Heating device capable of being used repeatedly and roller kiln
By designing a segmented heating and waste heat recovery device during the lithium battery material sintering process, the problems of gas damage to equipment and high energy consumption during high-temperature sintering were solved, achieving efficient flue gas treatment and energy utilization.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-12
- Publication Date
- 2026-03-17
AI Technical Summary
The tar-containing gases generated during the high-temperature sintering process of existing lithium battery anode materials and lithium iron phosphate materials damage the refractory materials and heating elements in the furnace. Furthermore, flue gas treatment requires additional energy consumption, quartz tubes or ceramic tubes are prone to breakage, heating elements are easily unprotected, and flue gas treatment furnaces need to have their own heating systems, resulting in high energy consumption.
Design a multi-functional heating device, including a segmented heating mechanism, an incineration mechanism, and a waste heat recovery mechanism. The high-temperature gas generated by the burner heats the radiant tube, the high-temperature gas is recovered and used in the incineration mechanism to treat harmful flue gas, and the waste heat recovery mechanism uses the unused heat to preheat the protective gas, thereby improving thermal efficiency and resource utilization.
It improves the thermal efficiency of heating and sintering, reduces energy consumption, achieves the harmless treatment of harmful flue gas, avoids equipment damage, saves energy consumption, and conforms to the concept of energy conservation.
Smart Images
Figure CN224004192U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of new energy material production technology, specifically to a heating device and roller kiln that can be used in multiple ways. Background Technology
[0002] Due to the complex composition of raw materials, lithium-ion battery anode materials and lithium iron phosphate materials generate tar-containing gases mixed with various hydrocarbon components during high-temperature sintering. These gases have strong adhesive properties and can damage the refractory materials and heating elements within the furnace. A common practice is to add a layer of quartz or ceramic tube outside the electric heating element for protection. Additionally, the mixed gas needs to be extracted from the kiln and sent to a specialized treatment furnace for incineration, where the combustible components are burned into water and harmless gases such as carbon oxides and nitrogen oxides, which are then released into the atmosphere. In actual production, due to the adhesion and permeation corrosion of volatiles, quartz or ceramic tubes are prone to breakage after a period of use, subsequently causing the heating elements to break due to lack of protection, leading to production inconvenience. The flue gas treatment furnace also needs its own heating system (electric heating or burner heating) to heat the furnace to a certain temperature to achieve flue gas combustion conditions, a process that consumes a significant amount of energy. Therefore, it is necessary to introduce equipment that can harmlessly treat harmful flue gases in the working environment of lithium-ion battery material sintering, improve heating efficiency, and save on heating energy consumption. Utility Model Content
[0003] This utility model provides a heating device and roller kiln that can be used in multiple ways. By setting heating mechanisms in sections in the kiln furnace, setting incineration mechanisms that can treat harmful flue gas in a harmless manner, and setting waste heat recovery mechanisms that can recover high-temperature gas that is not fully utilized in the heating mechanisms and can transport the recovered high-temperature gas to the incineration mechanism for secondary utilization, the problems in the prior art mentioned above are solved.
[0004] In a first aspect, this utility model provides a multi-functional heating device, including a heating mechanism, a combustion mechanism, and a waste heat recovery mechanism. The heating mechanism is installed in sections within the kiln chamber enclosed by the inner wall of the kiln body. The waste heat recovery mechanism is connected to the heating mechanism and the combustion mechanism. The heating mechanism includes a base mounted on the kiln body, a burner disposed in a first inner cavity enclosed by the inner wall of the base, and a radiant tube disposed on the side of the base facing the kiln chamber. The burner can ignite combustion gas, and the generated high-temperature gas can flow to the radiant tube, which can heat the kiln chamber. The second inner cavity, enclosed by the inner wall, communicates with the first inner cavity. The incineration mechanism includes a furnace body, a heater disposed within the incineration chamber enclosed by the inner wall of the furnace body, an exhaust duct communicating with the incineration chamber, and a first fan disposed at one end of the exhaust duct. The heater is capable of heating the incineration chamber. The waste heat recovery mechanism includes a main pipe, a first pipe communicating with the first inner cavity, a second pipe communicating with the incineration chamber, and a second fan disposed at one end of the main pipe. Both the first and second pipes are connected to the main pipe. High-temperature gas in the first inner cavity enters the incineration chamber sequentially through the first pipe, the main pipe, and the second pipe. The first and second fans are capable of distributing the high-temperature gas to different areas for utilization.
[0005] Preferably, the burner is equipped with a gas pipe and a combustion-supporting air pipe, both of which pass through the first inner cavity from the outside and communicate with the interior of the burner. The gas pipe is used to inject gas into the burner, and the combustion-supporting air pipe is used to inject air into the burner for combustion support. By setting independent gas pipes and combustion-supporting air pipes, the burner can precisely adjust the gas flow rate and air flow rate, maintain a suitable air-fuel ratio, ensure sufficient reaction between gas and air, and improve thermal efficiency.
[0006] Preferably, the burner is equipped with a burner sleeve on the side facing the kiln chamber. The burner sleeve is located in the second inner cavity. The burner sleeve can guide the high-temperature gas generated by the burner into the second inner cavity. After being heated by the high-temperature gas in the second inner cavity, the radiant tube can radiate heat into the kiln chamber. By setting the burner sleeve, the high-temperature gas can be directionally injected into the second inner cavity to heat the radiant tube, further improving thermal efficiency, while also preventing the high-temperature gas from contaminating the protective atmosphere of the kiln chamber.
