Low-energy-consumption energy-saving calcium carbide furnace

Abstract

The invention relates to the field of calcium carbide furnace waste heat recovery and utilization, and discloses a low-energy-consumption energy-saving calcium carbide furnace which comprises an electrode holder and a furnace body, the furnace body is located at the upper end of the electrode holder, a discharge port of the furnace body extends outwards to be connected with a melt flow guide channel, and a material distribution rotary disc is rotationally arranged in the middle of the interior of an annular cooling seat. A plurality of sets of curved cooling grooves are evenly formed in the periphery of the outer side face of the material distributing rotary disc, calcium carbide is placed in the curved cooling grooves, and a cooling outer pipe is arranged in the annular cooling base and located on the periphery of the outer side of the material distributing rotary disc. Molten calcium carbide in each group of curved cooling grooves makes full contact with a heat absorption material layer along a winding path of the cooling outer pipe in the circular motion process, the effective contact area is increased, the effective contact time is prolonged, absorbed heat is used for heating water in the cooling outer pipe, generated saturated steam overflows upwards from a plurality of groups of steam drainage short pipes, and the heat absorption effect is improved. The technical problem that calcium carbide waste heat is difficult to fully recycle is effectively solved through internal and external cooperation.

Description

Technical Field

[0001] The present invention relates to the field of waste heat recovery and utilization of calcium carbide furnaces, and in particular to a low-energy-consuming and energy-saving calcium carbide furnace. Background Art

[0002] China is the world's largest producer and consumer of calcium carbide, with its output of calcium carbide accounting for more than 90% of the world's total output for a long time. Calcium carbide is an important inorganic compound that is widely used in chemical industry, metallurgy, building materials and other fields. The calcium carbide furnace is a device dedicated to the production of calcium carbide. In the calcium carbide furnace, electric arc and resistance heat are used to cause a chemical reaction between limestone and carbon raw materials at high temperature to produce calcium carbide. The furnace body of the calcium carbide furnace generally adopts a circular or oval structure, and is lined with refractory materials that can withstand more than 2000°C.

[0003] The existing calcium carbide furnace has many technical defects when in use. First, when using high-temperature flue gas to preheat the hopper, dust is easily adsorbed on the outer wall of the hopper to form a thicker ash layer, which interferes with the flow of flue gas on the one hand and reduces the thermal conductivity of the hopper on the other hand; second, after the calcium carbide in the calcium carbide furnace is smelted, it is taken out of the furnace and put into the calcium carbide pot on the rail trolley. The rail trolley is pulled by a winch and transported to the cooling workshop for cooling, and then the calcium carbide pot is lifted to the ground by an overhead crane for natural cooling. The waste heat of the calcium carbide on the calcium carbide pot is difficult to recycle and reuse, and the heat loss is large, causing waste; third, when the high-temperature flue gas enters the pipe of the steam boiler, dust will accumulate on the pipe wall of the steam boiler, affecting thermal conductivity. The complex boiler pipe is time-consuming and labor-intensive, and the work efficiency is low.

[0004] To sum up, considering that the existing facilities cannot meet the work needs, we propose a low-energy and energy-saving calcium carbide furnace. Summary of the Invention

[0005] The main purpose of the present invention is to provide a low-energy consumption and energy-saving calcium carbide furnace, which can effectively solve the problems in the background technology.

[0006] To achieve the above object, the technical solution adopted by the present invention is: A low-energy and energy-saving calcium carbide furnace includes an electrode seat and a furnace body. The furnace body is located at the upper end of the electrode seat. The discharge port of the furnace body extends outward and is connected to a melt guide channel. A discharge valve is installed at the lower end of the melt guide channel. The melt guide channel is connected to the interior of the annular cooling seat.

[0007] As a preferred solution of the low-energy and energy-saving calcium carbide furnace described in the present invention, a material distribution turntable is rotatably arranged in the middle position inside the annular cooling seat, and a plurality of groups of curved cooling grooves are evenly arranged around the outer side surface of the material distribution turntable. The number of the curved cooling grooves is preferably 8-16 groups, and calcium carbide is placed in the curved cooling grooves. A cooling outer tube is arranged inside the annular cooling seat and on the outer side of the material distribution turntable, and a heat-absorbing material layer that interacts with the calcium carbide is provided on the inner side surface of the cooling outer tube.

[0008] As a preferred solution of the low-energy and energy-saving calcium carbide furnace described in the present invention, the upper end of the cooling outer tube passes through the annular cooling seat and is connected to a first water inlet branch pipe, the upper end of the first water inlet branch pipe is connected to a liquid separation joint, and the upper end of the liquid separation joint is connected to a water supply main pipe.

[0009] As a preferred solution of the low-energy and energy-saving calcium carbide furnace described in the present invention, wherein: the outer side surface of the cooling outer tube extends upward and evenly distributes a plurality of groups of steam diversion short tubes, the number of the steam diversion short tubes is preferably 10-20 groups, the upper ends of the plurality of groups of steam diversion short tubes are all connected to the steam collecting pipe, the steam collecting pipe is for the flow of saturated steam, and one side of the steam collecting pipe is horizontally connected to the first steam transport pipe.

[0010] As a preferred solution of the low-energy and energy-saving calcium carbide furnace described in the present invention, the upper middle position of the upper end of the material distribution turntable is vertically connected with an upper hollow positioning shaft, and the upper hollow positioning shaft is fixed by the first bearing seat and the inner wall of the annular cooling seat, and the lower middle position of the lower end of the material distribution turntable is vertically connected with a lower hollow positioning shaft, and the lower end of the lower hollow positioning shaft is connected to the support base through a damping bearing seat, and the middle part of the lower hollow positioning shaft is sleeved with a groove wheel, and the groove wheel limit is set inside the protective shell, and the lower end of the annular cooling seat is connected to the support base by the protective shell.

