CN103223288B

CN103223288B - Pressure swing adsorption decarbonization device and process

Info

Publication number: CN103223288B
Application number: CN201310117558.3A
Authority: CN
Inventors: 刘伟; 王攀; 刘欣; 张�林; 袁红玲; 宋肖盼; 宋仁委
Original assignee: Henan Xinlianxin Fertilizer Co Ltd
Current assignee: Jiangxi Xinlianxin Chemical Industry Co ltd; Xinjiang Xinlianxin Energy Chemical Co ltd; Henan Xinlianxin Chemicals Group Co Ltd
Priority date: 2013-04-08
Filing date: 2013-04-08
Publication date: 2015-01-21
Anticipated expiration: 2033-04-08
Also published as: CN103223288A

Abstract

The present invention belongs to the technical field of gas separation, in particular to a pressure swing adsorption decarbonization device and process that can improve processing load and recovery and achieve energy saving; the pressure swing adsorption decarbonization device includes a water separator that is communicated to the raw gas pipelines; the water separator is respectively communicated with an air inlet of a first section adsorption tower group through pipelines, and an air outlet of the first section adsorption tower group is communicated with the air inlet of a second section adsorption tower group through a semi-finished buffer tank, and the air outlet of the second section adsorption tower group sequentially communicate with the purified gas buffer tank and the high-pressure machine through pipelines; the device can increase processing load and recovery, and achieve energy saving.

Description

Pressure-changeable adsorption decarbonization device and technique

Technical field

The invention belongs to gas separation technique field, be specifically related to a kind of raising processing load and the rate of recovery, realize pressure-changeable adsorption decarbonization device and the technique of economize on electricity consumption reduction.

Background technology

The CO that purified gas requires is depended in the design of PSA device ₂percentage, more Gao Zeke adds being all installed with on meter, and with many gas recoveries, accomplish that emptying pressure is low, gas loss is little as far as possible.How to reduce SR, improve the emphasis that gas reclaiming rate becomes pressure swing adsorption decarbonization technical research.Existing pressure-changeable adsorption decarbonization device, is designed to one section of 20 adsorption tower, two sections of 20 adsorption towers, and operation sequential is 20-5-8/v4, and two sections is 20-5-9/v4, and process tolerance is 180000Nm ³, purified gas CO ₂being 0.5%, by the longtime running of the said equipment, finding when full machine is produced, because load is comparatively large, in order to make purified gas CO ₂control in index, make each section of adsorption cycle reach the shortest, emptying number of times increases, and gas loss rate increases.

Summary of the invention

The object of the invention is to overcome defect of the prior art and a kind of processing load and rate of recovery of improving is provided, realizing pressure-changeable adsorption decarbonization device and the technique of economize on electricity consumption reduction.

The object of the present invention is achieved like this: comprise the separator be connected with unstripped gas pipeline, separator is connected with first workshop section's adsorption tower group air inlet respectively by pipeline, the gas outlet of first workshop section's adsorption tower group is connected with second workshop section's adsorption tower group air inlet by semi-finished product surge tank, and the gas outlet of second workshop section's adsorption tower group is connected with high-pressure unit with purified gas surge tank successively by pipeline, described first workshop section's adsorption tower group is 24 adsorption tower parallel connections, described second workshop section's adsorption tower group is 24 adsorption tower parallel connections, described first workshop section's adsorption tower group respectively with gas recovery system, gas exhausting pipeline, inverse put gas surge tank, exhaust surge tank, carbon dioxide buffer tank is connected, inverse put gas surge tank is connected with carbon dioxide buffer tank respectively by pipeline with exhaust surge tank, carbon dioxide buffer tank is connected with carbon dioxide compression systems, the first three-way valve is provided with between first workshop section's adsorption tower group and inverse put gas surge tank, 3rd end of the first three-way valve is connected with gas exhausting pipeline by the 9th valve, between first described workshop section's adsorption tower group and exhaust surge tank, the first vavuum pump is installed, the first valve is provided with between separator and first workshop section's adsorption tower group air inlet, pipeline between the gas outlet of first workshop section's adsorption tower group and semi-finished product surge tank is provided with the second three-way valve, the first end of the second three-way valve is connected with the gas outlet of first workshop section's adsorption tower group, pipeline between second end of the second three-way valve and semi-finished product surge tank is provided with the second valve, second three-way valve is connected with first workshop section's adsorption tower group, the 3rd valve is provided with between semi-finished product surge tank and second workshop section's adsorption tower group, described second workshop section's adsorption tower group by respectively with boosting gas surge tank, be connected with blowing-out gas burner along venting surge tank, boosting gas surge tank is connected with first workshop section's adsorption tower group respectively with along venting surge tank, the tenth valve is provided with between second workshop section's adsorption tower group and blowing-out gas burner, the second vavuum pump is provided with between described tenth valve and second workshop section's adsorption tower group, be provided with the 6th valve between described second workshop section's adsorption tower group and purified gas surge tank, described purified gas surge tank is connected with second workshop section's adsorption tower group by pipeline.

Be provided with the 5th valve between described second workshop section's adsorption tower group and boosting gas surge tank, between boosting gas surge tank and first workshop section's adsorption tower group, be provided with the 8th valve; Described second workshop section's adsorption tower group and suitable venting between surge tank are provided with the 4th valve, are provided with the 7th valve along between venting surge tank and first workshop section's adsorption tower group.

A kind of pressure varying adsorption decarburization process comprises the steps:

Step one: make unstripped gas remove the moisture in unstripped gas through separator;

Step 2: make step one remove the unstripped gas after moisture through first workshop section's adsorption tower group, described first workshop section's adsorption tower group is made up of 24 adsorption tower parallel connections, wherein each adsorption tower is successively through 24 cycles, each adsorption tower passes through absorption within 24 cycles, one all falls, two all fall, three all fall, four all fall, five all fall, six all fall, seven all fall, eight all fall, nine all fall, along putting, reversely bleed off pressure one, reversely bleed off pressure two, reversely bleed off pressure three, find time, pre-loading, nine all rise, eight all rise, seven all rise, six all rise, five all rise, four all rise, three all rise, two all rise, one all rises, the state of filling pre-end and filling eventually, above-mentioned is 24 cycles one circulations,

In 24 adsorption towers of above-mentioned first workshop section's adsorption tower group, when adsorption tower enters along when putting state, the gas in this adsorption tower enters in gas recovery system; When adsorption tower enter reverse bleed off pressure a state time, the gas in this adsorption tower enters in gas exhausting pipeline; When adsorption tower enter reverse bleed off pressure two-state time, make the gas in this adsorption tower enter in gas exhausting pipeline or inverse put gas surge tank by regulating the first three-way valve and the 9th valve; When adsorption tower enter reverse bleed off pressure three condition time, the gas in this adsorption tower enters in carbon dioxide compression systems by carbon dioxide buffer tank; When adsorption tower enters evacuated, start the first vavuum pump, make the gas in this adsorption tower enter in exhaust surge tank; Gas in described inverse put gas surge tank and exhaust surge tank enters in carbon dioxide compression systems by carbon dioxide buffer tank;

