CN113428926A - Deoxidant for boiler water treatment and preparation method thereof - Google Patents
Deoxidant for boiler water treatment and preparation method thereof Download PDFInfo
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- CN113428926A CN113428926A CN202110765112.6A CN202110765112A CN113428926A CN 113428926 A CN113428926 A CN 113428926A CN 202110765112 A CN202110765112 A CN 202110765112A CN 113428926 A CN113428926 A CN 113428926A
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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
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
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Abstract
The invention discloses a deoxidant for boiler water treatment, which comprises the following raw materials in parts by weight: 12-15 parts of oxime compound, 4-6 parts of hydroxylamine compound, 15-20 parts of neutralized amine, 6-8 parts of isoascorbic acid, 1-2 parts of tetramethyl-p-phenylenediamine, 1-2 parts of lignin, 2-3 parts of algal polysaccharide and 60-65 parts of deionized water. The invention adopts unique amine combination to provide good deoxidization effect for boiler feed water, steam and condensed water system treatment; the volatile oxygen scavenger with the neutralization function effectively adsorbs oxygen and neutralizes carbonic acid, and simultaneously provides a pre-film function for steel in a water supply system, a steam system and a condensed water system; the boiler can be operated under the condition of high concentration multiple (extremely low pollution discharge rate) of 150 times and 200 times; the method has no influence on the conductivity/TDS of the boiler water, can slowly remove old corrosive substances in a steam system and a condensed water system, and has wide application prospect.
Description
Technical Field
The invention relates to a deoxidant for boiler water treatment and a preparation method thereof, in particular to a deoxidant for high-pressure and ultrahigh-pressure boiler water treatment and a preparation method thereof, belonging to the technical field of green environment-friendly deoxidants.
Background
With the rapid development of industrial industry in China, boiler equipment is used more and more in the industrial production process. Boiler often can discover in the long-term operation course that parts such as the inside water-cooled wall of boiler, economizer, convection current pipeline, boiler section of thick bamboo can be because of water quality problem produces corruption and scale deposit phenomenon, can directly cause boiler metal's table wall thickness more and more high, can cause many-sided problems such as metal wall perforation even under the serious condition, wherein more serious is the oxygen corrosion problem, probably can cause the inside important metal parts of boiler to receive destruction. When the pipeline is seriously corroded, even pipeline explosion accidents can happen. Therefore, the method has important effects of deoxidizing boiler water, guaranteeing safe operation of the boiler and improving boiler efficiency.
In the traditional boiler deoxygenation work, the boiler water supply work usually can directly use the method of thermal deoxygenation, through the method of thermal deoxygenation, can effectively prevent the inside water of boiler from receiving the heat and producing the problem of maintenance corrosion, fully guarantee the normal work and the operation of boiler, but in the in-service use, because long-time load work, the method of thermal deoxygenation can cause boiler equipment's self load to have certain instability situation inside the boiler system, the regulation of the water yield also can have certain problem simultaneously, therefore ultimate deoxygenation effect can not reach the expectation. Under the background, the chemical deoxidant is widely applied, redundant nutrients in a water body can be thoroughly cleaned through reasonable use of a chemical deoxidant working method, and a large amount of sediments formed by reaction between certain substances in a boiler and oxygen are effectively prevented from being gradually accumulated in boiler equipment. Through the use of chemical deoxidization technique, can realize the inside water quality of boiler, be in a qualified working standard all the time, can effectively get rid of the water impurity in the middle of the boiler equipment, effectively guarantee pH valve and salinity in the middle of the boiler water, keep in a normal balanced operating condition.
