A desalination regeneration device for salt-containing ethylene glycol solution

Abstract

The invention discloses a desalting regeneration device of salt-containing ethylene glycol solution. The desalting regeneration device comprises feeding, a salt loop, a thermal cycling loop, a centrifuging loop and recycling of ethylene glycol, wherein a salt-containing ethylene glycol solution storage tank is connected with a raw material feeding hole of a flash evaporation tank through a pipeline with a raw material pump; a backflow discharging hole of the flash evaporation tank is connected with a backflow liquid inlet of the flash evaporation tank through a pipeline with a salt pump; a circulation discharging hole of the flash evaporation tank is connected with a heater through a pipeline with a circulation pump; the heater is connected with a circulation feeding hole of the flash evaporation tank through a pipeline; the salt pump is connected with a centrifugal machine through a pipeline; a solid-phase outlet of the centrifugal machine is connected with a salt collecting tank; a liquid-phase outlet of the centrifugal machine is connected with the inlet of a centrifugal buffer tank through a pipeline; a liquid-phase outlet of the centrifugal buffer tank is connected with the backflow liquid inlet of the flash evaporation tank through a pipeline; and a gas-phase outlet of the flash evaporation tank is connected with an ethylene glycol storage tank through a pipeline with a condenser. The desalting regeneration device disclosed by the invention is capable of effectively desalting salt-containing ethylene glycol solution; and therefore, the corroding and scaling problems of equipment are solved.

Description

technical field [0001] The invention belongs to the field of oil and gas storage and transportation engineering, and relates to an ethylene glycol regeneration device, in particular to a desalination regeneration device for a salt-containing ethylene glycol solution and a process thereof. Background technique [0002] In the development of natural gas fields, the moisture in them will form hydrates with hydrocarbons at a certain temperature and pressure, which will cause blockage of equipment such as pipeline valves and affect the normal operation of production. Once hydrate blockage occurs, on the one hand, it will cause a huge loss of production, and on the other hand, it is very difficult and expensive to solve the problem of equipment blockage. Therefore, hydrate inhibitors are often used in natural gas development. There are many kinds of inhibitors, such as methanol, ethylene glycol, diethylene glycol, calcium chloride aqueous solution, etc., but because ethylene glyc...

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Problems solved by technology

Scaling will affect the heat exchange effect of the reboiler and heat exchanger, and in severe cases, the entire ethylene glycol recovery unit cannot work normally and has to be shut down for maintenance

[0006] In the development of deep-water gas fields, the produced fluid contains high salinity, and the existing methods are not enough to remove the salt; the same problem also exists in the development of onshore gas fields. The system has not been desalinated, resulting in fouling and blockage in the reboiler

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