CN103223288A

CN103223288A - Pressure swing adsorption decarbonization device and process

Info

Publication number: CN103223288A
Application number: CN2013101175583A
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: 2013-07-31
Anticipated expiration: 2033-04-08
Also published as: CN103223288B

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 swing adsorption decarbonization device and technology

Technical field

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

Background technology

The PSA Design of device depends on the CO of purified gas requirement ₂Percentage, Gao Zeke with many recovery gas, accomplishes that emptying pressure is low all adding in the pressure design as far as possible more, gas loss is little.How to reduce SR, improve the emphasis that gas reclaiming rate becomes the pressure swing adsorption decarbonization technical research.Existing pressure swing adsorption decarbonization device is designed to one section 20 adsorption tower, two sections 20 adsorption towers, and the operation sequential is 20-5-8/v4, and two sections is 20-5-9/v4, and processing tolerance is 180000Nm ³, purified gas CO ₂Be 0.5%,, find when full machine is produced, because load is bigger, in order to make purified gas CO by the long-time running of the said equipment ₂Be controlled in the index, make each section adsorption cycle reach the shortest, the emptying number of times increases, and the gas loss rate increases.

Summary of the invention

The objective of the invention is to overcome defective of the prior art and provide a kind of raising to handle the load and the rate of recovery, realize the pressure swing adsorption decarbonization device and the technology of economize on electricity consumption reduction.

The object of the present invention is achieved like this: comprise the separator that is connected with the unstripped gas pipeline, separator links to each other with first workshop section's adsorption tower group air inlet respectively by pipeline, the gas outlet of first workshop section's adsorption tower group links to each other with second workshop section's adsorption tower group air inlet by the semi-finished product surge tank, and the gas outlet of second workshop section's adsorption tower group links to each other with high-pressure unit with the 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, the gas exhausting pipeline, contrary venting surge tank, the exhaust surge tank, the carbon dioxide buffer jar links to each other, contrary venting surge tank links to each other with the carbon dioxide buffer jar by pipeline respectively with the exhaust surge tank, the carbon dioxide buffer jar links to each other with the carbon dioxide compressibility, be provided with first three-way valve between first workshop section's adsorption tower group and the contrary venting surge tank, the 3rd end of first three-way valve links to each other with the gas exhausting pipeline by the 9th valve, between described first workshop section's adsorption tower group and the exhaust surge tank first vavuum pump is installed; Be provided with first valve between separator and the first workshop section's adsorption tower group air inlet, the gas outlet of first workshop section's adsorption tower group and the pipeline between the semi-finished product surge tank are provided with second three-way valve, first end of second three-way valve links to each other with the gas outlet of first workshop section's adsorption tower group, second end of second three-way valve and the pipeline between the semi-finished product surge tank are provided with second valve, second three-way valve links to each other with first workshop section's adsorption tower group, be provided with the 3rd valve between semi-finished product surge tank and the second workshop section's adsorption tower group, described second workshop section's adsorption tower group by respectively with the gas surge tank that boosts, link to each other with the blowing-out gas burner along the venting surge tank, the gas surge tank that boosts links to each other with first workshop section's adsorption tower group respectively with suitable venting surge tank, be provided with the tenth valve between second workshop section's adsorption tower group and the blowing-out gas burner, be provided with second vavuum pump between described the tenth valve and the second workshop section's adsorption tower group; Be provided with the 6th valve between described second workshop section's adsorption tower group and the purified gas surge tank, described purified gas surge tank links to each other with second workshop section's adsorption tower group by pipeline.

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

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

Step 1: make unstripped gas through the moisture in the separator removal unstripped gas;

Step 2: make step 1 remove unstripped gas behind the moisture through first workshop section's adsorption tower group, described first workshop section's adsorption tower group is made of 24 adsorption tower parallel connections, and wherein each adsorption tower is successively through 24 cycles, through absorption, one all falls each adsorption tower in 24 cycles, and two all fall, three all fall, and four all fall, and five all fall, six all fall, and seven all fall, and eight all fall, nine all fall, and along putting, reverse putting presses one, reverse putting presses two, and reverse putting presses three, finds time, pre-loading, nine all rise, and eight all rise, seven all rise, and six all rise, and five all rise, four all rise, and three all rise, and two all rise, one all rises, the pre-state that fills and fill eventually eventually; Above-mentioned is the circulations of 24 cycles;

In 24 adsorption towers of above-mentioned first workshop section's adsorption tower group, when adsorption tower enters when putting state, the gas in this adsorption tower enters in the gas recovery system; When adsorption tower enters reverse putting when pressing a state, the gas in this adsorption tower enters in the gas exhausting pipeline; When adsorption tower enters reverse putting when pressing two-state, can the gas in this adsorption tower be entered in gas exhausting pipeline or the contrary venting surge tank by regulating first three-way valve and the 9th valve; When adsorption tower enters reverse putting when pressing three condition, the gas in this adsorption tower enters in the carbon dioxide compressibility by the carbon dioxide buffer jar; When adsorption tower enters evacuated, start first vavuum pump, the gas in this adsorption tower is entered in the exhaust surge tank; Gas in described contrary venting surge tank and the exhaust surge tank enters in the carbon dioxide compressibility by the carbon dioxide buffer jar;

