A composite garbage pyrolysis furnace

Abstract

The present invention relates to a composite garbage pyrolysis furnace, comprising: a furnace body, a material processing cavity is formed inside the furnace body, and a feed port connected to the material processing cavity is opened on the upper part; a gas extraction device is arranged in the furnace body, and is used to collect garbage pyrolysis gas, and the gas extraction device has a conical top surface and a gas extraction port located on the inner wall of the conical top surface, and the conical top surface is used to guide the garbage material to be distributed toward the inner peripheral wall of the furnace body; a pipe assembly is arranged in the furnace body, and a secondary combustion chamber is formed inside the pipe assembly, and one end of the secondary combustion chamber is connected to the gas extraction port, and the other end extends outside the furnace body, and is provided for the circulation of garbage pyrolysis gas. In the composite garbage pyrolysis furnace, garbage can be evenly distributed in the furnace body, and the tar generated after the pyrolysis of garbage is prevented from clogging the gas extraction device. The tar is cracked and does not solidify. The garbage has sufficient combustible components during the pyrolysis process, and can be burned and maintained and cracked by combustion. The temperature required for dioxin.

Description

Technical Field

[0001] The invention relates to the technical field of garbage disposal, and in particular to a composite garbage pyrolysis furnace. Background Art

[0002] The existing small-scale pyrolysis devices for treating less than 20 tons of garbage are generally composed of a garbage drying pretreatment device, a feeding device, a garbage pyrolysis furnace, a secondary combustion device, an exhaust gas treatment device, and a odor treatment device generated by drying. The flue gas generated after combustion has a high tar content. The incineration of garbage is an important means of reducing and harmless treatment. However, the existing pyrolysis garbage treatment device can only heat the temperature in its furnace to 450 to 750 degrees Celsius. During the incineration process, dioxins, heavy metals, and acidic gases will be generated, which are likely to cause secondary pollution to the environment. Many harmful substances are likely to be generated during the incineration process, especially dioxins, a highly toxic and carcinogenic pollutant.

[0003] The garbage pyrolysis gasification furnace described in application publication number CN 113249143 A and the garbage pyrolysis furnace described in application publication number CN110805908 A have the following problems: 1. During the pyrolysis of garbage, tar and garbage are easy to block the smoke inlet and smoke outlet, and tar is easy to solidify; 2. The combustible components of the pyrolysis gas are insufficient, and it cannot be burned or the degree of combustion is not enough to maintain the temperature above 850°C required for cracking dioxins; 3. Due to the poor fluidity of the garbage material, the garbage is unevenly distributed in the pyrolysis furnace. A garbage pyrolysis tar separation device is described in application publication number CN 113136238 A, and the tar is treated by spraying water, which is easy to cause secondary pollution. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned technical deficiencies and propose a composite garbage pyrolysis furnace to solve the technical problems in the prior art that garbage and tar are easy to block the smoke pipe during the pyrolysis process of garbage, tar is easy to solidify, the pyrolysis gas has insufficient combustible components and cannot be burned or the degree of combustion is insufficient to maintain the temperature above 850°C required for cracking dioxins, the garbage is unevenly distributed inside the pyrolysis furnace, and the tar treatment is easy to cause secondary pollution.

[0005] In order to achieve the above technical objectives, the technical solution of the present invention includes a composite garbage pyrolysis furnace, including: a furnace body, a material processing chamber is formed inside the furnace body, and a feed port connected to the material processing chamber is opened on the upper part; a gas extraction device, the gas extraction device is arranged in the furnace body, and is used to collect garbage pyrolysis gas, the gas extraction device has a conical top surface and a gas extraction port located on the inner wall of the conical top surface, the conical top surface is used to prevent garbage materials from sticking to and blocking the gas extraction port, and guide the garbage materials to be distributed toward the peripheral wall of the furnace body; a pipe assembly, the pipe assembly is arranged in the furnace body, a second combustion chamber is formed inside the pipe assembly, one end of the second combustion chamber is connected to the gas extraction port, and the other end extends outside the furnace body for the circulation of garbage pyrolysis gas; an ignition device, the ignition device has an ignition end, and the ignition end is provided with in the secondary combustion chamber, used for burning the pyrolysis gas in the secondary combustion chamber; an aftercombustion chamber, the aftercombustion chamber is located at one side of the furnace body, and the aftercombustion chamber is connected with the secondary combustion chamber, the pyrolysis gas is introduced into the aftercombustion chamber via the secondary combustion chamber and the ignition device, and the aftercombustion chamber is used to burn the incompletely burned combustible gas that flows into the aftercombustion chamber through the secondary combustion chamber; an air supply pipe, the air supply pipe is connected to the aftercombustion chamber, and is used to provide oxygen to the aftercombustion chamber; a distribution device, the distribution device is arranged in the furnace body and above the air intake device, and is used to evenly distribute the garbage introduced through the feed port; an air supply device, the air supply device has an intake end and an air outlet end, the intake end is located outside the furnace body, and the air outlet end is located inside the furnace body, and is used to introduce air outside the furnace body into the interior thereof.

