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Coal pulverizing system

A pulverizing system and pulverizing silo technology, applied in the direction of block/powder fuel preparation, combustion method, lighting and heating equipment, etc., can solve the problem of compaction of powder storage, low superheat of steam fire protection device, danger of occurrence, etc. question

Active Publication Date: 2013-02-13
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Generally, the superheat of the steam fire protection device is not very high. When it is sprayed into the powder bin, it is easy to condense into water and mix with coal powder. fire hazard

Method used

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Embodiment Construction

[0020] The present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0021] Such as figure 1 As shown, it is a schematic structural diagram of an embodiment of the powder making system of the present invention, including a powder bin 11, the powder bin includes an upper cover, and a nitrogen making device 12 is also included;

[0022] The upper cover of the powder bin 11 is provided with a nitrogen filling port, and the outlet of the nitrogen making device 12 is connected to the nitrogen filling port of the powder bin 11 through a pipeline; multiple nitrogen filling ports can be set, and can be arranged in the powder bin At the side position of the upper cover, each pipeline is horizontally inserted into the nitrogen filling port of the upper cover, which can prevent the coal powder from flying after the nitrogen gas rushes into the powder bi...

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Abstract

The invention discloses a coal pulverizing system which comprises a coal powder cabin. The coal powder cabin comprises an upper cover, wherein further comprises nitrogen generating equipment. A nitrogen charging inlet is arranged on the upper cover of the coal powder cabin, and the outlet of the nitrogen generating equipment is connected with the nitrogen charging inlet of the coal powder cabin through pipe lines. The coal pulverizing system uses the nitrogen generating equipment as a flame protection device, and continuous nitrogen sources can be provided for the coal powder cabin of a pulverized coal boiler. Nitrogen can be produced under normal temperature, process is simple, energy consumption is small and cost is low. The nitrogen enters the coal powder cabin through pipe lines, and can reduce oxygen content, plays a role of oxygen isolation and carries out inerting to the internal portion of the coal powder cabin, and forms a good nitrogen protection layer; and meanwhile coal powder can be prevented from low temperature clotting, and has no smoldering danger. The safety performance and the reliability of the coal pulverizing system are greatly improved.

Description

technical field [0001] The invention relates to the technical field of pulverized coal equipment, in particular to a pulverizing system. Background technique [0002] Coal powder is irregular coal particles, its particle size is generally 0 ~ 50μm, of which 20 ~ 50μm particles account for the majority. Dry pulverized coal can absorb a large amount of air, has good fluidity, and is easy to transport in the pipeline just like a fluid. Not only has the tendency of spontaneous combustion during storage and transportation, but also may explode. [0003] A common pulverization system generally consists of a raw coal hopper, a coal feeder, a low-speed steel ball mill, a sawdust separator, a coarse powder separator, a fine powder separator, a gas lock, a pulverized coal bin, a pulverizer, and a powder discharger. machine and explosion-proof door and other equipment. Qualified pulverized coal produced by the entire pulverizing system is temporarily stored in the pulverized coal bi...

Claims

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Application Information

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IPC IPC(8): F23K1/00B01D53/047
Inventor 李德波
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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