A double-shaft stirring granulating device with atomizing spraying and adjustable discharging baffle

Abstract

This invention discloses a biaxial mixing granulation device with atomizing spray and an adjustable discharge baffle, belonging to the field of industrial solid waste treatment. The device includes a mixing shell and a sealing cover sealed to the mixing shell. Two sets of mixing shafts are arranged inside the mixing shell. A discharge baffle driven by an electric push rod is installed at the discharge end of the mixing shell to form a closed working space, enabling active and controllable adjustment of the material residence time. Atomizing nozzles are arranged above the mixing shell to uniformly atomize and spray liquid activator, forming a uniform and stable granular structure. To address the problem of brittle and easily broken granular surfaces in summer, a buffer cylinder and an elastic intercepting net are installed along the discharge path to buffer impact energy through elastic collision. To address the problem of wet and sticky granules that easily clog in winter, dust removal strips and a feeding machine are installed to blow solid powder onto the granular surface to reduce stickiness and prevent agglomeration. This achieves efficient granulation and stable discharge of industrial solid waste, featuring uniform granulation and complete discharge.

Description

Technical Field

[0001] This invention relates to the field of industrial solid waste treatment technology, specifically to a dual-shaft stirring granulation device with atomizing spray and adjustable discharge baffle. Background Technology

[0002] Industrial solid waste refers to solid, semi-solid, or gaseous waste materials placed in containers that are generated during industrial production, processing, mining, energy utilization, and other industrial activities and have lost their original utilization value or have been discarded / abandoned even if they have not lost their utilization value. It is abbreviated as industrial solid waste and is different from domestic waste and agricultural solid waste.

[0003] Existing industrial solid waste (referring to fly ash, red mud, desulfurization gypsum, slag, etc.) needs to be mixed with liquid activators to form a granular structure through physical tumbling action of equipment.

[0004] However, the above-mentioned equipment still has the following defects: 1. Ordinary twin-shaft mixer: It only has a mixing function. The discharge port is normally open or a simple gate. The material does not stay in the mixing chamber for long enough to form uniform granules. The output is mostly loose powder or wet lumps of varying sizes. 2. Existing water addition methods for mixers: Most use single-point water pipe injection, resulting in uneven liquid distribution, with some areas being too wet and clumping, and others being too dry and failing to form a solid shape. Summary of the Invention

[0005] The purpose of this invention is to provide a dual-shaft stirring granulation device with atomizing spray and adjustable discharge baffle to solve the problems of uneven granulation, uncontrollable material residence time, and uneven liquid addition in the prior art.

[0006] The technical problem to be solved by the present invention can be achieved by the following technical solution: a dual-shaft stirring granulation device with atomizing spray and adjustable discharge baffle, including a stirring shell and a sealing cover sealed to the stirring shell, wherein two sets of stirring shafts are arranged inside the stirring shell; The sealing cover is equipped with a plurality of atomizing nozzles, which are connected to each other by a long pipe. A water pump is installed outside the sealing cover. The output side of the water pump is connected to the long pipe through an output pipe. The input end of the water pump is equipped with an inlet pipe for a liquid activator. The mixing shell has a discharge port on its output side and a vertical groove on its output side. An electric push rod is installed above the vertical groove. A discharge baffle is installed at the extended end of the electric push rod to block the discharge port, and the discharge baffle slides in conjunction with the vertical groove.

[0007] Preferably, the outer wall of the stirring shaft is provided with a plurality of stirring arms, and the ends of the stirring arms are provided with stirring blades.

[0008] Preferably, a discharge pipe connected to the discharge port is installed outside the mixing shell, the output end of the discharge pipe is sealed to a buffer cylinder, the output end of the buffer cylinder is installed to a discharge pipe, and a dust collection box is installed at the bottom of the discharge pipe.

