Device for reducing chromaticity of strong brine by combining multi-stage medium filtration with ultrafiltration

Abstract

The invention belongs to the technical field of multi-stage treatment of sewage, and particularly relates to a multi-stage medium filtration and ultrafiltration combined strong brine chromaticity reducing device, which comprises a filtering tank and an ultrafiltration tank, the filtering tank is filled with a filtering medium, the filtering medium removes impurities in sewage through physical interception and adsorption effects so as to reduce chromaticity, and the ultrafiltration tank is filled with an ultrafiltration tank. The device further comprises an adjusting assembly, the adjusting assembly comprises a storage bin arranged in the filtering tank, and the storage bin is used for storing a filtering medium; the material pipe is mounted on the storage bin and is used for returning the filtering medium in the filtering tank to the storage bin or conveying the filtering medium in the storage bin to a filtering area of the filtering tank, so that the thickness of the filtering medium in the filtering tank is adjusted; by dynamically adjusting the thickness of the filtering medium, the using amount of the filtering medium can be adjusted in real time according to the water inlet chromaticity and the pollutant concentration to adapt to water quality fluctuation, and the adaptability of the device to complex production working conditions is improved.

Description

Technical Field

[0001] This invention belongs to the field of multi-stage wastewater treatment, specifically a concentrated brine color reduction device that combines multi-stage media filtration with ultrafiltration. Background Technology

[0002] In response to the complex composition, poor biodegradability, and dark brown color of concentrated brine from coking plants, the plant uses a concentrated brine color reduction device during water treatment. This device first removes suspended particles from the water through multi-stage media filtration, and then performs ultrafiltration for deep treatment. The dual action ensures that the water quality of the discharged water meets the standards, which not only significantly reduces the risk of environmental pollution, but also helps enterprises upgrade their environmental management.

[0003] A patent application with publication number CN120647079A discloses a multi-stage, multi-media wastewater treatment filtration device and method, including a processing tank. Several sets of filter tanks are arranged circumferentially inside the processing tank. The filter tank is composed of a fixed filter tank, a movable filter tank, and a tank cover. A control rod is installed in the middle of the filter tank. Several sets of filter frames for filtering wastewater are arranged at equal intervals on the control rod. Different types of filter media are filled in the filter frames. Impurities in wastewater are removed through the physical interception and adsorption of the filter media.

[0004] The above-mentioned scheme uses a fixed total amount of filter media, which is difficult to adapt to the strong fluctuations in the concentrated brine quality of coking plants. During production, such as adjustments to the coal blending ratio and changes in coking temperature, frequent fluctuations in the color of the influent and the concentration of pollutants will occur, leading to two core problems: When the color of the influent rises sharply and the concentration of pollutants is high, the fixed amount of filter media has insufficient adsorption and interception capacity, and cannot effectively retain color-producing substances, easily resulting in excessive color of the treated effluent, making it difficult to meet discharge or reuse requirements; When the color of the influent decreases and the pollutant load decreases, excessive filter media will increase the water flow resistance, resulting in a slower effluent rate, which not only reduces the overall treatment efficiency of the unit, but may also cause local water flow short circuits due to excessive accumulation of the filter media layer, thus affecting the stability of the treatment.

[0005] Therefore, the present invention provides a concentrated brine color reduction device that combines multi-stage media filtration with ultrafiltration. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by this invention to solve its technical problem is as follows: A multi-stage media filtration combined with ultrafiltration concentrated brine color reduction device, comprising a filter tank and an ultrafiltration tank, wherein the filter tank is filled with filter media, which removes impurities from wastewater through physical interception and adsorption, thereby reducing color. The device also includes an adjustment component, comprising: a storage chamber disposed within the filter tank for storing the filter media; and a feed pipe installed on the storage chamber for returning the filter media from the filter tank to the storage chamber, or transporting the filter media from the storage chamber to the filtration area of ​​the filter tank, thereby adjusting the thickness of the filter media within the filter tank.

[0008] Preferably, the filter tank is provided with a filter plate, a plurality of grid plates and a baffle plate, the filter medium is located between the filter plate and the baffle plate, and the plurality of grid plates are evenly distributed between the filter plate and the baffle plate, the grid plates being used to separate the filter layers.

