Liquid separation and backfire prevention integrated safety equipment
By employing an integrated safety device for liquid separation and backfire prevention with coaxial upper and lower components in the flare gas, and utilizing a multi-layered grid structure for gas-liquid separation, the backfire problem caused by mist in the flare gas is solved, improving the liquid separation effect and equipment stability, and preventing explosions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-10
- Publication Date
- 2026-03-13
AI Technical Summary
Flare gas contains light hydrocarbons and other components that are easily volatile and form mist, which can lead to backfire. Existing equipment has poor liquid separation performance and cannot effectively prevent backfire from causing an explosion.
Design a liquid separation and backfire prevention integrated safety device, which adopts a lower cylinder and an upper cylinder arranged coaxially, and has a liquid separation component inside, including an upper mesh component and a lower mesh component. It uses a multi-layer mesh structure of return wire mesh and dense wire mesh to perform gas-liquid separation, and achieves effective separation of mist through guide holes and gravity.
It improves the separation efficiency of mist in flare gas, reduces the risk of backfire, enhances equipment stability, prevents backfire propagation, and ensures safety.
Smart Images
Figure CN223988236U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of petrochemical tail gas treatment technology, and in particular to an integrated safety device for liquid separation and backfire prevention. Background Technology
[0002] In petrochemical production processes, if the flare gas contains a large amount of volatile light hydrocarbons and other components, these components are prone to volatilization and gaseous formation when the pressure and temperature conditions of the flare system change, while simultaneously carrying some liquid to form a mist. In addition, when the flare gas contains high-viscosity liquids or substances with high surface tension, the liquids are not easily separated by gravity and are easily entrained by the gas flow to form a mist. Furthermore, high surface tension causes the liquid to tend to form stable small droplets when impacted by the gas flow, rather than coalescing into larger droplets for separation.
[0003] The presence of mist can alter the flow characteristics and combustion performance of flare gas. When the flow rate of flare gas is unstable or the combustion conditions are poor, backfire may occur, and the flame may propagate backward along the flare pipe, causing an explosion that can severely damage the flare system and surrounding facilities and threaten personnel safety.
[0004] In summary, there is an urgent need to install a backfire prevention safety device in flare pipelines that has good liquid separation effect and strong stability. Utility Model Content
[0005] This invention provides a backfire prevention safety device with good liquid separation effect and strong stability.
[0006] To achieve the above objectives, this utility model provides the following technical solution: an integrated safety device for liquid separation and backfire prevention, comprising a connector and a liquid separation assembly, an upper cylinder being disposed above a lower cylinder, the lower cylinder and the upper cylinder being coaxially arranged, a connector being disposed at the upper opening of the lower cylinder and the lower opening of the upper cylinder, the lower cylinder and the upper cylinder being fixedly connected by their respective connectors, a liquid separation assembly being disposed inside the connector disposed at the upper opening of the lower cylinder, the liquid separation assembly comprising an upper mesh component and a lower mesh component, the upper mesh component being disposed above the lower mesh component.
[0007] Preferably, the connector includes an inner cylinder and an outer cylinder. The inner cylinder of the connector located in the lower cylinder is disposed inside the lower cylinder, and the inner cylinder of the connector located in the upper cylinder is disposed inside the upper cylinder. One end of the inner cylinder is fixedly connected to an end plate, and the outer cylinder is sleeved on the outside of the inner cylinder. The outer cylinder is fixed to the end plate, and an annular groove is provided between the inner cylinder and the outer cylinder.
[0008] Preferably, the lower cylinder and the upper cylinder have the same inner diameter, the lower cylinder and the upper cylinder have the same outer diameter, the inner cylinder has the same outer diameter as the lower cylinder, and the outer cylinder has the same inner diameter as the lower cylinder.
[0009] Preferably, the length of the inner cylinder is greater than the length of the outer cylinder.
[0010] Preferably, the upper mesh component includes an upper ring and a dense wire mesh, the upper ring being fixed inside the inner cylinder, and the dense wire mesh being disposed at the upper opening of the upper ring.
[0011] Preferably, a transition ring is fixedly connected to the upper opening edge of the upper ring.
[0012] Preferably, the lower mesh component includes a lower ring and a return wire mesh, the lower ring being fixed inside the inner cylinder, and the return wire mesh being disposed at the lower end opening of the lower ring.
[0013] Preferably, the outer diameter of the upper ring is the same as the inner diameter of the inner cylinder, the outer diameter of the lower ring is the same as the inner diameter of the inner cylinder, a rib is provided between the return wire mesh and the dense wire mesh, the rib is fixedly connected to both the return wire mesh and the dense wire mesh, and the rib is fixed to the upper ring.
