Exhaust gas collecting device for liquid chemical pipeline

Abstract

The utility model relates to an exhaust gas collecting device for a liquid chemical pipeline, which belongs to the technical field of gas-liquid separation, and comprises a shell, a liquid discharge pipe, a first gas pipe and a second gas pipe are arranged on the shell, a separation drum is arranged in the shell, the separation drum is vertically arranged, and the liquid discharge pipe is communicated with the first gas pipe. The separation rotary drum is driven by a driving part to rotate around the axis of the separation rotary drum, the separation rotary drum and the first air pipe rotate and are in sealed connection, and an auxiliary mechanism is arranged on the separation rotary drum; in the gas-liquid separation process, fog drops formed by liquid are adsorbed through the demisting net, along with the increase of the volume of the adsorbed fog drops, the fog drops on the demisting net are separated from the demisting net under the action of centrifugal force and are discharged from the liquid outlet, the discharged fog drops collide with the inner wall of the shell, and the fog drops are separated from the inner wall of the shell. And the tail gas flows downwards along the inner wall of the shell and is finally discharged from the liquid discharge pipe, so that the content of liquid in the tail gas discharged from the shell is reduced, and the gas-liquid separation effect is improved.

Description

Technical Field

[0001] This utility model relates to an exhaust collection device for liquid chemical pipelines, belonging to the field of gas-liquid separation technology. Background Technology

[0002] There are four main methods for handling liquid chemicals: tanker truck entry, tanker truck exit, ship entry, and ship exit. During ship entry and exit, liquid chemicals are transported via metal pipelines. After transport, all materials must be purged into storage tanks or ship holds using pressurized nitrogen. Therefore, after pipeline cleaning, the pipeline must be vented before dismantling can proceed. During venting, a small amount of liquid material and VOCs (volatile organic compounds) escape along with the pressurized gas. VOCs containing these materials entering the air can cause fires and explosions, posing significant safety hazards and polluting the atmosphere, potentially leading to poisoning accidents. Therefore, a gas-liquid separation device is needed to separate the residual liquid material and VOCs from the exhaust gas from the liquid chemical pipeline. The separated residual liquid material is recovered, while the separated VOCs are treated by a waste gas treatment device.

[0003] Utility model patent CN220656776U discloses a gas-liquid separator for a VOCs waste gas treatment system, comprising an outer cylinder, a separator, and an inlet. The outer cylinder is hollow, and the inlet is fixed to the upper end of the outer cylinder. Gas enters the outer cylinder through the inlet and rotates spirally. The separator is fixed within the outer cylinder and is adapted to guide the gas to rotate spirally within the outer cylinder, separating moisture from the gas. The separator increases the spiral rotation speed of the airflow within the outer cylinder, improving gas-liquid separation efficiency and preventing moisture in the flue gas from entering the incinerator. However, when used in the exhaust collection of liquid chemical pipelines, the existing technology suffers from air pressure within the gas-liquid separator, causing some liquid to atomize. Gas-liquid separation is achieved solely through the rotation of the separator, leaving atomized liquid residue in the air discharged from the separator, thus affecting the separation effect.

[0004] Therefore, there is a need for an exhaust collection device for liquid chemical pipelines to improve gas-liquid separation efficiency. Summary of the Invention

[0005] The technical problem to be solved by this utility model is: in order to overcome the shortcomings of the prior art, to provide an exhaust gas collection device for liquid chemical pipelines that improves the gas-liquid separation effect.

[0006] The technical solution adopted by this utility model to solve the above problems is as follows: an exhaust collection device for liquid chemical pipelines, including a housing, on which a drain pipe, a first gas pipe and a second gas pipe are provided, and a separation rotating cylinder is provided inside the housing. The separation rotating cylinder is arranged vertically and is driven to rotate around its own axis by a driving component. The separation rotating cylinder is rotated and sealed to the first gas pipe. An auxiliary mechanism is provided on the separation rotating cylinder.

[0007] The auxiliary mechanism includes a rotating plate and a demisting screen. The rotating plate is fixedly installed on the outer wall of the separating rotating cylinder. One side of the rotating plate is recessed to form a placement cavity. The demisting screen is installed in the placement cavity. A drain port is provided on the side of the placement cavity away from the separating rotating cylinder. A through hole is provided on the rotating plate, and the through hole communicates with the placement cavity.

[0008] Preferably, the separating drum includes a drum body and a connecting pipe, the connecting pipe being coaxially disposed on the drum body, the connecting pipe being rotatably and sealingly connected to the first air pipe, the drum body having an opening, and the rotating plate being disposed on the drum body.

