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Method and device for treating rosin modified phenolic resin industrial wastewater

A technology of phenolic resin and industrial wastewater, applied in multi-stage water treatment, water/sewage treatment, natural water treatment, etc., can solve the self-built biochemical method site, capital, technical difficulty, one-time investment and land occupation of biochemical method Large size, odor and other problems, to achieve the effect of small footprint of the implementation equipment, easy operation, and reduced consumption

Inactive Publication Date: 2019-09-27
山西省应用化学研究所(有限公司) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the biochemical method has the characteristics of one-time investment, large floor area, and peculiar smell during operation.
Therefore, for most small and medium-sized rosin-modified phenolic resin manufacturers, the self-built biochemical method has great difficulties in terms of site, capital, and technology.

Method used

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  • Method and device for treating rosin modified phenolic resin industrial wastewater

Examples

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Comparison scheme
Effect test

Embodiment 1

[0042] Rosin modified phenolic resin wastewater, COD Cr The content of formaldehyde is 50000 mg / L, the content of formaldehyde is 80 g / L, the content of volatile phenol is 2 g / L, and the content of NaCl is 70 g / L. Pump the waste water into the pre-reactor, put in 5% CaO of the waste water, start stirring, and pass superheated steam into the jacket of the pre-reactor to keep the temperature of the waste water at 89°C and reflux for 4 hours. Open the bypass valve, evaporate the waste water at 97°C, and condense the waste water into the reactor. When the total amount of condensed waste water evaporated reaches 70% of the waste water, the jacket of the pre-reaction kettle is replaced with circulating cooling water. When the temperature of the waste water in the kettle drops to 40°C, the bottom valve is opened, filtered, and the filtrate is drained. into the pre-reaction kettle, and the filter residue is placed in the filter residue temporary storage tank. Condensed waste water C...

Embodiment 2

[0044] Rosin modified phenolic resin wastewater, COD Cr The content of formaldehyde is 34000 mg / L, the content of formaldehyde is 70 g / L, the content of volatile phenol is 1.5 g / L, and the content of KCl is 60 g / L. The waste water was pumped into the pre-reactor, and after inputting 4% KOH of the waste water quality, stirring was started, and superheated steam was introduced into the jacket of the pre-reactor to keep the temperature of the waste water at 87°C and reflux for 4 hours. Open the bypass valve, evaporate the waste water at 96 °C, and condense the waste water into the reactor. When the total amount of condensed waste water evaporated reaches 70% of the waste water, the jacket of the pre-reaction kettle is replaced with circulating cooling water. When the temperature of the waste water in the kettle drops to 40°C, the bottom valve is opened, filtered, and the filtrate is drained. into the pre-reaction kettle, and the filter residue is placed in the filter residue tem...

Embodiment 3

[0046] Rosin modified phenolic resin wastewater, COD Cr 25000 mg / L, formaldehyde content 60 g / L, volatile phenol content 1.2 g / L, MgCl 2 Content 60 g / L. Pump the waste water into the pre-reactor, put in 2% NaOH of the waste water, start stirring, and pass superheated steam into the jacket of the pre-reactor to keep the temperature of the waste water at 85°C and reflux for 4 hours. Open the bypass valve, evaporate the waste water at 98 °C, and condense the waste water into the reactor. When the total amount of evaporated condensate reaches 70% of the waste water, the jacket of the pre-reaction kettle is replaced with circulating cooling water. When the temperature of the waste water in the kettle drops to 40°C, the bottom valve is opened, filtered, and the filtrate is drained. into the pre-reaction kettle, and the filter residue is placed in the filter residue temporary storage tank. In the condensed wastewater in the reactor, adjust the pH value to 4 with sulfuric acid, and...

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Abstract

The invention relates to a method and a device for treating rosin modified phenolic resin industrial wastewater. The method includes the steps of adding inorganic alkali in wastewater in a pre-reactor, and heating for reflux reaction for 1 to 4 hours; then evaporating the wastewater in the pre-reactor at normal pressure, such that part or all of organic pollutants are distilled off with steam and condensed into a reactor; adjusting the pH of the condensed wastewater in the reactor to 3 to 4, and then adding Fenton's reagent in batches for reacting for 2 to 3 hours; adding Ca(ClO)2 in batches, reacting for 3 to 4 hours, then adjusting the pH to 8 to 9, flocculating and precipitating; standing, wherein the upper layer is treated water, and the lower layer is precipitates. After treatment, the CODCr of the wastewater can be reduced to 500 mg / L or below, and the formaldehyde and volatile phenol can be reduced to 0.1 mg / L or below.

Description

technical field [0001] The invention relates to a treatment method for phenolic resin wastewater, in particular to a high COD wastewater containing soluble inorganic salts Cr A treatment method and equipment for rosin-modified phenolic resin wastewater. Background technique [0002] Rosin modified phenolic resin is prepared by the reaction of phenolic resin and rosin, in which phenolic resin is composed of phenols (such as phenol, p-tert-butylphenol, p-nonylphenol, dodecylphenol, etc.) and aldehydes Compounds (such as formaldehyde, acetaldehyde and furfural, etc.) are synthesized under the catalysis of acid or alkali, and after neutralization to form a salt, the phenolic resin is extracted and separated from water with toluene. The generated wastewater contains complex organic pollutants such as phenols, aldehydes, organic acids, alcohols, rosin, turpentine, and soluble inorganic salts in relatively high concentrations. This kind of wastewater is very harmful to the enviro...

Claims

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Application Information

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IPC IPC(8): C02F9/10C02F103/38
CPCC02F1/001C02F1/04C02F1/5236C02F1/66C02F1/722C02F9/00C02F2103/38C02F2301/08
Inventor 郭晓勇马国章张振荣任效东李萍袁鸿贾金兰
Owner 山西省应用化学研究所(有限公司)
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