JPH01159018A - Regeneration apparatus for adsorber in air separating device - Google Patents
Regeneration apparatus for adsorber in air separating deviceInfo
- Publication number
- JPH01159018A JPH01159018A JP62240241A JP24024187A JPH01159018A JP H01159018 A JPH01159018 A JP H01159018A JP 62240241 A JP62240241 A JP 62240241A JP 24024187 A JP24024187 A JP 24024187A JP H01159018 A JPH01159018 A JP H01159018A
- Authority
- JP
- Japan
- Prior art keywords
- heat exchanger
- waste gas
- regeneration
- adsorber
- regeneration heat
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
- F25J3/04163—Hot end purification of the feed air
- F25J3/04169—Hot end purification of the feed air by adsorption of the impurities
- F25J3/04181—Regenerating the adsorbents
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
- F25J3/04157—Afterstage cooling and so-called "pre-cooling" of the feed air upstream the air purification unit and main heat exchange line
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
- F25J3/04163—Hot end purification of the feed air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2205/00—Processes or apparatus using other separation and/or other processing means
- F25J2205/60—Processes or apparatus using other separation and/or other processing means using adsorption on solid adsorbents, e.g. by temperature-swing adsorption [TSA] at the hot or cold end
- F25J2205/66—Regenerating the adsorption vessel, e.g. kind of reactivation gas
- F25J2205/70—Heating the adsorption vessel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2205/00—Processes or apparatus using other separation and/or other processing means
- F25J2205/82—Processes or apparatus using other separation and/or other processing means using a reactor with combustion or catalytic reaction
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Separation Of Gases By Adsorption (AREA)
- Separation By Low-Temperature Treatments (AREA)
Abstract
Description
【発明の詳細な説明】
利用産業分野
この発明は、空気分離装置の精留塔へ冷却原料ガスを供
給する主熱交換器の前段階にて、圧縮した空気中の水分
等を除去しかつ冷却した原料ガス空気を得るための熱再
生式構成からなる吸着器の再生装置の改良に係り、吸着
器の再生用熱交換器に発生するサーマルショックを低減
し熱疲労破壊の発生を防止した空気分離装置における吸
着器用再生装置に関する。Detailed Description of the Invention Field of Application This invention is a method for removing moisture, etc. from compressed air and cooling it at a stage before a main heat exchanger that supplies cooling raw material gas to a rectification column of an air separation device. Regarding the improvement of the adsorber regeneration device consisting of a thermal regeneration type configuration to obtain the raw material gas air, we have developed an air separation system that reduces the thermal shock that occurs in the regeneration heat exchanger of the adsorber and prevents the occurrence of thermal fatigue failure. The present invention relates to a regeneration device for an adsorber in an apparatus.
背景技術
空気分離装置は、水分や炭酸ガス等を除去した空気を昇
圧、冷却して原料ガスとなし、精留塔にて、各気体の沸
点差を利用して分離精製される。BACKGROUND ART An air separation device pressurizes and cools air from which moisture, carbon dioxide, etc. have been removed to obtain a raw material gas, which is then separated and purified in a rectification column using the difference in boiling point of each gas.
、 この空気分離装置の精留塔へ冷却原料ガスを供給す
る主熱交換器の前段階では、吸着剤の冷却、加熱の温度
変化量を利用して、水分及び炭酸ガスを吸着分離する吸
着器が用いられている。, In the stage before the main heat exchanger that supplies the cooled raw material gas to the rectification column of this air separation device, an adsorber is installed that adsorbs and separates moisture and carbon dioxide using temperature changes due to cooling and heating of the adsorbent. is used.
吸着器は一対の吸着剤を充填した吸着塔からなり、吸着
効率を上げるため、冷却した後、常温付近での吸着と加
温による脱着とを交互に行なうが、冷却には前記の主熱
交換器からの低温廃ガスを用い、加温には再生用熱交換
器及びその後段のヒーターにて、加温された廃ガスを利
用している。The adsorber consists of a pair of adsorption towers filled with adsorbents, and in order to increase adsorption efficiency, after cooling, adsorption at around room temperature and desorption by heating are performed alternately. The low-temperature waste gas from the reactor is used for heating, and the heated waste gas is used in the regeneration heat exchanger and subsequent heater.
