンド信号FCV1Dを計算す
る。減算器１０４は、エバポレータ入口LPG液
流量デマンド信号FCV1Dとエバポレータ入口LPG
液流量FCV1との偏差FCV1Eを計算する。比例・積
分器１０５は、偏差FCV1Eに基づいてエバポレー
タ入口LPG液流量調節弁CV１操作信号MCV1を計
算し、エバポレータ入口LPG液流量調節弁CV１
を操作する。 The subtractor 101 calculates the deviation L EVE between the LPG liquid level setting value L EVR of the evaporator 3 and the LPG liquid level. The proportional/integrator 102 generates an evaporator outlet LPG steam flow rate correction signal based on the deviation LEVE.
Calculate F CV3M . Adder 103 calculates the evaporator outlet LPG vapor flow rate F CV3 and the evaporator outlet
The LPG vapor flow rate correction signal F CV3M is added to calculate the evaporator inlet LPG liquid flow rate demand signal F CV1D . The subtractor 104 is a subtractor 104 that outputs the evaporator inlet LPG liquid flow rate demand signal F CV1D and the evaporator inlet LPG
Calculate the deviation F CV1E from the liquid flow rate F CV1 . The proportional/integrator 105 calculates the evaporator inlet LPG liquid flow rate control valve CV1 operation signal M CV1 based on the deviation F CV1E , and calculates the evaporator inlet LPG liquid flow rate control valve CV1.
operate.
減算器１０６は、エバポレータLPG蒸気圧力
設定値PEVRとエバポレータLPG蒸気圧力PEVとの
偏差PEVEを計算する。比例・積分器１０７は、偏
差PEVEに基づいて、リボイラ温水流量デマンド信
号FCV2Dを計算する。減算器１０８は、リボイラ
温水流量デマンド信号FCV2Dとリボイラ温水流量
FCV2との偏差FCV2Eを計算する。比例・積分器１
０９は、偏差FCV2Eに基づいてリボイラ温水流量
調節弁CV２操作信号MCV2を計算し、リボイラ温
水流量調節弁CV２を操作する。 The subtractor 106 calculates the deviation P EVE between the evaporator LPG vapor pressure set value P EVR and the evaporator LPG vapor pressure P EV . The proportional/integrator 107 calculates the reboiler hot water flow rate demand signal F CV2D based on the deviation P EVE . The subtractor 108 calculates the reboiler hot water flow rate demand signal F CV2D and the reboiler hot water flow rate.
Calculate the deviation F CV2E from F CV2 . Proportional/integrator 1
09 calculates the reboiler hot water flow rate control valve CV2 operation signal M CV2 based on the deviation F CV2E , and operates the reboiler hot water flow rate control valve CV2.
減算器１１０は、配管LPG蒸気圧力設定値PHR
と配管LPG蒸気圧力PHとの偏差PHEを計算する。
比例・積分器１１１は、偏差PHEに基づいて、エ
バポレータLPG蒸気流量デマンド信号FCV3Dを計
算する。減算器１１２は、エバポレータ出口
LPG蒸気流量デマンド信号FCV3Dとエバポレータ
出口LPG蒸気流量FCV3との偏差FCV3Eを計算する。
比例・積分器１１３は、偏差FCV3Eに基づいてエ
バポレータ出口LPG蒸気流量調節弁CV３操作信
号MCV3を計算し、エバポレータ出口LPG蒸気流
量調節弁CV３を操作する。 The subtractor 110 calculates the piping LPG steam pressure set value P HR
Calculate the deviation P HE between and the piping LPG steam pressure P H.
The proportional/integrator 111 calculates the evaporator LPG vapor flow rate demand signal FCV3D based on the deviation PHE . The subtracter 112 is the evaporator outlet
Calculate the deviation F CV3E between the LPG steam flow rate demand signal F CV3D and the evaporator outlet LPG steam flow rate F CV3 .
The proportional/integrator 113 calculates the evaporator outlet LPG steam flow rate control valve CV3 operation signal M CV3 based on the deviation F CV3E , and operates the evaporator outlet LPG steam flow rate control valve CV3.
減算器１１４は、スーパ・ヒータ出口LPG蒸
気温度設定値TSHRとスーパ・ヒータ出口LPG蒸
気温度TSHとの偏差TSHEを計算する。比例・積分
器１１５は、偏差TSHEに基づいて、スーパ・ヒー
タ温水流量デマンド信号FCV4Dを計算する。減算
器１１６は、スーパ・ヒータ温水流量デマンド信
号FCV4Dとスーパ・ヒータ温水流量FCV4との偏差
FCV4Eを計算する。比例・積分器１１７は、偏差
FCV4Eに基づいてスーパ・ヒータ温水流量調節弁
CV４操作信号MCV4を計算し、スーパ・ヒータ温
水流量調節弁CV４を操作する。 The subtractor 114 calculates the deviation T SHE between the super heater outlet LPG steam temperature set value T SHR and the super heater outlet LPG steam temperature T SH . The proportional/integrator 115 calculates the super heater hot water flow rate demand signal F CV4D based on the deviation T SHE . The subtractor 116 calculates the deviation between the super heater hot water flow rate demand signal F CV4D and the super heater hot water flow rate F CV4 .
Calculate F CV4E . The proportional/integrator 117 calculates the deviation
Super heater hot water flow control valve based on F CV4E
CV4 operation signal M CV4 is calculated and super heater hot water flow rate control valve CV4 is operated.
