Methanation furnace for producing methane from coal synthesis gas and production method of methanation furnace

Abstract

The invention relates to the technical field of chemical equipment, in particular to a methanation furnace for producing methane from coal synthesis gas and a production method of the methanation furnace. The method is characterized in that the synthesis gas passes through catalyst beds in the radial direction after entering gas distributors from synthesis gas inlets on the side wall of the methanation furnace to be distributed; methane gas synthetized by reaction flows out from a methane gas outlet at the lower part of the methanation furnace after being collected by a central tube of a central gas collector; longitudinal tube nests are arranged in each catalyst bed; and boiler water enters from water inlets at the lower part, enters the longitudinal tube nests through lower water collecting looping pipes and flows out from upper water collecting looping pipes after absorption reaction heat is vaporized. According to the methanation furnace for producing the methane from the coal synthesis gas, the flowing direction of the synthesis gas flowing through the catalyst beds is changed, so that the catalytic reaction is more completely performed; secondly, the tube nest intensively arranged pass through the horizontal catalyst beds arranged at equal interval, so that a cooling effect is obvious, and the reaction temperature can be easily controlled; and the gas collector is also arranged to collect the methane gas in the manner of unification. The methanation furnace for producing the methane from the coal synthesis gas is higher in industrial application value.

Description

[technical field] [0001] The invention relates to the technical field of chemical equipment, in particular to a methanation furnace used in the field of coal-to-synthesis gas to produce natural gas and a production method thereof. [Background technique] [0002] Natural gas, a multi-component mixed gaseous fossil fuel, has become one of the three major petrochemical energy sources in my country. Its main components are alkanes, of which methane accounts for the vast majority, and a small amount of ethane, propane and butane. It mainly exists in oil fields and natural gas fields, and a small amount comes from coal seams. Since natural gas does not produce waste residue and waste water after combustion, it has the advantages of safe use, high calorific value, and cleanness compared with coal, oil and other energy sources. Therefore, it is used in power generation, Chemical industry, civilian fuel, industrial fuel and other important fields are vigorously popularized and applied....

AI Technical Summary

Problems solved by technology

[0014] (3) Due to the structural characteristics of adiabatic reaction, the metal temperature of the pressurized shell of the equipment is high, the thickness of the pressurized shell is thick, the requirements for materials are high, and the cost of equipment is expensive;

[0015] In summary, although the process flow of coal-to-methane seems to be simple, there are defects in the process parameters and reaction devices that need to be improved in actual production.

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