CN101239757A - Desulfurizing waste water processing device antiscaling agent and antiscaling method - Google Patents
Desulfurizing waste water processing device antiscaling agent and antiscaling method Download PDFInfo
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- CN101239757A CN101239757A CNA2008100856721A CN200810085672A CN101239757A CN 101239757 A CN101239757 A CN 101239757A CN A2008100856721 A CNA2008100856721 A CN A2008100856721A CN 200810085672 A CN200810085672 A CN 200810085672A CN 101239757 A CN101239757 A CN 101239757A
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- scale inhibitor
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- waste water
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/40—Organic compounds containing sulfur
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/22—Eliminating or preventing deposits, scale removal, scale prevention
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention provides a scale inhibitor adopted in a desulfurization wastewater treatment device which using sodium hypochlorite as a main treating reagent, and a scale inhibiting method. The scale inhibitor has citric acid, water-soluble complexing agent, negative charge coat agent and scale damaging agent as effective elements. The scale inhibitor is capable of preventing scale generating and attaching on the desulfurization wastewater treatment device which uses sodium hypochlorite as a main treating reagent, further capable of removing the generated and attached scale.
Description
Technical field
The present invention relates to clorox is used as the scale inhibitor and the antiscaling method of the desulfurizing waste water processing device of main reagent treatment.Further relate to and be used to prevent and remove at the dirt (Scale) that clorox (NaClO) is generated on the desulfurizing waste water processing device of the reagent treatment of deciding and adhere to, contain citric acid, water-soluble complexing agent, negative charge coating-forming agent and broken dirty agent scale inhibitor and antiscaling method as effective constituent.
Background technology
In the stack gas (Flue Gas) that from fuel-burning power plant, boiler such as system ironworks etc., produces, not only comprise fuel and airborne oxygen reaction and the ash (Ash) that produces, also comprise sulfurous gas (SO
2), sulphur trioxide (SO
3) wait oxysulfide (SO
x).These oxysulfides not only become the reason of atmosphere pollution, also can become the cause of acid rain etc., so in the fossil oil operation, all comprise the flue gas desulfurization (FGD) operation (FGD:Flue Gas Desulferization) of removing the oxysulfide that comprises in the stack gas usually.
Fig. 1 is the synoptic diagram of the general flow direction of the stack gas that generates of the boiler that is used for illustrating from the fuel-burning power plant etc.
Stack gas from boiler (110) generation, through electronic dust catcher (EP:ElectrostaticPrecipitator) 120, remove the dust that wherein comprises, through the sweetener as absorption tower 130, after removing the oxysulfide that wherein comprises, be discharged to the outside through chimney 150.In this process, stack gas will be by stack gas before the sweetening process and the gas-gas-heat exchanger (GGH:Gas-Gas Heat Exchanger) 140 that carries out heat exchange through the stack gas after the sweetening process.
The flue gas desulfurization (FGD) operation is to utilize reagent and catalyzer, remove the method that is included in the sulfide that comprises oxysulfide in the stack gas after the burning by operations such as absorption, oxidation, reduction and absorption, be divided into modes such as dry type, wet type, half dry type substantially.But, usually mainly in the power station etc. adopt good economy performance, speed of response is fast and the Wet-type desulfuration method of device miniaturization.
Wet-type desulfuration method is, by cleaning flue gases such as water or alkaline solutions, absorbs the method for the oxysulfide that comprises in the stack gas, and one time resultant becomes solution or slurries form.Wet-type desulfuration method has the advantage that speed of response is fast, can realize the miniaturization of auxiliary equipment.But, in the Wet-type desulfuration method,,, have the shortcoming that generates a large amount of waste water along with operation so need the reheat process because raising force in chimney 150 is low through expellant gas temperature after the operation is low.Usually using in the more Wet-type desulfuration method is to utilize lime or Wingdale as the operation of absorption reaction agent, generally can remove the oxysulfide more than 90%.
General wet type Wingdale flue gas desulfurization (FGD) operation is as follows.Make after the stack gas that firing system generates is removed dust by electronic dust catcher 120, stack gas is contacted with lime stone slurry (Slurry).Like this, make oxysulfide and Wingdale (CaCO
3) reaction and produce and to comprise CaSO
3Or CaSO
4Slurries Deng solid sediment.At last, inject the forced oxidation air, generate gypsum (CaSO to the bottom, absorption tower
4H
2O).
The gypsum that generates in absorption tower 130 can be used as high purity industry gypsum through dehydration, can discharge minuteness particle and water in the gypsum in this process.At this moment, the water of discharge is desulfurization wastewater, is transported to desulfurizing waste water processing device 200 described later, handles and discharges.
Fig. 2 is the synoptic diagram of the structure of the desulfurizing waste water processing device of common clorox being used the reagent treatment of deciding in the expression Coal-fired power plant.
Desulfurizing waste water processing device 200 is the devices that are used for handling from the waste water of sweetener discharge, by physics, chemical treatment, removal suspended matter (SS:Suspended Solid), heavy metal, chemical oxygen demand (COD) (COD:Chemical Oxygen Demand) become to grade, and are processed in the environment regulations scope and discharge afterwards.
130 desulfurization wastewaters that are transported to desulfurizing waste water processing device 200 from the absorption tower, at first in pre-treatment groove 210, precipitate the heavier gypsum particle in the desulfurization wastewater, after separating a removal part, first reactive tank 220 in first reactive tank, 220 to the 3rd reactive tanks 224, carry out oxide treatment by clorox, and reduce chemical oxygen demand (COD).
The desulfurization wastewater that has passed through first reactive tank 220 is through second reactive tank 222, in the 3rd reactive tank 224, by sodium bisulfite (NaHSO
3) remove remaining clorox, the sexavalent chrome (Cr that toxicity is stronger
6+) be reduced to the more weak trivalent chromium (Cr of toxicity
3+).
The desulfurization wastewater of discharging from the 3rd reactive tank 224 is temporarily stored in after the daily groove 230, at the 4th reactive tank 240 with the 5th reactive tank 242 appends caustic soda (NaOH) and agglutinant reacts, then, make precipitation and removals such as fluorine, heavy metal at first settling bath (250).
The desulfurization wastewater that has passed through first settling bath 250 enters the 6th reactive tank 260 and the 7th reactive tank 262, re-injects caustic soda, yellow soda ash (Na at the 6th reactive tank 260 and the 7th reactive tank 262
2CO
3) and after agglutinant reacts, precipitation is removed calcium ion and remaining heavy metal in second settling bath 270, adjust groove 280 at a PH pH value is adjusted to neutrality, through filtration tank (290), adjust groove 292 at the 2nd PH and once more pH value is reduced to acidity (about PH3～PH4) afterwards, remove fluorine at fluorine absorber (294).The desulfurization wastewater (this moment, waste water became the treating water of finishing processing substantially) of having removed fluorine after final PH adjustment groove (296) is adjusted to neutrality with pH value, is discharged to the outside, discharges.
On the other hand, comprised coal ash, fine gypsum particle, chlorion, heavy metal, suspended solids, COD very various composition that becomes to grade in the desulfurization wastewater, in wastewater treatment process, as dirt especially morely on the inwall and stirrer, survey meter etc. attached to the 3rd reactive tank (224), because adhering to of this dirt, cause the processing capacity of reactive tank to reduce, survey meter carries out wrong work etc., has problems such as reaction efficiency is low, the water quality treatment of desulfurization wastewater worsens, treatment capacity also reduces.Moreover, each apparatus damage of desulfurizing waste water processing device 200 or the danger of breaking down increase, in order to remove the dirt that has adhered to physics mode, need interrupt the running of desulfurizing waste water processing device (200) repeatedly with the short cycle, need remove dirty operation at enclosed space, and the safety that causes the staff is subjected to bigger threat etc., has various serious problems.
In order to address this is that, to develop and using Sodium Nitrite (NaNO
2) and ferrous sulfate (FeSO
4) wait the scale inhibitor that uses with in the desulfurizing waste water processing device of main reagent treatment that deals with desulfurization wastewater.
