CN117029513B - Waste heat utilization device of tubular furnace - Google Patents

Abstract

The present invention relates to the technical field of waste gas heat utilization, and specifically to a waste heat utilization device for a tubular furnace, comprising an exchange box and a chassis, wherein a heat-conducting liquid is filled inside the exchange box, an exchange pipe is arranged between the exchange box and the chassis to connect them, a heat-absorbing block is arranged inside the chassis, a driving mechanism is arranged on the upper end of the heat-absorbing block, a traction member is also arranged on the heat-absorbing block, and the driving mechanism also drives the heat-absorbing block to rotate on a load-bearing block. According to the temperature of the waste gas, there are five situations: far less than the boiling point of the heat-conducting liquid, less than the boiling point of the heat-conducting liquid, close to the boiling point of the heat-conducting liquid, greater than the boiling point of the heat-conducting liquid, and far greater than the boiling point of the heat-conducting liquid. The three equipment operation modes in the embodiment are adopted to avoid the loss of heat energy and improve the heat exchange efficiency. It can adapt to the waste gas caused by a variety of equipment and has high practicality.

Description

A device for utilizing waste heat from a tubular furnace

Technical Field

The invention relates to the technical field of waste gas heat utilization, and in particular to a tubular furnace waste heat utilization device.

Background technique

Tubular furnaces are used in metallurgy, glass, heat treatment, lithium battery positive and negative electrode materials, new energy, abrasive tools and other industries. They are professional equipment for measuring materials under certain temperature conditions. The furnace has a simple structure, is easy to operate, easy to control, and can produce continuously. Tubular furnaces emit high-temperature exhaust gas, which is usually reused to convert the high temperature in the exhaust gas to achieve the effect of saving energy.

After searching, the application number is CN201420287803.5, which discloses a crude benzene tubular furnace flue gas waste heat utilization system, wherein the flue gas channel of the crude benzene tubular furnace is connected to the shell side inlet of the tubular heat exchanger through an induced draft fan, and a flow equalizer is provided between the induced draft fan and the tubular heat exchanger to disperse the high-temperature flue gas, the shell side outlet of the tubular heat exchanger is connected to the chimney through a pipeline; the outlet of the soft water collection box is connected to the tube side inlet of the tubular heat exchanger through a pump and a pipeline, the tube side outlet of the tubular heat exchanger is connected to a gas-liquid separator, the steam outlet of the gas-liquid separator is connected to the steam inlet of the convection section of the tubular furnace through a pipeline, and the convection section condensate outlet of the tubular furnace is connected to a regenerator; at the same time, the hot water outlet of the steam-water separator is connected to the soft water collection box through a pipeline. By effectively recovering the waste heat of the flue gas, low-pressure steam is generated and supplied to the tubular furnace, forming a self-circulating system, and realizing self-sufficiency and self-surplus of production steam.

The above technical solution adopts a heat exchanger to bring high-temperature gas into contact with low-temperature heat-conducting liquid for heat exchange. The heat-conducting liquid has the characteristics of high boiling point and low thermal melting point. The existing waste gas waste heat utilization device needs to face the waste gas generated by different equipment for heat exchange during production. Therefore, the temperature of the waste gas is also different. When starting the heat exchange equipment, regardless of the temperature of the waste gas, the electric energy consumed by the equipment is the same. If the temperature of the waste gas is lower than the boiling point of the heat-conducting liquid, there is no need to use the heat-conducting liquid for heat exchange. Starting the equipment will cause a waste of electric energy. If the temperature of the waste gas is higher than the boiling point of the heat-conducting liquid, there will be a problem of low thermal energy conversion rate.

Summary of the invention

In view of the existing deficiencies, the present invention provides a device for utilizing waste heat from a tubular furnace.

To achieve the above object, the technical solution adopted by the present invention is:

A device for utilizing waste heat from a tubular furnace comprises an exchange box and a chassis. A heat-conducting liquid is filled inside the exchange box. An exchange pipe is provided between the exchange box and the chassis to connect them. A heat-absorbing block is provided inside the chassis. A driving mechanism is provided at the upper end of the heat-absorbing block. A traction member is also provided on the heat-absorbing block. The driving mechanism cooperates with the traction member to expand the heating area of the heat-absorbing block. The exchange pipe is fixedly connected to a load-bearing block for carrying the heat-absorbing block at a port inside the chassis. The driving mechanism also drives the heat-absorbing block to rotate on the load-bearing block.

