Heat energy recovery system for a movable graphitization furnace

Abstract

The application provides a heat energy recovery system of a movable graphitization furnace, and belongs to the field of graphitization furnaces. The heat energy recovery system comprises: a working station, the movable graphitization furnace is suitable for high-temperature preparation of products in a furnace body area at the working station; a cooling station, the movable graphitization furnace is suitable for moving to the cooling station after power failure; a furnace outlet station, the movable graphitization furnace is suitable for moving to the furnace outlet station after completing the cooling operation at the cooling station; a first waste heat recovery device located at the furnace outlet station, the first waste heat recovery device comprises a water absorption waste heat bin, is suitable for receiving high-temperature filling materials, and is cooled by first cooling water to obtain preliminary cooling filling materials and simultaneously produce first hot water; a second waste heat recovery device located at the cooling station, is suitable for being inserted into an air passage to lead out the heat in the movable graphitization furnace, and the second waste heat recovery device is suitable for making a heat carrier flow through, and the heat carrier comprises water, molten salt and / or heat conducting oil.

Description

TECHNICAL FIELD

[0001] The present application mainly relates to the field of graphitization, in particular to a heat energy recovery system of a movable graphitization furnace. BACKGROUND

[0002] Graphitization production is to use electric energy to heat the carbon products in the furnace to above 2350℃, and carbon materials are converted into graphite materials. After that, the graphitization furnace and the products in the furnace are cooled, at this time, a large amount of heat energy stored in the furnace needs to be released, and the temperature of the materials in the furnace needs to be reduced to below 400℃ as soon as possible before the next step of discharging operation.

[0003] In the cooling stage after the graphitization furnace is powered off, the temperature is reduced from high temperature to 1800℃, and it is difficult to recover heat energy due to the high temperature. On this basis, the temperature is reduced from 1800℃ to 1000℃, and the heat energy is slowly released from the furnace core. In addition, the products and auxiliary materials in the graphitization furnace are basically carbon materials, and when the temperature of the materials is above 400℃, the materials will be oxidized a lot if they are exposed to air. Furthermore, in the traditional graphitization process, the graphitization furnaces are arranged in parallel in the workshop, the distance between the furnaces is small, and there is no extra space to install other heat energy recovery equipment around the furnaces and above the furnaces without affecting the production. Based on the above reasons, the excess heat generated in the existing graphitization production process basically has no good way to be recovered and utilized. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a heat energy recovery system of a movable graphitization furnace, which can conveniently and effectively realize heat energy recovery after the graphitization furnace is powered off, and reduce the energy consumption and cost of graphitization production.

[0005] To solve the above technical problems, the present application provides a heat energy recovery system of a movable graphitization furnace, which is suitable for a movable graphitization furnace including a furnace body area suitable for loading products and filling materials, and comprises: a working station, wherein the movable graphitization furnace is suitable for high-temperature preparation of the products in the furnace body area at the working station; a cooling station, wherein the movable graphitization furnace is suitable for moving from the working station to the cooling station after power failure, and is suitable for cooling operation at the cooling station, wherein the cooling operation includes cooling of the filling materials; a furnace outlet station, wherein the movable graphitization furnace is suitable for moving to the furnace outlet station after the cooling operation at the cooling station is completed; and a first waste heat recovery device located at the furnace outlet station, wherein the first waste heat recovery device comprises a water-containing waste heat absorption bin, wherein the water-containing waste heat absorption bin is suitable for receiving the filling materials in a high-temperature state, and cooling the filling materials in the high-temperature state by first cooling water in the water-containing waste heat absorption bin to obtain preliminary cooling filling materials and simultaneously produce first hot water.

[0006] Optionally, the water-containing waste heat absorption bin comprises a bin shell and one or more first heat exchange water pipes located in the bin shell, wherein the bin shell comprises a double-layer steel plate structure, the water-containing waste heat absorption bin comprises a bin feeding port and a bin discharging port on the bin shell, a bin water inlet port and a bin water outlet port are arranged on the bin shell, the bin water inlet port and the bin water outlet port are in communication with the first heat exchange water pipes, and the filling materials in the high-temperature state are suitable for entering the water-containing waste heat absorption bin from the bin feeding port.

[0007] Optionally, the first waste heat recovery device further comprises a cold material machine connected with the bin discharging port, and the cold material machine is suitable for further cooling the preliminary cooling filling materials to obtain final cooling filling materials.

