A biomass gasification stove

Abstract

The invention discloses a biomass gasification stove. The biomass gasification stove is mainly characterized in that a smoke discharge chamber and a stock bin opening booster chamber are respectively formed in the upper part of a fuel bin, wherein a stock bin cover is arranged in the middle of the stock bin opening booster chamber; a flue gas channel is formed between a water tank and a furnace core; the gasification furnace core is communicated with the fuel bin and an ash collecting chamber, respectively; a funnel-shaped furnace grate with a ash shaking device and a movable fence gate is arranged between the gasification furnace core and the ash collecting chamber; a thermal insulation layer is arranged between the inner and outer walls of the gasification furnace core; the inner wall of a gasification reaction chamber in the gasification furnace core is an extension tube capable of freely stretching out and drawing back; an air spray nozzle is arranged on the side wall at the upper side of the gasification reaction chamber; an ignition device is arranged in the thermal insulation layer. The biomass gasification stove has the advantages that the structure is compact; the gasification reaction temperature is as high as 1200 DEG C; the heat-up starting time is short; the ignition is convenient and the gas production is efficient; hot water can be produced by heating the water tank, and tar which is mixed in a biomass fuel gas can be further removed to realize energy conservation and environment protection and prolong service lives of relevant appliances; the accumulated ashes or coked blocks are conveniently and quickly removed.

Description

technical field [0001] The utility model relates to a stove, in particular to a gasification combustion stove which uses biomass raw materials such as firewood and straw as fuel. Background technique [0002] my country is a large agricultural country, and there is sufficient biomass energy such as firewood and straw. In the development and utilization of biomass energy, the common method is direct combustion or gasification power generation. However, when direct combustion is used, fuelwood needs to be added to the stove frequently. , it is inconvenient to use, gasification power generation is limited by the cost, and the economic benefits are not good, so it cannot be widely applied. [0003] Traditional stoves have a long history of using firewood and straw. Traditional stoves are inconvenient to use and have a low utilization rate of calorific value, generally only 15% to 20%, which causes serious air pollution. It is also gradually abandoned in the vast rural areas, res...

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Problems solved by technology

[0002] my country is a large agricultural country, and there is sufficient biomass energy such as firewood and straw. In the development and utilization of biomass energy, the common method is direct combustion or gasification power generation. However, when direct combustion is used, fuelwood needs to be added to the stove frequently. , inconvenient to use, gasification power generation is limited by cost, poor economic benefits, and cannot be widely applied

[0003] Traditional stoves have a long history of using firewood and straw. Traditional stoves are inconvenient to use and have a low utilization rate of calorific value, generally only 15% to 20%, which causes serious air pollution.

It is also gradually abandoned in the vast rural areas, resulting in less and less development and utilization of biomass energy, and cannot effectively utilize a large amount of renewable firewood and straw in rural areas

[0004] For this reason, a small-scale biomass gasification stove that gasifies biomass such as firewood and straw into combustible gas has emerged at the historic moment. People have invented an updraft gasification stove that sucks the generated gas upward. There are some defects in the gasification stove: (1) The high tar content leads to the short life of the gasification stove, and even if the filter is added, there will be a problem of difficult maintenance; (2) The gas production is unstable, and the gasification of biomass is difficult to control. It has greatly affected the promotion of gasification stoves; (3) The calorific value of gas production is low, and the gasification of biomass is not sufficient enough so that the calorific value of gas production cannot meet the daily use requirements

However, in the follow-up improvement process of the applicant, many defects were still found: a single blower makes the total power of the stove difficult to meet the requirements of daily life; Poor thermal expansion and contraction performance, incomplete gasification, insufficient internal temperature of the gasification furnace core, insufficient pyrolysis reaction of tar, incomplete removal of tar and other defects, resulting in unsatisfactory gas production stability of biomass fuels such as firewood and straw ;In the process of use, there are often foreign objects, such as stones, iron nails, and coked pieces of ashes, and the small holes of the grate cannot pass through at all. After a long time, the gasifier will produce unstable gas, or even completely fail; in actual use Inconvenient, hindering its popularization and application

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