Small adsorption tower experimental equipment and use method thereof

Abstract

The invention discloses small adsorption tower experimental equipment and a use method thereof, and belongs to the technical field of pressure swing adsorption. The problems that in the prior art, equipment parameters cannot be rapidly adjusted, and the optimal adsorbent cannot be screened are solved. The technical key points are as follows: proportioned gas enters a mixing tank through a pipeline, a booster pump and a flow controller are started, the gas enters an adsorption tower and then enters a gas analyzer for real-time gas detection, and after adsorption is completed, a vacuum pump is started to perform vacuum desorption on an adsorbent in the adsorption tower. The performance of the adsorbent can be verified through experiments, the pressure swing adsorption process is tested and explored by testing the performance of the adsorbent, the optimal actual process requirement of a pressure swing adsorption tower and the optimal performance of the adsorbent in use are met, and the adsorbent has wide market prospects.

Description

Technical Field

[0001] The invention relates to the technical field of pressure swing adsorption, in particular to a small adsorption tower experimental device and a use method thereof. Background Art

[0002] In the chemical industry, adsorption is an important separation technology that separates other components from gases or liquids through solid adsorbents. In small-scale experiments, by adjusting parameters such as pressure and flow in the adsorption tower, the adsorption properties of the adsorbent during the adsorption process, such as adsorption rate and adsorption amount, can be studied. This is of great significance for optimizing the adsorption process and improving the adsorption efficiency.

[0003] The development of pressure swing adsorption process technology includes intermittent bed process, moving bed process and fluidized bed process, and each process has its own characteristics and applicable scenarios. In the intermittent bed process, the adsorbent is in a stationary state in the adsorption tower, and a single adsorption tower performs adsorption work, the product gas continuity is poor, and the pressure is unstable; in the moving bed process, two or more adsorption towers perform adsorption work, the product gas continuity is good, and the pressure is very stable; in the fluidized bed process, the adsorbent is in a flowing state in the adsorption tower, and the adsorption process and regeneration process are completed in the flow process, the product gas continuity is the best, and the pressure is the most stable. The development of these technologies provides more options and possibilities for the application of pressure swing adsorption technology.

[0004] In the prior art, there are some problems in the pressure swing adsorption process, such as system pressure fluctuations leading to fluctuations in the operation of the adsorption tower, which in turn affects the quality of the purified gas. There are also problems such as insufficient operational flexibility, poor real-time monitoring capabilities, high energy consumption, and poor maintenance scalability.

[0005] Therefore, it is urgent to propose a small adsorption tower experimental equipment and a method of using the same to solve the problem that the equipment parameters cannot be quickly adjusted and the optimal adsorbent cannot be screened. Summary of the invention

[0006] In view of the above facts, in order to solve the problem that equipment parameters cannot be quickly adjusted and the optimal adsorbent cannot be screened, the present invention further designs a small adsorption tower experimental equipment and a method of using the same.

[0007] To achieve the above object, the present invention adopts the following technical solution:

[0008] Solution 1: A small adsorption tower experimental equipment, including a first gas cylinder, a second gas cylinder, a mixing tank, a booster pump, a first flow controller, a check valve, a pressure gauge, an adsorption tower, a second flow controller, a gas analyzer, and a vacuum pump;

[0009] The first gas cylinder is connected to the first pipeline, and the first valve is installed on the first pipeline. The second gas cylinder is connected to the second pipeline, and the second valve is installed on the second pipeline. The first pipeline and the second pipeline merge into a third pipeline. A mixing tank, a third valve, a booster pump, a first flow controller, a check valve, an adsorption tower, a fourth valve, a second flow controller, and a gas analyzer are installed on the third pipeline in sequence. The pressure gauge is connected to the top of the adsorption tower through the fourth pipeline, and the fifth valve, a vacuum pump, and a sixth valve are connected to the bottom of the adsorption tower in sequence through the fifth pipeline. The right connection point is on the third pipeline on the right side of the gas analyzer.

[0010] Furthermore: it also includes a PLC control system, which wirelessly controls the first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve, the check valve, the booster pump, the vacuum pump, the first flow controller, the second flow controller, the pressure gauge and the gas analyzer.

