Multistage evaporation condenser for producing spherical zinc powder

Abstract

The embodiment of the application provides a kind of multistage evaporation condenser for spherical zinc powder production, it is related to spherical zinc powder production technical field.It includes protection box, cold water pool, support and be located on the support evaporator, condensing mechanism, spraying mechanism and circulating mechanism.The condensing tube of condensing mechanism is communicated with the first-stage precipitation pipe and the second-stage precipitation pipe of different inner diameter, realize that zinc vapor is directly classified precipitation according to particle size in the condensation process;Buffering component is arranged below precipitation pipe, and the helix driven by the water power of spraying mechanism rotates in buffering component, and the smooth falling of powder is generated by filter plate through negative pressure;Circulating mechanism is sent back to evaporator after condensing gas purification, drying and is recycled.The present application realizes online classification condensation by different inner diameter precipitation pipe, avoids the damage of powder caused by subsequent screening;Utilize the water power driven negative pressure collection, energy saving and anti-clogging;At the same time, realize inert gas closed cycle, reduce production cost, improve product quality and production continuity.

Description

Technical Field

[0001] This invention relates to the field of spherical zinc powder production technology, and in particular to a multi-stage evaporator-condenser for spherical zinc powder production. Background Technology

[0002] Spherical zinc powder, as an important functional powder material, has been widely used in fields such as zinc-rich anti-corrosion coatings, powder metallurgy, chemical catalysis, pharmaceutical synthesis, and electronic materials due to its unique spherical structure, high specific surface area, and excellent electrical and thermal conductivity.

[0003] Currently, the mainstream method for preparing spherical zinc powder in industry is the evaporation-condensation method. Its basic principle is to heat metallic zinc to above the boiling point to vaporize it and form zinc vapor. Then, an inert gas is used as a carrier gas to transport the zinc vapor to the condensation chamber. By controlling process parameters such as condensation temperature and gas flow rate, the zinc vapor is uniformly nucleated in the gas phase and grows into spherical particles.

[0004] However, in existing evaporation and condensation equipment, the spherical zinc powder obtained after condensation and precipitation has a wide particle size range, and powders of different sizes are easily mixed during collection, resulting in a dispersed product particle size distribution. Subsequent complex grading and sieving processes are required to obtain a narrow-size product that meets the requirements. This not only increases energy consumption and costs in the production process, but also causes surface damage to some spherical particles or generates fine dust due to mechanical collisions during sieving, affecting product quality and causing material loss.

[0005] Therefore, in order to address the above problems, the applicant needs to design a multi-stage evaporator and condenser for the production of spherical zinc powder. Summary of the Invention

[0006] This application provides a multi-stage evaporator-condenser for the production of spherical zinc powder, including a protective box with a cold water pool inside. A support is fixedly mounted on the top surface of the cold water pool, and an evaporator, a condensation mechanism, a spraying mechanism, and a circulation mechanism are mounted on the support. The condensation mechanism includes a mounting shell, and a condensing tube is fixedly mounted inside the mounting shell. A primary precipitation tube and a secondary precipitation tube are connected to the condensing tube, and the primary and secondary precipitation tubes have different inner diameters, thus precipitating spherical zinc powder of different diameters. A connecting pipe is fixedly connected below both the primary and secondary precipitation tubes, and the output end of each connecting pipe is connected to a buffer assembly for storing the spherical zinc powder. The buffer assembly includes a buffer hopper threadedly connected to the connecting pipe via a threaded sleeve. An auxiliary seat is threaded at the bottom of the buffer hopper. A spiral component is rotatably mounted on the inner side of the auxiliary seat. The rotation of the spiral component draws air from the inside of the buffer hopper through the filter plate, creating negative pressure. A filter plate is detachably installed on the inner side of the buffer hopper in a horizontal direction. A conical shell is mounted above the filter plate. A spring is fixedly mounted on the inner top surface of the conical shell and is fixedly connected to the filter plate. The auxiliary seat is connected to a spraying mechanism, which drives the spiral component to rotate via water power. The inlet end of the condenser tube is connected to the evaporator to provide the condenser tube with a material containing inert gas. The outlet end of the condenser tube is connected to a circulation mechanism to purify the inert gas output from the condenser tube. The circulation mechanism is connected to the evaporator to transport the inert gas into the evaporator.