Step 3: the unstripped gas in above-mentioned steps two is discharging semi-finished product gas in first workshop section's adsorption tower group gas outlet after above-mentioned running status, semi-finished product gas is made to enter in first workshop section's adsorption tower group or semi-finished product surge tank by regulating the second three-way valve, enter the end inflation use of semi-finished product gas as adsorption tower in first workshop section's adsorption tower group of first workshop section's adsorption tower group, the semi-finished product gas wherein entered in semi-finished product surge tank enters in second workshop section's adsorption tower group with stable flow pressure 2.0MPa-2.3MPa after semi-finished product surge tank, second workshop section's adsorption tower group is made up of 24 adsorption tower parallel connections, wherein each adsorption tower is successively through 24 cycles, each adsorption tower passes through absorption within 24 cycles, along putting one, one all falls, two all fall, three all fall, four all fall, five all fall, six all fall, seven all fall, eight all fall, nine all fall, ten all fall, along putting two, reversely bleed off pressure one, reversely bleed off pressure two, vacuumize, ten all rise, nine all rise, eight all rise, seven all rise, six all rise, five all rise, four all rise, three all rise, two all rise, one all rises, the state of filling eventually, above-mentioned is 24 cycles one circulations,

In 24 adsorption towers of above-mentioned second workshop section's adsorption tower group, when adsorption tower enters along when putting a state, gas in this adsorption tower enters in first workshop section's adsorption tower group by boosting gas surge tank, use is inflated as the pre-end of adsorption tower in first workshop section's adsorption tower group, when adsorption tower enter reverse bleed off pressure a state time, gas in this adsorption tower is by entering in first workshop section's adsorption tower group along venting surge tank, pre-loading gas as adsorption tower in first workshop section's adsorption tower group uses, when adsorption tower enter reverse bleed off pressure two or vacuumize state time, gas in this adsorption tower is burnt by blowing-out gas burner,

Step 4: the semi-finished product gas in step 3 is after second workshop section's adsorption tower group, the gas of second workshop section's adsorption tower group gas outlet is the purified gas of carbon dioxide content≤1.2%, described purified gas enters in high-pressure unit by purified gas surge tank, purified gas surge tank is connected with second workshop section's adsorption tower group by pipeline, and the purified gas in purified gas surge tank is used as the inflation at end of adsorption tower in second workshop section's adsorption tower group.

The present invention includes and increase adsorption tower and Improving Working Timing control system, comprise increase by 8 adsorption towers, can be implemented in each half cycle of operation and all have 6 absorption tower adsorbs, extend adsorption time; In technique, first workshop section's adsorption tower group and second workshop section's adsorption tower group respectively increase again and once all press, and improve nitrogen hydrogen purity, thus reduce exhausted air quantity.Improving Working Timing device: operation sequential of the present invention a section is 24-6-9R/V ₅, two sections is 24-6-10/V ₅, process tolerance is 200000m ³/ h, purified gas CO ₂content is 0.8-1.2%, reduces decarbonization system resistance, drops to 38Kpa by 44Kpa, can make system power consumption decline 3Kwh, simultaneously owing to extending adsorption time.Adopt the six towers adsorbed gas simultaneously rate of recovery to improve 0.97% than original technique average recovery rate, adsorption time extends 12%; Purified gas tolerance presses 105000Nm ³/ h calculates, many recovery available gas 1000Nm ³/ h, makes synthetic ammonia output raise 0.33T/h (by ton synthetic ammonia folding purified gas 3000m ³), annual by effectively producing 350 days, the calculating of ton ammonia consumption 1.06 tons, coal, can economize on coal the whole year 2938.32 tons (1100 yuan, ton coal meters), direct economic benefit 323.2152 ten thousand yuan.

The present invention has raising processing load and the rate of recovery, realizes the advantage of economize on electricity consumption reduction.

Accompanying drawing explanation

Fig. 1 is structural representation of the present invention.

Fig. 2 is flow diagram of the present invention.

Fig. 3 is the operation sequential chart of the present invention first workshop section adsorption tower group.

Fig. 4 is the operation sequential chart of the present invention second workshop section adsorption tower group.

Detailed description of the invention

As shown in Figure 1,2,3, 4, the present invention includes the separator 1 be connected with unstripped gas pipeline, separator 1 is connected with first workshop section's adsorption tower group 2 air inlet respectively by pipeline, the gas outlet of first workshop section's adsorption tower group 2 is connected with second workshop section's adsorption tower group 4 air inlet by semi-finished product surge tank 3, and the gas outlet of second workshop section's adsorption tower group 4 is connected with high-pressure unit 8 with purified gas surge tank 7 successively by pipeline, described first workshop section's adsorption tower group 2 is 24 adsorption tower parallel connections, described second workshop section's adsorption tower group 4 is 24 adsorption tower parallel connections, described first workshop section's adsorption tower group 2 respectively with gas recovery system 21, gas exhausting pipeline 22, inverse put gas surge tank 23, exhaust surge tank 25, carbon dioxide buffer tank 26 is connected, inverse put gas surge tank 23 is connected with carbon dioxide buffer tank 26 respectively by pipeline with exhaust surge tank 25, carbon dioxide buffer tank 26 is connected with carbon dioxide compression systems 27, the first three-way valve 19 is provided with between first workshop section's adsorption tower group 2 and inverse put gas surge tank 23, 3rd end of the first three-way valve 19 is connected with gas exhausting pipeline 22 by the 9th valve 18, between first described workshop section's adsorption tower group 2 and exhaust surge tank 25, first vavuum pump 24 is installed, the first valve 10 is provided with between separator 1 and first workshop section's adsorption tower group 2 air inlet, pipeline between the gas outlet of first workshop section's adsorption tower group 2 and semi-finished product surge tank 3 is provided with the second three-way valve 20, the first end of the second three-way valve 20 is connected with the gas outlet of first workshop section's adsorption tower group 2, pipeline between second end of the second three-way valve 20 and semi-finished product surge tank 3 is provided with the second valve 11, second three-way valve 20 is connected with first workshop section's adsorption tower group 2, the 3rd valve 12 is provided with between semi-finished product surge tank 3 and second workshop section's adsorption tower group 4, described second workshop section's adsorption tower group 4 by respectively with boosting gas surge tank 6, be connected with blowing-out gas burner 28 along venting surge tank 5, boosting gas surge tank 6 is connected with first workshop section's adsorption tower group 2 respectively with along venting surge tank 5, the tenth valve 9 is provided with between second workshop section's adsorption tower group 4 and blowing-out gas burner 28, the second vavuum pump 29 is provided with between described tenth valve 9 and second workshop section's adsorption tower group 4, be provided with the 6th valve 15 between described second workshop section's adsorption tower group 4 and purified gas surge tank 7, described purified gas surge tank 7 is connected with second workshop section's adsorption tower group 4 by pipeline.Be provided with the 5th valve 14 between described second workshop section's adsorption tower group 4 and boosting gas surge tank 6, between boosting gas surge tank 6 and first workshop section's adsorption tower group 2, be provided with the 8th valve 17; Described second workshop section's adsorption tower group 4 and suitable venting between surge tank 5 are provided with the 4th valve 13, are provided with the 7th valve 16 along between venting surge tank 5 and first workshop section's adsorption tower group 2.

