Movable skid-mounted fracturing flow-back fluid treatment device

Abstract

The utility model discloses a movable skid-mounted fracturing flow-back fluid treatment device which comprises a pretreatment device, a skid-mounted device and a control device, wherein the pretreatment device is used for carrying out gel breaking on incoming water and adjusting the PH (Potential of Hydrogen) value; the dosing coagulating sedimentation device is used for carrying out solid-liquid separation through coagulating sedimentation; the efficient air flotation device is used for separating suspended matters and emulsified oil; and the multi-stage filtering device is used for removing emulsified oil, chromaticity, suspended matters and metal ions. The device is skid-mounted in a complete set, movable, low in investment, short in construction period and small in occupied area; the device mainly treats through physical and chemical methods, and the operation is simple and easy to learn; the device integrates combustible gas detection and hydrogen sulfide detection, and can be linked with complete equipment, so that the operation safety is realized, and the explosion risk is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil and gas field fracturing flowback fluid processing technical field especially relates to a kind of movable pry mounted fracturing flowback fluid processing device. BACKGROUND

[0002] Fracturing flowback fluid is one of main pollution sources of petroleum and natural gas enterprises, and is used in large quantity in the whole oil exploitation process, and the generated flowback fluid is large in quantity.Because of its characteristics such as large viscosity, high suspended matter content, high oil content and high chemical additive content, it is difficult to process.

[0003] In the fracturing process of oil and gas field, the fracturing fluid used mainly includes guanidium gum, polymer, high and low viscosity slick water, and some chemical additives, mainly including acid liquor, scale inhibitor, thickening agent, surfactant, bactericide and the like, and the specific content is different;Some substances come from formation.

[0004] Therefore, from the angle of energy saving, emission reduction, cost reduction and efficiency increase, compared with the strict requirements of the state on environmental protection in recent years, in view of this situation, our company explores a set of movable processing device for fracturing flowback fluid of oil and gas field.The main feature of the present application is that the fracturing flowback fluid generated in the exploitation process of oil and gas field can be treated and injected after treatment, water injection for oil displacement increases oil production, saves fresh water usage, reduces production cost of construction unit, and can produce great economic benefits.The design mode of complete device is movable pry mounted insulation mode, which can meet the requirements of oil field development mobility and the needs of winter construction. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a kind of movable pry mounted fracturing flowback fluid processing device to solve the above technical problems.

[0006] To achieve the above object, the utility model adopts the following technical solutions:

[0007] A kind of movable pry mounted fracturing flowback fluid processing device, comprising:

[0008] Pretreatment device for gel breaking and adjusting PH value to incoming water;

[0009] Addition coagulation sedimentation device for coagulation sedimentation and solid-liquid separation;

[0010] Efficient air floatation device for separating suspended matter and emulsified oil;

[0011] Multi-stage filtration device for removing emulsified oil, colority, suspended matter and metal ions.

[0012] The pre-treatment device is equipped with an electric control cabinet A, two dosing barrels, two stirrers, a lifting pump A, is provided with an adjusting valve and a water inlet at the top, is provided with an overflow port at the upper portion, and is provided with a sand cleaning door at the lower portion, and the two dosing barrels are equipped with three dosing pumps.

[0013] The dosing coagulation and precipitation device is equipped with a dosing device, four coagulation stirrers, a set of inclined plate sedimentation and is equipped with 3-5 hoppers, 3 electric heaters A, 2 anti-explosion lighting lamps, and 1 anti-explosion air exchanger; the dosing coagulation and precipitation device is provided with a water inlet pipe and a water outlet pipe at the upper portion, is provided with a sludge discharge pipe at the lower portion, and the sludge discharge pipe is provided with 3-5 electric sludge discharge valves; the dosing device comprises six dosing bins, six stirrers, 6-8 dosing pumps, and a set of electric control cabinet B.

[0014] The high-efficiency air flotation device is equipped with a dissolved air pump, an acid washing device, a buffer tank, 2 lifting pumps B, 1 slag scraping device, 1 static pressure liquid level meter, 1 electric control device C, 2 electric heaters B, 2 anti-explosion lighting lamps, and 1 anti-explosion air exchanger; the buffer tank is provided with a shockproof pressure gauge A, and is also provided with a slag discharge pipe, a water outlet pipe and a slag flow pipe.

