Plate tower for testing mass transfer efficiency of plate valve

Abstract

The utility model discloses a plate tower for testing the mass transfer efficiency of a plate valve, and belongs to the technical field of plate towers, the plate tower comprises a tower body, tower plates, an overflow weir, a liquid receiving disc and a downcomer, the tower body is a circular cylinder; the device is novel in design and ingenious, the mass transfer efficiency of the plate valve is tested through scouring of gas and liquid, the gas is carbon dioxide from bottom to top, the liquid is water from top to bottom, the mass transfer efficiency of the plate valve is tested, in the working process of the valve plate, the gas penetrates through a valve hole and overflows from a backlash between a valve plate and a tower plate, and the working efficiency of the plate valve is improved. In the testing process, the sensor is arranged on the discharging pipe to sense the discharging pressure of the liquid in the discharging pipe, so that the gas and the liquid on the tower plate are subjected to gas-liquid contact and mass transfer, and the purpose of separating the liquid mixture or the gas mixture component is achieved. The air inlet amount is controlled through the first electromagnetic valve on the air inlet pipe, and the liquid inlet amount is controlled through the second electromagnetic valve on the feeding pipe, so that the flooding phenomenon is avoided, and safety accidents are avoided.

Description

Technical Field

[0001] This application relates to the technical field of plate columns, and particularly relates to a plate column for testing the mass transfer efficiency of plate valves. Background Art

[0002] A plate column is a separation device widely used in industries such as chemical engineering, petroleum, and pharmaceuticals. It is mainly used to achieve the mass transfer process between gas and liquid phases for purposes such as separation, absorption, and rectification. A plate column consists of a tower body, tower plates, a feed inlet, a discharge outlet, a gas inlet, and an outlet, etc. Multiple layers of tower plates are arranged inside the tower body, and gas-liquid contact elements such as sieve holes, bubble caps, and float valves are distributed on the tower plates to promote the full contact and mass transfer between gas and liquid phases.

[0003] The working principle of a plate column is as follows: Gas enters from the bottom of the tower, rises through the gas-liquid contact elements on the tower plates, and countercurrently contacts the liquid entering from the top of the tower. During the contact process, the light components in the gas phase transfer to the liquid phase, and the heavy components in the liquid phase transfer to the gas phase, thereby achieving the separation of gas and liquid phases. The liquid on the tower plates flows downward layer by layer through the overflow pipes and finally discharges from the bottom of the tower, while the gas discharges from the top of the tower.

[0004] The factors to be considered in the design and operation of a plate column include tower plate spacing, tower plate type, number of tower plates, feed position, gas-liquid flow ratio, operating pressure, and temperature, etc. Reasonable design and operation can improve separation efficiency, reduce energy consumption, extend equipment life, help optimize the operating conditions of the plate column, and improve mass transfer efficiency.

[0005] Therefore, this application proposes a plate column for testing the mass transfer efficiency of plate valves. Utility Model Content

[0006] A plate column for testing the mass transfer efficiency of plate valves proposed by this application is to solve the problems proposed in the above background art; the mass transfer efficiency of the plate valve is tested through the scouring of gas and liquid. The gas is carbon dioxide flowing from bottom to top, and the liquid is water flowing from top to bottom to test the mass transfer efficiency of the plate valve. The efficiency is calculated by how much carbon dioxide is dissolved through scouring. The size of the tower diameter affects the separation efficiency. During the working process of the valve plate, gas passes through the valve holes and overflows from the side gaps between the valve sheets and the tower plate, so that the gas and the liquid on the tower plate undergo gas-liquid contact and mass transfer, and further achieve the purpose of separating the components of liquid mixtures or gas mixtures. Moreover, during the testing process, by setting sensors on the discharge pipe to sense the liquid discharge pressure in the discharge pipe, controlling the intake air volume through the first solenoid valve on the intake pipe, and controlling the liquid intake volume through the second solenoid valve on the feed pipe, the phenomenon of flooding is avoided, and thus safety accidents are avoided.

[0007] In order to achieve the above purpose, this application adopts the following technical solutions:

[0008] A plate column for testing the mass transfer efficiency of a plate valve, comprising a column body, tower plates, overflow weirs, liquid receiving trays and downcomers. The column body is a circular cylinder, and multiple tower plates are arranged inside the column body. Each tower plate is provided with gas and liquid phase channels, including overflow weirs, liquid receiving trays and downcomers, and the overflow weirs, liquid receiving trays and downcomers are respectively arranged on the tower plates.

