CN103267403A - Method and system for increasing yield of liquid argon - Google Patents
Method and system for increasing yield of liquid argon Download PDFInfo
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- CN103267403A CN103267403A CN2013101795105A CN201310179510A CN103267403A CN 103267403 A CN103267403 A CN 103267403A CN 2013101795105 A CN2013101795105 A CN 2013101795105A CN 201310179510 A CN201310179510 A CN 201310179510A CN 103267403 A CN103267403 A CN 103267403A
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Abstract
The invention discloses a system for increasing the yield of liquid argon. The system comprises a first crude argon column, a second crude argon column, a buffer tank and a pure argon column. The first crude argon column is connected with the second crude argon column; the second crude argon column is connected with the buffer tank; and the buffer tank is connected with the pure argon column. The first crude argon column performs oxygen and argon separation on argon fractions with the oxygen content ranging from 88% to 92%, which are extracted in the middle of an upper column of an air separation system, and transmits crude argon with the oxygen content smaller than 3%, which is obtained after separation, to the second crude argon column. The second crude argon column performs oxygen and argon separation on the received crude argon with the oxygen content smaller than 3% again and outputs argon obtained after separation, of which the oxygen content is smaller than 3ppm, to the buffer tank. The buffer tank stores the received argon with the oxygen content smaller than 3ppm and outputs the argon to the pure argon column after the flow and the pressure are balanced. The pure argon column performs oxygen and argon separation on the received crude argon with the oxygen content smaller than 3%, which is output by the buffer tank, to extract pure liquid argon products. By means of the system, the yield of liquid argon can be improved.
Description
Technical field
The present invention relates to liquid nitrogen extractive technique field, more particularly, relate to a kind of system and method that improves liquid argon yield.
Background technology
At present, in the production of space division system, regulate ar system and need possess that the king-tower operating mode is stable, oxygen nitrogen product purity is high and sufficient cold.More or less can influence in operation empty ordinary production of dividing big system oxygen amount, the argon content of adding in the atmosphere is on the low side, and begins probably to need 48 hours to the time that generates the product argon from regulating argon cut purity, and the adjusting time is long, yield poorly.Therefore, in most empty branch trade, seldom modulate liquid nitrogen product.Even if the modulation liquid nitrogen product, suitable low of the output of the liquid nitrogen of the system and method for existing modulation liquid nitrogen modulation.
Summary of the invention
In view of this, the invention provides a kind of system and method that improves liquid argon yield, can realize improving the output of liquid argon.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of system that improves liquid argon yield comprises: first crude argon column, second crude argon column, surge tank and pure argon column; Wherein:
Described first crude argon column is connected with second crude argon column; Described second crude argon column is connected with surge tank; Described surge tank is connected with pure argon column;
The oxygen content that described first crude argon column extracts the last tower middle part of space division system is that the argon cut of 88-92% carries out oxygen, argon separates, and the oxygen content that will obtain after will separating is delivered to described second crude argon column less than 3% crude argon;
Described second crude argon column with the oxygen content that receives less than 3% crude argon carry out oxygen again, argon separates, and the oxygen content that will obtain after will separating exports described surge tank to less than the argon gas of 3ppm;
Described surge tank carries out buffer memory with the oxygen content that receives less than the argon gas of 3ppm, after flow, the pressure balance, exports described pure argon column to;
The oxygen content of the described surge tank output that described pure argon column will receive is carried out nitrogen, argon separation less than the argon gas of 3ppm, extracts pure liquid argon product.
Preferably, described system also comprises: first condenser, second condenser, evaporimeter and hydraulic pump; Wherein:
Described first condenser is positioned at the described second crude argon column top;
Described second condenser is positioned at described pure argon column top;
Described evaporimeter is positioned at the bottom of described pure argon column;
Described hydraulic pump is connected between described first crude argon column and second crude argon column.
A kind of method of the raising liquid argon yield based on any described system among the claim 1-2 comprises:
The oxygen content that first crude argon column extracts the last tower middle part of space division system is that the argon cut of 88-92% carries out oxygen, argon separates, and the oxygen content that will obtain after will separating is delivered to second crude argon column less than 3% crude argon;
Second crude argon column with the oxygen content that receives less than 3% crude argon carry out oxygen again, argon separates, and the oxygen content that will obtain after will separating exports surge tank to less than the argon gas of 3ppm;
Surge tank carries out buffer memory with the oxygen content that receives less than the argon gas of 3ppm, after flow, the pressure balance, exports pure argon column to;
Pure argon column with the oxygen content of the surge tank that receives output less than the argon gas of 3ppm carry out nitrogen, argon separates, and extracts pure liquid argon product.
