Device and method for visualizing the process of falling film absorption with variable inclination angle plate

Abstract

Disclosed is a device and method for visualizing a falling film absorption process of a plate with a variable inclination angle. In the device, a flat plate falling film absorber can be pivotally connected to an angle adjuster to adjust the inclination angle relative to the horizontal plane. A liquid distributor is arranged on the top of the housing to guide the liquid to be spread on the first surface and flow downward in the form of a liquid film. The cooling unit includes a cooling water inlet arranged at the bottom of the flat plate, a cooling water outlet arranged at the top of the flat plate, and a third electrically controlled valve for controlling the cooling water flow rate. The cooling water from the cooling water inlet flows along the second surface of the flat plate to the cooling water outlet to flow in the opposite direction of the liquid film flow. The shooting unit faces the first surface to generate flow image data of the liquid film. The device for visualizing the falling film absorption process of a plate with a variable inclination angle can change the absorption angle as a whole, and can be adjusted in the range of 0-90°. At the same time, it can combine images to present the three-dimensional flow state of the liquid film when the flat plate falling film flows.

Description

Technical Field

[0001] The invention relates to the technical field of liquid film flow monitoring, and in particular to a variable-inclination-angle plate-type falling film absorption process visualization device and method. Background Art

[0002] In the prior art, liquid film flow monitoring adopts a horizontal tube falling film absorption structure, which has complex structure, large structure size and low absorption efficiency, which restricts the performance improvement of absorption heat pumps. It cannot monitor the liquid film flow image at different inclination angles, and cannot monitor the liquid film flow conditions under different parameters, which is not conducive to the data collection of liquid film flow.

[0003] The above information disclosed in this Background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is already known to a person of ordinary skill in the art. Summary of the invention

[0004] The object of the present invention is to provide a variable inclination plate type falling film absorption process visualization device, which solves the problem that the prior art cannot monitor the flow of liquid film under different parameters such as in an inclined state, at different pressures, temperatures or concentrations.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A variable inclination plate type falling film absorption process visualization device of the present invention comprises:

[0007] A flat-plate falling film absorber is pivotally connected to an angle adjuster to adjust an inclination angle relative to a horizontal plane, the flat-plate falling film absorber comprising:

[0008] The housing is provided with a liquid inlet for introducing liquid, a liquid outlet for discharging liquid and a gas extraction port for introducing steam, and the liquid inlet is provided with a first electric control valve.

[0009] a flat plate, which is arranged in the housing and extends along the gravity direction, the flat plate having a first surface and a second surface opposite to the first surface,

[0010] a liquid distributor, which is arranged on the top of the housing to guide the liquid to spread on the first surface and flow downward in the form of a liquid film,

[0011] The cooling unit comprises a cooling water inlet at the bottom of the flat plate, a cooling water outlet at the top of the flat plate, and a third electrically controlled valve for controlling the flow of cooling water. The cooling water from the cooling water inlet flows along the second surface of the flat plate to the cooling water outlet in a direction countercurrent to the flow of the liquid film.

[0012] a vacuum pump connected to the air extraction port via a second electrically controlled valve,

[0013] a pressure sensor that measures pressure data within the housing,

[0014] a temperature sensor that measures temperature data within the housing,

[0015] a photographing unit directed toward the first surface to generate flow image data of the liquid film,

[0016] A processing unit, one end of which is connected to the pressure sensor and the temperature sensor, and the other end of which is connected to the first electrically controlled valve, the second electrically controlled valve, the third electrically controlled valve, the angle adjuster and the shooting unit, and the processing unit associates the pressure data, the temperature data and the flow image data based on the flow image data.

[0017] In the variable-inclination plate type falling film absorption process visualization device, based on the inclination angle, the control unit sends an angle adjustment instruction to the angle adjuster to adjust the inclination angle; based on the pressure data, the control unit sends a pressure adjustment instruction to the second electric control valve to adjust the pressure; based on the temperature data, the control unit sends a temperature adjustment instruction to the third electric control valve to adjust the cooling water flow.

