CN217410271U

CN217410271U - Intelligent molecular sieve oxygen generation system suitable for low-pressure environment

Info

Publication number: CN217410271U
Application number: CN202220825923.0U
Authority: CN
Inventors: 楼百根
Original assignee: Hangzhou Chuangwei Industrial Co ltd
Current assignee: Hangzhou Chuangwei Industrial Co ltd
Priority date: 2022-04-11
Filing date: 2022-04-11
Publication date: 2022-09-13
Anticipated expiration: 2032-04-11

Abstract

The utility model discloses an intelligent molecular sieve system oxygen system that is fit for low pressure environment, air compressor unit and air buffer tank including the pipe connection, two sets of oxygenerator and the oxygen buffer tank of pipe connection respectively, pipe connection's pressure unit and high-pressure buffer tank, the air buffer tank respectively with two oxygenerator pipe connections, oxygen buffer tank and pressure unit pipe connection, still including setting up the pressure sensor on high-pressure buffer tank, the PLC treater, mutual interface, control terminal, PLC treater and air compressor, the oxygenerator, the booster compressor, pressure sensor, mutual interface signal connection, control terminal passes through the network module and is connected with the PLC treater. According to the pressure change condition in the high-pressure buffer tank, the molecular sieve oxygen generation system is intelligently controlled to start and stop, the pressure fluctuation of the output end is reduced, and the system is suitable for low-pressure extreme environments; adopt multiunit oxygenerator parallel work, open as required and stop, prevent the potential safety hazard that continuous long-time work caused.

Description

Intelligent molecular sieve oxygen generation system suitable for low-pressure environment

Technical Field

The utility model belongs to the technical field of the gas separation technique and specifically relates to an intelligent molecular sieve system oxygen system who is fit for low pressure environment is related to.

Background

In recent years, molecular sieve oxygen generation systems have been developed rapidly, and miniaturized molecular sieve oxygen generators have been widely used for home oxygen therapy. The molecular sieve oxygen generator is an oxygen generator which uses pressure swing adsorption to separate oxygen from air, and generally uses a compressor to compress air, then the compressed air is passed through a scavenging valve and fed into an adsorption tower in which the molecular sieve is mounted, and the oxygen is cyclically produced by means of adsorption and desorption. Especially in the extreme environment of low pressure such as plateau, the air is thin, oxygen is less, and human normal breathing is greatly influenced, so the oxygen generator is especially needed to assist the production and life of human.

However, in extreme environments, the operation of an oxygen generator is also greatly limited by the environment. The existing molecular sieve oxygen generator used on the plateau is difficult to adapt to pressure change in a low-pressure environment due to the fact that the existing molecular sieve oxygen generator relates to the processes of induced air, compression and transmission, obvious fluctuation exists when the existing molecular sieve oxygen generator is used, oxygen cannot be stably output, extra energy needs to be consumed when oxygen is generated, and the requirement cannot be met. Chinese patent publication No. CN209276153U discloses an oxygen generator for high altitude areas, in which a rotor is provided with left and right guide grooves, and two blades are respectively arranged in the two guide grooves; the bottom in the guide groove is provided with a clamping plate, the tail end of each blade is provided with a clamping groove, the clamping plate is inserted into the clamping groove to form a guide fixing structure for the blades, and the inner spaces of the guide grooves on two sides of the clamping plate are mutually isolated; be equipped with the spring in the guide way, the tight guide way bottom in spring one end top, the other end supports the blade end, utilizes the matching of cardboard and draw-in groove, simultaneously with the spring cooperation, avoids blade both sides intercommunication gas leakage, improves the efficiency of compressor. The prior art mainly overcomes some problems in the use of plateau or low-pressure places from the mechanical structure perspective, but does not optimize a controller of a molecular sieve oxygen generation system, and cannot deal with the complex conditions under extreme environments.

Disclosure of Invention

The utility model provides an overcome prior art can't last stable oxygen suppliment, the weak problem of equipment adaptability under extreme environment, provide an intelligent molecular sieve system oxygen system who is fit for the low pressure environment.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an intelligent molecular sieve oxygen generation system suitable for a low-pressure environment comprises a control device, and an air inlet device, an oxygen generation device and a supercharging device which are sequentially connected by pipelines, the air inlet device comprises an air compressor set and an air buffer tank which are connected by pipelines, the oxygen generating device comprises two groups of oxygen generators and oxygen buffer tanks which are respectively connected by pipelines, the supercharging device comprises a supercharging unit and a high-pressure buffer tank which are connected by pipelines, the air buffer tank is respectively connected with the two oxygenerators by pipelines, the oxygen buffer tank is connected with a booster set pipeline, the control device comprises a pressure sensor, a PLC processor, an interactive interface and a control terminal which are arranged on the high-pressure buffer tank, the PLC processor is connected with the air compressor, the oxygen generator, the supercharger, the pressure sensor and the interactive interface signal, and the control terminal is connected with the PLC processor through the network module.

