A nitrogen foam acidizing foaming agent mixing reaction equipment and working method

Abstract

This invention discloses a nitrogen-filled foam acidification foaming agent mixing reaction device and its working method, comprising: a device base and a mixing reaction vessel, the mixing reaction vessel being installed on the upper wall of the device base, a rotating and rolling dispersion mixing structure being provided on the mixing reaction vessel, a static dispersion feeding structure being provided at the top of the mixing reaction vessel, a pressurized nitrogen filling structure being installed on the right side of the mixing reaction vessel, and a residual gas purification and discharge structure being installed behind the pressurized nitrogen filling structure; this invention relates to the field of foaming agent production equipment technology, and the beneficial effects of this invention are: solving the problems of existing mixing reaction equipment using simple mechanical stirring or static mixing methods, resulting in poor material dispersion, affecting the performance of the foaming agent, poor dispersion affecting the internal reaction rate, insufficient material contact during nitrogen filling, and direct emission of residual nitrogen and volatile substances during the reaction, which easily causes environmental pollution due to the presence of acidic substances in the reacting gases.

Description

Technical Field

[0001] This invention relates to the field of foaming agent production equipment technology, specifically to a nitrogen-filled foam acidification foaming agent mixing and reaction equipment and its working method. Background Technology

[0002] Nitrogen-filled foam acidification technology is a production enhancement measure that combines the characteristics of foam fluids and acidification. It is widely used in complex formation conditions such as medium-to-high water-cut oil wells and high-temperature, high-salinity oil reservoirs. In fields such as oil extraction, chemical production, and material preparation, the mixing reaction process of foam acidification blowing agents has a significant impact on product performance. Existing mixing reaction equipment usually adopts simple mechanical stirring or static mixing methods. Conventional stirring structures have poor dispersion effects on high-viscosity or solid-phase materials, which can easily lead to incomplete reactions, affecting the performance of the blowing agent. In addition, the poor dispersion effect of the blowing agent affects the internal reaction rate and production efficiency, while the mixing reaction is uneven. During nitrogen filling, the nitrogen gas does not have sufficient contact with the materials, making it difficult to form a stable and uniform foam system. Furthermore, residual nitrogen gas and volatile substances are directly emitted during the reaction. Since the participating gas contains acidic substances, direct emission can easily cause environmental pollution. Therefore, there is an urgent need for an intelligent reaction equipment that can achieve efficient dispersion and mixing, controllable nitrogen filling, and exhaust gas purification to meet the high-quality production requirements of foam acidification blowing agents. Summary of the Invention

[0003] To achieve the above objectives, the present invention is implemented through the following technical solution: a nitrogen-filled foam acidification foaming agent mixing reaction device, comprising: a device base and a mixing reaction vessel, the mixing reaction vessel being installed on the upper wall of the device base, a rotary rolling dispersion mixing structure being provided on the mixing reaction vessel, a static dispersion feeding structure being provided at the top of the mixing reaction vessel, a pressurized nitrogen filling structure being installed on the right side of the mixing reaction vessel, and a residual gas purification and discharge structure being installed behind the pressurized nitrogen filling structure;

[0004] The rotary rolling dispersion and mixing structure includes: a mixing reaction chamber, a drive reducer, a drive motor, a rotating shaft, a first rotating frame, three telescopic dispersion and mixing components, several rolling drums, a second rotating frame, several stirring rods, and a discharge pipe;

[0005] The mixing reaction chamber is located inside the mixing reactor. The drive reducer is installed at the top of the mixing reactor. The drive motor is installed on the drive reducer and connected to its drive end. The output end of the drive reducer extends into the mixing reaction chamber. The rotating shaft is installed on the output end of the drive reducer. The first rotating frame is fitted on the outer wall of the rotating shaft. Three telescopic dispersion and mixing components are installed on the outer wall of the first rotating frame. Several rolling cylinders are installed on the inner wall of the mixing reaction chamber. The second rotating frame is installed at the lower end of the rotating shaft. Several stirring rods are installed on the outer wall of the second rotating frame. The discharge pipe is embedded at the lower end of the front wall of the mixing reactor.

[0006] Preferably, a switch valve is installed on the discharge pipe.

[0007] Preferably, each of the three telescopic dispersion and mixing components includes: a fixed plate, a telescopic plate, a combined cavity, several spring telescopic rods, a dispersion and mixing net, three mounting slots, and three rotating rollers;

[0008] The fixed plate is installed on the outer wall of the first rotating frame. The combined cavity is opened inside one end of the telescopic plate. The telescopic plate is movably installed on the fixed plate through the combined cavity. One end of several spring telescopic rods is installed on the inner wall of the combined cavity and the other end is connected to the fixed plate. The dispersing and mixing net is embedded in the telescopic plate. Three mounting slots are opened on the other end of the telescopic plate. Three rotating rollers are installed on the three mounting slots.

[0009] Preferably, the front end of the mixing reactor is provided with a mounting bracket, and a pair of sampling valves are provided at the upper and lower positions of the front wall of the mounting bracket.

[0010] Preferably, the static dispersion feeding structure includes: a feeding rack, a pair of feeding pipes, a device cavity, a pair of fixing rings, and several dispersion plates;

[0011] The feed rack is installed at the top of the mixing reaction chamber. A pair of feed pipes are embedded in the upper wall of the mixing reaction vessel and the lower end is embedded in the feed rack. The equipment cavity is opened inside the feed rack. A pair of fixing rings are installed inside the equipment cavity. Several dispersing plates are installed obliquely and crosswise inside the pair of fixing rings.

