Recovery device
By designing a recovery device that includes evaporation separation and dissolution recovery units, the problem of severe sodium cyanide loss during sodium cyanide production was solved, achieving efficient recovery of sodium cyanide, improving production yield and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEBEI CHENGXIN
- Filing Date
- 2025-07-07
- Publication Date
- 2026-06-16
AI Technical Summary
In the production process of sodium cyanide, the externally sourced mother liquor contains a large amount of sodium cyanide active components, which leads to a decline in product quality and low yield, and increases production costs.
Design a recovery device including an evaporation separation unit and a dissolution recovery unit. Through the combination of negative pressure evaporation, solid-liquid separation, stirring and dissolution vessel, sodium cyanide is recovered from the externally collected mother liquor. The stirring shaft and spray holes are used to fully dissolve and mix the sodium cyanide.
This improved the production yield of sodium cyanide, reduced production costs, and enhanced the company's market competitiveness.
Smart Images
Figure CN224358017U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of chemical equipment technology, and specifically relates to a recycling device. Background Technology
[0002] Sodium cyanide is an important basic chemical raw material used in basic chemical synthesis, electroplating, metallurgy, organic synthesis, pharmaceuticals, pesticides, and metal processing as a complexing agent and masking agent. Sodium cyanide has a wide range of applications, and its quality and yield are crucial to the development of enterprises. In the current continuous production process of solid sodium cyanide, impurities such as sodium formate accumulate in the evaporation system, which affects the quality of the solid sodium cyanide product as production continues.
[0003] To ensure the quality of solid sodium cyanide, it is necessary to purchase the centrifugal mother liquor from external sources. While this method effectively controls the quality of the sodium cyanide product, the mother liquor contains not only impurities such as sodium formate but also a large amount of effective sodium cyanide components, resulting in significant waste and affecting the overall yield of the sodium cyanide product. This greatly increases the company's production costs and is detrimental to its market competitiveness. Given the problems existing in the current sodium cyanide production system, there is an urgent need to develop a sodium cyanide recovery device. Utility Model Content
[0004] This utility model provides a recycling device aimed at solving the problems of severe sodium cyanide loss and low product yield in the sodium cyanide production process.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a recycling device, comprising:
[0006] An evaporation separation unit includes a negative pressure evaporator and a solid-liquid separator; the solid-liquid separator is connected to the negative pressure evaporator via an evaporation conveying pipeline; the solid-liquid separator is equipped with a solid conveying pipeline and a mother liquor conveying pipeline;
[0007] The dissolution and recovery unit includes a solid silo and a dissolution vessel. The solid silo is connected to the solid-liquid separator through the solid conveying pipeline, and the dissolution vessel is connected below the solid silo.
[0008] A stirring mechanism includes a stirring motor and a stirring shaft. The stirring motor is located at the top of the solid silo, and the stirring shaft extends from top to bottom through the solid silo and the dissolving vessel.
[0009] A sieve plate is installed inside the solid silo, and the stirring shaft passes through the sieve plate.
[0010] In one possible implementation, the screening plate is supported within the solid hopper by a bracket, and a material drop gap is provided between the outer edge of the screening plate and the inner wall of the solid hopper.
[0011] In one possible implementation, the stirring shaft is provided with a stirring paddle, the lower edge of which is in contact with the screen plate, and the stirring paddle scrapes the fixed material falling onto the screen plate as the stirring shaft rotates.
[0012] In one possible embodiment, the impeller has a hollow cavity; the stirring shaft is a hollow shaft, the central hole of the stirring shaft is connected to the hollow cavity of the impeller through a radial through hole, and a plurality of spray holes connected to the hollow cavity are respectively provided on two opposite sides of the impeller.
[0013] In one possible implementation, the spray holes are inclined holes that are tilted toward the screen plate.
[0014] In one possible implementation, a bushing keyed to the stirring shaft is provided at the middle position of the stirring paddle, and the bushing is provided with the radial through hole.
