A point-to-point mass transfer tray

Abstract

The utility model relates to chemical separation equipment technical field discloses a kind of equal point mass transfer tray, including first tray, the first tray inner wall is provided with adjusting assembly;The adjusting assembly includes main downcomer, the main downcomer is fixedly connected in the first tray inner wall, the first tray outer wall is fixedly connected with a liquid collection slope, the main downcomer outer wall is fixedly connected with second tray, strip flow guide groove is all set up in the airflow ascending channel of the first tray and second tray outer wall, the second tray is set in the first tray lower surface, the main downcomer one end is fixedly connected with flange, the main downcomer outer wall is fixedly connected with multiple branch downcomer branch pipe.In the utility model, by setting adjusting assembly in the first tray, the accurate distribution and independent adjustment control of liquid are realized, through butterfly valve and flow sensor synergies, can be according to the working condition requirement of different mass transfer unit to liquid flow real-time adjustment.

Description

Technical Field

[0001] This utility model relates to the field of chemical separation equipment technology, and in particular to a uniform point mass transfer tray. Background Technology

[0002] Mass transfer trays, as key components in gas-liquid mass transfer equipment, are widely used in chemical, petroleum, metallurgical, and environmental protection fields to achieve sufficient contact and mass exchange between the gas and liquid phases. The structure and liquid distribution of the trays directly affect the separation efficiency, energy consumption, and operational stability of the entire column. With the development of more refined and energy-efficient processes, the requirements for uniform liquid distribution, mass transfer area utilization, and liquid phase renewal rate within the trays are constantly increasing. Especially in large distillation or absorption columns, achieving efficient uniform point mass transfer through structural optimization has become one of the key research directions.

[0003] Existing mass transfer trays typically employ sieve trays, valve trays, or bubble cap trays. They primarily utilize perforations in the tray to allow the gas phase to pass through the liquid layer from bottom to top, ensuring sufficient contact and mass transfer. Liquid transfer occurs between trays via overflow weirs and downcomers located on the tray surface. The downcomers evenly guide liquid from the upper tray to the lower tray, maintaining a continuous gas-liquid exchange process. In traditional designs, the number and arrangement of downcomers are determined by the column diameter and load, and can be single or multiple to balance liquid flow and prevent flooding. The overall structure demonstrates good technological maturity and manufacturing reliability, meeting the needs of most industrial applications.

[0004] However, under complex operating conditions, traditional downcomer designs, whether single or multiple downcomers, have limitations, namely, they struggle to effectively overcome the problem of low overall mass transfer efficiency. Due to localized uneven liquid distribution on the tray surface and along the flow path, insufficient gas-liquid contact intensity in some areas leads to an imbalance in the utilization rate of the mass transfer units, thus affecting the overall mass transfer performance and separation effect of the entire tray. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a uniform point mass transfer tray, which aims to improve the problems of uneven liquid distribution, low local gas-liquid contact efficiency, and low overall mass transfer efficiency in traditional downcomer structures, whether using a single downcomer design or a multi-downcomer design.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a uniform mass transfer tray, comprising: a first tray, wherein an adjustment component is provided on the inner wall of the first tray; The regulating assembly includes a main downcomer, which is fixedly connected to the inner wall of a first tray. A liquid collection slope is fixedly connected to the outer wall of the first tray. A second tray is fixedly connected to the outer wall of the main downcomer. Strip-shaped guide grooves are provided in the airflow ascending channels on the outer walls of both the first and second trays. The second tray is located on the lower surface of the first tray. A flange is fixedly connected to one end of the main downcomer. Multiple branch downcomers are fixedly connected to the outer wall of the main downcomer. A butterfly valve is installed inside each branch downcomer. A flow sensor is installed inside each branch downcomer. The butterfly valve is located to the left of the flow sensor.

[0007] Furthermore, the outer wall of the branch downcomer is also provided with a flow guiding component, which includes a flow guiding plate disposed on the outer wall of the branch downcomer.

[0008] Furthermore, a connecting plate is fixedly connected to the outer wall of the branch downpipe, and a hinge is fixedly connected to one end of the connecting plate.