Step 3: the unstripped gas in the above-mentioned steps two is discharged semi-finished product gas in the first workshop section adsorption tower group gas outlet after the above-mentioned running status of process, by regulating second three-way valve semi-finished product gas is entered in first workshop section's adsorption tower group or the semi-finished product surge tank, the semi-finished product gas that enters first workshop section's adsorption tower group uses as the inflation eventually of adsorption tower in first workshop section's adsorption tower group, the semi-finished product gas that wherein enters in the semi-finished product surge tank enters in second workshop section's adsorption tower group with stable flow rate pressure 2.0MPa-2.3MPa behind the semi-finished product surge tank, second workshop section's adsorption tower group is made of 24 adsorption tower parallel connections, wherein each adsorption tower is successively through 24 cycles, each adsorption tower is process absorption in 24 cycles, along putting one, one all falls, and two all fall, and three all fall, four all fall, five all fall, and six all fall, and seven all fall, eight all fall, nine all fall, and ten all fall, along putting two, reverse putting presses one, reverse putting presses two, vacuumizes, and ten all rise, nine all rise, eight all rise, and seven all rise, and six all rise, five all rise, four all rise, and three all rise, and two all rise, one all rises the state that fills eventually; Above-mentioned is the circulations of 24 cycles;

In 24 adsorption towers of above-mentioned second workshop section's adsorption tower group, when adsorption tower enters when putting a state, gas in this adsorption tower enters in first workshop section's adsorption tower group by the gas surge tank that boosts, pre-inflation eventually as adsorption tower in first workshop section's adsorption tower group is used, when adsorption tower enters reverse putting when pressing a state, gas in this adsorption tower is by entering in first workshop section's adsorption tower group along the venting surge tank, pre-loading gas as adsorption tower in first workshop section's adsorption tower group uses, when entering reverse putting, adsorption tower presses two or when vacuumizing state, the gas in this adsorption tower is by the burning of blowing-out gas burner;

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

The present invention includes increases adsorption tower and optimizes sequential control system, comprises increasing by 8 adsorption towers, and can be implemented in each half cycle of operation all has 6 adsorption tower absorption, prolongs adsorption time; First workshop section's adsorption tower group and second workshop section's adsorption tower group respectively increase once all pressures again on technology, improve the nitrogen hydrogen purity, thereby reduce exhausted air quantity.Optimize timing unit: operation sequential of the present invention is 24-6-9R/V for one section ₅, two sections is 24-6-10/V ₅, processing tolerance is 200000m ³/ h, purified gas CO ₂Content is 0.8-1.2%, has reduced the decarbonization system resistance, drops to 38Kpa by 44Kpa, can make the power consumption decline 3Kwh of system, simultaneously owing to prolonged adsorption time.Adopt the six towers adsorbed gas simultaneously rate of recovery to improve 0.97% than original technology average recovery rate, adsorption time has prolonged 12%; Purified gas tolerance is pressed 105000Nm ³/ h calculates, and reclaims available gas 1000Nm more ³/ h makes synthetic ammonia output rising 0.33T/h (by ton synthetic ammonia folding purified gas 3000m ³), annual by effectively producing 350 days 1.06 tons of calculating of ton ammonia consumption coal, can economize on coal the whole year 2938.32 tons (1100 yuan of meters of ton coal), 323.2152 ten thousand yuan of direct economic benefits.

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

Description of drawings

Fig. 1 is a structural representation of the present invention.

Fig. 2 is a flow diagram of the present invention.

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

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

The specific embodiment

Shown in Fig. 1,2,3,4, the present invention includes the separator 1 that is connected with the unstripped gas pipeline, separator 1 links to each other with first workshop section's adsorption tower group 2 air inlets respectively by pipeline, the gas outlet of first workshop section's adsorption tower group 2 links to each other with second workshop section's adsorption tower group 4 air inlets by semi-finished product surge tank 3, and the gas outlet of second workshop section's adsorption tower group 4 links to each other 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, contrary venting surge tank 23, exhaust surge tank 25, carbon dioxide buffer jar 26 links to each other, contrary venting surge tank 23 links to each other with carbon dioxide buffer jar 26 by pipeline respectively with exhaust surge tank 25, carbon dioxide buffer jar 26 links to each other with carbon dioxide compressibility 27, be provided with first three-way valve 19 between first workshop section's adsorption tower group 2 and the contrary venting surge tank 23, the 3rd end of first three-way valve 19 links to each other with gas exhausting pipeline 22 by the 9th valve 18, between described first workshop section's adsorption tower group 2 and the exhaust surge tank 25 first vavuum pump 24 is installed; Be provided with first valve 10 between separator 1 and first workshop section's adsorption tower group 2 air inlets, the gas outlet and the pipeline between the semi-finished product surge tank 3 of first workshop section's adsorption tower group 2 are provided with second three-way valve 20, first end of second three-way valve 20 links to each other with the gas outlet of first workshop section's adsorption tower group 2, second end and the pipeline between the semi-finished product surge tank 3 of second three-way valve 20 are provided with second valve 11, second three-way valve 20 links to each other with first workshop section's adsorption tower group 2, be provided with the 3rd valve 12 between semi-finished product surge tank 3 and the second workshop section's adsorption tower group 4, described second workshop section's adsorption tower group 4 by respectively with the gas surge tank 6 that boosts, link to each other with blowing-out gas burner 28 along venting surge tank 5, the gas surge tank 6 that boosts links to each other with first workshop section's adsorption tower group 2 respectively with suitable venting surge tank 5, be provided with the tenth valve 9 between second workshop section's adsorption tower group 4 and the blowing-out gas burner 28, be provided with second vavuum pump 29 between described the tenth valve 9 and the 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 the purified gas surge tank 7, described purified gas surge tank 7 links to each other with second workshop section's adsorption tower group 4 by pipeline.Described second workshop section's adsorption tower group 4 and boost and be provided with the 5th valve 14 between the gas surge tank 6, boosting is provided with the 8th valve 17 between gas surge tank 6 and the first workshop section's adsorption tower group 2; Be provided with the 4th valve 13 between described second workshop section's adsorption tower group 4 and the suitable venting surge tank 5, along being provided with the 7th valve 16 between venting surge tank 5 and the first workshop section's adsorption tower group 2.

