Esterification tower for acetic ester and tower tray structure of esterification tower

Abstract

The utility model provides an acetic ester esterification tower and a tower tray structure thereof, the tower tray structure comprises a plurality of tower trays which are arranged in the acetic ester esterification tower at intervals, and each tower tray is provided with a plurality of trapezoidal guide float valves; the plurality of liquid receiving trays are respectively arranged on the plurality of tower trays, and the liquid receiving trays on the adjacent tower trays are arranged along opposite directions; each liquid falling plate is provided with a liquid inlet end and a liquid outlet end, the liquid inlet ends are positioned above the liquid outlet ends, the liquid inlet ends of the liquid falling plates are arranged at one end, far away from the liquid receiving tray, of the tower tray, and the liquid outlet ends of the liquid falling plates are arranged on the liquid receiving tray; through the arrangement of the plurality of layers of tower trays and the floating valves, the tower trays can be arranged at different positions and in different directions as required; the leakage-proof float valve has the advantages that the flow rate under normal load is increased, the operation flexibility is also improved, especially under the working conditions of low load and low liquid quantity, the leakage-proof float valve can effectively reduce the liquid leakage rate of the tray, and the efficiency is improved compared with that of other common float valve trays under the same working conditions.

Description

Technical Field

[0001] This utility model relates to the field of esterification tower filtration technology, and in particular to an esterification tower for acetate and its tray structure. Background Technology

[0002] The esterification tower is a key piece of equipment in the esterification reaction system. It is mainly used to separate the products (such as esters) and by-products (such as water and alcohols) generated by the reaction, and at the same time improve the overall conversion rate by optimizing the reaction conditions.

[0003] Esterification tower trays are usually equipped with guide float valves. Existing guide float valves are prone to foam entrainment during use, which reduces the gas-liquid contact space and reduces efficiency. Utility Model Content

[0004] This utility model application provides an esterification tower for acetate and its tray structure to solve the problems existing in related technologies. The technical solution is as follows:

[0005] In a first aspect, embodiments of this application provide a tray structure suitable for esterification towers of acetate, comprising:

[0006] A plurality of trays are spaced apart in an esterification tower for acetate, and each of the trays has a plurality of trapezoidal guide float valves.

[0007] A plurality of liquid receiving trays are respectively disposed on a plurality of tower trays, and the liquid receiving trays on adjacent tower trays are disposed in opposite directions;

[0008] A plurality of downcomer plates, each having an inlet end and an outlet end, wherein the inlet end is located above the outlet end, the inlet end of each downcomer plate is located on the end of the tray away from the receiving tray, and the outlet end of each downcomer plate is located on the receiving tray.

[0009] When the esterification tower of acetate is fed, the liquid enters through the receiving pan on the initial tray, flows along the initial tray to the end away from the receiving pan, and is delivered to the end of the adjacent tray with the receiving pan through the downcomer. The trapezoidal guide float valve is set along the direction of water flow.

[0010] In one implementation, it further includes:

[0011] A plurality of guide float valves are disposed on the tray, and the plurality of guide float valves are spaced apart from the plurality of trapezoidal guide float valves.

[0012] In one implementation,

[0013] The tray has tray openings corresponding to the guide float valve and the trapezoidal guide float valve.

[0014] In one implementation,

[0015] Both the guide float valve and the trapezoidal guide float valve include:

[0016] A cover, wherein the cover is movably disposed within the opening of the tower plate, and the cover has a circular hole;

[0017] A valve plate is disposed on the cover and has a lateral opening.

[0018] In one implementation, it further includes:

[0019] A plurality of fixing plates are provided on the liquid outlet end of the corresponding liquid descending plate, and the liquid outlet end of the liquid descending plate is provided on the liquid receiving plate through the fixing plates.

[0020] In one implementation, it further includes:

[0021] An overflow weir is provided between the liquid inlet end of the downcomer and the tray.

[0022] In one implementation, it further includes:

[0023] An inlet weir, the inlet edge being positioned on the initial receiving plate.

[0024] In one implementation, it further includes:

[0025] A clip is disposed between the receiving plate and the descending plate.

[0026] In one implementation, it further includes:

[0027] A handle is provided on the tray, and the number of handles corresponds to the number of trays;

[0028] Channel, which is provided on the tray.

