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Circulating water phosphorus-free corrosion and scale inhibitor and preparation method thereof

A phosphorus-free corrosion inhibitor and scale inhibitor technology, applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc. , waste of pharmaceuticals and other problems, to achieve the effect of reducing the cost of dosing, no three waste discharge, and preventing equipment damage

Inactive Publication Date: 2020-12-08
SHENZHEN CHANGLONG TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most corrosion and scale inhibitors use phosphorus-containing formulas. Excessive phosphorus will lead to eutrophication of water bodies, promote the growth of algae and microorganisms, and cause adverse effects on the environment.
At the same time, due to changes in water quality and sewage, the concentration of chemicals in circulating water cannot be accurately grasped, and it is easy to cause serious corrosion of equipment and excessive dosage of chemicals due to insufficient dosage, resulting in waste of chemicals

Method used

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  • Circulating water phosphorus-free corrosion and scale inhibitor and preparation method thereof
  • Circulating water phosphorus-free corrosion and scale inhibitor and preparation method thereof
  • Circulating water phosphorus-free corrosion and scale inhibitor and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0031] A non-phosphorous corrosion and scale inhibitor for circulating water. Its preparation method is as follows: clean the reactor, first pump 320 kg of deionized water to the bottom of the reactor, set the stirring speed of the reactor to 240 rpm, 120kg of polyepoxysuccinic acid and 120kg of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer are added to the bottom of the kettle and mixed evenly, then 10kg of pH regulator is added and stirred for 0.5 hours. Put 50kg of zinc sulfate into the reactor, stir for 0.5 hours, set the temperature of the reactor to 45°C, add 250kg of sodium gluconate into the reactor, stir for 2.5 hours, then add 50kg of sodium molybdate, and then add 20kg of benzotri For nitrogen azole, add 50 kg of isothiazolinone after stirring for 2.5 hours, add 10 kg of fluorescent tracer after stirring for 1 hour, stop stirring for 2 hours, wait until the temperature drops to normal temperature, and discharge.

Embodiment 2

[0033] A non-phosphorus corrosion and scale inhibitor for circulating water. Its preparation method is as follows: clean the reactor, first pump 240 kg of deionized water to the bottom of the reactor, set the stirring speed of the reactor to 240 rpm, 130kg of polyepoxysuccinic acid and 130kg of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer are added to the bottom of the kettle and mixed evenly, then 10kg of pH regulator is added and stirred for 0.5 hours. Put 50kg of zinc sulfate into the reactor, stir for 0.5 hours, set the temperature of the reactor to 45°C, add 300kg of sodium gluconate into the reactor, stir for 2.5 hours, then add 60kg of sodium molybdate, stir for 2 hours and then put in 20kg of benzotri For nitrogen azole, add 50 kg of isothiazolinone after stirring for 2.5 hours, add 10 kg of fluorescent tracer after stirring for 1 hour, stop stirring for 2 hours, wait until the temperature drops to normal temperature, and discharge.

Embodiment 3

[0035] A non-phosphorous corrosion and scale inhibitor for circulating water. Its preparation method is as follows: clean the reactor, first pump 300kg of deionized water to the bottom of the reactor, set the stirring speed of the reactor to 240 rpm, and stir continuously 140kg of polyepoxysuccinic acid and 140kg of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer are added to the bottom of the kettle and mixed evenly, then 10kg of pH regulator is added and stirred for 0.5 hours. Put 60kg of zinc sulfate into the reactor, stir for 0.5 hours, set the temperature of the reactor to 45°C, add 200kg of sodium gluconate into the reactor, stir for 2.5 hours, then add 50kg of sodium molybdate, stir for 2 hours and then put in 20kg of benzotri For nitrogen azole, add 70kg of isothiazolinone after stirring for 2.5 hours, add 10kg of fluorescent tracer after stirring for 1 hour, stop stirring for 2 hours, wait until the temperature drops to normal temperature, and discharg...

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Abstract

The invention discloses a circulating water phosphorus-free corrosion and scale inhibitor and a preparation method thereof, and belongs to the technical field of water treatment agent preparation. Thecorrosion and scale inhibitor comprises the following components in parts by weight: 10-20 parts of polyepoxysuccinic acid or polyaspartic acid, 10-35 parts of sodium gluconate, 10-20 parts of acrylic acid-2-acrylamide-2-methyl propane sulfonic acid copolymer, 5-10 parts of zinc salt, 3-15 parts of molybdate, 1-3 parts of a copper corrosion inhibitor, 1-2 parts of a fluorescent tracer, 1-2 partsof a pH regulator, 5-10 parts of isothiazolinone and the balance of water. The phosphorus-free corrosion and scale inhibitor has the advantages of high corrosion inhibition rate, high scale inhibitionrate, low cost, no phosphorus, wide scale inhibition spectrum, wide pH application range, sterilization and slime stripping effects, low toxicity, chloride resistance, simple operation, controllablecirculating water agent concentration, safety and high efficiency, and belongs to an environment-friendly corrosion and scale inhibitor.

Description

technical field [0001] The invention belongs to the technical field of corrosion and scale inhibitors, and in particular relates to a non-phosphorus corrosion and scale inhibitor for circulating water and a preparation method thereof. Background technique [0002] In my country, fresh water resources are not abundant and the distribution between north and south is unbalanced. In the north, there is a lack of water and rain in many places, and water resources are in short supply. The demand for water conservation is very urgent. Therefore, for many industrial equipment in the north, it is very common to use a closed loop cooling water system. Compared with the once-through cooling water system, the closed circulation cooling water system can not only save a lot of water resources and reduce sewage pollution, but also reduce heat pollution. [0003] However, there are also some problems in the closed circulation cooling water system. These problems mainly include three categ...

Claims

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Application Information

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IPC IPC(8): C02F5/10C02F5/12C23F11/18
CPCC02F5/105C02F5/125C23F11/18C02F2303/08
Inventor 陈晓波蒋璨陈礼华陈煜辉李希
Owner SHENZHEN CHANGLONG TECH CO LTD
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