[0009] Preferably, multiple openings are provided, and the multiple openings are distributed circumferentially around the axis of the cylinder.

[0010] Preferably, multiple auxiliary mechanisms are provided, and the multiple auxiliary mechanisms and multiple openings are arranged alternately.

[0011] Preferably, a support member is provided inside the housing to support the separating drum.

[0012] Preferably, the support includes a support block and a ball bearing, the ball bearing being embedded in the support block and in a rolling connection with the support block, and the ball bearing abutting against the bottom of the separating drum.

[0013] Preferably, a limiting member is provided inside the housing, which is used to achieve circumferential positioning of the separating drum.

[0014] Preferably, the limiting member includes at least three limiting wheels, which are circumferentially distributed around the axis of the separating drum, and the limiting wheels abut against the outer wall of the separating drum.

[0015] Preferably, the limiting member is provided in two sets, and the two sets of limiting members are distributed along the axis of the separating drum.

[0016] Preferably, the demisting mesh abuts against the inner wall of the placement chamber on the side away from the separating rotating cylinder.

[0017] Compared with the prior art, the advantages of this utility model are:

[0018] This utility model discloses an exhaust gas collection device for liquid chemical pipelines. During the gas-liquid separation process, the device adsorbs liquid droplets through a demister. As the volume of the adsorbed droplets increases, the droplets on the demister separate from the demister under centrifugal force and are discharged from the drain port. The discharged droplets collide with the inner wall of the shell and flow downwards along the inner wall, eventually being discharged from the drain pipe. This reduces the liquid content in the exhaust gas discharged from the shell, improving the gas-liquid separation effect. In addition, the automatic separation of droplets from the demister under centrifugal force facilitates the improvement of the demister's droplet adsorption capacity, thereby further enhancing the gas-liquid separation effect. Attached Figure Description

[0019] Figure 1 This is a perspective view of an exhaust collection device for liquid chemical pipelines according to the present invention;

[0020] Figure 2 This is a front view of an exhaust collection device for liquid chemical pipelines according to the present invention.

[0021] Figure 3 This is a top view of an exhaust collection device for liquid chemical pipelines according to the present invention;

[0022] Figure 4 This is a left view of an exhaust collection device for liquid chemical pipelines according to the present invention.

[0023] Figure 5 This is a cross-sectional view of an exhaust collection device for liquid chemical pipelines according to the present invention;

[0024] Figure 6 A three-dimensional view of the connection structure between the rotating drum and the auxiliary mechanism;

[0025] Figure 7 A sectional view of the connection structure between the rotating drum and the auxiliary mechanism;

[0026] Figure 8 Exploded view of the auxiliary mechanism;

[0027] Figure 9 This is a cross-sectional view of the rotating plate;

[0028] Figure 10 This is a sectional view of the support component.

[0029] in:

[0030] 1. Housing; 2. Drain pipe; 3. First air pipe; 4. Second air pipe; 5. Separating drum; 6. Driving component; 7. Auxiliary mechanism; 8. Support component; 9. Limiting component.

[0031] Cylinder 51, connecting pipe 52, opening 53;

[0032] Rotating plate 71, demister screen 72, placement chamber 73, drain port 74, through hole 75;

[0033] Support block 81, ball bearing 82;

[0034] Limit wheel 91. Detailed Implementation

[0035] like Figure 1-10 As shown, an exhaust collection device for a liquid chemical pipeline in this embodiment includes a housing 1. The housing 1 is provided with a drain pipe 2, a first gas pipe 3, and a second gas pipe 4. The first gas pipe 3 and the second gas pipe 4 are both vertically arranged at the top of the housing 1. The discharge pipe is arranged at the bottom of the housing 1. A separation rotating cylinder 5 is arranged vertically inside the housing 1. The separation rotating cylinder 5 is driven to rotate around its own axis by a driving component 6, wherein the driving component 6 can be a motor. The separation rotating cylinder 5 is rotatably and sealedly connected to the first gas pipe 3. The separation rotating cylinder 5 is provided with multiple auxiliary mechanisms 7, which are evenly distributed circumferentially around the axis of the separation rotating cylinder 5.

[0036] The auxiliary mechanism 7 includes a rotating plate 71 and a demisting screen 72. The rotating plate 71 is fixedly installed on the outer wall of the separating rotating cylinder 5. The top of the rotating plate 71 is recessed to form a placement cavity 73. The demisting screen 72 is installed in the placement cavity 73. A drain port 74 is provided on the side of the placement cavity 73 away from the separating rotating cylinder 5. The demisting screen 72 abuts against the inner wall of the side of the placement cavity 73 away from the separating rotating cylinder 5. The rotating plate 71 is provided with a plurality of through holes 75, which are arranged in a matrix. The through holes 75 communicate with the placement cavity 73.