From above-mentioned technical scheme as can be seen, a kind of system that improves liquid argon yield disclosed by the invention, be that the argon cut of 88-92% carries out oxygen by first crude argon column to oxygen content, argon separates, and the oxygen content that will obtain after will separating is delivered to second crude argon column less than 3% crude argon, second crude argon column carries out oxygen again to the crude argon that receives, argon separates, and the oxygen content that will obtain after will separating exports surge tank to less than the argon gas of 3ppm, surge tank carries out buffer memory with the argon gas that receives, flow, after the pressure balance, export pure argon column to, pure argon column finally carries out nitrogen to the argon gas that receives, argon separates, and extracts the straight argon product.Owing to adopted flow and the pressure of the argon gas of surge tank balance second crude argon column output, make the gas that enters pure argon column can remain on constant compression force, make the rectifying completely completely of more argon gas get off, therefore improved the output of liquid argon.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is a kind of structural representation that improves the system of liquid argon yield disclosed by the invention;
Fig. 2 is the another kind of structural representation that improves the system of liquid argon yield disclosed by the invention;
Fig. 3 is a kind of method flow diagram that improves liquid argon yield disclosed by the invention;
Fig. 4 is the another kind of structural representation that improves the system of liquid argon yield disclosed by the invention.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is a part of embodiment of the present invention, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
The embodiment of the invention discloses a kind of system and method that improves liquid argon yield, can realize improving the output of liquid argon.
As shown in Figure 1, be a kind of system that improves liquid argon yield disclosed by the invention, comprise: first crude argon column 101, second crude argon column 102, surge tank 103 and pure argon column 104; Wherein:
First crude argon column 101 is connected with second crude argon column 102; Second crude argon column 102 is connected with surge tank 103; Surge tank 103 is connected with pure argon column 104;
The oxygen content that first crude argon column 101 extracts the last tower middle part of space division system is that the argon cut of 88-92% carries out oxygen, argon separates, and the oxygen content that will obtain after will separating is delivered to second crude argon column 102 less than 3% crude argon;
Second crude argon column 102 with the oxygen content that receives less than 3% crude argon carry out oxygen again, argon separates, and the oxygen content that will obtain after will separating exports surge tank 103 to less than the argon gas of 3ppm;
In the above-described embodiments, the argon cut that is 88-92% by 101 pairs of oxygen content of first crude argon column carries out oxygen, argon separates, and the oxygen content that will obtain after will separating is delivered to second crude argon column 102 less than 3% crude argon, 102 pairs of crude argons that receive of second crude argon column carry out oxygen again, argon separates, and the oxygen content that will obtain after will separating exports surge tank 103 to less than the argon gas of 3ppm, surge tank 103 carries out buffer memory with the argon gas that receives, flow, after the pressure balance, export pure argon column 104 to, pure argon column 104 finally carries out nitrogen to the argon gas that receives, argon separates, and extracts the straight argon product.Owing to adopted flow and the pressure of the argon gas of surge tank 103 balances second crude argon column 102 outputs, make the gas that enters pure argon column 104 can remain on constant compression force, make the rectifying completely completely of more argon gas get off, therefore improved the output of liquid argon.
