Solid caustic soda waste dissolving device
By designing a solid alkali waste dissolving device, and utilizing components such as filter plates, stirring blades, and electric heating, the problems of low dissolving efficiency and impurities affecting product quality were solved. This achieved efficient dissolving and impurity removal, protecting equipment and improving product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QINGHAI SALT LAKE HAINA CHEM CO LTD
- Filing Date
- 2025-01-24
- Publication Date
- 2026-05-12
AI Technical Summary
The existing solid alkali waste has low dissolution efficiency, and impurities in the solution are not easy to remove, which affects product quality and damages production equipment.
A solid alkali waste dissolution device was designed, including a tank, a stirring device, and a scraping device. By setting up components such as a filter plate, stirring blades, a guide plate, and an electric heating element, the solid alkali waste can be effectively filtered, stirred, and heated to promote the dissolution process.
It improves the dissolution efficiency of solid alkali waste, effectively removes impurities, prevents equipment damage, and enhances product quality.
Smart Images
Figure CN224221118U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a solid alkali waste dissolving device, and more particularly to the structure of the solid alkali waste dissolving device. Background Technology
[0002] The chlor-alkali industry refers to the chemical industry that uses the electrolysis of saturated sodium chloride solution to produce solid alkali (sodium hydroxide), chlorine, hydrogen, and a series of derivative products. Its products are widely used in the chemical industry, light industry, textile industry, metallurgical industry, and petrochemical industry.
[0003] The production process of solid alkali is as follows: First, 32% liquid alkali is heated and evaporated in a falling film evaporator to concentrate it to a concentration of 60%. Then, it is added to a falling film concentrator, where the alkali solution is indirectly heated by molten salt at a high temperature of 410~430℃ to gradually evaporate and reduce the water content, resulting in a high-concentration sodium hydroxide solution. Next, the high-concentration sodium hydroxide solution is added to a nickel-containing cast iron pot for further evaporation and concentration to obtain molten anhydrous sodium hydroxide. Finally, the molten sodium hydroxide is directly added to a flake machine or granulation tower to produce flake or granular solid alkali.
[0004] During production, some solid alkali waste is generated on the ground due to reasons such as inadequate sealing of the equipment's inlet and outlet, as well as pipe joints, and corrosion damage to the pipes. In addition, some solid alkali waste is also generated during equipment start-up, shutdown, and maintenance. Direct discharge of solid alkali waste will not only pollute the environment but also waste raw materials and increase enterprise costs.
[0005] Existing methods typically involve dissolving solid alkali waste and using it as a working principle to continue solid alkali production. During dissolution, the solid alkali waste and the dissolving solution are placed in a container for automatic dissolution, which has low dissolution efficiency. The solid alkali waste contains solid impurities such as sand and iron filings, which existing containers cannot remove. These solid impurities in the solution can damage subsequent production equipment and affect product quality.
[0006] The purpose of this invention is to solve the problems of low dissolution efficiency of existing solid alkali waste, and the fact that impurities in the solution can easily damage production equipment and affect product quality. Utility Model Content
[0007] To address the aforementioned problems, this utility model provides a solid alkali waste dissolving device, comprising a tank 1 and a stirring device 2. The tank 1 has a feed port 11 and a liquid inlet 12 at the top, and a discharge port 13 at the bottom, forming a dissolving chamber 14 inside. A first filter plate 15 is provided on the feed port 11. The stirring device 2 includes a rotating power mechanism and a stirring rod 22. The rotating power mechanism is located at the top of the tank 1. The upper end of the stirring rod 22 is fixedly connected to the rotating power mechanism, and the lower end extends through the tank 1 into the dissolving chamber 14. Stirring blades 23 are provided on the stirring rod 22.
[0008] This invention utilizes a first filter plate 15 installed at the feed inlet 11 to filter and remove impurities from solid alkali waste. A stirring device 2 is installed to agitate the solid alkali waste and the dissolving solution within the tank 1, promoting mixing and accelerating the dissolution rate of the solid alkali waste. This invention solves the problems of low dissolution efficiency of existing solid alkali waste, difficulty in removing impurities from the solution, damage to production equipment, and impact on product quality.
[0009] Preferably, a second filter plate 16 is provided inside the tank body 1. The second filter plate 16 is horizontally arranged at the bottom of the dissolving chamber 14, below the stirring rod 22, and fixedly connected to the inner wall of the tank body 1. The aperture of the filter holes on the second filter plate 16 is smaller than the aperture of the filter holes on the first filter plate 15.
