CN116693027A - Online neutralization device for fracturing flow-back acid liquid - Google Patents
Online neutralization device for fracturing flow-back acid liquid Download PDFInfo
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- CN116693027A CN116693027A CN202210173400.7A CN202210173400A CN116693027A CN 116693027 A CN116693027 A CN 116693027A CN 202210173400 A CN202210173400 A CN 202210173400A CN 116693027 A CN116693027 A CN 116693027A
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- 239000007788 liquid Substances 0.000 title claims abstract description 94
- 238000006386 neutralization reaction Methods 0.000 title claims abstract description 51
- 239000002253 acid Substances 0.000 title claims abstract description 35
- 239000000843 powder Substances 0.000 claims abstract description 54
- 238000000926 separation method Methods 0.000 claims abstract description 40
- 230000018044 dehydration Effects 0.000 claims abstract description 22
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 22
- 238000005086 pumping Methods 0.000 claims abstract description 19
- 239000012530 fluid Substances 0.000 claims abstract description 16
- 239000007791 liquid phase Substances 0.000 claims abstract description 9
- 239000012071 phase Substances 0.000 claims abstract description 5
- 239000003814 drug Substances 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 claims description 4
- 239000002274 desiccant Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 17
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 238000011161 development Methods 0.000 abstract description 4
- 239000010865 sewage Substances 0.000 abstract description 2
- 230000003472 neutralizing effect Effects 0.000 description 23
- 239000007789 gas Substances 0.000 description 17
- 208000005156 Dehydration Diseases 0.000 description 16
- 230000008569 process Effects 0.000 description 15
- 239000003795 chemical substances by application Substances 0.000 description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000002699 waste material Substances 0.000 description 5
- 239000003153 chemical reaction reagent Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000007792 gaseous phase Substances 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Classifications
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
-
- 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
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
-
- 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
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
-
- 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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/40—Liquid flow rate
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/42—Liquid level
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The invention belongs to the field of oil and gas field development sewage treatment, and particularly relates to an online neutralization device for fracturing flow-back acid liquid. The fracturing flow-back acid liquid on-line neutralization device comprises gas-liquid separation equipment, a dehydration device, a neutralization powder storage device and a mixing reactor, wherein a liquid phase inlet of the gas-liquid separation equipment is connected and communicated with a wellhead through a medium pipeline, a gas phase outlet of the gas-liquid separation equipment is connected and communicated with an inlet of the dehydration device through a first pipeline, a powder outlet of the neutralization powder storage device is connected and communicated with a medium inlet of the mixing reactor through a second pipeline, and an output end of the mixing reactor is connected with a pumping device, and an input end of the pumping device is connected with a liquid phase outlet of the gas-liquid separation equipment through a third pipeline. The advantages are that: the method can effectively neutralize the residual acid in the flowback fluid in the pipeline, reduce the acidity and corrosiveness of the flowback fluid, and reduce the subsequent treatment difficulty, the treatment cost and the environmental risk.
Description
Technical Field
The invention belongs to the field of oil and gas field development sewage treatment, and particularly relates to an online neutralization device for fracturing flow-back acid liquid.
Background
The acidizing and fracturing is a measure for increasing yield of oil and gas reservoirs, and is different from conventional hydraulic sand inclusion fracturing, the acidizing and fracturing does not need to add propping agents, the fracturing rock stratum is corroded to be an uneven surface mainly through the corrosion action of fracturing fluid (acidity), after the ground fracturing pumping system is stopped, cracks cannot be completely closed due to the corrosion action, diversion channels required by oil and gas reservoir development are formed, and the acidizing and fracturing process is particularly widely applied to carbonate oil and gas reservoirs.