[0008] Optionally, the cold material machine comprises a cold material machine inlet and a cold material machine outlet, the cold material machine inlet is butted against the bin discharging port, and the cold material machine further comprises a waste heat recovery loop and a material cooling loop, wherein the waste heat recovery loop is close to the cold material machine inlet, the material cooling loop is close to the cold material machine outlet, the waste heat recovery loop is suitable for cooling the preliminary cooling filling materials by second cooling water to produce second hot water, and the material cooling loop is suitable for further cooling the filling materials flowing therethrough by circulating cooling water to obtain the final cooling filling materials.

[0009] Optionally, the cold material machine comprises a cold material machine shell and one or more second heat exchange water pipes and one or more third heat exchange water pipes located in the cold material machine shell, wherein the cold material machine comprises a double-layer steel plate structure, the waste heat recovery circuit comprises a first inlet and a first outlet, the material cooling circuit comprises a second inlet and a second outlet, wherein the first inlet and the first outlet are in communication with the second heat exchange water pipes, the second inlet and the second outlet are in communication with the third heat exchange water pipes; the first inlet is located at a position close to the cold material machine inlet of the cold material machine shell, the second outlet is located at a position close to the cold material machine outlet of the cold material machine shell, the first outlet and the second inlet are located at a position close to the middle section of the cold material machine shell.

[0010] Optionally, the movable graphitization furnace further comprises a refractory brick wall and an outer wall part, and an air passage is formed between the refractory brick wall and the outer wall part, and the heat energy recovery system further comprises a second waste heat recovery device located at the cooling station, and the second waste heat recovery device is adapted to insert into the air passage at the cooling station to lead out heat in the movable graphitization furnace.

[0011] Optionally, the second waste heat recovery device comprises a waste heat recovery pipe, and the waste heat recovery pipe comprises a heat-resistant outer pipe and a heat-resistant inner pipe, the heat-resistant outer pipe is sleeved outside the heat-resistant inner pipe, and a heat carrier is adapted to flow through the waste heat recovery pipe, wherein the heat carrier is adapted to flow into the heat-resistant outer pipe and flow out of the heat-resistant inner pipe, and the heat carrier is adapted to lead out heat discharged from the movable graphitization furnace during the flowing.

[0012] Optionally, the second waste heat recovery device further comprises a heat carrier inlet and a heat carrier outlet, two ends of the heat-resistant inner pipe comprise an inner pipe first end and an inner pipe second end, and two ends of the heat-resistant outer pipe comprise an outer pipe first end and a closed outer pipe second end, wherein the inner pipe second end is inserted into the heat-resistant outer pipe and close to the outer pipe second end, the heat carrier inlet is arranged at the outer pipe first end of the heat-resistant outer pipe, and the heat carrier outlet is arranged at the inner pipe first end of the heat-resistant inner pipe.

[0013] Optionally, the second waste heat recovery device is arranged above the cooling station, and the waste heat recovery pipe is adapted to insert into the movable graphitization furnace from the top of the cooling station to lead out heat discharged from the movable graphitization furnace, and the heat carrier comprises water, molten salt and heat conducting oil.

[0014] Optionally, a heat pipe frame and a transmission device are further included, wherein the heat pipe frame is adapted to carry a plurality of the waste heat recovery pipes, and the transmission device is adapted to control the plurality of the waste heat recovery pipes to be inserted into the auxiliary material to different depths, and the insertion depths of the waste heat recovery pipes correspond to the temperature of the auxiliary material.

[0015] Optionally, the second waste heat recovery device is arranged at the side or bottom of the cooling station, and the waste heat recovery pipe is adapted to be inserted into the air duct to lead out the heat discharged by the movable graphitization furnace, wherein the heat carrier includes water and heat conducting oil.

[0016] Compared with the prior art, the present application has the following advantages: the present application is based on the design of a heat energy recovery system of a movable graphitization furnace, and hot water can be generated while the filling material is cooled, thereby saving energy consumption as a whole and being environmentally friendly and economical. In some preferred embodiments, based on the scene of the movable graphitization furnace, flexible layout of the waste heat recovery equipment can be realized, and the operation convenience and effect of the heat recovery of the movable graphitization furnace can be improved. In general, the movable graphitization is to move the graphitization furnace, and when the high-temperature furnace is cooled at the cooling station, no other operation is performed, the waste heat absorption equipment can be installed in the space around the furnace, the heat in the furnace is absorbed, the cooling is accelerated, and the production efficiency is improved; at the furnace discharge station, the water absorption waste heat bin and the cooling machine (preferably, they are arranged at the same time, or only the water absorption waste heat bin can be arranged) are installed, the graphitization furnace filling material, and the product only occupies one third of the total volume, two thirds of the bulk filling material and the resistance material, a large amount of heat energy is contained in the bulk material, and the waste heat is recovered through the heat absorption bin and the heat absorption cooling machine; in actual production, the higher the discharge temperature is, the more stable the quality of the product (for example, the graphite negative electrode) is, the higher the production efficiency is, and the larger the waste heat in the bulk material is, so that the cooling needs to be higher, and the first waste heat recovery device of the present application is more meaningful, which improves the production efficiency and recovers more waste heat. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings are included to provide a further understanding of the present application, and they are collected and constitute a part of the present application, which illustrate the embodiments of the present application, and together with the present specification, play a role in explaining the principles of the present application. In the drawings:

