CN108928947B - Car washing wastewater treatment and recycling device - Google Patents
Car washing wastewater treatment and recycling device Download PDFInfo
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- CN108928947B CN108928947B CN201810984293.XA CN201810984293A CN108928947B CN 108928947 B CN108928947 B CN 108928947B CN 201810984293 A CN201810984293 A CN 201810984293A CN 108928947 B CN108928947 B CN 108928947B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/02—Forward flushing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/04—Backflushing
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/44—Nature of the water, waste water, sewage or sludge to be treated from vehicle washing facilities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/007—Modular design
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention relates to a device for treating and recycling car washing wastewater, belongs to the field of drainage engineering and water treatment, and particularly relates to car washing wastewater treatment equipment. Mainly comprises a sand-settling well, a primary sedimentation tank, a secondary sedimentation tank, an ultrafiltration unit, a water purifying tank and a car washing pump. Under the operating condition, after the car washing wastewater enters the treatment device, the three-stage precipitation, rough filtration, fine filtration and nano ultrafiltration are carried out, so that not only can the muddy sand and tiny particles in the water be removed, but also bacteria, car washing medicines and detergents can be removed, the discharged water is stored in a water purifying pond, the car washing wastewater can be repeatedly utilized, only a small amount of water quantity which is evaporated and lost is needed, the car washing wastewater is repeatedly utilized for treatment, water is saved, and the car washing cost is reduced. The sedimentation and filtration unit can be washed, the filtration effect of the equipment is improved, and the operation working condition and the washing working condition are controlled by the PLC.
Description
Technical Field
The invention relates to a device for treating and recycling car washing wastewater, belongs to the field of drainage engineering and water treatment, and particularly relates to car washing wastewater treatment equipment.
Background
Along with the development of society and the improvement of resident living standard, the automobile has an increased quantity, the automobile washing industry is rapidly developed, the consumption of water resources is larger and larger, and most of the wastewater in a plurality of car washing sites is directly discharged into municipal drainage pipe networks, so that the pressure of wastewater treatment of the municipal pipe networks is increased. At present, most vehicles are washed by tap water, a large amount of tap water is consumed, the price of the tap water is high, and the water cost of a car washing plant is high. The water price of the carwash is much higher than that of the resident water, and the water price of many cities is tense, so that the cost control of the carwash with large water consumption is very unfavorable. Urban water is increasingly stressed, tap water is consumed in a large amount to flush vehicles, and the requirements of sustainable development are not met. The recycling treatment of the car washing wastewater can relieve the water supply pressure of cities, lighten the pressure of wastewater treatment, bring long-term economic benefits to car washing sites and make some due contributions to environmental protection and energy conservation.
Disclosure of Invention
The purpose of the invention is that: the device mainly comprises a sand sedimentation well, a primary sedimentation tank, a secondary sedimentation tank, an ultrafiltration unit, a clean water tank and a carwash pump, wherein the carwash wastewater enters the treatment device and is subjected to three-stage precipitation, rough filtration, fine filtration and nano ultrafiltration, so that not only can silt and tiny particles in water be removed, but also bacteria, carwash drugs and detergents can be removed, and the carwash wastewater can be repeatedly utilized and only a small amount of water is needed for supplementing the water quantity which is evaporated and lost. The beneficial effects are that: the car washing wastewater is treated and recycled, so that the water is saved, and the car washing cost is reduced.
