CN108862357B - Barium sulfate particle size control device and method - Google Patents
Barium sulfate particle size control device and method Download PDFInfo
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- CN108862357B CN108862357B CN201811036937.9A CN201811036937A CN108862357B CN 108862357 B CN108862357 B CN 108862357B CN 201811036937 A CN201811036937 A CN 201811036937A CN 108862357 B CN108862357 B CN 108862357B
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- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
- C01F11/462—Sulfates of Sr or Ba
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Abstract
The invention relates to a barium sulfate particle size control device, which comprises a curing reaction tank, wherein a material distributor is arranged at the upper end of the curing reaction tank, a material inlet pipe communicated with the material distributor is arranged above the material distributor, and a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a fourth electromagnetic valve and a fifth electromagnetic valve are respectively connected with a control system to realize reaction systems with different particle sizes; a barium sulfate particle size control method is based on the barium sulfate particle size control device, and the reaction of different particle sizes is realized by controlling the opening and closing of an electromagnetic valve; according to the invention, different reaction systems are obtained by setting pipe diameters selected by different parameters and controlling through the electromagnetic valve, and the corresponding flow mixing devices are arranged in the corresponding reaction systems to control the reaction time, so that the barium sulfate with the required grain size can be obtained by automatically selecting different reaction systems, and the production rate of automatic production is improved.
Description
Technical Field
The invention relates to the field of chemical production, in particular to a barium sulfate particle size control device and method.
Background
The particle size of barium sulfate is an extremely important technology in the production of barium sulfate. In the application of barium sulfate in the market, the particle size has a remarkable influence on the product dispersibility, the color, the product transparency and the viscosity of an application system. Particle sizes of less than 0.4 μm are required in the production of transparent plastics, barium sulfate in the range of 0.6-0.7 μm in high gloss plastics applications, and 0.8-1.0 μm in powder coatings and paints. Secondly, the particle size distribution is also very important, and a narrow particle size distribution is a basic requirement.
For a long time, the domestic barium sulfate production adopts intermittent manual feeding operation, and the feeding state of materials in a chemical combination tank is a changing process, so that the particle size distribution is difficult to control, the particle sizes are different, and the manual intervention is difficult to realize. Therefore, the barium sulfate in China usually has the grain diameter of about 0.7-1.2 mu m, has wide grain diameter, can only be used as low-grade basic application, greatly restricts the application expansion of the barium sulfate and has low additional value.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and obtain a barium sulfate particle size control device and method.
The invention is realized by the following technical scheme:
a barium sulfate particle size control device comprises a curing reaction tank, wherein a distributing device is arranged at the upper end of the curing reaction tank, a feeding pipe communicated with the distributing device is arranged above the distributing device, the distributing device comprises a barium sulfide annular distributing device and a sodium sulfate annular distributing device, the barium sulfide annular distributing device is internally sleeved with the sodium sulfate annular distributing device, annular pipes are respectively arranged at the upper ends of the barium sulfide annular distributing device and the sodium sulfate annular distributing device, water falling ports are uniformly distributed on the annular pipes, the feeding pipe comprises a barium sulfide feeding pipe and a sodium sulfate feeding pipe, the barium sulfide feeding pipe is downwards and parallelly provided with a first barium sulfide feeding pipe, a second barium sulfide feeding pipe and a third barium sulfide feeding pipe along a feeding direction, and the sodium sulfate feeding pipe is downwards and parallelly provided with a first sodium sulfate feeding pipe and a second sodium sulfate feeding pipe along the feeding direction; wherein the content of the first and second substances,
the first barium sulfide feeding pipe is connected to a vertical deflection groove body through a fourth electromagnetic valve, the vertical deflection groove body is communicated to a curing reaction tank, the second barium sulfide feeding pipe is connected to a barium sulfide discharging pipe through a third electromagnetic valve, the barium sulfide discharging pipe is communicated to an annular pipe in a sodium sulfate annular distributor, the third barium sulfide feeding pipe is connected to the annular pipe in the barium sulfide annular distributor through a fifth electromagnetic valve, the first sodium sulfate feeding pipe is connected to the vertical deflection groove body through a second electromagnetic valve, and the second sodium sulfate feeding pipe is connected to the annular pipe in the sodium sulfate annular distributor through the first electromagnetic valve;
a plurality of baffle grooves are arranged in the vertical baffle groove body at intervals, and adjacent baffle grooves are arranged on the opposite sides of the inner wall of the vertical baffle groove body;
the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve and the fifth electromagnetic valve are respectively connected with the control system to realize reaction systems with different particle sizes.
