阅读说明：本技术 一种离心压缩式变压吸附制氧机 (Centrifugal compression type pressure swing adsorption oxygen generator ) 是由 尹光虎 黄梅 尹辉 韩丰瑞 于 2020-04-13 设计创作，主要内容包括：本发明提出了一种离心压缩式变压吸附制氧机,属于制氧机技术领域。解决了现有制氧机洁净制氧成本高、体积大,不适合全面推广的问题。它包括离心压缩机、中间冷却器、后冷却器、缓冲罐、过滤器和变压吸附塔,所述离心压缩机包括电机、第一叶轮、第二叶轮和悬浮轴承,所述电机两端的输出轴通过悬浮轴承的支撑分别与第一叶轮和第二叶轮直接耦合,所述中间冷却器的两端分别连接第一叶轮的出口端和第二叶轮的入口端,所述第二叶轮的出口端与后冷却器入口端相连,所述后冷却器出口端通过止回阀与缓冲罐相连,所述缓冲罐通过过滤器与变压吸附塔相连,所述离心压缩机、中间冷却器和后冷却器集成在压缩机箱体内。它主要用于制取氧气。(The invention provides a centrifugal compression type pressure swing adsorption oxygen generator, and belongs to the technical field of oxygen generators. Solves the problems of high cost, large volume and unsuitability for comprehensive popularization of the clean oxygen generation of the existing oxygen generator. It includes centrifugal compressor, intercooler, aftercooler, buffer tank, filter and pressure swing adsorption tower, centrifugal compressor includes motor, first impeller, second impeller and suspension bearing, the output shaft at motor both ends passes through the support of suspension bearing respectively with first impeller and second impeller direct coupling, the exit end of first impeller and the entry end of second impeller are connected respectively to the both ends of intercooler, the exit end of second impeller links to each other with the aftercooler entry end, the aftercooler exit end passes through the check valve and links to each other with the buffer tank, the buffer tank passes through the filter and links to each other with the pressure swing adsorption tower, centrifugal compressor, intercooler and aftercooler integration are in the compressor box. It is mainly used for preparing oxygen.)

1. The utility model provides a centrifugal compression pressure swing adsorption oxygenerator which characterized in that: the device comprises a centrifugal compressor, an intercooler (3), a post cooler (4), a buffer tank (16), a filter (17) and a pressure swing adsorption tower (18), wherein the centrifugal compressor comprises a motor (1), a first impeller (2), a second impeller (8) and a suspension bearing (20), output shafts at two ends of the motor (1) are respectively and directly coupled with the first impeller (2) and the second impeller (8) through the support of the suspension bearing (20), two ends of the intercooler (3) are respectively connected with an outlet end of the first impeller (2) and an inlet end of the second impeller (8), an outlet end of the second impeller (8) is connected with an inlet end of the post cooler (4), an outlet end of the post cooler (4) is connected with the buffer tank (16) through a check valve (7), the buffer tank (16) is connected with the pressure swing adsorption tower (18) through the filter (17), the centrifugal compressor, the intercooler (3) and the aftercooler (4) are integrated in a compressor housing (12).

2. The centrifugal compression pressure swing adsorption oxygen plant of claim 1, wherein: the motor (1) is connected with the air cooler (9) through a fan (10).

3. The centrifugal compression pressure swing adsorption oxygen plant of claim 1, wherein: the outlet end of the after cooler (4) is connected with the silencer (5) through an air release regulating valve (6).

4. A centrifugal compression pressure swing adsorption oxygen plant according to claim 3, characterized in that: the pressure swing adsorption tower (18) is provided with an electromagnetic valve (19), and the connecting pipeline is provided with a sensor.

5. The centrifugal compression pressure swing adsorption oxygen plant of claim 4, wherein: the sensor is a pressure sensor, a differential pressure sensor, a flow sensor and/or a temperature sensor.

6. A centrifugal compression pressure swing adsorption oxygen plant according to claim 4 or 5, characterized in that: the device is characterized by further comprising a frequency converter (13) and a controller (14), wherein the frequency converter (13) is connected with the motor (1), and the controller (14) is respectively connected with the frequency converter (13), the buffer tank (16), the filter (17) and the sensor.

7. The centrifugal compression pressure swing adsorption oxygen plant of claim 6, wherein: the controller (14) is connected with the touch screen (15).

8. The centrifugal compression pressure swing adsorption oxygen plant of claim 6, wherein: and the frequency converter (13) is connected with the frequency converter cooling mechanism (11).

9. The centrifugal compression pressure swing adsorption oxygen plant of claim 1, wherein: the centrifugal compressor is one-stage compression or multi-stage compression, and the number of the pressure swing adsorption towers (18) is more than or equal to 2.

10. The centrifugal compression pressure swing adsorption oxygen plant of claim 1, wherein: the suspension bearing (20) is a dynamic pressure air bearing or a magnetic suspension bearing.

