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Preparation method of environment-friendly corrosion and scale inhibitor for sewage treatment

A corrosion and scale inhibitor, sewage treatment technology, applied in water/sludge/sewage treatment, special treatment targets, chemical instruments and methods, etc. problems, to achieve the effects of accurate dosing, wide pH adaptation range, and wide pH range

Inactive Publication Date: 2018-04-24
WUXI HAOYU ENERGY SAVING ENVIRONMENTAL PROTECTION EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The invention provides a preparation method of an environmentally friendly corrosion and scale inhibitor for sewage treatment, which solves the problems of low scale inhibition rate, short dosing cycle, heavy metal ion elution rate, and low dosing accuracy of the existing environmental protection corrosion and scale inhibitors for sewage treatment. Tolerance and other technical issues

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The first step: weighing according to the ratio of parts by mass: 100 parts of distilled water, 6 parts of carbon disulfide, 8 parts of perchloric acid, 8 parts of chloroacetic acid, 16 parts of sodium humate, 30 parts of ferric chloride, 5 parts of dithiocyanomethane 6 parts of modified bentonite, 15 parts of 2-phosphonobutane-1,2,4-tricarboxylic acid, 0.5 parts of BZT, 4 parts of starch, 12 parts of maleic anhydride, 0.5 parts of sodium fluoride, di 3 parts of basic acid, 6 parts of sodium carbonate.

[0025] Step 2: Put sodium fluoride, modified bentonite and sodium carbonate in a constant temperature drying oven at 90°C for 30 minutes, then roast at 380°C for 10 minutes, put them into a pulverizer for grinding for 40 minutes, and pass through a 200-mesh sieve .

[0026] Step 3: put the ground product, distilled water, chloroacetic acid, carbon disulfide and sodium humate into a reaction kettle equipped with a thermometer, a heating device, a reflux condenser and a ...

Embodiment 2

[0030] The first step: weighing according to the ratio of parts by mass: 100 parts of distilled water, 10 parts of carbon disulfide, 20 parts of hydrogen peroxide, 12 parts of chloroacetic acid, 20 parts of sodium humate, 50 parts of ferric chloride, 25 parts of dithiocyanomethane, 10 parts of modified bentonite, 25 parts of 2-phosphonobutane-1,2,4-tricarboxylic acid, 4.5 parts of BZT, 8 parts of starch, 16 parts of maleic anhydride, 2.5 parts of sodium fluoride, dibasic acid 7 parts, 10 parts of sodium carbonate.

[0031]Step 2: Dry sodium fluoride, modified bentonite and sodium carbonate in a constant temperature drying oven at 100°C for 50 minutes, then roast at 580°C for 30 minutes, put them into a pulverizer for grinding for 50 minutes, and pass through a 400-mesh sieve .

[0032] Step 3: put the ground product, distilled water, chloroacetic acid, carbon disulfide and sodium humate into a reaction kettle equipped with a thermometer, a heating device, a reflux condenser a...

Embodiment 3

[0036] The first step: weighing according to the ratio of parts by mass: 100 parts of distilled water, 8 parts of carbon disulfide, 14 parts of nitric acid, 10 parts of chloroacetic acid, 18 parts of sodium humate, 40 parts of ferric chloride, 15 parts of dithiocyanomethane, 8 parts of modified bentonite, 20 parts of 2-phosphonobutane-1,2,4-tricarboxylic acid, 2.5 parts of BZT, 6 parts of starch, 14 parts of maleic anhydride, 1.5 parts of sodium fluoride, dibasic acid 5 parts, 8 parts of sodium carbonate.

[0037] Step 2: Dry sodium fluoride, modified bentonite and sodium carbonate in a constant temperature drying oven at 95°C for 40 minutes, then roast at 480°C for 20 minutes, put them into a pulverizer for grinding for 45 minutes, and pass through a 300-mesh sieve .

[0038] Step 3: Put the ground product, distilled water, chloroacetic acid, carbon disulfide and sodium humate into a reaction kettle equipped with a thermometer, a heating device, a reflux condenser and a stir...

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Abstract

The invention relates to a preparation method of an environment-friendly corrosion and scale inhibitor for sewage treatment. The environment-friendly corrosion and scale inhibitor is prepared from thefollowing raw materials: distilled water, carbon disulfide, an oxidant, chloroacetic acid, sodium humate, ferric chloride, dithiocyano-methane, modified bentonite, 2-phosphonobutane-1,2,4-tricarboxylic acid, barium zirconate titanate (BZT), starch, maleic anhydride, sodium fluoride, dibasic acid and sodium carbonate; the COD removal rate of the corrosion and scale inhibitor is 86-94%, the scale inhibition rate of the corrosion and scale inhibitor for calcium carbonate scale reaches up to 99-99.4%, the scale inhibition rate of the corrosion and scale inhibitor for strontium sulfate scale is 99.3-99.7%, the BOD removal rate of the corrosion and scale inhibitor is 92-98%, the chromium ion removal rate of the corrosion and scale inhibitor is 99.5-99.9%, the scale removal rate of the corrosionand scale inhibitor is 78-82%, the chemical feeding period is 10-14 days, the phosphorus elution rate of the corrosion and scale inhibitor reaches up to 99.4-99.8%, the paraffin control rate of the corrosion and scale inhibitor is 83-87%, the carbon steel corrosion rate of the corrosion and scale inhibitor is 0.002-0.004mm / a which is far better than the international standard of 0.005mm / a, and the carbon steel corrosion inhibition rate of the corrosion and scale inhibitor is 90-96%.

Description

technical field [0001] The invention relates to an environment-friendly material, in particular to a preparation method of an environment-friendly corrosion and scale inhibitor for sewage treatment. Background technique [0002] Water treatment agents are necessary chemical agents in the process of industrial water, domestic water, and wastewater treatment. By using these chemicals, water can meet certain quality requirements. Its main function is to control the formation of scale and sludge, reduce foam, reduce corrosion of materials in contact with water, remove suspended solids and toxic substances in water, deodorize and decolorize, soften water quality, etc. At present, due to the rapid increase in water consumption in various countries in the world, various environmental protection regulations (water purification laws) have been promulgated one after another, and the requirements are becoming increasingly stringent, so various efficient water treatment chemicals are in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/14
CPCC02F5/145C02F2303/08
Inventor 胡晓荣俞娟胡瑜
Owner WUXI HAOYU ENERGY SAVING ENVIRONMENTAL PROTECTION EQUIP CO LTD
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