Solid salt dissolving device

Abstract

The application provides a solid salt dissolving device, which comprises a dissolving tank and a circulating pump, a porous plate is fixedly arranged in the dissolving tank, the porous plate divides the inner cavity of the dissolving tank into a dissolving area and a clear liquid area, the dissolving area is located at the upper portion, a hydraulic distribution pipe with a spraying hole is arranged in the dissolving area; the inlet of the circulating pump is communicated with the clear liquid area, the outlet of the circulating pump is communicated with the hydraulic distribution pipe through a second pipeline, an external conveying pipeline is connected to the second pipeline, and an adjusting valve and a pneumatic valve are arranged on the first pipeline and the second pipeline. In the application, the solid salt is accumulated on the porous plate, and the solid salt is continuously washed and dissolved by the circulating flow generated by the circulating pump, and the problem of overload of the stirring paddle does not exist. The application can realize batch production or continuous production, the circulating pump can realize the two functions of circulating dissolution and external conveying, the structure of the device is simplified, the equipment investment is saved, and the maintenance cost is reduced.

Description

Technical Field

[0001] This invention belongs to the technical field of salt dissolving equipment, specifically a solid salt dissolving device. Background Technology

[0002] Traditional salt-dissolving equipment uses a stirring paddle inside a dissolving tank to dissolve salt. When adding solid salt, the addition rate needs to be controlled manually or mechanically. Because the dissolving rate of solid salt can fluctuate, a low dissolving rate can easily overload the stirring paddle.

[0003] Traditional dissolving tanks typically achieve salt dissolution by agitating the water flow with a stirring paddle inside the tank. This method is complex and requires frequent maintenance of the stirring paddle. Furthermore, the salt addition process requires strict control of the addition rate, either manually or mechanically. Adding too much salt can easily overload the stirring paddle, and improper control can lead to the deposition of lumpy salt at the bottom. When the solid salt deposited at the bottom of the tank enters the pump, it can damage the pump impeller, and in severe cases, cause the impeller to seize up, resulting in overload and burnout of the pump motor. Summary of the Invention

[0004] To address the problems in existing technologies where excessive salt addition can easily lead to impeller overload and lumpy salt deposition at the bottom of the dissolving tank, this application proposes a solid salt dissolving device, which includes a dissolving tank and a circulating pump. A feeding port is provided at the top of the dissolving tank, and a perforated plate is fixedly installed inside the dissolving tank. The perforated plate is horizontally arranged and divides the inner cavity of the dissolving tank into a dissolving zone and a clear liquid zone, wherein the dissolving zone is located above the clear liquid zone. A hydraulic distribution pipe is installed in the dissolving zone, and several spray holes are provided on the hydraulic distribution pipe.

[0005] The inlet of the circulating pump is connected to the clear liquid area via a first pipe, and the outlet of the circulating pump is connected to the hydraulic distribution pipe via a second pipe. A shut-off valve is installed on the first pipe, and a first regulating valve and a first pneumatic valve are installed on the second pipe, with the first regulating valve located on the side of the first pneumatic valve facing the circulating pump. An external delivery pipe is connected to the second pipe, and the connection point between the external delivery pipe and the second pipe is located between the first regulating valve and the outlet of the circulating pump. A second regulating valve and a second pneumatic valve are installed on the external delivery pipe, with the second regulating valve located on the side of the second pneumatic valve facing the second pipe. Specifically, the perforated plate 4 has through holes with a diameter of 3-8 mm.

[0006] This application can be used for batch production or continuous production. When using batch production, the specific steps are as follows:

[0007] (11) Add water to the dissolving tank. When the liquid level reaches the set high level, stop adding water.

[0008] (12) Put the first regulating valve and the first pneumatic valve in the open state, and put the second regulating valve and the second pneumatic valve in the closed state.

[0009] (13) Open the shut-off valve and start the circulation pump. The circulation pump returns the liquid in the clear liquid area to the dissolution area through the hydraulic distributor and the spray hole. Add sufficient solid salt into the dissolution tank through the feeding port. The liquid sprayed from the spray hole impacts and dissolves the undissolved solid salt in the dissolution area.

[0010] (14) After the solid salt is completely dissolved, brine is formed. Open the second regulating valve and the second pneumatic valve, then reduce the opening of the first pneumatic valve and use the circulating pump to transport the brine to the point of use through the external pipeline.

