A zeolite adsorption pilot plant

Abstract

The utility model discloses a zeolite adsorption small test device, first adsorption pipe inside is located first feeding port both sides and is provided with first screen cloth, first adsorption pipe inside and be located between two first screen cloth and fill with first zeolite, first adsorption pipe one side is provided with first bypass pipe, and first bypass pipe is connected with the air inlet detection mouth through the valve, second adsorption pipe inside is located second feeding port both sides and is provided with second screen cloth, second adsorption pipe inside and be located between two second screen cloth and fill with second zeolite, second adsorption pipe one side is provided with second bypass pipe, and second bypass pipe is connected with the air outlet detection mouth through the valve, and second adsorption pipe is connected with first adsorption pipe through first quick -operation joint, the utility model discloses reasonable in structure can analyze the influence of different zeolite component, adsorption time etc. Process condition to waste gas treatment effect in short time, highly portable, plug and play.

Description

Technical Field

[0001] This utility model relates to the field of VOC waste gas treatment technology, specifically a zeolite adsorption pilot device. Background Technology

[0002] In the VOC waste gas treatment industry, many zeolite rotary equipment manufacturers quickly finalize treatment processes, zeolite selection, equipment configuration, and sign contracts based solely on a written data sheet on waste gas composition and flow rate provided by the client, or after a brief site visit. This project decision-making approach, while seemingly efficient, actually harbors significant hidden dangers. The results often include: substandard zeolite system treatment efficiency after equipment installation, operating costs far exceeding expectations, equipment inability to adapt to fluctuations in waste gas concentration or composition, and even frequent malfunctions and shutdowns. Ultimately, the client suffers investment losses, environmental pressures remain unresolved, the manufacturer's reputation is damaged, and they are trapped in an endless cycle of after-sales service and modifications. Every company's production processes, raw materials, and operating conditions are unique, and the waste gas generated cannot be summarized by a few simple figures. Therefore, before finalizing equipment configuration or signing a contract, equipment manufacturers must conduct in-depth, scientific, and systematic small-scale trials at the client's production site. Through continuous sampling, monitoring, and testing in pilot-scale trials, the fluctuation patterns and characteristics can be accurately captured, providing a solid data foundation for subsequent design, construction, and commissioning. Therefore, there is an urgent need to provide a zeolite adsorption pilot-scale device to solve this problem existing in the current technology. Summary of the Invention

[0003] The purpose of this utility model is to provide a zeolite adsorption pilot device to solve the problems caused by the high complexity and uncertainty of VOC waste gas treatment, such as the zeolite system failing to meet the treatment efficiency after the final ordered equipment is installed, the operating cost far exceeding expectations, the equipment being unable to adapt to fluctuations in waste gas concentration or composition, or even frequent malfunctions and shutdowns.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a zeolite adsorption pilot device, comprising an inlet zeolite adsorption module, an outlet zeolite adsorption module, and a variable frequency fan. The inlet-end zeolite adsorption module includes a first adsorption tube, a first screen, a first zeolite, a first bypass pipe, and an inlet detection port. The upper surface of the first adsorption tube is provided with a first feeding port, which is threadedly connected to a first feeding cover plate. The lower surface of the first adsorption tube is coaxially provided with a first discharge port, which is threadedly connected to a first discharge cover plate. The inside of the first adsorption tube is provided with first screens on both sides of the first feeding port, and the inside of the first adsorption tube and between the two first screens is filled with first zeolite. A first bypass pipe is provided on one side of the first adsorption tube, and the first bypass pipe is connected to the inlet detection port through a valve. The zeolite adsorption module at the outlet includes a second adsorption tube, a second screen, a second zeolite, a second bypass pipe, and an outlet detection port. A second feeding port is provided on the upper surface of the second adsorption tube, and a second feeding cover plate is threadedly connected to the second feeding port. A second discharge port is provided on the lower surface of the second adsorption tube, coaxial with the second feeding port, and a second discharge cover plate is threadedly connected to the second discharge port. A second screen is provided inside the second adsorption tube on both sides of the second feeding port. The second zeolite is filled inside the second adsorption tube and between the two second screens. A second bypass pipe is provided on one side of the second adsorption tube, and the second bypass pipe is connected to the outlet detection port through a valve. The second adsorption tube is connected to the first adsorption tube through a first quick connector. The end of the first adsorption tube furthest from the second adsorption tube is connected to the outlet of the variable frequency fan via a threaded interface, and the inlet of the variable frequency fan is connected to the sampling hose via a second quick connector.

