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High-water-containing domestic garbage rapid resource cleaning treatment method and system

A technology for domestic waste and cleaning treatment, applied in combustion methods, incinerators, carbon preparation/purification, etc., can solve the problems of polluted groundwater, homologous pollution, large investment, etc., and achieve a small system footprint and easy installation Flexible, highly integrated effects

Active Publication Date: 2020-03-17
BENGBU COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Harmless methods are mainly pulverization and direct discharge and landfill. Crushing and direct discharge will easily lead to the deposition of most of the insoluble fine particles in the pipeline, high oil content will easily block, anaerobic reaction will occur, biogas and hydrogen sulfide will be generated, and the pipeline safety risk will be increased. , and increase the burden of domestic sewage treatment; landfill occupies a large area, leachate pollutes groundwater, and organic matter decays and deteriorates to form secondary pollution
[0005] Recycling methods are mainly composting and feed. The composting cycle takes a long time, and the amount of garbage absorbed is low. Plastics, fabrics, bones, metals and other sundries in the garbage cannot be decomposed, and the quality of the fertilizer is not good; After directly eating kitchen waste that has not been effectively treated, it is prone to homologous pollution of "cannibalism" and causes cross-infection of diseases between humans and animals, endangering human health, and may promote the spread of certain deadly diseases
[0006] The main method of energy conversion is incineration for power generation, which requires a large investment, and there are toxic substances such as dioxins in the combustion tail gas. In addition, the calorific value of kitchen waste is low, and additional energy is required to ensure the combustion effect

Method used

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  • High-water-containing domestic garbage rapid resource cleaning treatment method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1 ton of kitchen waste with a water content of 60% is crushed until the garbage particles are smaller than 50mm, then sent to the drying equipment, mixed with hot air at 300°C, contacted for heat exchange and dried, and stayed for 30 minutes to heat the garbage to 100°C. The moisture is reduced to 30%, so that the hot air is transformed into hot and humid air at 150°C; the dried garbage is in contact with the high-temperature flue gas at 750°C, and the garbage is heated to 550°C for pyrolysis, staying for 40 minutes, generating residual carbon and pyrolyzing at 250°C High-temperature flue gas is transformed into 320°C medium-temperature flue gas after heating; 250°C pyrolysis gas is subjected to high-temperature dust removal and desulfurization in sequence to obtain residual carbon particles and gas, and then the gas is mixed with hot and humid air for adiabatic and low-nitrogen combustion. After the carbon is mixed and pulverized, 110kg of carbon powder is obtained; the...

Embodiment 2

[0038]Mix 0.5 tons of kitchen waste with a water content of 70% and 0.5 tons of waste paper waste with a water content of 10% and crush them. After being crushed, they are sent to the drying equipment, mixed with hot air at 250°C, and dried by contact with heat exchange. Stay for 30 minutes to raise the temperature of the waste to 90°C, the moisture is reduced to 20%, so that the hot air is transformed into hot and humid air at 150°C; the dried garbage is in contact with the high-temperature flue gas at 750°C, and the garbage is heated to 500°C for pyrolysis, resulting in residual carbon and pyrolysis at 200°C Gas, stay for 30 minutes, the high-temperature flue gas is heated and transformed into 340°C medium-temperature flue gas; 200°C pyrolysis gas is subjected to high-temperature dust removal and desulfurization in sequence to obtain residual carbon particles and gas, and then the gas is mixed with hot and humid air for adiabatic and low-nitrogen Combustion, the residual carb...

Embodiment 3

[0040] Mix 0.3 tons of kitchen waste with a water content of 70% and 0.7 tons of waste paper waste with a water content of 10% and crush them. After being crushed, they are sent to the drying equipment, mixed with hot air at 200°C, and dried by contact with heat exchange. Stay for 25 minutes to heat up the waste to 80°C, the moisture is reduced to 10%, so that the hot air is transformed into hot and humid air at 170°C; the dried garbage is in contact with the high-temperature flue gas at 700°C, and the garbage is heated to 450°C for pyrolysis, resulting in residual carbon and pyrolysis at 180°C Gas, stay for 20 minutes, the high-temperature flue gas is heated and transformed into 350°C medium-temperature flue gas; 180°C pyrolysis gas is subjected to high-temperature dust removal and desulfurization in sequence to obtain residual carbon particles and gas, and then the gas is mixed with hot and humid air for adiabatic and low-nitrogen After burning, the residual carbon is crushed...

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Abstract

The invention discloses a high-water-containing domestic garbage rapid resource cleaning treatment method and system. The method comprises the following steps that (1) breaking is carried out, specifically, a garbage raw material containing 50% - 80% water is broken to particles with the size smaller than 50 mm; (2) drying is carried out, specifically, the broken garbage makes contact with hot air15 - 60 min; (3) pyrolysis is carried out, specifically, dried garbage with the temperature of 80 - 105 DEG C makes contact with high temperature flue gas 15 - 60 min, and the pyrolysis is carried out when the temperature of the garbage is increased to 300 - 600 DEG C; (4) purification is carried out, specifically, and after pyrolysis gas with the temperature of 150 - 300 DEG C is subjected to high-temperature dust removal and desulfurization, residual carbon particles and gas are obtained; (5) low-nitrogen combustion is carried out, specifically, hot and humid air with the temperature of 120- 200 DEG C generated in the step (2) and gas with the temperature of 150 - 300 DEG C are combusted, and the temperature of the obtained high-temperature flue gas is adjusted to 600 - 800 DEG C and fed into the step (3); (6) heat exchange is carried out, specifically, cold air and medium-temperature flue gas with the temperature of 300 - 400 DEG C generated in the step (3) are subjected to indirect heat exchange, and obtained air with the temperature of 200 - 300 DEG C is fed to step (2), and flue gas with the temperature of 120 - 160 DEG C is discharged; and (7) crushing is carried out, specifically, residual carbon and the residual carbon particles obtained in the step (3) are mixed and crushed. The high-water-containing domestic garbage rapid resource cleaning treatment method and system have the characteristics of compact process, high integration degree, small system occupied area, flexible installation mode, in-situ conversion, no odor emission and no secondary pollution..

Description

technical field [0001] The invention belongs to the technical field of kitchen waste treatment, and in particular relates to a rapid resource cleaning treatment method and system for domestic waste with high water content. Background technique [0002] Kitchen waste is one of the important components of domestic waste. In 2017, the volume of domestic waste removal in my country reached 216 million tons, of which 59.3% were kitchen waste. Because the moisture content of kitchen waste is as high as 50% to 80%, and contains a large amount of organic matter, it is susceptible to decay and deterioration due to the action of microorganisms; and the longer the waste is placed, the more serious the deterioration will be. The infiltrated water and foul-smelling gas produced breed mosquitoes and have a bad impact on environmental sanitation. In addition, the leachate generated when kitchen waste is piled up enters the sewage treatment system, which will increase the content of organi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00F23G5/033F23G5/04C01B32/05
CPCB09B3/00F23G5/033F23G5/04C01B32/05
Inventor 李良孙振龙杨丽黄晓晨刘沐鑫付胜楠赵小艳秦英月赵建军李宗群吴中
Owner BENGBU COLLEGE
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