Production tail water treatment system

Abstract

The utility model discloses a production tail water treatment system which comprises a first wastewater gathering unit for treating and gathering domestic drinking water, a second wastewater gathering unit for treating and gathering production wastewater, and a domestic sewage station treatment and discharge unit for treating domestic wastewater, the wastewater adjusting tank is communicated with the first wastewater gathering unit and the second wastewater gathering unit; according to the improved and optimized water plant production tail water treatment system, two tail water treatment routes are adopted, a water plant production waste water line enters the waste water adjusting tank in a unified mode, turbidity treatment is carried out through sedimentation integration, treated water returns to the front end of a water plant, an online detection instrument is additionally arranged at the drainage water outlet end, and the water treatment efficiency is improved. The domestic sewage station treatment and discharge unit treats COD, ammonia nitrogen, total nitrogen, total phosphorus and other indexes through the MBR membrane treatment box body, treated water meets the discharge standard and is used for water plant greening and fruit tree irrigation, and tail water recycling is achieved.

Description

Technical Field

[0001] The utility model relates to the field of water treatment, in particular to a production tail water treatment system. Background Art

[0002] In some nuclear power plants, the design scale of wastewater treatment plants is 1300m 3 / d, the average daily processing capacity in 2021 is about 680m 3 After adding ferric chloride coagulant for coagulation, sedimentation and disinfection, the sludge water produced by the system is discharged after being treated by adding polyacrylamide for flocculation and dehydration. The sludge meets the standards and is transported for disposal. The sludge filtrate is returned to the regulating tank. The water supply plant is equipped with a domestic sewage treatment station with a design scale of 24m 3 / d, the average daily processing capacity in 2021 is about 8m 3 It mainly treats office and domestic sewage from office buildings, management buildings and fire stations. The effluent from the domestic sewage station also enters the production wastewater station for further treatment and is discharged into the environment after meeting the standards. The residual sludge generated by the domestic sewage station is regularly pumped out and transported for disposal.

[0003] In order to strictly implement the high standards for protecting the ecological environment and save scarce drinking water resources, we have carried out recycling and utilization transformation of production wastewater and transformed the entire production wastewater treatment process.

[0004] In the existing production tail water treatment process, the first-stage ultrafiltration enhanced backwash quick flush discharge, the second-stage V-type filter forward wash drainage, the first-stage ultrafiltration water backwash discharge, and the first-stage laminated filter backwash water are directly injected into the drainage pool without being treated; the domestic sewage station treatment and discharge unit is injected into the regulating tank for treatment together with the second-stage V-type filter backwash water, the second-stage coagulation sedimentation tank mud water, the first-stage multi-media backwash water, and the neutralization tank neutralization treatment drainage. Without better utilization, the existing treatment system is difficult to meet the new high-standard environmental protection requirements. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a production tail water treatment system which saves water resources, recycles waste water and transforms the entire waste water treatment process.

[0006] The technical solution adopted by the utility model to solve its technical problem is: a production tail water treatment system, including a first wastewater aggregation unit for treating drinking water, a second wastewater aggregation unit for treating production wastewater, and a domestic sewage station treatment and discharge unit for treating domestic wastewater;

[0007] A wastewater regulating tank, the wastewater regulating tank being connected to the first wastewater aggregating unit and the second wastewater aggregating unit, and being used for conditioning and treating domestic drinking water and domestic wastewater;

[0008] An online detector installed between the first wastewater aggregation unit and the wastewater regulating tank;

[0009] The sedimentation tank is connected to and receives the drinking water and domestic wastewater after conditioning treatment in the wastewater regulating tank, and the sedimentation tank performs coagulation, flocculation, inclined plate clarification, sludge sedimentation and concentration treatment on the conditioned drinking water and domestic wastewater before lifting them to the front end of the water plant;

[0010] The MBR membrane treatment box is connected to the domestic sewage treatment and discharge unit, and the MBR membrane treatment box purifies domestic wastewater.

