CN112079456A - Coal gasification high-temperature grey water scale inhibition and dispersion agent, and preparation method and application thereof - Google Patents
Coal gasification high-temperature grey water scale inhibition and dispersion agent, and preparation method and application thereof Download PDFInfo
- Publication number
- CN112079456A CN112079456A CN202010979137.1A CN202010979137A CN112079456A CN 112079456 A CN112079456 A CN 112079456A CN 202010979137 A CN202010979137 A CN 202010979137A CN 112079456 A CN112079456 A CN 112079456A
- Authority
- CN
- China
- Prior art keywords
- scale inhibition
- dispersion agent
- grey water
- coal gasification
- acid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/14—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
Abstract
The invention discloses a scale inhibition and dispersion agent for high-temperature ash water produced by coal gasification, a preparation method and application thereof, wherein the scale inhibition and dispersion agent comprises the following components in percentage by weight: 10-25% of polyoxyethylene phosphate, 10-30% of polyepoxy succinic acid, 5-12% of acrylic acid-2-methyl-2-acrylamido propanesulfonic acid, 10-25% of hydrolyzed polymaleic anhydride and the balance of water. The grey water scale inhibition and dispersion agent disclosed by the invention is stable in performance and good in cooperativity, has good scale inhibition and dispersion capacity on a grey water gasification system, and has good scale inhibition and dispersion effects on grey water with high temperature, high alkalinity, high hardness and high turbidity; the raw materials of the formula of the invention are low-toxicity or non-toxic, harmless and environment-friendly medicaments, and the production process is simple.
Description
Technical Field
The invention relates to the technical field of scale inhibitors, in particular to a coal gasification high-temperature grey water scale inhibition and dispersion agent, and a preparation method and application thereof.
Background
In the coal gasification production process, ash is gasified and high-temperature to form grey water by raw coal and ash produced in the production process, and the gasified high-temperature grey water is divided into two parts to be discharged: one part is grey water with less solid content in the upper layer of the bottom of the synthetic gas washing tower, and after the grey water is pressurized by a chilling water pump, one part is sent to a Venturi scrubber, and the other part enters a chilling ring of the gasification furnace through a chilling water filter. And the other part of black water with high solid content from the bottom of the synthesis gas washing tower enters a black water flash evaporation system through flow control to be subjected to black water treatment so as to remove solid particles in the black water, and the filtered grey water is returned to the synthesis gas washing tower after being subjected to precipitation, heating and other treatment.
The raw material coal and ash generated in the production process have great influence on the grey water gasification system, so that the problem of precipitation and scaling of the grey water gasification system and the black water gasification system in a pipeline is solved, the high-efficiency and stable production is achieved, and the method has profound significance on the development and the improvement of coal gasification.
In order to improve the water quality environment of the grey water gasification system and reduce the risk of scaling, fouling and blocking; improve the water quality index of the grey water gasification system and reduce the load of the sewage treatment system. The scale inhibitor is usually used, has certain scale inhibition and dispersion effects, but the existing scale inhibitor is used for a coal gasification high-temperature grey water system, and has poor dispersion performance and scale inhibition performance.
Disclosure of Invention
The invention aims to provide a coal gasification high-temperature grey water scale inhibition and dispersion agent, which solves the problem that the existing scale inhibitor has poor dispersion performance and scale inhibition performance.
In addition, the invention also provides a preparation method and application of the coal gasification high-temperature grey water scale inhibition and dispersion agent.
The invention is realized by the following technical scheme:
the scale inhibition and dispersion agent for the coal gasification high-temperature grey water comprises the following components:
polyoxyethylene phosphonate, polyepoxy succinic acid, acrylic acid-2-methyl-2-acrylamide propanesulfonic acid and hydrolyzed polymaleic anhydride.
