Reverse osmosis wastewater treatment equipment and method for water treatment plant

Abstract

The invention relates to the technical field of wastewater treatment, in particular to water treatment plant reverse osmosis wastewater treatment equipment and method.The water treatment plant reverse osmosis wastewater treatment equipment comprises a precipitation barrel used for wastewater precipitation, a drainage opening is formed in the annular barrel wall of the precipitation barrel, and a sewage outlet used for discharging precipitates is formed in the bottom wall of the precipitation barrel; the filter pressing unit is arranged in the precipitation barrel, is used for separating the wastewater from the precipitation, and comprises a filter pressing part which can move up and down and is arranged in the precipitation barrel. The filter pressing unit adopted by the invention can filter precipitates generated after wastewater treatment, the precipitates do not need to stand, the wastewater treatment efficiency is effectively improved, the treated wastewater can be discharged in real time in the filtering process, and the step of discharging the wastewater through a water pump is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, and particularly relates to a reverse osmosis wastewater treatment device and method for a water treatment plant. Background Art

[0002] Reverse osmosis technology has been widely used in the recycling of industrial wastewater. The reverse osmosis effluent accounts for about 75% of the reverse osmosis influent, and the rest is discharged as reverse osmosis wastewater. Reverse osmosis wastewater belongs to industrial high-salt wastewater. If directly discharged, reverse osmosis wastewater will waste water resources and damage the ecological environment.

[0003] In order to ensure that the reverse osmosis wastewater discharge meets the discharge requirements, it is necessary to remove heavy metal ions from the reverse osmosis wastewater. Existing reverse osmosis wastewater is usually treated by methods such as biological method, chemical precipitation method, adsorption method, etc. When the existing chemical precipitation method is used to treat reverse osmosis wastewater, the wastewater after grille filtration is first poured into a sedimentation tank, and then an appropriate amount of chemical precipitant is added to the wastewater. After that, the chemical precipitant reacts with the heavy metal ions in the wastewater to form a precipitate. Then, the precipitate is allowed to settle to the bottom of the sedimentation tank by static settlement, and the treated wastewater is then pumped out of the sedimentation tank. However, when the treated wastewater is separated from the precipitate, it usually needs to be static for a period of time, which increases the time required for wastewater treatment. Moreover, after the wastewater is separated from the precipitate, the precipitate still needs to be cleaned by existing sediment cleaning equipment or manually, resulting in low integration and increased labor costs for wastewater treatment.

[0004] Therefore, there is an urgent need to provide a treatment device that can improve the efficiency of wastewater treatment and reduce the cost of wastewater treatment. Summary of the Invention

[0005] Based on this, it is necessary to provide a reverse osmosis wastewater treatment device and method for a water treatment plant, aiming to solve the problems generated when treating heavy metal ions in existing reverse osmosis wastewater.

[0006] To achieve the above object, the present invention adopts the following technical solutions: A reverse osmosis wastewater treatment device for a water treatment plant, comprising: a sedimentation bucket for wastewater sedimentation, a drainage opening is provided on the annular barrel wall of the sedimentation bucket, and a sewage discharge port for discharging sediment is provided on the bottom wall of the sedimentation bucket.

[0007] It further includes a pressure filtration unit. The pressure filtration unit is arranged in the sedimentation bucket and is used for separating wastewater from sediment. The pressure filtration unit includes a pressure filtration part that can be moved up and down in the sedimentation bucket. During the downward movement of the pressure filtration part, the sediment is pushed towards the sewage discharge port while the drainage opening is opened. The opened drainage opening is used for discharging the filtered wastewater. A regulating part is connected to the pressure filtration part and is arranged on the sedimentation bucket and is used for changing the filtration method of the pressure filtration part.

[0008] The pressure filtration part includes a first filter plate and a second filter plate which are vertically distributed near the upper side of the precipitation barrel. Filter through holes are provided on both the first filter plate and the second filter plate. Filter cloths are arranged in a plurality of the filter through holes on the second filter plate. A sealing lifting plate which is slidably connected to the drainage opening is installed on the vertical side wall of the first filter plate, and the lower end of the sealing lifting plate slidably penetrates through the precipitation barrel.

[0009] It further includes a sealing unit which is arranged on the bottom wall of the precipitation barrel and is used to control the opening and closing of the sewage outlet.

