Tail gas safety treatment device and method for dichloroethylene production

Abstract

The invention discloses a tail gas safety treatment device and method for dichloroethylene production, 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; the middle shaft is located in the primary separation box, and the middle shaft can rotate in the primary separation box; the separation cylinders are arranged outside the middle shaft in a matrix mode, centrifugal mechanisms are arranged in the separation cylinders, the other ends of the centrifugal mechanisms are rotationally installed on the middle shaft, liquid outlets are formed in the ends, away from the circle center of the middle shaft, of the separation cylinders, and air inlet connectors are arranged on the sides, close to the liquid outlets, of the side faces of the separation cylinders; according to the tail gas safety treatment device and method for dichloroethylene production, the actions of gas-liquid separation, liquid discharging and gas exhausting can be separated, in the gas-liquid separation state, the separation barrel is in an approximately sealed state, the situation that a gas-liquid mixture which is not thoroughly separated is discharged from a gas exhausting connector or a liquid discharging opening is avoided, and the service life of a coalescence filter barrel is prolonged.

Description

Technical Field

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

[0002] During the production of dichloroethylene using the oxychlorination method, the tail gas volume is the largest and the composition is the most complex.

[0003] Chlorinated volatile organic compounds (VOCs) are the primary pollutants in various process off-gases (especially oxychlorination and cracking off-gases). They are numerous and pose a significant environmental risk. Hydrogen chloride and chlorine are significant acidic, corrosive, and toxic gases that require effective removal. Off-gas treatment processes are crucial, typically employing a combination of technologies such as condensation, absorption (water washing, alkaline washing), adsorption (activated carbon, etc.), cryogenics, membrane separation, and incineration (thermal oxidation, which requires support with efficient deacidification and dioxin control measures such as quenching, activated carbon adsorption, and SCR / SNCR denitrification) to meet environmental emission standards.

[0004] After condensation, the non-condensable gas entering the absorption tower is actually "moisture" containing condensate, so it is necessary to equip a corresponding gas-liquid separation device between the absorption tower and the condensation tower to separate the gas-liquid mixture after cooling by the condenser, laying the foundation for subsequent processes (gas treatment in the absorption tower and condensate recovery).

[0005] The gas-liquid separation device in the prior art, such as a gas-liquid separator proposed in the patent with application number CN202410967485.5, is a device that, in order to reduce the liquid content in the coalescing filter element, provides a liquid retaining assembly inside the separation tower body and places the liquid retaining assembly between the cyclone and the coalescing filter element. The corrosive droplets carried in the rising exhaust gas of the subsequent separation tower body can collide with the bottom sides of the first liquid retaining plate and the second liquid retaining plate. After the small droplets converge into larger droplets, they will drip back to the bottom of the separation tower body, effectively intercepting the droplets carried in the rising exhaust gas of the separation tower body, and reducing the situation where the corrosive droplets are carried in the exhaust gas discharged from the top outlet pipe of the separation tower body.

[0006] However, in reality, when the blades are centrifuged, the gas discharged from the exhaust pipe is in the intake pipe liquid state, so the gas discharged from the exhaust pipe will also carry a large amount of condensed liquid. Summary of the Invention

[0007] In view of the shortcomings of the existing technology, the present invention provides a tail gas safety treatment device and method for dichloroethylene production, which solves the problem in the existing technology that liquid discharge, air intake and exhaust are carried out simultaneously, and the unseparated liquid is discharged mixed with the gas.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: A tail gas safety treatment device for dichloroethylene production, comprising: Primary separation box; A central shaft, the central shaft being located in the primary separation box and being capable of rotating in the primary separation box; The separation cylinders are arranged in a matrix outside the central axis, a centrifugal mechanism is provided inside the separation cylinder, and the other end of the centrifugal mechanism is rotatably mounted on the central axis, a liquid discharge port is provided at one end of the separation cylinder away from the center of the central axis, an air inlet joint is provided on the side of the separation cylinder close to the liquid discharge port, and an air exhaust joint is provided on the side of the separation cylinder close to the center of the central axis; The upper part of the primary separation box is the arc-shaped side formed by the superior arc, and the lower part of the primary separation box is the open side. When the separation cylinder rotates to one side of the arc-shaped side, it is in an air intake and internal gas-liquid centrifugal state. When the separation cylinder rotates to the area of ​​the open side, it is in a liquid discharge state at the discharge port. When the separation cylinder reaches the other side of the arc-shaped side, it is in a state of exhaust at the exhaust joint.

