JPH0732302U - Waste heat recovery equipment - Google Patents
Waste heat recovery equipmentInfo
- Publication number
- JPH0732302U JPH0732302U JP6190493U JP6190493U JPH0732302U JP H0732302 U JPH0732302 U JP H0732302U JP 6190493 U JP6190493 U JP 6190493U JP 6190493 U JP6190493 U JP 6190493U JP H0732302 U JPH0732302 U JP H0732302U
- Authority
- JP
- Japan
- Prior art keywords
- economizer
- vacuum
- feed water
- waste heat
- deaerator
- 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.)
- Withdrawn
Links
- 239000002918 waste heat Substances 0.000 title claims abstract description 20
- 238000011084 recovery Methods 0.000 title claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 65
- 238000002485 combustion reaction Methods 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 14
- 239000001301 oxygen Substances 0.000 abstract description 14
- 229910052760 oxygen Inorganic materials 0.000 abstract description 14
- 239000007789 gas Substances 0.000 abstract description 10
- 238000005260 corrosion Methods 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract description 3
- 230000000717 retained effect Effects 0.000 abstract description 2
- 238000011144 upstream manufacturing Methods 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 description 9
- 239000007921 spray Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 238000007872 degassing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003610 charcoal Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 238000009849 vacuum degassing Methods 0.000 description 1
Landscapes
- Physical Water Treatments (AREA)
Abstract
(57)【要約】
【目的】 廃熱回収の効率が高く、節炭器管が腐食しな
い装置を実現する。
【構成】 節炭器２の上流側に設けられ給水予熱装置５
と真空装置７が設けられた真空脱気器６を備えたことに
よって、節炭器２に供給される給水３は低真空脱気され
ているために給水温度が低く、排ガスの保有する廃熱を
十分回収することができて、廃熱回収効率を高めること
ができるとともに、溶存酸素が取除かれているために節
炭器２の腐食を防止することができ、信頼性が高くコス
トの安い装置を実現する。
(57) [Abstract] [Purpose] To realize a device that has a high efficiency of waste heat recovery and does not corrode the economizer pipe. [Structure] Water supply preheating device 5 provided upstream of the economizer 2.
By providing the vacuum deaerator 6 provided with the vacuum device 7 and the vacuum device 7, the feed water 3 supplied to the economizer 2 is low-vacuum deaerated, so that the feed water temperature is low and the waste heat of the exhaust gas is retained. Can be sufficiently recovered, waste heat recovery efficiency can be improved, and since dissolved oxygen can be removed, corrosion of the economizer 2 can be prevented, which is highly reliable and inexpensive. Realize the device.
Description
【０００１】[0001]
本考案は、ボイラ等の廃熱を効率よく回収し、信頼性の高い廃熱回収装置に関 する。 The present invention relates to a highly reliable waste heat recovery device that efficiently recovers waste heat from a boiler or the like.
【０００２】[0002]
従来のボイラ等の効率を上昇させるための廃熱回収装置としては、ボイラ排ガ スとボイラ給水を熱交換させる節炭器が一般的に使用されており、図３（ａ）， （ｂ）に示す方式のものがあった。 As a waste heat recovery device for increasing the efficiency of conventional boilers, etc., a economizer for exchanging heat between the boiler exhaust gas and the boiler feed water is generally used, as shown in Figs. 3 (a) and 3 (b). There was a system shown in.
【０００３】 図３（ａ）に示す方式のものは、加熱脱気器１３と高温節炭器１２を組合せた ものであり、給水３を加熱蒸気１４で加熱して脱気した後、節炭器１２に給水し ているために節炭器１２が腐食するおそれがなく、信頼性が高く殆どのボイラで 採用されていた。The system shown in FIG. 3 (a) is a combination of a heating deaerator 13 and a high temperature economizer 12. The feedwater 3 is heated by heating steam 14 to deaerate it, Since the water is supplied to the vessel 12, there is no risk of the economizer 12 corroding, and it was highly reliable and was used in most boilers.
