Gasification combustion furnace

Abstract

The invention belongs to the field of combustion equipment, and particularly discloses a gasification combustion furnace which is characterized in that a furnace pipe of the gasification combustion furnace is movably mounted in a shell, and the gasification combustion furnace further comprises a secondary air inlet gasification combustion-supporting hole formed in the furnace pipe, a secondary air inlet channel arranged between the furnace pipe and the shell, a tertiary air inlet rotary fire gasification combustor and an air return smoke exhaust channel; the secondary air inlet channel is communicated with the secondary air inlet gasification combustion-supporting hole; the tertiary air inlet rotary fire gasification combustor is arranged at the upper end in the furnace pipe, and the air return smoke exhaust channel is communicated with the top of the furnace pipe. Inlet air is secondarily introduced through the secondary air inlet gasification combustion-supporting holes, meanwhile, tertiary inlet air is introduced into the tertiary air inlet rotary fire gasification combustor arranged at the upper end of the interior of the furnace pipe through the tertiary air inlet pipe, turbulent fluctuation of flames and smoke in the furnace pipe and air is increased, combustible smoke and air are fully mixed, and the combustion efficiency is improved. Therefore, the fuel is fully combusted in the furnace pipe, and the discharge amount of combustible smoke and combustible carbon particles generated in the gasification combustion process of the combusted fuel in the furnace pipe is remarkably reduced.

Description

Technical Field

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

[0002] At present, due to the shortage of petrochemical energy and the rising energy prices, more and more biomass resources need to be developed and utilized. The furnace liners of existing biomass combustion stoves usually have air inlets at the bottom and air outlets at the upper part, forming a strong combustion air duct flowing from bottom to top inside. Coupled with the fact that the outlet of the furnace liner is usually a converging structure, part of the combustible flue gas and combustible carbon particles generated during the gasification combustion of the biomass being burned in the furnace liner have a short residence time in the furnace liner, burn incompletely, and are easily carried out of the furnace along with the hot air in the furnace, which is not conducive to energy conservation 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 environment-friendly gasification combustion furnace, which can enable the biomass fuel to be fully burned in the furnace liner, and significantly reduce the emissions of combustible flue gas and combustible carbon particles generated during the gasification combustion of the biomass being burned in the furnace liner.

[0004] The technical solution of the present invention is: a gasification combustion furnace, including a furnace body, the furnace body includes an outer shell and a furnace liner arranged inside the outer shell, the furnace liner is a movable furnace liner, and the furnace liner is movably installed inside the outer shell. This gasification combustion furnace further includes: A number of secondary air inlet gasification combustion assisting holes are opened on the side wall of the furnace liner.

[0005] A secondary air inlet channel is arranged between the furnace liner and the outer shell and is connected to the secondary air inlet gasification combustion assisting holes. The secondary air inlet channel provides secondary air for combustion assistance to the furnace liner through the secondary air inlet gasification combustion assisting holes.

[0006] A tertiary air inlet swirling fire gasification burner is arranged at the upper end inside the furnace liner, including an annular cavity. A plurality of tertiary air inlet pipes with the same inclination direction and connected to the annular cavity are arranged circumferentially around the annular cavity. The air inlet ends of each tertiary air inlet pipe are respectively fixed to the inner wall of the furnace liner and are connected to the secondary air inlet gasification combustion assisting holes at the air inlet ends. A plurality of tertiary air inlet swirling fire gasification combustion assisting holes are also arranged circumferentially along the inner side wall of the annular cavity; the tertiary air inlet swirling fire gasification burner can make the combustion effect better, more energy-saving and environment-friendly. Since the tertiary air inlet swirling fire gasification burner is arranged at the upper end inside the furnace liner at the same time, by introducing tertiary air, the combustible components passing through the upper end inside the furnace liner can be better burned out. Under the combined action of the secondary air and the tertiary air, the effect of full combustion of the combustible components in the furnace liner is achieved.

[0007] The return air and smoke exhaust passage is arranged between the furnace liner and the outer shell and is connected to the top of the furnace liner.

[0008] The above-mentioned secondary air inlet and gasification combustion-assisting holes are arranged on the side wall of the upper part of the furnace liner or on the side wall of the whole furnace liner, and the secondary air is introduced into the furnace liner through the side wall of the furnace liner.