[0009] Preferably, a discharge port is provided on the side wall of the buffer cylinder opposite to the discharge pipe, and a plurality of guide rods for uniformly conveying clumps of particles are installed on the outer wall of the discharge port; a buffer groove is provided on the outer wall of the buffer cylinder opposite to the discharge port, and an elastic interception net is installed on the inner wall of the buffer cylinder opposite to the buffer groove.

[0010] Preferably, a dust collection area is formed between the outer wall of the buffer trough and the inner wall of the elastic interception net, and a dust discharge trough is provided on the outer wall of the dust collection area, with a dust collection pipe installed on the output side of the dust discharge trough.

[0011] Preferably, a dust removal strip with its output side facing the elastic interception net is installed on the top of the buffer cylinder, and a dust removal pipe 1 communicating with the dust removal strip is provided outside the buffer cylinder; a fan is installed on the output side of the dust collection pipe, and the output side of the fan is connected to the dust removal pipe 1; a dust removal pipe 2 is also connected to the outer wall of the dust removal pipe 1, and the output end of the dust removal pipe 2 extends into the dust collection box. A feeding machine is vertically installed above the dust discharge pipe.

[0012] Preferably, a filter screen is installed on the outer wall of the dust collection box opposite to the discharge pipe, a detachable collection drawer is installed at the bottom of the dust collection box, an interception plate is installed on the outer wall of the dust collection box, and the output side of the second dust discharge pipe is set towards the interception plate.

[0013] Preferably, the top of the sealing cap has a feeding port.

[0014] Preferably, the cross-section of the atomizing nozzle is fan-shaped.

[0015] A biaxial mixing granulation method with atomizing spray and adjustable discharge baffle includes the following steps: Step 1: Put the dry industrial solid waste into the mixing shell and premix it for 1-3 minutes by rotating the two sets of mixing shafts in opposite directions. Step 2: After premixing, the liquid activator enters the atomizing nozzle through the inlet pipe, water pump, and long pipe, and is evenly sprayed onto the surface of the material in the tumbling motion. Step 3: After spraying, keep the discharge baffle closed, the mixing shell forms a closed space, and the mixing shaft continues to tumble the material for 1 to 3 minutes to make the wet powder aggregate into a granular structure. Step 4: Once the particle size meets the requirements, the electric push rod drives the discharge baffle to open, completing the unloading process.

[0016] Compared with the prior art, the beneficial effects of this application are as follows: 1. This invention provides a discharge baffle at the discharge end of the mixing shell and connects the discharge baffle to an electric push rod. After the spraying operation is completed, the electric push rod drives the discharge baffle to remain closed, creating a selectively sealed working space inside the mixing shell. Through the coordinated operation of this sealed space and two sets of opposing rotating mixing shafts, the material is forced to tumble continuously inside the mixing shell after the liquid spraying is completed. This allows for active and controllable adjustment of the material residence time, ensuring that the powder has sufficient granulation time under mechanical and capillary forces, thereby forming a uniform and stable agglomerate structure. On the other hand, by setting up a liquid inlet pipe, a water pump, and a long pipe connected in sequence, and arranging the atomizing nozzle above the mixing shell and connecting it to the long pipe, the water pump provides pressure to transport the liquid activator through the long pipe to the atomizing nozzle and spray it out in a mist. Through the coordinated cooperation of the atomizing nozzle and two sets of opposing rotating stirring shafts, the material is sprayed evenly during the continuous tumbling motion inside the mixing shell, thereby achieving spatial uniform mixing of the liquid activator and the solid powder, avoiding local over-wetting and clumping or local dryness and failure to form.

[0017] 2. This invention solves the problem in Example 1 where the agglomerates, due to their "hard shell and soft core" structure, have reduced impact resistance and are prone to breakage and detachment of fine powder during unloading under high summer temperatures. This is achieved by sequentially setting a feed pipe, a buffer cylinder, and a discharge pipe outside the mixing shell, and by setting a guide rod and an elastic interception net inside the buffer cylinder. The guide rod evenly disperses the agglomerates as they enter the buffer cylinder, preventing excessive local impact force caused by concentrated agglomerate accumulation. The elastic interception net causes elastic collisions with the agglomerates during their fall, converting the impact kinetic energy into elastic potential energy to reduce the impact force.

