Low-carbon olefin cracking equipment and cracking method

Abstract

The invention relates to the field of petroleum cracking, and discloses low-carbon olefin cracking equipment and a cracking method. The low-carbon olefin cracking equipment comprises a convection section (2), a radiation section (5), a quenching boiler (6), a separation tower (8) and a pressure reduction device (10), wherein the convection section (2), the radiation section (5), the quenching boiler (6), the separation tower (8) and the pressure reduction device (10) are sequentially communicated, the pressure reduction device is used for enabling the pipelines, for material flowing, of the convection section (2), the radiation section (5), the quenching boiler (6) and the separation tower (8) to be in a negative pressure state, the radiation section (5) comprises a hearth and a furnace wall (11) arranged on the inner wall of the hearth, and at least part of the furnace wall (11) is arranged to be a special-shaped furnace wall. According to the invention, through the pressure reductiondevice, the pipelines, for material flowing, of the convection section, the radiation section and the quenching boiler are all in a negative pressure state, so that heavy cracking raw materials can be fully gasified in the convection section so as to save the process cost and effectively reduce the coking of the cracking furnace.

Description

technical field [0001] The invention relates to the field of petroleum cracking, in particular to low-carbon olefin cracking equipment for cracking crude oil in a reduced-pressure environment and a cracking method for preparing low-carbon olefins by using the low-carbon olefin cracking equipment. Background technique [0002] Low-carbon olefins usually refer to the general term of unsaturated hydrocarbons with carbon four or less, mainly including ethylene, propylene, isobutylene, butadiene and other organic chemical raw materials with high economic value. With the development of my country's economy, the demand for these organic chemical raw materials is increasing year by year. Although the production scale of low-carbon olefins is also increasing year by year, it cannot meet the growing demand. The technology to effectively increase the yield of low-carbon olefins has broad application prospects. [0003] For a long time, petroleum hydrocarbon cracking was mainly used to...

Images