A venting device for a storage tank

Abstract

The utility model discloses a kind of storage tank emptying device, including air inlet pipe and shunt pipe and expansion pipe connected in parallel on air inlet pipe, expansion pipe is connected with outer sleeve tube, inner tube is connected in outer sleeve tube, shunt pipe is connected in the tail end of outer sleeve tube, expansion pipe, shunt pipe and outer sleeve tube form rectangle, expansion pipe is located bottom, air inlet pipe is connected in the bottom of expansion pipe, the top end of inner tube is connected emptying pipe.Inclined shunt plate is equipped in the outer side of inner tube, and the packing area of packing area with floating ball is equipped between expansion pipe and outer sleeve tube.Form collaborative flow field after shunt by air flow with pressure into air inlet pipe, and expansion pipe and inner tube-outer sleeve tube space make steam condense, droplet is intercepted by shunt plate, and droplet is backflowed storage tank by expansion pipe and air inlet pipe;Shunt pipe, expansion pipe and shunt plate, floating ball packing area can reduce airflow velocity and noise.The device realizes droplet efficient recovery and noise reduction, reduces waste and potential safety and environmental protection hazard.

Description

Technical Field

[0001] This utility model relates to the field of venting device technology, and in particular to a venting device for a storage tank. Background Technology

[0002] In chemical production, storage tanks require venting systems to release pressure and ensure safety; venting devices are core supporting facilities. During operation, pressure fluctuations occur due to medium evaporation and temperature changes, and venting systems can promptly mitigate overpressure risks. Currently, direct venting is commonly used for storage tanks, where pressurized gas is directly discharged into the atmosphere through a vent pipe. While simple, this method suffers from the ineffective collection of condensed droplets: the gas flow inside the tank often carries saturated vapor and mist-like media; upon contact with cold air at the vent pipe, the vapor condenses into liquid droplets.

[0003] These droplets fall onto the outer wall of the storage tank, the ground, and surrounding equipment. Because chemical media are often corrosive, toxic, or flammable, they can damage the anti-corrosion layer of the storage tank, corrode equipment, and damage instruments, increasing maintenance costs and safety hazards. At the same time, the media is wasted in large quantities, polluting the soil and groundwater, and the accumulation of flammable droplets may also cause a fire.

[0004] In addition, high-speed airflow generates strong aerodynamic noise, and droplet impact exacerbates noise pollution; untreated airflow contains harmful components that are directly discharged into the atmosphere, which also does not meet exhaust emission standards. Summary of the Invention

[0005] The technical problem to be solved by this invention is that when pressurized airflow is discharged, the condensate droplets fall outside the storage tank, are not easy to collect, and generate a lot of noise.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a venting device for a storage tank, including an air inlet pipe and a diverter pipe and an expansion pipe connected in parallel to the air inlet pipe. An outer sleeve is connected to the expansion pipe, and an inner pipe is connected inside the outer sleeve. The diverter pipe is connected to the tail end of the outer sleeve. The expansion pipe, the diverter pipe and the outer sleeve form a rectangle. The expansion pipe is located at the bottom, the air inlet pipe is connected to the bottom of the expansion pipe, and the top end of the inner pipe is connected to the venting pipe.

[0007] Preferably, a flow divider is installed on the outer wall of the inner tube, the flow divider is inclined, and the bottom end of the flow divider faces away from the output end of the flow divider tube.

[0008] Preferably, the flow dividers are equidistantly distributed along the axial direction of the inner tube, and the flow dividers are distributed on both sides of the inner tube.

[0009] Preferably, the width of the diverter plate is greater than half the gap between the inner tube and the outer tube.

[0010] Preferably, a packing zone is provided between the expanded diameter pipe and the outer casing, with filter screens at both ends of the packing zone and a float packing zone in the middle.

[0011] Preferably, the bottom end of the inner tube is the input end, and a gap is provided between the bottom end of the inner tube and the packing area.

[0012] Preferably, the middle part of the inner tube is fixedly connected to one end of the outer tube, and the top end of the inner tube is fixedly connected to the venting tube.

[0013] This utility model provides a venting device for a storage tank, which has the following beneficial effects.

[0014] 1. The design employs a rectangular structure formed by an expansion pipe, a diverter pipe, and an outer casing. After pressurized airflow enters the expansion pipe through the inlet pipe, part of the airflow flows along the expansion pipe into the gap between the outer casing and the inner pipe, while the other part flows directly into the tail end of the outer casing through the diverter pipe, forming a cooperative flow field. The airflow velocity decreases within the expansion pipe, and the spatial constraint between the outer and inner casing allows sufficient time for saturated vapor and mist-like media entrained in the airflow to condense into droplets. The diverter plate, inclined on the outer wall of the inner pipe, guides the airflow and intercepts droplets. The collected droplets flow back to the storage tank through the expansion pipe and the inlet pipe, achieving droplet collection, reducing media waste, and lowering safety hazards and maintenance costs caused by droplet corrosion of equipment and environmental pollution.