[0018] 3. By installing a dust removal strip with its output side facing the elastic interception net at the top of the buffer cylinder, and connecting the dust removal strip to the fan via a dust removal pipe, and simultaneously installing a feeder vertically above the dust removal pipe, solid powder is quantitatively fed into the dust removal pipe. The airflow provided by the fan blows the solid powder through the dust removal strip onto the surface of the granules being fed into the buffer cylinder, causing the solid powder to adhere to the surface of the wet and sticky granules, thereby reducing their stickiness and solving the problem of granules sticking and agglomerating on the elastic interception net due to surface wetness in winter. Attached Figure Description

[0019] Figure 1 This is a perspective view of the overall structure of the present invention.

[0020] Figure 2 This is a three-dimensional view of the internal structure of the stirring shell in this invention.

[0021] Figure 3 This is a cross-sectional view of the overall structure in this invention.

[0022] Figure 4 yes Figure 3 Enlarged front view of the structure in region A.

[0023] Figure 5 This is a perspective view of the external structure of the feed pipe, buffer cylinder, and discharge pipe in this invention.

[0024] Figure 6 This is a three-dimensional view of the internal structure of the feed pipe, buffer cylinder, and discharge pipe in this invention.

[0025] Figure 7 This is a front view of the internal structure of the feed pipe, buffer cylinder, and discharge pipe in this invention. Figure 8 yes Figure 7 Enlarged front view of the structure in region B.

[0026] Figure 9 This is a three-dimensional structural view of the dust extraction pipe, dust discharge pipe one, dust discharge pipe two, and fan in this invention.

[0027] Explanation of reference numerals in the attached figures; 11. Support frame; 12. Sealing cover; 121. Water pump; 122. Long pipe; 123. Atomizing nozzle; 124. Liquid inlet pipe; 13. Mixing shell; 14. Feeding port; 131. Mixing shaft; 132. Mixing arm; 133. Mixing blade; 14. Feeding port; 15. Discharge pipe; 16. Vertical trough; 17. Discharge port; 18. Electric push rod; 19. Discharge baffle; 22. Buffer cylinder; 221. Discharge port; 222. Guide rod; 223. Elastic interception net; 224. Buffer trough; 225. Dust discharge trough; 226. Dust collection pipe; 23. Discharge pipe; 24. Dust collection box; 241. Collection drawer; 242. Interceptor plate; 25. Filter screen; 31. Dust discharge pipe one; 32. Feeder; 33. Fan; 35. Dust discharge pipe two; 36. Dust discharge strip. Detailed Implementation

[0028] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0029] Example 1 In the prior art, ordinary twin-shaft mixers suffer from technical problems such as insufficient material residence time and inability to form uniform granules due to the discharge port being constantly open or having only a simple gate, as well as uneven liquid distribution, local over-wetting and clumping, or failure to form solidified material due to single-point water pipe injection.

[0030] like Figures 1 to 4In this embodiment, a dual-shaft stirring granulation device with atomizing spray and adjustable discharge baffle includes a stirring shell 13, a support frame 11 supporting the stirring shell 13, and a sealing cover 12 sealed to the stirring shell 13. The top of the sealing cover 12 is provided with a feeding port 14. Two sets of stirring shafts 131 are arranged inside the stirring shell 13. Several stirring arms 132 are provided on the outer wall of the stirring shaft 131, and stirring blades 133 are provided at the ends of the stirring arms 132. It should be noted that: the two sets of stirring shafts 131 rotate in opposite directions to force the material to be stirred; stirring shaft 131: two parallel shafts with a center distance of 600mm and a speed of 30~60rpm adjustable by frequency conversion; stirring arms 132: 12~16 on each shaft, arranged in an alternating manner; the end of the stirring shaft 131 is equipped with a motor that drives it, and the motor is connected to the stirring shell 13.