[0015] In one possible implementation, the stirring shaft includes an upper stirring rod located within the solid hopper and a lower stirring rod located within the dissolving vessel; the upper end of the lower stirring rod is connected to the lower end of the upper stirring rod; the upper stirring rod is provided with a water spray hole communicating with the central hole; and the lower stirring rod is provided with helical blades.
[0016] In one possible implementation, the inner wall of the dissolving vessel is provided with a baffle that does not interfere with the rotating helical blades.
[0017] In one feasible approach, the solids hopper is conical.
[0018] In one possible implementation, a stirring blade is provided on the inner side of the bottom of the dissolving vessel, and the stirring blade is driven to rotate by a drive motor located on the outer side of the bottom of the dissolving vessel.
[0019] Compared with the prior art, the recovery device provided by this utility model has the following advantages: the externally collected mother liquor enters the negative pressure evaporator of the evaporation separation unit for secondary negative pressure evaporation. When the material in the negative pressure evaporator evaporates to the end point, the material that has evaporated to the end point is introduced into the solid-liquid separator along the evaporation conveying pipeline. Solid separation is carried out through the solid-liquid separator. The separated liquid enters the mother liquor recovery unit along the mother liquor conveying pipeline. The separated solid material enters the solid silo through the solid conveying pipeline along the silo inlet. The solid material enters the dissolving kettle at a uniform speed through the screen plate. Under the drive of the stirring motor, the solid material is stirred.
[0020] Before the solid material enters the dissolving tank, primary water is transported to the solid-liquid dissolving tank through a primary water pipeline. At the same time, the water is fully dissolved and mixed with the falling solid sodium cyanide material under the action of the stirring shaft. This allows for the effective recovery of sodium cyanide from the mother liquor, greatly improving the production yield of sodium cyanide.
[0021] The recovery device provided in this application is used to recover sodium cyanide from externally sourced mother liquor. It can effectively recover the sodium cyanide components lost in the externally sourced mother liquor without affecting the quality of the sodium cyanide product. After recovering sodium cyanide from the externally sourced mother liquor, it can effectively increase the extraction rate in the solid sodium cyanide production process, improve the production yield of solid sodium cyanide, reduce the loss of sodium cyanide, thereby reducing the production cost of enterprises and greatly increasing the competitiveness and influence of enterprises in the market. It has high application and promotion value. Attached Figure Description
[0022] Figure 1 A schematic diagram of the structure of the recycling device provided in the embodiment of this utility model;
[0023] Figure 2 A top view of the solid silo provided in an embodiment of this utility model;
[0024] Figure 3 A schematic diagram of the main structure of the stirring paddle and sieve plate provided in an embodiment of this utility model (showing the spray holes).
[0025] Figure 4 for Figure 3 The provided side view diagram of the agitator and screen plate (showing the spray holes and the inclination of the screen plate, where the number of spray holes is related to...) Figure 3 Inconsistencies do not affect the display of the tilt angle, nor do they affect the understanding of the solution.
