Mineralization dissolution tank with constant filling height

Abstract

The utility model discloses a kind of mineralization dissolving tank of constant packing height, including tank body, tank body has sequentially communicated water inlet air inlet system, water inlet air inlet distribution system, upward flow packing dissolution zone and water outlet air outlet system, water inlet air inlet distribution system is located in the downside of upward flow packing dissolution zone, the dissolution reaction of mineralization packing occurs in upward flow packing dissolution zone, water outlet air outlet system includes the water collection flow guide structure of being set in the upside of upward flow packing dissolution zone, water collection flow guide structure divides the upside area of upward flow packing dissolution zone into feeding area and catchment area, the packing height below feeding area is higher than the packing height below catchment area by certain distance.The effective height of limestone-like packing of the utility model mineralization dissolving tank is constant, so that water production mineralization degree is stable, mineralization water outlet passage is separated from feeding area, can effectively control effluent turbidity when packing is replenished, can also ensure effluent turbidity stable when limestone-like packing is replenished, can be widely applied to the re-mineralization, re-stabilization of various desalted water.

Description

Technical Field

[0001] This utility model belongs to the field of water treatment technology, specifically relating to a mineralization dissolution tank with constant packing height. Background Technology

[0002] Freshwater resources are scarce in coastal areas of northern my country, and even more so in island regions, but abundant in surrounding seawater. Desalinated seawater, as an unconventional water resource, has become an important component of water use in these coastal and island areas. Similarly, while water resources are scarce in Northwest my country, brackish water is widely distributed, and desalinated brackish water, as an unconventional water resource, has become an important supplement to water use in these water-scarce regions. 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 desalinated brackish water need to undergo mineralization treatment to increase alkalinity, hardness, and the required mineral ions to protect water distribution networks and water facilities while meeting the demand for beneficial mineral ions.

[0003] 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 after adding limestone packing, longer flushing time, waste of flushing water, and waste of limestone packing. As the mineralization dissolution time increases, the thickness of the packing layer gradually decreases, the dissolution time decreases, and the alkalinity of calcium ions and bicarbonate ions dissolved in the desalinated water decreases accordingly, resulting in a decrease in the degree of mineralization. Due to the influence of turbidity, it is not possible to frequently add packing. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a mineralization dissolution tank with a constant packing height to overcome the shortcomings of the prior art.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0006] A mineralization dissolution tank with constant packing height is provided, comprising a tank body having a water inlet and air inlet system, a water inlet and air inlet distribution system, an upward flow packing dissolution zone, and a water outlet and air outlet system connected in sequence. The water inlet and air inlet distribution system is located below the upward flow packing dissolution zone, where the dissolution reaction of the mineralized packing occurs. The water outlet and air outlet system includes a water collection and guiding structure disposed above the upward flow packing dissolution zone, which divides the area above the upward flow packing dissolution zone into a feeding zone and a water collection zone. The packing height below the feeding zone is higher than the packing height below the water collection zone by a certain distance.

[0007] As described in the mineralization dissolution tank with constant packing height, the water and air inlet system includes a water inlet pipe, a regulating water inlet pneumatic valve, a flushing water pipe, a flushing water pneumatic valve, a flushing air pipe, and a flushing air pneumatic valve.

[0008] As described in the mineralization dissolution tank with constant packing height, the water and air distribution system includes a water distribution channel, a water distribution riser, an air distribution riser, and a water and air distribution bread pipe. The water distribution channel is located in the middle area of ​​the bottom of the tank body. The water distribution channel is connected to the water inlet pipe and is connected to the water and air distribution bread pipe through the water distribution riser and the air distribution riser. The water and air distribution bread pipe is arranged on the bottom side of the upward flow packing dissolution zone.

[0009] As described in the mineralization dissolving tank with constant filler height, the top of the water inlet distribution channel is provided with an openable cover plate, the space between the outer sidewall of the water inlet distribution channel and the inner wall of the tank body is filled with plain concrete, and the top of the plain concrete is flush with the cover plate located at the top of the water inlet distribution channel.

