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

A denitrification system, its control method, and ammonia injection control device

A control method and denitrification technology, applied in ammonia injection control device, denitrification system and its control field, can solve problems such as poor adaptability and complicated control, and achieve the effect of controlling concentration fluctuations

Active Publication Date: 2022-03-22
郑州景旭能源科技有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a denitrification system control method based on instant sensitive parameters, which is used to solve the problems of complex control and poor adaptability in the prior art

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
  • A denitrification system, its control method, and ammonia injection control device
  • A denitrification system, its control method, and ammonia injection control device
  • A denitrification system, its control method, and ammonia injection control device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings. This implementation mode relates to a system embodiment, a method embodiment, and a device embodiment, which are described in sequence below.

[0029] System embodiment:

[0030] Such as figure 1 In the shown denitrification system, the denitrification reactor is divided into three zones, zone 1, zone 2 and zone 3; each zone corresponds to zone 1, zone 2 and zone 3 on the inlet side, and zone 1 on the outlet side. NOx concentration sensors 101, 102, and 103 are installed in the first entrance area, the second entrance area, and the third entrance area; the NOx concentration sensors are installed in the first exit area, the second exit area, and the third exit area 201, 202, 203, and concentration sensors 301, 302, 303 of NH3. figure 1 In the denitrification system, there is one ammonia injection master control valve 400 and three ammonia in...

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 present invention relates to a denitrification system and its control method and ammonia injection control device. The method includes determining instant sensitive parameters, and preset hierarchical sensitivity coefficients for each type of instant sensitive parameters; determining partition sensitivity coefficients; calculating comprehensive sensitivity coefficients; The changes of the immediate sensitive parameters and the corresponding comprehensive sensitivity coefficients are weighted and summed to calculate the opening adjustment amount of the ammonia injection sub-control valve in each zone; adjust the ammonia injection sub-control valve in each zone in real time according to the opening adjustment amount. The invention can control the fluctuating range of nitrogen oxide concentration at the outlet of the denitrification reactor and keep the escape amount of ammonia within a small range, and has good application value.

Description

technical field [0001] The invention belongs to the technical field of air pollution control of coal-fired boilers, and in particular relates to a denitrification system, a control method thereof, and an ammonia injection control device. Background technique [0002] Generally, the denitrification reaction of coal-fired boilers in thermal power plants is located in the SCR reactor in the rear stage of the economizer. There is a large delay from the time when the reducing agent adjustment command is issued, after the denitrification reaction occurs, to the detection of NOx changes at the main exhaust port. (Generally, when the reducing agent is liquid ammonia, it takes about 5 minutes, and when the reducing agent is urea pyrolysis, it takes up to 15-20 minutes). [0003] With the operation of the denitrification system, the flow guide elements in the SCR flue are affected by the design, installation or wear, and the flue gas velocity field, temperature field, and fly ash conc...

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 Patents(China)
IPC IPC(8): B01D53/90B01D53/56B01D53/30G05B13/04
CPCB01D53/90B01D53/8631B01D53/30G05B13/042B01D2251/2062B01D2258/0283
Inventor 赵彤宇郝志国唐皖如宋艳珂董亚坤
Owner 郑州景旭能源科技有限公司
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