A multi-layer fiber bed mist eliminator

Abstract

The utility model discloses a multilayer fiber bed demister, including cylindrical shell, the top of casing is equipped with gas outlet, and the bottom is equipped with gas inlet and liquid discharge, the inside of casing is from below to above in proper order provided with multilayer fiber bed subassembly, multilayer fiber bed subassembly is fixed on the inner wall of casing through support frame, support frame with casing detachable connection, the gas inlet admission direction is tangent with the inner wall of casing, and the outer wall of casing is laid with electric heating heat preservation layer, and the utility model discloses compared with prior art advantage lies in: through tangential admission design makes gas produce rotation centrifugal force, can separate part of mist drop in advance, reduces the mist drop concentration of entering fiber bed layer, and gradually increases the multilayer bed layer of fiber density from below to above, can capture different particle size mist drop gradually, significantly reduces the fiber jam probability, prolongs the continuous operation time, and guarantees the demisting efficiency stability.

Description

Technical Field

[0001] This utility model relates to the technical field of fiber demister devices, specifically a multi-layer fiber bed demister. Background Technology

[0002] Fiber bed demisters are commonly used equipment in the field of industrial gas purification. They capture mist droplets in the gas through the interception and inertial collision of fiber materials. They are widely used in industries such as chemical, metallurgy, and energy, and can effectively reduce the moisture content of the gas, ensuring the stable operation of subsequent equipment.

[0003] However, traditional fiber bed demisters have obvious drawbacks: First, they lack a mist pretreatment mechanism, and the gas directly enters the fiber bed. High concentrations of mist droplets can easily cause rapid fiber blockage, requiring frequent shutdowns for cleaning and reducing operating efficiency. Second, there are no effective preventive measures for easily condensable gases. In low-temperature environments, water vapor in the gas can easily condense into ice or viscous substances on the fiber surface, which not only damages the fiber structure but also significantly reduces the demisting efficiency. Utility Model Content

[0004] (I) Technical Issues

[0005] This invention provides a multi-layer fiber bed demister with droplet pretreatment function and capable of handling easily condensable gases, in order to solve the problems of easy clogging and low demisting efficiency of traditional equipment.

[0006] (II) Technical Content

[0007] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: a multi-layer fiber bed demister, comprising a cylindrical shell, a gas outlet at the top of the shell, a gas inlet and a liquid outlet at the bottom, and a multi-layer fiber bed assembly arranged sequentially from bottom to top inside the shell, the multi-layer fiber bed assembly comprising at least three fiber bed layers, each fiber bed layer being made of fiber material and the fiber density of multiple fiber bed layers gradually increasing from bottom to top; the multi-layer fiber bed assembly being fixed to the inner wall of the shell by a support frame, the support frame being detachably connected to the shell; the gas inlet having an inlet direction tangent to the inner wall of the shell, and an electrically heated insulation layer being applied to the outer wall of the shell.

[0008] Furthermore, the electric heating insulation layer includes a heating coating fixedly disposed on the outer wall of the housing, an electric heating wire fixedly disposed inside the heating coating, a temperature sensor fixedly disposed on the inner wall of the housing, and a PLC controller fixedly disposed on the outside of the housing.

[0009] Furthermore, the fiber material of the fiber bed is one of glass fiber, polypropylene fiber, or metal fiber.

[0010] Furthermore, the support frame includes an annular bracket and a plurality of radial support rods fixed inside the annular bracket. The annular bracket is threadedly connected to the inner wall of the housing, and the radial support rods are used to fix the multi-layer fiber bed assembly.

[0011] Furthermore, an airflow distribution plate for uniformly introducing gas into the fiber bed is fixedly provided on the inner wall of the housing and below the multi-layer fiber bed assembly.

[0012] Furthermore, a liquid collection tank is fixedly provided at the liquid discharge port, and a drain valve is provided at the bottom of the liquid collection tank.

[0013] (III) Technical Effects

[0014] The advantages of this utility model compared with the prior art are as follows:

[0015] 1. The tangential air intake design generates centrifugal force to rotate the gas, which can pre-separate some droplets and reduce the concentration of droplets entering the fiber bed. Combined with a multi-layer bed with gradually increasing fiber density from bottom to top, it can capture droplets of different sizes step by step, significantly reducing the probability of fiber clogging, extending continuous operation time, and ensuring stable demisting efficiency.