[0018] In the variable inclination plate type falling film absorption process visualization device, an overflow groove for flowing through the liquid distributor is arranged on the top of the second surface, and the liquid overflowing from the overflow groove is spread on the first surface through the liquid distributor and flows downward in the form of a liquid film.

[0019] In the variable inclination plate type falling film absorption process visualization device, the variable inclination plate type falling film absorption process visualization device also includes a solution generator connected to the overflow tank, which includes:

[0020] a liquid reservoir containing liquid, the liquid reservoir being connected to the liquid inlet via a first electrically controlled valve,

[0021] A flow meter is disposed between the liquid reservoir and the liquid inlet to measure the flow data of the liquid,

[0022] an electric heater, which is disposed in the liquid reservoir to heat the liquid,

[0023] The processing unit sends a flow command to the first electronically controlled valve based on the flow data.

[0024] In the variable inclination plate type falling film absorption process visualization device, the variable inclination plate type falling film absorption process visualization device also includes a solution recovery device connected to the bottom of the outer shell, the solution recovery device is connected to the solution generator to recycle the liquid, and a fourth electric control valve is provided between the solution recovery device and the bottom of the outer shell.

[0025] In the variable-inclination plate type falling film absorption process visualization device, the overflow tank is provided with a concentration sensor for measuring liquid concentration, and the processing unit is electrically connected to the concentration sensor.

[0026] In the variable-inclination plate type falling film absorption process visualization device, the cooling unit is in liquid communication with a constant-temperature water bath unit located outside the shell to circulate cooling water.

[0027] In the variable-inclination plate-type falling film absorption process visualization device, the angle adjuster is connected to the shell via an adjustable support rod, so that the inclination angle of the flat plate falling film absorber is 0-90 degrees.

[0028] In the variable inclination plate type falling film absorption process visualization device, the variable inclination plate type falling film absorption process visualization device also includes a steam generator connected to the exhaust port via a fifth electric control valve, which includes a heating element for heating.

[0029] According to the processing method of the variable inclination plate type falling film absorption process visualization device, the following steps are included:

[0030] The angle adjuster is used to adjust the inclination angle of the flat falling film absorber relative to the horizontal plane.

[0031] The liquid is guided to spread on the first surface and flow downward in the form of a liquid film, the steam is introduced into the shell through the air extraction port, and the cooling water from the cooling water inlet flows along the second surface of the flat plate to the cooling water outlet in the opposite direction of the liquid film flow.

[0032] The photographing unit is directed toward the first surface to generate flow image data of the liquid film,

[0033] After the processing unit adjusts the tilt angle, pressure data and temperature data, the shooting unit continues to generate flow image data of the liquid film.

[0034] In the above technical scheme, the present invention provides a variable inclination plate type falling film absorption process visualization device, which has the following beneficial effects: compared with the prior art, the variable inclination plate type falling film absorption process visualization device has a simple structure and high absorption efficiency, and can capture the instantaneous flow of the absorption medium in the form of a liquid film on the flat plate and the flow characteristics of the liquid film when the absorption angle of the flat plate is changed through imaging technology. By changing the inclination angle of the flat plate, the device can be adjusted in the range of 0-90°. By capturing the characteristics of the instantaneous flow of the absorption medium in the form of a liquid film on the flat plate through imaging, the influence of multiple angles on the liquid film flow is studied. At the same time, the device can change the control parameters, absorption medium concentration, flow rate, cooling water flow, temperature, absorption pressure, absorber inclination angle and structural parameters, flat plate surface structure or roughness and other factor variables, to create a good experimental research foundation for exploring the factors affecting the flow characteristics and revealing the flow characteristics and absorption characteristics mechanism of flat plate falling film absorption. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0036] Figure 1 A schematic diagram of the structure of a device for visualizing a falling film absorption process with a plate having a variable inclination angle provided by an embodiment of the present invention;

