CN219526323U - Novel high-efficient rotary liquid coarse graining coalescence oil-water separation device - Google Patents

Abstract

The utility model discloses a novel efficient rotary liquid coarse-grain coalescent oil-water separation device, which comprises a cylinder and sealing heads at two sides of the cylinder, wherein a rotational flow area, a coalescent area and a filtering area are sequentially arranged in the cylinder, a water inlet is formed at one side of the sealing head close to the rotational flow area, and a water outlet is formed at one side of the sealing head close to the filtering area; the cyclone is arranged in the cyclone zone, the cyclone comprises a cyclone cavity, a shrinkage cavity, a tail cone and a tail pipe which are sequentially arranged, an inlet is formed in the upper side surface of the cyclone cavity, a bottom flow port is formed in one side of the tail pipe away from the tail cone, and an overflow port is formed in one side of the cyclone cavity away from the shrinkage cavity; the coalescence zone is internally provided with a corrugated pipe polymerizer, and the filtration zone is internally provided with a polymerization separator. The utility model has the advantages of no power slag discharge, good sealing performance during operation, repeated utilization of flotation gas, difficult leakage of medium peculiar smell, no overflow of a slag discharge mode, no power of a system, no operation parts, complete dependence on water flow to bring waste slag into a slag discharge pipe to flow out of a machine body, no maintenance and reduction of operation cost.

Description

Novel high-efficient rotary liquid coarse graining coalescence oil-water separation device

Technical Field

The utility model relates to the technical field of oil remover equipment, in particular to a novel efficient hydrocyclone coarse-grained coalesced oil-water separation device.

Background

In the current sewage deoiling (oil refining and petrochemical) process, the sewage treatment with oil content less than or equal to 250ppm generally adopts multiple processes such as primary flotation, secondary flotation and the like to reduce the oil content in the water to below 20ppm, thus having great requirements on production sites and energy consumption. The same type of air-float degreasing equipment is also commonly a pressurized dissolved air type and an aerator. Electrical energy and a large amount of industrial wind are consumed during operation.

Disclosure of Invention

The utility model aims to solve the technical problems of providing a novel high-efficiency rotary liquid coarse-grain coalescence oil-water separation device, which has the advantages of no power slag discharge, good sealing performance in operation, reutilization of flotation gas, difficult leakage of medium peculiar smell, no power of a system and no operating parts, and completely depends on water flow to bring waste slag into a slag discharge pipe to flow out of an engine body, so that maintenance is not needed, and the operating cost is reduced.

In order to solve the technical problems, the utility model provides a novel efficient cyclone coarse-grain coalescent oil-water separation device which is characterized by comprising a cylinder body and sealing heads at two sides of the cylinder body, wherein a cyclone area, a coalescent area and a filtering area are sequentially arranged in the cylinder body, a water inlet is formed in one side of the sealing head close to the cyclone area, and a water outlet is formed in one side of the sealing head close to the filtering area; the cyclone is arranged in the cyclone area and comprises a cyclone cavity, a shrinkage cavity, a tail cone and a tail pipe which are sequentially arranged, an inlet is formed in the upper side surface of the cyclone cavity, a bottom flow port is formed in one side, away from the tail cone, of the tail pipe, and an overflow port is formed in one side, away from the shrinkage cavity, of the cyclone cavity; a bellows polymerizer is arranged in the coalescing region, and a polymeric separator is arranged in the filtering region.

Further, an anti-corrosion coating is arranged on the inner side wall of the cylinder.

Further, a plurality of mud discharging openings are formed in the bottom of the cylinder body.

Further, the cylinder top is provided with the oil collecting chamber, oil collecting chamber upside is provided with the oil collecting cabinet, be provided with oil drain port and gas vent on the oil collecting cabinet.

Further, the bottom of the cylinder body is provided with a supporting device.

Further, the corrugated pipe polymerizer is made of stainless steel materials.

Further, the operating conditions of the device are as follows: oil content of inlet water: less than or equal to 250ppm; inlet water pressure: 0.4-0.6mpa; residence time: 20min; oil content of effluent: less than or equal to 20ppm; operating pressure: 0.4-0.6mpa; operating temperature: 5-75 ℃; pressure drop: 0.02mpa.

