A gas-liquid defoaming cyclone separator

Abstract

This invention discloses a gas-liquid defoaming cyclone separator, relating to the technical field of gas-liquid separation equipment. It includes a separator body, a defoamer, an exhaust port, and a drain port. An air inlet is located at the top of the separator body to allow airflow to enter tangentially. The defoamer is cylindrical and coaxially mounted on the top of the separator body, with the defoamer spaced apart from the sidewalls of the separator body. The exhaust port is located at the top of the separator body and vertically aligned with the defoamer. The drain port is located at the bottom of the separator body. Through the cooperation of the separator body and the defoamer, the foam is forcibly stretched and broken under strong centrifugal and shear forces, releasing the liquid within the foam. The defoamed gas below the defoamer can completely separate the tiny droplets from the gas phase through centrifugal force, achieving the technical effect of efficiently breaking up fine foam and deeply removing small-diameter droplets.

Description

Technical Field

[0001] This invention relates to the field of gas-liquid separation equipment technology, and in particular to a gas-liquid defoaming cyclone separator. Background Technology

[0002] Chlorinated paraffin-52 is an important chemical auxiliary raw material widely used in the industrial field. Its continuous industrial production equipment is mainly divided into two categories: glass-lined tower chlorination reactors and glass-lined kettle chlorination reactors. In the continuous chlorination production process of chlorinated paraffin-52, a large amount of hydrogen chloride tail gas is continuously generated in the reactor. This hydrogen chloride gas flow easily carries fine foam and suspended droplets formed by n-alkane chlorides. In order to avoid material loss, corrosion of downstream equipment, and decline in the purification quality of by-products, this tail gas must be pre-treated by a special gas-liquid separation device to remove liquid phase impurities.

[0003] Currently, conventional cyclone separators are mostly used in industrial sites to complete gas-liquid separation operations under this condition. However, due to the inherent structure of the equipment and the principle of centrifugal separation, existing cyclone separators are insufficient in their ability to capture fine foam and small-diameter droplets in the hydrogen chloride gas flow, resulting in poor overall gas-liquid separation effect. After separation and purification, a large number of suspended droplets remain inside the hydrogen chloride tail gas. If the substandard tail gas enters the downstream process, it will easily cause pipeline blockage and equipment corrosion in the subsequent hydrogen chloride purification equipment, significantly increasing the processing load of the subsequent process and the production and maintenance costs of the enterprise.

[0004] Therefore, there is an urgent need for a gas-liquid defoaming cyclone separator that can efficiently break up micro foams and deeply remove small-diameter droplets. Summary of the Invention

[0005] The purpose of this invention is to provide a gas-liquid defoaming cyclone separator to solve the problems existing in the prior art. By setting a defoamer inside the separator body and setting the exhaust port at the top of the separator body and corresponding to the defoamer, the gas-liquid separation efficiency is enhanced and the content of fine mist droplets entrained in the exhaust gas is reduced.

[0006] To achieve the above objectives, the present invention provides the following solution: This invention provides a gas-liquid defoaming cyclone separator, comprising: a separator body, a defoamer, an exhaust port, and a drain port; wherein, an air inlet is provided at the upper part of the separator body, the axis of the air inlet being spaced apart from the axis of the separator body, so that airflow enters the separator body tangentially; the defoamer is cylindrical and coaxially mounted on the top of the separator body, the defoamer being spaced apart from the side wall of the separator body, the defoamer being vertically aligned with the air inlet; the exhaust port is located at the top of the separator body, and the exhaust port is vertically aligned with the defoamer; the drain port is located at the bottom of the separator body.

[0007] Preferably, the lower end of the demister is provided with a guide portion, which extends from the side wall of the demister toward the side wall of the separator body.

[0008] Preferably, the angle between the guide portion and the side wall of the demister is 10°-20°.

[0009] Preferably, the guide portion is a guide tooth, the root of the guide tooth is connected to the demister, and the tip of the guide tooth extends toward the side wall of the separator body.

[0010] Preferably, it further includes vortex anchor plates, which are spaced apart above the drain port, and there is a gap between the vortex anchor plates and the separator body to allow liquid to flow downward.

[0011] Preferably, it further includes a baffle plate, the lower end of which is connected to the separator body, the upper end of which extends along the axis of the separator body, and the upper end of which is connected to the vortex anchoring plate.

[0012] Preferably, it also includes an anti-snail device, which is installed at the drain port.

[0013] Preferably, it also includes an observation window, which is located on the lower part of the side wall of the separator body.

