Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Device for preventing low-load NOX of circulating fluidized bed boiler from exceeding standard and operation method thereof

A technology of circulating fluidized bed and operation method, which is applied in the field of devices to avoid low-load NOX exceeding the standard of circulating fluidized bed boiler, can solve the problems of low SNCR denitration efficiency, etc. sexual effect

Pending Publication Date: 2020-06-19
HUANENG CLEAN ENERGY RES INST
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems existing in the prior art, the present invention provides a device for avoiding excessive NOx at low load of the circulating fluidized bed boiler, and increases the outlet temperature of the furnace of the low load boiler, thereby solving the problem of low SNCR denitrification efficiency

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
  • Device for preventing low-load NOX of circulating fluidized bed boiler from exceeding standard and operation method thereof
  • Device for preventing low-load NOX of circulating fluidized bed boiler from exceeding standard and operation method thereof
  • Device for preventing low-load NOX of circulating fluidized bed boiler from exceeding standard and operation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0031] The present invention provides a device for avoiding excessive NOx under low load of a circulating fluidized bed boiler, which includes a heat shield 4, the top of the heat shield 4 is provided with a connecting piece 5, and the connecting piece 5 runs through the top of the furnace 1. Part 5 drives the heat shield plate 4 to move and rotate. When the plate surface of the heat shield plate 4 is parallel to the water wall, the heat absorbed by the water wall in the furnace 1 is reduced. When the connecting piece 5 is rotated, the plate surface of the heat shield plate 4 is vertical. The water-cooled wall absorbs the heat in the furnace 1.

[0032] In the preferred embodiment of this embodiment, several relief pipes are arranged on the top of the furnace 1, and the slits of the plurality of relief pipes form a plurality of limit openings 8...

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 device for preventing low-load NOx of a circulating fluidized bed boiler from exceeding the standard and an operation method thereof. The device comprises a heat shielding plate, wherein the heat shielding plate is arranged in a hearth of the boiler, the heat shielding plate is used for shielding a water cooling wall in the hearth, a limiting opening is formed in the topof the hearth, a connecting piece penetrates through the limiting opening to be connected with the heat shielding plate, and the connecting piece is used for driving the heat shielding plate to move and rotate. The device has the advantages that the heat shielding plate is arranged on the surface of the water cooling wall, when the boiler runs at a low load, the water cooling wall is shielded through the heat shielding plate, and heat absorbed by the water cooling wall in the hearth is reduced, so that the flue gas temperature is indirectly increased, the outlet temperature of the low-load hearth adapts to a temperature window of SNCR, the denitration efficiency under the low load is improved, it is ensured that the NOx emission under low load meets the ultralow emission requirement, and the economical efficiency of the boiler operation is ensured.

Description

technical field [0001] The invention belongs to the field of circulating fluidized bed boilers, in particular to a method for avoiding low load NO of circulating fluidized bed boilers. X Excessive devices and operating methods. Background technique [0002] Circulating fluidized bed (CFB) boilers have the following advantages: high combustion efficiency, wide fuel adaptability, low pollutant emission intensity, good load regulation performance and efficient comprehensive utilization of resources, etc., and are widely used in power generation at home and abroad industry. [0003] For NOx emissions, there are two main control methods for CFB boilers. One is low-NOx combustion technology, which reduces the formation of NOx during the combustion process; the other is flue gas denitrification technology, which removes the generated NOx from flue gas. Flue gas denitration technology mainly includes selective non-catalytic reduction (SNCR) or selective catalytic reduction (SCR). ...

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): F23C10/18F23M5/08F23J15/02
CPCF23C10/18F23J15/02F23M5/08
Inventor 时正海茹宇高洪培王海涛孙献斌袁野林伟荣
Owner HUANENG CLEAN ENERGY RES INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com