Monolithic catalyst loaded slurry production system

Abstract

The utility model belongs to the technical field of slurry preparation, and particularly relates to a loaded slurry production system of an integral catalyst. Comprising a coarse-particle-size ball mill, a coarse-particle-size vibrating screen, a medium-particle-size ball mill, a medium-particle-size vibrating screen, a small-particle-size ball mill and a small-particle-size vibrating screen, wherein the coarse-particle-size vibrating screen is arranged below a discharge port of the coarse-particle-size ball mill; the medium-particle-size ball mill is connected above the coarse-particle-size vibrating screen; a small-particle-size ball mill is connected above the small-particle-size vibrating screen, the coarse-particle-size vibrating screen, the medium-particle-size vibrating screen and the small-particle-size vibrating screen are connected below a slurry kettle through an ultrasonic dispersion device, and a carbon powder feeding device and a kettle wall purging device are arranged on the slurry kettle. The three ball mills with different particle size parameters and the vibrating screen are combined for use, the medium-particle-size ball mill and the small-particle-size ball mill only need to grind materials with unqualified particle sizes after being ground by the previous ball mill, and large raw materials of metal particles do not need to be ground, so that the efficiency is greatly improved, and the energy consumption is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of slurry preparation, and in particular relates to a production system of a loaded slurry of an integral catalyst. Background Art

[0002] Monolithic catalysts are highly efficient and compact catalytic materials that are widely used in the chemical industry, especially in areas that require efficient catalytic conversion and good heat conduction. This type of catalyst is usually composed of a carrier material and an active component, where the active component is mostly loaded on the carrier in the form of metal particles. In the preparation of the loaded slurry of the monolithic catalyst, metal particles of different particle sizes are selected for mixing in order to optimize the performance and service life of the catalyst. This is because the particle size of the metal particles has a significant effect on the catalytic activity, selectivity and stability. By rationally matching metal particles of different particle sizes, a catalyst with an ideal pore structure and active sites can be constructed, thereby improving the catalytic efficiency.

[0003] However, in the actual preparation process, a tricky problem is that metal particles of different particle sizes need to be ground and screened separately in ball mills with different parameter settings. These parameters include the size of the grinding balls in the ball mill, the rotation speed, the grinding time, etc., which together determine the grinding efficiency and the uniformity of the particle size distribution. Since metal particles of different particle sizes have different requirements for grinding conditions, they need to be processed separately in multiple ball mills, which undoubtedly reduces production efficiency and increases production costs. What's more tricky is that in order to achieve the desired particle size distribution, repeated grinding and screening are often required, which is not only time-consuming and labor-intensive, but may also cause unnecessary damage to the metal particles, affecting their catalytic performance.

[0004] In addition, in the preparation process of the loaded slurry, in order to further improve the loading capacity and catalytic efficiency of the monolithic catalyst, a certain amount of carbon powder is usually added as a carrier or additive. Carbon powder has good electrical conductivity and chemical stability, and can significantly improve the active surface area and durability of the catalyst. However, in the process of adding carbon powder, due to its fine particles and high surface energy, it is very easy to adhere to the wall of the kettle. This not only causes a waste of raw materials, but also may lead to uneven slurry composition, thereby affecting the performance of the final catalyst. Therefore, how to effectively prevent the adhesion of carbon powder during the addition process is also a key technical problem that needs to be solved in the current preparation of monolithic catalyst loaded slurry.

[0005] In summary, the existing integrated catalyst-loaded slurry production system faces many challenges in processing metal particles of different sizes and adding carbon powder. A solution is urgently needed to optimize the production process, improve production efficiency, and ensure the performance and quality of the catalyst. Utility Model Content

[0006] The utility model provides an integral catalyst loading slurry production system to solve the problems of low efficiency in processing metal particles with different particle sizes and carbon powder feeding sticking to the kettle wall.

