CN212222478U - Rotational flow air flotation oil removing device for delayed coking device - Google Patents
Rotational flow air flotation oil removing device for delayed coking device Download PDFInfo
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- CN212222478U CN212222478U CN202020741815.6U CN202020741815U CN212222478U CN 212222478 U CN212222478 U CN 212222478U CN 202020741815 U CN202020741815 U CN 202020741815U CN 212222478 U CN212222478 U CN 212222478U
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Abstract
The utility model discloses a postpone whirl air supporting deoiling device for coking device belongs to and postpones coking device with deoiling equipment, and the technical problem that solve is that traditional whirl air supporting device top is the gas-liquid double-phase and backmixing is serious, and unable observation gas, oil, water interface lead to the unable measurement of oil water interface or measure inaccurately, lead to oil, water to discharge simultaneously, and technical scheme is: the structure of the device comprises a cyclone oil removal tank, wherein the interior of the cyclone oil removal tank is divided into a gas-liquid separation area, an oil slick layer area, a sewage separation area and a sedimentation area from top to bottom in sequence; a gas phase outlet is arranged at the upper part of the gas-liquid separation region; an oil drain port is arranged in the floating oil layer area; a sewage draining outlet is arranged at the lower part of the sedimentation area; the oil-water separation area is provided with a central wall cylinder with openings at two ends, and the middle part of the central wall cylinder is provided with a water inlet pipe close to the lower part; the floating oil layer area is communicated with the upper end opening of the central wall cylinder, and the settlement area is communicated with the lower end opening of the central wall cylinder; a water outlet is arranged on one side wall of the rotational flow oil removal tank.
Description
Technical Field
The utility model relates to a delayed coking device is with deoiling equipment, specifically speaking are delayed coking device is with whirl air supporting deoiling device.
Background
In the production process of a delayed coking device (hereinafter referred to as a coking device), an emptying tower (a contact cooling tower) and a fractionating tower can generate oily sewage; the two sewage streams contain much oil, are seriously emulsified, carry coke powder and contain hydrogen sulfide and ammonia. The traditional coking oily sewage treatment method of the oil refinery at present is to send to the unified sewage stripping plant of the whole plant, after mixing with the sulfur-containing sewage (acid water) produced by each plant of the whole plant, carry on "settling oil removal + sewage stripping", remove hydrogen sulfide, ammonia; because the coking oily sewage is high in oil content and carries coke powder, the balance of gas and liquid phases in the sewage stripping tower is influenced, the quality of purified water is influenced, and the coke powder in the coking sewage can be deposited on a tower tray and a heat exchanger after entering the sewage stripping device, so that the sewage stripping device is frequently shut down, and the long-period operation of the device is influenced.
The oil and suspended matter content in the coking sewage is higher, the dirty oil emulsification phenomenon is obvious, and meanwhile, because the sewage contains coke powder with smaller particle size, the coke powder is coated in the emulsified oil, and oil, water and coke powder are suspended and mixed in three phases, so the coke powder particles exist in a stable suspension and dispersion state in the water, the static sedimentation is not suitable for separation, and the traditional treatment processes of gravity sedimentation oil separation, filtration and the like are difficult to remove impurities such as the dirty oil, the coke powder and the like in the water.
The air floatation technology is that a great deal of highly dispersed micro-bubbles are introduced into sewage to make oil drops, suspended matters and the like suspended in the water form a floating body with density smaller than that of the water, and the floating body floats upwards and is layered under the action of buoyancy to form floating slag, so that oil and water are separated. The hydraulic cyclone technology enables the sewage to generate a high-cyclone flow state in a certain mode so as to generate stronger centrifugal force to separate substances with different densities. The cyclone air-float technique is to introduce the sewage of certain pressure gas into the center wall cylinder of the cyclone air-float device, the tangential feeding, the sewage forms the high-speed cyclone in the center wall cylinder and produces the centrifugal action, and release a large amount of microbubbles in the sewage fast, the oil drop that combines with the bubble rises through the bubble and carries out the flotation to the oil drop, the adsorbed less oil drop of bubble is gradually condensed, combine to produce great oil drop, finally form the continuous layer of oil or emulsion in the upper strata of liquid in the air-float chamber, simultaneously, other heavier particles such as fatlute, coke breeze will sink to center wall cylinder bottom. The treated water gushes out from the upper end of the central wall cylinder and flows downwards along the flow passage between the outer wall of the central wall cylinder and the inner wall of the tank body, and is finally discharged from a water outlet at the bottom of the device.