[0006] Preferably, the air intake device includes: an air intake window, which is arranged directly below the feed port and is used for collecting and filtering pyrolysis gas, and the air intake port is opened in the air intake window; a crossbeam pipe, which is fixedly arranged in the material processing chamber, and one end of the crossbeam pipe is fixed to and communicated with the air intake window, and is used to support and connect the air intake window; a U-shaped cup, which is fixedly connected to and communicated with the air intake window, and the crossbeam pipe is fixed to and communicated with the air intake window through the U-shaped cup; a cloak, the upper part of the cloak forms a conical top surface, and the cloak is sleeved on the air intake window and the upper part of the U-shaped cup, and is used to prevent garbage materials from sticking to and blocking the air intake window, and guide the garbage materials to be distributed toward the inner wall of the furnace body.

[0007] Preferably, the pipe assembly includes: a vertical air duct and a horizontal air duct, the vertical air duct is arranged on the inner wall of the furnace body, the vertical air duct is connected with one end of the cross beam pipe, one end of the cross air duct is connected with an end of the vertical air duct away from the cross beam pipe, the other end of the cross air duct passes through the furnace body and is connected with the afterburner chamber, and the secondary combustion chamber is formed between the vertical air duct and the cross air duct.

[0008] Preferably, the ignition device is arranged on the side wall of the furnace body, and the ignition end of the ignition device passes through the furnace body and extends to the inside of the connection between the vertical air duct and the horizontal air duct.

[0009] Preferably, the distribution device is arranged above the cloak and is used for evenly distributing the garbage introduced through the feed port.

[0010] Preferably, the material distribution device includes two groups of pulley assemblies, steel cables, rake bars, connecting rods and driving components. The two groups of pulley assemblies are connected to the furnace body for relative rotation. The steel cables are sleeved on the pulleys of the two groups of pulley assemblies and tensioned. The rake bars are arranged on the steel cables. The connecting rods are connected to the axis of one group of pulley assemblies. The driving component is connected to the connecting rod for driving the connecting rod to rotate.

[0011] Preferably, the air supply device is arranged on one side of the furnace body and the air outlet end of the air supply device extends into the furnace body, the air outlet end of the air supply device is located below the transverse air duct, the air supply device includes a blower and an air supply duct, the blower is arranged on one side of the furnace body, the output end of the blower is connected to one end of the air supply duct, and the other end of the air supply duct passes through the furnace body and extends into the interior thereof.

[0012] Preferably, it further comprises a grate, wherein the grate is arranged inside the furnace body and below the air supply duct.

[0013] Compared with the prior art, the beneficial effects of the present invention include: the composite garbage pyrolysis furnace, through the arrangement of the gas taking device, the pipe assembly, the ignition device, the afterburner, the material distribution device and the air supply device, the garbage is pyrolyzed inside the furnace body, and the pyrolysis gas is collected through the gas taking device. The conical top surface prevents the garbage materials from sticking to and blocking the gas taking window, and conveniently guides the garbage materials to be distributed toward the peripheral wall of the furnace body. The gas taking window expands the gas taking contact surface and improves the gas taking efficiency. The gas taking port on the inner wall of the conical top surface is convenient for the gas taking device to collect the pyrolysis gas, and avoids the garbage from blocking the gas taking port. After the pyrolysis gas enters the pipe assembly, the ignition device burns the pyrolysis gas inside the pipe assembly to prevent tar from solidifying and avoid secondary pollution caused by tar. At the same time, the secondary combustion chamber allows the high-temperature gas to remain therein for a certain period of time to fully decompose harmful substances such as dioxins, which is also beneficial to the introduction of part of the heat energy into the material processing cavity, thereby improving the efficiency of garbage pyrolysis. The air supply volume is controlled by the air supply device to realize the combustion, reduction and The natural stratification of pyrolysis and drying produces a pyrolysis gas of garbage that contains some carbon monoxide, hydrogen, tar gas, some water vapor, and some oxygen. That is, the pyrolysis gas in the secondary combustion chamber can be ignited by an ignition device without the need for additional oxygen supply, so that the pyrolysis gas in the secondary combustion chamber produces secondary combustion. The combustion temperature reaches the temperature required for cracking dioxins, and the temperature inside the furnace body is increased by heat transfer. The afterburner can achieve complete combustion of the remaining combustible gas after the secondary combustion. The air supply pipe can provide air to the inside of the afterburner, and the garbage entering the furnace body can be evenly distributed through the distribution device. The composite garbage pyrolysis furnace solves the main problems of existing garbage pyrolysis furnaces. The garbage can be evenly distributed in the furnace body, avoiding the blockage of the gas extraction device by the garbage and the tar produced after the pyrolysis of the garbage. The tar is cracked and will not solidify. The garbage has sufficient combustible components during the pyrolysis process and can be burned and maintained and cracked by combustion at the temperature required for dioxins. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front view of the present invention;

[0015] Figure 2 is a front view of the air extraction device of the present invention;

[0016] Figure 3 It is a top view of the material distributing device of the present invention.

[0017] Figure numerals: 10, furnace body; 20, air intake device; 21, air intake window; 22, crossbeam pipe; 23, U-shaped cup; 24, cloak; 30, pipe assembly; 31, vertical air duct; 32, horizontal air duct; 40, ignition device; 50, afterburner chamber; 60, distribution device; 61, pulley assembly; 62, steel cable; 63, rake bar; 64, connecting rod; 65, driving member; 70, air supply device; 80, grate. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] like Figure 1-3 As shown, the present invention provides a composite garbage pyrolysis furnace, including: a furnace body 10, an air intake device 20, a pipe assembly 30, an ignition device 40, an afterburner 50, a material distribution device 60, an air supply device 70, a grate 80, an ash hopper and an upper cover plate.

[0020] A material processing cavity is formed inside the furnace body 10, and a feed port connected to the material processing cavity is opened on the upper part; the upper cover plate is clamped on the furnace body 10 to close the feed port, and the feed port is opened at the center of the furnace body 10. The furnace body 10 is made of a metal shell with thermal insulation and refractory materials attached.

[0021] The gas extraction device 20 is arranged in the furnace body 10, and is used for collecting the pyrolysis gas of garbage. The gas extraction device 20 has a conical top surface and a gas extraction port located on the inner wall of the conical top surface. The conical top surface is used to guide the garbage material to be distributed toward the inner wall of the furnace body 10; the gas extraction device 20 is installed at the center of the internal cross-section of the furnace body 10, and the gas extraction port is connected with the furnace body 10 to realize the function of collecting the pyrolysis gas.

[0022] The pipe assembly 30 is arranged in the furnace body 10, and a secondary combustion chamber is formed inside the pipe assembly 30. One end of the secondary combustion chamber is connected to the air intake port, and the other end extends to the outside of the furnace body 10 for the circulation of garbage pyrolysis gas; the pipe assembly 30 is made of non-metallic material.

[0023] The ignition device 40 can perform ignition. The ignition device 40 has an ignition end, which is arranged in the secondary combustion chamber and is used to burn the pyrolysis gas in the secondary combustion chamber.

[0024] The pyrolysis gas of garbage is collected through the gas extraction device 20 and enters the secondary combustion chamber. By turning on the ignition device 40, the ignition device 40 performs secondary combustion on the pyrolysis gas inside the secondary combustion chamber. The heat generated by the secondary combustion maintains the high temperature of the secondary combustion chamber, thereby achieving the cracking of harmful substances such as dioxins. The temperature of the pyrolysis gas after the secondary combustion is increased to above 900°C, preventing tar from solidifying and avoiding secondary pollution caused by tar.