[0010] As in the mineralization dissolution tank with constant filler height, the top of the cover plate of the water inlet distribution channel and the top of the plain concrete are filled with a support layer, and the water and air distribution bread pipe is located within the support layer.

[0011] As described in the mineralization dissolution tank with constant packing height, the tank body is cylindrical, and the water collection and guiding structure includes a vertically arranged central water outlet passage and several horizontally arranged peripheral water outlet passages. The peripheral water outlet passages are evenly arranged around the central water outlet passage and radially arranged along the cross-section of the tank body. An annular central water collection trough is provided in the central water outlet passage, and a linear peripheral water collection trough is provided in the peripheral water outlet passage. The annular central water collection trough is also connected to a confluence trough, and the annular central water collection trough is connected to the water and gas outlet system through the confluence trough.

[0012] As described in the mineralization dissolution tank with constant packing height, the water and air outlet system further includes a water outlet pipe, a flushing wastewater pipe, a regulating flushing wastewater pneumatic valve, a vent pipe, a regulating venting pneumatic valve, an exhaust pipe, an exhaust pneumatic valve, and a vent hole. The exhaust pipe is connected above the highest water level in the tank, and the vent hole is located at the top of the tank. The manifold and the flushing wastewater pipe are respectively connected to the water outlet pipe.

[0013] The beneficial effects of this utility model's technical solution are:

[0014] The effective height of the limestone-like packing in the mineralization dissolution tank of this utility model is constant, which makes the mineralization of the produced water stable. The separation of the mineralized water outlet passage and the feeding area can effectively control the turbidity of the effluent when replenishing the packing. The turbidity of the effluent can also be kept stable when replenishing the limestone-like packing. It can be widely used for the remineralization and restabilization of various demineralized water. Attached Figure Description

[0015] To further illustrate the above-mentioned objectives, structural features, and effects of this utility model, the following will describe this utility model in detail with reference to the accompanying drawings.

[0016] Figure 1 This is a plan view of the stainless steel water collection tank and stainless steel central tank of the preferred embodiment of the mineralization dissolving tank of this utility model.

[0017] Figure 2 for Figure 1 Sectional view of AA;

[0018] Figure 3 for Figure 1 BB section view;

[0019] Figure 4 This is a plan view of the stainless steel outlet of the mineralization dissolving tank, which is a preferred embodiment of this utility model.

[0020] Figure 5 This is a plan view of the packing area of ​​the mineralization dissolution tank according to a preferred embodiment of the present invention;

[0021] Figure 6 This is a plan view of the supporting layer and bread tube of the mineralization dissolution tank in a preferred embodiment of this utility model;

[0022] Figure 7 This is a plan view of the inlet water distribution channel of the mineralization dissolution tank according to a preferred embodiment of the present invention;

[0023] Figure 8 for Figure 7 CC section view;

[0024] Figure 9 for Figure 7 DD section view;

[0025] In the diagram: 1. Tank body; 2. Upward flow packing dissolution zone; 3. Feeding zone; 4. Water inlet pipe; 5. Regulating inlet pneumatic valve; 6. Flushing water pipe; 7. Flushing water pneumatic valve; 8. Flushing air pipe; 9. Flushing air pneumatic valve; 10. Water inlet distribution channel; 11. Water distribution riser; 12. Air distribution riser; 13. Water and air distribution distribution pipes; 14. Plain concrete; 15. Support layer; 16. Central water outlet passage; 17. Peripheral water outlet passage; 18. Annular central water collection trough; 19. Linear peripheral water collection trough; 20. Merging trough; 21. Water outlet pipe; 22. Regulating outlet pneumatic valve; 23. Flushing wastewater pipe; 24. Regulating flushing wastewater pneumatic valve; 25. Vent pipe; 26. Regulating venting pneumatic valve; 27. Exhaust pipe; 28. Exhaust pneumatic valve; 29. ​​Spillway weir. Detailed Implementation

[0026] The terms “utility model” and “this utility model” used in this specification are intended to broadly refer to all subject matter of this specification and any of the following patent claims. Statements containing these terms should not be construed as limiting the subject matter described herein or limiting the meaning or scope of any of the following patent claims. Furthermore, this specification does not attempt to describe or limit the subject matter covered by any claim of any particular component, paragraph, statement, or drawing of this application. The subject matter should be understood with reference to the entire specification, all drawings, and any of the following claims. This utility model may have other embodiments and be practiced or implemented in other ways. Moreover, it should be understood that the wording and terminology used herein are for illustrative purposes and should not be considered limiting.

