CN111517415A - Car washing wastewater filtering and recycling equipment and application method thereof - Google Patents

Abstract

The invention relates to an automobile wastewater filtering and recycling device, which comprises a water tank, a water supply pump, a filtering device, a water production pump, a high-level water tank and an aeration device, and is characterized in that: the water tank passes through the waste water inlet tube and links to each other with the waste water collecting pit, the working shaft is located the pipeline of waste water inlet tube, filter equipment installs the inside at the water tank, filter equipment includes the end plate, well core rod, filtering diaphragm and locking plate, filter equipment passes through the reuse water connecting pipe and is connected with the high flush tank that is located the water tank top, produce the water pump and be located the pipeline of reuse water connecting pipe, aeration equipment includes fan and aeration pipe, the aeration pipe is located filter equipment's below. The equipment adopts a vertical distribution mode to reduce the floor area of the equipment, simultaneously removes oil molecules and other pollutants in the wastewater through a unique filter membrane design, reduces the membrane pollution of the filter device by utilizing the aeration device, improves the anti-pollution capacity of the equipment through an automatic back washing design, and reduces the cleaning frequency and the operation cost of the equipment.

Description

Car washing wastewater filtering and recycling equipment and application method thereof

Technical Field

The invention relates to the technical field of sewage treatment, in particular to a car washing wastewater filtering and recycling device and an application method thereof.

Background

With the rapid development of the automobile industry in China, the water for washing the automobile is also rapidly increased, a large amount of purified water is usually consumed in the automobile washing process, most of the automobile washing plants usually directly discharge the generated automobile washing wastewater into a sewage pipeline, and only a small part of the automobile washing plants can carry out advanced treatment or recycling on the wastewater. Generally, the price of water used in the car washing industry is about ten times that of common water, the water occupies a great proportion in the car washing cost, and along with the continuous implementation of national environmental protection policies, the water also has a stricter standard for pollution discharge in the car washing industry, so that the recycling of the car washing wastewater is hoped to achieve the purposes of saving the cost and reducing pollution discharge.

The existing technologies for treating and recycling car washing wastewater mainly comprise three types of treatment by a precipitation method, membrane method and biological and chemical oxidation methods, wherein the precipitation method has the defects of large occupied area of equipment, poor treatment effect and the like, cannot remove small-volume solid particles, is easy to damage car washing nozzles and cannot completely remove oil stains in water, for example, in a patent with application publication date of 2018, 10 and 9 and application publication number of CN108619788A, a car washing wastewater recycling system is disclosed, and comprises a diversion area, an initial filtering area and a sedimentation tank, and although the car washing wastewater is fully filtered by arranging three filtering devices made of different materials, the recycling system still does not solve the problem of overlarge occupied area of the equipment; the biological and chemical oxidation method has larger occupied area, high operating cost and inconvenient management; although the membrane method has small occupied area and good treatment effect, the prior art still has the problems of serious membrane pollution, inconvenient use caused by frequent cleaning, high equipment cost, high operating cost and the like caused by low treatment capacity of unit membrane area.

Therefore, the existing membrane treatment technology is hoped to be improved, and a novel membrane treatment wastewater recycling device is designed to meet the requirements of good water purification effect, strong pollution resistance, convenient use, low operating cost and the like.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide the environment-friendly equipment for recycling the car washing wastewater, which has the advantages of small occupied area, good filtering effect, strong pollution resistance, convenient use and low operation cost, and the application method of the equipment.