The raw materials of the scale inhibition and dispersion agent are low-toxicity or non-toxic, harmless and environment-friendly agents. The polyoxyethylene phosphonate, the polyepoxysuccinic acid, the acrylic acid-2-methyl-2-acrylamidopropanesulfonic acid and the hydrolyzed polymaleic anhydride are all the prior art, although a single component in the formula of the invention is commonly used as a scale inhibitor, the technical scheme of combining the polyoxyethylene phosphonate, the polyepoxysuccinic acid, the acrylic acid-2-methyl-2-acrylamidopropanesulfonic acid and the hydrolyzed polymaleic anhydride together is not provided, and the conception of the invention lies in that:
the polyoxyethylene phosphonate, the polyepoxysuccinic acid, the acrylic acid-2-methyl-2-acrylamido propanesulfonic acid and the hydrolyzed polymaleic anhydride are combined to form a new scale inhibitor, all components have mutual synergistic action, and the scale inhibitor has good dispersion performance and scale inhibition performance when applied to a grey water gasification system and a black water system in a coal gasification high-temperature environment
The formula is designed according to the characteristics of the coal gasification high-temperature environment, and the grey water gasification system and the black water system applied to the coal gasification high-temperature environment have good dispersion performance and scale inhibition performance, so that the problem of precipitation and scaling of the gasification grey water and black water systems in pipelines is basically solved.
The scale inhibition and dispersion agent can improve the water quality environment of a grey water system and reduce the risk of scale formation and fouling; the drainage water quality index of the grey water system is improved, and the load of a sewage treatment system is reduced; for the grey water system which is influenced by hardness and silicon and has larger water discharge capacity, the emission reduction of the system can be realized, and the water resource is greatly saved.
Further, the paint comprises the following components in percentage by weight:
10-25% of polyoxyethylene phosphate, 10-30% of polyepoxy succinic acid, 5-12% of acrylic acid-2-methyl-2-acrylamido propanesulfonic acid, 10-25% of hydrolyzed polymaleic anhydride and the balance of water.
The components of the scale inhibition and dispersion agent are designed according to the proportion, and the scale inhibition and dispersion agent has good dispersion performance and scale inhibition performance when being applied to a grey water gasification system and a black water system in a coal gasification high-temperature environment, wherein the dispersion rate is more than 80%, and the scale inhibition rate is more than 85%.
Further, the paint comprises the following components in percentage by weight:
12-25% of polyoxyethylene phosphate, 10-25% of polyepoxysuccinic acid, 6-12% of acrylic acid-2-methyl-2-acrylamido propanesulfonic acid, 18-25% of hydrolyzed polymaleic anhydride and the balance of water.
Further, the molecular weight of the polyepoxysuccinic acid is 400-800.
The scale inhibition effect of the polyepoxysuccinic acid with the component force of 400-800 is selected as follows:
at pH 9.0, { Ca2+}=1000mg/L,{HCO3500mg/L, 80 ℃ for 6 h. When the adding concentration of the polyepoxysuccinic acid is 1mg/L,2mg/L,6mg/L and 10mg/L, the scale inhibition rate of the calcium carbonate is close to that of the calcium carbonateLike 82%, 95%, 99%, 100%.
Namely, the scale inhibition performance of the polyepoxysuccinic acid can be obviously improved by reasonably controlling the concentration of the polyepoxysuccinic acid with the component force of 400-800.
Further, the molecular weight of hydrolyzed polymaleic anhydride is 5000.
The applicant finds out through the realization that:
the scale inhibition performance of hydrolyzed polymaleic anhydride has a large relationship with molecular weight, and the scale inhibition is effective only within a certain molecular weight range, and the obvious influence of the molecular weight on the scale inhibition effect is shown in table 1:
TABLE 1 influence of molecular weight of hydrolyzed polymaleic anhydride on the Scale inhibition Effect
As can be seen from Table 1:
when the molecular weight of the hydrolyzed polymaleic anhydride is 5000, the scale inhibition rate is better, the concentration of the hydrolyzed polymaleic anhydride has certain influence on the scale inhibition rate, but the influence of the relative molecular weight on the scale inhibition rate is smaller.
Further, the concentration of the scale inhibition and dispersion agent is 50 mg/l-100 mg/l.