[0037] Figure 2 A simplified structural schematic diagram of a device for visualizing a falling film absorption process with a plate having a variable inclination angle provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0044] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0045] See also Figure 1-2 As shown, in one embodiment, a variable inclination plate type falling film absorption process visualization device of the present invention comprises:

[0046] A flat-plate falling film absorber 18 is pivotally connected to an angle adjuster 17 to adjust the tilt angle relative to the horizontal plane. The flat-plate falling film absorber 18 comprises:

[0047] The housing is provided with a liquid inlet 5 for introducing liquid, a liquid outlet for leading out liquid and a gas extraction port for introducing steam. The liquid inlet 5 is provided with a first electric control valve 3.

[0048] a flat plate 13, which is disposed in the housing and extends in the direction of gravity, wherein the flat plate 13 has a first surface and a second surface opposite to the first surface,

[0049] a liquid distributor 7, which is arranged on the top of the housing to guide the liquid to spread on the first surface and flow downward in the form of a liquid film,

[0050] The cooling unit includes a cooling water inlet 19 disposed at the bottom of the flat plate 13, a cooling water outlet 8 disposed at the top of the flat plate 13, and a third electrically controlled valve for controlling the flow of cooling water. The cooling water from the cooling water inlet 19 flows along the second surface of the flat plate 13 to the cooling water outlet 8 in a direction countercurrent to the flow of the liquid film.

[0051] A vacuum pump 14 is connected to the air extraction port via a second electrically controlled valve 12.

[0052] A pressure sensor 9, which measures the pressure data inside the housing,

[0053] a temperature sensor 10, which measures temperature data within the housing,

[0054] a photographing unit 23, which faces the first surface to generate flow image data of the liquid film,

[0055] A processing unit, one end of which is connected to the pressure sensor 9 and the temperature sensor 10, and the other end of which is connected to the first electrically controlled valve 3, the second electrically controlled valve 12, the third electrically controlled valve, the angle adjuster 17 and the shooting unit 23, and the processing unit associates the pressure data, temperature data and flow image data based on the flow image data.

[0056] The flat plate 13 absorber of the variable-angle plate-type falling film absorption process visualization device can change the absorption angle as a whole, and can also combine image processing technology to capture the instantaneous flow of the absorption medium in the form of a liquid film on the flat plate 13, presenting the three-dimensional liquid film flow state when the flat plate falling film flows. By changing the inclination angle of the flat plate 13 through the adjustable support rod, the flat plate falling film absorber 18 can be adjusted in the range of 0-90°, and can accurately measure parameters such as temperature, absorption pressure and flow, as well as display the transient flow state of the liquid film, creating a good experimental research foundation for researchers to study local flow behaviors such as film flow, stream flow and droplet flow, and reveal the flow characteristics and absorption characteristics mechanism of flat plate falling film absorption.

[0057] In a preferred embodiment of the variable-inclination plate type falling film absorption process visualization device, based on the inclination angle, the control unit sends an angle adjustment instruction to the angle adjuster 17 to adjust the inclination angle; based on the pressure data, the control unit sends a pressure adjustment instruction to the second electrically controlled valve 12 to adjust the pressure; based on the temperature data, the control unit sends a temperature adjustment instruction to the third electrically controlled valve to adjust the cooling water flow.

[0058] In a preferred embodiment of the variable inclination plate type falling film absorption process visualization device, an overflow groove 6 for flowing through the liquid distributor 7 is provided on the top of the second surface, and the liquid overflowing from the overflow groove 6 is spread on the first surface through the liquid distributor 7 and flows downward in the form of a liquid film.

[0059] In a preferred embodiment of the variable inclination plate type falling film absorption process visualization device, the variable inclination plate type falling film absorption process visualization device further includes a solution generator 1 connected to the overflow tank 6, which includes:

[0060] A liquid reservoir containing liquid, wherein the liquid reservoir is connected to the liquid inlet 5 via a first electrically controlled valve 3,

[0061] A flow meter 4 is provided between the liquid reservoir and the liquid inlet 5 to measure the flow data of the liquid,

[0062] an electric heater 2, which is arranged in the liquid reservoir to heat the liquid,

[0063] The processing unit sends a flow command to the first electronically controlled valve 3 based on the flow data.

