Low-carbon olefin cracking equipment and cracking method
A technology for low-carbon olefins and equipment, which is applied to the cracking of low-carbon olefins and the field of low-carbon olefins cracking equipment, can solve the problem that crude oil cannot be directly used as a raw material for cracking, and achieve the effect of saving process costs and reducing coking.
Active Publication Date: 2020-04-17
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
[0024] The purpose of the present invention is proposed in order to overcome the problem that the crude oil existing in the prior art cannot be directly used as cracking raw material
Method used
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Embodiment 1
[0090] Adopt the light olefin cracking equipment provided by the invention (as figure 1 shown) for the cleavage reaction. The low-carbon olefin cracking equipment includes a fan 1 , a convection section 2 , a radiation section 5 , a quench boiler 6 , a reboiler 7 , a separation tower 8 , a condenser 9 , and a decompression device 10 .
[0091] First, start the decompression device 10, and control the pressure of the equipment at 5KPa, so that the equipment is in a negative pressure state; the crude oil after removal is gasified and preheated through the convection section 2, and then enters the radiant section furnace tube 3 for cracking reaction; The combustion system of radiant section 5 adopts the combination of bottom burner and side wall burner, the heat supply ratio of the bottom burner is 80%, and the burner uses oxygen-enriched air for combustion, and the oxygen concentration in the oxygen-enriched air is 30% (V / V). The preheating temperature of the crude oil in the...
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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, and the radiation section (5) comprises a hearth, a furnace wall (11) arranged on the inner wall of the hearth, at least one tube bundle (3) arranged in the hearth and a plurality of combustors (4) arranged on the side wall and / or the bottom wall of the hearth.According to the invention, through the pressure reduction device, the pipelines, for material flowing, of the convection section, the radiation section and the quenching boiler are all in a negativepressure 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...
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Patent Timeline
Login to View More IPC IPC(8): C10G9/00
CPCC10G9/00C10G2300/1037
Inventor 张利军周丛李蔚王国清石莹张兆斌刘俊杰
Owner CHINA PETROLEUM & CHEM CORP