Unlock instant, AI-driven research and patent intelligence for your innovation.

Air pre-heater blockage operation detection method, system and device

A technology of operation detection and air preheater, which is used in measuring devices, testing of machine/structural components, instruments, etc., can solve the problems of lag, insensitive judgment, uneven airflow in the outlet flue, etc., to achieve sensitive response and prevent further The effect of deterioration and strong reliability

Inactive Publication Date: 2020-09-04
STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST +1
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: to solve the problem that in the prior art, the way of monitoring the clogging of the air preheater by differential pressure monitoring is not sensitive enough and the lag is serious due to the wide flue at the outlet of the air preheater and the uneven air flow

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
  • Air pre-heater blockage operation detection method, system and device
  • Air pre-heater blockage operation detection method, system and device
  • Air pre-heater blockage operation detection method, system and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] This embodiment provides an operation detection method for air preheater clogging, including:

[0030] Obtain the actual wind speed in the bypass sealed space between the air preheater casing and the air preheater rotor;

[0031] Correct the actual wind speed in the sealed space of the bypass according to the difference between the coal quality in the actual operation of the air preheater and the coal quality in the clean state;

[0032] When the corrected actual wind speed is within 50% higher than the theoretical wind speed in the clean state of the air preheater, it is determined that the air preheater is slightly blocked; when the corrected actual wind speed is 50-70% higher than the theoretical wind speed %, it is determined that the air preheater is moderately blocked; when the corrected actual wind speed is 70% higher than the theoretical wind speed, it is judged that the air preheater is severely blocked.

[0033] The air preheater rotates slowly with the heat ...

Embodiment 2

[0053] This embodiment provides an operation detection system for air preheater clogging, including:

[0054] The data acquisition module is used to acquire the actual wind speed in the bypass sealed space between the air preheater casing and the air preheater rotor;

[0055] The wind speed correction module is used to correct the actual wind speed in the sealed space of the bypass according to the difference between the quality of coal burned in the actual operation of the air preheater and the quality of coal burned in the clean state;

[0056] The analysis and judgment module is used to determine that the air preheater is slightly blocked by dust when the corrected actual wind speed is higher than the theoretical wind speed in the clean state of the air preheater within 50%; when the corrected actual wind speed is higher than When the theoretical wind speed is 50-70%, it is determined that the air preheater is moderately blocked by dust; when the corrected actual wind speed...

Embodiment 3

[0059] This embodiment provides an operation detection device for blockage of the air preheater, such as figure 1 As shown, it includes: a wind speed measurement component, a signal transmission device and a DCS (Distributed Control System, Distributed Control System) module, the signal transmission device includes a transmitter, and the DCS module has a built-in wind speed correction module and an analysis and judgment module;

[0060] The speed measuring end of the wind speed measuring assembly is arranged in the bypass sealed space between the air preheater casing and the air preheater rotor according to predetermined rules, and is used to measure the primary air or secondary air in the bypass sealed space of the cold end of the air preheater. wind pressure;

[0061] The output end of the wind speed measurement component is connected to the input end of the conversion correction module through a transmitter, and the wind speed correction module is used for calculating and p...

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 relates to an air pre-heater blockage operation detection method, system and device. The method comprises the steps: detecting the wind speed in a bypass sealing space of an air pre-heater, comparing the actual wind speed in the bypass sealing space with the theoretical wind speed in a clean state of the air pre-heater in the operation process of the air pre-heater, and judging the blockage condition of the air pre-heater. Compared with a traditional method, the method has the advantages that the blockage tendency of the air pre-heater can be reflected as soon as possible, operators can adjust the soot blowing frequency in time and fuel personnel can adjust fuel conveniently, blockage of the air pre-heater is avoided or relieved in a targeted mode, a passive mode is changed into an active mode, and safe and reliable operation of the air pre-heater is guaranteed.

Description

technical field [0001] The present application belongs to the technical field of air preheater detection, and in particular relates to an operation detection method, system and device for air preheater clogging. Background technique [0002] Most of the air preheaters of large and medium-sized coal-fired generating units are two-chamber or three-chamber rotary air preheaters. The main function of the air preheater is to use the waste heat of the flue gas discharged from the combustion of the boiler to heat the primary and secondary air sent by the primary fan and the blower. The powder is sent into the furnace, and the secondary air is heated to the required temperature and enters the furnace to provide sufficient air for combustion and ensure efficient and complete combustion of the coal powder. While the flue gas heats the cold air, it also makes full use of the waste heat to reduce the loss of the boiler exhaust. [0003] The operating status of the air preheater has an...

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): G01M99/00
CPCG01M99/005
Inventor 李玲李敏张步庭刘静宇秦淇
Owner STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com