[0018] Figure 1 is a system block diagram of a heat energy recovery system of a movable graphitization furnace according to an embodiment of the present application;

[0019] Figure 2 is a structural schematic diagram of a movable graphitization furnace applicable to a heat energy recovery system of a movable graphitization furnace according to an embodiment of the present application;

[0020] Figure 3 is a movable graphitization furnace according to an embodiment of the present application; Figure 1A first waste heat recovery device in a heat energy recovery system of a movable graphitization furnace;

[0021] Figure 4 is a structural schematic view of a second waste heat recovery device in a heat energy recovery system of a movable graphitization furnace as shown in Figure 1 ;

[0022] Figure 5 is a structural schematic view of a second waste heat recovery device in a heat energy recovery system of a movable graphitization furnace as shown in Figure 4 ;

[0023] Figure 6 is a structural schematic view of a second waste heat recovery device in a heat energy recovery system of a movable graphitization furnace as shown in Figure 4 ;

[0024] Reference signs:

[0025] A heat energy recovery system 10 of a movable graphitization furnace, a working station 11, a cooling station 121, an out furnace station 122, a first waste heat recovery device 13, a second waste heat recovery device 14;

[0026] A movable graphitization furnace 100, a furnace body area 101, an article 102, a filling material 103, a furnace wall part 104, a refractory brick wall 1041, an outer wall part 1042, an air duct 1043, a heat-resistant outer pipe 141, a heat-resistant inner pipe 142, a heat carrier inlet 143, a heat carrier outlet 144, a first end of the outer pipe 1411, a second end of the outer pipe 1412, a first end of the inner pipe 1421, a second end of the inner pipe 1422, a moving support mechanism 145;

[0027] A water absorption waste heat bunker 131, a bunker shell 1311, a first heat exchange water pipe 1312, a bunker water inlet 1313, a bunker water outlet 1314, a cold material machine 132, a cold material machine shell 1320, a waste heat recovery loop 1321, a material cooling loop 1322, a second heat exchange water pipe 1323, a third heat exchange water pipe 1324, a first inlet 1325, a first outlet 1326, a second inlet 1327, a second outlet 1328, the heat-resistant outer pipe 141 and the heat-resistant inner pipe 142. DETAILED DESCRIPTION

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some examples or embodiments of the present application, and for those skilled in the art, the present application can also be applied to other similar scenarios without creating any creative labor. Unless it is obvious from the language environment or otherwise stated, the same reference signs in the drawings represent the same structure or operation.

[0029] As used in the description of the application and the claims that follow, "a," "an," "one," and / or "the" do not exclude plural referents unless modified by other

[0030] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the present application unless otherwise specifically stated. It is to be understood that the drawings are not necessarily to scale as the dimensions of the parts shown are for the clarity of presentation and are shown exaggerated in relation to each other. The techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail but should be considered as if the discussion were incorporated herein by reference in its entirety. In all examples shown and discussed herein, any particular value should be interpreted as merely an example and not a limitation. Other examples of the exemplary embodiments can have different values. It is noted that like numbers and letters on opposing pages refer to like elements, and as such, detailed descriptions of elements that are substantially similar in structure and / or function can not be repeated across following figures.

[0031] In the description of the present application, it is to be understood that the orientation or positional relationships indicated by orientation words such as "front, back, upper, lower, left, right", "horizontal, vertical, perpendicular, horizontal", and "top, bottom" are generally based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Without the opposite indication, these orientation words do not indicate and imply that the devices or elements referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the scope of protection of the present application. The orientation words "inner, outer" refer to the inner and outer relative to the contour of the parts themselves.

[0032] For purposes of the description hereinafter, the terms "upper", "lower", "right", "left", "rear", "front", "vertical", "horizontal", and derivatives thereof (e.g., "vertical ly", "horizontal ly", etc.) can refer to the relative positions of an apparatus as shown in the figures. The terms "on", "above", "under", and the like can refer to spatial relationships where elements are in the same straight line. The terms "first", "second", "third", and the like can be used to describe various elements, but the elements should not be limited by these terms. The terms "plurality" and "a plurality" contain the meaning of "multiple" or "two or more" unless otherwise indicated by the context.

