CN106334345B - Hot-rolling mill emulsion purification recovery device - Google Patents

Abstract

The invention discloses a kind of hot-rolling mill emulsion purification recovery device, belong to effluent oil treatment equipment technical field, the device includes oil sump tank, the oil sump tank is built with the weir formula oil receiving equipment floated on liquid level, the oil sump tank is provided with the puff prot that the oil slick of emulsion liquid level is blowed to the weir formula oil receiving equipment, and the liquid after the soiling solution that the weir formula oil receiving equipment is extracted out is by oil, separator removes degreasing inputs the oil sump tank again.The present invention can solve the problems, such as that existing oil skimming purifying rate bottom and efficiency are low during existing Oil scraper work oil skimming.

Description

Hot rolling mill emulsion purification recovery device

technical field

The invention relates to the technical field of waste oil treatment equipment, in particular to a purification and recovery device for hot rolling mill emulsion.

Background technique

At present, the oil scraper is mainly used to clean the emulsified oil and scum of the existing hot rolling mill. This oil scraper consists of an oil collecting tank and an oil cover plate located on the liquid surface of the oil collecting tank. When this oil skimmer works to skim oil, because of the large amount of emulsion flow and replacement, the disturbance is large. On the one hand, the separation time of dirty oil and scum in the emulsion is longer, the separation of dirty oil, scum and emulsion is not complete, and the separated dirty oil layer is relatively thin, which greatly affects the oil skimming purification of the oil scraper efficiency and oil skimming efficiency; on the other hand, in the case of large disturbance of the emulsion, the oil scraper will also remove a large amount of active ingredients of the emulsion as dirty oil and scum, resulting in great waste and increasing the waste water treatment station Demulsification costs.

Contents of the invention

The technical problem to be solved by the present invention is to provide a purification and recovery device for hot rolling mill emulsion. This purification and recovery device can solve the problems of low oil purification rate and low efficiency when skimming existing oil skimmers.

In order to solve the above-mentioned problems, the technical solution adopted by the present invention is: the hot rolling mill emulsion purification and recovery device includes an oil collection tank, and a weir type oil skimmer floating on the liquid surface is installed in the oil collection tank. Above the oil tank, there is an air jet port for blowing the floating oil on the liquid surface of the emulsion to the weir skimmer, and the dirty liquid pumped out by the weir skimmer passes through the oil and water separator to remove the oil and then enters the Said fuel tank.

Among the above technical solutions, a more specific technical solution may also be: the oil and water separator has a box, and a first lower partition, an upper partition, and an upper partition are arranged in sequence from the liquid inlet to the liquid outlet of the box. A partition and a second lower partition, the overflow port of the second lower partition is lower than the overflow port of the first lower partition, and the bottom end of the upper partition is lower than the second lower partition The overflow port of the plate; between the first lower baffle and the upper baffle, there are multiple sets of inclined separation plates with an angle of 30-50 degrees to the horizontal; The upper part of the box body is provided with a waste oil outlet.

Further: the weir-type oil skimmer includes an oil collection tank with an oil outlet channel and outer floats respectively connected to the outer walls of both sides of the oil receiver tank, and inside the oil receiver tank, internal floats are respectively arranged on both sides of the oil outlet channel. Float, the two sides of the inner float and the two side walls of the oil collection tank are respectively provided with weir plates; the two sides of the inner float are equipped with wing plates, one end of the weir plate rests on the wing plate, and the other One end is hinged with the inner wall of the oil collection tank.

Owing to adopting above-mentioned technical scheme, the present invention has following beneficial effect compared with prior art:

1. Since there is a weir-type oil skimmer floating on the liquid surface in the oil collection tank, there is an air jet port above the oil-collection tank to blow the floating oil on the emulsion liquid surface to the weir-type oil skimmer, and the weir-type oil skimmer pumps out The dirty liquid passes through the oil and water separator to remove the oil and then enters the oil collection tank. During oil skimming, the air jet blows the floating oil on the emulsion liquid surface into the weir-type oil skimmer, which improves the recovery rate of dirty oil and scum; while the weir-type oil skimmer always floats on the liquid surface and is not affected by the liquid. Due to the influence of surface disturbance, the mixture of dirty oil, scum and emulsion on the liquid surface is continuously collected to purify the emulsion for the first time, and then the oil and water separator separates the mixture of dirty oil, scum and emulsion again, so that the dirty oil, The scum and the emulsion are separated more thoroughly; the oil skimming purification rate and oil skimming efficiency are high, while reducing the loss of the emulsion and reducing post-treatment costs;

