A new mechanical nitrogen-filled foam acid liquid production device

Abstract

The utility model discloses a novel mechanical nitrogen -filled foam acid liquid production device, including nitrogen storage tank, one side of nitrogen storage tank is provided with the gas outlet, one side of the gas outlet is connected with nitrogen -filled pipeline, the end of nitrogen -filled pipeline is connected with the jet mixing device, the jet mixing device is venturi structure, the end of nitrogen -filled pipeline is connected with stable air inlet structure, the utility model relates to acid liquid production technical field, this novel mechanical nitrogen -filled foam acid liquid production device, through ring array multi -cannula partial flow gas, realizes the differentiated pressure injection, central high pressure penetration / edge low pressure cyclone, produces vortex shear effect and breaks the nitrogen gas into micron bubble, and the uniformity promotes, and the cooperation both sides pressure difference monitoring and 2 second level dynamic pressure regulating make the acid liquid viscosity adaptability range expand to 50 500cP, and thoroughly solve the problem of mixed unevenness caused by traditional single point gas supply.

Description

Technical Field

[0001] This utility model relates to the field of acid production technology, specifically a novel mechanical nitrogen-filled foam acid production device. Background Technology

[0002] Foam acidification technology involves adding foaming agents and foam stabilizers to a conventional acid system. The mixture is then mixed with gases, typically nitrogen or carbon dioxide, through a foam generator to form a foam system with acid as the continuous phase and bubbles as the dispersed phase. This results in an acidification system that combines the properties of foam fluids with acidification capabilities, and is commonly used in chemical, oil and gas extraction, and cleaning operations.

[0003] Currently, the production of foam acid mainly adopts mechanical nitrogen purging. However, during nitrogen purging, the current foam acid production equipment mainly relies on nitrogen generators to continuously inject nitrogen into the jet mixing device for nitrogen purging and foaming. At present, the jet mixing device and the nitrogen storage tank of the nitrogen generator are mainly connected by pipelines. However, the air pressure and rate of the pipeline structure cannot be adjusted and can only be controlled according to the pressure on one side of the jet mixing device, which easily leads to local uneven mixing. In view of this, in-depth research was conducted on the above problems, which led to this case. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a novel mechanical nitrogen-filled foam acid production device, which solves the existing background technology problems.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a novel mechanical nitrogen-filled foam acid production device, comprising a nitrogen storage tank, an outlet on one side of the nitrogen storage tank, a nitrogen filling pipe connected to one side of the outlet, a jet mixing device connected to the end of the nitrogen filling pipe, the jet mixing device having a Venturi structure, and a stable air inlet structure connected to the end of the nitrogen filling pipe.

[0006] The stable air intake structure includes a connecting pipe connected to a nitrogen filling pipe, a control pump installed on the connecting pipe, an air intake ring sleeve connected to the end of the nitrogen filling pipe, an air intake ring groove opened on the air intake ring sleeve, and several inserts arranged in a ring array on the air intake ring groove.

[0007] The middle section of the jet mixing device is provided with an air inlet pipe, and the air inlet ring is sleeved on the air inlet pipe;

[0008] The air intake pipe is provided with several ports, and several tubes are inserted into several ports, and several tubes are welded to several ports.

[0009] A pressure control valve is provided inside any of the described cannulas.

[0010] Preferably, a flow meter is connected to the connecting pipe, and the flow meter is matched with the control pump.

[0011] Preferably, a main control valve is provided on the air outlet.

[0012] Preferably, a connecting flange extends from one side of the air intake ring, and the end of the nitrogen filling pipe is connected to the connecting flange.

[0013] Preferably, the jet mixing device includes an inlet pipe connected to one end of an air inlet pipe, the diameter of the inlet pipe being larger than the diameter of the air inlet pipe, and an injection pipe connected to the other end of the air inlet pipe, the diameter of the injection pipe being larger than the diameter of the air inlet pipe, and the injection pipe and the connection between the inlet pipe and the air inlet pipe are all transitioned by a conical structure.

[0014] Preferably, a pair of pressure gauges are connected to each side of the injection pipe and the inlet pipe.

[0015] Beneficial effects

[0016] This invention provides a novel mechanical nitrogen-filled foam acid production device. It offers the following advantages: This novel mechanical nitrogen-filled foam acid production device achieves differentiated pressure injection through a ring-array multi-tube gas distribution system. The high-pressure penetration at the center and the low-pressure swirling at the edges generate a vortex shearing effect, breaking the nitrogen gas into micron-sized bubbles, thus improving uniformity. Combined with dual-sided differential pressure monitoring and 2-second dynamic pressure regulation, the viscosity range of the acid solution is extended to 50-500 cP, completely solving the problem of uneven mixing caused by traditional single-point gas supply. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of a novel mechanical nitrogen-filled foam acid production device according to the present invention.

