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Secondary steam recovery and utilization system after power generation of screw expander

A screw expander, secondary steam technology, applied in the petroleum industry, gas fuel, fuel and other directions, can solve the problems of waste, energy cannot be effectively used, etc., and achieve the effect of low transformation cost

Inactive Publication Date: 2019-06-04
宋贤露
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

A large amount of combustible gas containing methane flashed out of the amine liquid flash tank is directly sent to the torch for combustion, and this part of the energy cannot be effectively used, resulting in waste

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  • Secondary steam recovery and utilization system after power generation of screw expander

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Embodiment Construction

[0011] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0012] Such as figure 1 The shown secondary steam recovery and utilization system after the screw expander generates electricity includes an LNG storage tank, an absorption tower, an amine liquid recovery boiler, and an amine liquid flash tank, and the amine liquid flash tank is connected to a fuel gas pipeline through a separation tank; There is an air inlet at the bottom of the absorption tower, and an amine liquid separator is arranged at the top.

[0013] The ...

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Abstract

The invention relates to the technical field of flash evaporation gas recovery and utilization, and particularly discloses a secondary steam recovery and utilization system after power generation of ascrew expander. The secondary steam recovery and utilization system comprises an LNG storage tank, an absorption tower, an amine liquid regeneration boiler and an amine liquid flash evaporation tank,wherein the amine liquid flash evaporation tank is connected to a fuel gas pipeline through a separation tank, the bottom portion of the absorption tower is provided with a gas inlet, and the top portion of the absorption tower is provided with an amine liquid separator. According to the system, natural gas discharged from the LNG storage tank is washed to remove solid and liquid impurities, andthe washed natural gas flows from the gas inlet on the bottom portion of the absorption tower from bottom to top; an amine liquid flowing out from the amine liquid regeneration boiler flows from the amine liquid separator at the top portion of the absorption tower from top to bottom; the amine liquid and the natural gas form convection contact; the amine liquid enters the amine liquid flash evaporation tank after the amine liquid absorbs the acid gas in the natural gas; and the flash evaporated gas passes through the separation tank, and then flows into the fuel gas pipeline. According to thepresent invention, with the secondary steam recovery and utilization system, the flash evaporated combustible gas is recovered, and is used as the fuel gas so as to effectively achieve the purposes ofenergy saving and consumption reducing.

Description

technical field [0001] The invention relates to the technical field of recovery and utilization of flash steam, in particular to a secondary steam recovery and utilization system after a screw expander generates electricity. Background technique [0002] The amine liquid flash tank is needed in the process of natural gas processing. The original process flow is that the amine liquid absorbs the carbon dioxide in the natural gas and then enters the amine liquid flash tank. Through the pressure change from 5.6Mpa to 0.32Mpa, the amine liquid is here The flash evaporation in the storage tank contains a large amount of methane, and this part of the gas is vented to the flare through the pressure control valve for combustion. A large amount of combustible gas containing methane flashed out of the amine liquid flash tank is directly sent to the torch for combustion, and this part of energy cannot be effectively used, resulting in waste. Contents of the invention [0003] The pu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14C10L3/10
Inventor 宋贤露
Owner 宋贤露