CN102633374A - Novel corrosion and scale inhibitor applicable to natural gas heating furnace - Google Patents
Novel corrosion and scale inhibitor applicable to natural gas heating furnace Download PDFInfo
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- CN102633374A CN102633374A CN2012101094933A CN201210109493A CN102633374A CN 102633374 A CN102633374 A CN 102633374A CN 2012101094933 A CN2012101094933 A CN 2012101094933A CN 201210109493 A CN201210109493 A CN 201210109493A CN 102633374 A CN102633374 A CN 102633374A
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Abstract
The invention relates to a novel corrosion and scale inhibitor, which is widely applicable to a natural gas heating furnace or other relevant boilers. A main agent of the corrosion and scale inhibitor is hydroxyethylidene diphosphonic acid (HEDP), and an auxiliary agent is dodecyl dimethyl benzyl ammonium chloride (1227), benzotriazole (BTA) and sodium citrate. Vitamine C is additionally added as deoxidant to obviously improve the corrosion inhibition effect. Finally, pH is adjusted to 5-6 by sodium hydroxide. The corrosion rates of a blank water sample to 20# steel and A3 steel are respectively reduced to 0.04142 mm/a and 0.04340 mm/a from 0.07455 mm/a and 0.06752 mm/a, and the inhibition rates can be up to 38.66% and 41.79% and be improved compared with 30.29% and 35.15% of the like product in the market. The corrosion and scale inhibitor related to the invention is low in cost, stable in prescription and simple in preparation, and can be applicable to different boilers by adjusting the ratio of each constituent.
Description
Technical field
The present invention relates to be used for the new antiseptic corrosion inhibitor of gas heating furnace and other relevant boiler,
Background technology
At present, gas heating furnace is one of visual plant in the industrial production system.Because water consumption is big, dissolving and the oxygen and carbon dioxide that carries all are state of saturation in the water, easily boiler are caused intensive fouling and corrosion, produce and mix incrustation.The fouling corrosion on process furnace surface can make the heat-transfer surface heat conductivility descend, and causes energy dissipation, and in addition, the corrosion ulcer that corrosion produced on body of heater surface can further be accelerated the corrosion speed of interior metal, shortens the work-ing life of equipment.At present, have to the corrosion of industrial equipmentss such as boiler, process furnace and fouling inhibiter commonly used: inorganic oxygen scavenger, organic oxygen scavenger, Wu Luotuoping (hexamethylenetetramine), if fourth (two adjacent benzene methyl-thioureas), crude pyridine, phytic acid (nucite six phosphoric acid fat) etc.
Though add process furnace could prevented and treated or slow down to the corrosion-mitigation scale-inhibition medicament corrosion and scale problems; But the WATER AS FLOW MEDIUM in the process furnace is continuous evaporation concentration in the production run process; Concentration rate increases; Thereby the system salinity of causing obviously increases, and will influence the drug effect of corrosion-mitigation scale-inhibition medicament, causes fouling and corrosive to produce.Therefore, in the process of process furnace operation, should regularly discharge the WATER AS FLOW MEDIUM of changing in the stove, reduce concentration rate.But should notice that concentration rate can not be too low,, be unfavorable for improving the utilization ratio of water, cause the rising of Financial cost, increase blowdown flow rate simultaneously, bring burden to environment if too low.Along with the growing tension of world's water resources with to the attention of environment protection, the properly distributed water, water saving has become the task of top priority.Therefore, the concentration rate of feedwater should be controlled in the suitable scope (index of stability R.S.I=6).Developing tendency in future is to select for use to be fit to high pH, high firmness; Macromole organic phosphine PAPEMP under the high-alkali condition; Components such as good sulfonic acid multipolymer are as the major ingredient of corrosion inhibiting and descaling agent, or employing corrosion inhibiting and descaling agent+sulfuric acid combination treatment mode, can improve the concentration rate of water effectively.In the actually operating, should confirm to change the cycle of water according to concrete gas gathering station process furnace water water quality, the concentration rate that control is suitable.
According to field condition and early stage the data grasped, at present, the inboard furnace wall fouling of Sweet natural gas water jacket process furnace is serious; The rust staining surface is the inhomogeneous block dirt layer of sorrel; If can not in time protect fouling and furnace wall corrosion, the thermo-efficiency reduction can cause a large amount of heat-energy losses on the one hand, and fouling is further accelerated corrosion speed with the formation meeting of corrosion thing on the other hand; Influence the work-ing life of boiler, and bring certain potential safety hazard for producing.To process furnace carry out regularly, the burn into antiscale of standard detects and control, is the key of in time finding and eliminate accident potential, also is the foundation of in good time making ME and maintenance decision-making.Therefore, develop a kind of chemical formulation, can stop fouling, control corrosion preferably, the corrosion and the scale problems that solve gas field gas gathering station process furnace are the task of top priority.
Summary of the invention
The objective of the invention is: a kind of novel corrosion-retarding Scale inhibitors that is applicable to gas heating furnace is provided, is reduced in fouling in the gas heating furnace.
The technical scheme that the present invention adopts is: be applicable to the novel corrosion-retarding Scale inhibitors of gas heating furnace, each weight percentages of components is:
Dodecyl benzyl dimethyl ammonium chloride (1227), 13～18%;
HEDP (HEDP), 16～25%; (another name: hydroxy ethylene diphosphonic acid)
Trisodium Citrate, 2～4.5%;
Benzotriazole (BTA), 0.1～0.35%;
Sodium hydroxide, 3～6%;
Vitamins C, 0.5～1.5%;
All the other are water, and each component percentages sum is absolutely.
Be applicable to the preparation method of the novel corrosion-retarding Scale inhibitors of gas heating furnace:
A, be mixed with the aqueous solution to solid ingredient, do not have concentration limit.
A, take by weighing technical grade dodecyl benzyl dimethyl ammonium chloride (1227) and add the on-the-spot water of part, be made into dodecyl benzyl dimethyl ammonium chloride (1227) aqueous solution;
B, take by weighing chemical pure Trisodium Citrate and add the on-the-spot water of part, be made into sodium citrate aqueous solution;
C, take by weighing benzotriazole (BTA) and add the on-the-spot water of part, be made into benzotriazole (BTA) aqueous solution;
D, weighing sodium hydroxide add the on-the-spot water of part, the aqueous sodium hydroxide solution that is mixed with.
B. prepare B solution
Above-mentioned each aqueous solution is pressed following order to be mixed:
A, dodecyl benzyl dimethyl ammonium chloride (1227) aqueous solution is added sodium citrate aqueous solution, stir;
B, in above-mentioned solution, add benzotriazole (BTA) aqueous solution again and stir,
C, to add HEDP (HEDP) liquid mixing of technical grade then even;
D, the last aqueous sodium hydroxide solution that slowly adds, regulating pH is 5～5.5, obtains B solution.
C: with oxygen scavenger
Take by weighing vitamins C and add the on-the-spot water of part, be made into the vitamins C aqueous solution; The vitamins C aqueous solution is slowly added in the B solution, stir after adding remaining on-the-spot water, obtain being applicable to the novel corrosion-retarding Scale inhibitors of gas heating furnace, be lurid transparent solution.
Be applicable to the application of novel corrosion-retarding Scale inhibitors in gas heating furnace of gas heating furnace:
In order to make soup in stove water, reach homodisperse, adopt the intermittent type dosing.Promptly earlier in stove, add portion water, add 1/3 left and right sides medicament, add portion water again, add 1/3 left and right sides medicament, divide dosing several times can make medicament homodisperse in stove water like this.
Beneficial effect of the present invention: the present invention is applicable to the novel corrosion-retarding Scale inhibitors of gas heating furnace; Lacing film experiment proof; Blank water sample is reduced to 0.04142 and 0.04340mm/a from 0.07455 with 0.06752mm/a respectively to the erosion rate of 20# steel and A3 steel; Corrosion inhibition rate can reach 38.66% and 41.79%, all increases than 30.29% and 35.15% of market like product.Corrosion inhibiting and descaling agent involved in the present invention is with low cost, and prescription is stable, and preparation is simple, can be suitable for different boilers through regulating each component ratio.
A. corrosion inhibiting and descaling agent raw material provided by the invention is easy to get, and is with low cost, and prescription is stable, and preparation is simple, and environment is free from side effects basically.
B. corrosion inhibiting and descaling agent provided by the invention to gas heating furnace and other relevant boiler have unusual effect Sweet natural gas water jacket process furnace in filling slowly-releasing Scale inhibitors post-etching speed less than 0.076mm/a.
C. add oxygen scavenger in the corrosion-mitigation scale-inhibition system provided by the invention, can greatly improve corrosion mitigating effect.
Embodiment
Embodiment 1: with a volume 15m
3Gas heating furnace be example, the present invention is applicable to the novel corrosion-retarding Scale inhibitors of gas heating furnace is done further explain.Confirm that through the lacing film experiment the best dosage of soup in stove water is 1.1g/L, by the volume 15m of gas heating furnace
3, can know that each process furnace needs 16.5kg corrosion-mitigation scale-inhibition medicament.
Be applicable to the preparation method of the novel corrosion-retarding Scale inhibitors of gas heating furnace:
A, be mixed with the aqueous solution to solid ingredient
A, the technical grade dodecyl benzyl dimethyl ammonium chloride (1227) that takes by weighing 1.1616kg add the on-the-spot water of 1.4784kg, are made into dodecyl benzyl dimethyl ammonium chloride (1227) aqueous solution of 2.64kg;
B, take by weighing the chemical pure Trisodium Citrate of 0.495kg and add the on-the-spot water of 0.99kg, be made into the sodium citrate aqueous solution of 1.485kg;
C, take by weighing 0.0495kg benzotriazole (BTA) and add the on-the-spot water of 0.0495kg, be made into benzotriazole (BTA) aqueous solution of 0.099kg;
D, take by weighing 0.75kg sodium hydroxide and add 0.75kg water, be mixed with the aqueous sodium hydroxide solution of 1.5kg.
B. prepare B solution
Pressing following order by above-mentioned each aqueous solution mixes:
A, dodecyl benzyl dimethyl ammonium chloride (1227) aqueous solution of 2.64kg is added the sodium citrate aqueous solution of 1.485kg, stir;
B, benzotriazole (BTA) aqueous solution that in above-mentioned solution, adds 0.099kg again stir,
C, to add HEDP (HEDP) liquid mixing of 3.3kg technical grade then even;
D, the last aqueous sodium hydroxide solution that slowly adds 1.5kg, regulating pH is 5.23, obtains B solution.
C: with oxygen scavenger
Take by weighing the 0.165kg vitamins C and add the on-the-spot water of 0.495kg, be made into the vitamins C aqueous solution of 0.66kg;
The vitamins C aqueous solution is slowly added in the B solution, add the on-the-spot water of 6.82kg and stir, obtain the novel corrosion-retarding Scale inhibitors that 16.5kg is applicable to gas heating furnace, be lurid transparent solution.
Embodiment 2
Be applicable to the novel corrosion-retarding Scale inhibitors of gas heating furnace, each weight percentages of components is:
Dodecyl benzyl dimethyl ammonium chloride, 13.5%;
HEDP, 18%;
Trisodium Citrate, 3.5%;
Benzotriazole, 0.1%;
Sodium hydroxide, 3.4%;
Vitamins C, 0.5%;
Water is 61%.
