A pulse gas mixer for large storage tanks

Abstract

This utility model discloses a pulse gas mixer for large storage tanks, including an inlet mechanism for supplying gas and a gas distribution structure installed inside the large storage tank to promote material mixing via airflow. The gas distribution structure and the inlet mechanism are connected by a pipeline with a pulse control valve. The gas distribution structure includes a top annular gas collecting pipe, a bottom annular gas outlet pipe, and at least two vertical tubular distributors. The upper end of the vertical tubular distributor is connected to the top annular gas collecting pipe, and the lower end of the vertical tubular distributor is connected to the bottom annular gas outlet pipe. Gas outlet holes are evenly distributed on both the vertical tubular distributor and the bottom annular gas outlet pipe. Compared with traditional centrifugal pump circulation, this utility model effectively reduces energy consumption; it eliminates mechanical friction and heat generation, avoiding solid dissolution and loss caused by material temperature rise; it achieves mixing without dead zones, preventing pipe blockage; and the equipment has no rotating parts, resulting in low maintenance costs. It is suitable for solid-liquid mixing scenarios in various large storage tanks.

Description

Technical Field

[0001] This utility model belongs to the technical field of material mixing equipment, specifically relating to a pulse gas mixer for large storage tanks. Background Technology

[0002] In industrial production such as chemical, food, and pharmaceutical manufacturing, large storage tanks are often used to store solid-liquid mixtures. To prevent solid particles from settling at the bottom of the tank and causing pipe blockages, and to ensure uniform mixing of materials, continuous or periodic mixing of the solid-liquid mixture within the storage tank is required. Currently, the industry commonly uses centrifugal pumps for circulation to achieve solid-liquid mixing, but this method has the following significant drawbacks: 1) Excessive energy consumption: Centrifugal pumps need to operate for a long time or at high frequency to maintain circulation. For large storage tanks, the power demand is large, which leads to a significant increase in production energy consumption, which is not in line with the industry development trend of energy conservation and consumption reduction. 2) Material temperature rise: The heat generated by the mechanical energy conversion during the operation of the centrifugal pump will be transferred to the material, causing the material temperature to rise. For temperature-sensitive materials, high temperature can easily cause solid materials to dissolve, destroy the stability of the solid-liquid mixture system, and at the same time cause excessive loss of solid materials. 3) High equipment maintenance costs: When centrifugal pumps process mixtures containing solid particles for a long time, components such as impellers and pump casings are prone to wear and tear, requiring frequent maintenance and replacement, which increases equipment maintenance costs and downtime. 4) Limited mixing uniformity: Centrifugal pump circulation mixing relies on the forced flow of materials. For corners and bottom areas of large storage tanks, there are often mixing dead zones, and solid particles may still accumulate locally, increasing the risk of pipeline blockage. Therefore, there is an urgent need for a large-scale solid-liquid mixing device for storage tanks that has low energy consumption, no significant temperature rise, good mixing effect, and simple maintenance, in order to solve the problems existing in the current technology. Utility Model Content

[0003] To address the aforementioned problems, the purpose of this utility model is to provide a pulse gas mixer for large storage tanks.

[0004] The specific technical solution is as follows: A pulse gas mixer for a large storage tank includes an inlet mechanism for supplying gas and a gas distribution structure located inside the large storage tank to promote material mixing by airflow. The gas distribution structure and the inlet mechanism are connected by a pipeline, on which a pulse control valve is provided. The gas distribution structure includes a top annular gas collecting pipe, a bottom annular gas venting pipe, and at least two vertical tubular distributors. The upper end of the vertical tubular distributor is connected to the top annular gas collecting pipe, and the lower end of the vertical tubular distributor is connected to the bottom annular gas venting pipe. Gas outlet holes are uniformly opened on both the vertical tubular distributor and the bottom annular gas venting pipe.

[0005] Furthermore, the vertical tubular distributors are evenly distributed along the circumference of the inner wall of the large storage tank.

