Waste heat recovery device of internal serial graphitization furnace

Abstract

The utility model relates to an internal serial graphitization furnace waste heat recovery device which comprises a base, a motor is arranged in the base, an output shaft of the motor is upwards and fixedly connected with a rotating disc, supporting seats are arranged on the left side and the right side of the top of the rotating disc, a heat preservation sleeve is detachably arranged on one supporting seat, and a heat exchange sleeve is fixedly arranged on the other supporting seat. A first annular pipe is arranged in the lower portion of the heat exchange sleeve, a second annular pipe and a third annular pipe are arranged in the upper portion of the heat exchange sleeve from bottom to top, the top of the first annular pipe is communicated with the bottom of the second annular pipe through a plurality of first heat exchange pipes, a hollow annular heat exchange plate is arranged at the bottom in the heat exchange sleeve, and the top of the heat exchange plate is coaxially and fixedly connected with a heat conduction sleeve. The bottom ends of the second heat exchange pipes communicate with the peripheral side of the heat exchange plate, the top ends of the second heat exchange pipes communicate with the inner side of the third annular pipe, and a plurality of heat conduction fins are arranged on the outer side of the heat conduction sleeve between every two adjacent second heat exchange pipes and fixedly connected with the first heat exchange pipes. The heat preservation sleeve can be replaced by the heat exchange sleeve in the cooling process, waste heat of the furnace body is effectively recycled, and the device is more practical.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of graphitization furnace, concretely relates to a kind of inner string graphitization furnace waste heat recovery device. BACKGROUND

[0002] ‌Graphitization furnace is a kind of high-temperature processing equipment for sintering and graphitization of carbon materials, purification of graphite powder and other materials that can be graphitized in carbon environment, and can be divided into direct heating furnace and indirect heating furnace according to heating mode.Direct heating furnace refers to that electric current directly passes through carbon blank to be graphitized to generate high temperature, which is resistance furnace type with carbon blank itself as resistance, and there are two kinds of Acheson graphitization furnace and inner heat stringing graphitization furnace.Among them, inner heat stringing graphitization furnace is called inner string graphitization furnace, which has the advantages of fast temperature rise per unit hour, high thermal efficiency, low power consumption, short power transmission time, uniform electrode quality and the like compared with Acheson graphitization furnace.

[0003] At present, the temperature of inner string graphitization furnace after primary production is relatively high, and it is usually needed to be cooled before secondary charging production, and the cooling method used is generally natural cooling, but due to the heat insulation effect of the heat preservation layer on the furnace body, the time required for natural cooling is relatively long, which is not conducive to subsequent production, and it is easy to increase the burning loss of heat preservation layer, reduce the service life of heat preservation layer, and the heat is naturally lost, which causes great waste, and needs to be improved CONTENT OF UTILITY MODEL

[0004] Therefore, the utility model aims to provide a kind of inner string graphitization furnace waste heat recovery device, can be exchanged into heat exchange cover when cooling, realize the effective recovery and utilization of furnace body waste heat, to solve the above problems.

[0005] In order to achieve the above object, the utility model adopts the technical scheme: a kind of inner string graphitization furnace waste heat recovery device, including pedestal and the inverted L-shaped support plate of pedestal one side, the pedestal is built-in motor, the output shaft of the motor is stretched out pedestal and coaxially fixedly connected with carousel, the top of carousel is fixedly equipped with support seat on left and right sides, one support seat is detachably equipped with heat preservation sleeve, another support seat is fixedly equipped with heat exchange sleeve, the top of heat preservation sleeve is open, and first through-hole is formed in the center of bottom, the top of heat exchange sleeve is open, and second through-hole is formed in the center of bottom, first ring pipe is fixedly equipped in the lower part of heat exchange sleeve, and second ring pipe and third ring pipe are sequentially and interval fixedly equipped in the upper part from bottom to top, the top of first ring pipe is communicated with the bottom of second ring pipe by a plurality of first heat exchange pipes, hollow annular heat exchange plate is fixedly equipped on the inner bottom of heat exchange sleeve, the top of heat exchange plate is coaxially fixedly connected with the heat conduction sleeve of top open, third through-hole is formed in the center of bottom of heat conduction sleeve, a plurality of second heat exchange pipes are fixedly equipped on the outside of heat conduction sleeve vertically, the bottom end of second heat exchange pipe is communicated with the circumferential side of heat exchange plate, and the top end is communicated with the inner side of third ring pipe, a plurality of heat conduction fins are fixedly equipped on the outside of heat conduction sleeve between adjacent two second heat exchange pipes, the heat conduction fin is fixedly connected with adjacent first heat exchange pipe, the bottom of first ring pipe is communicated with first input pipe that is stretched out heat exchange sleeve, the bottom of heat exchange plate is communicated with second input pipe that is stretched out heat exchange sleeve, the outside of second ring pipe is communicated with first output pipe that is stretched out heat exchange sleeve, the outside of third ring pipe is communicated with second output pipe that is stretched out heat exchange sleeve, first input pipe, second input pipe, first output pipe and second output pipe are all communicated with hose, the horizontal portion of support plate is located above pedestal, and a plurality of single-rod hydraulic cylinders that are vertically fixedly equipped are uniformly distributed on it, the piston rod of single-rod hydraulic cylinder is downward and fixedly connected with same lifting ring, the inside of lifting ring is fixedly sleeved with inner string graphitization furnace body, heat preservation sleeve and heat exchange sleeve can be sleeved on the outside of inner string graphitization furnace body, and when heat preservation sleeve is sleeved on inner string graphitization furnace body, the top of heat preservation sleeve is abutted on the bottom of lifting ring, the inner wall of heat preservation sleeve is abutted with the outer wall of inner string graphitization furnace body, the discharge pipe of inner string graphitization furnace body bottom is stretched out to heat preservation sleeve below through first through-hole, when heat exchange sleeve is sleeved on inner string graphitization furnace body, the top of heat exchange sleeve and heat conduction sleeve is abutted on the bottom of lifting ring, the inner wall of heat conduction sleeve is abutbed with the outer wall of inner string graphitization furnace body, the discharge pipe of inner string graphitization furnace body bottom is stretched out to heat exchange sleeve below through third through-hole, the inside of heat exchange plate and second through-hole.

[0006] Preferably, the outer bottom of the heat preservation cover is fixedly connected with a mounting block through a plurality of supporting legs, a mounting box is fixedly connected on the top of the corresponding supporting seat of the heat preservation cover, the top of the mounting box is open, the mounting block is inserted into the mounting box, a double-rod hydraulic cylinder is fixedly and longitudinally arranged on the corresponding supporting seat of the heat preservation cover, and the two piston rods of the double-rod hydraulic cylinder are fixedly connected with square limiting frames.

[0007] Preferably, the mounting block is matched with the mounting box.

[0008] Preferably, the limiting frame is matched with the mounting box.

[0009] The utility model discloses beneficial effect is: before using, first input pipe can pass through its on the hose and the existing first heat medium input pipeline intercommunication, first output pipe can pass through its on the hose and the existing first heat medium output pipeline intercommunication, in order to utilize first heat medium and carry out heat exchange, second input pipe can pass through its on the hose and the existing second heat medium input pipeline intercommunication, second output pipe can pass through its on the hose and the existing second heat medium output pipeline intercommunication, in order to utilize second heat medium and carry out heat exchange. In the initial state, the heat preservation sleeve is located below the inner string graphitization furnace body, during normal graphitization production, the single rod hydraulic cylinder can be operated, the piston rod is elongated, the lifting ring and the inner string graphitization furnace body can be driven to move downward as a whole, the inner string graphitization furnace body is inserted into the heat preservation sleeve, until the lifting ring is pressed to the top of the heat preservation sleeve, the inner string graphitization furnace body can be charged and graphitized, and the process can be carried out, and the heat preservation sleeve can effectively insulate and heat the inner string graphitization furnace body. After the first production is completed, the single rod hydraulic cylinder can be operated again, the piston rod is retracted, the lifting ring and the inner string graphitization furnace body can be driven to move upward to a suitable height, the motor is operated again, the rotating disc is rotated by 180 degrees, the heat exchange sleeve can be rotated to below the inner string graphitization furnace body. Then, the piston rod of the single rod hydraulic cylinder is elongated again, the inner string graphitization furnace body is inserted into the heat exchange sleeve, heat exchange can be carried out, specifically, the heat of the inner string graphitization furnace body can be effectively transmitted to the first heat exchange pipe, the heat exchange plate and the second heat exchange pipe by the heat conduction sleeve and the heat conduction fin, the cooperation of the first medium input pipeline, the first input pipe, the first ring pipe, the plurality of first heat exchange pipes, the second ring pipe, the first output pipe and the first medium output pipeline can form the flow route of the first heat exchange medium, the cooperation of the second medium input pipeline, the second input pipe, the hollow heat exchange plate, the plurality of second heat exchange pipes, the third ring pipe, the second output pipe and the second medium output pipeline can form the flow route of the second heat exchange medium, so that the heat of the inner string graphitization furnace body can be utilized to exchange heat with the two heat exchange media at the same time, the waste heat of the inner string graphitization furnace body can be effectively exchanged and recovered into the corresponding heat exchange medium, the waste heat recovery effect is better, the efficiency is higher, and the inner string graphitization furnace body can be cooled quickly, so that the subsequent production is facilitated. After cooling is completed, the inner string graphitization furnace body is moved out of the heat exchange sleeve, the motor is operated again, the rotating disc is reversed by 180 degrees, the heat preservation sleeve can be rotated back to the original position, then the inner string graphitization furnace body is inserted into the heat preservation sleeve, and the graphitization production can be continued. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is the main view structure schematic diagram of the utility model;

[0011] Figure 2 is the main view structure schematic diagram of the heat preservation sleeve of the utility model;

[0012] Figure 3 is the main view structure schematic diagram of the inner string graphitization furnace body of the utility model is sleeved on the heat preservation sleeve;

[0013] Figure 4 is the main view structure schematic diagram of the heat exchange sleeve of the utility model;

[0014] Figure 5 is the main view structure schematic diagram of the heat exchange sleeve of the utility model;

[0015] Figure 6 is the main view structure schematic diagram of the inner string graphitization furnace body of the utility model is sleeved on the heat exchange sleeve;

[0016] Figure 7 is the main view structure schematic diagram of the mounting block of the utility model;

[0017] Figure 8 is the main view structure schematic diagram of the mounting box of the utility model;

[0018] Figure 9 is the left view structure schematic diagram of the limiting frame of the utility model.

[0019] The figure mark: 1 is base, 2 is support board, 3 is motor, 4 is carousel, 5 is support seat, 6 is heat preservation sleeve, 7 is heat exchange sleeve, 8 is first through hole, 9 is second through hole, 10 is first ring pipe, 11 is second ring pipe, 12 is third ring pipe, 13 is first heat exchange pipe, 14 is heat exchange plate, 15 is heat conduction sleeve, 16 is third through hole, 17 is second heat exchange pipe, 18 is heat conduction fin, 19 is first input pipe, 20 is second input pipe, 21 is first output pipe, 22 is second output pipe, 23 is hose, 24 is single rod hydraulic cylinder, 25 is lifting ring, 26 is inner string graphitization furnace body, 27 is support leg, 28 is mounting block, 29 is mounting box, 30 is double rod hydraulic cylinder, 31 is limiting frame. Specific implementation

[0020] The utility model will be further described in detail in combination with the drawings and specific implementation:

