Integrated downdraft biomass gasification device and method

Abstract

The invention discloses an integrated downdraft biomass gasification device and method. The biomass gasification device comprises a hopper, a reactor, a slag barrel, a cyclone dust collector, and an air preheater, the biomass gasification device is characterized in that the hopper, the air preheater, the slag barrel and the reactor are integrated into one compact whole, thermal efficiency of a entire system is greatly improved, the system is suitable for gasifying cornstalkpellet, wood chips, crushed coconut shells and other carbon containing biologic materials into a combustible gas, and thegenerated fuel gas can be used as a gas for life, provide energy sources for boilers and other equipment which needs thermal energy, and be directly sent to a gas genset to be burned to generate electric energy. According to the integrated downdraft biomass gasification device and method, the structure is compact, universality is high, and energy utilization is high; and reliability, convenience and easy operation are achieved.

Description

technical field [0001] The invention belongs to the technical field of biomass gasification, in particular to an integrated downdraft biomass gasification device and method. Background technique [0002] Biomass is the fourth largest energy resource next to coal, oil, and natural gas, accounting for 14% of the world's total energy consumption, and China's annual consumption of biomass energy accounts for 30% of the world's total biomass consumption. my country is a large agricultural country, with an annual crop straw output of about 720 million tons, of which about 400 million tons can be used as energy. According to incomplete statistics, about 240 million tons of crop stalks are burned directly by farmers in low-efficiency stoves or discarded in the fields for direct incineration in my country every year, which not only wastes resources but also seriously pollutes the environment. [0003] The "Renewable Energy Law" clearly stated that "the state encourages and supports ...

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Problems solved by technology

[0006] 1. At present, the thermal efficiency of biomass gasification devices on the market is low, and the energy utilization rate is only 11%-30%.

Moreover, the system is complex, the floor area is too large, and the investment cost is high

[0007] 2. The effect of the reactor in the existing biomass gasification device on the market is poor, and the content of combustible gas tar generated is relatively high

It is necessary to set up filter equipment such as sprinklers and electric coke catchers for purification, and the system is too large and complicated

[0008] 3. The existing biomass gasification devices on the market will produce a large amount of tar-containing sewage, causing secondary pollution

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