Dustproof carbon material drying device for calcium carbide furnace

Abstract

The application belongs to the technical field of carbon material drying, and specifically discloses a dustproof calcium carbide furnace carbon material drying device, which comprises a box body, a supporting mechanism is connected to the lower part of one side of the inner wall of the box body, a heat preservation cylinder is arranged above the supporting mechanism, a drying cylinder is connected to the inner wall of the heat preservation cylinder, a discharging mechanism is connected to one side of the box body through a connecting block, an exhaust mechanism is connected to one side of the upper end of the discharging mechanism, a pretreatment feeding mechanism is connected to one side of the inside of the box body, the pretreatment feeding mechanism comprises a fixed cylinder, one side of the fixed cylinder is connected to one side of the inner wall of the box body, a rotating opening is formed in one side of the fixed cylinder, and a pretreatment cylinder is rotatably connected to the fixed cylinder in a bearing manner at the position corresponding to the rotating opening, and the dustproof calcium carbide furnace carbon material drying device is characterized in that the pretreatment feeding mechanism and the exhaust mechanism are cooperatively designed, so that the low-oxygen safe pre-drying of carbon material, the pre-separation of wet fine powder and the recycling of waste gas heat energy are realized.

Description

A dustproof calcium carbide furnace carbon drying device Technical Field

[0001] This invention belongs to the field of carbon material drying, and specifically discloses a dustproof calcium carbide furnace carbon material drying device. Background Technology

[0002] Calcium carbide (calcium carbide) production is a typical high-energy-consuming industrial process. Its core reaction takes place in a calcium carbide furnace, where quicklime and carbon materials react at a high temperature of about 2000°C to produce calcium carbide. This reaction is extremely sensitive to the moisture content of the carbon materials (mainly coke and semi-coke). If the moisture content of the carbon materials is too high, the water will vaporize instantly after entering the furnace, which will not only cause violent fluctuations in the furnace pressure and safety accidents such as material spraying, but also significantly increase the power consumption of the electric furnace due to the heat absorption of evaporation. At the same time, it will destroy the stability of the furnace charge resistance, seriously affecting the quality and output of calcium carbide products.

[0003] Currently, the industry mainly uses rotary dryers to dry carbon materials. However, when drying semi-coke, because semi-coke is flammable and explosive, it begins to release a large amount of gas when the drying temperature exceeds 300°C. If it mixes with air, it can easily form an explosive gas, posing a serious safety hazard to traditional hot air drying. Furthermore, semi-coke has low mechanical strength and is brittle. When it is thrown by the lifting plates and collided with materials in the rotary dryer, it is very easy to break and generate a large amount of debris. This not only causes raw material loss but also leads to a surge in dust load in the equipment, exacerbating the subsequent dust removal pressure and environmental risks. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a dustproof calcium carbide furnace carbon drying device.

[0005] To achieve the above objectives, the present invention provides a dustproof calcium carbide furnace carbon drying device, including a box body, a support mechanism connected to the lower part of one side of the inner wall of the box body, a heat insulation cylinder arranged above the support mechanism, a drying cylinder connected to the inner wall of the heat insulation cylinder, a discharge mechanism connected to one side of the box body through a connecting block, and an exhaust mechanism connected to the upper side of the discharge mechanism.

[0006] A pre-processing feeding mechanism is connected to one side of the inside of the box;

[0007] The pretreatment feeding mechanism includes a fixed cylinder, one side of which is connected to one side of the inner wall of the box. A rotating port is opened on one side of the fixed cylinder. A pretreatment cylinder is rotatably connected to the fixed cylinder at the corresponding rotating port via a bearing. One end of the pretreatment cylinder extends through into the interior of the insulation cylinder. A connecting clamp is connected to one side of the box. A feeding pipe is connected to the middle of one side of the connecting clamp. An air supply mechanism is connected to one side of the inner wall of the connecting clamp. Material guide plates are connected to the inner walls of the pretreatment cylinder. The material guide plates are spirally arranged. A screen is circumferentially embedded on the outer wall of the pretreatment cylinder at the corresponding position inside the fixed cylinder. A rotating mechanism is connected to one side of the inner wall of the fixed cylinder.

[0008] Preferably, the support mechanism includes a support plate, one side of which is connected to one side of the inner wall of the box. Both sides of the upper end of the support plate are connected to connecting frames. Both sides of the upper end of the two connecting frames are rotatably connected to rollers. The upper ends of the two rollers at the upper end of one connecting frame and the two rollers at the upper end of the other connecting frame are rolledly connected to a stabilizing ring. The inner wall of the stabilizing ring is connected to both sides of the outer wall of the insulation cylinder.

