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Internal circulating fluidized bed gasification furnace adapted to organic solid waste treatment

A fluidized bed gasifier and solid waste technology, applied in incinerators, combustion air/fuel supply, combustion methods, etc., can solve the problems of geographical restrictions, low calorific value of sludge, and inability to realize on-site disposal, etc. achieve the effect of avoiding delamination

Pending Publication Date: 2020-12-22
HUBEI JIADE TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the low calorific value of sludge, dry incineration needs to add a large amount of fuel to support combustion, and a large amount of flue gas pollutants are produced after combustion, so the investment for independent incineration of sludge is large
Drying and co-combustion mainly refers to sending sludge to coal-fired boilers, waste incinerators and other boilers for combustion. Due to severe geographical restrictions, most of them cannot be disposed of on-site and require resource allocation such as power plants to achieve

Method used

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  • Internal circulating fluidized bed gasification furnace adapted to organic solid waste treatment
  • Internal circulating fluidized bed gasification furnace adapted to organic solid waste treatment
  • Internal circulating fluidized bed gasification furnace adapted to organic solid waste treatment

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specific Embodiment

[0039] Specific example: a sewage plant to be disposed of sludge 100 tons / day (moisture content 80%), using gasification coupling drying integrated process, according to energy balance, dry 100 tons of wet sludge with a moisture content of 80% to 30% moisture rate of dry sludge, an additional 0.6t / h of biomass needs to be supplemented while utilizing the energy of dry sludge. The dried dry sludge and supplemented biomass are respectively conveyed to the biaxial screw, fully stirred and mixed, and then sent to the internal circulating fluidized bed gasifier. The equivalence ratio of the system is 0.28, and 1100m3 / h of air is required for gasification of dry sludge and biomass mixture. The air is pressurized by the blower and sent to the air chamber at the bottom of the gasifier evenly distributed, and then flows out through the air guide holes of the air cap on the air distribution plate, driving the bed material and materials to turn over and disturb continuously, and the ba...

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Abstract

The invention discloses an internal circulating fluidized bed gasification furnace adapted to organic solid waste treatment which comprises a gasification furnace body, a furnace arch, a feeding hole,a blower nozzle and a slag discharging opening. A hearth is arranged in the gasification furnace body; the furnace arch is arranged on one side of the interior of the hearth; the feeding hole is formed in the other side of the interior of the hearth; the blower nozzle communicates with the hearth, and is arranged below the furnace arch; and the slag discharging opening is formed in the lower endof the hearth. Uniform air distribution can be realized in a high-flow-velocity fluidization area at the lower part of the hearth; through an internal circulation enhanced reaction zone in the middleof the hearth, the internal circulation of particles can be realized, the gasification reaction intensity is improved, the residence time is prolonged, and the conversion rate is improved; and in a dilute phase area at the upper part of the hearth, a proper height-diameter ratio is adopted, so that the reduction reaction time of gasified synthesis gas is prolonged, combustible gas with higher quality is obtained, the carbon content of fly ash is reduced, and the emission of dioxin and NOx is reduced.

Description

technical field [0001] The invention relates to the technical field of gasification furnaces, in particular to an internal circulating fluidized bed gasification furnace suitable for the treatment of organic solid waste. Background technique [0002] Sludge contains a large amount of organic pollutants (such as: benzene, chlorophenols, polychlorinated biphenyls (PCBs), etc.), pathogenic microorganisms, heavy metals (Cu, Cd, and Cr, etc.), salt, nitrogen, phosphorus and other nutrients. It will cause serious ecological environmental pollution such as excessive organic pollutants and heavy metals in water and soil, pathogen flooding and eutrophication of water. It is imminent to develop sludge treatment and disposal technology suitable for the characteristics of sludge in my country and the requirements of ecological civilization construction. [0003] Common sludge treatment and disposal methods include sanitary landfill, anaerobic digestion, aerobic fermentation composting ...

Claims

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Application Information

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IPC IPC(8): F23G5/027F23G5/30F23G5/44F23G7/00F23G7/10F23J1/06F23L1/00
CPCF23G5/0276F23G5/30F23G5/444F23G7/001F23G7/10F23J1/06F23L1/00
Inventor 余桥袁鹏飞谭明照任少辉马彩凤周桃红张立民
Owner HUBEI JIADE TECH
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