[0011] Furthermore, in the production tail water treatment system, the first wastewater aggregation unit preferably includes V-type filter backwash water, coagulation sedimentation tank sludge water, multi-media backwash water, and neutralization treatment water from the neutralization tank, which are respectively connected to the wastewater regulating tank through pipelines;

[0012] The online detector is installed on the pipeline between the wastewater after neutralization treatment in the neutralization tank and the wastewater regulating tank.

[0013] Furthermore, in the production tail water treatment system, the second wastewater aggregation unit preferably includes a first-stage ultrafiltration enhanced backwash fast flush discharge, a second-stage V-type filter forward wash drainage, a first-stage ultrafiltration water backwash discharge, and a first-stage laminated filter backwash water, which are connected to the wastewater regulating tank through pipelines respectively.

[0014] Furthermore, in the production tail water treatment system, preferably, the production tail water treatment system also includes a drainage tank connected between the sedimentation tank and the front end of the water plant, and detection instruments are installed on the pipeline between the drainage tank and the front end of the water plant.

[0015] Furthermore, in the production tail water treatment system, the bottom of the sedimentation tank is preferably connected to a sludge balancing tank, and the MBR membrane treatment box is connected to the sludge balancing tank through a pipeline, one side of the sludge balancing tank is connected to a dewatering machine, and one side of the dewatering machine is connected to a mud hopper.

[0016] Furthermore, in the production tail water treatment system, the sedimentation tank preferably includes a reaction tank connected to the wastewater regulating tank through a pipeline, one side of the reaction tank is connected to a pre-sedimentation and concentration tank, and the top of the pre-sedimentation and concentration tank is connected to an inclined plate separation tank.

[0017] Furthermore, in the production tailwater treatment system, preferably, the sedimentation tank further comprises a draft tube installed in the reaction tank, the reaction tank is equipped with a flocculation agitator, and the flocculation agitator is located in the draft tube;

[0018] A conical thickening scraper is installed at the bottom of the pre-sedimentation and concentration tank. A sludge return pipe extending to the interior is installed at the bottom of the pre-sedimentation and concentration tank. The sludge return pipe is provided with a thickening sludge pump. The output end of the thickening sludge pump is connected to the inlet of the reaction tank.

[0019] Furthermore, in the production tailwater treatment system, the MBR membrane treatment box preferably includes a pretreatment system, a biochemical treatment system, and an auxiliary system;

[0020] The pretreatment system is connected to the domestic sewage treatment and discharge unit through a pipeline, and the pretreatment system, biochemical treatment system and auxiliary system are connected in sequence through a pipe pump assembly.

[0021] Furthermore, in the production tailwater treatment system, the pretreatment system preferably includes a pretreatment tank connected to the domestic sewage treatment and discharge unit through a pipeline, the pretreatment tank is connected to a regulating tank, and a grid is installed in the regulating tank;

[0022] The biochemical treatment system includes an anoxic tank connected to the regulating tank through a pipe pump assembly, and the anoxic tank is connected to a membrane bioreactor;

[0023] The auxiliary system includes a dosing chemical phosphorus removal and disinfection system and a clear water tank. The dosing chemical phosphorus removal and disinfection system are installed on the membrane bioreactor, and the membrane bioreactor is connected to one side of the clear water tank through a pipe pump component.

[0024] Furthermore, in the production tailwater treatment system, the membrane bioreactor preferably includes an aerobic aeration tank and a membrane module;

[0025] The aerobic aeration tank is connected to one side of the anoxic tank, the membrane assembly is immersed in the aerobic aeration tank, and the membrane assembly is connected to the clean water tank through a tube pump assembly.