Along with the increasing environmental protection requirements of countries and places, various waste liquids generated in the oil field exploration and development production process need to be managed without falling to the ground, and two main treatment modes are provided for fracturing flowback liquids at present: firstly, discharging after treatment, mainly controlling indexes such as COD, oil, pH value and the like of the flowback fluid; secondly, the waste liquid is recycled after treatment, and indexes such as oil, suspended matters, hardness, pH value and the like of the waste liquid are mainly controlled. Because the flowback fluid after acid fracturing contains a large amount of residual acid and formation acid gas, the flowback fluid has the characteristics of strong acidity, high viscosity, complex components and the like, the pH value can reach below 3, the flowback fluid has stronger corrosiveness, if neutralization treatment is not performed, the on-site storage difficulty is increased, equipment corrosion is caused, the treatment cost is increased, meanwhile, the acid fracturing fluid can generate toxic hydrogen sulfide gas after reacting with sulfide, the personal safety of on-site operators is influenced, the environmental pollution is caused, and the recycling of the flowback fluid after the treatment is influenced.
In order to solve the problems, the prior art mainly comprises the step that after the blowout is completed, an operator adds solid caustic soda flakes or sodium hydroxide aqueous solution into a flowback liquid storage tank to perform neutralization treatment. The volume of the flowback liquid storage tank is large, the labor intensity is high, the operation risk is high, the reagent sedimentation and neutralization reaction time are long and the like in a processing mode of manually and fixedly adding the neutralization reagent, and the reagent waste and neutralization reaction are not detected due to the fact that a real-time monitoring and feedback system is lacked, and in addition, the total amount of flowback liquid in the liquid storage tank is increased due to the fact that the adding quantity of the reagent is difficult to accurately control, and the follow-up processing cost is increased.
Disclosure of Invention
The invention aims to solve the technical problem of providing an on-line neutralization device for fracturing flowback acid liquid, which effectively overcomes the defects of the prior art.
The technical scheme for solving the technical problems is as follows:
the utility model provides a fracturing flow back acid liquid on-line neutralization device, includes gas-liquid separation equipment, dewatering device, neutralization powder storage device and mixing reactor, and the liquid phase entry of above-mentioned gas-liquid separation equipment is connected and is switched on with the well head through the medium pipeline, and the gaseous phase export of above-mentioned gas-liquid separation equipment is connected and is linked together with dewatering device's inlet connection through first pipeline, and neutralization powder storage device's powder export is connected and is linked together with mixing reactor's medium entry through the second pipeline, and mixing reactor's output is connected with pumping device, and its input is connected with the liquid phase export of above-mentioned gas-liquid separation equipment through the third pipeline.
On the basis of the technical scheme, the invention can be improved as follows.
Further, the apparatus further comprises a neutralizing powder adding device connected to the neutralizing powder storing device for adding powder to the neutralizing powder storing device.
Further, the neutralizing powder adding device comprises a medicine storage box and a screw conveyor, wherein a feed inlet of the screw conveyor is connected and communicated with an outlet of the medicine storage box, and a discharge outlet of the screw conveyor is connected and communicated with the inside of the neutralizing powder storage device.
Further, the above-mentioned mixing reactor is a venturi mixer, and its negative pressure port constitutes its medium inlet.
Further, the dehydration device is a dehydration tank, the bottom of the dehydration tank is connected with an evacuation pipeline with a valve, the top of the dehydration tank is provided with a dry gas outlet, and the inside of the tank body is filled with a drying agent for absorbing water in the acid gas in the flow back.
Further, the second pipeline is an n-shaped bent pipe, and the highest point of the bent pipe is higher than the liquid level in the gas-liquid separation equipment.
Further, the medium pipeline is communicated with a pressure reducing valve.
Further, the online control system comprises a controller, an electronic liquid level meter, a pH online detector, an electronic flowmeter, a vacuum pressure meter, a first electronic control flow valve and a second electronic control flow valve which are respectively and electrically connected with the controller, wherein the electronic liquid level meter and the pH online detector are respectively arranged on the gas-liquid separation equipment and used for monitoring the liquid level and the pH value of the liquid in the gas-liquid separation equipment, the electronic flowmeter and the first electronic control flow valve are communicated and arranged on the third pipeline, and the vacuum pressure meter and the second electronic control flow valve are communicated and arranged on the second pipeline.
