CN117902677A - Device and method for removing oil and suspended solids in water - Google Patents
Device and method for removing oil and suspended solids in water Download PDFInfo
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- CN117902677A CN117902677A CN202211234690.8A CN202211234690A CN117902677A CN 117902677 A CN117902677 A CN 117902677A CN 202211234690 A CN202211234690 A CN 202211234690A CN 117902677 A CN117902677 A CN 117902677A
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- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The application provides a processing device and a processing method for removing oil and suspended solids in water, wherein the device comprises the following components: regulating the micro-vortex coalescence oil removing section and the sedimentation section; a micro-vortex coalescer containing a micro-vortex coalescing element is arranged at the upstream of the micro-vortex coalescence oil removal regulation section; and a micro-vortex reactor containing micro-vortex reaction balls is arranged at the upstream of the sedimentation section and at the downstream of the micro-vortex regulating coalescence deoiling section. Compared with the traditional process, the oil removal efficiency and suspended solid removal efficiency of the application are greatly improved. The device provided by the application combines the functions of micro-vortex coalescence degreasing, natural degreasing adjustment, micro-vortex reaction, sedimentation, buffering and the like, replaces a traditional process three-level structure, changes a traditional plane arrangement mode, changes multi-level treatment equipment from a plane to a three-dimensional one, and solves the problems of long treatment flow, large occupied area, easy suction and bias flow of suspended solids, easy blockage of coalescence materials and the like of produced water of an oil-gas field.
Description
Technical Field
The present invention relates to, but is not limited to, the field of oilfield gas field produced water treatment, and in particular, but not limited to, a treatment apparatus and method for removing oil and suspended solids.
Background
In the oil and gas field produced water treatment process, the oil removing section of most produced water treatment stations mainly adopts a natural oil removing, coagulation oil removing and buffering process. The oil removal and suspended solid removal process method has the problems of low oil removal efficiency, poor reaction effect, poor suspended solid removal effect and the like, and generally adopts three-stage treatment structures, and has multiple stages and large occupied area. Chinese patent (an oil removing device, ZL 201721134145.6) discloses a multifunctional oil removing device, but the oil removing device has the following problems: firstly, the device adopts an upper structure, a middle structure and a lower structure, is not easy to realize structurally, and is difficult to manufacture and construct; the first oil removing area of the equipment adopts gravity sedimentation oil removing, the section can only remove floating oil with the grain diameter of more than or equal to 100 mu m, so that the oil removing effect of the section is poor, the effluent oil content of the section is usually about 150mg/L, a large amount of oil grains with the grain diameter of less than 100 mu m in water enter the second oil removing area, so that the dosage is larger, and the produced hazardous wastes such as dirty oil and sludge are more; thirdly, the device adopts a vertical flow mode, and the water distribution and collection system is complex and is easy to be blocked and deflected. And fourthly, the equipment is not resistant to load impact, and because the water distribution bell mouth of the second oil removing area of the equipment is upward, when the water quantity changes, the impact on the upper oil layer is larger, so that oil and part of suspended matters reenter water, and the oil removing and suspended solid removing effects are poor. The existing coalescing oil removal technology for the produced water treatment mostly adopts anthracite, ceramsite, serpentine and other fillers, and has the problem that the fillers are easy to block, so that the application of the technology in oil and gas fields is limited.
Disclosure of Invention
The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.
In order to solve the problems of low oil removal efficiency, poor reaction effect, poor suspended solid removal effect, large occupied area and the like of the existing oil and gas field produced water oil removal and suspended solid removal process method, the application provides an integrated oil removal and suspended solid removal treatment device which combines the functions of micro-vortex coalescence oil removal, oil removal adjustment, micro-vortex reaction, sedimentation, buffering and the like into a whole and can replace a three-stage treatment structure of the traditional process.
The application provides a treatment device for removing oil and suspended solids in water, which comprises the following components:
Regulating the micro-vortex coalescence oil removing section and the sedimentation section;
A micro-vortex coalescer is arranged at the upstream of the regulating micro-vortex coalescence oil removing section and comprises a micro-vortex coalescence element which is configured to enlarge the aggregation of oil and suspended solids in the oily sewage to be treated by utilizing the micro-vortex effect;
A micro-vortex reactor is arranged at the upstream of the sedimentation section and at the downstream of the regulating micro-vortex coalescence deoiling section, and comprises micro-vortex reaction balls which are configured to be capable of performing micro-vortex coalescence reaction;
The micro-vortex adjusting coalescence degreasing section is configured to adjust the micro-vortex action to separate oil and suspended solids in the oily sewage to be treated from water;
one end of the micro-vortex coalescer is communicated with a water inlet pipe for providing the oily sewage to be treated, and the other end of the micro-vortex coalescer is communicated with one end of the regulating micro-vortex coalescence deoiling section; the other end of the regulating micro-vortex coalescence deoiling section is communicated with one end of the micro-vortex reactor, and the other end of the micro-vortex reactor is communicated with the sedimentation section.
In one embodiment of the present application, the processing device further includes a tank;
The tank body is of a vertical structure, and is divided into the micro-vortex adjusting coalescence oil removing section and the sedimentation section which are not communicated with each other, wherein the upper part of the tank body is provided with the micro-vortex adjusting coalescence oil removing section; the lower part of the tank body is a sedimentation section.
In one embodiment provided by the application, the outlet of the regulating micro-vortex coalescence deoiling section is arranged near the inner side wall of the tank body, and the regulating micro-vortex coalescence deoiling section is communicated with the micro-vortex reactor through the outlet.
In one embodiment provided by the application, the water inlets of the regulating micro-vortex coalescence deoiling sections are symmetrically arranged, and the water inlets of the regulating micro-vortex coalescence deoiling sections are overlapped with the axis of the regulating micro-vortex coalescence deoiling sections.
In one embodiment of the application, the water inlets of the plurality of settling sections are symmetrically arranged, and the axes of the water inlets of the plurality of symmetrically arranged settling sections are coincident with the axes of the settling sections.
In one embodiment of the application, the outlet of the micro-vortex coalescence deoiling section is a first annular circular tube, and an opening capable of allowing liquid to flow in is arranged at the lower end of the first annular circular tube; and the liquid in the regulating micro-vortex coalescence deoiling section enters the micro-vortex reactor through the first annular circular pipe.
In one embodiment of the application, the outlet of the sedimentation section is arranged close to the inner side wall of the tank.
In one embodiment of the application, the outlet of the sedimentation section is a second annular circular tube, and an opening is arranged at the lower end of the second annular circular tube; the sedimentation section flows out of the treatment device for removing oil and suspended solids in the water through the second annular circular tube.
In one embodiment provided by the application, the regulating micro-vortex coalescence deoiling section is provided with a first drain outlet and a first oil outlet;
The first oil outlet is positioned above the first annular circular pipe, and the first annular circular pipe is positioned above the first sewage draining outlet.
In one embodiment provided by the application, the sedimentation section is provided with a second sewage outlet and a second oil outlet;
the second oil outlet is positioned above the second annular circular pipe, and the second annular circular pipe is positioned above the second sewage draining outlet.
In one embodiment of the present application, the micro-vortex coalescing element is a micro-vortex coalescing ball filled with coalescing filler, the micro-vortex coalescing element is a hollow structure comprising:
a porous housing; the porous shell is provided with a diversion hole for communicating the inside and the outside of the micro-vortex coalescence element;
Coalescing filler disposed in the hollow structure,
The longest diameter of the deflector hole is smaller than the shortest diameter of the coalescing filler.
In one embodiment of the present application, the diversion holes occupy 30% to 80% of the area of the porous shell.
In one embodiment provided by the present application, the micro-vortex coalescing element is a sphere; in one embodiment provided herein, the ratio of the outer diameter of the micro-vortex coalescing element to the thickness of the porous shell is (100 to 300): (1 to 6); in one embodiment provided herein, the ratio of the outer diameter of the micro-vortex coalescing element to the diameter of the deflector aperture is (100 to 300): (15 to 40).
In one embodiment provided by the present application, a plurality of coalescing fillers in one of the micro-vortex coalescing elements has a space of rotational movement within the porous housing.
In one embodiment of the present application, the porous shell may be made of any one or more of ABS material, modified ABS material, polypropylene material, modified polypropylene material, polyethylene and other plastic materials.
In one embodiment of the present application, the coalescing filler may be any one or more of ABS material, modified ABS material, polypropylene material, modified polypropylene material, polyethylene and other plastic materials.
In one embodiment provided herein, the ratio of the outer diameter of the micro-vortex coalescing element to the outer diameter of the coalescing filler is 1 (0.125 to 0.5).
In one embodiment provided herein, the micro-vortex coalescing element may have an outer diameter of 100mm to 300mm.
In one embodiment provided by the present application, the coalescing filler may have an outer diameter of 25mm to 75mm. In one embodiment provided by the present application, the coalescing filler has an outer diameter greater than the deflector hole diameter.
In one embodiment provided by the present application, the coalescing packing is selected from any one or more of pall ring packing, step ring packing, saddle ring packing, multi-faceted hollow sphere packing, porous sphere packing, raschig ring packing, iso-saddle ring packing, and gear ring packing.
In one embodiment provided herein, the micro-vortex coalescing element has an average density of material of 0.9 x 10 3kg/m3 to 1.1 x 10 3kg/m3.
In one embodiment of the application, the number of the micro-vortex coalescers is one or more, and when the number of the micro-vortex coalescers is more than two, the water outlet of the most downstream micro-vortex coalescers is communicated with the water inlet of the natural oil removal section;
the number of the micro-vortex reactors is one or more than two, and when the number of the micro-vortex reactors is more than two, the water outlet of the most downstream micro-vortex reactor is communicated with the water inlet of the sedimentation section.
In one embodiment of the present application, the water inlet of the micro vortex reactor further comprises a medicament inlet;
In one embodiment provided by the application, the agent is selected from any one or more of a demulsifier, a coagulant, and a flocculant.
In one embodiment provided by the present application, the residence times of the micro-vortex coalescer and the micro-vortex reactor are each independently selected from 2min to 20min, preferably, residence times are each independently selected from 5min to 10min;
the micro-vortex coalescer and the micro-vortex reactor are each independently selected from 10m/h to 360m/h of empty bed flow rate, preferably each independently selected from 25m/h to 90m/h;
In one embodiment provided by the application, the hydraulic residence time of the regulating micro-vortex coalescence deoiling section is 30min to 180min;
in one embodiment provided by the application, the hydraulic retention time of the settling section is 30min to 120min.
The beneficial effects of the application are as follows:
Compared with the traditional process, the oil removal efficiency and suspended solid removal efficiency of the application are greatly improved. Solves the problems of low oil removal efficiency, poor reaction effect, poor suspended solid removal effect and the like in the traditional process. The device provided by the application combines the functions of micro-vortex coalescence degreasing, natural degreasing adjustment, micro-vortex reaction, sedimentation, buffering and the like, replaces a traditional process three-level structure, changes a traditional plane arrangement mode, changes a multi-level treatment device from a plane to a three-dimensional one, solves the problems of long treatment flow, large occupied area, easy suction and bias flow of suspended solids, easy blockage of coalescence materials and the like of the produced water of an oil-gas field, and has the characteristics of short flow and small occupied area, and the occupied area can be reduced by more than 40%. The oil content and suspended solids of the effluent of the device can be reduced to below 20 mg/L. Compared with ZL201721134145.6, the application adjusts the water outlet of the micro-vortex coalescence section to be 50mg/L, adjusts the oil of the micro-vortex coalescence section to be recyclable, and the produced water per side is more than 0.1kg of recovered oil, reduces the amount of dirty oil and sludge by 0.1kg, reduces the dosage by more than 30%, and saves the treatment cost by about 0.3 yuan/m 3 for single water; the device has solved the difficult realization of structure in ZL201721134145.6 patent, manufacturing and construction difficulty, and the dosage is great, the dangerous waste such as sump oil mud that produces is more, and water distribution, water collection system complicacy just easily appear blocking up, drift and problem such as not resistant load impact.