[0011] Further: the adsorption tower includes an adsorption tower body, a graphite pad, a rubber pad, a bolt, a baffle flange, and an adsorbent baffle;

[0012] The adsorbent baffle recessed portion above the adsorption tower body is in the tower body of the adsorption tower body, the upper horizontal portion of the adsorption tower body is in a two-layer stepped shape, with the outer portion being high and the middle portion being low, the horizontal portion of the adsorbent baffle being on the low step of the horizontal portion above the adsorption tower body, a baffle flange being installed above the adsorption tower body, and bolts being connected at the baffle flange and the high step of the horizontal portion above the adsorption tower body;

[0013] The adsorbent baffle recessed portion below the adsorption tower body is inside the tower body of the adsorption tower body, the lower horizontal portion of the adsorption tower body is in a two-layer stepped shape, with the outer portion being high and the middle portion being low, the horizontal portion of the adsorbent baffle being on the low step of the horizontal portion below the adsorption tower body, a baffle flange being installed below the adsorption tower body, and bolts being connected at the baffle flange and the high step of the horizontal portion below the adsorption tower body;

[0014] A graphite pad is installed in the gap between the high step of the horizontal part above the adsorption tower body and the baffle flange, and a rubber pad is installed in the gap between the low step of the horizontal part above the adsorption tower body, the horizontal part of the adsorbent baffle, and the baffle flange;

[0015] A graphite pad is installed in the gap between the high step of the horizontal part below the adsorption tower body and the baffle flange, and a rubber pad is installed in the gap between the low step of the horizontal part below the adsorption tower body, the horizontal part of the adsorbent baffle, and the baffle flange.

[0016] Further: a bolt hole, a pressure port and an air outlet are provided on the baffle flange above the adsorption tower body, the air outlet is located in the middle, the pressure port is located in the upper left, and the bolt holes are located around;

[0017] An air inlet and bolt holes are provided on the baffle flange below the adsorption tower body, wherein the air inlet is located in the middle and the bolt holes are located around.

[0018] Furthermore: an air port is provided on the recessed portion of the adsorbent baffle.

[0019] Furthermore, the sum of the thickness of the graphite pad and the step difference h3 of the horizontal part of the adsorption tower body is h1, the sum of the thickness of the two rubber pads and the horizontal part h4 of the adsorbent baffle is h2, and h1 is smaller than h2.

[0020] Solution 2: A method for using a small adsorption tower experimental device, the specific steps are:

[0021] Step 1, open the first valve and the second valve, mix the gas components to be adsorbed, and open the third valve after the gas enters the mixing tank;

[0022] Step 2: Start the booster pump, the check valve and the first flow controller. After the adsorption tower reaches the set pressure, open the fourth valve and the second flow controller to enter the gas analyzer for real-time gas detection;

[0023] Step 3, close all valves, open the fifth valve and the sixth valve, start the vacuum pump, and vacuum desorb the adsorbent in the adsorption tower;

[0024] Step 4: Analyze and verify the performance of the adsorbent and explore the optimal pressure swing adsorption process of the adsorbent.

[0025] Furthermore: the value of the pressure in step 2 includes 0.3MPa, 0.4MPa or 0.5MPa.

[0026] The beneficial effects of the present invention are:

[0027] 1. The present invention adds an adjustable operating system and real-time monitoring technology, so that users can quickly adjust equipment parameters according to experimental requirements to achieve real-time monitoring and data analysis of the adsorption process.

[0028] 2. The present invention explores the pressure swing adsorption process by testing the adsorbent performance test, so that it can achieve the best actual process requirements of the pressure swing adsorption tower and the best performance of the adsorbent use.

[0029] 3. The present invention effectively reduces energy consumption through experimental design and optimization. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the present invention;

[0031] Figure 2 It is a structural schematic diagram of the adsorption tower in the device of the present invention;

[0032] Figure 3 It is a top view of the baffle flange above the adsorption tower;

[0033] Figure 4 is a top view of an adsorbent baffle above the adsorption tower;

[0034] Figure 5 It is the main view of the horizontal part of the adsorption tower body in the adsorption tower;

[0035] Figure 6 This is the front view of the adsorbent baffle above the adsorption tower.

