Method and system for crushing, dispersing and homogenizing solid-liquid mixture

Abstract

The invention discloses a solid-liquid mixture crushing, dispersing and homogenizing method and system, and the method comprises the following steps: (1) adding coking byproducts from the top of a primary mixing tank, falling to a sieve plate of the primary mixing tank, and then falling to the lower layer of the primary mixing tank under the action of a scraper plate; after the solvent is added from the top of the primary mixing tank and falls into the sieve plate, the solvent and the coking by-product are primarily mixed in the primary mixing tank through a stirrer; (2) the solid-liquid mixture obtained after preliminary mixing enters a grinding pump or a squeezing pump to be coarsely crushed and then enters a final mixing tank through a conveying pump, and the solid-liquid mixture is kept in a dynamic dispersion state under the stirring action of a double-layer stirrer; and (3) carrying out high-speed shearing on the solid-liquid mixture in the final mixing tank by adopting a high-speed dispersion shearing pump, and carrying out superfine grinding on the solid-liquid mixture in the final mixing tank by adopting a superfine grinding machine to finally obtain the high-QI slurry. The solid-liquid mixture can be crushed and uniformly dispersed, the high-QI raw material is obtained, waste is turned into wealth, and economic value is created.

Description

Technical Field

[0001] The invention belongs to the technical field of coal chemical industry and relates to a method and system for crushing, dispersing and homogenizing a solid-liquid mixture. Background Art

[0002] Some by-products will be generated during the production process of tar processing plants, such as asphalt dust powder and dust coke powder, which are powders collected by environmental dust removal devices; ground asphalt is a substandard product cleaned out of forming pools, belt conveyors, etc.; tar slag is a hazardous waste cleaned out; if these by-products are not handled properly, they will not only cause waste of resources, but also pollute the environment. The current comprehensive utilization method is generally used as fuel, raw material for coking coal blending, and binder for shaped coal, and the added value of such treatment is low. In recent years, physical methods have been used to separate tar and slag powder (for coal blending). This method is a low-value utilization, and there is still a risk of slag powder transfer. Catalytic oxidation cracking to produce blue coke and coal tar, extraction of coal tar and preparation of water-coal slurry, carbonization and refining of coal tar to produce activated carbon, etc., but these treatment methods are complex, require large investments, and have high costs for small-scale treatment.

[0003] Chinese patent application number CN201010211351.9 discloses a powder conveying device in the field of environmental protection, specifically a weighing conveyor, characterized in that it includes a screw feeder, a micro-feeder and an air locker that are flexibly connected in sequence, and the air locker is connected to an ejector; wherein a metering bin is provided in the micro-feeder, a bracket is provided on one side of the metering bin, a transmission shaft is provided on the bracket, one end of the transmission shaft is connected to a motor, a spring is provided at the other end of the transmission shaft, and the other end of the spring extends out of the other side of the metering bin, and the metering bin is also connected to a weighing sensor; it can not only uniformly convey powder, prevent powder blockage, and prevent air channeling, but also weigh powder with high precision and add the appropriate amount. The device is mainly used for weighing and conveying powder, and cannot be used to process coking byproducts with high viscosity.

[0004] Chinese patent application number CN200810138748.2 discloses a quantitative uniform dispersing feeding device, which is characterized in that two layers of stainless steel cylinders (102) are arranged at the entrance of the feeding storage device (1), and high-strength magnetic rods (102a) are installed in the cylinders, which form a magnetic separation device for adsorbing magnetic materials; a dispersing discharge device (3) is connected to the discharge port of the spiral feeding device (2), wherein a dispersing screen (301) and a vibrator (305) are arranged in the middle, and a compressed air ejection device (304) is arranged at the lower end. The advantages of the present invention are that the magnetic material can be effectively removed by the magnetic separation device of the feeding storage device, the impurity content can be reduced, and the agglomeration and clogging phenomenon can be avoided; the spiral feeding device can accurately control the feeding amount; the ejection device at the lower part of the lower hopper can make the powder dispersed uniformly with the compressed air and enter the reactor with the compressed air. The device mainly solves the agglomeration and clogging problems in the process of ultrafine powder transportation, and does not disclose the processes of two-phase mixing, stirring, heating, grinding, high-speed shearing, fine grinding, etc.

[0005] Chinese patent application number CN200510100026.4 discloses a method for feeding ceramic tile powder and its feeding equipment, characterized in that the feeding method includes the following steps: (1) firstly, the ceramic powder is spread on the powder conveying device; (2) the powder conveying device is moved as a whole to the ceramic press mold, and the powder and the powder conveying device are kept relatively still during the movement; (3) the ceramic powder is dropped into the lower mold of the press; the equipment includes a mixing device, a fixed frame, a powder conveying device, and a distribution hopper, and the powder conveying device is arranged on the fixed frame, characterized in that the equipment is also provided with a horizontal driving device, the horizontal driving device is fixed on the fixed frame, and the horizontal driving device is connected to the powder conveying device to form a horizontal reciprocating motion. The ceramic tiles produced by the above method and equipment have a style similar to that of natural stone. This technology is mainly used to solve the feeding problem of ceramic powder, which is different from the field of the present invention, and it is also impossible to use it to process coking byproducts with high viscosity to improve their utilization value.

