SU1283226A1 - Device for treating scale-oil-containing waste water - Google Patents

Abstract

The invention relates to devices for the treatment of industrial wastewater, can be used in the circulating water supply systems of rolling shops of metallurgical production and improves the efficiency of cleaning. The removal of scale from the settling basin is carried out with the help of the pump 9, which transfers the scale to the tray 18 located along the settling basin, which has a bottom in the form of a filtering perforated element made of sheet material. A pump 9 is installed in a submerged chamber 10, which is fastened to a driving carriage 8, equipped with a device for raising the chamber before moving it from one section of the settler to another. On the suction inlet of the pump there is a bell 12c with an inlet section corresponding to the section of the sump section in its lower part. On the release of scale from the pressure pipe of the pump 9 into the tray a $ (L

Description

18, a nozzle 15 is installed with an inclination 45 in the direction of the flow of scale, before the nozzle 15 there is a brush 17 for cleaning the filter element, and behind the nozzle is a brush-scraper 16 for accelerating the transport of scale in the tray. To remove oil from the surface of the water in the sump, a combination scraper 21 is used in the form of a floating board with

83226

The ticking edge consists of two parallel parts, of which it is twice as long as the back, which makes it possible to remove oil from a distant point of the water surface by creating an oil head when the front part of the scraper is ahead of its removal. Tray 24 for collecting oil is equipped with a floating overflow threshold of 25. 5 Cpt. f-ly, 7 ill.

one

The invention relates to the treatment of industrial wastewater, and more specifically to the removal of scale and oil from a horizontal sump, and can be used in the water recycling systems of rolling shops of metallurgical production

The aim of the invention is to increase the efficiency of wastewater treatment by maximally dewatering scale and oil.

Fig. 1 shows a horizontal settler section, a plan; figure 2 - section aa in figure 1; Fig.3 section BB in Fig.2; figure 4 - section bb In figure 1; figure 5 is a fragment of the plan of figure 1; figure 6 - section GG in figure 1; figure 7 - section dd in figure 1.

The rolling mill wastewater treatment unit is a section of a horizontal settling tank in the form of a rectangular tank, along the sides of which a driving carriage moves, equipped with devices for removing scale from the settling tank and oil from the surface of the water.

The device includes a pipeline 1 supplying the source wastewater, a distribution channel 2 located along the ends of the head part of the settling tank to distribute incoming wastewater through the sections, a perforated partition 3 for uniform distribution of the initial wastewater over the entire width of the section, a section 4 of the settling tank, submerged partition 5, prep bleach with clarified water, overflow threshold 6, one hundred

the bilding level of the treated effluent in the settling tank, a collection channel 7 collecting the clarified drains from the sections, a trolley 8 equipped with a mechanism for lifting the chamber buried in water and a scraper moving along the rails laid on the sides of the section, a pump 9 for pumping scale with water from the settling tank mounted in the chamber, the chamber 10 immersed in the water in which the pump is placed and in which the scraper is attached to remove oil from the surface of the water in the sump, the electric motor 1i with a reducer to move the cart in the section, as well as raising the chamber with a pump and a scraper, a bell 12 on the suction inlet of the pump for collecting the scale with water, pressure pipe 3 from the pump to the tray, the withdrawal device 14 from the pressure pipe to the tray consisting of the pipe 15 set at an angle of 45 to the side flow of scale, scrub-brush 16, which facilitates transportation of scale on the tray, and brushes 17 for cleaning the filter element, tray 18, for transporting scale, reservoir p-drive 19 of scale, filter-hole element 20, which is the bottom of the tray, scraper 21 d removing oil from the surface of the water in the sump, guides 22 for vertical movement of the scraper when changing the level of the liquid, shortened part 23 of the scraper located closer to the bypass tray, by-pass tray 24 for oil, floating overflow threshold 25 that prevents overflow of water with oil , an oil sump 26, common to several sections of the sump.

A device for treating scale-oil-containing wastewater from rolling production works as follows.

