Fabricated manganese removal device and manganese removal method adopting same

Abstract

The invention discloses an assembly type manganese removal device and a manganese removal method adopting the same, and belongs to the technical field of water treatment. The problem that an existing manganese removal device cannot be suitable for a water plant filter tank with seasonal manganese exceeding the standard is solved. Comprising a frame body, a lifting lug and a plurality of manganese removal main bodies, the lifting lug is fixedly installed at the top end of the frame body, the manganese removal main bodies are installed on the frame body, modified filter materials are contained in the manganese removal main bodies, the lifting lug is grabbed through lifting equipment to achieve lifting of the frame body, and then high-position and low-position adjustment of the manganese removal main bodies in the filter tank is achieved. According to the assembly type manganese removal device, upgrading and reconstruction of manganese removal can be carried out on a built filter tank, the function of manganese removal of the filter tank is achieved on the basis that original facilities are not changed, so that sudden manganese pollution of inflow water can be better coped with under the condition that water supply of the original facilities is not cut off, and the assembly type manganese removal device is low in reconstruction cost, capable of being repeatedly used and detachable.

Description

Technical Field

[0001] The invention relates to an assembled manganese removal device and a manganese removal method using the manganese removal device, belonging to the technical field of water treatment. Background Art

[0002] Excessive concentration of manganese ions in tap water can have a great impact on human health and production and life, so the removal of manganese in tap water has always been a focus of attention in the field of water treatment. Traditional methods for removing manganese ions include natural oxidation, chemical oxidation, biological treatment, physical adsorption and contact oxidation. Among them, contact oxidation is a common treatment process with simple operation and low operating cost to remove manganese ions in influent water. In the long-term manganese removal process, manganese ions in influent water are first adsorbed on the surface of the filter material, and then oxidized to high-valent manganese oxides, thereby forming a manganese oxide coating on the surface of the filter material, namely "manganese active filter membrane". This substance has the function of catalytic manganese removal and can effectively catalyze the redox reaction of divalent manganese ions and dissolved oxygen under low pH conditions. The contact oxidation method usually uses filter materials such as natural manganese sand and natural zeolite. However, these filter materials require a certain start-up time for manganese removal, usually about 1 month, which greatly weakens the emergency treatment capacity of seasonal manganese excess in raw water. At the same time, due to structural limitations, the existing manganese removal device cannot be quickly removed after it is applied to the filter tank. Therefore, it is generally used in water plants with long-term manganese excess. Since the manganese ions in most surface water sources usually show seasonal changes, it is particularly important to develop a low-cost, fast-starting, and seasonally adaptable rapid manganese removal device to deal with sudden manganese pollution. Summary of the invention

[0003] The invention aims to solve the problem that the existing manganese removal device cannot be applied to the filter tank of a water plant with seasonal manganese excess, and further provides an assembled manganese removal device and a manganese removal method using the manganese removal device.

[0004] The technical solution adopted by the present invention to solve the above technical problems is:

[0005] An assembled manganese removal device comprises a frame body, a lifting lug and a plurality of manganese removal bodies, wherein the lifting lug is fixedly mounted on the top of the frame body, the plurality of manganese removal bodies are mounted on the frame body and the manganese removal bodies are filled with modified filter material, the frame body is lifted by grabbing the lifting lug through a lifting device, and then the high and low position adjustment of the manganese removal bodies in the filter tank is realized.

[0006] When the manganese removal body is a mesh box, the frame body includes a first main frame and a peripheral net arranged around and at the bottom of the first main frame, a plurality of mesh units are arranged in the first main frame, and a plurality of mesh boxes are placed in the plurality of mesh units in a one-to-one correspondence and are all detachably connected to the first main frame;

[0007] When the manganese removal body is a filter bag, a supporting net is installed in the filter tank, and the frame body includes a second main frame and a plurality of fixing rings fixedly mounted on the lower end of the second main frame. A plurality of filter bags are fixedly hoisted under the second main frame through a plurality of fixing rings in a one-to-one correspondence, and the supporting net is fixedly arranged 3 cm to 10 cm above the filter material layer in the filter tank.

[0008] Furthermore, the supporting net includes a stainless steel bracket and a stainless steel net laid and fixed on the stainless steel bracket.

[0009] Furthermore, the number of the lifting ears is at least two and they are evenly distributed on the frame body.

