RO reverse osmosis sewage treatment equipment and treatment method

Abstract

The invention discloses an RO reverse osmosis sewage treatment device and a treatment method. The sewage treatment device comprises a water treatment box, a first water treatment chamber and a second water treatment chamber are arranged in the water treatment box, a pre-filtering mechanism for pre-filtering sewage is arranged in the first water treatment chamber, and an RO reverse osmosis filtering mechanism is arranged in the second water treatment chamber. The RO reverse osmosis mechanism comprises two groups of RO reverse osmosis filter elements, the RO reverse osmosis filter elements comprise a raw water inlet, a reverse osmosis membrane layer and a water guide pipe, and the outlets of the water guide pipes of the two groups of RO reverse osmosis filter elements are both connected with flushing branches; the outlet end of the water guide pipe of the invention is connected with the flushing branch, so that when one RO reverse osmosis filter element is filtering, the other RO reverse osmosis filter element can be flushed, thereby realizing continuous sewage treatment and ensuring efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment equipment, and in particular to RO reverse osmosis sewage treatment equipment and a treatment method. Background Art

[0002] In order to ensure environmental safety and achieve efficient use of water resources, wastewater generated by production operations must be treated to meet standards before being discharged or recycled for secondary use. Compared with other traditional water treatment processes, reverse osmosis has been proven to be the most effective way to remove salt, chemical pollutants and heavy metals (such as lead). Long-term use of filter elements will also cause accumulation of impurities on the surface of the filter membrane, thereby affecting the treatment effect. In the prior art, backwashing is generally used to regenerate the filter element. However, during backwashing, the water treatment process needs to be stopped, which affects the progress and efficiency of the treatment and cannot ensure continuous and efficient treatment, which also limits production capacity. Summary of the invention

[0003] Technical purpose: In view of the above-mentioned deficiencies in existing sewage treatment, the present invention discloses an RO reverse osmosis sewage treatment equipment and treatment method which can continuously treat sewage and improve the flushing effect of the filter element.

[0004] Technical solution: To achieve the above technical objectives, the present invention adopts the following technical solution:

[0005] A RO reverse osmosis sewage treatment device comprises a water treatment box, a first water treatment chamber and a second water treatment chamber are arranged in the water treatment box, a pre-filtration mechanism for pre-filtering sewage is arranged in the first water treatment chamber, and an RO reverse osmosis filtering mechanism is arranged in the second water treatment chamber, the RO reverse osmosis mechanism comprises two groups of RO reverse osmosis filter elements, the RO reverse osmosis filter elements comprise a raw water inlet, a reverse osmosis membrane layer and a water guide pipe, the water guide pipe outlets of the two groups of RO reverse osmosis filter elements are both connected with flushing branches, and part of the clean water enters another RO reverse osmosis filter element through the flushing branch pipe for flushing and cleaning; a core pipe for auxiliary flushing is arranged inside the water guide pipe.

[0006] Preferably, the core tube of the present invention is slidably connected to the water pipe along the axial direction of the water pipe, a flushing hole corresponding to the position of the water inlet hole on the water pipe is opened on the core tube, and an elastic expansion joint for cooperating with the water pipe during flushing is provided on the outer wall of the core tube at the flushing hole.

[0007] Preferably, the elastic expansion joint of the present invention includes a fixing ring for fixedly connecting to the tube wall of the core tube, a turbulence joint for cooperating with the water inlet hole, and a expansion spring connecting the fixing ring and the turbulence joint, wherein the expansion spring is embedded in the wall surface of the fixing ring, and the end is connected to the tail end of the turbulence joint; the inner hole of the turbulence joint has a flared structure at both ends, and a throat is formed in the middle to disturb the flushing water flow passing through.

[0008] Preferably, the inner wall of the water pipe of the present invention is provided with a guide groove for guiding the sliding of the core tube, and a guide block for cooperating with the guide groove is provided on the wall of the core tube. The sliding direction of the core tube is limited by the guide block and the guide groove so that the flushing hole corresponds to the water inlet hole; a driving mechanism for driving the core tube to move is provided at the end of the water pipe.

[0009] Preferably, the pre-filtration mechanism of the present invention includes a first filter plate and a second filter plate arranged along the sewage flow direction, the first filter plate is provided with filter holes, the second filter plate is provided with a mesh adjustment block at a position corresponding to the filter holes, the mesh adjustment block is a variable cross-section structure with increasing cross-sectional area along the water flow direction, and the cross-sectional shape matches the shape of the filter holes, and an adjustment mechanism for adjusting the position of the second filter plate is provided on the side of the second filter plate away from the first filter plate.

