CN101015761A - Pressure-swing-adsorption purging regeneration method without using vacuum pump - Google Patents

Pressure-swing-adsorption purging regeneration method without using vacuum pump Download PDF

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Publication number
CN101015761A
CN101015761A CN 200610166599 CN200610166599A CN101015761A CN 101015761 A CN101015761 A CN 101015761A CN 200610166599 CN200610166599 CN 200610166599 CN 200610166599 A CN200610166599 A CN 200610166599A CN 101015761 A CN101015761 A CN 101015761A
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China
Prior art keywords
adsorption
vacuum pump
pressure
swing
regeneration method
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CN 200610166599
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Chinese (zh)
Inventor
蒋远华
王华雄
杨晓勤
何涛
昝锐
万斌
袁国梁
张斌
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YIHUA GROUP CO Ltd HUBEI PROV
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YIHUA GROUP CO Ltd HUBEI PROV
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Priority to CN 200610166599 priority Critical patent/CN101015761A/en
Publication of CN101015761A publication Critical patent/CN101015761A/en
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Abstract

A variable-pressure adsorption blowing regeneration method without vacuum pump uses extraction purification two-stage variable-pressure adsorption PSA device, and avoids vacuum pump to uses blown gas to desorb the adsorption bed layer to completely regenerate the sorbent. The invention can reduce electricity consumption and reduce maintenance cost.

Description

Pressure-swing-adsorption purging regeneration method without using vacuum pump
Technical field
The present invention relates to the method that a kind of admixture of gas separates, particularly a kind of vacuum pump less pressure-swing-adsorption purging regeneration method.
Background technology
Wet method decarburization technique power consumption is 100-135 degree/ton ammonia, and solvent loss is 10 yuan of/ton ammonia substantially, and hydrogen loss is 0.5-3% (carbon third is 3%, and NHD is 1%, low-temperature rectisol 0.5%); Now adopt vavuum pump to vacuumize, it is in order to reduce the dividing potential drop of absorbed component, to make adsorbent obtain better regeneration effect that vavuum pump vacuumizes.But vavuum pump belongs to power-equipment, and its maintenance cost remote-effects are to the economic benefit of company.This technology power consumption is 50-130 degree/ton ammonia (an adsorptive pressure height, power consumption is low), hydrogen loss 2-4% (with adsorptive pressure and all press number of times change).Decrease than wet method decarburization technique power consumption, solvent-free loss, however the hydrogen loss rate rises to some extent.
Summary of the invention
The purpose of this invention is to provide a kind of further reduction power consumption, the hydrogen loss rate is dropped to minimum zone, and reduce the pressure-swing-adsorption purging regeneration method without using vacuum pump of the required maintenance cost of power-equipment.
The object of the present invention is achieved like this: a kind of pressure-swing-adsorption purging regeneration method without using vacuum pump, and adopt and purify, purify two sections transformation absorption PSA devices, utilize sweep gas that adsorption bed is forced desorb, make adsorbent obtain holomorphosis.
Purification system and cleaning system are through repeatedly all pressing step.It is 20 times that purification system is all pressed step.It is four times that cleaning system is all pressed step.The purging regeneration that is used for purification section along exitting of purification section.The contrary venting of purification section be used to the to purify purging regeneration of workshop section.The purification of purification section purges waste gas be used to the to purify purging regeneration of workshop section.
Pressure-swing-adsorption purging regeneration method without using vacuum pump provided by the present invention utilizes sweep gas that adsorption bed is forced desorb, makes adsorbent obtain holomorphosis, does not need to use vavuum pump, has reduced power consumption, has reduced the required maintenance cost of power-equipment.
Description of drawings
Fig. 1 is a process flow diagram of the present invention.
The specific embodiment
Pressure is that 2.0MPa, temperature enter four towers that are in adsorption step in the adsorption tower group less than 45 ℃ conversion gas by out-of-bounds sending into purification system after moisture trap is removed free water, from bottom to top by bed, goes out the middle gas of tower and enters cleaning system.When the concentration forward position that is adsorbed impurity exports near bed, close the terminal valve of absorption, make it stop absorption, reclaim the purified gas of bed dead space by all pressing step for 20 times, then against the step-down of absorption direction.Easily absorbed component is discharged, and adsorbent is tentatively regenerated, and with residual absorption impurity on the further desorb adsorbent of sweep gas, adsorbent obtains holomorphosis again.After purging end, utilize cleaning system gaseous mixture, purification system all to calm the anger and export middle gas to boost near adsorptive pressure bed is reverse, adsorbent bed just begins to enter next sorption cycle process.Contrary venting air inlet cabinet purges stripping gas air inlet in early stage cabinet, later stage emptying.
Middle gas enters and purifies three towers that are in adsorption step in the adsorption tower group, from bottom to top by adsorption tower, goes out adsorption cleaning pneumatic transmission high-pressure unit.When the impurity concentration forward position of absorption when the adsorbent bed outlet, close the terminal valve of absorption.Make it stop absorption, reclaim the purified gas of adsorption bed dead space, carry out then entering three surge tanks respectively, then enter the gaseous mixture surge tank, as the sweep gas of purifying plant against the step-down of absorption direction along putting three times by all pressing step for four times.After purging end, the adsorbent of purifier obtains holomorphosis.Utilize cleaning system all to press with purified gas and boost near adsorptive pressure bed is reverse, adsorbent bed just begins to enter next sorption cycle process.
Single tower circulation step of purifying:
(the adsorption bed nature desorb of (desorb of adsorption bed nature) → contrary putting all falls in absorption (absorbing the CO2 Purge gas) → several times, and reclaim high concentration CO 2) → purge and reclaim (utilize to purify to purge waste gas adsorption bed is forced desorb, and reclaim high concentration CO 2) → purge vent (utilize purify purge waste gas adsorption bed is forced desorb) → several times all to rise (adsorption bed recovery gas) → enter adsorption process of next circulation
Purify single tower circulation step:
(the adsorption bed nature desorb of (desorb of adsorption bed nature) → suitable putting all falls in absorption (absorbing the CO2 Purge gas) → several times, be used for the purging regeneration of purification section along venting) → contrary putting (adsorption bed nature desorb, contrary venting be used to the to purify purging regeneration of workshop section) → purge (utilize to purify to purge waste gas adsorption bed is forced desorb, sweep gas be used to purify the purging regeneration of workshop section) → several times all rise (adsorption bed recovery gas) → enter adsorption process of next circulation.
CO2 volumn concentration 27% in the conversion gas removes CO in the cleaning of off-gas of refining workshop section after purifying, purifying 2Volumn concentration is 0.2%, and the purification section sweep gas accounts for the 3-5% of the volumn concentration of system handles tolerance, and the sweep gas of purify is used to purify and drops a hint its CO after the purging displacement of workshop section 2Average external volume percentage composition average out to 85% has two kinds of products after the transformation adsorption treatment: the product gas that purification workshop section comes out, and major part is CO2, it is synthetic to be used for urea; The purification section tail gas discharged is gone refining, is used for synthetic ammonia workshop section.