[0007] Preferably, the furnace body is equipped with an exhaust duct and a combustion-supporting gas pipe, both of which are connected to the incineration furnace. The exhaust duct is used to guide harmful gases generated in the kiln furnace to the incineration furnace, and the combustion-supporting gas pipe is used to inject air into the incineration furnace for combustion support. By setting independent exhaust ducts and combustion-supporting gas pipes, the incineration mechanism can precisely control the amount of flue gas and air entering the incineration furnace, ensuring the harmless treatment of harmful gases.
[0008] Preferably, a third pipe is provided between the exhaust duct and the main duct. The third pipe is connected to both the main duct and the exhaust duct. The high-temperature gas recovered from the main duct can enter the exhaust duct through the third pipe to provide anti-condensation heating for the harmful gases guided to the incinerator. By providing the third pipe, the waste heat recovery mechanism can insulate the exhaust duct, preventing tar in the flue gas from depositing inside the exhaust duct upon cooling. The flue gas can then be drawn into the incinerator by the first fan.
[0009] Preferably, the waste heat recovery mechanism further includes a heat exchanger, which is fitted onto the end of the main pipeline near the second fan. The heat exchanger is used to recover the heat of the high-temperature gas in the heat exchange section of the main pipeline into the heat exchanger. By setting up the heat exchanger, the waste heat recovery mechanism can transfer the unused heat in the high-temperature gas to the heat exchanger for temporary storage before it is drawn to the external environment by the second fan.
[0010] Preferably, the heat exchanger includes a cold gas pipe and a hot gas pipe, both of which are connected to the heat exchange section. The cold gas pipe is used to inject gas into the heat exchange section for heating, and the hot gas pipe is used to lead out the heated gas from the heat exchange section. By providing cold and hot gas pipes connected to the heat exchange section, the heat exchanger can preheat the protective gas to be injected into the kiln furnace, reducing the impact of colder gas on the kiln furnace temperature and saving energy required for heating.
[0011] A second aspect of this utility model provides a roller kiln, comprising a kiln body and a multi-functional heating device provided in any implementation of the first aspect. The kiln body includes a flue gas section, a high-temperature section, and a cooling section. The kiln chamber enclosed by the inner wall of the kiln body includes a first chamber, a second chamber, and a third chamber. The heating mechanism is installed in sections in the first chamber enclosed by the inner wall of the flue gas section and in the second chamber enclosed by the inner wall of the high-temperature section. The first pipe communicates with the first inner cavity enclosed by the inner wall of the base of the heating mechanism installed in the high-temperature section.
[0012] Preferably, the furnace body is equipped with an exhaust duct and a combustion-supporting gas pipe, both of which are connected to the combustion chamber. The exhaust duct guides harmful gases generated in the kiln chamber to the combustion chamber, and the combustion-supporting gas pipe injects air into the combustion chamber for combustion support. An exhaust branch pipe is provided between the exhaust duct and the exhaust section, and the exhaust branch pipe is connected to the first furnace chamber. By providing the exhaust branch pipe, the flue gas generated in the exhaust section can be directly injected into the incineration mechanism for harmless treatment.
[0013] Preferably, the waste heat recovery mechanism includes a heat exchanger, which is fitted onto the end of the main pipeline near the second fan. The heat exchanger has a cold gas pipe and a hot gas pipe, both of which are connected to the heat exchange section of the main pipeline within the heat exchanger. A protective gas pipe is provided on one side of the hot gas pipe. The protective gas pipe passes through the exhaust section, the high-temperature section, and the cooling section, and is connected to a third furnace formed by the inner walls of the first furnace, the second furnace, and the cooling section. The protective gas pipe is used to inject heated protective gas into the kiln furnace. By providing the protective gas pipe, the heat exchanger can inject preheated protective gas into the kiln furnace, maintaining the gas atmosphere required for sintering lithium battery materials in the roller kiln.
[0014] Compared with the prior art, the beneficial effects of this utility model are:
[0015] 1. In this utility model, the heating mechanism of the flue gas section works in conjunction with the heating mechanism of the high temperature section to heat the furnace chamber of the kiln. The high temperature gas generated by the combustion of the gas in the burner can be injected into the second inner cavity through the burner sleeve and heat the radiant tube. At the same time, the high temperature gas flows into the first inner cavity and the heated radiant tube can radiate heat to the furnace chamber of the kiln. The high temperature gas in the first inner cavity of the high temperature section can be recovered by the waste heat recovery mechanism. This design greatly improves the thermal efficiency of heating and sintering, and the high temperature gas carrying waste heat can be centrally recovered, improving the utilization rate of resources.
[0016] 2. In this utility model, the harmful flue gas generated after sintering lithium battery materials in the kiln furnace is transported to the incineration furnace through the exhaust duct. The high-temperature gas collected in the first inner cavity is drawn to the main pipeline and then transported to the incineration furnace and exhaust duct through the second and third pipelines respectively for heat replenishment and anti-condensation heating. This design enables the recovered high-temperature gas to participate in increasing the temperature of the incineration furnace and ensuring the flow of flue gas, reducing energy consumption and eliminating safety hazards. On the other hand, the incineration furnace can perform flue gas denitrification on the harmful flue gas, realizing the harmless treatment of the flue gas.