[0005] Preferably, in the zeolite adsorption pilot device provided by this utility model, a flow meter is connected to the end of the second adsorption tube away from the first adsorption tube, and an outlet pipe is connected to the end of the flow meter away from the second adsorption tube.

[0006] Preferably, in the zeolite adsorption pilot device provided by this utility model, the first bypass pipe is disposed between the first zeolite and the variable frequency fan.

[0007] Preferably, in the zeolite adsorption pilot device provided by this utility model, the second bypass pipe is disposed between the second zeolite and the flow meter.

[0008] Compared with the prior art, the beneficial effects of this utility model are: 1. It can analyze the effects of different zeolite components, adsorption time and other process conditions on the waste gas treatment effect in a short time. The second adsorption tube is connected to the first adsorption tube through the first quick connector. The first adsorption tube is connected to the outlet of the variable frequency fan through the threaded interface. The inlet of the variable frequency fan is connected to the sampling hose through the second quick connector, which facilitates the installation and disassembly of the first and second adsorption tubes and greatly improves convenience.

[0009] The first adsorption tube is located between two first screens and has a first feed port and a first discharge port. The first feed port is threadedly connected to a first feed cover plate, and the first discharge port is threadedly connected to a first discharge cover plate. The second feed port is threadedly connected to a second feed cover plate, and the second discharge port is threadedly connected to a second discharge cover plate. During multiple sampling tests, the zeolite can be directly removed and replaced without disassembling the first and second adsorption tubes, which greatly improves convenience and saves costs. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model.

[0011] In the diagram: 1. First adsorption tube; 2. First screen; 3. First zeolite; 4. First bypass pipe; 5. Inlet detection port; 6. First feed port; 7. First feed cover plate; 8. First discharge port; 9. First discharge cover plate; 10. Second adsorption tube; 11. Second screen; 12. Second zeolite; 13. Second bypass pipe; 14. Outlet detection port; 15. Second feed port; 16. Second feed cover plate; 17. Second discharge port; 18. Second discharge cover plate; 19. First quick connector; 20. Variable frequency fan; 21. Second quick connector; 22. Sampling hose; 23. Threaded interface; 24. Flow meter; 25. Outlet pipe. Detailed Implementation

[0012] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. It should be noted that in the description of this utility model, the terms "inner", "outer", "upper", "lower", "both sides", "one end", "the other end", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0013] Please see Figure 1 This utility model provides a technical solution: a zeolite adsorption pilot device, including an inlet zeolite adsorption module, an outlet zeolite adsorption module and a variable frequency fan 20. The inlet-end zeolite adsorption module includes a first adsorption tube 1, a first screen 2, a first zeolite 3, a first bypass pipe 4, and an inlet detection port 5. A first feeding port 6 is provided on the upper surface of the first adsorption tube 1, and a first feeding cover plate 7 is threadedly connected to the first feeding port 6. A first discharge port 8 is provided on the lower surface of the first adsorption tube 1, coaxial with the first feeding port 6, and a first discharge cover plate 9 is threadedly connected to the first discharge port 8. A first screen 2 is provided on both sides of the first feeding port 6 inside the first adsorption tube 1, and the first zeolite 3 is filled inside the first adsorption tube 1 and between the two first screens 2. A first bypass pipe 4 is provided on one side of the first adsorption tube 1, and the first bypass pipe 4 is connected to the inlet detection port 5 through a valve. The first bypass pipe 4 is located between the first zeolite 3 and the variable frequency fan 20 to realize the detection of the original exhaust gas concentration through the inlet detection port 5. The zeolite adsorption module at the outlet includes a second adsorption tube 10, a second screen 11, a second zeolite 12, a second bypass pipe 13, and an outlet detection port 14. A second feeding port 15 is provided on the upper surface of the second adsorption tube 10, and a second feeding cover plate 16 is threadedly connected to the second feeding port 15. A second discharge port 17 is provided on the lower surface of the second adsorption tube 10, coaxial with the second feeding port 15, and a second discharge cover plate 18 is threadedly connected to the second discharge port 17. The interior of the second adsorption tube 10 is located within the second feeding port 14. 5. A second screen 11 is provided on both sides. The second adsorption tube 10 is filled with a second zeolite 12 inside and between the two second screens 11. A second bypass pipe 13 is provided on one side of the second adsorption tube 10. The second bypass pipe 13 is connected to an outlet detection port 14 through a valve. The second bypass pipe 13 is located between the second zeolite 12 and the flow meter 24 so as to detect the concentration of the treated waste gas through the outlet detection port 14. The second adsorption tube 10 is connected to the first adsorption tube 1 through a first quick connector 19. The end of the first adsorption tube 1 furthest from the second adsorption tube 10 is connected to the outlet of the variable frequency fan 20 via a threaded interface 23, and the inlet of the variable frequency fan 20 is connected to the sampling hose 22 via a second quick connector 21. The second adsorption tube 10 is connected to a flow meter 24 at the end furthest from the first adsorption tube 1, so as to display and accurately control the gas flow rate through the zeolite module in real time. The flow meter 24 is connected to an outlet pipe 25 at the end furthest from the second adsorption tube 10, so that the gas can be discharged through the outlet pipe 25.

