CN113754080A - Coal gasification ash water dispersant and application thereof - Google Patents
Coal gasification ash water dispersant and application thereof Download PDFInfo
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- CN113754080A CN113754080A CN202111057677.5A CN202111057677A CN113754080A CN 113754080 A CN113754080 A CN 113754080A CN 202111057677 A CN202111057677 A CN 202111057677A CN 113754080 A CN113754080 A CN 113754080A
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- water
- coal gasification
- block polyether
- dispersing agent
- quaternary ammonium
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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
- 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
- C02F5/12—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 nitrogen
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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
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
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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 relates to a coal gasification grey water dispersing agent, which comprises a grey water dispersing agent compound of quaternary ammonium salt and block polyether, wherein the compound is prepared by dissolving 10-90 wt% of quaternary ammonium salt and 10-90 wt% of block polyether in deionized water. The dispersing agent for gasified ash water is prepared by dissolving quaternary ammonium salt and block polyether in deionized water according to a certain proportion and compounding, the quaternary ammonium salt and the block polyether can form an adsorption layer on the surfaces of ash suspended matters and colloid particles, so that the growth and precipitation of dirt in water can be effectively prevented to form hard scale, meanwhile, the good permeability of the block polyether is utilized to facilitate the quaternary ammonium salt to permeate into the interior of the scale forming particles, and the functions of dispersion, solubilization, permeation and scale inhibition of the quaternary ammonium salt and the colloid particles are compounded and cooperated to ensure that the dirt in the gasified ash water is soft and easy to clean, so that the dispersion scale inhibition function of the ash water dispersing agent is greatly enhanced, the adding concentration of the ash water dispersing agent can be reduced, and the processing cost of gasified ash water is further reduced.
Description
Technical Field
The invention belongs to the field of coal chemical industry water treatment, and particularly relates to a coal chemical industry grey water dispersing agent.
Background
The coal gasification grey water has the characteristics of high temperature, high pressure, high turbidity, high hardness, high alkalinity and the like, so that adverse phenomena such as deposition, scaling and the like are easily generated in the circulating operation process of the coal gasification grey water, thereby seriously influencing the normal and stable operation of the coal gasification equipment. In order to effectively slow down the influence of grey water scaling on production equipment, reduce the discharge capacity and improve the repeated utilization rate of the grey water, the coal gasification grey water treatment process widely adopts a chemical agent treatment method added with a grey water dispersing agent.
At present, the field of coal gasification grey water treatment process generally adopts an anionic surface active component grey water dispersing agent, but because of the diversity of the surface electrical property and the existing state of scale forming particles in water, the dispersion scale inhibition effect of the grey water dispersing agent which only takes the anionic surface active component as a main body is limited to a certain extent. The ash water dispersing agent in the current market is a compound product generally composed of organic phosphonic acid, polycarboxylic acid, sulfonate copolymer, hydrolyzed polymaleic anhydride, polyepoxysuccinic acid, polyaspartic acid and the like, and has dispersing and scale inhibiting effects on suspended particles such as carbonate, sulfate, silicate, hydrated iron oxide and the like. The addition concentration of the grey water dispersing agent in the coal gasification grey water is higher, so that the dispersion scale inhibition performance of the coal gasification grey water can reach an ideal effect, and if the addition concentration is lower, the required dispersion scale inhibition performance cannot be realized, so that the use cost is higher.
Disclosure of Invention
The present invention is directed to solving the above-mentioned problems of the prior art grey water dispersants, and an object of the present invention is to provide a grey water dispersant capable of solving the above-mentioned problems.
In order to achieve the purpose, the invention is realized by the following technical scheme: the grey water dispersing agent comprises a grey water dispersing agent compound of quaternary ammonium salt and block polyether, wherein the compound is prepared by dissolving 10-90 wt% of quaternary ammonium salt and 10-90 wt% of block polyether in deionized water.
As a further improvement of the grey water dispersing agent, the quaternary ammonium salt is one or more of dodecyl dimethyl benzyl ammonium chloride, dodecyl dimethyl benzyl ammonium bromide and dodecyl trimethyl ammonium chloride.
As a further improvement of the grey water dispersing agent, the block polyether is a hydrophilic block polyether with an HLB value of more than 10.
As a further improvement of the grey water dispersing agent, the block polyether is one or more of L35, L45, L64, F38 and F68.
The invention also aims to provide application of the coal gasified ash water dispersing agent, which can be used as an ash water scale inhibition and dispersion agent in a coal water slurry gasification process and a pulverized coal gasification process.
As a further improvement of the application of the grey water dispersing agent, the coal water slurry gasification process comprises a coal water slurry gasification process of a Texaco furnace, a multi-nozzle opposed type furnace, an E-Gas furnace and a Jinhua furnace.
As a further improvement of the application of the grey water dispersing agent, the pulverized coal gasification process comprises the pulverized coal gasification process of an aerospace furnace, a shell furnace and an oriental furnace.