[0064] In a preferred embodiment of the variable inclination plate type falling film absorption process visualization device, the variable inclination plate type falling film absorption process visualization device also includes a solution recovery device 22 connected to the bottom of the outer shell, the solution recovery device 22 is connected to the solution generator 1 to recycle the liquid, and a fourth electric control valve 21 is provided between the solution recovery device 22 and the bottom of the outer shell.

[0065] In a preferred embodiment of the variable-inclination plate type falling film absorption process visualization device, the overflow tank 6 is provided with a concentration sensor for measuring liquid concentration, and the processing unit is electrically connected to the concentration sensor.

[0066] In a preferred embodiment of the variable-inclination-angle plate-type falling film absorption process visualization device, the cooling unit is in liquid communication with a constant-temperature water bath unit located outside the housing to circulate cooling water.

[0067] In a preferred embodiment of the variable-inclination plate-type falling film absorption process visualization device, the angle adjuster 17 is connected to the housing via an adjustable support rod, so that the inclination angle of the flat plate falling film absorber 18 is 0-90 degrees.

[0068] In a preferred embodiment of the variable inclination plate type falling film absorption process visualization device, the variable inclination plate type falling film absorption process visualization device also includes a steam generator 15 connected to the exhaust port via a fifth electrically controlled valve 11, which includes a heating element 16 for heating.

[0069] In one embodiment, the structure of the variable inclination plate falling film absorption process visualization device will be composed of a flat falling film absorber 18, a solution storage device 1, a vacuum pump 14, a solution recovery device 22, a steam generator, a cooling water system and a data acquisition system. The flat falling film absorber 18 is the core component of the device. The liquid freely flows downward along the inclined or vertical surface under the action of gravity to form a falling film flow. The gas can be absorbed by the absorption liquid to form a flowing liquid film, thereby achieving the effect of heat transfer and mass transfer. Among them, the rectangular shell material of the flat-plate falling film absorber 18 is organic glass, the internal flat plate 13 is stainless steel, the front of the flat plate 13 wall is a water vapor zone, the back of the flat plate 13 wall is a water cooling zone, a solution overflow tank 6 is arranged on the top of the back of the flat plate 13 wall, and solution and cooling water inlets and outlets and an exhaust port are arranged on both sides of the absorber respectively; the shell of the solution storage device is made of glass material, and a temperature-controllable electric heater 2 is built in; the solution recovery device 22 is similar in volume to the solution storage device, and the shell is also made of glass material; the shell of the steam generator 15 is made of glass material, and a temperature-controllable electric heater 2 is built in; the constant temperature water bath unit is composed of a constant temperature water bath unit 25 and a water pump 24; the data acquisition system is mainly composed of a pressure sensor 9, a thermocouple, a flow meter 4, a high-speed camera 23, etc.; the vacuum pump 14 is connected to the exhaust port on the flat-plate falling film absorber 18.

[0070] In one embodiment, the solution generator 1 includes a concentrated solution storage tank, in which the lithium bromide solution is adjusted to the required concentration. The solution is stored in the reservoir. Open the valve, and the solution flows out of the reservoir to the overflow tank 6. The function of the overflow tank 6 is to allow the solution to slowly enter the flat plate 13 and be evenly distributed. After the overflow tank 6 is full, the overflowed liquid passes through the liquid distributor 7 and is spread on the flat plate 13, and flows downward in the form of a liquid film. During the flow process, the liquid film evenly spread on the flat plate 13 transfers heat and mass with the water vapor inside the flat plate 13 absorber. The liquid film formed by the solution flows to the bottom of the flat plate 13 absorber, opens the valve, and then allows the solution to return to the solution recovery device 22. The solution flow control system mainly includes the flow process and the heat and mass transfer process. The flow process is divided into vertical downward flow or inclined downward flow, and the flow angle can be controlled by the angle regulator 17.

