System for preparing high-caloric-value biomass gasified gas by using high-temperature flue gas of oxygen-enriched combustion boiler

Abstract

The invention discloses a system for preparing biomass gasified gas by using flue gas of an oxygen-enriched combustion boiler. The system is characterized by comprising a circulating fluidized-bed gasifier and a cyclone separator, wherein the circulating fluidized-bed gasifier is provided with a charging opening which is used for inputting a biomass material to the circulating fluidized-bed gasifier; the circulating fluidized-bed gasifier is further provided with a gas inlet which is used for inputting the flue gas of the oxygen-enriched combustion boiler; the circulating fluidized-bed gasifier is used for gasifying the biomass material under the action of the flue gas of the oxygen-enriched combustion boiler, so as to obtain the gasified gas; the cyclone separator is connected with the circulating fluidized-bed gasifier and is used for separating the gasified gas. A biomass gasification system and an oxygen-enriched combustion boiler system are used in a matched manner, and the flue gas of the oxygen-enriched combustion boiler is adopted as a gasifying agent for biomass gasification reaction, so that the energy utilization efficiency of the oxygen-enriched combustion boiler system is increased, the quality of the biomass gasified gas is improved, the whole heat energy utilization efficiency is increased, and the production cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of producing high calorific value gasification gas by biomass gasification, and more specifically relates to a system for producing biomass gasification gas by using high-temperature flue gas of an oxygen-enriched combustion boiler. Background technique [0002] Biomass energy is energy converted from solar energy and stored in biomass in the form of chemical energy. Biomass used as energy mainly includes agricultural and forestry waste, livestock and poultry manure, organic wastewater, etc. Compared with traditional energy sources, biomass energy has obvious advantages, renewable and non-polluting. In the current environment where global fossil energy is in short supply, biomass energy has a very promising development prospect. [0003] Biomass gasification technology, as a kind of thermochemical utilization of biomass energy, uses oxygen, carbon dioxide, air, water vapor or a mixture of these gases as a ...

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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the object of the present invention is a system for producing biomass gasification gas from high-temperature flue gas of an oxygen-enriched combustion boiler, wherein the key gasification gas medium, gas input and output Compared with the existing technology, it can effectively solve the problems of high cost of biomass gasification and low calorific value of gasification gas. The adjustment of gasification gas can achieve the technical effect of further adjusting the composition of gasification gas and improving the performance of gasification gas

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