[0012] Preferably, the pressurized nitrogen filling structure includes: a mounting base, a nitrogen storage tank, a pressurized delivery pump, a pressurized injection pipe, a pressure monitoring gauge, and a circulating gas pipe;

[0013] The mounting base is installed on the right side of the mixing reactor. The nitrogen storage tank is installed on the mounting base. The booster pump is installed behind the mounting base. The inlet of the booster pump is connected to the outlet of the nitrogen storage tank. The booster injection pipe is installed vertically on the injection port at the top of the booster pump. The pressure monitoring gauge is installed on the booster injection pipe. The circulating gas pipe is embedded in the inlet port on the side wall of the mixing reactor. The other end of the circulating gas pipe is connected to the booster injection pipe.

[0014] Preferably, the booster pump is mounted on the equipment base using fixing bolts.

[0015] Preferably, the residual gas purification and emission structure includes: an exhaust pipe, a purification box, a filter box, a filter chamber, an adsorption filter packing, a sealing plate, a purification chamber, a circulation pump, a pair of circulation delivery pipes, a pair of atomizing spray racks, several purification nozzles, an exhaust screen, and a pair of maintenance valves.

[0016] One end of the exhaust pipe is located at the top of the booster injection pipe. The purification box is installed behind the booster delivery pump. The filter box is installed on the upper wall of the purification box. The other end of the exhaust pipe is embedded in the filter box. The filter chamber is located inside the filter box. The adsorption filter packing is located inside the filter chamber. The sealing plate is installed at the opening on the side wall of the filter box. The purification chamber is located inside the purification box and is connected to the filter chamber. The circulation pump is installed on the lower wall of the purification box and connected to the purification chamber. One end of a pair of circulation delivery pipes is installed on the circulation pump. The other end of the pair of circulation pumps is wrapped around the top of the purification box and embedded on the upper wall of the purification box. A pair of atomizing spray frames are installed on the top wall inside the purification chamber. The pair of circulation delivery pipes are connected to the pair of atomizing spray frames. Several purification nozzles are installed on the pair of atomizing spray frames. The exhaust screen is embedded on the right side wall of the purification box. A pair of maintenance valves are embedded below the exhaust screen.

[0017] Preferably, the purification box is mounted on the equipment base via support legs.

[0018] A working method includes the following steps:

[0019] S1. Connect the feed pipe to the external feeding equipment. Before production, some material is injected into the feed rack through the feed pipe. The dispersion plate inside the feed rack is inclined and crosses to form irregular holes. The material is initially dispersed when it falls to avoid accumulation.

[0020] S2. The rotating shaft drives the fixed plate and the telescopic plate to rotate, dispersing and mixing the material through the mixing net. The rotating rollers on the outside of the telescopic plate are supported by the spring telescopic rod and roll on the wall of the mixing chamber as they rotate, driving the telescopic plate to move back and forth, thus enhancing the turbulent mixing effect.

[0021] S3. While mixing and stirring, inject acid solution in batches through the feed pipe to ensure uniform acidification;

[0022] S4. When mixing and reacting, start the booster pump to extract nitrogen from the storage tank and inject it into the reaction chamber through the booster injection pipe. Nitrogen combines with the foaming agent and foam stabilizer to form stable foam, which improves the permeability of the reservoir. The pressure monitoring instrument monitors the pressure of the reactor in real time to ensure the nitrogen filling effect.

[0023] S5. After the reaction is complete, switch the electric valve to transport the acidic residual gas through the pipeline to the filter box. The gas is initially purified by the filter adsorption packing and then enters the purification chamber. The purification liquid is atomized and sprayed by the circulation pump to decompose the acidic substances in the residual gas. Finally, it is discharged through the exhaust network.

[0024] Beneficial effects

[0025] This invention provides a nitrogen-filled foam acidifying foaming agent mixing reaction device and its working method, which has the following beneficial effects: This solution improves upon traditional nitrogen-filled foam acidifying foaming agent mixing reaction devices by achieving multi-dimensional dynamic stirring through a rotary rolling dispersion mixing structure (drive motor, telescopic dispersion mixing component, rolling drum, etc.). Combined with the shearing action of the dispersion mixing net and the rolling drum, it significantly improves the uniformity of material dispersion. The spring telescopic rod design of the telescopic dispersion mixing component can adapt to the material viscosity and increase the stirring flow intensity, avoiding local accumulation and ensuring sufficient reaction. Static dispersion feeding has been optimized; the feed pipe, in conjunction with the inclined and intersecting dispersion plates, allows the raw materials to enter the reaction chamber after pre-dispersion, reducing the mixing load and improving efficiency. The pressurized nitrogen-filling structure (nitrogen storage tank, pressurized delivery pump, circulating gas pipe) adjusts the nitrogen injection volume in real time through a pressure monitoring gauge to ensure foam stability, and the circulating adsorption purification structure further enhances the foam's performance. This system performs multi-stage treatment of residual gas, adsorbing harmful substances and purifying them through spraying, meeting environmental protection requirements. The maintenance valve design facilitates filter replacement and equipment cleaning. It integrates dynamic mixing, intelligent nitrogen charging, and exhaust gas purification functions, significantly improving the quality and production efficiency of foaming agents while reducing energy consumption and environmental pollution. Suitable for large-scale industrial applications, it solves the problems of existing mixing reaction equipment that typically uses simple mechanical stirring or static mixing methods. Conventional stirring structures have poor dispersion effects on high-viscosity or solid-phase materials, easily leading to incomplete reactions, affecting foaming agent performance, and resulting in uneven mixing. Furthermore, during nitrogen charging, insufficient contact between nitrogen and materials makes it difficult to form a stable and uniform foam system. Additionally, residual nitrogen and volatile substances are directly emitted during the reaction, causing environmental pollution due to the presence of acidic substances in the reacting gases. Attached Figure Description

[0026] Figure 1 This is a front-view three-dimensional structural diagram of a nitrogen-filled foam acidification foaming agent mixing and reaction device according to the present invention.

