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

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...

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