CN115558530A - Nano hydrocarbon fuel and preparation method thereof - Google Patents
Nano hydrocarbon fuel and preparation method thereof Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
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- 239000012535 impurity Substances 0.000 claims description 29
- 229910052799 carbon Inorganic materials 0.000 claims description 26
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 25
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 25
- 239000000292 calcium oxide Substances 0.000 claims description 25
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- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 claims description 25
- 239000000377 silicon dioxide Substances 0.000 claims description 25
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- 239000000654 additive Substances 0.000 claims description 20
- 230000000996 additive effect Effects 0.000 claims description 20
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 19
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 19
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 19
- 238000003756 stirring Methods 0.000 claims description 15
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 8
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- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical class [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/02—Liquid carbonaceous fuels essentially based on components consisting of carbon, hydrogen, and oxygen only
Abstract
The invention provides a nano hydrocarbon fuel and a preparation method thereof. The nano hydrocarbon fuel provided by the invention comprises water, free gas-phase hydrogen, free liquid-phase hydrogen, solid-phase hydrogen and superfine coal powder, wherein the solid-phase hydrogen is attached to the surface of the superfine coal powder to form hydrogen-attached coal powder; wherein the content of free gas-phase hydrogen is 1600-2500 ppm, the content of free liquid-phase hydrogen is 800-1200 ppm, the weight content of hydrogen in the drying base of the hydrogen-attached coal powder is 1.8-2.0 times of the weight content of hydrogen in the superfine coal powder, the D50 of the hydrogen-attached coal powder is 0.2-0.8 mu m, the D90 is 1.1-5.5 mu m, and the D97 is less than or equal to 15 mu m. The solid calorific value of the nano hydrocarbon fuel provided by the application is more than or equal to 4000 kilocalories/kg, the burnout rate is more than or equal to 99%, the discharge amount of bottom slag, sulfur dioxide and nitrogen oxides is greatly reduced, the activity of silicon-aluminum powder generated by combustion is greatly improved, and the characteristics of raw material resources possessed by coal are fully exploited.
Description
Technical Field
The invention relates to the technical field of nano hydrocarbon fuels, in particular to a nano hydrocarbon fuel and a preparation method thereof.
Background
Coal is a basic energy source and an industrial raw material in China, and provides a favorable guarantee for the economic and social development and the safe and stable supply of national energy sources for a long time. The comprehensive utilization efficiency of coal as a chemical raw material is improved, the high-end, diversified and low-carbon development of the coal chemical industry is promoted, and the realization of clean and efficient utilization of the coal is a necessary way for the refined and high-value development of the coal industry.
In recent years, coal water slurry is concerned internationally as an 'oil-replacing environment-friendly fuel', and the coal water slurry technology has achieved certain achievement through four decades of research since the 80 s of the last century in China, but the defects of low heat value, low combustion efficiency and the like of the traditional coal water slurry are still existed at present.
Therefore, it is an urgent problem to be solved in the art to develop a new and more efficient and clean coal-based special fuel, to fully exploit the raw material resource characteristics of coal and to promote the conversion of coal from "fuel" to "high-value fuel + clean fuel" while maintaining the coal fuel resource characteristics.
Disclosure of Invention
The invention mainly aims to provide a nano hydrocarbon fuel and a preparation method thereof, and aims to solve the problems of low heat value and low combustion efficiency of the traditional coal water slurry.
In order to achieve the above object, according to one aspect of the present invention, there is provided a nano hydrocarbon fuel, comprising water, free gas-phase hydrogen, free liquid-phase hydrogen, solid-phase hydrogen and ultra-fine coal powder, wherein the solid-phase hydrogen is attached to the surface of the ultra-fine coal powder to form hydrogen-attached coal powder, wherein the content of the free gas-phase hydrogen is 1600 to 2500ppm, the content of the free liquid-phase hydrogen is 800 to 1200ppm, the content of hydrogen in the hydrogen-attached coal powder in a dry basis is 1.8 to 2.0 times of the content of hydrogen in the ultra-fine coal powder, the D50 of the hydrogen-attached coal powder is 0.2 to 0.8 μm, the D90 is 1.1 to 5.5 μm, and the D97 is less than or equal to 15 μm, and the ultra-fine coal powder comprises the following components in percentage by weight: 63-70% of carbon, 85-15% of alumina, 45-10% of silicon dioxide, 1.25-2.4% of calcium oxide, 0.5-1.5% of ferric oxide and the balance of water and impurities.
Further, the weight solid content of the nano hydrocarbon fuel is 50-62%; and the apparent viscosity of the nano hydrocarbon fuel is 260-420mPa.s.
Furthermore, in the nano hydrocarbon fuel, the content of free gas phase hydrogen is 1800-2000 ppm, the content of free liquid phase hydrogen is 1000-1200 ppm, and the D50 of the hydrogen-attached coal powder is 0.2-0.6 μm; d90 is 1.1-2.0 μm, D97 is less than or equal to 6 μm, and the superfine coal powder comprises the following components in percentage by weight: 65 to 70 percent of carbon, 8 to 11 percent of alumina, 4 to 7 percent of silicon dioxide, 2.0 to 2.4 percent of calcium oxide, 0.5 to 0.8 percent of ferric oxide, and the balance of water and impurities.
Preferably, the weight solid content of the nano hydrocarbon fuel is 50-60%, and the apparent viscosity of the nano hydrocarbon fuel is 260-320mPa.s.
Further, the content of free gas phase hydrogen is 1600-1800 ppm, the content of free liquid phase hydrogen is 800-1000 ppm, the hydrogen content in the hydrogen-attached coal powder drying base is 1.8-1.9 times of the hydrogen content in the superfine coal powder, the D50 of the hydrogen-attached coal powder is 0.6-0.8 μm, the D90 is 1.8-5.5 μm, the D97 is less than or equal to 15 μm, and the superfine coal powder comprises the following components in percentage by weight: 63-65% of carbon, 13-15% of aluminum oxide, 8-10% of silicon dioxide, 1.2-1.8% of calcium oxide, 1.0-1.5% of ferric oxide and the balance of water and impurities.
Preferably, the weight solid content of the nano hydrocarbon fuel is 60-62%, and the apparent viscosity of the nano hydrocarbon fuel is 360-420mPa.
Furthermore, the burnout rate of the nano hydrocarbon fuel at 800-900 ℃ is more than or equal to 99%.
According to another aspect of the present invention, there is also provided a method for preparing the nano hydrocarbon fuel, the method comprising: and sequentially carrying out nanocrystallization treatment and hydrogen-attached energizing treatment on the modified raw material for preparing the nano hydrocarbon fuel to obtain the nano hydrocarbon fuel.
Furthermore, the modified raw materials for preparing the nano hydrocarbon fuel comprise coal dust particles and water, the median particle size of the coal dust particles is 120-300 meshes, the weight content of the coal dust particles smaller than 300 meshes is less than or equal to 10%, and the 40-mesh passing rate of the coal dust particles is 100%.