[0010] By setting a second filter plate 16 at the bottom of the dissolving chamber 14, and setting the aperture of the filter holes on the second filter plate 16 to be smaller than the aperture of the filter holes on the first filter plate 15, the first filter plate 15 can filter and remove larger particles of impurities in the solid alkali waste, and the second filter plate 16 can filter and remove smaller particles of impurities mixed in the dissolved solid alkali waste, thereby removing impurities more cleanly.
[0011] Preferably, it also includes a guide plate 17, which is fixedly disposed on the inner wall of the tank 1 and extends upward in a spiral shape along the rotation direction of the stirring blade 23.
[0012] By setting a guide plate 17 on the inner wall of the tank 1, the solid alkali waste can be promoted to rise along the guide plate 17, preventing the solid alkali waste from accumulating at the bottom of the dissolution chamber 14, thereby improving the dissolution rate.
[0013] Preferably, it also includes a spoiler 18, which is strip-shaped and vertically arranged on the inner wall of the tank 1, located above the guide plate 17.
[0014] The stirring action of the stirring device 2 and the turbulence action of the baffle plate 18 can promote the mixing of solid alkali waste with the dissolving liquid, promote the uniform dispersion of solid alkali waste in the dissolving liquid, and improve the dissolution efficiency of solid alkali waste.
[0015] Preferably, the tank body 1 is provided with a jacket 19, and an electric heating element 6 is provided inside the jacket 19. Since the increase in temperature is conducive to accelerating the dissolution rate of solid alkali waste, the dissolution rate of solid alkali waste can be further improved by heating the dissolving liquid in the tank body 1 to a suitable temperature through the electric heating element 6.
[0016] Preferably, the device further includes a scraping device 3, which includes a scraping rod 31 and a brush 32. The scraping rod 31 is horizontally disposed at the lower end of the stirring rod 22. The brush 32 is fixedly disposed on the bottom surface of the stirring rod 22, and the end of the brush 32 contacts the top surface of the second filter plate 16.
[0017] By setting up a scraping device 3, when the stirring rod 22 rotates, it drives the brush 32 to rotate. The brush 32 can scrape the solid alkali material and impurities on the second filter plate 16 to prevent the second filter plate 16 from clogging.
[0018] Preferably, a thermometer 4 and a hydrometer 5 are installed inside the tank 1. The thermometer 4 can detect the temperature inside the tank 1, thereby controlling the temperature inside the tank 1 within a suitable range. The hydrometer 5 can detect the concentration of the alkali solution after dissolution in the tank 1, ensuring that the concentration of the alkali solution meets the requirements of the production process.
[0019] Preferably, the rotational power mechanism is a rotary motor 21.
[0020] Preferably, an insulation layer is provided on the outside of the tank body 1. By providing an insulation layer on the outside of the tank body 1, heat dissipation from the tank body 1 can be reduced, heat loss can be reduced, thereby increasing the dissolution rate of the solid alkali waste. Attached Figure Description
[0021] Figure 1 Schematic diagram of the overall structure of the solid alkali waste dissolution device;
[0022] Figure 2 Schematic diagram of the internal structure of the tank;
[0023] Figure 3 . Figure 2 Schematic diagram of the cross-sectional structure of the middle AA section;
[0024] Figure 4 . Figure 2 Enlarged diagram of point B in the middle.
[0025] In the diagram, 1. Tank body, 11. Feed port, 12. Liquid inlet, 121. Liquid inlet valve, 13. Discharge port, 131. Discharge valve, 14. Dissolving chamber, 15. First filter plate, 16. Second filter plate, 17. Guide plate, 18. Baffle plate, 19. Jacket, 10. Support leg, 101. Manhole, 2. Stirring device, 21. Rotary motor, 22. Stirring rod, 23. Stirring blade, 3. Scraping device, 31. Scraping rod, 32. Brush, 4. Thermometer, 5. Densitometer, 6. Electric heating element. Detailed Implementation
[0026] The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings.
[0027] like Figure 1 and Figure 2 As shown, the solid alkali waste dissolving device includes a tank 1, a stirring device 2 and a scraping device 3. The top of the tank 1 is provided with a feeding port 11 and a liquid filling port 12, and the bottom is provided with a discharge port 13, forming a dissolving chamber 14 inside.