[0033] In addition, it should be noted that the use of "first", "second", and the like, terminology throughout the specification can be used to describe various components, and does not imply that the components are in any specific order. The use of these terms is only to facilitate identification of the corresponding components described herein and should not be taken in a contractual sense. In addition, although the terms used in the present application are selected from well-known and commonly used terms, some of the terms mentioned in the specification of the present application can be selected by the applicant according to his or her judgment, and the detailed meanings thereof are described in the relevant part of the description. In addition, the present application is required to be understood not only by the actual terms used, but also by the meaning implied by each term.

[0034] It will be understood that when a component is referred to as being "on", "connected to", "coupled with", or "contacting" another component, it can be directly on, connected to, coupled with, or contacting the other component, or intervening components can be present. In contrast, when a component is referred to as being "directly on", "directly connected to", "directly coupled with", or "directly contacting" another component, there are no intervening components present. Similarly, when a first component is referred to as being "electrically in contact with" or "electrically coupled with" a second component, there is an electrical path between the first component and the second component that allows electrical current to flow. The electrical path can include capacitors, coupled inductors, and / or other components that allow electrical current to flow, even if there is no direct contact between conductive components.

[0035] The present application provides a heat energy recovery system 10 (hereinafter referred to as "heat energy recovery system 10") of a movable graphitization furnace. The heat energy recovery system is suitable for a movable graphitization furnace such as Figure 2The movable graphitization furnace 100 shown, the heat energy recovery system 10 includes a working station 11, a cooling station 121 and a furnace outlet station 122, and a second waste heat recovery device 14 located at the cooling station 121 and a first waste heat recovery device 13 located at the furnace outlet station 122. According to Figure 2 The movable graphitization furnace 100 includes a furnace body area 101 and an article 102 located in the furnace body area 101, and the movable graphitization furnace 100 is suitable for high-temperature preparation of the article 102 in the furnace body area 101 at the working station 11, and is suitable for moving from the working station 11 to the cooling station 121 after power failure. The movable graphitization furnace 100 is suitable for cooling operation at the cooling station 121, and the cooling operation includes cooling of the packing material 103, and after the cooling operation is completed, the movable graphitization furnace 100 is suitable for moving to the furnace outlet station 122. It should be noted that in the field of graphitization, the packing material 103 can be understood as heat preservation material and / or resistance material. For example, the movable graphitization furnace 100 can be moved between the working station 11, the cooling station 121 and the furnace outlet station 122 by vehicle or ship, and the movable graphitization furnace 100 in the embodiment has the advantages of lightweight and mobility compared with the traditional graphitization furnace.

[0036] Further, Figure 3 A schematic diagram of the first waste heat recovery device 13 included in the heat energy recovery system 10 is shown. The first waste heat recovery device 13 includes a water-containing absorption waste heat bin 131. In combination with Figure 2 The movable graphitization furnace 100 has a packing material 103 around the article 102 in the furnace body area 101, and the water-containing absorption waste heat bin 131 is suitable for receiving the packing material 103 in a high-temperature state, and cooling the packing material 103 in a high-temperature state by the first cooling water located in the water-containing absorption waste heat bin 131 to obtain a preliminary cooling packing material and at the same time to produce first hot water.

[0037] According to Figure 3, the water-absorbing residual heat bin 131 includes a bin shell 1311 and a plurality of first heat exchange water pipes 1312 located in the bin shell 1311. It should be noted that the number of first heat exchange water pipes 1312 in the embodiment is multiple, but the present application is not limited thereto, and in other embodiments of the present application, the number of first heat exchange water pipes can also be set to one. Specifically, the bin shell 1311 includes a double-layer steel plate structure, the water-absorbing residual heat bin 131 includes a bin inlet B and a bin outlet C located on the bin shell 1311, a bin water inlet 1313 and a bin water outlet 1314 are arranged on the bin shell 1311, the bin water inlet 1313 and the bin water outlet 1314 are in communication with the first heat exchange water pipes 1312, the first heat exchange water pipes 1312 form a heat exchanger in the water-absorbing residual heat bin 131, and the packing material 103 in a high-temperature state is adapted to enter the water-absorbing residual heat bin 131 from the bin inlet B. Further combining Figure 2 , Figure 2 , the movable graphitization furnace 100 is adapted to discharge the packing material 103 from the valve A, and in actual production, Figure 3 , the bin inlet B of the water-absorbing residual heat bin 131 is docked with the valve A of the movable graphitization furnace 100, so that the packing material 103 in a high-temperature state is directly discharged from the valve A and falls into the water-absorbing residual heat bin 131 through the bin inlet B and completes preliminary cooling. This way is fast and convenient. On this basis, in some scenarios, in order to assist the smooth discharge of the packing material 103 in the movable graphitization furnace 100, the heat energy recovery system 10 can further increase a grab bucket or a suction machine for transferring the packing material 103 to the water-absorbing residual heat bin 131, thereby improving the discharge efficiency of the system. The packing material treated by the water-absorbing residual heat bin 131 is a preliminary cooling packing material, and the cooling water discharged from the bin water outlet 1314 is first hot water. Since this step is a preliminary cooling step, the temperature of the first hot water is relatively high.

