CN115554958A - System and method capable of continuously controlling production of barium sulfate with different particle sizes - Google Patents
System and method capable of continuously controlling production of barium sulfate with different particle sizes Download PDFInfo
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Abstract
The invention discloses a system and a method capable of continuously controlling and producing barium sulfate with different particle sizes, wherein a sodium sulfate liquid storage tank is communicated with the side wall of a barium sulfate particle size control reactor through a first feeding pipe after sequentially passing through a first conveying pump and a first electric control valve, a barium sulfide liquid storage tank is communicated with the side wall of the barium sulfate particle size control reactor through a second feeding pipe after sequentially passing through a second conveying pump and a second electric control valve, a stirring device is installed in the barium sulfate particle size control reactor, a slurry discharge port at the lower end of the barium sulfate particle size control reactor is communicated with a hose, the hose is installed on an adjustable sleeve, and the adjustable sleeve is installed on an automatic lifting device. According to the invention, through a DCS control system, the hedging reaction is realized by using a static pipeline, the liquid level height is regulated and controlled, the barium sulfate crystal nucleus formation stage, the growth stage and the coalescence and agglomeration stage are regulated and controlled, and barium sulfate materials with different particle sizes and narrow distribution are continuously, quickly and automatically produced aiming at barium sulfate products with different purposes.
Description
Technical Field
The invention belongs to the field of barium sulfate production, and particularly relates to a system and a method capable of continuously controlling production of barium sulfate with different particle sizes.
Background
Barium sulfate has the advantages of strong chemical inertia, good stability, acid and alkali resistance, moderate hardness, high whiteness, high gloss, capability of absorbing harmful x and gamma rays and the like. Barium sulfate is an environment-friendly functional material, and can be used as a functional filler to be widely applied to the fields of various coatings, electronic ink, printing ink, color paste, modified plastics, optical films, lithium battery diaphragms, transparent enhanced functional master batches, degradable plastics, color master batches, rubber elastomers, papermaking, cosmetics and the like. It can also be used as swallowing agent (named barium meal) for seeing stomach and intestine, cathode expansion rod of accumulator, glaze material for making ceramic and enamel, surface coating agent of printing paper and copper plate paper, sizing agent in textile industry, clarifying agent of glass product, protective wall material for preventing radioactive rays, sound-insulating material for insulating noise, medical developing fiber and children toy.
The application fields of the precipitated barium sulfate are wide, but the quality requirements of different fields on the precipitated barium sulfate are different greatly. For example: the product is used as the filler of PCB printing ink, and has the advantages of small particle size, stable color, high oil absorption, good dispersibility, and scraper fineness of about 10 μm; the modified silicon dioxide is used as a composite material filler such as rubber, and has the effects of wear resistance and the like, wherein the smaller the particle size is, the larger the reinforcing effect is. If the product is used as a filler of ink paste, the particle size is required to reach the nanometer level, the color is stable, the oil absorption is high, the dispersibility is good, and the grinding fineness is about 2 mu m so as to improve the color rendering property and thixotropy of the product; for the light diffusion industry, high whiteness is required, and the particle size is not suitable to be too small, about 2-5 μm, because too small particle size can easily transmit light and cannot play a role in light scattering.
Then, most of the domestic barium sulfate production at present adopts a plurality of chemical combination tanks, and the intermittent manual feeding operation is carried out, so that the reaction conditions of materials in different chemical combination tanks are completely different, the prepared barium sulfate has different particle sizes, the average particle size is 0.6-1.8 mu m, the distribution range is wide, the uniformity is poor, the fineness of a scraper is large, the dispersion is poor, and the light can be scattered, thereby limiting the application of the barium sulfate.
