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

Device and method for adjusting powder quantity deviation of powder pipes of direct blowing type pulverizing system

A pulverizing system and direct blowing technology, which is applied in the direction of combustion method, block/powder fuel preparation, block/powder supply/distribution, etc. It can solve the problems of unbalanced combustion output, large thermal deviation, and difficult control, etc. problems, achieve the effect of reducing wear, eliminating thermal deviation, and reducing powder volume

Active Publication Date: 2015-09-09
DONGFANG BOILER GROUP OF DONGFANG ELECTRIC CORP
View PDF10 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual operation and debugging, it is found that even after the air volume of each powder pipe of the same mill is adjusted, the powder volume may still have a large deviation, and the randomness is large, which is difficult to control
The deviation of the powder quantity of each powder tube causes the combustion output of the boiler to be unbalanced along the furnace width (hedge combustion, w flame combustion boiler) or four corners (tangential combustion boiler), resulting in large screen, height, height, and wall at the furnace outlet. Such as large thermal deviation on both sides of the heating surface, local overheating, large desuperheating water and other problems, and at the same time cause adjustment obstacles to the control of the discharge of ash, slag, NOx and other pollutants in the furnace

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
  • Device and method for adjusting powder quantity deviation of powder pipes of direct blowing type pulverizing system
  • Device and method for adjusting powder quantity deviation of powder pipes of direct blowing type pulverizing system
  • Device and method for adjusting powder quantity deviation of powder pipes of direct blowing type pulverizing system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033]This embodiment discloses a device specially used to adjust the powder volume of each powder tube of the coal mill, and adjust the powder volume of each powder tube without affecting the air volume leveling of each powder tube, so as to achieve leveling The purpose of the amount of powder in each powder pipe of the coal mill is to eliminate the problem of large deviations in the combustion heat of the boiler caused by the uneven distribution of powder in each powder pipe of the coal mill, to prevent or weaken the local overheating of each heating surface at the furnace outlet, and to protect the heating surface , so that the boiler operates efficiently, safely and economically.

[0034] Such as figure 1 As shown, a device for adjusting the powder amount deviation of each powder pipe of the direct blowing type powder making system includes a main powder pipe 101, and an air-powder separation cylinder 103 is arranged on the side of the main powder pipe 101, and the main po...

Embodiment 2

[0045] Due to the deviation of the amount of powder in the primary air leveling method of the existing direct blowing type pulverizing system, the combustion intensity of the furnace is uneven, which has a negative impact on the economical and safe operation of the boiler. The method for the deviation of the amount of powder in each powder tube of the powder making system.

[0046] The invention discloses a method for adjusting the powder quantity deviation of each powder tube of a direct blowing type pulverizing system, which comprises the following steps:

[0047] S1: Set the first branch pipe 102 on the upstream main powder pipe 101 to form the first air powder bypass, and connect the air powder bypass with the air powder separation cylinder 103 arranged on the side of the main powder pipe 101, so that once The wind powder enters the wind powder separation cylinder 103;

[0048] By setting the first branch pipe 102, after the primary air powder enters the main powder pipe ...

Embodiment 3

[0060] Such as figure 2 As shown, in this embodiment, an air locker 107 is provided between the pulverized coal downcomer 106 and the coal feeder. For the existing 300MW four-corner tangential combustion boiler, the medium-speed mill direct-blowing pulverization system, the outlet of a single mill has 4 main powder pipes 101, which are respectively the first powder pipe 108, the second powder pipe 109, and the third powder pipe 110 , the fourth powder pipe 111, on each of the above-mentioned main powder pipes 101, install figure 1 The adjustment device described in is used to adjust the deviation of the powder amount of each main powder pipe 101. Air lockers 107 are arranged on each pulverized coal downcomer 106 .

[0061] Such as image 3 As shown, for a 660MW opposed combustion boiler, a medium-speed mill direct-blowing pulverization system, there are three main powder pipes 101 at the outlet of a single mill, which are respectively the first powder pipe 108, the second ...

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 device for adjusting the powder quantity deviation of powder pipes of a direct blowing type pulverizing system. The device comprises a main powder pipe, an air and powder separating barrel is arranged on one side of the main powder pipe, the main powder pipe is connected with the upper end of the air and powder separating barrel through a second branch pipe, the main powder pipe is connected with the lower portion of the air and powder separating barrel through a first branch pipe, the lower end of the air and powder separating barrel is connected with a coal dust descending pipe, and a bypass regulation door is arranged on the second branch pipe; meanwhile, a method for adjusting the powder quantity deviation of the powder pipes of the direct blowing type pulverizing system is disclosed. Leveling of the powder quantity of the powder pipes and leveling of heat-state primary air adjustment of a boiler can be achieved at the same time, simultaneous leveling of primary air and powder of one grinding device can be achieved, and the commonly-occurring heat deviations caused by the unbalanced powder quantity of the powder pipes of the same grinding device at present are eliminated.

Description

technical field [0001] The invention relates to a device and a method for adjusting the powder amount deviation of each powder tube of a direct blowing type pulverizing system, which is mainly used in the field of boiler manufacturing and transformation. Background technique [0002] At present, pulverized coal boilers in the industry mainly include four-corner tangential combustion, front and rear wall opposite combustion and W flame combustion boilers, most of which adopt direct blowing pulverization systems. The system does not have a separate powder mixing function. It is believed that the air in each powder pipe of the same mill is balanced, and the powder will be balanced. This is also the main processing method in the industry at present. Even after the primary wind is leveled, there is still a large deviation in the amount of powder, and there is no good solution at present. The deviation of the powder volume of each powder tube of the same mill will cause uneven co...

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): F23K1/00F23K3/02
Inventor 柏江钊陈灿周棋刘泰生马晓伟
Owner DONGFANG BOILER GROUP OF DONGFANG ELECTRIC CORP
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