[0011] As a preferred solution of the low-energy and energy-saving calcium carbide furnace described in the present invention, there are several groups of wheel grooves evenly distributed on the wheel surface of the groove wheel, and the number of the wheel grooves corresponds to the number of curved cooling grooves, preferably 8-16 groups, and each group of the wheel grooves is for the driving column to extend and move, and the driving column is installed in the eccentric position of the crank, and the crank is sleeved on the output shaft of the first servo motor, and the first servo motor is vertically fixed inside the protective shell.

[0012] As an optimal solution of the low-energy and energy-saving calcium carbide furnace described in the present invention, the side of the liquid separation joint is connected with a No. 2 water inlet branch pipe, the lower end of the No. 2 water inlet branch pipe is vertically inserted into the interior of the upper hollow positioning shaft, and the No. 2 water inlet branch pipe and the upper hollow positioning shaft are connected by a sealed bearing. A steam forming chamber is provided at the inner center position of the material distribution turntable, and the upper hollow positioning shaft and the steam forming chamber are connected. A guide platform is provided at the middle position of the steam forming chamber, and several groups of guide grooves are evenly provided on the surface of the guide platform. The middle position of the lower end surface of the guide platform is connected to the bottom of the steam forming chamber by a sealing seat, a steam suction hole is provided at the upper position of the sealing seat, and a steam exhaust hole is provided at the lower position of the lower hollow positioning shaft, the steam suction hole and the steam exhaust hole are connected, and the number of the steam suction hole and the steam exhaust hole is preferably 2-8 groups, and a steam diversion long pipe is connected to the side of the steam collecting pipe away from the first steam transport pipe, and the steam diversion long pipe extends downward and is inserted into the interior of the support base near the steam exhaust hole.

[0013] As a preferred solution of the low-energy and energy-saving calcium carbide furnace described in the present invention, the upper end of the annular cooling seat is equipped with a discharge cylinder through two sets of positioning frames, the interior of the discharge cylinder is provided with a cylinder rod extending downward, the lower end of the cylinder rod is welded with a curved pusher block adapted to the curved cooling groove, the lower end face of the annular cooling seat is provided with a discharge port for the curved pusher block to extend out, an elastic sealing door is installed on the discharge port, and a calcium carbide conveyor is installed below the discharge port.

[0014] A flue gas exhaust pipe is installed in the middle of the upper end of the furnace body. The upper end of the flue gas exhaust pipe is connected to a porous joint. Several groups of connecting pipes are connected to the porous joint. Each group of connecting pipes is inserted into the sealing interface position of the corresponding preheating cylinder. The number of preheating cylinders is preferably 2-3 groups.

[0015] As a preferred solution of the low-energy and energy-saving calcium carbide furnace described in the present invention, the preheating tube is located on the upper end surface of the furnace body, a preheating inner cavity is opened inside the preheating tube, a calcium carbide raw material hopper is vertically arranged in the middle position of the preheating inner cavity, the bottom of the calcium carbide raw material hopper is connected to a discharge pipe, the discharge pipe passes downward through the preheating tube into the interior of the furnace body, a control valve is installed on the discharge pipe, and a flue gas conveying pipe connected to the preheating inner cavity is installed on the upper side of the preheating tube, and the flue gas conveying pipe extends to the steam boiler area.

[0016] As a preferred solution of the low-energy and energy-saving calcium carbide furnace described in the present invention, two groups of feeding covers are symmetrically arranged on the upper end of the preheating cylinder, and a uniform speed motor is vertically installed between the two groups of feeding covers. The lower end of the uniform speed motor is connected to a stirring shaft through a coupling, and the stirring shaft is connected to the preheating cylinder through a second bearing seat. The stirring shaft extends downward into the interior of the calcium carbide raw material hopper, and a spiral stirring assembly is provided on the stirring shaft. An L-shaped connecting rod is welded to the upper side of the side of the stirring shaft, and a shaft sleeve is fixed to the lower end of the L-shaped connecting rod. A cleaning roller is rotatably arranged in the shaft sleeve, and the cleaning roller is fitted on the outer side of the calcium carbide raw material hopper, and several groups of first steel wire bristles are evenly distributed on the cleaning roller.

[0017] As a preferred solution of the low-energy and energy-saving calcium carbide furnace described in the present invention, the inner layer of the preheating cylinder is evenly provided with a dust collecting chamber, the lower end of the dust collecting chamber is connected with an ash discharge pipe, the ash discharge pipe extends downward through the preheating cylinder, and the inner wall of the preheating cavity is evenly provided with installation grooves, and an electrostatic dust collecting structure is rotatably arranged in each group of the installation grooves, and the number of the electrostatic dust collecting structures is preferably 3-5 groups.

[0018] As a preferred solution of the low-energy and energy-saving calcium carbide furnace described in the present invention, the electrostatic dust collection structure includes an annular dust collector, a charged unit area, an end cover, a short shaft, a third bearing seat and a sprocket. Several groups of charged unit areas are evenly distributed around the outer side surface of the annular dust collector. The number of the several groups of charged unit areas is preferably 4 groups. Each group of the charged unit areas extends into the preheating inner cavity when moving. End covers are symmetrically installed on the upper and lower ends of the annular dust collector. A short shaft is fixed on the end cover. The short shaft is fixed by the third bearing seat and the inner layer of the preheating cylinder, and a sprocket is sleeved on the upper short shaft.

[0019] As an optimal solution of the low-energy and energy-saving calcium carbide furnace described in the present invention, several groups of sprockets of the electrostatic dust collecting structure are uniformly connected and driven by an annular chain, and several groups of guide sprocket groups are evenly distributed on the annular chain. The number of the guide sprocket groups is preferably 3-5 groups, and the short shaft of one group of the electrostatic dust collecting structures is connected to the second servo motor by a coupling, and a circulating scraping structure is arranged on the outside of each group of the electrostatic dust collecting structures.

