Skid-mounted device for ultrasonically dehydrating, removing liquid, purifying and separating for natural gas

Abstract

The invention relates to a skid-mounted device for ultrasonically dehydrating, removing liquid, purifying and separating for natural gas, belongs to an energy-saving purification device of heat engineering, and is mainly applied in the field of dehydrating, removing liquid, purifying and separating for natural gas. The device consists of a gas purification device and a gas separation device. Wet natural gas enters an ultrasonic separation spray pipe respectively; because the temperature is reduced, water and heavy paraffin hydrocarbon components in the natural gas become liquid and then are condensed to form high-speed rotational flow to tangentially flow into a hydrate separator cylinder; and then three-phase separation of the natural gas, condensate and water is carried out, and simultaneously the hydrate is prevented from being generated. The device efficiently separates out the water and the heavy hydrocarbon liquid from the natural gas without adding any chemical drugs, has the advantages of energy conservation, environmental protection, compact structure, and little occupied area, reduces the running cost, can achieve unmanned operation and free maintenance, and can be applied to remote or severe environmental land and offshore platforms.

Description

technical field [0001] The device of the invention belongs to a thermal energy-saving purification device and is mainly used in the field of natural gas dehydration, liquid removal, purification and separation. Background technique [0002] The natural gas produced from the wellhead is not a clean single-phase gas, but a multi-phase fluid containing moisture, heavy component hydrocarbons, etc. This multiphase fluid can have serious consequences if it enters the delivery piping system untreated. In particular, the presence of moisture reduces the calorific value of natural gas and the transport capacity of gas pipelines; when conditions are right, the moisture in natural gas will precipitate in the form of liquid water, and at the same time form heavy hydrocarbon condensate in pipelines or Fluid buildup in the device. This will not only increase the flow pressure drop, even form a slug flow, but also accelerate the corrosion of pipelines and equipment by acidic components i...

AI Technical Summary

Problems solved by technology

Although these conventional methods have a series of advantages, there are also many disadvantages, such as the dehumidification method (TEG) that added ethylene glycol to the system, which was widely used more than 40 years ago, and the turbine that was widely used 25 years ago— Treatment technologies such as expansion method have their fatal shortcomings: the former will form toxic hydrated substance BTEX (aromatic hydrocarbon) due to the addition of ethylene glycol, causing environmental pollution

In order to prevent pipeline corrosion, corrosion-resistant alloy (CRA) pipelines are usually used, and the cost is very high

At the same time, in order to prevent the pollution of the environment caused by toxic hydrates, it is necessary to use expensive vacuum desalination devices and pay for the subsequent maintenance and operation costs

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