CN103523843B - A kind of Low-temperature boiler deoxidant and preparation method thereof - Google Patents
A kind of Low-temperature boiler deoxidant and preparation method thereof Download PDFInfo
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- CN103523843B CN103523843B CN201310522322.8A CN201310522322A CN103523843B CN 103523843 B CN103523843 B CN 103523843B CN 201310522322 A CN201310522322 A CN 201310522322A CN 103523843 B CN103523843 B CN 103523843B
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Abstract
The invention discloses a kind of Low-temperature boiler deoxidant and preparation method thereof, product is formed through specific mixing step is composite by deoxygenation host, stablizer, catalyzer, solubilizing agent.Product preparation process of the present invention is simple, and product is nontoxic, and deoxygenation speed is fast, efficiency is high, excellent storage stability, adds more because of catalyzer the use temperature reducing product, has important actual application value.Product application is in large-sized boiler system, deoxygenation can be carried out under lesser temps (50 ~ 70 DEG C) condition, can reduce the operating temperature of deoxygenator, save deoxygenator consumable steam, the residue of product after oxygen removal process has no effect to feedwater indices.
Description
Technical field
The present invention relates to boiler water processing field, be specifically related to a kind of low temperature rapidly and efficiently boiler deoxidant and preparation method thereof.
Background technology
Boiler is industrial important motivity equipment.In boiler running process, the dissolved oxygen in water is the one of the main reasons causing body of heater to corrode.First dissolve oxygen corrosion causes equipment and materials and destroys, and increases the maintenance cost of equipment, shortens the work-ing life of boiler.Meanwhile, be attached to corrosion product on boiler tube wall and heating surface and can make heat transfer deterioration, cause boiler heat-transfer loss to increase, cause tube wall temperature rising, overheated, bulge, greatly add the probability that boiler has an accident.In order to prevent oxygen corrosion, need to carry out deoxygenation process to boiler feed water.It is auxiliary processing mode that current boiler feed water deoxygenation process generally adopts thermal de-aeration to be main, chemical deoxidization.
The main products that current chemical deoxidization process uses has S-WAT, hydrazine, oxime compounds, hydroxylamine compound, saccharosonic acid and sodium salt thereof, carbohydrazide and amino-heterocyclic compounds etc.These products often also exist the various problems such as toxicity is high, oxygen removal efficiency is low, deoxygenation remaining influence boiler water quality.
Summary of the invention
Technical problem to be solved by this invention overcomes the deficiencies in the prior art, provide a kind of in low temperature environment boiler deoxidant rapidly and efficiently and preparation method thereof.
Particular content of the present invention is:
A kind of Low-temperature boiler deoxidant, count its formation by weight and formed by with lower part:
Deoxygenation host described in the present invention is oxime compound, specifically comprises the mixture of one or more in ethylidenehydroxylamine, DMKO, methylethyl ketoxime, cyclohexanone-oxime, the mixture of preferred ethylidenehydroxylamine and DMKO.
Above-mentioned catalyzer is cobalt metal, nickel, the inorganic acid salt of cupric ion and coordination compound thereof, be specially the one in rose vitriol, rose vitriol-EDTA title complex, rose vitriol-NTA title complex, nickelous chloride, nickelous chloride-EDTA title complex, nickelous chloride-NTA title complex, copper sulfate, copper sulfate-EDTA title complex, copper sulfate-NTA title complex, preferably sulfuric acid cobalt-EDTA title complex or rose vitriol-NTA title complex.
Above-mentioned stablizer is the one in polyacrylic acid, polymethyl acrylic acid, hydrolytic polymaleic anhydride, poly-epoxy succinic acid, preferred poly-epoxy succinic acid.
Above-mentioned solubilizing agent specifically comprises the one in class 80 of department, polysorbate60, Tween-80, maleic acid di-sec-octyl, disecoctylmaleate sodium sulfonate, preferred disecoctylmaleate sodium sulfonate.
Wherein, find deoxygenation host, catalyzer by test, formula rate (with weight parts) between stablizer and solubilizing agent should meet following condition to reach the preferably impact of performance:
2) catalyzer/deoxygenation host >=0.005, deoxygenation speed;
3) solubilizing agent/deoxygenation host >=0.0025, the physical stability of the outer product of this scope is deteriorated;
4) stablizer/deoxygenation host >=0.0025, the chemical stability of the outer product of this scope is deteriorated.
Further, present invention also offers a kind of preparation method of above-mentioned boiler deoxidant, concrete steps are carried out as follows: add in 1000L reactor by the R/O water of formula ratio, control water temperature 30 ~ 40 DEG C, first the solubilizing agent adding formula ratio makes it dissolve completely, add the stablizer of formula ratio, deoxygenation host, catalyzer afterwards successively, stir 1 ~ 2h and make it to dissolve completely, obtain described low temperature rapidly and efficiently boiler deoxidant.