A kind of pressure varying adsorption decarburization process, comprises the steps:

Step one: make unstripped gas remove moisture in unstripped gas through separator 1;

Step 2: make step one remove the unstripped gas after moisture through first workshop section's adsorption tower group 2, described first workshop section's adsorption tower group 2 is made up of 24 adsorption tower parallel connections, wherein each adsorption tower is successively through 24 cycles, each adsorption tower passes through absorption within 24 cycles, one all falls, two all fall, three all fall, four all fall, five all fall, six all fall, seven all fall, eight all fall, nine all fall, along putting, reversely bleed off pressure one, reversely bleed off pressure two, reversely bleed off pressure three, find time, pre-loading, nine all rise, eight all rise, seven all rise, six all rise, five all rise, four all rise, three all rise, two all rise, one all rises, the state of filling pre-end and filling eventually, above-mentioned is 24 cycles one circulations,

In 24 adsorption towers of above-mentioned first workshop section's adsorption tower group 2, when adsorption tower enters along when putting state, the gas in this adsorption tower enters in gas recovery system 21; When adsorption tower enter reverse bleed off pressure a state time, the gas in this adsorption tower enters in gas exhausting pipeline 22; When adsorption tower enter reverse bleed off pressure two-state time, make the gas in this adsorption tower enter in gas exhausting pipeline 22 or inverse put gas surge tank 23 by regulating the first three-way valve 19 and the 9th valve 18; When adsorption tower enter reverse bleed off pressure three condition time, the gas in this adsorption tower enters in carbon dioxide compression systems 27 by carbon dioxide buffer tank 26; When adsorption tower enters evacuated, start the first vavuum pump 24, make the gas in this adsorption tower enter in exhaust surge tank 25; Described inverse put gas surge tank 23 enters in carbon dioxide compression systems 27 with the gas in exhaust surge tank 25 by carbon dioxide buffer tank 26;

Step 3: the unstripped gas in above-mentioned steps two is discharging semi-finished product gas in first workshop section's adsorption tower group 2 gas outlet after above-mentioned running status, semi-finished product gas is made to enter in first workshop section's adsorption tower group 2 or semi-finished product surge tank 3 by regulating the second three-way valve 20, enter the end inflation use of semi-finished product gas as adsorption tower in first workshop section's adsorption tower group 2 of first workshop section's adsorption tower group 2, the semi-finished product gas wherein entered in semi-finished product surge tank 3 enters in second workshop section's adsorption tower group 4 with stable flow pressure 2.0MPa-2.3MPa after semi-finished product surge tank 3, second workshop section's adsorption tower group 4 is made up of 24 adsorption tower parallel connections, wherein each adsorption tower is successively through 24 cycles, each adsorption tower passes through absorption within 24 cycles, along putting one, one all falls, two all fall, three all fall, four all fall, five all fall, six all fall, seven all fall, eight all fall, nine all fall, ten all fall, along putting two, reversely bleed off pressure one, reversely bleed off pressure two, vacuumize, ten all rise, nine all rise, eight all rise, seven all rise, six all rise, five all rise, four all rise, three all rise, two all rise, one all rises, the state of filling eventually, above-mentioned is 24 cycles one circulations,

In 24 adsorption towers of above-mentioned second workshop section's adsorption tower group 4, when adsorption tower enters along when putting a state, gas in this adsorption tower enters in first workshop section's adsorption tower group 2 by boosting gas surge tank 6, use is inflated as the pre-end of adsorption tower in first workshop section's adsorption tower group 2, when adsorption tower enter reverse bleed off pressure a state time, gas in this adsorption tower is by entering in first workshop section's adsorption tower group 2 along venting surge tank 5, pre-loading gas as adsorption tower in first workshop section's adsorption tower group 2 uses, when adsorption tower enter reverse bleed off pressure two or vacuumize state time, gas in this adsorption tower is burnt by blowing-out gas burner 28,

Step 4: the semi-finished product gas in step 3 is after second workshop section's adsorption tower group 4, the gas of second workshop section's adsorption tower group 4 gas outlet is the purified gas of carbon dioxide content≤1.2%, described purified gas enters in high-pressure unit 8 by purified gas surge tank 7, purified gas surge tank 7 is connected with second workshop section's adsorption tower group 4 by pipeline, and the purified gas in purified gas surge tank 7 is used as the inflation at end of adsorption tower in second workshop section's adsorption tower group 4.

Embodiment 1

When needs process tolerance is 150700Nm ³unstripped gas time:

Step 2: make step one remove the unstripped gas after moisture through first workshop section's adsorption tower group 2, described first workshop section's adsorption tower group 2 is made up of 24 adsorption tower parallel connections, wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, in 24 cycles, the state of first half section 24 adsorption towers of period 1 is followed successively by: absorption, pre-end fills, two all rise, four all rise, six all rise, eight all rise, pre-loading, find time, find time, find time, find time, find time, reversely bleed off pressure three, reversely bleed off pressure one, nine all fall, seven all fall, five all fall, three all fall, one all falls, absorption, absorption, absorption, absorption, absorption,

In 24 adsorption towers of above-mentioned first workshop section's adsorption tower group 2, when adsorption tower enters along when putting state, the gas in this adsorption tower enters in gas recovery system 21; When adsorption tower enter reverse bleed off pressure a state time, the gas in this adsorption tower enters in gas exhausting pipeline 22; When adsorption tower enter reverse bleed off pressure two-state time, make the gas in this adsorption tower enter in gas exhausting pipeline 22 by regulating the first three-way valve 19 and the 9th valve 18; When adsorption tower enter reverse bleed off pressure three condition time, the gas in this adsorption tower enters in carbon dioxide compression systems 27 by carbon dioxide buffer tank 26; When adsorption tower enters evacuated, start the first vavuum pump 24, make the gas in this adsorption tower enter in exhaust surge tank 25; Described inverse put gas surge tank 23 enters in carbon dioxide compression systems 27 with the gas in exhaust surge tank 25 by carbon dioxide buffer tank 26;

Step 3: the unstripped gas in above-mentioned steps two is discharging semi-finished product gas in first workshop section's adsorption tower group 2 gas outlet after above-mentioned running status, semi-finished product gas is made to enter in semi-finished product surge tank 3 by regulating the second three-way valve 20, the semi-finished product gas entered in semi-finished product surge tank 3 enters in second workshop section's adsorption tower group 4 with stable flow pressure 2.3MPa after semi-finished product surge tank 3, second workshop section's adsorption tower group 4 is made up of 24 adsorption tower parallel connections, wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, in 24 cycles, the state of first half section 24 adsorption towers of period 1 is followed successively by: absorption, one all rises, three all rise, five all rise, seven all rise, nine all rise, vacuumize, vacuumize, vacuumize, vacuumize, vacuumize, vacuumize, reversely bleed off pressure one, ten all fall, eight all fall, six all fall, four all fall, two all fall, along putting one, absorption, absorption, absorption, absorption, absorption,

Step 4: the semi-finished product gas in step 3 after second workshop section's adsorption tower group 4, the gas of second workshop section's adsorption tower group 4 gas outlet to be carbon dioxide content be 1.2% purified gas, described purified gas is entered in high-pressure unit 8 by purified gas surge tank 7.

