CN210261221U - Oil-water separation tank provided with central cylinder - Google Patents

Abstract

The utility model relates to an oil-water separation tank provided with a central cylinder in the air flotation solid-liquid separation equipment field. A central cylinder and an annular body are arranged in the oil-water separation tank. And a plurality of tangential outlets surrounding the central cylinder are formed in the side wall of the central cylinder between the closed end and the first partition plate. The inner ring of the annular body is fixed on the outer side wall of the central cylinder in a surrounding way. When the liquid of coagulation sedimentation is input from the input port, the liquid spirally rises along the inner side wall of the central cylinder and overflows to the containing area from the tangential outlet, and then overflows in the oil-water separation tank until the liquid level in the oil-water separation tank submerges the outer ring of the annular body and is positioned below the opening end; therefore, the inner partition plate of the central cylinder can form a part of impurities such as oil and suspended matters at once, the impurities are discharged to the slag conveying port through the pipeline, and the other part of impurities is formed on the liquid level in the oil-water separation tank and can be subjected to secondary impurity separation.

Description

Oil-water separation tank provided with central cylinder

Technical Field

The utility model relates to an air supporting solid-liquid separation equipment field especially relates to an oil-water separation jar that is provided with a center section of thick bamboo.

Background

The existing oil-water separation tank is rarely provided with a cylinder body in the central area, even if the oil-water separation tank is provided with the oil-water separation tank, the oil class and the suspended matters in the produced water of an oil-gas field are low in removal efficiency because the oil-water separation tank is poor in contact mixing effect of dissolved air water and treated water, and the dissolved air water is uneven in water distribution and release and cannot solve the technical problem that the removal rate of the oil class pollutants in the raw water is low.

SUMMERY OF THE UTILITY MODEL

To current technical problem, the utility model provides a be provided with oil-water separation jar of a center section of thick bamboo adopts the whirl technique effectively to improve the contact mixed effect of dissolved air water and treated water, the separation of petroleum type suspended solid and water more thoroughly, is applicable to the basin, the regulation of oily sewage such as petrochemical trade, improves petroleum type suspended solid separation efficiency.

The utility model discloses a following technical scheme realizes:

an oil-water separating tank provided with a central cylinder,

the central area of the oil-water separation tank is provided with a central cylinder with a central shaft parallel to that of the oil-water separation tank, one end of the central cylinder is a closed end and is vertically arranged in the oil-water separation tank, and the other end of the central cylinder is an open end; an input port for inputting liquid into the oil-water separation tank is formed in the closed end or the side wall of the central cylinder close to the closed end, and an output port for outputting the liquid after coagulation and sedimentation is formed in the bottom of the oil-water separation tank;

the closed end and the open end are separated from each other by a first partition plate in the central cylinder, a plurality of tangential outlets surrounding the central cylinder are formed in the side wall of the central cylinder, which is positioned between the closed end and the first partition plate, and a slag conveying port is formed in the side wall of the central cylinder, which is positioned between the open end and the first partition plate; one side of the partition board facing the opening end is fixedly provided with a section of pipeline, and one end of the pipeline penetrates through the first partition board; and

an annular body is sleeved on the central cylinder, an inner ring of the annular body is fixed on the outer side wall of the central cylinder in a surrounding mode, an outer ring of the annular body extends in a radiating mode towards the direction far away from the closed end and surrounds the opening end in a horn shape, a containing area is formed between the annular body and the central cylinder, and the tangential outlet is communicated with the containing area; the length of the annular body is shorter than the length of the inner ring of the annular body to the opening end in the elongation direction of the central cylinder.

Further, the annular body includes:

the inner ring of the fixing ring is fixed on the outer side wall of the central cylinder in a surrounding manner;

one end of the cylinder is fixed on the outer ring of the fixed ring;

and the horn gathering end of the horn ring is fixed on the opposite end of the cylinder.

Further, the annular body is integrally formed.

Furthermore, the side wall of the annular body is provided with an injection hole, and the micro-bubble aqueous solution is injected into the accommodating area through the injection hole.

Furthermore, a sludge discharge port for discharging the coagulated sediments is formed in the closed end or the side wall of the central cylinder close to the closed end.

Furthermore, two input ports are formed in the side wall, close to the closed end, of the central cylinder and are respectively a first tangential inlet for providing raw water and a second tangential inlet for providing gas-liquid mixed liquid.

Furthermore, the height of the tangential inlet I on the central cylinder is lower than that of the tangential inlet II, the raw water speed is higher than that of the gas-liquid mixed liquid, and the water pressure of the gas-liquid mixed liquid meets the following requirements: raw water entering the central cylinder through the first tangential inlet and gas-liquid mixed liquid entering the central cylinder through the second tangential inlet are mixed and then spirally ascend along the inner side wall of the central cylinder to form a cyclone body.

Furthermore, a flow deflector is accommodated in each tangential outlet; and one side of each guide vane in the vertical direction is inclined towards the center direction of the central cylinder in the same direction and synchronously.

Furthermore, a slag scraping device used for scraping scum on the liquid level in the oil-water separation tank into the opening end is arranged in the oil-water separation tank.

