Unlock instant, AI-driven research and patent intelligence for your innovation.

Powdered coal industrial boiler flue gas denitrifying system and denitrifying method

A technology for industrial boilers and pulverized coal, 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: 2017-03-22
SHENWU TECH GRP CO LTD
View PDF0 Cites 2 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Powdered coal industrial boiler flue gas denitrifying system and denitrifying method
  • Powdered coal industrial boiler flue gas denitrifying system and denitrifying method

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

[0116] 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 the oxide passes through the convection tube bundle installed at the flue gas outlet of the furnace to heat the demineralized water in it.

[0117] The flue gas whose temperature is lowered to 500°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 reductio...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a powdered coal industrial boiler flue gas denitrifying system and a denitrifying method. The denitrifying system comprises a powdered coal industrial boiler, a cyclone separation device, a denitrifying device, an air preheater, a desulfurizing device and a chimney, wherein a reducing agent nozzle is arranged on the side wall of a hearth of the powdered coal industrial boiler, and the reducing agent nozzle is suitable for spraying a reducing agent into the hearth, so that the reducing agent is mixed with the powdered coal industrial boiler flue gas in the hearth and the pre-denitrifying treatment is performed; the cyclone separation device is connected with a flue gas outlet of the powdered coal industrial boiler; a denitrifying catalyst is placed in the denitrifying device, and the denitrifying device is connected with a cyclone separator and is suitable for denitrifying the flue gas; the air preheater is connected with the denitrifying device and is suitable for preheating the oxygen-containing gas by use of the waste heat of the flue gas; the desulfurizing device is connected with the air preheater; and the chimney is connected with the desulfurizing device. By adopting the denitrifying system, the powdered coal industrial boiler flue gas can be effectively denitrified, and the denitrifying 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
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 吴道洪宋敏洁王东方田中君杨玉地
Owner SHENWU TECH GRP CO LTD