Method for recycling flue gas waste heat of heating furnace during preparation of carbon disulfide

Abstract

The invention discloses a method and device for recycling the flue gas waste heat of a heating furnace during preparation of carbon disulfide. The method for recycling the flue gas waste heat of the heating furnace comprises the steps that during preparation of carbon disulfide, high-temperature flue gas generated by the fact that natural gas is burned through the heating furnace is fed into a waste heat boiler for heat exchange; the flue gas generated after heat exchange through the waste heat boiler is conveyed into a lithium bromide refrigerating unit for refrigeration; then, low-temperature water generated by the lithium bromide refrigerating unit is conveyed into a carbon disulfide condenser. A flue gas exhaust port of the heating furnace of the device is connected with the waste heat boiler through a pipeline, a flue gas exhaust port of the waste heat boiler is connected with the lithium bromide refrigerating unit through a pipeline, the lithium bromide refrigerating unit is connected with the carbon disulfide condenser through a pipeline, the high-temperature flue gas is converted into the low-temperature water which is used for condensation of the condenser, and therefore the purpose of recycling flue gas waste heat is achieved.

Description

technical field [0001] The invention relates to the field of energy recovery and utilization in the production and preparation process of carbon disulfide, in particular to a method for recycling and utilizing waste heat of heating furnace flue gas in the production process of carbon disulfide. Background technique [0002] When sulfur and methane are used as raw materials to prepare carbon disulfide, the heating furnace uses the heat energy generated by the complete combustion of natural gas to heat the furnace tube. After heating the furnace tube, a large amount of waste heat flue gas is generated, and the temperature is as high as 600 ° C. Generally, waste heat boilers are used to regenerate steam. At this time, the temperature emitted is above 150°C. The flue gas cannot be effectively recycled for a long time, and it will be directly discharged into the atmosphere, which will cause energy waste, high product consumption cost, and great impact on the environment, which is ...

AI Technical Summary

Problems solved by technology

The existing boiler heat exchange process has the following disadvantages: the exhaust gas temperature cannot be lowered to a lower temperature, which is above 150°C, and most industries hope to better recycle heat energy for clean and quiet flue gas, which can save energy

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