Water-cooled grate combustor

Abstract

A water-cooled grate combustor comprises a fixed water-cooled grate, a feed hopper, a feed mechanism, a fixed wind chamber, a combustion chamber and an ash pit, the feed hopper is arranged on the front upper part of the combustion chamber, the feed mechanism is arranged in front of the hopper, the fixed wind chamber is arranged under the grate, the combustion chamber is arranged upon the grate, and the ash pit is arranged at the front lower end of the grate. The technical points are as follows: the fixed water-cooled grate is downwardly inclined by 1 to 30 degrees along the moving direction of fuel, the arrangement direction of the tubes of the fixed water-cooled grate accords with the moving direction of the fuel, headers with water inlets and water outlets are perpendicularly connected with the upper and the lower ends of the tubes of the fixed water-cooled grate, leakage-proof spacing baffles which are lapped at the front and the rear or the left and the right are evenly fixed between each two neighboring tubes of the fixed water-cooled grate, and an intake passage is reserved between each two neighboring spacing baffles. Because the grate of the fixed and inclined water-cooled grate combustor provided by the invention is cooled by water, the grate cannot be burnt out by high temperature, the maintenance rate is low, and coal and biomass can be burnt.

Description

technical field [0001] The invention belongs to the technical field of combustion devices for fuel boilers, in particular to a water-cooled grate burner for a continuous clean combustion device for fuel. Background technique [0002] Existing coal burners mainly include powder injection burners, chain grate burners, reciprocating grate burners, etc. The main problems are high maintenance rate, poor adaptability of coal types and inability to burn biomass. Existing coal-fired boilers usually consist of a furnace, a fire grate, and an air chamber. When this kind of boiler is shut down, a layer of coal is usually added to the furnace for suffocation, and then the air is supplied when the furnace is started. Therefore, when this kind of boiler is shut down, a large amount of coal will still be consumed. Moreover, this kind of boiler is to add coal to the top of the furnace charcoal fire layer, so that the coal starts to burn from the bottom. Therefore, black smoke is easy to b...

AI Technical Summary

Problems solved by technology

The main problems are high maintenance rate, poor adaptability of coal types and inability to burn biomass, etc.

When this kind of boiler is shut down, a layer of coal is usually added to the furnace for suffocation, and then the air is supplied when the furnace is started, so this kind of boiler still consumes a large amount of coal when it is shut down.

Moreover, this kind of boiler adds coal to the top of the furnace charcoal fire layer, so that the coal starts to burn from the bottom. Therefore, it is easy to generate black smoke, incomplete combustion, and low thermal efficiency during combustion. The cost of fuel is high, the burden on the user is heavy, and the boiler grate cannot be water-cooled, the grate temperature is too high and easy to damage, the operation reliability is poor, and the furnace needs to be shut down frequently for maintenance, which brings inconvenience to the energy saving, environmental protection and normal use of the coal-fired boiler

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