Biomass non-pressure gas making machine

Abstract

The invention discloses a biomass stress-free gas producing machine which comprises a machine, an air inlet oxygen-feeding device, a rotary dedusting device and a circulating hot water supply device; the biomass stress-free gas producing machine is characterized in that the machine is internally provided with a gas producing collision reaction device and more than one set of parallel-connected orserially-connected gas producing reaction device; each set of gas producing reaction device comprises a gasification furnace, a wastewater and tar high-temperature pyrolysis reaction device and a swaging actuating device; the wastewater and tar high-temperature pyrolysis reaction device is filled with dolomite; the secondary pure gas output tubes arranged at the bottom of each set of the wastewater and tar high-temperature pyrolysis reaction device are connected with the bottom of the collision reaction device after serially connected or parallel connected subsequently. The biomass stress-free gas producing machine is a novel gasification device to carry out second decomposition on the wastewater and tar by using the high-temperature chemical reaction of the wastewater and tar and the dolomite, which takes the dolomite as medium to carry out decomposition on the wastewater and tar by high temperature, so as to actually achieve the goals of zero emission, no secondary pollution, green environmental protection and large-scale gas production in the biomass gas producing technology.

Description

technical field [0001] The invention relates to combustion equipment, in particular to a biomass pressureless gas generator which uses low-quality solid biomass as a raw material for large-scale gas production. Background technique [0002] Biomass gasification technology refers to the use of oxygen or oxygen-containing substances in the air as a gasification agent to convert biomass into hydrogen-containing 2 , CO, CH 4 Process such as combustible gas. At present, biomass thermochemical conversion technology is the most practical one in gasification technology. It converts low-quality solid biomass into high-quality combustible gas. It can be widely used to drive internal combustion engines, heat generators for power generation and agricultural use. Irrigation equipment, or directly used for cooking, heating, crop drying and industrial product drying, etc. Low-quality solid biomass is food and agricultural and forestry crop waste (such as chaff, sawdust, straw), various ...

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Problems solved by technology

Low-quality solid biomass is food and agricultural and forestry crop waste (such as chaff, sawdust, straw), various combustible domestic and medical waste, and combustible waste derived from various industrial products. It is an inexhaustible alternative energy source and a precious renewable resource. However, the utilization technology of biomass energy in my country lags behind, and the utilization rate is less than 10%. Most of the rest are discarded or burned, which is a pity.

In the process of biomass gasification, the main problems after the generation of tar are: (1) tar accounts for 5%-10% of the combustible gas energy, and it is difficult to be burned and utilized together with the gas at low temperature, and the waste is serious; (2) Tar condenses into a liquid at low temperature, and is easy to combine with water and carbon particles to block gas pipelines, block valves, corrode metals, and cause normal combustion; (3) tar is difficult to burn completely and produces carbon black and other particles , causing serious damage to gas equipment; (4) tar and the smell it produces after burning have a slight damage to the human body

In the past, simple methods such as water washing or filtering only separated the tar from the gas, which not only wasted the energy of the tar itself but also produced a lot of pollution. Thermal cracking required a high temperature and sufficient residence time, and it was difficult to realize , the catalytic cracking method reduces the tar content in the gas, which is the most effective and advanced method at present, and is gradually adopted in large and medium-sized gasifiers

In catalytic cracking, the most critical issue is the selection of catalysts. A large number of experiments have proved that many materials have a catalytic effect on tar cracking, such as: Ni-based and heavy oil cracking catalysts, which have high activity and good effect. High cracking rate, but their cost is high, and carbon deposition is easy to cause its deactivation, so it is difficult to apply in general biomass gasification technology

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