減算器１１８は、減圧弁CV５後LPG蒸気圧力
設定値PFFRと減圧弁CV５後LPG蒸気圧力PFFとの
偏差PFFEを計算する。比例・積分器１１９は、偏
差PFFEに基づいて、減圧弁CV５出口LPG蒸気流
量デマンド信号FCV5Dを計算する。減算器１２０
は、減圧弁CV５出口LPG蒸気流量デマンド信号
FCV5Dと減圧弁CV５出口LPG蒸気流量FCV5との偏
差FCV5Eを計算する。比例・積分器１２１は、偏
差FCV5Eに基づいて減圧弁CV５操作信号MCV5を計
算し、減圧弁CV５を操作する。 The subtractor 118 calculates the deviation P FFE between the LPG steam pressure set value P FFR after the pressure reducing valve CV5 and the LPG steam pressure P FF after the pressure reducing valve CV5. The proportional/integrator 119 calculates the pressure reducing valve CV5 outlet LPG steam flow rate demand signal F CV5D based on the deviation P FFE . Subtractor 120
is pressure reducing valve CV5 outlet LPG steam flow rate demand signal
Calculate the deviation F CV5E between F CV5D and LPG steam flow rate F CV5 at the outlet of pressure reducing valve CV5. The proportional/integrator 121 calculates a pressure reducing valve CV5 operation signal M CV5 based on the deviation F CV5E , and operates the pressure reducing valve CV5.
減算器１２２は、火力プラント用ボイラの燃料
流量デマンド信号FRDと燃料流量FCV6との偏差
FCV6Eを計算する。比例・積分器１２３は、偏差
FCV6Eに基づいて燃料流量調節弁CV６操作信号
MCV6を計算し、燃料流量調節弁CV６を操作す
る。 The subtractor 122 calculates the deviation between the fuel flow rate demand signal FRD of the boiler for thermal power plants and the fuel flow rate F CV6 .
Calculate F CV6E . The proportional/integrator 123 calculates the deviation
F Fuel flow control valve CV6 operation signal based on CV6E
Calculate M CV6 and operate fuel flow control valve CV6.
ところで、従来のLPG燃流供給プラントは、
火力プラント用ボイラだけでなく、他の工業プラ
ントにもLPG燃料を供給していた。このため、
火力プラント用ボイラで、電力系統の故障のため
に、発電力機出力を定格負荷から10秒程度で発電
所内負荷（５〜10％負荷）まで急速に絞り込む急
速負荷遮断運転を行なつても、LPG燃料供給プ
ラントの燃料負荷は、部分的変化でおさまり、上
述のフイード・バツク制御主体のLPG燃料供給
プラント制御装置でも対応できた。しかしなが
ら、火力プラント用ボイラに１対１対応でLPG
燃料を供給する場合は、火力プラント用ボイラが
急速負荷遮断運転を行なうと、LPG燃料供給プ
ラントも大幅に燃料を絞り込む必要があり、フイ
ード・バツク制御主体の従来のLPG燃料供給プ
ラント制御装置では、操作の遅れが生じ、制御量
が大幅に変動するという問題がある。 By the way, the conventional LPG fuel flow supply plant is
It supplied LPG fuel not only to boilers for thermal power plants, but also to other industrial plants. For this reason,
Even if a boiler for a thermal power plant undergoes rapid load shedding operation in which the generator output is rapidly reduced from the rated load to the power plant load (5 to 10% load) in about 10 seconds due to a power system failure, The fuel load on the LPG fuel supply plant subsided with only a partial change, and was able to be handled by the LPG fuel supply plant control system mainly based on feed back control described above. However, LPG can be used in one-to-one correspondence with boilers for thermal power plants.
When supplying fuel, when a boiler for a thermal power plant performs rapid load shedding operation, the LPG fuel supply plant also needs to significantly reduce the amount of fuel. There is a problem in that there is a delay in operation and the control amount fluctuates significantly.
本発明の目的は、急速負荷遮断運転時において
も、操作の遅れを生じることなく、制御量の変動
を抑え、良好な制御を行ない得るLPG燃料供給
プラント制御装置を提供するにある。 An object of the present invention is to provide an LPG fuel supply plant control device that can suppress fluctuations in the control amount and perform good control without causing any delay in operation even during rapid load shedding operation.
本発明は、急速負荷遮断運転時においても、操
作の遅れを生じることなく、制御量の変動を抑
え、良好な制御を行なうために、火力プラント用
ボイラの燃料流量デマンド信号FRDに基づいて、
各操作端のデマンド信号を計算し、これらのデマ
ンド信号に基づいてフイード・フオワード的に各
操作端を操作するようにしたものである。 The present invention is designed to suppress fluctuations in the control amount and perform good control without causing any delay in operation even during rapid load shedding operation, based on the fuel flow demand signal FRD of the boiler for a thermal power plant.
Demand signals for each operating end are calculated, and each operating end is operated in a feed-forward manner based on these demand signals.
このような構成にしたのは、フイード・バツク
主体の制御では、急速負荷遮断運転時に、LPG
燃料供給プラントの出力端である燃料流量を絞り
込み、その結果として、減圧弁CV５後圧力の上
昇、減圧弁CV５の絞り込み、配管LPG蒸気圧力
の上昇、エバポレータ出力蒸気流量調節弁CV３
の絞り込み、エバポレータLPG蒸気圧力の上昇、
リボイラ温水流量の絞り込みというように上流側
に行く程、操作の遅れが生じ、制御量の変動が大
きくなるので、これを防ぐためである。このた
め、出力端の変化と同期して、上流側の操作量を
急速に絞り込むようにした。こうすることによ
り、サージの発生を抑え、制御量の変動を抑え、
安定な制御が行なえる。 The reason for this configuration is that in feedback-based control, LPG
The fuel flow rate at the output end of the fuel supply plant is throttled, and as a result, the pressure after the pressure reducing valve CV5 increases, the pressure reducing valve CV5 is throttled, the pipe LPG steam pressure increases, and the evaporator output steam flow rate control valve CV3 increases.
throttle, increase in evaporator LPG steam pressure,
This is to prevent the operation delay occurring and the fluctuation of the control amount becoming larger as the flow rate of reboiler hot water is reduced as it goes upstream. For this reason, the operation amount on the upstream side is rapidly narrowed down in synchronization with the change in the output end. By doing this, the occurrence of surges is suppressed, fluctuations in the control amount are suppressed, and
Stable control is possible.
