Natural gas demercuration device and method

Abstract

The invention discloses a natural gas demercuration device and method. The device comprises a raw gas precooler, a raw gas separator, a raw gas aftercooler, a refrigerating facility, a low-temperature separator and the like which are connected in sequence. The natural gas demercuration device and method have the positive effects that an internal demercuration member is arranged by improving an internal structure of the low-temperature separator, such that an alcohol-hydrocarbon solution is extracted from the side surface instead of being extracted from the bottom by low-temperature separation, and low-temperature liquid mercury is discharged from the bottom of the low-temperature separator to be subjected to low-temperature demercuration, dehydration and dealkylation. Mercury, water and heavy hydrocarbons in raw gas are separated and removed effectively by the low-temperature separator through adopting a low-temperature separation, demercuration, dehydration and dealkylation system consisting of the raw gas precooler, the raw gas separator, the raw gas aftercooler, the refrigerating facility and the low-temperature separator.

Description

technical field [0001] The invention relates to a device and method for removing mercury in natural gas by using a low-temperature separation process. Background technique [0002] With the massive development of global natural gas resources and the application of natural gas as a clean energy in industry and civil use, natural gas plays an increasingly important role in the energy field, and the natural gas mercury removal process has become an important part of natural gas processing and treatment . [0003] Mercury is a common harmful heavy metal element in natural gas. Mercury is highly volatile, highly toxic, and highly corrosive. In the process of natural gas treatment, mercury not only corrodes equipment but also poses a great threat to human health. Once mercury enters the environment, it will cause environmental pollution. Therefore, an effective measure to safely develop and utilize mercury-containing natural gas, protect personal safety, and prevent mercury from...

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Problems solved by technology

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a device and method for removing mercury from natural gas, which aims to solve the corrosion of equipment and the harm to the environment due to mercury in natural gas treatment, and effectively reduce the impact of mercury on alcohol-hydrocarbon liquid systems and ethylene glycol. The impact of alcohol regeneration system, reducing the amount of adsorbent and reducing engineering investment

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