Heat-storage tubular gas heating furnace

Abstract

The invention provides a regenerative tubular gas furnace characterized in that a tubular exchanger is arranged in the center of the regenerative furnace, combustion chambers are arranged at two sides of the furnace, two regenerators are arranged at the lower part of the combustion chambers; cold gas for combustion is introduced from the upper part of the regenerators, an intake pipe for combustion air is introduced from the lower part of the combustion chambers, a four-way reversal valve is respectively connected with the combustion air inlet, a blower and an induced draft, an inlet and an outlet for circulating the gas are mounted on the tubular exchanger. The device is used for carrying out secondary heating of the circular gas in the dry distillation process of oil shale and is capable of continually, uniformly and stably supplying a hot gas with the temperature of 700 DEG C for a dry distilling furnace. The device has small volume, low manufacturing cost and high heat efficiency which is higher than 90%; the temperature of the heated gas can be adjusted according to the requirement. The intermittent operation of the Fushun regenerative furnace and no continuous heat supply thereof are changed.

Description

technical field [0001] The invention relates to a device for reheating circulating gas in an oil shale dry distillation process. Background technique [0002] In the oil shale carbonization process, it is necessary to supply hot gas at about 700°C to the heating furnace, and it should be continuous, balanced and stable, otherwise the carbonization process cannot be carried out normally. The Fushun regenerative heating furnace is an intermittently working device. There is a combustion chamber and a regenerator in the furnace. When the heat is stored, the gas cannot be heated, and when the gas is heated, the heat cannot be stored. Therefore, three heat storage chambers are generally used. The method of alternately working the heating furnace can only provide hot gas whose temperature fluctuates from 500°C to 700°C. Therefore, the vaporization combustion reaction section can only be added to the retort furnace to make up for this deficiency, and the final result leads to oil re...

AI Technical Summary

Problems solved by technology

The Fushun regenerative heating furnace is an intermittently working equipment. There is a combustion chamber and a regenerator in the furnace. When the heat is stored, the gas cannot be heated, and when the gas is heated, the heat cannot be stored. Therefore, three heat storage chambers are generally used. The heating furnace works alternately, but it can only provide hot gas whose temperature fluctuates from 500°C to 700°C. Therefore, the vaporization combustion reaction section can only be added to the retort furnace to make up for this deficiency, and the final result leads to oil recovery. The efficiency is low, and the retort furnace is easy to coke and other problems, so that the full cycle process cannot be realized

In addition, the Fushun type regenerative heating furnace uses checker bricks as the heat storage carrier, and the heat capacity is small, resulting in a large regenerative heating furnace

The Brazilian tubular heating furnace can provide continuous, balanced and stable hot gas at about 700°C. However, in order to reduce the exhaust gas temperature, this kind of heating furnace has to increase the heat exchange area, which makes the heat exchange device part of the heating furnace extremely large and consumes A large number of steel materials increase the cost of the furnace

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