Furthermore, an overflow groove which is fixed on the inner wall of the oil-water separation tank in a surrounding mode is formed in the oil-water separation tank, and the liquid level in the oil-water separation tank overflows into the overflow groove through liquid to be kept constant.

The utility model has the advantages that:

1. when the liquid of coagulation sedimentation is input from the input port, the liquid spirally rises along the inner side wall of the central cylinder and flows over to the containing area from the tangential outlet, and then flows over into the oil-water separation tank until the liquid level in the oil-water separation tank submerges the outer ring of the annular body and is positioned below the opening end; therefore, the inner partition plate of the central cylinder can form a part of impurities such as oil and suspended matters at once, the impurities are discharged to the slag conveying port through the pipeline, and the other part of impurities is formed on the liquid level in the oil-water separation tank and can be subjected to secondary impurity separation.

2. The utility model discloses a central section of thick bamboo of oil-water separation jar makes and dissolves air water and can realize whirl mixing, separation and water distribution in proper order with the processing water in a central section of thick bamboo, has improved the deoiling, has removed the efficiency of suspended solid to compact structure, simple, easy manufacturing installation, water distribution district and water catch area do not have the blind spot, accord with water conservancy whirl separation model structure, make full use of tank inner space.

3. The oil residue collecting mode of the utility model ensures that no oil stain is accumulated in the tank, and the treatment effect is stable for a long time and is more ensured.

4. The utility model discloses a structure has the function of whirl degritting, whirl mixing reaction, twice whirl flotation separation, floats fast to easy and removes and can get rid of in same equipment with the slow pollutant of floating speed, can be applicable to and satisfy the requirement of intaking of high concentration oily sewage direct separation to filter.

Drawings

Fig. 1 is a front view of an oil-water separation tank provided with a central cylinder according to embodiment 1 of the present invention;

FIG. 2 is an assembly structural view of the center tube of FIG. 1 with the oil-water separation tank removed;

FIG. 3 is a partial assembled block diagram of the center cartridge of FIG. 2;

FIG. 4 is a partially assembled cross-sectional view of the center cartridge of FIG. 3;

FIG. 5 is a further partial assembly view of the bottom of the central cartridge of FIG. 2;

fig. 6 is a three-dimensional structure view of an overflow chute provided in embodiment 2 of the present invention;

fig. 7 is an assembled perspective view of the oil-water separation tank body and the spiral slag scraping device provided in embodiment 3 of the present invention;

FIG. 8 is a schematic perspective view of the assembled state of the central cylinder and the spiral slag scraping device of FIG. 7 after the oil-water separation tank is removed;

FIG. 9 is a perspective view of the spiral slag scraping device in FIG. 8;

FIG. 10 is a perspective view of the squeegee and flexible blade of FIG. 9 in combination;

FIG. 11 is a schematic top view of the squeegee of FIG. 10;

FIG. 12 is another top view structural illustration of the squeegee of FIG. 11;

fig. 13 is a further top view structural view of the squeegee of fig. 11.

Description of the main symbols:

1-an oil-water separation tank; 2-a central cylinder; 3, a first clapboard; 4-a pipeline; 5-a ring-shaped body; 6-an overflow trough; 7-tangential inlet one; 8-a tangential inlet II; 9-a fixing ring; 10-cylinder; 11-horn ring; 12-a water outlet pipe; 13-a sand discharge pipe; 14-a tangential outlet; 15-flow deflectors; 16-a second separator plate; 17-a slag conveying pipe; 18-a slag discharging weir; 19-a water collecting pipe; 20-a water outlet elbow; 21-a regulating tube; 22-an injection tube; 23-raw water supply pipe; 24-a gas-liquid mixture supply pipe; 25-a spiral slag scraping device; 26-a driver; 27-a scraper; 28-flexible doctor blade one; 29-a slicing plate; 30-reinforcing rib plates; 31-a scaffold; 32-overflow drain.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Referring to fig. 1, fig. 1 is a front view of an oil-water separation tank provided with a central cylinder according to embodiment 1 of the present invention. The oil-water separation tank 1 is internally provided with a central cylinder 2 and an annular body 5. The central area of the oil-water separation tank 1 is provided with a central shaft.

Referring to fig. 2, fig. 2 is an assembly structural view of the central cylinder of fig. 1 after the oil-water separation tank is removed. The central cylinder 2 is a cylinder body which is cylindrical as a whole and hollow inside, and one end of the central cylinder 2 is a closed end and is vertically arranged at the center of the oil-water separation tank 1. The opposite end of the central cylinder 2 is an open end.

A first partition plate 3 and a second partition plate 16 are arranged in the central cylinder 2, and the closed end and the open end are separated by the first partition plate 3. The first clapboard 3 is a cover body with a conical longitudinal section. The first partition plate 3 and the central cylinder 2 are welded and fixed integrally. The second partition plate 16 is a solid plate body which is circular as a whole, and the second partition plate 16 is arranged between the first partition plate 3 and the closed end so as to divide the section area in the central cylinder 20 into a water inlet area and a water outlet area from top to bottom.

