Integrated processing system and method thereof of improving use value of coal-fired boiler ash

A technology for coal-fired boilers and treatment systems, which is applied in the treatment of combustion products, combustion methods, combustion of solid fuels, etc., can solve the problems of large maintenance, reduce boiler combustion efficiency, affect furnace design, etc., and achieve the effect of improving efficiency.

Inactive Publication Date: 2013-06-05
BEIJING GUODIAN FUTONG SCI & TECH DEV +1
View PDF6 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 3) Since the calorific value of unburned substances in ash is far lower than that of pulverized coal, spraying a large amount of ash into the furnace will reduce the combustion efficiency of the boiler;
[0007] 4) As ash enters the furnace, which affects the original design of the furnace, the primary and secondary air volumes of the boiler need to be readjusted, and the combustion state also changes accordingly, which reduces the stability of the boiler combustion;
[0008] 5) Coarse ash and slag are transported to the cyclone separator through the pipeline. Due to the large particle size of the slag, the wear and tear on the pipeline and separator is very serious, and the maintenance amount is large

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
  • Integrated processing system and method thereof of improving use value of coal-fired boiler ash
  • Integrated processing system and method thereof of improving use value of coal-fired boiler ash
  • Integrated processing system and method thereof of improving use value of coal-fired boiler ash

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] Such as figure 1 As shown, it is mainly suitable for coal-fired boilers with a small amount of slag discharge and low combustibles in the ash. The furnace bottom combustion device 3 provided by the present invention is used for recombustion of unburned carbon in the boiler output ash;

[0094] The ash processing system is used for crushing the received boiler 1 ash and making it into usable raw materials, such as cement raw materials;

[0095] The ash handling system includes:

[0096] The ash grinding device is connected to the discharge port of the furnace bottom combustion device 3, and is used to receive the cooled ash and grind it;

[0097] Sorting device 8, its feed port is connected with the ash outlet of the ash grinding device, and is used for sorting the ground ash, qualified ash is output from its discharge outlet as available raw materials , the unqualified ash is returned to the ash inlet of the ash grinding device for further grinding.

[0098] In order...

Embodiment 2

[0109] Such as figure 2 shown, with figure 1 The difference of the marked embodiment 1 is: this embodiment is mainly used when the combustibles in the ash are relatively high, and a combustion-supporting furnace bottom combustion device 3 is provided at the bottom of the slag hopper 2, where the furnace bottom combustion device 3 The combustion bed structure is different from embodiment 1, specifically as Figure 11 to Figure 14 shown.

[0110] The combustion bed 32 has a hollow chamber 322, and a plurality of air outlet holes 323 communicating with the hollow chamber 322 are formed on the wedge-shaped bed surface 321; , for introducing the combustion-supporting gas into the combustion bed 32 to realize the reburning of the carbon in the ash on the combustion bed 32 .

[0111] Such as Figure 11 with Figure 12 As shown in the structure, the wedge-shaped bed surface 321 is provided with a plurality of airtight ventilation pipes 34 arranged at intervals, and the plurality...

Embodiment 3

[0116] Such as image 3 As shown, the difference between this embodiment and Embodiment 1 is that this embodiment is applicable to the situation where the amount of boiler bottom slag is large.

[0117] The crushing device 5 in this embodiment includes a coarse slag crusher 51, a fine slag crusher 52, and an ash conveying device 53. At the slag outlet, the outlet of the coarse slag crusher 51 is connected to the ash inlet of the slag conveying device 53, and the ash outlet of the fine slag crusher 52 is connected to the ash inlet of the grinding device 7; The fly ash discharged from the air preheater 15 and the air preheater 16 and the ash outputted by the slag conveyor 42 are transported to the fine slag crusher 52 through the slag conveying device 53 . In this embodiment, secondary crushing is performed on the ash and slag, which is beneficial to sufficient cooling of the ash and slag and maintenance of subsequent devices.

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 an integrated processing system and a method thereof of improving use value of coal-fired boiler ash. The integrated processing system comprises an ash processing system which is used for breaking and grinding of received boiler ash and manufacturing the boiler ash into available raw materials. The ash processing system comprises an ash breaking device, an ash grinding device and a separation device, the ash breaking device receives ash outputted by a boiler and breaks the ash into 100mm, the ash grinding device is used for grinding the ash after broken below 45 micrometers, the separation device is connected with an outlet of the ash grinding device and used for separating of the ash after ground, qualified ash is used as the available raw materials, and the unqualified ash is returned to the ash grinding device to continue to grind. The integrated processing system directly conducts breaking, grinding and separation processing for the ash, enables fine ash after ground not to pass through equipment, such as a coal pulverizing system, a boiler furnace, a coal economizer and an air pre-heater, keeps stability of the coal-fired boiler ash in the process of ash processing, and prevents the equipment, such as a pipeline, the coal economizer and the air pre-heater from being abraded by ash particles.

Description

technical field [0001] The invention belongs to the technical field of coal-fired boiler ash treatment, and in particular relates to an integrated treatment system and method for improving the utilization value of coal-fired boiler ash. Background technique [0002] Boiler ash is a product of thermal power plants. Its stockpiling not only takes up a lot of land, but also causes some pollution to the environment. How to improve the comprehensive utilization value of ash and make it turn waste into treasure has become a focus of research in recent years. [0003] Chinese patent document CN101002056 discloses an integrated system for extracting heavy ash, converting it into light ash and reducing unburned matter, which grinds boiler bottom slag and economizer coarse ash through a coal mill, and then passes through a boiler The burner is mixed with pulverized coal and sent into the furnace to reduce the unburned substances in the ash. The purpose of the above-mentioned patent d...

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): F23J1/00F23J3/00F23B70/00F23M11/04
Inventor 马履翱于谦刘振强陈贤飞王玉玮张晶夏春华李帅张东辉
Owner BEIJING GUODIAN FUTONG SCI & TECH DEV
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