But this general scale inhibitor is to end ferrous sulfate (FeSO
4) use and replace using sodium bisulfite (NaHSO
3), prevent the apposition growth of calcified material (as gypsum particle) as minuteness particle, so will be hardly by the clorox of the complex chemical compound of strong acid or highly basic dissolved silicon (Si) and calcium (Ca) as dirty main component, in the desulfurizing waste water processing device 200 with the reagent treatment of deciding, just there is the problem that can't suppress and remove dirt.
Summary of the invention
In order to address the above problem, the object of the present invention is to provide a kind of scale inhibitor and antiscaling method, be used for reducing and preventing at desulfurizing waste water processing device generation that clorox is used as main reagent treatment and the dirt that adheres to.
To achieve these goals, the invention provides a kind of scale inhibitor of desulfurizing waste water processing device, with the reagent treatment of deciding, described scale inhibitor contains citric acid, water-soluble complexing agent, negative charge coating-forming agent and broken dirty agent as effective constituent to described desulfurizing waste water processing device with clorox.
And, another object of the present invention provides a kind of antiscaling method of desulfurizing waste water processing device, described desulfurizing waste water processing device with clorox with the reagent treatment of deciding, in the described antiscaling method, to contain citric acid, water-soluble complexing agent, negative charge coating-forming agent and broken dirty agent scale inhibitor, to second reactive tank and the 3rd reactive tank injection 450ppm～500ppm of the desulfurizing waste water processing device of clorox being used the reagent treatment of deciding as effective constituent.
As mentioned above, according to the present invention, not only can prevent from the desulfurizing waste water processing device of clorox being used the reagent treatment of deciding, to generate and adhere to dirt, but also can remove the dirt that has generated and adhered to.
In addition, in order to remove calcium ion, by end to flow into the yellow soda ash (Na of the 7th reactive tank always
2CO
3) injection, can also prevent to be accumulated in the soft dirt on the 7th reactive tank inwall.
Thereby, do not need to remove the operation of dirt by physics mode, can stablize and handle desulfurization wastewater sleekly, can further keep the water quality of final processing well, can prevent for the personnel's that devote oneself to work non-efficient with physics mode processing dirt, but the security incident (suffocation accident etc.) that the prevention work personnel are taken place in the process of removing dirt.
Description of drawings
Fig. 1 is the synoptic diagram of the general flow direction of the stack gas that generates of the boiler that is used for illustrating from the fuel-burning power plant etc.
Fig. 2 is the synoptic diagram of structure of the general desulfurizing waste water processing device of expression Coal-fired power plant.
Embodiment
Below, the preferred embodiment that present invention will be described in detail with reference to the accompanying.At first, when being noted that the integrant attached drawings mark to each accompanying drawing,,, make it have identical mark as far as possible though be illustrated on the different accompanying drawings for identical integrant.In addition, when explanation is of the present invention, when being considered to influence the main idea of the present invention that should mainly illustrate, just omit its detailed description when relevant known configurations or to specifying of function.
The scale inhibitor that adopts in the desulfurizing waste water processing device of the reagent treatment that clorox usefulness is decided that preferred embodiment of the present invention relates to is by containing citric acid (C
6H
8O
7), one or more the combination in water-soluble complexing agent, negative charge coating-forming agent and the broken dirty agent, suppress dirt and generate, and remove the dirt that has generated, by further containing Quilonum Retard (Li
2CO
3) and acetic acid (CH
3COOH), the defluorination of making a return journey, and make water as solvent.
Here, citric acid at first with desulfurization wastewater in calcium ion (Ca
2+) in conjunction with and generate Citrate trianion (Citrate), make and in the neutral water coolant, also can dissolve, thereby calcium ion can not be combined with other mineral ions and be reacted into firm dirty particle, not only can prevent the desulfurizing waste water processing device corrosion, and harmless, so very suitable effective constituent as scale inhibitor.
