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Low-phosphorus environment-friendly corrosion and scale inhibitor applied to low-temperature circulating water system, and preparation method of low-phosphorus environment-friendly corrosion and scale inhibitor

A technology of circulating water system and corrosion and scale inhibitor, which is applied in the field of water treatment, can solve problems such as not being able to meet production needs, not being ideal, and affecting the normal operation of equipment, and achieve long effective service life, stable chemicals, and low phosphorus content. Effect

Active Publication Date: 2017-12-15
鞍钢栗田(鞍山)水处理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Phosphorus-based water treatment chemicals are commonly used in industrial circulating water. There are relatively few water treatment chemicals suitable for low-temperature circulating cooling water systems. At present, most of them are still using phosphorus-based water treatment chemicals. It is relatively high, and the heat exchange equipment and refrigeration equipment are in good condition in the initial stage of operation, but with the increase of the concentration ratio in the water, the salt content in the water is close to saturation, and a large amount of phosphate begins to precipitate, and due to the co-precipitation, the carbonate is also precipitated, and finally forms The scale mainly composed of calcium phosphate and calcium carbonate seriously affects the normal operation of the equipment, so the use of phosphorus-based water treatment agents with too high total phosphorus is not ideal in inhibiting scaling and cannot meet production needs

Method used

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  • Low-phosphorus environment-friendly corrosion and scale inhibitor applied to low-temperature circulating water system, and preparation method of low-phosphorus environment-friendly corrosion and scale inhibitor
  • Low-phosphorus environment-friendly corrosion and scale inhibitor applied to low-temperature circulating water system, and preparation method of low-phosphorus environment-friendly corrosion and scale inhibitor
  • Low-phosphorus environment-friendly corrosion and scale inhibitor applied to low-temperature circulating water system, and preparation method of low-phosphorus environment-friendly corrosion and scale inhibitor

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Experimental program
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Effect test

Embodiment 1

[0064] The composite agent of the present invention configured according to the above method was subjected to scale inhibition performance experiment, referring to the static scale inhibition evaluation test method in Sinopec's "Cooling Water Analysis and Test Method", and the temperature in the refrigeration constant temperature water bath was controlled at 10 ± 1 °C for carbonic acid Calcium deposition experiment, calcium phosphate deposition experiment, zinc salt deposition experiment, the experiment time is 10 hours. Ca before and after detection after the experiment 2+ 、PO 4 3- , Zn 2+ Mass concentration, calculate the corresponding scale inhibition rate, the experimental results are shown in Table 1.

[0065] Table 1: Static scale inhibition test results

[0066]

[0067]

[0068] It can be seen from Table 1 that all the compound formulations of each group have good scale inhibition effects, among which formula 1 has the best scale inhibition rate of 98.85% for...

Embodiment 2

[0070] The circulating water volume of the low-temperature circulating cooling water system in an oxygen plant is 15000m 3 / h, the total water retention is 9000m 3 , The material of the equipment is mainly carbon steel, the water supply temperature of the refrigerating unit is 8-10 ℃, and the quality of the low-temperature circulating cooling water is shown in Table 2.

[0071] Table 2:

[0072]

[0073] Dosing each group of formulas at 30mg / L, when the total phosphorus in the circulating water is maintained at 1.0mg / L-1.5mg / L for 3 consecutive days, reduce the dosing concentration to 20mg / L, and carry out on-site industrial treatment for 1 month respectively The results of the simulation experiment, the temperature at the inlet and outlet of the refrigeration unit and the corrosion rate of the carbon steel coupons are shown in Table 3.

[0074] table 3:

[0075]

[0076] Note: The refrigeration efficiency is calculated according to the following formula:

[0077] ...

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Abstract

The invention provides a low-phosphorus environment-friendly corrosion and scale inhibitor applied to a low-temperature circulating water system. The low-phosphorus environment-friendly corrosion and scale inhibitor applied to the low-temperature circulating water system comprises the following components in parts by mass: 8 to 27 parts of 2-hydroxyphosphonoacetic acid, 13 to 31 parts of carboxyethyl thiosuccinic acid, 5 to 20 parts of disodium tetraborate decahydrate, 7 to 25 parts of polymethylacrylic acid, 1 to 18 parts of zinc chloride and 29 to 60 parts of deionized water. Compared with the prior art, the low-phosphorus environment-friendly corrosion and scale inhibitor has the beneficial effects of suitability for the low-temperature circulating water system and excellent effect of inhibiting low-temperature scale; the composite agent has better effect of inhibiting calcium carbonate, calcium phosphate and zinc salt deposition along with the increment of use amount under the condition of low temperature; the composite agent has low phosphorus content and meets the national environmental protection requirement; the components of the composite agent have synergistic effect; meanwhile, the medicament prepared by the method provided by the invention is more stable and has longer effective life.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a low-phosphorus, environment-friendly corrosion and scale inhibitor applied to a low-temperature circulating water system and a preparation method. Background technique [0002] The water supply temperature of cooling equipment in industrial low-temperature circulating cooling water system is generally ≤10°C, which is mainly used for cooling equipment such as special heat exchangers, condensers, and air cooling towers. For this kind of low-temperature circulating cooling water system, phosphorus-based composite corrosion and scale inhibitors are mainly used at present. [0003] Phosphorus-based water treatment chemicals are commonly used in industrial circulating water. There are relatively few water treatment chemicals suitable for low-temperature circulating cooling water systems. At present, most of them are still using phosphorus-based water treatment chemicals. It ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/14C02F103/02
CPCC02F5/145C02F2103/023C02F2303/08C02F2303/22
Inventor 张柏鸿李华北胡文军王坤鹏李俊峰王志成陈奇李红褚运伟陈丽鹏
Owner 鞍钢栗田(鞍山)水处理有限公司
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