Zinc sulfide production process and drying equipment for production

Abstract

The invention discloses a zinc sulfide production process and drying equipment for production, and relates to the technical field of zinc sulfide production, the zinc sulfide production process comprises a drying machine shell, a treatment mechanism is arranged in the drying machine shell, the treatment mechanism comprises a stirring assembly and a rotary drum assembly, and the stirring assembly comprises a stirring base rod; a plurality of stirring supporting rods are arranged on the side surface of the stirring base rod, a movable triggering top block is arranged on the surface of one side of each stirring supporting rod, and an elastic block is arranged on the surface of the side, close to the corresponding stirring supporting rod, of each triggering top block; according to the scheme, by arranging the stirring assembly and the rotary drum assembly, crushing can be conducted when large filter cakes are encountered in the stirring process, the crushing degree of materials is improved, the drying speed is increased, and the drying quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of zinc sulfide production, in particular to a zinc sulfide production process and drying equipment for production. Background Art

[0002] The drying equipment used in zinc sulfide production, especially the rotary flash dryer, is a type of equipment widely used in many industries such as chemical, pharmaceutical, building materials and food. This type of equipment is specially designed for processing granular, powdery, paste and filter cake pseudo-agglomerated materials. It has the significant advantages of small footprint, low energy consumption, high thermal efficiency and continuous large-scale production.

[0003] In the production process of zinc sulfide, traditional drying equipment still has some inconveniences. Traditional drying equipment usually adopts a single stirring and heating method. The heat source to which the material is subjected during the drying process is generally heated from one side of the carrier drum in which it is loaded. During the drying process, it is easy for the temperatures on both sides of the carrier drum to be different. The temperature on the side close to the heat source is generally higher, while the temperature on the other side is different because it is far away from the heat source. This will affect the drying effect of the internal material, causing local overheating or insufficient drying. When the material is broken by the stirring blades in the carrier drum, because the zinc sulfide filter cake will produce a certain viscosity after heating, it is easy to stick to the surface of the stirring blade during the stirring process, resulting in a decrease in the overall crushing efficiency of the equipment, and the crushing effect of the stuck stirring blade will also decrease. The size and thickness of the filter cake are generally different. When facing some larger and thicker filter cakes, they cannot be broken well, resulting in the failure of the internal part to receive a good drying effect, which affects the overall drying effect of the material. Summary of the invention

[0004] The object of the present invention is to provide a zinc sulfide production process and a drying device for production, so as to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution, a zinc sulfide production process and a drying device for production, comprising: A dryer housing, wherein a processing mechanism is disposed inside the dryer housing, and the processing mechanism includes a stirring assembly and a drum assembly; The stirring assembly comprises: a stirring base rod, a plurality of stirring support rods are arranged on the side surface of the stirring base rod, a movable triggering top block is arranged on one side surface of the stirring support rod, an elastic block is arranged on one side surface of the triggering top block close to the stirring support rod, two sides of the elastic block are respectively connected to the stirring support rod and one side surface of the triggering top block, movable tearing side plates are arranged on the upper and lower sides of the triggering top block, an insertion groove is further arranged between the tearing side plate and the triggering top block, and a top position protrusion matched with the insertion groove is arranged on one side surface of the stirring support rod close to the tearing side plate; The rotary drum assembly includes: an inner drum body, the inner drum body is located inside the heating chamber, a plurality of air flow rings are arranged on the surface of the inner drum body, a sliding ring is arranged at the top of the inner drum body, a limiting slideway matched with the sliding ring is arranged on the inner side wall of the dryer shell, and a ventilation mesh is arranged on the bottom surface of the inner drum body.

[0006] Furthermore, a limiting slider is provided on one side surface of the tearing side plate close to the triggering top block to improve the stability of the tearing side plate when sliding and to prevent the tearing side plate from being completely separated from the triggering top block. A limiting spring is also provided between one end of the limiting slider and the triggering top block.

[0007] Furthermore, a fixed tooth is provided on the surface of one end of the trigger top block, and hidden grooves are provided on the upper and lower surfaces of the trigger top block. An elastic connecting plate is provided on the surface of the hidden groove, and a material removing wiper block is provided on the end of the elastic connecting plate facing away from the hidden groove. A top plate protrusion matching with the elastic connecting plate is also provided inside the hidden groove, and a slideway inner groove for facilitating the sliding of the material removing wiper block is provided on the side surface of the tearing side plate close to the hidden groove, and limiting convex piles are provided on both sides of the material removing wiper block. Limiting slide grooves matching with the limiting convex piles are also provided on the inner side surfaces of the slideway inner groove.

[0008] Furthermore, a positioning groove is provided on the bottom surface of the inner cylinder, force grooves are provided on both sides of the positioning groove, a rotatable rotating shaft is provided at the center of the positioning groove, the upper surface of the rotating shaft is fixedly connected to the bottom surface of the stirring base rod, the surface of the rotating shaft is also provided with an annular hoop matching the positioning groove, elastic telescopic blocks are provided on both side surfaces of the annular hoop, and a clamping block matching the force groove is provided at the end of the elastic telescopic block.