[0016] 2. The electric heating insulation layer on the outer wall of the shell, combined with the inner wall temperature sensor and PLC controller, can regulate the shell temperature in real time, effectively preventing easily condensable gases from condensing into ice or viscous substances on the fiber surface, avoiding damage to the fiber structure, and ensuring normal operation of the equipment under low temperature and high humidity conditions.

[0017] 3. The support frame and the shell are detachably connected, making it easy to operate when the fiber bed needs to be replaced or cleaned, reducing downtime and maintenance time and costs. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of a multi-layer fiber bed demister according to this utility model. Figure 1 .

[0019] Figure 2 This is a three-dimensional structural diagram of a multi-layer fiber bed demister according to this utility model. Figure 2 .

[0020] Figure 3 This is a schematic diagram of the main structure of a multi-layer fiber bed demister according to this utility model.

[0021] Figure 4 This is a schematic diagram of the left side of a multi-layer fiber bed demister according to this utility model.

[0022] Figure 5 This is a schematic diagram of the cross-sectional structure of a multi-layer fiber bed demister according to this utility model.

[0023] As shown in the figure: 1. Cylindrical shell; 2. Gas outlet; 3. Gas inlet; 4. Liquid outlet; 5. Multi-layer fiber bed assembly; 6. Support frame; 7. Airflow distribution plate; 8. Liquid collection tank; 10. Drain valve; 11. Electric heating insulation layer; 12. Temperature sensor; 13. PLC controller; 51. Fiber bed; 61. Annular bracket; 62. Radial support rod. Detailed Implementation

[0024] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "center", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation structure and operation. Therefore, they should not be construed as limitations on this utility model.

[0025] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "provided with," "installed," "connected," "linked," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] The present invention will now be described in further detail with reference to the accompanying drawings.

[0027] Combined with appendix Figure 1 To be continued Figure 5 A multi-layer fiber bed demister includes a cylindrical shell 1. The top of the shell 1 has a gas outlet 2, and the bottom has a gas inlet 3 and a liquid outlet 4. Multiple fiber bed assemblies 5 are arranged sequentially from bottom to top inside the shell 1. Each multi-layer fiber bed assembly 5 includes at least three fiber bed layers 51, each made of fiber material, with the fiber density of the multiple fiber bed layers 51 gradually increasing from bottom to top. The multi-layer fiber bed assembly 5 is fixed to the inner wall of the shell 1 by a support frame 6, which is detachably connected to the shell 1. The gas inlet 3 is tangent to the inner wall of the shell 1. An electrically heated insulation layer 11 is applied to the outer wall of the shell 1. The fiber material of the fiber bed layers 51 is one of glass fiber, polypropylene fiber, or metal fiber. An airflow distribution plate 7 is fixedly installed on the inner wall of the shell 1 below the multi-layer fiber bed assembly 5 to ensure uniform gas entry into the fiber bed. A liquid collection tank 8 is fixedly installed at the liquid outlet 4, and a drain valve 10 is installed at the bottom of the liquid collection tank 8.

[0028] The working principle of this utility model is as follows: gas enters the cylindrical shell 1 through the tangentially set gas inlet 3. Using the rotational centrifugal force generated by the tangential air intake, some large-diameter droplets are thrown towards the inner wall of the shell in advance, forming a liquid film and flowing down the wall surface. Then, the gas is evenly dispersed by the airflow distribution plate 7 and enters the multi-layer fiber bed assembly 5 fixed by the support frame 6. The fiber bed layer 51 in the assembly has a gradually increasing fiber density from bottom to top. Through interception, inertial collision and other actions, it captures droplets of different sizes step by step. At the same time, the electric heating insulation layer 11 on the outer wall of the shell 1 controls the temperature in real time to prevent easily condensable gas from condensing on the fiber surface. Finally, the purified gas is discharged from the gas outlet 2, and the captured droplets are collected in the liquid collection tank 8 and discharged through the bottom drain valve 10.

