Calcium removal reaction device for high-calcium wastewater

Abstract

The application discloses a high-calcium wastewater calcium removal reaction device, and relates to the technical field of calcium removal of wastewater. The high-calcium wastewater calcium removal reaction device comprises a calcium removal box, a filter box and a filter net basket. The high-calcium wastewater calcium removal reaction device has the effect of adjusting the calcium removal performance, air is introduced into wastewater in the form of aeration, the amount of carbon dioxide in the wastewater is reduced, the carbonic acid balance is broken, the balance system in the water body continuously moves to the direction of generating CO3 2‑ , calcium ions are combined with the CO3 to generate calcium carbonate crystals, calcium removal is facilitated, the first stirring plate and the second stirring plate are reversely rotated to stir, calcium ions are fully combined with carbonate ions, the removal of calcium ions is accelerated, and the practicability is improved.

Description

Technical Field

[0001] This invention relates to the field of calcium removal technology for wastewater, specifically a calcium removal reaction device for high-calcium wastewater. Background Technology

[0002] Hardness can cause problems such as scaling during water treatment and usage, seriously affecting daily life and industrial production. Excessive hardness can also impact wastewater treatment processes. Therefore, removing hardness ions from water is the fundamental way to solve scaling, improve water treatment efficiency, and purify water quality. Currently, various technologies such as chemical precipitation, nanofiltration, reverse osmosis, and electrodialysis can be used for water softening; however, each technology has its limitations. Chemical precipitation methods mainly include lime softening and its combined processes, such as lime / soda softening and lime / soda / phosphoric acid softening. These methods can treat wastewater with high calcium content; however, the addition of multiple chemical agents not only increases treatment costs, but lime slurry also causes the pH of the water to rise, requiring acid to be added to adjust the pH of the effluent, potentially causing secondary pollution. Furthermore, adding lime slurry increases the production of calcium carbonate, a solid waste.

[0003] In existing technologies, calcium removal is mostly achieved by adding chemical agents. This method not only increases the treatment cost but may also cause secondary pollution. The calcium removal effect is poor, and this patent is not convenient for filtering the calcium carbonate precipitated in the water. The invention of a calcium removal reaction device for high-calcium wastewater solves the above problems. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a calcium removal reaction device for high-calcium wastewater, which possesses the aforementioned advantages and solves the problems mentioned in the background technology.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: a calcium removal reaction device for high-calcium wastewater, comprising a calcium removal tank, a filter tank, and a filter basket. A servo motor and a pump-type aerator are respectively installed on the top of the calcium removal tank. An aeration pipe is provided at the output end of the pump-type aerator. A frame-shaped partition is installed on the inner top wall of the calcium removal tank. A rotatable first round rod and a second round rod are respectively installed inside the frame-shaped partition. A driving gear and a first stirring plate are respectively installed on the outer surface of the first round rod, and a driven gear and a second stirring plate are respectively installed on the outer surface of the second round rod. Support plates are installed on both the inner front and inner rear walls of the filter tank. A rectangular plate abuts against the top of the support plate. A first rectangular frame is installed on one side of the rectangular plate, and a mating plate is installed at the bottom of the first rectangular frame. A second rectangular frame is installed on the top of the filter basket. The filter box has a rectangular frame. The interior of the second rectangular frame has a cavity. A support spring and a contact switch are installed on the inner top wall of the cavity. A horizontal plate is installed at the end of the support spring, and a contact rod is installed at the top of the horizontal plate. A battery is installed on the inner bottom wall of the cavity. An alarm is installed at the top of the rectangular plate. Adjustment boxes are installed at the front and rear of the filter box. A pull rod is inserted into the interior of the adjustment box. A convex slider is installed on one side of the pull rod, and a limit spring is installed at the top of the convex slider. A limit rod is installed on the other side of the pull rod. A fixing plate is installed on the inner top wall of the filter box. An electro-hydraulic push rod is installed on one side of the fixing plate. An adjusting block is installed at the movable end of the electro-hydraulic push rod, and a positioning slider is installed in front of the adjusting block. A connecting rod is rotatably connected to the inner wall of the filter box via a shaft, and an impact block is installed at the end of the connecting rod.