The utility model has the beneficial effects that: 1. the device adopts unpowered slag discharge, and the main body of the device is in a tank shape, so that the sealing performance is good during operation, flotation gas can be recycled, medium peculiar smell is not easy to leak, and secondary pollution is avoided. The slag discharging mode is overflow, the system is unpowered and has no operating mechanism, and the waste slag is completely brought into a slag discharging pipe by water flow to flow out of the machine body. Therefore, the fault rate is zero, maintenance is not needed, and the operation cost is reduced. The sewage treatment capacity of the machine is large, the water retention time is short, and the sewage treatment capacity is only 15-20 minutes. The application range is wide, the operation environment is good, different flotation agents (organic and inorganic) can be added to different sewage, the size and the quantity of generated microbubbles are adjustable, and various sewage purification can achieve ideal effects.

2. The energy consumption is low, the management is easy, the operation is good, the electricity is saved by 40% compared with other flotation machines, the operation cost is low, the stable operation of the equipment can be ensured by only operating one water pump (multiphase flow pump), the equipment can be started at any time, and the equipment can be stopped at any time.

3. Because the aeration mode of the machine is secondary dissolved air, the flotation air bubbles have small particle size, more air bubbles, the particle size is between 10 and 60 microns, and the air bubbles with the particle size of 20 to 30 microns account for more than 70 percent, so the machine is particularly suitable for flotation, has good flotation effect, has higher removal rate than other air flotation machines, has no secondary pollution, can recycle the released air, and only needs to supplement trace air.

4. Small occupied area, convenient installation and low one-time investment. The sewage treatment cost is low, and the main body can be manufactured by adopting a composite steel plate (a stainless steel plate with a lining) according to the requirements of users, so that the service life of equipment is prolonged. The full-automatic operation does not need personnel operation, and the performance is stable, safe and reliable.

Drawings

Fig. 1 is a schematic view of the overall structure of the present utility model.

Fig. 2 is a schematic view of the cyclone structure of the present utility model.

The reference numerals in the figures illustrate: 1. a cylinder; 2. a seal head; 3. a swirl zone; 4. a coalescing zone; 5. a filtration zone; 6. a water inlet; 7. a water outlet; 8. a cyclone; 81. a swirl chamber; 82. a shrink chamber; 83. caudal vertebrae; 84. a tail pipe; 85. an inlet; 86. a bottom flow port; 87. an overflow port; 9. a bellows polymerizer; 10. a mud discharging port; 11. an oil drain port; 12. an exhaust port; 13. an oil collection cabinet; 14. an oil collection chamber; 15. and a supporting device.

Detailed Description

The present utility model will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the utility model and practice it.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Referring to fig. 1 to 2, an embodiment of the novel efficient cyclone coarse-grain coalescent oil-water separation device comprises a barrel 1 and sealing heads 2 at two sides of the barrel 1, wherein a cyclone region 3, a coalescent region 4 and a filtering region 5 are sequentially arranged in the barrel 1, a water inlet 6 is formed at one side of the sealing head 2 close to the cyclone region 3, and a water outlet 7 is formed at one side of the sealing head 2 close to the filtering region 5; a cyclone 8 is arranged in the cyclone region 3, the cyclone 8 comprises a cyclone cavity 81, a shrinkage cavity 82, a tail cone 83 and a tail pipe 84 which are sequentially arranged, an inlet 85 is formed in the upper side surface of the cyclone cavity 81, a bottom flow port 86 is formed in one side, away from the tail cone 83, of the tail pipe 84, and an overflow port 87 is formed in one side, away from the shrinkage cavity 82, of the cyclone cavity 81; a bellows polymerizer 9 is arranged in the coalescing zone 4, and a polymeric separator is arranged in the filtration zone 5.