[0010] Furthermore, a hanging beam with an inverted U-shaped structure is fixedly provided between the hanging ear and the frame body.

[0011] A method for removing manganese using the assembled manganese removal device, wherein the manganese removal body is a mesh box, comprises the following steps:

[0012] Step 1: Assembly:

[0013] Install and fix the net box into the grid unit, and evenly add the modified filter material into the net box;

[0014] Step 2: Suspension:

[0015] A hoisting device is added above the filter tank, and the assembled manganese removal device is placed in the filter tank, connected to the hoisting device through the lifting lug, and the assembled manganese removal device is hoisted to a low position by the hoisting device to complete the suspension of the assembled manganese removal device;

[0016] Step 3: Run:

[0017] Start the filter tank. The water entering the filter tank first passes through the assembled manganese removal device, and then passes through the original quartz sand in the filter tank before entering the outlet weir to achieve manganese and turbidity removal.

[0018] Step 4: Backwash:

[0019] Use hoisting equipment to lift the assembled manganese removal device to a high position, and then wash the quartz sand filter material in the filter tank and the modified filter material in the assembled manganese removal device;

[0020] Step 5: Return to position:

[0021] After backwashing, the assembled manganese removal device is lowered to its original position using lifting equipment.

[0022] A method for disassembling the assembled manganese removal device in the above-mentioned manganese removal method comprises the following steps:

[0023] Step 1: Move the assembled manganese removal device out of the filter tank by hoisting equipment;

[0024] Step 2, taking the net box out of the grid unit, and taking the modified filter material out of the net box;

[0025] Step three: clean the net box and frame and perform rust-proof treatment.

[0026] A method for removing manganese using the assembled manganese removal device, wherein the manganese removal body is a filter bag, comprises the following steps:

[0027] Step 1: Assembly:

[0028] Evenly add modified filter material into the filter bag, and then fix and hang the filter bag under the second main frame;

[0029] Step 2: Suspension:

[0030] A hoisting device is added above the filter tank, and the assembled assembled manganese removal device is suspended above the filter tank by the hoisting device to complete the device suspension;

[0031] Step 3: Run:

[0032] Adjust the height of the filter bag through the lifting equipment to ensure that the filter bags are closely arranged on the supporting net, start the filter pool, and the water in the filter pool flows through the filter bag and then enters the outlet weir after passing through the original quartz sand in the filter pool to achieve manganese and turbidity removal;

[0033] Step 4: Backwash:

[0034] Use the lifting equipment to lift the filter bag to a high position, ensure that the filter bag remains in a free hanging state under the action of gravity, and there are gaps between the filter bags, and then start the first flushing of the quartz sand filter material in the filter tank and the modified filter material in the filter bag. After the first flushing is completed, use the lifting equipment to lower the filter bag to the middle position so that the filter bag falls on the supporting net, and start the automatic program of the lifting equipment to adjust the filter bag height repeatedly between the high position and the middle position, and at the same time start the second flushing of the quartz sand filter material in the filter tank and the modified filter material in the filter bag;

[0035] Step 5: Return to position:

[0036] After the second backwash, use lifting equipment to lower the filter bags to a low position.

[0037] A method for disassembling the assembled manganese removal device in the above-mentioned manganese removal method comprises the following steps:

[0038] Step 1: Raise the frame and the filter bag mounted on it to the highest position by hoisting equipment;

[0039] Step 2: open the fixing ring, remove the filter bag, and take out the modified filter material in the filter bag;

[0040] Step 3: Clean and store the filter bags.

[0041] Compared with the prior art, the present invention has the following effects:

[0042] The assembled manganese removal device of the present invention can be applied to the filter tank in the water plant, especially to the V-type filter tank. In the case of seasonal manganese exceeding the standard, the assembled manganese removal device is installed in the filter tank, which can enable the existing water plant filter tank to achieve the effect of emergency rapid manganese removal. When the manganese concentration level of the influent is low, only the quartz sand of the filter tank is used for filtration, and the assembled manganese removal device can be selectively removed from the filter tank.

[0043] The assembled manganese removal device of the present invention can upgrade and transform the built filter tank for manganese removal, and realize the function of removing manganese from the filter tank without changing the original facilities, so as to better cope with the sudden manganese pollution of the incoming water while ensuring that the original facilities are not shut off. The transformation cost is low, the device can be reused, and the device is detachable.

