CN100447222C - Pitch slurry and its preparation method - Google Patents

Abstract

A coal tar pitch water slurry and a preparation method thereof belong to the technical field of waste residue treatment and the fields of energy and environmental protection, and mainly solve the problem that coal tar pitch is difficult to burn directly. It is characterized in that the coal tar pitch water slurry is a liquid fuel with fluidity, and its composition and mass ratio are: coal tar pitch powder 50%-60%, water 38%-49.5%, dispersant 0.5%-2%, and its preparation The method is to first freeze the medium-temperature coal tar pitch fragments with a softening point of 85-95°C or the high-temperature coal tar pitch fragments with a softening point of 100-110°C for 20-28 hours at the embrittlement temperature of -30-15°C, and add surface active After dispersant, it is pulverized, and then sieved to obtain coal tar pitch powder with a particle size of 200-320 mesh, and then the coal tar pitch powder is added to the aqueous solution of the dispersant, and stirred evenly to make it has good fluidity, good atomization performance, and high combustion efficiency. High coal tar pitch water slurry fuel with low pollutant emission.

Description

A kind of coal tar pitch water slurry and preparation method thereof

technical field

The invention discloses a method for preparing coal tar pitch water slurry, which belongs to the technical field of waste residue treatment and the fields of energy and environmental protection.

Background technique

Coal tar pitch is the residue after distillation of the volatile fraction in coal tar, mainly composed of polycyclic aromatic hydrocarbons and their derivatives and heterocyclic compounds, accounting for about 50%-60% of coal tar, except for the preparation of electrode pitch, In addition to anti-corrosion of building materials and road asphalt, it can also be used as fuel. However, when coal tar pitch is burned directly, due to its condensed aromatic ring structure and high viscosity, it is difficult to burn completely, resulting in a large amount of black smoke and causing environmental pollution.

Pitch-water slurry (PWS for short) is a clean liquid alternative fuel being developed with the help of coal-water slurry technology, which can be widely used in various heat engines, burners and high-grade industrial furnaces, etc. , has attracted the attention of the world's energy sector. At present, domestic asphalt water slurry is prepared by using the by-products of heavy oil or residual oil with a softening temperature greater than 120°C as raw materials, and is prepared through physical processes such as emulsification and compounding. There are no reports on the preparation of coal pitch-water slurry (Coal Pitch-Water Slurry, abbreviated as CPWS) with coal pitch as raw material. If the coal tar pitch water slurry can be developed and industrialized, it will not only bring market opportunities and economic benefits to coal tar processing enterprises, but also discover new fuel varieties will be of great significance to alleviate air pollution and fuel oil supply shortage in our country.

Contents of the invention

The purpose of the invention of a coal tar pitch water slurry and its preparation method is to utilize the abundant coal tar pitch resources in my country to develop a high-efficiency and low-pollution fuel and to disclose a technical proposal for a preparation method of the coal tar pitch water slurry.

The present invention relates to a coal tar pitch water slurry and a preparation method thereof. The coal tar pitch water slurry is characterized by a fluid liquid fuel, which can be transported by a pump at room temperature, and has a low calorific value of 19.63 to 24.77 MJ/Kg. The composition and The mass ratio is: coal tar pitch powder 50%-60%, water 38%-49.5%, dispersant 0.5%-2%, and the dispersant is sulfonate type anionic surfactant, betaine type amphoteric surfactant agent or quaternary ammonium salt type cationic surfactant.

The invention discloses a method for preparing a coal tar pitch water slurry, which is characterized in that the coal tar pitch powder obtained by freezing and pulverizing is added to a dispersant aqueous solution under the action of a high-speed shear force, and the coal tar pitch water slurry is prepared evenly by stirring.