かかる吸着器用再生装置の構成を、従来装置の回路を示
す第４図に基づいて詳述する。The configuration of such an adsorber regeneration device will be described in detail with reference to FIG. 4, which shows a circuit of a conventional device.
吸入フィルター（１）を経て導入され、圧縮機（２）に
て圧縮された水分を含む圧縮空気は、清浄器（３）にて
触媒等により、ＳＯＸ、 ＮＯＸを除去される。Compressed air containing moisture is introduced through the suction filter (1) and compressed by the compressor (2), and SOX and NOX are removed by a catalyst or the like in the purifier (3).
さらに、圧縮されて高温になった圧縮空気は、吸着器（
１０）の再生用熱交換器（４）及びアフタークーラー（
５）で常温近くまで冷却され、吸着行程中の吸着器（１
０）の例えば、吸着塔（１０ａ）へ電磁弁（１１）を経
て供給され、吸着器（１０ａ）内で、Ｎ２０、ｃｏ２を
除去された後、チエツク弁（１３）及びフィルター（１
５）を通って、空気分離装置の主熱交換器（図示せず）
へ原料空気として供給される。Furthermore, the compressed air that has been compressed to a high temperature is transferred to an adsorber (
10) regeneration heat exchanger (4) and aftercooler (
5), the adsorber (1) is cooled to near room temperature, and the adsorber (1
For example, CO2 is supplied to an adsorption tower (10a) via a solenoid valve (11), and after N20 and CO2 are removed in the adsorption tower (10a), a check valve (13) and a filter (1
5) through the main heat exchanger of the air separation device (not shown)
is supplied as raw air to the
一方、主熱交換器を経て空気分離装置にて製品成分のＮ
２．０２等を分離された残りの廃ガスは、図示しない他
の熱交換装置で冷熱を回収された後、常温程度のガスと
して再び戻り、次の二通りの流れ方をする。Meanwhile, the product component N is passed through the main heat exchanger to the air separation equipment.
The remaining waste gas from which the 2.02, etc. have been separated has its cold heat recovered by another heat exchange device (not shown), and then returns as a gas at about room temperature, and flows in the following two ways.
１つは、吸着器（１０）の一方の吸着塔内の吸着剤を再
生するための流路が設けられ、かかる加温工程中は、前
記戻り廃ガスの通路（６）に設けた３方切換弁（７）に
て切換られ、再生用熱交換器（４）に流れ込み、熱交換
器（４）内で高温の圧縮空気により予熱された後、ヒー
ター（８）で、例えば２００℃程度に加熱され、再生工
程中の吸着器（１０ｂ）へチエツク弁（１６）を経て供
給され、吸着剤よりＮ２０． ＣＯ２を脱着した後、電
磁弁（１８）を経て排気塔（２ｏ）より大気中へ排出さ
れる。One is that a flow path is provided for regenerating the adsorbent in one adsorption column of the adsorption device (10), and during the heating process, the three-way flow path provided in the return waste gas path (6) is provided. It is switched by the switching valve (7), flows into the regeneration heat exchanger (4), is preheated with high-temperature compressed air in the heat exchanger (4), and then heated to, for example, about 200°C by the heater (8). N20. After CO2 is desorbed, it is discharged into the atmosphere from the exhaust tower (2o) via the solenoid valve (18).
次に、加温再生後の吸着器（１０ｂ）を次の吸着工程に
備えて冷却する冷却工程中は、廃ガスは３方切換弁（７
）を経て吸着器（１０）へのバイパス管路（９）へ流れ
、チエツク弁（１６）を経て吸着塔（１０ｂ）へ供給さ
れ吸着剤を冷却した後、電磁弁（１８）より排気塔（２
０）を経て排出される。Next, during the cooling process in which the adsorber (10b) after heating and regeneration is cooled in preparation for the next adsorption process, the waste gas is
) to the bypass pipe (9) to the adsorber (10), and is supplied to the adsorption tower (10b) via the check valve (16) to cool the adsorbent, and then to the exhaust tower ( 2
0).