Embodiment 2

When needs process tolerance is 151000Nm ³unstripped gas time:

Step 2: make step one remove the unstripped gas after moisture through first workshop section's adsorption tower group 2, described first workshop section's adsorption tower group 2 is made up of 24 adsorption tower parallel connections, wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, in 24 cycles, the state of second half section 24 adsorption towers of period 1 is followed successively by: absorption, fill eventually, one all rises, three all rise, five all rise, seven all rise, nine all rise, find time, find time, find time, find time, find time, find time, reversely bleed off pressure two, along putting, eight all fall, six all fall, four all fall, two all fall, absorption, absorption, absorption, absorption, absorption,

In 24 adsorption towers of above-mentioned first workshop section's adsorption tower group 2, when adsorption tower enters along when putting state, the gas in this adsorption tower enters in gas recovery system 21; When adsorption tower enter reverse bleed off pressure a state time, the gas in this adsorption tower enters in gas exhausting pipeline 22; When adsorption tower enter reverse bleed off pressure two-state time, make the gas in this adsorption tower enter in inverse put gas surge tank 23 by regulating the first three-way valve 19 and the 9th valve 18; When adsorption tower enter reverse bleed off pressure three condition time, the gas in this adsorption tower enters in carbon dioxide compression systems 27 by carbon dioxide buffer tank 26; When adsorption tower enters evacuated, start the first vavuum pump 24, make the gas in this adsorption tower enter in exhaust surge tank 25; Described inverse put gas surge tank 23 enters in carbon dioxide compression systems 27 with the gas in exhaust surge tank 25 by carbon dioxide buffer tank 26;

Step 3: the unstripped gas in above-mentioned steps two is discharging semi-finished product gas in first workshop section's adsorption tower group 2 gas outlet after above-mentioned running status, a semi-finished product gas part is made to enter in first workshop section's adsorption tower group 2 by regulating the second three-way valve 20, another part enters in semi-finished product surge tank 3, enter the end inflation use of semi-finished product gas as adsorption tower in first workshop section's adsorption tower group 2 of first workshop section's adsorption tower group 2, the semi-finished product gas wherein entered in semi-finished product surge tank 3 enters in second workshop section's adsorption tower group 4 with stable flow pressure 2.0MPa after semi-finished product surge tank 3, second workshop section's adsorption tower group 4 is made up of 24 adsorption tower parallel connections, wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, in 24 cycles, the state of second half section 24 adsorption towers of period 1 is followed successively by: absorption, fill eventually, two all rise, four all rise, six all rise, eight all rise, ten all rise, vacuumize, vacuumize, vacuumize, vacuumize, vacuumize, vacuumize, reversely bleed off pressure two, along putting two, nine all fall, seven all fall, five all fall, three all fall, one all falls, absorption, absorption, absorption, absorption, absorption,

Step 4: the semi-finished product gas in step 3 is after second workshop section's adsorption tower group 4, the gas of second workshop section's adsorption tower group 4 gas outlet to be carbon dioxide content be 0.6% purified gas, a described purified gas part enters in high-pressure unit 8 by purified gas surge tank 7, another part of purified gas is connected with second workshop section's adsorption tower group 4 by pipeline by purified gas surge tank 7, and the purified gas in purified gas surge tank 7 is used as the inflation at end of adsorption tower in second workshop section's adsorption tower group 4.

Embodiment 3

When needs process tolerance is 158000Nm ³unstripped gas time:

Step 2: make step one remove the unstripped gas after moisture through first workshop section's adsorption tower group 2, described first workshop section's adsorption tower group 2 is made up of 24 adsorption tower parallel connections, wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, in 24 cycles, the state of first half section 24 adsorption towers of second round is followed successively by absorption, absorption, pre-end fills, two all rise, four all rise, six all rise, eight all rise, pre-loading, find time, find time, find time, find time, find time, reversely bleed off pressure three, reversely bleed off pressure one, nine all fall, seven all fall, five all fall, three all fall, one all falls, absorption, absorption, absorption, absorption,

In 24 adsorption towers of above-mentioned first workshop section's adsorption tower group 2, when adsorption tower enters along when putting state, the gas in this adsorption tower enters in gas recovery system 21; When adsorption tower enter reverse bleed off pressure a state time, the gas in this adsorption tower enters in gas exhausting pipeline 22; When adsorption tower enter reverse bleed off pressure two-state time, make the gas in this adsorption tower enter a part by regulating the first three-way valve 19 and the 9th valve 18 and enter in gas exhausting pipeline 22, another part gas enters in inverse put gas surge tank 23; When adsorption tower enter reverse bleed off pressure three condition time, the gas in this adsorption tower enters in carbon dioxide compression systems 27 by carbon dioxide buffer tank 26; When adsorption tower enters evacuated, start the first vavuum pump 24, make the gas in this adsorption tower enter in exhaust surge tank 25; Described inverse put gas surge tank 23 enters in carbon dioxide compression systems 27 with the gas in exhaust surge tank 25 by carbon dioxide buffer tank 26;

Step 3: the unstripped gas in above-mentioned steps two is discharging semi-finished product gas in first workshop section's adsorption tower group 2 gas outlet after above-mentioned running status, a semi-finished product gas part is made to enter in first workshop section's adsorption tower group 2 by regulating the second three-way valve 20, another part semi-finished product gas enters in semi-finished product surge tank 3, enter the end inflation use of semi-finished product gas as adsorption tower in first workshop section's adsorption tower group 2 of first workshop section's adsorption tower group 2, the semi-finished product gas wherein entered in semi-finished product surge tank 3 enters in second workshop section's adsorption tower group 4 with stable flow pressure 2.15MPa after semi-finished product surge tank 3, second workshop section's adsorption tower group 4 is made up of 24 adsorption tower parallel connections, wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, in 24 cycles, the state of first half section 24 adsorption towers of second round is followed successively by: absorption, absorption, one all rises, three all rise, five all rise, seven all rise, nine all rise, vacuumize, vacuumize, vacuumize, vacuumize, vacuumize, vacuumize, reversely bleed off pressure one, ten all fall, eight all fall, six all fall, four all fall, two all fall, along putting one, absorption, absorption, absorption, absorption,

Step 4: the semi-finished product gas in step 3 is after second workshop section's adsorption tower group 4, the gas of second workshop section's adsorption tower group 4 gas outlet to be carbon dioxide content be 1% purified gas, a part for described purified gas enters in high-pressure unit 8 by purified gas surge tank 7, another part of purified gas is connected with second workshop section's adsorption tower group 4 by pipeline by purified gas surge tank 7, and the purified gas in purified gas surge tank 7 is used as the inflation at end of adsorption tower in second workshop section's adsorption tower group 4.