[0007] Preferably, the spraying mechanism includes a water pump, which is fixedly connected to a support. The water pump's inlet end is fixedly connected to a suction pipe, and the end of the suction pipe away from the water pump extends to the inside of the cold water tank. The water pump's outlet end is fixedly connected to a water supply pipe, and the outlet end of the water supply pipe is fixedly connected to a buffer tank. The bottom surface of the buffer tank is connected to a spray head, which is used to spray cold water onto the condenser pipe. By uniformly spraying cold water onto the condenser pipe through the spraying mechanism, the condensation efficiency can be effectively improved and the temperature stability of the condensation process can be guaranteed.

[0008] Preferably, a fixing plate is fixedly installed on the outer side of the buffer compartment, and a support plate is fixedly installed on the bottom surface of the fixing plate. The support plate is fixedly connected to the outer wall of the cold water pool. The buffer compartment is stably installed on the outer wall of the cold water pool by using the fixing plate and the support plate, which enhances the overall structural stability of the spraying mechanism.

[0009] Preferably, the circulation mechanism includes a spray tower fixedly connected to the support, and a circulation box is connected to the outside of the spray tower. An exhaust pipe is fixedly connected to one side of the circulation box, and the exhaust pipe is fixedly connected to the condenser pipe. A collection pipe is also fixedly connected to one side of the circulation box, and the collection pipe is connected to the buffer component. The circulation mechanism purifies the inert gas through the spray tower and the circulation box, realizing the recycling of the inert gas and reducing production costs.

[0010] Preferably, the buffer component further includes a drainage pipe fixedly connected to the auxiliary seat, and the end of the drainage pipe away from the auxiliary seat is fixedly connected to the collecting pipe. An extension pipe is fixedly connected to one side of the auxiliary seat, and the end of the extension pipe away from the auxiliary seat is fixedly connected to the buffer chamber. The extension pipe in the buffer component uses hydraulic power to drive the spiral component to rotate and generate negative pressure to assist in powder collection. At the same time, the drainage pipe circulates wastewater to the collecting pipe, thereby improving resource utilization efficiency.

[0011] Preferably, the evaporator includes an evaporation cylinder, which is fixedly connected to a support. A conveying pipe is fixedly connected to the top surface of the evaporation cylinder, and the conveying pipe is fixedly connected to a condenser pipe. An inert gas input pipe is fixedly connected to one side of the evaporation cylinder, and the inert gas input pipe is connected to an external gas source for replenishing inert gas into the evaporation cylinder. The evaporator replenishes fresh inert gas through the inert gas input pipe, ensuring continuous and stable operation of the evaporation and conveying process.

[0012] Preferably, a demister is provided on the top side of the spray tower, and the top surface of the demister is connected to an inert gas circulation pipe. The outlet end of the inert gas circulation pipe is connected to the evaporation cylinder for inputting dry inert gas into the evaporation cylinder. The demister on the top side of the spray tower removes moisture from the gas and, together with the inert gas circulation pipe, inputs dry inert gas into the evaporator, which is beneficial for resource reuse.

[0013] Preferably, the bottom surface of the auxiliary seat is provided with a fixing frame, and the fixing frame is fixedly connected to the cold water pool. The fixing frame on the bottom surface of the auxiliary seat is fixedly connected to the cold water pool, which improves the installation firmness and working stability of the buffer component.

[0014] Preferably, the cold water tank is connected to an inlet pipe and an outlet pipe, and the inlet pipe and outlet pipe are used together to replace the cold water in the cold water tank, which facilitates quick replacement of cooling water and ensures the cooling effect during long-term operation.

[0015] Preferably, the top surface of the protective box is provided with an exhaust fan, and the outside of the exhaust fan is provided with a protective shell, which is fixedly connected to the protective box. The exhaust fan is used to exhaust internal heat and water vapor, and together with the protective shell, it plays a safety protection role and improves the operating environment of the equipment.