[0009] On the outer wall of the upper part of the above-mentioned furnace liner, a plurality of secondary air inlet and flow-guiding partition plates with the same inclination direction are arranged along its circumference. The positional relationship between the secondary air inlet and gasification combustion-assisting holes on the side wall of the upper part of the furnace liner and the secondary air inlet and flow-guiding partition plates is as follows: A plurality of secondary air inlet and gasification combustion-assisting holes are arranged between adjacent two secondary air inlet and flow-guiding partition plates, and the plurality of secondary air inlet and gasification combustion-assisting holes are arranged along the longitudinal direction of the secondary air inlet and flow-guiding partition plates; The inclination direction of each secondary air inlet and flow-guiding partition plate is opposite to the inclination direction of the tertiary air inlet pipe of the tertiary air swirling and gasification burner, so that the swirling direction of the combustion-supporting air blown out from the tertiary air swirling and gasification combustion-assisting holes in the middle hollow space of the annular cavity and the swirling direction of the combustible flue gas with weakened swirling force entering the middle hollow space of the annular cavity from the core combustion area of the furnace liner are opposite, and thus better turbulence of flue gas and air can be formed in the middle hollow space of the annular cavity, achieving a more sufficient combustion effect.

[0010] A flame flow-guiding disc is arranged on the top of the above-mentioned furnace liner. The flame flow-guiding disc includes a plurality of swirling fire blades and a plurality of heat-conducting columns respectively arranged along the circumference of the top of the furnace liner. The plurality of swirling fire blades are located inside the plurality of heat-conducting columns. Each swirling fire blade is arranged obliquely in the same direction clockwise or counterclockwise. The swirling fire blade can make the flame burn in a rotating manner and enable the combustible components in the smoke and fire to burn sufficiently, while the heat-conducting column can effectively collect and store heat and improve the heat utilization rate; An activity furnace cover is arranged on the furnace mouth at the top of the outer shell of the furnace body. The area between the flame flow-guiding disc and the activity furnace cover forms a combustion chamber; The return air and smoke exhaust passage is connected to the furnace liner through the gaps between the swirling fire blades and the gaps between the heat-conducting columns and the top of the furnace liner.

[0011] A secondary air duct outer cover is arranged outside the above-mentioned furnace liner. The secondary air duct outer cover divides the space between the outer shell of the furnace body and the furnace liner into a return air and smoke exhaust passage and a secondary air inlet passage. The return air and smoke exhaust passage is located on one side of the outer shell of the furnace body, and the secondary air inlet passage is located on one side of the furnace liner.

[0012] The above-mentioned secondary air inlet passage is connected to a secondary air inlet control switch, and the secondary air inlet control switch is arranged on the furnace body.

[0013] A fuel adding port extending from the outer shell of the furnace body to the inside of the furnace liner is also arranged on the side wall of the above-mentioned furnace body; A secondary air inlet shunt plate is arranged above the connection between the fuel adding port and the furnace liner on the outer wall of the furnace liner.

[0014] A plurality of metal heat collection grids arranged vertically, horizontally or obliquely are arranged along the circumference of the outer shell of the furnace body on the inner wall or outer wall of the outer shell.

[0015] The above-mentioned furnace liner includes a movable lower furnace bridge provided at its bottom, and an ash hopper is provided below the lower furnace bridge. The ash hopper is used to collect the ash after combustion and adjust the position of the ash hopper so that the primary air enters the furnace liner from the bottom of the lower furnace bridge; an upper furnace bridge which is movable and convenient for taking and placing 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.

[0016] The above-mentioned furnace liner is movably installed in the outer shell of the furnace body and is detachably connected to the outer shell. The furnace liner is taken out and put into the furnace through the furnace mouth at the top of the outer shell of the furnace body.

[0017] Advantages of the present invention: The present invention provides a gasification combustion furnace, which has the following technical advantages: In the present invention, secondary air gasification combustion-assisting holes with the same oblique direction are provided in the upper part of the furnace liner, and a tertiary air inlet pipe and tertiary air swirling combustion-assisting holes with the same oblique direction are provided on the tertiary air swirling fire gasification burner; the secondary air is introduced again through the secondary air gasification combustion-assisting holes, increasing the turbulence of the flame and flue gas and air in the furnace liner, making the combustible flue gas and air fully mixed, prolonging the residence time of the combustible components such as the combustible flue gas and carbon particles in the flue gas during combustion on the furnace body, being beneficial to heat exchange, prolonging the combustion time, strengthening the combustion process, enabling sufficient combustion time, and promoting the full combustion of the combustible components in the fuel; at the same time, the tertiary air swirling fire gasification burner provided at the upper end inside the furnace liner introduces tertiary air through the tertiary air inlet pipe. When the unburned combustible components passing through the upper end inside the furnace liner pass through the middle space of the annular cavity of the tertiary air swirling fire gasification burner, a rotary combustion flame is formed under the action of the combustion-assisting air ejected from each tertiary air swirling combustion-assisting hole, which can fully burn out the combustible components passing through the upper end inside the furnace liner, saving fuel and being beneficial to environmental protection. The flame burning in the furnace liner of the present invention is a rotary combustion flame, which is easy to ignite when the cold furnace is started, has a fast ignition, and burns more fully. When the present invention is used, it can burn with natural air intake or can be assisted by forced air supply with a blower.