[0010] After the pressure filtration part descends to near the bottom of the precipitation barrel, it pushes the sealing unit through the adjusting part, so that the sewage outlet is in an open state, and the pressure filtration part extrudes the sediment from the sewage outlet.

[0011] Preferably, an extrusion protrusion is integrally formed at the lower end of the second filter plate, and the filter through holes on the upper and lower sides are staggered. A plurality of blocking columns corresponding to the filter through holes on the second filter plate are installed at the lower end of the first filter plate.

[0012] Preferably, the pressure filtration part further includes a plurality of support members installed at the upper end of the second filter plate. The upper ends of the plurality of support members slidably penetrate through the first filter plate and are jointly installed with a linkage top plate. A plurality of return springs are installed between the lower end of the linkage top plate and the first filter plate.

[0013] Preferably, the adjusting part includes two spring telescopic rods installed on both sides of the upper end of the precipitation barrel through ear seats. A common adjusting member is installed at the upper ends of the two spring telescopic rods. A plurality of traction ropes are installed at both sides of the lower end of the adjusting member. The lower ends of the traction ropes penetrate through the corresponding filter through holes on the first filter plate and are fixedly connected to the second filter plate.

[0014] Preferably, the sealing unit includes a sewage discharge pipe installed on the bottom wall of the precipitation barrel and coaxially distributed with the sewage outlet. A sealing cover is hinged to the lower end of the sewage discharge pipe. A downward pressing part connected to the adjusting part is arranged on the outer periphery of the sewage discharge pipe. A cover plate limiting part connected to the bottom wall of the precipitation barrel is arranged on one side of the sewage discharge pipe away from the hinge joint with the sealing cover.

[0015] Preferably, the downward pressing part includes a downward pressing member arranged on the outer periphery of the sewage discharge pipe. Two transmission members which respectively slide through the corresponding ear seats and are connected to the adjusting member are symmetrically installed on the downward pressing member. A pushing plate is hinged to the lower end of the downward pressing member near the cover plate limiting part through a hinge frame. A blocking plate part fixedly connected to the downward pressing member is arranged on one side of the pushing plate close to the sewage discharge pipe, and the blocking plate part is used to limit the pushing plate to be in an inclined state.

[0016] Preferably, the downward pressing part further includes two connecting seats symmetrically installed at the lower end of the downward pressing member. A supporting member located at the lower end of the sealing cover is installed between the two connecting seats.

[0017] Preferably, the cover plate limiting part includes a limiting frame installed on the bottom wall of the sedimentation tank through a mounting frame and having an opening facing the sealing cover. A sliding channel is provided on the upper frame wall of the limiting frame. A limiting block located at the lower end of the sealing cover is slidably connected within the limiting frame. A telescopic spring is installed between the limiting frame and the limiting block. A force-receiving block located within the sliding channel is installed at the upper end of the limiting block. The end of the limiting block located at the lower end of the sealing cover is provided with an inclined surface.

[0018] Preferably, the movement of the pressure filtration part is realized through the driving part.

[0019] In addition, the present invention also provides a method for treating reverse osmosis wastewater in a water treatment plant, which specifically includes the following steps: S1: Inject the wastewater into the sedimentation tank installed at the working position. After the wastewater is injected into the sedimentation tank to a certain height, then pour the flocculant and chemical precipitant into the sedimentation tank, and the heavy metal ions in the wastewater form precipitates.

[0020] S2: After no more precipitates are generated in the wastewater, the pressure filtration part moves downward from the upper end of the sedimentation tank. The moving pressure filtration part pushes the precipitates in the wastewater downward. At the same time, the pressure filtration part opens the drainage opening, and the treated wastewater passes through the pressure filtration part and flows out in real time through the drainage opening.

[0021] S3: As the pressure filtration part continues to move downward, the wastewater in the sedimentation tank gradually decreases, and the generated precipitates accumulate downward. When the pressure filtration part moves to a certain depth in the sedimentation tank, the adjusting part seals the pressure filtration part. The pressure filtration part continues to move downward and pushes the sealing unit through the adjusting part, and the sealing unit opens the sewage outlet, and the pressure filtration part discharges the precipitates through the sewage outlet.

[0022] S4: After the pressure filtration part contacts the bottom wall of the sedimentation tank and then moves upward, the adjusting part resets and drives the sealing unit to seal the sewage outlet again.

[0023] S5: Then repeat steps S1 - S4 until all the wastewater is treated, and the work ends.