[0011] (15) When the liquid level in the tank drops to the set low level, turn off the circulation pump and the dissolution of this batch of solid salt is completed.

[0012] When transporting brine to the outside via the external pipeline, keep the first pneumatic valve open to maintain the circulation of brine in the dissolving tank and prevent secondary crystallization of the salt.

[0013] When conducting continuous production, the specific steps are as follows:

[0014] (21) Add water to the dissolving tank. When the liquid level reaches the set high level, stop adding water.

[0015] (22) The first regulating valve and the first pneumatic valve are in the open state, and the second regulating valve and the second pneumatic valve are in the closed state.

[0016] (23) Open the shut-off valve and start the circulation pump. The circulation pump returns the liquid from the clear liquid zone to the dissolution zone through the hydraulic distributor and the spray hole. Add sufficient solid salt into the dissolution tank through the feed port. The liquid sprayed from the spray hole impacts and dissolves the undissolved solid salt in the dissolution zone. Because the nozzle is set at an angle relative to the radial direction, the liquid in the dissolution zone can form a vortex flow, which is more conducive to the dissolution of solid salt.

[0017] (24) When the brine concentration in the clear liquid area reaches the required level, open the second regulating valve and the second pneumatic valve, then reduce the opening of the first pneumatic valve, and use the circulating pump to transport the brine to the point of use through the external pipeline.

[0018] (25) Solid salt is continuously and evenly added through the feeding port, and water is continuously added to the dissolving tank through the water supply pipe to maintain a stable liquid level in the dissolving tank.

[0019] (26) When production ends, stop adding salt and water, and stop the machine when the liquid level drops to the set low level.

[0020] In this application, a perforated plate is installed inside the dissolving tank. Solid salt added to the tank is accumulated on the perforated plate, and the circulating liquid flow generated by the circulation pump continuously flushes and dissolves the solid salt. This eliminates the overload problem associated with agitators and allows for the large-scale addition of solid salt to the dissolving tank. Because the solid salt is accumulated on the perforated plate until completely dissolved, it prevents solid salt from entering the circulation pump with the liquid, thus avoiding impeller damage and jamming, and ensuring smooth production.

[0021] This application utilizes a single circulating pump to achieve both circulating dissolution and external transportation functions, simplifying the device structure, saving equipment investment, and reducing maintenance costs. This application can switch between batch and continuous production modes, offering flexible operation and suitability for various production scenarios.

[0022] Furthermore, to fully utilize the inner cavity of the dissolving tank, the hydraulic distribution pipe is annular and located radially outside the inner cavity of the dissolving tank. When the hydraulic distribution pipe is too close to the central area of ​​the dissolving tank, the volume of the dissolving tank cannot be fully utilized, which easily leads to a slower flow rate of the liquid on the outer side and less disturbance to the solid salt.

[0023] Furthermore, each spray hole is equipped with a nozzle, the spray direction of which is inclined relative to the radial direction, and all nozzles have the same inclination direction. Specifically, the inclination angle of the nozzle's spray direction relative to the radial direction is 20-40°. This design enables the liquid in the dissolving tube to form a vortex flow, allowing the liquid to impact the solid salt while also allowing small salt particles to flow with the liquid flow, thus maximizing the uniform distribution of solid salt on the porous plate and improving dissolution efficiency. When the nozzle's spray direction is inclined at 20-40° relative to the radial direction, a stable vortex flow is formed in the dissolving tank. Once the liquid in the dissolving tank forms a vortex flow, some salt particles are thrown towards the inner wall of the dissolving tank by the water flow, which helps to decompose large salt particles into smaller ones, thereby increasing the dissolution rate of solid salt.

[0024] Furthermore, to facilitate the replenishment of water into the dissolving tank, a water supply pipe is installed on the top of the dissolving tank. A third regulating valve and a third pneumatic valve are installed on this water supply pipe, with the third regulating valve located on the side of the third pneumatic valve facing the dissolving tank. Specifically, the first regulating valve is a ball valve, the second and third regulating valves are both gate valves, and the first, second, and third pneumatic valves are all butterfly valves.

[0025] Furthermore, to facilitate monitoring of the liquid level inside the dissolving tank, a level gauge is installed on the side wall of the dissolving tank. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of an embodiment of this application.