Although the chemical oxygen scavenger has a good oxygen removal effect, the conventional oxygen scavengers still have many disadvantages, such as hydrazine, sodium sulfite, oxime compounds, hydroxylamine compounds, hydrazine carbonate and the like, and the use conditions of the conventional oxygen scavengers are limited, so that the novel oxygen scavenger for boiler water treatment becomes a hotspot of research and development, for example, patent CN201910341975.3 discloses a high-efficiency oxygen scavenger for boiler water supply, and the oxygen scavenger is prepared from the following raw materials in percentage by weight: 8-15% of organic amine modified lignin, 10-18% of erythorbic acid, 2-4% of polyepoxysuccinic acid, 1-3% of polyaspartic acid, 4-6% of pH regulator, 0.4-0.8% of tetramethyl-p-phenylenediamine, 0.2-0.4% of carbazide, 0.1-0.4% of methyl ethyl ketoxime and the balance of water; the organic amine modified lignin and the isoascorbic acid are jointly used as the oxygen scavenger, the organic amine modified lignin has the function of absorbing oxygen, can reduce dissolved oxygen in water, is beneficial to forming a protective oxide layer on the surface of metal by the isoascorbic acid, can balance the concentration of a deoxidizer system in a gas phase/liquid phase at different temperatures of boiler water, improves the oxygen-removing corrosion inhibition effect, solves the corrosion problem of a boiler, a pipeline and a heat exchanger, and has the main action mechanism of absorbing oxygen. Patent CN201910381184.3 discloses an environment-friendly boiler deoxidant, which is prepared from the following raw materials in parts by weight: the oxygen scavenger is characterized in that 10-30 parts of oxime-containing compound, 6-12 parts of amino heterocyclic compound, 6-15 parts of hydrazide derivative, 2-8 parts of hydroxylamine compound, 12-20 parts of neutralized amine, 0.2-3 parts of catalyst and 15-70 parts of desalted water, although the oxygen scavenger has a good oxygen scavenging effect, the oxygen scavenger is still mainly a traditional oxygen scavenger, and therefore, the development of a novel efficient oxygen scavenger is the key for solving the technical problems. In addition, the research on the water deoxidant of the high-pressure and ultrahigh-pressure boiler is relatively less at present, and the integration and transformation of key technologies are urgently needed.
Disclosure of Invention
In order to overcome the defects of the prior art, improve the deoxidization effect of boiler water treatment, and particularly meet the requirements of high-pressure and ultrahigh-pressure boiler water deoxidization, the invention provides the deoxidization agent for boiler water treatment and the preparation method thereof. In addition, the boiler water deoxidant disclosed by the invention is non-toxic, harmless, free of emission, green, environment-friendly and safe.
The invention realizes the technical effects through the following technical scheme:
the deoxidant for boiler water treatment is characterized by comprising the following raw materials in parts by weight: 10-20 parts of oxime compound, 4-10 parts of hydroxylamine compound, 10-20 parts of neutralized amine, 5-10 parts of isoascorbic acid, 1-2 parts of tetramethyl-p-phenylenediamine, 1-2 parts of lignin, 2-3 parts of algal polysaccharide and 50-70 parts of deionized water.
Preferably, the deoxidant for boiler water treatment is characterized by comprising the following raw materials in parts by weight: 12-15 parts of oxime compound, 4-6 parts of hydroxylamine compound, 15-20 parts of neutralized amine, 6-8 parts of isoascorbic acid, 1-2 parts of tetramethyl-p-phenylenediamine, 1-2 parts of lignin, 2-3 parts of algal polysaccharide and 60-65 parts of deionized water.
Preferably, the deoxidant for boiler water treatment is characterized by comprising the following raw materials in parts by weight: 13 parts of oxime compound, 5 parts of hydroxylamine compound, 17 parts of neutralized amine, 7 parts of isoascorbic acid, 1.5 parts of tetramethyl-p-phenylenediamine, 1.5 parts of lignin, 2 parts of algal polysaccharide and 62 parts of deionized water.
Preferably, the oxime compound is one or a mixture of more of acetaldoxime, propionaldoxime, butyraldehyde oxime and dimethyl ketoxime.
Most preferably, the oxime compound is a mixture of acetaldoxime and dimethylketoxime, and the mass ratio of the acetaldoxime to the dimethylketoxime is 7: 3.
Preferably, the hydroxylamine compound is one of diethylhydroxylamine, diisopropylhydroxylamine, phenylhydroxylamine and diphenylhydroxylamine.