[0024] In summary, the present invention has the following beneficial effects: 1. The pressure filtration unit and the sealing unit adopted in the present invention cooperate with each other and are driven by the driving part, which can realize the functions of filtering the treated wastewater, discharging the wastewater, and discharging the precipitates, thereby realizing the function of multi-functional in one machine, reducing energy consumption, and improving the practicability of the wastewater treatment equipment.

[0025] 2. The pressure filtration unit adopted in the present invention can filter the precipitates generated during wastewater treatment without standing the precipitates, effectively improving the efficiency of wastewater treatment, and the treated wastewater can be discharged in real time during the filtration process, reducing the step of discharging the wastewater through a water pump.

[0026] 3. The filter press unit and the sealing unit used in the present invention cooperate to discharge the filtered sediment from the sediment bucket, reducing the steps for the staff to clean the sediment and lowering the labor cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below in conjunction with the drawings and embodiments.

[0028] Figure 1 The three-dimensional structure schematic diagram of the first perspective of the present invention is shown.

[0029] Figure 2 The three-dimensional structure schematic diagram of the second perspective of the present invention is shown.

[0030] Figure 3 The front view of the present invention is shown.

[0031] Figure 4 The left view of the present invention is shown.

[0032] Figure 5 Shown is Figure 4 the cross-sectional view taken along A-A in

[0033] Figure 6 Shown is Figure 5 the enlarged view of area B in

[0034] Figure 7 The three-dimensional structure cross-sectional view of the sediment bucket of the present invention is shown.

[0035] Figure 8 The three-dimensional structure schematic diagram of the filter press unit of the present invention is shown.

[0036] Figure 9 The working state change diagram of the present invention during wastewater treatment is shown.

[0037] Among them, the above-mentioned drawings include the following reference numerals: 1, sedimentation tank; 10, drainage opening; 11, sewage outlet; 12, wastewater input pipe; 13, reagent dosing pipe; 14, diversion frame; 2, filter press unit; 20, filter press section; 200, first filter plate; 201, second filter plate; 202, filter through-hole; 203, filter cloth; 204, plugging column; 205, sealing lifting plate; 206, support member; 207, linkage top plate; 208, return spring; 21, adjustment section; 210, spring telescopic rod; 211, adjustment member; 212, towing rope; 3, sealing unit; 30, sewage pipe; 31, sealing cover; 32, pressing section; 320, pressing member; 321, transmission member; 322, pushing plate; 323, blocking plate; 324, connecting seat; 325, supporting member; 33, cover plate limiting section; 330, limiting frame; 331, sliding channel; 332, limiting block; 333, telescopic spring; 334, stress block; 4, driving section; 40, positioning frame; 41, hydraulic push rod. Detailed implementation manners

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the following will describe in detail the specific implementation manners of the present invention with reference to the drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0039] Refer to Figure 1 and Figure 7 , a reverse osmosis wastewater treatment device for a water treatment plant, including a sedimentation tank 1 for wastewater sedimentation. A drainage opening 10 is provided on the annular barrel wall of the sedimentation tank 1, and a sewage outlet 11 for discharging sediment is provided on the bottom wall of the sedimentation tank 1.

[0040] During specific operation, before wastewater treatment, the sedimentation tank 1 is installed at the working position. The working position is provided with a working space for the wastewater treatment process. The sedimentation tank 1 is used for the sedimentation of heavy metal ions in the wastewater. The drainage opening 10 is used for discharging the treated wastewater, and the sewage outlet 11 is used for discharging the sediment of heavy metal ions.

[0041] Refer to Figure 1 , Figure 2 and Figure 7 , a wastewater input pipe 12 is installed at a position near the upper end of the annular barrel wall of the sedimentation tank 1. Two reagent dosing pipes 13 are also installed at a position near the upper end of the annular barrel wall of the sedimentation tank 1. A diversion frame 14 is installed at a position on the outer ring surface of the sedimentation tank 1 near the drainage opening 10.

[0042] During the specific operation, after the sedimentation tank 1 is installed, wastewater treatment is carried out. A liquid level signaler (prior art and not shown in the figure) is installed in the sedimentation tank 1. Existing electric control valves (not shown in the figure) are provided on both the wastewater input pipe 12 and the reagent dosing pipe 13. The wastewater enters the sedimentation tank 1 through the wastewater input pipe 12. When the liquid level of the wastewater injected into the sedimentation tank 1 rises to the height of the liquid level signaler, the liquid level signaler sends a signal to the controller. The controller controls the electric control valve on the wastewater input pipe 12 to close through an electric signal. At this time, the wastewater is no longer injected into the sedimentation tank 1. At the same time, the controller controls the electric control valves on the two reagent dosing pipes 13 to open through an electric signal. The flocculant and the chemical precipitant are respectively put into the sedimentation tank 1 through the two reagent dosing pipes 13. When the required amounts of the flocculant and the chemical precipitant are put in, the electric control valves on the two reagent dosing pipes 13 are closed. The flocculant and the chemical precipitant put into the sedimentation tank 1 react with the heavy metal ions in the wastewater and generate precipitation. In a possible implementation, the wastewater can be directly injected into the sedimentation tank 1 through the opening at the upper end of the sedimentation tank 1, and then the required flocculant and chemical precipitant for precipitation are poured into the sedimentation tank 1 to react with the heavy metal ions in the wastewater and generate precipitation.

[0043] Refer to Figures 1-4 , the reverse osmosis wastewater treatment equipment of this water treatment plant further includes a pressure filtration unit 2. The pressure filtration unit 2 is arranged in the sedimentation tank 1 and is used for separating the wastewater from the sediment. The pressure filtration unit 2 includes a pressure filtration part 20 that can move up and down in the sedimentation tank 1. The movement of the pressure filtration part 20 is realized by a driving part 4. Specifically, observing the sediment situation in the wastewater, when no more sediment is generated in the wastewater, the driving part 4 controls the pressure filtration part 20 to descend. During the descent of the pressure filtration part 20, the sediment is pushed towards the sewage outlet 11, realizing the function of separating the treated wastewater from the sediment. At the same time, the drainage opening 10 is opened, and the opened drainage opening 10 is used to drain the filtered wastewater.

[0044] Refer to Figure 1 、 Figure 5 and Figure 8, the pressure filtration part 20 includes a first filter plate 200 and a second filter plate 201 which are vertically distributed near the upper side of the sedimentation tank 1. An extrusion protrusion is integrally formed at the lower end of the second filter plate 201. Filter through holes 202 are formed on both the first filter plate 200 and the second filter plate 201. Filter cloths 203 are arranged in a plurality of the filter through holes 202 on the second filter plate 201. The filter through holes 202 on the upper and lower sides are staggered. A plurality of plugging columns 204 corresponding to the positions of the filter through holes 202 on the second filter plate 201 one by one are installed at the lower end of the first filter plate 200. The length of the plugging column 204 increases from the outside to the inside. A sealing lifting plate 205 slidably connected to the drainage opening 10 is installed on the vertical side wall of the first filter plate 200. The lower end of the sealing lifting plate 205 slidably penetrates through the sedimentation tank 1. The pressure filtration part 20 further includes a plurality of support members 206 installed at the upper end of the second filter plate 201. A retaining piece located at the upper end of the first filter plate 200 is installed on the support member 206. The upper ends of a plurality of support members 206 slidably penetrate through the first filter plate 200 and are jointly installed with a linkage top plate 207. A plurality of return springs 208 are installed between the lower end of the linkage top plate 207 and the first filter plate 200.

[0045] Refer to Figure 1 , Figure 2 and Figure 5 , the driving part 4 includes a positioning frame 40 fixedly installed at the working position. A fixed section of a hydraulic push rod 41 is installed on the positioning frame 40. The moving section of the hydraulic push rod 41 is fixedly connected to the first filter plate 200.

