A high-efficiency solid-liquid separation device for continuous crystallization of sodium dichromate

Abstract

This utility model belongs to the technical field of solid-liquid separation devices, specifically relating to a high-efficiency solid-liquid separation device for continuous crystallization of sodium dichromate. It includes a tank body with a tank cover and multiple feed inlets. A support cylinder is located on the top of the tank cover, and a motor is mounted on the support cylinder. The motor output shaft is connected to a stirring assembly. The stirring assembly includes a stirring shaft connected to the motor, a stirring paddle on the stirring shaft, and a stirring crossbar connected to the upper side of the stirring paddle. A heating tank is located outside the tank body, and an insulation tank is located outside the heating tank. A discharge port is located at the bottom of the tank body, and a butterfly valve is located below the discharge port. A filter assembly is located below the butterfly valve. This utility model integrates a crystallization tank and a filter assembly, and through control of the discharge port and the butterfly valve, it achieves direct filtration after crystallization without material transfer, enabling continuous production.

Description

Technical Field

[0001] This utility model belongs to the technical field of solid-liquid separation devices, specifically relating to a high-efficiency solid-liquid separation device for continuous crystallization of sodium dichromate. Background Technology

[0002] In sodium dichromate production, crystallization and solid-liquid separation are crucial steps. Existing equipment suffers from the following drawbacks: crystallization and separation are carried out in separate steps, requiring multiple material transfers, resulting in low efficiency and easy crystal loss; uneven heating leads to excessively high local supersaturation and uneven crystal particle size; the filter components are cumbersome to disassemble and assemble, making crystal removal difficult and cleaning inconvenient; the stirring components lack a wall-scraping structure, allowing crystals to easily adhere to the tank walls, affecting crystallization efficiency. Therefore, an integrated device that can achieve continuous crystallization, efficient separation, and easy operation is needed. Utility Model Content

[0003] In view of the above-mentioned shortcomings in the prior art, the present invention provides a high-efficiency solid-liquid separation device for continuous crystallization of sodium dichromate, so as to solve the problems in the background art.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A high-efficiency solid-liquid separation device for continuous crystallization of sodium dichromate includes a tank body with a tank cover. The tank cover has multiple feed inlets, and a pressure port is located on one side of each feed inlet. A support cylinder is located on the top of the tank cover, and a motor is mounted on the support cylinder. The output shaft of the motor is connected to a stirring assembly. The stirring assembly includes a stirring shaft connected to the motor, a stirring paddle on the stirring shaft, and a stirring crossbar connected to the upper side of the stirring paddle. A heating tank is located outside the tank body, and an insulation tank is located outside the heating tank. A discharge port is located at the bottom of the tank body, and a butterfly valve is located below the discharge port. A filter assembly is located below the butterfly valve.

[0006] Furthermore, the filter assembly includes a filter box, a filter screen inside the filter box, a box cover on one side of the filter box, a crystal extraction port on the box cover, a water inlet on the upper side of the filter screen, a water outlet on the lower side of the filter screen, and the water inlet is connected to a butterfly valve.

[0007] Furthermore, the insulated tank is provided with support plates on both sides, an insulated pipe on one side of the insulated tank, and an observation window on the tank cover.

[0008] Furthermore, the heating tank is provided with a heat inlet pipe on the upper side and a heat outlet pipe on the lower side, and the motor is bolted to the support frame.

[0009] Furthermore, the stirring paddle is L-shaped, the stirring crossbar is fixedly connected to the stirring shaft, and both the stirring paddle and the stirring crossbar are made of stainless steel.

[0010] Furthermore, the crystal extraction port and the box cover are connected by a quick-release mechanism, the crystal extraction port is provided with a glass observation port, and the box cover and the filter box are sealed together by a sealing ring.

[0011] Furthermore, the stirring paddle and the stirring shaft are inclined at an angle of 30-45 degrees, and a scraper is provided on the lower side of the stirring paddle, with a gap of 1.0±0.5mm between the scraper and the inner wall of the tank.

[0012] Furthermore, the insulated tank is equipped with a temperature monitor, the heating tank is equipped with a temperature monitor, and the inner wall of the tank is made of stainless steel.

[0013] Compared with the prior art, this utility model has the following advantages:

[0014] 1. The crystallizer and filter assembly are integrated and controlled by the discharge port and butterfly valve to achieve direct filtration after crystallization without material transfer, thus enabling continuous production;

[0015] 2. The tank body is equipped with a double-layer structure of heating tank and heat preservation tank on the outside. With the help of temperature monitoring device, the internal temperature of the tank can be accurately controlled (fluctuation ≤ ±2℃) to avoid local oversaturation crystallization; the filter component has a built-in filter screen to improve the crystal retention rate, and the crystal removal port adopts a quick-release structure for easy crystal removal.

