A multi-medium filter pretreatment device for reclaimed water

Abstract

The utility model provides a kind of reclaimed water reuse multi-medium filtration pretreatment equipment.It relates to reclaimed water reuse treatment technical field.The reclaimed water reuse multi-medium filtration pretreatment equipment includes L-shaped rack and filter cartridge assembly, the filter cartridge assembly includes filter cartridge front section, filter cartridge middle section and filter cartridge tail section sequentially arranged from top to bottom, the bottom of filter cartridge front section is open design, the top and bottom of filter cartridge middle section are open design, the filter cartridge tail section is conical design;Cross connection pipe is fixedly installed on the top inner wall of filter cartridge front section, multiple water distribution ring pipes with different diameters are arranged below cross connection pipe, and multiple water distribution ring pipes are coaxial and sequentially distributed from inside to outside, water outlet holes are arranged in the bottom of multiple water distribution ring pipes.The utility model has the advantages of good filtering precision, stable operation, convenient subsequent maintenance and improved water inlet distribution uniformity.

Description

Technical Field

[0001] This utility model relates to the field of greywater reuse treatment technology, specifically a multi-media filtration pretreatment device for greywater reuse. Background Technology

[0002] With the increasingly severe water shortage problem, reclaimed water reuse has become an important means to alleviate the contradiction between water supply and demand. Before reuse, reclaimed water needs to go through multiple processes such as pretreatment and deep treatment. Among them, the filtration effect of the pretreatment stage directly affects the operating load and treatment cost of the subsequent treatment unit.

[0003] Currently, most existing greywater pretreatment filtration equipment uses single-media filtration (such as quartz sand filtration), which has the following shortcomings: First, the filtration accuracy is limited, making it difficult to effectively remove fine colloidal particles and suspended solids in the water, which leads to easy clogging of subsequent treatment units (such as reverse osmosis membranes and ultrafiltration membranes), increasing the frequency of membrane cleaning and replacement costs; Second, the overall structural design of the equipment is unreasonable, with uneven water inlet distribution and excessive local filter media load, shortening the filtration cycle and reducing the stability of equipment operation.

[0004] Therefore, it is necessary to provide a new multi-media filtration pretreatment device for recycled water to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this utility model is to provide a multi-media filtration pretreatment device for reclaimed water that has good filtration accuracy, stable operation, convenient subsequent maintenance, and can improve the uniformity of influent water distribution.

[0006] To solve the above-mentioned technical problems, the multi-media filtration pretreatment equipment for reclaimed water provided by this utility model includes: an L-shaped frame and a filter cartridge assembly. The filter cartridge assembly includes a front section, a middle section, and a rear section arranged sequentially from top to bottom. The bottom of the front section is open, the top and bottom of the middle section are open, and the rear section is tapered. A cross-shaped connecting pipe is fixedly installed on the inner wall of the top of the front section. Below the cross-shaped connecting pipe are multiple water distribution ring pipes of different diameters, and the multiple water distribution ring pipes are coaxial and arranged sequentially from the inside to the outside. The filter cartridge has multiple water distribution ring pipes, each with a water outlet at its bottom. Multiple connecting pipes are fixedly installed at the top of each water distribution ring pipe, and the top ends of each connecting pipe are fixedly connected to the cross-shaped connecting pipe. A main inlet pipe is fixedly installed at the top of the front section of the filter cartridge, and the bottom end of the main inlet pipe extends into the front section of the filter cartridge and is fixedly connected to the cross-shaped connecting pipe. A multi-media filtration layer and a support layer are provided in the middle section of the filter cartridge, with the support layer located below the multi-media filtration layer. A porous baffle is provided in the tail section of the filter cartridge, with the porous baffle located below the support layer.

[0007] Furthermore, a water inlet pump is fixedly installed at the top of the front section of the filter cartridge, and the outlet port of the water inlet pump is fixedly connected to the top of the main water inlet pipe.

[0008] Furthermore, a hydraulic cylinder is fixedly installed on the side of the L-shaped frame away from the front section of the filter cartridge, and a lifting arm is fixedly installed on the output shaft of the hydraulic cylinder, with one side of the lifting arm fixedly connected to the front section of the filter cartridge.

[0009] Furthermore, the multi-media filter layer includes an anthracite filter media layer, a quartz sand filter media layer, and an activated carbon filter media layer arranged sequentially from top to bottom.

