CN113845949B - Coal-based nano hydrocarbon fuel preparation and dosing system and method - Google Patents
Coal-based nano hydrocarbon fuel preparation and dosing system and method Download PDFInfo
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- CN113845949B CN113845949B CN202111256224.5A CN202111256224A CN113845949B CN 113845949 B CN113845949 B CN 113845949B CN 202111256224 A CN202111256224 A CN 202111256224A CN 113845949 B CN113845949 B CN 113845949B
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- 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
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Abstract
The invention discloses a nano hydrocarbon fuel preparation dosing system and a method thereof, wherein the nano hydrocarbon fuel preparation dosing system comprises the following steps: at least one additive dispensing device; the mixing device is used for receiving and mixing the additives from the additive dispensing devices; the additive homogenizing device is used for homogenizing and mixing various additives from the mixing device; the pre-distribution tank is used for receiving the homogenized additive and pulverized coal and softened water required by the preparation of the externally provided nano hydrocarbon fuel, and mixing the pulverized coal and the softened water; the nano processor is used for receiving the mixed material from the preposed material preparing groove, and performing nano processing treatment to prepare nano hydrocarbon fuel; the cooling tank is used for receiving and cooling the prepared nano hydrocarbon fuel; and a dispersant dispensing device and a dispersant homogenizing device. The invention provides a dosing system suitable for preparing different types and different purposes of additives in the process of preparing nano hydrocarbon fuel, which can accurately control various types of additives and realize continuous and stable production process.
Description
Technical Field
The invention relates to the technical field of coal-based fluid fuels, in particular to a dosing system and a dosing method for a preparation process of a coal-based nano hydrocarbon fuel.
Background
The coal-based nano hydrocarbon fuel is a novel, efficient and clean environment-friendly fuel, and has the characteristics of high combustion efficiency, low pollutant emission and the like.
The existing coal water slurry additive dosing device mixes the prepared additives of all components in a slurry mixing tank according to a certain proportion, directly mixes the additives with raw materials and then enters the next production procedure, and the continuous dosing process with reasonable proportion in a plurality of production procedures cannot be realized.
The reasonable addition of the additive is a key step in the preparation process of the coal-based nano hydrocarbon fuel, the physical and chemical properties and the subsequent storage, transportation and atomization properties of the coal-based nano hydrocarbon fuel are directly influenced, and the performance of the properties of the coal-based nano hydrocarbon fuel is influenced when the conventional dosing device is used.
Disclosure of Invention
In order to make up for the defects in the prior art, the invention provides a system and a method for preparing and feeding coal-based nano hydrocarbon fuel.
In order to achieve the above object, the present invention adopts the following technical solutions:
the invention provides a first aspect of a coal-based nano hydrocarbon fuel preparation and dosing system, which comprises:
at least one additive dispensing device;
the mixing device is respectively communicated with each additive dispensing device and is used for receiving and mixing the additives from each additive dispensing device;
the additive homogenizing device is communicated with the mixing device and is used for homogenizing and mixing various additives from the mixing device;
the pre-distribution trough is used for receiving the homogenized additive and pulverized coal and softened water required by the preparation of the externally provided coal-based nano hydrocarbon fuel, and mixing the pulverized coal and the softened water;
the nano processor is used for receiving the mixed material from the front distribution tank, performing nano processing and preparing the coal-based nano hydrocarbon fuel;
the cooling tank is used for receiving and cooling the prepared coal-based nano hydrocarbon fuel;
a dispersant dispensing device for providing a dispersant;
the dispersant homogenizing device is used for receiving the cooled coal-based nano hydrocarbon fuel and the dispersant ， And mixing to obtain the coal-based nano hydrocarbon fuel finished product.
According to the system, the additive dispensing device comprises a defoaming agent dispensing device, a grinding aid dispensing device and a wetting agent dispensing device, and additives with corresponding concentrations are dispensed according to needs. Preferably, the dispensing device can select a dosing tank with a stirrer, and the rotation speed is preferably 400-500r/min.
Furthermore, when the additive is liquid, the stirrer adopts a straight blade type stirring paddle, so that the uniformity of the components of the medicament can be ensured, the structure is simple, and the cost is low.
Further, the additive dosing device is provided with a feed pump, preferably a metering pump, connected thereto. The addition amount of different additives can be accurately controlled through the metering pumps corresponding to the additives. Wherein, the addition proportion of the three additives is wetting agent: defoaming agent: the grinding aid =1-2, and preferably 1.
