Circulating fluidized bed coal boiler denitration method

A circulating fluidized bed and coal-fired boiler technology, which is applied in the field of high-temperature flue gas denitrification system, can solve the problems of low denitrification efficiency, achieve high denitrification efficiency, simplify the denitrification process, and reduce the amount of ammonia escape

Inactive Publication Date: 2014-08-20
SOUTHEAST UNIV
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Technical problem: In order to overcome the shortcomings of low denitrification efficiency of SNCR denitrification technology

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
  • Circulating fluidized bed coal boiler denitration method
  • Circulating fluidized bed coal boiler denitration method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] 1. A new denitration method for a circulating fluidized bed coal-fired boiler, comprising a coal-fired boiler 1, a cyclone separator 2, a corona-free electron emission cathode reactor 6, a liquid atomization spray gun 7, a liquid storage tank and a regulating valve 8 .

[0023] 2. The upper and lower parts of one side of the furnace 1 are respectively connected with one end of the horizontal flue and the return pipe, the other end of the horizontal flue is connected with the inlet 2 of the cyclone dust collector, and the upper and lower outlets of the cyclone separator 2 are respectively connected with the non-corona type electron emission The inlet pipe of the cathode 3 reactor is connected to one end of the return pipe, and there is no corona-type electron emission cathode reactor.

[0024] 3. Arrange a reducing agent injection device near the exit of the furnace 1 tail. The reducing agent is 8% to 15% ammonia solution.

[0025] 4. The ammonia solution flow control ...

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 provides a circulating fluidized bed coal boiler denitration method combining SNCR (selective non-catalytic reduction) denitration technology and non-corona emission electron technology, ammonia solution is sprayed into a furnace outlet by an atomization spray gun, and enters into a cyclone separator along with flue gas, and in the process, ammonia is mixed with the flue gas to react with NOx in the flue gas for a preliminary SNCR reaction; the flue gas in the outlet of the cyclone separator enters into a non-corona electron emitting cathode reactor, secondary reaction is performed under the catalysis of electrons emitted by the non-corona electron emitting cathode reactor for further removal of the remaining NOx in the flue gas. According to the method, the non-corona emission electron technology is introduced into a SNCR denitration system, the circulating fluidized bed coal boiler denitration method is safe and convenient, low in construction investment, easy in disassembly and maintenance and low in operation cost, and the system combining the traditional SNCR denitration technology can increase the denitration efficiency, and reduce the amount of ammonia escape.

Description

technical field [0001] The invention relates to a high-temperature flue gas denitrification system, in particular to a new denitrification method for a circulating fluidized bed coal-fired boiler using ammonia water as a reducing agent. Background technique [0002] The control of nitrogen oxides has become an urgent objective requirement for national economic sustainable development and environmental protection. With the improvement of environmental protection regulations and environmental protection requirements, the research and improvement of high-efficiency and low-cost denitrification technology has broad prospects. SNCR denitrification technology sprays a reducing agent at the tail of the furnace within the window temperature (850-1050°C), and the reducing agent reacts with NOx in the flue gas to generate N 2 and H 2 O, to achieve the effect of denitrification. Compared with SCR denitrification, SNCR denitrification system has the characteristics of simple system a...

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
Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/79B01D53/56
Inventor 黄亚继杨高强杨亚平
Owner SOUTHEAST UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap