A system for utilizing sensible heat of calcium carbide based on continuous discharging

Abstract

The present invention relates to calcium carbide sensible heat utilization technology, and specifically to a calcium carbide sensible heat utilization system based on continuous discharging. A calcium carbide sensible heat utilization system based on continuous discharging includes a calcium carbide furnace, a tundish, a heat extraction device and a plate crushing device. The calcium carbide is connected to the tundish through a chute, and the tundish is connected to the heat extraction device through a diverter trough; the furnace gas enters the heat extraction device after heat exchange in a heat exchanger; the heat extraction device includes a heat extraction furnace, a diverter trough and a heat extraction roller are arranged in the heat extraction furnace, and a vertical diverter plate is arranged in the middle of the diverter trough, so that the molten calcium carbide flowing out of the tundish is divided into multiple belt-type molten calcium carbide flows; the heat extraction roller is connected to the plate crushing device; the furnace gas after heat exchange in the heat exchanger enters the upper and lower furnace walls at one end of the heat extraction furnace from the heat extraction pipeline, and is discharged from the other end of the heat extraction furnace and enters the recovery pipeline. Based on the continuous discharging of molten calcium carbide, the system can greatly improve production efficiency; at the same time, the sensible heat of calcium carbide can be utilized in all stages, and the heat utilization efficiency is higher.

Description

Technical Field

[0001] The invention relates to a calcium carbide sensible heat utilization technology, and in particular to a calcium carbide sensible heat utilization system based on continuous discharging. Background Art

[0002] Calcium carbide is an important chemical raw material, widely used in the construction, furniture, automobile, electronics and other industries. Calcium carbide is formed by calcium oxide and carbon raw materials in the calcium carbide furnace under the condition of releasing huge energy under the high-voltage electrode, so the calcium carbide industry is a high-energy consumption industry. In the calcium carbide production process of the prior art, whenever the calcium carbide liquid level in the calcium carbide furnace reaches a certain height, the calcium carbide furnace eye is poked open to allow the molten calcium carbide to flow into several calcium carbide pots through the calcium carbide chute. After a long period of natural cooling, after reaching a certain temperature, the pot is turned over and enters the jaw crusher to break the large calcium carbide lumps into fragments that meet the required particle size. Therefore, the calcium carbide production in the prior art is intermittent, and the calcium carbide lumps in the calcium carbide pot cannot be discharged before cooling. This discharge method obviously greatly reduces production efficiency.

[0003] In terms of the utilization of sensible heat of calcium carbide, there are two main aspects: (1) High temperature stage: The temperature of molten calcium carbide after it flows out of the calcium carbide furnace is about 1800℃. Due to the huge temperature difference between the surrounding environment and the calcium carbide pot, the temperature of the molten calcium carbide close to the outer wall of the calcium carbide pot drops to 1200℃ the moment it flows into the calcium carbide pot. Since the discharge temperature of calcium carbide is very high, the heat taken away by calcium carbide when it is discharged from the furnace accounts for about 20% of the total energy consumption of calcium carbide, and the heat taken away by calcium carbide when it is discharged is mostly concentrated in this stage. This stage lasts for a very short time, and the temperature of calcium carbide almost drops suddenly, making it extremely difficult to utilize the waste heat. At the same time, molten calcium carbide will react with air under high temperature conditions to produce calcium carbonate, which in turn affects the quality of calcium carbide, which also limits the application of sensible heat of calcium carbide in the high temperature stage. (2) Low temperature stage: When the temperature of the molten calcium carbide on the outer wall of the calcium carbide pot drops to about 600℃, the temperature begins to stabilize. About an hour after the discharge, the temperature of the outer wall of the calcium carbide pot reaches about 300℃. The difficulty of heat extraction is reduced at this stage, but due to the great thickness of the calcium carbide mass and the low thermal conductivity of calcium carbide, the thermal efficiency of heat extraction by convection heat exchange is very low, and the heat quality extracted is not high. At the same time, since calcium carbide will form calcium cyanamide with nitrogen at around 600°C, the change in composition will affect the gas production rate of calcium carbide, which greatly limits the feasibility of using air convection heat exchange to extract sensible heat from calcium carbide. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a system for utilizing the sensible heat of calcium carbide based on continuous discharging. In this system, the furnace gas produced in the calcium carbide pot is used as a heat medium, thereby avoiding the problem that air reacts with calcium carbide as a heat medium and affects product quality. At the same time, the molten calcium carbide can be continuously discharged, which can greatly improve production efficiency. At the same time, the sensible heat of calcium carbide can be utilized in all stages, and the heat utilization efficiency is higher.