Further, the pumping device is a variable-frequency self-priming pump and is connected with the controller.
The beneficial effects of the invention are as follows: the method can effectively neutralize the residual acid in the flowback fluid in the pipeline, reduce the acidity and corrosiveness of the flowback fluid, and reduce the subsequent treatment difficulty, the treatment cost and the environmental risk.
Drawings
FIG. 1 is a schematic structural view of an on-line neutralizing device for fracturing flowback acid liquid of the invention;
fig. 2 is a schematic diagram of the pipeline connection of the fracturing flowback acid on-line neutralization device of the invention.
In the drawings, the list of components represented by the various numbers is as follows:
1. a gas-liquid separation device; 2. a dehydration device; 3. neutralizing the powder storage device; 4. a mixing reactor; 5. a pumping device; 6. a neutralization powder adding device; 8. a pressure reducing valve; 61. a medicine storage box; 62. a screw conveyor; 71. a controller; 72. an electronic level gauge; 73. a pH on-line detector; 74. an electronic flowmeter; 75. a vacuum pressure gauge; 76. a first electrically controlled flow valve; 77. and a second electrically controlled flow valve.
Detailed Description
The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
Examples: as shown in fig. 1 and 2, the fracturing flowback acid liquid on-line neutralization device of the present embodiment includes a gas-liquid separation device 1, a dehydration device 2, a neutralization powder storage device 3 and a mixing reactor 4, wherein a liquid phase inlet of the gas-liquid separation device 1 is connected and conducted with a wellhead through a medium pipeline, a gas phase outlet of the gas-liquid separation device 1 is connected and communicated with an inlet of the dehydration device 2 through a first pipeline, a powder outlet of the neutralization powder storage device 3 is connected and communicated with a medium inlet of the mixing reactor 4 through a second pipeline (denoted by a in the figure), an output end of the mixing reactor 4 is connected with a pumping device 5, and an input end of the mixing reactor is connected with a liquid phase outlet of the gas-liquid separation device 1 through a third pipeline.
The use process is as follows:
the wellhead flowback fluid enters the gas-liquid separation equipment 1 through a liquid inlet pipeline to carry out gas-liquid separation, wherein the gas phase passes through a pipeline at the top of the gas-liquid separation equipment 1 and enters the dehydration device 2, and is treated and collected by a subsequent process after dehydration treatment; when the liquid level in the gas-liquid separation system reaches a set value, the pumping device 5 is started, negative pressure is formed in a second pipeline in the working process of the pumping device 5, the neutralizing agent (powder) in the neutralizing powder storage device 3 is sucked into the mixing reactor 4, meanwhile, the acid liquor in the gas-liquid separation device 1 is sent into the mixing reactor 4, and the acid liquor is mixed and subjected to neutralization reaction in the mixing reactor 4 and then is conveyed to a rear-end treatment process; in the process, the vacuum degree in the second pipeline can be regulated according to the pH value of the acid liquid in the gas-liquid separation equipment 1 and the flow quantity of the acid liquid flowing out, and parameters such as the rotating speed and the displacement of the real-time pumping device 5, so that the purposes of regulating the dosing rate and the dosing amount are achieved, the whole device is reasonable in structural design, the residual acid in the flowback liquid can be effectively subjected to neutralization reaction in the pipeline, the acidity and corrosiveness of the flowback liquid are reduced, and the subsequent treatment difficulty, the treatment cost and the environmental risk are reduced.
What needs to be stated is: in the above embodiment, the gas-liquid separation apparatus 1 is in the prior art, and a conventional gas-liquid separator is adopted, and specific types and parameters are reasonably selected according to actual use requirements, and the principles and structures thereof are not described herein.
