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Method for absorbing and purifying ammonia gas in aluminum ash treatment technology

A treatment process and ammonia gas technology, applied in chemical instruments and methods, gas treatment, separation methods, etc., can solve the problem of high ammonia content, and achieve the effects of high purity, good separation effect and better filtration effect.

Inactive Publication Date: 2018-11-23
YUNNAN WENSHAN ALUMINUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for ammonia absorption and purification in the aluminum ash treatment process, to solve the problem of ammonia content in the mixed gas after the ammonia absorption and purification method in the prior art is used to separate the mixed gas of ammonia and hydrogen. high problem

Method used

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  • Method for absorbing and purifying ammonia gas in aluminum ash treatment technology

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specific Embodiment 1

[0033] A method for absorbing and purifying ammonia in an aluminum ash treatment process, characterized in that it comprises the following steps: a. first passing the mixed gas of ammonia and hydrogen into the waste heat channel; b. waiting for the mixed gas of ammonia and hydrogen to pass through After the waste heat passage, it is introduced into the ammonia absorption and purification system for purification and absorption; c. Finally, the purified hydrogen is sent to the gas mixing station to be mixed with coal gas and used as a fuel for the roaster, and the ammonia liquid that has absorbed ammonia It is sent to the ammonia desulfurization system for reuse.

[0034] Using the waste heat channel to make the particles wrapped in the mixed gas that will react to form impurities react more quickly, reducing the generation of impurities in the subsequent treatment process, and more impurities are generated in the waste heat channel instead of entering the ammonia gas absorption ...

specific Embodiment 2

[0035] Such as figure 1As shown, the present embodiment further illustrates the ammonia absorption and purification system on the basis of specific embodiment 1. The ammonia absorption and purification system in the step b includes a primary cooling absorption tower 1, a secondary Absorption tower 2 and dust remover 3, the air inlet and exhaust port of described primary cooling absorption tower 1 are respectively connected with the air outlet of dust remover 3 and the inlet of secondary absorption tower 2 through pipelines, and the air inlet of dust remover 3 The inlet end is connected to the mixed gas inlet pipe, and the packing layer 4 in the inner cavity of the secondary absorption tower 2 has more than two layers, and the spray mechanism set at the lower part of the inner cavity of the secondary absorption tower 2 and used in conjunction with the lowermost packing layer is No. 2 The bottom spraying mechanism 5, the water inlet end of the water supply pipe of the No. 2 bott...

specific Embodiment 3

[0037] In this embodiment, an absorption tower cooling mechanism is added on the basis of the specific embodiment 2, and the absorption tower cooling mechanism is provided outside the tower wall of the first-stage cooling absorption tower 1 .

[0038] Since the ammonia gas will dissolve into the water when the mixed gas is washed, and the ammonia gas will release a certain amount of heat when it dissolves, so the temperature in the primary cooling absorption tower will continue to rise, so the tower of the primary cooling absorption tower The absorption tower cooling mechanism is set outside the wall, which can absorb the heat in the first-level cooling absorption tower, maintain the temperature inside the first-level cooling absorption tower at a reasonable level, and prolong the service life of the first-level cooling absorption tower. There is no absorption tower cooling mechanism on the outer wall of the secondary absorption tower, because clean water enters the secondary a...

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Abstract

The invention discloses a method for absorbing and purifying an ammonia gas in an aluminum ash treatment technology. The method comprises the following steps: a, introducing a mixed gas of the ammoniagas and hydrogen into a waste heat passage; b, after enabling the mixed gas of the ammonia gas and the hydrogen to pass through the waste heat passage, and guiding the mixed gas into an ammonia gas absorbing and purifying system for purifying and absorbing; c, finally, feeding purified hydrogen into a gas mixing station, mixing the purified hydrogen with coal gas, using a mixed gas of the hydrogen and the coal gas as fuel of a roasting furnace, and feeding an ammonia solution in which the ammonia gas is absorbed into an ammonia desulfurization system for reutilizing. According to the method disclosed by the invention, the problem that after an ammonia gas absorbing and purifying method in the prior art is used for separating the mixed gas of the ammonia gas and the hydrogen, the content of the ammonia gas in the mixed gas is high can be solved.

Description

technical field [0001] The invention relates to absorption and purification of ammonia gas, in particular to a method for absorption and purification of ammonia gas in an aluminum ash treatment process. Background technique [0002] In the existing chemical production, the mixed gas of ammonia and hydrogen is often produced. After the ammonia and hydrogen are mixed, they cannot be used directly. They need to be separated and recovered separately before being reused. In the process of separating and recovering ammonia and hydrogen, Pay attention to safety, after using the existing ammonia absorption and purification method to treat the mixed gas, the concentration of ammonia in the mixed gas will still be in a high state, the ammonia absorption effect is not good, and the service life of the packing layer in the absorption tower Short and not easy to replace. Contents of the invention [0003] The purpose of the present invention is to provide a method for ammonia abso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D46/02B01D46/10B01D53/18
CPCB01D46/02B01D46/10B01D53/1406B01D53/1412B01D53/1493B01D53/18B01D2252/102B01D2257/406
Inventor 谭云川车立志高云川杨德荣乔举旗韩海健李俊福唐绍华张建猛朱杨昆唐亮
Owner YUNNAN WENSHAN ALUMINUM
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