A new type of float valve tray

Abstract

The utility model discloses a novel float valve tray, including the liquid fall plate, the tray plate, the liquid receiving tray and the gas -liquid separation device, the tray plate is opened with the board hole, and the float valve is installed on the board hole. The gas -liquid separation device is double -deck formula, and the upper layer is silk screen, and the lower layer is the filler block, the gas -liquid separation device is located tray plate top, and covers all board holes on the tray plate. The double -deck separation structure of gas -liquid separation device can effectively avoid the mist into the upper tray, ensure the stable maintenance of concentration difference in the mass transfer process, create good conditions for the full contact of gas -liquid two -phase and mass transfer, thereby significantly improve the mass transfer efficiency, realize the efficient operation of mass transfer process.

Description

Technical Field

[0001] This utility model belongs to the technical field of chemical mass transfer equipment. It relates to structural improvements of floating valve trays, specifically a novel floating valve tray. Background Technology

[0002] A valve train is a type of tower equipment. Its application originated in the 1950s. Several floating valves are installed on its trays, allowing gas and liquid to fully contact and mix on the trays, thus achieving mass transfer. Valve trains are widely used in the petroleum, chemical, and pharmaceutical industries due to their high production capacity, high operational flexibility, and high tray efficiency.

[0003] Currently, valve trains remain one of the most widely used types of tower equipment. With technological advancements and the emergence of innovative valve designs, the market demand for valve trains will continue to grow. However, problems arising in their application cannot be ignored. For example, under certain operating conditions—such as low liquid-to-gas ratios or high empty tower gas velocities—increased entrainment and low mass transfer efficiency occur. Existing technologies typically address these issues by increasing tray spacing, increasing tower height, connecting towers in series, or reducing gas velocity. However, this also leads to increased manufacturing costs and larger footprint. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model aims to provide a new type of floating valve tower tray.

[0005] The technical solution of this utility model to solve the aforementioned technical problem is to provide a novel floating valve tray, including a downcomer plate, a tray plate, a receiving tray, and a gas-liquid separation device; the downcomer plate is fixed to the inner wall of the tower shell; the receiving tray is fixed to the inner wall of the tower shell; the tray plate is fixed to the inner wall of the tower shell; the tray plate is connected to the downcomer plate and the receiving tray respectively; the tray plate has perforations; and floating valves are installed in the perforations.

[0006] The feature is that the tray further includes a gas-liquid separation device; the gas-liquid separation device is a double-layer type, with the upper layer being a wire mesh and the lower layer being a packing block; the gas-liquid separation device is located above the tray plate; the gas-liquid separation device is detachably fixed to the tray plate, and there are gaps between the gas-liquid separation device and the upper and lower tray plates, and it covers all the plate holes on the tray plate.

[0007] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0008] (1) Mass transfer efficiency is significantly improved.

[0009] This invention features a gas-liquid separation device with a double-layer separation structure. When gas carrying droplets passes through the device, it first passes through a packing block layer, where large droplets are initially intercepted. As the droplets flow through the pores of the packing block, inertia causes them to deviate from their streamlines, colliding with and being adsorbed onto the packing block surface, thus achieving partial droplet separation. The gas, after initial separation in the packing block layer, enters a wire mesh layer. The wire mesh has a denser pore structure, enabling fine filtration of smaller droplets and mist. The capillary action and surface tension of the wire mesh cause tiny droplets to coalesce into larger droplets. When the weight of a droplet exceeds the carrying capacity of the gas, it settles, achieving separation. This double-layer separation effectively prevents mist from entering the upper tray, ensuring a stable concentration gradient during mass transfer and creating favorable conditions for sufficient contact and mass transfer between the gas and liquid phases, thereby significantly improving mass transfer efficiency and achieving highly efficient operation of the mass transfer process.

[0010] (2) It is highly adaptable and has low energy consumption.

[0011] This invention features a gas-liquid separation device. This device employs a two-layer separation mechanism, combining gravity and adsorption-coagulation principles to adapt to gas-liquid mixtures with high liquid content or complex compositions, and can handle various operating conditions. It requires no additional energy consumption and can operate stably for extended periods.

[0012] (3) Significant cost optimization advantages.

[0013] Thanks to the application of a gas-liquid separation device, this new type of tray effectively suppresses mist entrainment, leading to a series of improvements: tray spacing does not need to be increased, the tower diameter can be reduced accordingly, gas flow rate can be increased, and the number of float valves can be reduced. The packing blocks in this structure also reduce the risk of wire mesh clogging, effectively extending the device's service life. The device's double-layer structure is a detachable design, simplifying installation and maintenance. These optimized designs reduce raw material usage and processing complexity from multiple dimensions, effectively saving manufacturing costs and enhancing the product's economic competitiveness.

[0014] (4) It has a wide range of application scenarios.

