CN219341819U

CN219341819U - Baffling multi-point step release air floatation separation device

Info

Publication number: CN219341819U
Application number: CN202223292494.4U
Authority: CN
Inventors: 王庆吉; 张晓飞; 陈宏坤; 王占生; 谢加才; 杨忠平; 陈曦; 王列
Original assignee: China National Petroleum Corp; CNPC Research Institute of Safety and Environmental Technology Co Ltd
Current assignee: China National Petroleum Corp; CNPC Research Institute of Safety and Environmental Technology Co Ltd
Priority date: 2022-12-08
Filing date: 2022-12-08
Publication date: 2023-07-14
Anticipated expiration: 2032-12-08

Abstract

The utility model is suitable for the technical fields of safety, environmental protection, energy conservation and water conservation, and provides a baffling multipoint cascade release air floatation separation device.

Description

Baffling multi-point step release air floatation separation device

Technical Field

The utility model belongs to the technical field of safety, environmental protection, energy conservation and water conservation, and particularly relates to a baffling multipoint step release air floatation separation device.

Background

Along with the continuous increase of the amount of the wastewater in the operation of the domestic oil and gas field, the existing treatment device has low efficiency, high cost, long process flow, large dosage of the medicament, high cost and easy secondary pollution. Therefore, the treatment efficiency of the operation waste liquid and the water quality and water quantity matching degree of the waste liquid recycling are improved, and the recycling rate of the waste water is improved.

The existing operation waste liquid treatment device mostly adopts a combined process mode, units such as dosing, coagulation, air floatation, baffling sedimentation and the like are combined into a process device for treatment, each treatment step is operated by a separate device, particularly a core air floatation process mostly adopts a single-point air floatation mode, and large space is needed for reaction treatment. For the operation waste liquid with high suspended matters and high viscosity, the dosage of the medicament is greatly increased, the reaction time is prolonged to strengthen the treatment effect, the residence time of the device is long, and the synergistic enhancement capability of the mixing reaction and the destabilization separation is weak. Therefore, there is a need to improve the efficiency of multi-fluid collision coalescence, increase the adhesion of microbubbles, and perform the structural optimization design and integrated innovation integration of the device in the aspects of shallow pool inclined plate coalescence separation, so as to enhance the treatment effect, reduce the occupied area, reduce the waste liquid treatment cost, and adapt to the production requirements of efficient recycling and low-cost treatment of the waste liquid in oilfield operation.

Disclosure of Invention

In view of the above problems, in one aspect, the present utility model provides a baffling multipoint step release floatation separation device, which includes: the micro-bubbles generated by the dissolved air pump are released in the tubular reactor, the primary treatment area and the secondary treatment area respectively.

The primary treatment area and the secondary treatment area are respectively divided into a contact area A, a slag collecting area B, a water distribution area C, a reaction area D, a water collecting area E and a mud collecting area F; the contact area A is separated from the reaction area D by a high-bending baffle plate; the lower part of the contact area is closed.

The reaction zone D is formed by separating a plurality of inclined plates into a plurality of independent small reaction zones.

Preferably, the air dissolving pump is a two-stage air dissolving pump, and the two-stage air dissolving pump respectively generates micro bubbles with different diameters; and microbubbles generated by the dissolved air pump are released in the contact area A in the primary treatment area and the secondary treatment area.

Preferably, the microbubbles are released at contact zone a by a releaser which employs a multi-point release.

Optionally, openings are provided in the primary treatment zone and the secondary treatment zone as discharge ports for dirty oil and scum.

Preferably, it also comprises a slag scraping mechanism.

Compared with the prior art, the utility model has the following beneficial effects:

1. the two-stage microbubble three-stage treatment mode is adopted, the tubular reactor is a primary microbubble release zone, and the microbubble generated by the primary dissolved air pump carries out mixed flow reaction on the medicament and the waste liquid, so that the reaction of the medicament is enhanced, and the utilization rate of the medicament is improved. Microbubbles generated by a primary dissolved air pump in the device body are combined with hydrophobic oil drops in the waste liquid of the primary treatment area to carry out secondary treatment, so as to carry out efficient oil removal. The micro bubbles generated by the secondary dissolved air pump mainly react with the residual fine flocs in the waste liquid in the secondary treatment area to perform tertiary treatment, so that large flocs are formed, and then the flocs are efficiently removed. The device is divided into three main reaction areas by adopting a two-stage micro-bubble three-stage treatment mode, so that the treatment capacity of waste liquid is greatly improved.

2. The device body is divided into two treatment areas, wherein the primary treatment area mainly acts as oil removal, and the secondary treatment area mainly acts as slag removal. Waste in the primary treatment area is discharged into a sewage tank, and waste in the secondary treatment area is discharged into a sludge tank. The device body adopts a two-stage treatment mode, dirty oil and sludge are respectively discharged, the waste liquid treatment efficiency is improved, and the waste treatment difficulty is reduced.

3. The device body adopts two treatment areas and a two-stage micro-bubble step release treatment mode, so that the removal efficiency of oil, polymer, flocs and the like in the waste liquid is higher, and the treatment efficiency is 30% higher than that of the single treatment mode.

4. By adopting the multipoint release technology, each contact area of the embodiment adopts the 5-point release technology, and compared with the traditional air release head for single-point release, the air floatation efficiency can be improved by more than 40%.

5. The dissolved air multipoint release port is positioned at the lower part of the contact area in the two treatment areas, and the lower part of the contact area is closed. Each release port can form 1 mixed flow area, adjacent mixed flow areas are mutually staggered and collided to form a compound mixed flow effect, the whole contact area is full of the mixed flow effect, the mutual collision of micro bubbles and colloid particles in waste liquid is accelerated, colloid breaking and destabilization are carried out, and the micro bubbles and particles in operation waste liquid are fully mixed to form larger flocs.

6. Each dissolved gas release pipe of the secondary dissolved gas release pipeline of the primary treatment area is provided with a release valve independently. The three-stage dissolved gas release pipeline of the secondary treatment area can be provided with a total control gas release valve, and each dissolved gas release pipeline can be provided with a gas release valve independently. When the suspended matters, oil content and the like of the waste liquid in the inlet operation are increased, the release valve of the secondary dissolved gas release pipeline can be adjusted to strengthen the release strength of the secondary dissolved gas, and the removal amount of the micro bubbles in the secondary dissolved gas release to the oil and suspended matters in the waste water is increased. The method does not increase the dosage of the medicament aiming at complex operation waste liquid treatment, and reduces the operation cost.

7. The utility model combines the multi-point dissolved gas release and the multi-layer baffle plate foldback, the device contact area, the reaction area and the water outlet area are all separated by the baffle plates, and the multi-layer baffle plate can effectively remove the flocs by sedimentation.

8. The multipoint dissolved air release technology adopted by the utility model is suitable for a rectangular structure device and also can be used for a vertical flow type rectangular structure air floatation separation device.

9. The multi-layer baffle plates are obliquely arranged, and the inclined plate and the X-axis form an included angle of 60-80 degrees, so that flocs are facilitated to settle.

In summary, the utility model integrates the processes of micro-bubble multipoint release-step flocculation-foldback laminar sedimentation and the like into a set of device, and the utility model invents a rapid destabilization and separation cooperative mechanism of micro-bubbles on a polymer waste liquid system, thereby forming a short-flow polymer-containing waste liquid treatment system, strengthening the treatment effect of suspended matters and polymers in operation waste liquid, reducing the size of the device and reducing the occupied area.

Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model may be realized and attained by the structure particularly pointed out in the written description and drawings.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic representation of the various reaction zones of the apparatus of the present utility model.

Fig. 2 is a schematic front view of the apparatus and flow of the present utility model.

Fig. 3 is a schematic top view of an inventive apparatus and flow chart.

FIG. 4 is a schematic illustration of the waste treatment in the reaction zone of the inventive apparatus.

Fig. 5 is a cross-sectional view of the waste discharge of the inventive apparatus.

Wherein, A. The contact area; B. a slag collecting area; C. a water distribution area; D. a reaction zone; E. a water collection area; F. a mud collecting area; G. and a water outlet area.

1. A tubular reactor; 2. a device body; 3. a slag scraping machine; 4. a water outlet regulating weir; 5. discharging the water tank; 6. a water outlet pipe; 7. a return pipe; 8. a secondary dissolved air pump; 9. a third-stage dissolved air pipeline; 10. a support leg; 11. a discharge valve; 12. a primary dissolved air pump; 13. a primary dissolved air pipeline; 14. a high bending baffle; 15. a sloping plate; 16. a high bending partition plate; 17. a middle partition plate; 18. a release valve I; 19. a first dissolved air branch; 20. a second gas dissolving branch; 21. a secondary dissolved air pipeline; 22. a release valve II; 23. a release; 24. a dirty oil tank; 25. a sludge tank; 26. and a sewage disposal sloping plate.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The baffling multi-point step release air floatation separation device adopts a multi-process integration technology, innovatively designs a step multi-point release microbubble gel breaking technology, and can realize the efficient removal of oil, suspended matters and polymers. The utility model is further described below with reference to the accompanying drawings.

As shown in figures 1-5, the device adopts a horizontal flow type rectangular structure, and the whole lower part adopts a cone shape. The components of the device are arranged in the cylinder body, and the lower part of the device is provided with supporting legs for ensuring the stability of the device. The device adopts mechanical slag scraping, and a slag collecting area is positioned at the upper part of the water distribution area. The lower part of the cone is provided with a mud collecting area and a mud discharging opening.

The device is divided into two treatment areas, namely a primary treatment area and a secondary treatment area, and each treatment area is divided into a contact area A, a slag collecting area B, a water distribution area C, a reaction area D, a water collecting area E and a mud collecting area F.

The device contact area is separated from the reaction area D by adopting a high-bending baffle plate 14, so that the reaction time of the contact area is increased, the lower part of the contact area is closed, the reaction time is increased, and the channeling is prevented.

The reaction zone D of the device is formed by separating a plurality of sloping plates 15 into a plurality of independent small reaction zones, the angle between the sloping plates and the X-axis is 60 degrees to 80 degrees, and the sloping plates are fixed with the inner wall of the cylinder body of the device.

The utility model also comprises a tubular reactor 1, a two-stage dissolved air pump, and a dissolved air pipeline and a release valve which are connected with the dissolved air pump, wherein microbubbles generated by the dissolved air pump, the dissolved air pipeline and the release valve are used for carrying out three-stage release on the waste liquid.

Preferably, a two-stage dissolved air pump is adopted to carry out a step multipoint dissolved air release technology, and the two-stage dissolved air pump respectively generates micro bubbles with different diameters. The primary dissolved air pump generates 40-60 micron bubbles, and the secondary dissolved air pump generates 20-40 micron bubbles. The micro bubbles with different diameters are adopted to react with the waste liquid, and the step release is carried out according to the steps from large to small.

The front end of the device is provided with a tubular reactor 1, and the flocculation mixing agent is added in the tubular reactor to perform primary reaction.

The device adopts a three-level multipoint release technology, primary micro-bubble gas-dissolved water release is carried out in the tubular reactor, secondary micro-bubble gas-dissolved water release is carried out in the contact area A of the primary treatment area, and three-level micro-bubble gas-dissolved water release is carried out in the contact area A of the secondary treatment area.

The first-stage gas dissolving pipeline and the second-stage gas dissolving pipeline of the device are all required to be provided with a gas releasing valve independently. The three-stage air dissolving pipelines can be provided with a total control air release valve, and each air dissolving pipeline can be provided with an air release valve independently.

The air dissolving pump comprises a pressure pump and an air dissolving tank, an air inlet of the pressure pump is communicated with the atmosphere, a water inlet of the pressure pump is communicated with one end of a clear water return pipeline, an air dissolving outlet of the pressure pump is communicated with the bottom of the pressure tank, the side surface of the air dissolving tank is communicated with one end of the air dissolving outlet pipeline, and a safety valve is arranged at the top of the air dissolving tank.

The dissolved air pump dissolved air outlet pipeline comprises 2 stop valves, check valves and pressure gauges.

The device body adopts the toper structure, is favorable to collecting mud, and the device adopts gravity mud discharge, and two treatment areas establish the mud valve respectively, and mud is discharged after gathering by two treatment area mud valves.

The device has the advantages that the sewage tank and the sludge tank are respectively arranged on two sides of the body, the appearance is the same as that of the body, and the upper part is rectangular and the lower part is conical. The top of the contact area of the first-stage treatment area of the device body is provided with openings which are used as discharge openings of dirty oil and scum, and the two discharge openings are opposite. During operation, dirty oil or scum is squeezed into the dirty oil tank and the sludge tank by the scum scraper. The inlet of the sewage tank and the inlet of the sludge tank are provided with inclined plates, so that sewage oil or sludge can flow in conveniently.

The bottom of the sewage tank and the bottom of the sludge tank are provided with discharge openings, and a discharge valve is arranged. The sewage tank, the sludge tank discharge valve and the two sludge discharge valves of the device body are gathered and then discharged. The four valves are uniformly distributed around the bottom of the device, so that the appearance is attractive, and the operation is convenient.

During operation, the waste liquid enters the tubular reactor 1 first, and the reagent is added and reacted in the tubular reactor 1. The tubular reactor 1 is a primary microbubble release area, and microbubbles generated by the primary dissolved air pump 12 enter the tubular reactor 1 in two ways through the primary dissolved air release pipeline 13, so that the medicament and the waste liquid are subjected to a first mixing reaction, the action effect of the medicament is enhanced, the microbubbles are fully contacted with suspended matters in the operation waste liquid, and the polymer is subjected to primary gel breaking. The first-stage dissolved air release pipeline 13 further comprises a release valve I18, a first dissolved air branch 19 and a second dissolved air branch 20.