[0038] Further, the first residual heat recovery device 13 in the embodiment further includes a cooling machine 132 connected with the bin outlet C. Specifically, the cooling machine 132 includes a cooling machine inlet D and a cooling machine outlet E. The cooling machine 132 is adapted to further cool the preliminary cooling packing material treated by the water-absorbing residual heat bin 131 to obtain a final cooling packing material and discharge the final cooling packing material from the cooling machine outlet E. Therefore, combining Figure 2 and Figure 3 , the packing material 103 in a high-temperature state in the movable graphitization furnace 100 prepared is sequentially cooled in the path of A~E in the embodiment, and the cooling mode is convenient and the cooling effect is good. Further reference Figure 3In the embodiment, the cold material machine 132 is preferably arranged as two independent water circulation loops, i.e. a waste heat recovery loop 1321 and a material cooling loop 1322, wherein the waste heat recovery loop 1321 is close to the cold material machine inlet D, and the material cooling loop 1322 is close to the cold material machine outlet E. The waste heat recovery loop 1321 is adapted to cool the preliminarily cooled filling material obtained after the water-absorbed waste heat bunker 131 treatment by the second cooling water, and then make the second cooling water into second hot water. The material cooling loop 1322 is adapted to further cool the filling material flowing therethrough by the circulating cooling water, so as to obtain the finally cooled filling material.

[0039] Specifically, according to Figure 3 , the cold material machine 132 comprises a cold material machine shell 1320 and a plurality of second heat exchange water pipes 1323 and a plurality of third heat exchange water pipes 1324 located in the cold material machine shell 1320. The cold material machine 132 comprises a double-layer steel plate structure. The waste heat recovery loop 1321 comprises a first inlet 1325 and a first outlet 1326. The material cooling loop 1322 comprises a second inlet 1327 and a second outlet 1328. The first inlet 1325 and the first outlet 1326 are in communication with the second heat exchange water pipes 1323. The second inlet 1327 and the second outlet 1328 are in communication with the third heat exchange water pipes 1324. Figure 3 As shown in the figure, in the embodiment, the first outlet 1326 is arranged at a position close to the cold material machine inlet D of the cold material machine shell 1320. The second inlet 1327 is arranged at a position close to the cold material machine outlet E of the cold material machine shell 1320. The first inlet 1325 and the second outlet 1328 are arranged at positions close to the middle section of the cold material machine shell 1320. In this way, the cooling pipeline wiring and the production space can be optimized. In the embodiment, the waste heat recovery loop 1321 recovers and utilizes the heat in the preliminarily cooled filling material after preliminary cooling, and converts the heat into other energy requirements in the movable graphitization generation workshop. The material cooling loop 1322 finally cools the filling material to a temperature required for subsequent processing. The cooling water flowing through the third heat exchange water pipes 1324 is preferably cooling circulating water, so as to reduce the energy consumption and cost as a whole.

[0040] According to the above description, in the embodiment, the filling material 103 in a high-temperature state is discharged at the discharging station 122, and then subjected to multi-stage cooling and waste heat recovery by the first waste heat recovery device 13. The waste heat recovery mode is safe and reliable, and solves the problem of difficult cooling of high-temperature filling material (for example, usually above 2000 degrees Celsius). In the multi-stage cooling process, hot water is generated by heat exchange, which can provide recycled and converted energy for graphitization generation, and is economic and environmentally friendly as a whole. Further preferably, according to Figure 1The heat recovery system 10 in the embodiment further comprises a second waste heat recovery device 14, which is adapted to cool the filled material 103 at the cooling station 121 in a manner different from the first waste heat recovery device 13. Specifically, as shown in Figure 2 The movable graphitization furnace 100 has a furnace wall part 104, a partial enlarged structural schematic view of the furnace wall part 104 is shown in Figure 5 Figure 5 The furnace wall part 104 of the movable graphitization furnace 100 comprises a refractory brick wall 1041 and an outer wall part 1042, and the refractory brick wall 1041 and the outer wall part 1042 have an air passage 1043 therebetween. The second waste heat recovery device 14 located at the cooling station 121 is adapted to be inserted into the air passage 1043 to lead out the heat inside the movable graphitization furnace 100.