本発明の一実施例を第３図に示す。図から解る
ように、本発明は、火力プラント用ボイラの燃料
流量デマンド信号FRDに基づいて各操作端のデ
マンド信号を計算し、これらのデマンド信号に基
づいてフイード・フオワード的に各操作端を操作
するようにしたものである。次に、第３図に従つ
て本発明の実施例を説明する。 An embodiment of the present invention is shown in FIG. As can be seen from the figure, the present invention calculates a demand signal for each operating end based on the fuel flow rate demand signal FRD of a boiler for a thermal power plant, and operates each operating end in a feed forward manner based on these demand signals. It was designed to do so. Next, an embodiment of the present invention will be described according to FIG.
図において、減算器２０１は、火力プラント用
ボイラの燃料流量デマンド信号FRDと燃料流量
FCV6と偏差FCV6Eを計算する。比例・積分器２０
２は、偏差FCV6Eに基づいて、燃料流量調節弁CV
６操作信号MCV6を計算し、燃料流量調弁CV６を
操作する。 In the figure, a subtracter 201 is used to calculate the fuel flow rate demand signal FRD and the fuel flow rate of a boiler for a thermal power plant.
Calculate F CV6 and deviation F CV6E . Proportional/integrator 20
2 is the fuel flow control valve CV based on the deviation F CV6E .
6 Calculate the operation signal M CV6 and operate the fuel flow control valve CV6.
減算器２０３は、減圧弁CV５後LPG蒸気圧力
設定値PFFRと減圧弁CV５後LPG蒸気圧力PFFとの
偏差PFFEを計算する。比例・積分器２０４は、偏
差PFFEに基づいて、減圧弁CV５出口LPG蒸気流
量設定値修正信号FCV5RMを計算する。加算器２０
５は、減圧弁CV５出口LPG蒸気流量設定値修正
信号FCV5RMと燃料流量デマンド信号FRDを加算
し、減圧弁CV５出口LPG蒸圧流量デマンド信号
FCV5Dを計算する。減算器２０６は、減圧弁CV５
出口LPG蒸気流量デマンド信号FCV5Dと減圧弁CV
５出口LPG蒸気流量FCV5との偏差FCV5Eを計算す
る。比例・積分器２０７は、偏差FCV5Eに基づい
て減圧弁CV５操作信号MCV5を計算し、減圧弁
CV５を操作する。 The subtractor 203 calculates the deviation P FFE between the LPG steam pressure set value P FFR after the pressure reducing valve CV5 and the LPG steam pressure P FF after the pressure reducing valve CV5. The proportional/integrator 204 calculates a pressure reducing valve CV5 outlet LPG steam flow rate set value correction signal F CV5RM based on the deviation P FFE . Adder 20
5 adds the pressure reducing valve CV5 outlet LPG steam flow rate setting value correction signal F CV5RM and the fuel flow rate demand signal FRD to obtain the pressure reducing valve CV5 outlet LPG vapor pressure flow rate demand signal.
Calculate F CV5D . The subtracter 206 is a pressure reducing valve CV5.
Outlet LPG steam flow rate demand signal F CV5D and pressure reducing valve CV
Calculate the deviation F CV5E from the 5 outlet LPG steam flow rate F CV5 . The proportional/integrator 207 calculates the pressure reducing valve CV5 operation signal M CV5 based on the deviation F CV5E , and calculates the pressure reducing valve CV5 operation signal M CV5 .
Operate CV5.
減圧弁２０８は、配管LPG蒸気圧力設定値PHR
と配管LPG蒸気圧力PHとの偏差PHEを計算する。
比例・積分器２０９は、偏差PHEに基づいてエバ
ポレータ出口LPG蒸気流量設定値修正信号FCV3RM
を計算する。加算器２１０は、エバポレータ出口
LPG蒸気流量設定値修正信号FCV3RMと燃料流量デ
マンド信号FRDを加算し、エバポレータ出力
LPG蒸気流量デマンド信号FCV3Dを計算する。減
算器２１１は、エバポレータ出口LPG蒸気流量
デマンド信号FCV3Dとエバポレータ出口LPG蒸気
流量FCV3との偏差FCV3Eを計算する。比例・積分
器２１２は、偏差FCV3Eに基づいて、エバポレー
タ出口LPG蒸気流量調節弁CV３操作信号MCV3を
計算し、エバポレータ出口LPG蒸気流量調節弁
CV３を操作する。 The pressure reducing valve 208 controls the piping LPG steam pressure set value P HR
Calculate the deviation P HE between and the piping LPG steam pressure P H.
The proportional/integrator 209 generates an evaporator outlet LPG steam flow rate setting value correction signal F CV3RM based on the deviation P HE
Calculate. Adder 210 is connected to the evaporator outlet
Evaporator output by adding LPG steam flow rate set value correction signal F CV3RM and fuel flow rate demand signal FRD
Calculate the LPG steam flow rate demand signal F CV3D . The subtractor 211 calculates a deviation F CV3E between the evaporator outlet LPG vapor flow rate demand signal F CV3D and the evaporator outlet LPG vapor flow rate F CV3 . The proportional/integrator 212 calculates the evaporator outlet LPG steam flow rate control valve CV3 operation signal M CV3 based on the deviation F CV3E , and calculates the evaporator outlet LPG steam flow rate control valve CV3 operation signal M CV3 .
Operate CV3.
減算器２１３は、エバポレータ３のLPG液レ
ベル設定値LEVRとLPG液レベルLEVとの偏差LEVE
を計算する。比例・積分器２１４は、偏差LEVEに
基づいてエバポレータ入口LPG液流量設定値修
正信号FCV1RMを計算する。加算器２１５は、エバ
ポレータ入口LPG液流量設定値修正信号FCV1RMと
燃料流量デマンド信号FRDを加算し、エバポレ
ータ入口LPG液流量デマンド信号FCV1Dを計算す
る。減算器２１６は、エバポレータ入口LPG液
流量デマンド信号FCV1Dとエバポレータ入口LPG
液流量FCV1との偏差FCV1Eを計算する。比例・積
分器２１７は、偏差FCV1Eに基づいてエバポレー
タ入口LPG液流量調節弁CV１操作信号MCV1を計
算し、エバポレータ入口LPG液流量調節弁CV１
を操作する。 The subtracter 213 calculates the deviation L EVE between the LPG liquid level setting value L EVR of the evaporator 3 and the LPG liquid level L EV.