[0026] Explanation of reference numerals in the attached figures:
[0027] 1. Negative pressure evaporator; 2. First density online monitor; 3. Mass flow meter; 4. Control and regulating valve; 5. Feed pump; 6. Solid-liquid separator; 7. Evaporation conveying pipeline; 8. Dissolving kettle; 9. Mother liquor conveying pipeline; 10. Solid conveying pipeline; 11. Solid silo; 12. Silo inlet; 13. Stirring motor; 14. Screen plate; 15. Stirring shaft; 16. Water spray hole; 17. Stirring paddle; 18. Spiral blade; 19. Second density online monitor; 20. Baffle plate; 21. Stirring blade; 22. Fixing plate; 23. Drive motor; 24. Dissolved liquid conveying pipeline; 25. Primary water conveying pipeline; 26. Screen hole; 27. Connecting rod; 28. Spray hole; 281. Hole center axis; 29. Screw sleeve; 30. Mother liquor recovery device; 31. Radial through hole; 32. Bushing; 33. Rotary joint. Detailed Implementation
[0028] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0029] Please see Figures 1 to 3 The recovery device provided by this utility model will now be described. The recovery device includes an evaporation separation unit and a dissolution recovery unit. The evaporation separation unit includes a negative pressure evaporator 1 and a solid-liquid separator 6. The solid-liquid separator 6 is connected to the negative pressure evaporator 1 through an evaporation conveying pipeline 7. The solid-liquid separator 6 is provided with a solid conveying pipeline 10 and a mother liquor conveying pipeline 9. The externally collected mother liquor enters the negative pressure evaporator 1 of the evaporation separation unit for secondary negative pressure evaporation. When the material in the negative pressure evaporator 1 evaporates to the endpoint, the material that has evaporated to the endpoint is introduced into the solid-liquid separator 6 along the evaporation conveying pipeline 7. Solid separation is performed through the solid-liquid separator 6. The separated liquid enters the mother liquor recovery unit 30 along the mother liquor conveying pipeline 9, and the separated solid material enters the solid silo 11 through the solid conveying pipeline 10 along the silo inlet 12.
[0030] The dissolution and recovery unit includes a solid silo 11 and a dissolution vessel 8. The solid silo 11 is connected to a solid-liquid separator 6 via a solid conveying pipeline 10. The dissolution vessel 8 is connected below the solid silo 11. A primary water conveying pipeline 25 is provided on the dissolution vessel 8. Before the solid material enters the dissolution vessel 8, primary water is conveyed to the solid-liquid dissolution vessel 8 in advance through the primary water conveying pipeline 25. At the same time, it is fully dissolved and mixed with the falling solid sodium cyanide material under the action of the stirring shaft 15.
[0031] The stirring mechanism includes a stirring motor 13 and a stirring shaft 15. The stirring motor 13 is located at the top of the solid material silo 11, and the stirring shaft 15 passes through the solid material silo 11 and the dissolving vessel 8 from top to bottom. The solid material silo 11 and the dissolving vessel 8 share a stirring motor 13 for driving. After the solid material is evenly distributed through the sieve plate 14, it enters the dissolving vessel 8 below, which improves the uniformity of the mixing of solid material and water.
[0032] The sieve plate 14 is installed inside the solid silo 11. The stirring shaft 15 passes through the sieve plate 14. A through hole is provided at the center of the sieve plate 14 for the stirring shaft 15 to pass through, so as not to hinder the rotation of the stirring shaft 15. The solid silo 11 is provided with a silo inlet 12, and the solid material entering falls onto the sieve plate 14.
[0033] Compared with the prior art, the recycling device provided by this utility model has the following advantages: the externally collected mother liquor enters the negative pressure evaporator 1 of the evaporation separation unit for secondary negative pressure evaporation. When the material in the negative pressure evaporator 1 evaporates to the end point, the material that has evaporated to the end point is introduced into the solid-liquid separator 6 along the evaporation conveying pipeline 7. Solid separation is carried out through the solid-liquid separator 6. The separated liquid enters the mother liquor recovery unit 30 along the mother liquor conveying pipeline 9. The separated solid material enters the solid silo 11 through the solid conveying pipeline 10 along the silo inlet 12. The solid material enters the dissolving kettle 8 at a uniform speed through the screen plate 14. Under the drive of the stirring motor 13, the solid material is stirred.
[0034] Before the solid material enters the dissolving tank 8, primary water is transported to the solid-liquid dissolving tank 8 through the primary water conveying pipeline 25. At the same time, the water is fully dissolved and mixed with the falling solid sodium cyanide material under the action of the stirring shaft 15, thereby effectively recovering sodium cyanide from the mother liquor and greatly improving the production yield of sodium cyanide.
[0035] The recovery device provided in this application is used to recover sodium cyanide from externally sourced mother liquor. It can effectively recover the sodium cyanide components lost in the externally sourced mother liquor without affecting the quality of the sodium cyanide product. After recovering sodium cyanide from the externally sourced mother liquor, it can effectively increase the extraction rate in the solid sodium cyanide production process, improve the production yield of solid sodium cyanide, reduce sodium cyanide loss, reduce the production cost of sodium cyanide, and greatly increase the competitiveness and influence of enterprises in the market. It has high application and promotion value.
[0036] Explained, in industrial or chemical processes, "endpoint" in "material evaporated to the endpoint" typically refers to the target state or completed stage of the evaporation process, and may specifically include one or more of the following: target concentration or viscosity, the dry state of the material, phase change, or crystallization point. In this application, "evaporation to the endpoint" means that the material is concentrated to a suitable concentration after evaporation in the negative pressure evaporator 1.
[0037] Overall yield refers to the ratio between the total amount of raw materials input and the total amount of products actually generated in a chemical or industrial production process. Specifically, overall yield can be calculated using the following formula:
[0038] Yield = Actual qualified output / Theoretical output × 100%, or Yield = Amount of raw material used to produce the target product / Amount of raw material fed × 100%.
[0039] Yield is an important indicator for measuring the efficiency of a production process, usually expressed as a percentage by mass or volume. A higher yield indicates that more of the raw materials are effectively utilized to generate the target product.
[0040] In some embodiments, see Figure 1 and Figure 2 As shown, the screen plate 14 is supported in the solid silo 11 by a bracket, and a material drop gap is provided between the outer edge of the screen plate 14 and the inner wall of the solid silo 11.
[0041] In this application, the diameter of the screening holes 26 on the screening plate 14 is 1.0cm-2.0cm. After the sodium cyanide solid material enters the solid material hopper 11 through the feed inlet 12, it first passes through the screening holes 26 on the screening plate 14 into the dissolving vessel 8. The screening holes 26 can buffer the sodium cyanide solid material to prevent a large amount of solid material from entering the dissolving vessel 8 instantly and affecting the dissolution effect.
[0042] The support can provide strong support for the screen plate 14. At the same time, when the screen holes 26 on the screen plate 14 are actually blocked, the solid material can be introduced into the dissolving kettle 8 through the material drop gap between the screen plate 14 and the solid material bin 11.
[0043] Optionally, the support includes a plurality of connecting rods 27 radially connected between the sieve plate 14 and the solid material bin 11, allowing solid material to fall into the dissolving vessel 8 through the gaps between the connecting rods 27.
[0044] In some embodiments, see Figure 1 As shown, a stirring paddle 17 is mounted on the stirring shaft 15. The lower edge of the stirring paddle 17 is in contact with the screen plate 14. The stirring paddle 17 rotates with the stirring shaft 15, scraping the fixed material falling onto the screen plate 14. The length of the stirring paddle 17 is the same as the diameter of the screen plate 14. The stirring paddle 17 rotates along the surface of the screen plate 14 with the stirring shaft 15, which can strongly disturb the solid material entering the upper surface of the screen plate 14 without easily clogging the screen plate 14, so that the solid material can smoothly enter the dissolving kettle 8. At the same time, the lower edge of the stirring paddle 17 can act as a scraper to scrape the solid material on the surface of the screen plate 14, effectively avoiding the clogging problem of the screen holes 26.
[0045] In some embodiments, see Figure 2 and Figure 3 As shown, the stirring paddle 17 has a hollow cavity; the stirring shaft 15 is a hollow shaft, and the central hole of the stirring shaft 15 is connected to the hollow cavity of the stirring paddle 17 through a radial through hole 31. Several spray holes 28 connected to the hollow cavity are respectively provided on two opposite sides of the stirring paddle 17. While the stirring paddle 17 rotates, the water sprayed from the spray holes 28 can spray onto the screen plate 14, washing the screen holes 26 at the upper end of the screen plate 14 and preventing the screen holes 26 from becoming blocked.