As a preferred embodiment, further comprising a neutralization powder adding device 6, said neutralization powder adding device 6 being connected to said neutralization powder storing device 3 for adding powder to said neutralization powder storing device 3.
In the above embodiment, the neutralizing powder adding device 6 is designed to complete the addition and replenishment of the medicament (powder) into the neutralizing powder storing device 3, which is more advantageous for the good operation of the whole system.
In this embodiment, the neutralizing powder adding device 6 includes a medicine storage box 61 and a screw conveyor 62, a feed inlet of the screw conveyor 62 is connected to and communicates with an outlet of the medicine storage box 61, and a discharge outlet of the screw conveyor 62 is connected to and communicates with the inside of the neutralizing powder storage device 3.
In the above embodiment, the screw conveyor 62 is generally disposed in an inclined manner, and the feeding end thereof is located at a low position, the discharging end thereof is located at a high position, and is connected to the neutralizing powder storage device 3, and in operation, the powder in the medicine storage tank 61 enters the screw conveyor 62, and then, after being lifted, enters the neutralizing powder storage device 3, and in this example, the screw shaft of the screw conveyor 62 is configured to be driven by a motor.
As a preferred embodiment, the mixing reactor 4 is a venturi mixer, and the negative pressure port thereof constitutes the medium inlet thereof.
In the above embodiment, the venturi mixer of the prior art is adopted in the mixing reactor 4, the liquid inlet of the venturi mixer is connected with the gas-liquid separation device 1, the liquid outlet of the venturi mixer is connected with the input end of the pumping device 5, the negative pressure interface of the venturi mixer is connected with the second pipeline, the liquid phase of the gas-liquid separation device 1 enters the mixing reactor 4 through the pipeline in the operation process of the pumping device 5, and negative pressure is generated at the negative pressure interface in the flowing process, so that the powder in the neutralized powder storage device 3 is sucked into the mixing reactor 4 through the second pipeline, and the neutralization reaction of the acid liquid and the neutralized powder in the mixing reactor 4 is completed, so that the acid liquid is neutralized in the pipeline in the subsequent process removal, and the subsequent process difficulty, process cost and environmental risk are reduced.
Of course, the spiral structure can be additionally arranged in the venturi mixer, a plurality of spiral blades are arranged in a staggered mode, and the flow-back liquid and the neutralization powder can generate rotational flow when passing through the spiral blades, so that efficient mixing and reaction are realized.
In this embodiment, the dehydration device 2 adopts a dehydration tank of conventional technology, the bottom of the dehydration tank is connected with an evacuation pipeline with a valve, the top of the dehydration tank is provided with a dry gas outlet, the inside of the tank body is filled with a desiccant (such as anhydrous calcium chloride, which is mainly used for absorbing water in the acid gas of the flowback, for example), the specific structure and principle of the dehydration device belong to the prior art, and specific model and operation parameters are reasonably selected according to actual requirements, and are not described herein.
Of course, other devices having a dewatering effect may be used for the dewatering device 2, including but not limited to the dewatering tank described above.
As a preferred embodiment, the second pipe is an "n" type bent pipe, and the height of the highest point of the bent pipe is higher than the liquid level in the gas-liquid separation apparatus 1.
In the above embodiment, the lower end pipe orifice of one vertical section of the second pipeline is connected with the neutralization powder storage device 3, the lower end pipe orifice of the other vertical section is connected with the mixing reactor 4, and the arc top (i.e. the highest position) of the bent pipe ensures that the liquid level is greater than that in the gas-liquid separation device 1, so that the purpose is that: the liquid in the gas-liquid separation device 1 is prevented from flowing backward into the neutralization powder storage device 3 in the stopped state.
In this embodiment, the neutralized powder storage device 3 may be a conventional sealed container (e.g., a canister, etc.).
