Mixing equipment for preparing multi-hydrogen acid for acidification of oil and gas reservoir

Abstract

The invention discloses mixing equipment for preparing multi-hydrogen acid for acidification of an oil and gas reservoir, and relates to the field of multi-hydrogen acid preparation equipment.The mixing equipment comprises a reaction tank, a mixing part and a rotary flushing part, a mounting base is arranged at the top of the reaction tank, an interlayer cylinder is arranged on the reaction tank, a heating pipe is arranged in the interlayer cylinder, and a water inlet pipe is arranged in the interlayer cylinder; the interlayer cylinder is communicated with a water inlet pipe and a water outlet pipe respectively, a plurality of feeding pipes are arranged at the top of the reaction tank, a discharging pipe is arranged at the bottom of the reaction tank, and a first motor is fixedly mounted on the mounting seat; the stirrer and the scrapers rotate in opposite directions, so that the inner and outer layers of mixed liquid are uniformly mixed, heat exchange is facilitated, the temperatures of the inner and outer layers of the mixed liquid in the reaction tank are uniform, and spiral vortexes are formed among the mixed liquid at different depths in the rotating process of the stirrer; the mixed liquid of each group of stirrers exchanges with each other, so that the flowability among molecules in the mixed liquid is improved, and the polymerization reaction efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of polyhydrogen acid preparation equipment, and more specifically to a mixing equipment for preparing polyhydrogen acid for oil and gas reservoir acidification. Background Art

[0002] Polyacid for oil and gas reservoirs is a chemical treatment agent used to increase the production of oil and gas wells, especially playing an important role in acidizing and unblocking measures; polyacids usually contain three monomers: unsaturated fatty acids, unsaturated phosphonic acids and unsaturated sulfonic acids. These monomers form terpolymers through polymerization reactions, namely polyorganic polyacids. Polyacids are suitable for acidizing and unblocking sandstone or carbonate oil and gas reservoirs, and are also suitable for acidizing and unblocking oilfield water injection wells due to scaling or biological secretions. Polyacid for oil and gas reservoirs is an efficient and environmentally friendly acidizing agent. Through its unique chemical composition and preparation process, it can effectively improve the production and mining efficiency of oil and gas wells. Mixing equipment is required in its preparation process;

[0003] However, in the prior art, the reaction mixture in the reaction tank is not mixed evenly due to simple stirring by a stirring rod. Since the polymerization reaction requires certain temperature conditions, a heating device is often required to be installed on the side wall of the reaction tank. The uneven mixing of the inner and outer layers of the reaction mixture will lead to uneven temperatures of the inner and outer layers of the reaction mixture, and reaction mixtures of different depths are difficult to contact each other, resulting in less contact between molecules in the reaction mixture, affecting its reaction rate. At the same time, the flushing effect of the prior art is poor. To remove the residual reaction materials on the inner wall of the reaction tank, manual operation is required by the staff, which is troublesome and wastes a lot of water resources. Summary of the invention

[0004] In view of the problem in the prior art that uneven mixing of the inner and outer layers of the reaction mixture will lead to uneven temperatures of the inner and outer layers of the reaction mixture, and reaction mixtures at different depths are difficult to contact each other, resulting in less contact between molecules in the reaction mixture, affecting its reaction rate and poor flushing effect, the purpose of the present invention is to provide a mixing device for preparing polyhydrogen acid for oil and gas reservoir acidification.

[0005] To solve the above problems, the present invention adopts the following technical solutions.

[0006] A mixing device for preparing polyhydrogen acid for oil and gas reservoir acidification, comprising a reaction tank, a mixing part and a rotating flushing part, a mounting seat is provided on the top of the reaction tank, a sandwich cylinder is provided on the reaction tank, a heating pipe is provided in the sandwich cylinder, a water inlet pipe and a water outlet pipe are respectively connected to the sandwich cylinder, a plurality of feed pipes are provided on the top of the reaction tank, a discharge pipe is provided at the bottom of the reaction tank, and a first motor is fixedly installed on the mounting seat;

[0007] The mixing part is arranged in the reaction tank, and the mixing part is used to make the heating temperature of the inner and outer layers of the reaction mixture uniform and to increase the contact between the molecules in the reaction mixture, thereby improving the preparation efficiency of the polyhydrogen acid;

[0008] The rotary flushing part is arranged in the reaction tank, and is used to efficiently and conveniently remove the reaction materials remaining on the inner wall of the reaction tank.

