CN1068313A - Water treating agent for boilers - Google Patents
Water treating agent for boilers Download PDFInfo
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- CN1068313A CN1068313A CN 91104700 CN91104700A CN1068313A CN 1068313 A CN1068313 A CN 1068313A CN 91104700 CN91104700 CN 91104700 CN 91104700 A CN91104700 A CN 91104700A CN 1068313 A CN1068313 A CN 1068313A
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Abstract
The present invention is a kind of water-treating agent of boiler, it is a kind of composite type water treating agent, by organic phosphonate, polycarboxylate, organic sludge conditioning agent, organic oxygen scavenger is a basic recipe, also comprises tertiary sodium phosphate for the steam boiler that uses former water to do boiler feedwater, uses for the hot water boiler oxygen scavenger to comprise cobalt salt and the compound oxygen scavenger of benzoic catalyzed sulfite.The present invention is applicable to and uses former water that soft water is made the various types of steam and the hot water boiler of supplementary feed.
Description
The invention belongs to the water treatment agent of handling oiler feed.
No matter be steam boiler, or hot water boiler, the corrosion of stove internal heating surface and fouling all can be shortened its work-ing life, increase energy consumption, even can cause boiler explosion accident.For corrosion and the fouling that prevents boiler, must handle the feedwater of boiler, reach the inhibition and the scale inhibition purpose of boiler.
The present invention is said to be handled oiler feed, is meant the employing pharmaceutical treatment, promptly adds suitably an amount of medicament in oiler feed, reaches the purpose that prevents boiler corrosion and fouling.For the processing of oiler feed, according to report as can be known, formed the compound prescription of organic phosphonate and polycarboxylate.For example, report in the European patent EP 265723, soft water Boilers corrosion-mitigation scale-inhibition prescription in the time of 150～250 ℃ is: 1. at least a polyphosphoric acid, organic phosphoric acid and orthophosphoric acid salt 10～200mg/l; 2. at least a aliphatic carboxylic acid and amino acid 40～500mg/l; 3. at least a metallic compound 2.5～50mg/l that in water, can discharge Sn, Zn, Mn or Ni.Such medicament, though can play certain inhibition and scale effect, owing to do not have oxygen scavenger in the medicament, the dissolved oxygen of water is still very high in the stove, the etching problem of dissolved oxygen does not solve.
At the problem that present boiler water processing exists, the present invention proposes a kind of water treating agent for boilers that integrates scale inhibition, deoxygenation, inhibition.
Water treating agent for boilers provided by the present invention is a kind of compound medicament, has the function of inhibition, scale inhibition, deoxygenation simultaneously.In general, for general steam boiler, medicament provided by the invention comprises: organic phosphonate 10～40%, polycarboxylate 8～30%, organic sludge conditioning agent 4～30%, organic oxygen scavenger 5～20%.Do the situation of oiler feed for the former water of direct use, also should comprise tertiary sodium phosphate in the medicament of the present invention.For hot water boiler, except that using above-mentioned medicament, oxygen scavenger should use the compound oxygen scavenger of catalyzed sulfite.
Said organic phosphonate can be 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP) and an alkali metal salt or amine salt in the medicament of the present invention, third diphosphonate, aryl chloride methene diphosphonate, the phosphonate group succsinic acid, Amino Trimethylene Phosphonic Acid (ATMP), ethylene diamine tetra methylene phosphonic acid (EDTMP), triethylenediamine tetramethyl fork phosphonic acids (TEDTMP), triethylenetetramine pregnancy fork phosphonic acids (TETDHMP), Diethylenetriaminee (DETA) five methylenephosphonic acids phosphonate and derivatives thereof such as (DETPMP), can be wherein a kind of, also can be two or more mixture wherein.The Heat stability is good of organic phosphonate, not facile hydrolysis.
Said polycarboxylate can be low-molecular-weight polymaleic anhydride or its acid in the medicament of the present invention, poly-fumaric acid, polymethyl acrylic acid, polymkeric substance such as polyacrylamide, or its binary polymer or multiple copolymer.The composite use of polycarboxylate and organic phosphonate has good synergistic, but also has molten limit effect.