[0014] Preferably, it further includes a pressure measuring port, which is located at the top of the separator body and between the demister and the side wall of the separator body.

[0015] Preferably, it further includes a temperature measuring port, which is located at the top of the separator body and between the demister and the side wall of the separator body.

[0016] The present invention achieves the following technical effects compared to the prior art: In the gas-liquid defoaming cyclone separator disclosed in this invention, the combination of the separator body and the defoamer enables the mixed gas to rotate at high speed around the defoamer, so that the foam is forcibly stretched and broken under the action of strong centrifugal force and shear force, and the liquid in the foam is released. The gas after defoaming will also move towards the inner wall of the separator body under the action of centrifugal force, forming a low-pressure zone in the central area of ​​the separator body. The gas converges towards the central low-pressure zone under the action of pressure difference and enters the defoamer upward, and finally exits through the exhaust port. The gas after defoaming can still rotate rapidly after moving below the defoamer, that is, it can completely separate the tiny droplets from the gas phase through centrifugal force, and achieve the technical effect of efficiently breaking up micro foam and deeply removing small-diameter droplets. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a gas-liquid defoaming cyclone separator in one embodiment of the present invention; Figure 2 for Figure 1 A semi-perspective top view diagram.

[0019] The components include: 1. Separator body; 2. Air inlet; 3. Defoamer; 4. Exhaust port; 5. Liquid drain port; 6. Guide section; 7. Vortex anchor plate; 8. Isolation plate; 9. Anti-slip device; 10. Observation window; 11. Pressure measuring port; 12. Temperature measuring port; 13. Mixed gas inlet pipe; 14. Dry gas outlet pipe; and 15. Equipment support legs. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] The purpose of this invention is to provide a gas-liquid defoaming cyclone separator to solve the problems existing in the prior art. By setting a defoamer inside the separator body and setting the exhaust port at the top of the separator body and corresponding to the defoamer, the gas-liquid separation efficiency is enhanced and the content of fine mist droplets entrained in the exhaust gas is reduced.

[0022] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Please refer to Figures 1-2This embodiment provides a gas-liquid defoaming cyclone separator, including: a separator body 1, a defoamer 3, an exhaust port 4, and a liquid discharge port 5; wherein, an air inlet 2 is provided on the upper part of the separator body 1, and the axis of the air inlet 2 is spaced apart from the axis of the separator body 1 so that the airflow enters the separator body 1 tangentially; the defoamer 3 is cylindrical and coaxially installed on the top of the separator body 1, and the defoamer 3 is spaced apart from the side wall of the separator body 1; the defoamer 3 is vertically aligned with the air inlet 2; the exhaust port 4 is located on the top of the separator body 1 and is vertically aligned with the defoamer 3; and the liquid discharge port 5 is located at the bottom of the separator body 1. During operation, the foam-containing gas mixture enters the separator body 1 tangentially through inlet 2. Under centrifugal force, the gas mixture rotates at high speed around the breaker 3 in the annular space between the separator body 1 and the breaker 3. During this process, the foam is forcibly stretched and broken under strong centrifugal and shear forces, releasing the liquid within the foam. Under the influence of gravity and the pressure of inlet 2, the defoamed gas, carrying tiny droplets, moves downwards to a position below the breaker 3. Under inertia, the gas continues to... The micro-droplets rotate at high speed within the separator body 1. Under centrifugal force, they are thrown towards the inner wall of the separator body 1 and eventually converge into a liquid film under gravity, flowing downwards and exiting through the drain port 5. Meanwhile, the defoamed gas also moves towards the inner wall of the separator body 1 under centrifugal force, forming a low-pressure zone in the central area. Under pressure difference, the gas converges towards this central low-pressure zone and enters the defoamer 3, finally exiting through the exhaust port 4, thus achieving efficient gas-liquid separation. In this embodiment, the separator body 1 is divided into a defoaming zone and a separation zone from top to bottom. The part corresponding to the defoamer 3 is the defoaming zone, and the part below the defoamer 3 is the separation zone. The two work together, first breaking the foam structure in the defoaming zone through centrifugal force and shear force, and then completely separating the micro-droplets from the gas phase through centrifugation in the separation zone. This significantly improves the gas-liquid separation efficiency and achieves the technical effect of efficiently breaking down fine foam and deeply removing small-diameter droplets.

[0024] In one embodiment, the top of the demister 3 is sealed to the top of the separator body 1. This arrangement prevents gas from escaping directly from the top without passing through the demister zone, ensuring that all airflow must pass through the separation zone before entering the exhaust port 4, thereby further improving the separation effect.