[0027] Figure 2 This is a top view of the hydraulic distribution pipe. Detailed Implementation

[0028] See Figures 1-2 A solid salt dissolving device includes a dissolving tank 1 and a circulating pump 8. A feeding port 21 is provided on the top plate 22 of the dissolving tank 1. A perforated plate 4 is fixedly installed inside the dissolving tank 1. The perforated plate is horizontally positioned and divides the inner cavity of the dissolving tank into a dissolving zone and a clear liquid zone, wherein the dissolving zone is located above the clear liquid zone. A hydraulic distribution pipe 2 is installed in the dissolving zone. The hydraulic distribution pipe is annular and located radially outside the inner cavity of the dissolving tank. The perforated plate is supported on the inner surface of the tank bottom by support legs 20. An evacuation valve is installed at the bottom of the dissolving tank (not shown in the accompanying drawings). In this application, the perforated plate 4 has through holes with a diameter of 3-8 mm; specifically, in this embodiment, the diameter of the through holes is 4 mm.

[0029] Several injection holes are provided on the hydraulic distribution pipe 2. A nozzle 3 is installed on each injection hole, and the injection direction of the nozzle 3 is inclined relative to the radial direction, with all nozzles having the same inclination direction. In this embodiment, the inclination angle of the injection direction of the nozzle 3 relative to the radial direction is 30°. It is understood that in other embodiments, the inclination angle of the injection direction of the nozzle 3 relative to the radial direction can also be 20°, 25°, 35°, or 40°, or other angles between 20° and 40°.

[0030] A riser 13 is installed on the hydraulic distribution pipe 2, extending upwards through the top plate 22 of the dissolving tank 1. The inlet of the circulating pump 8 is connected to the clear liquid zone via the first pipe 6, and the outlet of the circulating pump 8 is connected to the riser 13 via the second pipe 9, thus connecting the outlet of the circulating pump 8 to the hydraulic distribution pipe. A shut-off valve 7 is installed on the first pipe 6, and a first regulating valve 10 and a first pneumatic valve 11 are installed on the second pipe 9, with the first regulating valve 10 located on the side of the first pneumatic valve 11 facing the circulating pump. An external delivery pipe 14 is connected to the second pipe, with the connection point between the external delivery pipe 14 and the second pipe 9 located between the first regulating valve and the outlet of the circulating pump. A second regulating valve 15 and a second pneumatic valve 16 are installed on the external delivery pipe, with the second regulating valve 15 located on the side of the second pneumatic valve facing the second pipe.

[0031] A water supply pipe 19 is installed on the top plate 22 of the dissolving tank. A third regulating valve 17 and a third pneumatic valve 18 are installed on the water supply pipe 19, wherein the third regulating valve 17 is located on the side of the third pneumatic valve facing the dissolving tank. In this embodiment, the first regulating valve is a ball valve, the second regulating valve and the third regulating valve are both gate valves, and the first, second and third pneumatic valves are all butterfly valves.

[0032] To facilitate monitoring of the liquid level in the dissolving tank, a level gauge 5 is installed on the side wall of the dissolving tank. In this embodiment, the level gauge 5 is specifically a hydrostatic level gauge sensor.

[0033] This embodiment can perform batch production or continuous production. When performing batch production, the specific steps are as follows:

[0034] (11) Open the third regulating valve 17 and the third pneumatic valve 18, and add water to the dissolving tank 1 through the water supply pipe 19. When the liquid level reaches the set high liquid level, close the third pneumatic valve 18.

[0035] (12) The first regulating valve 10 and the first pneumatic valve 11 are in the open state, and the second regulating valve 15 and the second pneumatic valve 16 are in the closed state.

[0036] (13) Open the shut-off valve 7 and start the circulation pump 8. The circulation pump returns the liquid from the clear liquid zone to the dissolution zone through the hydraulic distributor 2 and the nozzle 3. Add sufficient solid salt into the dissolution tank through the feed port 21. The liquid sprayed from the nozzle impacts and dissolves the undissolved solid salt in the dissolution zone. Since the nozzle is set at an angle relative to the radial direction, the liquid in the dissolution zone can form a vortex flow, which is more conducive to the dissolution of solid salt.

