Device and process for removing NOx by hyper-gravity with high efficiency

A technology of supergravity and removal, applied in the direction of separation method, dispersion particle separation, chemical instruments and methods, etc., can solve the problems of high energy consumption, low efficiency, unstable outlet concentration, etc., achieve continuous operation stability, simple process, low cost effect
CN103521055AInactive Publication Date: 2014-01-22BEIJING UNIV OF CHEM TECH +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING UNIV OF CHEM TECH
Publication Date
2014-01-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a device for removing NOx by hyper-gravity with high efficiency. The device comprises a hyper-gravity gas conditioner, a nitric acid circulating tank, a hyper-gravity lye absorber, a demister and a lye tank, wherein the nitric acid circulating tank is connected to a first circulating pump through a first pipe, and the first circulating pump is connected and communicated with the hyper-gravity gas conditioner through a second pipe; the hyper-gravity gas conditioner is connected to the nitric acid circulating tank through a third pipe; the hyper-gravity gas conditioner is externally connected with an pipe for conveying industrial exhaust which contains nitric acid gas or NOx; the hyper-gravity gas conditioner is connected to the hyper-gravity lye absorber through a fourth pipe; the hyper-gravity lye absorber is connected to the demister through a fifth pipe; the demister is connected to the lye tank through a sixth pipe; the lye tank is connected to a second circulating pump through a seventh pipe; a liquid outlet pipe is arranged on an eighth pipe. The device for removing NOx by hyper-gravity with high efficiency has the beneficial effects that the process flow is simple, the NOx removing efficiency can reach over 93%, continuous operation is stable, and the cost is low.
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Description

technical field

[0001] The invention relates to a method for removing NO x device and process, especially related to a high-efficiency removal of NO by supergravity x devices and processes. Background technique

[0002] Nitrogen oxides (NO x ) mainly refers to NO 2 and NO mixture. In industrial production of nitric acid, ammonia is generally oxidized to NO x After absorption with water or dilute acid in the system. Due to the process and chemical reaction characteristics, NO x It cannot be completely absorbed in the nitric acid absorption tower, and there is always a certain concentration of NO in the exhaust gas x , its concentration is generally 1500-5000mg / m 3 , far exceeding the national regulation of 170mg / m 3 .

[0003] There are many gas treatment methods in the production process of dilute nitric acid, and there are mainly three kinds that can be applied in industry: chemical absorption method, pressure swing adsorption method and catalytic reduction method...

Claims

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