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Method for solidifying heavy metals in oil sludge

A heavy metal, solidified oil technology, applied in chemical instruments and methods, combustion methods, incinerators, etc., can solve problems such as groundwater, secondary pollution of soil, reduced environmental benefits of sewage treatment facilities, threats to environmental safety and public health, etc. The effect of good modification effect, reduction of disposal cost and low equipment operation cost

Inactive Publication Date: 2019-04-05
北京净界新宇环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

More importantly, without effective treatment and disposal, it is very easy to cause secondary pollution to groundwater, soil, etc., directly threatening environmental safety and public health, and greatly reducing the environmental benefits of sewage treatment facilities

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The methods of solidifying heavy metals in oil sludge mainly include mechanical dehydration, mixing, screw conveying, solidification reaction tank and heavy metal treatment.

[0023] Mechanical dehydration: Firstly, the oil sludge is pretreated by chemical conditioning, flocculant is added after the pretreatment, and then the dehydration system formed by the combination of dehydration equipment is used to mechanically dehydrate the oil sludge, and the moisture content of the oil sludge is controlled between 80%-85%. between. Sludge mechanical dehydration generally needs to be pretreated, the main purpose is to improve its dehydration performance and reduce operating costs; the main methods of pretreatment include chemical conditioning, heat treatment, freezing and elutriation, etc., generally by adding flocculant Chemical conditioning method, dehydration mechanical equipment generally includes belt filter press, vacuum filter, centrifugal dehydrator, screw dehydrator, e...

Embodiment 2

[0040] The difference between this embodiment and Example 1 is that the preparation method of the curing agent is as follows: the biological enzyme curing agent is diluted 40 times with water, and then adding mass ratio is 7% solid CaCl2 and 7% acidified water glass, heated to 45 ℃ Between, the reaction time is 40min. The curing agent has a good curing effect. After diluting the existing biological enzyme curing agent with water, if too much water is added, the curing effect will be affected. 40 times of dilution can achieve the best dilution effect, and the amount of adding CaCl2 and acidified water glass is too small It directly affects the curing effect, or even curing failure, but adding too much will also affect the curing and make the curing uneven. The amount used in this example is the amount with the best curing effect of the curing agent. In addition, the heating temperature is 45°, and the reaction time is 40 minutes, which is the highest material activity, the fast...

Embodiment 3

[0042] The difference between this embodiment and Example 1 is that the preparation method of the curing agent is as follows: the biological enzyme curing agent is diluted 50 times with water, then adding mass ratio is 8% solid CaCl2 and 8% acidified water glass, heated to 45 ℃ Between, the reaction time is 45min. The curing effect of the curing agent in this embodiment is better, and the curing effect of this component is better than that of the curing agent in Example 1. The reason is that after the biological enzyme curing agent is diluted with more solutions, it provides better water dilution for solid CaCl2 and acidified water glass. In the process of supporting the curing agent, the formed curing agent has a good activation effect. After adding oil sludge, the curing efficiency can be improved.

[0043] The curing agent is often used to prepare the pavement base material, and then add polypropylene fiber and mix to obtain the pavement base material. Applying it to the ...

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PUM

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Abstract

The invention discloses a method for solidifying heavy metals in oil sludge. The method comprises the following steps: firstly, pretreating the oil sludge by virtue of a chemical regulation method, adding flocculant after the pretreatment, and then mechanically dehydrating the oil sludge by adopting a dehydration system formed by combining dehydration devices to control the water content of the oil sludge between 80 percent to 85 percent; and sending the dehydrated oil sludge into a mixing reaction tank, adding a solidifying agent by using a dry powder feeding machine, conveying the semi-solidified oil sludge by a screw conveyor, conveying the solidified oil sludge by the screw conveyor into a solidification reaction tank, and adding a solidifying agent into the solidifying reaction tank at the same time. According to the method for solidifying the heavy metals in the oil sludge disclosed by the invention, after the oil-containing sludge is solidified, the treatment cost of petrochemical enterprises can be reduced, the cost can be reduced, and the recycling of the oil-containing sludge can be facilitated.

Description

technical field [0001] The invention belongs to the technical field of oil sludge treatment, and in particular relates to a method for solidifying heavy metals in oil sludge. Background technique [0002] Petrochemical sludge, also known as the "three muds" of petrochemical enterprises (grease trap bottom sludge, flotation tank scum and residual activated sludge), usually contains a large amount of organic matter, hydrocarbons, oils, high moisture content, and large volume. The oil storage tank bottom sludge, grease trap bottom sludge and flotation tank scum in the "three muds" of petrochemical enterprises belong to oily sludge, and the composition of these oily sludge is different. Oily sludge is an emulsified system that is firmly bonded together by petroleum hydrocarbons, colloids, asphaltene, sand, inorganic flocs, organic flocs, water and other organic and inorganic substances. According to the "National Hazardous Waste List" promulgated and implemented in 2016, oily s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C02F11/14C02F11/121C02F11/02F23G7/00C02F101/20C02F103/36
CPCC02F11/00C02F11/02C02F11/121C02F11/14C02F2101/20C02F2103/365C02F2303/02C02F2303/06F23G7/00
Inventor 秦凯宁红创孔维轩
Owner 北京净界新宇环保科技有限公司
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