[0025] The afterburner 50 is located on one side of the furnace body 10, and the afterburner 50 is connected with the secondary combustion chamber. The pyrolysis gas is introduced into the afterburner 50 via the secondary combustion chamber and the ignition device 40. The afterburner 50 is used to burn the incompletely burned combustible gas that flows into the afterburner 50 via the secondary combustion chamber; the air supply pipe is connected to the afterburner 50 and is used to provide oxygen inside the afterburner 50. The afterburner 50 is for the pyrolysis gas that passes through the secondary combustion chamber. Due to its own insufficient oxygen content, part of the combustible gas is not fully burned, and air needs to be supplemented for re-combustion. The air in the afterburner 50 comes from the garbage drying area inside the furnace body 10. The odor generated by the drying is decomposed and removed in the high temperature environment of the afterburner 50. At the same time, the supplemented air can appropriately reduce the temperature of the exhaust gas in the afterburner 50, which can better adapt to the subsequent heat exchange and exhaust gas treatment equipment.

[0026] The material distribution device 60 is disposed in the furnace body 10 and located above the gas extraction device 20, and is used for evenly distributing the garbage introduced through the material inlet.

[0027] The air supply device 70 has an inlet end and an outlet end. The inlet end is located outside the furnace body 10 and the outlet end is located inside the furnace body 10 for introducing air outside the furnace body 10 into the interior thereof.

[0028] Specifically, the air intake device 20 includes: an air intake window 21 , a crossbeam pipe 22 , a U-shaped cup 23 and a cloak 24 .

[0029] The air intake window 21 is arranged directly below the feed port, and is used for collecting and filtering the pyrolysis gas. The air intake port is provided in the air intake window 21. The air intake window 21 can be a cylinder with a shutter-type or a grid-type structure, which not only increases the air intake contact surface and improves the air intake efficiency, but also realizes the function of filtering the garbage pyrolysis gas. In this embodiment, the air intake window 21 is a cylinder with a grid-type structure.

[0030] The crossbeam pipe 22 is fixed in the material processing chamber, and one end of the crossbeam pipe 22 is fixed to and communicated with the air intake window 21 , so as to support and communicate with the air intake window 21 .

[0031] The U-shaped cup 23 is fixedly connected to the air intake window 21 and communicated with it, and the crossbeam pipe 22 is fixed and communicated with the air intake window 21 through the U-shaped cup 23; the crossbeam pipe 22 adopts two sections of pipe body, and the U-shaped cup 23 is arranged between the two sections of pipe body, one of the sections of the pipe body is communicated with the U-shaped cup 23, and the other end of the section of the pipe body is connected with the pipe assembly 30.

[0032] The upper part of the cloak 24 forms a conical top surface, and the cloak 24 is sleeved on the air intake window 21 and the upper part of the U-shaped cup 23 to shield the garbage material, prevent the garbage material from sticking to and blocking the air intake window 21, and guide the garbage material to be distributed toward the inner peripheral wall of the furnace body 10. The cloak 24 can prevent the garbage material from sticking to the air intake window 21, thereby improving the efficiency of extracting pyrolysis gas.

[0033] Specifically, the pipe assembly 30 includes: a vertical air duct 31 and a horizontal air duct 32. The vertical air duct 31 is arranged on the inner wall of the furnace body 10. The vertical air duct 31 is connected to one end of the crossbeam pipe 22. One end of the crossbeam pipe 32 is connected to an end of the vertical air duct 31 away from the crossbeam pipe 22. The other end of the crossbeam pipe 32 passes through the furnace body 10 and is connected to the afterburner chamber 50. A secondary combustion chamber is formed between the vertical air duct 31 and the crossbeam pipe 32. The vertical air duct 31 and the horizontal air duct 32 are both embedded in the inner wall of the furnace body 10. The cross section of the horizontal air duct 32 is larger than that of the vertical air duct 31. The horizontal air duct 32 assumes the function of the secondary combustion chamber to meet the need for the expansion of the pyrolysis gas after ignition. It is also to reduce the flow rate of the pyrolysis gas after the secondary combustion, so that it has a sufficiently long residence time in the horizontal air duct 32 to meet the time required for the decomposition of harmful substances such as dioxins. At the same time, the heat generated by the combustion of the pyrolysis gas in the secondary combustion chamber can pyrolyze the garbage. The horizontal air duct 32 surrounds the inner wall of the furnace body 10 for 7 / 8 or more times, and then passes through the furnace body 10 to communicate with the afterburner 50. The arrangement of the horizontal air duct 32 around the inner wall of the furnace body 10 is to allow the high-temperature gas to remain in the secondary combustion chamber for a certain period of time to fully crack harmful substances such as dioxins, and is also conducive to the introduction of part of the heat energy into the material processing chamber to improve the efficiency of garbage pyrolysis. The air supply volume is controlled by the air supply device 70 to achieve the natural stratification of the combustion, reduction, pyrolysis and drying of the garbage material in the material processing chamber.