[0009] Preferably, the adjusting assembly further includes: a circular plate installed in the storage chamber, the circular plate being provided with filter holes; a spiral conveyor shaft rotatably installed in the storage chamber, the spiral conveyor shaft passing through the circular plate; a first feed hole and a first discharge hole opened on the material pipe; a cylindrical disc rotatably installed on the material pipe, the cylindrical disc being provided with a second feed hole and a second discharge hole corresponding to the first feed hole and the first discharge hole; and a slip ring rotatably installed on the storage chamber, the slip ring communicating with the storage chamber, and a third water outlet pipe connected to the slip ring.

[0010] Preferably, the filter canisters comprise a plurality of canisters, each filled with a different filter medium, and the filter canisters are interconnected to form a step-by-step filtration path. The regulating components comprise a plurality of components, and the regulating components are configured corresponding to the filter canisters.

[0011] Preferably, a first inlet pipe is provided on the lower side wall of the filter tank, and a first outlet pipe is provided on the upper side wall. The first outlet pipe is connected to the first inlet pipe of the adjacent filter tank. The concentrated brine enters through the first inlet pipe, is filtered by the filter medium, and then flows into the next filter tank through the first outlet pipe. A second inlet pipe is provided above the filter tank, and a second outlet pipe is provided below it. An air inlet pipe is connected to the first inlet pipe. The third outlet pipe is connected to the second outlet pipe. The second inlet pipe, the second outlet pipe, and the air inlet pipe work together to achieve backwashing and cleaning of the filter medium in the filter tank. Two sets of filtration passages are provided. The device also includes a buffer tank, which is connected to both filtration passages. A detector is provided in the buffer tank to detect the contamination level of the concentrated brine in the buffer tank.

[0012] Preferably, the circular plate is slidably connected to the storage compartment, and a plurality of telescopic rods are fixedly installed on the storage compartment, with the ends of the telescopic rods fixedly connected to the circular plate.

[0013] Preferably, the adjusting assembly further includes a groove formed on the cylindrical disk, and the circular plate has a protrusion inserted into the groove.

[0014] Preferably, the adjusting assembly further includes: a connecting plate sleeved on the outside of the storage chamber, the connecting plate being rotatably connected to the storage chamber; a plurality of connecting rods slidably mounted on the filter tank, the connecting rods being fixedly connected to the connecting plate, the connecting rods passing through the filter tank, and the connection points being provided with rubber rings for sealing; and a threaded rod rotatably mounted on the filter tank, the threaded rod being threadedly connected to the connecting rods.

[0015] Preferably, the adjustment assembly further includes: a first column rotatably mounted on the filter tank, the first column having a first groove; a second column rotatably mounted on the filter tank, the second column having a second groove, the second groove being V-shaped, the storage compartment being slidably connected vertically to the second column; and a straight plate slidably mounted vertically inside the filter tank, a short rod rotatably mounted on the straight plate, the short rod sliding simultaneously within the first groove and the second groove.

[0016] Preferably, the adjusting assembly further includes: a main gear fixedly mounted on the first column; a first auxiliary gear fixedly mounted on the threaded rod; and a second auxiliary gear rotatably mounted on the filter tank, wherein the main gear drives the auxiliary gear to rotate through the second auxiliary gear.

[0017] The beneficial effects of this invention are as follows: 1. The multi-stage media filtration combined with ultrafiltration concentrated brine color reduction device of the present invention dynamically adjusts the thickness of the filter media. When the color of the influent rises sharply and the pollutant concentration is high, the filter media in the storage chamber is controlled to be transported to the filter tank through the feed pipe to increase the thickness of the filter media in the tank and enhance the adsorption and interception capacity. When the color of the influent decreases and the pollutant load decreases, the filter media in the filter tank is controlled to flow back to the storage chamber through the feed pipe for temporary storage to reduce the thickness of the filter media in the tank and optimize the water flow conditions.

[0018] 2. The multi-stage media filtration combined with ultrafiltration concentrated brine color reduction device of the present invention uses multiple filter tanks, each filled with different filter media. A detector monitors the contamination level of the concentrated brine in real time, and the thickness of the filter media in each filter tank in the filtration path is precisely adjusted. This adjustment ensures that the amount of filter media in each filter tank is perfectly matched to the current water quality requirements, further improving the balance between filtration efficiency and energy consumption. When adjusting the filter media thickness, the filter plate rotation and height are matched to ensure uniform media distribution and maintain constant stress, preventing pore deformation from affecting the filtration effect.

