Gasification combustion furnace

Abstract

The present invention belongs to the field of combustion equipment, and specifically discloses a gasification combustion furnace, whose furnace core is movably installed inside an outer shell, and also includes a secondary air inlet gasification combustion-supporting hole opened on the furnace core, a secondary air inlet channel provided between the furnace core and the outer shell, a tertiary air inlet cyclone gasification burner and a return air exhaust channel, wherein the secondary air inlet channel is connected to the secondary air inlet gasification combustion-supporting hole; the tertiary air inlet cyclone gasification burner is provided at the upper end of the furnace core, and the return air exhaust channel is connected to the top of the furnace core. The present invention introduces the air for a second time through the secondary air inlet gasification combustion-supporting hole, and at the same time, the tertiary air inlet cyclone gasification burner provided at the upper end of the furnace core introduces tertiary air through the tertiary air inlet pipe, which increases the turbulence of the flame, smoke and air in the furnace core, fully mixes the combustible smoke and air, and makes the fuel fully burn in the furnace core, significantly reducing the emission of combustible smoke and combustible carbon particles generated by the fuel burned in the furnace core during the gasification combustion process.

Description

Technical Field

[0001] The present invention relates to the technical field of combustion equipment, in particular to a gasification combustion furnace. Background Art

[0002] At present, due to the shortage of fossil energy and rising energy prices, more and more biomass resources need to be developed and utilized. The furnace of existing biomass burning stoves usually has its air inlet located at the bottom and the air outlet located at the top, forming a strong combustion air duct flowing from bottom to top inside. In addition, the outlet of the furnace is usually a closed structure, resulting in some combustible flue gas and combustible carbon particles generated during the gasification and combustion of the biomass in the furnace having a short residence time in the furnace and incomplete combustion. They are easily carried out of the furnace as the hot air in the furnace is discharged upward, which is not conducive to energy saving and environmental protection. Summary of the Invention

[0003] The purpose of the present invention is to overcome the problems existing in the above-mentioned prior art and provide an energy-saving and environmentally friendly gasification combustion furnace, which can fully burn biomass fuel in the furnace and significantly reduce the emissions of combustible flue gas and combustible carbon particles generated by the burned biomass in the furnace during the gasification combustion process.

[0004] The technical solution of the present invention is: a gasification combustion furnace, comprising a furnace body, the furnace body comprising an outer shell and a furnace core arranged in the outer shell, the furnace core being a movable furnace core, and the furnace core being movably installed inside the outer shell, the gasification combustion furnace further comprising:

[0005] A plurality of secondary air inlet, gasification and combustion-supporting holes are arranged on the side wall of the furnace.

[0006] The secondary air inlet channel is provided between the furnace core and the outer shell and is communicated with the secondary air inlet gasification and combustion-supporting holes. The secondary air inlet channel provides secondary air for combustion-supporting into the furnace core through the secondary air inlet gasification and combustion-supporting holes.

[0007] The tertiary air inlet cyclone gasification burner is arranged at the upper end of the interior of the furnace, including an annular cavity, and a plurality of tertiary air inlet pipes with the same inclination direction as the annular cavity are arranged around the circumference of the annular cavity. The air inlet ends of the tertiary air inlet pipes are respectively fixed to the inner wall of the furnace and are connected to the secondary air inlet gasification combustion-aiding holes at the air inlet ends. A plurality of tertiary air inlet cyclone gasification combustion-aiding holes are also arranged along the circumference of the inner side wall of the annular cavity; the tertiary air inlet cyclone gasification burner can make the combustion effect better and be more energy-saving and environmentally friendly. Since the tertiary air inlet cyclone gasification burner is arranged at the upper end of the interior of the furnace at the same time, the combustible components passing through the upper end of the interior of the furnace can be better fully burned by introducing the tertiary air. Under the joint action of the secondary air inlet and the tertiary air inlet, the effect of full combustion of the combustible components in the furnace can be achieved.

[0008] The return air and smoke exhaust channel is arranged between the furnace core and the outer shell and is communicated with the top of the furnace core.

[0009] The secondary air inlet gasification and combustion-supporting holes are arranged on the side wall of the upper part of the furnace or on the side wall of the entire furnace, and the secondary air inlet is introduced into the furnace through the side wall of the furnace.

[0010] The outer wall of the upper part of the above-mentioned furnace is provided with a plurality of secondary air inlet guide baffles with the same inclination direction along its circumference. The positional relationship between the secondary air inlet gasification combustion-aiding holes on the side wall of the upper part of the furnace and the secondary air inlet guide baffles is as follows: a plurality of secondary air inlet gasification combustion-aiding holes are provided between two adjacent secondary air inlet guide baffles, wherein the plurality of secondary air inlet gasification combustion-aiding holes are provided along the longitudinal direction of the secondary air inlet guide baffles; the inclination direction of each secondary air inlet guide baffle is opposite to the inclination direction of the tertiary air inlet pipe of the tertiary air inlet cyclone gasification burner, so that the swirl direction of the combustion-aiding air blown out from the tertiary air inlet cyclone gasification combustion-aiding holes in the hollow space in the middle of the annular cavity is opposite to the swirl direction of the combustible flue gas whose swirl force has been weakened entering the hollow space in the middle of the annular cavity from the core combustion area of ​​the furnace, thereby forming better turbulence of the flue gas and air in the hollow space in the middle of the annular cavity, achieving a more complete combustion effect.

