Molten Calcium Carbide Heat Recovery System

Abstract

The present invention provides a molten calcium carbide heat recovery system, which includes a heat-insulating housing and a first cooling device, a crushing device, and a second cooling device that are sequentially arranged in the heat-insulating housing. The heat-insulating housing is provided with a feed inlet, a discharge outlet, and an air outlet. The air outlet is connected to a heat-using device. The first cooling device is located below the feed inlet. The discharge outlet is located downstream of the second cooling device along the conveying direction of calcium carbide. Calcium carbide is sequentially conveyed along the feed inlet, the first cooling device, the crushing device, and the second cooling device, and is discharged from the heat-insulating housing through the discharge outlet. The molten calcium carbide heat recovery system provided by the present invention aims to solve the problem that in the prior art, the cooling time of molten calcium carbide after preparing calcium carbide by the electric furnace smelting method is relatively long, and the heat dissipated during the cooling of calcium carbide is wasted.

Description

Technical Field

[0001] The present invention belongs to the technical field of waste heat recovery, and more specifically, relates to a molten calcium carbide heat recovery system. Background Art

[0002] The main component of calcium carbide is calcium carbide. Calcium carbide is an inorganic compound, a white crystal. The industrial product is a grayish-black massive substance, and the cross-section is purple or gray. It reacts violently with water immediately, generating acetylene and releasing heat. Calcium carbide is an important basic chemical raw material, mainly used to produce acetylene gas. It is also used in organic synthesis, oxyacetylene welding, etc.

[0003] The preparation methods of calcium carbide generally include electric furnace smelting method and oxygen thermal method. The oxygen thermal method is to make part of the pulverized coal burn (raising the furnace temperature) in an oxygen-containing environment (blowing oxygen or oxygen-enriched air in the furnace) to generate synthesis gas, and the heat generated makes the remaining pulverized coal and powdered calcium oxide react to produce calcium carbide. This method uses oxygen-enriched smelting of coke and limestone in a non-calcium carbide furnace, extracts carbon from limestone, produces calcium carbide and by-products of gas and ferrosilicon. This new technology of "one furnace with three uses" enables the comprehensive utilization of waste heat and coal ash in the coal gasification process in the production of CaC2. After the coal ash is melted with the batching, CaC2 and ferrosilicon are formed (when purifying CaC2), and at the same time, gas is naturally generated under high temperature and low pressure. For every 1t of calcium carbide produced (80% CaC2), about 168kg of pure carbon is extracted from limestone, and 6000m 3 (CO content is 55%) - 2600m 3 (CO content is 95%), and about 4.5t of methanol can be produced. Oxygen serves two purposes at once: oxygen enrichment not only raises the furnace temperature but also improves the CO quality of the gas; the gas generated after the thermal energy of the coal is utilized is used for coal chemical industry or clean power generation.

[0004] However, the strength of lime in calcium carbide smelting is relatively low, and it will be pulverized under greater pressure, which will seriously affect the gas permeability of the burden column, and then affect the movement, heat transfer and mass transfer of gas during the smelting process, and may cause the interruption of the continuity of the smelting process. In addition, the current cooling method of the furnace body in blast furnace smelting is water cooling of the cooling stave, but water leakage often occurs during the production process, especially in the later stage of the furnace campaign. Considering the special properties of calcium carbide, once water leakage occurs, it may cause major safety accidents. Due to the limitations of the above factors, the oxygen thermal method for preparing calcium carbide has not been widely promoted, and the electric furnace smelting method is still mostly used in industry to prepare calcium carbide.

[0005] The electric furnace smelting method is to crush and screen the burned lime, and then send it to the lime silo for storage until it is used. Lime and coke that meet the requirements of calcium carbide production are proportioned according to the specified ratio, and the furnace charge is sent to the top bin of the electric furnace by a bucket elevator. The furnace charge is added into the electric furnace through a feed pipe. The furnace charge generates calcium carbide through the resistance heat reaction of the electrode arc and the furnace charge in the electric furnace. The molten calcium carbide is pulled to the corridor or packaging room by a top car in the calcium carbide pot for cooling. After the calcium carbide ingot solidifies, the calcium carbide ingot is lifted out by a bridge crane and a single gripper, placed on the cast iron floor for cooling. After cooling to an appropriate degree, the calcium carbide is crushed to the qualified particle size, and then classified and packaged and sent to the finished product warehouse.

[0006] Since the existing calcium carbide cooling method uses natural cooling for treatment, it not only takes a long time, prolonging the entire production period of calcium carbide, but also the heat generated during calcium carbide cooling is directly discharged, resulting in energy waste. In addition, the existing cooling method requires the molten calcium carbide to be laid flat in sequence, which requires a large space area and increases the area of the workshop. Summary of the Invention

[0007] The purpose of the present invention is to provide a molten calcium carbide heat recovery system, aiming to solve the problems in the prior art that the cooling time of molten calcium carbide after preparing calcium carbide by the electric furnace smelting method is relatively long and the heat dissipated during calcium carbide cooling is wasted.

[0008] To achieve the above object, the technical solution adopted by the present invention is: to provide a molten calcium carbide heat recovery system, including a heat preservation housing and a first cooling device, a crushing device, and a second cooling device sequentially arranged in the heat preservation housing. The heat preservation housing is provided with a feed inlet, a discharge outlet, and an air outlet. The air outlet is connected to a heat-using device. The first cooling device is located below the feed inlet. The discharge outlet is located downstream of the second cooling device along the conveying direction of calcium carbide. Calcium carbide is sequentially conveyed along the feed inlet, the first cooling device, the crushing device, and the second cooling device, and is discharged from the heat preservation housing through the discharge outlet.

[0009] In a possible implementation manner, the first cooling device includes:

[0010] Machine tool;

[0011] A plurality of transmission wheels are sequentially rotatably connected to the machine tool along the conveying direction. The axis of the transmission wheel is perpendicular to the conveying direction, and the plurality of transmission wheels are gradually arranged downward along the conveying direction;

[0012] A conveyor belt is wound around the plurality of transmission wheels, and ventilation holes are provided on the conveyor belt;

[0013] A first driving component is connected to the transmission wheel and is used to drive the transmission wheel to rotate around its own axis; and

[0014] A first cooling assembly is provided below the conveyor belt, and the first cooling assembly is used to blow air onto the conveyor belt.

[0015] In a possible implementation, a material blocking mechanism is further provided on the conveyor belt. The material blocking mechanism includes a plurality of material blocking plates arranged at intervals in sequence along the conveying direction, and a feeding space is formed between two adjacent material blocking plates.

[0016] In a possible implementation, the crushing device is arranged above the second cooling device, and the crushing device includes:

[0017] A crushing housing, with an inlet opened at the top and an outlet opened at the bottom of the crushing housing;

[0018] A cutting knife is arranged inside the crushing housing, and the axis of the cutting knife is parallel to the up-down direction; and

[0019] A second driving assembly is arranged outside the crushing housing and is connected to the cutting knife. The second driving assembly is used to control the cutting knife to rotate around its own axis.

[0020] In a possible implementation, the cutting knife is a conical knife body with a diameter gradually increasing from top to bottom, and an arc-shaped cutting blade is arranged on the outer peripheral surface of the cutting knife.

[0021] In a possible implementation, a separation device is further provided at the feed inlet, and the separation device includes:

[0022] A fixing frame is arranged at the feed inlet;

[0023] A feed plate is arranged on the fixing frame, and a feed hole is opened on the feed plate;

[0024] A separation plate is slidably connected to the fixing frame along a first path, the first path forms an angle with the feeding direction, and the separation plate is located below the feed plate; and

[0025] A third driving assembly is arranged on the fixing frame and is connected to the separation plate. The third driving assembly is used to control the separation plate to slide along the first path.

[0026] In a possible implementation, a separation hole corresponding to the feed hole is opened on the separation plate. The third driver controls the separation plate to move along the first path, so that the separation hole has a feeding state corresponding to the feed hole up and down, and a separation state misaligned with the feed hole along the first path.

[0027] In a possible implementation, the third driving assembly includes:

[0028] A third driver is arranged on the fixing frame;

[0029] An eccentric drive wheel, connected to the drive end of the third driver; and

[0030] A connecting member, connected to the eccentric drive wheel, the eccentric drive wheel being eccentrically connected to the drive end or the connecting member, and the connecting member is also rotatably connected to the separation plate.

[0031] In a possible implementation manner, the third driving assembly is a pneumatic telescopic device or a hydraulic telescopic device, and the separation plate is connected to the telescopic end of the third driving assembly.

[0032] In a possible implementation manner, the fixing frame includes:

[0033] A frame body, the frame body is provided with a through material guiding groove in the up and down direction, and the frame body is further provided with a sliding groove along the first path, the sliding groove is communicated with the material guiding groove, the feeding plate is embedded in the material guiding groove, the separation plate is slidably arranged in the sliding groove along the first path, and the frame body is connected to the heat preservation shell; and

[0034] A fixing plate, connected to the frame body along the first path, and the fixing plate is used for fixing the third driving assembly.

[0035] The beneficial effects of the molten calcium carbide heat recovery system provided by the present invention are as follows: Compared with the prior art, in the molten calcium carbide heat recovery system of the present invention, molten calcium carbide enters the heat preservation shell from the feeding port and falls into the first cooling device under the action of gravity. The first cooling device preliminarily cools the molten calcium carbide, so that the molten calcium carbide cools down and solidifies to form solid blocky calcium carbide. The solidified calcium carbide enters the crushing device for cutting and crushing, and the large calcium carbide is crushed into smaller sized calcium carbide blocks. The crushed calcium carbide blocks enter the second cooling device for further cooling and temperature reduction, and then are discharged from the heat preservation shell through the discharge port. In the present invention, the calcium carbide is first cooled and solidified into a solid by the first cooling device, and then crushed. During the crushing process, the large calcium carbide breaks, and the heat inside it quickly dissipates outward, improving the cooling and heat dissipation speed. In addition, the calcium carbide with a higher temperature has a relatively lower hardness and is easier to crush, and the crushing is carried out in the heat preservation shell, reducing the leakage of dust and protecting the cleanliness of the working environment. The crushed calcium carbide enters the second cooling device for further cooling and temperature reduction, so that the heat dissipated during the cooling process of the calcium carbide is concentrated in the heat preservation shell and is discharged into the heat using equipment through the air outlet, realizing the utilization of heat and reducing the energy loss. Description of the Drawings

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0037] Figure 1 A schematic structural diagram of a molten carbide heat recovery system provided in Example 1 of the present invention;

[0038] Figure 2 This is a schematic structural diagram of a heat-using device used in Example 1 of the present invention;

[0039] Figure 3 A partial schematic diagram of a first cooling device used in a second embodiment of the present invention;

[0040] Figure 4 This is a cross-sectional view of a pulverizing device used in Example 3 of the present invention;

[0041] Figure 5 A top view of the pulverizing device used in the third embodiment of the present invention;

[0042] Figure 6 This is a structural diagram of the separation device used in Example 4 of the present invention;

[0043] Figure 7 A cross-sectional view of a separation device used in a fourth embodiment of the present invention;

[0044] Figure 8 This is a cross-sectional view of the separation device used in Example 5 of the present invention.

[0045] Figure: 1, insulation shell; 101, air outlet; 102, discharge port; 103, feed port; 2, first cooling device; 201, machine tool; 202, baffle plate; 2021, feeding space; 203, first cooling assembly; 204, transmission wheel; 205, conveyor belt; 2051, air vent; 206, discharge plate; 3, crushing device; 301, crushing shell; 3011, inlet; 3012, outlet; 302, cutting blade; 304, second drive; 305, first transmission Drive gear; 306, second transmission gear; 307, cutting blade; 4, second cooling device; 5, separation device; 501, frame; 5011, slide; 5012, material guide chute; 502, feed plate; 5021, feed hole; 503, separation plate; 504, connecting piece; 505, third drive; 506, eccentric drive wheel; 507, fixed plate; 6, heat-using equipment; 601, boiler; 602, evaporator; 603, turbine; 604, preheater; 605, condenser. DETAILED DESCRIPTION

[0046] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clear and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0047] In the claims, the description and the above-mentioned drawings of the present invention, unless otherwise clearly defined, when using terms such as "first", "second" or "third", etc., are for distinguishing different objects and not for describing a specific order. Unless otherwise stated, the remaining orientation terms, such as "vertical", "clockwise", "counterclockwise", etc., indicate the orientation and position relationship based on the orientation and position relationship shown in the drawings, and are only for facilitating the description of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as limiting the specific protection scope of the present invention. In the claims, the description and the above-mentioned drawings of the present invention, unless otherwise clearly defined, when using terms such as "fixed connection" or "fixedly connected", should be understood in a broad sense, that is, any connection method without displacement relationship and relative rotation relationship between the two, that is, including non-detachable fixed connection, detachable fixed connection, being integrated and fixed connection through other devices or elements. In the claims, the description and the above-mentioned drawings of the present invention, when using terms such as "comprising", "having" and their variants, are intended to mean "including but not limited to".

[0048] Please refer to Figure 1 and Figure 2 simultaneously. Now, the molten calcium carbide heat recovery system provided by the present invention will be described. The molten calcium carbide heat recovery system includes a heat preservation housing 1, and a first cooling device 2, a crushing device 3 and a second cooling device 4 arranged in the heat preservation housing 1 in sequence. A feed inlet 103, a discharge outlet 102 and an air outlet 101 are formed on the heat preservation housing 1. The air outlet 101 is connected to a heat-using device 6. The first cooling device 2 is located below the feed inlet 103. The discharge outlet 102 is located downstream of the second cooling device 4 along the conveying direction of calcium carbide. Calcium carbide is conveyed in sequence through the feed inlet 103, the first cooling device 2, the crushing device 3 and the second cooling device 4, and is discharged from the heat preservation housing 1 through the discharge outlet 102.

[0049] The molten calcium carbide heat recovery system provided by the present invention is compared with the prior art. In the molten calcium carbide heat recovery system of the present invention, molten calcium carbide enters the insulation shell 1 through the feed port 103 and falls into the first cooling device 2 under the action of gravity. The first cooling device 2 preliminarily cools the molten calcium carbide, causing it to solidify into solid block calcium carbide after cooling. The solidified calcium carbide enters the crushing device 3 for cutting and crushing, crushing the large pieces of calcium carbide into smaller pieces. The crushed calcium carbide pieces enter the second cooling device 4 for further cooling and are then discharged from the insulation shell 1 through the discharge port 102. In the present invention, the calcium carbide is first cooled and solidified into a solid by the first cooling device 2 and then crushed. During the crushing process, the large pieces of calcium carbide break up, and the heat inside them is quickly dissipated outward, thereby improving the cooling and heat dissipation speed. In addition, the higher temperature calcium carbide has a relatively lower hardness and is easier to crush. Moreover, crushing in the insulation shell 1 reduces dust leakage and protects the cleanliness of the working environment. The crushed calcium carbide enters the second cooling device 4 for further cooling, so that the heat emitted during the cooling process of the calcium carbide is concentrated in the heat-insulating shell 1 and discharged into the heat-using equipment 6 through the air outlet 101, thereby realizing the utilization of heat and reducing energy loss.

[0050] As a specific implementation of gas equipment, please refer to Figure 2 The gas-using equipment includes a boiler 601, an evaporator 602 and a turbine 603 connected in sequence, a preheater 604 connected to the evaporator 602 and the boiler 601 respectively, and a condenser 605 connected to the turbine 603 and the preheater 604 respectively.

[0051] Hot air from the insulated housing 1 enters the boiler 601 through the outlet 101. It then passes through the evaporator 602 and turbine 603, where the heat is converted into mechanical energy, which can then be used to perform external work. Condensate from the evaporator 602 flows into the preheater 604 for preheating before entering the boiler 601. Gas generated by the turbine 603 enters the condenser 605 for condensation and is then discharged into the circulating water system. If the pressure in the evaporator 602 becomes excessive, some of the steam enters the turbine 603 to perform work, while the remaining steam enters the condenser 605 for condensation, ensuring the safety of the entire circuit.

[0052] In some embodiments, see Figure 1 and Figure 3The first cooling device 2 includes a machine tool 201, a conveyor belt 205, a first driving assembly, a first cooling assembly 203 and multiple transmission wheels 204; the multiple transmission wheels 204 are connected to the machine tool 201 and rotate in sequence along the conveying direction, the axis of the transmission wheel 204 is perpendicular to the conveying direction, and the multiple transmission wheels 204 are gradually arranged downward along the conveying direction; the conveyor belt 205 is wound around the multiple transmission wheels 204, and the conveyor belt 205 is provided with air holes 2051; the first driving assembly is connected to the transmission wheel 204, and is used to drive the transmission wheel 204 to rotate around its own axis; the first cooling assembly 203 is arranged below the conveyor belt 205, and the first cooling assembly 203 is used to blow air to the conveyor belt 205.

[0053] In this embodiment, the first drive assembly drives the transmission wheel 204 to rotate, and the conveyor belt 205 moves along the conveying direction under the action of friction, thereby causing the molten calcium carbide that has fallen onto the conveyor belt to move along the conveying direction. During this movement, the calcium carbide dissipates heat outward. At the same time, the first cooling assembly 203 blows air toward the conveyor belt 205. The cold air passes through the air vents 2051 and contacts the calcium carbide, removing heat from the surface of the calcium carbide and accelerating its cooling.

[0054] Optionally, the first cooling assembly 203 includes a plurality of cooling fans sequentially arranged along the conveying direction.

[0055] Optionally, the first drive assembly includes at least one motor that controls the rotation of the transmission wheel 204. When multiple motors are provided, the motors are arranged in a one-to-one correspondence with the transmission wheels 204, and each motor drives a corresponding transmission wheel 204 to rotate, and each transmission wheel 204 has the same rotation speed.

[0056] Optionally, a discharge plate 206 is provided downstream of the conveyor belt 205, which is tilted up and down along the conveying direction, and the upper end of the discharge plate abuts against the conveyor belt 205. The discharge plate 206 is used to guide the calcium carbide on the conveyor belt 205 into the crushing device 3 to prevent the calcium carbide from splashing outward.

[0057] In some embodiments, see Figure 1 The conveyor belt 205 is also provided with a material blocking mechanism, which includes a plurality of material blocking plates 202 arranged in sequence and spaced apart along the conveying direction, and a feeding space 2021 is formed between two adjacent material blocking plates 202.

[0058] After the molten calcium carbide enters the heat-insulating housing 1, it falls onto the conveyor belt 205 under the action of gravity. Since the conveyor belt 205 continues to move along the conveying direction, the molten calcium carbide enters different feeding spaces 2021 respectively, and forms independent calcium carbide blocks after solidification. The solution in this embodiment realizes the separation of solid calcium carbide, which facilitates further crushing and processing of the calcium carbide.

[0059] In some embodiments, see Figure 1 andFigure 4 The crushing device 3 is arranged above the second cooling device 4. The crushing device 3 includes a crushing shell 301, a cutting knife 302 and a second driving assembly. The top of the crushing shell 301 is provided with an inlet 3011, and the bottom is provided with an outlet 3012; the cutting knife 302 is arranged in the crushing shell 301, and the axis of the cutting knife 302 is parallel to the up and down direction; the second driving assembly is arranged outside the crushing shell 301 and is connected to the cutting knife 302. The second driving assembly is used to control the cutting knife 302 to rotate around its own axis.

[0060] Calcium carbide enters the pulverizing shell 301 through the inlet 3011 and is separated and cut into small pieces by the rotating cutter 302 inside the pulverizing shell 301. The cutter 302 crushes the calcium carbide under the action of the rotational force. In addition, when the calcium carbide is located between the pulverizing shell 301 and the cutter 302, it is also crushed by the squeezing force between the cutter 302 and the pulverizing shell 301, thereby improving the pulverization efficiency.

[0061] Optionally, the second drive assembly includes a second driver 304 and a first transmission gear 305 connected to the second driver 304, and a second transmission gear 306 coaxially connected to the cutting knife 302, the first transmission gear 305 is engaged with the second transmission gear 306, and the axis of the first transmission gear 305 is perpendicular to the axis of the second transmission gear 306.

[0062] In some embodiments, see Figures 4 to 5 The cutting knife 302 is a conical knife body with a diameter gradually increasing from top to bottom, and an arc-shaped cutting blade 307 is provided on the outer peripheral surface of the cutting knife 302.

[0063] The second drive assembly controls the rotation of the cutting blade 302. Calcium carbide first contacts with the cutting blade 302 tops. Since the upper diameter of the cutting blade 302 is smaller and the spacing between the pulverizing shell 301 inwalls is larger, calcium carbide can be separated into larger blocks. Then as the calcium carbide moves downward, the distance of the cutting blade 302 gradually increases, and the spacing between the cutting blade 302 and the pulverizing shell 301 gradually decreases, and calcium carbide can be further cut into smaller blocks of volume. The scheme in the present embodiment can progressively separate the calcium carbide cutting, avoids the excessive pulverizing force causing the cutting blade 302 to collapse or the pulverizing shell 301 to be damaged. In addition, an arcuate cutting blade 307 is provided to increase the pulverizing force to the calcium carbide.

[0064] Specifically, the arc-shaped cutting blade 307 is bent with the axis of the cutting blade 302 as a reference.

[0065] In some embodiments, see Figure 1 and Figure 6The feed port 103 is also provided with a separation device 5, which includes a fixed frame, a feed plate 502, a separation plate 503 and a third drive assembly. The fixed frame is arranged on the feed port 103; the feed plate 502 is arranged on the fixed frame, and a feed hole 5021 is opened on the feed plate 502; the separation plate 503 is connected to the fixed frame by sliding along a first path, and the first path is at an angle to the feeding direction, and the separation plate 503 is located below the feed plate 502; the third drive assembly is arranged on the fixed frame and is connected to the separation plate 503, and the third drive assembly is used to control the separation plate 503 to slide along the first path.

[0066] The molten calcium carbide passes through the feed hole 5021, and the third drive assembly controls the separation plate 503 to slide along the first path to separate and cut the molten calcium carbide, thereby preventing the molten calcium carbide from continuously entering the heat-insulating shell 1 and reducing the volume of the molten calcium carbide. The solution in this embodiment separates the molten calcium carbide, and after the molten calcium carbide enters the heat-insulating shell 1, it forms a braking volume, and then cools down under the action of the first cooling device 2 to form a block solid. By first separating the molten calcium carbide, the volume of the calcium carbide after solidification is controlled, and then further crushing and cutting by the crushing device 3 is facilitated to cut and separate the calcium carbide.