【０００４】 図３（ｂ）に示す方式のものは、低温節炭器１５と加熱脱気器１３を組合せた ものであり、低温で給水するためにボイラ排ガス温度を図３（ａ）に示す方式の ものより下げてボイラ効率を上昇させることが可能であるとともに、給水ポンプ ９を安価とすることができる利点があるが、低温節炭器１５の信頼性が劣るため に小容量、低圧ボイラに限られて採用されていた。The system shown in FIG. 3 (b) is a combination of a low temperature economizer 15 and a heating deaerator 13, and the boiler exhaust gas temperature is shown in FIG. 3 (a) for supplying water at a low temperature. Although there is an advantage that it is possible to raise the boiler efficiency by lowering it than that of the system, and the feed water pump 9 can be made inexpensive, the low-temperature economizer 15 is inferior in reliability, so that it has a small capacity and a low pressure boiler. It was adopted only in.
【０００５】 上記２つの方式においては、いずれも加熱脱気器１３が使用されているが、ボ イラ腐食の原因となる給水中の溶存酸素（常温時１０ｍｇO ／リットル程度) を極力 減らすためであり、ＪＩＳでは、水管ボイラ最高使用圧力が１０〜２０ｋｇｆ／ ｃｍ2 ｇで０．５ｍｇO ／リットル以下、５０ｋｇｆ／ｃｍ2 ｇ以上で０．００７ｍ ｇO ／リットル以下と規定されている。In both of the above two methods, the heating deaerator 13 is used, but this is to reduce dissolved oxygen (about 10 mgO / liter at room temperature) in feed water, which causes boiler corrosion, as much as possible. in JIS, water tube boilers maximum operating pressure is in 10~20kgf / cm 2 g 0.5mgO / liter or less, is defined as 0.007 m gO / liter at 50 kgf / cm 2 g or more.
【０００６】 上記加熱脱気器には様々な形式のものがあるが、その一例を図４に示して説明 する。給水入口１３ａから入った給水３はスプレーノズル１３ｂにより膜状に噴 霧され、スクラバー１３ｃからの蒸気１７により一次加熱及び一次脱気される。 さらに、スクラバー１３ｃで加熱蒸気１８により加熱及び脱気が完了する。水に 含まれていた酸素を含む空気１６は、噴霧された給水３により冷却された後に大 気中へ放出される。There are various types of the above thermal deaerator, and an example thereof will be described with reference to FIG. The water supply 3 entering from the water supply inlet 13a is atomized in a film form by the spray nozzle 13b, and is primarily heated and deaerated by the steam 17 from the scrubber 13c. Further, heating and degassing are completed by the heated steam 18 in the scrubber 13c. The oxygen-containing air 16 contained in the water is discharged into the atmosphere after being cooled by the atomized water supply 3.
【０００７】 給水入口１３ａから入った給水３は、器内圧力の飽和温度になり、給水出口１ ３ｄでの溶存酸素を０．００７ｍｇO ／リットル以下とすることができる。なお、図 ３（ｂ）に示す方式のものの脱気器１３の場合は、内部構造を簡単にし、出口溶 存酸素を０．２５ｍｇO ／リットル以下としている例がある。The feed water 3 that has entered from the feed water inlet 13a reaches the saturation temperature of the internal pressure, and the dissolved oxygen at the feed water outlet 13d can be set to 0.007 mgO / liter or less. In the case of the deaerator 13 of the system shown in FIG. 3 (b), there is an example in which the internal structure is simplified and the outlet dissolved oxygen is 0.25 mgO / liter or less.
【０００８】[0008]
従来の廃熱回収装置において、加熱脱気器と高温節炭器を組合せた方式の場合 、高温節炭器の入口給水温度は１００℃以上になるため、ボイラ排ガス温度を１ ３０℃程度以下に下げることは困難であり、廃熱回収には限界があった。 In the case of the conventional waste heat recovery system that combines a heating deaerator and a high-temperature economizer, the inlet feed water temperature of the high-temperature economizer is 100 ° C or higher, so the boiler exhaust gas temperature should be about 130 ° C or lower. It was difficult to lower it, and there was a limit to waste heat recovery.