[0031] A plurality of atomizing nozzles 123 are installed inside the sealing cover 12, and the plurality of atomizing nozzles 123 are connected to each other by a long pipe 122. A water pump 121 is installed outside the sealing cover 12, and the output side of the water pump 121 is connected to the long pipe 122 through an output pipe. A liquid inlet pipe 124 for liquid activator is installed at the input end of the water pump 121. The cross-section of the atomizing nozzles 123 is fan-shaped. It should be noted that there are 6 to 8 atomizing nozzles 123, which are evenly distributed along the length of the mixing shell 13 with a spacing of about 300 to 400 mm. The atomizing nozzles 123 are connected to the external liquid supply system through the liquid inlet pipe 124. The liquid inlet pipe 124 is equipped with a solenoid valve and a time relay to realize timed and quantitative spraying. The spray direction of the atomizing nozzles 123 is towards the surface of the tumbling material layer, 20 to 30 cm away from the material surface, and the atomization pressure is 0.4 to 0.6 MPa.

[0032] The mixing shell 13 has a discharge port 17 on its output side and a vertical groove 16 on its output side. An electric push rod 18 is installed above the vertical groove 16. A discharge baffle 19 is installed at the extended end of the electric push rod 18 to block the discharge port 17, and the discharge baffle 19 slides in conjunction with the vertical groove 16.

[0033] It should be noted that: the discharge baffle 19 is located at the discharge port 17 of the mixing tank. The discharge baffle 19 can be pulled up and down in the vertical direction of the vertical groove 16 to adjust its opening. When the discharge baffle 19 is fully closed, the material forms a closed loop in the cavity of the mixing shell 13, prolonging the residence time and realizing the rolling of particles in the machine. When the discharge baffle 19 is partially open, the discharge rate is controlled. When the discharge baffle 19 is fully open, the material is discharged quickly. The discharge baffle 19 is made of steel plate with a thickness of 8mm, and its width covers the full width of the discharge port 17. The vertical pulling stroke is 150mm.

[0034] The working principle of granulation: such as Figure 1-4Dry industrial solid waste materials such as fly ash, red mud, desulfurization gypsum, and slag are put into the mixing shell 13. Two sets of mixing shafts 131 rotate in opposite directions to force the materials to be turned over and mixed thoroughly. The premixing time is set to 1 to 3 minutes. After the dry material premixing is completed, the PLC controls the external liquid supply system to start automatically. The liquid activator enters the atomizing nozzle 123 through the liquid inlet pipe 124, water pump 121, long pipe 122, and is sprayed out to be evenly sprayed on the surface of the continuously tumbling material to complete the uniform mixing of the liquid medium. After the spraying operation is completed, the discharge baffle 19 remains closed, and the mixing shell 13 forms a closed working space. The material continues to tumble for 1 to 3 minutes under the drive of the two sets of mixing shafts 131 rotating in opposite directions. Under the combined action of mechanical stirring force and powder capillary force, the wet powder gradually aggregates, grows and forms a stable granular structure. Once the particle size reaches the process setting requirements, the electric push rod 18 drives the discharge baffle 19 to open, completing the unloading and output of the formed particles.

[0035] It should be emphasized that the core improvement of this embodiment lies in: On the one hand, by setting a discharge baffle 19 at the discharge end of the mixing shell 13 and connecting the discharge baffle 19 to the electric push rod 18, the discharge baffle 19 is kept closed by the electric push rod 18 after the spraying operation is completed, so that a selectively closed sealed working space is formed inside the mixing shell 13. Through the cooperation of this sealed space and two sets of opposing rotating mixing shafts 131, the material is still forcibly constrained in the mixing shell 13 and continues to roll after the liquid spraying is completed, thereby realizing the active and controllable adjustment of the material residence time, ensuring that the powder has sufficient granulation time under mechanical force and capillary force, and thus forming a uniform and stable granular structure. On the other hand, by setting up a liquid inlet pipe 124, a water pump 121, and a long pipe 122 connected in sequence, and arranging an atomizing nozzle 123 above the stirring shell 13 and connected to the long pipe 122, the water pump 121 provides pressure to transport the liquid activator through the long pipe 122 to the atomizing nozzle 123 and spray it out in a mist. Through the coordinated cooperation of the atomizing nozzle 123 and two sets of opposing rotating stirring shafts 131, the material is sprayed evenly during the continuous tumbling motion inside the stirring shell 13, thereby achieving spatial uniform mixing of the liquid activator and the solid powder, avoiding local over-wetting and clumping or local dryness and failure to form.