[0036] In the figure: 1-first gas cylinder, 2-second gas cylinder, 3-mixing tank, 4-boosting pump, 5-first flow controller, 6-check valve, 7-adsorption tower, 8-second flow controller, 9-gas analyzer, 10-vacuum pump, 11-pressure gauge, 12-PLC control system, 13-first valve, 14-second valve, 15-third valve, 16-fourth valve, 17-fifth valve, 18-sixth valve, 19-graphite pad, 20-rubber pad, 21-baffle flange, 22-adsorbent baffle, 23-bolt, 24-adsorption tower body, 25-pressure port, 26-gas outlet, 27-gas inlet, 28-bolt hole, 29-gas port. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0038] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0039] In the present application, the directions or positional relationships indicated by the terms "upper", "lower", "inner", "middle", "outer", "front", "back", etc. are based on the directions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction.

[0040] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0041] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0043] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0044] Embodiment 1: A small adsorption tower experimental equipment of this embodiment includes a first gas cylinder 1, a second gas cylinder 2, a mixing tank 3, a booster pump 4, a first flow controller 5, a check valve 6, a pressure gauge 11, an adsorption tower 7, a second flow controller 8, a gas analyzer 9, and a vacuum pump 10;

[0045] The first gas cylinder 1 is connected to the first pipeline, and the first valve 13 is installed on the first pipeline. The second gas cylinder 2 is connected to the second pipeline, and the second valve 14 is installed on the second pipeline. The first pipeline and the second pipeline merge into a third pipeline. The mixing tank 3, the third valve 15, the booster pump 4, the first flow controller 5, the check valve 6, the adsorption tower 7, the fourth valve 16, the second flow controller 8, and the gas analyzer 9 are installed in sequence on the third pipeline. The pressure gauge 11 is connected to the top of the adsorption tower 7 through the fourth pipeline, and the fifth valve 17, the vacuum pump 10, and the sixth valve 18 are connected to the bottom of the adsorption tower 7 through the fifth pipeline. The right connection point is on the third pipeline on the right side of the gas analyzer 9.

[0046] More specifically: it also includes a PLC control system 12, which wirelessly controls a first valve 13, a second valve 14, a third valve 15, a fourth valve 16, a fifth valve 17, a sixth valve 18, a check valve 6, a booster pump 4, a vacuum pump 10, a first flow controller 5, a second flow controller 8, a pressure gauge 11 and a gas analyzer 9.

[0047] More specifically: the first pipeline, the second pipeline, the third pipeline, the fourth pipeline, and the fifth pipeline are all stainless steel pipelines.

[0048] More specifically: the adsorption tower 7 includes an adsorption tower body 24, a graphite pad 19, a rubber pad 20, a bolt 23, a baffle flange 21, and an adsorbent baffle 22;

[0049] The recessed portion of the adsorbent baffle 22 above the adsorption tower body 24 is in the tower body of the adsorption tower body 24, and the upper horizontal portion of the adsorption tower body 24 is in a two-layer stepped shape, with the outer portion being high and the middle portion being low. The horizontal portion of the adsorbent baffle 22 is on the low step of the upper horizontal portion of the adsorption tower body 24, and a baffle flange 21 is installed above the adsorption tower body 24, and bolts 23 are connected at the baffle flange 21 and the upper horizontal portion of the adsorption tower body 24 at the high step;

[0050] The recessed portion of the adsorbent baffle 22 below the adsorption tower body 24 is in the tower body of the adsorption tower body 24, and the lower horizontal portion of the adsorption tower body 24 is in a two-layer stepped shape, with the outer portion being high and the middle portion being low. The horizontal portion of the adsorbent baffle 22 is on the low step of the horizontal portion below the adsorption tower body 24, and a baffle flange 21 is installed below the adsorption tower body 24, and bolts 23 are connected at the baffle flange 21 and the high step of the horizontal portion below the adsorption tower body 24;

[0051] A graphite pad 19 is installed in the gap between the high step of the horizontal part above the adsorption tower body 24 and the baffle flange 21, and a rubber pad 20 is installed in the gap between the low step of the horizontal part above the adsorption tower body 24, the horizontal part of the adsorbent baffle 22, and the baffle flange 21;

[0052] A graphite pad 19 is installed in the gap between the high step of the horizontal part below the adsorption tower body 24 and the baffle flange 21, and a rubber pad 20 is installed in the gap between the low step of the horizontal part below the adsorption tower body 24, the horizontal part of the adsorbent baffle 22, and the baffle flange 21.