[0011] A flame guide plate is provided on the top of the above-mentioned furnace core, and the flame guide plate includes a plurality of fire rotating blades and a plurality of heat conducting columns respectively arranged along the circumference of the top of the furnace core, the plurality of fire rotating blades are located on the inner side of the plurality of heat conducting columns, and each fire rotating blade is arranged in a clockwise or counterclockwise oblique direction. The fire rotating blades can make the flame burn in a rotating manner and can make the combustible components in the fireworks burn fully, while the heat conducting columns can effectively gather heat and store energy to improve the heat utilization rate; a movable furnace cover is provided on the furnace mouth at the top of the outer shell of the furnace body, and the area between the flame guide plate and the movable furnace cover forms a combustion chamber; the return air and smoke exhaust channel is connected to the top of the furnace core through the gaps between the fire rotating blades and the gaps between the heat conducting columns.

[0012] A secondary air duct cover is provided on the outside of the above-mentioned furnace core, which divides the space between the outer shell of the furnace body and the furnace core into a return air and smoke exhaust channel and a secondary air inlet channel, wherein the return air and smoke exhaust channel is located on the outer shell side of the furnace body, and the secondary air inlet channel is located on the furnace core side.

[0013] The secondary air inlet channel is connected to a secondary air inlet control switch, and the secondary air inlet control switch is arranged on the furnace body.

[0014] The side wall of the furnace body is also provided with a fuel filling port extending from the furnace body shell into the furnace core; a secondary air inlet diverter plate is provided on the outer wall of the furnace core above the connection between the fuel filling port and the furnace core.

[0015] A plurality of metal heat collecting grids arranged vertically, horizontally or obliquely on the inner wall or outer wall of the furnace shell are provided along the circumference of the furnace shell.

[0016] The above-mentioned furnace core includes a movable lower furnace bridge arranged at the bottom thereof, and an ash hopper is provided under the lower furnace bridge. The ash hopper is used to collect the ash after combustion and to adjust the position of the ash hopper so that the primary air intake enters the furnace core from the bottom of the lower furnace bridge; a movable upper furnace bridge for easy removal and placement is also provided above the lower furnace bridge, and a furnace bridge door is provided at the front or back of the lower part of the furnace body.

[0017] The furnace core is movably installed in the outer shell of the furnace body and is detachably connected to the outer shell. The furnace core can be taken out and put in through the furnace opening on the top of the outer shell of the furnace body.

[0018] Beneficial effects of the present invention: The present invention provides a gasification combustion furnace having the following technical advantages:

[0019] The present invention is provided with obliquely consistent secondary air inlet gasification combustion-supporting holes on the upper part of the furnace, and obliquely consistent tertiary air inlet pipes and tertiary air inlet cyclone gasification combustion-supporting holes are provided on the tertiary air inlet cyclone gasification burner; the secondary introduction of the air through the secondary air inlet gasification combustion-supporting holes increases the turbulence of the flame and the smoke and air in the furnace, so that the combustible smoke and air are fully mixed, and the residence time of the combustible smoke in combustion and the combustible components such as carbon particles in the smoke on the furnace body is prolonged, which is beneficial to heat exchange, prolongs the combustion time, strengthens the combustion process, and makes it There is enough burning time, which promotes the full combustion of the combustible components in the fuel; at the same time, the three-air inlet cyclone gasification burner provided at the upper end of the interior of the furnace introduces three-air inlet through the three-air inlet pipe, and the combustible components that have not been completely burned through the upper end of the interior of the furnace pass through the middle space of the annular cavity of the three-air inlet cyclone gasification burner. Under the action of the combustion-supporting air ejected from each three-air inlet cyclone gasification combustion-supporting hole, a rotating combustion flame is formed, which can fully burn the combustible components that have passed through the upper end of the interior of the furnace, save fuel, and benefit the environment. The flame burning in the furnace of the present invention is rotating combustion, and the cold furnace is easy to ignite, ignites quickly, and burns more completely. When the present invention is used, it can be burned by natural air intake, or forced by a blower to provide air for combustion.

[0020] The U-shaped flue gas channel prolongs the residence time of the flue gas in the furnace body, improves the heat radiation effect in the furnace body, reduces the heat loss due to excessive heat dissipation and exhaust temperature, and the fuel can be fully gasified and burned.

