Separator and dry powder continuous mixing equipment

Abstract

The utility model relates to the technical field of oil field fracturing operation, in particular to a separator and dry powder continuous mixing equipment. Wherein the separator comprises a separator main body, the separator main body is provided with a liquid inlet end and a discharge end in the length direction, and a cavity is formed in the separator main body; the first liquid inlet is positioned at the liquid inlet end and is used for introducing an external solution; the first discharge port is positioned at the discharge end and is used for discharging the mixed solution; the spiral flow deflector extends from the liquid inlet end to the discharge end and is used for increasing the stroke of the solution in the cavity; and the first liquid inlet and the first outlet are both eccentrically arranged. According to the technical scheme, the first liquid inlet and the first discharge port are eccentrically arranged, so that the stroke of a solution in the separator can be increased, the solution is greatly impacted by the pipe wall in the separator, and the mixing effect is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil field fracturing operation, in particular to a separator and a dry powder continuous mixing device. BACKGROUND

[0002] Oil field fracturing fluid is a key working fluid for increasing production of oil and gas wells and injection of water wells, which is injected into the formation by high pressure to form a fracture and carry proppant to fill, so as to improve the oil and gas flow channel, usually including water-based fracturing fluid, oil-based fracturing fluid and the like.

[0003] The preparation of water-based fracturing fluid is difficult, usually requiring mixing of dry powder such as polyacrylamide with water to obtain a solution with a specific concentration or viscosity, and the ideal mixing effect cannot be achieved by one-time mixing in a mixer.

[0004] Therefore, there is an urgent need in the art for a separator capable of improving the mixing efficiency of dry powder to solve the above technical problems.

[0005] In view of this, the present application is proposed. SUMMARY

[0006] The present application aims to provide a separator and a dry powder continuous mixing device to solve at least one technical problem mentioned in the background.

[0007] Specifically, the first aspect of the present application provides a separator for improving the mixing effect of a solution, comprising:

[0008] a separator body having a liquid inlet end and a discharge end in the length direction thereof, and a cavity formed inside the separator body;

[0009] a first liquid inlet at the liquid inlet end for introducing an external solution;

[0010] a first discharge port at the discharge end for discharging the mixed solution;

[0011] a spiral guide vane extending from the liquid inlet end to the discharge end for increasing the travel of the solution inside the cavity and forming a liquid passage in the middle of the separator;

[0012] wherein the first liquid inlet and the first discharge port are arranged in a staggered manner with the liquid passage.

[0013] By eccentrically arranging the first liquid inlet and the first discharge port, the travel of the solution inside the separator can be increased, and the solution can be subjected to greater impact from the pipe wall inside the separator, thereby improving the mixing effect.

[0014] Preferably, the separator body has a pipe upper end and a pipe lower end in the height direction thereof, and the first liquid inlet and the first discharge port are arranged close to the pipe lower end.

[0015] Preferably, the separator further comprises a first exhaust port located on the upper end of the tube body.

[0016] Preferably, the separator further comprises a first liquid inlet pipe, one end of which is connected to the first liquid inlet, and the other end extends away from the separator.

[0017] Preferably, the separator further comprises a first discharge pipe, one end of which is connected to the first discharge port, and the other end extends away from the separator.

[0018] Preferably, the separator further comprises a first exhaust pipe, one end of which is connected to the first exhaust port, and the other end is arranged substantially parallel to the length direction of the separator.

[0019] Preferably, the separator further comprises an ear, which is located near the lower end of the tube body, and the distance between the ear and the liquid inlet is smaller than the distance between the first exhaust pipe and the liquid inlet.

[0020] Preferably, the first exhaust port is located between two adjacent spiral fins and is closer to the first liquid inlet than the first discharge port, and does not intersect the trajectory or the extension of the trajectory of the solution along the spiral guide fin.

[0021] Preferably, the inner diameter of the first liquid inlet is 50-80mm, and / or the inner diameter of the first discharge port is 150-200mm.

[0022] Preferably, the pitch of the spiral guide fin is 10-15cm.

[0023] The second aspect of the present application provides a continuous dry powder mixing device, comprising:

[0024] a dry powder storage device, comprising a storage tank for storing dry powder,

[0025] a fracturing fluid mixing device, comprising a device chamber, the device chamber comprising a lifting shunt system, the lifting shunt system comprising a first liquid inlet pipeline, a liquid inlet pump, and a first liquid inlet pipeline connected in sequence, the liquid inlet pump pumping the liquid in the first liquid inlet pipeline to the dry powder mixing system at a higher position through the first liquid inlet pipeline;

[0026] the dry powder mixing system comprises a first mixing mechanism, the first mixing mechanism having a first powder inlet, a first liquid inlet, and a first discharge port;

[0027] the first mixing mechanism comprises a first mixer, the first liquid inlet of which is connected to the first liquid inlet pipeline; the first powder inlet is connected to the storage tank through a dry powder conveying pipeline; the first mixer forms a negative pressure inside to mix the dry powder and the liquid to form a first mixed solution;

[0028] The first mixing mechanism further comprises a first separator detachably connected with the first mixer, the first separator being used for degassing and further mixing the first mixed solution to form a second mixed solution, and discharging the second mixed solution from the first outlet to the equipment chamber;

[0029] The first separator is the separator of the first aspect of the present application.

[0030] Preferably, the dry powder storage device further comprises a screw conveyor and a buffer bin, the screw conveyor being used for conveying the dry powder in the storage tank to the buffer bin, and the dry powder being conveyed from the first powder outlet of the buffer bin to the dry powder conveying pipeline.

[0031] Preferably, the buffer bin has an internal cavity with a certain volume to avoid discontinuous dry powder conveying caused by rapid extraction of the dry powder; further, the buffer bin further has a first air inlet arranged at the opposite side of the first powder outlet to provide external atmospheric pressure for the dry powder conveying pipeline.

[0032] Preferably, the storage tank has a fluidized bed arranged at the bottom of the storage tank, the fluidized bed being used for conveying the dry powder to the screw conveyor, the screw conveyor being arranged transversely and comprising a second powder inlet in communication with the fluidized bed and a second powder outlet in communication with the buffer bin.

[0033] Preferably, the dry powder continuous mixing equipment further comprises a fixing frame, the fixing frame having a first fixing plate arranged at the top of the fixing frame, and the dry powder storage device being connected with the first fixing plate only through the storage tank at the top of the storage tank.