The coal powder belongs to a substance with strong hydrophobicity, the combination degree of the coal powder and water determines the processing difficulty and the subsequent slurry forming performance of the coal-based nano hydrocarbon fuel, and the wetting agent enables water to spread on the surfaces of coal powder particles or penetrate into the surfaces of the coal powder particles by reducing the surface tension or the interfacial tension of the coal powder, so that the coal powder particles are more easily soaked by water.
During the nano processing of the coal powder, the particles are gradually thinned, the specific surface area is increased, the surface of the coal powder is charged due to bond breakage, the particles are mutually adsorbed and agglomerated, and the crushing efficiency is reduced. And a small amount of grinding aid is added, so that particle agglomeration can be prevented, the material fluidity is improved, the grinding efficiency is improved, and the production time of the coal-based nano hydrocarbon fuel is shortened.
Meanwhile, due to the use of the wetting agent and the grinding aid, a large amount of foam is generated in the preparation process of the coal-based nano hydrocarbon fuel, the subsequent production process is influenced, the production equipment is damaged, the foam generation can be inhibited by adding the defoaming agent, the generated foam is eliminated, and the production and the preparation of the coal-based nano hydrocarbon fuel are facilitated.
The addition amount of the additive is closely related to the production cost of the coal-based nano hydrocarbon fuel, the cost of the coal-based nano hydrocarbon fuel is further increased due to excessive addition of the additive, the optimal additive addition proportion and the optimal total dosage are determined through experiments and optimization exploration, the coal-based nano hydrocarbon fuel can be prepared at relatively low cost while the quality of the coal-based nano hydrocarbon fuel is ensured, and the optimal economy is achieved.
According to the system of the invention, the mixing device is preferably a mixing valve, which is connected to the feed pump for each additive. Preferably, the mixing valve is further provided with a valve regulator to control the opening and closing degree of the mixing valve.
According to the system of the invention, a stirrer is arranged in the additive homogenizing device, and a metering pump is connected to a discharge port of the additive homogenizing device, so that the stirring speed is high, preferably 8000-10000r/min.
According to the system, the stirrer is arranged in the front distribution tank, the rotating speed is preferably 8000-10000r/min as same as that of a homogenizing device, comprehensive kinetic energy effects such as high frequency, strong circumferential tangential velocity, angular velocity and the like are formed through high-speed stable rotation of the stirrer, so that the additive and the preparation raw materials are fully mixed, meanwhile, the discharge port of the stirrer is connected with an output screw pump, and the delivery of the coal-based nano hydrocarbon fuel in the preparation process is realized through the screw pump.
According to the system, the nano processor is a nano mill, and is used for carrying out nano treatment on the additive and the preparation raw material, and grinding to obtain the nano-particle size hydrocarbon fuel. The average grain diameter of the prepared raw coal (coal powder) is 150 micrometers after the previous pretreatment process, and the average grain diameter of the coal-based nano hydrocarbon fuel is 400-800 nanometers.
According to the system, a stirrer is arranged in the cooling tank, the temperature of the newly prepared coal-based nano hydrocarbon fuel is 80-90 ℃, the newly prepared coal-based nano hydrocarbon fuel is sent into the cooling tank through an output screw pump connected with a nano processor to be stirred, cooled and cooled, and the next production process is carried out after the temperature is reduced to below 50 ℃, for example, 40-50 ℃.
According to the system of the invention, a propeller type stirrer is arranged in the dispersing agent dispensing device, the rotating speed is preferably 400-500r/min, the volume circulation is taken as the main part, the circulating speed is high, the liquid flows radially during stirring, eddy current is not easy to form, the powdery medicament forms large particle groups of the water-in-water medicament, the full dissolution of the dispersing agent is facilitated, and the dispersing agent dispensing device is also connected with a feeding pump.
According to the system, the stirrer is arranged in the dispersing agent homogenizing device, the rotating speed is preferably 8000-10000r/min, the coal-based nano hydrocarbon fuel and the dispersing agent are fully mixed in the dispersing agent homogenizing device, interaction occurs, the viscosity of the coal-based nano hydrocarbon fuel is reduced, the fluidity of the coal-based nano hydrocarbon fuel is improved, and meanwhile, the discharge hole of the coal-based nano hydrocarbon fuel is connected with the output screw pump. The addition amount of the dispersing agent is preferably 0.5-1% of the preparation amount of the nano hydrocarbon, and is adjusted according to the concentration and viscosity of the prepared coal-based nano hydrocarbon fuel to ensure that the viscosity is less than 1000mPa & s.
The system further comprises a finished product storage device, and materials in the dispersing agent homogenizing device are input into the finished product storage device through a screw pump of the dispersing agent homogenizing device.
According to the system of the present invention, the additive dispensing device may be provided with a signal acquisition device for acquiring signals including the liquid level of the medicine tank, the flow rate of the medicine, the temperature, and the like, and a controller for receiving and adjusting the signals.
The second aspect of the present invention provides a preparation method of the above coal-based nano hydrocarbon fuel preparation dosing system, including the following steps:
1) Respectively preparing a wetting agent, a defoaming agent and a grinding aid by an additive dispensing device;
2) Adding the prepared wetting agent, the prepared defoaming agent and the prepared grinding aid into a mixing device according to a proportion, mixing, adding the mixture into an additive homogenizing device, and homogenizing and mixing under a stirring state;
3) Adding the homogeneous mixed additive obtained in the step 2) and pulverized coal and softened water required by the preparation of the externally provided coal-based nano hydrocarbon fuel into a pre-preparation tank, and mixing;
4) Adding the mixture obtained in the step 3) into a nano processor, and carrying out nano processing treatment to prepare the coal-based nano hydrocarbon fuel;
5) Adding the coal-based nano hydrocarbon fuel prepared in the step 4) into a cooling tank for cooling;
6) And (3) preparing a dispersing agent through a dispersing agent dispensing device, adding the dispersing agent and the coal-based nano hydrocarbon fuel cooled in the step 5) into a dispersing agent homogenizing device, and homogenizing and mixing under a stirring state to obtain a finished product of the coal-based nano hydrocarbon fuel.
According to the method, in the step 2), the addition ratio of the wetting agent, the defoaming agent and the grinding aid is =1 and 3, and the whole addition amount is 0.5-1% of the preparation amount of the coal-based nano hydrocarbon fuel.
According to the method, in the step 5), the coal-based nano hydrocarbon fuel is cooled to 40-50 ℃.
According to the method, the adding amount of the dispersing agent in the step 6) is 0.5-1% of the preparation amount of the nano hydrocarbon.
According to the method of the invention, in the step 2) and the step 6), the stirring speed of the homogeneous mixing is 8000-10000r/min.
According to the method, the average grain diameter of the raw material coal powder in the step 3) is 150 microns, and the average grain diameter of the prepared coal-based nano hydrocarbon fuel is 400-800 nanometers.
By adopting the technical scheme, the method has the following technical effects:
(1) By adopting the preparation dosing system, various additives required by the preparation of the coal-based nano hydrocarbon fuel can be added in different stages according to a reasonable proportion in the production process, so that the production efficiency is increased, and the production cost is reduced; the adding conditions of different additives can be mastered in real time, and the adjustment can be carried out in time according to the actual production conditions, so that the product quality is ensured.
(2) The system can realize automatic control and remote control of the additive, and reduce the labor intensity of operators.
(3) The system of the invention can be provided with stirrers with different forms and rotating speeds according to different additives and the specific requirements of the production process. The form of the feed pump can also be selected to suit the nature of the material to be conveyed.
In conclusion, the invention provides a preparation dosing system suitable for additives of different types and different purposes in the preparation process of coal-based nano hydrocarbon fuel, so that the precise control of the additives of various types is realized, and the continuous and stable production process is realized.
Drawings
FIG. 1 is a schematic structural diagram of a coal-based nano hydrocarbon fuel preparation dosing system according to an example of the present invention.
Some of the reference numbers in the figures are explained below: the system comprises an antifoaming agent dispensing device 1, a grinding aid dispensing device 2, a wetting agent dispensing device 3, additive feeding pumps 4, 5 and 6, a mixing device 7, an additive homogenizing device 8 and a feeding pump 9 thereof, a preposed preparation tank 10 and a feeding pump 11 thereof, a nano processor 12 and a feeding pump 13 thereof, a cooling tank 14 and a feeding pump 15 thereof, a dispersing agent dispensing device 16 and a feeding pump 17 thereof, a dispersing agent homogenizing device 18 and a feeding pump 19 thereof, and finished product storage devices 20 and 21.