[0026] The implementation of this utility model has the following beneficial effects: after the transformation and optimization, the water plant production tail water treatment system adopts a two-way tail water treatment route, the water plant production waste water line enters the waste water regulating tank in a unified manner, and undergoes turbidity treatment through integrated sedimentation. After treatment, the water is returned to the front end of the water plant, and an online detection instrument is added to the outlet end of the drainage; the domestic sewage station treatment and discharge unit uses the MBR membrane treatment box to treat COD, ammonia nitrogen, total nitrogen, total phosphorus and other indicators. After treatment, the waste water meets the discharge standards and is used for water plant greening, fruit tree irrigation, etc., to achieve tail water recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0028] Figure 1 This is a schematic diagram of the process of the production tail water treatment system of the utility model;

[0029] Figure 2 It is a structural diagram of the sedimentation tank of the utility model;

[0030] Figure 3 It is a structural schematic diagram of the MBR membrane treatment box of the utility model.

[0031] Explanation of the numbers in the schematic diagram:

[0032] 1. First wastewater collection unit; 11. V-type filter backwash water; 12. Coagulation sedimentation tank sludge water; 13. Multi-media backwash water; 14. Neutralization tank post-treatment drainage; 15. Domestic sewage treatment and discharge unit;

[0033] 2. Second wastewater collection unit; 21. First-stage ultrafiltration enhanced backwash fast flush discharge; 22. Second-stage V-type filter forward wash drainage; 23. First-stage ultrafiltration water backwash discharge; 24. First-stage laminated filter backwash water;

[0034] 3. Wastewater regulating tank;

[0035] 4. Online detector;

[0036] 5. Sedimentation tank; 51. Reaction tank; 52. Pre-sedimentation and concentration tank; 53. Inclined plate separation tank; 54. Draft tube; 55. Flocculation agitator; 56. Conical thickening scraper; 57. Sludge return pipe; 58. Thickened sludge pump;

[0037] 7. MBR membrane treatment box; 71. Pretreatment tank; 72. Equalization tank; 73. Grille; 74. Anoxic tank; 75. Membrane bioreactor; 76. Clear water tank; 751. Aerobic aeration tank; 752. Membrane module;

[0038] 8. Drainage tank; 81. Testing instrument;

[0039] 9. Sludge balance bin; 91. Dewatering machine; 92. Mud hopper. DETAILED DESCRIPTION

[0040] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings and are constructed and operated in specific directions. They are only for the convenience of describing the present technical solution and do not indicate that the devices or components referred to must have specific directions. Therefore, they should not be understood as limiting the present invention.

[0041] It should also be noted that, unless otherwise clearly specified and limited, terms such as "installed", "connected", "connected", "fixed", and "set" should be understood in a broad sense. For example, they can be fixedly connected, detachably connected, or integrated; they can be mechanically connected or electrically connected; they can be directly connected or indirectly connected through an intermediate medium, and they can be internal connections between two elements or interactions between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intervening elements. The terms "first", "second", and "third" are only used to facilitate the description of the present technical solution and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", and "third" can explicitly or implicitly include one or more of these features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0042] In the following description, specific details such as specific system structures and techniques are provided for purposes of illustration, not limitation, to facilitate a thorough understanding of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid obscuring the description of the present invention with unnecessary detail.

[0043] The technical solution adopted by the utility model to solve the technical problem is: Figures 1 to 3 The utility model discloses a production tail water treatment system, comprising a first wastewater aggregation unit 1 for treating drinking water, a second wastewater aggregation unit 2 for treating production wastewater, and a domestic sewage station treatment and discharge unit 15 for treating domestic wastewater.

[0044] The wastewater regulating tank 3 is connected to the first wastewater aggregation unit 1 and the second wastewater aggregation unit 2, and is used for conditioning and treating domestic drinking water and domestic wastewater;

[0045] An online detector 4 is installed between the first wastewater aggregation unit 1 and the wastewater regulating tank 3;

[0046] The sedimentation tank 5 is connected to and receives the drinking water and domestic wastewater after conditioning treatment in the wastewater regulating tank 3, and the sedimentation tank 5 performs coagulation, flocculation, inclined plate clarification, sludge sedimentation and concentration treatment on the conditioned drinking water and domestic wastewater before lifting them to the front end of the water plant;

[0047] The MBR membrane treatment box 7 is connected to the domestic sewage treatment and discharge unit 15, and the MBR membrane treatment box 7 purifies the domestic wastewater.