Preferably, the algal polysaccharide is one or a mixture of two of agar polysaccharide and carrageenan polysaccharide.
Most preferably, the algal polysaccharide is a mixture of agar polysaccharide and carrageenan polysaccharide, and the mass ratio of the algal polysaccharide to the carrageenan polysaccharide is 3: 1.
The invention also provides a preparation method of the deoxidant for treating boiler water, which comprises the following steps: adding deionized water into a reaction kettle, then adding an oxime compound into the reaction kettle, stirring for 10-15 min, then adding a hydroxylamine compound and a neutralizing amine into the reaction kettle, stirring for 20-30 min, finally adding isoascorbic acid, tetramethyl-p-phenylenediamine, lignin and algal polysaccharide into the reaction kettle, and stirring for 15-20 min to prepare the deoxidant for boiler water treatment.
Compared with the prior art, the invention has the following beneficial effects:
(1) the deoxidant for treating boiler water adopts unique amine combination to provide good deoxidization effect for the treatment of boiler feed water, steam and condensed water systems; the volatile oxygen scavenger with the neutralization function effectively adsorbs oxygen and neutralizes carbonic acid, and simultaneously provides a pre-film function for steel in a water supply system, a steam system and a condensed water system; the boiler can be operated under the condition of high concentration multiple (extremely low pollution discharge rate) of 150 times and 200 times;
(2) the invention replaces the traditional deoxidant products such as sulfite or hydrazine, and the like, and has no influence on the conductivity/TDS of the boiler water; the pre-filming and passivating effects are achieved on a boiler water supply system, a steam system and a condensed water system; in addition, old corrosives in steam systems and condensate systems can be removed slowly;
(3) when the product of the invention is used for a boiler system, the operating pressure of the boiler reaches or exceeds 100 bar;
(4) the product of the invention has the advantages of no toxicity, no harm, no emission and the like, and is green, environment-friendly and safe.
Detailed Description
The present invention will be further described with reference to the following embodiments.
In the following embodiments, the preparation method of the oxygen scavenger for boiler water treatment specifically includes the following steps: adding deionized water into a reaction kettle, then adding an oxime compound into the reaction kettle, stirring for 15min, then adding a hydroxylamine compound and a neutralizing amine into the reaction kettle, stirring for 30min, finally adding isoascorbic acid, tetramethyl-p-phenylenediamine, lignin and algal polysaccharide into the reaction kettle, and stirring for 20min to prepare the deoxidant for boiler water treatment.
Example 1
The deoxidant for boiler water treatment is characterized by comprising the following raw materials in parts by weight: 13 parts of oxime compound, 5 parts of hydroxylamine compound, 17 parts of neutralized amine, 7 parts of isoascorbic acid, 1.5 parts of tetramethyl-p-phenylenediamine, 1.5 parts of lignin, 2 parts of algal polysaccharide and 62 parts of deionized water; the oxime compound is a mixture of acetaldoxime and dimethylketoxime, and the mass ratio of the oxime compound to the dimethylketoxime is 7: 3; the hydroxylamine compound is diethylhydroxylamine, the seaweed polysaccharide is a mixture of agar polysaccharide and carrageenan polysaccharide, and the mass ratio of the seaweed polysaccharide to the carrageenan polysaccharide is 3: 1.
Example 2
The deoxidant for boiler water treatment is characterized by comprising the following raw materials in parts by weight: 13 parts of oxime compound, 5 parts of hydroxylamine compound, 17 parts of neutralization amine, 7 parts of isoascorbic acid, 1.5 parts of tetramethyl-p-phenylenediamine, 1.5 parts of lignin, 2 parts of agar polysaccharide and 62 parts of deionized water; the oxime compound is a mixture of acetaldoxime and dimethylketoxime, and the mass ratio of the oxime compound to the dimethylketoxime is 7: 3; the hydroxylamine compound is diethylhydroxylamine.
Example 3
The deoxidant for boiler water treatment is characterized by comprising the following raw materials in parts by weight: 13 parts of oxime compound, 5 parts of hydroxylamine compound, 17 parts of neutralized amine, 7 parts of isoascorbic acid, 1.5 parts of tetramethyl-p-phenylenediamine, 1.5 parts of lignin, 2 parts of carrageenan polysaccharide and 62 parts of deionized water; the oxime compound is a mixture of acetaldoxime and dimethylketoxime, the mass ratio of the oxime compound to dimethylketoxime is 7:3, and the hydroxylamine compound is diethylhydroxylamine.
Example 4
The deoxidant for boiler water treatment is characterized by comprising the following raw materials in parts by weight: 13 parts of oxime compound, 5 parts of hydroxylamine compound, 17 parts of neutralized amine, 7 parts of isoascorbic acid, 1.5 parts of tetramethyl-p-phenylenediamine, 1.5 parts of lignin, 2 parts of algal polysaccharide and 62 parts of deionized water; the oxime compound is a mixture of acetaldoxime and dimethylketoxime, and the mass ratio of the oxime compound to the dimethylketoxime is 7: 3; the hydroxylamine compound is diethylhydroxylamine, and the seaweed polysaccharide is a mixture of agar polysaccharide and carrageenan polysaccharide, wherein the mass ratio of the agar polysaccharide to the carrageenan polysaccharide is 1: 1.
Example 5
The deoxidant for boiler water treatment is characterized by comprising the following raw materials in parts by weight: 13 parts of oxime compound, 5 parts of hydroxylamine compound, 17 parts of neutralized amine, 7 parts of isoascorbic acid, 1.5 parts of tetramethyl-p-phenylenediamine, 1.5 parts of lignin, 2 parts of algal polysaccharide and 62 parts of deionized water; the oxime compound is acetaldoxime, the hydroxylamine compound is diethylhydroxylamine, and the seaweed polysaccharide is a mixture of agar polysaccharide and carrageenan polysaccharide, wherein the mass ratio of the agar polysaccharide to the carrageenan polysaccharide is 3: 1.
Example 6
The deoxidant for boiler water treatment is characterized by comprising the following raw materials in parts by weight: 13 parts of oxime compound, 5 parts of hydroxylamine compound, 17 parts of neutralized amine, 7 parts of isoascorbic acid, 1.5 parts of tetramethyl-p-phenylenediamine, 1.5 parts of lignin, 2 parts of algal polysaccharide and 62 parts of deionized water; the oxime compound is dimethyl ketoxime, the hydroxylamine compound is diethyl hydroxylamine, and the seaweed polysaccharide is a mixture of agar polysaccharide and carrageenan polysaccharide, wherein the mass ratio of the agar polysaccharide to the carrageenan polysaccharide is 3: 1.
Example 7
The deoxidant for boiler water treatment is characterized by comprising the following raw materials in parts by weight: 13 parts of oxime compound, 5 parts of hydroxylamine compound, 17 parts of neutralization amine, 7 parts of isoascorbic acid, 1.5 parts of tetramethyl-p-phenylenediamine, 1.5 parts of lignin, 2 parts of agar polysaccharide and 62 parts of deionized water; the oxime compound is acetaldoxime, and the hydroxylamine compound is diethylhydroxylamine.
Example 8
The deoxidant for boiler water treatment is characterized by comprising the following raw materials in parts by weight: 13 parts of oxime compound, 5 parts of hydroxylamine compound, 17 parts of neutralized amine, 7 parts of isoascorbic acid, 1.5 parts of tetramethyl-p-phenylenediamine, 1.5 parts of lignin, 2 parts of carrageenan polysaccharide and 62 parts of deionized water; the oxime compound is acetaldoxime, and the hydroxylamine compound is diethylhydroxylamine.
Example 9
The deoxidant for boiler water treatment is characterized by comprising the following raw materials in parts by weight: 15 parts of oxime compound, 4 parts of hydroxylamine compound, 20 parts of neutralized amine, 6 parts of isoascorbic acid, 2 parts of tetramethyl-p-phenylenediamine, 1 part of lignin, 3 parts of algal polysaccharide and 60 parts of deionized water; the oxime compound is a mixture of acetaldoxime and dimethylketoxime, and the mass ratio of the oxime compound to the dimethylketoxime is 7: 3; the hydroxylamine compound is diethylhydroxylamine, the seaweed polysaccharide is a mixture of agar polysaccharide and carrageenan polysaccharide, and the mass ratio of the seaweed polysaccharide to the carrageenan polysaccharide is 3: 1.
Example 10
The deoxidant for boiler water treatment is characterized by comprising the following raw materials in parts by weight: 12 parts of oxime compound, 6 parts of hydroxylamine compound, 15 parts of neutralized amine, 8 parts of isoascorbic acid, 1 part of tetramethyl-p-phenylenediamine, 2 parts of lignin, 2 parts of algal polysaccharide and 65 parts of deionized water; the oxime compound is a mixture of acetaldoxime and dimethylketoxime, and the mass ratio of the oxime compound to the dimethylketoxime is 7: 3; the hydroxylamine compound is diethylhydroxylamine, the seaweed polysaccharide is a mixture of agar polysaccharide and carrageenan polysaccharide, and the mass ratio of the seaweed polysaccharide to the carrageenan polysaccharide is 3: 1.
Example 11
Grouping: taking the deoxidant for boiler water treatment in the embodiment 1-10 as an experimental group, and meanwhile, setting a blank group; wherein comparative example 1 does not contain algal polysaccharide, the remainder of the same procedure as in example 1;
desalted water is used as water for simulating a high-pressure boiler, a 5000mL conical flask is blown for 2min by a carbon dioxide steel bottle, 5000mL of desalted water is added into the conical flask, and the conical flask is placed into a water bath kettle and heated to 80 ℃. And adding deoxidants of 60ppm of the experimental group and the control group into the conical flasks of each group respectively, reacting for 2min, detecting by using a portable dissolved oxygen detector respectively, and detecting by using a pH meter. The results of the experiment are shown in table 1:
table 1 examples 1-10 oxygen scavenging effect test results
| Examples | Dissolved oxygen content (ppm) | pH value of desalted water |
| Blank space | 3.35 | 6.07 |
| 1 | 0.0012 | 9.18 |
| 2 | 0.0107 | 8.62 |
| 3 | 0.0189 | 8.15 |
| 4 | 0.0077 | 8.89 |
| 5 | 0.0089 | 8.42 |
| 6 | 0.0076 | 8.79 |
| 7 | 0.0085 | 8.49 |
| 8 | 0.0098 | 8.38 |
| 9 | 0.0164 | 7.88 |
| 10 | 0.0113 | 8.14 |
| Comparative example 1 | 0.2483 | 7.35 |
The experimental results show that the deoxidant for boiler water treatment has obvious deoxidization effect, can obviously reduce the dissolved oxygen in the desalted water under lower concentration, has wide application prospect, and the series product A707 of the company has already realized industrialized application. In addition, the experimental result also shows that the proportion and the compatibility proportion of the raw materials have obvious influence on the oxygen removal effect of the product. For comparison, example 1 is the best mode of carrying out the invention.
The above embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; such modifications and substitutions do not depart from the spirit and scope of the present invention as set forth in the appended claims.
Claims (9)
1. The deoxidant for boiler water treatment is characterized by comprising the following raw materials in parts by weight: 10-20 parts of oxime compound, 4-10 parts of hydroxylamine compound, 10-20 parts of neutralized amine, 5-10 parts of isoascorbic acid, 1-2 parts of tetramethyl-p-phenylenediamine, 1-2 parts of lignin, 2-3 parts of algal polysaccharide and 50-70 parts of deionized water.
2. The oxygen scavenger for boiler water treatment according to claim 1, wherein the oxygen scavenger for boiler water treatment comprises the following raw materials in parts by weight: 12-15 parts of oxime compound, 4-6 parts of hydroxylamine compound, 15-20 parts of neutralized amine, 6-8 parts of isoascorbic acid, 1-2 parts of tetramethyl-p-phenylenediamine, 1-2 parts of lignin, 2-3 parts of algal polysaccharide and 60-65 parts of deionized water.
3. The oxygen scavenger for boiler water treatment according to claim 1, wherein the oxygen scavenger for boiler water treatment comprises the following raw materials in parts by weight: 13 parts of oxime compound, 5 parts of hydroxylamine compound, 17 parts of neutralized amine, 7 parts of isoascorbic acid, 1.5 parts of tetramethyl-p-phenylenediamine, 1.5 parts of lignin, 2 parts of algal polysaccharide and 62 parts of deionized water.
4. The oxygen scavenger for boiler water treatment according to claim 1, wherein the oxime compound is one or a mixture of more of acetaldoxime, propionaldoxime, butyraldoxime and dimethylketoxime.
5. The oxygen scavenger for boiler water treatment according to claim 1, wherein the oxime compound is a mixture of acetaldoxime and dimethylketoxime in a mass ratio of 7: 3.
6. The oxygen scavenger for boiler water treatment according to claim 1, wherein the hydroxylamine compound is one of diethylhydroxylamine, diisopropylhydroxylamine, phenylhydroxylamine and diphenylhydroxylamine.
7. The oxygen scavenger for boiler water treatment according to claim 1, wherein the algal polysaccharides are one or a mixture of two of agar polysaccharides and carrageenan polysaccharides.
8. The oxygen scavenger for boiler water treatment according to claim 1, wherein the algal polysaccharide is a mixture of agar and carrageenan polysaccharide, and the mass ratio of the algal polysaccharide to the carrageenan polysaccharide is 3: 1.
9. The oxygen scavenger for boiler water treatment according to claim 1, wherein the preparation method of the oxygen scavenger for boiler water treatment specifically comprises the following steps: adding deionized water into a reaction kettle, then adding an oxime compound into the reaction kettle, stirring for 10-15 min, then adding a hydroxylamine compound and a neutralizing amine into the reaction kettle, stirring for 20-30 min, finally adding isoascorbic acid, tetramethyl-p-phenylenediamine, lignin and algal polysaccharide into the reaction kettle, and stirring for 15-20 min to prepare the deoxidant for boiler water treatment.
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Citations (5)
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| JP2005103427A (en) * | 2003-09-30 | 2005-04-21 | Aquas Corp | Deoxidizer and deoxidation method |
| CN105174504A (en) * | 2015-09-30 | 2015-12-23 | 威海翔宇环保科技股份有限公司 | Environment-friendly deoxidant for boiler |
| CN108585228A (en) * | 2018-04-07 | 2018-09-28 | 侯文燕 | A kind of algal polysaccharides efficient boiler water modifier |
| CN109928447A (en) * | 2019-04-26 | 2019-06-25 | 汇科琪(天津)水质添加剂有限公司 | A kind of boiler feedwater high efficiency deoxidiser and the preparation method and application thereof |
| CN110156105A (en) * | 2019-05-08 | 2019-08-23 | 安徽省力皖节能环保科技有限公司 | A kind of environment-friendly boiler oxygen scavenger |
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2021
- 2021-07-07 CN CN202110765112.6A patent/CN113428926A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005103427A (en) * | 2003-09-30 | 2005-04-21 | Aquas Corp | Deoxidizer and deoxidation method |
| CN105174504A (en) * | 2015-09-30 | 2015-12-23 | 威海翔宇环保科技股份有限公司 | Environment-friendly deoxidant for boiler |
| CN108585228A (en) * | 2018-04-07 | 2018-09-28 | 侯文燕 | A kind of algal polysaccharides efficient boiler water modifier |
| CN109928447A (en) * | 2019-04-26 | 2019-06-25 | 汇科琪(天津)水质添加剂有限公司 | A kind of boiler feedwater high efficiency deoxidiser and the preparation method and application thereof |
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Application publication date: 20210924 |