Detailed Description
In order to better understand the technical solution of the present invention, the following examples are further provided to illustrate the present invention, but the present invention is not limited to the following examples.
In the description of the present invention, the terms "first" and "second" are used for convenience of description and distinction only, and are not intended to limit the number or order. Each device or element used in the system of the present invention may employ corresponding devices or elements that are conventional in the art, unless otherwise specified.
As shown in fig. 1, a dosing system for preparing coal-based nano hydrocarbon fuel in an embodiment of the present invention includes:
at least one additive dosing device (1, 2, 3) and its respective feed pump (4, 5, 6);
the mixing device 7 is respectively communicated with each additive dispensing device (1, 2, 3) and is used for receiving and mixing the additives from each additive dispensing device;
the additive homogenizing device 8 and the feeding pump 9 thereof are communicated with the mixing device 7 and are used for homogenizing and mixing various additives from the mixing device;
the pre-distribution tank 10 and the feed pump 11 thereof are used for receiving and mixing the homogenized additive, and pulverized coal and softened water required by the preparation of the externally provided coal-based nano hydrocarbon fuel;
the nano processor 12 and the feeding pump 13 thereof are used for receiving the mixed material from the pre-distribution tank 10, performing nano processing treatment and preparing the coal-based nano hydrocarbon fuel;
the cooling tank 14 and the feeding pump 15 thereof are used for receiving and cooling the prepared coal-based nano hydrocarbon fuel;
a dispersant dispensing device 16 and a feed pump 17 thereof for supplying a dispersant;
and the dispersing agent homogenizing device 18 and the feeding pump 19 thereof are used for receiving the cooled coal-based nano hydrocarbon fuel and the dispersing agent, and mixing the coal-based nano hydrocarbon fuel and the dispersing agent to obtain a finished coal-based nano hydrocarbon fuel product.
Wherein the addition amount of each component is as follows:
m (coal powder) = Mxomega (coal-based nano hydrocarbon fuel)/100-omega (H) 2 O)
M (additive) = M x omega (b)/omega (a)
M (demineralized water) = M-M (pulverized coal) -M (additive)
Wherein M is the preparation amount of the coal-based nano hydrocarbon fuel;
m (coal powder) is the mass of the needed coal powder;
omega (coal-based nano hydrocarbon fuel) is the concentration,%, of the coal-based nano hydrocarbon fuel;
ω(H 2 o) is the water content of the coal powder,%;
m (additive) is the mass of the additive needed for preparing the coal-based nano hydrocarbon fuel;
omega (a) is the content of the effective component of the additive,%;
omega (b) is the addition amount of different additives,%;
m (demineralized water) is the amount of demineralized water used.
For ease of understanding, with reference to fig. 1, the following example illustrates a specific structural arrangement of the system of the present invention, and it should not be understood that the technical solution of the present invention is limited thereto:
preferably, the additive dosing devices comprise a defoamer dosing device 1, a grinding aid dosing device 2 and a wetting agent dosing device 3, wherein additives with corresponding concentrations are dispensed according to needs. Preferably, the dispensing device may select a dosing tank with an agitator.
When the additive is liquid, the stirrer adopts a straight blade type stirring paddle, so that the uniformity of the components of the medicament can be ensured, the structure is simple, and the cost is lower.
The supply pumps (4, 5, 6) of the additive dosing device are preferably metering pumps. The addition amount of different additives can be accurately controlled through the metering pumps corresponding to the additives.
The mixing device 7 is preferably a mixing valve which is connected to the respective feed pump (4, 5, 6) for the respective additive. Preferably, the mixing valve is further provided with a valve adjuster (not shown, of conventional construction) for controlling the opening and closing degree of the mixing valve.
The additive homogenizing device 8 is a homogenizing tank provided with a stirrer inside, and a feeding pump 9 connected with a discharge port of the additive homogenizing device is preferably a metering pump.
The stirrer is arranged in the front distribution groove 10, comprehensive kinetic energy effects such as high-frequency, strong circumferential tangential velocity, angular velocity and the like are formed through high-speed and stable rotation of the stirrer, so that the additive and the preparation raw materials are fully mixed, the feeding pump 11 connected with a discharge port of the stirrer is preferably a screw pump, and the coal-based nano hydrocarbon fuel is conveyed in the preparation process through the screw pump.
