Method for using diesel oil caustic sludge wastewater for diesel oil caustic washing

A technology of alkali residue wastewater and diesel oil, applied in the direction of refining with alkaline aqueous solution, etc., can solve problems such as high energy consumption and environmental pollution, and achieve the effects of improving economic benefits, making full use of it, and relieving environmental pressure

Inactive Publication Date: 2008-10-08
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Na in the alkali slag wastewater after demulsification 2 SO 4 The content is very high, and the discharge will cause great pollution to the environment.
If necessary to further reduce Na 2 SO 4 The content of the solution can be achieved by the method of concentration of the solution, but the energy consumption of this method is relatively high

Method used

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  • Method for using diesel oil caustic sludge wastewater for diesel oil caustic washing

Examples

Experimental program
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Effect test

Embodiment 1

[0009] Put the diesel alkali slag wastewater into the storage tank, let it stand for 2 hours to settle and discharge the solid waste, pass excessive compressed air from the bottom of the storage tank to fully mix the alkali slag and air, oxidize the organic and inorganic sulfides in it to sulfate, and then Add 2ppm of polyacrylamide to it, stir and mix evenly, then add NaOH to make Na 2 SO 4 The 3% NaOH solution is recycled for alkaline washing process.

Embodiment 2

[0011] Put the diesel alkali slag wastewater into the storage tank, let it stand for 2 hours to settle and discharge the solid waste, pass excessive compressed air from the bottom of the storage tank to fully mix the alkali slag and air, oxidize the organic and inorganic sulfides in it to sulfate, and then Add 5ppm of polyacrylamide to it, stir and mix evenly, then add NaOH to make Na 2 SO 4 The 3% NaOH solution is recycled for alkaline washing process.

Embodiment 3

[0013] Put the diesel alkali slag wastewater into the storage tank, let it stand for 2 hours to settle and discharge the solid waste, pass excessive compressed air from the bottom of the storage tank to fully mix the alkali slag and air, oxidize the organic and inorganic sulfides in it to sulfate, and then Add 1ppm of polyacrylamide to it, stir and mix evenly, then add NaOH to make Na 2 SO 4 The 3% NaOH solution is recycled for alkaline washing process.

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Abstract

The invention discloses a process of using diesel alkaline dregs wastewater as diesel alkaline washing, which solves that problems of serious wastewater pollution and complex disposal process; the process includes the steps as follows: the diesel alkaline dregs wastewater is fed into a storage tank; the solid wastes are discharged after the sedimentation through the standing for 1-8 hours; the compression air is fed from the bottom of the storage tank to enable the alkaline dregs to be mixed with the air sufficiently so that the organic or inorganic sulfides are transformed into sulfates through oxidation; and then 1-5ppm of polyacrylamide with the molecular weight of 0.01-0.02 million is added to be mixed evenly with the sulfates according to the weight of the saline; and then NaOH is added to obtain the 3% NaOH solution which contains Na2SO4 and is circulated for the alkaline process.

Description

technical field [0001] The invention relates to a method for using diesel alkali slag wastewater as diesel alkali washing. Background technique [0002] Various demulsifiers are used in the demulsification process of diesel oil, among which thenardite also has a good demulsification effect, and is easy to obtain and easy to operate, so thenardite often appears in the demulsification process. However, Na in the alkali slag wastewater after demulsification 2 SO 4 The content is very high, and the discharge will cause great pollution to the environment. If necessary to further reduce Na 2 SO 4 The content can be achieved through the method of solution concentration, but this method consumes more energy. In the present invention, it is made into alkaline washing liquid and used for industrial diesel alkaline washing, so as to achieve the purpose of recycling sodium sulfate-containing wastewater and recovering Glauber's salt, completely eliminate the pollution of sodium sulf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G19/02
Inventor 曹成波吴艳萍
Owner SHANDONG UNIV
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