Flue gas SNCR (selective non-catalytic reduction) denitration control device and method

A control method and flue gas technology, applied in separation methods, chemical instruments and methods, and separation of dispersed particles, can solve problems such as increased NOX emissions, incomplete reactions, and secondary pollution, achieving good results, improving efficiency, and reducing The effect of running costs

Active Publication Date: 2014-08-27
SHANDONG SHOUFENG ENVIRONMENTAL PROTECTION EQUIP CO LTD
View PDF9 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the temperature is too low, NH 3 The reaction is not complete, and ammonia escapes, causing secondary pollution; when the temperature is too high, N

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
  • Flue gas SNCR (selective non-catalytic reduction) denitration control device and method
  • Flue gas SNCR (selective non-catalytic reduction) denitration control device and method
  • Flue gas SNCR (selective non-catalytic reduction) denitration control device and method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0062] Example 1: A flue gas denitration SNCR device, set the ammonia concentration at the outlet to be 10ppm, and the NO at the outlet X The concentration requirement is 80ppm. The sensor measured the ammonia concentration Y at the outlet as 9ppm, and the NO at the outlet X The concentration A is 100 ppm. According to the adaptive control system, A / Y is greater than the set value 8. The PLC controller automatically controls the PID to increase the speed of the reductant feed pump to make NO X The outlet concentration meets the set requirements.

Example Embodiment

[0063] Example 2: A flue gas denitration SNCR device, the ammonia concentration at the outlet is set to 10ppm, and the NO at the outlet X The concentration requirement is 70ppm. The sensor measured the ammonia concentration Y at the outlet as 9ppm, and the NO at the outlet X The concentration A is 80 ppm. According to the adaptive control system, A / Y is less than the set value 8. PLC controller automatic PID control increases the speed of the air compressor to make NO X The outlet concentration meets the set requirements.

Example Embodiment

[0064] Example 3: A flue gas denitration SNCR device, set the ammonia concentration at the outlet to be 10ppm, and the NO at the outlet X The concentration requirement is 80ppm. The sensor measured that the ammonia concentration at the outlet was 18ppm, and the NO at the outlet X The concentration is 60 ppm. According to the adaptive control system, A / Y is less than the set value 8. The system calculates the PLC controller automatic PID control to reduce the speed of the reductant feed pump and prevent the escape of ammonia.

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 flue gas SNCR (selective non-catalytic reduction) denitration control method. A field detection module and an adaptive control module are adopted, wherein the field detection module is used for measuring the temperature T above a grate of a boiler, the nitrogen oxide concentration of tail gas of the boiler, the ammonia concentration of a reducing agent, the flow of flue gas and the temperature of cooling water of a spray gun by using sensors; the adaptive control module is used for transmitting values measured by the sensors to a PLC (programmable logic controller) unit to adaptively control the position of the spray gun, the amount of the supplied reducing agent and the spraying pressure of the reducing agent, and displaying the working condition of a whole device on a display module. The sensor is used for measuring the temperature T above the grate, and corresponding nozzles are opened according to the following relationships.

Description

technical field [0001] The invention relates to flue gas SNCR denitrification technology for preventing and controlling air pollution, in particular to a flue gas denitrification control device and a control method for use thereof. Background technique [0002] my country's energy consumption is dominated by coal, and a certain amount of nitrogen oxides (NO X ), NO X are containing different amounts of NO and NO 2 Get the general name of the gas. NO X It is a toxic gas, which not only seriously endangers the health of the human respiratory system and cardiovascular system, causes pulmonary edema and even canceration, but also is one of the main causes of acid rain and photochemical pollution, destroys the ozone layer, damages animals and plants, and causes the greenhouse effect. At present, about 65% of nitrogen oxides in China are produced by coal combustion. Therefore, as the main coal-fired equipment, power plant boilers, industrial boilers, cement kilns, etc. X The ...

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): B01D53/79B01D53/56
Inventor 纪正飚王如刚周锋
Owner SHANDONG SHOUFENG ENVIRONMENTAL PROTECTION EQUIP CO LTD
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