[0048] Specifically, drinking water and industrial wastewater from the water plant enter the wastewater conditioning tank 3 for conditioning, then enter the sedimentation tank 5 for sludge coagulation and sedimentation. The treated water is then pumped to the front end of the water plant for tailwater recycling. The domestic wastewater from the water plant is purified by the MBR membrane treatment tank 7 and used for landscaping, fruit tree irrigation, and other purposes.

[0049] Two tail water treatment routes are adopted to achieve high standards of environmental protection and increase the tail water recovery rate.

[0050] Preferably, domestic drinking water is kitchen water or drinking water, etc.; domestic wastewater is toilet water, etc., which are not limited here.

[0051] The first wastewater aggregation unit 1 includes a V-type filter backwash water 11, a coagulation sedimentation tank sludge water 12, a multi-media backwash water 13, and a neutralization tank neutralized and treated drainage 14, which are respectively connected to the wastewater regulating tank 3 through pipelines; the online detector 4 is installed on the pipeline between the neutralization tank neutralized and treated drainage 14 and the wastewater regulating tank 3.

[0052] Preferably, the pipeline is a pipe made of plastic, steel, iron, cement, etc. The online detector 4 of the present device is an online pH detector, which is not limited here and can be replaced with a different detector according to needs. The online pH detector 4 is installed in the neutralization tank and the treated wastewater 14 to measure the pH value.

[0053] Specifically, the V-type filter backwash water 11, the coagulation and sedimentation tank sludge water 12, the multi-media backwash water 13, and the neutralization tank neutralization treatment wastewater 14 are discharged into the wastewater regulating tank 3 for collection and collection. After conditioning in the wastewater regulating tank 3, it enters the sedimentation tank 5. The domestic sewage treatment and discharge unit 15 is changed to a separate tailwater discharge, which is purified and reused.

[0054] The second wastewater aggregation unit 2 includes a first-stage ultrafiltration enhanced backwash fast flush discharge 21, a second-stage V-type filter forward wash drainage 22, a first-stage ultrafiltration water backwash discharge 23, and a first-stage laminated filter backwash water 24, which are connected to the wastewater regulating tank 3 through pipelines.

[0055] Preferably, the first-stage ultrafiltration enhanced backwash quick flush discharge 21, the second-stage V-type filter forward wash drainage 22, the first-stage ultrafiltration water backwash discharge 23, and the first-stage laminated filter backwash water 24 are all collected in the wastewater regulating tank 3 and the sedimentation tank 5 for treatment before entering the drainage tank 8, and then lifted to the front end of the water plant for utilization.

[0056] To add explanation, the wastewater regulating tank 3 mainly has three functions: regulating water volume, balancing water quality and pre-treatment.

[0057] The production tail water treatment system further includes a drainage tank 8 connected between the sedimentation tank 5 and the front end of the water plant. A detection instrument 81 is installed on the pipeline between the drainage tank 8 and the front end of the water plant.

[0058] Preferably, the detection instrument 81 can be an open channel flow meter, a pH meter, a turbidity meter, a COD meter, etc., which is not limited in this solution and can be selected according to needs.

[0059] Depend on Figure 1 It is shown that the bottom of the sedimentation tank 5 is also connected to a sludge balancing tank 9, and the MBR membrane treatment box 7 is connected to the sludge balancing tank 9 through a pipeline. One side of the sludge balancing tank 9 is connected to a dewatering machine 91, and one side of the dewatering machine 91 is connected to a mud hopper 92.

