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Solid fuel supply device and method, pulverizer and boiler

A technology of solid fuel and supply device, applied in the field of boilers, can solve the problems of stable operation obstacles of boilers, biomass fuel supply, etc., and achieve the effect of ensuring supply

Active Publication Date: 2022-05-13
MITSUBISHI HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the operation of the rotary valve is completely stopped, the biomass fuel cannot be supplied to the pulverizer, and the pulverizer cannot generate fine powder fuel and continuously transmit it to the combustion head, which may hinder the stable operation of the boiler

Method used

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  • Solid fuel supply device and method, pulverizer and boiler
  • Solid fuel supply device and method, pulverizer and boiler
  • Solid fuel supply device and method, pulverizer and boiler

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0102] figure 1 It is a schematic configuration diagram showing the boiler of the first embodiment.

[0103] The boiler of the first embodiment is, for example, a fine-powder fuel boiler that uses pulverized biomass (carbon-containing solid fuel), burns the fine-powder fuel with a combustion head, and recovers heat generated by the combustion. , It can generate superheated steam by exchanging heat with water and steam. In the following description, upper or upper or upper means the upper side in the vertical direction, and lower or lower or lower means the lower side in the vertical direction.

[0104] In the first embodiment, if figure 1 As shown, the boiler 10 has a furnace 11 , a combustion device 12 and a flue 13 . The furnace 11 has a hollow shape of a square tube and is installed in the vertical direction. The furnace wall (heat transfer tube) constituting the furnace 11 is composed of a plurality of evaporating tubes and fins connecting them, and suppresses temperat...

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PUM

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Abstract

The present invention relates to a solid fuel supply device and method, a pulverizer, and a boiler. In the solid fuel supply device, method, and boiler, the operation stoppage of a rotary valve is suppressed to ensure stable supply of solid fuel. Equipped with: a solid fuel supply pipe (63), which supplies solid fuel; a rotary valve (64), which is arranged on the solid fuel supply pipe (63) and has a rotatable impeller (82); a detector (115), which detects the rotary valve (64 ) at the biting into; and the control device (65), when the detector (115) detects the biting, the control means makes the impeller (82) rotate in the reverse direction for a preset specified time (Tb) to the forward direction. direction rotation.

Description

technical field [0001] The present invention relates to a solid fuel supply device and method, a pulverizer provided with the solid fuel supply device, and a boiler provided with the pulverizer. Background technique [0002] The boiler has a hollow furnace that is vertically arranged, and a plurality of combustion devices (combustion heads) are arranged on the furnace wall along the circumferential direction. A flue is connected to the boiler vertically above the furnace, and a heat exchanger for generating steam is arranged in the flue. In addition, a mixture of fuel and air is injected into the furnace through the combustion head to form a flame, and high-temperature combustion gas is generated and flows to the flue. The combustion gas flowing into the flue heats water or steam flowing through the plurality of heat transfer tubes constituting the heat exchanger to generate superheated steam. [0003] In the boiler, the solid fuel pulverized into fine powder by the solid ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23K3/02F23K1/00F23C5/08
CPCF23K3/02F23K1/00F23C5/08F23K2201/1006F23K2201/103F23K2203/008F23K2203/201F23K3/00B65G65/4881F23K2201/10F23K2203/002F23K2203/10
Inventor 山口聪太朗泽升吾
Owner MITSUBISHI HEAVY IND LTD