I. Composition and mass ratio

Coal tar pitch powder 50%～60%

Water 38%～49.5%

Dispersant 0.5%～2%

II. Process

The medium-temperature coal tar pitch fragments with a softening point of 85-95°C or the high-temperature coal tar pitch fragments with a softening point of 100-110°C are frozen at the embrittlement temperature of -30-15°C for 20-28 hours, and after adding a surfactant, the It is crushed and sieved to obtain coal tar pitch powder with a particle size of 200-320 mesh; the dispersant is stirred and dissolved in water, and then the prepared coal tar pitch powder is added under the action of high-speed shear force, and the coal tar pitch is obtained by stirring evenly. water slurry.

The preparation method of above-mentioned a kind of coal pitch water slurry is characterized in that described surfactant is sodium dodecylsulfonate, sodium dodecylbenzenesulfonate, OP-10 or JL-C01 quaternary ammonium salt Type surfactant (manufacturer is Luohe Tianlong Chemical Co., Ltd., product batch number is 2060804C01-01), the mass addition amount is 0.5～1%.

The above-mentioned preparation method of coal tar pitch water slurry is characterized in that the dispersant is selected from sulfonate type anionic surfactant, betaine type amphoteric surfactant or quaternary ammonium salt type cationic surfactant. Wherein the sulfonate type anionic surfactant refers to sodium dodecylsulfonate, sodium dodecylbenzenesulfonate, sodium dodecylnaphthalenesulfonate, sodium lignosulfonate or sodium petroleum sulfonate; betaine Type amphoteric surfactant refers to dodecyl betaine, dodecyl dimethyl betaine, octadecyl dimethyl betaine, dodecyl dimethyl propyl betaine, dodecyl dimethyl betaine, dodecyl dimethyl betaine Hydroxypropyl sultaine, lauryl sultaine, lauryl amidopropyl betaine, fatty amidopropyl betaine or cocamidopropyl betaine; quaternary ammonium cationic surfactant refers to ten Dialkyltrimethylammonium chloride, dodecyltrimethylammonium bromide, cetyltrimethylammonium bromide, cetyltrimethylammonium chloride, octadecyltrimethylammonium Ammonium Chloride, Octadecyltrimethylammonium Bromide, Didecyldimethylammonium Chloride, Didecyldimethylammonium Bromide, Didodecyldimethylammonium Chloride, Didecyldimethylammonium Dodecyldimethylammonium bromide, dodecyldimethylbenzylammonium chloride, or dodecyldimethylbenzylammonium bromide.

The advantages of the coal tar pitch water slurry and its preparation method of the present invention are that the coal tar pitch water slurry is a new type of environmentally friendly liquid fuel, which has the characteristics of good fluidity, good atomization performance, high combustion efficiency and low pollutant discharge, and can It can be transported by long-distance pipelines, and can be transported by car tanker, railway tanker and ship; it can be stably ignited and burned, not only retains the combustion characteristics similar to coal, but also has the application characteristics of liquid fuel. It can replace oil, coal or gas in the fields of industrial boilers, power plant boilers and industrial kilns.

Detailed ways:

Embodiment 1

Freeze the medium-temperature coal tar pitch fragments with a softening point of 85°C at -30°C for 24 hours, add 0.5% sodium dodecylsulfonate, crush them with a pulverizer, and sieve them with a 200-mesh standard unified sieve to obtain Coal tar pitch powder.

Add 0.5 g of sodium dodecyl sulfonate to 49.5 g of water and stir to dissolve, then add 50 g of coal tar pitch powder under the action of high-speed shear force, and stir evenly to prepare coal tar pitch water slurry. The coal tar pitch water slurry is a fluid liquid fuel, which can be pumped at room temperature, and has a low calorific value of 19.63MJ/Kg.

Embodiment 2

Freeze the medium-temperature coal tar pitch fragments with a softening point of 90°C at 15°C for 22 hours, add 1% sodium dodecylbenzenesulfonate, crush them with a pulverizer, and sieve them with a 240-mesh standard unified sieve to obtain Coal tar pitch powder.

