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Process and equipment for extracting hydrogen from air discharged from synthetic ammonia tank

A technology for releasing air and synthesizing ammonia, which is applied in the field of air releasing and hydrogen extraction technology and equipment in a synthetic ammonia storage tank, can solve the problems of high consumption of raw coal, low added value of products, low utilization rate of raw gas, etc., and achieves energy saving and good economic benefits. and social benefits, the effect of increasing the added value of applications

Inactive Publication Date: 2010-09-08
山东晋控明水化工集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Not only the added value of the product is low, but also the utilization rate of raw gas is not high, and the consumption of raw coal is high.

Method used

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  • Process and equipment for extracting hydrogen from air discharged from synthetic ammonia tank
  • Process and equipment for extracting hydrogen from air discharged from synthetic ammonia tank
  • Process and equipment for extracting hydrogen from air discharged from synthetic ammonia tank

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Ammonia storage tank release air data:

[0028] Output is 1200Nm 3 / h; Composition: H 2 19.5%, N 2 5%, CH 4 14%, Ar1.5%, NH 3 60%; the pressure is 2.2±0.5MPa.

[0029] Selected equipment: copper cleaning ammonia tower 1, copper liquid separator 2, equal pressure ammonia cleaning device 3, ammonia washing tower 4, gas-liquid separator 5, casing heater 6, membrane separator 7.

[0030] Hydrogen extraction process:

[0031] a. Net ammonia:

[0032] 1) will come from the synthetic ammonia storage tank containing H 2 , N 2 , NH 3 、CH 4 After being filtered by the pipeline filter, the exhausted air is sent to the copper cleaning ammonia tower 1 from the bottom, and is reversely contacted with the low-ammonia copper ammonia liquid sent from the top of the tower to perform primary ammonia purification. (The ammonia-rich copper ammonia liquid obtained after absorbing ammonia flows out from the bottom of the tower and is sent to the refining ammonia cooler to be used a...

Embodiment 2

[0043] Ammonia storage tank release air data:

[0044] Output is 1800Nm 3 / h; Composition: H 2 21%, N 2 4.5%, CH 4 15%, Ar1.5%, NH 3 58%; the pressure is 2.3±0.5MPa.

[0045] Selected equipment: copper cleaning ammonia tower, copper liquid separator, equal pressure ammonia cleaning device, ammonia washing tower, gas-liquid separator, casing heater, membrane separator.

[0046] Hydrogen extraction process: It is basically the same as the hydrogen extraction process in Example 1, but the ammonia content of the gas after three-stage ammonia purification is required to be 130±50PPm. The pressure on the permeate side is 0.4±0.2MPa, and the pressure on the tail gas side is 1.7±0.2MPa.

[0047] After hydrogen extraction, the hydrogen concentration in the permeate gas is 82%, and the hydrogen concentration in the tail gas can be reduced to below 4% (no explosion when energized).

[0048] The hydrogen recovery rate is 80%.

[0049] The output value of the hydrogen conversion sy...

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Abstract

The invention discloses a process and the device to recover the hydrogen from the synthetic ammonia storage purge. It uses the technology of the ammonia cleaning, the gas-liquid separating, heating and membrane separation technique. It limits the ammonia content of the limiting membrane separator and the air pressure in the process to recovery the hydrogen. So it can decrease the waste of the material gas and synthetic ammonia cost.

Description

technical field [0001] The invention relates to a recovery technology of releasing air, in particular to a process and equipment for extracting hydrogen by releasing air in a synthetic ammonia storage tank. Background technique [0002] A large amount of released air will be produced during ammonia synthesis in fertilizer plants, the most important part of which is produced during the synthesis process, with a pressure of 10-32 MPa and a hydrogen content of over 50%. In the prior art, there are many mature technical solutions for the recovery of this part of hydrogen. In particular, the membrane separation hydrogen extraction method has been widely used for its advantages of no material consumption, less land occupation, and low energy consumption. It can increase the purity of hydrogen in the vented air from about 50% to more than 90%. [0003] During the production of synthetic ammonia, there will be another part of vented air—the vented air of the synthetic ammonia stora...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B3/50
Inventor 周霖殷传光于兴辉张其文张成军
Owner 山东晋控明水化工集团有限公司
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