[0009] Furthermore, a mounting cavity is provided in the mounting seat.

[0010] Further, the mixing unit comprises:

[0011] A rotating shaft, a first bevel gear, a group of inner sleeve shafts, a second bevel gear, a plurality of agitators, a plurality of mounting sleeves, a plurality of fixing bolts, a plurality of connecting rods, a group of scrapers, a mounting shaft, a third bevel gear, an outer sleeve and a layered adjustment component; the first bevel gear, the second bevel gear, the mounting shaft and the third bevel gear are all arranged in the mounting cavity, the third bevel gear is coaxially fixedly connected to the mounting shaft, the third bevel gear is rotatably connected to the inner wall of the mounting cavity through the mounting shaft, the first bevel gear and the second bevel gear are arranged on both sides of the third bevel gear, and the first bevel gear and the second bevel gear are both meshed with the third bevel gear for transmission;

[0012] The output end of the first motor is coaxially fixedly connected to the rotating shaft, the rotating shaft is coaxially fixedly connected to the first bevel gear, one of the inner sleeve shafts is coaxially fixedly connected to the second bevel gear, the agitator is fixedly mounted on the rotating shaft by a mounting sleeve and a fixing bolt, the inner sleeve shaft is coaxially sleeved on the rotating shaft, the outer sleeve shaft is coaxially sleeved on the outside of the inner sleeve shaft, and a return spring is coaxially provided between the outer sleeve shaft and the inner sleeve shaft, one end of a plurality of connecting rods is fixedly connected to the inner sleeve shaft, and the other end is fixedly connected to the scraper, the scraper shaft contacts the inner wall of the reaction tank, and a plurality of connecting rods are distributed on the rotating shaft in a circular array.

[0013] Furthermore, the layered adjustment component includes: a second motor and a cam, a mounting ring is coaxially provided on the outer side of the outer sleeve, a limit slot is provided on the mounting ring for limiting the cam from disengaging, the second motor is fixedly mounted on the outer side wall of the reaction tank, and the output end of the second motor is fixedly connected to the cam.

[0014] Furthermore, the rotary flushing unit comprises:

[0015] A liquid storage cylinder, a liquid inlet pipe, a collar, a group of connecting pipes, multiple groups of spray pipes, multiple first spray heads, a group of rotating cylinders, a liquid storage ball and multiple second spray heads, wherein the liquid storage cylinder is fixedly mounted on a mounting seat, the collar is sleeved on a rotating shaft, and a liquid storage tank is provided on the inner wall of the collar, a flow cavity is provided in the rotating shaft, an inner sleeve shaft coaxially fixedly connected to the second bevel gear is communicated with a group of connecting pipes, and liquid inlet holes are provided at positions of the rotating shaft corresponding to the liquid storage tank on the collar and corresponding to a group of connecting pipes;

[0016] The liquid storage cylinder is connected to the flow cavity of the rotating shaft through the liquid inlet pipe and the collar, a group of the rotating cylinders are respectively rotatably connected to a group of connecting pipes, and the nozzles are connected to the connecting pipes through the rotating cylinders, and the first spray heads are respectively arranged on the plurality of nozzles;

[0017] The liquid storage ball is fixedly connected to one end of the rotating shaft away from the first motor, and the liquid storage ball is communicated with the flow cavity of the rotating shaft, and a plurality of the second spray heads are all arranged on the liquid storage ball.

[0018] Furthermore, a group of the nozzles are arranged on the drum in a centrally symmetrical manner.

[0019] Furthermore, both ends of the stirrer are arranged obliquely with respect to the rotating shaft, and both ends of the stirrer are arranged perpendicularly to each other.

[0020] Furthermore, a control panel is provided on the reaction tank, a temperature sensor is provided in the interlayer cylinder, and the control panel is connected to the temperature sensor via an electrical signal.

[0021] Furthermore, a valve is provided on the discharge pipe.

