A high-purity purification device for ethyl acetate

Abstract

The present invention belongs to the technical field of ethyl acetate purification, and discloses a high-purity purification device for ethyl acetate, comprising a stationary tank, the surface of which is also provided with a feed pipe, a first discharge port and a second discharge port, and further comprising a flow stabilizing component, the flow stabilizing component being installed on the top of the inner cavity of the stationary tank, and the flow stabilizing component comprising a flow stabilizing platform. In the present invention, when a mixed liquid of ethyl acetate and water enters the inner part of the stationary tank from the feed pipe, it is guided by a first guide groove, a second guide groove and a third guide groove, thereby reducing the flow velocity of the mixed liquid of ethyl acetate and water when entering the inner part of the stationary tank, so that the mixed liquid flows slowly and gradually enters a stable laminar flow state, and the first telescopic rod, a pressure rod and a second telescopic rod are provided to drain the mixed liquid, reduce the vibration caused by the falling of the mixed liquid, so that the mixed liquid can fall into the inner cavity of the stationary tank in a relatively gentle state, thereby improving the efficiency of stratification.

Description

Technical Field

[0001] The invention belongs to the technical field of ethyl acetate purification, in particular to high-purity ethyl acetate purification equipment. Background Art

[0002] In the esterification process for producing ethyl acetate, ethyl acetate generated by the reaction of acetic acid and ethanol in the esterification kettle, carries the generated water and part of the raw material ethanol, and rises to the top of the esterification tower in the form of a ternary azeotrope. After condensation, the mixed liquid is separated into layers by a phase separator, and the upper layer of ethyl acetate overflows into the crude ester tank, and the lower layer of water is sent to the wastewater recovery system, because the water content in the ternary azeotrope of ethyl acetate, ethanol and water is less than 9%, while the water content in the chemical amount of ethyl acetate and water produced by the reaction of acetic acid and ethanol is about 17%.

[0003] In the prior art, for example, the invention patent with application number CN202211038347.6 discloses a high-purity ethyl acetate purification device and a purification method thereof. By setting a standing tank, the mixed liquid of ethyl acetate and water flowing out of the ethyl acetate recovery tower can be directly stood and separated, thereby preventing the mixed liquid of ethyl acetate and water and the separated water from flowing back into the ethyl acetate recovery tower to increase the reflux ratio, thereby reducing production energy consumption. The buoyancy sealing mechanism can automatically determine the stratification interface and cut off the seal, thereby improving the purity of ethyl acetate.

[0004] However, the buoyancy sealing mechanism inside the standing tank needs to be manually locked after standing, which is inconvenient. In addition, the ethyl acetate and the mixture of ethyl acetate and water that enter the standing tank collide with the buoyancy plate and spread outward, and the separation speed of ethyl acetate and water is accelerated by the generated vibration. In fact, when standing, the vibration will produce a stirring effect, interfere with the stratification process, and then reduce the speed of standing separation. Therefore, improvements are made to the above problems. Summary of the invention

[0005] In order to solve the problems raised in the above background technology, the present invention provides a high-purity purification device for ethyl acetate.

[0006] To achieve the above object, the present invention provides the following technical solution: a high-purity ethyl acetate purification device, comprising a static tank, the surface of which is also provided with a feed pipe, a first discharge port and a second discharge port, and further comprising:

[0007] A flow stabilizing component, the flow stabilizing component is installed on the top of the inner cavity of the static tank, the flow stabilizing component includes a flow stabilizing platform, the top of the flow stabilizing platform is provided with a first flow guide groove, which is used to stabilize the flow of the mixed liquid of ethyl acetate and water;

[0008] A first telescopic rod, wherein the first telescopic rod is annularly arranged at the bottom of the flow stabilizing assembly;

[0009] A first flow diversion component, wherein the first flow diversion component is connected to the flow stabilizing component through a first telescopic rod, the first flow diversion component comprises a first flow diversion platform, and a second flow guide groove is arranged on the top of the first flow diversion platform;

[0010] A second flow diverter assembly, the second flow diverter assembly is movable below the first flow diverter assembly, the second flow diverter assembly comprises a second flow diverter platform, a connecting piece and a limiting rod, a third flow guide groove is arranged on the top of the second flow diverter platform, the limiting rod is fixedly installed on the top of the second flow diverter platform, and the limiting rod is slidably connected to the first flow diverter platform through the connecting piece;

[0011] A movable component is connected to the bottom of the inner cavity of the static tank to support the second diversion component.