Said organic sludge conditioning agent in the medicament of the present invention, being the polymkeric substance that molecular weight is different from the lower molecular weight polycarboxylate, can be polyacrylamide, polymaleic anhydride or its polymkeric substance, polymethyl acrylic acid or its salt, polyacrylic acid or its salt and multiple copolymer thereof etc. are polymkeric substance similarly.Organic sludge conditioning agent has the good adsorption dispersive ability, can make Ca
2+, Mg
2+Plasma or other become dirty material to form the mud of high fluidity, and energy unrestricted flow does not stick on the furnace wall mud, can discharge with draining of boiler.
Make organic oxygen scavenger in the steam boiler of the present invention, this is a kind of oximes material, and its general formula is RC=N-OH, as formoxime, ethylidenehydroxylamine, propionaldoxime, acetoxime, dimethylglyoxime etc., such organic oxygen scavenger is soluble in water, nontoxicly can not increase molten solid amount, there is not the sort of toxicity of hydrazine class oxygen scavenger big, carcinogenic, shortcomings such as easy decomposition, it can be in 100～340 ℃ of scopes, 3～140Kg/cm
2Pressure under, make dissolved oxygen in the water maintain a minimum level even be zero.Thereby control the corrosion of steam generating system metallic surface effectively.The present invention uses the compound oxygen scavenger of catalyzed sulfite in hot water boiler, and uses with organophosphate, polycarboxylate, organic sludge conditioning agent.The present invention's hot water boiler oxygen scavenger in the past, all be single use sulphite as oxygen scavenger, the shortcoming of Shi Yonging is that consumption is big like this, brings impurity to boiler, and the sulphite poor stability, and is easily oxidized and lost efficacy in air.The present invention is used sulphite and catalyzer, quickens the reaction of sulphite and oxygen, has improved the stability when sulphite is deposited, and has overcome the shortcoming of single use sulphite.The compound oxygen scavenger of the said catalyzed sulfite of the present invention is a sulphite 90～99%, cobalt salt 0.001～5%, phenylformic acid 0.01～5%.
Water treating agent for boilers provided by the present invention, its inhibitor mechanism are the solubilising methods.It is to form by multiple compound is composite, and multipath scale effect is arranged.By sequestering action, be that the center is to metal ion (Ca with the hydroxyl
2+, Mg
2+) very strong sequestering action is arranged, play a part the lattice distortion simultaneously again.By distortion and dislocation to lattice, disturb the lattice growth of dirt layer or make dirty layer crystal lattice fouling generation distortion, the dirt layer can not continue to generate, by to Ca
2+, Mg
2+The effect of isoionic deactivation voltinism is reduced to dirty lattice number.Can also on the surface of incrustation scale resultant, form film, or adsorbed by the boiler wall, thereby stop solid particulate to increase, change the electric charge of particle, make boiler surface constitute neutral line, obstruction attracts each other with particle, with the mud of the mobile property of throw out formation high density, discharges from draining of boiler easily.
Water treating agent for boilers provided by the present invention, its corrosion inhibitive function mainly are to play a role by oxygen scavenger.Use organic oxygen scavenger in the steam boiler, use the catalyzed sulfite oxygen scavenger in the hot water boiler, can make the oxygen level in the oiler feed approaching zero, thereby solved the etching problem of oxygen in water.
Medicament provided by the present invention is compound medicament, is applicable to various types of former water, soft water hot water boiler and steam boiler.Use medicament of the present invention not need increase equipment, easy and simple to handle, expense is low, and is widely applicable.
