Method for adjusting and stabilizing steam pressure

Abstract

The invention discloses a method for adjusting and stabilizing steam pressure, which relates to a coal gas production method. The method for adjusting and stabilizing steam pressure comprises the following steps: raising steam pressure and raising an oxide layer, wherein the once raising distance of the oxide layer is smaller than or equal to the length of the oxide layer; dropping steam pressure and dropping the oxide layer, wherein the once dropping distance of the oxide layer is smaller than or equal to the length of the oxide layer; raising coal gas pressure in a furnace and raising steam pressure; and dropping coal gas pressure in the furnace and dropping steam pressure. At the third link of oxide layer circulation, the steam pressure begins to rise within 60 seconds after the oxide layer begins to drop. Within 60 seconds after the first link of oxide layer circulation begins, the steam pressure begins to drop. An eccentric furnace grate gasification agent is distributed unevenly. The steam pressure is adjusted or stabilized by externally discharging steam. The method has the advantages of low coal gas temperature, high oxide layer temperature, and low content of carbon in slag, the coal is saved and the labor intensity is lowered.

Description

Technical field [0001] The invention relates to a production method of coal gas. Background technique [0002] In the prior art, there is no relationship between the vapor pressure and the oxide layer, and the gasification efficiency is low. The publication number is CN1100132A "Methods and Equipment for Inferior Coal Gasification". The grate rotary shaft deviates from the axis of the furnace shell, and the gasification agent of the eccentric grate is unevenly distributed, which can easily cause partial furnaces, even fires, and large steam pressure fluctuations. Normally close the external steam valve. Summary of the invention [0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a method for adjusting and determining the steam pressure, and then reducing the change of the steam pressure in the gasification agent. [0004] In order to achieve the above purpose, the technical solution adopted is a steam pressure range of 0.07-0....

AI Technical Summary

Problems solved by technology

[0002] In the prior art, there is no relationship between steam pressure and oxide layer, and the gasification efficiency is low

The publication number is CN1100132A "Method and Equipment for Gasification of Inferior Coal". The rotary axis of the grate deviates from the axis of the furnace shell, and the gasification agent is distributed unevenly on the eccentric grate, which may easily cause partial furnace, even fire, and large fluctuations in steam pressure.