A tail gas safety treatment device for ethylene dichloride production and a method thereof

Abstract

The application discloses a tail gas safety treatment device for dichloroethylene production and a method thereof, and relates to the technical field of gas-liquid separation devices. The tail gas safety treatment device for dichloroethylene production comprises a primary separation box, a middle shaft, a separation cylinder and a gas inlet joint. The middle shaft is located in the primary separation box and can rotate in the primary separation box. The separation cylinder is arranged in a matrix mode outside the middle shaft. A centrifugal mechanism is arranged in the separation cylinder, and the other end of the centrifugal mechanism is rotatably installed on the middle shaft. An outlet is arranged at the end of the separation cylinder away from the center of the middle shaft. The side of the separation cylinder close to the outlet is provided with the gas inlet joint. The tail gas safety treatment device for dichloroethylene production and the method thereof can separate gas and liquid, discharge liquid and discharge gas separately. In the state of gas-liquid separation, the separation cylinder is in a nearly sealed state, so that the gas-liquid mixture which has not been completely separated cannot be discharged from the gas outlet joint or the liquid outlet, and the service life of the coalescing filter cartridge is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas-liquid separation devices, in particular to a tail gas safety treatment device for dichloroethylene production and a method thereof. BACKGROUND

[0002] In the production process of dichloroethylene using the oxychlorination method, the tail gas has the largest amount and the most complex composition.

[0003] Chlorinated volatile organic compounds are the main pollutant category in various process tail gas (especially oxychlorination tail gas and cracking separation tail gas), with a wide variety of types and great environmental hazards. Hydrogen chloride and chlorine gas are important acidic, corrosive and toxic gases that need to be effectively removed. Tail gas treatment process is crucial, and multiple technologies such as condensation, absorption (water washing, alkali washing), adsorption (activated carbon, etc.), deep cooling, membrane separation, incineration (thermal oxidation, which requires supporting efficient deacidification and dioxin control measures such as quenching, activated carbon adsorption, SCR / SNCR denitration) are usually combined to achieve environmental emission standards.

[0004] After condensation, the non-condensable gas entering the absorption tower is essentially "wet gas" containing condensate, so a corresponding gas-liquid separation device needs to be provided between the absorption tower and the condenser to separate the gas-liquid mixture cooled by the condenser, laying the foundation for the subsequent process (absorption tower gas treatment, condensate recovery).

[0005] The gas-liquid separation device in the prior art, such as the gas-liquid separator proposed in the patent with application number CN202410967485.5, in order to reduce the liquid content at the coalescing filter, sets a liquid blocking component inside the separation tower body and makes the liquid blocking component located between the cyclone and the coalescing filter. The corrosive droplets carried by the rising waste gas in the subsequent separation tower body can hit the bottom side of the first and second liquid blocking plates, and after the small droplets gather into larger droplets, they fall back to the bottom of the separation tower body, effectively intercepting the liquid droplets carried by the rising waste gas in the separation tower body and reducing the situation of corrosive droplets carried by the waste gas discharged from the top air outlet pipe of the separation tower body.

[0006] However, in essence, when the gas is discharged from the exhaust pipe during the blade centrifugation, the inlet pipe is in the inlet state, so the gas discharged from the exhaust pipe also carries a large amount of condensate. SUMMARY

[0007] In view of the deficiencies of the prior art, the present application provides a tail gas safety treatment device for dichloroethylene production and a method thereof, which solves the problem that in the prior art, liquid discharge, gas inlet and gas exhaust are performed synchronously, and unseparated liquid is discharged with the gas.

[0008] To achieve the above object, the application is implemented by the following technical solutions: a tail gas safety treatment device for dichloroethylene production, comprising:

[0009] A primary separation tank;

[0010] A middle shaft, which is located in the primary separation tank and can rotate in the primary separation tank;

[0011] A separation cylinder, which is arranged in a matrix outside the middle shaft, is provided with a centrifugal mechanism inside, and the other end of the centrifugal mechanism is rotatably installed on the middle shaft, one end of the separation cylinder away from the center of the middle shaft is provided with a liquid discharge port, one side of the separation cylinder close to the liquid discharge port is provided with an air inlet joint, and one side of the separation cylinder close to the center of the middle shaft is provided with an air outlet joint;

[0012] The upper part of the primary separation tank is an arc-shaped side formed by an optimal arc, the lower part of the primary separation tank is an open side, the separation cylinder is in an air inlet and internal gas-liquid centrifugal state when rotating to one side of the arc-shaped side, the separation cylinder is in a liquid discharge state when rotating to the open side, and the separation cylinder is in an air outlet state when rotating to the other side of the arc-shaped side.

[0013] Further, one end face of the primary separation tank is a tank plate one, and the other end face is a tank plate two;

[0014] The periphery of the separation cylinder is fixedly provided with a support, one side of the support close to the tank plate one is provided with a limiting sliding block, the inner wall of the tank plate one is provided with a limiting rail matched with the limiting sliding block, and the limiting rail comprises an arc rail, a flat rail and an inclined rail which are closed to form a closed structure, wherein the flat rail is opposite to the position of the open side, so that the separation cylinder is always in a vertical downward state for liquid discharge when moving to the open side region:

[0015] The centrifugal mechanism has a telescopic structure and an angle changing structure to compensate for the position change amount of the separation cylinder formed by the flat rail and the inclined rail.