[0008] Preferably, the driving gear meshes with the driven gear through teeth, and the first round rod and the driving gear are at the same center, the second round rod and the driven gear are at the same center, the driving gear is positioned higher than the first stirring plate, the driven gear is positioned higher than the second stirring plate, and both the driving gear and the driven gear are located inside the frame-shaped partition.

[0009] Preferably, the mating plate is installed on one side of the horizontal plate, the end of the mating plate is located inside the cavity, and the position of the contact rod corresponds to the position of the contact switch.

[0010] Preferably, the position of the first rectangular frame is higher than the position of the second rectangular frame, and a handle is installed on the top of the first rectangular frame, with the highest position of the handle being lower than the inner top wall of the filter box.

[0011] Preferably, the inner wall of the regulating box is provided with a convex groove with a depth in the front-back direction and a length in the up-down direction. The end of the convex slider is located inside the convex groove, and the convex slider can slide along the length direction of the convex groove. The limiting spring is installed inside the convex groove.

[0012] Preferably, the top of the rectangular plate has a limiting groove with a depth in the vertical direction, the end of the limiting rod is inserted into the limiting groove, and the cross-section of the support plate is L-shaped.

[0013] Preferably, the connecting rod has a positioning groove with a depth in the front-to-back direction. The end of the positioning slider is located inside the positioning groove. The positioning slider can slide along the length of the positioning groove. The position of the impact block corresponds to the position of the filter basket.

[0014] Preferably, the first round rod is installed at the output end of the servo motor, and the first round rod and the shaft of the output end of the servo motor are at the same center. The servo motor and the pump-type aerator are both electrically connected to an external power source through wires, and the battery is electrically connected to a contact switch and an alarm through wires respectively.

[0015] Preferably, an inlet pipe is installed on one side of the calcium removal box, and a delivery pipe is installed on the other side of the calcium removal box. A valve is installed inside the delivery pipe, and the other end of the delivery pipe is connected to the top of the filter box. A drain pipe is installed on one side of the filter box, and a drain cap is installed at the end of the drain pipe. A rectangular through groove is opened on the top of the filter box. The length and width of the filter basket are both smaller than the length and width of the rectangular through groove. The aeration pipe is fixedly connected to the inner wall and the inner bottom wall of the calcium removal box, respectively. The inner bottom walls of both the calcium removal box and the filter box are inclined. The inner bottom wall of the calcium removal box is higher on the left and lower on the right, while the inner bottom wall of the filter box is lower on the left and higher on the right. The calcium removal box is installed on top of the filter box.

[0016] (III) Beneficial Effects

[0017] Compared with the prior art, the present invention provides a calcium removal reaction device for high-calcium wastewater, which has the following features:

[0018] Beneficial effects:

[0019] 1. This high-calcium wastewater calcium removal reactor, through the arrangement of a servo motor, a pump-type aerator, aeration pipe, frame-shaped baffle, first round rod, second round rod, driving gear, first stirring plate, driven gear, and second stirring plate, enables the high-calcium wastewater calcium removal reactor to achieve the effect of enhancing calcium removal performance. Air is introduced into the wastewater through aeration to reduce the amount of carbon dioxide in the wastewater. Disrupting the carbonic acid balance, the equilibrium system in the water continuously shifts towards CO3 production. 2- The stirring action proceeds in the direction of calcium ions, allowing them to combine with calcium ions to form calcium carbonate crystals, which facilitates calcium removal. The meshing of the driving gear and the driven gear facilitates the counter-rotation of the first and second stirring plates, enabling the carbonate ions to fully combine with the calcium ions and accelerating the removal of calcium ions, thereby improving practicality.