[0009] Furthermore, the processing mechanism also includes a driving component, which includes: a driven wheel, the top surface of the driven wheel is fixedly connected to the bottom surface of the rotating shaft, and a shaft sleeve is also provided on the outside of the rotating shaft, and the shaft sleeve can drive the rotating shaft to rise and fall in a small range, a driving motor is provided on one side surface of the driven wheel, and a sliding mounting plate is provided on one side surface of the driving motor, and the sliding mounting plate is slidably connected to the bottom support frame under the dryer shell, a main rotating wheel is provided at the end of the output shaft of the driving motor, and a transmission belt is connected between the main rotating wheel and the driven wheel, a small motor is provided on the bottom surface of the bottom support frame, and a threaded rod is provided on the output end of the small motor, and a lifting plate is fixedly installed between the shaft sleeve at the bottom of the bottom support frame and the sliding mounting plate, and a threaded hole matching the threaded rod is opened at the center of the lifting plate.

[0010] Furthermore, the processing mechanism also includes: a feeding component, the feeding component includes: a feeding pipe, a clamping block matching the feeding pipe is opened inside the dryer shell, a feeding port is set on the surface of the feeding pipe, an air outlet plate is set at the center of the feeding port, the air outlet plate is a hollow structure and an air outlet is opened on the bottom surface, and an air duct is connected between the upper surface of the air outlet plate and the drying box body.

[0011] Furthermore, a bottom support frame is provided on the bottom surface of the dryer shell, an exhaust fan is provided on one side surface of the dryer shell, an air outlet is provided at one end of the exhaust fan, a heating barrel is provided on one side of the air outlet, a drying box is provided on the side surface of the heating barrel facing away from the exhaust fan, the drying box is sleeved on the surface of the dryer shell, a main classifier is also provided on one side of the dryer shell, a discharge port begins to be provided on the side surface of the dryer shell close to the main classifier, a cyclone separator body is provided on one side surface of the discharge port, a fixed base frame is provided on the bottom surface of the cyclone separator body, an auxiliary fan is provided on one side of the fixed base frame, and an exhaust pipe is provided above the auxiliary fan, wherein the cyclone separator body, the main classifier and the discharge port are all connected by a transmission pipe, and the auxiliary fan and the cyclone separator body are connected by an air outlet pipe.

[0012] A drying device for zinc sulfide production comprises the following steps: S1: There are two synthetic routes for zinc sulfide: one is to use hydrogen sulfide tail gas as raw material, and react with zinc acetate to produce zinc sulfide by double decomposition reaction. The by-product acetic acid is used to produce sodium acetate with zinc oxide; the other is to use sodium sulfide and zinc acetate to produce zinc sulfide by double decomposition reaction. Sodium acetate can be concentrated by membrane separation equipment and sold as a by-product.

[0013] S2: When preparing zinc acetate, a certain amount of water is added to the zinc acetate synthesis kettle, and zinc oxide is fed into the kettle through a mechanical fully enclosed automatic feeder. After sufficient stirring, fresh acetic acid or acetic acid filtrate is added. After stirring and reacting for a period of time, the mixture is pumped into a filter press to remove particles and impurities. The zinc acetate solution is transferred to a zinc sulfide synthesis kettle for standby use.

[0014] S3: Zinc sulfide synthesis route 1: Hydrogen sulfide is introduced into the zinc sulfide synthesis kettle to start the reaction at room temperature to produce nano zinc sulfide.

[0015] S4: Zinc sulfide synthesis route 2: Add a certain amount of water into the sodium sulfide slurry kettle, add sodium sulfide and start stirring for slurrying, transfer to the filter press to remove insoluble particles and impurities, transfer the sodium sulfide liquid into the zinc sulfide synthesis kettle, and react at room temperature to produce nano zinc sulfide.

[0016] S5: Zinc sulfide purification: The material in the reactor is transferred to a closed filter press for filtration. The filtrate is acetic acid (sodium). The filter cake is washed with water once, and the washing liquid is pumped into the filtrate tank for reuse. The filter cake is sent to a flash dryer for drying. After crushing, it is placed in a calcining furnace for high-temperature calcination to change its nanostructure. Subsequently, the nano zinc sulfide solid is placed in a disperser and water is added to disperse it into slurry. The slurry is transferred to a plate and frame filter press for filtration. The filtrate is reused in the dispersion process. The filter cake is washed with water and sent to a flash dryer for secondary drying. After crushing, the nano zinc sulfide product is obtained.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. In this scheme, a stirring assembly is provided to continuously stir and mix the materials through the rotation of the stirring base rod and the stirring support rod to ensure that the materials can be heated evenly. The trigger top block and the tearing side plate on the stirring support rod can crush the larger filter cake when encountering it during the stirring process, which effectively improves the crushing degree of the material and makes the material more delicate, which helps to speed up the drying speed and improve the drying quality. The hidden groove, the elastic connecting plate and the material removal wiper can automatically clean the residual material on the trigger top block and the tearing side plate during the stirring process to prevent the accumulation of materials from affecting the stirring effect.