The traditional rotational flow air flotation device needs to be operated in a liquid full state, oil and gas phases are continuously discharged from the top of the device through the pressure in a tank, and the defect that the oil and gas phases are difficult to discharge and then treat exists; in addition, the top in the original device is gas-liquid two-phase, and the back mixing is serious, so that the gas, oil and water interfaces cannot be observed, the oil-water interfaces cannot be measured or are measured inaccurately, and the oil and the water are discharged simultaneously.
The patent document with the patent number of CN110482794A discloses an oil-water treatment system and a treatment process, and the invention also provides an oil-water treatment system using the process, wherein the oil-water treatment system comprises a pretreatment module, a rotational flow air flotation module, a filtering type oil-water separator module, a rotational flow air dissolving air flotation module, an integrated membrane biological processor module and an active carbon filtration module, and all the modules are packaged in corresponding containers. The rotational flow dissolved air flotation device adopted by the technical scheme is a conventional rotational flow air flotation method, and has the defects that the after-treatment is difficult when two phases of oil and gas are simultaneously discharged, an oil-water interface cannot be measured, and oil and water are simultaneously discharged.
Disclosure of Invention
The technical task of the utility model is to provide a postpone for coker whirl air supporting deoiling device, solve traditional whirl air supporting device top and be the gas-liquid double-phase and back mix seriously, can't observe gas, oil, water interface, lead to the unable measurement of oil water interface or measure inaccurately, lead to oil, water simultaneously exhaust problem.
The technical task of the utility model is realized in the following way, the cyclone air flotation oil removing device for the delayed coking device comprises a cyclone oil removing tank, wherein the cyclone oil removing tank is internally divided into a gas-liquid separation area, an oil floating layer area, a sewage separation area and a sedimentation area from top to bottom in sequence; the upper part of the gas-liquid separation area is provided with a gas phase outlet which is positioned at the top of the cyclone oil removal tank; an oil discharge port is arranged in the floating oil layer area and is positioned at the upper side wall of the middle part of the rotational flow oil removal tank; a sewage draining outlet is arranged at the lower part of the settling area and is positioned at the bottom of the rotational flow oil storage tank;
the oil-water separation area is provided with a central wall cylinder with openings at two ends, the central wall cylinder is positioned at the position close to the lower part of the middle part of the rotational flow oil removal tank, and a water inlet pipe is arranged at the position close to the lower part of the middle part of the central wall cylinder; the floating oil layer area is communicated with the upper end opening of the central wall cylinder, and the settlement area is communicated with the lower end opening of the central wall cylinder;
a water outlet is arranged on one side wall of the rotational flow oil removal tank and is positioned above the lower end opening of the central wall cylinder.
Preferably, the outer side wall of the upper end of the central wall cylinder is provided with a coalescer, the coalescer is positioned between the inner side wall of the rotational flow oil removal tank and the outer side wall of the central wall cylinder, oil and part of water can enter an oil floating layer area in the rising process of the water and the oil in the central wall cylinder, and the oil layer and a water layer are prevented from returning through the efficient coalescer, so that the oil removal effect is improved.
Preferably, the water outlet is provided with a water discharge pipe, the water discharge pipe is in an inverted U shape, the top position of the inverted U-shaped water discharge pipe is as high as the lowest end interface position of the gas-liquid separation area, and the operation of the cyclone oil removal tank on a liquid level at a certain height is guaranteed.
Preferably, a demister is arranged at the gas-phase outlet and is positioned on the inner side wall of the top of the cyclone oil removal tank, so that gas-liquid separation is realized, and the gas phase is ensured to contain no liquid drops.
Preferably, the oil slick layer area is provided with a level meter, and the level meter is positioned above the coalescer, so that dirty oil can be discharged immediately according to the oil-water separation interface.
Preferably, the lower end opening of the central wall cylinder is in an inverted splayed shape.
Preferably, the water inlet pipe is provided with a dissolved air mixer, one path of the dissolved air mixer is communicated with the water inlet pipe, and the other path of the dissolved air mixer is communicated with the dissolved air system.
