Pipe type static eliminator

Abstract

The invention discloses a pipe-type electrostatic eliminator of hydrocarbon liquid conveying system, which comprises the following parts: oil conveying pipe, erasing out-pipe, and erasing needle, wherein the erasing out-pipe is set beyond the oil conveying pipe at certain space, which is fixed on the conveying pipe with two ends supported by flange; the erasing needle is fixed on the erasing out-pipe, whose front plugs in the oil conveying pipe for 6-12 mm. The electrostatic monitor is set on the outlet side of electrostatic eliminator, which can monitor the eliminator working condition at random. The invention can eliminate the electrostatic charge of conveyed oil, which avoids the electrostatic accidents.

Description

technical field [0001] The invention relates to a static eliminator, in particular to a static eliminator used in pipelines for transporting hydrocarbon liquids such as petroleum and petroleum products. Background technique [0002] During the transportation, loading and unloading and transportation of petroleum and petroleum products, due to the occurrence of mutual flow friction and eddy current movement between oil layers, especially during the transportation of pipelines, a large amount of electrostatic charge will inevitably be generated. A very high electrostatic voltage is formed in containers such as oil tanks, which can easily cause electrostatic explosions and fire accidents, resulting in huge economic losses. [0003] In order to reduce and prevent electrostatic accidents caused by pipeline transportation of oil products, there are no more than two preventive measures for pipeline static electricity adopted at home and abroad: one is to limit the fueling speed (fo...

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Problems solved by technology

[0002] During the transportation, loading and unloading and transportation of petroleum and petroleum products, due to the occurrence of mutual flow friction and eddy current movement between oil layers, especially during the transportation of pipelines, a large amount of electrostatic charge will inevitably be generated. A very high electrostatic voltage is formed in containers such as oil tanks, which can easily cause electrostatic explosions and fire accidents, resulting in huge economic losses

[0003] In order to reduce and prevent electrostatic accidents caused by pipeline transportation of oil products, there are no more than two preventive measures for pipeline static electricity adopted at home and abroad: one is to limit the fueling speed (for example <4.5-6m / s), but when the oil product When there is a filter in the delivery system and the oil is mixed with a lot of free water or ionized impurities, limiting the flow rate will be meaningless. At this time, even if the oil is delivered at a safe flow rate, electrostatic accidents will still occur

The second is to use pipeline grounding. However, pipeline grounding can only discharge the static charge on the pipeline shell, and it cannot discharge or eliminate the static charge in the pipeline oil. Therefore, this method also cannot avoid the occurrence of static charge discharge accidents.

Therefore, no matter which method is adopted in the traditional technology, the electrostatic charge of the oil transported in the pipeline cannot be effectively eliminated.

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