Continuous distillation device in MCPP propionic acid production

Abstract

The utility model discloses a continuous distillation device in MCPP propionic acid production, which comprises a base as well as a distillation tower and a condensing tower which are arranged on the base, and further comprises a dispersion component which is arranged in the distillation tower and is used for dispersing discharged MCPP propionic acid mixed liquor, and the dispersion component comprises a fixed ring which is fixedly connected to the inner wall of the distillation tower, the fixing ring is located above the tower plate, the side, away from the tower plate, of the fixing ring is connected with a dispersion hollow ring through a positioning assembly, and the ends, close to each other, of the two corrugated pipes are fixedly connected with an L-shaped liquid outlet pipe. According to the utility model, through the arrangement of the dispersing assembly, the MCPP propionic acid mixed solution flows to the tower plate at different positions, so that the discharging uniformity of the MCPP propionic acid mixed solution is improved, and the risk of local accumulation or bias flow on the tower plate due to higher viscosity and single discharging position of the MCPP propionic acid mixed solution is reduced.

Description

Technical Field

[0001] This utility model relates to the field of MCPP propionic acid production technology, specifically a continuous distillation device for MCPP propionic acid production. Background Technology

[0002] The continuous distillation unit in MCPP propionic acid production mainly includes components such as distillation column, reboiler and condenser. It mainly utilizes the different volatility of the components in the MCPP propionic acid liquid mixture to partially vaporize the liquid mixture and then partially condense the vapor, thereby achieving the separation of its components.

[0003] When continuously distilling MCPP propionic acid, the MCPP propionic acid mixture is transported from the storage tank to the distillation column. Due to the high viscosity of MCPP propionic acid, its flow properties are poor, and the single discharge point makes it easy for local accumulation or flow deviation to occur on the column plates. As a result, the liquid is too thick in some areas or the flow is uneven, which reduces the gas-liquid contact area or the heat transfer is uneven, thus affecting the mass and heat transfer efficiency and reducing the distillation purity and efficiency of MCPP propionic acid.

[0004] Therefore, there is an urgent need for a continuous distillation unit in the production of MCPP propionic acid to solve the above problems. Utility Model Content

[0005] To achieve the above objectives, this utility model provides the following technical solution: a continuous distillation device for MCPP propionic acid production, comprising a base and a distillation column and a condensation column disposed on the base. The base is further provided with a reboiler for providing heat and gas-phase power for the distillation process of the MCPP propionic acid mixture. The reboiler is connected to the distillation column. The distillation column is provided with a tray. A storage tank and a cooling tank are respectively disposed on opposite sides of the distillation column and the condensation column. The storage tank, under the action of a high-pressure delivery pump, delivers the MCPP propionic acid mixture to the distillation column through a delivery pipe. The cooling tank, under the action of a circulating pump, delivers the cooling liquid to the condensation column through a cooling pipe. A vaporization pipe is provided at the top of the distillation column. The vaporization pipe spiral is disposed in the condensation column and a liquid outlet control valve is provided at one end penetrating the condensation column. The device also includes a dispersion component disposed in the distillation column for dispersing the MCPP propionic acid mixture output.

[0006] The dispersion assembly includes a fixed ring fixedly connected to the inner wall of the distillation column, the fixed ring being located above the column tray. A dispersion hollow ring is connected to the side of the fixed ring away from the column tray via a positioning assembly. The end of the delivery pipe away from the high-pressure delivery pump is connected to the dispersion hollow ring via a connecting assembly. Two corrugated pipes symmetrically arranged are fixedly connected to the inner wall of the dispersion hollow ring. The ends of the two corrugated pipes that are far apart from each other are connected to the dispersion hollow ring. An L-shaped liquid outlet pipe is fixedly connected to the ends of the two corrugated pipes that are close to each other. The fixed ring is provided with a driving assembly for driving the two L-shaped liquid outlet pipes.

[0007] The connecting assembly includes a connecting hole opened on the side of the dispersed hollow ring away from the bellows, and a connecting ring is rotatably connected to the connecting hole. One end of the conveying pipe is connected to the connecting ring.

[0008] The positioning component includes an annular dovetail groove formed on the side of the fixed ring near the dispersing hollow ring, and an annular dovetail plate is rotatably connected to the annular dovetail groove. One end of the annular dovetail plate is connected to the dispersing hollow ring.