[0018] The provided figure-eight-shaped flue gas passage 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 of heat dissipation and excessive exhaust gas temperature, and enables the fuel to achieve full gasification combustion.

[0019] The stove provided by the present invention is more energy-saving and environmentally friendly, effectively improving the energy utilization rate. It is convenient to use. Since the furnace liner and the furnace bridge are detachably arranged in the furnace body, it is convenient to repair and replace such easily burned components, and it is universal for the existing fuels used, which is beneficial to popularization and application. Brief Description of the Drawings

[0020] Figure 1 It is a schematic diagram of the basic structure of the present invention; Figure 2 For the present inventionFigure 1 Schematic diagram of the structure of drilling holes all over the furnace lining in the direction of A; Figure 3 For the present invention Figure 1 Schematic diagram of the structure of a secondary air inlet shunt plate provided at the upper part of the furnace lining in the direction of A; Figure 4 For the present invention Figure 1 Schematic diagram of the structure of a secondary air inlet shunt plate and drilling holes all over the furnace lining provided at the upper part of the furnace lining in the direction of A; Figure 5 For the present invention Figure 1 Schematic diagram of the structure of a three - stage air inlet swirling fire gasification burner provided at the upper part of the furnace lining in the direction of A; Figure 6 For the present invention Figure 1 Schematic diagram of the structure of an extended furnace body; telescopic movable flue in the direction of A; Figure 7 For the present invention Figure 1 Schematic diagram of the structure of a movable triangular flue of an extended furnace body in the direction of A; Figure 8 For the present invention Figure 2 、 Figure 3 、 Figure 4 as well as Figure 5 Schematic diagram of the structure without a return air exhaust flue on one side of the fuel inlet; Figure 9 For the present invention Figure 6 as well as Figure 7 Schematic diagram of the structure without a return air exhaust flue on one side of the fuel inlet; Figure 10 Schematic diagram of the structure of a heat - insulating movable furnace lining for the present invention; Figure 11 For the present invention, heat - insulating bottle - shaped movable furnace lining Figure 10 Schematic diagram of the structure in the direction of A; Figure 12 For the present invention, heat - insulating bottle - shaped movable furnace lining Figure 10 Schematic diagram of the structure of an extended furnace body in the direction of A; Figure 13 Top - view schematic diagram of the structure of the flame deflector disk for the present invention; Figure 14 Three - dimensional schematic diagram of the structure of the flame deflector disk for the present invention; Figure 15 Top - view schematic diagram of the structure with multiple round holes on the flame deflector disk for the present invention; Figure 16 Three - dimensional schematic diagram of the structure with multiple round holes on the flame deflector disk for the present invention; Figure 17 Schematic diagram of the structure of a three - stage air inlet swirling fire gasification burner for the present invention; Figure 18 Schematic diagram of the structure of the movable fire - sealing cover for the present invention.

[0021] Description of the reference numerals: 1, furnace body; 2, furnace liner; 3, secondary air inlet gasification combustion assisting holes; 4, outer cover of the secondary air duct; 5, swirling fire blades; 6, heat conduction columns; 7, secondary air inlet flow dividing plate; 8, combustion chamber; 9, base; 10, ash hopper; 11, lower furnace bridge; 12, secondary air inlet control switch; 13, secondary air inlet passage; 14, return air and smoke exhaust passage; 15, movable furnace cover; 16, connecting panel screw holes; 17, fuel adding port; 18, heat collecting grid; 19, flue; 20, oven; 21, upper smoke exhaust port; 22, lower smoke exhaust port; 23, flue gas conversion switch; 24, ash cleaning door; 25, furnace bridge door; 26, smoke exhaust outlet; 27, secondary air inlet guiding partition plate; 28, upper furnace bridge; 29, tertiary air swirling fire gasification burner; 30, tertiary air inlet pipe; 31, tertiary air swirling fire gasification combustion assisting holes; 32, movable fire sealing cover; 33, anti-scalding cover. Specific embodiments