In addition, water-soluble complexing agent can make metal ion in the desulfurization wastewater, especially make iron ion (Fe
3+) and aluminum ion (AL
3+) wait and be generated as water soluble complex, prevent that iron ion and aluminum ion and other molecule be combined intos from being dirt, otherwise, the silicon (Si) that iron ion and aluminum ion are can aggegation viscosity strong and firm and the particle of calcified material, the promotion dirt adheres to.As this water-soluble complexing agent, suitable use diethylene-triamine pentaacetic acid (DTPA:Diethylene Triamine Pentaacetic Acid) or methylene phosphonic acid (Methylene Phosphonic Acid) etc., but be not limited to this.
In addition, the negative charge coating-forming agent is by making negative charge on silicon and calcified material and other the firm compound particles bands, prevents mutual aggegation growth and becomes dirt.As this negative charge coating-forming agent, the suitable amino trimethylammonium phosphonic acids of use (ATMP:Aminotrimethyl Phosphonic Acid) etc., but be not limited to this.
In addition, broken dirty agent is a kind of threshold effect (Threshold Effect) agent, when minuteness particle (SS:Suspended Solid) is assembled mutually or adhered to into dirt, crystallization self is broken, and prevents the generation of dirt, and can also remove the dirt that has generated.Can preferably use 1-hydroxy ethylene-1 (1-Hydroxy Ethylidene-1) or 1-phosphonic acids (1-phosphonic Acid) etc. as this broken dirty agent, but be not limited to this.
Below, being used for clorox as the scale inhibitor of the desulfurizing waste water processing device of main reagent treatment and the embodiment and the actual use-case that makes of antiscaling method that preferred embodiment of the present invention relates to is described.
For hold that preferred embodiment of the present invention relates to antiscaling effect and the removal effect of clorox as the scale inhibitor in the desulfurizing waste water processing device of main reagent treatment, produce scale inhibitor with ratio of components as shown in table 1, second reactive tank (222) and the 3rd reactive tank (224) in the desulfurizing waste water processing device of clorox being used the reagent treatment of deciding are for the test portion 200ml injection 450ppm～500ppm of desulfurization wastewater.
Ratio of components and application target that table 1 shows that preferred embodiment of the present invention relates to the effective constituent that contains in the scale inhibitor of clorox with the desulfurizing waste water processing device of the reagent treatment of deciding.Here, Quilonum Retard and acetic acid are in order to remove the fluorine in the desulfurization wastewater, can to add as required.
Table 1:
Experimental result when injecting the scale inhibitor with ratio of components shown in the table 1 as described above in the test portion of desulfurization wastewater is shown in table 2.
Table 2
| Project | Before using scale inhibitor | After using scale inhibitor |
| Minuteness particle (mg) | 57.3 | 4.1 |
| COD(ppm) | 25.0 | 21.0 |
Table 2 be compared that preferred embodiment of the present invention relates to clorox with the experimental result before and after the use of the scale inhibitor of the desulfurizing waste water processing device of the reagent treatment of deciding.
As shown in table 2, can confirm after the scale inhibitor of the desulfurizing waste water processing device of clorox being used the reagent treatment of deciding that uses preferred embodiment of the present invention to relate to, minuteness particle and chemical oxygen demand (COD) (COD:Chemical Oxygen Demand is designated hereinafter simply as " COD ") reduce.The minuteness particle of the immediate cause that especially can confirm to become the generation of dirt and adhere to significantly reduces.
For what further hold that preferred embodiment of the present invention relates to clorox is prevented effect and removal effect with the dirt of the scale inhibitor in the desulfurizing waste water processing device of the reagent treatment of deciding, scale inhibitor with the effective constituent ratio of components shown in the table 1, to second reactive tank (222) and three reactive tank (224) of clorox with the desulfurizing waste water processing device of the reagent treatment of deciding injected about 2 months continuously, in order to confirm best injection rate, with respect to the influx of desulfurization wastewater, inject 250ppm, 350ppm, 450ppm, 550ppm, 650ppm.
This result of experiment is shown in table 3～table 5.
