Biomass pellet pyrolysis semi-gasification furnace

Abstract

The biomass particle pyrolysis semi-gasification furnace comprises a combustion furnace, a gasification settling chamber which is narrow at the top and wide at the bottom is arranged on one side of the combustion furnace, a fire outlet is arranged at the top of the gasification settling chamber, a gasification settling hood which is narrow at the top and wide at the bottom is fixedly installed at the fire outlet in the gasification settling chamber, a notch is arranged at the bottom of the side wall of the gasification settling hood, and a spiral guide plate is fixedly installed between the gasification settling chamber and the gasification settling hood, a fire pipe is connected between the combustion furnace and the gasification settling chamber, a ring-shaped and hollow air collecting disk is fixedly installed at the top of the gasification settling chamber at the fire outlet, radially inclined air collecting ports are evenly arranged on the inner circumference of the air collecting disk, and the side wall of the air collecting disk is connected to the fan through the first air duct. It can recycle the generated smoke and dust to prevent the smoke and dust from drifting into the atmosphere to pollute the environment, re-ignite the incompletely burned combustible gas, improve the thermal conversion rate of the fuel, save energy, and prevent the pipeline from being blocked due to the generation of tar.

Description

Technical Field

[0001] The invention relates to a biomass particle stove, in particular to a biomass particle pyrolysis semi-gasification stove. Background Art

[0002] Biomass pellet stoves are stoves that use biomass pellets made of broken wood, firewood, straw, corn cobs, etc. as fuel, and are widely used in cooking, heating, boiling water, etc. Existing biomass pellet stoves cannot fully burn fuel due to insufficient oxygen supply, producing a large amount of smoke, incompletely burned combustible gas and tar. The smoke and dust produced drift into the atmosphere to pollute the environment, and the incompletely burned combustible gas reduces the thermal conversion rate of the fuel, resulting in energy waste, and the tar produced blocks the pipeline. Summary of the invention

[0003] The present invention aims to solve the above-mentioned technical problems and provides a biomass particle pyrolysis semi-gasification furnace, which can recycle the generated smoke and dust to prevent the smoke and dust from drifting into the atmosphere and polluting the environment, re-ignite the incompletely burned combustible gas, improve the thermal conversion rate of the fuel, save energy, and prevent the blockage of the pipeline due to the production of tar.

[0004] The technical solution of the present invention is:

[0005] The biomass particle pyrolysis semi-gasification furnace includes a combustion furnace, which is special in that: a gasification sedimentation chamber which is narrow at the top and wide at the bottom is arranged on one side of the combustion furnace, a fire outlet is arranged at the top of the gasification sedimentation chamber, a gasification sedimentation hood which is narrow at the top and wide at the bottom is fixedly installed at the fire outlet in the gasification sedimentation chamber, a notch is arranged at the bottom of the side wall of the gasification sedimentation hood, and a spiral guide plate is fixedly installed between the gasification sedimentation chamber and the gasification sedimentation hood, a fire pipe is connected between the combustion furnace and the gasification sedimentation chamber, an annular and hollow air collecting disk is fixedly installed at the top of the gasification sedimentation chamber at the fire outlet, radially inclined air collecting ports are evenly arranged circumferentially on the inner circular surface of the air collecting disk, and the side wall of the air collecting disk is connected to the fan through the first air duct.

[0006] Further preferably, a waste heat recovery box is provided outside the gasification and settling chamber, the fan is fixedly mounted on a side wall of the waste heat recovery box, and an air inlet end of the first air duct is connected to the waste heat recovery box.

[0007] It is further preferred to connect a second air duct between the waste heat recovery box and the overfire pipe, open the second air duct, and provide oxygen to the overfire pipe, so that part of the unburned combustible gas burns in the gasification and settling chamber, thereby reducing the concentration of unburned combustible gas at the fire outlet and reducing the fire power at the fire outlet.

[0008] Further preferably, a third air duct is connected between the waste heat recovery box and the lower part of the combustion furnace, and the third air duct is opened to supply oxygen to the combustion furnace to gasify and burn the fuel in the combustion furnace.