Embodiment 4

When needs process tolerance is 158400Nm ³unstripped gas time:

Step 2: make step one remove the unstripped gas after moisture through first workshop section's adsorption tower group 2, described first workshop section's adsorption tower group 2 is made up of 24 adsorption tower parallel connections, wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, in 24 cycles, the state of second half section 24 adsorption towers of second round is followed successively by: absorption, absorption, fill eventually, one all rises, three all rise, five all rise, seven all rise, nine all rise, find time, find time, find time, find time, find time, find time, reversely bleed off pressure two, along putting, eight all fall, six all fall, four all fall, two all fall, absorption, absorption, absorption, absorption,

Step 3: the unstripped gas in above-mentioned steps two is discharging semi-finished product gas in first workshop section's adsorption tower group 2 gas outlet after above-mentioned running status, a semi-finished product gas part is made to enter in first workshop section's adsorption tower group 2 by regulating the second three-way valve 20, another part semi-finished product gas enters in semi-finished product surge tank 3, enter the end inflation use of semi-finished product gas as adsorption tower in first workshop section's adsorption tower group 2 of first workshop section's adsorption tower group 2, the semi-finished product gas wherein entered in semi-finished product surge tank 3 enters in second workshop section's adsorption tower group 4 with stable flow pressure 2.3MPa after semi-finished product surge tank 3, second workshop section's adsorption tower group 4 is made up of 24 adsorption tower parallel connections, wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, in 24 cycles, the state of second half section 24 adsorption towers of second round is followed successively by: absorption, absorption, fill eventually, two all rise, four all rise, six all rise, eight all rise, ten all rise, vacuumize, vacuumize, vacuumize, vacuumize, vacuumize, vacuumize, reversely bleed off pressure two, along putting two, nine all fall, seven all fall, five all fall, three all fall, one all falls, absorption, absorption, absorption, absorption,

Step 4: the semi-finished product gas in step 3 is after second workshop section's adsorption tower group 4, the gas of second workshop section's adsorption tower group 4 gas outlet to be carbon dioxide content be 1.2% purified gas, a described purified gas part enters in high-pressure unit 8 by purified gas surge tank 7, another part of purified gas is connected with second workshop section's adsorption tower group 4 by pipeline by purified gas surge tank 7, and the purified gas in purified gas surge tank 7 is used as the inflation at end of adsorption tower in second workshop section's adsorption tower group 4.

Embodiment 5

When needs process tolerance is 169000Nm ³unstripped gas time:

Step 2: make step one remove the unstripped gas after moisture through first workshop section's adsorption tower group 2, described first workshop section's adsorption tower group 2 is made up of 24 adsorption tower parallel connections, wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, in 24 cycles, the state of first half section 24 adsorption towers of period 3 is followed successively by: absorption, absorption, absorption, pre-end fills, two all rise, four all rise, six all rise, eight all rise, pre-loading, find time, find time, find time, find time, find time, reversely bleed off pressure three, reversely bleed off pressure one, nine all fall, seven all fall, five all fall, three all fall, one all falls, absorption, absorption, absorption,

Step 3: the unstripped gas in above-mentioned steps two is discharging semi-finished product gas in first workshop section's adsorption tower group 2 gas outlet after above-mentioned running status, a semi-finished product gas part is made to enter in first workshop section's adsorption tower group 2 by regulating the second three-way valve 20, another part semi-finished product gas enters in semi-finished product surge tank 3, enter the end inflation use of semi-finished product gas as adsorption tower in first workshop section's adsorption tower group 2 of first workshop section's adsorption tower group 2, the semi-finished product gas wherein entered in semi-finished product surge tank 3 enters in second workshop section's adsorption tower group 4 with stable flow pressure 2.0MPa after semi-finished product surge tank 3, second workshop section's adsorption tower group 4 is made up of 24 adsorption tower parallel connections, wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, in 24 cycles, the state of first half section 24 adsorption towers of period 3 is followed successively by: absorption, absorption, absorption, one all rises, three all rise, five all rise, seven all rise, nine all rise, vacuumize, vacuumize, vacuumize, vacuumize, vacuumize, vacuumize, reversely bleed off pressure one, ten all fall, eight all fall, six all fall, four all fall, two all fall, along putting one, absorption, absorption, absorption,

Embodiment 6

When needs process tolerance is 170000Nm ³unstripped gas time:

Step 2: make step one remove the unstripped gas after moisture through first workshop section's adsorption tower group 2, described first workshop section's adsorption tower group 2 is made up of 24 adsorption tower parallel connections, wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, in 24 cycles, the state of second half section 24 adsorption towers of period 3 is followed successively by: absorption, absorption, absorption, fill eventually, one all rises, three all rise, five all rise, seven all rise, nine all rise, find time, find time, find time, find time, find time, find time, reversely bleed off pressure two, along putting, eight all fall, six all fall, four all fall, two all fall, absorption, absorption, absorption,

Step 3: the unstripped gas in above-mentioned steps two is discharging semi-finished product gas in first workshop section's adsorption tower group 2 gas outlet after above-mentioned running status, a semi-finished product gas part is made to enter in first workshop section's adsorption tower group 2 by regulating the second three-way valve 20, another part semi-finished product gas enters in semi-finished product surge tank 3, enter the end inflation use of semi-finished product gas as adsorption tower in first workshop section's adsorption tower group 2 of first workshop section's adsorption tower group 2, the semi-finished product gas wherein entered in semi-finished product surge tank 3 enters in second workshop section's adsorption tower group 4 with stable flow pressure 2.0MPa after semi-finished product surge tank 3, second workshop section's adsorption tower group 4 is made up of 24 adsorption tower parallel connections, wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, in 24 cycles, the state of second half section 24 adsorption towers of period 3 is followed successively by: absorption, absorption, absorption, fill eventually, two all rise, four all rise, six all rise, eight all rise, ten all rise, vacuumize, vacuumize, vacuumize, vacuumize, vacuumize, vacuumize, reversely bleed off pressure two, along putting two, nine all fall, seven all fall, five all fall, three all fall, one all falls, absorption, absorption, absorption,

Embodiment 7

When needs process tolerance is 174000Nm ³unstripped gas time:

Step 2: make step one remove the unstripped gas after moisture through first workshop section's adsorption tower group 2, described first workshop section's adsorption tower group 2 is made up of 24 adsorption tower parallel connections, wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, in 24 cycles, the state of first half section 24 adsorption towers of period 4 is followed successively by: absorption, absorption, absorption, absorption, pre-end fills, two all rise, four all rise, six all rise, eight all rise, pre-loading, find time, find time, find time, find time, find time, reversely bleed off pressure three, reversely bleed off pressure one, nine all fall, seven all fall, five all fall, three all fall, one all falls, absorption, absorption,

Step 3: the unstripped gas in above-mentioned steps two is discharging semi-finished product gas in first workshop section's adsorption tower group 2 gas outlet after above-mentioned running status, a semi-finished product gas part is made to enter in first workshop section's adsorption tower group 2 by regulating the second three-way valve 20, another part semi-finished product gas enters in semi-finished product surge tank 3, enter the end inflation use of semi-finished product gas as adsorption tower in first workshop section's adsorption tower group 2 of first workshop section's adsorption tower group 2, the semi-finished product gas wherein entered in semi-finished product surge tank 3 enters in second workshop section's adsorption tower group 4 with stable flow pressure 2.3MPa after semi-finished product surge tank 3, second workshop section's adsorption tower group 4 is made up of 24 adsorption tower parallel connections, wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, in 24 cycles, the state of first half section 24 adsorption towers of period 4 is followed successively by: absorption, absorption, absorption, absorption, one all rises, three all rise, five all rise, seven all rise, nine all rise, vacuumize, vacuumize, vacuumize, vacuumize, vacuumize, vacuumize, reversely bleed off pressure one, ten all fall, eight all fall, six all fall, four all fall, two all fall, along putting one, absorption, absorption,

Step 4: the semi-finished product gas in step 3 is after second workshop section's adsorption tower group 4, the gas of second workshop section's adsorption tower group 4 gas outlet to be carbon dioxide content be 1.1% purified gas, a described purified gas part enters in high-pressure unit 8 by purified gas surge tank 7, another part of purified gas is connected with second workshop section's adsorption tower group 4 by pipeline by purified gas surge tank 7, and the purified gas in purified gas surge tank 7 is used as the inflation at end of adsorption tower in second workshop section's adsorption tower group 4.