[0027] Figure 2 This is a rear-view three-dimensional structural diagram of a nitrogen-filled foam acidification foaming agent mixing and reaction device according to the present invention.

[0028] Figure 3 This is a schematic diagram of the main structure of a nitrogen-filled foam acidification foaming agent mixing and reaction device according to the present invention.

[0029] Figure 4 This is a three-dimensional cross-sectional view of the mixing reactor of the nitrogen-filled foam acidification foaming agent mixing reaction equipment according to the present invention.

[0030] Figure 5 This is a schematic diagram of the main cross-sectional view of the mixing reactor of the nitrogen-filled foam acidification foaming agent mixing reaction equipment according to the present invention.

[0031] Figure 6 This is a three-dimensional cross-sectional view of the static dispersion feeding structure of the nitrogen-filled foam acidification foaming agent mixing and reaction equipment of the present invention.

[0032] Figure 7 This is a top cross-sectional view of the mixing reactor of the nitrogen-filled foam acidification foaming agent mixing reaction equipment according to the present invention.

[0033] Figure 8 This is a partial cross-sectional view of the telescopic dispersion mixing component of a nitrogen-filled foam acidification foaming agent mixing reaction device according to the present invention.

[0034] Figure 9 This is a side cross-sectional view of the purification chamber of a nitrogen-filled foam acidification foaming agent mixing reaction device according to the present invention.

[0035] In the diagram: 1-Equipment base; 2-Mixing reactor; 3-Mixing reaction chamber; 4-Drive reducer; 5-Drive motor; 6-Rotating shaft; 7-First rotating frame; 8-Rolling drum; 9-Second rotating frame; 10-Stirring rod; 11-Discharge pipe; 12-Switch valve; 13-Fixed plate; 14-Telescopic plate; 15-Combined chamber; 16-Spring telescopic rod; 17-Dispersion mixing net; 18-Mounting groove; 19-Rotating roller; 20-Mounting frame; 21-Sampling valve; 22-Feeding rack; 23-Feeding pipe; 24-Equipment chamber; 25-Fixing ring; 26-Dispersion plate; 27-Mounting base; 28-Nitrogen storage tank; 29-Boosting pump; 30-Boosting injection pipe; 31-Pressure monitoring gauge; 32-Circulating gas pipe; 33-Fixing bolt; 34-Exhaust pipe; 35-Purification box; 36-Filter box; 37-Filter chamber; 38-Adsorption filter packing; 39-Sealing plate; 40-Purification chamber; 41-Circulating pump; 42-Circulating delivery pipe; 43-Atomizing spray frame; 44-Purification nozzle; 45-Exhaust screen; 46-Maintenance valve; 47-Support leg. Detailed Implementation

[0036] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Example: Please refer to Figure 1-9 A nitrogen-filled foam acidification foaming agent mixing reaction device includes: a device base 1 and a mixing reaction vessel 2. The mixing reaction vessel 2 is installed on the upper wall of the device base 1. A rotary rolling dispersion mixing structure is provided on the mixing reaction vessel 2. A static dispersion feeding structure is provided at the top of the mixing reaction vessel 2. A pressurized nitrogen filling structure is installed on the right side of the mixing reaction vessel 2. A residual gas purification and discharge structure is installed behind the pressurized nitrogen filling structure.

[0038] It is important to note that in the refined operation of nitrogen-filled foam acidification foaming production, every step is closely linked and crucial. First, all raw materials used in production must be rigorously screened and precisely measured. For example, the type and amount of foaming agent, as the core raw material for forming the foam structure, directly determine the initial performance of the foam. Foam stabilizers play a key role in stabilizing the foam system and preventing premature foam breakage. Additives, depending on specific production needs, may include thickeners, corrosion inhibitors, etc., to adjust the physicochemical properties of the foam. These raw materials are injected into the mixing reactor 2 at a uniform and stable rate through a carefully designed static dispersion feeding structure. This feeding structure uses a specially designed pipeline and valve system to ensure that the raw materials are fully pre-dispersed before entering the reactor, reducing local concentration differences and laying the foundation for subsequent efficient mixing. Next, the entire production process is started through an intelligent controller tightly integrated with the equipment. This controller integrates advanced automated control algorithms and can automatically adjust the actions of each actuator according to preset production parameters, ensuring the stability and repeatability of the production process. Once the equipment is started... Once activated, the rotary rolling dispersion mixing structure installed on mixing reactor 2 begins efficient operation. This structure employs a multi-stage blade design, generating strong shear force and vortex effect through high-speed rotation, enabling uniform mixing of raw materials at the microscopic level in a very short time, greatly improving mixing efficiency and quality. Simultaneously, acid solution is gradually added to mixing reactor 2. The choice of acid solution depends on specific production requirements; common options include hydrochloric acid (HCl, concentration range controlled at 15%-28% to adapt to acidification needs under different geological conditions), hydrofluoric acid (HF, particularly suitable for acidification treatment of sandstone strata due to its effective dissolution of siliceous minerals), or organic acids (such as acetic acid and formic acid, which have mild corrosiveness and good biodegradability, suitable for applications with high environmental protection requirements). Acid addition must be carried out using a high-precision metering pump to ensure accurate dosage, and the acid concentration is monitored in real-time by an online concentration monitoring system for timely adjustments. During the addition process, the mixing ratio must be precisely controlled to ensure that the final foam quality (dryness) remains stable within the ideal range of 60-80%, while the viscosity is maintained at 50-200. The pressure is between mPa·s to meet the performance requirements of different application scenarios. High-pressure nitrogen is introduced into the mixing reactor 2 through a pressurized nitrogen-filling structure. This structure uses a combination of high-pressure gas cylinder and pressure reducing valve to precisely control the nitrogen filling pressure and flow rate. As nitrogen is continuously added, the gas content in the mixing system gradually increases, interacting with the surfactant in the raw materials to form a stable foam structure. During the mixing process, the reaction can be observed at any time through the sampling section. The sampling section is designed with a quick-closing valve and a transparent observation window, which allows operators to obtain samples without interrupting production and conduct real-time analysis to ensure the controllability of the production process and product quality.After the mixing reaction is completed, excess reaction gas is purified and discharged through a residual gas purification and emission structure. This structure uses highly efficient adsorption materials and filtration devices to effectively remove harmful substances from the gas, such as volatile organic compounds (VOCs) and acidic gases, ensuring that the emitted gas meets national environmental protection standards and preventing environmental pollution. Simultaneously, the structure is equipped with pressure sensors and flow meters to monitor the pressure and flow rate of the emitted gas in real time, ensuring the safety and stability of the emission process. Through this series of refined operations and controls, the production of highly efficient and environmentally friendly nitrogen-filled foam acidifying foaming agents is achieved, providing high-quality product solutions for the petroleum, chemical, and environmental protection industries.