[0016] This invention provides a multi-stage evaporator and condenser for the production of spherical zinc powder, which, compared with existing technologies, offers the following advantages: This multi-stage evaporator-condenser for producing spherical zinc powder utilizes primary and secondary precipitation tubes with different inner diameters on the condenser tubes. By leveraging the varying effects of these different diameter tubes on the zinc vapor flow characteristics, it achieves online classification and separation of spherical zinc powder of different particle sizes during condensation, avoiding the cumbersome process of mixing and precipitation followed by offline sieving in traditional methods. Simultaneously, the buffer assembly incorporates an auxiliary feeding structure driven by a hydraulically operated screw mechanism that generates negative pressure through a filter plate. This utilizes the hydraulic energy of the spray mechanism instead of an additional power source, creating a stable negative pressure environment within the buffer hopper. This actively guides the zinc powder smoothly through the filter plate into the collection container below, effectively preventing powder bridging and clogging, and achieving continuous and stable graded collection.

[0017] This multi-stage evaporator-condenser for spherical zinc powder production connects the spraying mechanism, circulation mechanism, and evaporator in a closed loop. Utilizing cooling water from a cold water tank, it simultaneously meets the dual requirements of spray cooling of the condenser tubes and hydraulically driven spiral components of the buffer assembly. The condensed inert gas is purified by a spray tower and dried by a demister before being directly returned to the evaporator for reuse. This forms a tiered and closed-loop system for water and gas, saving water resources and inert gas consumption, reducing operating costs, and preventing the direct discharge of dust-laden waste gas. Furthermore, the combination of the spray tower and demister ensures the cleanliness and dryness of the circulating inert gas, thereby stabilizing the gaseous transport environment of zinc vapor and further improving the particle size uniformity and sphericity of the spherical zinc powder, achieving efficient, energy-saving, and environmentally friendly continuous production. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the device of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the three-dimensional structure of the device of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the connection structure between the evaporator, condensation mechanism, spraying mechanism, and circulation mechanism of the present invention; Figure 4 This is a three-dimensional structural diagram of the evaporator of the present invention; Figure 5 This is a three-dimensional structural diagram of the condensation mechanism of the present invention; Figure 6 This is a schematic diagram of the cache component structure of the present invention; Figure 7 This is a three-dimensional structural diagram of the spraying mechanism of the present invention; Figure 8 This is a three-dimensional structural diagram of the circulation mechanism of the present invention; Figure 9 This is a schematic diagram of the external structure of the overall device of the present invention.

[0020] icon: 1. Protective enclosure; 2. Cold water tank; 3. Support frame; 4. Evaporator; 5. Condensation mechanism; 6. Spraying mechanism; 7. Circulation mechanism; 8. Exhaust fan; 9. Protective shell; 21. Inlet pipe; 22. Outlet pipe; 41. Evaporator; 42. Delivery pipe; 43. Inert gas input pipe; 51. Mounting shell; 52. Condensation tube; 53. Primary precipitation tube; 54. Secondary precipitation tube; 55. Connecting pipe; 56. Buffer assembly; 57. Fixing frame; 58. Exhaust pipe 61. Water pump; 62. Suction pipe; 63. Water supply pipe; 64. Buffer tank; 65. Spray head; 66. Fixing plate; 67. Support plate; 71. Spray tower; 72. Circulation tank; 73. Demister; 74. Inert gas circulation pipe; 75. Manifold; 561. Extension pipe; 562. Drainage pipe; 563. Auxiliary seat; 564. Buffer hopper; 565. Spiral component; 566. Filter plate; 567. Conical shell; 568. Spring. Detailed Implementation

[0021] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0022] Please refer to Figures 1 to 9 This embodiment provides a multi-stage evaporator-condenser for the production of spherical zinc powder, including a protective box 1. A cold water tank 2 is located inside the protective box 1, and a support 3 is fixedly mounted on the top surface of the cold water tank 2. An evaporator 4, a condensation mechanism 5, a spraying mechanism 6, and a circulation mechanism 7 are mounted on the support 3. During operation, the evaporator 4 heats and vaporizes metallic zinc, and the resulting zinc vapor enters the condensation mechanism 5 under the influence of an inert gas. The spraying mechanism 6 uses cooling water from the cold water tank 2 to spray and cool the condensation tubes 52, causing the zinc vapor to condense and precipitate into spherical zinc powder. The circulation mechanism 7 purifies the exhaust gas and returns it to the evaporator 4 for reuse, thus forming a continuous production system integrating evaporation, staged condensation, gas-solid separation, and gas purification, effectively improving production efficiency and reducing energy consumption.