Add 1 g of sodium dodecylbenzene sulfonate to 49 g of water and stir to dissolve, then add 50 g of coal tar pitch powder under the action of high-speed shear force, and stir evenly to prepare coal tar pitch water slurry. The coal tar pitch water slurry is a fluid liquid fuel, which can be pumped at room temperature, and has a low calorific value of 19.67MJ/Kg.

Embodiment 3

Freeze the medium-temperature coal tar pitch fragments with a softening point of 95°C at 5°C for 20 hours, add 0.6% of JL-C01 quaternary ammonium salt surfactant, crush them with a pulverizer, and sieve with a 280-mesh standard unified sieve. Coal tar pitch powder is produced.

Add 2 g of sodium dodecyl naphthalene sulfonate to 38 g of water and stir to dissolve, then add 60 g of coal tar pitch powder under the action of high-speed shear force, and stir evenly to prepare coal tar pitch water slurry. The coal tar pitch water slurry is a fluid liquid fuel, which can be pumped at room temperature, and has a low calorific value of 24.57MJ/Kg.

Embodiment 4

Freeze high-temperature coal tar pitch fragments with a softening point of 100°C at 0°C for 28 hours, add 1% sodium dodecylsulfonate, crush them with a pulverizer, and sieve them with a 240-mesh standard unified sieve to obtain coal asphalt powder.

Add 1.5 g of sodium lignosulfonate into 48.5 g of water and stir to dissolve, then add 50 g of coal tar pitch powder under the action of high-speed shear force, and stir evenly to prepare coal tar pitch water slurry. The coal tar pitch water slurry is a fluid liquid fuel, which can be pumped at room temperature, and has a low calorific value of 20.13MJ/Kg.

Embodiment 5

The medium-temperature coal tar pitch fragments with a softening point of 90°C were frozen at -25°C for 24 hours, after adding 0.8% OP-10, they were pulverized with a pulverizer, and then sieved with a 320-mesh standard unified sieve to obtain coal tar pitch powder.

Add 0.5 g of sodium petroleum sulfonate to 44.5 g of water and stir to dissolve, then add 55 g of coal tar pitch powder under the action of high-speed shear force, and stir evenly to prepare coal tar pitch water slurry. The coal tar pitch water slurry is a fluid liquid fuel, which can be pumped at room temperature, and has a low calorific value of 22.85MJ/Kg.

Embodiment 6

The medium-temperature coal tar pitch fragments with a softening point of 95°C were frozen at -25°C for 20 hours, added with 0.7% sodium dodecylbenzenesulfonate, pulverized with a pulverizer, and then sieved with a 240-mesh standard unified sieve to prepare Get coal tar pitch powder.

Add 0.5 g of lauryl betaine to 49.5 g of water and stir to dissolve, then add 50 g of coal tar pitch powder under the action of high-speed shear force, stir evenly, and prepare coal tar pitch water slurry. The coal tar pitch water slurry is a fluid liquid fuel, which can be pumped at room temperature, and has a low calorific value of 19.72MJ/Kg.

Embodiment 7

The medium-temperature coal tar pitch fragments with a softening point of 97°C were frozen at 15°C for 23 hours, and after adding 0.9% OP-10, they were pulverized with a pulverizer, and then sieved with a 200-mesh standard unified sieve to obtain coal tar pitch powder.

Add 1 g of dodecyl dimethyl betaine to 49 g of water and stir to dissolve, then add 50 g of coal tar pitch powder under the action of high-speed shear force, and stir evenly to prepare a coal tar pitch water slurry. The coal tar pitch water slurry is a fluid liquid fuel, which can be pumped at room temperature, and has a low calorific value of 19.78MJ/Kg.

Embodiment 8

Freeze the medium-temperature coal tar pitch fragments with a softening point of 95°C at 5°C for 26 hours, add 1% JL-C01 quaternary ammonium salt surfactant, crush them with a pulverizer, and sieve with a 280-mesh standard unified sieve. Coal tar pitch powder is produced.

