Directly-heated molecular sieve adsorber

Abstract

The directly-heated molecular sieve adsorber comprises a molecular sieve adsorber body and an electric heater, a molecular sieve air inlet is formed in the top of the molecular sieve adsorber body, a nitrogen outlet and a scrabbling outlet are formed in the bottom of the molecular sieve adsorber body, and the electric heater is arranged at the molecular sieve air inlet. The outer wall of the electric heater and the edge of the molecular sieve air inlet are sealed, a communication port and a heating outlet are formed in the electric heater, the heating outlet is located in the molecular sieve adsorber body, and the communication port is located outside the molecular sieve adsorber body. The electric heater is directly designed at the molecular sieve gas inlet of the molecular sieve adsorber, and during regeneration, hot waste nitrogen is heated by the electric heater and directly enters the molecular sieve adsorber instead of being conveyed through a pipeline, so that the temperature drop caused in the pipeline conveying process is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of molecular sieve adsorbers, and in particular to a direct-heated molecular sieve adsorber. Background Art

[0002] Molecular sieve adsorbers are widely used in air separation and purification industries, mainly for removing impurities such as carbon dioxide, acetylene, and water from the air. The working process of the molecular sieve adsorber in the prior art is divided into two stages: adsorption and regeneration. When the adsorber works normally, the airflow enters from the adsorber inlet, passes through the adsorbent bed and flows out from the adsorber outlet. The regeneration process is opposite to the adsorption process. The regeneration gas enters the adsorber from the regeneration inlet, passes through the adsorption bed and flows out from the regeneration outlet.

[0003] The hot gas has to pass through a section of pipe before entering the molecular sieve adsorber, which will cause the temperature entering the molecular sieve adsorber to drop. In addition, the heating is not continuous, and the pipes are alternately hot and cold, subject to alternating stress. Summary of the invention

[0004] The purpose of the present application is to provide a direct-heated molecular sieve adsorber in order to solve the above-mentioned problem. The heater is directly designed at the molecular sieve air inlet of the molecular sieve adsorber. During regeneration, the hot polluted nitrogen is heated and no longer transported through a pipeline, but directly enters the molecular sieve adsorber, thereby avoiding the temperature drop caused by the pipeline transportation process.

[0005] This application achieves the above objectives through the following technical solutions:

[0006] A directly heated molecular sieve adsorber comprises a molecular sieve adsorber body and an electric heater. A molecular sieve air inlet is arranged on the top of the molecular sieve adsorber body, a nitrogen outlet and a drain outlet are arranged on the bottom of the molecular sieve adsorber body, the electric heater is arranged at the molecular sieve air inlet, and the outer wall of the electric heater is sealed to the edge of the molecular sieve air inlet. A connecting port and a heating outlet are arranged on the electric heater, and the heating outlet is located inside the molecular sieve adsorber body, and the connecting port is located outside the molecular sieve adsorber body.

[0007] Preferably, it also includes a nitrogen delivery pipeline, a flow rate sensor, a first temperature sensor, a second temperature sensor and a controller, one end of the nitrogen delivery pipeline is connected to the connecting port, the nitrogen delivery pipeline is provided with a flow rate sensor and a first temperature sensor for detecting the temperature and flow rate respectively, the electric heater is provided with a second temperature sensor near the heating outlet, and the flow rate sensor, the first temperature sensor and the second temperature sensor are connected to the controller by wires.

[0008] Preferably, an air pump is also included, which is connected to the nitrogen delivery pipeline to extract the contaminated nitrogen and deliver it into the electric heater.

[0009] Preferably, the outlet is arranged on the side near the bottom of the molecular sieve adsorber body, and the nitrogen outlet is arranged below the bottom of the molecular sieve adsorber body.

[0010] Preferably, a portion of the electric heater extends into the molecular sieve adsorber body.

[0011] Compared with the prior art, the present application designs the electric heater directly at the molecular sieve air inlet of the molecular sieve adsorber. During regeneration, the hot polluted nitrogen is heated by the electric heater and no longer transported through pipelines, but directly enters the molecular sieve adsorber, avoiding the temperature drop caused by pipeline transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings are used to provide a further understanding of the present application and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present application but do not constitute a limitation to the present application. In the accompanying drawings:

[0013] Figure 1 It is a schematic diagram of the structure of this application.

[0014] The following are the descriptions of the reference numerals:

[0015] 1. Molecular sieve adsorber body; 2. Electric heater; 3. Nitrogen delivery pipeline; 4. Heating outlet; 5. Nitrogen outlet; 6. Drain outlet; 7. Flow rate sensor; 8. First temperature sensor; 9. Second temperature sensor; 10. Air pump; 11. Molecular sieve air inlet; 12. Controller; 13. Connecting port. DETAILED DESCRIPTION

[0016] The technical solutions 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, rather than all of the embodiments.

[0017] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the attached Figure 1 , and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application.

[0018] like Figure 1As shown, a direct-heated molecular sieve adsorber includes a molecular sieve adsorber body 1 and an electric heater 2. A molecular sieve air inlet 11 is arranged on the top of the molecular sieve adsorber body 1, a nitrogen outlet 5 and a heating outlet 6 are arranged on the bottom of the molecular sieve adsorber body 1, the electric heater 2 is arranged at the molecular sieve air inlet 11, and the outer wall of the electric heater 2 is sealed to the edge of the molecular sieve air inlet 11, a connecting port 13 and a heating outlet 4 are arranged on the electric heater 2, and the heating outlet 4 is located inside the molecular sieve adsorber body 1, and the connecting port 13 is located outside the molecular sieve adsorber body 1.

