CN111977770A - Indirect air-cooling circulating water corrosion inhibition and water quality index control medicament formula - Google Patents
Indirect air-cooling circulating water corrosion inhibition and water quality index control medicament formula Download PDFInfo
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- CN111977770A CN111977770A CN202010591139.3A CN202010591139A CN111977770A CN 111977770 A CN111977770 A CN 111977770A CN 202010591139 A CN202010591139 A CN 202010591139A CN 111977770 A CN111977770 A CN 111977770A
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- circulating water
- indirect air
- medicament
- cooling circulating
- water
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/02—Non-contaminated water, e.g. for industrial water supply
- C02F2103/023—Water in cooling circuits
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention discloses a formula of a corrosion inhibition and water quality index control medicament for indirect air cooling circulating water, wherein the corrosion inhibition and water quality index control medicament is a mixed medicament: sequentially adding a plurality of medicament components with good intermiscibility into deionized water in sequence, and fully dissolving and dispersing to prepare the water-soluble emulsion. The formula of the medicament needs to determine the ratio of the medicaments of each component according to the type of metal materials related to an indirect air-cooling circulating water system and the control requirement of pH value. After the agent is added into an indirect air-cooling circulating water system according to a certain proportion, the corrosion speed of a metal material of the system is reduced, and on the other hand, the pH value control index of water quality can be ensured to meet the requirement.
Description
Technical Field
The invention relates to a chemical formula for inhibiting corrosion of indirect air-cooling circulating water and controlling water quality indexes, in particular to a thermal power generating unit adopting an indirect air-cooling system in large quantity in the north, which often causes leakage caused by equipment damage due to corrosion of the indirect air-cooling circulating water system and influences the safe and stable operation of the unit. The risk of such problems is reduced by the use of the formulations of the present invention.
Background
In northern areas of China, drought and water shortage are serious, and air cooling units are gradually becoming the dominant machines of northern power plants. The intermediate cooling unit has the advantages of water saving and heat exchange efficiency of air cooling and wet cooling, and the occupation ratio of the intermediate cooling unit in the air cooling unit is increased year by year. An indirect air cooling circulating water system relates to large-scale equipment such as a circulating water pump, a circulating water pipeline, a valve, a surface condenser, a radiator and the like. Generally, a circulating water pump, a circulating water pipeline and a valve are all made of carbon steel, a surface condenser heat exchanger is made of stainless steel, and a radiator is made of pure aluminum, copper alloy, stainless steel and the like according to factory design. According to different types of materials related to a circulating water system, the pH value of the circulating water at present has two control indexes, namely 7.0-8.5 or 9.2-9.6. Because the circulating water of the indirect air cooling unit mostly adopts desalted water or reverse osmosis effluent, the sealing performance of the system can not be completely ensured, along with the continuous leakage of air, the corrosivity of water quality presents an ascending trend, and the heat exchanger leakage caused by corrosion frequently occurs in a serious power plant, so that a technology for controlling corrosion under the condition of control indexes aiming at different circulating water pH values is urgently needed.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a chemical formula for inhibiting corrosion of indirect air cooling circulating water and controlling water quality indexes, which is used for solving the problems that equipment is damaged and the operation and maintenance workload is increased due to corrosion leakage of a northern indirect air cooling unit, so that the economical efficiency and the equipment safety and stability of a power generation enterprise are seriously influenced.
The technical scheme adopted by the invention for solving the problems is as follows: a formula of an indirect air-cooling circulating water corrosion inhibition and water quality index control agent is characterized in that 1.0-15.0 wt% of QX0508 and 0.3-15.0 wt% of a deoxidant are sequentially added into deionized water; wherein QX0508 is a key component, the rest is an auxiliary component, the use temperature of the medicament is 15-75 ℃, and the QX0508 is formed by mixing sodium silicate, borax, hexamethylenetetramine, sodium dihydrogen phosphate and glycine;
when metal materials such as carbon steel, copper alloy, aluminum alloy and the like are involved in the system and the pH value is required to be controlled within the range of 7.0-8.5, the content of each component in the QX0508 is as follows in sequence: 0.5-10.0% of sodium silicate, 1.0-10.0% of borax, 0.1-1.0% of hexamethylenetetramine and 0.1-10.0% of glycine, and sequentially adding the components into the rest of desalted water according to the sequence to dissolve to prepare a medicament;
when carbon steel and stainless steel metal materials are involved in the system and the pH value is required to be controlled within the range of 9.2-9.6, the content of each component in QX0508 is as follows in sequence: 0.5-5.0% of sodium silicate, 1.0-10.0% of sodium dihydrogen phosphate, 0.1-1.0% of hexamethylenetetramine and 0.1-1.0% of glycine, and sequentially adding the components into the rest desalted water according to the sequence to dissolve to obtain the medicament.