[0017] 3. This utility model is also equipped with a heat exchanger and a protective gas pipe. The heat exchanger can heat the protective gas required for sintering lithium battery materials in the furnace chamber, realizing the secondary utilization of high-temperature gas, while avoiding the frequent heat loss and furnace chamber temperature drop caused by injecting protective gas lower than the furnace chamber temperature, thus further reducing energy consumption and conforming to the concept of energy conservation. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:
[0019] Figure 1 This is a schematic diagram of the overall structure of a heating device that can be used in multiple ways, as provided by this utility model.
[0020] Figure 2 This is a schematic diagram of the heating mechanism in a multi-functional heating device provided by this utility model.
[0021] Figure 3 This is a schematic diagram of the overall structure of a multi-functional heating device provided by this utility model from another perspective.
[0022] Figure 4 This is a schematic diagram of the overall structure of a roller kiln provided by this utility model.
[0023] In the diagram: 1. Kiln body; 10. Kiln chamber; 11. Exhaust section; 110. First furnace chamber; 12. High-temperature section; 120. Second furnace chamber; 13. Cooling section; 130. Third furnace chamber;
[0024] 2. Heating mechanism; 21. Base; 210. First inner cavity; 22. Burner; 221. Gas pipe; 222. Combustion air duct; 223. Burner sleeve; 23. Radiant tube; 230. Second inner cavity;
[0025] 3. Incineration mechanism; 31. Furnace body; 310. Incineration furnace; 32. Heater; 33. Exhaust duct; 34. First blower; 35. Smoke exhaust duct; 351. Smoke exhaust branch pipe; 36. Combustion gas pipe;
[0026] 4. Waste heat recovery mechanism; 41. Main pipeline; 410. Heat exchange section; 42. First pipeline; 43. Second pipeline; 44. Second fan; 45. Third pipeline; 46. Heat exchanger; 461. Cold air pipe; 462. Hot air pipe; 463. Protective gas pipe. Detailed Implementation
[0027] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0028] In the description of this utility model, it should be noted that the terms "center," "middle," "upper," "lower," "left," "right," "inner," "outer," "top," "bottom," "side," "vertical," and "horizontal," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "a," "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0030] For purposes of simplicity and illustration, the principles of the embodiments are described primarily by way of example. In the following description, numerous specific details are set forth to provide a thorough understanding of the embodiments. However, it will be apparent to those skilled in the art that these embodiments may not be limited to these specific details in practice. In some instances, well-known methods and structures have not been described in detail to avoid unnecessarily obscuring these embodiments. Furthermore, all embodiments can be used in combination with each other.
[0031] Example 1
[0032] Please see Figures 1 to 3This utility model provides a multi-functional heating device, including a heating mechanism 2, a combustion mechanism 3, and a waste heat recovery mechanism 4. The heating mechanism 2 is installed in sections within the kiln chamber 10 formed by the inner wall of the kiln body 1. The waste heat recovery mechanism 4 is connected to the heating mechanism 2 and the combustion mechanism 3. The heating mechanism 2 includes a base 21 installed on the kiln body 1, a burner 22 disposed in a first inner cavity 210 formed by the inner wall of the base 21, and a radiant tube 23 disposed on the side of the base 21 facing the kiln chamber 10. The burner 22 can ignite the combustion gas, and the generated high-temperature gas can flow to the radiant tube 23, which can heat the kiln chamber 10. The second inner cavity 230 formed by the inner wall of the radiant tube 23 is connected to the first inner cavity 210. The combustion mechanism 3 includes a furnace body 31, a heater 32 disposed within the combustion chamber 310 enclosed by the inner wall of the furnace body 31, an exhaust duct 33 connected to the combustion chamber 310, and a first fan 34 disposed at one end of the exhaust duct 33. The heater 32 is capable of heating the combustion chamber 310. The waste heat recovery mechanism 4 includes a main pipe 41, a first pipe 42 connected to the first inner cavity 210, a second pipe 43 connected to the combustion chamber 310, and a second fan 44 disposed at one end of the main pipe 41. The first pipe 42 and the second pipe 43 are both connected to the main pipe 41. High-temperature gas in the first inner cavity 210 enters the combustion chamber 310 sequentially through the first pipe 42, the main pipe 41, and the second pipe 43. The first fan 34 and the second fan 44 are capable of distributing the high-temperature gas to different areas for utilization.
[0033] During the sintering process of lithium battery materials, the heating mechanism 2 needs to heat the furnace chamber 10 to 800℃-900℃ through the high-temperature gas in the second inner cavity 230 via the radiation tube 23, and the residual heat of the high-temperature gas flowing into the first inner cavity 210 is 600℃-800℃.
[0034] Please see Figure 2 The burner 22 is equipped with a gas pipe 221 and a combustion air duct 222. Both the gas pipe 221 and the combustion air duct 222 pass through the first inner cavity 210 from the outside and communicate with the interior of the burner 22. The gas pipe 221 is used to inject gas into the burner 22, and the combustion air duct 222 is used to inject air into the burner 22 for combustion support. By setting independent gas pipes 221 and combustion air ducts 222, the burner 22 can precisely adjust the gas flow rate and air flow rate, maintain a suitable air-fuel ratio, ensure that the gas and air react fully, and improve thermal efficiency.