The nano processor 12 is a nano mill, and is used for nano processing the additive and the preparation raw material and grinding the additive and the preparation raw material to obtain the hydrocarbon fuel with the nano particle size.
A stirrer is arranged in the cooling tank 14, and the newly prepared coal-based nano hydrocarbon fuel is fed into the cooling tank 14 through a metering pump 13 connected with the nano processor 12, preferably a screw pump, for cooling, and enters the next production process after the temperature is reduced to below 50 ℃.
Preferably, the dispersant dispensing device 16 is a dispensing tank with a propeller agitator inside, and the volume circulation is the main, the circulation rate is high, the liquid is enabled to flow radially when being stirred, and the vortex is not easy to form so that the powdery medicament forms large particle groups of the water-in-water medicament, which is beneficial to fully dissolving the dispersant, and similarly, the feed pump 17, preferably a metering pump, is connected to the discharge port of the dispersant dispensing device.
The dispersant homogenizing device 18 is a homogenizing tank with a stirrer arranged inside, the coal-based nano hydrocarbon fuel is fully mixed with the dispersant in the homogenizing tank to generate interaction, the viscosity of the coal-based nano hydrocarbon fuel is reduced, the fluidity of the coal-based nano hydrocarbon fuel is improved, and a feeding pump 19 connected with a discharge port of the coal-based nano hydrocarbon fuel is preferably a screw pump.
The system of the invention also comprises finished product storage devices 20 and 21, and the materials in the dispersing agent homogenizing device 18 are input into the finished product storage devices through screw pumps of the dispersing agent homogenizing device.
In another example, the additive dispensing apparatus may further include a signal acquisition device that acquires signals including a medicine tank liquid level, a medicine flow rate, a temperature, and the like, and a controller that receives and adjusts the signals. The controller can mainly have two functions, namely a process flow picture display function and a system control function. For the display of the process flow picture, the controller mainly displays the following contents, such as the liquid level of a medicine box, the flow rate of the medicine, the temperature, the switching state of a valve switch and the like, so that an operator can master the production dynamics in real time. In the aspect of operation function operation of the system, the automatic control and remote control of a motor, a water pump and a valve in the system can be realized, and the labor intensity of operators is reduced. The specific structure is conventional and will not be described further.
The preparation method of the coal-based nano hydrocarbon fuel preparation dosing system comprises the following steps:
1) Respectively preparing a wetting agent, a defoaming agent and a grinding aid by additive dispensing devices (1, 2 and 3);
2) Adding the prepared wetting agent, the defoaming agent and the grinding aid into a mixing device 7 according to a certain proportion, mixing, adding the mixture into an additive homogenizing device 8, and homogenizing and mixing under a stirring state;
3) Adding the homogeneous mixed additive obtained in the step 2) and pulverized coal and softened water required by the preparation of the externally provided coal-based nano hydrocarbon fuel into a pre-distribution tank 10, and mixing;
4) Adding the mixture obtained in the step 3) into a nano processor 12, and performing nano processing treatment to prepare the coal-based nano hydrocarbon fuel;
5) Adding the coal-based nano hydrocarbon fuel prepared in the step 4) into a cooling tank 14 for cooling;
6) And (3) preparing a dispersing agent by a dispersing agent dispensing device 16, adding the dispersing agent and the coal-based nano hydrocarbon fuel cooled in the step 5) into a dispersing agent homogenizing device 18, and homogenizing and mixing under a stirring state to obtain a finished product of the coal-based nano hydrocarbon fuel.
In the step 2), the addition ratio of the wetting agent, the defoaming agent and the grinding aid is = 1.
In the step 5), the coal-based nano hydrocarbon fuel is cooled to 40-50 ℃, such as 45 ℃ and 40 ℃.
The adding amount of the dispersing agent in the step 6) is 0.5-1%, such as 0.5%,0.8% and 1% of the preparation amount of the nano hydrocarbon.
In the steps 2) and 6), the stirring speed for homogeneous mixing is 8000-10000r/min, such as 8000r/min, 9000r/min and 10000r/min.
The average grain diameter of the raw material coal powder in the step 3) is 150 microns, and the average grain diameter of the prepared coal-based nano hydrocarbon fuel is 400-800 nanometers, such as 400, 500, 600 and 800 nanometers.