[0020] As an optimal solution of the low-energy and energy-saving calcium carbide furnace described in the present invention, each group of the circulating scraper structures is installed in the dust collecting chamber of the preheating cylinder, and the circulating scraper structure includes a frame, a side transmission unit, a driving motor, a surrounding chain plate, a connecting arm, a connecting bearing seat, a curved scraper wheel and a second steel wire brush. The side transmission units are symmetrically connected on both sides of the frame, one group of the side transmission units is equipped with a driving motor, and the two groups of side transmission units are internally and externally equipped with surrounding chain plates. Each group of the surrounding chain plates is evenly welded with several groups of connecting arms, and each group of the connecting arms extends outward. The end of the connecting arm is horizontally fixed with a connecting bearing seat, and a curved scraper wheel is installed between the two groups of symmetrical connecting bearing seats. The number of the curved scraper wheels is preferably 3-8 groups, and the curved scraper wheel is partially in contact with the charged unit area, and the curved scraper wheel moves straight downward along the charged unit area. Several groups of second steel wire brushes are evenly distributed on the outer surface of the curved scraper wheel.

[0021] The present invention provides a low-energy consumption and energy-saving calcium carbide furnace through improvement, which has the following significant improvements and advantages compared with the prior art: Open the discharge valve, and part of the molten calcium carbide flows into one group of curved cooling troughs. Then turn on the first servo motor, and after a series of transmissions, the groove wheel rotates, and the lower hollow positioning shaft drives the material distribution turntable to rotate a certain angle, so that the adjacent curved cooling troughs move to the bottom of the melt guide channel, and take turns to receive the materials so that the molten calcium carbide is evenly dispersed, thereby improving the cooling efficiency of the molten calcium carbide and solving the problem of poor heat dissipation and slow cooling time when the molten calcium carbide is concentrated together. During the circular motion of the molten calcium carbide in each group of curved cooling troughs, on the one hand, it fully contacts the heat-absorbing material layer along the winding path of the cooling outer tube, increasing the effective contact area and time, and using the absorbed heat to heat the water in the cooling outer tube to generate saturated steam that overflows upward from several groups of steam drainage short tubes and concentrates into the steam collecting pipe. On the other hand, the heat generated by the molten calcium carbide will be conducted inward to heat the water in the steam forming cavity to form saturated steam, which is absorbed from the steam suction hole and discharged outward from the steam discharge hole. It is introduced into the steam collecting pipe using the steam drainage long tube. The cooperation between the internal and external effectively solves the technical problem that the waste heat of calcium carbide is difficult to fully recycle and utilize, which is environmentally friendly and energy-saving. Start the uniform speed motor and the spiral stirring assembly will move in a spiral motion to stir the calcium carbide raw material. On the one hand, it is convenient for mixing and discharging limestone and coke, and on the other hand, it is convenient for the movement of internal hot air flow and uniform heating. With the help of the power of the stirring shaft, the L-shaped connecting rod drives the cleaning roller 77 to make a circular motion along the outer side of the calcium carbide raw material bucket, and uses several groups of first steel wire brushes to timely scrape the outer side of the calcium carbide raw material bucket to avoid dust accumulation on the bucket wall affecting the thermal conductivity, thereby effectively improving the preheating effect of the calcium carbide raw material. When the high-temperature flue gas flows in the preheating cavity, several groups of annular dust collectors distributed in the preheating cavity work to generate a high-voltage electric field, which absorbs a large number of negatively charged smoke particles. When the adsorption capacity of the charged unit area is saturated, the second servo motor is started to drive one group of annular dust collectors to rotate, and the transmission is connected through several groups of sprockets and annular chains, so that each group of annular dust collectors rotates synchronously, allowing the charged unit area that absorbs the smoke particles to move into the dust collecting chamber through rotation, and the adjacent charged unit areas are added to the preheating cavity for dust collection in turn, which effectively improves the dust collection effect, cleans a large amount of dust in the flue gas in advance, and avoids frequent cleaning of boiler pipes. The charged unit area that absorbs smoke particles is powered off. After some smoke particles lose the electromagnetic adsorption force, they fall off from the surface of the charged unit area. Then the drive motor is started, and the surrounding chain plate on the annular scraper structure continues to move clockwise. One set of curved scraper wheels is used to move straight downward along the charged unit area. The second wire brush is used to contact and scrape the remaining smoke particles on the charged unit area, and a reaction force is generated to cause the curved scraper wheel to rotate, thereby realizing rotating scraping, timely and thoroughly cleaning the dust on the electrostatic dust collection structure, and cooperating with the work of the annular dust collector to play an auxiliary role with a high degree of automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of a low-energy-consuming and energy-saving calcium carbide furnace in one direction of the present invention; Figure 2 This is a schematic diagram of the overall structure of a low-energy-consuming and energy-saving calcium carbide furnace according to the present invention from another direction; Figure 3 This is a schematic diagram of the annular cooling seat of the present invention from a top view; Figure 4 This is a schematic diagram of the annular cooling seat of the present invention when viewed from above; Figure 5 This is a structural diagram of the material distribution turntable of the present invention; Figure 6 Schematic diagram of the transmission structure of the material distribution turntable of the present invention; Figure 7 It is a cross-sectional view of the material distribution turntable of the present invention; Figure 8 Schematic diagram of the transmission structure of the elastic sealing door of the present invention; Figure 9 Schematic diagram of the external structure of the preheating cylinder of the present invention; Figure 10 is a cross-sectional view of the preheating cylinder of the present invention; Figure 11 Schematic diagram of the external structure of the stirring shaft of the present invention; Figure 12 This is a schematic diagram of the interior of the preheating cavity in the second embodiment of the present invention; Figure 13 This is a schematic diagram of the connection of the electrostatic dust collection structure in the second embodiment of the present invention; Figure 14 Schematic diagram of the specific structure of the electrostatic dust collection structure in the second embodiment of the present invention; Figure 15 It is a schematic diagram of the specific structure of the circulating scraping structure of the present invention.

[0023] Figure: 1, electrode holder; 2, furnace body; 3, melt diversion channel; 4, discharge valve; 5, annular cooling seat; 6, protective shell; 7, support base; 8, calcium carbide conveyor; 10, material distribution turntable; 11, curved cooling trough; 12, cooling outer pipe; 13, heat-absorbing material layer; 14, No. 1 water inlet branch pipe; 15, liquid distribution joint; 16, water supply main; 20, steam diversion short pipe; 21, steam collection pipe; 22, first steam transport pipe; 23, steam diversion long pipe; 30, upper hollow positioning shaft; 3 1. First bearing seat; 32. Lower hollow locating shaft; 33. Damping bearing seat; 34. Grooved pulley; 35. Grooved pulley; 36. Crank; 37. Drive column; 38. First servo motor; 40. Second water inlet branch pipe; 41. Sealed bearing; 42. Steam forming chamber; 43. Diversion platform; 44. Diversion trough; 45. Sealing seat; 46. Steam suction hole; 47. Steam discharge hole; 50. Discharge cylinder; 51. Positioning frame; 52. Cylinder rod; 53. Curved pusher block; 54. Elastic sealing door; 60. Flue gas discharge pipe; 61. Multi-porous joint; 62. Connecting pipe; 63. Preheating cylinder; 64. Sealing interface; 65. Preheating inner chamber; 66. Calcium carbide raw material hopper; 67. Discharge pipe; 68. Control valve; 69. Flue gas conveying pipe; 70. Feeding cover; 71. Constant-speed motor; 72. Stirring shaft; 73. Second bearing seat; 74. Spiral stirring assembly; 75. L-shaped connecting rod; 76. Bushing; 77. Cleaning roller; 78. First wire brush; 80. Electrostatic dust collection structure; 81. Annular dust collector; 82. Charged unit area; 83. End cover; 84. Short shaft; 85. Third bearing seat; 86. Sprocket; 90. Circular scraper structure; 91. Frame; 92. Side transmission unit; 93. Drive motor; 94. Surrounding chain plate; 95. Connecting arm; 96. Connecting bearing seat; 97. Curved scraper wheel; 98. Second wire brush; 100. Mounting groove; 101. Annular chain; 102. Second servo motor; 103. Guide sprocket assembly; 105. Ash discharge pipe. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention. Example

[0025] like Figures 1-10 As shown, this embodiment provides a low-energy-saving calcium carbide furnace, including an electrode seat 1 and a furnace body 2. The interior of the electrode seat 1 includes an electrode heating system. The furnace body 2 is located at the upper end of the electrode seat 1. The discharge port of the furnace body 2 extends outward and is connected to a melt guide channel 3. The melt guide channel 3 is made of thermal insulation material. A discharge valve 4 is installed at the lower end of the melt guide channel 3. The melt guide channel 3 is connected to the interior of the annular cooling seat 5.

[0026] Furthermore, a material distribution turntable 10 is rotatably provided in the middle position of the inner part of the annular cooling seat 5, and the upper and lower end surfaces of the material distribution turntable 10 are in contact with the inner wall of the annular cooling seat 5. A plurality of sets of curved cooling grooves 11 are evenly provided on the outer side surface of the material distribution turntable 10. The curved structure is used to adapt to the cooling outer tube 12. Calcium carbide is placed in the curved cooling groove 11. The inner part of the annular cooling seat 5 and the outer side of the material distribution turntable 10 are provided with a cooling outer tube 12. The inner side surface of the cooling outer tube 12 is provided with a heat-absorbing material layer 13 that interacts with the calcium carbide. The surface of the heat-absorbing material layer 13 is smooth and has excellent thermal conductivity. Figure 5 and Figure 6 shown.

[0027] The upper end of the cooling outer tube 12 passes through the annular cooling seat 5 and is connected to a first water inlet branch 14. The upper end of the first water inlet branch 14 is connected to a liquid separation joint 15. The upper end of the liquid separation joint 15 is connected to a water supply main 16. Figure 3 and Figure 5 shown.

[0028] Among them, the outer side surface of the cooling outer tube 12 extends upward and is evenly distributed with a plurality of groups of steam drainage short tubes 20. The upper ends of the plurality of steam drainage short tubes 20 are connected to the steam collecting pipe 21, which plays a role in timely and uniform drainage. The steam collecting pipe 21 is used for the flow of saturated steam. One side of the steam collecting pipe 21 is horizontally connected to the first steam transport pipe 22. The saturated steam in the first steam transport pipe 22 can be used for power generation or heating, such as Figure 3-Figure 5 shown.

[0029] In this embodiment, the upper middle position of the material distribution turntable 10 is vertically connected to the upper hollow positioning shaft 30, and the upper hollow positioning shaft 30 is fixed by the first bearing seat 31 and the inner wall of the annular cooling seat 5. Figure 3-Figure 6 shown.

[0030] In this embodiment, a lower hollow positioning shaft 32 is vertically connected to the middle position of the lower end of the distribution turntable 10. The interiors of the upper hollow positioning shaft 30 and the lower hollow positioning shaft 32 are both hollow flow channels. The lower end of the lower hollow positioning shaft 32 is connected to the support base 7 through a damping bearing seat 33. The damping bearing seat 33 provides a certain damping force to prevent the distribution turntable 10 from inertial movement. Figure 3-Figure 6 shown.

[0031] Furthermore, a groove wheel 34 is sleeved on the middle part of the lower hollow positioning shaft 32, and the groove wheel 34 is limitedly set inside the protective shell 6. The lower end of the annular cooling seat 5 is connected to the supporting base 7 by the protective shell 6, as shown in FIG. Figure 4 and Figure 6 shown.

[0032] Among them, a plurality of groups of wheel grooves 35 are evenly distributed on the wheel surface of the groove wheel 34, and each group of wheel grooves 35 is for a driving column 37 to extend into and move. The driving column 37 is installed at an eccentric position of a crank 36, and the crank 36 is sleeved on the output shaft of the first servo motor 38. The first servo motor 38 is vertically fixed inside the protective shell 6, as shown in FIG. Figure 6 shown.

