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A combined process for co-pyrolysis of coal and petroleum refining by-products

A petroleum refining and combined process technology, which is applied in the petroleum industry, coke ovens, special forms of dry distillation, etc., can solve the problems of low tar yield and long pyrolysis time, and achieve low economic benefits, low prices, and fast reaction temperature. Effect

Active Publication Date: 2016-08-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because coal is a microwave weak absorbing substance, the pyrolysis time is too long and the tar yield is low

Method used

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  • A combined process for co-pyrolysis of coal and petroleum refining by-products

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Effect test

Embodiment 1

[0026]Jurassic coal (lignite) from a certain area in northern Shaanxi is selected, and its industrial analysis is shown in Table 1. The by-products of petroleum refining were selected as RFCC slurry from a refinery. The physicochemical properties of the RFCC slurry are shown in Table 2. According to the mass ratio of 3:7, the raw coal with a certain particle size (5-50mm) and the catalytic cracking oil slurry are fully stirred and mixed in the preheating and drying zone, and then preheated. The temperature of the preheated raw coal and catalytic cracking oil slurry mixture is 150°C. The feedstock coal and catalytic cracking slurry mixture were continuously fed into the microwave pyrolysis reactor at a rate of 100 g / min. The microwave frequency was 2450MHz, the pyrolysis temperature was stable at 650°C, the carrier gas was nitrogen, and the carrier gas flow rate was 0.2L / min. The semi-coke generated by the pyrolysis reaction is collected after being cooled to normal temperatu...

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Abstract

The invention discloses a combined process for co-pyrolysis of coal and petroleum refining by-products. Feed coal is mixed with petroleum refining by-products a preheating drying zone; the preheated mixture of coal and petroleum refining by-products is sent into a microwave pyrolysis reactor to generate the semi coke and pyrolysis gas; and the pyrolysis enters into a condenser system for separation into tar and coal gas. The combined process can realize simultaneous pyrolysis of coal and petroleum refining by-products in the same temperature range to generate synergistic effect, so as to increase the yield of coal tar and improve the quality of coal tar.

Description

technical field [0001] The invention belongs to the technical field of coal pyrolysis, and relates to a combined process of co-pyrolysis of coal and petroleum refining by-products, in particular to a combined process of microwave co-pyrolysis of low-metamorphic coal and petroleum refining by-products. Background technique [0002] my country is a country rich in coal, lacking in oil, and lacking in natural gas. Coal accounts for about 75% of primary energy in my country. Coal, etc.) account for more than 60% of coal resources. Because low-metamorphic coal has no or poor cohesiveness, it cannot be used in conventional coke ovens to produce coke. Generally, it is only used as steam coal or partially used to produce low-calorific value producer gas. Low-metamorphic coal contains a large amount of hydrogen-rich components, and the direct combustion of coal wastes the potential hydrogen-rich components in coal that can be converted into oil, gas and chemicals with high added valu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B53/00C10B57/04C10B57/00
Inventor 张庆军翁延博蒋立敬张忠清彭绍忠
Owner CHINA PETROLEUM & CHEM CORP
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