Table 3:
Table 3 is the scale inhibitors in the desulfurizing waste water processing device of representing preferred embodiment of the present invention is related to of clorox being used the reagent treatment of deciding, the analytical results of the water quality of the desulfurization wastewater before and after using according to different implantation concentrations.Here, the water quality of the desulfurization wastewater before using scale inhibitor, judge according to the COD of the inflow water of first reactive tank 220 and the content of fluorine (F), use the water quality of the desulfurization wastewater after the scale inhibitor, judge according to the COD of the inflow water of first settling bath 250 and the content of fluorine.
As shown in table 3, when the implantation concentration of scale inhibitor was 450ppm～500ppm, the content of COD and fluorine was minimum, so most preferably inject the scale inhibitor that its implantation concentration is 450ppm～500ppm.
Table 4:
Table 4 illustrates the scale inhibitor of clorox being used the desulfurizing waste water processing device of the reagent treatment of deciding that preferred embodiment of the present invention is related to, with the continuous result who injects of 450ppm.
The scale inhibitor of 450ppm is injected continuously to second reactive tank (222) and the 3rd reactive tank (224), if relatively before using scale inhibitor and flow into COD, the minuteness particle of the discharge water of the inflow water of first settling bath (250) and final discharging, the content of fluorine afterwards, then as shown in table 4, can confirm that its content reduces.
Table 5:
(unit: cm)
| Distinguish | Before the use | Use after 2 months |
| The dirty thickness of the 3rd reactive tank | 2.0 | 1.5 |
Table 5 be expression preferred embodiment of the present invention relate to clorox with the dirty measuring result before and after the use of the scale inhibitor in the desulfurizing waste water processing device of reagent treatment of deciding.
The result of the dirt of the inwall of measurement the 3rd reactive tank (224) before the use scale inhibitor, the thickness of dirt is about 2cm, uses the result of dirt process dirt of the inwall of measurement the 3rd reactive tank (224) after about 2 months, and the thickness of dirt is reduced to 1.5cm.
Can know that by the result shown in the table 5 scale inhibitor not only plays generation that prevents dirt and the effect of adhering to, removal has generated and the effect of the dirt that adheres to but also can play.
Aforesaid explanation is that example illustrates technological thought of the present invention, so long as have those skilled in the art of present technique field general knowledge, can carry out multiple correction and distortion in the scope that does not break away from intrinsic propesties of the present invention.Thereby the embodiment that discloses among the present invention is used for limiting technological thought of the present invention, and in order to describe, can not limited because of these embodiment in the technological thought scope of the present invention.Protection scope of the present invention should be to be stipulated by claims, with its equivalency range in all technological thoughts all should be interpreted as being included in the claim scope of the present invention.
Claims (8)
1. the scale inhibitor of a desulfurizing waste water processing device, wherein, described desulfurizing waste water processing device with the reagent treatment of deciding, is characterized in that clorox,
Described scale inhibitor contains citric acid, water-soluble complexing agent, negative charge coating-forming agent and broken dirty agent as effective constituent.
2. the scale inhibitor of using according to claim 1 is characterized in that,
Described scale inhibitor contains the citric acid of 7.7 weight percents, the water-soluble complexing agent of 5.7 weight percents, the negative charge coating-forming agent of 4.2 weight percents, the broken dirty agent of 3.2 weight percents and the water of surplus.
3. scale inhibitor according to claim 1 is characterized in that,
Described scale inhibitor also contains Quilonum Retard and acetic acid.
4. scale inhibitor according to claim 3 is characterized in that,
Described Quilonum Retard is 11.1 weight percents, and described acetic acid is 4.2 weight percents.
5. scale inhibitor according to claim 1 is characterized in that,
Described water-soluble complexing agent is diethylene-triamine pentaacetic acid or methylene phosphonic acid.
6. scale inhibitor according to claim 1 is characterized in that,
Described broken dirty agent is 1-hydroxy ethylene-1 or 1-phosphonic acids.
7. scale inhibitor according to claim 1 is characterized in that,
Described negative charge coating-forming agent is amino trimethylammonium phosphonic acids.
