SU1386591A1 - Installation for purifying waste water of laundries of synthetic surface-active substances - Google Patents

Abstract

This invention relates to the treatment of laundry wastewater from synthetic surfactants. The purpose of the invention is to improve the quality of the foam concentrate for reuse when washing laundry and dewatering the sludge after the grease collector. The waste 3S water from the washing masses enters the receiving chamber 1. Fatty impurities enter the grease collector 4. Water enters the tank 6, from there it goes to the pneumatic ejector 8 and the water-flow mixture enters the hydrocyclone 9. impurities from the lower part of the hydrocyclone are fed to the grease collector 4. The exhaust air and the fat-free foam are fed to the tank 13 of the foam concentrate. Water previously purified in a hydrocyclone enters the pneumatic flotation unit 15. Foam from the pneumatic flotation unit is transported through the defoamer into the tank 13 of foam concentrate. Purified water from the pneumatic flotation unit through the adsorber 21 and the heat exchanger 22 is fed to a chilled water collection tank. From the tank 13, the foam concentrate is fed through filter 27 for reuse in washing machines. From the grease collector 4 fatty contaminants through the bubbler // $ e ОE 00 СД СО

Description

39 is supplied to a moisture separator 29, where waste oil is used to replenish the lack of fatty compounds to destroy surfactants. The surfactant and oil are mixed and transferred to the tank 34, from where it is taken out for incineration. The oil contaminated with waste is discharged into a collection tank 34. Purified from fatty contaminants and synthetic surfactant, the waste water through the hydraulic lock 32 is recycled. Mechanical impurities deposited in the conical part of the oil separator 29, through the bubbler 39, are fed for dewatering into a spin centrifuge 37 equipped with a replaceable fine filter 38. Here, the products of the regeneration of the clarifying filter and the adsorber filter 21 enter for dehydration. 2 Il.

one

This invention relates to the treatment of laundry wastewater from synthetic surfactants.

The purpose of the invention is to increase the efficiency of the plant by utilizing the foam concentrate and oil impurities and dewatering the sludge obtained after the wastewater treatment.

FIG. 1 shows a functional diagram of the device; in fig. 2 is a section A-A in FIG. one.

A wastewater treatment plant for detergents from synthetic detergents consists of a receiving chamber 1 for receiving waste water from washing machines, a water seal 2 designed to maintain a constant water level in the receiving chamber 1, a window 3 for the overflow of grease soils into the grease collector 4, a window 5 for the discharge of water from the receiving chamber 1 to the water seal 2 and to the water collecting tank 6. The pump 7 is designed to supply water from the water collection tank 6 through the pipeline to the pneumatic ejector 8, built into the open hydrocyclone 9. A pipe 10 connects the pipeline 11 to the pipeline 12; which is connected to the tank 13 foam concentrate.

The valve with electric actuator 14 is installed on the pipeline connecting the open hydrocyclone 9 to the pneumatic floater 15. The fan 16 is connected by pipelines to the pneumatic ejector 8 and pneumatic flotation device 15. The pipeline 17 to the valve connects the lower section of the hydrocyclone 9 to the jGM. 4. Pipeline 18 is connected to a pneumatic flotation device 15 and a foam concentrate tank 13.

The tank 19 collecting the purified water and the pump 20 is connected to the filter-adsorber 21, which is connected to the heat exchanger 22. The antifoam 23 is placed on the pipe 18 and connected to the steam line 24. The valve of the chilled water collection tank 25 is connected to the heat exchanger. An additional pump 26 is connected by pipelines with a tank 13 of foam concentrate and a clarifying filter 27.

The submersible electric pump 28 is placed in the grease collector 4. The water-oil separator 29 is connected to the oil tank 30 by means of the pump 31. The oil-water separator 29 is supplied

a hydraulic lock 32. A pipe 33 connects a collection tank 34 to a moisture-oil separator 29. A pipe 35 is installed on a pipe 33. A pipe 36 connects a spin centrifuge 37 and a replaceable filter 38.

The bubbler 39 is located in the water-oil separator 29 and is connected to the submersible electric pump 28. A pipe 40 connects the upper part of the hydrocyclone to the receiving chamber.

Wastewater Treatment Plant

5 laundries from synthetic detergents works as follows.