[0046] When there is too much material accumulated on the surface of the screen plate 14 or the screen holes 26 on the surface of the screen plate 14 become clogged, primary water is injected into the screen plate 14 through the spray hole 28, which can dissolve the accumulated and clogged solid material to a certain extent and ensure the smooth flow of the dissolution system.
[0047] A rotary joint 33 is installed on the stirring shaft 15. The rotary joint 33 is connected to an external water supply pipe, which is connected to a clear water tank via a pump. Clear water can be pumped into the central hole of the stirring shaft 15 through the water supply pipe, and then through the radial through hole 31 on the bushing 32 connecting the stirring shaft 15 and the stirring paddle 17, into the hollow cavity of the stirring paddle 17, and finally sprayed out from the spray hole 28 provided on the stirring paddle 17. The rotary joint 33 is a pipeline connection device, and the connected pipeline (stirring shaft 15 in this application) can rotate relative to each other, and can be used to transport various media such as gas, liquid, and oil.
[0048] In some embodiments, see Figure 3 , Figure 4 As shown, the spray hole 28 is an inclined hole that is tilted towards the screen plate 14. The central axis 281 of the spray hole 28 forms an angle β with the screen plate 14. The two opposite sides of the stirring paddle 17 form an angle α with the screen plate 14, where α=β=45°. In this way, the sprayed water can be directly sprayed onto the screen plate 14, which has a certain impact force on the solid material on the screen plate 14. Therefore, it can, to a certain extent, flush away the solid material in the screen hole 26.
[0049] In some embodiments, see Figure 2 As shown, a bushing 32, which is keyed to the stirring shaft 15, is provided at the middle position of the stirring paddle 17. The bushing 32 has a radial through hole 31. The stirring paddle 17 and the stirring shaft 15 need to rotate synchronously, which can be achieved by using a key connection. At the same time, a shaft retaining ring, a shoulder, or a locking nut can be provided on the stirring shaft 15 to limit the axial position of the stirring paddle 17.
[0050] The impeller 17 and the bushing 32 can be an integral structure or welded together to ensure the synchronous rotation of the impeller 17, the bushing 32 and the impeller shaft 15.
[0051] The radial through hole 31 here needs to penetrate the stirring shaft 15 and connect with the center hole of the stirring shaft 15 to open up the water flow channel.
[0052] In some embodiments, see Figure 1 As shown, the stirring shaft 15 includes an upper stirring rod located in the solid material hopper 11 and a lower stirring rod located in the dissolving vessel 8; the upper end of the lower stirring rod is connected to the lower end of the upper stirring rod; the upper stirring rod is provided with a water spray hole 16 that communicates with the central hole; and the lower stirring rod is provided with a spiral blade 18.
[0053] The lower stirring rod and the upper stirring rod can be connected by threads, by threaded sleeve 29, or by coupling. The lower stirring rod may not have a water spray hole 16.
[0054] When sodium cyanide solid material enters the dissolving vessel 8 from the solid material hopper 11, the spiral blades 18 are driven by the stirring motor 13 to rotate, which enables the solid material to be effectively dispersed and dissolved in the dissolving vessel 8.
[0055] The upper section of the stirring rod inside the solid material silo 11 is equipped with a water spray hole 16. The sprayed water has the effect of dissolving and stirring the solid material falling downward inside the solid material silo 11. The sprayed water is directed towards the inner wall of the solid material silo 11, which can wash away the material adhering to the inner wall of the solid material silo 11, avoid the waste of sodium cyanide solid material, and help improve the recovery rate of sodium cyanide.
[0056] In some embodiments, see Figure 1 As shown, the inner wall of the dissolving vessel 8 is provided with a baffle plate 20 that does not interfere with the rotating spiral blades 18. The spiral blades 18 drive the solid and liquid phases to dissolve rapidly. When the dissolved material encounters the baffle plate 20, the baffle plate 20 exerts a certain lateral shearing effect on the solution, ensuring the full dissolution of the material.