[0018] 2. In this scheme, a rotary drum assembly is provided, which can rotate in the dryer housing through a sliding ring and a limiting slideway. Under the drive of the driving assembly, the inner drum can rotate once at a fixed time to adjust the positions of both sides, thereby ensuring the uniformity of the material during the drying process and avoiding the uneven drying caused by material accumulation or fixed position. A plurality of air flow rings are provided on the surface of the inner drum in the rotary drum assembly, which helps to evenly distribute the hot air in the drum, thereby improving the utilization rate and drying efficiency of the hot air. At the same time, the ventilation mesh plate can enable the hot air to smoothly enter the inner drum when in use, and fully exchange heat with the material; 3. In this scheme, a driving assembly is provided, and the main rotating wheel is driven to rotate by a driving motor, and then connected to the driven wheel through a transmission belt, thereby driving the rotating shaft and the stirring base rod to rotate, ensuring the normal operation of the equipment and the smooth progress of the drying process. The small motor in the driving assembly adjusts the height of the sliding mounting plate through the threaded rod and the lifting plate, thereby realizing the timed rotation of the drum assembly, ensuring the uniformity of the material during the drying process, and also improving the degree of automation and drying efficiency of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a rear view structural schematic diagram of the present invention; Figure 3 It is a schematic diagram of the internal structure of the drying box of the present invention; Figure 4 It is a schematic diagram of the internal structure of the dryer housing of the present invention; Figure 5 It is a schematic diagram of the inner cylinder structure of the present invention; Figure 6 It is a schematic diagram of the stirring support rod structure of the present invention; Figure 7 It is a schematic diagram of the internal structure of the stirring assembly of the present invention; Figure 8 It is a schematic diagram of the bottom structure of the inner cylinder of the present invention.

[0020] In the figure: 1. dryer housing; 2. exhaust fan; 3. heating barrel; 4. drying box; 5. bottom support frame; 6. main classifier; 7. transmission pipe; 8. discharge port; 9. cyclone separator body; 10. air outlet pipe; 11. rotating shaft; 12. driven wheel; 13. lifting plate; 14. small motor; 15. driving motor; 16. exhaust pipe; 17. auxiliary fan; 18. fixed bottom frame; 19. feeding pipe; 20. feeding port; 21. air outlet plate; 22. transmission belt; 23. air duct; 24. heating chamber; 25. Clamping block; 26. Inner cylinder; 27. Limiting slideway; 28. Air flow ring; 29. ​​Sliding ring; 30. Stirring base rod; 31. Stirring support rod; 32. Triggering top block; 33. Tearing side plate; 34. Fixed tooth; 35. Insertion groove; 36. Elastic block; 37. Top position protrusion; 38. Limiting slider; 39. Elastic connecting plate; 40. Material removal wiper block; 41. Hidden groove; 42. Top plate protrusion; 43. Inner groove of slideway; 44. Ventilation mesh plate; 45. Adjustment groove; 46. Annular hoop; 47. Elastic telescopic block. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Example 1: Please refer to Figures 1 to 8 , a zinc sulfide production process and drying equipment for production, comprising: A dryer housing 1 is provided with a bottom support frame 5 on the bottom surface of the dryer housing 1, an exhaust fan 2 is provided on one side surface of the dryer housing 1, an air outlet is provided at one end of the exhaust fan 2, a heating barrel 3 is provided on one side of the air outlet, a drying box 4 is provided on the side surface of the heating barrel 3 away from the exhaust fan 2, the drying box 4 is sleeved on the surface of the dryer housing 1, a main classifier 6 is also provided on one side of the dryer housing 1, and a discharge port 8 is provided on the side surface of the dryer housing 1 close to the main classifier 6, and one side of the discharge port 8 is provided. A cyclone separator body 9 is provided on the side surface, a fixed base frame 18 is provided on the bottom surface of the cyclone separator body 9, an auxiliary fan 17 is provided on one side of the fixed base frame 18, and an exhaust pipe 16 is provided above the auxiliary fan 17, wherein the cyclone separator body 9, the main classifier 6 and the discharge port 8 are all connected through a transmission pipe 7, and the auxiliary fan 17 and the cyclone separator body 9 are connected through an outlet pipe 10, and a processing mechanism is provided inside the dryer housing 1, and the processing mechanism includes a stirring assembly and a drum assembly; When in use, the material (zinc sulfide filter cake) is put into the dryer housing 1 by the staff. At this time, the exhaust fan 2 starts to work, extracts the heated hot air from the heating barrel 3, and sends the hot air into the drying box 4. The drying box 4 is tightly sleeved on the outside of the dryer housing 1 to ensure that the hot air can fully contact with the material inside the dryer housing 1, so as to achieve an efficient drying effect. Inside the dryer housing 1, the stirring component of the processing mechanism continuously stirs and mixes the material through its stirring base rod and stirring support rod to ensure that the material can be evenly heated to avoid local overheating or uneven drying. The drum assembly enables the hot air to form a rotating airflow field inside the dryer housing 1, which is conducive to full contact and heat exchange between the hot air and the material. , so that the contact area between the material particles is increased, the heat exchange efficiency is further improved, and the drying speed is also accelerated. When the materials reach the predetermined drying degree, they will be discharged from the dryer shell 1 through the discharge port 8. At this time, the materials will enter the main classifier 6 for preliminary classification. The main classifier 6 divides the materials into different grades according to their particle size and density. The classified materials will be sent to the cyclone separator body 9 through the transmission pipe 7 for further separation and purification. The cyclone separator body 9 uses centrifugal force to separate the fine particles and dust in the materials, and send them to the auxiliary fan 17 through the outlet pipe 10. The auxiliary fan 17 generates a strong suction force to discharge these fine particles and dust to the outside of the equipment through the exhaust pipe 16, so as to ensure the purity and quality of the final product.