[0060] Preferably, the sludge or sewage containing sludge processed and purified by the sedimentation tank 5 and the MBR membrane treatment box 7 is discharged to the sludge balance tank 9, and then the water in the sludge is separated by the dehydrator 91, and finally the separated sludge enters the mud hopper 92.

[0061] Depend on Figure 2 It is shown that the sedimentation tank 5 includes a reaction tank 51 connected to the wastewater regulating tank 3 through a pipeline, a pre-precipitation and concentration tank 52 is connected to one side of the reaction tank 51, and an inclined plate separation tank 53 is connected to the top of the pre-precipitation and concentration tank 52.

[0062] Specifically, after conditioning in wastewater regulating tank 3, production wastewater is lifted to sedimentation tank 5 via a lifting system. In reaction tank 51 and pre-sedimentation concentration tank 52, it reacts with polyaluminium chloride (PAC) and PAM (Phenolic Acid). The resulting alum flocs adsorb and capture turbidity and suspended solids in the water, forming sludge. After sedimentation and concentration, the effluent is discharged, thereby removing turbidity and suspended solids. The effluent passes through inclined plate clarifier 53, further removing fine alum flocs to achieve high-quality effluent. The effluent from drainage tank 8 is then lifted to the front end of the water plant.

[0063] The sedimentation tank 5 also includes a guide tube 54 installed in the reaction tank 51. The reaction tank 51 is equipped with a flocculation agitator 55, and the flocculation agitator 55 is located in the guide tube 54. A conical thickening scraper 56 is installed at the bottom of the pre-sedimentation and concentration tank 52. A sludge return pipe 57 extending to the interior is installed at the bottom of the pre-sedimentation and concentration tank 52. The sludge return pipe is provided with a concentrated sludge pump 58. The output end of the concentrated sludge pump 58 is connected to the inlet installed in the reaction tank 51.

[0064] Preferably, the draft tube 54 divides the reaction tank 51 into two sections, each with different flocculation energies. The flocculation rate within the draft tube 54 is high, and an axial lift impeller stirs the water, which circulates the water within the reaction tank 51. The plug flow formed between the outer wall of the draft tube 54 and the concrete tank wall leads to slow flocculation, ensuring further growth in the volume of the alum flocs and enhanced density.

[0065] The concentration of suspended solid flocs or sediments in the stirring zone is maintained at an optimal level. The sludge concentration is ensured by returning the concentrated sludge from the sludge concentration zone to the reaction tank 51. The reaction tank 51 is able to form large, dense, and uniform flocs.

[0066] Preferably, in the pre-precipitation concentration tank 52, the movement speed of the alum flowers is slowed down when entering the pre-precipitation area with a larger area. This can avoid the rupture of the alum flowers and the formation of vortexes, and also allow most of the suspended solids to settle and concentrate in this area.

[0067] The concentrating zone is equipped with a conical concentrating scraper 56. Sludge is collected in the concentrating zone by gravity or by the conical concentrating scraper 56. The concentrating zone is spatially divided into two levels: one above the conical circulation drum and one below it. The concentrated sludge in the upper portion of the conical circulation drum is pumped out by a concentrating sludge pump 58 and returned to the inlet of the reaction tank 51. The remaining sludge in the lower portion of the conical circulation drum is pumped out from the bottom of the concentrating tank according to the sludge level and discharged into the reaction tank 51.

[0068] Preferably, the inclined plate settling zone in the inclined plate separation tank 53 is used to remove residual alum bloom. The inclined plates are spaced 80 mm apart, ensuring smooth sludge flow without clogging. The inclined plate wall thickness is 1.0 mm, ensuring sufficient mechanical strength and physical properties to prevent accumulated sludge from deforming and sinking under pressure. The flow rate control in the plug flow reaction zone and the arrangement of the water collection trough ensure uniform water distribution in the inclined tube zone, preventing short-circuiting of the water flow and ensuring optimal sedimentation.