[0037] After the pipeline cleaning is completed, the pipeline is connected to the first air pipe 3. Pressurized exhaust gas is delivered from the first air pipe 3 to the separating drum 5. The motor is started, causing the separating drum 5 to rotate, which in turn drives the exhaust gas to rotate inside the separating drum 5. The rotation of the exhaust gas causes the liquid to separate from the gas under the action of centrifugal force. The separated liquid passes through the separating drum 5 and collides with the inner wall of the shell 1, flowing downwards along the inner wall of the shell 1 and finally being discharged from the drain pipe 2. The exhaust gas containing the separated liquid in the separating drum 5 passes through the separating drum 5 and is discharged from the second air pipe 4. In addition, the rotation of the separating drum 5... The rotating plate 71 is driven to rotate synchronously. The rotation of the rotating plate 71 can increase the speed of the exhaust gas, thereby increasing the centrifugal force on the liquid in the exhaust gas and improving the gas-liquid separation effect. Moreover, as the rotating plate 71 rotates, the exhaust gas enters the placement chamber 73 through the through hole 75 and is adsorbed by the demister 72 to form mist droplets. When the size of the mist droplets increases, they separate from the demister 72 under the action of centrifugal force and are discharged from the drain port 74. The mist droplets collide with the inner wall of the housing 1 and flow downward along the inner wall of the housing 1, and are finally discharged from the drain pipe 2.

[0038] Of course, the pipeline can also be connected to the second air pipe 4. After the pressurized exhaust gas is delivered to the housing 1 through the second air pipe 4, the motor starts, causing the separating drum 5 to rotate. The rotation of the separating drum 5 drives the rotating plate 71 to rotate synchronously, thereby realizing the rotation of the exhaust gas inside the housing 1. This causes the liquid in the exhaust gas to separate from the gas under the action of centrifugal force. The separated liquid collides with the inner wall of the housing 1 and flows downward along the inner wall of the housing 1, and is finally discharged from the drain pipe 2. In addition, the rotation of the rotating plate 71 can increase the rotation speed of the exhaust gas, thereby improving... The centrifugal force on the liquid in the exhaust gas enhances the gas-liquid separation effect. Moreover, as the rotating plate 71 rotates, the exhaust gas enters the placement chamber 73 through the through hole 75 and passes through the demister 72 to adsorb the liquid droplets formed in the exhaust gas. As the droplet volume increases, it separates from the demister 72 under the action of centrifugal force and is discharged from the drain port 74. The droplets collide with the inner wall of the housing 1 and flow downward along the inner wall of the housing 1, and are finally discharged from the drain pipe 2. The exhaust gas after liquid separation passes through the separation rotating cylinder 5 and is discharged from the first gas pipe 3.

[0039] Here, as the volume of the mist droplets increases, they separate from the demister 72 under the action of centrifugal force, realizing the automatic separation of the mist droplets from the demister 72, which facilitates the improvement of the demister 72's ability to adsorb mist droplets;

[0040] The separating rotating drum 5 includes a drum body 51 and a connecting pipe 52. The connecting pipe 52 is coaxially arranged on the top of the drum body 51. The connecting pipe 52 is rotatably and sealedly connected to the first air pipe 3. The drum body 51 is provided with multiple openings 53, which are evenly distributed circumferentially around the axis of the drum body 51. The rotating plate 71 is arranged on the drum body 51. The multiple openings 53 and the multiple rotating plates 71 are arranged alternately. During operation, the motor is started, causing the drum body 51 to rotate. The rotation of the drum body 51 drives the connecting pipe 52 and the rotating plate 71 to rotate synchronously. As the drum body 51 rotates, the exhaust gas passes through the openings 53.

[0041] The housing 1 is provided with three support members 8, which are evenly distributed circumferentially around the axis of the separating rotating cylinder 5. The support members 8 are used to support the separating rotating cylinder 5. Each support member 8 includes a support block 81 and a ball bearing 82. The ball bearing 82 is embedded in the support block 81 and is in a rolling connection with the support block 81. The ball bearing 82 abuts against the bottom of the separating rotating cylinder 5. During the rotation of the separating rotating cylinder 5, the ball bearing 82 supports the rotating cylinder and simultaneously drives the ball bearing 82 to roll on the support block 81.

[0042] The housing 1 is provided with a limiting member 9, which is used to achieve circumferential positioning of the separating rotating cylinder 5. The limiting member 9 includes three limiting wheels 91, which are evenly distributed circumferentially around the axis of the separating rotating cylinder 5. The limiting wheels 91 abut against the outer wall of the separating rotating cylinder 5. The limiting wheels 91 prevent the separating rotating cylinder 5 from shifting horizontally, thereby improving the stability of the rotation of the separating rotating cylinder 5.