Additional features and advantages of the application 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 application. Other advantages of the application may be realized and attained by the structure particularly pointed out in the written description.
Drawings
The accompanying drawings are included to provide an understanding of the principles of the application, and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain, without limitation, the principles of the application.
Fig. 1 is a schematic view of an integrated oil and suspended solids removal treatment apparatus according to an exemplary embodiment of the present application.
Reference numerals: 1. a tank body; 2. regulating a micro-vortex coalescence deoiling section; 3. a sedimentation section;
4-1, a section of micro-vortex coalescer; 4-2, a two-stage micro-vortex coalescer; 4-3, a connecting pipe between two sections of micro-vortex coalescers; 4101. a section of micro-vortex coalescer bottom grid mesh; 4102. a first micro-vortex coalescing element; 4201. two sections of micro-vortex coalescing element bottom grids; 4202. a second micro-vortex coalescing element; 4203. a first water distribution hole; 4102-1, flow guide holes; 4102-2, coalescing filler; 4102-3, porous shell;
5-1, a section of micro-vortex reactor; 5-2, a two-stage micro-vortex reactor; 5-3, connecting pipes between two sections of micro-vortex reactors; 5101. a section of grid mesh at the bottom of the micro-vortex reactor; 5102. a first micro-vortex reaction sphere; 5201. a grid mesh at the bottom of the two-section micro-vortex reactor; 5202. a second micro-vortex reaction sphere; 5203. a second water distribution hole;
6. A water inlet pipe;
7. Regulating a micro-vortex coalescence deoiling section water collecting device; 7101. regulating a top baffle plate of the micro-vortex coalescence deoiling section water collecting device; 7102. adjusting an annular perforated pipe of the micro-vortex coalescence deoiling section water collecting device; 7103. regulating a water collecting branch pipe of a water collecting device of the micro-vortex coalescence deoiling section; 7104. regulating a baffle plate at the lower part of the micro-vortex coalescence deoiling section water collecting device; 7105. regulating a water collecting main pipe of a water collecting device of the micro-vortex coalescence deoiling section;
8. adjusting a connecting pipe between the micro-vortex coalescence degreasing section and the micro-vortex reactor; 9. regulating a micro-vortex coalescence deoiling section bottom plate; 10. a chute;
11. A sedimentation section water collecting device; 11101. a baffle plate at the top of the sedimentation section water collecting device; 11102. annular perforated pipe of sedimentation section water collecting device; 11103. a water collecting branch pipe of the sedimentation section water collecting device; 11104. a baffle plate at the lower part of the sedimentation section water collecting device; 11105. a settling section water collecting device water collecting main pipe;
12. A water outlet pipe; 13. regulating an oil collecting groove of the micro-vortex coalescence oil removing section; 14. regulating an oil collecting pipe of a micro-vortex coalescence oil removing section; 15. annular perforation oil receiving pipe of sedimentation section; 16. an oil collecting pipe of the sedimentation section; 17. a first section of micro-vortex coalescer sludge discharge pipe, 18, a second section of micro-vortex coalescer sludge discharge pipe; 19. regulating a micro-vortex coalescence oil removal section mud discharge pipe; 20. a sedimentation section sludge discharge pipe; 21. a section of sludge discharge pipe of the micro-vortex reactor; 22. a two-stage micro-vortex reactor sludge discharge pipe; 23. coagulant adding port; 24. and a flocculating agent adding port.
Fig. 2 is a partially enlarged schematic illustration of the conditioning micro-vortex coalescence deoiling stage water collector 7 and the settling stage water collector 11.
Fig. 3 is a schematic plan view of the regulating micro-vortex coalescence deoiling stage water collecting device 7 and the sedimentation stage water collecting device 11.
Fig. 4 is an enlarged schematic view of a portion of the lower baffle 7104 of the regulating micro-vortex coalescing oil removal stage water collector and the lower baffle 11104 of the settling stage water collector.
FIG. 5 is a schematic view of a micro-vortex coalescing element.
FIG. 6 is a schematic illustration of packing within a cross section of a micro-vortex coalescing element.
Fig. 7 is a schematic view of a porous housing.
FIG. 8 is a schematic diagram of a micro-vortex reaction ball.
Detailed Description
The following describes embodiments of the present application in detail for the purpose of making the objects, technical solutions and advantages of the present application more apparent. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be arbitrarily combined with each other.
FIG. 1 is a schematic diagram of an integrated oil removal and suspended solids removal treatment device. Fig. 2 is a partially enlarged schematic illustration of the conditioning micro-vortex coalescence deoiling stage water collector 7 and the settling stage water collector 11. Fig. 3 is a schematic plan view of the regulating micro-vortex coalescence deoiling stage water collecting device 7 and the sedimentation stage water collecting device 11. Fig. 4 is an enlarged schematic view of a portion of the lower baffle 7104 of the regulating micro-vortex coalescing oil removal stage water collector and the lower baffle 11104 of the settling stage water collector. FIG. 5 is a schematic view of a micro-vortex coalescing ball. FIG. 6 is a schematic illustration of the packing inside a cross section of a micro vortex coalescing ball. FIG. 7 is a schematic view of a micro-vortex coalescing sphere shell. FIG. 8 is a schematic diagram of a micro-vortex reaction ball.