[0023] The stirring assembly includes: a stirring base rod 30, a plurality of stirring support rods 31 are arranged on the side surface of the stirring base rod 30, a movable trigger top block 32 is arranged on one side surface of the stirring support rod 31, an elastic block 36 is arranged on the side surface of the trigger top block 32 close to the stirring support rod 31, and the two sides of the elastic block 36 are respectively connected to the stirring support rod 31 and the side surface of the trigger top block 32, and the upper and lower sides of the trigger top block 32 are provided with movable tear side plates 33, and the side surface of the tear side plate 33 close to the trigger top block 32 is also provided with a limiting slider 38 that is convenient for improving the stability of the tear side plate 33 when sliding and preventing the tear side plate 33 from completely separating from the trigger top block 32, and a limiting spring is also arranged between one end of the limiting slider 38 and the trigger top block 32, and a limiting spring is arranged between the tear side plate 33 and the trigger top block 32. An insertion groove 35 is also provided, and a top position protrusion 37 matching with the insertion groove 35 is provided on a side surface of the stirring support rod 31 close to the tearing side plate 33, and a fixing tooth 34 is provided on one end surface of the triggering top block 32. Hidden grooves 41 are provided on the upper and lower surfaces of the triggering top block 32, and an elastic connecting plate 39 is provided on the surface of the hidden groove 41. A material removal wiper 40 is provided at one end of the elastic connecting plate 39 away from the hidden groove 41, and a top plate protrusion 42 matching with the elastic connecting plate 39 is provided inside the hidden groove 41. A slideway inner groove 43 for facilitating the sliding of the material removal wiper 40 is provided on one side surface of the tearing side plate 33 close to the hidden groove 41, and limiting convex piles are provided on both sides of the material removal wiper 40, and limiting slide grooves matching with the limiting convex piles are also provided on the inner two side surfaces of the slideway inner groove 43; The stirring assembly drives the plurality of stirring support rods 31 to rotate through the stirring base rod 30, thereby breaking the filter cake material in the dryer housing 1. However, the size of the filter cake is not fixed. Thicker filter cakes contain more liquid. During the drying process, the thickness of the thicker filter cakes will affect the drying effect. The trigger top block 32 and the tearing side plate 33 on the stirring support rod 31 will break the larger filter cakes when they encounter the material block during the stirring process. When the trigger top block 32 contacts the material block, the trigger top block 32 will penetrate into the larger filter cake. The fixed teeth 34 at the ends of the tearing side plates 33 on both sides can temporarily fix the filter cake on its surface. After receiving the impact force of the filter cake, the block 32 will move to one side and drive the tearing side plate 33 to move synchronously. In the process of triggering the movement of the top block 32, the insertion groove 35 on the side of the tearing side plate 33 gradually contacts the top protrusion 37, and as the top protrusion 37 is inserted into the insertion groove 35, the tearing side plates 33 on both sides move to both sides respectively, and the filter cake stuck at the end of the triggering top block 32 is torn from between. The larger the filter cake in contact, the greater the impact force received by the triggering top block 32, and the deeper the top protrusion 37 is inserted into the insertion groove 35, so that the tearing side plates 33 on both sides move with a larger amplitude, generating The stronger the tearing force, the stronger the tearing force. During the unfolding of the tear side panels 33 on both sides, the elastic connecting plates 39 and the material removing wipers 40 in the hidden grooves 41 are designed to clean the residual materials on the triggering top block 32 and the tear side panels 33 during the stirring process to prevent the accumulation of materials from affecting the stirring effect. When the tear side panels 33 are in the closed state, the elastic connecting plates 39 are pushed by the top plate protrusions 42 and remain in a bent state. The material removing wipers 40 do not reach the end of the tear side panels 33 due to the bending of the elastic connecting plates 39. When the tear side panels 33 are unfolded, as the elastic connecting plates 39 gradually lose the pushing effect of the top plate protrusions 42, Because of the elastic straightening, the material removing wiper block 40 slides inside the inner groove 43 of the slideway and reaches the end of the tearing side plate 33. The sliding speed of the material removing wiper block 40 is increased by utilizing the elasticity of the elastic connecting plate 39 when it is straightened, thereby generating a certain impact force, so that when the material removing wiper block 40 reaches the end of the tearing side plate 33, the torn filter cake stuck at the end of the tearing side plate 33 can be removed. Subsequently, the elastic block 36 is reset, and the limiting spring connected between the limiting slider 38 and the triggering top block 32 also begins to shrink, so that the tearing side plates 33 on both sides are retracted to the side surface of the triggering top block 32, waiting for the next filter cake tearing work.