[0022] The following will describe in detail the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0023] Embodiment: Refer to Figure 1 , Figure 2 and Figure 5 As shown, the gasification combustion furnace provided in this embodiment includes a furnace body 1, and an anti-scalding cover 33 is provided on the periphery of the furnace body 1. The furnace body 1 includes an outer shell and a furnace liner 2 provided inside the outer shell. The furnace liner 2 is a movable furnace liner 2, that is, the furnace liner 2 is movably installed inside the outer shell. The shape of the furnace liner 2 is a thermos bottle shape, a cone, a cylinder, a prism, a cube or a cuboid. A movable fire sealing cover 32 (the movable fire sealing cover 32 is shown in Figure 18 ) for adjusting the size of the smoke exhaust is provided at the top of the furnace liner 2. This gasification combustion furnace further includes: a plurality of secondary air inlet gasification combustion assisting holes 3, a secondary air inlet passage 13, a tertiary air swirling fire gasification burner 29, and a return air and smoke exhaust passage 14. Among them, a normal furnace liner 2 air inlet is provided at the bottom of the furnace liner 2 as a primary air inlet port. The secondary air inlet gasification combustion assisting holes 3 are opened on the side wall of the furnace liner 2. The secondary air inlet passage 13 is provided between the furnace liner 2 and the outer shell. The lower end of the secondary air inlet passage 13 communicates with the outside from the lower end of the furnace body 1 to achieve secondary air inlet, and the secondary air inlet passage 13 is connected to the secondary air inlet gasification combustion assisting holes 3. The secondary air inlet passage 13 provides secondary air for combustion assistance to the furnace liner 2 through the secondary air inlet gasification combustion assisting holes 3. Among them, the secondary air inlet gasification combustion assisting holes 3 are circular holes, strip holes, oval holes, triangular holes, trapezoidal or square holes. The secondary air inlet gasification combustion assisting holes 3 are holes arranged in a straight direction or in an oblique direction. The tertiary air swirling fire gasification burner 29 is provided at the upper end inside the furnace liner 2, as shown in Figure 9As shown in the figure, the three - stage air - inlet swirling - fire gasification burner 29 includes an annular cavity. When the gas burning in the furnace liner 2 rises, it will pass through the hollow space in the middle of the annular cavity. A plurality of tertiary air inlet pipes 30 with the same inclination direction are arranged circumferentially around the annular cavity (that is, the included angles between each tertiary air inlet pipe 30 and the outer wall of the annular cavity are the same and obliquely in the same direction). The number of the tertiary air inlet pipes 30 can be set to 3 - 6. The air - inlet ends of each tertiary air inlet pipe 30 are respectively fixed to the inner wall of the furnace liner 2 and communicate with the secondary air - inlet gasification combustion - assisting holes 3 at the air - inlet ends. A plurality of tertiary air - inlet swirling - fire gasification combustion - assisting holes 31 are also arranged circumferentially along the inner - side wall of the annular cavity. The tertiary air - inlet swirling - fire gasification combustion - assisting holes 31 are set as circular holes or vertical strip - shaped holes with the same inclination direction. Since the inclination directions of each tertiary air inlet pipe 30 are the same, the combustion - assisting air blown out from the tertiary air - inlet swirling - fire gasification combustion - assisting holes 31 will be in a swirling state in the hollow space in the middle of the annular cavity. The return air and smoke exhaust passage 14 is arranged between the furnace liner 2 and the outer shell and communicates with the top of the furnace liner 2.

[0024] The three - stage air - inlet swirling - fire gasification burner 29 of this embodiment can achieve better combustion effect, more energy - saving and environmental - protection. One end of the tertiary air inlet pipe 30 is connected to the secondary air - inlet passage 13 through the furnace - liner 2 wall, and the other end is connected to the annular cavity of the three - stage air - inlet swirling - fire gasification burner 29 and sprays out from the tertiary air - inlet swirling - fire gasification combustion - assisting holes 31 to participate in gasification combustion. Since the three - stage air - inlet swirling - fire gasification burner 29 is arranged at the upper end inside the furnace liner 2 at the same time, and the tertiary air is introduced through the tertiary air inlet pipe 30, the unburned combustible components passing through the upper end inside the furnace liner 2 will form a rotary combustion flame under the action of the combustion - assisting air sprayed out from each tertiary air - inlet swirling - fire gasification combustion - assisting hole 31 when passing through the middle space of the annular cavity of the three - stage air - inlet swirling - fire gasification burner 29, which can fully burn the combustible components passing through the upper end inside the furnace liner 2, with strong firepower, fuel saving and environmental protection. The gasification combustion furnace provided in this embodiment can achieve the effect of fully burning the combustible components in the furnace liner 2 under the combined action of the primary air, secondary air and tertiary air.