As shown in fig. 1 to 8, an embodiment of the present application provides a treatment apparatus for removing oil and suspended solids in water, including: regulating the micro-vortex coalescence deoiling section 2 and the sedimentation section 3;
A micro-vortex coalescer is arranged at the upstream of the regulating micro-vortex coalescence oil removing section 2 and comprises a micro-vortex coalescence element which is configured to enlarge the aggregation of oil and suspended solids in the oily sewage to be treated by utilizing the micro-vortex effect;
A micro-vortex reactor is arranged at the upstream of the sedimentation section 3 and at the downstream of the regulating micro-vortex coalescence deoiling section 2, and comprises micro-vortex reaction balls which are configured to be capable of performing micro-vortex coalescence reaction;
The micro-vortex adjusting coalescence degreasing section 2 is configured to adjust the micro-vortex action to separate oil and suspended solids in the oily sewage to be treated from water;
One end of the micro-vortex coalescer is communicated with a water inlet pipe for providing the oily sewage to be treated, and the other end of the micro-vortex coalescer is communicated with one end of the regulating micro-vortex coalescence deoiling section 2; the other end of the regulating micro-vortex coalescence deoiling section 2 is communicated with one end of the micro-vortex reactor, and the other end of the micro-vortex reactor is communicated with the sedimentation section 3.
In the description of the present application, the terms "upstream" and "downstream" are distinguished by the flow path of the oily wastewater to be treated in the treatment device for removing oil and suspended solids in said water, upstream and downstream.
Illustratively, as shown in FIG. 1, the treatment device further comprises a tank 1;
the tank body 1 is of a vertical structure, and is divided into the regulating micro-vortex coalescence oil removing section and the sedimentation section which are not communicated with each other, wherein the upper part of the tank body 1 is provided with a regulating micro-vortex coalescence oil removing section 2; the lower part of the tank body 1 is provided with a sedimentation section 3.
Illustratively, as shown in fig. 1, the water inlets (i.e., the first water distribution holes 4203) of the plurality of the regulated micro-vortex coalescing oil removal segments 2 are symmetrically disposed, and illustratively, the axes of the plurality of the water inlets of the symmetrically disposed regulated micro-vortex coalescing oil removal segments 2 and the axis of the regulated micro-vortex coalescing oil removal segments 2 may coincide.
Illustratively, as shown in fig. 1, the water inlets (i.e., the second water distribution holes 5203) of the plurality of settling sections 3 are symmetrically arranged, and the axes of the water inlets of the symmetrically arranged plurality of settling sections 3 coincide with the axes of the settling sections 3.
Illustratively, as shown in FIG. 1, the outlet of the conditioning micro-vortex coalescing oil removal section 2 is disposed proximate to the inner sidewall of the tank 1. The outlet of the regulating micro-vortex coalescence deoiling section 2 is a first annular circular tube (namely a regulating micro-vortex coalescence deoiling section water collecting device 7), and the lower end of the first annular circular tube is provided with an opening which can enable liquid to flow in; the liquid in the regulating micro-vortex coalescence deoiling section 2 enters the micro-vortex reactor through the first annular circular tube.
For example, the first circular pipe may be set into a pipe with other shape, or the first circular pipe is not involved, and when the water level reaches the water collecting branch pipe 7103 of the water collecting device of the micro vortex coalescence deoiling section, the water enters the water collecting main pipe 7105 of the water collecting device of the micro vortex coalescence deoiling section and flows out downstream.
Illustratively, as shown in fig. 1, the outlet of the sedimentation section 3 is provided near the inner side wall of the tank 1. The outlet of the sedimentation section is a second annular circular pipe (sedimentation section water collecting device 7), and an opening is formed in the lower end of the second annular circular pipe; the sedimentation section 3 flows out of the treatment device for removing oil and suspended solids in the water through the second annular circular tube.
For example, the second circular pipe may be formed into a pipe with another shape, or the second circular pipe may not be involved, and when the water level reaches the water collecting branch pipe 11103 of the water collecting device of the micro vortex coalescence deoiling section, the water enters the water collecting main pipe 11105 of the water collecting device of the micro vortex coalescence deoiling section and flows out downstream.
Illustratively, as shown in fig. 1, the regulating micro-vortex coalescence deoiling section is provided with a first drain outlet (i.e. a drain outlet communicated with the mud pipe 19 of the regulating micro-vortex coalescence deoiling section) and a first oil outlet (i.e. the oil receiving groove 13 of the regulating micro-vortex coalescence deoiling section, the oil receiving groove 13 of the regulating micro-vortex coalescence deoiling section may be annular circular tube shape);
The first oil outlet is positioned above the first annular circular pipe, and the first annular circular pipe is positioned above the first sewage draining outlet.
Illustratively, as shown in fig. 1, the settling section is provided with a second drain (i.e., a drain in communication with the settling section sludge discharge pipe 20) and a second oil outlet (i.e., a settling section annular perforated oil receiving pipe 15);
the second oil outlet is positioned above the second annular circular pipe, and the second annular circular pipe is positioned above the second sewage draining outlet.
Illustratively, as shown in FIG. 2, the opening of the first circular tube is located at the lower portion of the first circular tube for the flow of liquid into the first circular tube; the opening of the second annular circular tube is positioned at the lower part of the second annular circular tube and is used for allowing liquid to flow into the second annular circular tube;
illustratively, as shown in FIGS. 5-7, the micro-vortex coalescing element is a micro-vortex coalescing ball (i.e., porous shell 4102-3, which may be identical to a micro-vortex reaction ball) containing coalescing filler 4102-2, the micro-vortex coalescing element is a hollow structure comprising:
porous housing 4102-3; the porous housing 4102-3 is provided with flow guide holes 4102-1 communicating the inside and outside of the micro vortex coalescing element;
Coalescing filler 4102-2, the coalescing filler 4102-2 being disposed in the hollow structure,
The longest diameter of the baffle holes 4102-1 is less than the shortest diameter of the coalescing filler 4102-2.