[0024] The drum assembly comprises: an inner drum 26, the inner drum 26 is located inside the heating chamber 24, a plurality of air flow rings 28 are arranged on the surface of the inner drum 26, a sliding ring 29 is arranged at the top of the inner drum 26, a limiting slide 27 matched with the sliding ring 29 is arranged on the inner side wall of the dryer housing 1, a ventilation mesh plate 44 is arranged on the bottom surface of the inner drum 26, a positioning groove 45 is also provided on the bottom surface of the inner drum 26, force grooves are also provided on both sides of the positioning groove 45, a rotatable rotating shaft 11 is also arranged at the center of the positioning groove 45, the upper surface of the rotating shaft 11 is fixedly connected to the bottom surface of the stirring base rod 30, the surface of the rotating shaft 11 is also sleeved with an annular hoop 46 matched with the positioning groove 45, elastic telescopic blocks 47 are also arranged on the two side surfaces of the annular hoop 46, and the end of the elastic telescopic block 47 is provided with a clamping block 25 matched with the force groove; The inner cylinder 26 in the drum assembly is located in the heating chamber 24, and can stably rotate in the dryer housing 1 through the sliding ring 29 and the limiting slide 27. After a period of drying, the drum assembly will rotate once under the drive of the driving assembly to adjust the positions of both sides to ensure the uniformity of drying of the material in the inner cylinder 26. The multiple air flow rings 28 on the surface of the inner cylinder 26 help to evenly distribute the hot air in the cylinder, thereby improving the drying efficiency. The ventilation mesh plate 44 allows the hot air to pass through and enter the inner cylinder 26 and contact the material to achieve the purpose of drying. The rotating shaft 11 can rise under the control of the driving assembly and pass through the annular hoop 46 and the elastic The elastic telescopic block 47 cooperates with the adjustment groove 45 on the bottom surface of the inner cylinder 26, so that the stirring base rod 30 rotates with the inner cylinder 26 during the stirring process. Under the control of the driving component, the rotating shaft 11 drives the annular hoop 46 to rise, and the annular hoop 46 drives the engaging block 25 to enter the adjusting groove 45. After the engaging block 25 rotates to the position corresponding to the force groove, the elastic telescopic block 47 drives the engaging block 25 to extend and fit with the force groove, and then the inner cylinder 26 can be driven to rotate synchronously when the rotating shaft 11 rotates. After rotating to a certain amplitude, the driving motor drives the rotating shaft 11 to descend again, and the inner cylinder 26 stops rotating.

[0025] The processing mechanism also includes a driving component, which includes: a driven wheel 12, the top surface of the driven wheel 12 is fixedly connected to the bottom surface of the rotating shaft 11, and the rotating shaft 11 is also provided with an axial sleeve on the outside, which can drive the rotating shaft 11 to lift in a small range, a driving motor 15 is provided on one side surface of the driven wheel 12, and a sliding mounting plate is provided on one side surface of the driving motor 15, and the sliding mounting plate is slidably connected to the bottom support frame 5 below the dryer housing 1, and a main rotating wheel is provided at the end of the output shaft of the driving motor 15, and a transmission belt 22 is connected between the main rotating wheel and the driven wheel 12, a small motor 14 is provided on the bottom surface of the bottom support frame 5, and a threaded rod is provided on the output end of the small motor 14, and a lifting plate 13 is fixedly installed between the axial sleeve at the bottom of the bottom support frame 5 and the sliding mounting plate, and a threaded hole matching the threaded rod is opened at the center of the lifting plate 13; The driving assembly drives the main wheel to rotate through the driving motor 15, and the main wheel is connected to the driven wheel 12 through the transmission belt 22, thereby driving the rotating shaft 11 and the stirring base rod 30 to rotate. The shaft sleeve allows the rotating shaft 11 to be raised and lowered in a small range during the driving process to drive the drum assembly to rotate. The small motor 14 will periodically reciprocate the height of the sliding mounting plate through the threaded rod and the lifting plate 13, thereby causing the drum assembly to rotate once, ensuring that the internal drum assembly can maintain a uniform drying effect.

[0026] The processing mechanism also includes: a feeding assembly, which includes: a feeding pipe 19, a clamping block 25 matching the feeding pipe 19 is provided inside the dryer housing 1, a feeding port 20 is provided on the surface of the feeding pipe 19, an air outlet plate 21 is provided at the center of the feeding port 20, the air outlet plate 21 is a hollow structure and an air outlet is provided on the bottom surface, and an air duct 23 is connected between the upper surface of the air outlet plate 21 and the drying box 4; The feeding assembly introduces the material into the dryer casing 1 through the feeding pipe 19. The air outlet plate 21 at the center of the feeding port 20 is designed as a hollow structure with an air outlet on the bottom surface, which is connected to the air duct 23 between the drying box 4. During the feeding process, hot air is blown into the feeding pipe 19 through the air outlet of the air outlet plate 21 to preheat and preliminarily dry the material, which helps to smoothly proceed with the subsequent drying process. At the same time, the downward wind force generated by the air outlet plate 21 can also cause the material to shake slightly, which helps to prevent the material from being blocked or accumulated during the feeding process.

[0027] As a preferred implementation in this embodiment, please refer to Figures 1 to 8 As shown, the present invention also provides a zinc sulfide production process, comprising the following steps: S1: There are two synthetic routes for zinc sulfide: one is to use hydrogen sulfide tail gas as raw material, and react with zinc acetate to produce zinc sulfide by double decomposition reaction. The by-product acetic acid is used to produce sodium acetate with zinc oxide; the other is to use sodium sulfide and zinc acetate to produce zinc sulfide by double decomposition reaction. Sodium acetate can be concentrated by membrane separation equipment and sold as a by-product.

[0028] S2: When preparing zinc acetate, a certain amount of water is added to the zinc acetate synthesis kettle, and zinc oxide is fed into the kettle through a mechanical fully enclosed automatic feeder. After sufficient stirring, fresh acetic acid or acetic acid filtrate is added. After stirring and reacting for a period of time, the mixture is pumped into a filter press to remove particles and impurities. The zinc acetate solution is transferred to a zinc sulfide synthesis kettle for standby use.

[0029] S3: Zinc sulfide synthesis route 1: Hydrogen sulfide is introduced into the zinc sulfide synthesis kettle to start the reaction at room temperature to produce nano zinc sulfide.