[0012] Preferably, the flow stabilizing assembly further comprises a flow limiting baffle and a first connecting block, wherein the flow limiting baffle is mounted on the outer edge of the flow stabilizing platform and is fixedly connected to the inner cavity of the stationary tank, and the first connecting block is fixedly connected to the flow limiting baffle.

[0013] Preferably, the first telescopic rod passes through the flow stabilizing platform and is fixedly connected to the first connecting block, and a gap is provided between the flow stabilizing platform and the first telescopic rod.

[0014] Preferably, the first diversion assembly also includes a tilting rod, an extrusion ring and an elastic seal, the tilting rod is rotatably connected to the inside of the first diversion platform, the elastic seal is sleeved on the outside of the first diversion platform, the extrusion ring is arranged on the top of the elastic seal and can press down the elastic seal through the extrusion ring when the tilting rod rotates.

[0015] Preferably, the second diverter assembly further comprises a pressure rod, which is mounted on the top of the second diverter platform and can pass through the bottom of the second diverter platform and squeeze the tilting rod.

[0016] Preferably, the bottom of the first diverter platform is further provided with a groove matched with the third guide groove on the top of the second diverter platform.

[0017] Preferably, the specific gravity of the first diverter is less than that of water and greater than that of ethyl acetate, and the specific gravity of the second diverter is less than that of water and greater than that of a mixture of ethyl acetate and water.

[0018] Preferably, the movable component includes a second telescopic rod and a second connecting block, the second telescopic rod is fixedly connected to the second diverter table through the second connecting block, and the bottom of the second telescopic rod is fixedly connected to the bottom of the inner cavity of the stationary tank.

[0019] Preferably, a gap is provided between the second telescopic rod and the second diverter platform.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. In the present invention, when the mixed liquid of ethyl acetate and water enters the interior of the static tank from the feed pipe, it is guided through the first guide groove on the surface of the flow stabilizing platform, the second guide groove on the top of the first diverter platform, and the third guide groove on the top of the second diverter platform, thereby reducing the flow rate of the mixed liquid of ethyl acetate and water when entering the interior of the static tank, so that the mixed liquid flows slowly and gradually enters a stable laminar flow state. The first telescopic rod, the pressure rod and the second telescopic rod are arranged to drain the mixed liquid, reduce the vibration caused by the falling of the mixed liquid, so that the mixed liquid can fall into the inner cavity of the static tank in a relatively gentle state, thereby improving the efficiency of stratification.

[0022] 2. In the present invention, the specific gravity of the first diverter and the second diverter are both smaller than that of water, so they both float on the water. However, the first diverter is located below the ethyl acetate and above the mixed liquid, while the second diverter is located below the mixed liquid. In this way, the first diverter and the second diverter are distributed up and down to wrap the mixed liquid, and form pressure contact after the mixed liquid is layered. In this way, the contact between the ethyl acetate and water is reduced after the two are layered, thereby improving the separation effect.

[0023] 3. The present invention forms a lever structure through a tilting rod. When the pressure rod moves upward, the end of the tilting rod away from the extrusion ring is squeezed, which can press the elastic seal downward with less effort. The movement of the elastic seal can be achieved only by buoyancy, and the isolation of the ethyl acetate and water layers can be achieved by the downward movement of the elastic seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the present invention;

[0025] Figure 2 It is a structural cross-sectional view of the static tank of the present invention;

[0026] Figure 3 It is a structural cross-sectional view of the flow stabilizing component of the present invention;

[0027] Figure 4 A structural subdivision diagram of the first flow diversion component and the second flow diversion component of the present invention;

[0028] Figure 5 It is a structural coordination diagram of the first flow diversion component and the second flow diversion component of the present invention;

[0029] Figure 6 It is a structural breakdown diagram of the active components of the present invention.