[0025] The furnace liner 2 of this embodiment is set as a movable type, which makes it convenient to take out the furnace liner 2 from the furnace body 1, so as to facilitate cleaning the inside of the furnace liner 2 and the furnace body 1. Especially, it can conveniently clean the secondary air - inlet gasification combustion - assisting holes 3 on the furnace liner 2 to avoid being blocked by combustion residues. At the same time, since the furnace liner 2 is set as a movable type, it is convenient to clean the secondary air - inlet passage 13 between the furnace liner 2 and the inner wall of the furnace body 1 after taking out the furnace liner 2, so as to avoid the problem that the combustion residues fall from the secondary air - inlet gasification combustion - assisting holes 3 on the furnace liner 2 into the secondary air - inlet passage 13 and cause poor air flow in the furnace due to long - term use.

[0026] In some embodiments, refer to Figure 4 and Figure 5, on one side of the furnace body 1, there is a flue 19. The flue 19 is connected to one side of the return air and smoke exhaust passage 14. An oven 20 is provided on the flue 19. The oven 20 divides the flue 19 into a smoke passage in a shape of a double-layered rectangle in the up-down, front-back directions. On the return air and smoke exhaust passage 14, there are an upper smoke exhaust port 21 and a lower smoke exhaust port 22 connected to the flue 19. At the smoke passage of the upper smoke exhaust port 21, there is a smoke conversion switch 23. The smoke conversion switch 23 can control the flow direction of the smoke in the return air and smoke exhaust passage 14. The flue 19 is set to be movable, and can be freely removed and installed. The flue 19 has an ash cleaning door 24 and a smoke exhaust outlet 26. When in use, a suitable matching flue 19 can be selected according to needs. Along the circumference of the outer shell of the furnace body 1, there are also multiple metal heat collecting grids 18 arranged vertically, horizontally or obliquely on the inner or outer wall of the outer shell (see Figure 1 shown). During the downward flow of the high-temperature smoke, the return air and smoke exhaust passage 14 and the heat collecting grids 18 can fully absorb and dissipate the heat in the smoke.

[0027] In some other embodiments, see Figure 6 shown. Different from the above embodiments (see Figure 5 ), an oven 20 is provided inside the furnace body 1. The provided oven 20 divides the smoke passage of the return air and smoke exhaust passage 14 on one side inside the furnace body 1 into a smoke passage in a shape of a double-layered rectangle in the up-down, front-back directions, and there are corresponding upper smoke exhaust port 21 and lower smoke exhaust port 22. At the smoke passage of the upper smoke exhaust port 21, a smoke conversion switch 23 is provided. The smoke conversion switch 23 can control the flow direction of the smoke. The flue 19 is set to be movable, telescopic and rotatable (formed by telescopic sleeve connection of multiple metal smoke exhaust pipes with gradually decreasing diameters in sequence). Its length can be adjusted freely, and the flue 19 can be rotated 360 degrees arbitrarily, so as to adjust the direction of the smoke exhaust outlet 26 provided at its end, and it can be freely removed and installed. The double-layered rectangle-shaped smoke passage in this embodiment prolongs the residence time of the smoke inside the furnace body 1, improves the heat radiation effect inside the furnace body 1, and reduces the heat loss caused by excessive heat dissipation and smoke exhaust temperature.

[0028] See Figure 6 . For this embodiment, the whole furnace liner 2 is drilled with secondary air intake and gasification combustion holes 3, the furnace liner 2 does not have a secondary air intake shunt plate 7, and an ash cleaning door 24 is provided at the bottom of the furnace body 1.

[0029] In some other embodiments, see Figure 7 shown. An oven 20 is provided inside the furnace body 1. Different from the above embodiments, an angled flue 19 is provided on the side of the furnace body 1, and a smoke exhaust outlet 26 is provided on the flue 19.

[0030] Furthermore, the secondary air intake and gasification combustion holes 3 are provided on the side wall of the upper part of the furnace liner 2 or on the side wall of the whole furnace liner 2. Among them Figure 1 only the secondary air intake and gasification combustion holes 3 are drilled on the upper part of the furnace liner 2, Figure 2Secondary air inlet gasification combustion assisting holes 3 are drilled throughout the entire body of the furnace liner 2. For fuels with low flue gas content, a furnace liner 2 with secondary air inlet gasification combustion assisting holes 3 drilled only in the upper part of the furnace liner 2 is selected. For fuels with high flue gas content, a furnace liner 2 with secondary air inlet gasification combustion assisting holes 3 drilled throughout the entire body of the furnace liner 2 is selected. Therefore, one of the two types of furnace liners 2 with different structures of secondary air inlet gasification combustion assisting holes 3 can be selected according to the type of fuel's flue gas content, so as to achieve the effect of reasonably supplying combustion-supporting air and achieving full combustion.

