Biomass pyrolysis gasification power generation furnace with full energy utilization Based on the combination of biomass characteristics and rapid pyrolysis equipment, the fluidized bed semi-coke gasification and biomass hydro pyrolysis technology are coupled, and the circulating fluidized bed staged pyrolysis gasification technology is the core, and the raw materials are processed into hydrogen Pyrolysis increases the methane content, thereby increasing the calorific value of the fuel gas, without generating wastewater, tar, fly ash and other pollution, rationally using potassium, magnesium, and silicon resources to achieve the efficient and comprehensive utilization of biomass energy. Its technical principles include hydrogen pyrolysis technology, semi-coke gasification technology, gas purification technology, the complete process has no secondary pollution, no exhaust gas emissions, and no dioxin generation.
Biomass pyrolysis gasification technology process Process flow diagram of biomass pyrolysis gasification power generation (air gasification) Process flow diagram of biomass pyrolysis gasification power generation (oxygen enrichment) (1) Raw material pretreatment After being crushed by the pulverized, the biomass raw materials enter the drying and lifting device, and the biomass particles are dried and upgraded using low-temperature flue gas at about 120°C to remove moisture. (2) Pyrolysis and gasification reaction The dried biomass particles enter the intermediate silo and are fed into the lower part of the gasification furnace through a screw feeder and are quickly mixed with the circulating heat carrier and high-temperature fuel gas to perform a high-temperature hydrogen pyrolysis reaction to generate high-calorific value gas. The tar is completely cracked in this process, producing small molecular gas. The high-temperature materials are circulated back to the bottom of the furnace and undergo combustion and gasification reactions with air and low-pressure steam at an elevated temperature of about 900°C to generate CO, H2, CO2, etc. (3) Gas purification The gas at the outlet of the gasifier is returned to the bottom of the fluidized bed as the raw material for gasification through the semi-coke and carrier through the first and second horizontal gas-solid high-efficiency separation of the gas and solid; the fine powder separated by the three-stage separator is sent as silicon potash fertilizer. After dust removal, the gas enters the waste heat boiler to recover heat, and then is purified by a two-stage moving bed, cooled, and sent to the power generation system. (4) Gas power generation The purified gas directly enters the internal combustion engine for power generation; it can also be compressed and boosted and then enters the gas turbine for power generation. The waste heat recovery steam enters the steam turbine for power generation, which improves the overall power generation efficiency.
Circulating fluidized bed gasifierProduct advantages Wide fuel adaptability and low operating cost The cheap 0-12mm pulverized coal is used as raw materials. Available coal types include lignite, long-flame coal, non-sticky bituminous coal, weakly sticky bituminous coal, coke powder, and mixed coal. Inside the furnace. Flexible choice of the gasifier According to the different requirements of different fuels and users for the effective gas of the gas, the gasifier can be flexibly selected in air, air + water vapor, oxygen-enriched air / pure oxygen + steam. Large load adjustment range It can be adjusted smoothly in the range of 40% ~ 110% of the design load; it is convenient to start and stop the furnace, and it can be shut down in a few minutes. Stable and reliable operation The gasifier operates under slightly positive pressure (normal pressure), which is safe and reliable; the continuous operation rate is high; the system is fully loaded, continuous and stable operation, which can achieve unplanned shutdowns throughout the year. The high energy efficiency of the system The air preheater and the waste heat boiler are used to recover the waste heat of high-temperature coal gas and generate high-temperature gasifiers and steam as gasifiers. The resulting fuel gas consumes low coal and syngas, and the gas efficiency is> 85%, and the overall gas production cost is low. Clean and environmentally friendly No tar and phenolic substances are produced in the gas production process; dry ash is taken out without wastewater; and the generated gas is desulfurized, dust-removed, and demoniac condensed water treated to achieve zero emissions of hazardous substances, which meets the requirements of national environmental protection skills. Secondary use of waste To respond to the call of the country's circular economy, the waste in the gas production process can also be used internally and the heat can be recovered for power generation, drying, and heating processes. International leading gasification technology CXL series products have passed the identification of experts from China Petroleum and Chemical Industry Federation, China Machinery Industry Federation, and China Electrical Engineering Society: atmospheric pressure circulating fluidized bed coal gasification industrial gas technology has reached an international leading level, clean and environmentally friendly! Clean coal gas production process Though the coal conveying system, 0-12 mm pulverized coal fuel was transferred to the furnace center to react with the hot temperature (550ºC-650ºC) preheat gasification agent (air, air-water vapor, and oxygen enrichment, etc.) generating CO, H2, and a small amount of CH4. Gasification agents can choose freely. The unreacted fuel was returned to the furnace through the regenerator for a high-rate cycle reaction. The coal gas is cooled to about 700ºCafter the air preheater and then kept cool to around 220ºC by the waste heat boiler. Then it enters the desulfurization system after being cooled and dusted by the cyclone separator, cooler, and bag filter. Finally, clean gas is pressured to the gas supply point. Hot coal gas production process:
According to the needs of the process, hot gas is produced; after the gas, at 950 ° C is separated from the solid by the cyclone, the high-temperature semi-coke of fine particles continues to return to the furnace through the regenerator to participate in the reaction. The gas is cooled to about 700 ° C through the air preheater. After that, the dust is removed by the secondary cyclone and then supplied to the user. According to the unique needs of users for gas, 600 ° C-700 ° C hot gas and 35 ° C clean gas can be provided. Circulating fluidized bed gasifier Application case Circulating fluidized bed gasifier is widely used in steel, ceramics, metal magnesium, aluminum, refractory material, glass, metallurgy, and other industries.
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