[0025] In one embodiment, a guide portion 6 is provided at the lower end of the demister 3, extending from the side wall of the demister 3 towards the side wall of the separator body 1. Since the air inlet 2 continuously supplies mixed gas, the space between the separator body 1 and the demister 3 is filled with gas. That is, there is also gas or liquid near the inner wall of the demister 3. By providing the guide portion 6, a guiding effect can be provided for the gas or liquid that is rotating at high speed and moving downwards. This allows the gas or liquid in contact with the guide portion 6 to obtain a radial velocity component toward the inner wall of the separator body 1 when entering the separation zone. This not only optimizes the airflow trajectory but also achieves active control of gas flow in terms of physical structure, thereby enhancing the centrifugal separation effect.

[0026] In one embodiment, the angle between the guide portion 6 and the side wall of the demister 3 is 10°-20°.

[0027] Preferably, the angle between the guide portion 6 and the side wall of the demister 3 is 15°.

[0028] In one embodiment, the guide portion 6 is a guide tooth, the root of which is connected to the defoamer 3, and the tip of which extends toward the side wall of the separator body 1. The toothed structure can break up unbroken foam through physical cutting, improving defoaming efficiency and enhancing centrifugal separation effect.

[0029] In one embodiment, the gas-liquid defoaming cyclone separator further includes vortex anchor plates 7, which are spaced apart above the drain port 5. A gap exists between the vortex anchor plates 7 and the separator body 1 to allow liquid to flow downwards. A drain zone is formed between the vortex anchor plates 7 and the bottom of the separator body 1. Liquid accumulated on the inner wall of the separator body 1 flows down the wall under gravity, through the gap to the drain zone, and is finally discharged from the drain port 5. The vortex anchor plates 7 separate the drain zone from the upper separation zone, preventing airflow disturbances from interfering with the drain process and causing liquid surface disturbances. This ensures that the liquid can be smoothly and steadily collected and discharged, further improving the drain efficiency and the overall stability of the separation system.

[0030] In one embodiment, the gas-liquid defoaming cyclone separator further includes a baffle plate 8. The lower end of the baffle plate 8 is connected to the separator body 1, and the upper end of the baffle plate 8 extends along the axis of the separator body 1. The upper end of the baffle plate 8 is connected to the vortex anchoring plate 7. The inclined baffle plate 8 can prevent airflow from entering the drainage area from the side of the vortex anchoring plate 7 while avoiding compression of the gas flow space, that is, reducing interference with gas flow. Thus, while maintaining efficient separation, it further ensures the independence and stability of the drainage process.

[0031] In one embodiment, multiple partition plates 8 are spaced apart or have openings in them so that liquid can flow downward through the partition plates 8.

[0032] In one embodiment, the gas-liquid defoaming cyclone separator further includes an anti-vortex device 9, which is installed at the drain port 5. The anti-vortex device 9 can effectively prevent the formation of vortices at the drain port 5 due to liquid rotation, and avoid gas being drawn into the drain pipe, thereby ensuring the continuity of the draining process and the thoroughness of gas-liquid separation.

[0033] In one embodiment, the gas-liquid defoaming cyclone separator further includes an observation window 10, which is located on the lower part of the side wall of the separator body 1. Through the observation window 10, a stable swirling state and uniform liquid film flow can be clearly observed, facilitating operators to monitor the internal operation of the separator in real time, promptly detect abnormalities, and adjust process parameters, thereby improving the convenience and reliability of equipment operation and maintenance.

[0034] In one embodiment, the observation window 10 is made of quartz glass, which has excellent high temperature resistance, corrosion resistance and pressure resistance, and can withstand the long-term test of complex working conditions inside the separator.

[0035] In one embodiment, the gas-liquid defoaming cyclone separator further includes a pressure measuring port 11, which is located at the top of the separator body 1 and between the defoamer 3 and the side wall of the separator body 1. The pressure measuring port 11 is used to connect a pressure sensor or pressure gauge to monitor the pressure changes inside the separator in real time, thereby providing operators with key pressure data to facilitate timely adjustment of the air intake flow rate or separator operating parameters, ensuring that the separation process is always under optimal operating conditions.

[0036] In one embodiment, the gas-liquid defoaming cyclone separator further includes a temperature measuring port 12, which is located at the top of the separator body 1 and between the defoamer 3 and the side wall of the separator body 1. The temperature measuring port 12 is used to connect a temperature sensor or thermometer to monitor the temperature changes inside the separator in real time, providing operators with crucial temperature data.

