Novel high-temperature and high-pressure electric heating furnace

Abstract

A novel high-temperature and high-pressure electric heating furnace comprises a discharging tube, a reaction gas feeding tube, connectors, an Al2O3 ceramic reaction tube, a shell, a furnace lining gas feeding tube, silicon and molybdenum rods, aluminum silicate fiber heat-insulation cotton, a slagging tube and the like, wherein the upper end of the Al2O3 ceramic reaction tube is respectively connected with the discharging tube and the reaction gas feeding tube through the connectors, and connection positions are sealed by using graphite packing; the lower end of the Al2O3 ceramic reaction tube is connected with the slagging tube through a pipe, and a connection position is sealed by using high-temperature glue; the silicon and molybdenum rods are hung perpendicularly and are uniformly arranged around the Al2O3 ceramic reaction tube; a heat-insulation material is filled between the shell and an electric heating element; and inert gas with certain pressure is fed between the shell and the electric heating element. The Al2O3 ceramic reaction tube and the shell can bear the temperature of 1500 DEG C and the pressure of 1.5MPa, so that the novel high-temperature and high-pressure electric heating furnace is applicable to pilot-scale study on pyrolysis, gasification and combustion of solid carbonic fuels under the conditions of high temperature and high pressure, and has the advantages of quick temperature rising and stable pressurization.

Description

technical field [0001] The invention relates to a high-temperature and high-pressure electric heating furnace, which is especially suitable for pilot-scale research on the gasification, pyrolysis and combustion of solid carbon-containing fuels under high-pressure and high-temperature conditions, and belongs to the field of energy utilization. Background technique [0002] The high-temperature and high-pressure electric heating furnace not only has the characteristics of uniform furnace temperature and fast heat and mass transfer, but also increases the operating pressure of the heating furnace to make the equipment compact and reduce compression energy consumption and oxygen consumption. Temperature and pressure are key parameters that affect the rate of chemical reactions. For example, during coal pyrolysis, as the pressure increases, the formation rate of gaseous and solid products increases while the formation rate of liquid products decreases; as the temperature increases...

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Problems solved by technology

Common stainless steel pipes on the market can withstand pressure when used continuously at 800-1150°C, but when the temperature exceeds 1200°C, creeping phenomenon will occur and cannot withstand pressure

Therefore, if a stainless steel tube is used as the reaction tube, and the stainless steel tube is directly heated by electric heating, only normal pressure reaction can be carried out in the tube, and pressurized reaction cannot be carried out.

In view of the above reasons, the traditional heating furnace device is often difficult to meet both high pressure and high temperature conditions due to material limitations, and it is also difficult to find a high temperature and high pressure electric heating furnace that can react continuously on the market. Therefore, the high temperature and high temperature mentioned in the present invention Piezoelectric heating furnace has practical significance

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