[0009] The driving assembly includes multiple driving plates arranged in a ring array and fixedly connected to the inner wall of the fixed ring. Each driving plate has two inclined surfaces on its opposite sidewalls. The distillation column is equipped with a rotating assembly for rotating two L-shaped liquid outlet pipes. Under the rotation of the rotating assembly, the two L-shaped liquid outlet pipes abut against the inclined sidewalls. The dispersing hollow ring is equipped with a resetting assembly for resetting the two L-shaped liquid outlet pipes after driving.

[0010] The reset assembly includes two symmetrically arranged reset rods fixedly connected to the inner wall of the dispersion hollow ring. The two reset rods are located on both sides of the L-shaped liquid outlet pipe. Four reset plates are slidably connected to the side walls of the two reset rods. The two opposite reset plates are connected to the L-shaped liquid outlet pipe. An installation ring is fixedly connected to the middle side wall of the two reset rods. Four springs are sleeved on the side walls of the two reset rods. The two ends of the four springs are respectively connected to the installation ring and the inner wall of the dispersion hollow ring.

[0011] The rotating assembly includes a mounting base plate fixedly connected to the side wall of the distillation column. A motor is fixedly connected to the side of the mounting base plate away from the distillation column. A rotating rod is fixedly connected to the output end of the motor. The end of the rotating rod away from the motor is located inside the distillation column and is fixedly connected to a gear. A gear ring is fixedly connected to the side of the dispersing hollow ring away from the fixed ring. The gear ring and the gear are meshed with each other.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention, through the arrangement of a dispersion component, and with the combined action of the driving and resetting components, allows the MCPP propionic acid mixture to flow to the tray at different locations, thereby improving the uniformity of the MCPP propionic acid mixture discharge. This reduces the risk of local accumulation or flow deviation on the tray due to the high viscosity of the MCPP propionic acid mixture and the single discharge location, thus increasing the gas-liquid contact area or the balance of heat transfer, thereby improving the mass and heat transfer efficiency, and ultimately improving the distillation purity and efficiency of MCPP propionic acid. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of the condenser tower of this utility model;

[0016] Figure 3 This is a schematic diagram of the internal structure of the distillation column of this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the distributed component of this utility model;

[0018] Figure 5 This is a schematic diagram of the drive component and reset component of this utility model;

[0019] Figure 6 This is a schematic diagram of the connection component and positioning component of this utility model;

[0020] Figure 7 for Figure 6 Enlarged view of point A in the middle.

[0021] In the diagram: 101, base; 102, distillation column; 103, condenser; 104, storage tank; 105, cooling tank; 106, delivery pipe; 107, cooling pipe; 108, vaporization pipe; 109, reboiler; 110, tray; 201, fixing ring; 202, dispersion hollow ring; 203, bellows; 204, L-shaped outlet pipe; 301, connecting hole; 302, connecting ring; 401, annular dovetail groove; 402, annular dovetail plate; 501, drive plate; 502, inclined plane; 601, reset rod; 602, reset plate; 603, mounting ring; 604, spring; 701, mounting base plate; 702, motor; 703, gear; 704, gear ring. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1

[0024] Please see Figures 1-7 The diagram shows a continuous distillation apparatus for MCPP propionic acid production, including a base 101 and a distillation column 102 and a condenser column 103 disposed on the base 101. The base 101 also includes a reboiler 109 for providing heat and gas-phase power for the distillation process of the MCPP propionic acid mixture. The reboiler 109 is connected to the distillation column 102. The distillation column 102 has trays 110. A storage tank 104 and a cooling tank 105 are respectively located on opposite sides of the distillation column 102 and the condenser column 103. Under the action of a high-pressure delivery pump, the MCPP propionic acid mixture is delivered to the distillation tower 102 through the delivery pipe 106. Under the action of a circulation pump, the cooling tank 105 delivers the cooling liquid to the condensation tower 103 through the cooling pipe 107. The top of the distillation tower 102 is provided with a vaporization pipe 108, and the spiral of the vaporization pipe 108 is located in the condensation tower 103. A liquid outlet control valve is provided at one end of the condensation tower 103. The distillation tower 102 also includes a dispersion component for dispersing the MCPP propionic acid mixture.