Technical Field

The invention belongs to the technical field of oxygen generators, and particularly relates to a centrifugal compression type pressure swing adsorption oxygen generator.

Background

Oxygen is not only a necessary product for rescue treatment in hospitals, but also an important means for improving the immunity of organisms and delaying senility to achieve double functions of treatment and health care. If the high-efficiency oxygen generator which can generate oxygen at low cost and does not influence the surrounding environment is popularized in large hospitals and community health care to realize low-cost oxygen inhalation, the old diseases can be greatly relieved, improved and cured, the traditional single-drug treatment habit can be changed, the medical expenditure is saved, the immunity of the whole people is improved, and great social benefits are generated.

The medical oxygen needs clean oxygen, and the key equipment air compressor in the existing oxygen generator is difficult to produce clean oil-free and low-cost compressed air by the existing means, so that equipment meeting the medical oxygen standard can be produced, and the defects of short service life, low efficiency, large equipment volume, high noise, inconvenience in frequent start and stop and the like exist, so that the existing hospitals are still using liquid oxygen and steel cylinder oxygen which are obviously used are 4-8 times more expensive than oxygen generation. The requirements for the environment such as safe fire fighting by using liquid oxygen are high, and the oxygen supply device needs to be installed in remote places for centralized oxygen supply, which increases a lot of pipeline investment and pipeline pressure loss. Oxygen is used as a gas with abundant air, and is inexhaustible, but oxygen production equipment, operation cost and other reasons keep the oxygen cost of hospitals high.

The traditional oxygen generator mainly comprises an air compressor, a storage tank, an oil remover, a cold dryer, a pressure swing adsorption tower and various filters. Among the major contributors to oxygen production cost, oxygen quality, and environmental factors are air compressors. The piston compressor has the advantage of small capacity, but has the problems of high noise and instability, is not suitable for long-term operation and medical oxygen generation, and is suitable for refrigeration and compression; the screw compressor has the advantages of complete size and capacity, stable output pressure and less equipment maintenance, but the structure of the screw compressor contains oil, the oil removal and filtration loss is large, the noise is large, the service life is short, the abrasion is large, and the material consumption cost is high; the sliding vane compressor has the advantages of simple structure, few parts, convenient maintenance, low noise, small vibration, small volume and light weight, but the mechanical friction of the sliding vane compressor can generate larger energy loss, the efficiency is lower than that of a screw rod by more than 10 percent and is lower than that of a reciprocating piston by more than 20 percent, and the service life is only about 8000 hours.

The traditional centrifugal compressor has the advantages of stable output pressure and no oil, but has the problems of complex start and stop and poor operation adaptability, and is only suitable for large-flow places. The centrifugal compressed air is efficient and stable equipment for producing clean oxygen without contacting with grease. And the centrifugal air compressor is a speed type device that obtains kinetic energy by a high speed centrifugal force. That is, the pressure kinetic energy is proportional to the rotational speed of the centrifuge and the diameter of the impeller. The traditional centrifugal air compressor increases the rotating speed through gear acceleration, but the impeller diameter needs to be increased when the centrifugal air compressor can only provide 10,000rpm or so. The motor capacity required for the transmission is also increased. Therefore, the traditional centrifuge is a device which has large capacity, large equipment and high noise and is inconvenient to frequently start and stop. A traditional centrifugal oxygen generator can supply more than 3 oxygen for the whole hospital, and in cities, combustible oxygen cannot be connected with a plurality of hospitals for a long distance by pipelines.

Disclosure of Invention

The invention provides a centrifugal compression type pressure swing adsorption oxygen generator for solving the problems in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a centrifugal compression formula pressure swing adsorption oxygenerator, it includes centrifugal compressor, intercooler, aftercooler, buffer tank, filter and pressure swing adsorption tower, centrifugal compressor includes motor, first impeller, second impeller and suspension bearing, the output shaft at motor both ends passes through the support of suspension bearing respectively with first impeller and second impeller direct coupling, the exit end of first impeller and the entry end of second impeller are connected respectively to the both ends of intercooler, the exit end of second impeller links to each other with the aftercooler entry end, the aftercooler exit end passes through the check valve and links to each other with the buffer tank, the buffer tank passes through the filter and links to each other with the pressure swing adsorption tower, centrifugal compressor, intercooler and aftercooler integration are in the compressor box.

Further, the motor is connected with the air cooler through a fan.

Furthermore, the outlet end of the after cooler is connected with the silencer through a vent regulating valve.

Furthermore, an electromagnetic valve is arranged on the pressure swing adsorption tower, and a sensor is arranged on the connecting pipeline.

Further, the sensor is a pressure sensor, a differential pressure sensor, a flow sensor and/or a temperature sensor.

