Equipment and method for cooling synthesized gas

Abstract

The invention relates to equipment and method for cooling synthesized gas. The equipment and method is characterized in that the synthesized gas, which is generated by a gasifier and carries fly ash, with the temperature higher than the fusion point of coal ash is preliminarily cooled to reach the temperature close to the fusion point of the ash, is cooled to 700-900 DEG C through a high-temperature convection cooler, enters a low-temperature convection cooler, is cooled to 300-400 DEG C, and is cooled to 200-300 DEG C through a low-temperature heat exchanger; nozzles for spraying decoking agents are arranged at the bottom of a radiation cooler, the decoking agents enter the radiation cooler through the nozzles 3 to inhibit coking of the inlet of the high-temperature convection cooler, an ash blower and a knocker are arranged at the inlet of the low-temperature convection cooler, and continuous and stable operation of the coolers is guaranteed. The equipment and method has the advantages that the synthesized gas is cooled through the heat exchanger, cooling by chilling gas or chilling water is not needed, the gas processing flow of the coolers and dry dedusting and washing units is lowered greatly, equipment size and manufacturing cost are lowered, and the energy consumption of gasification equipment is lowered.

Description

technical field [0001] The invention belongs to the technical field of coal-made high-temperature synthesis gas cooling, and in particular relates to a cooling device and method for high-temperature ash-containing synthesis gas. Background technique [0002] When coal or other carbon-containing fuels can undergo gasification reaction in the presence of oxygen or oxygen-containing gas, a synthesis gas containing a large amount of carbon monoxide and hydrogen, and a small amount of carbon dioxide, nitrogen and other gases can be produced. The synthesis gas can be used in the chemical industry It can also be used as a raw material for clean fuels, or to prepare clean fuels, and has a wide range of uses. At present, the mature coal gasification technology can be divided into three types: fixed bed, fluidized bed and entrained bed according to the characteristics of chemical engineering. Among them, the entrained bed gasification furnace is a fast gasification reaction. Under th...

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Problems solved by technology

In short, in the current waste boiler process, the heat of high-temperature gas in the range of 1500 degrees to 800 degrees is difficult to recover with equipment, and it needs to be cooled by chilled gas return gas, which causes problems of high equipment investment and energy consumption. This is because the high-temperature gas carries Sticky ash, sticky ash is easy to stick to the tube wall of the heating surface of the waste pot, which is caused by blocking the synthesis gas channel of the waste pot

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