[0010] Furthermore, the supporting layer includes a pebble layer and a crushed stone layer arranged sequentially from top to bottom.

[0011] Furthermore, an outer support is fixedly installed on the side of the L-shaped frame away from the middle section of the filter cartridge. A feed screw is provided between the outer support and the L-shaped frame. One end of the feed screw is rotatably connected to the outer support, and the other end is rotatably connected to the L-shaped frame. A transverse push plate is threaded onto the feed screw. A guide push rod is fixedly installed on one side of the transverse push plate. The guide push rod passes through the L-shaped frame and is fixedly connected to the middle section of the filter cartridge. The guide push rod is slidably connected to the L-shaped frame. A feed motor is fixedly installed on the side of the outer support away from the L-shaped frame. The output shaft of the feed motor is fixedly connected to one end of the feed screw. Two support plates are fixedly installed on one side of the L-shaped frame. The middle section of the filter cartridge is located between the two support plates. Each of the two support plates has a waist hole. A sliding shaft is slidably installed in each of the two waist holes. The ends of the two sliding shafts that are close to each other are fixedly connected to the middle section of the filter cartridge.

[0012] Furthermore, a first sealing ring is fixedly installed at the bottom of the front section of the filter cartridge, and the first sealing ring abuts against the top of the middle section of the filter cartridge. A fixing ring is fixedly fitted at the bottom of the middle section of the filter cartridge and the top of the tail section of the filter cartridge. A second sealing ring is fixedly installed on the side of the two fixing rings that are close to each other. The two second sealing rings abut against each other, and the two fixing rings are fixedly connected by multiple bolts. A drainage pipe is fixedly installed at the bottom of the tail section of the filter cartridge.

[0013] Compared with related technologies, the multi-media filtration pretreatment equipment for reclaimed water provided by this utility model has the following beneficial effects: I. This utility model uses a layered filtration system consisting of anthracite filter media, quartz sand filter media, and activated carbon filter media, as well as a stable support system consisting of a pebble layer and a crushed stone layer. This system can efficiently intercept suspended impurities and colloids in the water, adsorb some organic matter and odors, and finally achieve solid-liquid separation through a porous baffle, thereby providing qualified water for subsequent reuse processes and reducing membrane washing costs. Second, this utility model avoids disturbance of the filter media layer and reduces local blockage by uniformly distributing water through multiple water distribution rings, ensuring continuous and efficient filtration process and reducing the risk of operational failure. At the same time, it can avoid excessive local filter media load and improve the filtration cycle. Third, this utility model, through the setting of hydraulic cylinder and lifting arm, can quickly separate the front section and middle section of filter cartridge, and the bolt-connected fixing ring facilitates the separation of the middle section and tail section of filter cartridge. The feed motor, feed screw and other structures can be staggered to separate the middle section and front section of filter cartridge, which greatly simplifies the work of filter material replacement, component inspection and cleaning, and saves maintenance time and manpower. Attached Figure Description

[0014] Figure 1 One of the structural schematic diagrams of the multi-media filtration pretreatment equipment for wastewater reuse provided by this utility model; Figure 2 Schematic diagram 2 of the multi-media filtration pretreatment equipment for wastewater reuse provided by this utility model; Figure 3 This is a schematic diagram of the assembly of the L-shaped frame and the guide push rod in this utility model; Figure 4 This is a schematic cross-sectional view of the assembly structure of the middle section, tail section and front section of the filter cartridge in this utility model; Figure 5 This is a schematic diagram of the oblique upward view of the front section of the filter cartridge in this utility model; Figure 6 This is a schematic diagram of the assembly of the cross-shaped connecting pipe and the water distribution ring pipe in this utility model; Figure 7 This is a schematic diagram of the connection structure between the tail section of the filter cartridge and the porous baffle in this utility model.

[0015] Labels in the diagram: 1. L-shaped frame; 2. Middle section of filter cartridge; 3. Tail section of filter cartridge; 4. Front section of filter cartridge; 5. Inlet pump; 6. Cross connector; 7. Main inlet pipe; 8. Water distribution ring pipe; 9. Connecting pipe; 10. Hydraulic cylinder; 11. Lifting arm; 12. Anthracite filter media layer; 13. Quartz sand filter media layer; 14. Activated carbon filter media layer; 15. Pebble layer; 16. Crushed stone layer; 17. Porous baffle; 18. External support; 19. Feed screw; 20. Horizontal push plate; 21. Guide push rod. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Please refer to the following: Figures 1-7 .

