Fixed grate incinerator

Abstract

The invention belongs to the field of waste disposal equipment and discloses a fixed grate incinerator. The fixed grate incinerator comprises an incinerator body made of a refractory material and a water-cooled grate, wherein the water-cooled grate transversely passes through the middle lower part of the incinerator body, and a water outlet of the water-cooled grate is higher than a water inlet; and an angle formed between a plane of the grate and a horizontal plane is 3-5 degrees. High-pressure air supply pipes are uniformly and densely distributed on the wall of the incinerator body and the bottom of the incinerator, high-pressure air is introduced into the high-pressure air supply pipes, and the flow velocity of the high-pressure air is 30-100 m / s. The fixed grate incinerator has the beneficial effects that the existing water-cooled jacket type grate furnace and the existing refractory material type grate furnace are recombined in structure, the advantages of high hearth temperature and complete waste incineration of the incinerator body made of the refractory material are combined with the advantage of long service life of the water-cooled grate, the defects of lower grate temperature and incomplete waste incineration of a traditional water-cooled jacket type furnace are overcome, and the defects of easiness in high-temperature oxidization and burnout and short service life of a cast iron fire-proof grate are also overcome.

Description

technical field [0001] The invention belongs to the field of garbage treatment equipment and relates to a fixed grate incinerator. Background technique [0002] Fixed grate incinerators are generally used to incinerate solid waste such as medical waste, aviation waste, domestic waste, animal carcasses, wood chips, and waste paper, and generally have the following two structures: one is a water-cooled jacket structure, and the other is a refractory material structure. . The water-cooled jacket structure adopts water-cooled grate. Although the service life of the grate can be guaranteed, due to the characteristics of solid waste, the furnace temperature of the grate furnace using water-cooled jacket type is generally only 500-600 ° C, and the incineration of solid waste is not complete. Although the use of refractory materials can ensure the temperature of the flue gas entering the secondary combustion chamber and reduce the fuel consumption of the secondary combustion chambe...

AI Technical Summary

Problems solved by technology

The water-cooled jacket structure adopts water-cooled grate. Although the service life of the grate can be guaranteed, due to the characteristics of solid waste, the furnace temperature of the grate furnace using water-cooled jacket type is generally only 500-600 °C, and the incineration of solid waste is not complete.

Although the use of refractory materials can ensure the temperature of the flue gas entering the secondary combustion chamber and reduce the fuel consumption of the secondary combustion chamber, and the furnace temperature can reach above 800 ° C, the solid waste incineration is relatively thorough, but due to the high incineration temperature, the process of waste incineration A large amount of corrosive substances are released, and the cast iron grate is used, which is easy to oxidize or burn out at high temperature

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