Kiln mixed heating method and mixed heating roller kiln

Abstract

The invention discloses a kiln mixed heating method and a mixed heating roller kiln, and belongs to the field of mixed heating kiln equipment.The method comprises the following steps that S1, feeding is conducted, specifically, materials are loaded into a sagger, and the sagger enters a preheating cavity of the kiln; s2, preheating is conducted, specifically, the temperature in the preheating cavity is increased to heat the saggar, the materials are heated and decomposed to generate smoke, and the smoke flows into an incineration cavity located above the preheating cavity through the preheating cavity; s3, heat feeding is conducted, specifically, smoke is ignited through the incineration cavity, the smoke is exhausted outwards through a smoke exhaust pipe on the incineration cavity after being combusted, and heat generated by smoke combustion is transmitted into the preheating cavity from the incineration cavity through a heat conduction layer between the incineration cavity and the preheating cavity to heat the saggar; and S4, segmented heating is conducted, specifically, the saggar moves forwards, the preheating cavity is heated segment by segment for a reaction, smoke discharging and heat feeding are conducted in each segment of the preheating cavity, smoke generated by material combustion can be directly discharged to the incineration cavity for combustion, heat generated by combustion is used for heating the materials, and energy consumption for heating the materials is reduced.

Description

Technical Field

[0001] The invention relates to the field of mixed heating kiln equipment, and in particular to a kiln mixed heating method and a mixed heating roller kiln. Background Art

[0002] With the development of new energy technology, lithium batteries are widely used in production and life. The key materials of lithium batteries are their positive and negative electrode materials. Among them, graphite, as the mainstream negative electrode material of lithium batteries, is widely used due to its excellent conductivity. When processing and manufacturing graphite negative electrodes, it is necessary to mix a certain amount of asphalt and other organic matter into the graphite powder for carbonization coating to improve the performance of the material after processing. After the graphite powder is coated with asphalt, in order to prevent it from oxidizing at high temperatures, it is necessary to fill it with inert nitrogen for protection. Under the protection of inert gas, it is electrically heated to make the temperature in the furnace reach above 1100°C, so as to promote the formation of carbon coating on the surface of the graphite. However, asphalt and other coating materials will produce a large amount of flammable organic gas when thermally decomposed at high temperature, which will pollute the environment. The above organic gas can be introduced into the flue gas incineration device through the exhaust pipe and then discharged after being fully burned to generate harmless gas. The existing smoke exhaust pipe has a long flow path. After long-term use, the pipe is easily clogged by asphalt tar. In addition, high-temperature asphalt tar and smoke are easy to seep out from the gaps in the pipe, which is prone to explosion hazard and has certain dangers. High-temperature smoke is usually discharged directly into the atmosphere, and the heat generated by the combustion of combustible smoke incineration devices is not effectively recovered and utilized, resulting in energy waste. Now, a heating method is needed that can quickly treat smoke and recover the heat of smoke combustion for material heating.

[0003] The existing patent with announcement number CN 211060632 U discloses a new type of waste heat recovery tunnel kiln, which includes a tunnel kiln, the tunnel kiln includes a preheating chamber, a high temperature chamber and a cooling chamber, the top of the cooling chamber is fixedly provided with a flue gas input pipe, the top of the flue gas input pipe is fixedly connected with a fan, and a waste heat recovery component is fixedly provided on one side of the fan; the waste heat recovery component includes a flue gas inlet provided at one end of the fan, the fan is fixedly connected with a waste heat boiler through a pipeline, an evaporator is provided on one side of the waste heat boiler, and a turbine generator set is provided above the evaporator, and a heat transfer medium input pipe is fixedly connected between the two, a condenser is provided on one side of the waste heat boiler, and a second return pipe is fixedly connected between the two. The heat after the flue gas incineration of the waste heat recovery tunnel kiln is not used to heat the materials in the kiln, resulting in high energy consumption. Summary of the invention

[0004] One of the purposes of the present invention is to provide a kiln mixed heating method, which solves the problem that the heat generated by the combustion flue gas during the heating of the existing kiln is not fully utilized to heat the materials in the kiln.

