Newtech (Hangzhou) Energy Technology Co., Ltd

 

This medical oxygen equipment for hospitals is an efficient gas separation system designed for medical environments to provide continuous and stable high-purity oxygen. Through advanced pressure swing adsorption technology (PSA), the equipment can separate pure oxygen from the air to meet the continuous demand for oxygen in hospitals and support oxygen therapy requirements in wards, emergency rooms and operating rooms. Its main advantages include autonomous oxygen production, reduced dependence on external oxygen supply, reduced operating costs, and the system design is easy to maintain and operate, ensuring that high-quality oxygen can be quickly provided in emergency situations.

 

 

The medical molecular sieve oxygen production system uses air as raw material and uses the PSA (pressure swing adsorption) principle to produce oxygen through compression, conversion, and adsorption functions. The compressed air formed by the screw air compressor in the medical molecular sieve oxygen production system flows into the air tank in the oxygen production system after filtering, cooling, and drying. The compressed air in the air storage tank enters the molecular sieve oxygen generator, and the air passes through the molecular sieve in the molecular sieve oxygen generator. The nitrogen molecules in the air are attached by pressurization, so that the oxygen in the air can be separated from nitrogen and produce oxygen with ideal purity. After the oxygen is prepared and buffered by the oxygen storage tank, it is transported to the gas supply pipeline of the medical institution and used at various oxygen terminals in the hospital. The medical molecular sieve oxygen production system has the advantages of convenient operation, fast start-up and low failure rate. The entire system can be started or terminated only by the switch on the control interface, and the operation is extremely simple. A few minutes after the facility is turned on, high-purity and high-yield oxygen can be produced, and the oxygen production rate is fast. Because the oxygen production system controls all the inlet and outlet solenoid valve switches, it is necessary to select solenoid valves of reliable quality to ensure the safe and stable operation of the system.

 

(1) Working principle of air compressor

The working cycle of the screw air compressor can be divided into three processes: intake, compression and exhaust. As the rotor rotates, each pair of meshing teeth completes the same working cycle in succession.

â‘  Intake process: When the tooth groove space of the yin and yang rotors turns to the opening of the intake end wall, its space is the largest and communicates with the intake port. Because the gas in the tooth groove is completely discharged when the exhaust is completed, the tooth groove is in a vacuum state. When it turns to the intake port, the outside air is sucked in and enters the tooth groove of the yin and yang rotor along the axial direction. When the inlet side end face of the rotor turns away from the inlet port of the casing, the gas in the tooth groove is closed.

â‘¡Compression process: When the yin and yang rotors finish inhaling, the tooth tips of the yin and yang rotors will be closed with the casing. Their meshing surfaces gradually move toward the exhaust end. The tooth groove space between the meshing surface and the exhaust port gradually becomes smaller, and the gas in the tooth groove is compressed and the pressure increases.

â‘¢Exhaust process: When the meshing end face of the rotor turns to communicate with the exhaust port of the casing, the compressed gas begins to be discharged until the meshing surface of the tooth tip and the tooth groove moves to the exhaust end face. At this time, the meshing surface of the yin and yang rotors coincides with the tooth groove of the casing exhaust port, and the exhaust process is completed.

 

(2) Working principle of oxygen generator

The adsorption function of the molecular sieve in the oxygen generator is used to produce product oxygen with a purity of 93%. When compressed air passes through the adsorption tower filled with molecular sieve particles, the molecular sieve attaches nitrogen molecules, carbon dioxide and moisture in the compressed air by virtue of its selective attachment ability to different molecules, thereby increasing the oxygen content in the gas and producing oxygen of qualified purity. Because the molecular sieve has limited attachment capacity, when the attached nitrogen molecules form a saturated state, its attachment function will be weakened. Using low-pressure gas backflush, the molecular sieve particles will desorb nitrogen molecules, and the nitrogen molecules will be discharged to the outside of the equipment with the backflush gas, and the molecular sieve will restore its attachment function. This process is also a secondary utilization process. To ensure a continuous supply of oxygen, it is usually practiced to use more than two adsorption towers, one of which is used to pressurize the adsorption of nitrogen molecules and obtain product oxygen; the other is to use low-pressure backflush to desorb nitrogen molecules and restore the adsorption function of the molecular sieve to prepare for the next pressurized adsorption.

 

(3) Working principle of cold dryer

The refrigeration system of the cold dryer belongs to compression refrigeration, which is composed of five basic elements: refrigeration compression equipment, cooling equipment, evaporation equipment, expansion valve and heat exchanger. They are connected in sequence through pipes to form a sealed space. The refrigerant circulates continuously in the system to complete the heat exchange between the compressed air and the condensing medium, reduce the temperature of the compressed air and condense the saturated water in the air, and achieve drying and cooling in parallel.