The invention is realized by the following technology: the device for treating and recycling the car washing wastewater mainly comprises a sand sedimentation well 1, a primary sedimentation tank 2, a secondary sedimentation tank 3, an ultrafiltration unit 4, a clean water tank 5 and a car washing pump 6, wherein the primary sedimentation tank 2, the secondary sedimentation tank 3 and the ultrafiltration unit 4 are combined into a whole and are arranged underground, the clean water tank 5 and the car washing pump 6 are arranged on the ground, the sand sedimentation well 1 is connected with the primary sedimentation tank 2 through pipelines, the primary sedimentation tank 2 and the secondary sedimentation tank 3 are communicated pools, the primary sedimentation tank 2 and the secondary sedimentation tank 3 are separated by a rough filter screen 7, a spiral fine filter pipe 8 is arranged in the secondary sedimentation tank 3, the head and the tail of the fine filter pipe 8 are respectively connected with two ends of a water collecting tee 9, a branch port of the water collecting tee 9 is connected with the ultrafiltration unit 4, the ultrafiltration unit 4 is provided with an ultrafiltration pump 10 and an ultrafilter 11, and a water outlet of the ultrafilter 11 is connected with the clean water tank 5; the car washing wastewater flows into the sand-settling well 1 through a ground water-collecting trench, sand with larger particles is precipitated, water flows into the primary sedimentation tank 2 through a pipeline, small-particle muddy sand carried by the wastewater passes through the coarse screen 7, the small-particle muddy sand is filtered out and precipitated in the primary sedimentation tank 2, the wastewater and suspended matters enter the secondary sedimentation tank 3, the water flows into the pipe through the fine filter pipe 8 of the secondary sedimentation tank 3, and the suspended matters are adhered to the outside of the pipe of the fine filter pipe 8 or are precipitated to the bottom of the secondary sedimentation tank 3; the water in the fine filter pipe 8 is connected with an ultrafiltration pump 10 through a water collecting tee joint 9, and under the pressure of the ultrafiltration pump 10, the water is subjected to nano ultrafiltration of an ultrafilter 11, so that tiny impurities in the water are removed, and the water flows into a clean water tank 5; the device for treating and recycling the car washing wastewater has two working conditions of operation and flushing, under the working conditions of operation, the ultrafiltration pump 10 is started to treat the wastewater, and the car washing pump 6 is started to flush the vehicle; under the flushing working condition, the water flow direction is converted through the electromagnetic valve, and the ultrafiltration pump 10 and the carwash pump 6 are adopted to flush the fine filter pipe 8 and the ultrafilter 11 and flush the bottoms of the primary sedimentation tank 2 and the secondary sedimentation tank 3.
The bottom of the primary sedimentation tank 2 is in a downhill shape from one side of the coarse filter screen 7 to the opposite direction of water flow, and forms a three-side slope funnel shape together with two vertical sides of the coarse filter screen 7, an emptying port 12 is arranged at the bottom of the funnel and is connected with a drain pipe 14 through an electric emptying valve 13, the drain pipe 14 is connected with a municipal drain pipe, an overflow port 15 is arranged at the upper part of the primary sedimentation tank 2, and when the primary sedimentation tank 2 is full of water, waste water is discharged to the drain pipe 14 through the overflow port 15 and an overflow pipe 16.
The upper end of the coarse filter screen 7 is inclined to one side of the primary sedimentation tank 2, the inclined angle is 5-15 degrees, and small-particle silt filtered by the coarse filter screen 7 is not easy to accumulate in the coarse filter screen 7, but falls into the bottom of the primary sedimentation tank 2.
The fine filter pipe 8 in the secondary sedimentation tank 3 is a soft permeable pipe with the diameter of 50-100 mm, the bottom of the secondary sedimentation tank 3 is sloped and slopes to the primary sedimentation tank 2, the bottom of the secondary sedimentation tank, which is close to one end of the ultrafiltration unit 4, is provided with a flushing port 17, and the water flow of flushing water faces the primary sedimentation tank 2.
The ultrafiltration unit 4 consists of an ultrafiltration pump 10, a check valve 18, an ultrafilter 11, a water inlet three-way valve 19, a water outlet three-way valve 20, a waste water valve 21, a flushing three-way valve 22 and matched pipelines, wherein the inlet of the water inlet three-way valve 19 is connected with the branch port end of the water collecting three-way valve 9, the outlet of the water inlet three-way valve 19 is connected with the ultrafiltration pump 10, the check valve 18 is arranged between the ultrafiltration pump 10 and the ultrafilter 11, the outlet of the check valve 18 is connected with the ultrafilter water inlet 23 of the ultrafilter 11, the ultrafilter water outlet 24 of the ultrafilter 11 is connected with the clean water tank 5 through the water outlet three-way valve 20, and the ultrafilter waste water port 25 of the ultrafilter 11 is connected with the pipeline of the flushing port 17 of the secondary sedimentation tank 3.
The ultrafilter 11 is internally provided with an ultrafiltration membrane consisting of a wire tube bundle with the diameter of 1-2 mm, micropores with the aperture of 0.01-0.1 micron are densely distributed on the wire tube wall, namely 10-100 nanometers, one end of the wire tube bundle is connected with an ultrafilter water inlet 23, the other end is connected with an ultrafilter waste water port 25, and the outer side of the wire tube bundle is connected with an ultrafilter water outlet 24.
The upper portion of the clean water tank 5 is provided with a clean water tank water inlet pipe 26 and a clean water tank water supplementing pipe 27, the clean water tank water supplementing pipe 27 is connected with a running water pipe by adopting a water supplementing valve 28, a car washing pump water intake 29 is arranged on the side surface of the bottom of the clean water tank 5, a liquid level meter 30 is arranged in the clean water tank 5, and a water supplementing water level, an ultrafiltration pump starting water level and an ultrafiltration pump stopping water level are arranged.
The inlet of the car washing pump 6 is connected with the water intake 29 of the car washing pump, the outlet is connected with the inlet of the working condition switching three-way valve 31, the straight-through port of the working condition switching three-way valve 31 is connected with the car washing water outlet 32, and the branch port of the working condition switching three-way valve 31 is connected with the flushing three-way valve 22 of the ultrafiltration unit 4.
The flushing working conditions are divided into three modes: in the first mode, the ultrafilter 11 is positively flushed by using the water in the secondary sedimentation tank 3 and adopting the ultrafiltration pump 10; the second mode uses the water in the clean water tank 5 and adopts the car washing pump 6 to back flush the ultrafilter 11; in the third mode, the water in the clean water tank 5 is utilized, and the fine filter pipe 8 is washed by the car washing pump 6; the effluent of the mode one and mode two flushing ultrafiltration pumps 10 is sprayed out from the flushing port 17 to flush sediment at the bottom of the secondary sedimentation tank 3.
The invention adopts the technologies of precipitation, rough filtration, fine filtration and nano ultrafiltration to remove the muddy sand and suspended matters of the car washing wastewater, and the water quality is clear and transparent after nano ultrafiltration, and the ultrafiltration can remove the particulate impurities such as bacteria, medicines and the like, and the water quality meets the car washing water standard. The water level, operation and flushing conditions of the clean water tank 5 are controlled by a PLC controller.
Drawings
FIG. 1 is a plan view of the present invention;
FIG. 2 is an elevation view of the present invention;
FIG. 3 is a schematic illustration of operating condition water flow;
FIG. 4 is a schematic diagram of the water flow of the flushing condition positive flush ultrafilter;
FIG. 5 is a schematic illustration of the water flow of a backflushing ultrafilter during flushing conditions;
FIG. 6 is a schematic illustration of the water flow for flushing the fine filter tube during a flushing operation.
In the figure: 1-sand sedimentation well, 2-primary sedimentation tank, 3-secondary sedimentation tank, 4-ultrafiltration unit, 5-clean water tank, 6-car wash pump, 7-coarse screen, 8-fine filter tube, 9-catchment tee bend, 10-ultrafiltration pump, 11-ultrafilter, 12-evacuation port, 13-electric evacuation valve, 14-drain pipe, 15-overflow port, 16-overflow pipe, 17-flushing port, 18-check valve, 19-water inlet three-way valve, 20-water outlet three-way valve, 21-waste water valve, 22-flushing three-way valve, 23-ultrafilter water inlet, 24-ultrafilter water outlet, 25-ultrafilter waste water port, 26-clean water tank water inlet pipe, 27-clean water tank water supplementing pipe, 28-water supplementing valve, 29-car wash pump intake, 30-level gauge, 31-operating mode switching three-way valve, 32-car wash water outlet.
Description of the embodiments
For a better understanding of the present invention, reference should be made to the accompanying drawings, which are incorporated herein by reference, for the purpose of illustrating the invention in a better understanding of the present invention, and not to the limitation of the present invention.
The invention relates to a carwash wastewater treatment and recycling device which mainly comprises a sand-settling well 1, a primary sedimentation tank 2, a secondary sedimentation tank 3, an ultrafiltration unit 4, a clean water tank 5 and a carwash pump 6. The primary sedimentation tank 2, the secondary sedimentation tank 3 and the ultrafiltration unit 4 are combined into a whole, and are made of stainless steel plates and are arranged underground, the clean water tank 5 and the car washing pump 6 are arranged on the ground, the clean water tank 5 is made of the stainless steel plates, the plan view is shown in fig. 1, and the elevation view is shown in fig. 2. The sand-settling well 1 is built by bricks, a sand-settling tank with the depth of 0.5-1 meter is arranged at the bottom of the sand-settling well 1, the upstream of the sand-settling well 1 is connected with a trench of a car washing field, car washing wastewater flows into the sand-settling well 1 through a ground water-collecting trench, sand with larger particles is deposited in the sand-settling tank, and the downstream of the sand-settling well 1 is connected with the primary sedimentation tank 2 by a pipeline. The primary sedimentation tank 2 and the secondary sedimentation tank 3 are communicated water tanks, the primary sedimentation tank 2 and the secondary sedimentation tank 3 are separated by a rough filter screen 7, the rough filter screen 7 is made of a stainless steel screen, and the diameter of the mesh is 0.5-2 mm. The upper end of the coarse filter screen 7 is inclined to one side of the primary sedimentation tank 2, the inclined angle is 5-15 degrees, and small-particle muddy sand