[0005] In order to solve the problems of the prior art, the present invention discloses a calcium carbide sensible heat utilization system based on continuous discharging, comprising a calcium carbide furnace, a tundish, a heat extraction device and a plate crushing device, the furnace eye of the calcium carbide furnace is connected to a chute, the chute is connected to the tundish via a pipeline, and the tundish is connected to the heat extraction device via a diversion trough; the furnace gas of the calcium carbide furnace enters the heat exchanger through a heat exchange pipeline, and the furnace gas after heat exchange in the heat exchanger enters the heat extraction device through a heat extraction pipeline.

[0006] The bottom of the tundish is an inclined structure, with the side facing the calcium carbide furnace being higher and the side facing the heat extraction device being lower. The molten calcium carbide entering from the chute remains in a molten state in the tundish.

[0007] The heat extraction device comprises a heat extraction furnace, in which a heat extraction roller is arranged, the inlet end of the heat extraction furnace is connected to the intermediate ladle through a diverter groove, the diverter groove is a groove-shaped structure, a vertical diverter plate is arranged in the middle of the diverter groove, and diverter holes are arranged at intervals on the diverter plate, so that the molten calcium carbide flowing out of the intermediate ladle is divided into multiple belt-type molten calcium carbide flows; the inlet end of the heat extraction roller is connected to the diverter groove, and the outlet end is connected to a crushing plate device, and the multiple belt-type molten calcium carbide flows are gradually cooled and moved to the position of the crushing plate device on the heat extraction roller; the furnace gas after heat exchange in the heat exchanger enters the upper and lower furnace walls of the air inlet end of the heat extraction furnace from the heat extraction pipeline, and is discharged from the exhaust end of the heat extraction furnace to enter the recovery pipeline; an air collecting hood is set on the outside of the heat extraction furnace, a monitoring pipeline is arranged on the outside of the air collecting hood, and a CO concentration meter is arranged on the monitoring pipeline.

[0008] A limit wall is arranged between the plate crushing device and the heat extraction roller, and a limit hole is arranged on the limit wall. The cooled calcium carbide plate is crushed by the plate crushing device; and an isolation wall is arranged between the heat exchanger and the heat extraction device.

[0009] Preferably, the starting section of the chute is an open trough-like structure for receiving the molten calcium carbide at the eye of the calcium carbide furnace, and the remaining section is a closed structure for transporting the molten calcium carbide to the intermediate package. The outside of the chute is coated with thermal insulation cotton, and the starting section of the chute accounts for 1 / 3 of the total length.

[0010] Preferably, the tundish is made of high-temperature alloy steel resistant to 1800°C, and comprises a cover and a body. The cover and the body are connected in a concave-convex zigzag manner, and a hook is provided on the cover.

[0011] Preferably, the upper and lower furnace walls of the heat extraction furnace in the heat extraction device are of a wavy structure, and the furnace gas after heat exchange moves along the upper and lower furnace walls, and its movement direction is opposite to that of the calcium carbide plate.

[0012] Preferably, a plurality of diversion holes are arranged on the diversion plate in the diversion trough.

[0013] Preferably, the plate breaking device is a plate breaking knife that falls periodically.

