Glove boxes, are often seen in laboratories.
Laboratory vacuum glove box is a kind of inert gas protection box that can vacuum the main box body. The vacuum degree in the box meets ≤ -1 bar. It can quickly evacuate the air in the box. Glove box system consists of the main box, transition chamber, control unit, purification unit and other components. Configured with a purification system vacuum glove box can meet the H2O and O2 ≤ 0.1ppm, leakage rate of ≤ 0.001vol%h, suitable for most industry applications operation. The system consists of the highest quality components ……
However, the glove box may protect your safety in critical moments, because the laboratory, dangerous factors may be more than you can imagine.
The most common hazards in the laboratory—dangerous chemical experiments
In chemical experiments, harmful gases that damage human health are often released, and such gases seriously jeopardize the health of the experimenters and the atmosphere. When conducting experiments in a laboratory, one can use exhaust devices such as fume cupboards to prevent the operator from inhaling harmful gases as much as possible.
However, if teachers want to conduct chemistry demonstration experiments in the classroom where they teach, the harmful gases produced will have to circulate in the classroom, affecting the health of teachers and students.
In addition, the current ventilators only have the function of ventilating and exchanging air, which cannot completely avoid the harm to the human body and cannot purify the harmful gases. They are harmful gases directly out of the outdoors, become a source of pollution of the air environment.
In view of the shortcomings of the above existing technology, the purification glove box can avoid human injury and pollution of the environment. The technical solution to the problem is to include a glove box body, gas adsorption and purification device, glove box body is made of high quality 304 stainless steel and tempered glass, the box is equipped with a glove port and a glove with which the sealing connection, integrated modular inlet and outlet valves; gas adsorption and purification system; the outlet valves of the glove box body through the induced draft fan and the inlet of the said gas adsorption and purification device are connected through a hose.
Chemical experiment glove box has the following characteristics: maximize the avoidance of contact between the experimental personnel and the experimental environment, no gas pollution, fire and explosion-proof, to ensure the safety and health of the experimental personnel human body. The polluted gas produced in the chemical experiment is purified and then discharged to the lower atmosphere, which overcomes the disadvantage of the previous ventilation device that only ventilates but does not purify, and avoids the pollution of the atmospheric environment.
Laboratory Refrigerator
Extraction or dialysis in the use of organic reagents, open placed in the refrigerator, because the organic gas reaches a critical concentration, by the refrigerator compressor start-up spark detonation, the cause of the accident, are not the quality of the refrigerator itself caused by the people in the refrigerator placed in the refrigerator of petroleum ether, acetone, benzene, butane gas and other chemicals. We know that the temperature inside the refrigerator is low, if placed in the refrigerator after the boiling point of low, low flash flammable and explosive chemicals, they will volatilize the combustible gases at low temperatures.
Even if the cap is twisted tightly, the low temperature will often cause the bottle to shrink, the valve to loosen or even rupture the bottle. Volatile combustible gases mixed with air to form explosive mixtures in the refrigerator, meet the temperature control switch (or other control switches) to open and close the sparks occurring very easy to explode. Therefore, the refrigerator users must not casually store chemicals in the refrigerator.
Similarly, chemicals stored in the laboratory glove box should also pay attention to, although the temperature is a minimum of -36°C, accuracy of ±1 °C, but must not be in contact with open flames, pay attention to the storage of press safety issues.
On the handling of liquid nitrogen
Many people use glass, button cap centrifugal tubes filled with samples, put into the liquid nitrogen tank, take out the tube wall properties have changed, can not withstand the expansion of the gas pressure, or its own rapid warming of the pressure is not uniform, the explosion occurred.
For this reason, when operating on liquid nitrogen, close the operation and provide good natural ventilation conditions. Operators must be trained and strictly follow the operating procedures. It is recommended that operators wear cold-proof gloves. Prevent gas leakage into the workplace air. Handle gently to prevent damage to cylinders and accessories. If possible, try to use a glove box and operate in a vacuum environment when handling liquid nitrogen.
Radioisotopes
Illegal handling of radioisotopes, not wearing gloves, unprotected head and chest and littering of radioactive materials. Failure to clean isotope-contaminated recoveries immediately after the experiment.
Centrifuge
The three conditions for a combustion explosion to occur in a centrifuge are: combustibles, oxidizers, and ignition sources. The temperature of the material has a significant effect on the combustion explosion. The possibility of a combustion explosion is higher when the temperature of the material handled by a scraper centrifuge is below its flash point or when the temperature handled by a non-scraper centrifuge is equal to or above its flash point.
In order to reduce this danger, the use of inert gas or other gas protection; control the concentration of oxygen, can be used to flow monitoring method, pressure monitoring method, if the positive pressure operation, it is best to use pressure monitoring method. Generally, oxygen concentration monitoring method can be used to strictly control the concentration of oxygen.
Glove box is the high-purity inert gas into the box, and the cycle of filtering out the water, oxygen, organic gases and other substances in the laboratory equipment. It can be widely used in the ultra-pure environment without water, oxygen and dust. Therefore, if there are conditions, in the use and storage of some dangerous experimental supplies, or for some experiments that require a special environment, it is best to prepare a reliable quality glove box, in a low water and oxygen, high vacuum environment.
If you have any questions, please contact me at ella@etelux.com.