Preferably, the median particle size of the coal dust particles is 200-300 meshes, the weight content of the coal dust particles smaller than 500 meshes is less than or equal to 5%, the weight content of the coal dust particles larger than 120 meshes is less than or equal to 10%, and the 60-mesh passing rate of the coal dust particles is 100%; or the median particle size of the coal dust particles is 120-150 meshes, the weight content of the coal dust particles smaller than 300 meshes is less than or equal to 10%, the weight content of the coal dust particles larger than 60 meshes is less than or equal to 10%, and the 40-mesh passing rate of the coal dust particles is 100%.
Further, the preparation method for preparing the nano hydrocarbon fuel comprises the following steps: step S1, carrying out coarse crushing and fine crushing on raw coal in sequence to obtain a finished product raw material with a particle size distribution; s2, mixing the particle size distribution finished product raw material with water for pretreatment and refinement to obtain a modified raw material for preparing the nano hydrocarbon fuel; s3, performing nanocrystallization treatment on the modified raw material for preparing the nano hydrocarbon fuel to obtain nano primary pulp; s4, mixing the additive and the nano primary pulp for activation treatment to obtain activated nano primary pulp; s5, carrying out hydrogen-adding energizing treatment on the activated nano primary pulp to obtain nano hydrocarbon fuel; wherein, in the step S3, the additive comprises lignin, sodium hexametaphosphate and sodium sulfonate, and the addition amount of the sodium hexametaphosphate is 9-13 wt per mill, the addition amount of the lignin is 1.1-1.3 wt per mill and the addition amount of the sulfonate is 0.7-0.9 wt per mill based on the solid dry weight of the nano primary pulp;
further, step S3, based on the dry solid weight of the nano primary pulp, the addition amount of sodium hexametaphosphate is 11wt% to 13wt%, the addition amount of lignin is 1.1 wt% to 1.3 wt%, and the addition amount of sulfonate is 0.7 wt% to 0.9 wt%; or, based on the dry solid weight of the nano primary pulp, the addition amount of the sodium hexametaphosphate is 9-11 wt%, the addition amount of the lignin is 1.4-1.7 wt%, and the addition amount of the sulfonate is 0.7-0.9 wt%.
Further, in the step S3, the additive and the nano raw stock are mixed by stirring.
And further, pre-stirring the nano primary pulp for 5-10 min, adding the additive, and stirring for 20-25 min to obtain the nano activated primary pulp.
Further, the stirring speed is 55 to 65 revolutions per second.
By applying the technical scheme, the nano hydrocarbon fuel provided by the application adopts characteristic components, hydrogen-attached coal powder and free hydrogen in a specific particle size range and water which are matched with each other, the solid heat value of the nano hydrocarbon fuel is not less than 4000 kilocalories/kg, the burnout rate is not less than 99%, the discharge amount of bottom slag, sulfur dioxide and nitrogen oxides is greatly reduced, the activity of silicon-aluminum powder generated by combustion is greatly improved, the raw material resource characteristics of coal are fully explored, the coal is effectively promoted to be converted from 'fuel' to 'high-value fuel + raw material', the high-value utilization of coal is realized, the clean combustion is realized, the traditional coal is boosted to become clean energy, and the industrial significance is great.
In addition, the nano hydrocarbon fuel provided by the application is water-containing fuel, and transportation and storage are all carried out under airtight conditions, so that the occupied area is small, secondary pollution of coal and ash fields is avoided, the working environment is improved, the nano hydrocarbon fuel is very clean before combustion, and is nonflammable, non-explosive, safer and more reliable in the storage and transportation processes.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 shows an SEM image of hydrocarbon nano-fuel at a scale of 200nm provided according to example 1 of the present invention; and
fig. 2 shows an SEM image of hydrocarbon nano fuel provided according to example 1 of the present invention under a scale of 1 μm.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail with reference to examples.
As analyzed by the background technology of the application, the traditional coal water slurry still has the problems of low heat value and low combustion efficiency, and in order to solve the problems, the application provides a nano hydrocarbon fuel and a preparation method thereof.
In a first exemplary embodiment of the present application, the present application provides a nano hydrocarbon fuel, which includes water, free gas-phase hydrogen, free liquid-phase hydrogen, solid-phase hydrogen and superfine coal powder, wherein the solid-phase hydrogen is attached to the surface of the superfine coal powder to form hydrogen-attached coal powder, wherein the content of the free gas-phase hydrogen is 1600-2500 ppm, the content of the free liquid-phase hydrogen is 800-1200 ppm, the hydrogen content in the hydrogen-attached coal powder dry base is 1.8-2 times of the hydrogen content in the superfine coal powder, the D50 of the hydrogen-attached coal powder is 0.2-0.8 μm, the D90 is 1.1-5.5 μm, and the D97 is less than or equal to 15 μm, and the coal powder includes the following superfine components in percentage by weight: 63-70% of carbon, 8-15% of alumina, 4-10% of silicon dioxide, 1.2-2.4% of calcium oxide, 0.5-1.5% of ferric oxide and the balance of water and impurities.
The particle size of the hydrogen-attached coal powder in the nano hydrocarbon fuel is extremely fine, the particle size of a plurality of hydrogen-attached coal powder particles is in the nano-scale or ultra-fine micron size range, and the surface energy of the hydrogen-attached coal powder particles increases exponentially along with the reduction of the particle size. The superfine coal powder has different components, and the prepared nano hydrocarbon fuel has different particle size range, heat value and burnout rate.
The weight content of hydrogen in the hydrogen-attached coal powder drying base refers to the weight content of hydrogen in a solid substance obtained after the hydrogen-attached coal powder is dried.
The rest of the superfine coal powder is water and impurities, wherein the weight content of the impurities is less than or equal to 5 percent.
By applying the technical scheme, the nano hydrocarbon fuel provided by the application adopts characteristic components, hydrogen-attached coal powder and free hydrogen in a specific particle size range and water which are matched with each other, the solid heat value of the nano hydrocarbon fuel is not less than 4000 kilocalories/kg, the burnout rate is not less than 99%, the discharge amount of bottom slag, sulfur dioxide and nitrogen oxides is greatly reduced, the activity of silicon-aluminum powder generated by combustion is greatly improved, the raw material resource characteristics of coal are fully explored, the coal is effectively promoted to be converted from 'fuel' to 'high-value fuel + raw material', the high-value utilization of coal is realized, the clean combustion is realized, the traditional coal is boosted to become clean energy, and the industrial significance is great.
In addition, the nano hydrocarbon fuel provided by the application is water-containing fuel, and transportation and storage are all carried out under airtight conditions, so that the occupied area is small, secondary pollution of coal and ash fields is avoided, the working environment is improved, the nano hydrocarbon fuel is very clean before combustion, and is nonflammable, non-explosive, safer and more reliable in the storage and transportation processes.
In order to further improve the dispersion stability of the hydrogen-attached pulverized coal in water in the nano hydrocarbon fuel provided by the application, the solid content by weight of the nano hydrocarbon fuel is preferably 50-62%, and the apparent viscosity of the nano hydrocarbon fuel is 260-420mPa.s.
