Method and device for cleanly storing and feeding coal slurry fuel of electric power plant

A coal slime and power plant technology, which is applied in the field of clean storage and transportation of coal slime fuel and feeding materials in power plants, can solve the problems of coal slime channel clogging, power plant boiler slime supply interruption, and feeding equipment easy to coke and block, etc.

Active Publication Date: 2010-10-27
光大清洁技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the lack of reliable and applicable treatment methods and equipment for coal slime removal, homogenization, slurry retention, feeding and suction, pipe flow distribution, coal slime diversion, high-pressure pipe flow anti-backflow and combustion feed, the utilization of coal slime is limited. Promotion and popularization of combustion power generation
The existing method of transporting coal slime to power plant boilers mainly has the following deficiencies: one, coal slime is often mixed with some massive and fibrous impurities during storage and transportation, and some of these impurities are difficult to break, such as iron nuggets, iron wires, cables , steel wire ropes, etc., although some can be broken but the cost is relatively high, such as stones, gangue, wood, etc., these impurities will ca

Method used

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  • Method and device for cleanly storing and feeding coal slurry fuel of electric power plant
  • Method and device for cleanly storing and feeding coal slurry fuel of electric power plant

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] This embodiment mainly includes: coal slime rubbing equipment 1, horizontal mixing bin 2, gate valve 3, pre-pressed feeding screw 4, coal slime delivery pump 5, coal slime delivery pipeline 6, boiler slime feeder 7 , Boiler 8, coal slime rubbing equipment 1 is located above the horizontal mixing bin 2; One end is connected with the coal slime delivery pump 5, and the other end is connected with the boiler slime feeder 7, and the boiler slime feeder 7 is installed on the top of the boiler.

[0068] The functions and effects of each device of the present embodiment are as follows:

[0069] The coal slime rubbing equipment 1 is a pretreatment equipment for coal slime, which is used for the pretreatment process of coal slime, and crushes the coal slime into slurry.

[0070] The horizontal mixing bin 2 is the slurry storage equipment for coal slime, which is used for the slurry storage process, used to store the pretreated coal slime, and stirs the stored coal slime to prev...

Embodiment 2

[0087] This embodiment mainly includes: coal slime rubbing equipment 1, horizontal mixing bin 2, gate valve 3, pre-pressed feeding screw 4, coal slime delivery pump 5, coal slime delivery pipeline 6, boiler slime feeder 7 , boiler 8, check valve 9.

[0088] attached figure 2 It is the equipment workflow schematic diagram of embodiment 2, and its difference with embodiment 1 is, has increased check valve 9, and check valve 9 is installed between coal slime delivery pump 5 and coal slime delivery pipeline 6, described The check valve 9 is used to prevent the backflow of coal slime.

[0089] This embodiment includes the following steps:

[0090] Coal slime pretreatment process, coal slime slurry storage process, coal slime feeding process, coal slime pumping process, pipe flow non-return process, coal slime boiler feeding process.

[0091] After the coal slime is pumped out by the coal slime delivery pump 5, it first enters the check valve 9 and then enters the coal slime del...

Embodiment 3

[0094] This embodiment mainly includes: coal slime rubbing equipment 1, horizontal mixing bin 2, gate valve 3, pre-pressed feeding screw 4, coal slime delivery pump 5, coal slime delivery pipeline 6, boiler slime feeder 7 , Boiler 8, check valve 9, telescopic tube 10.

[0095] attached image 3 It is a schematic diagram of the equipment work flow of embodiment 3, and its difference from embodiment 2 is that an expansion tube is added, and the expansion tube is installed at one or more than one position of the coal slime delivery pipeline 6, and can also be It is installed at the connection between the coal slime delivery pipeline 6 and other equipment, and allows the coal slime to pass therethrough.

[0096] Installing the telescopic tube 10 has the following advantages:

[0097] Eliminate internal stress caused by pipe installation and environment or slime temperature changes, and facilitate disassembly and maintenance when pipe blockage and other failures occur.

[0098] ...

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Abstract

The invention provides a method for cleanly storing and feeding coal slurry fuel of an electric power plant. The method comprises the following processes of: pre-treating coal slurry, protecting and storing the coal slurry, feeding the coal slurry, pumping the coal slurry and feeding the coal slurry with a boiler. The invention also provides a device for cleanly storing and feeding the coal slurry fuel of the electric power plant. The device comprises a coal slurry pre-treating system, a coal slurry protection and storage device, a pre-pressurized feed screw (4), a flashboard valve (3), a coal slurry transmission pump (5), a coal slurry transmission pipeline (6), a rotation type dense material dividing valve (13), a coal slurry feeding device and an electric power plant boiler. The invention overcomes a plurality of defects existing in the prior art and provides the brand new method and the corresponding device for transmitting the cola slurry to the electric power plant boiler.

Description

technical field [0001] The invention relates to the field of fuel processing and transportation, in particular to a method for clean storage, transportation and feeding of coal slime fuel in a power plant and equipment for realizing the method. Background technique [0002] After the raw coal is mined, it is generally washed. The main component of the coal slime produced during the washing process is carbon, and contains impurities such as gangue and clay. After dehydration, it becomes primary coal with a solid content of 72-77%. Coal slime, the particle diameter is less than 0.5mm, and the solid calorific value is 14644-18828KJ / Kg. Primary coal slime is a viscous solid material with an apparent viscosity above 10 poise (kinetic viscosity unit), even tens of thousands of poise. Exhibits little fluidity and great cohesion. It is characterized by high ash content, fine particles, high viscosity, strong water holding capacity, and high cohesion, making it difficult to transpo...

Claims

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Application Information

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IPC IPC(8): F23K3/00F23K3/02F23C10/22
Inventor 巩长勇吴淼孙浩李建国
Owner 光大清洁技术股份有限公司
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