The technical scheme adopted by the invention for solving the problems is as follows: this carwash waste water filters retrieval and utilization equipment, including water tank, working shaft, filter equipment, product water pump, head tank and aeration equipment, its characterized in that: the utility model discloses a high-order water tank, including water tank, working pump, filter equipment, aeration equipment, water supply pump, water tank, water production pump, water tank, control panel, water tank, water supply pump, waste water collecting tank, water tank, filter equipment, water tank, aeration equipment, fan and aeration pipe, the water tank is the square metal case of upper shed, and the control panel is installed to the upside of water tank, the working pump passes through the support mounting in the outside of water tank, and the working pump is connected with the waste water inlet pipe, the initiating terminal and the waste water collecting tank of waste water inlet pipe are linked together, and the end of waste water inlet pipe lets in the inside of water tank, and filter equipment's one end is connected with the reuse water connecting pipe, the reuse water connecting pipe links to each other with high-order. The water tank is the place that carries out the waste water filtration, the washing waste water passes through the geosyncline and converges back in the waste water collecting tank, get into the water tank through the waste water inlet tube under the effect of water supply pump and filter, the water tank takes the upper shed structure and both is convenient for observe the filtration condition in real time, the routine maintenance of the water tank of also being convenient for, high flush tank installs the top at the water tank, with the area that reduces equipment, also make when producing water pump stop work, hydroenergy in the high flush tank automatic backward flow carries out the back flush in filter equipment under no exogenic action. The filter device adopts a highly hydrophilic anti-oil pollution membrane, the membrane aperture is in the ultrafiltration and microfiltration level, the aperture distribution is uniform, the operation pressure is low, and the water yield per unit membrane area is large. Filter equipment links to each other with producing the water pump, when producing the water pump during operation, the inside atmospheric pressure of filter equipment is less than outside atmospheric pressure, play acceleration effect to waste water filtering process, the water purification that obtains after filter equipment filters collects in flowing into the high flush tank along reuse water connecting pipe, unnecessary water purification flows out from the overflow mouth of high flush tank side and supplies the carwash again to use, aeration equipment is used for carrying out aeration treatment to the waste water in the water tank, air is bloated into to the aeration pipe through the fan, the aperture effusion of air on from the aeration pipe forms fine and close bubble, make the waste water in the whole water tank be in abundant aeration state, can effectively reduce filter equipment's membrane pollution.

Preferably, the bottom of the water tank of the invention is provided with a sewage discharge pipe, and the sewage discharge pipe is provided with a sewage discharge pump or a sewage discharge valve. After a period of filtration, the pollutant in the waste water is gradually deposited at the bottom of the water tank, and the high-concentration sewage at the bottom of the water tank can be discharged by opening the sewage discharge valve of the sewage discharge pump on the sewage discharge pipe, so that the influence on the filtering effect of the waste water due to overhigh pollutant concentration is avoided.

Preferably, the filtering device comprises an end plate, a central rod, filtering membranes and locking plates, wherein the filtering membranes are fixed on the central rod in a close-packed manner through the locking plates to form a membrane stack, the end plate is installed at two ends of the central rod, one end of the central rod is sealed, and the other end of the central rod is connected with a recycled water connecting pipe. After the filter membrane is fixed on the center rod, the inside of the filter membrane and the inside of the center rod can realize the free circulation of water purification: during the filtering process, the filtered pure water flows into the central rod from the filtering membrane and then flows into the high-level water tank; during the back washing process, the clean water flows into the filtering membrane from the central rod to swell the membranes and enable the adjacent membranes to rub against each other, so that the pollutants attached to the surfaces and in the holes of the filtering membranes are washed away. The locking plate sets up to filter equipment provides reasonable wide runner of intaking, and the end plate at well core rod both ends plays the supporting role, makes the membrane stack form relative sealed space, helps improving the aeration effect, and the filter membrane piece can be changed alone to dismantle convenient quick, filter equipment's length can be according to the nimble adjustment in use place.

Preferably, the filter membrane is made of flexible materials, the inner layer of the filter membrane is a non-woven fabric layer, and the outer layer of the filter membrane is a functional layer. The filtering membrane made of flexible materials is contracted in a filtering stage and expanded in a backwashing stage, the functional layer can filter bacteria, oil stains, solid particles and partial surfactant in wastewater, and the functional layer is made of highly hydrophilic materials, so that oil pollutants can form spherical agglomerates on the surface of the membrane, and the cleaning difficulty of the filtering membrane is reduced.

Preferably, the water supply pump, the water production pump and the sewage pump or the sewage valve of the invention are controlled by the control panel. The preset program realizes the timing opening and closing of each pump, and improves the automation degree of the equipment.