[0039] The rotary rolling dispersion and mixing structure includes: a mixing reaction chamber 3, a drive reducer 4, a drive motor 5, a rotating shaft 6, a first rotating frame 7, three telescopic dispersion and mixing components, several rolling drums 8, a second rotating frame 9, several stirring rods 10, and a discharge pipe 11;

[0040] The mixing reaction chamber 3 is located inside the mixing reactor 2. The drive reducer 4 is installed at the top of the mixing reactor 2. The drive motor 5 is installed on the drive reducer 4 and connected to its drive end. The output end of the drive reducer 4 extends through into the mixing reaction chamber 3. The rotating shaft 6 is installed on the output end of the drive reducer 4. The first rotating frame 7 is fitted on the outer wall of the rotating shaft 6. Three telescopic dispersion and mixing components are installed on the outer wall of the first rotating frame 7. Several rolling cylinders 8 are installed on the inner wall of the mixing reaction chamber 3. The second rotating frame 9 is installed at the lower end of the rotating shaft 6. Several stirring rods 10 are installed on the outer wall of the second rotating frame 9. The discharge pipe 11 is embedded at the lower end of the front wall of the mixing reactor 2.

[0041] It should be noted that the startup and operation of the entire system using the rotary rolling dispersion mixing structure follows a rigorous and precise process. When the operator activates the control system switch, the drive motor 5 begins to run. As the power source for the entire rotary system, the drive motor 5 is stable and provides precise power output. At startup, the drive motor 5 begins to rotate at the set initial speed. Simultaneously, the output shaft of the drive motor 5 is tightly connected to the input shaft of the drive reducer 4. The drive reducer 4 employs a high-precision gear transmission system, capable of precisely adjusting the output speed according to production requirements. After reduction by the drive reducer 4, its output shaft drives the rotating shaft 6 installed inside the mixing reaction chamber 3 to rotate. The rotating shaft 6 is made of high-strength, corrosion-resistant alloy material to ensure stable operation in complex chemical reaction environments. During rotation, the upper end of the rotating shaft 6 is connected via a key to drive the upper... The first rotating frame 7 is installed and rotates synchronously. The first rotating frame 7 is carefully designed so that its structure can evenly distribute the torque from the rotating shaft 6, thereby efficiently mixing the injected materials through the telescopic dispersion and mixing component installed on it. During the mixing process, the telescopic dispersion and mixing component can dynamically adjust its working state according to the characteristics of the materials and the reaction requirements, ensuring that the materials are fully dispersed and mixed in the mixing reaction chamber 3. At the same time, when the rotating shaft 6 rotates, its lower end drives the second rotating frame 9 to rotate through a spline connection. Several stirring rods 10 are evenly distributed on the second rotating frame 9. The stirring rods 10 adopt a special shape and material, which can generate strong shear force and vortex effect during rotation, and assist in mixing the materials. This double mixing method can greatly improve the mixing uniformity and reaction efficiency of the materials, and ensure that the quality of the produced products is stable and reliable.

[0042] In the specific implementation process, a switch valve 12 is further installed on the discharge pipe 11.

[0043] In the specific implementation process, each of the three telescopic dispersion and mixing components includes: a fixed plate 13, a telescopic plate 14, a combined cavity 15, several spring telescopic rods 16, a dispersion and mixing net 17, three mounting slots 18, and three rotating rollers 19.

[0044] The fixed plate 13 is installed on the outer wall of the first rotating frame 7. The combined cavity 15 is opened inside one end of the telescopic plate 14. The telescopic plate 14 is movably installed on the fixed plate 13 through the combined cavity 15. One end of several spring telescopic rods 16 is installed on the inner wall of the combined cavity 15 and the other end is connected to the fixed plate 13. The dispersing and mixing net 17 is embedded in the telescopic plate 14. Three mounting slots 18 are opened on the other end of the telescopic plate 14. Three rotating rollers 19 are installed in the three mounting slots 18.