[0009] Furthermore, the other end of the hinge is fixedly connected to the outer wall of the guide plate, and the guide plate is located below the branch downcomer pipe.

[0010] Furthermore, the inner wall of the branch downpipe is threaded with a threaded rod, one end of which is rotatably connected to the surface of the guide plate.

[0011] Furthermore, the second tray has multiple sets of vent holes inside, and each set of vent holes has a serrated metal plate fixedly connected to its outer wall.

[0012] Furthermore, a splash guard is fixedly connected to the outer wall of the second tray, and another liquid collection slope is fixedly connected to the outer wall of the second tray.

[0013] Furthermore, the guide plate is positioned above the second tray.

[0014] This utility model has the following beneficial effects: 1. In this utility model, by setting an adjustment component in the first tray, precise liquid distribution and independent adjustment control are achieved. The main downcomer is connected to the branch downcomer. Through the coordinated action of the butterfly valve and the flow sensor, the liquid flow rate can be adjusted in real time according to the operating conditions of different mass transfer units, making the liquid distribution in each zone more uniform. This structure effectively avoids the situation in traditional trays where the liquid flow rate is constrained by fixed pipelines and cannot be finely controlled for different areas, ensuring that the liquid load of each mass transfer unit is consistent, thereby significantly improving the overall gas-liquid contact efficiency and mass transfer stability.

[0015] 2. In this utility model, by setting a flow guiding component, the stable distribution of liquid and enhanced mass transfer are achieved. Its adjustable structure allows the inclination angle of the flow guiding plate to be flexibly adjusted within a certain range, which can effectively buffer the falling speed of the liquid and prevent splashing. The liquid is evenly introduced into the strip-shaped flow guiding groove on the surface of the second tray through the flow guiding plate. Combined with the serrated metal plate set on the outer wall of the gas flow channel, the rising airflow forms turbulence and disturbance when passing through, which enhances the renewal effect of the gas-liquid interface and improves the mass transfer rate. At the same time, the anti-splash baffle can prevent droplets from being entrained and rising, causing liquid phase loss, and ensuring the stable operation of the mass transfer process inside the tray. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of a uniform point mass transfer tray proposed in this utility model. Figure 2 This is a schematic diagram of the branch downcomer section of a uniform point mass transfer tray proposed in this utility model. Figure 3 This is a schematic diagram of the flow sensor part of a uniform mass transfer tray proposed in this utility model. Figure 4 This is a schematic diagram of the serrated metal plate portion of a uniform point mass transfer tray proposed in this utility model.

[0017] Legend: 1. Regulating assembly; 101. First tray; 102. Liquid collection slope; 103. Main downcomer; 104. Flange; 105. Branch downcomer; 106. Second tray; 107. Strip guide channel; 108. Flow sensor; 109. Butterfly valve; 2. Flow guiding assembly; 201. Connecting plate; 202. Hinge; 203. Guide plate; 204. Threaded rod; 205. Serrated metal plate; 206. Anti-splash baffle. Detailed Implementation

[0018] Reference Figure 1 - Figure 4 An embodiment of the present invention is provided: a uniform point mass transfer tray, comprising: a first tray 101, the first tray 101 being an upper tray structure, undertaking the functions of liquid mass transfer and collection; after the liquid completes mass transfer with the gas on the tray surface, it flows to the tray edge outlet through the liquid collection slope 102; and an adjustment component 1 is provided on the inner wall of the first tray 101. The regulating component 1 includes a main downcomer 103, which vertically penetrates the center of the tower body to receive liquid from the upper tray and transport it downwards. The upper end of the main downcomer 103 is sealed to the liquid outlet of the upper tray via a flange 104 to prevent liquid leakage. Its lower end is connected to several branch downcomer pipes 105 to achieve zoned distribution of liquid. The main downcomer 103 is fixedly connected to the inner wall of the first tray 101. A liquid collection slope 102 is fixedly connected to the outer wall of the first tray 101. A second tray 106 is fixedly connected to the outer wall of the main downcomer 103. The second tray 106 is a lower mass transfer structure, and several sets of airflow rising channels and strip guide grooves 107 are evenly arranged on its surface. The airflow rising channels on the outer walls of both the first tray 101 and the second tray 106 are provided with... A strip-shaped flow guide trough 107 is provided. The second tray 106 is located on the lower surface of the first tray 101. A flange 104 is fixedly connected to one end of the main downcomer 103. Multiple branch downcomer pipes 105 are fixedly connected to the outer wall of the main downcomer 103. The branch downcomer pipes 105 are radially distributed on the middle and lower side wall of the main downcomer 103. The number of branch downcomer pipes 105 is consistent with the number of airflow rising channels of the lower second tray 106. They are used to evenly distribute the liquid to each mass transfer area. A butterfly valve 109 is installed inside the branch downcomer pipe 105. A flow sensor 108 is installed inside the branch downcomer pipe 105. The flow sensor 108 is installed downstream of the butterfly valve 109 of each branch downcomer pipe 105. It is used to detect the liquid flow signal in real time. The butterfly valve 109 is located to the left of the flow sensor 108.