Preferably, the control panel is provided with a flow monitoring module, a vacuum degree monitoring module and a control module. Can carry out all-round regulation and control to equipment through the control panel, utilize flow monitoring module and vacuum monitoring module on the control panel can judge filtration membrane's pollution degree to can adjust the washing scheme in a flexible way.

Preferably, the tail end of the waste water inlet pipe is provided with a liquid level controller. The liquid level controller is used for controlling the liquid level in the water tank to realize automatic water feeding and water replenishing stopping.

An application method of a car washing wastewater filtering and recycling device is characterized in that: the method comprises the steps that carwash wastewater collected by a wastewater collection tank is pumped into a water tank by a water supply pump, the liquid level is automatically controlled by a liquid level controller, after the wastewater completely submerges a filtering device, a water production pump and a fan are started, negative pressure is formed inside a filtering membrane by the suction force of the water production pump, purified water filtered by the membrane is sucked into a membrane, the purified water flows into a high-level water tank along a central rod and a backwater connecting pipe, meanwhile, the fan blows air into an aeration pipe, the wastewater in the water tank is in an aeration state, the attachment of pollutants on the filtering membrane is reduced, and redundant purified water in the high-level water tank flows out through an overflow port; after the water pump is operated for a period of time, the water pump is automatically closed, the purified water in the high-level water tank automatically flows back to the filtering device to carry out backwashing on the filtering membrane, the pollutants on the surface of the membrane are loosened, and meanwhile, the pollutants on the surface and in the holes of the filtering membrane are washed away by utilizing the mutual friction between the filtering membrane and the adjacent membrane after the filtering membrane is swelled, so that the backwashing process is completed; setting timed sewage discharge according to the actual operation condition or the concentration of pollutants in the sewage, generally discharging the sewage once for more than 24 hours, discharging the high-concentration sewage through a sewage discharge pipe and a sewage discharge pump or a sewage discharge valve, and then repeating the process; and the filtering device is thoroughly cleaned by adopting a chemical cleaning method every 2-3 months to ensure the wastewater treatment effect.

Compared with the prior art, the invention has the following advantages and effects:

(1) the equipment of the invention adopts a vertical distribution mode on the whole, thereby greatly reducing the occupied area of the equipment and facilitating the installation and placement of the equipment.

(2) The filtering membrane used by the invention can simultaneously remove oil molecules and other pollutants in the car washing wastewater, and the filtering membrane is made of highly hydrophilic materials, so that the oil pollutants can form spherical agglomerates on the surface of the membrane, the cleaning difficulty and the cleaning frequency of the filtering membrane are reduced, and the filtering membrane is particularly suitable for treating the oily wastewater.

(3) The invention utilizes the aeration device to make the wastewater in the water tank in an aeration state during filtering so as to reduce the membrane pollution of the filtering device, and utilizes the backwashing stage after filtering to flush the filtering device, thereby obviously improving the anti-pollution capability of the filtering device, reducing the cleaning frequency, having no need of external force in the backwashing process, and leading the running cost of the equipment to be lower because the pure water used for flushing is filtered pure water.

Drawings

In order to illustrate the embodiments of the present invention or the solutions in the prior art more clearly, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive effort.

Fig. 1 is a schematic front view of an embodiment of the present invention.

Fig. 2 is a schematic top view of a filter device according to an embodiment of the present invention.

Fig. 3 is a schematic top view of an aeration apparatus according to an embodiment of the present invention.

Fig. 4 is a schematic diagram of the relative positions of the filtering means and the aeration means according to the embodiment of the present invention.

Description of reference numerals: 1. a water tank; 2. a water supply pump; 3. a filtration device; 4. a water production pump; 5. a high-level water tank; 6. an aeration device; 7. a control panel; 8. a wastewater inlet pipe; 9. a wastewater collection tank; 10. a reuse water connecting pipe; 11. a water inlet; 12. an overflow port; 13. a fan; 14. an aeration pipe; 15. a sewage discharge pipe; 16. a dredge pump or a dredge valve; 17. an end plate; 18. a center pole; 19. a filter membrane; 20. a locking plate; 21. a liquid level controller.

