Method for removing oil sludge in coal chemical industry wastewater

A technology for coal chemical wastewater and sludge, applied in chemical instruments and methods, separation methods, grease/oily substances/float removal devices, etc., can solve problems such as large usage of chemicals and inability to effectively remove sludge, and reduce biochemical treatment. Difficulty, enhance the effect of mud-water separation, and increase the effect of economic benefits

Active Publication Date: 2022-05-13
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the technical problems existing in the prior art, the present invention provides a method for removing sludge in coal chemical industry wastewater to solve the technical problems that the existing sludge removal process cannot effectively remove sludge and the amount of chemicals used is large

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] This embodiment 1 provides a method for removing sludge in coal chemical industry wastewater, comprising the following steps:

[0045] Step 1. Take the coal chemical wastewater to be treated, the demulsification material LY-01 and the coalescence material LY-02 according to the volume ratio of 1000:20:1.

[0046] Step 2. Add the demulsification material LY-01 to the coal chemical wastewater to be treated, and stir for 10 minutes at a stirring rate of 700r / min, so that the colloids in the coal chemical wastewater to be treated are basically destabilized and part of the sludge aggregates Agglomerates of smaller volume are formed, resulting in an intermediate mixed system.

[0047] Step 3. Add the coalescing material LY-02 to the intermediate mixing system, and stir for 30 minutes at a stirring rate of 100 r / min, so that the oily sludge in the wastewater can be agglomerated into larger aggregates; Under the condition of magnetic field environment, stand still for 2 hours ...

Embodiment 2

[0049] This embodiment 2 provides a method for removing sludge in coal chemical industry wastewater, comprising the following steps:

[0050] Step 1. Take the coal chemical wastewater to be treated, the demulsification material LY-01 and the coalescing material LY-02 at a volume ratio of 1000:10:1.

[0051] Step 2. Add the demulsification material LY-01 to the coal chemical wastewater to be treated, and stir for 6 minutes at a stirring rate of 600r / min, so that the colloids in the coal chemical wastewater to be treated are basically destabilized and part of the sludge aggregates Agglomerates of smaller volume are formed, resulting in an intermediate mixed system.

[0052] Step 3. Add the coalescing material LY-02 to the intermediate mixing system, and stir for 25 minutes at a stirring rate of 200r / min, so that the oily sludge in the wastewater can be agglomerated into larger aggregates; Under the condition of magnetic field environment, stand still for 2 hours to further coal...

Embodiment 3

[0054] This embodiment 3 provides a method for removing sludge in coal chemical industry wastewater, comprising the following steps:

[0055] Step 1. Take the coal chemical wastewater to be treated, the demulsification material LY-01 and the coalescence material LY-02 according to the volume ratio of 800:20:1.

[0056] Step 2. Add the demulsification material LY-01 to the coal chemical wastewater to be treated, and stir for 8 minutes at a stirring rate of 500r / min, so that the colloids in the coal chemical wastewater to be treated are basically destabilized and part of the sludge aggregates Agglomerates of smaller volume are formed, resulting in an intermediate mixed system.

[0057] Step 3. Add the coalescing material LY-02 to the intermediate mixing system, and stir for 20 minutes at a stirring rate of 300r / min, so that the oily sludge in the wastewater can be agglomerated into larger aggregates; Under the condition of magnetic field environment, stand still for 2 hours to ...

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Abstract

The invention discloses a method for removing oil sludge in coal chemical wastewater, which comprises the following steps: adding a demulsification material LY-01 into coal chemical wastewater to be treated, and stirring to obtain an intermediate mixed system; adding a coalescence material LY-02 into the intermediate mixed system, stirring, standing and separating to obtain wastewater after oil sludge treatment; the demulsification material LY-01 is prepared from a quaternary ammonium salt cationic monomer, an oleophylic and hydrophobic monomer and polymeric alcohol amine; the coalescence material LY-02 is prepared from gelatin, a magnetic powder material, citric acid and a demulsification material LY-01; a demulsification material LY-01 and a coalescence material LY-02 are added into the coal chemical industry wastewater to be treated, the surfaces of the demulsification material LY-01 and the coalescence material LY-02 both have rich positive charges and branched chain structures, colloidal substance particles with negative charges in the wastewater are destabilized, small-size aggregates are coalesced by utilizing the coalescence performance of the coalescence material LY-02, and therefore the demulsification material LY-01 and the coalescence material LY-02 can be used for treating the coal chemical industry wastewater. Finally, the oil sludge is separated and removed.

Description

technical field [0001] The invention belongs to the technical field of coal chemical wastewater pretreatment, in particular to a method for removing oil sludge in coal chemical wastewater. Background technique [0002] Coal chemical wastewater has a large amount of effluent and complex water quality. It is a kind of chemical wastewater that is difficult to treat; among them, the conversion of 1 ton of coal will produce about 0.8-1.1 tons of wastewater. This type of wastewater not only has a large amount of effluent, but also contains a lot of solid suspended particles, oil, phenol, ammonia nitrogen and other toxic and harmful substances; if the pretreatment process of coal chemical wastewater is not effective in removing sludge, it will not only increase the difficulty of recovery of phenol and ammonia, but also reduce its recovery efficiency; moreover, it will also lead to The blockage of the subsequent recovery process and the difficulty in the normal operation of the bioc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/00C02F1/56B01D17/05C02F103/34
CPCC02F1/008C02F1/56B01D17/047B01D17/048C02F2103/34C02F2305/04C02F2001/007C02F1/40C02F2209/08
Inventor 杨壮壮刘永军陈柯宇刘兴社杨璐刘磐刘喆张爱宁
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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