[0035] Specifically, at the end of the burner 22 away from the radiant tube 23, a gas pipe 221 and a combustion air duct 222 are installed. The gas pipe 221 passes through the first inner cavity 210 from the outside and communicates with the combustion chamber inside the burner 22. Gas can be delivered to the combustion chamber inside the burner 22 through the gas pipe 221 and participate in combustion. The combustion air duct 222 passes through the first inner cavity 210 from the outside and communicates with the combustion chamber inside the burner 22. External air can be delivered to the combustion chamber inside the burner 22 through the combustion air duct 222 and participate in combustion. During operation, gas and air are supplied to the combustion chamber inside the burner 22 through the gas pipe 221 and the combustion air duct 222. The gas flow rate and air flow rate are adjusted through the gas pipe 221 and the combustion air duct 222 to maintain a suitable air-fuel ratio. The burner 22 ignites the mixture in the combustion chamber, and the gas is burned at the burner 22 to generate high-temperature gas.
[0036] Please see Figure 2 A burner sleeve 223 is provided on the side of the burner 22 facing the kiln chamber 10. The burner sleeve 223 is located in the second inner cavity 230. The burner sleeve 223 can guide the high-temperature gas generated by the burner 22 to the second inner cavity 230. After being heated by the high-temperature gas in the second inner cavity 230, the radiant tube 23 can radiate heat to the kiln chamber 10. By setting the burner sleeve 223, the high-temperature gas can be directionally injected into the second inner cavity 230 to heat the radiant tube 23, further improving the thermal efficiency, while also preventing the high-temperature gas from contaminating the protective atmosphere of the kiln chamber 10.
[0037] Specifically, one end of the burner sleeve 223 is aligned with the combustion chamber inside the burner 22, and the other end is provided with a nozzle 2231 aligned with the inner wall of the radiant tube 23 away from the burner 22. The space enclosed by the inner wall of the burner sleeve 223 is connected to the second inner cavity 230 at the nozzle 2231. The high-temperature gas generated after the burner 22 burns the gas flows toward the nozzle 2231, passes through the space enclosed by the inner wall of the burner sleeve 223, and flows into the second inner cavity 230 at the nozzle 2231. Then the high-temperature gas flows toward the burner 22, passes through the second inner cavity 230, and flows into the first inner cavity 210. The radiant tube 23 is made of corrosion-resistant alloy steel. During operation, the high-temperature gas generated by the burner 22 passes through the space enclosed by the inner wall of the burner sleeve 223 and is injected into the second inner cavity 230 through the nozzle 2231. While the high-temperature gas flows in the second inner cavity 230, it heats the tube wall of the radiant tube 23. The heated radiant tube 23 can radiate heat to the furnace chamber 10, thereby heating the furnace chamber 10. Finally, the high-temperature gas flows into the first inner cavity 210 and waits for the waste heat recovery mechanism 4 to recover it.
[0038] Please see Figure 1 and Figure 3The furnace body 31 is equipped with an exhaust duct 35 and a combustion-supporting gas pipe 36, both of which are connected to the incineration furnace 310. The exhaust duct 35 is used to guide the harmful gases generated in the kiln furnace 10 to the incineration furnace 310, and the combustion-supporting gas pipe 36 is used to inject air into the incineration furnace 310 for combustion support. By setting independent exhaust ducts 35 and combustion-supporting gas pipes 36, the incineration mechanism 3 can precisely control the amount of flue gas and air entering the incineration furnace 310, ensuring the harmless treatment of harmful gases.
[0039] Specifically, at one end of the furnace body 31, a flue gas duct 35 and a combustion gas pipe 36 are provided. Both the flue gas duct 35 and the combustion gas pipe 36 are connected to the incineration furnace 310. The harmful flue gas generated after the high-temperature sintering of lithium battery materials in the kiln furnace 10 can be transported to the incineration furnace 310 through the flue gas duct 35, and external air can be transported to the incineration furnace 310 through the combustion gas pipe 36 to participate in the decomposition of harmful flue gas. During operation, harmful flue gas and air are supplied to the incinerator 310 through the exhaust duct 35 and the combustion gas pipe 36. The flue gas flow rate and air flow rate are adjusted through the exhaust duct 35 and the combustion gas pipe 36 to maintain a suitable air-fuel ratio. After the heater 32 heats the incinerator 310 to the ignition point of the flue gas, the flue gas can be burned in the incinerator 310, and the harmful flue gas is converted into harmless exhaust gas. In the above process, due to the presence of the waste heat recovery mechanism 4, the high-temperature gas in the first inner cavity 210 enters the incinerator 310 in sequence through the first pipe 42, the main pipe 41, and the second pipe 43 under the action of the first fan 34 and the second fan 44, participating in increasing the temperature of the incinerator 310 and saving energy consumption.
[0040] Please see Figure 1 and Figure 3 A third pipe 45 is provided between the exhaust duct 35 and the main pipe 41. The third pipe 45 is connected to the main pipe 41 and the exhaust duct 35. The high-temperature gas recovered by the main pipe 41 can enter the exhaust duct 35 through the third pipe 45 to provide anti-condensation heating for the harmful gases guided to the incinerator 310. By setting the third pipe 45, the waste heat recovery mechanism 4 can insulate the exhaust duct 35, preventing tar in the flue gas from depositing inside the exhaust duct 35 when it cools down. The flue gas can be smoothly drawn to the incinerator 310 by the first fan 34.
