RU73326U1 - ROTARY WATER SUPPLY SYSTEM FOR WASHING MOTOR TRANSPORT - Google Patents

Abstract

The reverse water supply system for washing vehicles refers to water systems with a closed cycle of water circulation and can be used for wastewater treatment and reuse in car washes. Achievable technical result consists in increasing the degree of wastewater treatment after washing vehicles, increasing system performance, reducing operating costs, improving the environmental situation. The reverse water supply system for washing vehicles, including a pre-treatment unit, pumps, filters, clean water tanks additionally contains a reagent treatment unit, including devices for dispensing reagents and a contact capacity, a sludge separation unit connected to a pre-treatment unit to return the water separated from the sludge to tertiary treatment and membrane filtration unit for desalination of water. Filters are made in the form of alluvial filters with an automatic cleaning and regeneration system, and the substance for creating the alluvial layer is selected in such a way that water-soluble substances are removed on one of the filters, and water-insoluble substances are removed on the other filter to increase the degree of purification. The system is fully automated. 1 ill.

Description

The utility model relates to closed loop water supply systems and can be used for wastewater treatment and reuse in car washes.

A known installation (Copyright certificate No. 850597 1981, bulletin No. 28 (3) С02F 1/40) for wastewater treatment from car washing, including a washing rack, a filter unit, a water intake chamber arranged in series and an oil collection tank, is provided a prefabricated inclined tray, a dirt trap, a device for removing settling and pop-up substances, consisting of a flotation chamber, a flotation chamber in a thin layer of water and a clarified liquid chamber, and a sludge dewatering unit and connected to gryazelovushkoy, the flotation chambers and the clarified liquid. The disadvantages of the known installation is the bulkiness of the structures, insufficient degree of water purification, high operating costs, low environmental friendliness of the installation in connection with the use of the flotation process.

Closest to the utility model, taken as a prototype, is a system (US Patent NKI 270/765 No. 5,093,012 of 03/03/1992) of recycled water for continuous water treatment previously used for car washing, including a sand filter, a diatomite filter, a carbon filter filter, pumps, clean water tank

The disadvantage of this system is the low degree of water purification, low system performance.

The technical result of the development of the proposed utility model is to increase the degree of wastewater treatment after washing

vehicles, increasing system performance, reducing operating costs, improving the environmental situation.

The technical result is achieved as follows. The reverse water supply system for washing vehicles, including a pre-treatment unit, consisting of a dirty water tank and a sand filter, pumps, filters, clean water tanks is equipped with a reagent treatment unit, including reagent dispensing devices and a contact tank. Reagent dispensing devices include at least one container for a coagulant solution, one container for a flocculant solution and one container for a suspension of a water-insoluble absorber, injectors for supplying solutions and a metering pump for supplying a suspension. The contact container is connected to the first filter, and the water supply pipe to the contact container is located in its upper part, and the water intake pipe from the contact container is located in its lower part, and the filter housing has a pipe for supplying dirty water, a pipe for leaving clean water and a pipe to discharge dirty water during automatic flushing and regeneration. Between the contact container and the first filter, there is a device for dispensing an auxiliary filter substance to form an alluvial filter layer, including a container for a suspension of an auxiliary filter substance and a metering pump for supplying it. The first filter is connected in series with the second filter, and between the filters there is a device for dispensing an auxiliary filter substance to form an alluvial filter layer, including a container for suspension of an auxiliary filter substance and a metering pump for its supply, the auxiliary filter substance for forming an alluvial layer in both filters in In order to increase the degree of water purification, it is selected in such a way that substances soluble in water are removed on one of the filters, and on the other tre removed substance insoluble in water. System optional

equipped with a sludge separation unit connected at the inlet to the filter housing, and at the outlet with a pre-treatment unit to return the water separated from the sludge for further treatment. The sludge separation unit includes a sludge storage tank and a pump for pumping out the separated water. The system is additionally equipped with a membrane filtration unit, which includes a housing with a nanofiltration or reverse osmosis membrane installed inside it and a pump connected to a rinse water tank. The system is additionally equipped with an automatic control unit connected to the reagent dosing devices in the reagent processing unit, a dosing aid for the filter aid and a filter control unit. As a filter, an alluvial filter with an automatic cleaning and regeneration system is used, including a housing and a control unit.