[0037] (14) After the solid salt is completely dissolved, brine is formed. Open the second regulating valve 15 and the second pneumatic valve 16, and then reduce the opening of the first pneumatic valve 11. Use the circulating pump to transport the brine to the point of use through the external delivery pipeline 14.

[0038] (15) When the liquid level in the tank drops to the set low level, turn off the circulation pump 8, and the dissolution of this batch of solid salt will end.

[0039] When the brine is being transported to the outside via the external pipeline 14, the first pneumatic valve is kept open to maintain the circulation of the brine in the dissolving tank and prevent secondary crystallization of the salt.

[0040] When conducting continuous production, the specific steps are as follows:

[0041] (21) Open the third regulating valve 17 and the third pneumatic valve 18, and add water to the dissolving tank 1 through the water supply pipe 19. When the liquid level reaches the set high liquid level, close the third pneumatic valve 18.

[0042] (22) The first regulating valve 10 and the first pneumatic valve 11 are in the open state, and the second regulating valve 15 and the second pneumatic valve 16 are in the closed state.

[0043] (23) Open the shut-off valve 7 and start the circulation pump 8. The circulation pump returns the liquid from the clear liquid zone to the dissolution zone through the hydraulic distributor 2 and the nozzle 3. Add sufficient solid salt into the dissolution tank through the feed port 21. The liquid sprayed from the nozzle impacts and dissolves the undissolved solid salt in the dissolution zone. Since the nozzle is set at an angle relative to the radial direction, the liquid in the dissolution zone can form a vortex flow, which is more conducive to the dissolution of solid salt.

[0044] (24) When the brine concentration in the clear liquid area reaches the required level, open the second regulating valve 15 and the second pneumatic valve 16, then reduce the opening of the first pneumatic valve 11, and use the circulating pump to transport the brine to the point of use through the external delivery pipeline 14.

[0045] (25) Solid salt is continuously and evenly added through the feeding port 21, and water is continuously added to the dissolving tank through the water supply pipe to maintain a stable liquid level in the dissolving tank.

[0046] (26) When production ends, stop adding salt and water, and stop the machine when the liquid level drops to the set low level.

Claims

1. A solid salt dissolving device, characterized in that, It includes a dissolving tank and a circulating pump. A feeding port is provided at the top of the dissolving tank. A perforated plate is fixedly installed inside the dissolving tank. The perforated plate is horizontally set and divides the inner cavity of the dissolving tank into a dissolving zone and a clear liquid zone. The dissolving zone is located above the clear liquid zone. A hydraulic distribution pipe is installed in the dissolving zone and several spray holes are provided on the hydraulic distribution pipe. The inlet of the circulating pump is connected to the clear liquid area via a first pipe, and the outlet of the circulating pump is connected to the hydraulic distribution pipe via a second pipe. A shut-off valve is installed on the first pipe, and a first regulating valve and a first pneumatic valve are installed on the second pipe, wherein the first regulating valve is located on the side of the first pneumatic valve facing the circulating pump. An external delivery pipe is connected to the second pipe, and the connection point between the external delivery pipe and the second pipe is located between the first regulating valve and the outlet of the circulating pump. A second regulating valve and a second pneumatic valve are installed on the external delivery pipe, wherein the second regulating valve is located on the side of the second pneumatic valve facing the second pipe.

2. The solid salt dissolving apparatus according to claim 1, wherein The hydraulic distribution pipe is ring-shaped and located radially outside the inner cavity of the dissolving tank.

3. The solid salt dissolving apparatus according to claim 2, wherein Each spray hole is equipped with a nozzle, the spray direction of which is inclined relative to the radial direction, and all nozzles are inclined in the same direction.

4. The solid salt dissolving apparatus according to claim 3, wherein The nozzle's spray direction is tilted at an angle of 20-40° relative to the radial direction.

5. The solid salt dissolving apparatus according to claim 1, characterized in that, A water supply pipe is installed on the top of the dissolving tank. A third regulating valve and a third pneumatic valve are installed on the water supply pipe, with the third regulating valve located on the side of the third pneumatic valve facing the dissolving tank.

6. The solid salt dissolving apparatus according to claim 5, wherein The first regulating valve is a ball valve, the second and third regulating valves are both gate valves, and the first, second and third pneumatic valves are all butterfly valves.

7. The solid salt dissolving apparatus according to claim 1, wherein A level gauge is installed on the side wall of the dissolving tank.

Images