Preferably, a blower and a heat exchanger are further included, a pipe connecting the heat exchanger and the exchange box is provided between them, a pipe connecting the blower and the chassis is provided between them, an exhaust gas inlet pipe is connected to the end of the exchange box away from the heat exchanger, a bypass pipe is connected between the exhaust gas inlet pipe and the exchange pipe, a hot water outflow pipe is connected to the end of the chassis away from the blower, a hot liquid outflow pipe is connected to the end of the heat exchanger away from the exchange box, a heat transfer liquid storage box is provided on the side of the exchange box, a conduction pipe is connected between the exchange box and the heat transfer liquid storage box, a valve is provided between each of the pipes, and valves are provided between the exhaust gas inlet pipe, the bypass pipe, the hot water outflow pipe and the hot liquid outflow pipe.

Preferably, the heat absorption block includes a main frame and a plurality of fins, the upper end of the main frame is fixedly connected to a connecting piece, each of the fins is rotatably connected to the bottom end of the main frame, the main frame is provided with a slide groove for sliding one end of the traction piece, and the other end of the traction piece is movably connected to the fin.

Preferably, the traction member includes a first plate, a second plate and a traction rope, a traction rope is connected between the first plate and the second plate, the first plate is slidably connected to the slide groove, the second plate is fixedly connected to the fin, each side wall of the first plate extends inward and intersects at a point to form a slide plate, and a conduction rod is fixedly connected to the upper end of the slide plate.

Preferably, the conduction rod movably passes through the upper wall of the chassis, the upper end of the connecting piece is fixedly connected to a driven gear through a connecting rod, a limiting ring is extended from the upper end of the driven gear, the diameter of the limiting ring is larger than the driven gear, and the limiting ring is rotatably connected to a groove body opened inside the upper wall of the chassis.

Preferably, the driving mechanism includes a first motor and a second motor, the first motor and the second motor are both fixedly connected to the upper end of the chassis, the upper wall of the chassis is rotatably connected with a first rod and a screw rod, the lower end of the first rod rotates and passes through the upper wall of the chassis, and the end is fixedly connected with a driving gear, the driving gear and the driven gear are meshingly connected, the upper end of the first rod and the output shaft of the first motor are both fixedly connected with a first umbrella ruler, the two first umbrella rulers are meshingly connected, the upper end of the screw rod and the output shaft of the second motor are both fixedly connected with a second umbrella ruler, the two second umbrella rulers are meshingly connected.

Preferably, the connecting rod is extended to the outside of the chassis and is fixedly connected to a support plate, a traction rod is tightly arranged at the lower end of the support plate, the traction rod is fixedly connected to a second rod at the rod body, a screw sleeve is arranged at the end of the second rod, and the screw sleeve is threadedly connected to the screw rod.

Preferably, an electric slide rail is provided on the inner wall of the exchange pipe, and a guide block of the electric slide rail is fixedly connected with the inner exchange pipe to form a transition fit with the exchange pipe.

Preferably, the load-bearing block is arranged in an inverted trapezoidal shape, the load-bearing block is hollowed out to form a collecting and dividing groove, the upper end of the load-bearing block is fixedly connected to a load-bearing rod, the load-bearing rod is formed by a plurality of rod bodies being staggered, a round rod is fixedly connected at the center, a round hole is opened at the lower end of the main frame, and the round rod is rotatably connected in the round hole.

Preferably, the upper end of the chassis is fixedly connected to a casing, and the driving mechanism is arranged inside the casing.

Compared with the prior art, the present invention has the following beneficial effects:

1. According to the temperature of the exhaust gas, there are five situations: far less than the boiling point of the heat-conducting liquid, less than the boiling point of the heat-conducting liquid, close to the boiling point of the heat-conducting liquid, greater than the boiling point of the heat-conducting liquid, and far greater than the boiling point of the heat-conducting liquid. The three equipment operation modes in the embodiment are adopted to avoid the loss of heat energy, improve the heat exchange efficiency, can adapt to the exhaust gas caused by a variety of equipment, and have high practicality.