In the drawing, figure 1 is a circuit diagram, where

1 - capacity for dirty water;

2 - pump for supplying dirty water

3 - capacity for coagulant solution

4 - capacity for flocculant solution

5 - capacity for a suspension of water-insoluble absorber

6 - injectors

7 - dosing pumps

8 - contact capacitance

9, 10 - containers for filter aid

11, 12 - alluvial filters with automatic cleaning and regeneration system

13 - capacity for the accumulation of sludge

14 - pump for pumping the separated water

15 - capacity of pure water

16 - diaphragm block pump

17 - case with a membrane

18 - rinse water tank

19 - feed pumps

20 - automatic control unit

The essence of the utility model is as follows. The reverse water supply system for washing vehicles includes a receiving tank for contaminated water with a sand filter inside 1, the selection of water from which is carried out using a pump 2, which supplies dirty water to a closed contact tank 8, and the water supply pipe to the contact tank is located in its upper part. Reagent dosing devices are connected to the pipeline between the pump and the contact tank. The supply of reagents is carried out from tanks for reagents 3, 4, 5, two of which contain solutions of coagulant and flocculant, and the third - a suspension of water-insoluble absorber. The supply of reagents to the pressure line is carried out by injectors 6 for solutions and a metering pump 7 for the suspension. The contact tank is connected by a pipe to the alluvial filter with an automatic cleaning and regeneration system 11, and the pipe for water intake from the contact tank is located in its lower part. A device for dispensing an auxiliary filter medium is connected to the pipeline between the contact container and the first filter, including a metering pump 7 and a container for the suspension 9. The wash filter 11 is connected in series with the spray filter 12, which is identical in design to the filter 11. Between the filters 11 and 12, to the pipeline a device for dispensing an auxiliary filter medium is connected, including a metering pump 7 and a container for suspension 10. The washing filters 11 and 12 consist of a filter housing and a control unit but. The filter housing has three nozzles: for supplying dirty water; for the release of clean water, for the discharge of dirty water during automatic flushing. The clean water pipe of the filter housing 12 is connected to a clean water tank 15, from where water is taken for

car wash. Dirty water discharge pipes during washing of filters 11 and 12 are connected to a sludge accumulator, which includes a container 12 containing bag filters for sludge accumulation. The water separated from the sludge is pumped out of the drive body by a pump 14 connected to a dirty water tank. The pump 16 takes water from a clean water tank and delivers it into the housing 17 with a membrane installed inside it, and the housing has three nozzles: for inlet water, for purified water and for drainage water. Drainage water is returned to the clean water tank 15, while the purified water is supplied to the rinse water tank 18, from where the feed pump 19 selects water for final rinsing of the water during washing. Reagent dispensing devices, auxiliary filtering agent dispensing devices and filter control units are connected by an automatic control unit 20.

The system operates as follows. Waste water enters the pit 1, where preliminary cleaning on the sand layer takes place, then the pump 2 pumps out the contaminated water from the bottom of the pit and feeds it to the preliminary reagent treatment, the main purpose of which is to enlarge the pollution particles. Reagents are fed into the pipeline from tanks 3 and 4 through injectors 6, and the suspension is fed into the pipeline by a metering pump 7 from tank 5. For effective filtration, a particle size of the order of 1-5 microns is required. The formation of particles coarsened to 1-5 μm takes place in the contact tank 8. The contaminated water with the formed particles of the desired size enters the filter with an alluvial layer 11, where the removal of water-insoluble impurities takes place. Water after this filter contains dissolved surfactants and partially oil products. The removal of substances dissolved in water takes place on the filter 12. The wash-up layer in the filters is formed from the auxiliary filter substance, which is supplied from the containers 9 and 10 by means of pumps 7. After the cleaning step,

alluvial filters produce water, which accumulates in the tank 15, from where it is supplied to rinse the cars or, in the case of high mineralization in the winter due to reagent surface treatment of roads, is pumped into the housing with a membrane 17 using a pump 16, and drainage water from the housing returns to the tank 15, and the purified water enters the rinse water tank 18. The supply of clean water and rinse water to the washing equipment is carried out by pumps 19. The regeneration of the filters 11 and 12 occurs simultaneously continuous operation flow of working fluid and waste reagents in the form of wet sludge discharged into the sludge storage tank 13 and the water separated from the sludge pump 14 and pumped back into the tank for the dirty water to final purification. Dried sludge is disposed of for daily maintenance. The regeneration of filters, the dosing of reagents and filter aid is carried out automatically using the automatic control unit 20.

