Energy-saving landfill leachate nanofiltration separation device

Abstract

The utility model relates to the technical field of landfill leachate treatment, and discloses an energy-saving landfill leachate nanofiltration separation device which comprises a mounting frame, a plurality of mold shells are fixedly connected in the mounting frame, a water outlet pipe is fixedly connected among the output ends of the mold shells on the right side, and a circulating pump is fixedly connected outside the water outlet pipe. The multiple mold shell output ends on the left side and the multiple mold shell input ends on the right side are fixedly connected through a water conveying pipe, and a high-pressure pump is fixedly connected to the exterior of the water conveying pipe. According to the utility model, sewage is conveyed into the left mold shell for treatment through the water inlet pump, then water is pressurized into the right mold shell for filtration through the cooperation of the water conveying pipe and the high-pressure pump, and finally the water is conveyed into the water tank for storage under the cooperation of the water outlet pipe and the circulating pump, so that the mixed loading technology of high and low pressure nanofiltration membrane elements is realized; the use performance of the membrane system can be effectively improved, so that the risk of composite sewage blockage of the system is reduced, and the service life of the membrane system is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of landfill leachate treatment, in particular to an energy-saving landfill leachate nanofiltration separation device. Background Art

[0002] In the landfill leachate treatment system, nanofiltration technology has been widely used. Nanofiltration is a membrane element between ultrafiltration and reverse osmosis. The filtration pore size is . It is mainly used to remove organic matter and divalent ions, providing a guarantee for the stable operation of the back-end reverse osmosis system.

[0003] The composition of landfill leachate is complex, and the concentrations of pollutants such as organic matter, ammonia nitrogen, and salt are high. The water quality has obvious seasonal and regional differences. In some areas, the salt and hardness are relatively high. Although the organic matter and ammonia nitrogen are greatly reduced after treatment by the biochemical system and ultrafiltration system, the organic matter and hardness content in the ultrafiltration effluent are still relatively high.

[0004] However, excessively high organic matter concentration and hardness can easily form complex pollution in the nanofiltration system, which has a great impact on the flux and service life of the membrane elements. Therefore, existing nanofiltration membrane elements have certain limitations in taking into account both membrane flux and hardness removal efficiency. Therefore, an energy-saving landfill leachate nanofiltration separation device is proposed to solve the above problems. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides an energy-saving landfill leachate nanofiltration separation device, which aims to improve the problem that excessively high organic matter concentration and hardness easily form complex pollution in the nanofiltration system, which greatly affects the flux and service life of the membrane elements.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an energy-saving landfill leachate nanofiltration separation device, including a mounting frame, a plurality of mold shells are fixedly connected to the inside of the mounting frame, a water outlet pipe is fixedly connected between the output ends of the plurality of mold shells on the right side, a circulation pump is fixedly connected to the outside of the water outlet pipe, the output ends of the plurality of mold shells on the left side and the input ends of the plurality of mold shells on the right side are fixedly connected through a water supply pipe, a high-pressure pump is fixedly connected to the outside of the water supply pipe, the input ends of the plurality of mold shells on the left side are fixedly connected to a water inlet pipe, the water inlet pipe is fixedly connected to the outside of the water inlet pump, and replacement components are installed inside the front and back sides of the mold shell, and the replacement components are used to facilitate the replacement of the filter element inside the mold shell.

[0007] As a further description of the above technical solution:

[0008] The replacement assembly includes a clamping ring and a baffle, the outer portion of the clamping ring is fixedly connected to the interior of the mold shell, the inner side of the baffle is in contact with the interior of the mold shell, a connecting tube is fixedly connected to the interior of the baffle, a nanofiltration membrane is slidably connected to the outer side of the connecting tube, a turntable is rotatably connected to the outer side of the connecting tube, four sliding grooves are provided inside the turntable, a card block is slidably connected to the inner side of the clamping ring, and the outer side of the card block is engaged with the inner side of the clamping ring.