Add 2 g of octadecyl dimethyl betaine to 38 g of water and stir to dissolve, then add 60 g of coal tar pitch powder under the action of high-speed shear force, and stir evenly to prepare a coal tar pitch water slurry. The coal tar pitch water slurry is a fluid liquid fuel, which can be pumped at room temperature, and has a low calorific value of 24.64MJ/Kg.

Embodiment 9

Freeze the medium-temperature coal tar pitch pieces with a softening point of 90°C at 10°C for 27 hours, add 0.5% sodium dodecylsulfonate, crush them with a pulverizer, and sieve them with a 240-mesh standard unified sieve to obtain coal asphalt powder.

Add 1 g of dodecyl dimethyl propyl betaine to 49 g of water and stir to dissolve, then add 50 g of coal tar pitch powder under the action of high-speed shear force, stir evenly, and prepare coal tar pitch water slurry. The coal tar pitch water slurry is a fluid liquid fuel, which can be transported by a pump at room temperature, and has a low calorific value of 20.16MJ/Kg.

Embodiment 10

The medium-temperature coal tar pitch fragments with a softening point of 95°C were frozen at -25°C for 25 hours, and after adding 1% OP-10, they were pulverized with a pulverizer, and then sieved with a 320-mesh standard unified sieve to obtain coal tar pitch powder.

Add 0.5 g of dodecyl hydroxypropyl sulfobetaine to 44.5 g of water and stir to dissolve, then add 55 g of coal tar pitch powder under the action of high-speed shear force, stir evenly, and prepare coal tar pitch water slurry. The coal tar pitch water slurry is a fluid liquid fuel, which can be pumped at room temperature, and has a low calorific value of 22.67MJ/Kg.

Embodiment 11

Freeze high-temperature coal tar pitch fragments with a softening point of 105°C at 10°C for 23 hours, add 0.6% sodium dodecylsulfonate, crush them with a pulverizer, and sieve them with a 200-mesh standard unified sieve to obtain Coal tar pitch powder.

Add 1 g of dodecyl sultaine to 49 g of water and stir to dissolve, then add 50 g of coal tar pitch powder under the action of high-speed shear force, and stir evenly to prepare a coal tar pitch water slurry. The coal tar pitch water slurry is a fluid liquid fuel, which can be pumped at room temperature, and has a low calorific value of 19.89MJ/Kg.

Embodiment 12

Freeze the medium-temperature coal tar pitch fragments with a softening point of 90°C at -15°C for 24 hours, add 0.8% sodium dodecylsulfonate, crush them with a pulverizer, and sieve them with a 200-mesh standard unified sieve to obtain Coal tar pitch powder.

Add 0.5 g of lauryl amidopropyl betaine to 49.5 g of water and stir to dissolve, then add 50 g of coal tar pitch powder under the action of high-speed shear force, stir evenly, and prepare coal tar pitch water slurry. The coal tar pitch water slurry is a fluid liquid fuel, which can be pumped at room temperature, and has a low calorific value of 19.87MJ/Kg.

Embodiment 13

Freeze the high-temperature coal tar pitch fragments with a softening point of 103°C at -5°C for 20 hours, add 1% OP-10, crush them with a pulverizer, and sieve them with a 240-mesh standard unified sieve to obtain coal tar pitch powder.

Add 1 g of fatty amidopropyl betaine to 49 g of water and stir to dissolve, then add 50 g of coal tar pitch powder under the action of high-speed shear force, stir evenly, and prepare coal tar pitch water slurry. The coal tar pitch water slurry is a fluid liquid fuel, which can be pumped at room temperature, and has a low calorific value of 19.91MJ/Kg.