[0041] Specifically, a third pipe 45 is installed between the exhaust duct 35 and the main pipe 41, connecting the exhaust duct 35 and the main pipe 41. High-temperature gas in the first inner cavity 210 can sequentially enter the exhaust duct 35 through the first pipe 42, the main pipe 41, and the third pipe 45, thus insulating the exhaust duct 35. During operation, the high-temperature gas in the first inner cavity 210, under the action of the first fan 34 and the second fan 44, sequentially enters the exhaust duct 35 through the first pipe 42, the main pipe 41, and the third pipe 45, insulating the exhaust duct 35 and preventing tar in the harmful flue gas from condensing at the exhaust duct 35. This avoids the risk of tar burning inside the exhaust duct 35 during dry burning, which could damage the exhaust duct 35.
[0042] Please see Figure 3 The waste heat recovery mechanism 4 also includes a heat exchanger 46, which is installed at one end of the main pipe 41 near the second fan 44. The heat exchanger 46 is used to recover the heat of the high-temperature gas in the heat exchange section 410 of the main pipe 41 to the heat exchanger 46. By setting up the heat exchanger 46, the waste heat recovery mechanism 4 can transfer the unused heat in the high-temperature gas to the heat exchanger 46 for temporary storage before the high-temperature gas in the waste heat recovery mechanism 4 is drawn to the external environment by the second fan 44.
[0043] Specifically, the heat exchanger 46 is configured with an internal hollow channel. The heat exchanger 46 is connected to the end of the main pipe 41 near the second fan 44 via the hollow channel. The section of the main pipe 41 in contact with the hollow channel serves as the heat exchange section 410. Before being drawn to the external environment by the second fan 44, the high-temperature gas can transfer its remaining heat to the heat exchanger 46 at the heat exchange section 410. During operation, the high-temperature gas in the first inner cavity 210 is drawn to the main pipe 41 by the second fan 44, and then to the combustion unit 3 by the first fan 34 for secondary utilization. The high-temperature gas in the main pipe 41 that is not drawn to the combustion unit 3 flows into the heat exchanger 46 under the action of the second fan 44 and temporarily stores its remaining heat in the heat exchange section 410. Finally, the high-temperature gas is discharged under the action of the second fan 44.
[0044] Please see Figure 3 The heat exchanger 46 is equipped with a cold gas pipe 461 and a hot gas pipe 462, both of which are connected to the heat exchange section 410. The cold gas pipe 461 is used to inject gas into the heat exchange section 410 for heating, and the hot gas pipe 462 is used to lead out the heated gas from the heat exchange section 410. By setting up the cold gas pipe 461 and hot gas pipe 462 connected to the heat exchange section 410, the heat exchanger 46 can preheat the protective gas to be injected into the kiln furnace 10, reducing the impact of colder gas on the temperature of the kiln furnace 10, and also saving the energy required for heating.
[0045] Specifically, at the bottom of the heat exchanger 46, a cold air pipe 461 and a hot air pipe 462 are provided. The cold air pipe 461 passes through the heat exchanger 46 from the outside and is connected to the heat exchange section 410. Gas with a temperature lower than that of the heat exchanger 46 can be transported to the heat exchange section 410 through the cold air pipe 461. The heat exchanger 46 uses the heat recovered from the high-temperature gas to heat the gas in the heat exchange section 410. The hot air pipe 462 passes through the heat exchanger 46 from the outside and is connected to the heat exchange section 410. The heated gas can leave the heat exchange section 410 through the hot air pipe 462 and be put into production. During operation, the protective gas required for sintering lithium battery materials in the furnace chamber 10 of the kiln is injected into the heat exchange section 410 through the cold gas pipe 461. The heat exchanger 46 heats the protective gas required for sintering lithium battery materials in the furnace chamber 10 of the kiln in the heat exchange section 410. The heated gas required for sintering lithium battery materials in the furnace chamber 10 of the kiln is then led out through the hot gas pipe 462, so that the protective gas without damaging the thermal field of the furnace chamber 10 can be obtained.
[0046] The working principle of the reusable heating device:
[0047] 1. Gas pipe 221 and combustion air pipe 222 supply gas and air to the combustion chamber inside burner 22. The gas flow rate and air flow rate are adjusted by gas pipe 221 and combustion air pipe 222 to maintain a suitable air-fuel ratio. Burner 22 ignites the mixed gas in combustion chamber. The generated high-temperature gas passes through the space enclosed by the inner wall of burner sleeve 223 and flows into the second inner cavity 230 between the outer wall of burner sleeve 223 and the inner wall of radiant tube 23 at nozzle 2231. The high-temperature gas heats the tube wall of radiant tube 23 as it flows back to the first inner cavity 210 of base 21 through the second inner cavity 230. The tube wall of radiant tube 23 radiates heat to the furnace chamber 10. The first inner cavity 210 collects the high-temperature gas for secondary use.
[0048] 2. The second blower 44 draws the high-temperature gas in the first inner cavity 210 to the main pipe 41 for recovery. The exhaust pipe 35 and the combustion gas pipe 36 deliver harmful flue gas and air to the combustion chamber 310 of the furnace body 31. At the same time, the first blower 34 draws the high-temperature gas in the main pipe 41 to the exhaust pipe 35 to prevent condensation and provide heat to the harmful flue gas. The flue gas flow rate and air flow rate are adjusted by the exhaust pipe 35 and the combustion gas pipe 36 to maintain a suitable air-fuel ratio. The heater 32 heats the combustion chamber 310. At the same time, the first blower 34 draws the high-temperature gas in the main pipe 41 to the combustion chamber 310 to participate in increasing the temperature of the combustion chamber 310. The heated combustion chamber 310 denitrates the harmful flue gas and generates harmless tail gas. Then, the harmless tail gas is discharged under the action of the first blower 34.