[0006] Wang Xiugang, Guo Luyang, Ye Xiaofeng, et al. (Comparison of solid-liquid dispersion performance of three types of paddles in slurry polymerization reactors

[0007] [J]. Chemical Reaction Engineering and Technology, 2019, 35(4): 358-367) The results show that the stirring power increases with the increase of the speed. At the same speed, the power consumption of the three impellers is in the order of anchor propeller, ribbon propeller and pitched blade propeller from large to small; at the same Reynolds number (Re), the order of the solid-liquid power coefficient of the three impellers is in the order of pitched blade propeller, ribbon propeller and anchor propeller from large to small; the power consumption to achieve the same concentration field variance is in the order of anchor propeller, ribbon propeller and pitched blade propeller from large to small. Judging from the concentration distribution behavior on the characteristic line, the three impeller types all have critical speeds for the degree of mixing; taking the concentration field variance as a quantitative indicator, the three impeller types all have optimal solid-liquid dispersion speeds. Combining the two, the recommended range of actual operating speeds for anchor propellers is 120-480r / min, for ribbon propellers is 240-600r / min, and for pitched blade propellers is 120-600r / min. This technology has determined through research the effects of the blade form and rotation speed in the slurry polymerization reactor on the liquid-solid dispersion properties in the reactor. It is only a mixing process and does not disclose processes such as feeding, heating, grinding, high-speed shearing, and fine grinding, and cannot improve the utilization value of coking by-products.

[0008] Sun Xiaoxu, Zhu Qiheng, Yao Jianchao, et al. (Study on the influence of key parameters of stirring device for ultrafine grinding based on CFD)

[0009] [J]. Nonferrous Metals, 2021(1):76-81) By analyzing four commonly used stirring device types, namely disc type, spiral type, impeller type and rod type, it was determined that the disc type is a more suitable stirring device for ultrafine grinding. A simulation analysis model was established using computer simulation fluid mechanics for simulation analysis. The flow field distribution state and input power change of the stirring device were obtained through simulation, and the influence relationship and change range between the rotation speed, stirring element diameter, spacing, area ratio and flow field and power were analyzed in detail. Through simulation, it was determined that the stirring speed range is 300-800r / min, the stirring element diameter range is 150-170mm, the stirring element spacing range is about 30mm, and the gap area ratio range is 0.15-0.35. The determination of each parameter has laid the foundation for the research and development of ultrafine grinding technology and equipment in experiments and industry. This technology is mainly used for the research of ultrafine grinding technology, and the complete set of technologies such as high-viscosity material transportation, stirring, graded grinding, dispersion, and ultrafine grinding are not disclosed.

[0010] Zhang Shengnan (Transformation of Special Resin Grinding System [J]. China Chlor-Alkali, 2017(5): 15-16) introduced the technical transformation and achievements made in the production process of special resins to address the problem of uneven material feeding in the pulverizing system. The introduction of the homogenizing feeder greatly improved the uneven material feeding phenomenon in the pulverizing system, reduced the start-stop frequency of the pulverizer, increased the service life and production capacity of the pulverizer, and provided favorable guarantees for the high yield and high quality of the finished product. The frequent tripping of the pulverizer caused by uneven material feeding was reduced by modifying the feeding system, and the goal of stable production and increased efficiency was achieved through the improvement. This technology mainly solves the problem of uneven powder, and does not disclose the process of material transportation, mixing, and graded grinding to obtain a homogeneous slurry.

[0011] In view of the above situation, it is urgent to develop a method for the rational disposal of coking by-products such as asphalt dust powder, dust coke powder, ground asphalt, tar tank slag, etc., which can improve the utilization value of coking by-products while reducing environmental pollution, turning waste into treasure, and improving economic benefits. Summary of the invention

[0012] In view of the above-mentioned defects existing in the prior art, the purpose of the present invention is to provide a method and system for crushing, dispersing and homogenizing a solid-liquid mixture, using an appropriate solvent to dilute and liquefy the coking by-products, and through stirring, primary mixing, coarse crushing, high-speed shearing and ultrafine grinding, the solid-liquid mixture is crushed and evenly dispersed to obtain a high QI slurry, thereby turning waste into treasure and creating economic value.

[0013] To achieve the above object, the present invention adopts the following technical solution:

[0014] The first aspect of the present invention provides a method for crushing, dispersing and homogenizing a solid-liquid mixture, comprising the following steps:

[0015] (1) The coking by-products are added from the top of the primary mixing tank, fall onto the sieve plate of the primary mixing tank, and then fall into the lower layer of the primary mixing tank under the action of the scraper plate; the solvent is added from the top of the primary mixing tank and preliminarily mixed with the coking by-products in the primary mixing tank through a stirrer;

[0016] (2) The solid-liquid mixture after preliminary mixing enters a grinding pump or a squeezing pump for rough crushing, and then enters a final mixing tank through a delivery pump. The solid-liquid mixture is kept in a dynamically dispersed state under the stirring action of a double-layer agitator;

[0017] (3) A high-speed dispersing shear pump is used to perform high-speed shearing and crushing on the solid-liquid mixture in the final mixing tank, and an ultrafine grinder is used to perform ultrafine grinding on the solid-liquid mixture in the final mixing tank, and the solid-liquid mixture is subjected to cyclic shearing and grinding for 2 to 24 hours to obtain a high QI slurry.

