SU1368265A1 - Apparatus for electrochemical purifying of waste water - Google Patents

Abstract

This invention relates to the treatment of oil emulsion wastewater, c. in particular, to the designs of electrolyzers for the purification of used coolants or cleaning solutions, and it allows to increase the productivity of the apparatus by accelerating the process of clarification and eliminating passivation of the electrodes. The apparatus includes a settling tank and a coagulation chamber in the form of a pipe coaxially installed in the settling tank, interconnected by pipelines and equipped with nozzles for supplying and discharging the water being cleaned, oil and sludge, and the electrolyzer placed in the upper schA has an angle of 55-60, and the inside is 25- 30 parts of the apparatus. The settling tank is divided by a screw-shaped partition, the angle of inclination to the central axis of the apparatus is 55-60 ° C, while the outer and inner partitions of the partitions are connected to the cylindrical surfaces of the coagulation chamber and the settler, and the outer defining slope to the vertical. a pipeline equipped with a 1m feed check valve with the upper part of the sump, and the bottom of the electrolyzer is connected with a pipeline equipped with an adjustable valve and elevator device with a chamber coagulation .- The settling tank is also provided with vertical partitions, one of which is connected to the crush, bottom and vertical wall of the coagulation chamber, the other not reaching the bottom is under the helical partition and connected to it, and a third is connected to the lid of the settling basin and side walls of the coagulation chamber and settling tank. In the space between the screw-like partition and the vertical partition, which does not reach the bottom and which is not connected to it, is located above the latter, there is an unemulsified oil outlet pipe. 1 hp f-ly, 2 ill., 1 tab.

Description

The invention relates to the field of oil emulsion wastewater fHCTKH, in particular to the design of electrolyzers for the purification of used coolant fluids or cleaning solutions, and can be used in engineering, food, chemical and other industries.

The aim of the invention is to increase the productivity of the apparatus by speeding up the clarification process and eliminating the passivation of electrons.

FIG. 1 shows the structure of the proposed apparatus; 2, the partition layout.

The device includes an electrolyzer 1 containing electrodes and communicating downwards through pipeline 2, equipped with an adjustable valve 3 and an elevator device 4, with a coagulation chamber 5. The 5 xsagulation chamber is communicated by the IB lower chapite with the sump 6 using the nipple 7. In addition, the coagulation chamber is equipped with a perforated ring 8 for supplying compressed air. In the upper part of the coagulation chamber 5, there is an opening 9. The settling tank 6 is connected to the electrolyzer 1 via a special pipe 10 with a make-up check valve 11.

22 lead oil with adjustable-fan 23,

Apparatus work: em as follows.

The electrolyzer 1 and the sump 6 are filled with tap water. When this valve 21 on the pipe 20 of the discharge of sludge, the valve 23 on the pipe

22 of the oil lead, the valve 19 on the nozzle 18 of the discharge of the clarified liquid, the valve 3 on the pipe 2 of the coagulum supply are closed. Hydrochloric acid is fed to electrolyzer 1.

and / or calcium chloride and apply voltage to the electrodes. Then the wastewater is supplied to the settling tank 6 through the port 16, opening the valve 17. The waste water enters the coagulation unit 5 through the pipe 7. At the same time, compressed air is fed through the perforated ring 8 into the air-assisting device 4 and into the coagulation chamber 5. The valve 3 is opened and the coagulant is metered from the electrolyzer 1. In the chamber 5, with intensive mixing with compressed air, the coagulation of contaminants occurs and the waste water enters the sump 6 through the opening 9. The light in the settling tank 6. The waste water is discharged from the apparatus through the pipe 18i and part of it enters the electrolyzer 1 through the pipe 10, which is equipped with a reverse submarine

The sump is divided into two parts by a reattach valve 11, whereby the level is liquid areas: a vertical 12 connecting the lid and bottom of the settler and the screw-shaped 13 with an outer generatrix passing along the cylindrical surface of the sump 6 with an angle of inclination to the vertical 55-60 °, and an internal generatrix passing along the cylindrical surface of the coagulation chamber 5 with an angle of inclination to the vertical 25-, the angle of inclination of the surface of the spiral-shaped partition to the central axis of the apparatus being 55-60. The sump is additionally equipped with two vertical partitions 14 and 15. The partition 14 is connected to a helical partition 13, is under it and does not reach the bottom of the sump 6, In addition, the sump 6 is equipped with a waste water supply pipe 16 with an adjustable valve 17, a clarified water discharge pipe 18 with adjustable valve 19, pipe 20 of sludge discharge from re-. Guliruyush valve 21 and pipe.

the bones in the electrolyzer 1, the settling tank biv chamber 5 coagulation is maintained the same (if necessary, the liquid level in the electrolyzer 1

40 may be raised by adding more acid and / or salt). Circulation of liquid in the apparatus is achieved due to the greater density of the liquid in the electrolyzer.

