Water resource recycling system and control method

Abstract

The invention belongs to the technical field of water resource recycling, and discloses a water resource recycling system and a control method, the water resource recycling system comprises a domestic sewage pretreatment system, a rainwater pretreatment system, an industrial wastewater pretreatment system, a main treatment system and a post-treatment system; the domestic sewage pretreatment system, the rainwater pretreatment system and the industrial wastewater pretreatment system are respectively connected in parallel to the main treatment system through a multi-channel pipeline, and the other end of the main treatment system is connected to the post-treatment system through a pipeline. When the system is used, domestic sewage, rainwater or industrial wastewater can be independently treated, the domestic sewage, the rainwater or the industrial wastewater can also be treated at the same time, and the system has multiple treatment modes and can meet different treatment conditions for treatment. The treatment process and equipment are reduced on the whole, the treatment time is saved, the occupied area of the equipment is reduced, and the treatment and recovery effects on different types of water resources are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of water resource recycling, and in particular to a water resource recycling system and a control method. Background Art

[0002] As we all know, water is a key element in maintaining the ecosystem, environment and economy. Water resources are limited, and most cities in my country are in a state of water shortage to varying degrees. At present, most of the common water resource recycling uses water tanks and other water storage structures to collect recyclable water resources such as roofs and roads, and uses them through pressurized equipment such as water pumps when needed. Generally, a sewage treatment equipment only treats one type of sewage, resulting in the use of specialized equipment for the recycling and treatment of urban domestic sewage, industrial wastewater and rainwater, resulting in a large number of treatment equipment, large space occupation, and a large number of treatment processes, which in turn reduces the treatment and recycling effects of different types of water resources. Summary of the invention

[0003] The purpose of the present invention is to provide a water resource recycling system and a control method to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A water resource recycling system, comprising: a domestic sewage pretreatment system, a rainwater pretreatment system, an industrial wastewater pretreatment system, a main treatment system and a post-treatment system;

[0006] The domestic sewage pretreatment system, rainwater pretreatment system and industrial wastewater pretreatment system are respectively connected in parallel to the main treatment system through multi-channel pipelines, and the other end of the main treatment system is connected to the post-treatment system through a pipeline;

[0007] The domestic sewage pretreatment system comprises a grid pool, a regulating pool and a sedimentation pool connected in sequence, wherein the regulating pool is connected to the grid pool and the sedimentation pool respectively through a water pump and a pipeline, an regulating grid is arranged inside the grid pool, a lifting grid is arranged at the bottom of the regulating grid, and a collecting box is arranged at the discharge end of the lifting grid;

[0008] The rainwater pretreatment system comprises a rainwater collection tank, a regulating tank and a sedimentation tank connected in sequence, wherein the regulating tank is connected to the rainwater collection tank and the sedimentation tank respectively through a water pump and a pipeline, and the rainwater collection tank is connected to the rainwater collection device through a rainwater inlet;

[0009] The industrial wastewater pretreatment system comprises an industrial wastewater collection tank, a regulating tank and a sedimentation tank connected in sequence, wherein the regulating tank is connected to the industrial wastewater collection tank and the sedimentation tank respectively through a water pump and a pipeline, and the industrial wastewater collection tank is connected to the industrial wastewater discharge pipeline through an industrial wastewater inlet;

[0010] The regulating tanks in the domestic sewage pretreatment system, the rainwater pretreatment system and the industrial wastewater pretreatment system are all provided with a stirring mechanism, and the sedimentation tanks in the domestic sewage pretreatment system, the rainwater pretreatment system and the industrial wastewater pretreatment system are all provided with a height adjustment mechanism, and the driving end of the height adjustment mechanism is provided with an extraction pump; the top of the regulating tank in the rainwater pretreatment system and the industrial wastewater pretreatment system is also provided with a mixing mechanism;

[0011] The main treatment system includes a bioreactor, a membrane separator, an ultrafilter and a transition tank which are sequentially connected to a multi-channel pipeline, and the interior of the transition tank is connected to the post-treatment system through a transition pump and a pipeline;

[0012] The post-processing system includes a disinfector, a desalter and a clean water tank which are sequentially connected to the water outlet pipe of the transition pump. A water pump is arranged inside the clean water tank, and the water pump is connected to the daily water pipe through a water supply pipe.

