A mineralization tank

Abstract

The present application belongs to the field of water treatment, and particularly relates to a mineralization treatment pool. The mineralization treatment pool comprises a water inlet distribution channel, an upward flow dissolving pool, a downward flow sand filter pool, a central channel, a connecting channel, a feeding port and a pipe gallery. The water inlet distribution channel adopts weir flow to distribute water inlets to each grid treatment pool. The upward flow dissolving pool is used for dissolving reaction of mineralization filler to increase the alkalinity, hardness and nutrient ions of desalinated water. The downward flow sand filter pool ensures stable turbidity of the outlet water, especially when the mineralization filler is supplemented, the influence of the increased turbidity of the outlet water of the mineralization dissolving pool is eliminated. The central channel is divided into three layers, wherein the bottom layer is a distribution channel for water inlets of the dissolving pool and distribution channels for backwashing gas and water, the middle layer is a distribution channel for outlet water of the sand filter pool and distribution channels for backwashing gas and water, and the upper layer is a multifunctional central channel. The multifunctional central channel is connected with the connecting channel of the dissolving pool and the water collecting tank of the sand filter pool. The present application can be widely applied to the remineralization and restabilization of various desalinated water.

Description

Technical Field

[0001] This invention belongs to the field of water treatment, specifically a mineralization treatment tank consisting of an upward flow dissolution tank and a downward flow sand filter. Background Technology

[0002] Freshwater resources are scarce in coastal areas of northern my country, and even more so in island regions, although surrounding seawater resources are abundant. Desalinated seawater, as an unconventional water resource, has become an important component of water use in coastal and island areas. Northwest my country also suffers from water scarcity, but brackish water is widely distributed. Desalinated brackish water, as an unconventional water resource, has become an important supplement to water use in the water-scarce northwest. However, desalinated water, due to the removal of most mineral ions, alkalinity, and hardness, easily "dissolves" solid minerals it comes into contact with, resulting in unstable water quality and corrosiveness to water distribution networks. Furthermore, the removal of beneficial mineral ions makes desalinated water unsuitable for human health as drinking water and detrimental to crop growth as agricultural irrigation water. Therefore, based on water quality requirements, desalinated seawater and brackish water need to undergo mineralization treatment to increase alkalinity, hardness, and the required mineral ions, protecting water distribution networks and water facilities while meeting the demand for beneficial mineral ions. Currently, limestone dissolution tanks, as a type of mineralization treatment structure, have the advantages of stable mineralization effect, easy adjustment of mineralization degree, excellent effluent quality, and simple and flexible management. However, they also have problems such as increased effluent turbidity, longer flushing time, waste of flushing water, and waste of limestone packing material after adding limestone packing. Summary of the Invention

[0003] This invention relates to a mineralization treatment tank consisting of an upward-flow dissolving tank and a downward-flow sand filter, primarily used for the remineralization and restabilization of desalinated seawater and brackish water. Desalinated water from unconventional water resources such as seawater and brackish water, after mineralization and stabilization, is supplied to municipal public water, agricultural irrigation water, and industrial water. The effluent from the dissolving tank, after filtration through the sand filter, maintains stable turbidity even after the addition of limestone packing material, while also featuring short rinsing time, low rinsing water volume, and minimal limestone packing material consumption.

[0004] The present invention specifically adopts the following technical solution:

[0005] The mineralization treatment tank includes an inlet distribution channel, a lower upward-flow dissolving tank, an upper downward-flow sand filter, a central channel, a connecting channel, a feeding inlet, and a pipe gallery. The inlet distribution channel uses a weir flow to distribute water to each treatment tank. The dissolution reaction of the mineralizing filler occurs in the lower upward-flow dissolving tank, increasing the alkalinity, hardness, and nutrient ions of the desalinated water. The upper downward-flow sand filter ensures stable effluent turbidity, especially mitigating the impact of increased turbidity in the dissolving tank effluent when replenishing the mineralizing filler. The central channel has three layers: the bottom distribution channel serves as the inlet for the dissolving tank and the distribution channel for backwash air and water; the middle distribution channel serves as the effluent for the sand filter and the distribution channel for backwash air and water; and the upper layer is a multi-functional central channel. The multi-functional central channel connects to the dissolving tank connecting channel and to the sand filter collection trough. Both the lower dissolving tank and the upper sand filter can be air-washed, air-water-washed, or water-flushed. The connecting channel extends from the top of the lower dissolving tank to the water passage opening of the multi-functional central channel. The feeding port is located at the top of the connecting channel, extending to the top of the treatment tank, and serves as the feeding port when replenishing the mineralization packing. During normal operation, it functions as the effluent connecting channel. During normal operation, the effluent from the dissolving tank enters the multi-functional central channel through the connecting channel, and then flows into the sand filter via the multi-functional central channel and a collection trough. During dissolving tank feeding and packing flushing, and sand filter backwashing, the flushing wastewater from the dissolving tank is discharged into the multi-functional central channel via the connecting channel or the sand filter drainage is discharged into the wastewater channel via the collection trough. The multi-functional central channel is equipped with a drainage gate connected to the wastewater channel; opening the drainage gate allows flushing wastewater to be discharged into the wastewater channel. The pipe gallery contains various pipes and corresponding valves and fittings for inlet, outlet, flushing, and exhaust. The mineralization packing uses food-grade limestone-like minerals, and the sand filter media uses quartz sand. The dissolving tank uses filter heads and plates for water and air distribution, while the sand filter uses bread-shaped pipes for water and air distribution. This technology can be widely applied to the remineralization and restabilization of various types of demineralized water.

[0006] Furthermore, the water inlet distribution channel is located above the pipe gallery, adjacent to the mineralization treatment pond. The water inlet distribution channel includes a main water inlet channel, a water inlet distribution weir, and individual water inlet channels. The demineralized water in the main water inlet channel is evenly distributed to each individual water inlet channel through the water inlet distribution weir.

[0007] Furthermore, the demineralized water is introduced into the bottom distribution channel of the central channel through individual inlet pipes. Adjustable pneumatic valves are installed on the individual inlet pipes to control the water level in the individual inlet channels.

[0008] Furthermore, the bottom distribution channel of the central channel serves as the inlet channel for the dissolving tank and the distribution channel for backwash air and water.

[0009] Furthermore, the central channel's bottom distribution channel guides the desalinated water to the lower part of the filter head and filter plate in the dissolving tank through water distribution holes and air distribution holes.

[0010] Furthermore, the filter head and filter plate constitute the water and air distribution system for the lower dissolution tank.

[0011] Furthermore, the dissolution tank is located below the sand filter and operates in an upward flow mode. The desalinated water reacts with the packing material to provide mineral ions, alkalinity, and hardness to the desalinated water.

[0012] Furthermore, the lower dissolution tank packing material uses limestone-like minerals, which can react with the desalinated water to provide the required mineral ions to the desalinated water according to the water quality requirements. The effective particle size of the limestone-like mineral packing material is 0.9–1.2 mm, and the packing height is 1.2–2.2 m.

[0013] Furthermore, the supporting layer of the lower dissolution tank is made of coarse sand with an effective particle size of 2.0–4.0 mm and a thickness of 0.15 m.

[0014] Furthermore, the effluent from the lower dissolution tank is introduced into the multi-functional central channel through a connecting channel and its water passage holes. The multi-functional central channel, through a sand filter collection trough connected to it, introduces the effluent from the dissolution tank into the upper sand filter.

[0015] Furthermore, the upper sand filter adopts a downflow operation mode to ensure the quality of the effluent from the treatment tank, save flushing water, and reduce the consumption of packing material in the dissolving tank.

[0016] Furthermore, the upper sand filter ensures the quality of the effluent from the dissolution tank. Especially after adding limestone-like packing material to the dissolution tank, it can control the turbidity of the effluent, reduce the amount of flushing water, and decrease the loss of the limestone-like packing material. The sand filter media uses fine sand with an effective particle size of 0.55mm and a packing height of 0.8m.

[0017] Furthermore, the supporting layer of the upper sand filter is made of coarse sand with an effective particle size of 2.0–4.0 mm and a thickness of 0.35 m.

[0018] Furthermore, the upper sand filter's water and air distribution system employs "bread pipes." Water and air distribution holes are evenly distributed along the length of the bread pipes within the filter cells. The bread pipes pass through the partition wall between the filter cells and the central channel, extending into the multi-functional central channel (where the bread pipes are encased in plain concrete). Water and air distribution risers are installed at the ends of the bread pipes, extending downwards to the middle distribution channel of the central channel. The effluent from the sand filter is collected through the bread pipes, and then guided to the middle distribution channel of the central channel via the water and air distribution risers at the ends of the bread pipes.