[0034] Preferably, the fracturing fluid mixing device further comprises an operation chamber arranged adjacent to the equipment chamber. The operation chamber comprises first and second wall plates arranged oppositely, the first wall plate being provided with a lockable first door body for isolating the internal and external environments of the operation chamber; the equipment chamber comprises third and fourth wall plates arranged oppositely, the fourth wall plate being provided with a lockable second door body for isolating the internal and external environments of the equipment chamber, and the first and fourth wall plates being located on two opposite sides.

[0035] Preferably, the third wall plate is provided with a first support plate, the first support plate being hinged with the third wall plate and having a first position and a second position, the first support plate being located in a vertical direction when the first support plate is located at the first position, and the first support plate being located at a substantially perpendicular angle with the third wall plate when the first support plate is located at the second position.

[0036] Preferably, the first liquid inlet pipeline is connected with a first side of a liquid inlet pump, a second side of the liquid inlet pump is connected with the first liquid outlet pipeline, the first side and the second side being adjacent to each other; the first liquid outlet pipeline comprises first and second bending structures located at two ends, and a straight pipeline body located between the first and second bending structures.

[0037] Preferably, the first liquid outlet is in communication with the first liquid inlet of the first separator.

[0038] Preferably, the dry powder mixing system comprises a second mixing mechanism spaced apart from the first mixing mechanism, the second mixing mechanism comprising a second mixer and a second separator arranged in sequence, the second mixer comprising a second powder inlet, a second liquid inlet, a second liquid outlet, the second separator comprising a second liquid inlet, a second discharge outlet, a second exhaust pipe, the second liquid outlet being in communication with the second liquid inlet; wherein the second mixer is the mixer of the first aspect of the application.

[0039] Preferably, the first powder inlet has a smaller inner diameter than the second powder inlet, and the first liquid inlet has a smaller inner diameter than the second liquid inlet.

[0040] Preferably, the second bending structure is connected to a flow divider at the end, the flow divider divides the water into at least two paths, and the liquid is sent to the first liquid inlet and the second liquid inlet through the first lifting pipe and the second lifting pipe respectively, wherein the first lifting pipe and the second lifting pipe have different diameters.

[0041] Preferably, the equipment chamber further comprises a lifting mechanism for adjusting the height of the mixing mechanism, the lifting mechanism comprising a driving device and a mounting frame, the driving device comprising a first lifting rod mounted on the third wall plate and a first power device for driving the first lifting rod.

[0042] Preferably, the first lifting rod comprises a fixed rod and a telescopic rod which is movably connected to the fixed rod, under the driving of the first power device, the telescopic rod is movable relative to the fixed rod in the length direction of the telescopic rod and forms at least a first position and a second position.

[0043] Preferably, the first mixer and the second mixer are fixedly arranged at one end of the mounting frame close to the third wall plate, and the first separator and the second separator are fixedly arranged at one end of the mounting frame close to the fourth wall plate.

[0044] Preferably, the mounting frame comprises a first horizontal rod, the two ends of the first horizontal rod are connected to a first vertical rod and a second vertical rod respectively, the telescopic rod is fixedly connected to a first mounting position of the first horizontal rod, and the mounting frame further comprises a first inclined rod and a second inclined rod, one end of the first inclined rod is fixed to one side of the first mounting position, and the other end is fixed to the first vertical rod, one end of the second inclined rod is fixed to the other side of the first mounting position, and the other end is fixed to the second vertical rod.

[0045] Preferably, the driving device comprises a second lifting rod mounted on the fourth wall plate, and a second power device for driving the second lifting rod, the mounting frame comprises a second horizontal rod symmetrically arranged with the first horizontal rod, and the second lifting rod is fixed to the second horizontal rod; two vertical rods are arranged in parallel at two ends of the second horizontal rod, the second lifting rod is fixedly connected to a second mounting position of the second horizontal rod, and the mounting frame further comprises a third inclined rod and a fourth inclined rod, one end of each of the third inclined rod and the fourth inclined rod is connected to the two vertical rods arranged in parallel, and the other end of each of the third inclined rod and the fourth inclined rod is fixed to the two sides of the second mounting position.

[0046] Preferably, the mounting frame has an adjustable baffle at the top end, and the adjustable baffle comprises a first cover body, a second cover body and a third cover body arranged in sequence, and the first cover body and the third cover body are hingedly connected to the second cover body, so that the first cover body and the third cover body can rotate away from the equipment room relative to the second cover body.

[0047] Preferably, the mounting frame has a first cavity formed by the top end, and the first mixer and the second mixer are arranged in the first cavity, and part of the second pipe body and the third pipe body is located outside the first cavity.

[0048] Preferably, the mounting frame has a horizontally arranged bearing shaft on the side close to the second lifting rod, and the first separator and the second separator are respectively provided with a first lug and a second lug on the outer wall, the first lug and the second lug are sleeved on the bearing shaft and can rotate around the bearing shaft.

[0049] In summary, the present application has the following beneficial effects:

[0050] First, the separator provided by the present application can improve the travel of the solution in the separator by eccentrically arranging the first liquid inlet and the first discharge port, and can make the solution in the separator receive greater impact from the pipe wall, thereby improving the mixing effect.

[0051] Second, the separator provided by the present application can avoid the solution from splashing out of the first exhaust port when the solution moves with the spiral flow guide vane by staggering the position of the first exhaust port with the trajectory of the solution, thereby ensuring the mixing effect of the solution in the separator.