[0014] Usage and Principle: Place the variable frequency fan 20 in the workshop. The airflow of the variable frequency fan 20 should be precisely adjusted within the range of 0.1 - 3 m³ / h (accuracy ±1%) to simulate different air velocities. Connect a sampling hose 22 to the exhaust gas source (such as a pipe or workshop opening). Remove the inlet and outlet zeolite adsorption modules. Connect the first adsorption tube 1 to the outlet of the variable frequency fan 20 via a threaded interface. Connect the second adsorption tube 10 to the first adsorption tube 1 via a first quick connector 19. Connect the end of the second adsorption tube 10 away from the first adsorption tube 1 to the outlet pipe 25 via a flow meter 24. Before use, directly insert the probe of the portable PID detector into the inlet detection port 5 and the outlet detection port 14 to read the VOC concentration changes in real time and plot the penetration curve. During use, start the variable frequency fan 20, set the required flow rate, and simultaneously start the portable PID detector to monitor the concentration at the inlet detection port 5 and the outlet detection port 14 respectively. Data collection and observation on the PID controller revealed the zeolite saturation or breakthrough time, which directly reflects the effective working time of the zeolite under that condition. Both the inlet detection port 5 and the outlet detection port 14 are standard DN15 interfaces. Inlet detection port 5 is located before the first zeolite 3 in the mass flow meter 24 and is used to detect the initial exhaust gas concentration. Outlet detection port 14 is located after the first zeolite 3 and the second zeolite 12 and is used to detect the concentration of the treated exhaust gas. The variable frequency fan 20 was turned off, and the first discharge cover 9 and the second discharge cover 18 were opened. The saturated first zeolite 3 and the second zeolite 12 were removed and immediately placed in a sealed bag (labeled with customer information, date, zeolite type, and test conditions). The first discharge cover 9 and the second discharge cover 18 were closed, and the first feeding cover 7 and the second feeding cover 16 were opened. New first zeolite 3 and second zeolite 12 were added, and the first feeding cover 7 and the second feeding cover 16 were closed. The above steps were repeated. All saturated zeolite tube modules were brought back to the laboratory. The zeolite tubes are thoroughly desorbed in a standard thermal desorption apparatus in the laboratory, and the total amount of VOCs adsorbed by each zeolite tube module is precisely quantified, thereby scientifically calculating its saturation adsorption capacity. Both the first adsorption tube 1 and the second adsorption tube 10 are made of stainless steel to minimize the interference of tube wall adsorption on the test results. The first quick connector 19 and the second quick connector 21 are both quick-connect plugs, enabling tool-free rapid assembly. A digital mass flow meter 24 is installed inside the apparatus to display and precisely control the gas flow rate through the zeolite modules in real time.This invention has a reasonable structure and can analyze the impact of different zeolite components, adsorption time, and other process conditions on the waste gas treatment effect in a short time. The second adsorption tube 10 is connected to the first adsorption tube 1 through the first quick connector 19. The first adsorption tube 1 is connected to the outlet of the variable frequency fan 20 through a threaded interface. The inlet of the variable frequency fan 20 is connected to the sampling hose 22 through the second quick connector 21, which facilitates the installation and disassembly of the first adsorption tube 1 and the second adsorption tube 10, greatly improving convenience. At the same time, the first adsorption tube 1 is provided with a first feeding port 6 and a first discharge port 8 between the two first screens 2. The first feeding port 6 is threadedly connected to the first feeding cover plate 7, the first discharge port 8 is threadedly connected to the first discharge cover plate 9, the second feeding port 15 is threadedly connected to the second feeding cover plate 16, and the second discharge port 17 is threadedly connected to the second discharge cover plate 18. During multiple sampling tests, the zeolite can be directly removed and replaced without disassembling the first adsorption tube 1 and the second adsorption tube 10, greatly improving convenience and saving costs.