Illustratively, the flow directing holes 4102-1 comprise 30% to 80% of the area of the porous housing 4102-3.
Illustratively, the micro-vortex coalescing element is a sphere; in one embodiment provided herein, the thickness ratio of the outer diameter of the micro-vortex coalescing element to the porous housing 4102-3 is (100 to 300): (1 to 6); illustratively, the ratio of the outer diameter of the micro-vortex coalescing element to the diameter of the flow directing aperture 4102-1 is (100 to 300): (15 to 40).
Illustratively, a plurality of coalescing fillers 4102-2 in one of the micro-vortex coalescing elements has space for rotational movement within the porous housing 4102-3.
Illustratively, the porous housing 4102-3 may be made of any one or more of an ABS material, a modified ABS material, a polypropylene material, a modified polypropylene material, and a polyethylene plastic material.
Illustratively, the coalescing filler 4102-2 may be made of any one or more of an ABS material, a modified ABS material, a polypropylene material, a modified polypropylene material, and a polyethylene plastic material.
Illustratively, the ratio of the outer diameter of the micro-vortex coalescing element to the outer diameter of the coalescing filler 4102-2 is 1 (0.125 to 0.5).
Illustratively, the micro-vortex coalescing element may have an outer diameter of 100mm to 300mm.
Illustratively, the coalescing filler 4102-2 may have an outer diameter of 25mm to 75mm. Illustratively, as shown in FIG. 5, the coalescing filler has an outer diameter that is greater than the diameter of the baffle holes 4102-1.
Illustratively, the coalescing packing 4102-2 is selected from any one or more of a pall ring packing, a step ring packing, a saddle ring packing, a multi-faceted hollow sphere packing, a porous sphere packing, a raschig ring packing, an iso-saddle ring packing, and a gear ring packing.
Illustratively, the material average density of the micro-vortex coalescing element is from 0.9×10 3kg/m3 to 1.1×10 3kg/m3.
In one embodiment provided by the application, the number of the micro-vortex coalescers is one or more, and when the number of the micro-vortex coalescers is more than two, the water outlet of the most downstream micro-vortex coalescers 1 is communicated with the water inlet of the natural oil removal section;
The number of the micro-vortex reactors 2 is one or more than two, and when the number of the micro-vortex reactors is more than two, the water outlet of the most downstream micro-vortex reactor is communicated with the water inlet of the sedimentation section.
Illustratively, as shown in fig. 1, the water inlet of the micro-vortex reactor further comprises a medicament inlet (for example, a coagulant inlet 23 and a flocculant inlet 24 positioned at the connecting pipe 8 between the micro-vortex coalescence degreasing section and the micro-vortex reactor);
Illustratively, the agent is selected from any one or more of a demulsifier, a coagulant, and a flocculant.
Illustratively, the residence times of the micro-vortex coalescer and the micro-vortex reactor are each independently selected from 2min to 20min, preferably, residence times are each independently selected from 5min to 10min;
the micro-vortex coalescer and the micro-vortex reactor are each independently selected from 10m/h to 360m/h of empty bed flow rate, preferably each independently selected from 25m/h to 90m/h;
illustratively, the hydraulic residence time of the conditioning micro-vortex coalescing oil removal stage is from 30min to 180min;
Illustratively, the hydraulic residence time of the settling section is from 30min to 120min.
Example 1:
As shown in fig. 1, the application provides an integrated treatment device for removing oil and suspended solids, which consists of a micro-vortex coalescence oil removal section 2, a sedimentation section 3, a micro-vortex coalescer, a micro-vortex reactor and the like. The liquid flows through the micro-vortex coalescer, the micro-vortex coalescence oil removing section 2, the micro-vortex reactor and the sedimentation section 3 in sequence.
The micro-vortex coalescer comprises a first section of micro-vortex coalescer 4-1, a second section of micro-vortex coalescer 4-2, a second section of micro-vortex coalescer connecting pipe 4-3 and the like. The section of micro-vortex coalescer 4-1 consists of a cylindrical drum, a section of micro-vortex coalescer bottom grid network 4101, and a first micro-vortex coalescer element 4102, etc. The two-stage micro-vortex coalescer 4-2 consists of a cylindrical barrel, a two-stage micro-vortex coalescer bottom grid 4201, second micro-vortex coalescing balls 4202, water distribution holes 4203 and the like.
As shown in FIG. 1, a section of the micro-vortex coalescer 4-1 is depicted broken during drawing to illustrate the conditioning of the micro-vortex coalescing oil removal section water collection device 7 and the chute 10. A section of the micro-vortex coalescer bottom grid network 4101 is used to maintain the first micro-vortex coalescer element 4102 in a section of the micro-vortex coalescer 4-1. The section of the micro-vortex reactor 5-1 is similar to the section of the micro-vortex coalescer 4-1 when depicted.
As shown in fig. 1, one end of a regulating micro-vortex coalescence deoiling section water collecting device 7 is communicated with a regulating micro-vortex coalescence deoiling section 2, the other end of the regulating micro-vortex coalescence deoiling section water collecting device 7 is communicated with one end of a connecting pipe 8 between the regulating micro-vortex coalescence deoiling section and the micro-vortex reactor, and the other end of the connecting pipe 8 between the regulating micro-vortex coalescence deoiling section and the micro-vortex reactor is communicated with the micro-vortex reactor 5.
As shown in fig. 1, the first-stage micro-vortex coalescer 4-1 is not directly communicated with the regulating micro-vortex coalescence deoiling section 2, the second-stage micro-vortex coalescer 4-2 is directly communicated with the regulating micro-vortex coalescence deoiling section 2, the first-stage micro-vortex reactor 5-1 is not directly communicated with the sedimentation section 3, and the second-stage micro-vortex reactor 5-2 is directly communicated with the sedimentation section 3; the regulating micro-vortex coalescence deoiling section 2 is communicated with the micro-vortex reactor 5-1 by regulating the annular perforated pipe 7102 of the micro-vortex coalescence deoiling section water collecting device, regulating the water collecting main pipe 7105 of the micro-vortex coalescence deoiling section water collecting device and the connecting pipe 8 between the micro-vortex reactors.
The micro-vortex reactor consists of a first-stage micro-vortex reactor 5-1, a second-stage micro-vortex reactor 5-2, a connecting pipe 5-3 between the first-stage micro-vortex reactor and the second-stage micro-vortex reactor, and the like. The first stage micro-vortex reactor 5-1 consists of a first stage micro-vortex reactor bottom grid net 5101, a third micro-vortex ball 5102 and the like. The two-stage micro-vortex reactor 5-2 consists of a grid mesh 5201 at the bottom of the two-stage micro-vortex reactor, a fourth micro-vortex sphere 5202, water distribution holes 5203 and the like.
The first and second micro-vortex reaction balls 5101 and 5102 may be micro-vortex balls as shown in fig. 8 or micro-vortex balls similar in structure to fig. 8. Illustratively, the surface openings of the micro-vortex reaction spheres may have a gauge of 10mm to 40mm; the aperture ratio may be 30% to 80%; the wall thickness of the micro-vortex reaction ball can be 1mm to 6mm; the diameter of the micro vortex reaction sphere may be 100mm to 300mm.
As shown in fig. 1, the produced water from the oil and gas field firstly enters the section of the micro vortex coalescer 4-1 in the micro vortex coalescer through the water inlet pipe 6, enters from the lower part of the section of the micro vortex coalescer 4-1 and flows out from the upper part. The section of micro-vortex coalescer 4-1 is positioned near the inner side wall of the tank body 1, one part of the section of micro-vortex coalescer is positioned in the regulating micro-vortex coalescence deoiling section 2, the other part of the section of micro-vortex coalescer is positioned in the sedimentation section 3, when water flows through the porous spherical shell diversion holes of the micro-vortex coalescer 4-1, the speed and the direction of the water flow change, a speed gradient is formed between the flow layers, a large amount of micro-vortices are formed in the fluid, oil particles in the water are promoted to collide in a disturbance manner, and then collide and agglomerate into large oil beads to float upwards, so that the effect of collision coalescence deoiling is achieved; and part of oil particles and suspended matters collide and combine in the micro vortex so as to enable the oil particles and suspended matters to have the capability of carrying suspended solids to float upwards; after passing through the micro vortex of the porous spherical shell diversion holes, some small oil particles are not collided and coalesced, and are adsorbed on the filler by the coalesced filler in the spherical shell, an oil layer is formed on the coalesced filler along with accumulation of adsorption, large oil beads are gradually coalesced on the oil layer, and the oil beads are separated from the filler to float upwards under the action of density difference, so that the effects of wetting, coalescing and oil removal are achieved; the wet coalescence of the coalescent filler makes up the defect that the micro vortex collision coalescence of the porous spherical shell does not catch tiny oil beads, combines two coalescent forms, improves the coalescent effect of the filler and enlarges the oil bead removal range. The produced water from the oil and gas field flowing out of the first-stage micro-vortex coalescer 4-1 enters the second-stage micro-vortex coalescer 4-2 through the second-stage micro-vortex coalescer connecting pipe 4-3.
The particles are further enlarged by further micro-vortex and mutual collision actions in the two-stage micro-vortex coalescer 4-2, then the oil-gas field produced water flows out of the two-stage micro-vortex coalescer 4-2 by water distribution through the first water distribution hole 4203, the oil-gas field produced water flows horizontally and downwards in a radial manner, and enters the micro-vortex coalescence oil removal section 2 (the space above the bottom plate 9 of the micro-vortex coalescence oil removal section is adjusted).
As shown in fig. 1, 2, 3 and 4, the produced water of the oil and gas field in the micro-vortex coalescence deoiling section 2 falls onto the bottom plate 9 of the micro-vortex coalescence deoiling section, and the liquid level is continuously raised until reaching the height of the water collecting device 7 of the micro-vortex coalescence deoiling section, and enters the water collecting device 7 of the micro-vortex coalescence deoiling section. The top baffle 7101 of the micro-vortex coalescence deoiling section water collecting device, the lower baffle 7104 of the micro-vortex coalescence deoiling section water collecting device and the side wall of the tank body 1 form an annular space with an upper sealed part and an open lower part together (as can be seen from fig. 4, the lower baffle 7104 can be in a zigzag shape, water collection is more uniform so as to obtain better oil-water separation effect), an annular perforated pipe 7102 of the micro-vortex coalescence deoiling section water collecting device is arranged in the annular space, and a hole is arranged at the lower end of the pipe, so that produced water of an oil gas field enters the annular perforated pipe 7102 of the micro-vortex coalescence deoiling section water collecting device, and produced water of the oil gas field in the annular perforated pipe 7102 of the micro-vortex coalescence deoiling section water collecting device enters the annular perforated pipe 7105 of the micro-vortex coalescence deoiling section water collecting device through the annular perforated pipe 7105 of the micro-vortex coalescence deoiling section water collecting device, and then enters the annular perforated pipe 718 of the micro-vortex coalescence deoiling section regulating section water collecting device so as to flow out of the micro-vortex coalescence deoiling section 2.
The larger oil and suspended solid particles are separated in the regulating micro-vortex coalescence deoiling section 2, the oil floats up to the top of the liquid level of the regulating micro-vortex coalescence deoiling section 2, is collected by an oil collecting groove 13 (an annular structure arranged on the side wall of the tank body 1) of the regulating micro-vortex coalescence deoiling section, and is discharged through an oil collecting pipe 14 of the regulating micro-vortex coalescence deoiling section.
