Circulating oxygen generation system with double-cavity adsorption tower

Abstract

The invention relates to the technical field of oxygen generation, in particular to a double-cavity adsorption tower circulation type oxygen generation system which comprises an air compressor assembly, the air compressor assembly is connected with a first air inlet pipe and a second air inlet pipe which are connected in parallel through air outlet pipes, an air treatment unit is connected between the first air inlet pipe and the second air inlet pipe, and the air treatment unit is connected with an oxygen outlet pipeline. A flow plug, an oxygen storage tank, a pressure reducing valve, a bacterial filter, an oxygen concentration sensor, a one-way valve, a flow meter and a humidifying cup are sequentially connected to the oxygen outlet pipeline; the air treatment unit comprises a first double-cavity adsorption tower and a second double-cavity adsorption tower, each of the first double-cavity adsorption tower and the second double-cavity adsorption tower comprises two cavities with one ends communicated with each other, the double-cavity adsorption towers are adopted for alternately performing oxygen adsorption and desorption, and continuity and high efficiency of oxygen production are achieved in combination with a specifically arranged electromagnetic valve and an exhaust structure.

Description

Technical Field

[0001] The invention relates to the technical field of oxygen production, in particular to a double-cavity adsorption tower circulating oxygen production system. Background Art

[0002] The oxygen generator uses power as power, air as raw material, molecular sieve as adsorbent, and the principle of pressure swing adsorption separation (PSA) to directly separate oxygen and nitrogen in the air at room temperature to produce oxygen-enriched air with an oxygen concentration of ≥90% (V / V). The commonly used oxygen production system currently uses a pair of single-chamber adsorption tower structures. Each adsorption tower is designed with interfaces at both ends to allow gas in and out. This pair of adsorption towers can be placed separately or integrated together. Generally, an air compressor is designed to provide high-pressure gas. By controlling a dedicated oxygen production solenoid valve, the gas path is switched, so that a pair of adsorption towers are in two states of adsorption and desorption, and cyclically switch between the two states, thereby achieving the purpose of stable oxygen production. At present, the core of this technology is to ensure that each adsorption tower has completed sufficient desorption before the adsorption action. However, since the current adsorption tower only has a single inlet and outlet, its adsorption and desorption gas paths are the same, and there may be insufficient desorption. Summary of the invention

[0003] In order to solve the above technical problems, the present invention specifically adopts the following technical solutions.

[0004] A double-chamber adsorption tower circulating oxygen production system is designed, comprising an air compressor assembly, wherein the air compressor assembly is respectively connected to two parallel air inlet pipes 1 and 2 through an air outlet pipe, and an air inlet solenoid valve 1 and an air inlet solenoid valve 2 are respectively provided on the air inlet pipe 1 and the air inlet pipe 2, an air handling unit is connected between the air inlet pipe 1 and the air inlet pipe 2, the air handling unit is connected to an oxygen outlet pipeline, and a flow resistor, an oxygen storage tank, a pressure reducing valve, a bacterial filter, an oxygen concentration sensor, a one-way valve, a flow meter, and a humidification cup are sequentially connected to the oxygen outlet pipeline;

[0005] The air handling unit comprises a double-chamber adsorption tower 1 and a double-chamber adsorption tower 2, wherein the double-chamber adsorption tower 1 comprises a chamber 1 and a chamber 2 which are interconnected at one end, and an exhaust pipe 1 is connected to the end where the chamber 1 and the chamber 2 are interconnected, and the double-chamber adsorption tower 2 comprises a chamber 3 and a chamber 4 which are interconnected at one end, and an exhaust pipe 2 is connected to the end where the chamber 3 and the chamber 4 are interconnected, and an exhaust solenoid valve 1 and an exhaust solenoid valve 2 are respectively provided on the exhaust pipe 1 and the exhaust pipe 2, and nitrogen exhaust silencers are connected at the outlets of the exhaust pipe 1 and the exhaust pipe 2, and a nitrogen exhaust silencer is connected at the outlets of the chamber 1 and the chamber 2. A U-shaped pipe 1 is connected between the connecting ports at the other end of chamber 2, a U-shaped pipe 2 is connected between the connecting ports at the other ends of chamber 3 and chamber 4, the air inlet pipe 1 and the air inlet pipe 2 are respectively connected to the corresponding U-shaped pipe 1 and U-shaped pipe 2, a connecting pipe is connected between the U-shaped pipe 1 connected to chamber 2 and the U-shaped pipe 2 connected to chamber 4, a gas processing solenoid valve 1 is provided on the U-shaped pipe 1 between the air inlet pipe 1 and the connecting pipe, a gas processing solenoid valve 2 is provided on the U-shaped pipe 2 between the air inlet pipe 2 and the connecting pipe, and the connecting pipe is connected to the oxygen outlet pipeline.