When in use, the oil-water mixture enters the separator through a plurality of staggered inlets 85 on the cyclone cavity 81 to form spiral flow, when the water inlet linear speed is 6 meters per second, the rotation speed can reach 1600-1800 turns, and the fluid is accelerated and a stable centrifugal force field is formed in the separator through two-stage contraction of the contraction cavity 82 and the tail cone. According to Stokes' law, heavy phase water in the oil-water mixed liquid is thrown to the inner wall of a cyclone 8 under the action of strong centrifugal force to be discharged from a bottom flow port 86 in a spiral state, light phase oil is coalesced to form an oil core towards the center of the separator and is discharged from an overflow port 87 to realize oil-water separation, so that oil-water separation can be realized within a few seconds, a cyclone tube works under a certain pressure difference condition, and heavy water is thrown to the outside by utilizing the gravity difference of two non-phase solution bodies and utilizing the centrifugal force generated by high-speed rotation of oily sewage in a shrinkage cavity 82 and a tail cone, the heavy water is discharged from the bottom flow port 86 in a spiral state, and lighter oil drops are discharged from the overflow port 87 in a low-pressure area in the center of the tail cone, so that oil-water separation is realized, and the removal rate of the oil can reach more than 90 percent;

the liquid flow enters the oil removal cyclone 8 through a tangential inlet. The velocity of which is translated into tangential velocity at the inlet zone, imparting a centrifugal force on the liquid flow. When the incoming flow moves down to the cone section of the cyclone 8, the tangential velocity is increased and the centrifugal force is increased. The heavier aqueous phase components are moved to the outer wall of the cyclone 8 due to the higher centrifugal force. The lighter particles, mainly oil droplets, move towards the inner central zone of the cyclone vessel 8. The aqueous phase component is removed from the tailpipe 84 and becomes the underflow of the de-oiling cyclone 8.

Due to the back pressure of the underflow, the oil flow in the central zone moves axially above the cyclone 8 and overflows from the discharge orifice as overflow. By maintaining a certain underflow back pressure, the oil flow in the central zone is forced to drain from overflow port 87, the size of the drain orifice being designed to be about 2-3% of the total inlet flow.

The oil removal hydrocyclone 8 is mainly used for removing low levels of concentrated oil droplets (200-2000 ppm) from oily sewage. The underflow is very clean water with about 30-50ppm of oil content. The overflow is an oil-rich underflow with about 1-10% oil in the overflow water, depending on the oil concentration of the incoming liquid stream.

The overflow is typically 2% of the total incoming liquid flow. The discharged overflow may be discarded or recycled into an upstream process.

The liquid enters the separator under certain pressure and speed to generate high-speed rotation, different centrifugal force fields are generated by utilizing different density differences of oil and water, and the oily sewage is treated by utilizing centrifugal force, so that the separation rate is more than ten times faster than that of common standing separation.

On the basis of the separation, the liquid is combined to stably flow, and meanwhile, external force is assisted to enable fine oil materials and water in the liquid to be rapidly layered, so that the oil-water separation efficiency and effect are improved. The petroleum content of the separated liquid is 20-30mg/l.

Then the oil is removed by utilizing the specific gravity difference of oil and water to make the oil drop float and collect at the wave crest of the plate, and the oil drop can be separated and removed by means of Ha Zhenjian pool precipitation principle, so that the corrugated plate can be made into variable-interval variable-water flow line, the water cross section is changed, and the water flow is diffused and contracted state alternatively flows to produce pulsating (sinusoidal) water flow, so that the collision probability between oil drops can be raised, and the oil drop can be greatly increased, and the oil-water separation can be implemented. Because of the oleophilic property of the corrugated plate, a layer of oil film is formed on the surface of the corrugated plate, the oil film is gradually thickened, after oil beads with a certain size are formed by the surface tension of the oil, the oil beads fall off under the gravity of the oil beads and the impact force of water flow, float upwards along with the water flow through the oil floating holes at the wave crest, and meanwhile, the coalescing surface area of the corrugated plate layer is increased, and the oil removing effect is enhanced. After the oily sewage passes through a tortuous flow passage in the polymerizer, most of the 10-20 mu m floating oil can be polymerized and separated while the liquid is uniformly distributed, and the effluent after oil removal at this stage is generally ensured to be below 20 PPM.