[0015] 2. Compared with the inlet pipe, the diverter and expansion pipe increase the gas flow space, allowing the air pressure to be fully released and the flow velocity to be reduced. In addition, the venting device is equipped with a diverter plate and a float packing area, which can effectively reduce the noise generated by the airflow during venting. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0017] In the diagram: 1. Inlet pipe; 2. Diverter pipe; 3. Expander pipe; 4. Packing area; 5. Outer casing; 6. Inner pipe; 7. Diverter plate; 8. Vent pipe. Detailed Implementation

[0018] like Figure 1 As shown, this utility model provides a venting device for a storage tank, including an air inlet pipe 1 and a diverter pipe 2 and an expansion pipe 3 connected in parallel to the air inlet pipe 1. An outer sleeve 5 is connected to the expansion pipe 3, and an inner pipe 6 is connected inside the outer sleeve 5. The diverter pipe 2 is connected to the tail end of the outer sleeve 5. The expansion pipe 3, the diverter pipe 2, and the outer sleeve 5 form a rectangle. The expansion pipe 3 is located at the bottom, the air inlet pipe 1 is connected to the bottom of the expansion pipe 3, and the top end of the inner pipe 6 is connected to a venting pipe 8.

[0019] The inlet pipe 1 is connected to the storage tank. When the storage tank is vented, the venting air flow inside the tank is output through the inlet pipe 1. The venting air flow enters the diverter pipe 2 and the expansion pipe 3 through the inlet pipe 1. The airflow in the diverter pipe 2 enters the gap between the outer sleeve 5 and the inner pipe 6, flows along the outer sleeve 5, and finally enters the inner pipe 6. The venting air flow in the expansion pipe 3 enters the bottom of the outer sleeve 5 and directly enters the inner pipe 6. The venting air flow entering the inner pipe 6 all enters the venting pipe 8 for final venting. When the venting air flow flows inside the venting device, the venting air flow is diverted by the inlet pipe 1. Due to the increased space during the diversion process, the pressure of the venting air flow is fully released, and the flow velocity decreases. The venting air condenses into liquid inside the venting device. Due to the positional arrangement of the expansion pipe 3, the diverter pipe 2, and the outer sleeve 5, the condensed liquid can flow down through the expansion pipe 3 and enter the inlet pipe 1, returning to the inside of the storage tank.

[0020] like Figure 1 As shown. A flow divider 7 is installed on the outer wall of the inner tube 6. The flow divider 7 is inclined, and the bottom end of the flow divider 7 faces away from the output end of the flow divider 2. The venting air flow out of the flow divider 2 passes through the gap between the inner tube 6 and the outer tube 5. The venting air flow contacts the flow divider 7, and the liquid condensed on the flow divider 7 drips into the expansion tube 3 at the bottom of the venting device.

[0021] like Figure 1 As shown. The flow dividers 7 are equidistantly distributed along the axial direction of the inner tube 6, and are located on both sides of the inner tube 6. The uniformly arranged flow dividers 7 can fully contact the passing venting air flow, thus ensuring sufficient condensation of the liquid in the venting air flow.

[0022] In a preferred embodiment of this invention, to increase the contact area between the venting airflow and the diverter plate 7, the width of the diverter plate 7 is greater than half the gap between the inner tube 6 and the outer tube 5.

[0023] like Figure 1 As shown in the diagram, a packing zone 4 is provided between the expanding pipe 3 and the outer casing 5. Filter screens are provided at both ends of the packing zone 4, and a float packing zone is provided in the middle. When the venting airflow from the expanding pipe 3 enters the packing zone 4, the packing zone 4 can adsorb the suspended droplets in the venting airflow.

[0024] like Figure 1 As shown. The bottom end of the inner tube 6 is the input end, and a gap is provided between the bottom end of the inner tube 6 and the packing area 4. The venting liquid output from the vent pipe 3 and the diversion pipe 2 can smoothly enter the inner tube 6 for external discharge.

[0025] like Figure 1As shown, to ensure the stability of the inner tube 6 installation, the middle part of the inner tube 6 is fixedly connected to one end of the outer tube 5, and the top end of the inner tube 6 is fixedly connected to the vent pipe 8.

Claims

1. A venting device for a storage tank, characterized in that: It includes an intake pipe (1) and a split pipe (2) and an expansion pipe (3) connected in parallel to the intake pipe (1). An outer tube (5) is connected to the expansion pipe (3). An inner tube (6) is connected inside the outer tube (5). The split pipe (2) is connected to the tail end of the outer tube (5). The expansion pipe (3), the split pipe (2) and the outer tube (5) form a rectangle. The expansion pipe (3) is located at the bottom. The intake pipe (1) is connected to the bottom of the expansion pipe (3). The top end of the inner tube (6) is connected to the vent pipe (8).

2. The venting device for a storage tank as described in claim 1, characterized in that: A flow divider plate (7) is installed on the outer wall of the inner tube (6). The flow divider plate (7) is inclined and the bottom end of the flow divider plate (7) faces away from the output end of the flow divider tube (2).

3. The venting device for a storage tank as described in claim 2, characterized in that: The flow divider (7) is equidistantly distributed along the axial direction of the inner tube (6), and the flow divider (7) is distributed on both sides of the inner tube (6).

4. The venting device for a storage tank as described in claim 3, characterized in that: The width of the diverter plate (7) is greater than half the gap between the inner tube (6) and the outer tube (5).

5. The venting device for a storage tank as described in claim 1, characterized in that: A packing area (4) is provided between the expansion pipe (3) and the outer sleeve (5). Filter screens are provided at both ends of the packing area (4), and a float packing area is provided in the middle.

6. The venting device for a storage tank as described in claim 5, characterized in that: The bottom end of the inner tube (6) is the input end, and a gap is provided between the bottom end of the inner tube (6) and the packing area (4).

7. The venting device for a storage tank as described in claim 1, characterized in that: The middle part of the inner tube (6) is fixedly connected to one end of the outer tube (5), and the top end of the inner tube (6) is fixedly connected to the venting tube (8).

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