RU2038313C1 - Equipment for treatment of sewage resulting from car washing - Google Patents

Abstract

FIELD: treatment of sewage. SUBSTANCE: equipment has a washing platform, sedimentation tanks ( first and second phase), oil trap, a set of filters with filtering charge, oil products collector, tank for purified liquid. First phase sedimentation tank is provided with metal protection grate and device for trapping floating trash. The oil trap is made in the form of a receiving chamber with stream damper and outlet chute, and two upward parallel equal diameter pipes connected with one another in their lower part. One of the pipes is connected with the receiving chamber, the other with the second phase sedimentation tank by a by bypass pipe. The water receiving chamber has a heater in the form of a bottle. EFFECT: higher efficient, cheaper, more compact. 3 cl, 1 dwg

Description

 The invention relates to a device for the separation of oil, water, solids and can be used in any industry, for example in agriculture for wastewater treatment from washing all types of machines and mechanisms.

A known installation for treating wastewater from a car wash, comprising a washing rack, a filter unit with a filter load, a water intake chamber, an oil collection tank, a sump [1]
The disadvantages of this installation are the low degree of purification, the complexity of the design and operation.

Closest to the invention in terms of technical nature and the achieved result is a machine for wastewater treatment from washing machines, containing a washing rack, a dirt trap (settler of stage I), an oil trap with a flotation chamber and a flotation chamber, a clarified liquid chamber (settler of stage II), a filter unit with a filtering loading-water intake chamber for purified liquid, a tank for collecting oil products, a device for removing floating and settling substances [2]
The disadvantages of this installation are cumbersome, design complexity, insufficient degree of purification, high capital costs.

 The purpose of the invention is to increase the degree of water purification, simplifying the design and reducing capital costs.

 The goal is achieved by the fact that in the installation for wastewater treatment from washing machines containing a washing rack, a sump of steps I and II, an oil separator, a filter unit with a filter load, a water intake chamber for purified liquid, a tank for collecting oil products, a sump of stage I is equipped with a removable a metal grill and a device for trapping floating substances installed in front of the overflow pipe. The oil trap is made in the form of two pipes of equal diameters, arranged in parallel and vertically oriented in space, connected to each other in the lower part with the possibility of preserving the cross section, while the receiving chamber of the oil trap is equipped with an incident jet damper, a bypass tray installed at the same level with the outlet pipe. The water intake chamber is equipped with a device for heating water and is made in the form of a thermos bottle, with a container-type sand-graphite filter with a foam cassette installed in front of the latter. In addition, the receiving chamber is made in the form of a cone, a device for detaining the surfaced substances in the form of a grid, and for washing the precipitating mechanical impurities, the oil trap is equipped with an additional pipe.

 The drawing shows a diagram of the proposed installation.

 Installation for wastewater treatment from washing machines contains a washing rack 1, a settling tank 2 of the first stage with a removable metal grill 3 to prevent the ingress of suspended solids and objects and a device 4 for trapping floating substances installed in front of the bypass pipe 5. The oil trap 6 is made in the form of two pipes equal diameters located parallel and oriented vertically in space, interconnected in the lower part with the possibility of preserving the cross section. The receiving chamber 7 of the oil trap 6 is equipped with a damper 8 of the falling jet, a bypass tray 9, installed at the same level with the bypass pipe 10, and the lower part of the chamber is made in the form of a truncated cone. For washing the precipitating mechanical impurities, the oil trap 6 is equipped with an additional pipe 11. In the pit 12 of the oil trap 6, a tank 13 for collecting oil products is installed.

 The installation has a second stage sump 14, a block filter 15, in which a sand-gravel mixture is used as a filter load, and a foam cartridge 16 (both of container type) installed in front of the water intake chamber 17 made in the form of a thermos bottle equipped with a device for washing solution heating 18.

 Installation works as follows.

 Waste water after washing the cars flows from the surface of the washing rack 1 into the settler 2 of stage I, where large mechanical particles are deposited and the floating substances are retained by means of a device 4 installed in front of the bypass pipe 5 on the way to the oil trap 6. Thus purified water with oil products and suspended by mechanical impurities enters the oil trap 6, where the liquid is divided into two fractions: oil products, water with mechanical impurities. Due to the difference in the weights of oil products and water in the receiving chamber 7 of the oil trap 6, their separation occurs. Through the bypass tray 9 from the receiving chamber 7, oil products are discharged into the tank 13 installed in the pit 12 of the oil trap.