[0019] 3. The multi-stage media filtration combined with ultrafiltration concentrated brine color reduction device of the present invention uses a dual-channel alternating working mode. While one channel is filtering, the other channel is backwashed and cleaned simultaneously. The filter media is cleaned by the dual action of high-pressure air flushing and reverse water flow, avoiding the efficiency reduction caused by media blockage. Attached Figure Description

[0020] The invention will now be further described with reference to the accompanying drawings.

[0021] Figure 1 This is a perspective view of an embodiment of the present invention; Figure 2 This is a top view of the filter tank of the present invention; Figure 3 This is a schematic diagram showing the position of the threaded rod in this invention; Figure 4 This is a schematic diagram showing the positions of the grating and the baffle plate of the present invention; Figure 5 This is a cross-sectional view of the material pipe, storage bin, and screw conveyor shaft of the present invention; Figure 6 This is a schematic diagram of the structure of the cylindrical disc and the feed tube of the present invention; Figure 7 This is a schematic diagram of the structure of slide groove No. 1 and slide groove No. 2 of the present invention; In the diagram: 1. Filter tank; 2. Ultrafiltration tank; 3. Adjustment assembly; 31. Storage chamber; 32. Feed pipe; 33. Circular plate; 34. Screw conveyor shaft; 35. Feed port 1; 36. Discharge port 1; 37. Circular disc with column; 38. Feed port 2; 39. Discharge port 2; 310. Slip ring; 311. Water outlet pipe 3; 312. Telescopic rod; 313. Groove; 314. Connecting plate; 315. Connecting rod; 316. Threaded rod; 317, No. 1 column; 318, No. 2 column; 319, No. 1 slide groove; 320, No. 2 slide groove; 321, straight plate; 322, short rod; 323, main gear; 324, No. 1 auxiliary gear; 325, No. 2 auxiliary gear; 4, filter plate; 5, grating plate; 6, water baffle plate; 7, No. 1 water inlet pipe; 8, No. 1 water outlet pipe; 9, No. 2 water inlet pipe; 10, No. 2 water outlet pipe; 11, air inlet pipe; 12, buffer tank. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0023] like Figures 1-7 As shown in the figure, a multi-stage media filtration combined with ultrafiltration concentrated brine color reduction device according to an embodiment of the present invention includes a filter tank 1 and an ultrafiltration tank 2. The filter tank 1 is filled with filter media, which removes impurities in wastewater and reduces color through physical interception and adsorption. The device also includes an adjustment component 3, which includes a storage chamber 31 disposed in the filter tank 1 for storing filter media; and a feed pipe 32 installed on the storage chamber 31 for returning filter media from the filter tank 1 to the storage chamber 31 or transporting filter media from the storage chamber 31 to the filtration area of ​​the filter tank 1, thereby adjusting the thickness of the filter media in the filter tank 1.

[0024] Specifically, in existing technologies, the total amount of filter media is a fixed value, which is difficult to adapt to the strong fluctuations in the quality of concentrated brine in coking plants. During production, such as adjustments to the coal blending ratio and changes in coking temperature, frequent fluctuations in the color of the influent and the concentration of pollutants can occur, leading to two core problems: When the color of the influent rises sharply and the concentration of pollutants is high, the fixed amount of filter media has insufficient adsorption and interception capacity, and cannot effectively retain color-producing substances, easily resulting in excessive color of the treated effluent, making it difficult to meet discharge or reuse requirements; When the color of the influent decreases and the pollutant load decreases, excessive filter media will increase the water flow resistance, resulting in a slower effluent rate, which not only reduces the overall treatment efficiency of the unit, but may also cause local water flow short circuits due to excessive accumulation of the filter media layer, thus affecting the stability of the treatment. During operation, concentrated brine first enters filter tank 1, where the physical interception and adsorption functions of the filter media remove large particulate impurities from the water, completing the first stage of purification. Subsequently, the pre-purified concentrated brine enters ultrafiltration tank 2, where ultrafiltration technology traps tiny suspended solids and colloidal substances in the water, achieving the second stage of deep purification and ultimately reducing color. When the color of the influent increases sharply and the concentration of pollutants is high, the filter medium in the control storage chamber 31 is transported to the filter tank 1 through the feed pipe 32 to increase the thickness of the filter medium in the tank and enhance the adsorption and interception capacity. When the color of the influent decreases and the pollutant load decreases, the filter medium in the control filter tank 1 is returned to the storage chamber 31 through the feed pipe 32 for temporary storage to reduce the thickness of the filter medium in the tank and optimize the water flow conditions. By dynamically adjusting the thickness of the filter media, the amount of filter media can be adjusted in real time according to the color of the influent and the concentration of pollutants, adapting to water quality fluctuations and improving the adaptability of the device to complex production conditions.

