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

A technology for petroleum refining and combination processes, which is applied in the petroleum industry, coke ovens, direct heating and dry distillation, etc., can solve the problems of low tar yield and long pyrolysis time, and achieves low economic benefits, low prices, and fast reaction temperature. Effect

Active Publication Date: 2015-09-30
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 long, resulting in a low tar yield.

Method used

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

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Embodiment 1

[0024]Jurassic coal (lignite) in a certain area in northern Shaanxi was selected, and its industrial analysis is shown in Table 1. The by-product of petroleum refining is RFCC oil slurry from a refinery. The physicochemical properties of RFCC oil 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 with a temperature of 250°C after heat exchange are fully mixed in the preheating drying zone, and the temperature of the mixture of raw coal and catalytic cracking oil slurry is is 150°C. The mixture of raw coal and catalytic cracking oil slurry is continuously fed into the microwave pyrolysis reactor at a rate of 100 g / min. The microwave frequency is 2450MHz, the pyrolysis temperature is stable at 650°C, and the carrier gas is nitrogen. The semi-coke generated by the pyrolysis reaction is collected after being cooled to normal temperature. The high-temperature gas generated by py...

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Abstract

The invention discloses a combined process for co-pyrolysis of coal and petroleum refining by-products. Feed coal is crushed, sent into a preheating drying zone, and mixed with petroleum refining by-products from a heat transfer system; and the mixture of coal and petroleum refining by-products is sent into a microwave pyrolysis reactor to generate semi coke and high temperature pyrolysis gas, the pyrolysis gas carries out heat exchange with the petroleum refining by-products in the heat transfer system and is separated into tar and low temperature pyrolysis gas, and the low temperature pyrolysis gas enters into a condenser system for further 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 for co-pyrolyzing coal and by-products of petroleum refining, in particular to a combined process for co-pyrolyzing low-modified coal and by-products of petroleum refining by using microwaves. Background technique [0002] my country is a country rich in coal, short of oil and low in natural gas. Coal accounts for about 75% of my country's primary energy, of which low metamorphic coal resources (lignite, long-flame coal, gas coal, non-sticky coal, weak sticky coal) Coal, etc.) account for more than 60% of coal resources. Because low-metamorphic coal has no caking or very poor caking, it cannot be used to produce coke in conventional coke ovens, and is generally only used as steam coal or partly 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B53/00C10B49/02C10B57/00
Inventor 张庆军翁延博蒋立敬张忠清
Owner CHINA PETROLEUM & CHEM CORP
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