CN219972096U - Fracturing flowback fluid pretreatment system - Google Patents
Fracturing flowback fluid pretreatment system Download PDFInfo
- Publication number
- CN219972096U CN219972096U CN202321706699.4U CN202321706699U CN219972096U CN 219972096 U CN219972096 U CN 219972096U CN 202321706699 U CN202321706699 U CN 202321706699U CN 219972096 U CN219972096 U CN 219972096U
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- Prior art keywords
- tank
- pipe
- catalytic oxidation
- liquid inlet
- pretreatment system
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- 239000012530 fluid Substances 0.000 title claims abstract description 31
- 230000003647 oxidation Effects 0.000 claims abstract description 52
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 52
- 230000003197 catalytic effect Effects 0.000 claims abstract description 48
- 239000007788 liquid Substances 0.000 claims abstract description 44
- 238000004062 sedimentation Methods 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000013043 chemical agent Substances 0.000 claims abstract description 14
- 239000003054 catalyst Substances 0.000 claims abstract description 7
- 239000010802 sludge Substances 0.000 claims description 42
- 238000005273 aeration Methods 0.000 claims description 19
- 238000005188 flotation Methods 0.000 claims description 6
- 239000002893 slag Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims 1
- 239000010865 sewage Substances 0.000 abstract description 10
- 239000000126 substance Substances 0.000 abstract description 8
- 230000000694 effects Effects 0.000 description 6
- 239000003921 oil Substances 0.000 description 5
- 239000000084 colloidal system Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- -1 aluminum ions Chemical class 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 230000009920 chelation Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229920002907 Guar gum Polymers 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 239000000665 guar gum Substances 0.000 description 1
- 229960002154 guar gum Drugs 0.000 description 1
- 235000010417 guar gum Nutrition 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
Landscapes
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The utility model discloses a fracturing flow-back fluid pretreatment system which comprises a raw water lifting pump, an air floatation device, a catalytic oxidation device, a chemical agent softening tank and a sedimentation tank which are sequentially arranged along the flowing direction of liquid, wherein a first liquid inlet pipe and a second liquid inlet pipe are arranged on the raw water lifting pump, a first pH adjusting tank is arranged at the front end of the catalytic oxidation device, the air floatation device is communicated with the first pH adjusting tank through a first connecting pipe, the first liquid inlet pipe is communicated with the first connecting pipe, the second liquid inlet pipe is connected with the air floatation device, a pipeline mixer is arranged on the second liquid inlet pipe, and a catalyst feed port is arranged on the pipeline mixer. Adding flocculant through a pipeline mixer, removing oil content in the fracturing flowback fluid through an air floatation device and removing part of suspended matters, merging treated sewage with sewage of another branch, and then settling through a catalytic oxidation device, a chemical softening tank and a settling tank, so that organic matters and suspended matters in the flowback fluid are effectively removed, the condition that subsequent equipment is blocked by sewage is avoided, and the treatment difficulty of the subsequent equipment is reduced.
Description
Technical Field
The utility model relates to the technical field of fracturing flow-back fluid treatment, in particular to a fracturing flow-back fluid pretreatment system.
Background
The fracturing flowback fluid is a liquid containing solid phase which is discharged after the fracturing yield-increasing operation of the oil and gas field, the main components of the liquid are guar gum, preservative, gel breaker, petroleum and other various chemical additives, and the liquid has the characteristics of high COD value, high stability and high viscosity, and the liquid can be directly discharged without treatment to cause harm to the environment. The fracturing flow-back fluid treatment system mainly comprises three working procedures of pretreatment, biochemical treatment and advanced treatment, wherein the oil content of the fracturing flow-back fluid is removed through a physical and chemical means in the pretreatment working procedure, so that suspended matters in the flow-back fluid are reduced, but the existing pretreatment system has an unsatisfactory effect of removing suspended matters in waste liquid, and is easy to cause the condition that subsequent equipment is blocked, so that the treatment progress is influenced.
Disclosure of Invention
The utility model aims to provide a fracturing flow-back fluid pretreatment system, which solves the problems that the pretreatment system has an unsatisfactory effect on removing suspended matters in waste fluid, and is easy to cause the condition of pollution and blockage of subsequent equipment and influence the treatment progress.
The aim of the utility model is achieved by the following technical scheme:
the utility model provides a flowing back preprocessing system is returned in fracturing, includes raw water elevator pump, air supporting device, catalytic oxidation device, chemical agent softening tank, the sedimentation tank that set gradually along the liquid flow direction, be equipped with first feed liquor pipe and second feed liquor pipe on the raw water elevator pump, catalytic oxidation device front end is equipped with first pH equalizing basin, air supporting device with first pH equalizing basin passes through first connecting pipe intercommunication, first feed liquor pipe with first connecting pipe intercommunication, second feed liquor union coupling air supporting device, be equipped with the pipeline blender on the second feed liquor pipe, be equipped with the catalyst charge door on the pipeline blender.
Further, the pipeline mixer comprises a PAC pipeline mixer and a PAM pipeline mixer which are sequentially arranged along the flowing direction of liquid, the catalyst charging port comprises a PAC charging port and a PAM charging port, the PAC charging port is connected with the PAC pipeline mixer, and the PAM charging port is connected with the PAM pipeline mixer.
Further, the air floatation device is connected with a sludge box, a sludge pump is arranged on a sludge outlet pipe of the sludge box, and a slag outlet end of the sludge pump is connected with an external sludge settling tank.
Further, the catalytic oxidation device comprises a catalytic oxidation reactor and a catalytic oxidation aeration tank, microporous aeration devices are arranged in the catalytic oxidation reactor, the catalytic oxidation aeration tank and the first pH adjusting tank, and the catalytic oxidation aeration tank is communicated with the chemical agent softening tank through a second connecting pipe.
Further, the first pH adjusting tank is communicated with the catalytic oxidation reactor through a third connecting pipe, and a catalytic oxidation water inlet pump is arranged on the third connecting pipe.
Further, a circulating pipe is arranged in the catalytic oxidation aeration tank, the other end of the circulating pipe is connected with the catalytic oxidation reactor, a catalytic oxidation circulating pump is arranged on the circulating pipe, and the liquid inlet end of the second connecting pipe is connected with the circulating pipe.
Further, the front end of the chemical agent softening tank is provided with a second pH adjusting tank, the second pH adjusting tank is integrally arranged with the chemical agent softening tank, and the second pH adjusting tank is communicated with the second connecting pipe.
Further, the sedimentation tank is an inclined plate sedimentation tank, an overflow weir at the upper end of the inclined plate sedimentation tank is connected with a liquid outlet pipe, a sludge discharge pipe is arranged at the bottom of the inclined plate sedimentation tank, a sludge discharge pump is arranged on the sludge discharge pipe, and a sludge outlet end of the sludge discharge pump is connected with an external sludge sedimentation tank.
The utility model has the following advantages:
adding flocculant through a pipeline mixer, removing oil content in the fracturing flowback fluid through an air floatation device and removing part of suspended matters, merging treated sewage and sewage of another branch, oxidizing organic matters in the flowback fluid through a catalytic oxidation device, destroying the chelation of colloid and high polymer matters on calcium and magnesium, then entering a chemical softening tank to remove total hardness of the flowback fluid, then entering a sedimentation tank to sediment, effectively removing the organic matters and suspended matters in the flowback fluid, effectively avoiding the condition that sewage is blocked by subsequent equipment, and reducing the treatment difficulty of the subsequent equipment.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
In the figure, a 1-raw water lifting pump, a 101-first liquid inlet pipe, a 102-second liquid inlet pipe, a 2-air floatation device, a 3-sedimentation tank, a 4-first pH regulating tank, a 5-first connecting pipe, a 6-sludge box, a 7-sludge pump, an 8-catalytic oxidation reactor, a 9-catalytic oxidation aeration tank, a 10-micropore aeration device, a 11-second connecting pipe, a 12-third connecting pipe, a 13-catalytic oxidation water inlet pump, a 14-circulating pipe, a 15-catalytic oxidation circulating pump, a 16-chemical agent softening tank, a 17-second pH regulating tank, a 18-liquid outlet pipe, a 19-sludge discharge pipe and a 20-sludge discharge pump.
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. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model.
In addition, the embodiments of the present utility model and the features of the embodiments may be combined with each other without collision.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, or are directions or positional relationships conventionally understood by those skilled in the art, are merely for convenience of describing the present utility model and for simplifying the description, and are not to indicate or imply that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1, one embodiment of the present utility model is:
the utility model provides a fracturing flow-back fluid pretreatment systems, includes raw water elevator pump 1, air supporting device 2, catalytic oxidation device, chemical agent softening tank 16, sedimentation tank 3 that set gradually along the liquid flow direction, be equipped with first feed liquor pipe 101 and second feed liquor pipe 102 on the raw water elevator pump 1, catalytic oxidation device front end is equipped with first pH equalizing basin 4, air supporting device 2 with first pH equalizing basin 2 passes through first connecting pipe 5 intercommunication, first feed liquor pipe 101 with first connecting pipe 5 intercommunication, second feed liquor pipe 102 connects air supporting device 2, be equipped with the pipeline blender on the second feed liquor pipe 102, be equipped with the catalyst charge door on the pipeline blender.
