An absorption and desorption experimental device

Abstract

The present invention provides an absorption and desorption experimental device, which solves the problem of uneven thickness of the fluid absorption film on the wall of the absorption column in the existing absorption experiment. Through the scraping film absorption tower of the present invention, when in use, the scraping film blade is driven by a motor to rotate at high speed, and the absorbent overflowing into the glass column through the liquid inlet is brought to the inner wall around the glass column by the high-speed rotating scraping film blade. At the same time, the high-speed rotating scraping film blade continuously scrapes off the local thicker fluid of the absorption film, so that the absorbent is forced to form a uniform film; and, by replacing scraping film blades of different lengths and then adjusting the gap between the scraping film blade and the inner wall of the glass column, the purpose of adjustable film thickness can be achieved to meet the absorption and desorption experimental requirements of gases with different components; most of the components of the scraping film absorption tower of the device of the present invention are detachably connected, and installation, maintenance, and replacement of components are relatively convenient. The columnar structure of the scraping film absorption tower also makes the processing difficulty relatively low.

Description

Technical Field

[0001] The invention relates to the technical field of gas absorption experiments, in particular to an absorption and desorption experimental device. Background Art

[0002] 1. Absorption kinetics determination The existing absorption tower is a falling film absorption column. The film thickness of this structure cannot be determined, and the speed of flowing down the wall is a fuzzy estimate, namely Q / A, where Q is the flow rate and A is the cross-sectional area. Since the surface roughness of the absorption column is uncertain, the tension formed will be uneven, so there will be a local thickening phenomenon. The uneven surface affects the mass transfer driving force and the absorption contact area, and errors will occur when calculating the absorption solubility. In addition, the installation of the falling film absorption column is more troublesome. In order to ensure that there is fluid along the wall, verticality is often required for installation, and the distributor and the absorption column are required to be completely vertical. It is still difficult to ensure uniform distribution and flow down along the wall. For solvents with high viscosity and tension, surging flow will occur, and uniform distribution cannot be achieved.

[0003] 2. The existing absorption devices have relatively simple functions and can only complete a single absorption experiment. There are also experimental devices that combine absorption and desorption, but the equipment has a high vacancy rate, occupies a large area, and has poor use effect. Summary of the invention

[0004] In order to solve the problem of uneven thickness of the fluid absorption film on the wall of the absorption column in the existing absorption experiment in the background technology, the present invention proposes an absorption and desorption experimental device.

[0005] The technical solution of the present invention is: an absorption and desorption experimental device, including a scraping film absorption tower; the scraping film absorption tower includes a hollow glass tower column, the top of the glass tower column is provided with a detachable upper tower head, the upper tower head is a buckle cover structure, the upper tower head is provided with a liquid inlet pipe head and an exhaust port connected to the glass tower column, the upper part of the upper tower head is provided with a motor support, the motor support is vertically provided with a motor, the output shaft of the motor is connected to the upper end of the shaft rod by a coupling, the lower end of the shaft rod passes through the top of the upper tower head and extends to the lower part of the glass tower column, the shaft rod is detachably provided with scraping film blades staggered up and down, there is a gap between the scraping film blades and the inner wall of the glass tower column, the bottom of the glass tower column is provided with a detachable lower tower head, the lower tower head is a hollow structure, the lower tower head is provided with an air inlet connected to the glass tower column, and the bottom of the lower tower head is provided with a liquid outlet; a constant temperature heating component is provided on the outer wall of the glass tower column.

[0006] The constant temperature heating component includes a glass sleeve, which is sleeved on the outside of the glass tower column. The inner diameter of the glass sleeve is larger than the outer diameter of the glass tower column. The upper end face and the lower end face of the glass sleeve are sealed and connected to the outer wall of the glass tower column. A heating oil channel is formed between the inner wall of the glass sleeve and the outer wall of the glass tower column. The lower part of the glass sleeve is provided with an oil inlet connected to the heating oil channel, and the upper part of the glass sleeve is provided with an oil outlet connected to the heating oil channel.