[0025] like Figures 1-6 As shown, the filter tank 1 is provided with a filter plate 4, several grid plates 5 and baffle plates 6. The filter medium is located between the filter plate 4 and the baffle plates 6. Several grid plates are evenly distributed between the filter plate 4 and the baffle plates 6. The grid plates 5 are used to separate the filter layers.

[0026] The adjusting assembly 3 also includes: a circular plate 33 installed in the storage chamber 31, the circular plate 33 having filter holes; a spiral conveyor shaft 34 rotatably installed in the storage chamber 31, the spiral conveyor shaft 34 passing through the circular plate 33; a first feed hole 35 and a first discharge hole 36 opened on the material pipe 32; a columnar disc 37 rotatably installed on the material pipe 32, the columnar disc 37 having a second feed hole 38 and a second discharge hole 39 consistent with the first feed hole 35 and the first discharge hole 36; and a slip ring 310 rotatably installed on the storage chamber 31, the slip ring 310 communicating with the storage chamber 31, and a third water outlet pipe 311 connected to the slip ring 310.

[0027] Specifically, the filter holes are used to remove the solution from the filter medium in the storage chamber 31. The solution flows out through the slip ring 310 and the third outlet pipe 311. When it is necessary to reduce the filter medium, first control the rotating of the columnar disc 37 so that the first feed hole 35 and the second feed hole 38 are aligned. Then control the rotating of the screw conveyor shaft 34 (driven by electricity) to guide the filter medium on the filter plate 4 into the storage chamber 31 to reduce the thickness of the filter medium. When it is necessary to increase the filter medium, first control the rotating of the columnar disc 37 so that the second discharge hole 39 and the first discharge hole 36 are aligned. Then control the rotating of the screw conveyor shaft 34 in the opposite direction to guide the filter medium in the storage chamber 31 onto the filter plate 4 to increase the thickness of the filter medium.

[0028] like Figures 1-6 The filter tank 1 contains several filters, each filled with a different filter medium. The filters are interconnected to form a step-by-step filtration path. The regulating component 3 contains several components, which are set to correspond to the filters 1.

[0029] A first inlet pipe 7 is installed on the lower side wall of filter tank 1, and a first outlet pipe 8 is installed on the upper side wall. The first outlet pipe 8 is connected to the first inlet pipe 7 of the adjacent filter tank 1. Concentrated brine enters from the first inlet pipe 7, is filtered by the filter medium, and then flows into the next filter tank 1 from the first outlet pipe 8. A second inlet pipe 9 is installed above the filter tank 1, and a second outlet pipe 10 is installed below it. An air inlet pipe 11 is connected to the first inlet pipe 7. A third outlet pipe 311 is connected to the second outlet pipe 10. The second inlet pipe 9, the second outlet pipe 10, and the air inlet pipe 11 work together to achieve backwashing and cleaning of the filter medium in the filter tank 1. There are two sets of filter passages. The device also includes a buffer tank 12, which is connected to the two filter passages respectively. A detector is installed in the buffer tank 12 to detect the contamination level of the concentrated brine in the buffer tank 12.