[0034] Specifically, the ignition device 40 is disposed on the side wall of the furnace body 10, and the ignition end of the ignition device 40 passes through the furnace body 10 and extends to the inside of the connection between the vertical gas duct 31 and the horizontal gas duct 32. The ignition device 40 ignites the pyrolysis gas in the vertical gas duct 31 and the horizontal gas duct 32, that is, the horizontal gas duct 32 realizes the function of the second combustion chamber.

[0035] The pyrolysis gas collected by the gas extraction device 20 enters the transverse gas pipe 32 through the vertical gas pipe 31, and the ignition device 40 ignites the pyrolysis gas in the pipe at the starting point of the transverse gas pipe 32, that is, the transverse gas pipe 32 realizes the function of the secondary combustion chamber, which has the following advantages: first, the secondary combustion chamber does not have additional oxygen (air), and the temperature of the gas after secondary combustion will not be reduced due to the mixing of air at normal temperature; second, the high-temperature gas generated by the secondary combustion chamber bypasses the high-temperature combustion zone inside the furnace body 10 along the transverse gas pipe 32, which can maintain the high temperature state of the gas after secondary combustion for a sufficient time to fully crack dioxins and other harmful substances, and at the same time, the released heat energy can also be introduced into the furnace to improve the efficiency of garbage pyrolysis.

[0036] The material distribution device 60 is located below the upper cover plate. Specifically, the material distribution device 60 is arranged in the furnace body 10 and above the cloak 24, and is used to evenly distribute the garbage introduced through the feed port. The material distribution device 60 includes two sets of pulley assemblies 61, steel cables 62, rakes 63, connecting rods 64 and driving members 65. The two sets of pulley assemblies 61 are relatively rotatably connected in the furnace body 10, the steel cables 62 are sleeved on the pulleys of the two sets of pulley assemblies 61 and tensioned, the rakes 63 are arranged on the steel cables 62, the connecting rods 64 are connected to the axis of one set of pulley assemblies 61, and the driving member 65 is in transmission connection with the connecting rods 64, and is used to drive the connecting rods 64 to rotate. The connecting rod 64 is driven to rotate by the driving member 65, and the connecting rod 64 drives a group of pulley assemblies 61 to rotate. The steel cable 62 drives another group of pulley assemblies 61 to rotate as the group of pulley assemblies 61 rotates, so that the rake bar 63 is driven to move back and forth inside the furnace body 10 and above the cloak 24 through the steel cable 62, so as to achieve uniform distribution of garbage. The driving member 65 is a servo motor, a rotating wheel and a transmission belt, the rotating wheel is installed on the output shaft of the servo motor, and the transmission belt is sleeved on the outside of the rotating wheel and the connecting rod 64 and is tensioned.

[0037] Specifically, the air supply device 70 is arranged on one side of the furnace body 10 and the air outlet end of the air supply device 70 extends into the furnace body 10. The air outlet end of the air supply device 70 is located below the transverse air guide pipe 32. The air supply device 70 includes a blower and an air supply duct. The blower is arranged on one side of the furnace body 10. The output end of the blower is connected to one end of the air supply duct. The other end of the air supply duct passes through the furnace body 10 and extends into the interior thereof. The air supply duct is arranged around the inner wall of the furnace body. An air outlet is opened on the air supply duct so that the blower can transport air to the interior of the furnace body 10 through the air supply duct. By controlling the air supply volume, the garbage material is formed in the material processing chamber in four layers from bottom to top, namely, combustion, reduction, pyrolysis and drying. The temperature distribution in the furnace chamber decreases from bottom to top.