Step 1: the moisture that unstripped gas is removed in the unstripped gas through separator 1;

Step 2: make step 1 remove unstripped gas behind the moisture through first workshop section's adsorption tower group 2, described first workshop section's adsorption tower group 2 is made of 24 adsorption tower parallel connections, and wherein each adsorption tower is successively through 24 cycles, through absorption, one all falls each adsorption tower in 24 cycles, and two all fall, three all fall, and four all fall, and five all fall, six all fall, and seven all fall, and eight all fall, nine all fall, and along putting, reverse putting presses one, reverse putting presses two, and reverse putting presses three, finds time, pre-loading, nine all rise, and eight all rise, seven all rise, and six all rise, and five all rise, four all rise, and three all rise, and two all rise, one all rises, the pre-state that fills and fill eventually eventually; Above-mentioned is the circulations of 24 cycles;

In 24 adsorption towers of above-mentioned first workshop section's adsorption tower group 2, when adsorption tower enters when putting state, the gas in this adsorption tower enters in the gas recovery system 21; When adsorption tower enters reverse putting when pressing a state, the gas in this adsorption tower enters in the gas exhausting pipeline 22; When adsorption tower enters reverse putting when pressing two-state, can the gas in this adsorption tower be entered in gas exhausting pipeline 22 or the contrary venting surge tank 23 by regulating first three-way valve 19 and the 9th valve 18; When adsorption tower enters reverse putting when pressing three condition, the gas in this adsorption tower enters in the carbon dioxide compressibility 27 by carbon dioxide buffer jar 26; When adsorption tower enters evacuated, start first vavuum pump 24, the gas in this adsorption tower is entered in the exhaust surge tank 25; Gas in described contrary venting surge tank 23 and the exhaust surge tank 25 enters in the carbon dioxide compressibility 27 by carbon dioxide buffer jar 26;

Step 3: the unstripped gas in the above-mentioned steps two is discharged semi-finished product gas in first workshop section adsorption tower group 2 gas outlets after the above-mentioned running status of process, by regulating second three-way valve 20 semi-finished product gas is entered in first workshop section's adsorption tower group 2 or the semi-finished product surge tank 3, the semi-finished product gas that enters first workshop section's adsorption tower group 2 uses as the inflation eventually of adsorption tower in first workshop section's adsorption tower group 2, the semi-finished product gas that wherein enters in the semi-finished product surge tank 3 enters in second workshop section's adsorption tower group 4 with stable flow rate pressure 2.0MPa-2.3MPa in semi-finished product surge tank 3 backs, second workshop section's adsorption tower group 4 is made of 24 adsorption tower parallel connections, wherein each adsorption tower is successively through 24 cycles, each adsorption tower is process absorption in 24 cycles, along putting one, one all falls, and two all fall, and three all fall, four all fall, five all fall, and six all fall, and seven all fall, eight all fall, nine all fall, and ten all fall, along putting two, reverse putting presses one, reverse putting presses two, vacuumizes, and ten all rise, nine all rise, eight all rise, and seven all rise, and six all rise, five all rise, four all rise, and three all rise, and two all rise, one all rises the state that fills eventually; Above-mentioned is the circulations of 24 cycles;

In 24 adsorption towers of above-mentioned second workshop section's adsorption tower group 4, when adsorption tower enters when putting a state, gas in this adsorption tower enters in first workshop section's adsorption tower group 2 by the gas surge tank 6 that boosts, pre-inflation eventually as adsorption tower in first workshop section's adsorption tower group 2 is used, when adsorption tower enters reverse putting when pressing a state, 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 entering reverse putting, adsorption tower presses two or when vacuumizing state, the gas in this adsorption tower is by 28 burnings of blowing-out gas burner;

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

Embodiment 1

Handling tolerance when needs is 150700Nm ³Unstripped gas the time:

Step 2: make step 1 remove unstripped gas behind the moisture through first workshop section's adsorption tower group 2, described first workshop section's adsorption tower group 2 is made of 24 adsorption tower parallel connections, and wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, and the state of preceding half of the period 1 section 24 adsorption tower is followed successively by in 24 cycles: absorption, pre-whole filling, two all rise, and four all rise, and six all rise, eight all rise, and pre-loading is found time, find time, find time, find time, find time, reverse putting presses three, and reverse putting presses one, nine all fall, and seven all fall, and five all fall, three all fall, and 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 when putting state, the gas in this adsorption tower enters in the gas recovery system 21; When adsorption tower enters reverse putting when pressing a state, the gas in this adsorption tower enters in the gas exhausting pipeline 22; When adsorption tower enters reverse putting when pressing two-state, can the gas in this adsorption tower be entered in the gas exhausting pipeline 22 by regulating first three-way valve 19 and the 9th valve 18; When adsorption tower enters reverse putting when pressing three condition, the gas in this adsorption tower enters in the carbon dioxide compressibility 27 by carbon dioxide buffer jar 26; When adsorption tower enters evacuated, start first vavuum pump 24, the gas in this adsorption tower is entered in the exhaust surge tank 25; Gas in described contrary venting surge tank 23 and the exhaust surge tank 25 enters in the carbon dioxide compressibility 27 by carbon dioxide buffer jar 26;

Step 3: the unstripped gas in the above-mentioned steps two enters in the semi-finished product surge tank 3 semi-finished product gas through discharging semi-finished product gas in first workshop section adsorption tower group 2 gas outlets after the above-mentioned running status by regulating second three-way valve 20, and the semi-finished product gas that enters in the semi-finished product surge tank 3 enters in second workshop section's adsorption tower group 4 with stable flow rate pressure 2.3MPa in semi-finished product surge tank 3 backs, second workshop section's adsorption tower group 4 is made of 24 adsorption tower parallel connections, and wherein each adsorption tower is successively through 24 cycles, and above-mentioned 24 cycles are a circulation, the state of preceding half of the period 1 section 24 adsorption tower is followed successively by in 24 cycles: absorption, one all rises, and three all rise, and five all rise, seven all rise, nine all rise, and vacuumize, and vacuumize, vacuumize, vacuumize, vacuumize, vacuumize, reverse putting presses one, ten all fall, and eight all fall, and 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 the step 3 through second workshop section's adsorption tower group 4 after, the gas of second workshop section adsorption tower group 4 gas outlets is that carbon dioxide content is 1.2% purified gas, described purified gas enters in the high-pressure unit 8 by purified gas surge tank 7.