[0005] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention is as follows:

[0006] A kiln mixed heating method comprises the following steps:

[0007] S1. Feeding: taking materials and loading them into the sagger, and the sagger enters the preheating chamber of the kiln;

[0008] S2, preheating: the temperature in the preheating chamber is increased to heat the sagger, and the material is decomposed by the heat to generate smoke, and the smoke flows into the incineration chamber above the preheating chamber through the preheating chamber;

[0009] S3, heat feeding: the combustion chamber ignites the flue gas, and the flue gas is discharged outward through the exhaust pipe on the combustion chamber after combustion, and the heat generated by the combustion of the flue gas is transferred from the combustion chamber to the preheating chamber through the heat conductive layer between the combustion chamber and the preheating chamber to heat the sagger;

[0010] S4, segmented heating: the sagger moves forward, and the preheating chamber heats up step by step to react. In each segment, the preheating chamber exhausts smoke and supplies heat. The smoke generated by the combustion of the material can be directly discharged into the incineration chamber for combustion. The heat generated by the combustion is used to heat the material, reducing the energy consumption of heating the material.

[0011] Furthermore, in S1, the sagger undergoes gas replacement before entering the preheating chamber, and the sagger enters the preheating chamber under the protection of an inert gas to prevent air from affecting the burning of the material and the composition of the generated flue gas.

[0012] Furthermore, in S2, a first heating element is provided in the preheating chamber, and the first heating element is an electric heating element. The first heating element emits heat to heat the sagger, which is used to directly heat the material. The heating does not produce by-products, so that the composition of the generated flue gas is stable.

[0013] Furthermore, in S3, the heat generated in the combustion chamber is transferred to the preheating chamber through the heat-conducting layer in the form of heat radiation, and the smoke combustion will not have any adverse effect on the burning of the material.

[0014] The second purpose of the present invention is to provide a mixed heating roller kiln, which solves the problems of low heat utilization rate of flue gas in the existing roller kiln and easy clogging of pipelines by flue gas.

[0015] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention is as follows:

[0016] A mixed heating roller kiln is used to implement the kiln mixed heating method, comprising a flue gas incineration chamber and a heat preservation chamber, wherein the flue gas incineration chamber is connected to the heat preservation chamber, and comprises a furnace body, a preheating chamber, a combustion chamber, a heat conducting layer, a smoke inlet pipe and a smoke exhaust pipe, wherein the preheating chamber and the combustion chamber are both arranged in the furnace body, and the combustion chamber is arranged above the preheating chamber, and further comprises the heat conducting layer being arranged between the preheating chamber and the combustion chamber, the smoke inlet pipe connecting the preheating chamber and the combustion chamber, and the smoke exhaust pipe being arranged on a side wall of the combustion chamber, the smoke generated by the material directly enters the combustion chamber for harmless combustion treatment, and the heat generated by the combustion is transferred to the preheating chamber through the heat conducting layer to heat the material, thereby reducing the energy consumption of heating the material, and the smoke gas movement path is short and the exhaust is smooth, and it is not easy to block the internal pipeline.

[0017] Furthermore, a heat radiation plate is provided on the lower side wall of the heat-conducting layer, and the cross-section of the heat-conducting layer is configured to be corrugated to improve the efficiency of heat transfer.

[0018] Furthermore, it also includes a first heating element, which is arranged in the preheating chamber and is used to heat the material in sections, with rapid heating, accurate temperature control and uniform heat distribution.

[0019] Furthermore, it also includes a transmission mechanism and a roller rod, wherein the transmission mechanism is arranged on the side wall of the preheating chamber, the roller rod is rotatably connected in the preheating chamber, and the roller rod is connected to the transmission mechanism for conveying the sagger loaded with materials.

[0020] Furthermore, a partition is provided in the combustion chamber, and the partition divides the combustion chamber into two parts connected front and back, so that smoke can be fully burned and then discharged.

[0021] Preferably, it further includes a heat-insulating layer, which is arranged on the outer wall of the incineration chamber, and the heat-insulating layer and the heat-conducting layer are arranged to surround the incineration chamber to prevent heat leakage.

[0022] The beneficial effects of the present invention are:

[0023] (1) The mixed heating method of the kiln is to heat the sagger in stages by the preheating chamber, so that the materials in the sagger react and generate at high temperature. The smoke generated by the materials is directly discharged into the incineration chamber for combustion and conversion. The heat generated by the combustion of the smoke is transferred to the preheating chamber through the heat conductive layer for heating the materials. Electric heating and heat generated by the combustion of the smoke are recovered for heating, which eliminates smoke pollution and reduces energy consumption. The smoke flow path is short and is not easy to block the internal pipes, thereby reducing the difficulty of maintenance.