[0007] In order to solve the above problems, the technical solution of the utility model is:

[0008] The utility model discloses a system for producing a loaded slurry of an integral catalyst, comprising a coarse-particle-size ball mill, a coarse-particle-size vibrating screen being obliquely arranged below the discharge port of the coarse-particle-size ball mill, a feed port of a medium-particle-size ball mill being connected above the coarse-particle-size vibrating screen, a medium-particle-size vibrating screen being obliquely arranged below the discharge port of the medium-particle-size ball mill, a feed port of a small-particle-size ball mill being connected above the medium-particle-size vibrating screen, a small-particle-size vibrating screen being obliquely arranged below the discharge port of the small-particle-size ball mill, a feed port of a small-particle-size ball mill being connected above the small-particle-size vibrating screen, a feed port of an ultrasonic dispersion device being connected below the coarse-particle-size vibrating screen, the medium-particle-size vibrating screen and the small-particle-size vibrating screen, a solvent pipeline being arranged on the ultrasonic dispersion device, the ultrasonic dispersion device being connected to a slurry kettle, a carbon powder feeding device and a binder feeding pipeline being arranged on the slurry kettle, and a kettle wall blowing device being arranged above the slurry kettle.

[0009] Large metal particles enter the coarse-particle ball mill for grinding, the outlet material of the coarse-particle ball mill is screened by the coarse-particle vibration screen, and the coarse-particle metal enters the feed port of the ultrasonic dispersion device. The metal particles that do not pass through the screen at the top of the coarse-particle vibration screen enter the medium-particle ball mill for further grinding, the outlet material of the medium-particle ball mill is screened by the medium-particle vibration screen, and the medium-particle metal enters the feed port of the ultrasonic dispersion device. The metal particles that do not pass through the screen at the top of the medium-particle vibration screen enter the small-particle ball mill for further grinding, the outlet material of the small-particle ball mill is screened by the small-particle vibration screen, and the small-particle metal enters the feed port of the ultrasonic dispersion device. The metal particles that do not pass through the screen at the top of the small-particle vibration screen are transported back to the feed port of the small-particle ball mill for repeated grinding.

[0010] The combination of three ball mills with different particle size parameters and vibrating screens of corresponding specifications can make the production process of metal particles of different particle sizes more consistent. The medium-size ball mill only needs to grind the unqualified part of the material after grinding in the coarse-size ball mill, and the small-size ball mill only needs to grind the unqualified part of the material after grinding in the medium-size ball mill. There is no need to grind separately from the bulk raw materials of the metal particles, which greatly improves efficiency and saves energy.

[0011] The kettle wall purge device comprises a horizontally arranged annular pipeline, a plurality of branch pipelines are arranged below the annular pipeline and inclined downward toward the slurry kettle wall, and a solvent pressurizing pipeline and a nitrogen pipeline are arranged on the annular pipeline.

[0012] A pressure pump is provided on the solvent pressure pipeline.

[0013] The solvent pressurizing pipeline and the nitrogen pipeline are respectively provided with solenoid valves.

[0014] After adding carbon powder into the slurry kettle, first open the pressure pump and the solenoid valve on the solvent pressure pipeline, pump the solvent into the ring pipeline through the solvent pressure pipeline, distribute it to each branch pipeline through the ring pipeline, carry the pressure and spray it downward along the inner wall of the slurry kettle, soak the carbon powder and flush it downward, then close the solenoid valve on the solvent pressure pipeline, open the solenoid valve on the nitrogen pipeline, and blow the nitrogen through the ring pipeline and each branch pipeline along the inner wall of the slurry kettle, blowing the solvent droplets carrying carbon powder into the slurry below to prevent the solvent and carbon powder from sticking to the wall and causing waste of raw materials.

[0015] The port at the bottom of the branch pipeline is close to the inner wall of the slurry kettle.

[0016] A stirring device is arranged in the slurry kettle.

[0017] Working principle:

[0018] The large metal particles enter the coarse particle size ball mill for grinding. The outlet material of the coarse particle size ball mill is screened by the coarse particle size vibrating screen and the coarse particle size metal enters the feed port of the ultrasonic dispersion device. The metal particles that do not pass through the screen at the top of the coarse particle size vibrating screen enter the medium particle size ball mill for further grinding. The outlet material of the medium particle size ball mill is screened by the medium particle size vibrating screen and the medium particle size metal enters the feed port of the ultrasonic dispersion device. The metal particles that do not pass through the screen at the top of the medium particle size vibrating screen enter the small particle size ball mill for further grinding. The outlet material of the small particle size ball mill is screened by the small particle size vibrating screen and the small particle size metal enters the feed port of the ultrasonic dispersion device. The metal particles that do not pass through the screen at the top of the small particle size vibrating screen are transported back to the feed port of the small particle size ball mill for repeated grinding. The valve on the solvent pipeline on the ultrasonic dispersion device is opened, and metal particles of different particle sizes are In the presence of solvent, ultrasonic dispersion is performed in an ultrasonic dispersion device to make the metal particles of three particle sizes more evenly dispersed, and then the solid-liquid mixture is transported to the slurry kettle, and carbon powder is added to the slurry kettle through a carbon powder feeding device. After the carbon powder is added to the slurry kettle, the pressure pump and the solenoid valve on the solvent pressure pipeline are first opened, and the solvent is pumped into the annular pipeline through the solvent pressure pipeline, and distributed to each branch pipeline through the annular pipeline, and the pressure is carried downward along the inner wall of the slurry kettle to spray the carbon powder and wash it downward, and then the solenoid valve on the solvent pressure pipeline is closed, and the solenoid valve on the nitrogen pipeline is opened, and the nitrogen is swept downward along the inner wall of the slurry kettle through the annular pipeline and each branch pipeline, and the solvent droplets carrying carbon powder are blown into the slurry below to prevent the solvent and carbon powder from sticking to the wall and causing a waste of raw materials. The stirring device in the slurry kettle is opened, and under stirring, the valve on the binder feeding pipeline is opened, and the binder is added to the slurry kettle to form a viscous monolithic catalyst slurry.

[0019] The beneficial effects of the utility model are as follows:

[0020] (1) The utility model can make the production process of metal particles of different particle sizes more consistent by combining three ball mills with parameters of different particle sizes and vibrating screens of corresponding specifications. The medium-particle-size ball mill only needs to grind the unqualified part of the material after grinding by the coarse-particle-size ball mill, and the small-particle-size ball mill only needs to grind the unqualified material after grinding by the medium-particle-size ball mill. There is no need to grind the large pieces of raw materials of metal particles separately, which greatly improves efficiency and saves energy consumption.

[0021] (2) After the utility model adds carbon powder into the slurry kettle, the pressure pump and the solenoid valve on the solvent pressure pipeline are first opened, and the solvent is pumped into the annular pipeline through the solvent pressure pipeline, and distributed to each branch pipeline through the annular pipeline. The pressure is carried and sprayed downward along the inner wall of the slurry kettle, so that the carbon powder is soaked and flushed downward. Then the solenoid valve on the solvent pressure pipeline is closed, and the solenoid valve on the nitrogen pipeline is opened. The nitrogen is blown downward along the inner wall of the slurry kettle through the annular pipeline and each branch pipeline, and the solvent droplets carrying the carbon powder are blown into the slurry below, so as to prevent the solvent and carbon powder from sticking to the wall and causing waste of raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. In the accompanying drawings:

[0023] Figure 1 It is a structural schematic diagram of the supported slurry production system of the monolithic catalyst of the utility model;

[0024] Figure 2 It is a structural schematic diagram of the kettle wall blowing and cleaning device described in the utility model;

[0025] In the figure: 1. coarse particle size ball mill; 2. coarse particle size vibrating screen; 3. medium particle size ball mill; 4. medium particle size vibrating screen; 5. small particle size ball mill; 6. small particle size vibrating screen; 7. ultrasonic dispersion device; 8. solvent pipeline; 9. slurry kettle; 10. kettle wall cleaning device; 1001. solvent pressurizing pipeline; 1002. nitrogen pipeline; 1003. branch pipeline; 1004. ring pipeline; 11. binder feeding pipeline; 12. carbon powder feeding device. DETAILED DESCRIPTION

[0026] The present invention will be described in detail below in conjunction with the embodiments.

[0027] Example 1

[0028] like Figure 1-2As shown, the loaded slurry production system of the monolithic catalyst comprises a coarse-particle-size ball mill 1, a coarse-particle-size vibrating screen 2 is obliquely arranged below the discharge port of the coarse-particle-size ball mill 1, a feed port of a medium-particle-size ball mill 3 is connected above the coarse-particle-size vibrating screen 2, a medium-particle-size vibrating screen 4 is obliquely arranged below the discharge port of the medium-particle-size ball mill 3, a feed port of a small-particle-size ball mill 5 is connected above the medium-particle-size vibrating screen 4, a small-particle-size vibrating screen 6 is obliquely arranged below the discharge port of the small-particle-size ball mill 5, a feed port of the small-particle-size ball mill 5 is connected above the small-particle-size vibrating screen 6, a feed port of an ultrasonic dispersion device 7 is connected below the coarse-particle-size vibrating screen 2, the medium-particle-size vibrating screen 4 and the small-particle-size vibrating screen 6, a solvent pipeline 8 is arranged on the ultrasonic dispersion device 7, the ultrasonic dispersion device 7 is connected to a slurry kettle 9, a carbon powder feeding device 12 and a binder feeding pipeline 11 are arranged on the slurry kettle 9, and a kettle wall purge device 10 is arranged above the slurry kettle 9.