[0007] A liquid dispersion cap is arranged on the upper part of the shaft rod. The liquid dispersion cap is a frustum or cone structure. The inner end of the liquid inlet pipe head extends above the inclined surface of the liquid dispersion cap.

[0008] A plurality of rows of glass guide bodies are arranged on the upper part of the inner wall of the glass tower column. The glass guide bodies are of a diamond structure, and the glass guide bodies in the upper row are arranged alternately with the glass guide bodies in the lower row.

[0009] The liquid inlet pipe head of the scraper film absorption tower is connected to the bottom liquid outlet of the raw material tank through an inlet pipe, and a peristaltic pump and a first ball valve are provided on the inlet pipe, and the first ball valve is the main liquid inlet switch; the liquid outlet of the scraper film absorption tower is connected to the discharge pipe, and the end of the discharge pipe is connected to the product tank, and a fourth ball valve is provided at the connection between the product tank and the discharge pipe, and an overflow outlet is provided in the middle of the discharge pipe, and a second ball valve is provided at the connection between the overflow outlet and the discharge pipe.

[0010] The end of the discharge pipe is connected to a tee, one end of the tee is connected to the product tank, and the fourth ball valve is arranged at the connection between the tee and the product tank; the other end of the tee is connected to the feed tank of the lower device, and the third ball valve is arranged at the other end of the tee.

[0011] The air inlet of the scraping film absorption tower is connected to the end of the air intake main pipe, and the end of the air intake main pipe is connected to the first gas detector through a gas measuring branch pipe. A third solenoid valve is provided on the gas measuring branch pipe. An air intake buffer tank for buffering and pressure stabilization is provided in the middle of the air intake main pipe. A plurality of air intake measuring tubes are connected in parallel to the end of the air intake main pipe, and the number of the air intake measuring tubes is the same as the number of air intake components; each air intake measuring tube is provided with a filter, a ball valve, a pressure reducing valve, a flow metering element and a one-way valve in sequence from the inlet to the outlet, and a pressure measuring element is provided on the air intake measuring tube at the pressure reducing valve.

[0012] The exhaust port of the scraped film absorption tower is connected to the exhaust pipe. The exhaust pipe is provided with a second solenoid valve, a condenser, a gas-liquid separator, and a second gas detector in sequence from the inlet to the outlet. A fourth ball valve is provided at the connection between the second gas detector and the exhaust pipe.

[0013] An exhaust pipe is connected to the exhaust pipeline between the second solenoid valve and the exhaust port, and a first solenoid valve is arranged on the exhaust pipe.

[0014] The end of the exhaust pipe is connected to a vacuum buffer tank, and a seventh ball valve is provided at the end of the exhaust pipe. The exhaust gas in the vacuum buffer tank is used for a later desorption experiment; the vacuum buffer tank is connected to the vacuum pump through a vacuum exhaust pipe, and a stop valve is provided on the vacuum exhaust pipe; a pressure relief branch pipe is provided near the vacuum buffer tank, and an eighth ball valve is provided on the pressure relief branch pipe.

[0015] Advantages of the present invention: When the scraping film absorption tower of the present invention is used, the scraping film blade is driven by a motor to rotate at a high speed, and the absorbent overflowing into the glass tower column through the liquid inlet is brought to the inner walls around the glass tower column by the high-speed rotating scraping film blade. At the same time, the high-speed rotating scraping film blade continuously scrapes off the locally thicker fluid of the absorption film, so that the absorbent is forced to form a uniform film, so that the mass transfer driving force is relatively uniform, the absorption contact area is smooth, and the calculation error of the absorption solubility is reduced; moreover, by replacing the scraping film blades of different lengths and then adjusting the gap between the scraping film blade and the inner wall of the glass tower column, the purpose of adjustable film thickness can be achieved to meet the absorption and desorption experimental requirements of gases with different components; most of the components of the scraping film absorption tower of the device of the present invention adopt detachable connections, which is convenient for installation, maintenance and replacement of components. The columnar structure of the scraping film absorption tower also makes the processing difficulty relatively low.

[0016] Furthermore, the first gas detector installed before the air intake is matched with the second gas detector installed on the exhaust pipe and after the gas-liquid separator, and the data before and after are compared to complete the gas desorption experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 is a system diagram of the present invention;

[0019] Figure 2 for Figure 1 The structural diagram of the scraped film absorption tower in FIG.

[0020] Figure 3 for Figure 2 The structural diagram of the glass tower column in FIG.

[0021] In the figure, 1, glass tower column, 2, upper tower head, 3, motor, 4, shaft, 5, film scraping blade, 6, liquid inlet pipe head, 7, liquid dispersion cap, 8, glass flow guide, 9, glass sleeve, 10, oil inlet, 11, oil outlet, 12, lower tower head, 13, liquid outlet, 14, air inlet, 15, exhaust port;

[0022] YL01: raw material tank, YL02: overflow outlet;

[0023] P01: peristaltic pump, P02: vacuum pump;

[0024] GM01: scraped film absorption tower;

[0025] JC01: first gas detector, JC02: second gas detector;

[0026] CP01: Product tank;

[0027] LN01: condenser;

[0028] FL01: Gas-liquid separator;

[0029] QH01: suction buffer tank;

[0030] HV01: first one-way valve, HV02: second one-way valve;

[0031] FI01: first flow metering element, FI02: second flow metering element;

[0032] YV01: the first pressure reducing valve, YV02: the second pressure reducing valve;

[0033] PI01: first pressure measuring element, PI02: second pressure measuring element, PI03: third pressure measuring element;

[0034] F1: first filter, F2: second filter;

[0035] ZK01: Vacuum buffer tank;

[0036] ZV01: stop valve;

[0037] DV01: first solenoid valve, DV02: second solenoid valve, DV03: third solenoid valve, DV04: fourth solenoid valve;

[0038] QV01: the first ball valve, QV02: the second ball valve, QV03: the third ball valve, QV04: the fourth ball valve, QV05: the fifth ball valve, QV06: the sixth ball valve, QV07: the seventh ball valve, QV08: the eighth ball valve. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0040] Example 1: An absorption and desorption experimental device, such as Figure 1 and Figure 2 As shown, the scraping absorption tower GM01 includes a hollow glass tower column 1, the top of the glass tower column 1 is provided with a detachable upper tower head 2, the upper tower head 2 is a buckle cover structure, the upper tower head 2 is provided with a liquid inlet pipe head 6 and an exhaust port 15 connected to the glass tower column 1, the upper part of the upper tower head 2 is provided with a motor support, the motor support is vertically provided with a motor 3, and the output shaft of the motor 3 is connected to the upper end of the shaft 4 through a coupling, as shown in FIG. Figure 2 As shown, a liquid dispersion cap 7 is provided on the upper part of the shaft 4. The liquid dispersion cap 7 is a frustum or cone structure, and the inner end of the liquid inlet pipe head 6 extends to the upper part of the inclined surface of the liquid dispersion cap 7. Three rows of glass guide bodies 8 are provided on the upper part of the inner wall of the glass column 1. The glass guide bodies are a diamond structure, and the glass guide bodies 8 in the upper row are arranged alternately with the glass guide bodies 8 in the lower row. The liquid dispersion cap 7 and the glass guide bodies 8 cooperate so that the inflowing absorbent is diffused to the inner wall of the glass column 1 under the action of the liquid dispersion cap 7, and then the glass guide body 8 guides the adsorbent on the inner wall of the glass column 1 to make it flow down evenly. The lower end of the shaft 4 passes through the top of the upper tower head 2 and extends to the lower part of the glass tower column 1. The shaft 4 is detachably provided with scraping blades 5 staggered up and down. There is a gap between the scraping blades 5 and the inner wall of the glass tower column 1. The bottom of the glass tower column 1 is provided with a detachable lower tower head 12. The lower tower head 12 is a hollow structure. The lower tower head 12 is provided with an air inlet 14 connected to the glass tower column 1. The bottom of the lower tower head 12 is provided with a liquid outlet 13; the outer wall of the glass tower column 1 is provided with a constant temperature heating component. Figure 2 and Figure 3 As shown, the constant temperature heating component includes a glass sleeve 9, which is sleeved on the outside of the glass tower column 1. The inner diameter of the glass sleeve 9 is larger than the outer diameter of the glass tower column 1. The upper end surface and the lower end surface of the glass sleeve 9 are sealed and connected to the outer wall of the glass tower column 1. A heating oil channel is formed between the inner wall of the glass sleeve 9 and the outer wall of the glass tower column 1. The lower part of the glass sleeve 9 is provided with an oil inlet 10 connected to the heating oil channel, and the upper part of the glass sleeve 9 is provided with an oil outlet 11 connected to the heating oil channel.