[0027] The details of the present invention will now be discussed with reference to the accompanying drawings, which are illustrated by way of example only. In the drawings, similar features or components may be labeled with the same reference numerals.

[0028] The use of the terms "comprising," "having," and "including," and variations thereof, herein means to include the items listed herein, their equivalents, and additional items. While reference may be made in the description of the drawings to directions such as above, below, upward, downward, backward, bottom, top, front, rear, etc., for convenience, reference is made relative to the drawings. These directions are not intended to literally accept or limit the invention in any form. Furthermore, terms such as "first," "second," "third," etc., are used herein for illustrative purposes and are not intended to indicate or imply importance or significance.

[0029] This utility model of a mineralization and dissolution tank with constant packing height is mainly used for the remineralization and restabilization of desalinated seawater and brackish water. After mineralization and stabilization, the desalinated water from unconventional water resources (seawater and brackish water) is supplied to municipal public water, agricultural irrigation water, and industrial water. (See also...) Figures 1 to 9As shown, this utility model includes a tank body 1, which has a water and air inlet system, a water and air inlet distribution system, an upward flow packing dissolution zone 2, and a water and air outlet system connected in sequence. The water and air inlet distribution system is located below the upward flow packing dissolution zone 2, where the dissolution reaction of the mineralized packing occurs. The water and air outlet system includes a water collection and guiding structure disposed above the upward flow packing dissolution zone 2, which divides the area above the upward flow packing dissolution zone 2 into a feeding zone 3 and a water collection zone. The height of the packing below the feeding zone 3 is higher than the height of the packing below the water collection zone by a certain distance. The tank body 1 has a tank lid, which is opened for feeding.

[0030] The water and air intake system includes a water intake pipe 4, a regulating water intake pneumatic valve 5, a flushing water pipe 6, a flushing water pneumatic valve 7, a flushing air pipe 8, and a flushing air pneumatic valve 9.

[0031] The water and air distribution system includes a water distribution channel 10, a water distribution riser 11, an air distribution riser 12, and a water and air distribution bread pipe 13. The water distribution channel 10 is located in the middle area of ​​the bottom inside the tank 1. The water distribution channel 10 is connected to the water inlet pipe 4 and is connected to the water and air distribution bread pipe 13 through the water distribution riser 11 and the air distribution riser 12. The water and air distribution bread pipe 13 is arranged on the bottom side of the upward flow packing dissolution zone 2.

[0032] The inlet pipe 4 is connected to the lower part of the inlet distribution channel 10, and a regulating inlet pneumatic valve 5 is installed. The flushing water pipe 6 is connected to the inlet pipe 4, and a switching valve is installed to switch between inlet and flushing water intake. The connection point between the flushing water pipe 6 and the inlet pipe 4 is located on the pipe section between the regulating inlet pneumatic valve 5 and the tank body 1. A flushing water pneumatic valve 7 is installed on the flushing water pipe 6. The flushing air pipe 8 is connected to the upper part of the inlet distribution channel 10, and a flushing air pneumatic valve 9 is installed at the top to introduce air during the air flushing of the dissolving tank.

[0033] An openable cover is provided on the top of the water inlet distribution channel 10. The space between the outer sidewall of the water inlet distribution channel 10 and the inner wall of the tank 1 is filled with plain concrete 14, and the top of the plain concrete 14 is flush with the cover on the top of the water inlet distribution channel 10. Specifically, the water distribution riser 11 and the air distribution riser 12 are provided on the cover of the water inlet distribution channel 10. The two ends of the water distribution riser 11 and the air distribution riser 12 extend into the water inlet distribution channel 10 and the water and air distribution pipe 13, respectively. The water distribution riser 11 transfers demineralized water and flushing water and enters the water and air distribution pipe 13 from the water inlet distribution channel 10. The air distribution riser 12 transfers flushing air and enters the water and air distribution pipe 13 from the water inlet distribution channel 10.