[0022] Furthermore, a plurality of support frames are provided at the bottom of the reaction tank, a support pad is fixedly connected to the bottom of the support frame, a plurality of bolt mounting holes are opened on the support pad, and mounting bolts are provided in the bolt mounting holes.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] (1) In the present application, by respectively arranging the first bevel gear and the second bevel gear on both sides of the third bevel gear, the rotating shaft and the inner sleeve shaft rotate in opposite directions, thereby causing the agitator and the scraper to rotate in opposite directions, thereby facilitating uniform mixing of the inner and outer layers of the mixed liquid, facilitating heat exchange, and ensuring uniform temperatures of the inner and outer layers of the mixed liquid in the reaction tank.

[0025] (2) In the present application, both ends of the agitator are inclined to the rotating shaft and are perpendicular to each other, so that spiral vortices are formed between mixed liquids of different depths during rotation, and the mixed liquids between each group of agitators communicate with each other, thereby increasing the fluidity between the molecules in the mixed liquid and improving its polymerization reaction efficiency.

[0026] (3) The present application arranges a group of nozzles symmetrically on the side wall of the rotating drum, and the rotating drum is rotatably connected to the connecting pipe. When the cleaning liquid enters the group of nozzles symmetrically arranged through the rotating drum, the rotating drum drives the group of nozzles to rotate under the impact of water pressure, thereby achieving a rotational flushing effect on the inner wall of the reaction tank, which is convenient for better flushing of the reacted materials on the inner wall of the reaction tank, and at the same time cooperates with the scraper to scrape the reacted materials on the inner wall of the reaction tank off. The cleaning liquid enters the liquid storage ball at the bottom through the rotating shaft flow cavity, and finally is rotated outward and sprayed out through multiple second spray heads, which is convenient for cooperating with multiple groups of nozzles to clean the inner wall of the reaction tank and the internal structure of the reaction tank, saving equipment cleaning time and avoiding waste of reaction materials.

[0027] (4) The present application transmits the monitored water temperature in the interlayer cylinder to the control board in real time through the temperature sensor, and controls the heating tube in the interlayer cylinder through the control board to heat the water in the interlayer cylinder, thereby maintaining a constant reaction temperature and ensuring the stable temperature conditions required for the reaction. The output end of the second motor is controlled by the control board to drive the cam to rotate. As the cam rotates in the limit slot, the position of the agitator on the outer sleeve is adjusted in the reaction tank by switching the base end and the protruding end of the cam itself, thereby enhancing the exchange between reaction mixtures of different depths. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the overall structure of a mixing device for preparing polyhydrogen acid for oil and gas reservoir acidification provided in an embodiment of the present application;

[0029] Figure 2 A schematic diagram of the internal structure of a mixing device for preparing polyhydrogen acid for oil and gas reservoir acidification provided in an embodiment of the present application;

[0030] Figure 3 A schematic diagram of the installation structure of a mixing part and a rotating flushing part of a mixing device for preparing polyhydrogen acid for oil and gas reservoir acidification provided in an embodiment of the present application;

[0031] Figure 4 for Figure 3 A magnified schematic diagram of the middle part;

[0032] Figure 5 A schematic diagram of a mixing unit of a mixing device for preparing polyhydrogen acid for oil and gas reservoir acidification provided in an embodiment of the present application;

[0033] Figure 6 A schematic diagram of the structure of a rotating flushing frame of a mixing device for preparing polyhydrogen acid for oil and gas reservoir acidification provided in an embodiment of the present application;

[0034] Figure 7 A schematic diagram of the liquid storage ball structure of a mixing device prepared with polyhydrogen acid for oil and gas reservoir acidification provided in an embodiment of the present application.

[0035] Description of the numbers in the figure:

[0036] 1. Reaction tank; 11. Mounting seat; 12. Feed pipe; 13. Interlayer tube; 131. Heating tube; 132. Water inlet pipe; 133. Water outlet pipe; 14. Support frame; 141. Support pad; 142. Mounting bolt; 15. Discharge pipe; 151. Valve; 2. First motor; 21. Mounting cavity; 22. Rotating shaft; 221. First bevel gear; 23. Inner sleeve shaft; 231. Second bevel gear; 24. Agitator; 241, mounting sleeve; 242, fixing bolt; 25, connecting rod; 251, scraper; 26, mounting shaft; 261, third bevel gear; 27, outer sleeve; 28, second motor; 29, cam; 3, liquid storage cylinder; 31, liquid inlet pipe; 311, collar; 4, connecting pipe; 41, spray pipe; 411, first spray head; 412, rotating drum; 42, liquid storage ball; 421, second spray head. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0038] See also Figures 1 to 7 A mixing device for preparing polyhydrogen acid for oil and gas reservoir acidification, comprising a reaction tank 1, a mixing part and a rotating flushing part, a mounting seat 11 is provided on the top of the reaction tank 1, a sandwich tube 13 is provided on the reaction tank 1, a heating tube 131 is provided in the sandwich tube 13, a water inlet pipe 132 and a water outlet pipe 133 are respectively connected to the sandwich tube 13, a plurality of feed pipes 12 are provided on the top of the reaction tank 1, a discharge pipe 15 is provided at the bottom of the reaction tank 1, a first motor 2 is fixedly installed on the mounting seat 11, a plurality of support frames 14 are provided at the bottom of the reaction tank 1, a support pad 141 is fixedly connected to the bottom of the support frame 14, a plurality of bolt mounting holes are opened on the support pad 141, mounting bolts 142 are provided in the bolt mounting holes, a valve 151 is provided on the discharge pipe 15, a control board is provided on the reaction tank 1, a temperature sensor is provided in the sandwich tube 13, and the control board is connected to the temperature sensor by electrical signals;

[0039] By adopting the above technical solution, the reaction tank 1 is fixedly installed by installing bolts 142 and support pads 141, and distilled water is introduced into the reaction tank 1 through the feed pipe 12. The reaction materials are dissolved in the distilled water according to a certain proportion to prepare an aqueous solution with a specific percentage concentration. Then, ammonium persulfate and sodium bisulfite are added as initiators to initiate a polymerization reaction. Then, water is introduced into the interlayer cylinder 13 through the water inlet pipe 132, and the heating pipe 131 in the interlayer cylinder 13 is controlled by the control panel to heat the water in the interlayer cylinder 13 to maintain a constant reaction temperature.

[0040] like Figures 2 to 5 As shown, the mixing part is arranged in the reaction tank 1, and the mixing part is used to achieve uniform heating temperature of the inner and outer layers of the reaction mixture and increase the contact between the molecules in the reaction mixture, thereby improving the preparation efficiency of the polyhydrogen acid; the mixing part includes a rotating shaft 22, a first bevel gear 221, a group of inner sleeve shafts 23, a second bevel gear 231, a plurality of stirrers 24, a plurality of mounting sleeves 241, a plurality of fixing bolts 242, a plurality of connecting rods 25, a group of scrapers 251, a mounting shaft 26, a third bevel gear 261, an outer sleeve 27 and a layer adjustment group Parts; a mounting cavity 21 is provided in the mounting seat 11, a first bevel gear 221, a second bevel gear 231, a mounting shaft 26 and a third bevel gear 261 are all arranged in the mounting cavity 21, the third bevel gear 261 is coaxially fixedly connected to the mounting shaft 26, the third bevel gear 261 is rotatably connected to the inner wall of the mounting cavity 21 through the mounting shaft 26, the first bevel gear 221 and the second bevel gear 231 are arranged on both sides of the third bevel gear 261, and the first bevel gear 221 and the second bevel gear 231 are meshed with the third bevel gear 261 for transmission;

[0041] The layer adjustment assembly includes: a second motor 28 and a cam 29. A mounting ring is coaxially arranged on the outer side of the outer sleeve 27. A limit slot for limiting the cam 29 from disengaging is provided on the mounting ring. The second motor 28 is fixedly mounted on the outer side wall of the reaction tank 1. The output end of the second motor 28 is fixedly connected to the cam 29.