[0019] Specifically, the molecular sieve air inlet 11 is installed on the inner side of the electric heater 2 and is sealed to avoid air leakage. At the same time, the nitrogen entering the electric heater 2 from the connecting port 13 can enter the molecular sieve adsorber body 1 directly from the heating outlet 4 after being heated by the electric heater 2, thereby avoiding the temperature drop caused by pipeline transportation.

[0020] Preferably, it also includes a nitrogen delivery pipeline 3, a flow rate sensor 7, a first temperature sensor 8, a second temperature sensor 9 and a controller 12, one end of the nitrogen delivery pipeline 3 is connected to the connecting port 13, the nitrogen delivery pipeline 3 is provided with a flow rate sensor 7 and a first temperature sensor 8 for detecting the temperature and the flow rate respectively, the electric heater 2 is provided with a second temperature sensor 9 near the heating outlet 4, and the flow rate sensor 7, the first temperature sensor 8 and the second temperature sensor 9 are connected to the controller 12 by wires.

[0021] Specifically, the controller 12 controls the electric heater 2, the other end of the nitrogen delivery pipe 3 is connected to the source of the contaminated nitrogen gas for delivering nitrogen to the electric heater 2, the flow rate sensor 7 detects the nitrogen flow rate, the first temperature sensor 8 and the second temperature sensor 9 detect the temperature of the nitrogen, and the controller 12 controls the power of the electric heater 2 according to the flow rate and temperature to adjust the heating temperature.

[0022] Preferably, an air pump 10 is further included, and the air pump 10 is connected to the nitrogen delivery pipeline 3 to extract the contaminated nitrogen and deliver it into the electric heater 2.

[0023] Specifically, starting the air pump 10 can extract nitrogen and send it into the electric heater 2 to ensure stable delivery of nitrogen.

[0024] Preferably, the drain outlet 6 is arranged on the side near the bottom of the molecular sieve adsorber body 1 , and the nitrogen outlet 5 is arranged below the bottom of the molecular sieve adsorber body 1 .

[0025] Specifically, the contaminated nitrogen gas treated by the molecular sieve adsorber body 1 is discharged from the nitrogen outlet 5 .

[0026] Preferably, a portion of the electric heater 2 extends into the molecular sieve adsorber body 1 , and an outer surface of the electric heater 2 is connected to the molecular sieve air inlet 11 .

[0027] Specifically, the nitrogen heated by the electric heater 2 is directly transported into the molecular sieve adsorber body 1 without being transported through a pipeline.

[0028] In the above structure, the contaminated nitrogen enters the electric heater 2 from the nitrogen delivery pipe 3. If it is necessary to speed up the flow rate of the nitrogen, start the air pump 10 to extract the nitrogen and send it into the electric heater 2. Then, the contaminated nitrogen is heated by the electric heater 2 and directly discharged from the heating outlet 4 into the molecular sieve adsorber body 1. The flow rate sensor 7 detects the flow rate of the nitrogen and outputs the parameters to the controller 12. When the flow rate is accelerated, the controller 12 controls the electric heater 2 to increase the power and increase the heating temperature to ensure the heating effect. At the same time, the first temperature sensor 8 and the second temperature sensor 9 respectively detect the temperature of the contaminated nitrogen before entering the electric heater 2 and the temperature after being discharged from the electric heater 2, and output the temperature parameters to the controller 12. The controller 12 controls the electric heater 2 to adjust the heating temperature by analyzing the parameters of the first temperature sensor 8 and the second temperature sensor 9 to ensure the stability of the temperature of the heated contaminated nitrogen.

[0029] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present application. Without departing from the spirit and scope of the present application, the present application may have various changes and improvements, which fall within the scope of the present application to be protected. The scope of protection claimed in the present application is defined by the attached claims and their equivalents.

Claims

1. A directly heated molecular sieve adsorber, characterized in that: The invention comprises a molecular sieve adsorber body (1) and an electric heater (2); the top of the molecular sieve adsorber body (1) is provided with a molecular sieve air inlet (11); the bottom of the molecular sieve adsorber body (1) is provided with a nitrogen outlet (5) and a drain outlet (6); the electric heater (2) is arranged at the molecular sieve air inlet (11); the outer wall of the electric heater (2) is sealed to the edge of the molecular sieve air inlet (11); the electric heater (2) is provided with a connecting port (13) and a heating outlet (4); the heating outlet (4) is located inside the molecular sieve adsorber body (1) and the connecting port (13) is located outside the molecular sieve adsorber body (1).

2. A directly heated molecular sieve adsorber according to claim 1, characterized in that: The apparatus further comprises a nitrogen delivery pipeline (3), a flow rate sensor (7), a first temperature sensor (8), a second temperature sensor (9) and a controller (12); one end of the nitrogen delivery pipeline (3) is connected to the connecting port (13); the nitrogen delivery pipeline (3) is provided with a flow rate sensor (7) and a first temperature sensor (8) for detecting temperature and flow rate respectively; the electric heater (2) is provided with a second temperature sensor (9) near the heating outlet (4); and the flow rate sensor (7), the first temperature sensor (8) and the second temperature sensor (9) are connected to the controller (12) by electric wires.

3. A directly heated molecular sieve adsorber according to claim 2, characterized in that: It also includes an air pump (10), which is connected to the nitrogen delivery pipeline (3) and is used to extract contaminated nitrogen and deliver it into the electric heater (2).

4. The directly heated molecular sieve adsorber according to claim 1, characterized in that: The outlet (6) is arranged on a side surface near the bottom of the molecular sieve adsorber body (1), and the nitrogen outlet (5) is arranged below the bottom of the molecular sieve adsorber body (1).

5. The directly heated molecular sieve adsorber according to claim 1, characterized in that: A portion of the electric heater (2) extends into the molecular sieve adsorber body (1).

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