Composite scale inhibitor as well as preparation method and application thereof

A composite antiscalant and equipment technology, applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc., can solve problems such as material corrosion, reduce equipment life, and reduce production capacity, and achieve durable Good chlorine oxidation performance, reduced treatment costs, and reduced production rate

Inactive Publication Date: 2011-04-27
自贡市轻工业设计研究院有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the production of salt, the fouling of pipelines such as the evaporation tank, heating chamber and preheater of the main equipment of salt production is a common problem in the salt production industry. Once the salt production equipment and related pipelines are scaled, the effective volume of equipment and pipelines will be reduced. , so that the heat transfer efficiency is reduced, the production conditions are deteriorated, and the production capacity is reduced. Severe fouling will also force the production to stop, shorten the effective production time, reduce the life of the equipment or even damage the equipment, and increase the consumption of raw materials and energy.
[0003] At present, the usual method is to stop production from time to time for cleaning and descalin

Method used

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  • Composite scale inhibitor as well as preparation method and application thereof
  • Composite scale inhibitor as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041]Prepare 24.2kg of scale inhibitors by adopting the ratio of binary composite scale inhibitor provided by the present invention, wherein polyaspartic acid 12.1kg, hydroxyethylidene diphosphonic acid (HEDP) 12.1kg, mix, stir evenly, adjust to pH2 .0. Then it was applied in the test solution required by "GB / T 16632-2008 Calcium Carbonate Deposition Method for Determination of Scale Inhibition Performance of Water Treatment Agents" according to the addition amount of 10mg / L, and the static scale inhibition test was carried out. The experimental results were: the scale inhibition rate reached 94.1%.

Embodiment 2

[0043] Prepare 12kg of scale inhibitors using the ratio of binary composite scale inhibitors provided by the present invention, including 2kg of polyaspartic acid and 10kg of hydroxyethylidene diphosphonic acid (HEDP), mix and stir evenly, and adjust to pH 1.0. Then, according to the addition amount of 12mg / L, it was applied to the test solution required by "GB / T 16632-2008 Calcium Carbonate Deposition Method for Determination of Scale Inhibition Performance of Water Treatment Agents", and the static scale inhibition test was carried out. The experimental results are: the scale inhibition rate reaches 94.2%.

Embodiment 3

[0045] Prepare 20kg of scale inhibitors by using the ratio of binary composite scale inhibitors provided by the present invention, including 5kg of polyaspartic acid and 15kg of hydroxyethylidene diphosphonic acid (HEDP), mix and stir evenly, and adjust to pH 3.0. Then, according to the addition amount of 15mg / L, it was applied to the test liquid required by "GB / T 16632-2008 Calcium Carbonate Deposition Method for Determination of Scale Inhibition Performance of Water Treatment Agents", and the static scale inhibition test was carried out. The experimental results were: the scale inhibition rate reached 95.2%.

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Abstract

The invention discloses a composite scale inhibitor, comprising sodium polyaspartate and hydroxy-ethylidene-di-phosphonic acid in the mass ratio of 1:20-1:1. The composite scale inhibitor can be prepared by mixing the sodium polyaspartate with the hydroxy-ethylidene-di-phosphonic acid according to the mixture ratio, adjusting the pH value to be 1-5 and uniformly stirring. The composite scale inhibitor is applied to equipment for preparing salts and is especially suitable for mirabilite type brine vacuum equipment for preparing salt; and when the composite scale inhibitor is applied, the addition of refined brine water is 5-25mg/L. The binary composite scale inhibitor has favorable scale inhibiting effect and corrosion inhibiting effect, thereby effectively preventing the system and the equipment for preparing salts from being scaled due to the continuous enrichment of calcium and magnesium ions in the mirabilite type brine water; and the scale inhibiting rate is over 94 percent. Whenin use, the composite scale inhibitor is simple for preparation, convenient for operation and relatively low in cost, so that the composite scale inhibitor has favorable practicability and the use value.

Description

technical field [0001] The invention relates to a composite scale inhibitor, in particular to a composite scale inhibitor for salt making equipment, a preparation method and application thereof. Background technique [0002] In the production of salt, the fouling of pipelines such as the evaporation tank, heating chamber and preheater of the main equipment of salt production is a common problem in the salt production industry. Once the salt production equipment and related pipelines are scaled, the effective volume of equipment and pipelines will be reduced. , so that the heat transfer efficiency is reduced, the production conditions are deteriorated, and the production capacity is reduced. Severe fouling will also force the production to stop, shorten the effective production time, reduce the life of the equipment or even damage the equipment, and increase the consumption of raw materials and energy. [0003] At present, the usual method is to stop production from time to t...

Claims

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Application Information

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IPC IPC(8): C02F5/14
Inventor 李红卫刘昌辉李静徐夷李波
Owner 自贡市轻工业设计研究院有限责任公司
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