Claims (7)

1, a kind of pressure-swing-adsorption purging regeneration method without using vacuum pump adopts and purifies, purifies two sections transformation absorption PSA devices, it is characterized in that: utilize sweep gas that adsorption bed is forced desorb, make adsorbent obtain holomorphosis.
2, pressure-swing-adsorption purging regeneration method without using vacuum pump according to claim 1 is characterized in that: purification system and cleaning system are through repeatedly all pressing step.
3, pressure-swing-adsorption purging regeneration method without using vacuum pump according to claim 1 and 2 is characterized in that: it is 20 times that purification system is all pressed step.
4, pressure-swing-adsorption purging regeneration method without using vacuum pump according to claim 1 and 2 is characterized in that: it is four times that cleaning system is all pressed step.
5, according to the described pressure-swing-adsorption purging regeneration method without using vacuum pump according to claim 1 of claim 1, it is characterized in that: the purging regeneration that is used for purification section along exitting of purification section.
6, pressure-swing-adsorption purging regeneration method without using vacuum pump according to claim 1 is characterized in that: the contrary venting of purification section be used to the to purify purging regeneration of workshop section.
7, pressure-swing-adsorption purging regeneration method without using vacuum pump according to claim 1 is characterized in that: the purification of purification section purges waste gas be used to the to purify purging regeneration of workshop section.
CN 200610166599 2006-12-28 2006-12-28 Pressure-swing-adsorption purging regeneration method without using vacuum pump Pending CN101015761A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200610166599 CN101015761A (en) 2006-12-28 2006-12-28 Pressure-swing-adsorption purging regeneration method without using vacuum pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200610166599 CN101015761A (en) 2006-12-28 2006-12-28 Pressure-swing-adsorption purging regeneration method without using vacuum pump

Publications (1)

Publication Number Publication Date
CN101015761A true CN101015761A (en) 2007-08-15

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103405993A (en) * 2013-04-09 2013-11-27 内蒙古乌拉山化肥有限责任公司 Pressure swing adsorption method
CN103933825A (en) * 2014-04-03 2014-07-23 湖北宜化化工股份有限公司 Device and process for recycling reversely-released gas of PSA (Primary Secondary Amine) purification section to refinement section
CN107983029A (en) * 2017-12-26 2018-05-04 同方威视技术股份有限公司 Gas cleaning plant and trace materials detection device
CN111655657A (en) * 2017-12-05 2020-09-11 Bp北美公司 Process for recovering paraxylene in a pressure swing adsorption unit with varying hydrogen purge pressure
CN113713564A (en) * 2021-09-07 2021-11-30 安徽泉盛化工有限公司 Pressure swing adsorption system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103405993A (en) * 2013-04-09 2013-11-27 内蒙古乌拉山化肥有限责任公司 Pressure swing adsorption method
CN103933825A (en) * 2014-04-03 2014-07-23 湖北宜化化工股份有限公司 Device and process for recycling reversely-released gas of PSA (Primary Secondary Amine) purification section to refinement section
CN103933825B (en) * 2014-04-03 2016-04-20 湖北宜化化工股份有限公司 A kind of PSA clean-up stage inverse put gas is recovered to rectifying section retracting device and recovery process again
CN111655657A (en) * 2017-12-05 2020-09-11 Bp北美公司 Process for recovering paraxylene in a pressure swing adsorption unit with varying hydrogen purge pressure
CN111655657B (en) * 2017-12-05 2023-05-26 英力士美国化学公司 Method for recovering para-xylene in pressure swing adsorption unit with varying hydrogen purge pressure
CN107983029A (en) * 2017-12-26 2018-05-04 同方威视技术股份有限公司 Gas cleaning plant and trace materials detection device
CN113713564A (en) * 2021-09-07 2021-11-30 安徽泉盛化工有限公司 Pressure swing adsorption system
CN113713564B (en) * 2021-09-07 2024-04-26 安徽泉盛化工有限公司 Pressure swing adsorption system

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Open date: 20070815