Deoxygenation host is the main ingredient of boiler deoxidant, reduces content of oxygen dissolved in water by the dissolved oxygen generation redox reaction in itself and water; The effect of catalyzer is the reaction activity reducing deoxygenation host and oxygen in water, to improve deoxygenation speed of response, the deoxygenation host oxime compound selected in the present invention coordinates corresponding catalyzer, apart from good deaerating effect, deoxygenation speed soon outside, also there is good metal passivation effect, when acting on boiler internal, can metallic corrosion be prevented; The effect of stablizer suppresses the various untoward reactions of deoxygenation host in storage process, maintain the stable content of deoxygenation host, the present invention selects polyacrylic acid or polymethyl acrylic acid, hydrolytic polymaleic anhydride, poly-epoxy succinic acid in the inorganic acid salt and coordination compound thereof of oxime compound and cobalt metal, nickel, cupric ion, especially select poly-epoxy succinic acid as stablizer, find that the oxygen scavenger product storage-stable performance of producing has a distinct increment by lot of experiments contrast.
Product preparation process of the present invention is simple, and product is nontoxic, and deoxygenation speed is fast, efficiency is high, excellent storage stability, adds more because of catalyzer the use temperature reducing product, has important actual application value.Product application is in large-sized boiler system, deoxygenation can be carried out under lesser temps (50 ~ 70 DEG C) condition, can reduce the operating temperature of deoxygenator, save deoxygenator consumable steam, the residue of product after oxygen removal process has no effect to feedwater indices.
Embodiment
For making object of the present invention, technical scheme and advantage distincter, the present invention is further elaborated.
Embodiment 1
The R/O water of 690kg is added in 1000L reactor, control water temperature 30 ~ 40 DEG C, first adding class of 7kg department 80 makes it dissolve completely, add solid polypropylene acid 1kg, DMKO 150kg, methylethyl ketoxime 150kg, rose vitriol-EDTA title complex 2kg afterwards successively, stir 1 ~ 2h to make it to dissolve completely, obtain product.
Embodiment 2
The R/O water of 590kg is added in 1000L reactor, control water temperature 30 ~ 40 DEG C, first adding 5kg disecoctylmaleate sodium sulfonate makes it dissolve completely, add solid polyepoxy succsinic acid 2kg, ethylidenehydroxylamine 250kg, DMKO 150kg, rose vitriol-NTA title complex 3kg afterwards successively, stir 1 ~ 2h to make it to dissolve completely, obtain product.
Embodiment 3
The R/O water of 769kg is added in 1000L reactor, control water temperature 30 ~ 40 DEG C, first adding 10kg disecoctylmaleate sodium sulfonate makes it dissolve completely, add hydrolyzed polymaleic anhydride 5kg, DMKO 160kg, cyclohexanone-oxime 50kg, nickelous chloride 6kg afterwards successively, stir 1 ~ 2h to make it to dissolve completely, obtain product.
The present invention and conventional commercial boiler deoxidant contrast:
Table one
Note: use temperature less than 50 DEG C is normal temperature district, 50 ~ 80 DEG C is cold zone, and 80 ~ 120 DEG C is high-temperature zone, and more than 120 DEG C is superelevation warm area.
Effect comparison:
The result of use that each component of deoxygenation host contrasting product of the present invention and its use from following project is used alone:
Deoxygenation temperature: the minimum temperature starting to react with product and oxygen in water is judgement criteria.
Oxygen removal efficiency: with (100 DEG C) under specified temperature, after product is added to the water (dosage is theoretical dosage excessive 20%), when oxygen in water reaches minimum concentration, the actual clearance of dissolved oxygen is judgement criteria.
Deoxygenation speed: with (100 DEG C) under specified temperature, after product is added to the water (dosage is theoretical dosage excessive 20%), the oxygen in water time reached needed for minimum concentration is judgement criteria.
Package stability: normally pack nature with (six months) product in the specified time in outdoor and place the reserving degree of rear working substance content for judgement criteria.