[0033] Furthermore, the side of the liquid separation joint 15 is connected to a second water inlet branch pipe 40, the lower end of the second water inlet branch pipe 40 is vertically inserted into the interior of the upper hollow positioning shaft 30, and the second water inlet branch pipe 40 and the upper hollow positioning shaft 30 are connected by a sealed bearing 41, and the second water inlet branch pipe 40 and the upper hollow positioning shaft 30 move relative to each other around the sealed bearing 41, as shown in FIG. Figure 3-Figure 7 shown.

[0034] Specifically, a steam forming chamber 42 is provided at the inner center position of the distributing turntable 10, the upper hollow positioning shaft 30 is connected to the steam forming chamber 42, a guide platform 43 is provided in the middle position of the steam forming chamber 42, and the guide platform 43 is designed to prevent water from flowing into the steam suction hole 46. Several groups of guide grooves 44 are evenly arranged on the surface of the guide platform 43, and the middle position of the lower end surface of the guide platform 43 is connected to the bottom of the steam forming chamber 42 by a sealing seat 45. A steam suction hole 46 is provided at the upper position of the sealing seat 45, and the liquid level of the steam forming chamber 42 is lower than the position of the steam suction hole 46. A steam discharge hole 47 is provided at the lower position of the lower hollow positioning shaft 32, and the steam suction hole 46 is connected to the steam discharge hole 47. Figure 3-Figure 7 shown.

[0035] Among them, the steam collecting pipe 21 is connected to a steam drainage long pipe 23 on the side away from the first steam transport pipe 22. The steam drainage long pipe 23 extends downward and is inserted into the inner part of the support base 7 near the steam discharge hole 47. Figure 3 And convex 4 shown.

[0036] Furthermore, a discharge cylinder 50 is installed at the upper end of the annular cooling seat 5 through two sets of positioning frames 51. A cylinder rod 52 is movably provided downwardly extending from the inside of the discharge cylinder 50. A curved pusher block 53 adapted to the curved cooling groove 11 is welded to the lower end of the cylinder rod 52. A discharge port for the curved pusher block 53 to extend out is provided on the lower end surface of the annular cooling seat 5. The discharge port is connected to the curved cooling groove 11. An elastic sealing door 54 is installed on the discharge port. The elastic sealing door 54 has the function of automatic elastic reset, such as Figure 3 and Figure 8 shown.

[0037] Among them, a calcium carbide conveyor 8 is installed below the discharge port. Figure 1 shown.

[0038] Furthermore, a flue gas exhaust pipe 60 is installed in the middle of the upper end of the furnace body 2. The upper end of the flue gas exhaust pipe 60 is connected to a porous joint 61. The porous joint 61 is connected to a plurality of connecting pipes 62. Each group of connecting pipes 62 is inserted into the sealing interface 64 of the corresponding preheating cylinder 63. Figure 1 、 Figure 2 and Figure 9 shown.

[0039] Specifically, the preheating cylinder 63 is located on the upper end surface of the furnace body 2, and a preheating inner cavity 65 is opened inside the preheating cylinder 63. A calcium carbide raw material hopper 66 is vertically arranged in the middle position of the preheating inner cavity 65. The bottom of the calcium carbide raw material hopper 66 is connected to a discharge pipe 67, which passes downward through the preheating cylinder 63 and enters the interior of the furnace body 2. A control valve 68 is installed on the discharge pipe 67. A flue gas conveying pipe 69 connected to the preheating inner cavity 65 is installed on the upper side of the preheating cylinder 63. The flue gas conveying pipe 69 extends to the steam boiler area, as shown in FIG. Figure 9 and Figure 10 shown.

[0040] Among them, two sets of feeding covers 70 are symmetrically arranged at the upper end of the preheating cylinder 63. When the feeding covers 70 are opened, the calcium carbide raw material hopper 66 can be fed. A uniform speed motor 71 is vertically installed between the two sets of feeding covers 70. The lower end of the uniform speed motor 71 is connected to a stirring shaft 72 through a coupling. The stirring shaft 72 is connected to the preheating cylinder 63 through a second bearing seat 73. The stirring shaft 72 extends downward into the interior of the calcium carbide raw material hopper 66. A spiral stirring component 74 is provided on the stirring shaft 72. The spiral stirring component 74 is similar to a spiral conveying blade and can push the material upward to form an internal circulation, such as Figure 1 、 Figure 10 and Figure 11 shown.

[0041] Among them, an L-shaped connecting rod 75 is welded to the upper side of the stirring shaft 72, and a shaft sleeve 76 is fixed to the lower end of the L-shaped connecting rod 75. A cleaning roller 77 is rotatably arranged in the shaft sleeve 76. The cleaning roller 77 rotates around the shaft sleeve 76. The cleaning roller 77 is fitted on the outer side of the calcium carbide raw material bucket 66. Several groups of first steel wire bristles 78 are evenly distributed on the cleaning roller 77. The steel wire bristles have both metal hardness and flexibility. Figure 11 shown.

[0042] When this embodiment is in use, the molten calcium carbide produced in the furnace body 2 continuously enters the melt guide channel 3 from the discharge port, the discharge valve 4 is opened, and part of the molten calcium carbide flows into one group of curved cooling grooves 11, and then the first servo motor 38 is turned on to drive the crank 36 to rotate, and the driving column 37 to make a circular motion, and in the process of the circular motion, it enters one group of wheel grooves 35 of the groove wheel 34. The two interact with each other, causing the groove wheel 34 to rotate, and the lower hollow positioning shaft 32 drives the material distribution turntable 10 to rotate a certain angle, so that the adjacent curved cooling grooves 11 are rotated. The groove 11 moves to the bottom of the melt guide channel 3, and takes turns to receive the material so that the molten calcium carbide is evenly dispersed. The molten calcium carbide in each group of curved cooling grooves 11 is in full contact with the heat-absorbing material layer 13 along the winding path of the cooling outer tube 12 during the circular motion, so as to absorb heat and cool the molten calcium carbide. At the same time, the absorbed heat is used to heat the water in the cooling outer tube 12, and saturated steam is generated. It overflows upward from several groups of steam diversion short tubes 20, is concentrated into the steam collecting pipe 21, and is transported outward from the first steam transport pipe 22.