[0029] The bulk metal particles enter the coarse-particle ball mill 1 for grinding, the outlet material of the coarse-particle ball mill 1 is screened by the coarse-particle vibrating screen 2 to obtain the coarse-particle metal and enter the feed port of the ultrasonic dispersion device 7, the metal particles at the top of the coarse-particle vibrating screen 2 that have not passed through the screen enter the medium-particle ball mill 3 for further grinding, the outlet material of the medium-particle ball mill 3 is screened by the medium-particle vibrating screen 4 to obtain the medium-particle metal and enter the feed port of the ultrasonic dispersion device 7, the metal particles at the top of the medium-particle vibrating screen 4 that have not passed through the screen enter the small-particle ball mill 5 for further grinding, the outlet material of the small-particle ball mill 5 is screened by the small-particle vibrating screen 6 to obtain the small-particle metal and enter the feed port of the ultrasonic dispersion device 7, and the metal particles at the top of the small-particle vibrating screen 6 that have not passed through the screen are transported back to the feed port of the small-particle ball mill 5 for repeated grinding.

[0030] The combination of three ball mills with different particle size parameters and vibrating screens of corresponding specifications can make the production process of metal particles with different particle sizes more consistent. The medium-size ball mill 3 only needs to grind the unqualified part of the material after grinding by the coarse-size ball mill 1, and the small-size ball mill 5 only needs to grind the unqualified part of the material after grinding by the medium-size ball mill 3. There is no need to grind separately from the bulk raw materials of the metal particles, which greatly improves efficiency and saves energy consumption.

[0031] The kettle wall purge device 10 comprises a horizontally arranged annular pipeline 1004 , a plurality of branch pipelines 1003 are arranged below the annular pipeline 1004 , slanting downward toward the wall of the slurry kettle 9 , and a solvent pressurizing pipeline 1001 and a nitrogen pipeline 1002 are arranged on the annular pipeline 1004 .

[0032] The solvent pressurizing pipeline 1001 is provided with a pressurizing pump.

[0033] The solvent pressurizing pipeline 1001 and the nitrogen pipeline 1002 are respectively provided with solenoid valves.

[0034] After adding carbon powder into the slurry kettle 9, first open the pressure pump and the solenoid valve on the solvent pressure pipeline 1001, pump the solvent into the annular pipeline 1004 through the solvent pressure pipeline 1001, distribute it to each branch pipeline 1003 through the annular pipeline 1004, carry the pressure and spray it obliquely downward along the inner wall of the slurry kettle 9, soak the carbon powder and flush it downward, then close the solenoid valve on the solvent pressure pipeline 1001, open the solenoid valve on the nitrogen pipeline 1002, and blow the nitrogen through the annular pipeline 1004 and each branch pipeline 1003 obliquely downward along the inner wall of the slurry kettle 9, and blow the solvent droplets carrying carbon powder into the slurry below to prevent the solvent and carbon powder from sticking to the wall and causing waste of raw materials.

[0035] The port at the bottom of the branch pipeline 1003 is close to the inner wall of the slurry kettle 9.

[0036] The slurry kettle 9 is provided with a stirring device.