Preferably, the air dissolving system comprises an air dissolving pump, the air dissolving pump is communicated with a flow stabilizer through a pipeline, and the flow stabilizer is communicated with the release valve through a pipeline.
Preferably, drain pipe one end is linked together with whirl deoiling jar, and the drain pipe other end intercommunication has the buffer tank, and the buffer tank passes through filtration intake pump intercommunication filtration equipment.
Preferably, the top of the rotational flow oil removal tank is provided with a pressure control valve for controlling the pressure range in the rotational flow oil removal tank.
The utility model discloses a postpone for coking device whirl air supporting deoiling device has following advantage:
the drain pipe on the side wall of the cyclone oil removal tank is in an inverted U shape, the top position of the inverted U-shaped drain pipe is as high as the lowest end interface position of the gas-liquid separation area, and the cyclone oil removal tank is ensured to be operated at a certain height of liquid level;
a gas-liquid separation area is additionally arranged at the upper part of the cyclone oil removal tank, and a gas phase outlet at the upper part of the gas-liquid separation area is provided with a demister, so that gas-liquid separation is realized, and the gas phase is ensured not to contain liquid drops;
a boundary level meter is arranged in the floating oil layer area and is positioned above the coalescer, so that dirty oil can be discharged immediately according to the oil-water separation interface;
fourthly, a coalescer is arranged on the outer side wall of the upper end of the central wall cylinder, the coalescer is positioned between the inner side wall of the rotational flow oil removal tank and the outer side wall of the central wall cylinder, and oil and part of water can enter an oil floating layer area in the rising process of the water and the oil in the central wall cylinder, so that the oil layer and a water layer are prevented from returning through the efficient coalescer, and the oil removal effect is improved;
and (V) a sedimentation area is additionally arranged at the lower part of the cyclone oil removal tank, water and solid particles enter the sedimentation area at the lower end opening of the central wall cylinder, and the solid particles such as coke powder are deposited at the bottom of the cyclone oil removal tank and are discharged out intermittently through a sewage discharge outlet.
The utility model has the characteristics of reasonable in design, simple structure, easily processing, small, convenient to use, a thing is multi-purpose etc, therefore, has fine popularization and use value.
Drawings
The present invention will be further explained with reference to the accompanying drawings.
FIG. 1 is a schematic structural diagram of a cyclone air-flotation oil removal device for a delayed coking device;
fig. 2 is a schematic diagram of the pipeline of the present invention.
In the figure: 1. the cyclone oil removal tank comprises a cyclone oil removal tank body, 2, a gas-liquid separation area, 3, an oil floating layer area, 4, a sewage separation area, 5, a settlement area, 6, a gas phase outlet, 7, an oil outlet, 8, a sewage discharge outlet, 9, a central wall cylinder, 10, a water inlet pipe, 11, a water discharge outlet, 12, a coalescer, 13, a water discharge pipe, 14, a demister, 15, a boundary gauge, 16, a dissolved air mixer, 17, a dissolved air pump, 18, a flow stabilizer, 19, a release valve, 20, a buffer tank, 21, a pressure control valve, 22 and a filtering water inlet pump.
Detailed Description
The cyclone air flotation oil removing device for a delayed coking device of the invention is described in detail below with reference to the attached drawings and specific examples.