[0006] Preferably, the air compressor assembly includes a base plate, an air compressor body arranged on the base plate, a sound insulation cover mounted on the outside of the air compressor body, a heat dissipation fan arranged inside the air compressor body, and an air intake muffler arranged on the base plate. The air intake muffler is arranged closely to the air compressor body, and an air inlet is provided on the air intake muffler. The muffler, the air compressor body, and the air outlet pipe are connected in sequence along the air flow direction.

[0007] Preferably, quick-connect connectors are provided at the connecting ports on the double-chamber adsorption tower 1 and the double-chamber adsorption tower 2.

[0008] Preferably, the two chambers of the double-chamber adsorption tower 1 and the double-chamber adsorption tower 2 are respectively filled with molecular sieves.

[0009] Preferably, the double-chamber adsorption tower one and the double-chamber adsorption tower two are arranged side by side, and the oxygen storage tank and the bacterial filter are respectively located above the two adjacent chambers of the double-chamber adsorption tower one and the double-chamber adsorption tower two, and are arranged close to the connecting pipe; the one-way valve is located above the double-chamber adsorption tower two, the flow meter and the humidification cup are both arranged on one side of the double-chamber adsorption tower, and the nitrogen exhaust muffler is located above the double-chamber adsorption tower two, and is arranged close to the exhaust solenoid valve one and the exhaust solenoid valve two.

[0010] The beneficial effects of the present invention are:

[0011] 1. The present invention adopts the switching operation of six solenoid valves on the pipeline and the "dual-chamber circulating adsorption-analysis oxygen production system" in the two double-chamber adsorption towers in the first stage. Through the cyclic alternating working mode of the double-chamber adsorption tower, continuous oxygen production is achieved, and the utilization rate of the molecular sieve is optimized, ensuring better contact between air and the molecular sieve, thereby achieving better adsorption and nitrogen removal effects, and further optimizing the adsorption and desorption efficiency of the adsorption tower, thereby improving the utilization rate of the molecular sieve and achieving cost reduction and efficiency improvement.

[0012] 2. The present invention uses a compact dual-chamber side-by-side adsorption tower structure and an oxygen production equipment with optimized pipeline layout, so that the system can fully save space and shorten the path of the airflow pipeline, and provide a dual-chamber adsorption oxygen purification and distribution system with branch adjustment and recycling, so that the solenoid valves on each pipeline can flexibly adjust the oxygen flow path and the molecular sieve can be efficiently recycled, thereby achieving the purpose of high-efficiency oxygen production. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the structure of the present invention;

[0014] Figure 2 It is a schematic diagram of the overall structure of the double-cavity adsorption tower 1 in the present invention;

[0015] Figure 3 It is a schematic diagram of the internal structure of the double-chamber adsorption tower 1;

[0016] Figure 4 It is a working principle diagram of the present invention;

[0017] Figure 5 It is a schematic diagram of the double-chamber adsorption tower 1 for adsorption and the double-chamber adsorption tower 2 for analysis;

[0018] Figure 6 It is a schematic diagram of the adsorption state of the double chamber adsorption tower 2 and the desorption state of the double chamber adsorption tower 1;

[0019] The numbers in the figure are: 1 soundproof cover, 2 cooling fan, 3 air intake silencer, 4 air outlet pipe, 5 air intake solenoid valve 1, 6 gas treatment solenoid valve 1, 7 exhaust solenoid valve 1, 8 air intake solenoid valve 2, 9 gas treatment solenoid valve 2, 10 exhaust solenoid valve 2, 11 oxygen storage tank, 12 bacteria filter, 13 one-way valve, 14 humidification cup, 15 flow meter, 16 nitrogen exhaust silencer, 17 connecting pipe, 18 oxygen outlet pipeline, 19 double-chamber adsorption tower 2, 191 chamber 3, 192 chamber 4, 20 double-chamber adsorption tower 1, 201 chamber 1, 202 chamber 2, 203 tightening spring, 21 quick plug connector, 22 air intake pipe 1, 23 air intake pipe 2, 24 U-shaped pipe 1, 25 U-shaped pipe 2, 26 exhaust pipe 1, 27 exhaust pipe 2. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0021] Example 1

