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
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- 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
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- scale inhibition
- dispersion agent
- grey water
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- 230000005764 inhibitory process Effects 0.000 title claims abstract description 69
- 239000006185 dispersion Substances 0.000 title claims abstract description 53
- 239000010797 grey water Substances 0.000 title claims abstract description 52
- 238000002309 gasification Methods 0.000 title claims abstract description 48
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 41
- 239000003245 coal Substances 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 229920000141 poly(maleic anhydride) Polymers 0.000 claims abstract description 32
- 229920001529 polyepoxysuccinic acid Polymers 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- -1 polyoxyethylene phosphate Polymers 0.000 claims abstract description 22
- XOHCVEDNEBOCBH-UHFFFAOYSA-N 2-methyl-2-(prop-2-enoylamino)propane-1-sulfonic acid;prop-2-enoic acid Chemical compound OC(=O)C=C.OS(=O)(=O)CC(C)(C)NC(=O)C=C XOHCVEDNEBOCBH-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 claims abstract description 7
- KDYFGRWQOYBRFD-NUQCWPJISA-N butanedioic acid Chemical compound O[14C](=O)CC[14C](O)=O KDYFGRWQOYBRFD-NUQCWPJISA-N 0.000 claims abstract description 5
- KCXFHTAICRTXLI-UHFFFAOYSA-N propane-1-sulfonic acid Chemical compound CCCS(O)(=O)=O KCXFHTAICRTXLI-UHFFFAOYSA-N 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 2
- 239000003814 drug Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 239000002994 raw material Substances 0.000 abstract description 4
- 231100000053 low toxicity Toxicity 0.000 abstract description 3
- 231100000252 nontoxic Toxicity 0.000 abstract description 3
- 230000003000 nontoxic effect Effects 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 26
- 239000010866 blackwater Substances 0.000 description 10
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 7
- 239000002455 scale inhibitor Substances 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- 239000002270 dispersing agent Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 238000005406 washing Methods 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000002401 inhibitory effect Effects 0.000 description 4
- 238000001035 drying Methods 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 239000003657 drainage water Substances 0.000 description 2
- 230000003301 hydrolyzing effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
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- 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.
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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 | A kind of carbon dioxide drive injection well annular protective liquid and preparation method thereof and application method |
-
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 | A kind of carbon dioxide drive injection well annular protective liquid and preparation method thereof and application method |
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Application publication date: 20201215 |