[0019] Specifically, the first tray 101 serves the function of liquid mass transfer and collection. Liquid flows down from the previous tray and undergoes gas-liquid contact and mass transfer on the first tray 101. The liquid is evenly spread on the surface of the first tray 101. A liquid collection slope 102 is provided at the edge of the first tray 101, and its surface is slightly inclined towards the outer edge of the tray, so that the liquid automatically converges towards the tower wall to eliminate liquid stagnation in the center of the tray. The main downcomer 103 is vertically arranged in the center of the tower body to guide the liquid into the lower distribution device. A flange 104 is provided at the upper end of the main downcomer 103 to ensure stable sealing. After being evenly distributed inside the main downcomer 103, the liquid enters several branch downcomers. Pipe 105 has radially distributed branches, the number of which corresponds to the number of airflow ascending channels on the second tray 106, forming a one-to-one liquid phase distribution system. Each branch downcomer 105 is equipped with a flow sensor 108 and a butterfly valve 109 at its end, forming an independent adjustment structure. The flow sensor 108 realizes real-time monitoring of liquid flow, and the butterfly valve 109 is used to control the liquid flow rate. Operators can independently adjust the flow rate according to the needs of each mass transfer zone, thereby achieving precise control and uniform distribution of liquid phase. This structure allows the liquid to spread evenly on the second tray 106, with sufficient gas-liquid contact, and the overall mass transfer process of the tray is stable and efficient.

[0020] Reference Figure 1 - Figure 4 The outer wall of the branch downcomer 105 is also provided with a flow guiding component 2, which includes a flow guiding plate 203. The flow guiding plate 203 is an arc-shaped metal plate, which is installed at an angle below the outlet of the branch downcomer 105. It is used to receive the liquid flowing out of the branch outlet and guide it to flow smoothly in a set direction to the strip-shaped flow guiding groove 107 area of ​​the second tray 106, so as to prevent the liquid from directly impacting the tray surface and causing splashing or uneven liquid film. The flow guiding plate 203 is set on the outer wall of the branch downcomer 105. A connecting plate 201 is fixedly connected to the outer wall of the branch downpipe 105. A hinge 202 is fixedly connected to one end of the connecting plate 201. One end of the hinge 202 is located at the other end of the connecting plate 201, and the other end of the hinge 202 is connected to one end of the guide plate 203 to achieve an adjustable angle rotation connection of the guide plate 203. The other end of the hinge 202 is fixedly connected to the outer wall of the guide plate 203. The guide plate 203 is located below the branch downpipe 105. The column of the wall is threaded with a threaded rod 204. The column is isolated from the branch downcomer 105. One end of the threaded rod 204 is rotatably connected to the upper surface of the guide plate 203. Multiple sets of vent holes are opened inside the second tray 106. A serrated metal plate 205 is fixedly connected to the outer wall of each set of vent holes. The serrated metal plate 205 is arranged in a ring outside the airflow rising channel to disturb the rising airflow, so that it forms a turbulent zone when passing through, breaks the liquid film stagnant layer, strengthens the gas-liquid contact interface, and significantly improves the mass transfer efficiency. A splash baffle 206 is fixedly connected to the outer wall of the second tray 106. The splash baffle 206 is vertically installed on the periphery of the second tray 106, and its height is higher than the liquid level and turbulent zone. It is used to block the upward splashing of droplets or mist generated during the gas-liquid interaction, avoid entraining liquid into the upper tray, and ensure the stable operation of the device. Another liquid collection slope 102 is fixedly connected to the outer wall of the second tray 106. The guide plate 203 is set above the second tray 106.