[0043] The rotating plate 71

[0044] Two sets of limiting members 9 are provided, and the two sets of limiting members 9 are distributed along the axial direction of the separating rotating drum 5.

[0045] In summary, during the gas-liquid separation process, the mist droplets formed by the liquid are adsorbed by the demister 72. As the volume of the adsorbed mist droplets increases, the droplets on the demister 72 separate from the demister 72 under the action of centrifugal force and are discharged from the drain port 74. The discharged droplets collide with the inner wall of the shell 1 and flow downward along the inner wall of the shell 1, and are finally discharged from the drain pipe 2. This reduces the liquid content in the exhaust gas discharged from the shell 1 and improves the gas-liquid separation effect. In addition, the separation of the droplets from the demister 72 under the action of centrifugal force realizes the automatic separation of the droplets from the demister 72, which facilitates the improvement of the adsorption capacity of the demister 72 for mist droplets, thereby further improving the gas-liquid separation effect.

[0046] In addition to the above embodiments, this utility model also includes other implementation methods. All technical solutions formed by equivalent transformation or equivalent substitution should fall within the protection scope of the claims of this utility model.

Claims

1. An exhaust collection device for a liquid chemical pipeline, comprising a housing (1), wherein a drain pipe (2), a first gas pipe (3), and a second gas pipe (4) are disposed on the housing (1), and a separating rotating cylinder (5) is disposed inside the housing (1), the separating rotating cylinder (5) being arranged vertically, the separating rotating cylinder (5) being driven to rotate around its own axis by a driving member (6), the separating rotating cylinder (5) being rotatably and sealingly connected to the first gas pipe (3), characterized in that: An auxiliary mechanism (7) is provided on the separating drum (5); The auxiliary mechanism (7) includes a rotating plate (71) and a demisting screen (72). The rotating plate (71) is fixedly installed on the outer wall of the separating rotating cylinder (5). One side of the rotating plate (71) is recessed to form a placement cavity (73). The demisting screen (72) is installed in the placement cavity (73). A drain port (74) is provided on the side of the placement cavity (73) away from the separating rotating cylinder (5). A through hole (75) is provided on the rotating plate (71), and the through hole (75) communicates with the placement cavity (73).

2. The exhaust gas collection device for liquid chemical pipelines according to claim 1, characterized in that: The separating rotating drum (5) includes a drum body (51) and a connecting pipe (52). The connecting pipe (52) is coaxially arranged on the drum body (51). The connecting pipe (52) is rotatably and sealedly connected to the first air pipe (3). An opening (53) is provided on the drum body (51). The rotating plate (71) is arranged on the drum body (51).

3. The exhaust gas collection device for liquid chemical pipelines according to claim 2, characterized in that: The opening (53) is provided in multiple ways, and the multiple openings (53) are distributed circumferentially around the axis of the cylinder (51).

4. The exhaust gas collection device for liquid chemical pipelines according to claim 3, characterized in that: The auxiliary mechanism (7) is provided in multiple ways, and the multiple auxiliary mechanisms (7) and multiple openings (53) are arranged alternately.

5. The exhaust gas collection device for liquid chemical pipelines according to claim 1, characterized in that: The housing (1) is provided with a support member (8), which is used to support the separating drum (5).

6. The exhaust gas collection device for liquid chemical pipelines according to claim 5, characterized in that: The support member (8) includes a support block (81) and a ball (82). The ball (82) is embedded in the support block (81). The ball (82) is in a rolling connection with the support block (81). The ball (82) abuts against the bottom of the separating drum (5).

7. The exhaust gas collection device for liquid chemical pipelines according to claim 1, characterized in that: The housing (1) is provided with a limiting member (9), which is used to achieve circumferential positioning of the separating drum (5).

8. The exhaust gas collection device for liquid chemical pipelines according to claim 7, characterized in that: The limiting member (9) includes at least three limiting wheels (91), which are circumferentially distributed around the axis of the separating drum (5), and the limiting wheels (91) abut against the outer wall of the separating drum (5).

9. A vent collection device for liquid chemical pipelines according to claim 7 or 8, characterized in that: The limiting member (9) is provided in two sets, and the two sets of limiting members (9) are distributed along the axis of the separating rotating drum (5).

10. The exhaust gas collection device for liquid chemical pipelines according to claim 1, characterized in that: The demisting net (72) abuts against the inner wall of the placement cavity (73) on the side away from the separation drum (5).

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