Furthermore, the device also comprises a frequency converter and a controller, wherein the frequency converter is connected with the motor, and the controller is respectively connected with the frequency converter, the buffer tank, the filter and the sensor.

Furthermore, the controller is connected with the touch screen.

Further, the frequency converter is connected with a frequency converter cooling mechanism.

Furthermore, the centrifugal compressor is one-stage compression or multi-stage compression, and the number of the pressure swing adsorption towers is more than or equal to 2.

Furthermore, the suspension bearing is a dynamic pressure air bearing or a magnetic suspension bearing.

Compared with the prior art, the invention has the beneficial effects that: the invention solves the problems of high oxygen production cost, large volume and unsuitability for comprehensive popularization of the existing oxygen generator.

The oxygen generator of the invention is used for centrifugal compression oxygen generation, has 100 percent of oil-free and pollution-free performance, and the prepared oxygen exceeds the clean standard of ISO8573-1Class 0. The ultra-high speed centrifugal compression saves gear acceleration, is precise in manufacturing and simple in structure, has higher efficiency by more than 25% compared with the traditional screw compressor, has reduced volume 2/3, saves 3% of pressure loss and 5% of electric power loss for the freeze-drying machine due to the fact that an air storage tank, an air freeze-drying machine and a plurality of precision filters are saved. Because the oxygen generator has no vibration, low noise, no maintenance, small volume, safety and reliability, the oxygen generator can be completely placed in buildings such as outpatient clinics and courtyards, pressure loss of pipeline transportation of a central oxygen generation station is saved, and a liquid oxygen station with large floor area can be utilized more effectively and valuably. Therefore, the cost is lower than that of the traditional oxygen generation by more than 25 percent, the oxygen supply with low cost in large and small hospitals, community health care facilities and nursing homes is met, the senile diseases can be greatly relieved, improved and cured, the traditional single-drug treatment habit is changed, the expenditure is saved, and the immunity of the whole people is improved.

SARS, new coronary pneumonia is a respiratory disease, and the first step in the treatment of new coronary pneumonia is high flow oxygen treatment, which requires a large amount of oxygen. By the application, the oxygen requirement of a new coronary pneumonia patient during isolation can be greatly improved.

Drawings

FIG. 1 is a schematic view of a centrifugal compression type pressure swing adsorption oxygen generator according to the present invention;

FIG. 2 is a schematic view of a centrifugal compressor according to the present invention;

FIG. 3 is a schematic cross-sectional view of a centrifugal compressor according to the present invention;

FIG. 4 is a structural comparison diagram of a centrifugal compression type pressure swing adsorption oxygen generator and a screw compressor type oxygen generator according to the present invention.

1-motor, 2-first impeller, 3-intercooler, 4-aftercooler, 5-silencer, 6-air release regulating valve, 7-check valve, 8-second impeller, 9-air cooler, 10-fan, 11-frequency converter cooling mechanism, 12-compressor box, 13-frequency converter, 14-controller, 15-touch screen, 16-buffer tank, 17-filter, 18-pressure swing adsorption tower, 19-electromagnetic valve, 20-suspension bearing.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely explained below with reference to the drawings in the embodiments of the present invention.

Referring to fig. 1-4 to illustrate the embodiment, a centrifugal compression type pressure swing adsorption oxygen generator comprises a centrifugal compressor, an intercooler 3, an after cooler 4 and a buffer tank 16, filter 17 and pressure swing adsorption tower 18, centrifugal compressor includes motor 1, first impeller 2, second impeller 8 and suspension bearing 20, the output shaft at motor 1 both ends passes through suspension bearing 20's support respectively with first impeller 2 and the direct coupling of second impeller 8, the exit end of first impeller 2 and the entry end of second impeller 8 are connected respectively to intercooler 3's both ends, the exit end of second impeller 8 links to each other with 4 entry ends of aftercooler, the 4 exit ends of aftercooler pass through check valve 7 and link to each other with buffer tank 16, buffer tank 16 passes through filter 17 and links to each other with pressure swing adsorption tower 18, centrifugal compressor, intercooler 3 and aftercooler 4 are integrated in compressor box 12.