[0024] (2) The preheating chamber of the kiln mixed heating method is provided with a combustion chamber, which is arranged above the preheating chamber, and a heat-conducting layer is provided between the two chambers as a chamber wall. A smoke inlet pipe is provided between the preheating chamber and the combustion chamber. The organic smoke generated by the material in the preheating chamber is directly discharged into the combustion chamber through the smoke inlet pipe, and burns in the combustion chamber. The heat generated by the combustion is transferred to the preheating chamber below through the heat-conducting layer to heat the material in the preheating chamber, so that the heat generated by the smoke is effectively utilized. In addition, the smoke exhaust path is short, and the smoke inlet pipe is not easily clogged by smoke tar, thereby reducing the risk of smoke leakage. In addition, a first heating element is provided in the preheating chamber. The first heating element is an electric heating rod. Electric heating heats up quickly and there are no by-products produced by combustion. The smoke generated by the pyrolysis of the electrode material has simple components, and the products produced after the smoke is burned have low harm to the environment.

[0025] (3) The mixed heating roller kiln is provided with a flue gas combustion chamber and a heat preservation chamber, and the multiple flue gas combustion chambers are connected end to end to quickly discharge the flue gas generated by the heating electrode material to the combustion chamber. The exhaust path of the flue gas is short, and the flue gas will not flow to the heat preservation chamber. The heat generated by the flue gas can be used to preheat the electrode material, thereby reducing energy consumption. The heat preservation chamber is also provided with an electric heating element to achieve heat preservation of the electrode material. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A flow chart of the kiln mixed heating method provided by the present invention;

[0027] Figure 2 An elevation view of the hybrid heating roller kiln provided by the present invention;

[0028] Figure 3 This is a cross-sectional structural diagram of the flue gas incineration chamber provided by the present invention.

[0029] Reference numerals:

[0030] 1. Inlet replacement chamber; 2. Heating section; 21. First heating element; 22. Preheating chamber; 3. Smoke combustion chamber; 31. Insulation layer; 32. Furnace body; 33. Transmission mechanism; 331. Roller; 34. Gas input device; 35. Incineration chamber; 351. Smoke exhaust pipe; 352. Smoke inlet pipe; 36. Heat conducting layer; 37. Partition; 4. Insulation chamber; 41. Second heating element; 5. Cooling section; 6. Exit replacement chamber; 7. Sagger; 8. Smoke exhaust passage. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Embodiment 1

[0033] like Figure 1-Figure 3 As shown, this embodiment discloses a kiln mixed heating method, comprising the following steps:

[0034] S1. Feeding: taking materials and loading them into the sagger 7, which enters the preheating chamber 22 of the kiln. The sagger 7 is loaded with powdered materials;

[0035] S2, preheating: the temperature in the preheating chamber 22 is increased to heat the sagger 7, the material is decomposed by the heat to generate smoke, the smoke flows into the incineration chamber 35 above the preheating chamber 22 through the preheating chamber 22, the sagger 7 moves forward to absorb the heat in the preheating chamber 22 and then increases in temperature to reach the temperature of the material sintering reaction, the material reacts to generate and release smoke, and the smoke moves upward into the incineration chamber 35;

[0036] S3, heat feeding: the combustion chamber 35 ignites the flue gas, and after the flue gas is burned, it is discharged to the outside through the exhaust pipe 351 on the combustion chamber 35. The heat generated by the combustion of the flue gas is transferred from the combustion chamber 35 to the preheating chamber 22 through the heat conductive layer 36 between the combustion chamber 35 and the preheating chamber 22 to heat the sagger 7. The heat generated by the flue gas is transferred back to the preheating chamber 22, and the materials are mixed and heated in the preheating chamber 22, thereby reducing the energy consumption of heating the materials.

[0037] S4, segmented heating: the sagger 7 moves forward, and the preheating chamber 22 is heated up segment by segment to react. In each segment of the preheating chamber 22, smoke is exhausted and heat is supplied, and the temperature of the preheating chamber 22 is gradually increased. The material heating temperature is stable and the smoke is handled in time.

