CN103808896A - Method for testing influence of concentrations of solutions on descaling rate of descaling agent - Google Patents
Method for testing influence of concentrations of solutions on descaling rate of descaling agent Download PDFInfo
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- CN103808896A CN103808896A CN201210486448.XA CN201210486448A CN103808896A CN 103808896 A CN103808896 A CN 103808896A CN 201210486448 A CN201210486448 A CN 201210486448A CN 103808896 A CN103808896 A CN 103808896A
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- descaling
- scale remover
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Abstract
The invention discloses a method for testing influence of concentrations of solutions on a descaling rate of a descaling agent. The method comprises the steps of washing a plurality of experiment containers for later use firstly; then adding a certain amount of scales into the experiment containers; preparing descaling agent solutions with different concentrations; adding equal amount of the anti-scaling agent solutions with different concentrations into the experiment containers respectively; adjusting pH values of the solutions; putting the experiment containers into a water bath to heat; calculating the descaling rate through experiment results and analyzing the influence of concentrations of solutions on the descaling rate of the descaling agent through the calculated descaling rate. The method is capable of quickly testing the influence of concentrations of solutions on the descaling rate of the descaling agent; the method is accurate in testing result and simple in testing steps; through the method, the testing cost is greatly reduced and theoretical basis is provided for the application of the descaling agent.
Description
Technical field
The present invention relates to the method for testing that a kind of scale remover descaling rate is affected by solution concentration.
Background technology
Scale remover is a kind of incrustation scale of removing, and the chemicals of the multiple dirt stain such as dirt, generally forms by various ingredients is composite.Industrial scale remover is mainly used in removing heat transmission equipment, the dirt in boiler etc.
The conventional kind of scale remover and feature thereof:
(1) inorganic polyphosphate.This type of is the scale remover using the earliest, has limited use abroad.In its molecule, there is the P-O-P key of one or more repetitions to exist, can be divided into chain Quadrafos and cyclic polyphosphates.The shortcoming of inorganic polyphosphate is that moisture-sensitive hydrolysis generates orthophosphate, under high temperature and high pH value, more so, reacts and fouling as Ca2+, Mg2+ etc. with bivalent cation.
(2) organophosphate.The machine phosphate of common are has monoalkyl phosphoric acid esters, bisalkyl phosphate, pyrophosphate, polyoxyethylene aliphatic ether phosphate etc.In organophosphate, P-O-C key is stronger than phosphate P-O-P key, and therefore it is than phosphate-stabilized, and hydrolysis temperature is higher than phosphate.Seemingly, when use, consumption is unsuitable too high for the much character of phosphate and phosphoric acid salt, the too high dirt that easily generates on the contrary.Phosphate easily adheres to equipment surface, good with the compatibility of corrosion inhibiter etc., but easily there is emulsification with oils, so need to add non-emulsifier while use in oil field, hydrolysis phenomenon that can be resemble inorganic polyphosphate in the time that temperature exceedes 90 ℃, its hydrolysate also can react and fouling with divalent metal.Strontium sulfate white crystalline powder.Odorlessness.1g is dissolved in about 8800ml water, 700ml 3% nitric acid, 800ml 2% hydrochloric acid, is slightly soluble in alkali chloride solution, concentrated acid, is insoluble to ethanol and dilute sulfuric acid.Relative density 3.96.1605 ℃ of fusing points.Index of refraction 1.624.
(3) organic multicomponent phosphonic acids.C-P key in phosphonic acids is firm, therefore has higher chemical stability and thermal stability, also difficult hydrolysis under high temperature, high pH value condition, nontoxic or low toxicity.For example ethylenediamine tetraacetic methene phosphoric acid still can keep its activity under the high temperature of 200 ℃ and 1013kPa; Carboxyl ethylene-diphosphonic acid just decomposes under the high temperature of 250 ℃.Such scale remover is effective, and dosing is little, and has corrosion inhibition concurrently.Be widely used in oil field water treatment.
(4) aminopolycanboxylic acid's salt.Aminopolycanboxylic acid's salt is a kind of scale remover of better heat stability, as the serviceability temperature of EDTA can reach 200 ℃.This type of scale remover is mainly that the amount therefore adding is many by huge legendary turtle cooperation antiscale, and cost is high, so use and be restricted in the industrial process of a large amount of waters.
In the time that scale remover uses, the concentration of its solution will have a huge impact descale effect, thus be necessary it to test, for the use of scale remover is provided fundamental basis.
Summary of the invention
The object of the invention is to overcome the shortcoming and defect of above-mentioned prior art, the method of testing that provides a kind of scale remover descaling rate affected by solution concentration, the method can test out scale remover descaling rate and be subject to the impact of solution concentration fast, and test result is accurate, testing procedure is simple, greatly reduce testing cost, for the use of scale remover provides theoretical foundation.
Object of the present invention is achieved through the following technical solutions: the method for testing that scale remover descaling rate is affected by solution concentration, comprises step: first, clean several experiment containers for subsequent use; Then, in experiment container, add a certain amount of dirt; Prepare the scale remover solution of variable concentrations; Respectively to the scale remover solution that adds the variable concentrations of equivalent in experiment container; The pH value of regulator solution; Experiment container is placed in to water-bath to be heated: result calculates descaling rate by experiment, by the descaling rate calculating, analyzes scale remover descaling rate and be subject to the impact of solution concentration.
Described experiment container is beaker.
Described dirt is strontium sulfate scale.
The dosage of described scale remover solution is 80ml.
The temperature of described water-bath is 40 ℃, and the water-bath time is 24 hours.
The concentration of described scale remover solution is respectively 10mg/l, 20mg/l, 40mg/l, 50mg/l, 70mg/l.
In sum, the invention has the beneficial effects as follows: can test out fast scale remover descaling rate and be subject to the impact of solution concentration, and test result is accurate, testing procedure is simple, greatly reduces testing cost, for the use of scale remover provides theoretical foundation.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited only to this.
Embodiment:
The method of testing that a kind of scale remover descaling rate the present invention relates to is affected by solution concentration, comprises step: first, clean several experiment containers for subsequent use; Then, in experiment container, add a certain amount of dirt; Prepare the scale remover solution of variable concentrations; Respectively to the scale remover solution that adds the variable concentrations of equivalent in experiment container; The pH value of regulator solution; Experiment container is placed in to water-bath to be heated: result calculates descaling rate by experiment, by the descaling rate calculating, analyzes scale remover descaling rate and be subject to the impact of solution concentration.
Described experiment container is beaker.
Described dirt is strontium sulfate scale.
The dosage of described scale remover solution is 80ml.
The temperature of described water-bath is 40 ℃, and the water-bath time is 24 hours.
The concentration of described scale remover solution is respectively 10mg/l, 20mg/l, 40mg/l, 50mg/l, 70mg/l.
In the time that scale remover uses, the concentration of its solution will have a huge impact descale effect, thus be necessary it to test, for the use of scale remover is provided fundamental basis.In order to obtain concrete numerical value, scale remover of the present invention is DTPA, and dirt is strontium sulfate scale, and experimental result is as shown in the table:
As seen from the above table: scale remover concentration has considerable influence to strontium sulfate descale effect.On the whole, in the time that the scale remover solution with the identical dosage of variable concentrations is tested, scale removal takes the lead in falling rear liter and declines, wherein in the time of 60mg/L, forms maximum peak value.When summing up proper concentration and being 60mg/L, descale effect is best.
The above, be only preferred embodiment of the present invention, not the present invention done to any pro forma restriction, every foundation technical spirit of the present invention, and any simple modification, equivalent variations that above embodiment is done, within all falling into protection scope of the present invention.
Claims (6)
1. scale remover descaling rate is subject to the method for testing that solution concentration affects, and it is characterized in that, comprises step: first, clean several experiment containers for subsequent use; Then, in experiment container, add a certain amount of dirt; Prepare the scale remover solution of variable concentrations; Respectively to the scale remover solution that adds the variable concentrations of equivalent in experiment container; The pH value of regulator solution; Experiment container is placed in to water-bath to be heated: result calculates descaling rate by experiment, by the descaling rate calculating, analyzes scale remover descaling rate and be subject to the impact of solution concentration.
2. the method for testing that scale remover descaling rate according to claim 1 is affected by solution concentration, is characterized in that, described experiment container is beaker.
3. the method for testing that scale remover descaling rate according to claim 1 is affected by solution concentration, is characterized in that, described dirt is strontium sulfate scale.
4. the method for testing that scale remover descaling rate according to claim 1 is affected by solution concentration, is characterized in that, the dosage of described scale remover solution is 80ml.
5. the method for testing that scale remover descaling rate according to claim 1 is affected by solution concentration, is characterized in that, the temperature of described water-bath is 40 ℃, and the water-bath time is 24 hours.
6. the method for testing that scale remover descaling rate according to claim 1 is affected by solution concentration, is characterized in that, the concentration of described scale remover solution is respectively 10mg/l, 20mg/l, 40mg/l, 50mg/l, 70mg/l.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210486448.XA CN103808896A (en) | 2012-11-13 | 2012-11-13 | Method for testing influence of concentrations of solutions on descaling rate of descaling agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210486448.XA CN103808896A (en) | 2012-11-13 | 2012-11-13 | Method for testing influence of concentrations of solutions on descaling rate of descaling agent |
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| Publication Number | Publication Date |
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| CN103808896A true CN103808896A (en) | 2014-05-21 |
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| CN201210486448.XA Pending CN103808896A (en) | 2012-11-13 | 2012-11-13 | Method for testing influence of concentrations of solutions on descaling rate of descaling agent |
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- 2012-11-13 CN CN201210486448.XA patent/CN103808896A/en active Pending
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Application publication date: 20140521 |