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

Method and device for determining boiler operation oxygen content and automatic control system

A technology for boiler operation and operating oxygen content, which is applied in the combustion method, combustion control, lighting and heating equipment, etc., to achieve the effect of high-efficiency combustion of NOx concentration

Active Publication Date: 2016-04-13
NORTH CHINA ELECTRICAL POWER RES INST +1
View PDF6 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention solves the existing low NO x Combustion technology cannot maintain a low level of NO at the furnace outlet while ensuring high-efficiency combustion x Concentration problem, and then proposed a method, device and automatic control system for determining the amount of oxygen in boiler operation, specifically including the following technical solutions:

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
  • Method and device for determining boiler operation oxygen content and automatic control system
  • Method and device for determining boiler operation oxygen content and automatic control system
  • Method and device for determining boiler operation oxygen content and automatic control system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] exist image 3 Under the predetermined steady load shown, CO and NO in flue gas at the denitrification inlet x The specific values ​​of concentration and operating oxygen amount are shown in the table below. According to CO less than 600mg / m 3 The principle of filtering out the first five rows of data, and calculating the corresponding k j Values ​​are shown in the last column of the table, in order of k j The principle of minimum determines that the optimal operating oxygen level under this load is 3.25%.

[0044]

[0045] for Figure 4The best operating oxygen curve of a boiler with a capacity of 2000t / h is shown, and the main steam flow of the boiler is the boiler load. Example of interpolation by finding optimal operating oxygen for any boiler load. For example: the current boiler load (main steam flow) is 1200t / h, at Figure 4 Between (950,5.7) and (1440,3.5) in the two points, there are:

[0046] O 2...

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 method and device for determining boiler operation oxygen content and an automatic control system. The method comprises the steps that the CO concentration and NOx concentration of smoke gas in a denitration inlet at a preset operating point are obtained; the NOx concentration curve rate produced when the CO concentration in the smoke gas in the denitration inlet is smaller than a preset value is determined; according to the operation oxygen content value corresponding to the minimum value of the curve rate, the boiler operation oxygen content is determined. The optimal operation oxygen content of a low-NOx combustion boiler can be rapidly determined through the NOx concentration curve rate produced when the CO concentration in the smoke gas in the denitration inlet is smaller than the preset value, the operation oxygen content of the boiler is automatically controlled, high-efficiency combustion is ensured, and meanwhile the low-level hearth outlet NOx concentration can be kept.

Description

technical field [0001] The invention relates to a method, a device and an automatic control system for determining the oxygen amount in boiler operation, and belongs to the technical field of oxygen amount control in boiler operation. Background technique [0002] In the prior art, in order to reduce NO x emission concentration, pulverized coal boilers usually use low NO x combustion technology. Compared with traditional pulverized coal combustion technology, low NO x Combustion technology has the advantages of low investment and operating costs, mature technology, and obvious emission reduction effects. combine figure 1 shown, existing low NO x Combustion technology mainly constructs a reduction zone between the main combustion zone and the burnout zone through the separated burn-off air, and uses the reducing gas produced by the under-oxygen combustion in the main combustion zone to reduce the small amount of NO generated by combustion in the main combustion zone x ,...

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): F23N3/00
CPCF23N3/00
Inventor 李金晶付俊杰张清峰赵振宁焦开明赵计平韩志成李乐义
Owner NORTH CHINA ELECTRICAL POWER 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