[0038] Furthermore, in S1 , the sagger 7 is subjected to gas replacement before entering the preheating chamber 22 , and the sagger 7 enters the preheating chamber 22 under the protection of inert gas to prevent the material from being oxidized at high temperature and to prevent the flue gas from mixing with the air to affect the combustion conditions.

[0039] Furthermore, in S2, a first heating element 21 is provided in the preheating chamber 22. The first heating element 21 is an electric heating element. The first heating element 21 emits heat to heat the sagger 7. The first heating element 21 is used to directly heat the material. The heating will not produce harmful gases that affect the smoke components generated by the material.

[0040] Preferably, in S3, the heat generated in the incineration chamber 35 is transferred to the preheating chamber 22 through the heat-conducting layer 36 in the form of heat radiation, and the heat transfer alone will not affect the sintering reaction of the material.

[0041] Embodiment 2

[0042] like Figure 2 and Figure 3 As shown, this embodiment discloses a mixed heating roller kiln, which is used to realize a mixed heating method of a kiln, including a flue gas combustion chamber 3 and a heat preservation chamber 4, the flue gas combustion chamber 3 is connected to the heat preservation chamber 4, the flue gas combustion chamber 3 includes a furnace body 32, a preheating chamber 22, a combustion chamber 35, a heat conducting layer 36, a smoke inlet pipe 352 and a smoke exhaust pipe 351, the preheating chamber 22 and the combustion chamber 35 are both arranged in the furnace body 32, the combustion chamber 35 is arranged above the preheating chamber 22, the preheating chamber 22 is used to heat the material, the heat conducting layer 36 is arranged between the preheating chamber 22 and the combustion chamber 35, and is used to prevent the products generated by the combustion of the flue gas from flowing back into the preheating chamber 22, and the smoke inlet pipe 352 and the smoke exhaust pipe 351 are arranged in the furnace body 32. The preheating chamber 22 and the incineration chamber 35 are connected. The smoke exhaust pipe 351 is arranged on a side wall of the incineration chamber 35. The smoke exhaust pipe 351 is connected to the outside to discharge the harmless gas generated after the combustion of the smoke into the atmosphere. The heat conductive layer 36 transfers the heat generated by the combustion of the smoke in the incineration chamber 35 to the preheating chamber 22 by radiation, and heats the material in the preheating chamber 22, thereby reducing the energy consumption of the preheating material. The smoke generated by the material heating directly flows into the incineration chamber 35, and the flow path of the smoke is short, which is not easy to be blocked. The smoke flows smoothly, which reduces the maintenance cost. The preheating chamber 22 after the smoke is burned reduces the power consumption by more than 15%.

[0043] The flue gas combustion chamber 3 is in the temperature rising section 2, and a second heating element 41 is provided in the insulation chamber 4. The second heating element 41 is used to accurately control the constant temperature of the sintering material.

[0044] Furthermore, it also includes an inlet replacement chamber 1, a cooling section 5 and an outlet replacement chamber 6. The inlet replacement chamber 1, the heating section 2, the insulation section and the outlet replacement chamber 6 are connected end to end in sequence, and multiple insulation chambers 4 are connected end to end to form an insulation section, wherein the inlet replacement chamber 1 can be connected to the preheating chamber 22, the inlet replacement chamber 1 and the outlet replacement chamber 6 are used to exhaust air when the material enters and exits the kiln, and the cooling section 5 is used to cool the sintered material.

[0045] Further,

[0046] The preheating chamber 22 and the combustion chamber 35 are integrally formed, thereby reducing the manufacturing cost.

[0047] Furthermore, a heat radiation plate is provided on the lower side wall of the heat conductive layer 36. The heat radiation plate generates heat through the combustion of flue gas and then emits infrared radiation to the preheating chamber 22 below, transferring heat by radiation to achieve heat transfer. The heat conductive layer 36 is made of high-temperature resistant alloy, has high bearing strength and can be made of a relatively thin thickness, which meets the construction strength while having high thermal conductivity efficiency.

[0048] Furthermore, a partition 37 is provided in the combustion chamber 35, and the partition 37 divides the combustion chamber 35 into two parts connected front and back. The smoke inlet pipe 352 is connected to the front half of the combustion chamber 35 for introducing smoke into the combustion, and the smoke exhaust pipe 351 is connected to the rear half of the combustion chamber 35 for exhausting the gas after the smoke combustion is completed. The partition 37 plays a role in delaying the circulation of smoke.