[0049] 3. The second blower 44 draws the high-temperature gas in the main pipe 41 that has not been drawn to the combustion mechanism 3 to the heat exchange section 410. The high-temperature gas in the heat exchange section 410 conducts the remaining heat to the heat exchanger 46 and is discharged under the action of the second blower 44. The cold gas pipe 461 injects the protective gas required for sintering lithium battery materials in the furnace chamber 10 of the kiln into the heat exchange section 410. The heat exchanger 46 heats the protective gas required for sintering lithium battery materials in the furnace chamber 10 of the kiln in the heat exchange section 410. The heated gas required for sintering lithium battery materials in the furnace chamber 10 of the kiln is then led out through the hot gas pipe 462 to obtain a protective gas that does not damage the thermal field of the furnace chamber 10.
[0050] Example 2
[0051] Please see Figure 4 This utility model also provides a roller kiln, including a kiln body 1 and a multi-functional heating device provided in any of the implementations of Embodiment 1. The kiln body 1 includes a flue gas section 11, a high-temperature section 12, and a cooling section 13. The kiln furnace 10 enclosed by the inner wall of the kiln body 1 includes a first furnace 110, a second furnace 120, and a third furnace 130. The heating mechanism 2 is installed in sections in the first furnace 110 enclosed by the inner wall of the flue gas section 11 and the second furnace 120 enclosed by the inner wall of the high-temperature section 12. The first pipe 42 is connected to the first inner cavity 210 enclosed by the inner wall of the base 21 of the heating mechanism 2 installed in the high-temperature section 12.
[0052] Specifically, the kiln body 1 includes a flue gas section 11, a high-temperature section 12, and a cooling section 13 connected in sequence. The first furnace chamber 110 enclosed by the inner wall of the flue gas section 11, the second furnace chamber 120 enclosed by the inner wall of the high-temperature section 12, and the third furnace chamber 130 enclosed by the inner wall of the cooling section 13 are connected in sequence. The heating mechanism 2 is installed in sections in the first furnace chamber 110 of the flue gas section 11 and the second furnace chamber 120 of the high-temperature section 12. During operation, the lithium battery material passes through the first furnace chamber 110, the second furnace chamber 120, and the third furnace chamber 130 in sequence. The flue gas section 11 performs preliminary sintering of the lithium battery material and collects the harmful flue gas generated during sintering. The high-temperature section 12 performs high-temperature sintering of the lithium battery material, and the cooling section 13 cools the sintered lithium battery material. During the above process, the waste heat recovery mechanism 4 centrally recovers the high-temperature gas in the first inner cavity 210 of the multiple heating mechanisms 2 installed in the high-temperature section 12.
[0053] Please see Figure 4The furnace body 31 is equipped with an exhaust duct 35 and a combustion-supporting gas pipe 36, both of which are connected to the combustion chamber 310. The exhaust duct 35 is used to guide the harmful gases generated in the kiln chamber 10 to the combustion chamber 310, and the combustion-supporting gas pipe 36 is used to inject air into the combustion chamber 310 for combustion support. An exhaust branch pipe 351 is provided between the exhaust duct 35 and the exhaust section 11, and the exhaust branch pipe 351 is connected to the first furnace chamber 110. By setting the exhaust branch pipe 351, the flue gas generated in the exhaust section 11 can be directly injected into the incineration mechanism 3 for harmless treatment.
[0054] Specifically, multiple exhaust branch pipes 351 are installed between the exhaust duct 35 and the exhaust section 11. The exhaust branch pipes 351 are connected to the exhaust duct 35 and the first furnace chamber 110 of the exhaust section 11. The harmful flue gas generated after the lithium battery material is sintered in the exhaust section 11 can be discharged from the furnace chamber 10 through the exhaust branch pipes 351. During operation, the lithium battery material undergoes preliminary sintering in the first furnace chamber 110. The harmful flue gas generated after the lithium battery material is sintered in the first furnace chamber 110 is discharged to the exhaust duct 35 through the exhaust branch pipes 351. Subsequently, under the action of the first fan 34, the harmful flue gas in the exhaust duct 35 is drawn to the incineration furnace chamber 310 of the furnace body 31 for harmless treatment. After denitrification, the harmless tail gas is discharged through the first fan 34.
[0055] Please see Figure 4 The waste heat recovery mechanism 4 includes a heat exchanger 46, which is fitted onto the end of the main pipeline 41 near the second fan 44. The heat exchanger 46 has a cold air pipe 461 and a hot air pipe 462, both of which are connected to the heat exchange section 410 of the main pipeline 41 within the heat exchanger 46. A protective gas pipe 463 is provided on one side of the hot air pipe 462. The protective gas pipe 463 passes through the exhaust section 11, the high-temperature section 12, and the cooling section 13, and is connected to the third furnace 130 formed by the inner walls of the first furnace 110, the second furnace 120, and the cooling section 13. The protective gas pipe 463 is used to inject heated protective gas into the kiln furnace 10. By setting the protective gas pipe 463, the heat exchanger 46 can inject preheated protective gas into the kiln furnace 10, maintaining the gas atmosphere required for sintering lithium battery materials in the roller kiln.
