High-concentration caustic soda equipment with high safety
By adopting the reflow structure of the inner barrel and the steam heating layer in the caustic soda equipment and the design of stirring and cleaning scrapers, the problems of heat loss and cleaning difficulty during the evaporation of liquid alkali are solved, and efficient production and safety improvement are achieved.
Patent Information
- Application Number
- CN202420681303.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-03
- Publication Date
- 2024-12-10
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The existing caustic soda equipment has high heat loss during the evaporation of liquid alkali and is difficult to clean, resulting in increased production costs and difficulty in cleaning.
A high-concentration caustic soda equipment is designed, using a reflow structure of the inner barrel and the steam heating layer. The water vapor is reheated through the reflow pipe to avoid direct condensation, and an electrically controlled valve and agitating device are equipped to improve heating uniformity and safety. Use a cleaning scraper to quickly clean the residual solution.
It reduces heat loss, reduces the production cost of high-concentration alkali liquid, improves the evaporation efficiency and safety performance of alkali liquid, and simplifies the cleaning process, saving time and effort.
Smart Images
Figure CN222130997U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of caustic soda preparation, in particular to high-concentration caustic soda equipment with high safety. Background Art
[0002] Sodium hydroxide, also known as caustic soda and caustic soda, has the chemical formula NaOH. It is a highly corrosive strong alkali, usually in the form of white flakes or granules. It is one of the commonly used chemicals and is widely used in the manufacture of wood pulp paper, textiles, soaps and other detergents. It is also used in household alkaline drain cleaning products.
[0003] The preparation process of caustic soda is mainly divided into seven processes: rectification, brine refining, brine electrolysis, liquid caustic soda evaporation, hydrogen chloride treatment, solid caustic soda production and waste gas absorption. The liquid caustic soda evaporation process is to concentrate the low-concentration caustic soda to prepare caustic soda with a concentration that meets the production requirements. The existing caustic soda equipment is heated and evaporated by steam provided by the outside world to achieve the effect of increasing the concentration. However, the water vapor generated inside is usually directly discharged from the device and condensed through a heat exchanger. The heat loss increases during the heat exchange process of the steam, thereby increasing the production cost of the caustic soda. After the evaporation is completed, there is still solution remaining on the inner wall of the device. The residual solution is evaporated and crystallized by the residual temperature in the device and is difficult to clean, which increases the difficulty of cleaning and causes time-consuming and labor-intensive cleaning. Utility Model Content
[0004] In view of the deficiencies in the prior art, the utility model provides a high-concentration caustic soda equipment with high safety, which has the advantages of reducing energy loss and lowering cleaning difficulty, and solves the problems in the above-mentioned background technology.
[0005] The utility model provides the following technical solution: a high-concentration caustic soda equipment with high safety, comprising a device barrel, a reflux pipe is fixedly connected to the left inner wall of the device barrel, a reflux device is fixedly connected to the lower part of the reflux pipe, a steam pipe is fixedly connected to the right inner wall of the device barrel, an electric control valve is fixedly connected to the side wall of the steam pipe, a controller is fixedly connected to the side wall of the electric control valve, an inner barrel is arranged on the inner wall of the device barrel, a steam heating layer is arranged between the device barrel and the inner barrel, and a pressure sensor is fixedly connected to the side wall of the device barrel.
[0006] A cover plate is fixedly installed on the upper end surface of the device barrel, a motor is fixedly connected to the upper surface of the cover plate, an output end of the motor passes through the upper end surface of the cover plate and is fixedly connected to a rotating shaft, a fixed frame is fixedly sleeved on the upper part of the rotating shaft, a fixed plate is symmetrically fixedly connected to the side wall of the fixed frame, a spring is fixedly connected to the side wall of the fixed plate, the other end of the spring is fixedly connected to a limit box, and a cleaning scraper is fixedly connected to the side wall of the limit box.
[0007] Preferably, stirring rods are fixedly sleeved on the rotating shaft at equal intervals, and stirring blades are symmetrically fixedly connected to the side walls of the stirring rods.