[0009] Preferably, a drive motor is connected to one side of the upper end of the support plate, and a drive gear is driven to the output end of the drive motor. A drive gear ring is connected to the outer wall of the insulation cylinder at the location corresponding to the drive gear, and one side of the drive gear meshes with the drive gear ring.

[0010] Preferably, the discharge mechanism includes a discharge housing, one side of which is connected to one side of the box body. A discharge pipe is connected to one side of the lower end of the discharge housing, and a discharge pipe is connected to the other side of the lower end of the discharge housing. Discharge valves are connected to the outer walls of both the discharge pipe and the discharge tube. One end of the drying cylinder extends through into the interior of the discharge housing. An opening is provided on one side of the discharge housing corresponding to the drying cylinder. The drying cylinder is located inside the opening. Filter holes are provided circumferentially on the outer wall of the drying cylinder above the discharge pipe. An air inlet pipe is connected to the middle of one side of the discharge housing, and an air inlet valve is connected to one side of the outer wall of the air inlet pipe.

[0011] Preferably, one end of the pretreatment cylinder is located inside the fixed cylinder, one end of the connecting clamp cylinder passes through the box body and the pretreatment cylinder in sequence and extends into the pretreatment cylinder, a guide ring is connected to one side of the outer wall of the connecting clamp cylinder, the cross-sectional shape of the guide ring is inclined, one end of the feed pipe extends through into the connecting clamp cylinder, the lower end of the feed pipe is inclined, and the other end of the feed pipe is funnel-shaped.

[0012] Preferably, the gas conveying mechanism includes a material conveying ring pipe located inside the connecting cylinder. One side of the material conveying ring pipe is connected to one side of the inner wall of the connecting cylinder via an mounting block. The connecting cylinder is sleeved on one side of the outer wall of the feed pipe. One side of the material conveying ring pipe is circumferentially connected with a conveying pipe. Filter blocks are embedded on one side of the inner wall of multiple conveying pipes. A gas conveying pipe is connected to the middle of the upper end of the material conveying ring pipe. The upper end of the gas conveying pipe passes through the upper end of the connecting cylinder in sequence. A gas conveying valve is connected to the upper part of the outer wall of the gas conveying pipe.

[0013] Preferably, the rotating mechanism includes a slip ring, the outer wall of which is connected to one side of the inner wall of the fixed cylinder. A groove is formed in the middle of the inner wall of the slip ring. Slider blocks are connected to the upper and lower parts of the outer wall of the pretreatment cylinder corresponding to the grooves. The two sliders slide inside the grooves. A rotary motor is connected to the upper part of the inner wall of the pretreatment cylinder corresponding to the slip ring. A rotary gear is connected to the outer wall of the output end of the rotary motor. A rotary gear ring is connected to the lower part of the outer wall of the pretreatment cylinder corresponding to the rotary gear. The lower end of the rotary gear meshes with the rotary gear ring.

[0014] Preferably, a discharge port is provided at the middle of the lower end of the fixed cylinder, and a receiving box is connected to the lower end of the inner wall of the box corresponding to the discharge port.

[0015] Preferably, the exhaust mechanism includes an exhaust pipe, the lower end of which is connected to one side of the upper end of the discharge housing, a dust removal device is connected to the upper end of the exhaust pipe, a support plate is connected to one side of the dust removal device, an air pump is connected to the upper end of the support plate, the input end of the air pump is connected to one side of the dust removal device, a mixing cylinder is connected to the output end of the air pump, an air inlet pipe is connected to one side of the upper end of the mixing cylinder, a connecting pipe is connected to one end of the mixing cylinder, and one end of the connecting pipe is connected to the upper end of the air delivery pipe.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] By transporting the purified and conditioned low-oxygen circulating gas from the exhaust system to the pretreatment cylinder, a stable oxygen-deficient pre-drying environment is created and maintained for the wet semi-coke before it enters the main high-temperature drying zone. This allows the volatile components in the semi-coke to precipitate under oxygen-deficient conditions during the initial heating stage, thereby avoiding the risk of flash explosion caused by the accumulation of volatiles in the semi-coke carbon material when it encounters oxygen. This achieves inherently safe pretreatment of high-volatile carbon materials.

[0018] During the pretreatment stage, the wet carbon material is gently turned over by the spiral guide plate, and the wet fine powder contained therein is separated in real time through the circumferential screen and collected through the discharge port. This achieves the removal of fine powder before the material is dried, which not only reduces the amount of fine powder entering the main drying cylinder and improves the yield of block carbon, but also avoids a large amount of wet fine powder entering the high-temperature zone and consuming ineffective heat energy, thus improving the overall heat utilization efficiency of the system from the source.

[0019] The high-temperature exhaust gas discharged from the drying drum is combined with the exhaust gas from the pretreatment section. After dust removal and purification, it is introduced into the pretreatment section for recycling. This transforms the waste heat from the originally directly discharged exhaust gas into an effective heat source for pretreatment, achieving efficient recovery and recycling of heat energy. Attached Figure Description

[0020] Figure 1 is a schematic diagram of the overall structure of the device of the present invention;

[0021] Figure 2 is a schematic diagram of the internal structure of the box body of the present invention;

[0022] Figure 3 is a schematic diagram of the connection structure between one end of the pretreatment cylinder and the drying cylinder of the present invention.

[0023] Figure 4 is an overall cross-sectional view of the device of the present invention;

[0024] Figure 5 is an enlarged structural schematic diagram of point A in Figure 4 of the present invention;

[0025] Figure 6 is a cross-sectional view of the fixed cylinder and the pretreatment cylinder of the present invention;

[0026] Figure 7 is a schematic diagram of the meshing connection structure between the rotating gear ring and the rotating gear of the present invention;

[0027] Figure 8 is a schematic diagram of the installation structure of the screen of the present invention;

[0028] Figure 9 is a schematic diagram of the installation structure of the material guiding and lifting plate of the present invention.

[0029] In the diagram: 1. Box body; 2. Support plate; 3. Connecting frame; 4. Support roller; 5. Stabilizing ring; 6. Insulation cylinder; 7. Drying cylinder; 8. Drive motor; 9. Drive gear; 10. Drive gear ring; 11. Discharge shell; 12. Ash discharge pipe; 13. Discharge pipe; 14. Ash filter hole; 15. Air inlet pipe; 16. Fixed cylinder; 17. Pretreatment cylinder; 18. Connecting clamp; 19. Feed pipe; 20. Conveying ring pipe; 21. Conveying pipe; 22. Air conveying pipe; 23. Slip ring; 24. Sliding block; 25. Rotary motor; 26. Rotary gear; 27. Guide plate; 28. Screen; 29. ​​Discharge port; 30. Receiving box; 31. Air outlet pipe; 32. Dust removal equipment; 33. Air pump; 34. Mixing cylinder; 35. Air inlet pipe; 36. Connecting pipe; 37. Rotary gear ring. Detailed Implementation

[0030] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the invention is not limited to the specific embodiments disclosed below.

[0032] As shown in Figures 1-9, a dustproof calcium carbide furnace carbon drying device includes a housing 1. A support mechanism is connected to the lower part of one side of the inner wall of the housing 1. The support mechanism can be used to support and connect the heat preservation cylinder 6 and the drying cylinder 7. The heat preservation cylinder 6 is set above the support mechanism, and the heat preservation cylinder 6 can keep the drying cylinder 7 warm. The drying cylinder 7 is connected to the inner wall of the heat preservation cylinder 6. The drying cylinder 7 is open at both ends to facilitate the entry and exit of materials. A discharge mechanism is connected to one side of the housing 1 through a connecting block. The discharge mechanism can screen out small particles of carbon before discharge. An exhaust mechanism is connected to the upper side of the discharge mechanism. A pre-treatment feeding mechanism is connected to one side of the inside of the housing 1. The pre-treatment feeding mechanism includes a fixed cylinder 16. The fixed cylinder 16... The side of the fixed cylinder 16 is connected to the inner wall of the box body 1. A rotating port is opened on one side of the fixed cylinder 16. The fixed cylinder 16 is rotatably connected to the pretreatment cylinder 17 through the rotating port via a bearing. One end of the pretreatment cylinder 17 extends through into the interior of the insulation cylinder 6. A connecting clamp cylinder 18 is connected to one side of the box body 1. A feed pipe 19 is connected to the middle of one side of the connecting clamp cylinder 18. An air conveying mechanism is connected to one side of the inner wall of the connecting clamp cylinder 18. The inner wall of the pretreatment cylinder 17 is connected to a material guide plate 27. The material guide plate 27 is spirally arranged to guide the material and prevent the material from accumulating in one place for a long time. A screen 28 is circumferentially embedded on the outer wall of the pretreatment cylinder 17 corresponding to the interior of the fixed cylinder 16. A rotating mechanism is connected to one side of the inner wall of the fixed cylinder 16.