During the reaction process of generating barium sulfate precipitate, the morphology and particle size distribution of the precipitated particles are mainly controlled by three stages: a nucleation phase, a nucleation growth phase, a coalescence and agglomeration phase, which compete with each other and occur continuously. Due to precipitation of BaSO 4 The solubility product constant is extremely small (25 ℃, ksp = 1.1X10) -10 ) When Ba 2+ With SO4 2- When they meet, a large number of primary particles (crystal nuclei) are instantaneously generated, theoretically contributing to obtaining fine-sized crystal grains. However, because the specific surface area of the fine crystal grains is extremely large, adjacent crystal grains are easy to aggregate and even hard to agglomerate, the obtained product has wider particle size distribution and no fixed morphology, and the particle size and the distribution range of the sulfuric acid are uncontrollable. At present, few research achievements are made in the aspect of barium sulfate particle size control in China, and patent document CN108862357 discloses that a material distributor is arranged at the upper end of a chemical combination reaction tank, five feeding pipes communicated with the material distributor are arranged above the material distributor, an electromagnetic valve is arranged on each feeding pipe, and the reaction of different particle sizes is realized by opening and closing the electromagnetic valves. The method needs to repeatedly debug and is very unstable when barium sulfate with different particle sizes is produced, and industrial automatic and continuous production is difficult to realize.
Disclosure of Invention
In order to solve the technical problems, the invention provides a system and a method for continuously controlling and producing barium sulfate with different particle sizes.
The invention mainly adopts the technical scheme that:
the utility model provides a but system of continuous control production different particle size barium sulfate, includes barium sulfate particle size control reactor, sodium sulfate liquid storage tank, first delivery pump, first electric control valve, first inlet pipe, barium sulfide liquid storage tank, second delivery pump, second electric control valve, second inlet pipe, agitating unit, hose, adjustable sleeve pipe, automatic lifting device and DCS control system, the discharge gate of sodium sulfate liquid storage tank pass through first inlet pipe and the lateral wall intercommunication of barium sulfate particle size control reactor after first delivery pump and first electric control valve in proper order, the discharge gate of barium sulfide liquid storage tank pass through second delivery pump and second electric control valve after through second delivery pump and barium sulfate particle size control reactor lateral wall intercommunication, second inlet pipe and first inlet pipe are located barium sulfate particle size control reactor, and the second inlet pipe is located first inlet pipe top, agitating unit installs in the barium sulfate particle size control reactor, the lower extreme of barium sulfate particle size control reactor is equipped with the thick liquid discharge gate with the hose intercommunication, the hose is installed on adjustable sleeve pipe, adjustable sleeve pipe is installed at automatic lifting device's the same one side, stirring unit is installed in barium sulfate particle size control reactor, the vertical lift control pump is connected through first electric control pump, the automatic lifting device and the vertical transport pump and transport pump.
Preferably, agitating unit includes agitator motor, transmission, (mixing) shaft and stirring vane, agitator motor and transmission are all installed the top of barium sulfate particle size control reactor, agitator motor's output with transmission's input is connected, transmission's output with the one end of (mixing) shaft is connected, the (mixing) shaft is installed in barium sulfate particle size control reactor center department, be equipped with a plurality of layers of stirring vane on the (mixing) shaft.
Preferably, be equipped with two-layer stirring vane about on the (mixing) shaft, just lower floor's stirring vane is close to the (mixing) shaft bottom, just lower floor's stirring vane's stirring inclination 5, the direction is upwards, upper stirring vane is located lower floor's stirring vane top, just upper stirring vane's stirring inclination 5, the direction is downwards, just upper stirring vane's length is greater than lower floor's stirring vane length.
Preferably, the discharge gate that first inlet pipe is located barium sulfate particle diameter control reactor adopts the elbow design, and the discharge gate up, the discharge gate that the second inlet pipe is located barium sulfate particle diameter control reactor adopts the elbow design, and the discharge gate down, the discharge gate upper end of second inlet pipe still is equipped with the DN80 flange, carries out the blind plate shutoff.