[0014] Preferably, the return wire mesh is composed of multiple grid units arranged and fixedly, each grid unit is composed of four wires, the four wires form a four-sided pyramid frame, the lower ends of the four wires are fixed together, and the free ends of the four wires in the same grid unit are respectively fixedly connected to the free ends of the wires in the adjacent grid units.
[0015] Preferably, a guide hole is provided at the connection position of the four steel wires in the same grid unit.
[0016] Compared with the prior art, the beneficial effects of this utility model are:
[0017] The gas mixed with mist is discharged from the lower cylinder. When it passes through the liquid separation component, some of the mist is separated by the return wire mesh and adheres to the bottom of the return wire mesh. After collecting, it falls downward. The other part enters the space between the return wire mesh and the dense wire mesh with the gas. When it passes through the dense wire mesh, it is further separated. The separated droplets remain inside the space and adhere to the bottom of the dense wire mesh and the upper surface of the return wire mesh. After collecting, they fall downward. Due to the gravity of the droplets, more droplets will adhere to the return wire mesh. The large droplets that collect will move downward along the downward inclined wires of each grid unit of the return wire mesh under the action of gravity. They will be discharged through the guide holes opened on each grid unit. The inclination angle of the wires ensures that the droplets can slide down smoothly with gravity as the main driving force, reducing the time that the droplets stay on the surface of the return wire mesh. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the integrated safety device for preventing backfire during liquid separation according to this utility model;
[0019] Figure 2 This is a cross-sectional view of the integrated safety device for preventing backfire during liquid separation according to this utility model;
[0020] Figure 3 This is a schematic diagram of the connecting component structure of this utility model;
[0021] Figure 4 This is a cross-sectional view of the connector of this utility model;
[0022] Figure 5 This is a schematic diagram of the liquid separation component structure of this utility model;
[0023] Figure 6 This is a cross-sectional view of the upper mesh component of this utility model;
[0024] Figure 7 This is a schematic diagram of the lower layer mesh structure of this utility model;
[0025] Figure 8 This is a top view of the lower layer mesh of this utility model;
[0026] Figure 9 This is a schematic diagram of the mesh unit structure of the lower layer mesh component of this utility model;
[0027] Figure 10 for Figure 9 Enlarged view of point A.
[0028] The following are the labels in the diagram: 1. Lower cylinder; 2. Upper cylinder; 3. Connector; 31. Inner cylinder; 311. End plate; 32. Outer cylinder; 33. Circular groove; 4. Liquid distribution assembly; 41. Upper mesh; 411. Upper ring; 4111. Rib; 4112. Transition ring; 412. Wire mesh; 42. Lower mesh; 421. Lower ring; 422. Return wire mesh; 4221. Wire strip; 4222. Guide hole. Detailed Implementation
[0029] 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 scope of protection of the present utility model.
[0030] This utility model provides an integrated safety device for preventing backfire during liquid separation, such as... Figure 1 and Figure 2 As shown, the assembly includes a connector 3 and a liquid separation component 4. An upper cylinder 2 is positioned above the lower cylinder 1, and the lower cylinder 1 and upper cylinder 2 are coaxially arranged. Connectors 3 are provided at the upper opening of the lower cylinder 1 and the lower opening of the upper cylinder 2. The lower cylinder 1 and upper cylinder 2 are fixedly connected by their respective connectors 3, employing a coaxial nested design. A sealed connection between the upper cylinder 2 and lower cylinder 1 is achieved through the two connectors 3. Figure 3 As shown, the connector 3 includes an inner cylinder 31 and an outer cylinder 32. The inner cylinder 31 of the connector 3 located in the lower cylinder 1 is disposed inside the lower cylinder 1, and the inner cylinder 31 of the connector 3 located in the upper cylinder 2 is disposed inside the upper cylinder 2. One end of the inner cylinder 31 is fixedly connected to an end plate 311, and the outer cylinder 32 is sleeved on the outside of the inner cylinder 31 and fixed to the end plate 311. Figure 4 As shown, an annular groove 33 is provided between the inner cylinder 31 and the outer cylinder 32.
[0031] The lower cylinder 1 is the flare pipe, and the upper cylinder 2 is the upward extension pipe of the lower cylinder 1.
[0032] like Figure 1 and Figure 2 As shown, the lower cylinder 1 and the upper cylinder 2 have the same inner diameter, the lower cylinder 1 and the upper cylinder 2 have the same outer diameter, the inner cylinder 31 has the same outer diameter as the lower cylinder 1, and the outer cylinder 32 has the same inner diameter as the lower cylinder 1. The length of the inner cylinder 31 is greater than the length of the outer cylinder 32.
[0033] Two connectors 3 are respectively fitted onto the upper end of the lower cylinder 1 and the lower end of the upper cylinder 2. The upper end of the lower cylinder 1 is inserted into the annular groove 33 of the corresponding connector 3, and the lower end of the upper cylinder 2 is inserted into the annular groove 33 of the corresponding connector 3. The end plates 311 of the two connectors 3 are fitted together. By setting multiple fixing bolts through the two end plates 311, the upper cylinder 2 and the lower cylinder 1 can be fixedly connected together. The installation and disassembly process is simple and quick.