Embodiment 14

Freeze the medium-temperature coal tar pitch fragments with a softening point of 95°C at 5°C for 22 hours, add 1% JL-C01 quaternary ammonium salt surfactant, crush them with a pulverizer, and sieve with a 280-mesh standard unified sieve. Coal tar pitch powder is produced.

Add 2 g of cocamidopropyl betaine to 38 g of water and stir to dissolve, then add 60 g of coal tar pitch powder under the action of high-speed shear force, stir evenly, and prepare coal tar pitch water slurry. The coal tar pitch water slurry is a fluid liquid fuel, which can be pumped at room temperature, and has a low calorific value of 24.68MJ/Kg.

Embodiment 15

Freeze the medium-temperature coal tar pitch fragments with a softening point of 90°C at -10°C for 24 hours, add 0.9% sodium dodecylsulfonate, crush them with a pulverizer, and sieve them with a 240-mesh standard unified sieve to obtain Coal tar pitch powder.

Add 1 g of dodecyltrimethylammonium chloride to 49 g of water and stir to dissolve, then add 50 g of coal tar pitch powder under the action of high-speed shear force, and stir evenly to prepare a coal tar pitch water slurry. The coal tar pitch water slurry is a fluid liquid fuel, which can be pumped at room temperature, and has a low calorific value of 19.76MJ/Kg.

Embodiment 16

The medium-temperature coal tar pitch fragments with a softening point of 93°C were frozen at -25°C for 24 hours, and after adding 1% OP-10, they were pulverized with a pulverizer, and then sieved with a 320-mesh standard unified sieve to obtain coal tar pitch powder.

Add 0.5 g of dodecyltrimethylammonium bromide into 44.5 g of water and stir to dissolve, then add 55 g of coal tar pitch powder under the action of high-speed shear force, and stir evenly to prepare a coal tar pitch water slurry. The coal tar pitch water slurry is a fluid liquid fuel, which can be pumped at room temperature, and has a low calorific value of 23.15MJ/Kg.

Embodiment 17

The medium-temperature coal tar pitch fragments with a softening point of 90°C were frozen below -20°C for 23 hours, after adding 0.8% sodium dodecylbenzenesulfonate, crushed with a pulverizer, and then sieved with a 240-mesh standard unified sieve to prepare Get coal tar pitch powder.

Add 0.5 g of cetyltrimethylammonium bromide into 49.5 g of water and stir to dissolve, then add 50 g of coal tar pitch powder under the action of high-speed shear force, stir evenly, and prepare coal tar pitch water slurry. The coal tar pitch water slurry is a fluid liquid fuel, which can be pumped at room temperature, and has a low calorific value of 19.77MJ/Kg.

Embodiment 18

Freeze high-temperature coal tar pitch fragments with a softening point of 110°C at 15°C for 22 hours, add 1% OP-10, crush them with a pulverizer, and sieve them with a 280-mesh standard unified sieve to obtain coal tar pitch powder.

Add 1 g of cetyltrimethylammonium chloride to 49 g of water and stir to dissolve, then add 50 g of coal tar pitch powder under the action of high-speed shear force, and stir evenly to prepare a coal tar pitch water slurry. The coal tar pitch water slurry is a fluid liquid fuel, which can be pumped at room temperature, and has a low calorific value of 19.83MJ/Kg.

Embodiment 19

Freeze the medium-temperature coal tar pitch fragments with a softening point of 95°C at 5°C for 25 hours, add 0.7% of JL-C01 quaternary ammonium salt surfactant, crush them with a pulverizer, and sieve with a 280-mesh standard unified sieve. Coal tar pitch powder is produced.

Add 2g of octadecyltrimethylammonium chloride into 38g of water and stir to dissolve, then add 60g of coal tar pitch powder under the action of high-speed shear force, stir evenly, and prepare coal tar pitch water slurry. The coal tar pitch water slurry is a fluid liquid fuel, which can be pumped at room temperature, and has a low calorific value of 24.44MJ/Kg.