[0022] A double-chamber adsorption tower circulating oxygen production system, such as Figures 1 to 6 As shown, it includes an air compressor assembly, which includes a base plate, an air compressor body arranged on the base plate, a sound insulation cover 1 mounted on the outside of the air compressor body, a heat dissipation fan 2 arranged inside the air compressor body, and an air intake muffler 3 arranged on the base plate. The air intake muffler 3 is arranged closely to the air compressor body, and an air inlet is arranged on the air intake muffler 3. The muffler, the air compressor body, and the air outlet pipe 4 are connected in sequence along the air flow direction. The air compressor assembly is connected to two parallel intake pipes 1 22 and 23 through the outlet pipe 4, and the intake solenoid valve 1 5 and the intake solenoid valve 2 8 are respectively provided on the intake pipe 1 22 and the intake pipe 2 23, and an air handling unit is connected between the intake pipe 1 22 and the intake pipe 2 23, and the air handling unit is connected to the oxygen outlet pipeline 18, and the oxygen outlet pipeline 18 is sequentially connected with a baffle, an oxygen storage tank 11, a pressure reducing valve, a bacterial filter 12, an oxygen concentration sensor, a one-way valve 13, a flow meter 15, and a humidification cup 14;

[0023] The air handling unit includes a double-chamber adsorption tower 1 20 and a double-chamber adsorption tower 2 19 arranged side by side, the double-chamber adsorption tower 1 20 includes a chamber 1 201 and a chamber 2 202 connected at one end, and an exhaust pipe 1 26 is connected to the end where the chamber 1 201 and the chamber 2 202 are connected, the double-chamber adsorption tower 2 19 includes a chamber 3 191 and a chamber 4 192 connected at one end, and an exhaust pipe 2 27 is connected to the end where the chamber 3 191 and the chamber 4 192 are connected to each other, and an exhaust solenoid valve 1 7 and an exhaust solenoid valve 2 10 are respectively provided on the exhaust pipe 1 26 and the exhaust pipe 2 27, and the outlets of the exhaust pipe 1 26 and the exhaust pipe 2 27 are both connected to a nitrogen exhaust silencer 16; between the chamber 1 201 and the chamber 2 A U-shaped pipe 1 24 is connected between the connecting ports at the other end of chamber 2 202, a U-shaped pipe 2 25 is connected between the connecting ports at the other ends of chamber 3 191 and chamber 4 192, an air inlet pipe 1 22 and an air inlet pipe 2 23 are respectively connected to the corresponding U-shaped pipe 1 24 and U-shaped pipe 2 25, a connecting pipe 17 is connected between the U-shaped pipe 1 24 connected to chamber 2 202 and the U-shaped pipe 2 25 connected to chamber 4 192, a gas processing solenoid valve 1 6 is provided on the U-shaped pipe 1 24 between the air inlet pipe 1 22 and the connecting pipe 17, a gas processing solenoid valve 2 9 is provided on the U-shaped pipe 2 25 between the air inlet pipe 23 and the connecting pipe 17, and the connecting pipe 17 is connected to the oxygen outlet pipeline 18.

[0024] When the double-chamber adsorption tower 120 is in the adsorption state and the double-chamber adsorption tower 219 is in the decomposition state, the working mode is as follows: the air intake solenoid valve 15, the gas processing solenoid valve 29, and the exhaust solenoid valve 210 are powered on and opened, and the air intake solenoid valve 28, the gas processing solenoid valve 16, and the exhaust solenoid valve 17 are powered off and closed. At this time, the gas output from the air compressor body passes through the outlet pipe 4, the air intake pipe 122, the U-shaped pipe 124 connected to the chamber 1 201, the chamber 1 201, the chamber 2 202, and the U-shaped pipe 124 connected to the chamber 2 202 in sequence. At this time, the flow The gas discharged is pure oxygen after being adsorbed by the molecular sieve. The pure oxygen gas is divided into two by a three-way pipe. One path outputs oxygen through the oxygen outlet pipeline 18, and the other path is further divided into two paths, one of which passes through the chamber four 192, and the other passes through the gas treatment solenoid valve two 9 and enters the chamber three 191. The mixed gas (which contains a large amount of nitrogen) discharged by the chamber three 191 and the chamber four 192 is simultaneously analyzed and transported to the nitrogen exhaust silencer 16 through the exhaust pipe two 27 for silencing and then discharged. At this time, the adsorption process of the double-chamber adsorption tower one 20 and the analysis process of the double-chamber adsorption tower two 19 are completed;