Example 1
Boiler feedwater has ion exchange resin treatment, does not have de-aerator plant, and boiler is a steam boiler, and test conditions is as follows:
Boiler model: SHL-10-13-A
Feedwater: soft water does not have de-aerator plant
Blowdown flow rate: 10%(is with respect to confluent)
Working life: about 5 years
This boiler has the thin dirt of one deck using before the water treating agent for boilers in the boiler, about 1mm is thick, and the about 1mm of dirty lower floor corrosion, boiler feed water pipe every half a year just need replacing once, this is due to the corrosion damage.Before the test, change new pipe, test period is half a year, uses following prescription during test:
1-Hydroxy Ethylidene-1,1-Diphosphonic Acid: 40%
Vinylformic acid and maleic acid: 25%
Methacrylate polymer: 20%
Propionaldoxime: 5%
Water: 10%
Adding dose is 20ppm, and blow-on inspection after six months does not have new dirt to adhere on original old dirt layer, and some old dirty pull-up falls, and the metallic surface is smooth, seemingly has protective membrane to generate.Originally show no sign of budging in the place that was corroded.The corrosion of the bright and clean nothing dirt of upper hose.The dissolved oxygen content of duration of test stove water is measured as follows:
After the preceding dosing of dosing
May 26 6 April 27 of March on January 31st, 89
Stove water oxygen level〉100ppb＜5ppb＜5ppb 0～5ppb＜5ppb
Example 2
Make the steam boiler of boiler feedwater with former water, test conditions is as follows:
Boiler model: KZW-53-AIV
Quantity of steam: 2 tons/hour
Feedwater: former water
Blowdown flow rate: 10%(is with respect to confluent)
Working life: new stove
This stove uses the water-treating agent of boiler of following prescription:
Diethylene Trimethylamine 99 five methylenephosphonic acids: 40%
Polymaleic anhydride: 25%
Acrylate copolymer: 10%
Propionaldoxime: 15%
Tertiary sodium phosphate: 5%
Water: 5%
This compound drug usage quantity is 25ppm, and be four months duration of service, the blow-on inspection, and all bright and clean nothing dirt does not have corrosion in stove barrel and the pipe.Stove water dissolution determination of oxygen content is as follows during the medication:
After the preceding dosing of dosing
August 27 June 5 on May 12nd, 90
Stove water oxygen level〉100ppb＜5ppb＜5ppb＜5ppb
Example 3
Test is a hot water boiler with boiler, and oxygen scavenger is a catalyzed sulfite, and test conditions is as follows:
Boiler model: QXW-360-7/95/70-AIV
Feedwater: former water
Blowdown flow rate: 10%(is with respect to confluent)
Working life: 2 years (actual is two heating phases)
This boiler is to use soft water to do supplementary feed before dosing, does not have de-aerator plant, do not have dirt in the stove substantially, but oxygen corrosion is very serious, and there is ulcer-like corrosion in a lot of places.Use former water instead during the dosing test and do supplementary feed, use following prescription to handle:
Inhibiter: ethylene diamine tetra methylene phosphonic acid: 20%
Polymaleic anhydride: 40%
Sodium polyacrylate: 30%
Water: 10%
Oxygen scavenger: catalyzed sulfite, wherein S-WAT 99%, cobalt salt 0.8%, phenylformic acid 0.2%.
Inhibiter consumption 25ppm, the oxygen scavenger consumption is four months for the 25ppm test period, i.e. and a heating phase, blow-on inspection then finds no dirt, does not also have to find that new corrosion is arranged, and originally show no sign of budging in the corrosive place.It is as follows that duration of test is measured stove water dissolution oxygen level:
After the preceding dosing of dosing
On October 4th, 89
Stove water oxygen level〉100ppb 0～5ppb
Example 4
This example does not have in that ion-exchange is arranged on the boiler of de-aerator plant and tests.
Boiler model: SHL-20-13
Feedwater: soft water does not have de-aerator plant
Blowdown flow rate: 10%(is with respect to confluent)
Working life: new stove
This stove uses the water-treating agent of boiler of following prescription:
Amino Trimethylene Phosphonic Acid: 10%
Methacrylic acid and maleic acid: 10%
Polyacrylamide: 30%
Diacetylmonoxime: 20%
Water: 30%
Adding dose is 20ppm, and corrosion and scale formation are not found in blow-on inspection after 18 months in the stove.The dissolved oxygen content of duration of test stove water is measured as follows:
August 25 90 year on the 9th April 2 of October on March 28th, 89
Stove water oxygen level＜5ppb 0～5ppb＜5ppb＜5ppb
Example 5
Directly use former water to make the steam boiler of boiler feedwater:
Boiler model: KZW-13
Quantity of steam: 2 tons/hour
Feedwater: former water
Blowdown flow rate: 10(is with respect to confluent)
Working life: about 2 years
This stove uses the water-treating agent of boiler of following prescription:
Third diphosphonate: 10%
Polymethyl acrylic acid: 10%
Sodium polyacrylate: 5%
Diacetylmonoxime: 20%
Tertiary sodium phosphate: 30%
Water: 25%
This stove on inspection, was found fouling 1 millimeter in the stove before with medicament, corrode not serious.The medicament working concentration is 25ppm, and be 1 year duration of service, and the blow-on inspection finds that old dirt layer comes off substantially in the stove, and not new dirt generates, and the place of aggravation is not corroded in the place that is corroded before the dosing.Duration of test stove water dissolution oxygen is measured as follows:
On March 14, in 89 on April 5,90
Stove water oxygen level＜5ppb＜5ppb
Claims (6)
1, a kind of water treating agent for boilers of oiler feed, comprising organic phosphonate 10～40%, polycarboxylate 8～20%, organic sludge conditioning agent 4～30%, organic oxygen scavenger 5～20%, for using former water to make the steam boiler of boiler feedwater, also should comprise tertiary sodium phosphate 5～30%, should use the compound oxygen scavenger of catalyzed sulfite for the hot water boiler oxygen scavenger.