The invention is further improved in that the diameter of the barium sulfide annular distributor is 2m, the diameter of the sodium sulfate annular distributor is 1.2m, the diameter of an annular pipe on the barium sulfide annular distributor is 50mm, the diameter of an annular pipe on the sodium sulfate annular distributor is 65mm, the diameter of a barium sulfide blanking pipe is 65mm, and the diameter of a water falling port is 20 mm.
The invention has the further improvement that 8 water falling ports are arranged on the barium sulfide annular distributing device, and 4 water falling ports are arranged on the sodium sulfate annular distributing device.
The invention is further improved in that the diversion groove is of a groove-shaped structure with a V-shaped section and a downward opening.
The invention is further improved in that a sodium sulfate feeding port is arranged on one side of the vertical baffling groove body, and a barium sulfide feeding port is arranged on the opposite side of the vertical baffling groove body.
The invention is further improved in that the diameter of the sodium sulfate feeding hole is 50mm, and the diameter of the barium sulfide feeding hole is 65 mm.
Another object of the present invention is to provide a method for controlling barium sulfate particle size, based on the above barium sulfate particle size control device, comprising the steps of:
s1, when small-particle-diameter barium sulfate is produced, the fourth electromagnetic valve is opened, barium sulfide solution enters the vertical baffling tank body from the first barium sulfide feeding pipe, the second electromagnetic valve is opened, sodium sulfate solution enters the vertical baffling tank body from the first sodium sulfate feeding pipe to carry out pre-reaction, and mixed slurry enters the curing reaction tank from the vertical baffling tank body to carry out reaction;
s2, when barium sulfate with the particle size in production is carried out, a third electromagnetic valve is opened, barium sulfide solution enters a curing reaction tank from a second barium sulfide feeding pipe through a barium sulfide discharging pipe, a second electromagnetic valve is opened, sodium sulfate solution enters the curing reaction tank from a first sodium sulfate feeding pipe through a vertical deflection groove body, and mixed slurry is reacted in the curing reaction tank;
s3, when the large-particle-diameter barium sulfate is produced, the fifth electromagnetic valve is opened, barium sulfide solution enters the annular pipe in the barium sulfide annular distributor from the third barium sulfide feeding pipe and enters the curing reaction tank through the water falling port, the first electromagnetic valve is opened, sodium sulfate solution enters the annular pipe in the sodium sulfate annular distributor through the second sodium sulfate feeding pipe and enters the curing reaction tank through the water falling port, and the mixed slurry is reacted in the curing reaction tank.
The invention is further improved in that the small-particle-size barium sulfate is barium sulfate with D50 of 0.5-0.7 μm.
The invention is further improved in that the medium-particle-size barium sulfate is barium sulfate with D50 being 0.8-1.2 μm.
The invention is further improved in that the large-particle-size barium sulfate is barium sulfate with D50 being 1.2-1.7 μm.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, different reaction systems are obtained by setting pipe diameters selected by different parameters and controlling through the electromagnetic valve, and the corresponding flow mixing devices are arranged in the corresponding reaction systems to control the reaction time, so that the barium sulfate with the required grain size can be obtained by automatically selecting different reaction systems, and the production rate of automatic production is improved.
Drawings
FIG. 1 is a schematic view of the apparatus of the present invention;
fig. 2 is an enlarged schematic structural view of a vertical baffle tank 8 in one embodiment of the present invention;
fig. 3 is a schematic structural diagram of diversion trench 81 according to an embodiment of the present invention.