[0043] At the same time, the heat generated by the molten calcium carbide in the curved cooling groove 11 will be conducted inward and enter the steam forming chamber 42 inside the material distribution turntable 10, heating the water in the chamber to form saturated steam, which will be absorbed from the steam suction hole 46, and after being guided by the lower hollow positioning shaft 32, the saturated steam will be discharged outward from the steam discharge hole 47, and introduced into the steam collecting pipe 21 by the steam diversion long tube 23. By allowing the No. 2 water inlet branch pipe 40 to inject water into the steam forming chamber 42, the cooling water falls onto the guide platform 43, and is drained through several groups of guide grooves 44 to enter the bottom of the steam forming chamber 42, thereby achieving the purpose of water replenishment.

[0044] As the temperature of the molten calcium carbide in the curved cooling trough 11 decreases and becomes solid, until the temperature of the solid calcium carbide drops to a certain value, the unloading cylinder 50 is started, and the cylinder rod 52 extends downward, driving the curved pushing block 53 to extend into the curved cooling trough 11 below, moving along the trough wall, squeezing the solid calcium carbide in the trough downward, causing the elastic sealing door 54 to be pressed open, and the solid calcium carbide falls onto the calcium carbide conveyor 8 below and is transported outward, cooperating with the intermittent movement of the material distribution turntable 10 to realize rotational unloading.

[0045] The high-temperature flue gas generated in the furnace body 2 moves upward along the flue gas exhaust pipe 60, and flows into the corresponding preheating cavity 65 of the preheating cylinder 63 through several groups of connecting pipes 62, continues to flow upward and preheats the calcium carbide raw materials (limestone and coke) in the calcium carbide raw material bucket 66, and then is transported outward to the steam boiler area through the flue gas conveying pipe 69. At the same time, the uniform speed motor 71 is started, and the stirring shaft 72 drives the spiral stirring assembly 74 to move spirally to stir the calcium carbide raw materials. On the one hand, it is convenient for the mixing and discharging of limestone and coke, and on the other hand, it is convenient for the movement of internal hot air flow and uniform heating. While the stirring shaft 72 rotates, the L-shaped connecting rod 75 drives the cleaning roller 77 to make a circular motion along the outer surface of the calcium carbide raw material bucket 66, and several groups of first steel wire brushes 78 are used to scrape the outer surface of the calcium carbide raw material bucket 66 to prevent dust accumulation on the bucket wall from affecting the heat conduction efficiency. Example

[0046] On the basis of Example 1, the high-temperature flue gas carries a large amount of smoke dust, which not only reduces the thermal conductivity of the calcium carbide raw material bucket 66, but also accumulates on the pipe wall of the steam boiler when the high-temperature flue gas enters the pipe of the steam boiler, which also affects the thermal conductivity. Cleaning the complex steam boiler pipe is time-consuming and labor-intensive, and the work efficiency is low. In order to solve the above technical problems, we evenly open a dust collecting chamber on the inner layer of the preheating cylinder 63, and the lower end of the dust collecting chamber is connected to an ash discharge pipe 105. The ash discharge pipe 105 extends downward through the preheating cylinder 63, and the inner wall of the preheating cavity 65 is evenly opened with mounting grooves 100. The mounting grooves 100 play a storage role. An electrostatic dust collecting structure 80 is rotatably set in each group of mounting grooves 100. Figure 12-15 shown.

[0047] Specifically, the electrostatic dust collecting structure 80 includes an annular dust collector 81, a charged unit area 82, an end cover 83, a short shaft 84, a third bearing seat 85 and a sprocket 86. Figure 14 shown.

[0048] In this embodiment, the annular dust collector 81 has a built-in anode and cathode, and high-voltage direct current is applied between the two to form a strong electric field. Several groups of charged unit areas 82 are evenly distributed around the outer side of the annular dust collector 81. Each group of charged unit areas 82 extends into the preheating cavity 65 when moving. End covers 83 are symmetrically installed on the upper and lower ends of the annular dust collector 81. A short shaft 84 is fixed on the end cover 83. The short shaft 84 is fixed by using a third bearing seat 85 and the inner layer of the preheating cylinder 63, and a sprocket 86 is sleeved on the upper short shaft 84.

[0049] Furthermore, the sprockets 86 of several groups of electrostatic dust collecting structures 80 are uniformly connected and driven by an annular chain 101. Several groups of guide sprocket groups 103 are evenly distributed on the annular chain 101. The guide sprocket group 103 includes a guide sprocket, which plays a role in limiting and tensioning the annular chain 101. The short shaft 84 of one group of electrostatic dust collecting structures 80 is connected to the second servo motor 102 by a coupling. A circulating scraping structure 90 is provided on the outside of each group of electrostatic dust collecting structures 80. Each group of circulating scraping structures 90 is installed in the dust collecting inner chamber of the preheating cylinder 63, such as Figure 12 and Figure 13 shown.

[0050] Specifically, the circulating scraping structure 90 includes a frame 91, a side transmission unit 92, a drive motor 93, a surrounding chain plate 94, a connecting arm 95, a connecting bearing seat 96, a curved scraping wheel 97 and a second wire brush 98. Figure 15 shown.

[0051] In this embodiment, side transmission units 92 are symmetrically connected to both sides of the frame 91. The side transmission units 92 include a transmission sprocket group. A drive motor 93 is installed on one group of side transmission units 92. A surrounding chain plate 94 is installed inside the two groups of side transmission units 92 and on the outside of the frame 91.