Embodiment 8

When needs process tolerance is 176000Nm ³unstripped gas time:

Step 2: make step one remove the unstripped gas after moisture through first workshop section's adsorption tower group 2, described first workshop section's adsorption tower group 2 is made up of 24 adsorption tower parallel connections, wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, in 24 cycles, the state of second half section 24 adsorption towers of period 4 is followed successively by: absorption, absorption, absorption, absorption, fill eventually, one all rises, three all rise, five all rise, seven all rise, nine all rise, find time, find time, find time, find time, find time, find time, reversely bleed off pressure two, along putting, eight all fall, six all fall, four all fall, two all fall, absorption, absorption,

Step 3: the unstripped gas in above-mentioned steps two is discharging semi-finished product gas in first workshop section's adsorption tower group 2 gas outlet after above-mentioned running status, a semi-finished product gas part is made to enter in first workshop section's adsorption tower group 2 by regulating the second three-way valve 20, another part semi-finished product gas enters in semi-finished product surge tank 3, enter the end inflation use of semi-finished product gas as adsorption tower in first workshop section's adsorption tower group 2 of first workshop section's adsorption tower group 2, the semi-finished product gas wherein entered in semi-finished product surge tank 3 enters in second workshop section's adsorption tower group 4 with stable flow pressure 2.3MPa after semi-finished product surge tank 3, second workshop section's adsorption tower group 4 is made up of 24 adsorption tower parallel connections, wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, in 24 cycles, the state of second half section 24 adsorption towers of period 4 is followed successively by: absorption, absorption, absorption, absorption, fill eventually, two all rise, four all rise, six all rise, eight all rise, ten all rise, vacuumize, vacuumize, vacuumize, vacuumize, vacuumize, vacuumize, reversely bleed off pressure two, along putting two, nine all fall, seven all fall, five all fall, three all fall, one all falls, absorption, absorption,

Step 4: the semi-finished product gas in step 3 is after second workshop section's adsorption tower group 4, the gas of second workshop section's adsorption tower group 4 gas outlet to be carbon dioxide content be 0.9% purified gas, a described purified gas part enters in high-pressure unit 8 by purified gas surge tank 7, another part of purified gas is connected with second workshop section's adsorption tower group 4 by pipeline by purified gas surge tank 7, and the purified gas in purified gas surge tank 7 is used as the inflation at end of adsorption tower in second workshop section's adsorption tower group 4.

Embodiment 9

When needs process tolerance is 180000Nm ³unstripped gas time:

Step 2: make step one remove the unstripped gas after moisture through first workshop section's adsorption tower group 2, described first workshop section's adsorption tower group 2 is made up of 24 adsorption tower parallel connections, wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, in 24 cycles, the state of first half section 24 adsorption towers of period 5 is followed successively by: absorption, absorption, absorption, absorption, absorption, pre-end fills, two all rise, four all rise, six all rise, eight all rise, pre-loading, find time, find time, find time, find time, find time, reversely bleed off pressure three, reversely bleed off pressure one, nine all fall, seven all fall, five all fall, three all fall, one all falls, absorption,

Step 3: the unstripped gas in above-mentioned steps two is discharging semi-finished product gas in first workshop section's adsorption tower group 2 gas outlet after above-mentioned running status, semi-finished product gas is made to enter in semi-finished product surge tank 3 by regulating the second three-way valve 20, the semi-finished product gas entered in semi-finished product surge tank 3 enters in second workshop section's adsorption tower group 4 with stable flow pressure 2.3MPa after semi-finished product surge tank 3, second workshop section's adsorption tower group 4 is made up of 24 adsorption tower parallel connections, wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, in 24 cycles, the state of first half section 24 adsorption towers of period 5 is followed successively by: absorption, absorption, absorption, absorption, absorption, one all rises, three all rise, five all rise, seven all rise, nine all rise, vacuumize, vacuumize, vacuumize, vacuumize, vacuumize, vacuumize, reversely bleed off pressure one, ten all fall, eight all fall, six all fall, four all fall, two all fall, along putting one, absorption,

Step 4: the semi-finished product gas in step 3 is after second workshop section's adsorption tower group 4, the gas of second workshop section's adsorption tower group 4 gas outlet to be carbon dioxide content be 0.2% purified gas, a described purified gas part enters in high-pressure unit 8 by purified gas surge tank 7, another part of purified gas is connected with second workshop section's adsorption tower group 4 by pipeline by purified gas surge tank 7, and the purified gas in purified gas surge tank 7 is used as the inflation at end of adsorption tower in second workshop section's adsorption tower group 4.

Embodiment 10

When needs process tolerance is 185000Nm ³unstripped gas time:

Step 2: make step one remove the unstripped gas after moisture through first workshop section's adsorption tower group 2, described first workshop section's adsorption tower group 2 is made up of 24 adsorption tower parallel connections, wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, in 24 cycles, the state of second half section 24 adsorption towers of period 5 is followed successively by: absorption, absorption, absorption, absorption, absorption, fill eventually, one all rises, three all rise, five all rise, seven all rise, nine all rise, find time, find time, find time, find time, find time, find time, reversely bleed off pressure two, along putting, eight all fall, six all fall, four all fall, two all fall, absorption,

Step 3: the unstripped gas in above-mentioned steps two is discharging semi-finished product gas in first workshop section's adsorption tower group 2 gas outlet after above-mentioned running status, a semi-finished product gas part is made to enter in first workshop section's adsorption tower group 2 by regulating the second three-way valve 20, another part semi-finished product gas enters in semi-finished product surge tank 3, enter the end inflation use of semi-finished product gas as adsorption tower in first workshop section's adsorption tower group 2 of first workshop section's adsorption tower group 2, the semi-finished product gas wherein entered in semi-finished product surge tank 3 enters in second workshop section's adsorption tower group 4 with stable flow pressure 2.1MPa after semi-finished product surge tank 3, second workshop section's adsorption tower group 4 is made up of 24 adsorption tower parallel connections, wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, in 24 cycles, the state of second half section 24 adsorption towers of period 5 is followed successively by: absorption, absorption, absorption, absorption, absorption, fill eventually, two all rise, four all rise, six all rise, eight all rise, ten all rise, vacuumize, vacuumize, vacuumize, vacuumize, vacuumize, vacuumize, reversely bleed off pressure two, along putting two, nine all fall, seven all fall, five all fall, three all fall, one all falls, absorption,

Step 4: the semi-finished product gas in step 3 is after second workshop section's adsorption tower group 4, the gas of second workshop section's adsorption tower group 4 gas outlet to be carbon dioxide content be 1.2% purified gas, a described purified gas part enters high-pressure unit 8 by purified gas surge tank 7, another part of purified gas is connected with second workshop section's adsorption tower group 4 by pipeline by purified gas surge tank 7, and the purified gas in purified gas surge tank 7 is used as the inflation at end of adsorption tower in second workshop section's adsorption tower group 4.