[0023] The condensation mechanism 5 includes a mounting shell 51, within which a condenser tube 52 is fixedly installed. The condenser tube 52 is connected to a primary precipitation tube 53 and a secondary precipitation tube 54, which have different inner diameters. Because the settling behavior of spherical zinc powder of different particle sizes in the gas phase varies significantly, smaller particle sizes require longer residence times and lower flow rates for effective precipitation. Therefore, by using the primary precipitation tube 53 with a smaller inner diameter, larger particle sizes of zinc powder settle preferentially, while the secondary precipitation tube 54 with a larger inner diameter allows smaller particle sizes to precipitate subsequently. This achieves the purpose of direct graded collection during the condensation process. This avoids the drawbacks of traditional processes where powders of all sizes are mixed before complex sieving, reduces surface damage and fine dust caused by mechanical collisions, improves product quality, and reduces energy consumption and costs in subsequent grading processes.

[0024] Both the primary precipitation tube 53 and the secondary precipitation tube 54 are fixedly connected to a connecting pipe 55 at their lower ends. The output end of each connecting pipe 55 is connected to a buffer assembly 56 for storing spherical zinc powder. The buffer assembly 56 includes a buffer hopper 564, which is threadedly connected to the connecting pipe 55 via a threaded sleeve for easy disassembly and replacement. An auxiliary seat 563 is threadedly installed below the buffer hopper 564. A screw 565 is rotatably mounted on the inner side of the auxiliary seat 563. A filter plate 566 is horizontally detachable and installed on the inner side of the buffer hopper 564. A conical shell 567 is positioned above the filter plate 566. A spring 569 is fixedly mounted on the inner top surface of the conical shell 567 and is fixedly connected to the filter plate 566. The auxiliary seat 563 is connected to the spraying mechanism 6. The conical shell 567 has a tapered structure that is narrower at the bottom and wider at the top, which facilitates buffering the downward impact of the spherical zinc powder.

[0025] During operation, a portion of the cooling water from the spraying mechanism 6 enters the auxiliary seat 563 through the extension pipe 561, using hydraulic power to drive the spiral component 565 to rotate. As the spiral component 565 rotates, it draws air from the inside of the buffer hopper 564 through the filter plate 566, creating a negative pressure inside the buffer hopper 564. This negative pressure accelerates the spherical zinc powder from the connecting pipe 55 into the buffer hopper 564, preventing powder accumulation and blockage at the outlet of the precipitation pipe. Furthermore, it causes slight adsorption of the powder as the airflow passes through the filter plate 566, improving collection efficiency. Utilizing the system's own hydraulic resources to drive the negative pressure generating device eliminates the need for an additional vacuum pump, saving energy and simplifying maintenance. Simultaneously, negative pressure collection avoids forced mechanical vibration, reducing the risk of powder breakage. When the buffer hopper 564 is disassembled, the pressure created by the air passing through the filter plate 566 easily impacts the spherical zinc powder inside the buffer hopper 564. Under the combined action of the initially elastic spring 568 and external pressure, the conical shell 567 is lifted, sealing the opening of the buffer hopper 564, improving safety and preventing zinc powder waste. In this preferred embodiment, a guide assembly formed by a guide sleeve and a guide rod is further provided between the conical shell 567 and the filter plate 566. The guide assembly facilitates the improvement of the stability of the buffer hopper 564 during lifting and moving.

[0026] The spraying mechanism 6 includes a water pump 61, which is fixedly connected to the bracket 3. The inlet end of the water pump 61 is fixedly connected to a suction pipe 62, and the end of the suction pipe 62 away from the water pump 61 extends to the inner side of the cold water tank 2. The outlet end of the water pump 61 is fixedly connected to a water supply pipe 63, and the outlet end of the water supply pipe 63 is fixedly connected to a buffer chamber 64. A spray head 65 is connected to the bottom surface of the buffer chamber 64, and the spray head 65 is used to spray cold water onto the condenser tube 52. During operation, the water pump 61 lifts the cooling water from the cold water tank 2 to the buffer chamber 64, and then sprays it evenly onto the outer wall of the condenser tube 52 through the spray head 65. Forced convection heat transfer quickly removes the heat released by the condensation of zinc vapor, making the temperature gradient inside the condenser tube 52 controllable.