Preferably, the vertical direction interval of first inlet pipe and second inlet pipe is 400mm, the vertical direction interval of the discharge gate of first inlet pipe and the discharge gate of second inlet pipe is 300mm.
Preferably, the bottom end of the barium sulfate particle size control reactor is of a conical funnel structure, and the slurry discharge port is arranged in the center of the bottom end of the conical funnel structure.
A method for continuously controlling and producing barium sulfate with different particle sizes comprises the following specific steps:
step 1: respectively assembling the prepared barium sulfide liquid and sodium sulfate liquid with different solution concentrations in a barium sulfide liquid storage tank and a sodium sulfate liquid storage tank;
and 2, step: according to a mol ratio of 1:1, respectively setting the flow rates of barium sulfide liquid and sodium sulfate liquid, and simultaneously respectively controlling the flow rates of the sodium sulfate liquid and the barium sulfide liquid by a DCS (distributed control System) through a first conveying pump and a second conveying pump;
and step 3: according to the particle size and the distribution range of barium sulfate to be produced, a DCS control system controls an automatic lifting device to drive a hose arranged on an adjustable sleeve to move up and down, the liquid level of barium sulfate slurry in a barium sulfate particle size control reactor is adjusted, and different reaction atmospheres are formed;
and 4, step 4: and controlling the stirring speed of the stirring device by the DCS control system, and stirring the barium sulfate slurry in the barium sulfate particle size control reactor until the reaction is finished.
Preferably, when the flow rate of 190g/l barium sulfide liquid and 300g/l sodium sulfate liquid is 1.5m/s, the height of the liquid surface of the barium sulfate slurry is less than or equal to 600mm, and the stirring speed of the barium sulfate slurry is 40r/min, the particle diameter D of the produced barium sulfate 50 ≥2.0μm。
Preferably, when the flow rate of the barium sulfate liquid and the sodium sulfate liquid is 2.0m/s, the height of the liquid level of the barium sulfate slurry is less than or equal to 150mm, and the stirring speed of the barium sulfate slurry is 60r/min, the particle size D of the generated barium sulfate is 50 The range is 0.7-1.0 μm.
Preferably, when 1.0 percent of anionic dispersant is added into the barium sulfide liquid, the flow rate of the barium sulfide liquid and the sodium sulfate liquid is 3.0m/s, the height of the liquid level of the barium sulfate slurry is less than or equal to 100mm, and the stirring speed of the barium sulfate slurry is 80r/min, the particle size of the generated nano barium sulfate is D 50 The range is 150-400nm.
Has the beneficial effects that: the invention provides a system and a method for continuously controlling and producing barium sulfate with different particle sizes, which have the following advantages:
(1) The invention has the characteristics of simple structure, low failure rate, difficult blockage, high automation degree, continuous production and the like.
(2) The invention controls the liquid level of barium sulfate slurry, the flow rate of sodium sulfate and barium sulfide liquid and the stirring speed of the slurry through the DCS control system, can produce nano-scale barium sulfate and coarse grain size barium sulfate used in the photodiffusion industry, and can controllably adjust the grain size of the barium sulfate aiming at barium sulfate with different purposes.
(3) Compared with an intermittent tank type reaction method, the method can realize remote control, is favorable for automatic and continuous production, is convenient to adjust, has controllable particle size and narrow distribution range.