Embodiment 2

Handling tolerance when needs is 151000Nm ³Unstripped gas the time:

Step 2: make step 1 remove unstripped gas behind the moisture through first workshop section's adsorption tower group 2, described first workshop section's adsorption tower group 2 is made of 24 adsorption tower parallel connections, and wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, and the state of second half section 24 adsorption towers of period 1 is followed successively by in 24 cycles: absorption, fill eventually, one all rises, and three all rise, and five all rise, seven all rise, and nine all rise, and find time, find time, find time, find time, find time, find time, reverse putting presses two, along putting, eight all fall, and six all fall, four all fall, and 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 when putting state, the gas in this adsorption tower enters in the gas recovery system 21; When adsorption tower enters reverse putting when pressing a state, the gas in this adsorption tower enters in the gas exhausting pipeline 22; When adsorption tower enters reverse putting when pressing two-state, can the gas in this adsorption tower be entered in the contrary venting surge tank 23 by regulating first three-way valve 19 and the 9th valve 18; When adsorption tower enters reverse putting when pressing three condition, the gas in this adsorption tower enters in the carbon dioxide compressibility 27 by carbon dioxide buffer jar 26; When adsorption tower enters evacuated, start first vavuum pump 24, the gas in this adsorption tower is entered in the exhaust surge tank 25; Gas in described contrary venting surge tank 23 and the exhaust surge tank 25 enters in the carbon dioxide compressibility 27 by carbon dioxide buffer jar 26;

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

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

Embodiment 3

Handling tolerance when needs is 158000Nm ³Unstripped gas the time:

Step 2: make step 1 remove unstripped gas behind the moisture through first workshop section's adsorption tower group 2, described first workshop section's adsorption tower group 2 is made of 24 adsorption tower parallel connections, and wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, and the state of preceding half of second round section 24 adsorption tower is followed successively by absorption in 24 cycles, absorption, pre-whole filling, two all rise, and four all rise, six all rise, and eight all rise pre-loading, find time, find time, find time, find time, find time, reverse putting presses three, reverse putting presses one, nine all to fall, and seven all fall, five all fall, and three all fall, and 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 when putting state, the gas in this adsorption tower enters in the gas recovery system 21; When adsorption tower enters reverse putting when pressing a state, the gas in this adsorption tower enters in the gas exhausting pipeline 22; When adsorption tower enters reverse putting when pressing two-state, can make gas in this adsorption tower enter a part to enter in the gas exhausting pipeline 22 by regulating first three-way valve 19 and the 9th valve 18, another part gas enters in the contrary venting surge tank 23; When adsorption tower enters reverse putting when pressing three condition, the gas in this adsorption tower enters in the carbon dioxide compressibility 27 by carbon dioxide buffer jar 26; When adsorption tower enters evacuated, start first vavuum pump 24, the gas in this adsorption tower is entered in the exhaust surge tank 25; Gas in described contrary venting surge tank 23 and the exhaust surge tank 25 enters in the carbon dioxide compressibility 27 by carbon dioxide buffer jar 26;

Step 3: the unstripped gas in the above-mentioned steps two is discharged semi-finished product gas in first workshop section adsorption tower group 2 gas outlets after the above-mentioned running status of process, by regulating second three-way valve 20 a semi-finished product gas part is entered in first workshop section's adsorption tower group 2, another part semi-finished product gas enters in the semi-finished product surge tank 3, the semi-finished product gas that enters first workshop section's adsorption tower group 2 uses as the inflation eventually of adsorption tower in first workshop section's adsorption tower group 2, the semi-finished product gas that wherein enters in the semi-finished product surge tank 3 enters in second workshop section's adsorption tower group 4 with stable flow rate pressure 2.15MPa in semi-finished product surge tank 3 backs, second workshop section's adsorption tower group 4 is made of 24 adsorption tower parallel connections, wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, the state of preceding half of second round section 24 adsorption tower is followed successively by in 24 cycles: absorption, absorption, one all rises, and three all rise, five all rise, seven all rise, and nine all rise, and vacuumize, vacuumize, vacuumize, vacuumize, vacuumize, vacuumize, reverse putting presses one, ten all to fall, and eight all fall, six all fall, four all fall, and two all fall, along putting one, absorption, absorption, absorption, absorption;

Step 4: the semi-finished product gas in the step 3 through second workshop section's adsorption tower group 4 after, the gas of second workshop section adsorption tower group 4 gas outlets is that carbon dioxide content is 1% purified gas, the part of described purified gas enters in the high-pressure unit 8 by purified gas surge tank 7, another part of purified gas is linked to each other with second workshop section's adsorption tower group 4 by pipeline by purified gas surge tank 7, and the purified gas in the purified gas surge tank 7 is used as the inflation eventually of adsorption tower in second workshop section's adsorption tower group 4.