As shown in Figure 2, the another kind of system that improves liquid argon yield disclosed by the invention comprises: first crude argon column 201, second crude argon column 202, surge tank 203, pure argon column 204, first condenser 205, second condenser 206, evaporimeter 207 and hydraulic pump 208; Wherein:
First crude argon column 201 is connected with second crude argon column 202; Second crude argon column 202 is connected with surge tank 203; Surge tank 203 is connected with pure argon column 204; First condenser 205 is positioned at second crude argon column, 202 tops; Second condenser 206 is positioned at pure argon column 204 tops; Evaporimeter 207 is positioned at the bottom of pure argon column 204; Hydraulic pump 208 is connected between first crude argon column 201 and second crude argon, 202 towers;
The oxygen content that first crude argon column 201 extracts the last tower middle part of space division system is that the argon cut of 88-92% carries out oxygen, argon separates, and the oxygen content that will obtain after will separating is delivered to second crude argon column 202 less than 3% crude argon by hydraulic pump 208;
Second crude argon column 202 with the oxygen content that receives less than 3% crude argon by first condenser 205 carry out oxygen again, argon separates, and the oxygen content that will obtain after will separating exports surge tank 203 to less than the argon gas of 3ppm;
As shown in Figure 3, be a kind of method that improves liquid argon yield disclosed by the invention, comprise:
The oxygen content that S101, first crude argon column extract the last tower middle part of space division system is that the argon cut of 88-92% carries out oxygen, argon separates, and the oxygen content that will obtain after will separating is delivered to second crude argon column less than 3% crude argon;
S102, second crude argon column with the oxygen content that receives less than 3% crude argon carry out oxygen again, argon separates, and the oxygen content that will obtain after will separating exports surge tank to less than the argon gas of 3ppm;
S103, surge tank carry out buffer memory with the oxygen content that receives less than the argon gas of 3ppm, after flow, the pressure balance, export pure argon column to;
S104, pure argon column with the oxygen content of the surge tank output that receives less than the argon gas of 3ppm carry out nitrogen, argon separates, and extracts pure liquid argon product.
In the above-described embodiments, the oxygen content that the last tower middle part of space division system is extracted by first crude argon column is that the argon cut of 88-92% carries out oxygen, argon separates, and the oxygen content that will obtain after will separating is delivered to connected second crude argon column less than 3% crude argon; Second crude argon column with the oxygen content that receives less than 3% crude argon carry out oxygen again, argon separates, and the oxygen content that will obtain after will separating exports connected surge tank to less than the argon gas of 3ppm; Surge tank exports connected pure argon column to after the oxygen content that receives is carried out buffer memory and flow, pressure balance less than the argon gas of 3ppm; Pure argon column with the oxygen content of the surge tank that receives output less than the argon gas of 3ppm carry out nitrogen, argon separates, and extracts the pure liquid argon product that goes out.In the said method, by surge tank flow and the pressure of the argon gas of second crude argon column output is carried out balance, make the gas that enters pure argon column can remain on constant compression force, thereby make the rectifying completely completely of more argon gas get off, improved the output of liquid argon.
As shown in Figure 4, be a kind of system's concrete structure schematic diagram that improves liquid argon yield disclosed by the invention, among the figure, V1 is the control valve that liquid air enters first condenser, V2 is the Liquid level adjusting valve that second crude argon column bottom liquid argon enters first crude argon column, V3 is the pressure-regulating valve that liquid argon is back to second crude argon column, V4 is the coupling cock of first crude argon column and second crude argon column bottom, V5 enters the control valve of pure argon column for the technology argon gas, V6 is crude argon emptying control valve, V7 is the control valve that liquid nitrogen enters second condenser, V8 is the pressure-regulating valve of pure argon column, V9 is liquid argon product drain valve, V10 is the control valve that liquid nitrogen flows out evaporimeter, V11 is the argon gas switch valve in the storage system, V12 is the pure argon column tapping valve, V13 enters the preceding showering guilding valve of storage tank for the liquid argon product, T1 is first crude argon column, T2 is second crude argon column, T3 is pure argon column, T4 is surge tank, K1 is first condenser, K2 is evaporimeter, K3 is second condenser, P is the liquid argon pump.
Said system is in the process of work, the liquid air of at first performing fighting enters the control valve V1 of first condenser, set up the liquid level of second crude argon column T2 bottom, guarantee when 500mm is above, guarantee that the qualified back of liquid argon pump P precooling starts, progressively set up the continuity of argon cut tolerance, control the purity of argon cut well, make the oxygen content control of argon cut in the 88-92% scope.After in the first crude argon column T1 and the second crude argon column T2, carrying out oxygen, argon rectifying, extract the technology argon gas from the bottom of the first condenser K1, the control valve V5 control technology argon gas that enters pure argon column by the technology argon gas enters into surge tank T4, carry out the balance of pressure and flow by surge tank T4 after, the rectifying of nitrogen, argon is carried out in the middle and lower part that enters into pure argon column T3, by controlling the load of the first condenser K1, evaporimeter K2 and the second condenser K3, the size of the control valve V10 of adjustment liquid nitrogen outflow evaporimeter is controlled the nitrogen content in the smart argon.In order to make the qualified fast of seminal fluid argon product, can blow down by opening the showering guilding valve V13 that the liquid argon product enters before the storage tank, close after seeing liquid.
