Tail gas treatment method of biomass incinerator

Abstract

The invention provides a biomass incineration tail gas treatment method. The biomass incineration tail gas treatment method mainly comprises the following steps: enabling biomass incineration tail gasto pass through a high-temperature region and melting ash residues; then enabling the biomass incineration tail gas to pass through a low-temperature region and condensing into a block; then carryingout gravitational sedimentation to remove large-particle ash residues; then carrying out heat exchange and cooling the temperature of the tail gas to 130 to 170 DEG C; then removing dust through a ceramic filter and a cloth bag to remove micron dust; treating the tail gas through a heat exchanger and reducing the temperature, so as to condense water steam into liquid-state water; then recycling the liquid-state water into a liquid storage tank; after drying residual water steam through a drying tank, raising the temperature of the tail has to 110 to 140 DEG C through heat exchange of a hearthand directly introducing the tail gas into a catalysis tank 1; taking carbon monoxide in the tail gas as a reducing agent and removing nitrogen oxide; then enabling the tail gas to pass through a catalysis tank 2; removing the residual carbon monoxide and volatile organic pollutants by utilizing excessive oxygen in the tail gas; after an instrument monitors that the tail gas is qualified, discharging the tail gas through an activated carbon security tank. The biomass incineration tail gas treatment method provided by the invention has the advantages of simple and feasible procedure and relatively low energy consumption and material consumption; the biomass incineration tail gas treatment method is especially suitable for biomass incineration tail gas treatment in a controlled ecological life-support system.

Description

technical field [0001] The invention belongs to the technical field of waste treatment, in particular to a tail gas treatment method of a space biomass incinerator. Background technique [0002] With the development of space exploration technology, future manned deep space exploration missions and alien planet migration become possible. In order to ensure that human beings can survive in a small and confined space, it is necessary to establish an artificial ecological cycle system, that is, a bio-regenerative life support system. Among them, the incinerator is one of the necessary means to return material elements such as carbon, hydrogen, oxygen, and inorganic salts to the material flow cycle through high-temperature oxidation of solid waste such as inedible biomass. However, the biomass incineration flue gas contains ash, ash, water vapor, NO x , CO and VOCs, the composition is very complex. In order to directly discharge the flue gas to each cabin, various pollutant in...

AI Technical Summary

Problems solved by technology

Although the United States has completed a 90-day test with four people using the above-mentioned tail gas treatment process, the process has the following shortcomings: 1) The cyclone dust collector increases the overall power consumption and maintenance costs of the system, 2) Catalytic reduction consumes ammonia water, which increases the burden of material supplies. 3) The high operating temperature of the catalyst results in high power consumption to maintain the normal operation of the system

[0004] In the published patents or documents, the treatment of biomass incineration tail gas is mostly large-scale technology or process such as industry and agriculture, and the tail gas emission requirements are relatively loose, which cannot meet the experimental research of bio-regenerative life support system carried out in my country

However, the incinerator tail gas treatment process used in the United States in the 1990s has many shortcomings and is outdated and backward. These technologies cannot meet the requirements of the future bio-regenerative life support system for biomass incinerator tail gas emissions.

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