[0030] Specifically, because coking brine is rich in calcium, magnesium, barium, strontium and other ions, it combines with sulfate, carbonate and silicate ions to easily form hard calcium sulfate, calcium carbonate and silica scale, which leads to severe and rapid caking of the filter media. To address the above issue, two filter loops are set up and run alternately: Filtration stage: The coking brine first enters the buffer tank 12 for temporary storage. The detector monitors the water pollution level in real time. Then, the buffer tank 12 introduces the brine into one of the filtration channels. The brine enters from the first inlet pipe 7 (bottom) of the first filter tank 1 in the channel and flows from bottom to top through the specific filter medium in the tank. After the corresponding impurities are intercepted and adsorbed, it is discharged from the first outlet pipe 8 above the filter tank 1. Then, it enters the subsequent filter tanks 1 for progressive deep filtration until the purification of the entire channel is completed. Backwashing stage: When one set of filter channels is in filtration mode, the other set of filter channels simultaneously starts backwashing: First, the No. 1 water inlet pipe 7 of each filter tank 1 in this channel is switched to connect with the air inlet pipe 11. High-pressure gas enters from the bottom of the filter tank 1, causing the filter media particles inside the tank to violently tumble and rub against each other under the action of airflow, thereby breaking up the micro-scale and loosening the sludge attached to the surface of the filter media; then, backwash water is introduced through the No. 2 water inlet pipe 9 above the filter tank 1. The water flow washes the filter media in reverse from top to bottom, completely peeling off the broken dirt and sludge from the surface of the filter media; finally, the wastewater containing dirt is discharged from the No. 2 water outlet pipe 10 below the filter tank 1, completing the cleaning and regeneration of the filter media; After the backwashing operation is completed, the system uses the concentrated brine contamination data detected in real time by the detector in the buffer tank 12 (which can be a turbidity meter, hardness analyzer, and UV254, etc.) to precisely adjust the thickness of the filter media in the filter tank 1 in the filtration path. This adjustment ensures that the amount of filter media used in each filter tank 1 is completely matched with the current water quality requirements, which solves the problem of filter media caking and achieves a balance between filtration efficiency and energy consumption.

[0031] like Figure 5 As shown, the circular plate 33 is slidably connected to the storage compartment 31. Several telescopic rods 312 are fixedly installed on the storage compartment 31, and the ends of the telescopic rods 312 are fixedly connected to the circular plate 33.

[0032] Specifically, during filter media discharge, the telescopic rod 312 is extended (electrically driven), causing the circular plate 33 to gradually slide upwards. The upper end of the filter media contacts the portion of the screw conveyor shaft 34 containing the spiral blades. The rotation generates a stable conveying force, ensuring that the filter media is uniformly and quantitatively conveyed to the feed pipe 32 along the spiral blade trajectory and then enters the filter tank 1. During filter media introduction, the telescopic rod 312 is gradually retracted, causing the circular plate 33 to slide downwards. The filter media does not contact the portion of the screw conveyor shaft 34 containing the spiral blades. At this time, when the screw conveyor shaft 34 rotates in the reverse direction, the filter media in the tank can be smoothly introduced into the storage chamber 31 through the feed pipe 32. Since the spiral blades do not contact the original filter media in the storage chamber 31, they will not cause disturbance or compression to the filter media in the storage chamber 31. This ensures that the introduced filter media can be evenly accumulated in the storage chamber 31, avoiding local accumulation and blockage of the filter media in the storage chamber 31, and ensuring the conveying stability during subsequent discharge.

[0033] like Figure 5 As shown, the adjustment component 3 also includes a groove 313 formed on the cylindrical disc 37, and the disc 33 has a protrusion for inserting into the groove 313.

[0034] Specifically, the middle part of the groove 313 is arc-shaped, and the two ends of the groove 313 are vertical. In the initial state, the protrusion of the circular plate 33 is located in the middle part of the arc shape. At this time, the first feed hole 35 and the second feed hole 38, the second discharge hole 39 and the first discharge hole 36 are not aligned. Therefore, the material pipe 32 and the storage chamber 31 are not connected to the inside of the filter tank 1. When it is necessary to discharge the filter medium, the telescopic rod 312 extends upward, driving the circular plate 33 to move upward. The circular plate 33 moves upward and pushes the columnar disc 37 to rotate through the arc-shaped part of the groove 313, so that the first discharge hole 36 and the second discharge hole 39 are aligned first. Then the circular plate 33 slides in the vertical part of the groove 313. At this time, the columnar disc 37 does not move. Conversely, the telescopic rod 312 is controlled to retract downward, so that the first feed hole 35 and the second feed hole 38 are aligned first.

[0035] like Figures 3-6As shown, the adjustment assembly 3 also includes: a connecting plate 314 sleeved on the outside of the storage chamber 31, the connecting plate 314 being rotatably connected to the storage chamber 31; a plurality of connecting rods 315 slidably mounted on the filter tank 1, the connecting rods 315 being fixedly connected to the connecting plate 314, the connecting rods 315 penetrating the filter tank 1, and a rubber ring for sealing being provided at the connection point; and a threaded rod 316 rotatably mounted on the filter tank 1, the threaded rod 316 being threadedly connected to the connecting rods 315.