Because in extreme environments such as plateau, the air is thin, and atmospheric pressure is lower, and atmospheric pressure is easy to exist great fluctuation simultaneously, consequently admits air through the air compressor unit, ensures that sufficient quantity air gets into the device. The air buffer tank is firstly arranged behind the device, so that the phenomenon that the molecular sieve in the oxygen generator generates unnecessary vibration due to the fact that air with too high pressure directly enters the oxygen generator is avoided. After oxygen is prepared in the oxygen generator, the prepared oxygen is buffered and collected by an oxygen buffer tank and then enters a supercharger, and the oxygen is merged and introduced into a high-pressure buffer tank.

Be equipped with pressure sensor on the high pressure buffer tank, pressure sensor feeds back pressure signal to the PLC controller, and PLC controls equipment according to the pressure condition, controls the pressure value of high pressure buffer tank at 0.4~1 MPa. When the pressure value is less than 0.4MPa, controlling the air compressor unit, the two oxygenerators and the booster unit to start to work according to the process flow; when the pressure value is more than 1MPa, controlling the air compressor unit, the two oxygenerators and the booster unit to stop according to the process flow; when the pressure is 0.4 MPa-1 MPa, the air compressor unit, the oxygen generator and the booster unit are controlled to start to work according to the process flow. Meanwhile, when the pressure is 0.4 MPa-1 MPa, the two oxygen generators are set to alternately work, so that the potential safety hazard of the oxygen generators caused by long-time continuous work is reduced.

Meanwhile, the working condition of the equipment is synchronized in two aspects, namely, the working condition is displayed on an interactive interface on one hand, and the working condition is displayed on a control terminal through a network on the other hand. The operator can control the operation on site through an interactive interface and can also operate through a control terminal.

Preferably, the air compressor unit comprises two air compressors, and the booster unit comprises two boosters which are respectively connected with the oxygen buffer tank through pipelines. The air inlet speed is accelerated when the pressure in the high-pressure buffer tank is too low by utilizing the two air compressors, and the two air compressors are utilized to work alternately when the pressure in the high-pressure buffer tank meets the requirement, so that the potential safety hazard is reduced. Two parallel oxygen generation and pressurization circuits are formed in the system by utilizing the two superchargers, and oxygen generation fluctuation caused by air inlet fluctuation is eliminated through alternate work of the two circuits, so that the output end always has stable oxygen supply.

Preferably, a dryer is arranged in front of each oxygen generator, and the PLC processor is connected with the dryer in a control mode. The dryer is used for removing moisture in the air, and the effect of moisture entering on the efficiency of the equipment is prevented.

Preferably, a filter is arranged in front of each oxygen generator. The filter can be used for removing some small-particle dust, impurities and the like in the air, so that the influence of the small-particle dust, the impurities and the like on the molecular sieve of the oxygen generator is avoided.

Preferably, the control terminal comprises an on-site monitoring device and a mobile terminal device. The operation condition of the oxygen generation system can be monitored in real time on site, remote monitoring operation can be realized through the mobile terminal equipment, and the convenience of the equipment is improved.

Preferably, the interactive interface is an HMI human-machine interface.

Preferably, an air inlet valve is arranged between the air compressor and the air buffer tank, and an oxygen outlet valve is arranged on the high-pressure buffer tank. The air inlet and oxygen outlet processes can be integrally controlled.

Therefore, the utility model discloses following beneficial effect has: according to the change condition of the pressure in the high-pressure buffer tank, the control device is adopted to intelligently start and stop the molecular sieve oxygen generation system, so that the pressure fluctuation of the output end is reduced, and the system is suitable for being used in a low-pressure extreme environment; adopt multiunit oxygenerator parallel work, open as required and stop, prevent the potential safety hazard that continuous long-time work caused.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the control device of the present invention.

In the figure: the system comprises an air compressor set 1, an air buffer tank 2, a dryer 3, a filter 4, an oxygen generator 5, an oxygen buffer tank 6, a booster set 7, a high-pressure buffer tank 8, a pressure sensor 9, an air inlet valve 10, an oxygen outlet valve 11, a PLC (programmable logic controller) 12, an interactive interface 13, a network module 14, a field monitoring device 15 and a mobile terminal device 16.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description.