[0053] More specifically: a bolt hole 28, a pressure port 25 and an air outlet 26 are provided on the baffle flange 21 above the adsorption tower body 24, the air outlet 26 is located in the middle, the pressure port 25 is located in the upper left, and the bolt holes 28 are located around;

[0054] An air inlet 27 and bolt holes 28 are provided on the baffle flange 21 below the adsorption tower body 24. The air inlet 27 is located in the middle, and the bolt holes 28 are located around.

[0055] More specifically, an air port 29 is provided on the recessed portion of the adsorbent baffle 22 .

[0056] More specifically: the sum of the thickness of the graphite pad 19 and the step difference h3 of the horizontal part of the adsorption tower body 24 is h1, the sum of the thickness of the two rubber pads 20 and the horizontal part h4 of the adsorbent baffle 22 is h2, and h1 is smaller than h2.

[0057] More specifically: when adding adsorbent, first remove the four screws, remove the adsorbent baffle 22 and the baffle flange 21, fill the adsorbent into the adsorption tower 7, put the rubber pad 20, the adsorbent baffle 22, then put the rubber pad 20 and the graphite pad 19, put the flange baffle 21, and install the four bolts 23; unloading is from the bottom, and the installation method is the same as above.

[0058] Example 2: A method for using a small adsorption tower experimental device in this example, the specific steps are:

[0059] Step 1, open the first valve 13 and the second valve 14, mix the gas components to be adsorbed, and open the third valve 15 after the gas enters the mixing tank 3;

[0060] Step 2, start the booster pump 4, the check valve 6 and the first flow controller 5, and after the adsorption tower 7 reaches the set pressure, open the fourth valve 16 and the second flow controller 8, and enter the gas analyzer 9 for real-time gas detection;

[0061] Step 3, close all valves, open the fifth valve 17 and the sixth valve 18, start the vacuum pump 10, and vacuum desorb the adsorbent in the adsorption tower 7;

[0062] Step 4: Analyze and verify the performance of the adsorbent and explore the optimal pressure swing adsorption process of the adsorbent.

[0063] More specifically: the gas components adsorbed in step 1 can be arbitrary, for example, separation of biogas, simulation of 60% methane and 40% carbon dioxide in biogas, separation of oxygen and nitrogen in air, etc.

[0064] More specifically: the pressure value in step 2 includes 0.3MPa, 0.4MPa or 0.5MPa.

[0065] More specifically: the stop valve 6 in step 2 prevents the pressure in the adsorption tower from being too high and flowing back to the mixing tank 3.

[0066] More specifically: the analysis in step 4 refers to gradually increasing the pressure and then analyzing the discharged gas components through the gas analyzer 9 to determine the adsorption effect, and the verification refers to directly pressurizing to the required pressure and analyzing the discharged gas components through the gas analyzer 9 to verify the adsorption effect.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, the technical solutions described in the aforementioned embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents. As long as there is no structural conflict, the various features in the specific implementation methods disclosed in this application can be combined with each other in any way, and the essence of the corresponding technical solutions will not deviate from the scope of the technical solutions of the present invention.

[0068] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A small adsorption tower experimental equipment, characterized in that: It comprises a first gas cylinder (1), a second gas cylinder (2), a mixing tank (3), a booster pump (4), a first flow controller (5), a check valve (6), a pressure gauge (11), an adsorption tower (7), a second flow controller (8), a gas analyzer (9), and a vacuum pump (10); The first gas cylinder (1) is connected to a first pipeline, a first valve (13) is installed on the first pipeline, the second gas cylinder (2) is connected to a second pipeline, a second valve (14) is installed on the second pipeline, the first pipeline and the second pipeline merge into a third pipeline, a mixing tank (3), a third valve (15), a booster pump (4), a first flow controller (5), a check valve (6), an adsorption tower (7), a fourth valve (16), a second flow controller (8), and a gas analyzer (9) are installed in sequence on the third pipeline, the top of the adsorption tower (7) is connected to a pressure gauge (11) through the fourth pipeline, the bottom of the adsorption tower (7) is connected to a fifth valve (17), a vacuum pump (10), and a sixth valve (18) in sequence through a fifth pipeline, and the right connection point is on the third pipeline on the right side of the gas analyzer (9).

