Bubble cap, tray and plate tower

Abstract

The utility model discloses a bubble cap, a tray and a plate tower. The bubble cap comprises a bubble cap and a riser arranged in the bubble cap, wherein the bubble cap and the riser are coaxially arranged; the bubble cap comprises a hollow cavity formed in the bottom and an air blocking cap coaxially arranged above the hollow cavity, and an opening of the air blocking cap faces downwards. The diameter of the hollow cavity is larger than that of the gas blocking cap so as to form an external boss, and the upper surface, covered by the gas blocking cap, of the hollow cavity is provided with an opening, so that the internal space of the hollow cavity is communicated with the gas blocking cap; annular space flow channels are formed between the gas rising pipe and the gas blocking cap and between the gas rising pipe and the hollow cavity and used for gas circulation; a hole channel is vertically formed in the upper surface of the boss and used for gas circulation. The plate type tower adopting the bubble cap has the advantages in the aspects of improving the production capacity, expanding the operation flexibility, improving the gas phase distribution and the like.

Description

Technical Field

[0001] The utility model relates to a bubble cap, a tower tray and a plate tower. Background Art

[0002] Bubble cap trays are widely used in gas-liquid two-phase reaction / mass transfer operations such as reaction, distillation, and absorption in production.

[0003] A bubble tower is a plate tower with bubbles as gas-liquid contact elements on the tower plate. It is usually used to bring steam (or gas) into close contact with liquid to promote their mutual reaction / mass transfer, so as to achieve the purpose of reaction and separation of liquid mixture or gas mixture components.

[0004] The existing bubble cap tray has a thick liquid layer and uneven gas distribution, which leads to a large pressure drop, limited gas velocity, low production capacity, and insufficient gas-liquid contact and reaction. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a bubble cap, a tower tray and a plate tower. The plate tower containing the bubble cap and the tower tray has advantages in improving production capacity, expanding operation flexibility and improving gas phase distribution.

[0006] The utility model solves the above technical problems through the following technical solutions.

[0007] The utility model provides a bubble cap, which comprises a bubble cap arranged coaxially and an air riser arranged inside the bubble cap;

[0008] The bubble cap comprises a hollow cavity arranged at the bottom and an air blocking cap coaxially arranged above the hollow cavity, and the opening of the air blocking cap faces downward;

[0009] The diameter of the hollow cavity is larger than the diameter of the air stop cap to form an external boss, and an opening is provided on the upper surface of the hollow cavity covered by the air stop cap, so that the internal space of the hollow cavity is connected to the air stop cap;

[0010] An annular gap flow channel is formed between the air riser and the air baffle cap, and between the air riser and the hollow cavity for gas circulation;

[0011] A hole is vertically opened on the upper surface of the boss, and the hole is used for gas circulation.

[0012] In the present invention, preferably, the height-to-diameter ratio of the riser is ≥1:2, for example, 6.5:1.

[0013] In the present invention, preferably, the ratio of the area of ​​the annular gap flow channel formed between the riser and the air baffle cap is ≥1:1, for example, 1:1.

[0014] In the present invention, preferably, the distance between the top of the riser and the top of the air baffle cap accounts for 6%-7% of the height of the riser, for example, 6.5%.

[0015] In the present invention, preferably, the distance between the top of the riser pipe and the top of the air baffle cap is equal to the height of the hollow cavity.

[0016] In the present invention, preferably, the ratio of the height of the riser to the height of the hollow cavity is greater than 2:1, for example, 260:17.

[0017] In the utility model, the gas backflow can be effectively prevented by controlling the ratio of the height of the air riser to the height of the chassis.

[0018] In the present invention, preferably, the distance between the axes of each two adjacent holes is ≥ the diameter of the hole + 3 mm.

[0019] In the present invention, preferably, the ratio of the distance between the axes of each two adjacent channels to the width of the upper surface is 1:4.

[0020] In the present invention, preferably, along the radial direction of the upper surface, the distance between the channel close to the edge of the upper surface and the edge of the upper surface is ≥3 mm.

[0021] In the present invention, preferably, the holes are arranged along a ring equidistant from the center of the upper surface of the boss, and the number of the rings is 2.

[0022] In the present invention, preferably, the bottom of the hollow cavity is provided with an opening for clamping the riser.

[0023] In some specific embodiments, the boss further includes a side wall perpendicular to the upper surface.

[0024] In the present invention, preferably, the holes are evenly distributed on the upper surface, and the even meaning is that the distance between the axes of every two adjacent holes is equal.

[0025] In the present invention, the number of holes opened on the upper surface is generally based on the number required by process hydraulics, for example, 60 holes.

[0026] In the present invention, the diameter of the hole is generally based on the quantity required to meet the process hydraulics, for example, 4 mm.

[0027] The utility model also provides a tower plate, which comprises a tower plate and the bubble cap arranged on the tower plate.

