Coking furnace for slowing down coking trend

Abstract

The invention discloses a coking furnace for slowing down coking trend. The coking furnace comprises a furnace body, radiation chambers, a convection chamber, radiation hearths, furnace tubes and burners, wherein the furnace body is of a structure resembling the Chinese character Ping, the radiation hearths are the inner space of the radiation chambers and are of a lower-trapezoid and upper-trapezoid combined hollow structure, there are two radiation chambers, the upper part of space in the radiation chambers is the convection chamber, two sets of the furnace tubes are arranged in the whole furnace body, each radiation hearth is provided with one set of the furnace tubes, each set of the furnace tubes comprises a plurality of horizontally arranged furnace tubes and further comprises mutually connected convection tubes and radiation tubes, each part of the convection chamber is horizontally provided with a plurality of rows of the convection tubes corresponding to one set of the furnace tubes, the center of each radiation hearth of the radiation chambers is longitudinally provided with one set of the radiation tubes, inlets of the convection tubes are connected with a heated oil pipeline, outlets of the radiation tubes are connected with a pipeline of a coke tower; there are a plurality of burners located at the bottom of the hearths and symmetrically and vertically arranged near or against two side walls in the furnace at two sides of the radiation tubes in the radiation hearths of the radiation chambers.

Description

technical field [0001] The invention relates to the field of petrochemical industry, in particular to a coking heating furnace for slowing down the tendency of coking. Background technique [0002] The delayed coking process is a thermal reaction process that converts heavy residual oil into light oil products, gaseous hydrocarbons and petroleum coke through thermal processing. The product quickly reaches the reaction temperature required for coking, and then quickly enters the coke tower for coking reaction, so the coking heating furnace is the core equipment of the delayed coking unit. [0003] The coking heating furnace heats the coking furnace feed rapidly to the coking temperature of 485-510°C, and then quickly enters the coke tower for further cracking and condensation to generate gas, gasoline, diesel oil, wax oil and coke. The design requirement of the coking furnace is that it should be in a short time (427 ℃ + residence time <40s) to provide enough required he...

AI Technical Summary

Problems solved by technology

[0004] At present, coking heating furnaces, especially when processing super-heavy unconventional crude oil residues, deep-drawn slag and various asphalt materials, have problems such as fast coking speed of furnace tubes and short operation period of a single furnace (generally 6-10 months for a single furnace) , which interferes with the production plan of the whole plant, damages production efficiency, increases maintenance costs and energy consumption

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