[0057] Multiple layers of baffles 20 are arranged from top to bottom on the inner wall of the dissolving vessel 8. Each layer of baffles 20 consists of one or two baffles, and the baffles 20 in different layers are staggered in the vertical direction.
[0058] In some embodiments, see Figure 1 As shown, the solid silo 11 is conical in shape to facilitate the smooth flow of pre-dissolved and undissolved materials into the dissolving vessel 8, thereby reducing the accumulation of materials on the inner wall of the solid silo 11 and thus improving the yield of sodium cyanide.
[0059] In some embodiments, see Figure 1 As shown, a stirring blade 21 is provided on the inner side of the bottom of the dissolving vessel 8. The stirring blade 21 is driven to rotate by a drive motor 23 located on the outer side of the bottom of the dissolving vessel 8. The stirring blade 21 at the bottom of the dissolving vessel 8 is mainly used to stir the material falling to the bottom of the dissolving vessel 8, supplementing the stirring of the spiral blade 18. On the one hand, it prevents the material falling to the bottom of the dissolving vessel 8 from becoming a dead zone and being unable to be recovered. On the other hand, by supplementing the stirring at the bottom of the dissolving vessel 8, the uniformity of the stirring of all materials in the dissolving vessel 8 is improved, thereby improving the recovery efficiency and recovery rate of sodium cyanide.
[0060] A solution delivery pipeline 24 is provided on the bottom side of the dissolving vessel 8. The stirring blade 21 is 100mm-150mm away from the bottom of the dissolving vessel 8. At the same time, the upper surface of the stirring blade 21 is lower than the center height of the solution delivery pipeline 24. A fixing plate 22 is provided on the outer end face of the bottom of the dissolving vessel 8, and the drive motor 23 is installed below the fixing plate 22.
[0061] To meet the current needs of automated control, this application provides a first density online monitoring instrument 2 in the upper, middle and lower parts of the negative pressure evaporator 1, which is used to monitor the evaporation of the material in the negative pressure evaporator 1 in real time, and to effectively and timely collect the evaporated material by displaying the data.
[0062] See Figure 1 As shown, several second density online monitoring instruments 19 are installed at different heights (top, middle, and bottom) of the dissolving vessel 8 to monitor the density of the liquid inside the dissolving vessel 8 in real time. Each pipeline is also equipped with a control valve 4 and a mass flow meter 3 to detect and adjust the material flow rate in real time; each pipeline is also equipped with a feeding pump 5 for conveying the material. It should be noted that these components on each pipeline are not individually labeled.
[0063] The recovery device provided in this application operates as follows:
[0064] The externally sourced mother liquor enters the negative pressure evaporator 1 of the evaporation separation unit for secondary negative pressure evaporation. When the material in the negative pressure evaporator 1 reaches the end point of evaporation, the material at the end point of evaporation is introduced into the solid-liquid separator 6 or centrifuge along the evaporation conveying pipeline 7. Solid separation is carried out through the solid-liquid separator 6. The separated liquid enters the mother liquor recovery unit 30 along the mother liquor conveying pipeline 9, and the separated solid enters the solid silo 11 through the solid conveying pipeline 10 along the silo inlet 12. Driven by the stirring motor 13 and stirred by the stirring paddle 17, the solid material enters the dissolving kettle 8 at a uniform speed through the screen holes 26 on the surface of the screen plate 14.
[0065] Before the solid enters the dissolving vessel 8, primary water is transported to the dissolving vessel 8 through the primary water delivery pipeline 25. At the same time, the solid sodium cyanide material is fully dissolved and mixed with the falling solid sodium cyanide material under the synergistic action of the spiral blade 18 and the baffle plate 20.