[0034] The top of the cover plate of the inlet distribution channel 10 and the top of the plain concrete 14 are filled with a support layer 15, and the water and air distribution pipes 13 are located within the support layer 15. Further, the support layer 15 is made of coarse sand with an effective particle size of 2.0–4.0 mm and a thickness of 0.35 m. The upward flow packing dissolution zone 2 located above the support layer 15 is filled with limestone-like minerals, which can react with the demineralized water to provide the required mineral ions to the demineralized water according to the water quality requirements. The effective particle size of the limestone-like mineral packing particles is 0.9–1.2 mm, and the packing height is 1.2–2.6 m.

[0035] Referring to the diagram, tank 1 is cylindrical. The water collection and guiding structure includes a vertically arranged central water outlet passage 16 and several horizontally arranged peripheral water outlet passages 17. The peripheral water outlet passages 17 are evenly arranged around the central water outlet passage 16 and radially arranged along the cross-section of tank 1. The central water outlet passage 16 is provided with an annular central water collection trough 18, and the peripheral water outlet passages 17 are provided with linear peripheral water collection troughs 19. The annular central water collection trough 18 is also connected to a confluence channel 20. The annular central water collection trough 18 is connected to the water and air outlet system through the confluence channel 20.

[0036] Based on the above-mentioned water collection and diversion structure, the water and air outlet system also includes a water outlet pipe 21, a regulating water outlet pneumatic valve 22, a flushing wastewater pipe 23, a regulating flushing wastewater pneumatic valve 24, a vent pipe 25, a regulating venting pneumatic valve 26, an exhaust pipe 27, an exhaust pneumatic valve 28, and a vent hole. The exhaust pipe 27 is connected above the highest water level in the tank 1, and the vent hole is located at the top of the tank 1. The manifold 20 and the flushing wastewater pipe 23 are respectively connected to the water outlet pipe 21.

[0037] A regulating pneumatic valve 22 is installed on the outlet pipe 21. The flushing wastewater pipe 23 is connected to the outlet pipe 21 and is equipped with a switching valve to switch between outlet water and flushing wastewater. The vent pipe 25 is flush-connected to the bottom of the inlet pipe 4, with the connection point located on the pipe section between the regulating inlet pneumatic valve 5 and the tank 1. A regulating vent valve 26 is installed on the vent pipe 25. An exhaust pipe 27 is installed on the inlet distribution channel 10 and connected to the top of its flushing air pipe 8, with an exhaust pneumatic valve 28 installed. The flushing wastewater pipe 23 is connected to the outlet pipe 21, with the connection point located on the lower horizontal pipe section between the regulating outlet pneumatic valve 22 and the tank 1. A regulating flushing wastewater pneumatic valve 24 is installed on the flushing wastewater pipe 23.

[0038] The control switching of the regulating inlet pneumatic valve 5 on the inlet pipe 4, the flushing water pneumatic valve 7 on the flushing water pipe 6, and the regulating venting pneumatic valve 26 on the venting pipe 25 realizes the switching of demineralized water inlet, flushing water inlet, and venting of the dissolving tank.

[0039] The height of the packing material below feeding zone 3 is approximately 100–500 mm higher than the height of the packing material below the water collection zone. Therefore, the height of the limestone-like packing material remains constant. As the mineralization dissolving tank operates for an extended period, the limestone-like packing material is continuously consumed, but the effective contact height and effective contact time remain constant. This ensures stable mineralization indicators of the effluent from the mineralization dissolving tank. Packing material can be replenished during operation without causing an increase in effluent turbidity.

[0040] Furthermore, the water collection and guiding structure extends downward from about 150 mm below the top of the tank to the surface of the limestone-like mineral packing at a constant height, including a central water outlet passage 16 in the shape of a circular cylinder and five peripheral water outlet passages 17 in the shape of cuboids. Above the upward flow packing dissolution zone 2, a feeding zone 3 with a 5-part fan-shaped cross section and a feeding zone 3 with a circular cross section located at the center of the tank body 1 are formed.