[0018] Preferably, in step (1):

[0019] The coking byproducts include one or more of asphalt dust powder, coke dust powder, ground asphalt and tar slag; and / or

[0020] The solvent is one or more of tar, methyl naphthalene oil, flash oil or anthracene oil; and / or

[0021] The mass ratio of the coking by-product to the solvent is 1:(1-4).

[0022] Preferably, in step (1):

[0023] The sieve plate is provided with a plurality of sieve holes with a pore size of 8 to 20 mm; and / or

[0024] The preliminary mixing is performed by heating a coil heater arranged inside the preliminary mixing tank, wherein the coil heater is heated by steam, and the heating temperature is controlled at 40 to 90° C. by a steam regulating valve; and / or

[0025] During the preliminary mixing, the stirring speed of the stirrer is 20 to 100 rpm; and / or

[0026] In the preliminary mixing, the mixing time is 3 to 24 hours.

[0027] Preferably, in step (2):

[0028] The double-layer agitator is connected to a reducer, and the stirring speed of the double-layer agitator is 30 to 100 rpm; and / or

[0029] The outer wall of the final mixing tank is provided with an external heater for heating. The external heater is heated by steam, and the heating temperature is controlled at 50-100° C. by a steam regulating valve.

[0030] Preferably, in step (3), the relative shear speed of the rotor and stator of the high-speed dispersive shear pump is 1000-2000 rpm; and / or

[0031] The ultrafine grinding machine uses zirconium oxide balls, high-aluminum ceramic balls or stainless steel balls as grinding media, and the particle size is 0.3-1.0 mm; and / or

[0032] The cyclic shearing and grinding time is 3 to 12 hours.

[0033] Preferably, in step (3), the QI content of the high QI slurry is 5-40%, and the particle size thereof is less than 10 μm.

[0034] Preferably, a steam companion pipe is provided on the pipeline used by the solid-liquid mixture to enter other components, and the steam temperature used in the steam companion pipe is 100-130°C.

[0035] The second aspect of the present invention provides a solid-liquid mixture crushing, dispersion, and homogenization system, comprising a feeding device, a primary mixing tank, a final mixing tank, a high-speed dispersing shear pump, and an ultrafine grinder; the feeding device is connected to the feeding port on the top of the primary mixing tank; a solvent inlet is arranged on the top of the primary mixing tank, a sieve plate, an agitator, and a scraper plate are arranged in the primary mixing tank, the scraper plate is arranged above the sieve plate, the lower part of the primary mixing tank is connected to the feeding port on the top of the final mixing tank through a conveying pipeline, the conveying pipeline is provided with a grinding pump or a squeezing pump for coarsely crushing the solid-liquid mixture, and the conveying pipeline is also provided with a conveying pump; the top of the final mixing tank is provided with a There are a first circulation inlet and a second circulation inlet, a side outlet is provided at the bottom, a bottom outlet is provided at the bottom, and a double-layer agitator is provided inside; the high-speed dispersing shear pump is provided on the first circulation pipeline, and the first circulation pipeline is respectively connected to the bottom outlet and the first circulation inlet of the final mixing tank; the ultrafine grinder is provided on the second circulation pipeline, and the second circulation pipeline is respectively connected to the side outlet and the second circulation inlet of the final mixing tank, and a delivery pump is also provided on the second circulation pipeline; the first circulation pipeline and the second circulation pipeline are also provided with a three-way valve, and the three-way valve is provided close to the first circulation inlet and the second circulation inlet;

[0036] The solid-liquid mixture pulverizing, dispersing and homogenizing system is used to execute the solid-liquid mixture pulverizing, dispersing and homogenizing method as described in the first aspect of the present invention.

[0037] Preferably, the material discharge device comprises a receiving hopper, a screw conveyor or a bucket elevator, and a material discharge hopper which are connected in sequence; the material discharge hopper is connected to a material discharge port at the top of the primary mixing tank.

[0038] Preferably, the scraper plate is mounted on the agitator.

[0039] Preferably, a coil heater is arranged inside the primary mixing tank; the coil heater is heated by steam and is provided with a steam regulating valve.

[0040] Preferably, the outer wall of the final mixing tank is provided with an external heater for heating; the heater is heated by steam and is provided with a steam regulating valve.

[0041] Preferably, the delivery pipeline, the first circulation pipeline and the second circulation pipeline are all provided with steam companion pipes for heating and heat preservation.

[0042] Preferably, the double-layer agitator is connected to a reducer.