[0052] Third, the dry powder continuous mixing device provided by the present application can adapt to different scenes and different needs of fracturing fluid configuration by arranging two groups of mixing mechanisms with different specifications, thereby improving the adaptability of the device, and when the two groups of mixing mechanisms are used at the same time, the liquid preparation efficiency can be improved, and the time cost of liquid preparation can be effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0053] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0054] Figure 1 This is a schematic diagram of the separator in some embodiments of this application;

[0055] Figure 2 This is a cross-sectional view of the separator in some embodiments of this application;

[0056] Figure 3 This is a schematic diagram of a continuous dry powder mixing device from a first angle in some embodiments of this application;

[0057] Figure 4 This is a schematic diagram of a continuous dry powder mixing device from a second perspective in some embodiments of this application;

[0058] Figure 5 This is a side view of a continuous dry powder mixing device in some embodiments of this application;

[0059] Figure 6 This is a schematic diagram of a dry powder storage device in some embodiments of this application;

[0060] Figure 7 This is a schematic diagram of the lifting and diversion system and the dry powder mixing system at a first angle inside the equipment room in some embodiments of this application;

[0061] Figure 8 This is a schematic diagram of the lifting and diversion system and the dry powder mixing system at the second angle inside the equipment room in some embodiments of this application;

[0062] Figure 9 This is a first side view of a fracturing fluid mixing apparatus in some embodiments of this application;

[0063] Figure 10 for Figure 9 A cross-sectional view at angle AA;

[0064] Figure 11 This is a second side view of a fracturing fluid mixing apparatus in some embodiments of this application;

[0065] Figure 12 for Figure 11 A cross-sectional view at the CC angle;

[0066] Figure 13 This is a schematic diagram of the interior of the operating room in some embodiments of this application;

[0067] Figure 14 is a front view of a fracturing fluid mixing device in some embodiments of the present application;

[0068] Figure 15 is a schematic view of a support mode of a separator in some embodiments of the present application;

[0069] Figure 16 is a sectional view of a mixer in some embodiments of the present application;

[0070] Figure 17 is a sectional view of a mixer in some embodiments of the present application.

[0071] Explanation of reference signs

[0072] The technical solutions of the present application can be more clearly understood and explained in combination with the embodiments of the present application through the above explanation of reference signs.

[0073] 100, dry powder storage device; 110, storage tank; 120, screw conveyor; 130, buffer bin; 131, first powder outlet; 132, first gas inlet;

[0074] 200, fracturing fluid mixing device;

[0075] 210, equipment room;

[0076] 211, lifting and distributing system; 2111, first liquid inlet pipeline; 2112, liquid inlet pump; 2113, first liquid upward pipeline; 21131, first bending structure; 21132, second bending structure; 21133, straight pipeline body; 2114, water inlet; 2115, distributor; 2116, first lifting pipeline; 2117, second lifting pipeline;

[0077] 212, dry powder mixing system; 2121, first mixer; 21211, first powder inlet; 21212, first liquid inlet; 21213, first liquid outlet; 2122, first separator; 21221, first discharge outlet; 21222, first liquid inlet; 21223, first gas outlet; 21224, first lug; 21225, helical guide vane; 21226, liquid passage; 2123, second mixer; 21231, second powder inlet; 21232, second liquid inlet; 21233, second liquid outlet; 2124, second separator; 21241, second discharge outlet; 21242, second liquid inlet; 21243, second gas outlet; 21244, second lug;

[0078] 213, lifting mechanism; 2131, mounting frame; 21311, first horizontal rod; 21312, first vertical rod; 21313, second vertical rod; 21314, first inclined rod; 21315, second inclined rod; 21316, second horizontal rod; 2132, first lifting rod; 21321, fixed rod; 21322, telescopic rod; 21323, rocker; 2134, second lifting rod; 2136, first cavity; 2137, bearing shaft; 2138, first support position;

[0079] 214, liquid adding pump;

[0080] 215, third wall plate; 2151, first support plate; 216, fourth wall plate; 2161, second door body;

[0081] 220, operation chamber; 221, first wall plate; 2211, first door body; 222, second wall plate; 225, distribution box; 226, operation cabinet; 227, temperature adjusting device; 228, flow meter; 230, first partition plate;

[0082] 300, fixing frame; 310, first mounting plate;

[0083] 410, first pipe body; 411, bending part; 4111, first opening; 4112, second opening; 4113, first mixing position; 412, extension part; 420, second pipe body; 421, first pipe end; 422, second pipe end; 423, first drainage result; 430, third pipe body; 431, first mixing promoting structure; 440, first liquid inlet pipe; 450, first discharge pipe; 460, first exhaust pipe;

[0084] 501, first cover body; 502, second cover body; 503, third cover body;

[0085] 610, first support frame;

[0086] 710, air compressor; 720, dryer; 730, compressed air tank;

[0087] 810, first baffle;

[0088] 900, dry powder delivery pipeline; 910, mixed liquid delivery pipeline. DETAILED DESCRIPTION

[0089] The exemplary embodiments will be described in detail herein with reference to the attached drawings. The description below refers to the accompanying drawings, which show, by way of example, specific embodiments with which this application can be practiced. The following description is not to be taken in a limiting sense but is made merely for the purpose of describing the general nature of the application. The various embodiments described herein are intended to be illustrative of the application and not restrictive of its intended usage. The described embodiments are merely examples of apparatus and methods that are consistent with some aspects of the application as described in the appended claims.

[0090] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0091] The application will be described in detail herein with reference to the attached drawings and specific embodiments.

[0092] Oilfield fracturing fluid is a key working fluid for increasing production of oil and gas wells and injection of water wells. It is injected into the formation under high pressure to form a fracture and carry proppant to fill it, so as to improve the oil and gas flow channel. It usually includes water-based fracturing fluid, oil-based fracturing fluid and the like. The preparation of water-based fracturing fluid is difficult. Usually, dry powder such as polyacrylamide is mixed with water to obtain a solution with a specific concentration or viscosity. However, the mixing effect is not ideal through one-time mixing in a mixer.

[0093] To solve the technical problems of the existing dredging equipment in the background art, the inventive concept of the present application provides a separator for improving the mixing effect of a solution, comprising: a separator body having a liquid inlet end and a discharge end in the length direction, and a cavity formed inside the separator body; a first liquid inlet at the liquid inlet end for introducing an external solution; a first discharge port at the discharge end for discharging the mixed solution; and a spiral guide vane extending from the liquid inlet end to the discharge end for improving the travel of the solution inside the cavity.

[0094] The first liquid inlet and the first discharge port are eccentrically arranged.

[0095] According to the inventive concept, by eccentrically arranging the first liquid inlet and the first discharge port, the travel of the solution inside the separator can be improved, and the solution can be subjected to greater impact of the pipe wall inside the separator, thereby improving the mixing effect.

[0096] In order to better understand the above technical solutions, the above technical solutions will be described in detail below in combination with the drawings and specific embodiments.

[0097] Based on the inventive concept of the present application, in some preferred embodiments of the present application, a separator is provided for further mixing of dry powder and solvent mixed solution, suitable for the scene of preparing oilfield fracturing fluid. Among them, the oilfield fracturing fluid is usually a solution with a certain viscosity formed by mixing dry powder and pure water; in some embodiments, the dry powder can be polyacrylamide.

[0098] In some preferred embodiments, the oilfield fracturing fluid further comprises an additive selected from at least one of a crosslinking agent, a pH adjuster, and a surfactant.

[0099] Specifically, as shown in the figure, in some embodiments of the present application, a separator is provided, which can be a first separator 2122, comprising: Figures 1-2

[0100] A separator body has a liquid inlet end and a discharge end in the length direction, and a cavity is formed inside the separator body;

[0101] A first liquid inlet 21222 is located at the liquid inlet end for introducing external solution;

[0102] A first discharge port 21221 is located at the discharge end for discharging the mixed solution;

[0103] A spiral guide vane 21225 extends from the liquid inlet end to the discharge end for increasing the travel of the solution inside the cavity and forming a liquid passage 21226 in the middle of the separator;

[0104] Among them, the first liquid inlet 21222 and the first discharge port 21221 are arranged in a staggered manner with the liquid passage 21226.

[0105] By eccentrically arranging the first liquid inlet and the first discharge port, the travel of the solution inside the separator can be improved, and the solution can be subjected to greater impact from the pipe wall inside the separator, thereby improving the mixing and degassing effects. Further, by arranging the position of the liquid passage, the mixing effect of the liquid and the gas-liquid separation efficiency of the separator can be further improved.

[0106] In some preferred embodiments, the separator body has a pipe upper end and a pipe lower end in the height direction, and the first liquid inlet 21222 and the first discharge port 21221 are arranged close to the pipe lower end.

[0107] In some preferred embodiments, the separator further comprises a first gas discharge port 21223, which is located at the pipe upper end. Since the gas density is lighter, arranging the gas discharge port at the upper end can ensure better gas discharge effect.

[0108] ​In some preferred embodiments, the separator further comprises a first liquid inlet pipe 440, one end of which is connected to the first liquid inlet 21222, and the other end extends away from the separator; the separator further comprises a first liquid outlet pipe 450, one end of which is connected to the first liquid outlet 21221, and the other end extends away from the separator; and the separator further comprises a first gas outlet pipe 460, one end of which is connected to the first gas outlet, and the other end is arranged substantially parallel to the length direction of the separator. With the above technical solutions, on the one hand, the connection of various pipe openings is facilitated, and on the other hand, the advancing direction of the solution and the gas is guided.

[0109] In some preferred embodiments, the separator further comprises an ear, which is located close to the lower end of the pipe body, and the distance between the ear and the liquid inlet is smaller than the distance between the first gas outlet pipe and the liquid inlet, so as to ensure the stability of the center of gravity of the separator during operation.

[0110] In some preferred embodiments, the first gas outlet 21223 is located between two adjacent spiral vanes and is closer to the first liquid inlet than the first liquid outlet, and does not intersect with the extension of the trajectory or trajectory direction of the solution along the spiral flow guide vane. By staggering the position of the first gas outlet and the trajectory of the solution, it can be avoided that the solution splashes out of the first gas outlet when moving along the spiral flow guide vane, so as to ensure the mixing effect of the solution in the separator. Further, by arranging the gas outlet close to the liquid inlet, the disturbance of the exhaust gas to the discharged liquid can be reduced.

[0111] In some preferred embodiments, the inner diameter of the first liquid inlet is 50-80 mm, and / or the inner diameter of the first liquid outlet is 150-200 mm. With the above pipe opening inner diameters, the moving speed of the solution in the separator can be further optimized, and the solution mixing and exhaust effect can be improved. In some embodiments, the pitch of the spiral flow guide vane is 10-15 cm.

[0112] In some embodiments of the present application, a dry powder continuous mixing device is also provided, as shown in Figures 3-5 The device comprises:

[0113] a dry powder storage device 100 comprising a storage tank 110 for storing dry powder; and a fracturing fluid mixing device 200 for mixing the dry powder with water to form an oilfield fracturing fluid with required physical properties.

[0114] In the specific implementation process, the fracturing fluid mixing device 200 and the dry powder storage device 100 are arranged independently of each other, i.e., the positions of the two can be adjusted by the user according to actual needs.

[0115] In some preferred embodiments, referring to Figures 7-8The fracturing fluid mixing device 200 comprises a device chamber 210, which comprises a lifting shunt system 211 comprising a first liquid inlet pipeline 2111, a liquid inlet pump 2112 and a first liquid upward pipeline 2113 connected in sequence, the liquid inlet pump 2112 pumps the liquid in the first liquid inlet pipeline 2111 to the dry powder mixing system 212 at a higher position through the first liquid upward pipeline 2113, the dry powder mixing system 212 comprises a first powder inlet 21211, a first liquid inlet 21212 and a first discharge outlet 21221, the first liquid inlet 21212 is connected with the first liquid upward pipeline 2113; the first powder inlet 21211 is connected with the storage tank 110 through a dry powder conveying pipeline 900.

[0116] In the specific implementation, the dry powder mixing system 212 is farther away from the bottom of the device chamber 210 than the liquid inlet pump 2112, i.e., at a higher position, which is beneficial to fully utilize the space of the device chamber 210, reduce the floor area, and facilitate the pipeline layout of the device chamber or between the device chamber and the dry powder storage device.

[0117] In some preferred embodiments, continuing to refer to Figures 7-8 The dry powder mixing system 212 comprises a first mixing mechanism comprising a first mixer 2121 and a first separator 2122 as described in the above embodiments in sequence, the first mixer 2121 forms a negative pressure inside for mixing the dry powder and the liquid to form a first mixed solution; the first separator 2122 is used for degassing and further mixing the first mixed solution to form a second mixed solution, which is discharged from the device chamber 210 through the first discharge outlet 21221. In some embodiments, the second mixed solution is conveyed to the sand mixing truck through a mixed liquid conveying pipeline 910 for the final preparation and use of the fracturing fluid.

[0118] By dividing the mixing device into relatively independent storage devices and mixing devices, the above technical solution is beneficial to the assembly and deployment of the device. Further, by detachably arranging the mixer and the separator in the dry powder mixing system, the fracturing fluid mixing effect can be ensured, and the maintenance and transportation of the device are facilitated.