An input port used as the liquid input of the oil-water separation tank 1 is arranged on the closed end or the side wall of the central cylinder 2 close to the closed end. In this embodiment, two input ports, namely, a tangential inlet one 7 and a tangential inlet two 8, are formed on the side wall of the central cylinder 2 near the closed end. The height of the tangential inlet one 7 on the central cylinder 2 is lower than the height of the tangential inlet two 8. The first tangential inlet 7 and the second tangential inlet 8 can be horizontally arranged along the upper side wall vertical to the central cylinder 2, and can also be obliquely arranged on the upper side wall of the central cylinder 2 in an upward inclined mode, and a designer can select the inlets according to actual production requirements.

The first tangential inlet 7 is used for inputting raw water, and a raw water supply pipe 23 can be connected to the first tangential inlet 7. The raw water input in this embodiment can be realized by communicating the raw water supply pipe 23 with the water pump, and the water pump can utilize the residual pressure to introduce the raw water with or without medicine into the water inlet area of the central cylinder 2 through the tangential pipe. A gas-liquid mixed liquid is supplied to the tangential inlet II 8, the gas-liquid mixed liquid is dissolved gas water with a large number of micro bubbles, and a gas-liquid mixed liquid supply pipe 24 can be connected to the tangential inlet II 8. The input of the gas-liquid mixture in the present embodiment may be provided by the gas-liquid mixture supply pipe 24 communicating with the microbubble dissolved gas water generating device; or is communicated with the water outlet of the jet flow mixer; and then or communicated with the water outlet of the gas-liquid mixing pump. And the velocity of the raw water is greater than that of the gas-liquid mixed liquid.

The input water pressure of the gas-liquid mixed liquid meets the following requirements: raw water entering the central cylinder 2 through the tangential inlet I7 and gas-liquid mixed liquid entering the central cylinder 2 through the tangential inlet II 8 are mixed and then spirally ascend along the inner side wall of the central cylinder 2 to form a cyclone body.

The bottom of the oil-water separation tank 1 is provided with an output port for outputting liquid after coagulation and sedimentation. In this embodiment, an outlet pipe 12 may be connected to the outlet. The water inlet end of the water outlet pipe 12 is communicated with the water outlet area, and the water outlet end of the water outlet pipe 12 is communicated with the outside of the oil-water separation tank 1. The water outlet pipe 12 can take the liquid after coagulation and sedimentation in the oil-water separation tank 1 as raw water input of the microbubble dissolved gas water generating device.

Referring to fig. 3, fig. 3 is a partial assembly structure view of the center barrel of fig. 2. The side wall of the central cylinder 2 close to the closed end is provided with a sludge discharge port for discharging the coagulated sediments. In this embodiment, a sand discharge pipe 13 can be connected to the sludge discharge port, and a sand discharge pipe valve is installed on the sand discharge pipe 13. The sand drain valve may be an electrically actuated valve or a manually actuated valve. Because the first tangential inlet 7 is at a certain distance from the second partition 16, a sand storage area can be defined between the first tangential inlet 7 and the second partition 16 (or the bottom area of the water inlet area can be defined as the sand storage area).

When raw water enters the water inlet area to form fluid in a rotational flow state, mechanical impurities such as mud and sand with the specific gravity larger than that of water are subjected to the action of centrifugal force, migrate to the cylinder wall of the central cylinder 2, slide downwards along the cylinder wall to the sand storage area to be accumulated, and are discharged by the sand discharge pipe 13 under the control of the sand discharge pipe valve which is opened at regular time. If raw water with a demulsifying flocculant is added to the input raw water at the same time, the raw water without the demulsifying flocculant is fully mixed, collided and aggregated with the raw water with the demulsifying flocculant in a swirling state, and then the fine oil drop suspended matters are aggregated and adhered, so that fine and uniform alum flocs are formed and flow upwards along the side wall of the central cylinder 2.

The gas-liquid mixed liquid in the embodiment is in a rotational flow state after being introduced into the water inlet area through the tangential inlet II 8, and is pushed and mixed by the raw water rising by the rotational flow to form a rotational flow body I. The fine bubbles released from the dissolved air of the gas-liquid mixed liquid are dispersed into the raw water, fully contact and adhere with floc alum floc and oil drop suspended matters in the raw water to form bubble and oil residue adherends, and then rise to the opening end of the central cylinder 2 along with the rotating water flow.

Referring to fig. 4, fig. 4 is a partially assembled cross-sectional view of the center barrel of fig. 3. A plurality of tangential outlets 14 surrounding the central cylinder 2 are formed on the side wall of the central cylinder 2 between the closed end and the first partition 3. The tangential outlets 14 in this embodiment are through slots in a rectangular configuration. In this embodiment, the number of the tangential outlets 14 is set to range from 2 to 12, and the plurality of tangential outlets 14 have the same height on the wall of the central cylinder 2, and the plurality of tangential outlets 14 are distributed on the wall of the central cylinder 2 at equal intervals.

Each tangential outlet 14 houses a baffle 15 for directing the flow of fluid. The number of guide vanes 15 corresponds in this embodiment to the number of tangential outlets 14. The guide vanes 15 are shaped similarly to the tangential outlet 14. The flow deflector 15 may be a straight plate or an arc plate, and may be of other plate structures as long as the flow guiding effect of the flow deflector 15 on the fluid in the central cylinder 2 is not affected.

