Double flanged thermocouple failure and processing method

A, double flange thermocouple show is on the high side and the minute fluctuations.

installation location: atmospheric tank

failure phenomenon: instrument set up after the initial display is normal, liquid level changes biggish error occurs, static liquid level at the time showed fluctuations.

hazards: may cause waste discharge or empty cans or impact the production.

the cause of the problem analysis: 1, guide pressure pipe ( Capillary) May be leaked. 2, medium is too thick. 3, tanks and exhaust.

analysis points: thermocouple can't jam, emphatically analyzed the thermocouple itself and dielectric properties, in addition to consider the environmental impact.

check processing result: by analyzing the basic equipment and media influence, through the thermocouple time-phased judgment it is sensitive to temperature fluctuations, which may be canned the abnormal pressure media guide, capillary has space. Remove the suction flange to under observation for a period of time, have improved, so as to determine for negative pressure capillary wind gap. After the troubleshooting of the demolition of the capillary.

tip: if the canned not normal is the positive pressure side, the fault cannot be ruled out, can only replace the transmitter.

2, double flanged thermocouple volatility.

installation location: carbon dioxide absorption tower.

failure phenomenon: liquid level display frequently between zero and a relatively fixed value fluctuates up and down.

harm: properly adjust, prone to mixes up and overpressure explosion.

the cause of the problem analysis: lower suction flange equipment packing appear congestion fluid, causing negative pressure side frequent squeezes gas liquid two phase or solution space.

processing: open clogged and find out the reason, prevent again.

note: 1, equipment structure and process, before and after 2, understand the production condition of nearly a period of time. 3, to combine scientific analysis and data calculation, be convincing.