CN105174504A - Environment-friendly deoxidant for boiler - Google Patents
Environment-friendly deoxidant for boiler Download PDFInfo
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- CN105174504A CN105174504A CN201510634496.2A CN201510634496A CN105174504A CN 105174504 A CN105174504 A CN 105174504A CN 201510634496 A CN201510634496 A CN 201510634496A CN 105174504 A CN105174504 A CN 105174504A
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- environment
- friendly
- deoxidant
- oxygen scavenger
- boiler
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- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention provides an environment-friendly deoxidant for a boiler. The environment-friendly deoxidant contains oxime compounds, hydroxylamine compounds and deionized water, wherein the mass percentage of the deionized water to the oxime compounds to the hydroxylamine compounds is (30-85): (10-30): (5-10). The deoxidant can reduce the iron content of supplied water, overheating and corrosion damage of a metal tube due to iron oxide deposits in the boiler are prevented, and meanwhile, the environment-friendly deoxidant has a cleaning function on copper corrosion products deposited on a tube, an economizer and the like; besides, the deoxidant can be decomposed to formic acid, acetic acid, nitrogen oxide and the like at the high temperature, has the advantages of non-toxicity, non-pollution discharge and the like and is environment-friendly.
Description
Technical field
The invention belongs to boiler special agent, particularly a kind of environment-friendly type oxygen scavenger for boiler.
Background technology
Dissolved oxygen in feedwater is the one of the main reasons of heat power equipment corrosion.Heat power equipment is in installation, operation and all oxygen corrosion may occur during stopping transport.This corrosion can affect the work-ing life of equipment, and corrosion product can be brought in therrmodynamic system, will salification in system, fouling, cause thermo-efficiency to decline, water and steam quality worsen, may occur as accidents such as boosters time serious.Therefore boiler supply water deaerating is the problem that people extremely pay close attention to always.
In order to prevent oxygen corrosion, start thermal deoxygenizing apparatus has been installed in water feeding system from the thirties, and be aided with chemical deoxidization to remove trace dissolved oxygen.The nineteen thirty-five U.S. K.A.Kobe and W.L.Gooding has delivered first and has used Na
2sO
3removing dissolved oxygen in boiler water, points out Na
2sO
3the good oxygen scavenger of one of low pressure boiler, to the widespread use abroad of this method forties.Hydrazine is brought into use the sixties to be oxygen scavenger, and developed catalysis hydrazine oxygen scavenger, effect is fine, effectively can remove the dissolved oxygen in water, and can by the Reduction of Oxide Cheng Tie of iron, copper and copper, to reduce the generation of therrmodynamic system iron dirt and copper dirt, its high-temperature decomposition product is full volatile matter simultaneously, does not increase system saltiness.But these two kinds of oxygen scavengers all also exist very large shortcomings and limitations separately: Na
2sO
3generally be confined to middle low-pressure boiler Water purification, consumption is large, and continuous use can cause stove water saltiness to increase, and degradation production is corrosives, and does not have passivation to metallic surface; Hydrazine is volatile, inflammable, hypertoxic, and is suspect carcinogen, there is certain hazardness during onsite application, and hydrazine has deoxygenation speed slow when water temperature is low, the problem such as can not to decompose in medium pressure boiler superheated vapour completely.Therefore, in the urgent need to finding low toxicity, efficiently new type deoxidizer.
The patent No. is that CN201110000457.9 name is called in organic deoxidant for boiler feed water and refer to a kind of organic deoxidant for boiler feed water, and deoxygenation speed is fast, adds the pH adjusting agents such as ammoniacal liquor without the need to auxiliary again; There is passivation effect, passivation protection film can be formed at pipeline and equipment surface, prevent corrosion.But what this patent adopted is hydrazides and neutralizing amine.After reacting with oxygen, remaining hydrazides can be able to decompose in therrmodynamic system, thus makes the carbonic acid gas increasing a few μ g/L in system.Meanwhile, most of organic amine can corrode copper.
Environment-friendly boiler oxygen scavenger provided by the invention, can reduce the iron-holder of feedwater, preventing boiler from causing the overheated and corrosion damage of metal tube because forming precipitate of iron oxide, meanwhile, having cleanup action to the corrosion product of the copper being deposited on the place such as pipeline, economizer.In addition, this oxygen scavenger can pyrolytic decomposition be formic acid, acetic acid and nitrogen oxide etc., have nontoxic, discharge the advantages such as pollution-free, be a kind of oxygen scavenger of environment-friendly type.
Summary of the invention
The object of the present invention is to provide a kind of environment-friendly boiler oxygen scavenger; The iron-holder of feedwater can be reduced; Prevent boiler from causing the overheated and corrosion damage of metal tube because forming precipitate of iron oxide.Meanwhile, cleanup action is had to the corrosion product of the copper being deposited on the place such as pipeline, economizer.In addition, this oxygen scavenger can pyrolytic decomposition be formic acid, acetic acid and nitrogen oxide etc., have nontoxic, discharge the advantages such as pollution-free, be a kind of oxygen scavenger of environment-friendly type.
The technical solution adopted in the present invention is as follows:
A kind of environment-friendly boiler oxygen scavenger, containing oxime compounds, hydroxylamine compound and deionized water.The weight percent of each component is:
Deionized water 30 ~ 85%
Oxime compounds 10 ~ 30%
Hydroxylamine compound 5 ~ 10%.
Described oxime compounds is one or more in diethyl ketoxime, ethylidenehydroxylamine, methyl ethyl ketone oxime.
Described hydroxylamine compound is one or more in diethyl hydroxylamine, N-isopropylhydroxyla.