[0049] Furthermore, it also includes a transmission mechanism 33 and a roller 331. The transmission mechanism 33 is arranged on the side wall of the preheating chamber 22. The roller 331 is rotatably connected in the preheating chamber 22, and the roller 331 is connected to the transmission mechanism 33. The transmission mechanism 33 is used to drive the roller 331 to rotate, and the transmission mechanism 33 is sealed in the box to prevent the heat and gas in the preheating chamber 22 from leaking out. A plurality of rollers 331 are arranged at intervals in the preheating chamber 22, and are used to transport the sagger 7 containing the material, and the sagger 7 is stably transferred forward in the kiln.

[0050] Furthermore, it also includes a gas input device 34, which is connected to the preheating chamber 22 and is arranged on the side wall of the preheating chamber 22. The gas input device 34 leads inert nitrogen to the preheating chamber 22 to protect the material, thereby preventing the material from being oxidized during the heating reaction, thereby improving the yield of the sintered material.

[0051] Preferably, it also includes an insulation layer 31, which is arranged on the outer wall of the incineration chamber 35, and the insulation layer 31 and the heat-conducting layer 36 are arranged to surround the incineration chamber 35. The insulation layer 31 is used to prevent the heat generated by the combustion flue gas in the incineration chamber 35 from leaking out, thereby improving the utilization rate of the heat.

[0052] More preferably, a curved portion is provided on the smoke inlet pipe 352, and the outlet direction of the smoke inlet pipe 352 is arranged to be parallel to the length direction of the preheating chamber 22, so as to guide the smoke to be discharged after stable combustion.

[0053] More preferably, a burner, a combustion-supporting tube, a gas pipe and a smoke exhaust fan are also provided in the incineration chamber 35. The burner is used to ignite the flue gas, the combustion-supporting tube is used to input oxygen into the incineration chamber 35 to mix with the flue gas for combustion assistance, and the gas pipe is used to input gas to ensure that the flue gas combustion reaction is fully carried out, prevent insufficient combustion from producing harmful gases, and improve the effect of harmless flue gas treatment. The smoke exhaust fan is arranged in the smoke exhaust channel 8 to accelerate the discharge of gas; the burner is provided with an automatic ignition device, which can ignite automatically as needed, and the flue gas will burn automatically after ignition.

[0054] More preferably, the cross-section of the heat-conducting layer 36 is configured to be corrugated, and the corrugated plate surface increases the surface area for transferring radiant heat, thereby improving the efficiency of radiant heat transfer; the lower side wall of the heat-conducting layer 36 is provided with fins facing the preheating chamber 22 to increase the heat-conducting area.

[0055] More preferably, the first heating element 21 is an electric heating rod, which has the advantages of easy arrangement, high heating density and no generation of toxic gases during the heating process. The electric heating rod can be used here to allow the smoke generated by the pyrolysis of the material to enter the incineration chamber 35 for sufficient combustion; a protective cover is provided on the outside of the first heating element 21, and the protective cover is made of quartz to prevent smoke erosion.

[0056] More preferably, a smoke exhaust passage 8 is provided at the top of the incineration chamber 35, and the smoke exhaust pipe 351 is connected to the smoke exhaust passage 8 for exhausting the gas generated by the combustion to the outside.

[0057] Furthermore, a plurality of groups of preheating chambers 22 and combustion chambers 35 connected in sequence are provided in the flue gas incineration chamber 3. The preheating chambers 22 are connected end to end and are used to gradually increase the temperature of the sintered material from low to high. The combustion chambers 35 are independent of each other and separated by the insulation layer 31. Each combustion chamber 35 processes the flue gas in its corresponding preheating chamber 22 separately and feeds back heat to the preheating chamber 22, thereby preventing the flue gases from interfering with each other and improving the efficiency of the flue gas circulation.

[0058] The working process of the flue gas combustion chamber 3 is as follows:

[0059] The material is placed in the sagger 7, which is transported to the preheating chamber 22 by the roller 331. The first heating element 21 in the preheating chamber 22 gradually heats up the material. When the material in the sagger 7 is heated, it is thermally decomposed to produce organic smoke. The smoke enters the combustion chamber 35 through the smoke inlet pipe 352. The combustion chamber 35 ignites and burns the smoke. The heat generated by the combustion is transferred to the preheating chamber 22 through the heat conductive layer 36. The harmless gas generated after the smoke is burned is discharged into the exhaust channel 8 through the exhaust pipe 351 and discharged to the outside through the exhaust channel 8.

