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Application of reverse osmosis concentrated water generated in paper-making industry in snow-melting agents

A technology of reverse osmosis concentrated water and deicing agent, which is applied in water/sewage treatment, process wastewater treatment, oxidized water/sewage treatment, etc. It can solve the problems of deicing agent performance impact, poor snowmelting effect, environmental pollution, etc., to achieve The effect of solving environmental problems, simple technological process, and good industrial utilization value

Active Publication Date: 2019-01-18
ZIBO YONGFENG ENVIRONMENTAL PROTECTION TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this process is only suitable for reverse osmosis concentrated brine with low CODcr content. Because high CODcr content means high organic matter content, high organic matter content has a great impact on the performance of snow melting agent, poor snow melting effect, and serious environmental pollution. Therefore, this process is not suitable. Suitable for reverse osmosis concentrated water produced by the paper industry with high CODcr content

Method used

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  • Application of reverse osmosis concentrated water generated in paper-making industry in snow-melting agents

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Adopt the process of the present invention to treat papermaking reverse osmosis concentrated water with high CODcr content (1355 mg / L), 0.9485

[0043] Step 1: Take 700mL paper-making reverse osmosis concentrated water and put it into a 1000mL three-necked bottle, add 3.79g flocculant (4 times the CODcr), T=30±2°C, keep warm for 30 minutes, stir at 350 rpm, and then add coagulation aid Agent (0.05 times of CODcr) 47mg, stirring speed is 20-100 rpm, T=30±2°C, holding time is 30 minutes, stirring speed is 80 rpm, filter the concentrated reverse osmosis water after flocculation with medium-speed quantitative filter paper, Dilute the filtrate to 700 mL with distilled water for later use.

[0044] Step 2: Add 700mL of the filtrate in step 1 into a 1000mL three-necked flask, add 4.74g of advanced oxidant (5 times that of CODcr), pH=3.0±1.0, T=30±2°C, keep warm for 60 minutes, and stir at 350 rpm , add coprecipitant (5 times of CODcr) 4.74g immediately after advanced oxidatio...

Embodiment 2

[0047] Adopt the process of the present invention to treat papermaking reverse osmosis concentrated water with low CODcr content (920 mg / L),

[0048] Step 1: Take 700mL paper-making reverse osmosis concentrated water and put it into a 1000mL three-necked bottle, add 2.58g flocculant (4 times of CODcr), T=30±2°C, keep warm for 30 minutes, stir at 350 rpm, and then add coagulation aid Agent (0.05 times of CODcr) 32mg, the stirring speed is 20-100 rpm, T=30±2°C, the holding time is 30 minutes, the stirring speed is 80 rpm, and the concentrated reverse osmosis water after flocculation is filtered with medium-speed quantitative filter paper, Dilute the filtrate to 700 mL with distilled water for later use.

[0049] Step 2: Add 700mL of the filtrate in step 1 into a 1000mL three-necked flask, add 3.22g of advanced oxidant (5 times that of CODcr), pH=3.0±1.0, T=30±2°C, keep warm for 60 minutes, and stir at 350 rpm , add coprecipitant (5 times of CODcr) 3.22g immediately after advanc...

Embodiment 3

[0052] Compared with Example 1, 0.5 g of activator was added, T=40±2°C, the holding time was 60 minutes, the stirring speed was 350 rpm, and the rest were the same as in Example 1. The prepared snow-melting agent has a measured relative snow-melting and ice-melting ability of 105%.

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Abstract

The invention relates to the technical field of drainage recycling in the paper-making industry, and particularly relates to application of reverse osmosis concentrated water generated in the paper-making industry in snow-melting agents. Reverse osmosis concentrated water is used for manufacturing snow melting agents after flocculation, oxidation, co-precipitation and activation. The method can solve the problem of post-treating and applying paper-making reverse osmosis concentrated water, the snow melting agent has a relative snow melting and ice melting performance being 100 percent or more,is a good recycling means and solve the environmental problem, and has a good industrial utilization value. The process adopted for treating paper-making reverse osmosis concentrated water has a simple process flow, and chemicals used in the process are clean and environment-friendly.

Description

technical field [0001] The invention relates to the technical field of drainage reuse in the papermaking industry, in particular to the application of reverse osmosis concentrated water produced in the papermaking industry in deicing agents. Background technique [0002] In recent years, the country has become more and more demanding on environmental protection. It has strict requirements on the displacement per ton of product of paper-making enterprises, and even achieves close to zero discharge. Improving the water reuse rate has become a research hotspot today. The return water index of the general wastewater treatment method cannot meet the water use standard of the paper industry, but the backwater treated by the ultrafiltration-reverse osmosis double-membrane method can fully meet the water use standard of the paper industry. More and more paper-making enterprises adopt this double-membrane method. To treat papermaking wastewater to achieve the purpose of saving clean ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C09K3/18C02F103/28
CPCC02F1/001C02F1/441C02F1/5236C02F1/72C02F9/00C02F2001/007C02F2103/28C09K3/185
Inventor 吴朝军张建华姜海强王东李书平李荣刚于冬梅
Owner ZIBO YONGFENG ENVIRONMENTAL PROTECTION TECH CO LTD
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