[0030] In the figure: 1. standing tank; 2. feed pipe; 3. first discharge port; 4. second discharge port; 5. flow stabilizing assembly; 501. flow stabilizing platform; 502. flow limiting baffle; 503. first connecting block; 6. first telescopic rod; 7. first diversion assembly; 701. first diversion platform; 702. tilting rod; 703. extrusion ring; 704. elastic sealing member; 8. second diversion assembly; 801. second diversion platform; 802. connecting member; 803. limiting rod; 804. pressure rod; 9. movable assembly; 901. second telescopic rod; 902. second connecting block. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0032] like Figures 1 to 6 As shown, the present invention provides a high-purity purification device for ethyl acetate, comprising a stationary tank 1, the surface of which is further provided with a feed pipe 2, a first discharge port 3 and a second discharge port 4, and further comprising a flow stabilizing component 5, the flow stabilizing component 5 is installed on the top of the inner cavity of the stationary tank 1, the flow stabilizing component 5 comprises a flow stabilizing platform 501, the top of the flow stabilizing platform 501 is provided with a first flow guide groove for stabilizing the flow of a mixed solution of ethyl acetate and water; a first telescopic rod 6, the first telescopic rod 6 is annularly arranged at the bottom of the flow stabilizing component 5; a first flow diversion component 7, the first flow diversion component 7 is connected to the flow stabilizing component 5 through the first telescopic rod 6, the first flow diversion component 7 is connected to the flow stabilizing component 5 through the first telescopic rod 6, and the first flow diversion component 7 is connected to the flow stabilizing component 5 through the first telescopic rod 6. Component 7 includes a first diverter platform 701, and a second guide groove is arranged on the top of the first diverter platform 701; a second diverter component 8, which is movable below the first diverter component 7, and the second diverter component 8 includes a second diverter platform 801, a connecting component 802 and a limiting rod 803, and a third guide groove is arranged on the top of the second diverter platform 801, and the limiting rod 803 is fixedly installed on the top of the second diverter platform 801, and the limiting rod 803 is slidably connected to the first diverter platform 701 through the connecting component 802; a movable component 9, which is connected to the bottom of the inner cavity of the static tank 1 to support the second diverter component 8.

[0033] The flow stabilizing platform 501 can guide the mixed liquid of ethyl acetate and water through the first guide groove on the surface when it enters the static tank 1 from the feed pipe 2, thereby reducing the flow velocity of the mixed liquid of ethyl acetate and water when it enters the static tank 1, so that the mixed liquid flows slowly and gradually enters a stable laminar flow state. The first telescopic rod 6 can drain the mixed liquid and reduce the vibration caused by the falling of the mixed liquid. The second guide groove on the top of the first diversion platform 701 and the third guide groove on the top of the second diversion platform 801 also play a role in reducing the flow velocity, so that the mixed liquid can fall into the inner cavity of the static tank 1 in a relatively gentle state, thereby improving the efficiency of stratification. The first telescopic rod 6 is connected to the bottom of the flow stabilizing platform 501, and can position the first diversion component 7. The movable component 9 positions the second diversion component 8 on the premise of playing a diversion role.

[0034] like Figure 3 As shown, the flow stabilizing assembly 5 also includes a flow limiting baffle 502 and a first connecting block 503 . The flow limiting baffle 502 is installed on the outer edge of the flow stabilizing platform 501 and is fixedly connected to the inner cavity of the static tank 1 . The first connecting block 503 is fixedly connected to the flow limiting baffle 502 .

[0035] The set flow limiting baffle 502 fixes the flow stabilizing platform 501 and also limits the first telescopic rod 6 at the bottom. The flow stabilizing platform 501 and the flow limiting baffle 502 cooperate to form a "V" shape, which can allow the mixed liquid to be drained through the first telescopic rod 6, preventing the mixed liquid droplets from splashing directly when the mixed liquid falls on the top of the flow stabilizing platform 501.

[0036] like Figure 3 As shown, the first telescopic rod 6 passes through the flow stabilizing platform 501 and is fixedly connected to the first connecting block 503 , and a gap is provided between the flow stabilizing platform 501 and the first telescopic rod 6 .

[0037] The gap between the flow stabilizing platform 501 and the first telescopic rod 6 is used to pass the mixed liquid, so that the mixed liquid can only fall along the surface of the first telescopic rod 6, which can effectively reduce the vibration and disturbance effects caused by natural falling, thereby improving the stratification efficiency.

[0038] like Figure 4 and Figure 5 As shown, the first diversion component 7 also includes a tilting rod 702, an extrusion ring 703 and an elastic seal 704. The tilting rod 702 is rotatably connected to the inside of the first diversion platform 701, and the elastic seal 704 is sleeved on the outside of the first diversion platform 701. The extrusion ring 703 is arranged on the top of the elastic seal 704 and the tilting rod 702 can press down the elastic seal 704 through the extrusion ring 703 when the tilting rod 702 rotates. The second diversion component 8 also includes a pressure rod 804, which is installed on the top of the second diversion platform 801. The pressure rod 804 can pass through the bottom of the second diversion platform 801 and squeeze the tilting rod 702.

