SU998365A1 - Apparatus for purifying industrial effluents - Google Patents

Description

(54) DEVICE FOR CLEANING Wastewater Wastewater

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The invention relates to the field of purification of waste water by chemical means and is predetermined. for use in sewage treatment plants of enterprises 4aIUInostrotIlI telnoy npohAXiuieHHo.cTH.

. A device for chemical treatment of wastewater is known, in which gShparaty are used as an averager and a mixer, which are elliptical bottom and Kryvtska tanks equipped with an open turbine agitator and an anti-pressure tube. The devices are equipped with an automatic adjustment of the cleaning process based on the potentiometric method, with the ATS sensors installed on the discharge pipe of the l3 devices.

However, the known device is unnecessarily metal consuming, energy intensive and. expensive.

The disadvantage of this system is a significant consumption of reagents, caused by a lagging electrical signal to the actuator, since the quality of the fluid in the branch pipe, where the sensors are installed, does not reflect its state at any time in the tank itself. .

The purpose of the invention: - increase. Efficiency used ny. devices by reducing the consumption of reagents and g intensifying the displacement process.

This goal is achieved by the fact that a device containing a tank with a transfer pipe, a mechanical pulley and an automatic control system, is equipped with an ejector and a washer with a mixer, installed by NVIDIA in the Perelyanny Pipe.

The sensors of the systems: automatic compression are equipped with one at a depth equal to 2/3 of the fluid column, and the second at a depth of 1020, looking at its surface.

The presence of the reagent input unit of the proposed design allows for the in- tensitization of averaging processes and mixing by creating a turbulent yoke. in the extrusion pipe, and thus to eliminate one of the reservoirs intended for preliminary averaging of the composition of the water being purified.

Claims (2)

Placing the sensors in this way allows one to achieve a thin reaction of the system to change the concentration of reagents in the water to be purified and to prevent the leakage of contaminants into the pipeline. The drawing schematically shows a device for the treatment of industrial wastewater. The device for cleaning the treated wastewater contains a tank 1, equipped with an overpressure pipe 2 and a turbine agitator 3. An ejector 4 and a washer mixer 5 are installed in the overpressure pipe and together form an input unit for the reagents. The ejector chamber 6 is connected to the dumps 7 and 8. Adjusted valves 9 and 10 are installed on the above pipelines. The ejector chamber is also connected to the accumulator 11 of the concentrated effluents. In the tank 1, at a depth of 2/3 of the height of the liquid column the pH sensor 12 is installed - the meter of the first automatic control system for the supply of reagents, and at a depth of 10–20 cm from the surface of the water an electrode sensor 13 of the second system of automatic control of the supply of reagents is installed. The treated wastewater is removed through port 14. The device operates as follows. When cleaning industrial wastewater containing heavy metal ions, such as Cc, the waste washing wastewater enters tank 1 through a transfer pipe 2 and an ejector and washer mixer 5 installed under the agitator 3. In the ejector zone, the flow acquires a turbulent character, its the speed increases, which leads to additional suction of concentrated wastewater from storage device 11 through chamber b and vigorous stirring, with wash-out wastewater VODS1MI, simultaneously from dispenser 7 through valve 9 chamber 6 receives concentrated acid, which is necessary to maintain a certain pH value in the reaction zone, and from dispenser 8 through valve 10 the spent pickling solution, which is a chromium reducing agent, enters the chamber. In the zone of the ejector 4 and washer mixer 5, the reactants are quickly mixed with wastewater containing Cgv ions, which allows the reaction to recover hexavalent chromium directly in the lower zone of the reactor, where a turbulent flow is created due to the operation of the agitator 3. Turbulent mode . the flow creates optimal conditions for the reaction, which practically ends in 60-90 seconds. Sensors 12, installed at a depth of not 2/3 of the liquid layer in the tank, are in the zone of the chemical reaction and therefore the signal arriving at the actuator of the valve 9 makes it possible to withstand the specified conditions of the reaction with high accuracy. The fluid layer, located between the sensors 12 and 13, is a buffer tank, which serves both to amplify the fluctuations in the flow rate of the waste liquid and to smooth out concentration fluctuations due to the vigorous movement of the entire liquid volume by a turbine agitator. The role of averaging agent is .. The sensors 12 of the device, which monitor the content of residual hexavalent chromium in a liquid, are installed at a depth of 10–20 cm from its surface. When the concentration is higher than permissible, within 0.001 mg / l, the signal from sensor 13 enters the actuator of valve 10, which automatically increases the dose of reagent entering the container through chamber 6. Such an arrangement of sensors of the automatic regulation system eliminates leakage of unrefined contaminants into discharge pipe 14. The decontaminated waste liquid through pipe 14 is removed from the structure. The proposed design of a device for the treatment of industrial wastewater allows refusing the installation of a separate averager in technical schemes of chemical treatment, which leads to a reduction in metal consumption for the manufacture of averaging agents, and also reduces the consumption of electricity consumed by mixing devices. The combination of averaging processes in the same apparatus, cm (shivania sewage with reagents and carrying out a chemical reaction, reduces the duration of wastewater treatment by 15-20 times, and this in turn reduces the cost of construction of sewage treatment plants. Claim 1 purification of industrial wastewater, containing a tank, a pendulum tube, a mechanical stirrer, an automatic control system for the supply of reagents with sensors, characterized in that, in order to increase the efficiency of use and by reducing the reagent consumption and intensifying the mixing process, it is provided with an ejector and mixer shaybovym installed in the pipe by displacement. 2. The device according to claim 1 ,. This is due to the fact that the sensors of the automatic control system are located in the liquid being cleaned in the tank, one at a depth equal to 2/3 of the liquid column in the tank, the other near its surface. Sources of information taken into account in the examination 1. Vasiltsov E.L. and others. Apparatus for mixing liquid media. L., Mechanical Engineering, p. 20, 29, 1979.