Household garbage coupling fluidized bed grading pyrolysis gasification technology

A domestic waste, pyrolysis gasification technology, applied in the field of domestic waste coupled fluidized bed staged pyrolysis gasification technology, can solve the problems of complex oil components, difficulty in removing tar, difficult phenolic water, etc.

Active Publication Date: 2013-02-20
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its advantages are rapid capacity reduction and complete high-temperature harmlessness. It occupies a small area and has heat recovery. However, due to the presence of oxygen, chlorine-containing organic substances in garbage will inevitably produce highly toxic dioxins that are difficult to decompose. , becoming a bottleneck restricting the application of waste incineration
[0004] Domestic waste pyrolysis is a newly developed technology in recent years. It has a high utilization rate of waste resources and no gene

Method used

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  • Household garbage coupling fluidized bed grading pyrolysis gasification technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Example 1, the domestic waste is first deironed and pulverized by the deironing pulverizer (10), and then the 0-6mm garbage particles are dried by the sleeve type drum dryer (11), and the generated water vapor containing peculiar smell is hot As a part of the gasification agent, hot garbage particles and a small amount of heat carrier are sent to the middle and lower part of the entrained bed reactor (13) coupled with the fluidized bed (1), mixed with gasification gas and circulating ash, and lifted upwards for hydrogen pyrolysis. Two-stage gas-solid separation, the high-temperature crude semi-coke separated by the first-stage gas-solid separator (5) returns to the turbulent fluidized bed (12) at the bottom of the coupled fluidized bed (1) through the feeder (6), and is mixed with air and Water vapor reacts at 800-1100°C to generate gasification gas, which flows upward together with circulating ash to form material circulation; the high-temperature fine semi-coke separat...

Embodiment 2

[0015] Example 2, the domestic garbage is first deironed and pulverized by the deironing pulverizer (10), and then the 0-6mm garbage particles are dried by the sleeve type drum dryer (11), and the generated water vapor containing peculiar smell is hot As a part of the gasification agent, hot garbage particles and a small amount of heat carrier are sent to the middle and lower part of the entrained bed reactor (13) coupled with the fluidized bed (1), mixed with gasification gas and circulating ash, and lifted upwards for hydrogen pyrolysis. Two-stage gas-solid separation, the high-temperature crude semi-coke separated by the first-stage gas-solid separator (5) returns to the turbulent fluidized bed (12) at the bottom of the coupled fluidized bed (1) through the return device (6), and is mixed with oxygen and Water vapor reacts at 800-1100°C to generate gasification gas, which flows upward together with circulating ash to form material circulation; the high-temperature fine semi-...

Embodiment 3

[0016] Embodiment 3, the air in embodiment 1 is changed into oxygen-enriched air, other is identical.

[0017] The domestic waste coupling fluidized bed staged pyrolysis gasification process provided by the present invention not only rationally utilizes heat energy, eliminates tar in the gasification process, solves the problem of fly ash in fluidized bed gasification, and eliminates dioxin and Odor, high methane gas content, while the gas does not contain tar, does not produce phenol water; low oxygen consumption, high gasification efficiency, high gasification intensity, small equipment volume, low steel consumption, greatly reduced fixed investment, and exhaust emissions Ash process is simple.

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Abstract

The invention provides a household garbage coupling fluidized bed grading pyrolysis gasification technology. Household garbage is firstly subjected to deferrization and crushing, then 0-6mmgarbage particles are dried through a casing pipe type rotary drum drying machine, garbage particles and a small quantity of heat carriers are sent to the middle lower portion of an entrained flow reactor to be mixed with gasified gas and circulating ash and lifted up to be performed with hydroforming pyrolysis, after gas-solid separation, first-stage separated high-temperature coarse semi-coke return to the bottom of a coupling fluidized bed to react between 800-1000 DEGC to generate gasified gas, and the gasified gas and the circulating ash together to flow upwards to form material circulation. Second-stage separated high-temperature fine semi-coke is sent to an entrained-flow bed to react between 1200-1600 DEG C to generate high-temperature gas, and the high-temperature gas and liquid ash slag simultaneously flow out of the entrained-flow bed in spiral inclined-downwards mode, and the high-temperature gas go upwards and enter the coupling fluidized bed. The liquid ash slag flows downwards to a circulating ash material layer of a circulating fluidized bed and is subjected to heat exchange to be solidified into solid ash slag. Combustion gas separated from the second stage servers as product gas to be supplied externally.

Description

1. Technical field [0001] The invention provides a staged pyrolysis gasification process coupled with a fluidized bed of domestic garbage, which belongs to the field of environmental protection. 2. Background technology [0002] At present, the treatment methods of urban waste in various countries in the world mainly include classified recycling, landfill, composting and incineration, cracking and gasification. Landfilling requires a large amount of land. At the same time, harmful components in garbage will also cause serious pollution to the atmosphere, soil, and water sources, which not only damages the ecological environment, but also seriously endangers human health; composting requires sorting and classification of garbage, requiring high organic content of garbage. Moreover, composting cannot be reduced, and a large amount of land is still needed. [0003] The essence of incineration is to oxidize organic waste into inert gaseous substances and inorganic non-combusti...

Claims

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Application Information

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IPC IPC(8): C10J3/54C10J3/66C10J3/84
Inventor 田原宇乔英云
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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