[0031] In some embodiments, referring to Figure 3 and Figure 4 , a plurality of secondary air inlet flow guiding partitions 27 with the same inclination direction are further provided on the outer wall of the upper part of the furnace liner 2 along its circumferential direction. The positional relationship between the secondary air inlet gasification combustion assisting holes 3 on the side wall of the upper part of the furnace liner 2 and the secondary air inlet flow guiding partitions 27 is as follows: A plurality of secondary air inlet gasification combustion assisting holes 3 are arranged between adjacent two secondary air inlet flow guiding partitions 27, and the plurality of secondary air inlet gasification combustion assisting holes 3 are arranged along the longitudinal direction of the secondary air inlet flow guiding partitions 27; each secondary air inlet flow guiding partition 27 is arranged with the same inclination direction, so that the air inlet from the secondary air inlet gasification combustion assisting holes 3 between adjacent two secondary air inlet flow guiding partitions 27 has the same direction under the guiding effect of the two adjacent secondary air inlet flow guiding partitions 27, and the air inlet direction between each group of adjacent secondary air inlet flow guiding partitions 27 changes gradually in sequence, so that the secondary air inlet inside the furnace liner 2 presents a certain swirling state. Under the combined action of the swirling secondary air inlet, the primary air inlet and the combustion gas inside the furnace liner 2, the turbulence of the flame, flue gas and air in the core combustion area inside the furnace liner 2 is increased, so that the combustible flue gas and air are fully mixed and fully burned. In addition, since the secondary air inlet flow guiding partition 27 is connected to the outer wall of the furnace liner 2 and has a relatively high temperature, the secondary air inlet flow guiding partition 27 can also preheat the secondary air inlet entering from the side wall of the upper part of the furnace liner 2 quickly in advance, so that the secondary air inlet entering the furnace liner 2 has a relatively high temperature, thereby greatly improving the gasification combustion effect. In this embodiment, the inclination direction of each secondary air inlet flow guiding partition 27 can be set to be opposite to the oblique direction of the tertiary air inlet swirling gasification burner 29's tertiary air pipe 30, so that the swirling direction of the combustion-supporting air blown out from the tertiary air inlet swirling gasification combustion assisting holes 31 in the middle hollow space of the annular cavity is opposite to the swirling direction of the combustible flue gas with weakened swirling force entering the middle hollow space of the annular cavity from the core combustion area of the furnace liner 2, so as to form better turbulence of flue gas and air in the middle hollow space of the annular cavity and achieve a more sufficient combustion effect.

[0032] As Figure 3 shown, secondary air inlet gasification combustion assisting holes 3 are drilled in the upper part of the furnace liner 2, Figure 4As shown, secondary air inlet gasification combustion-assisting holes 3 are drilled throughout the entire body of the furnace liner 2. In this embodiment, a secondary air inlet diversion partition 27 is provided between the vertical directions of the secondary air inlet gasification combustion-assisting holes 3 at the upper part of the furnace liner 2. The secondary air inlet diversion partitions 27 are arranged obliquely in the same direction. The secondary air inlet diversion partitions 27 enable the stove to effectively absorb heat during combustion and quickly heat the secondary air inlet, greatly improving the gasification combustion effect.

[0033] In some embodiments, a flame diversion plate is provided at the top of the furnace liner 2. The flame diversion plate includes a plurality of swirling fire blades 5 and a plurality of heat-conducting columns 6 respectively arranged along the circumference of the top of the furnace liner 2. The plurality of swirling fire blades 5 are located inside the plurality of heat-conducting columns 6. Each swirling fire blade 5 is arranged obliquely in the same direction clockwise or counterclockwise (see Figure 8 as shown). The swirling fire blades 5 in this embodiment can make the flame burn in a rotary manner, enabling the combustible components in the smoke and fire to burn fully. The heat-conducting columns 6 can effectively accumulate and store heat, improving the heat utilization rate. An activity furnace cover 15 and connecting panel screw holes 16 are provided at the furnace opening on the top of the outer shell of the furnace body 1; the area between the flame diversion plate and the activity furnace cover 15 forms a combustion chamber 8, that is, a combustion chamber 8 is formed between the swirling fire blades 5, the heat-conducting columns 6 and the activity furnace cover 15; the return air and smoke exhaust passage 14 is connected to the furnace liner 2 through the gaps between the swirling fire blades 5 and the gaps between the heat-conducting columns 6 and communicates with the top of the furnace liner 2.

[0034] In some embodiments, a secondary air duct outer cover 4 is provided outside the furnace liner 2. The secondary air duct outer cover 4 divides the space between the outer shell of the furnace body 1 and the furnace liner 2 into a return air and smoke exhaust passage 14 and a secondary air inlet passage 13. The return air and smoke exhaust passage 14 is located on one side of the outer shell of the furnace body 1, and the secondary air inlet passage 13 is located on one side of the furnace liner 2.

