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Dirt dispersion agent for ultra-high-rate operation of circulating cooling water

A scale inhibitor and dispersant, multi-rate technology, applied in the field of water treatment, can solve the problems of large amount of compounding, narrow water quality adaptation range and high use concentration, and achieve the effect of improving operating index and good scale inhibition and dispersion effect.

Inactive Publication Date: 2017-12-15
SHANDONG TIANQING TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN105481115A discloses a corrosion and scale inhibitor, which is composed of polyamino polyether group methylene phosphonic acid, zinc salt, dispersant, copper corrosion inhibitor and water. If the normal operating ratio is not higher than 5 times, the ideal scale inhibition and dispersion effect cannot be achieved for water quality exceeding 6 times
[0005] At present, domestic water treatment manufacturers and the "Industrial Circulating Cooling Water Treatment Design Regulations" require cooling water treatment parameters: calcium hardness (in terms of CaCO 3 In terms of) + methyl orange alkalinity (as CaCO 3 Total) ≤ 1100mg / L, but this index is far from meeting the technical requirements of zero emission, which brings great pressure to the follow-up treatment
In addition, the currently used antiscalant and dispersant products have a high concentration, a large amount of compounding, and a narrow range of adaptation to water quality.

Method used

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  • Dirt dispersion agent for ultra-high-rate operation of circulating cooling water
  • Dirt dispersion agent for ultra-high-rate operation of circulating cooling water
  • Dirt dispersion agent for ultra-high-rate operation of circulating cooling water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Preparation of polyamino polyether group methylene phosphonic acid:

[0037] 1) Amino-terminated polyether and phosphorous acid are added to the reactor at a molar ratio of 1:4, and sulfuric acid with a mass fraction of phosphorous acid (calculated as sulfuric acid) of 7% and partially demineralized water are added;

[0038] 2) Keep the reaction temperature at about 45°C for 1 hour, raise the temperature to 100°C, condense and reflux, and slowly add formaldehyde dropwise to the solution for not less than 1 hour, and the molar ratio of amino-terminated polyether to formaldehyde is 1:5 ;

[0039] 3) After the dropwise addition of formaldehyde is completed, continue to heat and reflux for about 2 hours at a temperature not less than 105°C.

[0040] 4) Distill under reduced pressure, finally add a certain amount of demineralized water, and mix well to obtain a qualified liquid product.

Embodiment 2

[0043] A scale inhibitor dispersant composition for ultra-high rate operation of circulating cooling water, the mass percentage of each component is composed of:

[0044]

[0045] The amino-terminated polyether used in the preparation of the polyamino polyether group methylene phosphonic acid is the amino-terminated polyether D2000.

Embodiment 3

[0047] A scale inhibitor dispersant composition for ultra-high rate operation of circulating cooling water, the mass percentage of each component is composed of:

[0048]

[0049]The amino-terminated polyether used in the preparation of the polyamino-polyether-based methylene phosphonic acid is amino-terminated polyether D230.

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PUM

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Abstract

The invention discloses a dirt dispersion agent for an ultra-high-rate operation. The dirt dispersion agent comprises the following components in percentage by mass: 20-40% of polyamino polyether methylene phosphonates, 5-15% of amino trimethylene phosphonic acid, 5-20% of polymaleic anhydride, 2-20% of a zinc salt and 5-25% of poly(acrylic acid-co-hydroxypropyl acrylate). The dirt dispersion agent disclosed by the invention has an excellent dirt dispersion effect.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a scale-inhibiting dispersant for ultra-high-rate operation of circulating cooling water in the zero-discharge technology of factory water systems. Background technique [0002] Water is the basic condition for human survival, but water resources in the world are limited. my country's per capita water volume is only a quarter of the world's per capita water volume, and water resources are even poorer. With the rapid development of industry, the ecological balance of water has been seriously damaged day by day. In order to solve the water resource crisis and adapt to sustainable development, it is necessary to save water reasonably. The amount of cooling water in industrial water accounts for 60-80% by weight of the total water consumption. Therefore, the main goal of saving industrial water is to recycle cooling water, improve the reuse rate as much as possi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/14C02F103/02C02F103/10C02F103/08
CPCC02F5/145C02F2103/023C02F2103/08C02F2103/10
Inventor 王俊明梁清雷郭翠娟刘晓民王金明苗吉宾郑萍张少尉
Owner SHANDONG TIANQING TECH DEV
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