Sewage treatment agent for paper mills

A sewage treatment agent, technology for paper mills, applied in water/sludge/sewage treatment, descaling and water softening, chemical instruments and methods, etc. problem, to achieve the effect of good protection system, anti-scaling algae growth, and low dosage

Inactive Publication Date: 2012-10-03
天津市大港巨龙造纸厂
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Coagulants currently used to treat industrial wastewater include aluminum salt coagulants, iron salt coagulants, aluminum salts and iron salts in a weight ratio of 1:1. High and difficult to be widely used, and when they are used to treat wastewater, the resulting sludge is of poor quality, slow to settle, high in moisture content and difficult to dehydrate
And lignin is a by-product of the paper industry, which is rarely used. A large amount of alkali lignin is discharged into rivers every year, causing a great waste of lignin resources. At the same time, it seriously pollutes the environment and destroys the ecological balance. In order to eliminate pollution, waste For treasure, extract alkali lignin from papermaking black liquor and use alkali lignin as raw material to further prepare sewage treatment agent, which can save cost and meet the needs of environmental protection, so it is necessary to provide a new type of sewage treatment agent

Method used

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  • Sewage treatment agent for paper mills
  • Sewage treatment agent for paper mills
  • Sewage treatment agent for paper mills

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A paper mill sewage treatment agent is characterized in that it is mixed with the following parts by weight

[0019]

[0020] The preparation method of the composite coagulant is to mix inorganic acid and red clay for leaching reaction, the mass ratio of red clay and inorganic acid is 1:1, wherein the inorganic acid is sulfuric acid, and the mass concentration of sulfuric acid is 30%% , the reaction temperature is 50°C, the reaction time is 70min, and the reaction product is sieved to remove sand and stone.

[0021] The red clay is composed of the following substances in weight percentage: aluminum oxide, 15-40%; ferric oxide, 10-25% silicon dioxide; 25-65%.

[0022] The preparation method of the modified sulfonated lignin is: adding a small amount of polyferric mass ratio to 2000:1 in the papermaking black liquor, adding acid to adjust the pH value to 3, controlling the temperature to 55°C, flocculating and stratifying the black liquor, After filtering, the filter ...

Embodiment 2

[0024] A paper mill sewage treatment agent is characterized in that it is composed of the following components by weight:

[0025]

[0026] The preparation method of described composite coagulant is to carry out leaching reaction by mixing inorganic acid and red clay, the mass ratio of red clay and inorganic acid is 2: 1, wherein inorganic acid is sulfuric acid, and the mass concentration of sulfuric acid is 45%, Reaction temperature is 55 ℃, and reaction time is 80min, and reaction product is sieved to remove sand and stone.

[0027] The red clay is composed of the following substances in weight percentage: aluminum oxide, 15-40%; ferric oxide, 10-25%; silicon dioxide, 25-65%.

[0028] The preparation method of the modified sulfonated lignin is: adding a small amount of polyferric mass ratio to 2000: 1.5 in the papermaking black liquor, adding acid to adjust the pH value to 4, controlling the temperature to 55° C. After filtering, the filter cake is dried at a constant te...

Embodiment 3

[0030] A paper mill sewage treatment agent is characterized in that it is composed of the following components by weight:

[0031]

[0032] The preparation method of described composite coagulant is to carry out leaching reaction by mixing inorganic acid and red clay, the mass ratio of red clay and inorganic acid is 3: 1, wherein inorganic acid is sulfuric acid, and the mass concentration of sulfuric acid is 55%, Reaction temperature is 60 DEG C, and reaction time is 90min, and reaction product is sieved to remove sand and stone.

[0033] The red clay is composed of the following substances in weight percentage: aluminum oxide, 15-40%; ferric oxide, 10-25%; silicon dioxide, 25-65%.

[0034] The preparation method of the modified sulfonated lignin is: adding a small amount of polyferric mass ratio to 2000:2 in the papermaking black liquor, adding acid to adjust the pH value to 4, controlling the temperature to 55° C. After filtering, the filter cake is dried at a constant t...

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Abstract

The invention discloses a sewage treatment agent for paper mills. The sewage treatment agent for paper mills consists of the following components in parts by weight: 25-45 parts of starch xanthate, 5-15 parts of composite coagulant, 10-20 parts of modified ligninsulfonate, 1-3 parts of benzotriazole, 40-50 parts of 2-phosphonobutane-1,2,4-tricarboxylic acid, 40-50 parts of zinc gluconate, 2-5 parts of alcohol, 30-40 parts of water and 5-15 parts of cationic flocculant. After being added in a circulating water system, the sewage treatment agent for paper mills has the effects of effectively inhibiting corrosion, scale and algae growth, favorable protection function is brought to a cooling water system, and the whole process is free of waste gas / water / residue discharge, so that the black liquor pollution problem of pulping paper mills is solved. The sewage treatment agent for paper mills is used for treating sewage and treating wastes with processes of wastes against one another, the treatment process is simple, the dosage is less, the effect is good, the water treatment cost is effectively reduced, and good economic benefit and wide social benefit are achieved.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, in particular to a paper mill sewage treatment agent. Background technique [0002] Coagulants currently used to treat industrial wastewater include aluminum salt coagulants, iron salt coagulants, aluminum salts and iron salts in a weight ratio of 1:1. High and difficult to be widely used, and when they are used to treat wastewater, the resulting sludge is of poor quality, slow to settle, high in moisture content and difficult to dehydrate. And lignin is a by-product of the paper industry, which is rarely used. A large amount of alkali lignin is discharged into rivers every year, causing a great waste of lignin resources. At the same time, it seriously pollutes the environment and destroys the ecological balance. In order to eliminate pollution, waste For treasure, extracting alkali lignin from papermaking black liquor and using alkali lignin as raw material to further prepare sewage tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/14C02F5/00
Inventor 刘洪彬
Owner 天津市大港巨龙造纸厂
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