Treatment process and system for coupling, drying and pyrolyzing household garbage

A technology of domestic waste and treatment process, which is applied in the field of domestic waste coupled drying pyrolysis treatment process and treatment system to achieve the effects of improving domestic waste pyrolysis efficiency, low operating cost and strong process controllability

Inactive Publication Date: 2019-01-11
GUANGXI BOSSCO ENVIRONMENTAL PROTECTION TECH
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is a domestic waste coupling drying pyrolysis treatment process and treatment system. By introducing a biological hot air coupling drying process, the pyrolysis system and the tail gas treatment process are optimized to realize efficient drying of domestic waste and exhaust gas treatment. The effective control of oxygen content in the medium can effectively improve the efficiency of waste pyrolysis treatment and control the discharge of secondary pollution and exhaust gas, thereby reducing equipment investment and operation and maintenance costs, and realizing the harmless and reduction treatment of domestic waste

Method used

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  • Treatment process and system for coupling, drying and pyrolyzing household garbage
  • Treatment process and system for coupling, drying and pyrolyzing household garbage
  • Treatment process and system for coupling, drying and pyrolyzing household garbage

Examples

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Effect test

example 1

[0053] The domestic waste is crushed to a particle size of 20mm by a shearing double-shaft crusher. The magnetic separator selects metal materials for recycling. The crushed waste is sent to the waste feeding pool; the crushed domestic waste is dried by biological hot air coupling, and the The drying time is 5 days, the biological drying temperature is 75°C, the hot air drying time is 0.5 days, the drying temperature is 110°C, the moisture content of domestic waste after coupling drying is less than 20%; the oxygen content of the air entering the coupling drying is 21 %, 3% of the oxygen is consumed through coupling drying, which is used for biological drying reaction, and the oxygen content of coupling drying tail gas is 18% as the primary air for domestic waste pyrolysis; after drying, the waste is evenly sent to the domestic waste pyrolysis gasifier for further processing Pyrolysis and gasification, the gasification temperature is 600°C, pyrolysis produces combustible gas an...

example 2

[0055] The domestic waste is crushed to a particle size of 35mm by a shearing double-shaft crusher, and the metal materials are selected by the magnetic separator for recycling. The crushed waste is sent to the waste feeding pool; The drying time is 6 days, the biological drying temperature is 68°C, the hot air drying time is 0.75 days, the drying temperature is 100°C, the moisture content of domestic waste after coupling drying is less than 20%; the oxygen content in the coupled drying air is 21 %, 4.5% of the oxygen is consumed by coupling drying, which is used for biological drying reaction, and the oxygen content of coupling drying tail gas is 16.5% as the primary air for domestic waste pyrolysis; after drying, the waste is evenly sent to the domestic waste pyrolysis gasifier for further processing Pyrolysis and gasification, the gasification temperature is 700°C, pyrolysis produces combustible gas and ash; the combustible gas generated by pyrolysis enters the secondary com...

example 3

[0057] The domestic waste is crushed to a particle size of 50mm by a shearing double-shaft crusher, and the metal materials are selected by the magnetic separator for recycling. The crushed waste is sent to the waste feeding pool; The drying time is 7 days, the drying temperature is 61°C, the hot air drying time is 1 day, the drying temperature is 90°C, the moisture content of domestic waste after coupling drying is less than 20%; the oxygen content of the air entering the coupling drying is 21% After coupled drying, 6% of the oxygen is consumed, which is used for biological drying reaction, and the oxygen content of coupling drying tail gas is 15% as the primary air for domestic waste pyrolysis; after drying, the waste is evenly sent to the domestic waste pyrolysis gasifier for thermal Decomposition and gasification, the gasification temperature is 800°C, pyrolysis produces combustible gas and ash; the combustible gas generated by pyrolysis enters the secondary combustion cham...

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Abstract

The invention discloses a treatment process and system for coupling, drying and pyrolyzing household garbage. The treatment process includes the steps that (1) the household garbage is subjected to crushing and magnetic separation pretreatment; (2) the household garbage is subjected to biothermal air coupling and drying treatment; (3) the household garbage is subjected to pyrolysis gasification through a pyrolysis gasification furnace; (4) pyrolysis produces combustible gas into a secondary combustion chamber for secondary combustion; (5) secondary combustion produces high temperature flue gasto pass through a quenching heat exchanger; (6) after the heat exchange, the flue gas is exchanged with the air through an air preheater; and (7) the flue gas is finally discharged through an exhaustgas treatment system. The treatment system includes a crushing magnetic separation device, a biothermal air coupling and drying treatment device, the pyrolysis gasification furnace, the secondary combustion chamber, the quenching heat exchanger, the air preheater, the exhaust gas treatment system, and a chimney. The system has the advantages of high pyrolysis treatment efficiency of the householdgarbage, high stability of garbage pyrolysis and gasification, high controllability of the process, and low difficulty in treatment of exhaust gas, and can be widely applied to the technical field ofhousehold garbage pyrolysis treatment.

Description

technical field [0001] The invention belongs to the technical field of domestic waste treatment, in particular to a domestic waste coupled drying pyrolysis treatment process and treatment system. Background technique [0002] With the continuous improvement of people's living standards, the content of organic matter in domestic garbage is increasing, and the moisture content of garbage is relatively high. Due to the complex composition of domestic waste, it is difficult to deal with it. If it is not handled properly, it may cause serious secondary pollution. In recent years, with the strengthening of environmental protection awareness and the successive promulgation of increasingly stringent national environmental protection laws and policies, the "harmless, reduction and recycling" of domestic waste disposal has become the basic principle followed by all countries. Waste pyrolysis technology As one of the effective ways to realize this principle, it has gradually been reco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23G5/02F23G5/027F23G5/033F23G5/04F23G5/16F23G5/46
CPCF23G5/006F23G5/02F23G5/027F23G5/033F23G5/04F23G5/16F23G5/46F23G2201/80F23G2201/40F23G2201/303F23G2201/302F23G2201/10F23G2206/10Y02E20/12
Inventor 陈国宁宋海农陆立海林宏飞杨崎峰潘振谭恒周郁文罗剑云龙俊霖许景云
Owner GUANGXI BOSSCO ENVIRONMENTAL PROTECTION TECH
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