[0014] Preferably, the height of the limiting hole on the limiting wall is greater than the thickness of the calcium carbide plate but less than 1.5 times the thickness of the calcium carbide plate.

[0015] Preferably, the gas collecting hood includes an upper hood and a lower hood, the upper hood is a closed structure, and a monitoring pipe is connected to the upper hood; the lower hood is connected below the upper hood, and an inlet and outlet are reserved at the inlet and outlet position of the calcium carbide plate, and an inspection port is also provided on the lower hood.

[0016] Preferably, the outside of the diversion trough is coated with thermal insulation cotton.

[0017] In the present invention, on the one hand, the continuous discharging of the molten calcium carbide production process is realized, which abandons the traditional calcium carbide pot cooling method, but adopts molten calcium carbide to be shunted into multiple belt-type molten calcium carbide flows in the shunt trough, and the molten calcium carbide flow with thinner thickness and narrower width is obviously easier to cool, and the molten calcium carbide forms a plate-like solid from the liquid in the shunt trough. And gradually move and gradually cool down on the heat-taking roller, and finally when moving to the end of the heat-taking roller, the calcium carbide plate after cooling is broken into small pieces by the periodically falling plate breaking device, which is convenient for later use. In the present invention, on the other hand, furnace gas is used to utilize the waste heat in the cooling process of molten calcium carbide. First, the main components of furnace gas are carbon monoxide (usually accounting for 70-90% of the furnace gas volume), carbon dioxide, hydrogen and nitrogen, which will not react with high-temperature molten calcium carbide. After the furnace gas is produced from the calcium carbide furnace, it first passes through the heat exchanger for heat exchange. The heat exchanger absorbs the heat carried by the furnace gas, and the furnace gas temperature drops. Then it enters the heat extraction furnace through the heat extraction pipe, and moves along the upper and lower furnace walls of the heat extraction furnace, and moves in the opposite direction of the calcium carbide plate discharge. In this process, it fully absorbs the sensible heat of the calcium carbide, and the furnace gas temperature gradually increases. It is recycled through the recovery pipe, or returned to the limestone calcination in the calcium carbide production, or used for boiler power generation. The thermal quality of the waste heat extracted is also greatly improved.

[0018] The beneficial effects of the present invention are: 1. It realizes the continuous discharging of calcium carbide cooling, and compared with the method of cooling the calcium carbide pot one by one and discharging intermittently in the prior art, the cooling efficiency is greatly improved; 2. The furnace gas generated in the calcium carbide furnace is taken as the heat medium, which is locally sourced and will not react with the molten calcium carbide, thereby ensuring product quality; 3. The heat extraction process covers the entire high-temperature stage and the low-temperature stage, and the heat utilization efficiency is higher; 4. The molten calcium carbide is converted into a calcium carbide plate structure with high cooling efficiency, which greatly shortens the production time of calcium carbide and improves production efficiency; 5. An intermediate package is arranged between the calcium carbide furnace and the diversion trough. Due to the good thermal insulation effect, it can greatly alleviate the temperature drop of the molten calcium carbide after flowing out of the furnace eye of the calcium carbide furnace, laying the foundation for the subsequent transformation of the calcium carbide from molten liquid to plate and strip; 6. Multiple safety production protection measures are set to avoid furnace gas leakage and water leakage in the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a top view structural schematic diagram of the self-dividing flow trough, heat extraction device and plate breaking device in the present invention;

[0021] Figure 3 It is a schematic diagram of the upper cover structure of the gas collecting cover in the present invention;

[0022] Figure 4 It is a schematic diagram of the lower cover structure of the gas collecting cover in the present invention;

[0023] Figure 5 It is a schematic diagram of the structure of the tundish cover in the present invention;

[0024] Figure 6 It is a schematic structural diagram of the intermediate package body in the present invention.