[0044] By using the manganese removal method of the present invention, the modified filter material in the assembled manganese removal device can be cleaned while ensuring the cleaning effect of the filter material in the built filter tank, so that both the permanent filter material and the temporary filter material can be effectively cleaned. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a schematic diagram of the application state of the assembled manganese removal device applied to the filter tank when the manganese removal main body is a mesh box;

[0046] Figure 2 It is a schematic diagram of the application state of the assembled manganese removal device applied to the filter tank when the manganese removal main body is a filter bag (the high position and low position states of the filter bag are shown in the same figure at the same time);

[0047] Figure 3 It is a front view schematic diagram of an assembled manganese removal device when the manganese removal main body is a mesh box;

[0048] Figure 4 for Figure 3 Schematic diagram of the left side (not to scale);

[0049] Figure 5 for Figure 3 Schematic top view (not to scale);

[0050] Figure 6 It is a front view schematic diagram of an assembled manganese removal device when the manganese removal main body is a filter bag;

[0051] Figure 7 for Figure 6 Schematic top view (not to scale);

[0052] Figure 8 is the SEM image of the alkalized filter material;

[0053] Fig. 9is the SEM image of the modified filter material;

[0054] Fig.10 This is the EDS image of the alkalized filter material;

[0055] Fig.11 This is the EDS diagram of the modified filter material.

[0056] In the figure:

[0057] 1. Frame body; 11. First main frame body; 11-1. Grid unit; 12. Outer net; 13. Second main frame body; 14. Fixed ring; 2. Lifting ear; 31. Filter box; 32. Filter bag; 33. Supporting net; 4. Lifting equipment; 5. Lifting beam; 100. Filter tank. DETAILED DESCRIPTION

[0058] Specific implementation method 1: Combination Figure 1-7 This embodiment is explained, and the technical scheme in the embodiment of the present invention is clearly and completely described. Obviously, the described embodiment is only a part of the embodiment of the present invention, rather than all the embodiments. Based on the embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0059] It should be noted that the descriptions of the present invention regarding directions such as "front", "back", "left", "right", "inside", "outside", "left side", "right side", "upper", "lower", "top", "bottom", etc. are all defined based on the relationship between the orientations or positions shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the structure must be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. In the description of the present invention, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0060] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] An assembled manganese removal device includes a frame body 1, a lifting ear 2 and a plurality of manganese removal bodies, wherein the lifting ear 2 is fixedly mounted on the top of the frame body 1, the plurality of manganese removal bodies are mounted on the frame body 1 and the manganese removal bodies are filled with modified filter material, the frame body 1 is lifted by grabbing the lifting ear 2 through a lifting device 4, and the high and low position adjustments of the manganese removal bodies in the filter tank 100 are thereby achieved.

[0062] The assembled manganese removal device of the present invention can be applied to the filter tank 100 in the water plant, and is particularly applicable to the V-type filter tank. In the case of seasonal manganese excess, the assembled manganese removal device is installed in the filter tank 100, so that the existing water plant filter tank can achieve the effect of emergency rapid manganese removal. When the manganese concentration level of the influent is low, only the quartz sand of the filter tank 100 is used for filtration, and the assembled manganese removal device can be selectively removed from the filter tank 100.

[0063] The assembled manganese removal device of the present invention can upgrade and transform the already built filter tank 100 for manganese removal, and realize the manganese removal function of the filter tank 100 without changing the original facilities, so as to better cope with the sudden manganese pollution of the incoming water while ensuring that the original facilities are not shut down. The transformation cost is low, the device can be reused, and the device is detachable.

[0064] The hoisting equipment 4 may be, for example, a crane.

[0065] The modified filter material is a modified filter material with a stable and rapid manganese removal function. The preparation method of the modified filter material is:

[0066] Step 1, rinse the filter material with tap water for 3 to 5 times, then dry it with hot air at 60°C until it is completely dry, and cool it naturally to room temperature;

[0067] Step 2, take the filter material in the above step 1, add it to a sodium hydroxide solution with a mass fraction of 1-2%, mix it evenly, shake it at room temperature, then wash it with tap water until it is neutral, and then use hot air to dry it at 60°C until it is completely dry, and naturally cool it to room temperature to obtain an alkalized filter material;