[0019] Furthermore, the distribution channel in the middle layer of the central channel is connected to the effluent pipe of the individual sand filter tanks, which is led out from the main effluent pipe in the pipe gallery, to draw out the effluent from the mineralization treatment tank. Pneumatic regulating valves are installed on the effluent pipes of the individual sand filters to control the operating water level of the individual sand filters.

[0020] Furthermore, the connecting channel extends from the lower dissolution pool to the water passage in the partition wall between it and the multi-functional central channel.

[0021] Furthermore, the feeding port is located at the top of the connecting channel, rising to the top of the treatment pool.

[0022] Furthermore, the main water inlet pipe inside the utility tunnel is connected to the main water inlet channel from the bottom plate, and a main water inlet valve is installed on the main water inlet pipe.

[0023] Furthermore, the main flushing water pipe in the pipe gallery leads downwards to the flushing water pipes of the individual dissolving tanks, which are connected to the inlet pipes of the individual dissolving tanks. Pneumatic valves are installed on the flushing water pipes of the individual dissolving tanks. The pneumatic regulating valves on the inlet pipes of the individual dissolving tanks and the pneumatic valves on the flushing water pipes of the individual tanks control the switching between the demineralized water inlet and the flushing water inlet.

[0024] Furthermore, the main flushing water pipe in the pipe gallery leads upwards to the flushing water pipes of individual sand filters, which are connected to the outlet pipes of the individual sand filters. Pneumatic valves are installed on the individual flushing water pipes. The pneumatic regulating valves on the outlet pipes of the individual sand filters and the pneumatic valves on the flushing water pipes control the switching between the sand filter outlet and the flushing water inlet.

[0025] Furthermore, an vent pipe is led out from the main vent pipe in the pipe gallery to the individual dissolving tank, and the vent pipe of the individual dissolving tank is flushed at the bottom. A pneumatic valve is installed on the individual vent pipe. The venting of the dissolving tank and sand filter tank is achieved by switching the pneumatic valves on the individual vent pipe, the individual flushing pipe, and the individual inlet and outlet water pipe.

[0026] Furthermore, the main flushing air pipe within the pipe gallery is led out to the flushing air pipes of the bottom and middle distribution channels of the central channel, respectively, to introduce air during the flushing of the dissolving tank and sand filter tank. The flushing air pipes to the bottom and middle distribution channels of the central channel are all connected to the top and are equipped with pneumatic valves.

[0027] Furthermore, the central channel's bottom and middle distribution channels within the utility tunnel are equipped with exhaust pipes, which are connected flush to the top of their respective flushing air pipes and fitted with pneumatic valves. The main exhaust pipe is connected above the highest water level of the mineralization treatment pond.

[0028] Furthermore, a drainage gate is installed at the end of the multi-functional central channel. When the single-cell treatment tank is flushed after replenishing the packing material, the drainage gate is opened, and the flushing wastewater from the dissolving tank and sand filter tank is discharged into the drainage channel through the drainage gate.

[0029] Furthermore, a main drain pipe is installed in the drainage ditch to discharge the collected flushing wastewater.

[0030] The advantages of this invention are: the structure of the dissolving tank with the superimposed sand filter allows the effluent from the upward flow dissolving tank to flow out after being filtered by the downward flow sand filter. After replenishing the dissolving tank packing, the turbidity of the effluent from the treatment tank is effectively ensured to be stable, the rinsing time is reduced, the rinsing water volume is saved, the consumption of dissolving tank packing is reduced, and the production operation and maintenance management is simple and convenient.

[0031] The present invention has the following advantages:

[0032] The structure of the dissolving tank with a superimposed sand filter allows the effluent from the upward flow dissolving tank to be filtered by the downward flow sand filter before flowing out. After replenishing the dissolving tank packing, the turbidity of the effluent from the treatment tank is effectively stabilized, the rinsing time is reduced, the rinsing water volume is saved, the consumption of dissolving tank packing is reduced, and the production operation and maintenance management is simplified and convenient. Attached Figure Description

[0033] Figure 1 A schematic diagram (I) and a cross-sectional view (AA) of the interior of the mineralization treatment pool;

[0034] Figure 2 Schematic diagram of the interior of the mineralization treatment pool (II);

[0035] Figure 3 This is a schematic diagram of the top surface of the mineralization treatment pool;

[0036] Figure 4 This is a schematic diagram of the upper layer of the mineralization treatment pool;

[0037] Figure 5 This is a schematic diagram of the middle layer of the mineralization treatment pool;

[0038] Figure 6 This is a schematic diagram of the lower layer of the mineralization treatment pool;

[0039] Figure 7 This is a sectional view of BB;

[0040] Figure 8 This is a CC section view;

[0041] Figure 9 This is a sectional view of DD;

[0042] Figure 10 This is a sectional view of EE.

