Before the normal production of formaldehyde production equipment, the preparations that need to be done are:
1. View methanol stock and formaldehyde stock;
2. Check whether the pipeline valve of the equipment is in good condition;
3. Check if the fan and pump are running normally;
4. Check whether the liquid level meter, the flow meter up and down the cork are open, and whether the liquid discharge check valve is closed;
5. Check whether the position of the valve should be closed and closed;
6. Check if each liquid level is in the normal position.
After preparation, you should follow the specific instructions:
1. When starting the blower for formaldehyde production equipment,
2. First turn the coupling to a few turns, check for obstacles, and check the oil level;
3. Confirm that there is no problem, officially turn on the fan, and notify the oxidation post to pay attention to adjust the air volume; 4. Open the methanol transfer pump, one tower and two tower circulation pump, cold water pump, etc.;
5. Turn on the cooling water (all coolers) into and out of the valve.
After the production task is completed, the formaldehyde production equipment parking operation is:
1. Gradually close the circulating exhaust valve entering the mixer and stop the circulating exhaust fan. And close all valves located on the main line of the exhaust gas cycle;
2. When the oxidation temperature is lower than 150 ° C and the air frequency is reduced to 10 Hz, the air blower is stopped;
3. Stop the methanol steam heating and close the methanol steam flow operation valve;
4. Stop the cycle of the absorption tower and stop all rotating equipment;
5, stop the exhaust gas processor, open the vent valve, close the exhaust valve;
6. Close the batching steam valve;
7. Thoroughly inspect all the valves, whether the pump is off or not, the ones that are open or not.
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