In the above-mentioned course of work, if oxygen content is crossed the low second crude argon column generation nitrogen plug phenomenon that causes easily in the argon cut, oxygen content is too high then to contain the argon amount very little, make recovery rate reduce easily, output reduces, therefore, oxygen content in the argon cut is remained in the 88-92% scope, need be by examining argon cut trend, sharply descend as oxygen content, should turn down the condenser drain valve that tower middle and lower part oxygen enters the valve of dirty nitrogen pipeline and open big pure argon column rapidly and reduce argon, nitrogen content in the argon fraction, avoid the nitrogen plug to take place.In addition, when molecular sieve in pressurising or when in parallel, air compressor machine pressure can decrease, the pressure of last tower also can reduce, the tolerance of argon fraction and purity also can be along with reductions, at this moment should adjust with the emptying amount that reduces the dirty nitrogen of molecular sieve system by opening big air compressor machine stator, perhaps in advance discharge opeing nitrogen valve be opened greatly, improve the purity of argon cut.Also partial oxygen output be can reduce earlier, argon, nitrogen content in the argon fraction reduced.The liquid air choke valve V1 switch of first condenser is wanted slowly especially under high load capacity, to prevent that liquid level significantly fluctuates, and influences the liquid level of second crude argon column bottom then, and the stable of liquid level is to guarantee the stable prerequisite of argon fraction.
In the above-mentioned course of work, the load adjustment of the first condenser K1 is according to the indication of the resistance gauge of the second crude argon column T2, and the liquid level by the first condenser K1 realizes that just it will influence output and the purity of crude argon.Open the valve V1 that big liquid air enters first condenser, the liquid air liquid level raises, and the thermic load of the first condenser K1 increases.But liquid level rises De Taigao, and the liquid air temperature of first condenser K1 bottom can rise, and thermic load reduces on the contrary.So, in the input of the second crude argon column T2, adjust to the liquid level an of the best according to the variation of the first crude argon column T2 resistance gauge.At this moment should increase by the load of the first condenser K1 gradually, too fast operation will be run counter to desire, and whole system is fluctuateed, and will avoid the generation of nitrogen plug phenomenon in operation, in case thereby the first condenser K1 temperature difference reduces even be 0 to quit work, cause ar system to be stopped transport.
In the above-mentioned course of work, it is in order to prevent the stifled minimizing that causes charge flow rate of freezing of pipeline that pure argon column T3 is comprehensively heated, thereby causes the minimizing of product liquid argon.The flow process of heating is: pure argon column T3 is heated at-60 ℃ instrument supply gas by connecting dew point from the argon gas switch valve V11 pipeline place joint in the storage system, enter showering guilding valve V13 before the storage tank as blowing down mouthful from the fixed gas drain of pure argon column T3 and pure argon column tapping valve V12, liquid argon product, in time the contact analyst does the dew point analysis that pure argon column T3 blows down mouth, at the pure argon column T3 that can come into operation below-65 ℃.During pure argon column T3 regulates, control liquid level and the pressure of the pure argon column T3 top second condenser K3 well, hypotony can cause liquid argon to form solid and influence production.Simultaneously, the pure argon column resistance is stable to be the stable sign of pure argon column operating mode, and the valve of opening big pure argon column T3 bottom evaporimeter K2 increases the rising quantity of steam, and the tower internal resistance increases.Drive the liquid nitrogen inlet valve of the big pure argon column T3 second condenser K3, improve the liquid nitrogen liquid level of the second condenser K3, make the capacity of returns of condensation increase, corresponding resistance also increases.When pure argon column T3 tower internal pressure surpassed normal value, the not condenser drain valve of pure argon column T3 can be held greatly automatically, and the discharging incoagulable gas makes pressure recover normal.Regularly switch or often crack not condenser valve, discharging incoagulable gas neon, helium etc.Argon purity control can realize by regulating residual volume, open big pure argon column T3 not the condenser valve can reduce nitrogen content in the liquid argon.
Each embodiment adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and defined General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments herein.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the wideest scope consistent with principle disclosed herein and features of novelty.
