Economical and efficient in-furnace denitration method

A denitrification and high-efficiency technology, applied in the field of urea denitrification, can solve the problems of low flue gas denitrification efficiency and unsatisfactory denitrification effect, and achieve the effect of solving low denitrification efficiency, avoiding unfavorable factors of high temperature, and improving denitrification efficiency

Pending Publication Date: 2020-02-07
王惠生
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Problems solved by technology

[0007] In view of the above-mentioned deficiencies such as low flue gas denitrification efficiency and unsatisfactory denitrification effect in the prior art, the present invention provides an economical and efficient furnace denitrification method to solve the above technical problems

Method used

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Embodiment 1

[0025] An economical and high-efficiency furnace denitrification method, the method of the invention can be used for denitrification of boilers, kilns and incinerators.

[0026] The method of the present invention can be realized by using the following devices, corrosion-resistant liquid pump, blower, liquid flow meter, gas-liquid two-fluid spray gun, gas mixing device (cyclone mixer), denitration agent delivery pipeline, secondary instrument and control system, through Flow meter for measurement and control.

[0027] Denitration agent atomization - including ammonia atomization or urea atomization. Both urea and ammonia water can be used. The mass concentration of urea solution is 5-8%, and the mass concentration of urea solution is further preferably 7%. Urea is used as denitrification agent, and urea is made into a suitable concentration by utilizing the property that urea is easily soluble in water. The urea solution has good effect, is clean, hygienic and safe, and can a...

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Abstract

The invention relates to the technical field of urea denitration, in particular to an economical and efficient furnace denitration method. The qualified denitration agent solution is conveyed into a liquid inlet of a gas-liquid dual-fluid spray gun, the compressed gas is conveyed to a compressed air inlet of the gas-liquid dual-fluid spray gun, the denitration agent solution is atomized by using the gas-liquid dual-fluid spray gun, and the atomized denitration agent is sent to an air supply system, the denitration agent is mixed with the gas of the air supply system, the denitration agent is brought into a furnace hearth by using the air supply system, the denitration agent is brought into the furnace hearth by using the air supply system for combustion, and then denitration is completed.Compared with the conventional non-catalytic furnace denitration, the method avoids the high temperature unfavorable factors of adding denitration agent in the furnace, enables the denitration agent to be optimally mixed and reacted with the combustion system, and solves the problem of low denitration efficiency in the conventional furnace.

Description

technical field [0001] The invention relates to the technical field of urea denitrification, in particular to an economical and efficient furnace denitrification method. Background technique [0002] For flue gas denitrification, either ammonia water or urea is used. [0003] Ammonia denitrification has safety issues, and due to the low concentration, the transportation efficiency is low. Urea denitrification, because urea is easy to absorb moisture and is not easy to process into the particle size (200-250 mesh) required for flue gas denitrification reaction, usually requires the process of converting urea into ammonia (NH3). [0004] Flue gas denitrification, according to whether to use catalysts, mainly includes catalytic denitrification (SCR) and non-catalytic denitrification (SNCR). Catalytic denitration method has good denitrification effect, but there are a series of problems such as the requirement of reaction temperature between 450-250 degrees, easy poisoning of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/79B01D53/56F23K3/02
CPCB01D53/56B01D53/78B01D53/79B01D2251/2062B01D2251/2067F23K3/02
Inventor 王惠生马占峰刘士清谢静
Owner 王惠生
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