[0025] The dispersion assembly includes a fixed ring 201 fixedly connected to the inner wall of the distillation column 102. The fixed ring 201 is located above the tray 110. The side of the fixed ring 201 away from the tray 110 is connected to a dispersion hollow ring 202 through a positioning assembly. The end of the delivery pipe 106 away from the high-pressure delivery pump is connected to the dispersion hollow ring 202 through a connecting assembly. Two corrugated pipes 203 are fixedly connected to the inner wall of the dispersion hollow ring 202. The ends of the two corrugated pipes 203 that are far apart from each other are connected to the dispersion hollow ring 202. The ends of the two corrugated pipes 203 that are close to each other are fixedly connected to an L-shaped liquid outlet pipe 204. The fixed ring 201 is provided with a driving assembly for driving the two L-shaped liquid outlet pipes 204.

[0026] It should be noted that by setting up the dispersion component, the MCPP propionic acid mixture flows to the tray 110 at different locations under the combined action of the drive component and the reset component. This improves the uniformity of the MCPP propionic acid mixture discharge and reduces the risk of local accumulation or flow deviation on the tray 110 due to the high viscosity of the MCPP propionic acid mixture and the single discharge location. This increases the gas-liquid contact area or the balance of heat transfer, thereby improving the mass and heat transfer efficiency and thus improving the distillation purity and efficiency of MCPP propionic acid.

[0027] It is worth noting that the continuous distillation of MCPP propionic acid is an existing technology, and its specific structural components and working principle have been mastered by those in the field, so it will not be elaborated on here.

[0028] Please see Figure 6 and Figure 7 The connecting component shown in the figure includes a connecting hole 301 opened on the side of the dispersion hollow ring 202 away from the bellows 203, a connecting ring 302 rotatably connected to the connecting hole 301, and one end of the conveying pipe 106 connected to the connecting ring 302.

[0029] It should be noted here that the connection components are configured to allow the conveying pipe 106 to be rotatably connected to the dispersing hollow ring 202.

[0030] Please see Figure 6 and Figure 7 The positioning component shown in the figure includes an annular dovetail groove 401 opened on the side of the fixed ring 201 near the dispersing hollow ring 202. The annular dovetail groove 401 is rotatably connected to an annular dovetail plate 402, and one end of the annular dovetail plate 402 is connected to the dispersing hollow ring 202.

[0031] It should be noted here that the positioning component is used to guide and limit the rotation of the hollow ring 202.

[0032] Please see Figure 5 and Figure 6 The driving assembly shown in the figure includes multiple driving plates 501 arranged in a ring array and fixedly connected to the inner wall of the fixed ring 201. Each driving plate 501 has two opposite side walls with inclined surfaces 502. The distillation column 102 is provided with a rotating assembly for rotating two L-shaped liquid outlet pipes 204. Under the rotation of the rotating assembly, the two L-shaped liquid outlet pipes 204 abut against the side walls of each inclined surface 502. The dispersion hollow ring 202 is provided with a reset assembly for resetting the two L-shaped liquid outlet pipes 204 after driving.

[0033] It should be noted here that the drive component is configured to move the L-shaped outlet pipe 204.

[0034] Please see Figure 5 and Figure 6 The reset assembly shown in the figure includes two symmetrically arranged reset rods 601 fixedly connected to the inner wall of the dispersion hollow ring 202. The two reset rods 601 are located on both sides of the L-shaped liquid outlet pipe 204. Four reset plates 602 are slidably connected to the side walls of the two reset rods 601. The two opposite reset plates 602 are connected to the L-shaped liquid outlet pipe 204. An installation ring 603 is fixedly connected to the middle side wall of the two reset rods 601. Four springs 604 are sleeved on the side walls of the two reset rods 601. The two ends of the four springs 604 are respectively connected to the installation ring 603 and the inner wall of the dispersion hollow ring 202.

[0035] It should be noted here that the reset component is designed to guide and reset the movement of the L-shaped outlet tube 204.

[0036] Working principle: When distilling MCPP propionic acid, a high-pressure transfer pump is first used to transport the MCPP propionic acid mixture to the distillation column 102. Then, the liquid at the bottom of the column is heated by the reboiler 109, causing it to partially vaporize. The generated vapor rises along the column. Since the boiling points of MCPP propionic acid and other components (such as unreacted raw materials, by-products, etc.) are different, the components with lower boiling points are more easily vaporized during the heating process, and their concentration in the gas phase gradually increases. The rising vapor and the falling liquid have sufficient gas-liquid contact at the column plate 110. At the gas-liquid interface, the non-volatile components (high-boiling-point components) in the gas phase will partially transfer to the liquid phase, while the volatile components (low-boiling-point components, such as MCPP propionic acid) in the liquid phase will partially transfer to the gas phase, realizing the transfer of mass and the separation of components. Through the mass transfer process of the column plate 110, MCPP propionic acid is enriched at the top of the column, while high-boiling-point impurities accumulate at the bottom of the column.