[0018] The multi-media filtration pretreatment equipment for recycled water includes an L-shaped frame 1 and a filter cartridge assembly. The filter cartridge assembly comprises, from top to bottom, a front section 4, a middle section 2, and a rear section 3. The bottom of the front section 4 is open, the top and bottom of the middle section 2 are open, and the rear section 3 is tapered. A drain pipe is fixedly installed at the bottom of the rear section 3 to guide the filtered recycled water to subsequent equipment. A cross-shaped connecting pipe 6 is fixedly installed on the inner top wall of the front section 4. Below the cross-shaped connecting pipe 6 are multiple water distribution ring pipes 8 of different diameters, coaxially arranged from the inside out. Each water distribution ring pipe 8 has an outlet hole at its bottom to discharge the water to be filtered. The treated wastewater has multiple connecting pipes 9 fixedly installed at the top of multiple water distribution ring pipes 8. The top ends of the multiple connecting pipes 9 are fixedly connected to cross connecting pipes 6. The top of the front section 4 of the filter cartridge has a main inlet pipe 7 fixedly installed, the bottom of which extends into the front section 4 of the filter cartridge and is fixedly connected to the cross connecting pipe 6. In addition, the top of the front section 4 of the filter cartridge has an inlet pump 5 fixedly installed, the outlet of which is fixedly connected to the top of the main inlet pipe 7. The middle section 2 of the filter cartridge is provided with a multi-media filter layer and a support layer. The support layer is located below the multi-media filter layer and is used to support the multi-media filter layer and prevent the filter media from being lost. The tail section 3 of the filter cartridge is provided with a porous baffle 17. The porous baffle 17 is located below the support layer and is used to support the support layer to achieve solid-liquid separation.

[0019] In this embodiment, the multi-media filter layer includes an anthracite filter layer 12, a quartz sand filter layer 13, and an activated carbon filter layer 14 arranged sequentially from top to bottom, and the support layer includes a pebble layer 15 and a crushed stone layer 16 arranged sequentially from top to bottom.

[0020] In this embodiment, to separate the middle section 2 and the front section 4 of the filter cartridge for easy cleaning or replacement of parts, a hydraulic cylinder 10 is fixedly installed on the side of the L-shaped frame 1 away from the front section 4 of the filter cartridge. A lifting arm 11 is fixedly installed on its output shaft. One side of the lifting arm 11 is fixedly connected to the front section 4 of the filter cartridge. Two limiting slide pins are fixedly installed on the top of the L-shaped frame 1. Both limiting slide pins pass through the lifting arm 11 and are slidably connected to it. An outer bracket 18 is fixedly installed on the side of the L-shaped frame 1 away from the middle section 2 of the filter cartridge. A feed screw 19 is rotatably installed between the outer bracket 18 and the L-shaped frame 1. A transverse pusher 20 is threaded onto the feed screw 19. A guide push rod 21 is fixedly installed on one side of the horizontal push plate 20. The guide push rod 21 passes through the L-shaped frame 1 and is fixedly connected to the middle section 2 of the filter cartridge. The guide push rod 21 is slidably connected to the L-shaped frame 1. A feed motor is fixedly installed on the side of the outer bracket 18 away from the L-shaped frame 1. Its output shaft is fixedly connected to one end of the feed screw 19. Two support plates are fixedly installed on one side of the L-shaped frame 1. The middle section 2 of the filter cartridge is located between the two support plates. Both support plates have waist holes. Sliding shafts are slidably installed in both waist holes. The ends of the two sliding shafts that are close to each other are fixedly connected to the middle section 2 of the filter cartridge. This can improve the stability of the middle section 2 of the filter cartridge when it moves laterally.

[0021] In this embodiment, in order to improve the sealing performance between the middle section 2 and the front section 4 of the filter cartridge, and between the middle section 2 and the tail section 3 of the filter cartridge, a first sealing ring is fixedly installed at the bottom of the front section 4 of the filter cartridge. The first sealing ring abuts against the top of the middle section 2 of the filter cartridge. A fixing ring is fixedly fitted at the bottom of the middle section 2 of the filter cartridge and the top of the tail section 3 of the filter cartridge. A second sealing ring is fixedly installed on the side of the two fixing rings that are close to each other. The two second sealing rings abut against each other, and the two fixing rings are fixedly connected by multiple bolts. The installation of the two fixing rings by bolts also facilitates the disassembly of the middle section 2 and the tail section 3 of the filter cartridge.