[0021] The stove provided by the present invention is more energy-saving and environmentally friendly, effectively improves the utilization rate of energy, and is easy to use. Since the furnace core and the furnace bridge are detachably arranged in the furnace body, such easily burned parts are easy to repair and replace. It is universal for the existing fuels used, which is conducive to promotion and popularization. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a basic structural diagram of the present invention;

[0023] Figure 2 For the present invention Figure 1 A schematic diagram of the drilling structure on the entire furnace body;

[0024] Figure 3 For the present invention Figure 1 A schematic diagram of the structure of a secondary air inlet diverter plate provided on the upper part of the furnace;

[0025] Figure 4 For the present invention Figure 1 A diagram showing a secondary air inlet diverter plate and full-body drilling structure on the upper part of the furnace;

[0026] Figure 5 For the present invention Figure 1 A is a schematic diagram of the structure of a three-stage air inlet cyclone gasification burner on the upper part of the furnace;

[0027] Figure 6 For the present invention Figure 1 A-direction extended furnace body; schematic diagram of telescopic movable flue structure;

[0028] Figure 7 For the present invention Figure 1 Schematic diagram of the movable triangular flue structure of the extended furnace body in direction A;

[0029] Figure 8 For the present invention Figure 2 、 Figure 3 、 Figure 4 as well as Figure 5 Schematic diagram of the structure where no return air exhaust duct is provided on the side of the refueling port;

[0030] Figure 9 For the present invention Figure 6 as well as Figure 7 Schematic diagram of the structure where no return air exhaust duct is provided on the side of the refueling port;

[0031] Figure 10 This is a schematic diagram of the heat-insulating movable furnace structure of the present invention;

[0032] Figure 11 The thermos-shaped movable furnace of the present invention Figure 10 A schematic diagram of the structure of the A direction;

[0033] Figure 12 The thermos-shaped movable furnace of the present invention Figure 10 Schematic diagram of the A-direction extended furnace structure;

[0034] Figure 13 This is a schematic top view of the flame deflector structure of the present invention;

[0035] Figure 14 This is a schematic three-dimensional diagram of the flame guide plate structure of the present invention;

[0036] Figure 15 This is a top view schematic diagram of a structure in which a plurality of circular holes are provided on the flame deflector plate of the present invention;

[0037] Figure 16 This is a three-dimensional schematic diagram of a structure in which a plurality of circular holes are provided on the flame guide plate of the present invention;

[0038] Figure 17 This is a schematic structural diagram of the three-air inlet cyclonic fire gasification burner of the present invention;

[0039] Figure 18 This is a schematic diagram of the structure of the movable fire cover of the present invention.

[0040] Explanation of the reference numerals: 1. furnace body; 2. furnace core; 3. secondary air inlet gasification combustion hole; 4. secondary air duct cover; 5. fire swirl blade; 6. heat conducting column; 7. secondary air inlet diverter plate; 8. combustion chamber; 9. base; 10. ash hopper; 11. lower furnace bridge; 12. secondary air inlet control switch; 13. secondary air inlet duct; 14. return air and smoke exhaust duct; 15. movable furnace cover; 16. screw hole for connecting panel; 17. fuel filling 18. Heat collecting grid; 19. Flue; 20. Oven; 21. Upper smoke exhaust port; 22. Lower smoke exhaust port; 23. Smoke transfer switch; 24. Ash cleaning door; 25. Furnace bridge door; 26. Smoke exhaust outlet; 27. Secondary air inlet guide baffle; 28. Upper furnace bridge; 29. ​​Tertiary air inlet cyclone gasification burner; 30. Tertiary air inlet pipe; 31. Tertiary air inlet cyclone gasification combustion-supporting hole; 32. Movable fire cover; 33. Anti-scalding cover. DETAILED DESCRIPTION

[0041] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0042] Example:

[0043] See also Figure 1 、 Figure 2 and Figure 5 As shown, the gasification combustion furnace provided in this embodiment includes a furnace body 1, with an anti-scalding cover 33 provided on the outer periphery of the furnace body 1. The furnace body 1 includes an outer shell and a furnace 2 disposed within the outer shell. The furnace 2 is a movable furnace 2, that is, the furnace 2 is movably mounted within the outer shell. The furnace 2 is shaped like a thermos bottle, a cone, a cylinder, a column, a cube, or a rectangular parallelepiped. A movable fire cover 32 is provided on the top of the furnace 2 to adjust the size of the smoke exhaust (the movable fire cover 32 is shown in FIG. 1 ). Figure 18As shown), the gasification combustion furnace also includes: a number of secondary air inlet gasification combustion holes 3, a secondary air inlet channel 13, a tertiary air inlet cyclone gasification burner 29 and a return air and smoke exhaust channel 14, wherein the bottom of the furnace 2 is provided with a usual furnace 2 air inlet as a primary air inlet, and the secondary air inlet gasification combustion hole 3 is opened on the side wall of the furnace 2; the secondary air inlet channel 13 is provided between the furnace 2 and the outer shell, and the lower end of the secondary air inlet channel 13 is connected with the outside world from the lower end of the furnace body 1 to realize secondary air intake, and the secondary air inlet channel 13 is connected with the secondary air inlet gasification combustion hole 3, and the secondary air inlet channel 13 provides secondary air for combustion into the furnace 2 through the secondary air inlet gasification combustion hole 3, wherein the secondary air inlet gasification combustion hole 3 is a circular hole, a strip hole, an elliptical hole, a triangular hole, a trapezoidal or square hole, and the secondary air inlet gasification combustion hole 3 is a hole set in a straight direction or a hole set in an oblique direction. The three-stage air inlet cyclone gasification burner 29 is arranged at the upper end of the furnace 2. Figure 9 As shown, the tertiary air inlet cyclone gasification burner 29 includes an annular cavity, and the burning gas in the furnace 2 passes through the hollow space in the middle of the annular cavity when it rises. A plurality of tertiary air inlet pipes 30 with the same inclination direction connected to the annular cavity are arranged around the circumference of the annular cavity (that is, each tertiary air inlet pipe 30 has the same angle with the outer wall of the annular cavity and the same inclination), wherein the number of tertiary air inlet pipes 30 can be set to 3-6, and the air inlet end of each tertiary air inlet pipe 30 is respectively fixed to the inner wall of the furnace 2 and is connected to the secondary air inlet gasification combustion-aiding hole 3 at the air inlet end, and a plurality of tertiary air inlet cyclone gasification combustion-aiding holes 31 are also provided along the circumference of the inner side wall of the annular cavity, wherein the tertiary air inlet cyclone gasification combustion-aiding holes 31 are set as circular holes or vertical strip holes with the same inclination direction. Since the inclination of each tertiary air inlet pipe 30 is consistent, the combustion-aiding air blown out from the tertiary air inlet cyclone gasification combustion-aiding holes 31 will be in a swirling shape in the hollow space in the middle of the annular cavity. The return air and smoke exhaust channel 14 is provided between the furnace 2 and the outer shell, and is communicated with the top of the furnace 2 .