The preparation method of the coal gasification high-temperature grey water scale inhibition and dispersion agent comprises the following steps:
s1, mixing polyoxyethylene phosphonate and polyepoxysuccinic acid, adding water and stirring uniformly;
s2, adding acrylic acid-2-methyl-2-acrylamido propanesulfonic acid and hydrolyzed polymaleic anhydride to the solution obtained in the step S1, and stirring until the solution is free of suspended matter.
The application of the scale inhibition and dispersion agent for the coal gasification high-temperature grey water is to use the scale inhibition and dispersion agent for scale inhibition of pipelines in coal gasification production.
Further, the scale inhibition and dispersion agent is used for scale inhibition of a grey water gasification system in coal gasification production.
Furthermore, the use concentration of the scale inhibition and dispersion agent is 50mg/l to 100 mg/l.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the scale inhibition and dispersion agent disclosed by the invention is applied to a grey water gasification system and a black water system in a coal gasification high-temperature environment, has good dispersion performance and scale inhibition performance, and has the dispersion rate of more than 80% and the scale inhibition rate of more than 85%.
2. The scale inhibition and dispersion agent can improve the water quality environment of a grey water system and reduce the risk of scale formation and fouling; the drainage water quality index of the grey water system is improved, and the load of a sewage treatment system is reduced; for the grey water system which is influenced by hardness and silicon and has larger water discharge capacity, the emission reduction of the system can be realized, and the water resource is greatly saved.
3. The raw materials of the scale inhibition and dispersion agent are low-toxicity or non-toxic, harmless and environment-friendly agents, and the preparation process is simple.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not used as limitations of the present invention.
Example 1:
the coal gasification high-temperature grey water scale inhibition and dispersion agent comprises the following components in percentage by weight:
12% of polyoxyethylene phosphonate, 13% of polyepoxysuccinic acid, 9% of acrylic acid-2-methyl-2-acrylamidopropanesulfonic acid, 12% of hydrolyzed polymaleic anhydride and the balance of water, wherein the molecular weight of the hydrolyzed polymaleic anhydride is 5000, and the molecular weight of the polyepoxysuccinic acid is 800.
The preparation method of the scale inhibiting and dispersing agent comprises the following steps:
s1, washing the reaction kettle clean, drying the reaction kettle by a fan, closing a discharge valve, and adding the following components in percentage by weight: 650 kg of polyoxyethylene phosphonic acid and 700 kg of polyepoxysuccinic acid, starting a stirrer, and adding 2800 kg of water;
s2, adding 500 kg of acrylic acid-2-methyl-2-acrylamide propyl sulfonic acid and 650 kg of hydrolyzed polymaleic anhydride according to weight percentage into the solution obtained in the step S1, and stirring for 30-45 minutes until the solution is free of suspended matters.
Example 2:
the coal gasification high-temperature grey water scale inhibition and dispersion agent comprises the following components in percentage by weight:
16% of polyoxyethylene phosphonate, 21% of polyepoxysuccinic acid, 12% of acrylic acid-2-methyl-2-acrylamidopropanesulfonic acid, 17% of hydrolyzed polymaleic anhydride and the balance of water, wherein the molecular weight of the hydrolyzed polymaleic anhydride is 5000, and the molecular weight of the polyepoxysuccinic acid is 400.
The preparation method of the scale inhibiting and dispersing agent comprises the following steps:
s1, washing the reaction kettle clean, drying the reaction kettle by a fan, closing a discharge valve, and adding the following components in percentage by weight: 950 kg of polyoxyethylene phosphonate and 1200 kg of polyepoxy succinic acid, opening a stirrer, and adding 2000 kg of water;
s2, adding 700 kilograms of acrylic acid-2-methyl-2-acrylamide propyl sulfonic acid and 1000 kilograms of hydrolyzed polymaleic anhydride according to weight percentage into the solution obtained in the step S1, and stirring for 30-45 minutes until the solution has no suspended matters.
