Flue gas incineration chamber and mixed heating roller kiln

Abstract

The invention discloses a flue gas incineration chamber and a mixed heating roller kiln, and belongs to the field of mixed heating kiln equipment.The flue gas incineration chamber comprises a furnace body, a preheating cavity and an incineration cavity, the preheating cavity and the incineration cavity are both arranged in the furnace body, the incineration cavity is arranged above the preheating cavity, and the flue gas incineration chamber further comprises a heat conduction layer, a smoke inlet pipe and a smoke exhaust pipe; the heat conduction layer is arranged between the preheating cavity and the incineration cavity, the smoke inlet pipe communicates with the preheating cavity and the incineration cavity, the smoke exhaust pipe is arranged on one side wall of the incineration cavity, and smoke generated in the preheating cavity directly enters the incineration cavity to be subjected to harmless combustion treatment. Heat generated by combustion is transmitted to the preheating cavity through the heat conduction layer to heat materials, energy consumption for heating the materials is reduced, the moving path of smoke is short, the smoke is discharged smoothly, and internal pipelines are not prone to being blocked.

Description

Technical Field

[0001] The invention relates to the field of mixed heating kiln equipment, and in particular to a flue gas combustion chamber 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 recycled, resulting in energy waste. Now there is a need for a device that has a short smoke treatment path and can recycle the heat of the smoke.

[0003] The existing patent with announcement number CN205316960U discloses an electric roller kiln, including a kiln body, a transmission mechanism, a feed roller, a discharge roller, a heating element, an air intake and exhaust system and an electronic control system. The feed roller is located at the front end of the kiln body, and the discharge roller is located at the rear end of the kiln body. The kiln body is divided into a preheating section, a sintering section and a cooling section. The preheating section, the sintering section and the cooling section are provided with an air intake pipe, and the preheating section and the cooling section are provided with an exhaust pipe, which is connected to the exhaust main pipe, and a temperature sensor is provided at the exhaust pipe. The kiln body includes a kiln shell, a furnace and a lining. The kiln shell is welded by steel plates and steel sections, the furnace is assembled by high-aluminum bricks, and the lining is built by mullite polylight bricks. The heat after the flue gas incineration of the electric roller kiln is not fully utilized. Summary of the invention

[0004] One of the purposes of the present invention is to provide a flue gas combustion chamber, which solves the problem that the heat of the flue gas combustion device of the existing kiln is not fully utilized.

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

[0006] A flue gas incineration chamber comprises a furnace body, a preheating chamber and a combustion chamber, 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. The chamber further comprises a heat conducting layer, a smoke inlet pipe and a smoke exhaust pipe, wherein the heat conducting layer is arranged between the preheating chamber and the combustion chamber, the smoke inlet pipe connects the preheating chamber and the combustion chamber, and the smoke exhaust pipe is arranged on a side wall of the combustion chamber. The smoke generated in the preheating chamber 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 for heating the material, and the smoke movement path is short and the exhaust is smooth, and it is not easy to block the internal pipeline.

[0007] Furthermore, a heat radiation plate is provided on the lower side wall of the heat conducting layer to improve the efficiency of heat transfer.

[0008] 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.

[0009] 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.

[0010] 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.

[0011] 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.

[0012] As a better option, the smoke inlet pipe is provided with a bending portion, and the outlet direction of the smoke inlet pipe is set to be parallel to the length direction of the preheating chamber, so as to delay the flow of smoke in the combustion chamber so that it can be fully burned.

[0013] More preferably, the cross section of the heat-conducting layer is configured to be corrugated to improve heat transfer efficiency.

[0014] As a better solution, the first heating element is an electric heating rod, which has high electric heating efficiency and accurate temperature control.

[0015] One of the purposes 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 leakage of flue gas generated by the reaction.

[0016] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention is as follows:

[0017] A mixed heating roller kiln comprises the above-mentioned flue gas combustion chamber and the insulation chamber, wherein the flue gas combustion chamber is connected to the insulation chamber, and the heat generated by the combustion of flue gas generated by material heating is fed back to the preheating chamber to heat the material, thereby reducing energy consumption.

[0018] The beneficial effects of the present invention are:

[0019] (1) A combustion chamber is provided on the preheating chamber of the flue gas incineration chamber. The combustion chamber 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 incineration chamber. The organic smoke generated by the material in the preheating chamber is directly discharged into the incineration chamber through the smoke inlet pipe, and burns in the incineration chamber. The heat generated by the combustion is transferred to the preheating chamber below through the heat-conducting layer, and the material in the preheating chamber is heated, 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.