In this embodiment, the pressure reducing valve 8 is communicated with the medium pipeline, and the pressure of the wellhead acid flowback liquid can be regulated by operating the pressure reducing valve 8, so that the safety of the pipeline pressure is ensured, the good operation of the whole system is ensured, and the potential safety hazard is reduced.
As a preferred embodiment, the system further comprises an on-line control system, wherein the on-line control system comprises a controller 71, and an electronic liquid level meter 72, a pH on-line detector 73, an electronic flowmeter 74, a vacuum pressure meter 75, a first electric control flow valve 76 and a second electric control flow valve 77 which are respectively electrically connected with the controller 71, the electronic liquid level meter 72 and the pH on-line detector 73 are respectively arranged on the gas-liquid separation device 1 and used for monitoring the liquid level and the liquid pH value therein, the electronic flowmeter 74 and the first electric control flow valve 76 are arranged on the third pipeline in a communicating way, and the vacuum pressure meter 75 and the second electric control flow valve 77 are arranged on the second pipeline in a communicating way.
In the above embodiment, an on-line control system is added to the whole system, and the on-line control system can be used for realizing the automatic operation of the whole system, specifically, the wellhead flowback fluid enters the gas-liquid separation device 1 through the liquid inlet pipeline for gas-liquid separation, wherein the gas phase enters the dehydration device 2 through the pipeline at the top of the gas-liquid separation device 1, and is processed and collected by the subsequent process after dehydration treatment; in the process, the liquid level and the pH value in the gas-liquid separation equipment 1 are respectively monitored in real time by an electronic liquid level meter 72 and a pH online detector 73 and fed back to a controller 71, when the liquid level reaches a set value, the controller 71 controls a pumping device 5 to start, in the working process of the pumping device 5, the controller 71 adjusts the rotating speed, the displacement and the opening degree of a first electric control flow valve 76 of the pumping device 5 in real time according to the pH value, the electronic flow meter 74 and data monitored by a vacuum pressure meter 75, and a proper negative pressure is formed in a second pipeline, so that the neutralizing agent (powder) in a neutralizing powder storage device 3 is sucked into a mixing reactor 4, and is conveyed to a rear-end treatment process after the mixing and neutralizing reaction is carried out; in addition, according to the pH value and the flow, the online control system can adjust the rotation speed and the displacement of the pumping device 5 and the opening of the first electric control flow valve 76 and the second electric control flow valve 77 in real time, so as to control the vacuum degree in the second pipeline, thereby achieving the purpose of adjusting the dosing rate and the dosing quantity.
As a preferred embodiment, the pumping device 5 is a variable frequency self priming pump, and is connected to the controller 71.
In the above embodiment, negative pressure can be generated at the suction end of the variable frequency self-priming pump during operation, the powder neutralizing agent in the neutralizing powder storage device 3 is sucked into the mixing reactor 4, and automatic start-up operation and shutdown operation are realized through the controller 71, and the working parameters of the variable frequency self-priming pump can be adjusted according to the parameters of other detection instruments.
The supplementary ones are: in this embodiment, the entire neutralization apparatus may be mounted on a carrier (denoted by M in the figure) for easy transportation, and the carrier may be a rack, a transportation vehicle, or the like.