[0006] Furthermore, the air outlet of the vertical tube distributor is inclined downward, and the angle between the axis of the air outlet and the vertical direction is 30-60 degrees. The air outlet of the bottom annular air outlet is inclined on the lower surface of the bottom annular air outlet, and the diameter of the air outlet is 5-15mm.

[0007] Furthermore, the distance between the bottom annular vent pipe and the bottom surface of the large storage tank is 10-30cm.

[0008] Furthermore, the air intake mechanism includes an air source buffer tank and a main air intake pipe. The air source buffer tank is connected to one end of the main air intake pipe, and the other end of the main air intake pipe is connected to a set of branch pipes. The set of branch pipes are evenly distributed and are respectively connected to the top annular air collection pipe, the bottom annular air outlet pipe and the vertical pipe distributor. The pulse control valve is located on the branch pipe.

[0009] Furthermore, a pressure regulating valve and a pressure gauge are installed on the main intake pipe.

[0010] The beneficial effects of this utility model are as follows: By replacing centrifugal pump circulation with pulsed gas disturbance, only intermittent supply of high-pressure air is required, which significantly reduces energy consumption and greatly reduces production and operating costs. There is no mechanical friction to generate heat during gas mixing, which will not cause the material temperature to rise, effectively preventing the solid material from dissolving due to temperature rise and reducing material loss; The porous structure of the vertical tube distributor sprays pulsed gas at an oblique angle, which can create an all-round circulation and stirring effect in the storage tank, eliminate mixing dead zones, and prevent solid particles from depositing and pipe blockage. The device has no rotating parts and controls the gas flow solely through valves, which reduces equipment wear and the probability of failure, thus lowering maintenance costs. The pulse parameters can be flexibly adjusted according to the tank size and material characteristics, making it suitable for processing solid-liquid mixtures with different viscosities and solid particle contents. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram showing the connection between multiple vertical tubular distributors and the top annular gas collection pipe.

[0012] In the diagram: 1. Large storage tank; 2. Gas distribution structure; 21. Top annular gas collecting pipe; 22. Bottom annular gas outlet pipe; 23. Vertical pipe distributor; 3. Gas inlet mechanism; 31. Gas source buffer tank; 32. Main gas inlet pipe; 4. Pulse control valve; 5. Pressure regulating valve; 6. Pressure gauge. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited thereto.

[0014] like Figure 1 As shown, a pulse gas mixer for a large storage tank includes an air inlet mechanism 3 for supplying gas and a gas distribution structure 2 disposed within the large storage tank 1 to promote material mixing by airflow. The gas distribution structure 2 includes a top annular gas collecting pipe 21, a bottom annular gas outlet pipe 22, and at least two vertical tubular distributors 23. The upper end of the vertical tubular distributor 23 is connected to the top annular gas collecting pipe 21, and the lower end of the vertical tubular distributor 23 is connected to the bottom annular gas outlet pipe 22. All vertical tubular distributors 23 are evenly distributed circumferentially along the inner wall of the large storage tank 1. The length of each vertical tubular distributor 23 is adapted to the depth of the large storage tank 1. Gas outlet holes are evenly opened on both the vertical tubular distributors 23 and the bottom annular gas outlet pipe 22. Figure 1 The example shown is when two vertical tube distributors 23 are used. In practice, other methods can also be used, such as... Figure 2 (As shown in the diagram, multiple vertical tubular distributors 23) have their air outlets tilted downwards, with the axis of the air outlet making an angle of 30-60 degrees with the vertical direction. The spacing between the air outlets is 20-50 mm. The air outlet of the bottom annular air outlet pipe 22 is tilted on its lower surface, with a diameter of 5-15 mm. The distance between the bottom annular air outlet pipe 22 and the inner bottom surface of the large storage tank 1 is 10-30 cm. The air intake mechanism 3 includes an air source buffer tank 31 and a main air intake pipe 32. One end of the air source buffer tank 31 is connected to the main air intake pipe 32. The main intake pipe 32 is connected to a set of branch pipes at the other end. The branch pipes are evenly distributed and are connected to the top annular gas collecting pipe 21, the bottom annular gas outlet pipe 22 and the vertical pipe distributor 23 respectively. A pulse control valve 4 is provided on the branch pipe. The pulse control valve 4 is an electromagnetic pulse valve. The pulse interval time and the duration of a single air passage can be adjusted by the control system. The pulse interval time is set to 10-60 seconds and the duration of a single air passage is set to 2-10 seconds. The main intake pipe 32 is provided with a pressure regulating valve 5 and a pressure gauge 6 to control the pressure of the incoming gas. The working pressure range is 0.2-0.8 MPa.

