How to prevent freezing of oil refining units in Northeast China
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How to prevent freezing of oil refining units in Northeast China 1. How to prevent freezing and anti-condensation when the unit is running 2. How to prevent freezing and anti-condensation when the unit is stopped
1. The pipelines are heated and insulated. 2. Heating nitrogen protection for pipelines and equipment.
More:Add heating cable:victory:
Heating wire, water trap, steam line needs to be installed intermittently in winter, otherwise once the valve opens, it will easily freeze at night.
Winter is the most annoying. When the heat tracing is put into use, the water trap must also be ensured to be in good use. If it really doesn't work in some places, just let it run. Important places should be taken care of.
The main thing is to insulate pipelines, equipment, containers, etc. Some also need to add steam tracing or hot water tracing. Note that dead corners are prone to freezing. Also check that the trap is easy to use and flexible. These are necessary.
The main ones are special plans, inspection and implementation before cooling down, and shift handover inspection and supervision.
Pay attention to heat tracing, hydrophobic and water cutting inspections
First of all, there must be a complete and detailed anti-freeze and anti-condensation plan. Parts prone to freezing and condensation must be regularly inspected. An inspection ledger of parts prone to freezing and condensation must be established and confirmed and signed by the inspector. Try to use superheated steam for pipeline heating, and open the cross-line for equipment with small circulating water flow.
start: Heat tracing + uninterrupted flow. Stop work, short time: Purge the steam to see the steam. long time: Disassemble the equipment (stand up the core of the heat exchanger, remove plugs for air cooling, disassemble the pump for oiling and maintenance, open all low-point condensation valves, etc.)
1. The medium is in a flowing state； 2. According to the medium conditions, use steam, air, nitrogen, etc. to purge ； 3. No need to blind the pipeline, vent at low point ； 4. Add steam heating, electric heating, etc. ；