[0009] Furthermore, one end surface of the primary separation box is box plate 1, and the other end surface is box plate 2; A bracket is fixedly provided on the periphery of the separation cylinder. A limiting slider is provided on the side of the bracket close to the box plate 1. A limiting track adapted to the limiting slider is provided on the inner wall of the box plate 1. The limiting track includes an arc track, a flat track and an inclined track that form a closed structure. The flat track is opposite to the position of the opening side, so that the separation cylinder is always in a vertical downward state to discharge liquid when it moves to the opening side area. The centrifugal mechanism has a telescopic structure and an angle change structure to compensate for the position change of the separation cylinder caused by the flat rail and the inclined rail.

[0010] Furthermore, it also includes a liquid discharge mechanism, which includes: A gear ring is rotatably mounted on one end of the separation cylinder near the drain port, and a connecting block is provided on the inner wall of the gear ring, a scraper is mounted on the connecting block, and the scraper is attached to the inner wall of the separation cylinder, and a rack portion adapted to the gear ring is provided in an area on the inner wall of the box plate opposite to the opening side.

[0011] Furthermore, it also includes a feeding mechanism, which includes an air intake pipe core, which serves as a part of the central axis. One end of the air intake pipe core is fixedly connected to an air intake disk. The outer arc surface of the air intake disk is radially provided with an air intake pipe, which is connected to the air intake joint. A one-way valve mechanism is provided inside the end of the air intake pipe close to the air intake joint.

[0012] Furthermore, it also includes an exhaust mechanism, which includes an exhaust pipe core. The exhaust pipe core serves as another part of the central axis. One end of the exhaust pipe core is fixedly connected to an exhaust disk. An exhaust pipe is provided between the exhaust disk and the exhaust joint. A one-way valve mechanism is provided at one end of the exhaust pipe close to the exhaust joint.

[0013] Furthermore, the one-way valve mechanism includes a ball, a spring fixed to one side of the ball, and a valve stem fixed to the other end of the ball; A first convex track is provided in an area of ​​an inner wall of the box plate opposite to the rotation track of the valve stem in the air intake duct, and the first convex track is located at the front section of one side of the arc-shaped side; A second convex track is provided in an area of ​​an inner wall of the box plate opposite to the rotation track of the valve stem in the exhaust pipe, and the second convex track is located on the other side of the arc side.

[0014] Furthermore, it also includes a rotating mechanism, which is arranged on the central shaft and is used to drive the centrifugal mechanism to actively rotate when the central shaft rotates. The rotating mechanism includes: A driving gear, the driving gear being fixed to one end of the centrifugal mechanism close to the center of the central axis; An acceleration gear is engaged with a driving gear on the side of the acceleration gear close to the second box plate, and a coaxial bevel gear is provided on the acceleration gear. A gear ring is provided in the area opposite to the bevel gear on the inner wall of the second box plate, and the gear ring is located in the area on one side of the arc side in the primary separation box.

[0015] Furthermore, the centrifugal mechanism comprises: A driving rod, the driving rod being rotatably mounted on the central shaft; A centrifugal shaft, wherein the centrifugal shaft is axially limited in the separation cylinder, and a centrifugal impeller is installed on the periphery of the centrifugal shaft; The universal joint is used to connect the driving rod and the centrifugal shaft so that the centrifugal shaft can form an angle with the driving rod.

[0016] Furthermore, the centrifugal shaft includes: A thickened portion, wherein the thickened portion is axially limited to an end of the separation cylinder close to the center of the central axis; A shaft body, wherein the shaft body is fixed on the thickened portion, and the centrifugal impeller is fixedly connected to the shaft body; A telescopic rod, one end of which is fixedly connected to the universal joint, the other end of which is inserted into the shaft body through the thickened portion, and a second spring is provided on the outer periphery of the telescopic rod.

[0017] 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: Step 1: As the central shaft rotates, the corresponding air inlet channel on the separation cylinder that reaches one side of the arc-shaped side opens, and the material is fed through the air inlet joint, and 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; Step 2: The separation cylinder that reaches the opening side area starts to drop liquid in a horizontal moving posture; 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.

[0018] The present invention has the following beneficial effects: (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.

[0019] (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.

[0020] (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.

