JPH06269625A - Operation of pretreatment device of air separator - Google Patents
Operation of pretreatment device of air separatorInfo
- Publication number
- JPH06269625A JPH06269625A JP5058424A JP5842493A JPH06269625A JP H06269625 A JPH06269625 A JP H06269625A JP 5058424 A JP5058424 A JP 5058424A JP 5842493 A JP5842493 A JP 5842493A JP H06269625 A JPH06269625 A JP H06269625A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- air
- adsorption tower
- adsorption
- pretreatment device
- 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.)
- Pending
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
-
- 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
- F25J3/04187—Cooling of the purified feed air by recuperative heat-exchange; Heat-exchange with product streams
- F25J3/04193—Division of the main heat exchange line in consecutive sections having different functions
-
- 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
- F25J3/04763—Start-up or control of the process; Details of the apparatus used
- F25J3/04769—Operation, control and regulation of the process; Instrumentation within the process
- F25J3/04775—Air purification and pre-cooling
-
- 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
- F25J2205/30—Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes
- F25J2205/32—Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes as direct contact cooling tower to produce a cooled gas stream, e.g. direct contact after cooler [DCAC]
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
【０００１】[0001]
【産業上の利用分野】本発明は、空気分離装置前処理装
置の運転において、分離器本体の安定運転を継続するの
に適した空気分離装置前処理装置の運転方法に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for operating an air separation device pretreatment device suitable for continuing stable operation of a separator body in the operation of the air separation device pretreatment device.
【０００２】[0002]
【従来の技術】従来技術の一例として、特開平３−２４
９９１３号公報があるが、この従来技術は原料空気量の
変化に応じ、前処理装置吸着塔の切り換え時間、および
再生ガスラインの圧力を変化させようとするものであ
り、前処理装置吸着塔の原料空気ラインの温度に関する
ことについては、何ら述べられていない。2. Description of the Related Art As an example of the prior art, Japanese Patent Laid-Open No. 3-24
Although there is Japanese Patent Publication No. 9913, this prior art is intended to change the switching time of the pretreatment device adsorption tower and the pressure of the regeneration gas line according to the change of the raw material air amount. Nothing is said about the temperature of the feed air line.
【０００３】[0003]
【発明が解決しようとする課題】空気分離装置前処理装
置の運転方法を、ＴＳＡ方式の場合を例にとり、図１の
空気分離装置前処理装置のフロ−略図、図２の空気分離
装置前処理装置の切換タイムチャ−トおよび図３の吸着
塔出口温度と分離器入口温度の関係を用いて説明する。Taking the TSA method as an example of the operation method of the air separation device pretreatment device, a flow diagram of the air separation device pretreatment device of FIG. 1 and the air separation device pretreatment of FIG. This will be described with reference to the apparatus switching time chart and the relationship between the adsorption tower outlet temperature and the separator inlet temperature in FIG.
【０００４】原料空気圧縮機１により規定圧力まで昇圧
された空気は、水ポンプ２で圧送された冷却水と水洗冷
却塔３内で熱交換しながら冷却され、２基またはそれ以
上の数から構成される吸着塔４で、水分や二酸化炭素な
どを除去される。この水分や二酸化炭素などが除去され
た空気は、空気熱交換器５にて分離器本体６より送出さ
れる低温の酸素や窒素などと熱交換しながら、ほぼ液化
温度まで冷却されて、分離器本体６下部へ吹き込まれ
る。The air whose pressure has been raised to a specified pressure by the raw material air compressor 1 is cooled while exchanging heat with the cooling water pumped by the water pump 2 in the washing and cooling tower 3, and is composed of two or more units. Water and carbon dioxide are removed in the adsorption tower 4 that is operated. The air from which water and carbon dioxide have been removed is cooled to almost the liquefaction temperature while exchanging heat with the low-temperature oxygen and nitrogen sent from the separator body 6 in the air heat exchanger 5, and the separator is cooled. It is blown into the bottom of the body 6.
