Harmless treatment method of oil-containing sludge

A treatment method and sludge technology, applied in sludge treatment, water/sludge/sewage treatment, dehydration/drying/concentrated sludge treatment, etc., can solve the problem of high organic content in solid phase, high energy consumption, oily pollution The problem of too much mud, etc., can achieve the effect of strong extraction capacity, reduced energy consumption and low extraction temperature.

Active Publication Date: 2014-04-02
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology does not carry out deep dehydration treatment on the oily sludge before extraction. During the process, there is too much water in the oily sludge, the extraction is not thorough, and the organic content in the separated solid phase is high, and the material needs to be heated during the extraction process. , requires multi-stage extraction, long process flow, many equipment, large equipment investment, and large energy consumption
[0007] CN101633574A and CN101362979A propose a treatment method for oily sludge, which involves conditioning and filtering the oily sludge and mixing it with coal as fuel, but fails to recycle the oil in the oily sludge
However,

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0031] Example 1:

[0032] The solvent formula is as follows: the main agent is distillate oil with a boiling range of 110-125°C, accounting for 90% (v / v), and the auxiliary agent is a distillate with a boiling range of 140-150°C, accounting for 7% (v / v). / v), distillate oil with auxiliary boiling range of 80-100℃, accounting for 3.0% (v / v), constitutes a composite extractant. The oily sludge with a moisture content of 90% and an oil content of 5% produced by a company is sent to the greenhouse drying room, and placed under sufficient sunlight for 20 days. Every other day, the sludge is turned over by a mud turner. , and keep the drying room well ventilated, the moisture content of the final mud cake is 35%, and the oil content is 32%, and then 1kg mud cake and mixed solvent are mixed and extracted at a mass ratio of 1:8 for 30 minutes, and the extraction temperature is 30 ℃. After the extraction, the solid-liquid mixture is sent to the centrifugal separator, the separated li...

Example Embodiment

[0035] Example 2:

[0036] The solvent formula is as follows: the main agent is distillate oil with a boiling range of 110-125°C, accounting for 95% (v / v), and the auxiliary agent is a distillate with a boiling range of 140-150°C, accounting for 4% (v / v). / v), the distillate oil with auxiliary boiling range of 80-100℃, accounting for 1.0% (v / v), constitutes a composite extractant. The oily sludge with a moisture content of 85% and an oil content of 7% was sent to the greenhouse drying room, and placed in the condition of sufficient sunlight for 15 days. Every other day, the sludge was turned over with a mud turner and kept dry. The chemical room is well ventilated, and the final mud cake has a moisture content of 34.2% and an oil content of 45.2%. Then take 1kg of mud cake and mixed solvent, mix and extract 10 minutes at a mass ratio of 1:10, and the temperature is 45 °C. After the extraction, The solid-liquid mixture is sent to the centrifugal separator, the separated liquid...

Example Embodiment

[0039] Example 3:

[0040] The solvent formula is as follows: the main agent is distillate oil with a boiling range of 110~125℃, accounting for 96% (v / v), and the auxiliary agent is a distillate oil with a boiling range of 140~150℃, accounting for 3% (v / v). / v), the distillate oil with auxiliary boiling range of 80-100℃, accounting for 1.0% (v / v), constitutes a composite extractant. The oily sludge with a moisture content of 70% and an oil content of 10% will be sent to the greenhouse drying room, and placed in sufficient sunlight for 20 days. Every 0.5 days, the sludge will be turned over by a mud turner and kept dry. The chemical room is well ventilated, and the final mud cake has a moisture content of 15% and an oil content of 47%. Then take 1kg of mud cake and mixed solvent, mix and extract 30 minutes at a mass ratio of 1:10, and the temperature is 45 °C. After the extraction is completed, The solid-liquid mixture is sent to the centrifugal separator, the separated liquid...

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PUM

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Abstract

The invention relates to a treatment method of oil-containing sludge. The treatment method is especially suitable for the oil-containing sludge produced in sewage treatment processes of an oil refinery. The method includes feeding the oil-containing sludge to a greenhouse desiccation room, desiccating naturally under conditions of full sunshine, mixing mud cake with an extracting agent at room temperature, performing homogeneous extraction, feeding the material mixture to a solid-liquid centrifugal separator after the extraction is finished, and directly recycling separated liquid. Separated solid residue, after being dried, is mixed with coal and the mixture can be used as fuel for coal-fired boiler. According to the method, energy consumption for treatment of the oil-containing sludge is low, the technology process is short, the equipment investment is low and harmless treatment of the oil-containing sludge can be achieved.

Description

technical field [0001] The invention relates to a harmless treatment method for oily sludge, in particular to a treatment method in which the oily sludge produced by an oil refinery or an oil refinery sewage treatment plant is dried and extracted in a solar greenhouse, and the extracted product is directly smelted back. Background technique [0002] Refining and chemical enterprises produce a large amount of oily sludge in the process of petroleum refining and wastewater treatment, which mainly come from grease traps, flotation tanks, excess activated sludge, crude oil dehydration tanks, oil storage tanks and waste oil tanks. These sludges are complex in composition and belong to a relatively stable multi-phase system with sufficient mixing and high viscosity. It is difficult for the solid phase to settle completely, and it is difficult to treat oily sludge. At present, in my country's petrochemical industry, an average of 800,000 tons of oily sludge is produced every year. ...

Claims

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Application Information

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IPC IPC(8): C02F11/00C02F11/12C10L5/46
CPCY02E50/30Y02E50/10Y02W10/37
Inventor 杨岳刘发强刘光利任立鹏贾媛媛周霞何琳张媛巫树锋李常青江岩王军
Owner PETROCHINA CO LTD
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