[0037] In one embodiment, the exhaust port 4 is coaxially arranged with the separator body 1.

[0038] In one embodiment, an exhaust pipe is installed on the lower side of the exhaust port 4. The exhaust pipe is coaxially arranged with the demister 3. The upper end of the exhaust pipe is connected to the exhaust port 4, and the lower end of the exhaust port 4 extends downward and does not exceed the demister 3. This allows a stable gas flow field to be formed in the demister 3, avoiding interference between the gas that has just entered the demister 3 and the gas that is about to be discharged.

[0039] In one embodiment, a dry gas outlet pipe 14 is coaxially mounted on the upper side of the exhaust port 4.

[0040] In one embodiment, the diameter of the dry gas outlet pipe 14 is 80mm-125mm.

[0041] In one embodiment, the diameter of the drain port 5 is 50 mm.

[0042] In one embodiment, the gas discharged through the outlet is tested to have the following characteristics: droplet diameter ≤ 20 μm, liquid content ≤ 18 ppm, 20 μm droplet separation efficiency 95.5%, and equipment pressure drop 0.01 bar.

[0043] In one embodiment, the separator body 1 has a diameter of Φ600mm-1000mm and a length of 2000mm-3000mm; the tangential velocity of the gas inside the cylinder is ≥15.5 m / s, resulting in a centrifugal acceleration of 18G-30G.

[0044] In one embodiment, a mixed gas inlet pipe 13 is coaxially mounted on the outside of the air inlet 2.

[0045] In one embodiment, the diameter of the mixed gas inlet pipe 13 is 80mm-100mm, and the inlet velocity is 19.6m / s.

[0046] In one embodiment, the gas-liquid defoaming cyclone separator is suitable for processing a total hydrogen chloride gas volume of 20 Nm³. 3 / h-140Nm 3 Operating conditions per hour.

[0047] In one embodiment, the gas rotates at a speed of 4 revolutions per second in the separation zone, generating a centrifugal acceleration of approximately 24G.

[0048] In one embodiment, a device support leg 15 is provided below the separator body 1.

[0049] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A gas-liquid defoaming cyclone separator, characterized in that, include: A separator body (1) is provided with an air inlet (2) at its upper part. The axis of the air inlet (2) is spaced apart from the axis of the separator body (1) so that the airflow enters the separator body (1) tangentially. The breaker (3) is cylindrical and coaxially mounted on the top of the separator body (1). The breaker (3) is spaced apart from the side wall of the separator body (1). The breaker (3) is arranged in a vertical direction corresponding to the air inlet (2). The exhaust port (4) is located at the top of the separator body (1) and is arranged vertically in correspondence with the breaker (3); The drain port (5) is located at the bottom of the separator body (1); the lower end of the demister (3) is provided with a guide part (6), which extends from the side wall of the demister (3) to the side wall of the separator body (1); the guide part (6) is a guide tooth, the root of the guide tooth is connected to the demister (3), and the tip of the guide tooth extends towards the side wall of the separator body (1).

2. The gas-liquid defoaming cyclone separator according to claim 1, characterized in that, The angle between the guide part (6) and the side wall of the demister (3) is 10°-20°.

3. The gas-liquid defoaming cyclone separator according to claim 1, characterized in that, It also includes a vortex anchor plate (7), which is spaced apart on the upper side of the drain port (5), and there is a gap between the vortex anchor plate (7) and the separator body (1) for the liquid to flow downward.

4. The gas-liquid defoaming cyclone separator according to claim 3, characterized in that, It also includes a partition plate (8), the lower end of which is connected to the separator body (1), the upper end of which extends toward the axis of the separator body (1), and the upper end of which is connected to the vortex anchor plate (7).

5. The gas-liquid defoaming cyclone separator according to claim 3, characterized in that, It also includes a snail guard (9), which is installed at the drain port (5).

6. The gas-liquid defoaming cyclone separator according to claim 1, characterized in that, It also includes an observation window (10), which is located on the lower part of the side wall of the separator body (1).

7. The gas-liquid defoaming cyclone separator according to claim 1, characterized in that, It also includes a pressure measuring port (11), which is located at the top of the separator body (1) and between the demister (3) and the side wall of the separator body (1).

8. The gas-liquid defoaming cyclone separator according to claim 1, characterized in that, It also includes a temperature measuring port (12), which is located at the top of the separator body (1) and between the demister (3) and the side wall of the separator body (1).

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