(4) The system adopts the device miniaturization design, each reactor operates independently, and can be flexibly increased and decreased according to the production capacity requirement, and if the production needs to be expanded, the yield can be quickly increased by connecting a plurality of reactors in parallel.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention (DCS control system not shown);
FIG. 2 is a graph showing a particle size distribution of barium sulfate (coarse particles) in example 1;
FIG. 3 is a particle size distribution diagram of barium sulfate (fine particles) in example 2;
FIG. 4 is a scanning electron micrograph of the nano-barium sulfate in example 3;
in the figure: the device comprises a barium sulfate particle size control reactor 1, a slurry discharge port 1-1, a sodium sulfate liquid storage tank 2, a first delivery pump 3, a first electric control valve 4, a first feed pipe 5, a barium sulfide liquid storage tank 6, a second delivery pump 7, a second electric control valve 8, a second feed pipe 9, a DN80 flange 9-1, a stirring motor 10-1, a transmission device 10-2, a stirring shaft 10-3, a stirring blade 10-5, a hose 11, an adjustable sleeve 12 and an automatic lifting device 13.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
A system capable of continuously controlling and producing barium sulfate with different particle sizes comprises a barium sulfate particle size control reactor 1, a sodium sulfate liquid storage tank 2, a first delivery pump 3, a first electric control valve 4, a first feeding pipe 5, a barium sulfide liquid storage tank 6, a second delivery pump 7, a second electric control valve 8, a second feeding pipe 9, a stirring device, a hose 11, an adjustable sleeve 12, an automatic lifting device 13 and a DCS control system, the discharge hole of the sodium sulfate liquid storage tank 2 is communicated with the side wall of the barium sulfate particle size control reactor 1 through a first feed pipe 5 after sequentially passing through a first delivery pump 3 and a first electric control valve 4, the discharge hole of the barium sulfide liquid storage tank 6 is communicated with the side wall of the barium sulfate particle size control reactor 1 through a second feeding pipe 9 after passing through a second delivery pump 7 and a second electric control valve 8 in sequence, the second feeding pipe 9 and the first feeding pipe 5 are positioned at the same side of the barium sulfate particle size control reactor 1, and the second feeding pipe 9 is positioned above the first feeding pipe 5, the stirring device is arranged in the barium sulfate particle size control reactor 1, the bottom end of the barium sulfate particle size control reactor 1 is of a conical funnel structure, a slurry discharge port 1-1 is arranged at the center of the bottom end of the conical funnel structure, the slurry outlet 1-1 is communicated with the hose 11, the hose 11 is arranged on an adjustable sleeve 12, the adjustable sleeve 12 is arranged at the lifting end of the automatic lifting device 13 and moves up and down along the vertical direction, the first electric control valve 4, the first delivery pump 3, the second electric control valve 8, the second delivery pump 7, the stirring motor 10-1 of the stirring device and the automatic lifting device 13 are connected with the DCS control system in a control mode through remote data transmission.
The stirring device comprises a stirring motor 10-1, a transmission device 10-2, a stirring shaft 10-3 and stirring blades 10-5, wherein the stirring motor 10-1 and the transmission device 10-2 are both installed at the top end of the barium sulfate particle size control reactor 1, the output end of the stirring motor 10-1 is connected with the input end of the transmission device 10-2, the output end of the transmission device 10-2 is connected with one end of the stirring shaft 10-3, the stirring shaft 10-3 is installed at the center in the barium sulfate particle size control reactor 1, and the stirring shaft 10-3 is provided with an upper layer of stirring blades and a lower layer of stirring blades.