[0027] To improve the installation stability of the spraying mechanism 6, a fixing plate 66 is fixedly installed on the outer side of the buffer tank 64, and a support plate 67 is fixedly installed on the bottom surface of the fixing plate 66. The support plate 67 is fixedly connected to the outer wall of the cold water tank 2. This structure provides stable support for the buffer tank 64 and the spray head 65 above it, preventing the spray angle from shifting due to the vibration of the water pump 61 and ensuring uniform cooling.

[0028] The circulation mechanism 7 includes a spray tower 71, which is fixedly connected to the support 3. A circulation box 72 is connected to the outside of the spray tower 71, and an exhaust pipe 58 is fixedly connected to one side of the circulation box 72. The exhaust pipe 58 is fixedly connected to the condenser pipe 52, used to guide the inert gas output from the condenser pipe 52 into the circulation box 72. A collecting pipe 75 is also fixedly connected to one side of the circulation box 72, connected to the buffer assembly 56, used to recover the wastewater discharged from the buffer assembly 56. During operation, the inert gas discharged from the condenser pipe 52 carries trace amounts of zinc dust and air impurities. After entering the spray tower 71, it undergoes water washing and demisting treatment to be purified, achieving a closed-loop circulation of the inert gas, reducing the amount of inert gas replenishment, and lowering production costs; at the same time, it avoids direct emission of zinc-containing dust, meeting environmental protection requirements.

[0029] Furthermore, the buffer assembly 56 also includes a drain pipe 562 fixedly connected to the auxiliary seat 563, with one end of the drain pipe 562 away from the auxiliary seat 563 fixedly connected to the manifold 75. An extension pipe 561 is fixedly connected to one side of the auxiliary seat 563, with the end of the extension pipe 561 away from the auxiliary seat 563 fixedly connected to the buffer chamber 64. Thus, after the water pump 61 delivers cold water from the cold water pool 2 to the buffer chamber 64, a portion of the cold water is sprayed out through the spray head 65 to cool the condenser pipe 52, while the other portion enters the auxiliary seat 563 through the extension pipe 561 to drive the spiral component 565 to rotate, then flows through the drain pipe 562 into the manifold 75, and finally returns to the circulation mechanism 7 for processing. The cooling water is utilized in a cascade manner, first used to drive the negative pressure device, and then recycled to the spray tower, thus avoiding water energy waste; simultaneously, the drainage from the auxiliary seat 563 is combined with the circulation system of the spray tower 71, simplifying the piping layout.

[0030] The evaporator 4 includes an evaporator cylinder 41, which is fixedly connected to the support 3. A delivery pipe 42 is fixedly connected to the top surface of the evaporator cylinder 41, and the delivery pipe 42 is fixedly connected to the inlet end of the condenser tube 52, for supplying zinc vapor with inert gas to the condenser tube 52. An inert gas inlet pipe 43 is fixedly connected to one side of the evaporator cylinder 41, and the inert gas inlet pipe 43 is connected to an external gas source, for replenishing the evaporator cylinder 41 with inert gas to compensate for unavoidable minor leaks during system operation. This ensures that a positive pressure inert atmosphere is always maintained inside the evaporator, preventing zinc vapor oxidation and ensuring the purity of the spherical zinc powder.

[0031] A demister 73 is installed on the top side of the spray tower 71, and an inert gas circulation pipe 74 is connected to the top surface of the demister 73. Both the spray tower 71 and the demister 73 are existing water washing equipment. The outlet end of the inert gas circulation pipe 74 is connected to the evaporation cylinder 41, and is used to introduce dry and clean inert gas into the evaporation cylinder 41. During operation, the inert gas after being washed by the spray tower 71 contains saturated water vapor. If the moisture is not removed, directly entering the high-temperature evaporation cylinder 41 will cause zinc vapor oxidation or affect the evaporation efficiency. The demister 73 adopts a wire mesh or baffle structure to effectively remove liquid droplets from the gas, thereby ensuring that the inert gas returned to the evaporation cylinder 41 is dry and clean.

