A compressed air removal device

Abstract

The utility model provides a compressed air removal device, including controller, flow control valve and two parallelly arranged adsorption jar no.

Description

Technical Field

[0001] This utility model relates to the field of environmental monitoring technology, and in particular to a compressed air removal device for environmental monitoring. Background Technology

[0002] In recent years, the global temperature rise caused by the greenhouse effect has attracted widespread attention from the international community. In order to address these environmental problems, countries have formulated relevant regulations and standards, requiring relevant combustion emission enterprises to monitor CO2 emissions and assess whether their carbon emissions comply with relevant regulations and standards, so as to ensure environmental safety and human health.

[0003] Current CO2 emission monitoring technologies for fuel combustion mainly employ two sampling methods: direct sampling and dilution-mixing sampling. The dilution-mixing sampling method requires clean compressed air as the motive gas, which is mixed with an equal volume of flue gas before analysis. If the motive gas contains CO2, it will severely interfere with the measurement results. Therefore, when measuring CO2 content, it is necessary to completely remove any CO2 from the compressed air to avoid affecting the accuracy of the measurement.

[0004] Currently, when monitoring CO2 emissions, CO2 is generally removed from compressed air by filling a container with a desorbent to generate a diluted and mixed sampling motive gas. This requires regular replacement of the adsorbent tank, which reduces the removal efficiency and results in high maintenance costs. In addition, the water and oil content of compressed air can change, affecting the replacement cycle of the desorbent and causing problems with untimely replacement, leading to inaccurate monitoring data. Utility Model Content

[0005] The present invention aims to provide a compressed air removal device to overcome the shortcomings of the prior art.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is: a compressed air removal device, including a controller, a flow control valve, and two adsorption tanks, a first adsorption tank and a second adsorption tank, arranged in parallel. The first adsorption tank has an inlet branch and an exhaust branch at its first end, and a purified exhaust branch and a regeneration inlet branch at its second end. The second adsorption tank has an inlet branch and an exhaust branch at its first end, and a purified exhaust branch and a regeneration inlet branch at its second end. The inlet branch and the inlet branch are connected in parallel and are both connected to an inlet pipe. The intake pipe is used for air intake. The first and second purified air outlet branches are connected in parallel and are both connected to the outlet pipe. The outlet pipe is used to discharge purified air as the driving gas for dilution and sampling by the emission detection system. The first and second regeneration intake branches are connected in parallel. The flow control valve is located between the first and second regeneration intake branches and is connected to the outlet pipe. The flow control valve is used to connect the first purified air outlet branch and the second regeneration intake branch, or to connect the second purified air outlet branch and the first regeneration intake branch. The controller is electrically connected to the flow control valve.

[0007] Furthermore, in the aforementioned compressed air removal device, an intake valve is provided on the first intake branch, an exhaust valve is provided on the first exhaust branch, an intake valve is provided on the second intake branch, and an exhaust valve is provided on the second exhaust branch.

[0008] Furthermore, in the aforementioned compressed air removal device, a one-way valve is provided on the first purified air outlet branch, and a one-way valve is provided on the second purified air outlet branch.

[0009] Furthermore, in the aforementioned compressed air removal device, a one-way balance valve is provided on the first regeneration air intake branch, and a one-way balance valve is provided on the second regeneration air intake branch.

[0010] Furthermore, in the aforementioned compressed air removal device, a detection pipeline is provided between the first and second ends of the first adsorption tank, and a differential pressure transmitter is provided on the first detection pipeline; a detection pipeline is provided between the first and second ends of the second adsorption tank, and a differential pressure transmitter is provided on the second detection pipeline; the differential pressure transmitters one and two are respectively used to detect the pressure difference change between the first and second ends of the first and second adsorption tanks, and both the differential pressure transmitters one and two are electrically connected to the controller.

[0011] Furthermore, in the aforementioned compressed air removal device, both the first and second ends of the adsorption tank one and the adsorption tank two are equipped with airflow distributors.

