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Special scale inhibitor for MVR system and preparation method thereof

A technology of antiscalant and acrylic acid, which is applied in chemical instruments and methods, descaling and water softening, heating water/sewage treatment, etc. It can solve problems such as lack of pertinence, unsatisfactory treatment effect, and influence on salt production rate. To achieve the effect of promoting energy saving and emission reduction, best application effect and production value, and excellent scale inhibition and dispersibility

Inactive Publication Date: 2020-03-27
SHANDONG TIANQING TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the antiscalants for MVR systems in the market are conventional high-temperature antiscalants. These antiscalants are not targeted at silicate and sulfate scales, resulting in unsatisfactory treatment effects, especially in silicate scale inhibition.
Secondly, the use of conventional scale inhibitors will affect the output rate of salt, making it difficult to crystallize and precipitate when the salt is separated.

Method used

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  • Special scale inhibitor for MVR system and preparation method thereof
  • Special scale inhibitor for MVR system and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Preparation of maleic anhydride-acrylic acid-methallyl polyoxyethylene ether scale inhibitor:

[0021] Mix and stir 20 parts by weight of NaOH and 150 parts by weight of distilled water until dissolved, then add 30 parts by weight of maleic anhydride, add 10 parts by weight of methallyl polyoxyethylene ether after dissolving, heat to 85°C, add 4 parts by weight of sodium hypophosphite, and slowly add ammonium persulfate and acrylic acid at the same time, fully stir when adding, and keep warm for 1.5 hours to obtain maleic anhydride-acrylic acid-methallyl polyoxyethylene ether scale inhibitor.

Embodiment 2

[0023] Preparation of a special antiscalant for MVR system:

[0024] Weigh acrylic acid-styrene sulfonic acid copolymer by weight 8 parts, PAPEMP15 parts, HDTMPA10 parts, maleic anhydride-acrylic acid-methallyl polyoxyethylene ether scale inhibitor 20 parts, acrylic acid-2-acrylamide-2-methylpropanesulfonic acid-N-tert-butyl Acrylamide Terpolymer 7 parts, adipic acid-amino-terminated polyether-diethylenetriamine copolymer 10 parts, epoxy succinic acid derivative 10 parts, acrylic acid-hydroxypropyl acrylate-sodium hypophosphite copolymer 5 parts, pure water 0 parts.

[0025] Add the above weighed materials into the reaction kettle in turn, and mix well; then slowly add 12 parts by weight of phosphate starch from the manhole into the reaction kettle, raise the temperature to 45°C, stir for 20min, filter, and discharge to obtain the MVR system dedicated Inhibitor.

Embodiment 3

[0027] Preparation of a special antiscalant for MVR system:

[0028] Weigh acrylic acid-styrene sulfonic acid copolymer by weight 5 parts, 10 parts of PAPEMP, 5 parts of HDTMPA, 15 parts of maleic anhydride-acrylic acid-methallyl polyoxyethylene ether scale inhibitor, acrylic acid-2-acrylamide-2-methylpropanesulfonic acid-N-tert-butyl Acrylamide Terpolymer 5 parts, adipic acid-amino-terminated polyether-diethylenetriamine copolymer 8 parts, epoxy succinic acid derivative 15 parts, acrylic acid-maleic acid-phosphorus-based copolymer 8 parts, pure water 8 parts.

[0029] Add the above weighed materials into the reaction kettle in turn, and mix well; then slowly add 10 parts by weight of phosphate starch from the manhole into the reaction kettle, raise the temperature to 50°C, stir for 30min, filter, and discharge to obtain the MVR system dedicated Inhibitor.

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Abstract

The invention discloses a special scale inhibitor for an MVR system. The special scale inhibitor for the MVR system is composed of the following raw materials: an acrylic acid-styrene sulfonate copolymer, organic phosphonic acid, an allyl polyoxyethylene polycarboxylic acid scale inhibitor, an acrylic acid-2-acrylamide-2-methylpropanesulfonic acid-N-tert-butyl acrylamide terpolymer, an adipic acid-amine-terminated polyether-diethylenetriamine copolymer, an epoxysuccinic acid derivative, a phosphorus-containing polymer, phosphate starch and pure water. Aiming at researching the high-temperature, high-silicon and high-sulfate-radical water quality of the MVR system, the special scale inhibitor for the MVR system is prepared; the scale inhibitor has excellent scale inhibition dispersibility on sulfate, silicate and carbonate, does not influence later crystallization and salt separation, has excellent application effect and production value, and is beneficial to promoting energy conservation and emission reduction, waste salt utilization and zero emission development of enterprises.

Description

technical field [0001] The invention belongs to the field of water treatment agents, and in particular relates to a special scale inhibitor for MVR systems and a preparation method thereof. Background technique [0002] Water resources are one of the important energy sources for economic development. With the continuous advancement of industrialization, the contradiction between the rapid development of industry and the relative shortage of water resources has become increasingly prominent. In industrial production, a large amount of waste water recycling has become an effective method for water saving and environmental protection. Means, in order to improve the utilization rate of water resources and meet environmental protection requirements, many enterprises use MVR and other devices to treat high-hardness wastewater, effectively achieving zero discharge. [0003] Evaporator fouling means that the concentrated salt wastewater contains a large amount of impurity salt, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/14C02F5/10C02F1/04
CPCC02F1/041C02F1/042C02F5/10C02F5/14
Inventor 张留成刘娅林梁清雷郭翠娟徐旭东纪春玲谢泽新高松郑萍赵继光
Owner SHANDONG TIANQING TECH DEV
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