[0013] Further preferably, a domestic sewage inlet is connected to the outer side of the grid pool of the domestic sewage pretreatment system, and the height of the domestic sewage inlet is higher than the surface of the regulating grid.

[0014] Further preferably, the adjusting grille is composed of a plurality of longitudinal grille bars and a plurality of transverse grille bars interlaced with each other, and the surfaces of the longitudinal grille bars and the transverse grille bars are respectively provided with grooves, and the grooves are mutually matched and connected; the surface of the lifting grille is provided with toothed grille bars, and the toothed grille bars are evenly distributed on the surface of the conveyor belt, one end of the conveyor belt is connected to the driving end of the driving motor, and a debris outlet is also provided on the side of the collection box.

[0015] Further preferably, a filter screen is also provided inside the regulating tank, and the stirring mechanism includes a stirring motor arranged at the top of the regulating tank, the driving end of the stirring motor passes through the regulating tank and the filter screen inside the regulating tank through a transmission shaft and is connected to the bearing seat at the bottom of the regulating tank, a plurality of stirring blades are also evenly provided on the outside of the transmission shaft, and a dosing port is also provided on the top of the regulating tank.

[0016] Further preferably, the outer side of the dosing port at the top of the regulating tank in the rainwater pretreatment system and the industrial wastewater pretreatment system is also connected to the discharge port at the bottom of the mixing mechanism, the interior of the mixing mechanism is a cylindrical structure, and two groups of spiral blades are arranged inside the mixing mechanism. The rotation directions of the two groups of spiral blades are opposite, and a feed port is arranged at the top of the mixing mechanism.

[0017] Further preferably, the height adjustment mechanism includes a telescopic cylinder arranged on the internal top wall of the sedimentation tank, the driving end of the telescopic cylinder is connected to the top of the extraction pump through a piston rod and a chuck, the water inlet end of the extraction pump is connected to an extraction pipe, and the water outlet end of the extraction pump is connected to a multi-channel pipeline through a transition pipe.

[0018] Further preferably, the membrane separator includes one or more of a rolled ultrafiltration membrane filter, a hollow fiber membrane filtration device, a rolled reverse osmosis filtration device, an electrodialysis membrane device, and a bipolar membrane device.

[0019] Further preferably, each of the pipelines and multi-channel pipelines is provided with a solenoid valve, and the solenoid valve wires are connected to the control system.

[0020] The present invention also provides a control method for a water resource recycling system, comprising the following steps:

[0021] Step 1: Determine the type of water resources to be treated, which includes domestic sewage, rainwater and industrial wastewater;

[0022] Step 2: When the domestic sewage is treated separately, the control system controls the domestic sewage pretreatment system, the main treatment system and the post-treatment system to treat the domestic sewage;

[0023] The control system controls the rainwater pre-treatment system, the main treatment system and the post-treatment system to treat the rainwater;

[0024] The control system controls the industrial wastewater pretreatment system, the main treatment system and the post-treatment system to treat the industrial wastewater;

[0025] Step 3: During unified treatment, the control system controls the domestic sewage pretreatment system, rainwater pretreatment system, industrial wastewater pretreatment system, main treatment system and post-treatment system to uniformly treat domestic sewage, rainwater and industrial wastewater.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] For domestic sewage containing a large amount of debris, a screen pool is set up to effectively remove the debris in the domestic sewage, and the domestic sewage is pre-treated in conjunction with the regulating tank and sedimentation tank, and then it is processed by the main treatment system and the post-treatment system. When treating rainwater and industrial wastewater, because there are less debris in both, it is only necessary to perform preliminary filtration through the regulating screen, and filter the debris in conjunction with the filter net in the regulating tank, and then it is processed by the main treatment system and the post-treatment system.