[0030] S4: Zinc sulfide synthesis route 2: Add a certain amount of water into the sodium sulfide slurry kettle, add sodium sulfide and start stirring for slurrying, transfer to the filter press to remove insoluble particles and impurities, transfer the sodium sulfide liquid into the zinc sulfide synthesis kettle, and react at room temperature to produce nano zinc sulfide.

[0031] S5: Zinc sulfide purification: The material in the reactor is transferred to a closed filter press for filtration. The filtrate is acetic acid (sodium). The filter cake is washed with water once, and the washing liquid is pumped into the filtrate tank for reuse. The filter cake is sent to a flash dryer for drying. After crushing, it is placed in a calcining furnace for high-temperature calcination to change its nanostructure. Subsequently, the nano zinc sulfide solid is placed in a disperser and water is added to disperse it into slurry. The slurry is transferred to a plate and frame filter press for filtration. The filtrate is reused in the dispersion process. The filter cake is washed with water and sent to a flash dryer for secondary drying. After crushing, the nano zinc sulfide product is obtained.

[0032] S6: The reaction equation of zinc sulfide production process is:

[0033] The working principle of the present invention is: When in use, the material (zinc sulfide filter cake) is put into the dryer housing 1 by the staff, and the feeding component introduces the material into the dryer housing 1 through the feeding pipe 19. The air outlet plate 21 at the center of the feeding port 20 is designed as a hollow structure, and an air outlet is provided on the bottom surface, which is connected to the air duct 23 between the drying box 4. During the feeding process, hot air is blown into the feeding pipe 19 through the air outlet of the air outlet plate 21 to preheat and preliminarily dry the material, which is conducive to the smooth progress of the subsequent drying process. At the same time, the downward wind force generated by the air outlet plate 21 can also cause the material to shake slightly, which helps to prevent the material from being blocked or accumulated during the feeding process. Subsequently, the exhaust fan 2 starts to work, extracts the heated hot air from the heating barrel 3, and sends the hot air into the drying box 4. The drying box 4 is tightly mounted on the outside of the dryer housing 1 to ensure that the hot air can fully contact the material inside the dryer housing 1, thereby achieving an efficient drying effect. Inside the dryer housing 1, the stirring component of the processing mechanism continuously stirs and mixes the material through its stirring base rod and stirring support rod to ensure that the material can be evenly heated to avoid local overheating or uneven drying. The stirring assembly drives the plurality of stirring support rods 31 to rotate through the stirring base rod 30, thereby breaking the filter cake material in the dryer housing 1. However, the size of the filter cake is not fixed. Thicker filter cakes contain more liquid. During the drying process, the thickness of the thicker filter cakes will affect the drying effect. The trigger top block 32 and the tearing side plate 33 on the stirring support rod 31 will break the larger filter cakes when they encounter the material block during the stirring process. When the trigger top block 32 contacts the material block, the trigger top block 32 will penetrate into the larger filter cake. The fixed teeth 34 at the ends of the tearing side plates 33 on both sides can temporarily fix the filter cake on its surface. After receiving the impact force of the filter cake, the block 32 will move to one side and drive the tearing side plate 33 to move synchronously. In the process of triggering the movement of the top block 32, the insertion groove 35 on the side of the tearing side plate 33 gradually contacts the top protrusion 37, and as the top protrusion 37 is inserted into the insertion groove 35, the tearing side plates 33 on both sides move to both sides respectively, and the filter cake stuck at the end of the triggering top block 32 is torn from between. The larger the filter cake in contact, the greater the impact force received by the triggering top block 32, and the deeper the top protrusion 37 is inserted into the insertion groove 35, so that the tearing side plates 33 on both sides move with a larger amplitude, generating The stronger the tearing force, the stronger the tearing force. During the unfolding of the tear side panels 33 on both sides, the elastic connecting plates 39 and the material removing wipers 40 in the hidden grooves 41 are designed to clean the residual materials on the triggering top block 32 and the tear side panels 33 during the stirring process to prevent the accumulation of materials from affecting the stirring effect. When the tear side panels 33 are in the closed state, the elastic connecting plates 39 are pushed by the top plate protrusions 42 and remain in a bent state. The material removing wipers 40 do not reach the end of the tear side panels 33 due to the bending of the elastic connecting plates 39. When the tear side panels 33 are unfolded, as the elastic connecting plates 39 gradually lose the pushing effect of the top plate protrusions 42, Because of the elastic straightening, the material removing wiper block 40 slides inside the inner groove 43 of the slideway and reaches the end of the tearing side plate 33. The sliding speed of the material removing wiper block 40 is increased by utilizing the elasticity of the elastic connecting plate 39 when it is straightened, generating a certain impact force, so that when the material removing wiper block 40 reaches the end of the tearing side plate 33, the torn filter cake stuck at the end of the tearing side plate 33 can be removed. Subsequently, the elastic block 36 is reset, and the limiting spring connected between the limiting slider 38 and the triggering top block 32 also begins to shrink, so that the tearing side plates 33 on both sides are retracted to the side surface of the triggering top block 32, waiting for the next filter cake tearing work. The drum assembly enables the hot air to form a rotating airflow field inside the dryer housing 1, which helps the hot air to fully contact and exchange heat with the material, thereby increasing the contact area between the material particles, further improving the heat exchange efficiency, and accelerating the drying speed; The inner cylinder 26 in the drum assembly is located in the heating chamber 24, and can stably rotate in the dryer housing 1 through the sliding ring 29 and the limiting slide 27. After a period of drying, the drum assembly will rotate once under the drive of the driving assembly to adjust the positions of both sides to ensure the uniformity of drying of the material in the inner cylinder 26. The multiple air flow rings 28 on the surface of the inner cylinder 26 help to evenly distribute the hot air in the cylinder, thereby improving the drying efficiency. The ventilation mesh plate 44 allows the hot air to pass through and enter the inner cylinder 26 and contact the material to achieve the purpose of drying. The rotating shaft 11 can rise under the control of the driving assembly and pass through the annular hoop 46 and the elastic The elastic telescopic block 47 cooperates with the adjustment groove 45 on the bottom surface of the inner cylinder 26, so that the stirring base rod 30 rotates with the inner cylinder 26 during the stirring process. Under the control of the driving component, the rotating shaft 11 drives the annular hoop 46 to rise, and the annular hoop 46 drives the clamping block 25 to enter the adjustment groove 45. After the clamping block 25 rotates to the position corresponding to the force groove, the elastic telescopic block 47 drives the clamping block 25 to extend and fit with the force groove. Then, when the rotating shaft 11 rotates, the inner cylinder 26 can be driven to rotate synchronously. After rotating to a certain amplitude, the driving motor drives the rotating shaft 11 to descend again, and the inner cylinder 26 stops rotating. The driving assembly drives the main rotating wheel to rotate through the driving motor 15, and the main rotating wheel is connected to the driven wheel 12 through the transmission belt 22, thereby driving the rotating shaft 11 and the stirring base rod 30 to rotate. The shaft sleeve allows the rotating shaft 11 to be adjusted in a small range during the driving process, so as to drive the rotating drum assembly to rotate. The small motor 14 will periodically reciprocate the height of the sliding mounting plate through the threaded rod and the lifting plate 13, thereby rotating the rotating drum assembly once, ensuring that the internal rotating drum assembly can maintain a uniform drying effect; When the materials reach a predetermined drying degree, they will be discharged from the dryer housing 1 through the discharge port 8. At this time, the materials will enter the main classifier 6 for preliminary classification. The main classifier 6 will classify the materials into different grades according to their particle size and density. The classified materials will be sent to the cyclone separator body 9 through the transmission pipe 7 for further separation and purification. The cyclone separator body 9 uses centrifugal force to separate the fine particles and dust in the materials, and send them to the auxiliary fan 17 through the outlet pipe 10. The auxiliary fan 17 generates a strong suction force to discharge these fine particles and dust from the equipment through the exhaust pipe 16 to ensure the purity and quality of the final product.