For easy understanding, referring to fig. 1, the following example illustrates the application operation method flow of the system in the production process, and it should not be understood that the technical solution of the present invention is limited thereto:
the additive with corresponding concentration is prepared through a defoaming agent dosing device 1, a grinding aid dosing device 2 and a wetting agent dosing device 3 respectively according to the production requirements, the three agents are reasonably proportioned through regulating and controlling a feeding pump (4, 5 and 6), the three agents pass through a mixing device 7 and enter an additive homogenizing device 8 for sufficient homogeneous mixing, the mixed additive enters a preposed dosing tank 10 together with pulverized coal and softened water required by the preparation of the coal-based nano hydrocarbon fuel through a homogenizing device feeding pump 9, high-frequency strong circular tangential velocity, angular velocity and other comprehensive kinetic energy efficiencies are formed through the high-speed stable rotation of a rotor, the additive and the preparation raw materials are fully mixed, the mixed material is pumped to a nano processor 12 through a preposed dosing tank feeding pump 11, the nano processing treatment is carried out, and the coal-based nano hydrocarbon fuel is prepared. As more heat is generated in the nanocrystallization process, the coal-based nano hydrocarbon fuel which is just prepared has higher temperature which can reach 80-90 ℃, and the subsequent dispersing agent is denatured due to the overhigh temperature, so that the original effect is lost. Therefore, the newly prepared coal-based nano hydrocarbon fuel needs to be subjected to certain cooling treatment, the newly prepared coal-based nano hydrocarbon fuel is conveyed into a cooling tank 14 through a nano machine output feeding pump 13 for cooling, and the next production process is carried out after the temperature is reduced to below 50 ℃. The dispersing agent adopts powder medicament, need prepare in advance, dispersing agent dispensing device 16 adopts the propulsion thick liquid formula agitating unit, mainly by the volume circulation, the circulation rate is high, make liquid produce radial flow during the stirring, be difficult for forming the vortex again and cause the big granule group of powdered medicament formation water drum medicine, be favorable to fully dissolving of dispersing agent, the dispersing agent that prepares passes through dispersing agent feed pump 17, add dispersing agent homogeneity device 18 according to reasonable charge, simultaneously, the coal base nanometer hydrocarbon fuel of cooling completion adds dispersing agent homogeneity device 18 through cooling tank feed pump 15, fully mix with the dispersing agent, take place the interact, reduce the viscosity of coal base nanometer hydrocarbon fuel, improve its mobility. Finally, it is pumped by a homogenizer supply pump 19 into product storage (20, 21).
The batching tank, the stirrer, the metering pump, the homogenizing tank, the nano mill and the like adopted by the invention can adopt the existing processing facilities, devices or elements with corresponding functions in the field, and the details are not repeated. Those skilled in the art will understand or know what is not described herein, and will not be described in detail.
It will be appreciated by those skilled in the art that modifications or adaptations to the invention may be made in light of the teachings of the present specification. Such modifications or adaptations are intended to be within the scope of the present invention as defined in the claims.
Claims (10)
1. A coal-based nano hydrocarbon fuel preparation dosing system is characterized in that: the method comprises the following steps:
at least one additive dispensing device;
the mixing device is respectively communicated with each additive dispensing device and is used for receiving and mixing the additives from each additive dispensing device;
the additive homogenizing device is communicated with the mixing device and is used for homogenizing and mixing various additives from the mixing device;
the pre-distribution trough is used for receiving the homogenized additive and pulverized coal and softened water required by the preparation of the externally provided coal-based nano hydrocarbon fuel, and mixing the pulverized coal and the softened water;
the nano processor is used for receiving the mixed material from the front distribution tank, performing nano processing and preparing the coal-based nano hydrocarbon fuel;
the cooling tank is used for receiving and cooling the prepared coal-based nano hydrocarbon fuel;
a dispersant dispensing device for providing a dispersant;
the dispersing agent homogenizing device is used for receiving the cooled coal-based nano hydrocarbon fuel and the dispersing agent and mixing the cooled coal-based nano hydrocarbon fuel and the dispersing agent to obtain a finished coal-based nano hydrocarbon fuel product;
the nano processor is a nano mill and is used for nano-processing a mixed material consisting of raw material coal powder with the average particle size of 150 microns and an additive to obtain the coal-based nano hydrocarbon fuel with the average particle size of 400-800 nanometers;
the additive dispensing device comprises a defoaming agent dispensing device, a grinding aid dispensing device and a wetting agent dispensing device; the additive dispensing device can be provided with a signal acquisition device and a controller, wherein the signal acquisition device comprises a medicine box liquid level, a medicine flow and a temperature;
when the additive in the dosing tank of the additive dispensing device is liquid, the stirrer arranged in the device is a straight blade type stirrer, and the rotating speed is 400-500r/min;
the stirrer arranged in the dispersing agent dispensing device is a pushing paddle type stirrer, and the rotating speed is 400-500r/min;
the inside of the additive homogenizing device, the preposed batching groove and the dispersing agent homogenizing device are all provided with stirrers with the rotating speed of 8000-10000r/min.