[0043] Numbers in the diagram:

[0044] 1. Main Inlet Pipe; 2. Main Inlet Valve; 3. Main Inlet Channel; 4. Inlet Distribution Weir; 5. Individual Cell Inlet Channel; 6. Individual Cell Dissolving Tank Inlet Pipe; 7. Pneumatic Regulating Valve I; 7. Bottom Distribution Channel 7a; 8. Air Distribution Hole; 9. Water Distribution Hole; 10. Filter Head; 11. Filter Plate; 12a. Support Layer; 12b. Limestone-like Packing Material; 13. Connecting Channel; 13a. Feed Inlet; 14. Multifunctional Central Channel; 15. Water Collection Tank; 16a. Support Layer; 16b. Fine Sand Filter Media; 17. Bread Pipe; 18. Air Distribution Vertical Pipe; 19. Water Distribution Vertical Pipe; 20. Middle Layer Distribution Channel; 21. Sand Filter Outlet and Flushing Inlet Pipe; 22. Dissolving Tank Inlet and Flushing Inlet Pipe; 23. Individual Cell Sand Filter Outlet Pipe Pneumatic Regulating Valve (Pneumatic Regulating Valve II); 24. Individual Cell Sand Filter Flushing Water Pipe Pneumatic Valve (Pneumatic Valve I); Individual Cell Dissolving Tank Flushing Water Pipe Pneumatic valve (Pneumatic valve II) 25, Outlet main pipe 26, Flushing water main pipe 27, Vent main pipe 28, Single cell vent pipe 28a, Single cell vent pipe Pneumatic valve (Pneumatic valve III) 29, Middle layer distribution channel flushing air pipe 30, Bottom layer distribution channel flushing air pipe 31, Middle layer distribution channel flushing air pipe Pneumatic valve (Pneumatic valve IV) 32, Bottom layer distribution channel flushing air pipe Pneumatic valve (Pneumatic valve V) 33, Single cell flushing air pipe 34, Flushing air main pipe 35, Drainage channel 36, Exhaust pipe 37, Drainage gate 38, Horn wall pipe 39, Horn wall pipe 40, Inspection flange blind plate 41, Drainage channel inspection cover plate 42, Feed port cover plate 43, Inlet channel inspection cover plate 44, Ventilation shaft 45, Stacked beam valve 46, Inspection cover plate 46a, Overflow pipe 47, Inlet channel vent pipe 48. Detailed Implementation

