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A harmless integrated treatment method for oily sludge

A treatment method and sludge technology, applied in sludge treatment, biological sludge treatment, water/sludge/sewage treatment, etc., can solve the problems of polluted soil, water body and vegetation, difficulty in post-treatment system, waste of oil resources, etc. , to achieve the effect of saving energy, reducing secondary pollution of the environment, and running stable and low

Active Publication Date: 2020-02-07
江苏康泰环保装备有限公司
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Problems solved by technology

[0004] Refining and chemical enterprises produce a large amount of oily sludge in the process of petroleum refining and wastewater treatment. After mechanical dehydration, these oily sludges belong to a stable multiphase system with sufficient emulsification and high viscosity, which brings great pressure to the post-treatment system. It is very difficult. At present, the treatment of oily sludge often adopts the method of open-air stacking or landfill, but in oily sludge, it generally contains hydrocarbon compounds, benzene series, phenolic compounds, etc., and is accompanied by stench. If Direct discharge will pollute soil, water and vegetation, and it is also a waste of petroleum resources

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  • A harmless integrated treatment method for oily sludge

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Embodiment 1

[0035] see figure 1 , a harmless integrated treatment method for oily sludge, comprising the following steps:

[0036] (1) Primary dehydration:

[0037] The sludge with a water content of 97-98% in the sludge thickening tank is lifted into the screw stack sludge dehydrator through a pump, and a flocculant accounting for 3-5% of the total weight of the sludge is added to the sludge. The composition is as follows: 25 parts by weight of sodium carbonate, 11 parts by weight of sodium metaaluminate, 8 parts by weight of NOC-1 flocculant, and 30 parts by weight of aluminum sulfate. The flocculant is composed of inorganic flocculant and microbial flocculant. The microbial flocculant has strong flocculation activity and can be used for the treatment of expanded sludge. It is easy to use and has little secondary pollution. The composite flocculant makes the sludge form large particle flocs, and under the action of mechanical extrusion, most of the free water and adsorbed water are se...

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Abstract

The invention discloses a harmless integrated treatment method of oily sludge. The method comprises steps as follows: (1) primary dewatering; (2) biological leaching modification; (3) deep dewatering;(4) low-temperature drying; (5) low-temperature pyrolysis. After the oily sludge is treated at the process stages, separated water is totally recovered to a sewage treatment system for purification treatment; organic carbon formed by sludge is discharged and serves as a new material for secondary utilization or combustion treatment. Heat produced in the process is totally returned to the system for recycling, and reduction, stabilization, harmless treatment and recycling of the oily sludge are thoroughly realized.

Description

technical field [0001] The invention relates to a petrochemical oily sludge harmless integrated treatment system and method, especially for the reduction of oily scum, pool bottom sludge, tank bottom sludge, biochemical sludge, etc. produced in the sewage treatment process of the petrochemical industry recycling, recycling and harmless disposal methods. Background technique [0002] The petrochemical industry usually produces a large amount of sludge during the sewage treatment process because the sewage contains a lot of organic matter such as oil, mainly including tank bottom sludge, grease trap bottom sludge, oily scum, biochemical sludge, etc. At present, the sludge produced by the petrochemical refinery industry has been listed as oily waste in the "National Hazardous Waste Catalog" (No. The Environmental Pollution Prevention Law also requires that oily sludge must be treated in a harmless manner. [0003] Among the sewage treatment plants that have been built in my c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/125C02F11/148C02F11/02C02F11/13C02F11/10C02F103/36
CPCC02F11/02C02F11/10C02F11/12C02F11/125C02F11/14C02F11/18C02F2103/365Y02W10/40
Inventor 花成巍黄华
Owner 江苏康泰环保装备有限公司
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