[0032] To improve the support stability of the buffer assembly 56, a fixing frame 57 is provided on the bottom surface of the auxiliary seat 563, and the fixing frame 57 is fixedly connected to the cold water tank 2. The fixing frame 57 bears the weight of the auxiliary seat 563, the buffer hopper 564 and the powder inside, avoids stress concentration at the connection between the connecting pipe 55 and the precipitation pipe, and improves the reliability of long-term operation.

[0033] The cold water tank 2 is connected to an inlet pipe 21 and an outlet pipe 22, which are used to replace the cooling water in the cold water tank 2. As the spray cooling proceeds, the water temperature in the cold water tank 2 will gradually rise. When the set upper limit is reached, external cooling water can be introduced through the inlet pipe 21 and hot water can be discharged through the outlet pipe 22 to maintain the water temperature in the cold water tank 2 within the process requirements range.

[0034] An exhaust fan 8 is installed on the top surface of the protective box 1, and a protective shell 9 is installed on the outside of the exhaust fan 8. The protective shell 9 is fixedly connected to the protective box 1. The exhaust fan 8 is used to exhaust the hot air and water vapor accumulated inside the protective box 1 due to equipment heat dissipation and pipe heat transfer, maintaining a suitable operating environment inside the box. At the same time, the protective shell 9 prevents foreign objects from falling in and personnel from accidentally touching it.

[0035] In summary, when the multi-stage evaporator and condenser for the production of spherical zinc powder is in use, the evaporator 4 heats the metallic zinc to vaporization. The generated zinc vapor is carried by inert gas and enters the condenser tube 52 through the conveying pipe 42. The spraying mechanism 6 continuously sprays cold water into the condenser tube 52, so that the zinc vapor is gradually cooled in the condenser tube 52. Since the inner diameters of the first-stage precipitation tube 53 and the second-stage precipitation tube 54 are different, spherical zinc powder of different particle sizes settles in the two-stage precipitation tubes respectively, and enters the corresponding buffer hopper 564 through the connecting pipe 55. At the same time, the water flow drives the spiral component 565 to rotate, generating negative pressure below the buffer hopper 564, accelerating the collection of powder and preventing blockage. The inert gas enters the circulation mechanism 7 through the exhaust pipe 58, is purified by the spray tower 71 and dehumidified by the demister 73, and is sent back to the evaporator 41 for recycling through the inert gas circulation pipe 74.

[0036] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A multi-stage evaporator and condenser for the production of spherical zinc powder, characterized in that: The system includes a protective box (1), and a cold water tank (2) is provided inside the protective box (1). A support (3) is fixedly provided on the top surface of the cold water tank (2), and an evaporator (4), a condensing mechanism (5), a spraying mechanism (6), and a circulation mechanism (7) are provided on the support (3). The condensing mechanism (5) includes a mounting shell (51), and a condensing pipe (52) is fixedly provided inside the mounting shell (51). A primary precipitation pipe (53) and a secondary precipitation pipe (54) are connected to the condensing pipe (52), and the primary precipitation pipe... The inner diameters of the primary precipitator (53) and the secondary precipitator (54) are different, resulting in the precipitation of spherical zinc powder of different diameters. A connecting pipe (55) is fixedly connected to the bottom of both the primary precipitator (53) and the secondary precipitator (54), and the output end of the connecting pipe (55) is connected to a buffer assembly (56) for storing the spherical zinc powder. The buffer assembly (56) includes a buffer hopper (564) threadedly connected to the connecting pipe (55) via a threaded sleeve. An auxiliary seat (56) is threadedly provided below the buffer hopper (564). 3) A spiral component (565) is rotatably provided on the inner side of the auxiliary seat (563), and the rotation of the spiral component (565) will draw air from the inside of the buffer hopper (564) through the filter plate (566) to generate negative pressure. The filter plate (566) is detachably installed on the inner side of the buffer hopper (564) in the horizontal direction, and a conical shell (567) is provided above the filter plate (566). A spring (569) is fixedly provided on the inner top surface of the conical shell (567), and the spring (569) and the filter plate (566) are connected. The auxiliary seat (563) is connected to the spraying mechanism (6) and the spiral component (565) is rotated by water power. The inlet end of the condenser (52) is connected to the evaporator (4) to provide the condenser (52) with the precipitated material containing inert gas. The outlet end of the condenser (52) is connected to the circulation mechanism (7) to purify the inert gas output by the condenser (52). The circulation mechanism (7) is connected to the evaporator (4) to transport the inert gas into the evaporator (4).