[0041] like Figure 1As shown, the liquid inlet pipe head 6 of the scraping film absorption tower GM01 is connected to the bottom liquid outlet of the raw material tank YL01 through the liquid inlet pipeline, and the liquid inlet pipeline is provided with a peristaltic pump P01 and a first ball valve QV01, and the first ball valve QV01 is the main liquid inlet switch; the liquid outlet of the scraping film absorption tower GM01 is connected to the drainage pipeline, and the middle of the drainage pipeline is provided with an overflow outlet YL02, and the connection between the overflow outlet YL02 and the drainage pipeline is provided with a second ball valve QV02. The end of the drainage pipeline is connected to a three-way pipe, one end of the three-way pipe is connected to the product tank CP01, and the fourth ball valve QV04 is provided at the connection between the three-way pipe and the product tank CP01; the other end of the three-way pipe is connected to the feed tank of the lower device, and the other end of the three-way pipe is provided with a third ball valve QV03.

[0042] The air inlet 14 of the scraped film absorption tower GM01 is connected to the end of the air intake main pipe, and the end of the air intake main pipe is connected to the first gas detector JC01 through a gas measuring branch pipe. A third solenoid valve DV03 is provided on the gas measuring branch pipe. An air intake buffer tank QH01 for buffering and pressure stabilization is provided in the middle of the air intake main pipe. A plurality of air intake measuring tubes are connected in parallel to the end of the air intake main pipe, and the number of the air intake measuring tubes is the same as the number of air intake components. In this embodiment, two air intake measuring tubes are used as an example: air intake measuring tube I and air intake measuring tube II, such as Figure 1 As shown, the intake measuring tube I is provided with a first filter F1, a fifth ball valve QV05, a first pressure reducing valve YV01, a first flow metering element FI01 and a first non-return valve HV01 in sequence from the inlet to the outlet, wherein the intake measuring tube I at the first pressure reducing valve YV01 is provided with a first pressure measuring element PI01, and the intake measuring tube II is provided with a second filter FI02, a sixth ball valve QV06, a second pressure reducing valve YV02, a second flow metering element FI02 and a second non-return valve HV02 in sequence from the inlet to the outlet, wherein the intake measuring tube II at the second pressure reducing valve YV01 is provided with a second pressure measuring element PI02,

[0043] The exhaust port 15 of the scraped film absorption tower GM01 is connected to the exhaust pipe. The second solenoid valve DV02, condenser LN01, gas-liquid separator FL01, and second gas detector JC02 are arranged in sequence on the exhaust pipe from the inlet to the outlet. The fourth ball valve QV04 is arranged at the connection between the second gas detector JC02 and the exhaust pipe. A venting branch pipe is connected to the exhaust pipe between the second solenoid valve DV02 and the exhaust port 15, and the first solenoid valve DV01 is arranged on the venting branch pipe. The condenser LN01 and the gas-liquid separator FL01 cooperate to separate the gaseous adsorbent discharged with the tail gas.