Specifically, the pipeline mixer comprises a PAC pipeline mixer and a PAM pipeline mixer which are sequentially arranged along the flowing direction of liquid, wherein the catalyst charging port comprises a PAC charging port and a PAM charging port, the PAC charging port is connected with the PAC pipeline mixer, and the PAM charging port is connected with the PAM pipeline mixer.
The second liquid inlet pipe 102 on the raw water lifting pump 1 is used for introducing the air flotation device 2, the pipeline mixer is arranged on the second liquid inlet pipe, the flocculant is added, then the oil content in the fracturing flowback fluid is removed through the air flotation device 2, part of suspended matters are removed, the treated sewage is converged with the other branch sewage, and then organic matters in the flowback fluid are oxidized through the catalytic oxidation device, so that the chelation effect of colloid and high polymer matters on calcium and magnesium is destroyed, the total hardness of the flowback fluid is removed through the chemical softening tank, and then the flowback fluid is deposited in the sedimentation tank 3, so that the organic matters and the suspended matters in the flowback fluid are effectively removed, the pretreatment effect is better, the pollution and blockage of subsequent equipment is effectively avoided, and the treatment difficulty of the subsequent equipment is reduced.
PAC is used as the most commonly used sewage treatment medicament, and trivalent aluminum ions are utilized to effectively remove pollutants such as oils, chromaticity, heavy metal ions, fluoride ions, total phosphorus and the like in sewage; the PAM is matched to promote the rapid precipitation and agglomeration of suspended particles and colloids in the solution into larger or smaller particles, so that the particles are convenient to filter and remove.
Specifically, PAC and PAM are also added at the rear of the chemical softening tank 16 to allow more efficient precipitation of organics and suspended matter in the precipitation tank.
In this embodiment, the air flotation device 2 is connected with a sludge box 6, a sludge pump 7 is installed on a sludge outlet pipe of the sludge box 6, and a slag outlet end of the sludge pump 7 is connected with an external sludge settling tank.
Specifically, the sludge box 6 is connected with a sludge tank on the upper part of the air floatation device and a sludge pipe on the bottom, the upper part of the air floatation device is provided with a sludge scraper for scraping suspended sludge into the sludge tank, and the bottom of the air floatation device is correspondingly provided with a sludge scraper for collecting precipitated sludge.
In this embodiment, the catalytic oxidation device includes a catalytic oxidation reactor 8 and a catalytic oxidation aeration tank 9, the catalytic oxidation reactor 8, the catalytic oxidation aeration tank 9, and the first pH adjusting tank 4 are all provided with a microporous aeration device 10, and the catalytic oxidation aeration tank 9 is communicated with the chemical agent softening tank through a second connecting pipe 11.
Specifically, the first pH adjusting tank 4 is communicated with the catalytic oxidation reactor 8 through a third connecting pipe 12, and a catalytic oxidation water inlet pump 13 is arranged on the third connecting pipe 12.
The first pH adjusting tank 4 is added with hydrochloric acid through a dosing device, the liquid is adjusted to be in an acidic state, the microporous aeration device 10 is used for mixing the liquid and providing an aerobic environment, the acidified liquid is input into the catalytic oxidation reactor 8 through the catalytic oxidation water inlet pump 13, organic matters in the liquid are oxidatively decomposed, CODcr of the liquid is reduced, and the liquid enters the catalytic oxidation aeration tank 9 through the overflow weir to be aerated and then enters the subsequent chemical agent softening tank 16.
Further, a circulation pipe 14 is arranged in the catalytic oxidation aeration tank 9, the other end of the circulation pipe 14 is connected with the catalytic oxidation reactor 8, a catalytic oxidation circulation pump 15 is arranged on the circulation pipe 14, and the liquid inlet end of the second connection pipe 11 is connected with the circulation pipe 14.
The circulation pipe 14 is used for circularly conveying the aerated liquid to the catalytic oxidation reactor 8, improving the decomposition effect on organic matters in the flowback liquid and oxidizing and destroying colloid, and the proportion of the circulating liquid is regulated by connecting a liquid inlet pipe of the second connecting pipe 11 into the circulation pipe 14 and controlling the second connecting pipe 11 and a valve on the circulation pipe 14.
In this embodiment, a second pH adjusting tank 17 is disposed at the front end of the chemical softening tank 16, and the second pH adjusting tank 17 is integrally disposed with the chemical softening tank 16, and the second pH adjusting tank 17 is in communication with the second connection pipe 11.