[0036] It should be noted that the PLC controller is electrically connected to the motor driving the stirring shaft 131, the water pump 121, the electric push rod 18, and the external liquid supply system.

[0037] Example 2 It is understandable that in Example 1, although a uniform and stable granular structure is obtained by closed granulation, under the high temperature conditions in summer, the increase in ambient temperature accelerates the reaction rate between the liquid activator and the industrial solid waste powder, causing the surface of the granules to harden rapidly and form a brittle structure, while the inside remains plastic, forming a "hard shell and soft core" structure. Under this structure, the impact resistance and wear resistance of the granules are significantly reduced, and they are easily broken by collision when discharged through the discharge baffle 19.

[0038] like Figures 5 to 6 To solve the above problems, a discharge pipe 15 is installed on the outside of the mixing shell 13 and is connected to the discharge port 17. The output end of the discharge pipe 15 is sealed to a buffer cylinder 22. The output end of the buffer cylinder 22 is equipped with a discharge pipe 23. A dust collection box 24 is installed at the bottom of the discharge pipe 23. A discharge port 221 is provided on the side wall of the buffer cylinder 22 opposite to the discharge pipe 15. Several guide rods 222 for uniform conveying of granules are installed on the outer wall of the discharge port 221. A buffer groove 224 is provided on the outer wall of the buffer cylinder 22 opposite to the discharge port 221. An elastic interception net 223 is installed on the inner wall of the buffer cylinder 22 opposite to the buffer groove 224.

[0039] The working principle of pellet feeding under summer conditions: such as Figure 5-6 After the discharge baffle 19 is opened, the granules enter the buffer cylinder 22 through the discharge pipe 15. First, they are physically guided by the guide rod 222 set on the outer wall of the discharge port 221, so that the granules are evenly dispersed before entering the interior of the buffer cylinder 22, avoiding excessive local impact caused by the concentrated accumulation of granules. The evenly dispersed granules continue to fall under the action of gravity and collide with the elastic interception net 223 installed on the inner wall of the buffer cylinder 22. The elastic interception net 223 undergoes elastic deformation under force, converting the impact kinetic energy of the granules into elastic potential energy, thereby reducing the falling speed and impact force of the granules and preventing the brittle surface of the granules from breaking due to impact under high temperature conditions in summer. The granules after elastic buffering are discharged through the discharge pipe 23, completing the unloading output.

[0040] It should be emphasized that the core improvement of this embodiment lies in the following: by sequentially setting the feed pipe 15, buffer cylinder 22 and discharge pipe 23 outside the mixing shell 13, and setting the guide rod 222 and elastic interception net 223 inside the buffer cylinder 22, the guide rod 222 evenly disperses the granules when they enter the buffer cylinder 22, avoiding the excessive local impact caused by the concentrated accumulation of granules; and the elastic interception net 223 causes elastic collision with the granules during their fall, converting the impact kinetic energy into elastic potential energy to reduce the impact force, thereby solving the problem in Embodiment 1 where the granules have reduced impact resistance due to the "hard shell and soft core" structure under high summer conditions, and are easily broken and fall off as fine powder during unloading.

[0041] It should be noted that by opening a buffer groove 224 on the side wall of the buffer cylinder 22 and installing a dust collection box 24 at the bottom of the discharge pipe 23, some fine powder is intercepted by the elastic interception net 223 and enters the buffer groove 224 for collection. The remaining dust is collected by the filter net 25, thereby realizing the recovery of the detached fine powder and reducing the environmental pollution caused by dust dispersion during the unloading process.

