Equipment and method for preparing constant-pressure fuel gas

Abstract

The invention relates to equipment and a method for preparing constant-pressure fuel gas, and provides the equipment and the method for preparing the fuel gas in a clean, high-efficient and energy-saving manner. The equipment comprises a feeding device, a burning radiation heat transfer device and a convection heat transfer device, wherein the feeding device comprises a hot-blast stove and a coal mill; the burning radiation heat transfer device comprises a burner which is arranged at the bottom of the device, a water cooled wall which is arranged on the inner wall of the device, and a fuel gas outlet and a steam-water mixture outlet which are formed in the upper part of the device; the convection heat transfer device comprises an over-heater, a steam generator and a coal economizer. By the equipment and method disclosed by the invention, most of high-temperature fuel gas and heat energy of high-temperature molten slag inside the burning radiation heat transfer device are recycled; through convection heat transfer, high-quality overheat steam is produced, so that energy consumption is saved to the maximum, and the cost of the fuel gas is generally reduced.

Description

technical field [0001] The invention relates to the field of coal-based fuel gas, in particular to a device for preparing normal-pressure fuel gas. In addition, the present invention also relates to a method for preparing normal-pressure fuel gas. Background technique [0002] The resource endowment of rich coal, poor oil and little gas has made coal occupy the dominant position in China's energy consumption for a long time. How to cleanly, efficiently and energy-savingly utilize coal resources is an urgent technical problem to be solved. [0003] In coal chemical industry fields such as coal-to-synthetic ammonia, coal-to-natural gas, coal-to-oil, and coal-to-olefins, pressurized synthesis gas (CO+H 2 ), in response to this demand, over the years, Shell Furnace, Aerospace Furnace, GSP Furnace and other entrained gasification technologies using pulverized coal as raw materials have been successfully developed; Texaco and East China University of Science and Technology four ...

AI Technical Summary

Problems solved by technology

The currently applied atmospheric pressure fuel gas technology adopts fixed bed or fluidized bed technology, which has limited adaptability to coal types, and the waste heat of fuel gas, especially the waste heat in the high temperature section, cannot be well utilized, resulting in waste of energy and cost of fuel gas. The characteristics of the fixed bed or fluidized bed technology itself also lead to a decrease in the reliability of the entire coal-to-fuel gas plant. There is a large gap, which leads to the decline of the overall benefit of the device and the instability of gas supply to the downstream

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