Dry purification system for agriculture and forest biomass gasified gas

Abstract

The invention discloses a dry purification system for agriculture and forest biomass gasified combustible gas. The dry purification system is characterized by comprising a dust and coke removing system, a condensation and separation system, a purification and drying system and a tar moisture collecting and separation system, wherein a fine powder separator in the dust and coke removing system is connected with a centrifugal dust and coke removing machine through a middle electric valve; the condensation and separation system is formed by serially connecting two stages of efficient condensers; a draught fan is arranged between the condensation and separation system and the purification and drying system; the purification and drying system is connected together with a dryer through a purification tower; and the tar moisture collecting and separation system is used for separating collected tar and water through two helixes. The invention has the advantages that: the dry purification system is used for substituting the existing wet purification system, so that a large quantity of extract is not produced, and the environment is not polluted. Through the dry purification system, clean combustible gas is finally obtained; and the system meets the requirement of an internal-combustion engine for gas and the requirement of a boiler for gas supply, and is scientific and reasonable in composition.

Description

technical field [0001] The invention relates to a dry purification system for gasification gas of agricultural and forestry biomass, which belongs to the fields of thermal energy engineering and chemical engineering. Background technique [0002] Currently, there are two major problems in the system application of the purification system used for the gasification of agricultural and forestry biomass gasification: 1. The gas treated by cyclone separation in the existing gas-liquid separation system contains a large amount of fine dust, which affects the tar and extractant quality. 2. The existing gas-liquid separation adopts a wet separation system, which produces a large amount of extraction liquid. The application of the extraction liquid has not been widely promoted at present, resulting in secondary pollution caused by the generated extraction liquid. Contents of the invention [0003] The present invention proposes a dry purification system for gasification gas of agr...

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Problems solved by technology

[0002] Currently, there are two major problems in the system application of the purification system used for the gasification of agricultural and forestry biomass gasification: 1. The gas treated by cyclone separation in the existing gas-liquid separation system contains a large amount of fine dust, which affects the tar and extractant quality

2. The existing gas-liquid separation adopts a wet separation system, which produces a large amount of extraction liquid. The application of the extraction liquid has not been widely promoted at present, resulting in secondary pollution caused by the generated extraction liquid.

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