[0018] Figure 2 This is a partial three-dimensional structural diagram of a novel mechanical nitrogen-filled foam acid production device according to the present invention.

[0019] Figure 3 This is a front cross-sectional view of the novel mechanical nitrogen-filled foam acid production device of this utility model.

[0020] Figure 4 This is a side cross-sectional view of the novel mechanical nitrogen-filled foam acid production device of this utility model.

[0021] In the diagram: 1. Air compressor; 2. Refrigerated dryer; 3. Nitrogen generator; 4. Air outlet; 5. Liquid level detection panel; 6. Sealing sleeve; 7. Quick-release assembly; 8. Air supply pipe; 9. Control valve; 10. Ultrasonic monitor; 11. Barometer; 12. Mounting base; 13. Flange plate; 701. Through rod; 702. Sealing ring gasket; 703. Clamping block. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-4 This utility model provides an implementation scheme: the current jet mixing device 4 and the nitrogen storage tank 1 of the nitrogen generator are mainly connected by a pipeline. However, the air pressure and rate of the pipeline structure cannot be adjusted and can only be controlled according to the pressure on one side of the jet mixing device 4, which easily leads to the problem of uneven mixing in some areas.

[0024] According to the instruction manual Figure 1-4 As can be seen, in order to solve the above problems, this application discloses a novel mechanical nitrogen-filled foam acid production device, including a nitrogen storage tank 1, whose outlet 2 is equipped with a DN50 pilot-operated ball valve as a master control switch, and nitrogen is transported to a stable air inlet structure 5 through a nitrogen filling pipeline 3. This structure is connected to the pipeline through an ANS I 150 lb-level concave-convex sealing flange, and the pre-tightening force ≥200 N·m ensures high-pressure sealing;

[0025] According to the instruction manual Figure 1-4 It can be seen that a gas outlet 2 is provided on one side of the nitrogen storage tank 1, and a nitrogen filling pipe 3 is connected to one side of the gas outlet 2. A jet mixing device 4 is connected to the end of the nitrogen filling pipe 3. The jet mixing device 4 has a venturi structure. A stable air inlet structure 5 is connected to the end of the nitrogen filling pipe 3. The stable air inlet structure 5 includes a connecting pipe 51, which is connected to the nitrogen filling pipe 3. A control pump 52 is provided on the connecting pipe 51. An air inlet sleeve 53 is connected to the end of the nitrogen filling pipe 3. An air inlet ring groove 54 is opened on the air inlet ring sleeve 53. Several insertion tubes 55 are arranged in a ring array on the air inlet ring groove 54.

[0026] In the specific implementation process, the connecting pipe 51 of the stable air intake structure 5 integrates a range turbine flow meter 57 and a variable frequency screw control pump 52, which form a closed-loop control: when the flow fluctuation exceeds ±5%, the pump dynamically adjusts the output pressure, which is continuously adjustable, laying the foundation for subsequent mixing uniformity.

[0027] According to the instruction manual Figure 1-4 It is known that the nitrogen filling pipe 3 has a 316L stainless steel inlet ring 53 welded to its end. An annular guide groove is machined inside the ring, and multiple insertion tubes 55 are evenly distributed in the groove. The end of the insertion tube 55 is integrated with a Φ0.5mm self-cleaning filter to prevent acid crystallization and blockage.

[0028] According to the instruction manual Figure 1-4 It can be seen that the air inlet pipe 42 of the jet mixing device 4 has multiple laser-cut insertion ports in the middle section, and the inner wall is plated with a 50μm hard chromium layer for corrosion resistance. After the insertion pipe 55 is inserted, the gap is sealed by argon arc welding to <0.1mm, so that each injection point can be independently pressure regulated.

[0029] Working process and core technology: After nitrogen enters the annular guide groove of the inlet ring 53, it is evenly distributed to 12 insertion tubes 55. Each valve operates independently based on a preset pressure curve. The valves in the central area output a 3MPa high-pressure gas flow to penetrate the mainstream acid liquid, while the valves in the edge area output a 1.5MPa low-pressure gas flow to induce swirling flow, forming a differentiated injection mode. The acid liquid rushes in from the inlet pipe 41 and accelerates through the conical section into the inlet pipe 42. Multiple streams of nitrogen with different pressures are injected radially. The high-pressure gas flow creates violent turbulence in the core area of ​​the pipe, while the low-pressure gas flow generates vortices on the pipe wall. The superposition of the two produces a vortex. The shearing effect breaks nitrogen into micron-sized bubbles, reducing the standard deviation of particle size distribution from the traditional 45μm to 12μm, thus improving uniformity. The mixed fluid enters the injection pipe 43 through the second-stage conical diffuser, where the reduced flow velocity ensures uniform bubble dispersion. During this process, precision pressure gauges installed on both sides of the inlet pipe 41 and the injection pipe 43 monitor the pressure difference in real time. When abnormalities such as sudden viscosity changes are detected, the system increases the opening of the low-pressure zone valve within 2 seconds to enhance the swirling flow. An online laser particle size sensor can be added to the end of the injection pipe 43 to provide real-time feedback on the mixing quality and optimize parameters in conjunction with the control terminal.