2. The coal-based nano hydrocarbon fuel preparation dosing system according to claim 1, characterized in that: when the additive of the additive dispensing device is liquid, the stirrer adopts a straight blade type stirring paddle; and/or the additive dispensing device is provided with a feeding pump connected with the additive dispensing device.
3. The coal-based nano hydrocarbon fuel preparation dosing system according to claim 2, characterized in that: the feeding pump is a metering pump.
4. The coal-based nano hydrocarbon fuel dispensing and dosing system according to claim 1, wherein: the mixing device is a mixing valve, and the mixing valve is respectively connected with the feeding pumps of the additives.
5. The coal-based nano hydrocarbon fuel dispensing and dosing system according to claim 4, wherein: the mixing valve is also provided with a valve regulator to control the opening and closing degree of the mixing valve.
6. The coal-based nano hydrocarbon fuel preparation dosing system according to claim 1, characterized in that: a discharge hole of the additive homogenizing device is connected with a metering pump; and/or the discharge hole of the front distribution groove is connected with a screw pump.
7. The coal-based nano hydrocarbon fuel preparation dosing system according to claim 1, characterized in that: and a stirrer is arranged in the cooling tank, and the prepared coal-based nano hydrocarbon fuel is sent into the cooling tank for cooling through a screw pump connected with the nano processor.
8. The coal-based nano hydrocarbon fuel preparation dosing system according to claim 1, characterized in that: the discharge hole of the dispersing agent dispensing device is also connected with a feed pump; and/or a discharge port of the dispersing agent homogenizing device is connected with an output screw pump.
9. The preparation method of the coal-based nano hydrocarbon fuel preparation dosing system according to any one of claims 1 to 8, characterized in that: the method comprises the following steps:
1) Respectively preparing a wetting agent, a defoaming agent and a grinding aid by an additive dispensing device;
2) Adding the prepared wetting agent, the defoaming agent and the grinding aid into a mixing device according to a certain proportion, mixing, adding the mixture into an additive homogenizing device, and homogenizing and mixing under a stirring state;
3) Adding the homogeneous mixed additive obtained in the step 2) and pulverized coal and softened water required by the preparation of the externally provided coal-based nano hydrocarbon fuel into a pre-preparation tank, and mixing;
4) Adding the mixture obtained in the step 3) into a nano processor, and carrying out nano processing treatment to prepare the coal-based nano hydrocarbon fuel;
5) Adding the coal-based nano hydrocarbon fuel prepared in the step 4) into a cooling tank for cooling;
6) A dispersing agent is prepared through a dispersing agent dispensing device, the dispersing agent and the coal-based nano hydrocarbon fuel cooled in the step 5) are added into a dispersing agent homogenizing device, and the mixture is homogenized and mixed under a stirring state, so that a finished coal-based nano hydrocarbon fuel product is obtained;
wherein, the weight ratio of the wetting agent, the defoaming agent and the grinding aid added in the step 2) is 1-2.
10. The preparation method of the coal-based nano hydrocarbon fuel preparation dosing system according to claim 9, characterized in that: cooling the coal-based nano hydrocarbon fuel to 40-50 ℃ in the step 5), and/or adding the dispersant in the step 6) in an amount of 0.5-1% of the weight of the nano hydrocarbon fuel; and/or, the stirring speed of the homogeneous mixing in the step 2) and the step 6) is 8000-10000r/min; and 3) the average grain diameter of the raw material coal powder is 150 microns, and the average grain diameter of the prepared coal-based nano hydrocarbon fuel is 400-800 nanometers.
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