[0015] The multi-stage filtration device is equipped with 1 electric control device D, 1 backwashing pump, 12 electric valves, 3 vent pipes, 2 electric heaters C, 2 anti-explosion lighting lamps and 6 shockproof pressure gauges B; the top of the multi-stage filtration device is provided with lifting lugs.

[0016] Compared with the prior art, the device has the following advantages: the device is complete and can be moved, has low investment, short construction period and small land occupation; the device mainly uses physical and chemical methods for treatment, and is simple to operate; the device can be moved and relocated, and has a heat preservation house body, so that winter construction can be carried out; the device can be modularized and matched according to the requirements of customers to form a VOCs treatment device, so as to meet the environmental protection requirements. The integrated device can detect flammable gas and hydrogen sulfide, and can be linked with the complete equipment to realize safe operation and prevent explosion risk. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structure diagram schematic view of the pre-treatment device of the utility model;

[0018] Figure 2 It is a structure diagram schematic view of the dosing coagulation and precipitation device of the utility model;

[0019] Figure 3 It is a structure diagram schematic view of the high-efficiency air flotation device of the utility model;

[0020] Figure 4 It is a structure diagram schematic view of the multi-stage filtration device of the utility model;

[0021] In the diagram: 1. Pretreatment device; 2. Chemical dosing, coagulation, and sedimentation device; 3. High-efficiency air flotation device; 4. Multi-stage filtration device; 11. Electrical control cabinet A; 12. Chemical dosing tank; 13. Agitator; 14. Booster pump A; 15. Regulating valve; 16. Inlet; 17. Overflow port; 18. Sand removal valve; 21. Chemical dosing device; 22. Coagulation agitator; 23. Electric heater A; 24. Inlet pipe; 25. Outlet pipe; 26. Sludge discharge pipe; 27. Electric sludge discharge valve; 28. Electric... Control cabinet B, 31 dissolved air pump, 32 pickling device, 33 buffer tank, 34 lift pump B, 35 slag scraping device, 36 static pressure level gauge, 37 electrical control device C, 38 electric heater B, 39 shock-resistant pressure gauge A, 310 slag discharge pipe, 311 water outlet pipe, 312 slag flow pipe, 41 electrical control device D, 42 backwash pump, 43 electric valve, 44 vent pipe, 45 electric heater C, 46 shock-resistant pressure gauge B, 47 lifting lug. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0023] A mobile skid-mounted fracturing flowback fluid treatment device includes:

[0024] A pretreatment device for breaking down the gel and adjusting the pH value of incoming water;

[0025] A chemical dosing coagulation and sedimentation device that separates solids and liquids through coagulation and sedimentation.

[0026] A high-efficiency air flotation device for separating suspended solids and emulsified oil;

[0027] A multi-stage filtration device for removing emulsified oil, color, suspended solids, and metal ions.

[0028] The pretreatment device is equipped with an electrical control cabinet A, two dosing tanks, two agitators, and one booster pump A. The top of the pretreatment device has a regulating valve and a water inlet, an overflow outlet at the top, and a sand removal door at the bottom. The two dosing tanks are equipped with three dosing pumps. The device dimensions are: length 1000mm-5500mm; width 1000mm-3231mm; height 500mm-2064mm.

[0029] The chemical dosing coagulation sedimentation unit is equipped with one dosing device, four coagulation agitators, one inclined plate sedimentation system with 3-5 sludge hoppers, three electric heaters (A), two explosion-proof lights, and one explosion-proof ventilation fan. The unit has an inlet and outlet pipe at the top and a sludge discharge pipe at the bottom, equipped with 3-5 electric sludge discharge valves. The dosing device includes six dosing chambers, six agitators, six-8 dosing pumps, and one electrical control cabinet (B). Its function is to mix dry powders of pH adjusters, PAM, PAC, and ion removal agents with water to a suitable concentration, then pump the prepared solution to each dosing port. Through coagulation and sedimentation, solid-liquid separation occurs; the solid phase is discharged to the sludge tank, and the liquid phase flows to the next process stage. Equipment dimensions: length 1000mm-12500mm; width 1000mm-3000mm; height 500mm-3300mm.