The guide vanes 15 may in this embodiment be chosen as curved plates and the curved plates may be machined together with the tangential outlet 14. The arc plate and tangential outlet 14 are processed by the following method: a quadrilateral area is selected on the outer side wall of the central barrel 2, three sides of the quadrilateral area are cut to obtain a barrel wall cut block, and the vertical side on the rear side of the rotary outflow is left not to be cut. And then the cylinder wall cutting block with three cut edges is pushed inwards to the center of the central cylinder 2 to a proper angle along the vertical edge which is not cut, so that a tangential outlet 14 and an arc-shaped guide vane 15 can be formed.

The vertical side of each guide vane 15 after being cut is inclined towards the center direction of the central cylinder 2 in the same direction and synchronously, and the inclination angle between each guide vane 15 and the corresponding tangential outlet 14 ranges from 5 degrees to 30 degrees. In this embodiment, the inclination directions of the plurality of flow deflectors 15 are uniform, and the inclination directions of the plurality of flow deflectors 15 after being uniform are opposite to the rotation direction of the first swirling body. So that the guide vanes 15 smoothly guide the water flow in the swirling state out of the central cylinder 2.

A section of pipeline 4 is fixed on one side of the first partition plate 3 facing the opening end, and one end of the pipeline 4 penetrates through the first partition plate 3. The top end of the first partition plate 3 in the embodiment is provided with an oil outlet, the top end of the oil outlet is communicated with one end of the pipeline 4, and an oil collecting area is formed between the top of the first partition plate 3 and the inner wall of the opening end of the central cylinder 2 in the embodiment.

The pipeline 4 is a vertical straight pipe which is integrally in a long pipe shape, the bottom end of the pipeline 4 is communicated with the oil outlet of the first partition plate 3, the middle part of the pipeline 4 is accommodated in the oil receiving area, and the top end of the pipeline 4 extends upwards and then is arranged at the top of the oil receiving area. In the embodiment, the top end of the pipeline 4 is higher than the edge of the top end of the central cylinder 2 by 0.5 cm-5 cm.

And a slag conveying port is formed in the side wall, positioned between the opening end and the first partition plate 3, of the central cylinder 2, is communicated with the inside of the oil receiving area and is positioned at the lowest point of the oil receiving area. In this embodiment, the slag conveying port may be connected to a slag conveying pipe 17, and the slag conveying pipe 17 may discharge oil slag in the oil receiving area out of the oil-water separation tank 1.

The top edge of the central cylinder 2 extends horizontally towards the center and then inclines upwards to form a row of slag weirs 18. In the present embodiment, the slag discharging weir 18 is a ring-like body, and the slope of the slag discharging weir 18 ranges from 10 degrees to 30 degrees.

Referring to fig. 5, fig. 5 is another partial assembly view of the first barrel of fig. 2. The outer side wall of the central cylinder 2 is provided with a plurality of water collecting pipes 19. The water inlet ends of the water collecting pipes 19 are uniformly provided with water collecting bell mouths, the water outlet ends of the water collecting pipes 19 are communicated with the water outlet area, and clear water at the bottom of the oil-water separation tank 1 can be collected through the water collecting bell mouths on the water collecting pipes 19.

A water outlet elbow 20 and an adjusting pipe 21 are fixed on one side of the second partition plate 16 facing the opening end, the water outlet elbow 20 is an L-shaped pipe body integrally, the water inlet end of the water outlet elbow 20 penetrates through the second partition plate 16 to be communicated with a water outlet area, and the water inlet end of the adjusting pipe 21 is communicated with the water outlet end of the water outlet elbow 20; the water outlet end of the adjusting pipe 21 is communicated with an external overflow liquid level tank, thereby realizing the liquid level adjustment of the oil-water separation tank 1 under the continuous working state.

And part of the oil residue adhered body which rises to the first partition plate 3 floats upwards and is lifted through the pipeline 4. When the air bubbles and the oil residue adherends rise, the air bubbles and the oil residue adherends are gathered towards the center of the fluid due to the fact that the density of the air bubbles and the oil residue adherends is smaller than that of water, and the air bubbles and the oil residue adherends quickly float to the lower surface of the first partition plate 3. Along with the improvement of the accumulated liquid level, the bubbles in the first rotational flow body gather at the lower surface of the first partition plate 3 to form large bubbles, and the large bubbles can play a role in floating and lifting the oil residue adhered body, so that the oil residue adhered body overflows from the top of the pipeline 4 and falls into an oil receiving area, and then is discharged out of the tank through the slag conveying pipe 17, and therefore the rotational flow flotation separation of oil residue and water in the central cylinder 2 is completed.

Please refer to fig. 1 to fig. 3. The annular body 5 is sleeved on the central cylinder 2, the inner ring of the annular body 5 is fixed on the outer side wall of the central cylinder 2 in a surrounding manner, the outer ring of the annular body 5 extends in a radiating manner towards the direction far away from the closed end and surrounds the opening end in a horn shape, and a containing area is formed between the annular body 5 and the central cylinder 2. The length of the annular body 5 in the extending direction of the central tube 2 is shorter than the length from the inner ring of the annular body 5 to the opening end.

The tangential outlet 14 communicates with the containment zone. Fluid in the central cartridge 2 may enter the containment zone through the tangential outlet 14. The annular body 5 comprises a fixing ring 9, a cylinder 10 and a horn ring 11, and the fixing ring 9, the cylinder 10 and the horn ring 11 are integrally formed.

