Novel gas injection tower plate with open type flow baffles

Abstract

The utility model discloses a novel gas injection tower plate with an open type flow baffle. The novel gas injection tower plate mainly comprises the flow baffle, a gas injection plate and gas rising holes, in order to improve the mass transfer efficiency and control the gas trend, a gas guide flange can be formed on the jet plate. Gas enters from the gas rising holes to drive liquid to rise along the spraying plate to reach the flow baffle, and the liquid is split into a large number of small liquid drops under the crushing action of the flow baffle, so that the gas-liquid contact area is increased, the gas-liquid mass transfer effect is enhanced, and the separation efficiency is improved; meanwhile, the gas phase and the liquid phase are blocked at the flow baffle, the speed is reduced, the liquid phase entrained in the gas phase can be conveniently condensed and fall back, and entrainment is reduced. The treatment capacity of the novel gas injection tower plate with the open type flow baffles can reach 1.5-2.5 times that of a common tower plate, the pressure drop of the tower plate is about 30%-60% that of the common tower plate, the entrainment entrainment rate is about 60%-90% that of a rectangular floating valve, and the novel gas injection tower plate has the advantages of high separation efficiency and wide operation range.

Description

Technical Field

[0001] This utility model relates to a novel gas jet tower plate with an open baffle plate, belonging to the field of gas-liquid mass transfer separation devices in the chemical industry. Background Technology

[0002] Distillation columns are important equipment for mass and heat transfer between gas and liquid phases. They are widely used in industries such as oil refining, chemical industry, environmental protection, and pharmaceuticals, involving unit operations such as distillation, absorption, desorption, and extraction. Plate columns are one type of such column.

[0003] A plate column consists of a cylindrical shell and several horizontally arranged trays at regular intervals along its height. Inside the plate column, liquid flows from the top to the bottom of the column by gravity, forming a flowing liquid layer on each tray. Gas, driven by pressure difference, flows upward from the bottom, passing through the liquid layers on each tray, towards the top. The gas and liquid phases come into contact at each tray, completing mass and heat transfer processes and achieving component separation.

[0004] Trays are the core components of plate columns, determining the overall performance of the distillation column. Since Cellier first proposed the bubble cap column in 1813, various types of trays have been designed. Currently, the most commonly used trays in industry are bubble cap columns, valve tray columns, and sieve tray columns.

[0005] Bubble cap trays were among the earliest types of trays, primarily composed of risers and bubble caps. Gas enters the bubble cap through the riser, passes through the annular cross-section and rotating channel, and then enters the liquid layer via the serrated edges. The gas is dispersed and comes into gas-liquid contact with the liquid layer on the tray, forming bubbling and foam layers, thereby achieving mass and heat transfer. Bubble cap trays are less prone to leakage and clogging, have high separation efficiency, and offer great operational flexibility, making them suitable for handling various materials. However, the complex structure and high cost of this tray, along with its excessive pressure drop, limit its application.

[0006] A valve train is a tray with valve holes to accommodate floating valves. Because the gas flow area of ​​the valve train tray automatically adjusts with changes in gas load, it can maintain stable operation under a wide range of gas loads. Simultaneously, the gas is blown out horizontally over the floating valves, resulting in a long gas-liquid contact time, less mist entrainment, good operational flexibility, and high tray efficiency, leading to its widespread industrial application. Despite these advantages, valve trains are not suitable for systems prone to coking or with high viscosity, and the floating valves are susceptible to detachment.

[0007] Sieve tray towers are a relatively simple type of tower tray. An overflow weir is installed on the tray to maintain a certain liquid layer thickness. The rising gas flow is dispersed into fine bubbles through the sieve openings, which bubble out from the liquid layer on the tray, allowing for close gas-liquid contact and mass transfer. Under normal operating conditions, the velocity of the rising gas flow through the sieve openings should be sufficient to prevent liquid leakage downwards through the sieve openings. Sieve tray towers are simple in structure, easy to manufacture, and inexpensive, costing approximately 60% of bubble cap towers and 80% of valve train towers, while offering higher production capacity. However, sieve tray towers have limited operational flexibility, and the small sieve openings make them prone to clogging.

[0008] In recent years, people have been researching and improving sieve tray towers, resulting in some new types of sieve trays, such as vertical sieve trays (three-dimensional mass transfer trays). Although these new sieve trays have made good improvements in terms of processing capacity and operational flexibility, they still have problems such as excessive mist entrainment and slightly large tray pressure drop, which limits their application. Utility Model Content

[0009] To address the shortcomings of existing trays, especially sieve trays, this invention proposes a novel gas jet tray with an open baffle plate to reduce tray pressure drop and mist entrainment, improve processing capacity, broaden the operating range, and make it more suitable for engineering applications.

