CN106809963B - Phosphorus-free and sodium-free boiler water treatment agent - Google Patents
Phosphorus-free and sodium-free boiler water treatment agent Download PDFInfo
- Publication number
- CN106809963B CN106809963B CN201710127999.XA CN201710127999A CN106809963B CN 106809963 B CN106809963 B CN 106809963B CN 201710127999 A CN201710127999 A CN 201710127999A CN 106809963 B CN106809963 B CN 106809963B
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- Prior art keywords
- boiler
- free
- water
- sodium
- phosphorus
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Classifications
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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
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
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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
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/12—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing nitrogen
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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
- C02F2303/00—Specific treatment goals
- C02F2303/08—Corrosion inhibition
Abstract
The invention relates to a phosphorus-free and sodium-free boiler water treatment agent, which consists of polymaleic anhydride, polyepoxysuccinic anhydride, organic ammonia, benzo compounds and water. The multifunctional phosphorus-free and sodium-free boiler internal treatment agent comprises all organic polymers, efficient dispersing agents, auxiliary agents and the like. The following reaction is carried out, so that hard scale in boiler water is chelated and dispersed, scaling is prevented, potential corrosion caused by total deposition of iron, copper and the like in a furnace tube office is prevented, the PH of the boiler water is stabilized, the corrosion problem of pipelines and valves is reduced, the use of sodium phosphate can be fundamentally replaced, entrainment is prevented, and the steam quality is improved. The critical salt content of the boiler is improved, the concentration of boiler water is facilitated, and energy is saved.
Description
Technical Field
The invention relates to a boiler water treatment agent, in particular to an agent for treating boiler water.
Background
The boiler water is water flowing through the boiler body system, and is usually purified water, but the water still contains dissolved oxygen, chlorine ions, calcium ions, magnesium ions, silica, and soluble solidified substances such as electric conductivity and alkalinity. The furnace water is continuously evaporated and concentrated, and a part of the furnace water is taken out along with the steam and deposited in equipment such as a steam turbine, a gas compressor and the like, so that the salt is accumulated in the equipment; part of the water is left in the furnace to form scale after chemical reaction. Generally, the need for dosing and the solution by alignment and concatenation is required.
Typical boiler water agents (high pressure and below boilers) consist primarily of phosphates and co-ordinating PH-phosphates. Phosphates and co-ordinating PH-phosphates only serve to prevent scaling and alkaline corrosion in the furnace, but because of the high requirements on the dosage of the added agents and the level of plant management, acid salts and co-ordinating PH-phosphate agents for boiler water treatment have not been satisfactory. The boiler water treatment agent is an important direction for combining the functions of corrosion inhibition, scale inhibition, pH regulation, steam quality enhancement, bubble entrainment reduction and the like. Among various boiler water treatment agents, phosphorus-free low-sodium boiler water treatment agents and phosphorus-free sodium-free boiler water treatment agents are most attractive at present, and world-known enterprises including Nakelike America, GE America and the like also put forward related products in 2009. However, domestic related research is still in the preliminary research stage of laboratories at present, and the technology needs to be applied as soon as possible to meet the requirements of domestic boiler water treatment agents, save energy and reduce emission, further protect the environment and ensure the stable and safe development of boilers.
Disclosure of Invention
The purpose of the invention is as follows: aiming at the problems in the existing water treatment agent, the invention provides the corrosion and scale inhibitor for boiler water, which can effectively inhibit the generation of scale, promote the passivation of metal in a boiler, fundamentally replace sodium phosphate, stabilize the pH value of the boiler water and improve the steam quality.
The technical scheme is as follows:
a phosphorus-free and sodium-free boiler water treatment agent comprises the following components:
polymaleic anhydride;
polyepoxy succinic anhydride;
organic amines;
a benzo compound;
and (3) water.
The phosphorus-free and sodium-free boiler water treatment agent is preferably:
the medicament comprises the following components in percentage by weight:
0.1 to 30 percent of polymaleic anhydride;
0.1 to 30 percent of polyepoxysuccinic anhydride;
0.1 to 30 percent of organic ammonia;
0.1-30% of benzo compound;
10 to 90 percent of water.