The fixing ring 9 is a circular ring body with a hollow middle part, in other embodiments, the fixing ring 9 can also be an oval ring body with a hollow middle part, and can also be in other shapes and structures as long as the connection between the fixing ring and the central cylinder 2 is not affected. In the embodiment, the inner ring of the fixing ring 9 is fixed on the outer side wall of the central cylinder 2 in a surrounding manner, and the fixing ring 9 and the central cylinder 2 are fixed through welding.

The cylinder 10 is a hollow cylinder having a rectangular longitudinal section. One end of the cylinder 10 is fixed on the outer ring of the fixing ring 9. The cylinder 10 is sleeved outside the central cylinder 2 at a position corresponding to the tangential outlet 14.

The horn ring 11 is a ring body having a frustum-shaped longitudinal section. The flared end of the flare ring 11 is fixed to the opposite end of the cylinder 10. The horn ring 11 may be formed by extending the top end of the cylinder 10 upward and inclining outward.

The side wall of the ring body 5 is provided with an injection hole, and the micro-bubble aqueous solution is injected into the containing area through the injection hole. In this embodiment, the injection hole may be provided on the cylinder 10 at a position lower than the tangential outlet 14. The injection hole of the present embodiment may be connected to an injection pipe 23, and the injection pipe 23 may provide the microbubble water solution in the housing area. The input of the microbubble water solution in the injection pipe 23 may be provided by the microbubble water generating device, or by a jet mixer, or by a gas-liquid mixing pump.

And the microbubble aqueous solution in the housing area in the present embodiment is an aqueous solution with extremely fine bubbles. The diameter of the bubbles is smaller than that of the bubbles in the gas-liquid mixture in the central cylinder 2.

The water pressure of the injected microbubble water solution should satisfy: the microbubble water solution entering the containing area through the injection hole and the fluid entering the containing area through the tangential outlet 14 are mixed at a differential speed and then rise spirally along the side wall of the cylinder 10.

The water distribution mode of the containing area is as follows: the water which is separated by cyclone flotation through the first partition plate 3 and is removed with most of the oil residue enters the accommodating area through the tangential outlet 14. The gas-dissolved water in a rotational flow state injected tangentially from the injection hole at the lower part of the area releases a large amount of superfine bubbles in the rising process, the bubbles are in a mist dispersion state at the bottom of the containing area and are contacted and mixed with the water flowing into the containing area through the tangential outlet 14, so that the oil residue in the water forms net capture adhesion and then continuously rotates to rise. When flowing through the horn ring 11, the oil-water separation device disperses in a weak cyclone state in a separation zone formed between the central cylinder 2 and the inner wall of the oil-water separation tank 1. In the separation zone, the oil residue adhered with bubbles floats upwards to form scum because the flow velocity of the fluid is nearly zero. The clean water slowly flows to the bottom of the oil-water separation tank 1, and when flowing through the water collecting horn of the water collecting pipe 19 at the bottom of the central cylinder 2, the clean water is converged into the water outlet area of the central cylinder 2, and finally flows out of the tank through the water outlet pipe 12.

The structure of the tangential outlet 14 of the utility model is combined with the structure of the annular body 5, which does not destroy the flow state of the rotational flow and realizes uniform mixing and uniform water distribution. Especially, when the treated water carrying micro-bubbles enters the separation area through the containing area in a weak cyclone state, the stable and uniform radiation around can be realized, and fine impurities can be continuously gathered. Compare traditional multitube many horn mouths water distribution mode, the utility model discloses a structure velocity of flow is low, and the flow state is steady, and the adhesion is firm, is close non-interfering to the continuous stable state of separation area. And this type of traditional structure is the multipoint mode water distribution, and the homogeneity is in direct proportion with the quantity of water distribution point, but the water distribution point has been more, occupies the separation zone space, and the structure is more complicated, and it is more to amass to hold dirty structure dead zone.

Example 2

The present embodiment 2 differs from embodiment 1 in that an oil collecting means is provided in the oil-water separation tank 1. Referring to fig. 6, fig. 6 is a perspective view of an overflow trough provided in embodiment 2 of the present invention. In this embodiment, an overflow groove 6 circumferentially fixed on the inner wall of the oil-water separation tank 1 is provided in the oil-water separation tank 2, and the liquid level in the oil-water separation tank 1 overflows into the overflow groove 6 through liquid to be kept constant.

In this embodiment, the overflow chute 6 is a ring body having a stepped longitudinal section, and the longitudinal section thereof is L-shaped. The oil-water separator is fixed with the inner wall of the oil-water separation tank 1 by welding. When the floating oil slag is accumulated and thickened, the floating oil slag overflows into the overflow groove 6 through an overflow plate of the annular oil receiving groove, or the liquid level height is lifted by adjusting the water outlet flow, so that the oil is discharged in an overflowing manner. An oil discharge pipe 25 is arranged at the bottom of the oil receiving tank to lead the collected floating oil out of the tank. At the moment, the central cylinder 2 and the pipeline 4 synchronously extend upwards to the top close to the inside of the oil-water separation tank 1, namely the upper parts of the central cylinder 2 and the pipeline 4 directly extend to the inner side of a seal head of the tank top and are welded and fixed, so that the strength and the stability in the tank are enhanced.