filtered by the coarse filter screen 7 is not easy to accumulate on the coarse filter screen 7, but falls into the bottom of the primary sedimentation tank 2. The bottom of the primary sedimentation tank 2 is in a downhill shape from one side of the rough filter screen 7 to the opposite direction of water flow, and forms a three-side slope funnel shape together with two vertical sides of the rough filter screen 7, an emptying port 12 is arranged at the bottom of the funnel, the bottom of the funnel is connected with a drainage pipe 14 through an electric emptying valve 13, the drainage pipe 14 is connected with a municipal drainage pipe, an overflow port 15 is arranged at the upper part of the primary sedimentation tank 2, and when the primary sedimentation tank 2 is full of water, waste water is discharged to the drainage pipe 14 through the overflow port 15 by an overflow pipe 16. The secondary sedimentation tank 3 is internally provided with a spiral fine filter pipe 8, the head and the tail of the fine filter pipe 8 are respectively connected with the two ends of a catchment tee 9, and the branch port of the catchment tee 9 is connected with the ultrafiltration unit 4. The fine filter pipe 8 is a soft permeable pipe with the diameter of 50-100 mm, the bottom of the secondary sedimentation tank 3 is sloped to the primary sedimentation tank 2, a flushing port 17 is arranged at the bottom of one end of the bottom, close to the ultrafiltration unit 4, of the tank, and flushing water flows to the primary sedimentation tank 2. Under the flushing working condition, the water sprayed out of the flushing port 17 can flush the mud and sand precipitated at the bottoms of the secondary sedimentation tank 3 and the primary sedimentation tank 2 to the emptying port 12.
Leading from the branch port end of a catchment tee 9 connected end to end of a fine filter pipe 8 of the secondary sedimentation tank 3 to the ultrafiltration unit 4. The ultrafiltration unit 4 consists of an ultrafiltration pump 10, a check valve 18, an ultrafilter 11, a water inlet three-way valve 19, a water outlet three-way valve 20, a waste water valve 21, a flushing three-way valve 22 and matched pipelines. The ultrafilter 11 is internally provided with an ultrafiltration membrane consisting of a wire bundle with the diameter of 1-2 mm, micropores with the aperture of 0.01-0.1 micron are densely distributed on the wall of the wire bundle, namely 10-100 nanometers, one end of the wire bundle is connected with an ultrafilter water inlet 23, the other end of the wire bundle is connected with an ultrafilter waste water port 25, and the outer side of the wire bundle is connected with an ultrafilter water outlet 24. The inlet a of the water inlet three-way valve 19 is connected with the branch port end of the water collecting three-way valve 9, the outlet b of the water inlet three-way valve 19 is connected with the ultrafiltration pump 10, a check valve 18 is arranged between the ultrafiltration pump 10 and the ultrafilter 11, the outlet of the check valve 18 is connected with the ultrafilter water inlet 23 of the ultrafilter 11, the ultrafilter water outlet 24 of the ultrafilter 11 is connected with the clean water tank 5 through the water outlet three-way valve 20, the ultrafilter waste water port 25 of the ultrafilter 11 is connected with the pipeline of the flushing port 17 of the secondary sedimentation tank 3, impurities, bacteria, medicines and the like in water are filtered out through nano ultrafiltration of the ultrafilter 11, and the water quality completely meets the requirements of vehicle washing water.
The upper portion of the clean water tank 5 is provided with a clean water tank water inlet pipe 26 and a clean water tank water supplementing pipe 27, the clean water tank water supplementing pipe 27 is connected with a running water pipe by adopting a water supplementing valve 28, a car washing pump water intake 29 is arranged on the side surface of the bottom of the clean water tank 5, a liquid level meter 30 is arranged in the clean water tank 5, and a water supplementing water level, an ultrafiltration pump starting water level and an ultrafiltration pump stopping water level are arranged.
The inlet of the car washing pump 6 is connected with the car washing pump water intake 29, the outlet is connected with the inlet of the working condition switching three-way valve 31, the straight-through port of the working condition switching three-way valve 31 is connected with the car washing water outlet 32, and the branch port of the working condition switching three-way valve 31 is connected with the flushing three-way valve 22 of the ultrafiltration unit 4.
The waste water valve 21 and the water supplementing valve 28 adopt electromagnetic valves, the water inlet three-way valve 19, the water outlet three-way valve 20, the flushing three-way valve 22 and the working condition switching three-way valve 31 adopt electric three-way valves, and all connecting pipelines adopt stainless steel pipes.