2. The load-bearing block is used to share the force caused by the huge weight of the heat-absorbing block hanging on the upper wall of the chassis. As shown in the figure, the shape of the load-bearing block is an inverted trapezoid. Its collecting and distributing grooves can diffuse the hot air, and with the open state of the fins, the heat exchange efficiency between the hot air and the heat-absorbing block is further improved.

3. Drive the first motor to operate, and rotate through the meshing of the two first umbrella scales, thereby driving the driving gear and the driven gear to rotate, so that the heat absorption block rotates, and at the same time start the second motor to drive the screw rod and the screw rod sleeve to move upward, provide an upward force to the support plate, so that it moves in the same direction. As shown in the figure, it can be seen that the first plate is driven to move, and then the fins are lifted along the direction of the rotating shaft through the traction member. As shown in the figure, the overall heating area of the heat absorption block is expanded, and its heat exchange efficiency is improved. When the blower blows, it is folded to reduce the contact area between the heat absorption block and the outside air, so that the heat dissipation time of the heating block itself is increased, and then the time for the equipment to provide hot air is also increased.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a tubular furnace waste heat utilization device according to the present invention;

FIG2 is a schematic structural diagram of a driving assembly of a tubular furnace waste heat utilization device according to the present invention;

FIG3 is an enlarged structural schematic diagram of a portion a in FIG2 of a tubular furnace waste heat utilization device according to the present invention;

FIG4 is an enlarged structural schematic diagram of a tubular furnace waste heat utilization device according to the present invention at point b in FIG2 ;

FIG5 is a schematic structural diagram of a heat absorbing block of a waste heat utilization device for a tubular furnace according to the present invention;

FIG6 is a schematic structural diagram of a tubular furnace waste heat utilization device enlarged at point d in FIG5 according to the present invention;

FIG7 is a schematic structural diagram of a conduction rod of a tubular furnace waste heat utilization device according to the present invention;

FIG8 is a schematic diagram of the structure of a tubular furnace waste heat utilization device enlarged at point e in FIG7 according to the present invention;

FIG9 is a schematic structural diagram of a traction rope of a tubular furnace waste heat utilization device according to the present invention;

FIG10 is a schematic structural diagram of a fin expansion form of a tubular furnace waste heat utilization device according to the present invention;

FIG. 11 is an enlarged structural schematic diagram of point c in FIG. 2 of a tubular furnace waste heat utilization device according to the present invention.

In the figure: 1, exchange box; 2, exhaust gas inlet pipe; 3, heat transfer liquid storage box; 4, conduction pipe; 5, load-bearing block; 501, round rod; 502, load-bearing rod; 503, collection and distribution tank; 6, diversion pipe; 7, chassis; 8, casing; 9, blower; 10, heat exchanger; 11, hot liquid outflow pipe; 12, hot gas outflow pipe; 13, driving mechanism; 1301, first motor; 1302, first umbrella ruler; 1303, first rod; 1304, driving gear; 1305, connecting rod; 1306, driven gear; 1307, limit Position ring; 1308, conduction rod; 1309, second rod; 1310, screw rod; 1311, traction rod; 1312, screw rod sleeve; 1313, second motor; 1314, second umbrella ruler; 1315, support plate; 14, heat absorption block; 1401, main frame; 1402, fin; 1403, round hole; 15, connector; 1501, slide groove; 16, exchange pipe; 17, electric slide rail; 18, inner exchange pipe; 19, traction member; 1901, first plate; 1902, second plate; 1903, traction rope; 20, slide plate.

Detailed ways

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

Example

As shown in Figures 1 to 10, a waste heat utilization device for a tubular furnace includes an exchange box 1 and a chassis 7. The exchange box 1 is filled with a heat-conducting liquid. An exchange pipe 16 is provided between the exchange box 1 and the chassis 7 to connect them. A heat absorbing block 14 is provided inside the chassis 7. A driving mechanism 13 is provided at the upper end of the heat absorbing block 14. A traction member 19 is also provided on the heat absorbing block 14. The driving mechanism 13 cooperates with the traction member 19 to expand the heating area of the heat absorbing block 14. The exchange pipe 16 is located at the internal port of the chassis 7 and is fixedly connected to a load-bearing block 5 for carrying the heat absorbing block 14. The driving mechanism 13 also drives the heat absorbing block 14 to rotate on the load-bearing block 5. By expanding the heating area of the heat absorbing block 14, the heat exchange efficiency can be improved.