[0021] 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

[0022] Figure 1 is an external schematic diagram of the present invention; Figure 2 It is a cutaway schematic diagram of the present invention; Figure 3 This is a schematic diagram of the appearance of the primary separation box of the present invention; Figure 4 This is an exploded schematic diagram of the primary separation box of the present invention; Figure 5 This is a schematic diagram of the assembly of the separation cylinder of the present invention from a first perspective; Figure 6 For the present invention Figure 4Schematic diagram from another perspective; Figure 7 For the present invention Figure 5 Schematic diagram from another perspective; Figure 8 This is a schematic diagram of the assembly of a single separation cylinder of the present invention; Figure 9 Schematic diagram of the cooperation between a single separation cylinder and a centrifugal mechanism of the present invention; Figure 10 Schematic diagram of the separation cylinder of the present invention; Figure 11 It is a schematic cross-sectional view of the shaft body of the present invention; Figure 12 This is a schematic diagram of the state in which the separation cylinder c of the present invention initially reaches the flat track; Figure 13 This is a schematic diagram of the state where the separation cylinder c of the present invention reaches the end of the flat track; Figure 14 This is a schematic diagram of the assembly of the one-way valve mechanism of the present invention in the exhaust header; Figure 15 For the present invention Figure 6 A magnified schematic diagram of area A; Figure 16 for Figure 4 Schematic diagram of the enlarged area B.

[0023] In the figure, 1. separation shell; 2. liquid discharge mechanism; 21. gear ring; 22. connecting block; 23. scraper; 3. primary separation box; 301. arc side; 302. opening side; 31. box plate 1; 311. first convex rail; 312. second convex rail; 3121. slope; 32. box plate 2; 321. gear ring; 4. feeding mechanism; 41. intake pipe core; 42. intake disc; 43. intake branch pipe; 44. intake bellows; 45. intake head; 5. exhaust mechanism; 51. exhaust pipe core; 52. exhaust disc; 53. exhaust bellows; 54. exhaust head; 6. one-way valve mechanism; 61. valve stem; 62. ball; 63. spring 1; 7. rotating mechanism; 71. bevel gear; 72. acceleration Gear; 73, driving gear; 8, centrifugal mechanism; 81, driving rod; 82, universal joint; 83, centrifugal shaft; 831, thickened part; 832, shaft; 833, telescopic rod; 834, spring 2; 835, limit head; 9, bracket; 91, clamp; 92, frame; 93, ball; 94, limit slider; 10, separation cylinder; 101, drain port; 102, air inlet connector; 103, exhaust connector; 1001, separation cylinder c; 1002, separation cylinder d; 12, limit rail; 121, curved rail; 122, flat rail; 123, inclined rail; 13, rack; 14, centrifugal impeller; 15, drain valve; 16, exhaust fan; 17, coalescing filter cartridge; 18, tension rope. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0026] The following is based on Figures 1-16 The invention provides an embodiment of an apparatus and method for safely treating tail gas used in the production of dichloroethylene.

[0027] Example 1: Please refer to Figure 1-Figure 3 An 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.

[0028] Combine Figure 2-Figure 6As 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] Combine Figure 3-Figure 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.

[0033] Combine Figure 4 、 Figure 7-Figure 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.

[0034] In this embodiment, when the central shaft rotates, it can drive the centrifugal mechanism 8 to rotate with the center of the central shaft as the center, thereby dragging the separation cylinder 10 to rotate with the central shaft as the center along with the rotating shaft. When the centrifugal mechanism 8 rotates to the a side of the arc side 301, the bevel gear 71 engages with the ring gear 321. At this time, the bevel gear 71 drives the acceleration gear 72 coaxial with it to rotate, and the acceleration gear 72 drives the driving gear 73 to accelerate the rotation, thereby realizing the rapid rotation of the centrifugal mechanism 8, so that it can rotate with the center of the separation cylinder 10 as the axis, and achieve the state of gas-liquid separation of the gas-liquid mixture in the separation cylinder 10 when it is on the a side of the arc side 301. Since the centrifugal mechanism 8 rotates continuously on the a side, the liquid separated on the inner wall of the separation cylinder 10 will not fall off from the inner wall of the separation cylinder 10 in a short time (the short time refers to the time from the separation cylinder 10 to the a side). When the separation cylinder 10 reaches the area of ​​the open side 302, its 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 a vertical downward force, so that the liquid can flow downward along the inner wall of the separation cylinder 10 to achieve liquid drainage.

[0035] Preferably, a bracket 9 is fixedly provided on the periphery of the separation cylinder 10. Preferably, the bracket 9 includes a clamp 91, which is engaged with the periphery of the separation cylinder 10. A frame 92 is provided on the side of the clamp 91 to prevent the separation cylinder 10 from rotating along with the centrifugal mechanism 8. In addition, balls 93 are provided on the frame 92 at a position in contact with box plate 1 31 and box plate 2 32, thereby reducing the wear between the separation cylinder 10 and box plate 1 31 and box plate 2 32 when the separation cylinder 10 rotates along with the central axis.