[0060] According to the disclosure and teaching of the above description, those skilled in the art to which the present invention belongs may also change and modify the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes of the present invention should also fall within the protection scope of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the present invention.

Claims

1. A kiln mixed heating method, characterized in that: The following steps are involved: S1. Feeding: taking materials and loading them into a sagger (7), and the sagger (7) enters the preheating chamber (22) of the kiln; S2, preheating: the temperature in the preheating chamber (22) is increased to heat the sagger (7), and the material is decomposed by the heat to generate smoke, and the smoke flows through the preheating chamber (22) into the incineration chamber (35) located above the preheating chamber (22); S3, heat feeding: the combustion chamber (35) ignites the flue gas, and after the flue gas is burned, it is discharged to the outside through the smoke exhaust pipe (351) on the combustion chamber (35), and the heat generated by the combustion of the flue gas is transferred from the combustion chamber (35) to the preheating chamber (22) through the heat conductive layer (36) between the combustion chamber (35) and the preheating chamber (22) to heat the sagger (7); S4, segmented heating: the sagger (7) moves forward, and the preheating chamber (22) heats up segment by segment to carry out the reaction, and smoke is exhausted and heat is supplied in each segment of the preheating chamber (22).

2. The kiln mixed heating method according to claim 1, characterized in that: In S1, the sagger (7) undergoes gas replacement before entering the preheating chamber (22), and the sagger (7) enters the preheating chamber (22) under the protection of an inert gas.

3. The kiln mixed heating method according to claim 2, characterized in that: In S2, a first heating element (21) is provided in the preheating chamber (22), wherein the first heating element (21) is an electric heating element, and the first heating element (21) emits heat to heat the sagger (7).

4. The kiln mixed heating method according to claim 2, characterized in that: In S3, the heat generated in the incineration chamber (35) is transferred to the preheating chamber (22) through the heat-conducting layer (36) in the form of heat radiation.

5. A mixed heating roller kiln, characterized in that: Used to implement the kiln mixed heating method described in any one of claims 1 to 4: comprising a flue gas combustion chamber (3) and an insulation chamber (4), wherein the flue gas combustion chamber (3) is connected to the insulation chamber (4), the flue gas combustion chamber (3) comprises a furnace body (32), a preheating chamber (22), a combustion chamber (35), a heat conducting layer (36), a smoke inlet pipe (352) and a smoke exhaust pipe (351), the preheating chamber (22) and the combustion chamber (35) are both arranged in the furnace body (32), the combustion chamber (35) is arranged above the preheating chamber (22), the heat conducting layer (36) is arranged between the preheating chamber (22) and the combustion chamber (35), the smoke inlet pipe (352) connects the preheating chamber (22) and the combustion chamber (35), and the smoke exhaust pipe (351) is arranged on a side wall of the combustion chamber (35).

6. The hybrid heating roller kiln according to claim 5, characterized in that: A heat radiation plate is provided on the lower side wall of the heat-conducting layer (36), and the cross-section of the heat-conducting layer (36) is configured to be corrugated.

7. The hybrid heating roller kiln according to claim 6, characterized in that: It also comprises a first heating element (21), wherein the first heating element (21) is arranged in the preheating chamber (22).

8. The hybrid heating roller kiln according to claim 5, characterized in that: It also includes a transmission mechanism (33) and a roller (331), wherein the transmission mechanism (33) is arranged on the side wall of the preheating chamber (22), the roller (331) is rotatably connected in the preheating chamber (22), and the roller (331) is connected to the transmission mechanism (33).

9. The hybrid heating roller kiln according to claim 5, characterized in that: A partition plate (37) is provided in the combustion chamber (35), and the partition plate (37) divides the combustion chamber (35) into two parts which are connected front and back.

10. The hybrid heating roller kiln according to claim 9, characterized in that: It also comprises a heat-insulating layer (31), the heat-insulating layer (31) being arranged on the outer wall of the incineration chamber (35), and the heat-insulating layer (31) and the heat-conducting layer (36) being arranged to surround the incineration chamber (35).

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