Embodiment 11

When needs process tolerance is 190000Nm ³unstripped gas time:

Step 2: make step one remove the unstripped gas after moisture through first workshop section's adsorption tower group 2, described first workshop section's adsorption tower group 2 is made up of 24 adsorption tower parallel connections, wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, in 24 cycles, the state of first half section 24 adsorption towers of period 6 is followed successively by: absorption, absorption, absorption, absorption, absorption, absorption, pre-end fills, two all rise, four all rise, six all rise, eight all rise, pre-loading, find time, find time, find time, find time, find time, reversely bleed off pressure three, reversely bleed off pressure one, nine all fall, seven all fall, five all fall, three all fall, one all falls,

Step 3: the unstripped gas in above-mentioned steps two is discharging semi-finished product gas in first workshop section's adsorption tower group 2 gas outlet after above-mentioned running status, a semi-finished product gas part is made to enter in first workshop section's adsorption tower group 2 by regulating the second three-way valve 20, another part semi-finished product gas enters in semi-finished product surge tank 3, enter the end inflation use of semi-finished product gas as adsorption tower in first workshop section's adsorption tower group 2 of first workshop section's adsorption tower group 2, the semi-finished product gas wherein entered in semi-finished product surge tank 3 enters in second workshop section's adsorption tower group 4 with stable flow pressure 2.2MPa after semi-finished product surge tank 3, second workshop section's adsorption tower group 4 is made up of 24 adsorption tower parallel connections, wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, in 24 cycles, the state of first half section 24 adsorption towers of period 6 is followed successively by: absorption, absorption, absorption, absorption, absorption, absorption, one all rises, three all rise, five all rise, seven all rise, nine all rise, vacuumize, vacuumize, vacuumize, vacuumize, vacuumize, vacuumize, reversely bleed off pressure one, ten all fall, eight all fall, six all fall, four all fall, two all fall, along putting one,

Embodiment 12

When needs process tolerance is 200000Nm ³unstripped gas time:

Step 2: make step one remove the unstripped gas after moisture through first workshop section's adsorption tower group 2, described first workshop section's adsorption tower group 2 is made up of 24 adsorption tower parallel connections, wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, in 24 cycles, the state of second half section 24 adsorption towers of period 6 is followed successively by: absorption, absorption, absorption, absorption, absorption, absorption, fill eventually, one all rises, three all rise, five all rise, seven all rise, nine all rise, find time, find time, find time, find time, find time, find time, reversely bleed off pressure two, along putting, eight all fall, six all fall, four all fall, two all fall,

Step 3: the unstripped gas in above-mentioned steps two is discharging semi-finished product gas in first workshop section's adsorption tower group 2 gas outlet after above-mentioned running status, a semi-finished product gas part is made to enter in first workshop section's adsorption tower group 2 by regulating the second three-way valve 20, another part semi-finished product gas enters in semi-finished product surge tank 3, enter the end inflation use of semi-finished product gas as adsorption tower in first workshop section's adsorption tower group 2 of first workshop section's adsorption tower group 2, the semi-finished product gas wherein entered in semi-finished product surge tank 3 enters in second workshop section's adsorption tower group 4 with stable flow pressure 2.3MPa after semi-finished product surge tank 3, second workshop section's adsorption tower group 4 is made up of 24 adsorption tower parallel connections, wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, in 24 cycles, the state of second half section 24 adsorption towers of period 6 is followed successively by: absorption, absorption, absorption, absorption, absorption, absorption, fill eventually, two all rise, four all rise, six all rise, eight all rise, ten all rise, vacuumize, vacuumize, vacuumize, vacuumize, vacuumize, vacuumize, reversely bleed off pressure two, along putting two, nine all fall, seven all fall, five all fall, three all fall, one all falls,

As Fig. 3, shown in 4, the present invention does not limit to and above-described embodiment, each adsorption tower in 24 adsorption towers of first workshop section's adsorption tower group 2 in the present invention passes through successively: absorption (A), one all falls (1D), two all fall (2D), three all fall (3D), four all fall (4D), five all fall (5D), six all fall (6D), seven all fall (7D), eight all fall (8D), nine all fall (9D), along putting (PP), reversely bleed off pressure one (D1), reversely bleed off pressure two (D2), reversely bleed off pressure three (D3), find time (V), pre-loading (R), nine all rise (9R), eight all rise (8R), seven all rise (7R), six all rise (6R), five all rise (5R), four all rise (4R), three all rise (3R), two all rise (2R), one all rises (1R), fill (Fr) and whole state of filling (FR) pre-end, each adsorption tower in 24 adsorption towers of second workshop section's adsorption tower group 4 passes through successively: absorption (A), along putting one (PP1), one all falls (1D), two all fall (2D), three all fall (3D), four all fall (4D), five all fall (5D), six all fall (6D), seven all fall (7D), eight all fall (8D), nine all fall (9D), ten all fall (10D), along putting two (PP2), reversely bleed off pressure one (D1), reversely bleed off pressure two (D2), vacuumize (V), ten all rise (10R), nine all rise (9R), eight all rise (8R), seven all rise (7R), six all rise (6R), five all rise (5R), four all rise (4R), three all rise (3R), two all rise (2R), one all rises (1R) and fills the state of (FR) eventually.In the present invention, the duty of first workshop section's adsorption tower group 2 and second workshop section's adsorption tower group 4 can need the time sequence status periodic duty of process according to embodiment 1 to embodiment 12 and above-mentioned each adsorption tower.All valves in the present invention and three-way valve all can adopt Artificial Control or conputer controlled two kinds of modes.

The principle of the invention mainly utilizes adsorbent under adsorptive pressure, and adsorbent is CO absorption selectively ₂, automatically take off under low pressure and analyse CO ₂principle, realize CO ₂remove, thus realize the CO in unstripped gas ₂remove the object reaching Purge gas.Adsorbent in the present invention is: activated alumina, silica gel or active carbon.

Operation principle of the present invention is: unstripped gas is by there being first workshop section's adsorption tower group 2, CO of adsorbent ₂absorbed, remaining gas continues to walk back, and this process is step for some adsorption towers, by the CO adsorbed ₂in also containing a small amount of H ₂and N ₂, so changed by a series of pressure, middle impure CO ₂be recovered utilization, purer CO ₂remove urea synthesis; When entering in second workshop section's adsorption tower group 4 gas containing a small amount of CO ₂, after these gases enter second workshop section's adsorption tower group 4, same CO ₂absorbed, this part gas is also changed by a series of pressure, and the gas effect of middle formation heterogeneity is variant; Gas in purified gas surge tank 7 is H completely ₂and N ₂continue to walk back, remove synthetic ammonia.CO is consisted predominantly of in described unstripped gas ₂, H ₂and N ₂.