[0010] To address the problems of high pressure drop and limited application of existing vertical sieve trays or gas jet trays, this utility model discloses a novel gas jet tray with an open baffle plate, such as... Figure 1 and 2 As shown, the technical solution is as follows:

[0011] A novel gas injection tower plate with an open baffle plate includes a gas riser hole, a gas injection plate, a baffle plate, a gas guide flange, a fastening structure, and riveting holes.

[0012] In the above technical solution, the tower plate has air riser holes, and the long side of the air riser holes has serrated, semi-circular, trapezoidal and other shaped toothed edges.

[0013] Two symmetrical or asymmetrical spray plate mounting slots are stamped on the short side of the gas riser. A gas spray tower plate with an open baffle is installed at each gas riser. The fastening structure between the gas spray tower plate and the spray plate mounting slot is set at different positions on the gas spray tower plate to balance the process requirements and processing difficulty.

[0014] The C-shaped flanged spray plate mounting groove fastening structure cut can reduce inlet resistance and has a spray plate fixing cut; the asymmetrical mounting groove edge can control the gas direction and improve mass transfer efficiency.

[0015] Furthermore, the deflector can be formed by an arc at the end or a zigzag transition at various angles:

[0016] For example, if the baffle is an arc-shaped plate, the curvature is between 10-180°;

[0017] If the baffle is a flat plate, the angle between the flat plate and the gas injection plate is between 10 and 180°.

[0018] Furthermore, the gas injection plate has a two-layer symmetrical structure and is fixed to the aforementioned baffle mounting groove by self-riveting. The gas injection plate has riveting holes, allowing the two gas injection plates to be connected by riveting, which helps maintain the stability of the screen plate.

[0019] Furthermore, in the above technical solution, the gas injection plate of the novel gas injection tower plate with open baffle has a gas guide flange, which is a left-right symmetrical structure. The flange shape can be rectangular, square, circular or other shapes, and the number of openings is 1-10.

[0020] This novel gas jet tray with an open baffle plate can achieve a processing capacity 1.5-2.5 times that of ordinary trays, with a tray pressure drop of approximately 30%-60% and a mist entrainment rate of approximately 60%-90% of that of rectangular float valves. Compared to vertical sieve trays, this tray effectively solves the problems of high pressure drop and limited application, while retaining the low mist entrainment rate and film-pulling mass transfer characteristics. Therefore, it has advantages such as high separation efficiency, good anti-clogging ability, and a wide operating range. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a new type of gas injection tower plate with an open baffle.

[0022] Figure 2 This is a schematic diagram of a new type of gas injection tower plate with an open baffle and a gas guiding flange.

[0023] Figure 3 This is a diagram showing the arrangement of the new type of gas injection tower plates with open baffles inside the tower.

[0024] 1. Baffle plate, 2. Injection plate, 3. Fastening structure, 4. Riveting hole, 5. Gas lifting hole, 6. Tower plate, 7. Gas guide flange, 8. Liquid receiving tray, 9. Overflow weir, 10. Downcomer, 11. Open vertical screen plate. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings.

[0026] Example 1:

[0027] like Figure 1The novel gas injection tower plate with an open baffle plate shown consists of a baffle plate 1, an injection plate 2, a fastening structure 3, riveting holes 4, and gas riser holes 5. The tower plate 6 has gas riser holes 5, and the long side of the gas riser holes 5 has serrations (e.g.,...). Figure 1 As shown in a), semicircle (as shown in a) Figure 1 (as shown in c), trapezoidal and other shaped toothed edges, and air vents 5. After the original material at the spray plate mounting groove is cut, it is punched from the plate surface into a symmetrical C-shaped structure (such as...). Figure 1 (as shown in a, c) or asymmetric structures (such as...) Figure 1 As shown in b), a gas injection plate 2 with an open baffle 1 is installed at each of the 5 gas risers. The fastening structure between the gas injection plate 2 and the injection plate mounting slot can be opened at different positions on the injection tower plate, balancing process requirements and manufacturing difficulty. The C-shaped flanged fastening structure cut of the injection plate mounting slot can reduce inlet resistance and has a fixing slit for the injection plate. The asymmetrical edge of the injection plate mounting slot can control the gas direction and improve mass transfer efficiency. The gas injection plate 2 is a two-layer symmetrical structure, fixed to the aforementioned injection plate mounting slot by self-riveting. The baffle 2 can be an arc-shaped plate or a flat plate. If it is an arc-shaped plate, the curvature is between 10-180°. If it is a flat plate, the angle between the flat plate and the injection plate is between 10-180°.