[0044] The three-air inlet cyclone gasification burner 29 of this embodiment can make the combustion effect better, more energy-saving and environmentally friendly. One end of the three-air inlet pipe 30 is connected to the secondary air inlet channel 13 through the wall of the furnace 2, and the other end is connected to the annular cavity of the three-air inlet cyclone gasification burner 29, and the three-air inlet cyclone gasification combustion-aiding holes 31 are ejected to participate in the gasification combustion. Since the three-air inlet cyclone gasification burner 29 is set at the upper end of the interior of the furnace 2 at the same time, the three-air inlet is introduced through the three-air inlet pipe 30. The combustible components that have not been burned through the upper end of the interior of the furnace 2 form a rotating combustion flame under the action of the combustion-aiding air ejected from the three-air inlet cyclone gasification combustion-aiding holes 31 when passing through the middle space of the annular cavity of the three-air inlet cyclone gasification burner 29, which can fully burn the combustible components passing through the upper end of the interior of the furnace 2, with strong firepower, fuel saving, and environmental protection. The gasification combustion furnace provided by this embodiment can achieve the effect of full combustion of the combustible components in the furnace 2 under the joint action of the primary air inlet, the secondary air inlet and the tertiary air inlet.

[0045] The furnace bladder 2 of this embodiment is designed to be movable, so that the furnace bladder 2 can be easily taken out from the furnace body 1, thereby facilitating the cleaning of the furnace bladder 2 and the interior of the furnace body 1, and in particular, the secondary air inlet gasification and combustion-supporting holes 3 on the furnace bladder 2 can be easily cleaned to avoid being blocked by combustion residues. At the same time, since the furnace bladder 2 is designed to be movable, the secondary air inlet channel 13 between the furnace bladder 2 and the inner wall of the furnace body 1 can be easily cleaned after the furnace bladder 2 is taken out, thereby avoiding the problem of combustion residues falling from the secondary air inlet gasification and combustion-supporting holes 3 on the furnace bladder 2 into the secondary air inlet channel 13 due to long-term use, causing poor airflow in the furnace.

[0046] In some embodiments, see Figure 4 and Figure 5 A flue 19 is provided on one side of the furnace body 1. The flue 19 is connected to one side of the return air and smoke exhaust channel 14. An oven 20 is provided on the flue 19. The oven 20 divides the flue 19 into a U-shaped smoke channel in the upper and lower directions and in the front and back directions. The return air and smoke exhaust channel 14 is provided with an upper smoke exhaust port 21 and a lower smoke exhaust port 22 connected to the flue 19. A smoke conversion switch 23 is provided at the smoke channel of the upper smoke exhaust port 21. The smoke conversion switch 23 can control the direction of the smoke in the return air and smoke exhaust channel 14. The flue 19 is arranged to be movable and can be taken and installed at will. A dust cleaning door 24 and a smoke exhaust outlet 26 are provided on the flue 19. When in use, a suitable matching flue 19 can be selected according to needs. A plurality of metal heat collecting grilles 18 arranged vertically, horizontally or obliquely on the inner or outer wall of the shell are also provided along the circumference of the furnace body 1 shell (see Figure 1 As shown in the figure, the return air exhaust channel 14 and the heat collecting grid 18 can fully absorb and dissipate the heat in the flue gas during the downward process of the high-temperature flue gas.