[0033] The support mechanism provides stable rotation and tilt setting for the drying drum 7, the heat insulation cylinder 6 forms a heat insulation layer to reduce heat loss, the material lifting plate is installed inside the drying drum 7 to enhance the contact between the material and the hot air, the discharge mechanism screens the crushed charcoal to ensure the quality of the finished product, and the exhaust mechanism purifies and recirculates the exhaust gas.

[0034] The pretreatment feeding mechanism collects fine materials through the fixed cylinder 16, introduces materials and gas through the connecting cylinder 18, establishes an inert atmosphere through the gas conveying mechanism, and achieves gentle and slow pre-drying through the spiral guide plate 27. The screen 28 is also spirally set in conjunction with the guide plate 27. The circumferential screen 28 separates wet fine powder to reduce dust load. The rotating mechanism drives the pretreatment cylinder 17 to rotate, and together they complete the preheating, inertization and pre-screening of materials such as semi-coke, solving the safety and loss problems of flammable and fragile materials from the source.

[0035] As shown in Figures 1-3: The support mechanism includes a support plate 2. The upper end of the support plate 2 is slightly inclined. When both the insulation cylinder 6 and the drying cylinder 7 are inclined, the carbon material to be dried slowly moves towards the discharge shell 11. One side of the support plate 2 is connected to one side of the inner wall of the box 1. Both sides of the upper end of the support plate 2 are connected to connecting frames 3. Both sides of the upper end of the two connecting frames 3 are rotatably connected to support rollers 4 to ensure the stability of the rolling of the stabilizing ring 5. The two support rollers 4 on the upper end of one connecting frame 3 and the two support rollers 4 on the upper end of the other connecting frame 3 are rotatably connected to the stabilizing ring 5. The inner wall of the stabilizing ring 5 is connected to both sides of the outer wall of the insulation cylinder 6. One side of the upper end of the support plate 2 is connected to a drive motor 8. The output end of the drive motor 8 is connected to a drive gear 9. The outer wall of the insulation cylinder 6 is connected to a drive gear ring 10 corresponding to the drive gear 9. One side of the drive gear 9 is meshed with the drive gear ring 10.

[0036] The support mechanism enables stable driving of the drying cylinder 7 and axial conveying of materials. The inclined design of the upper part of the support plate 2 provides a clear flow direction for the materials. The symmetrically arranged support rollers 4 and the stabilizing ring 5 form a low-friction rolling support, ensuring that the drying cylinder 7 rotates smoothly. The drive motor 8 provides stable torque through the drive gear 9 and the drive gear ring 10, driving the entire drying cylinder 7 to rotate at a set speed. Its inclined rotational motion causes the internal lifting plates to periodically lift and throw materials, achieving uniform drying while continuously pushing the materials to move axially towards the discharge end.

[0037] As shown in Figures 1-4: The discharge mechanism includes a discharge housing 11, one side of which is connected to one side of the housing 1. A discharge pipe 12 is connected to the lower end of the discharge housing 11. The end of the drying cylinder 7 is located above the discharge pipe 13. When the material is conveyed to the very end of the drying cylinder 7, it falls directly into the discharge pipe 13. The other side of the lower end of the discharge housing 11 is connected to the discharge pipe 13. Discharge valves are connected to the outer walls of both the discharge pipe 12 and the discharge pipe 13. One end of the drying cylinder 7 extends through the discharge housing 11 into its interior. One side of the discharge housing 11 corresponds to the drying cylinder... An opening is provided at the drying cylinder 7 to facilitate the rotation of the drying cylinder 7. The drying cylinder 7 is located inside the opening. Circumferential ash filter holes 14 are provided on the outer wall of the drying cylinder 7 above the ash discharge pipe 12. When the carbon material is rotating inside the drying cylinder 7, the charcoal fragments can fall directly through the ash filter holes 14 to the ash discharge pipe 12. An air inlet pipe 15 is connected to the middle of one side of the discharge shell 11. An air inlet valve is connected to one side of the outer wall of the air inlet pipe 15. The air inlet pipe 15 is directly connected to an external hot air blower, which can inject hot air into the drying cylinder 7 to achieve rapid drying of the carbon material.