[0015] This new type of tower tray provides a reliable and efficient solution for production needs in various scenarios, demonstrating broad application prospects. The packing blocks of the gas-liquid separation unit in this new tower tray can be adjusted in real time according to the tower diameter and process requirements, flexibly adapting to various tower types. It offers significant advantages in various industries, such as atmospheric and vacuum distillation units in the oil refining industry, distillation and absorption units in the chemical industry, solvent recovery and pharmaceutical intermediate separation in the pharmaceutical industry, and alcohol production and oil refining in the food industry. Furthermore, whether it's a new construction project or a retrofit of an existing project, as long as basic installation conditions are met, its performance advantages can be fully realized. Attached Figure Description

[0016] Figure 1This is a front view schematic diagram of the floating valve tray of this utility model;

[0017] Figure 2 This is a top view schematic diagram of the novel floating valve tray of this utility model;

[0018] Figure 3 This is a front view of the gas-liquid separation device in the novel floating valve tray of this utility model;

[0019] Figure 4 This is a top view of the gas-liquid separation device in the novel floating valve tray of this utility model;

[0020] In the diagram: 1. Shell; 2. Downcomer; 3. Tray; 4. Gas-liquid separator; 5. Float valve plate hole; 6. Liquid receiving tray; 7. Float valve; 41. Wire mesh; 42. Packing block. Detailed Implementation

[0021] The present invention will be further described below with reference to the embodiments and accompanying drawings. The specific embodiments are only used to further illustrate the technical solution of the present invention and do not limit the scope of protection of the claims of this application.

[0022] This utility model provides a novel floating valve tray, including a shell 1, a downcomer 2, a tray plate 3, a gas-liquid separation device 4, a floating valve plate hole 5, a receiving tray 6, and a floating valve 7; the receiving tray 6 and the downcomer 2 are respectively located on both sides of the tray plate 3; the tray plate 3 has a floating valve plate hole 5; a floating valve 7 is installed on the floating valve plate hole 5, and there is a gap between the floating valve 7 and the tray plate 3; the downcomer 2 is vertically fixed to the inner wall of the shell; the receiving tray 6 is horizontally fixed to the inner wall of the shell; the tray plate 3 is fixed to the inner wall of the shell; the tray plate 3 is connected to the downcomer 2 and the receiving tray 6 respectively.

[0023] A further feature of the tray of this utility model is that the tray also includes a gas-liquid separation device 4, which has a double-layer structure: the upper layer is a wire mesh 41 and the lower layer is a packing block 42. The gas-liquid separation device 4 is detachably fixed on the tray plate 3. There is a gap between the gas-liquid separation device 4 and the tray plate 3, and it covers all the floating valve plate holes 5 on the tray plate 3.

[0024] In an optional embodiment, the packing block 42 can be either a grid or a corrugated plate, as long as it meets the process requirements of that embodiment.

[0025] In an optional embodiment, the float valve plate hole 5 can be selected from various forms such as round or square.

[0026] Preferably, the gap between the gas-liquid separation device 4 and the tray 3 is 50mm-1200mm.

[0027] The working principle and workflow of this utility model are as follows: Liquid flows from the downcomer plate of the upper tray to the receiving tray 6 of this tray, then from the receiving tray 6 through the tray 3, and then to the downcomer plate 2 of this tray; when the liquid flows through the tray 3, the float valve 7 on the tray 3 is submerged in the liquid; at the same time, the gas rises and passes through the float valve plate hole 5 of the tray 3, and disperses horizontally under the action of the float valve 7, bubbling out through the liquid layer; with the bubbling action of the gas, the liquid is dispersed into fine droplets, which gather on the tray 3 and then flow to the downcomer plate 2; while the gas carrying droplets and mist will continuously rise to the upper tray, in this process the gas first In the gas-liquid separation device 4, the gas first contacts the packing block 42. The liquid droplets are effectively blocked by the curved path of the packing block 42 and flow down along the packing block 42 under the action of gravity, returning to the tray 3. The gas with a small number of liquid droplets then rises and passes through the wire mesh 41 in the gas-liquid separation device 4, so that smaller droplets and mist are captured. The gas continues to rise through the floating valve holes of the upper tray. If any gas that has not passed through the gas-liquid separation device 4 rises from the side, it will also be blocked by the upper liquid receiving tray and will not be able to continue rising. This effectively avoids the entrainment of gas mist, improves the mass transfer efficiency, and ensures the final product quality.

[0028] Any aspects not covered in this utility model are applicable to the prior art.

Claims

1. A novel floating valve tray, characterized in that, The tray includes a downcomer, a tray plate, a receiving tray, and a gas-liquid separation device; the downcomer is fixed to the inner wall of the tower shell; the receiving tray is fixed to the inner wall of the tower shell; the tray plate is fixed to the inner wall of the tower shell; the tray plate is connected to the downcomer and the receiving tray respectively; the tray plate has perforations; and float valves are installed on the perforations. The gas-liquid separator is a double-layer type, with a wire mesh upper layer and a packing block lower layer. The gas-liquid separator is located above the tray plate. The gas-liquid separator is detachably fixed to the tray plate, and there are gaps between the gas-liquid separator and the upper and lower tray plates, covering all the plate holes on the tray plate.

2. The novel floating valve tray according to claim 1, characterized in that, The packing block can be either a grid or a corrugated plate, as long as it meets the process requirements in its implementation.

3. The novel floating valve tray according to claim 1, characterized in that, The float valve plate hole can be either round or square.

4. The novel floating valve tray according to claim 1, characterized in that, The gap between the gas-liquid separator and the tray is 50mm-1200mm.

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