[0067] In some embodiments, see Figures 6 to 8 A separation hole corresponding to the feed hole 5021 is opened on the separation plate 503, and the third driver 505 controls the separation plate 503 to move along the first path so that the separation hole has a feeding state corresponding to the feed hole 5021 above and below, and a separation state that is staggered with the feed hole 5021 along the first path.

[0068] When the third drive assembly controls the separation hole and the feed hole 5021 to align vertically, the molten calcium carbide sequentially passes through the separation hole and the feed hole 5021 and enters the thermal insulation shell 1. When the third drive assembly controls the separation hole and the feed port to be misaligned, the molten calcium carbide is separated and cut, preventing it from entering the thermal insulation shell 1. In this embodiment, the feed hole 5021 is switched between the feeding state and the separation state by controlling the separation plate 503, which reduces the travel distance of the separation plate 503 and saves energy consumption of the third drive assembly.

[0069] In some embodiments, see Figures 6 to 7 The third drive assembly includes a third driver 505, an eccentric drive wheel 506 and a connecting member 504. The third driver 505 is arranged on a fixed frame; the eccentric drive wheel 506 is connected to the driving end of the third driver 505; the connecting member 504 is connected to the eccentric drive wheel 506, and the eccentric drive wheel 506 is eccentrically connected to the driving end or the connecting member 504. The connecting member 504 is also rotatably connected to the separation plate 503.

[0070] The third driver 505 controls the rotation of the eccentric drive wheel 506. Since the drive end or the connecting member 504 is eccentrically connected to the eccentric drive wheel 506, the separation plate 503 reciprocates along the first path as the eccentric wheel rotates, so that molten calcium carbide can enter the heat preservation housing 1 quantitatively.

[0071] Specifically, the third driver 505 is a motor.

[0072] In some embodiments, please refer to Figure 8 , the third drive assembly is a pneumatic expander or a hydraulic expander, and the separation plate 503 is connected to the telescopic end of the third drive assembly.

[0073] The third driver 505 expands and contracts along the first path, so that the separation plate 503 moves along the first path. When the separation plate 503 moves to correspond to the feed hole 5021, the molten calcium carbide leaking from the feed hole 5021 is cut off, and then it continues to move away from the feed hole 5021, and the molten calcium carbide continues to enter the heat preservation housing 1. The solution in this embodiment realizes the separation and cutting of molten calcium carbide through the reciprocating movement of the separation plate 503, so that the molten calcium carbide enters the heat preservation housing 1 quantitatively.

[0074] In some embodiments, please refer to Figures 6 to 7 , the fixing frame includes a frame body 501 and a fixing plate 507. The frame body 501 is provided with a through guide groove 5012 in the up and down direction, and the frame body 501 is further provided with a sliding groove 5011 along the first path. The sliding groove 5011 communicates with the guide groove 5012. The feed plate 502 is embedded in the guide groove 5012, and the separation plate 503 is slidably arranged in the sliding groove 5011 along the first path. The frame body 501 is connected to the heat preservation housing 1; the fixing plate 507 is connected to the frame body 501 along the first path, and the fixing plate 507 is used to fix the third drive assembly.

[0075] The separation plate 503 is slidably arranged in the sliding groove 5011. The sliding groove 5011 provides a guiding effect on the separation plate 503 when it moves, so that the movement of the separation plate 503 is more stable. The feed plate 502 is embedded in the guide groove 5012, which avoids the use of an external connecting member 504 while fixing the feed plate 502 and simplifies the connection structure.

[0076] As a specific implementation manner of the second cooling device 4, the second cooling device 4 is a pusher grate cooler.