Example 3:
the coal gasification high-temperature grey water scale inhibition and dispersion agent comprises the following components in percentage by weight:
10% of polyoxyethylene phosphate, 25% of polyepoxysuccinic acid, 5% of acrylic acid-2-methyl-2-acrylamidopropanesulfonic acid, 20% of hydrolyzed polymaleic anhydride and the balance of water, wherein the molecular weight of the hydrolyzed polymaleic anhydride is 5000, and the molecular weight of the polyepoxysuccinic acid is 600.
The preparation method of the scale inhibiting and dispersing agent comprises the following steps:
s1, washing the reaction kettle clean, drying the reaction kettle by a fan, closing a discharge valve, and adding the following components in percentage by weight: 400 kg of polyoxyethylene phosphonate and 1000 kg of polyepoxy succinic acid, opening a stirrer, and adding 1600 kg of water;
s2, adding 200 kg of acrylic acid-2-methyl-2-acrylamide propyl sulfonic acid and 800 kg of hydrolyzed polymaleic anhydride according to weight percentage into the solution obtained in the step S1, and stirring for 30-45 minutes until the solution has no suspended matters.
Comparative example 1:
this comparative example is based on example 3, differing from example 3 in that:
the formula does not contain polyepoxysuccinic acid, and equivalent polyoxyethylene phosphonate is used for replacement.
Comparative example 2:
this comparative example is based on example 3, differing from example 3 in that:
the formula does not contain polyoxyethylene phosphonate, and the equivalent polyepoxysuccinic acid is used for replacement.
Comparative example 3:
this comparative example is based on example 3, differing from example 3 in that:
the formula does not contain acrylic acid-2-methyl-2-acrylamide propanesulfonic acid, and the same amount of hydrolyzed polymaleic anhydride is used for replacement.
Comparative example 4:
this comparative example is based on example 3, differing from example 3 in that:
the formula does not contain hydrolyzed polymaleic anhydride, and the same amount of acrylic acid-2-methyl-2-acrylamide propanesulfonic acid is used for replacement.
Comparative example 5:
this comparative example is based on example 3, differing from example 3 in that:
the formula does not contain polyepoxysuccinic acid and acrylic acid-2-methyl-2-acrylamide propanesulfonic acid, and equivalent polyoxyethylene phosphonate and hydrolytic polymaleic anhydride are used for replacement.
Comparative example 6:
this comparative example is based on example 3, differing from example 3 in that:
the formula does not contain polyoxyethylene phosphonate and hydrolytic polymaleic anhydride, and equal amount of polyepoxysuccinic acid and acrylic acid-2-methyl-2-acrylamide propanesulfonic acid are used for replacement.
Comparative example 7:
this comparative example is based on example 3, differing from example 3 in that:
the molecular weight of the hydrolyzed polymaleic anhydride is 10000.
Comparative example 8:
this comparative example is based on example 3, differing from example 3 in that:
the molecular weight of the polyepoxysuccinic acid is 1000.
The dispersion experiment and the scale inhibition experiment are respectively carried out on the above examples 1 to 3 and comparative examples 1 to 8, and the specific processes are as follows:
dispersion experiment:
the experimental environment is as follows: grey water turbidity 200, test temperature: 200 ℃, test pressure: 4.0MPa test time: the adding concentration of the medicament is 50mg/l, 80mg/l and 100mg/l respectively after 5 hours. (the concentration here means the amount of scale inhibiting dispersant added per grey water) the results of the experiment are shown in Table 2:
TABLE 2
Scale inhibition experiment: the suspended substance of the grey water is 100mg/l less, the alkalinity is 500mg/l, the hardness is 1000mg/l, and the test temperature is as follows: 200 ℃, test pressure: 4.0MPa test time: the adding concentration of the medicament is respectively 40mg/l, 80mg/l and 100mg/l after 5 hours, and the experimental result (scale inhibition rate) is shown in the following table 3:
TABLE 3
Serial number | Medicament | 50mg/l | 80mg/l | 100mg/l |
1 | Example 1 | 87.2% | 91.5% | 96.5% |
4 | Example 2 | 85.8% | 90.5% | 96.7% |
5 | Example 3 | 88.5% | 94.5% | 98.9% |
6 | Comparative example 1 | 76.6% | 82.8% | 91% |
7 | Comparative example 2 | 75.2% | 80.8% | 87% |
8 | Comparative example 3 | 78.5% | 84.3% | 92.5% |
9 | Comparative example 4 | 74.5% | 78.8% | 86.7% |
10 | Comparative example 5 | 30.5% | 34.8% | 40.5% |
11 | Comparative example 6 | 52.3% | 58.6% | 67.8% |
12 | Comparative example 7 | 80.6% | 84.8% | 89.6% |
13 | Comparative example 8 | 82.4% | 87.0% | 92.5% |
As can be seen from table 1 and table 2 data:
1) the dispersion performance and the scale inhibition performance of the grey water dispersing agent are superior to those of a comparative example medicament, and the dispersing ability is strong.