[0010] Preferably, the adjustment mechanism of the present invention comprises a telescopic electric cylinder and guide rods spaced along the outer circumference of the second filter plate, the guide rods penetrate the second filter plate, and the driving end of the telescopic electric cylinder is connected to the second filter plate.

[0011] The present invention discloses a RO reverse osmosis sewage treatment method, using the above-mentioned RO reverse osmosis sewage treatment equipment, the method comprises the steps of:

[0012] S01, the sewage to be treated is sent to the treatment equipment, first enters the first water treatment chamber and is filtered by the pre-filter mechanism to remove large particles of impurities in the sewage;

[0013] S02. The pre-filtered sewage enters the RO reverse osmosis filtration mechanism, the purified water is discharged through the water pipe, and the concentrated raw water enters the second water treatment chamber to be recycled and processed; the two RO reverse osmosis filter elements of the RO reverse osmosis filtration mechanism are used alternately. When one RO reverse osmosis filter element is filtering the raw water, part of the generated clean water is used to simultaneously flush the other RO reverse osmosis filter element.

[0014] Preferably, in step S01 of the present invention, when the sewage is filtered using the pre-filter mechanism, the size of the filtering mesh is first adjusted by moving the second filter plate according to the particle size of the particles in the treated sewage.

[0015] Preferably, when the present invention utilizes clean water for flushing, the raw water inlet of the RO reverse osmosis filter element is closed, and the core tube is slid to a position corresponding to the flushing hole and the water inlet hole, the clean water enters through the water guide pipe, and flows out from the turbulent flow joint of the core tube, the flow state of the clean water changes in the turbulent flow joint, the filtrate on the reverse osmosis membrane layer is flushed, and enters the second water treatment chamber to be mixed with the concentrated raw water for post-treatment.

[0016] Beneficial effects: The RO reverse osmosis sewage treatment equipment and treatment method of the present invention have the following beneficial effects:

[0017] 1. The flushing branch pipe is connected to the outlet end of the water pipe in the present invention, so that when one RO reverse osmosis filter element is filtering, another RO reverse osmosis filter element can be flushed, thereby realizing continuous sewage treatment and ensuring efficiency.

[0018] 2. A core tube is arranged in the water conduit of the present invention, and the elastic expansion joint of the core tube can perform turbulent flow treatment on the flushing water entering the core tube, thereby increasing the cleaning effect on the filter element during flushing.

[0019] 3. The turbulent flow joint of the present invention adopts a retractable structural design, which can be staggered with the water inlet hole of the water pipe when not in use, so as not to affect the normal filtering operation of the filter element, and can use turbulence to improve the flushing effect when flushing is needed.

[0020] 4. The water guide pipe of the present invention is provided with a guide groove to guide the sliding of the core pipe, which can ensure the correspondence between the flushing hole and the water inlet hole, thereby avoiding misalignment and affecting the normal operation of the equipment.

[0021] 5. The pre-filtration mechanism of the present invention adopts a structural design with adjustable mesh size, which can meet the filtering needs in different situations, improve the adaptability of the device, and can perform multi-stage filtration on sewage according to the particle size, thereby achieving the effect of multi-stage filtration treatment in a limited equipment space. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0023] Figure 1 It is the overall structure diagram of the device of the present invention;

[0024] Figure 2 It is a cross-sectional view along the axis of the water guide pipe and the water guide hole of the present invention;

[0025] Figure 3 for Figure 2 A magnified view of the turbulent joint structure in the middle A area;

[0026] Figure 4 This is a schematic diagram of the structure of the pre-filtering mechanism of the present invention;

[0027] Among them, 1-water treatment box, 2-first water treatment chamber, 3-second water treatment chamber, 4-pre-filtration mechanism, 5-RO reverse osmosis filter element, 6-raw water inlet, 7-reverse osmosis membrane layer, 8-water guide pipe, 9-flushing branch pipe, 10-core pipe, 11-water inlet, 12-flushing hole, 13-fixing ring, 14-turbulence joint, 15-telescopic spring, 16-guide slot, 17-guide block, 18-first filter plate, 19-second filter plate, 20-filter mesh hole, 21-mesh adjustment block, 22-telescopic electric cylinder, 23-guide rod. DETAILED DESCRIPTION

