Organic compound sewage dehydrating conditioning agent prepared from paper mill sludge and preparation method

A papermaking sludge and sludge dewatering technology, which is applied in the direction of dehydration/drying/concentrated sludge treatment, can solve pollution and other problems, and achieve the effects of easy biodegradation, lower sludge moisture content, and less dosage

Inactive Publication Date: 2017-07-14
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a new type of organic composite sludge dehydration conditioner prepared with papermaking sludge as the main raw material and its preparation method for the pollution caused by papermaking sludge, so as to realize its resource utilization; The addition amount of mud dehydration conditioner is small, and the dosage of polyacrylamide is greatly reduced at the same time, which reduces secondary pollution and is conducive to the subsequent resource utilization of sludge

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The method of utilizing the papermaking sludge of the present embodiment to prepare the organic composite sludge dewatering conditioner is as follows:

[0026] (1) Extraction of lignin: Add 100Kg of papermaking sludge into 1000Kg of water, add dropwise NaOH solution with a mass fraction of 10% under stirring, adjust the pH to 11, stir for 30 minutes, and filter; add sulfuric acid to the filtrate to adjust the pH to 3, The lignin is completely precipitated, kept in a water bath at 80°C for 60 minutes, suction filtered while hot, and the filter cake is dried at 45°C to obtain lignin;

[0027] (2) Preparation of triethylepoxypropylammonium chloride monomer: Add 92.5g of epichlorohydrin and 211mL of methanol aqueous solution (the volume ratio of methanol to water is 11:200) into the reactor, and heat in a water bath to 45°C, then according to the molar ratio of triethylamine and epichlorohydrin as 1.1:1, add 111g of triethylamine that has been preheated to 45°C, and stir at...

Embodiment 2

[0032] The method of utilizing the papermaking sludge of the present embodiment to prepare the organic composite sludge dehydration conditioner is as follows:

[0033] (1) Extraction of lignin: Add 100Kg of papermaking sludge into 1000Kg of water, add dropwise NaOH solution with a mass fraction of 10% under stirring, adjust the pH to 11, continue stirring for 40min, and filter; then add sulfuric acid to the filtrate under stirring to adjust The pH is 4, so that the lignin is completely precipitated, kept in a 90°C water bath for 50 minutes, and suction filtered while it is hot to obtain a filter cake; the filter cake is dried at 55°C to obtain lignin;

[0034](2) Preparation of triethylepoxypropylammonium chloride monomer: Add 92.5g of epichlorohydrin and 211mL of methanol aqueous solution (the volume ratio of methanol to water is 11:200) into the reactor, and heat in a water bath to 45°C, then add 111g of triethylamine preheated to 45°C according to the molar ratio of triethy...

Embodiment 3

[0039] The method of utilizing the papermaking sludge of the present embodiment to prepare the organic composite sludge dewatering conditioner is as follows:

[0040] (1) Extraction of lignin: Add 100Kg of papermaking sludge into 1000Kg of water, add dropwise NaOH solution with a mass fraction of 10% under stirring, adjust the pH to 12, continue stirring for 35min, and filter; then add sulfuric acid to the filtrate under stirring to adjust The pH is 3, so that the lignin is completely precipitated, kept in an 85°C water bath for 55 minutes, and filtered while hot to obtain a filter cake; the filter cake is dried at 50°C to obtain lignin;

[0041] (2) Preparation of triethylepoxypropylammonium chloride monomer: Add 92.5g of epichlorohydrin and 211mL of methanol aqueous solution (the volume ratio of methanol to water is 11:200) into the reactor, and heat in a water bath to 45°C, then add 111g of triethylamine preheated to 45°C according to the molar ratio of triethylamine and ep...

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Abstract

The invention discloses an organic compound sewage dehydrating conditioning agent prepared from paper mill sludge and a preparation method. The preparation method comprises the following steps: dissolving paper mill sludge with alkaline liquor, acidifying the filtrate with acid liquor, and filtering and drying the separated lignin to obtain lignin; preparing a chlorinated triethyl glycidyl ammonium monomer from epoxy chloropropane and triethylamine; dissolving the lignin with water and a sodium hydroxide solution, adding ammonium persulfate after heating, after stirring for activating, adding the chlorinated triethyl glycidyl ammonium monomer, and stirring the mixture to react to obtain a lignin quaternary ammonium salt product; and compounding the lignin quaternary ammonium salt product and cationic polyacrylamide in a weight ratio of (5-7.5): (0.015-0.03) to prepare the sewage dehydrating conditioning agent. The organic compound sewage dehydrating conditioning agent disclosed by the invention realizes resource utilization of paper mill sludge, obviously improves the sludge dehydrating property, and is small in dosage, and the feeding amount of polyacrylamide is reduced to a great extent, so that the resource utilization of follow-up sludge is facilitated.

Description

technical field [0001] The invention belongs to the technical field of waste resource utilization and sludge treatment dehydration conditioner, and in particular relates to a method for preparing a novel organic composite sludge dehydration conditioner by using sludge produced in an alkaline papermaking process as a main raw material. Background technique [0002] With the development of industry and the improvement of people's living standards, the demand for various papers is increasing, so the amount of papermaking sludge generated in the production process of papermaking enterprises is increasing, and its treatment and disposal are also transformed from waste to resource utilization. At present, more studies are made on the use of papermaking sludge for the manufacture of cement, bricks, wood-based panels, ceramsite, etc., or the production of dispersion-stabilizers, or the production of bio-organic fertilizers. For its application in the water treatment industry, the Ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/14
CPCC02F11/14
Inventor 蒋玲黄改玲王晓杰李占才张智强贾巧娟
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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