[0042] It should be noted that whether the particle size of the agglomerates meets the process setting requirements can be determined by one of the following methods: indirect judgment based on the preset running time of the stirring shaft 131; installing a particle size detection sensor in the stirring shell 13 to detect the particle size of the agglomerates in real time; or confirming it by manual sampling inspection. In this embodiment, the preset time control method is preferred, that is, the running time of the closed granulation stage is set to 1 to 3 minutes, and the particle size of the agglomerates is considered to meet the requirements when the time is up.

[0043] It should be noted that the elastic interception net 223 is made of steel wire woven mesh with an outer rubber layer or polyurethane elastomer material. The mesh size is 5-15mm, the elastic modulus is 10-50MPa, and the thickness is 3-8mm. This structure allows the mesh surface to undergo elastic deformation rather than plastic deformation when the particles come into contact with it, thereby converting the impact kinetic energy into elastic potential energy and preventing the brittle surface of the particles from shattering due to rigid collision.

[0044] It should be noted that the solid powder material is preferably the same powder material as the industrial solid waste.

[0045] Example 3 Understandably, in Example 2, the elastic interception net 223 effectively solved the problem of brittle fragmentation of granules in summer through elastic collision; however, at low temperatures in winter, the reaction rate of the liquid activator decreases and it is not consumed sufficiently, resulting in the granules being generally wet and sticky. The wet and sticky granules adhere to the elastic interception net 223 instead of collide elastically, gradually accumulating to form clumps, which affects the smooth flow of material. like Figures 7 to 9 To solve the above problems, a dust collection area is formed between the outer wall of the buffer trough 224 and the inner wall of the elastic interception net 223. A dust discharge trough 225 is provided on the outer wall of the dust collection area, and a dust collection pipe 226 is installed on the output side of the dust discharge trough 225. The top of the buffer cylinder 22 is equipped with a dust discharge bar 36 with its output side facing the elastic interception net 223. The buffer cylinder 22 is provided with a dust discharge pipe 31 that communicates with the dust discharge bar 36. A fan 33 is installed on the output side of the dust collection pipe 226. The output side of the fan 33 is connected to the dust discharge pipe 31. A second dust discharge pipe 35 is also connected to the outer wall of the first dust discharge pipe 31. The output end of the second dust discharge pipe 35 extends into the dust collection box 24. Among them, a feeding machine 32 is vertically installed above the dust discharge pipe 31.

[0046] A filter screen 25 is installed on the outer wall of the dust collection box 24 opposite to the discharge pipe 23. A detachable collection tray 241 is installed at the bottom of the dust collection box 24. An interceptor plate 242 is installed on the outer wall of the dust collection box 24, and the output side of the second dust discharge pipe 35 is set towards the interceptor plate 242. After the dust-containing gas is ejected at high speed from the second dust discharge pipe 35, it hits the interceptor plate 242, and the airflow direction changes abruptly. The powder loses kinetic energy after hitting the surface of the interceptor plate 242 due to inertia and falls into the collection tray 241 below. The gas bypasses the interceptor plate 242 and is discharged from the exhaust port of the dust collection box 24, thus realizing gas-solid separation.

[0047] Working principle of pellet feeding in winter: After the discharge baffle 19 is opened, the pellets are evenly dispersed by the guide rod 222 and enter the buffer cylinder 22. At this time, the blower 33, control valve 1 and feeder 32 are turned on. The feeder 32 feeds the solid powder into the dust discharge pipe 31 in a quantitative manner. The airflow generated by the blower 33 carries the solid powder through the dust discharge pipe 31 to the dust discharge bar 36. The dust discharge bar 36 sprays the powder towards the elastic interception net 223. The airflow carrying the powder blows onto the surface of the pellets during the feeding process, so that the solid powder is adsorbed on the surface of the wet and sticky pellets, reducing the stickiness of the pellet surface, thereby preventing the pellets from sticking and clumping on the elastic interception net 223. Excess powder that is not adsorbed onto the surface of the granules is drawn into the dust collection pipe 226 by the dust discharge trough 225 after passing through the elastic interception net 223 under the action of airflow. The powder-containing gas in the dust collection pipe 226 is re-entered into the dust discharge pipe 31 by the fan 33, and is circulated to the dust discharge bar 36 and sprayed out again, forming a closed-loop recycling of powder and continuously performing surface de-viscosity treatment on subsequent granules.

