A downdraft biomass gasifier with gas outlet in the middle
A gasification furnace and biomass technology, applied in the direction of biofuel, gasification process, coke oven, etc., can solve the problems of low heat conversion efficiency and short service life of the grate system, so as to improve the drying and carbonization speed, improve the thermal The effect of low conversion efficiency and accelerated drying and carbonization speed
Active Publication Date: 2020-10-02
浙江润昇新能源有限公司
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[0007] The object of the present invention is to provide a downdraft biomass gasifier with gas outlet in the middle to overcome the disadvantages of low heat conversion efficiency and short service life of the grate system in the existing downdraft biomass gasifier
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[0042]The biomass gasification furnace technology and its beneficial effects provided by the present invention will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments.
[0043] see figure 1 , a downdraft biomass gasifier with gas outlet in the middle, including: feed hopper 1, air shutoff device 2, upper furnace body 3, material limiter 4, middle furnace body 5, rotary grate 6, lower furnace body 7. Slagging device 8.
[0044] The feed hopper 1 is an inverted cone, with a wide mouth at the top of 1.5 meters long and 1.5 meters wide, a cone mouth at the lower part with a length of 0.3 meters and a width of 0.3 meters, and a total height of 1.5 meters. The feed hopper is arranged above the air lock 2, and is used for loading and controlling the biomass raw material entering the furnace body.
[0045] The air shutoff device 2 is a star-shaped blanking device with an opening of 300mm×300mm, which is installed on the outer...
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The invention discloses a downdraft biomass gasification furnace capable of discharging gas from the middle part. Fuel gas is combusted directly to generate high-temperature flue gas, and a mixed gasof the high-temperature flue gas and hot air is used as a gasifying agent, so the drying and carbonizing speed of a biomass raw material is effectively increased, and a high-temperature area in the furnace integrally moves upwards. A special furnace body structure is designed, and four right-angle areas are formed by utilizing the change from a cylindrical furnace body to a square furnace body; and the gas is discharged from the four right-angle areas (which are the middle part of the furnace body), so that gasification areas distributed at four side surfaces can be formed. The downdraft biomass gasification furnace can avoid calcination of a rotary fire grate at the lower part, so the service life of the rotary fire grate is prolonged; and the downdraft biomass gasification furnace makesthe combustion and gasification reactions in the furnace body distributed uniformly, so empty combustion and deviant combustion are effectively prevented.
Description
technical field [0001] The invention relates to the field of biomass thermochemical conversion, and more specifically relates to a device for pyrolysis and gasification of biomass. Background technique [0002] Biomass energy is a kind of renewable energy, which is the solar energy stored in the form of biomass by photosynthesis of plants. According to incomplete statistics, the energy stored in biomass through photosynthesis on the earth's surface every year is equivalent to 10 times the current human consumption. Unfortunately, the current utilization of biomass energy is less than 1% of the new increase in biomass. [0003] The direct combustion of biomass fuel will cause a lot of dust content and difficult post-processing. At present, the mainstream technology is to gasify the biomass fuel first, and then carry out secondary combustion on the synthesis gas produced by the gasification. There are two types of fixed bed biomass gasifiers: updraft and downdraft. Among t...
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IPC IPC(8): C10J3/20C10B53/02
CPCC10B53/02C10J3/20C10J2300/0916C10J2300/0956Y02E50/10
Inventor 王晓红陈文雄杨嘉欣
Owner 浙江润昇新能源有限公司