[0020] 2. This high-calcium wastewater calcium removal reactor, through the arrangement of a support plate, rectangular plate, first rectangular frame, matching plate, second rectangular frame, support spring, contact switch, horizontal plate, contact rod, battery, alarm, regulating box, pull rod, convex slider, limit spring, and limit rod, enables the high-calcium wastewater calcium removal reactor to easily filter calcium carbonate crystals. When the amount of calcium carbonate crystals in the filter basket reaches a certain level, it conveniently alerts the staff and facilitates the removal of the calcium carbonate crystals. The position of the contact rod corresponds to the position of the contact switch, facilitating alarm notification. The limit rod restricts the position of the filter basket, making it easy to disassemble the filter basket and remove the calcium carbonate crystals, thus improving its practicality.

[0021] 3. This high-calcium wastewater calcium removal reaction device, through the setting of a fixed plate, an electric hydraulic push rod, an adjusting block, a positioning slider, a connecting rod, and an impact block, enables the high-calcium wastewater calcium removal reaction device to avoid clogging of the filter basket. The impact block knocks on the filter basket, which acts as a vibrating screen, thus preventing the filter basket from clogging and achieving the purpose of improving practicality. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a frontal cross-sectional view of the present invention;

[0024] Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A in the middle;

[0025] Figure 4 For the present invention Figure 2 Enlarged structural diagram at point B;

[0026] Figure 5 This is a top view of the structure of the present invention;

[0027] Figure 6 This is a side view cross-sectional structural diagram of the present invention;

[0028] Figure 7 For the present invention Figure 6 Enlarged structural diagram at point C.

[0029] In the diagram: 1. Calcium removal box; 2. Filter box; 3. Filter basket; 4. Servo motor; 5. Pump-type aerator; 6. Aeration pipe; 7. Frame-shaped partition; 8. First round rod; 9. Second round rod; 10. Drive gear; 11. First stirring plate; 12. Driven gear; 13. Second stirring plate; 14. Support plate; 15. Rectangular plate; 16. First rectangular frame; 17. Mating plate; 18. Second rectangular frame; 19. Support spring; 20. Contact point 21. Switch; 22. Horizontal plate; 23. Contact rod; 24. Battery; 25. Alarm; 26. Adjustment box; 27. Pull rod; 28. Convex slider; 29. ​​Limit spring; 30. Limit rod; 31. Fixing plate; 32. Electro-hydraulic push rod; 33. Adjustment block; 34. Positioning slider; 35. Connecting rod; 36. Impact block; 37. Handle; 38. Water inlet pipe; 39. Conveying pipe; 40. Valve; 41. Drain pipe; 42. Drain cap. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1

[0032] Please see Figures 1 to 3This invention provides a technical solution: a calcium removal reaction device for high-calcium wastewater, comprising a calcium removal tank 1, a filter tank 2, and a filter basket 3. An inlet pipe 37 is installed on one side of the calcium removal tank 1, and a conveying pipe 38 is installed on the other side of the calcium removal tank 1. A valve 39 is installed inside the conveying pipe 38, and the other end of the conveying pipe 38 is connected to the top of the filter tank 2. A drain pipe 40 is installed on one side of the filter tank 2, and a drain cap 41 is installed at the end of the drain pipe 40. A rectangular opening is provided on the top of the filter tank 2. The length and width of the filter basket 3 are both smaller than the length and width of the rectangular channel. The aeration pipe 6 is fixedly connected to the inner wall and bottom wall of the calcium removal box 1, respectively. The inner bottom walls of both the calcium removal box 1 and the filter box 2 are inclined, with the inner bottom wall of the calcium removal box 1 being higher on the left and lower on the right, and the inner bottom wall of the filter box 2 being lower on the left and higher on the right. The calcium removal box 1 is installed on top of the filter box 2. A servo motor 4 and a pump-type aerator 5 are installed on the top of the calcium removal box 1. The output end of the pump-type aerator 5 is equipped with an aeration pipe 6. The inner wall of the calcium removal box 1... A frame-shaped partition 7 is installed on the top wall. Inside the frame-shaped partition 7, a rotatable first round rod 8 and a second round rod 9 are respectively arranged. The first round rod 8 is installed at the output end of the servo motor 4, and the first round rod 8 and the shaft of the output end of the servo motor 4 are at the same center. The servo motor 4 and the pump-type aerator 5 are electrically connected to an external power source through wires. The battery 23 is electrically connected to the contact switch 20 and the alarm 24 through wires respectively. The outer surface of the first round rod 8 is respectively equipped with a drive gear 10 and a first stirring plate 11. The drive gear 10 meshes with the driven gear 12 through teeth, and the first round rod 8 and the drive gear 10 are at the same center. The second round rod 9 and the driven gear 12 are at the same center. The position of the drive gear 10 is higher than the position of the first stirring plate 11, and the position of the driven gear 12 is higher than the position of the second stirring plate 13. The drive gear 10 and the driven gear 12 are both located inside the frame-shaped partition 7. The outer surface of the second round rod 9 is respectively equipped with the driven gear 12 and the second stirring plate 13.