[0041] In the embodiment, according to Figure 4 and Figure 5 , the second waste heat recovery device 14 is specifically implemented as a waste heat recovery pipe, specifically in combination with Figure 4 The waste heat recovery pipe comprises a heat-resistant outer pipe 141 and a heat-resistant inner pipe 142, the heat-resistant outer pipe 141 is sleeved outside the heat-resistant inner pipe 142, and the waste heat recovery pipe is adapted to flow through a heat carrier, wherein the heat carrier is adapted to flow into the heat-resistant outer pipe 141 and flow out of the heat-resistant inner pipe 142, and the heat carrier is adapted to lead out the heat discharged by the movable graphitization furnace 100 in the process of flowing. Further specifically, the second waste heat recovery device 14 further comprises a heat carrier inlet 143 and a heat carrier outlet 144, both ends of the heat-resistant inner pipe 142 comprise an inner pipe first end 1421 and an inner pipe second end 1422, both ends of the heat-resistant outer pipe 141 comprise an outer pipe first end 1411 and a closed outer pipe second end 1412, wherein the inner pipe second end 1422 is inserted into the heat-resistant outer pipe 141 and is close to the outer pipe second end 1412, the heat carrier inlet 143 is arranged at the outer pipe first end 1411 of the heat-resistant outer pipe 141, and the heat carrier outlet 144 is arranged at the inner pipe first end 1421 of the heat-resistant inner pipe 142.

[0042] According to Figure 5 , the second waste heat recovery device 14 in the embodiment can be arranged at the side or the bottom of the cooling station 121, wherein, as shown in Figure 4 The waste heat recovery pipe is adapted to be inserted into the air passage 1043 to lead out the heat discharged by the movable graphitization furnace 100, wherein the heat carrier comprises water and heat-conducting oil. Specifically, the air passage 1043 is adapted to be communicated to a heat exchanger, as shown in Figure 2 ​In the furnace body area 101 shown, during the high-temperature preparation of product 102, a large amount of high-temperature flue gas is generated in the furnace body area 101. This high-temperature flue gas is discharged to the furnace wall section 104 through the built-in air passage, so that it can be easily cooled by applying a flowing heat carrier through the external waste heat recovery pipe. Traditional graphitization furnaces are large in size and have limited production space, making it difficult to achieve a flexible layout that can accommodate the waste heat recovery pipe of the air passage 1043. Therefore, this embodiment combines a movable graphitization furnace, which allows for flexible implementation of waste heat discharge methods.

[0043] Furthermore, according to Figure 6 The second waste heat recovery device 14 can also be installed above the cooling station 121. The waste heat recovery pipe is adapted to be inserted from above into the furnace top auxiliary material of the movable graphitization furnace 100 at the cooling station 121 to remove the heat discharged from the movable graphitization furnace 100. The heat carrier includes water, molten salt, and heat transfer oil. Figure 5 The difference is that the temperature of the auxiliary material at the furnace top is higher, so the composition of the heat carrier is adjusted to achieve better heat conduction. More preferably, a movable support mechanism 145 is also included. The movable support mechanism 145 specifically includes a heat-conducting tube frame and a transmission device. The heat-conducting tube frame is suitable for supporting multiple waste heat recovery tubes, and the transmission device is suitable for controlling the multiple waste heat recovery tubes to insert them into the auxiliary material at different depths, with the insertion depth corresponding to the temperature of the auxiliary material. In this way, waste heat discharge from the auxiliary material at the furnace top can be flexibly achieved at the cooling station 121. It is understood that... Figure 4~Figure 6 Although the second waste heat recovery device 14 shown is located in the same heat recovery system 10 as the first waste heat recovery device 13, in actual application, the two devices can realize their respective functions in stages; and in other embodiments, depending on the actual production situation, only the first waste heat recovery device 13 or the second waste heat recovery device 14 may be set up, and this application does not limit this.