[0036] Specifically, to accommodate vertical movement, the columnar disc 37, the third outlet pipe 311, and the feed pipe 32 adopt a telescopic structure. When adjusting the thickness of the filter medium, the threaded rod 316 is rotated simultaneously, causing the connecting rod 315 and the connecting plate 314 to slide up and down. The sliding of the connecting plate 314 drives the filter plate, the feed pipe 32, and the storage chamber 31 to move up and down synchronously. The filter plate moves up and down to adapt to different filter medium thicknesses, ensuring that the force on the filter medium between the filter plate and the grid plate 5 remains constant, avoiding changes in the force and the porosity between the filter medium, which would affect the filtration efficiency.

[0037] like Figures 4-7 As shown, the adjustment assembly 3 also includes: a first column 317 rotatably mounted on the filter tank 1, with a first groove 319 formed on the first column 317; a second column 318 rotatably mounted on the filter tank 1, with a second groove 320 formed on the second column 318, the second groove 320 being V-shaped, the storage compartment 31 being slidably connected to the second column 318 vertically; and a straight plate 321 slidably mounted vertically inside the filter tank 1, with a short rod 322 rotatably mounted on the straight plate 321, the short rod 322 sliding simultaneously within the first groove 319 and the second groove 320.

[0038] Specifically, while adjusting the thickness of the filter medium, the first column 317 is controlled to rotate. The first column 317 drives the column and the straight plate 321 to slide through the first slide groove 319. That is, the short rod 322 first slides upward a certain distance and then remains stationary, then slides downward a certain distance and remains stationary, and so on. The up and down sliding of the short rod 322 can drive the second column 318 to rotate back and forth through the second slide groove 320. The back and forth rotation of the second column 318 drives the storage bin 31 and the material pipe 32 to rotate synchronously. The material pipe 32 drives the filter plate to rotate back and forth, so as to achieve the purpose of uniformly distributing the filter medium on the filter plate.

[0039] like Figures 4-5 As shown, the adjustment assembly 3 also includes: a main gear 323 fixedly mounted on the first column 317; a first auxiliary gear 324 fixedly mounted on the threaded rod 316; and a second auxiliary gear 325 rotatably mounted on the filter tank 1, wherein the main gear 323 drives the auxiliary gear to rotate through the second auxiliary gear 325.

[0040] Specifically, the main gear 323 is a gear with incomplete teeth. When adjusting the thickness of the filter medium, the main gear 323 is controlled to rotate (driven by electricity). While the main gear 323 drives the first column 317 to rotate, the second auxiliary gear 325 intermittently drives the first auxiliary gear 324 to rotate. The rotation of the first auxiliary gear 324 causes the threaded rod 316 to rotate. The rotation of the threaded rod 316 causes the connecting rod 315 and the connecting plate 314 to move up and down, that is, to adjust the height of the filter plate.