[0033] During operation, wastewater enters the calcium removal tank 1 through the inlet pipe 37. Air is then introduced into the wastewater inside the tank via a pump-type aerator 5 and aeration pipe 6, reducing the amount of carbon dioxide in the wastewater and disrupting the carbonic acid balance. This causes the equilibrium system in the water body to continuously shift towards CO3 generation. 2- The first rod 8 rotates in the opposite direction, causing the carbonate ions to combine with calcium ions to form calcium carbonate crystals, thus removing calcium. The servo motor 4 drives the first rod 8 to rotate, causing the first stirring plate 11 to stir. The driving gear 10 meshes with the driven gear 12, causing the second rod 9 to rotate, causing the second stirring plate 13 to stir. The rotation of the first rod 8 and the second rod 9 is opposite, which facilitates the full combination of calcium ions and carbonate ions to form calcium carbonate crystals, thus facilitating the removal of calcium ions from wastewater. The aeration pipe 6 is fixed to the inner wall and bottom wall of the calcium removal box 1 so that it does not affect the stirring of the first stirring plate 11 and the second stirring plate 13, improving practicality.

[0034] Example 2

[0035] Please see Figures 1 to 7 The present invention provides a technical solution: a calcium removal reaction device for high-calcium wastewater. Support plates 14 are installed on both the inner front and inner rear walls of the filter box 2. A rectangular plate 15 abuts against the top of the support plate 14. A limiting groove with a depth in the vertical direction is opened on the top of the rectangular plate 15. The end of a limiting rod 29 is inserted into the limiting groove. The cross-section of the support plate 14 is L-shaped. A first rectangular frame 16 is installed on one side of the rectangular plate 15. The position of the first rectangular frame 16 is higher than the position of a second rectangular frame 18. A handle 36 is installed on the top of the first rectangular frame 16. The highest position of the handle 36 is lower than the inner top wall of the filter box 2. A mating plate 17 is installed at the bottom of the first rectangular frame 16. The mating plate 17 is installed on one side of the horizontal plate 21. The end of the mating plate 17 is located inside the cavity. The position of the contact rod 22 corresponds to the position of the contact switch 20. A second rectangular frame is installed on the top of the filter basket 3. 18. The interior of the second rectangular frame 18 has a cavity. The inner top wall of the cavity is equipped with a support spring 19 and a contact switch 20. The end of the support spring 19 is equipped with a horizontal plate 21. The top of the horizontal plate 21 is equipped with a contact rod 22. The inner bottom wall of the cavity is equipped with a storage battery 23. The top of the rectangular plate 15 is equipped with an alarm 24. Adjustment boxes 25 are installed at the front and rear of the filter box 2. The inner wall of the adjustment box 25 has a convex groove with a depth in the front-back direction and a length in the up-down direction. The end of the convex slider 27 is located inside the convex groove. The convex slider 27 can slide along the length of the convex groove. The limit spring 28 is installed inside the convex groove. A pull rod 26 is inserted into the interior of the adjustment box 25. The convex slider 27 is installed on one side of the pull rod 26. The top of the convex slider 27 is equipped with a limit spring 28. The other side of the pull rod 26 is equipped with a limit rod 29.