[0009] As a preferred embodiment, an inlet pipe is arranged on one side inside the column body. The inlet pipe is a circular pipe and is used for gas to enter.

[0010] The gas enters the column body through the inlet pipe, which serves to reduce the gas flow resistance and improve the gas intake capacity, thereby enhancing the practicality of the device.

[0011] As a preferred embodiment, an outlet pipe is arranged at the top inside the column body. The outlet pipe is a circular pipe and is used for gas to be discharged.

[0012] Through the outlet pipe, the gas, which is carbon dioxide, flows from bottom to top to test the mass transfer efficiency of the plate valve, thereby enhancing the practicality of the device.

[0013] As a preferred embodiment, a feed pipe is arranged on one side inside the column body and away from the inlet pipe. The feed pipe is used for liquid to enter.

[0014] Through the feed pipe, the mass transfer efficiency of the plate valve is tested by the scouring of gas and liquid. The liquid is water flowing from top to bottom to test the mass transfer efficiency of the plate valve. The efficiency is calculated by the amount of carbon dioxide dissolved through scouring. The size of the column diameter affects the separation efficiency, thereby enhancing the practicality of the device.

[0015] As a preferred embodiment, a discharge pipe is arranged at the bottom inside the column body. The discharge pipe is used for liquid to be discharged. A reflux pipe is arranged inside the column body and above the inlet pipe.

[0016] Through the discharge pipe, the liquid, which is water, flows from top to bottom to test the mass transfer efficiency of the plate valve, thereby enhancing the practicality of the device.

[0017] As a preferred embodiment, valve plates are arranged above each tower plate inside the column body. Multiple valve holes are opened inside each valve plate, and valve pieces are arranged on the outside of each valve plate.

[0018] The gas passes through the valve holes and overflows from the side gaps between the valve pieces and the tower plate, so that the gas and the liquid on the tower plate are in gas-liquid contact and mass transfer, and further achieve the purpose of separating the components of the liquid mixture or gas mixture, thereby enhancing the practicality of the device.

[0019] As a preferred embodiment, a sensor is provided outside the discharge pipe, and the sensor is used to monitor the liquid discharge pressure in the discharge pipe;

[0020] By providing a sensor on the discharge pipe to sense the liquid discharge pressure in the discharge pipe, the practicability of the device is improved.

[0021] As a preferred embodiment, a first solenoid valve and a second solenoid valve are respectively provided on the intake pipe and the feed pipe, and the first solenoid valve and the second solenoid valve are respectively used to control the intake amounts of gas and liquid;

[0022] By controlling the intake gas amount through the first solenoid valve on the intake pipe and the intake liquid amount through the second solenoid valve on the feed pipe, the phenomenon of flooding is avoided, and thus safety accidents are avoided, thereby improving the practicability of the device.

[0023] Advantages of the present application:

[0024] 1. For the plate column for testing the mass transfer efficiency of the plate valve, during the operation of the valve plate, gas passes through the valve holes and overflows from the side gaps between the valve pieces and the tray, so that the gas and the liquid on the tray are in gas-liquid contact and mass transfer, and thus the purpose of separating the components of the liquid mixture or gas mixture is achieved. Moreover, during the test, by providing a sensor on the discharge pipe to sense the liquid discharge pressure in the discharge pipe, controlling the intake gas amount through the first solenoid valve on the intake pipe and the intake liquid amount through the second solenoid valve on the feed pipe, the phenomenon of flooding is avoided, and thus safety accidents are avoided, greatly improving the practicability of the device;

[0025] 2. For the plate column for testing the mass transfer efficiency of the plate valve, the mass transfer efficiency of the plate valve is tested by the scouring of gas and liquid. The gas is carbon dioxide flowing from bottom to top, and the liquid is water flowing from top to bottom to test the mass transfer efficiency of the plate valve. The efficiency is calculated by the amount of carbon dioxide dissolved by scouring. The size of the column diameter affects the separation efficiency, greatly improving the practicability of the device. Brief Description of the Drawings

[0026] Figure 1 It is a main body schematic diagram of the device of the present application;

[0027] Figure 2 It is an internal schematic diagram of the device of the present application;

[0028] Figure 3 It is a partial schematic diagram of the device of the present application.