[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A drying equipment for zinc sulfide production, characterized in that: include: A dryer housing (1), wherein a processing mechanism is arranged inside the dryer housing (1), and the processing mechanism comprises a stirring assembly and a rotating drum assembly; The stirring assembly comprises: a stirring base rod (30), a plurality of stirring support rods (31) are arranged on the side surface of the stirring base rod (30), a movable trigger top block (32) is arranged on one side surface of the stirring support rod (31), an elastic block (36) is arranged on the side surface of the trigger top block (32) close to the stirring support rod (31), two sides of the elastic block (36) are respectively connected to the stirring support rod (31) and one side surface of the trigger top block (32), movable tear side plates (33) are arranged on the upper and lower sides of the trigger top block (32), an insertion groove (35) is further provided between the tear side plate (33) and the trigger top block (32), and a top position protrusion (37) matching the insertion groove (35) is arranged on the side surface of the stirring support rod (31) close to the tear side plate (33); The rotary drum assembly comprises: an inner drum body (26), the inner drum body (26) being located inside a heating chamber (24), a plurality of air flow rings (28) being arranged on the surface of the inner drum body (26), a sliding ring (29) being arranged at the top of the inner drum body (26), a limiting slideway (27) cooperating with the sliding ring (29) being arranged on the inner side wall of the dryer housing (1), and a ventilation mesh plate (44) being arranged on the bottom surface of the inner drum body (26).

2. A drying equipment for zinc sulfide production according to claim 1, characterized in that: A limiting slider (38) is also provided on a surface of one side of the tearing side plate (33) adjacent to the triggering top block (32) to facilitate improving the stability of the tearing side plate (33) when sliding and to prevent the tearing side plate (33) and the triggering top block (32) from completely separating. A limiting spring is also provided between one end of the limiting slider (38) and the triggering top block (32).

3. A drying equipment for zinc sulfide production according to claim 1, characterized in that: A fixed tooth (34) is provided on one end surface of the trigger top block (32), and a hidden groove (41) is provided on both upper and lower surfaces of the trigger top block (32). An elastic connecting plate (39) is provided on the surface of the hidden groove (41), and a material removal wiper block (40) is provided at one end of the elastic connecting plate (39) which is away from the hidden groove (41). A top plate protrusion (42) which cooperates with the elastic connecting plate (39) is provided inside the hidden groove (41). A slideway inner groove (43) which facilitates the sliding of the material removal wiper block (40) is provided on a side surface of the tearing side plate (33) which is close to the hidden groove (41), and limiting convex piles are provided on both sides of the material removal wiper block (40). Limiting slideways (43) which cooperate with the limiting convex piles are also provided on both sides of the inner surface of the slideway inner groove (43).