[0036] Combine Figure 4-Figure 16 As shown, during actual operation, the amount of gas-liquid mixture that can enter each separation cylinder 10 is not much, so once the separation cylinder 10 has completed side a, the amount of liquid accumulated on its inner wall is still small, which will cause the liquid to not condense into a mass, making it unable to quickly fall from the inner wall of the separation cylinder 10. Therefore, a limiting slider 94 is provided on the side of the bracket 9 close to the box plate 31, and 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 rail 121, a flat rail 122 and an inclined rail 123 that enclose a closed structure, wherein the flat rail 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, that is, the vertical state of the separation cylinder 10 is extended, thereby increasing the discharge amount of liquid from the inner wall of the separation cylinder 10.

[0037] Preferably, the limiting slider 94 is a rectangular structure, which cannot rotate within the limiting track 12, thereby limiting the contact surface between the limiting slider 94 and the two inner side walls of the limiting track 12 to remain unchanged. At this time, the separation cylinder 10 can be limited to always be perpendicular to the limiting track 12.

[0038] It should be noted that since the separation cylinder 10 no longer performs simple rotational motion along the central axis, the centrifugal mechanism 8 here needs to have a telescopic structure and an angle change structure to compensate for the position change of the separation cylinder 10 caused by the flat rail 122 and the inclined rail 123.

[0039] Reference Figures 8-11 As shown, specifically, the centrifugal mechanism 8 mentioned above includes a drive rod 81, a centrifugal shaft 83 and a universal joint 82. The drive rod 81 is radially rotatably installed on the central axis, the centrifugal shaft 83 is axially limited in the separation cylinder 10, and a centrifugal impeller 14 is installed on the periphery of the centrifugal shaft 83. The universal joint 82 is used to connect the drive rod 81 and the centrifugal shaft 83 so that the centrifugal shaft 83 can form an angle with the drive rod 81.

[0040] The universal joint 82 in this embodiment constitutes the above-mentioned angle change structure to adapt to the angle change of the separation barrel 10 when it passes through the area where the flat rail 122 and the inclined rail 123 are located.

[0041] In addition, it should be noted that although the universal joint 82 is provided, when the separation cylinder 10 passes the arcuate side 301 , the separation cylinder 10 is always coaxial with the driving rod 81 because the separation cylinder 10 is limited by the limiting slider 94 .

[0042] Furthermore, the above-mentioned centrifugal shaft 83 includes a thickened portion 831, a shaft body 832 and a telescopic rod 833. The thickened portion 831 is axially limited at one end of the separation cylinder 10 close to the center of the central axis. The shaft body 832 is fixed on the thickened portion 831, and the centrifugal impeller 14 is fixedly connected to the shaft body 832; the telescopic rod 833, 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, and a spring 2 834 is provided on the outer periphery of the telescopic rod 833.

[0043] In this embodiment, when the centrifugal mechanism 8 revolves with the central axis and the limit slider 94 enters the flat rail 122, since the driving rod 81 still revolves with the central axis, but the limit slider 94 limits the horizontal movement of the separation cylinder 10, the centrifugal shaft 83 and the driving rod 81 adjust the angle by the universal joint 82, and the telescopic rod 833 compresses the spring 834 and gradually extends from the shaft body 832. Figure 10-13 The process, taking one of the separation cylinders c1001 as an example, Figure 13 yes Figure 12 The diagram shows the changing state of the centrifugal mechanism 8 of the separation cylinder c1001 after the central axis rotates 30° counterclockwise in this state. During this process, the extended 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.

[0044] 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 .

[0045] 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.

[0046] 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 .

[0047] 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.

[0048] 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.

[0049] 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.

[0050] Continue to refer to Figure 5 and Figure 7 , an exhaust mechanism 5 is also provided here, and the exhaust mechanism 5 includes an exhaust pipe core 51, as shown Figure 7 The exhaust pipe core 51 serves as another part of the central axis. One end of the exhaust pipe core 51 is fixedly connected to the exhaust disk 52. The intake pipe core 41, the intake disk 42, the exhaust pipe core 51 and the exhaust disk 52 together constitute the central axis. In addition, the exhaust disk 52 and the intake disk 42 are not connected to each other. An exhaust pipe is provided between the exhaust disk 52 and the exhaust joint 103. The exhaust pipe includes an exhaust bellows 53 fixed on the exhaust disk 52 and an exhaust head 54 provided at the other end of the exhaust bellows 53. The other end of the exhaust head 54 is connected to the exhaust joint 103. A one-way valve mechanism 6 is provided at one end of the exhaust pipe close to the exhaust joint 103.

