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Method for recovering crude oil in petroleum oil sludge and comprehensively recycling residual mud and sand

A technology for resource utilization and sludge, applied in chemical instruments and methods, petroleum industry, sludge treatment, etc., can solve the problems of secondary air pollution, coking combustion of sludge, waste of resources, etc., to avoid waste, reduce viscosity, and make full use of Effect

Inactive Publication Date: 2016-06-01
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, oil sludge, which has always been regarded as a waste, is not only a waste of resources, but also because of the viscosity of the oil sludge itself, it is easy to cause coking during the incineration process, which makes the combustion insufficient and produces poisonous and harmful substances. The secondary pollution of the gas to the atmosphere is also more serious

Method used

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  • Method for recovering crude oil in petroleum oil sludge and comprehensively recycling residual mud and sand

Examples

Experimental program
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Effect test

Embodiment 1

[0032] A method for recovering crude oil in petrochemical sludge and utilizing mud and sand resources, the steps of which are:

[0033] (1) Pretreatment of petrochemical sludge (I), bake the sludge at 105°C for 24 hours to constant weight, and measure its calorific value. Described oil sludge uses oxygen bomb type calorimeter to measure its calorific value, and concrete steps are as follows:

[0034] ① Fill the outer barrel with water (about 18kg);

[0035] ② Weighing: Weigh a certain quality sample (accurate to 0.0002g) and put it into a combustion dish;

[0036] ③ Install the ignition wire: put the oxygen bomb cover on the bullet bracket, take an ignition wire about 10cm long, put the ignition wire in good contact with the sample, and hang the two ends on two ignition wire rods with diagonal seams (one of the rods is also a combustion dish bracket), and lock it with a small locking sleeve;

[0037] ④ Oxygenation: Add 10ml of distilled water into the oxygen bomb, tighten t...

Embodiment 2

[0045] A method for recovering crude oil in petrochemical sludge and utilizing mud and sand resources, the steps of which are:

[0046] A. Mix 10g of oil sludge with 80g of 1,2-dichloroethane, and stir at 40°C for 10min at a speed of 20r / s.

[0047] B. Filtrate for 20 minutes after stirring, recover the organic solvent by distillation, and obtain the separated crude oil at the same time;

[0048]C. The oil sludge in the raffinate phase is fully mixed with the municipal sludge ash at a ratio of 1:2. The experiment can be obtained: the recovery rate of organic solvent is 96%, the recovery rate of crude oil is 43%, the calorific value of the remaining sludge is 24111J / g, and the calorific value of the mixed sludge is 7929J / g.

[0049] Other steps are the same as in Example 1.

Embodiment 3

[0051] A method for recovering crude oil in petrochemical sludge and utilizing mud and sand resources, the steps of which are:

[0052] A. Mix 10g of oil sludge with 80g of ethyl acetate, and stir at 35°C for 10min at a speed of 20r / s.

[0053] B. Filtrate for 20 minutes after stirring, recover the organic solvent by distillation, and obtain the separated crude oil at the same time;

[0054] C. The oil sludge in the raffinate phase is fully mixed with the municipal sludge ash at a ratio of 1:2. The experiment can be obtained: the recovery rate of organic solvent is 95%, the recovery rate of crude oil is 52%, the calorific value of the remaining sludge is 21643J / g, and the calorific value of the mixed sludge is 8192.3J / g.

[0055] Other steps are the same as in Example 1.

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Abstract

The invention discloses a method for recovering crude oil in petroleum oil sludge and recycling residual mud and sand. The method comprises the steps of A, pretreatment-crude oil extraction-co-incineration: drying the oil sludge to a constant weight at a certain temperature and measuring a heat value of the oil sludge; B, a crude oil extraction process: mixing the oil sludge with an organic solvent according to a certain weight ratio, stirring at a certain temperature, and filtering to obtain oil phase and raffinate phase oil sludge; C, an organic solvent recovery process: selecting a boiling point of the organic solvent, recovering the organic solvent at 100 DEG C under the normal pressure through a distillation recovery device, and recycling the organic solvent; and D, a co-incineration process: drying the raffinate phase oil sludge, mixing the dried raffinate phase oil sludge with municipal sludge ash according to a certain ratio, measuring a heat value of a mixture, and performing incineration at 800-1,000 DEG C. The method is easy to implement and simple and convenient to operate; the crude oil subjected to extraction is recycled; the residual raffinate phase oil sludge still can take effects and is subjected to co-incineration together with the municipal sludge ash; and the heat value of the oil sludge is fully utilized.

Description

technical field [0001] The invention relates to the field of oil sludge treatment, and more specifically relates to a method for recovering crude oil in petrochemical oil sludge and utilizing the remaining mud and sand resources. It is suitable for heavy oil with poor fluidity, high viscosity, high colloid and asphaltene content, and longer storage time. A type of sludge with a larger proportion of ingredients. Background technique [0002] The total oil production in the world today is about 2.2 billion tons per year, of which 1.75 billion tons are produced by land oil fields. Due to various reasons, a large number of production facilities used for onshore oil production will directly or indirectly leak crude oil on the ground. Only the ground crude oil, the annual output of a single well can be as high as 2 tons. According to statistics, 8 million tons of oil enter the environment every year in the world, and nearly 600,000 tons of oil enters the environment every year in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C02F11/12C10G1/04
CPCC02F11/00C02F11/002C02F11/12C10G1/04
Inventor 李进平胡洁琼王光坤龚翊敏伍亮甘金华
Owner WUHAN TEXTILE UNIV
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