[0071] In one embodiment, the temperature of the steam in the steam generator 15 is controlled by a PID controller, so that the steam generator generates water vapor under low pressure. After the water vapor is generated, the valve 11 is opened to allow the water vapor to enter and fill the flat plate 13 absorber. The water vapor performs a heat and mass transfer process with the experimental solution in the flat plate 13 absorber.

[0072] In one embodiment, the cooling unit is turned on, and cooling water of a certain temperature is input to the bottom side of the plate 13 through the cooling water inlet 19, and flows out from the cooling water outlet 8 in a countercurrent form with the solution in the plate 13. In this process, the cooling water recovers the solution and the heat of solution generated by the water vapor during the absorption process. In one embodiment, a one-way valve 20 is provided in the pipeline between the solution recovery device 22 and the shell.

[0073] In one embodiment, the vacuum pump 14 is turned on to evacuate the air, and it is ensured that after the evacuation is completed, the pressure of the inclined plate absorber after stabilization is the saturated vapor pressure corresponding to the solution and temperature. The angle adjuster 17 adjusts the angle from 0 to 90 degrees, and is used to study the influence of different angles on the flow state of the liquid film.

[0074] In one embodiment, the photographing unit 23 is a high-speed camera, which takes pictures of the solution flow process moment by moment, and further studies the flow state of the liquid film through the images.

[0075] This variable-inclination plate falling film absorption process visualization device observes the flow process of liquid on the flat plate through organic glass material, realizing the visualization of the flow process; through the angle adjuster, the inclination angle of the inclined plate is changed hourly during the flow of the solution on the inclined plate, realizing variable angle adjustment with variable inclination angle; the 3D transient flow state of the liquid film on the flat plate at different inclination angles is captured by a high-speed camera, presenting the 3D complex flow microscopic state image of the liquid film.

[0076] According to the processing method of the variable inclination plate type falling film absorption process visualization device, the following steps are included:

[0077] The inclination angle of the flat falling film absorber 18 relative to the horizontal plane is adjusted by the angle adjuster 17.

[0078] The liquid is guided to spread on the first surface and flow downward in the form of a liquid film, the steam is introduced into the shell through the air extraction port, and the cooling water from the cooling water inlet 19 flows along the second surface of the flat plate 13 to the cooling water outlet 8 in the countercurrent direction of the liquid film flow,

[0079] The photographing unit 23 faces the first surface to generate flow image data of the liquid film.

[0080] After the processing unit adjusts the tilt angle, pressure data and temperature data, the photographing unit 23 continues to generate flow image data of the liquid film.

[0081] This method can change the absorption angle as a whole, and achieve an adjustable range of 0-90°. At the same time, it can combine image processing technology to present the three-dimensional liquid film flow state during flat falling film flow. It solves the problem of complex structure and large size of traditional horizontal tube falling film. At the same time, the device can accurately measure parameters such as temperature, absorption pressure and flow rate, so that the device can be used to study local flow behaviors such as film flow, stream flow and droplet flow, and help researchers to reveal the absorption flow and absorption mechanism of flat falling film.

[0082] Finally, it should be noted that the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making any creative work are within the scope of protection of the present application.