[0069] The inclined plates utilize a stainless steel corrugated inclined plate settling device, set at a 60° angle. They offer advantages such as reduced mud accumulation, high strength, no collapse, long service life, and excellent settling performance. The inclined plate area is equipped with an online flushing device and a semi-emptying device, significantly reducing operational burdens. Clarified water from the inclined plate separation zone is collected by a collection tank system. Alum flocs ultimately accumulate in the concentration zone at the bottom of the sedimentation tank, where the resulting sludge is concentrated.

[0070] The sedimentation tank has the following characteristics: strong ability to adapt to changes in influent water quality and quantity, and high treatment efficiency; high efficiency in removing raw water turbidity, suspended matter, algae, etc.; sludge concentration function, high sludge concentration, and its sludge treatment does not require the installation of a sludge concentration tank; even for raw water with low temperature and low turbidity characteristics, satisfactory treatment effects can still be achieved; the overall design is compact and saves space.

[0071] Depend on Figure 3 It is shown that the MBR membrane treatment box 7 includes a pretreatment system, a biochemical treatment system, and an auxiliary system; the pretreatment system is connected to the domestic sewage treatment and discharge unit 15 through a pipeline, and the pretreatment system, biochemical treatment system, and auxiliary system are connected in turn through a pipe pump assembly.

[0072] Preferably, the MBR membrane treatment box 7 adopts a combination of membrane separation technology and activated sludge biological technology. Its efficient solid-liquid separation makes the effluent water quality good, with suspended solids and turbidity close to zero, and the domestic sewage can be directly reused after treatment.

[0073] The pretreatment system includes a pretreatment tank 71 connected to the domestic sewage treatment and discharge unit 15 through a pipeline. The pretreatment tank 71 is connected to a regulating tank 72, and a grille 73 is installed in the regulating tank 72; the biochemical treatment system includes an anoxic tank 74 connected to the regulating tank 72 through a pipe pump assembly, and the anoxic tank 74 is connected to a membrane bioreactor 75; the auxiliary system includes a dosing chemical phosphorus removal and disinfection, and a clear water tank 76. The dosing chemical phosphorus removal and disinfection are installed on the membrane bioreactor 75, and the membrane bioreactor 75 is connected to one side of the clear water tank 76 through a pipe pump assembly.

[0074] Optionally, the membrane bioreactor 75 is also equipped with a liquid level gauge, a differential pressure gauge, a liquid volume meter, etc.; the pipe pump assembly is a pipe and a suction pump for drainage and lifting.

[0075] The membrane bioreactor 75 includes an aerobic aeration tank 751 and a membrane assembly 752 ; the aerobic aeration tank 751 is connected to one side of the anoxic tank 74 , the membrane assembly 752 is immersed in the aerobic aeration tank 751 , and the membrane assembly 752 is connected to the clean water tank 76 through a pipe pump assembly.

[0076] Preferably, the membrane bioreactor 75 is separated from the aerobic aeration tank 751 by a fine grid, and the water in the aerobic aeration tank 751 enters the membrane bioreactor 75 through the fine grid.

[0077] Preferably, the membrane assembly in the membrane bioreactor 75 is immersed in the aerobic aeration zone. Since the tiny pore size of the membrane can prevent bacteria from passing through, all the bacterial flocs and free bacteria are retained in the aeration tank, and only the filtered water is discharged into the water collection pipe, thereby achieving mud and water separation, eliminating the need for a secondary sedimentation tank, and various suspended particles, bacteria, algae, turbidity, COD and organic matter are effectively removed, ensuring excellent effluent water quality with nearly zero suspended matter in the effluent.