Embodiment 4

Handling tolerance when needs is 158400Nm ³Unstripped gas the time:

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

Step 3: the unstripped gas in the above-mentioned steps two is discharged semi-finished product gas in first workshop section adsorption tower group 2 gas outlets after the above-mentioned running status of process, by regulating second three-way valve 20 a semi-finished product gas part is entered in first workshop section's adsorption tower group 2, another part semi-finished product gas enters in the semi-finished product surge tank 3, the semi-finished product gas that enters first workshop section's adsorption tower group 2 uses as the inflation eventually of adsorption tower in first workshop section's adsorption tower group 2, the semi-finished product gas that wherein enters in the semi-finished product surge tank 3 enters in second workshop section's adsorption tower group 4 with stable flow rate pressure 2.3MPa in semi-finished product surge tank 3 backs, second workshop section's adsorption tower group 4 is made of 24 adsorption tower parallel connections, wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, the state of second half section 24 adsorption towers of second round is followed successively by in 24 cycles: absorption, and absorption is filled eventually, two all rise, four all rise, and six all rise, and eight all rise, ten all rise, vacuumize, vacuumize, vacuumize, vacuumize, vacuumize, vacuumize, reverse putting presses two, along putting two, nine all fall, and seven all fall, and five all fall, three all fall, one all falls, absorption, absorption, absorption, absorption;

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

Embodiment 5

Handling tolerance when needs is 169000Nm ³Unstripped gas the time:

Step 2: make step 1 remove unstripped gas behind the moisture through first workshop section's adsorption tower group 2, described first workshop section's adsorption tower group 2 is made of 24 adsorption tower parallel connections, and wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, and the state of preceding half of the period 3 section 24 adsorption tower is followed successively by in 24 cycles: absorption, absorption, absorption, pre-whole filling, two all rise, four all rise, and six all rise, and eight all rise, pre-loading is found time, and finds time, find time, find time, find time, reverse putting presses three, and reverse putting presses one, nine all to fall, seven all fall, and five all fall, and three all fall, one all falls, absorption, absorption, absorption;

Step 3: the unstripped gas in the above-mentioned steps two is discharged semi-finished product gas in first workshop section adsorption tower group 2 gas outlets after the above-mentioned running status of process, by regulating second three-way valve 20 a semi-finished product gas part is entered in first workshop section's adsorption tower group 2, another part semi-finished product gas enters in the semi-finished product surge tank 3, the semi-finished product gas that enters first workshop section's adsorption tower group 2 uses as the inflation eventually of adsorption tower in first workshop section's adsorption tower group 2, the semi-finished product gas that wherein enters in the semi-finished product surge tank 3 enters in second workshop section's adsorption tower group 4 with stable flow rate pressure 2.0MPa in semi-finished product surge tank 3 backs, second workshop section's adsorption tower group 4 is made of 24 adsorption tower parallel connections, wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, the state of preceding half of the period 3 section 24 adsorption tower is followed successively by in 24 cycles: absorption, absorption, absorption, one all rises, three all rise, five all rise, and seven all rise, and nine all rise, vacuumize, vacuumize, vacuumize, vacuumize, vacuumize, vacuumize, reverse putting presses one, ten all to fall, eight all fall, six all fall, and four all fall, and two all fall, along putting one, absorption, absorption, absorption;

Embodiment 6

Handling tolerance when needs is 170000Nm ³Unstripped gas the time:

Step 2: make step 1 remove unstripped gas behind the moisture through first workshop section's adsorption tower group 2, described first workshop section's adsorption tower group 2 is made of 24 adsorption tower parallel connections, and wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, and the state of second half section 24 adsorption towers of period 3 is followed successively by in 24 cycles: absorption, absorption, absorption is filled eventually, and one all rises, three all rise, and five all rise, and seven all rise, nine all rise, and find time, and find time, find time, find time, find time, find time, reverse putting presses two, along putting, eight all fall, and six all fall, and four all fall, two all fall, absorption, absorption, absorption;

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

Embodiment 7

Handling tolerance when needs is 174000Nm ³Unstripped gas the time:

Step 2: make step 1 remove unstripped gas behind the moisture through first workshop section's adsorption tower group 2, described first workshop section's adsorption tower group 2 is made of 24 adsorption tower parallel connections, and wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, and the state of preceding half of the period 4 section 24 adsorption tower is followed successively by in 24 cycles: absorption, absorption, absorption, absorption, pre-whole filling, two all rise, and four all rise, and six all rise, eight all rise, and pre-loading is found time, find time, find time, find time, find time, reverse putting presses three, and reverse putting presses one, nine all fall, and seven all fall, and five all fall, three all fall, one all falls, absorption, absorption;

Step 3: the unstripped gas in the above-mentioned steps two is discharged semi-finished product gas in first workshop section adsorption tower group 2 gas outlets after the above-mentioned running status of process, by regulating second three-way valve 20 a semi-finished product gas part is entered in first workshop section's adsorption tower group 2, another part semi-finished product gas enters in the semi-finished product surge tank 3, the semi-finished product gas that enters first workshop section's adsorption tower group 2 uses as the inflation eventually of adsorption tower in first workshop section's adsorption tower group 2, the semi-finished product gas that wherein enters in the semi-finished product surge tank 3 enters in second workshop section's adsorption tower group 4 with stable flow rate pressure 2.3MPa in semi-finished product surge tank 3 backs, second workshop section's adsorption tower group 4 is made of 24 adsorption tower parallel connections, wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, the state of preceding half of the period 4 section 24 adsorption tower is followed successively by in 24 cycles: absorption, absorption, absorption, absorption, one all rises, three all rise, and five all rise, and seven all rise, nine all rise, vacuumize, vacuumize, vacuumize, vacuumize, vacuumize, vacuumize, reverse putting presses one, ten all fall, eight all fall, and six all fall, and four all fall, two all fall, along putting one, absorption, absorption;