The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.

Examples are given.

Referring to fig. 1 to 4, the car washing wastewater filtering and recycling device according to the embodiment of the present invention includes a water tank 1, a water supply pump 2, a filtering device 3, a water production pump 4, a high-level water tank 5, and an aeration device 6.

The water tank 1 of this embodiment is the square case of upper shed, and water tank 1 is the place of carrying out waste water filtration, and water tank 1 takes upper shed structure both to be convenient for observe the filtration condition in real time, also is convenient for the routine maintenance of water tank. Control panel 7 is installed to the upside of water tank 1, is equipped with flow monitoring module, vacuum monitoring module and control module on the control panel 7, can carry out all-round regulation and control to equipment through control panel 7.

The feed pump 2 of this embodiment passes through the upside of support mounting at water tank 1, feed pump 2 is connected with waste water inlet tube 8, waste water in waste water inlet tube 8's the initiating terminal and the waste water collecting pit 9 is linked together, the end lets in the inside of water tank 1, car washing waste water converges into waste water collecting pit 9 back through the geosyncline, let in the inside of water tank 1 through waste water inlet tube 8 under the effect of feed pump 2, liquid level controller 21 is installed to waste water inlet tube 8's end, a liquid level for in the control water tank 1, realize the automation of equipment and intake.

The inside at water tank 1 is installed to filter equipment 3 of this embodiment, filter equipment 3 includes end plate 17, well core rod 18, filtering diaphragm 19 and locking plate 20, wherein, filtering diaphragm 19 is fixed through locking plate 20 thick row and is formed the membrane stack on well core rod 18, make filtering diaphragm 19's inside and well core rod's inside can realize the free circulation of water purification, locking plate 20 sets up to filter equipment 3 and provides reasonable wide runner of intaking, end plate 17 installs the both ends at well core rod 18, mainly play the supporting role, and make the membrane stack form the space of relative seal, help improving the aeration effect, well core rod 18's one end is sealed, the other end is connected with reuse water connecting pipe 10.

The filtering membrane 19 of this embodiment is made of flexible material, the inner layer of the filtering membrane 19 is a non-woven fabric layer, the outer layer is a functional layer, the filtering membrane 19 made of flexible material can absorb and contract in the filtering stage, and swell in the backwashing stage, the functional layer can filter bacteria, oil stains, solid particulate matters and partial surfactant in the wastewater, the functional layer is made of highly hydrophilic material, so that oil pollutants can form spherical agglomerates on the membrane surface, and the cleaning difficulty of the filtering membrane can be effectively reduced. The filter membrane 19 of this embodiment can be changed alone to dismantle convenient quick, filter membrane 19's quantity and interval also can be according to the nimble adjustment in use place.

The filtering device 3 of the embodiment is communicated with a bottom water inlet 11 of a high-level water tank 5 arranged above the water tank 1 through a reuse water connecting pipe 10, the high-level water tank 5 is arranged at a high position, which is not only beneficial to reducing the floor area of equipment, but also can utilize gravitational potential energy to enable water in the high-level water tank 5 to automatically flow back into the filtering device 3 for backwashing without external force, and an overflow port 12 is arranged at the high position of the side surface of the high-level water tank 5, so that redundant filtered water can flow out from the overflow port 12 for reuse. The pipeline of the reuse water connecting pipe 10 is also provided with a water producing pump 4, the water producing pump 4 is arranged at the upper side of the water tank 1, when the water producing pump 4 works, the air pressure inside the filtering device 3 is smaller than the external air pressure, the wastewater is promoted to permeate into the filtering membrane 19, the wastewater filtering efficiency is improved, the filtered purified water can flow into the high-level water tank 5 from bottom to top along the reuse water connecting pipe 10 to be collected, when the water producing pump 4 stops working, the purified water in the high-level water tank 5 automatically flows back to back flush the filtering device 3, the purified water flows into the filtering membrane 19 from the center rod 18 from top to bottom along the reuse water connecting pipe 10, the filtering membrane 19 is cleaned, the membranes are also bulged after the purified water flows into the filtering membrane 19, the adjacent membranes rub with each other to promote the shedding of pollutants on the surfaces of the membranes and in the holes, and the back flushing process generally lasts. Each water pump is controlled by the control panel, and the interval and the time length of filtering and back flushing can be flexibly adjusted through a preset program, so that the automation degree of equipment is improved.