例えば、下記の如き各工程時間にて行われる。For example, each step is performed at the following times.
吸着器（１０ａ）−吸着工程 約４．５時
間すなわち、一対の吸着器（１０ａＸ１０ｂ）は、所定
の時間サイクルで交互に切換えて使用される従来技術の
問題点
上述した如く、吸着塔（１０ｂ）の冷却工程中は、再生
用熱交換器（４）には廃ガスは流れず、再生用熱交換器
（４）自体は導入される圧縮空気の温度、例えば１１０
℃程度になっている。Adsorption device (10a) - adsorption process for about 4.5 hours In other words, the pair of adsorption devices (10aX10b) are switched alternately in a predetermined time cycle.Problems with the prior art As mentioned above, the adsorption tower (10b) During the cooling process, no waste gas flows into the regeneration heat exchanger (4), and the regeneration heat exchanger (4) itself maintains the temperature of the compressed air introduced, e.g.
It is about ℃.
ところが、吸着器（１０）が切換えられ、吸着塔（１０
ａ）が加温工程となると、３方電磁切換弁（７）が切換
わり、急激に冷たい廃ガス、例えば１０℃程度の多量の
廃ガスが再生用熱交換器（４）に流れ込み、再生用熱交
換器（４）の廃ガス流入部近傍の温度が１１０℃から６
０℃（温度変化量５０℃）まで急激に降下し、一種の熱
ショックを与える。However, the adsorber (10) was switched and the adsorption tower (10)
When a) begins the heating process, the three-way electromagnetic switching valve (7) switches, and suddenly cold waste gas, for example, a large amount of waste gas at about 10°C, flows into the regeneration heat exchanger (4), and the regeneration heat exchanger (4) The temperature near the waste gas inlet of the heat exchanger (4) is from 110℃ to 6
The temperature suddenly drops to 0°C (temperature change: 50°C), giving a kind of thermal shock.
この熱応力は、吸着器（１０）が切換えられる毎に、再
生用熱交換器（４）に与えられるため、長期間の使用に
より、該熱交換器が疲労破壊に至る恐れがあった。Since this thermal stress is applied to the regeneration heat exchanger (4) every time the adsorber (10) is switched, there is a risk that the heat exchanger will suffer fatigue failure after long-term use.
発明の目的
この発明は、熱再生式構成からなる吸着器の再生装置の
耐久性の改良を目的とし、吸着器の再生用熱交換器に発
生するサーマルショックを低減し熱疲労破壊を防止でき
る再生装置を目的としている。Purpose of the Invention The present invention aims to improve the durability of an adsorber regeneration device having a thermal regeneration type configuration, and is aimed at improving the durability of an adsorber regeneration device having a thermal regeneration type configuration. It is intended for equipment.
発明の構成と効果
この発明は、
一対の吸着塔を並列配置し、主熱交換器からの低温廃ガ
スと、再生用熱交換器にて加温した廃ガスとを、交互に
導入可能となした熱再生式吸着器において、
主熱交換器からの廃ガスを吸着器または再生用熱交換器
へ切換える３方切換弁前に、再生用熱交換器へ廃ガスを
導入可能とする分岐管路と、再生用熱交換器通過直後の
廃ガスを吸着器からの排出ガスと混合可能となす分岐管
路を設け、加温切換前に、少量の廃ガスを導入して再生
用熱交換器を予備冷却することを特徴とする空気分離装
置における吸着器用再生装置であり、
また、
主熱交換器からの廃ガスを吸着器または再生用熱交換器
へ切り換える３方切換弁より上流、あるいは吸着器また
は再生用熱交換器への廃ガス通路途中に設けた各開閉弁
より上流に、再生用熱交換器へ少量の廃ガスを導入可能
とする分岐管路を設けて、常時、再生用熱交換器を予備
冷却することを特徴とする空気分離装置における吸着器
用再生装置であり。Structure and Effects of the Invention This invention has a pair of adsorption towers arranged in parallel, making it possible to alternately introduce low-temperature waste gas from the main heat exchanger and waste gas heated by the regeneration heat exchanger. In a heat regeneration type adsorber, before the three-way switching valve that switches the waste gas from the main heat exchanger to the adsorber or the regeneration heat exchanger, a branch pipe that allows waste gas to be introduced into the regeneration heat exchanger. In addition, a branch pipe is installed that allows the waste gas immediately after passing through the regeneration heat exchanger to be mixed with the exhaust gas from the adsorber, and a small amount of waste gas is introduced into the regeneration heat exchanger before heating is switched. It is a regeneration device for an adsorber in an air separation device characterized by pre-cooling, and is also used upstream from a three-way switching valve that switches waste gas from the main heat exchanger to an adsorber or a regeneration heat exchanger, or to an adsorber. Alternatively, branch pipes that allow a small amount of waste gas to be introduced into the regeneration heat exchanger are installed upstream of each on-off valve installed in the waste gas path to the regeneration heat exchanger, so that the regeneration heat exchanger can be constantly exchanged. This is a regeneration device for an adsorber in an air separation device, which is characterized by pre-cooling the adsorber.