[0016] Further, it further comprises a liquid downflow mechanism, which comprises:

[0017] A gear ring, which is rotatably installed at one end of the separation cylinder close to the liquid discharge port, and the inner wall of the gear ring is provided with a connecting block, the connecting block is provided with a scraper, the scraper is attached to the inner wall of the separation cylinder, and the area of the inner wall of the tank plate one opposite to the open side is provided with a gear rack part matched with the gear ring.

[0018] Further, it further comprises a feeding mechanism, which comprises an air inlet pipe core, the air inlet pipe core is part of the middle shaft, one end of the air inlet pipe core is fixedly connected with an air inlet disc, the outer arc surface of the air inlet disc is provided with air inlet pipes in a radial manner, the air inlet pipes are connected with the air inlet joint, and the inner part of one end of the air inlet pipes close to the air inlet joint is provided with a one-way valve mechanism.

[0019] Further, the exhaust mechanism comprises an exhaust pipe core as another part of the central shaft, one end of the exhaust pipe core is fixedly connected with an exhaust disc, an exhaust pipe is arranged between the exhaust disc and the exhaust joint, and a one-way valve mechanism is arranged at one end of the exhaust pipe close to the exhaust joint.

[0020] Further, the one-way valve mechanism comprises a ball, a spring I fixed on one side of the ball, and a valve rod fixed on the other end of the ball.

[0021] The first convex track is arranged at a region opposite to the rotating track of the valve rod in the inner wall of the box plate I, and the first convex track is located at the front section of the one side of the arc shape.

[0022] The second convex track is arranged at a region opposite to the rotating track of the valve rod in the inner wall of the box plate I, and the second convex track is located at the other side of the arc shape.

[0023] Further, the rotating mechanism is arranged on the central shaft and is used to drive the centrifugal mechanism to actively rotate when the central shaft rotates, and the rotating mechanism comprises:

[0024] The driving gear is fixed at one end of the centrifugal mechanism close to the center of the central shaft.

[0025] The acceleration gear is engaged with the driving gear close to one side of the box plate II, the bevel gear is coaxially arranged on the acceleration gear, the tooth ring is arranged on the inner wall of the box plate II and opposite to the bevel gear, and the tooth ring is located at a region on the arc-shaped side in the primary separation tank.

[0026] Further, the centrifugal mechanism comprises:

[0027] The driving rod is rotatably arranged on the central shaft.

[0028] The centrifugal rotating shaft is axially limited in the separation cylinder, and the centrifugal impeller is arranged on the periphery of the centrifugal rotating shaft.

[0029] The universal joint is used to connect the driving rod and the centrifugal rotating shaft, so that the centrifugal rotating shaft can form an angle with the driving rod.

[0030] Further, the centrifugal rotating shaft comprises:

[0031] The thickened part is axially limited at one end of the separation cylinder close to the center of the central shaft.

[0032] The shaft body is fixed on the thickened part, and the centrifugal impeller is fixedly connected with the shaft body.

[0033] One end of the telescopic rod is fixedly connected with the universal joint, the other end of the telescopic rod is inserted into the shaft body through the thickened part, and the spring II is arranged on the periphery of the telescopic rod.

[0034] On the other hand, the present invention also provides a method for safely treating tail gas from dichloroethylene production, which is applicable to the above-mentioned device for safely treating tail gas from dichloroethylene production, and comprises the following steps:

[0035] Step 1: As the central shaft rotates, the corresponding air inlet channel on the separation cylinder that reaches one side of the arc-shaped area opens, and the material is fed through the air inlet joint. The centrifugal mechanism is driven by the rotating mechanism to make the centrifugal impeller separate the gas-liquid mixture in the separation cylinder in a centrifugal manner;

[0036] Step 2: The separation cylinder that reaches the opening side area starts to drop liquid in a horizontal moving posture;

[0037] Step 3: The exhaust channel of the separation cylinder that reaches the front half of the other side of the arc side is opened, and the drain port is closed by the arc side. The exhaust channel is closed when the separation cylinder returns from the back half of the other side of the arc side to the top of the arc side.

[0038] The present invention has the following beneficial effects:

[0039] (1) The tail gas safety treatment device and method for the production of dichloroethylene can separate the gas-liquid separation, liquid discharge and exhaust actions, that is, in the state of gas-liquid separation, the entire separation cylinder is in a nearly sealed state, avoiding the situation where the gas-liquid mixture that has not been completely separated is discharged from the exhaust joint or the liquid discharge port, that is, ensuring that the gas-liquid mixture in the separation cylinder is nearly completely separated before the exhaust and liquid discharge actions are performed separately, thereby greatly increasing the liquid content of the gas entering the coalescing filter cartridge and extending the life of the coalescing filter cartridge.

[0040] (2) The tail gas safety treatment device and method for the production of dichloroethylene prolongs the time when the separation cylinder is in the vertical downward state by setting a flat track, thereby increasing its discharge volume, reducing the liquid remaining in the separation cylinder, and preventing the liquid that has been separated from being re-involved in the next stroke of liquid separation operation.

[0041] (3) The tail gas safety treatment device and method for the production of dichloroethylene can ensure that the scraper is in a rotating scraping state when the separation cylinder passes through the opening side by arranging a gear ring and a scraper, thereby further ensuring that the separation cylinder is completely discharged.