In one embodiment of the application, in the hydrocarbon nano fuel, the content of free gas-phase hydrogen is 1800-2000 ppm, the content of free liquid-phase hydrogen is 1000-1200 ppm, the weight content of hydrogen in the hydrogen-attached coal powder drying base is 1.9-2 times of the weight content of hydrogen in the superfine coal powder, and the D50 of the hydrogen-attached coal powder is 0.2-0.6 mu m; d90 is 1.1-2.0 μm, D97 is less than or equal to 6 μm, and the superfine coal powder comprises the following components in percentage by weight: 65-70% of carbon, 8-11% of aluminum oxide, 4-7% of silicon dioxide, 2.0-2.4% of calcium oxide, 0.5-0.8% of ferric oxide and the balance of water and impurities.
The superfine coal powder is obtained by crushing first raw coal, wherein the first raw coal comprises the following components in percentage by weight: 65% -70% of carbon, 8% -11% of aluminum oxide, 4% -7% of silicon dioxide, 2.0% -2.4% of calcium oxide, 0.5% -0.8% of ferric oxide and the balance of water impurities (the weight content of the impurities is less than or equal to 5%), and the hydrogen-attached coal powder has a specific particle size distribution range, so that the nano hydrocarbon fuel provided by the application has higher solid content and more appropriate viscosity, the crushing efficiency and the dispersion stability of the nano hydrocarbon fuel are further improved, and the burnout rate and the activity of the coal ash obtained after combustion are further improved. Particularly, when the weight solid content of the nano hydrocarbon fuel is 50-60% and the apparent viscosity is 260-320mPa.s, the nano hydrocarbon fuel has more excellent dispersion stability and higher heat value.
Typically, but not by way of limitation, in this example, the hydrocarbon nanofuels provided herein have a free gas phase hydrogen content of, for example, 1800ppm, 1850ppm, 1900ppm, 1950ppm, 2000ppm, or any two of the values forming the range; the content of free liquid phase hydrogen is 1000ppm, 1050ppm, 1100ppm, 1150ppm, 1200ppm or any two value ranges; in the superfine coal powder, the weight content of carbon is 65%, 66%, 67%, 68%, 69%, 70% or the range value formed by any two numerical values; the weight content of the alumina is, for example, 8%, 8.5%, 9%, 9.5%, 10%, 10.5%, 11% or a range value formed by any two numerical values; the silica content is, for example, 4%, 4.5%, 5%, 5.5%, 6%, 6.5%, 7%, or any two of these ranges; the content of calcium oxide is, for example, 2.0%, 2.1%, 2.2%, 2.3%, 2.4% or a range value consisting of any two values; the weight content of the ferric oxide is 0.5%, 0.55%, 0.6%, 0.65%, 0.7%, 0.75%, 0.8% or a range value formed by any two values; the weight solid content of the nano hydrocarbon fuel is, for example, 50%, 52%, 55%, 58%, 60% or a range value formed by any two values; the apparent viscosity of the hydrocarbon nano fuel is 260mPa.s, 280mPa.s, 300mPa.s, 320mPa.s or a range of any two values.
In another embodiment of the application, the content of free gas-phase hydrogen in the hydrocarbon nano fuel is 1600-1800 ppm, the content of free liquid-phase hydrogen is 800-1000 ppm, the weight content of hydrogen in the hydrogen-attached coal powder drying base is 1.9-2 times of the weight content of hydrogen in the superfine coal powder, and the D50 of the hydrogen-attached coal powder is 0.6-0.8 μm; d90 is 1.8-5.5 mu m, D97 is less than or equal to 15 mu m, and the superfine coal powder comprises the following components in percentage by weight: 63-65% of carbon, 13-15% of aluminum oxide, 8-10% of silicon dioxide, 1.2-1.8% of calcium oxide, 1.0-1.5% of ferric oxide and the balance of water and impurities.
The superfine coal powder is obtained by crushing second raw coal, wherein the second raw coal comprises the following components in percentage by weight: 63% -65% of carbon, 13% -15% of aluminum oxide, 8% -10% of silicon dioxide, 1.2% -1.8% of calcium oxide, 1.0-1.5% of ferric oxide and the balance of water and impurities (the weight content of the impurities is less than or equal to 1%), and the hydrogen-attached coal powder has a specific particle size distribution range, so that the nano hydrocarbon fuel provided by the application has higher solid content and more appropriate viscosity, the dispersion stability of the nano hydrocarbon fuel is further improved, and the burnout rate of the nano hydrocarbon fuel and the activity of the coal ash obtained after combustion are further improved. Particularly, when the weight solid content of the nano hydrocarbon fuel is 60-62% and the apparent viscosity is 260-320mPa.s, the nano hydrocarbon fuel has more excellent dispersion stability and higher heat value. Particularly, when the weight solid content of the nano hydrocarbon fuel is 60-62% and the apparent viscosity is 260-320mPa.s, the nano hydrocarbon fuel has more excellent dispersion stability and higher heat value.
Typically, but not by way of limitation, in such other embodiments, the present application provides a hydrocarbon nanofuel having a free gas phase hydrogen content of, for example, 1600ppm, 1650ppm, 1700ppm, 1750ppm, 1800ppm, or any two of the ranges; the content of free liquid phase hydrogen is 800ppm, 850ppm, 900ppm, 950ppm, 1000ppm or any two value ranges; in the superfine coal powder, the weight content of carbon is 63%, 63.5%, 64%, 64.5%, 65% or a range value formed by any two numerical values; the weight content of the alumina is 13%, 13.5%, 14%, 14.5%, 15% or a range value formed by any two numerical values; the silica content is, for example, 8%, 8.5%, 9%, 9.5%, 10%, or any two of the values; the content of calcium oxide is 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8% or any two values; the weight content of the ferric oxide is 1.0%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5% or a range value formed by any two numerical values; the weight solid content of the nano hydrocarbon fuel is 60%, 60.5%, 61%, 61.5%, 62% or a range value formed by any two numerical values; the apparent viscosity of the hydrocarbon nano fuel is 260mPa.s, 280mPa.s, 300mPa.s, 320mPa.s or a range of any two values.
In order to further improve the energy utilization rate of the nano hydrocarbon fuel provided by the application, the nano hydrocarbon fuel is preferably fully combusted at a low temperature of 800-900 ℃, the lower burnout rate can be more than or equal to 99%, the energy consumption is further reduced, the low-nitrogen oxide combustion is realized, and the emission and removal costs of sulfur dioxide, nitrogen oxide and smoke dust are greatly reduced.
In addition, the aluminum-silicon powder is generated after the nano hydrocarbon fuel provided by the application is combusted, the activity of the aluminum-silicon powder is high, the acid dissolution rate is high, is 97.55% -98.55%, and is increased by more than 12% compared with the acid dissolution rate of 85% of the traditional fly ash, the transformation, upgrading and development of coal from fuel to high-value fuel and raw material are realized, and the further extension of the circular economy industrial chain is promoted.