In this embodiment, a blower 9 and a heat exchanger 10 are also included. A pipe is provided between the heat exchanger 10 and the exchange box 1 to connect them. A pipe is provided between the blower 9 and the chassis 7 to connect them. The end of the exchange box 1 away from the heat exchanger 10 is connected to the exhaust gas inlet pipe 2. A bypass pipe 6 is connected between the exhaust gas inlet pipe 2 and the exchange pipe 16. When the exhaust gas temperature is much lower than the boiling point of the heat-conducting liquid, a long heat exchange time is required to reach the boiling point of the heat-conducting liquid. Therefore, there is no need to quote the heat-conducting liquid. The exhaust gas is introduced from the bypass pipe 6 into the inside of the chassis 7, and the exhaust gas is brought into contact with the heat absorbing block 14. The material of the heat absorbing block 14 is a material with good thermal conductivity and high melting point. , the exhaust gas and the heat absorbing block 14 realize heat exchange, the end of the chassis 7 away from the blower 9 is connected to a hot air outflow pipe 12, the end of the heat exchanger 10 away from the exchange box 1 is connected to a hot liquid outflow pipe 11, a heat transfer liquid storage box 3 is arranged on the side of the exchange box 1, and the exchange box 1 and the heat transfer liquid storage box 3 are connected with a conduction pipe 4, a valve is arranged between each pipe, the exhaust gas inlet pipe 2, the diversion pipe 6, the hot air outflow pipe 12 and the hot liquid outflow pipe 11 are provided with valves, and the valves are arranged between the exhaust gas inlet pipe 2, the diversion pipe 6, the hot air outflow pipe 12 and the hot liquid outflow pipe 11 to prevent the exhaust gas from flowing back, and a valve is arranged between each pipe, so that the gas can directly enter the exchange box 1 and the chassis 7, thereby cooperating with the three usage scenarios of the equipment.

In this embodiment, the heat absorption block 14 includes a main frame 1401 and a plurality of fins 1402. The upper end of the main frame 1401 is fixedly connected to a connecting member 15. Each fin 1402 is rotatably connected to the bottom end of the main frame 1401. The main frame 1401 is provided with a slide groove 1501 for sliding one end of the traction member 19. The other end of the traction member 19 is movably connected to the fin 1402. The traction member 19 includes a first plate 1901, a second plate 1902 and a traction rope 1903. The first plate 1901 is provided with a connecting member 15. A traction rope 1903 is connected between the first plate 1901 and the second plate 1902. The first plate 1901 is slidably connected to the slide groove 1501, and the second plate 1902 is fixedly connected to the fin 1402. As shown in the figure, the first plate 1901 is driven to move, and then the fin 1402 is lifted along the axis direction through the traction member 19. As shown in the figure, the overall heating area of the heat absorbing block 14 is expanded, so that its heat exchange efficiency is improved. When the blower 9 blows, it is folded to reduce the heat absorbing block 14 is in contact with the outside air, so that the heat dissipation time of the heating block itself is increased, and then the time for the device to provide hot air is also increased. Each side wall of the first plate 1901 extends inward and intersects at a point to form a slide plate 20. The upper end of the slide plate 20 is fixedly connected to a conduction rod 1308, and the conduction rod 1308 is movable through the upper wall of the chassis 7. The upper end of the connecting member 15 is fixedly connected to a driven gear 1306 through a connecting rod 1305, which drives the first motor 1301 to operate. The two first umbrella scales 1302 mesh and rotate, thereby driving the driving gear 1304 and the driven gear 1306 to rotate, so that the heat absorbing block 14 rotates, and at the same time the second motor 1313 is started to drive the screw rod 1310 and the screw rod sleeve 1312 to move upward, providing an upward force to the support plate 1315 to move in the same direction. A limit ring 1307 extends from the upper end of the driven gear 1306. The diameter of the limit ring 1307 is larger than that of the driven gear 1306. The limit ring 1307 is rotatably connected to the machine On the groove body opened inside the upper wall of the box 7, the driving mechanism 13 includes a first motor 1301 and a second motor 1313, the first motor 1301 and the second motor 1313 are both fixedly connected to the upper end of the chassis 7, the upper wall of the chassis 7 is rotatably connected with a first rod 1303 and a screw rod 1310, the lower end of the first rod 1303 rotates and penetrates the upper wall of the chassis 7, and the end is fixedly connected with a driving gear 1304, the driving gear 1304 and the driven gear 1306 are meshed and connected, and the upper end of the first rod 1303 is rotated and penetrates the upper wall of the chassis 7, and the end is fixedly connected with a driving gear 1304, and the driving gear 1304 is meshed and connected with the driven gear 1306. The first end and the output shaft of the first motor 1301 are fixedly connected with the first umbrella scale 1302, the two first umbrella scales 1302 are meshedly connected, the upper end of the screw rod 1310 and the output shaft of the second motor 1313 are fixedly connected with the second umbrella scale 1314, the two second umbrella scales 1314 are meshedly connected, the connecting rod 1305 extends to the rod body outside the chassis 7 and is fixedly connected with a support plate 1315, the lower end of the support plate 1315 is tightly provided with a traction rod 1311, and the rod of the traction rod 1311 The second rod 1309 is fixedly connected to the second rod 1309, and a screw sleeve 1312 is provided at the end of the second rod 1309. The screw sleeve 1312 is threadedly connected to the screw rod 1310, driving the first motor 1301 to operate, and the two first umbrella scales 1302 are engaged and rotated, thereby driving the driving gear 1304 and the driven gear 1306 to rotate, so that the heat absorption block 14 rotates, and the second motor 1313 is started at the same time, driving the screw rod 1310 and the screw sleeve 1312 to move upward, providing a support plate 1315 with a rotation. The force on the heat absorbing block 14 causes it to move in the same direction, as shown in the figure, driving the first plate 1901 to move, and then the fins 1402 are lifted along the axis of rotation through the traction member 19, as shown in the figure, thereby expanding the overall heating area of the heat absorbing block 14 and improving its heat exchange efficiency. When the blower 9 blows, it is folded to reduce the contact area between the heat absorbing block 14 and the outside air, thereby increasing the heat dissipation time of the heating block itself, and thereby increasing the time the device provides hot air.