[0029] Secondly, embodiments of this application provide an esterification tower for acetate, comprising:

[0030] A tray structure as described in any of the above embodiments; and

[0031] A liquid inlet assembly, which corresponds to the tray in the initial direction.

[0032] The advantages or beneficial effects of the above technical solutions include at least the following:

[0033] By using multi-layer trays and floating valves, the trays can be arranged in different positions and directions as needed. The trapezoidal guide floating valves have a guiding function, eliminating liquid-carrying zones on the trays, reducing the liquid gradient, and improving the liquid phase distribution on the trays. This increases throughput under normal load and improves operational flexibility. Especially under low load and low liquid volume conditions, using leak-proof floating valves can effectively reduce tray leakage rate, resulting in higher efficiency compared to other ordinary floating valve trays under the same operating conditions. Attached Figure Description

[0034] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0035] Figure 1 This is a schematic diagram of the structure of an esterification tower for acetate.

[0036] Figure 2 This is a schematic diagram of the tray arrangement.

[0037] Figure 3 This is a top view of the tower's structure.

[0038] Figure 4 A schematic diagram of the structure and gas phase flow direction of the guide float valve;

[0039] Figure 5 A top view of the structure of the guide float valve and a schematic diagram of the liquid flow direction;

[0040] In the picture:

[0041] 100. Tray; 101. Tray opening; 110. Trapezoidal guide valve; 120. Guide valve; 121. Cover; 122. Valve plate; 123. Round hole; 124. Lateral opening;

[0042] 200. Receiving tray; 210. Fixing plate; 220. Overflow weir; 230. Inlet weir; 240. Clamp; 250. Handle; 260. Channel;

[0043] 300. Downcomer plate; 301. Inlet end; 302. Outlet end;

[0044] 400. Esterification tower for acetate; 410. Inlet assembly. Detailed Implementation

[0045] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this application. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0046] Figures 1-5 A structural diagram of a tray 100 structure according to an embodiment of this application is shown. Figures 1-5 As shown, the structure of the tray 100 may include:

[0047] A plurality of trays 100 are spaced apart within an esterification tower 400 for acetate, and each of the trays 100 has a plurality of trapezoidal guide float valves 110.

[0048] A plurality of liquid receiving trays 200 are respectively disposed on a plurality of trays 100, and the liquid receiving trays 200 on adjacent trays 100 are disposed in opposite directions;

[0049] A plurality of downcomer plates 300 are provided, each having an inlet end 301 and an outlet end 302. The inlet end 301 is located above the outlet end 302. The inlet ends 301 of the plurality of downcomer plates 300 are all located on the end of the tray 100 away from the receiving tray 200, and the outlet ends 302 of the downcomer plates 300 are all located on the receiving tray 200.

[0050] When the esterification tower 400 of acetate is fed with liquid, the liquid enters through the liquid receiving tray 200 on the initial tray 100, flows along the initial tray 100 to the end away from the liquid receiving tray 200, and is transported through the downcomer 300 to the end of the adjacent tray 100 with the liquid receiving tray 200. The trapezoidal guide float valve 110 is arranged along the water flow direction.

[0051] In this embodiment, the liquid enters through the initial receiving tray 200, moves from the initial tray 100 to the initial downcomer 300, and is then transported by the downcomer 300 to the second receiving tray 200. The above process is repeated until the liquid is discharged from the esterification tower 400 of acetate. During this process, by setting several trapezoidal guide float valves 110 on the tray 100, the gas phase distribution is made more uniform, the gas-liquid contact space is increased, and liquid entrainment is reduced, thereby further improving the gas-liquid two-phase mass transfer efficiency.

[0052] The trapezoidal guide float valve 110 can be designed and arranged in different positions and directions as needed. It has a guiding function, which can eliminate the liquid carrying area on the tray 100, reduce the liquid gradient, and improve the liquid phase fluid distribution on the tray 100.

[0053] Compared with existing ordinary floating valves, the combined floating valve tray 100 has increased throughput under normal load and improved operational flexibility.

[0054] Especially under low load and low liquid volume conditions, the use of leak-proof floating valves can effectively reduce the leakage rate of tray 100 and improve the efficiency of tray 100 under the same conditions compared with other ordinary floating valve trays.