The preparation method of described a kind of environment-friendly boiler oxygen scavenger: add the deionized water of 30 ~ 85% in a kettle.; Then in reactor, add the oxime compounds of 10 ~ 30%, stir 20 ~ 30 minutes; In the solution after above-mentioned stirring, add the hydroxylamine compound of 5 ~ 10%, and stir 40 ~ 60 minutes.
Embodiment one
Choose raw material by weight percentage
Deionized water 85%
Diethyl ketoxime 10%
N-isopropylhydroxyla 5%
The deionized water of 85% is added in reactor; Then in reactor, add the diethyl ketoxime of 10%, stir 20 ~ 30 minutes; In the solution after above-mentioned stirring, add the N-isopropylhydroxyla of 5%, and stir 40 ~ 60 minutes.
Embodiment two
Choose raw material by weight percentage
Deionized water 60%
Ethylidenehydroxylamine 30%
Diethyl hydroxylamine 10%
The deionized water of 60% is added in reactor; Then in reactor, add the ethylidenehydroxylamine of 30%, stir 20 ~ 30 minutes; In the solution after above-mentioned stirring, add the diethyl hydroxylamine of 10%, and stir 40 ~ 60 minutes.
Test an oxygen scavenger performance test
Oxygen scavenger experiment of the present invention adopts tap water.5000mL Erlenmeyer flask 2min is blown with carbon dioxide steel cylinder.The tap water adding 5000mL, in Erlenmeyer flask, puts it in water-bath and is heated to 70 ~ 80 DEG C.After half hour, in Erlenmeyer flask, add oxygen scavenger, after reaction 2min, the water in Erlenmeyer flask is passed in dissolved oxygen analytic instrument, carries out the mensuration of dissolved oxygen.
From experimental data, the deoxidize rate of embodiment 1 and embodiment 2 oxygen scavenger is respectively 95.62% and 99.17%.To in oxygen scavenger performance, the deoxygenation performance of oxygen scavenger of the present invention is more excellent.
Test two residual rate experiments
Allow oxygen scavenger of the present invention at high temperature decompose, judge its residual rate by the deoxygenation dosage of remnants.The result measured is the residual rate of oxygen scavenger of the present invention is 0.009%, does not substantially remain.Therefore, oxygen scavenger of the present invention has the advantage of environmental protection.
Claims (5)
1. an environment-friendly boiler oxygen scavenger, containing oxime compounds, hydroxylamine compound and deionized water.
2. environment-friendly boiler oxygen scavenger according to claim 1, the weight percent of each component is:
Deionized water 30 ~ 85%
Oxime compounds 10 ~ 30%
Hydroxylamine compound 5 ~ 10%.
3. environment-friendly boiler oxygen scavenger according to claim 1, is characterized in that: described oxime compounds is one or more in diethyl ketoxime, ethylidenehydroxylamine, methyl ethyl ketone oxime.
4. environment-friendly boiler oxygen scavenger according to claim 1, is characterized in that: described hydroxylamine compound is one or more in diethyl hydroxylamine, N-isopropylhydroxyla.
5. according to environment-friendly boiler oxygen scavenger described in claim 1, it is characterized in that: the preparation method of described a kind of environment-friendly boiler oxygen scavenger: add the deionized water of 30 ~ 85% in a kettle.; Then in reactor, add the oxime compounds of 10 ~ 30%, stir 20 ~ 30 minutes; In the solution after above-mentioned stirring, add the hydroxylamine compound of 5 ~ 10%, and stir 40 ~ 60 minutes.
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CN201510634496.2A CN105174504A (en) | 2015-09-30 | 2015-09-30 | Environment-friendly deoxidant for boiler |
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CN201510634496.2A CN105174504A (en) | 2015-09-30 | 2015-09-30 | Environment-friendly deoxidant for boiler |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113428926A (en) * | 2021-07-07 | 2021-09-24 | 青岛海德罗奥爱克斯工业水处理有限公司 | Deoxidant for boiler water treatment and preparation method thereof |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3162099B2 (en) * | 1991-04-30 | 2001-04-25 | 株式会社片山化学工業研究所 | Water treatment method for soft water boiler |
CN101568597A (en) * | 2006-12-25 | 2009-10-28 | 中国涂料株式会社 | Curable composition, antifouling coating composition, antifouling coating film, base with antifouling coating film, and method for preventing fouling on base |
CN102344215A (en) * | 2010-12-10 | 2012-02-08 | 新疆德蓝股份有限公司 | Novel water treatment method for boiler feedwater |
CN104108761A (en) * | 2014-07-31 | 2014-10-22 | 威海翔宇环保科技有限公司 | Boiler oxygen scavenger |
-
2015
- 2015-09-30 CN CN201510634496.2A patent/CN105174504A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3162099B2 (en) * | 1991-04-30 | 2001-04-25 | 株式会社片山化学工業研究所 | Water treatment method for soft water boiler |
CN101568597A (en) * | 2006-12-25 | 2009-10-28 | 中国涂料株式会社 | Curable composition, antifouling coating composition, antifouling coating film, base with antifouling coating film, and method for preventing fouling on base |
CN102344215A (en) * | 2010-12-10 | 2012-02-08 | 新疆德蓝股份有限公司 | Novel water treatment method for boiler feedwater |
CN104108761A (en) * | 2014-07-31 | 2014-10-22 | 威海翔宇环保科技有限公司 | Boiler oxygen scavenger |
Non-Patent Citations (2)
Title |
---|
刘斐文,王萍: "《现代水处理方法与材料》", 30 September 2003 * |
王正平, 杨淑华: "新型除氧剂", 《应用科技》 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113428926A (en) * | 2021-07-07 | 2021-09-24 | 青岛海德罗奥爱克斯工业水处理有限公司 | Deoxidant for boiler water treatment and preparation method thereof |
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