Embodiment 20

The medium-temperature coal tar pitch fragments with a softening point of 93°C were frozen below -20°C for 26 hours, added with 0.7% sodium dodecylbenzenesulfonate, crushed with a pulverizer, and sieved with a 240-mesh standard unified sieve to prepare Get coal tar pitch powder.

Add 1 g of octadecyltrimethylammonium bromide to 49 g of water and stir to dissolve, then add 50 g of coal tar pitch powder under the action of high-speed shear force, and stir evenly to prepare a coal tar pitch water slurry. The coal tar pitch water slurry is a fluid liquid fuel, which can be pumped at room temperature, and has a low calorific value of 20.23MJ/Kg.

Embodiment 21

The medium-temperature coal tar pitch fragments with a softening point of 90°C were frozen at -25°C for 21 hours, after adding 1% OP-10, they were pulverized with a pulverizer, and then sieved with a 320-mesh standard unified sieve to obtain coal tar pitch powder.

Add 0.5 g of didecyl dimethyl ammonium chloride to 44.5 g of water and stir to dissolve, then add 55 g of coal tar pitch powder under the action of high-speed shear force, and stir evenly to prepare a coal tar pitch water slurry. The coal tar pitch water slurry is a fluid liquid fuel, which can be pumped at room temperature, and has a low calorific value of 22.45MJ/Kg.

Embodiment 22

Freeze high-temperature coal tar pitch fragments with a softening point of 105°C at -10°C for 23 hours, add 1% sodium dodecylsulfonate, crush them with a pulverizer, and sieve them with a 200-mesh standard unified sieve to obtain Coal tar pitch powder.

Add 1 g of didecyl dimethyl ammonium bromide to 49 g of water and stir to dissolve, then add 50 g of coal tar pitch powder under the action of high-speed shear force, and stir evenly to prepare a coal tar pitch water slurry. The coal tar pitch water slurry is a fluid liquid fuel, which can be pumped at room temperature, and has a low calorific value of 20.14MJ/Kg.

Embodiment 23

Freeze the medium-temperature coal tar pitch fragments with a softening point of 95°C at 5°C for 24 hours, add 0.6% of JL-C01 quaternary ammonium salt surfactant, crush them with a pulverizer, and sieve with a 280-mesh standard unified sieve. Coal tar pitch powder is produced.

Add 2g of didodecyldimethylammonium chloride into 38g of water and stir to dissolve, then add 60g of coal tar pitch powder under the action of high-speed shear force, stir evenly, and prepare coal tar pitch water slurry. The coal tar pitch water slurry is a fluid liquid fuel, which can be pumped at room temperature, and has a low calorific value of 24.57MJ/Kg.

Embodiment 24

Freeze the medium-temperature coal tar pitch fragments with a softening point of 90°C at 15°C for 25 hours, add 0.9% sodium dodecylsulfonate, crush them with a pulverizer, and sieve them with a 240-mesh standard unified sieve to obtain coal asphalt powder.

Add 1g of didodecyldimethylammonium bromide into 49g of water and stir to dissolve, then add 50g of coal tar pitch powder under the action of high-speed shear force, stir evenly, and prepare coal tar pitch water slurry. The coal tar pitch water slurry is a fluid liquid fuel, which can be pumped at room temperature, and has a low calorific value of 19.89MJ/Kg.

Embodiment 25

Freeze high-temperature coal tar pitch fragments with a softening point of 108°C at -25°C for 27 hours, add 0.8% OP-10, crush them with a pulverizer, and sieve them with a 320-mesh standard unified sieve to obtain coal tar pitch powder.

Add 0.5 g of dodecyl dimethyl benzyl ammonium chloride to 44.5 g of water and stir to dissolve, then add 55 g of coal tar pitch powder under the action of high-speed shear force, and stir evenly to prepare a coal tar pitch water slurry. The coal tar pitch water slurry is a fluid liquid fuel, which can be pumped at room temperature, and has a low calorific value of 22.90MJ/Kg.