[0045] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings. It should be noted that these descriptions of embodiments are intended to aid in understanding the invention and do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0046] like Figure 1 , Figure 2The diagram shows the internal structure of a mineralization treatment tank in an upflow dissolution tank stacked with a downflow sand filter. The mineralization treatment tank of this upflow dissolution tank stacked with a downflow sand filter includes several unit filter cells. Each unit filter cell is characterized by an inlet distribution channel located above the pipe gallery, adjacent to the mineralization treatment tank. The inlet distribution channel includes a main inlet channel 3, an inlet distribution weir 4, and individual inlet channels 5. The inlet distribution weir 4 evenly distributes the demineralized water from the main inlet channel 3 to each individual inlet channel 5. The main inlet channel 3 is equipped with a stacked beam valve 46, an overflow pipe 47, and an inlet channel vent pipe 48. The stacked beam valve 46 can divide the main inlet channel 3 into two sections. The overflow pipe 47 can discharge upstream water in an emergency. The vent pipe 48 can empty the main inlet channel 3. The individual inlet channels 5 introduce demineralized water into the bottom distribution channel 7a through individual inlet pipes 6. An adjustable pneumatic valve 7 is installed on the individual inlet pipe 6 to control the water level in the individual inlet channel 5. The bottom distribution channel 7a is the inlet channel for the dissolving tank and the distribution channel for backwash air and water. The bottom distribution channel 7a leads the demineralized water to the lower part of the filter head 10 and filter plate 11 of the dissolving tank through the water distribution hole 9 and the air distribution hole 8. The filter head 10 and filter plate 11 are the water and air distribution system of the lower dissolving tank. The packing material of the lower dissolving tank is limestone-like packing material 12b, which can react with the demineralized water and provide the required mineral ions to the demineralized water according to the water quality requirements. The limestone-like packing material 12b has an effective particle size of 0.9-1.2 mm and a packing height of 1.2-2.2 m. The support layer 12a of the lower dissolving tank is made of coarse sand with an effective particle size of 2.0-4.0 mm and a thickness of 0.15 m. The effluent from the lower dissolving tank is introduced into the multi-functional central channel 14 through the connecting channel 13 and the water passage holes on it. The multi-functional central channel 14, connected to the sand filter collection trough 15, introduces the effluent from the dissolving tank into the upper sand filter. The sand filter media is fine sand 16b with an effective particle size of 0.55 mm and a packing height of 0.8 m. The support layer 16a of the upper sand filter is made of coarse sand with an effective particle size of 2.0–4.0 mm and a thickness of 0.35 m. The water and air distribution system of the upper sand filter uses bread pipes 17. Water and air distribution holes are evenly arranged along the length of the bread pipes 17 within the filter grid. The bread pipes pass through the partition wall between the filter grid and the central channel, extend into the multi-functional central channel 14 (the bread pipes are encased in plain concrete within the central channel), and have water distribution risers 19 and air distribution risers 18 at their ends, extending downwards to the middle distribution channel 20. The effluent from the sand filter is collected through the bread pipes 17, and then led to the middle distribution channel 20 through the water distribution risers 19 and air distribution risers 18 at the ends of the bread pipes 17. The intermediate distribution channel 20 connects to the effluent pipes of the individual sand filters, which are led out from the main effluent pipe 26 in the pipe gallery, to draw out the effluent from the mineralization treatment tank. A pneumatic regulating valve 23 is installed on the individual effluent pipe to control the operating water level of the individual sand filters. The connecting channel 13 extends from the lower dissolution tank to the water passage in the partition wall between it and the multi-functional central channel 14. The feed inlet 13a is located above the connecting channel 13 and rises to the top of the treatment tank. The main inlet pipe 1 in the pipe gallery connects to the main inlet channel 3 from the bottom plate, and an inlet valve 2 is installed on the main inlet pipe 1.The main flushing water pipe 27 in the pipe gallery leads downwards to the flushing water pipes of the individual dissolving tanks, connecting to the inlet pipes 6 of the individual dissolving tanks. A pneumatic valve 25 is installed on the individual flushing water pipe. The pneumatic regulating valve 7 on the inlet pipe and the pneumatic valve 25 on the flushing water pipe control the switching between demineralized water inlet and flushing water inlet for the dissolving tank. The main flushing water pipe 27 in the pipe gallery leads upwards to the flushing water pipes of the individual sand filters, connecting to the outlet pipes of the individual sand filters. A pneumatic valve 24 is installed on the flushing water pipe. The pneumatic regulating valve 23 on the outlet pipe and the pneumatic valve 24 on the flushing water pipe control the switching between sand filter outlet and flushing water inlet for the sand filter. A vent pipe 28a leads from the main vent pipe 28 in the pipe gallery to the individual dissolving tank, and the vent pipe 28a is flush with the bottom of the individual dissolving tank flushing pipe. A pneumatic valve 29 is installed on the vent pipe. Pneumatic valve 29 is opened, while pneumatic valves 25 and 33 are closed, venting the dissolving tank. Pneumatic valves 29, 24, and 25 are opened, while pneumatic valves 23 and 33 are closed, venting the sand filter. The main flushing air pipe 35 within the pipe gallery leads to the flushing air pipes of the bottom distribution channel 7a and the middle distribution channel 20 of the central channel, respectively, to introduce air during air flushing of the dissolving tank and sand filter. The flushing air pipes to the bottom distribution channel 7a and the middle distribution channel 20 of the central channel are connected to the top and are equipped with pneumatic valves 33 and 32, respectively. Exhaust pipes for the bottom distribution channel 7a and the middle distribution channel 20 are installed, connected flush to the top of their respective flushing air pipes, and are equipped with pneumatic valves. The main exhaust pipe 37 is connected above the highest water level of the mineralization treatment tank. A drainage gate 38 is installed at the end of the multi-functional central channel. When flushing after replenishing the packing material in the single-cell treatment tank, the drainage gate 38 is opened, and the flushing wastewater from the dissolving tank and sand filter is discharged through the drainage gate 38 to the drainage channel 36. Drainage ditch 38 is equipped with a main drainage pipe to discharge the collected flushing wastewater. The above description merely illustrates an embodiment of the present invention, and while it is relatively specific and detailed, it should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A mineralization treatment pond, characterized in that, The system includes an inlet distribution channel, an upward-flow dissolving tank, a downward-flow sand filter, a central channel, a connecting channel (13), a feeding port (13a), and a pipe gallery. The inlet distribution channel uses weir flow to distribute water to each treatment tank. The central channel is divided into three layers: the bottom distribution channel (7a) is the inlet channel for the dissolving tank and the backwash air and water distribution channel; the middle distribution channel (20) is the outlet channel for the sand filter and the backwash air and water distribution channel; and the top layer is the multi-functional central channel (14). The multi-functional central channel (14) is connected to the dissolving tank connecting channel (13) and also to the sand filter's water collection trough (15). The connecting channel (13) extends from the top of the lower dissolving tank to the water passage of the multi-functional central channel (14). The feeding port (13a) is located at... The upper part of the connecting channel (13) extends to the top of the treatment tank; during normal operation, the effluent from the dissolving tank enters the multi-functional central channel (14) through the connecting channel (13), and then enters the sand filter tank through the multi-functional central channel (14) and the water collection trough (15); during the feeding and packing flushing of the dissolving tank and the backwashing of the sand filter tank, the flushing drainage of the dissolving tank is discharged into the multi-functional central channel (14) through the connecting channel (13), and the drainage of the sand filter tank is discharged into the multi-functional central channel (14) through the water collection trough (15); the multi-functional central channel (14) is equipped with a drainage gate (38) connected to the wastewater channel, and the flushing wastewater is discharged into the wastewater channel through the drainage gate (38); various pipes and corresponding valves and fittings for water inlet, water outlet, flushing, and exhaust are installed in the pipe gallery.