In addition, in the embodiment, a plurality of floating oil receiving ports which are uniformly distributed can be arranged in the separation area in the circumferential direction, the floating oil receiving ports automatically lift according to the liquid level, and floating oil residues overflow into the floating oil receiving ports and are collected to the overflow oil discharge pipe 32 to be led out of the tank.

Example 3

Referring to fig. 7, fig. 7 is an assembled perspective view of an oil-water separation tank and a spiral slag scraping device provided in embodiment 3 of the present invention. The present example 3 differs from the example 2 in the manner of oil collection in the oil-water separation tank 1. In the present embodiment, a spiral scum scraper 25 for scraping scum on the liquid surface in the oil-water separation tank 1 into the open end is provided in the oil-water separation tank 1.

Referring to fig. 8, fig. 8 is a schematic view of a combined state of the central cylinder and the spiral slag scraping device of fig. 7 after the oil-water separation tank is removed. The spiral slag scraping device 25 comprises a driving machine 26, a scraping plate 27 and a flexible scraping blade 28.

The output shaft of the driving machine 26 penetrates into the oil-water separation tank 1, extends to the upper part of the central cylinder 2 and is connected with a coupling. The drive machine 26 in this embodiment may be electrically, pneumatically, or hydraulically driven. The drive machine 26 may be of a selected rotational speed or may be a variable speed mechanism. The driving machine 26 is installed on the top of the oil-water separation tank 1, and a support with an intermediate bearing and a shaft sealing structure is arranged between the driving machine and the oil-water separation tank 1, so that the output shaft is prevented from swinging during rotation, and the concentric and stable operation is kept. The shaft sealing structure is arranged when the air floatation device needs to work in a sealing mode or work under pressure, and the leakage of the air floatation device in an internal-external communication mode is prevented. The sealing structure is a packing seal or a mechanical seal. The drive machine 26 may be operated continuously or periodically. When the tank works under pressure (10-300 KpaG), a packing sealing or mechanical sealing mechanism is adopted between the output shaft of the driving machine 26 and the end socket at the top of the oil-water separation tank 1.

Referring to fig. 9, fig. 9 is a perspective view of the spiral slag scraping device in fig. 8. One end of the scraper 27 is a scum pushing and collecting end (not shown), and is rotatably suspended on the top of the central cylinder 2 so that the scraper 27 can rotate relative to the central cylinder 2. The other end of the scraper 27 is a scum scraping end (not shown) and extends to 50-200 mm near the inner wall of the central cylinder 2. The end of the scum pushing and collecting end of the scraper 27 near the output shaft of the driving machine 26 is connected with the output shaft extending above the central cylinder 2. One side of the scraper 27 facing the inside of the central cylinder 2 extends into the separation area below the liquid level, and the opposite side of the scraper 27 back to the inside of the central cylinder 2 is exposed at the top of the central cylinder 2. And one side of the scum scraping end facing the inner wall of the central cylinder 2 is defined as the outer side of the scraper 27, and the inner side of the scraper 27 is defined as the opposite side of the scum scraping end.

An opening (not shown) is formed in one side, facing the inside of the central cylinder 2, of the scum scraping and collecting end surface of the scraper 27, and an arc-shaped slope (not shown) inclined from the top direction of the scum pushing and collecting end to the bottom direction of the scum pushing and collecting end is formed in one side, facing the bottom of the central cylinder 2, of the scum pushing and collecting end surface. The scrapers 27 are capable of pushing the scum floating on the top of the separation area toward the center.

The scraper 27 is a spiral oil residue scraping plate when the driver 26 works, and when the driver 26 stops, the spiral scraper plays a spiral flow guiding role, so that the floating oil residue at the top of the separation area can form a spiral flow state along the plate strip and then is gathered near the central cylinder 2 at the center. The material of the scraper 27 in this embodiment may be stainless steel, and in other embodiments, the material of the scraper 27 may be carbon steel or injection molding.

The squeegee 27 is of one-piece unitary construction in this embodiment. The one-piece integrated-structure scraping plate 27 can be applied to newly manufactured equipment or a central cylinder 2 into which an access hole (the top cylinder opening of the central cylinder 2 is defined as an access hole) can be just put, so that secondary modification of the air float is not required.

In other embodiments, the scraper 27 may also be a plate body with a segmented structure, and the plate body with the segmented and segmented structure may be assembled by segmentation and segmentation, so that most of the plate bodies are applied to the transformation of the existing air floatation device, and are installed in the limited space inside the existing air floatation device. The scraping plate 27 with the split-type split structure comprises a split plate 29, a connecting clamping plate (not shown), a reinforcing rib plate 30 and a bracket 31.

Referring to fig. 10, fig. 10 is a perspective view of the combination of the squeegee and the flexible blade of fig. 9. The divided plate 29 is a plate body having a curvature. In this embodiment, the number of the partition plates 29 is plural, and the plural partition plates 29 are sequentially connected end to end from the top of the central cylinder 2 toward the inner wall of the oil-water separation tank 1. One end of one of the split plates 29 close to the central cylinder is fixedly connected with the outer side of the coupler, the split plate 29 and the coupler are connected through screws in the embodiment, the split plate 29 and the coupler can be welded integrally in other embodiments, and other connection modes can be adopted as long as the stability of connection between the split plate 29 and the coupler is not affected.

