Rectifier for producing 3, 4-dihydroxy-1-butene
By using spray packing and independent exhaust tanks in the distillation tower, and setting up horizontal partitions and multiple exhaust holes in the exhaust tank, the problems of reduced airflow and low separation rates in the existing distillation tower are solved, and more efficient improvements in the exchange and separation rates of airflow and agents are achieved.
Patent Information
- Application Number
- CN202420554270.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-21
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-03-21
AI Technical Summary
In the production process of 3,4-dihydroxy-1-butene, the gas flow and separation rate are reduced due to the arrangement of the exhaust tank. When the liquid contacting plate is overflowing, the agent is prone to fall through the exhaust tank, further reducing the separation rate.
A 3,4-dihydroxy-1-butene production is designed, using spray filler and independent exhaust tanks, and a horizontal partition and multiple exhaust holes are provided in the exhaust tank. The adjacent layer tower tray is rotated 180° to stagger the exhaust tank position, ensuring that the airflow exchanges components normally and releases pressure when necessary.
Through spraying filler and optimized exhaust tank design, the exchange efficiency between the airflow and the agent is improved, the agent is avoided from entering the exhaust tank, the separation rate is enhanced, and the pressure relief effect is provided when the pressure is too high, ensuring the stability of the distillation process.
Smart Images
Figure CN222566843U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of chemical equipment, in particular to a rectifier for producing 3,4-dihydroxy-1-butene. Background Art
[0002] 3,4-dihydroxy-1-butene is an important chemical raw material in the lithium battery industry. It is mainly obtained by rearrangement of 1,4-butenediol by isomerization reaction under the catalysis of a catalyst. Since it is a catalytic reaction, it is impossible to convert all 1,4-butenediol. The finished product will contain unconverted 1,4-butenediol. 3,4-dihydroxy-1-butene and 1,4-butenediol have similar chemical properties and similar boiling points, so conventional extraction and distillation separation are difficult to complete. At present, rectifiers are mostly used for separation. Taking the distillation tower as an example, the distillation tower is a tower-type vapor-liquid contact device for distillation. By utilizing the different volatilities of the components in the mixture, that is, the different vapor pressures of the components at the same temperature, the light components (low boiling substances) in the liquid phase are transferred to the gas phase, and the heavy components (high boiling substances) in the gas phase are transferred to the liquid phase.
[0003] Since the distillation tower requires gas-liquid countercurrent, exhaust grooves are set on the same side of each tray for gas upward circulation (if there is no exhaust groove, all airflow will pass through the packing, and the pressure resistance is very large), but the setting of the exhaust groove will also cause a problem. Most of the airflow flows directly upward from the exhaust groove, so the airflow through the packing will be greatly reduced. And once the liquid receiving tray overflows, it will fall directly through the exhaust groove, thereby reducing the separation rate. Utility Model Content
[0004] The technical problem to be solved by the utility model is to provide a rectifier for producing 3,4-dihydroxy-1-butene, so as to solve the technical problems in the above-mentioned background technology.
[0005] In order to solve the above technical problems, the technical solution of the utility model is:
[0006] A rectifier for producing 3,4-dihydroxy-1-butene comprises at least a tower body and tower plates installed at multiple layers in the tower body, wherein the top side of the tower plate is provided with a liquid receiving tray, the peripheral walls of the liquid receiving tray are provided with water retaining plates, an independent exhaust groove is provided on one side of the liquid receiving tray, the bottom of the exhaust groove is provided with a horizontal partition plate, and a plurality of exhaust holes are distributed on the horizontal partition plate; the center of the liquid receiving tray is a through groove, the lower side of the through groove is connected with a fixed sleeve, and a spray filler is installed in the fixed sleeve; a plurality of overflow pipes are distributed on the receiving tray at the periphery of the through groove, the pipe openings of the overflow pipes are lower than the water retaining plates, and spray heads are installed at the bottom ends of the overflow pipes; the tower plates of adjacent layers are rotated 180 degrees so that the positions of the exhaust grooves are symmetrically staggered.