[0030] As a preferred option, a flow meter 57 is further connected to the connecting pipe 51, and the flow meter 57 cooperates with the control pump 52 to form a closed-loop feedback system.

[0031] As a preferred option, a main control valve 6 is provided on the air outlet 2, which adopts a pilot-operated ball valve structure.

[0032] As a preferred option, a connecting flange extends from one side of the intake ring 53, and the end of the nitrogen filling pipe 3 is connected to the connecting flange by high-strength bolts. The flange sealing surface adopts a concave-convex design, and the preload force is ≥200 N·m.

[0033] As a preferred embodiment, the jet mixing device 4 further includes an inlet pipe 41 with a diameter larger than that of the air inlet pipe 42 and connected by a 15° tapered transition section. The end of the air inlet pipe 42 transitions to a larger diameter jet pipe 43 with a 15° taper. This dual-diffuser venturi structure reduces pressure loss by 28%.

[0034] As a preferred option, a pair of pressure gauges 44 with an accuracy of ±0.2% are connected to both sides of the injection pipe 43 and the inlet pipe 41, respectively, so that the valves can be controlled in real time to optimize the mixing efficiency.

[0035] In summary, this novel mechanical nitrogen-filled foam acid production device achieves differentiated pressure injection through a ring array multi-tube 55-degree gas distribution. The high-pressure penetration at the center and the low-pressure swirling at the edges generate a vortex shearing effect that breaks the nitrogen into micron-sized bubbles, improving uniformity. Combined with dual-sided differential pressure monitoring and 2-second dynamic pressure regulation, the viscosity range of the acid solution is extended to 50-500 cP, completely solving the problem of uneven mixing caused by traditional single-point gas supply.

[0036] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel mechanical nitrogen-filled foam acid production device, comprising a nitrogen storage tank (1), wherein a gas outlet (2) is provided on one side of the nitrogen storage tank (1), a nitrogen filling pipe (3) is connected to one side of the gas outlet (2), and a jet mixing device (4) is connected to the end of the nitrogen filling pipe (3), characterized in that, The jet mixing device (4) has a venturi structure, and the end of the nitrogen filling pipe (3) is connected to a stable air intake structure (5). The stable air intake structure (5) includes a connecting pipe (51), which is connected to the nitrogen filling pipe (3). A control pump (52) is installed on the connecting pipe (51). An air intake ring (53) is connected to the end of the nitrogen filling pipe (3). An air intake ring groove (54) is opened on the air intake ring (53). Several inserts (55) are arranged in a ring array on the air intake ring groove (54). The middle section of the jet mixing device (4) is provided with an air inlet pipe (42), and the air inlet ring (53) is sleeved on the air inlet pipe (42); The air intake pipe (42) is provided with several ports, and several of the inserts (55) are inserted into several ports, and several inserts (55) are welded to several ports. A pressure control valve (56) is provided inside any of the described cannulas (55).

2. The novel mechanical nitrogen-filled foam acid production device according to claim 1, characterized in that, A flow meter (57) is connected to the connecting pipe (51), and the flow meter (57) is matched with the control pump (52).

3. The novel mechanical nitrogen-filled foam acid production device according to claim 2, characterized in that, A main control valve (6) is provided on the air outlet (2).

4. The novel mechanical nitrogen-filled foam acid production device according to claim 3, characterized in that, A connecting flange extends from one side of the air intake ring (53), and the end of the nitrogen filling pipe (3) is connected to the connecting flange.

5. A novel mechanical nitrogen-filled foam acid production device according to claim 4, characterized in that, The jet mixing device (4) includes an inlet pipe (41) connected to one end of an air inlet pipe (42). The diameter of the inlet pipe (41) is larger than the diameter of the air inlet pipe (42). The other end of the air inlet pipe (42) is connected to a jet pipe (43). The diameter of the jet pipe (43) is larger than the diameter of the air inlet pipe (42). The jet pipe (43) and the connection between the inlet pipe (41) and the air inlet pipe (42) are all transitioned by a conical structure.

6. A novel mechanical nitrogen-filled foam acid production device according to claim 5, characterized in that, A pair of pressure gauges (44) are connected to both sides of the injection pipe (43) and the inlet pipe (41).

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