And discharging the dirty oil after polymerization separation, and performing polymerization separation on the treated water by a group of polymerization separators made of stainless steel materials to obtain the standard discharge. Or the sewage is input into a sewage treatment plant for further biochemical treatment. The coarse-grain polymerization element can capture oil droplets with the size larger than 15 microns in water, so that the oil droplets are separated from the coarse-grain filter element after the oil droplets become larger gradually, the oil droplets are separated from the coarse-grain filter element to achieve the purpose of oil-water separation, and the stage is the effective supplement of the previous stage, so that the oil in the sewage is further treated, and the petroleum content in the discharged water is ensured to be less than 20mg/l (not including emulsified oil and dissolved oil).

The oil separated from each stage gathers on the upper part of the equipment, when the oil layer reaches a certain oil layer in the equipment, the oil is automatically collected and discharged into the oil collecting cavity 14 by the floating oil collector, when the oil layer in the collecting cavity reaches a certain liquid level, a signal is transmitted to the PLC control cabinet by the liquid level sensor, and the electric valve (which can be opened manually) is automatically opened to discharge the oil to the dirty oil collecting cabinet 13. The oil separated and discharged by the oil-sewage separation device can be directly recovered for comprehensive utilization. The built-in filler and the coarse-grained filter core can cause partial blockage phenomenon due to the increase of attachments in the long-term operation process of the equipment, at the moment, a differential pressure transmitter arranged on the water inlet and outlet cabins can acquire differential pressure information and feed the differential pressure information back to the PLC system, and when the front differential pressure and the rear differential pressure are larger than 0.15mpa, the automatic back flushing of the equipment is started. The backwashing time is generally controlled to be 15-25 minutes, after the steam cleaning of the prior steam heating system is finished, the high-pressure (0.6 mpa) water inlet of the clean water system is used for carrying out strong backwashing, the backwashed sewage is discharged from the backwashing water outlet, and the equipment is restored to normal operation. The separated and precipitated oil sludge is collected by a porous sludge collecting pipe arranged at the bottom of the tank body after sedimentation and is discharged periodically, and the oil sludge can be used as fuel after dehydration treatment.

In order to ensure that the equipment can normally work in winter, a steam heating system or a heating device for maintenance is also arranged in the device when necessary, (determined according to the requirement of a user) and is provided with a temperature automatic control unit and a temperature display instrument; in order to ensure the normal operation of the device, a pressure in-situ display instrument and an overpressure automatic protection device (a safety valve) are also arranged on the equipment.

The control box provided by the equipment has all automatic control functions and light display required by the oil-sewage separation device, can be simultaneously converted into manual control, and has reliable performance.

The corrugated pipe polymerizer 9 is made of stainless steel materials and is formed by special pressing and assembling, so that the corrugated pipe polymerizer has the advantages of uniform water distribution, longer sewage flowing distance, shortened oil particle floating distance, increased oil bead polymerization probability, accelerated oil-water polymerization separation time and ensured stability of subsequent separation efficiency.

The bottom of the cylinder body 1 is provided with a supporting device 15 for supporting the whole device and ensuring the stability during the operation.

The working conditions of the device are as follows: oil content of inlet water: less than or equal to 250ppm; inlet water pressure: 0.4-0.6mpa; residence time: 20min; oil content of effluent: less than or equal to 20ppm; operating pressure: 0.4-0.6mpa; operating temperature: 5-75 ℃; pressure drop: 0.02mpa.

The device adopts unpowered slag discharge, and the main body of the device is in a tank shape, so that the sealing performance is good during operation, flotation gas can be recycled, medium peculiar smell is not easy to leak, and secondary pollution is avoided. The slag discharging mode is overflow, the system is unpowered and has no operating mechanism, and the waste slag is completely brought into a slag discharging pipe by water flow to flow out of the machine body. Therefore, the fault rate is zero, maintenance is not needed, and the operation cost is reduced. The sewage treatment capacity of the machine is large, the water retention time is short, and the sewage treatment capacity is only 15-20 minutes. The application range is wide, the operation environment is good, different flotation agents (organic and inorganic) can be added to different sewage, the size and the quantity of generated microbubbles are adjustable, and various sewage purification can achieve ideal effects.