【０００５】一方、吸着塔４はその性能を持続させるた
め、図２の切換タイムチャ−トの如く各切替弁９〜２３
を操作して、吸着工程，脱圧工程，再生ヒータ７などに
よる加熱再生工程，吸着塔内を冷却するための冷却工程
および加圧工程を繰り返す。一般に吸着剤は、圧力が高
く温度が低いほど良く吸着し、逆に圧力が低く温度が高
いほど良く再生できるため、効率を上げるためには上記
のような操作が必要となってくる。しかしながら、上記
操作は、吸着塔４内の温度を約５℃〜３００℃程度まで
変化させることになるが、限られた切換時間、特に冷却
時間内に吸着剤を冷却ガスと同一温度になるまで完全に
冷却できないため、図３の吸着塔出口温度のグラフの如
く、吸着塔４出口の原料空気温度は吸着塔４の切換にと
もない大きく変動してしまう。この原料空気の温度変化
は、分離器本体６の精留バランスを崩すなど、プラント
の安定運転に悪影響を与えてしまう。On the other hand, in order to maintain the performance of the adsorption tower 4, each of the switching valves 9 to 23 as shown in the switching time chart of FIG.
Is repeated to repeat the adsorption step, the depressurization step, the heating regeneration step by the regeneration heater 7 and the like, the cooling step for cooling the inside of the adsorption tower, and the pressurization step. Generally, an adsorbent is better adsorbed as the pressure is higher and the temperature is lower, and conversely, it can be better regenerated as the pressure is lower and the temperature is higher. Therefore, the above-mentioned operation is required to improve the efficiency. However, the above operation changes the temperature in the adsorption tower 4 up to about 5 ° C. to 300 ° C., but until the adsorbent reaches the same temperature as the cooling gas within the limited switching time, particularly the cooling time. Since it cannot be completely cooled, the raw material air temperature at the outlet of the adsorption tower 4 fluctuates greatly as the adsorption tower 4 is switched, as shown in the graph of the adsorption tower outlet temperature in FIG. This temperature change of the raw material air adversely affects the stable operation of the plant, such as disrupting the rectification balance of the separator body 6.
【０００６】上記問題点を解決するため、従来の方法で
は、吸着塔４の冷却工程を長くして温度変化を小さくす
るとか、空気熱交換器５の伝熱面積を多くして熱交換器
自身をクッションにするなどの方法をとり、分離器本体
６に与える影響を小さくしていた。しかし、いずれの方
法にしても経済的観念から見ると問題があり、また、上
記技術ではこの温度変動を十分に防止することが不可能
であったため、高原単位，高回収率のプラントを製作す
る上での障害となっていた。In order to solve the above problems, in the conventional method, the cooling process of the adsorption tower 4 is lengthened to reduce the temperature change, or the heat transfer area of the air heat exchanger 5 is increased to increase the heat exchanger itself. The effect on the separator body 6 was reduced by using a method such as using a cushion. However, either method has a problem from an economic standpoint, and since it was impossible to sufficiently prevent this temperature fluctuation with the above technology, a plant with a high basic unit and a high recovery rate is manufactured. It was an obstacle to the above.
【０００７】本発明の目的は、前処理装置吸着塔から送
出される原料空気の温度を一定に保つことにより、分離
器本体の安定運転を継続することにある。An object of the present invention is to maintain stable operation of the separator body by keeping the temperature of the feed air sent from the adsorption tower of the pretreatment device constant.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するため
に、前処理装置吸着塔の原料空気出口ラインに蓄熱器を
設置して、分離器本体に吹き込む空気の温度を一定に保
つようにしたものである。さらに、通常の運転であれば
この空気の温度変化は、１０℃〜４０℃程度であるた
め、水などの安価な蓄熱剤を使用するようにし、また、
水の温度を制御する必要も無いので水タンクなどの簡単
な設備を使用したものである。In order to achieve the above object, a heat accumulator is installed in the feed air outlet line of the adsorption tower of the pretreatment device so that the temperature of the air blown into the separator body is kept constant. It is a thing. Further, since the temperature change of the air is about 10 to 40 ° C. during normal operation, an inexpensive heat storage agent such as water should be used.