[0042] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 is an external schematic diagram of the present invention;

[0044] Figure 2 It is a cutaway schematic diagram of the present invention;

[0045] Figure 3 The appearance of the primary separation tank of the present application;

[0046] Figure 4 The exploded view of the primary separation tank of the present application;

[0047] Figure 5 The assembly view of the separation cylinder of the present application from the first perspective;

[0048] Figure 6 The assembly view of the separation cylinder of the present application from another perspective; Figure 4

[0049] Figure 7 The assembly view of the separation cylinder of the present application from another perspective; Figure 5

[0050] Figure 8 The assembly view of the single separation cylinder of the present application;

[0051] Figure 9 The assembly view of the single separation cylinder of the present application with the centrifugal mechanism;

[0052] Figure 10 The cross-sectional view of the separation cylinder of the present application;

[0053] Figure 11 The cross-sectional view of the shaft body of the present application;

[0054] Figure 12 The state view of the separation cylinder c of the present application reaching the flat rail initially;

[0055] Figure 13 The state view of the separation cylinder c of the present application reaching the end of the flat rail;

[0056] Figure 14 The assembly view of the one-way valve mechanism in the exhaust head of the present application;

[0057] Figure 15 The enlarged view of the A area of the present application; Figure 6

[0058] The enlarged view of the B area of the present application. Figure 16 Figure 4

[0059] ​​​​1, separation shell; 2, liquid discharge mechanism; 21, tooth ring; 22, connecting block; 23, scraper; 3, primary separation tank; 301, arc-shaped side; 302, open side; 31, tank plate one; 311, first convex rail; 312, second convex rail; 3121, slope; 32, tank plate two; 321, gear ring; 4, feeding mechanism; 41, air inlet pipe core; 42, air inlet disc; 43, air inlet branch pipe; 44, air inlet bellows; 45, air inlet head; 5, exhaust mechanism; 51, exhaust pipe core; 52, exhaust disc; 53, exhaust bellows; 54, exhaust head; 6, one-way valve mechanism; 61, valve rod; 62, ball; 63, spring one; 7, rotating mechanism; 71, bevel gear; 72, acceleration gear; 73, drive gear; 8, centrifugal mechanism; 81, drive rod; 82, universal joint; 83, centrifugal rotating shaft; 831, thickened part; 832, shaft body; 833, telescopic rod; 834, spring two; 835, limiting head; 9, support; 91, clamp; 92, frame-shaped frame; 93, ball; 94, limiting sliding block; 10, separation cylinder; 101, liquid discharge port; 102, air inlet connector; 103, exhaust connector; 1001, separation cylinder c; 1002, separation cylinder d; 12, limiting rail; 121, arc-shaped rail; 122, flat rail; 123, inclined rail; 13, rack part; 14, centrifugal impeller; 15, liquid discharge valve; 16, exhaust fan; 17, coalescing filter cartridge; 18, tension steel cable. DETAILED DESCRIPTION

[0060] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0061] In the description of the present application, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery" and the like indicate the orientation or positional relationship, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the components or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0062] The following is based on Figures 1-16 The device and method for safe treatment of tail gas in the production of dichloroethylene are described.

[0063] Embodiment one: please refer to Figures 1-3An embodiment of the present invention provides a tail gas safety treatment device for dichloroethylene production, comprising a separation shell 1, a primary separation box 3 is arranged at the lower part of the separation shell 1, for performing gas-liquid separation by centrifugation, thereby achieving preliminary gas-liquid separation, and the gas separated from the primary separation box 3 can enter the coalescing filter cartridge 17 above the separation shell 1, and after being filtered by the coalescing filter cartridge 17, be discharged from a chimney located on one side above the separation shell 1. Preferably, an exhaust fan 16 is assembled between the chimney and the separation shell 1 to provide the suction required for exhaust, and a drain valve 15 is provided at the lower part of the separation shell 1 to discharge the separated liquid out of the separation shell 1.

[0064] Combine Figures 2-6 As shown, in order to improve the separation effect in the above-mentioned primary separation box 3, a central shaft (the central shaft is essentially composed of an intake pipe core 41 and an exhaust pipe core 51, which is specifically described in detail at the feeding mechanism 4 and the exhaust mechanism 5) and a separation cylinder 10 are set in the primary separation box 3. The central shaft is located in the primary separation box 3, and a driving mechanism capable of driving the central shaft to rotate is set on one side of the outside of the separation shell 1. The driving mechanism should include a motor and a reducer so that the central shaft can rotate in the primary separation box 3. The separation cylinders 10 are arranged in a matrix outside the central shaft, and a centrifugal mechanism 8 is provided in the separation cylinder 10, and the centrifugal mechanism 8 is provided. The other end of the centrifugal mechanism 8 passes through the separation cylinder 10 and is rotatably installed on the central axis, that is, the centrifugal mechanism 8 can rotate along the center of the separation cylinder 10, so as to separate the gas-liquid mixture in the separation cylinder 10. A drain port 101 is provided at one end of the separation cylinder 10 away from the center of the central axis, which is used to discharge the separated liquid from the separation cylinder 10. An air inlet joint 102 is provided on the side of the separation cylinder 10 near the drain port 101, which is used to introduce the gas-liquid mixture into the separation cylinder 10. An exhaust joint 103 is provided on the side of the separation cylinder 10 near the center of the central axis, which is used to exhaust the separated gas.