[0119] In some preferred embodiments of the present application, as Figures 16-17As shown, the first mixer 2121 is composed of a first pipe body 410, a second pipe body 420 and a third pipe body 430. The first pipe body 410 includes a bending portion 411 and an extension portion 412. The bending portion 411 includes a first opening 4111 and a second opening 4112 at two ends. The extension portion 412 is in communication with the bending portion 411 and extends away from the second opening 4112. The first opening 4111 forms a first liquid inlet 21212. The second pipe body 420 has a first pipe end 421 and a second pipe end 422 in the length direction. The first pipe end 421 extends into the cavity of the bending portion 411 via the extension portion 412 to form a first mixing position 4113. The liquid delivered by the first upper liquid pipe 2113 and the dry powder delivered by the dry powder delivery pipe 900 are fully mixed in the first mixing position 4113. The second pipe end 422 forms a first powder inlet 21211. The third pipe body 430 is in communication with the second opening 4112 and forms a first liquid outlet 21213 at one end. By extending the second pipe body into the cavity of the bending portion, the dry powder delivered by the second pipe body can be mixed with the solvent at a specific position in the cavity, thereby improving the mixing effect of the fracturing fluid.

[0120] In some preferred embodiments, the bending portion 411 is an arc-shaped structure having an inner surface at the inner side and an outer surface at the outer side of the arc-shaped structure. The extension portion 412 is formed on the outer surface. By introducing the extension portion into the cavity through the outer surface of the bending portion, the flow direction of the solvent entering the cavity from the first liquid inlet can be optimized, and the mixing effect of the dry powder and the solvent can be optimized.

[0121] In some preferred embodiments, the second pipe body 420 forms a first flow guide structure 423 at the first pipe end 421. The outer diameter of the first flow guide structure 423 gradually decreases away from the first pipe end. In some embodiments, the first flow guide structure is a conical surface with a taper angle of 10-15°. By forming the first flow guide structure at the first pipe end of the second pipe body, the solvent can flow at a more appropriate speed in the mixer, thereby achieving a more stable mixing effect with the dry powder.

[0122] In some preferred embodiments, with reference to Figure 17The third pipe body 430 has a first mixing promoting structure 431 at one end close to the first opening, and the inner diameter of the first mixing promoting structure 431 gradually decreases in the direction away from the first opening. In some embodiments, the first mixing promoting structure is a tapered surface, and the taper angle of the tapered surface is 10-15°. With the above technical solution, the solution mixed in the cavity can be more fully mixed in the third pipe body, achieving a better mixing effect.

[0123] In some preferred embodiments, the inner diameter of the first liquid inlet is 80-100 mm, and / or the inner diameter of the first powder inlet is 20-40 mm, and / or the inner diameter of the first liquid outlet is 30-80 mm. With the above inner diameters of the pipe openings, the powder feeding, liquid feeding and liquid outlet rates in the cavity can be further optimized, so that the dry powder solvent amount in the cavity per unit time can achieve dynamic balance, improving the mixing effect.

[0124] In the following embodiments of some aspects, the applicant will describe the dry powder storage device 100 described in the present application in detail.

[0125] In some preferred embodiments, referring to Figure 6 The dry powder storage device 100 further comprises a screw conveyor 120 and a buffer bin 130. The screw conveyor 120 transports the dry powder in the storage tank 110 to the buffer bin 130, and the dry powder enters the dry powder conveying pipeline 900 from the first powder outlet 131 of the buffer bin 130.

[0126] In the specific implementation process, the buffer bin 130 has an internal cavity with a certain volume to avoid the dry powder being rapidly extracted, causing discontinuous dry powder conveying. Further, the buffer bin 130 further has a first air inlet 132, which can be arranged opposite to the first powder outlet 131, to provide external atmospheric pressure for the dry powder conveying pipeline 900, preventing the formation of negative pressure in the dry powder conveying pipeline 900, and affecting the conveying of the dry powder.

[0127] In some preferred embodiments, continuing to refer to Figure 6 The storage tank 110 is approximately funnel-shaped, and a fluidized bed is arranged at the bottom of the storage tank 110 to transport the dry powder to the screw conveyor 120 and improve the conveying efficiency of the dry powder. In this embodiment, the screw conveyor 120 is arranged transversely and comprises a powder inlet in communication with the fluidized bed and a powder outlet in communication with the buffer bin 130, to reduce the influence of gravity during the dry powder conveying process and improve the stability of the dry powder conveying.

[0128] In some preferred embodiments, referring to Figures 3-4The dry powder continuous mixing device further comprises a fixed frame 300, a first fixed plate 310 is arranged on the top of the fixed frame 300, and the dry powder storage device 100 is connected to the first fixed plate 310 only through the top of the storage tank 110. Since the air pressure is large during the dry powder conveying, the pipeline may inevitably vibrate, and the above arrangement can ensure that the dry powder storage device 100 is stably fixed and has a certain deformable space at the lower part, reduces the metal fatigue of the bottom structure of the dry powder storage device 100 during the dry powder conveying, and improves the service life of the device.

[0129] In the embodiments of some aspects below, the applicant will describe the fracturing fluid mixing device 200 described in the present application in detail.

[0130] In some preferred embodiments, the fracturing fluid mixing device 200 further comprises an operation room 220 arranged adjacent to the equipment room 210. Referring to Figures 9-14 The operation room 220 comprises a first wall plate 221 and a second wall plate 222 arranged oppositely, the first wall plate 221 is provided with a lockable first door body 2211 for isolating the internal and external environments of the operation room 220; the equipment room 210 comprises a third wall plate 215 and a fourth wall plate 216 arranged oppositely, the fourth wall plate 216 is provided with a lockable second door body 2161 for isolating the internal and external environments of the equipment room 210, and the first wall plate 221 and the fourth wall plate 216 are located on opposite sides to avoid mutual interference of the workers of the equipment room and the operation room when entering and leaving.

[0131] In some preferred embodiments, referring to Figure 14 The third wall plate 215 is provided with a first support plate 2151, the first support plate 2151 is hinged to the third wall plate 215 and has a first position and a second position, when the first support plate 2151 is in the first position, it is in the vertical direction, when the first support plate 2151 is in the second position, it has a substantially perpendicular angle relationship with the third wall plate 215, for placing articles, so as to place working or maintenance equipment when the equipment is maintained or debugged at the oil well work site.