[0029] Reference numerals in the figure: 1, tower body; 2, tray; 3, overflow weir; 4, liquid receiving tray; 5, downcomer; 6, inlet pipe; 7, outlet pipe; 8, feed pipe; 9, discharge pipe; 10, reflux pipe; 11, valve plate; 12, valve hole; 13, valve disc; 14, sensor; 15, first solenoid valve; 16, second solenoid valve. Specific embodiments

[0030] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0031] Refer to Figures 1-3 , a plate column for testing the mass transfer efficiency of plate valves, including a tower body 1, a tray 2, an overflow weir 3, a liquid receiving tray 4 and a downcomer 5. The tower body 1 is a circular cylinder, and multiple trays 2 are arranged inside the tower body 1. Each tray 2 is provided with gas and liquid channels, including an overflow weir 3, a liquid receiving tray 4 and a downcomer 5. The overflow weir 3, the liquid receiving tray 4 and the downcomer 5 are respectively arranged on the tray 2.

[0032] An inlet pipe 6 is arranged on one side inside the tower body 1. The inlet pipe 6 is a circular pipe for gas to enter. By means of the inlet pipe 6, gas enters the tower body 1, which reduces the gas flow resistance, improves the gas intake capacity, and thus enhances the practicality of the device.

[0033] An outlet pipe 7 is arranged at the top end inside the tower body 1. The outlet pipe 7 is a circular pipe for gas to be discharged. Through the outlet pipe 7, the gas is carbon dioxide flowing from bottom to top to test the mass transfer efficiency of the plate valve, thus enhancing the practicality of the device.

[0034] A feed pipe 8 is arranged on one side inside the tower body 1 and away from the inlet pipe 6. The feed pipe 8 is for liquid to enter. Through the feed pipe 8, the mass transfer efficiency of the plate valve is tested by the flushing of gas and liquid. The liquid is water flowing from top to bottom to test the mass transfer efficiency of the plate valve. The efficiency is calculated by how much carbon dioxide is dissolved by the flushing. The size of the tower diameter affects the separation efficiency, thus enhancing the practicality of the device.

[0035] A discharge pipe 9 is arranged at the bottom end inside the tower body 1. The discharge pipe 9 is for liquid to be discharged. A reflux pipe 10 is arranged inside the tower body 1 and above the inlet pipe 6. Through the discharge pipe 9, the liquid is water flowing from top to bottom to test the mass transfer efficiency of the plate valve, thus enhancing the practicality of the device.

[0036] Inside the tower body 1 and above each tray 2, a valve plate 11 is provided. Inside each valve plate 11, a plurality of valve holes 12 are opened. On the outside of each valve plate 11, a valve piece 13 is provided. The gas passes through the valve holes 12 and overflows from the side gap between the valve piece 13 and the tray 2, so that the gas and the liquid on the tray 2 carry out gas-liquid contact and mass transfer, and further achieve the purpose of separating the components of the liquid mixture or gas mixture, thereby improving the practicability of the device.

[0037] A sensor 14 is provided outside the discharge pipe 9. The sensor 14 is used to monitor the liquid discharge pressure in the discharge pipe 9. By providing the sensor 14 on the discharge pipe 9 to sense the liquid discharge pressure in the discharge pipe 9, the practicability of the device is improved.

[0038] A first solenoid valve 15 and a second solenoid valve 16 are respectively provided on the inlet gas pipe 6 and the feed pipe 8. The first solenoid valve 15 and the second solenoid valve 16 are respectively used to control the inlet amounts of gas and liquid. By controlling the gas inlet amount through the first solenoid valve 15 on the inlet gas pipe 6 and controlling the liquid inlet amount through the second solenoid valve 16 on the feed pipe 8, the phenomenon of flooding is avoided, and further the occurrence of safety accidents is avoided, thereby improving the practicability of the device.

[0039] Working principle: The mass transfer efficiency of the plate valve is tested by the scouring of gas and liquid. The gas is carbon dioxide flowing from bottom to top, and the liquid is water flowing from top to bottom to test the mass transfer efficiency of the plate valve. The efficiency is calculated by scouring and dissolving a certain amount of carbon dioxide. The size of the tower diameter affects the separation efficiency.

[0040] During the working process of the valve plate 11, the gas passes through the valve holes 12 and overflows from the side gap between the valve piece 13 and the tray 2, so that the gas and the liquid on the tray 2 carry out gas-liquid contact and mass transfer, and further achieve the purpose of separating the components of the liquid mixture or gas mixture. And during the test process, by providing the sensor 14 on the discharge pipe 9 to sense the liquid discharge pressure in the discharge pipe 9, controlling the gas inlet amount through the first solenoid valve 15 on the inlet gas pipe 6 and controlling the liquid inlet amount through the second solenoid valve 16 on the feed pipe 8, the phenomenon of flooding is avoided, and further the occurrence of safety accidents is avoided.