In the figure: 1. the device comprises a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a fourth electromagnetic valve, a fifth electromagnetic valve, a first sodium sulfate feeding pipe, a first barium sulfide feeding pipe, a vertical baffling groove body, a baffle groove 81, a 82, a sodium sulfate feeding port 83, a barium sulfide feeding port 9, a second sodium sulfate feeding pipe, a second barium sulfide feeding pipe 10, a second barium sulfide feeding pipe 11, a third barium sulfide feeding pipe, a barium sulfide annular distributor 12, a barium sulfide annular distributor 13, a sodium sulfate annular distributor 14, a curing reaction tank 15 and a barium sulfide discharging pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1 to 2, the present invention provides a barium sulfate particle size control apparatus, including a ripening reactor 14, a distributing device is arranged at the upper end of the curing reaction tank 14, a feeding pipe communicated with the distributing device is arranged above the distributing device, the distributing device comprises a barium sulfide annular distributing device 12 and a sodium sulfate annular distributing device 13, the barium sulfide annular distributing device 12 is internally sleeved with the sodium sulfate annular distributing device 13, the upper ends of the barium sulfide annular distributing device 12 and the sodium sulfate annular distributing device 13 are respectively provided with an annular pipe, the ring pipe is evenly provided with water falling ports, the feed pipe comprises a barium sulfide feed pipe and a sodium sulfate feed pipe, the barium sulfide feeding pipe is downwards connected in parallel along the feeding direction with a first barium sulfide feeding pipe 7, a second barium sulfide feeding pipe 10 and a third barium sulfide feeding pipe 11, the sodium sulfate feeding pipe is downwards connected with a first sodium sulfate feeding pipe 6 and a second sodium sulfate feeding pipe 9 in parallel along the feeding direction; wherein the content of the first and second substances,
the first barium sulfide feeding pipe 7 is connected to a vertical deflection groove body 8 through a fourth electromagnetic valve 4, the vertical deflection groove body 8 is communicated to a curing reaction tank 14, the second barium sulfide feeding pipe 10 is connected to a barium sulfide discharging pipe 15 through a third electromagnetic valve 3, the barium sulfide discharging pipe 15 is communicated to a ring pipe in a sodium sulfate ring distributor 13, the third barium sulfide feeding pipe 11 is connected to a ring pipe in a barium sulfide ring distributor 12 through a fifth electromagnetic valve 5, the first sodium sulfate feeding pipe 6 is connected to the vertical deflection groove body 8 through a second electromagnetic valve 2, and the second sodium sulfate feeding pipe 9 is connected to a ring pipe in the sodium sulfate ring distributor 13 through a first electromagnetic valve 1;
a plurality of baffle grooves 81 are arranged in the vertical baffle groove body 8 at intervals, and the adjacent baffle grooves 81 are arranged on the opposite side of the inner wall of the vertical baffle groove body 8;
the first electromagnetic valve 1, the second electromagnetic valve 2, the third electromagnetic valve 3, the fourth electromagnetic valve 4 and the fifth electromagnetic valve 5 are respectively connected with a control system to realize reaction systems with different particle sizes.
During specific implementation, the diameter of the barium sulfide annular distributing device 12 is 2m, the diameter of the sodium sulfate annular distributing device 13 is 1.2m, the diameter of a ring-shaped pipe on the barium sulfide annular distributing device 12 is 50mm, the diameter of a ring-shaped pipe on the sodium sulfate annular distributing device 13 is 65mm, the diameter of a barium sulfide blanking pipe 15 is 65mm, and the diameter of a water falling port is 20 mm.
During specific implementation, 8 water falling ports are arranged on the barium sulfide annular distributing device 12, and 4 water falling ports are arranged on the sodium sulfate annular distributing device 13.
In specific implementation, the diversion groove 81 is a groove-shaped structure with a V-shaped section and a downward opening.
In specific implementation, a sodium sulfate feeding hole 82 is formed in one side of the vertical baffle tank body 8, and a barium sulfide feeding hole 83 is formed in the opposite side of the vertical baffle tank body.
In specific implementation, the diameter of the sodium sulfate feeding hole 82 is 50mm, and the diameter of the barium sulfide feeding hole 83 is 65 mm.
Another object of the present invention is to provide a method for controlling barium sulfate particle size, based on the above barium sulfate particle size control device, comprising the steps of:
s1, when small-particle-size barium sulfate is produced, the fourth electromagnetic valve 4 is opened, barium sulfide solution enters the vertical deflection tank body 8 from the first barium sulfide feeding pipe 7, the second electromagnetic valve 2 is opened, sodium sulfate solution enters the vertical deflection tank body 8 from the first sodium sulfate feeding pipe 6 to be pre-reacted, and mixed slurry enters the curing reaction tank 14 from the vertical deflection tank body 8 to be reacted;
s2, when barium sulfate with the particle size in production is carried out, the third electromagnetic valve 3 is opened, barium sulfide solution enters the curing reaction tank 14 from the second barium sulfide feeding pipe 10 through the barium sulfide blanking pipe 15, the second electromagnetic valve 2 is opened, sodium sulfate solution enters the curing reaction tank 14 from the first sodium sulfate feeding pipe 6 through the vertical deflection groove body 8, and the mixed slurry is reacted in the curing reaction tank;
s3, when the large-particle-diameter barium sulfate is produced, the fifth electromagnetic valve 5 is opened, barium sulfide solution enters the annular pipe in the barium sulfide annular distributor 12 through the third barium sulfide feeding pipe 11 and enters the curing reaction tank 14 through the water falling port, the first electromagnetic valve 1 is opened, sodium sulfate solution enters the annular pipe in the sodium sulfate annular distributor 13 through the second sodium sulfate feeding pipe 9 and enters the curing reaction tank 14 through the water falling port, and the mixed slurry reacts in the curing reaction tank 14.