The preparation method is following:
A, be mixed with the aqueous solution to solid ingredient
A, take by weighing the technical grade dodecyl benzyl dimethyl ammonium chloride and add the on-the-spot water of part, be made into the dodecyl benzyl dimethyl ammonium chloride aqueous solution;
B, take by weighing chemical pure Trisodium Citrate and add the on-the-spot water of part, be made into sodium citrate aqueous solution;
C, take by weighing benzotriazole and add the on-the-spot water of part, be made into the benzotriazole aqueous solution;
D, weighing sodium hydroxide add the on-the-spot water of part, the aqueous sodium hydroxide solution that is mixed with;
B. prepare B solution
Above-mentioned each aqueous solution is pressed following order to be mixed:
A, the dodecyl benzyl dimethyl ammonium chloride aqueous solution is added sodium citrate aqueous solution, stir;
B, in above-mentioned solution, add the benzotriazole aqueous solution again and stir,
C, to add the HEDP liquid mixing of technical grade then even;
D, the last aqueous sodium hydroxide solution that slowly adds, regulating pH is 5.23, obtains B solution;
C: with oxygen scavenger
Take by weighing vitamins C and add the on-the-spot water of part, be made into the vitamins C aqueous solution; The vitamins C aqueous solution is slowly added in the B solution, stir after adding remaining on-the-spot water, obtain being applicable to the novel corrosion-retarding Scale inhibitors of gas heating furnace.
The quantity of the on-the-spot water of described part is: can dissolve the material that will add, do not have the quantity limitation of strictness.Those skilled in the art can understand and accomplish.
Embodiment 3
Be applicable to the novel corrosion-retarding Scale inhibitors of gas heating furnace, each weight percentages of components is:
Dodecyl benzyl dimethyl ammonium chloride, 14%;
HEDP, 22%;
Trisodium Citrate, 4%;
Benzotriazole, 0.15%;
Sodium hydroxide, 5%;
Vitamins C, 0.5%;
Be water 54.35.
The preparation method of novel corrosion-retarding Scale inhibitors who is applicable to gas heating furnace is identical with embodiment 2.
Embodiment 4
Be applicable to the novel corrosion-retarding Scale inhibitors of gas heating furnace, each weight percentages of components is:
Dodecyl benzyl dimethyl ammonium chloride, 15%;
HEDP, 24%;
Trisodium Citrate, 4.5%;
Benzotriazole, 0.25%;
Sodium hydroxide, 6%;
Vitamins C, 1%;
Be water 49.25.
The preparation method is identical with embodiment 2.
Embodiment 5
Be applicable to the novel corrosion-retarding Scale inhibitors of gas heating furnace, each weight percentages of components is:
Dodecyl benzyl dimethyl ammonium chloride, 17%;
HEDP, 16%;
Trisodium Citrate, 3%;
Benzotriazole, 0.3%;
Sodium hydroxide, 3%;
Vitamins C, 1%;
Be water 59.7.
The preparation method is identical with embodiment 2.
Embodiment 6
Be applicable to the novel corrosion-retarding Scale inhibitors of gas heating furnace, each weight percentages of components is:
Dodecyl benzyl dimethyl ammonium chloride, 18%;
HEDP, 20%;
Trisodium Citrate, 2.5%;
Benzotriazole, 0.35%;
Sodium hydroxide, 4.4%;
Vitamins C, 1.5%;
Be water 53.25.
The preparation method is identical with embodiment 2.
Claims (2)
1. novel corrosion-retarding Scale inhibitors that is applicable to gas heating furnace, it is characterized in that: each weight percentages of components is:
Dodecyl benzyl dimethyl ammonium chloride, 13～18%;
HEDP, 16～25%;
Trisodium Citrate, 2～4.5%;
Benzotriazole, 0.1～0.35%;
Sodium hydroxide, 3～6%;
Vitamins C, 0.5～1.5%;
All the other are water, and each component percentages sum is absolutely.