The invention adopts the technologies of precipitation, rough filtration, fine filtration and ultrafiltration to remove the muddy sand and suspended matters of the car washing wastewater, and the water quality is clear and transparent after nano ultrafiltration, and the ultrafiltration can remove the particulate impurities such as bacteria, medicines and the like, and the water quality meets the car washing water standard. The water level, operation and flushing conditions of the clean water tank 5 are controlled by a PLC controller.
The invention has two working conditions of operation and flushing, under the working conditions of operation, the car washing pump 6 is started to flush the car, and the car washing wastewater is stored in the clean water tank 5 for recycling after being treated by the treatment and recycling device. Under the flushing working condition, the car washing pump 6 is started to flush the fine filter pipe 8 and the ultrafilter 11 and flush the bottoms of the primary sedimentation tank 2 and the secondary sedimentation tank 3 through the conversion of the water flow direction of the electromagnetic valve.
Under the operation working condition, the electric evacuation valve 13 and the waste water valve 21 are closed, and the water inlet three-way valve 19, the water outlet three-way valve 20, the flushing three-way valve 22 and the working condition switching three-way valve 31 are in a straight-through state, namely, the ports a-b are communicated. In the initial state, when the clean water tank 5 is not filled with water, the water supply valve 28 is opened to supply water into the clean water tank 5. Starting a car washing pump 6 to wash the car, enabling car washing wastewater to flow into a sand-settling well 1 through a ground water-collecting trench, enabling larger-particle sand to precipitate, enabling water to flow into a primary sedimentation tank 2 through a pipeline, enabling the wastewater to entrain small-particle silt to pass through a coarse screen 7, enabling the small-particle silt to be filtered out and precipitate in the primary sedimentation tank 2, enabling the wastewater and suspended matters to enter a secondary sedimentation tank 3, enabling the water to flow into the pipe through a fine filter pipe 8 of the secondary sedimentation tank 3, and enabling the suspended matters to adhere outside the pipe 8 or to sink to the bottom of the secondary sedimentation tank 3. The water flow diagram of the operation condition is shown in fig. 3, water in the fine filter pipe 8 is connected with an inlet a and an inlet a-b of a water inlet three-way valve 19 through a water collecting three-way valve 9 and communicated, an outlet b of the water inlet three-way valve 19 is connected with an ultrafiltration pump 10, the minimum protection liquid level control of the ultrafiltration pump is arranged in the secondary sedimentation tank 3, and in fig. 2, the ultrafiltration pump 10 can be started only when the water level of the secondary sedimentation tank 3 exceeds the minimum protection liquid level of the ultrafiltration pump. The car washing pump 6 continuously pumps water in the clean water tank 5, when the water level of the clean water tank 5 is lower than the ultrafiltration pump-on water level, the ultrafiltration pump 10 is automatically started, under the pressure of the ultrafiltration pump 10, the water is connected with the ultrafilter water inlet 23 of the ultrafilter 11 through the check valve 18, the water is filtered by the ultrafilter 11, tiny impurities in the water are removed, the ultrafilter water outlet 24 of the ultrafilter 11 is connected with the inlet a, a-b of the water outlet three-way valve 20, the inlet a is communicated, the inlet a is connected with the clean water tank water inlet pipe 26 of the clean water tank 5 through a pipeline, and when the water level reaches the ultrafiltration pump-off water level, the ultrafiltration pump 10 is stopped. When the treated water flow is small and the water consumption for rain washing is lower than the water-replenishing-opening water level, the water-replenishing valve 28 automatically opens the water-replenishing from the water supply pipe.
After a period of operation, the bottoms of the primary sedimentation tank 2 and the secondary sedimentation tank 3 are settled with some silt, and the silt needs to be washed. Under the flushing working condition, three modes are divided: in the first mode, the ultrafilter 11 is positively flushed, that is, water is fed from the ultrafilter water inlet 23 of the ultrafilter 11 and water is discharged from the ultrafilter water outlet 25, so that particles adhered to the inner wall of the ultrafilter membrane tube of the ultrafilter 11 are flushed. Mode one flushing schematic is shown in fig. 4. In the first mode, the ultrafilter 11 is flushed by the ultrafiltration pump 10 by using water in the secondary sedimentation tank 3, the water inlet three-way valve 19 is in a straight-through state, the ports a-b are communicated, the water outlet three-way valve 20 and the flushing three-way valve 22 are in a bypass state, the ports a-c are communicated, and the waste water valve 21 is opened. The ultrafiltration pump 10 is started, water in the secondary sedimentation tank 3 flows into the ultrafiltration pump 10 through the fine filter pipe 8, the water collecting tee joint 9 and the water inlet tee joint valve 19, and enters the ultrafilter 11 from the ultrafilter water inlet 23 through the check valve 18, the water outlet tee joint valve 20 is in a bypass state, the port a-c is communicated, the water flows from the port a-c to the port b of the flushing tee joint valve 22, the flushing tee joint valve 22 is also in a bypass state, the port a-c is communicated, the port b is closed, the water can only be discharged from the ultrafilter waste water port 25, the waste water valve 21 is in an open state, the water flows into a pipeline connected with the flushing port 17, the water carrying the particles is sprayed out from the flushing port 17, and sediment at the bottom of the secondary sedimentation tank 3 is flushed at the same time when the ultrafilter 11 is flushed.