[0015] Any aspects of this utility model not described in detail are well-known technologies to those skilled in the art.

[0016] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications and equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A zeolite adsorption bench scale unit characterized by: It includes an inlet zeolite adsorption module, an outlet zeolite adsorption module, and a variable frequency fan (20). The inlet zeolite adsorption module includes a first adsorption tube (1), a first screen (2), a first zeolite (3), a first bypass pipe (4), and an inlet detection port (5). The upper surface of the first adsorption tube (1) is provided with a first feeding port (6), and the first feeding port (6) is threadedly connected to a first feeding cover plate (7). The lower surface of the first adsorption tube (1) is coaxially provided with a first discharge port (8), and the first discharge port (8) is threadedly connected to a first discharge cover plate (9). The inside of the first adsorption tube (1) is provided with a first screen (2) on both sides of the first feeding port (6). The inside of the first adsorption tube (1) and between the two first screens (2) is filled with a first zeolite (3). The first bypass pipe (4) is provided on one side of the first adsorption tube (1), and the first bypass pipe (4) is connected to the inlet detection port (5) through a valve. The zeolite adsorption module at the outlet includes a second adsorption tube (10), a second screen (11), a second zeolite (12), a second bypass pipe (13), and an outlet detection port (14). A second feeding port (15) is provided on the upper surface of the second adsorption tube (10), and a second feeding cover plate (16) is threadedly connected to the second feeding port (15). A second discharge port (17) is provided on the lower surface of the second adsorption tube (10) coaxially with the second feeding port (15), and a second discharge port (17) is threadedly connected to the second discharge port (17). The cover plate (18) has a second screen (11) located on both sides of the second feed port (15) inside the second adsorption tube (10). The second zeolite (12) is filled inside the second adsorption tube (10) and between the two second screens (11). A second bypass pipe (13) is provided on one side of the second adsorption tube (10). The second bypass pipe (13) is connected to the gas outlet detection port (14) through a valve. The second adsorption tube (10) is connected to the first adsorption tube (1) through a first quick connector (19). The end of the first adsorption tube (1) away from the second adsorption tube (10) is connected to the outlet end of the variable frequency fan (20) through a threaded interface (23), and the inlet end of the variable frequency fan (20) is connected to the sampling hose (22) through a second quick connector (21).

2. A zeolite adsorption bench-scale unit according to claim 1, characterized in that: The second adsorption tube (10) is connected to a flow meter (24) at the end away from the first adsorption tube (1), and the flow meter (24) is connected to an outlet pipe (25) at the end away from the second adsorption tube (10).

3. A small scale zeolite adsorption unit as claimed in claim 1, wherein: The first bypass pipe (4) is located between the first zeolite (3) and the variable frequency fan (20).

4. A small scale zeolite adsorption unit as claimed in claim 1, wherein: The second bypass pipe (13) is disposed between the second zeolite (12) and the flow meter (24).

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