[0030] The high-efficiency air flotation device is equipped with a dissolved air pump, an acid washing device, a buffer tank, two lift pumps B, a slag scraping device, a static pressure level gauge, an electrical control device C, two electric heaters B, two explosion-proof lights, and an explosion-proof ventilation fan. The buffer tank is equipped with a shock-resistant pressure gauge A, as well as a slag discharge pipe, a water outlet pipe, and a slag flow pipe.

[0031] Its function is to: use an imported dissolved air system for the liquid phase in the sedimentation device to ensure that the generated bubbles reach the micron level and are stable. These microbubbles encapsulate and float emulsified oil and suspended solids in the water to the surface, where they are then removed by a skimming system. Equipment dimensions: Length 1000mm-10000mm; Width 1000mm-3000mm; Height 1000mm-3300mm.

[0032] The multi-stage filtration unit is equipped with one electrical control device (D), one backwash pump, 12 electric valves, three vent pipes, two electric heaters (C), two explosion-proof lights, and six shock-resistant pressure gauges (B). The top of the multi-stage filtration unit is equipped with lifting lugs. Its function is to pump water from the flotation unit into the filtration unit via a booster pump. Through the different packing materials filled in the filter, emulsified oil, color, suspended solids, and metal ions in the water are further removed. Equipment dimensions: Length 1000mm-8000mm; Width 1000mm-3000mm; Height 1000mm-3300mm.

[0033] The operation steps of this utility model are as follows:

[0034] The collected fracturing flowback fluid from oil and gas fields is transported to storage ponds by road or pipeline;

[0035] pH adjustment and gel breaking are carried out in the pretreatment unit;

[0036] Solid-liquid separation is carried out in a chemical dosing coagulation and sedimentation device;

[0037] The separation of suspended matter and emulsified oil is carried out in the high-efficiency air floatation device.

[0038] The removal of emulsified oil, colority, suspended matter and metal ions is carried out in the multi-stage filtering device.

[0039] The treated clean water can be used for water injection oil displacement; and the whole process can be automatically controlled.

[0040] The above is the preferred embodiment of the present application, and for those skilled in the art, according to the teaching of the present application, the changes, modifications, replacements and variations of the embodiments without departing from the principles and spirits of the present application still fall into the protection scope of the present application.

Claims

1. A mobile skid-mounted fracturing flowback fluid treatment device, characterized in that, It comprises: pretreatment device for breaking glue and adjusting PH value of incoming water; coagulation and sedimentation device for solid-liquid separation by coagulation and sedimentation; high-efficiency air floatation device for separating suspended matter and emulsified oil; multistage filtration device for removing emulsified oil, color, suspended matter and metal ions.

2. A mobile skid-mounted fracturing flowback fluid treatment device as claimed in claim 1, characterized in that, The pretreatment device is equipped with electric control cabinet A, two dosing barrels, two mixers, one lifting pump A, and is provided with adjusting valve, water inlet at the top, overflow port at the upper part and sand cleaning door at the lower part, wherein the two dosing barrels are equipped with three dosing pumps.

3. A mobile skid-mounted fracturing flowback fluid treatment device as claimed in claim 1, characterized in that, The coagulation and sedimentation device is equipped with one dosing device, four coagulation mixers, three electric heaters A, and is provided with water inlet pipe and water outlet pipe at the upper part and sludge discharge pipe at the lower part, wherein the sludge discharge pipe is provided with 3-5 electric sludge discharge valves, the dosing device comprises six dosing bins, six mixers, six-eight dosing pumps and one set of electric control cabinet B.

4. The mobile skid-mounted fracturing flowback fluid treatment device of claim 1, wherein, The high-efficiency air floatation device is equipped with one dissolved air pump, acid washing device, buffer tank, two lifting pumps B, one slag scraping device, one static pressure liquid level meter, one electric control device C and two electric heaters B, and is provided with shockproof pressure gauge A, slag discharge pipe, water outlet pipe and slag flow pipe.

5. A mobile skid-mounted fracturing flowback fluid treatment device as defined in claim 1, wherein, The multistage filtration device is equipped with one electric control device D, one backwashing pump, twelve electric valves, three vent pipes, two electric heaters C and six shockproof pressure gauges B, and is provided with lifting lugs at the top.

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