[0056] Specifically, a protective gas pipe 463 is installed along the direction of the lithium battery material sequentially passing through the first furnace chamber 110, the second furnace chamber 120, and the third furnace chamber 130, penetrating the entire furnace chamber 10. The protective gas pipe 463 is connected to the hot gas pipe 462, the first furnace chamber 110, the second furnace chamber 120, and the third furnace chamber 130. During operation, the protective gas required for sintering lithium battery materials in the furnace chamber 10 is injected into the heat exchange section 410 through the cold gas pipe 461. The heat exchanger 46 heats the protective gas required for sintering lithium battery materials in the furnace chamber 10 in the heat exchange section 410. The heated gas required for sintering lithium battery materials in the furnace chamber 10 is then led out through the hot gas pipe 462 to obtain a protective gas that does not disrupt the production environment temperature of the furnace chamber 10. The protective gas is then injected into the first furnace chamber 110, the second furnace chamber 120, and the third furnace chamber 130 through the protective gas pipe 463, which also reduces the impact of colder gas on the thermal field inside the furnace chamber and saves the energy consumption required for heating the gas.
[0057] The working principle of the roller kiln:
[0058] 1. The heating mechanism 2 of the flue gas section 11, together with the heating mechanism 2 of the high temperature section 12, heats the furnace chamber 10. The gas pipe 221 and the combustion air pipe 222 deliver gas and air to the combustion chamber inside the burner 22. The gas flow rate and air flow rate are adjusted by the gas pipe 221 and the combustion air pipe 222 to maintain a suitable air-fuel ratio. The burner 22 ignites the mixed gas in the combustion chamber. The generated high temperature gas passes through the space enclosed by the inner wall of the burner sleeve 223 and flows into the second inner cavity 230 between the outer wall of the burner sleeve 223 and the inner wall of the radiant tube 23 at the nozzle 2231. The high temperature gas returns to the first inner cavity 210 of the base 21 through the second inner cavity 230, heating the tube wall of the radiant tube 23. The tube wall of the radiant tube 23 radiates heat to the first furnace chamber 110 and the second furnace chamber 120. The first inner cavity 210 in the high temperature section 12 collects the high temperature gas for secondary use.
[0059] 2. In the exhaust section 11, the harmful flue gas generated after sintering lithium battery materials in the kiln furnace 10 is discharged to the exhaust duct 35 through the exhaust branch pipe 351; in the high-temperature section 12, the second fan 44 draws the high-temperature gas in the first inner cavity 210 to the main pipe 41 for recovery, and the exhaust duct 35 and the combustion gas pipe 36 deliver harmful flue gas and air to the combustion furnace 310 of the furnace body 31. At the same time, the first fan 34 draws the high-temperature gas in the main pipe 41 to the exhaust duct 35 to recover the harmful flue gas. Anti-condensation heating is provided by adjusting the flue gas flow rate and air flow rate through the flue gas duct 35 and the combustion gas pipe 36 to maintain a suitable air-fuel ratio. The heater 32 heats the incinerator 310. At the same time, the first fan 34 draws the high-temperature gas in the main pipe 41 to the incinerator 310 to increase the temperature of the incinerator 310. The heated incinerator 310 denitrates the harmful flue gas and generates harmless exhaust gas. Then, the harmless exhaust gas is discharged under the action of the first fan 34.
[0060] 3. The second blower 44 draws the high-temperature gas in the main pipe 41 that was not drawn to the combustion unit 3 to the heat exchange section 410. The high-temperature gas in the heat exchange section 410 conducts the remaining heat to the heat exchanger 46 and is then discharged under the action of the second blower 44. The cold air pipe 461 injects the protective gas required for sintering lithium battery materials in the kiln furnace 10 into the heat exchange section 410. The heat exchanger 46 heats the protective gas required for sintering lithium battery materials in the kiln furnace 10 in the heat exchange section 410. The heated kiln furnace... The gas required for sintering lithium battery materials in the furnace chamber 10 is drawn out through the hot gas pipe 462 to obtain a protective gas that does not disrupt the production environment temperature of the furnace chamber 10. The protective gas that does not disrupt the production environment temperature of the furnace chamber 10 is then injected into the first furnace chamber 110, the second furnace chamber 120, and the third furnace chamber 130 through the protective gas pipe 463. The lithium battery materials sintered at high temperature are transported to the third furnace chamber 130 of the cooling section 13 for cooling. After cooling is completed, the lithium battery materials sintered at high temperature can be taken out.