[0035] Furthermore, the secondary air inlet passage 13 is connected to a secondary air inlet control switch 12, and the secondary air inlet control switch 12 is arranged on the furnace body 1.

[0036] In some embodiments, see Figure 2 [[ID= sixteen]]as shown, the furnace liner 2 includes a movable lower furnace bridge 11 provided at its bottom. The lower furnace bridge 11 is a push-pull type or a back-and-forth swinging type and is easy to replace. A ash hopper 10 and a base 9 are provided below the lower furnace bridge 11. The lower furnace bridge 11 is connected with a handle, and the handle 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 enters the furnace liner 2 from the bottom of the lower furnace bridge 11. By pulling the handle, the lower furnace bridge 11 can be moved, thereby cleaning the ash and slag in the furnace liner 2 and making it fall into the ash hopper 10. A furnace bridge door 25 for installing and 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 it is convenient and fast to install and remove the furnace bridge.

[0037] In some embodiments, a fuel adding port 17 extending from the outer shell of the furnace body 1 to the furnace liner 2 is further provided on the side wall of the furnace body 1. One end of the fuel adding port 17 is located outside the furnace body 1, and the other end is connected to the furnace liner 2. The fuel adding port 17 is arranged with a lower inner side and a higher outer side, and is inclined downward inside to facilitate the smooth falling of the fuel onto the furnace bridge when adding solid fuel; above the connection between the fuel adding port 17 and the furnace liner 2 on the outer wall of the furnace liner 2, a secondary air inlet shunt plate 7 is provided. Since there is a fuel adding port 17 between the outer shell of the furnace body 1 and the furnace liner 2, the secondary air inlet channel 13 is blocked on one side of the furnace body 1 where the fuel adding port 17 is located, affecting the uniformity of the secondary air inlet above the fuel adding port 17 and causing uneven combustion. Therefore, the secondary air inlet shunt plate 7 provided enables the secondary air to enter evenly into the secondary air gasification combustion holes 3 above the furnace liner 2 for sufficient gasification combustion, without the occurrence of uneven combustion, effectively solving the problem of uneven combustion, and thus achieving the effect of stable and non-uneven gasification combustion flame and sufficient gasification combustion. Above the lower furnace bridge 11, a movable upper furnace bridge 28 (see Figure 7 ) is further provided for easy taking and placing, and the upper furnace bridge 28 can be freely taken and installed from the fuel adding port 17 according to the usage needs.

[0038] See Figure 8 、 Figure 9 As shown, the difference between the gasification combustion furnace provided in this embodiment and the Figures 2 - 7 embodiment is that; in order to simplify the process and facilitate manufacturing, a return air and exhaust smoke channel 14 is not provided on one side of the fuel adding port 17, which is convenient for production and processing.

[0039] Refer to Figure 10 、 Figure 11 、 Figure 12 As shown, the gasification combustion furnace provided in this embodiment further optimizes the production process; the furnace liner 2 is designed in the shape of a thermos bottle to better reflect the combustion effect, and for more convenient production; a return air and exhaust smoke channel 14 is provided outside the furnace liner 2, and the furnace liner 2 is movable for easy taking and installation.

[0040] In some embodiments, the furnace liner 2 is movably installed inside the outer shell of the furnace body 1, that is, the furnace liner 2 is detachably connected to the outer shell. Specifically, a retaining ring for fixing the furnace liner 2 is provided inside the furnace body 1 and around the furnace liner 2, and the bottom of the movable furnace liner 2 is placed in the retaining ring for fixation to achieve detachable connection, and the furnace liner 2 can be taken out and put into through the furnace opening at the top of the outer shell of the furnace body 1.