In a specific embodiment, the small particle size barium sulfate is barium sulfate having a D50 of 0.5 to 0.7 μm.
In a specific embodiment, the medium-diameter barium sulfate particles are barium sulfate particles having a D50 of 0.8 to 1.2 μm.
In a specific embodiment, the large-particle-size barium sulfate is barium sulfate having a D50 of 1.2 to 1.7 μm.
In the above technical solution, the important control point for the barium sulfate particles with D50 ═ 0.5-0.7 μm is that the precipitation process should have a higher concentration atmosphere, i.e. a greater supersaturation degree is required. When the raw materials enter the reaction zone, more 'enclosure' of another raw material component can be obtained in time, the particle generation speed is faster, the particle growth speed is relatively slower, and the particle size is reduced. The method is mainly applied to the field of plastics. Because the particle size is smaller, the high-gloss effect is better, and the mechanical property of the plastic product can be improved.
The feeding for producing the D50-0.8-1.2 mu m barium sulfate only needs two independent feeding pipes, the inner diameter of the pipe opening is 60-70mm, the feeding pipes independently feed the combination tank, the distance between the two pipes can be set to be larger than 1.1m, and actually two independent feeding reaction systems are formed. This is because barium sulfide actually reacts with the residual sodium sulfate in the compounding tank for the point at which barium sulfide falls, and likewise reacts with the residual barium sulfide in the compounding tank for the sodium sulfate at the point at which it falls. The barium sulfate particles formed are actually formed by mixing barium sulfate particles formed by two independent reaction systems, so that the particle size obtained by the reaction is relatively wide and slightly larger. The product is mainly applied to paint and powder coating. The dispersibility and the glossiness are better.
Further reduction of the reaction rate, i.e., further reduction of the supersaturation of the starting materials upon contact, allows production of products with larger particle sizes. 8 feed openings with the aperture of 20mm are uniformly distributed on the barium sulfide feeding annular pipe, and 4 feed openings with the aperture of 20mm are uniformly distributed on the sodium sulfate feeding annular pipe. The annular pipe is arranged at the top of the combination tank, and the barium sulfide feeding pipeline is connected with the barium sulfide annular pipe. The same sodium sulfate feed pipe was connected to a sodium sulfate ring pipe. And opening the fifth electromagnetic valve 5 to add barium sulfide, and opening the first electromagnetic valve 1 to add. The sodium sulfate solution and the barium sulfide solution flow into the combination tank from a small flow passage with the diameter of 20mm, and react with the mixed slurry in the tank. Since the flow rate of each raw material is small, a lower supersaturation degree is formed in the reaction region, and thus a larger particle diameter of 1.2 to 1.7 μm can be obtained.
The working principle of the invention is as follows:
the invention adopts the following particle size research test:
1. influence of reaction temperature on particle size
The test equipment comprises an electromagnetic stirrer, a 500 ml beaker, a glass thermometer, a filter, a vacuum pump, a hundred-tex particle size distribution instrument and the like. The raw materials are barium sulfide solution and sodium sulfate solution (obtained from a barium sulfate production line).
At different temperatures, a barium sulfide solution and a sodium sulfate solution (production common concentration, sodium sulfate 25%, barium sulfide 14%), were added to a beaker with stirring for reaction, and the resultant was filtered, washed with water to neutrality, and the particle size was measured, as shown in table 1.
TABLE 1 relationship between particle size and reaction temperature
| Reaction temperature of | 55 | 65 | 75 | 85 | 90 | 95 |
| Particle size D50, micron | 0.52 | 0.53 | 0.55 | 0.52 | 0.54 | 0.56 |
The table shows that there is no direct relationship between the particle size and the reaction temperature. However, tests prove that the product dispersibility has a certain relation with the reaction temperature, and the higher the temperature is, the better the dispersibility is. Through economic comparison, the reaction temperature of 85 ℃ is selected as the temperature condition.