The formula of the agent of the invention needs to determine the ratio of the agents of each component according to the types of materials of indirect air cooling system equipment and analysis data of sulfate radicals, chloride radicals, dissolved oxygen and the like of the water quality of circulating water.
Unless otherwise indicated, percentages in the present invention are percentages by mass.
Compared with the prior art, the invention has the following advantages and effects: the invention is mainly used for a circulating water system with the temperature of an indirect air cooling unit of a power plant being in the range of 15-75 ℃, ensures that the pH value of water quality of the circulating water system is in an index requirement range, obviously reduces the corrosion speed of metal materials in the system, and ensures that heat exchange equipment can stably run for a long time within design parameters.
Detailed Description
The present invention is further illustrated by the following examples, which are illustrative of the present invention and are not to be construed as being limited thereto.
Example 1
Sequentially adding 15.0 wt% of QX0508 and 3.0 wt% of deoxidant into an indirect air-cooling circulating water sample, and when the pH value of the circulating water is controlled within the range of 7.0-8.5 and the temperature is 75 +/-1 ℃, respectively measuring the corrosion rates of various metal materials by adopting a weight loss method: carbon steel (0.0101 mm. a)-1) Pure aluminum (0.0437 mm. a)-1) Copper alloy (0.0028 mm. a)-1) (ii) a The corrosion rates of the non-chemical added corrosion agents were respectively carbon steel (0.9653 mm. alpha.)-1) Pure aluminum (0.1982 mm. a)-1) Copper alloy (0.0095 mm. a)-1）。
Example 2
Sequentially adding 10.0 wt% of QX0508 and 7.0 wt% of deoxidant into an indirect air-cooling circulating water sample, and when the pH value of the circulating water is controlled within the range of 7.0-8.5 and the temperature is 55 +/-1 ℃, respectively measuring the corrosion rates of various metal materials by adopting a weight loss method: carbon steel (0.0083 mm. a)-1) Pure aluminum (0.0326 mm. a)-1) Copper alloy (0.0017 mm. a)-1) (ii) a The corrosion rates of the non-chemical added corrosion agents were respectively carbon steel (0.9017 mm. alpha.)-1) Pure aluminum (0.1758 mm. a)-1) Copper alloy (0.0090 mm. a)-1）。
Example 3
5.0 wt% QX0508, 10.0 wt% oxygen removalThe agent is sequentially added into an indirect air-cooling circulating water sample, when the pH value of the circulating water is controlled within the range of 7.0-8.5, and under the condition of the temperature of 35 +/-1 ℃, the corrosion rates of various metal materials measured by a weight loss method are respectively as follows: carbon steel (0.0091 mm. a)-1) Pure aluminum (0.0377 mm. a)-1) Copper alloy (0.0019 mm. a)-1) (ii) a The corrosion rates of the non-chemical added corrosion agents were respectively carbon steel (0.9160 mm. alpha.)-1) Pure aluminum (0.1795 mm. a)-1) Copper alloy (0.0083 mm. a)-1）。
Example 4
Sequentially adding 3.0 wt% of QX0508 and 12.0 wt% of deoxidant into an indirect air-cooling circulating water sample, and when the pH value of the circulating water is controlled within the range of 9.2-9.6 and the temperature is 25 +/-1 ℃, respectively measuring the corrosion speeds of various metal materials by adopting a weight loss method: carbon steel (0.0088 mm. a)-1) Pure aluminum (0.0791 mm. a)-1) Copper alloy (0.0021 mm. a)-1) (ii) a The corrosion rates of the non-chemical added corrosion agents were respectively carbon steel (0.2734 mm. alpha.)-1) Pure aluminum (0.2039 mm. a)-1) Copper alloy (0.0090 mm. a)-1）。
Example 5
Sequentially adding 1.0 wt% of QX0508 and 15.0 wt% of deoxidant into an indirect air-cooling circulating water sample, and when the pH value of the circulating water is controlled within the range of 9.2-9.6 and the temperature is 15 +/-1 ℃, respectively measuring the corrosion speeds of various metal materials by adopting a weight loss method: carbon steel (0.0071 mm. a)-1) Pure aluminum (0.0662 mm. a)-1) Copper alloy (0.0016 mm. a)-1) (ii) a The corrosion rates of the non-chemical added corrosion agents were respectively carbon steel (0.1952 mm. alpha.)-1) Pure aluminum (0.2136 mm. alpha.)-1) Copper alloy (0.0077 mm. alpha.)-1）。
Those not described in detail in this specification are well within the skill of the art.