[0047] In other embodiments, see Figure 6 As shown, compared with the above embodiment (see Figure 5) The difference is that an oven 20 is provided within the furnace body 1. The oven 20 divides the smoke passage of the return air exhaust duct 14 on one side of the furnace body 1 into a U-shaped smoke passage in the upper and lower directions and in the front and back directions. The oven 20 is provided with corresponding upper and lower smoke outlets 21 and 22. A smoke switch 23 is provided in the smoke passage of the upper smoke outlet 21. The smoke switch 23 can control the direction of the smoke. The flue 19 is configured as a movable, telescopic and diverting type (composed of multiple sections of metal exhaust pipes with decreasing diameters that are connected together in a telescopic sleeve). The length of the flue 19 can be adjusted at will. The flue 19 can be rotated 360 degrees to adjust the direction of the exhaust outlet 26 at its end, allowing for free installation and removal. The U-shaped smoke passage of this embodiment prolongs the residence time of the smoke in the furnace body 1, improves the heat radiation effect within the furnace body 1, and reduces heat loss due to excessive heat dissipation and exhaust temperature.

[0048] See also Figure 6 In this embodiment, the furnace 2 is drilled with secondary air inlet gasification and combustion-supporting holes 3 throughout the body. The furnace 2 is not provided with a secondary air inlet diverter plate 7, and a ash cleaning door 24 is provided at the bottom of the furnace body 1.

[0049] In other embodiments, see Figure 7 As shown, an oven 20 is provided in the furnace body 1 . The difference from the above embodiment is that an oblique-angle flue 19 is provided on the side of the furnace body 1 , and a smoke exhaust outlet 26 is provided on the flue 19 .

[0050] Furthermore, the secondary air inlet gasification combustion-supporting hole 3 is provided on the side wall of the upper portion of the furnace 2 or on the side wall of the entire furnace 2. Figure 1 Only the secondary air inlet, gasification and combustion-supporting hole 3 is drilled on the upper part of the furnace 2. Figure 2 Secondary air inlet, gasification, and combustion-supporting holes 3 are drilled throughout the furnace 2. For fuels with low smoke content, a furnace 2 with secondary air inlet, gasification, and combustion-supporting holes 3 drilled only in the upper portion of the furnace 2 is selected. For fuels with high smoke content, a furnace 2 with secondary air inlet, gasification, and combustion-supporting holes 3 drilled throughout the furnace 2 is selected. Therefore, depending on the type of fuel containing smoke, one of the two furnace 2 configurations with secondary air inlet, gasification, and combustion-supporting holes 3 can be selected to achieve a reasonable supply of combustion-supporting air and sufficient combustion.

[0051] In some embodiments, see Figure 3 and Figure 4The outer wall of the upper part of the furnace 2 is also provided with a plurality of secondary air inlet guide baffles 27 with the same inclination direction along its circumference. The positional relationship between the secondary air inlet gasification and combustion-supporting holes 3 on the side wall of the upper part of the furnace 2 and the secondary air inlet guide baffles 27 is as follows: a plurality of secondary air inlet gasification and combustion-supporting holes 3 are provided between two adjacent secondary air inlet guide baffles 27, wherein the plurality of secondary air inlet gasification and combustion-supporting holes 3 are provided along the longitudinal direction of the secondary air inlet guide baffles 27; each secondary air inlet guide baffle 27 is provided with the same inclination direction, so that the air from each adjacent two secondary air inlets is The airflow from the secondary air inlet gasification and combustion-supporting holes 3 between the guide baffles 27 is directed in the same direction by the two adjacent secondary air inlet guide baffles 27. However, the airflow direction between each group of adjacent secondary air inlet guide baffles 27 gradually changes, causing the secondary air in the furnace 2 to assume a certain swirl state. The combined effects of the swirling secondary air, the primary air in the furnace 2, and the combustion gases increase the turbulence of the flame, flue gas, and air in the core combustion zone of the furnace 2, allowing the combustible flue gas and air to be fully mixed and burned. In addition, because the secondary air inlet guide baffles 27 are connected to the outer wall of the furnace 2 and have a relatively high temperature, they can also quickly preheat the secondary air entering from the upper sidewall of the furnace 2, resulting in a relatively high temperature for the secondary air entering the furnace 2, thereby significantly improving the gasification and combustion effect. In this embodiment, the inclination direction of each secondary air inlet guide baffle 27 can be set to a state opposite to the oblique direction of the tertiary air inlet pipe 30 of the tertiary air inlet cyclone gasification burner 29, so that the swirl direction formed by the combustion-supporting air blown out from the tertiary air inlet cyclone gasification combustion-supporting hole 31 in the middle hollow space of the annular cavity is opposite to the swirl direction of the combustible flue gas with weakened swirl force entering the middle hollow space of the annular cavity from the core combustion zone of the furnace 2, thereby forming better turbulence of the flue gas and air in the middle hollow space of the annular cavity, thereby achieving a more complete combustion effect.

[0052] like Figure 3 As shown, a secondary air inlet, gasification and combustion-supporting hole 3 is drilled on the upper part of the furnace 2. Figure 4 As shown, secondary air inlet gasification and combustion-supporting holes 3 are drilled all over the furnace 2. In this embodiment, secondary air inlet guide baffles 27 are provided vertically between the secondary air inlet gasification and combustion-supporting holes 3 on the upper part of the furnace 2. The secondary air inlet guide baffles 27 are arranged in a uniform oblique direction. The secondary air inlet guide baffles 27 enable the stove to effectively absorb heat during combustion and quickly heat the secondary air, thereby greatly improving the gasification and combustion effect.