As shown in figure 1, an intelligent molecular sieve oxygen generation system who is fit for low pressure environment, including controlling means and air inlet unit, oxygenerator and supercharging device of pipe connection in proper order, air inlet unit includes air compressor unit 1 and air buffer tank 2, air compressor unit includes two air compressor, two air compressor and air buffer tank pipe connection, oxygenerator includes two sets of oxygenerator 5 and the oxygen buffer tank 6 of pipe connection respectively, supercharging device includes supercharging unit 7 and high-pressure buffer tank 8, supercharging unit includes two superchargers, two superchargers one end respectively with an oxygen buffer tank pipe connection, the other end all with high-pressure buffer tank pipe connection, the air buffer tank respectively with two oxygenerator pipe connections, oxygen buffer tank and supercharging unit pipe connection. A drier 3 is arranged in front of each oxygen generator, and the drier is a cold drier. And a filter 4 is also arranged between each oxygen generator and the dryer, and the filter is a carbon filter tank. An air inlet valve 10 is arranged between the air compressor and the air buffer tank, and an oxygen outlet valve 11 is arranged on the high-pressure buffer tank.

As shown in fig. 2, the control device comprises a pressure sensor 9 arranged on the high-pressure buffer tank, a PLC processor 12, an interactive interface 13 and a control terminal, the PLC processor is in signal connection with the air compressor, the oxygen generator, the supercharger, the pressure sensor and the interactive interface, and the control terminal is connected with the PLC processor through a network module 14. The control terminal comprises a field monitoring device 15 and a mobile terminal device 16. The interactive interface is an HMI human-machine interface.

The utility model discloses in the course of the work, send pressure regulation and control scope to the PLC treater through HMI human-machine interface, generally be 0.4~1.0MPa to the plateau condition, later start-up system opens admission valve, play oxygen valve. Because the pressure in the high-pressure buffer tank can not meet the requirement before starting the machine, the PLC processor automatically starts the air compressor, the refrigerating dryer, the oxygen generator and the supercharger according to the technological process in sequence to work, air is sent into the air buffer tank, then the air enters the oxygen generator after being dried by the refrigerating dryer and filtered by the carbon filter tank, and oxygen is prepared in the oxygen generator by utilizing the pressure swing adsorption of the molecular sieve. The prepared oxygen is accumulated in an oxygen buffer tank and then enters a supercharger, and after sufficient pressure is obtained, the oxygen enters a high-pressure buffer tank through an outlet manifold, and then flows out of an oxygen outlet valve to reach an oxygen using end.

In the working process, the pressure sensor continuously sends pressure data in the high-pressure buffer tank to the PLC processor, and if the pressure data is smaller than the lower limit of a set value, the PLC processor automatically starts all the air compressors, the cold drying machine, the oxygen generator and the supercharger; if the pressure data is larger than the upper limit of the set value, the PLC processor automatically closes all the air compressor, the refrigeration dryer, the oxygen generator and the supercharger; if the pressure data is between the upper limit and the lower limit of the set value, the PLC processor automatically controls one group of air compressor, cold dryer, oxygen generator and supercharger to operate, and switches to another group after a period of time, so as to realize alternate operation. In this way, the system is controlled to stably deliver oxygen to the oxygen terminal all the time, and the fluctuation of oxygen supply caused by the change of external pressure under low pressure or extreme environment is avoided. Meanwhile, the working condition of the equipment is also sent to the field monitoring equipment and the mobile terminal equipment in real time through the network module, so that an operator can visually know the working condition, and each machine can be manually adjusted through the HMI (human machine interface) or the mobile terminal equipment.

Claims

1. The utility model provides an intelligent molecular sieve oxygen generation system that is fit for low pressure environment, characterized by, including controlling means and air inlet unit, oxygenerator and supercharging device of pipe connection in proper order, air inlet unit includes pipe connection's air compressor unit (1) and air buffer tank (2), oxygenerator includes two sets of oxygenerator (5) and oxygen buffer tank (6) of pipe connection respectively, supercharging device includes pipe connection's supercharging unit (7) and high-pressure buffer tank (8), the air buffer tank respectively with two oxygenerator pipe connections, the oxygen buffer tank is connected with the supercharging unit pipe, controlling means is including setting up pressure sensor (9), PLC treater (12), interactive interface (13), control terminal on the high-pressure buffer tank, PLC treater and air compressor, oxygenerator, booster compressor, pressure sensor, The interactive interface is in signal connection, and the control terminal is connected with the PLC through a network module (14).

2. The system of claim 1, wherein the air compressor unit comprises two air compressors, and the booster unit comprises two boosters, wherein the boosters are respectively connected to the oxygen buffer tank by a pipeline.

3. The intelligent molecular sieve oxygen generation system suitable for the low-pressure environment as claimed in claim 1, wherein a dryer (3) is arranged in front of each oxygen generator, and the PLC processor is connected with the dryer.

4. The system as claimed in claim 1, wherein a filter (4) is provided in front of each oxygen generator.

5. The system as claimed in claim 1, wherein the control terminal comprises an on-site monitoring device (15) and a mobile terminal device (16).

6. The system of claim 1, wherein the interactive interface is an HMI human machine interface.

7. The system as claimed in claim 1, wherein an air inlet valve (10) is disposed between the air compressor and the air buffer tank, and an oxygen outlet valve (11) is disposed on the high pressure buffer tank.