[0077] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. Molten calcium carbide heat recovery system, characterized in that, It includes a heat-insulating housing, a first cooling device, a crushing device, and a second cooling device that are sequentially arranged inside the heat-insulating housing. The heat-insulating housing is provided with a feed inlet, a discharge outlet, and an air outlet. The air outlet is connected to a heat-using device. The first cooling device is located below the feed inlet. The discharge outlet is downstream of the second cooling device along the conveying direction of calcium carbide. Calcium carbide is conveyed sequentially through the feed inlet, the first cooling device, the crushing device, and the second cooling device, and is discharged from the heat-insulating housing through the discharge outlet. The feed inlet is further provided with a separation device, and the separation device includes: A fixed frame, arranged at the feed inlet; A feed plate, arranged on the fixed frame, and the feed plate is provided with a feed hole; A separation plate, slidably connected to the fixed frame along a first path, the first path forms an angle with the feed direction, and the separation plate is located below the feed plate; and A third driving component, arranged on the fixed frame and connected to the separation plate, and the third driving component is used to control the separation plate to slide along the first path.

2. The molten calcium carbide heat recovery system according to claim 1, characterized in that, The first cooling device includes: A machine tool; A plurality of transmission wheels, sequentially rotatably connected to the machine tool along the conveying direction, the axis of the transmission wheel is perpendicular to the conveying direction, and a plurality of the transmission wheels are gradually arranged downward along the conveying direction; A conveyor belt, wound around the plurality of transmission wheels, and the conveyor belt is provided with ventilation holes; A first driving component, connected to the transmission wheel, and used to drive the transmission wheel to rotate around its own axis; and A first cooling component, arranged below the conveyor belt, and the first cooling component is used to blow air to the conveyor belt.

3. The fused calcium carbide heat recovery system according to claim 2, wherein The conveyor belt is further provided with a material blocking mechanism, and the material blocking mechanism includes a plurality of material blocking plates sequentially arranged at intervals along the conveying direction, and a feeding space is formed between two adjacent material blocking plates.

4. The molten calcium carbide heat recovery system according to claim 1, wherein The crushing device is arranged above the second cooling device, and the crushing device includes: A crushing housing, the top of the crushing housing is provided with an inlet, and the bottom is provided with an outlet; A cutting knife, arranged inside the crushing housing, and the axis of the cutting knife is parallel to the up-down direction; and A second driving component, arranged outside the crushing housing and connected to the cutting knife, and the second driving component is used to control the cutting knife to rotate around its own axis.

5. The molten calcium carbide heat recovery system according to claim 4, characterized in that, The cutting knife is a conical knife body with a diameter gradually increasing from top to bottom, and an arc-shaped cutting piece is arranged on the outer peripheral surface of the cutting knife.

6. The molten calcium carbide heat recovery system according to claim 1, characterized in that The separation plate is provided with a separation hole corresponding to the feed hole. The third driving component controls the separation plate to move along the first path, so that the separation hole has a feeding state corresponding to the feed hole up and down, and a separation state misaligned with the feed hole along the first path.

7. The fused calcium carbide heat recovery system according to claim 1, wherein, The third driving component includes: A third driver, arranged on the fixed frame; An eccentric driving wheel, connected to the driving end of the third driver; and A connecting piece, the eccentric driving wheel is eccentrically connected to the driving end or the connecting piece, and the connecting piece is also rotatably connected to the separation plate.

8. The molten calcium carbide heat recovery system according to claim 1, wherein, The third driving component is a pneumatic telescopic device or a hydraulic telescopic device, and the separation plate is connected to the telescopic end of the third driving component.

9. The molten calcium carbide heat recovery system according to claim 1, characterized in that, The fixed frame includes: The frame body, a through guide groove is provided in the frame body in the up and down direction, and a sliding groove is also provided in the frame body along the first path, the sliding groove is communicated with the guide groove, the feeding plate is embedded in the guide groove, the separation plate is slidably arranged in the sliding groove along the first path, and the frame body is connected with the heat preservation shell; and The fixing plate is connected to the frame body along the first path, and the fixing plate is used for fixing the third driving component.

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