[0036] In use, the inner bottom wall of the calcium separator 1 is higher on the left and lower on the right to facilitate the flow of wastewater to the conveying pipe 38. Opening valve 39 allows wastewater to enter the filter box 2 through the conveying pipe 38. The position of the conveying pipe 38 corresponds to the position of the filter basket 3. The wastewater flows through the filter basket 3 to the inner bottom wall of the filter box 2. The calcium carbonate crystals in the wastewater are blocked by the filter basket 3. As the amount of calcium carbonate crystals entering the filter basket 3 increases, the second rectangular frame 18 causes the filter basket 3 to descend, and the support spring 19 contracts under pressure. The position of the contact rod 22 corresponds to the position of the contact switch 20. The battery 23 provides power to the contact switch 20 and the alarm 24. When the contact rod 22 contacts the contact switch 20, the alarm 24 sounds, reminding the staff to disassemble and remove the filter basket 3. Calcium carbonate crystals are trapped inside the filter basket 3. When disassembling the filter basket 3, pull the lever 26 upwards to move the convex slider 27 upwards along the length of the convex groove. This causes the limiting spring 28 to contract under force, and the end of the limiting rod 29 to leave the limiting groove. The rectangular plate 15 then abuts against the support plate 14. Afterwards, move the filter basket 3 using the handle 36. The length and width of the rectangular groove are both greater than the length and width of the filter basket 3, making it easy to remove the filter basket 3 from the inside of the filter box 2 and to remove the calcium carbonate crystals inside the filter basket 3. Then, return the filter basket 3 to its original position. The support plate 14 has an L-shaped cross-section. Release the lever 26, and the elastic tension of the limiting spring 28 will cause the end of the limiting rod 29 to insert into the limiting groove, thus restricting the position of the filter basket 3 and improving its practicality.

[0037] Example 3

[0038] Please see Figures 1 to 2 The present invention provides a technical solution: a calcium removal reaction device for high-calcium wastewater, wherein a fixed plate 30 is installed on the inner top wall of the filter box 2, an electric hydraulic push rod 31 is installed on one side of the fixed plate 30, an adjusting block 32 is installed on the movable end of the electric hydraulic push rod 31, a positioning slider 33 is installed in front of the adjusting block 32, a connecting rod 34 is rotatably connected to the inner wall of the filter box 2 through a shaft, a positioning groove with a depth in the front-back direction is opened inside the connecting rod 34, the end of the positioning slider 33 is located inside the positioning groove, the positioning slider 33 can slide along the length direction of the positioning groove, the position of the impact block 35 corresponds to the position of the filter basket 3, and the end of the connecting rod 34 is equipped with the impact block 35.

[0039] In use, the retraction and extension of the movable end of the electric hydraulic push rod 31 causes the adjusting block 32 to move the positioning slider 33. The connecting rod 34 is rotatably connected to the inner wall of the filter box 2 through the shaft, and the positioning slider 33 can slide along the length of the positioning groove. The movement of the positioning slider 33 causes the connecting rod 34 to swing within a certain range, causing the impact block 35 to impact the filter screen basket 3, which plays the role of vibrating the screen and preventing the filter screen basket 3 from clogging. The inner bottom wall of the filter box 2 is lower on the left and higher on the right, which facilitates the flow of wastewater to the drain pipe 40. Opening the drain cap 41 makes it easy to discharge wastewater through the drain pipe 40, improving practicality.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one" does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A calcium removal reaction device for high-calcium wastewater, comprising a calcium removal tank, a filter tank, and a filter basket, characterized in that: A servo motor and a pump-type aerator are installed on the top of the calcium removal box. An aeration pipe is installed at the output end of the pump-type aerator. A frame-shaped partition is installed on the inner top wall of the calcium removal box. A rotatable first and second round rod are installed inside the frame-shaped partition. A drive gear and a first stirring plate are installed on the outer surface of the first round rod, and a driven gear and a second stirring plate are installed on the outer surface of the second round rod. Support plates are installed on the inner front and inner rear walls of the filter box. A rectangular plate abuts against the top of the support plate. A first rectangular frame is installed on one side of the rectangular plate, and a mating plate is installed at the bottom of the first rectangular frame. A second rectangular frame is installed on the top of the filter basket. The second rectangular frame has a cavity inside, and the inner top wall of the cavity is divided into... The filter box is equipped with a support spring and a contact switch. A horizontal plate is installed at the end of the support spring, and a contact rod is installed at the top of the horizontal plate. A battery is installed on the inner bottom wall of the cavity. An alarm is installed on the top of the rectangular plate. Adjustment boxes are installed at the front and rear of the filter box. A pull rod is inserted into the inside of the adjustment box. A convex slider is installed on one side of the pull rod. A limit spring is installed on the top of the convex slider. A limit rod is installed on the other side of the pull rod. A fixed plate is installed on the inner top wall of the filter box. An electro-hydraulic push rod is installed on one side of the fixed plate. An adjustment block is installed at the movable end of the electro-hydraulic push rod. A positioning slider is installed in front of the adjustment block. A connecting rod is rotatably connected to the inner wall of the filter box through a shaft. An impact block is installed at the end of the connecting rod.