The reinforcing rib plate 30 is a plate body having a strip shape as a whole. The reinforcing rib plates 30 are laid on the plurality of split plates 29, the reinforcing rib plates 30 are perpendicular to the split plates 29, and one ends of the reinforcing rib plates 30 are connected with the coupler. In the embodiment, the reinforcing rib plate 30 is connected with the coupler through the screw, and in other embodiments, the reinforcing rib plate 30 and the coupler can be welded integrally, and other connecting modes can be adopted as long as the stability of connection between the reinforcing rib plate 30 and the coupler is not affected. The connection direction of the reinforcing rib plate 30 and the slicing plate 29 is kept consistent.

The holder 31 is an elongated rod as a whole. The number of the holders 31 is plural in this embodiment. The laying direction of one end reinforcing plate 30 of a plurality of brackets 31 is arranged at the top of the reinforcing plate 30 at intervals, and the other ends of the brackets 31 are fixed on the coupler in an intersecting manner. In this embodiment, the bracket 31 and the reinforcing rib plate 30 may be welded or screwed integrally, and the bracket 31 and the coupler may be welded or screwed integrally.

The number of the connecting clamping plates (not shown) is a plurality in the present embodiment, each connecting clamping plate is respectively arranged between two adjacent split plates 29, and the connecting clamping plates are used for connecting the two adjacent split plates 29.

Referring to fig. 11, fig. 11 is a schematic top view of the scraper shown in fig. 10. The scum scraping and collecting end extends to the inner wall of the oil-water separation tank 1 in a spiral involute manner, or extends to the inner wall of the oil-water separation tank 1 in a linear manner, or extends to the inner wall of the oil-water separation tank 1 in an arc manner. In other embodiments, the squeegees 27 may also be straight squeegees or arcuate squeegees. Referring to fig. 12, fig. 12 is another top view structural diagram of the squeegee of fig. 11. When the scraping plates 27 are linear type scraping plates, the scraping plates 27 are arranged tangentially to the periphery of the oil-water separation tank 1, and the number of the scraping plates 27 can be determined according to the diameter of the oil-water separation tank 1 and can be single or multiple. Referring to fig. 13, fig. 13 is a top view structural diagram of the squeegee of fig. 11. When the scrapers 27 are arc-shaped scrapers, the number of the scrapers 27 also depends on the diameter of the oil-water separation tank 1, and may be a single scraper or a plurality of scrapers. Other scraper structures can be adopted as long as the scraper 27 is not influenced to conduct and gather the oil residue on the top of the separation area.

The first flexible blade 28 is an irregularly shaped, arcuate plate in this embodiment, made of a flexible material. The first flexible scraper 28 may be configured as a scum pushing and collecting end of the scraper 27, which is disposed at the bottom of the collection center of the scraper 27. The bottom end of the first flexible scraper 28 is provided with an arc-shaped inclined surface (not shown) which can be attached to the slag discharging weir 18. The first flexible scraper 28 and the scraper 27 can be connected through screws. The bottom end of the first flexible scraper 28 close to the center of the central cylinder 2 is attached to the slope surface of the slag discharge weir 18, and the bottom end of the first flexible scraper 28 far from the center of the central cylinder 2 is attached to the outer side wall of the central cylinder 2 at the bottom of the slag discharge weir 18. The first flexible scraper 28 is used for pushing the scum accumulated at the slag discharge weir 18 into the oil collecting area of the central cylinder 2 along the slag discharge weir 18.

The second flexible scraper (not shown) is a plate body which is integrally arc-shaped. The second flexible scraping blade is arranged in the opening and can be attached to the inner wall of the oil-water separation tank 1. When scraping the slag, the second flexible scraper can move synchronously along with the scraper 27 to scrape off the floating oil slag attached to the inner wall of the oil-water separation tank 1.

Therefore, the scraper 27, the first flexible scraper 28 and the second flexible scraper are connected to form an operation radius covering the top of the whole separation area, and a slag scraping blind area does not exist.

One side of the scraper 27 facing the inside of the central cylinder 2 extends to the position below the liquid level in the separation area, and the opposite side of the scraper 27 back to the inside of the central cylinder 2 is exposed at the top of the separation area. The utility model discloses a degree of depth that scraper blade 27's lower extreme stretched into under the operating liquid level can be 20mm to 500mm to this degree of depth can be through scraper blade 27 in order to adjust at the above-mentioned mounting height of driving machine 26 output shaft. And the scraper 27 runs in the opposite direction to the spiral rotation direction of the fluid on the top of the central cylinder 2, so that scum in the fluid can be collected in an oil collecting area along the inner side of the scraper 27 under hydraulic pushing flow and then is discharged out of the tank body through the slag conveying pipe 17.

When the liquid of coagulation sedimentation is input from the input port, the liquid spirally rises along the inner side wall of the central cylinder and flows over to the containing area from the tangential outlet, and then flows over into the oil-water separation tank until the liquid level in the oil-water separation tank submerges the outer ring of the annular body and is positioned below the opening end; therefore, the inner partition plate of the central cylinder can form a part of impurities such as oil and suspended matters at once, the impurities are discharged to the slag conveying port through the pipeline, and the other part of impurities is formed on the liquid level in the oil-water separation tank and can be subjected to secondary impurity separation.