さらに、
主熱交換器からの廃ガスを吸着器または再生用熱交換器
へ切り換える３方切換弁を連続切換弁とし、再生用熱交
換器への切換時、導入量を少量から連続的に増大させ、
再生用熱交換器を予備冷却することを特徴とする空気分
離装置における吸着器用再生装置である。Furthermore, the three-way switching valve that switches the waste gas from the main heat exchanger to the adsorber or the regeneration heat exchanger is a continuous switching valve, and when switching to the regeneration heat exchanger, the amount introduced is increased continuously from a small amount. let me,
This is a regeneration device for an adsorber in an air separation device, which is characterized by pre-cooling a regeneration heat exchanger.
この発明は、前述した廃ガス通路の３方切換弁において
、切換後に再生用熱交換器と大きな温度変化量を有する
多量の低温廃ガスが急激に導入され、再生用熱交換器の
廃ガス流入部付近にサーマルショックが発生するのを、
切換前あるいは常時に廃ガスを少量導入して再生用熱交
換器を予備冷却することにより弁切換時の温度変化量を
小さくでき、あるいは連続切換弁により導入量を少量か
ら連続的にかつ経時的に増大することによりサーマルシ
ョックを大きく低減し、再生用熱交換器の寿命を延長で
きるものである。In this invention, in the three-way switching valve of the waste gas passage described above, after switching, a large amount of low-temperature waste gas having a large temperature change is suddenly introduced into the regeneration heat exchanger, and the waste gas flows into the regeneration heat exchanger. To prevent thermal shock from occurring near the
By pre-cooling the regeneration heat exchanger by introducing a small amount of waste gas before switching or at all times, the amount of temperature change at the time of valve switching can be reduced, or by using a continuous switching valve, the amount of waste gas can be introduced continuously from a small amount over time. By increasing the temperature, thermal shock can be greatly reduced and the life of the regeneration heat exchanger can be extended.
発明の図面に基づく開示
第１図はこの発明による再生装置の回路説明図であり、
第２図と第３図はこの発明の他実施例を示す回路説明図
である。DISCLOSURE OF THE INVENTION BASED ON DRAWINGS FIG. 1 is a circuit explanatory diagram of a reproducing device according to the present invention,
FIGS. 2 and 3 are circuit explanatory diagrams showing other embodiments of the present invention.
実施例１
まず、第１図に示す再生装置は、前述した第４図の構成
と同構成であり、さらに、廃ガス通路（６）の３方電磁
切換弁（７）の上流側より分岐し、前記切換弁（７）と
再生用熱交換器（４）とを接続する配管に連結する分岐
配管を設けてこれに電磁弁（３ｏ）を配設する。Embodiment 1 First, the regeneration device shown in FIG. 1 has the same configuration as that shown in FIG. A branch pipe is provided which connects to the pipe connecting the switching valve (7) and the regeneration heat exchanger (4), and a solenoid valve (3o) is provided in this branch pipe.