[0007] Furthermore, the water baffle and the outer peripheral wall of the liquid receiving tray are an integral cylindrical shape, the horizontal partition and the liquid receiving tray are an integral whole, and the exhaust groove and the liquid receiving tray are divided by the vertical partition to form two separate areas.
[0008] Furthermore, the sprinkler head is hemispherical.
[0009] Furthermore, the spray filler is ceramic filler balls or foamed metal nickel filler.
[0010] Furthermore, when the spray filler is a foamed metal nickel filler, a circle of clamping rings protruding toward the center is provided at the bottom of the fixing sleeve to support the spray filler.
[0011] Advantages of the utility model:
[0012] (1) In the present invention, the spray filler is fixed in the fixed sleeve, and the projection area of the fixed sleeve is completely covered by the liquid receiving tray, which can prevent the medicine falling from the upper tower tray from entering the exhaust groove area.
[0013] (2) The utility model sets a horizontal partition in the exhaust groove and opens a plurality of exhaust holes, thereby forming a large air resistance, so that the air flow can normally go up from most of the spray filler, thereby exchanging components with the reagent. When the pressure is too high, the exhaust holes can also play a role in pressure relief.
[0014] (3) The setting of overflow pipe and sprinkler head can maintain good gas-liquid exchange while draining liquid in an emergency.
[0015] (4) The adjacent layers of the tower plates are rotated 180° so that the exhaust slots are symmetrically staggered. This way, even the excess airflow will pass under the spray packing, thereby improving the exchange and separation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the structure of the utility model;
[0017] Figure 2 It is a schematic diagram of the three-dimensional structure of the tower plate;
[0018] Figure 3 This is a cross-sectional view of the tower plate.
[0019] In the figure, 1-tower body, 2-tower plate, 21-liquid receiving plate, 211-through groove, 212-fixing sleeve, 213-clamping ring, 22-exhaust groove, 221-horizontal partition, 222-exhaust hole, 23-vertical partition, 3-overflow pipe, 31-spray head, 4-spray filler. DETAILED DESCRIPTION
[0020] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each implementation method of the present invention described below can be combined with each other as long as they do not conflict with each other.
[0021] As shown in the figure:
[0022] A rectifier for producing 3,4-dihydroxy-1-butene comprises at least a tower body 1 and tower trays 2 installed in multiple layers in the tower body 1, wherein the top side of the tower tray 2 is provided with a liquid receiving tray 21, the peripheral walls of the liquid receiving tray 21 are provided with water retaining plates, an independent exhaust groove 22 is provided on one side of the liquid receiving tray 21, the bottom of the exhaust groove 22 is provided with a horizontal partition 221, and a plurality of exhaust holes 222 are distributed on the horizontal partition 221; the center of the liquid receiving tray 21 is a through groove 211, the lower side of the through groove 211 is connected with a fixed sleeve 212, and a spray filler 4 is installed in the fixed sleeve 212; a plurality of overflow pipes 3 are distributed on the receiving tray at the periphery of the through groove 211, the pipe openings of the overflow pipes 3 are lower than the water retaining plates, and spray heads 31 are installed at the bottom ends of the overflow pipes 3; the tower trays 2 of adjacent layers are rotated 180 degrees so that the positions of the exhaust grooves 22 thereof are symmetrically staggered.
[0023] The utility model mainly improves the structure of the tower plate 2 of the distillation device, and the remaining undescribed parts of the tower body 1 can be matched with the existing technology. Different from the existing technology, the spray filler 4 in the utility model is fixed in the fixed sleeve 212, and the projection area of the fixed sleeve 212 is completely covered by the liquid receiving tray 21, which can prevent the medicine falling from the upper tower plate 2 from entering the exhaust groove 22 area.