[0025] Reference numerals:

[0026] 1. Calcium carbide furnace; 2. Tundish; 3. Heat extraction device; 4. Plate crushing device; 5. Chute; 6. Diverter trough; 7. Heat exchange pipeline; 8. Heat exchanger; 9. Heat extraction pipeline; 10. Isolation wall; 11. Heat extraction furnace; 12. Heat extraction roller; 13. Diverter plate; 14. Diverter hole; 15. Recovery pipeline; 16. Gas collecting hood; 17. Monitoring pipeline; 18. CO concentration meter; 19. Monitoring fan; 20. Limit wall; 21. Limit hole; 22. Upper cover; 23. Lower cover; 24. Inspection port; 25. Ladle cover; 26. Ladle body; 27. Calcium carbide plate inlet; 28. Calcium carbide plate outlet; 29. ​​Recovery fan; 30. Pressure gauge. DETAILED DESCRIPTION

[0027] The following is further described in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0028] like Figure 1 and Figure 2 As shown, a calcium carbide sensible heat utilization system based on continuous discharging includes a calcium carbide furnace 1, and also includes a tundish 2, a heat extraction device 3 and a plate crushing device 4. The furnace eye of the calcium carbide furnace 1 is connected to a chute 5, and the chute 5 is connected to the tundish 2 via a pipeline, and the tundish 2 is connected to the heat extraction device 3 via a diversion trough 6; the furnace gas self-heat exchange pipeline 7 of the calcium carbide furnace 1 enters the heat exchanger 8, and the furnace gas self-heat extraction pipeline 9 after heat exchange in the heat exchanger 8 enters the heat extraction device 3.

[0029] A partition wall 10 is provided between the heat exchanger 8 and the heat extraction device 3. In order to improve the heat exchange efficiency and control the cost, the heat exchanger 8 adopts a water-cooled heat exchange system, but calcium carbide and water react violently, so the partition wall 10 is provided to prevent the water in the heat exchanger 8 from contacting the calcium carbide when the heat exchanger 8 leaks unexpectedly.

[0030] The upper and lower furnace walls of the heat extraction furnace 11 in the heat extraction device 3 are wavy structures, and the furnace gas after heat exchange moves along the upper and lower furnace walls, and its movement direction is opposite to the movement direction of the calcium carbide plate. The wavy structural design can extend the furnace gas forward path, strengthen the convection heat exchange of the heat extraction medium, quickly complete the double-sided cooling of the calcium carbide plate, and improve the heat absorption efficiency of the furnace gas.

[0031] like Figure 1 and Figure 2 As shown, the heat extraction device 3 includes a heat extraction furnace 11, in which a heat extraction roller 12 is arranged, the inlet end of the heat extraction furnace 11 is connected to the tundish 2 through a diverter trough 6, the diverter trough 6 is a trough structure, a vertical diverter plate 13 is arranged in the middle of the diverter trough 6, and diverter holes 14 are arranged at intervals on the diverter plate 13, so that the molten calcium carbide flowing out of the tundish 2 is divided into multiple belt-type molten calcium carbide flows; the inlet end of the heat extraction roller 12 is connected to the diverter trough 6, and the outlet end is connected to The plate breaking device 4, the multi-channel belt molten calcium carbide flow gradually cools and moves to the position of the plate breaking device 4 on the heat extraction roller 12; the furnace gas after heat exchange in the heat exchanger 8 enters the upper and lower furnace walls of the air inlet end of the heat extraction furnace 11 from the heat extraction pipe 9, and is discharged from the exhaust end of the heat extraction furnace 11 and enters the recovery pipe 15; an air collecting hood 16 is set on the outside of the heat extraction furnace 11, and a monitoring pipe 17 is arranged outside the air collecting hood 16, and a CO concentration meter 18 is arranged on the monitoring pipe 17.

