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Absorption tower technical method of multi-stage spraying and desorbing ammonia in gas

A process method and absorption tower technology, applied in the field of absorption tower technology, can solve the problems of unreasonable gas distribution, difficulty in meeting the concentration requirements of ammonia, low absorption rate, etc., and achieve the effect of overcoming unreasonable gas distribution

Inactive Publication Date: 2009-10-07
BAOSTEEL ENG & TECH GRP
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Problems solved by technology

[0003] The saturator method is only suitable for the production of ammonium sulfate by absorbing ammonia in the gas with sulfuric acid, and its scope of application is narrow
The absorption tower method has a wide range of applications and is suitable for absorbing ammonia in gases with various acidic liquids, but it has the defects of gas-liquid drift and low absorption rate.
[0004] There are two reasons for the gas-liquid drift in the absorption tower: one is the unreasonable gas distribution; the other is the uneven distribution of the spray liquid
The reason for the low efficiency of the absorption tower is: the liquid droplets sprayed by the nozzle are large, unevenly distributed and gas-liquid drift, the large droplet leads to a small contact area; the uneven distribution and gas-liquid drift lead to a small contact area
The absorption rate of the absorption tower is low, so that it cannot handle the gas with high ammonia content, or it is difficult to meet the concentration requirements of the ammonia content of the gas after absorption

Method used

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  • Absorption tower technical method of multi-stage spraying and desorbing ammonia in gas

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Embodiment Construction

[0017] A multi-stage spraying method for absorbing towers for removing ammonia from gases will be described in detail below in conjunction with the accompanying drawings.

[0018] Referring to the accompanying drawings, the present invention is a multi-stage spray deammonization absorption tower, which consists of a tower body welded from bottom to top by tower base 1, tower body 20 and cone 17, a mist catcher 19, a It consists of an acid supply port 3, an overflow pipe 27, a liquid level gauge, a pressure gauge, a manhole I 28, a manhole II 15 and multi-stage spraying units installed in the tower body 20 at different heights.

[0019] Among them, the upper spraying unit is composed of a spraying device and a liquid breaker plate n 10, and the lowermost spraying unit is composed of a spraying device. The spraying devices are all installed outside the tower, and the nozzles extend into the tower from the outside. The spraying device is composed of a ring pipe I 8, a ring pipe ...

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Abstract

The invention relates to an absorption tower technical method of multi-stage spraying and desorbing ammonia in gas; several sections of spraying units and the mist matcher are arranged in the absorption tower; the spraying unit is sectionally arranged in the tower body based on different height; the following steps are executed in the absorption tower: a, ammonia enriched gas enters in a first section of the absorption tower from an inlet and upwards flows, and is evenly distributed along the section of the absorption tower; b, the gas reaches the upper part of the absorption tower through all of liquid breaking disks; when the gas passes through the mist catcher, the clamped drop is collected; c, the recycled liquid in the first section of the tower bottom is extracted; d, the recycled liquid is sprayed in the absorption tower through the circular tube; a small part of the liquid overflows from the overflowing plate to the next section of the absorption tower and is simultaneously sprayed by multiple nozzles; e, the gas in every absorption section in the absorption tower upwards flows and the liquid is downwardly sprayed such that the ammonia in the ammonia enriched gas is absorbed by the recycled liquid to realize dehydrogenation of the ammonia enriched gas. The invention can flexibly select one or more spraying techniques to absorb the ammonia in the gas and to reach the requirement.

Description

technical field [0001] The invention relates to a process for deammonizing chemical gas, in particular to an absorption tower process method for deammonizing chemical gas by using a multi-stage spraying device. Background technique [0002] In the prior art, there are two methods for removing ammonia from gas: one is the saturator method, and the other is the absorption tower method. [0003] The saturator method is only suitable for the production of ammonium sulfate by absorbing ammonia in the gas with sulfuric acid, and its scope of application is narrow. The absorption tower method has a wide range of applications and is suitable for absorbing ammonia in gases with various acidic liquids, but it has the defects of gas-liquid drift and low absorption rate. [0004] There are two reasons for the gas-liquid drift in the absorption tower: one is the unreasonable gas distribution; the other is the uneven distribution of the spray liquid. The reasons for the low efficiency o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/58B01D53/78
CPCY02A50/20
Inventor 赵刚山陈福利郭雅文李同军
Owner BAOSTEEL ENG & TECH GRP
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