[0044] The following is a brief description of the complete waste heat recovery process in this embodiment, which simultaneously employs the second waste heat recovery device 14 and the first waste heat recovery device 13 located at the cooling station 121. First, the movable graphitization furnace 100 located at the working station 11 performs high-temperature preparation of the product 102. After preparation is completed, the movable graphitization furnace 100 moves to the cooling station 121, according to... Figure 5 A second waste heat recovery device 14 is inserted into the ventilation channel 1043 between the refractory brick wall 1041 and the outer wall 1042 for cooling. At the cooling station 121, reference can also be made to... Figure 6 A second waste heat recovery device 14 is inserted into the top of the movable graphitization furnace 100 to cool the auxiliary materials on the furnace top. Further, the movable graphitization furnace 100 moves from the cooling station 121 to the unloading station 122, as described above. Figure 2and Figure 3 At least part of the packing material 103 in the movable graphitization furnace 100 is discharged from the valve A and enters the water-carrying waste heat absorption bin 131 through the bin inlet B, so that the packing material 103 in a high-temperature state is preliminarily cooled in the water-carrying waste heat absorption bin 131. Further, the cold material machine inlet D of the cold material machine 132 is connected with the bin outlet C of the water-carrying waste heat absorption bin 131, and the cold material machine 132 is suitable for further cooling the preliminarily cooled packing material treated by the water-carrying waste heat absorption bin 131, so as to obtain a finally cooled packing material and discharge the finally cooled packing material from the cold material machine outlet E. In this embodiment, the cold material machine 132 is preferably provided with a waste heat recovery circuit 1321 and a material cooling circuit 1322, so as to realize the functions of cooling and waste heat recovery in stages.

[0045] It should be noted that, in the field of graphitization furnaces, the heat in the graphitization furnace is mainly stored in the product zone in the furnace core (i.e., the furnace body zone 101 as shown in Figure 2 After power failure, most of the heat is transferred to the packing material 103. When waste heat is recovered, it is a more effective and convenient means to take out the packing material 103 from the furnace for heat recovery. Therefore, compared with the first waste heat recovery device 13 and the second waste heat recovery device 14, the first waste heat recovery device 13 has the advantage of better waste heat recovery effect. However, when the packing material 103 cannot be taken out or is difficult to be taken out in some production scenarios, the second waste heat recovery device 14 can be used. The embodiment of the present application has the advantage of flexible waste heat recovery due to the use of the movable graphitization furnace.

[0046] The above description has described the basic concepts. Obviously, for those skilled in the art, the above disclosure of the application is only used as an example and does not constitute a limitation on the application. Although it is not explicitly stated here, those skilled in the art can make various modifications, improvements and corrections to the application. Such modifications, improvements and corrections are suggested in the present application, so such modifications, improvements and corrections still belong to the spirit and scope of the exemplary embodiments of the present application.

[0047] At the same time, specific words are used in the present application to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" means a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that the "an embodiment" or "one embodiment" or "an alternative embodiment" mentioned in different places in the specification does not necessarily refer to the same embodiment. In addition, certain features, structures or characteristics in one or more embodiments of the present application can be properly combined.

[0048] Similarly, it should be noted that, in order to simplify the description of the present application and thus aid in the understanding of one or more embodiments, the foregoing description of the embodiments of the present application sometimes combines multiple features into a single embodiment, drawing, or description thereof. However, this disclosure method does not imply that the subject matter of the present application requires more features than those mentioned in the claims. In fact, the embodiments contain fewer features than all the features of the single embodiments disclosed above.

[0049] In some embodiments, numbers describing the quantity of components and attributes are used. It should be understood that such numbers used in the description of embodiments are modified in some examples with the terms "approximately," "approximately," or "generally." Unless otherwise stated, "approximately," "approximately," or "generally" indicates that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may be changed depending on the characteristics required by individual embodiments. In some embodiments, numerical parameters should take into account specified significant digits and employ a general method of digit reservation. Although the numerical ranges and parameters used to confirm their breadth of scope in some embodiments of this application are approximate values, in specific embodiments, such values ​​are set as precisely as feasible.

[0050] Although this application has been described with reference to specific embodiments, those skilled in the art should recognize that the above embodiments are only used to illustrate this application, and various equivalent changes or substitutions can be made without departing from the spirit of this application. Therefore, any changes or modifications to the above embodiments within the essential spirit of this application will fall within the scope of the claims of this application.