[0068] Step 3, mixing the alkalized filter material obtained in step 2 with a 4-8% (preferably 6%) manganese chloride solution, adding tap water, mixing evenly, contact shaking at room temperature, and then drying with hot air at 60° C. until completely dry, and naturally cooling to room temperature to obtain a divalent manganese modified filter material;

[0069] Step 4, mixing the divalent manganese modified filter material obtained in step 3 with 2-6% (preferably 4%) potassium permanganate solution, adding tap water, mixing evenly, contact shaking at room temperature, and then drying with hot air at 60° C. until completely dry, and naturally cooling to room temperature to obtain an active manganese oxide modified filter material;

[0070] Step 5, mixing the active manganese oxide modified filter material of step 4 with 2-6% (preferably 4%) potassium permanganate solution again, adding tap water, mixing evenly and contact shaking at room temperature, then using hot air blast drying at 60° C. to dry completely, and naturally cooling to room temperature to obtain a modified filter material with stable and rapid manganese removal function.

[0071] The filter material in step 1 can be any one of common water purification filter materials such as manganese sand, zeolite, quartz sand, river sand or ceramsite. The particle size of the filter material ranges from 1.5 to 2.5 mm, and the non-uniformity coefficient is 1.4 to 1.6.

[0072] The room temperature contact shaking time in step 2-5 is 12 to 24 hours.

[0073] The mass ratio of the filter material to the sodium hydroxide solution in step 2 is 1:(1-1.5),

[0074] In step 3, the mass ratio of filter material to solution is 1:(2-3),

[0075] In step 4, the mass ratio of the filter material to the solution is 1:(2-3),

[0076] In step 5, the mass ratio of filter material to solution is 1:(2-3).

[0077] Compared with the existing traditional manganese sand filter material, the modified filter material prepared by the above method is inexpensive and starts up quickly, can achieve efficient adsorption and self-catalytic oxidation, can be quickly and safely modified in the water plant using its own filter material and reagents, and can achieve deep manganese removal filter tanks with water quality meeting the standard within three days when seasonal manganese exceeds the standard.

[0078] The manganese removal body can be a mesh box 31 or a filter bag 32, which can be selected according to the filter tank process and on-site conditions.

[0079] When the manganese removal body is a net box 31, the frame body 1 includes a first main frame 11 and a peripheral net 12 arranged around and at the bottom of the first main frame 11. A plurality of grid units 11-1 are arranged in the first main frame 11, and a plurality of net boxes 31 are placed in the plurality of grid units 11-1 in a one-to-one correspondence and are all detachably connected to the first main frame 11. With such a design, the assembled manganese removal device can be reused for more than ten years. The mesh size of the peripheral net 12 is 5cmX5cm. The net box 31 is a sealed design, which is composed of an 80-mesh stainless steel mesh and a rectangular stainless steel keel. The size of the keel is inlaid with the size of the grid unit 11-1. The sealing of the net box 31 can be achieved by setting an openable mesh top cover on the top of the net box 31. The detachable connection between the net box 31 in the grid unit 11-1 and the first main frame 11 is achieved by detachable buckles arranged at the top and bottom of the net box 31.

[0080] When the manganese removal main body is a filter bag 32, a supporting net 33 is installed in the filter tank 100, and the frame body 1 includes a second main frame body 13 and a plurality of fixing rings 14 fixedly mounted at the lower end of the second main frame body 13. A plurality of filter bags 32 are fixedly hoisted under the second main frame body 13 through a plurality of fixing rings 14 one by one, and the supporting net 33 is fixedly arranged 3 cm to 10 cm above the filter material layer in the filter tank 100.

[0081] The filter bag 32 can be reused for more than three years, its manufacturing cost is lower, and the backwashing effect is better. The supporting net 33 is fixed on the inner wall of the filter tank 100 to support the filter bag 32. The filter bag 32 is made of 80 mesh food-grade filter cloth, the size of the filter bag is Φ = 30cm ~ 60cm, the length of the filter bag is L = 50cm ~ 80cm, and the upper opening of the filter bag 32 is a sealable drawstring. The second main frame 13 is preferably a grid-shaped frame, and the filter bag 32 is hoisted at the intersection of the grid-shaped keel.

[0082] The supporting net 33 comprises a stainless steel bracket and a stainless steel net laid and fixed on the stainless steel bracket.