Suspended solids in the produced liquid of the oil and gas field are settled at the bottom of the bottom plate 9 of the regulating micro-vortex coalescence deoiling section, the bottoms of the first-stage micro-vortex coalescer 4-1 and the second-stage micro-vortex coalescer 4-2, and are discharged through the mud discharging pipe 19 of the regulating micro-vortex coalescence deoiling section, the mud discharging pipe 17 of the first-stage micro-vortex coalescer and the mud discharging pipe 18 of the second-stage micro-vortex coalescer respectively.
The oil-gas field produced water enters a section of the micro-vortex reactor 5-1 in the micro-vortex reactor by adjusting a connecting pipe 8 between the micro-vortex coalescence deoiling section and the micro-vortex reactor, the oil-gas field produced water enters from the lower part of the section of the micro-vortex reactor 5-1 and is discharged from the upper part, when water flows pass through micro-vortex small holes at proper flow velocity, a large amount of small vortices are generated on the inner surface and the outer surface of the shell, the vortex flow of the water increases the flow velocity gradient, the diffusion of colloid and fine oil particles in the water is promoted to collide with the flocs, meanwhile, a three-dimensional flocs layer is formed in the reactor due to the small flow velocity, and has strong adsorption and net capturing effects, so that the oil particles and suspended solid particles are enlarged, and the flocculation efficiency is improved. The particles enter the lower part of the two-section micro-vortex reactor 5-2 through the connecting pipe 5-3 between the two-section micro-vortex reactor, and further become larger through further micro-vortex, mutual collision and flocculation and net capturing actions in the two-section micro-vortex reactor 5-2.
And then the oil and gas field produced water flows out of the two-stage micro-vortex reactor 5-2 through the second water distribution hole 5203 in a water distribution way, and the oil and gas field produced water flows horizontally and downwards in a radial way and enters the space of the sedimentation section 3 (the space above the bottom plate of the regulating micro-vortex coalescence degreasing section 9 and the tank body 1).
Illustratively, a coagulant feeding port 23 and a flocculant feeding port 24 can be arranged on the connecting pipe 8 between the micro vortex reactors, and coagulant and flocculant are respectively fed before the produced water of the oil-gas field enters the micro vortex reactors, so that emulsified oil is demulsified and colloid is destabilized, when water flows pass through the micro vortex small holes at proper flow velocity, a large amount of small vortices are generated on the inner surface and the outer surface of the shell, the vortex flow of the water increases the flow velocity gradient, the diffusion of colloid and fine oil particles in the water is promoted to collide with the flocs, meanwhile, a three-dimensional flocs layer is formed in the reactor due to the small flow velocity, and has strong adsorption and net capturing effects, so that the oil particles and suspended solid particles are increased, and the flocculation efficiency is improved.
As shown in fig. 1,2 and 3, the produced water of the oil and gas field in the settling section 3 falls onto the bottom plate of the tank 1, and the liquid level is continuously raised until reaching the height of the settling section water collecting device 11, and enters the settling section water collecting device 11. Wherein, subsidence water collecting device top baffle 11101, congeal subsidence water collecting device lower part baffle 11104 and jar body 1's lateral wall and constitute a lower open-ended annular space jointly, be provided with subsidence water collecting device annular perforated pipe 11102 in this annular space, the lower extreme of this pipe is provided with the hole for oil gas field produced water gets into subsidence water collecting device annular perforated pipe 11102, the oil gas field produced water in the subsidence water collecting device annular perforated pipe 11102 gets into subsidence water collecting device water collecting main 11105 through congeal subsidence water collecting device water collecting main 11103, then flows out jar body 1 through outlet pipe 12.
The oil and suspended solid particles in the produced water of the oil-gas field of the sedimentation section 3 are separated in the sedimentation section 3, the oil floats to the top of the liquid level, is collected by an annular perforated oil collecting pipe 15 (an annular structure arranged on the side wall of the tank body 1) of the sedimentation section, and is discharged through an oil collecting pipe 16 of the sedimentation section.
Suspended solids in the sedimentation section 3 are settled on the bottom plate of the tank body 1 and the bottoms of the first-section micro-vortex reactor 5-1 and the second-section micro-vortex reactor 5-2, and are discharged through the sedimentation section mud discharging pipe 21, the first-section micro-vortex reactor mud discharging pipe 21 and the second-section micro-vortex reactor mud discharging pipe 22 respectively.
Illustratively, field produced water in the settling section may be passed through a down tube 10 for further separation of oil and suspended solids using shallow pool principles.
The device provided by the application firstly carries out micro-vortex coalescence oil removal on incoming water, when water flows through the diversion holes of the porous shell of the micro-vortex collector, the speed and the direction of the water flow are changed, a speed gradient is formed between the water layers, a large number of micro-vortices are formed in the fluid, oil particles in the incoming water are promoted to be disturbed and collided, so that the oil particles are collided and aggregated to form big oil drops to float upwards, and the effect of collision coalescence oil removal is achieved; and part of oil particles and suspended matters collide and combine in the micro vortex so as to enable the oil particles and suspended matters to have the capability of carrying suspended solids to float upwards; after passing through the micro vortex of the diversion hole of the porous shell, some small oil particles are not collided and coalesced, the small oil particles are adsorbed on the filler by the coalesced filler in the porous shell, an oil layer is formed on the coalesced filler along with accumulation of adsorption, large oil beads are gradually coalesced on the oil layer, and the oil beads are separated from the filler to float upwards under the action of density difference, so that the effects of wetting, coalesced and deoiling are achieved; the wetting coalescence of the coalescent filler makes up for tiny oil droplets which are not captured by the micro-vortex collision coalescence of the porous shell, combines the two coalescent forms, improves the coalescence effect of the filler and enlarges the removal range of the oil droplets. Then enters a natural oil removal section, partial larger oil and suspended solid particles are separated through the action of natural sedimentation in the section, coagulant and flocculant are respectively added into effluent, the effluent enters a micro-vortex reaction section, emulsion breaking and colloid destabilization are carried out on the emulsified oil and the destabilized colloid through the added medicament, the oil particles and the suspended solid particles are increased through the actions of micro-vortex, mutual collision, three-dimensional flocculation, net capturing and the like, and then the effluent enters a sedimentation section, so that the three-phase separation of oil, mud and water is completed.