Calculate. The proportional/integrator 214 calculates the evaporator inlet LPG liquid flow rate set value correction signal F CV1RM based on the deviation L EVE . Adder 215 adds evaporator inlet LPG liquid flow rate setting value correction signal F CV1RM and fuel flow rate demand signal FRD to calculate evaporator inlet LPG liquid flow rate demand signal F CV1D . The subtractor 216 is a subtracter 216 that outputs the evaporator inlet LPG liquid flow rate demand signal F CV1D and the evaporator inlet LPG
Calculate the deviation F CV1E from the liquid flow rate F CV1 . The proportional/integrator 217 calculates the evaporator inlet LPG liquid flow rate control valve CV1 operation signal M CV1 based on the deviation F CV1E , and calculates the evaporator inlet LPG liquid flow rate control valve CV1.
operate.
つぎに減算器２１８は、エバポレータLPG蒸
気圧力設定値PEVRとエバポレータLPG蒸気圧力
PEVとの偏差PEVEを計算する。比例・積分器２１
９は、偏差PEVEに基づいて、リボイラ温水流量設
定値修正信号FCV2RMを計算する。関数発生器２２
０は、燃料流量デマンド信号FRDに基づいて、
リボイラ温水流量設定値FCV2Rを計算する。燃料
流量デマンド信号FRDとリボイラ温水流量設定
値FCV2Rとの関数関係の例を第４図に示す。これ
は、FRDに対するFCV2の静特性を表わすもので
ある。加算器２２１は、リボイラ温水流量設定値
信号FCV2RMとリボイラ温水流量設定値FCV2Rを加
算し、リボイラ温水流量デマンド信号FCV2Rを計
算する。減算器２２２は、リボイラ温水流量デマ
ンド信号FCV2Dとリボイラ温水流量FCV2との偏差
FCV2Eを計算する。比例・積分器２２３は、偏差
FCV2Eに基づいてリボイラ温水流量調節弁CV２操
作信号MCV2を計算し、リボイラ温水流量調節弁
CV２を操作する。 Next, the subtractor 218 calculates the evaporator LPG steam pressure set value P EVR and the evaporator LPG steam pressure.
Calculate the deviation P EVE from P EV . Proportional/integrator 21
9 calculates the reboiler hot water flow rate setting value correction signal FCV2RM based on the deviation PEVE . Function generator 22
0 is based on the fuel flow demand signal FRD,
Calculate the reboiler hot water flow rate setting value F CV2R . FIG. 4 shows an example of the functional relationship between the fuel flow rate demand signal FRD and the reboiler hot water flow rate set value FCV2R . This represents the static characteristics of F CV2 with respect to FRD. Adder 221 adds reboiler hot water flow rate set value signal F CV2RM and reboiler hot water flow rate set value F CV2R to calculate reboiler hot water flow rate demand signal F CV2R . The subtracter 222 calculates the deviation between the reboiler hot water flow rate demand signal F CV2D and the reboiler hot water flow rate F CV2 .
Calculate F CV2E . The proportional/integrator 223 calculates the deviation
Calculate the reboiler hot water flow rate control valve CV2 operation signal M CV2 based on F CV2E , and
Operate CV2.
減算器２２４は、スーパ・ヒータ出口LPG蒸
気温度設定値TSHRとスーパ・ヒータ出口LPG蒸
気温度TSHとの偏差TSHEを計算する。比例・積分
器２２５は、偏差TSHEに基づいて、スーパ・ヒー
タ温水流量設定値修正信号FCV4RMを計算する。関
数発生器２２６は、燃料流量デマンド信号FRD
に基づいて、スーパ・ヒータ温水流量設定値
FCV4Rを計算する。燃料流量デマンド信号FRDと
スーパ・ヒータ温水流量設定値FCV4Rとの関数関
係を第５図に示す。これは、FRDに対するFCV4
の静特性を表わすものである。加算器２２７は、
スーパ・ヒータ温水流量設定値修正信号FCV4RMと
スーパ・ヒータ温水流量設定値FCV4Rを加算し、
スーパ・ヒータ温水流量デマンド信号FCV4Dを計
算する。減算器２２８は、スーパ・ヒータ温水流
量デマンド信号FCV4Dとスーパ・ヒータ温水流量
FCV4との偏差FCV4Eを計算する。比例・積分器２
２９は、偏差FCV4Eに基づいてスーパ・ヒータ温
水流量調節弁CV４操作信号MCV4を計算し、スー
パ・ヒータ温水流量調節弁CV４を操作する。 The subtractor 224 calculates the deviation T SHE between the super heater outlet LPG steam temperature set value T SHR and the super heater outlet LPG steam temperature T SH . The proportional/integrator 225 calculates the super heater hot water flow rate set value correction signal F CV4RM based on the deviation T SHE . The function generator 226 generates a fuel flow demand signal FRD.
Super heater hot water flow setpoint based on
Calculate F CV4R . FIG. 5 shows the functional relationship between the fuel flow rate demand signal FRD and the super heater hot water flow rate set value FCV4R . This is F CV4 for FRD
It represents the static characteristics of The adder 227 is
Add the super heater hot water flow rate set value correction signal F CV4RM and the super heater hot water flow rate set value F CV4R ,
Calculate the super heater hot water flow rate demand signal F CV4D . The subtractor 228 calculates the super heater hot water flow rate demand signal F CV4D and the super heater hot water flow rate.