[0032] The heat extraction device 3 is the key part of waste heat recovery in the whole system. The heat emitted in the process of molten calcium carbide becoming solid in the diversion trough 6 and the heat emitted by the calcium carbide plate in the cooling process of the heat extraction roller 12 are all collected in the heat extraction furnace 11, and then the furnace gas introduced is gradually preheated to achieve the purpose of waste heat recovery.

[0033] In order to prevent the leakage of furnace gas in the heat extraction furnace 11, a gas collecting hood 16 is also installed on the outside of the heat extraction furnace 11. When the CO concentration meter 18 in the gas collecting hood 16 exceeds the threshold value, the monitoring fan 19 on the monitoring pipeline 17 is started to suck the gas into the limestone calcining workshop for combustion. The setting of this device can effectively avoid the possible harm to safe production caused by furnace gas leakage.

[0034] The diverter plate 13 in the diverter 6 is provided with a plurality of diverter holes 14, and the diverter 6 is coated with heat-insulating cotton on the outside. The diverter 6 is realized by the diverter holes 14 evenly and spaced on the diverter plate 13. After the molten carbide flow passes through the diverter holes 14, it is cut into a plurality of belt-type molten carbide flows with the same number of diverter holes 14. The molten carbide thickness is reduced in the diverter 6, which is also the basis for improving the cooling efficiency of the carbide.

[0035] A limiting wall 20 is provided between the plate-breaking device 4 and the heat extraction roller 12, and a limiting hole 21 is provided on the limiting wall 20, and the cooled calcium carbide plate is broken by the plate-breaking device 4. The height of the limiting hole on the limiting wall 20 is greater than the thickness of the calcium carbide plate and less than 1.5 times the thickness of the calcium carbide plate, and the plate-breaking device 4 is a plate-breaking knife that falls periodically. Since the calcium carbide plate is relatively thin, in order to prevent the plate-breaking device 4 from tilting the calcium carbide plate at other parts of the heat extraction roller 12 during the breaking process, the limiting wall 20 is provided, and the limiting hole 21 in the limiting wall 20 has a certain height, which can not only ensure that the calcium carbide plate can pass smoothly, but also play a role of limiting and cutting, and prevent the plate-breaking device 4 from tilting the calcium carbide plate at other parts.

[0036] The starting section of the chute 5 is an open trough structure, which receives the molten calcium carbide at the furnace eye of the calcium carbide furnace 1, and the remaining section is a closed structure, which transports the molten calcium carbide to the tundish 2. The outside of the chute 5 is covered with thermal insulation cotton, and the starting section of the chute 5 accounts for 1 / 3 of the total length. After the furnace eye of the calcium carbide furnace discharges each batch of calcium carbide, the molten calcium carbide at the furnace eye position gradually cools down and blocks the furnace eye. At this time, it is necessary to use a plugging rod to clear the furnace eye. Therefore, the starting section of the chute 5 is designed as an open trough structure to facilitate the action of plugging the rod, and the remaining section adopts a closed structure, which can better keep warm and reduce heat loss.

[0037] like Figure 3 and Figure 4As shown, the gas collecting hood 16 includes an upper hood 22 and a lower hood 23. The upper hood 22 is a closed structure, and a monitoring pipe 17 is connected to the upper hood 22; the lower hood 23 is connected below the upper hood 22, and is composed of multiple support columns, and an inlet and outlet are reserved at the inlet and outlet position of the calcium carbide plate, and an inspection port 24 is also provided on the lower hood 23. The lower hood 23 of the gas collecting hood 16 is provided with an inlet 27 and an outlet 28 for the calcium carbide plate to facilitate the inlet and outlet of the calcium carbide plate, and an inspection port 24 is provided for manual entry and maintenance.

[0038] like Figure 5 and Figure 6 As shown, the bottom of the tundish 2 is an inclined structure, with the side facing the calcium carbide furnace 1 being higher and the side facing the heat extraction device 3 being lower, and the molten calcium carbide entering from the chute 5 is kept in a molten state in the tundish 2. The inclined structure design of the tundish 2 can facilitate the molten calcium carbide to flow out and avoid being retained at the bottom of the tundish 2.

