Reciprocating type heat radiation air-preheating energy-saving fire grate

Abstract

The invention provides a reciprocating type heat radiation air-preheating energy-saving fire grate. The fire grate agitates the fuel by using mechanical movement of the fire grate to drop out clinkers on the fuel surface so as to increase the contact factor between air and fixed carbon; and simultaneously, air is preheated by convection heat transfer by using the heat radiated to a wavelike grate board of the fire grate from the bottom of the high-temperature fuel. Under the dual action of mechanical agitation and air preheating, the combustion efficiency and the combustion temperature are obviously increased, the temperature of the fire grate is lowered, the problems of easy burning loss and serious coal drop of the mechanical fire grate are solved, the energy efficiency of the boiler is increased by 15-20%, the boiler output is increased by 25-35%, the life of the fire grate is prolonged by 3-4 times, and the operation is stable and reliable.

Description

Technical field [0001] The invention relates to a fire grate, in particular, the mechanical movement of the fire grate can be used to stir the fuel to make the ash on the surface of the fuel fall off, and at the same time, the heat radiation from the bottom surface of the fuel can be used to preheat the air to improve the combustion efficiency and temperature. A fire grate that achieves the purpose of energy saving. Background technique [0002] The traditional air preheater uses the waste heat of the flue gas to preheat the air through a heat exchanger, and then transports it into the furnace to participate in combustion. This type of air preheater has a complex structure, takes up a lot of space, is easy to deposit carbon, is easy to corrode, and has high operation and maintenance costs. And when the preheated air enters the furnace through the grate, the temperature of the grate will rise, which will deteriorate the working environment of the grate and accelerate the oxi...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the traditional air preheater's complex structure, large space occupation, easy carbon deposition, easy corrosion, high operation and maintenance costs, and at the same time, in order to overcome the low combustion temperature of the fixed grate, and the mechanical grate is easy to burn out and has a short life , large heat radiation loss, serious coal fall, and the water-cooled mechanical grate occupies a large space, complex structure, many faults, serious coal fall, and limited combustion temperature rise. The invention provides a mechanical grate that can be used Stir to make the ash on the surface of the fuel fall off, increase the contact coefficient between the air and the fixed carbon, and convert the heat radiated from the bottom surface of the fuel to the grate into the physical heat of air heating, preheat the air, and return it to the furnace to participate in the combustion, thereby more effectively Improve the combustion efficiency and combustion temperature, reduce the temperature of the grate, increase the life of the grate, reduce the radiation heat loss on the bottom surface of the fuel and reduce the loss of falling coal. The reciprocating heat radiation air preheats the energy-saving grate

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