Coal pulverizing system and method suitable for high-moisture coal types

A high-moisture coal, pulverizing system technology, applied in combustion methods, block/powder fuel preparation, lighting and heating equipment, etc., can solve problems affecting boiler load capacity, low secondary air rate, primary air duct wear aggravation, etc.

Pending Publication Date: 2020-12-22
XIAN THERMAL POWER RES INST CO LTD
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The primary air temperature at the outlet of the air preheater of the bituminous coal-fired boiler unit is generally designed at 280°C-320°C. To meet the drying demand, when the cold air door of the coal mill is fully closed, the drying capacity of the hot primary air is still insufficient, resulting in insufficient drying output of the coal mill, which affects the load capacity of the boiler
[0004] In order to increase the drying output of the coal mill, it...

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
  • Coal pulverizing system and method suitable for high-moisture coal types

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

[0028] Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art wi...

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 coal pulverizing system and method suitable for high-moisture coal types. The coal pulverizing system comprises a primary air fan, an air preheater, a hot primary air pipe, acold primary air pipe, a hot air adjusting door, a cold air adjusting door, a heating device, a coal mill, a controller, a hot primary air quantity measuring device, a coal mill outlet temperature measuring device and a primary air pulverized coal pipe. Cold air at an outlet of the primary air fan is divided into two paths: one path directly enters an inlet pipeline of the coal mill through the cold primary air pipe, and the other path enters the air preheater to be heated, the heated hot primary air is reheated by the heating device and then enters the inlet pipeline of the coal mill to be mixed with the cold primary air, and the mixed hot air enters the coal mill to dry pulverized coal, so that the purpose of improving the drying output of the coal mill is achieved. The system can effectively improve the temperature of the hot primary air, improve the drying output of the coal mill, enhance the adaptability of the coal mill to coal moisture, prevent pulverized coal condensation andpipe blockage caused by over-low outlet temperature of the coal mill, enable a unit to burn high-moisture coal, reduce the unit price of standard coal, reduce the operating cost, facilitate safe and stable operation of the unit and achieve good economic benefits.

Description

【Technical field】 [0001] The invention belongs to the technical field of pulverizing systems in thermal power plants, and relates to a pulverizing system and method suitable for high-moisture coal. 【Background technique】 [0002] my country is rich in coal resources, and thermal power generation still occupies a dominant position in the energy power generation market. With the rapid growth of my country's economy, the consumption of coal will increase, the supply of coal will become increasingly tense, and the price of coal will continue to rise . In recent years, due to excess coal-fired unit assembly capacity, continuous rise in coal prices, and continuous reduction in power generation utilization hours, coal-fired power plants have reduced profits or even lost money. Some power plants have begun to blend economical coals with high moisture content and low calorific value. [0003] The primary air temperature at the outlet of the air preheater of the bituminous coal-fired...

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): B02C25/00B02C23/18F23K1/00F26B21/00
CPCB02C25/00B02C23/18F23K1/00F26B21/001F26B21/004
Inventor 张海龙井新经乔越杨明强王晓乾邢乐强李明磊杨辉沈植张宇博
Owner XIAN THERMAL POWER RES INST 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