Abstract
Background The pressure drop in the cylindrical filter element of filters manufactured for natural gas cleaning can be measured only together with the pressure drop in the filter housing, the magnitude of which is the main value in the total pressure drop. For example, the maximum allowable pressure drop across the mesh-type filter element is 2.3 times lower than the average pressure drop across the filter housing. Under these conditions it is not possible to estimate even approximate pressure drop in the cylindrical filter element. Significant errors associated with this type of control can lead to emergencies and destruction of the cylindrical filter element. Currently there is no technical solutions of the pressure drop control in the cylindrical filter elements for natural gas, that could ensure the necessary reliability of measurements. Aims and Objectives Rational location of sensors with required measurement reliability for pressure drop control in the natural gas cylindrical filter elements Results It is proposed that purified and nonpurified gas sampling to control the pressure drop in the cylindrical filter element be implemented in its lower part, allowing a more reliable and early signal of the need to remove solids from the filter. It is also proposed that the purified gas pressure sensor made of a curved steel tube be inserted through the wall of the housing and the filter cup into the bottom part of the inner volume of the cylindrical filter element, so that the sensor hole is located in the side wall of the tube at the same level as the port of the nonpurified gas pressure sensor, and the upper end of the tube is hermetically sealed. Using these results ensures reliable pressure drop measurement in the cylindrical filter element and allows to improve the safety of gas filter operation.
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