[0024] In order to ensure that the airflow goes up from the spray filler 4 as much as possible, the utility model sets a horizontal partition 221 in the exhaust groove 22 and opens a plurality of exhaust holes 222, thereby forming a larger air resistance, so that the airflow can go up from most of the spray filler 4 under normal circumstances, thereby exchanging components with the medicine. When the airflow is large, or the spray filler 4 is blocked, the exhaust holes 222 can play a key pressure relief role at this time, avoiding the airflow from going up quickly from the spray filler 4, causing the liquid receiving tray 21 to overflow, and avoiding overflow into the exhaust groove 22.
[0025] However, in order to prevent overflow, a plurality of overflow pipes 3 are distributed on the outer periphery of the through groove 211 on the receiving plate of the utility model. The pipe mouth of the overflow pipe 3 is lower than the water baffle, and a spray head 31 is installed at the bottom end of the overflow pipe 3. In this way, once the liquid level does not rise normally to the pipe mouth of the overflow pipe 3, the overflow pipe 3 will quickly discharge it downward, but in the process of downward discharge, it will still be dispersed into droplets through the spray head 31, thereby exchanging with the airflow. It is best that the spray head 31 is hemispherical, as the hemispherical diffusion effect is relatively good.
[0026] In order to increase the exchange effect between the liquid phase and the gas phase, the adjacent layer trays 2 in the utility model are rotated 180 degrees so that the exhaust slots 22 are symmetrically staggered, so that even excess airflow will pass under the spray filler 4, thereby improving the exchange and separation efficiency.
[0027] As an optimized solution, the water retaining plate and the outer peripheral wall of the liquid receiving pan 21 are an integral cylindrical shape, the horizontal partition 221 is an integral part of the liquid receiving pan 21, and the exhaust groove 22 and the liquid receiving pan 21 are divided by the vertical partition 23 to form two separate areas.
[0028] The spray filler 4 is made of ceramic filler balls or foamed metal nickel filler. If foamed metal nickel filler is used, since it is a whole, in order to facilitate disassembly and assembly, the bottom of the fixed sleeve 212 has a circle of clamping ring 213 protruding toward the center to support the spray filler 4. If ceramic filler balls are used, the clamping ring 213 can be replaced with an isolation net.
[0029] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.
Claims
1. A rectifier for producing 3,4-dihydroxy-1-butene, characterized in that: The tower plate comprises at least a tower body and tower plates installed at multiple layers in the tower body, wherein a liquid receiving tray is provided on the top side of the tower plate, water retaining plates are provided on the peripheral walls of the liquid receiving tray, an independent exhaust groove is provided on one side of the liquid receiving tray, a horizontal partition is provided at the bottom of the exhaust groove, and a plurality of exhaust holes are distributed on the horizontal partition; a through groove is provided at the center of the liquid receiving tray, a fixed sleeve is connected to the lower side of the through groove, and a spray filler is installed in the fixed sleeve; a plurality of overflow pipes are distributed on the outer periphery of the through groove on the receiving tray, the pipe openings of the overflow pipes are lower than the water retaining plates, and spray heads are installed at the bottom ends of the overflow pipes; the tower plates of adjacent layers are rotated 180° so that the positions of the exhaust grooves are symmetrically staggered.
2. The rectifier for producing 3,4-dihydroxy-1-butene according to claim 1, characterized in that: The water baffle and the outer peripheral wall of the liquid receiving tray are in an integrated cylindrical shape, the horizontal partition is integrated with the liquid receiving tray, and the exhaust groove and the liquid receiving tray are divided by the vertical partition to form two separate areas.
3. The rectifier for producing 3,4-dihydroxy-1-butene according to claim 1, characterized in that: The shower head is hemispherical.
4. The rectifier for producing 3,4-dihydroxy-1-butene according to claim 1, characterized in that: The spray filler is ceramic filler balls or foamed metal nickel filler.
5. The rectifier for producing 3,4-dihydroxy-1-butene according to claim 4, characterized in that: When the spray filler is a foamed metal nickel filler, a circle of clamping rings protruding toward the center is provided at the bottom of the fixed sleeve to support the spray filler.