2. Influence of stirring speed, raw material concentration and charging sequence on particle size
2.1 influence of stirring speed
In a 500 ml beaker, a 25% sodium sulfate solution was added, followed by a 13% barium sulfide solution. The temperature was 65 ℃ and the particle size D50 at different stirring speeds is shown in Table 2, with little effect.
TABLE 2 relationship between stirring speed and particle size
| Stirring speed, rpm | 300 | 500 | 800 | 1200 |
| Particle size D50, micron | 0.58 | 0.56 | 0.57 | 0.56 |
2.2 influence of raw material concentration on particle size.
In a 500 ml beaker, the sodium sulfate solution was added first and then the barium sulfide solution was added. The temperature was 65 ℃ and the stirring speed was 800 rpm. The particle size D50 at different concentrations is shown in Table 3 and has little effect.
TABLE 3 relationship between raw material concentration and particle size
2.3 relationship between charging sequence and particle size
In a 500 ml beaker, 25% sodium sulfate solution and 13% barium sulfide solution. The temperature was 65 ℃ and the stirring speed was 800 rpm. The particle size D50 for the different sequences is shown in Table 4, with little effect.
TABLE 4 relationship between order of addition and particle size
Tests show that the stirring speed, the raw material concentration and the feeding sequence have no obvious influence on the particle size.
3. And (3) testing the feeding speed:
the particle size of the product was measured at various rates by first adding 100 ml of water to the beaker and then controlling the burette feed rate, see table 5.
TABLE 5 relationship of feed rate to particle size
(temperature 85 ℃, barium sulfide concentration 14%, sodium sulfate concentration 25%, rotation speed 1000 rpm)
Table 5 shows that the feed rate is the only factor affecting the particle size. In order to study the influence mechanism of the feeding speed, four burettes were added into the same beaker, two groups of sodium sulfate and barium sulfide were added dropwise at the same time, and the temperature and concentration were the same as those in the table above. The results are shown in Table 6.
TABLE 6 relationship between feed rate and particle size of two sets of burettes
Tests show that the number of groups of feeding pipes has no direct relation with the grain size. The mechanism affecting particle size is: the concentration atmosphere of the raw material liquid in the reaction system is first brought into contact with the atmosphere to determine the particle size, that is, the particle size is determined by the rate of formation of the precipitate at the first time. The particle size of barium sulfate can be controlled by controlling the precipitation rate.
Therefore, different feeding devices are adopted, the speed of barium sulfate precipitation is changed, and the particle size is controlled during large-scale production.
Example 1:
1. the barium sulfide solution with the concentration of 170g/L and the sodium sulfate solution with the concentration of 290g/L are adopted. At 20m3The reaction is carried out in a reaction tank with a certain volume. Stirring speed is 32 r/min;
2. the size of the vertical baffling tank body 8 is as follows: the diameter of the vertical baffling pipe is 150mm, the width of the baffling grooves 81 is 100mm, the number of layers is 4, and the spacing between the baffling grooves 81 is 120 mm;
3. opening the barium sulfide solution and sodium sulfate solution feeding valves, and simultaneously feeding the barium sulfide solution and the sodium sulfate solution into a vertical baffling tank body 8, wherein the flow rate of the barium sulfide solution is 7.5m3Flow rate of sodium sulfate,/h, 4.1m3H, charging to the volume of the chemical combination tank3/4, the slurry was filtered and the reagent was checked for the end of the reaction using sodium sulfate and barium chloride. Then, closing an excess raw material valve, and supplementing the lacking raw materials until the reaction end point;
4. the particle size of barium sulfate was measured by a laser particle size distribution analyzer, and D50 ═ 0.65 μm, D10 ═ 0.21 μm, and D90 ═ 2.45 μm.