[0008] Preferably, a feed port is fixedly connected to the lower right end of the device barrel, a sealing cover is meshingly connected to the upper end of the feed port, a through hole is opened at the upper left end of the device barrel, a return pipe is arranged on the inner wall of the through hole, a connecting device is meshingly connected to the return pipe, and the return pipes are connected to each other via the connecting device.
[0009] Preferably, a heating device is fixedly connected to the inner wall of the device barrel, and a heating pipe is symmetrically fixedly connected to the lower side wall of the device barrel, and the heating pipe is connected to the heating device.
[0010] Preferably, the pressure sensor is connected to the electric-controlled valve via an electrical signal.
[0011] Compared with the prior art, the utility model has the following beneficial effects:
[0012] 1. The inner barrel is heated by a heating device, and the heated alkali liquid inside the inner barrel is concentrated to generate water vapor. The water vapor continuously enters the steam heating layer from the inner barrel through the reflux pipe to heat the side wall of the inner barrel, thereby avoiding the water vapor generated inside being directly discharged from the device and condensed through the heat exchanger, reducing the heat loss of the device, thereby reducing the production cost of high-concentration alkali liquid, and by heating the bottom and inner wall of the inner barrel, the alkali liquid is heated evenly, thereby improving the evaporation efficiency and effect of the alkali liquid.
[0013] 2. When the pressure in the steam heating layer is too high, the pressure sensor sends an electrical signal to the controller, and the controller controls the electric control valve to open to relieve the pressure in the steam heating layer. The safety performance of the device is improved through the cooperation between the pressure sensor and the electric control valve.
[0014] 3. The motor drives the rotating shaft to rotate, the rotating shaft drives the stirring rod to rotate, the stirring rod drives the stirring blade to rotate, the stirring blade stirs the solution, and the alkali solution is further heated evenly during heating, thereby further improving the evaporation efficiency and effect of the alkali solution.
[0015] 4. The fixed frame is driven to rotate by the rotating shaft, the fixed frame drives the limit box to rotate, and the limit box drives the cleaning scraper to rotate. The residual solution on the inner wall is quickly scraped off by the cleaning scraper, which avoids the residual solution being difficult to clean after evaporation and crystallization by the residual temperature in the device. The device can be quickly cleaned after the liquid alkali is evaporated and concentrated, saving time and effort during cleaning. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;
[0017] Figure 2 This is a schematic diagram of the front cross-sectional structure of the utility model;
[0018] Figure 3 This is a schematic diagram of the top view of the cover plate of the utility model;
[0019] Figure 4 This is a schematic diagram of the cross-sectional structure of the utility model at AA;
[0020] Figure 5 This is a schematic diagram of the cross-sectional structure of the barrel of the utility model.
[0021] In the figure: 1. Device barrel; 2. Cover plate; 3. Motor; 4. Feed inlet; 5. Steam pipe; 6. Electric control valve; 7. Reflux pipe; 8. Heating pipe; 9. Rotating shaft; 10. Fixed frame; 11. Limit box; 12. Cleaning scraper; 13. Stirring rod; 14. Stirring blade; 15. Inner barrel; 16. Heating device; 17. Spring; 18. Pressure sensor; 19. Fixed plate. DETAILED DESCRIPTION
[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0023] See also Figure 1-Figure 2 A high-concentration caustic soda device with high safety includes a device barrel 1, a reflux pipe 7 is fixedly connected to the left inner wall of the device barrel 1, a reflux device is fixedly connected to the lower part of the reflux pipe 7, a steam pipe 5 is fixedly connected to the right inner wall of the device barrel 1, an electric control valve 6 is fixedly connected to the side wall of the steam pipe 5, a controller is fixedly connected to the side wall of the electric control valve 6, an inner barrel 15 is arranged on the inner wall of the device barrel 1, a steam heating layer is arranged between the device barrel 1 