 In order to increase the cleaning of the detergent composition from oil products, the intake chamber 7 is initially filled with a “starting dose” of used transmission oil, for example, TAP-15V, TPS-14, in the layer of which the incident jet is quenched by means of an absorber 8.

 The geometrical parameters of the oil trap (height, pipe diameter) depend on the performance of the washing installation, and to ensure reliable operation these parameters must be such that the rate of fluid outflow in the oil trap is greater than the sedimentation rate of mechanical impurities, otherwise flooding will occur. At the end of washing or before starting, it is recommended to pass through a pipe 11 for 3-4 s a stream of clean water from the pressure head of the washing machine in order to "wash" settled mechanical impurities.

 Through the drain pipe 10 of the oil separator 10, water with mechanical impurities flows into the settler 14 of stage II, where the sedimentation of mechanical impurities occurs. The final cleaning takes place in a sand and gravel filter 15 with a foam cartridge 16 (both of a container type), and only after that the water enters the intake chamber 17, which is made in the form of a thermos bottle with the possibility of heating the washing solution to the required temperature using a special device, for example electric heaters.

 Removal of surfaced substances, mechanical impurities, the contents of the block filter is carried out using an excavator once every 3-4 months.

 Using the proposed installation for wastewater treatment from washing machines has the following advantages. The degree of purification is improved by supplying the oil trap with the damper of the incident jet and performing it in the form of two pipes of equal diameters, parallel and vertically oriented in space, interconnected in the lower part with the possibility of preserving the cross section. The quality separation of oil from water is sufficiently ensured. When testing the prototype, the separation quality was so high that after the oil trap in the washing solution there were practically no traces of oil products.

 In addition, this embodiment of the oil trap greatly simplifies the design as a whole.

 A device for trapping floating substances, a pipe for washing the oil trap increases its reliability. The use of a block filter with a sand-gravel mixture and a container-type foam cartridge improve the quality of cleaning and reduce the maintenance costs of the installation itself.

 Providing thermal insulation of the intake chamber by performing it in the form of a thermos bottle and supplying a device for heating water, reduce the duration of washing machines while improving the quality of washing.

 Placing the elements and structures of the installation at different levels allows wastewater treatment from washing machines and mechanisms without the cost of energy for pumping.

 Depending on the conditions of the enterprises and its technical capabilities, the stage I sump, oil sump pit, stage II sump can be made of sheet material or concrete, which will provide a significant reduction in costs.

 The installation is compact, economical, does not pollute the environment, and reduces the overall cost of the cleaning process.

 The use of a closed-type sink with reverse water supply allows to increase labor productivity, reduce water consumption due to its repeated use.

Claims (4)

 1. INSTALLATION FOR CLEANING WASTE WATER FROM A WASHING MACHINE, containing a washing rack, sedimentation tanks of I and II stages, an oil separator, a filter unit with a filter load located in front of the intake chamber for purified liquid, a tank for collecting oil products, characterized in that the first stage sedimentation tank is equipped a protective removable metal grill and a device for trapping pop-up substances installed before the flow outlet, the oil trap is made in the form of a receiving chamber with a flow quencher and a by-pass tray and two vertical parallel pipes of equal diameter, interconnected in the lower part with preserving the cross-section, one of the oil trap pipes in the upper part is connected to the receiving chamber, and the other is a discharge pipe with a stage II settler located at the same level with the discharge chute of the receiving chamber, the water intake chamber is equipped with a device for heating water, it is made in the form of a thermos flask; in this case, a sand and gravel load placed in the container is used as the filter load in the first filter along the stream, and in the second oic cassette.  2. Installation according to claim 1, characterized in that the device for delaying pop-up substances is made, for example, in the form of a grid.  3. Installation according to claim 1, characterized in that the receiving chamber is made in the form of a cone.  4. Installation according to claim 1, characterized in that the oil trap is equipped with a wash water supply pipe.

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