[0065] In order to make the feeding of the air inlet joint 102, the drainage of the liquid outlet 101 and the exhaust of the exhaust joint 103 be carried out separately, the upper part of the primary separation box 3 is an arc-shaped side 301. The arc-shaped side 301 is not only arc-shaped in its circumferential direction, but also arc-shaped in the axial direction. That is to say, the inner wall along the arc-shaped side 301 should be a spherical arc. The drainage port 101 of the separation cylinder 10 is also set to a spherical arc. The arc-shaped side 301 is divided into two sides with a vertical line as the dividing line, as shown in FIG. Figure 4 , side a on the right, side b on the left. When the separation cylinder 10 passes through side a of the arc-shaped side 301, the discharge port 101 of the separation cylinder 10 should be in a closed state, that is, the discharge port 101 of the separation cylinder 10 is closed at this time. At this time, the separation cylinder 10 is in an air intake and internal gas-liquid centrifugal state, that is, the gas and liquid in the separation cylinder 10 are only centrifuged at this time, and there is no discharge or exhaust action in this process.

[0066] In addition, the lower part of the primary separation box 3 is the open side 302. When the separation cylinder 10 rotates to the area of ​​the open side 302, the drain port 101 is in a vertical downward state, that is, the drain port 101 is in a draining state at this time. When the separation cylinder 10 rotates to the other side of the arc-shaped side 301 (side b), the exhaust joint 103 is in an exhausting state.

[0067] Therefore, the tail gas safety treatment device for dichloroethylene production provided by the embodiment of the present invention can separate the actions of gas-liquid separation, drainage and exhaust, that is, in the state of gas-liquid separation, the entire separation cylinder 10 is in a nearly sealed state, avoiding the situation where the gas-liquid mixture that has not been completely separated is discharged from the exhaust joint 103 or the drain port 101, that is, ensuring that the gas-liquid mixture in the separation cylinder 10 is almost completely separated before the exhaust and drainage actions are performed separately. The reason for performing the exhaust and drainage actions separately is that the exhaust fan 16 will generate suction on the gas exhaust channel when working. Once the exhaust and drainage actions are performed at the same time, it is very likely that the gas in the separation shell 1 will be sucked into the drain port 101.

[0068] Combine Figures 3-7 As shown, in order to enable the centrifugal mechanism 8 to rotate in the separation cylinder 10 when the separation cylinder 10 rotates together with the central axis to separate the gas-liquid mixture in the separation cylinder 10, one end face of the primary separation box 3 is box plate 1 31, and the other end face is box plate 2 32, and a rotating mechanism 7 is provided at the part of the centrifugal mechanism 8 located outside the separation cylinder 10. The rotating mechanism 7 is provided on the central axis and is used to drive the centrifugal mechanism 8 to actively rotate when the central axis rotates.

[0069] Combine Figure 4 、 Figures 7-9 As shown, specifically, the rotating mechanism 7 includes a driving gear 73 and an acceleration gear 72. The driving gear 73 is fixed to one end of the centrifugal mechanism 8 close to the center of the central axis. The acceleration gear 72 is engaged with the driving gear 73 on the side close to the box plate 2 32. A coaxial bevel gear 71 is provided on the acceleration gear 72. A gear ring 321 is provided on the inner wall of the box plate 2 32 in an area opposite to the bevel gear 71, and the gear ring 321 is located in the area on the a side of the arc-shaped side 301 in the primary separation box 3.

[0070] In this embodiment, when the central shaft rotates, the centrifugal mechanism 8 can rotate around the center of the central shaft, thereby dragging the separation cylinder 10 to rotate around the central shaft. When the centrifugal mechanism 8 rotates to the a side of the arc-shaped side 301, the bevel gear 71 meshes with the gear ring 321. At this time, the bevel gear 71 drives the coaxial acceleration gear 72 to rotate, the acceleration gear 72 drives the driving gear 73 to accelerate rotation, thereby realizing the rapid rotation of the centrifugal mechanism 8, so that it can rotate around the center of the separation cylinder 10, and achieve the state of separating the gas-liquid mixture in the separation cylinder 10 at the a side of the arc-shaped side 301. Since the centrifugal mechanism 8 does not stop rotating at the a side, the liquid separated on the inner wall of the separation cylinder 10 will not fall off the inner wall of the separation cylinder 10 in a short time (the short time refers to the time when the separation cylinder 10 passes the a side). When the separation cylinder 10 reaches the opening side 302, the liquid discharge port 101 is vertically downward, and the centrifugal mechanism 8 no longer rotates. Therefore, the liquid on the inner wall of the separation cylinder 10 is only subjected to the force of vertical downward, so that the liquid can flow downward along the inner wall of the separation cylinder 10, thereby realizing the liquid discharge.

[0071] Preferably, a support 9 is fixed on the periphery of the separation cylinder 10. Preferably, the support 9 comprises a hoop 91 which is clamped on the periphery of the separation cylinder 10. The side of the hoop 91 is provided with a frame 92, which can prevent the separation cylinder 10 from rotating with the centrifugal mechanism 8. In addition, the frame 92 is provided with a plurality of balls 93 at the positions which are in contact with the first box plate 31 and the second box plate 32, thereby reducing the abrasion between the separation cylinder 10 and the first box plate 31 and the second box plate 32 when the separation cylinder 10 rotates with the central shaft.

[0072] In combination Figures 4-16 As shown, in actual work, the amount of gas-liquid mixture entering each separation cylinder 10 is not much, so once the separation cylinder 10 passes the a side, the amount of liquid accumulated on the inner wall of the separation cylinder 10 is still small, which will cause the liquid to not coagulate into a group, so that it cannot quickly fall from the inner wall of the separation cylinder 10. Therefore, a limiting sliding block 94 is arranged on the side of the support 9 close to the first box plate 31, and a limiting track 12 which is adapted to the limiting sliding block 94 is arranged on the inner wall of the first box plate 31. The limiting track 12 comprises an arc-shaped track 121, a flat track 122 and an inclined track 123 which are closed. The flat track 122 is opposite to the position of the opening side 302, so that the separation cylinder 10 is always in a vertically downward state when it moves to the opening side 302, that is, the vertically downward state of the separation cylinder 10 is prolonged, thereby improving the amount of liquid discharged from the inner wall of the separation cylinder 10.