[0039] The tundish 2 is made of high-temperature alloy steel resistant to 1800°C. The tundish 2 includes a cover 25 and a body 26. The cover 25 and the body 26 are connected in a concave-convex zigzag manner, and a hook is provided on the cover 25. Considering the similar compatibility of materials, inorganic materials that can withstand higher temperatures are not used, because calcium carbide is an inorganic material. If the material of the tundish 2 is also an inorganic material, the calcium carbide will be melted into one with the material of the tundish 2 after cooling, and it is not easy to separate. As a buffering device, the tundish 2 requires regular maintenance, and it is necessary to consider that the cooled calcium carbide and the tundish 2 should be easily separated. The cover 25 and the body 26 are connected in a concave-convex zigzag manner, which effectively reduces the convection between the tundish 2 and the external gas while ensuring the rise and fall of the cover 25, and at the same time shields the external radiation heat dissipation of the high-temperature medium in the tundish 2.

[0040] In the entire system, the travel path of the molten calcium carbide is: it is discharged from the furnace eye of the calcium carbide furnace 1 and enters the tundish 2 through the closed and insulated chute 5. The tundish 2 gathers a large amount of molten calcium carbide. The molten calcium carbide flowing out of the tundish 2 enters the diverter trough 6. In the diverter trough 6, the molten calcium carbide flow is divided into multiple belt-type molten calcium carbide flows, and in the process of moving in the diverter trough 6, the molten calcium carbide flow gradually hardens and becomes the root of multiple calcium carbide plates, and then is driven to move by the heat extraction roller 12 and gradually cools and hardens during the movement to become a calcium carbide plate, until it is broken into pieces of suitable size at the plate breaking device 4.

[0041] In the entire system, the path of the furnace gas from the calcium carbide furnace 1 is: it enters the heat exchanger 8 through the heat exchange pipe 7 of the calcium carbide furnace 1 to carry out the first waste heat utilization, and the furnace gas temperature after the heat exchange is reduced and enters the heat extraction furnace 11 through the heat extraction pipe 9 in two ways, and moves in reverse along the upper and lower furnace walls of the heat extraction furnace 11 to complete the double-sided cooling of the calcium carbide plate, and the preheated furnace gas from the calcium carbide furnace 1 is recycled from the recovery pipe 15.

[0042] During use, before the calcium carbide plate heat extraction system is activated, the gap between the heat extraction roller 12 and the furnace wall of the heat extraction furnace 11 needs to be filled with insulation cotton; since the heat extraction roller 12 needs to be driven by a motor, the motor needs to be set outside the space of the heat extraction furnace 11, so there will be a certain gap at the furnace wall where the pipeline is located, and the gap also needs to be filled with insulation cotton to prevent the furnace gas from leaking out or the outside air from entering. When in use, the recovery fan 29 set on the recovery pipeline 15 can be started, and the pressure gauge 30 set in the heat extraction furnace 11 can be observed. When the internal pressure of the heat extraction furnace 11 presents a slight positive pressure, it enters normal operation. At this time, the internal pressure of the heat extraction furnace 11 presents a slight positive pressure, and a small amount of furnace gas flowing out through the gap will enter the gas collection hood 16, and under the action of the monitoring fan 19 set on the monitoring pipeline 17, it will be pumped to the limestone calcining workshop.