[0038] The end of the drying cylinder 7 extends into the discharge shell 11 to achieve sealed transfer of materials and prevent dust from escaping. The ash filter hole 14 is designed to be aligned with the ash discharge pipe 12. The circumferential ash filter hole 14 continuously screens and discharges dried debris when the drying cylinder 7 rotates, ensuring the purity of the finished carbon material particles. The air inlet pipe 15 serves as the main hot air inlet, directly injecting high-temperature, low-oxygen gas into the discharge end of the drying cylinder 7 to form a co-current drying main airflow. The discharge pipe 13 and the ash discharge pipe 12 are independently controlled by valves to achieve separate collection of finished products and waste, facilitating subsequent processing.

[0039] As shown in Figures 3-6: One end of the pretreatment cylinder 17 is located inside the fixed cylinder 16, and one end of the connecting clamp cylinder 18 passes through the box body 1 and the pretreatment cylinder 17 in sequence and extends into the pretreatment cylinder 17. The connecting clamp cylinder 18 can fix the feed pipe 19, and the connecting clamp cylinder 18 is directly inserted into the pretreatment cylinder 17 to realize the delivery of both materials and gas into the pretreatment cylinder 17. A guide ring is connected to one side of the outer wall of the connecting clamp cylinder 18. The cross-sectional shape of the guide ring is inclined. One end of the feed pipe 19 extends through the connecting clamp cylinder 18. The lower end of the feed pipe 19 is inclined, and the other end of the feed pipe 19 is funnel-shaped.

[0040] The trumpet-shaped feed pipe 19 facilitates the smooth feeding of wet carbon materials. The inclined feed pipe 19 guides the material to fall into the pretreatment cylinder 17 along the set path to prevent material blockage. The connecting clamp cylinder 18 serves as a support for the feed pipe 19 and also forms a common channel for the material and protective gas, ensuring that both enter the pretreatment cylinder 17 at the same time, providing a foundation for subsequent preheating, inerting and screening processes.

[0041] As shown in Figure 5: The air conveying mechanism includes a material conveying ring pipe 20, which is located inside the connecting cylinder 18. One side of the material conveying ring pipe 20 is connected to one side of the inner wall of the connecting cylinder 18 through an installation block. The connecting cylinder 18 is fitted with one side of the outer wall of the feed pipe 19. One side of the material conveying ring pipe 20 is circumferentially connected with a conveying pipe 21. Filter blocks are embedded on one side of the inner wall of multiple conveying pipes 21 to prevent dust from entering the conveying pipes 21. An air conveying pipe 22 is connected to the middle of the upper end of the material conveying ring pipe 20. The upper end of the air conveying pipe 22 passes through the upper end of the connecting cylinder 18 in sequence. An air conveying valve is connected to the upper part of the outer wall of the air conveying pipe 22.

[0042] The gas conveying mechanism achieves uniform distribution of safety protection gas and dustproof conveying. The conveying ring pipe 20 diverts the gas from the gas conveying pipe 22 to each conveying pipe 21. The conveying pipe 21 sprays the gas evenly into the feeding area of ​​the pretreatment cylinder 17 in the form of multiple jets. The filter block embedded in the conveying pipe 21 can prevent the backflow of fine powder from clogging the gas path and ensure the long-term stability of gas conveying. The gas conveying valve is used to adjust or cut off the gas source, which facilitates system debugging and maintenance.

[0043] As shown in Figures 6-8: The rotating mechanism includes a slip ring 23. The outer wall of the slip ring 23 is connected to one side of the inner wall of the fixed cylinder 16. A groove is provided in the middle of the inner wall of the slip ring 23. Slider 24 is connected to the upper and lower parts of the outer wall of the pretreatment cylinder 17 corresponding to the groove. The two sliders 24 slide inside the groove. A rotary motor 25 is connected to the upper part of the inner wall of the pretreatment cylinder 17 corresponding to the slip ring 23. The upper end of the rotary motor 25 is connected to the upper end of the inner wall of the fixed cylinder 16 through a mounting plate. A rotary gear 26 is connected to the outer wall of the output end of the rotary motor 25. A rotary gear ring 37 is connected to the outer wall of the pretreatment cylinder 17 below the rotary gear 26. The lower end of the rotary gear 26 meshes with the rotary gear ring 37. A discharge port 29 is provided in the middle of the lower end of the fixed cylinder 16. A receiving box 30 is connected to the lower end of the inner wall of the box 1 below the discharge port 29.

