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Process for separating oil, water and solid from oil-contained float slegs

A technology of solid matter and scum, which is applied in the field of environmental engineering, can solve the problems of high cost of chemicals and large investment in equipment, and achieve good economic value and the effect of eliminating pollution

Inactive Publication Date: 2002-11-27
罗德春
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some other companies use imported centrifugal separation devices for treatment, but this method requires a large investment in equipment, high cost of chemicals used in treatment, and cannot achieve a more thorough recovery of the oil contained in the scum

Method used

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  • Process for separating oil, water and solid from oil-contained float slegs
  • Process for separating oil, water and solid from oil-contained float slegs
  • Process for separating oil, water and solid from oil-contained float slegs

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Embodiment Construction

[0018] Use a thick slurry pump to lift the oily scum into the separation reactor, turn on the compressed air for stirring, add sulfuric acid to acidify, adjust the pH to between 2.0 and 3.0, stop the air stirring; turn on the steam for heating, when the medium temperature rises After reaching 75-85°C and keeping the temperature constant for 1 hour, stop heating. After standing and separating for 4 hours, drain the aqueous solution below the oil layer into the neutralization tank, and then add lime to adjust the pH to between 6.5 and 7.5. Using a thick slurry pump to lift the mixed liquid to a chamber filter press for filtration, solid-liquid separation is achieved.

[0019] The process flow of the batch processing system of the present invention is as follows figure 1 Shown.

[0020] For companies with a large amount of scum, continuous flow treatment can also be used when using this technology. figure 2 Shown.

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PUM

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Abstract

A process for separating oil, water and solid from oil-contained floating dregs includes such steps as acidifying the floating dregs to pH=2-3, heating to 75-85 deg.C for decomposing aluminium hydroxide particles into soluble Al ions, so oil in floating dregs quickly floating up and solid suspended in floating dregs depositing, layering aside for 4 hr, discharging the aqueous solution under oil layer into a neutralizing pool, then adding alkaline substance for reaction on the said Al ions to generate aluminium hydroxide deposit, and press-filtering to separate water and solid.

Description

Invention field [0001] The invention belongs to the field of environmental engineering, and specifically relates to a separation treatment technology for oil, water and solid substances contained in the scum produced in the process of flotation treatment of oily wastewater from petrochemical enterprises. Background technique [0002] At present, most of the scum produced in the petrochemical industry has not been treated. Although many companies have used traditional sludge dewatering methods in treatment facilities, almost all of them cannot operate normally. Recently, there have been reports about "extraction method" and "heat treatment method", but they are limited to experimental research and have not yet reached the requirements of industrial applications. In addition, some companies use imported centrifugal separation devices for processing, but this method requires a large investment in equipment, and the cost of chemicals used in the processing is high, and the oil contai...

Claims

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Application Information

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IPC IPC(8): C02F9/02C02F9/08
Inventor 罗德春
Owner 罗德春
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