[0029] In this embodiment, as a preferred technical solution, the electric heating insulation layer 11 includes a heating coating fixedly disposed on the outer wall of the housing 1, an electric heating wire fixedly disposed inside the heating coating, a temperature sensor 12 fixedly disposed on the inner wall of the housing 1, and a PLC controller 13 fixedly disposed on the outside of the housing 1.

[0030] In this embodiment, as a preferred technical solution, the support frame 6 includes an annular bracket 61 and a plurality of radial support rods 62 fixed inside the annular bracket 61. The annular bracket 61 is threadedly connected to the inner wall of the housing 1, and the radial support rods 62 are used to fix the multi-layer fiber bed assembly 5.

[0031] The working process of this utility model is as follows:

[0032] 1. The gas to be treated enters the cylindrical shell 1 through the gas inlet 3. A centrifugal force is generated inside the shell, and large-diameter droplets are thrown towards the inner wall of the shell to form a liquid film, which then flows downward along the wall.

[0033] 2. The pretreated gas flows through the inner wall of the shell 1 and the airflow distribution plate 7 below the multi-layer fiber bed assembly 5, and is evenly dispersed before flowing upward.

[0034] 3. The uniformly dispersed gas enters the multi-layer fiber bed assembly 5 and passes through the fiber bed 51 with gradually increasing fiber density from bottom to top. Droplets of different sizes are captured by each level of the fiber bed.

[0035] 4. During the defogging process, the temperature sensor 12 monitors the temperature inside the housing 1 in real time and transmits the signal to the PLC controller 13. The controller controls the operation of the electric heating wire of the electric heating insulation layer 11 to maintain a suitable temperature inside the housing and prevent fog droplets from condensing into ice or viscous substances on the surface of the fiber bed 51.

[0036] 5. The purified gas is discharged from the gas outlet 2 at the top of the shell 1; the droplets captured by the fiber bed 51 and the liquid film on the inner wall are collected in the liquid collection tank 8 at the liquid discharge port 4. The drain valve 10 at the bottom of the liquid collection tank 8 is opened to discharge the liquid from the equipment.

[0037] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A multi-layer fiber bed demister, comprising a cylindrical shell (1), wherein the top of the shell (1) is provided with a gas outlet (2), and the bottom is provided with a gas inlet (3) and a liquid outlet (4), characterized in that: The shell (1) is provided with a multi-layer fiber bed assembly (5) arranged from bottom to top. The multi-layer fiber bed assembly (5) includes at least three fiber bed layers (51). Each fiber bed layer (51) is made of fiber material and the fiber density of the multiple fiber bed layers (51) gradually increases from bottom to top. The multi-layer fiber bed assembly (5) is fixed to the inner wall of the shell (1) by a support frame (6), and the support frame (6) is detachably connected to the shell (1); the gas inlet (3) is tangent to the inner wall of the shell (1), and the outer wall of the shell (1) is covered with an electric heating insulation layer (11).

2. A multi-bed mist eliminator according to claim 1, characterized in that: The electric heating insulation layer (11) includes a heating coating fixedly disposed on the outer wall of the housing (1), an electric heating wire fixedly disposed inside the heating coating, a temperature sensor (12) fixedly disposed on the inner wall of the housing (1), and a PLC controller (13) fixedly disposed on the outside of the housing (1).

3. A multi-layer fiber bed demister according to claim 1, characterized in that: The fiber material of the fiber bed (51) is one of glass fiber, polypropylene fiber or metal fiber.

4. A multi-layer fiber bed demister according to claim 1, characterized in that: The support frame (6) includes an annular bracket (61) and a plurality of radial support rods (62) fixed inside the annular bracket (61). The annular bracket (61) is threaded to the inner wall of the housing (1), and the radial support rods (62) are used to fix the multi-layer fiber bed assembly (5).

5. A multi-layer fiber bed demister according to claim 1, characterized in that: An airflow distribution plate (7) for uniformly introducing gas into the fiber bed is fixedly provided on the inner wall of the housing (1) and below the multi-layer fiber bed assembly (5).

6. A multi-layer fiber bed demister according to claim 1, characterized in that: A liquid collection tank (8) is fixedly provided at the liquid discharge port (4), and a drain valve (10) is provided at the bottom of the liquid collection tank (8).

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