Liquid fuel synthesis system

Abstract

Disclosed is a liquid fuel synthesis system (1) which comprises: a reformer (12) for reforming a hydrocarbon raw material to produce a synthetic gas composed mainly of a carbon monoxide gas and a hydrogen gas; a waste heat boiler (14) for recovering waste heat from the synthetic gas discharged from the reformer (12); a bubble column reactor (30) for reacting the synthetic gas to conduct the synthesis reaction of a liquid fuel; a heat transfer pipe (32) for recovering the reaction heat of the synthesis reaction of the liquid fuel, wherein the heat transfer pipe (32) is provided inside of the bubble column reactor (30); and heat treatment units (24, 40, 70) for conducting a given heat treatment by utilizing a water vapor generated in the waste heat boiler (14) or the heat transfer pipe (32).

Description

technical field [0001] The present invention relates to a liquid fuel synthesis system for synthesizing liquid fuel from hydrocarbon raw materials such as natural gas. [0002] This application claims priority to Japanese Patent Application No. 2006-95534 for which it applied on March 30, 2006, and uses the content here. Background technique [0003] In recent years, GTL (Gas To Liquid: synthesis of liquid fuel) technology has been developed as one of methods for synthesizing liquid fuel from natural gas. The technology is to generate carbon monoxide gas (CO) and hydrogen (H 2 ) as the main component of synthesis gas, using the synthesis gas as a raw material gas, through the Fischer-Tropsch synthesis reaction (hereinafter referred to as "FT synthesis reaction") to synthesize liquid hydrocarbons, and then by adding the liquid hydrocarbons Hydrogen and refining, manufacturing naphtha (naphtha), kerosene, light oil, wax and other liquid fuel products. [0004] In the conven...

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Problems solved by technology

[0005] However, the steam generated from the device for recovering the exhaust heat of the reformer (such as an exhaust heat boiler) or the device for recovering the reaction heat of the reactor (such as a heat transfer pipe) has a relatively low pressure of, for example, about 1.2 MPaG. steam (hereafter referred to as "medium pressure steam"), which is therefore not effectively utilized and most of it is cooled and discarded as condensate discharge

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