In the second mode, the ultrafilter 11 is backflushed, namely, water is fed from an ultrafilter water outlet 24 of the ultrafilter 11 and water is discharged from an ultrafilter waste water outlet 25, and particles embedded in micropores of an ultrafilter membrane tube of the ultrafilter 11 are flushed out. The mode two flushing schematic diagram is shown in fig. 5. The second mode uses the water in the clean water tank 5, the ultra-filter 11 is flushed by adopting the car washing pump 6, the working condition switching three-way valve 31 is in a bypass state, the ports a-c are communicated, the flushing three-way valve 22 is in a straight-through state, the ports a-b are communicated, the water outlet three-way valve 20 is in a bypass state, the ports a-c are communicated, and the waste water valve 21 is opened. The car washing pump 6 is started, water flows into the ultrafilter 11 from the ultrafilter water outlet 24 through the working condition switching three-way valve 31, the flushing three-way valve 22 and the water outlet three-way valve 20, water fills the tank of the ultrafilter 11, flows into the pipe from the outer wall of the ultrafilter pipe, particles embedded in micropores of the ultrafilter pipe are flushed out, due to the non-return effect of the check valve 18, water can only be discharged from the ultrafilter waste water port 25, the waste water valve 21 is in an opened state, flows into a pipeline connected with the flushing port 17, water is sprayed out from the flushing port 17, and sediment at the bottom of the secondary sedimentation tank 3 is flushed while the ultrafilter 11 is flushed.
Mode three, the fine filter tube 8 is flushed. The flushing water is flushed outwards from the interior of the fine filter tube 8, fine particles adhered to the outer wall of the fine filter tube 8 are flushed out, and a mode three flushing schematic diagram is shown in fig. 6. The third mode uses the water in the clean water tank 5, the fine filter pipe 8 is washed by the car washing pump 6, the working condition switching three-way valve 31, the washing three-way valve 22 and the water inlet three-way valve 19 are all in bypass states, and the ports a-c are communicated. And starting the car washing pump 6, enabling water flow to the water collecting tee joint 9 through the ports a-c of the three-way valves, and then shunting to two sides to enter the fine filter pipe 8, wherein fine particles adhered to the outer wall of the fine filter pipe 8 are separated under the action of water pressure, and are precipitated to the bottom of the secondary sedimentation tank 3.
The flushing time of each flushing mode is 15-30 seconds, and can be set by a PLC controller. The bottom of the secondary sedimentation tank 3 is inclined to the primary sedimentation tank 2, three sides of the bottom of the primary sedimentation tank 2 are inclined to the emptying port 12 in a funnel shape, and deposited silt is flushed to the bottom of the funnel. The mode two and the mode three adopt water flushing of a clean water tank 5, water flows from a secondary sedimentation tank 3 to a primary sedimentation tank 2, impurities embedded into holes of a coarse filter screen 7 are flushed out, and when the flushing water level exceeds the upper part of the primary sedimentation tank 2, an overflow port 15 is arranged, and the water is discharged to a drain pipe 14 through the overflow port 15 and an overflow pipe 16. When more silt is deposited at the bottom of the primary sedimentation tank 2, the electric emptying valve 13 is manually operated, and the silt is discharged through the emptying port 12 together with water.
The water level control of the operation working condition and the mode conversion of the flushing working condition are automatically controlled by a program programmed by the PLC, and the working condition and the mode conversion can be selected only by operating a button and a switch of the control panel. The controller is provided with a manual water supplementing switch, and water can be supplemented in any state according to the requirement.