[0066] To prevent some solid materials from not dissolving completely and solid materials that sink to the bottom of the dissolving vessel 8 from not dissolving completely, a stirring blade 21 is installed at the bottom of the dissolving vessel 8. The stirring blade 21 is driven by a drive motor 23 to rotate, which can fully stir and mix the materials at the bottom of the dissolving vessel 8. A second density online monitoring instrument 19 installed on the side of the dissolving vessel 8 can monitor the density of the solution inside the dissolving vessel 8 in real time to ensure the uniformity of material mixing.
[0067] After all the solid material has dissolved, the solution is introduced into the normal production system of sodium cyanide through the solution delivery pipeline 24. During the dissolution process of the sodium cyanide solid material, fresh primary water is periodically injected through the water spray holes 16 on the stirring shaft 15 and the spray holes 28 on the stirring paddle 17 to thoroughly rinse the surface of the screen plate 14 and the screen holes 26, ensuring the normal operation of the dissolution system.
[0068] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.
[0069] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A recycling device, characterized in that, include: An evaporation separation unit includes a negative pressure evaporator (1) and a solid-liquid separator (6); the solid-liquid separator (6) is connected to the negative pressure evaporator (1) through an evaporation conveying pipeline (7); the solid-liquid separator (6) is provided with a solid conveying pipeline (10) and a mother liquor conveying pipeline (9); The dissolution and recovery unit includes a solid silo (11) and a dissolution vessel (8). The solid silo (11) is connected to the solid-liquid separator (6) through the solid conveying pipeline (10). The dissolution vessel (8) is connected below the solid silo (11). A primary water conveying pipeline (25) is provided on the dissolution vessel (8). The stirring mechanism includes a stirring motor (13) and a stirring shaft (15). The stirring motor (13) is located at the top of the solid silo (11), and the stirring shaft (15) extends from top to bottom through the solid silo (11) and the dissolving vessel (8). A sieve plate (14) is disposed inside the solid silo (11), and the stirring shaft (15) passes through the sieve plate (14).
2. The recycling device as described in claim 1, characterized in that, The sieve plate (14) is supported in the solid silo (11) by a bracket, and a material drop gap is provided between the outer edge of the sieve plate (14) and the inner wall of the solid silo (11).
3. The recycling device as described in claim 1, characterized in that, A stirring paddle (17) is provided on the stirring shaft (15). The lower edge of the stirring paddle (17) is in contact with the screen plate (14). The stirring paddle (17) scrapes the fixed material falling onto the screen plate (14) as the stirring shaft (15) rotates.
4. The recycling device as described in claim 3, characterized in that, The stirring paddle (17) has a hollow cavity; the stirring shaft (15) is a hollow shaft, and the central hole of the stirring shaft (15) is connected to the hollow cavity of the stirring paddle (17) through a radial through hole (31). The two opposite sides of the stirring paddle (17) are respectively provided with a plurality of spray holes (28) that are connected to the hollow cavity.
5. The recycling device as described in claim 4, characterized in that, The spray hole (28) is an inclined hole that is inclined toward the screen plate (14).
6. The recycling device as described in claim 4, characterized in that, The stirring paddle (17) is provided with a bushing (32) that is keyed to the stirring shaft (15) at the middle position, and the bushing (32) is provided with the radial through hole (31).
7. The recycling device as described in claim 4, characterized in that, The stirring shaft (15) includes an upper stirring rod located in the solid silo (11) and a lower stirring rod located in the dissolving vessel (8); the upper end of the lower stirring rod is connected to the lower end of the upper stirring rod; the upper stirring rod is provided with a water spray hole (16) communicating with the central hole; the lower stirring rod is provided with a spiral blade (18).
8. The recycling device as described in claim 7, characterized in that, The inner wall of the dissolving vessel (8) is provided with a baffle plate (20) that does not interfere with the rotating spiral blades (18).
9. The recycling device as described in claim 1, characterized in that, The solid silo (11) is conical.
10. The recycling device as described in claim 1, characterized in that, The bottom inner side of the dissolving vessel (8) is provided with stirring blades (21), which are driven to rotate by a drive motor (23) located on the bottom outer side of the dissolving vessel (8).