[0043] The solid-liquid mixture pulverizing, dispersing and homogenizing method and system provided by the present invention have the following beneficial effects:

[0044] The present invention dilutes and liquefies by-products such as asphalt dust powder, dust coke powder, ground asphalt, and tar tank slag generated in the tar production process with an appropriate solvent, and crushes and evenly disperses the solid-liquid mixture through stirring, primary mixing, coarse crushing, high-speed shearing, and ultra-fine grinding to process it into a high-QI slurry that can be recycled. The present invention can not only solve the problems of resource waste and environmental pollution caused by improper disposal of by-products such as asphalt dust powder, dust coke powder, ground asphalt, and tar tank slag, but also realizes the effective utilization of the higher C and H contents in these coking by-products through reasonable treatment, realizes the transformation of waste into treasure, and creates economic value. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0046] Figure 1 It is a structural schematic diagram of the solid-liquid mixture pulverizing, dispersing and homogenizing method and system of the present invention;

[0047] In the figure, 1, receiving hopper, 2, screw conveyor or bucket elevator, 3, lower hopper, 4, primary mixing tank, 5, sieve plate, 6, scraper plate, 7, agitator, 8, coil heater, 9, steam regulating valve, 10, grinding pump or pressing pump, 11, delivery pump, 12, final mixing tank, 13, double-layer agitator, 14, reducer, 15, external heater, 16, high-speed dispersing shear pump, 17, ultrafine grinder, 18, three-way valve, 19, steam accompanying pipe, 20, first circulation pipeline, 21, second circulation pipeline. DETAILED DESCRIPTION

[0048] In order to better understand the above technical solution of the present invention, the technical solution of the present invention is further described below in conjunction with embodiments.

[0049] Combination Figure 1 As shown, a method for crushing, dispersing and homogenizing a solid-liquid mixture of the present invention comprises the following steps:

[0050] (1) The coking by-products are added from the top of the primary mixing tank 4, fall onto the sieve plate 5 of the primary mixing tank 4, and then fall into the lower layer of the primary mixing tank 4 through the sieve holes under the action of the scraper plate 6; the solvent is added from the top of the primary mixing tank 4, falls onto the sieve plate 5, and then also passes through the sieve holes and is preliminarily mixed with the coking by-products in the primary mixing tank 4 by the agitator 7;

[0051] Specifically, after the asphalt integrated powder, dust-collected coke powder, ground asphalt, tar tank slag and other coking byproducts are unloaded into the receiving hopper 1, they are unloaded into the lower hopper 3 through the screw conveyor / bucket elevator. Then, the solid powder, slag and other coking byproducts fall onto the sieve plate 5 in the primary mixing tank 4 under the action of gravity. The sieve plate 5 is provided with a plurality of sieve holes. The solid powder, slag and other coking byproducts are slowly scraped down through the sieve holes and fall into the lower layer of the primary mixing tank 4 under the action of the rotating scraper plate 6. The scraper plate 6 can prevent the large pieces of material from entering the primary mixing tank 4 without being fully mixed and entering the pipeline to form a blockage. The aperture of the sieve hole provided on the sieve plate 5 is 8 to 20 mm.

[0052] A suitable solvent is selected to dilute and liquefy the coking by-products, such as tar, methyl naphthalene oil, flash oil or anthracene oil; the solvent is added from the top of the primary mixing tank 4, falls onto the sieve plate 5, and then falls into the lower layer of the primary mixing tank 4 through the sieve holes, and the solvent and the coking by-products are preliminarily mixed in the primary mixing tank 4 by the stirrer 7. The mass ratio of the coking by-products to the solvent is 1: (1-4); the stirring speed of the stirrer 7 is 20-100 rpm; and the preliminary mixing time is 3-24 hours.

[0053] When the solvent and the coking by-products are initially mixed, in order to improve the mixing effect, heating is performed using a coil heater 8 arranged inside the primary mixing tank 4. The coil heater 8 is heated by steam, and the heating temperature is controlled by a steam regulating valve 9. For example, the heating temperature is controlled at 40 to 90° C., and in a further preferred embodiment, it is 75 to 85° C.

[0054] (2) The solid-liquid mixture after preliminary mixing enters the grinding pump or the squeezing pump 10 for coarse crushing, and then enters the final mixing tank 12 through the delivery pump 11. The solid-liquid mixture is kept in a dynamically dispersed state under the stirring action of the double-layer agitator 13;

[0055] Specifically, the solid-liquid mixture after preliminary mixing enters the grinding pump or the squeezing pump 10 for rough crushing, and then is pumped into the final mixing tank 12 through the delivery pump 11. The solid-liquid mixture is kept in a dynamic dispersion state after being stirred by the double-layer agitator 13 to prevent sedimentation; wherein the double-layer agitator 13 is connected to the reducer 14, and the double-layer agitator 13 is stirred at a low speed through the reducer 14 to improve the uniformity of the solid-liquid mixture. In a specific embodiment, the stirring speed is 30 to 100 rpm. The outer wall of the final mixing tank 12 is provided with an external heater 15 for heating. The external heater 15 is heated by steam, and the heating temperature can be controlled by the steam regulating valve 9, for example, the heating temperature is controlled at 50 to 100°C, and in a further preferred embodiment, it is 80 to 90°C.

