Biomass feeder for pressurized fluidized bed gasifier

Abstract

The invention provides a biomass feeder for a pressurized fluidized bed gasifier, which comprises a sealed hopper with a non-magnetic conductive top cover, a stirring device and a spiral feeding device. The invention draws lessons from the basic working principle of magnetic transmission, respectively improves the stirring device and the spiral feeding device, so as to achieve the purpose of sealed transmission. The biomass feeder for the pressurized fluidized bed gasifier of the invention is applicable in the feeding of biomass powder under high-pressure condition and gasification in the gasifier, particularly improves the stirring device and the sealed transmission of the spiral feeding device so that the spiral device and the spiral feeding device are applicable in the feeding of biomass powder in high-pressure environment, thereby solving the problems that the low-density fine powder is easy to be lapped, bridged, channeled and cohered into a group, and is not easy to enter the next stage of reactor, so as to disclose a technical scheme which can realize continuous and stable feeding at high pressure and lead the material to enter the reactor continuously and stably.

Description

technical field [0001] The present invention relates to a pressurized fluidized bed gasification furnace which utilizes biomass gasification such as agricultural waste stalks and forestry waste sawdust to produce combustible gas etc., especially relates to a pressurized fluidized bed gasification furnace biomass feeder. Background technique [0002] my country is a big energy consumer, the primary energy consumption is second only to the United States, and it is the second largest energy consumer in the world. In the face of non-renewable fossil energy, CO 2 In the severe situation of increasing emissions, the development of renewable energy and the adjustment of energy structure are important guarantees for maintaining my country's sustainable development strategy. Biomass energy refers to the energy converted from natural plants, manure, and urban and rural organic waste. In my country, biomass energy resources are very rich. The annual amount of rural straw is about 600...

AI Technical Summary

Problems solved by technology

[0005] However, most of the existing pressurized fluidized bed gasifiers are designed for the gasification of pulverized coal particles, so their feeding devices are suitable for pulverized coal particles with high density and good fluidity, while for light, Biomass materials with low density, large angle of repose, and poor fluidity are difficult to achieve stable feeding under pressurized conditions

Therefore, the existing biomass pressurized gasification device and its method have the defects of uneven feeding and unstable gasification process.

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