[0028] The tank body 1 is provided with an openable manhole 101, through which impurities inside the tank body 1 can be cleaned. The bottom of the tank body 1 is provided with support legs 10 to support the tank body 1.
[0029] A first filter plate 15 is installed on the feed port 11. By installing the first filter plate 15 on the feed port 11, impurities in the solid alkali waste can be filtered and removed, preventing impurities from damaging subsequent production equipment and affecting product quality.
[0030] A liquid inlet 12 is equipped with a liquid inlet valve 121. A discharge outlet 13 is equipped with a discharge valve 131.
[0031] A thermometer 4 and a hydrometer 5 are installed inside the tank 1. The thermometer 4 can detect the temperature inside the tank 1, thereby controlling the temperature within the appropriate range. The hydrometer 5 can detect the concentration of the alkali solution after dissolution in the tank 1, ensuring that the concentration of the alkali solution meets the requirements of the production process.
[0032] The stirring device 2 includes a rotating power mechanism and a stirring rod 22. The rotating power mechanism is located at the top of the tank 1. The upper end of the stirring rod 22 is fixedly connected to the rotating power mechanism, and the lower end extends through the tank 1 into the dissolving chamber 14, near the second filter plate 16. Stirring blades 23 are provided on the stirring rod 22. The rotating power mechanism is a rotating motor 21.
[0033] The stirring device 2 can stir the solid alkali waste and the dissolving liquid in the tank 1, promote the mixing of the solid alkali waste and the dissolving liquid, and accelerate the dissolution rate of the solid alkali waste.
[0034] The tank body 1 is equipped with an insulation layer (not shown in the figure). By installing an insulation layer on the outside of the tank body 1, heat dissipation from the tank body 1 can be reduced, heat loss can be reduced, energy consumption can be reduced, and the dissolution rate of solid alkali waste can be increased.
[0035] like Figure 2 and Figure 3 As shown, a second filter plate 16 is provided inside the tank 1. The second filter plate 16 is horizontally arranged in the dissolving chamber 14, located below the stirring rod 22, and is fixedly connected to the inner wall of the tank 1. The aperture of the filter holes on the second filter plate 16 is smaller than the aperture of the filter holes on the first filter plate 15.
[0036] Therefore, the first filter plate 15 can filter and remove larger particles of impurities in the solid alkali waste, and the second filter plate 16 can filter and remove smaller particles of impurities mixed in with the dissolved solid alkali waste, thus removing impurities more cleanly.
[0037] A guide plate 17 and a baffle plate 18 are provided on the inner wall of the tank body 1. The guide plate 17 is fixedly installed on the inner wall of the tank body 1 and extends upward in a spiral shape along the rotation direction of the stirring blade 23. The guide plate 17 can promote the rise of solid alkali waste along the guide plate 17 and prevent solid alkali waste from accumulating at the bottom of the dissolving chamber 14, thereby improving the dissolving speed.
[0038] The spoiler 18 is strip-shaped and vertically installed on the inner wall of the tank 1, located above the guide plate 17.
[0039] The stirring action of the stirring device 2 and the turbulence action of the baffle plate 18 can promote the mixing of solid alkali waste with the dissolving liquid, promote the uniform dispersion of solid alkali waste in the dissolving liquid, and improve the dissolution efficiency of solid alkali waste.
[0040] The tank body 1 is equipped with a jacket 19, and an electric heating element 6 is installed inside the jacket 19. The electric heating element 6 heats the dissolving liquid in the tank body 1 to a suitable temperature, which can further improve the dissolution rate of solid alkali waste.
[0041] The scraping device 3 includes a scraping rod 31 and a brush 32. The scraping rod 31 is horizontally arranged at the lower end of the stirring rod 22. The brush 32 is fixedly arranged on the bottom surface of the stirring rod 22, and the end of the brush 32 contacts the top surface of the second filter plate 16.
[0042] By setting up a scraping device 3, when the stirring rod 22 rotates, it drives the brush 32 to rotate. The brush 32 can scrape the solid alkali material and impurities on the second filter plate 16 to prevent the second filter plate 16 from clogging.