4. A drying equipment for zinc sulfide production according to claim 1, characterized in that: The bottom surface of the inner cylinder (26) is also provided with a positioning groove (45), and force grooves are also provided on both sides of the positioning groove (45). A rotatable rotating shaft (11) is also provided at the center of the positioning groove (45), and the upper surface of the rotating shaft (11) is fixedly connected to the bottom surface of the stirring base rod (30). The surface of the rotating shaft (11) is also sleeved with an annular hoop (46) that matches the positioning groove (45), and elastic telescopic blocks (47) are also provided on both side surfaces of the annular hoop (46), and the ends of the elastic telescopic blocks (47) are provided with engaging blocks (25) that match the force groove.

5. A drying equipment for zinc sulfide production according to claim 1, characterized in that: The processing mechanism further comprises a driving assembly, the driving assembly comprising: a driven wheel (12), the top surface of the driven wheel (12) being fixedly connected to the bottom surface of the rotating shaft (11), the rotating shaft (11) being further provided with an axle sleeve on the outside, the axle sleeve being capable of driving the rotating shaft (11) to perform a small range of lifting and lowering, a driving motor (15) being provided on one side surface of the driven wheel (12), a sliding mounting plate being provided on one side surface of the driving motor (15), the sliding mounting plate being connected to the bottom surface of the dryer housing (1) The bottom support frame (5) is slidably connected, a main rotating wheel is arranged at the end of the output shaft of the driving motor (15), a transmission belt (22) is connected between the main rotating wheel and the driven wheel (12), a small motor (14) is arranged on the bottom surface of the bottom support frame (5), a threaded rod is arranged on the output end of the small motor (14), a lifting plate (13) is fixedly installed between the shaft sleeve at the bottom of the bottom support frame (5) and the sliding mounting plate, and a threaded hole matching the threaded rod is opened at the center of the lifting plate (13).

6. A drying equipment for zinc sulfide production according to claim 1, characterized in that: The processing mechanism further comprises: a feeding assembly, the feeding assembly comprising: a feeding pipe (19), a locking block (25) matching the feeding pipe (19) is provided inside the dryer housing (1), a feeding port (20) is provided on the surface of the feeding pipe (19), an air outlet plate (21) is provided at the center of the feeding port (20), the air outlet plate (21) is a hollow structure and an air outlet is provided on the bottom surface, and an air duct (23) is connected between the upper surface of the air outlet plate (21) and the drying box (4).

7. A drying equipment for zinc sulfide production according to claim 1, characterized in that: A bottom support frame (5) is provided on the bottom surface of the dryer housing (1); an exhaust fan (2) is provided on one side surface of the dryer housing (1); an air outlet is provided at one end of the exhaust fan (2); a heating barrel (3) is provided on one side of the air outlet; a drying box (4) is provided on the side surface of the heating barrel (3) facing away from the exhaust fan (2); the drying box (4) is sleeved on the surface of the dryer housing (1); a main classifier (6) is also provided on one side of the dryer housing (1); a side surface of the dryer housing (1) close to the main classifier (6) is provided. There is a discharge port (8) at the beginning, a cyclone separator body (9) is arranged on one side surface of the discharge port (8), a fixed base frame (18) is arranged on the bottom surface of the cyclone separator body (9), an auxiliary fan (17) is arranged on one side of the fixed base frame (18), and an exhaust pipe (16) is arranged above the auxiliary fan (17), wherein the cyclone separator body (9), the main classifier (6) and the discharge port (8) are connected via a transmission pipe (7), and the auxiliary fan (17) and the cyclone separator body (9) are connected via an exhaust pipe (10).

8. A zinc sulfide production process, used for a drying device for zinc sulfide production according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1: There are two synthetic routes for zinc sulfide: one is to use hydrogen sulfide tail gas as raw material, and react with zinc acetate to produce zinc sulfide by double decomposition reaction, and the by-product acetic acid is used to produce sodium acetate with zinc oxide; the other is to use sodium sulfide and zinc acetate to produce zinc sulfide by double decomposition reaction, and sodium acetate can be concentrated by membrane separation equipment and sold as a by-product; S2: When preparing zinc acetate, a certain amount of water is added to the zinc acetate synthesis kettle, and zinc oxide is fed into the kettle through a mechanical fully enclosed automatic feeder. Fresh acetic acid or acetic acid filtrate is added after sufficient stirring. After stirring and reacting for a period of time, the mixture is pumped into a filter press to remove particles and impurities, and the zinc acetate solution is transferred to a zinc sulfide synthesis kettle for standby use; S3: Zinc sulfide synthesis route 1: Hydrogen sulfide is introduced into the zinc sulfide synthesis kettle to start the reaction at room temperature to produce nano zinc sulfide; S4: Zinc sulfide synthesis route 2: Add a certain amount of water to a sodium sulfide slurry kettle, add sodium sulfide and start stirring for slurrying, transfer to a filter press to remove insoluble particles and impurities, transfer the sodium sulfide liquid to a zinc sulfide synthesis kettle, and react at room temperature to produce nano zinc sulfide; S5: Zinc sulfide purification: The material in the reactor is transferred to a closed filter press for filtration. The filtrate is sodium acetate. The filter cake is washed with water once, and the washing liquid is pumped into the filtrate tank for reuse. The filter cake is sent to a flash dryer for drying. After crushing, it is placed in a calcining furnace for high-temperature calcination to change its nanostructure. Subsequently, the nano zinc sulfide solid is placed in a disperser and water is added to disperse it into slurry. The slurry is transferred to a plate and frame filter press for filtration. The filtrate is reused in the dispersion process. The filter cake is washed with water and sent to a flash dryer for secondary drying. After crushing, the nano zinc sulfide product is obtained.

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