[0073] Preferably, the limiting sliding block 94 is in a rectangular structure, which cannot rotate in the limiting track 12, thereby limiting the contact area between the limiting sliding block 94 and the two inner side walls of the limiting track 12 to be always unchanged. At this time, the separation cylinder 10 can be always perpendicular to the limiting track 12.

[0074] It should be noted that since the separation cylinder 10 is no longer simply rotating with the central shaft, the centrifugal mechanism 8 here needs to have a telescopic structure and an angle changing structure to compensate for the position change amount of the separation cylinder 10 formed by the flat rail 122 and the inclined rail 123.

[0075] Referring to Figures 8-11 , specifically, the centrifugal mechanism 8 mentioned above includes a driving rod 81, a centrifugal rotating shaft 83, and a universal joint 82. The driving rod 81 is radially rotatably mounted on the central shaft. The centrifugal rotating shaft 83 is axially limited in the separation cylinder 10. The centrifugal rotating shaft 83 has a centrifugal impeller 14 mounted on its periphery. The universal joint 82 is used to connect the driving rod 81 and the centrifugal rotating shaft 83, so that the centrifugal rotating shaft 83 can form an angle with the driving rod 81.

[0076] The universal joint 82 in this embodiment constitutes the angle changing structure mentioned above to adapt to the angle change amount of the separation cylinder 10 when passing through the area where the flat rail 122 and the inclined rail 123 are located.

[0077] In addition, it should be noted that although the universal joint 82 is provided, when the separation cylinder 10 passes through the arc-shaped side 301, the separation cylinder 10 is always coaxial with the driving rod 81 at this time due to the limitation of the limiting slide block 94.

[0078] Further, the centrifugal rotating shaft 83 mentioned above includes a thickened part 831, a shaft body 832, and a telescopic rod 833. The thickened part 831 is axially limited at one end of the separation cylinder 10 close to the center of the central shaft. The shaft body 832 is fixed on the thickened part 831, and the centrifugal impeller 14 is fixedly connected with the shaft body 832. The telescopic rod 833 has one end fixedly connected with the universal joint 82, and the other end inserted into the shaft body 832 through the thickened part 831. The telescopic rod 833 has a spring 834 sleeved on its periphery.

[0079] In this embodiment, when the centrifugal mechanism 8 revolves with the central shaft, and after the limiting slide block 94 enters the flat rail 122, since the driving rod 81 still revolves with the central shaft, but the limiting slide block 94 limits the horizontal movement of the separation cylinder 10, at this time the angle between the centrifugal rotating shaft 83 and the driving rod 81 is adjusted by the universal joint 82, the telescopic rod 833 compresses the spring 834 and gradually extends out of the shaft body 832, referring to the process of Figures 10-13 , taking one of the separation cylinders c1001 as an example, Figure 13 , and Figure 12 is a variation state diagram of the centrifugal mechanism 8 of the separation cylinder c1001 after the central shaft rotates counterclockwise by 30° in the state. During this process, the extension length of the telescopic rod 833 of the separation cylinder c1001 gradually increases, and the deflection angle of the universal joint 82 also gradually increases.

[0080] Preferably, a limit head 835 is provided at one end of the shaft body 832 away from the universal joint 82 to prevent the telescopic rod 833 from falling off the shaft body 832 .

[0081] Preferably, the cross-section of the telescopic rod 833 is a regular hexagonal structure, ensuring that the telescopic rod 833 can rotate synchronously with the shaft 832.

[0082] In actual work, Figure 13 On the basis of the above, when the middle shaft rotates continuously counterclockwise, the upper limit slider 94 is easily stuck in the corner area of ​​the flat rail 122 and the inclined rail 123. Therefore, the present invention provides the following solution: assemble the tension rope 18 between the two adjacent separation drums 10, Figure 13 In the state shown (when the separation drum c1001 is about to reach the corner area of ​​the flat rail 122 and the inclined rail 123), the tension rope 18 between the separation drum c1001 and the separation drum d1002 begins to tighten, and the middle shaft continues to rotate counterclockwise, and the separation drum d1002 begins to apply tension to the separation drum c1001 through the tension rope 18, thereby preventing the limit slider 94 from being easily stuck in the corner area of ​​the flat rail 122 and the inclined rail 123. In this state, the remaining tension ropes 18 are in a relaxed state, refer to Figure 13 .

[0083] Combine Figure 5 and Figure 7 Here, a feeding mechanism 4 is also provided, which includes an air intake core 41. The air intake core 41 is a part of the central axis. Figure 5 One end of the intake pipe core 41 is fixedly connected to the intake disk 42, and the outer arc surface of the intake disk 42 is radially provided with an intake pipe. The intake pipe includes an intake branch pipe 43 integrated with the intake disk 42, an intake bellows 44 provided at the other end of the intake branch pipe 43, and an intake head 45 provided at the other end of the intake bellows 44. The intake head 45 is connected to the intake connector 102, and a one-way valve mechanism 6 is provided inside the end of the intake head 45 close to the intake connector 102.

