Maintenance system and method for air blowing type level gauge

Abstract

The invention relates to a maintenance system and method for an air blowing type level gauge. The maintenance system includes a reaction kettle, an air blowing type level gauge, a vacuum stop valve, and a nitrogen gas delivery pipe. The air blowing type level gauge is composed of a positive pressure measuring tube needle, a special blowing valve, a level gauge positive pressure measuring tube, a level gauge negative pressure measuring tube, a differential pressure transmitter, a blowing two-way base, and flanges. The air blowing type level gauge is mounted at the top of the reaction kettle. The level gauge positive pressure measuring tube is mounted at a position of at least half of the reaction kettle through a flange. The positive pressure measuring tube needle is mounted in the level gauge positive pressure measuring tube. The special blowing valve is mounted on the nozzle of the level gauge positive pressure measuring tube and is in contact with the positive pressure measuring tubeneedle. The negative pressure measuring tube is mounted on the top of the reaction kettle through a flange. The nitrogen gas delivery pipe is respectively connected to the level gauge positive pressure measuring tube and the level gauge negative pressure measuring tube through the differential pressure transmitter, the blowing two-way base and the vacuum stop valve in sequence. According to the maintenance system and method for the air blowing type level gauge, the dredging of the needle is performed by the level gauge positive pressure measuring tube and the negative pressure measuring tube,so the operation is simple and convenient, and the operation risk and labor intensity are also reduced.

Description

technical field [0001] The invention relates to a maintenance system and method for an air blowing liquid level gauge, in particular to a system and a method for unclogging the clogging of a measuring liquid level gauge in a reaction kettle. Background technique [0002] Our polyester polyester production adopts a three-pot process, that is, two esterification reactors and one polycondensation reactor. The two esterification reactors are equipped with air blowing liquid level gauges. [0003] Blowing type liquid level gauge is also called gas intervention type liquid level gauge or blowing type liquid level gauge. The blowing type liquid level gauge is an indirect medium contacting liquid level instrument, its output pressure can automatically follow the change of the pressure at the outlet of the blowing pipe, and keep the output gas flow stable. The gas blowing liquid level gauge probe, the gas source, the differential pressure transmitter, the gas steady flow unit, et...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is a maintenance system and method for an air-blown liquid level gauge, which solves the problem of clogging of the measuring tube or abnormal liquid level of the air-blown liquid level gauge in an esterification reactor, and reduces operational risks and labor intensity , to ensure normal production

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