[0083] The number of the hanging ears 2 is at least two and they are evenly distributed on the frame body 1. Such a design ensures that the assembled manganese removal device is in a horizontal state and remains stable during the suspension process.

[0084] A hanging beam 5 of an inverted U-shaped structure is fixedly arranged between the lifting eye 2 and the frame body 1. By arranging the hanging beam 5, a certain height is separated between the lifting eye 2 and the frame body 1, so that the lifting eye 2 can be grasped by a crane.

[0085] When the manganese removal body is a mesh box 31, a manganese removal method using the assembled manganese removal device comprises the following steps:

[0086] Step 1: Assembly:

[0087] Install and fix the net box 31 into the grid unit 11-1, and evenly add the modified filter material into the net box 31;

[0088] Step 2: Suspension:

[0089] A hoisting device 4 is added above the filter tank 100, and the assembled manganese removal device is placed in the filter tank 100, connected to the hoisting device 4 through the lifting lug 2, and the assembled manganese removal device is hoisted to a low position by the hoisting device 4 to complete the suspension of the assembled manganese removal device;

[0090] Step 3: Run:

[0091] Start the filter tank 100, and the water entering the filter tank 100 first passes through the assembled manganese removal device, and then passes through the original quartz sand in the filter tank 100 and enters the outlet weir to achieve manganese and turbidity removal; the original quartz sand in the filter tank 100 can ensure that the turbidity of the outlet water meets the standard.

[0092] Step 4: Backwash:

[0093] The assembled manganese removal device is lifted to a high position by using the hoisting equipment 4, and then the quartz sand filter material in the filter tank 100 and the modified filter material in the assembled manganese removal device are flushed; by lifting the assembled manganese removal device to a high position, the modified filter material in the assembled manganese removal device can be flushed at the same time during the backwashing process of the quartz sand filter material in the filter tank 100. The flushing step adopts the existing conventional filter tank 100 flushing step, that is, air flushing → air-water backwashing → water flushing, specifically: start the blower, open the air inlet valve, and the air is sprayed out from the long-handled filter head, and the impurities on the surface of the quartz sand filter material and the modified filter material are scrubbed and separated and suspended in the water body. At the same time, the lateral water flow generated by the water inlet of the small holes in the water inlet tank forms a surface sweeping, and the impurities are flushed to the central drainage channel; then the flushing water pump is started, and the flushing water valve is opened. At this time, air and water enter the filter tank 100 at the same time for further cleaning; finally, the air inlet valve is closed, and water is used alone for backwashing again, and the lateral flushing effect is superimposed to completely flush the impurities suspended in the water into the drainage tank. The structures involved in this step, such as the long-handled filter head, water tank, central drain channel, flushing water pump, flushing water valve, air intake valve and drain tank, are all conventional structures of the existing water plant filter tank 100 and will not be described in detail here.

[0094] Step 5: Return to position:

[0095] After backwashing, the assembled manganese removal device is lowered to the original position using the hoisting equipment 4. The original position is the height position at which the assembled manganese removal device is suspended in step 2.

[0096] By using the manganese removal method of the present invention, the modified filter material in the assembled manganese removal device can be cleaned while ensuring the cleaning effect of the filter material in the built filter tank 100, so that both the permanent filter material and the temporary filter material can be effectively cleaned.

[0097] When the manganese removal body is a mesh box 31, the high position is the position where the frame is 10-15 cm higher than the quartz sand filter material.

[0098] The low position is the position where the frame body is located above the quartz sand filter material and just contacts the quartz sand filter material.

[0099] When the manganese removal body is a mesh box 31, a method for disassembling the assembled manganese removal device comprises the following steps:

[0100] Step 1: Move the assembled manganese removal device out of the filter tank 100 by means of the lifting equipment 4;

[0101] Step 2: Take the net box 31 out of the grid unit 11-1, and take the modified filter material out of the net box 31;

[0102] Step 3: Clean the net box 31 and the frame body 1 and perform rust prevention treatment. After the disassembly is completed, the modified filter material, the net box 31 and the frame body 1 are stored in a dry and dark place.

