Long front arch and secondary air composite structure of lignite-fired traveling grate boiler

A combination structure and chain grate technology, applied in the boiler field, can solve the problems of low combustion efficiency, inability to adapt to the combustion characteristics of lignite, and easy generation of black smoke, etc., and achieve the effect of high combustion efficiency

Inactive Publication Date: 2013-03-06
哈尔滨工大格瑞环保能源科技有限公司
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems that the existing chain grate cannot adapt to the combustion characteristics of lignite, which leads to low combustion efficiency and easy generation of black smoke

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
  • Long front arch and secondary air composite structure of lignite-fired traveling grate boiler
  • Long front arch and secondary air composite structure of lignite-fired traveling grate boiler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0009] The best embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings. The long front arch and secondary air combination structure of the lignite chain grate boiler includes chain grate 1, coal hopper 2, secondary air pipe 3 connected with air supply duct 10, long front arch 4, and smoke guide arch 7 . On the upper part of the air duct 10 is provided a boiler body including a left convection tube bundle flue 8 and a right convection tube bundle flue 9 for transferring the heat generated by fuel combustion to the working medium in the boiler.

[0010] When the boiler is running, the lignite in the coal hopper 2 falls on the chain grate 1, and enters the lower part of the long front arch 4 with the chain grate 1 moving from front to back. Due to the high volatile content and low ignition point of lignite , under the thermal radiation of the long front arch 4 with a relatively high temperature, the surface of the coal...

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 long front arch and secondary air composite structure of a lignite-fired traveling grate boiler. The structure comprises a traveling grate stoker, a lignite hopper, a single long front arch, composite secondary air exhaust pipes and a smoke guide arch, wherein the single long front arch is arranged inside a hearth from front to back, the composite secondary air exhaust pipes are arranged on a side wall of the hearth and positioned below the long front arch, and the smoke guide arch is used for guiding high-temperature smoke to an upper hearth. Lignite can be quickly ignited under the action of thermal radiation of the long front arch after being fed into the hearth along with the traveling grate stoker, and flame generated by combustion of the lignite and the high-temperature smoke skim through along an integral lignite bed of the traveling grate stoker from front to back and are discharged from a long front arch outlet positioned at the rear of the hearth, so that the integral lignite bed which is positioned below the long front arch and arranged on the traveling grate stoker is in a high-temperature state, and high combustion efficiency can be realized. Besides, air delivered by an air blower is sprayed into the upper side of the lignite bed positioned below the long front arch via the composite secondary air exhaust pipes, so that high-volatility matters in the lignite are guaranteed against generating black smoke due to oxygen deficiency during combustion.

Description

technical field [0001] The invention relates to the field of boilers, in particular to a combined structure of a long front arch and a secondary air of a lignite-fired chain grate boiler. Background technique [0002] Lignite, also known as firewood coal, is the inferior coal with the lowest degree of coalification. Lignite has high water content, high volatile content, low ignition point, easy to catch fire, low carbon content, and low calorific value. In my country, lignite resources are mainly distributed in eastern Inner Mongolia, Yunnan East, Northeast and South China There are also certain reserves. Due to the above-mentioned combustion characteristics of lignite, at present, boilers can only burn lignite by adopting pulverized coal combustion, fluidized bed and reciprocating grate combustion. The traditional chain grate combustion method adopts a short front arch and a long rear arch. The front arch is higher than the rear arch, and the combined furnace arch stru...

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): F23M5/06F23L9/00
Inventor 董芃
Owner 哈尔滨工大格瑞环保能源科技有限公司
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