CN114394656A - Shale atmospheric pressure splits and returns flowing back flocculation treatment reactor - Google Patents
Shale atmospheric pressure splits and returns flowing back flocculation treatment reactor Download PDFInfo
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- CN114394656A CN114394656A CN202210052688.2A CN202210052688A CN114394656A CN 114394656 A CN114394656 A CN 114394656A CN 202210052688 A CN202210052688 A CN 202210052688A CN 114394656 A CN114394656 A CN 114394656A
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- 238000005189 flocculation Methods 0.000 title claims abstract description 159
- 230000016615 flocculation Effects 0.000 title claims abstract description 159
- 238000006243 chemical reaction Methods 0.000 claims abstract description 126
- 239000012530 fluid Substances 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000007788 liquid Substances 0.000 claims description 12
- 239000000084 colloidal system Substances 0.000 abstract description 8
- 239000002245 particle Substances 0.000 abstract description 8
- 239000010419 fine particle Substances 0.000 abstract description 6
- 230000001687 destabilization Effects 0.000 abstract description 4
- 230000003321 amplification Effects 0.000 abstract description 3
- 238000013461 design Methods 0.000 abstract description 3
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 32
- 238000011161 development Methods 0.000 description 6
- 230000018109 developmental process Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000002699 waste material Substances 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000008394 flocculating agent Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/004—Seals, connections
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/06—Pressure conditions
- C02F2301/066—Overpressure, high pressure
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a flocculation treatment reactor for shale gas fracturing flowback fluid, and relates to the technical field of flocculation reactors. The reactor comprises a first-stage flocculation reaction chamber, a second-stage flocculation reaction chamber, a third-stage flocculation reaction chamber and an overflow collecting tank; the two sides of the primary flocculation reaction chamber are symmetrically connected with a first water inlet pipe and a second water inlet pipe, and the two water inlet pipes tangentially enter the primary flocculation reaction chamber in opposite flow directions to form impinging stream to generate impinging stream flocculation reaction; the secondary flocculation reaction chamber is a rotating flow flocculation reaction chamber; the third-stage flocculation reaction chamber is an up-flow and plug-flow flocculation reaction chamber; the volumes of the first-stage flocculation reaction chamber, the second-stage flocculation reaction chamber and the third-stage flocculation reaction chamber are gradually increased. The invention adopts the structural design of multiple particle collision modes, multistage velocity gradient reinforced flocculation reaction and gradual amplification of the main flow volume of the reactor, improves the flocculation efficiency, shortens the flocculation time, reduces the operation cost and solves the problems of destabilization and flocculation of fine particles and colloid of the shale gas fracturing flow-back fluid.
Description
Technical Field
The invention relates to the technical field of flocculation reactors, in particular to a shale gas fracturing flowback fluid flocculation treatment reactor.
Background
The shale gas is clean low carbon resource of unconventional natural gas strategy, and the fracturing flow-back fluid generated in the development of the shale gas has complex components, high suspended matter content, high organic matter content, high mineralization degree and great processing difficulty. The method has the advantages that the water resource consumption of shale gas resource development is reduced, and the reasonable treatment of complex and difficult-to-treat fracturing flowback fluid with large disposal amount becomes one of bottleneck problems of large-scale and sustainable development of shale gas. The existing shale gas fracturing flowback fluid treatment has the problems of long process flow, low efficiency, high cost and the like, and an advanced and efficient shale gas fracturing flowback fluid treatment technology, equipment and process are developed.
The main modes for treating shale gas fracturing flowback fluid in China are natural air drying and deep well reinjection, and the pretreatment before deep well reinjection mainly adopts methods of dosing coagulation, filtering and the like. In recent years, the research and development of treatment technologies are increased in China, the treatment technologies such as flocculation sedimentation, oxidation and adsorption are adopted for treatment and then are recycled, and some modularized movable treatment equipment is also developed. The domestic shale gas fracturing flowback fluid treatment technology is still in the research and application starting stage on the whole, and along with the large-scale development of domestic shale gas, the treatment of water for fracturing liquid preparation and flowback fluid becomes a bottleneck for restricting the development of the shale gas.