[0051] In this embodiment, when the one-way valve mechanism 6 is opened, the separated gas enters the exhaust head 54, the exhaust bellows 53 and the exhaust disc 52 from the exhaust joint 103, and finally enters the separation shell 1 from the exhaust pipe core 51, and gradually rises to the coalescing filter cartridge 17.

[0052] like Figure 8 and Figure 14 As shown, the one-way valve mechanism 6 includes a ball 62, a spring 63 fixed to one side of the ball 62, and a valve stem 61 fixed to the other end of the ball 62. When the valve stem 61 pushes the ball 62, the spring 63 can be compressed, and the gas can pass through.

[0053] Combine Figure 6 and Figure 15 As shown, in order to achieve automatic feeding of the separation cylinder 10 located at the front section of the arc-shaped side 301 area, a first convex rail 311 is provided in the area on 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 rail 311 is located at the front section of the a side of the arc-shaped side 301, so that when the valve stem 61 moves to the front section of the a side, the first convex rail 311 can push the valve stem 61, so that the valve stem 61 can push the ball 62 to open.

[0054] The relative track here refers to the fact that the radius of the first convex track 311 is consistent with the distance from the valve stem 61 to the center of the central axis. Preferably, ramps 3121 are provided at both ends of the first convex track 311 to facilitate the valve stem 61 to enter and exit the first convex track 311.

[0055] To enable automatic exhaust of the separator 10 that reaches section b of the curved side 301, a second raised rail 312 is provided on the inner wall of the box plate 1 31 in an area opposite the rotational trajectory of the valve stem 61 in the exhaust duct. The second raised rail 312 is located on the b side of the curved side 301. When the valve stem 61 moves to the b side, the second raised rail 312 pushes the valve stem 61, causing the valve stem 61 to push the ball 62 open, thereby opening the exhaust duct. Preferably, ramps 3121 are provided at both ends of the second raised rail 312 to facilitate the valve stem 61's entry and exit from the second raised rail 312.

[0056] Preferably, a rolling ball is provided at one end of the valve stem 61 away from the ball 62 .

[0057] Example 2: Combine Figure 4 、 Figure 10 as well as Figure 16 As shown, on the other hand, in order to further ensure that the liquid on the inner wall of the separation cylinder 10 located in the area of ​​the opening side 302 can be completely discharged, a liquid discharge mechanism 2 is also provided here, which includes a gear ring 21, which is rotatably mounted on one end of the separation cylinder 10 near the discharge port 101, and a connecting block 22 is provided on the inner wall of the gear ring 21, and a scraper 23 is installed on the connecting block 22. The preferred scraper 23 is spiral, and the scraper 23 fits the inner wall of the separation cylinder 10. The area on the inner wall of the box plate 31 opposite to the opening side 302 is provided with a rack portion 13 adapted to the gear ring 21. When the separation cylinder 10 reaches the area of ​​the opening side 302, the gear ring 21 rolls on the rack portion 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, and the scraped liquid quickly clumps and flows downward to reach the discharge valve 15.

[0058] It should be noted that the “liquid discharge port 101 of the separation cylinder 10 is also set to a spherical arc” mentioned in the first embodiment is replaced by a spherical arc on the side of the gear ring 21 close to the arc side 301 in this embodiment.

[0059] 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.

[0060] 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: 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. Step 2: The separation cylinder 10 reaches the opening side 302 area and starts to drop liquid in a horizontal moving posture; Step 3: The exhaust channel 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 channel 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.

[0061] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0062] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention 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).

2. The tail gas safety treatment device for dichloroethylene production according to claim 1, characterized in that: 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).

3. The tail gas safety treatment device for dichloroethylene production according to claim 2 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).

4. The tail gas safety treatment device for dichloroethylene production according to claim 3, 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).

5. The tail gas safety treatment device for dichloroethylene production according to claim 4, 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).

6. The tail gas safety treatment device for dichloroethylene production according to claim 5, 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).

7. The tail gas safety treatment device for dichloroethylene production according to claim 2, 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).

8. A tail gas safety treatment device for ethylene dichloride production according to any one of claims 1 to 6, 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).

9. The tail gas safety treatment device for dichloroethylene production according to claim 8, 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).

10. 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 9, 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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