[0009] As a further description of the above technical solution:

[0010] The right side of the high-pressure pump is fixedly connected to the left side of the mounting bracket.

[0011] As a further description of the above technical solution:

[0012] The right end of the water outlet pipe is fixedly connected to a water tank.

[0013] As a further description of the above technical solution:

[0014] A turning handle is inserted at the front end of the turntable, and the outer portion of the turning handle is sleeved inside the mold shell.

[0015] As a further description of the above technical solution:

[0016] The nanofiltration membrane is sleeved on the inside of the mold shell, and the rear side of the clamping block is slidably connected to the front side of the baffle.

[0017] As a further description of the above technical solution:

[0018] The outer portion of the connecting pipe is sleeved inside the mold shell, and the outer portion of the rotating disk is sleeved inside the mold shell.

[0019] As a further description of the above technical solution:

[0020] The multiple nanofiltration membranes on the left are high-pressure nanofiltration membrane components, and the multiple nanofiltration membranes on the right are low-pressure nanofiltration membrane components.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the utility model, the sewage is transported to the left mold shell for treatment through the water inlet pump, and then the water is pressurized into the right mold shell for filtration through the water pipe and the high-pressure pump. Finally, with the cooperation of the water outlet pipe and the circulation pump, the water is transported to the water tank for storage, realizing the use of high and low pressure nanofiltration membrane element mixed installation technology, which can effectively improve the performance of the membrane system, thereby reducing the risk of complex fouling and clogging of the system and prolonging the service life of the membrane system.

[0023] 2. In the utility model, by rotating the handle to drive the turntable to rotate, the slide groove allows the block to move, and engage and disengage with the clamping ring to unlock or fix the baffle, thereby realizing the rapid replacement of the membrane element of the nanofiltration system with a nanofiltration membrane element with a higher desalination rate and a higher operating pressure, so that the nanofiltration system forms a set of high-pressure nanofiltration membrane element system and a set of low-pressure nanofiltration membrane element system. The two nanofiltration systems are used in combination, thereby reducing the total hardness of the nanofiltration effluent and making the reverse osmosis system operate stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a three-dimensional schematic diagram of the energy-saving landfill leachate nanofiltration separation device proposed in the utility model;

[0025] Figure 2 This is a schematic structural diagram of the water pipe of the energy-saving landfill leachate nanofiltration separation device proposed in the utility model;

[0026] Figure 3 This is a schematic structural diagram of the mold shell of the energy-saving landfill leachate nanofiltration separation device proposed in the utility model;

[0027] Figure 4 This is a schematic structural diagram of the turntable of the energy-saving landfill leachate nanofiltration separation device proposed in the utility model.

[0028] Legend:

[0029] 1. Mounting frame; 2. Mould shell; 3. Water outlet pipe; 4. Circulation pump; 5. Water tank; 6. Water pipe; 7. High-pressure pump; 8. Water inlet pipe; 9. Water inlet pump; 10. Snap ring; 11. Baffle; 12. Connecting pipe; 13. Nanofiltration membrane; 14. Turntable; 15. Chute; 16. Block; 17. Turning handle. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] Reference Figure 1 - Figure 4The utility model provides an embodiment of an energy-saving landfill leachate nanofiltration separation device, including a mounting frame 1, a plurality of mold shells 2 are fixedly connected to the inside of the mounting frame 1, a water outlet pipe 3 is fixedly connected between the output ends of the plurality of mold shells 2 on the right side, a circulation pump 4 is fixedly connected to the outside of the water outlet pipe 3, the output ends of the plurality of mold shells 2 on the left side and the input ends of the plurality of mold shells 2 on the right side are fixedly connected through a water delivery pipe 6, a high-pressure pump 7 is fixedly connected to the outside of the water delivery pipe 6, the input ends of the plurality of mold shells 2 on the left side are fixedly connected to a water inlet pipe 8, and the water inlet pipe 8 is fixedly connected to the outside of the water inlet pump 9, replacement components are installed inside the front and back sides of the mold shell 2, the replacement components are used to facilitate replacement of the filter element inside the mold shell 2, the right side of the high-pressure pump 7 is fixedly connected to the left side of the mounting frame 1, and the right end of the water outlet pipe 3 is fixedly connected to the water tank 5.