In this embodiment, an electric slide rail 17 is provided on the inner wall of the exchange pipe 16, and a guide block of the electric slide rail 17 is fixedly connected with the transition fit between the inner exchange pipe 18 and the exchange pipe 16. The load-bearing block 5 is arranged in an inverted trapezoidal shape, and the load-bearing block 5 is hollowed out to form a collecting and distributing groove 503. The upper end of the load-bearing block 5 is fixedly connected with a load-bearing rod 502, and the load-bearing rod 502 is formed by a plurality of rod bodies being staggered, and a round rod 501 is fixedly connected at the center thereof. A round hole 1403 is provided at the lower end of the main frame body 1401, and the round rod 501 is rotatably connected in the round hole 1403. The load-bearing block 5 is used to share the force caused by the huge weight of the heat absorption block 14 suspended on the upper wall of the chassis 7. At the same time, as shown in the figure, the shape of the load-bearing block 5 is an inverted trapezoidal shape, and its collecting and distributing groove 503 can diffuse the hot air, and cooperate with the open state of the fins 1402 to further improve the heat exchange efficiency between the hot air and the heat absorption block 14.

In this embodiment, the upper end of the case 7 is fixedly connected to the housing 8 , and the driving mechanism 13 is disposed inside the housing 8 .

The working principle of the waste heat utilization device of a tubular furnace is as follows: the waste gas enters the exchange box 1, and then enters the low-temperature heat-conducting liquid for heat exchange. After a certain period of time, the high-temperature heat-conducting liquid enters the heat exchanger 10 for heat exchange. The temperature of the waste gas may be in the following five situations: far less than the boiling point of the heat-conducting liquid, less than the boiling point of the heat-conducting liquid, close to the boiling point of the heat-conducting liquid, greater than the boiling point of the heat-conducting liquid, and far greater than the boiling point of the heat-conducting liquid.