[0043] In practical application, the dissolving liquid (such as solid alkali condensate generated in a solid alkali production system) is added into the dissolving chamber 14 through the liquid inlet 12. Solid alkali waste is evenly added into the dissolving chamber 14 through the feed inlet 11. Large particulate impurities in the solid alkali waste are filtered through the first filter plate 15. The electric heating element 6 is turned on to heat the dissolving liquid to a suitable temperature. The stirring motor is turned on, and the stirring blades 23 are used to stir the dissolving liquid and solid alkali waste, promoting mixing and preventing the solid alkali waste from accumulating on the second filter plate 16. The concentration of the alkali solution is monitored in real time by the densitometer 5. When the concentration reaches the production requirements, the discharge valve 131 is opened to discharge the alkali solution from the discharge port 13. Small particulate impurities in the solid alkali waste are filtered by the second filter plate 16.
[0044] This invention, by incorporating a stirring device 2, can agitate the solid alkali waste and the dissolving liquid within the tank 1, promoting mixing and accelerating the dissolution rate of the solid alkali waste. This invention solves the problems of low dissolution efficiency of existing solid alkali waste, difficulty in removing impurities, damage to production equipment, and impact on product quality.
[0045] By installing a first filter plate 15 at the feed inlet and a second filter plate 16 at the bottom of the dissolving chamber 14, the first filter plate 15 can filter and remove larger particles of impurities in the solid alkali waste, while the second filter plate 16 can filter and remove smaller particles of impurities mixed in with the dissolved solid alkali waste, thus achieving cleaner impurity removal. A scraping device 3 is installed, which drives the brush 32 to rotate when the stirring rod 22 rotates. The brush 32 can scrape the solid alkali material and impurities on the second filter plate 16 to prevent the second filter plate 16 from clogging.
[0046] The stirring action of the stirring device 2 and the turbulence action of the baffle plate 18 can promote the mixing of solid alkali waste and the dissolving liquid, promote the uniform dispersion of solid alkali waste in the dissolving liquid, and improve the dissolution efficiency of solid alkali waste. Since the higher the temperature, the faster the dissolution rate of solid alkali waste, the dissolution rate of solid alkali waste can be further improved by heating the dissolving liquid in the tank 1 to a suitable temperature.
[0047] It should be noted that the above embodiments are illustrative of the present invention and not intended to limit the present invention.
Claims
1. A solid caustic waste dissolving apparatus, characterized by, It comprises a tank body (1) and a stirring device (2), The tank body (1) is provided with a feeding port (11) and a liquid feeding port (12) on the top, a discharging port (13) on the bottom, and a dissolving cavity (14) formed inside; A first filter plate (15) is arranged on the feeding port (11); The stirring device (2) comprises a rotating power mechanism and a stirring rod (22), and the rotating power mechanism is arranged on the top of the tank body (1); The upper end of the stirring rod (22) is fixedly connected with the rotating power mechanism, and the lower end extends into the dissolving cavity (14) through the tank body (1), and the stirring rod (22) is provided with stirring blades (23), and the tank body (1) is provided with a second filter plate (16), The second filter plate (16) is horizontally arranged on the bottom of the dissolving cavity (14) and below the stirring rod (22), and is fixedly connected with the inner wall of the tank body (1); The pore size of the filter holes on the second filter plate (16) is smaller than that of the filter holes on the first filter plate (15), and the tank body (1) further comprises a flow guide plate (17), The flow guide plate (17) is fixedly arranged on the inner wall of the tank body (1) and extends upward in a spiral shape along the rotating direction of the stirring blades (23), and the tank body (1) further comprises a spoiler (18), The spoiler (18) is a strip-shaped and vertically arranged on the inner wall of the tank body (1) and located at the upper end of the flow guide plate (17), and the tank body (1) is provided with a sandwich layer (19), The sandwich layer (19) is provided with an electric heating sheet (6), and the tank body (1) further comprises a scraping device (3), The scraping device (3) comprises a scraping rod (31) and a brush (32), The scraping rod (31) is horizontally arranged on the lower end of the stirring rod (22); The brush (32) is fixedly arranged on the bottom surface of the stirring rod (22), and the end of the brush (32) is in contact with the top surface of the second filter plate (16).
2. The solid caustic waste dissolving apparatus according to claim 1, characterized by The tank body (1) is provided with a thermometer (4) and a densimeter (5).
3. The solid caustic waste dissolving apparatus according to claim 2, wherein The rotating power mechanism is a rotating motor (21).
4. The solid caustic waste dissolving apparatus according to any one of claims 1 to 3, characterized by The tank body (1) is provided with a heat preservation layer outside.