The aeration device 6 of this embodiment includes fan 13 and aeration pipe 14, fan 13 is installed in the side of water tank 1, aeration pipe 14 is installed in the inside of water tank 1 and is located the below of filter equipment 3, it has a plurality of apertures to process on the pipe wall of aeration pipe 14, aeration device 6 is used for carrying out aeration treatment to the waste water in water tank 1 at the filtration stage, air is blown into aeration pipe 14 through fan 13, the aperture of control follow aeration pipe 14 escapes and forms fine and close bubble, make the waste water in whole water tank 1 be in abundant aeration state, can effectively reduce filter equipment 3's membrane pollution.

The equipment of this embodiment filters the back through a period of time, and the bottom of water tank 1 can deposit certain pollutant, and consequently, this embodiment still is connected with sewage discharge pipe 15 in the bottom of water tank 1, installs dredge pump or blowoff valve 16 on the sewage discharge pipe 15, through sewage discharge pipe 15 regularly with the high concentration sewage discharge of water tank 1 bottom, avoids influencing the filter effect of waste water because of pollutant concentration is too high.

The pollution degree of the filtering device 3 can be judged through the flow monitoring module and the vacuum degree monitoring module on the control panel 7, when the pollution degree is high, the back washing effect is limited, so that the filtering device 3 needs to be thoroughly cleaned by adopting a chemical cleaning method to ensure the wastewater treatment effect, and the chemical cleaning is usually performed once every 2-3 months.

The application method of the car washing wastewater filtering and recycling device comprises the following specific contents: the car washing wastewater collected by the wastewater collection tank 9 is pumped into the water tank 1 by using the water supply pump 2, the liquid level is automatically controlled by the liquid level controller 21, after the wastewater completely submerges the filter device 3, the water production pump 4 and the fan 13 are started, the interior of the filter membrane 19 forms negative pressure and the purified water filtered by the membrane is sucked into the membrane by the suction force of the water production pump 4, the purified water flows into the high-level water tank 5 along the central rod 18 and the backwater connecting pipe 10, meanwhile, the fan 13 blows air into the aeration pipe 14, so that the wastewater in the water tank 1 is in an aeration state, the adhesion of pollutants on the filter membrane 19 is reduced, and the redundant purified water in the high-level water tank 5 flows out through the overflow port 12; after the operation is carried out for a period of time, the water production pump 4 is automatically closed, the purified water in the high-level water tank 5 automatically flows back to the filtering device 3 to carry out backwashing on the filtering membrane 19, the pollutants on the surface of the membrane are loosened, and meanwhile, the pollutants on the surface and in the holes of the filtering membrane 19 are washed away by utilizing the mutual friction between the filtering membrane 19 and the adjacent membranes after being swelled, so that the backwashing process is completed; setting timed sewage discharge according to the actual operation condition or the concentration of pollutants in the sewage, generally discharging the sewage for more than 24 hours, discharging the high-concentration sewage through a sewage discharge pipe 15 and a sewage discharge pump or a sewage discharge valve 16, and then repeating the process; the filtering device 3 is thoroughly cleaned by adopting a chemical cleaning method every 2-3 months to ensure the wastewater treatment effect.

In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above description is only an illustration of the structure of the present invention. Equivalent or simple changes in the structure, characteristics and principles of the invention are included in the protection scope of the patent. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.