The calculation method of the acid dissolution rate comprises the following steps: acid method for dissolving and utilizing SiO 2 The Al in the pre-silicon-aluminum powder component is dissolved out due to the characteristic of difficult dissolution in acid 2 O 3 /SiO 2 ＝MH A/S Al in dissolved-out silico-aluminum powder 2 O 3 /SiO 2 ＝BN A/S The acid dissolution rate can be calculated according to the following formula:
acid dissolution rate = (MH) A/S -BN A/S )/MH A/S ＝1-BN A/S /MH A/S 。
In another exemplary embodiment of the present application, the present application further provides a method for preparing the nano hydrocarbon fuel, which comprises the following steps: and sequentially carrying out nanocrystallization treatment and hydrogen-attached energizing treatment on the modified raw material for preparing the nano hydrocarbon fuel to obtain the nano hydrocarbon fuel.
The preparation method of the nano hydrocarbon fuel provided by the application is simple in process, can be suitable for large-scale production, and can effectively improve the preparation efficiency.
The modified raw material for preparing the nano hydrocarbon fuel is obtained by crushing raw coal, and according to different components and contents in the raw coal, coal powder particles with different particle size distributions are prepared to obtain different types of modified raw materials for preparing the nano hydrocarbon fuel, wherein the modified raw material for preparing the nano hydrocarbon fuel provided by the first embodiment is obtained by crushing first raw coal, and the modified raw material for preparing the nano hydrocarbon fuel provided by the second embodiment is obtained by crushing second raw coal.
The modified raw material for preparing the nano hydrocarbon fuel has different particle sizes according to different raw material components, so that hydrogen-attached particles with different particle size distribution ranges can be prepared.
In order to further improve the preparation efficiency of the nano hydrocarbon fuel provided by the application, the modified raw material for preparing the nano hydrocarbon fuel preferably comprises coal dust particles, the median particle size of the coal dust particles is 120-300 meshes, the weight content of the coal dust particles smaller than 300 meshes is less than or equal to 10%, the weight content of the coal dust particles larger than 60 meshes is less than or equal to 10%, and the 40-mesh passing rate of the coal dust particles is 100%, so that the nano hydrocarbon fuel provided by the application is obtained through subsequent nano crushing and hydrogen-attached energizing treatment.
Typically, but not limitatively, in the modified raw material for preparing the nano hydrocarbon nano fuel, the median particle size of the pulverized coal particles is, for example, 120 mesh, 150 mesh, 180 mesh, 200 mesh, 220 mesh, 250 mesh, 280 mesh, 300 mesh or a range value consisting of any two values, and the weight content of the pulverized coal particles smaller than 300 mesh is, for example, 0%, 0.1%, 0.5%, 0.8%, 1%, 2%, 5%, 8%, 10% or a range value consisting of any two values; the content of the pulverized coal particles larger than 60 meshes is, for example, 0%, 0.1%, 0.5%, 0.8%, 1%, 2%, 5%, 8%, 10% or a range of any two values.
The nano hydrocarbon fuel provided by the first embodiment adopts the coal dust particles for preparing the nano hydrocarbon fuel, wherein the median particle size is 200-300 meshes, the weight content of the coal dust particles smaller than 500 meshes is less than or equal to 5%, the weight content of the coal dust particles larger than 120 meshes is less than or equal to 10%, the 60-mesh passing rate of the coal dust particles is 100%, and then the D50 of the hydrogen-attached coal dust provided by the first embodiment is 0.2-0.6 μm after the subsequent nano pulverization and hydrogen-attached energizing treatment; d90 is 1.1-2.0 μm, D97 is less than or equal to 6 μm.
The nano hydrocarbon fuel provided by the second embodiment adopts coal dust particles for preparing the nano hydrocarbon fuel, the median particle size of the coal dust particles is 120-150 meshes, the weight content of the coal dust particles smaller than 300 meshes is less than or equal to 10%, the weight content of the coal dust particles larger than 60 meshes is less than or equal to 10%, the 40-mesh passing rate of the coal dust particles is 100%, and then the D50 of the hydrogen-attached coal dust provided by the second embodiment is 0.6-0.8 μm after the subsequent nano pulverization and hydrogen-attached energizing treatment; d90 is 1.8-5.5 μm, D97 is less than or equal to 15 μm.
The preparation method of the modified raw material for preparing nano hydrocarbon fuel preferably comprises the following steps: step S1, carrying out coarse crushing and fine crushing on raw coal in sequence to obtain a grain-grade finished product raw material; and S2, mixing the grain-size finished raw material with water, and performing pre-treatment and fine treatment to obtain the modified raw material for preparing the nano hydrocarbon fuel.
The coarse crushing is to crush the raw materials into coarse coal powder with the granularity of less than or equal to 2cm, and the fine crushing is to crush the coarse coal powder into fine coal powder with the granularity of 60-150 meshes. The prepositioning treatment and the refining treatment are to mix the fine coal powder and water and then further grind the mixture to obtain the modified raw material which meets the requirement range of the particle size distribution of the coal powder and is used for preparing the nano hydrocarbon fuel.
In the pre-treatment and fine treatment processes, grinding aids can be properly added according to the needs of the situation to improve the efficiency, and the types of the grinding aids are not limited, and the grinding aids commonly used in the field can be used.
In order to further improve the preparation efficiency of the nano hydrocarbon fuel provided by the present application, it is preferable that the preparation method of the nano hydrocarbon fuel comprises: s3, performing nanocrystallization treatment on the modified raw material for preparing the nano hydrocarbon fuel to obtain nano primary pulp; and S4, mixing the additive and the nano primary pulp, activating to obtain activated nano primary pulp, and S5, adding hydrogen to the activated nano primary pulp, and performing energizing treatment to obtain the nano hydrocarbon fuel.
In the step S3, the modified raw material for preparing the nano hydrocarbon fuel is subjected to nanocrystallization treatment, so that the pulverized coal particles are further refined to obtain the superfine pulverized coal with particle size in micro-nano level, but the smaller the particle size is, the larger the surface area and the surface energy is, the superfine pulverized coal can spontaneously aggregate to reduce the specific surface area, and the superfine pulverized coal exists in suspension in the nano primary pulp, so that the gravity action needs to be overcome, otherwise, the superfine pulverized coal can precipitate or stratify. In order to further improve the dispersion uniformity of the superfine coal powder in the coal slurry and reduce the occurrence of the phenomenon of agglomeration and precipitation of the superfine coal powder, it is preferable that in step S4, an additive is added to the nano primary slurry to further improve the dispersion stability of the superfine coal powder in water.
The additive comprises lignin, sodium hexametaphosphate and sulfonate, wherein the addition amount of the sodium hexametaphosphate is 9-13 wt per mill, the addition amount of the lignin is 1.1-1.7 wt per mill and the addition amount of the sulfonate is 0.7-0.9 per mill based on the dry solid weight of the nano primary pulp.
The above sulfonate is not limited in kind and includes, but is not limited to, potassium sulfonate, sodium sulfonate, etc.
In the step S5, the hydrogen-attaching enabling process is the same as the hydrogen-attaching enabling operation commonly used in the art, and is not described herein again.