2) All components in the grey water dispersing agent provided by the invention are mutually synergistic, so that the dispersing performance and the scale inhibition performance are jointly improved.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The scale inhibition and dispersion agent for the coal gasification high-temperature grey water is characterized by comprising the following components:
polyoxyethylene phosphonate, polyepoxy succinic acid, acrylic acid-2-methyl-2-acrylamide propanesulfonic acid and hydrolyzed polymaleic anhydride.
2. The coal gasification high-temperature grey water scale inhibition and dispersion agent of claim 1, which is characterized by comprising the following components in percentage by weight:
10-25% of polyoxyethylene phosphate, 10-30% of polyepoxy succinic acid, 5-12% of acrylic acid-2-methyl-2-acrylamido propanesulfonic acid, 10-25% of hydrolyzed polymaleic anhydride and the balance of water.
3. The coal gasification high-temperature grey water scale inhibition and dispersion agent of claim 2, which is characterized by comprising the following components in percentage by weight:
12-25% of polyoxyethylene phosphate, 10-25% of polyepoxysuccinic acid, 6-12% of acrylic acid-2-methyl-2-acrylamido propanesulfonic acid, 18-25% of hydrolyzed polymaleic anhydride and the balance of water.
4. The coal gasification high temperature grey water scale inhibition and dispersion agent as claimed in claim 1, wherein the molecular weight of the polyepoxysuccinic acid is 400-800-.
5. The coal gasification high temperature grey water scale inhibition and dispersion agent of claim 1, wherein the molecular weight of the hydrolyzed polymaleic anhydride is 5000.
6. The coal gasification high temperature grey water scale inhibition and dispersion agent according to any one of claims 1 to 5, wherein the concentration of the scale inhibition and dispersion agent is 50mg/l to 100 mg/l.
7. The preparation method of the coal gasification high temperature grey water scale inhibition and dispersion agent according to any one of claims 1 to 6, characterized by comprising the following steps:
s1, mixing polyoxyethylene phosphonate and polyepoxysuccinic acid, adding water and stirring uniformly;
s2, adding acrylic acid-2-methyl-2-acrylamido propanesulfonic acid and hydrolyzed polymaleic anhydride to the solution obtained in the step S1, and stirring until the solution is free of suspended matter.
8. The application of the coal gasification high temperature grey water scale inhibition and dispersion agent according to any one of claims 1 to 6, wherein the scale inhibition and dispersion agent is used for scale inhibition of pipelines in coal gasification production.
9. The application of the coal gasification high-temperature grey water scale inhibition and dispersion agent according to claim 8 is characterized in that the scale inhibition and dispersion agent is used for scale inhibition of a grey water gasification system in coal gasification production.