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

Embodiment 8

Handling tolerance when needs is 176000Nm ³Unstripped gas the time:

Step 2: make step 1 remove unstripped gas behind the moisture through first workshop section's adsorption tower group 2, described first workshop section's adsorption tower group 2 is made of 24 adsorption tower parallel connections, and wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, and the state of second half section 24 adsorption towers of period 4 is followed successively by in 24 cycles: absorption, absorption, absorption, absorption is filled eventually, one all rises, and three all rise, and five all rise, seven all rise, and nine all rise, and find time, find time, find time, find time, find time, find time, reverse putting presses two, along putting, eight all fall, and six all fall, four all fall, two all fall, absorption, absorption;

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

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

Embodiment 9

Handling tolerance when needs is 180000Nm ³Unstripped gas the time:

Step 2: make step 1 remove unstripped gas behind the moisture through first workshop section's adsorption tower group 2, described first workshop section's adsorption tower group 2 is made of 24 adsorption tower parallel connections, and wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, and the state of preceding half of the period 5 section 24 adsorption tower is followed successively by in 24 cycles: absorption, absorption, absorption, absorption, absorption, pre-whole filling, two all rise, and four all rise, six all rise, and eight all rise pre-loading, find time, find time, find time, find time, find time, reverse putting presses three, reverse putting presses one, nine all to fall, and seven all fall, five all fall, three all fall, and one all falls, absorption;

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

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

Embodiment 10

Handling tolerance when needs is 185000Nm ³Unstripped gas the time:

Step 2: make step 1 remove unstripped gas behind the moisture through first workshop section's adsorption tower group 2, described first workshop section's adsorption tower group 2 is made of 24 adsorption tower parallel connections, and wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, and the state of second half section 24 adsorption towers of period 5 is followed successively by in 24 cycles: absorption, absorption, absorption, absorption, absorption, fill eventually, one all rises, and three all rise, five all rise, and seven all rise, and nine all rise, find time, find time, find time, find time, find time, find time, reverse putting presses two, and along putting, eight all fall, six all fall, four all fall, and two all fall, absorption;

Step 3: the unstripped gas in the above-mentioned steps two is discharged semi-finished product gas in first workshop section adsorption tower group 2 gas outlets after the above-mentioned running status of process, by regulating second three-way valve 20 a semi-finished product gas part is entered in first workshop section's adsorption tower group 2, another part semi-finished product gas enters in the semi-finished product surge tank 3, the semi-finished product gas that enters first workshop section's adsorption tower group 2 uses as the inflation eventually of adsorption tower in first workshop section's adsorption tower group 2, the semi-finished product gas that wherein enters in the semi-finished product surge tank 3 enters in second workshop section's adsorption tower group 4 with stable flow rate pressure 2.1MPa in semi-finished product surge tank 3 backs, second workshop section's adsorption tower group 4 is made of 24 adsorption tower parallel connections, wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, the state of second half section 24 adsorption towers of period 5 is followed successively by in 24 cycles: absorption, absorption, absorption, absorption, absorption is filled eventually, and two all rise, four all rise, six all rise, and eight all rise, and ten all rise, vacuumize, vacuumize, vacuumize, vacuumize, vacuumize, vacuumize, reverse putting presses two, along putting two, nine all fall, seven all fall, and five all fall, and three all fall, one all falls, absorption;

Step 4: the semi-finished product gas in the step 3 through second workshop section's adsorption tower group 4 after, the gas of second workshop section adsorption tower group 4 gas outlets is that carbon dioxide content is 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 linked to each other with second workshop section's adsorption tower group 4 by pipeline by purified gas surge tank 7, and the purified gas in the purified gas surge tank 7 is used as the inflation eventually of adsorption tower in second workshop section's adsorption tower group 4.

Embodiment 11

Handling tolerance when needs is 190000Nm ³Unstripped gas the time:

Step 2: make step 1 remove unstripped gas behind the moisture through first workshop section's adsorption tower group 2, described first workshop section's adsorption tower group 2 is made of 24 adsorption tower parallel connections, and wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, and the state of preceding half of the period 6 section 24 adsorption tower is followed successively by in 24 cycles: absorption, absorption, absorption, absorption, absorption, absorption, pre-whole filling, two all rise, four all rise, and six all rise, and eight all rise, pre-loading is found time, and finds time, find time, find time, find time, reverse putting presses three, and reverse putting presses one, nine all to fall, seven all fall, five all fall, and three all fall, and one all falls;

Step 3: the unstripped gas in the above-mentioned steps two is discharged semi-finished product gas in first workshop section adsorption tower group 2 gas outlets after the above-mentioned running status of process, by regulating second three-way valve 20 a semi-finished product gas part is entered in first workshop section's adsorption tower group 2, another part semi-finished product gas enters in the semi-finished product surge tank 3, the semi-finished product gas that enters first workshop section's adsorption tower group 2 uses as the inflation eventually of adsorption tower in first workshop section's adsorption tower group 2, the semi-finished product gas that wherein enters in the semi-finished product surge tank 3 enters in second workshop section's adsorption tower group 4 with stable flow rate pressure 2.2MPa in semi-finished product surge tank 3 backs, second workshop section's adsorption tower group 4 is made of 24 adsorption tower parallel connections, wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, the state of preceding half of the period 6 section 24 adsorption tower is followed successively by in 24 cycles: absorption, absorption, absorption, absorption, absorption, absorption, one all rises, and three all rise, five all rise, seven all rise, and nine all rise, and vacuumize, vacuumize, vacuumize, vacuumize, vacuumize, vacuumize, reverse putting presses one, ten all to fall, and eight all fall, six all fall, four all fall, and two all fall, along putting one;