Calculate the deviation F CV4E from F CV4 . Proportional/integrator 2
29 calculates a super heater hot water flow rate control valve CV4 operation signal M CV4 based on the deviation F CV4E , and operates the super heater hot water flow rate control valve CV4.
上述した本発明の実施例は、火力プラント用ボ
イラの燃料流量デマンド信号FRDに基づいて各
操作端のデマンド信号を計算し、これらのデマン
ド信号に基づいてフイード・フオワード的に各操
作端を操作するので、急速負荷遮断運転時におい
ても、操作の遅れを生じることなく、制御量の変
動を抑え、良好な制御を行なうことができる。 The embodiment of the present invention described above calculates a demand signal for each operating end based on the fuel flow rate demand signal FRD of a boiler for a thermal power plant, and operates each operating end in a feed forward manner based on these demand signals. Therefore, even during rapid load shedding operation, it is possible to suppress fluctuations in the control amount and perform good control without causing any delay in operation.
発明の実施例においては、火力プラント用ボイ
ラの燃料流量デマンド信号FRDに基づいて、フ
イード・フオワード的に燃料流量調節弁CV６、
減圧弁CV５、エバポレータ出口LPG蒸気流量調
節弁CV３、エバポレータ入口LPG液流量調節弁
CV１、リボイラ温水流量調節弁CV２、スーパ・
ヒータ温水流量調節弁CV４の各弁流量デマンド
信号を決定していた。発明の他の実施例として、
第６図に示すように燃料流量デマンド信号FRD
に基づいて、燃料流量調節弁CV６の流量デマン
ド信号を演算する手段を有し、燃料流量デマンド
信号FRDと同等な燃料流量FCV6に基づいて減圧
弁CV５、エバポレータ出口LPG蒸気流量調節弁
CV３、エバポレータ入口LPG液流量調節弁CV
１、リボイラ温水流量調節弁CV２、スーパ・ヒ
ータ温水流量調節弁CV４の各弁流量デマンド信
号を決定するようにしてもよい。また、第６図の
例において、燃料流量デマンド信号FRDに対応
する加算器３０５の出力である減圧弁CV５流量
デマンド信号FCV5D、あるいは、減圧弁CV５流量
に基づいてエバポレータ出口LPG蒸気流量調節
弁CV３、エバポレータ入口LPG液流量調節弁
CV１、リボイラ温水流量調節弁CV２、スーパ・
ヒータ温水流量調節弁CV４の各弁流量デマンド
信号を決定するようにしてもよい。 In the embodiment of the invention, based on the fuel flow demand signal FRD of the boiler for a thermal power plant, the fuel flow control valve CV6,
Pressure reducing valve CV5, evaporator outlet LPG steam flow control valve CV3, evaporator inlet LPG liquid flow control valve
CV1, reboiler hot water flow control valve CV2, super
Each valve flow rate demand signal of the heater hot water flow rate control valve CV4 was determined. As another embodiment of the invention,
As shown in Figure 6, the fuel flow demand signal FRD
Based on the fuel flow rate FCV6, which is equivalent to the fuel flow rate demand signal FRD, the pressure reducing valve CV5 and the evaporator outlet LPG steam flow rate control valve are calculated.
CV3, Evaporator inlet LPG liquid flow control valve CV
1. Each valve flow rate demand signal may be determined for the reboiler hot water flow rate control valve CV2 and the super heater hot water flow rate control valve CV4. In the example of FIG. 6, the pressure reducing valve CV5 flow rate demand signal F CV5D which is the output of the adder 305 corresponding to the fuel flow rate demand signal FRD, or the evaporator outlet LPG steam flow rate control valve CV3 based on the pressure reducing valve CV5 flow rate. , Evaporator inlet LPG liquid flow control valve
CV1, reboiler hot water flow control valve CV2, super
Each valve flow rate demand signal of the heater hot water flow rate control valve CV4 may be determined.
また、発明の他の実施例として、第７図に示す
ように、燃料流量デマンド信号FRDに基づいて、
燃料流量調節弁CV６、減圧弁CV５の弁流量デマ
ンド信号を演算する手段を有し、燃料流量デマン
ド信号FRDに対応する減圧弁CV５流量FCV5に基
づいて、エバポレータ出口LPG蒸気流量調節弁
CV３、エバポレータ入口LPG液流量調節弁CV
１、リボイラ温水流量調節弁CV２、スーパ・ヒ
ータ温水流量調節弁CV４の各弁流量デマンド信
号を決定するようにしてもよい。また、第７図の
例において、燃料流量デマンド信号FRDに対応
する燃料流量FCV6あるいは、加算器４０５の出力
である減圧弁CV５流量デマンド信号FCV5Dに基づ
いて、エバポレータ出口LPG蒸気流量調節弁CV
３、エバポレータ入口LPG液流量調節弁CV１、
リボイラ温水流量調節弁CV２、スーパ・ヒータ
温水流量調節弁CV４の各弁流量デマンド信号を
決定するようにしてもよい。 Further, as another embodiment of the invention, as shown in FIG. 7, based on the fuel flow rate demand signal FRD,
It has means for calculating the valve flow rate demand signals of the fuel flow rate control valve CV6 and the pressure reducing valve CV5, and based on the pressure reducing valve CV5 flow rate F CV5 corresponding to the fuel flow rate demand signal FRD, the evaporator outlet LPG steam flow rate control valve
CV3, Evaporator inlet LPG liquid flow control valve CV
1. Each valve flow rate demand signal may be determined for the reboiler hot water flow rate control valve CV2 and the super heater hot water flow rate control valve CV4. In the example shown in FIG. 7, based on the fuel flow rate F CV6 corresponding to the fuel flow rate demand signal FRD or the pressure reducing valve CV5 flow rate demand signal F CV5D which is the output of the adder 405,
3. Evaporator inlet LPG liquid flow control valve CV1,
The valve flow rate demand signal for each of the reboiler hot water flow rate control valve CV2 and the super heater hot water flow rate control valve CV4 may be determined.