また、再生用熱交換器（７）とヒーター（８）とを接続
する配管より分岐させた配管を、吸着器（１ｏ）の排出
側の電磁弁（１８Ｘ１９）と排気塔（２ｏ）を接続する
配管の途中に連結し、この分岐配管に電磁弁（３１）を
設けである。In addition, a pipe branched from the pipe connecting the regeneration heat exchanger (7) and the heater (8) is connected to the solenoid valve (18x19) on the discharge side of the adsorber (1o) and the exhaust tower (2o). A solenoid valve (31) is connected to the middle of the piping, and this branch piping is provided with a solenoid valve (31).
作用・効果
かかる分岐配管及び電磁弁（３０Ｘ３１）を設けた再生
装置の作用・効果を説明すると、吸着器（１ｏ）の再生
工程のうち加温工程に切換える前、例えば切換曲数分前
に電磁弁（３０）と電磁弁（３１）を開放し、例えば、
廃ガス通路（６）の通常流量の１／１０の量を再生用熱
交換器（４）へ供給する。Functions and Effects To explain the functions and effects of the regeneration device equipped with branch pipes and solenoid valves (30x31), the electromagnetic Open the valve (30) and the solenoid valve (31), for example,
1/10 of the normal flow rate of the waste gas passageway (6) is supplied to the regeneration heat exchanger (4).
再生用熱交換器（４）の廃ガス流入部付近の温度は、導
入される圧縮空気の温度、例えば１１０”Ｃ程度となっ
ており、再生工程のうち加温工程への切換前に、所定量
の廃ガスを流入させることにより、−旦１１０℃から８
５℃（温度変化量２５℃）まで降下し、予備冷却される
。The temperature near the waste gas inlet of the regeneration heat exchanger (4) is the temperature of the compressed air introduced, for example, about 110"C. By introducing a fixed amount of waste gas, the temperature is reduced from 110°C to 8°C.
The temperature drops to 5°C (temperature change: 25°C) and is pre-cooled.
その後、３方電磁切換弁（７）を切換え、電磁弁（３０
）及び電磁弁（３１）は閉塞して、廃ガスの全流量を再
生用熱交換器（４）へ供給することにより、前記廃ガス
流入部付近の温度は約８５℃から６０℃に低下（温度変
化量２５℃）し、温度変化量が小さくなり、サーマルシ
ョックを大幅に緩和することができる。After that, switch the 3-way solenoid switching valve (7) and switch the solenoid valve (30
) and the solenoid valve (31) are closed and the entire flow of waste gas is supplied to the regeneration heat exchanger (4), thereby reducing the temperature near the waste gas inlet from approximately 85°C to 60°C ( The amount of temperature change is 25°C), the amount of temperature change is small, and thermal shock can be significantly alleviated.
なお、再生用熱交換器（４）を予冷するのに使用された
廃ガスの一部は、脱着ガスと混合されて排気塔（２０）
へ排出される。Note that a part of the waste gas used to pre-cool the regeneration heat exchanger (4) is mixed with desorption gas and sent to the exhaust tower (20).
is discharged to.
なお、再生用熱交換器を通過し温度が上昇した廃ガスを
バイパス管路（９）からの廃ガスと混合し、吸着剤の冷
却に影響の無い程度の温度の廃ガスとして吸着器（１０
）に供給することもでき、この場合電磁弁（３１）及び
電磁弁（３１）と吸着器（１０）の出口を連結する管路
が不用となることは言うまでもない。In addition, the waste gas whose temperature has increased after passing through the regeneration heat exchanger is mixed with the waste gas from the bypass pipe (9), and the waste gas is transferred to the adsorber (10) as waste gas at a temperature that does not affect the cooling of the adsorbent.
), and in this case, it goes without saying that the solenoid valve (31) and the pipe line connecting the solenoid valve (31) and the outlet of the adsorber (10) become unnecessary.
実施例２
次に、第２図に示す再生装置は、前述した第４図及び第
１図の再生装置と同構成からなり、廃ガス通路（６）の
３方電磁切換弁（７）の上流側より分岐し、前記切換弁
（７）と再生用熱交換器（４）とを接続する第１の分岐
管路に連結する少量の廃ガスを導入可能とする第２の分
岐管路（３２）を設けである。Embodiment 2 Next, the regeneration device shown in FIG. 2 has the same configuration as the regeneration device shown in FIG. 4 and FIG. A second branch line (32 ) is provided.