The utility model discloses a central section of thick bamboo of oil-water separation jar makes and dissolves air water and can realize whirl mixing, separation and water distribution in proper order with the processing water in a central section of thick bamboo, has improved the deoiling, has removed the efficiency of suspended solid to compact structure, simple, easy manufacturing installation, water distribution district and water catch area do not have the blind spot, accord with water conservancy whirl separation model structure, make full use of tank inner space. The oil residue collecting mode of the utility model ensures that no oil stain is accumulated in the tank, and the treatment effect is stable for a long time and is more ensured.

The utility model discloses a structure has the function of whirl degritting, whirl mixing reaction, twice whirl flotation separation, floats fast to easy and removes and can get rid of in same equipment with the slow pollutant of floating speed, can be applicable to and satisfy the requirement of intaking of high concentration oily sewage direct separation to filter.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. An oil-water separating tank provided with a central cylinder is characterized in that,

the central area of the oil-water separation tank is provided with a central cylinder (2) with a central shaft parallel to that of the oil-water separation tank (1), one end of the central cylinder (2) is a closed end and is vertically arranged in the oil-water separation tank (1), and the other opposite end of the central cylinder (2) is an open end; an input port for inputting liquid into the oil-water separation tank (1) is formed in the closed end or on the side wall, close to the closed end, of the central cylinder (2), and an output port for outputting the liquid after coagulation and sedimentation is formed in the bottom of the oil-water separation tank (1);

the closed end and the open end are separated from each other by a first partition plate (3) in the central cylinder (2), a plurality of tangential outlets (14) surrounding the central cylinder (2) are formed in the side wall, located between the closed end and the first partition plate (3), of the central cylinder (2), and a slag conveying port is formed in the side wall, located between the open end and the first partition plate (3), of the central cylinder (2); a section of pipeline (4) is fixed on one side of the first partition plate (3) facing the opening end, and one end of the pipeline (4) penetrates through the first partition plate (3); and

an annular body (5) is sleeved on the central cylinder (2), the inner ring of the annular body (5) is fixed on the outer side wall of the central cylinder (2) in a surrounding mode, the outer ring of the annular body (5) extends in a radiating mode towards the direction far away from the closed end and surrounds the opening end in a horn shape, a containing area is formed between the annular body (5) and the central cylinder (2), and the tangential outlet (14) is communicated with the containing area; the length of the annular body (5) in the direction of elongation of the central cylinder (2) is less than the length of the inner ring of the annular body (5) to the open end.

2. The oil-water separation tank provided with a center cylinder as set forth in claim 1, wherein the annular body (5) comprises:

the inner ring of the fixing ring (9) is fixed on the outer side wall of the central cylinder (2) in a surrounding manner;

a cylinder (10) with one end fixed on the outer ring of the fixed ring (9);

a horn ring (11) whose horn gathering end is fixed to the opposite end of the cylinder (10).

3. The oil-water separation tank provided with a center cylinder as set forth in claim 2, wherein the annular body (5) is integrally formed.

4. The oil-water separation tank with a center tube as set forth in claim 1, wherein an injection hole is formed in a side wall of the annular body (5), and the micro-bubble aqueous solution is injected into the receiving area through the injection hole.

5. The oil-water separation tank provided with the central cylinder as set forth in claim 1, wherein a sludge discharge port for discharging the coagulated sediment is provided on the closed end or on a side wall of the central cylinder (2) near the closed end.

6. The oil-water separation tank provided with the central cylinder as claimed in claim 1, wherein the central cylinder (2) has two input ports on the side wall near the closed end, which are a first tangential inlet (7) for providing raw water and a second tangential inlet (8) for providing gas-liquid mixture.

7. The oil-water separation tank provided with the central cylinder as set forth in claim 6, wherein the height of the tangential inlet I (7) on the central cylinder (2) is lower than that of the tangential inlet II (8), the raw water rate is higher than the gas-liquid mixed liquid rate, and the water pressure of the gas-liquid mixed liquid satisfies: raw water entering the central cylinder (2) through the tangential inlet I (7) and gas-liquid mixed liquid entering the central cylinder (2) through the tangential inlet II (8) are mixed and then spirally ascend along the inner side wall of the central cylinder (2) to form a cyclone body.

8. The oil-water separation tank provided with a central barrel as set forth in claim 1, wherein each tangential outlet (14) accommodates a baffle (15); and one side of each guide vane (15) in the vertical direction is inclined towards the center direction of the central cylinder (2) in the same direction and synchronously.

9. The oil-water separator with a central cylinder according to claim 1, wherein a scum scraping device is provided in the oil-water separator (1) for scraping scum on the liquid surface in the oil-water separator (1) into the open end.

10. The oil-water separation tank provided with a central cylinder as set forth in claim 1, wherein an overflow groove (6) is formed in the oil-water separation tank (1) so as to surround and be fixed to an inner wall of the oil-water separation tank (1), and a liquid level in the oil-water separation tank (1) is kept constant by overflowing the liquid into the overflow groove (6).

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