[0056] (3) A high-speed dispersing shear pump 16 is used to perform high-speed shear crushing on the solid-liquid mixture in the final mixing tank 12, and an ultrafine grinder 17 is used to perform ultrafine grinding on the solid-liquid mixture in the final mixing tank 12. After the solid-liquid mixture is cyclically sheared and ground for 2 to 24 hours, a high QI slurry is obtained.

[0057] Specifically, the fully mixed solid-liquid mixture in the final mixing tank 12 enters the high-speed dispersion shear pump 16 from the bottom, and returns to the final mixing tank 12 after being crushed to a certain particle size by high-speed shearing, and circulates continuously; wherein the high-speed dispersion shear pump 16 can break the material to prevent the subsequent entry into the ultrafine grinder 17 from clogging the cavity, and the relative shear rate of the rotor and stator of the high-speed dispersion shear pump 16 is 1000-2000rpm. The solid-liquid mixture in the final mixing tank 12 enters the delivery pump 11 after exiting from the side, and returns to the final mixing tank 12 after ultrafine grinding by the ultrafine grinder 17, and circulates continuously; wherein the ultrafine grinder 17 uses zirconia balls, high-alumina ceramic balls, and stainless steel balls as grinding media, and the particle size thereof is 0.3-1.0mm. After the above-mentioned cyclic shearing and grinding for 2-24h (in a preferred embodiment, the cyclic shearing and grinding time is 3-12h), a homogeneously mixed high QI slurry is obtained, and the high QI slurry can be cut out of the system through the three-way valve 18 to enter the next process. The high QI slurry has a QI content of 5% to 40% and a particle size of less than 10 μm, and can be used as a raw material for improving the QI of tar.

[0058] In the above method, a steam companion pipe 19 is provided on the pipeline used by the solid-liquid mixture to enter other components (grinding pump / pressing pump 10, delivery pump 11, final mixing tank 12, high-speed dispersing shear pump 16, ultrafine grinder 17). The steam temperature used by the steam companion pipe 19 is 100-130°C. The steam companion pipe 19 uses the steam inside to heat and keep the solid-liquid mixture warm to 80-90°C.

[0059] Combination Figure 1As shown, the present invention also provides a solid-liquid mixture crushing, dispersing and homogenizing system for executing the above method, comprising a feeding device, a primary mixing tank 4, a final mixing tank 12, a high-speed dispersing shear pump 16 and an ultrafine grinder 17; the feeding device is connected to the feeding port at the top of the primary mixing tank 4; a solvent inlet is arranged at the top of the primary mixing tank 4, a sieve plate 5, an agitator 7 and a scraper plate 6 are arranged in the primary mixing tank 4, and the scraper plate 6 is arranged above the sieve plate 5; the lower part of the primary mixing tank 4 is connected to the feeding port at the top of the final mixing tank 12 through a conveying pipeline, and a grinding pump or a squeezing pump 10 and a conveying pump 11 (which can be a gear pump or a screw pump) for coarsely crushing the solid-liquid mixture are arranged on the conveying pipeline; a first circulation pump 10 is arranged at the top of the final mixing tank 12; a first circulation pump 11 is arranged at the top of the final mixing tank 12; a first circulation pump 12 is arranged at the top of the final mixing tank 12 ... A ring inlet and a second circulation inlet are provided, a side outlet is provided at the bottom, a bottom outlet is provided at the bottom, and a double-layer agitator 13 is provided inside; a high-speed dispersing shear pump 16 is provided on the first circulation pipeline 20, and the first circulation pipeline 20 is respectively connected to the bottom outlet and the first circulation inlet of the final mixing tank 12; an ultrafine grinder 17 is provided on the second circulation pipeline 21, and the second circulation pipeline 21 is respectively connected to the side outlet and the second circulation inlet of the final mixing tank 12, and a conveying pump 11 (which can be a gear pump or a screw pump) is also provided on the second circulation pipeline 21; a three-way valve 18 is also provided on the first circulation pipeline 20 and the second circulation pipeline 21, and the three-way valve 18 is arranged close to the first circulation inlet and the second circulation inlet of the final mixing tank 12.

[0060] Combination Figure 1 As shown, the material discharge device includes a receiving hopper 1, a screw conveyor or bucket elevator 2, and a material discharge hopper 3 which are connected in sequence; the material discharge hopper 3 is connected to a material discharge port on the top of a primary mixing tank 4. After the coking by-products are discharged into the receiving hopper 1, they are discharged into the material discharge hopper 3 through the screw conveyor or bucket elevator 2, and then enter the primary mixing tank 4 for primary mixing under the action of gravity.

[0061] Combination Figure 1 As shown, in the primary mixing tank 4, the scraper plate 6 is installed on the agitator 7. When the agitator 7 rotates, the scraper plate 6 rotates accordingly, and the coking by-products falling on the screen plate 5 are slowly scraped off through the screen holes, thereby preventing large pieces of material from entering the primary mixing tank 4 and entering the pipeline without being fully mixed, causing blockage.

