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Ammonia recovery device

A recovery device and ammonia gas technology, applied in ammonia compound, inorganic chemistry, use of liquid separation agent, etc., can solve the problems of non-recovery of ammonia, environmental pollution, waste of resources, etc., achieve high recovery efficiency, meet environmental protection standards, occupy land small area effect

Inactive Publication Date: 2012-08-22
王树岩
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Problems solved by technology

[0002] During the production process of polyacrylamide, a large amount of ammonia-containing tail gas is produced. Because the tail gas contains oil and polymer dust, the recovered ammonia gas will contain oil and polyacrylamide, which is difficult to use. Therefore, the tail gas produced by the current domestic production of polyacrylamide , the ammonia is not recycled, and all of it is discharged into the atmosphere with the tail gas, causing environmental pollution and waste of resources

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Embodiment Construction

[0008] The tail gas from polyacrylamide production enters the ammonia gas recovery device of the present invention from the tail gas inlet 21, then flows upwards, passes through the washing area 2, the primary absorption area 3, and the secondary absorption area 4 in sequence, and finally is discharged into the atmosphere through the chimney 5.

[0009] Water is used as the washing liquid, the polyacrylamide dust in the tail gas dissolves into the water, the oil in the tail gas and water form an emulsion, in the washing liquid circulation separation tank 1, the oil and water are separated, the oil floats to the water surface, and the water is used as the washing liquid through the washing The cleaning liquid inlet pipe 27 in the washing area is added, which is not only used for cleaning the demister 25 in the washing area, but also for replenishing the washing liquid in the washing liquid circulation separation tank 1, replacing the washing liquid and overflowing the oil floatin...

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Abstract

The invention discloses an ammonia recovery device, relates to the technical field of waste gas purification, and solves the recovery problem of ammonia in tail gas containing polyacrylamide dust and oil. The device of the invention comprises a washing liquid circulating separation tank, a washing region, a primary absorption region, a secondary absorption region, and a chimney; water is used as the washing agent for removing polyacrylamide dust and oil in tail gas so as to ensure pure ammonium salts are obtained at the absorption region; a dilute acid is used as the absorption liquid for ammonia recovery so as to prepare ammonium salts. The device is compact in structure, less in land occupation, high in recovery efficiency, simple and reliable in operation management; the purity of the recovered ammonium salts is high; and the environmental protection standard for tail gas discharge is completely satisfied.

Description

technical field [0001] The invention relates to the technical field of exhaust gas purification, in particular to an ammonia recovery device. Background technique [0002] During the production process of polyacrylamide, a large amount of ammonia-containing tail gas is produced. Because the tail gas contains oil and polymer dust, the recovered ammonia gas will contain oil and polyacrylamide, which is difficult to use. Therefore, the tail gas produced by the current domestic production of polyacrylamide , Ammonia is not recycled, and all of it is discharged into the atmosphere along with the tail gas, causing environmental pollution and waste of resources. Contents of the invention [0003] The invention provides an ammonia gas recovery device, which organically combines tail gas purification and ammonia recovery, and the recovered ammonia is very pure and can be made into nitrogen fertilizer for agricultural production. [0004] An ammonia gas recovery device of the prese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/58B01D47/00C01C1/16C01C1/242
Inventor 王树岩
Owner 王树岩
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