10. The application of the coal gasification high-temperature grey water scale inhibition and dispersion agent as claimed in claim 9, wherein the use concentration of the scale inhibition and dispersion agent is 50 mg/l-100 mg/l.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202010979137.1A CN112079456A (en) | 2020-09-17 | 2020-09-17 | Coal gasification high-temperature grey water scale inhibition and dispersion agent, and preparation method and application thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202010979137.1A CN112079456A (en) | 2020-09-17 | 2020-09-17 | Coal gasification high-temperature grey water scale inhibition and dispersion agent, and preparation method and application thereof |
Publications (1)
Publication Number | Publication Date |
---|---|
CN112079456A true CN112079456A (en) | 2020-12-15 |
Family
ID=73736839
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202010979137.1A Pending CN112079456A (en) | 2020-09-17 | 2020-09-17 | Coal gasification high-temperature grey water scale inhibition and dispersion agent, and preparation method and application thereof |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN112079456A (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001098558A2 (en) * | 2000-06-22 | 2001-12-27 | United States Filter Corporation | Corrosion control utilizing a hydrogen peroxide donor |
CN103708632A (en) * | 2014-01-13 | 2014-04-09 | 湖南东盈煤化工技术开发有限公司 | Grey water antiscale dispersion agent for gasification |
CN108251087A (en) * | 2018-01-23 | 2018-07-06 | 中国石油天然气股份有限公司 | Carbon dioxide flooding injection well annulus protection fluid and preparation method and use method thereof |
-
2020
- 2020-09-17 CN CN202010979137.1A patent/CN112079456A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001098558A2 (en) * | 2000-06-22 | 2001-12-27 | United States Filter Corporation | Corrosion control utilizing a hydrogen peroxide donor |
CN103708632A (en) * | 2014-01-13 | 2014-04-09 | 湖南东盈煤化工技术开发有限公司 | Grey water antiscale dispersion agent for gasification |
CN108251087A (en) * | 2018-01-23 | 2018-07-06 | 中国石油天然气股份有限公司 | Carbon dioxide flooding injection well annulus protection fluid and preparation method and use method thereof |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN105174512B (en) | A kind of processing method of brackish water and a kind of saliferous water treatment system | |
CN100434376C (en) | A low-phosphorus environment-friendly composite corrosion and scale inhibitor for treating circulating cooling water and its application method | |
CN104692545B (en) | A kind of boiler and supply line antisludging agent | |
CN113912195A (en) | Non-phosphorus scale inhibitor for inhibiting silicon scale and preparation method thereof | |
CN105032195A (en) | Scale inhibitor for reverse osmosis membrane and preparation method of scale inhibitor | |
CN107261855A (en) | A kind of reverse osmosis antisludging agent | |
CN114656046B (en) | Scale inhibitor for waste paper papermaking wastewater system and preparation method thereof | |
CN111500803A (en) | Hot-disintegrating treatment device and method for recycling strong brine in steel slag | |
CN108017763B (en) | Corrosion and scale inhibition combined medicament and preparation method thereof | |
CN112079456A (en) | Coal gasification high-temperature grey water scale inhibition and dispersion agent, and preparation method and application thereof | |
CN114853240A (en) | Natural balance ultrahigh concentration multiple and zero discharge control method for circulating cooling water system | |
KR20110057118A (en) | Boiler water treatment agent and water treatment method | |
CN112279385A (en) | Reverse osmosis membrane scale inhibitor and preparation method and application thereof | |
CN110627230B (en) | Coal gasification high-hardness high-alkalinity slag water phosphorus-free scale inhibition and dispersion agent | |
CN111439854A (en) | Non-phosphorus scale inhibition and dispersion agent for sewage treatment and preparation method thereof | |
CN116969611B (en) | Corrosion and scale inhibition mixture and application thereof | |
CN114426338A (en) | Non-phosphorus scale and corrosion inhibitor and preparation method and application thereof | |
CN105776475A (en) | Compound polysilicate aluminum water purifying agent | |
CN114262073A (en) | High-efficiency ash water dispersant and preparation method thereof | |
CN114835231A (en) | Nano flocculant for realizing in-situ energy expansion and preparation method thereof | |
CN113845263A (en) | A kind of equipment and process for reducing ammonia nitrogen index of coal gasification water system | |
CN109179699B (en) | Combined scale inhibition and dispersion agent of coal gasification system and application method thereof | |
CN106396144A (en) | A water stabilizing agent for middle- and low-pressure steam boilers | |
CN119263505B (en) | A composite multi-effect scale and corrosion inhibitor and preparation method thereof | |
CN1176226A (en) | Alkali reduction wastewater treatment method |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
RJ01 | Rejection of invention patent application after publication | ||
RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201215 |