Although the present invention has been described with reference to the above embodiments, it should be understood that the scope of the present invention is not limited thereto, and that various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the present invention.
Claims (1)
1. A formula of an indirect air-cooling circulating water corrosion inhibition and water quality index control agent is characterized in that 1.0-15.0 wt% of QX0508 and 0.3-15.0 wt% of a deoxidant are sequentially added into deionized water; wherein QX0508 is a key component, the rest is an auxiliary component, the use temperature of the medicament is 15-75 ℃, and the QX0508 is formed by mixing sodium silicate, borax, hexamethylenetetramine, sodium dihydrogen phosphate and glycine;
when the system requires that the pH value is controlled within the range of 7.0-8.5, the contents of all components in the QX0508 are as follows in sequence: 0.5-10.0% of sodium silicate, 1.0-10.0% of borax, 0.1-1.0% of hexamethylenetetramine and 0.1-10.0% of glycine, and sequentially adding the components into the rest of desalted water according to the sequence to dissolve to prepare a medicament;
when the system requires that the pH value is controlled within the range of 9.2-9.6, the contents of all components in the QX0508 are as follows in sequence: 0.5-5.0% of sodium silicate, 1.0-10.0% of sodium dihydrogen phosphate, 0.1-1.0% of hexamethylenetetramine and 0.1-1.0% of glycine, and sequentially adding the components into the rest desalted water according to the sequence to dissolve to obtain the medicament.
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| CN202010591139.3A CN111977770A (en) | 2020-06-24 | 2020-06-24 | Indirect air-cooling circulating water corrosion inhibition and water quality index control medicament formula |
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| CN202010591139.3A CN111977770A (en) | 2020-06-24 | 2020-06-24 | Indirect air-cooling circulating water corrosion inhibition and water quality index control medicament formula |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012148206A (en) * | 2011-01-17 | 2012-08-09 | Kurita Water Ind Ltd | pH ADJUSTER OF BOILER WATER AND OPERATION METHOD OF BOILER |
| GB201302839D0 (en) * | 2013-02-19 | 2013-04-03 | Edwards Alan J | Water Treatment |
| CN103172183A (en) * | 2013-03-28 | 2013-06-26 | 哈尔滨工程大学 | Water treatment corrosion inhibitor and water treatment agent containing same |
| CN103319009A (en) * | 2012-03-21 | 2013-09-25 | 中国石油化工股份有限公司 | Method for applying desalinated seawater to circulating cooling water system |
| CN104556429A (en) * | 2013-10-24 | 2015-04-29 | 中国石油化工股份有限公司 | Water treatment medicament composition and application thereof |
| CN107673489A (en) * | 2017-11-14 | 2018-02-09 | 昌邑市龙港无机硅有限公司 | A kind of recirculated water corrosion inhibiting and descaling agent |
-
2020
- 2020-06-24 CN CN202010591139.3A patent/CN111977770A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012148206A (en) * | 2011-01-17 | 2012-08-09 | Kurita Water Ind Ltd | pH ADJUSTER OF BOILER WATER AND OPERATION METHOD OF BOILER |
| CN103319009A (en) * | 2012-03-21 | 2013-09-25 | 中国石油化工股份有限公司 | Method for applying desalinated seawater to circulating cooling water system |
| GB201302839D0 (en) * | 2013-02-19 | 2013-04-03 | Edwards Alan J | Water Treatment |
| CN103172183A (en) * | 2013-03-28 | 2013-06-26 | 哈尔滨工程大学 | Water treatment corrosion inhibitor and water treatment agent containing same |
| CN104556429A (en) * | 2013-10-24 | 2015-04-29 | 中国石油化工股份有限公司 | Water treatment medicament composition and application thereof |
| CN107673489A (en) * | 2017-11-14 | 2018-02-09 | 昌邑市龙港无机硅有限公司 | A kind of recirculated water corrosion inhibiting and descaling agent |
Non-Patent Citations (1)
| Title |
|---|
| 朱仁良等: "《宝钢大型高炉操作与管理》", 30 September 2015, 冶金工业出版社 * |
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Application publication date: 20201124 |