Typically, but not limitatively, in step S4, the addition amount of sodium hexametaphosphate is, for example, 9 wt%, 10 wt%, 11wt%, 12 wt%, 13wt% or any two values of the ranges based on the dry solid weight of the nano raw pulp; the addition amount of lignin is 1.1 wt%, 1.2 wt%, 1.3 wt%, 1.4 wt%, 1.5 wt%, 1.6 wt%, 1.7 wt% or any two value ranges; the addition amount of the sulfonate is 0.7 wt%, 0.75 wt%, 0.8 wt%, 0.85 wt%, 0.9 wt%, or any two values.
In order to further improve the dispersion stability of the nano hydrocarbon fuel provided in the first embodiment, it is preferable that, in the process of preparing the nano hydrocarbon fuel provided in the first embodiment, based on the dry solid weight of the nano primary pulp, the addition amount of sodium hexametaphosphate is 11wt% to 13wt%, the addition amount of lignin is 1.1 wt% to 1.3 wt%, and the addition amount of sulfonate is 0.7 wt% to 0.9 wt%.
In order to further improve the dispersion stability of the nano hydrocarbon fuel provided by the second embodiment, it is preferable that, in the process of preparing the nano hydrocarbon fuel provided by the second embodiment, the addition amount of the sodium hexametaphosphate is 9 wt% to 11wt%, the addition amount of the lignin is 1.4 wt% to 1.7 wt% and the addition amount of the sulfonate is 0.7 wt% to 0.9 wt% based on the dry solid weight of the nano primary pulp.
In the step S3, the mixing manner of the additive and the nano primary pulp is not limited, and includes, but is not limited to, stirring, and the like. In order to further improve the mixing efficiency of the additive and the nano primary pulp, the nano primary pulp is preferably pre-stirred for 5-10 min, then the additive is added for mixing, and then the nano activated primary pulp is obtained after stirring for 20-25 min.
In order to further improve the stirring efficiency, the stirring speed is preferably 55 to 65 rpm, and the power of the stirrer to be used is preferably 5kW.
The advantageous effects of the present application will be further described below with reference to examples and comparative examples.
Example 1
The embodiment provides a nano hydrocarbon fuel, which comprises water, free gas-phase hydrogen, free liquid-phase hydrogen, solid-phase hydrogen and superfine coal powder, wherein the solid-phase hydrogen is attached to the surface of the superfine coal powder to form hydrogen-attached coal powder, the solid-phase hydrogen content of the nano hydrocarbon fuel is 55%, the free gas-phase hydrogen content is 2000ppm, the free liquid-phase hydrogen content is 1000ppm, the hydrogen weight content of the hydrogen-attached coal powder is 2.0 times of the hydrogen weight content of the superfine coal powder, the hydrogen-attached coal powder has a D50=450nm, a D90=1.5 μm and a D97=5 μm, and the superfine coal powder comprises the following components in percentage by weight: 67% of carbon, 10% of aluminum oxide, 5.2% of silicon dioxide, 2.2% of calcium oxide, 0.7% of ferric oxide, and the balance of water and impurities (the weight content of the impurities is less than or equal to 5%).
The nano hydrocarbon fuel is prepared by the following steps:
(1) The method comprises the following steps of carrying out coarse crushing on first raw coal to obtain coarse coal powder with the granularity of less than or equal to 2cm, carrying out fine crushing on the coarse coal powder to obtain a granularity grade finished product raw material with the granularity of 60-150 meshes, wherein the first raw coal comprises the following components in percentage by mass: 67% of carbon, 10% of aluminum oxide, 5.2% of silicon dioxide, 2.2% of calcium oxide, 0.7% of ferric oxide and the balance of impurities;
(2) Mixing the grain-size finished raw material with water, and performing pre-treatment and fine treatment to obtain the modified raw material for preparing the nano hydrocarbon fuel, wherein the median grain size of coal dust particles in the modified raw material for preparing the nano hydrocarbon fuel is 250 meshes, the weight content of the coal dust particles smaller than 500 meshes is 4%, the weight content of the coal dust particles larger than 120 meshes is 8%, and the 60-mesh passing rate is 100%.
(3) Performing nanocrystallization crushing treatment on a modified raw material for preparing the nano hydrocarbon fuel to obtain nano primary pulp, wherein coal dust particles D50=450nm, D90=1.5 μm and D97=5 μm in the nano primary pulp;
(4) Firstly stirring the nano primary pulp for 8 minutes at the speed of 60 revolutions per second by a stirrer of 5kW, then adding an additive, and then stirring for 22 minutes at the speed of 60 revolutions per second to obtain the activated nano primary pulp, wherein the additive consists of lignin, six sodium phosphates and sodium sulfonate, and the addition amount of the sodium hexametaphosphate is 12wt per thousand, the addition amount of the lignin is 1.25wt per thousand and the addition amount of the sodium sulfonate is 0.8wt per thousand based on the dry solid weight of the nano primary pulp.
(5) And (3) carrying out hydrogen-adding energizing treatment on the nano primary pulp to obtain the nano hydrocarbon fuel.
Example 2
This example provides a nano-hydrocarbon fuel which differs from example 1 in that the solids content is 50% by weight.
Example 3
This example provides a nano-hydrocarbon fuel which differs from example 1 in that the solids content is 60% by weight.
Example 4
This example provides a nano hydrocarbon fuel, which is different from example 1 in that the content of free gas phase hydrogen is 1800ppm and the content of free liquid phase hydrogen is 1200ppm.
Example 5
The embodiment provides a nano hydrocarbon fuel, which is different from the embodiment 1 in that the hydrogen weight content in the hydrogen-attached coal powder drying base is 1.9 times of the hydrogen weight content in the superfine coal powder.
Example 6
The present embodiment provides a nano hydrocarbon fuel, which is different from embodiment 1 in that the hydrogen-added pulverized coal has D50=0.2 μm, D90=1.1 μm, and D97=4 μm.
Example 7
The present embodiment provides a nano hydrocarbon fuel, which is different from embodiment 1 in that the hydrogen-added pulverized coal has D50=0.6 μm, D90=2.0 μm, and D97=6 μm.
Example 8
The embodiment provides a nano hydrocarbon fuel, which is different from the embodiment 1 in that the superfine pulverized coal comprises the following components in percentage by weight: 65% of carbon, 11% of aluminum oxide, 4% of silicon dioxide, 2.4% of calcium oxide, 0.5% of ferric oxide and the balance of impurities.
Example 9
The embodiment provides a nano hydrocarbon fuel, which is different from the embodiment 1 in that the ultrafine coal powder comprises the following components in percentage by weight: 70% of carbon, 8% of aluminum oxide, 7% of silicon dioxide, 2.0% of calcium oxide, 0.8% of ferric oxide and the balance of impurities.
Example 10
The embodiment provides a nano hydrocarbon fuel, which is different from the embodiment 1 in that in the step (4), based on the dry weight of the nano primary pulp, the addition amount of sodium hexametaphosphate is 11wt%, the addition amount of lignin is 1.3 wt% o, and the addition amount of sodium sulfonate is 0.9 wt% o.