[0020] (2) A first heating element is provided in the preheating chamber on the flue gas incineration chamber. The first heating element is an electric heating rod. The electric heating heats up quickly and produces no by-products. The flue gas produced by the pyrolysis of the electrode material has simple components, and the products produced after the flue gas is burned have low harm to the environment.

[0021] (3) The mixed heating roller kiln is provided with a flue gas combustion chamber and a heat preservation chamber. 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

[0022] Figure 1 An elevation view of the hybrid heating roller kiln provided by the present invention;

[0023] Figure 2 This is a cross-sectional structural diagram of the flue gas incineration chamber provided by the present invention.

[0024] Reference numerals:

[0025] 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

[0026] 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.

[0027] Embodiment 1

[0028] like Figure 1-Figure 2 As shown, this embodiment discloses a flue gas combustion chamber 3, including a furnace body 32, a preheating chamber 22 and a combustion chamber 35, 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, and also includes a heat conducting layer 36, a smoke inlet pipe 352 and a smoke exhaust pipe 351, 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 flue gas from flowing back into the preheating chamber 22, the smoke inlet pipe 352 connects the preheating chamber 22 and the combustion chamber 35, and the smoke exhaust pipe 351 is arranged The smoke exhaust pipe 351 is arranged on one side wall of the incineration chamber 35 and 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, so as to heat the material in the preheating chamber 22 and reduce the energy consumption of the preheating material. The smoke generated by the heating of the material directly flows into the incineration chamber 35. The flow path of the smoke is short and 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%.

[0029] The preheating chamber 22 and the combustion chamber 35 are integrally formed, thereby reducing the manufacturing cost.

[0030] 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.

[0031] Furthermore, it also includes a first heating element 21, which is arranged in the preheating chamber 22. The first heating element 21 is used to heat the material in the preheating chamber 22 to achieve temperature increase of the material. The first heating element 21 does not require a combustion reaction, and the heating amount does not produce toxic by-products. The temperature increases rapidly, and the temperature is accurately controlled, thereby improving the stability of the heated material.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] The working process of the flue gas combustion chamber 3 is as follows:

[0042] 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 the material. When the material in the sagger 7 is heated, it is decomposed by heat 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-conducting 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.

[0043] Embodiment 2

[0044] The present embodiment also discloses a mixed heating roller kiln, comprising 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 is in a heating section 2. A second heating element 41 is provided in the heat preservation chamber 4. The second heating element 41 is used to accurately control the constant temperature of the sintering material.

[0045] 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.

[0046] Preferably, it also includes an inlet displacement chamber 1, a cooling section 5 and an outlet displacement chamber 6. The inlet displacement chamber 1, the heating section 2, the insulation section and the outlet displacement 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 displacement chamber 1 can be connected to the preheating chamber 22, the inlet displacement chamber 1 and the outlet displacement 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.

[0047] 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 flue gas incineration chamber, comprising a furnace body (32), a preheating chamber (22) and an incineration chamber (35), wherein the preheating chamber (22) and the incineration chamber (35) are both arranged in the furnace body (32), and the incineration chamber (35) is arranged above the preheating chamber (22), characterized in that: It also includes a heat-conducting layer (36), a smoke inlet pipe (352) and a smoke exhaust pipe (351), wherein the heat-conducting layer (36) is arranged between the preheating chamber (22) and the incineration chamber (35), the smoke inlet pipe (352) connects the preheating chamber (22) and the incineration chamber (35), and the smoke exhaust pipe (351) is arranged on a side wall of the incineration chamber (35).

2. The flue gas incineration chamber according to claim 1, characterized in that: A heat radiation plate is provided on the lower side wall of the heat conducting layer (36).

3. The flue gas incineration chamber according to claim 2, characterized in that: It also comprises a first heating element (21), wherein the first heating element (21) is arranged in the preheating chamber (22).

4. The flue gas incineration chamber according to claim 3, 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).

5. The flue gas incineration chamber according to claim 4, 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.

6. The flue gas incineration chamber according to claim 5, 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).

7. The flue gas incineration chamber according to claim 1, characterized in that: The smoke inlet pipe (352) is provided with a bent portion, and the outlet direction of the smoke inlet pipe (352) is arranged to be parallel to the length direction of the preheating chamber (22).

8. The flue gas incineration chamber according to claim 1, characterized in that: The cross section of the heat conducting layer (36) is configured to be corrugated.

9. The flue gas incineration chamber according to claim 3, characterized in that: The first heating element (21) is an electric heating rod.

10. A mixed heating roller kiln, characterized in that: It comprises the flue gas incineration chamber and the insulation chamber (4) as described in any one of claims 1 to 9, wherein the flue gas incineration chamber is connected to the insulation chamber (4).

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