[0021] For example, Figures 1 to 9As shown, an inner string graphitization furnace waste heat recovery device, including base 1 and set to the base 1 one side of inverted L-shaped support plate 2, the base 1 built-in motor 3, the output shaft of motor 3 upwardly out of base 1 and coaxially fixed connection has rotary disc 4, the top of rotary disc 4 left and right sides are all solidly provided with support seat 5, a support seat 5 can be detachably provided with heat preservation sleeve 6, the other support seat 5 is fixedly provided with heat exchange sleeve 7. The top of heat preservation sleeve 6 is open, the bottom center is provided with first through hole 8, the top of heat exchange sleeve 7 is open, the bottom center is provided with second through hole 9. The lower part of heat exchange sleeve 7 is fixedly provided with first ring tube 10, the upper part is sequentially and spacedly fixedly provided with second ring tube 11 and third ring tube 12 from bottom to top, the top of first ring tube 10 is communicated with the bottom of second ring tube 11 through a plurality of first heat exchange pipes 13. The inner bottom of heat exchange sleeve 7 is coaxially fixedly provided with hollow annular heat exchange plate 14, the top of heat exchange plate 14 is coaxially fixedly connected with the top open heat conduction sleeve 15, the bottom center of heat conduction sleeve 15 is provided with third through hole 16, the outer side of heat conduction sleeve 15 is vertically fixedly provided with a plurality of second heat exchange pipes 17, the bottom end of second heat exchange pipe 17 is communicated with the circumferential side of heat exchange plate 14, the top end is communicated with the inner side of third ring tube 12, a plurality of heat conduction fins 18 are fixedly provided on the outer side of heat conduction sleeve 15 between adjacent two second heat exchange pipes 17, the heat conduction fin 18 is fixedly connected with the adjacent first heat exchange pipe 13. The bottom of first ring tube 10 is communicated with first input pipe 19 extending out of heat exchange sleeve 7, the bottom of heat exchange plate 14 is communicated with second input pipe 20 extending out of heat exchange sleeve 7, the outer side of second ring tube 11 is communicated with first output pipe 21 extending out of heat exchange sleeve 7, the outer side of third ring tube 12 is communicated with second output pipe 22 extending out of heat exchange sleeve 7, first input pipe 19, second input pipe 20, first output pipe 21 and second output pipe 22 are all communicated with hose 23. The horizontal part of support plate 2 is located above the base 1 and a plurality of vertical through fixed single rod hydraulic cylinders 24 are uniformly distributed thereon, the piston rod of single rod hydraulic cylinder 24 downwardly and fixedly connected with the same lifting ring 25, the inner side of lifting ring 25 is fixedly sleeved with inner string graphitization furnace body 26, heat preservation sleeve 6 and heat exchange sleeve 7 can be sleeved on the outer side of inner string graphitization furnace body 26, and when heat preservation sleeve 6 is sleeved on inner string graphitization furnace body 26, the top of heat preservation sleeve 6 abuts on the bottom of lifting ring 25, the inner wall of heat preservation sleeve 6 abuts on the outer wall of inner string graphitization furnace body 26, the discharge pipe at the bottom of inner string graphitization furnace body 26 extends out to below heat preservation sleeve 6 through first through hole 8, when heat exchange sleeve 7 is sleeved on inner string graphitization furnace body 26, the top of heat exchange sleeve 7 and heat conduction sleeve 15 abuts on the bottom of lifting ring 25, the inner wall of heat conduction sleeve 15 abuts on the outer wall of inner string graphitization furnace body 26, the discharge pipe at the bottom of inner string graphitization furnace body 26 extends out to below heat exchange sleeve through third through hole 16, the inner side of heat exchange plate 14 and second through hole 9;