2. The calcium removal reactor for high-calcium wastewater according to claim 1, characterized in that: The driving gear meshes with the driven gear through teeth, and the first round rod and the driving gear are at the same center, as are the second round rod and the driven gear. The driving gear is positioned higher than the first stirring plate, and the driven gear is positioned higher than the second stirring plate. Both the driving gear and the driven gear are located inside the frame-shaped partition.

3. The calcium removal reactor for high-calcium wastewater according to claim 1, characterized in that: The mating plate is installed on one side of the horizontal plate, and the end of the mating plate is located inside the cavity. The position of the contact rod corresponds to the position of the contact switch.

4. The calcium removal reactor for high-calcium wastewater according to claim 1, characterized in that: The first rectangular frame is positioned higher than the second rectangular frame. A handle is installed on the top of the first rectangular frame, and the highest point of the handle is lower than the inner top wall of the filter box.

5. The calcium removal reaction device for high-calcium wastewater according to claim 1, characterized in that: The inner wall of the regulating box is provided with a convex sliding groove with depth in the front-back direction and length in the up-down direction. The end of the convex slider is located inside the convex sliding groove. The convex slider can slide along the length direction of the convex sliding groove. The limiting spring is installed inside the convex sliding groove.

6. The calcium removal reaction device for high-calcium wastewater according to claim 1, characterized in that: The top of the rectangular plate has a limiting groove with a depth in the vertical direction. The end of the limiting rod is inserted into the limiting groove. The cross-section of the support plate is L-shaped.

7. The calcium removal reaction device for high-calcium wastewater according to claim 1, characterized in that: The connecting rod has a positioning groove with a depth in the front-to-back direction. The end of the positioning slider is located inside the positioning groove. The positioning slider can slide along the length of the positioning groove. The position of the impact block corresponds to the position of the filter basket.

8. The calcium removal reactor for high-calcium wastewater according to claim 1, characterized in that: The first round rod is installed at the output end of the servo motor, and the first round rod and the shaft of the output end of the servo motor are at the same center. The servo motor and the pump-type aerator are electrically connected to the external power supply through wires, and the battery is electrically connected to the contact switch and the alarm through wires respectively.

9. The calcium removal reactor for high-calcium wastewater according to claim 1, characterized in that: A water inlet pipe is installed on one side of the calcium removal box, and a delivery pipe is installed on the other side. A valve is installed inside the delivery pipe, and the other end of the delivery pipe is connected to the top of the filter box. A drain pipe is installed on one side of the filter box, and a drain cap is installed at the end of the drain pipe. A rectangular channel is opened on the top of the filter box. The length and width of the filter basket are smaller than the length and width of the rectangular channel. The aeration pipe is fixedly connected to the inner wall and the inner bottom wall of the calcium removal box. The inner bottom walls of both the calcium removal box and the filter box are inclined. The inner bottom wall of the calcium removal box is higher on the left and lower on the right, while the inner bottom wall of the filter box is lower on the left and higher on the right. The calcium removal box is installed on top of the filter box.

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