[0062] Combination Figure 1 As shown, in order to improve the mixing effect, a coil heater 8 is arranged inside the primary mixing tank 4; the coil heater 8 is heated by steam and is provided with a steam regulating valve 9; the coil heater 8 controls the heating temperature through the steam regulating valve 9.

[0063] Combination Figure 1 As shown, the outer wall of the final mixing tank 12 is provided with an external heater 15 for heating; the external heater 15 is heated by steam, and a steam regulating valve 9 is provided on the external heater 15; the heating temperature of the external heater 15 is controlled by the steam regulating valve 9.

[0064] Combination Figure 1 As shown, in order to improve the fluidity of the liquid and the solid-liquid mixture, the conveying pipeline, the first circulation pipeline 20, and the second circulation pipeline 21 are all provided with steam companion pipes 19 for heating and heat preservation.

[0065] Combination Figure 1 As shown, the double-layer agitator 13 is connected to the reducer 14 , and the solid-liquid mixture in the final mixing tank 12 is kept in a dynamically dispersed state by the double-layer agitator 13 , thereby improving the uniformity of the solid-liquid mixture and preventing sedimentation. The double-layer agitator 13 realizes stirring at a low speed through the reducer 14 .

[0066] The solid-liquid mixture pulverizing, dispersing and homogenizing method and system of the present invention are further introduced below with reference to specific examples.

[0067] Example 1

[0068] Combination Figure 1 As shown, the solid-liquid mixture crushing, dispersion, and homogenization method of this embodiment has the following specific process:

[0069] (1) Asphalt dust powder is discharged into the receiving hopper 1 and then discharged into the lower hopper 3 through the screw conveyor. The asphalt dust powder falls by gravity onto the sieve plate 5 in the primary mixing tank 4. The sieve plate 5 has several openings. The asphalt dust powder falls into the lower layer of the primary mixing tank 4 under the action of the rotating scraper plate 6. Tar also falls from the top of the tank onto the sieve plate 5; the coarse particles of the asphalt dust powder and the liquid are preliminarily mixed in the primary mixing tank 4 by the agitator 7, the stirring speed of the agitator 7 is 30rpm, and the preliminary mixing time is 12h. Steam is introduced into the coil heater 8, and the heating temperature is controlled at 75℃ by the steam regulating valve 9; the mass ratio of asphalt dust powder to tar is 1:4.

[0070] (2) The solid-liquid mixture after the initial mixing is roughly crushed by a grinding pump and pumped into the final mixing tank 12 by a screw pump. The solid-liquid mixture is kept dispersed by a double-layer agitator 13 to prevent sedimentation, and is stirred at a speed of 75 rpm by a reducer 14. Steam is introduced into the external heater 15 on the outer wall of the final mixing tank 12, and the heating temperature is controlled at 80° C. by a steam regulating valve 9;

[0071] (3) The fully mixed solid-liquid mixture in the final mixing tank 12 enters the high-speed dispersion shear pump 16 from the bottom, and returns to the final mixing tank 12 after high-speed shearing to a certain particle size, and circulates continuously; wherein, the relative shear speed of the rotor and stator of the high-speed dispersion shear pump 16 is 2000rpm. The solid-liquid mixture in the final mixing tank 12 enters the screw pump from the side outlet, and then returns to the final mixing tank 12 after ultrafine grinding in the ultrafine ball mill; wherein, the ultrafine grinding mill 17 uses zirconium oxide balls as grinding media, and its particle size is 0.3-0.5mm. After the solid-liquid mixture is subjected to high-speed shearing and ultrafine grinding for 12h, a high QI slurry is obtained, which can be cut out of the system through the pneumatic three-way valve 18 to enter the next process; the QI content in the high QI slurry is 5%, and the particle size is less than 5μm, which can be used as a raw material to improve the QI of tar.

[0072] In the above process, all pipelines use steam companion pipes 19, and the steam in the steam pipes heats the solid-liquid mixture to 80°C.

[0073] Example 2

[0074] Combination Figure 1 As shown, the solid-liquid mixture crushing, dispersion, and homogenization method of this embodiment has the following specific process:

[0075] (1) The collected coke powder is discharged into the receiving hopper 1 and then discharged into the lower hopper 3 through the screw conveyor. The collected coke powder falls by gravity onto the sieve plate 5 in the primary mixing tank 4. The sieve plate 5 has several openings. The coke dust falls into the lower layer of the primary mixing tank 4 under the action of the rotating scraper plate 6. Methyl naphthalene oil also falls from the top of the tank onto the sieve plate 5; the coarse particles of coke dust and the liquid are preliminarily mixed in the primary mixing tank 4 by the agitator 7, the stirring speed of the agitator 7 is 80rpm, and the preliminary mixing time is 20h. Steam is introduced into the coil heater 8, and the heating temperature is controlled at 85℃ by the steam regulating valve 9; the mass ratio of coke dust to tar is 1:3.