[0078] It is different from the activated sludge method. It does not use sedimentation tanks for solid-liquid separation, but uses membranes instead of sedimentation tanks. Therefore, it has high-efficiency solid-liquid separation performance. At the same time, it uses the characteristics of the membrane to prevent the activated sludge from being lost with the effluent, and forms an ultra-high concentration of activated sludge of 8000-12000 mg / L in the biochemical pool, which completely decomposes the pollutants. Therefore, the effluent water quality is good and stable, and the effluent bacteria, suspended solids and turbidity are close to zero. The domestic sewage can be directly reused after treatment.

[0079] The preferred membrane bioreactor technology has the following advantages: high effluent quality standards, achieving high-quality effluent from sewage in one step: stable effluent quality, high resistance to shock loads, safe and reliable; good phosphorus and nitrogen removal effects, high treatment efficiency; fewer structures can eliminate the need for secondary sedimentation tanks and deep treatment processes, small footprint, and low total construction cost.

[0080] The beneficial effects obtained by the first wastewater aggregation unit 1, the second wastewater aggregation unit 2, the wastewater regulating tank 3, the online detector 4, the sedimentation tank 5, the water plant front end, and the MBR membrane treatment box 7 are as follows: the water plant production tail water treatment system after transformation and optimization of the utility model adopts a two-way tail water treatment route, and the water plant production wastewater line enters the wastewater regulating tank 3 uniformly, undergoes turbidity treatment through integrated sedimentation, and after treatment, the water is returned to the front end of the water plant, and an online detector 4 is added to the outlet end of the drainage; the domestic sewage station treatment and discharge unit 15 treats COD, ammonia nitrogen, total nitrogen, total phosphorus and other indicators through the MBR membrane treatment box 7, and the water meets the discharge standards after treatment, and is used for water plant greening and fruit tree irrigation, thereby realizing tail water recycling.

[0081] When the utility model is in use: the backwash water 11 of the V-type filter, the mud water 12 of the coagulation sedimentation tank, the backwash water 13 of the multi-media, the water discharged after neutralization treatment in the neutralization tank 14, the enhanced backwash fast flushing discharge 21 of the first-stage ultrafiltration, the forward washing water 22 of the second-stage V-type filter, the backwash discharge 23 of the first-stage ultrafiltration, and the backwash water 24 of the first-stage laminated filter are all lifted and discharged to the wastewater regulating tank 3, and then enter the wastewater regulating tank 3, and then are lifted to the front end of the water plant through the drainage tank 8 for utilization.

[0082] The domestic sewage treatment and discharge unit 15 enters the MBR membrane treatment box 7 for purification, and the treated water can be used for greening and watering fruit trees.

[0083] It can be understood that the above embodiments only express the preferred implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can be made, all of which fall within the scope of protection of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should fall within the scope of coverage of the claims of the present invention.

Claims

1. A production tail water treatment system, characterized in that: It includes a first wastewater aggregation unit (1) for aggregating drinking water treatment, a second wastewater aggregation unit (2) for aggregating production wastewater treatment, and a domestic sewage station treatment and discharge unit (15) for treating domestic wastewater; A wastewater regulating tank (3), the wastewater regulating tank (3) being connected to the first wastewater aggregation unit (1) and the second wastewater aggregation unit (2), and being used for conditioning and treating domestic drinking water and domestic wastewater; An online detector (4), the online detector (4) being installed between the first wastewater aggregation unit (1) and the wastewater regulating tank (3); The sedimentation tank (5) is connected to and receives the drinking water and domestic wastewater after conditioning treatment in the wastewater regulating tank (3), and the sedimentation tank (5) performs coagulation, flocculation, inclined plate clarification, sludge sedimentation and concentration treatment on the conditioned drinking water and domestic wastewater before lifting them to the front end of the water plant; An MBR membrane treatment box (7) is connected to the domestic sewage treatment and discharge unit (15) of the domestic sewage station, and the MBR membrane treatment box (7) purifies domestic wastewater.