and the inner barrel 15, a pressure sensor 18 is fixedly connected to the side wall of the device barrel 1, and when the device is working, The inner barrel 15 is heated by the heating device 16, and the heated alkali liquid inside the inner barrel 15 is concentrated to generate water vapor. The water vapor continuously enters the steam heating layer from the inner barrel 15 through the reflux pipe 7 to heat the side wall of the inner barrel 15, thereby avoiding the water vapor generated inside being directly discharged from the device and condensed through the heat exchanger, reducing the heat loss of the device, thereby reducing the production cost of high-concentration alkali liquid, and by heating the bottom and inner wall of the inner barrel 15, the alkali liquid is heated evenly, thereby improving the evaporation efficiency and effect of the alkali liquid;
[0024] See also Figure 3-Figure 4A cover plate 2 is fixedly installed on the upper end surface of the device barrel 1, and a motor 3 is fixedly connected to the upper surface of the cover plate 2. The output end of the motor 3 passes through the upper end surface of the cover plate 2 and is fixedly connected to a rotating shaft 9. A fixed frame 10 is fixedly sleeved on the upper part of the rotating shaft 9. A fixed plate 19 is symmetrically fixedly connected to the side wall of the fixed frame 10. A spring 17 is fixedly connected to the side wall of the fixed plate 19. The other end of the spring 17 is fixedly connected to a limit box 11. A cleaning scraper 12 is fixedly connected to the side wall of the limit box 11. The rotating shaft 9 drives the fixed frame 10 to rotate, the fixed frame 10 drives the limit box 11 to rotate, and the limit box 11 drives the cleaning scraper 12 to rotate. The cleaning scraper 12 is used to quickly scrape off the residual solution on the inner wall, thereby avoiding the residual solution from being difficult to clean after being evaporated and crystallized by the residual temperature in the device, so that the device can be quickly cleaned after the liquid alkali is evaporated and concentrated, so that time and labor are saved during cleaning;
[0025] See also Figure 5 , stirring rods 13 are fixedly sleeved on the rotating shaft 9 at equal intervals, and stirring blades 14 are symmetrically fixedly connected to the side walls of the stirring rods 13. At the same time, the motor 3 drives the rotating shaft 9 to rotate, thereby improving the rotating shaft 9 to drive the stirring rods 13 to rotate, and the stirring blades 14 are driven to rotate by the stirring rods 13. The solution is stirred by the stirring blades 14, so that the alkali solution is further heated evenly during heating, and the evaporation efficiency and effect of the alkali solution are further improved; a feed port 4 is fixedly connected to the inner wall of the right side of the device barrel 1, and a sealing cover is meshedly connected to the upper end of the feed port 4. A through hole is opened at the upper left end of the device barrel 1, and a reflux pipe 7 is arranged on the inner wall of the through hole. A connecting device is meshedly connected to the reflux pipe 7, and the reflux pipes 7 are connected through the connecting device to add materials through the feed port 4, and the opening of the feed port 4 is sealed by the sealing cover. To prevent alkali solution leakage, the reflux device refluxes the steam in the inner barrel 15 into the steam heating layer through the reflux pipe 7, so that the steam heat is recycled and reused, and at the same time, the excessive pressure in the inner barrel 15 caused by the heating steam is avoided; the lower end of the device barrel 1 is fixedly connected with a heating device 16, and the lower side wall of the device barrel 1 is symmetrically fixedly connected with a heating pipe 8, the heating pipe 8 is connected to the heating device 16, and the interior of the inner barrel 15 is heated by the heating device 16; the pressure sensor 18 is connected to the electric control valve 6 through an electrical signal. When the pressure in the steam heating layer is too high, the pressure sensor 18 sends an electrical signal to the controller, and the controller controls the electric control valve 6 to open to relieve the pressure in the steam heating layer. The safety performance of the device is improved by the cooperation between the pressure sensor 18 and the electric control valve 6.