[0021] Specifically, the liquid distributed by the branch downcomer 105 flows to the flow guiding assembly 2 above the second tray 106. The flow guiding assembly 2 consists of a connecting plate 201, a hinge 202, a flow guide plate 203, a threaded rod 204, a serrated metal plate 205, and an anti-splash baffle 206. The flow guide plate 203 is located below the branch outlet and its tilt angle can be adjusted by the threaded rod 204 to allow the liquid to flow smoothly down the inclined surface, avoiding direct impact on the tray surface and splashing. After being guided by the flow guide plate 203, the liquid flows evenly into the strip-shaped flow guide groove 107 area on the surface of the second tray 106, spreading orderly along the direction of the strip-shaped flow guide groove 107 and distributing around the airflow rising channel, covering the area with liquid. Uniform flow avoids back-mixing caused by cross-regional flow. Gas from the lower part of the tower rises through the airflow ascending channel and comes into full contact with the liquid in the guide groove area. Turbulence is formed under the disturbance of the serrated metal plate 205, which enhances the renewal rate of the gas-liquid interface and significantly improves the mass transfer efficiency. The fine droplets generated during the mass transfer process are effectively blocked by the anti-splash baffle 206 and fall back to the surface of the tower plate, preventing mist from affecting the upper layer operation. After sufficient mass transfer, the liquid flows outward along the surface of the second tower plate 106 to the liquid collection slope 102, and then enters the lower main downcomer 103 from the liquid outlet, realizing a continuous and stable gas-liquid mass transfer cycle, ensuring that the flow field is balanced and the device is stable during efficient operation.

[0022] Working principle: When the uniform point mass transfer tray is put into use, as shown in the figure, the whole device consists of two main parts: the regulating component 1 and the flow guiding component 2, which are responsible for the precise distribution of liquid phase and the uniform mixing of gas and liquid, respectively. First, after the mass transfer is completed, the liquid in the first tray 101 flows outward along the liquid collection slope 102 on the surface of the tray. Under the action of gravity, the liquid enters the main downcomer 103 through the liquid outlet at the edge of the tray. The main downcomer 103 vertically penetrates the center of the tower body, and its upper end is sealed to the liquid outlet of the upper tray through the flange 104 to prevent liquid leakage. After the liquid enters the main downcomer 103, it is evenly distributed to several branch downcomers 105. These branch downcomers extend radially from the side wall of the main downcomer 103, and their number is consistent with the number of airflow rising channels on the second tray 106, achieving one-to-one liquid phase distribution. Each branch downcomer is equipped with a flow sensor 108 and a butterfly valve 109. The flow sensor 108 monitors the liquid flow signal in real time. According to the mass transfer requirements of each area, the operator can adjust the opening of the butterfly valve 109 to achieve independent control of the liquid flow of each mass transfer unit, thereby ensuring the uniform distribution of liquid on the second tray 106. Secondly, the liquid distributed by the branch downcomer 105 flows to the flow guiding assembly 2 above the second tray 106. The flow guiding assembly 2 includes a connecting plate 201, a hinge 202, a flow guide plate 203, a threaded rod 204, a serrated metal plate 205, and a splash guard 206. The outer wall of the branch downcomer 105 is fixedly connected to the connecting plate 201. The flow guide plate 203 is rotatably connected to the connecting plate 201 through the hinge 202. Its inclination angle can be adjusted by the threaded rod 204. The threaded rod 204 passes through the branch downcomer 105 and is connected to the flow guide plate 203. The adjustment range is 30 degrees to 60 degrees. After the liquid flows out from the branch outlet, it is first received by the flow guide plate 203 and flows down smoothly along its inclined surface, thereby preventing the liquid from falling directly onto the tray surface and causing impact or splashing. After being guided by the guide plate 203, the liquid flows to the corresponding strip guide groove 107 area on the second tray 106. The strip guide groove 107 guides the liquid to diffuse orderly on the tray surface, so that the liquid is evenly distributed around the group of gas flow rising channels, avoiding back mixing caused by the liquid flowing across regions. At the same time, the gas from the lower part of the tower rises through the gas flow rising channel and comes into contact with the liquid near the guide groove. When the gas flows through the serrated metal plate 205 surrounding the outside of the channel, the gas flow splits and becomes turbulent due to the shape disturbance, forming strong turbulence on the liquid surface, breaking the liquid film stagnant layer, enhancing the renewal rate of the gas-liquid interface, and thus significantly improving the mass transfer efficiency. During the gas-liquid interaction process, some gas flow may carry small droplets and splash upwards. At this time, the anti-splash baffle 206 set around the outer edge of the tray plays a blocking role, causing the droplets to fall back to the surface of the tray and preventing mist from entering the upper tray. After sufficient mass transfer, the liquid flows outward along the surface of the second tray 106 and flows back into the liquid collection slope 102 at the edge of the tray. Then, it enters the next layer of main downcomer 103 through the liquid outlet, realizing a continuous, stable, and efficient gas-liquid mass transfer cycle.