[0042] The output end of the first motor 2 is coaxially fixedly connected to the rotating shaft 22, the rotating shaft 22 is coaxially fixedly connected to the first bevel gear 221, one of the inner sleeve shafts 23 is coaxially fixedly connected to the second bevel gear 231, the agitator 24 is fixedly installed on the rotating shaft 22 through a mounting sleeve 241 and a fixing bolt 242, the inner sleeve shaft 23 is coaxially sleeved on the rotating shaft 22, one end of a plurality of connecting rods 25 is fixedly connected to the inner sleeve shaft 23, and the other end is fixedly connected to the scraper 251, the plurality of connecting rods 25 are distributed on the rotating shaft 22 in a circular array, the scraper 251 is in contact with the inner wall of the reaction tank 1, both ends of the agitator 24 are inclined to the rotating shaft 22, and the two ends of the agitator 24 are perpendicular to each other;

[0043] By adopting the above technical solution, since the first bevel gear 221 and the second bevel gear 231 are respectively located on both sides of the third bevel gear 261, and the first bevel gear 221 and the second bevel gear 231 are meshed with each other for transmission, the output end of the first motor 2 drives the rotating shaft 22 to rotate, so that the first bevel gear 221 coaxially fixedly connected to the rotating shaft 22 is meshed with the third bevel gear 261 for transmission, thereby causing the inner sleeve shaft 23 coaxially fixedly connected to the second bevel gear 231 to rotate. Since the first bevel gear 221 and the second bevel gear 231 are respectively located on both sides of the third bevel gear 261, the rotating shaft 22 and the inner sleeve shaft 23 rotate in opposite directions, thereby causing the agitator 24 and the scraper 251 to rotate in opposite directions, thereby facilitating the uniform mixing of the inner and outer layers of the mixed liquid, facilitating heat exchange, and ensuring uniform temperatures of the inner and outer layers of the mixed liquid in the reaction tank 1.

[0044] Both ends of the stirrer 24 are inclined to the rotating shaft 22, and the two ends of the stirrer 24 are perpendicular to each other. During the rotation process, spiral vortices are formed between the mixed liquids of different depths, and the mixed liquids between each group of stirrers 24 communicate with each other, so that the fluidity between the molecules in the mixed liquid is increased, thereby improving the polymerization reaction efficiency. After the reaction is completed, the organic polyacid and the fluorine-containing inorganic substance are compounded according to the mass percentage to obtain the polyhydrogen acid for acidification. After the mixing is completed and reaches the required standard, the finished acid solution is transported to the storage container through the discharge pipe 15 or directly supplied to the downstream process equipment;

[0045] The output end of the second motor 28 is controlled by the control panel to drive the cam 29 to rotate. As the cam 29 rotates in the limit slot, the position of the agitator 24 on the outer sleeve 27 in the reaction tank 1 is adjusted by switching the base end and the protruding end of the cam 29 itself, so as to enhance the exchange between reaction mixtures of different depths.

[0046] like Figures 3 to 7 As shown, the rotary flushing part is arranged in the reaction tank 1, and the rotary flushing part is used to efficiently and conveniently remove the reaction materials remaining on the inner wall of the reaction tank 1; the rotary flushing part comprises a liquid storage cylinder 3, a liquid inlet pipe 31, a collar 311, a group of connecting pipes 4, multiple groups of nozzles 41, multiple first spray heads 411, a group of rotating cylinders 412, a liquid storage ball 42 and multiple second spray heads 421, the liquid storage cylinder 3 is fixedly mounted on the mounting seat 11, the collar 311 is sleeved on the rotating shaft 22, and a liquid storage tank is provided on the inner wall of the collar 311, a flow cavity is provided in the rotating shaft 22, and the inner sleeve shaft 23 coaxially fixedly connected with the second bevel gear 231 is communicated with a group of connecting pipes 4, and the rotating shaft 22 is provided with liquid inlet holes at positions corresponding to the liquid storage tank on the collar 311 and at positions corresponding to a group of connecting pipes 4;

[0047] The liquid storage cylinder 3 is connected to the flow cavity of the rotating shaft 22 through the liquid inlet pipe 31 and the collar 311. A group of rotating cylinders 412 are respectively connected to a group of connecting pipes 4, and the nozzles 41 are connected to the connecting pipes 4 through the rotating cylinders 412. A plurality of first spray heads 411 are respectively arranged on a plurality of groups of nozzles 41, wherein a group of nozzles 41 is arranged on the rotating cylinder 412 in a centrally symmetrical manner.