[0055] Specifically, several trays 100 and several downcomers 300 are arranged in several connected "S" shapes;

[0056] By using multi-layer trays 100 and floating valves, the trays can be arranged in different positions and directions as needed. The trapezoidal guide floating valves 110 have a guiding function, which can eliminate liquid carrying areas on the trays 100, reduce the liquid gradient, and improve the liquid phase fluid distribution on the trays 100. This increases the throughput under normal load and improves operational flexibility. Especially under low load and low liquid volume conditions, the use of leak-proof floating valves can effectively reduce the leakage rate of the trays 100, and improve the efficiency of trays 100 with ordinary floating valves under the same operating conditions.

[0057] like Figures 2-3 As shown, in one embodiment, it further includes:

[0058] A plurality of guide float valves 120 are disposed on the tray 100, and the plurality of guide float valves 120 are spaced apart from the plurality of trapezoidal guide float valves 110.

[0059] Specifically, a trapezoidal guide valve 110 is installed after every three guide valves 120. The valves can be arranged in different positions and directions as needed. By setting the guide valves 120 and trapezoidal guide valves 110, the liquid carrying area on the tray 100 can be eliminated, the liquid gradient can be reduced, and the liquid phase fluid distribution on the tray 100 can be improved.

[0060] like Figures 2-5 As shown, in one embodiment,

[0061] The tray 100 has tray openings 101 corresponding to the guide float valve 120 and the trapezoidal guide float valve 110.

[0062] A cover 121 is movably disposed within the opening 101 of the tower plate, and the cover 121 has a circular hole 123.

[0063] A valve plate 122 is disposed on the cover 121, and the valve plate 122 has a lateral opening 124.

[0064] In this embodiment, the cover 121 can effectively fix the float valve, and the valve plate 122 can float freely up and down along the cover 121 without getting stuck. It can effectively seal the liquid phase when the liquid volume is low, and reduce the leakage compared to other float valves.

[0065] The size and number of tray openings 101 on tray 100 can be adjusted according to the working conditions and the needs of the designers, effectively reducing design constraints.

[0066] The new trapezoidal guided float valve 110 has guide holes for horizontal spraying on the side and top of the valve, which makes the gas phase distribution more uniform and can make full use of the mass transfer space at the top of the float valve, increasing the gas-liquid contact space and reducing liquid entrainment, thereby further improving the gas-liquid two-phase mass transfer efficiency.

[0067] The guide valve 120 can be designed to be arranged in different positions and directions as needed. The guide valve 120 has a guiding function, which can eliminate the liquid carrying area on the tray 100, reduce the liquid gradient, and improve the liquid phase fluid distribution on the tray 100.

[0068] The new embedded tray 100 connection method allows float valves to be placed in the segmented connection areas of the tray 100, increasing the open area ratio of the tray 100 and the uniformity of the float valve arrangement.

[0069] Specifically, the valve plate 122 is arranged in an arc shape. When gas enters through the opening 101 of the tower plate, the gas pushes the valve plate 122 up.

[0070] like Figures 2-3 As shown, in one embodiment, it further includes:

[0071] A plurality of fixing plates 210 are disposed on the liquid outlet end 302 of the corresponding liquid discharge plate 300, and the liquid outlet end 302 of the liquid discharge plate 300 is disposed on the liquid receiving plate 200 through the fixing plates 210.

[0072] In this embodiment, the liquid downcomer 300 is installed by the fixing plate 210 to ensure the stability of the liquid downcomer 300 installation and to prevent the liquid flow direction from deviating when the liquid downcomer 300 delivers the liquid to the receiving plate 200.

[0073] like Figures 2-3 As shown, in one embodiment, it further includes:

[0074] An overflow weir 220 is disposed between the liquid inlet end 301 of the downcomer 300 and the tray 100.

[0075] In this embodiment, the overflow weir 220 can effectively control the liquid level in the esterification tower 400 of acetate. When the liquid level is too high, the excess liquid flows out through the overflow weir 220 to prevent the liquid level from affecting the operation; when the liquid level is too low, external liquid can be replenished through the overflow weir 220 to maintain the liquid level balance.