[0076] (2) The solid-liquid mixture after the initial mixing is roughly crushed by a squeezing pump and pumped into the final mixing tank 12 by a gear pump. The solid-liquid mixture is kept dispersed by a double-layer agitator 13 to prevent sedimentation and is stirred at a speed of 40 rpm by a reducer 14. Steam is introduced into the external heater 15 on the outer wall of the final mixing tank 12, and the heating temperature is controlled at 90° C. by a steam regulating valve 9;

[0077] (3) The fully mixed solid-liquid mixture in the final mixing tank 12 enters the high-speed dispersion shear pump 16 from the bottom, and returns to the final mixing tank 12 after high-speed shearing to a certain particle size, and circulates continuously; wherein, the shear speed of the high-speed dispersion shear pump 16 is 1500rpm. The solid-liquid mixture in the final mixing tank 12 enters the gear pump from the side outlet, and then returns to the final mixing tank 12 after ultrafine grinding in the ultrafine ball mill; wherein, the ultrafine grinding mill 17 uses high-aluminum ceramic balls as grinding media, and its particle size is 0.5-0.7mm. After the solid-liquid mixture is subjected to high-speed shearing and ultrafine grinding for 12 hours, a high-QI slurry is obtained, which can be cut out of the system through the pneumatic three-way valve 18 to enter the next process; the QI content in the high-QI slurry is 32%, and the particle size is less than 8μm, which can be used as a raw material to improve the QI of tar.

[0078] In the above process, all pipelines use steam companion pipes 19, and the steam in the steam pipes heats the solid-liquid mixture to 85°C.

[0079] Example 3

[0080] Combination Figure 1 As shown, the solid-liquid mixture crushing, dispersion, and homogenization method of this embodiment has the following specific process:

[0081] (1) The tar slag is discharged into the receiving hopper 1 and then discharged into the lower hopper 3 through the screw conveyor. The tar slag falls by gravity onto the sieve plate 5 in the primary mixing tank 4. The sieve plate 5 has several openings. The tar slag falls into the lower layer of the primary mixing tank 4 under the action of the rotating scraper plate 6. Anthracene oil also falls from the top of the tank onto the sieve plate 5; the coarse particles of the tar slag and the liquid are preliminarily mixed in the primary mixing tank 4 by the agitator 7, the stirring speed of the agitator 7 is 100rpm, and the preliminary mixing time is 3h. Steam is introduced into the coil heater 8, and the heating temperature is controlled at 80℃ by the steam regulating valve 9; the mass ratio of the tar slag to the tar is 1:1.

[0082] (2) The solid-liquid mixture after the initial mixing is roughly crushed by a grinding pump and pumped into the final mixing tank 12 by a screw pump. The solid-liquid mixture is kept dispersed by a double-layer agitator 13 to prevent sedimentation, and is stirred at a speed of 100 rpm by a reducer 14. Steam is introduced into the external heater 15 on the outer wall of the final mixing tank 12, and the heating temperature is controlled to 88° C. by a steam regulating valve 9;

[0083] (3) The fully mixed solid-liquid mixture in the final mixing tank 12 enters the high-speed dispersion shear pump 16 from the bottom, and returns to the final mixing tank 12 after high-speed shearing to a certain particle size, and circulates continuously; wherein, the shear speed of the high-speed dispersion shear pump 16 is 1000rpm. The solid-liquid mixture in the final mixing tank 12 enters the screw pump from the side outlet, and then returns to the final mixing tank 12 after ultrafine grinding in the ultrafine ball mill; wherein, the ultrafine grinding mill 17 uses stainless steel balls as grinding media, and its particle size is 0.8-1.0mm. After the solid-liquid mixture is subjected to high-speed shearing and ultrafine grinding for 3h, a high QI slurry is obtained, which can be cut out of the system through the pneumatic three-way valve 18 to enter the next process; the QI content in the high QI slurry is 15%, and the particle size is less than 10μm, which can be used as a raw material to improve the QI of tar.

[0084] In the above process, all pipelines use steam companion pipes 19, and the steam in the steam pipes heats the solid-liquid mixture to 88°C.

[0085] It should be noted that those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A method for crushing, dispersing and homogenizing a solid-liquid mixture, characterized in that: The following steps are involved: (1) The coking by-products are added from the top of the primary mixing tank, fall onto the sieve plate of the primary mixing tank, and then fall into the lower layer of the primary mixing tank under the action of the scraper plate; the solvent is added from the top of the primary mixing tank and preliminarily mixed with the coking by-products in the primary mixing tank through a stirrer; (2) The solid-liquid mixture after preliminary mixing enters a grinding pump or a squeezing pump for rough crushing, and then enters a final mixing tank through a delivery pump. The solid-liquid mixture is kept in a dynamically dispersed state under the stirring action of a double-layer agitator; (3) A high-speed dispersing shear pump is used to perform high-speed shearing and crushing on the solid-liquid mixture in the final mixing tank, and an ultrafine grinder is used to perform ultrafine grinding on the solid-liquid mixture in the final mixing tank, and the solid-liquid mixture is subjected to cyclic shearing and grinding for 2 to 24 hours to obtain a high QI slurry.

2. The method for crushing, dispersing and homogenizing a solid-liquid mixture according to claim 1, characterized in that: In the step (1): The coking byproducts include one or more of asphalt dust powder, coke dust powder, ground asphalt and tar slag; and / or The solvent is one or more of tar, methyl naphthalene oil, flash oil or anthracene oil; and / or The mass ratio of the coking by-product to the solvent is 1:(1-4).