[0048] The liquid storage ball 42 is fixedly connected to one end of the rotating shaft 22 away from the first motor 2, and the liquid storage ball 42 is connected to the flow cavity of the rotating shaft 22, and a plurality of second spray heads 421 are arranged on the liquid storage ball 42;

[0049] By adopting the above technical solution, the cleaning liquid is transported to the liquid storage cylinder 3 through the external liquid pump, and the cleaning liquid entering the liquid storage cylinder 3 flows into the liquid storage tank in the sleeve ring 311 through the liquid inlet pipe 31. A flow cavity is provided in the rotating shaft 22, and a liquid inlet hole is opened on the side wall of the rotating shaft 22 corresponding to the liquid storage tank. The cleaning liquid enters the connecting pipe 4 and the liquid storage ball 42 respectively through the liquid inlet hole and the liquid storage tank. The connecting pipe 4 and the liquid storage ball 42 rotate with the inner sleeve shaft 23 and the rotating shaft 22 respectively, and the cleaning liquid entering the connecting pipe 4 enters through the rotating cylinder 412 The cleaning liquid is finally sprayed outward from the nozzle 41 through the multiple first spray heads 411 on the nozzle 41. Since a group of nozzles 41 are centrally symmetrically arranged on the side wall of the rotating drum 412, and the rotating drum 412 is rotatably connected to the connecting pipe 4, when the cleaning liquid enters the group of nozzles 41 centrally symmetrically arranged through the rotating drum 412, the rotating drum 412 drives the group of nozzles 41 to rotate under the impact of water pressure, thereby achieving a rotating flushing effect on the inner wall of the reaction tank 1, so as to better flush the reacted materials on the inner wall of the reaction tank 1.

[0050] At the same time, the scraper 251 is used to scrape off the reacted material on the inner wall of the reaction tank 1, and the cleaning liquid enters the liquid storage ball 42 at the bottom through the circulation cavity of the rotating shaft 22, and is finally sprayed outward through multiple second spray heads 421, so as to cooperate with multiple groups of nozzles 41 to clean the inner wall of the reaction tank 1 and the internal structure of the reaction tank 1, saving equipment cleaning time and avoiding waste of reaction materials.

[0051] From the above, we can see that the working principle of this application is as follows:

[0052] First, distilled water is introduced into the reaction tank 1 through the feed pipe 12, and the reaction materials are dissolved in the distilled water according to a certain ratio to prepare an aqueous solution with a specific percentage concentration. Then, ammonium persulfate and sodium bisulfite are added as initiators to initiate a polymerization reaction. Then, water is introduced into the interlayer cylinder 13 through the water inlet pipe 132, and the heating pipe 131 in the interlayer cylinder 13 is controlled by the control panel to heat the water in the interlayer cylinder 13 to maintain a constant reaction temperature.

[0053] Since the first bevel gear 221 and the second bevel gear 231 are respectively located on both sides of the third bevel gear 261, and the first bevel gear 221 and the second bevel gear 231 are meshed with each other for transmission, the output end of the first motor 2 drives the rotating shaft 22 to rotate, so that the first bevel gear 221 coaxially fixedly connected to the rotating shaft 22 is meshed with the third bevel gear 261 for transmission, thereby causing the inner sleeve shaft 23 coaxially fixedly connected to the second bevel gear 231 to rotate. Since the first bevel gear 221 and the second bevel gear 231 are respectively located on both sides of the third bevel gear 261, the rotating shaft 22 and the inner sleeve shaft 23 rotate in opposite directions, thereby causing the agitator 24 and the scraper 251 to rotate in opposite directions.

[0054] Both ends of the stirrer 24 are inclined to the rotating shaft 22, and the two ends of the stirrer 24 are perpendicular to each other. During the rotation process, spiral vortices are formed between the mixed liquids of different depths, and the mixed liquids between each group of stirrers 24 communicate with each other, so that the fluidity between the molecules in the mixed liquid is increased, thereby improving the polymerization reaction efficiency. After the reaction is completed, the organic polyacid and the fluorine-containing inorganic substance are compounded according to the mass percentage to obtain the polyhydrogen acid for acidification. After the mixing is completed and reaches the required standard, the finished acid solution is transported to the storage container through the discharge pipe 15 or directly supplied to the downstream process equipment;