Claims (10)
1. A device for removing oil and suspended solids in water, comprising:
Regulating the micro-vortex coalescence oil removing section and the sedimentation section;
A micro-vortex coalescer is arranged at the upstream of the regulating micro-vortex coalescence oil removing section and comprises a micro-vortex coalescence element which is configured to enlarge the aggregation of oil and suspended solids in the oily sewage to be treated by utilizing the micro-vortex effect;
A micro-vortex reactor is arranged at the upstream of the sedimentation section and at the downstream of the regulating micro-vortex coalescence deoiling section, and comprises micro-vortex reaction balls which are configured to be capable of performing micro-vortex coalescence reaction;
The micro-vortex adjusting coalescence degreasing section is configured to adjust the micro-vortex action to separate oil and suspended solids in the oily sewage to be treated from water;
one end of the micro-vortex coalescer is communicated with a water inlet pipe for providing the oily sewage to be treated, and the other end of the micro-vortex coalescer is communicated with one end of the regulating micro-vortex coalescence deoiling section; the other end of the regulating micro-vortex coalescence deoiling section is communicated with one end of the micro-vortex reactor, and the other end of the micro-vortex reactor is communicated with the sedimentation section.
2. The apparatus for removing oil and suspended solids from water according to claim 1, wherein the apparatus further comprises a tank;
the tank body is of a vertical structure, and is divided into the regulating micro-vortex coalescence oil removing section and the sedimentation section which are not communicated with each other, wherein the upper part of the tank body is provided with the regulating micro-vortex coalescence oil removing section; the lower part of the tank body is the sedimentation section.
3. The apparatus according to claim 2, wherein the outlet of the conditioning micro-vortex coalescing removal stage is disposed proximate to the inner sidewall of the tank, the conditioning micro-vortex coalescing removal stage being in communication with the micro-vortex reactor through the outlet;
Optionally, the outlet of the regulating micro-vortex coalescence deoiling section is a first annular circular tube provided with an opening for allowing liquid to flow in; the first annular circular tube is communicated with the micro-vortex reactor.
4. A device for removing oil and suspended solids from water according to claim 2 or 3, wherein the outlet of the sedimentation section is located adjacent the inner side wall of the tank;
Optionally, the outlet of the sedimentation section is a second annular circular tube, and an opening is formed in the lower end of the second annular circular tube; and a water outlet of the treatment device for removing oil and suspended solids in the water of the second annular circular tube is communicated.
5. The device for removing oil and suspended solids in water according to claim 3, wherein the regulating micro-vortex coalescence deoiling section is provided with a first drain outlet and a first oil outlet;
The first oil outlet is positioned above the first annular circular pipe, and the first annular circular pipe is positioned above the first sewage draining outlet.
6. A treatment device for removing oil and suspended solids from water according to any one of claims 1 to 3, characterized in that the sedimentation section is provided with a second drain outlet and a second oil outlet;
the second oil outlet is positioned above the second annular circular pipe, and the second annular circular pipe is positioned above the second sewage draining outlet.
7. A treatment device for removing oil and suspended solids from water according to any one of claims 1 to 3, wherein the micro-vortex coalescing element is a micro-vortex coalescing ball filled with coalescing filler, the ratio of the outer diameter of the micro-vortex coalescing ball to the outer diameter of the coalescing filler being 1 (0.125 to 0.5);
optionally, the micro-vortex coalescing spheres have a diameter of 100mm to 300mm and are filled with coalescing filler having a diameter of 25mm to 75 mm;
Optionally, the material of the micro-vortex coalescing element has an average density of 0.9 x 10 3kg/m3 to 1.1 x 10 3kg/m3.
8. The apparatus according to claim 7, wherein the number of the micro-vortex coalescers is one or more, and when the number of the micro-vortex coalescers is more than two, the water outlet of the most downstream micro-vortex coalescers is communicated with the water inlet of the natural oil removal section;
the number of the micro-vortex reactors is one or more than two, and when the number of the micro-vortex reactors is more than two, the water outlet of the most downstream micro-vortex reactor is communicated with the water inlet of the sedimentation section.
9. A treatment device for removing oil and suspended solids from water according to any one of claims 1 to 3, wherein the water inlet of the micro-vortex reactor further comprises a medicament inlet.
10. A method for removing oil and suspended solids in water, characterized in that the treatment device for removing oil and suspended solids in water according to any one of claims 1 to 9 is used;
The residence times of the micro-vortex coalescer and the micro-vortex reactor are each independently selected from 2min to 20min, preferably, residence times are each independently selected from 5min to 10min;
the micro-vortex coalescer and the micro-vortex reactor are each independently selected from 10m/h to 360m/h of empty bed flow rate, preferably each independently selected from 25m/h to 90m/h;
Optionally, the hydraulic residence time of the conditioning micro-vortex coalescing oil removal stage is from 30min to 180min;
optionally, the hydraulic residence time of the settling section is from 30min to 120min.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211234690.8A CN117902677A (en) | 2022-10-10 | 2022-10-10 | Device and method for removing oil and suspended solids in water |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211234690.8A CN117902677A (en) | 2022-10-10 | 2022-10-10 | Device and method for removing oil and suspended solids in water |
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| CN202211234690.8A Pending CN117902677A (en) | 2022-10-10 | 2022-10-10 | Device and method for removing oil and suspended solids in water |
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