Embodiment 12

Handling tolerance when needs is 200000Nm ³Unstripped gas the time:

Step 2: make step 1 remove unstripped gas behind the moisture through first workshop section's adsorption tower group 2, described first workshop section's adsorption tower group 2 is made of 24 adsorption tower parallel connections, and wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, and the state of second half section 24 adsorption towers of period 6 is followed successively by in 24 cycles: absorption, absorption, absorption, absorption, absorption, absorption is filled eventually, and one all rises, three all rise, and five all rise, and seven all rise, nine all rise, and find time, and find time, find time, find time, find time, find time, reverse putting presses two, along putting, eight all fall, six all fall, and four all fall, and two all fall;

Step 3: the unstripped gas in the above-mentioned steps two is discharged semi-finished product gas in first workshop section adsorption tower group 2 gas outlets after the above-mentioned running status of process, by regulating second three-way valve 20 a semi-finished product gas part is entered in first workshop section's adsorption tower group 2, another part semi-finished product gas enters in the semi-finished product surge tank 3, the semi-finished product gas that enters first workshop section's adsorption tower group 2 uses as the inflation eventually of adsorption tower in first workshop section's adsorption tower group 2, the semi-finished product gas that wherein enters in the semi-finished product surge tank 3 enters in second workshop section's adsorption tower group 4 with stable flow rate pressure 2.3MPa in semi-finished product surge tank 3 backs, second workshop section's adsorption tower group 4 is made of 24 adsorption tower parallel connections, wherein each adsorption tower is successively through 24 cycles, above-mentioned 24 cycles are a circulation, the state of second half section 24 adsorption towers of period 6 is followed successively by in 24 cycles: absorption, absorption, absorption, absorption, absorption, absorption is filled eventually, two all rise, four all rise, and six all rise, and eight all rise, ten all rise, vacuumize, vacuumize, vacuumize, vacuumize, vacuumize, vacuumize, reverse putting presses two, along putting two, nine all fall, and seven all fall, and five all fall, three all fall, and one all falls;

As Fig. 3, shown in 4, the present invention does not limit to and the foregoing description, and each adsorption tower in 24 adsorption towers of first workshop section's adsorption tower group 2 among the present invention passes through successively: absorption (A), one all falls (1D), and two all fall (2D), and three all fall (3D), four all fall (4D), and five all fall (5D), and six all fall (6D), seven all fall (7D), and eight all fall (8D), and nine all fall (9D), along putting (PP), reverse putting pressed one (D1), and reverse putting pressed two (D2), and reverse putting pressed three (D3), (V) finds time, pre-loading (R), nine all rise (9R), and eight all rise (8R), seven all rise (7R), six all rise (6R), and five all rise (5R), and four all rise (4R), three all rise (3R), two all rise (2R), and one all rises (1R), the pre-state that fills (Fr) eventually and fill (FR) eventually; Each adsorption tower in 24 adsorption towers of second workshop section's adsorption tower group 4 passes through successively: absorption (A), and along putting one (PP1), one all falls (1D), two all fall (2D), and three all fall (3D), and four all fall (4D), five all fall (5D), and six all fall (6D), and seven all fall (7D), eight all fall (8D), and nine all fall (9D), and ten all fall (10D), along putting two (PP2), reverse putting pressed one (D1), and reverse putting pressed two (D2), vacuumize (V), ten all rise (10R), and nine all rise (9R), eight all rise (8R), seven all rise (7R), and six all rise (6R), and five all rise (5R), four all rise (4R), three all rise (3R), and two all rise (2R), and one all rises (1R) and the whole state that fills (FR).The duty of first workshop section's adsorption tower group 2 and second workshop section's adsorption tower group 4 can be according to the time sequence status periodic duty of embodiment 1 to embodiment 12 and above-mentioned each adsorption tower needs process among the present invention.All valves among the present invention and three-way valve all can adopt Artificial Control or computer control dual mode.

The principle of the invention mainly is to utilize adsorbent under adsorptive pressure, and adsorbent is CO absorption selectively ₂, take off automatically under the low pressure and analyse CO ₂Principle, realize CO ₂Remove, thereby realize the CO in the unstripped gas ₂Remove to reach the purpose of Purge gas.Adsorbent among the present invention is: activated alumina, silica gel or active carbon.

Operation principle of the present invention is: unstripped gas is by having first workshop section's adsorption tower group 2 of adsorbent, CO ₂Be adsorbed, remaining gas continues to walk back, and this process is step for some adsorption towers, the CO that is adsorbed ₂In also contain small amount of H ₂And N ₂So, change middle impure CO by a series of pressure ₂Be recovered utilization, purer CO ₂Remove urea synthesis; Contain a spot of CO when entering second workshop section's adsorption tower group 4 gases ₂, after these gases enter second workshop section's adsorption tower group 4, same CO ₂Be adsorbed, this part gas also is to change by a series of pressure, and the gas effect of middle formation heterogeneity is variant; Gas in the purified gas surge tank 7 is H fully ₂And N ₂Continue to walk back, remove synthetic ammonia.Consist predominantly of CO in the described unstripped gas ₂, H ₂And N ₂