2. The mineralization treatment pool according to claim 1, characterized in that, The water inlet distribution channel is located at the top of the pipe gallery; the water inlet distribution channel includes a main water inlet channel, a water inlet distribution weir, and individual water inlet channels, which distribute the demineralized water in the main water inlet channel evenly to each individual water inlet channel through the water inlet distribution weir.

3. The mineralization treatment pool according to claim 2, characterized in that, The single-cell inlet channel (5) introduces desalinated water into the bottom distribution channel (7a) of the central channel through the single-cell dissolving tank inlet pipe (6); a pneumatic regulating valve (7) is installed on the single-cell dissolving tank inlet pipe (6) to control the water level of the single-cell inlet channel (5).

4. The mineralization treatment pool according to claim 3, characterized in that, The bottom distribution channel is the water inlet and backwash air and water distribution channel of the dissolving tank. It leads the demineralized water to the lower part of the filter head (10) and filter plate (11) of the dissolving tank through the water distribution hole (9) and air distribution hole (8). The filter head (10) and filter plate (11) are the water and air distribution system of the lower dissolving tank.

5. The mineralization treatment pool according to claim 1, characterized in that, The dissolving tank is located below the sand filter and operates in an upward flow mode; the dissolving tank is equipped with packing material for dissolving the demineralized water; a supporting layer for the dissolving tank is provided below the packing material.

6. The mineralization treatment pool according to claim 5, characterized in that, The filler material is a limestone-like mineral with an effective particle size of 0.9–1.2 mm and a filler height of 1.2–2.2 m; the support layer is coarse sand with an effective particle size of 2.0–4.0 mm and a thickness of 0.15 m.

7. The mineralization treatment pool according to claim 5, characterized in that, The effluent from the dissolving tank is introduced into the multi-functional central channel (14) through the connecting channel (13) and the water passage holes thereon; the multi-functional central channel (14) introduces the effluent from the dissolving tank into the upper sand filter tank through the sand filter tank collection trough (15) connected to it.