[0028] In the present invention, the number of the blisters is generally based on the number required by process hydraulics, for example, 74.

[0029] In the utility model, preferably, an outlet weir is provided on the tower plate.

[0030] Preferably, the ratio of the height of the riser to the height of the outlet weir is ≥1:1, for example, 1.6:1.

[0031] In the present invention, preferably, the bubbles are evenly distributed on the tower plate.

[0032] The utility model also provides a plate-type tower, which comprises the tower plate.

[0033] In the present invention, preferably, the distance between every two adjacent trays is ≤350 mm. Compared with the conventional tray spacing greater than 350 mm in the prior art, the plate tower of the present invention is convenient for disassembly and assembly, and there is no need to consider the activity space for people installed in the tower.

[0034] In the utility model, preferably, each of the tower plates is provided with a cylinder section, and the cylinder sections between every two adjacent tower plates are connected by flanges. This connection method is used to consider the installation space, facilitate the increase or decrease of the number of tower plates, and make it more convenient to increase or decrease the production capacity.

[0035] In the present invention, preferably, the plate tower is, for example, a distillation tower, a reaction tower or an absorption tower.

[0036] The positive and progressive effects of the utility model are:

[0037] The bubble cap of the utility model can separate the gas phase from the liquid phase, and by changing the gas flow direction, the gas flows along the S-shaped flow channel and finally overflows from the hole on the upper surface of the bottom plate. The bubble cap of the utility model can make the gas and liquid have a longer time of close and uniform contact when the tower plate has a high liquid holding capacity (for example, the height of the liquid holding capacity is higher than the height of the bubble cap boss), thereby improving the mass transfer efficiency of the tower plate and avoiding liquid short circuit.

[0038] The plate tower using the bubble cap of the utility model has advantages in improving production capacity, expanding operation flexibility and improving gas phase distribution. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a schematic diagram of the structure of the tower plate of Example 1.

[0040] Figure 2 for Figure 1 Top view of the .

[0041] Figure 3 This is a schematic diagram of the structure of the riser of Example 1.

[0042] Figure 4 for Figure 3 Top view of the .

[0043] Figure 5 Schematic diagram of the structure of the bubble cap of Example 1.

[0044] Figure 6 for Figure 5 Top view of the .

[0045] The reference numerals are as follows:

[0046] 1- bubble cap; 2- riser pipe; 3- tray; 4- outlet weir; 5- bubble cap;

[0047] 101-hollow cavity; 102-air baffle cap; 103-channel. DETAILED DESCRIPTION

[0048] A preferred embodiment is given below, and the present invention is described more clearly and completely in conjunction with the accompanying drawings.

[0049] Example 1

[0050] The bubble cap 5 of Example 1 comprises a bubble cap 1 and an air riser 2 arranged inside the bubble cap 1, and the structure of the air riser 2 is shown in FIG. Figure 3 As shown, the top view of the riser 2 is as shown in Figure 4 As shown;

[0051] The structural schematic diagram of the bubble cap 1 is as follows Figure 5 As shown, the top view of the bubble cap 1 is as shown Figure 6 As shown, the bubble cap 1 comprises a hollow cavity 101 arranged at the bottom and an air blocking cap 102 coaxially arranged above the hollow cavity 101, and the opening of the air blocking cap 102 is downward;

[0052] The diameter of the hollow cavity 101 is larger than the diameter of the air blocking cap 102 to form an external boss. The upper surface of the hollow cavity 101 covered by the air blocking cap 102 is provided with an opening, so that the internal space of the hollow cavity 101 is connected to the air blocking cap 102.

[0053] An annular gap flow channel is formed between the riser 2 and the air blocking cap 102, and between the riser 2 and the hollow cavity 101 for gas circulation;

[0054] A hole 103 is vertically opened on the upper surface of the boss, and the hole 103 is used for gas circulation.

[0055] The height-to-diameter ratio of the riser 2 is 6.5:1; the ratio of the area of ​​the annular gap flow channel formed between the riser 2 and the air stop cap 102 to the cross-sectional area of ​​the riser 2 is 1:1; in other specific embodiments, the distance between the top of the riser 2 and the top of the air stop cap 102 ensures that its flow area is ≥ 1 times the flow area of ​​the riser, for example, the distance between the top of the riser 2 and the top of the air stop cap 102 can ensure that its flow area is 1.5 times the flow area of ​​the riser. The distance between the top of the riser 2 and the top of the air stop cap 102 is equal to the height of the chassis; the ratio of the height of the riser 2 to the height of the hollow cavity 101 is 260:17.

