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A system and method for improving the utilization rate of cracking ethylene raw materials

A cracking technology for ethylene production and utilization rate, which is applied in organic chemistry, hydrocarbon oil treatment products, hydrocarbon oil treatment, etc., can solve the problems of inability to split furnace cracking, difficulty in setting optimal cracking reaction temperature, optimal cracking residence time, Problems such as low ethylene yield

Active Publication Date: 2021-09-14
SINOPEC SHANGHAI ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The cracking raw material utilization rate of the above-mentioned prior art invention patent is only 20wt%, and due to the co-cracking process of mixing light cracking raw materials and heavy cracking raw materials, split furnace cracking cannot be carried out, and it is difficult to set the optimal cracking reaction temperature and optimal cracking residence time. time, so the prior art has the problems of long process flow, low utilization rate of crude oil, and low yield of ethylene

Method used

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  • A system and method for improving the utilization rate of cracking ethylene raw materials
  • A system and method for improving the utilization rate of cracking ethylene raw materials
  • A system and method for improving the utilization rate of cracking ethylene raw materials

Examples

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Effect test

Embodiment 1

[0078] This embodiment is an exemplary embodiment of the present invention.

[0079] Such as figure 1 As shown, a system for improving the utilization rate of cracking ethylene raw materials, including crude oil desalination pretreatment section 1, crude oil dehydration pretreatment section 2, crude oil preheating treatment section 3, oil stripping section 4, gas cracking section 5, liquid Cracking Section 6, Quenching Oil Section 7, Quenching Water Section 8, Compression Section 9, Distillation and Separation Section 10, Crude Oil Desalting Pretreatment Section 1, Crude Oil Dehydration Pretreatment Section 2, Crude Oil Preheating Section 3 and Oil Stripping Section 4 is connected through pipelines, the gas cracking section 5 is connected with the oil stripping section 4 and the quenching water section 8 respectively through pipelines, the liquid cracking section 6 is connected with the oil stripping section 4 and the quenching oil section 7 respectively through pipelines, and...

Embodiment 2

[0136] In order to verify the reliability of the above-mentioned system and method for improving the utilization rate of cracking ethylene raw materials, the inventors have carried out a group of control experiments, as follows:

[0137] Experimental group 1

[0138] A petroleum factory that adopts the system and method for improving the utilization rate of cracking ethylene raw materials of the present invention has an ethylene production scale of 1 million tons / year, and the wide-cut crude oil is Daqing crude oil. The main properties of this crude oil are as follows:

[0139]

[0140]

[0141] Its pyrolysis ethylene method is with embodiment 1, and concrete process parameter is as follows:

[0142] Crude oil desalting pretreatment section 1:

[0143] Inlet: The operating pressure is 0.48MPaA, and the operating temperature is 27°C;

[0144] Outlet: The operating pressure is 0.43MPaA, and the operating temperature is 27°C;

[0145] The desalination rate is 99.0%;

[...

Embodiment 3

[0175] Experimental group 2

[0176] A petroleum factory that adopts the system and method for improving the utilization rate of cracking ethylene raw materials of the present invention has an ethylene production scale of 1,000,000 tons / year, and the wide-cut crude oil is Shengli crude oil. The main properties of this crude oil are as follows:

[0177] Crude oil classification Sulfur intermediate Initial boiling point / ℃ 108 Density(20℃) / kg·m -3

923.6 Distillation rate (V) / % APIs 21.1 100℃ 0.91 Freezing point / ℃ 14 120℃ 1.05 h 2 O content / %

2.50 140℃ 2.21 Wax content / % 9.1 160℃ 3.19 Asphaltenes / % 1.42 180℃ 4.60 Colloid / % 19.90 200℃ 5.82 Carbon residue / % 7.22 220℃ 7.06 Ash / % 0.040 240℃ 8.16 Elemental analysis 260℃ 9.29 sulfur / % 1.03 280℃ 11.55 nitrogen / % 0.37 300℃ 13.82 Nickel / μg·g -1

26.38 400℃ 29.70 Vanadium / μg·g -1

1.61 500℃ 47.30 ...

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Abstract

The invention relates to a system for improving the utilization rate of cracking ethylene raw materials, including crude oil desalting pretreatment section, crude oil dehydration pretreatment section, crude oil preheating treatment section, oil stripping section, liquid cracking section, gas cracking section, quenching oil The working section, quenching water working section, compression working section and rectifying separation working section are connected by pipelines. It also relates to a method for improving the utilization rate of cracking raw materials for producing ethylene, which has the advantages of shortening the process flow for preparing cracking raw materials, carrying out simple steam stripping and distillation of wide fraction crude oil, obtaining gas phase fractions and light liquid phase fractions for separate furnace cracking, Higher reaction temperature is adopted for the gaseous phase raw material to increase the yield of ethylene, and a shorter residence time for the liquid phase raw material is adopted to increase the yield of triene and triphenyl; thus the utilization rate of crude oil is increased from 20wt% in the prior art to 22.01-49.40wt%. better technical effect.

Description

technical field [0001] The invention relates to the field of petrochemical technology, in particular to a system and a method for improving the utilization rate of cracking ethylene raw materials. Background technique [0002] The steam thermal cracking process is a typical petrochemical process widely used in the production of olefin products such as ethylene, propylene, butadiene, and aromatic products such as benzene, toluene, and xylene. horizontal sign. The cracking raw materials for producing ethylene from petroleum hydrocarbons can be gas phase fractions such as ethane, propane, butane, etc., or liquid phase fractions such as naphtha, atmospheric diesel oil, and hydrogenated tail oil. In order to obtain these cracking raw materials, the existing technology adopts oil refining equipment with complicated process flow, such as: the process flow of "three towers and two furnaces" of atmospheric and vacuum equipment, and another example: the process of "two furnaces, two ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C11/04C10G55/00
CPCC10G55/00C10G2300/4006C10G2300/4012C10G2400/02C10G2400/20
Inventor 何琨李勇董万霞王墨鲁耀吴南余超白玫
Owner SINOPEC SHANGHAI ENG
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