The phosphorus-free and sodium-free boiler water treatment agent does not contain phosphorus element and sodium element.
The water treatment agent for the phosphorus-free and sodium-free boiler is colorless to light yellow liquid.
The phosphorus-free and sodium-free boiler water treatment agent is preferably: the pH value of the 1% aqueous solution of the medicament is not lower than 9.8; the density at 20 ℃ is not less than 1.01g/cm3, and the activity content is not less than 10.0%.
The water treatment agent for the phosphorus-free and sodium-free boiler is suitable for boiler feed water which is demineralized water, the hardness of the water treatment agent is not more than 2ppm, and the hardness is CaCO3Counting; the boiler pressure does not exceed 18.3 MPa.
The invention has the advantages and effects that:
1, increasing the PH value of condensed water;
2, reducing bubble entrainment and enhancing steam quality;
3, reducing the boiler pollution discharge rate by at least 2 percent.
The specific implementation mode is as follows:
the agent does not contain phosphorus element and sodium element, and consists of a synergistic polymer and a high-efficiency dispersant. The preparation is colorless to yellowish alkaline liquid, is easily soluble in water, has pH value (1% water solution) of not less than 9.8, density (20 deg.C) of not less than 1.01g/cm3, and active content of not less than 10.0%. The invention is used without mixing with strong acid and oxidizing substances, sulfite catalysts or amine inhibitors.
The medicament comprises the following components in percentage by weight:
0.1 to 30 percent of polymaleic anhydride;
0.1 to 30 percent of polyepoxysuccinic anhydride;
0.1 to 30 percent of organic ammonia;
0.1-30% of benzo compound;
10 to 90 percent of water.
The preparation method of the medicament comprises the following steps:
adding water, adding medicaments in proportion (the medicaments are not added in sequence), and stirring in the whole process.
The boiler feed water suitable for the present invention is demineralized water, the hardness of which is recommended to be not more than 2ppm (as CaCO)3Meter), the boiler pressure is recommended not to exceed 18.3 MPa. The water treatment agent is continuously added into the boiler or the water supply through a special dosing device. When the boiler is used, the stock solution or the mixed solution diluted to a certain degree by the desalted water can be added into the boiler. The amount of the additive depends on the pH value of the boiler water or the feed water and the quality index of the steam.
The invention relates to a water treatment agent for a phosphorus-free and sodium-free boiler, which is a multifunctional phosphorus-free and sodium-free boiler treatment agent comprising all organic polymers, efficient dispersants, auxiliaries and the like. The following reaction is carried out, so that hard scale in boiler water is chelated and dispersed, scaling is prevented, potential corrosion caused by total deposition of iron, copper and the like in a furnace tube office is prevented, the PH of the boiler water is stabilized, the corrosion problem of pipelines and valves is reduced, the use of sodium phosphate can be fundamentally replaced, entrainment is prevented, and the steam quality is improved. The critical salt content of the boiler is improved, the concentration of boiler water is facilitated, and energy is saved.
The deposits or slimes are chelated by the organic polymer and dispersed and regulated into a non-sticky, free-flowing form that can be easily continuously discharged through the boiler. The iron and copper oxides are also regulated to a non-sticky, free-flowing, water-soluble form that will not form hard scale deposits on boiler surfaces and prevent local galvanic corrosion, and the organic polymers will also provide corrosion protection by forming a passivation layer on the metal surface. Eliminating the negative effects of using conventional phosphate agents; effectively inhibiting the generation of scale and sediment in the boiler and preventing the scaling problem of the boiler tube; the silicon-containing water-soluble paint has good solubilizing performance on silicon, prevents the entrainment phenomenon of silicon and reduces the generation of polymerized silicon by stabilizing the pH value of boiler water; the interior of the boiler is kept clean, the heat transfer efficiency is improved, and the metal of the boiler is passivated; effectively eliminating foam, reducing the entrainment phenomenon of water and air bubbles in the boiler, having no influence on steam engines and further improving the quality of steam; the dispersion agent has good dispersion performance on iron, controls the generation of iron sediments and prevents potential corrosion; the liquid product is non-toxic and non-irritant, and is safe and convenient to use and operate.
The effects of the present invention will be described with specific examples:
example 1
Applying a medicament with the concentration of 10%, wherein the medicament comprises the following components in percentage by weight:
30% of polymaleic anhydride;
30% of polyepoxysuccinic anhydride;
20% of organic ammonia;
10% of benzo compound;
10 percent of water.
5 times of experiments are carried out, and SiO in furnace water, superheated steam and saturated steam is measured2The contents and the pH value are respectively as follows:
example 2
Applying a medicament with the concentration of 15%, wherein the medicament comprises the following components in percentage by weight:
10% of polymaleic anhydride;
10% of polyepoxysuccinic anhydride;
30% of organic ammonia;
30% of benzo compound;
and 20% of water.
5 times of experiments are carried out, and SiO in furnace water, superheated steam and saturated steam is measured2The contents and the pH value are respectively as follows:
it can be seen that the data measured in the two embodiments all play a role in improving the PH value of the condensed water, reducing the entrainment of bubbles, enhancing the steam quality and reducing the boiler pollution discharge rate.
Claims (4)
1. The phosphorus-free and sodium-free boiler water treatment agent is characterized in that:
the medicament comprises the following components in percentage by weight:
polymaleic anhydride: 0.1% -30%;
polyepoxysuccinic anhydride: 0.1% -30%;
organic amines: 0.1% -30%;
benzo compounds: 0.1% -30%;
water: 10% -90%;
the pH value of 1% water solution of the preparation is not less than 9.8, and the density at 20 deg.C is not less than 1.01g/cm3The active content is not less than 10.0%.
2. The agent for treating boiler water without phosphorus and sodium according to claim 1, wherein: the preparation does not contain phosphorus element and sodium element.
3. The agent for treating boiler water without phosphorus and sodium according to claim 1, wherein: the medicament is colorless to light yellow liquid.
4. The agent for treating boiler water without phosphorus and sodium according to claim 1, wherein: the boiler feed water suitable for the agent is desalted water, the hardness of the boiler feed water is not more than 2ppm, and the hardness isWith CaCO3Counting; the boiler pressure is not more than 18.3 Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710127999.XA CN106809963B (en) | 2017-03-06 | 2017-03-06 | Phosphorus-free and sodium-free boiler water treatment agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710127999.XA CN106809963B (en) | 2017-03-06 | 2017-03-06 | Phosphorus-free and sodium-free boiler water treatment agent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106809963A CN106809963A (en) | 2017-06-09 |
| CN106809963B true CN106809963B (en) | 2020-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710127999.XA Active CN106809963B (en) | 2017-03-06 | 2017-03-06 | Phosphorus-free and sodium-free boiler water treatment agent |
Country Status (1)
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU629898B2 (en) * | 1989-02-14 | 1992-10-15 | Fmc Corporation (Uk) Limited | Polymerisation of maleic anhydride |
| CA2368445C (en) * | 1999-03-26 | 2008-02-12 | Calgon Corporation | Rust and scale removal composition and process |
| CN102452721A (en) * | 2010-10-20 | 2012-05-16 | 中国石油化工股份有限公司 | Phosphorus-free composite scale-inhibiting corrosion-retarding agent and application thereof in water treatment |
| CN102030420B (en) * | 2011-01-04 | 2012-07-25 | 王仲贤 | Phosphorus-free boiler water treating agent |
| CN104355419A (en) * | 2014-12-03 | 2015-02-18 | 天津天和环能科技有限公司 | Multifunctional scale and corrosion inhibitor and preparation method thereof |
| CN104891684B (en) * | 2015-05-25 | 2016-11-02 | 山东英联化学科技有限公司 | Without phosphorus composite slow-corrosion scale resistor for bitter recirculated water and preparation method thereof |
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2017
- 2017-03-06 CN CN201710127999.XA patent/CN106809963B/en active Active
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Effective date of registration: 20220322 Address after: 100043 room 336, floor 3, building 1, Gucheng North Road comprehensive commercial building, Shijingshan District, Beijing Patentee after: Beijing Low Carbon Technology Co.,Ltd. Address before: 110168 Room 806, block B, Jialong center, No. 6, Tiancheng street, Hunnan New District, Shenyang, Liaoning Patentee before: Wang Zhongxian |
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