Composite slow-release scale inhibitor suitable for petrochemical wastewater reusing circulating water system

A technology for circulating water systems and petrochemical sewage, applied in water/sludge/sewage treatment, descaling and water softening, chemical instruments and methods, etc., can solve problems such as high cost, difficult operation of covering protective layer, complex internal structure, etc. , to achieve the effects of low production and use costs, good corrosion and scale inhibition effects, and easy access to raw materials

Active Publication Date: 2014-12-24
GUANGDONG UNIV OF PETROCHEMICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for the large-scale circulating cooling equipment that has been put into use, the internal structure is complicated, the operation of covering the protective layer is difficult, and the cost is high

Method used

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  • Composite slow-release scale inhibitor suitable for petrochemical wastewater reusing circulating water system
  • Composite slow-release scale inhibitor suitable for petrochemical wastewater reusing circulating water system
  • Composite slow-release scale inhibitor suitable for petrochemical wastewater reusing circulating water system

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Effect test

Embodiment 1

[0030] The corrosion inhibitor in Example 1 has a scale inhibition rate of 87.42%. A dynamic simulation experiment was carried out on the reuse water of an oil refinery. The corrosion inhibition rate was 86.18%, and the corrosion rate had dropped to 0.0168 mm / a; a dynamic simulation experiment was carried out on the reuse water of an ethylene plant. , the corrosion inhibition rate is 86.44%, and the corrosion rate has dropped to 0.0091 mm / a, which meets the anti-corrosion requirement of Sinopec's circulating cooling water with a corrosion rate of less than 0.075 mm / a.

[0031] Taking the product RP-98 (polyphosphorus carboxylate compound slow-release scale inhibitor) of a chemical company in Maoming as a comparison, the scale inhibition rate of the agent is 90.34%, and when the dosage is 100mg / L, the dynamic simulation of the reuse water of the refinery is carried out In the experiment, the corrosion inhibition rate was 89.54%, and the corrosion rate was 0.0034 mm / a; the dynami...

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Abstract

The invention discloses a composite slow-release scale inhibitor suitable for a petrochemical wastewater reusing circulating water system. The composite slow-release scale inhibitor comprises 2-butane phosphate-1,2,4-tricarboxylic acid, hydroxy ethylidene diphosphonic acid, amino trimethylene phosphonic acid and zinc sulfate. After the composite slow-release scale inhibitor is adopted, by virtue of dynamic simulation experiment on oil refinery reuse water, the water quality inhibition rate is 86.18%; by virtue of the dynamic simulation experiment on ethylene plant reuse water, the water quality inhibition rate is 86.44%, and the scale inhibiting rate is 87.42%; the corrosion rate is reduced to 0.0168 mm/a and 0.0091 mm/a, which meets the anticorrosion requirement that the corrosion rate of China petrochemical circulating cooling water is less than 0.075 mm/a. Compared with the traditional polyphosphate carboxylate composite slow-release scale inhibitor, the composite slow-release scale inhibitor disclosed by the invention has the advantages of small addition amount and good corrosion inhibition effect and scale inhibition.

Description

technical field [0001] The invention relates to a novel water treatment agent, in particular to a compound slow-release scale inhibitor suitable for petrochemical sewage reuse circulating water systems. Background technique [0002] Industrial enterprises are large users of water and sewage, especially in the petrochemical industry. The lack of water resources and large sewage discharge have become two bottlenecks hindering the development of my country's petrochemical industry. According to the data in Sinopec's 2012 sustainable development report, the average fresh water intake for processing tons of crude oil is about 0.55t / t, and the average sewage discharge is 0.27t / t. The annual water intake and sewage discharge per ton of oil processed have reached 0.3t and 0.14t respectively. In the 1970s, the world oil tycoon Shell’s waste water discharge per ton of oil has also been reduced by 0.19t. Therefore, the rapidly developing petrochemical industry is one of the five key w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/14
Inventor 朱越平李德豪伊帆郎春燕殷旭东
Owner GUANGDONG UNIV OF PETROCHEMICAL TECH
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