Ignition prevention method and ignition prevention apparatus for crusher

A pulverizer and adjustment mechanism technology, applied in the directions of combustion method, supply configuration, block/powder fuel preparation, etc., to achieve the effect of preventing fire, preventing fire and explosion

Active Publication Date: 2013-01-23
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0019] However, at present, there is no operating index for solid f

Method used

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  • Ignition prevention method and ignition prevention apparatus for crusher
  • Ignition prevention method and ignition prevention apparatus for crusher
  • Ignition prevention method and ignition prevention apparatus for crusher

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Embodiment Construction

[0037] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In addition, in the following embodiments, coal is used as a solid fuel and described, but the solid fuel is not limited thereto, and may be biomass fuel, sludge carbide, etc., and coal, biomass fuel, etc. may also be used. , Sludge carbide, etc. Two or more.

[0038] (The structure of the fire prevention device of the pulverizer)

[0039] The fire prevention device 10 of the pulverizer of this embodiment, such as figure 1 As shown, it has the following: coal supply adjustment device (supply adjustment mechanism) 3a, 3b, which adjusts the supply of coal A, B supplied from coal hopper 1, 2 to mixer 4; concentration measuring device (concentration Measuring mechanism) 7, which measures the concentration of carbon monoxide in the gas at the outlet of pulverizer 5; calculator (storage mechanism, control mechanism) 11, which respectively controls the coal supply ad...

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Abstract

Disclosed is an ignition prevention apparatus for a crusher, having supply adjustment means (3a, 3b); a density measurement means (7) for measuring the density of carbon monoxide and/or carbon dioxide at the outlet of a crusher (5); and a storage means (11) for storing, as an analysis value, the ratio between the fixed carbon content fraction and the volatile matter content fraction in solid fuel. In the crusher (5) for crushing the solid fuel, a control means (11) controls the supply adjustment means (3a, 3b) so that the ratio between the fixed carbon content fraction and the volatile matter content fraction in the solid fuel supplied to the crusher (5) is changed on the basis of measurement results of the density measurement means (7) and analysis values. With this structure, ignition can be prevented within the crusher (5).

Description

technical field [0001] The present invention relates to a fire prevention method and fire prevention device for a pulverizer that pulverizes solid fuel used as boiler fuel. Background technique [0002] In the boiler using solid fuel as fuel, the solid fuel pulverized by the pulverizer is supplied together with transport air. [0003] In Japan, since bituminous coal with a high ignition temperature is used as fuel for boilers, little attention has been paid to fires caused by pulverizers. On the contrary, in the early pulverized coal combustion boilers, as a countermeasure against fire, a system for supplying inert gas (steam, etc.) and a rupture disk (rupture disk) were installed in the pulverizer. [0004] On the other hand, in foreign countries, especially in the United States, in the 1980s, due to the use of low-quality coal produced in the west, there were many lessons learned from fires and explosions in the pulverizer. In the future, there will be more opportunities...

Claims

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Application Information

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IPC IPC(8): F23K3/02B02C23/04B02C25/00F23K1/00
CPCF23K3/02F23K1/00F23K2201/10B02C25/00F23K2203/102B02C23/04
Inventor 秋山胜哉朴海洋田洼阳司
Owner KOBE STEEL LTD
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