[0056] Among them, the distance between the axes of each two adjacent channels is the diameter of the channel + 3mm; along the radial direction of the upper surface, the distance between the channel close to the edge of the upper surface and the edge of the upper surface is 3mm; the channels are arranged in a ring with an equal distance from the center of the upper surface of the boss, and the number of rings is 2; the number of channels opened on the upper surface is 60, and the diameter of the channel 103 is 4mm; the ratio of the distance between the axes of each two adjacent channels to the width of the upper surface is 1:4.

[0057] The tray of Example 1 comprises a tray 3 and a bubble cap 5 disposed on the tray 3. The structural schematic diagram of the tray is shown in FIG. Figure 1 , Figure 2 A top view of the tower plate.

[0058] Among them, the number of blisters 5 is 74.

[0059] The diameter of the tray 3 is 1800 mm, the lateral distance between the axes of each two adjacent bubbles 5 is 260 mm, and the longitudinal distance between the axes of each two adjacent bubbles 5 is 150 mm. The bubbles 5 are evenly distributed on the tray 3.

[0060] Among them, an outlet weir 4 is provided on the tower plate 3, the height of the outlet weir 4 is 160 mm, and the height of the riser 2 is 260 mm;

[0061] The plate tower of Example 1 comprises tower trays.

[0062] Among them, the number of tower plates is 10.

[0063] The distance between every two adjacent tower plates is 355 mm.

[0064] Each tray is provided with a cylinder section, and the cylinder sections between every two adjacent trays are connected by flanges. This connection method can make it easier to increase or decrease production capacity.

[0065] Among them, the plate tower is an example of a distillation tower.

[0066] From the perspective of the liquid holding layer height on the tower plate, the gas-liquid exchange efficiency of Example 1 is higher than the bubble efficiency in the prior art, which is twice or even several times higher.

Claims

1. A blister, characterized in that: It includes a coaxially arranged bubble cap and an air riser arranged inside the bubble cap; The bubble cap comprises a hollow cavity arranged at the bottom and an air blocking cap coaxially arranged above the hollow cavity, and the opening of the air blocking cap faces downward; The diameter of the hollow cavity is larger than the diameter of the air stop cap to form an external boss, and an opening is provided on the upper surface of the hollow cavity covered by the air stop cap, so that the internal space of the hollow cavity is connected to the air stop cap; An annular gap flow channel is formed between the air riser and the air baffle cap, and between the air riser and the hollow cavity for gas circulation; A hole is vertically opened on the upper surface of the boss, and the hole is used for gas circulation.

2. The blister according to claim 1, wherein It meets one or more of the following conditions: ① The height-to-diameter ratio of the riser is ≥1:2; ② The ratio of the area of ​​the annular gap flow channel formed between the riser and the air baffle cap to the cross-sectional area of ​​the riser is ≥1:1; ③ The ratio of the height of the riser to the height of the hollow cavity is greater than 2:

1.

3. The blister according to claim 2, wherein: It meets one or more of the following conditions: ① The height-to-diameter ratio of the riser is 6.5:1; ② The ratio of the area of ​​the annular gap flow channel formed between the riser and the air baffle cap to the cross-sectional area of ​​the riser is 1:1; ③ The ratio of the height of the riser to the height of the hollow cavity is 260:

17.

4. The blister according to claim 1, wherein: It meets one or more of the following conditions: ① The distance between the axes of each two adjacent holes is ≥ the diameter of the hole + 3mm; ② The ratio of the distance between the axes of each two adjacent channels to the width of the upper surface is 1:4; ③ Along the radial direction of the upper surface, the distance between the hole close to the edge of the upper surface and the edge of the upper surface is ≥3mm; ④ The holes are arranged in a ring equidistant from the center of the upper surface of the boss, and the number of the rings is 2.

5. The blister according to claim 1, wherein: It meets at least one of the following conditions: ① The distance between the top of the riser and the top of the air baffle cap is equal to the height of the hollow cavity; ② The holes are evenly distributed on the upper surface, and the even meaning is that the distance between the axes of every two adjacent holes is equal; ③ The bottom of the hollow cavity is provided with an opening for clamping the riser pipe; ④ The boss also includes a side wall perpendicular to the upper surface.

6. A tower tray, characterized in that: The method comprises a column plate and the bubble cap according to any one of claims 1 to 5 arranged on the column plate.

7. The tray according to claim 6, characterized in that It meets at least one of the following conditions: ① An outlet weir is provided on the tower plate; ② The bubbles are evenly distributed on the tower plate.

8. The tray according to claim 7, characterized in that The ratio of the height of the riser to the height of the outlet weir is ≥1:

1.

9. A plate tower, characterized in that: It comprises the column tray as claimed in any one of claims 6 to 8.

10. The plate tower according to claim 9, characterized in that It meets at least one of the following conditions: ①The distance between every two adjacent trays is ≤350mm; ② Each of the tower plates is provided with a cylinder segment, and the cylinder segments between every two adjacent tower plates are connected by flanges.

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