[0022] The working principle of the multi-media filtration pretreatment equipment for reclaimed water provided by this utility model is as follows: In this equipment, the inlet pump 5 is connected to an external water source through an external pipe, and the diversion pipe is connected to the subsequent deep treatment equipment; When treating greywater, the inlet pump 5 is started first. The inlet pump 5 pressurizes and delivers the greywater to be treated to the inlet main pipe 7 through the outlet port. Then, the greywater is introduced into the cross-connecting pipe 6 through the inlet main pipe 7, thus completing the power delivery of greywater into the equipment. When the cross-shaped connecting pipe 6 receives the greywater delivered by the main water inlet pipe 7, it distributes the greywater to multiple water distribution ring pipes 8 of different diameters that are coaxially arranged and distributed from the inside to the outside through multiple connecting pipes 9 fixedly connected below it. Multiple water distribution ring pipes 8 utilize a "ring diffusion + multi-layer distribution" structural design to evenly spray the greywater into the middle section 2 of the filter cartridge through the water outlet, avoiding local water flow impact that could disturb the filter media layer. Afterwards, the reclaimed water first passes through the anthracite filter media layer 12. Utilizing the characteristics of "large pores and large interception capacity" of the anthracite filter media, it intercepts suspended impurities with larger particle sizes in the reclaimed water. Then, it permeates into the quartz sand filter media layer 13. The quartz sand filter media, through its characteristics of "moderate particle size and high filtration accuracy," further intercepts smaller colloids and suspended particles. Finally, it flows through the activated carbon filter media layer 14. The activated carbon removes some organic matter, odors, and pigments from the reclaimed water through adsorption, thus completing deep purification. After deep purification, the wastewater enters the support layer. After being filtered by the support layer, it enters the tail section 3 of the filter cartridge. Solid-liquid separation is finally achieved through the porous baffle 17 fixedly installed below the support layer. Finally, the purified water is discharged through the drainage pipe fixedly installed at the bottom of the tail section 3 of the filter cartridge and enters the subsequent wastewater reuse process for further treatment.

[0023] When the filter media needs to be replaced or cleaned, first start the hydraulic cylinder 10, whose output shaft drives the lifting arm 11 to lift upward. The front section 4 of the filter cylinder rises synchronously with the lifting arm 11, disengaging from the top of the middle section 2 of the filter cylinder, so that the first sealing ring no longer contacts the top of the middle section 2 of the filter cylinder. Then start the feed motor, whose output shaft drives the feed screw 19 to rotate. When the feed screw 19 rotates, the horizontal push plate 20 installed on its thread drives the guide push rod 21 to move laterally. At the same time, the middle section 2 of the filter cylinder slides along the waist hole of the support plate with the guide push rod 21, and finally achieves the staggered separation of the front section 4 of the filter cylinder and the middle section 2 of the filter cylinder, which facilitates the cleaning of the water distribution ring pipe 8 or the maintenance of the cross connecting pipe 6. In addition, multiple bolts on the fixing rings at the bottom of the middle section 2 and the top of the tail section 3 of the filter cartridge can be unscrewed to directly separate the middle section 2 and the tail section 3 of the filter cartridge, making it convenient to replace or clean the multi-media filter layer and the support layer.

[0024] Compared with related technologies, the multi-media filtration pretreatment equipment for reclaimed water provided by this utility model has the following beneficial effects: I. This utility model uses a layered filtration system consisting of anthracite filter layer 12, quartz sand filter layer 13, and activated carbon filter layer 14, and is supported and stabilized by a pebble layer 15 and a crushed stone layer 16. It can efficiently intercept suspended impurities and colloids in the water, adsorb some organic matter and odors, and finally achieve solid-liquid separation through a porous partition 17, thereby providing qualified water quality for subsequent reuse processes and reducing membrane washing costs. Second, this utility model avoids disturbance of the filter media layer and reduces local blockage by uniformly distributing water through multiple water distribution ring pipes 8, ensuring continuous and efficient filtration process and reducing the risk of operational failure. At the same time, it can avoid excessive local filter media load and improve the filtration cycle. Third, this utility model, through the setting of hydraulic cylinder 10 and lifting arm 11, can quickly separate the front section 4 and the middle section 2 of the filter cartridge, and the bolt-connected fixing ring facilitates the separation of the middle section 2 and the tail section 3 of the filter cartridge. The feed motor, feed screw 19 and other structures can be staggered to separate the positions of the middle section 2 and the front section 4 of the filter cartridge, which greatly simplifies the filter material replacement, component inspection and cleaning work, and saves maintenance time and manpower.