[0046] During specific operation, after the sedimentation tank 1 is installed in the working position, the positioning frame 40 is fixed in the working position. Before operation, the hydraulic push rod 41 is connected to the existing hydraulic pump. The filter plate one 200 and the filter plate two 201 are located above the sedimentation tank 1. During operation, when the wastewater no longer generates sediment and the sediment is still suspended in the sedimentation tank 1, the hydraulic push rod 41 is started. The moving section of the hydraulic push rod 41 drives the filter plate one 200 to move downward. The filter plate one 200 drives the linkage top plate 207 to move downward through multiple return springs 208. The linkage top plate 207 drives the filter plate two 201 to move downward through multiple support members 206. The support members 206 can be rod-shaped structures or tubular structures, and are not uniquely defined here. The downward-moving filter plate two 201 filters and separates the treated wastewater and sediment through the filter cloth 203 in multiple filter through holes 202. The treated wastewater passes through the filter cloth 203 and passes through multiple filter through holes 202 on the filter plate two 201. The sediment is pushed downward by the filter plate two 201 and the filter cloth 203. At the same time, the downward-moving filter plate one 200 drives the sealing lifting plate 205 to move downward, thereby gradually opening the drainage opening 10. The wastewater separated from the sediment passes through multiple filter through holes 202 on the filter plate one 200 and flows out from the drainage opening 10. The diversion frame 14 guides the outflowing wastewater to prevent the outflowing wastewater from spreading everywhere. The drainage opening 10 is gradually opened, and the wastewater separated from the sediment can be discharged in real time, and the discharge efficiency of the wastewater is high. It should be noted that a sealing rubber is provided in the drainage opening 10, and the sealing rubber increases the sealing strength between the drainage opening 10 and the sealing lifting plate 205 to prevent the wastewater from leaking out through the gap between the drainage opening 10 and the sealing lifting plate 205. If a large number of filter holes on the filter cloth 203 of the filter plate two 201 are blocked, only need to drive the moving section of the descending hydraulic push rod 41 to rise, that is, the filter plate two 201 rises, and the wastewater in the filter through holes 202 on the filter plate two 201 backwashes the filter cloth 203 to ensure that a large number of filter holes of the filter cloth 203 are unblocked. When the pressure filtration part 20 separates the sediment in the wastewater, it is not necessary to let the sediment in the wastewater stand still, effectively improving the separation efficiency of the wastewater and the sediment, and further improving the wastewater treatment efficiency.

[0047] Refer to Figure 1 、 Figure 2 and Figure 8 As shown in FIGS.

[0048] During specific operation, the descending filter plate II 201 drives multiple traction ropes 212 to move simultaneously. The multiple traction ropes 212 change from a slack state to a taut state. When the traction ropes 212 are in a straight state, the filter plate II 201 is located at a position close to the bottom of the sedimentation tank 1 and all the sediment is located below the filter plate II 201. It should be noted that the elastic force provided by the spring telescopic rods 210 on both sides is much greater than the elastic force provided by the multiple reset springs 208. The moving section of the hydraulic push rod 41 continues to drive the filter plate I 200 to move downward. The spring telescopic rods 210 on both sides limit the filter plate II 201 through the adjusting member 211 and multiple traction ropes 212. The adjusting member 211 can be a plate-like structure or a rod-like structure, and there is no unique limitation here. The stressed filter plate I 200 stretches the multiple reset springs 208 and moves relative to the multiple support members 206. The filter plate I 200 gradually moves towards the filter plate II 201 until they are in close contact. While the filter plate I 200 moves towards the filter plate II 201, it drives multiple plugging columns 204 to be inserted and matched with multiple corresponding filtering through holes 202 on the filter plate II 201, realizing the function of sealing the multiple filtering through holes 202 on the filter plate II 201, and preventing a large amount of accumulated sediment from passing through the multiple filtering through holes 202 on the filter plate II 201 during the subsequent extrusion and discharge process.

[0049] Refer to Figure 1 、 Figure 2 and Figure 7 ,the reverse osmosis wastewater treatment equipment of this water treatment plant further includes a sealing unit 3. The sealing unit 3 is arranged on the bottom wall of the sedimentation tank 1 and is used to control the opening and closing of the sewage outlet 11. Specifically, after the moving section of the hydraulic push rod 41 drives the pressure filtration part 20 to descend to a position close to the bottom of the sedimentation tank 1, the pressure filtration part 20 pushes the sealing unit 3 through the adjusting part 21, so that the sewage outlet 11 is in an open state, and the pressure filtration part 20 extrudes the sediment from the sewage outlet 11.

[0050] Refer to Figure 1 、 Figure 2 、 Figure 5 and Figure 6 ,the sealing unit 3 includes a sewage pipe 30 installed on the bottom wall of the sedimentation tank 1 and coaxially distributed with the sewage outlet 11. A sealing cover 31 is hinged to the lower end of the sewage pipe 30. A downward pressing part 32 connected to the adjusting part 21 is arranged on the outer periphery of the sewage pipe 30. A cover plate limiting part 33 connected to the bottom wall of the sedimentation tank 1 is arranged on one side of the sewage pipe 30 away from the hinge with the sealing cover 31.