[0044] The rotary motor 25 drives the pretreatment cylinder 17 to rotate via gear and ring drive. Its speed and direction can be set independently of the main drying cylinder to meet the requirements of the "gentle and slow" pretreatment process. The sliding pair formed by the slider 24 and the slip ring 23 not only restricts the radial runout of the pretreatment cylinder, but also allows its axial slight floating, ensuring smooth rotation and adapting to thermal expansion and contraction. The screened wet fine powder falls into the collection box 30 through the discharge port 29 for centralized recycling, realizing the closed collection and cleaning of waste materials.

[0045] As shown in Figures 1-4: The exhaust mechanism includes an exhaust pipe 31. The lower end of the exhaust pipe 31 is connected to one side of the upper end of the discharge housing 11. The upper end of the exhaust pipe 31 is connected to a dust removal device 32, which is a bag filter to reduce the dust inside the exhaust gas. A support plate is connected to one side of the dust removal device 32. An air pump 33 is connected to the upper end of the support plate. An exhaust pipe is also provided at the output end of the air pump 33, which can be directly exhausted after pretreatment. The input end of the air pump 33 is connected to one side of the dust removal device 32. The output end of the air pump 33 is connected to a mixing cylinder 34. An air inlet pipe 35 is connected to one side of the upper end of the mixing cylinder 34. The air inlet pipe 35 is used to input a small amount of nitrogen into the mixing cylinder 34, which greatly reduces the oxygen content inside the gas. A connecting pipe 36 is connected to one end of the mixing cylinder 34. One end of the connecting pipe 36 is connected to the upper end of the gas delivery pipe 22.

[0046] The exhaust pipe 31 collects the dust-laden exhaust gas from the device, the dust removal equipment 32 efficiently removes dust to ensure gas cleanliness, the air pump 33 provides stable negative pressure and drives gas circulation, the mixing cylinder 34 mixes nitrogen through the air inlet pipe 35 to precisely adjust the oxygen content of the circulating gas and create a safe inert atmosphere at the pretreatment feeding mechanism, the connecting pipe 36 sends the conditioned gas back to the pretreatment gas conveying mechanism to realize the recycling of exhaust gas heat energy and safe atmosphere, and the independent exhaust pipe can directly discharge the purified gas under specific working conditions.

[0047] It should be noted that the specific circuit connections and control methods of the actuators such as the drive motor 8, rotary motor 25, and air pump 33 involved in the embodiments of the present invention, as well as the selection and parameter adjustment methods of the dust removal equipment 32, valves, and other supporting components, all adopt conventional automatic control technology in the field and belong to the scope of existing technology, and will not be described in detail here.

[0048] Working principle: When using the device, first turn on the drive motor 8, the rotary motor 25 and the air pump 33. The high temperature and low oxygen mixed gas prepared externally is continuously injected into the discharge shell 11 through the air inlet pipe 15.

[0049] Most of the low-oxygen hot air enters the discharge end of the drying cylinder 7 from the discharge shell 11 and flows along the drying cylinder 7 towards the feed end, uniformly preheating the entire drying cylinder 7 and its internal lifting plates to prevent subsequent cold and wet materials from causing condensation and sticking to the cylinder wall.

[0050] Under the suction of the air pump 33, the exhaust gas after heat exchange in the drying cylinder 7, as well as the gas that may flow out from the pretreatment cylinder 17 area, are drawn into the exhaust pipe 31 and then into the dust removal equipment 32 for purification. The purified clean gas enters the mixing cylinder 34. Since the inlet pipe 35 can supplement nitrogen as needed to further reduce the oxygen content of the gas, the gas with a low oxygen content is then injected into the feed end of the pretreatment cylinder 17 through the connecting pipe 36 and the gas conveying pipe 22, and finally through the multiple conveying pipes 21 circumferentially connected to the conveying ring pipe 20. This provides a stable, safe, and low-oxygen starting environment inside the pretreatment cylinder 17.

[0051] Wet semi-coke is fed into the pretreatment cylinder 17 through the feed pipe 19. Driven by the rotary motor 25, the pretreatment cylinder 17 meshes with the rotary gear ring 37 through the rotary gear 26 and begins to rotate at a low speed. The rotation direction of the pretreatment cylinder 17 is opposite to that of the drying cylinder 7. The spiral guide plate 27 inside the pretreatment cylinder 17 gently conveys the material towards the drying cylinder 7 and continuously turns it over. Low-oxygen gas injected from the conveying pipe 21 gently heats the material. This process is carried out in an oxygen-deficient environment, so that the volatiles in the semi-coke cannot burn due to lack of oxygen when they reach the precipitation temperature, thus reducing the risk of deflagration at the feed end.