2. Since the oil and water separator has a box body, the first lower partition, the upper partition and the second lower partition are arranged in sequence from the liquid inlet to the liquid outlet of the tank, and the second lower partition The overflow port is lower than the overflow port of the first lower partition, the bottom of the upper partition is lower than the overflow port of the second lower partition, and a waste oil outlet is provided on the upper part of the box close to the upper partition. Among them, the first lower partition and the second lower partition divide the middle and lower space in the tank into a liquid inlet area, a separation area and a clean liquid area, and the upper partition divides the upper space in the tank into an oil collection area and an oil-free area. , in the liquid inlet area, the liquid level rises slowly, and the liquid shock brought by the delivery pump is eliminated; when the liquid level is higher than the first lower partition, the mixture of dirty oil, scum and emulsion overflows to the separation area; the liquid level The separation area rises slowly and passes through the inclined separation plate to continuously separate the dirty oil and scum. At this time, the inclined setting of the separation plate increases the contact surface area of the oil and improves the separation efficiency of the dirty oil, scum and emulsion. And reduce the standing separation time; the rising liquid level is stopped by the upper partition after passing through the separation plate and is stopped in the oil collection area to stand still, so that the dirty oil, scum and emulsion can be separated more thoroughly; when the thickness of the oil layer reaches a certain When the level is high, open the waste oil outlet located in the oil collection area, and the dirty oil and scum are discharged to the waste oil tank; while the separated emulsion passes under the upper partition and overflows the second lower partition to reach the clean liquid area, from The purified liquid returns to the oil collection tank for reuse, which reduces the loss of the emulsion and also reduces the cost of post-processing;

3. Since the outer walls of both sides of the oil collection tank of the weir type oil skimmer are equipped with outer floats, there are inner floats on both sides of the oil outlet channel, and weir plates are respectively installed between the two sides of the inner float and the two sides of the oil collection tank ; Both sides of the inner float are equipped with wing plates, one end of the weir plate is placed on the wing plate, and the other end is hinged with the inner wall of the oil collection tank; the weir plate can be opened or closed according to the buoyancy. In this way, the outer float makes the oil skimmer always float on the liquid surface; it automatically adapts to the fluctuation of the liquid surface, collects the dirty oil and scum on the liquid surface, and is not affected by the disturbance of the online liquid surface. The height can control the opening of the weir plate, so as to obtain a stable thickness of dirty oil, and improve the oil skimming purification rate and oil skimming efficiency.

Description of drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a structural schematic diagram of a weir-type oil skimmer according to an embodiment of the present invention.

FIG. 3 is a top view of FIG. 2 .

Fig. 4 is a structural schematic diagram of an oil and water separator according to an embodiment of the present invention.

Detailed ways

The present invention will be described in further detail below in conjunction with accompanying drawing embodiment:

Embodiment one

The hot rolling mill emulsion purification and recovery device shown in Figure 1 includes an oil collection tank 1 with a liquid inlet and a liquid outlet. In the oil collection tank 1, there is a weir type oil skimmer 3 floating on the liquid surface. Above the oil collection tank 1 Equipped with a plurality of injection nozzles 21 with air injection ports to blow the floating oil on the emulsion liquid surface to the weir type oil skimmer 3, the injection nozzles 21 are connected to the compressed air source through the electromagnetic valve 22; through the first delivery pump group 4 The dirty liquid extracted from the weir-type oil skimmer 3 passes through the oil and water separator to remove the oily liquid, and then enters the oil collection tank 3 through the second delivery pump group 6 .

The weir type oil skimmer 3 shown in Fig. 2 and Fig. 3 includes an oil collection box 32, and a cylinder 35 inserted into the oil collection box 32 is provided in the middle of the oil collection box 32 for an oil outlet channel. The outer walls of both sides of 32 are fixedly connected with six relative outer floats 31, and each outer float 31 is provided with an outer float adjusting bolt 37; There are two inner floats 34, and the inner floats 34 are equipped with inner float adjusting bolts 38; the two sides of the inner float 34 and the two side walls of the oil collection tank 32 are respectively provided with weir plates 33; the outer walls on both sides of the inner float 34 are respectively fixed. There is a wing plate 341, one end of the weir plate 33 is movable on the wing plate 341, and the other end of the weir plate 33 is hinged with the inner wall of the oil collection tank 32; the opening degree of the weir plate can be controlled by the buoyancy.