Flocculation is an indispensable treatment link in the shale gas fracturing flowback fluid treatment technology, and the effect of the flocculation has direct influence on the treatment effect, the operation working condition and the cost of the subsequent process. However, the shale gas fracturing flowback fluid has complex components, high suspended matter content, high organic matter content and great treatment difficulty, so that the development of a high-efficiency flocculation reactor is urgently needed.
Disclosure of Invention
In view of the above, the invention discloses a flocculation treatment reactor for shale gas fracturing flow-back fluid, which is used for solving the problems of destabilization and flocculation of fine particles and colloids of the shale gas fracturing flow-back fluid.
The invention provides a flocculation treatment reactor for shale gas fracturing flow-back fluid, which comprises a primary flocculation reaction chamber, a secondary flocculation reaction chamber, a tertiary flocculation reaction chamber and an overflow collecting tank, wherein the primary flocculation reaction chamber, the secondary flocculation reaction chamber and the tertiary flocculation reaction chamber are sequentially connected, and the overflow collecting tank is arranged outside the tertiary flocculation reaction chamber; the primary flocculation reaction chamber is an impinging stream flocculation reaction chamber, a first water inlet pipe and a second water inlet pipe are symmetrically connected to two sides of the primary flocculation reaction chamber, and the shale gas fracturing flow-back fluid enters the primary flocculation reaction chamber in opposite flow directions and symmetrical tangential directions through the two water inlet pipes respectively after being pressurized and divided by a centrifugal pump to form impinging streams to generate impinging stream flocculation reaction; the second-stage flocculation reaction chamber is a rotating flow flocculation reaction chamber, a first guide plate is arranged at the joint of the second-stage flocculation reaction chamber and the first-stage flocculation reaction chamber, and shale gas fracturing backflow liquid subjected to impinging stream flocculation reaction enters the second-stage flocculation reaction chamber through the first guide plate to generate rotating flow flocculation reaction; the third-stage flocculation reaction chamber is an upflow-plug flocculation reaction chamber, a second guide plate is arranged at the joint of the second-stage flocculation reaction chamber and the third-stage flocculation reaction chamber, and shale gas fracturing backflow liquid subjected to rotational flow flocculation reaction enters the third-stage flocculation reaction chamber through the second guide plate to generate upflow-plug flocculation reaction; the shale gas fracturing flowback liquid containing flocs after the upflow-plug flow flocculation reaction forms overflow at the top of the reactor, and enters an overflow collecting tank to be discharged; the volumes of the first-stage flocculation reaction chamber, the second-stage flocculation reaction chamber and the third-stage flocculation reaction chamber are gradually increased.
Preferably, the first water inlet pipe and the second water inlet pipe are tangentially connected with the first-stage flocculation reaction chamber, and shale gas fracturing flow-back fluid in the first water inlet pipe and the second water inlet pipe respectively enters the first-stage flocculation reaction chamber in a clockwise and anticlockwise tangential manner.
Preferably, the first guide plate is arranged on the upper edge of the primary flocculation reaction chamber, has an included angle of 30-45 degrees with the horizontal plane, is 3-6 pieces in number, and is integrally in an inverted cone shape.
Preferably, the second guide plate is arranged on the upper edge of the secondary flocculation reaction chamber, has an included angle of 30-45 degrees with the horizontal plane, is 5-10 pieces in number, and is integrally in an inverted cone shape.
Preferably, the volume ratio of the first-stage flocculation reaction chamber to the second-stage flocculation reaction chamber to the third-stage flocculation reaction chamber is 1:4: 16.
Compared with the prior art, the flocculation treatment reactor for the shale gas fracturing flowback fluid disclosed by the invention has the advantages that:
aiming at micro-fine particle-level particles and colloid particles in the shale gas fracturing flowback fluid, the invention adopts the structural design of multiple particle collision modes, multi-level velocity gradient enhanced flocculation reaction and gradual amplification of the main flow volume of the reactor, thereby improving the flocculation efficiency, shortening the flocculation time, reducing the operation cost and solving the problems of destabilization and flocculation of the micro-fine particles and the colloid of the shale gas fracturing flowback fluid. The reactor has compact structure, no rotating part in the reactor, simple and convenient operation, simple maintenance, good flocculation treatment effect and wide practicability in the technical field.
Drawings
For a clearer explanation of the embodiments or technical solutions of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for a person skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a flocculation treatment reactor disclosed in the present invention.
