Naturally circulated heat removal method and system for slurry-bed reactor of Fische-Tropsch synthesis

Abstract

The invention discloses a naturally circulated heat removal method and a system for slurry-bed reactor of Fische-Tropsch synthesis. The method comprises aerated water in a circulated heat removal system circulates naturally without being powered by a pump to recover reaction heat in a reactor, wherein the circulated heat removal system is accounted by water circulation. The circulated heat removal system comprise a steam dome, a concentrated ascending pipe, a concentrated descending pipe and a hot removal member disposed in the reactor, wherein the steam dome, the concentrated descending pipe, the concentrated ascending pipe and the hot removal member constitute the circulated heat removal system of a circulation pump, so that the aerated water circulate naturally with no need of arranging the circulation pump, thereby greatly reducing energy consumption of apparatuses and simplifying operations.

Description

technical field [0001] The invention relates to the fields of coal-to-oil and natural gas liquefaction to oil, and more particularly, to a natural circulation heat extraction method and system for a slurry bed Fischer-Tropsch synthesis reactor. Background technique [0002] The Fischer-Tropsch synthesis reaction used for coal-to-oil or natural gas-to-oil is a strong exothermic reaction, and a large amount of heat is released while synthesizing oil. Most of the reactors in the slurry bed Fischer-Tropsch synthesis technology use the method of generating steam to remove the heat of reaction, control the reaction temperature, maintain the progress of the reaction, and effectively recover the heat of reaction at the same time. In order to ensure the reliable and effective operation of the steam generation system, the steam-water circulation scheme of pump forced circulation is often used. See the attached figure 1 . [0003] as attached figure 1 As shown, the boiler feed water...

AI Technical Summary

Problems solved by technology

With the expansion of the scale of the slurry bed Fischer-Tropsch synthesis unit, the steam production is also increasing. The total steam production of a single reactor is above 500t / h. With the current forced circulation scheme, the shaft power of a single circulating water pump Above 2MW, the energy consumption is extremely high; in addition, the hot water circulating pump transports high-temperature saturated water, which requires high sealing of the pump, and it is difficult to select the type. many

Images