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

Zhundong coal circulating fluidized bed boiler and control method thereof

A circulating fluidized bed and control method technology, applied in fluidized bed combustion equipment, combustion methods, indirect carbon dioxide emission reduction, etc. Guaranteed reliability, low operating costs, and improved thermal efficiency

Inactive Publication Date: 2019-07-23
XIANGTAN BOILER
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The soot blower cannot blow off the contaminated things on the heating surface, the boiler slagging, the tail heating surface slagging, pipe burst, high temperature corrosion is serious, and the high slagging and pollution characteristics of Zhundong coal burned or mixed Seriously affect the safe and normal operation of the boiler

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
  • Zhundong coal circulating fluidized bed boiler and control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] see figure 1 , the aspect ratio of the furnace 5 is 1.5-2.5, the drum 7 is arranged above the furnace 5, and the secondary air is configured; The inclination angle of the furnace is ≥15°, and there are 2 coal drop ports in the dense-phase positive pressure zone of 5 buried pipes in the furnace, and there are coal sowing air and coal conveying air to prevent coal blocking. The three-pass structure of the furnace includes front, rear, left, right and middle two light-tube film-type wall heating surfaces, that is, the cross-section is the same or similar to the characters "日" and "日", forming a three-pass flue gas channel. It forms a "U"-shaped flue gas channel with the second return, the second return and the third return, and at the same time, it also prolongs the burning residence time of the particles in the furnace. A sanitary combustion belt is laid on the heating surface of the membrane wall on the upper part of the first return furnace, and the combustion temperat...

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 Zhundong coal circulating fluidized bed boiler and a control method thereof. A heating surface comprises burying pipes and a membrane wall. A hearth comprises three-pass fluegas channels. The section of the channel comprises a front, rear, left, right and middle portions of the membrane wall, and is in the shape similar to the Chinese character "ri" or "yue", and a U-shaped flue gas channel is formed between a first pass and a second pass as well as between the second pass and a third pass. Secondary air is arranged; a cyclone separator is arranged outside the hearth;tail shaft flue convection heating surfaces are arranged at coarse pitches in sequence, the hearth dense-phase zone fluidizing velocity is 3-4m / s, and the burning temperature is 850-900 DEG C; and the tail shaft convection heating surface inlet temperature is 400 DEG C-600 DEG C. According to the Zhundong coal circulating fluidized bed boiler and the control method thereof, the problems of ash deposition, slag bonding and corrosion of Xinjiang Zhundong coal burning of the circulating fluidized bed boiler can be well solved, and the boiler continuous operation reliability is guaranteed.

Description

technical field [0001] The invention relates to a boiler and its control method, in particular to a Zhundong coal circulating fluidized bed boiler. Background technique [0002] The coal quality in the Zhundong Coal Mine area of ​​Xinjiang has the following characteristics: (1) medium and high moisture content; (2) medium calorific value; (3) small coal bulk density; (4) easy to catch fire and burn out; (5) strong coking; (6) High alkali metal content, strong staining; (7) The ash melting point of each mine is quite different. At present, the biggest factors restricting the application of Zhundong coal in boilers are coking, contamination and ash accumulation caused by contamination. The main factor causing this problem lies in the characteristics of coal itself, and the high alkali metal content in coal ash is the biggest cause of boiler slagging, contamination and ash accumulation. [0003] Similar problems have occurred in boilers that burn Xinjiang Zhundong coal. 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
Patent Type & Authority Applications(China)
IPC IPC(8): F23C10/08F23C10/18F23L9/00F23L15/02
CPCF23C10/08F23C10/18F23L9/00F23L15/02Y02E20/34
Inventor 宋平唐跃王志平陈帅男刘庆何军刘启文爱兰刘丽红刘定宇李劼王楚陈鹏王嘉鑫
Owner XIANGTAN BOILER
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