[0023] In summary, this structure achieves precise liquid distribution and adjustable control through the regulating component 1, and completes the smooth guidance of the liquid and enhanced gas-liquid mass transfer through the flow guiding component 2. At the same time, in conjunction with the strip-shaped flow guide trough 107, the serrated metal plate 205 and the anti-splash baffle 206, a multi-stage gas-liquid disturbance and reflux control device is formed, which makes the gas-liquid distribution in the tray more uniform and significantly improves the mass transfer rate.

Claims

1. A uniform-point mass transfer tray, comprising: The first tray (101) is characterized in that an adjustment component (1) is provided on the inner wall of the first tray (101). The regulating component (1) includes a main downcomer (103), which is fixedly connected to the inner wall of a first tray (101). A collection slope (102) is fixedly connected to the outer wall of the first tray (101). A second tray (106) is fixedly connected to the outer wall of the main downcomer (103). Strip-shaped guide grooves (107) are provided in the airflow rising channels of the outer walls of the first tray (101) and the second tray (106). (106) is set on the lower surface of the first tray (101). One end of the main downcomer (103) is fixedly connected to a flange (104). Multiple branch downcomers (105) are fixedly connected to the outer wall of the main downcomer (103). A butterfly valve (109) is installed inside the branch downcomer (105). A flow sensor (108) is installed inside the branch downcomer (105). The butterfly valve (109) is located to the left of the flow sensor (108).

2. The uniform point mass transfer tray according to claim 1, characterized in that: The outer wall of the branch downpipe (105) is also provided with a flow guiding component (2), the flow guiding component (2) includes a flow guiding plate (203), the flow guiding plate (203) is provided on the outer wall of the branch downpipe (105).

3. A uniform point mass transfer tray according to claim 2, characterized in that: A connecting plate (201) is fixedly connected to the outer wall of the branch downpipe (105), and a hinge (202) is fixedly connected to one end of the connecting plate (201).

4. A uniform-point mass transfer tray according to claim 3, characterized in that: The other end of the hinge (202) is fixedly connected to the outer wall of the guide plate (203), which is located below the branch downcomer (105).

5. A uniform point mass transfer tray according to claim 4, characterized in that: The inner wall of the branch downpipe (105) is threaded with a threaded rod (204), one end of which is rotatably connected to the upper surface of the guide plate (203).

6. A uniform-point mass transfer tray according to claim 1, characterized in that: The second tray (106) has multiple sets of vent holes inside, and each set of vent holes has a serrated metal plate (205) fixedly connected to its outer wall.

7. A uniform-point mass transfer tray according to claim 6, characterized in that: The second tray (106) is fixedly connected to the outer wall of a splash guard (206), and another liquid collection slope (102) is fixedly connected to the outer wall of the second tray (106).

8. A uniform point mass transfer tray according to claim 2, characterized in that: The guide plate (203) is positioned above the second tower plate (106).

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