[0016] 3. The tank cover is equipped with an observation window to observe the crystallization state in real time. The stirring assembly adopts an L-shaped stirring paddle combined with a crossbar, which improves the uniformity of stirring and avoids crystal deposition. The stirring components are made of stainless steel, and the filter box and the box cover are sealed with a sealing ring to adapt to the highly corrosive environment of sodium dichromate and extend the service life of the equipment. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of a high-efficiency solid-liquid separation device for continuous crystallization of sodium dichromate according to the present invention.

[0018] Figure 2 This is a cross-sectional view of a high-efficiency solid-liquid separation device for continuous crystallization of sodium dichromate according to the present invention.

[0019] Figure 3 This is a schematic diagram of the stirring assembly structure;

[0020] Figure 4 This is a schematic diagram of the filter components;

[0021] The reference numerals in the accompanying drawings of the instruction manual include: 1. Tank body; 2. Tank cover; 21. Feed inlet; 22. Observation window; 23. Air pressure port; 3. Support frame; 4. Motor; 41. Support cylinder; 5. Stirring assembly; 51. Stirring shaft; 52. Stirring paddle; 53. Stirring crossbar; 6. Filter assembly; 61. Filter box; 62. Filter screen; 63. Crystal extraction port; 64. Water inlet; 65. Water outlet; 66. Tank cover; 7. Butterfly valve; 8. Heat outlet pipe; 9. Heat inlet pipe; 10. Insulation pipe; 11. Insulation tank; 12. Heating tank; 13. Support plate; 14. Discharge port. Detailed Implementation

[0022] To enable those skilled in the art to better understand this utility model, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of this utility model, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0024] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0025] In the description of this utility model, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating the connection relationship between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Example 1:

[0027] like Figure 1As shown in the figure, this utility model discloses a high-efficiency solid-liquid separation device for continuous crystallization of sodium dichromate, including a tank body 1, a tank cover 2 on the tank body 1, multiple feed inlets 21 on the tank cover 2, a pressure port 23 on one side of the feed inlet 21, a support cylinder 41 on the top of the tank cover 2, a motor 4 on the support cylinder 41, a stirring assembly 5 connected to the output shaft of the motor 4, a stirring shaft 51 connected to the motor 4, a stirring paddle 52 on the stirring shaft 51, a stirring crossbar 53 connected to the upper side of the stirring paddle 52, a heating tank 12 on the outside of the tank body 1, a heat preservation tank 11 on the outside of the heating tank 12, a discharge port 14 at the bottom of the tank body 1, a butterfly valve 7 on the lower side of the discharge port 14, and a filter assembly 6 on the lower side of the butterfly valve 7.

[0028] Specifically, the tank body is equipped with a double-layer structure consisting of a heating tank and an insulation tank on the outside. With the help of a temperature monitor, the temperature inside the tank can be precisely controlled to avoid local oversaturation and crystallization.

[0029] The filter assembly 6 includes a filter box 61, a filter screen 62 inside the filter box 61, a cover 66 on one side of the filter box 61, a crystal extraction port 63 on the cover 66, a water inlet 64 on the upper side of the filter screen 62, and a water outlet 65 on the lower side of the filter screen 62. The water inlet 64 is connected to a butterfly valve 7. Specifically, the filter assembly has a built-in filter screen to improve the crystal retention rate, and the crystal extraction port adopts a quick-release structure for easy crystal removal.

[0030] The insulated tank 11 has support plates 13 on both sides, an insulation pipe 10 on one side, and an observation window 22 on the tank cover 2. Specifically, the observation window on the tank cover allows for real-time observation of the crystallization state.

[0031] The upper side of the heating tank 12 is provided with a heat inlet pipe 9, and the lower side of the heating tank 12 is provided with a heat outlet pipe 8. The motor 4 is bolted to the support frame 3.

[0032] The stirring paddle 52 is L-shaped, and the stirring crossbar 53 is fixedly connected to the stirring shaft 51. Both the stirring paddle 52 and the stirring crossbar 53 are made of stainless steel. Specifically, the stirring assembly uses an L-shaped stirring paddle and crossbar combination, which improves the uniformity of stirring and avoids crystal deposition. The stirring components are made of stainless steel, which is suitable for the highly corrosive environment of sodium dichromate.

[0033] The crystal extraction port 63 and the cover 66 are connected by a quick-release mechanism. The crystal extraction port 63 is equipped with a glass observation port. The cover 66 and the filter box 61 are connected by a sealing ring.

[0034] The stirring paddle 52 and the stirring shaft 51 are inclined at an angle of 30-45 degrees. A scraper is provided on the lower side of the stirring paddle 52, and the gap between the scraper and the inner wall of the tank 1 is 1.0±0.5mm. Specifically, the gap between the scraper and the inner wall of the tank is 1.0±0.5mm to prevent crystals from adhering to the tank wall.

[0035] Temperature monitors are installed inside both the insulation tank 11 and the heating tank 12. The inner wall of the tank body 1 is made of stainless steel. Specifically, the stainless steel inner wall of the tank is designed to withstand the highly corrosive environment of sodium dichromate, thus extending the equipment's lifespan.