2. A small adsorption tower experimental equipment according to claim 1, characterized in that: The invention also comprises a PLC control system (12), wherein the PLC control system (12) wirelessly controls a first valve (13), a second valve (14), a third valve (15), a fourth valve (16), a fifth valve (17), a sixth valve (18), a check valve (6), a booster pump (4), a vacuum pump (10), a first flow controller (5), a second flow controller (8), a pressure gauge (11) and a gas analyzer (9).

3. A small adsorption tower experimental equipment according to claim 1 or 2, characterized in that: The adsorption tower (7) comprises an adsorption tower body (24), a graphite pad (19), a rubber pad (20), bolts (23), a baffle flange (21), and an adsorbent baffle (22); The adsorbent baffle (22) above the adsorption tower body (24) has a recessed portion inside the tower body of the adsorption tower body (24); the upper horizontal portion of the adsorption tower body (24) is in a two-layer stepped shape, with the outer portion being higher and the middle portion being lower; the horizontal portion of the adsorbent baffle (22) is on the lower step of the upper horizontal portion of the adsorption tower body (24); a baffle flange (21) is installed above the adsorption tower body (24); bolts (23) are connected at the baffle flange (21) and the upper horizontal portion of the adsorption tower body (24); The recessed portion of the adsorbent baffle (22) below the adsorption tower body (24) is inside the tower body of the adsorption tower body (24); the horizontal portion below the adsorption tower body (24) is in a two-layer stepped shape, with the outer portion being higher and the middle portion being lower; the horizontal portion of the adsorbent baffle (22) is on the lower step of the horizontal portion below the adsorption tower body (24); a baffle flange (21) is installed below the adsorption tower body (24); and bolts (23) are connected at the baffle flange (21) and the higher step of the horizontal portion below the adsorption tower body (24); A graphite pad (19) is installed in the gap between the high step of the horizontal part above the adsorption tower body (24) and the baffle flange (21), and a rubber pad (20) is installed in the gap between the low step of the horizontal part above the adsorption tower body (24), the horizontal part of the adsorbent baffle (22), and the baffle flange (21); A graphite gasket (19) is installed in the gap between the high step of the horizontal part below the adsorption tower body (24) and the baffle flange (21), and a rubber gasket (20) is installed in the gap between the low step of the horizontal part below the adsorption tower body (24), the horizontal part of the adsorbent baffle (22), and the baffle flange (21).

4. A small adsorption tower experimental equipment according to claim 3, characterized in that: The baffle flange (21) above the adsorption tower body (24) is provided with bolt holes (28), a pressure port (25) and an air outlet (26), wherein the air outlet (26) is located in the middle, the pressure port (25) is located at the upper left, and the bolt holes (28) are located around the periphery; An air inlet (27) and bolt holes (28) are provided on the baffle flange (21) below the adsorption tower body (24), wherein the air inlet (27) is located in the middle and the bolt holes (28) are located around the periphery.

5. A small adsorption tower experimental equipment according to claim 3, characterized in that: An air port (29) is provided on the recessed portion of the adsorbent baffle (22).

6. A small adsorption tower experimental equipment according to claim 3, characterized in that: The sum of the thickness of the graphite pad (19) and the step difference h3 of the horizontal part of the adsorption tower body (24) is h1, and the sum of the thickness of the two rubber pads (20) and the horizontal part h4 of the adsorbent baffle (22) is h2, and h1 is smaller than h2.

7. The method for using the small adsorption tower experimental equipment according to any one of claims 1 to 6, characterized in that: The specific steps are: Step 1, open the first valve and the second valve, mix the gas components to be adsorbed, and open the third valve after the gas enters the mixing tank; Step 2: Start the booster pump, the check valve and the first flow controller. After the adsorption tower reaches the set pressure, open the fourth valve and the second flow controller to enter the gas analyzer for real-time gas detection; Step 3, close all valves, open the fifth valve and the sixth valve, start the vacuum pump, and vacuum desorb the adsorbent in the adsorption tower; Step 4: Analyze and verify the performance of the adsorbent and explore the optimal pressure swing adsorption process of the adsorbent.

8. The method for using the small adsorption tower experimental equipment according to claim 7, characterized in that: The pressure in step 2 may be 0.3 MPa, 0.4 MPa or 0.5 MPa.

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