[0053] In some embodiments, a flame deflector is provided on the top of the furnace 2, and the flame deflector comprises a plurality of fire-spinning blades 5 and a plurality of heat-conducting columns 6 respectively arranged along the circumference of the top of the furnace 2. The plurality of fire-spinning blades 5 are located on the inner side of the plurality of heat-conducting columns 6, and each fire-spinning blade 5 is arranged in a clockwise or counterclockwise direction (see Figure 8As shown), the swirl blades 5 of this embodiment can make the flame burn in a rotating manner, and can fully burn the combustible components in the fireworks. The heat-conducting columns 6 can effectively gather heat and store energy to improve heat utilization. A movable furnace cover 15 and screw holes 16 for connecting the panel are provided on the furnace mouth at the top of the outer shell of the furnace body 1; the area between the flame guide plate and the movable furnace cover 15 forms a combustion chamber 8, that is, a combustion chamber 8 is formed between the swirl blades 5, the heat-conducting columns 6 and the movable furnace cover 15; the return air and smoke exhaust channel 14 is connected to the top of the furnace 2 through the gaps between the swirl blades 5 and the gaps between the heat-conducting columns 6.

[0054] In some embodiments, a secondary air duct cover 4 is provided on the outside of the furnace core 2, and the secondary air duct cover 4 divides the space between the outer shell of the furnace body 1 and the furnace core 2 into a return air and smoke exhaust channel 14 and a secondary air inlet channel 13, wherein the return air and smoke exhaust channel 14 is located on the outer shell side of the furnace body 1, and the secondary air inlet channel 13 is located on the side of the furnace core 2.

[0055] Furthermore, the secondary air inlet channel 13 is connected to a secondary air inlet control switch 12 , and the secondary air inlet control switch 12 is provided on the furnace body 1 .

[0056] In some embodiments, see Figure 2 As shown, the furnace 2 includes a movable lower furnace bridge 11 provided at the bottom thereof. The lower furnace bridge 11 is a push-pull or swing-back type furnace bridge that is easy to replace. An ash hopper 10 and a base 9 are provided below the lower furnace bridge 11. The lower furnace bridge 11 is connected to a handle, which is located outside the furnace body 1. The ash hopper 10 is used to collect the ash after combustion and adjust the position of the ash hopper 10 so that the primary air intake enters the furnace 2 from the bottom of the lower furnace bridge 11. By pulling the handle, the lower furnace bridge 11 can be driven to move, thereby cleaning the ash in the furnace 2 and causing it to fall into the ash hopper 10. A furnace bridge door 25 for removing the furnace bridge is provided at the front or rear of the lower part of the furnace body 1. Specifically, the furnace bridge door 25 can be provided behind the ash hopper 10, so that removing the furnace bridge is convenient and quick.

[0057] In some embodiments, the side wall of the furnace body 1 is further provided with a fuel filling port 17 extending from the outer shell of the furnace body 1 to the furnace core 2. One end of the fuel filling port 17 is located outside the furnace body 1 and the other end is connected to the furnace core 2. The fuel filling port 17 is set to be low inside and high outside, and the inside is tilted downward to facilitate the fuel to fall smoothly onto the furnace bridge when solid fuel is added; a secondary air inlet diverter plate 7 is provided on the outer wall of the furnace core 2 above the connection between the fuel filling port 17 and the furnace core 2. Since the fuel filling port 17 is provided between the outer shell of the furnace body 1 and the furnace core 2, the furnace body 1 is located on the side of the fuel filling port 17 to block the secondary air inlet channel 13, affecting the uniformity of the secondary air above the fuel filling port 17, resulting in the phenomenon of eccentric combustion. Therefore, the secondary air inlet diverter plate 7 can make the secondary air evenly enter the secondary air inlet gasification and combustion-aiding hole 3 above the furnace core 2 for gasification and full combustion, and the phenomenon of eccentric combustion will not occur, effectively solving the problem of eccentric combustion, thereby achieving the effect of stable flame of gasification combustion, no eccentricity and full gasification combustion. A movable upper furnace bridge 28 (see FIG. Figure 7 ), the furnace bridge 28 can be taken out and installed at will from the fuel filling port 17 according to the needs of use.

[0058] See also Figure 8 、 Figure 9 As shown, this embodiment provides a gasification combustion furnace and Figure 2-Figure 7 The difference between the embodiments is that, in order to simplify the process and facilitate manufacturing, no return air and smoke exhaust channel 14 is provided on one side of the refueling port 17, so as to facilitate production and processing.

[0059] join Figure 10 、 Figure 11 、 Figure 12 As shown, this embodiment provides a gasification combustion furnace, and further optimizes the design and production process; the furnace core 2 is designed to be in the shape of a thermos bottle to more perfectly reflect the combustion effect, and to make the production process more convenient; a return air and smoke exhaust channel 14 is provided on the periphery of the furnace core 2, and the furnace core 2 is movable for easy removal and installation.