Claims

1. pressure swing adsorption decarbonization device, comprise the separator (1) that is connected with the unstripped gas pipeline, it is characterized in that: separator (1) links to each other 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) links to each other 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) links to each other 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), contrary venting surge tank (23), exhaust surge tank (25), carbon dioxide buffer jar (26) links to each other, contrary venting surge tank (23) links to each other with carbon dioxide buffer jar (26) by pipeline respectively with exhaust surge tank (25), carbon dioxide buffer jar (26) links to each other with carbon dioxide compressibility (27), be provided with first three-way valve (19) between first workshop section's adsorption tower group (2) and the contrary venting surge tank (23), the 3rd end of first three-way valve (19) links to each other with gas exhausting pipeline (22) by the 9th valve (18), between described first workshop section's adsorption tower group (2) and the exhaust surge tank (25) first vavuum pump (24) is installed; Be provided with first valve (10) 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 the semi-finished product surge tank (3) is provided with second three-way valve (20), first end of second three-way valve (20) links to each other with the gas outlet of first workshop section's adsorption tower group (2), pipeline between second end of second three-way valve (20) and the semi-finished product surge tank (3) is provided with second valve (11), second three-way valve (20) links to each other with first workshop section's adsorption tower group (2), be provided with the 3rd valve (12) between semi-finished product surge tank (3) and the second workshop section's adsorption tower group (4), described second workshop section's adsorption tower group (4) by respectively with the gas surge tank (6) that boosts, link to each other with blowing-out gas burner (28) along venting surge tank (5), the gas surge tank (6) that boosts links to each other with first workshop section's adsorption tower group (2) respectively with suitable venting surge tank (5), be provided with the tenth valve (9) between second workshop section's adsorption tower group (4) and the blowing-out gas burner (28), be provided with second vavuum pump (29) between described the tenth valve (9) and the 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 the purified gas surge tank (7), described purified gas surge tank (7) links to each other with second workshop section's adsorption tower group (4) by pipeline.

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

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

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

Step 2: make step 1 remove unstripped gas behind the moisture through first workshop section's adsorption tower group (2), described first workshop section's adsorption tower group (2) is made of 24 adsorption tower parallel connections, and wherein each adsorption tower is successively through 24 cycles, each adsorption tower passed through in 24 cycles: absorption, and one all falls, and two all fall, three all fall, and four all fall, and five all fall, six all fall, and seven all fall, and eight all fall, nine all fall, and along putting, reverse putting presses one, reverse putting presses two, and reverse putting presses three, finds time, pre-loading, nine all rise, and eight all rise, seven all rise, and six all rise, and five all rise, four all rise, and three all rise, and two all rise, one all rises, the pre-state that fills and fill eventually eventually; Above-mentioned is the circulations of 24 cycles;

In 24 adsorption towers of above-mentioned first workshop section's adsorption tower group (2), when adsorption tower enters when putting state, the gas in this adsorption tower enters in the gas recovery system (21); When adsorption tower enters reverse putting when pressing a state, the gas in this adsorption tower enters in the gas exhausting pipeline (22); When adsorption tower enters reverse putting when pressing two-state, can make gas in this adsorption tower enter gas exhausting pipeline (22) or in the surge tank (23) of exitting by regulating first three-way valve (19) and the 9th valve (18); When adsorption tower enters reverse putting when pressing three condition, the gas in this adsorption tower enters in the carbon dioxide compressibility (27) by carbon dioxide buffer jar (26); When adsorption tower enters evacuated, start first vavuum pump (24), the gas in this adsorption tower is entered in the exhaust surge tank (25); Gas in described contrary venting surge tank (23) and the exhaust surge tank (25) enters in the carbon dioxide compressibility (27) by carbon dioxide buffer jar (26);

Step 3: the unstripped gas in the above-mentioned steps two is through discharging semi-finished product gas after the above-mentioned running status in first workshop section's adsorption tower group (2) gas outlet, by regulating second three-way valve (20) semi-finished product gas is entered in first workshop section's adsorption tower group (2) or the semi-finished product surge tank (3), the semi-finished product gas that enters first workshop section's adsorption tower group (2) uses as the inflation eventually of adsorption tower in first workshop section's adsorption tower group (2), the semi-finished product gas that wherein enters in the semi-finished product surge tank (3) enters in second workshop section's adsorption tower group (4) with stable flow rate pressure 2.0MPa-2.3MPa in semi-finished product surge tank (3) back, second workshop section's adsorption tower group (4) is made of 24 adsorption tower parallel connections, wherein each adsorption tower is successively through 24 cycles, each adsorption tower is process absorption in 24 cycles, along putting one, one all falls, and two all fall, and three all fall, four all fall, five all fall, and six all fall, and seven all fall, eight all fall, nine all fall, and ten all fall, along putting two, reverse putting presses one, reverse putting presses two, vacuumizes, and ten all rise, nine all rise, eight all rise, and seven all rise, and six all rise, five all rise, four all rise, and three all rise, and two all rise, one all rises the state that fills eventually; Above-mentioned is the circulations of 24 cycles;

In 24 adsorption towers of above-mentioned second workshop section's adsorption tower group (4), when adsorption tower enters when putting a state, gas in this adsorption tower enters in first workshop section's adsorption tower group (2) by the gas surge tank (6) that boosts, pre-inflation eventually as the interior adsorption tower of first workshop section's adsorption tower group (2) is used, when adsorption tower enters reverse putting when pressing a state, gas in this adsorption tower is by entering in the first epimere adsorption tower group (2) along venting surge tank (5), pre-loading gas as the interior adsorption tower of first workshop section's adsorption tower group (2) uses, when entering reverse putting, adsorption tower presses two or when vacuumizing state, the gas in this adsorption tower is by blowing-out gas burner (28) burning;

Step 4: the semi-finished product gas in the step 3 through second workshop section's adsorption tower group (4) after, 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 the high-pressure unit (8) by purified gas surge tank (7), purified gas surge tank (7) links to each other with second workshop section's adsorption tower group (4) by pipeline, and the purified gas in the purified gas surge tank (7) is used as the inflation eventually of adsorption tower in second workshop section's adsorption tower group (4).