 

 

PSA medical oxygen generator can be roughly divided into two parts: â‘  oxygen production module; â‘¡ analysis and control module. The oxygen generation module is what we often call the molecular sieve tower. It is the core component of the oxygen generator and the main component of the PSA (pressure swing adsorption) oxygen production principle. A large number of molecular sieves are filled in the molecular sieve tower. The molecular sieve has the structure and characteristics of the body, the surface is a solid skeleton, and the internal pores can play the role of adsorbing molecules. There are channels connecting the holes, and the molecules pass through the channels. Due to the clean nature of the holes, the pore size distribution of the molecular sieve is very uniform. The molecular sieve selectively adsorbs molecules according to the size of the holes inside its crystal, that is, according to the different molecular sizes of oxygen, nitrogen, carbon dioxide and other rare gases in the air, it adsorbs molecules of a certain size and excludes molecules of larger substances.

The adsorption of zeolite molecular sieve has two characteristics: â‘  The Lewis center polarity on the surface is very strong: â‘¡ The size of the cage or channel in the zeolite is very small, which makes the gravitational field therein very strong. Therefore, its adsorption capacity for adsorbate molecules far exceeds that of other types of adsorbents. Even if the partial pressure (or concentration) of the adsorbate is very low, the adsorption amount is still considerable. The adsorption separation effect of zeolite molecular sieve is not only related to the size and shape of the adsorbate molecules, but also to their polarity. Therefore, zeolite molecular sieve can also be used to separate substances of similar size.

 

The analysis and control module is mainly composed of CPU controller, electrochemical analyzer, pneumatic valve, relay, pilot valve, pressure switch, back pressure regulator and other components. The CPU controller mainly has a robust programmable logic controller (PLC) which can automatically control and monitor all parameters of the oxygen generator and implement the molecular sieve tower through these parameters. Workflow such as air intake, oxygen production, balance, and nitrogen exhaust.

 

 

(1) Hospital oxygen supply system

Ward oxygen supply: This equipment provides continuous and stable high-purity oxygen in hospital wards to meet the breathing needs of patients with various diseases. Especially for patients who need long-term oxygen therapy, such as patients with chronic obstructive pulmonary disease (COPD) and pulmonary fibrosis, the equipment can provide the required high-concentration oxygen to improve their quality of life and treatment effects. The high efficiency of the equipment ensures the continuity and stability of oxygen supply and prevents the risk of oxygen shortage, which is particularly important for the long-term management of patients with chronic diseases.

Emergency room support: In the emergency room, the equipment can quickly provide high-concentration oxygen, which is crucial for dealing with acute respiratory problems. For example, when responding to emergencies such as asthma attacks, acute pneumonia attacks or cardiac arrest, the equipment can quickly provide sufficient oxygen to help patients stabilize their breathing and maintain vital signs. The rapid response of the emergency room requires an efficient oxygen supply. The timely supply of equipment can improve the success rate of first aid and improve the first aid effect of patients.

Operating room application: During surgery, a stable oxygen supply plays an important role in anesthesia, postoperative recovery and overall surgical safety. The equipment can ensure the ideal level of oxygen concentration in the operating room, which is crucial for the effectiveness of anesthetic drugs, postoperative recovery, and prevention of postoperative complications (such as postoperative dyspnea). A stable oxygen supply can reduce respiratory problems during and after surgery, improve the safety of surgery and recovery speed of patients, and thus support the efficient work of the surgical team.

 

(2) Support during the epidemic

Ventilators and oxygen therapy equipment: During large-scale epidemic outbreaks, such as the COVID-19 pandemic, hospital medical oxygen equipment has played a key role, providing important oxygen support for ventilators and oxygen therapy equipment. Severely ill patients usually require a large amount of high-concentration oxygen to maintain normal blood oxygen levels and improve respiratory function. The efficient and stable supply of equipment can ensure that patients get enough oxygen throughout the treatment process, help them through the acute phase of the disease, and improve clinical prognosis. The reliability and continuity of the equipment make it an indispensable part of hospitals when responding to public health emergencies.

 

(3) Home oxygen therapy solutions

Long-term oxygen therapy: For patients who need long-term home oxygen therapy, such as patients with chronic obstructive pulmonary disease (COPD), hospital medical oxygen equipment provides an efficient and economical oxygen supply solution. This device can stably provide high-purity oxygen in a home environment, allowing patients to receive oxygen therapy in the comfort of their own home, avoiding the hassle of frequent trips to hospitals or oxygen supply stations. The device is designed with safety and convenience in mind for home use, providing patients with a reliable source of oxygen to support their long-term effective oxygen therapy management at home.

Portability: Modern device designs often include portable options to make them suitable for home environments and patients' daily activities. This removable device is not only convenient for patients to use at home, but also allows patients to continue to maintain the required oxygen supply when they are away. The convenience of portable devices significantly improves the quality of life of patients, allowing them to carry out daily activities without restrictions, maintaining independence and activity in life. The lightness and ease of operation of the device help patients better integrate into family life and social activities, improving their overall life experience.

 

 

 

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