Method of pressure relief of dead oil section of liquid pipeline

Abstract

The invention discloses a method of pressure relief of a dead oil section of a liquid pipeline. The method comprises the steps that the step 1, the critical pressure value is set; the step 2, a pressure monitoring alarm device and a controller are started, and a first valve, a second valve, a third valve and a fourth valve can be located in a disconnection state; the step 3, the pressure monitoring alarm device acquires pressure signals in real time and transmits the pressure signals to the controller; the step 4, the controller analyses the received pressure signals, when the pressure value is larger than the critical pressure value, the step 5 is carried out, and if not, the step 3 is carried out; and the step 5, as the pressure monitoring alarm device gives an alarm, the controller controls the third valve and the fourth valve to be connected, and the pressure relief is conducted through a pressure guide pipe. The method has the beneficial effects that the pressure monitoring alarmof the dead oil section of the liquid pipeline can be more timely, the pressure monitoring alarm accuracy rate of the dead oil section of the liquid pipeline is higher, and therefore the timely pressure relief is timely conducted on the dead oil section of the liquid pipeline, and the security of the liquid pipeline and the peripheral personnel and property security are improved.

Description

technical field [0001] The invention relates to the technical field of infusion pipelines, in particular to a pressure relief method for a dead oil section of a liquid pipeline. Background technique [0002] During the operation of the liquid pipeline, for the pipeline of the dead oil section, it is not considered in the design process or the temperature rise and expansion of the internal liquid are considered to be within a safe range during the design. No safety relief valve or thermal expansion valve is installed, resulting in liquid seepage from the flanges of valves and other flanges due to temperature rise in the dead oil section of the liquid pipeline, which eventually leads to safety accidents, causing great adverse effects on society and enterprises , It also brings a serious threat to the life and property safety of the people around the pipeline. If the relevant information such as whether the pressure of the pipeline in the dead oil section has risen is not gras...

AI Technical Summary

Problems solved by technology

No safety relief valve or thermal expansion valve is installed, resulting in liquid seepage from the flanges of valves and other flanges due to temperature rise in the dead oil section of the liquid pipeline, which eventually leads to safety accidents, causing great adverse effects on society and enterprises , which poses a serious threat to the lives and properties of the people around the pipeline

If the relevant information such as whether the pressure of the pipeline in the dead oil section has risen is not grasped in time, and timely processing is performed, it will cause liquid leakage, causing environmental pollution and personal and property losses.

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