2. The multi-stage evaporator and condenser for the production of spherical zinc powder according to claim 1, characterized in that: The spraying mechanism (6) includes a water pump (61), and the water pump (61) is fixedly connected to the bracket (3). The water inlet end of the water pump (61) is fixedly connected to a water suction pipe (62), and the end of the water suction pipe (62) away from the water pump (61) extends to the inside of the cold water pool (2). The water outlet end of the water pump (61) is fixedly connected to a water supply pipe (63), and the water outlet end of the water supply pipe (63) is fixedly connected to a buffer chamber (64). The bottom surface of the buffer chamber (64) is connected to a spray head (65), and the spray head (65) is used to spray cold water onto the condenser pipe (52).

3. A multi-stage evaporator and condenser for the production of spherical zinc powder according to claim 2, characterized in that: A fixing plate (66) is fixedly installed on the outside of the buffer compartment (64), and a support plate (67) is fixedly installed on the bottom surface of the fixing plate (66), and the support plate (67) is fixedly connected to the outer wall of the cold water pool (2).

4. A multi-stage evaporator and condenser for the production of spherical zinc powder according to claim 3, characterized in that: The circulation mechanism (7) includes a spray tower (71) fixedly connected to the support (3), and a circulation box (72) is connected to the outside of the spray tower (71). An exhaust pipe (58) is fixedly connected to one side of the circulation box (72), and the exhaust pipe (58) is fixedly connected to the condenser pipe (52). A manifold (75) is also fixedly connected to one side of the circulation box (72), and the manifold (75) is connected to the buffer assembly (56).

5. A multi-stage evaporator and condenser for the production of spherical zinc powder according to claim 4, characterized in that: The cache component (56) also includes a drainage pipe (562) fixedly connected to the auxiliary seat (563), and the end of the drainage pipe (562) away from the auxiliary seat (563) is fixedly connected to the manifold (75). An extension pipe (561) is fixedly connected to one side of the auxiliary seat (563), and the end of the extension pipe (561) away from the auxiliary seat (563) is fixedly connected to the cache compartment (64).

6. A multi-stage evaporator and condenser for the production of spherical zinc powder according to claim 4, characterized in that: The evaporator (4) includes an evaporator cylinder (41), and the evaporator cylinder (41) is fixedly connected to the support (3). The top surface of the evaporator cylinder (41) is fixedly connected to a conveying pipe (42), and the conveying pipe (42) is fixedly connected to a condenser pipe (52). One side of the evaporator cylinder (41) is fixedly connected to an inert gas input pipe (43), and the inert gas input pipe (43) is connected to an external gas source for supplementing inert gas into the evaporator cylinder (41).

7. A multi-stage evaporator and condenser for the production of spherical zinc powder according to claim 6, characterized in that: The top side of the spray tower (71) is provided with a demister (73), and the top surface of the demister (73) is connected to an inert gas circulation pipe (74). The outlet end of the inert gas circulation pipe (74) is connected to the evaporator (41) for inputting dry inert gas into the evaporator (41).

8. A multi-stage evaporator and condenser for the production of spherical zinc powder according to claim 1, characterized in that: The bottom surface of the auxiliary seat (563) is provided with a fixing frame (57), and the fixing frame (57) is fixedly connected to the cold water pool (2).

9. A multi-stage evaporator and condenser for the production of spherical zinc powder according to claim 1, characterized in that: The cold water tank (2) is connected to an inlet pipe (21) and an outlet pipe (22), and the inlet pipe (21) and the outlet pipe (22) are used to replace the cold water in the cold water tank (2).

10. A multi-stage evaporator and condenser for the production of spherical zinc powder according to claim 1, characterized in that: The top surface of the protective box (1) is provided with an exhaust fan (8), and the outside of the exhaust fan (8) is provided with a protective shell (9), and the protective shell (9) is fixedly connected to the protective box (1).

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