[0132] In some preferred embodiments, referring to Figures 9-14The operation room 220 is provided with a distribution box 225, an operation cabinet 226, a temperature adjusting device 227, and a flow meter 228. The operation room 220 is provided with a first partition plate 230 between the operation room 220 and the equipment room 210. The first partition plate 230 is provided with an observation window. The operation cabinet 226 is arranged close to the first partition plate 230 and includes a display operation panel arranged from top to bottom, an operation platform close to horizontal, and a cabinet body. The flow meter 228 is arranged on the first partition plate 230 and is slightly higher than the top end of the operation cabinet 226. With the above technical solution, the worker can more conveniently observe the internal condition of the equipment room when controlling the operation cabinet, which is beneficial to early warning and improves the safety of the equipment.

[0133] Further, the temperature adjusting device 227 can be an air conditioner arranged on the second wall plate 222 opposite to the first door body 2211, so that the temperature adjustment in the operation room is more moderate and the adverse effects on the health of the worker are avoided.

[0134] In some preferred embodiments, the first liquid inlet pipeline 2111 is connected with at least one upper water inlet 2114. The upper water inlet 2114 is provided with a butterfly valve for opening and closing the upper water inlet 2114. The first liquid inlet pipeline 2111 is connected with a first side of a liquid inlet pump 2112. A first liquid inlet pipeline 2113 is connected with a second side of the liquid inlet pump 2112. The first side and the second side are adjacent. The first liquid inlet pipeline 2113 includes first and second bending structures 21131 and 21132 located at two ends and having the same bending direction, and a straight pipeline body 21133 located between the first and second bending structures 21131 and 21132. With the above technical solution, the pipeline arrangement in the equipment room is more compact, and the utilization rate of the space in the equipment room is improved.

[0135] In some embodiments, the upper water inlet 2114 includes four upper water inlets 2114 arranged side by side and spaced apart and connected in communication with the first liquid inlet pipeline 2111 to ensure that the liquid inlet speed meets the liquid preparation demand.

[0136] In some embodiments, the first liquid outlet 21213 of the first mixer 2121 is connected in communication with the first liquid inlet 21222 of the first separator 2122. The first liquid inlet 21222 and the first liquid outlet 21221 are preferably connected by a pipe. The first separator 2122 is internally provided with a spiral flow guide vane for degassing and further mixing of the first mixed solution. In some preferred embodiments, the first liquid inlet 21222 and the first liquid outlet 21221 are eccentrically arranged to improve the degassing effect of the first mixed solution.

[0137] In some preferred embodiments, with reference to Figures 7-8The dry powder mixing system 212 comprises a second mixing mechanism spaced apart from the first mixing mechanism, and the second mixing mechanism comprises a second mixer 2123 and a second separator 2124 which are detachably arranged in sequence, and the working principle of the second mixing mechanism is similar to that of the first mixing mechanism. The second mixer 2123 comprises a second powder inlet 21231, a second liquid inlet 21232 and a second liquid outlet 21233, and the second separator 2124 comprises a second liquid inlet 21242, a second discharge port 21241 and a second exhaust pipe 21243, and the second liquid outlet 21233 is in communication with the second liquid inlet 21242.

[0138] In some preferred embodiments, the inner diameter of the first powder inlet 21211 is smaller than that of the second powder inlet 21231, and the inner diameter of the first liquid inlet 21212 is smaller than that of the second liquid inlet 21232; further, the second mixer 2123 has a second mixing position similar to the first mixing position 4113, and the cavity inner diameter at the first mixing position is smaller than that at the second mixing position.

[0139] By using the above technical solution, two groups of mixing mechanisms with different specifications are arranged to adapt to different scenes and different needs of fracturing fluid configuration, thereby improving the adaptability of the equipment. When the two groups of mixing mechanisms are used at the same time, the liquid preparation efficiency can be improved, and the time cost of liquid preparation can be effectively reduced.

[0140] In some preferred embodiments, the first liquid inlet pipe 2113 is spaced apart from an electric control valve and an electromagnetic flowmeter for controlling and monitoring the liquid inlet flow.

[0141] In some preferred embodiments, continuing to refer to Figures 7-8 The second bending structure 21132 is connected to a flow divider 2115, the flow divider 2115 divides the water into at least two paths, and the liquid is sent to the first liquid inlet 21212 and the second liquid inlet 21232 through the first lifting pipe 2116 and the second lifting pipe 2117 respectively, wherein the diameters of the first lifting pipe 2116 and the second lifting pipe 2117 are different. In some embodiments, the diameter of the first lifting pipe 2116 is DN100 (100mm), and the diameter of the second lifting pipe 2117 is DN80 (80mm); further, the first lifting pipe 2116 and the second lifting pipe 2117 are respectively provided with an electric control valve at a position close to the lower end of the pipe for controlling the working or stopping of the mixing mechanism.

[0142] In some preferred embodiments, referring to Figures 9-12The equipment room 210 further comprises a lifting mechanism 213 for adjusting the height of the mixing mechanism, the lifting mechanism 213 comprising a driving device, a mounting frame 2131, the driving device comprising a first lifting rod 2132 mounted on the third wall plate 215, and a first power device for driving the first lifting rod 2132. In some embodiments, the first lifting rod 2132 comprises a fixed rod 21321, and a telescopic rod 21322 capable of being movably connected with the fixed rod 21321, under the driving of the first power device, the telescopic rod 21322 is capable of moving in the length direction of the fixed rod 21321 and forms at least a first position and a second position.

[0143] Further, the first mixer 2121 and the second mixer 2123 are fixedly arranged at one end of the mounting frame 2131 close to the third wall plate 215, and the first separator 2122 and the second separator 2124 are fixedly arranged at one end of the mounting frame 2131 close to the fourth wall plate 216. Since the first mixer and the second mixer are to be connected with the dry powder conveying pipeline, and the dry powder conveying pipeline is arranged from bottom to top, by using the scheme in the present embodiment, the mixers are arranged close to the third wall plate and away from the second door body, which can reduce the interference of the dry powder conveying pipeline to the worker when entering the equipment room, and improve the safety of the operation of the equipment.

[0144] It can be understood that the first power device can control the telescopic rod in a manner commonly used in the art. In some embodiments, the fixed rod 21321 is sleeved outside the telescopic rod 21322, and the first power device comprises a rocker 21323 at the bottom end of the first lifting rod 2132, the control of the telescopic rod 21322 is realized by rotating the rocker 21323, and the control manner can be screw transmission or hydraulic transmission, etc. By using the above scheme, the rocker is arranged at the bottom of the first lifting rod, which can facilitate the operation of the worker.