[0034] like Figure 2 As shown, a liquid separation component 4 is installed inside the connector 3 at the upper opening of the lower cylinder 1. The liquid separation component 4 is integrated inside the connector 3, combining efficient liquid separation with anti-backfire functions. Through the multi-layered mesh structure and flow guiding design of the liquid separation component 4, the problems of light hydrocarbon mist entrainment and backfire in the flare gas are solved. Figure 5 As shown, the liquid separation assembly 4 includes an upper mesh component 41 and a lower mesh component 42, with the upper mesh component 41 positioned above the lower mesh component 42. The upper mesh component 41 and the lower mesh component 42 work together through a hierarchical structure to enhance the liquid separation effect. The upper mesh component 41 includes an upper ring 411 and a dense wire mesh 412. The upper ring 411 is fixed inside the inner cylinder 31, and its outer diameter matches the inner diameter of the inner cylinder 31. The dense wire mesh 412 is positioned at the upper opening of the upper ring 411. Figure 6 As shown, a transition ring 4112 is fixedly connected to the upper opening edge of the upper ring 411. The cross-section of the transition ring 4112 is a right triangle, and the inclined surface formed by the hypotenuse of the right triangle cross-section is the transition surface. The upper end of the inclined surface is in contact with the inner side of the inner cylinder 31, and the lower end of the inclined surface is flush with the upper opening edge of the upper ring 411.
[0035] like Figure 7 and Figure 8 As shown, the lower mesh component 42 includes a lower ring 421 and a return wire mesh 422. The lower ring 421 is fixed inside the inner cylinder 31, and the outer diameter of the lower ring 421 is the same as the inner diameter of the inner cylinder 31. The return wire mesh 422 is set at the lower end opening of the lower ring 421.
[0036] The upper ring 411 is fixed in the inner cylinder 31 of the connector 3 on the lower cylinder 1. The wire mesh 412 is fixed at the upper opening of the upper ring 411. The lower ring 421 is fixed at the bottom of the upper ring 411 and fixed to the inner cylinder 31. The return wire mesh 422 is fixed at the lower opening of the upper ring 411. This arrangement maximizes the distance between the wire mesh 412 and the return wire mesh 422, effectively increasing the capacity of the internal space.
[0037] like Figure 9 and Figure 10As shown, the return wire mesh 422 is composed of multiple fixedly arranged grid units, which are stably connected to each other. Each grid unit consists of four wires 4221, which form a four-sided pyramid frame. The lower ends of the four wires 4221 are fixed together, and the free ends of the four wires 4221 in the same grid unit are fixedly connected to the free ends of the wires 4221 in the adjacent grid unit. A guide hole 4222 is provided at the connection point of the four wires 4221 in the same grid unit.
[0038] When the gas carrying mist rises from the lower cylinder 1 at a certain speed through the wire mesh 412 and the return wire mesh 422, the gas can easily pass through the gaps in the wire mesh. However, due to the inertia caused by the large mass of the droplets in the mist, they cannot change their trajectory in time and thus collide with the wires, and the droplets will remain on the surface of the wires.
[0039] If the flare gas contains large-diameter droplets, these droplets will be intercepted by the wire mesh as they pass through, thus achieving gas-liquid separation. For smaller droplets, Brownian motion will occur due to the thermal motion of the gas molecules. Under the influence of Brownian motion, these tiny droplets will continuously undergo random movement within the gas, increasing the chance of collision with the wire mesh filaments and thus being captured by the mesh.
[0040] The mist adhering to the surface of the wire mesh will gradually gather into larger droplets under the influence of gravity. These large droplets flow downwards along the wire mesh under the continuous action of gravity. When the gravity is strong enough, the droplets will separate from the wire mesh and fall, thus separating from the gas.
[0041] The gas mixed with mist is discharged from the lower cylinder 1. When it passes through the liquid separator 4, part of the mist is first separated by the return wire mesh 422, adhering to the bottom of the return wire mesh 422, and then falling downwards after gathering. The other part enters the space between the return wire mesh 422 and the dense wire mesh 412 with the gas. When it passes through the dense wire mesh 412, it is further separated. The separated droplets remain inside the space, adhering to the bottom of the dense wire mesh 412 and the upper surface of the return wire mesh 422. After collecting and falling downwards, due to the gravity of the droplets, more droplets will adhere to the return wire mesh 422. The large droplets that are collected will move downwards along the downward-sloping wires 4221 of each grid unit of the return wire mesh 422 under the action of gravity, and will be discharged through the guide holes 4222 opened on each grid unit. The tilt angle of the wires 4221 ensures that the droplets can slide down smoothly with gravity as the main driving force, reducing the time that the droplets stay on the surface of the return wire mesh 422.
[0042] The lower-layer return wire mesh 422 has a special mesh structure that effectively increases the contact area between the airflow and the liquid, facilitating greater liquid contact with the mesh and allowing droplets to adhere to and coalesce on the mesh surface. The dense wire mesh 412 and the return wire mesh 422 are arranged vertically, and this double-layer mesh design allows the liquid to have more contact with the mesh as it passes through the equipment, thereby improving separation efficiency.
[0043] like Figure 5 As shown, a rib plate 4111 is provided between the return wire mesh 422 and the dense wire mesh 412. The rib plate 4111 is fixedly connected to both the return wire mesh 422 and the dense wire mesh 412, and is fixed to the upper ring 411. The upper ring 411 and the lower ring 421 are fixed by the rib plate 4111, forming a rigid support frame to avoid deformation or breakage caused by single-point stress.
[0044] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.
Claims
1. A liquid separation and backfire prevention integrated safety device, characterized in that, The device includes a connector (3) and a liquid separation assembly (4). An upper cylinder (2) is provided above the lower cylinder (1). The lower cylinder (1) and the upper cylinder (2) are coaxially arranged. A connector (3) is provided at the upper opening of the lower cylinder (1) and the lower opening of the upper cylinder (2). The lower cylinder (1) and the upper cylinder (2) are fixedly connected by their respective connectors (3). The liquid separation assembly (4) is provided inside the connector (3) provided at the upper opening of the lower cylinder (1). The liquid separation assembly (4) includes an upper mesh (41) and a lower mesh (42). The upper mesh (41) is located above the lower mesh (42).
2. The integrated safety device for preventing backfire during liquid separation according to claim 1, characterized in that, The connector (3) includes an inner cylinder (31) and an outer cylinder (32). The inner cylinder (31) of the connector (3) located in the lower cylinder (1) is disposed inside the lower cylinder (1). The inner cylinder (31) of the connector (3) located in the upper cylinder (2) is disposed inside the upper cylinder (2). One end of the inner cylinder (31) is fixedly connected to an end plate (311). The outer cylinder (32) is sleeved on the outside of the inner cylinder (31) and fixed on the end plate (311). An annular groove (33) is provided between the inner cylinder (31) and the outer cylinder (32).
3. The integrated safety device for preventing backfire during liquid separation according to claim 2, characterized in that, The lower cylinder (1) has the same inner diameter as the upper cylinder (2), the lower cylinder (1) has the same outer diameter as the upper cylinder (2), the inner cylinder (31) has the same outer diameter as the lower cylinder (1), and the outer cylinder (32) has the same inner diameter as the lower cylinder (1).
4. The integrated safety device for preventing backfire during liquid separation according to claim 3, characterized in that, The length of the inner cylinder (31) is greater than the length of the outer cylinder (32).
5. The integrated safety device for preventing backfire during liquid separation according to claim 2, characterized in that, The upper mesh component (41) includes an upper ring (411) and a dense wire mesh (412). The upper ring (411) is fixed inside the inner cylinder (31), and the dense wire mesh (412) is disposed at the upper opening of the upper ring (411).
6. The integrated safety device for preventing backfire during liquid separation according to claim 5, characterized in that, A transition ring (4112) is fixedly connected to the upper opening edge of the upper ring (411).
7. The integrated safety device for preventing backfire during liquid separation according to claim 5, characterized in that, The lower mesh (42) includes a lower ring (421) and a return wire mesh (422). The lower ring (421) is fixed inside the inner cylinder (31), and the return wire mesh (422) is disposed at the lower end opening of the lower ring (421).
8. The integrated safety device for preventing backfire during liquid separation according to claim 7, characterized in that, The outer diameter of the upper ring (411) is the same as the inner diameter of the inner cylinder (31), and the outer diameter of the lower ring (421) is the same as the inner diameter of the inner cylinder (31). A rib (4111) is provided between the return wire mesh (422) and the wire mesh (412). The rib (4111) is fixedly connected to both the return wire mesh (422) and the wire mesh (412). The rib (4111) is fixed on the upper ring (411).
9. The integrated safety device for preventing backfire during liquid separation according to claim 7, characterized in that, The return wire mesh (422) is composed of multiple grid units arranged and fixed. Each grid unit consists of four wires (4221). The four wires (4221) form a four-sided pyramid frame. The lower ends of the four wires (4221) are fixed together. The free ends of the four wires (4221) in the same grid unit are respectively fixedly connected to the free ends of the wires (4221) in the adjacent grid unit.
10. The integrated safety device for preventing backfire during liquid separation according to claim 9, characterized in that, A guide hole (4222) is provided at the connection position of the four steel wires (4221) in the same grid unit.