[0048] It should be emphasized that the core improvement of this embodiment lies in: by installing a dust removal strip 36 with the output side facing the elastic interception net 223 on the top of the buffer cylinder 22, and connecting the dust removal strip 36 to the fan 33 through the dust removal pipe 31, and at the same time, installing a feeder 32 vertically above the dust removal pipe 31, the feeder 32 quantitatively feeds solid powder into the dust removal pipe 31, and the airflow provided by the fan 33 blows the solid powder through the dust removal strip 36 onto the surface of the granules fed into the buffer cylinder 22, so that the solid powder is adsorbed on the surface of the wet and sticky granules to reduce their stickiness, thereby solving the problem of granules sticking and clumping on the elastic interception net 223 due to surface wetness in winter working conditions.

[0049] It should be noted that the feeding machine 32 and the fan 33 are both existing technologies and are fixed on the support frame 11 respectively. The feeding machine 32 is used to quantitatively feed refined solid waste into the dust discharge pipe 31, and the fan 33 is used to transport dust-containing gas. Their specific structures will not be described in detail.

[0050] It should be noted that control valve one is installed on the input side of dust discharge pipe one 31 (not shown in the figure) and is used to control the opening and closing of powder entering dust discharge bar 36; control valve two is installed on the outer wall of dust discharge pipe two 35 (not shown in the figure) and is used to control the opening and closing of powder entering dust collection box 24; when it is necessary to perform surface viscosity reduction treatment on the granules, control valve one is opened and control valve two is closed, so that the powder enters the circulating spraying circuit; when viscosity reduction treatment is not required, control valve one is closed and control valve two is opened, so that the powder is directly discharged into dust collection box 24 for recycling; and control valve one and control valve two are electrically connected to the PLC controller. Furthermore, when it is not necessary to coat the granules with powder, control valve one is closed and control valve two is opened, so that the powder is discharged through dust discharge pipe two 35 and intercepted in the collection drawer 241 in the dust collection box 24. During the process of the granules being discharged through the discharge pipe 23, excess powder is recovered through the filter screen 25 to avoid powder waste and reduce environmental pollution caused by dust dispersion during the unloading process.

[0051] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed application.

Claims

1. A twin-shaft mixing granulation device with atomizing spray and adjustable discharge baffle, comprising a mixing shell (13) and a sealing cover (12) sealed to the mixing shell (13), characterized in that, The stirring shell (13) is equipped with two sets of stirring shafts (131). The sealing cover (12) is equipped with a plurality of atomizing nozzles (123), and the plurality of atomizing nozzles (123) are connected to each other by a long pipe (122). A water pump (121) is installed outside the sealing cover (12), and the output side of the water pump (121) is connected to the long pipe (122) through an output pipe. The input end of the water pump (121) is equipped with a liquid inlet pipe (124) for a liquid activator. The mixing shell (13) has a discharge port (17) on its output side and a vertical groove (16) on its output side. An electric push rod (18) is installed above the vertical groove (16). A discharge baffle (19) is installed at the extended end of the electric push rod (18) to block the discharge port (17), and the discharge baffle (19) slides with the vertical groove (16).

2. The dual-shaft stirring granulation device with atomizing spray and adjustable discharge baffle as described in claim 1, characterized in that, The outer wall of the stirring shaft (131) is provided with a plurality of stirring arms (132), and the end of the stirring arm (132) is provided with stirring blades (133).