[0103] When the manganese removal body is a filter bag 32, a manganese removal method using the assembled manganese removal device comprises the following steps:

[0104] Step 1: Assembly:

[0105] Add the modified filter material evenly into the filter bag 32, and then fix and hang the filter bag 32 under the second main frame 13;

[0106] Step 2: Suspension:

[0107] A hoisting device 4 is added above the filter tank 100, and the assembled assembled manganese removal device is suspended above the filter tank 100 by using the hoisting device 4 to complete the device suspension;

[0108] Step 3: Run:

[0109] The height of the filter bag 32 is adjusted by the hoisting equipment 4 to ensure that the filter bag 32 is tightly arranged on the supporting net 33, and the filter tank 100 is started. After the water in the filter tank 100 flows through the filter bag 32, it enters the outlet weir after passing through the original quartz sand in the filter tank 100 to achieve manganese and turbidity removal. During the height adjustment process, the filter bag is first adjusted to a low position by the hoisting equipment 4, and then the height of the filter bag 32 is adjusted multiple times using the hoisting equipment 4 designed with an automated program to ensure that the filter bag 32 is tightly arranged on the supporting net 33.

[0110] Step 4: Backwash:

[0111] Use the lifting equipment 4 to lift the filter bag 32 to a high position, ensure that the filter bag 32 remains in a freely hanging state under the action of gravity, and there are gaps between the filter bags 32, and then start the first flushing of the quartz sand filter material in the filter tank 100 and the modified filter material in the filter bag 32. After the first flushing is completed, use the lifting equipment 4 to lower the filter bag 32 to a middle position so that the filter bag 32 falls on the supporting net 33, and start the automated program of the lifting equipment 4 to adjust the height of the filter bag 32 to repeatedly change between a high position and a middle position, and at the same time start the second flushing of the quartz sand filter material in the filter tank 100 and the modified filter material in the filter bag 32; while backwashing, the backwashing is assisted by shaking of the upper and lower positions. The high position of the filter bag 32 is the position above the filter tank 100 and away from the water level of the filter tank 100 (preferably at a horizontal plane position 30-60 cm above the support net), the middle position is the filter bag 32 falling on the support net 33 but not completely stacked and tightly arranged on the support net 33 (preferably at a horizontal plane position 20-40 cm above the support net), and the low position is the filter bag 32 tightly arranged on the support net 33. The high position, low position and middle position are all based on the bottom end of the filter bag. The first flushing process is specifically air flushing → air-water backwashing → water flushing, specifically: start the blower, open the air inlet valve, and the air is sprayed out from the long-handled filter head. The impurities on the surface of the quartz sand filter material are scrubbed away and suspended in the water body. At the same time, the lateral water flow generated by the water entering the small holes in the water inlet trough forms a surface sweeping and flushing, and the impurities are flushed to the central drainage channel; then start the flushing water pump and open the flushing water valve. At this time, air and water enter the filter tank 100 at the same time for further cleaning; finally, close the air inlet valve, use water alone to backwash again, and superimpose the lateral flushing effect to completely flush the impurities suspended in the water into the drainage trough, so that the quartz sand filter material is fully cleaned. The structures involved in this step, such as the long-handled filter head, the water trough, the central drainage channel, the flushing water pump, the flushing water valve, the air inlet valve and the drainage trough, are all conventional structures of the existing water plant filter tank 100, and will not be repeated here.

[0112] The second flushing process is specifically air-water backwashing → water flushing, which is specifically: start the blower, open the air inlet valve, start the flushing water pump, and open the flushing water valve. At this time, air and water enter the filter tank 100 at the same time. Under the friction between the quartz sand and the filter bag 32, the mutual friction between the modified filter materials, and the combined shearing action of air and water, the impurities on the surface of the modified filter material in the filter bag 32 are scrubbed and separated into the water outside the filter bag 32. Finally, the air inlet valve is closed, and backwashing is performed with water alone. Combined with the lateral flushing effect, the impurities suspended in the water are completely flushed into the drain tank.

[0113] Step 5: Return to position:

[0114] After the second backwash, the filter bag 32 is lowered to a low position using the hoisting device 4. That is, the filter bag 32 is closely arranged on the supporting net 33. Through the manganese removal method of the present invention, the modified filter material in the assembled manganese removal device can be cleaned at the same time while ensuring the cleaning effect of the filter material in the built filter tank 100, so that both the permanent filter material and the temporary filter material can be effectively cleaned.