[0084] In this embodiment, the gas-liquid mixture enters the intake disc 42, the intake branch pipe 43, the intake bellows 44, the intake head 45 and the intake joint 102 in sequence from the intake pipe core 41. The one-way valve mechanism 6 on the separation cylinder 10 located in the front half of the a-side of the arc side 301 is opened for air intake. When it reaches the lower half of the a-side of the arc side 301, the one-way valve mechanism 6 on the separation cylinder 10 is closed. At this time, only rotational centrifugation is performed, that is, centrifugation is performed in a nearly closed state. External gas will not enter, and internal gas and liquid will not be discharged.

[0085] It should be noted that the air intake bellows 44 is a flexible structure, which is used to compensate for the position change of the separation barrel 10 when the position limiting track 12 changes.

[0086] Continuing to refer to Figure 5 and Figure 7 , here also set the exhaust mechanism 5, exhaust mechanism 5 includes exhaust pipe core 51, such as Figure 7 , exhaust pipe core 51 as another part of the shaft, one end of the exhaust pipe core 51 fixed communication with exhaust disc 52, intake pipe core 41, intake disc 42, exhaust pipe core 51 and exhaust disc 52 together constitute the shaft, in addition, exhaust disc 52 and intake disc 42 two do not communicate with each other, exhaust disc 52 and exhaust connector 103 between the exhaust pipe, the exhaust pipe includes fixed on the exhaust disc 52 exhaust bellows 53, exhaust head 54 provided at the other end of the exhaust bellows 53, the other end of the exhaust head 54 and exhaust connector 103 connected, in the exhaust pipe near the exhaust connector 103 one end is provided with a one-way valve mechanism 6.

[0087] In this embodiment, when the one-way valve mechanism 6 is opened, the separated gas from the exhaust connector 103 into the exhaust head 54, exhaust bellows 53 and exhaust disc 52, eventually from the exhaust pipe core 51 into the separation shell 1, and gradually rising to the coalescing cartridge 17.

[0088] As shown in Figure 8 and Figure 14 , the above-mentioned one-way valve mechanism 6 includes a ball 62, a spring 63 fixed on one side of the ball 62 and a valve rod 61 fixed on the other end of the ball 62, when the valve rod 61 pushes the ball 62, the spring 63 can be compressed, at this time the gas can pass through.

[0089] As shown in Figure 6 and Figure 15 , in order to realize the separation cylinder 10 located in the front of the arc side 301 region can be automatically fed, the inner wall of the box plate 31 and the valve rod 61 rotating track in the intake pipe relative to the region is provided with a first convex rail 311, and the first convex rail 311 is located in the front of the a side of the arc side 301, so that when the valve rod 61 moves to the front of a side, the first convex rail 311 can push the valve rod 61, so that the valve rod 61 can push the ball 62 to open.

[0090] Herein the said track relative to the first convex rail 311 should be the radius of the valve rod 61 to the center of the shaft consistent with the distance. Preferably, the two ends of the first convex rail 311 are provided with slope 3121, which facilitates the valve rod 61 in and out of the first convex rail 311.

[0091] In order to realize the automatic exhaust of the separation cylinder 10 reaching the b section of the arc-shaped side 301, the area of the inner wall of the box plate 1 31 opposite to the rotating track of the valve rod 61 of the exhaust pipeline is provided with a second convex rail 312, and the second convex rail 312 is located at the b side of the arc-shaped side 301, so that when the valve rod 61 moves to the b side, the second convex rail 312 can push the valve rod 61, so that the valve rod 61 can push the ball 62 to open, at this time the exhaust passage is opened. Preferably, the two ends of the second convex rail 312 are provided with slopes 3121, which facilitate the valve rod 61 to enter and exit the second convex rail 312.

[0092] Preferably, the end of the valve rod 61 away from the ball 62 is provided with a rolling ball.

[0093] Embodiment two:

[0094] In combination with the drawings Figure 4 , Figure 10 and Figure 16 , on the other hand, in order to further ensure that the liquid in the inner wall of the separation cylinder 10 located in the area of the opening side 302 can be completely discharged, here also provided with a liquid down mechanism 2, the liquid down mechanism 2 includes a gear ring 21, the gear ring 21 is rotatably installed at one end of the separation cylinder 10 close to the liquid outlet 101, and the inner wall of the gear ring 21 is provided with a connecting block 22, the connecting block 22 is provided with a scraper 23, preferably the scraper 23 is spiral, the scraper 23 is attached to the inner wall of the separation cylinder 10, and the area of the inner wall of the box plate 1 31 opposite to the opening side 302 is provided with a gear rack part 13 matched with the gear ring 21, when the separation cylinder 10 reaches the area of the opening side 302, the gear ring 21 rolls on the gear rack part 13, so as to drive the scraper 23 to rotate, the scraper 23 can scrape the liquid in the inner wall of the separation cylinder 10, the scraped liquid quickly forms a ball and flows downward to reach the liquid outlet valve 15.

[0095] It should be noted that the "the liquid outlet 101 of the separation cylinder 10 is also provided as a spherical arc" mentioned in embodiment one is replaced by the side of the gear ring 21 close to the arc-shaped side 301 in this embodiment.