[0036] Operating principle: Sodium dichromate solution continuously enters tank 1 through inlet 21 of tank cover 2, and nitrogen is introduced through pressure port 23 to maintain a slight positive pressure inside the tank; the heating medium heat transfer oil enters heating tank 12 through heat inlet pipe 9, and the temperature of tank 1 is controlled by temperature monitor 15, and heat preservation tank 11 and heat preservation pipe 10 reduce heat loss.

[0037] Motor 4 drives stirring shaft 51 to rotate. L-shaped stirring paddle 52 is tilted at 35 degrees and works with stirring crossbar 53 to stir the solution. Scraper 54 cleans crystals adhering to the tank wall in real time. The crystallization status is monitored through observation window 22. The crystallized material enters filter assembly 6 through discharge port 14 and butterfly valve 7. Filter screen 62 traps crystals, and mother liquor is discharged through water outlet 65 (the discharged mother liquor can return to the tank through other inlet 21 and be cleaned by rotating stirring shaft 51). The amount of crystal accumulation is viewed through the glass observation port 63. The quick-release crystal collection port is opened to collect crystals. Butterfly valve 7 is closed, filter assembly is detached, and hot water is introduced through water inlet 64 to clean filter screen 62. Wastewater is discharged through water outlet 65, and tank cover 66 can be removed for filter screen replacement.

[0038] The above are merely embodiments of this utility model. The circuits, electronic components, and modules involved are all prior art, fully achievable by those skilled in the art, and require no further explanation. The content protected by this application does not involve improvements to the software and methods. Commonly known structures and characteristics in the solution are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field to which this utility model pertains prior to the application date or priority date, are able to access all existing technologies in that field, and possess the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, under the guidance of this application, improve and implement this solution in conjunction with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent.

Claims

1. A high-efficiency solid-liquid separation device for continuous crystallization of sodium dichromate, characterized in that: The container includes a tank body (1), a tank cover (2) on the tank body (1), a plurality of feed inlets (21) on the tank cover (2), a pressure port (23) on one side of the feed inlet (21), a support cylinder (41) on the top of the tank cover (2), a motor (4) on the support cylinder (41), the output shaft of the motor (4) is connected to a stirring assembly (5), the stirring assembly (5) includes a stirring shaft (51) connected to the motor (4), a stirring paddle (52) on the stirring shaft (51), a stirring crossbar (53) connected to the upper side of the stirring paddle (52), a heating tank (12) on the outside of the tank body (1), a heat preservation tank (11) on the outside of the heating tank (12), a discharge port (14) at the bottom of the tank body (1), a butterfly valve (7) on the lower side of the discharge port (14), and a filter assembly (6) on the lower side of the butterfly valve (7).

2. A high efficiency solid-liquid separation device for continuous crystallization of sodium dichromate as claimed in claim 1, wherein: The filter assembly (6) includes a filter box (61), a filter screen (62) is provided inside the filter box (61), a box cover (66) is provided on one side of the filter box (61), a crystal extraction port (63) is provided on the box cover (66), a water inlet (64) is provided on the upper side of the filter screen (62), and a water outlet (65) is provided on the lower side of the filter screen (62). The water inlet (64) is connected to a butterfly valve (7).

3. The high-efficiency solid-liquid separation device for continuous crystallization of sodium dichromate according to claim 1, characterized in that: The insulated tank (11) has support plates (13) on both sides, an insulated pipe (10) on one side, and an observation window (22) on the tank cover (2).

4. The high-efficiency solid-liquid separation device for continuous crystallization of sodium dichromate according to claim 1, characterized in that: The heating tank (12) is provided with a heat inlet pipe (9) on the upper side and a heat outlet pipe (8) on the lower side. The motor (4) is bolted to the support frame (3).

5. A high efficiency solid-liquid separation device for continuous crystallization of sodium dichromate as claimed in claim 1 wherein: The stirring paddle (52) is L-shaped, and the stirring crossbar (53) is fixedly connected to the stirring shaft (51). Both the stirring paddle (52) and the stirring crossbar (53) are made of stainless steel.

6. A high efficiency solid-liquid separation device for continuous crystallization of sodium dichromate as claimed in claim 2 wherein: The crystal extraction port (63) and the box cover (66) are connected by a quick-release mechanism. The crystal extraction port (63) is provided with a glass observation port. The box cover (66) and the filter box (61) are connected by a sealing ring.

7. A high efficiency solid-liquid separation device for continuous crystallization of sodium dichromate as claimed in claim 2 wherein: The stirring paddle (52) is inclined to the stirring shaft (51) at an angle of 30-45 degrees. A scraper is provided on the lower side of the stirring paddle (52), and the gap between the scraper and the inner wall of the tank (1) is 1.0±0.5mm.

8. A high efficiency solid-liquid separation device for continuous crystallization of sodium dichromate as claimed in claim 1 wherein: The insulated tank (11) is equipped with a temperature monitor, the heating tank (12) is equipped with a temperature monitor, and the inner wall of the tank (1) is made of stainless steel.

Images