[0045] It should be noted that when using the telescopic dispersion and mixing assembly, the rotating shaft 6 drives the fixed plate 13 to rotate via the first rotating frame 7. The fixed plate 13, as the basic support structure of the telescopic dispersion and mixing assembly, directly affects the working effect of the entire assembly due to its installation accuracy and stability. During rotation, the fixed plate 13 drives the telescopic plate 14, which is movably mounted on it, to rotate synchronously. A special sliding connection structure is used between the telescopic plate 14 and the fixed plate 13, ensuring smooth movement of the telescopic plate 14 relative to the fixed plate 13 while withstanding various forces and torques generated during rotation. A dispersion and mixing mesh 17 is embedded in the telescopic plate 14. The dispersion and mixing mesh 17 is woven from high-strength, corrosion-resistant metal wire, and its mesh size and shape are carefully designed to effectively disperse and mix materials during rotation. As the telescopic plate 14 rotates, the dispersion and mixing mesh 17 forms complex flow channels in the material, causing the material to undergo strong shearing and dispersion when passing through the mesh, thereby increasing its mixing uniformity and reaction efficiency. During rotation, the telescopic plate... The rotating roller 19 mounted on the outer end mounting groove 18 plays an important role. The rotating roller 19 is made of a material with high wear resistance and low friction coefficient. It can press against the inner wall of the mixing reaction chamber 3 under the support of the spring telescopic rod 16 in the combined cavity 15. The spring telescopic rod 16 has good elasticity and stability and can automatically adjust its length according to the pressure on the rotating roller 19 to ensure that the rotating roller 19 always maintains close contact with the inner wall of the mixing reaction chamber 3. As the telescopic plate 14 rotates, the rotating roller 19 presses against the rolling drum 8. The surface of the rolling drum 8 is specially treated to have a smooth surface and good wear resistance, which can reduce the frictional resistance between it and the rotating roller 19. When the rotating roller 19 contacts the rolling drum 8, it will drive the telescopic plate 14 to reciprocate by cooperating with the compression of the spring telescopic rod 16. The turbulence generated by this reciprocating movement can further break the concentration gradient and velocity gradient in the material, increase the contact area and mixing opportunities between materials, and thus further increase the mixing reaction effect, so that the material reaches a highly uniform mixing state in the mixing reaction chamber 3.

[0046] In the specific implementation process, furthermore, a mounting frame 20 is provided at the front end of the mixing reactor 2, and a pair of sampling valves 21 are provided at the upper and lower positions of the front wall surface of the mounting frame 20.

[0047] In the specific implementation process, the static dispersion feeding structure further includes: a feeding rack 22, a pair of feeding pipes 23, an equipment cavity 24, a pair of fixing rings 25, and several dispersion plates 26;

[0048] The feed rack 22 is installed at the top of the mixing reaction chamber 3. A pair of feed pipes 23 are embedded in the upper wall of the mixing reaction vessel 2 and the lower end is embedded in the feed rack 22. The equipment chamber 24 is opened inside the feed rack 22. A pair of fixing rings 25 are installed in the equipment chamber 24. Several dispersing plates 26 are installed obliquely and crosswise inside the pair of fixing rings 25.

[0049] It should be noted that the operation process and functional design of the static dispersion feeding structure are carefully planned. First, the operator reliably connects the feed pipe 23 to the external feeding equipment. The feed pipe 23 is made of corrosion-resistant and high-strength materials to ensure that no leakage or damage occurs during material conveying. Before production, the operator injects some material into the feed rack 22 through the feed pipe 23 via the external feeding equipment. As the core component of the static dispersion feeding structure, the feed rack 22 has an ingenious internal structure design. Several dispersion plates 26 are installed inside the feed rack 22 through fixing rings 25. The dispersion plates 26 adopt a special inclined cross combination method to form several irregular hole structures. When the raw material is conveyed downward, these irregular hole structures can initially disperse the raw material. When the raw material passes through the hole structure, it is subjected to... The flow direction and speed are changed by the obstruction and guidance of the orifice wall, thereby achieving uniform material discharge and avoiding local accumulation. This initial dispersion effect enables the material to have a certain degree of uniformity before entering the mixing reaction chamber 3, which assists the subsequent dispersion and mixing reaction, improving the efficiency of the entire production process and the quality of the product. When the material is mixed and reacted through the rotating and rolling dispersion and mixing structure, the operator gradually injects acid solution in stages through the feed pipe 23. This staged injection method can ensure that the acid solution and the material are in full contact and react, avoiding excessively high or low local concentrations of acid solution, thereby ensuring the acidification effect and acidification uniformity. At the same time, by precisely controlling the injection volume and injection speed of acid solution, the degree and effect of the acidification reaction can be adjusted according to different production needs and material characteristics, so that the produced products meet the requirements of various application scenarios.

[0050] In the specific implementation process, the pressurized nitrogen filling structure further includes: mounting base 27, nitrogen storage tank 28, pressurized delivery pump 29, pressurized gas injection pipe 30, pressure monitoring gauge 31, and circulating gas pipe 32.

[0051] Mounting base 27 is installed on the right side of mixing reactor 2. Nitrogen storage tank 28 is installed on mounting base 27. Booster pump 29 is installed behind mounting base 27. The inlet of booster pump 29 is connected to the outlet of nitrogen storage tank 28. Booster injection pipe 30 is vertically installed on the injection port at the top of booster pump 29. Pressure monitoring gauge 31 is installed on booster injection pipe 30. Circulating gas pipe 32 is embedded in the inlet of the side wall of mixing reactor 2. The other end of circulating gas pipe 32 is connected to booster injection pipe 30.