45 and thanks to the air-lift device 4 Periodically, emulsified oils are discharged from the apparatus through the sump 22 and the slurry through the nozzle 20, the table shows the result

50 cleaning. Oil emulsion waste

waters at different angles of inclination; screw partition in the settler.

As can be seen from the table, the maximum

55, the lightening effect (99%) is achieved at ot, 60 °, "7. EZO, OS 3 60

f

(experiments 1-3, 5-7). At «:, 60 °, oij 30, (-from 60 °, the removal of sediment from the spiral joint

the bones in the electrolyzer 1, the settling tank biv chamber 5 coagulation is maintained the same (if necessary, the level of liquid in the electrolyzer 1

0 can be raised by adding more acid and / or salt). Circulation of liquid in the apparatus is achieved due to the greater density of the liquid in the electrolyzer 1

5 and thanks to the air-lift device 4. Periodically, non-emulsified oils are discharged from the apparatus through pipe 22 and sludge through pipe 20, The table shows the results

0 cleaning. Oil emulsion waste

waters at different angles of inclination; screw partition in the sump.

As can be seen from the table, the maximum

5, the lightening effect (99%) is achieved at ot, 60 °, "7. ezo, os 3 60 °

f

(experiments 1-3, 5-7). At ":, 60 °, oij 30, (- from 60 ° the removal of the precipitate from the helical bifurcation to the lower point of the settling tank worsens, the sediment part is retained on the partition wall, the sediment is stirred up and removed from the apparatus. Therefore, the lightening effect in these cases low (experiments 4, 8-12).

Reduced tilt angles oi. from 55 to

50 (experiments 2 and up to 22 (experiments 2

1, 6 and 5), otj

25 seconds

and 1, 6 and 5), and ;,

60 to 55 (experiments 5–8 and 1–4) does not lead to an increase in the effect of clarification; moreover, the height of the apparatus increases significantly, and hence its material consumption, which is not practical, the energy consumption for quenching the waste liquid into the apparatus increases. . In this way,

consider the inter- for O6 - 25optimal should be the shafts for oil - 55-60, 30 °, for ot, - 55-60.

The use of the proposed apparatus allows to expand the functionality of the settler, to ensure removal of non-emulsified and unstable emulsified oil, which eliminates the passivation of the electrodes, reduces the consumption of electrical energy and material of the electrodes, ensures the slurry slides into one point, increases the deposition surface while reducing the volume and temporarily increases the efficiency of fluid clarification.

Claims (2)

1. Electrochemical wastewater treatment apparatus containing an electrolytic electrolyzer with soluble electrons, a settling tank and a coagulation chamber, made in the form of a pipe installed in the settling tank, connected by pipelines and fitted with nozzles 20 25 thirty 35 40 one 2 3 50 55 60 from- / about  , ten 15 s 20 25 thirty 35 40 supply, removal of purified water, oil and sludge, characterized in that, in order to increase the productivity of the apparatus by accelerating the clarification process and eliminating passivation of the electrodes, the electrolyzer is placed in the upper part of the settling tank and connected to the lower part of the coagulation chamber device is placed for supplying compressed air, in its upper part there is an overflow hole, and the sump is equipped with partitions, one of which is made in the form of a screw-shaped element, while the external and internal the forming surfaces of the element are connected to the lateral surfaces of the settling tank and the coagulation chamber, respectively, with the external forming having an angle of inclination to the axis of the apparatus 55-60 °, and the inner 25-30, and the other partitions are made in the form of flat vertical elements and are connected one with the lid and the bottom of the settling tank and with the side surface of the coagulation chamber, the second one, not reaching the bottom of the settling basin, is connected to the helical partition and is located under it, and a third is connected to the settling lid and side surfaces of the settling tank and coagulation chambers, moreover, between the screw-like partition and the vertical partition connected to it, which does not reach the bottom, an oil branch pipe is placed. 2. The apparatus according to claim 1, about tl and h and-y and with the fact that the upper part of the electrolyzer is connected to the upper part of the sump by a pipeline, which houses a make-up check valve. 55 55 5599, 3 99.4 99.2 Phil 2