Claims

1. a pressure-changeable adsorption decarbonization device, comprise the separator (1) be connected with unstripped gas pipeline, it is characterized in that: separator (1) is connected with first workshop section's adsorption tower group (2) air inlet respectively by pipeline, the gas outlet of first workshop section's adsorption tower group (2) is connected with second workshop section's adsorption tower group (4) air inlet by semi-finished product surge tank (3), and the gas outlet of second workshop section's adsorption tower group (4) is connected with high-pressure unit (8) with purified gas surge tank (7) successively by pipeline, described first workshop section's adsorption tower group (2) is 24 adsorption tower parallel connections, described second workshop section's adsorption tower group (4) is 24 adsorption tower parallel connections, described first workshop section's adsorption tower group (2) respectively with gas recovery system (21), gas exhausting pipeline (22), inverse put gas surge tank (23), exhaust surge tank (25), carbon dioxide buffer tank (26) is connected, inverse put gas surge tank (23) is connected with carbon dioxide buffer tank (26) respectively by pipeline with exhaust surge tank (25), carbon dioxide buffer tank (26) is connected with carbon dioxide compression systems (27), the first three-way valve (19) is provided with between first workshop section's adsorption tower group (2) and inverse put gas surge tank (23), 3rd end of the first three-way valve (19) is connected with gas exhausting pipeline (22) by the 9th valve (18), between first described workshop section's adsorption tower group (2) and exhaust surge tank (25), the first vavuum pump (24) is installed, the first valve (10) is provided with between separator (1) and first workshop section's adsorption tower group (2) air inlet, pipeline between the gas outlet of first workshop section's adsorption tower group (2) and semi-finished product surge tank (3) is provided with the second three-way valve (20), the first end of the second three-way valve (20) is connected with the gas outlet of first workshop section's adsorption tower group (2), pipeline between second end of the second three-way valve (20) and semi-finished product surge tank (3) is provided with the second valve (11), second three-way valve (20) is connected with first workshop section's adsorption tower group (2), the 3rd valve (12) is provided with between semi-finished product surge tank (3) and second workshop section's adsorption tower group (4), described second workshop section's adsorption tower group (4) by respectively with boosting gas surge tank (6), be connected with blowing-out gas burner (28) along venting surge tank (5), boosting gas surge tank (6) is connected with first workshop section's adsorption tower group (2) respectively with along venting surge tank (5), the tenth valve (9) is provided with between second workshop section's adsorption tower group (4) and blowing-out gas burner (28), the second vavuum pump (29) is provided with between described tenth valve (9) and second workshop section's adsorption tower group (4), be provided with the 6th valve (15) between described second workshop section's adsorption tower group (4) and purified gas surge tank (7), described purified gas surge tank (7) is connected with second workshop section's adsorption tower group (4) by pipeline.

2. pressure-changeable adsorption decarbonization device according to claim 1, it is characterized in that: between described second workshop section's adsorption tower group (4) and boosting gas surge tank (6), be provided with the 5th valve (14), between boosting gas surge tank (6) and first workshop section's adsorption tower group (2), be provided with the 8th valve (17); Described second workshop section's adsorption tower group (4) and suitable venting between surge tank (5) are provided with the 4th valve (13), are provided with the 7th valve (16) along between venting surge tank (5) and first workshop section's adsorption tower group (2).

3. a pressure varying adsorption decarburization process, is characterized in that: comprise the steps:

Step one: make unstripped gas remove the moisture in unstripped gas through separator (1);

Step 2: make step one remove the unstripped gas after moisture through first workshop section's adsorption tower group (2), described first workshop section's adsorption tower group (2) is made up of 24 adsorption tower parallel connections, wherein each adsorption tower is successively through 24 cycles, each adsorption tower passes through within 24 cycles: absorption, one all falls, two all fall, three all fall, four all fall, five all fall, six all fall, seven all fall, eight all fall, nine all fall, along putting, reversely bleed off pressure one, reversely bleed off pressure two, reversely bleed off pressure three, find time, pre-loading, nine all rise, eight all rise, seven all rise, six all rise, five all rise, four all rise, three all rise, two all rise, one all rises, the state of filling pre-end and filling eventually, above-mentioned 24 cycles are a circulation,

In 24 adsorption towers of above-mentioned first workshop section's adsorption tower group (2), when adsorption tower enters along when putting state, the gas in this adsorption tower enters in gas recovery system (21); When adsorption tower enter reverse bleed off pressure a state time, the gas in this adsorption tower enters in gas exhausting pipeline (22); When adsorption tower enter reverse bleed off pressure two-state time, make the gas in this adsorption tower enter in gas exhausting pipeline (22) or inverse put gas surge tank (23) by regulating the first three-way valve (19) and the 9th valve (18); When adsorption tower enter reverse bleed off pressure three condition time, the gas in this adsorption tower enters in carbon dioxide compression systems (27) by carbon dioxide buffer tank (26); When adsorption tower enters evacuated, start the first vavuum pump (24), make the gas in this adsorption tower enter in exhaust surge tank (25); Described inverse put gas surge tank (23) enters in carbon dioxide compression systems (27) with the gas in exhaust surge tank (25) by carbon dioxide buffer tank (26);

Step 3: the unstripped gas in above-mentioned steps two is discharging semi-finished product gas in the first workshop section adsorption tower group (2) gas outlet after above-mentioned running status, semi-finished product gas is made to enter in first workshop section's adsorption tower group (2) or semi-finished product surge tank (3) by regulating the second three-way valve (20), enter the end inflation use of semi-finished product gas as adsorption tower in first workshop section's adsorption tower group (2) of first workshop section's adsorption tower group (2), the semi-finished product gas wherein entered in semi-finished product surge tank (3) enters in second workshop section's adsorption tower group (4) with stable flow pressure 2.0MPa-2.3MPa after semi-finished product surge tank (3), second workshop section's adsorption tower group (4) is made up of 24 adsorption tower parallel connections, wherein each adsorption tower is successively through 24 cycles, each adsorption tower passes through absorption within 24 cycles, along putting one, one all falls, two all fall, three all fall, four all fall, five all fall, six all fall, seven all fall, eight all fall, nine all fall, ten all fall, along putting two, reversely bleed off pressure one, reversely bleed off pressure two, vacuumize, ten all rise, nine all rise, eight all rise, seven all rise, six all rise, five all rise, four all rise, three all rise, two all rise, one all rises, the state of filling eventually, above-mentioned 24 cycles are a circulation,

In 24 adsorption towers of above-mentioned second workshop section's adsorption tower group (4), when adsorption tower enters along when putting a state, gas in this adsorption tower enters in first workshop section's adsorption tower group (2) by boosting gas surge tank (6), pre-end as first workshop section's adsorption tower group (2) interior adsorption tower inflates use, when adsorption tower enter reverse bleed off pressure a state time, gas in this adsorption tower is by entering in first workshop section's adsorption tower group (2) along venting surge tank (5), pre-loading gas as first workshop section's adsorption tower group (2) interior adsorption tower uses, when adsorption tower enter reverse bleed off pressure two or vacuumize state time, gas in this adsorption tower is by blowing-out gas burner (28) burning,

Step 4: the semi-finished product gas in step 3 is after second workshop section's adsorption tower group (4), the gas of the second workshop section adsorption tower group (4) gas outlet is the purified gas of carbon dioxide content≤1.2%, described purified gas enters in high-pressure unit (8) by purified gas surge tank (7), purified gas surge tank (7) is connected with second workshop section's adsorption tower group (4) by pipeline, and the purified gas in purified gas surge tank (7) is used as the inflation at end of adsorption tower in second workshop section's adsorption tower group (4).