The part names represented by the numbers or letters in the drawings are:
1-a first water inlet pipe; 2-a second water inlet pipe; 3-overflow collecting tank; 4-a first baffle; 5-a second baffle; 6-first-stage flocculation reaction chamber; 7-a secondary flocculation reaction chamber; 8-three-stage flocculation reaction chamber.
Detailed Description
The following provides a brief description of embodiments of the present invention with reference to the accompanying drawings. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art based on the embodiments of the present invention without any inventive work belong to the protection scope of the present invention.
Fig. 1 shows a preferred embodiment of the present invention, which is parsed in detail.
The flocculation reactor disclosed by the invention is particularly suitable for treating shale gas fracturing flowback fluid, oil and gas field fracturing waste liquid, drilling waste liquid and acidizing waste liquid flocculation reaction, and is also suitable for treating petroleum and chemical wastewater flocculation.
The shale gas fracturing flow-back fluid flocculation treatment reactor shown in fig. 1 comprises a first-stage flocculation reaction chamber 6, a second-stage flocculation reaction chamber 7, a third-stage flocculation reaction chamber 8 and an overflow collecting tank 3 arranged outside the third-stage flocculation reaction chamber 8, wherein the first-stage flocculation reaction chamber, the second-stage flocculation reaction chamber and the third-stage flocculation reaction chamber are sequentially connected. The volumes of the first-stage flocculation reaction chamber 6, the second-stage flocculation reaction chamber 7 and the third-stage flocculation reaction chamber 8 are gradually increased, and the volume ratio is 1:4: 16. Aiming at micro-fine particle-level particles and colloid particles in the shale gas fracturing flowback fluid, the invention adopts the structural design of multiple particle collision modes, multi-level velocity gradient enhanced flocculation reaction and gradual amplification of the main flow volume of the reactor, thereby improving the flocculation efficiency, shortening the flocculation time, reducing the operation cost and solving the problems of destabilization and flocculation of the micro-fine particles and the colloid of the shale gas fracturing flowback fluid.
One-level flocculation reaction chamber 6 is impinging stream flocculation reaction chamber, its bilateral symmetry is connected with first inlet tube 1 and second inlet tube 2, first inlet tube 1 and second inlet tube 2 link to each other with 6 tangents of one-level flocculation reaction chamber, shale atmospheric pressure splits to return the flowing back and passes through the centrifugal pump pressure boost reposition of redundant personnel back, respectively through first inlet tube 1 and second inlet tube 2 with clockwise, anticlockwise tangent entering one-level flocculation reaction chamber 6 forms impinging stream, produce mutual collision between water particulate matter or colloid granule in impinging stream flocculation reaction chamber, interpenetration, and at the coagulant, under the flocculating agent effect, produce impinging stream flocculation reaction, the colloid particle breaks the glue, destabilize, form less floc.
The second grade flocculation reaction chamber 7 is the rotational flow flocculation reaction chamber, and its junction with first grade flocculation reaction chamber 6 is equipped with first guide plate 4, and first guide plate 4 sets up in first grade flocculation reaction chamber 6 upper edge, is 30 ~ 45 with the horizontal plane contained angle, and the quantity is 3 ~ 6 pieces, wholly is the back taper type. The shale gas fracturing flow-back liquid after the impinging stream flocculation reaction enters a second-stage flocculation reaction chamber 7 with larger space and lower flow velocity through a first guide plate 4 to generate a rotating stream flocculation reaction, loose flocs are crushed under the shearing force action of a rotating fluid and flocculate again, the flocs further grow up and are dense, the shearing resistance is correspondingly and gradually enhanced, and the flocs with higher compactness are formed to be difficult to crush.
