Measurement method of coal mill entrance ventilation quantity

A measurement method, coal mill technology, applied in the direction of grain processing, etc., can solve the problems of low precision and large deviation of the measurement results of the ventilation volume at the entrance of the coal mill, and achieve the effect of improving efficiency, small deviation and reasonable measurement accuracy

Inactive Publication Date: 2014-07-16
ANHUI HUADIAN SUZHOU POWER GENERATION +1
View PDF5 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides an optimized method for measuring the ventilation volume at the coal pulverizer inlet, aiming at the problems of large deviation and very low precision in the measurement results of the ventilation volume at the entrance of the coal pulverizer

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
  • Measurement method of coal mill entrance ventilation quantity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0039] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0040] Aiming at the structural characteristics of the existing coal mill, the present invention proposes a method for indirectly measuring the air volume at the inlet of the coal mill according to the industrial analysis data and actual operating parameters of the coal mill for grinding coal, and adopting a heat balance method.

[0041] The method is implemented based on a corresponding intelligent measuring device, and the intelligent measuring device mainly includes a corresponding sensing and measuring device, a computing center (or computing unit) and a data storage unit.

[0042] Among them, the sensing and measuring device has several sensors, which are used to obtain various raw data required for measuring the air volume at the inlet of t...

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 soft measurement method of the coal mill entrance ventilation quantity. The soft measurement method comprises the measuring steps: firstly, presetting the coal mill entrance ventilation quantity G (t/h), after completing calculation of a coal mill entrance air temperature Ti1 (DEG C), triggering a calculating unit to extract a stored coal mill entrance temperature Ti (DEG C), comparing with the coal mill entrance air temperature Ti1 obtained by calculation, calculating out a coal mill entrance air temperature difference value dTi, and storing; after completing calculation of the coal mill entrance air temperature difference value dTi, triggering the calculating unit to extract the stored coal mill entrance air temperature difference value dTi, and comparing and judging with 1: if the dTi is less than 1, the preset coal mill entrance ventilation quantity G (t/h) is the current coal mill entrance actual ventilation quantity; and if the dTi is greater than or equal to 1, the preset coal mill entrance ventilation quantity G (t/h) is wrong, the coal mill entrance ventilation quantity G (t/h) is required to be anew preset, measurement is carried out again until the dTi is less than 1. The measurement result has high precision, and is convenient for optimization and adjustment of operation of a pulverizing system.

Description

technical field [0001] The invention relates to a soft measurement method of ventilation volume, in particular to a measurement method of coal mill inlet ventilation volume. Background technique [0002] With the increase of the unit capacity of the thermal power plant and the improvement of the coordination control level, the accurate measurement and control of the air volume of the boiler unit is more important; especially the inaccurate measurement of the air volume at the entrance of the coal mill often leads to the control of air volume and fuel volume, Boiler load coordination cannot be put into automatic operation, which also causes poor combustion conditions, lower boiler operating efficiency, and coal mill blockage and tripping due to insufficient ventilation of the coal mill, which brings hidden dangers to the safe and economical operation of the boiler. [0003] The pulverized coal burner of the power plant boiler needs to maintain an appropriate air-to-coal ratio...

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 Applications(China)
IPC IPC(8): B02C23/00B02C25/00
Inventor 张代新郭西清张宁全文涛吕晓东王健
Owner ANHUI HUADIAN SUZHOU POWER GENERATION
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