第３図に示す如く、３方電磁切換弁（７）を除去し、バ
イパス管路（９）と第１の分岐管路にそれぞれ電磁弁（
３３Ｘ３４）を設ける場合も、下記の第２図の構成と同
様な効果が得られる。As shown in Fig. 3, the three-way solenoid switching valve (7) is removed, and the solenoid valves (
33×34), the same effect as the configuration shown in FIG. 2 below can be obtained.
作用・効果
３方電磁切換弁（７）がバイパス管路（９）側に切換え
られている場合（冷却工程時）は、廃ガスはその一部が
第２の分岐管路（３２）、再生用熱交換器（４）を経て
、ヒーター（８）より吸着器（１０）へ供給されると共
に、残部の廃ガスは３方電磁切換弁（７）を経てバイパ
ス管路（９）より直接、吸着器（１０）へ供給される。Function/Effect When the three-way electromagnetic switching valve (7) is switched to the bypass pipe (9) side (during the cooling process), part of the waste gas is transferred to the second branch pipe (32) and regenerated. The waste gas is supplied from the heater (8) to the adsorber (10) through the heat exchanger (4), and the remaining waste gas is directly supplied from the bypass pipe (9) through the three-way electromagnetic switching valve (7). It is supplied to the adsorber (10).
しかし、再生用熱交換器（４）とヒーター（８）を経由
する管路、特に第２の分岐管路（３２）の圧力損失を、
バイパス管路（９）の圧力損失に比し大きめになるよう
設定することにより、廃ガスの一部は再生用熱交換器（
４）を通過し、温度は上昇するがその流量が少ないため
、バイパス管路（９）からの廃ガスと混合された後、吸
着剤の冷却に影響の無い程度の温度の廃ガスを吸着器（
１０）に供給することができる。However, the pressure loss in the pipes passing through the regeneration heat exchanger (4) and the heater (8), especially the second branch pipe (32),
By setting the pressure drop to be larger than the pressure loss of the bypass pipe (9), a part of the waste gas is transferred to the regeneration heat exchanger (
4), the temperature rises but the flow rate is small, so after being mixed with the waste gas from the bypass pipe (9), the waste gas is transferred to the adsorbent at a temperature that does not affect the cooling of the adsorbent. (
10).
なお、この際のヒーター（８）は停止されていることは
言うまでもない。It goes without saying that the heater (8) at this time is stopped.
従って、３方電磁切換弁（７）の上流側より分岐し、前
記切換弁（７）と再生用熱交換器（４）とを接続する第
１の分岐管路に連結する少量の廃ガスを導入可能とする
第２の分岐管路（３２）を設けた構成により、導入され
る圧縮空気の温度である例えば１１０℃程度となってい
る再生用熱交換器（４）の廃ガス流入部付近は、所定量
の低温廃ガスを第２の分岐管路（３２）を経てバイパス
させることにより、１１０℃から８５℃まで降下し、予
備冷却されている。Therefore, a small amount of waste gas is connected to the first branch pipe that branches from the upstream side of the three-way electromagnetic switching valve (7) and connects the switching valve (7) and the regeneration heat exchanger (4). Near the waste gas inlet of the regeneration heat exchanger (4), where the temperature of the compressed air introduced is, for example, about 110° C. due to the configuration provided with the second branch pipe line (32) that allows introduction of the compressed air. is precooled from 110°C to 85°C by bypassing a predetermined amount of low-temperature waste gas through the second branch line (32).
その後、３方電磁切換弁（７）を切り換えて電磁弁（３
３）を閉塞して、廃ガスの全流量を再生用熱交換器（４
）へ供給することにより、前記廃ガス流入部付近の温度
は約８５℃から６０℃に低下し、温度変化量が小さくな
り、サーマルショックを大幅に緩和することができる。After that, switch the 3-way solenoid switching valve (7) to the solenoid valve (3).
3) and transfer the entire flow of waste gas to the regeneration heat exchanger (4).
), the temperature near the waste gas inlet is lowered from about 85°C to 60°C, the amount of temperature change becomes smaller, and thermal shock can be significantly alleviated.