Claims (8)
1. A car washing wastewater treatment and recycling device is characterized in that: the device mainly comprises a sand sedimentation well (1), a primary sedimentation tank (2), a secondary sedimentation tank (3), an ultrafiltration unit (4), a clear water tank (5) and a carwash pump (6), wherein the primary sedimentation tank (2), the secondary sedimentation tank (3) and the ultrafiltration unit (4) are combined into a whole and are arranged underground, the clear water tank (5) and the carwash pump (6) are arranged on the ground, the sand sedimentation well (1) is connected with the primary sedimentation tank (2) through pipelines, the primary sedimentation tank (2) and the secondary sedimentation tank (3) are communicated water tanks, the primary sedimentation tank (2) and the secondary sedimentation tank (3) are separated by a rough filter screen (7), the upper end of the rough filter screen (7) is inclined to one side of the primary sedimentation tank (2) by an inclined angle of 5-15 degrees; a spiral fine filter pipe (8) is arranged in the secondary sedimentation tank (3), the fine filter pipe (8) is a soft permeable pipe with the diameter of 50-100 mm, the head and the tail of the fine filter pipe (8) are respectively connected with two ends of a water collecting tee joint (9), a branch port of the water collecting tee joint (9) is connected with an ultrafiltration unit (4), the ultrafiltration unit (4) is provided with an ultrafiltration pump (10) and an ultrafilter (11), and a water outlet of the ultrafilter (11) is connected with the water purifying tank (5);
the car washing wastewater flows into a sand-settling well (1) through a ground water-collecting trench, sand and stone with larger particles are precipitated, water flows into a primary sedimentation tank (2) through a pipeline, small-particle silt sand carried by the wastewater passes through a coarse screen (7), the small-particle silt sand is filtered out and precipitated in the primary sedimentation tank (2), the wastewater and suspended matters enter a secondary sedimentation tank (3), the water flows into the pipe through a fine filter pipe (8) of the secondary sedimentation tank (3), and the suspended matters are adhered outside the pipe of the fine filter pipe (8) or are settled to the bottom of the secondary sedimentation tank (3); the water in the fine filter pipe (8) is connected with an ultrafiltration pump (10) through a water collecting tee joint (9), and under the pressure of the ultrafiltration pump (10), the water is subjected to nano ultrafiltration of an ultrafilter (11), so that tiny impurities in the water are removed, and the water flows into a clean water tank (5);
the car washing wastewater treatment and recycling device has two working conditions of operation and flushing, under the working conditions of operation, the ultrafiltration pump (10) is started to treat wastewater, and the car washing pump (6) is started to flush a car; under the flushing working condition, the water flow direction is converted through the electromagnetic valve, and an ultrafiltration pump (10) and a car washing pump (6) are adopted to flush the fine filter tube (8) and the ultrafilter (11) and flush the bottoms of the primary sedimentation tank (2) and the secondary sedimentation tank (3).
2. The apparatus for treating and recycling car washing wastewater according to claim 1, characterized in that: the bottom of the primary sedimentation tank (2) is in a downhill shape from the side of the coarse filter screen (7) to the side of the reverse direction of water flow, the two vertical sides of the coarse filter screen (7) form a three-side slope funnel shape together, an emptying port (12) is arranged at the bottom of the funnel, the bottom of the funnel is connected with a drain pipe (14) through an electric emptying valve (13), the drain pipe (14) is connected with a municipal drain pipe, an overflow port (15) is arranged at the upper part of the primary sedimentation tank (2), and when the primary sedimentation tank (2) is full of water, waste water is discharged to the drain pipe (14) through the overflow pipe (16) by the overflow port (15).
3. The apparatus for treating and recycling car washing wastewater according to claim 1, characterized in that: the bottom of the secondary sedimentation tank (3) is in a slope shape and is inclined to the primary sedimentation tank (2), a flushing port (17) is arranged at the bottom of one end of the tank bottom, which is close to the ultrafiltration unit (4), and the water flow of flushing water faces the primary sedimentation tank (2).
4. The apparatus for treating and recycling car washing wastewater according to claim 1, characterized in that: the ultrafiltration unit (4) constitute by ultrafiltration pump (10), check valve (18), ultrafilter (11) and water inlet three-way valve (19), water outlet three-way valve (20), waste water valve (21), wash three-way valve (22) and supporting pipeline, the entry of water inlet three-way valve (19) connects the branch mouth end of catchment three-way (9), the export of water inlet three-way valve (19) connects ultrafiltration pump (10), set up check valve (18) between ultrafiltration pump (10) and ultrafilter (11), the export of check valve (18) connects ultrafilter water inlet (23) of ultrafilter (11), ultrafilter delivery port (24) of ultrafilter (11) connect clear water tank (5) through water outlet three-way valve (20), ultrafilter waste water mouth (25) of ultrafilter (11) connect the pipeline of two flushing ports (17) of sedimentation tank (3).
5. The apparatus for treating and recycling car washing wastewater according to claim 1, characterized in that: the ultrafiltration membrane is formed by a wire tube bundle with the diameter of 1-2 mm, micropores with the aperture of 0.01-0.1 micron are densely distributed on the wall of the wire tube, one end of the wire tube bundle is connected with an ultrafilter water inlet (23), the other end of the wire tube bundle is connected with an ultrafilter waste water port (25), and the outer side of the wire tube bundle is connected with an ultrafilter water outlet (24).