8. The mineralization treatment pool according to claim 1, characterized in that, The sand filter adopts a downward flow operation mode; the sand filter is equipped with filter media; and a sand filter support layer is set below the filter media.

9. The mineralization treatment pool according to claim 8, characterized in that, The filter media is made of fine sand with an effective particle size of 0.55 mm and a filler height of 0.8 m; the support layer is made of coarse sand with an effective particle size of 2.0 to 4.0 mm and a thickness of 0.35 m.

10. The mineralization treatment pool according to claim 7, characterized in that, The water and air distribution system of the sand filter adopts a bread pipe (17). The bread pipe (17) has water and air distribution holes evenly arranged along the length of the pipe in the filter grid. The bread pipe (17) passes through the partition wall between the filter grid and the central channel and extends into the multi-functional central channel (14). The ends of the bread pipe (17) are provided with water distribution vertical pipe (19) and air distribution vertical pipe (18), which extend downward to the middle layer distribution channel (20).

11. The mineralization treatment pool according to claim 9, characterized in that, The middle layer distribution channel (20) is connected to the outlet pipe of the single-cell sand filter from the main outlet pipe (26) to draw out the water from the mineralization treatment tank; a pneumatic regulating valve (23) is installed on the outlet pipe of the single-cell sand filter to control the operating water level of the single-cell sand filter.

12. The mineralization treatment pool according to claim 1, characterized in that, The connecting channel (13) extends from the lower dissolving tank to the water passage hole in the partition wall between it and the multi-functional central channel (14); the main water inlet pipe (1) in the pipe gallery is connected to the main water inlet channel (3) from the bottom plate, and the main water inlet pipe (1) is equipped with a main water inlet valve (2); the main flushing water pipe (27) in the pipe gallery leads down to the flushing water pipe of the single-cell dissolving tank and connects to the inlet pipe (6) of the single-cell dissolving tank, and the single-cell flushing water pipe is equipped with a pneumatic valve two (25); the pneumatic regulating valve one (7) on the inlet pipe of the single-cell dissolving tank and the pneumatic valve two (25) on the single-cell flushing water pipe are controlled to switch, so as to realize the switching of the demineralized water inlet and the flushing water inlet of the dissolving tank.

13. The mineralization treatment pool according to claim 1, characterized in that, The main flushing water pipe (27) in the pipe gallery leads upward to the flushing water pipe of the individual sand filter, which is connected to the outlet pipe of the individual sand filter. The individual flushing water pipe is equipped with a pneumatic valve one (24). The pneumatic regulating valve two (23) on the outlet pipe of the individual sand filter and the pneumatic valve one (24) on the individual flushing water pipe are controlled to switch, so as to realize the switching between the sand filter outlet and the flushing water inlet.

14. The mineralization treatment pool according to claim 1, characterized in that, A vent pipe (28a) is led out from the main vent pipe (28) in the pipe gallery to the single-cell dissolution tank. The vent pipe (28a) of the single-cell dissolution tank is flush with the bottom of the flushing pipe of the single-cell dissolution tank. A pneumatic valve three (29) is installed on the vent pipe of the single cell.

15. The mineralization treatment pool according to claim 1, characterized in that, The flushing air main pipe (35) in the pipe gallery is led out to the flushing air pipes of the bottom distribution channel (7a) and the middle distribution channel (20) of the central channel to introduce air during the air flushing of the dissolving tank and the sand filter tank; the flushing air pipes of the bottom distribution channel (7a) and the middle distribution channel (20) of the central channel are connected to the top and are respectively equipped with pneumatic valve four (32) and pneumatic valve five (33); the bottom distribution channel (7a) and the middle distribution channel (20) of the central channel are equipped with exhaust pipes, which are connected to the top of the flushing air pipes of the distribution channel and are respectively equipped with pneumatic valves; the exhaust main pipe (37) is connected above the highest water level of the mineralization treatment tank.

16. The mineralization treatment pool according to claim 1, characterized in that, The end of the multifunctional central channel (14) is equipped with a drainage gate; when the single-cell treatment tank is flushed after the filler is added, the drainage gate is opened and the flushing wastewater of the dissolving tank and sand filter tank is discharged to the drainage channel through the drainage gate.

17. The mineralization treatment pool according to claim 16, characterized in that, The drainage ditch is equipped with a main drainage pipe to discharge the collected flushing wastewater.

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