なお、第３図の実施例では、その後、電磁弁（３３）を
閉塞して、電磁弁（３４）を解放して、廃ガスの
′全流量を再生用熱交換器（４）へ供給することにより
、同様に温度変化量が小さくなり、サーマルショックを
大幅に緩和することができる。In the embodiment shown in FIG. 3, the solenoid valve (33) is then closed, the solenoid valve (34) is opened, and the waste gas is discharged.
' By supplying the entire flow to the regeneration heat exchanger (4), the amount of temperature change is similarly reduced, and thermal shock can be significantly alleviated.
実施例３
第４図に示す従来の再生装置と同様構成において、３方
電磁切換弁の替わりに、導入量を少量から暫時連続的に
増大できる連続切換弁を用いて試験を行ったところ、再
生用熱交換器の廃ガス流入部付近の熱応力は、３方切換
電磁弁を用いた従来の再生装置に比較して、約１／４に
低減できた。Example 3 With the same configuration as the conventional regeneration device shown in Fig. 4, a test was conducted using a continuous switching valve that can continuously increase the amount introduced from a small amount in place of the three-way electromagnetic switching valve. Thermal stress near the waste gas inlet of the industrial heat exchanger was reduced to about 1/4 compared to a conventional regenerator using a three-way switching solenoid valve.
以上のように、この発明では加温工程時の弁切換におい
て、実施例１，２では、弁切換前にあるいは常時予備冷
却側ることにより、従来装置の温度変化量（５０℃）か
ら約１／２程度（２５℃）まで減少するなめ、実施例３
では連続的に増大させながら切換えることにより、サー
マルショックを緩和でき、再生用熱交換器、特にその廃
ガス流入部付近の熱応力が大幅に低減し、熱疲労破壊の
発生を防止できる。As described above, in the present invention, when switching the valve during the heating process, in Examples 1 and 2, by pre-cooling the valve before switching or at all times, the amount of temperature change (50°C) of the conventional device is approximately 1 /2 (25°C), Example 3
By switching while continuously increasing the temperature, thermal shock can be alleviated, and the thermal stress in the regeneration heat exchanger, especially in the vicinity of the waste gas inlet part, can be significantly reduced, and the occurrence of thermal fatigue failure can be prevented.
第１図はこの発明による再生装置の回路説明図であり、
第２図と第３図はこの発明の他実施例を示す回路説明図
である。
第４図は従来の再生装置の回路説明図である。
１・・・吸入フィルター、２・・・圧縮機、３・・・清
浄器、４・・・再生用熱交換器、５・・・アフタークー
ラー、６・・・廃ガス通路、７・・・３方電磁切換弁、
８・・・ヒーター、９・・・バイパス管路、１ｏ・・・
吸着器、１０ａ、１０ｂ−吸着塔、１１，１２，１８，
１９，３０，３１，３３．３４・・・電磁弁、１３，１
４，１６．１７・・・チエツク弁、１５・・・フィルタ
ー、２０・・・排気塔、３２・・・分岐管路。FIG. 1 is a circuit explanatory diagram of a reproduction device according to the present invention,
FIGS. 2 and 3 are circuit explanatory diagrams showing other embodiments of the present invention. FIG. 4 is a circuit explanatory diagram of a conventional playback device. 1... Suction filter, 2... Compressor, 3... Purifier, 4... Regeneration heat exchanger, 5... Aftercooler, 6... Waste gas passage, 7... 3-way solenoid switching valve,
8...Heater, 9...Bypass pipe line, 1o...
Adsorption device, 10a, 10b-adsorption tower, 11, 12, 18,
19,30,31,33.34...Solenoid valve, 13,1
4,16.17...Check valve, 15...Filter, 20...Exhaust tower, 32...Branch pipe.