【０００９】 低温節炭器と加熱脱気器を組合せた方式の場合、低温節炭器の入口給水温度が ボイラ排ガスの水露点及び酸露点以下となったときに節炭器管外面が腐食すると 共に、節炭器が閉塞を起す危険性があった。In the case of the system combining the low temperature economizer and the heating deaerator, if the inlet feed temperature of the low temperature economizer becomes below the water dew point and acid dew point of the boiler exhaust gas, the outer surface of the economizer tube will corrode. In both cases, there was a risk that the economizer would become blocked.
【００１０】 さらに、給水中の溶存酸素により節炭器管の内面が腐食するために材質をステ ンレス鋼にする等の配慮していたが、信頼性は大幅に劣っていた。 本考案は、予熱装置付真空脱気器を節炭器入口に設けることにより信頼性を確保 し廃熱回収を十分に行うことができる装置を提供することにある。Further, since the inner surface of the economizer pipe is corroded by the dissolved oxygen in the feed water, consideration was given to the material such as stainless steel, but the reliability was significantly poor. An object of the present invention is to provide a device capable of ensuring reliability and sufficiently recovering waste heat by providing a vacuum deaerator with a preheating device at the inlet of the economizer.
【００１１】[0011]
本考案の廃熱回収装置は、給水予熱装置と真空装置が設けられ給水が供給され る真空脱気器、および同真空脱気器に接続され燃焼炉の煙道に設けられ給水を排 出する節炭器を備えたことを特徴としている。 The waste heat recovery device of the present invention is provided with a feed water preheating device and a vacuum device to supply the feed water to the vacuum deaerator, and is connected to the vacuum deaerator to be installed in the flue of the combustion furnace to discharge the feed water. It is characterized by having a economizer.
【００１２】[0012]
上記において、真空脱気器に供給された給水は、給水予熱装置により所定の温 度に予熱された後、真空脱気器内部に供給され、真空装置により低真空状態で飽 和状態とされ、溶存酸素が取除かれる。 In the above, the feed water supplied to the vacuum deaerator is preheated to a predetermined temperature by the feed water preheating device, then supplied to the inside of the vacuum deaerator, and made to be in a saturable state in a low vacuum state by the vacuum device. Dissolved oxygen is removed.
【００１３】 この溶存酸素が取除かれた給水は、真空脱気器より排出されて節炭器に供給さ れ、節炭器が燃焼炉の煙道を流れる排ガスより廃熱を回収した後、燃焼炉に供給 される。The feed water from which the dissolved oxygen has been removed is discharged from the vacuum deaerator and supplied to the economizer, and after the economizer recovers waste heat from the exhaust gas flowing through the flue of the combustion furnace, It is supplied to the combustion furnace.
【００１４】 上記のように、給水は低真空脱気されるために給水温度が低く、排ガスの保有 する廃熱は節炭器により十分に回収することができ、廃熱回収効率を高めること ができる。また、節炭器に供給される給水は溶存酸素が取除かれているため、腐 食することがなく信頼性を高めることができるとともに、節炭器管に安価な材料 を使用することができ、低真空脱気のために真空装置も安価でコスト低減も可能 となる。As described above, since the feed water is deaerated in a low vacuum, the feed water temperature is low, and the waste heat retained in the exhaust gas can be sufficiently recovered by the economizer, which improves the waste heat recovery efficiency. it can. In addition, since the dissolved water is removed from the feed water supplied to the economizer, it is possible to increase reliability without corroding and to use inexpensive materials for the economizer pipe. Because of the low vacuum degassing, the vacuum device is also inexpensive and the cost can be reduced.
