Method for combination processing heavy oil by pyrolysis and gasification

A processing method and thermal cracking technology, applied in the direction of non-catalytic thermal cracking, cracking, petroleum industry, etc., can solve the problem that coke is difficult to find a buyer's market, and achieve the effect of saving equipment investment and improving heat utilization efficiency

Active Publication Date: 2009-06-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, the supply of inferior and heavy oil is abundant, and the coke produced by this oil is difficult to find a buyer's market

Method used

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  • Method for combination processing heavy oil by pyrolysis and gasification

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] As shown in Figure 1, the diameters of the gas-solid separation zone, thermal cracking zone, and gasification zone are 120mm, 160mm, and 100mm respectively, and the total height is 11.1m. The experiment is carried out in a reactor, and the height ratio of the three sections is 0.6:9.5: 1. The bottom of the gas-solid separation zone is equipped with an atomizer, and the atomizer is a circular tube with A small hole of about 1mm. Using VR-1 as the raw material, the properties of the raw material oil are shown in Table 1. The temperature of each section of the reactor is heated to a predetermined temperature (see Table 2), and water vapor is introduced from the bottom of the gasification section to expel the air or oxygen in the reactor, so that the oxygen content in the entire reactor is reduced to zero. Turn on the raw material oil pump, adjust the flow rate to 600g / h, open the oxygen valve after 60 seconds, gradually adjust the oxygen flow rate to 135L / h (standard st...

Embodiment 2

[0032] The experiment was carried out in the same reactor as in Example 1, with VR-2 as the raw material, and the properties of the raw material oil are shown in Table 1. The temperature of each section of the reactor is heated to a predetermined temperature (see Table 2), and water vapor is introduced from the bottom of the gasification section to expel the air or oxygen in the reactor, so that the oxygen content in the entire reactor is reduced to zero. Turn on the raw material oil pump, adjust the flow rate to 600g / h, open the oxygen valve after 60 seconds, gradually adjust the oxygen flow rate to 140L / h (standard state), and adjust the water vapor flow rate to 462g / h. See Table 2 for other operating conditions, Table 2 for product distribution, Table 3 for ash properties, and Table 4 for gas composition.

Embodiment 3

[0034] The experiment was carried out in the same reactor as in Example 1, with VR-3 as the raw material, and the properties of the raw material oil are shown in Table 1. The temperature of each section of the reactor is heated to a predetermined temperature (see Table 2), and water vapor is introduced from the bottom of the gasification section to expel the air or oxygen in the reactor, so that the oxygen content in the entire reactor is reduced to zero. Turn on the raw material oil pump, adjust the flow rate to 650g / h, open the oxygen valve after 60 seconds, gradually adjust the oxygen flow rate to 145L / h (standard state), and adjust the water vapor flow rate to 465g / h. See Table 2 for other operating conditions, Table 2 for product distribution, Table 3 for ash properties, and Table 4 for gas composition.

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Abstract

The invention relates to a heavy oil processing method by combining thermal cracking and gasification. A raw material is conducted to a reactor from the bottom of a gas-solid separation region, is dispersed into oil drops through an atomizer; a lightweight component of the oil drop is volatilized to form oil gas in the falling process of the oil drops in a thermal cracking region; a heavy component is condensed to form coke, wherein the oil gas carries out thermal cracking reaction; coke particles drop into a gasification region and carry out gasification reaction at a temperature of between 800 and 1,600 DEG C to generate synthetic gas; one part of residual fine coke particles drop into an ash hopper to form clinker; the other part of the residual fine coke particles and the generated gas flow upwards together, are contacted with the descending liquid drops and carry out heat exchange; gas phase and coke in the gas-solid separation region of the upper part of the rector are separated; the separated fine coke particles re-drop into the thermal cracking region and the gasification region and continuously react; and the separated gas phase flows out of the rector, enters a subsequent separation system and is separated into synthetic gas, dry gas, liquid gas, gasoline, diesel, oil slurry and other products. The method has high gasification efficiency and reasonable utilization of heat energy and reduces energy consumption.

Description

technical field [0001] The invention relates to a heavy oil processing method, more specifically, relates to a method for generating synthesis gas, dry gas and light oil products through the combined processing of heavy oil thermal cracking and gasification. Background technique [0002] The global oil supply is becoming increasingly tense, and the price of crude oil is hovering at a high level. How to make good use of limited disposable resources has become the main object of consideration for researchers in this field. From the perspective of crude oil quality, some have high hydrogen / carbon ratio, low impurity content, and are relatively easy to process, but such oil resources are scarce and the market price is high; some have low hydrogen / carbon ratio, sulfur, nitrogen, nickel, vanadium, etc. The content of foreign elements is high, and the processing process is complicated, which is generally not welcomed by refineries, so the price of this kind of inferior oil is relat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G9/00C10B57/00
Inventor 吴治国龙军汪燮卿张久顺谢朝钢侯栓弟
Owner CHINA PETROLEUM & CHEM CORP
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