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Method and system for jointly and circularly generating electricity by gasifying municipal garbage at high temperature

A gasification combined cycle, municipal waste technology, applied in the field of energy-saving and environmental protection treatment of municipal waste, can solve the problems of high waste resource utilization and secondary pollution, and achieve the effect of high resource utilization and efficient recovery

Active Publication Date: 2012-02-22
BEIJING AEROSPACE PROPULSION INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The object of the present invention is to provide a method and system for generating electricity by using high-temperature gasification combined cycle of urban waste, which has high resource utilization of waste, can efficiently recycle resources and energy in domestic waste, and can recycle valuable waste in ash. Metal, molten slag; it can fundamentally solve the problem of secondary pollution of dioxins and heavy metals, and realize the reduction of highly toxic secondary pollutants such as dioxins, furans (PCDD / Fs), and heavy metals to near zero discharge, which can meet the Stricter pollution emission standards for domestic waste incineration

Method used

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  • Method and system for jointly and circularly generating electricity by gasifying municipal garbage at high temperature
  • Method and system for jointly and circularly generating electricity by gasifying municipal garbage at high temperature

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Embodiment 1

[0033] A kind of method of utilizing urban refuse high-temperature gasification combined cycle power generation described in the present invention, it comprises the following steps:

[0034] (a) Dry and crush a large amount of stored garbage; when drying, superheated steam is used as the drying medium, and the drying temperature is about 200°C to evaporate the water in the garbage; when crushing, the crushing fineness of the garbage should be below 1mm;

[0035] (b) Then burn the garbage obtained in step (a) under pure oxygen environment, the combustion temperature is at 1000~1250°C (such as at 1000°C, 1100°C or 1250°C), and the pressure in the combustion chamber is at a slight positive pressure~4MPa (such as micro Positive pressure, 1MPa or 4MPa), the organic components in the garbage are gasified into synthesis gas, and the inorganic components are melted into slag;

[0036] Rapidly cool the synthesis gas and slag obtained from combustion to a temperature below 120°C, then d...

Embodiment 2

[0040] like figure 1 Shown, a kind of method of utilizing municipal refuse high-temperature gasification combined cycle power generation described in the present invention, it comprises following specific steps:

[0041] (a) Garbage is stored in the garbage storage bin 2, and then the garbage is transported to the drying device 5, and the superheated steam is transported to the drying device 5 through the superheated steam inlet pipeline 3, and the garbage is dried and then output through the saturated steam output pipeline 4; drying The final rubbish is transported to the crushing device 6 and crushed to a fineness below 1mm;

[0042] (b) The air is separated from the oxygen by the air separation unit 8, and the oxygen is transported to the upper gasification section 10 of the incinerator gasification furnace through the oxygen delivery pipeline 9; The gasification section 10 is combusted with oxygen; the combustion temperature is 1000-1250°C (for example, at 1000°C, 1100°C ...

Embodiment 3

[0050] like figure 1 As shown in the present invention, a system for generating electricity using high-temperature gasification combined cycle of urban waste, which includes sequentially connected waste storage and conveying unit, drying unit, crushing unit, air separation unit, gasification unit, washing unit, Flue gas purification unit and gas-steam combined cycle power generation unit;

[0051] The garbage storage and delivery unit includes a garbage delivery pipeline 1, and the entrance of the garbage storage bin 2 is connected to the garbage delivery pipeline 1; garbage enters the garbage storage bin 2 through the garbage delivery pipeline 1;

[0052] The drying unit includes a drying device 5, the inlet of the drying device 5 is connected to the outlet of the garbage storage bin 2 through a pipeline, and the superheated steam intake pipeline 3 and the saturated steam output pipeline 4 are connected to the inlet and the outlet of the drying device 5 respectively. Connect...

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Abstract

The invention relates to a method and a system for jointly and circularly generating electricity by gasifying municipal garbage at a high temperature. The method comprises the following steps of taking high-temperature gasification of a combustion furnace as a main technological approach, gasifying organic components in household garbage when a combustion temperature under a pure oxygen combustion environment reaches 1000 DEG C to 1250 DEG C, and melting inorganic components. The technical schemes of the method and the system provided by the invention have high resource utilization of the garbage, can efficiently recover the resource and energy source in the household garbage, recover valuable metals and liquid slag in ash slag, fundamentally solve the secondary pollution problem of dioxin and heavy metal, reduces the emission value of highly toxic secondary pollutants such as dioxin, furans (PCDD / Fs), heavy metals and the like close to zero emission, and meet the more strict pollutants emission standard of combustion of household garbage.

Description

technical field [0001] The invention relates to an energy-saving and environment-friendly treatment technology for urban waste, in particular to a method and system for generating electricity by utilizing high-temperature gasification combined cycle of urban waste. Background technique [0002] After more than 100 years of development of domestic waste incineration technology, especially since the 1970s, affected by the global resource and energy crisis and the implementation and continuous strengthening of various environmental protection regulations, waste incineration technology has developed rapidly. The simple incineration treatment has experienced the traditional waste incineration technology represented by fixed bed type, mechanical grate type, rotary kiln type and fluidized bed type waste incineration technology. The traditional waste incineration process is prone to secondary pollution, such as volatile organic compounds (VOCs), especially aromatic hydrocarbons (PAH...

Claims

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Application Information

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IPC IPC(8): F23G5/00F23G5/033F23G5/04F22B1/18F02C6/18F01K11/02B01D47/00B01D53/78B01D53/50B01D53/68B01D53/047C01B13/02
CPCY02E20/12Y02E50/10Y02P20/10Y02P20/129Y02P70/10
Inventor 钱永康丁建亮杨娟
Owner BEIJING AEROSPACE PROPULSION INST
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