Example 2:
1. the barium sulfide solution with the concentration of 175g/L and the sodium sulfate solution with the concentration of 300g/L are adopted and are arranged at 20m3The reaction is carried out in a reaction tank with the volume, and the stirring speed is 32 revolutions per minute;
2. the dimensions of the blanking unit used were as follows: the diameter of a vertical baffling pipe is 150mm, the width of a baffling groove 81 is 100mm, the number of layers is 4, the distance between the baffling plates is 120mm, only sodium sulfate flows through the equipment, the diameter of a barium sulfide blanking pipe 15 is 80mm, a straight pipe is used for blanking, and no other part is arranged;
3. opening the feeding valves of the barium sulfide solution and the sodium sulfate solution, wherein the flow rate of the barium sulfide solution is 8m3Flow rate of sodium sulfate,/h, 4.2m3When the materials are added to 3/4 in the volume of the combination tank, filtering the slurry, detecting whether the reaction end point is reached by adopting sodium sulfate and barium chloride, and then closing an excessive raw material valve to supplement the lacking raw materials until the reaction end point;
4. the particle size of barium sulfate was measured by a laser particle size distribution analyzer, and D50 ═ 0.95 μm, D10 ═ 0.12 μm, and D90 ═ 3.35 μm.
Example 3:
1. the barium sulfide solution with the concentration of 180g/L and the sodium sulfate solution with the concentration of 280g/L are adopted and are arranged at 20m3The reaction is carried out in a reaction tank with the volume, and the stirring speed is 32 revolutions per minute;
2. the dimensions of the blanking unit used were as follows:
barium sulfide solution annular feed tube: the diameter of the ring is 2.1m, the diameter of the pipe is 80mm, the number of the water falling holes is 8, and the aperture is 20 mm;
sodium sulfate solution annular feed tube: the diameter of the ring is 1.2m, the diameter of the pipe is 65mm, the number of the water falling holes is 4, and the aperture is 20 mm;
3. opening the barium sulfide solution and sodium sulfate solution feeding valves, and simultaneously feeding the barium sulfide solution and the sodium sulfate solution into the annular feeding pipe, wherein the flow rate of the barium sulfide solution is 7.5m3/h，Sodium sulfate flow 3.8m3When the materials are added to 3/4 in the volume of the combination tank, filtering the slurry, detecting whether the reaction end point is reached by adopting sodium sulfate and barium chloride, and then closing an excessive raw material valve to supplement the lacking raw materials until the reaction end point;
4. the particle size of barium sulfate was measured by a laser particle size distribution analyzer, and D50 ═ 1.80 μm, D10 ═ 0.40 μm, and D90 ═ 4.23 μm.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A barium sulfate particle size control device is characterized in that: the device comprises a curing reaction tank, wherein a distributing device is arranged at the upper end of the curing reaction tank, a feeding pipe communicated with the distributing device is arranged above the distributing device, the distributing device comprises a barium sulfide annular distributing device and a sodium sulfate annular distributing device, the barium sulfide annular distributing device is internally sleeved with the sodium sulfate annular distributing device, annular pipes are respectively arranged at the upper ends of the barium sulfide annular distributing device and the sodium sulfate annular distributing device, water falling ports are uniformly arranged on the annular pipes, the feeding pipe comprises a barium sulfide feeding pipe and a sodium sulfate feeding pipe, the barium sulfide feeding pipe is downwards and parallelly provided with a first barium sulfide feeding pipe, a second barium sulfide feeding pipe and a third barium sulfide feeding pipe along the feeding direction, and the sodium sulfate feeding pipe is downwards and parallelly provided with a first sodium sulfate feeding pipe and a second sodium sulfate feeding pipe along the feeding direction; wherein the content of the first and second substances,
the first barium sulfide feeding pipe is connected to a vertical deflection groove body through a fourth electromagnetic valve, the vertical deflection groove body is communicated to a curing reaction tank, the second barium sulfide feeding pipe is connected to a barium sulfide discharging pipe through a third electromagnetic valve, the barium sulfide discharging pipe is communicated to an annular pipe in a sodium sulfate annular distributor, the third barium sulfide feeding pipe is connected to the annular pipe in the barium sulfide annular distributor through a fifth electromagnetic valve, the first sodium sulfate feeding pipe is connected to the vertical deflection groove body through a second electromagnetic valve, and the second sodium sulfate feeding pipe is connected to the annular pipe in the sodium sulfate annular distributor through the first electromagnetic valve;
a plurality of baffle grooves are arranged in the vertical baffle groove body at intervals, and adjacent baffle grooves are arranged on the opposite sides of the inner wall of the vertical baffle groove body;
the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve and the fifth electromagnetic valve are respectively connected with the control system to realize reaction systems with different particle sizes.
