Natural balance ultrahigh concentration multiple and zero emission control method for circulating cooling water system

A technology of circulating cooling water and concentration multiples, which is applied to chemical instruments and methods, water softening, descaling and water softening, etc. It can solve the problems of zero discharge and acid addition, improve safety, reduce environmental hazards, The effect of avoiding secondary pollution

Pending Publication Date: 2022-08-05
TIANJIN ZHENGDA SCI &TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to ensure a good water treatment effect, the technical level of functional chemicals developed in different eras determines that the concentration ratio of the cooling water system presents different levels, from 2-3 times to 4-5 times. In recent years, some

Method used

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  • Natural balance ultrahigh concentration multiple and zero emission control method for circulating cooling water system

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Embodiment 1

[0034] In the circulating cooling water system of a steel plant, the natural balance ultra-high concentration ratio and zero-emission control method are applied. In the early stage of normal operation of the system, high-efficiency corrosion-inhibiting and scale-inhibiting functional chemicals are continuously added, with a ratio of 40% polyepoxysuccinic acid. , tracer type scale inhibitor and dispersant 5%, citric acid 10%, zinc sulfate 1%, 4-imidazoline 3%, benzotriazole 0.5%, the rest is water, the dosage is 200mg / L, the system is running After 30 days, the dosage can be reduced to 100mg / L; polyepoxysuccinic acid is a commercially available liquid preparation with a solid content of 40% and a molecular formula of HO (C 4 H 2 O 5 M 2 )nH, the degree of polymerization n is an integer of 6-20.

[0035] When the sum of calcium hardness and total alkalinity in the circulating water reaches 1200mg / L, high-efficiency micro-foam evaporation pre-precipitation functional chemicals...

Embodiment 2

[0041] In a petrochemical plant circulating cooling water system, the natural balance ultra-high concentration ratio and zero-emission control method are applied. The system starts to continuously add high-efficiency corrosion- and scale-inhibiting functional chemicals within 30 days before the initial operation of the system. The ratio is polyepoxy amber Acid 20%, tracer type scale inhibitor and dispersant 2%, tartaric acid 10%, zinc chloride 2%, 4-imidazoline 5%, mercaptobenzotriazole 1%, the rest is water, the dosage is 120mg / L, the dosage will be reduced to 60mg / L after the system runs for 30 days;

[0042] When the sum of calcium hardness and total alkalinity in circulating water reaches 1200mg / L, high-efficiency micro-foam evaporation pre-precipitation functional chemicals are added, and the ratio is 8% acrylic acid-acrylate-propylene sulfonate copolymer; alkane base betaine 10%; the rest is water, the dosage is 100mg / L; acrylic acid-acrylate-propylene sulfonate copolym...

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Abstract

The invention discloses a natural balance ultrahigh concentration multiple and zero emission control method for a circulating water system. The method comprises the steps that at the initial stage of operation, efficient scale and corrosion inhibition functional chemicals are continuously added into a circulating cooling water pond, the concentration of the efficient scale and corrosion inhibition functional chemicals is maintained to be 100-200 mg/L, after circulation is conducted for 20-30 days, the concentration is controlled to be maintained to be 50-100 mg/L, the chemicals are circulated along with circulating water to reach a heat exchanger, and part of water returns to the circulating cooling water pond after being filtered; when the sum of the calcium hardness and the total alkalinity in the circulating water exceeds 1200 mg/L, high-efficiency micro-foam evaporation pre-precipitation functional chemicals are added into the circulating cooling water tank, the adding concentration is 10-100 mg/L, and micro-foam evaporation pre-precipitation softening treatment is carried out; when the turbidity of the circulating water is greater than or equal to (4-10) NTU or the total iron is greater than or equal to (0.5-1) mg/L, adding an enhanced filtration functional chemical with the adding concentration of 0.5-10 mg/L into a circulating cooling water tank, performing enhanced filtration, directly recycling filtered water to a circulating water system, discharging dirt along with backwashing water, performing water-slag separation on the backwashing water, returning the separated water to the circulating water system, and discharging separated filter residues.

Description

technical field [0001] The invention belongs to the technical field of circulating cooling water treatment, and in particular relates to a natural balance ultra-high concentration ratio and zero emission control method of a circulating cooling water system. Background technique [0002] With the scarcity of potable water resources and increasingly strict environmental regulations, more and more regions and enterprises have put forward strict restrictions on water consumption and sewage discharge, saving water and reducing emissions, utilizing medium (waste) water resources, and realizing green development. It has become one of the important strategies for the sustainable development of more and more enterprises. [0003] Over the years, industrial cooling water treatment technology has been making continuous iterative progress in terms of increasing the concentration ratio, developing functional chemicals and operating processes suitable for high concentration ratio water tr...

Claims

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Application Information

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IPC IPC(8): C02F9/10C02F1/00C02F5/02C02F5/10C02F5/12
CPCC02F9/00C02F1/00C02F5/02C02F5/105C02F5/125C02F2103/023C02F1/04C02F2001/5218C02F2303/08C02F1/001C02F2209/11C02F2305/04C02F2301/08C02F2303/16
Inventor 吴新国王乃琳肖知蔡朝阳李放王潇姜宝安刘家节顿士超马景辉
Owner TIANJIN ZHENGDA SCI &TECH CO LTD
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