[0052] It should be noted that when using the pressurized nitrogen-filled structure, the entire process is closely coordinated with the mixing reaction process and is precise and orderly. When the raw materials begin to mix and react in the mixing reactor 2, at a specific reaction stage, the control system issues a command, and the electric valve opens rapidly. This electric valve has been rigorously selected and features rapid response and high sealing performance, ensuring that there is no nitrogen leakage or material spillage during opening and closing. The booster pump 29, which is securely mounted on the equipment base 1 by fixing bolts 33, is started. The booster pump 29 is driven by a high-performance motor, and its impeller is specially designed to generate strong suction and pressure. After startup, the booster pump 29 begins operation, generating negative pressure at its suction inlet to extract nitrogen from the nitrogen storage tank 28 above the mounting base 27. The nitrogen storage tank 28 is made of high-strength, high-pressure-resistant material and stores high-purity nitrogen to ensure that no impurities are introduced during the nitrogen filling process, affecting the reaction effect. The extracted nitrogen is transported through the booster injection pipe 30, which is made of high-pressure-resistant and corrosion-resistant pipe material with a smooth inner wall to reduce resistance during nitrogen transport. During transport, a portion of the nitrogen is precisely injected into the mixing reaction chamber 3 through the small circulation pipe 32. The carefully designed layout and arrangement ensure that nitrogen is evenly distributed within the mixing chamber 3, allowing it to fully contact the rotating and mixing raw materials. As nitrogen is injected, it rapidly combines with the foaming agent and foam stabilizer in the raw materials. The foaming agent reduces the surface tension of the liquid, making it easier for nitrogen to form bubbles; the foam stabilizer stabilizes the bubble structure, preventing premature bubble collapse. Under the rotating mixing action of the raw materials, nitrogen fully integrates with the foaming agent and foam stabilizer to form stable foam. This foam has high apparent viscosity and shear thinning characteristics, effectively sealing high-permeability layers after injection into the formation, allowing more subsequent acidizing fluid to penetrate low-permeability layers. This enhances the acidification effect, which dissolves blockage substances in the formation, improves reservoir permeability, and makes crude oil flow more easily, thereby increasing the oil recovery rate. During the nitrogen charging process, the pressure inside the mixing reactor 2 is monitored in real time by a pressure monitoring gauge 31 installed on the mixing reactor 2. The pressure monitoring gauge 31 has the characteristics of high precision and fast response, and can transmit pressure data to the control system in real time. The operator can adjust the operating parameters of the booster pump 29 in a timely manner according to the data displayed by the pressure monitoring gauge 31 to ensure that the nitrogen charging pressure is within a suitable range, ensure the nitrogen charging effect, and achieve the best state of foam formation and stability.

[0053] In the specific implementation process, the booster pump 29 is further installed by fixing bolts 33.

[0054] In the specific implementation process, the residual gas purification and emission structure further includes: exhaust pipe 34, purification box 35, filter box 36, filter chamber 37, adsorption filter packing 38, sealing plate 39, purification chamber 40, circulation pump 41, a pair of circulation conveying pipes 42, a pair of atomizing spray racks 43, several purification nozzles 44, exhaust net 45, and a pair of maintenance valves 46.

[0055] One end of the exhaust pipe 34 is located at the top of the booster injection pipe 30. The purification box 35 is installed behind the booster delivery pump 29. The filter box 36 is installed on the upper wall of the purification box 35. The other end of the exhaust pipe 34 is embedded in the filter box 36. The filter chamber 37 is opened inside the filter box 36. The adsorption filter packing 38 is placed inside the filter chamber 37. The sealing plate 39 is installed at the opening on the side wall of the filter box 36. The purification chamber 40 is opened inside the purification box 35 and is connected to the filter chamber 37. The circulation pump 41 is installed in the purification box 35. On the lower wall of the 5th chamber and connected to the purification chamber 40, one end of a pair of circulating conveying pipes 42 is installed on the circulating pump 41, and the other end of the pair of circulating pumps 41 is wrapped around the top of the purification chamber 35 and embedded on the upper wall of the purification chamber 35. A pair of atomizing spray racks 43 are installed on the top wall inside the purification chamber 40. A pair of circulating conveying pipes 42 are connected to a pair of atomizing spray racks 43. Several purification nozzles 44 are installed on a pair of atomizing spray racks 43. An exhaust net 45 is embedded on the right side wall of the purification chamber 35. A pair of maintenance valves 46 are embedded below the exhaust net 45.

[0056] It should be noted that when using the waste gas purification and emission structure, its function is to safely and environmentally treat excess acidic gases after production. As the mixing and stirring reaction of materials continues, nitrogen needs to be introduced to promote foam formation and stabilization. After the acid is injected, acid molecules mix with the excess nitrogen, forming acidic gases. When production is complete, the control system switches the electric valves. The switching action of the electric valves is rapid and accurate, and can promptly change the gas flow direction. At this time, the excess gas is transported to the filter box 36 through the circulating gas pipe 32, the pressurized gas injection pipe 30, and the exhaust pipe 34. The pipeline design fully considers the gas flow characteristics and sealing requirements to ensure smooth and leak-free gas delivery to the filter box 36. Acidic gas is first injected into the filter chamber 37, which is filled with adsorption filter media 38. The adsorption filter media 38 is made of materials with high specific surface area and strong adsorption capacity, such as activated carbon and molecular sieves. When the acidic gas passes through the adsorption filter media 38, the acidic substances and particulate impurities are adsorbed onto the surface of the media, achieving preliminary filtration and purification. The gas after preliminary filtration and purification enters the purification chamber 40, where a circulation pump 4 is installed at the bottom of the purification box 35. 1. Upon startup, the circulating pump 41, designed for corrosion resistance and high flow rate, extracts the purification reaction liquid from the purification chamber 40. This liquid is specially formulated based on the composition of the acidic gas and purification requirements, containing components capable of chemically reacting with acidic substances. The circulating pump 41 pumps the purification reaction liquid upwards through the circulating delivery pipe 42 into the atomizing spray frame 43. Multiple purification nozzles 44 are installed on the atomizing spray frame 43. These nozzles employ a special atomization design to atomize the purification reaction liquid into tiny droplets. These tiny droplets are evenly sprayed downwards within the purification chamber 40, fully contacting and reacting with the rising residual gas. During the contact process, the chemical components in the purification reaction liquid react with the acidic substances in the residual gas, decomposing them into harmless substances and further purifying the residual gas. After two-stage purification, the acidic content of the residual gas is greatly reduced, meeting environmental emission standards. The purified residual gas is discharged through the exhaust net 45, which is made of high-strength, corrosion-resistant material. The size of its mesh is carefully designed to ensure smooth discharge of residual gas while preventing external impurities from entering the purification chamber 35. Through this residual gas purification and discharge structure, safe and environmentally friendly treatment of reaction residual gas is achieved, reducing environmental pollution.

[0057] In the specific implementation process, the purification box 35 is further installed on the equipment base 1 by the support leg 47.

[0058] The working method includes the following steps:

[0059] S1. Connect the feed pipe to the external feeding equipment. Before production, some material is injected into the feed rack through the feed pipe. The dispersion plate inside the feed rack is inclined and crosses to form irregular holes. The material is initially dispersed when it falls to avoid accumulation.

[0060] S2. The rotating shaft drives the fixed plate and the telescopic plate to rotate, dispersing and mixing the material through the mixing net. The rotating rollers on the outside of the telescopic plate are supported by the spring telescopic rod and roll on the wall of the mixing chamber as they rotate, driving the telescopic plate to move back and forth, thus enhancing the turbulent mixing effect.

[0061] S3. While mixing and stirring, inject acid solution in batches through the feed pipe to ensure uniform acidification;

[0062] S4. When mixing and reacting, start the booster pump to extract nitrogen from the storage tank and inject it into the reaction chamber through the booster injection pipe. Nitrogen combines with the foaming agent and foam stabilizer to form stable foam, which improves the permeability of the reservoir. The pressure monitoring instrument monitors the pressure of the reactor in real time to ensure the nitrogen filling effect.

[0063] S5. After the reaction is complete, switch the electric valve to transport the acidic residual gas through the pipeline to the filter box. The gas is initially purified by the filter adsorption packing and then enters the purification chamber. The purification liquid is atomized and sprayed by the circulation pump to decompose the acidic substances in the residual gas. Finally, it is discharged through the exhaust network.

[0064] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A nitrogen-filled foam acidification foaming agent mixing and reaction device, comprising: The equipment base (1) and the mixing reactor (2) are characterized in that the mixing reactor (2) is installed on the upper wall of the equipment base (1), the mixing reactor (2) is provided with a rotary rolling dispersion mixing structure, the top of the mixing reactor (2) is provided with a static dispersion feeding structure, the right side of the mixing reactor (2) is provided with a pressurization and nitrogen filling structure, and the rear of the pressurization and nitrogen filling structure is provided with a residual gas purification and discharge structure. The rotary rolling dispersion mixing structure includes: a mixing reaction chamber (3), a drive reducer (4), a drive motor (5), a rotating shaft (6), a first rotating frame (7), three telescopic dispersion mixing components, several rolling drums (8), a second rotating frame (9), several stirring rods (10), and a discharge pipe (11). The mixing reaction chamber (3) is located inside the mixing reactor (2). The drive reducer (4) is installed at the top of the mixing reactor (2). The drive motor (5) is installed on the drive reducer (4) and connected to its drive end. The output end of the drive reducer (4) extends through into the mixing reaction chamber (3). The rotating shaft (6) is installed on the output end of the drive reducer (4). The first rotating frame (7) is fitted on the outer wall of the rotating shaft (6). Three telescopic dispersion mixing components are installed on the outer wall of the first rotating frame (7). Several rolling cylinders (8) are installed on the inner wall of the mixing reaction chamber (3). The second rotating frame (9) is installed at the lower end of the rotating shaft (6). Several stirring rods (10) are installed on the outer wall of the second rotating frame (9). The discharge pipe (11) is embedded at the lower end of the front wall of the mixing reactor (2).

2. The nitrogen-filled foam acidification foaming agent mixing and reaction equipment according to claim 1, characterized in that, A switch valve (12) is installed on the discharge pipe (11).

3. The nitrogen-filled foam acidification foaming agent mixing and reaction equipment according to claim 1, characterized in that, Each of the three telescopic dispersion mixing components includes: a fixed plate (13), a telescopic plate (14), a combination cavity (15), several spring telescopic rods (16), a dispersion mixing net (17), three mounting slots (18), and three rotating rollers (19). The fixed plate (13) is installed on the outer wall of the first rotating frame (7). The combined cavity (15) is opened inside one end of the telescopic plate (14). The telescopic plate (14) is movably installed on the fixed plate (13) through the combined cavity (15). One end of several spring telescopic rods (16) is installed on the inner wall of the combined cavity (15) and the other end is connected to the fixed plate (13). The dispersing and mixing net (17) is embedded in the telescopic plate (14). Three mounting slots (18) are opened on the other end of the telescopic plate (14). Three rotating rollers (19) are installed on the three mounting slots (18).