The second pH adjusting tank 17 is added with alkali liquor through a dosing device, and the liquid is adjusted to be in an alkaline state so as to ensure the softening treatment effect of the chemical agent softening tank on the liquid.
The sedimentation tank 3 is a sloping plate sedimentation tank, an overflow weir at the upper end of the sloping plate sedimentation tank is connected with a liquid outlet pipe 18, a sludge discharge pipe 19 is arranged at the bottom of the sloping plate sedimentation tank, a sludge discharge pump 20 is arranged on the sludge discharge pipe 19, and a sludge outlet end of the sludge discharge pump 20 is connected with an external sludge sedimentation tank.
And an inclined plate sedimentation tank is adopted, so that the sedimentation time is shortened, and the treatment efficiency is improved.
Although the present utility model has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present utility model.
Claims (8)
1. A fracturing flow-back fluid pretreatment system is characterized in that: the device comprises a raw water lifting pump, an air flotation device, a catalytic oxidation device, a chemical agent softening tank and a sedimentation tank which are sequentially arranged along the flowing direction of liquid, wherein a first liquid inlet pipe and a second liquid inlet pipe are arranged on the raw water lifting pump, a first pH adjusting tank is arranged at the front end of the catalytic oxidation device, the air flotation device is communicated with the first pH adjusting tank through a first connecting pipe, the first liquid inlet pipe is communicated with the first connecting pipe, the second liquid inlet pipe is connected with the air flotation device, a pipeline mixer is arranged on the second liquid inlet pipe, and a catalyst feeding port is arranged on the pipeline mixer.
2. The fracturing flow-back fluid pretreatment system of claim 1, wherein: the pipe mixer comprises a PAC pipe mixer and a PAM pipe mixer which are sequentially arranged along the flowing direction of liquid, wherein the catalyst charging port comprises a PAC charging port and a PAM charging port, the PAC charging port is connected with the PAC pipe mixer, and the PAM charging port is connected with the PAM pipe mixer.
3. The fracturing flow-back fluid pretreatment system of claim 1, wherein: the air floatation device is connected with a sludge box, a sludge pump is arranged on a sludge outlet pipe of the sludge box, and a slag outlet end of the sludge pump is connected with an external sludge settling tank.
4. The fracturing flow-back fluid pretreatment system of claim 1, wherein: the catalytic oxidation device comprises a catalytic oxidation reactor and a catalytic oxidation aeration tank, wherein microporous aeration devices are arranged in the catalytic oxidation reactor, the catalytic oxidation aeration tank and the first pH adjusting tank, and the catalytic oxidation aeration tank is communicated with the chemical agent softening tank through a second connecting pipe.
5. The fracturing flow-back fluid pretreatment system of claim 4, wherein: the first pH adjusting tank is communicated with the catalytic oxidation reactor through a third connecting pipe, and a catalytic oxidation water inlet pump is arranged on the third connecting pipe.
6. The fracturing flow-back fluid pretreatment system of claim 5, wherein: the catalytic oxidation aeration tank is internally provided with a circulating pipe, the other end of the circulating pipe is connected with the catalytic oxidation reactor, the circulating pipe is provided with a catalytic oxidation circulating pump, and the liquid inlet end of the second connecting pipe is connected with the circulating pipe.
7. The fracturing flow-back fluid pretreatment system of claim 4, wherein: the front end of the chemical agent softening tank is provided with a second pH adjusting tank, the second pH adjusting tank and the chemical agent softening tank are integrally arranged, and the second pH adjusting tank is communicated with the second connecting pipe.
8. The fracturing flow-back fluid pretreatment system of claim 1, wherein: the sedimentation tank is the swash plate sedimentation tank, the upper end overflow weir of swash plate sedimentation tank is connected with the drain pipe, the bottom of swash plate sedimentation tank is equipped with the mud pipe, be equipped with the mud pump on the mud pipe, the mud end of the mud pump of discharging is connected outside mud settling cask.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321706699.4U CN219972096U (en) | 2023-06-30 | 2023-06-30 | Fracturing flowback fluid pretreatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321706699.4U CN219972096U (en) | 2023-06-30 | 2023-06-30 | Fracturing flowback fluid pretreatment system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219972096U true CN219972096U (en) | 2023-11-07 |
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ID=88581365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321706699.4U Active CN219972096U (en) | 2023-06-30 | 2023-06-30 | Fracturing flowback fluid pretreatment system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219972096U (en) |
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2023
- 2023-06-30 CN CN202321706699.4U patent/CN219972096U/en active Active
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