[0037] Working principle:

[0038] The bulk metal particles enter the coarse particle size ball mill 1 for grinding. The coarse particle size metal separated by the coarse particle size vibrating screen 2 at the outlet of the coarse particle size ball mill 1 enters the feed port of the ultrasonic dispersion device 7. The metal particles that do not pass through the screen at the top of the coarse particle size vibrating screen 2 enter the medium particle size ball mill 3 for further grinding. The medium particle size metal separated by the medium particle size vibrating screen 4 at the outlet of the medium particle size ball mill 3 enters the feed port of the ultrasonic dispersion device 7. The metal particles that do not pass through the screen at the top of the medium particle size vibrating screen 4 enter the small particle size ball mill 5 for further grinding. The small particle size metal separated by the small particle size vibrating screen 6 at the outlet of the small particle size ball mill 5 enters the feed port of the ultrasonic dispersion device 7. The metal particles that do not pass through the screen at the top of the small particle size vibrating screen 6 are transported back to the feed port of the small particle size ball mill 5 for repeated grinding. The valve on the solvent pipeline 8 on the ultrasonic dispersion device 7 is opened. Metal particles of different particle sizes are separated by the ultrasonic separation in the presence of the solvent. Ultrasonic dispersion is performed in the dispersion device 7 to make the metal particles of three particle sizes more evenly dispersed, and then the solid-liquid mixture is transported to the slurry kettle 9, and carbon powder is added to the slurry kettle 9 through the carbon powder feeding device 12. After the carbon powder is added to the slurry kettle 9, the pressure pump and the solenoid valve on the solvent pressurizing pipeline 1001 are opened first, and the solvent is pumped into the annular pipeline 1004 through the solvent pressurizing pipeline 1001, and distributed to each branch pipeline 1003 through the annular pipeline 1004, and the pressure is carried downward along the inner wall of the slurry kettle 9 to infiltrate the carbon powder and flush it downward, and then the solenoid valve on the solvent pressurizing pipeline 1001 is closed, and the solenoid valve on the nitrogen pipeline 1002 is opened. Nitrogen is blown obliquely downward along the inner wall of the slurry kettle 9 through the annular pipeline 1004 and each branch pipeline 1003, and the solvent droplets carrying carbon powder are blown into the slurry below to prevent the solvent and carbon powder from sticking to the wall and causing waste of raw materials. The stirring device in the slurry kettle 9 is turned on. Under stirring, the valve on the binder feeding pipeline 11 is opened to add the binder into the slurry kettle 9 to form a viscous monolithic catalyst slurry.

Claims

1. A system for producing a monolithic catalyst supported slurry, characterized in that: The invention comprises a coarse particle size ball mill (1), a coarse particle size vibrating screen (2) is arranged obliquely below the discharge port of the coarse particle size ball mill (1), a feed port of a medium particle size ball mill (3) is connected above the coarse particle size vibrating screen (2), a medium particle size vibrating screen (4) is arranged obliquely below the discharge port of the medium particle size ball mill (3), a feed port of a small particle size ball mill (5) is connected above the medium particle size vibrating screen (4), a small particle size vibrating screen (6) is arranged obliquely below the discharge port of the small particle size ball mill (5), and a small particle size vibrating screen (6) is connected above the small particle size vibrating screen (6). The feed inlet of the small-particle ball mill (5), the coarse-particle vibration screen (2), the medium-particle vibration screen (4), and the small-particle vibration screen (6) are connected to the feed inlet of the ultrasonic dispersion device (7), the ultrasonic dispersion device (7) is provided with a solvent pipeline (8), the ultrasonic dispersion device (7) is connected to the slurry kettle (9), the slurry kettle (9) is provided with a carbon powder feeding device (12) and a binder feeding pipeline (11), and the upper part of the slurry kettle (9) is provided with a kettle wall purge device (10).

2. The system for producing a supported slurry of a monolithic catalyst according to claim 1, characterized in that: The kettle wall purge device (10) comprises a horizontally arranged annular pipeline (1004), a plurality of branch pipelines (1003) are arranged below the annular pipeline (1004) and inclined downward toward the wall of the slurry kettle (9), and a solvent pressurizing pipeline (1001) and a nitrogen pipeline (1002) are arranged on the annular pipeline (1004).

3. The system for producing a supported slurry of a monolithic catalyst according to claim 2, characterized in that: The solvent pressurizing pipeline (1001) is provided with a pressurizing pump.

4. The system for producing a supported slurry of a monolithic catalyst according to claim 2, characterized in that: The solvent pressurizing pipeline (1001) and the nitrogen pipeline (1002) are respectively provided with solenoid valves.

5. The system for producing a supported slurry of a monolithic catalyst according to claim 2, characterized in that: The port at the bottom of the branch pipeline (1003) is close to the inner wall of the slurry kettle (9).

6. The system for producing a supported slurry of a monolithic catalyst according to claim 1, characterized in that: The slurry kettle (9) is provided with a stirring device.

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