[0041] The method for testing the mass transfer efficiency of a plate valve usually involves experimental studies. In these studies, a specific material system (such as cyclohexane - n - heptane) is used for total reflux operation in a distillation column. During the experiment, the effects of various factors on the mass transfer efficiency are investigated, including the kinetic factor of valve hole 12, the height of the outlet weir, the hole opening ratio, etc. Specifically, as the kinetic factor of valve hole 12 increases, the plate efficiency will increase to varying degrees. The kinetic factor reflects the energy of the gas passing through valve hole 12 and has a significant impact on the mass transfer efficiency. The increase in the height of the outlet weir usually leads to an increase in the plate efficiency. However, when the gas - liquid contact state changes to the spray state, the influence of the weir height on the plate efficiency will decrease. Within a certain range, an increase in the hole opening ratio may lead to a decrease in the plate efficiency. For example, within the hole opening ratio range of 8.47% to 15.68%, as the hole opening ratio increases, the plate efficiency may decline. The reflux temperature also affects the plate efficiency. For example, the plate efficiency of the second tray 2 is approximately 10% higher at a reflux temperature of 85°C than at 65°C. There are differences in the mass transfer efficiency of different types of trays 2 (such as corrugated - guided valve trays 2, F1 - type valve trays 2, sieve trays, etc.). Corrugated - guided valve trays 2 usually exhibit higher mass transfer efficiency. The gas - liquid contact state (foam state or spray state) also affects the mass transfer efficiency. The influence of the height of the overflow weir 3 on the plate efficiency is greater in the foam state and smaller in the spray state. The internal reflux (about 5%) caused by the heat loss of the distillation system also affects the mass transfer efficiency. In the experiment, the Murphree plate efficiency (dry - plate efficiency) is usually used to evaluate the mass transfer efficiency, and methods such as the AIChE mass transfer model are also used for data fitting to obtain key data. These research results provide a basis for industrial design and scale - up, helping to optimize the operating conditions of the plate column and improve the mass transfer efficiency.

[0042] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application, according to the technical solution of the present application and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present application.

Claims

1. A plate column for testing the mass transfer efficiency of a plate valve, comprising a column body (1), plates (2), overflow weirs (3), liquid receiving trays (4) and downcomers (5), characterized in that, The tower body (1) is a circular cylinder, and there are multiple layers of tower trays (2) arranged inside the tower body (1). Each layer of the tower tray (2) is provided with vapor and liquid channels, including an overflow weir (3), a liquid receiving tray (4), and a downcomer (5). The overflow weir (3), the liquid receiving tray (4), and the downcomer (5) are respectively arranged on the tower tray (2).

2. The plate column for testing the mass transfer efficiency of a plate valve, as described in claim 1, is characterized in that An air inlet pipe (6) is arranged on one side inside the tower body (1). The air inlet pipe (6) is a circular pipe and is used for gas to enter.

3. A plate column for testing the mass transfer efficiency of a plate valve, as described in claim 1, wherein An air outlet pipe (7) is arranged at the top end inside the tower body (1). The air outlet pipe (7) is a circular pipe and is used for gas to be discharged.

4. A plate column for testing the mass transfer efficiency of a plate valve, characterized in that, A feed pipe (8) is arranged on the side inside the tower body (1) and away from the air inlet pipe (6). The feed pipe (8) is used for liquid to enter.

5. The plate column for testing the mass transfer efficiency of a plate valve according to claim 2, characterized in that, A discharge pipe (9) is arranged at the bottom end inside the tower body (1). The discharge pipe (9) is used for liquid to be discharged. A reflux pipe (10) is arranged inside the tower body (1) and above the air inlet pipe (6).

6. The plate column for testing the mass transfer efficiency of a plate valve, as claimed in claim 1, wherein A valve plate (11) is arranged above each layer of the tower tray (2) inside the tower body (1). A plurality of valve holes (12) are formed inside each valve plate (11), and valve flakes (13) are arranged on the outer side of each valve plate (11).

7. A plate column for testing the mass transfer efficiency of a plate valve, characterized in that, A sensor (14) is arranged outside the discharge pipe (9). The sensor (14) is used to monitor the liquid discharge pressure in the discharge pipe (9).

8. A plate column for testing the mass transfer efficiency of a plate valve, characterized in that, according to claim 2, A first solenoid valve (15) and a second solenoid valve (16) are respectively arranged on the air inlet pipe (6) and the feed pipe (8). The first solenoid valve (15) and the second solenoid valve (16) are respectively used to control the intake amounts of vapor and liquid.

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