[0028] The system can treat domestic sewage, rainwater or industrial wastewater separately or simultaneously when in use. It has multiple treatment modes and can meet different treatment conditions. The overall treatment process and equipment are reduced, the treatment time and equipment area are reduced, and the treatment and recycling effects of different types of water resources are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 It is a schematic diagram of the domestic sewage pretreatment system of the present invention;

[0031] Figure 3 It is a schematic diagram of the rainwater pretreatment system of the present invention;

[0032] Figure 4 It is a schematic diagram of the industrial wastewater pretreatment system of the present invention;

[0033] Figure 5 is a schematic diagram of the main processing system of the present invention;

[0034] Figure 6 is a schematic diagram of a post-processing system of the present invention;

[0035] In the figure: 1. Domestic sewage pretreatment system; 2. Rainwater pretreatment system; 3. Industrial wastewater pretreatment system; 4. Domestic sewage inlet; 5. Grille pool; 6. Adjusting grille; 7. Lifting grille; 8. Collection box; 9. Water pump; 10. Debris outlet; 11. Adjusting tank; 12. Stirring motor; 13. Dosing port; 14. Filter; 15. Drive shaft; 16. Stirring blade; 17. Sedimentation tank; 18. Telescopic cylinder; 19. Piston rod; 20. Extraction pump ; 21. Extraction pipe; 22. Transition pipe; 23. Sewage outlet; 24. Rainwater collection tank; 25. Mixing mechanism; 26. Industrial wastewater inlet; 27. Industrial wastewater collection tank; 28. Multi-channel pipeline; 29. ​​Bioreactor; 30. Membrane separator; 31. Ultrafilter; 32. Transition tank; 33. Water outlet; 34. Transition pump; 35. Disinfector; 36. Desalinator; 37. Water purification tank; 38. Water pump; 39. Water supply pipeline; 40. Rainwater inlet. DETAILED DESCRIPTION

[0036] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0037] See also Figure 1-6 , the present invention provides a technical solution:

[0038] A water resource recycling system and control method, comprising: a domestic sewage pretreatment system 1, a rainwater pretreatment system 2, an industrial wastewater pretreatment system 3, a main treatment system and a post-treatment system;

[0039] The domestic sewage pretreatment system 1, the rainwater pretreatment system 2 and the industrial wastewater pretreatment system 3 are respectively connected in parallel to the main treatment system through multi-channel pipes 28, and the other end of the main treatment system is connected to the post-treatment system through a pipe;

[0040] The domestic sewage pretreatment system 1 comprises a grid pool 5, a regulating pool 11 and a sedimentation pool 17 which are connected in sequence. The regulating pool 11 is connected to the grid pool 5 and the sedimentation pool 17 respectively through a water pump 9 and a pipeline. An regulating grid 6 is arranged inside the grid pool 5, a lifting grid 7 is arranged at the bottom of the regulating grid 6, and a collecting box 8 is arranged at the discharge end of the lifting grid 7.

[0041] The rainwater pretreatment system 2 comprises a rainwater collection tank 24, a regulating tank 11 and a sedimentation tank 17 which are connected in sequence. The regulating tank 11 is connected to the rainwater collection tank 24 and the sedimentation tank 17 respectively through a water pump 9 and a pipeline. The rainwater collection tank 24 is connected to a rainwater collection device through a rainwater inlet 40.

[0042] The industrial wastewater pretreatment system 3 includes an industrial wastewater collection tank 27, a regulating tank 11 and a sedimentation tank 17 which are connected in sequence. The regulating tank 11 is connected to the industrial wastewater collection tank 27 and the sedimentation tank 17 through a water pump 9 and pipelines respectively. The industrial wastewater collection tank 27 is connected to the industrial wastewater discharge pipeline through an industrial wastewater inlet 26.

[0043] The regulating tanks 11 in the domestic sewage pretreatment system 1, the rainwater pretreatment system 2 and the industrial wastewater pretreatment system 3 are all provided with a stirring mechanism, and the sedimentation tanks 17 in the domestic sewage pretreatment system 1, the rainwater pretreatment system 2 and the industrial wastewater pretreatment system 3 are all provided with a height adjustment mechanism, and the driving end of the height adjustment mechanism is provided with an extraction pump 20; the top of the regulating tanks 11 in the rainwater pretreatment system 2 and the industrial wastewater pretreatment system 3 is also provided with a mixing mechanism 25;

[0044] The main treatment system includes a bioreactor 29, a membrane separator 30, an ultrafilter 31 and a transition tank 32 which are sequentially connected to a multi-channel pipeline 28. The interior of the transition tank 32 is connected to the post-treatment system through a transition pump 34 and a pipeline.

[0045] The post-treatment system includes a sterilizer 35, a desalter 36 and a clean water tank 37 which are sequentially connected to the water outlet pipe of the transition pump 34. A water pump 38 is arranged inside the clean water tank 37, and the water pump 38 is connected to the daily water pipe through a water supply pipe 39.

[0046] In the present invention, the outside of the grid pool 5 of the domestic sewage pretreatment system 1 is connected with a domestic sewage inlet 4 , and the height of the domestic sewage inlet 4 is higher than the surface of the regulating grid 6 .

[0047] In the present invention, the regulating grille 6 is composed of a plurality of longitudinal grille bars and a plurality of transverse grille bars interlaced with each other, and the surfaces of the longitudinal grille bars and the transverse grille bars are respectively provided with grooves, and the grooves are matched and connected with each other; the surface of the lifting grille 7 is provided with toothed grille bars, and the toothed grille bars are evenly distributed on the surface of the conveyor belt, one end of the conveyor belt is connected to the driving end of the driving motor, and a debris outlet 10 is also provided on the side of the collecting box 8.

[0048] In the present invention, a filter screen 14 is also provided inside the regulating tank 11, and the stirring mechanism includes a stirring motor 12 provided at the top of the regulating tank 11, and the driving end of the stirring motor 12 passes through the regulating tank 11 and the filter screen 14 inside the regulating tank 11 through a transmission shaft 15, and is connected to the bearing seat at the bottom of the regulating tank 11, and a plurality of stirring blades 16 are evenly provided on the outside of the transmission shaft 15, and a dosing port 13 is also provided on the top of the regulating tank 11. The dosing port 13 on the top of the regulating tank 11 in the rainwater pretreatment system 2 and the industrial wastewater pretreatment system 3 is also connected to the discharge port at the bottom of the mixing mechanism 25, and the inside of the mixing mechanism 25 is a cylindrical structure, and two sets of spiral blades are provided inside the mixing mechanism 25, and the rotation directions of the two sets of spiral blades are opposite, and a feed port is provided on the top of the mixing mechanism 25.

[0049] In the present invention, the height adjustment mechanism includes a telescopic cylinder 18 arranged on the top wall inside the sedimentation tank 17. The driving end of the telescopic cylinder 18 is connected to the top of the extraction pump 20 through a piston rod 19 and a clamping head. The water inlet end of the extraction pump 20 is connected to an extraction pipe 21, and the water outlet end of the extraction pump 20 is connected to the multi-channel pipeline 28 through a transition pipe 22.

[0050] In the present invention, the membrane separator 30 includes one or more of a rolled ultrafiltration membrane filter, a hollow fiber membrane filtration device, a rolled reverse osmosis filtration device, an electrodialysis membrane device, and a bipolar membrane device.

[0051] In the present invention, each pipeline and the multi-channel pipeline 28 are provided with a solenoid valve, and the solenoid valve wires are connected to the control system.

[0052] The present invention also provides a control method for a water resource recycling system, comprising the following steps:

[0053] Step 1: Determine the type of water resources to be treated, which includes domestic sewage, rainwater and industrial wastewater;

[0054] Step 2: When the domestic sewage is treated separately, the control system controls the domestic sewage pretreatment system 1, the main treatment system and the post-treatment system to treat the domestic sewage;

[0055] The control system controls the rainwater pre-treatment system 2, the main treatment system and the post-treatment system to treat the rainwater;

[0056] The control system controls the industrial wastewater pretreatment system 3, the main treatment system and the post-treatment system to treat the industrial wastewater;

[0057] Step 3: During unified treatment, the control system controls the domestic sewage pretreatment system 1, the rainwater pretreatment system 2, the industrial wastewater pretreatment system 3, the main treatment system and the post-treatment system to uniformly treat the domestic sewage, rainwater and industrial wastewater.