The original scale-oil-containing waste water through pipeline 1 enters distribution channel 2, from which through perforated partition 3 enters section 4 of the horizontal settling tank.

The clarified water passes under the submerged partition 5, which prevents the oil from being carried with the clarified water, overflows through the threshold 6 into the collecting channel 7. In the process of settling drains, the scale accumulates in the section tank formed by increasing the slope bottom of the sump in the direction of supplying the initial effluent.

After the accumulation of scale in the settling tank, the carriage 8, which slowly moves against the flow of the treated liquid, is put into operation. At the same time, the pump 9 installed in the chamber is put into operation. Using the proposed device for treating the scale-oil-containing waste water from the rolling mill provides, apart from the known simplification of the technological scheme for the removal and dehydration of scale, effective removal of oil from the water surface. a sump with the lowest water content, a reduction in the volume of the construction part of the sump by reducing the number of 10 submerged in water and the complete 30 number of reserve sections, reducing

with the possibility of lifting it with the help of an electric motor 11 with a gearbox, when moving the cart from one section of the sump to another;

The dross with water is sucked in by the pump through a flattened socket 12.

From the pump, scale with water is fed through a pressure pipe 13, having an outlet device I4 consisting of a pipe 15, a scraper brush 16 located behind the pipe, and a brush 17 located in front of the pipe in tray 18 transporting scale to the storage tank 19, which is common to several sections.

In order to dewater the scale during its transport along the chute, the latter has a bottom in the form of a filtering aperture element 20 made of sheet material.

The oil from the surface of the water in the sump is scraped by a scraper 21 fixed to the chamber buried in water by means of a device with vertical guides 22 allowing the scraper to move in the vertical direction depending on the change

ten

832264

Neither the fluid level when the flow rate of the incoming effluent fluctuates.

When the scraper moves forward, its part 23 is shortened, oil is advanced in advance of the main scraper, improves the condition of removing oil from the most distant part of the tray 24, by increasing the oil backwater.

Water is prevented from entering the oil tray by installing a floating overflow threshold 25 installed with the possibility of stabilizing its upper face at a level separating oil and water.

The oil sump 26 is common to several sump sections.

The use of the proposed device for treating scale-oil-containing waste water of rolling production provides, in addition to the known simplification of the technological scheme for removal and descaling of scale, effective removal of oil from the water surface in the sump with the lowest water content, reduction of the construction part of the sump count reduction account} 5

20

25

30 number of backup sections, reduced

metal consumption by eliminating the need to reinforce the walls of the sections of the settling tanks with steel rails and the elimination of scale dewatering sites that occur during the operation of the horizontal settling tanks of the rolling mills.

F o rmu l invention

Claims (6)

1. A device for treating mill-oil-containing sewage from rolling production, including a horizontal settling section, a driving carriage, a scraper for removing oil from the surface of the water, scaling trays and oils, storage tanks, different with 4TOj for the purpose of reducing wastewater treatment efficiency by maximally dewatering scale and oil; the drive carriage is equipped with a submerged chamber with a pump located in it, a device for lifting the chamber. 2. A device according to Claim 1, characterized in that it is provided with a bell installed on the suction inlet of the pump, the inlet of which corresponds to the cross section of the settler section in its lower part. 3. The device according to claim 1, of which is, in order to dehydrate the scale during transporting it to the tray, the last is with the bottom in the form of a filtering element made of sheet material. 4. The device according to claim 1, characterized in that, in order to clean the filter element and to improve the transportation conditions of scale on the chute, the discharge pipeline -Y- .//   W / / // / J the pump is equipped with a pipe installed at an angle of 45 to the tray, with a brush and a scraper brush. 5. The device according to claim 1, about tl and the fact that the scraper dp remove oil from the surface of the water in the sump is made of two parallel parts, of which the front part is half the length of the back. 6. The device according to Claim I., characterized in that, in order to prevent the entrainment of water together with oil in the bypass tray, the latter is provided with a floating overflow threshold. /five 3 20 fS fs77 tPu.2. -2 fpaz.7