In the embodiment, the traditional gear acceleration is abandoned, the output shafts at two ends of the ultra-high speed motor 1 are respectively and directly coupled with the first impeller 2 and the second impeller 8, and the air is compressed by ultra-high speed centrifugation of 35000rpm-200000rpm under the support of the ultra-high speed suspension bearing 20, so that the centrifugal compressor can generate high kinetic energy without the need of gear acceleration and large-diameter impellers. The air is filtered to the first impeller 2 of the ultra-high speed centrifugal compressor to be subjected to primary compression, and the compressed air cooled by the intercooler 3 enters the second impeller 8 at the other end to be subjected to secondary compression, so that the compression efficiency is optimal each time. The clean compressed air cooled by the after cooler 4 passes through the main pipeline and the check valve 7, passes through the air buffer tank 16 and the filter 17, finally enters the towers A and B of the adsorption tower 18, and pure oxygen exceeding the ISO8573-1Class0 standard is extracted through adsorption-desorption-punching. The centrifugal compressor supported by the high-speed bearing drives the rear transmission part to start to suspend and run at a super high speed, no mechanical loss and no abrasion are caused, the load of the compressor can be adjusted by 40-100% in a wide rotating speed range, and the running is more flexible and stable. Because the gear is cancelled, the noise is reduced, the surrounding environment is not influenced, the high-efficiency environment-friendly oxygen generator is really formed, and the high-efficiency environment-friendly oxygen generator can be completely placed in buildings such as clinics, courtyards and the like.

The electric machine 1 is connected to an air cooler 9 by means of a fan 10. The gas for oxygen generation and the motor cooling air are two different systems, and the heat generated by the ultra-high speed motor 1 in the box body 12 is sucked into the air cooler 9 through the special air duct and the fan 10 and then is discharged out of the box body 12 after being cooled, so that the quality of the centrifugally compressed air is not secondarily polluted by the air cooled by the ultra-high speed motor 1. The filter is free of oil and pollution, various expensive precision filters are greatly reduced, considerable consumable cost is reduced, and power consumption caused by pressure loss of the filter is saved. The outlet end of the rear cooler 4 is connected with the silencer 5 through the emptying regulating valve 6, the pressure swing adsorption tower 18 is provided with an electromagnetic valve 19, a sensor is arranged on a connecting pipeline, the sensor is a pressure sensor, a pressure difference sensor, a flow sensor and/or a temperature sensor, the frequency converter 13 is connected with the motor 1, the controller 14 is respectively connected with the frequency converter 13, the buffer tank 16, the filter 17 and the sensor, the controller 14 is connected with the touch screen 15, and the frequency converter 13 is connected with the frequency converter cooling mechanism 11. A set of control system for controlling the centrifugal compressor and the pressure swing adsorption tower 18 is formed by the emptying regulating valve 6, the frequency converter 13, the controller 14, the touch screen 15 and the electromagnetic valve 19, so that the control is more timely, more stable and more efficient, and the control is integrated and the full-automatic start and stop are realized. When the load rapidly decreases more than the surge range defined by the surge tank 16, the control system will rapidly decrease the speed and open the blow-down valve 6 to discharge through the muffler 5 by means of the pressure and flow sensors to prevent surging of the centrifugal compressor. The heat generated by the high-frequency converter 13 of the driving ultra-high-speed motor 1 is cooled by the frequency converter cooling mechanism 11, so that the frequency converter 13 has higher efficiency and is more quickly and accurately controlled.

The centrifugal compressor is one-stage compression or multi-stage compression, and the cooler can also perform cooling after each stage of compression, so that the compression efficiency is higher. The number of the pressure swing adsorption towers 18 is more than or equal to 2. Furthermore, the suspension bearing 20 is a dynamic pressure air bearing or a magnetic suspension bearing, the dynamic pressure air bearing is not only precise, but also simple in structure, low in manufacturing cost, free of maintenance, and capable of achieving a limit rotation speed of 300000rpm, so that the volume of the compressor can be smaller, and 8bar of compressed air can be achieved through 2-stage compression. When the compressed air passes through the intercooler 3 and the aftercooler 4, the high-temperature air is condensed to form hydrophobic water, and the hydrophobic water is discharged out of the compressor case 12 through the automatic drain valve after being accumulated to a certain degree. Compared with the traditional screw compressor and the traditional centrifugal compressor, the energy is saved by more than 25 percent, an expensive refrigeration dryer is not needed, the power loss of the oxygen generator is saved by more than 5 percent, and the equipment investment and the electricity cost are saved. A plurality of different types of filters 17 are installed on a connection pipe between the buffer tank 16 and the pressure swing adsorption tower 18. The refrigerant of the cooler is liquid or gas. The volume of the centrifugal compressor is only the size of the traditional motor, the centrifugal compressor, a cooler and the like are installed in the box body 12 together, the noise is further reduced, the compression efficiency is improved, and meanwhile, a cold dryer is omitted. Moreover, since the capacity of the centrifugal compression pressure stabilization buffer tank 16 can be greatly reduced, it is possible to completely integrate the pressure swing adsorption tower 18 into an oxygen generator.

The pressure swing adsorption oxygen production and the nitrogen production are the same equipment, the process is completely the same, and the embodiment can be used for producing nitrogen.

The above detailed description is provided for the centrifugal compression type pressure swing adsorption oxygen generator provided by the present invention, and the principle and the implementation mode of the present invention are explained in the present text by applying specific examples, and the description of the above examples is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.