[0028] Reference will now be made in detail to embodiments of the present disclosure, one or more examples of which are set forth herein below. Each embodiment and example is provided by explaining the apparatus, composition and materials of the present disclosure, rather than limiting. On the contrary, the following description provides a convenient illustration of an exemplary embodiment for implementing the present disclosure. In fact, it will be clear to those skilled in the art that various modifications and variations can be made in the teachings of the present disclosure without departing from the scope or spirit of the present disclosure. For example, a feature shown or described as a part of an embodiment can be used in conjunction with another embodiment to produce yet another embodiment. It is expected that the present disclosure covers such modifications and variations within the scope of the appended claims and their equivalents. Other objects, features and aspects of the present disclosure are disclosed in or clear from the following detailed description. It will be understood by those of ordinary skill in the art that this discussion is only a description of exemplary embodiments and is not intended to limit the wider aspects of the present disclosure.

[0029] like Figure 1-Figure 4 As shown, the present invention discloses an RO reverse osmosis sewage treatment equipment, including a water treatment box 1, a first water treatment chamber 2 and a second water treatment chamber 3 are arranged in the water treatment box, a pre-filtration mechanism 4 for pre-filtering sewage is arranged in the first water treatment chamber 2, and an RO reverse osmosis filtering mechanism is arranged in the second water treatment chamber 3, the RO reverse osmosis mechanism includes two groups of RO reverse osmosis filter elements 5, the RO reverse osmosis filter element 5 includes a raw water inlet 6, a reverse osmosis membrane layer 7 and a water guide pipe 8, the water guide pipe outlets of the two groups of RO reverse osmosis filter elements 5 are connected to a flushing branch pipe 9, and part of the clean water enters the other RO reverse osmosis filter element through the flushing branch pipe 9 for flushing and cleaning; a core pipe 10 for auxiliary flushing is arranged inside the water guide pipe 8.

[0030] The two groups of RO reverse osmosis filter elements 5 can operate alternately, and there is no need to set up separate backwashing facilities, which simplifies the structure of the water treatment equipment and ensures the continuity of sewage treatment. The core tube 10 does not affect the flow of filtered clean water during normal filtration, and during flushing, the reverse osmosis membrane layer is flushed after turbulent treatment of the incoming clean water, thereby improving the effect.

[0031] In order to facilitate the realization of the above functions, the working state of the core tube 10 is switched, such as Figure 2 and Figure 3 As shown, in a specific embodiment, the core tube 10 of the present invention is slidably connected to the water pipe 8 along the axial direction of the water pipe 8, a flushing hole 12 corresponding to the position of the water inlet hole 11 on the water pipe 8 is opened on the core tube 10, and an elastic expansion joint for cooperating with the water pipe during flushing is provided on the outer wall of the core tube 10 at the flushing hole 12; a guide groove 16 for guiding the sliding of the core tube 10 is provided on the inner wall of the water pipe 8, and a guide block 17 for cooperating with the guide groove 16 is provided on the wall surface of the core tube 10, and the sliding direction of the core tube 10 is limited by the guide block 17 and the guide groove 16, so that the flushing hole 12 corresponds to the water inlet hole 11; a driving mechanism for driving the core tube 10 to move is provided at the end of the water pipe 8.

[0032] The guide block 17 and the guide slot 16 are used to ensure that the flushing hole 12 will not be misaligned with the water inlet hole 11 during the sliding process, and the elastic expansion joint can be smoothly connected to the water inlet hole 11; the driving mechanism can be a cylinder or a linear motor with axial expansion and contraction capability, and its driving shaft can be passed through the axial direction of the water pipe 8 and connected to the end of the core tube 10. The water pipe 8 and the core tube 10 both adopt a structure with a blocked upper end and an open lower end, so that water can flow out and in from the open side.

[0033] In order to improve the flushing effect, facilitate the switching of working states, and reduce damage to the structure, the elastic telescopic joint of the present invention includes a fixing ring 13 fixedly connected to the tube wall of the core tube 10, a turbulence joint 14 for extending into the water inlet 11, and a telescopic spring 15 connecting the fixing ring 13 and the turbulence joint 14. The telescopic spring 15 is embedded in the wall surface of the fixing ring 13, and the end is connected to the tail end of the turbulence joint 14; the inner hole of the turbulence joint 14 adopts a flared structure at both ends, and a throat is formed in the middle to disturb the flushing water flow passing through. By utilizing the telescopic ability of the telescopic spring 15, the turbulence joint 14 can be retracted into the water conduit 8 when flushing is not needed.