[0032] Specifically, the mounting frame 1 is used to connect and support the mold shell 2 to keep the mold shell 2 stable. The mold shell 2 is used to separate and filter sewage. The multiple mold shells 2 on the left are installed with low-pressure nanofiltration membrane elements, and the multiple mold shells 2 on the right are high-pressure nanofiltration membrane elements. The outlet pipe 3 is used to transport clean filtered water. The circulation pump 4 is used to pump the filtered water into the water tank 5. The water tank 5 is used to store the filtered water. The water pipe 6 is used to transport the water filtered by the low-pressure nanofiltration membrane element to the high-pressure nanofiltration membrane element for secondary filtration. The high-pressure pump 7 is used to pressurize the water. The water inlet pipe 8 is used to transport the sewage into the mold shell 2, and the water inlet pump 9 is used to extract the sewage.

[0033] Reference Figure 1 - Figure 4 The replacement component includes a clamping ring 10 and a baffle 11. The outside of the clamping ring 10 is fixedly connected to the inside of the mold shell 2, and the inner side of the baffle 11 is abutted against the inside of the mold shell 2. The inside of the baffle 11 is fixedly connected to a connecting tube 12, and the outside of the connecting tube 12 is slidably connected to a nanofiltration membrane 13. The outside of the connecting tube 12 is rotatably connected to a turntable 14. Four slide grooves 15 are opened inside the turntable 14, and a block 16 is slidably connected inside the slide groove 15. The outside of the block 16 is engaged with the inner side of the clamping ring 10. A turning handle 17 is inserted at the front end of the turntable 14, and the outside of the turning handle 17 is sleeved inside the mold shell 2. The nanofiltration membrane 13 is sleeved inside the mold shell 2. The rear side of the block 16 is slidably connected to the front side of the baffle 11. The connecting tube 12 is sleeved outside the mold shell 2, and the outside of the turntable 14 is sleeved inside the mold shell 2. The multiple nanofiltration membranes 13 on the left are high-pressure nanofiltration membrane assemblies, and the multiple nanofiltration membranes 13 on the right are low-pressure nanofiltration membrane assemblies.

[0034] Specifically, the retaining ring 10 is used to install the baffle 11 in the mold shell 2. The baffle 11 is used to keep the mold shell 2 sealed. The connecting pipe 12 is used to install the nanofiltration membrane 13 in the mold shell 2. The nanofiltration membrane 13 is a nanofiltration membrane element. The one on the left is low pressure and the one on the right is high pressure. The turntable 14 is used to control the disassembly and installation of the baffle 11. The slide groove 15 is used to control the moving direction of the block 16 and ensure that the block 16 can only move in the specified direction under the limit groove in the baffle 11 without moving around. The handle 17 is used to facilitate manual rotation of the turntable 14 to drive the installation and disassembly of the baffle 11.

[0035] Working principle: When using this device, first drive the water inlet pump 9 to work, and draw the sewage into the left mold shell 2 through the water inlet pipe 8, and filter it once through the low-pressure nanofiltration membrane 13. Then the filtered water is pressurized by the high-pressure pump 7, and then enters the right mold shell 2 through the water pipe 6, and is filtered twice through the high-pressure nanofiltration membrane 13. Finally, the filtered clean water is drawn into the water tank 5 through the outlet pipe 3 by the circulation pump 4 for storage. During the treatment process, the mixed treatment device has the characteristics of high membrane flux and high cutoff hardness, while reducing the risk of composite fouling of the nanofiltration membrane 13, extending the service life of the nanofiltration membrane 13. In order to ensure the stable operation and normal use of the membrane system, and according to the relevant configuration of the membrane assembly, one of the nanofiltration membranes 13 needs to be replaced with a nanofiltration membrane 13 with a high desalination rate. In order to reduce the total hardness of the nanofiltration effluent and ensure the long-term stable operation of the reverse osmosis system, first remove the port connecting the water supply pipe 6 and the right mold shell 2, then insert the handle 17 into the turntable 14 and rotate it, driving the turntable 14 to make the slide 15 move the block 16 to the middle. At this time, the block 16 is disconnected from the clamping ring 10, and the baffle 11 is easily removed. At this time, take out the nanofiltration membrane 13 and replace it with a nanofiltration membrane 13 with a high desalination rate. Then align the connecting pipe 12 with the nanofiltration membrane 13 and then push it into the mold shell 2. At this time, turn the handle 17 in the opposite direction to make the turntable 14 rotate synchronously, so that the block 16 is re-engaged with the clamping ring 10 to achieve replacement and fixation. Finally, reconnect the pipeline for normal use. The two sets of nanofiltration systems are used in combination to reduce the total hardness of the nanofiltration effluent and make the reverse osmosis system operate stably.