Claims (3)
1. a system that improves liquid argon yield is characterized in that, comprising: first crude argon column, second crude argon column, surge tank and pure argon column; Wherein:
Described first crude argon column is connected with second crude argon column; Described second crude argon column is connected with surge tank; Described surge tank is connected with pure argon column;
The oxygen content that described first crude argon column extracts the last tower middle part of space division system is that the argon cut of 88-92% carries out oxygen, argon separates, and the oxygen content that will obtain after will separating is delivered to described second crude argon column less than 3% crude argon;
Described second crude argon column with the oxygen content that receives less than 3% crude argon carry out oxygen again, argon separates, and the oxygen content that will obtain after will separating exports described surge tank to less than the argon gas of 3ppm;
Described surge tank carries out buffer memory with the oxygen content that receives less than the argon gas of 3ppm, after flow, the pressure balance, exports described pure argon column to;
The oxygen content of the described surge tank output that described pure argon column will receive is carried out nitrogen, argon separation less than the argon gas of 3ppm, extracts pure liquid argon product.
2. system according to claim 1 is characterized in that, also comprises: first condenser, second condenser, evaporimeter and hydraulic pump; Wherein:
Described first condenser is positioned at the described second crude argon column top;
Described second condenser is positioned at described pure argon column top;
Described evaporimeter is positioned at the bottom of described pure argon column;
Described hydraulic pump is connected between described first crude argon column and second crude argon column.
3. the method based on the raising liquid argon yield of any described system among the claim 1-2 is characterized in that, comprising:
The oxygen content that first crude argon column extracts the last tower middle part of space division system is that the argon cut of 88-92% carries out oxygen, argon separates, and the oxygen content that will obtain after will separating is delivered to second crude argon column less than 3% crude argon;
Second crude argon column with the oxygen content that receives less than 3% crude argon carry out oxygen again, argon separates, and the oxygen content that will obtain after will separating exports surge tank to less than the argon gas of 3ppm;
Surge tank carries out buffer memory with the oxygen content that receives less than the argon gas of 3ppm, after flow, the pressure balance, exports pure argon column to;
Pure argon column with the oxygen content of the surge tank that receives output less than the argon gas of 3ppm carry out nitrogen, argon separates, and extracts pure liquid argon product.
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| CN201310179510.5A CN103267403B (en) | 2013-05-15 | 2013-05-15 | A kind of system and method improving liquid argon yield |
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Cited By (6)
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| CN109764638A (en) * | 2018-12-13 | 2019-05-17 | 包头钢铁（集团）有限责任公司 | A kind of large oxygen-making machine group ar system varying duty method |
| CN111609668A (en) * | 2020-05-20 | 2020-09-01 | 启东柯兰机电设备有限公司 | Low-temperature air separation method for air separation equipment |
| CN111854326A (en) * | 2020-07-20 | 2020-10-30 | 包头盈德气体有限公司 | High-purity oxygen argon rectification device with safety system |
| CN113074516A (en) * | 2021-04-30 | 2021-07-06 | 开封迪尔空分实业有限公司 | Argon preparation method adopting single tower |
| CN113091402A (en) * | 2021-04-30 | 2021-07-09 | 开封迪尔空分实业有限公司 | Argon making system with single tower |
| CN114183996A (en) * | 2021-11-04 | 2022-03-15 | 灵谷化工集团有限公司 | Liquefied argon preparation method for optimizing argon system start time |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109764638A (en) * | 2018-12-13 | 2019-05-17 | 包头钢铁（集团）有限责任公司 | A kind of large oxygen-making machine group ar system varying duty method |
| CN109764638B (en) * | 2018-12-13 | 2021-11-19 | 包头钢铁（集团）有限责任公司 | Load-variable method for argon system of large oxygen generator set |
| CN111609668A (en) * | 2020-05-20 | 2020-09-01 | 启东柯兰机电设备有限公司 | Low-temperature air separation method for air separation equipment |
| CN111854326A (en) * | 2020-07-20 | 2020-10-30 | 包头盈德气体有限公司 | High-purity oxygen argon rectification device with safety system |
| CN113074516A (en) * | 2021-04-30 | 2021-07-06 | 开封迪尔空分实业有限公司 | Argon preparation method adopting single tower |
| CN113091402A (en) * | 2021-04-30 | 2021-07-09 | 开封迪尔空分实业有限公司 | Argon making system with single tower |
| CN113091402B (en) * | 2021-04-30 | 2022-02-18 | 开封迪尔空分实业有限公司 | Argon making system with single tower |
| CN114183996A (en) * | 2021-11-04 | 2022-03-15 | 灵谷化工集团有限公司 | Liquefied argon preparation method for optimizing argon system start time |
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