【００１５】[0015]
本考案の一実施例に係る廃熱回収装置を図１を用いて説明する。図１に示す本 実施例は、蒸気１１を発生するボイラ１に接続された節炭器２、同節炭器２に給 水ポンプ９を介して接続され真空装置７を介して溶存酸素８を排出する真空脱気 器６、および同脱気器６に接続され給水３が供給されるとともに蒸気又は温水４ が供給される給水予熱装置５を備えている。 A waste heat recovery device according to an embodiment of the present invention will be described with reference to FIG. In the present embodiment shown in FIG. 1, a economizer 2 connected to a boiler 1 that generates steam 11, a economizer 2 connected to the economizer 2 via a water supply pump 9 and dissolved oxygen 8 via a vacuum device 7. It is provided with a vacuum deaerator 6 for discharging, and a water supply preheating device 5 connected to the deaerator 6 to be supplied with supply water 3 and also supplied with steam or hot water 4.
【００１６】 上記において、給水予熱装置５に供給された給水３は、蒸気又は温水４により 予熱されて真空脱気器６に入る。この真空脱気器６では真空装置７により給水の 圧力を低下させて沸騰させ溶存酸素８を取除く。溶存酸素８が取除かれた給水３ は給水ポンプ９を経て節炭器２に入り、ボイラ排ガスと十分に熱交換が行われた 後にボイラ１に給水される。In the above description, the feed water 3 supplied to the feed water preheating device 5 is preheated by the steam or hot water 4 and enters the vacuum deaerator 6. In this vacuum deaerator 6, the pressure of the feed water is reduced by the vacuum device 7 to bring it to a boil and remove the dissolved oxygen 8. The feed water 3 from which the dissolved oxygen 8 has been removed enters the economizer 2 via the water feed pump 9, is sufficiently heat-exchanged with the boiler exhaust gas, and is then fed to the boiler 1.
【００１７】 上記真空脱気器６の例としては、図２に示すように給水入口６ａ、スプレーノ ズル６ｂ、トレー６ｃ、給水出口６ｄ、空気出口６ｅを備えたものがあり、給水 ３はスプレーノズル６ｂにより噴霧され一次脱気された後に、トレー６ｃを落下 することにより二次脱気される。As an example of the vacuum deaerator 6, there is a unit provided with a water supply inlet 6a, a spray nozzle 6b, a tray 6c, a water supply outlet 6d, and an air outlet 6e as shown in FIG. After being sprayed by the nozzle 6b and being primarily degassed, the tray 6c is dropped to be secondly degassed.
【００１８】 給水３に含まれていた空気１６はエゼクタ又は真空ポンプからなる真空装置７ により大気へ放出される。そのため、真空脱気器６内は給水温度の飽和圧力（真 空）になり、給水出口６ｄの給水３の溶存酸素は０．３ｍｇO ／リットル程度以下に なる。The air 16 contained in the water supply 3 is discharged to the atmosphere by the vacuum device 7 including an ejector or a vacuum pump. Therefore, the inside of the vacuum deaerator 6 is saturated with the feed water temperature (empty air), and the dissolved oxygen in the feed water 3 at the feed water outlet 6d is about 0.3 mgO 2 / liter or less.
【００１９】 真空脱気器６へ供給される給水３は、予め給水予熱装置５により予熱されてい るが、これは予熱を行わない場合の脱気器入口の給水温度は通常１０〜５０℃で あり、このまま脱気を行い節炭器２に給水すると、給水温度がボイラ排ガスの水 露点及び酸露点以下となり、節炭器管外面が激しく腐食するためである。これを 防ぐために、脱気器入口の給水温度を蒸気又は温水により７０℃程度まで予熱し ている。The feed water 3 supplied to the vacuum deaerator 6 is preheated by the feed water preheating device 5 in advance. The feed water temperature at the deaerator inlet when the preheating is not performed is usually 10 to 50 ° C. This is because if degassing is performed as it is and water is supplied to the economizer 2, the feed water temperature becomes equal to or lower than the water dew point and the acid dew point of the boiler exhaust gas, and the outer surface of the economizer tube is severely corroded. In order to prevent this, the feed water temperature at the deaerator inlet is preheated to about 70 ° C with steam or hot water.
【００２０】 なお、給水予熱装置５を設けずに蒸気又は温水４を直接真空脱気器６に投入し 給水を予熱することもできる。It is also possible to preheat the feed water by directly supplying the steam or hot water 4 to the vacuum deaerator 6 without providing the feed water preheating device 5.