[0038] Specifically, the grate 80 is arranged inside the furnace body 10 and below the air supply duct. The grate 80 is a movable grate that can move back and forth in parallel in the material processing chamber. The moving distance does not exceed the distance between two grate bars on the grate. The frequency of the reciprocating movement can be adjusted to meet the needs of ash discharge. The grate 80 is a component for stacking garbage fuel and making it burn effectively.

[0039] Specifically, the ash hopper is arranged at the bottom of the furnace body 10 , and has an ash guide port and an ash inlet. The ash guide port is opened on one side of the ash hopper, and the ash inlet is opened on the upper part of the ash hopper and connected with the furnace body 10 . The ash inlet is located below the grate 80 .

[0040] When in use, garbage enters the furnace body 10 from the feed port, and the garbage generates pyrolysis gas in the furnace body 10 through the high temperature generated by the combustion of the garbage material above the grate 80 at the bottom of the material processing chamber. The gas extraction device 20 collects and filters the pyrolysis gas, and the pyrolysis gas enters the crossbeam pipe 22 through the U-shaped cup 23 and the gas extraction window 21. The pyrolysis gas entering the crossbeam pipe 22 passes through the vertical gas pipe 31 and the horizontal gas pipe 32, and the ignition device 40 is turned on. The ignition device 40 ignites and burns at the connection between the vertical gas pipe 31 and the horizontal gas pipe 32, and the pyrolysis gas inside the ignited second combustion chamber is ignited. The high-temperature gas travels along the inner wall of the furnace body 10 and then passes through the furnace body 10 into the afterburner chamber 50. The secondary combustion chamber can maintain the high temperature of the gas after the secondary combustion for a sufficient period of time to fully decompose dioxins and other harmful substances. At the same time, the released heat energy can also be introduced into the furnace body 10 to improve the efficiency of garbage pyrolysis. The interior of the afterburner chamber 50 is further burned by the pyrolysis gas from the inside of the furnace body 10 (the combustible gas remaining in the high-temperature hot gas after passing through the secondary combustion chamber), and the air supply pipe transports air to the inside of the afterburner chamber 50, and the interior of the afterburner chamber 50 further burns and removes the odor generated by garbage drying.

[0041] The composite garbage pyrolysis furnace is provided with an air intake device 20, a tube assembly 30, an ignition device 40, an afterburner 50, a material distribution device 60 and an air supply device 70. The garbage is pyrolyzed inside the furnace body 10, and the pyrolysis gas is collected through the air intake device 20. The conical top surface facilitates the guidance of the garbage material toward the inner wall of the furnace body 10 for distribution. The air intake port on the inner wall of the conical top surface facilitates the collection of the pyrolysis gas by the air intake device 20 and avoids the garbage from blocking the air intake port. After the pyrolysis gas enters the tube assembly 30, the pyrolysis gas runs toward the area with increased temperature in the furnace. The ignition device 40 burns the pyrolysis gas inside the tube assembly 30 to prevent tar from solidifying and avoid secondary pollution caused by tar. At the same time, by controlling the air supply device 70 to transport air into the furnace body 10, the working mechanism of the composite garbage pyrolysis furnace is realized to generate garbage pyrolysis gas, which is convenient for the pyrolysis of garbage in the furnace body 10 and the combustion of the pyrolysis gas by the ignition device 40 in the secondary combustion chamber, thereby increasing the composition of the combustible gas in the pyrolysis gas in the secondary combustion chamber. The temperature in the secondary combustion chamber can be made to reach the temperature required for cracking dioxins by the ignition device 40, and the temperature inside the furnace body 10 can be increased by heat transfer. The afterburner 50 can meet the complete combustion of garbage, and the air supply pipe can provide air to the inside of the afterburner 50. The garbage entering the furnace body 10 can be evenly distributed by the distribution device 60. In this composite garbage pyrolysis furnace, garbage can be evenly distributed in the furnace body 10, avoiding the blockage of the gas extraction device 20 by garbage and tar generated after the pyrolysis of garbage. The tar is cracked and will not solidify. The garbage has sufficient combustible components during the pyrolysis process and can be burned and maintained and cracked by combustion at the temperature required for dioxins.