[0051] Refer to Figure 1 、 Figure 2 、 Figure 5 and Figure 6, the pressing part 32 includes a pressing member 320 disposed on the outer periphery of the sewage discharge pipe 30. Two transmission members 321 are symmetrically installed on the pressing member 320 and respectively slide through the corresponding ear seats and are connected to the adjusting member 211. On one side of the lower end of the pressing member 320 close to the cover plate limiting part 33, a pushing plate 322 is hinged through a hinge frame. On one side of the pushing plate 322 close to the sewage discharge pipe 30, a blocking plate 323 fixedly connected to the pressing member 320 is provided. The blocking plate 323 is used to limit the pushing plate 322 to be in an inclined state. The pressing part 32 further includes two connecting seats 324 symmetrically installed at the lower end of the pressing member 320. A supporting member 325 located at the lower end of the sealing cover 31 is installed between the two connecting seats 324.

[0052] Refer to Figure 1 , Figure 2 , Figure 5 and Figure 6 , the cover plate limiting part 33 includes a limiting frame 330 installed on the bottom wall of the sedimentation tank 1 through a mounting frame and having an opening facing the sealing cover 31. A sliding channel 331 is formed on the upper frame wall of the limiting frame 330. A limiting block 332 located at the lower end of the sealing cover 31 is slidably connected in the limiting frame 330. A telescopic spring 333 is installed between the limiting frame 330 and the limiting block 332. A stress block 334 located in the sliding channel 331 is installed at the upper end of the limiting block 332. An inclined surface is provided at the end of the limiting block 332 located at the lower end of the sealing cover 31.

[0053] During specific operation, after the first filter plate 200 and the second filter plate 201 are attached, the moving section of the hydraulic push rod 41 continues to push the first filter plate 200. The first filter plate 200 and the second filter plate 201 are simultaneously stressed and pull the adjusting member 211 downward through multiple traction ropes 212. The adjusting member 211 moves downward and presses the spring telescopic rods 210 on both sides. At the same time, the adjusting member 211 drives the two transmission members 321 to move downward. The transmission members 321 can be rod-shaped structures or tubular structures, and there is no unique limitation here. The two transmission members 321 drive the pressing member 320 to move downward. The pressing member 320 can be an annular structure or a square structure, and there is no unique limitation here. The pressing member 320 drives the supporting member 325 to move downward through two connecting seats 324, so as to separate from the sealing cover 31. At the same time, the pressing member 320 drives the pushing plate 322 to move downward. While the pushing plate 322 moves downward, it slides on the upper end of the limiting frame 330 and pushes the stress block 334. The stress block 334 is stressed and drives the limiting block 332 to move away from the sealing cover 31 and squeeze the telescopic spring 333, thereby releasing the blocking of the sealing cover 31. The sealing cover 31 rotates along the hinge by its own gravity, thereby opening the lower end of the sewage pipe 30. It should be noted that the unprecipitated sediment is in a suspended state and has a certain fluidity, and can move under force. Subsequently, the second filter plate 201 continues to descend and discharges the sediment in the sediment bucket 1 from the sewage outlet 11 and the sewage pipe 30, realizing the function of cleaning the sediment inside the sediment bucket 1. The extrusion protrusion integrally formed at the lower end of the second filter plate 201 cooperates with the bottom wall of the sediment bucket 1 to ensure the effect of sediment discharge, reduce the frequency of sediment cleaning by the staff, and reduce the consumption of manpower. The hydraulic push rod 41 can realize the functions of filtering the treated wastewater, discharging the wastewater, and discharging the sediment during one working process, thereby realizing the function of multiple functions in one machine, effectively reducing the use of drive, reducing the energy consumption, and improving the practicability of the wastewater treatment equipment.

[0054] After the sediment is discharged, the hydraulic push rod 41 drives the first filter plate 200 and the second filter plate 201 to reset upward. The compressed spring telescopic rods 210 drive the adjusting member 211 to rise. The adjusting member 211 drives the pressing member 320 to rise through the two transmission members 321. The pressing member 320 drives the supporting member 325 to move upward through two connecting seats 324 and pushes the sealing cover 31. It should be noted that the elastic force provided by the two spring telescopic rods 210 is much greater than the elastic force of the telescopic spring 333. The sealing cover 31 is stressed and pushes the inclined surface at the lower end of the limiting block 332. The limiting block 332 is stressed and moves to avoid affecting the reset of the sealing cover 31. A sealing gasket for enhancing the airtightness with the lower end of the sewage pipe 30 is provided on the sealing cover 31. After the sealing cover 31 is closely attached to the lower end of the sewage pipe 30, the compressed telescopic spring 333 resets and drives the limiting block 332 to move to the lower end of the sealing cover 31, and the limiting block 332 re-limits the sealing cover 31.

