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Method and system for evaluating heat supply for heavy oil heat conversion

An evaluation method and thermal conversion technology, applied in the field of delayed coking, can solve the problems of complex thermal reaction behavior, difficult to characterize the influence of thermal conversion reaction characteristics, etc., and achieve the effects of easy control, simple operation, and overcoming measurement difficulties.

Inactive Publication Date: 2018-06-29
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the extremely complex composition and thermal reaction behavior of heavy oil, asphaltene, carbon residue, density, etc. are conventionally used to characterize the physical properties of heavy oil, and it is difficult to characterize the molecular structure characteristics of heavy oil, such as metal content, sulfur and nitrogen content, and colloid content. Influence of Transformation Reaction Properties

Method used

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  • Method and system for evaluating heat supply for heavy oil heat conversion
  • Method and system for evaluating heat supply for heavy oil heat conversion
  • Method and system for evaluating heat supply for heavy oil heat conversion

Examples

Experimental program
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Embodiment 1

[0040] The method for evaluating the heat supply required for thermal conversion of heavy oil in this embodiment includes the following steps:

[0041] 1. Thermal conversion of the first sample to be tested (benchmark experiment)

[0042] Two parts of 7g of the first sample to be tested (one of which is used as a reference sample) are respectively packed into two identical reactors, and the two reactors are placed in the same heater for heating, so that two parts of the first sample to be tested The heat conversion occurs in the sample; among them, the heating is carried out by a stepwise heating method, and the stepwise heating method is as follows figure 1 As shown, it specifically includes: the first stage: heating from 350°C to 430°C, the heating time is 5 minutes, and the holding time is 40 minutes; the second stage: heating from 430°C to 500°C, the heating time is 5 minutes, and the holding time is 50 minutes. After the thermal conversion is completed, the residual oil ...

Embodiment 2

[0053] The method for evaluating the heat supply required for thermal conversion of heavy oil in this embodiment includes the following steps:

[0054] 1. Thermal conversion of the first sample to be tested (benchmark experiment)

[0055] Two parts of 7g of the first sample to be tested (one of which is used as a reference sample) are respectively packed into two identical reactors, and the two reactors are placed in the same heater for heating, so that two parts of the first sample to be tested The heat conversion occurs in the sample; among them, the heating is carried out by a stepwise heating method, and the stepwise heating method is as follows figure 1 As shown, it specifically includes: the first stage: heating from 350°C to 430°C, the heating time is 5 minutes, and the holding time is 40 minutes; the second stage: heating from 430°C to 500°C, the heating time is 5 minutes, and the holding time is 50 minutes. After the thermal conversion is completed, the residual oil ...

Embodiment 3

[0066] The method for evaluating the heat supply required for thermal conversion of heavy oil in this embodiment includes the following steps:

[0067] 1. Thermal conversion of the first sample to be tested (benchmark experiment)

[0068] Two parts of 7g of the first sample to be tested (one of which is used as a reference sample) are respectively packed into two identical reactors, and the two reactors are placed in the same heater for heating, so that two parts of the first sample to be tested The heat conversion occurs in the sample; among them, the heating is carried out by a stepwise heating method, and the stepwise heating method is as follows figure 1 As shown, it specifically includes: the first stage: heating from 350°C to 430°C, the heating time is 5 minutes, and the holding time is 40 minutes; the second stage: heating from 430°C to 500°C, the heating time is 5 minutes, and the holding time is 50 minutes. After the thermal conversion is completed, the residual oil ...

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Abstract

The invention provides a method and system for evaluating heat supply for heavy oil heat conversion. The method comprises the following steps: under the same condition, simultaneously performing heatconversion on a reference sample and a first sample to be tested of a same mass so as to obtain respective residual oil yield; under the same condition, simultaneously performing heat conversion on the reference sample and a second sample to be tested of the same mass so as to obtain respective residual oil yield and modified second residual oil yield of the second sample to be tested; respectively testing residual carbon values of the first sample to be tested and the second sample to be tested so as to obtain respectively residual oil limit yield; according to the difference of the residualoil yield of the first sample to be tested and the limit yield of residual oil, and the difference of the residual oil modified yield of the sample to be tested and the limit yield of the residual oil, evaluating heat supply for heat conversion of the first sample to be tested and the second sample to be tested. By adopting the method and the system provided by the invention, heat supply for thermal conversion of heavy oil can be evaluated, and bases can be made for operation parameters of coking delay optimization processes of different raw materials.

Description

technical field [0001] The invention relates to the technical field of delayed coking, in particular to a method and system for evaluating heat supply required for thermal conversion of heavy oil. Background technique [0002] Delayed coking is a thermal cracking process whose main purpose is to convert high-carbon residual oil (heavy oil) into light oil. Delayed coking utilizes the characteristics that heavy oil is not prone to coking precursors when the thermal conversion depth is low, and obtains the heat required for the lightening of heavy oil in the coking heating furnace tube, and then completes the coking reaction in the coke tower (that is, thermal conversion / thermal reaction ). In the delayed coking process, due to the complexity and variety of raw material sources and properties, it is often necessary to readjust the process operating parameters when processing different heavy oil raw materials; at the same time, due to the complexity of the thermal conversion pr...

Claims

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Application Information

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IPC IPC(8): G01N25/00
CPCG01N25/00
Inventor 甄新平杨军卫沈国平田凌燕王兰娟熊春珠肖家治李静王华魏军许孝玲
Owner PETROCHINA CO LTD