The tertiary flocculation reaction chamber 8 is a lift plug flow flocculation reaction chamber, and the junction of the secondary flocculation reaction chamber 7 and the tertiary flocculation reaction chamber is provided with a second guide plate 5, and the second guide plate 5 is arranged on the upper edge of the secondary flocculation reaction chamber 7, has an included angle of 30-45 degrees with the horizontal plane, is 5-10 pieces in number, and is integrally in an inverted cone shape. The shale gas fracturing flow-back fluid after the rotating flow flocculation reaction enters a third-stage flocculation reaction chamber 8 with larger space and lower flow velocity through a second guide plate 5 to generate a lift flow flocculation reaction, and flocs with higher compactness, larger volume and better settling property are formed. The shale gas fracturing flowback liquid containing flocs after the upflow-plug flow flocculation reaction forms overflow at the top of the reactor, enters an overflow collecting tank 3 and is discharged.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (5)
1. A flocculation treatment reactor for shale gas fracturing flowback fluid is characterized by comprising a primary flocculation reaction chamber (6), a secondary flocculation reaction chamber (7), a tertiary flocculation reaction chamber (8) and an overflow collecting tank (3) arranged outside the tertiary flocculation reaction chamber (8), wherein the primary flocculation reaction chamber, the secondary flocculation reaction chamber and the tertiary flocculation reaction chamber are sequentially connected; the primary flocculation reaction chamber (6) is an impinging stream flocculation reaction chamber, a first water inlet pipe (1) and a second water inlet pipe (2) are symmetrically connected to two sides of the primary flocculation reaction chamber, and the shale gas fracturing flow-back fluid enters the primary flocculation reaction chamber (6) through the two water inlet pipes in opposite flow directions and symmetrical tangential directions after being pressurized and divided by a centrifugal pump to form impinging stream to generate impinging stream flocculation reaction; the second-stage flocculation reaction chamber (7) is a rotating flow flocculation reaction chamber, a first guide plate (4) is arranged at the joint of the second-stage flocculation reaction chamber and the first-stage flocculation reaction chamber (6), and shale gas fracturing flowback liquid subjected to impinging stream flocculation reaction enters the second-stage flocculation reaction chamber (7) through the first guide plate (4) to generate rotating flow flocculation reaction; the third-stage flocculation reaction chamber (8) is an upflow and plug flow flocculation reaction chamber, a second guide plate (5) is arranged at the joint of the third-stage flocculation reaction chamber and the second-stage flocculation reaction chamber (7), and shale gas fracturing flowback liquid subjected to rotational flow flocculation reaction enters the third-stage flocculation reaction chamber (8) through the second guide plate (5) to generate upflow and plug flow flocculation reaction; the shale gas fracturing flowback liquid containing flocs after the upflow-plug flow flocculation reaction forms overflow at the top of the reactor, and enters an overflow collecting tank (3) for discharge; the volumes of the first-stage flocculation reaction chamber (6), the second-stage flocculation reaction chamber (7) and the third-stage flocculation reaction chamber (8) are gradually increased.
2. The flocculation treatment reactor for shale gas fracturing flow-back fluid according to claim 1, wherein the first water inlet pipe (1) and the second water inlet pipe (2) are tangentially connected with the primary flocculation reaction chamber (6), and the shale gas fracturing flow-back fluid in the first water inlet pipe (1) and the second water inlet pipe (2) respectively tangentially enters the primary flocculation reaction chamber (6) clockwise and anticlockwise.
3. The flocculation treatment reactor for the shale gas fracturing flowback fluid as claimed in claim 1, wherein the first guide plate (4) is arranged at the upper edge of the primary flocculation reaction chamber (6), has an included angle of 30-45 degrees with the horizontal plane, is 3-6 pieces in number, and is in an inverted cone shape as a whole.
4. The flocculation treatment reactor for the shale gas fracturing flowback fluid as claimed in claim 1, wherein the second guide plate (5) is arranged at the upper edge of the secondary flocculation reaction chamber (7), has an included angle of 30-45 degrees with the horizontal plane, is 5-10 pieces in number, and is in an inverted cone shape as a whole.
5. The flocculation treatment reactor for shale gas fracturing flowback fluid as claimed in claim 1, wherein the volume ratio of the primary flocculation reaction chamber (6), the secondary flocculation reaction chamber (7) and the tertiary flocculation reaction chamber (8) is 1:4: 16.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210052688.2A CN114394656B (en) | 2022-01-18 | 2022-01-18 | Shale gas fracturing flow-back fluid flocculation treatment reactor |
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| CN202210052688.2A CN114394656B (en) | 2022-01-18 | 2022-01-18 | Shale gas fracturing flow-back fluid flocculation treatment reactor |
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| CN114394656B CN114394656B (en) | 2023-11-17 |
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