[0036] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An energy-saving landfill leachate nanofiltration separation device, comprising a mounting frame (1), characterized in that: The mounting frame (1) is internally fixedly connected to a plurality of mold shells (2); a water outlet pipe (3) is fixedly connected between the output ends of the plurality of mold shells (2) on the right side; a circulation pump (4) is fixedly connected to the outside of the water outlet pipe (3); the output ends of the plurality of mold shells (2) on the left side and the input ends of the plurality of mold shells (2) on the right side are fixedly connected via a water delivery pipe (6); a high-pressure pump (7) is fixedly connected to the outside of the water delivery pipe (6); the input ends of the plurality of mold shells (2) on the left side are fixedly connected to a water inlet pipe (8); the water inlet pipe (8) is fixedly connected to the outside of a water inlet pump (9); replacement components are installed inside both the front and rear sides of the mold shell (2); the replacement components are used to facilitate the replacement of the filter element inside the mold shell (2).

2. The energy-saving landfill leachate nanofiltration separation device according to claim 1, characterized in that: The replacement assembly includes a clamping ring (10) and a baffle (11), the outside of the clamping ring (10) is fixedly connected to the inside of the mold shell (2), the inside of the baffle (11) is in contact with the inside of the mold shell (2), the inside of the baffle (11) is fixedly connected to a connecting pipe (12), the outside of the connecting pipe (12) is slidably connected to a nanofiltration membrane (13), the outside of the connecting pipe (12) is rotatably connected to a turntable (14), four sliding grooves (15) are provided inside the turntable (14), the inside of the sliding groove (15) is slidably connected to a clamping block (16), and the outside of the clamping block (16) is clamped to the inside of the clamping ring (10).

3. The energy-saving landfill leachate nanofiltration separation device according to claim 1, characterized in that: The right side of the high-pressure pump (7) is fixedly connected to the left side of the mounting frame (1).

4. The energy-saving landfill leachate nanofiltration separation device according to claim 1, characterized in that: The right end of the water outlet pipe (3) is fixedly connected to a water tank (5).

5. The energy-saving landfill leachate nanofiltration separation device according to claim 2, characterized in that: A turning handle (17) is inserted into the front end of the turntable (14), and the outer portion of the turning handle (17) is sleeved inside the mold shell (2).

6. The energy-saving landfill leachate nanofiltration separation device according to claim 2, characterized in that: The nanofiltration membrane (13) is externally sleeved inside the mold shell (2), and the rear side of the clamping block (16) is slidably connected to the front side of the baffle (11).

7. The energy-saving landfill leachate nanofiltration separation device according to claim 2, characterized in that: The connecting pipe (12) is externally sleeved inside the mold shell (2), and the rotating disk (14) is externally sleeved inside the mold shell (2).

8. The energy-saving landfill leachate nanofiltration separation device according to claim 2, characterized in that: The plurality of nanofiltration membranes (13) on the left side are high-pressure nanofiltration membrane components, and the plurality of nanofiltration membranes (13) on the right side are low-pressure nanofiltration membrane components.

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