Heavy oil deep processing method and device

Abstract

The invention relates to a heavy oil deep processing method and device, and belongs to the technical field of petroleum processing. The method comprises the steps of replacing part of pre-lifting steam with dry gas to form pre-lifting mixed gas, and fully contacting a catalyst with heavy oil under the action of the pre-lifting mixed gas to carry out catalytic cracking reaction. According to the method, the catalyst is protected to a certain extent, cracking of the catalyst is avoided, the activity and selectivity of the catalyst are improved, then product distribution is changed, the yield of gasoline and diesel oil in the product is increased, economic benefits are increased, and meanwhile, sewage discharge is reduced.

Description

technical field

[0001] The invention belongs to the technical field of petroleum processing, and in particular relates to a heavy oil deep processing method and device. Background technique

[0002] With the rapid increase in the demand for transportation fuels, my country's oil refining industry has carried out further processing of more heavy oil, especially vacuum residue.

[0003] The commonly used heavy oil deep processing methods at home and abroad mainly include thermal cracking, coking, catalytic cracking and hydrocracking. However, thermal cracking is rarely developed due to backward technology, and is gradually being eliminated. Coking is only suitable for processing vacuum residue. Although hydrocracking is advanced in technology, high in product yield, good in quality, and flexible, the equipment is complicated. Moreover, a large amount of hydrogen is required, so the technology and economy are limited to a certain extent, so that catalytic cracking occupies the...

Examples

Embodiment 1

[0035] The pre-lift gas is passed into the pre-lift gas feed pipe 110 at the bottom of the riser reactor 100, and the amount of the pre-lift gas added is 1.5 t / h, wherein the dry gas is 0.15 t / h, and the steam is 1.35 t / h. The heavy oil is passed into the riser reactor 100 from the heavy oil inlet pipe, and the amount of heavy oil added is 22.8 t / h. At the same time, the catalyst enters the riser reactor 100 from the outlet of the regenerator 300 and flows upwards driven by the pre-lift gas. When the catalyst After contacting the heavy oil, the catalytic cracking reaction is carried out in the riser reactor 100. The reaction conditions in the reaction zone of the riser reactor 100 are: reaction temperature 505°C, reaction pressure 0.1MPa, and the generated oil gas enters the settler 200 together with the catalyst to realize gas solid separation, the catalyst enters the regenerator 300 from the outlet of the settler 200 for regeneration, and the regenerated catalyst flows out fr...

Embodiment 2

[0042]The pre-lift gas is passed into the pre-lift gas feed pipe 110 at the bottom of the riser reactor 100, and the amount of the pre-lift gas added is 1.5 t / h, of which the dry gas is 0.22 t / h, and the steam is 1.28 t / h. The heavy oil is passed into the riser reactor 100 from the heavy oil inlet pipe, and the amount of heavy oil added is 22.8 t / h. At the same time, the catalyst enters the riser reactor 100 from the outlet of the regenerator 300 and flows upwards driven by the pre-lift gas. When the catalyst After contacting the heavy oil, the catalytic cracking reaction is carried out in the riser reactor 100. The reaction conditions in the reaction zone of the riser reactor 100 are: reaction temperature 505°C, reaction pressure 0.1MPa, and the generated oil gas enters the settler 200 together with the catalyst to realize gas solid separation, the catalyst enters the regenerator 300 from the outlet of the settler 200 for regeneration, and the regenerated catalyst flows out fr...

Embodiment 3

[0049] The pre-lift gas is passed into the pre-lift gas feed pipe 110 at the bottom of the riser reactor 100, and the amount of the pre-lift gas added is 1.5 t / h, of which the dry gas is 0.27 t / h, and the steam is 1.23 t / h. The heavy oil is passed into the riser reactor 100 from the heavy oil inlet pipe, and the amount of heavy oil added is 22.8 t / h. At the same time, the catalyst enters the riser reactor 100 from the outlet of the regenerator 300 and flows upwards driven by the pre-lift gas. When the catalyst After contacting the heavy oil, the catalytic cracking reaction is carried out in the riser reactor 100. The reaction conditions in the reaction zone of the riser reactor 100 are: reaction temperature 505°C, reaction pressure 0.1MPa, and the generated oil gas enters the settler 200 together with the catalyst to realize gas solid separation, the catalyst enters the regenerator 300 from the outlet of the settler 200 for regeneration, and the regenerated catalyst flows out f...

technical field

[0001] The invention belongs to the technical field of petroleum processing, and in particular relates to a heavy oil deep processing method and device. Background technique

[0002] With the rapid increase in the demand for transportation fuels, my country's oil refining industry has carried out further processing of more heavy oil, especially vacuum residue.