2. A production tail water treatment system according to claim 1, characterized in that: The first wastewater aggregation unit (1) comprises V-type filter backwash water (11), coagulation sedimentation tank sludge water (12), multi-media backwash water (13), and neutralization treatment water (14) of the neutralization tank, which are respectively connected to the wastewater regulating tank (3) through pipelines; The online detector (4) is installed on the pipeline between the wastewater (14) after neutralization treatment in the neutralization tank and the wastewater regulating tank (3).

3. A production tail water treatment system according to claim 1, characterized in that: The second wastewater aggregation unit (2) comprises a first-stage ultrafiltration enhanced backwash fast flush discharge (21), a second-stage V-type filter forward wash drainage (22), a first-stage ultrafiltration water backwash discharge (23), and a first-stage laminated filter backwash water (24), which are connected to the wastewater regulating tank (3) through pipelines.

4. A production tail water treatment system according to claim 1, characterized in that: The production tail water treatment system further comprises a drainage tank (8) connected between the sedimentation tank (5) and the front end of the water plant, and a detection instrument (81) is installed on the pipeline between the drainage tank (8) and the front end of the water plant.

5. A production tail water treatment system according to claim 1, characterized in that: The bottom of the sedimentation tank (5) is also connected to a sludge balancing tank (9), and the MBR membrane treatment box (7) is connected to the sludge balancing tank (9) through a pipeline. A dewatering machine (91) is connected to one side of the sludge balancing tank (9), and a mud hopper (92) is connected to one side of the dewatering machine (91).

6. A production tail water treatment system according to claim 1, characterized in that: The sedimentation tank (5) includes a reaction tank (51) connected to the wastewater regulating tank (3) through a pipeline, a pre-precipitation and concentration tank (52) is connected to one side of the reaction tank (51), and an inclined plate separation tank (53) is connected to the top of the pre-precipitation and concentration tank (52).

7. A production tailwater treatment system according to claim 6, characterized in that: The sedimentation tank (5) further comprises a draft tube (54) installed in the reaction tank (51); the reaction tank (51) is equipped with a flocculation stirrer (55), and the flocculation stirrer (55) is located in the draft tube (54); A conical thickening scraper (56) is installed at the bottom of the pre-sedimentation and concentration tank (52), and a sludge return pipe (57) extending to the interior is installed at the bottom of the pre-sedimentation and concentration tank (52). The sludge return pipe is provided with a thickening sludge pump (58), and the output end of the thickening sludge pump (58) is connected to the inlet of the reaction tank (51).

8. The production tail water treatment system according to claim 1, characterized in that: The MBR membrane treatment box (7) includes a pretreatment system, a biochemical treatment system, and an auxiliary system; The pretreatment system is connected to the domestic sewage treatment and discharge unit (15) through a pipeline, and the pretreatment system, biochemical treatment system and auxiliary system are connected in sequence through a pipe pump assembly.

9. A production tail water treatment system according to claim 8, characterized in that: The pretreatment system comprises a pretreatment tank (71) connected to the domestic sewage treatment and discharge unit (15) via a pipeline, the pretreatment tank (71) is connected to a regulating tank (72), and a grille (73) is installed in the regulating tank (72); The biochemical treatment system comprises an anoxic tank (74) connected to the regulating tank (72) via a pipe pump assembly, and the anoxic tank (74) is connected to a membrane bioreactor (75); The auxiliary system includes a dosing chemical dephosphorization and disinfection system and a clear water tank (76). The dosing chemical dephosphorization and disinfection system is installed on the membrane bioreactor (75). The membrane bioreactor (75) is connected to one side of the clear water tank (76) through a pipe pump assembly.

10. A production tail water treatment system according to claim 9, characterized in that: The membrane bioreactor (75) includes an aerobic aeration tank (751) and a membrane assembly (752); The aerobic aeration tank (751) is connected to one side of the anoxic tank (74), the membrane assembly (752) is immersed in the aerobic aeration tank (751), and the membrane assembly (752) is connected to the clean water tank (76) through a tube pump assembly.

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