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Softening method of high-hardness regenerated high-strength corrugated paper making wastewater

A technology for papermaking wastewater and corrugated paper, applied in water softening, chemical instruments and methods, and processing wastewater treatment, etc., can solve problems such as the impact of sewage treatment, reduce civil engineering and chemical costs, avoid pipeline scaling, and effectively recycle Effect

Active Publication Date: 2020-05-19
YUEYANG FOREST & PAPER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to address the above problems. The present invention aims to provide a softening method for high-hardness regenerated high-strength corrugated papermaking wastewater. The method solves the problems of pipeline fouling, A series of problems affecting sewage treatment such as impeller clogging and sludge calcification

Method used

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  • Softening method of high-hardness regenerated high-strength corrugated paper making wastewater
  • Softening method of high-hardness regenerated high-strength corrugated paper making wastewater
  • Softening method of high-hardness regenerated high-strength corrugated paper making wastewater

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Embodiment 1

[0030] A method for softening high-hardness recycled high-strength corrugated papermaking wastewater, comprising the following steps:

[0031] Step 1: preparing softening agent;

[0032] Step 2: Mix the softening agent and waste water evenly through a pipeline mixer to obtain a mixed solution;

[0033] Step 3: Install electromagnetic anti-scaling equipment on the delivery pipeline from the pipeline mixer to the water inlet of the sedimentation tank;

[0034] Step 4: Put the mixed solution into the sedimentation tank through the pipeline of the electromagnetic antiscaling equipment installed in step 3. The sedimentation tank is equipped with a two-stage sedimentation tank, and calcium salt precipitation is removed by sedimentation; coagulant is added during precipitation;

[0035] Step 5: Clean the delivery pipeline. After the delivery pipeline has been used for a long time, use citric acid to clean it to reduce the delivery resistance.

[0036] Further, softening agent is th...

Embodiment 2

[0047]A method for softening high-hardness recycled high-strength corrugated papermaking wastewater, comprising the following steps:

[0048] Step 1: preparing softening agent;

[0049] Step 2: Mix the softening agent and waste water evenly through a pipeline mixer to obtain a mixed solution;

[0050] Step 3: Install electromagnetic anti-scaling equipment on the delivery pipeline from the pipeline mixer to the water inlet of the sedimentation tank;

[0051] Step 4: Put the mixed solution into the sedimentation tank through the pipeline of the electromagnetic antiscaling equipment installed in step 3. The sedimentation tank is equipped with a two-stage sedimentation tank, and calcium salt precipitation is removed by sedimentation; coagulant is added during precipitation;

[0052] Step 5: Clean the delivery pipeline. After the delivery pipeline has been used for a long time, use citric acid to clean it to reduce the delivery resistance.

[0053] Further, softening agent is the...

Embodiment 3

[0063] Embodiment 3: A method for softening high-hardness regenerated high-strength corrugated papermaking wastewater, comprising the following steps:

[0064] Step 1: preparing softening agent;

[0065] Step 2: Mix the softening agent and waste water evenly through a pipeline mixer to obtain a mixed solution;

[0066] Step 3: Install electromagnetic anti-scaling equipment on the delivery pipeline from the pipeline mixer to the water inlet of the sedimentation tank;

[0067] Step 4: Put the mixed solution into the sedimentation tank through the pipeline of the electromagnetic antiscaling equipment installed in step 3. The sedimentation tank is equipped with a two-stage sedimentation tank, and calcium salt precipitation is removed by sedimentation; coagulant is added during precipitation;

[0068] Step 5: Clean the delivery pipeline. After the delivery pipeline has been used for a long time, use citric acid to clean it to reduce the delivery resistance.

[0069] Further, soft...

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Abstract

The invention discloses a softening method of high-hardness regenerated high-strength corrugated paper papermaking wastewater. The softening method comprises the following steps: step 1, preparing a softening agent; 2, uniformly mixing a softening agent and the wastewater through a pipeline mixer to obtain a mixed solution; 3, installing electromagnetic scale inhibition equipmenton a conveying pipeline from the rear portion of the pipeline mixer to the water inlet of a sedimentation tank; 4, introducing themixed solution into the sedimentation tank through the electromagnetic scale inhibitionequipment installed in the step 3, providing the sedimentation tankwith a two-section type sedimentation tank, removing calcium salt sedimentthrough a sedimentation method, andadding a coagulant during precipitation; 5, cleaning the conveying pipeline with citric acidafter the conveying pipeline is used for a long time, so that conveying resistance is reduced. According to the method, through combination of multiple processes, a series of problems such as pipeline scaling, impeller blockage and sludge calcification which are generated in the recycled paper making process and have influences onsewage treatment are solved.

Description

technical field [0001] The invention relates to the field of industrial sewage treatment, in particular to a softening method for high-hardness regenerated high-strength corrugated papermaking wastewater. Background technique [0002] Waste paper, especially cardboard paper, corrugated paper, etc., the waste water produced in the papermaking process usually contains high hardness, calcium salts are easy to precipitate, scale inside pipes and equipment, and at the same time, it is easy to calcify anaerobic sludge. have a greater impact. [0003] At present, the softening methods for high-hardness wastewater mainly include chemical methods and ion exchange methods. The chemical method for removing calcium and magnesium is the most common in practical applications. Sodium carbonate, sodium bicarbonate, etc., make calcium and magnesium ions form insoluble salts to be removed by precipitation. However, this method will produce a large amount of sludge, and the cost of chemicals...

Claims

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Application Information

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IPC IPC(8): C02F9/12C02F103/28
CPCC02F1/48C02F1/5236C02F5/02C02F9/00C02F2001/007C02F2103/28
Inventor 李明徐辉罗含陈帅奇康志辉张永泽张伟华
Owner YUEYANG FOREST & PAPER CO LTD