[0015] Initially, the pulse control valve 4 is closed, and the external pressurized gas source buffer tank 31 is disconnected from the device. When it is necessary to mix the solid-liquid mixture in the large storage tank 1, the gas source buffer tank 31 is opened, the gas pressure is adjusted to the set value through the pressure regulating valve 5, and the pulse control valve 4 is activated to intermittently supply gas according to the preset pulse interval and single ventilation duration. Ventilation stage: High-pressure air enters the top annular gas collecting pipe 21, the bottom annular gas outlet pipe 22, and the vertical tubular distributor 23 through the main air inlet pipe 32, and is ejected through the gas outlet. The high-speed ejected gas forms a violent disturbance and rising airflow in the solid-liquid mixture, which drives the solid particles to disperse and mix them thoroughly with the liquid, preventing solid deposition. Gas shutdown stage: The pulse control valve 4 is closed, and the solid-liquid mixture in the large storage tank 1 settles naturally under the action of gravity. At this time, the gas disturbance stops, accumulating energy for the next pulse ventilation. The above ventilation-shutdown pulse cycle process is repeated to continuously maintain the uniform state of the solid-liquid mixture and avoid solid particle deposition.

Claims

1. A pulse gas mixer for a large storage tank, characterized in that, It includes an air inlet mechanism (3) for providing gas and a gas distribution structure (2) located in a large storage tank (1) to promote the mixing of materials by airflow. The gas distribution structure (2) and the air inlet mechanism (3) are connected by a pipeline, and a pulse control valve (4) is provided on the pipeline. The gas distribution structure (2) includes a top annular gas collecting pipe (21), a bottom annular gas outlet pipe (22) and at least two vertical pipe distributors (23). The upper end of the vertical pipe distributor (23) is connected to the top annular gas collecting pipe (21), and the lower end of the vertical pipe distributor (23) is connected to the bottom annular gas outlet pipe (22). Gas outlet holes are evenly opened on both the vertical pipe distributor (23) and the bottom annular gas outlet pipe (22).

2. The pulse gas mixer for a large storage tank as described in claim 1, characterized in that, Vertical tubular distributors (23) are evenly distributed along the circumference of the inner wall of the large storage tank (1).

3. The pulse gas mixer for a large storage tank as described in claim 1, characterized in that, The air outlet of the vertical tube distributor (23) is inclined downward, and the angle between the axis of the air outlet and the vertical direction is 30-60 degrees. The air outlet of the bottom annular air outlet (22) is inclined on the lower surface of the bottom annular air outlet (22), and the diameter of the air outlet is 5-15mm.

4. The pulse gas mixer for a large storage tank as described in claim 1, characterized in that, The distance between the bottom annular vent pipe (22) and the inner bottom surface of the large storage tank (1) is 10-30cm.

5. A pulse gas mixer for a large storage tank as described in claim 1, characterized in that, The air intake mechanism (3) includes an air source buffer tank (31) and a main air intake pipe (32). The air source buffer tank (31) is connected to one end of the main air intake pipe (32), and the other end of the main air intake pipe (32) is connected to a set of branch pipes. The set of branch pipes are evenly distributed and are connected to the top annular air collection pipe (21), the bottom annular air outlet pipe (22), and the vertical pipe distributor (23), respectively.

6. A pulse gas mixer for a large storage tank as described in claim 5, characterized in that, The main intake pipe (32) is equipped with a pressure regulating valve (5) and a pressure gauge (6).

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