Detection method and measuring system for piston gradient of dry gas tank

Abstract

The invention relates to an on-line detection method of gradient of a gas tank, and in particular relates to a detection method and a measuring system for piston gradient of a rubber membrane dry gas tank. The detection and determination of the piston gradient of the gas tank are realized by adopting two differential pressure transmitters, a display instrument, a PLC (programmable logic controller) or an industrial personal computer, and the method particularly comprises the following steps: 1) four measuring oil cups are adopted and are respectively fixed on a walk platform of the circumference of the piston in the gas tank; 2) oil outlets of the two measuring oil cups of the two differential pressure transmitters positioned at two ends of the same diameter of a round piston are respectively connected with a differential pressure transmitter through a pressure conducting pipe and a three-valve manifold, wherein the differential pressure transmitter is connected with the display instrument or the industrial personal computer; and 3) under the condition of homing of the piston of the gas tank, the output zero points of the two differential pressure transmitters are timed on line, and then the two differential pressure transmitters are put into operation. According to the invention, the differential pressure transmitters are adopted for the first time to be used for measuring tank location balance, the technical scheme is simple, the cost is low, the differential pressure transmitters are safe and reliable, and economical and practical; and least detection devices are used, a special mathematical model is combined, and the out-of-limit alarming of arbitrary point can be achieved.

Description

technical field [0001] The invention relates to a method and a system for detecting the inclination of a gas holder, in particular to a method and a measuring system for detecting the inclination of a rubber film dry-type gas holder piston. Background technique [0002] As one of the important facilities of iron and steel enterprises, the gas cabinet plays an important role in storing gas, adjusting the pressure of gas pipeline network, rationally using energy, and reducing environmental pollution. At present, the gas cabinets used at home and abroad can be divided into two types: dry gas cabinets and wet gas cabinets. Compared with the wet gas tank, the dry gas tank has the advantages of long service life, stable gas storage pressure, less pollution, convenient operation and safe operation. The recovery of converter gas usually uses the Wiggins type gas cabinet, which has the functions of storing, stabilizing and mixing the gas recovered from the converter, and has the adv...

AI Technical Summary

Problems solved by technology

The problems of this method are: 1. The amount of work to make the annular water tank on the piston is too large, and it can only be made when the gas tank is built. It is very difficult to increase the water tank in the later stage, and the construction is very unsafe (it is not allowed to fire after the gas tank is put into operation. , one is flammable and explosive, and the other is that welding slag is easy to burn the rubber curtain); 2. In winter, the water in the tank will freeze and cannot be measured, and in other seasons, the water is easy to evaporate, resulting in inaccurate measurement of the liquid level; 3. Capacitive liquid level gauges have low accuracy and poor repeatability, and the cost of installing 4 sets is high; 4. The detected data has not been fully developed and utilized, and it is impossible to achieve a tilt-over-limit alarm at any point other than 4 points

When the temperature difference between the two sides of the cabinet is 20°C, the 100,000 m3 cabinet is tilted by 12mm, and the dome roof is deformed by heat, so the measured data can no longer be used. In addition, the cost of this solution is too high, and it is not suitable to implement because it requires fire.

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