2. The barium sulfate particle size control device according to claim 1, wherein: the diameter of the barium sulfide annular distributing device is 2m, the diameter of the sodium sulfate annular distributing device is 1.2m, the diameter of an annular pipe on the barium sulfide annular distributing device is 50mm, the diameter of an annular pipe on the sodium sulfate annular distributing device is 65mm, the diameter of a barium sulfide discharging pipe is 65mm, and the diameter of a water falling port is 20 mm.
3. The barium sulfate particle size control device according to claim 1, wherein: 8 water falling ports are formed in the barium sulfide annular distributing device, and 4 water falling ports are formed in the sodium sulfate annular distributing device.
4. The barium sulfate particle size control device according to claim 1, wherein: the diversion groove is of a groove-shaped structure with a V-shaped section and a downward opening.
5. The barium sulfate particle size control device according to claim 1, wherein: one side of the vertical baffling groove body is provided with a sodium sulfate feeding hole, and the opposite side is provided with a barium sulfide feeding hole.
6. The barium sulfate particle size control device according to claim 1, wherein: the diameter of the sodium sulfate feeding hole is 50mm, and the diameter of the barium sulfide feeding hole is 65 mm.
7. A barium sulfate particle size control method, based on any one of claims 1 to 6, characterized by comprising the steps of:
s1, when small-particle-diameter barium sulfate is produced, the fourth electromagnetic valve is opened, barium sulfide solution enters the vertical baffling tank body from the first barium sulfide feeding pipe, the second electromagnetic valve is opened, sodium sulfate solution enters the vertical baffling tank body from the first sodium sulfate feeding pipe to carry out pre-reaction, and mixed slurry enters the curing reaction tank from the vertical baffling tank body to carry out reaction;
s2, when barium sulfate with the particle size in production is carried out, a third electromagnetic valve is opened, barium sulfide solution enters a curing reaction tank from a second barium sulfide feeding pipe through a barium sulfide discharging pipe, a second electromagnetic valve is opened, sodium sulfate solution enters the curing reaction tank from a first sodium sulfate feeding pipe through a vertical deflection groove body, and mixed slurry is reacted in the curing reaction tank;
s3, when the large-particle-diameter barium sulfate is produced, the fifth electromagnetic valve is opened, barium sulfide solution enters the annular pipe in the barium sulfide annular distributor from the third barium sulfide feeding pipe and enters the curing reaction tank through the water falling port, the first electromagnetic valve is opened, sodium sulfate solution enters the annular pipe in the sodium sulfate annular distributor through the second sodium sulfate feeding pipe and enters the curing reaction tank through the water falling port, and the mixed slurry is reacted in the curing reaction tank.
8. The method for controlling barium sulfate particle size according to claim 7, wherein: the small particle size barium sulfate is barium sulfate with D50 ═ 0.5-0.7 μm.
9. The method for controlling barium sulfate particle size according to claim 7, wherein: the medium-diameter barium sulfate particles are barium sulfate particles having a D50 value of 0.8 to 1.2 [ mu ] m.
10. The method for controlling barium sulfate particle size according to claim 7, wherein: the large-particle-size barium sulfate is barium sulfate having a D50 value of 1.2 to 1.7 [ mu ] m.
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| CN111905676B (en) * | 2020-07-28 | 2022-01-18 | 帕特克(武汉)科技有限公司 | Precipitated barium sulfate continuous chemical combination reactor |
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| CN1183999A (en) * | 1996-09-26 | 1998-06-10 | 德古萨股份公司 | Process for preparation of granulated material with periodically oscillating particle size distribution |
| CN206580569U (en) * | 2017-03-10 | 2017-10-24 | 湖北谷城新和有限公司 | A kind of chemical combination device for producing narrow particle diameter distribution blanc fixe |
| CN107824133A (en) * | 2017-12-08 | 2018-03-23 | 中国科学院大连化学物理研究所 | A kind of production method of fully-automatic multi-channel precipitation method continuous production nano-powder |
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| CN1183999A (en) * | 1996-09-26 | 1998-06-10 | 德古萨股份公司 | Process for preparation of granulated material with periodically oscillating particle size distribution |
| CN206580569U (en) * | 2017-03-10 | 2017-10-24 | 湖北谷城新和有限公司 | A kind of chemical combination device for producing narrow particle diameter distribution blanc fixe |
| CN107824133A (en) * | 2017-12-08 | 2018-03-23 | 中国科学院大连化学物理研究所 | A kind of production method of fully-automatic multi-channel precipitation method continuous production nano-powder |
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