[0096] When in use (when working), the gas-liquid mixture first enters the intake disc 42, the intake branch pipe 43, the intake bellows 44, and the intake head 45 in sequence through the intake pipe core 41. The valve stem 61 and the ball 62 on the separation cylinder 10 located in the front half of the side a of the arc side 301 area can be pushed by the first convex rail 311, thereby starting to intake the gas-liquid mixture. When the separation cylinder 10 enters the rear half of the side a, the ball 62 thereon is closed by the reset action of the spring 63, and the one-way valve mechanism 6 on the separation cylinder 10 is closed. At this time, only the rotational centrifugal operation is carried out (the centrifugal mechanism 8 drives the centrifugal impeller 14 to rotate and perform centrifugal operation through the cooperation of the rotating mechanism 7 and the gear ring 321). ), that is, centrifugal in a nearly closed state, the outside gas will not enter, and the internal gas and liquid will not be discharged. At this time, the centrifugal effect can be guaranteed. With the rotation of the central axis, the separation cylinder 10 enters the area where the opening side 302 is located. When discharging, the limit slider 94 slides in the flat rail 122. The angle change and length change of the centrifugal mechanism 8 can adapt to the position change of the separation cylinder 10. At the same time, the gear ring 21 on the separation cylinder 10 entering the area of ​​the opening side 302 rolls on the rack part 13, thereby driving the scraper 23 to rotate. The scraper 23 can scrape off the liquid on the inner wall of the separation cylinder 10. The scraped liquid quickly forms a mass and flows downward to reach the drain valve 15. When it is formed Figure 13 In the state shown, the tension steel rope 18 between the separation cylinder c1001 and the separation cylinder d1002 begins to tighten, and when the middle axis continues to rotate counterclockwise, the separation cylinder d1002 begins to apply tension to the separation cylinder c1001 through the tension steel rope 18, thereby preventing the limit slider 94 from being stuck in the corner area of ​​the flat rail 122 and the inclined rail 123. As the middle axis continues to rotate, the limit slider 94 of the separation cylinder c1001 returns to the arc rail 121. At this time, the second convex rail 312 opens the one-way valve mechanism 6 on the separation cylinder c1001, so that the separated gas can be discharged from the exhaust mechanism 5, and enter the separation shell 1, and reach the coalescing filter cylinder 17 for filtration, and the clean gas is discharged from the chimney.

[0097] On the other hand, the present invention also provides a method for safely treating tail gas from dichloroethylene production, which is applicable to the above-mentioned device for safely treating tail gas from dichloroethylene production, comprising the following steps:

[0098] Step 1: As the central shaft rotates, the corresponding air inlet channel on the separation cylinder 10 that reaches the area on one side of the arc-shaped side 301 opens, and feeds the material through the air inlet connector 102. The centrifugal mechanism 8 is driven by the rotating mechanism 7 to cause the centrifugal impeller 14 to centrifugally separate the gas-liquid mixture in the separation cylinder 10.

[0099] Step 2: The separation cylinder 10 reaches the opening side 302 area and starts to drop liquid in a horizontal moving posture;

[0100] Step three: the exhaust passage of the separation cylinder 10 is opened when it reaches the front half of the other side of the arc-shaped side 301, and the liquid discharge port 101 is closed by the arc-shaped side 301, and the exhaust passage is closed during the process that the separation cylinder 10 returns from the rear half of the other side of the arc-shaped side 301 to the position directly above the arc-shaped side 301.

[0101] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it being understood that the terms, such as first and second, are used to help identify one element from another element without necessarily requiring or implying any actual such relationship or order between such elements. Moreover, the use of the terms "including", "comprising", or "having" are used conjunctively and should be given their broadest interpretation to mean containing, involving or comprising, but not limited to.

[0102] The preferred embodiments of the application disclosed above are only used to help explain the application. The preferred embodiments do not describe all of the details of the application, and the application is not limited to the specific embodiments described. Obviously, many modifications and variations of the application can be made in light of the teachings above. The embodiments are chosen and described in order to explain the principles of the application and its practical application, so that others skilled in the art can understand the application and utilize it. The application is limited only by the claims and their full scope and equivalents.

Claims

1. A tail gas safety treatment device for dichloroethylene production, characterized in that: include: Primary separation box (3); A central shaft, the central shaft being located in the primary separation box (3) and capable of rotating in the primary separation box (3); Separation cylinders (10), the separation cylinders (10) are arranged in a matrix outside the central axis, a centrifugal mechanism (8) is provided in the separation cylinder (10), and the other end of the centrifugal mechanism (8) is rotatably mounted on the central axis, a liquid discharge port (101) is provided at one end of the separation cylinder (10) away from the central axis, an air inlet connector (102) is provided on a side of the separation cylinder (10) close to the liquid discharge port (101), and an air discharge connector (103) is provided on a side of the separation cylinder (10) close to the central axis; The upper portion of the primary separation box (3) is an arc-shaped side (301) formed by a superior arc, and the lower portion of the primary separation box (3) is an open side (302). When the separation cylinder (10) rotates to one side of the arc-shaped side (301), it is in an air intake and internal gas-liquid centrifugal state. When the separation cylinder (10) rotates to the area of ​​the open side (302), it is in a liquid discharge state at the liquid discharge port (101). When the separation cylinder (10) reaches the other side of the arc-shaped side (301), it is in a state of exhausting gas at the exhaust joint (103). One end surface of the primary separation box (3) is box plate 1 (31), and the other end surface is box plate 2 (32); A bracket (9) is fixedly provided on the periphery of the separation cylinder (10), and a limiting slider (94) is provided on the side of the bracket (9) close to the box plate (31). A limiting track (12) adapted to the limiting slider (94) is provided on the inner wall of the box plate (31). The limiting track (12) includes an arc-shaped track (121), a flat track (122), and an inclined track (123) that enclose a closed structure, wherein the flat track (122) is opposite to the position of the opening side (302), so that the separation cylinder (10) is always in a vertical downward state to discharge liquid when it moves to the opening side (302) area: The centrifugal mechanism (8) has a telescopic structure and an angle-changing structure to compensate for the position change caused by the flat rail (122) and the inclined rail (123) on the separation cylinder (10).