Example 11
The embodiment provides a nano hydrocarbon fuel, which is different from the embodiment 1 in that in the step (4), on the basis of the dry weight of the nano primary pulp, the addition amount of sodium hexametaphosphate is 13wt%, the addition amount of lignin is 1.2 wt%, and the addition amount of sodium sulfonate is 0.8 wt%.
Comparative example 1
The comparative example provides a coal water slurry, which comprises water and superfine coal powder, wherein the components and the content of the superfine coal powder are the same as those in example 1, and D50=50 μm, and D75=75 μm.
Comparative example 2
The comparative example provides a nano hydrocarbon fuel, which is different from the nano hydrocarbon fuel in the example 1 in that the content of free gas-phase hydrogen is 1000ppm, the content of free liquid-phase hydrogen is 600ppm, and the weight content of hydrogen in the hydrogen-attached coal powder drying base is 1.5 times of the weight content of hydrogen in the superfine coal powder.
Comparative example 3
The comparative example provides a nano hydrocarbon fuel, which is different from the embodiment 1 in that the superfine coal powder comprises the following components in percentage by weight: 72% of carbon, 6% of aluminum oxide, 3.5% of silicon dioxide, 1.5% of calcium oxide, 1% of ferric oxide and the balance of impurities.
Comparative example 4
The comparative example provides a nano hydrocarbon fuel, which is different from the nano hydrocarbon fuel in example 1 in that the superfine coal powder comprises the following components in percentage by weight: 61% of carbon, 12% of aluminum oxide, 5% of silicon dioxide, 1.5% of calcium oxide, 1% of ferric oxide and the balance of impurities.
The preparation methods of the above examples 2 to 11 and comparative examples 1 to 4 are the same as example 1, and the adaptability adjustment is performed according to the difference of the components of the ultrafine coal powder, the particle size distribution of the hydrogen-attached coal powder or the amount of the additive.
Test example 1
After being dried, the nano hydrocarbon fuel provided by the above example 1 is observed by a Scanning Electron Microscope (SEM) under scales of 200nm and 1 μm respectively, and the results are shown in FIG. 1 and FIG. 2.
Test example 2
The solid calorific value, burnout rate, apparent viscosity, dispersion stability, and acid dissolution rate of the silicon aluminum powder obtained after combustion were respectively tested on the coal-based fuels provided in the above examples and comparative examples, and the results are shown in table 1 below.
Wherein, (1) the burn-out rate test method comprises the following steps: drying the coal-based fuel, weighing, and recording the weight of the coal-based fuel dry basis as M 1 Mixing coalFully burning the base fuel at 850 ℃, collecting the silicon-aluminum powder obtained after burning, weighing and recording as M 2 Burnout rate = (M) 1 -M 2 )/M 1 。
(2) The method for testing the dispersion stability comprises the following steps: reference GBT18856.5-2008 coal-water slurry test method part five: and (3) stability testing, namely testing the static stability of the nano hydrocarbon fuel after the nano hydrocarbon fuel is stood for 10 days. The method comprises the following specific steps: placing 1000mL of nano hydrocarbon fuel sample in a container, standing for 10 days under specified conditions, firstly inclining the container to enable the nano hydrocarbon fuel to freely flow out, then vertically inverting the container for 8min, weighing the mass of residues in the container, and representing the static stability of the nano hydrocarbon fuel by the mass fraction of the residues of the nano hydrocarbon fuel in the nano hydrocarbon fuel sample.
(3) The apparent viscosity was measured as follows: using a German Hakk VT550 rotary viscometer at a shear rate of 100s -1 The measurements were performed and 10 samples per group were tested and averaged.
TABLE 1
Example 12
The embodiment provides a nano hydrocarbon fuel, which comprises water, free gas-phase hydrogen, free liquid-phase hydrogen, solid-phase hydrogen and superfine coal powder, wherein the solid-phase hydrogen is attached to the surface of the superfine coal powder to form hydrogen-attached coal powder, the weight content of the solid in the nano hydrocarbon fuel is 61.5%, the content of the free gas-phase hydrogen is 1800ppm, the content of the free liquid-phase hydrogen is 800ppm, the weight content of the hydrogen in a hydrogen-attached coal powder dry base is 1.85 times of the weight content of the hydrogen in the superfine coal powder, the hydrogen-attached coal powder has a D50=650nm, a D90=3.5 μm and a D97=11 μm, and the superfine coal powder comprises the following components in percentage by weight: 64% of carbon, 14% of aluminum oxide, 9% of silicon dioxide, 1.6% of calcium oxide, 1.3% of ferric oxide and the balance of water and impurities (the weight content of the impurities is less than or equal to 1%).
The nano hydrocarbon fuel is prepared by the following steps:
(1) The method comprises the following steps of carrying out coarse crushing on first raw coal to obtain coarse coal powder with the granularity of less than or equal to 2cm, carrying out fine crushing on the coarse coal powder to obtain a granularity grade finished product raw material with the granularity of 60-150 meshes, wherein the first raw coal comprises the following components in percentage by mass: 64% of carbon, 14% of aluminum oxide, 9% of silicon dioxide, 1.6% of calcium oxide, 1.3% of ferric oxide and the balance of impurities;
(2) Mixing the grain-size finished raw material with water, and performing pre-treatment and fine treatment to obtain the modified raw material for preparing the nano hydrocarbon fuel, wherein the median grain size of coal dust particles in the modified raw material for preparing the nano hydrocarbon fuel is 130 meshes, the weight content of the coal dust particles smaller than 300 meshes is 6%, the weight content of the coal dust particles larger than 60 meshes is 7%, and the 40-mesh passing rate is 100%.
(3) Performing nanocrystallization crushing treatment on a modified raw material for preparing the nano hydrocarbon fuel to obtain nano primary pulp, wherein coal powder particles D50=650nm, D90=3.5 μm and D97=11 μm in the nano primary pulp;
(4) Firstly, stirring the nano primary pulp for 8 minutes at the speed of 60 revolutions per second by using a 5kW stirrer, then adding an additive, and then stirring for 22 minutes at the speed of 60 revolutions per second to obtain activated nano primary pulp, wherein the additive consists of lignin, six sodium phosphates and sodium sulfonate, and the addition amount of the sodium hexametaphosphate is 10wt per thousand, the addition amount of the lignin is 1.5wt per thousand and the addition amount of the sodium sulfonate is 0.8wt per thousand on the basis of the dry solid weight of the nano primary pulp.
(5) And (3) carrying out hydrogen-adding energizing treatment on the nano primary pulp to obtain the nano hydrocarbon fuel.
Example 13
This example provides a nano-hydrocarbon fuel which differs from example 12 in that the solids content is 62% by weight.
Example 14
This example provides a nano-hydrocarbon fuel, which differs from example 12 in that the free gas phase hydrogen content is 1600ppm and the free liquid phase hydrogen content is 1000ppm.
