High-nitrogen biomass waste gasification combustion heat supply system and process

A biomass waste combustion heating technology, applied in the petroleum industry, the manufacture of combustible gas, etc., to achieve the effect of weakening interaction, reducing NOx, and efficient utilization

Pending Publication Date: 2018-03-06
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current gasification combustion technology for biomass waste, with regard to high fuel nitrogen to NO x The conversion control of fuel nitrogen does not involve special means or methods. From the perspective of reaction mechanism and pathway, it is necessary to find ways to control the conversion of fuel nitrogen to NO x Transformation technology or means to achieve clean combustion of high-nitrogen biomass waste for heat supply is very necessary

Method used

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  • High-nitrogen biomass waste gasification combustion heat supply system and process

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Effect test

Embodiment 1

[0030] Such as figure 1 As shown, a high-nitrogen biomass waste gasification combustion heating system includes a pyrolysis gasification furnace 1, a torrefaction gas absorption device 3, a high-temperature induced draft fan 4, a volatile matter combustion boiler 5, and a semi-coke combustion heat utilization device 6 ; The pyrolysis gasification furnace 1 is successively divided into a silo 11, a torrefaction area 14, a pyrolysis area 110, a semi-coke gasification combustion area 113, an air chamber 116 and an ash chamber 118 from top to bottom; the torrefaction gas absorption device 3 includes a connected The absorption pool 31 and the tar collection pool 32 that pass through; The volatile combustion boiler 5 includes a burner 51, a tar sprayer 53, a flue gas channel 55, a flue gas outlet 58 and a heat utilization device located in the flue gas channel 55; The coke combustion heat utilization device 6 includes a circulating water jacket 66, a water supply device 61, a soft w...

Embodiment 2

[0043] Same as Example 1, except that the high-nitrogen biomass waste is a mixture of coffee grounds and tea grounds, wherein the mass ratio of coffee grounds and tea grounds is 1:1, and the temperature in the roasting zone 14 is controlled at 250°C to 300°C ℃, the temperature of the pyrolysis zone 110 is controlled at 500°C-550°C, the temperature of the semi-coke gasification combustion zone 113 is controlled at 700°C-800°C, and the temperature at the bottom of the semi-coke gasification combustion zone 113 is controlled at 900°C-950°C.

[0044] The coffee grounds / tea grounds mixture is first subjected to the roasting pretreatment of this embodiment, the unstable fuel N in the coffee grounds / tea grounds mixture can be removed, and the solid phase fuel N can be reduced by 20% to 30%, and then the coffee grounds / tea grounds The separate gasification combustion after the separation of volatile matter and semi-coke effectively weakens the interaction between semi-coke N and tar N,...

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Abstract

The invention provides a high-nitrogen biomass waste gasification combustion heat supply system and a process. The system comprises a pyrolysis gasification furnace, a baking gas absorption device, avolatile component combustion boiler and a semicoke combustion heat utilization device in different zones, wherein the purpose that high-nitrogen biomass waste fuel volatile components and semicoke are firstly separated and are further respectively gasified and combusted independently is achieved, interaction of semicoke N and tar N is effectively weakened, conversion of fuel nitrogen to an NOx precursor is reduced, and meanwhile instable nitrogen structures in fuel are removed in a baking zone through pretreatment, so that the fuel nitrogen is reduced from sources, and NOx generated in laterheat supply process is effectively reduced. On premise that system energy is reasonably utilized, through pretreatment on instable fuel nitrogen and separation gasification combustion heat supply of semicoke nitrogen and volatile component nitrogen, conversion of the fuel nitrogen to NOx is weakened or inhibited in the high-nitrogen biomass waste gasification combustion heat supply process, and clean and efficient utilization of energy of high-nitrogen biomass wastes is achieved.

Description

Technical field: [0001] The invention belongs to the technical field of utilization of biomass resources, and in particular relates to a high-nitrogen biomass waste gasification combustion heating system and technology. Background technique: [0002] In my country's biomass resources, biomass waste accounts for the vast majority, and the annual output is huge. According to statistics, the annual amount of biomass waste from agriculture, forestry and industrial production exceeds 900 million tons, 200 million tons and 400 million tons respectively. tons. Biomass waste is burned as boiler fuel to serve heat and electricity production. It is currently the most typical resource utilization method, which can effectively alleviate the dual pressure of energy shortage and environmental pollution caused by excessive consumption of traditional fossil fuels. [0003] The combustion heating temperature of biomass boilers generally does not exceed 1000 ° C. The traditional combustion met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/60C10J3/66C10J3/72C10J3/80C10J3/84C10J3/86
Inventor 吴创之詹昊庄修政阴秀丽袁洪友
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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