[0115] When the manganese removal body is a filter bag 32, a method for disassembling the assembled manganese removal device comprises the following steps:

[0116] Step 1: Raise the frame body 1 and the filter bag 32 hoisted thereon to the highest position by means of the hoisting device 4; at this time, the frame body 1 is not disassembled, and the highest position is the highest position that the hoisting device 4 can hoist;

[0117] Step 2: open the fixing ring 14, remove the filter bag 32, and take out the modified filter material in the filter bag 32;

[0118] Step 3: Clean and store the filter bag 32. After the filter bag 32 is cleaned, the filter bag 32 and the modified filter material are stored in a dry and dark place.

[0119] Specific implementation method 2: Combination Figure 8-11 To illustrate this embodiment, the preparation method of the modified filter material is:

[0120] Step 1, taking zeolite with a particle size range of 1.5 to 2.5 mm and a non-uniformity coefficient of 1.4 to 1.6, washing it with tap water for 3 to 5 times, and then drying it with hot air at 60° C. until it is completely dry, and cooling it naturally to room temperature;

[0121] Step 2, take the above filter material, add it to a sodium hydroxide solution with a mass fraction of 1 to 2%, the mass ratio of zeolite to sodium hydroxide solution is 1:1.5, mix well and then contact and shake at room temperature, then wash with tap water until neutral, then use hot air to dry at 60°C until completely dry, and naturally cool to room temperature to obtain an alkalized filter material.

[0122] Step 3, mixing the alkalized filter material obtained in step 2 with a 4-8% manganese chloride solution, with the mass ratio of zeolite to the manganese chloride solution being 1:3, adding tap water, mixing evenly, contact-shaking at room temperature, and then drying with hot air at 60° C. until completely dry, and naturally cooling to room temperature to obtain a divalent manganese modified filter material.

[0123] Step 4, mixing the divalent manganese modified filter material obtained in step 3 with 2-6% potassium permanganate solution, the mass ratio of zeolite to potassium permanganate solution is 1:3, adding tap water, mixing evenly and contact shaking at room temperature, and then using hot air blast drying at 60° C. to dry until completely dry, and naturally cooling to room temperature to obtain an active manganese oxide modified filter material.

[0124] Step 5, mixing the active manganese oxide modified filter material of step 4 with 2-6% potassium permanganate solution again, with the mass ratio of zeolite to potassium permanganate solution being 1:2, adding tap water, mixing evenly and contact-shaking at room temperature, then using hot air blast drying at 60° C. to dry completely, and naturally cooling to room temperature to obtain a modified filter material with stable and rapid manganese removal function.

[0125] The obtained alkalized filter material and the modified filter material with stable and rapid manganese removal function were characterized by microstructure. Figure 8 and Fig. 9 As shown in the figure, the surface of the modified zeolite is relatively flat but not smooth, and has a certain adsorption capacity, but no catalytic oxidation capacity. On the surface of the manganese removal filter material, granular substances, namely adsorbed manganese oxides, can be observed. The EDS and SEM spectra of the alkalized filter material and the modified filter material with stable and rapid manganese removal function are shown in Fig.10 and Fig.11 As shown in the figure, it can be seen that a manganese catalytic layer is formed on the surface of the modified filter material after being treated in the above steps.

[0126] Other components and connection relationships are the same as those in the first specific implementation mode.

[0127] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An assembled manganese removal device, characterized in that: The invention comprises a frame body (1), a lifting ear (2) and a plurality of manganese removal bodies, wherein the lifting ear (2) is fixedly mounted on the top of the frame body (1), the plurality of manganese removal bodies are mounted on the frame body (1) and the manganese removal bodies are filled with modified filter material, the frame body (1) is lifted by grabbing the lifting ear (2) with a lifting device (4), and the manganese removal bodies are adjusted between high and low positions in the filter tank (100), wherein the manganese removal bodies are mesh boxes (31) or filter bags (32). When the manganese removal body is a mesh box (31), the frame body (1) comprises a first main frame (11) and a peripheral net (12) arranged around and at the bottom of the first main frame (11); a plurality of mesh units (11-1) are arranged in a partitioned manner in the first main frame (11); a plurality of mesh boxes (31) are placed in the plurality of mesh units (11-1) in a one-to-one correspondence and are all detachably connected to the first main frame (11); When the manganese removal body is a filter bag (32), a supporting net (33) is installed in the filter tank (100), the frame body (1) comprises a second main frame body (13) and a plurality of fixing rings (14) fixedly mounted on the lower end of the second main frame body (13), a plurality of filter bags (32) are fixedly mounted and suspended one by one below the second main frame body (13) through the plurality of fixing rings (14), and the supporting net (33) is fixedly mounted 3 cm to 10 cm above the filter material layer in the filter tank (100).

