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Denitration system and denitration method for smoke of particle material industrial boiler

A technology for industrial boilers and granular materials, which is applied in the field of flue gas denitrification and can solve the problems that other methods are in the experimental research stage or pilot test stage.

Pending Publication Date: 2017-05-17
SHENWU TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many flue gas denitrification methods, but currently only the selective catalytic reduction method and the selective non-catalytic reduction method have been widely used in industry, and other methods are currently in the experimental research stage or pilot stage

Method used

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  • Denitration system and denitration method for smoke of particle material industrial boiler
  • Denitration system and denitration method for smoke of particle material industrial boiler

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0095] According to an embodiment of the present invention, the preparation method of the denitration catalyst specifically includes:

[0096] (1) Preparation of carrier

[0097] Take a certain amount of titanium source reagent titanyl sulfate and aluminum source reagent aluminum chloride, dissolve them in an appropriate amount of deionized water, and stir evenly to prepare titanium source and aluminum source solutions respectively. The ratio of the concentrations of the two is 1:(0.01 ~2). The titanium source solution, aluminum source solution, and ammonia water are dripped into a reaction kettle with a small amount of deionized water at a certain flow rate in a parallel flow. The reaction kettle is equipped with a stirring device to ensure that the solutions are evenly mixed and fully reacted. The dripping speed of the titanium source solution and the aluminum source solution is the same, the dripping speed of ammonia water is controlled, the pH value of the reaction soluti...

Embodiment

[0114]The anthracite crushed to less than 6mm is fed into the furnace of the boiler through the feeding device, mixed with the air sent into the furnace by the blower, and then burned. The temperature in the furnace can reach 1250°C. The atomized reducing agent nozzle installed in the furnace sprays urea droplets. Under the action of high temperature in the furnace, the urea quickly decomposes to ammonia, and the ammonia reacts with the nitrogen oxides in the high-temperature flue gas generated by combustion to partially remove nitrogen. The high-temperature flue gas of oxides passes through the convection tube bundle installed at the flue gas outlet of the furnace, and the flue gas whose temperature is lowered to below 350°C is preliminarily dedusted by the cyclone dust removal device and then enters the denitrification system. Under the action of the depinning catalyst, the nitrogen oxides in the flue gas undergo a reduction reaction with ammonia to further remove nitrogen ox...

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PUM

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Abstract

The invention discloses a denitration system and a denitration method for smoke of a particle material industrial boiler. The denitration system comprises a particle material industrial boiler, a cyclone separation apparatus, a denitration apparatus, an air pre-heater, a desulphurization apparatus and a chimney, wherein a hearth side wall of the particle material industrial boiler is provided with a reducing agent nozzle, and the reducing agent nozzle is suitable for spraying a reducing agent into a hearth; the cyclone separation apparatus is connected with a smoke outlet of the particle material industrial boiler, and the cyclone separation apparatus is suitable for performing the dust collection treatment for the smoke; a denitration catalyst is arranged in the denitration apparatus, the denitration apparatus is connected with the cyclone separation apparatus, and the denitration apparatus is suitable for the denitration treatment for the smoke; the air pre-heater is connected with the denitration apparatus, and the air pre-heater is suitable for utilizing the smoke waste heat to pre-heat the oxygen-containing gas; the desulphurization apparatus is connected with the air pre-heater, and the desulphurization apparatus is suitable for removing sulfur oxides in the smoke; and the chimney is connected with the desulphurization apparatus. By utilizing the denitration system, the denitration reaction can be carried out without the dust removal, the operation is simple, and the denitration efficiency is high.

Description

technical field [0001] The invention belongs to the field of flue gas denitration, in particular, the invention relates to a flue gas denitrification system and a denitrification method for industrial boilers with granular materials. Background technique [0002] With the rapid development of my country's economy, fossil fuels such as natural gas, oil and coal have been more widely used, making environmental problems increasingly serious, which has caused a series of environmental problems, such as acid rain, ozone layer destruction, greenhouse effect, etc., making us The living environment is becoming more and more severe. my country's coal-based energy structure determines that the emissions of nitrogen oxides and sulfur oxides in our country have always been high. The emission of a large amount of polluting gases has made environmental problems increasingly serious, not only seriously affecting the production and life of our people. , and is not conducive to the sustainabl...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/90B01D53/56
CPCB01D53/8631B01D53/90B01D2255/2063B01D2255/20707B01D2255/20723B01D2255/20738B01D2255/20776B01D2255/2092B01D2258/0283
Inventor 王志军陈珊钟贵全王东方田中君吴道洪
Owner SHENWU TECH GRP CO LTD