Example 15
The present embodiment provides a nano hydrocarbon fuel, which is different from embodiment 12 in that the hydrogen content in the hydrogen-attached pulverized coal dry base is 1.8 times of the hydrogen content in the ultrafine pulverized coal.
Example 16
The present embodiment provides a nano hydrocarbon fuel, which is different from embodiment 12 in that the pulverized hydrogen-added coal has D50=0.8 μm, D90=5.5 μm, and D97=15 μm.
Example 17
The embodiment provides a nano hydrocarbon fuel, which is different from the embodiment 12 in that the ultrafine coal powder comprises the following components in percentage by weight: 63% of carbon, 15% of aluminum oxide, 8% of silicon dioxide, 1.8% of calcium oxide, 1.0% of ferric oxide and the balance of impurities.
Example 18
The embodiment provides a nano hydrocarbon fuel, which is different from the embodiment 12 in that the ultrafine coal powder comprises the following components in percentage by weight: 65% of carbon, 13% of aluminum oxide, 10% of silicon dioxide, 1.2% of calcium oxide, 1.5% of ferric oxide and the balance of impurities.
Example 19
The embodiment provides a nano hydrocarbon fuel, which is different from the embodiment 12 in that in the step (4), the addition amount of sodium hexametaphosphate, the addition amount of lignin and the addition amount of sodium sulfonate are 9 wt% and 1.4 wt% respectively, based on the dry weight of the nano primary pulp.
Example 20
The embodiment provides a nano hydrocarbon fuel, which is different from the embodiment 12 in that in the step (4), the addition amount of sodium hexametaphosphate, the addition amount of lignin and the addition amount of sodium sulfonate are respectively 11wt% and 1.7 wt% and 0.7 wt% based on the dry weight of the nano primary pulp.
Comparative example 5
The comparative example provides a coal water slurry comprising water and ultra fine coal dust, wherein the ultra fine coal dust has the same composition and content as in example 12, and D50=50 μm, and D75=75 μm.
Comparative example 6
The comparative example provides a nano hydrocarbon fuel, which is different from the nano hydrocarbon fuel in example 12 in that the content of free gas phase hydrogen is 1000ppm, the content of free liquid phase hydrogen is 600ppm, and the content of hydrogen in the hydrogen-attached coal powder dry base is 1.5 times of the content of hydrogen in the superfine coal powder.
Comparative example 7
The comparative example provides a nano hydrocarbon fuel, which is different from the nano hydrocarbon fuel in example 12 in that the superfine pulverized coal comprises the following components in percentage by weight: 71% of carbon, 7% of aluminum oxide, 3.5% of silicon dioxide, 1.5% of calcium oxide, 1% of ferric oxide and the balance of impurities.
Comparative example 8
The comparative example provides a nano hydrocarbon fuel, which is different from the nano hydrocarbon fuel in example 12 in that the superfine coal powder comprises the following components in percentage by weight: 60% of carbon, 13% of aluminum oxide, 5% of silicon dioxide, 1.5% of calcium oxide, 1% of ferric oxide and the balance of impurities.
The preparation methods of the above examples 12 to 20 and comparative examples 5 to 8 are the same as example 12, and the adaptability adjustment is performed according to the difference of the components of the ultrafine coal powder, the particle size distribution of the hydrogen-attached coal powder or the amount of the additive.
Test example 3
The coal-based fuels provided in examples 2 to 20 and comparative examples 5 to 8 were tested for calorific value of solid, burnout rate, apparent viscosity, and dispersion stability, respectively, and the results are shown in table 2 below, and the test methods are the same as those in test example 2 and will not be described again.
TABLE 2
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:
the nano hydrocarbon fuel provided by the application adopts characteristic components and hydrogen-attached coal powder with a specific particle size range, free hydrogen and water which are matched with each other, the solid calorific value of the nano hydrocarbon fuel is not less than 4000cal/kg, the burnout rate is not less than 99%, the dispersion stability is greatly improved, the raw material resource characteristics of coal are fully explored, the coal is effectively promoted to be converted from fuel to high-value fuel and raw material, the high-value utilization and clean combustion of the coal are realized, the traditional coal is boosted to become clean energy, and the industrial significance is great.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The nano hydrocarbon fuel is characterized by comprising water, free gas-phase hydrogen, free liquid-phase hydrogen, solid-phase hydrogen and superfine coal powder, wherein the solid-phase hydrogen is attached to the surface of the superfine coal powder to form hydrogen-attached coal powder;
wherein the content of free gas-phase hydrogen is 1600-2500 ppm, the content of free liquid-phase hydrogen is 800-1200 ppm, the hydrogen weight content in the hydrogen-attached coal powder drying base is 1.8-2.0 times of the hydrogen weight content in the superfine coal powder, the D50 of the hydrogen-attached coal powder is 0.2-0.8 mu m, the D90 is 1.1-5.5 mu m, and the D97 is less than or equal to 15 mu m, and the superfine coal powder comprises the following components in percentage by weight: 63-70% of carbon, 8-15% of alumina, 4-10% of silicon dioxide, 1.2-2.4% of calcium oxide, 0.5-1.5% of ferric oxide and the balance of water and impurities.
2. The nano hydrocarbon fuel according to claim 1, wherein the nano hydrocarbon fuel has a weight solid content of 50% to 62%, and an apparent viscosity of 260 to 420mpa.s.
3. The nano hydrocarbon fuel according to claim 1, wherein the content of free gas phase hydrogen is 1800-2000 ppm, the content of free liquid phase hydrogen is 1000-1200 ppm, the hydrogen weight content in the hydrogen-attached coal powder dry base is 1.9-2.0 times of the hydrogen weight content in the superfine coal powder, the D50 of the hydrogen-attached coal powder is 0.2-0.6 μm, the D90 is 1.1-2.0 μm, the D97 is less than or equal to 6 μm, and the superfine coal powder comprises the following components in percentage by weight: 65-70% of carbon, 8-11% of alumina, 4-7% of silicon dioxide, 2.0-2.4% of calcium oxide, 0.5-0.8% of ferric oxide and the balance of water and impurities;
preferably, the weight solid content of the nano hydrocarbon fuel is 50-60%, and the apparent viscosity of the nano hydrocarbon fuel is 260-320mPa.s.
4. The nano hydrocarbon fuel according to claim 1, wherein the content of free gas phase hydrogen is 1600-1800 ppm, the content of free liquid phase hydrogen is 800-1000 ppm, the hydrogen weight content in the hydrogen-attached pulverized coal dry base is 1.8-1.9 times of the hydrogen weight content in the superfine pulverized coal, the D50 of the hydrogen-attached pulverized coal is 0.6-0.8 μm, the D90 is 1.8-5.5 μm, the D97 is less than or equal to 15 μm, and the superfine pulverized coal comprises the following components in percentage by weight: 63-65% of carbon, 13-15% of alumina, 8-10% of silicon dioxide, 1.2-1.8% of calcium oxide, 1.0-1.5% of ferric oxide and the balance of water and impurities;
preferably, the weight solid content of the nano hydrocarbon fuel is 60-62%, and the apparent viscosity of the nano hydrocarbon fuel is 360-420mPa.s.