2. The tail gas safety treatment device for dichloroethylene production according to claim 1 is characterized in that: It also includes a liquid discharge mechanism (2), wherein the liquid discharge mechanism (2) includes: A gear ring (21) is rotatably mounted on one end of the separation cylinder (10) near the liquid discharge port (101), and a connecting block (22) is provided on the inner wall of the gear ring (21). A scraper (23) is mounted on the connecting block (22), and the scraper (23) is attached to the inner wall of the separation cylinder (10). A rack portion (13) adapted to the gear ring (21) is provided in an area on the inner wall of the box plate (31) opposite to the opening side (302).

3. The tail gas safety treatment device for dichloroethylene production according to claim 2, characterized in that: The invention also includes a feeding mechanism (4), wherein the feeding mechanism (4) includes an air intake pipe core (41), the air intake pipe core (41) serving as a part of the central axis, one end of the air intake pipe core (41) being fixedly connected to an air intake disk (42), an outer arc surface of the air intake disk (42) being radially provided with an air intake pipe, the air intake pipe being connected to an air intake connector (102), and a one-way valve mechanism (6) being provided inside an end of the air intake pipe close to the air intake connector (102).

4. The tail gas safety treatment device for dichloroethylene production according to claim 3, characterized in that: The exhaust mechanism (5) further comprises an exhaust pipe core (51), the exhaust pipe core (51) serving as another portion of the central axis, one end of the exhaust pipe core (51) being fixedly connected to an exhaust disk (52), an exhaust pipe being provided between the exhaust disk (52) and the exhaust connector (103), and a one-way valve mechanism (6) being provided at one end of the exhaust pipe close to the exhaust connector (103).

5. The tail gas safety treatment device for dichloroethylene production according to claim 4, characterized in that: The one-way valve mechanism (6) includes a sphere (62), a spring (63) fixed to one side of the sphere (62), and a valve stem (61) fixed to the other end of the sphere (62); A first convex track (311) is provided in an area of ​​the inner wall of the box plate (31) opposite to the rotation track of the valve stem (61) in the air intake pipe, and the first convex track (311) is located at the front section of one side of the arc-shaped side (301); A second convex track (312) is provided in an area of ​​the inner wall of the box plate (31) opposite to the rotation track of the valve stem (61) in the exhaust pipe, and the second convex track (312) is located on the other side of the arc side (301).

6. The tail gas safety treatment device for dichloroethylene production according to claim 1, characterized in that: The device further comprises a rotating mechanism (7), which is arranged on the central shaft and is used to drive the centrifugal mechanism (8) to actively rotate when the central shaft rotates. The rotating mechanism (7) comprises: A driving gear (73), wherein the driving gear (73) is fixed to one end of the centrifugal mechanism (8) close to the center of the central axis; An acceleration gear (72) is engaged with a driving gear (73) on a side of the acceleration gear (72) close to the second box plate (32). A coaxial bevel gear (71) is provided on the acceleration gear (72). A gear ring (321) is provided on the inner wall of the second box plate (32) in an area opposite to the bevel gear (71), and the gear ring (321) is located in an area on one side of the arc-shaped side (301) inside the primary separation box (3).

7. A tail gas safety treatment device for dichloroethylene production according to any one of claims 1 to 5, characterized in that: The centrifugal mechanism (8) comprises: A driving rod (81), wherein the driving rod (81) is rotatably mounted on the central shaft; A centrifugal rotating shaft (83), wherein the centrifugal rotating shaft (83) is axially limited within the separation cylinder (10), and a centrifugal impeller (14) is installed on the periphery of the centrifugal rotating shaft (83); A universal joint (82) is used to connect the driving rod (81) and the centrifugal shaft (83), so that the centrifugal shaft (83) can form an angle with the driving rod (81).

8. The tail gas safety treatment device for dichloroethylene production according to claim 7, characterized in that: The centrifugal shaft (83) comprises: A thickened portion (831), the thickened portion (831) being axially limited to one end of the separation cylinder (10) close to the center of the central axis; A shaft body (832), wherein the shaft body (832) is fixed on the thickened portion (831), and the centrifugal impeller (14) is fixedly connected to the shaft body (832); A telescopic rod (833) is provided, wherein one end of the telescopic rod (833) is fixedly connected to the universal joint (82), and the other end of the telescopic rod (833) is inserted into the shaft body (832) through the thickened portion (831). A second spring (834) is provided on the outer periphery of the telescopic rod (833).

9. A method for safely treating tail gas from the production of dichloroethylene, applicable to the device for safely treating tail gas from the production of dichloroethylene according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: As the central axis rotates, the corresponding air inlet channel on the separation cylinder (10) reaching the area on one side of the arc-shaped side (301) is opened, and the material is fed through the air inlet connector (102), and the centrifugal mechanism (8) is driven by the rotating mechanism (7) to make the centrifugal impeller (14) separate the gas-liquid mixture in the separation cylinder (10) in a centrifugal manner; Step 2: The separation cylinder (10) reaches the opening side (302) area and starts to lower the liquid in a horizontally moving posture; Step 3: The exhaust passage of the separation cylinder (10) that reaches the front half of the other side of the curved side (301) is opened, the drain port (101) is closed by the curved side (301), and the exhaust passage is closed during the process of the separation cylinder (10) returning from the rear half of the other side of the curved side (301) to the top of the curved side (301).

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