[0052] In this embodiment, each group of surrounding chain plates 94 is evenly welded with several groups of connecting arms 95, each group of connecting arms 95 extends outward, and a connecting bearing seat 96 is horizontally fixed to the end of the connecting arm 95. A curved scraper wheel 97 is installed between the two groups of symmetrical connecting bearing seats 96, and the curved scraper wheel 97 rotates around the connecting bearing seat 96. The curved scraper wheel 97 is partially fitted with the charged unit area 82. The wheel surface of the curved scraper wheel 97 is concave and curved, and is compatible with the annular surface of the annular dust collector 81. The curved scraper wheel 97 moves downward in a straight line along the charged unit area 82. Several groups of second steel wire bristles 98 are evenly distributed on the outer surface of the curved scraper wheel 97. The curved scraper wheel 97 scrapes while rotating, which is more uniform and efficient.

[0053] When this embodiment is in use, when the high-temperature flue gas flows in the preheating cavity 65, several groups of annular dust collectors 81 distributed in the preheating cavity 65 are operated to generate a high-voltage electric field, so that the smoke in the high-temperature flue gas is negatively charged. At this time, a group of charged unit areas 82 in the preheating cavity 65 are energized to adsorb a large number of negatively charged smoke particles. When the adsorption capacity of the charged unit areas 82 is saturated, the second servo motor 102 is started to drive one group of annular dust collectors 81 to rotate, and the transmission is connected through several groups of sprockets 86 and annular chains 101, so that each group of annular dust collectors 81 rotates synchronously, and the charged unit areas 82 that adsorb smoke particles are moved into the dust collecting chamber through rotation, and the adjacent charged unit areas 82 are added to the preheating cavity 65 for dust collection in turn.

[0054] The charged unit area 82 that absorbs the smoke particles is powered off. After losing the electromagnetic adsorption force, some of the smoke particles fall off from the surface of the charged unit area 82, enter the bottom of the dust collecting chamber, and are discharged outward from the dust discharge pipe 105. Then the drive motor 93 is started, and the surrounding chain plate 94 on the circulating scraper structure 90 continues to move clockwise. One group of curved scraper wheels 97 is used to move straight downward along the charged unit area 82, and the second steel wire brush 98 is used to contact and scrape the remaining smoke particles on the charged unit area 82, and generate a reaction force to cause the curved scraper wheel 97 to rotate, thereby realizing rotating scraping. Each group of curved scraper wheels 97 works in turn, and the cycle is repeated.

[0055] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0056] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A low-energy-consumption and energy-saving calcium carbide furnace, comprising a furnace body (2) and a preheating cylinder (63), characterized in that: The discharge port of the furnace body (2) extends outward and is connected to a melt guide channel (3), the melt guide channel (3) is connected to the inside of the annular cooling seat (5), a material distribution turntable (10) is rotatably provided in the middle position inside the annular cooling seat (5), a plurality of sets of curved cooling grooves (11) are evenly provided on the outer side surface of the material distribution turntable (10), and a cooling outer tube (12) is provided inside the annular cooling seat (5) and on the outer side of the material distribution turntable (10); A plurality of groups of steam drainage short tubes (20) are evenly distributed on the outer side surface of the cooling outer tube (12) extending upward, and the upper ends of the plurality of groups of steam drainage short tubes (20) are connected to a steam collecting pipe (21), and the steam collecting pipe (21) is used for the flow of saturated steam; The preheating cylinder (63) is located on the upper end surface of the furnace body (2), and a preheating inner cavity (65) is provided inside the preheating cylinder (63). A calcium carbide raw material hopper (66) is vertically provided in the middle position of the preheating inner cavity (65). A uniform speed motor (71) is vertically installed in the middle position of the upper end surface of the preheating cylinder (63). The lower end of the uniform speed motor (71) is connected to a stirring shaft (72) through a coupling. The stirring shaft (72) extends downward into the calcium carbide raw material hopper (66). ), a spiral stirring assembly (74) is provided on the stirring shaft (72), an L-shaped connecting rod (75) is welded to the upper side of the stirring shaft (72), a shaft sleeve (76) is fixed to the lower end of the L-shaped connecting rod (75), a cleaning roller (77) is rotatably provided in the shaft sleeve (76), the cleaning roller (77) is fitted on the outer side of the calcium carbide raw material bucket (66), and a plurality of groups of first steel wire bristles (78) are evenly distributed on the cleaning roller (77).

2. The low-energy-consumption and energy-saving calcium carbide furnace according to claim 1, characterized in that: The furnace body (2) is located at the upper end of the electrode seat (1), the lower end of the melt guide channel (3) is installed with a discharge valve (4), the upper end of the cooling outer tube (12) passes through the annular cooling seat (5) and is connected to a first water inlet branch pipe (14), the upper end of the first water inlet branch pipe (14) is connected to a liquid separation joint (15), the upper end of the liquid separation joint (15) is connected to a water supply main pipe (16), one side of the steam collecting pipe (21) is horizontally connected to a first steam transport pipe (22); the inner side surface of the cooling outer tube (12) is provided with a heat absorbing material layer (13) that interacts with the calcium carbide.

3. The low-energy-consumption and energy-saving calcium carbide furnace according to claim 2, characterized in that: An upper hollow positioning shaft (30) is vertically connected to the middle position of the upper end of the material distribution turntable (10), and the upper hollow positioning shaft (30) is fixed through the first bearing seat (31) and the inner wall of the annular cooling seat (5). A lower hollow positioning shaft (32) is vertically connected to the middle position of the lower end of the material distribution turntable (10), and the lower end of the lower hollow positioning shaft (32) is connected to the support base (7) through the damping bearing seat (33). A groove wheel (34) is sleeved on the middle part of the lower hollow positioning shaft (32), and the groove wheel (34) is limitedly set inside the protective shell (6). The lower end of the annular cooling seat (5) is connected to the support base (7) using the protective shell (6).