[0044] The end of the exhaust pipe is connected to a vacuum buffer tank ZK01, and a seventh ball valve QV07 is provided at the end of the exhaust pipe. The exhaust gas in the vacuum buffer tank ZK01 is used for the later desorption experiment; the vacuum buffer tank ZK01 is connected to the vacuum pump P02 through a vacuum exhaust pipe, and a stop valve ZV01 is provided on the vacuum exhaust pipe; a pressure relief branch pipe is provided near the vacuum buffer tank ZK01, and an eighth ball valve QV08 is provided on the pressure relief branch pipe.

[0045] Working principle: When in use, first connect the oil inlet and outlet of the scraper absorption tower to the heating oil circulation system. After adjusting the temperature of the heating oil, start the heating oil circulation to preheat the scraper absorption tower. After preheating for a period of time, turn on the peristaltic pump and the motor, and the absorbent in the raw material tank is pumped into the scraper absorption tower by the peristaltic pump. Under the action of the high-speed rotating scraper blade, liquid dispersion cap, and diamond-shaped glass flow guide, a uniform film is formed; through the monitoring of the components on the intake measuring tube I and the intake measuring tube II, the measured gas with the required component content is input into the intake main pipe, and first enters the suction buffer tank (which mainly plays a buffering and voltage stabilizing role), and the component content at this time is detected by the first gas detector, and then passes through the glass tower column from bottom to top. Part of the components in the measured gas are absorbed by the absorption membrane, and the remaining exhaust gas is discharged into the exhaust channel. The second gas detector detects the content of each component in the exhaust gas, and the exhaust gas finally enters the vacuum buffer tank for compression, separation, and purification (the liquefaction pressure of each gas component is different) to prepare for the next level experiment.