[0041] Working principle: The coking brine first enters the buffer tank 12 for temporary storage. The detector monitors the water pollution level in real time. Then, the buffer tank 12 introduces the brine into one of the filtration channels. The brine enters from the first inlet pipe 7 (bottom) of the first filter tank 1 in this channel and flows from bottom to top through the specific filter medium in the tank. After completing the interception and adsorption of the corresponding impurities, it is discharged from the first outlet pipe 8 above the filter tank 1. Then, it enters the subsequent filter tanks 1 for staged filtration. Finally, the brine enters the ultrafiltration tank 2. Through ultrafiltration technology, it intercepts the tiny suspended solids and colloidal substances in the water to achieve deep purification and ultimately achieve the goal of reducing color. When one set of filtration channels is in filtration mode, another set of filtration channels simultaneously starts backwashing: First, the No. 1 water inlet pipe 7 of each filter tank 1 in this channel is switched to connect with the air inlet pipe 11. High-pressure gas enters from the bottom of the filter tank 1, causing the filter media particles inside the tank to violently tumble and rub against each other under the action of airflow, thereby breaking up the micro-scale and loosening the sludge attached to the surface of the filter media; then, backwash water is introduced through the No. 2 water inlet pipe 9 above the filter tank 1. The water flow washes the filter media in reverse from top to bottom, completely peeling off the broken dirt and sludge from the surface of the filter media; finally, the wastewater containing dirt is discharged from the No. 2 water outlet pipe 10 below the filter tank 1, completing the cleaning and regeneration of the filter media; After the backwashing operation is completed, the system uses the concentrated brine contamination data detected in real time by the detector in the buffer tank 12 (which can be used in conjunction with a turbidity meter, hardness analyzer and UV254) to precisely adjust the thickness of the filter media in the filter tank 1 in the filtration path. Through this adjustment, it is ensured that the amount of filter media used in each filter tank 1 is completely matched with the current water quality requirements. When it is necessary to reduce the amount of filter media, the control telescopic rod 312 gradually retracts, causing the circular plate 33 to slide downwards. The filter media does not contact the portion of the screw conveyor shaft 34 containing the helical blades. During this process, the circular plate 33 pushes the columnar disc 37 to rotate through the arc-shaped portion of the groove 313, aligning the first feed hole 35 and the second feed hole 38. Then, the circular plate 33 slides on the vertical portion of the groove 313, while the columnar disc 37 remains stationary. Subsequently, the control screw conveyor shaft 34 rotates (electrically driven), guiding the filter media on the filter plate 4 into the storage chamber 31 to reduce the thickness of the filter media. When it is necessary to add filter media, the telescopic rod 312 is gradually extended, causing the circular plate 33 to slide upwards. The upper end of the filter media contacts the part of the screw conveyor shaft 34 containing the screw blades. During this process, the circular plate 33 pushes the columnar disc 37 to rotate through the arc-shaped part of the groove 313, so that the first discharge hole 36 and the second discharge hole 39 are aligned first. Then the circular plate 33 slides in the vertical part of the groove 313. At this time, the columnar disc 37 does not move. Then the screw conveyor shaft 34 is controlled to rotate in the opposite direction, so as to guide the filter media in the storage chamber 31 onto the filter plate 4 to increase the thickness of the filter media. When adjusting the filter media thickness, the main gear 323 is controlled to rotate (driven by electricity). The main gear 323 drives the first column 317 to rotate. The first column 317 drives the column and the straight plate 321 to slide through the first slide groove 319. That is, the short rod 322 first slides upward a certain distance and then stays still, then slides downward a certain distance and stays still, and so on. The up and down sliding of the short rod 322 drives the second column 318 to rotate back and forth through the second slide groove 320. The reciprocating rotation of the second column 318 drives the storage bin 31 and the material pipe 32 to rotate synchronously. The feed pipe 32 drives the filter plate to rotate back and forth, so as to achieve the purpose of uniform distribution of the filter medium on the filter plate. At the same time, the second auxiliary gear 325 intermittently drives the first auxiliary gear 324 to rotate. The rotation of the first auxiliary gear 324 causes the threaded rod 316 to rotate. The rotation of the threaded rod 316 causes the connecting rod 315 and the connecting plate 314 to move up and down, that is, to adjust the height of the filter plate to adapt to different thicknesses of the filter medium. This ensures that the force on the filter medium between the filter plate and the grid plate 5 remains constant, avoiding the problem that changes in force and porosity between the filter medium will affect the filtration efficiency.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A concentrated brine color reduction device combining multi-stage media filtration and ultrafiltration, comprising a filter tank (1) and an ultrafiltration tank (2), wherein the filter tank (1) is filled with filter media, which removes impurities from the wastewater through physical interception and adsorption, thereby reducing color, characterized in that, Also includes: Adjustment component (3), the adjustment component (3) includes: A storage compartment (31) is provided inside the filter tank (1), the storage compartment (31) being used to store the filter medium; A feed pipe (32) is installed on the storage chamber (31). The feed pipe (32) is used to return the filter medium in the filter tank (1) to the storage chamber (31) or to transport the filter medium in the storage chamber (31) to the filter area of ​​the filter tank (1) to achieve the adjustment of the thickness of the filter medium in the filter tank (1).

2. The concentrated brine color reduction device combining multi-stage media filtration and ultrafiltration according to claim 1, characterized in that: The filter tank (1) is provided with a filter plate (4), a number of grid plates (5) and a baffle plate (6). The filter medium is located between the filter plate (4) and the baffle plate (6). The number of grid plates are evenly distributed between the filter plate (4) and the baffle plate (6). The grid plates (5) are used to separate the filter layers.

