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Method and device for producing ammonium bicarbonate by ammonia process decarbonization system

An ammonium bicarbonate, decarbonization technology, applied in separation methods, chemical instruments and methods, ammonium carbonate/acid carbonate, etc., can solve the problems of ammonia escape and low absorption efficiency

Pending Publication Date: 2022-08-09
JIANGSU NEW CENTURY JIANGNAN ENVIRONMENTAL PROTECTION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problems of low absorption efficiency and serious ammonia escape encountered in the ammonia decarbonization system of the prior art and effectively increase the output of the by-product ammonium bicarbonate, the inventors have carried out diligent research

Method used

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  • Method and device for producing ammonium bicarbonate by ammonia process decarbonization system
  • Method and device for producing ammonium bicarbonate by ammonia process decarbonization system

Examples

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Embodiment 1

[0042] using as figure 1 The apparatus shown carries out this example. Contains CO 2 The process gas 1 first enters the cooling functional area 2, where the process gas and the circulating liquid are in countercurrent contact to cool down, the circulating liquid is circulated by the cooling circulating pump 3, and the circulating liquid is cooled by the heat exchanger 4. The circulating liquid can be water. During the circulating process, the components entrained by the process gas may enter the circulating liquid, so that the circulating liquid contains components such as ammonium sulfate, a by-product of the previous ammonia desulfurization process.

[0043] The gas cooled to 25°C enters the ammonium bicarbonate generation zone 5 , where the process gas reacts with the circulating liquid in countercurrent contact to generate ammonium bicarbonate, and the circulating liquid is circulated through the circulating pump 9 . The process gas leaving the ammonium bicarbonate gener...

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Abstract

The device and the method are characterized in that the device comprises a cooling functional area, an ammonium bicarbonate generation area, a carbon dioxide absorption area and an ammonia removal functional area, the cooling functional area is used for removing heat of the decarbonization system, the ammonium bicarbonate generation area is used for generating ammonium bicarbonate, and the carbon dioxide absorption area is used for absorbing carbon dioxide. The carbon dioxide absorption area is used for absorbing carbon dioxide in process gas and adopts multi-stage absorption, the ammonia removal functional area is used for removing ammonia in the decarburized process gas, and the absorbent ammonia for removing the carbon dioxide is mainly added from the carbon dioxide absorption area. Through zoned control of ammonium bicarbonate generation, CO2 absorption and ammonia removal, the decarburization absorption efficiency is improved, ammonia escape is reduced, and meanwhile, carbon dioxide in flue gas can be used for producing ammonium bicarbonate which can be used as a nitrogen fertilizer.

Description

Technical field [0001] The invention belongs to the technical field of environmental protection, and specifically relates to a method and device for producing ammonium bicarbonate in an ammonia decarbonization system. Background technique [0002] At present, the waste gas treatment efficiency of various industrial enterprises is generally low, or it is discharged into the atmosphere only after desulfurization and dust removal. A large amount of CO 2 Greenhouse gases are discharged into the environment, causing a series of environmental problems such as accelerated global warming. Therefore, we seek a positive and effective CO 2 Gas treatment methods have become one of the issues that countries need to solve urgently. Ammonium bicarbonate is a quick-acting nitrogen fertilizer with the molecular formula NH 4 HCO 3 , easily soluble in water, easy to decompose, suitable for various crops and various soils, and carbon dioxide is one of the raw materials for preparing ammoniu...

Claims

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Application Information

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IPC IPC(8): B01D53/78B01D53/62C01C1/26
CPCB01D53/78B01D53/62C01C1/26B01D2251/206B01D2251/2062B01D2257/504Y02C20/40C01C1/28
Inventor 张军王金勇祁丽昉罗静
Owner JIANGSU NEW CENTURY JIANGNAN ENVIRONMENTAL PROTECTION
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