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Device and method for directly heating and cracking petroleum hydrocarbons by hydrogen-oxygen combustion method

A technology of petroleum hydrocarbon and combustion method, which is applied in the field of petroleum hydrocarbon cracking, which can solve the problems of poor process control and increased cost, and achieve the effect of avoiding heat transfer process, avoiding over-cracking or incomplete cracking

Inactive Publication Date: 2018-04-24
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology requires a multi-stage hydrogen catalytic combustion device and an adiabatic reaction device to be connected in series to increase the yield of olefins, and the hydrogen combustion requires the help of a catalyst, which will inevitably increase the cost and the process is not easy to control

Method used

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  • Device and method for directly heating and cracking petroleum hydrocarbons by hydrogen-oxygen combustion method
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  • Device and method for directly heating and cracking petroleum hydrocarbons by hydrogen-oxygen combustion method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] The pyrolysis of embodiment 1 light oil oil

[0085] The cracking raw material used in this example is light diesel oil produced by Fischer-Tropsch synthesis of Zhongke Synthetic Oil Technology Co., Ltd., with a boiling point cutoff temperature of 150-280°C, an initial boiling point of 125°C, a 5% distillation temperature of 150.8°C, and a 95% distillation temperature of 302.4 °C, the final boiling point is 323.4 °C. The cracking method and device used in this example are as described above.

[0086] In this example, under the conditions shown in Table 1, the pyrolysis raw materials are subjected to pyrolysis. The cracking results of this embodiment are shown in Table 2.

[0087] The pyrolysis condition of table 1 embodiment 1

[0088]

[0089] The pyrolysis result of table 2 embodiment 1

[0090]

[0091]

[0092] It can be seen from Table 2 that with the increase of superheated steam temperature, the formation rate of light olefins (ethylene, propylene) i...

Embodiment 2

[0093] Example 2 High temperature cracking of waste polyolefin mild cracking liquid product

[0094] The cracking raw material used in this example is a fraction with a boiling point -1 , Constant temperature residence time 40 ~ 90min. The liquid product obtained by mild cracking is distilled to obtain fractions with a boiling point <380°C. The pyrolysis system used in this embodiment is the same as in Example 1.

[0095] In this embodiment, under the conditions shown in Table 3, the pyrolysis raw materials are subjected to pyrolysis. The cracking results of this embodiment are shown in Table 4.

[0096] The pyrolysis condition of table 3 embodiment 2

[0097]

[0098] The pyrolysis result of table 4 embodiment 2

[0099]

[0100] It can be seen from Table 4 that the gas oil is mixed with the light fraction of polyolefin cracking products for cracking. A better cracking effect can be obtained, which shows that the device and method have a wide range of application. ...

Embodiment 3

[0101] Example 3 High-temperature pyrolysis of waste polyolefin mild cracking waxy product and light diesel oil mixture

[0102] The cracking raw material used in this example is a mixture of viscous soft solid paraffin and light diesel oil obtained by mild cracking of high-density polyethylene in a certain proportion. A 1L closed reactor is used for mild cracking, the cracking temperature is set at 400°C, and the heating rate is 3-5°C·min -1 , constant temperature residence time. The light diesel oil and pyrolysis system used in this embodiment are the same as those in Embodiment 1.

[0103] In this embodiment, under the conditions shown in Table 5, pyrolysis of the cracking raw materials is carried out. The cracking results of this embodiment are shown in Table 6.

[0104] The pyrolysis condition of table 5 embodiment 3

[0105]

[0106] The pyrolysis result of table 6 embodiment 3

[0107]

[0108] It can be seen from Table 6 that the cracking is carried out by m...

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Abstract

The invention relates to the field of petroleum hydrocarbon pyrolysis, and concretely relates to an apparatus and method for directly heated pyrolysis of petroleum hydrocarbon by an oxyhydrogen combustion method. The apparatus comprises an oxyhydrogen combustor (1-3) and a high-temperature pyrolysis reaction apparatus (1-1), and the oxyhydrogen combustor (1-3) communicates with the high-temperature pyrolysis reaction apparatus (1-1), wherein the high-temperature pyrolysis reaction apparatus (1-1) comprises a high-temperature pyrolysis reactor (2-1), and the high-temperature pyrolysis reactor (2-1) comprises a mixer (2-1a) and a reactor (2-1b) which are connected in up and down connection; two opposite sidewalls of the mixer (2-1a) are respectively provided with a superheated water vapour inlet (3-1) and a gas-liquid mixed material inlet (3-3) at tangential directions, and the top part of the mixer (2-1a) is provided with a gaseous state material inlet (3-2) at an axial direction. The tangential or axial direction mixing mode of superheated water vapour and materials is used, so that over pyrolysis or incomplete pyrolysis due to uneven mixing is effectively avoided.

Description

technical field [0001] The invention relates to the field of cracking petroleum hydrocarbons, in particular, the invention relates to a device and method for directly heating and cracking petroleum hydrocarbons by a hydrogen-oxygen combustion method. Background technique [0002] Thermal cracking of petroleum hydrocarbons is currently the mainstream method for producing small molecule olefins. High reaction temperature and short residence time are beneficial to increase the yield of olefins and reduce the formation of by-products, which requires a very high intensity heat supply for the cracking reaction. From the perspective of heat transfer, thermal cracking can be divided into direct heating pyrolysis (Directly heated pyrolysis) and indirect heating pyrolysis (Indirectly heated pyrolysis). The heat transfer medium (reaction tube wall) transfers heat to the cracking raw material. The steam cracking (Steamcracking) technology using a tubular cracking furnace is a typical ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G9/36
Inventor 温浩景晓东赵月红许志宏
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI