Faults and Solutions of GLC shell and tube coolers

Poor

heat

transfer   performance

Insufficient cooling water

1.Open large intake valve.

2.Check pipelines,valves,filters,whether heat   exchanger tubes are blocked,if any,should be excluded.

Air exists in or between heat exchanger   tubes.

Turn down the screw plug to exhaust.

Fouling in or between heat exchanger   tubes increases flow resistance.

Cleaning of fouling on the inner and   outer surfaces of heat exchanger tubes.

Water and oil mixing was found at the   outlet.

1. When the leakage is caused by the   breakage of the heat exchanger tube,it should be blocked by the pipe plug(the   number of pipe plugs should not exceed 10% of the total number).

2. Replacement of leaky heat exchanger   tubes.

3. The expansion joint of heat exchanger   tube and tube sheet is loose and needs to be re-expanded.

Leakage occurred at flange bolt   connection.

1. Tighten fasteners on flanges or   replace gaskets.

2. After the cooler is disassembled,use   new gaskets as far as possible.

Fixed tubesheet,floating tubesheet and   heat exchanger nozzle are corroded,which makes the seal of cooler invalid.

Replacement of tube bundles.