[0055] After the filter plate 1 - 200 and the filter plate 2 - 201 are reset, repeat the previous steps for wastewater treatment (as Figure 9 shown), until the wastewater to be treated is completely processed, then the work ends.

[0056] In addition, the present invention also provides a method for treating reverse osmosis wastewater in a water treatment plant, which specifically includes the following steps: S1: Inject the wastewater into the sedimentation tank 1 installed at the working position. When the wastewater is injected to a certain height in the sedimentation tank 1, then pour the flocculant and chemical precipitant into the sedimentation tank 1, and the heavy metal ions in the wastewater form precipitates.

[0057] S2: After no more precipitates are generated in the wastewater, the pressure - filtration part 20 moves downward from the upper end of the sedimentation tank 1. The moving pressure - filtration part 20 pushes the precipitates in the wastewater downward. At the same time, the pressure - filtration part 20 opens the drainage opening 10, and the treated wastewater passes through the pressure - filtration part 20 and flows out in real - time through the drainage opening 10.

[0058] S3: As the pressure - filtration part 20 continues to move downward, the wastewater in the sedimentation tank 1 gradually decreases, and the generated precipitates accumulate downward. When the pressure - filtration part 20 moves to a certain depth in the sedimentation tank 1, the adjusting part 21 seals the pressure - filtration part 20. The pressure - filtration part 20 continues to move downward and pushes the sealing unit 3 through the adjusting part 21, and the sealing unit 3 opens the sewage outlet 11, and the pressure - filtration part 20 discharges the precipitates through the sewage outlet 11.

[0059] S4: After the pressure - filtration part 20 contacts the bottom wall of the sedimentation tank 1 and then moves upward, the adjusting part 21 resets and drives the sealing unit 3 to re - seal the sewage outlet 11.

[0060] S5: Then repeat steps S1 - S4 until all the wastewater is completely treated, then the work ends.

[0061] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the embodiments of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0062] In the description of the present invention, it should also be noted that unless otherwise clearly defined and limited, the terms "arranged", "installed", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] The embodiments of this specific implementation manner are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A reverse osmosis wastewater treatment device for a water treatment plant, comprising a sedimentation tank for wastewater sedimentation, characterized in that: A drainage opening is formed on the annular barrel wall of the sedimentation barrel, and a sewage discharge port for discharging sediment is formed on the bottom wall of the sedimentation barrel; A pressure filtration unit is arranged in the sedimentation barrel and is used for separating wastewater from sediment. The pressure filtration unit includes a pressure filtration part that can move up and down in the sedimentation barrel. During the downward movement of the pressure filtration part, the sediment is pushed towards the sewage discharge port while the drainage opening is opened, and the opened drainage opening is used for discharging the filtered wastewater. A regulating part is connected to the pressure filtration part and is arranged on the sedimentation barrel and is used for changing the filtration mode of the pressure filtration part; The pressure filtration part includes a first filter plate and a second filter plate that are vertically distributed near the upper side of the sedimentation barrel. Filter through holes are formed on both the first filter plate and the second filter plate. Filter cloths are arranged in a plurality of filter through holes on the second filter plate. A sealing lifting plate slidably connected to the drainage opening is installed on the vertical side wall of the first filter plate, and the lower end of the sealing lifting plate slidably penetrates through the sedimentation barrel; A sealing unit is arranged on the bottom wall of the sedimentation barrel and is used for controlling the opening and closing of the sewage discharge port; After the pressure filtration part descends to near the bottom of the sedimentation barrel, it pushes the sealing unit through the regulating part, so that the sewage discharge port is in an open state, and the pressure filtration part extrudes the sediment from the sewage discharge port.

2. The reverse osmosis wastewater treatment equipment for a water treatment plant according to claim 1, characterized in that: An extrusion protrusion is integrally formed at the lower end of the second filter plate, and the filter through holes on the upper and lower sides are staggered. A plurality of blocking columns corresponding to the positions of the filter through holes on the second filter plate are installed at the lower end of the first filter plate.