[0034] like Figure 4 As shown, the pre-filtering mechanism 4 of the present invention includes a first filter plate 18 and a second filter plate 19 arranged along the flow direction of sewage, a filter mesh hole 20 is arranged on the first filter plate 18, and a mesh adjustment block 21 is arranged at a position corresponding to the filter mesh hole 20 of the second filter plate 19. The mesh adjustment block 21 has a variable cross-section structure with increasing cross-sectional area along the water flow direction, and the cross-sectional shape matches the shape of the filter mesh hole 20. An adjustment mechanism for adjusting the position of the second filter plate 19 is arranged on the side of the second filter plate 19 away from the first filter plate 18; preferably, the filter mesh hole of the present invention adopts a conical structure, and its inclination angle is consistent with the inclination angle formed by the gradual surface of the mesh adjustment block, thereby ensuring the consistency of the gap formed.

[0035] By using the mesh adjustment block 21 with a variable cross-sectional area on the second filter plate 19, when it moves, the gap between the inner hole of the filter mesh hole 20 and the wall surface of the mesh adjustment block 21 at the corresponding position will change, and the size of the gap is the diameter of the particles passing through the mesh.

[0036] The pre-filter mechanism 4 with a variable mesh structure of the present invention can adjust the mesh size according to different sewage treatment objects, and can also perform graded filtration according to different filtration requirements of the same type of sewage. The filtered sewage only needs to be circulated through the adjusted pre-filter mechanism 4 again, thereby facilitating the recovery of substances in the sewage. Compared with the method of using a multi-stage filtration structure for treatment in the prior art, it effectively saves the investment cost and occupied space of the equipment.

[0037] The adjustment mechanism of the present invention comprises a telescopic electric cylinder 22 and guide rods 23 arranged at intervals along the outer circumference of the second filter plate 19 . The guide rods 23 penetrate the second filter plate 19 . The driving end of the telescopic electric cylinder 22 is connected to the second filter plate 19 .

[0038] The present invention also discloses a RO reverse osmosis sewage treatment method, using the above-mentioned RO reverse osmosis sewage treatment equipment, the method comprises the steps of:

[0039] S01, the sewage to be treated is sent to the treatment equipment, and the size of the filtering mesh is adjusted by moving the second filter plate according to the particle size of the particles in the treated sewage. The sewage first enters the first water treatment chamber and is filtered by the pre-filter mechanism to remove large particle impurities in the sewage;

[0040] S02. The pre-filtered sewage enters the RO reverse osmosis filtration mechanism, the purified water is discharged through the water pipe, and the concentrated raw water enters the second water treatment chamber from the channel set in the reverse osmosis membrane layer of the RO reverse osmosis filter element to be recycled and processed; the two RO reverse osmosis filter elements of the RO reverse osmosis filtration mechanism are used alternately. When one RO reverse osmosis filter element is filtering the raw water, part of the generated clean water is used to simultaneously flush the other RO reverse osmosis filter element.

[0041] When the present invention uses clean water for flushing, the raw water inlet of the RO reverse osmosis filter element is closed, and the core tube is slid to a position corresponding to the flushing hole and the water inlet hole. The clean water enters through the water guide pipe and flows out from the turbulent flow joint of the core tube. The flow state of the clean water changes in the turbulent flow joint, and the filtered material on the reverse osmosis membrane layer is flushed. The clean water enters the second water treatment chamber and is mixed with the concentrated raw water for post-treatment. After the flushing is completed, the core tube is reset. A switching valve can also be set on the flushing branch pipe 9 to switch and control the flow state of the clean water on the branch pipe.