In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and for simplification of description. And are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example (b):
as shown in the attached drawing 1, the cyclone air-flotation oil removal device for the delayed coking device of the utility model structurally comprises a cyclone oil removal tank 1, wherein the cyclone oil removal tank 1 is internally divided into a gas-liquid separation area 2, an oil floating layer area 3, a sewage separation area 4 and a settlement area 5 from top to bottom; the upper part of the gas-liquid separation area 2 is provided with a gas phase outlet 6, and the gas phase outlet 6 is positioned at the top of the cyclone oil removal tank 1; the gas-phase outlet 6 is provided with a demister 14, and the demister 14 is positioned on the inner side wall of the top of the cyclone oil removal tank 1, so that gas-liquid separation is realized, and the gas phase is ensured not to contain liquid drops. An oil discharge port 7 is formed in the floating oil layer area 3, and the oil discharge port 7 is positioned on the upper side wall of the middle part of the rotational flow oil removal tank 1; a sewage outlet 8 is formed in the lower part of the settling area 5, and the sewage outlet 8 is positioned at the bottom of the rotational flow oil storage tank 1; the oil-water separation area 4 is provided with a central wall cylinder 9 with openings at two ends, the central wall cylinder 9 is positioned at the lower part of the middle part of the rotational flow oil removal tank 1, and a water inlet pipe 10 is arranged at the lower part of the middle part of the central wall cylinder 9; the floating oil layer area 3 is communicated with the upper end opening of the central wall cylinder 9, the sedimentation area 5 is communicated with the lower end opening of the central wall cylinder 9, the lower end opening of the central wall cylinder 9 is inverted splayed, and the lower end opening of the central wall cylinder 9 is positioned right above the sewage outlet 8. The coalescer 12 is installed to center wall section of thick bamboo 9 upper end lateral wall department, and the coalescer 12 is located between the inside wall of whirl deoiling jar 1 and the lateral wall of center wall section of thick bamboo 9, because of water, oil in the rising in-process of center wall section of thick bamboo 9, oil and some water can get into the oil slick layer region, prevents oil reservoir and water layer return through high-efficient coalescer 12, increases deoiling effect. The boundary meter 15 is installed in the floating oil layer area 3, and the boundary meter 15 is located above the coalescer 12, so that dirty oil can be discharged immediately according to the oil-water separation interface. A water outlet 11 is arranged on one side wall of the rotational flow oil removal tank 1, and the water outlet 11 is positioned above the lower end opening of the central wall cylinder 9. The water outlet 11 is provided with a water outlet pipe 13, the water outlet pipe 13 is in an inverted U shape, the top position of the inverted U-shaped water outlet pipe 13 is as high as the lowest end interface position of the gas-liquid separation area 2, and the operation of the rotational flow oil removal tank 1 on a certain height liquid level is ensured.
As shown in the attached drawing 2, before the sewage of the primary sedimentation oil separation enters the cyclone oil removal tank 1, dissolved air water (nitrogen, water mixture, or water vapor, water mixture) with a certain pressure is introduced, after being uniformly mixed by the dissolved air mixer 16, the sewage dissolved with nitrogen enters the central wall cylinder 9 of the cyclone oil removal tank 1 in a tangential direction, the sewage forms a high-speed cyclone in the central wall cylinder 9 and generates a centrifugal effect, a large number of micro bubbles are rapidly released, oil drops combined with the bubbles rise through the bubbles to float the oil drops, smaller oil drops absorbed by the bubbles are gradually condensed and combined to generate larger oil drops, and the upper layer forms the floating oil layer area 3. The floating oil layer area 3 is provided with a boundary level meter 15, and dirty oil is periodically cut off according to the oil-water boundary level and is discharged to a dirty oil tank through an oil outlet 7. The gas phase outlet 6 passes through the gas-liquid separation area 2 and the demister 14, and separated liquid drops enter a gas pipe network. The water in the floating oil layer area 3 is separated from oil by the high-efficiency coalescer 12 and then is settled through the outer wall of the central wall cylinder 9. The mixture of water, coke powder, oil sludge and the like with high density which flows out spirally in the central wall cylinder 9 is discharged from the lower opening of the central wall cylinder 9 for sedimentation. The solid such as coke powder and the like is settled at the bottom of the cyclone oil removal tank 1, and is discharged to a scum tank of a coking device through the pressure in the cyclone oil removal tank 1 periodically, and is pumped back to a coke tower for recycling. The treated sewage automatically flows into the buffer tank 20 from the middle lower part of the self-flow oil removal tank 1 through the U-shaped drain pipe 13 and is sent to the filtering equipment through the filtering water inlet pump 22. The oil content of the treated sewage is less than or equal to 300 mg/L. The top of the cyclone oil removal tank 1 is provided with a pressure control valve 21 which controls the pressure in the cyclone oil removal tank 1 to be 10-100kPa (G). The dissolved air system adopts a dissolved air pump 17 to pump out the treated sewage to be mixed with nitrogen, forms saturated dissolved air water through a flow stabilizer 18, and injects the dissolved air water into the raw material sewage through a release valve 19.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. A cyclone air-flotation oil removal device for a delayed coking device comprises a cyclone oil removal tank and is characterized in that the interior of the cyclone oil removal tank is sequentially divided into a gas-liquid separation area, an oil floating layer area, a sewage separation area and a sedimentation area from top to bottom; the upper part of the gas-liquid separation area is provided with a gas phase outlet which is positioned at the top of the cyclone oil removal tank; an oil discharge port is arranged in the floating oil layer area and is positioned at the upper side wall of the middle part of the rotational flow oil removal tank; a sewage draining outlet is arranged at the lower part of the settling area and is positioned at the bottom of the rotational flow oil storage tank;
the oil-water separation area is provided with a central wall cylinder with openings at two ends, the central wall cylinder is positioned at the position close to the lower part of the middle part of the rotational flow oil removal tank, and a water inlet pipe is arranged at the position close to the lower part of the middle part of the central wall cylinder; the floating oil layer area is communicated with the upper end opening of the central wall cylinder, and the settlement area is communicated with the lower end opening of the central wall cylinder;
a water outlet is arranged on one side wall of the rotational flow oil removal tank and is positioned above the lower end opening of the central wall cylinder.
2. The cyclone air flotation oil removing device for the delayed coking unit according to claim 1, wherein a coalescer is disposed at the outer side wall of the upper end of the center wall cylinder, and the coalescer is located between the inner side wall of the cyclone oil removing tank and the outer side wall of the center wall cylinder.
3. The cyclone air flotation oil removal device for the delayed coking unit according to claim 1, wherein the drain pipe is arranged at the drain port and is in an inverted U shape, and the top position of the inverted U-shaped drain pipe is as high as the lowest end interface position of the gas-liquid separation region.
4. The cyclone air-flotation oil removing device for the delayed coking unit as claimed in claim 1, wherein a demister is arranged at the gas phase outlet and is positioned on the inner side wall of the top of the cyclone oil removing tank.
5. The cyclone air-flotation oil removing device for the delayed coking unit according to claim 1, wherein the oil-flotation layer area is provided with a level gauge which is positioned above the coalescer.
6. A cyclone air flotation oil removing device for a delayed coking unit according to any one of claims 1 to 5, wherein the lower end opening of the central wall cylinder is in an inverted splayed shape.
7. The cyclone air-flotation oil removing device for the delayed coking device according to claim 1, wherein a dissolved air mixer is arranged on the water inlet pipe, one path of the dissolved air mixer is communicated with the water inlet pipe, and the other path of the dissolved air mixer is communicated with a dissolved air system.
8. The cyclone air flotation oil removing device for the delayed coking device according to claim 7, wherein the air dissolving system comprises an air dissolving pump, the air dissolving pump is communicated with a flow stabilizer through a pipeline, and the flow stabilizer is communicated with a release valve through a pipeline.
9. The cyclone air-flotation oil removing device for the delayed coking device according to claim 3, wherein one end of the drain pipe is communicated with the cyclone oil removing tank, the other end of the drain pipe is communicated with a buffer tank, and the buffer tank is communicated with the filtering equipment through a filtering water inlet pump.
10. The cyclone air flotation oil removing device for the delayed coking unit according to claim 1, wherein a pressure control valve is arranged at the top of the cyclone oil removing tank.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020741815.6U CN212222478U (en) | 2020-05-07 | 2020-05-07 | Rotational flow air flotation oil removing device for delayed coking device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020741815.6U CN212222478U (en) | 2020-05-07 | 2020-05-07 | Rotational flow air flotation oil removing device for delayed coking device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115536104A (en) * | 2022-10-17 | 2022-12-30 | 郑州标京环保科技有限公司 | Oily wastewater treatment system and treatment method |
| CN116573716A (en) * | 2023-05-31 | 2023-08-11 | 扬州澄露环境工程有限公司 | Efficient rotational flow oil removing device |
-
2020
- 2020-05-07 CN CN202020741815.6U patent/CN212222478U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115536104A (en) * | 2022-10-17 | 2022-12-30 | 郑州标京环保科技有限公司 | Oily wastewater treatment system and treatment method |
| CN116573716A (en) * | 2023-05-31 | 2023-08-11 | 扬州澄露环境工程有限公司 | Efficient rotational flow oil removing device |
| CN116573716B (en) * | 2023-05-31 | 2023-11-03 | 扬州澄露环境工程有限公司 | Efficient rotational flow oil removing device |
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