[0043] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A calcium carbide sensible heat utilization system based on continuous discharging, comprising a calcium carbide furnace, characterized in that: It also includes a tundish, a heat extraction device and a plate crushing device. The furnace eye of the calcium carbide furnace is connected to a chute, the chute is connected to the tundish via a pipeline, and the tundish is connected to the heat extraction device via a diverter trough. The furnace gas of the calcium carbide furnace enters the heat exchanger from the heat exchange pipeline, and the furnace gas after heat exchange in the heat exchanger enters the heat extraction device from the heat extraction pipeline. The bottom of the tundish is an inclined structure, with the side facing the calcium carbide furnace being higher and the side facing the heat extraction device being lower, so that the molten calcium carbide entering from the chute remains in a molten state in the tundish; The heat extraction device comprises a heat extraction furnace, in which a heat extraction roller is arranged, the inlet end of the heat extraction furnace is connected to the tundish through a diverter groove, the diverter groove is a trough structure, a vertical diverter plate is arranged in the middle of the diverter groove, and diverter holes are arranged at intervals on the diverter plate, so that the molten calcium carbide flowing out of the tundish is divided into multiple belt-type molten calcium carbide flows; the inlet end of the heat extraction roller is connected to the diverter groove, and the outlet end is connected to the crushing plate device, and the multiple belt-type molten calcium carbide flows are gradually cooled and moved to the position of the crushing plate device on the heat extraction roller; the furnace gas after heat exchange by the heat exchanger enters the upper and lower furnace walls of the air inlet end of the heat extraction furnace from the heat extraction pipeline, and is discharged from the exhaust end of the heat extraction furnace and enters the recovery pipeline; an air collecting hood is set on the outside of the heat extraction furnace, a monitoring pipeline is arranged on the outside of the air collecting hood, and a CO concentration meter is arranged on the monitoring pipeline; A limit wall is arranged between the plate crushing device and the heat extraction roller, and a limit hole is arranged on the limit wall, and the cooled calcium carbide plate is crushed by the plate crushing device; A separation wall is arranged between the heat exchanger and the heat extraction device.

2. A calcium carbide sensible heat utilization system based on continuous discharging according to claim 1, characterized in that: The starting section of the chute is an open trough structure, which receives the molten calcium carbide at the eye of the calcium carbide furnace. The remaining section is a closed structure, which transports the molten calcium carbide to the tundish. The outside of the chute is covered with thermal insulation cotton, and the starting section of the chute accounts for 1 / 3 of the total length.

3. The calcium carbide sensible heat utilization system based on continuous discharging according to claim 1 is characterized in that: The tundish is made of high-temperature alloy steel resistant to 1800° C. The tundish comprises a cover and a body. The cover and the body are connected in a concave-convex zigzag manner, and a hook is arranged on the cover.

4. The calcium carbide sensible heat utilization system based on continuous discharging according to claim 1 is characterized in that: The upper and lower furnace walls of the heat extraction furnace in the heat extraction device are of a wavy structure, and the furnace gas after heat exchange moves along the upper and lower furnace walls, and its movement direction is opposite to that of the calcium carbide plate.

5. The calcium carbide sensible heat utilization system based on continuous discharging according to claim 1 is characterized in that: A plurality of diversion holes are arranged on the diversion plate in the diversion trough.

6. The calcium carbide sensible heat utilization system based on continuous discharging according to claim 1 is characterized in that: The plate breaking device is a plate breaking knife which falls periodically.

7. The calcium carbide sensible heat utilization system based on continuous discharging according to claim 1 is characterized in that: The height of the limiting hole on the limiting wall is greater than the thickness of the calcium carbide plate and less than 1.5 times the thickness of the calcium carbide plate.

8. The calcium carbide sensible heat utilization system based on continuous discharging according to claim 1 is characterized in that: The gas collecting hood includes an upper hood and a lower hood. The upper hood is a closed structure, and a monitoring pipeline is connected to the upper hood. The lower hood is connected below the upper hood, and an inlet and outlet are reserved at the inlet and outlet position of the calcium carbide plate. An inspection port is also provided on the lower hood.

9. The calcium carbide sensible heat utilization system based on continuous discharging according to claim 1 is characterized in that: The outside of the diversion trough is coated with thermal insulation cotton.

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