3. The concentrated brine color reduction device according to claim 1, characterized in that: The adjustment component (3) further includes: A circular plate (33) is installed inside the storage compartment (31), and the circular plate (33) is provided with filter holes; A spiral conveyor shaft (34) is rotatably installed inside the storage compartment (31), and the spiral conveyor shaft (34) passes through the circular plate (33). A first feed hole (35) and a first discharge hole (36) are provided on the material pipe (32); Rotate the cylindrical disc (37) mounted on the material pipe (32). The cylindrical disc (37) has a second feed hole (38) and a second discharge hole (39) that are consistent with the first feed hole (35) and the first discharge hole (36). Rotate the slip ring (310) installed on the storage chamber (31), the slip ring (310) is connected to the storage chamber (31), and the slip ring (310) is connected to the No. 3 water outlet pipe (311).

4. The concentrated brine color reduction device combining multi-stage media filtration and ultrafiltration according to claim 3, characterized in that: The filter canisters (1) are of several kinds, and each filter canister (1) is filled with a different filter medium. The filter canisters (1) are interconnected to form a step-by-step filtration path. The regulating components (3) are of several kinds, and the regulating components (3) are set in correspondence with the filter canisters (1).

5. The concentrated brine color reduction device combining multi-stage media filtration and ultrafiltration according to claim 4, characterized in that: A first inlet pipe (7) is provided on the lower side wall of the filter tank (1), and a first outlet pipe (8) is provided on the upper side wall. The first outlet pipe (8) is connected to the first inlet pipe (7) of the adjacent filter tank (1). Concentrated brine enters from the first inlet pipe (7), is filtered by the filter medium, and then flows into the next filter tank (1) from the first outlet pipe (8). A second inlet pipe (9) is provided above the filter tank (1), and a second outlet pipe (10) is provided below the filter tank (1). The first inlet pipe (7) is connected to the first outlet pipe (8). The device is connected to an air inlet pipe (11), and the third water outlet pipe (311) is connected to the second water outlet pipe (10). The second water inlet pipe (9), the second water outlet pipe (10) and the air inlet pipe (11) work together to backwash the filter medium in the filter tank (1). There are two sets of filter passages. The device also includes a buffer tank (12). The buffer tank (12) is connected to the two filter passages respectively. A detector is installed in the buffer tank (12). The detector is used to detect the contamination level of the concentrated brine in the buffer tank (12).

6. The concentrated brine color reduction device according to claim 3, characterized in that: The circular plate (33) is slidably connected to the storage compartment (31) in the upper and lower parts. Several telescopic rods (312) are fixedly installed on the storage compartment (31), and the ends of the telescopic rods (312) are fixedly connected to the circular plate (33).

7. The concentrated brine color reduction device according to claim 6, characterized in that: The adjustment assembly (3) also includes a groove (313) formed on the cylindrical disc (37), and the disc (33) has a protrusion inserted into the groove (313).

8. The concentrated brine color reduction device according to claim 5, characterized in that: The adjustment component (3) further includes: A connecting plate (314) is sleeved on the outside of the storage compartment (31), and the connecting plate (314) is rotatably connected to the storage compartment (31); A number of connecting rods (315) are slidably mounted on the filter tank (1). The connecting rods (315) are fixedly connected to the connecting plate (314). The connecting rods (315) pass through the filter tank (1), and a rubber ring for sealing is provided at the connection. Rotate the threaded rod (316) mounted on the filter tank (1), the threaded rod (316) being threadedly connected to the connecting rod (315).

9. The concentrated brine color reduction device according to claim 8, characterized in that: The adjustment component (3) further includes: Rotate the first column (317) installed on the filter tank (1), and the first column (317) has a first groove (319). Rotate the second column (318) installed on the filter tank (1). The second column (318) has a second sliding groove (320) which is V-shaped. The storage chamber (31) is slidably connected to the second column (318) in the upper and lower parts. A straight plate (321) is slidably installed inside the filter tank (1). A short rod (322) is rotatably installed on the straight plate (321). The short rod (322) slides simultaneously in the first slide groove (319) and the second slide groove (320).

10. The concentrated brine color reduction device according to claim 9, characterized in that: The adjustment component (3) further includes: The main gear (323) is fixedly installed on the first column (317); The first auxiliary gear (324) is fixedly installed on the threaded rod (316); Rotate the second auxiliary gear (325) mounted on the filter tank (1), and the main gear (323) drives the auxiliary gear to rotate through the second auxiliary gear (325).

Images