4. The nitrogen-filled foam acidification foaming agent mixing and reaction equipment according to claim 1, characterized in that, The mixing reactor (2) is equipped with a mounting bracket (20) at the front end, and a pair of sampling valves (21) are installed on the upper and lower positions of the front wall of the mounting bracket (20).

5. The nitrogen-filled foam acidification foaming agent mixing and reaction equipment according to claim 1, characterized in that, The static dispersion feeding structure includes: a feeding rack (22), a pair of feeding pipes (23), an equipment cavity (24), a pair of fixing rings (25), and several dispersion plates (26); The feed rack (22) is installed at the top of the mixing reaction chamber (3). A pair of feed pipes (23) are embedded on the upper wall of the mixing reaction vessel (2) and the lower end is embedded on the feed rack (22). The equipment chamber (24) is opened inside the feed rack (22). A pair of fixing rings (25) are installed inside the equipment chamber (24). Several dispersing plates (26) are installed obliquely and crosswise inside the pair of fixing rings (25).

6. The nitrogen-filled foam acidification foaming agent mixing and reaction equipment according to claim 1, characterized in that, The pressurized nitrogen filling structure includes: a mounting base (27), a nitrogen storage tank (28), a pressurized delivery pump (29), a pressurized gas injection pipe (30), a pressure monitoring gauge (31), and a circulating gas pipe (32); The mounting base (27) is installed on the right side of the mixing reactor (2), the nitrogen storage tank (28) is installed on the mounting base (27), the booster pump (29) is installed behind the mounting base (27), the air inlet of the booster pump (29) is connected to the discharge hole of the nitrogen storage tank (28), the booster injection pipe (30) is installed vertically on the injection hole at the top of the booster pump (29), the pressure monitoring gauge (31) is installed on the booster injection pipe (30), the circulating gas pipe (32) is embedded in the air inlet on the side wall of the mixing reactor (2), and the other end of the circulating gas pipe (32) is connected to the booster injection pipe (30).

7. The nitrogen-filled foam acidification foaming agent mixing and reaction equipment according to claim 6, characterized in that, The booster pump (29) is mounted on the equipment base (1) by fixing bolts (33).

8. The nitrogen-filled foam acidification foaming agent mixing and reaction equipment according to claim 6, characterized in that, The residual gas purification and emission structure includes: an exhaust pipe (34), a purification box (35), a filter box (36), a filter chamber (37), an adsorption filter packing (38), a sealing plate (39), a purification chamber (40), a circulation pump (41), a pair of circulation delivery pipes (42), a pair of atomizing spray racks (43), several purification nozzles (44), an exhaust net (45), and a pair of maintenance valves (46). One end of the exhaust pipe (34) is located at the top of the booster injection pipe (30). The purification box (35) is installed behind the booster delivery pump (29). The filter box (36) is installed on the upper wall of the purification box (35). The other end of the exhaust pipe (34) is embedded in the filter box (36). The filter chamber (37) is opened inside the filter box (36). The adsorption filter packing (38) is placed inside the filter chamber (37). The sealing plate (39) is installed at the opening of the side wall of the filter box (36). The purification chamber (40) is opened inside the purification box (35). The purification chamber (40) is connected to the filter chamber (37). The circulation pump (41) is installed in the purification box. On the lower wall of the box (35) and connected to the purification chamber (40), one end of a pair of circulating conveying pipes (42) is installed on the circulating pump (41), and the other end of the pair of circulating pumps (41) is wrapped around the top of the purification box (35) and embedded on the upper wall of the purification box (35). A pair of atomizing spray racks (43) are installed on the top wall inside the purification chamber (40). A pair of circulating conveying pipes (42) are connected to a pair of atomizing spray racks (43). Several purification nozzles (44) are installed on a pair of atomizing spray racks (43). An exhaust net (45) is embedded on the right wall of the purification box (35). A pair of maintenance valves (46) are embedded below the exhaust net (45).

9. The nitrogen-filled foam acidification foaming agent mixing and reaction equipment according to claim 8, characterized in that, The purification box (35) is mounted on the equipment base (1) via support legs (47).

10. A working method applied to the nitrogen-filled foam acidifying foaming agent mixing and reaction equipment according to any one of claims 1-9, characterized in that, Includes the following steps: S1. Connect the feed pipe to the external feeding equipment. Before production, some material is injected into the feed rack through the feed pipe. The dispersion plate inside the feed rack is inclined and crosses to form irregular holes. The material is initially dispersed when it falls to avoid accumulation. S2. The rotating shaft drives the fixed plate and the telescopic plate to rotate, dispersing and mixing the material through the mixing net. The rotating rollers on the outside of the telescopic plate are supported by the spring telescopic rod and roll on the wall of the mixing chamber as they rotate, driving the telescopic plate to move back and forth, thus enhancing the turbulent mixing effect. S3. While mixing and stirring, inject acid solution in batches through the feed pipe to ensure uniform acidification; S4. When mixing and reacting, start the booster pump to extract nitrogen from the storage tank and inject it into the reaction chamber through the booster injection pipe. Nitrogen combines with the foaming agent and foam stabilizer to form stable foam, which improves the permeability of the reservoir. The pressure monitoring instrument monitors the pressure of the reactor in real time to ensure the nitrogen filling effect. S5. After the reaction is complete, switch the electric valve to transport the acidic residual gas through the pipeline to the filter box. The gas is initially purified by the filter adsorption packing and then enters the purification chamber. The purification liquid is atomized and sprayed by the circulation pump to decompose the acidic substances in the residual gas. Finally, it is discharged through the exhaust network.

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