Device and method for heating rich oil to remove benzene by using coke oven riser pipe waste heat

Abstract

The invention discloses a device for heating rich oil to remove benzene by using coke oven riser pipe waste heat, wherein the device comprises a rich oil processor for performing heat exchange distillation on rich oil, a rich oil regenerator, a lean oil processor for performing heat exchange cooling benzene washing on lean oil, an after-heat-exchange rich oil pipeline and a rich oil pump, and therich oil processor, the rich oil regenerator, the lean oil processor, the after-heat-exchange rich oil pipeline and the rich oil pump are sequentially connected through oil pipes. The invention further discloses a method for heating rich oil to remove benzene by using coke oven riser pipe waste heat, wherein rich oil is heated by using a coke oven riser pipe so as to overcome the consumption of alarge amount of steam and coal gas in the use process of the traditional tubular furnace and the medium-pressure steam and achieve the purposes of energy saving, consumption reducing and raw coke ovengas temperature reducing, and the rich oil is heated by the coke oven riser pipe and the traditional tubular furnace is not used so as to eliminate atmospheric pollution accidents caused by incomplete combustion of coal gas and achieve environment-friendly production.

Description

technical field [0001] The invention belongs to the field of equipment in the coal coking industry, and in particular relates to a device and method for heating rich oil and removing benzene by using the waste heat of a rising pipe of a coke oven. Background technique [0002] At present, the vast majority of domestic coking plants use tube furnaces to heat rich oil or medium-pressure steam to heat oil-rich debenzene processes. When using traditional tube furnaces to heat oil-rich debenzene processes, due to the use Using coal gas as a heating source will waste a lot of gas. At the same time, due to incomplete combustion of gas during combustion, the exhaust gas contains a large amount of harmful substances such as sulfur dioxide and nitrogen oxides, which may cause air pollution. When the medium-pressure steam is used to heat the rich oil, since a large amount of medium-pressure steam is needed to heat and distill the rich oil, a large amount of medium-pressure steam will b...

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Problems solved by technology

[0002] At present, the vast majority of domestic coking plants use tube furnaces to heat rich oil or medium-pressure steam to heat oil-rich debenzene processes. When using traditional tube furnaces to heat oil-rich debenzene processes, due to the use Using coal gas as a heating source will waste a lot of gas. At the same time, due to incomplete combustion of gas during combustion, the exhaust gas contains a large amount of harmful substances such as sulfur dioxide and nitrogen oxides, which may cause air pollution.

When medium-pressure steam is used to heat rich oil, since a large amount of medium-pressure steam is needed to heat and distill rich oil, a large amount of medium-pressure steam will be consumed in production, resulting in energy waste

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