2, a kind of as the said water treating agent for boilers of claim 1, said organic phosphonate is 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP) and an alkali metal salt or amine salt, third diphosphonate, aryl chloride methene diphosphonate, the phosphonate group succsinic acid, Amino Trimethylene Phosphonic Acid (ATMP), ethylene diamine tetra methylene phosphonic acid (EDTMP), triethylenediamine tetramethyl fork phosphonic acids (TEDTMP), triethylenetetramine pregnancy fork phosphonic acids (TETDHMP), Diethylenetriaminee (DETA) five methylenephosphonic acids (DETPMP) wait phosphonate and derivative thereof.
3, a kind of as the said water treating agent for boilers of claim 1, said polycarboxylate is low-molecular-weight polymaleic anhydride or its acid, poly-fumaric acid, polymethyl acrylic acid, polymkeric substance such as polyacrylamide, or its binary polymer.
4, a kind of as the said water treating agent for boilers of claim 1, said organic sludge conditioning agent is the base polymer that molecular weight is different from the lower molecular weight polycarboxylate, can be polyacrylamide, polymaleic anhydride or its acid or its multipolymer, polymethyl acrylic acid or its salt, polyacrylic acid or its salt.
5, a kind of as the said water treating agent for boilers of claim 1, said organic oxygen scavenger is that general formula is the oximes material of RC=N-OH, can be formoxime, ethylidenehydroxylamine, acetoxime, propionaldoxime, Diacetylmonoxime, dimethylglyoxime.
6, a kind of as the said water treating agent for boilers of claim 1, the compound oxygen scavenger of said catalyzed sulfite is a sulphite 90～99%, cobalt salt 0.001～5%, phenylformic acid 0.01～5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91104700 CN1068313A (en) | 1991-07-08 | 1991-07-08 | Water treating agent for boilers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91104700 CN1068313A (en) | 1991-07-08 | 1991-07-08 | Water treating agent for boilers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1068313A true CN1068313A (en) | 1993-01-27 |
Family
ID=4906764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91104700 Pending CN1068313A (en) | 1991-07-08 | 1991-07-08 | Water treating agent for boilers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1068313A (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101913713A (en) * | 2010-03-16 | 2010-12-15 | 上海立昌环境工程有限公司 | Sulfate scale cleaning agent |
| CN1986456B (en) * | 2005-12-23 | 2010-12-22 | 余新军 | Slow released scale inhibitor and its production process and usage |
| CN102765820A (en) * | 2012-07-19 | 2012-11-07 | 广州市特种承压设备检测研究院 | HEDP (hydroxyethylidenediphosphonic acid)-based organic corrosion and scale inhibitor for industrial boiler |
| CN103183417A (en) * | 2011-12-30 | 2013-07-03 | 王炜 | Medicament for treating composite water in hot water boiler as well as preparation method and use method thereof |
| CN103332794A (en) * | 2013-06-08 | 2013-10-02 | 中国石油天然气股份有限公司 | Composite water treatment agent for thickened oil thermal recovery boiler and preparation method thereof |
| CN103523843A (en) * | 2013-10-29 | 2014-01-22 | 天津科维津宏环保科技有限公司 | Low-temperature boiler deoxidant and preparation method thereof |
| CN104058510A (en) * | 2014-06-27 | 2014-09-24 | 关均征 | Industrial equipment anti-scaling agent |
