Shaft-rotating coal stirring boiler

Abstract

The invention provides a pivot coal spreading boiler, belonging to an industrial boiler. The boiler combines the advantages of a grate furnace, a double-layered grate furnace, a coal tossing furnace and a chain furnace such as mechanical coal transportation, uniform fire coal spreading, multizone and multimode burning, sufficient burning, inferior coal adaptability, high heating efficiency, fast load adjustment and the like; and overcomes the defects of the furnaces. The invention has the characteristics of high efficiency, energy saving, environmental protection, and the like, and is very practical. The structure of the boiler comprises a pivot coal spreading horizontal boiler and a pivot coal spreading fluidized bed furnace and is composed by the combination of pivot coal spreading grates and general grates or a fluidized bed; and the pivot coal spreading grate comprises a fin arris, a pivot tube and vents. The best characteristic of the pivot coal spreading boiler is that the pivot coal spreading grate has functions of fire coal transporting, grinding and spreading; the boiler is provided with an upper grate layer and a lower grate layer with multiple burning modes such as grate firing, float firing, boiling and the like, the heating efficiency is high and the application range of the coal variety is wide; the rotating speed of the grate is adjustable, thus changing the coal supply quantity and adapting to the load change; furthermore, the rotation and production are simple, assembly is simple and fast and replacement is convenient and fast.

Description

technical field [0001] industrial boiler Background technique [0002] 1. Boiler combustion method [0003] (1), layered combustion [0004] The combustion is carried out by distributing the fuel on the grate with a certain thickness. As long as the air and coal seam are well mixed and have a certain combustion temperature, ideal combustion can be achieved. If the mixing is not good or the air is insufficient, the combustion will be incomplete and the combustion efficiency will be improved. Low, black smoke. [0005] (2) Suspension combustion [0006] The fuel is injected into the furnace in the form of powder, mist or gas along with the air for combustion. Suspension combustion has rapid ignition, complete combustion reaction, high thermal efficiency, strong ability to adapt to external load changes, and strong adaptability to fuel. However, solid fuel must be crushed and ground in advance. [0007] (3), boiling combustion [0008] Combustion of fuel in a fluidized b...

AI Technical Summary

Problems solved by technology

[0019] 2) Disadvantages: the labor intensity of operation is high, the combustion is periodically uncoordinated, black smoke is emitted, and the thermal efficiency of the boiler is reduced

[0030] ②, the fire conditions are poor, and the range of coal types is narrow

Boilers equipped with coal throwers generally have no front and rear arches, poor air flow mixing, and short flue gas flow. If the combustion is not adjusted properly, it is easy to bring more carbon particles and fly ash from the furnace, which will damage the convection heating surface and pollute the air. It also reduces the thermal efficiency of the boiler and wastes fuel

[0040] 3. Advantages and disadvantages of coal throwing furnace

When the moisture in the coal is too high, it is easy to form lumps and block; when the moisture is too low, it is easy to self-flow and cannot operate normally

[0046] ② High quality requirements for coal throwing machine manufacturing

[0059] 2. Advantages and disadvantages of fluidized bed

[0065] ① Power consumption is high due to the need for power for raw coal crushing, screening, transportation, dust removal and the use of high-pressure fans

[0066] ②. The buried pipe wears seriously. If anti-wear measures are not taken, pipe burst accidents are prone to occur

[0067] ③, the amount of fly ash is large, and the heat loss is large

[0068] ④, dust pollution is serious, high requirements for dust removal equipment

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