Pressurized fluidized bed gasifier and method for operating the same

Abstract

The invention discloses a pressurized fluidized bed gasifier, comprising: a reactor, a biomass feeder, an inert gas conveying gas source, an air balance gas source and a vapor generator, wherein the reactor is respectively connected with the biomass feeder and the vapor generator via pipelines and is used for mixing and heating the biomass powders, input through the biomass feeder, and the vapor, input by the vapor generator, to generate combustible gas. The invention further provides a method for operating the pressurized fluidized bed gasifier. The pressurized fluidized bed gasifier and the method for operating the pressurized fluidized bed gasifier according to the invention are suitable for the gasification of biomass powders at high pressure, and particularly achieve the improvement on the sealing transmission of a stirring device and a spiral feeding device in the feeder so that both adapt to the feeding of biomass powders in high-pressure environment, thus the problem that low-density fine powders tend to bridging and are not liable to enter the reactor at next stage is solved.

Description

technical field [0001] The invention relates to a gasification furnace for generating combustible gas by gasifying biomass such as agricultural waste stalks and forestry waste sawdust, and an operation method thereof, in particular to a pressurized fluidized bed gasification furnace and an operation method thereof. 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 milli...

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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