[0060] In some embodiments, the furnace bladder 2 is movably installed in the outer shell of the furnace body 1, that is, the furnace bladder 2 and the outer shell are detachably connected. Specifically, a clamping ring for fixing the furnace bladder 2 is provided inside the furnace body 1 and outside the furnace bladder 2. The bottom of the movable furnace bladder 2 is placed in the clamping ring for fixation to achieve a detachable connection, and the furnace bladder 2 can be taken out and put in through the furnace opening at the top of the outer shell of the furnace body 1.

[0061] The working principle of the gasification combustion furnace disclosed in the present invention is as follows:

[0062] When using solid fuel, open the movable furnace cover 15, load the fuel into the furnace 2 to the bottom of the first row of secondary air inlet gasification and combustion-supporting holes 3 on the upper part of the furnace 2, open the ash hopper 10 to allow the primary air to enter the furnace 2 from the bottom of the furnace bridge, ignite the fuel from the top of the fuel, and the fuel undergoes pyrolysis and gasification reaction in the furnace 2 to produce combustible gas. The secondary air enters the secondary air inlet channel 13 from the secondary air inlet control switch 12, and then enters from the secondary air inlet gasification and combustion-supporting holes 3. When the combustible gas rises to the secondary air inlet gasification and combustion-supporting holes 3, the combustible gas obtained from the secondary air supply is gasified and fully burned in the combustion chamber 8. In a gasification furnace equipped with a tertiary air inlet cyclone gasification burner 29 in the upper portion of the furnace 2, the tertiary air flows sequentially through the secondary air inlet channel 13 and the secondary air inlet gasification-supporting hole 3 connected to the air inlet end of the tertiary air inlet pipe 30. The tertiary air then enters the tertiary air inlet cyclone gasification burner 29 from the tertiary air inlet pipe 30, and finally, a rotating flame is ejected from the tertiary air inlet cyclone gasification-supporting hole 31 for gasification combustion. In a gasification furnace equipped with only the secondary air inlet gasification-supporting holes 3 in the upper portion of the furnace 2, the firepower is controlled by adjusting the primary airflow volume by the size of the gap in the ash hopper 10. During the combustion process, fuel can be added to the furnace 2 through the fuel inlet 17 or the movable furnace cover 15. When the cold furnace ignition chimney has not yet generated suction, the flue gas switch 23 is opened, and the flue gas is discharged from the upper exhaust port 21 through the chimney installed at the exhaust outlet 26. After the chimney is heated by the flue gas for more than ten minutes to form suction, the flue gas conversion switch 23 can be closed to allow the flue gas to be discharged from the return air exhaust channel 14 through the lower exhaust port 22, through the rear side of the oven 20, and finally from the chimney installed on the exhaust outlet 26 on the flue 19.

[0063] When sealing the fire, add some fuel to the furnace 2, cover the top of the furnace 2 with the movable fire sealing cover 32, and adjust the size of the smoke exhaust hole according to the smoke concentration required by the fuel in the furnace 2 when sealing the fire through the movable fire sealing cover 32 adjustment plate to exhaust the smoke. Close the ash hopper 10 to control the primary air intake. Leave a small gap in the ash hopper 10 to allow air to enter the furnace 2 so that the fire will not go out and the fire can be sealed. When the fire is needed, take out the movable fire sealing cover 32 and slightly open the ash hopper 10 to allow air to enter the furnace 2. The flame will immediately ignite and the fire can be used. The burned ash will fall into the ash hopper 10 by pulling the lower furnace bridge 11.

[0064] The gasification combustion furnace has secondary air inlet, gasification, and combustion-supporting holes 3 formed throughout the furnace 2. During use, fuel is loaded into the furnace 2 to below the first row of secondary air inlet, gasification, and combustion-supporting holes 3 in the upper portion of the furnace 2. The ash hopper 10 is opened to allow primary air to enter the furnace 2 from the bottom of the furnace bridge. The fuel is ignited from the top, and the secondary air inlet control switch 12 is fully opened. Once the fire is ignited, the ash hopper 10 and the primary air inlet are closed. The required firepower is controlled by adjusting the aperture size of the secondary air inlet control switch 12 (the flue gas switch 23 is operated in the same manner as above). The flue gas produced after sufficient gasification and combustion is discharged through the exhaust outlet 26 on the flue 19. When sealing the fire, add some fuel to the furnace 2 and place the movable fire cover 32 over the furnace 2. Different types of fuel in the furnace 2 generate different smoke concentrations when burned. When sealing the fire, adjust the size of the smoke exhaust hole through the adjustment plate on the fire cover 32 according to the smoke concentration generated during combustion to exhaust and seal the fire. Close the ash hopper 10 and the primary air inlet, then close the secondary air inlet control switch 12, leaving a small gap for air to enter to keep the fire in the furnace 2 from extinguishing. To seal the fire, remove the movable furnace cover 15, open the secondary air inlet control switch 12, and the flame will quickly ignite, and the fire can be used. The primary, secondary, and tertiary air inlets of the present invention can be naturally supplied or forced by a blower.

[0065] The above description is a specific embodiment of the present invention and does not limit the concept and scope of the present invention. Various changes to its technical solution without departing from the design concept of the present invention are within the scope of protection of the present invention.