[0058] Example 1

[0059] Take the treatment of domestic sewage alone as an example:

[0060] Domestic sewage enters the surface of the regulating grille 6 at the top of the grille pool 5 from the domestic sewage inlet 4. The regulating grille 6 is composed of a plurality of longitudinal grille bars and a plurality of transverse grille bars interlaced. The longitudinal grille bars and the transverse grille bars are respectively provided with grooves on their surfaces, and the grooves are connected to each other. The domestic sewage is initially filtered by the criss-crossing regulating grilles 6. Then the domestic sewage passes through the lifting grille 7 at the bottom, and the toothed grille bars on the surface of the conveyor belt are driven by the driving motor and the conveyor belt to perform secondary filtration on the falling domestic sewage. The filtered debris is uniformly collected by the collection box 8 and uniformly discharged from the debris outlet 10. The domestic sewage after secondary filtration enters the regulating tank 11 through the action of the water pump 9 and the pipeline, and is filtered three times by the filter net 14 inside the regulating tank 11. After filtration, the medicine is added into the regulating tank 11 through the dosing port 13 on the top of the regulating tank 11, and the stirring blade 16 is driven by the stirring motor 12 to rotate to fully mix the domestic sewage and the medicine. After the mixing is completed, it enters the sedimentation tank 17 through the action of the water pump 9 and the pipeline. After sedimentation in the sedimentation tank 17, the extraction pump 20 clamped on its driving end is moved up and down by the height adjustment mechanism under the action of the telescopic cylinder 18 to extract the domestic sewage in the sedimentation tank 17, and the sediment in the sedimentation tank 17 is discharged through the sewage outlet 23 at the bottom. The precipitated domestic sewage enters the next treatment system, i.e., the main treatment system, through the transition pipe 22 and the multi-channel pipe 28, and enters the transition tank 32 after being filtered through the bioreactor 29, the membrane separator 30 and the ultrafilter 31 in sequence. A water outlet 33 is provided on the outside of the transition tank 32. The domestic sewage in the transition tank 32 can be connected to the irrigation, flushing and other pipes through the water outlet 33 for recycling. The domestic sewage in the transition tank 32 can also continue to be stored in the clean water tank 37 through the transition pump 34 and the pipe through the disinfector 35 and the desalinator 36 in sequence. The domestic sewage passing through the disinfector 35 and the desalinator 36 has reached the drinking water standard. A water pump 38 is provided inside the clean water tank 37, and the water pump 38 is connected to the daily water pipe through the water supply pipe 39.

[0061] Example 2

[0062] Take rainwater treatment alone as an example:

[0063] Rainwater enters the surface of the regulating grille 6 at the top of the rainwater collection pool 24 from the rainwater inlet 40. The regulating grille 6 is composed of a plurality of longitudinal grille bars and a plurality of transverse grille bars interlaced. The longitudinal grille bars and the transverse grille bars are respectively provided with grooves on their surfaces, and the grooves are connected to each other. The rainwater is initially filtered by the criss-crossed regulating grilles 6. Then the rainwater enters the regulating pool 11 through the action of the water pump 9 and the pipeline. The filter screen 14 inside the regulating pool 11 performs a secondary filtration on the rainwater. After filtration, the dosing port 13 at the top of the regulating pool 11 cooperates with the mixing mechanism 25 to add the reagent to the inside of the regulating pool 11. The inside of the mixing mechanism 25 is a cylindrical structure. Two sets of spiral blades are provided inside the mixing mechanism 25. The rotation directions of the two sets of spiral blades are opposite. A feed port is provided at the top of the mixing mechanism 25. The stirring motor 12 drives the stirring blade 16 to rotate to fully mix the rainwater and the reagent. After the mixing is completed, the rainwater enters the sedimentation tank 17 through the action of the water pump 9 and the pipeline. After sedimentation in the sedimentation tank 17, the extraction pump 20 clamped on its driving end is moved up and down by the height adjustment mechanism under the action of the telescopic cylinder 18 to extract the rainwater in the sedimentation tank 17, and the sediment in the sedimentation tank 17 is discharged through the sewage outlet 23 at the bottom. The precipitated rainwater enters the next treatment system, i.e., the main treatment system, through the transition pipe 22 and the multi-channel pipe 28, and enters the transition tank 32 after being filtered through the bioreactor 29, the membrane separator 30 and the ultrafilter 31 in sequence. A water outlet 33 is provided on the outside of the transition tank 32. The rainwater in the transition tank 32 can be connected to irrigation, flushing and other pipes through the water outlet 33 for recycling. The rainwater in the transition tank 32 can also continue to be stored in the clean water tank 37 through the transition pump 34 and the pipe through the disinfector 35 and the desalinator 36 in sequence. The rainwater that has passed through the disinfector 35 and the desalinator 36 has reached the drinking standard. A water pump 38 is provided inside the clean water tank 37, and the water pump 38 is connected to the daily water pipe through the water supply pipe 39.

[0064] Example 3

[0065] Take the treatment of industrial wastewater alone as an example:

[0066] Industrial wastewater enters the surface of the regulating grid 6 at the top of the industrial wastewater collection tank 27 from the industrial wastewater inlet 26. The regulating grid 6 is composed of a plurality of longitudinal grid bars and a plurality of transverse grid bars interlaced. The longitudinal grid bars and the transverse grid bars are respectively provided with grooves on their surfaces, and the grooves are connected to each other. The industrial wastewater is initially filtered by the criss-crossed regulating grid 6. Then the industrial wastewater enters the regulating tank 11 through the action of the water pump 9 and the pipeline, and the filter screen 14 inside the regulating tank 11 performs secondary filtration on it. After filtration, the dosing port 13 at the top of the regulating tank 11 cooperates with the mixing mechanism 25 to add the agent to the inside of the regulating tank 11. The inside of the mixing mechanism 25 is a cylindrical structure. Two sets of spiral blades are arranged inside the mixing mechanism 25. The rotation directions of the two sets of spiral blades are opposite. A feed port is arranged at the top of the mixing mechanism 25. The stirring motor 12 drives the stirring blade 16 to rotate to fully mix the industrial wastewater and the reagent. After the mixing is completed, the industrial wastewater enters the sedimentation tank 17 through the action of the water pump 9 and the pipeline. After sedimentation in the sedimentation tank 17, the extraction pump 20 clamped on its driving end is moved up and down by the height adjustment mechanism under the action of the telescopic cylinder 18 to extract the industrial wastewater in the sedimentation tank 17, and the sediment in the sedimentation tank 17 is discharged through the sewage outlet 23 at the bottom. The precipitated industrial wastewater enters the next treatment system, i.e., the main treatment system, through the transition pipe 22 and the multi-channel pipe 28, and enters the transition tank 32 after being filtered through the bioreactor 29, the membrane separator 30 and the ultrafilter 31 in sequence. A water outlet 33 is provided on the outside of the transition tank 32. The industrial wastewater in the transition tank 32 can be connected to irrigation, flushing and other pipes through the water outlet 33 for recycling. The industrial wastewater in the transition tank 32 can also continue to be stored in the clean water tank 37 through the transition pump 34 and the pipe through the disinfector 35 and the desalter 36 in sequence. The industrial wastewater that has passed through the disinfector 35 and the desalter 36 has reached the drinking water standard. A water pump 38 is provided inside the clean water tank 37, and the water pump 38 is connected to the daily water pipe through the water supply pipe 39.