3. The reverse osmosis wastewater treatment equipment for a water treatment plant according to claim 2, characterized in that: The pressure filtration part further includes a plurality of support members installed at the upper end of the second filter plate. The upper ends of the plurality of support members slidably penetrate through the first filter plate and are jointly installed with a linkage top plate. A plurality of reset springs are installed between the lower end of the linkage top plate and the first filter plate.

4. A reverse osmosis wastewater treatment device for a water treatment plant according to claim 3, characterized in that: The regulating part includes two spring telescopic rods installed on both sides of the upper end of the sedimentation barrel through ear seats. A regulating member is jointly installed at the upper ends of the two spring telescopic rods. A plurality of traction ropes are installed at both sides of the lower end of the regulating member. The lower ends of the traction ropes penetrate through the corresponding filter through holes on the first filter plate and are fixed to the second filter plate.

5. A reverse osmosis wastewater treatment device for a water treatment plant according to claim 4, characterized in that: The sealing unit includes a sewage discharge pipe installed on the bottom wall of the sedimentation barrel and coaxially distributed with the sewage discharge port. A sealing cover is hinged to the lower end of the sewage discharge pipe. A downward pressing part connected to the regulating part is arranged on the outer periphery of the sewage discharge pipe. A cover plate limiting part connected to the bottom wall of the sedimentation barrel is arranged on one side of the sewage discharge pipe far from the hinged part with the sealing cover.

6. The reverse osmosis wastewater treatment equipment for a water treatment plant according to claim 5, characterized in that: The downward pressing part includes a downward pressing member arranged on the outer periphery of the sewage discharge pipe. Two transmission members respectively slidably penetrating through the corresponding ear seats and connected to the regulating member are symmetrically installed on the downward pressing member. A pushing plate is hinged to one side of the lower end of the downward pressing member close to the cover plate limiting part through a hinge frame. A blocking plate fixed to the downward pressing member is arranged on the side of the pushing plate close to the sewage discharge pipe. The blocking plate is used for limiting the pushing plate to be in an inclined state.

7. A reverse osmosis wastewater treatment device for a water treatment plant according to claim 6, characterized in that: The downward pressing part further includes two connecting seats symmetrically installed at the lower end of the downward pressing member. A supporting member located at the lower end of the sealing cover is installed between the two connecting seats.

8. The reverse osmosis wastewater treatment equipment for a water treatment plant according to claim 5, characterized in that: The cover plate limiting part includes a limiting frame installed on the bottom wall of the sedimentation barrel through a mounting frame and having an opening facing the sealing cover. A sliding channel is formed on the upper frame wall of the limiting frame. A limiting block located at the lower end of the sealing cover is slidably connected in the limiting frame. A telescopic spring is installed between the limiting frame and the limiting block. A stress block located in the sliding channel is installed at the upper end of the limiting block. An inclined surface is arranged at the end of the limiting block located at the lower end of the sealing cover.

9. The reverse osmosis wastewater treatment equipment for a water treatment plant according to claim 1, characterized in that: The movement of the pressure filtration part is realized through a driving part.

10. A method for treating reverse osmosis wastewater in a water treatment plant, characterized in that, It is completed in cooperation with the reverse osmosis wastewater treatment equipment of the water treatment plant as described in claim 1, including the following steps: S1: Inject the wastewater into the sedimentation tank installed at the working position. After the wastewater is injected into the sedimentation tank to a certain height, pour the flocculant and chemical precipitant into the sedimentation tank, and the heavy metal ions in the wastewater form precipitates. S2: After no more precipitates are generated in the wastewater, the pressure filtration part moves downward from the upper end of the sedimentation tank. The moving pressure filtration part pushes the precipitates in the wastewater downward. At the same time, the pressure filtration part opens the drainage opening, and the treated wastewater passes through the pressure filtration part and flows out through the drainage opening in real time. S3: As the pressure filtration part continues to move downward, the wastewater in the sedimentation tank gradually decreases, and the generated precipitates accumulate downward. When the pressure filtration part moves to a certain depth in the sedimentation tank, the adjusting part seals the pressure filtration part. The pressure filtration part continues to move downward and pushes the sealing unit through the adjusting part, and the sealing unit opens the sewage outlet, and the pressure filtration part discharges the precipitates through the sewage outlet. S4: After the pressure filtration part contacts the bottom wall of the sedimentation tank, it moves upward, and the adjusting part resets and drives the sealing unit to seal the sewage outlet again. S5: Then repeat steps S1 - S4 until all the wastewater is treated and the work ends.

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