| CN105819579A (en) * | 2016-05-31 | 2016-08-03 | 无锡锡能锅炉有限公司 | Treatment agent for biomass boiler water |
| CN105980317A (en) * | 2014-02-13 | 2016-09-28 | 栗田工业株式会社 | Scale removal method and scale removal agent for steam generating facilities |
| CN108640298A (en) * | 2018-05-29 | 2018-10-12 | 苏州佑君环境科技有限公司 | A kind of oil field waste antisludging agent and preparation method thereof |
| CN109607835A (en) * | 2019-02-14 | 2019-04-12 | 上海久安水质稳定剂厂 | Waste heat boiler of converter efficiently shells dirty scale remover online |
| CN109912050A (en) * | 2019-03-20 | 2019-06-21 | 河钢股份有限公司承德分公司 | A kind of method for treating water inhibiting boiler corrosion |
| CN110065984A (en) * | 2019-04-30 | 2019-07-30 | 河北厚善德水处理剂科技有限公司 | A kind of steam boiler feedwater deaeration agent and preparation method thereof and deoxidation method |
-
1991
- 1991-07-08 CN CN 91104700 patent/CN1068313A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1986456B (en) * | 2005-12-23 | 2010-12-22 | 余新军 | Slow released scale inhibitor and its production process and usage |
| CN101913713A (en) * | 2010-03-16 | 2010-12-15 | 上海立昌环境工程有限公司 | Sulfate scale cleaning agent |
| CN101913713B (en) * | 2010-03-16 | 2012-02-29 | 上海立昌环境工程有限公司 | Sulfate scale cleaning agent |
| CN103183417A (en) * | 2011-12-30 | 2013-07-03 | 王炜 | Medicament for treating composite water in hot water boiler as well as preparation method and use method thereof |
| CN102765820A (en) * | 2012-07-19 | 2012-11-07 | 广州市特种承压设备检测研究院 | HEDP (hydroxyethylidenediphosphonic acid)-based organic corrosion and scale inhibitor for industrial boiler |
| CN103332794A (en) * | 2013-06-08 | 2013-10-02 | 中国石油天然气股份有限公司 | Composite water treatment agent for thickened oil thermal recovery boiler and preparation method thereof |
| CN103523843B (en) * | 2013-10-29 | 2016-03-02 | 天津科维津宏环保科技有限公司 | A kind of Low-temperature boiler deoxidant and preparation method thereof |
| CN103523843A (en) * | 2013-10-29 | 2014-01-22 | 天津科维津宏环保科技有限公司 | Low-temperature boiler deoxidant and preparation method thereof |
| CN105980317A (en) * | 2014-02-13 | 2016-09-28 | 栗田工业株式会社 | Scale removal method and scale removal agent for steam generating facilities |
| US10384966B2 (en) | 2014-02-13 | 2019-08-20 | Kurita Water Industries Ltd. | Method for removing scale and scale remover in steam generating facility |
| US10703659B2 (en) | 2014-02-13 | 2020-07-07 | Kurita Water Industries Ltd. | Scale remover in steam generating facility |
| CN104058510A (en) * | 2014-06-27 | 2014-09-24 | 关均征 | Industrial equipment anti-scaling agent |
| CN105819579A (en) * | 2016-05-31 | 2016-08-03 | 无锡锡能锅炉有限公司 | Treatment agent for biomass boiler water |
| CN108640298A (en) * | 2018-05-29 | 2018-10-12 | 苏州佑君环境科技有限公司 | A kind of oil field waste antisludging agent and preparation method thereof |
| CN109607835A (en) * | 2019-02-14 | 2019-04-12 | 上海久安水质稳定剂厂 | Waste heat boiler of converter efficiently shells dirty scale remover online |
| CN109912050A (en) * | 2019-03-20 | 2019-06-21 | 河钢股份有限公司承德分公司 | A kind of method for treating water inhibiting boiler corrosion |
| CN110065984A (en) * | 2019-04-30 | 2019-07-30 | 河北厚善德水处理剂科技有限公司 | A kind of steam boiler feedwater deaeration agent and preparation method thereof and deoxidation method |
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
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