また、発明の他の実施例として、第８図に示す
ように、燃料流量デマンド信号FRDに基づいて、
燃料流量調節弁CV６、減圧弁CV５、エバポレー
タ出口LPG蒸気流量調節弁CV３の弁流量デマン
ド信号を演算する手段を有し、燃料流量デマンド
信号FRDに対応するエバポレータ出口LPG蒸気
流量FCV3に基づいて、エバポレータ入口LPG液流
量調節弁CV１、リボイラ温水流量調節弁CV２、
スーパ・ヒータ温水流量調節弁CV４の各弁流量
デマンド信号を決定するようにしてもよい。ま
た、第８図の例において、燃料流量デマンド信号
FRDに対応する燃料流量FCV6、加算器５０５の
出力である減圧弁CV５流量デマンド信号、減圧
弁CV５流量FCV5、あるいは加算器５１０の出力
であるエバポレータ出口LPG蒸気流量FCV3に基づ
いて、エバポレータ入口LPG液流量調節弁CV
１、リボイラ温水流量調節弁CV２、スーパ・ヒ
ータ温水流量調節弁CV４の各弁流量デマンド信
号を決定するようにしてもよい。 Further, as another embodiment of the invention, as shown in FIG. 8, based on the fuel flow rate demand signal FRD,
It has means for calculating valve flow rate demand signals of the fuel flow rate control valve CV6, the pressure reducing valve CV5, and the evaporator outlet LPG steam flow rate control valve CV3, and based on the evaporator outlet LPG steam flow rate FCV3 corresponding to the fuel flow rate demand signal FRD, Evaporator inlet LPG liquid flow control valve CV1, reboiler hot water flow control valve CV2,
Each valve flow rate demand signal of the super heater hot water flow rate control valve CV4 may be determined. In addition, in the example of FIG. 8, the fuel flow rate demand signal
Based on the fuel flow rate F CV6 corresponding to FRD, the pressure reducing valve CV5 flow rate demand signal which is the output of the adder 505, the pressure reducing valve CV5 flow rate F CV5 which is the output of the adder 505, or the evaporator outlet LPG steam flow rate F CV3 which is the output of the adder 510, the evaporator Inlet LPG liquid flow control valve CV
1. Each valve flow rate demand signal may be determined for the reboiler hot water flow rate control valve CV2 and the super heater hot water flow rate control valve CV4.
また、発明の他の実施例として、第９図に示す
ように、燃料流量デマンド信号FRDに基づいて、
燃料流量調節弁CV６、減圧弁CV５の弁流量デマ
ンド信号を演算する手段を有し、燃料流量デマン
ド信号FRDに対応するエバポレータ出口LPG蒸
気流量FCV3に基づいて、エバポレータ入口LPG液
流量調節弁CV１、リボイラ温水流量調節弁CV
２、スーパ・ヒータ温水流量調節弁CV４の各弁
流量デマンド信号を決定するようにしてもよい。
また、第９図の例において、燃料流量デマンド信
号FRDに対応する比例・積分器６０９の出力で
あるエバポレータ出口LPG蒸気流量デマンド信
号に基づいて、エバポレータ入口LPG液流量調
節弁CV１、リボイラ温水流量調節弁CV２、スー
パ・ヒータ温水流量調節弁CV４の各弁流量デマ
ンド信号を決定するようにしてもよい。 Further, as another embodiment of the invention, as shown in FIG. 9, based on the fuel flow rate demand signal FRD,
It has means for calculating the valve flow rate demand signals of the fuel flow rate control valve CV6 and the pressure reducing valve CV5, and based on the evaporator outlet LPG vapor flow rate F CV3 corresponding to the fuel flow rate demand signal FRD, the evaporator inlet LPG liquid flow rate control valve CV1, Reboiler hot water flow control valve CV
2. Each valve flow rate demand signal of the super heater hot water flow rate control valve CV4 may be determined.
In addition, in the example of FIG. 9, based on the evaporator outlet LPG steam flow rate demand signal which is the output of the proportional/integrator 609 corresponding to the fuel flow rate demand signal FRD, the evaporator inlet LPG liquid flow rate control valve CV1, the reboiler hot water flow rate control The valve flow rate demand signal for each of the valve CV2 and the super heater hot water flow rate control valve CV4 may be determined.
また、発明の他の実施例として、フイード・フ
オワード的に火力プラント用ボイラの負荷デマン
ド信号、発電機出力、主蒸気流量、ボイラデマン
ド信号、給水流量などの燃料流量デマンド信号
FRDに対応する信号に基づいて、エバポレータ
出口LPG蒸気流量調節弁CV３、エバポレータ入
口LPG液流量調節弁CV１、リボイラ温水流量調
節弁CV２、スーパ・ヒータ温水流量調節弁CV４
の各弁流量デマンド信号を決定するようにしても
よい。 In addition, as other embodiments of the invention, fuel flow demand signals such as a load demand signal of a boiler for a thermal power plant, a generator output, a main steam flow rate, a boiler demand signal, a feed water flow rate, etc.
Based on the signal corresponding to FRD, evaporator outlet LPG steam flow control valve CV3, evaporator inlet LPG liquid flow control valve CV1, reboiler hot water flow control valve CV2, super heater hot water flow control valve CV4
The flow rate demand signal for each valve may be determined.
