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Method for microwave pyrolysis treatment of oil sludge

A sludge and pyrolysis technology, which is applied in the pyrolysis treatment of sludge, the petroleum industry, the preparation of liquid hydrocarbon mixtures, etc., can solve the problems of secondary pollution and incomplete treatment, and achieve high reliability, low coke yield, Highly processed effects

Inactive Publication Date: 2014-04-23
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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Problems solved by technology

However, these technologies have the problem of incomplete treatment or secondary pollution

Method used

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  • Method for microwave pyrolysis treatment of oil sludge

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specific Embodiment 1

[0015] The specific embodiment of the present invention is described by taking oil sludge at the bottom of a refinery oil tank as an example. Oil sludge contains 78% oil, 14% water, and the rest is solid matter.

[0016] The oil sludge is dehydrated and pretreated to remove mechanical impurities, heated to 300-350°C in a heating furnace, and then enters a pyrolysis reactor through a pipeline. The reaction temperature is 480°C, and the reaction time is 30 minutes. The reactor is externally connected with a microwave radiation device. The microwave radiation frequency is 2450MHz, and the power is continuously adjustable to 750W. The radiation time is the same as the reaction time. The pyrolysis gas enters the three-phase separator through the heating pipeline. In order to avoid the solidification of the pyrolysis gas, the temperature of the heating pipeline is higher than 350°C. The temperature of the three-phase separator is controlled by circulating water (<100°C), and the...

specific Embodiment 2

[0018] The specific embodiment of the present invention is described by taking oil sludge at the bottom of a refinery oil tank as an example. Oil sludge contains 65% oil, 24% water, and the rest is solid matter. The reaction temperature is selected as 500°C. The reaction time is 15 minutes. The microwave radiation frequency is 2450MHz, and the power is continuously adjustable to 600W. The radiation time is the same as the reaction time. After microwave pyrolysis, the conversion rate of oil sludge is 97.5%, the yield of liquid phase is 80.8%, the fraction of 350°C accounts for 36.6%. %, the gas yield is 10.2%, and the coke yield is 9%.

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Abstract

The invention discloses a method for microwave pyrolysis treatment of oil sludge. The method adopts microwave pyrolysis to treat the oil sludge and has the characteristics of simple equipment operation and high oil sludge treatment degree. The method comprises the steps of (1) pretreating the oil sludge through dehydration to remove mechanical impurities, preheating, and then delivering the oil sludge into a pyrolysis reactor provided with external microwave radiation; (2) performing thermal conversion on the input material entering the pyrolysis reactor in the reactor, wherein the reaction temperature is controlled to be 400-500 DEG C, the reaction time is controlled to be 10-30min, the microwave radiation frequency is 2450MHz, and the power is 0-750W and is continuously adjustable; and (3) introducing pyrolytic reaction gas into a three-phase separator, recycling the gas phase component at the upper part, discharging the oily sewage at the bottom into a sewage treatment system, recycling oil and delivering the oil into a storage tank for storage. The temperature preheated in a heating furnace is 300-350 DEG C. The method disclosed by the invention is low in coke yield, high in reliability and capable of realizing clean production.

Description

technical field [0001] The invention relates to a treatment method for oily sludge, in particular to a method for treating oily sludge with microwave pyrolysis. Background technique [0002] Oily sludge is an oily solid waste produced during oil extraction, transportation, refining, and oily sewage treatment. It has the characteristics of high water content, large volume, complex composition, difficult treatment, most of the harmful components exceed the discharge standard, and high calorific value. [0003] Oily sludge is huge. If it is discharged directly without treatment, it will not only occupy a large amount of cultivated land, but also produce a large amount of foul gas, polluting the surrounding soil, water, and air. After the petroleum substances in the sludge penetrate into the soil, they will stick to the soil particles. The surface affects the permeability of the soil, hinders the effective soil water-conducting pathway, reduces the soil water seepage, and reduc...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/10C10G1/00
CPCY02W10/40
Inventor 李会鹏赵华
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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