[0022] Before use, the first input pipe 19 can be communicated with the existing first heat exchange medium input pipeline through the hose 23 thereon, the first output pipe 21 can be communicated with the existing first heat exchange medium output pipeline through the hose 23 thereon, so as to utilize the first heat exchange medium for heat exchange, the second input pipe 20 can be communicated with the existing second heat exchange medium input pipeline through the hose 23 thereon, and the second output pipe 22 can be communicated with the existing second heat exchange medium output pipeline through the hose 23 thereon, so as to utilize the second heat exchange medium for heat exchange. In the initial state, the heat preservation sleeve 6 is located below the inner string graphitization furnace body 26, and in the normal graphitization production, the single-rod hydraulic cylinder 24 can be operated to make the piston rod thereof extend, thereby driving the lifting ring 25 and the inner string graphitization furnace body 26 to move downward as a whole, so that the inner string graphitization furnace body 26 is inserted into the heat preservation sleeve 6, until the lifting ring 25 abuts against the top of the heat preservation sleeve 6, and then the inner string graphitization furnace body 26 can be charged and subjected to graphitization production and processing, and in the process, the heat preservation sleeve 6 can be used for effectively insulating and heat-preserving the same. After the completion of one production, the single-rod hydraulic cylinder 24 can be operated again to make the piston rod thereof retract, thereby driving the lifting ring 25 and the inner string graphitization furnace body 26 to move upward to a suitable height, and then the motor 3 is operated to drive the rotating disc 4 to rotate by 180 degrees, so that the heat exchange sleeve 7 is turned to below the inner string graphitization furnace body 26. Then, the piston rod of the single-rod hydraulic cylinder 24 is extended again to insert the inner string graphitization furnace body 26 into the heat exchange sleeve 7, so that heat exchange can be performed. Specifically, the heat of the inner string graphitization furnace body 26 can be effectively transferred to the first heat exchange pipe 13, the heat exchange plate 14 and the second heat exchange pipe 17 by means of the heat conduction sleeve 15 and the heat conduction fin 18, and the cooperation of the first medium input pipeline, the first input pipe 19, the first ring pipe 10, the plurality of first heat exchange pipes 13, the second ring pipe 11, the first output pipe 21 and the first medium output pipeline can form a flow route of the first heat exchange medium, and the cooperation of the second medium input pipeline, the second input pipe 20, the hollow heat exchange plate 14, the plurality of second heat exchange pipes 17, the third ring pipe 12, the second output pipe 22 and the second medium output pipeline can form a flow route of the second heat exchange medium, so that the heat of the inner string graphitization furnace body 26 can be utilized to simultaneously exchange heat with the two heat exchange media, the waste heat of the inner string graphitization furnace body 26 can be effectively exchanged and recovered into the corresponding heat exchange medium, the waste heat recovery effect is better, the efficiency is higher, and the rapid cooling of the inner string graphitization furnace body 26 is more favorable, thereby being more favorable for subsequent production. After the cooling is completed, the inner string graphitization furnace body 26 is moved upward out of the heat exchange sleeve 7, and then the motor 3 is operated again to drive the rotating disc 4 to reverse by 180 degrees, so that the heat preservation sleeve 6 is turned back to the original position, and then the inner string graphitization furnace body 26 is inserted into the heat preservation sleeve 6 again, and the graphitization production can be continued.Therefore, the inner string graphitization furnace body 26 and the heat preservation sleeve 6 are arranged in a split structure, which is convenient for cooling and waste heat recovery of the inner string graphitization furnace body 26, effectively reduces the burning loss of the heat preservation sleeve 6, improves the service life of the heat preservation sleeve 6, is more practical, and the detachable arrangement between the heat preservation sleeve 6 and the corresponding support seat 5 is also convenient for flexible disassembly and replacement of the heat preservation sleeve 6 when the heat preservation sleeve 6 is damaged, so that the use of the whole device is more flexible and convenient. The heat preservation sleeve 6 can be formed by pouring a conventional refractory material, and the specific selection can be made according to the actual situation, which is not limited here. The heat conduction sleeve 15 and the heat conduction fin 18 are made of a conventional material with good heat conduction performance such as copper. The inner string graphitization furnace body 26 can use existing technology. The first heat exchange medium and the second heat exchange medium can use existing technology, and the two mediums can be the same or different. Specifically, the first heat exchange medium can be a gas, and the second heat exchange medium can be a liquid, so as to cooperate with heat exchange to absorb the waste heat of the inner string graphitization furnace body 26.

[0023] In the embodiment, the outer bottom of the heat preservation sleeve 6 is fixedly connected with a mounting block 28 through a plurality of supporting legs 27, the top of the corresponding support seat 5 of the heat preservation sleeve 6 is fixedly connected with a mounting box 29, the top of the mounting box 29 is open, the mounting block 28 is inserted into the mounting box 29, a double-rod hydraulic cylinder 30 is fixedly arranged on the corresponding support seat 5 of the heat preservation sleeve 6 along the left-right direction, both piston rods of the double-rod hydraulic cylinder 30 are fixedly connected with square limiting frames 31, the limiting frames 31 are sleeved on the outer side of the mounting box 29 on the same side, so that when the heat preservation sleeve 6 needs to be replaced due to damage, the double-rod hydraulic cylinder 30 can be operated to make the piston rod extend, drive the limiting frames 31 to move away from the mounting box 29, thereby releasing the sleeving and locking of the mounting block 28, then the mounting block 28 can be pulled out, and the original heat preservation sleeve 6 can be disassembled. Then, after taking a new heat preservation sleeve 6, the mounting block 28 on the new heat preservation sleeve 6 is aligned and inserted into the mounting box 29, the double-rod hydraulic cylinder 30 is operated to make the piston rod retract, and the two limiting frames 31 are sleeved on the outer side of the mounting box 29 again, so that the limiting frames 31 are sleeved in place while the mounting block 28 is sleeved and locked, thereby completing the fixing and installation of the new heat preservation sleeve 6, and the installation is stable and does not affect the subsequent use. Therefore, the heat preservation sleeve 6 can be flexibly and conveniently disassembled and replaced when needed, so that the use of the whole device is more flexible and convenient.