[0012] Furthermore, in the above-mentioned compressed air removal device, along the direction from the first end to the second end, the interiors of both the first adsorption tank and the second adsorption tank are provided with an oil removal layer, a deep drying layer and a CO2 removal layer arranged sequentially.

[0013] Compared with the prior art, the advantages of this utility model are: the utility model has a simple structure. By setting two adsorption tanks that alternately adsorb and regenerate, the adsorbent can be recycled. It can achieve continuous removal of compressed air without frequent replacement of the removal agent. It can also automatically switch the adsorption and regeneration processes of the adsorption tanks. The operation and maintenance costs are low, and the removal efficiency is high and stable. It is suitable for providing a long-term and reliable CO2-free power source for dilution CO2 monitoring systems. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the compressed air removal device of this utility model; In the diagram: 1. Controller; 2. Flow control valve; 3. Adsorption tank one; 31. Inlet branch one; 32. Exhaust branch one; 33. Purified exhaust branch one; 34. Regeneration inlet branch one; 35. Inlet valve one; 36. Exhaust valve one; 37. Check valve one; 38. Check balance valve one; 39. Differential pressure transmitter one; 4. Adsorption tank two; 41. Inlet branch two; 42. Exhaust branch two; 43. Purified exhaust branch two; 44. Regeneration inlet branch two; 45. Inlet valve two; 46. Exhaust valve two; 47. Check valve two; 48. Check balance valve two; 49. Differential pressure transmitter two; 5. Inlet pipe; 6. Outlet pipe; 7. Airflow distributor; 8. Oil removal layer; 9. Deep drying layer; 10. CO2 removal layer. Detailed Implementation

[0016] The technical solutions of the present 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 the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Example like Figure 1As shown, a compressed air removal device includes a controller 1, a flow control valve 2, and two adsorption tanks, a first adsorption tank 3 and a second adsorption tank 4, arranged in parallel. The first end of the first adsorption tank 3 has an inlet branch 31 and an exhaust branch 32, and the second end of the first adsorption tank 3 has a purified exhaust branch 33 and a regeneration inlet branch 34. The first end of the second adsorption tank 4 has an inlet branch 41 and an exhaust branch 42, and the second end of the second adsorption tank 4 has a purified exhaust branch 43 and a regeneration inlet branch 44. The inlet branches 31 and 41 are connected in parallel and are both connected to an inlet pipe 5, which is used to intake unremoved compressed air. The purified exhaust branches 33 and 43 are connected in parallel and are both connected to an outlet pipe 6, which is used to discharge purified air. The emission detection system dilutes the sampling power gas. Purified air outlet branch 1 33 and purified air outlet branch 2 43 form a purified air outlet pipeline. Regeneration air inlet branch 1 34 and regeneration air inlet branch 2 44 are connected in parallel to form a regeneration air inlet pipeline. Controller 1 is electrically connected to flow control valve 2. Flow control valve 2 is located between regeneration air inlet branch 1 34 and regeneration air inlet branch 2 44 and is connected to outlet pipe 6. Flow control valve 2 is used to connect purified air outlet branch 1 33 and regeneration air inlet branch 2 44, or connect purified air outlet branch 2 43 and regeneration air inlet branch 1 34, so that adsorption tank 1 3 and adsorption tank 2 4 can adsorb and regenerate alternately, so that the adsorbent can be recycled. Continuous removal of compressed air can be achieved without frequent replacement of the removal agent, which improves the removal efficiency and greatly reduces the removal cost.

[0018] In the above structure, such as Figure 1 As shown, intake branch 1 31 is equipped with intake valve 35, exhaust branch 1 32 is equipped with exhaust valve 36, intake branch 2 41 is equipped with intake valve 45, and exhaust branch 2 42 is equipped with exhaust valve 46. The intake valves enable or disable the intake branch, and the exhaust valves enable or disable the exhaust branch, thus precisely controlling the removal process.