[0039] One end of the tilting rod 702 is hinged to the first diversion platform 701, and the end close to the hinge is in contact with the extrusion ring 703, so that a lever structure can be formed by the tilting rod 702. When the pressure rod 804 moves upward, the end of the tilting rod 702 away from the extrusion ring 703 is squeezed, and the elastic seal 704 can be pressed downward with less effort. The movement of the elastic seal 704 can be achieved only by buoyancy, and the isolation of the ethyl acetate and water layers can be achieved by the downward movement of the elastic seal 704.

[0040] like Figure 4 and Figure 5 As shown, the bottom of the first diverter platform 701 is also provided with a groove matched with the third guide groove on the top of the second diverter platform 801.

[0041] The groove set at the bottom of the first diversion platform 701 and the third guide groove on the top of the second diversion platform 801 can contact each other after the water and ethyl acetate are completely separated, and are in pressure contact under the action of buoyancy. In this way, the contact between the ethyl acetate and water will be reduced after the separation, thereby improving the separation effect.

[0042] like Figure 2 As shown, the specific gravity of the first diverter 701 is less than water and greater than ethyl acetate, and the specific gravity of the second diverter 801 is less than water and greater than the mixture of ethyl acetate and water.

[0043] The specific gravity of the first diverter 701 and the second diverter 801 are both smaller than that of water, so they both float on top of the water. However, the first diverter 701 is located below the ethyl acetate and above the mixed liquid, while the second diverter 801 is located below the mixed liquid. In this way, the first diverter 701 and the second diverter 801 are distributed up and down to wrap the mixed liquid, and form pressure contact after the mixed liquid is layered.

[0044] It is worth noting that the material discharged into the static tank 1 through the feed pipe 2 is first in a mixed liquid state, and then part of the ethyl acetate and water are separated, at this time forming three regions, upper, middle and lower, from top to bottom, respectively: ethyl acetate, a mixed liquid of ethyl acetate and water, and water.

[0045] like Figure 2 and Figure 6 As shown, the movable component 9 includes a second telescopic rod 901 and a second connecting block 902. The second telescopic rod 901 is fixedly connected to the second diverter platform 801 through the second connecting block 902. The bottom of the second telescopic rod 901 is fixedly connected to the bottom of the inner cavity of the static tank 1. A gap is set between the second telescopic rod 901 and the second diverter platform 801.

[0046] The second telescopic rod 901 can not only position the second diverter platform 801 so that the pressure rod 804 can smoothly align with the tilting rod 702 when the first diverter platform 701 and the second diverter platform 801 approach each other, but also achieve the function of drainage. Through the cooperation of the second telescopic rod 901 and the first telescopic rod 6, the first diverter platform 701 and the second diverter platform 801 can be freely floated by buoyancy. Under the action of buoyancy, the first diverter platform 701 and the second diverter platform 801 are located at the layering point of ethyl acetate and water.

[0047] The working principle and use process of the present invention:

[0048] The mixed liquid of ethyl acetate and water enters the static tank 1 through the feed pipe 2, and falls on the top of the steady flow platform 501, slows down and falls through the first guide groove on the top of the steady flow platform 501, and reaches the top of the first diverter 701 through the drainage of the first telescopic rod 6. The second guide groove on the top of the first diverter 701 also slows down the mixed liquid, and makes the mixed liquid fall on the second diverter 801 through the limit rod 803. After the third guide groove on the second diverter 801 slows down again, it is drained to the bottom of the inner cavity of the static tank 1 through the second telescopic rod 901. When the amount of the mixed liquid increases, since the specific gravity of the first diverter 701 and the second diverter 801 is larger than that of the mixed liquid, the first diverter 701 floats upward, and the second diverter 801 falls downward, and a relative balance is formed;

[0049] As the mixed liquid gradually separates into layers, three regions are formed inside the static tank 1 from top to bottom, which are ethyl acetate, mixed liquid and water. At this time, the mixed liquid is in the region between the first diverter 701 and the second diverter 801. As the mixed liquid is further separated, the first diverter 701 and the second diverter 801 gradually contact each other and are in pressure contact under the action of buoyancy. The pressure rod 804 also gradually enters the first diverter 701 and squeezes the lifting rod 702, so that the lifting rod 702 squeezes the squeezing ring 703 to drive the elastic sealing member 704 to move downward. The elastic sealing member 704 moves downward to separate the ethyl acetate and water.