The energy consumption is low, the management is easy, the operation is good, the electricity is saved by 40% compared with other flotation machines, the operation cost is low, the stable operation of the equipment can be ensured by only operating one water pump (multiphase flow pump), the equipment can be started at any time, and the equipment can be stopped at any time.

Because the aeration mode of the machine is secondary dissolved air, the flotation air bubbles have small particle size, more air bubbles, the particle size is between 10 and 60 microns, and the air bubbles with the particle size of 20 to 30 microns account for more than 70 percent, so the machine is particularly suitable for flotation, has good flotation effect, has higher removal rate than other air flotation machines, has no secondary pollution, can recycle the released air, and only needs to supplement trace air.

Small occupied area, convenient installation and low one-time investment. The sewage treatment cost is low, and the main body can be manufactured by adopting a composite steel plate (a stainless steel plate with a lining) according to the requirements of users, so that the service life of equipment is prolonged. The full-automatic operation does not need personnel operation, and the performance is stable, safe and reliable.

The bottom of the cylinder 1 is provided with a plurality of sludge discharge ports 10 for discharging sludge accumulated at the bottom. The top of the cylinder body 1 is provided with an oil collecting cavity 14, an oil collecting cabinet 13 is arranged on the upper side of the oil collecting cavity 14, and an oil drain port 11 and an exhaust port 12 are arranged on the oil collecting cabinet 13.

The above-described embodiments are merely preferred embodiments for fully explaining the present utility model, and the scope of the present utility model is not limited thereto. Equivalent substitutions and modifications will occur to those skilled in the art based on the present utility model, and are intended to be within the scope of the present utility model. The protection scope of the utility model is subject to the claims.

Claims (7)

1. The novel efficient rotary liquid coarse-grain coalescence oil-water separation device is characterized by comprising a barrel and sealing heads at two sides of the barrel, wherein a rotational flow area, a coalescence area and a filtering area are sequentially arranged in the barrel, a water inlet is formed in one side of the sealing head close to the rotational flow area, and a water outlet is formed in one side of the sealing head close to the filtering area;

the cyclone is arranged in the cyclone area and comprises a cyclone cavity, a shrinkage cavity, a tail cone and a tail pipe which are sequentially arranged, an inlet is formed in the upper side surface of the cyclone cavity, a bottom flow port is formed in one side, away from the tail cone, of the tail pipe, and an overflow port is formed in one side, away from the shrinkage cavity, of the cyclone cavity; a bellows polymerizer is arranged in the coalescing region, and a polymeric separator is arranged in the filtering region.

2. The novel high-efficiency hydrocyclone coarse-grained coalescent oil-water separation device according to claim 1, wherein an anti-corrosion coating is arranged on the inner side wall of the cylinder.

3. The novel high-efficiency hydrocyclone coarse-grain coalesced oil-water separation device according to claim 1, wherein a plurality of sludge discharge ports are formed in the bottom of the cylinder.

4. The novel efficient rotary liquid coarse-grained coalescent oil-water separation device according to claim 1, wherein an oil collecting cavity is formed in the top of the cylinder body, an oil collecting cabinet is arranged on the upper side of the oil collecting cavity, and an oil drain port and an air exhaust port are formed in the oil collecting cabinet.

5. The novel high-efficiency hydrocyclone coarse-grained coalescent oil-water separation device according to claim 1, wherein a supporting device is arranged at the bottom of the cylinder.

6. The novel high-efficiency hydrocyclone coarse-grain coalesced oil-water separation device according to claim 1, wherein the bellows polymerizer is made of stainless steel materials.

7. The novel high-efficiency hydrocyclone coarse-grained coalescent oil-water separation device according to claim 1, wherein the operating conditions of the device are as follows: oil content of inlet water: less than or equal to 250ppm; inlet water pressure: 0.4-0.6mpa; residence time: 20min; oil content of effluent: less than or equal to 20ppm; operating pressure: 0.4-0.6mpa; operating temperature: 5-75 ℃; pressure drop: 0.02mpa.