[0019] One-way valve 37 is installed on the purified air outlet branch 1 33, and one-way balance valve 38 is installed on the regeneration air inlet branch 1 34; one-way valve 47 is installed on the purified air outlet branch 2 43, and one-way balance valve 48 is installed on the regeneration air inlet branch 2 44. The regeneration process is automatically controlled by the one-way valves and one-way balance valves, which has a simple structure, low energy consumption, and reduces the removal cost.

[0020] In one embodiment, a preset time for switching can be set by the composition of compressed air, and the controller 1 controls the switching state of adsorption tank 3 and adsorption tank 4 through the preset time.

[0021] In another embodiment, such as Figure 1As shown, a detection pipeline 1 is provided between the first and second ends of adsorption tank 3, and a differential pressure transmitter 39 is installed on the detection pipeline 1; a detection pipeline 2 is provided between the first and second ends of adsorption tank 4, and a differential pressure transmitter 49 is installed on the detection pipeline 2; the differential pressure transmitters 39 and 49 are used to detect the pressure difference changes between the first and second ends of adsorption tank 3 and adsorption tank 4, respectively, and both differential pressure transmitters 39 and 49 are electrically connected to controller 1. When the adsorbent is saturated, the pressure difference between the two ends of the adsorption tank increases. When either differential pressure transmitter 39 or differential pressure transmitter 49 detects that the pressure difference has increased to a preset value, it sends a signal to the controller. The controller controls the switching state of adsorption tank 3 and adsorption tank 4, realizing intelligent switching between adsorption and regeneration. It can be applied to the removal of compressed air with different compositions, has good flexibility, avoids the problem of untimely switching, improves removal efficiency, and provides a continuous and stable power source for the emission detection system.

[0022] like Figure 1 As shown, both the first and second ends of adsorption tank 3 and adsorption tank 4 are equipped with airflow distributors 7 to ensure uniform airflow distribution and achieve better removal and regeneration effects.

[0023] Along the direction from the first end to the second end, both adsorption tank 3 and adsorption tank 4 are provided with an oil removal layer 8, a deep drying layer 9 and a CO2 removal layer 10 arranged sequentially inside to remove oil, water and CO2 from the compressed air. The oil removal layer 8, the deep drying layer 9 and the CO2 removal layer 10 form a gradient design to achieve better removal and regeneration effects.

[0024] The working principle of this utility model is as follows: Assuming the initial state is that the adsorption tank 1 3 adsorbs and the adsorption tank 2 4 regenerates, at this time, the air inlet valve 1 35 and the exhaust valve 2 46 are open, and the air inlet valve 2 45 and the exhaust valve 1 36 are closed.

[0025] The adsorption process is as follows: Unpurified compressed air enters from the inlet pipe 5, enters the first end of the adsorption tank 3 through the inlet branch 31, and is evenly distributed by the airflow distributor 7 at the first end. It then passes through the internal oil removal layer 8, deep drying layer 9 and CO2 removal layer 10 for gradient purification to obtain purified air. Finally, it is collected by the distributor 7 at the second end and discharged into the purified air outlet branch 33. When the collected purified air reaches the opening pressure of the one-way valve 37, it opens the one-way valve 37 and is discharged from the outlet pipe 6 to supply the monitoring system.

[0026] The intelligent regeneration process is as follows: While generating purified air, the controller 1 sends a command to the flow control valve 2 to open it precisely, drawing out a constant flow of purified room temperature compressed air from the outlet pipe 6. This constant flow of purge air enters the regeneration inlet pipe. Since the second end of adsorption tank 1 3 is discharging purified air and adsorption tank 2 4 is in an empty state, the pressure at the second end of adsorption tank 1 3 is much greater than the pressure at the second end of adsorption tank 2 4. The purified air passing through the regeneration inlet pipe will not push open the one-way balance valve 38, but will first push open the one-way balance valve 2 48, entering the adsorption tank 2 4 from the second end of adsorption tank 2 4. After being evenly distributed by the airflow distributor 7 at the second end, it flows sequentially through the CO2 removal layer 10, the deep drying layer 9, and the oil removal layer 8, performing reverse purging regeneration of the adsorbent. The gas carrying the desorbed impurities is discharged from the exhaust branch 2 42 through the exhaust valve 2 46 via the airflow distributor 7 at the first end.