[0037] The vapor exiting from the top of distillation column 102 enters condensation column 103 through vaporization pipe 108, where it is cooled and condensed into liquid. (Due to different effects of the distillation process, a portion of the liquid returns to the top of distillation column 102 as reflux liquid, continuing gas-liquid mass transfer with the rising vapor to ensure the separation effect within the column; the other portion is collected as the top product, yielding high-purity MCPP propionic acid or a fraction containing MCPP propionic acid.) The liquid at the bottom of distillation column 102 is discharged through the bottom discharge pipe, containing high-boiling-point impurities and potentially unreacted raw materials. The high-purity MCPP propionic acid or a fraction containing MCPP propionic acid separated by distillation flows out from the liquid outlet control valve at one end of vaporization pipe 108. Therefore, by continuously conveying the MCPP propionic acid mixture through a high-pressure delivery pump, continuous distillation of MCPP propionic acid can be achieved. (Continuous distillation of MCPP propionic acid is existing technology; its specific structural components and working principle are well understood by those skilled in the art and will not be elaborated upon here.)

[0038] Furthermore, when the MCPP propionic acid mixture is conveyed from the delivery pipe 106 into the tower, it will enter the dispersion hollow ring 202. Under pressure, it will flow from the L-shaped outlet pipes 204 at one end of the two corrugated pipes 203 to the tower plate 110. When the MCPP propionic acid mixture flows out of the L-shaped outlet pipes 204, the rotating component drives the dispersion hollow ring 202 to rotate, which in turn drives the L-shaped outlet pipes 204 at one end of the two corrugated pipes 203 to rotate synchronously. During the rotation of the two L-shaped outlet pipes 204, when the L-shaped outlet pipes 204 abut against the inclined surface 502 on the side wall of the drive plate 501, under the interaction force and the guiding action of the reset component, the L-shaped outlet pipes 204 will be pushed away from the inner wall of the dispersion hollow ring 202. When the L-shaped outlet pipes 204 pass the drive plate 501, they will move away from the inner wall of the dispersion hollow ring 202. At 01, under the resetting action of the resetting component, the L-shaped liquid outlet pipe 204 will move closer to the inner wall of the dispersion hollow ring 202. As the L-shaped liquid outlet pipe 204 rotates continuously, the driving component and the resetting component will cause the L-shaped liquid outlet pipe 204 to reciprocate towards or away from the inner wall of the dispersion hollow ring 202. This will cause the MCPP propionic acid mixture to flow to the tray 110 at different locations, improving the uniformity of the MCPP propionic acid mixture discharge. This will reduce the risk of local accumulation or flow deviation on the tray 110 due to the high viscosity of the MCPP propionic acid mixture and the single discharge location. This will increase the gas-liquid contact area or the balance of heat transfer, thereby improving the mass and heat transfer efficiency and ultimately improving the distillation purity and efficiency of MCPP propionic acid.

[0039] Example 2

[0040] Please see Figure 4 and Figure 5 This embodiment further illustrates Example 1. The rotating assembly shown in the figure includes a mounting base plate 701 fixedly connected to the side wall of the distillation column 102. A motor 702 is fixedly connected to the side of the mounting base plate 701 away from the distillation column 102. A rotating rod is fixedly connected to the output end of the motor 702. The end of the rotating rod away from the motor 702 is located inside the distillation column 102 and is fixedly connected to a gear 703. A gear ring 704 is fixedly connected to the side of the dispersion hollow ring 202 away from the fixed ring 201. The gear ring 704 and the gear 703 are meshed with each other.

[0041] It should be noted that: through the setting of the rotating component, the motor 702 (model Y80M1-2, which is existing technology and will not be described in detail here) drives the gear 703 at one end of the rotating rod to rotate. During the rotation of the gear 703, through the meshing transmission between the gear 703 and the gear ring 704 and the guiding and limiting effect of the positioning component, the dispersing hollow ring 202 is driven to rotate, which in turn drives the two L-shaped liquid outlet pipes 204 on the inner wall of the dispersing hollow ring 202 to rotate synchronously.

