Low-ash-fusion coal fired boiler adopting horizontal extended furnace

A pre-furnace, ash melting point technology, applied in the combustion of lump fuel and liquid fuel, combustion of lump fuel and gaseous fuel, combustion of lump fuel and powder fuel, etc., can solve furnace slagging and other problems to achieve the effect of solving slagging, convenient operation and ensuring normal operation

Inactive Publication Date: 2015-04-22
SHANXI LANTIAN ENVIRONMENTAL PROTECTION EQUIPCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the problem of slagging in the furnace when the existing pulverized coal boiler burns coal powder with low ash melting point, and provides a boiler with a horizontal front furnace for burning coal with low ash melting point

Method used

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  • Low-ash-fusion coal fired boiler adopting horizontal extended furnace
  • Low-ash-fusion coal fired boiler adopting horizontal extended furnace
  • Low-ash-fusion coal fired boiler adopting horizontal extended furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Such as figure 1 A boiler with low ash melting point coal is shown, which adopts a horizontal front furnace, including a horizontal front furnace 1 fixed at the front of the furnace body, and the furnace wall 5 of the front furnace is surrounded by a water-cooled wall. Wherein the inner surface of the water-cooled wall is laid with a refractory paint layer; the furnace outlet 8 of the horizontal front furnace 1 communicates with the cooling chamber 10, wherein the front end of the furnace outlet 8 is provided with an inclined furnace bottom 6, and the junction with the cooling chamber 10 is provided There is a slag tube bundle 9, and a slag pool 7 is arranged at the lower part; a burner 2, an overburning air nozzle 3, and a flame angle 4 are arranged on the front furnace, and the overburning air nozzle 3 is arranged at a distance from the primary tuyere 4 of the lowest layer At a distance of ~5 meters, the folding flame angle 4 is arranged at the front part of the incl...

Embodiment 2

[0025] Such as figure 2 Shown is a boiler using low-ash melting point coal with a horizontal front furnace. The front furnace 1 is arranged with four sets of burners 2 tangentially injected into the furnace, and other structures are the same as in Embodiment 1. This structure is suitable for the situation where the boiler capacity is large and the cross-section of the front furnace is large.

Embodiment 3

[0027] Such as image 3 A boiler with low ash melting point coal is shown, which adopts a horizontal front furnace, including a horizontal front furnace 1 fixed at the front of the furnace body, and the furnace wall 5 of the front furnace is surrounded by a water-cooled wall. Wherein the inner surface of the water-cooled wall is laid with a refractory paint layer; the furnace outlet 8 of the horizontal front furnace 1 communicates with the cooling chamber 10, wherein the front end of the furnace outlet 8 is provided with an inclined furnace bottom 6, and the junction with the cooling chamber 10 is provided There is a slag tube bundle 9, and a slag pool 7 is arranged at the lower part; a burner 2, an overburning air nozzle 3, and a flame angle 4 are arranged on the front furnace, and the overburning air nozzle 3 is arranged at a distance from the primary tuyere 4 of the lowest layer At a distance of ~5 meters, the folding flame angle 4 is arranged at the front part of the incli...

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Abstract

The invention discloses a low-ash-fusion coal fired boiler adopting a horizontal extended furnace and belongs to the technical field of industrial pulverized-coal fired boilers. The boiler is used for solving the problem of the existing pulverized-coal fired boilers that furnace hearths are subjected to slag-bonding during the combustion of low-ash-fusion coal. The low-ash-fusion coal fired boiler adopting the horizontal extended furnace comprises the horizontal extended furnace which is fixed at the front part of a furnace body, wherein the horizontal extended furnace is formed by water-cooled walls through enclosing, and fireproof coating layers are laid on the internal surfaces of the water-cooled walls; a furnace hearth outlet of the horizontal extended furnace is communicated with a cooling chamber, a sloping furnace bottom is arranged at the front end of the furnace hearth outlet, a slag coagulating pipe bundle is arranged at the junction of the furnace hearth outlet and the cooling chamber, and a slag basin is arranged at the lower part of the furnace hearth outlet; combustors, an after-combustion air nozzle and furnace arches are arranged on the horizontal extended furnace, the after-combustion air nozzle is arranged at a position which is away from primary air ports of the lowest layer by 4-5 meters, and the furnace arches are arranged at the front part of the sloping furnace bottom. According to the boiler, the structure is simple, the operation is convenient, the problem of slag-bonding of low-ash-fusion pulverized-coal fired boilers can be effectively solved, and the normal operation of the boiler is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of industrial pulverized coal boilers, and relates to an industrial pulverized coal boiler burning coal with low ash melting point, in particular to a boiler using low ash melting point coal with a horizontal front furnace. Background technique [0002] Coal-fired industrial boilers, as thermal equipment widely used in various fields of society in our country, have made some progress in equipment technology and operation management in recent years, but the overall situation of inefficiency and extensiveness has not changed. The main reasons for the analysis are fuel quality, There are many reasons for combustion and equipment level, pollution control and monitoring, operation management, etc., but the core is the problem of combustion and equipment technology progress. [0003] Pulverized coal combustion technology has the advantages of high burnout rate and small heat loss of flue gas, and is currently the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23C3/00F23C5/08F23C7/02
Inventor 王欢王民发郎凤娥郎鹏德郎秀荣
Owner SHANXI LANTIAN ENVIRONMENTAL PROTECTION EQUIPCO
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