[0046] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is limited by the appended claims rather than the above description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. An absorption and desorption experimental device, characterized in that: The scraping absorption tower (GM01) comprises a hollow glass tower column (1), the top of the glass tower column (1) is provided with a detachable upper tower head (2), the upper tower head (2) is a buckle cover structure, the upper tower head (2) is provided with a liquid inlet pipe head (6) and an exhaust port (15) connected to the glass tower column (1), the upper part of the upper tower head (2) is provided with a motor support, a motor (3) is vertically provided on the motor support, the output shaft of the motor (3) is connected to the upper end of the shaft rod (4) through a coupling, and the lower end of the shaft rod (4) passes through the upper The top of the tower head (2) extends to the lower part of the glass tower column (1), and the shaft rod (4) is detachably provided with scraping blades (5) staggered up and down, and there is a gap between the scraping blades (5) and the inner wall of the glass tower column (1). The bottom of the glass tower column (1) is provided with a detachable lower tower head (12), and the lower tower head (12) is a hollow structure. The lower tower head (12) is provided with an air inlet (14) connected to the glass tower column (1), and the bottom of the lower tower head (12) is provided with a liquid outlet (13); a constant temperature heating component is provided on the outer wall of the glass tower column (1); The liquid inlet pipe head (6) of the scraping film absorption tower (GM01) is connected to the bottom liquid outlet of the raw material tank (YL01) through the liquid inlet pipeline, and a peristaltic pump (P01) and a first ball valve (QV01) are provided on the liquid inlet pipeline, and the first ball valve (QV01) is the main liquid inlet switch; the liquid outlet of the scraping film absorption tower (GM01) is connected to the drainage pipeline, the end of the drainage pipeline is connected to the product tank (CP01), a fourth ball valve (QV04) is provided at the connection between the product tank (CP01) and the drainage pipeline, an overflow outlet (YL02) is provided in the middle of the drainage pipeline, and a second ball valve (QV02) is provided at the connection between the overflow outlet (YL02) and the drainage pipeline; A tee is connected to the end of the discharge pipe, one end of the tee is connected to the product tank (CP01), and a fourth ball valve (QV04) is arranged at the connection between the tee and the product tank (CP01); the other end of the tee is connected to the feed tank of the lower device, and a third ball valve (QV03) is arranged at the other end of the tee; The air inlet (14) of the scraping film absorption tower (GM01) is connected to the end of the air intake main pipe, and the end of the air intake main pipe is connected to the first gas detector (JC01) through a gas measuring branch pipe. A third solenoid valve (DV03) is provided on the gas measuring branch pipe. An air suction buffer tank (QH01) for buffering and pressure stabilization is provided in the middle of the air intake main pipe. A plurality of air intake measuring pipes are connected in parallel to the end of the air intake main pipe, and the number of the air intake measuring pipes is the same as the number of air intake components. Each air intake measuring pipe is provided with a filter, a ball valve, a pressure reducing valve, a flow metering element and a one-way valve in sequence from the inlet to the outlet, wherein a pressure measuring element is provided on the air intake measuring pipe at the pressure reducing valve. The exhaust port (15) of the scraped film absorption tower (GM01) is connected to the exhaust pipe, and the exhaust pipe is provided with a second solenoid valve (DV02), a condenser (LN01), a gas-liquid separator (FL01), and a second gas detector (JC02) in sequence from the inlet to the outlet, and a fourth ball valve (QV04) is provided at the connection between the second gas detector (JC02) and the exhaust pipe; the condenser (LN01) and the gas-liquid separator (FL01) cooperate to separate the gaseous adsorbent discharged with the tail gas; An exhaust pipe is connected to the exhaust pipe between the second solenoid valve (DV02) and the exhaust port (15), and a first solenoid valve (DV01) is provided on the exhaust pipe; A vacuum buffer tank (ZK01) is connected to the end of the exhaust pipe, and a seventh ball valve (QV07) is provided at the end of the exhaust pipe. The exhaust gas in the vacuum buffer tank (ZK01) is used for a later desorption experiment; the vacuum buffer tank (ZK01) is connected to the vacuum pump (P02) through a vacuum exhaust pipe, and a stop valve (ZV01) is provided on the vacuum exhaust pipe; a pressure relief branch pipe is provided near the vacuum buffer tank (ZK01), and an eighth ball valve (QV08) is provided on the pressure relief branch pipe.

2. An absorption and desorption experimental device as claimed in claim 1, characterized in that: The constant temperature heating component comprises a glass sleeve (9), the glass sleeve (9) is sleeved on the outside of the glass column (1), the inner diameter of the glass sleeve (9) is larger than the outer diameter of the glass column (1), the upper end surface and the lower end surface of the glass sleeve (9) are both sealedly connected to the outer wall of the glass column (1), a heating oil channel is formed between the inner wall of the glass sleeve (9) and the outer wall of the glass column (1), the lower part of the glass sleeve (9) is provided with an oil inlet (10) communicating with the heating oil channel, and the upper part of the glass sleeve (9) is provided with an oil outlet (11) communicating with the heating oil channel.

3. An absorption and desorption experimental device as claimed in claim 1, characterized in that: A liquid dispersion cap (7) is arranged on the upper part of the shaft (4). The liquid dispersion cap (7) is a frustum or cone structure. The inner end of the liquid inlet pipe head (6) extends to above the inclined surface of the liquid dispersion cap (7).

4. An absorption and desorption experimental device as claimed in claim 3, characterized in that: A plurality of rows of glass guide bodies (8) are arranged on the upper part of the inner wall of the glass tower column (1). The glass guide bodies are of a diamond structure, and the glass guide bodies (8) in the upper row are arranged alternately with the glass guide bodies (8) in the lower row.

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