Claims (8)

1. The utility model provides a carwash waste water filters retrieval and utilization equipment, includes water tank (1), working shaft (2), filter equipment (3), produces water pump (4), high flush tank (5) and aeration equipment (6), its characterized in that: the water tank (1) is a square metal tank with an upper opening, a control panel (7) is installed on the upper side of the water tank (1), a water supply pump (2) is installed on the outer side of the water tank (1) through a support, the water supply pump (2) is connected with a wastewater inlet pipe (8), the starting end of the wastewater inlet pipe (8) is communicated with a wastewater collecting tank (9), the tail end of the wastewater inlet pipe (8) is led into the water tank (1), a filtering device (3) is installed inside the water tank (1), one end of the filtering device (3) is connected with a reuse water connecting pipe (10), the reuse water connecting pipe (10) is connected with a bottom water inlet (11) of the high-level water tank (5), a water production pump (4) is located on a pipeline of the reuse water connecting pipe (9), an overflow port (12) is arranged at the high position of the side face of the high-level water tank (5), and an aeration device (6) comprises, the fan (13) is arranged on the outer side of the water tank (1), the aeration pipe (14) is arranged in the water tank (1) and is positioned below the filtering device (3), and a plurality of small holes are processed on the pipe wall of the aeration pipe (14).

2. The car washing wastewater filtering and recycling device according to claim 1, characterized in that: the bottom of the water tank (1) is provided with a sewage discharge pipe (15), and a sewage discharge pump or a sewage discharge valve (16) is arranged on the sewage discharge pipe (15).

3. The car washing wastewater filtering and recycling device according to claim 1, characterized in that: filter equipment (3) are including end plate (17), well core rod (18), filtering diaphragm (19) and locking plate (20), filtering diaphragm (19) are fixed through locking plate (20) close packing and are formed the membrane heap on well core rod (18), the both ends at well core rod (18) are installed in end plate (17), and the one end of well core rod (18) is sealed, and the other end is connected with reuse water connecting pipe (10).

4. The car washing wastewater filtering and recycling device according to claim 3, characterized in that: the filtering membrane (19) is made of flexible materials, the inner layer of the filtering membrane (19) is a non-woven fabric layer, and the outer layer of the filtering membrane is a functional layer.

5. The car washing wastewater filtering and recycling device according to claim 1, characterized in that: the water supply pump (2), the water production pump (4) and the sewage pump or the sewage valve (16) are controlled by the control panel (7).

6. The car washing wastewater filtering and recycling device according to claim 1, characterized in that: and the control panel (7) is provided with a flow monitoring module, a vacuum degree monitoring module and a control module.

7. The car washing wastewater filtering and recycling device according to claim 1, characterized in that: and a liquid level controller (21) is arranged at the tail end of the wastewater inlet pipe (8).

8. The application method of the car washing wastewater filtering and recycling device according to any one of claims 1 to 7, characterized in that: the method comprises the steps that carwash wastewater collected by a wastewater collection tank (9) is pumped into a water tank (1) by a water supply pump (2), the liquid level is automatically controlled by a liquid level controller (21), when the wastewater completely submerges a filtering device (3), a water production pump (4) and a fan (13) are started, the interior of a filtering membrane (19) forms negative pressure and purified water filtered by the membrane is sucked into the membrane by the suction force of the water production pump (4), the purified water flows into a high-level water tank (5) along a central rod (18) and a connecting pipe (10) for water return, and meanwhile, the fan (13) blows air into an aeration pipe (14), so that the wastewater in the water tank (1) is in an aeration state, the attachment of pollutants on the filtering membrane (19) is reduced, and redundant purified water in the high-level water tank (5) flows out through an overflow port (12); after the water pump (4) is operated for a period of time, the purified water in the high-level water tank (5) automatically flows back to the filtering device (3) to backwash the filtering membrane (19), the pollutants on the surface of the membrane are loosened, and meanwhile, the pollutants on the surface and in the holes of the filtering membrane (19) are washed away by utilizing the mutual friction between the swelled filtering membrane (19) and the adjacent membrane, so that the backwashing process is completed; setting timed sewage discharge according to the actual operation condition or the concentration of pollutants in the sewage, generally discharging the sewage once more than 24 hours, discharging the high-concentration sewage through a sewage discharge pipe (15) and a sewage discharge pump or a sewage discharge valve (16), and then repeating the process; the filtering device (3) is thoroughly cleaned by adopting a chemical cleaning method every 2-3 months to ensure the wastewater treatment effect.

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