Claims (1)
スと、再生用熱交換器にて加温した廃ガスとを、交互に
導入可能となした熱再生式吸着器において、 主熱交換器からの廃ガスを吸着器または再生用熱交換器
へ切換える３方切換弁前に、再生用熱交換器へ廃ガスを
導入可能とする分岐管路と、再生用熱交換器通過直後の
廃ガスを吸着器からの排出ガスと混合可能となす分岐管
路を設け、加温切換前に、少量の廃ガスを導入して再生
用熱交換器を予備冷却することを特徴とする空気分離装
置における吸着器用再生装置。 ２ 一対の吸着塔を並列配置し、主熱交換器からの低温廃ガ
スと、再生用熱交換器にて加温した廃ガスとを、交互に
導入可能となした熱再生式吸着器において、 主熱交換器からの廃ガスを吸着器または再生用熱交換器
へ切り換える３方切換弁より上流、あるいは吸着器また
は再生用熱交換器への廃ガス通路途中に設けた各開閉弁
より上流に、再生用熱交換器へ少量の廃ガスを導入可能
とする分岐管路を設けて、常時、再生用熱交換器を予備
冷却することを特徴とする空気分離装置における吸着器
用再生装置。 ３ 一対の吸着塔を並列配置し、主熱交換器からの低温廃ガ
スと、再生用熱交換器にて加温した廃ガスとを、交互に
導入可能となした熱再生式吸着器において、 主熱交換器からの廃ガスを吸着器または再生用熱交換器
へ切り換える３方切換弁を連続切換弁とし、再生用熱交
換器への切換時、導入量を少量から連続的に増大させ、
再生用熱交換器を予備冷却することを特徴とする空気分
離装置における吸着器用再生装置。[Claims] 1. A heat generating system in which a pair of adsorption towers are arranged in parallel, and low-temperature waste gas from the main heat exchanger and waste gas heated by the regeneration heat exchanger can be introduced alternately. In the regenerative adsorber, before the three-way switching valve that switches the waste gas from the main heat exchanger to the adsorber or the regeneration heat exchanger, a branch pipe line that allows waste gas to be introduced into the regeneration heat exchanger; A branch pipe is provided that allows the waste gas that has just passed through the regeneration heat exchanger to be mixed with the exhaust gas from the adsorber, and a small amount of waste gas is introduced to pre-cool the regeneration heat exchanger before switching to heating. A regeneration device for an adsorber in an air separation device, characterized in that: 2. In a thermal regeneration type adsorption device in which a pair of adsorption towers are arranged in parallel and low-temperature waste gas from the main heat exchanger and waste gas heated by the regeneration heat exchanger can be introduced alternately, Upstream of the 3-way switching valve that switches the waste gas from the main heat exchanger to the adsorber or regeneration heat exchanger, or upstream of each on-off valve installed in the waste gas path to the adsorber or regeneration heat exchanger. A regeneration device for an adsorber in an air separation device, characterized in that a branch pipe line is provided to allow a small amount of waste gas to be introduced into the regeneration heat exchanger, and the regeneration heat exchanger is always pre-cooled. 3. In a thermal regeneration type adsorption device in which a pair of adsorption towers are arranged in parallel and low-temperature waste gas from the main heat exchanger and waste gas heated by the regeneration heat exchanger can be introduced alternately, The three-way switching valve that switches the waste gas from the main heat exchanger to the adsorber or the regeneration heat exchanger is a continuous switching valve, and when switching to the regeneration heat exchanger, the amount introduced is continuously increased from a small amount,
A regeneration device for an adsorber in an air separation device, characterized in that a regeneration heat exchanger is precooled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62240241A JPH0640940B2 (en) | 1987-09-04 | 1987-09-24 | Regeneration device for adsorber in air separation device |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22224187 | 1987-09-04 | ||
| JP62-222241 | 1987-09-04 | ||
| JP62240241A JPH0640940B2 (en) | 1987-09-04 | 1987-09-24 | Regeneration device for adsorber in air separation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01159018A true JPH01159018A (en) | 1989-06-22 |
| JPH0640940B2 JPH0640940B2 (en) | 1994-06-01 |
Family
ID=26524767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62240241A Expired - Fee Related JPH0640940B2 (en) | 1987-09-04 | 1987-09-24 | Regeneration device for adsorber in air separation device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0640940B2 (en) |
-
1987
- 1987-09-24 JP JP62240241A patent/JPH0640940B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0640940B2 (en) | 1994-06-01 |
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