また、本発明の実施例において、比例・積分器
を使用した部分に、比例・積分・微分器を使用し
てもよい。すなわち、比例・積分器は、プロセス
制御に一般的に使用されており、目標値と制御量
との偏差に比例した値と偏差の積分値により操作
量を決定している。偏差に比例した値は、目標値
の変化に対する制御量の応答を速くする機能があ
り、偏差の積分値は、外乱であつても定常状態で
は制御量を目標値に一致させる機能がある。偏差
に比例した値及び偏差の積分値に加えて偏差の微
分値により操作量を決定するのが比例・積分・微
分器である。偏差の微分値は、目標値の変化に対
する制御量の応答をより速くする機能がある。た
だ、目標値あるいは制御量にノイズが重畳してい
るプロセスでは、ノイズにより制御量の変動が大
きくなる場合がある。本発明は、比例・積分・微
分器を使用することもでき、これにより目標値に
対する制御量の応答が速くなる。 Further, in the embodiments of the present invention, a proportional/integrator/differentiator may be used in the portion where the proportional/integrator is used. That is, the proportional/integrator is generally used in process control, and determines the manipulated variable by a value proportional to the deviation between the target value and the controlled variable and an integral value of the deviation. A value proportional to the deviation has a function of speeding up the response of the controlled variable to a change in the target value, and an integral value of the deviation has a function of making the controlled variable match the target value in a steady state even if there is a disturbance. A proportional/integral/differentiator determines the manipulated variable based on a value proportional to the deviation, an integral value of the deviation, and a differential value of the deviation. The differential value of the deviation has the function of making the response of the control amount faster to changes in the target value. However, in processes where noise is superimposed on the target value or the controlled variable, the fluctuations in the controlled variable may become large due to the noise. The present invention can also use a proportional/integral/differentiator, which speeds up the response of the controlled variable to the target value.
また、本発明の実施例においては、LPG燃料
供給プラントと火力プラント用ボイラが１対１に
対応する場合を扱つたが、LPG燃料供給プラン
トと火力プラント用ボイラが１対Ｎに対応する場
合は、燃料流量調節弁CV６と減圧弁CV５は個個
のボイラと対応しているので、燃料流量調節弁
CV６と減圧弁CV５に対するデマンド信号は個個
のボイラの燃料流量デマンド信号FRDi（ｉ＝１〜
Ｎ）によ決定し、エバポレータ出口LPG蒸気流
量調節弁CV３、エバポレータ入口LPG液流量調
節弁CV１、リボイラ温水流量調節弁CV２、スー
パ・ヒータ温水流量調節弁CV４に対するデマン
ド信号は、上記燃料流量デマンド信号FRDi（ｉ＝
１〜Ｎ）の総和
N
〓i=1
FRDiに基づいて決定
するようにすればよい。 In addition, in the embodiments of the present invention, the case where the LPG fuel supply plant and the boiler for a thermal power plant correspond in a 1:1 ratio was dealt with, but when the LPG fuel supply plant and the boiler for a thermal power plant correspond in a 1:N ratio, , since the fuel flow control valve CV6 and pressure reducing valve CV5 correspond to each boiler, the fuel flow control valve CV6 and the pressure reducing valve CV5 correspond to each boiler.
Demand signals for CV6 and pressure reducing valve CV5 are fuel flow rate demand signals FRD i (i=1 to
N), and the demand signals for the evaporator outlet LPG steam flow control valve CV3, the evaporator inlet LPG liquid flow control valve CV1, the reboiler hot water flow control valve CV2, and the super heater hot water flow control valve CV4 are the above fuel flow rate demand signals. FRD i (i=
1 to N)
It may be determined based on N 〓 i=1 FRD i .
本発明になるLPG燃料供給プラント制御装置
において、火力プラント用ボイラの燃料流量デマ
ンド信号FRDに対応する信号に基づいて、LPG
燃料供給プラントの各操作端のデマンド信号を計
算し、これらのデマンド信号に基づいてフイー
ド・フオワード的に各操作端を操作するので、急
速負荷遮断運転時においても、操作の遅れを生じ
ることなく、制御量の変動を抑え、良好な制御を
行なうことができる。 In the LPG fuel supply plant control device according to the present invention, the LPG
The demand signal for each operating end of the fuel supply plant is calculated, and each operating end is operated in a feed-forward manner based on these demand signals, so there is no delay in operation even during rapid load shedding operation. Fluctuations in the control amount can be suppressed and good control can be performed.
第１図は、LPG燃料供給プラントの説明図、
第２図は、従来のLPG燃料供給プラント制御装
置の例、第３図、第４図、第５図は本発明になる
LPG燃料供給プラント制御装置の一実施例を示
す図、第６図、第７図、第８図、第９図は、本発
明になるLPG燃料供給プラント制御装置の他の
実施例を示す図である。
１……LPG液タンク、２……LPG液ポンプ、
３……エバポレータ、４……リボイラ、５……ス
ーパ・ヒータ、６……温水ポンプ。
Figure 1 is an explanatory diagram of the LPG fuel supply plant;
Fig. 2 is an example of a conventional LPG fuel supply plant control system, and Figs. 3, 4, and 5 are examples of the present invention.
Figures 6, 7, 8, and 9 showing one embodiment of the LPG fuel supply plant control device are diagrams showing other embodiments of the LPG fuel supply plant control device according to the present invention. be. 1... LPG liquid tank, 2... LPG liquid pump,
3... Evaporator, 4... Reboiler, 5... Super heater, 6... Hot water pump.