【００２１】[0021]
本考案の廃熱回収装置は、節炭器の上流側に設けられ給水予熱装置と真空装置 が設けられた真空脱気器を備えたことによって、節炭器に供給される給水は低真 空脱気されているために給水温度が低く、排ガスの保有する廃熱を十分回収する ことができて、廃熱回収効率を高めることができるとともに、溶存酸素が取除か れているために節炭器の腐食を防止することができ、信頼性が高くコストの安い 装置を実現する。 The waste heat recovery device of the present invention is equipped with a vacuum deaerator provided upstream of the economizer and provided with a feedwater preheating device and a vacuum device, so that the feedwater supplied to the economizer is low Since it is degassed, the feed water temperature is low, the waste heat of exhaust gas can be sufficiently recovered, the efficiency of waste heat recovery can be improved, and the dissolved oxygen is removed. Realize a highly reliable and low-cost device that can prevent the corrosion of charcoal equipment.
【図１】本考案の一実施例に係る廃熱回収装置の説明図
である。FIG. 1 is an explanatory view of a waste heat recovery device according to an embodiment of the present invention.
【図２】上記一実施例に係る真空脱気器の説明図であ
る。FIG. 2 is an explanatory diagram of a vacuum deaerator according to the above embodiment.
【図３】従来の装置の説明図で、（ａ）は加熱脱気器と
高温節炭器を組合せた場合、（ｂ）は低温節炭器と高温
脱気器を組合せた場合の説明図である。FIG. 3 is an explanatory view of a conventional apparatus, where (a) is a combination of a heating deaerator and a high temperature economizer, and (b) is an illustration of a combination of a low temperature economizer and a high temperature deaerator. Is.
【図４】上記従来の装置に係る加熱脱気器の説明図であ
る。FIG. 4 is an explanatory diagram of a heating deaerator according to the conventional device.
１ ボイラ ２ 節炭器 ３ 給水 ４ 蒸気又は温水 ５ 給水予熱装置 ６ 真空脱気器 ６ａ 給水入口 ６ｂ スプレーノズル ６ｃ トレー ６ｄ 給水出口 ７ 真空装置 ８ 溶存酸素 ９ 給水ポンプ １１ 蒸気 1 Boiler 2 Economizer 3 Water supply 4 Steam or hot water 5 Water supply preheater 6 Vacuum deaerator 6a Water supply inlet 6b Spray nozzle 6c Tray 6d Water supply outlet 7 Vacuum device 8 Dissolved oxygen 9 Water supply pump 11 Steam
Claims (1)
が供給される真空脱気器、および同真空脱気器に接続さ
れ燃焼炉の煙道に設けられ給水を排出する節炭器を備え
たことを特徴とする廃熱回収装置。1. A vacuum deaerator provided with a feed water preheating device and a vacuum device to which feed water is supplied, and a economizer connected to the vacuum deaerator and provided in a flue of a combustion furnace to discharge the feed water. A waste heat recovery device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6190493U JPH0732302U (en) | 1993-11-17 | 1993-11-17 | Waste heat recovery equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6190493U JPH0732302U (en) | 1993-11-17 | 1993-11-17 | Waste heat recovery equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0732302U true JPH0732302U (en) | 1995-06-16 |
Family
ID=13184613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6190493U Withdrawn JPH0732302U (en) | 1993-11-17 | 1993-11-17 | Waste heat recovery equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0732302U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101403622B1 (en) * | 2012-03-06 | 2014-06-05 | 대우조선해양 주식회사 | Waste heat recovery system for ship that can remove dissolved oxygen by minimizing steam consumption |
-
1993
- 1993-11-17 JP JP6190493U patent/JPH0732302U/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101403622B1 (en) * | 2012-03-06 | 2014-06-05 | 대우조선해양 주식회사 | Waste heat recovery system for ship that can remove dissolved oxygen by minimizing steam consumption |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19980305 |