[0052] During the process of turning and conveying the material, the original wet fine particles and those generated by gentle collisions are screened out through the screen 28 embedded in the pretreatment cylinder 17 and fall into the bottom of the fixed cylinder 16. They are then collected in the receiving box 30 through the discharge port 29. The fragile and difficult-to-dry fine powders are separated in advance before the material enters the main drying process, which greatly reduces the waste of heat energy in the subsequent drying process.

[0053] The pretreated carbon material enters the drying cylinder 7 from the end of the pretreatment cylinder 17. The drying cylinder 7 is driven by the drive motor 8 and rotates through the meshing transmission of the drive gear 9 and the drive gear ring 10. The two stabilizing rings 5 ​​rotate at a constant speed under the support of the support rollers 4. At this time, the main part of the high temperature and low oxygen hot air injected from the air inlet pipe 15 moves in the same direction as the material. The material is repeatedly lifted and sprinkled by the lifting plates inside the cylinder, and undergoes intense heat exchange with the high temperature hot air, and the moisture is quickly and deeply removed.

[0054] A small amount of dried debris generated during the drying process is screened out through multiple ash filter holes 14 when the material moves to the end of the drying cylinder 7, and falls into the ash discharge pipe 12 for discharge, ensuring the cleanliness of the finished carbon material.

[0055] During stable drying operation, the dust-laden hot and humid exhaust gas generated in the drying drum 7 and the exhaust gas discharged from the pretreatment section are drawn into the dust removal equipment 32 under negative pressure. The dust removal equipment 32 purifies the gas. Under continuous feeding conditions, most of the purified gas enters the mixing drum 34. At this time, the temperature of this circulating exhaust gas is still relatively high, and the oxygen content changes due to combustion. Nitrogen is precisely added into the mixing drum 34 through the inlet pipe 35 to dynamically adjust its oxygen content. It is then recycled as a protective gas for the pretreatment section, which improves the utilization rate of thermal energy.

[0056] After the feeding stops, the purified gas inside the dust removal equipment 32 is discharged through another exhaust pipe of the air pump 33, and the purified gas is directly discharged to the subsequent processing equipment.

[0057] Simultaneously, the dried carbon material that meets the moisture requirements falls from the end of the drying cylinder 7 into the discharge pipe 13 and is discharged through the discharge pipe 13.

[0058] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A dustproof calcium carbide furnace carbon material drying device, comprising a housing (1), characterized in that, A support mechanism is connected to the lower part of one side of the inner wall of the box (1). A heat preservation cylinder (6) is set above the support mechanism. A drying cylinder (7) is connected to the inner wall of the heat preservation cylinder (6). A discharge mechanism is connected to one side of the box (1) through a connecting block. An exhaust mechanism is connected to the upper side of the discharge mechanism. A pretreatment feeding mechanism is connected to one side of the inside of the box (1). The pretreatment feeding mechanism includes a fixed cylinder (16). One side of the fixed cylinder (16) is connected to one side of the inner wall of the box (1). A rotating port is opened on one side of the fixed cylinder (16). The fixed cylinder (16) rotates accordingly. A pretreatment cylinder (17) is rotatably connected to the moving port via a bearing. One end of the pretreatment cylinder (17) extends through into the interior of the insulation cylinder (6). A connecting sleeve (18) is connected to one side of the box body (1). A feed pipe (19) is connected to the middle of one side of the connecting sleeve (18). An air supply mechanism is connected to one side of the inner wall of the connecting sleeve (18). A guide plate (27) is connected to the inner wall of the pretreatment cylinder (17). The guide plate (27) is spirally arranged. A screen (2) is circumferentially embedded in the outer wall of the pretreatment cylinder (17) corresponding to the interior of the fixed cylinder (16). 8) A rotating mechanism is connected to one side of the inner wall of the fixed cylinder (16). The rotating mechanism includes a rotating motor (25), a rotating gear (26), and a rotating gear ring (37). The rotating motor (25) drives the pretreatment cylinder (17) to rotate through the rotating gear (26) and the rotating gear ring (37). Its rotation speed and direction of rotation are set independently of the drying cylinder (7) to meet the requirements of the gentle and slow pretreatment process. The air conveying mechanism includes a material conveying ring pipe (20). The material conveying ring pipe (20) is located inside the connecting clamp cylinder (18). One side of the material conveying ring pipe (20) is connected to the mounting block. The connecting cylinder (18) is connected to one side of the inner wall of the connecting cylinder (18), and the connecting cylinder (18) is sleeved on one side of the outer wall of the feed pipe (19). The conveying ring pipe (20) is circumferentially connected to one side of the conveying pipe (21). The conveying pipe (21) sprays gas into the feeding area of ​​the pretreatment cylinder (17) in the form of multiple jets. Filter blocks are embedded on one side of the inner wall of multiple conveying pipes (21). The middle of the upper end of the conveying ring pipe (20) is connected to the gas conveying pipe (22). The upper end of the gas conveying pipe (22) passes through the upper end of the connecting cylinder (18) in sequence. The upper part of the outer wall of the gas conveying pipe (22) is connected to the gas conveying valve.The exhaust mechanism includes an exhaust pipe (31), the lower end of which is connected to one side of the upper end of the discharge housing (11). A dust removal device (32) is connected to the upper end of the exhaust pipe (31). A support plate is connected to one side of the dust removal device (32). An air pump (33) is connected to the upper end of the support plate. The input end of the air pump (33) is connected to one side of the dust removal device (32). The output end of the air pump (33) is connected to a mixing cylinder (34). An air inlet pipe (35) is connected to one side of the upper end of the mixing cylinder (34). The air inlet pipe (35) is used to input a small amount of nitrogen into the mixing cylinder (34). A connecting pipe (36) is connected to one end of the mixing cylinder (34). One end of the connecting pipe (36) is connected to the upper end of the gas delivery pipe (22).