[0009] It is further preferred that a fourth air duct is connected between the waste heat recovery box and the gasification and settling chamber to add a small amount of oxygen into the gasification and settling chamber to prevent flame interruption.

[0010] It is further preferred that a vertically upward wind nozzle is installed at the bottom of the waste heat recovery box, and the wind nozzle extends upward to the fire outlet through the gasification and settling hood, and a fifth wind duct is connected between the waste heat recovery box and the wind nozzle to supplement oxygen to the center of the fire outlet to prevent oxygen deficiency in the center of the flame at the fire outlet.

[0011] It is further preferred that a feeder is installed on the side wall of the combustion furnace, a hopper is installed on the output pipe of the feeder, a sixth air duct is connected between the waste heat recovery box and the output pipe of the feeder, and high pressure is formed in the output pipe of the feeder to prevent smoke in the combustion furnace from flowing back to the hopper.

[0012] It is further preferred that a push plate is installed on the side wall of the combustion furnace below the output pipe of the feeder, and a motor is fixedly installed on the side wall of the combustion furnace. A crank rocker mechanism is connected between the output shaft of the motor and the push plate. The motor drives the push plate to reciprocate, pushing the sintered coke in the combustion furnace away from the outlet of the feeder to ensure normal feeding of the feeder.

[0013] Further preferably, a seventh air duct is connected between the waste heat recovery box and the upper part of the combustion furnace to blow the heat generated when the igniter is ignited to the fuel to ignite the fuel.

[0014] It is further preferred that an annular fire collecting plate is installed on the top of the air collecting plate to concentrate the flame at the fire outlet, and an ash storage bin protruding to one side is provided at the bottom of the gasification settling chamber. The ash storage bin passes through the waste heat recovery box, and a cleaning door is installed at the end of the ash storage bin passing through the waste heat recovery box.

[0015] The beneficial effects of the present invention are:

[0016] 1. Due to the narrow upper and wide lower gasification settling chamber, the narrow upper and wide lower gasification settling hood fixedly installed in the gasification settling chamber at the fire outlet, the spiral guide plate fixedly installed between the gasification settling chamber and the gasification settling hood, the fireworks and incompletely burned combustible gas generated in the combustion furnace enter the gasification settling chamber through the fire pipe. Under the guidance of the spiral guide plate, the fireworks and incompletely burned combustible gas entering the gasification settling chamber move spirally downward, and the centrifugal force and the inclined surface of the side wall of the gasification settling chamber are used to move the combustible gas downward. Under the action of centrifugal force and the inclined surface of the gasification settling hood, the smoke and dust in the fireworks are concentrated on the inner wall of the gasification settling hood, and are thrown out through the notch at the bottom of the side wall of the gasification settling hood and fall to the bottom of the gasification settling chamber, so that the flame discharged through the fire outlet is dust-free, thus preventing the smoke and dust from drifting into the atmosphere and polluting the environment.

[0017] 2. Due to the annular and hollow air collecting plate fixedly installed at the fire outlet of the gasification and settling chamber, the radially inclined air collecting ports evenly arranged on the inner circumference of the air collecting plate, and the fan connected to the air collecting plate through the first air duct, the wind force blown out from the radially inclined air collecting ports on the inner circumference of the air collecting plate provides oxygen to the flame discharged through the fire outlet and the incompletely burned combustible gas, so that the flame discharged through the fire outlet and the incompletely burned combustible gas can be fully burned, thereby improving the thermal conversion rate of the fuel, saving energy, and preventing the pipeline from being blocked by the production of tar. At the same time, wind pressure is formed at the fire outlet to suppress the smoke and dust that are not completely settled in the gasification and settling hood to prevent it from entering the atmosphere. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention;

[0019] Figure 2 yes Figure 1 A top view of

[0020] Figure 3 yes Figure 1 Rear view of

[0021] Figure 4 yes Figure 1 Right side view of the middle combustion furnace;

[0022] Figure 5 yes Figure 1 Top view of the central wind disk;