[0025] When the double-chamber adsorption tower 1 20 is in the analysis state and the double-chamber adsorption tower 2 19 is in the adsorption state, the working mode is:

[0026] The air intake solenoid valve 28, the gas processing solenoid valve 16, and the exhaust solenoid valve 17 are powered on and opened, and the air intake solenoid valve 15, the gas processing solenoid valve 29, and the exhaust solenoid valve 210 are powered off and closed. At this time, the gas output from the air compressor body passes through the outlet pipe 4, the air intake pipe 23, the U-shaped pipe 25 connected to the chamber 3 191, the chamber 3 191, the chamber 4 192, and the U-shaped pipe 25 connected to the chamber 3 191 in sequence. At this time, the pure oxygen gas adsorbed by the molecular sieve is divided into two through the three-way pipe. One way is to output oxygen through the oxygen outlet pipe 18, and the other way is divided into two ways, one of which passes through the chamber 2 202. The other path enters chamber 1 201 after passing through gas treatment solenoid valve 1 6, and the mixed gas (which contains a large amount of nitrogen) discharged after being analyzed simultaneously by chamber 1 201 and chamber 2 202 is transported to nitrogen exhaust silencer 16 through exhaust pipe 1 26 for silencing and then discharged. At this time, the analysis process of double-chamber adsorption tower 1 20 and adsorption process of double-chamber adsorption tower 2 19 is completed; after the solenoid valve state is switched, the above process is repeated and circulated alternately, so that the double-chamber adsorption tower 1 20 and the double-chamber adsorption tower 2 19 can work alternately in the adsorption and analysis states, thereby optimizing the adsorption and analysis efficiency of the adsorption tower, and then improving the utilization rate of the molecular sieve, achieving cost reduction and efficiency improvement.

[0027] Furthermore, quick-connect connectors 21 are provided at the connecting ports on the double-chamber adsorption tower 1 20 and the double-chamber adsorption tower 2 19, which are convenient for quick connection with the two U-shaped pipes and the exhaust pipe respectively; the air intake solenoid valve 1 5, the air intake solenoid valve 2 8, the gas treatment solenoid valve 1 6, the gas treatment solenoid valve 2 9, the exhaust solenoid valve 1 7, and the exhaust solenoid valve 2 10 are all two-position three-way normally closed solenoid valves.

[0028] Furthermore, the two chambers of the double-chamber adsorption tower 1 20 and the double-chamber adsorption tower 2 19 are respectively filled with molecular sieves, and a clamping spring 203 is connected to one end of the molecular sieve, and the other end of the clamping spring 203 is abutted against the inner wall of one end of the chamber. The clamping spring 203 is used to clamp the molecular sieve in the chamber.

[0029] Furthermore, in order to optimize the pipeline design, shorten the pipeline, and reduce the occupied space of the system, the double-chamber adsorption tower 20 and the double-chamber adsorption tower 19 are arranged side by side, and the oxygen storage tank 11 and the bacterial filter 12 are respectively located above the two adjacent chambers of the double-chamber adsorption tower 20 and the double-chamber adsorption tower 19, and are arranged near the connecting pipe 17; the one-way valve 13 is located above the double-chamber adsorption tower 19, the flow meter 15 and the humidification cup 14 are both arranged on one side of the double-chamber adsorption tower, and the nitrogen exhaust muffler 16 is located above the double-chamber adsorption tower 19, and is arranged near the exhaust solenoid valve 17 and the exhaust solenoid valve 2 10.

[0030] In the present invention, the structures of the double-chamber adsorption tower 1 20 and the double-chamber adsorption tower 2 19 are the same. When one of the double-chamber adsorption towers is adsorbing, the gas flows through the two chambers in sequence, and the gas flow path is the effective adsorption height of the two chambers, so that the air and the molecular sieve can be better contacted and the adsorption effect can be improved; at the same time, when the other double-chamber adsorption tower is desorbing, the gas flows through the two chambers at the same time and flows out from one end connected to the two chambers. At this time, the gas flow path is equivalent to half of the gas path during adsorption, and its resistance is smaller, and the nitrogen removal effect is also better.