Since it is not necessary to control the water temperature, simple equipment such as a water tank is used.
【０００９】[0009]
【作用】蓄熱器は熱を蓄積する作用があるので、吸着塔
の吸着開始時など吸着剤の温度が比較的高い場合や、吸
着初期の吸着熱により原料空気温度が高い場合にはその
熱を吸収し、逆に吸着終了前など原料空気の温度が低い
場合には、吸収した熱を放出する。それにより、分離器
本体に吹き込む原料空気の温度を一定に保つことができ
る。[Operation] Since the heat accumulator has the function of accumulating heat, if the temperature of the adsorbent is relatively high, such as when adsorption starts in the adsorption tower, or if the temperature of the raw material air is high due to the heat of adsorption at the beginning of adsorption, that heat is When the temperature of the raw material air is low, for example, before the end of adsorption, the absorbed heat is released. Thereby, the temperature of the raw material air blown into the separator body can be kept constant.
【００１０】[0010]
【実施例】以下、本発明の一実施例を図１および図３を
用いて説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.
【００１１】再生の終了した吸着塔４は、加圧工程後再
び吸着工程に入る。しかしながらこの時、冷却工程で完
全に冷却できなかった熱が吸着塔４底部から原料空気と
ともに吸着塔４上部、そしてついには原料空気ラインへ
出ていく。この時の温度は、水洗冷却塔３により冷却さ
れた空気により冷却されながらも、約４０℃程度にもな
る。この原料空気を断熱された蓄熱器例えば水タンク８
に通すことにより、原料空気を冷却するとともにこの水
タンク８に熱を蓄積させる。また、吸着終了前などは、
再生時の熱量も完全に吸着塔４から放出されており、供
給される原料空気の温度プラス吸着熱程度であるため、
比較的低温で約１０℃程度の空気として吸着塔４より送
出される。この時には、逆に水タンク８より熱を吸収す
ることにより、水タンク８を冷却するとともに自らを加
温し、図３の分離器入口温度のグラフに示す如く、分離
器本体６に吹き込む空気の温度を一定に保つことが可能
となる。After the regeneration, the adsorption tower 4 enters the adsorption step again after the pressurization step. However, at this time, the heat that could not be completely cooled in the cooling step flows out from the bottom of the adsorption tower 4 together with the raw material air to the upper portion of the adsorption tower 4 and finally to the raw material air line. The temperature at this time is about 40 ° C. while being cooled by the air cooled by the water washing cooling tower 3. This material air is a heat storage device that is insulated, for example, a water tank 8
The material air is cooled and the heat is accumulated in the water tank 8 by passing the water through the water tank 8. Also, before adsorption is complete,
The amount of heat at the time of regeneration is also completely released from the adsorption tower 4, and is about the temperature of the supplied raw material air plus the heat of adsorption,
It is sent out from the adsorption tower 4 as air at a relatively low temperature of about 10 ° C. At this time, conversely, by absorbing heat from the water tank 8, the water tank 8 is cooled and at the same time heated, and as shown in the graph of the separator inlet temperature in FIG. It is possible to keep the temperature constant.
【００１２】以上、本実施例によれば、蓄熱器として水
タンクという比較的安価で簡単な設備を導入するだけで
分離器本体に吹き込む空気の温度を一定に保つことが実
現できる。これにより、分離器本体の運転を安定化し、
高原単位，高回収率のプラントを得ることが可能とな
る。As described above, according to this embodiment, the temperature of the air blown into the separator main body can be kept constant only by introducing a relatively inexpensive and simple equipment such as a water tank as the heat storage device. This stabilizes the operation of the separator body,
It is possible to obtain a plant with high basic unit and high recovery rate.
【００１３】[0013]
【発明の効果】本発明によれば、比較的簡単な設備で、
分離器本体に吹き込まれる原料空気の温度を一定に保つ
ことができるので、分離器本体の安定運転、ひいては、
高原単位，高回収率のプラントを実現できる効果が得ら
れる。According to the present invention, with relatively simple equipment,
Since the temperature of the raw material air blown into the separator body can be kept constant, stable operation of the separator body, and eventually,
This has the effect of realizing a plant with a high basic unit and a high recovery rate.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明を適用する空気分離装置前処理装置のフ
ロ−の略図である。FIG. 1 is a schematic diagram of a flow of an air separation device pretreatment device to which the present invention is applied.
