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Corrosion control device and lean amine solution regeneration system

A technology of corrosion control and regeneration tower, which is applied in the direction of gas fuel, petroleum industry, fuel, etc., can solve the problem of coating or non-metallic material falling off, and achieve the effects of low cost, avoiding erosion corrosion, and reducing buffer corrosion

Active Publication Date: 2022-06-03
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] This application provides a corrosion control device and a lean amine solution regeneration system, which can solve the problem of the risk of shedding of coatings or non-metallic materials in related technologies

Method used

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  • Corrosion control device and lean amine solution regeneration system
  • Corrosion control device and lean amine solution regeneration system
  • Corrosion control device and lean amine solution regeneration system

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Embodiment Construction

[0036] In order to make the objectives, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0037] Before explaining the embodiments of the present application in detail, the application scenarios of the embodiments of the present application are described first.

[0038] When the high-speed flowing lean amine liquid enters the regeneration tower, because the flow rate of the lean amine liquid is too fast, the mass transfer process between the lean amine liquid and the rich amine liquid will be accelerated, which will make the H in the lean amine liquid faster. 2 S and CO 2 The contact area between the depolarizer and the inner wall of the regeneration tower increases, which in turn will cause the corrosion product film formed on the inner wall of the regeneration tower to fall off, or cause the metal surface passivation film on...

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Abstract

The application discloses a corrosion control device and a lean amine liquid regeneration system, belonging to the technical field of natural gas purification. The device includes: a plurality of baffles, a support frame and a mist catcher; wherein, the plurality of baffles includes a plurality of first baffles and a plurality of second baffles; each of the first baffles The plate is connected to the surface of the support frame, each of the second baffles is connected to the surface of the mist catcher, each of the first baffles is opposite to each of the second baffles and It is arranged at intervals; the outer wall of the support frame is used to connect with the inner wall of the regeneration tower toward the top of the tower; the outer wall of the mist catcher is used to connect with the inner wall of the regeneration tower toward the bottom of the tower. In this way, the corrosion of the lean amine liquid and acid gas on the inner wall and gas phase channel of the regeneration tower can be effectively slowed down and controlled by controlling the flow rate of the lean amine liquid and acid gas and adjusting the flow state of the lean amine liquid and acid gas.

Description

technical field [0001] The present application relates to the technical field of natural gas purification, in particular to a corrosion control device and a lean amine liquid regeneration system. Background technique [0002] In the sulfur-containing natural gas treatment plant, the amine deacidification in the chemical absorption method is usually used to deacidify the natural gas, that is, the weakly alkaline amine liquid methyldiethanolamine (MDEA, methyldiethanolamine) chemical solvent is used to absorb the natural gas. Contains H 2 S. absorbed H 2 The MDEA-rich amine liquid of S will enter the regeneration tower, and in the regeneration tower, the MDEA-rich amine liquid will be decomposed at high temperature, releasing acid gas, so that the rich amine liquid will be regenerated into a lean amine liquid. However, the lean amine solution produced during the decomposition of MDEA rich amine solution contains highly corrosive H 2 S, water and MDEA degradation products a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L3/10
CPCC10L3/103Y02C20/40
Inventor 杨力计维安唐永帆戴万能廖珈周承美何飞
Owner PETROCHINA CO LTD
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