[0145] In some preferred embodiments, continuing to refer to Figures 9-12The top end of the telescopic rod 21322 is fixedly connected with the mounting rack 2131, and the mounting rack 2131 is lifted or lowered by moving the telescopic rod 21322. In some embodiments, the mounting rack 2131 comprises a first horizontal rod 21311, the two ends of the first horizontal rod 21311 are respectively connected with a first vertical rod 21312 and a second vertical rod 21313, the telescopic rod 21322 is fixedly connected with a first mounting position of the first horizontal rod 21311, and the mounting rack 2131 further comprises a first inclined rod 21314 and a second inclined rod 21315, one end of the first inclined rod 21314 is fixed to one side of the first mounting position, and the other end is fixed to the first vertical rod 21312, one end of the second inclined rod 21315 is fixed to the other side of the first mounting position, and the other end is fixed to the second vertical rod 21313. The connection mode of the telescopic rod and the mounting rack in the above scheme can ensure the mechanical strength of the mounting rack during lifting and improve the safety of the equipment.

[0146] In some preferred embodiments, the driving device comprises a second lifting rod 2134 mounted on the fourth wall plate 216, and a second power device for driving the second lifting rod 2132. Similarly, the second lifting rod 2134 is similar to the first lifting rod 2132, comprising a fixed rod and a telescopic rod capable of being movably connected with the fixed rod, under the driving of the second power device, the telescopic rod can move relative to the fixed rod in the length direction of the fixed rod and form at least two positions, the top end of the telescopic rod is fixedly connected with the mounting rack, and the mounting rack is lifted or lowered by moving the telescopic rod. The first lifting rod 2132 and the second lifting rod 2132 are fixedly connected with the mounting rack at corresponding positions, and in some embodiments, the mounting rack 2131 comprises a second horizontal rod 21316 symmetrically arranged with the first horizontal rod 21311, the two ends of the second horizontal rod 21316 are respectively connected with two parallel vertical rods, the second lifting rod 2132 is fixedly connected with a second mounting position of the second horizontal rod 21316, and the mounting rack 2131 further comprises a third inclined rod and a fourth inclined rod, one end of each of the third inclined rod and the fourth inclined rod is connected with the two parallel vertical rods, and the other end of each of the third inclined rod and the fourth inclined rod is fixedly connected with the two sides of the second mounting position, so as to reinforce the second horizontal rod. Synchronously driving the first lifting rod 2132 and the second lifting rod 2134 can make the mounting rack more smoothly realize the lifting function.

[0147] In some preferred embodiments, with reference to Figure 4The top end of the mounting frame 2131 has an adjustable baffle, which comprises a first cover 501, a second cover 502 and a third cover 503 arranged in sequence. The first cover 501 and the third cover 503 are respectively hinged to the second cover 502, so that the first cover 501 and the third cover 503 can rotate away from the equipment room relative to the second cover 502. In some embodiments, the first cover 501 and the third cover 503 can rotate by 180°, so that the first cover 501 or the third cover 503 can be placed on the second cover 502 in a specific case. The first cover 501 corresponds to the positions of the first mixer 2121 and the second mixer 2123, and the third cover 503 corresponds to the positions of the first separator 2122 and the second separator 2124. With the above technical solution, on the one hand, the first mixing mechanism and the second mixing mechanism can be covered to prevent rain or dust from entering the equipment room during work, thereby ensuring the safety of the equipment during work. On the other hand, when the first cover 501 and the third cover 503 are opened, the mixing mechanism can be conveniently repaired or replaced, thereby improving work efficiency.

[0148] In some preferred embodiments, the top end of the mounting frame 2131 encloses a first cavity 2136, the first mixer 2121 and the second mixer 2123 are arranged in the first cavity 2136, and part of the second pipe body 420 and the third pipe body 430 are located outside the first cavity 2136, so as to be connected with the dry powder conveying pipeline and the separator. With the above technical solution, the operating environment of the mixer, which is a key structure of the equipment, can be further ensured to be stable, thereby improving the mixing effect of the fracturing fluid.

[0149] In some preferred embodiments, referring to Figure 15 The side of the mounting frame 2131 close to the second lifting rod 2132 has a horizontally arranged bearing shaft 2137. The first separator 2122 and the second separator 2124 are respectively provided with a first lug 21224 and a second lug 21244 on the outer wall. The first lug 21224 and the second lug 21244 are sleeved on the bearing shaft 2137 and can rotate around the bearing shaft 2137.

[0150] When the mixing mechanism is working, one end of the first separator 2122 is connected with the first mixer 2121, the first lug 21224 is in contact with the second crossbar 21316 at the first support position 2138 and is supported by the second crossbar 21316, so that the first separator 2122 can be kept stable under the action of the above two positions; similarly, one end of the second separator 2124 is connected with the second mixer 2123, the second lug 21244 is in contact with the second crossbar 21316, and is supported by the second crossbar 21316, so that the second separator 2124 can be kept stable under the action of the above two positions.

[0151] When the mixing mechanism is not working, the first separator 2122 is disconnected from the first mixer 2121, and the first separator 2122 can be rotated around the bearing shaft 2137 through the first lug 21224 to become a vertical state, which is convenient for its storage; similarly, the second separator 2124 is disconnected from the second mixer 2123, and the second separator 2124 can be rotated around the bearing shaft 2137 through the second lug 21244 to become a vertical state. In order to achieve a better separation state, the volume of the separator is usually large, which is difficult to directly store in the equipment room. By using the above technical scheme, when the mixing mechanism is not working, the connector between the separator and the mixer can be disassembled, such as the nut, and the separator can be rotated to make it convenient to be stored into the equipment room by the lifting mechanism, which is convenient for transportation or storage of the equipment.

[0152] In some preferred embodiments, referring to Figure 11 The equipment room 210 is also provided with at least one liquid adding pump 214 for adding materials to the second mixed solution outside the equipment room 210, such as a sand mixing truck. The liquid adding pump 214 is located near the fourth wall plate 216, and the fourth wall plate 216 is provided with a first baffle 810 at a position away from the lower part of the first wall plate 221, which is hinged with the fourth wall plate 216 and includes an open and closed state. When it is in the open state, the liquid adding pump 214 inside the equipment room 210 can access the external pipeline. In some embodiments, at least four liquid adding pumps 214 are provided in the equipment room 210, which are respectively a first liquid adding pump, a second liquid adding pump, a third liquid adding pump, and a fourth liquid adding pump, and are respectively provided with an inlet pipeline.