Compared with the prior art, the fracturing flow-back acid liquid on-line neutralization device of the embodiment mainly has the following advantages:
1) The automatic feedback control technology is adopted, the dosing amount and the dosing rate are automatically adjusted based on the pH value and the flow of the wellhead flowback fluid, the degree of automation is high, and the labor intensity of operators is low;
2) The neutralizing agent is powder, the total amount of flowback liquid is not increased, and the neutralizing agent is easy to store and manage on site;
3) The device is directly connected with a wellhead blowout pipeline, the neutralizing agent completes mixing and neutralization reaction in a pipeline, the reaction rate is high, and the waste of the agent is small;
4) The device comprises a gas purifying and dehydrating device, can effectively absorb moisture in gas, and is beneficial to the terminal recovery of oil gas resources such as natural gas, shale gas and the like.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (9)
1. An online neutralization device of fracturing flow-back acid liquid is characterized in that: including gas-liquid separation equipment (1), dewatering device (2), neutralization powder storage device (3) and mixing reactor (4), the liquid phase entry of gas-liquid separation equipment (1) is connected and is switched on with the well head through the medium pipeline, the gas phase export of gas-liquid separation equipment (1) through first pipeline with the access connection and the intercommunication of dewatering device (2), the powder export of neutralization powder storage device (3) through the second pipeline with the medium entry connection and the intercommunication of mixing reactor (4), the output of mixing reactor (4) is connected with pumping device (5), and its input is passed through the third pipeline and is connected the liquid phase export of gas-liquid separation equipment (1).
2. The fracturing flowback acid online neutralization device according to claim 1, wherein: the device also comprises a neutralization powder adding device (6), wherein the neutralization powder adding device (6) is connected with the neutralization powder storage device (3) and is used for adding powder into the neutralization powder storage device (3).
3. The fracturing flowback acid online neutralization device according to claim 2, wherein: the neutralization powder adding device (6) comprises a medicine storage box (61) and a screw conveyor (62), wherein a feed inlet of the screw conveyor (62) is connected and communicated with an outlet of the medicine storage box (61), and a discharge outlet of the screw conveyor (62) is connected and communicated with the interior of the neutralization powder storage device (3).
4. The fracturing flowback acid online neutralization device according to claim 1, wherein: the mixing reactor (4) is a Venturi mixer, and the negative pressure port of the mixing reactor forms a medium inlet of the mixing reactor.
5. The fracturing flowback acid online neutralization device according to claim 1, wherein: the dehydration device (2) is a dehydration tank, the bottom of the dehydration tank is connected with an evacuation pipeline with a valve, the top of the dehydration tank is provided with a dry gas outlet, and the inside of the tank body is filled with a drying agent for absorbing water in the acid gas in the flow back.
6. The fracturing flowback acid online neutralization device according to claim 1, wherein: the second pipeline is an n-shaped bent pipe, and the highest point of the bent pipe is higher than the liquid level in the gas-liquid separation equipment (1).
7. The fracturing flowback acid online neutralization device according to claim 1, wherein: and the medium pipeline is communicated with a pressure reducing valve (8).
8. The fracturing flowback fluid online neutralization apparatus according to any one of claims 1 to 7, characterized in that: the online control system comprises a controller (71) and an electronic liquid level meter (72), a pH online detector (73), an electronic flowmeter (74), a vacuum pressure meter (75), a first electronic control flow valve (76) and a second electronic control flow valve (77), wherein the electronic liquid level meter (72) and the pH online detector (73) are respectively arranged on the gas-liquid separation equipment (1) and used for monitoring the liquid level and the pH value of liquid in the gas-liquid separation equipment, the electronic flowmeter (74) and the first electronic control flow valve (76) are communicated and arranged on a third pipeline, and the vacuum pressure meter (75) and the second electronic control flow valve (77) are communicated and arranged on the second pipeline.
9. The fracturing flowback fluid on-line neutralization apparatus of claim 8, wherein: the pumping device (5) is a variable-frequency self-priming pump and is connected with the controller (71).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210173400.7A CN116693027A (en) | 2022-02-24 | 2022-02-24 | Online neutralization device for fracturing flow-back acid liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210173400.7A CN116693027A (en) | 2022-02-24 | 2022-02-24 | Online neutralization device for fracturing flow-back acid liquid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116693027A true CN116693027A (en) | 2023-09-05 |
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ID=87828039
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210173400.7A Pending CN116693027A (en) | 2022-02-24 | 2022-02-24 | Online neutralization device for fracturing flow-back acid liquid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116693027A (en) |
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2022
- 2022-02-24 CN CN202210173400.7A patent/CN116693027A/en active Pending
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