2. The assembled manganese removal device according to claim 1, characterized in that: The supporting net (33) comprises a stainless steel bracket and a stainless steel net laid and fixed on the stainless steel bracket.

3. The assembled manganese removal device according to claim 1, characterized in that: The number of the lifting ears (2) is at least two and they are evenly distributed on the frame body (1).

4. The assembled manganese removal device according to claim 1, characterized in that: A hanging beam (5) with an inverted U-shaped structure is fixedly arranged between the hanging ear (2) and the frame body (1).

5. A method for removing manganese using the assembled manganese removal device according to any one of claims 1 to 4, wherein the manganese removal body is a mesh box (31), comprising the following steps: Step 1: Assembly: Installing and fixing the net box (31) into the grid unit (11-1), and uniformly adding the modified filter material into the net box (31); Step 2: Suspension: A hoisting device (4) is added above the filter tank (100), the assembled assembled manganese removal device is placed in the filter tank (100), connected to the hoisting device (4) via the lifting lug (2), and the assembled manganese removal device is hoisted to a low position using the hoisting device (4), thereby completing the suspension of the assembled manganese removal device; Step 3: Run: The filter tank (100) is started, and the water entering the filter tank (100) first passes through the assembled manganese removal device, and then passes through the original quartz sand in the filter tank (100) and enters the water outlet weir to achieve manganese removal and turbidity removal; Step 4: Backwash: The assembled manganese removal device is lifted to a high position using a lifting device (4), and then the quartz sand filter material in the filter tank (100) and the modified filter material in the assembled manganese removal device are washed; Step 5: Return to position: After backwashing, the assembled manganese removal device is lowered to its original position using a lifting device (4).

6. A method for disassembling the assembled manganese removal device in the manganese removal method according to claim 5, comprising the following steps: Step 1: removing the assembled manganese removal device from the filter tank (100) by means of a lifting device (4); Step 2, taking the mesh box (31) out of the grid unit (11-1), and taking the modified filter material out of the mesh box (31); Step three, cleaning the net box (31) and the frame body (1), and performing rust prevention treatment.

7. A method for removing manganese using the assembled manganese removal device according to any one of claims 1 to 4, wherein the manganese removal body is a filter bag (32), comprising the following steps: Step 1: Assembly: Evenly adding the modified filter material into the filter bag (32), and then fixing and hanging the filter bag (32) below the second main frame (13); Step 2: Suspension: A hoisting device (4) is added above the filter tank (100), and the assembled assembled manganese removal device is suspended above the filter tank (100) using the hoisting device (4), thereby completing the device suspension; Step 3: Run: The height of the filter bag (32) is adjusted by means of a hoisting device (4) to ensure that the filter bag (32) is closely arranged on the supporting net (33), and the filter pool (100) is started. After the water in the filter pool (100) flows through the filter bag (32), it flows through the original quartz sand in the filter pool (100) and enters the outlet weir, thereby achieving manganese removal and turbidity removal; Step 4: Backwash: The filter bag (32) is lifted to a high position by using the lifting device (4), ensuring that the filter bag (32) remains in a freely hanging state under the action of gravity, and there are gaps between the filter bags (32), and then the first flushing of the quartz sand filter material in the filter tank (100) and the modified filter material in the filter bag (32) is started. After the first flushing is completed, the filter bag (32) is lowered to a middle position by using the lifting device (4) so ​​that the filter bag (32) falls on the supporting net (33), and the automatic program of the lifting device (4) is started to adjust the height of the filter bag (32) repeatedly between the high position and the middle position, and at the same time, the second flushing of the quartz sand filter material in the filter tank (100) and the modified filter material in the filter bag (32) is started; Step 5: Return to position: After the second backwash, use lifting equipment to lower the filter bags to a low position.

8. A method for disassembling the assembled manganese removal device in the manganese removal method according to claim 7, comprising the following steps: Step 1: Raise the frame body (1) and the filter bag (32) hoisted thereon to the highest position by means of a hoisting device (4); Step 2, opening the fixing ring (14), removing the filter bag (32), and taking out the modified filter material in the filter bag (32); Step 3: Clean and store the filter bag (32).

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