[0031] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-chamber adsorption tower circulating oxygen production system, characterized in that: It comprises an air compressor assembly, wherein the air compressor assembly is respectively connected to two parallel air intake pipes 1 and 2 through an air outlet pipe, and an air intake solenoid valve 1 and an air intake solenoid valve 2 are respectively provided on the air intake pipe 1 and the air intake pipe 2, an air handling unit is connected between the air intake pipe 1 and the air intake pipe 2, the air handling unit is connected to an oxygen outlet pipeline, and a flow resistor, an oxygen storage tank, a pressure reducing valve, a bacterial filter, an oxygen concentration sensor, a one-way valve, a flow meter, and a humidification cup are sequentially connected to the oxygen outlet pipeline; The air handling unit comprises a double-chamber adsorption tower 1 and a double-chamber adsorption tower 2, wherein the double-chamber adsorption tower 1 comprises a chamber 1 and a chamber 2 which are connected at one end, and an exhaust pipe 1 is connected to the end where the chamber 1 and the chamber 2 are connected, and the double-chamber adsorption tower 2 comprises a chamber 3 and a chamber 4 which are connected at one end, and an exhaust pipe 2 is connected to the end where the chamber 3 and the chamber 4 are connected, and an exhaust solenoid valve 1 and an exhaust solenoid valve 2 are respectively provided on the exhaust pipe 1 and the exhaust pipe 2, and nitrogen exhaust silencers are connected at the outlets of the exhaust pipe 1 and the exhaust pipe 2, and a nitrogen exhaust silencer is connected at the outlets of the chamber 1 and the chamber 2. A U-shaped pipe 1 is connected between the connecting ports at the other ends of chamber 3 and chamber 4, a U-shaped pipe 2 is connected between the connecting ports at the other ends of chamber 3 and chamber 4, the air inlet pipe 1 and the air inlet pipe 2 are respectively connected to the corresponding U-shaped pipe 1 and U-shaped pipe 2, a connecting pipe is connected between the U-shaped pipe 1 connected to chamber 2 and the U-shaped pipe 2 connected to chamber 4, a gas processing solenoid valve 1 is provided on the U-shaped pipe 1 between the air inlet pipe 1 and the connecting pipe, a gas processing solenoid valve 2 is provided on the U-shaped pipe 2 between the air inlet pipe 2 and the connecting pipe, and the connecting pipe is connected to the oxygen outlet pipeline.

2. The double-chamber adsorption tower circulating oxygen production system according to claim 1, characterized in that: The air compressor assembly includes a base plate, an air compressor body arranged on the base plate, a sound insulation cover mounted on the outside of the air compressor body, a heat dissipation fan arranged inside the air compressor body, and an air intake muffler arranged on the base plate. The air intake muffler is arranged closely to the air compressor body, and an air inlet is arranged on the air intake muffler. The muffler, the air compressor body, and the air outlet pipe are connected in sequence along the air flow direction.

3. The double-chamber adsorption tower circulating oxygen production system according to claim 1, characterized in that: The communicating ports on the double-cavity adsorption tower 1 and the double-cavity adsorption tower 2 are provided with quick-insertion connectors.

4. The double-chamber adsorption tower circulating oxygen production system according to claim 1, characterized in that: The two chambers of the double-chamber adsorption tower 1 and the double-chamber adsorption tower 2 are respectively filled with molecular sieves.

5. The double-chamber adsorption tower circulating oxygen production system according to claim 1, characterized in that: The double-chamber adsorption tower one and the double-chamber adsorption tower two are arranged side by side, and the oxygen storage tank and the bacterial filter are respectively located above the two adjacent chambers of the double-chamber adsorption tower one and the double-chamber adsorption tower two, and are arranged close to the connecting pipe; the one-way valve is located above the double-chamber adsorption tower one, the flow meter and the humidification cup are both arranged on one side of the double-chamber adsorption tower one, and the nitrogen exhaust muffler is located above the double-chamber adsorption tower and is arranged close to the exhaust solenoid valve one and the exhaust solenoid valve two.

Images