The first mode of operation of the equipment: when the exhaust gas temperature is much lower than the boiling point of the heat-conducting liquid, a long heat exchange time is required to reach the boiling point of the heat-conducting liquid. Therefore, there is no need to use the heat-conducting liquid. The exhaust gas is introduced from the shunt pipe 6 into the inside of the chassis 7, and the exhaust gas is contacted with the heat-absorbing block 14. The material of the heat-absorbing block 14 is a material with good thermal conductivity and high melting point. The exhaust gas and the heat-absorbing block 14 realize heat exchange. When the temperature is transferred to the heat-absorbing block 14, the blower 9 is started at this time. After the cold air contacts the heat-absorbing block 14, it is converted into hot air and blown out from the hot air outflow pipe 12. The hot air can be used in the workshop production process. The heat-absorbing block 14 is coated with a smooth coating to avoid contamination of floating objects in the exhaust gas. After the heat exchange is realized, the floating objects in the exhaust gas will fall into the chassis 7 for unified cleaning, thereby converting the exhaust gas containing floating objects and harmful substances into clean hot air, and heat exchange is realized, solving the problem of electric energy waste mentioned in the background technology.

The second operation mode of the device: when the exhaust gas temperature is lower than the boiling point of the heat-conducting liquid, when the exhaust gas temperature is close to the boiling point of the heat-conducting liquid, and when the exhaust gas temperature is higher than the boiling point of the heat-conducting liquid, in the above cases, when the exhaust gas exchanges heat with the heat-conducting liquid, it takes a certain amount of time to heat the heat-conducting liquid to the boiling point. Therefore, the exhaust gas directly flows from the exhaust gas inlet pipe 2 into the exchange box 1 filled with the heat-conducting liquid, firstly heats the heat-conducting liquid to the boiling point, and then transports the boiling liquid to the heat exchanger 10 for heat exchange into a high-temperature liquid, and then flows out of the hot liquid outlet pipe 11. The heat transfer liquid is unable to absorb more heat, and the high-temperature exhaust gas will flow into the chassis 7 through the exchange pipe 16. The heat absorbing block 14 exchanges the heat that the heat transfer liquid cannot absorb, and converts it into hot air that flows out from the hot air outflow pipe 12. When the heat transfer liquid reaches the boiling point and cannot absorb more heat, the heat absorbing block 14 is set to avoid waste of heat energy. There is no need to stop the heat exchange equipment. When the heat transfer liquid reaches room temperature, it can be used, which saves time and improves heat exchange efficiency.

The third operating mode of the equipment: when the exhaust gas temperature is much higher than the boiling point of the heat-conducting liquid, in the above situation, when the exhaust gas exchanges heat with the heat-conducting liquid, the heat-conducting liquid will reach the boiling point in a very short time. The material of the heat-absorbing block 14 can be iron, etc., whose melting point temperature is much higher than the boiling point of the heat-conducting liquid. The exhaust gas enters from the exhaust gas inlet pipe 2 and directly enters the chassis 7. The high temperature is first absorbed by the heat-absorbing block 14 for heat exchange. After the heat exchange, the cooled gas enters the exchange box 1 through the high-temperature resistant motor inside the exchange pipe 16. The port of the inner exchange pipe 18 is extended into the heat-conducting liquid through the electric slide rail 17, so that the remaining high-temperature exhaust gas is in full contact with the heat-conducting liquid. After it is heated to the boiling point, the heat-conducting liquid is poured into the heat exchange equipment for heat exchange, thereby solving the problem of heat energy loss mentioned in the background technology and improving the heat exchange efficiency of the equipment.

Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the protection scope of the present invention.

Claims (2)