Claims

1. A heat energy recovery system of a movable graphitization furnace, characterized by, The application relates to a movable graphitization furnace, which comprises a furnace body area, a refractory brick wall and an outer wall part, the furnace body area is suitable for loading products and packing materials, the packing materials are heat preservation materials and / or resistance materials, the refractory brick wall and the outer wall part are provided with air passages, and the heat energy recovery system comprises: a working station, the movable graphitization furnace is suitable for high-temperature preparation of the products in the furnace body area; a cooling station, the movable graphitization furnace is suitable for moving from the working station to the cooling station after power failure, and the movable graphitization furnace is suitable for cooling operation in the cooling station, the cooling operation comprising cooling of the packing materials; a furnace outlet station, the movable graphitization furnace is suitable for moving to the furnace outlet station after the cooling operation in the cooling station is completed; a first waste heat recovery device, which is located in the furnace outlet station, comprises a water-absorbing waste heat bin and a cold material machine arranged in sequence in the discharge path of the packing materials, wherein the water-absorbing waste heat bin is suitable for receiving the packing materials in a high-temperature state and cooling the packing materials in the high-temperature state by first cooling water in the water-absorbing waste heat bin to obtain primary cooling packing materials and simultaneously produce first hot water, and the cold material machine is suitable for further cooling the primary cooling packing materials to obtain final cooling packing materials; and a second waste heat recovery device, which is located in the cooling station, is suitable for inserting the air passages in the cooling station to lead out the heat in the movable graphitization furnace, and is suitable for flowing through a heat carrier, the heat carrier comprising water, molten salt and / or heat-conducting oil, wherein the water-absorbing waste heat bin comprises a bin shell and one or more first heat exchange water pipes in the bin shell, wherein the bin shell comprises a double-layer steel plate structure, the water-absorbing waste heat bin comprises a bin feeding port and a bin discharging port on the bin shell, and a bin water inlet port and a bin water outlet port are arranged on the bin shell and are in communication with the first heat exchange water pipes; the cold material machine comprises a cold material machine inlet and a cold material machine outlet, the cold material machine inlet is in butt joint with the bin discharging port, the cold material machine further comprises a waste heat recovery loop and a material cooling loop, wherein the waste heat recovery loop is close to the cold material machine inlet, the material cooling loop is close to the cold material machine outlet, the waste heat recovery loop is suitable for cooling the primary cooling packing materials by second cooling water to produce second hot water, and the material cooling loop is suitable for further cooling the packing materials flowing therethrough by circulating cooling water to obtain the final cooling packing materials; the cold material machine comprises a cold material machine shell and one or more second heat exchange water pipes and one or more third heat exchange water pipes in the cold material machine shell, wherein the cold material machine comprises a double-layer steel plate structure, the waste heat recovery loop comprises a first inlet and a first outlet, the material cooling loop comprises a second inlet and a second outlet, wherein, The first inlet and the first outlet are in communication with the second heat exchange water pipe, and the second inlet and the second outlet are in communication with the third heat exchange water pipe. The first inlet is located near the inlet of the cold material machine, the second outlet is located near the outlet of the cold material machine, and the first outlet and the second inlet are located near the middle section of the cold material machine.

2. The thermal energy recovery system of claim 1, wherein, The second waste heat recovery device comprises a waste heat recovery pipe, which comprises a heat-resistant outer pipe and a heat-resistant inner pipe, the heat-resistant outer pipe is sleeved outside the heat-resistant inner pipe, and the waste heat recovery pipe is adapted to flow through the heat carrier, wherein the heat carrier is adapted to flow into the heat-resistant outer pipe and flow out of the heat-resistant inner pipe, and the heat carrier is adapted to carry out the heat discharged by the movable graphitization furnace during the flow.

3. The thermal energy recovery system of claim 2, wherein, The second waste heat recovery device further comprises a heat carrier inlet and a heat carrier outlet, both ends of the heat-resistant inner pipe comprise an inner pipe first end and an inner pipe second end, both ends of the heat-resistant outer pipe comprise an outer pipe first end and a closed outer pipe second end, wherein the inner pipe second end is inserted into the heat-resistant outer pipe and is close to the outer pipe second end, the heat carrier inlet is arranged at the outer pipe first end of the heat-resistant outer pipe, and the heat carrier outlet is arranged at the inner pipe first end of the heat-resistant inner pipe.

4. The thermal energy recovery system of claim 2, wherein, The second waste heat recovery device is arranged above the cooling station, the waste heat recovery pipe is adapted to be inserted into the auxiliary material on the top of the movable graphitization furnace from above at the cooling station to carry out the heat discharged by the movable graphitization furnace, and the heat carrier comprises water, molten salt and heat conducting oil.

5. The thermal energy recovery system of claim 4, wherein, Further comprising a heat conducting pipe rack and a transmission device, wherein the heat conducting pipe rack is adapted to carry a plurality of waste heat recovery pipes, and the transmission device is adapted to control a plurality of waste heat recovery pipes to be inserted into the auxiliary material to different depths, and the insertion depth of the waste heat recovery pipe corresponds to the temperature of the auxiliary material.

6. The thermal energy recovery system of claim 2, wherein, The second waste heat recovery device is arranged at the side or bottom of the cooling station, the waste heat recovery pipe is adapted to be inserted into the air duct to carry out the heat discharged by the movable graphitization furnace, and the heat carrier comprises water and heat conducting oil.

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