Claims (1)
リボイラ、スーパ・ヒータ及び温水ポンプを含む
LPG燃料供給プラントを制御する装置において、
燃料流量デマンド信号FRDあるいはFRDに対応
した信号に基づいて、フイード・フオワード的に
燃料流量調節弁、減圧弁、エバポレータ出口
LPG蒸気流量調節弁、エバポレータ入口LPG液
流量調節弁、リボイラ温水流量調節弁及びスー
パ・ヒータ温水流量調節弁の各弁流量デマンド信
号を演算する手段を有し、減圧弁後圧力、配管
LPG蒸気圧力、エバポレータLPG液レベル、エ
バポレータLPG蒸気圧力、スーパ・ヒータ出口
LPG蒸気温度のフイード・バツク信号に基づい
て、減圧弁以下の該各弁流量デマンド信号を修正
し、燃料流量調節弁流量デマンド信号及び減圧弁
以下の該修正された各弁流量デマンド信号により
各弁を操作するようにしたことを特徴とする
LPG燃料供給プラント制御装置。 ２ LPG液タンク、LPG液ポンプ、エバポレー
タ、リボイラ、スーパ・ヒータ及び温水ポンプを
含むLPG燃料供給プラントを制御する装置にお
いて、エバポレータ出口LPG蒸気流量信号ある
いは該信号に対応した信号に基づいて、フイー
ド・フオワード的にエバポレータ入口LPG液流
量調節弁、リボイラ温水流量調節弁、及びスー
パ・ヒータ温水流量調節弁の各弁流量デマンド信
号を演算する手段を有し、エバポレータ入口
LPG液レベル、エバポレータLPG蒸気圧力、ス
ーパ・ヒータ出口LPG蒸気温度のフイード・バ
ツク信号に基づいて、エバポレータ入口LPG液
流量調節弁以下の該各弁流量デマンド信号を修正
し、エバポレータ入口LPG液流量調節弁以下の
該修正された各弁流量デマンド信号によりエバポ
レータ入口LPG液流量調節弁以下の該各弁を操
作するようにしたことを特徴とするLPG燃料供
給プラント制御装置。[Claims] 1 LPG liquid tank, LPG pump, evaporator,
Including reboiler, super heater and hot water pump
In a device that controls an LPG fuel supply plant,
Based on the fuel flow demand signal FRD or a signal corresponding to FRD, the fuel flow control valve, pressure reducing valve, and evaporator outlet are controlled in a feed forward manner.
It has a means for calculating the flow rate demand signal for each valve: LPG steam flow control valve, evaporator inlet LPG liquid flow control valve, reboiler hot water flow control valve, and super heater hot water flow control valve, and the pressure after the pressure reducing valve, piping.
LPG vapor pressure, evaporator LPG liquid level, evaporator LPG vapor pressure, super heater outlet
Based on the LPG steam temperature feed back signal, each valve flow demand signal below the pressure reducing valve is corrected, and each valve It is characterized by being able to operate
LPG fuel supply plant control equipment. 2 In a device that controls an LPG fuel supply plant including an LPG liquid tank, LPG liquid pump, evaporator, reboiler, super heater, and hot water pump, the feed The evaporator inlet LPG liquid flow rate control valve, the reboiler hot water flow rate control valve, and the super heater hot water flow rate control valve each have means for calculating a flow rate demand signal for each valve in a forward manner.
Based on the feedback signals of the LPG liquid level, evaporator LPG vapor pressure, and super heater outlet LPG vapor temperature, the flow rate demand signal for each valve below the evaporator inlet LPG liquid flow control valve is corrected, and the evaporator inlet LPG liquid flow rate is adjusted. An LPG fuel supply plant control device, characterized in that each valve below the evaporator inlet LPG liquid flow control valve is operated by the modified flow rate demand signal for each valve below the valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14893379A JPS5673299A (en) | 1979-11-19 | 1979-11-19 | Controler for lpg fuel supply plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14893379A JPS5673299A (en) | 1979-11-19 | 1979-11-19 | Controler for lpg fuel supply plant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5673299A JPS5673299A (en) | 1981-06-17 |
| JPH0214599B2 true JPH0214599B2 (en) | 1990-04-09 |
Family
ID=15463898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14893379A Granted JPS5673299A (en) | 1979-11-19 | 1979-11-19 | Controler for lpg fuel supply plant |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5673299A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021165242A1 (en) | 2020-02-17 | 2021-08-26 | International Business To Business As | A gesture detection system |
| WO2021165238A1 (en) | 2020-02-17 | 2021-08-26 | International Business To Business As | Hearing aid system integrable in an eyeglass frame |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2623080B2 (en) * | 1984-04-02 | 1997-06-25 | 株式会社日立製作所 | Advanced control type automatic controller |
-
1979
- 1979-11-19 JP JP14893379A patent/JPS5673299A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021165242A1 (en) | 2020-02-17 | 2021-08-26 | International Business To Business As | A gesture detection system |
| WO2021165238A1 (en) | 2020-02-17 | 2021-08-26 | International Business To Business As | Hearing aid system integrable in an eyeglass frame |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5673299A (en) | 1981-06-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105180139A (en) | Main steam temperature control system and method for boiler | |
| GB2411011A (en) | Method and apparatus for drum level control for drum-type boilers | |
| US3417737A (en) | Once-through boiler control system | |
| CN104864385A (en) | Method and device for calculating feed water flow instruction of supercritical unit | |
| JPH0214599B2 (en) | ||
| US3306044A (en) | Regulating system for reducing the effect of heat fluctuations on forced-flow steam boilers in power plants | |
| JPH0214598B2 (en) | ||
| JPS6323448B2 (en) | ||
| JP2000257809A (en) | Pressurized fluidized bed boiler and starting method of same | |
| JP2931141B2 (en) | Control method and apparatus for variable-pressure Benson boiler | |
| JP3792853B2 (en) | Combined cycle control device and gas turbine control device | |
| JPH1151306A (en) | Boiler and control method therefor | |
| JPS6256400B2 (en) | ||
| JP2002081607A (en) | Steam temperature controller for variable pressure once-through boiler | |
| JPH1073205A (en) | Controller for once-through boiler | |
| JP3374745B2 (en) | Process control device and control method thereof | |
| JPS6022241B2 (en) | Main steam pressure control method | |
| JP2002323203A (en) | Vapor temperature control method and device for once- through boiler | |
| JPH0117037B2 (en) | ||
| JPH0674407A (en) | Steam temperature control device for variable pressure once-through boiler | |
| JPS5950002B2 (en) | Steam temperature control device | |
| CN117628491A (en) | Peak regulation and frequency modulation system for thermal power units coupled with jet steam extractor and high-pressure heater | |
| JPH07310902A (en) | Steam temperature control for once-through boiler | |
| JPH0755109A (en) | Multi-stage spray controller for once-through boiler | |
| JPS6229790Y2 (en) |