[0083] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A variable inclination plate type falling film absorption process visualization device, characterized in that: It includes: A flat-plate falling film absorber is pivotally connected to an angle adjuster to adjust an inclination angle relative to a horizontal plane, the flat-plate falling film absorber comprising: The housing is provided with a liquid inlet for introducing liquid, a liquid outlet for discharging liquid, and a gas extraction port for introducing steam. a flat plate, which is arranged in the housing and extends along the gravity direction, the flat plate having a first surface and a second surface opposite to the first surface, a liquid distributor, which is arranged on the top of the housing to guide the liquid to spread on the first surface and flow downward in the form of a liquid film, The cooling unit comprises a cooling water inlet at the bottom of the flat plate, a cooling water outlet at the top of the flat plate, and a third electrically controlled valve for controlling the flow of cooling water. The cooling water from the cooling water inlet flows along the second surface of the flat plate to the cooling water outlet in a direction countercurrent to the flow of the liquid film. a vacuum pump connected to the air extraction port via a second electrically controlled valve, a pressure sensor that measures pressure data within the housing, a temperature sensor that measures temperature data within the housing, a photographing unit directed toward the first surface to generate flow image data of the liquid film, a processing unit, one end of which is connected to the pressure sensor and the temperature sensor, and the other end of which is connected to the first electrically controlled valve, the second electrically controlled valve, the third electrically controlled valve, the angle adjuster and the shooting unit, wherein the processing unit associates the pressure data, the temperature data and the flow image data based on the flow image data; Wherein, based on the tilt angle, the control unit sends an angle adjustment instruction to the angle adjuster to adjust the tilt angle, based on the pressure data, the control unit sends a pressure adjustment instruction to the second electronically controlled valve to adjust the pressure, and based on the temperature data, the control unit sends a temperature adjustment instruction to the third electronically controlled valve to adjust the cooling water flow; Wherein, the cooling unit is in liquid communication with a constant temperature water bath unit located outside the housing to circulate cooling water, and the constant temperature water bath unit has a built-in water pump; Wherein, the angle adjuster is connected to the housing via an adjustable support rod, so that the inclination angle of the flat-plate falling film absorber is 0-90 degrees.

2. The variable inclination plate falling film absorption process visualization device according to claim 1 is characterized in that: An overflow groove for flowing through the liquid distributor is arranged on the top of the second surface, and the liquid overflowing from the overflow groove is spread on the first surface through the liquid distributor and flows downward in the form of a liquid film.

3. The variable inclination plate falling film absorption process visualization device according to claim 2, characterized in that: The variable inclination plate type falling film absorption process visualization device also includes a solution generator connected to the overflow tank, which includes: a liquid reservoir containing liquid, the liquid reservoir being connected to the liquid inlet via a first electrically controlled valve, A flow meter is disposed between the liquid reservoir and the liquid inlet to measure the flow data of the liquid, an electric heater, which is disposed in the liquid reservoir to heat the liquid, The processing unit sends a flow command to the first electronically controlled valve based on the flow data.

4. The variable inclination plate falling film absorption process visualization device according to claim 3 is characterized in that: The variable inclination plate falling film absorption process visualization device also includes a solution recovery device connected to the bottom of the shell, the solution recovery device is connected to the solution generator to recycle the liquid, and a fourth electric control valve is provided between the solution recovery device and the bottom of the shell.

5. The variable inclination plate falling film absorption process visualization device according to claim 2, characterized in that: The overflow tank is provided with a concentration sensor for measuring liquid concentration, and the processing unit is electrically connected to the concentration sensor.

6. The variable inclination plate falling film absorption process visualization device according to claim 1, characterized in that: The variable inclination plate type falling film absorption process visualization device further comprises a steam generator connected to the gas extraction port via a fifth electrically controlled valve, and the steam generator comprises a heating element for heating.

7. A processing method for a variable inclination plate type falling film absorption process visualization device according to any one of claims 1 to 6, comprising the following steps: The angle adjuster is used to adjust the inclination angle of the flat falling film absorber relative to the horizontal plane. The liquid is guided to spread on the first surface and flow downward in the form of a liquid film, the steam is introduced into the shell through the air extraction port, and the cooling water from the cooling water inlet flows along the second surface of the flat plate to the cooling water outlet in the opposite direction of the liquid film flow. The photographing unit is directed toward the first surface to generate flow image data of the liquid film, After the processing unit adjusts the tilt angle, pressure data and temperature data, the shooting unit continues to generate flow image data of the liquid film.

Images