Self-heating biomass pyrolysis gasification device and method with self-purification function

Abstract

The invention belongs to the technical field of biomass energy sources and discloses a self-heating biomass pyrolysis gasification device and method with a self-purification function. The device comprises a biomass pyrolysis gasification module and a separation filtration module, wherein the biomass pyrolysis gasification module comprises a biomass feeding pipe, a pyrolysis furnace gasification furnace, a pyrolysis furnace material returning device, a material returning pipe bin and a catalyst feeding pipe. The separation filtration module comprises a primary separator and a secondary separator connected with the primary separator, wherein the primary separator is connected with a material returning pipe through a material separation returning device, and a discharge port of the secondaryseparator is connected with the pyrolysis furnace to obtain clean pyrolysis gas. The invention also discloses a corresponding method. The device can reduce the heat loss in a biomass pyrolysis gasification process, achieve complete self-supply of energy, can self-purify the pyrolysis gas at the same time and has the advantages of compact structure and high heat energy utilization rate. The prepared pyrolysis gas contains no tar, and the cleanliness of gas generated through gasification is high.

Description

technical field [0001] The invention belongs to the technical field of biomass energy, and more specifically relates to a self-heating biomass pyrolysis gasification device and method with self-purification function. Background technique [0002] With the rapid development of the world economy, the consumption rate of traditional energy is also increasing rapidly, and fossil energy resources such as coal, oil, and natural gas are becoming increasingly exhausted. Human beings urgently need to develop renewable energy resources to supplement and replace existing fossil energy resources. . Biomass energy is a renewable and clean energy, and it is the fourth largest energy source after coal, oil, and natural gas. It has low sulfur oxide, nitrogen oxide emissions and zero net carbon dioxide emissions during its use. It is of great significance to alleviate the increasingly serious environmental problems. [0003] At present, the utilization methods of biomass at home and abroad...

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Problems solved by technology

[0004] The biomass is first pyrolyzed to extract the pyrolysis gas, and then the coke is gasified to produce CO and H 2 The clean gas fuel as the main source of biomass has become a highly efficient utilization method of biomass, but currently the pyrolysis and gasification of biomass are mostly two independent devices, and a large amount of heat from the gasifier is lost to the environment and the pyrolysis The furnace requires additional heating equipment to maintain the pyrolysis temperature. At the same time, the pyrolyzed coke will also lose more heat when it is transferred from the pyrolysis furnace to the gasifier, resulting in a significant decrease in overall thermal efficiency. In addition, the pyrolysis gas generally contains relatively high Many tar and coke particles also make its subsequent utilization relatively difficult

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