[0153] In some embodiments, the discharge pipelines of the first liquid additive pump and the second liquid additive pump are connected in parallel through an intermediate pipeline, the intermediate pipeline is provided with a gate; a flow meter such as a mass flow meter is arranged on the discharge pipeline of the first liquid additive pump, when the gate at the end of the discharge pipeline of the second liquid additive pump is closed and the gate of the intermediate pipeline is opened, the first liquid additive pump and the second liquid additive pump share the discharge pipeline of the first liquid additive pump so that they share the flow meter; when the gate at the end of the discharge pipeline of the second liquid additive pump is opened and the gate of the intermediate pipeline is closed, the second liquid additive pump is independently used. The discharge pipelines of the third liquid additive pump and the fourth liquid additive pump are independently arranged, and each independent flow meter is arranged on the discharge pipelines, and the flow meter can be an electromagnetic or turbine flow meter. By using the above technical scheme, the feeding rate of the liquid additive pump can be more flexibly controlled, and the preparation effect of the fracturing fluid can be ensured.

[0154] It can be understood that, in some embodiments, the liquid additive pump can be a cam rotor pump, and the displacement is 1-10 m 3 / h; further, the displacement of the first liquid additive pump and the second liquid additive pump is higher than that of the third liquid additive pump and the fourth liquid additive pump.

[0155] In some preferred embodiments, referring to Figure 10 , the upper part of the liquid additive pump 214 is provided with a first supporting frame 610, the upper part of the first supporting frame 610 carries an air compressor 710 and a dryer 720, the air compressor 710 is connected with the dryer 720, compressed gas enters a compressed air tank 730 located at the upper part of the dryer 720 after being dried by the dryer 720, the compressed air tank 730 is fixed to the top of the equipment room 210, the compressed gas enters the compressed air tank 730 and is discharged through an exhaust pipeline, an electric control valve is arranged on the exhaust pipeline, and the exhaust pipeline is connected with the fluidized bed. By using the above technical scheme, the air compression system required by the fluidized bed is integrated in the equipment room, the land occupation of the equipment is saved, and the overall integration level of the equipment is improved, which is convenient for the configuration and transportation of the equipment.

[0156] In summary, the mixer provided by the embodiments of the application can make the dry powder conveyed by the second pipe body mix with the solvent at a specific position in the cavity, thereby solving the technical problem of poor mixing effect of the fracturing fluid, realizing the automation of fracturing fluid mixing and the improvement of mixing effect, and having a good application prospect.

[0157] It should be noted that the technical features in the above embodiments can be freely combined by those skilled in the art, and the technical solutions formed by the combination also belong to the embodiments disclosed in the application.

[0158] Further, various modifications and changes can be made to the application without departing from the spirit thereof, and it is intended to cover in the appended claims all such modifications and changes that fall within the scope of the application.

Claims

1. A separator for improving mixing of a solution, characterized by: The separator comprises: a separator body having a liquid inlet end and a liquid outlet end in the length direction of the separator body, and a cavity formed inside the separator body; a first liquid inlet opening located at the liquid inlet end for introducing an external solution; a first liquid outlet opening located at the liquid outlet end for discharging the mixed solution; a spiral flow guide extending from the liquid inlet end to the liquid outlet end for increasing the travel of the solution inside the cavity and forming a liquid travel channel in the middle of the separator; wherein the first liquid inlet opening and the first liquid outlet opening are arranged in a staggered manner with the liquid travel channel.

2. The separator according to claim 1, wherein: the separator body has a tube upper end and a tube lower end in the height direction of the separator body, and the first liquid inlet opening and the first liquid outlet opening are arranged close to the tube lower end.

3. The separator according to claim 2, wherein: the separator further comprises a first gas outlet opening located at the tube upper end.

4. The separator according to claim 1, wherein: the separator further comprises a first liquid inlet pipe having one end connected to the first liquid inlet opening and the other end extending away from the separator.

5. The separator according to claim 1, wherein: the separator further comprises a first liquid outlet pipe having one end connected to the first liquid outlet opening and the other end extending away from the separator.

6. The separator according to claim 3, wherein: the separator further comprises a first gas outlet pipe having one end connected to the first gas outlet opening and the other end arranged in parallel with the length direction of the separator.

7. The separator according to claim 1, wherein: the separator further comprises a hanging ear located close to the tube lower end, and the distance between the hanging ear and the liquid inlet end is smaller than the distance between the first gas outlet pipe and the liquid inlet end.

8. The separator according to claim 3, wherein: the first gas outlet opening is located between two adjacent spiral pieces and closer to the first liquid inlet opening than the first liquid outlet opening, and does not intersect with the trajectory or the extension of the trajectory of the solution traveling along the spiral flow guide.

9. A continuous dry powder compounding apparatus, characterized by: The dry powder storage device comprises a storage tank for storing dry powder, The fracturing fluid mixing device comprises a device chamber, and the device chamber comprises a lifting shunt system, wherein the lifting shunt system comprises a first liquid inlet pipeline, a liquid inlet pump, and a first liquid outlet pipeline connected in sequence, and the liquid inlet pump pumps the liquid in the first liquid inlet pipeline to the dry powder mixing system located at a higher position through the first liquid outlet pipeline; The dry powder mixing system comprises a first mixing mechanism having a first powder inlet opening, a first liquid inlet opening, and a first liquid outlet opening; The first mixing mechanism comprises a first mixer, the first liquid inlet opening of the first mixer is connected to the first liquid outlet pipeline, the first powder inlet opening is connected to the storage tank through a dry powder conveying pipeline, and the first mixer forms a negative pressure inside to mix the dry powder and the liquid to form a first mixed solution; ​ The first mixing mechanism further comprises a first separator, which is the separator as claimed in any one of claims 1-8, and is detachably connected with the first mixer, the first separator being used for degassing and further mixing the first mixed solution to form a second mixed solution, and discharging the device chamber from the first discharge port.

10. The dry powder continuous mixing device according to claim 9, characterized in that: The fracturing fluid mixing device further comprises an operation chamber arranged adjacent to the device chamber; the operation chamber comprises oppositely arranged first and second wall plates, the first wall plate is provided with a lockable first door body for isolating the internal and external environments of the operation chamber; the device chamber comprises oppositely arranged third and fourth wall plates, the fourth wall plate is provided with a lockable second door body for isolating the internal and external environments of the device chamber, and the first and fourth wall plates are located on opposite sides.

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