[0041] The working principle process of the gasification combustion furnace disclosed in the present invention is: When using solid fuel, open the movable furnace cover 15, load fuel into the furnace chamber 2 until it is below the first row of secondary air inlet gasification combustion-assisting holes 3 at the upper part of the furnace chamber 2, pull open the ash hopper 10 to allow primary air to enter the furnace chamber 2 from the bottom of the furnace grate, ignite the fuel from the top of the fuel. The fuel undergoes pyrolysis gasification reaction in the furnace chamber 2 to generate combustible gas. The secondary air enters the secondary air passage 13 through the secondary air control switch 12, and then enters through the secondary air inlet gasification combustion-assisting holes 3. When the combustible gas rises to the secondary air inlet gasification combustion-assisting holes 3, the combustible gas with secondary air supply undergoes sufficient gasification combustion in the combustion chamber 8. An gasification combustion furnace with a tertiary air swirling fire gasification burner 29 is provided at the upper part of the furnace chamber 2. The tertiary air enters successively through the secondary air passage 13 and the secondary air inlet gasification combustion-assisting holes 3 connected to the air inlet end of the tertiary air pipe 30, then enters the tertiary air swirling fire gasification burner 29 through the tertiary air pipe 30, and finally sprays out rotating flames from the tertiary air swirling fire combustion-assisting holes 31 for gasification combustion. For the gasification combustion furnace with only secondary air inlet gasification combustion-assisting holes 3 opened at the upper part of the furnace chamber 2, the intensity of the fire power is adjusted by the size of the gap of the opened ash hopper 10 to control the amount of primary air, thereby controlling the fire power. During the combustion process, when fuel needs to be added, fuel can be added into the furnace chamber 2 from the fuel filling port 17 or from the movable furnace cover 15. When the cold furnace ignition chimney has not generated suction, open the flue gas conversion switch 23, and the flue gas is discharged from the upper flue gas outlet 21 through the chimney installed at the flue gas outlet 26. After the chimney forms suction after being heated by the flue gas for more than ten minutes, the flue gas conversion switch 23 can be closed to allow the flue gas to pass through the return air flue gas passage 14, pass through the lower flue gas outlet 22, pass through the rear side of the oven 20, and finally be discharged from the chimney installed at the flue gas outlet 26 on the flue 19.

[0042] When sealing the fire, add some fuel into the furnace chamber 2, cover the movable fire-sealing cover 32 on the top of the furnace chamber 2, adjust the size of the smoke exhaust hole through the adjusting plate of the movable fire-sealing cover 32 according to the requirement of the smoke exhaust concentration of the fuel in the furnace chamber 2 during fire sealing for smoke exhaust, close the ash hopper 10 to control the primary air properly, and leave a little gap in the ash hopper 10 for air intake to keep the fire in the furnace chamber 2 from going out to seal the fire. When fire is needed, take out the movable fire-sealing cover 32 and slightly open the primary air of the ash hopper 10 to enter the furnace chamber 2, and the flame will immediately ignite for use. The ash residue after combustion will fall into the ash hopper 10 by pulling the lower furnace grate 11.

[0043] The gasification combustion furnace with a furnace liner 2 fully equipped with secondary air inlet gasification combustion-assisting holes 3 is loaded with fuel in the furnace liner 2 below the first row of secondary air inlet gasification combustion-assisting holes 3 at the upper part of the furnace liner 2 during use. Pull the ash hopper 10 to allow primary air to enter the furnace liner 2 from the bottom of the furnace grate, ignite the fuel from the top of the fuel, then fully open the secondary air inlet control switch 12. After the fire burns brightly, close the ash hopper 10 and the primary air inlet. Control the size of the fire by adjusting the size of the aperture of the opened secondary air inlet control switch 12 according to the required fire size. (The operation of the flue gas conversion switch 23 is the same as above). The flue gas generated after sufficient gasification combustion is discharged from the smoke exhaust outlet 26 on the flue 19. When sealing the fire, add some fuel into the furnace liner 2, cover the movable fire-sealing cover 32 above the furnace liner 2. Since the types of fuel in the furnace liner 2 are different, the concentrations of the flue gas generated during combustion are different. When sealing the fire, according to the concentration of the flue gas generated during combustion, adjust the size of the smoke exhaust hole through the adjusting plate on the fire-sealing cover 32 for smoke exhaust and fire sealing. Close the ash hopper 10 and the primary air inlet, then close the secondary air inlet control switch 12 and leave a little aperture for air intake appropriately to keep the fire in the furnace liner 2 from going out, thus sealing the fire. When fire is needed, take out the movable furnace cover 15 and open the secondary air inlet control switch 12, and the flame will quickly ignite, then fire can be used. For the first, second, and third air inlets of the present invention, natural air intake or forced air supply by a blower can be used.

[0044] The above is a specific embodiment of the present invention, and it does not limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various transformations of its technical solutions are within the protection scope 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 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.

2. The gasification combustion furnace according to claim 1, characterized in that: The secondary air inlet gasification combustion-supporting hole is arranged on the side wall of the upper part of the furnace or on the side wall of the entire furnace.

3. The gasification combustion furnace according to claim 2, characterized in that: 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. 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.

4. 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 connected to the furnace top through the gaps between the fire rotating blades and the gaps between the heat conducting columns.

5. 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.

6. The gasification combustion furnace according to claim 5, 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.

7. The gasification combustion furnace according to claim 6, 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.

8. 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.

9. The gasification combustion furnace according to claim 1 or 7, 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.

10. The gasification combustion furnace according to claim 1 or 4, 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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