Embodiment 26

Freeze the medium-temperature coal tar pitch fragments with a softening point of 95°C at -5°C for 28 hours, add 1% JL-C01 quaternary ammonium salt surfactant, crush them with a pulverizer, and sieve them with a 280-mesh standard unified sieve , to produce coal tar pitch powder.

Add 2 g of dodecyl dimethyl benzyl ammonium bromide into 38 g of water and stir to dissolve, then add 60 g of coal tar pitch powder under the action of high-speed shear force, and stir evenly to prepare a coal tar pitch water slurry. The coal tar pitch water slurry is a fluid liquid fuel, which can be pumped at room temperature, and has a low calorific value of 24.77MJ/Kg.

Claims (4)

1. A coal tar pitch water slurry, characterized by a fluid liquid fuel that can be transported by a pump at room temperature, with a low calorific value of 19.63-24.77MJ/Kg, and the composition and mass ratio are: coal tar pitch powder 50%-60%, water 38%-49.5%, dispersant 0.5%-2%, the dispersant is sulfonate type anionic surfactant, betaine type amphoteric surfactant or quaternary ammonium salt type cationic surfactant active agent. 2. The preparation method of a kind of coal tar pitch water slurry according to claim 1, which is characterized in that the coal tar pitch powder prepared by freezing and crushing is added to the dispersant aqueous solution under the action of high-speed shear force, and the coal tar pitch is obtained by stirring evenly water slurry, I. Composition and quality ratio Coal tar pitch powder 50%～60% Water 38%～49.5% Dispersant 0.5%～2% II. Process The medium-temperature coal tar pitch fragments with a softening point of 85-95°C or the high-temperature coal tar pitch fragments with a softening point of 100-110°C are frozen at the embrittlement temperature of -30-15°C for 20-28 hours, and after adding a surfactant, the It is pulverized and sieved to obtain coal tar pitch powder with a particle size of 200-320 mesh; stir and dissolve the dispersant in water, then add the prepared coal tar pitch powder under the action of high-speed shear force, and stir evenly to obtain coal tar pitch water slurry. 3. A method for preparing coal tar pitch water slurry according to claim 2, characterized in that said surfactant is sodium dodecylsulfonate, sodium dodecylbenzenesulfonate, OP-10 or JL-C01 quaternary ammonium salt type surfactant, the mass addition amount is 0.5-1%. 4. The preparation method of a kind of coal tar pitch water slurry according to claim 2, characterized in that the dispersant is selected from sulfonate type anionic surfactant, betaine type amphoteric surfactant or quaternary ammonium salt type cation Surfactant; wherein sulfonate type anionic surfactant refers to sodium dodecylsulfonate, sodium dodecylbenzenesulfonate, sodium dodecylnaphthalenesulfonate, sodium lignosulfonate or petroleum sulfonic acid Sodium; betaine-type amphoteric surfactant refers to dodecyl betaine, dodecyl dimethyl betaine, octadecyl dimethyl betaine, dodecyl dimethyl propyl betaine, Lauryl hydroxypropyl sultaine, lauryl sultaine, lauryl amidopropyl betaine, fatty amidopropyl betaine or cocamidopropyl betaine; cationic surfactant of the quaternary ammonium type The agent refers to dodecyltrimethylammonium chloride, dodecyltrimethylammonium bromide, cetyltrimethylammonium chloride, cetyltrimethylammonium bromide, octadecyl Didecyltrimethylammonium Chloride, Octadecyltrimethylammonium Bromide, Didecyldimethylammonium Chloride, Didecyldimethylammonium Bromide, Didodecyldimethylammonium Bromide ammonium chloride, didodecyldimethylammonium bromide, dodecyldimethylbenzylammonium chloride or dodecyldimethylbenzylammonium bromide.