Motors & Engines

Intelligent Oxygen Supply System for Underground Works

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Application

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The intelligent oxygen supply system for underground work is mainly applied in the concentrated oxygen supply in such closed environment as the isolated protective cabin, confined space, underground air defense facilities, mine and refuge chamber, and it can also be applied to the supplementary oxygen supply for the emergency oxygen supply in oxygen-dificient environment.

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Introduction

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?? The intelligent oxygen supply system for underground works is a set of miniaturized real-time oxygen supply device specially designed according to the volume of the isolated space. Through the automatic control of the solid oxygen source, the system can carry out the monitoring of the environmental oxygen concentration by the oxygen-passing sensor in a certain period of time and a certain part of space, set the system according to the requirements of basic life support of oxygen, and supplement oxygen to the space timely and rapidly. The duration and oxygen supply amount can be set flexibly according to the space volume, the number of personnel and guarantee time.

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?? The intelligent oxygen supply system is so far the most efficient and reliable method of supplying oxygen in a diffuse manner to the isolated space. Integrated design, intelligent control, user-friendly operation, long duration, high safety and trouble free setting have brought numerous national invention patents.

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Characteristics

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?? The system contains 8 pieces of solid oxygen, which can be opened 8 times by sequence according to the environmental needs. Each piece of solid oxygen contains 500L pure oxygen, therefore the total oxygen capacity of 8 pieces is 4000L. The product can meet requirements of oxygen enrichment in different spaces. It has flexible configurations and can be set based on the specified calculation of the space volume, either in a larger way or a smaller way. The cooperative utilization between the system and the air adsorption device researched and fabricated by the company will surely bring better effect.

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>High Purity Oxygen: The release process is also the process during which oxygen is generated, so there is no need for additional storage. With as high as 99.9% purity and no other hazardous gases, the oxygen released complies with the medical oxygen requirements in the Pharmacopoeia of People& acute;s Repubulic of China.

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?? >Safe and Reliable: The one-time oxygen release amount can be designed in according with the unit space volume and the requirements of environmental oxygen concentration. The solid oxygen wil stay solid at normal pressure before and after the oxygen release initiate to ensure high safety and reliability. The testing machine can work for 6h within the temperature range of -5℃-50℃, and both the function and performance meet the requirements of environmental adaptability.

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?? >High Speed Oxygen Release: Once the system started, the oxygen concentration of the space can be raised rapid to reach the setting value of the oxygen content being necessary for life in the space.

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?? >Excellent Oxygen Storage Capacity: In case of same unit volume, the mass density of solid oxygen is higher than similar products, 10 times of compressed oxygen, 1.6 times of potassium superoxide. The molecular weight? of the system is 106.5, and its oxygen density is 1123G/L; while the molecular weight of the high pressure bottle is 32, its oxygen density is 172G/L; the molecular weight of the superoxide is 71, its oxygen density is 963G/L. Therefore, the capacity of oxygen storage of the system is the best in the same space.

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Technical Parameters

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Item | Model | Performance Parameters | Remarks |
Intelligent oxygen supply system for underground works | ZWG500-8 | Oxygen Release | ≧2100L/H | Assume a person consumes 0.38L pure oxygen per minute, the oxygen release per hour can sustain the oxygen demand by 92 persons. |
Capacity of oxygen source | 500L*8 | 8 pieces of solid oxygen in total, each of them contains 500L |
Purity of oxygen | ≧99.9% | ? |
Weight of solid oxygen | 2.1kg*8 | 8 pieces of solid oxygen in total, each of them weight 2.1kg |
Valid storage period of solid oxygen | 1500 days | ? |
Power | 0.3kw | ? |
Operating voltage | 220v | ? |
Operating current | 350mA | ? |
Capacity of standby battery | 2600mAh | ? |
Charging time | 2.5h | ? |
Working Time | 3h | ? |
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Design theoretical calculation and actual test basis of the system

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The system has the data set based on the assumption that the isolated space is 40m3 (Referring to the assumption that a person needs 0.38L pure oxygen per minute under normal condition for basic calculation)

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Solid oxygen(pc) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
Oxygen generated(L) | 500 | 1000 | 1500 | 2000 | 2500 | 3000 | 3500 | 4000 |
Continuous service time for 1 person(min) | 21.9 | 43.8 | 65.7 | 87.6 | 109.5 | 131.4 | 153.3 | 175.2 |
Continuous service time for 2 person(min) | 11 | 21.9 | 32.8 | 43.8 | 54.75 | 65.7 | 76.65 | 87.6 |
Continuous service time for 3 person(min) | 7.3 | 14.6 | 21.9 | 29.2 | 36.5 | 43.8 | 51.1 | 58.4 |
Continuous service time for 4 person(min) | 5.475 | 10.95 | 16.425 | 21.9 | 27.375 | 32.85 | 38.325 | 43.8 |
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Measured data for the set space (testing in the 10m3 isolated space)

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Oxygen release time(min) | 0 | 3 | 6 | 9 | 15 | 18 | 21 |
Oxygen purity sensor 1(oxygen content) | 20.84% | 21.19% | 22.09% | 22.99% | 23.77% | 25.03% | 25.03% |
Oxygen purity sensor 2(oxygen content) | 20.3% | 21.1% | 21.8% | 22.6% | 23.5% | 24.5% | 24.4% |
Oxygen purity sensor 3(oxygen content) | 20.8% | 21.7% | 22.3% | 23.0% | 24.1% | 25.2% | 25.1% |
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In actual use, as the space cannot be absolutely airtight and the oxygen consumption varies with people, the duration that the solid oxygen can sustain is shorter than the theoretical value. Consequently, it is suggested that more solid oxygen be stored.

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