Examples of using the water recycling system for washing vehicles.

Example 1. Produced water purification after washing vehicles. Water was purified at an average rate of 1 cubic meter / h. Aluminum sulfate with a concentration of 100 mg / L was used as a coagulant, and polyacrylamide with a concentration of 5-7 mg / L was used as a flocculant. Expanded perlite was used as an auxiliary filtering substance for the formation of an alluvial layer, and powdered activated carbon of the OU-A grade was used as a water-insoluble absorber.

Samples of source water, water after the first stage of filtration, water after the second stage of filtration were taken. Samples were analyzed for the content of major pollutants. The results are shown in table 1.

Analysis results Indicators Regulatory requirements GN 2.1.5-689-98 Source water After the first cleaning step After the second cleaning step Test methods Surfactant, mg / l 0.1 8 1.8 0.1 PND F 14.1: 2: 4.158-2000 Oil products, mg / l 0.05 620 2.7 0.2 PND F 14.1: 2.5-95 Suspended Substances, mg / L 3 More than 1000 12 0.5 PND F 14.1: 2.110-97. COD, mg / l thirty 500 fifty 16 PND F 14.1: 2.19-95. GN 2.1.5-689-98. MPC of chemicals in the water of water bodies for drinking and cultural and domestic water use
PND F 14.1: 2: 4.158-2000. Methodology for measuring the mass concentration of anionic surfactants in samples of natural, drinking and wastewater.
PND F 14.1: 2.5-95. Methodology for measuring the mass concentration of oil products in samples of drinking, natural and waste water.
PND F 14.1: 2.110-97. Methodology for measuring suspended solids and total impurities in samples of natural and treated wastewater.
PND F 14.1: 2.19-95. Methodology for measuring the mass concentration of chemically consumed oxygen in samples of natural and waste water.

Example 2. Produced additional filtration of purified water according to example 1 through a nanofiltration membrane module brand ERN-96-950. Filtration was carried out at a speed of 200 l / h. In water before and after filtration, the solute content was determined by dry solids. The solids content in the inlet water was 750 mg / l, after filtration through a membrane - 380 mg / l

Claims (6)

1. The reverse water supply system for washing vehicles, including a pre-treatment unit, consisting of a receiving tank for dirty water and a sand filter, pumps, filters, clean water tanks, characterized in that the filters are connected in series, and each filter is made in the form of a pre-filter with an automatic cleaning and regeneration system and includes a housing and a control unit; equipped with a reagent processing unit, including devices for dispensing reagents and contact capacitance; equipped with a sludge separation unit including a sludge storage tank and a pump for pumping water separated from the sludge connected to the pre-treatment unit; equipped with dosing devices for an auxiliary filter substance for the formation of an alluvial layer of filters; equipped with a membrane filtration unit for desalination of purified water, connected to a clean water tank and comprising a housing with a nanofiltration or reverse osmosis membrane installed inside it, a pump and a rinse water tank, the housing being made with three nozzles: for inlet water, for purified water and for drainage water, and the pipe of drainage water is connected to a clean water tank; equipped with an automatic control unit connected to reagent dispensing devices in the reagent processing unit, with dispensing aids for filter aid and control filter units. 2. The system according to claim 1, characterized in that the contact tank has a water supply pipe located in its upper part and a water intake pipe located in its lower part. 3. The system according to claim 1, characterized in that the devices for dispensing reagents include at least one container for coagulant solution, one container for flocculant solution and one container for suspension of a water-insoluble absorber, injectors for supplying solutions and a metering pump for feeding suspensions. 4. The system according to claim 1, characterized in that the filter housing is made with three nozzles: for supplying dirty water, for draining clean water and for dumping dirty water during automatic washing. 5. The system according to claim 1, characterized in that the device for dispensing an auxiliary filter substance for the formation of an alluvial layer of filters include a container for a suspension of an auxiliary filter substance and a metering pump for supplying this suspension. 6. The system according to claim 5, characterized in that the auxiliary filter substance for the formation of an alluvial layer in the filters is selected so that substances soluble in water are removed on one of the filters and substances insoluble in water are removed on the other filter.