8. the antiscaling method of a desulfurizing waste water processing device is used for the desulfurizing waste water processing device of clorox with the reagent treatment of deciding be is characterized in that,
With each described scale inhibitor in the claim 1～7, to second reactive tank and the 3rd reactive tank injection 450ppm～500ppm of the desulfurizing waste water processing device that clorox is used as main reagent treatment.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2007-0002485 | 2007-01-09 | ||
| KR1020070002485A KR100848286B1 (en) | 2007-01-09 | 2007-01-09 | Scale Preventer and Scale Preventing Method for Wastewater Disposal Facility in Flue Gas Desulfurization System Using Sodium Hypochlorite |
| KR1020070002485 | 2007-01-09 |
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| Publication Number | Publication Date |
|---|---|
| CN101239757A true CN101239757A (en) | 2008-08-13 |
| CN101239757B CN101239757B (en) | 2013-05-15 |
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|---|---|
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| CN (1) | CN101239757B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102807288A (en) * | 2012-07-13 | 2012-12-05 | 湖北海力化工科技有限公司 | Scale inhibitor for limestone wet-process desulphurization and preparation method thereof |
| CN108425122A (en) * | 2018-03-23 | 2018-08-21 | 江西铜业集团有限公司 | A kind of electrolytic copper foil titanium-based oxide coated anode surface scale minimizing technology |
| CN110467966A (en) * | 2019-08-07 | 2019-11-19 | 安徽海德化工科技有限公司 | One vegetable oil desulphurization plant desulfurizing agent and preparation method thereof |
| WO2021159072A1 (en) * | 2020-02-07 | 2021-08-12 | Flex-Chem Holding Company, Llc | Iron control as part of a well treatment using time-released agents |
| WO2021159066A1 (en) * | 2020-02-07 | 2021-08-12 | Flex-Chem Holding Company, Llc | Iron control as part of a well treatment using time-released agents |
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| KR101910635B1 (en) * | 2016-11-30 | 2018-10-24 | (주) 테크로스 | Method for treating wastewater from flue gas desulfurization using electrolysis device |
| KR102065713B1 (en) * | 2018-07-19 | 2020-01-14 | (주) 테크로스 | Method for treating wastewater from flue gas desulfurization using electrolysis device |
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| US4708805A (en) * | 1986-11-24 | 1987-11-24 | Muhala Thomas F D | Barium sulfate removal and anti-deposition compositions and process of use therefor |
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| US5259985A (en) * | 1990-09-03 | 1993-11-09 | Katayama Chemical, Incorporated | Calcium carbonate scale inhibitor having organophosphonate, water soluble acrylic or maleic copolymer and citric acid |
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| KR100573184B1 (en) * | 2004-03-30 | 2006-04-24 | 한국남부발전 주식회사 | Scale Preventer for Wastewater Disposal Facility in Flue Gas Desulfurization System |
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| CN102807288A (en) * | 2012-07-13 | 2012-12-05 | 湖北海力化工科技有限公司 | Scale inhibitor for limestone wet-process desulphurization and preparation method thereof |
| CN108425122A (en) * | 2018-03-23 | 2018-08-21 | 江西铜业集团有限公司 | A kind of electrolytic copper foil titanium-based oxide coated anode surface scale minimizing technology |
| CN110467966A (en) * | 2019-08-07 | 2019-11-19 | 安徽海德化工科技有限公司 | One vegetable oil desulphurization plant desulfurizing agent and preparation method thereof |
| WO2021159072A1 (en) * | 2020-02-07 | 2021-08-12 | Flex-Chem Holding Company, Llc | Iron control as part of a well treatment using time-released agents |
| WO2021159066A1 (en) * | 2020-02-07 | 2021-08-12 | Flex-Chem Holding Company, Llc | Iron control as part of a well treatment using time-released agents |
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| US11473002B2 (en) | 2020-02-07 | 2022-10-18 | Flex-Chem Holding Company, Llc | Iron control as part of a well treatment using time-released agents |
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Also Published As
| Publication number | Publication date |
|---|---|
| KR20080065394A (en) | 2008-07-14 |
| CN101239757B (en) | 2013-05-15 |
| KR100848286B1 (en) | 2008-07-25 |
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