Wastewater from washing machines enters the receiving chamber 1, the level of water in which is maintained by the hydraulic seal 2. In the upper part of the receiving chamber 1 there is a window 3 through which fatty and other light materials enter the grease collector 4. Water from the receiving chamber 1 through the window 5 and the water seal 2 enters the water collection tank 6. A pump 7 of the wastewater 5 from the water collection tank 6 is supplied to the air ejector 8 and the water / air mixture enters the open hydro cyclone 9. From the latter, the clarified water for re-treatment is supplied through the spray nozzles to the receiving chamber 1. Suspended substances from the open hydro cyclone 9 through the bottom the orifice is fed to the grease collector 4. Fluid rials and other contaminants are discharged through the nozzle 10 from the hydrocyclone diagram 9 through conduit 11 to the grease.

Together with the exhaust air, the fat-free foam is supplied to the tank 13 of foam concentrate through line 12. At the beginning of operation, the hydrocyclone 9 works from 30 to 40 minutes for recirculation until it is filled and the tanks with waste water, then the valve with electric actuator 14 opens and cleared of

The synthetic surfactant and suspended substances water enters the pneumatic flotation device 15. Air is supplied by the fan 16 to the pneumatic flotation device 15 and the pneumatic ejector 8. The foam obtained in the pneumatic air separator 15 is transported to the tank 13 of foam concentrate through antifoaming agent 23, in which disinfection and the foam is extinguished by steam from a steam line 24 with a valve.

From the pneumoflotter 5, the water purified from the synthetic surfactant flows into the tank 19, from where pump 20 is fed through the adsorber 21 and the heat exchanger 22 to the chilled water collection tank 25 for reuse, for technical needs.

From the tank 13, the foam concentrate is pumped by pump 26 for clarification to the filter 27. The clarified concentrate is fed for reuse in washing machines.

From the grease collector 4, the submersible electric pump 28 receives fatty contaminants through a bubbleter 39 into a water-oil separator 29, which uses waste oil, which is supplied by pump 31 from an oil tank 30, to replenish the lack of fatty compounds for complete destruction of the surfactant. In the water-oil separator 29, the excess of synthetic surfactants is combined with oil, the oil is above the water surface, the synthetic detergents are mixed with oil, and through the discharge pipe 33 are transferred to a collection tank 34, from which they are removed for incineration.

As the waste oil is contaminated with waste, all the oil through valve 35 is discharged into a collection tank 34.

In all cases, before starting work and after cleaning the water and oil separator 29, it is necessary to fill it with water to the level of the water seal 32.

Cleared of fatty contaminants and synthetic surfactants through the hydraulic lock 32, the waste water enters for repeated cleaning. Suspended substances and other mechanical impurities enter the cone. part of the oil separator 29 through the bubbler 39, from where through the pipe 36 is fed for dehydration to the spin centrifuge 37,

equipped with a replaceable fine filter 38. The products of the regeneration of the clarifying filter 27 and the filter-adsorber 21 are also dehydrated here. To dehydrate the waste. A replaceable fine filter 38, if necessary, requires the addition of suspended substances (peat to dust, ground glass, ground sand, crushed stone, etc.) .).

Drainage from waste dewatering

0 centrifuges 37 are fed for re-cleaning.

The installation for the treatment of laundry wastewater from synthetic surfactants allows the utilization of foam concentrate, i.e., reuse.

Using it for washing the laundry, the presence of a moisture-oil separator allows the use of oil impurities to replenish fatty compounds, for the complete destruction of synthetic surfactants. The presence of a replaceable filter contributes to the possibility of "dewatering" sediment obtained after sewage treatment. All this increases the efficiency of the installation.

Claims (1)

Invention Formula A laundry wastewater treatment plant from synthetic surface-active substances containing washing Zshin with a centrifuge, a receiving chamber, a pump, a tank, a pneumatic flotation device, a foam concentrate tank with neHoracHTevneM, an open hydrocyclone with an integrated iTHeBMO ejector, a grease collector and a hydraulic lock built into the receiving chamber, the heat exchanger and the collection capacity of cooled water, so that plant efficiency due to utilization of foam concentrate and oil impurities and sludge dewatering, obtained after purification of waste BAT, it is equipped with a clarifying filter, additional pump, oil separator and a replaceable filter installed in the centrifuge, the clarifying filter being connected to the washing machine and through an additional pump to the foam concentrate tank, and a moisture-oil separator connected to the grease collector and the centrifuge. at S 2 / AT Fi2.g