Safety measures when functioning the Nichwell glove box
Vacuum glove box is extensively utilised in industries with large needs for gasoline purification. Despite the fact that the present glove box style is more reasonable and easy to operate. However, the structure inside the glove box is complicated, there are several critical parts, and the procedure is a bit incorrect, which might cause decline to your experimental results. This write-up introduces you how to accurately use the vacuum glove box, and the precautions when novices function the glove box.
One particular. Perform before procedure:
one. Examine if there is nitrogen in the nitrogen bottle. The nitrogen should be changed in time. glove box chemistry of nitrogen is set to .4mpa.
two. Check out no matter whether the vacuum pump is turned on generally.
3. Check no matter whether the circulation in the glove box is open up. (Purification column-I or purification column-II ought to open one particular of them)
4. Verify the upper limit pressure in the environment need to be +one, the reduce restrict pressure is
5. glove box laboratory equipment whether or not oxygen and dew stage are regular (oxygen is below .1ppm, dew stage is previously mentioned -forty)
six. The vacuum pump of the above-bin must be in the generally open state
two. Procedure notes:
one. The vacuum pump must be held on during method operation.
2. When the oxygen concentration in the tank exceeds 200PPM, the gear servicing personnel should be notified to operate the method, or else the h2o and oxygen purification program will be destroyed.
three. Just before beginning the cycle, check no matter whether the cabinet is in situation or regenerating. As the above mentioned operations are in development, it is totally forbidden to cycle.
4 .Two purification columns can't be regenerated at the identical time.
A. Ahead of regeneration, make certain that the glove box has been cleaned with inert fuel (H2O <200ppm) to ensure sufficient supply of regeneration gas. The regeneration gas pressure is 0.06-0.08mpa.
B. Before starting regeneration, please make sure that the corresponding purification column circulation is closed.
C. The regeneration process takes 24 hours. Once the execution cannot be disconnected, the regeneration gas should be passed 3-6 hours after the regeneration starts. Pay attention to the amount of regeneration gas, adjust the pressure of the regeneration gas appropriately, and ensure the sufficient supply of regeneration gas in these 3 hours. After 6 hours the regeneration origin can be turned off.
D. The vacuum pump cannot be turned off during the regeneration process. Do not touch the top of the purification column to prevent burns.
E. Once the regeneration is terminated unexpectedly, please ensure that the regeneration and circulation of the purification column cannot be restarted within 12 hours or the equipment will be damaged.
5. Care should be taken to protect the work gloves from being damaged during the operation.
