Heavy oil thermal conversion and green coke gasification method and integrated device

A combined device, thermal conversion technology, applied in non-catalytic thermal cracking, granular/powder fuel gasification, cracking, etc., can solve the problems of high temperature and unfavorable light oil yield.

Active Publication Date: 2013-12-18
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the heat carrier after gasification is 900-950°C, which is directly used for cracking reaction, and the temperature is high, which is not conducive to the yield of light oil products.

Method used

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  • Heavy oil thermal conversion and green coke gasification method and integrated device

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Experimental program
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Effect test

Embodiment 1

[0039] use figure 1 In the device shown, the raw material oil is vacuum residue oil, the residual carbon is 9wt%, and the heat carrier is completely inert non-porous silica particles with a particle size range of 40-120 μm. The vacuum residue is preheated to 300°C and enters the fast bed 16, where it contacts and reacts with the fluidized silicon oxide particles. The temperature in the bed is maintained at 520°C, and the apparent gas velocity is 1.1-1.8m / s. The superficial gas velocity is 3.5-5m / s, the silicon oxide and oil and gas enter the settler 1, and the oil and gas 20 are produced at the top. The silicon oxide particles are removed by the stripper 3 and the residual oil and gas are removed all the way through the inclined pipe 11 to return to the fast bed 16, and all the way through the vertical Pipe 7 enters the gasification reactor 6, and the bottom of the gasification reactor is fed with a mixed gas of oxygen and water vapor, with a volume ratio of 1:2.5, and the syn...

Embodiment 2

[0041] use figure 1 In the device shown, the raw material oil is hard pitch, the residual carbon is 27wt%, and the heat carrier is completely inert non-porous silica particles with a particle size range of 40-120 μm. The raw material is preheated to 380°C and enters the fast bed 16, where it contacts and reacts with the fluidized silicon oxide particles. The temperature in the bed is maintained at 560°C, the apparent gas velocity is 1.4-1.6m / s, and the apparent gas in the riser 10 is maintained. At a speed of 4-6m / s, the silicon oxide and oil and gas enter the settler 1, and the oil and gas 20 are produced at the top. The silicon oxide particles are removed by the stripper 3 and the residual oil and gas are removed all the way through the inclined pipe 11. Return to the fast bed 16, and enter through the standpipe 7 all the way. Gasification reactor 6, the bottom of the gasification reactor is fed with a mixed gas of oxygen and water vapor, with a volume ratio of 1:2.5, and th...

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Abstract

The invention relates to a method and an integrated device for heavy oil thermal conversion and green coke gasification. The device comprises a fast bed heat cracking reactor, a precipitator, a stripper and a fluidized bed gasification reactor. Raw oil contacts heat carrier particles in the fast bed heat cracking reactor to generate an oil-gas product and heat carrier particles with coke attached on surfaces; the oil-gas product and the heat carrier particles enter the precipitator and the stripper from a raising pipe, and after stripping, one part of the heat carrier enters the fast bed heat cracking reactor; the other part enters the lower part of the fluidized bed gasification reactor and is mixed with the heat carrier in the bed, under the effects of water vapor and an oxygen-containing gas, the coke on the heat carrier surface undergoes combustion and gasification reaction with the water vapor and an oxygen, and the heat carrier enters the fast bed heat cracking reactor; two streams of hear carrier and the heat carrier in the bed are mixed, and the mixture and the raw oil undergoes contact reaction again to finish circulation. With the device and the method, raw oil and a lot of heat carriers can undergo contact reaction at a moderate temperature, the yields of dry gas and coke are reduced and the light oil yield is improved.

Description

technical field [0001] The invention relates to a petroleum refining process, in particular to a method and a coupling device for fluidized thermal conversion of heavy oil and coke gasification. Background technique [0002] Utilize hot solid heat carrier to contact with heavy oil to realize thermal conversion of heavy oil and produce light oil and coke. It was first developed and industrialized by Exxon Company, namely fluidized coking technology. gist. The application of fluidized coking to produce powder coke products has great limitations. Therefore, Exxon Company later proposed a fluidized coking + coke gasification process, namely flexible coking technology. , US4269696A, US18343580 and a series of documents and Chinese patent application CN97182246.8 disclose flexible coking technology and various improvement methods. The process is as follows: using hot coke particles in one fluidized bed to thermally crack the raw material oil, then partially gasifying the coke pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G9/32C10J3/54C10J3/56
Inventor 白跃华周华群张兆前陈静董卫刚王苑梅建国
Owner PETROCHINA CO LTD
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