Claims

1. A RO reverse osmosis sewage treatment equipment, characterized in that: The invention comprises a water treatment box (1), a first water treatment chamber (2) and a second water treatment chamber (3) are arranged in the water treatment box, a pre-filtering mechanism (4) for pre-filtering sewage is arranged in the first water treatment chamber (2), and an RO reverse osmosis filtering mechanism is arranged in the second water treatment chamber (3), the RO reverse osmosis filtering mechanism comprises two groups of RO reverse osmosis filter elements (5), the RO reverse osmosis filter elements (5) comprise a raw water inlet (6), a reverse osmosis membrane layer (7) and a water guide pipe (8), the water guide pipe outlets of the two groups of RO reverse osmosis filter elements (5) are both connected to a flushing branch pipe (9), and part of the clean water enters the other RO reverse osmosis filter element through the flushing branch pipe (9) for flushing and cleaning; a core pipe (10) for auxiliary flushing is arranged inside the water guide pipe (8); The core tube (10) is slidably connected to the water conduit (8) along the axial direction of the water conduit (8), a flushing hole (12) corresponding to the position of the water inlet hole (11) on the water conduit (8) is opened on the core tube (10), and an elastic expansion joint for cooperating with the water conduit during flushing is provided on the outer wall of the core tube (10) at the flushing hole (12); The elastic expansion joint comprises a fixing ring (13) for fixingly connecting to the wall of the core tube (10), a turbulent flow joint (14) for cooperating with the water inlet hole (11), and a expansion spring (15) connecting the fixing ring (13) and the turbulent flow joint (14); the expansion spring (15) is embedded in the wall surface of the fixing ring (13), and the end thereof is connected to the tail end of the turbulent flow joint (14); the inner hole of the turbulent flow joint (14) has an expanded structure at both ends, and a throat is formed in the middle to disturb the flushing water flow passing through; The inner wall of the water guide pipe (8) is provided with a guide groove (16) for guiding the sliding of the core pipe (10); a guide block (17) for cooperating with the guide groove (16) is provided on the wall surface of the core pipe (10); the sliding direction of the core pipe (10) is limited by the guide block (17) and the guide groove (16), so that the flushing hole (12) corresponds to the water inlet hole (11); and a driving mechanism for driving the core pipe (10) to move is provided at the end of the water guide pipe (8); The pre-filtering mechanism (4) comprises a first filter plate (18) and a second filter plate (19) arranged along the flow direction of sewage, the first filter plate (18) being provided with filter mesh holes (20), the second filter plate (19) being provided with a mesh adjustment block (21) at a position corresponding to the filter mesh holes (20), the mesh adjustment block (21) being a variable cross-sectional structure with a cross-sectional area increasing along the water flow direction, the cross-sectional shape matching the shape of the filter mesh holes (20), and an adjustment mechanism for adjusting the position of the second filter plate (19) being provided on a side of the second filter plate (19) away from the first filter plate (18).

2. A RO reverse osmosis sewage treatment equipment according to claim 1, characterized in that: The adjustment mechanism comprises a telescopic electric cylinder (22) and guide rods (23) arranged at intervals along the outer circumference of the second filter plate (19); the guide rods (23) penetrate the second filter plate (19); and a driving end of the telescopic electric cylinder (22) is connected to the second filter plate (19).

3. A RO reverse osmosis wastewater treatment method, using a RO reverse osmosis wastewater treatment equipment according to any one of claims 1-2, characterized in that: Includes steps: S01, the sewage to be treated is sent to the treatment equipment, first enters the first water treatment chamber and is filtered by the pre-filter mechanism to remove large particles of impurities in the sewage; S02. The pre-filtered sewage enters the RO reverse osmosis filtration mechanism, the purified water is discharged through the water pipe, and the concentrated raw water enters the second water treatment chamber to be recycled and processed; the two RO reverse osmosis filter elements of the RO reverse osmosis filtration mechanism are used alternately. When one RO reverse osmosis filter element is filtering the raw water, part of the generated clean water is used to simultaneously flush the other RO reverse osmosis filter element.

4. A RO reverse osmosis sewage treatment method according to claim 3, characterized in that: In step S01, when the sewage is filtered using the pre-filter mechanism, the size of the filtering mesh is first adjusted by moving the second filter plate according to the particle size of the particles in the sewage.

5. A RO reverse osmosis sewage treatment method according to claim 3, characterized in that: When flushing with clean water, close the raw water inlet of the RO reverse osmosis filter element, and slide the core tube to the position corresponding to the flushing hole and the water inlet hole. Clean water enters through the water guide pipe and flows out from the turbulent joint of the core tube. The flow state of the clean water changes in the turbulent joint, flushes the filtrate on the reverse osmosis membrane layer, and enters the second water treatment chamber to be mixed with the concentrated raw water for post-treatment.

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