4. The low-energy-consumption and energy-saving calcium carbide furnace according to claim 3, characterized in that: The side of the liquid separation joint (15) is connected to a No. 2 water inlet branch pipe (40), the lower end of the No. 2 water inlet branch pipe (40) is vertically inserted into the interior of the upper hollow positioning shaft (30), and the No. 2 water inlet branch pipe (40) and the upper hollow positioning shaft (30) are connected by a sealing bearing (41). A steam forming chamber (42) is opened at the center position of the inner part of the material distribution turntable (10), and the upper hollow positioning shaft (30) and the steam forming chamber (42) are connected. A guide platform (43) is provided in the middle position of the steam forming chamber (42), and a plurality of groups of guide grooves (44) are evenly arranged on the surface of the guide platform (43). ), the middle position of the lower end surface of the guide platform (43) is connected to the bottom of the steam forming chamber (42) by using a sealing seat (45), a steam suction hole (46) is opened at the upper position of the sealing seat (45), a steam discharge hole (47) is opened at the lower position of the lower hollow positioning shaft (32), the steam suction hole (46) and the steam discharge hole (47) are connected, and a steam drainage long tube (23) is connected to the side of the steam collecting pipe (21) away from the first steam transport pipe (22), and the steam drainage long tube (23) extends downward and is inserted into the interior of the support base (7) near the steam discharge hole (47).

5. The low-energy-consumption and energy-saving calcium carbide furnace according to claim 4, characterized in that: A discharge cylinder (50) is installed at the upper end of the annular cooling seat (5) through two sets of positioning frames (51), and a cylinder rod (52) is movably provided downwardly extending from the inside of the discharge cylinder (50), and a curved pusher block (53) adapted to the curved cooling groove (11) is welded to the lower end of the cylinder rod (52). A discharge port for the curved pusher block (53) to extend out is provided on the lower end surface of the annular cooling seat (5), and an elastic sealing door (54) is installed on the discharge port. A calcium carbide conveyor (8) is installed below the discharge port.

6. The low-energy-consumption and energy-saving calcium carbide furnace according to claim 1, characterized in that: A flue gas exhaust pipe (60) is installed in the middle of the upper end of the furnace body (2), and the upper end of the flue gas exhaust pipe (60) is connected to a porous joint (61), and a plurality of groups of connecting pipes (62) are connected to the porous joint (61), and each group of connecting pipes (62) is respectively inserted into the sealing interface (64) position of the corresponding preheating cylinder (63); The bottom of the calcium carbide raw material hopper (66) is connected to a discharge pipe (67), which passes downward through the preheating cylinder (63) and enters the interior of the furnace body (2). A control valve (68) is installed on the discharge pipe (67). A flue gas conveying pipe (69) connected to the preheating inner cavity (65) is installed at the upper position of the side of the preheating cylinder (63), and the flue gas conveying pipe (69) extends to the steam boiler area.

7. The low-energy-consumption and energy-saving calcium carbide furnace according to claim 6, characterized in that: The inner layer of the preheating cylinder (63) is evenly provided with a dust collecting chamber, the lower end of the dust collecting chamber is connected to an ash discharge pipe (105), and the ash discharge pipe (105) extends downward through the preheating cylinder (63). The inner wall of the preheating cavity (65) is evenly provided with mounting grooves (100), and an electrostatic dust collecting structure (80) is rotatably arranged in each group of the mounting grooves (100).

8. The low-energy-consumption and energy-saving calcium carbide furnace according to claim 7, characterized in that: The electrostatic dust collecting structure (80) includes an annular dust collector (81), a charged unit area (82), an end cover (83), a short shaft (84), a third bearing seat (85) and a sprocket (86). Several groups of charged unit areas (82) are evenly distributed around the outer side surface of the annular dust collector (81). Each group of charged unit areas (82) extends into the preheating inner cavity (65) when moving. The upper and lower ends of the annular dust collector (81) are symmetrically equipped with end covers (83). A short shaft (84) is fixed on the end cover (83). The short shaft (84) is fixed by using the third bearing seat (85) and the inner layer of the preheating cylinder (63). A sprocket (86) is sleeved on the short shaft (84).

9. The low-energy-consumption and energy-saving calcium carbide furnace according to claim 8, characterized in that: The sprockets (86) of the plurality of groups of electrostatic dust collecting structures (80) are uniformly connected and driven by an annular chain (101), and a plurality of guide sprocket groups (103) are evenly distributed on the annular chain (101). The short shaft (84) of one group of the electrostatic dust collecting structures (80) is connected to a second servo motor (102) by a coupling, and a circulating scraping structure (90) is provided on the outer side of each group of the electrostatic dust collecting structures (80).

10. The low-energy-consumption and energy-saving calcium carbide furnace according to claim 9, characterized in that: Each group of the circulating scraping structure (90) is installed in the dust collecting chamber of the preheating cylinder (63), and the circulating scraping structure (90) includes a frame (91), a side transmission unit (92), a driving motor (93), a surrounding chain plate (94), a connecting arm (95), a connecting bearing seat (96), a curved scraping wheel (97) and a second wire brush (98). The side transmission units (92) are symmetrically connected to both sides of the frame (91), and the surrounding chain plates (94) are installed inside the two groups of the side transmission units (92) and on the outside of the frame (91). Each group A plurality of groups of connecting arms (95) are evenly welded on the surrounding chain plate (94), each group of the connecting arms (95) extends outward, and a connecting bearing seat (96) is horizontally fixed to the end of the connecting arm (95), and a curved scraper wheel (97) is installed between the two groups of symmetrical connecting bearing seats (96), and the curved scraper wheel (97) is partially fitted with the charged unit area (82). The curved scraper wheel (97) moves straight downward along the charged unit area (82), and a plurality of groups of second steel wire bristles (98) are evenly distributed on the outer surface of the curved scraper wheel (97).

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