[0055] Finally, the cleaning liquid is transported to the liquid storage cylinder 3 through an external liquid pump, and the cleaning liquid entering the liquid storage cylinder 3 flows into the liquid storage tank in the sleeve ring 311 through the liquid inlet pipe 31. A flow cavity is provided in the rotating shaft 22, and a liquid inlet hole is opened on the side wall of the rotating shaft 22 corresponding to the liquid storage tank. The cleaning liquid enters the connecting pipe 4 and the liquid storage ball 42 respectively through the liquid inlet hole and the liquid storage tank. The connecting pipe 4 and the liquid storage ball 42 rotate with the inner sleeve shaft 23 and the rotating shaft 22 respectively. The cleaning liquid entering the connecting pipe 4 then enters the nozzle 41 through the rotating cylinder 412, and finally sprays the cleaning liquid outward through the multiple first spray heads 411 on the nozzle 41. A group of nozzles 41 are centrally symmetrically arranged on the side wall of the rotating drum 412, and the rotating drum 412 is rotatably connected to the connecting pipe 4. When the cleaning liquid enters the group of nozzles 41 centrally symmetrically arranged through the rotating drum 412, under the impact of water pressure, the rotating drum 412 drives the group of nozzles 41 to rotate, and at the same time cooperates with the scraper 251 to scrape off the reacted material on the inner wall of the reaction tank 1. The cleaning liquid enters the liquid storage ball 42 at the bottom through the circulation cavity of the rotating shaft 22, and finally rotates outward through multiple second spray heads 421 to spray out, so as to cooperate with multiple groups of nozzles 41 to clean the inner wall of the reaction tank 1 and the internal structure of the reaction tank 1.

[0056] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A mixing device for preparing polyhydrogen acid for oil and gas reservoir acidification, characterized in that: include: A reaction tank (1), a mixing section and a rotating flushing section, wherein a mounting seat (11) is provided on the top of the reaction tank (1), an interlayer cylinder (13) is provided on the reaction tank (1), a heating tube (131) is provided in the interlayer cylinder (13), a water inlet pipe (132) and a water outlet pipe (133) are respectively connected to the interlayer cylinder (13), a plurality of feed pipes (12) are provided on the top of the reaction tank (1), a discharge pipe (15) is provided at the bottom of the reaction tank (1), and a first motor (2) is fixedly mounted on the mounting seat (11); The mixing section is arranged in the reaction tank (1), and is used to make the heating temperature of the inner and outer layers of the reaction mixture uniform and to increase the contact between molecules in the reaction mixture at different depths, thereby improving the preparation efficiency of the polyhydrogen acid; The rotary flushing section is arranged in the reaction tank (1), and is used to efficiently and conveniently remove the reaction material remaining on the inner wall of the reaction tank (1).

2. The mixing device for preparing polyhydrogen acid for oil and gas reservoir acidification according to claim 1, characterized in that: A mounting cavity (21) is provided in the mounting seat (11).

3. A mixing device for preparing polyhydrogen acid for oil and gas reservoir acidification according to claim 2, characterized in that: The mixing unit comprises: A rotating shaft (22), a first bevel gear (221), a group of inner sleeve shafts (23), a second bevel gear (231), a plurality of stirrers (24), a plurality of mounting sleeves (241), a plurality of fixing bolts (242), a plurality of connecting rods (25), a group of scrapers (251), a mounting shaft (26), a third bevel gear (261), an outer sleeve (27) and a layer adjustment component; the first bevel gear (221), the second bevel gear (231), the mounting shaft (26) and the third bevel gear (261) are all arranged in the mounting cavity (21); the third bevel gear (261) is coaxially fixedly connected to the mounting shaft (26); the third bevel gear (261) is rotatably connected to the inner wall of the mounting cavity (21) via the mounting shaft (26); the first bevel gear (221) and the second bevel gear (231) are arranged on both sides of the third bevel gear (261); and the first bevel gear (221) and the second bevel gear (231) are both meshed with the third bevel gear (261) for transmission; The output end of the first motor (2) is coaxially fixedly connected to the rotating shaft (22), the rotating shaft (22) is coaxially fixedly connected to the first bevel gear (221), one of the inner sleeve shafts (23) is coaxially fixedly connected to the second bevel gear (231), the agitator (24) is fixedly mounted on the rotating shaft (22) via a mounting sleeve (241) and a fixing bolt (242), the inner sleeve shaft (23) is coaxially sleeved on the rotating shaft (22), the outer sleeve shaft (27) is coaxially sleeved on the outer side of the inner sleeve shaft (23), and a return spring is coaxially provided between the outer sleeve shaft (27) and the inner sleeve shaft (23), one end of the plurality of connecting rods (25) is fixedly connected to the outer sleeve shaft (27), and the other end is fixedly connected to a scraper (251), the scraper (251) is in contact with the inner wall of the reaction tank (1), and the plurality of connecting rods (25) are distributed on the rotating shaft (22) in a circular array.