3. The method for crushing, dispersing and homogenizing a solid-liquid mixture according to claim 1, characterized in that: In the step (1): The sieve plate is provided with a plurality of sieve holes with a pore size of 8 to 20 mm; and / or The preliminary mixing is performed by heating a coil heater arranged inside the primary mixing tank, wherein the coil heater is heated by steam, and the heating temperature is controlled at 40 to 90° C. by a steam regulating valve; and / or During the preliminary mixing, the stirring speed of the stirrer is 20 to 100 rpm; and / or In the preliminary mixing, the mixing time is 3 to 24 hours.

4. The method for pulverizing, dispersing and homogenizing a solid-liquid mixture according to claim 1, characterized in that: In the step (2): The double-layer agitator is connected to a reducer, and the stirring speed of the double-layer agitator is 30 to 100 rpm; and / or The outer wall of the final mixing tank is provided with an external heater for heating. The external heater is heated by steam, and the heating temperature is controlled at 50-100° C. by a steam regulating valve.

5. The method for crushing, dispersing and homogenizing a solid-liquid mixture according to claim 1, characterized in that: In the step (3), the relative shearing speed of the rotor and stator of the high-speed dispersing shearing pump is 1000-2000 rpm; and / or The ultrafine grinding machine uses zirconium oxide balls, high-aluminum ceramic balls or stainless steel balls as grinding media, and the particle size is 0.3-1.0 mm; and / or The time of the cyclic shearing and grinding is 3 to 12 hours.

6. The method for pulverizing, dispersing and homogenizing a solid-liquid mixture according to claim 1, characterized in that: In the step (3), the QI content of the high QI slurry is 5-40%, and the particle size is less than 10 μm.

7. The method for pulverizing, dispersing and homogenizing a solid-liquid mixture according to claim 1, characterized in that: The pipeline used by the solid-liquid mixture to enter other components is provided with a steam companion pipe, and the steam temperature used in the steam companion pipe is 100-130°C.

8. A solid-liquid mixture crushing, dispersing and homogenizing system, characterized in that: It comprises a feeding device, a primary mixing tank, a final mixing tank, a high-speed dispersing shear pump and an ultrafine grinder; the feeding device is connected to the feeding port on the top of the primary mixing tank; a solvent inlet is arranged on the top of the primary mixing tank, a sieve plate, an agitator and a scraper plate are arranged in the primary mixing tank, the scraper plate is arranged above the sieve plate, the lower part of the primary mixing tank is connected to the feeding port on the top of the final mixing tank through a conveying pipeline, a grinding pump or a squeezing pump for coarsely crushing the solid-liquid mixture is arranged on the conveying pipeline, and a conveying pump is also arranged on the conveying pipeline; a first circulation inlet and a second circulation inlet are arranged on the top of the final mixing tank, The lower part is provided with a side outlet, the bottom is provided with a bottom outlet, and a double-layer agitator is provided inside; the high-speed dispersing shear pump is provided on the first circulation pipeline, and the first circulation pipeline is respectively connected to the bottom outlet and the first circulation inlet of the final mixing tank; the ultrafine grinder is provided on the second circulation pipeline, and the second circulation pipeline is respectively connected to the side outlet and the second circulation inlet of the final mixing tank, and a delivery pump is also provided on the second circulation pipeline; the first circulation pipeline and the second circulation pipeline are also provided with a three-way valve, and the three-way valve is arranged close to the first circulation inlet and the second circulation inlet; The solid-liquid mixture pulverizing, dispersing and homogenizing system is used to perform the solid-liquid mixture pulverizing, dispersing and homogenizing method as described in any one of claims 1 to 7.

9. The solid-liquid mixture pulverizing, dispersing and homogenizing system according to claim 8, characterized in that: The material discharge device comprises a receiving hopper, a screw conveyor or a bucket elevator, and a material discharge hopper which are connected in sequence; the material discharge hopper is connected to a material discharge port at the top of the primary mixing tank.

10. The solid-liquid mixture pulverizing, dispersing and homogenizing system according to claim 8, characterized in that: The scraper is mounted on the agitator.

11. The solid-liquid mixture pulverizing, dispersing and homogenizing system according to claim 8, characterized in that: A coil heater is arranged inside the primary mixing tank; the coil heater is heated by steam and is provided with a steam regulating valve.

12. The solid-liquid mixture pulverizing, dispersing and homogenizing system according to claim 8, characterized in that: The outer wall of the final mixing tank is provided with an external heater for heating; the heater is heated by steam and is provided with a steam regulating valve.

13. The solid-liquid mixture pulverizing, dispersing and homogenizing system according to claim 8, characterized in that: The delivery pipeline, the first circulation pipeline and the second circulation pipeline are all provided with steam companion pipes for heating and heat preservation.

14. The solid-liquid mixture pulverizing, dispersing and homogenizing system according to claim 8, characterized in that: The double-layer agitator is connected with a reducer.

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