Claims

1. A gasification combustion furnace, comprising a furnace body, wherein the furnace body comprises an outer shell and a furnace core arranged in the outer shell, characterized in that: The furnace core is a movable furnace core, which is movably installed inside the shell. The gasification combustion furnace also includes: A plurality of secondary air inlet, gasification and combustion-supporting holes are provided on the side wall of the furnace; A secondary air inlet channel is provided between the furnace core and the shell, and is connected to the secondary air inlet gasification and combustion-supporting hole. The secondary air inlet channel provides secondary air for combustion-supporting into the furnace core through the secondary air inlet gasification and combustion-supporting hole. A tertiary air inlet cyclone gasification burner is provided at the upper end of the interior of the furnace, comprising an annular cavity, with a plurality of tertiary air inlet pipes arranged around the circumference of the annular cavity and connected to the annular cavity in the same inclination direction, the air inlet end of each tertiary air inlet pipe being fixed to the inner wall of the furnace and connected to the secondary air inlet gasification combustion-supporting hole at the air inlet end, and a plurality of tertiary air inlet cyclone gasification combustion-supporting holes being further provided along the circumference of the inner side wall of the annular cavity; and A return air and smoke exhaust channel is provided between the furnace core and the outer shell and is communicated with the top of the furnace core; The secondary air inlet gasification and combustion-aiding holes are arranged on the side wall of the upper part of the furnace or on the side wall of the entire furnace; a plurality of secondary air inlet guide baffles with the same inclination direction are provided on the outer wall of the upper part of the furnace along its circumference, and the positional relationship between the secondary air inlet gasification and combustion-aiding holes on the side wall of the upper part of the furnace and the secondary air inlet guide baffles is as follows: a plurality of secondary air inlet gasification and combustion-aiding holes are arranged between two adjacent secondary air inlet guide baffles, wherein the plurality of secondary air inlet gasification and combustion-aiding holes are arranged along the longitudinal direction of the secondary air inlet guide baffles; the inclination direction of each secondary air inlet guide baffle is opposite to the inclination direction of the tertiary air inlet pipe of the tertiary air inlet cyclone gasification burner, so that the swirl direction of the combustion-aiding air blown out from the tertiary air inlet cyclone gasification and combustion-aiding holes in the hollow space in the middle of the annular cavity is opposite to the swirl direction of the combustible flue gas whose swirl force has been weakened entering the hollow space in the middle of the annular cavity from the core combustion area of ​​the furnace, thereby forming better turbulence of the flue gas and air in the hollow space in the middle of the annular cavity.

2. The gasification combustion furnace according to claim 1, characterized in that: A flame deflector is provided on the top of the furnace, and the flame deflector includes a plurality of fire-spinning blades and a plurality of heat-conducting columns respectively arranged along the circumference of the top of the furnace, the plurality of fire-spinning blades are located on the inner sides of the plurality of heat-conducting columns, and the fire-spinning blades are uniformly arranged in a clockwise or counterclockwise direction; a movable furnace cover is provided on the furnace opening at the top of the outer shell of the furnace body, and the area between the flame deflector and the movable furnace cover forms a combustion chamber; The return air and smoke exhaust channel is communicated with the top of the furnace through the gaps between the fire rotating blades and the gaps between the heat conducting columns.

3. The gasification combustion furnace according to claim 1, characterized in that: A secondary air duct cover is provided on the outside of the furnace core, which divides the space between the outer shell of the furnace body and the furnace core into a return air and smoke exhaust channel and a secondary air inlet channel, wherein the return air and smoke exhaust channel is located on the outer shell side of the furnace body, and the secondary air inlet channel is located on the furnace core side.

4. The gasification combustion furnace according to claim 3, characterized in that: The secondary air inlet channel is connected to a secondary air inlet control switch, and the secondary air inlet control switch is arranged on the furnace body.

5. The gasification combustion furnace according to claim 4, characterized in that: The side wall of the furnace body is further provided with a fuel filling port extending from the furnace body shell into the furnace core; a secondary air inlet diverter plate is provided on the outer wall of the furnace core above the connection between the fuel filling port and the furnace core.

6. The gasification combustion furnace according to claim 1, characterized in that: A plurality of metal heat collecting grids arranged vertically, horizontally or obliquely on the inner wall or outer wall of the furnace shell are provided along the circumference of the furnace shell.

7. The gasification combustion furnace according to claim 1 or 5, characterized in that: The furnace core includes a movable lower furnace bridge arranged at the bottom thereof, and an ash hopper is provided below the lower furnace bridge. The ash hopper is used to collect the ash after combustion and to adjust the position of the ash hopper so that the primary air enters the furnace core from the bottom of the lower furnace bridge; a movable upper furnace bridge for easy removal and placement is also provided above the lower furnace bridge, and a furnace bridge door is provided at the front or rear of the lower part of the furnace body.

8. The gasification combustion furnace according to claim 1 or 2, characterized in that: The furnace core is movably installed in the outer shell of the furnace body and is detachably connected to the outer shell. The furnace core is taken out and put in through the furnace opening on the top of the outer shell of the furnace body.

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