[0041] A weir 29 is installed in the central water outlet passage 16 to collect the water from the dissolution zone 2 of the upward flow packing and lead the water to the water outlet pipe 21.

[0042] The central water outlet passage 16, the peripheral water outlet passage 17, the central water collection trough 18, the linear peripheral water collection trough 19, the confluence trough 20, and the spillway 29 are all made of corrosion-resistant materials and meet relevant water quality and hygiene standards.

[0043] The demineralized water enters the inlet distribution channel 10 through the inlet pipe 4, and is then transferred to the water and air distribution bread pipe 13 via the water distribution riser 11 and the air distribution riser 12. From there, it is evenly distributed to the dissolving tank section. In the upward-flowing packing dissolution zone 2, a dissolution reaction of the mineralized packing occurs, increasing the alkalinity, hardness, and nutrient ions of the demineralized water. The mineralized demineralized water flows upward through the outlet passage and is collected by the central collection trough 18 and the linear peripheral collection trough 19 located within the outlet passage. It converges in the confluence channel 20 and is then introduced into the outlet pipe 21.

[0044] During normal operation, demineralized water enters the inlet distribution channel 10 through the inlet pipe 4. It is then transported to the water and air distribution bread pipe 13 via the water distribution riser 11 and air distribution riser 12. The demineralized water is evenly distributed to the dissolving tank section by the water and air distribution bread pipe 13. In the upward-flowing packing dissolution zone 2, a dissolution reaction of the mineralized packing occurs, increasing the alkalinity, hardness, and nutrient ions of the demineralized water. The mineralized demineralized water flows upward through the central outlet passage 16 and is collected by the annular central collection trough 18 and the linear peripheral collection trough 19 located within the outlet passage. It converges in the confluence channel 20 and is then introduced into the outlet pipe 21. At this time, the regulating inlet pneumatic valve 5 and the regulating outlet pneumatic valve 22 are open, while the flushing water pneumatic valve 7, the regulating flushing wastewater pneumatic valve 24, the flushing air pneumatic valve 9, the exhaust pneumatic valve 28, and the regulating venting air pneumatic valve 26 are closed.

[0045] During water flushing, flushing water is introduced through flushing water pipe 6, enters water distribution channel 10 via inlet pipe 4, and is then transported to water and air distribution bread pipe 13 via water distribution riser pipe 11 and air distribution riser pipe 12. The flushing water is then evenly distributed to the cross-section of the dissolving tank by the water and air distribution bread pipe 13, flowing upwards to flush the packing material. Flushing wastewater flows upwards through the central outlet passage 16, is collected by the annular central collection trough 18 and linear peripheral collection trough 19 located within the outlet passage, converges in the confluence channel 20, and then flows into outlet pipe 21 before exiting through flushing wastewater pipe 23. At this time, flushing water pneumatic valve 7 and regulating flushing wastewater pneumatic valve 24 are open, while regulating inlet pneumatic valve 5, regulating outlet pneumatic valve 22, flushing air pneumatic valve 9, exhaust pneumatic valve 28, and regulating venting pneumatic valve 26 are closed.

[0046] During air flushing, flushing air enters the inlet distribution channel 10 through the flushing air pipe 8. It is then transported to the water and air distribution pipe 13 via the water distribution riser 11 and the air distribution riser 12. The flushing air is evenly distributed to the dissolving tank cross-section by the water and air distribution pipe 13, flowing upwards to flush the packing material. The flushing air exits upwards through the central outlet passage 16 to the vent at the top of the dissolving tank. At this time, the flushing air pneumatic valve 9 is open, while the regulating inlet water pneumatic valve 5, regulating outlet water pneumatic valve 22, flushing water pneumatic valve 7, regulating flushing wastewater pneumatic valve 24, exhaust pneumatic valve 28, and regulating venting air pneumatic valve 26 are closed. When air flushing ends and exhaust occurs, the exhaust pneumatic valve 28 is opened, while the regulating inlet water pneumatic valve 5, regulating outlet water pneumatic valve 22, flushing water pneumatic valve 7, regulating flushing wastewater pneumatic valve 24, flushing air pneumatic valve 9, and regulating venting air pneumatic valve 26 are closed, thus removing residual air from the inlet distribution channel 10.