5. The nano-hydrocarbon fuel according to any one of claims 1 to 4, wherein the burnout rate of the nano-hydrocarbon fuel at 800-900 ℃ is not less than 99%.
6. The method for producing a nano hydrocarbon fuel according to any one of claims 1 to 5, comprising: and sequentially carrying out nanocrystallization treatment and hydrogen-attached energizing treatment on the modified raw material for preparing the nano hydrocarbon fuel to obtain the nano hydrocarbon fuel.
7. The preparation method of claim 6, wherein the modified raw material for preparing the nano hydrocarbon fuel comprises coal dust particles and water, the median particle size of the coal dust particles is 120-300 meshes, the weight content of the coal dust particles smaller than 300 meshes is less than or equal to 10%, the weight content of the coal dust particles larger than 60 meshes is less than or equal to 10%, and the 40-mesh passing rate of the coal dust particles is 100%;
preferably, the median particle size of the pulverized coal particles is 200-300 meshes, the weight content of the pulverized coal particles smaller than 500 meshes is less than or equal to 5%, the weight content of the pulverized coal particles larger than 120 meshes is less than or equal to 10%, and the 60-mesh passing rate of the pulverized coal particles is 100%; or the median particle size of the coal dust particles is 120-150 meshes, the weight content of the coal dust particles smaller than 300 meshes is less than or equal to 10%, the weight content of the coal dust particles larger than 60 meshes is less than or equal to 10%, and the 40-mesh passing rate of the coal dust particles is 100%.
8. The method of manufacturing according to claim 6, comprising:
step S1, carrying out coarse crushing and fine crushing on raw coal in sequence to obtain a finished product raw material with a particle size distribution;
s2, mixing the particle size distribution finished product raw material with water for pretreatment and fine treatment to obtain the modified raw material for preparing the nano hydrocarbon fuel;
s3, performing nanocrystallization treatment on the modified raw material for preparing the nano hydrocarbon fuel to obtain nano primary pulp;
s4, mixing an additive with the nano primary pulp to perform activation treatment to obtain activated nano primary pulp;
step S5, performing hydrogen-adding energizing treatment on the activated nano primary pulp to obtain the nano hydrocarbon fuel;
in the step S3, the additive includes lignin, sodium hexametaphosphate and sodium sulfonate, and the addition amount of the sodium hexametaphosphate is 9 wt% to 13wt%, the addition amount of the lignin is 1.1 wt% to 1.7 wt% and the addition amount of the sulfonate is 0.7 wt% to 0.9 wt% based on the dry solid weight of the nano raw stock.
9. The preparation method according to claim 8, wherein in the step S3, based on the dry solid weight of the nano raw pulp, the addition amount of the sodium hexametaphosphate is 11wt% to 13wt%, the addition amount of the lignin is 1.1 wt% to 1.3 wt%, and the addition amount of the sulfonate is 0.7 wt% to 0.9 wt%;
or, based on the dry solid weight of the nano primary pulp, the addition amount of the sodium hexametaphosphate is 9-11 wt%, the addition amount of the lignin is 1.4-1.7 wt%, and the addition amount of the sulfonate is 0.7-0.9 wt%.
10. The preparation method of claim 9, wherein in the step S3, the additive is mixed with the nano raw stock by stirring;
preferably, the nano primary pulp is pre-stirred for 5-10 min, then the additive is added, and then the nano activated primary pulp is obtained after stirring for 20-25 min;
preferably, the stirring speed is 55 to 65 revolutions per second.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116178091A (en) * | 2023-03-06 | 2023-05-30 | 神华准格尔能源有限责任公司 | Nano hydrocarbon ammonium nitrate fuel oil explosive and application thereof in hard rock burst field |
| CN116199553A (en) * | 2023-03-06 | 2023-06-02 | 神华准格尔能源有限责任公司 | Nano hydrocarbon ammonium nitrate fuel oil explosive and application thereof in field of throwing blasting |
| CN116375546A (en) * | 2023-03-06 | 2023-07-04 | 神华准格尔能源有限责任公司 | Coal-based nano hydrocarbon additive for ammonium nitrate fuel oil explosive, preparation method and application thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4047898A (en) * | 1975-06-03 | 1977-09-13 | Texaco Inc. | Upgrading of solid fuels |
| GB1527222A (en) * | 1975-06-03 | 1978-10-04 | Texaco Development Corp | Upgrading of solid fuels |
| CN1752192A (en) * | 2005-08-09 | 2006-03-29 | 华南理工大学 | Environment protection and quality increasing process for coal and water-coal fluid |
| CN105255512A (en) * | 2015-09-30 | 2016-01-20 | 北京中科诚毅科技发展有限公司 | Method for matching and selecting raw materials of coal and oil mixed-refining process |
| CN105713656A (en) * | 2014-12-01 | 2016-06-29 | 中国石油天然气股份有限公司 | Micro bubble generator internal hydrogen dissolving reactor, and application method thereof |
-
2022
- 2022-09-23 CN CN202211167040.6A patent/CN115558530B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4047898A (en) * | 1975-06-03 | 1977-09-13 | Texaco Inc. | Upgrading of solid fuels |
| GB1527222A (en) * | 1975-06-03 | 1978-10-04 | Texaco Development Corp | Upgrading of solid fuels |
| CN1752192A (en) * | 2005-08-09 | 2006-03-29 | 华南理工大学 | Environment protection and quality increasing process for coal and water-coal fluid |
| CN105713656A (en) * | 2014-12-01 | 2016-06-29 | 中国石油天然气股份有限公司 | Micro bubble generator internal hydrogen dissolving reactor, and application method thereof |
| CN105255512A (en) * | 2015-09-30 | 2016-01-20 | 北京中科诚毅科技发展有限公司 | Method for matching and selecting raw materials of coal and oil mixed-refining process |
Non-Patent Citations (3)
| Title |
|---|
| 向立明等: "柴油机燃用油焦浆试验", 《农业机械学报》, vol. 42, no. 7, pages 5 - 15 * |
| 姜秀民等: "超细煤粉 NOx 和 SO2 排放特性与燃烧特性", 《化工学报》, vol. 55, no. 5, pages 783 - 787 * |
| 罗玮等: "燃料重整制氢及其应用方式的比较", 《内燃机与动力装置》, no. 6, pages 11 - 20 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116178091A (en) * | 2023-03-06 | 2023-05-30 | 神华准格尔能源有限责任公司 | Nano hydrocarbon ammonium nitrate fuel oil explosive and application thereof in hard rock burst field |
| CN116199553A (en) * | 2023-03-06 | 2023-06-02 | 神华准格尔能源有限责任公司 | Nano hydrocarbon ammonium nitrate fuel oil explosive and application thereof in field of throwing blasting |
| CN116375546A (en) * | 2023-03-06 | 2023-07-04 | 神华准格尔能源有限责任公司 | Coal-based nano hydrocarbon additive for ammonium nitrate fuel oil explosive, preparation method and application thereof |
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