[0067] Example 4

[0068] Take the simultaneous treatment of domestic sewage, rainwater, and industrial wastewater as an example:

[0069] The domestic sewage pretreatment system 1, the rainwater pretreatment system 2 and the industrial wastewater pretreatment system 3 are respectively connected in parallel to the main treatment system through the multi-channel pipe 28, and the other end of the main treatment system is connected to the post-treatment system through a pipe. The control system controls the opening of the solenoid valves on the three parallel systems, and after the pretreatment as described in the above embodiments 1-3, they are simultaneously connected to the main treatment system through the multi-channel pipe 28. After being filtered through the bioreactor 29, the membrane separator 30 and the ultrafilter 31 in sequence, the sewage enters the transition tank 32. A water outlet 33 is provided on the outside of the transition tank 32. The domestic sewage, rainwater and industrial wastewater in the transition tank 32 can be connected to the irrigation, flushing and other pipes through the water outlet 33 for recycling. The domestic sewage, rainwater and industrial wastewater in the transition tank 32 can also be further transferred through the transition pump 34 and the pipe to be stored in the clean water tank 37 through the disinfector 35 and the desalter 36 in sequence. The domestic sewage, rainwater and industrial wastewater that have passed through the disinfector 35 and the desalter 36 have reached the drinking water standard. A water pump 38 is provided inside the clean water tank 37. The water pump 38 is connected to the daily water pipe through the water supply pipe 39 for secondary recycling.

[0070] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any reference numerals in the claims should not be regarded as limiting the claims involved.

[0071] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A water resource recycling system, characterized in that: include: Domestic sewage pretreatment system (1), rainwater pretreatment system (2), industrial wastewater pretreatment system (3), primary treatment system and post-treatment system; The domestic sewage pretreatment system (1), the rainwater pretreatment system (2) and the industrial wastewater pretreatment system (3) are respectively connected in parallel to the main treatment system through multi-channel pipelines (28), and the other end of the main treatment system is connected to the post-treatment system through a pipeline; The domestic sewage pretreatment system (1) comprises a grid pool (5), a regulating pool (11) and a sedimentation pool (17) which are connected in sequence, the regulating pool (11) is connected to the grid pool (5) and the sedimentation pool (17) respectively through a water pump (9) and a pipeline, an regulating grid (6) is arranged inside the grid pool (5), a lifting grid (7) is arranged at the bottom of the regulating grid (6), and a collecting box (8) is arranged at the discharge end of the lifting grid (7); The rainwater pretreatment system (2) comprises a rainwater collection tank (24), a regulating tank (11) and a sedimentation tank (17) which are connected in sequence, the regulating tank (11) is connected to the rainwater collection tank (24) and the sedimentation tank (17) respectively via a water pump (9) and a pipeline, and the rainwater collection tank (24) is connected to a rainwater collection device via a rainwater inlet (40); The industrial wastewater pretreatment system (3) comprises an industrial wastewater collection tank (27), a regulating tank (11) and a sedimentation tank (17) which are connected in sequence, wherein the regulating tank (11) is connected to the industrial wastewater collection tank (27) and the sedimentation tank (17) respectively through a water pump (9) and a pipeline, and the industrial wastewater collection tank (27) is connected to the industrial wastewater discharge pipeline through an industrial wastewater inlet (26); The regulating tank (11) in the domestic sewage pretreatment system (1), the rainwater pretreatment system (2) and the industrial wastewater pretreatment system (3) is provided with a stirring mechanism inside, and the sedimentation tank (17) in the domestic sewage pretreatment system (1), the rainwater pretreatment system (2) and the industrial wastewater pretreatment system (3) is provided with a height adjustment mechanism inside, and the driving end of the height adjustment mechanism is provided with an extraction pump (20); the top of the regulating tank (11) in the rainwater pretreatment system (2) and the industrial wastewater pretreatment system (3) is also provided with a mixing mechanism (25); The main treatment system comprises a bioreactor (29), a membrane separator (30), an ultrafilter (31) and a transition tank (32) which are sequentially connected to a multi-channel pipeline (28); the interior of the transition tank (32) is connected to a post-treatment system via a transition pump (34) and a pipeline; The post-treatment system comprises a disinfector (35), a desalinator (36) and a clean water tank (37) which are sequentially connected to the water outlet pipe of the transition pump (34); a water pump (38) is arranged inside the clean water tank (37); and the water pump (38) is connected to the daily water pipe through a water supply pipe (39).

2. A water resource recycling system according to claim 1, characterized in that: The outside of the grid pool (5) of the domestic sewage pretreatment system (1) is connected to a domestic sewage inlet (4), and the height of the domestic sewage inlet (4) is higher than the surface of the regulating grid (6).

3. A water resource recycling system according to claim 1, characterized in that: The regulating grille (6) is composed of a plurality of longitudinal grille bars and a plurality of transverse grille bars interlaced with each other, and the surfaces of the longitudinal grille bars and the transverse grille bars are respectively provided with grooves, and the grooves are mutually matched and connected; the surface of the lifting grille (7) is provided with toothed grille bars, and the toothed grille bars are evenly distributed on the surface of the conveyor belt, one end of the conveyor belt is connected to the driving end of the driving motor, and the side of the collecting box (8) is also provided with a debris outlet (10).

4. A water resource recycling system according to claim 1, characterized in that: A filter screen (14) is also arranged inside the regulating tank (11), and the stirring mechanism comprises a stirring motor (12) arranged at the top of the regulating tank (11); the driving end of the stirring motor (12) penetrates the regulating tank (11) and the filter screen (14) inside the regulating tank (11) through a transmission shaft (15) and is connected to a bearing seat at the bottom of the regulating tank (11); a plurality of stirring blades (16) are evenly arranged on the outside of the transmission shaft (15); and a dosing port (13) is also arranged at the top of the regulating tank (11).

5. A water resource recycling system according to claim 4, characterized in that: The outside of the dosing port (13) at the top of the regulating tank (11) in the rainwater pretreatment system (2) and the industrial wastewater pretreatment system (3) is also connected to the discharge port at the bottom of the mixing mechanism (25). The interior of the mixing mechanism (25) is a cylindrical structure. Two groups of spiral blades are arranged inside the mixing mechanism (25). The rotation directions of the two groups of spiral blades are opposite. A feed port is arranged at the top of the mixing mechanism (25).

6. A water resource recycling system according to claim 1, characterized in that: The height adjustment mechanism comprises a telescopic cylinder (18) arranged on the top wall of the sedimentation tank (17); the driving end of the telescopic cylinder (18) is connected to the top of an extraction pump (20) through a piston rod (19) and a chuck; the water inlet end of the extraction pump (20) is connected to an extraction pipe (21); and the water outlet end of the extraction pump (20) is connected to a multi-channel pipeline (28) through a transition pipe (22).

7. A water resource recycling system according to claim 1, characterized in that: The membrane separator (30) includes one or more of a rolled ultrafiltration membrane filter, a hollow fiber membrane filtration device, a rolled reverse osmosis filtration device, an electrodialysis membrane device, and a bipolar membrane device.

8. A water resource recycling system according to claim 1, characterized in that: Each of the pipelines and the multi-channel pipeline (28) is provided with a solenoid valve, and the solenoid valve wires are connected to the control system.

9. A control method for a water resource recycling system according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: Determine the type of water resources to be treated, which includes domestic sewage, rainwater and industrial wastewater; Step 2: When the domestic sewage is treated separately, the control system controls the domestic sewage pretreatment system (1), the main treatment system and the post-treatment system to treat the domestic sewage; The control system controls the rainwater pre-treatment system (2), the main treatment system and the post-treatment system to treat the rainwater; The control system controls the industrial wastewater pretreatment system (3), the main treatment system and the post-treatment system to treat the industrial wastewater; Step 3: During unified treatment, the control system controls the domestic sewage pretreatment system (1), the rainwater pretreatment system (2), the industrial wastewater pretreatment system (3), the main treatment system and the post-treatment system to uniformly treat the domestic sewage, rainwater and industrial wastewater.

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