[0047] When venting, the regulating pneumatic vent valve 26 is opened, and the regulating pneumatic inlet valve 5, the regulating pneumatic outlet valve 22, the flushing water pneumatic valve 7, the regulating flushing wastewater pneumatic valve 24, the flushing air pneumatic valve 9, and the exhaust pneumatic valve 28 are closed, thus venting the dissolving tank.

[0048] Understandably, in order to prevent the packing from dissolving and caking (downward flow generates velocity pressure, which makes the packing more compacted and caking), an upward flow system is adopted in this case.

[0049] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A mineralization dissolution tank with constant packing height, characterized in that, The device includes a tank body, which has a water and air inlet system, a water and air inlet distribution system, an upward flow packing dissolution zone, and a water and air outlet system connected in sequence. The water and air inlet distribution system is located below the upward flow packing dissolution zone, where the mineralized packing undergoes a dissolution reaction. The water and air outlet system includes a water collection and guiding structure disposed above the upward flow packing dissolution zone. The water collection and guiding structure divides the area above the upward flow packing dissolution zone into a feeding zone and a water collection zone. The height of the packing below the feeding zone is higher than the height of the packing below the water collection zone by a certain distance.

2. The mineralization and dissolving tank with constant packing height as described in claim 1, characterized in that, The water and air intake system includes a water intake pipe, a regulating water intake pneumatic valve, a flushing water pipe, a flushing water pneumatic valve, a flushing air pipe, and a flushing air pneumatic valve.

3. The mineralization and dissolving tank with constant packing height as described in claim 2, characterized in that, The water and air distribution system includes a water distribution channel, a water distribution riser, an air distribution riser, and a water and air distribution bread pipe. The water distribution channel is located in the middle area of ​​the bottom of the tank body. The water distribution channel is connected to the water inlet pipe and is connected to the water and air distribution bread pipe through the water distribution riser and the air distribution riser. The water and air distribution bread pipe is arranged on the bottom side of the upward flow packing dissolution zone.

4. The mineralization and dissolving tank with constant packing height as described in claim 3, characterized in that, The top of the water inlet distribution channel is provided with an openable cover plate. The space between the outer side wall of the water inlet distribution channel and the inner wall of the tank is filled with plain concrete. The top of the plain concrete is flush with the cover plate located at the top of the water inlet distribution channel.

5. The mineralization and dissolving tank with constant packing height as described in claim 4, characterized in that, The top of the cover plate of the water inlet distribution channel and the top of the plain concrete are filled with a support layer, and the water and air distribution bread pipe is located within the support layer.

6. The mineralization and dissolving tank with constant packing height as described in claim 1, characterized in that, The tank is cylindrical, and the water collection and guiding structure includes a vertically arranged central water outlet passage and several horizontally arranged peripheral water outlet passages. The peripheral water outlet passages are evenly arranged around the central water outlet passage and radially arranged along the cross-section of the tank. The central water outlet passage is provided with an annular central water collection trough, and the peripheral water outlet passages are provided with linear peripheral water collection troughs. The annular central water collection trough is also connected to a confluence trough, and the annular central water collection trough is connected to the water and air outlet system through the confluence trough.

7. The mineralization and dissolving tank with constant packing height as described in claim 6, characterized in that, The water and air outlet system also includes a water outlet pipe, a flushing wastewater pipe, a regulating flushing wastewater pneumatic valve, a vent pipe, a regulating venting pneumatic valve, an exhaust pipe, an exhaust pneumatic valve, and a vent hole. The exhaust pipe is connected above the highest water level in the tank. The vent hole is located at the top of the tank. The manifold and the flushing wastewater pipe are respectively connected to the water outlet pipe.

Images