Then the operation waste liquid enters a contact area A in a primary treatment area of the device body 2, high-speed water gas generated by a primary dissolved gas pump 12 in the contact area A enters five ways through a secondary dissolved gas release pipeline 21 and a releaser 23, and is mixed with the operation waste liquid for reaction, so that secondary microbubbles are fully contacted with oil and part of suspended matters in the operation waste liquid, and the polymer is broken. The front end of the releaser 23 is provided with a release valve 22, and by reducing the opening of the release valve 22, the pressure of the dissolved air water can be increased, the release strength of the secondary dissolved air water can be increased, and the operation can be adopted when the content of suspended matters, oil and the like of working waste liquid is increased, so that the dosage is reduced. The contact zone is separated from the reaction zone D by a highly curved baffle 14. The wastewater after preliminary reaction in the contact zone A carries micro bubbles to enter a reaction zone D through a water distribution zone C, and the reaction zone D consists of a plurality of inclined plates 15 which are obliquely arranged. The wastewater containing the microbubbles is subjected to gel breaking and flocculation reaction in the water distribution area C and the reaction area D, floating oil scum is generated by sedimentation action of the sloping plate 15 and rises to the slag collecting area B, and is discharged to the dirty oil tank 24 for collection by the slag scraper 3 through the blowdown sloping plate 26. The large-particle flocs are settled by the inclined plate 15 and then concentrated in a sludge collecting area F, wherein the sludge collecting area F is of a conical structure, and the sludge is discharged from the device through the sludge discharge valve 11. The treated waste liquid moves through the water collecting area E to the water outlet area G which is separated from the reaction area D by a high-bending partition plate 16 and enters the contact area A of the secondary treatment area.

The waste liquid after the first-stage treatment zone is treated, most of oil and floc are removed, and the waste liquid enters the second-stage treatment zone and reacts with high-speed water and gas generated by the second-stage dissolved air pump 8 in the contact zone A. The dissolved air water enters through the three-stage dissolved air release pipeline 9 and the releaser 23 in five ways and is mixed with the suspended matters remained in the operation waste liquid for reaction, and the technological process of the secondary treatment area is consistent with that of the primary reaction area. The waste liquid treated by the secondary reaction zone enters the water outlet tank 5 through the water outlet zone G of the secondary treatment zone, and is discharged out of the device through the water outlet pipe 6, and part of the water outlet flows back to the two-stage dissolved air pump through the return pipe 7 to serve as water inlet of the dissolved air pump. Wherein the outlet tank 5 further comprises an outlet regulating weir 4. The floating oil scum is generated to rise to a slag collecting area B, and is discharged to a sludge tank 25 for collection by a slag scraping machine 3 through a sewage draining sloping plate 26. The large-particle flocs are settled by the inclined plate 15 and then concentrated in a mud collecting area F, and the mud collecting area F is of a conical structure. All sludge and dirty oil are collected by the discharge valve 11 and discharged, and one discharge valve can be independently opened and closed to independently discharge the waste.

Although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. The utility model provides a baffling multiple spot step release air flotation separation device which characterized in that includes:

the micro-bubbles generated by the dissolved air pump are released in the tubular reactor, the primary treatment area and the secondary treatment area respectively.

2. The baffling multipoint gradient release floatation separation device according to claim 1, wherein the primary treatment area and the secondary treatment area are respectively divided into a contact area A, a slag collection area B, a water distribution area C, a reaction area D, a water collection area E and a mud collection area F.

3. The baffled multi-point step release floatation separation device of claim 2, wherein the contact zone a is separated from the reaction zone D by a high-bending baffle.

4. A baffling multipoint step release flotation separation device according to claim 2 or 3 wherein the lower portion of the contact zone is closed.

5. The baffled multi-point cascade release flotation separation device of claim 2 wherein the reaction zone D is comprised of a plurality of inclined plates separated into a plurality of individual small reaction zones.

6. The baffling multi-point step release air floatation separation device according to claim 1, wherein the dissolved air pump is a two-stage dissolved air pump, and the two-stage dissolved air pump respectively generates microbubbles with different diameters.

7. The baffling multi-point step release floatation separation device according to claim 2, wherein microbubbles generated by the dissolved air pump are released in a contact area A in a primary treatment area and a secondary treatment area.

8. The baffling multi-point cascade release flotation separation apparatus of claim 7 wherein microbubbles are released at contact zone a by a releaser which employs multi-point release.

9. The baffling multi-point step release floatation separation device according to claim 1, wherein openings are arranged in the primary treatment area and the secondary treatment area and are used as discharge ports of dirty oil and scum.

10. The baffling multi-point step release floatation separation device of claim 1, further comprising a slag scraping mechanism.