[0028] Example 2:

[0029] like Figure 2 The novel gas injection tower plate with an open baffle plate shown consists of a baffle plate 1, a gas guide flange 7, a gas injection plate 2, a fastening structure 3, riveting holes 4, and gas riser holes 6. Gas riser holes 5 are provided on the tower plate 6 (e.g., Figure 2 As shown in a), the long side of the air vent 5 can have serrations, semicircles, or trapezoids (such as...). Figure 2 (As shown in b) and other toothed edges of various shapes, after the original material of the riser hole 5 is removed from the spray plate mounting groove, it is stamped from the plate surface into a symmetrical C-shaped structure. Each riser hole corresponds to a gas spray plate 2 with an open baffle. The fastening structure between the gas spray plate 2 and the spray plate mounting groove can be opened at different positions on the spray tower plate, balancing process requirements and processing difficulty. The gas spray plate 2 is a two-layer symmetrical structure, which is fixed to the aforementioned C-shaped structure baffle mounting groove by self-riveting. The baffle can be an arc plate or a flat plate. If it is an arc plate, the arc is between 10-180°. If it is a flat plate, the included angle between the flat plate and the spray plate is between 10-180°. In order to improve mass transfer efficiency and control gas direction, the new gas spray tower plate with an open baffle has a gas guide flange 7 on the spray plate 2. The gas guide flange 7 is a left-right symmetrical structure, and the flange shape can be rectangular, square, circular or other shapes, with 1-10 openings.

[0030] like Figure 3The diagram shows the layout of a novel gas jet tower with open baffles within the tower. It includes an open vertical sieve plate 11, an overflow weir 9, and a downcomer 10. Inside the plate tower, liquid falls from the upper downcomer 10 into the receiving tray 8, forming a liquid layer on the tower plate 6. The liquid flow on the plate 6 is smooth, the liquid surface gradient is reduced, and the required liquid layer height is not high. Gas enters through the riser holes, carrying liquid upwards along the jet plate to the baffle. Under the breaking action of the baffle, the liquid breaks into numerous small droplets, increasing the gas-liquid contact area, enhancing gas-liquid mass transfer, and improving separation efficiency. Furthermore, the gas and liquid phases are obstructed at the baffle, reducing their velocity and facilitating the condensation and fall of liquid entrained in the gas phase, reducing mist entrainment. In addition, the baffle can act as a liquid pusher, making it suitable for use in structures with long flow paths. The gas guide flanges on the jet plate control the gas direction, promote gas-liquid circulation on both sides, enhance mass transfer, and improve the tower plate's processing capacity.

[0031] This novel gas jet tray with an open baffle plate can handle 1.5-2.5 times the capacity of ordinary trays, with a pressure drop of approximately 30%-60% and a mist entrainment rate of approximately 60%-90% of that of rectangular float valves. Compared to vertical sieve trays, this tray effectively solves the problems of high pressure drop and limited application, while retaining the low mist entrainment rate and film-pulling mass transfer characteristics. Therefore, it has advantages such as high separation efficiency, good anti-clogging ability, and a wide operating range.

Claims

1. A novel gas injection tower plate with an open baffle, characterized in that, It mainly consists of air risers, gas injection plates, and baffles; A gas riser hole is provided on the tower plate, and a toothed edge is provided on the long side of the gas riser hole. A pair of injection plate mounting grooves are punched on the short side of the gas riser hole. A gas injection plate with a symmetrical structure is installed in the injection plate mounting groove. A baffle is provided on the gas injection plate.

2. A novel gas injection tower plate with an open baffle plate according to claim 1, characterized in that, The spray plate mounting groove has a symmetrical C-shaped structure or an asymmetrical structure, and the spray plate mounting groove is equipped with a fastening structure.

3. A novel gas injection tower plate with an open baffle plate according to claim 1, characterized in that, The baffle can be either an arc-shaped plate or a flat plate.

4. A novel gas injection tower plate with an open baffle plate according to claim 3, characterized in that, The curvature of the arc plate is between 10 and 180°.

5. A novel gas injection tower plate with an open baffle plate according to claim 3, characterized in that, The angle between the flat plate and the gas injection plate is between 10 and 180°.

6. A novel gas injection tower plate with an open baffle plate according to claim 1, characterized in that, A gas guide flange is provided on the gas injection plate.

7. A novel gas injection tower plate with an open baffle plate according to claim 6, characterized in that, The gas guide flange has a symmetrical structure.

8. A novel gas injection tower plate with an open baffle according to claim 6, characterized in that, Several gas guide flanges are stamped on the gas injection plate.

9. A novel gas injection tower plate with an open baffle plate according to claim 6, characterized in that, The gas guide flange can be rectangular or circular in shape, and the number of openings can be 1-10.

10. A novel gas injection tower plate with an open baffle according to claim 1, characterized in that, The long side of the air vent has a toothed edge of any shape, such as a serration, a semicircle, or a trapezoid.

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