[0042] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A composite garbage pyrolysis furnace, characterized in that: include: A furnace body, wherein a material processing cavity is formed inside the furnace body, and a feed port communicating with the material processing cavity is opened at the upper portion; A gas extraction device, which is arranged in the furnace body and is used to collect waste pyrolysis gas. The gas extraction device has a conical top surface and a gas extraction port located on the inner wall of the conical top surface. The conical top surface is used to prevent the waste material from sticking to and blocking the gas extraction port, and guide the waste material to be distributed toward the inner peripheral wall of the furnace body; A pipe assembly, the pipe assembly is arranged in the furnace body, a secondary combustion chamber is formed inside the pipe assembly, one end of the secondary combustion chamber is connected to the gas inlet, and the other end extends outside the furnace body for the circulation of garbage pyrolysis gas; An ignition device, the ignition device having an ignition end, the ignition end being arranged in the secondary combustion chamber and being used for burning the pyrolysis gas in the secondary combustion chamber; an afterburner, the afterburner being located at one side of the furnace body and being connected to the secondary combustion chamber, the pyrolysis gas being introduced into the afterburner via the secondary combustion chamber and an ignition device, the afterburner being used to burn the incompletely combustible gas flowing into the afterburner via the secondary combustion chamber; an air supply pipe being connected to the afterburner for providing oxygen to the afterburner; A material distribution device, which is arranged in the furnace body and above the gas extraction device, and is used for evenly distributing the garbage introduced through the feed port; An air supply device, the air supply device having an inlet end and an outlet end, the inlet end being located outside the furnace body, and the outlet end being located inside the furnace body, for introducing air outside the furnace body into the furnace body; The air extraction device comprises: An air intake window, which is arranged directly below the feed port and is used for collecting and filtering pyrolysis gas, and the air intake port is opened at the air intake window; A crossbeam pipeline, wherein the crossbeam pipeline is fixedly arranged in the material processing chamber, and one end of the crossbeam pipeline is fixed to and communicated with the air intake window, and is used for supporting and communicating with the air intake window; A U-shaped cup, the U-shaped cup is fixedly connected to the air intake window and communicated therewith, and the crossbeam pipeline is fixed and communicated with the air intake window through the U-shaped cup; A cloak, wherein the upper portion of the cloak forms a conical top surface, and the cloak is sleeved on the air intake window and the upper portion of the U-shaped cup, and is used to prevent the garbage material from adhering to and blocking the air intake window, and guide the garbage material to be distributed toward the inner peripheral wall of the furnace body; The tube assembly comprises: A vertical air duct and a horizontal air duct, wherein the vertical air duct is arranged on the inner wall of the furnace body, the vertical air duct is connected with one end of the cross beam duct, one end of the cross beam duct is connected with an end of the vertical air duct away from the cross beam duct, the other end of the cross beam duct passes through the furnace body and is connected with the afterburner chamber, and the secondary combustion chamber is formed between the vertical air duct and the cross beam duct.

2. A composite garbage pyrolysis furnace according to claim 1, characterized in that: The ignition device is arranged on the side wall of the furnace body, and the ignition end of the ignition device passes through the furnace body and extends to the inside of the connection between the vertical air duct and the horizontal air duct.

3. A composite garbage pyrolysis furnace according to claim 2, characterized in that: The distribution device is arranged above the cloak and is used for evenly distributing the garbage introduced through the feed inlet.

4. The composite garbage pyrolysis furnace according to claim 3, characterized in that: The material distribution device includes two groups of pulley assemblies, steel cables, rake bars, connecting rods and driving components. The two groups of pulley assemblies are connected to the furnace body for relative rotation. The steel cables are sleeved on the pulleys of the two groups of pulley assemblies and tensioned. The rake bars are arranged on the steel cables. The connecting rod is connected to the axis of one group of pulley assemblies. The driving component is connected to the connecting rod for driving the connecting rod to rotate.

5. The composite garbage pyrolysis furnace according to claim 4, characterized in that: The air supply device is arranged on one side of the furnace body and the air outlet end of the air supply device extends into the furnace body. The air outlet end of the air supply device is located below the transverse air duct. The air supply device includes a blower and an air supply duct. The blower is arranged on one side of the furnace body. The output end of the blower is connected to one end of the air supply duct. The other end of the air supply duct passes through the furnace body and extends into the interior thereof.

6. The composite garbage pyrolysis furnace according to claim 5, characterized in that: It also includes a grate, which is arranged inside the furnace body and below the air supply duct.

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