Refinery oily sludge disposal system and method

A disposal system and technology of oily sludge, applied in sludge treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problem that the total amount of sludge has not been greatly reduced, environmental and health hazards, and high disposal costs cost and other issues, to achieve the effect of convenient transportation in different places, elimination of harm to the environment, and strong adaptability to the site

Pending Publication Date: 2017-12-22
无锡雪浪康威环保科技有限公司
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Problems solved by technology

[0003] The disposal method of mechanical dehydration process is simple and mature, but the water content of the sludge after dehydration is still about 80%. Harmful germs and anaerobic microorganisms in the mud reproduce in large numbers under the condition of suitable temperature, producing malodorous gas, causing hidden dangers to the environment and health; the invention with the publication number of CN205974231U discloses a kind of oil refinery sludge drying and tail gas treatment integration Chemical treatment system, which can reduce the moisture content of oil sludge from 90% to 30%, but the sludge after drying and disposal has not reached the harmless disposal of sludge, and the sludge after drying still needs to be disposed of as hazardous waste , and the paddle-type dryer is used in this invention, which has the disadvantages of large floor area and long drying time; since the incineration process of foreign transport is a safety-sensitive area in the refinery, the use of open flames is strictly prohibited. The incineration disposal of foreign transportation will generate high disposal costs, and due to the high water content of the sludge, the incineration disposal process will lead to incomplete combustion, and the products of incomplete combustion will cause secondary pollution to the environment through tail gas

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  • Refinery oily sludge disposal system and method

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Embodiment 1

[0043] Embodiment 1: This embodiment is to repair the oily sludge in the refinery homogeneous pool with an oil content of 62300ppm, a water content of 85.20%, and a solid content of 8.57%. The sludge disposal volume is 3900t. Quality tank, add demulsifier through the dosing tank: flocculant = 0.1-1%: 0.1-0.5%, the sludge after dosing and stirring enters the decanter centrifuge for oil, water and mud three-phase separation, and the liquid content of the sludge is ≤ 80%, the degree of reduction ≥ 57%, the mud cake enters the granulation and drying machine through the high-viscosity screw conveyor, and the sludge becomes sludge particles with a particle size of 2-15mm after granulation, and the moisture content is controlled at 20-30 %, the reduction degree of sludge is ≥89%. After drying, the sludge changes from mud cake to sediment state. It enters the thermal cracking main equipment through the hoist for indirect heating. The heating temperature is 400-550°C to reduce the moist...

Embodiment 2

[0044] Embodiment 2: In this embodiment, the oil content is 140210ppm, the water content is 78.71%, the solid content is 7.269%, and the sludge at the bottom of the refinery tank is repaired. The sludge disposal volume is 3000t. Add demulsifier through the dosing tank: gel breaker: flocculant = 0.1-1%: 0.5-2%: 0.1-0.5%, the sludge after dosing and stirring enters the decanter centrifuge for oil, water and mud three-phase separation, The oil product in the tempering and centrifugal stage is ≥80%, the liquid content of the sludge is ≤75%, and the reduction degree is ≥70%. The mud cake enters the granulation and drying machine through the high-viscosity mud screw conveyor, and the sludge becomes 2 For sludge particles with a particle size of -15mm, the moisture content is controlled at 20-30%, and the reduction degree of sludge is ≥90%. After drying, the sludge changes from mud cake to sediment state, and enters the thermal cracking main equipment directly through the elevator He...

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Abstract

The present invention provides a refinery oily sludge disposal system which realizes non-hazardous treatment of oily sludge and effectively solves the problem of resource treatment and utilization of the oily sludge, the refinery oily sludge disposal system has the advantages of skid-mounted design, compact structure and small floor area, the refinery oily sludge disposal system includes an oily sludge reservoir, a quenching and tempering unit, a centrifugal processing unit, a pelletizing and drying unit, a thermal cracking unit and an exhaust gas treatment unit, the quenching and tempering unit, the centrifugal processing unit and the pelletizing and drying unit are respectively arranged on a quenching and tempering centrifugation drying integrated skid body, the exhaust gas treatment unit and the thermal cracking unit are respectively arranged on a thermal cracking exhaust gas integrated skid body, and the invention also provides a refinery oily sludge disposal method.

Description

technical field [0001] The invention relates to the field of oil sludge treatment, in particular to a treatment system and method for oily sludge in an oil refinery. Background technique [0002] Oily sludge is included in the "Hazardous Waste List" and included in hazardous waste (HW08 category) for management. Oily sludge pollution components are mainly organic compounds, mainly petroleum substances. my country's oily sludge treatment has not received enough attention In addition, there are many types of oily sludge with complex properties, and the corresponding treatment technologies and equipment are also showing a trend of diversification. Among them, oily sludge in refineries mainly comes from the three sludges of refineries, including grease trap sludge, flotation tank scum, Crude oil tank bottom sludge, etc. At present, the treatment technology of oily sludge in refineries is mainly divided into mechanical dehydration process, sludge drying process, and outbound inci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/10C02F11/12C02F11/14C02F11/00
CPCC02F11/00C02F11/10C02F11/12C02F11/127C02F11/14Y02W10/40
Inventor 李朝廷杨建平周琴涛聂华陆丹枫张建强
Owner 无锡雪浪康威环保科技有限公司
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