[0042] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A continuous distillation apparatus for the production of MCPP propionic acid, comprising: The base (101) includes a distillation column (102) and a condenser (103) disposed on the base (101). The base (101) is also provided with a reboiler (109) for providing heat and gas-phase power for the distillation process of the MCPP propionic acid mixture. The reboiler (109) is connected to the distillation column (102). The distillation column (102) is provided with trays (110). A liquid storage tank (104) and a cooling tank (103) are respectively provided on the opposite sides of the distillation column (102) and the condenser (103). 5) The storage tank (104) transports the MCPP propionic acid mixture to the distillation tower (102) through the delivery pipe (106) under the action of the high-pressure delivery pump. The cooling tank (105) transports the coolant to the condensation tower (103) through the cooling pipe (107) under the action of the circulation pump. The top of the distillation tower (102) is provided with a vaporization pipe (108). The spiral of the vaporization pipe (108) is located in the condensation tower (103), and a liquid outlet control valve is provided at one end of the condensation tower (103). Its characteristic is that it further includes: A dispersion component installed in the distillation column (102) for dispersing the MCPP propionic acid mixture output; The dispersion assembly includes a fixing ring (201) fixedly connected to the inner wall of the distillation column (102). The fixing ring (201) is located above the tray (110). The side of the fixing ring (201) away from the tray (110) is connected to a dispersion hollow ring (202) through a positioning assembly. The end of the delivery pipe (106) away from the high-pressure delivery pump is connected to the dispersion hollow ring (202) through a connecting assembly. The inner wall of the dispersion hollow ring (202) is fixedly connected to two corrugated pipes (203) arranged symmetrically. The ends of the two corrugated pipes (203) that are far apart from each other are connected to the dispersion hollow ring (202). The ends of the two corrugated pipes (203) that are close to each other are fixedly connected to an L-shaped liquid outlet pipe (204). The fixing ring (201) is provided with a driving assembly for driving the two L-shaped liquid outlet pipes (204).

2. The continuous distillation apparatus for MCPP propionic acid production according to claim 1, characterized in that: The connecting assembly includes a connecting hole (301) on the side of the dispersed hollow ring (202) away from the bellows (203), the connecting hole (301) is rotatably connected to the connecting ring (302), and one end of the conveying pipe (106) is connected to the connecting ring (302).

3. The continuous distillation apparatus for MCPP propionic acid production according to claim 2, characterized in that: The positioning component includes an annular dovetail groove (401) formed on the side of the fixed ring (201) near the dispersing hollow ring (202). The annular dovetail groove (401) is rotatably connected to an annular dovetail plate (402), and one end of the annular dovetail plate (402) is connected to the dispersing hollow ring (202).

4. The continuous distillation apparatus for MCPP propionic acid production according to claim 3, characterized in that: The driving assembly includes a plurality of driving plates (501) arranged in a ring array and fixedly connected to the inner wall of the fixed ring (201). Each driving plate (501) has two opposite side walls with inclined surfaces (502). The distillation column (102) is provided with a rotating assembly for rotating two L-shaped liquid outlet pipes (204). Under the rotation of the rotating assembly, the two L-shaped liquid outlet pipes (204) abut against the side walls of each inclined surface (502). The dispersing hollow ring (202) is provided with a resetting assembly for resetting the two L-shaped liquid outlet pipes (204) after driving.

5. A continuous distillation apparatus for MCPP propionic acid production according to claim 4, characterized in that: The reset assembly includes two symmetrically arranged reset rods (601) fixedly connected to the inner wall of the dispersion hollow ring (202). The two reset rods (601) are located on both sides of the L-shaped liquid outlet pipe (204). Four reset plates (602) are slidably connected to the side walls of the two reset rods (601). The two opposite reset plates (602) are connected to the L-shaped liquid outlet pipe (204). An installation ring (603) is fixedly connected to the middle side wall of the two reset rods (601). Four springs (604) are sleeved on the side walls of the two reset rods (601). The two ends of the four springs (604) are respectively connected to the installation ring (603) and the inner wall of the dispersion hollow ring (202).

6. A continuous distillation apparatus for MCPP propionic acid production according to claim 5, characterized in that: The rotating assembly includes a mounting base plate (701) fixedly connected to the side wall of the distillation column (102). A motor (702) is fixedly connected to the side of the mounting base plate (701) away from the distillation column (102). A rotating rod is fixedly connected to the output end of the motor (702). The end of the rotating rod away from the motor (702) is located inside the distillation column (102) and is fixedly connected to a gear (703). A gear ring (704) is fixedly connected to the side of the dispersing hollow ring (202) away from the fixed ring (201). The gear ring (704) and the gear (703) are meshed with each other.

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