2. The dustproof calcium carbide furnace carbon material drying device according to claim 1, characterized in that, The support mechanism includes a support plate (2), one side of which is connected to one side of the inner wall of the box (1). Both sides of the upper end of the support plate (2) are connected to connecting frames (3). Both sides of the upper end of the two connecting frames (3) are rotatably connected to rollers (4). The two rollers (4) at the upper end of one connecting frame (3) and the two rollers (4) at the upper end of the other connecting frame (3) are rotatably connected to a stabilizing ring (5). The inner wall of the stabilizing ring (5) is connected to both sides of the outer wall of the insulation cylinder (6).

3. The dustproof calcium carbide furnace carbon material drying device according to claim 2, characterized in that, The upper side of the support plate (2) is connected to a drive motor (8), and the output end of the drive motor (8) is connected to a drive gear (9). The outer wall of the heat preservation cylinder (6) is connected to a drive gear ring (10) corresponding to the drive gear (9). One side of the drive gear (9) is meshed with the drive gear ring (10).

4. The dustproof calcium carbide furnace carbon material drying device according to claim 1, characterized in that, The discharge mechanism includes a discharge housing (11), one side of which is connected to one side of the box body (1). A discharge pipe (12) is connected to one side of the lower end of the discharge housing (11), and a discharge pipe (13) is connected to the other side of the lower end of the discharge housing (11). Discharge valves are connected to the outer walls of the discharge pipe (12) and the discharge pipe (13). One end of the drying cylinder (7) extends through into the interior of the discharge housing (11). An opening is provided on one side of the discharge housing (11) corresponding to the location of the drying cylinder (7). The drying cylinder (7) is located inside the opening. Filter holes (14) are provided circumferentially on the outer wall of the drying cylinder (7) above the discharge pipe (12). An air inlet pipe (15) is connected to the middle of one side of the discharge housing (11), and an air inlet valve is connected to one side of the outer wall of the air inlet pipe (15).

5. The dustproof calcium carbide furnace carbon material drying device according to claim 1, characterized in that, One end of the pretreatment cylinder (17) is located inside the fixed cylinder (16). One end of the connecting cylinder (18) passes through the box body (1) and the pretreatment cylinder (17) in sequence and extends into the pretreatment cylinder (17). A guide ring is connected to one side of the outer wall of the connecting cylinder (18). The cross-sectional shape of the guide ring is inclined. One end of the feed pipe (19) extends into the connecting cylinder (18). The lower end of the feed pipe (19) is inclined. The other end of the feed pipe (19) is trumpet-shaped.

6. The dustproof calcium carbide furnace carbon drying device according to claim 1, characterized in that, The fixed cylinder (16) has a discharge port (29) at the middle of its lower end, and a receiving box (30) is connected to the lower end of the inner wall of the box body (1) below the discharge port (29).

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