[0027] When the preset time is reached or the differential pressure transmitter 39 detects that the pressure at the first and second ends of the adsorption tank 3 exceeds the set threshold, the controller 1 can issue an alarm and perform a switch, so that the adsorption tank 4 enters the adsorption state and the adsorption tank 3 enters the regeneration state, and so on, to achieve intelligent monitoring and automatic switching.

[0028] This invention enables precise control of the adsorption and regeneration processes, achieving heatless regeneration based on the pressure drop principle. Compared to existing CO2 deep purification devices, it eliminates the need for pre-cooling and heating regeneration, resulting in a simpler structure, lower energy consumption, and lower maintenance costs. It can be applied to dilution-based CO2 continuous emission monitoring systems as their power source.

[0029] This invention has a simple structure. By setting two adsorption tanks that alternately adsorb and regenerate, the adsorbent can be recycled. It can achieve continuous removal of compressed air without frequent replacement of the removal agent. It can also automatically switch the adsorption and regeneration processes of the adsorption tanks. It has low operation and maintenance costs, high and stable removal efficiency, and is suitable for providing a long-term and reliable CO2-free power source for dilution CO2 monitoring systems.

[0030] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0031] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A compressed air removal device, characterized in that: The system includes a controller, a flow control valve, and two adsorption tanks, Adsorption Tank 1 and Adsorption Tank 2, arranged in parallel. Adsorption Tank 1 has an inlet branch and an exhaust branch at its first end, and a purified exhaust branch and a regeneration inlet branch at its second end. Adsorption Tank 2 has an inlet branch and an exhaust branch at its first end, and a purified exhaust branch and a regeneration inlet branch at its second end. Inlet branches 1 and 2 are connected in parallel and both are connected to an intake pipe for air intake. The first and second purified air outlet branches are connected in parallel and are both connected to the air outlet pipe. The air outlet pipe is used to discharge purified air. The first and second regeneration air inlet branches are connected in parallel. The flow control valve is located between the first and second regeneration air inlet branches and is connected to the air outlet pipe. The flow control valve is used to connect the first purified air outlet branch and the second regeneration air inlet branch, or to connect the second purified air outlet branch and the first regeneration air inlet branch. The controller is electrically connected to the flow control valve.

2. The compressed air removal device according to claim 1, characterized in that: An intake valve is provided on the first intake branch, an exhaust valve is provided on the first exhaust branch, an intake valve is provided on the second intake branch, and an exhaust valve is provided on the second exhaust branch.

3. The compressed air removal device according to claim 1, characterized in that: One-way valve 1 is provided on the first purified air outlet branch, and one-way valve 2 is provided on the second purified air outlet branch.

4. The compressed air removal device according to claim 1, characterized in that: One-way balance valve one is provided on the first regeneration air intake branch, and one-way balance valve two is provided on the second regeneration air intake branch.

5. The compressed air removal device according to any one of claims 1-4, characterized in that: A detection pipeline is provided between the first and second ends of the adsorption tank 1, and a differential pressure transmitter is provided on the detection pipeline 1; a detection pipeline is provided between the first and second ends of the adsorption tank 2, and a differential pressure transmitter is provided on the detection pipeline 2; the differential pressure transmitter 1 and the differential pressure transmitter 2 are respectively used to detect the pressure difference change between the first and second ends of the adsorption tank 1 and the adsorption tank 2, and both the differential pressure transmitter 1 and the differential pressure transmitter 2 are electrically connected to the controller.

6. The compressed air removal device according to claim 1, characterized in that: Both the first and second ends of the adsorption tank 1 and the adsorption tank 2 are equipped with airflow distributors.

7. The compressed air removal device according to claim 1, characterized in that: Along the direction from the first end to the second end, both adsorption tank one and adsorption tank two are provided with an oil removal layer, a deep drying layer and a CO2 removal layer arranged in sequence inside.

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