[0061] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A multi-useable heating device comprising a heating mechanism (2), a burning mechanism (3), characterized in that, Further comprising a waste heat recovery mechanism (4), the heating mechanism (2) is installed in the kiln body (1) in the kiln hearth (10) surrounded by the inner wall, the waste heat recovery mechanism (4) is connected with the heating mechanism (2) and the incineration mechanism (3); The heating mechanism (2) comprises a base (21) installed on the kiln body (1), a burner (22) arranged in the first inner cavity (210) surrounded by the inner wall of the base (21), and a radiation pipe (23) arranged on the side of the base (21) facing the kiln hearth (10), the inside of the burner (22) can ignite gas and generate high-temperature gas that can flow to the radiation pipe (23), the radiation pipe (23) can heat the kiln hearth (10), and the second inner cavity (230) surrounded by the inner wall of the radiation pipe (23) is in communication with the first inner cavity (210); The incineration mechanism (3) comprises a furnace body (31), a heater (32) arranged in the incineration hearth (310) surrounded by the inner wall of the furnace body (31), an exhaust air duct (33) in communication with the incineration hearth (310), and a first fan (34) arranged at one end of the exhaust air duct (33), the heater (32) can heat the incineration hearth (310); The waste heat recovery mechanism (4) comprises a main pipe (41), a first pipe (42) in communication with the first inner cavity (210), a second pipe (43) in communication with the incineration hearth (310), and a second fan (44) arranged at one end of the main pipe (41), the first pipe (42) and the second pipe (43) are in communication with the main pipe (41), and the high-temperature gas in the first inner cavity (210) enters the incineration hearth (310) through the first pipe (42), the main pipe (41) and the second pipe (43) in sequence.
2. A reusable heating device according to claim 1, wherein, The burner (22) is provided with a gas pipe (221) and a combustion air pipe (222), the gas pipe (221) and the combustion air pipe (222) are in communication with the inside of the burner (22) through the first inner cavity (210) from the outside, the gas pipe (221) is used for injecting gas into the burner (22), and the combustion air pipe (222) is used for injecting air into the burner (22) for combustion support.
3. A reusable heating device according to claim 2, wherein, The burner (22) is provided with a burner nozzle sleeve (223) on the side facing the kiln hearth (10), the burner nozzle sleeve (223) is located in the second inner cavity (230), the burner nozzle sleeve (223) can guide the high-temperature gas generated by the burner (22) to the second inner cavity (230), and the radiation pipe (23) can radiate heat to the kiln hearth (10) after being heated by the high-temperature gas in the second inner cavity (230).
4. The reusable heating device of claim 1, wherein, The furnace body (31) is provided with an exhaust air pipe (35) and a combustion gas pipe (36), the exhaust air pipe (35) and the combustion gas pipe (36) are in communication with the incineration hearth (310), the exhaust air pipe (35) is used for guiding the harmful gas generated by the kiln hearth (10) to the incineration hearth (310), and the combustion gas pipe (36) is used for injecting air into the incineration hearth (310) for combustion support.
5. A reusable heating device according to claim 4, wherein, The third pipeline (45) is communicated with the main pipeline (41) and the smoke exhaust air pipe (35), and the high-temperature gas recovered by the main pipeline (41) can enter the smoke exhaust air pipe (35) through the third pipeline (45) to provide anti-condensation heating for the harmful gas guided to the incineration furnace (310).
6. The reusable heating device of claim 1, wherein, The waste heat recovery mechanism (4) further comprises a heat exchanger (46), which is sleeved on one end of the main pipeline (41) close to the second fan (44), and is used to recover the heat of the high-temperature gas in the heat exchange section (410) of the main pipeline (41) into the heat exchanger (46).
7. A reusable heating device according to claim 6, wherein, The heat exchanger (46) is provided with a cold gas pipe (461) and a hot gas pipe (462), both of which are communicated with the heat exchange section (410), the cold gas pipe (461) is used to inject gas into the heat exchange section (410) for heating, and the hot gas pipe (462) is used to lead out the heated gas in the heat exchange section (410).
8. A roller hearth kiln characterized by, Comprise: The kiln body (1) comprises a smoke exhaust section (11), a high-temperature section (12), and a cooling section (13), the kiln furnace (10) surrounded by the inner wall of the kiln body (1) comprises a first furnace (110), a second furnace (120), and a third furnace (130), the heating mechanism (2) is installed in the first furnace (110) surrounded by the inner wall of the smoke exhaust section (11) and the second furnace (120) surrounded by the inner wall of the high-temperature section (12), and the first pipeline (42) is communicated with the first inner cavity (210) surrounded by the inner wall of the base (21) of the heating mechanism (2) installed in the high-temperature section (12).
9. A roller hearth kiln as defined in claim 8, wherein, The furnace body (31) is provided with a smoke exhaust air pipe (35) and a combustion-supporting gas pipe (36), both of which are communicated with the incineration furnace (310), the smoke exhaust air pipe (35) is used to guide the harmful gas generated in the kiln furnace (10) to the incineration furnace (310), and the combustion-supporting gas pipe (36) is used to inject air into the incineration furnace (310) for combustion support, the smoke exhaust air pipe (35) is provided with a smoke exhaust branch pipe (351) between the smoke exhaust section (11), and the smoke exhaust branch pipe (351) is communicated with the first furnace (110).
10. A roller hearth kiln as defined in claim 8, wherein, The waste heat recovery mechanism (4) comprises a heat exchanger (46) sleeved on one end of the main pipeline (41) close to the second fan (44), the heat exchanger (46) is provided with a cold gas pipe (461) and a hot gas pipe (462), the cold gas pipe (461) and the hot gas pipe (462) are communicated with a heat exchange section (410) of the main pipeline (41) in the heat exchanger (46), one side of the hot gas pipe (462) is provided with a protective gas pipe (463), the protective gas pipe (463) penetrates through the smoke exhaust section (11), the high-temperature section (12) and the cooling section (13) and is communicated with a third furnace (130) formed by the inner walls of the first furnace (110), the second furnace (120) and the cooling section (13), and the protective gas pipe (463) is used for injecting heated protective gas into the kiln furnace (10).