【図２】前処理装置吸着塔の切り換えタイムチャ−トで
ある。FIG. 2 is a switching time chart of the adsorption tower of the pretreatment device.
【図３】吸着塔出口温度と分離器入口温度の関係を示す
波形図である。FIG. 3 is a waveform diagram showing a relationship between an adsorption tower outlet temperature and a separator inlet temperature.
１…原料空気圧縮機、２…水ポンプ、３…水洗冷却塔、
４…吸着塔、５…空気熱交換器、６…分離器本体、７…
再生ヒ−タ、８…蓄熱器（水タンク）、９〜２３…切替
弁。1 ... Raw material air compressor, 2 ... Water pump, 3 ... Washing cooling tower,
4 ... Adsorption tower, 5 ... Air heat exchanger, 6 ... Separator body, 7 ...
Regeneration heater, 8 ... Heat accumulator (water tank), 9-23 ... Switching valve.
Claims (1)
置において、前処理装置よりの原料空気出口ラインに蓄
熱器を設置し、吸着塔から一定温度の原料空気を送出す
るようにしたことを特徴とする空気分離装置前処理装置
の運転方法。1. A pretreatment device of an adsorption type in an air separation device, wherein a heat accumulator is installed in a raw material air outlet line from the pretreatment device so that raw material air at a constant temperature is delivered from an adsorption tower. Operating method of pretreatment device for air separation device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5058424A JPH06269625A (en) | 1993-03-18 | 1993-03-18 | Operation of pretreatment device of air separator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5058424A JPH06269625A (en) | 1993-03-18 | 1993-03-18 | Operation of pretreatment device of air separator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06269625A true JPH06269625A (en) | 1994-09-27 |
Family
ID=13084007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5058424A Pending JPH06269625A (en) | 1993-03-18 | 1993-03-18 | Operation of pretreatment device of air separator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06269625A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003056981A (en) * | 2001-08-15 | 2003-02-26 | Nippon Sanso Corp | Air liquefier/separator and its heating method |
| JP2007093085A (en) * | 2005-09-28 | 2007-04-12 | Kawasaki Shipbuilding Corp | Carbon dioxide gas removing device |
| CN103691253A (en) * | 2013-12-20 | 2014-04-02 | 上海加力气体有限公司 | Forepart pretreatment device and method related to air separation process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5748600A (en) * | 1980-09-08 | 1982-03-19 | Shin Meiwa Ind Co Ltd | Safety device for work of boom loading car |
| JPS61197088U (en) * | 1985-05-29 | 1986-12-09 | ||
| JPH02120498U (en) * | 1989-03-10 | 1990-09-28 | ||
| JPH047599U (en) * | 1990-05-10 | 1992-01-23 |
-
1993
- 1993-03-18 JP JP5058424A patent/JPH06269625A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5748600A (en) * | 1980-09-08 | 1982-03-19 | Shin Meiwa Ind Co Ltd | Safety device for work of boom loading car |
| JPS61197088U (en) * | 1985-05-29 | 1986-12-09 | ||
| JPH02120498U (en) * | 1989-03-10 | 1990-09-28 | ||
| JPH047599U (en) * | 1990-05-10 | 1992-01-23 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003056981A (en) * | 2001-08-15 | 2003-02-26 | Nippon Sanso Corp | Air liquefier/separator and its heating method |
| JP4580127B2 (en) * | 2001-08-15 | 2010-11-10 | 大陽日酸株式会社 | Air liquefaction separation apparatus and heating method thereof |
| JP2007093085A (en) * | 2005-09-28 | 2007-04-12 | Kawasaki Shipbuilding Corp | Carbon dioxide gas removing device |
| CN103691253A (en) * | 2013-12-20 | 2014-04-02 | 上海加力气体有限公司 | Forepart pretreatment device and method related to air separation process |
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