The invention has the beneficial effects that: 1) the coal gasification ash water dispersing agent is prepared by dissolving quaternary ammonium salt and block polyether in deionized water according to a certain proportion and compounding, wherein the quaternary ammonium salt is a cationic surfactant, has broad-spectrum and high-efficiency sterilization and algae removal capability and is mainly applied to the field of non-oxidizing bactericides; the block polyether is usually composed of Polyoxyethylene (PEO) and polyoxypropylene (PPO), is a random copolymer of EO (ethylene oxide) and PO (propylene oxide), and is widely applied to the fields of decontamination, emulsification, wetting, penetration, solubilization, lubrication, antistatic property and the like due to good surface activity; according to the invention, the quaternary ammonium salt and the block polyether are compounded according to a certain proportion, the quaternary ammonium salt and the block polyether can form an adsorption layer on the surfaces of ash suspended matters and colloid particles, so that the growth and precipitation of dirt in water can be effectively prevented to form hard scale, meanwhile, the good permeability of the block polyether is utilized to facilitate the quaternary ammonium salt to permeate into the interior of the scale forming particles, and the functions of dispersion, solubilization, permeation and scale inhibition of the quaternary ammonium salt and the block polyether are compounded and cooperated to ensure that the dirt in coal gasification ash water is soft and easy to clean, so that the dispersion scale inhibition function of the ash water dispersing agent is greatly enhanced, the adding concentration of the ash water dispersing agent can be reduced, and the coal gasification ash water treatment cost is further reduced; 2) the grey water dispersing agent disclosed by the invention has excellent water quality adaptability, heat-resistant stability and high-concentration scaling factor tolerance of the coal gasification grey water, can play excellent dispersing and scale inhibiting properties in a grey water system with high temperature, high hardness, high alkalinity and high turbidity, and ensures long-period stable operation of a gasification device; 3) the coal gasification ash water dispersing agent disclosed by the invention can be suitable for coal water slurry gasification processes such as Texaco (Texaco), multi-nozzle opposed type, E-Gas and Jinhua furnaces, and can also be suitable for ash water treatment in pulverized coal gasification processes such as aerospace furnaces, shell furnaces and oriental furnaces, the influence of ash water scaling on production equipment can be effectively relieved, the discharge capacity can be reduced, and the repeated utilization rate of ash water is improved.
Detailed Description
The technical solutions of the present invention are described clearly and completely by the following embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The coal gasification grey water dispersing agent comprises 90% of dodecyl dimethyl benzyl ammonium chloride (1227) and 10% of block polyether L35 which are dissolved in deionized water by dry weight and are compounded.
Example 2
The coal gasification grey water dispersing agent comprises 90% of dodecyl dimethyl benzyl ammonium chloride (1227) and 10% of block polyether L64 which are dissolved in deionized water by dry weight and are compounded.
Example 3
The coal gasification grey water dispersing agent comprises 90% of dodecyl dimethyl benzyl ammonium chloride (1227) and 10% of block polyether F68 which are dissolved in deionized water by dry weight and are compounded.
Example 4
A coal gasification grey water dispersing agent is prepared by dissolving 50% of dodecyl dimethyl benzyl ammonium chloride (1227), 40% of dodecyl dimethyl benzyl ammonium bromide and 10% of block polyether L35 in deionized water according to dry weight and compounding.
Example 5
The coal gasification grey water dispersing agent comprises dodecyl dimethyl benzyl ammonium chloride (1227) accounting for 50% of dry weight, dodecyl trimethyl ammonium chloride (1231) accounting for 40% of dry weight and block polyether L35 accounting for 10% of dry weight, which are dissolved in deionized water to be compounded.
Example 6
A coal gasification grey water dispersing agent is prepared by dissolving 50% of dodecyl dimethyl benzyl ammonium bromide, 40% of dodecyl trimethyl ammonium chloride (1231) and 10% of block polyether L35 in deionized water according to dry weight and compounding.
Example 7
A coal gasification grey water dispersing agent is prepared by dissolving 40% of dodecyl dimethyl benzyl ammonium chloride (1227), 25% of dodecyl dimethyl benzyl ammonium bromide, 25% of dodecyl trimethyl ammonium chloride (1231) and 10% of block polyether L35 in deionized water according to dry weight and compounding.
Example 8
A coal gasification grey water dispersing agent is prepared by dissolving 40% of dodecyl dimethyl benzyl ammonium chloride (1227), 25% of dodecyl dimethyl benzyl ammonium bromide, 25% of dodecyl trimethyl ammonium chloride (1231) and 10% of block polyether L64 in deionized water according to dry weight and compounding.
Example 9
A coal gasification grey water dispersing agent is prepared by dissolving 40% of dodecyl dimethyl benzyl ammonium chloride (1227), 25% of dodecyl dimethyl benzyl ammonium bromide, 25% of dodecyl trimethyl ammonium chloride (1231) and 10% of block polyether F68 in deionized water according to dry weight and compounding.
Example 10
The coal gasification grey water dispersing agent comprises, by dry weight, 30% of dodecyl dimethyl benzyl ammonium chloride (1227), 20% of dodecyl dimethyl benzyl ammonium bromide, 10% of dodecyl trimethyl ammonium chloride (1231), 20% of block polyether L35, 10% of block polyether L64 and 10% of block polyether F68 which are dissolved in deionized water to prepare the coal gasification grey water dispersing agent.
