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Scale inhibitor used for heating network of boiler and preparation method thereof

A scale inhibitor, heat network technology, applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc. High problems, to achieve the effect of strong descaling ability, strong adaptability and good water solubility

Inactive Publication Date: 2017-02-22
JIANGSU JINGWEI TECH INNOVATION CONSULTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The invention provides a scale inhibitor for boiler heating network and its preparation method, which solves the technical problems of low scale inhibition rate, high corrosion rate, low tolerance and high phosphorus content rate of existing scale inhibitors

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The first step: weigh according to the ratio of parts by mass: 100 parts of deionized water; 6 parts of carbohydrazide; 5 parts of methyl ethyl ketone oxime; 3 parts of acetone oxime; 10 parts of ATMP; 5 parts of sodium hydroxide; 2 parts of thiourea; 1 part of alkylphenol polyoxyethylene ether; 4.5 parts of dioctyl succinate; 5 parts of nano-modified kaolin.

[0026] Step 2: Put acetone oxime, ATMP, sodium hydroxide and methyl ethyl ketoxime into a reaction kettle equipped with a thermometer, a heating device and a stirring device, raise the temperature to 60°C, stir for 40 minutes, and the stirring speed is 80 rpm.

[0027] Step 3: Cool down to 20°C, add nano-modified kaolin and remaining raw materials, and stir for 1 hour.

[0028] Wide range of sources of raw materials, good water solubility, no deposition, no side effects, and no secondary scale; the phosphorus value in the external drainage is 0.05mg / L, strong adaptability, high temperature resistance of 150°C, an...

Embodiment 2

[0030] The first step: weigh according to the ratio of parts by mass: 100 parts of deionized water; 10 parts of carbohydrazide; 25 parts of methyl ethyl ketone oxime; 7 parts of acetone oxime; 30 parts of ATMP; 6 parts of thiourea; 5 parts of alkylphenol polyoxyethylene ether; 8.5 parts of dioctyl succinate; 9 parts of nano-modified kaolin.

[0031] Step 2: Put acetone oxime, ATMP, sodium hydroxide and methyl ethyl ketone oxime into a reaction kettle equipped with a thermometer, a heating device and a stirring device, raise the temperature to 80°C, stir for 60 minutes, and the stirring speed is 120 rpm.

[0032] Step 3: Cool down to 30°C, add nano-modified kaolin and remaining raw materials, and stir for 3 hours.

[0033] Wide range of sources of raw materials, good water solubility, no deposition, no side effects, and no secondary scaling; the phosphorus value in the external drainage is 0.25 mg / L, strong adaptability, high temperature resistance of 250 ° C, no need to adjust...

Embodiment 3

[0035]The first step: weigh according to the ratio of parts by mass: 100 parts of deionized water; 7 parts of carbohydrazide; 10 parts of methyl ethyl ketone oxime; 4 parts of acetone oxime; 15 parts of ATMP; 10 parts of sodium hydroxide; 3 parts of thiourea; 2 parts of alkylphenol polyoxyethylene ether; 5.5 parts of dioctyl succinate; 6 parts of nano-modified kaolin.

[0036] Step 2: Put acetone oxime, ATMP, sodium hydroxide and methyl ethyl ketoxime into a reaction kettle equipped with a thermometer, a heating device and a stirring device, raise the temperature to 60°C, stir for 40 minutes, and the stirring speed is 80 rpm.

[0037] Step 3: Cool down to 20°C, add nano-modified kaolin and remaining raw materials, and stir for 1 hour.

[0038] Wide range of sources of raw materials, good water solubility, no deposition, no side effects, and no secondary scale; the phosphorus value in the external drainage is 0.05mg / L, strong adaptability, high temperature resistance of 150°C, ...

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Abstract

A scale inhibitor used for a heating network of a boiler comprises the following raw materials: deionized water, carbohydrazide, methyl ethyl ketone oxime, acetone oxime, ATMP (Amino Trimethylene Phosphonic Acid), sodium hydroxide, zinc sulfate, thiourea, alkylphenol ethoxylates, maleic anhydride and nano modified kaolin. The scale inhibitor cannot deposit, has no side effect and cannot generate secondary scale; the value of phosphorus in discharge water is 0.05-0.25mg / L, the scale inhibitor has high adaptability and can resist high temperature of 150-250 DEG C, and the pH value does not need to be adjusted when drugs are added; a synergistic effect is generated among all the ingredients, the rate of corrosion to carbon steel is 0.01-0.03mum a <-1>, the scale inhibition rate to calcium carbonate is 95.5-99.5%, and the scale inhibitor is convenient to use, has low cost and simple process and can be widely used.

Description

technical field [0001] The invention relates to an environment-friendly material, in particular to a scale inhibitor for a boiler heating network and a preparation method thereof. Background technique [0002] Scale inhibitor: It is a class of agents that can disperse insoluble inorganic salts in water, prevent or interfere with the precipitation and scaling of insoluble inorganic salts on metal surfaces, and maintain good heat transfer effects on metal equipment . [0003] From the perspective of the mechanism of action, the role of scale inhibitors can be divided into three parts: chelation, dispersion and lattice distortion. And in the laboratory evaluation test, the dispersion effect is the remedial measure of the chelation effect, and the lattice distortion effect is the remedial measure of the dispersion effect. [0004] Corrosion can cause huge economic losses. For hot water boilers, corrosion not only leads to reduced service life and greatly increased maintenance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/14C02F5/10C02F5/12
CPCC02F5/145C02F5/105C02F5/125
Inventor 王静
Owner JIANGSU JINGWEI TECH INNOVATION CONSULTING CO LTD
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