6. The apparatus for treating and recycling car washing wastewater according to claim 1, characterized in that: the upper portion of the water purifying tank (5) is provided with a water purifying tank water inlet pipe (26) and a water purifying tank water supplementing pipe (27), the water purifying tank water supplementing pipe (27) is connected with a running water pipe by adopting a water supplementing valve (28), a car washing pump water intake (29) is arranged on the side surface of the bottom of the water purifying tank (5), a water level sensor is arranged in the water purifying tank (5), and a water supplementing water level, an ultrafiltration pump starting water level and an ultrafiltration pump stopping water level are arranged.
7. The apparatus for treating and recycling car washing wastewater according to claim 1, characterized in that: the inlet of the car washing pump (6) is connected with the water intake (29) of the car washing pump, the outlet is connected with the inlet of the working condition switching three-way valve (31), the straight-through port of the working condition switching three-way valve (31) is connected with the car washing water outlet (32), and the branch port of the working condition switching three-way valve (31) is connected with the flushing three-way valve (22) of the ultrafiltration unit (4).
8. The apparatus for treating and recycling car washing wastewater according to claim 1, characterized in that: the flushing working conditions are divided into three modes: firstly, utilizing water in a secondary sedimentation tank (3) to positively flush an ultrafilter (11) by adopting an ultrafiltration pump (10); the second mode uses the water in the clean water tank (5) and adopts the car washing pump (6) to back flush the ultrafilter (11); the third mode uses the water of the clean water tank (5) to wash the fine filter tube (8) by adopting the car washing pump (6); the water discharged from the ultrafiltration pump (10) is sprayed out from a flushing port (17) in the first mode and the second mode to flush sediment at the bottom of the secondary sedimentation tank (3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810984293.XA CN108928947B (en) | 2018-08-28 | 2018-08-28 | Car washing wastewater treatment and recycling device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810984293.XA CN108928947B (en) | 2018-08-28 | 2018-08-28 | Car washing wastewater treatment and recycling device |
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| CN108928947A CN108928947A (en) | 2018-12-04 |
| CN108928947B true CN108928947B (en) | 2023-09-15 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1245780A (en) * | 1999-06-24 | 2000-03-01 | 朱德权 | Fuelling station car-washed sewage treatment and cyclic utilization system |
| CN1400175A (en) * | 2001-08-02 | 2003-03-05 | 王树功 | Urban organic sewage treatment process |
| CN2873766Y (en) * | 2005-12-08 | 2007-02-28 | 上海交通大学 | Circulation reusing and treating device for washing car waste water |
| RU2009103243A (en) * | 2009-02-02 | 2010-08-10 | Андрей Олегович Бобылев (RU) | METHOD FOR SEWAGE TREATMENT AND DEVICE FOR ITS IMPLEMENTATION |
| CN103253782A (en) * | 2013-04-23 | 2013-08-21 | 朱加林 | Device for washing car by utilizing rain water and recycling car-washing waste water |
| CN103539278A (en) * | 2013-10-22 | 2014-01-29 | 浙江开创环保科技有限公司 | Crystal grinding wastewater treatment method and crystal grinding wastewater treatment device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050184011A1 (en) * | 2004-02-20 | 2005-08-25 | Fields William M. | Car wash water reclamation system |
-
2018
- 2018-08-28 CN CN201810984293.XA patent/CN108928947B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1245780A (en) * | 1999-06-24 | 2000-03-01 | 朱德权 | Fuelling station car-washed sewage treatment and cyclic utilization system |
| CN1400175A (en) * | 2001-08-02 | 2003-03-05 | 王树功 | Urban organic sewage treatment process |
| CN2873766Y (en) * | 2005-12-08 | 2007-02-28 | 上海交通大学 | Circulation reusing and treating device for washing car waste water |
| RU2009103243A (en) * | 2009-02-02 | 2010-08-10 | Андрей Олегович Бобылев (RU) | METHOD FOR SEWAGE TREATMENT AND DEVICE FOR ITS IMPLEMENTATION |
| CN103253782A (en) * | 2013-04-23 | 2013-08-21 | 朱加林 | Device for washing car by utilizing rain water and recycling car-washing waste water |
| CN103539278A (en) * | 2013-10-22 | 2014-01-29 | 浙江开创环保科技有限公司 | Crystal grinding wastewater treatment method and crystal grinding wastewater treatment device |
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| CN108928947A (en) | 2018-12-04 |
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