Refuse incineration method for mixing and incinerating refuse by using coal-fired circulating fluidized bed boiler and its equipment

A circulating fluidized bed and waste incineration technology, applied in the field of waste incineration, can solve the problems of large investment, poor reliability, serious environmental pollution, etc., and achieve the effects of low investment, prevention of equipment corrosion, and simple equipment investment.

Inactive Publication Date: 2004-10-13
梁道广
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Coal slime is burned directly in the furnace, and belt conveyors, scraper conveyors, and screw extruders are still used for its transportation. These methods require large investment, poor reliability, and serious environmental pollution.

Method used

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  • Refuse incineration method for mixing and incinerating refuse by using coal-fired circulating fluidized bed boiler and its equipment

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Embodiment Construction

[0017] The following combination figure 1 The present invention is described in detail:

[0018] The main fuel of the circulating fluidized bed boiler is coal, the particle size is ≤10mm, and CaCo is mixed with less than 0.5mm 3 After that, it is stored in the coal bunker 9, sent to the bottom of the furnace by the coal feeder 10, and burns in a fluidized state at a temperature of 850-900°C. Due to the combustion-supporting effect of the secondary air, the unburned CO, CH 4 and H 2 Further combustion releases heat in the middle and top of the furnace, where the temperature exceeds 850°C. The sorted combustible garbage is crushed by the pulverizer to less than 50mm, and sent to the mixing tank 3 together with coal slime or materials similar to coal slime and pulverized coal smaller than 5mm from the coal pulverizer, and then stirred to a water content of 30-40 after adding water. % of the paste is sent into the large-diameter slow-speed hydraulic plunger pump 4 by the feeder...

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Abstract

The present invention relates to a method for incinerating refuse by using coal burning circulating fluidized bed boiler to make mixed incineration of refuse. Said method includes the following steps: pulverizing combustible refuse, mixing it with coal powder or coal slurry or other combustible paste-like material, adding water and stirring them to obtain the paste-like material whose water content is 30-40%, utilizing plunger pump to convey the paste-like material into the coal-burning circulating fluidized bed boiler and feeding it into the boiler cavity from its top portion to make high-temp. combustion, and its boiler cavity temp. is 850-1100 deg.C.

Description

technical field [0001] The invention relates to a method for incinerating garbage, which includes various domestic and industrial wastes and various crop straws. Background technique [0002] There are various forms of waste incinerators, but the temperature in the furnace is generally low (less than 800°C), and it is easy to produce strong toxic pollutants such as dioxins, which are discharged into the atmosphere with the flue gas to form secondary pollution, and the dust recovery is difficult, and the equipment is easy to Corrosion etc. According to scientific measurements, when the combustion temperature in the furnace is lower than 800°C, dioxins are easily produced, and when the combustion temperature is higher than 800°C, almost no dioxins can be detected in the flue gas, so 800°C is the critical temperature, but At present, it is difficult to make the temperature in the waste incinerator exceed 800°C in an economical way. [0003] Coal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23G5/30
Inventor 梁道广
Owner 梁道广
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