Biomass gasified gas system and ash removal and slag discharging dust removal system thereof

Abstract

The invention discloses a biomass gasified gas system and an ash removal and slag discharging dust removal system thereof. The biomass gasified gas system comprises a feeding system, a gasification system and an ash removal and slag discharging dust removal system, wherein the feeding system is connected with a control system for harmonically controlling various systems to work; and the feeding system, the gasification system and the ash removal dust collection system are successively connected with one another from top to bottom. The ash removal and slag discharging dust removal system comprises a funnel-shaped ash sieve, a fire grate capable of being movably opened, an ash receiving hopper and a spiral conveying device. The biomass gasified gas system has the advantages of scientific and compact structure, capability of sufficiently utilizing the space and sufficiently realizing the automation of each step, high automation level, convenience in use, high efficiency in gas production, low gas outlet temperature, capability of preventing explosion of gasified gas, safety and reliability; ash and dust of the gasified gas are effectively removed, the environmental pollution is effectively reduced, the service life of relevant devices is prolonged, energy is saved, and the environment is protected; accumulated ash or coking blocks are convenient and rapid to remove; and a positive effect for enlarging the application of recyclable biomass energy can be realized.

Description

technical field [0001] The invention relates to a cooker, in particular to a gasification combustion cooker using 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. 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 a...

AI Technical Summary

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

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

[0003] For this reason, a small-scale ash discharge and dust removal system device for gasifying biomass such as firewood and straw into combustible gas and a biomass gasification gas system using this device came into being. However, there are some defects in the updraft 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 difficult maintenance problems; (2) the gas production Unstable, the gasification of biomass is difficult to control, which greatly affects the promotion of gasification stoves; (3) The calorific value of gas production is low, and the gasification of biomass is not sufficient enough to make the calorific value of gas production not meet the daily use requirements

However, in the follow-up improvement process of the inventor, many defects were still found: a single fan 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

However, with the expansion of gasification furnaces in industrial applications, such as replacing natural gas boilers with biomass gas generated by gasification furnaces, the existing technologies still have some defects in industrial application scenarios: (1) Although the problem of tar is solved, However, the feeding is not automated, and it takes a lot of labor and high labor costs when it is used in industry; (2) The ash content in the furnace core cannot be automated, and it is difficult to connect with industrial automation; (3) The ash and dust content in the gasification gas is high , the gas is not pure, clean and environmentally friendly, and cannot meet the requirements of long-distance gas transmission and internal combustion engine power generation, and is not suitable for large-scale industrial use; (4) The waste heat of gasification reaction is not fully utilized, and the high-temperature heat in the gasification gas is not sufficient use

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