[0003] The commonly used heavy oil deep processing methods at home and abroad mainly include thermal cracking, coking, catalytic cracking and hydrocracking. However, thermal cracking is rarely developed due to backward technology, and is gradually being eliminated. Coking is only suitable for processing vacuum residue. Although hydrocracking is advanced in technology, high in product yield, good in quality, and flexible, the equipment is complicated. Moreover, a large amount of hydrogen is required, so the technology and economy are limited to a certain extent, so that catalytic cracking occupies the...

Examples

Embodiment 1

[0035] The pre-lift gas is passed into the pre-lift gas feed pipe 110 at the bottom of the riser reactor 100, and the amount of the pre-lift gas added is 1.5 t / h, wherein the dry gas is 0.15 t / h, and the steam is 1.35 t / h. The heavy oil is passed into the riser reactor 100 from the heavy oil inlet pipe, and the amount of heavy oil added is 22.8 t / h. At the same time, the catalyst enters the riser reactor 100 from the outlet of the regenerator 300 and flows upwards driven by the pre-lift gas. When the catalyst After contacting the heavy oil, the catalytic cracking reaction is carried out in the riser reactor 100. The reaction conditions in the reaction zone of the riser reactor 100 are: reaction temperature 505°C, reaction pressure 0.1MPa, and the generated oil gas enters the settler 200 together with the catalyst to realize gas solid separation, the catalyst enters the regenerator 300 from the outlet of the settler 200 for regeneration, and the regenerated catalyst flows out fr...

Embodiment 2

[0042]The pre-lift gas is passed into the pre-lift gas feed pipe 110 at the bottom of the riser reactor 100, and the amount of the pre-lift gas added is 1.5 t / h, of which the dry gas is 0.22 t / h, and the steam is 1.28 t / h. The heavy oil is passed into the riser reactor 100 from the heavy oil inlet pipe, and the amount of heavy oil added is 22.8 t / h. At the same time, the catalyst enters the riser reactor 100 from the outlet of the regenerator 300 and flows upwards driven by the pre-lift gas. When the catalyst After contacting the heavy oil, the catalytic cracking reaction is carried out in the riser reactor 100. The reaction conditions in the reaction zone of the riser reactor 100 are: reaction temperature 505°C, reaction pressure 0.1MPa, and the generated oil gas enters the settler 200 together with the catalyst to realize gas solid separation, the catalyst enters the regenerator 300 from the outlet of the settler 200 for regeneration, and the regenerated catalyst flows out fr...

Embodiment 3

[0049] The pre-lift gas is passed into the pre-lift gas feed pipe 110 at the bottom of the riser reactor 100, and the amount of the pre-lift gas added is 1.5 t / h, of which the dry gas is 0.27 t / h, and the steam is 1.23 t / h. The heavy oil is passed into the riser reactor 100 from the heavy oil inlet pipe, and the amount of heavy oil added is 22.8 t / h. At the same time, the catalyst enters the riser reactor 100 from the outlet of the regenerator 300 and flows upwards driven by the pre-lift gas. When the catalyst After contacting the heavy oil, the catalytic cracking reaction is carried out in the riser reactor 100. The reaction conditions in the reaction zone of the riser reactor 100 are: reaction temperature 505°C, reaction pressure 0.1MPa, and the generated oil gas enters the settler 200 together with the catalyst to realize gas solid separation, the catalyst enters the regenerator 300 from the outlet of the settler 200 for regeneration, and the regenerated catalyst flows out f...

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