3. The dual-shaft stirring granulation device with atomizing spray and adjustable discharge baffle as described in claim 1, characterized in that, The mixing shell (13) is equipped with a discharge pipe (15) that is connected to the discharge port (17). The output end of the discharge pipe (15) is sealed with a buffer cylinder (22). The output end of the buffer cylinder (22) is equipped with a discharge pipe (23). The bottom of the discharge pipe (23) is equipped with a dust collection box (24).

4. The dual-shaft stirring granulation device with atomizing spray and adjustable discharge baffle as described in claim 3, characterized in that, The buffer cylinder (22) has a discharge port (221) on the side wall opposite to the discharge pipe (15). Several guide rods (222) for evenly conveying agglomerated particles are installed on the outer wall of the discharge port (221). A buffer groove (224) is provided on the outer wall opposite to the discharge port (221). An elastic interception net (223) is installed on the inner wall opposite to the buffer cylinder (22) and the buffer groove (224).

5. A twin-shaft mixing and granulation device with atomizing spray and adjustable discharge baffle as described in claim 4, characterized in that, A dust collection area is formed between the outer wall of the buffer trough (224) and the inner wall of the elastic interception net (223). A dust discharge trough (225) is provided on the outer wall of the dust collection area, and a dust collection pipe (226) is installed on the output side of the dust discharge trough (225).

6. The dual-shaft stirring granulation device with atomizing spray and adjustable discharge baffle as described in claim 5, characterized in that, The top of the buffer cylinder (22) is equipped with a dust removal strip (36) with its output side facing the elastic interception net (223). The buffer cylinder (22) is provided with a dust removal pipe (31) connected to the dust removal strip (36). A fan (33) is installed on the output side of the dust collection pipe (226). The output side of the fan (33) is connected to the dust removal pipe (31). A second dust removal pipe (35) is also connected to the outer wall of the first dust removal pipe (31). The output end of the second dust removal pipe (35) extends into the dust collection box (24). Among them, a feeding machine (32) is vertically installed above the dust discharge pipe (31).

7. A twin-shaft mixing and granulation device with atomizing spray and adjustable discharge baffle as described in claim 6, characterized in that, A filter screen (25) is installed on the outer wall of the dust collection box (24) opposite to the discharge pipe (23). A detachable collection drawer (241) is installed at the bottom of the dust collection box (24). An interceptor plate (242) is installed on the outer wall of the dust collection box (24), and the output side of the second dust discharge pipe (35) is set towards the interceptor plate (242).

8. A twin-shaft mixing and granulation device with atomizing spray and adjustable discharge baffle as described in claim 1, characterized in that, The top of the sealing cover (12) is provided with a feeding port (14).

9. A twin-shaft mixing and granulation device with atomizing spray and adjustable discharge baffle as described in claim 1, characterized in that, The cross-section of the atomizing nozzle (123) is fan-shaped.

10. A biaxial stirring granulation method with atomizing spray and adjustable discharge baffle, characterized in that, The biaxial stirring granulation device with atomizing spray and adjustable discharge baffle as described in any one of claims 1-9, and the biaxial stirring granulation method with atomizing spray and adjustable discharge baffle include the following steps: Step 1: Put the dry industrial solid waste into the mixing shell (13), and premix it for 1 to 3 minutes by rotating the two sets of mixing shafts (131) in opposite directions. Step 2: After premixing, the liquid activator enters the atomizing nozzle (123) through the liquid inlet pipe (124), water pump (121), and long pipe (122) and is evenly sprayed onto the surface of the material in the tumbling motion; Step 3: After spraying, the discharge baffle (19) remains closed, the mixing shell (13) forms a closed space, and the mixing shaft (131) continues to tumble the material for 1 to 3 minutes, so that the wet powder aggregates to form a granular structure. Step 4: After the particle size of the agglomerates reaches the required level, the electric push rod (18) drives the discharge baffle (19) to open, completing the unloading.

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