Table two
| Product category | Deoxygenation temperature DEG C | Deoxygenation speed s | Oxygen removal efficiency % | Product stability % |
| Ethylidenehydroxylamine | 80 | 30 | 90 | 85 |
| DMKO | 95 | 202 | 80 | 95 |
| Methylethyl ketoxime | 110 | —— | —— | 98 |
| Cyclohexanone-oxime | 150 | —— | —— | 99 |
| Embodiment 1 | 60 | 20 | 99 | 99 |
| Embodiment 2 | 55 | 18 | 99 | 99 |
| Embodiment 3 | 65 | 19 | 99 | 99 |
As can be seen from the above data, product of the present invention, can onset at lower operating temperatures compared with other products, and deoxygenation speed significantly improves, and oxygen removal efficiency is stabilized in more than 99%, and product did not substantially have performance degradation situation within six months storage periods.Product of the present invention take oxime compound as main component, and its degradation production is oxynitride and the formic acid of carbonic acid gas, nitrogen and minute quantity, does not produce any harmful effect to steam quality and various vapour technique.
Above preferred embodiment of the present invention has been described in detail, but described content being only preferred embodiment of the present invention, can not being considered to for limiting practical range of the present invention.All equalizations done according to the present patent application scope change and improve, and all should still belong within patent covering scope of the present invention.
Claims (7)
1. a Low-temperature boiler deoxidant, is characterized in that: count by weight and be made up of following component,
Wherein: catalyzer/deoxygenation host >=0.005;
Deoxygenation host is the mixture of one or more in ethylidenehydroxylamine, DMKO, methylethyl ketoxime, cyclohexanone-oxime;
Catalyzer is the one in rose vitriol, rose vitriol-EDTA title complex, rose vitriol-NTA title complex, nickelous chloride, nickelous chloride-EDTA title complex, nickelous chloride-NTA title complex, copper sulfate, copper sulfate-EDTA title complex, copper sulfate-NTA title complex;
Stablizer is the one in polyacrylic acid, polymethyl acrylic acid, hydrolytic polymaleic anhydride, poly-epoxy succinic acid.
2. Low-temperature boiler deoxidant as claimed in claim 1, is characterized in that: solubilizing agent is the one in class 80 of department, polysorbate60, Tween-80, maleic acid di-sec-octyl, disecoctylmaleate sodium sulfonate.
3. Low-temperature boiler deoxidant as claimed in claim 2, is characterized in that: deoxygenation host is the mixture of ethylidenehydroxylamine and DMKO.
4. Low-temperature boiler deoxidant as claimed in claim 3, is characterized in that: catalyzer is rose vitriol-EDTA title complex or rose vitriol-NTA title complex.
5. Low-temperature boiler deoxidant as claimed in claim 4, is characterized in that: stablizer is poly-epoxy succinic acid.
6. Low-temperature boiler deoxidant as claimed in claim 5, is characterized in that: solubilizing agent is disecoctylmaleate sodium sulfonate.
7. prepare the method for the Low-temperature boiler deoxidant as described in any one of claim 1-6 for one kind, it is characterized in that preparation process is carried out as follows: add in 1000L reactor by the R/O water of formula ratio, control water temperature 30 ~ 40 DEG C, first the solubilizing agent adding formula ratio makes it dissolve completely, add the stablizer of formula ratio, deoxygenation host, catalyzer afterwards successively, stir 1 ~ 2h to make it to dissolve completely, obtain described Low-temperature boiler deoxidant.
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105090681A (en) * | 2014-05-08 | 2015-11-25 | 苏州可利尔水处理有限公司 | Steam pipeline protection agent |
| CN104402080A (en) * | 2014-06-17 | 2015-03-11 | 上海南阳精细化工有限公司 | Boiler feedwater deoxidant for replacing thermal deaerator and preparation and application methods thereof |
| CN104805692A (en) * | 2015-04-08 | 2015-07-29 | 界首市华强防水防腐材料有限公司 | High-performance anticorrosive waterproof environment-friendly novel material |
| CN107324557B (en) * | 2017-08-08 | 2020-09-25 | 杭州航民热电有限公司 | Water treatment method for boiler feed water |
| CN108585094A (en) * | 2018-05-21 | 2018-09-28 | 威海翔宇环保科技股份有限公司 | The high pressure boiler water supply oxygen scavenger and preparation method thereof used suitable for low temperature |
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| CN1068313A (en) * | 1991-07-08 | 1993-01-27 | 化学工业部天津化工研究院 | Water treating agent for boilers |
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| JP2007078291A (en) * | 2005-09-15 | 2007-03-29 | Idemitsu Kosan Co Ltd | Treatment method, treatment device, and its usage for styrene monomer manufacturing device boiler feed water |
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| CN1058384A (en) * | 1990-07-27 | 1992-02-05 | 刘德元 | Boiler water quality deoxidization agent and production method thereof |
| CN1068313A (en) * | 1991-07-08 | 1993-01-27 | 化学工业部天津化工研究院 | Water treating agent for boilers |
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| JP特开2007－78291A 2007.03.29 * |
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