4. A mixing device for preparing polyhydrogen acid for oil and gas reservoir acidification according to claim 3, characterized in that: The layer adjustment component comprises: a second motor (28) and a cam (29); a mounting ring is coaxially provided on the outer side of the outer sleeve (27); a limit slot for limiting the cam (29) from disengaging is provided on the mounting ring; the second motor (28) is fixedly mounted on the outer side wall of the reaction tank (1); and an output end of the second motor (28) is fixedly connected to the cam (29).

5. A mixing device for preparing polyhydrogen acid for oil and gas reservoir acidification according to claim 3, characterized in that: The rotary flushing unit comprises: A liquid storage cylinder (3), a liquid inlet pipe (31), a collar (311), a group of connecting pipes (4), a plurality of nozzles (41), a plurality of first spray heads (411), a group of rotating cylinders (412), a liquid storage ball (42) and a plurality of second spray heads (421), wherein the liquid storage cylinder (3) is fixedly mounted on a mounting seat (11), the collar (311) is sleeved on a rotating shaft (22), and a liquid storage tank is provided on the inner wall of the collar (311), a circulation cavity is provided in the rotating shaft (22), an inner sleeve shaft (23) coaxially fixedly connected to the second bevel gear (231) is communicated with a group of connecting pipes (4), and liquid inlet holes are provided at positions of the rotating shaft (22) corresponding to the liquid storage tank on the collar (311) and corresponding to the group of connecting pipes (4); The liquid storage cylinder (3) is connected to the flow cavity of the rotating shaft (22) through the liquid inlet pipe (31) and the collar (311); a group of the rotating cylinders (412) are respectively rotatably connected to a group of connecting pipes (4); and the spray pipe (41) is connected to the connecting pipe (4) through the rotating cylinder (412); and a plurality of the first spray heads (411) are respectively arranged on the plurality of groups of spray pipes (41); The liquid storage ball (42) is fixedly connected to one end of the rotating shaft (22) away from the first motor (2), and the liquid storage ball (42) is communicated with the flow cavity of the rotating shaft (22), and a plurality of the second spray heads (421) are all arranged on the liquid storage ball (42).

6. A mixing device for preparing polyhydrogen acid for oil and gas reservoir acidification according to claim 5, characterized in that: A group of the nozzles (41) are arranged on the rotating drum (412) in a centrally symmetrical manner.

7. A mixing device for preparing polyhydrogen acid for oil and gas reservoir acidification according to claim 5, characterized in that: Both ends of the stirrer (24) are arranged obliquely with respect to the rotating shaft (22), and the two ends of the stirrer (24) are arranged perpendicularly to each other.

8. A mixing device for preparing polyhydrogen acid for oil and gas reservoir acidification according to claim 1, characterized in that: The reaction tank (1) is provided with a control panel, the interlayer cylinder (13) is provided with a temperature sensor, and the control panel is connected to the temperature sensor via an electrical signal.

9. A mixing device for preparing polyhydrogen acid for oil and gas reservoir acidification according to claim 1, characterized in that: The discharge pipe (15) is provided with a valve (151).

10. A mixing device for preparing polyhydrogen acid for oil and gas reservoir acidification according to claim 1, characterized in that: A plurality of support frames (14) are provided at the bottom of the reaction tank (1), a support pad (141) is fixedly connected to the bottom of the support frame (14), a plurality of bolt mounting holes are provided on the support pad (141), and mounting bolts (142) are provided in the bolt mounting holes.

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