[0076] like Figures 2-3 As shown, in one embodiment, it further includes:

[0077] An inlet weir 230 is provided on the initial liquid receiving plate 200.

[0078] In this embodiment, the design of the inlet weir 230 can effectively reduce the impact of liquid at the inlet and prevent liquid from rushing out of the tray 100.

[0079] like Figures 2-3 As shown, in one embodiment, it further includes:

[0080] A clip 240 is disposed between the liquid receiving plate 200 and the liquid descending plate 300.

[0081] In this embodiment, the clip 240 facilitates the fixing between the tray 100 and the downcomer 300.

[0082] like Figures 2-3 As shown, in one embodiment, it further includes:

[0083] A handle 250 is provided on the tray 100, and the number of handles 250 corresponds to the number of trays 100.

[0084] Channel 260 is disposed on the tray 100.

[0085] In this embodiment, the handle 250 facilitates the removal of the tray 100, and the channel 260 facilitates the guidance of the liquid.

[0086] Figure 1 A structural diagram of an esterification tower 400 for an acetate ester according to an embodiment of this application is shown. Figure 1 As shown, the esterification tower 400 of the acetate may include:

[0087] A tray 100 structure as described in any of the above embodiments; and

[0088] Liquid inlet assembly 410, which corresponds to the tray 100 in the initial direction.

[0089] In this embodiment, the liquid inlet assembly 410 corresponds to the position of the inlet weir 230 of the initial receiving tray 200. The liquid inlet assembly 410 transports the external liquid into the esterification tower 400 of acetate, and finally outputs it after being processed by the tower tray 100 structure.

[0090] The functions of each module in each device of this utility model embodiment can be found in the corresponding description in the above method, and will not be repeated here.

[0091] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0092] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0093] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A tray structure suitable for esterification towers of acetate, characterized in that, include: A plurality of trays are spaced apart in an esterification tower for acetate, and each of the trays has a plurality of trapezoidal guide float valves. A plurality of liquid receiving trays are respectively disposed on a plurality of tower trays, and the liquid receiving trays on adjacent tower trays are disposed in opposite directions; A plurality of downcomer plates, each having an inlet end and an outlet end, wherein the inlet end is located above the outlet end, the inlet end of each downcomer plate is located on the end of the tray away from the receiving tray, and the outlet end of each downcomer plate is located on the receiving tray. When the esterification tower of acetate is fed, the liquid enters through the receiving pan on the initial tray, flows along the initial tray to the end away from the receiving pan, and is delivered to the end of the adjacent tray with the receiving pan through the downcomer. The trapezoidal guide float valve is set along the direction of water flow.

2. The tray structure according to claim 1, characterized in that, Also includes: A plurality of guide float valves are disposed on the tray, and the plurality of guide float valves are spaced apart from the plurality of trapezoidal guide float valves.

3. A tray structure according to claim 2, characterized in that, The tray has tray openings corresponding to the guide float valve and the trapezoidal guide float valve.

4. A tray structure according to claim 3, characterized in that, Both the guide float valve and the trapezoidal guide float valve include: A cover, wherein the cover is movably disposed within the opening of the tower plate, and the cover has a circular hole; A valve plate is disposed on the cover and has a lateral opening.

5. A tray structure according to claim 1, characterized in that, Also includes: A plurality of fixing plates are provided on the liquid outlet end of the corresponding liquid descending plate, and the liquid outlet end of the liquid descending plate is provided on the liquid receiving plate through the fixing plates.

6. A tray structure according to claim 1, characterized in that, Also includes: An overflow weir is provided between the liquid inlet end of the downcomer and the tray.

7. A tray structure according to claim 1, characterized in that, Also includes: An inlet weir, the inlet edge being positioned on the initial receiving plate.

8. A tray structure according to claim 1, characterized in that, Also includes: A clip is disposed between the receiving plate and the descending plate.

9. A tray structure according to claim 1, characterized in that, Also includes: A handle is provided on the tray, and the number of handles corresponds to the number of trays; Channel, which is provided on the tray.

10. An esterification tower for acetate, characterized in that, include: A tray structure as described in any one of claims 1-9; as well as A liquid inlet assembly, which corresponds to the tray in the initial direction.

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