[0024] In the embodiment, the mounting block 28 is matched with the mounting box 29 to ensure that the mounting block 28 is smoothly inserted into place.

[0025] In the embodiment, the limiting frame 31 is matched with the mounting box 29 to ensure that the limiting frame 31 is smoothly sleeved into place.

[0026] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An internal series graphitization furnace waste heat recovery device characterized by comprising: The utility model provides a heat exchange device of inner string graphitization furnace, including base and the L shape support board of setting at one side of base, the built -in motor of base, the output shaft of motor stretches out base upwards and coaxially fixed connection has the carousel, the left and right sides on the top of carousel all solidly established support seat, one support seat can detachably establish heat -preserving cover, another support seat fixedly sets up and sets up heat exchange cover, the top of heat -preserving cover is open, the bottom center is equipped with first through -hole, the top of heat exchange cover is open, the bottom center is equipped with second through -hole, the lower part of heat exchange cover is solidly equipped with first ring pipe, the upper part is solidly equipped with second ring pipe and third ring pipe from bottom to top in proper order in the inside, the top of first ring pipe is passed through a plurality of first heat exchange pipe and the bottom of second ring pipe intercommunication, the inner bottom of heat exchange cover is solidly equipped with the hollow annular heat exchange board in the coaxial, the top of heat exchange board is fixedly connected with the heat conduction cover of top open, the bottom center of heat conduction cover is equipped with third through -hole, the outside of heat conduction cover is vertically solidly equipped with a plurality of second heat exchange pipe, the bottom end of second heat exchange pipe and the circumferential side of heat exchange board intercommunication, the top end and the inside of third ring pipe intercommunication, a plurality of heat conduction fin is solidly equipped with on the outside of heat conduction cover between adjacent two second heat exchange pipe, heat conduction fin and adjacent first heat exchange pipe fixed connection, the bottom intercommunication of first ring pipe has the first input pipe of stretching out heat exchange cover, the bottom intercommunication of heat exchange board has the second input pipe of stretching out heat exchange cover, the outside intercommunication of second ring pipe has the first output pipe of stretching out heat exchange cover, the outside intercommunication of third ring pipe has the second output pipe of stretching out heat exchange cover, first input pipe, second input pipe, first output pipe and second output pipe all intercommunication has the hose, the horizontal portion of support board is located in the upper of base and is evenly distributed with a plurality of vertical through solidly equipped single -rod hydraulic cylinder on it, the piston rod of single -rod hydraulic cylinder is downwards and fixedly connected with the same lift ring, the inside of lift ring is fixedly sleeved with the inner string graphitization furnace body of in -series, heat -preserving cover and heat exchange cover can be sleeved in the outside of inner string graphitization furnace body, and when heat -preserving cover is sleeved on inner string graphitization furnace body, the top of heat -preserving cover abuts on the bottom of lift ring, the inner wall of heat -preserving cover and the outer wall of inner string graphitization furnace body abut, the discharge pipe of inner string graphitization furnace body bottom is stretched out to heat -preserving cover below through first through -hole, when heat exchange cover is sleeved on inner string graphitization furnace body, the top of heat exchange cover and heat conduction cover abut on the bottom of lift ring, the inner wall of heat conduction cover and the outer wall of inner string graphitization furnace body abut, the discharge pipe of inner string graphitization furnace body bottom is stretched out to heat exchange cover below through third through -hole, the inside of heat exchange board and second through -hole.

2. The inner series graphitization furnace waste heat recovery device according to claim 1, characterized by, The outer bottom of heat -preserving cover is fixedly connected with the mounting block through a plurality of support legs, the top of the support seat corresponding to the heat -preserving cover is fixedly connected with the mounting box, the top of the mounting box is open, the mounting block is inserted into the mounting box, a double -rod hydraulic cylinder is vertically and fixedly arranged on the support seat corresponding to the heat -preserving cover, both piston rods of the double -rod hydraulic cylinder are fixedly connected with square limiting frames, and the limiting frames are sleeved on the outside of the mounting box on the same side.

3. The inner series graphitization furnace waste heat recovery device according to claim 2, characterized by, The mounting block is matched with the mounting box.

4. The inner series graphitization furnace waste heat recovery device according to claim 2, characterized by The limiting frame is matched with the mounting box.

Images