[0023] In the figure: 1-combustion furnace, 2-waste heat recovery box, 3-gasification sedimentation chamber, 4-gasification sedimentation hood, 5-spiral guide plate, 6-fire pipe, 7-ash storage bin, 8-ash cleaning door, 9-fan, 10-wind gathering plate, 11-wind gathering port, 12-first air duct, 13-second air duct, 14-third air duct, 15-fourth air duct, 16-air nozzle, 17-fifth air duct, 18-feeder, 19-hopper, 20-sixth air duct, 21-push plate, 22-motor, 23-crank rocker mechanism, 24-seventh air duct, 25-fire gathering plate. DETAILED DESCRIPTION

[0024] like Figure 1-Figure 5As shown, the biomass particle pyrolysis semi-gasification furnace comprises a combustion furnace 1, a gasification settling chamber 3 which is narrow at the top and wide at the bottom is arranged on one side of the combustion furnace 1, a fire outlet is arranged at the top of the gasification settling chamber 3, a waste heat recovery box 2 is arranged outside the gasification settling chamber, a gasification settling cover 4 which is narrow at the top and wide at the bottom is fixedly installed at the fire outlet in the gasification settling chamber 3, a notch is arranged at the bottom of the side wall of the gasification settling cover 4, and a spiral guide plate 5 is fixedly installed between the gasification settling chamber 3 and the gasification settling cover 4, and a gasification settling cover 4 is connected between the combustion furnace 1 and the gasification settling chamber 3. Through the fire pipe 6, an ash storage bin 7 protruding to one side is provided at the bottom of the gasification and settling chamber 3, the ash storage bin 7 passes through the waste heat recovery box 2, and a cleaning door 8 is installed at the end of the ash storage bin 7 passing through the waste heat recovery box 2, a fan 9 passing into the waste heat recovery box 2 is fixedly installed on the side wall of the waste heat recovery box 2, and an annular and hollow air collecting plate 10 is fixedly installed at the top of the gasification and settling chamber 3 at the fire outlet, an annular fire collecting plate 25 is installed on the top of the air collecting plate 10, and radially inclined air collecting plates 25 are evenly arranged on the inner circumferential surface of the air collecting plate 10. The first air duct 12 is connected between the waste heat recovery box 2 and the air collecting plate 10, the second air duct 13 is connected between the waste heat recovery box 2 and the overfire pipe 6, the third air duct 14 is connected between the waste heat recovery box 2 and the lower part of the combustion furnace 1, and the fourth air duct 15 is connected between the waste heat recovery box 2 and the gasification and settling chamber 3. A vertical upward air nozzle 16 is installed at the bottom of the waste heat recovery box 2, and the air nozzle 16 extends upward to the fire outlet through the gasification and settling cover 4, and is connected between the waste heat recovery box 2 and the air nozzle 16. The fifth air duct 17 is connected, a feeder 18 is installed on the side wall of the combustion furnace 1, a hopper 19 is installed on the output pipe of the feeder 18, the sixth air duct 20 is connected between the waste heat recovery box 2 and the output pipe of the feeder 18, a push plate 21 is installed on the side wall of the combustion furnace 1 below the output pipe of the feeder 18, a motor 22 is fixedly installed on the side wall of the combustion furnace 1, a crank rocker mechanism 23 is connected between the output shaft of the motor 22 and the push plate 21, and the seventh air duct 24 is connected between the waste heat recovery box 2 and the upper part of the combustion furnace 1.

[0025] The working principle of the present invention is:

[0026] The feeder 18 feeds the fuel into the combustion furnace 1 and ignites the fuel. The fireworks and incompletely burned combustible gas generated by the combustion of the fuel enter the gasification settling chamber 3 through the fire tube 6. Under the guidance of the spiral guide plate 5, the fireworks and incompletely burned combustible gas entering the gasification settling chamber 3 move downward in a spiral. Under the action of the centrifugal force and the inclined surface of the side wall of the gasification settling chamber 3, the smoke in the fireworks is concentrated on the inner wall of the gasification settling chamber 3 and then falls to the bottom of the gasification settling chamber 3. The fireworks and incompletely burned combustible gas in the gasification settling chamber 3 then spiral upward into the gasification settling hood 4 from the bottom of the gasification settling hood 4. Under the centrifugal force and Under the action of the inclined surface of the gasification and settling hood 4, the smoke and dust in the fireworks are concentrated on the inner wall of the gasification and settling hood 4, and then thrown out through the notch at the bottom of the side wall of the gasification and settling hood 4 and fall to the bottom of the gasification and settling chamber 3, so that the flame discharged through the fire outlet is dust-free, and under the action of the wind force blown out by the radially inclined wind gathering port 11 on the inner circular surface of the wind gathering plate 10, oxygen is provided to the flame discharged through the fire outlet and the incompletely burned combustible gas, so that the flame discharged through the fire outlet and the incompletely burned combustible gas are fully burned, and at the same time, the flame discharged through the fire outlet is rotated and ascended for discharge, the flame is concentrated, the heat loss is small, and the thermal energy utilization rate is improved.

[0027] The above are only specific embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A biomass particle pyrolysis semi-gasification furnace, including a combustion furnace, characterized in that: A gasification and settling chamber which is narrow at the top and wide at the bottom is arranged on one side of the combustion furnace, a fire outlet is arranged at the top of the gasification and settling chamber, a gasification and settling hood which is narrow at the top and wide at the bottom is fixedly installed at the fire outlet in the gasification and settling chamber, a notch is arranged at the bottom of the side wall of the gasification and settling hood, a spiral guide plate is fixedly installed between the gasification and settling chamber and the gasification and settling hood, a fire pipe is connected between the combustion furnace and the gasification and settling chamber, an annular and hollow wind collecting disk is fixedly installed at the top of the gasification and settling chamber at the fire outlet, radially inclined wind collecting ports are evenly arranged circumferentially on the inner circular surface of the wind collecting disk, and the side wall of the wind collecting disk is connected to the fan through the first air duct.

2. The biomass particle pyrolysis semi-gasification furnace according to claim 1, characterized in that: A waste heat recovery box is arranged outside the gasification and settling chamber, the fan is fixedly mounted on the side wall of the waste heat recovery box, and the air inlet end of the first air duct is connected to the waste heat recovery box.

3. The biomass particle pyrolysis semi-gasification furnace according to claim 2, characterized in that: A second air duct is connected between the waste heat recovery box and the overfire pipe.

4. The biomass particle pyrolysis semi-gasification furnace according to claim 2, characterized in that: The third air duct is connected between the waste heat recovery box and the lower part of the combustion furnace.

5. The biomass particle pyrolysis semi-gasification furnace according to claim 2, characterized in that: A fourth air duct is connected between the waste heat recovery box and the gasification settling chamber.

6. The biomass particle pyrolysis semi-gasification furnace according to claim 2, characterized in that: A vertically upward air nozzle is installed at the bottom of the waste heat recovery box. The air nozzle extends upward to the fire outlet through the gasification and settling hood, and a fifth air duct is connected between the waste heat recovery box and the air nozzle.

7. The biomass particle pyrolysis semi-gasification furnace according to claim 2, characterized in that: A feeder is installed on the side wall of the combustion furnace, a hopper is installed on the output pipe of the feeder, and a sixth air duct is connected between the waste heat recovery box and the output pipe of the feeder.

8. The biomass particle pyrolysis semi-gasification furnace according to claim 1, characterized in that: A push plate is installed on the side wall of the combustion furnace below the output pipe of the feeder, a motor is fixedly installed on the side wall of the combustion furnace, and a crank rocker mechanism is connected between the output shaft of the motor and the push plate.

9. The biomass particle pyrolysis semi-gasification furnace according to claim 2, characterized in that: The seventh air duct is connected between the waste heat recovery box and the upper part of the combustion furnace.

10. The biomass particle pyrolysis semi-gasification furnace according to claim 2, characterized in that: An annular fire collecting plate is installed on the top of the air collecting plate, and an ash storage bin protruding to one side is provided at the bottom of the gasification settling chamber. The ash storage bin passes through the waste heat recovery box, and a ash cleaning door is installed at the end of the ash storage bin passing through the waste heat recovery box.

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