As shown in Figure 4, the oil and water separator includes a casing 51, between the liquid inlet 5a of the casing 51 and the net liquid outlet 5b2, a first lower baffle 52, an upper baffle 54 and a second baffle are arranged successively. Lower dividing plate 53, the overflow opening of the second lower dividing plate is lower than the overflow opening of the first lower dividing plate 52, and the bottom end of the upper dividing plate 54 is lower than the overflow opening of the second lower dividing plate 53; Between the partition plate 52 and the upper partition plate 54, multiple groups of separation plates 57 with an angle of 30 degrees to the horizontal are installed, and the upper part of the box body 51 close to the upper partition plate 54 is provided with a waste oil outlet 5b1; The partition 52 and the second lower partition 53 divide the space in the tank into the liquid inlet area A, the separation area B and the clean liquid area C, and the upper partition 54 and the separation plate 57 divide the upper space in the tank into the oil collection area D and oil-free zone E.

When oil skimming is in operation, the emulsion is firstly purified through the weir skimmer 3; during the first purification, the air jet blows the slick oil on the liquid surface of the emulsion into the weir skimmer 3, and the outer float 31 makes the weir skimmer The oil machine always floats on the liquid surface and automatically adapts to the fluctuation of the liquid surface without being affected by the disturbance of the liquid surface. It continuously collects the dirty oil, scum and emulsion mixture on the liquid surface, and at the same time adjusts the buoyancy of the outer float 31 through the outer float adjustment bolt 37 Size, the buoyancy of the inner float 34 is adjusted by the inner float adjusting bolt 38, and the opening of the weir plate 33 can be controlled, thereby obtaining a stable thickness of the dirty oil and improving the oil skimming purification rate and oil skimming efficiency.

Then the waste oil, scum and emulsion mixture are purified twice through the oil and water separator 5; during the second purification, the waste oil, scum and emulsion mixture from the weir skimmer 3 enters the liquid inlet area A. The liquid level rises slowly in the liquid inlet area A, and the liquid impact brought by the delivery pump is eliminated; when the liquid level is higher than the first lower partition 52, the mixture of dirty oil, scum and emulsion overflows to the separation area B ; The liquid level rises slowly in the separation zone B, and passes through the separation plate 57 provided with an inclination, so that the dirty oil and the scum are continuously separated. The separation efficiency of slag and emulsion is improved, and the time for standing and separating is reduced; the rising liquid level is stopped by the upper partition 54 after passing through the separation plate 57, and is stopped in the oil collection area D, so that the waste oil, scum and emulsion The separation is more thorough; when the thickness of the oil layer reaches a certain level, the waste oil outlet located in the oil collection area D is opened, and the dirty oil and scum are discharged to the waste oil tank 56; It overflows through the second lower partition 53 to reach the clean liquid area C, and returns to the oil collection tank 1 from the clean liquid outlet 5b2 for reuse, which reduces the loss of the emulsion and also reduces post-processing costs.

Embodiment two

The angle between the separation plate 57 and the horizontal is 50 degrees, and the rest are the same as in the first embodiment.

Claims (2)

1. a kind of hot-rolling mill emulsion purification recovery device, including oil sump tank, it is characterised in that：The oil sump tank is built with floating over Weir formula oil receiving equipment on liquid level, the oil sump tank top are provided with the spray that the oil slick of emulsion liquid level is blowed to the weir formula oil receiving equipment Gas port, the liquid after the soiling solution that the weir formula oil receiving equipment is extracted out is by oil, separator removes degreasing input the oil sump tank again； The weir formula oil receiving equipment, including the receipts fuel tank with oil discharge passage and the outer float for being connected to receipts fuel tank both sides outer wall, institute State and receive in fuel tank, interior float, the interior float both sides and the receipts fuel tank two side are respectively equipped with the oil discharge passage both sides Between be respectively equipped with weir plate；The interior float both sides are equipped with wing plate, and described weir plate one end is ridden on the wing plate, its other end with Inner wall of oil tank is received to be hinged.

2. hot-rolling mill emulsion purification recovery device according to claim 1, it is characterised in that：The oil, separator Have a casing, from the casing inlet to net liquid export between be sequentially provided with the first lower clapboard, upper spacer and second every Plate, the overfall of second lower clapboard are less than the overfall of first lower clapboard, and the bottom of the upper spacer is less than described The overfall of second lower clapboard；It is 30 that multigroup inclined and horizontal sextant angle is provided between first lower clapboard and the upper spacer Spend the separating plate at angle~50 degree angle；Waste oil outlet is offered close to the casing top of the upper spacer.