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A kind of scale inhibitor for MVR evaporator and preparation method thereof

A scale inhibitor and evaporator technology, which is applied in the field of scale inhibitor for MVR evaporator and its preparation, can solve the problems of large consumption of cleaning agents and high labor intensity, so as to reduce the growth of bacteria and algae, prolong the cleaning cycle, and improve the production efficiency. simple craftsmanship

Active Publication Date: 2019-07-02
SCI GREEN SHANDONG ENVIRONMENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] When dealing with wastewater with high hardness and high COD, the MVR evaporator is easy to construct. Generally, it needs to be cleared once every 15 days, and it takes 3-5 days for each clearing. It needs to consume a lot of cleaning agents, and the labor intensity is high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A company uses domestic MVR to treat pesticide wastewater. The hardness of the wastewater is 35640mg / l, and the COD is 46780mg / l. Normally, it needs to be cleaned once every 15 days. After using the scale inhibitor of the present invention, the cleaning cycle reaches 40-45 days .

[0021] The scale inhibitor preparation process of the present invention is:

[0022] (1) Weigh 20 parts of hydrolyzed polymaleic anhydride in reaction kettle A by mass parts, add 5 parts of benzotriazole sodium, 8 parts of styrene-acrylic acid-maleic anhydride-aminopropanesulfonic acid quaternary copolymerization substance, stir to dissolve;

[0023] (2) Weigh 5 parts of isothiazolinone, 25 parts of polyaspartic acid, 40 parts of acrylic acid and 2-acrylamide-2-methylpropanesulfonic acid copolymer in parts by mass, 12 parts Hexamethylenetetramine, 15 parts of polydienyl propylene dimethyl ammonium chloride, stirred evenly;

[0024] (3) Add the solution in Reactor A to Reactor B, stir evenl...

Embodiment 2

[0026] A company uses MVR equipment imported from Canada to treat chemical wastewater. The hardness of the wastewater is 9650mg / l, and the COD is 6780mg / l. It is normally cleaned once every 45 days. After using the scale inhibitor of the present invention, the cleaning cycle reaches 140-160 days .

[0027] The scale inhibitor preparation process of the present invention is:

[0028] (1) Weigh 10 parts of hydrolyzed polymaleic anhydride in reaction kettle A by mass parts, add 2 parts of benzotriazole sodium, 5 parts of styrene-acrylic acid-maleic anhydride-aminopropanesulfonic acid quaternary copolymerization substance, stir to dissolve;

[0029] (2) Weigh 1 part of isothiazolinone, 15 parts of polyaspartic acid, 25 parts of acrylic acid and 2-acrylamide-2-methylpropanesulfonic acid copolymer in parts by mass, 5 parts Hexamethylenetetramine, 8 parts of polydienyl propylene dimethyl ammonium chloride, stir evenly;

[0030] (3) Add the solution in reactor A to reactor B, stir ...

Embodiment 3

[0032] A company uses domestic MVR to treat pesticide wastewater. The wastewater has a hardness of 21830mg / l and a COD of 29480mg / l. Normally, it needs to be cleaned once every 30 days. After using the scale inhibitor of the present invention, the cleaning cycle reaches 90-100 days .

[0033] The scale inhibitor preparation process of the present invention is:

[0034] (1) Weigh 15 parts of hydrolyzed polymaleic anhydride in reaction kettle A by mass parts, add 3 parts of benzotriazole sodium, 7 parts of styrene-acrylic acid-maleic anhydride-aminopropanesulfonic acid quaternary copolymerization substance, stir to dissolve;

[0035] (2) In reactor B, weigh 3 parts of isothiazolinone, 20 parts of polyaspartic acid, 32 parts of acrylic acid and 2-acrylamide-2-methylpropanesulfonic acid copolymer, 9 parts Hexamethylenetetramine, 12 parts of polydienyl propylene dimethyl ammonium chloride, stirred evenly;

[0036] (3) Add the solution in Reactor A to Reactor B, stir evenly, add ...

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Abstract

The invention relates to the technical field of zero discharge of wastewater and particularly discloses a scale inhibitor for an MVR evaporator and a preparation method of the scale inhibitor. The scale inhibitor for the MVR evaporator is prepared by mixing styrene-acrylic acid-maleic anhydride-aminopropanesulfonic acid tetra-copolymer, isothiazolinone, polyaspartic acid, acrylic acid, 2-acrylamide-2-methylpropanesulfonic acid copolymer, hydrolytic polymaleic anhydride, hexamethylenetetramine, sodium benzotriazole and polydiallyldimethylammonium chloride in water in certain proportion by weight. The ingredients of the product disclosed by the invention are safe and environment-friendly; the production process is simple; and aiming at a high scale inhibition rate of high-hardness high-COD wastewater treated by the MVR evaporator, the cleaning period can be prolonged by more than one time.

Description

[0001] (1) Technical field [0002] The invention relates to the technical field of waste water zero discharge, in particular to a scale inhibitor for an MVR evaporator and a preparation method thereof. [0003] (2) Background technology [0004] A large amount of wastewater is produced in industrial production, which is an important source of wastewater that pollutes the environment. Many companies use MVR evaporators to treat wastewater with high hardness and high COD. [0005] When dealing with wastewater with high hardness and high COD, the MVR evaporator is easy to construct. Generally, it needs to be cleared once every 15 days. Each clearing takes 3-5 days. It needs to consume a lot of cleaning agents and is labor-intensive. [0006] (3) Contents of the invention [0007] In order to make up for the deficiencies of the prior art, the invention provides a scale inhibitor for MVR evaporators that delays scaling and prolongs the cleaning cycle and a preparation method there...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F5/12C02F101/30C02F103/34
CPCC02F5/12C02F2101/306C02F2103/343
Inventor 田民格史海岭郭传鸿杨庆军殷树梅孙婷
Owner SCI GREEN SHANDONG ENVIRONMENT TECH CO LTD