1. The utility model provides a tubular furnace waste heat utilization device, includes exchange box (1), quick-witted case (7), heat conduction liquid, its characterized in that are equipped with to exchange box (1) inside: an exchange pipeline (16) which is communicated with the exchange box (1) is arranged between the exchange box and the machine box (7), a heat absorption block (14) is arranged in the machine box (7), a driving mechanism (13) is arranged at the upper end of the heat absorption block (14), a traction piece (19) is further arranged on the heat absorption block (14), the driving mechanism (13) is matched with the traction piece (19) to enlarge the heating area of the heat absorption block (14), a bearing block (5) for bearing the heat absorption block (14) is fixedly connected to the position of an inner port of the machine box (7) at the exchange pipeline (16), The driving mechanism (13) drives the heat absorbing block (14) to rotate on the bearing block (5), the heat absorbing block further comprises a blower (9) and a heat exchanger (10), a pipeline which is communicated with the heat exchanger (10) is arranged between the heat exchanger (10) and the cabinet (7), a pipeline which is communicated with the blower (9) is arranged between the blower and the cabinet (7), an exhaust gas inlet pipeline (2) is communicated with the end part of the cabinet (1) far away from the heat exchanger (10), a diversion pipeline (6) is communicated between the exhaust gas inlet pipeline (2) and the exchange pipeline (16), a hot gas outlet pipeline (12) is communicated with the end part of the cabinet (7) far away from the blower (9), The end part of the heat exchanger (10) far away from the exchange box (1) is communicated with a hot liquid outlet pipeline (11), the side edge of the exchange box (1) is provided with a heat-conducting liquid storage box (3), the exchange box (1) is communicated with a conducting pipeline (4) in the heat-conducting liquid storage box (3), a valve is arranged between each pipeline, a valve is arranged between the waste gas inlet pipeline (2), a diversion pipeline (6), a hot gas outlet pipeline (12) and the hot liquid outlet pipeline (11), a high-temperature-resistant fan is arranged in the exchange pipeline (16), the heat absorption block (14) comprises a main frame body (1401) and a plurality of fins (1402), the upper end of the main frame body (1401) is fixedly connected with a connecting piece (15), each fin (1402) is rotationally connected to the bottom end of the main frame body (1401), the main frame body (1401) is provided with a chute (1501) for sliding one end of a traction piece (19), the other end of the traction piece (19) is movably connected to the fin (1402), the traction piece (19) comprises a first plate (1901), a second plate (1902) and a traction rope (1903), the traction rope (1903) is connected between the first plate (1901) and the second plate (1902), the first plate (1901) is connected to the chute (1501) in a sliding way, The second plate (1902) is fixedly connected to the fins (1402), each side wall of the first plate (1901) extends inwards to be connected to a point to form a sliding plate (20), the upper end of the sliding plate (20) is fixedly connected with a conducting rod (1308), the conducting rod (1308) penetrates through the upper wall of the case (7) in a movable mode, the upper end of the connecting piece (15) is fixedly connected with a driven gear (1306) through a connecting rod (1305), the upper end of the driven gear (1306) extends to form a limiting ring (1307), the diameter of the limiting ring (1307) is larger than that of the driven gear (1306), The limiting ring (1307) is rotationally connected to a groove body formed in the upper wall of the case (7), the driving mechanism (13) comprises a first motor (1301) and a second motor (1313), the first motor (1301) and the second motor (1313) are fixedly connected to the upper end of the case (7), the upper wall of the case (7) is rotationally connected with a first rod (1303) and a screw rod (1310), the lower end of the first rod (1303) rotationally penetrates through the upper wall of the case (7), the end part of the driving mechanism is fixedly connected with a driving gear (1304), the driving gear (1304) is in meshed connection with a driven gear (1306), The upper end of the first rod (1303) and the output shaft of the first motor (1301) are fixedly connected with first umbrella rulers (1302), the two first umbrella rulers (1302) are connected in a meshed mode, the upper end of the screw rod (1310) and the output shaft of the second motor (1313) are fixedly connected with second umbrella rulers (1314), the two second umbrella rulers (1314) are connected in a meshed mode, a rod body part of the connecting rod (1305) extending to the outer part of the machine box (7) is fixedly connected with a support plate (1315), the lower end of the support plate (1315) is abutted to be provided with a traction rod (1311), The utility model discloses a traction rod, including traction rod (1311), shaft fixedly connected with second pole (1309), the tip of second pole (1309) is provided with screw sleeve (1312), screw sleeve (1312) and lead screw (1310) threaded connection, the inner wall of exchange pipeline (16) is provided with electronic slide rail (17), transition fit between exchange pipeline (18) and exchange pipeline (16) in the guide block fixedly connected with of electronic slide rail (17), bearing block (5) are the setting of trapezoid body, bearing block (5) fretwork setting is formed with collection groove (503), the upper end fixedly connected with bearing rod (502) of bearing block (5), the bearing rods (502) are formed by staggering a plurality of rod bodies, a round rod (501) is fixedly connected to the center of the bearing rods, a round hole (1403) is formed in the lower end of the main frame body (1401), and the round rod (501) is rotatably connected in the round hole (1403).

2. The tube furnace waste heat utilization device according to claim 1, wherein: the upper end of the case (7) is fixedly connected with a case (8), and the driving mechanism (13) is arranged inside the case (8).