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Denitration system and denitration method for fuel gas of pulverized coal industrial boiler

An industrial boiler and pulverized coal technology, applied in the field of flue gas denitrification, 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 fuel gas of pulverized coal industrial boiler
  • Denitration system and denitration method for fuel gas of pulverized coal industrial boiler

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0083] According to a specific embodiment of the present invention, the preparation method of the denitration heat storage body specifically includes:

[0084] (1) Refining of heat storage body embryo body

[0085] Mix an appropriate amount of inorganic powder, ceramic powder, binder, plasticizing moisturizing agent, and lubricant, and add an appropriate amount of deionized water for kneading and refining to obtain mud material for use.

[0086] The mud block is aged, the temperature of the aging environment is 15-25°C, and the aging time is 24h-48h. After vacuum refining and vacuum extrusion, it is made into a honeycomb body blank of the required specification.

[0087] Then, the honeycomb body blank is sent to a dryer for shaping, drying, and firing at a temperature of 1200°C to 1400°C to obtain a finished product.

[0088] (2)TiO 2 -Al 2 o 3 Preparation of composite oxides

[0089] Take a certain amount of titanyl sulfate and aluminum chloride, dissolve them in an appr...

Embodiment

[0110] The long-flame coal crushed to less than 100 μm is sprayed into the furnace of the boiler through the nozzle, mixed with the air sent into the furnace by the blower, and then burned. The temperature in the furnace can reach above 1050 °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 temperature is reduced to 250-350°C, and after preliminary dust removal by the cyclone dust removal device, it enters the integrated denitrification and thermal storage system. The flue gas whose temperature has dropped below 200°C is preliminarily dedusted by the cyclone dust removal de...

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Abstract

The invention discloses a denitration system and a denitration method for fuel gas of a pulverized coal industrial boiler. The denitration system comprises the pulverized coal industrial boiler, a cyclone separation device, a denitration heat accumulator, a desulfurization device and a chimney, wherein a reducing agent nozzle is formed in the side wall of a combustion chamber of the pulverized coal industrial boiler; the reducing agent nozzle is suitable for spraying a reducing agent into the combustion chamber, mixing the reducing agent and the flue gas of the pulverized coal industrial boiler in the combustion chamber and carrying out pre-denitration treatment; the cyclone separation device is connected with a flue gas outlet of the pulverized coal industrial boiler; the denitration heat accumulator is connected with the cyclone separation device; the denitration heat accumulator is suitable for recycling waste heat of the flue gas and carrying out denitration treatment of the flue gas; the desulfurization device is connected with the denitration heat accumulator; the chimney is connected with the desulfurization device. By utilizing the denitration system disclosed by the invention, the denitration treatment can be effectively carried out on the flue gas of the pulverized coal industrial boiler, and the denitration efficiency is remarkable.

Description

technical field [0001] The invention belongs to the field of flue gas denitration, in particular, the invention relates to a pulverized coal industrial boiler flue gas denitrification system and a denitrification method. 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 sustainable development...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/75B01D53/56B01D53/50B01D53/86B01D45/12B01J23/888F23J15/02F23J15/04
CPCB01D53/75B01D45/12B01D53/50B01D53/56B01D53/8628B01D2258/0283B01J23/002B01J23/888B01J2523/00F23J15/006F23J15/027F23J15/04
Inventor 吴道洪王志军郭科宏石为华宋敏洁
Owner SHENWU TECH GRP CO LTD
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