Example 11
The coal gasification grey water dispersing agent comprises 10% of dodecyl dimethyl benzyl ammonium chloride (1227), 30% of block polyether L35, 30% of block polyether L64 and 30% of block polyether F68 by dry weight, and is prepared by dissolving the components in deionized water.
Example 11
The coal gasification grey water dispersing agent comprises 10 percent of dodecyl dimethyl benzyl ammonium bromide, 30 percent of block polyether L35, 30 percent of block polyether L64 and 30 percent of block polyether F68 which are dissolved in deionized water by dry weight and are compounded.
Example 12
The coal gasification grey water dispersing agent comprises 10% of dodecyl trimethyl ammonium chloride (1231), 30% of block polyether L35, 30% of block polyether L64 and 30% of block polyether F68 by dry weight, and is prepared by dissolving the components in deionized water.
Comparative test
In a plurality of high-pressure reaction kettles containing grey water samples, the grey water dispersing agents in the examples 1-12 and two existing grey water scale inhibition dispersing agents with certain concentrations are correspondingly added as a comparative example 1 and a comparative example 2 respectively, and the proportioning scheme of each component in each example is shown in table 1.
The following table shows that after the grey water dispersing agents of examples 1 to 12 and the grey water scale inhibition dispersing agents of comparative examples 1 and 2 are added, the temperature of the reaction kettle is increased to 300 ℃, the internal air pressure is 6.5MPa, the temperature is kept for 8 hours, after the temperature is reduced to normal temperature, index analysis is carried out on a grey water sample after the test, the scale state is observed, and the scale inhibition rate is calculated, and the test results are as follows:
as can be seen from the above table, the scale inhibition rate can be ensured to reach more than 90.3% only when the adding concentration of the existing grey water scale inhibition and dispersion agent reaches 80mg/L, and the scale inhibition rate is only more than 76.8% when the adding concentration is 50mg/L, but in the embodiments 1-12 of the invention, the adding concentration only needs 50mg/L, and the scale inhibition rate can basically reach more than 95%.
The comparative tests show that the ash water dispersing agent can obviously enhance the dispersion scale inhibition performance of ash in coal gasification ash water, and when the coal gasification ash water is treated, the adding concentration of the ash water dispersing agent can be reduced by 30%, so that the treatment cost of coal gasification ash water can be greatly reduced, and the economic benefit can be improved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A coal gasification grey water dispersant is characterized in that: the composition comprises a gray water dispersing agent compound of quaternary ammonium salt and block polyether, wherein the compound is prepared by dissolving 10-90 wt% of quaternary ammonium salt and 10-90 wt% of block polyether in deionized water.
2. The coal gasification grey water dispersant of claim 1, characterized in that: the quaternary ammonium salt is one or more of dodecyl dimethyl benzyl ammonium chloride, dodecyl dimethyl benzyl ammonium bromide and dodecyl trimethyl ammonium chloride.
3. The coal gasification grey water dispersant of claim 1, characterized in that: the block polyether is hydrophilic block polyether with HLB value greater than 10.
4. The coal gasification grey water dispersant of claim 1, characterized in that: the block polyether is one or more of L35, L45, L64, F38 and F68.
5. Use of the coal gasification ash water dispersant according to any one of claims 1 to 4, characterized in that: can be used as a grey water scale inhibition and dispersion agent in a coal water slurry gasification process and a pulverized coal gasification process.
6. Use of the coal gasification grey water dispersant according to claim 5, characterized in that: the coal water slurry gasification process comprises a coal water slurry gasification process of a Texaco furnace, a multi-nozzle opposed type furnace, an E-Gas furnace and a Jinhua furnace.
7. Use of the coal gasification grey water dispersant according to claim 5, characterized in that: the pulverized coal gasification process comprises the pulverized coal gasification process of an aerospace furnace, a shell furnace and an oriental furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111057677.5A CN113754080A (en) | 2021-09-09 | 2021-09-09 | Coal gasification ash water dispersant and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111057677.5A CN113754080A (en) | 2021-09-09 | 2021-09-09 | Coal gasification ash water dispersant and application thereof |
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| Publication Number | Publication Date |
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| CN113754080A true CN113754080A (en) | 2021-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111057677.5A Pending CN113754080A (en) | 2021-09-09 | 2021-09-09 | Coal gasification ash water dispersant and application thereof |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101069827A (en) * | 2007-03-23 | 2007-11-14 | 上海点阵材料科技有限公司 | Block dispersant and preparing method |
| CN107916121A (en) * | 2017-11-24 | 2018-04-17 | 威海翔泽新材料科技有限公司 | A kind of tar ammonia release agent |
-
2021
- 2021-09-09 CN CN202111057677.5A patent/CN113754080A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101069827A (en) * | 2007-03-23 | 2007-11-14 | 上海点阵材料科技有限公司 | Block dispersant and preparing method |
| CN107916121A (en) * | 2017-11-24 | 2018-04-17 | 威海翔泽新材料科技有限公司 | A kind of tar ammonia release agent |
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