[0050] At this time, the ethyl acetate and water are completely separated. The ethyl acetate located at the top after separation is first extracted through the first discharge port 3, and the water located at the bottom is discharged through the second discharge port 4 after the extraction is completed.

[0051] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-purity purification device for ethyl acetate, comprising a stationary tank (1), wherein the surface of the stationary tank (1) is also provided with a feed pipe (2), a first discharge port (3) and a second discharge port (4), characterized in that: Also includes, A flow stabilizing component (5), the flow stabilizing component (5) being installed on the top of the inner cavity of the static tank (1), the flow stabilizing component (5) comprising a flow stabilizing platform (501), the top of the flow stabilizing platform (501) being provided with a first flow guide groove for stabilizing the flow of a mixture of ethyl acetate and water; A first telescopic rod (6), the first telescopic rod (6) being arranged in an annular manner at the bottom of the flow stabilizing component (5); A first flow diversion component (7), the first flow diversion component (7) being connected to the flow stabilizing component (5) via a first telescopic rod (6), the first flow diversion component (7) comprising a first flow diversion platform (701), a second flow guide groove being arranged on the top of the first flow diversion platform (701); a second flow diverter assembly (8), the second flow diverter assembly (8) being movable below the first flow diverter assembly (7), the second flow diverter assembly (8) comprising a second flow diverter platform (801), a connecting piece (802) and a limiting rod (803), a third flow guide groove being arranged on the top of the second flow diverter platform (801), the limiting rod (803) being fixedly mounted on the top of the second flow diverter platform (801), and the limiting rod (803) being slidably connected to the first flow diverter platform (701) via the connecting piece (802); A movable component (9), the movable component (9) being connected to the bottom of the inner cavity of the static tank (1) and used for supporting the second flow diversion component (8); The first flow diversion component (7) further comprises a tilting rod (702), an extrusion ring (703) and an elastic sealing member (704); the tilting rod (702) is rotatably connected to the inside of the first flow diversion platform (701); the elastic sealing member (704) is sleeved on the outside of the first flow diversion platform (701); the extrusion ring (703) is arranged on the top of the elastic sealing member (704); and when the tilting rod (702) rotates, the elastic sealing member (704) can be pressed down through the extrusion ring (703); The second flow diversion assembly (8) further comprises a pressure rod (804), wherein the pressure rod (804) is mounted on the top of the second flow diversion platform (801), and the pressure rod (804) is capable of passing through the bottom of the second flow diversion platform (801) and squeezing the tilting rod (702).

2. The high-purity purification equipment for ethyl acetate according to claim 1, characterized in that: The flow stabilizing assembly (5) further comprises a flow limiting baffle (502) and a first connecting block (503); the flow limiting baffle (502) is mounted on the outer edge of the flow stabilizing platform (501) and the flow limiting baffle (502) is fixedly connected to the inner cavity of the static tank (1); and the first connecting block (503) is fixedly connected to the flow limiting baffle (502).

3. The high-purity purification equipment for ethyl acetate according to claim 2, characterized in that: The first telescopic rod (6) passes through the flow stabilizing platform (501) and is fixedly connected to the first connecting block (503); a gap is provided between the flow stabilizing platform (501) and the first telescopic rod (6).

4. The high-purity purification equipment for ethyl acetate according to claim 1, characterized in that: The bottom of the first flow diversion platform (701) is also provided with a groove adapted to the third flow guide groove at the top of the second flow diversion platform (801).

5. The high-purity purification equipment for ethyl acetate according to claim 1, characterized in that: The specific gravity of the first flow divider (701) is less than that of water and greater than that of ethyl acetate, and the specific gravity of the second flow divider (801) is less than that of water and greater than that of a mixture of ethyl acetate and water.

6. The high-purity purification equipment for ethyl acetate according to claim 1, characterized in that: The movable component (9) comprises a second telescopic rod (901) and a second connecting block (902); the second telescopic rod (901) is fixedly connected to the second diverter table (801) via the second connecting block (902); and the bottom of the second telescopic rod (901) is fixedly connected to the bottom of the inner cavity of the stationary tank (1).

7. The high-purity purification equipment for ethyl acetate according to claim 6, characterized in that: A gap is provided between the second telescopic rod (901) and the second diverter platform (801).

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