[0025] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A multi-media filtration pretreatment device for recycled water, comprising an L-shaped frame and filter cartridge assemblies, characterized in that, The filter cartridge assembly includes a front section, a middle section, and a rear section arranged sequentially from top to bottom. The bottom of the front section is open, the top and bottom of the middle section are open, and the rear section is tapered. A cross-shaped connecting pipe is fixedly installed on the top inner wall of the front section of the filter cartridge. Below the cross-shaped connecting pipe, there are multiple water distribution ring pipes of different diameters. The multiple water distribution ring pipes are coaxial and distributed from the inside to the outside. Each of the multiple water distribution ring pipes has a water outlet hole at its bottom. Each of the multiple water distribution ring pipes has multiple connecting pipes fixedly installed at its top. The top of each of the multiple connecting pipes is fixedly connected to the cross-shaped connecting pipe. A main water inlet pipe is fixedly installed at the top of the front section of the filter cartridge. The bottom end of the main water inlet pipe extends into the front section of the filter cartridge and is fixedly connected to the cross-shaped connecting pipe. The middle section of the filter cartridge is provided with a multi-media filtration layer and a support layer, with the support layer located below the multi-media filtration layer. The tail section of the filter cartridge is provided with a porous baffle, which is located below the support layer.

2. The multi-media filtration pretreatment equipment for reclaimed water as described in claim 1, characterized in that, A water inlet pump is fixedly installed at the top of the front section of the filter cartridge, and the outlet port of the water inlet pump is fixedly connected to the top of the main water inlet pipe.

3. The multi-media filtration pretreatment equipment for reclaimed water as described in claim 1, characterized in that, A hydraulic cylinder is fixedly installed on the side of the L-shaped frame away from the front section of the filter cartridge. A lifting arm is fixedly installed on the output shaft of the hydraulic cylinder, and one side of the lifting arm is fixedly connected to the front section of the filter cartridge.

4. The multi-media filtration pretreatment equipment for reclaimed water as described in claim 1, characterized in that, The multi-media filter layer includes, from top to bottom, an anthracite filter layer, a quartz sand filter layer, and an activated carbon filter layer.

5. The multi-media filtration pretreatment equipment for reclaimed water as described in claim 1, characterized in that, The supporting layer includes a pebble layer and a crushed stone layer arranged sequentially from top to bottom.

6. The multi-media filtration pretreatment equipment for reclaimed water as described in claim 1, characterized in that, An outer support is fixedly installed on the side of the L-shaped frame away from the middle section of the filter cartridge. A feed screw is provided between the outer support and the L-shaped frame. One end of the feed screw is rotatably connected to the outer support, and the other end is rotatably connected to the L-shaped frame. A transverse push plate is threaded onto the feed screw. A guide push rod is fixedly installed on one side of the transverse push plate. The guide push rod passes through the L-shaped frame and is fixedly connected to the middle section of the filter cartridge. The guide push rod is slidably connected to the L-shaped frame. A feed motor is fixedly installed on the side of the outer support away from the L-shaped frame. The output shaft of the feed motor is fixedly connected to one end of the feed screw. Two support plates are fixedly installed on one side of the L-shaped frame. The middle section of the filter cartridge is located between the two support plates. Each of the two support plates has a waist hole. A sliding shaft is slidably installed in each of the two waist holes. The ends of the two sliding shafts that are close to each other are fixedly connected to the middle section of the filter cartridge.

7. The multi-media filtration pretreatment equipment for reclaimed water as described in claim 1, characterized in that, A first sealing ring is fixedly installed at the bottom of the front section of the filter cartridge, and the first sealing ring abuts against the top of the middle section of the filter cartridge. A fixing ring is fixedly fitted at the bottom of the middle section of the filter cartridge and the top of the tail section of the filter cartridge. A second sealing ring is fixedly installed on the side of the two fixing rings that are close to each other. The two second sealing rings abut against each other, and the two fixing rings are fixedly connected by multiple bolts. A drainage pipe is fixedly installed at the bottom of the tail section of the filter cartridge.

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