[0026] Working principle: When the device is working, the inner barrel 15 is heated by the heating device 16, and the heated alkali liquid inside the inner barrel 15 is concentrated to generate water vapor. The water vapor continuously enters the steam heating layer from the inner barrel 15 through the reflux pipe 7 to heat the side wall of the inner barrel 15, thereby avoiding the water vapor generated inside being directly discharged from the device and condensed through the heat exchanger, reducing the heat loss of the device, thereby reducing the production cost of high-concentration alkali liquid, and by heating the bottom and inner wall of the inner barrel 15, the alkali liquid is heated evenly, thereby improving the evaporation efficiency and effect of the alkali liquid;
[0027] When the pressure in the steam heating layer is too high, the pressure sensor 18 sends an electrical signal to the controller, and the controller controls the electric control valve 6 to open to release the pressure in the steam heating layer. The safety performance of the device is improved by the cooperation between the pressure sensor 18 and the electric control valve 6.
[0028] At the same time, the motor 3 drives the rotating shaft 9 to rotate, and the rotating shaft 9 drives the stirring rod 13 to rotate, and the stirring rod 13 drives the stirring blade 14 to rotate, and the stirring blade 14 stirs the solution, so that the alkali solution is heated evenly during heating, and the evaporation efficiency and effect of the alkali solution are further improved;
[0029] The rotating shaft 9 drives the fixed frame 10 to rotate, the fixed frame 10 drives the limit box 11 to rotate, and the limit box 11 drives the cleaning scraper 12 to rotate. The cleaning scraper 12 can quickly scrape off the residual solution on the inner wall, avoiding the residual solution from being difficult to clean after being evaporated and crystallized by the residual temperature in the device, so that the device can be quickly cleaned after the liquid alkali is evaporated and concentrated, saving time and effort during cleaning.
Claims
1. A high-concentration caustic soda device with high safety, comprising a device barrel (1), characterized in that: A return pipe (7) is fixedly connected to the left inner wall of the device barrel (1), a return device is fixedly connected to the lower part of the return pipe (7), a steam pipe (5) is fixedly connected to the right inner wall of the device barrel (1), an electric control valve (6) is fixedly connected to the side wall of the steam pipe (5), a controller is fixedly connected to the side wall of the electric control valve (6), an inner barrel (15) is arranged on the inner wall of the device barrel (1), a steam heating layer is arranged between the device barrel (1) and the inner barrel (15), and a pressure sensor (18) is fixedly connected to the side wall of the device barrel (1).
2. A high-concentration caustic soda equipment with high safety according to claim 1, characterized in that: A cover plate (2) is fixedly mounted on the upper end surface of the device barrel (1), a motor (3) is fixedly connected to the upper surface of the cover plate (2), an output end of the motor (3) passes through the upper end surface of the cover plate (2) and is fixedly connected to a rotating shaft (9), a fixed frame (10) is fixedly sleeved on the upper part of the rotating shaft (9), a fixed plate (19) is symmetrically fixedly connected to the side wall of the fixed frame (10), a spring (17) is fixedly connected to the side wall of the fixed plate (19), the other end of the spring (17) is fixedly connected to a limit box (11), and a cleaning scraper (12) is fixedly connected to the side wall of the limit box (11).
3. A high-concentration caustic soda equipment with high safety according to claim 2, characterized in that: The rotating shaft (9) is fixedly sleeved with stirring rods (13) at equal intervals, and the side walls of the stirring rods (13) are symmetrically fixedly connected with stirring blades (14).
4. A high-concentration caustic soda equipment with high safety according to claim 1, characterized in that: A feed port (4) is fixedly connected to the inner wall on the right side of the device barrel (1), and a sealing cover is meshedly connected to the upper end of the feed port (4). A through hole is opened at the upper left end of the device barrel (1), and a return pipe (7) is arranged on the inner wall of the through hole. A connecting device is meshedly connected to the return pipe (7), and the return pipes (7) are connected to each other via the connecting device.
5. The high-concentration caustic soda equipment with high safety according to claim 1 is characterized in that: A heating device (16) is fixedly connected to the lower end of the device barrel (1), and a heating pipe (8) is symmetrically fixedly connected to the lower side wall of the device barrel (1), and the heating pipe (8) is in communication with the heating device (16).
6. A high-concentration caustic soda equipment with high safety according to claim 1, characterized in that: The pressure sensor (18) is connected to the electric control valve (6) via an electrical signal.