2. preparation method who is applicable to the novel corrosion-retarding Scale inhibitors of gas heating furnace is characterized in that:
A, be mixed with the aqueous solution to solid ingredient
A, take by weighing the technical grade dodecyl benzyl dimethyl ammonium chloride and add the on-the-spot water of part, be made into the dodecyl benzyl dimethyl ammonium chloride aqueous solution;
B, take by weighing chemical pure Trisodium Citrate and add the on-the-spot water of part, be made into sodium citrate aqueous solution;
C, take by weighing benzotriazole and add the on-the-spot water of part, be made into the benzotriazole aqueous solution;
D, weighing sodium hydroxide add the on-the-spot water of part, the aqueous sodium hydroxide solution that is mixed with;
B. prepare B solution
Above-mentioned each aqueous solution is pressed following order to be mixed:
A, the dodecyl benzyl dimethyl ammonium chloride aqueous solution is added sodium citrate aqueous solution, stir;
B, in above-mentioned solution, add the benzotriazole aqueous solution again and stir,
C, to add the HEDP liquid mixing of technical grade then even;
D, the last aqueous sodium hydroxide solution that slowly adds, regulating pH is 5～5.5, obtains B solution;
C: with oxygen scavenger
Take by weighing vitamins C and add the on-the-spot water of part, be made into the vitamins C aqueous solution; The vitamins C aqueous solution is slowly added in the B solution, stir after adding remaining on-the-spot water, obtain being applicable to the novel corrosion-retarding Scale inhibitors of gas heating furnace.
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| CN 201210109493 CN102633374B (en) | 2012-04-13 | 2012-04-13 | Novel corrosion and scale inhibitor applicable to natural gas heating furnace |
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| CN 201210109493 CN102633374B (en) | 2012-04-13 | 2012-04-13 | Novel corrosion and scale inhibitor applicable to natural gas heating furnace |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106319539A (en) * | 2016-09-27 | 2017-01-11 | 合肥天翔环境工程有限公司 | Metal scale remover |
| CN106904678A (en) * | 2017-02-08 | 2017-06-30 | 上海南阳精细化工有限公司 | Application of the L vitamin Cs in boiler supply water deaerating corrosion inhibiter |
| CN112592705A (en) * | 2020-12-22 | 2021-04-02 | 西南石油大学 | Ecological safety type scale and corrosion inhibitor and preparation method thereof |
| CN113336342A (en) * | 2021-06-09 | 2021-09-03 | 西安瑞杰实业股份有限公司 | Antiscaling agent for converter gas evaporative cooler, preparation method and application thereof |
| CN115432800A (en) * | 2022-09-19 | 2022-12-06 | 延长油田股份有限公司 | Preparation method of slow-release water deoxidant, product and application thereof |
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| US20090007616A1 (en) * | 2007-07-06 | 2009-01-08 | Bureman Phillip E | Method of inhibiting corrosion on ferrous metal surfaces in contact with nitrogen fertilizer solutions |
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| CN1257841A (en) * | 1998-12-23 | 2000-06-28 | 王福霖 | Corrosion-retarding scale inhibitor for boiler |
| JP2004321907A (en) * | 2003-04-23 | 2004-11-18 | Heisei Riken Kk | Water treatment agent |
| CN1854090A (en) * | 2005-04-25 | 2006-11-01 | 上海万森水处理有限公司 | Antioxidant corrosion-proofing and antisludging agent of boiler |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106319539A (en) * | 2016-09-27 | 2017-01-11 | 合肥天翔环境工程有限公司 | Metal scale remover |
| CN106904678A (en) * | 2017-02-08 | 2017-06-30 | 上海南阳精细化工有限公司 | Application of the L vitamin Cs in boiler supply water deaerating corrosion inhibiter |
| CN112592705A (en) * | 2020-12-22 | 2021-04-02 | 西南石油大学 | Ecological safety type scale and corrosion inhibitor and preparation method thereof |
| CN113336342A (en) * | 2021-06-09 | 2021-09-03 | 西安瑞杰实业股份有限公司 | Antiscaling agent for converter gas evaporative cooler, preparation method and application thereof |
| CN115432800A (en) * | 2022-09-19 | 2022-12-06 | 延长油田股份有限公司 | Preparation method of slow-release water deoxidant, product and application thereof |
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