In the present invention, the diameter of the barium sulfate particle size control reactor is 1300mm, the height thereof is 1800mm, and the volume of the barium sulfate particle size control reactor is about 2.38m 3 ；
The diameter of the first feeding pipe 5 (sodium sulfate solution) is 50mm, the height of the first feeding pipe 5 from the bottom of the barium sulfate particle size control reactor 1 is 100mm, the first feeding pipe 5 is 100mm in length in the barium sulfate particle size control reactor 1, the first feeding pipe 5 is designed by adopting a bent pipe, and a discharge port is upward;
the diameter of the second feeding pipe 9 (barium sulfide liquid) is 80mm, the height from the bottom of the barium sulfate particle size control reactor 1 is 500mm, the length in the barium sulfate particle size control reactor 1 is 100mm, the second feeding pipe 9 is designed by adopting a bent pipe, and a discharge port faces downwards. In addition, a DN80 flange 9-1 is arranged at the upper part of the second feeding pipe 9, blind plate plugging is carried out, and when crystallization plugging occurs, the blind plate is opened, so that the plugging can be quickly cleared;
the first feeding pipe 5 (sodium sulfate solution) and the second feeding pipe 9 (barium sulfide solution) are arranged at the same side of the barium sulfate particle size control reactor 1, the distance between the first feeding pipe and the second feeding pipe is 400mm, and the outlet distance between the first feeding pipe and the second feeding pipe is 300mm;
the distance between the lower layer stirring blade and the bottom of the barium sulfate particle size control reactor is 50mm, the length of the lower layer stirring blade is 400mm, the stirring inclination angle is 5 degrees, and the direction is upward;
the upper layer stirring blade is located above the lower layer stirring blade, the distance between the upper layer stirring blade and the bottom of the barium sulfate particle size control reactor is 350mm, the length of each upper layer stirring blade is 500mm, the stirring inclination angle is 5 degrees, and the direction is downward. The stirring device in the embodiment can ensure that barium sulfate particles formed after the reaction are more uniformly mixed, thereby avoiding particle agglomeration.
According to the invention, the hose 11 is a steel wire hose, the adjustable sleeve 12 is a stainless steel sleeve ring, the adjustable sleeve 12 is connected with the lifting end of the automatic lifting device 13, and the barium sulfate particle size control reactor is in a non-sealing structure to form a communicating vessel structure, so that the barium sulfate particle size control reactor can be used for controlling the liquid level of barium sulfate slurry in the barium sulfate particle size control reactor to form different reaction atmospheres, and further barium sulfate with different particle sizes and distribution ranges can be produced.
In the invention, the front surface of the barium sulfate particle size control reactor 1 is also provided with an inspection manhole which is connected by a flange and is sealed by a blind cover, and when a fault occurs, the blocking plate can be quickly opened for treatment.
In the present invention, the automatic lifting device is an existing device for adjusting the vertical height of the adjustable sleeve 12, and therefore, detailed description is not given.
The following examples 1-3 all used the above system to prepare barium sulfate with different particle size requirements.
Example 1
Step 1: respectively preparing 190g/l barium sulfide liquid and 300g/l sodium sulfate liquid, and respectively filling the prepared barium sulfide liquid and the prepared sodium sulfate liquid into a barium sulfide liquid storage tank and a sodium sulfate liquid storage tank;
step 2: according to the mol ratio of 1:1, setting the flow rates of barium sulfide liquid and sodium sulfate liquid, remotely controlling a first feeding pump and a second feeding pump to be opened for feeding, simultaneously controlling the feeding flow rate to be 1.5m/s, and controlling the stirring speed of barium sulfate slurry to be 40r/min;
and step 3: the DCS control system controls the automatic lifting device to drive the hose arranged on the adjustable sleeve to move up and down, the liquid level of barium sulfate slurry in the barium sulfate particle size control reactor is adjusted to be 600mm, a high-liquid-level reaction atmosphere is formed, and chemical combination reaction is continuously carried out. During the reaction, the slurry can be filtered, and sodium sulfate and barium chloride detection reagents are used to determine whether the reaction is at the equivalence point.
The particle size of the barium sulfate prepared in example 1 was measured by a laser particle size distribution analyzer, and the results are shown in fig. 2: d 50 ＝2.079μm、D 10 ＝0.802μm、D 90 =5.264 μm. The method is characterized in that under the high liquid level reaction atmosphere, the flow rates of two fluids of sodium sulfate and barium sulfide are low, the two fluids react at a constant speed in a barium sulfate suspension, a barium sulfate crystal nucleus grows steadily after being formed, the barium sulfate crystal nucleus is separated from a reaction system before being agglomerated in a large amount, and finally produced barium sulfate particles are large in average particle size and narrow in distribution range.
Example 2
Step 1: respectively preparing barium sulfide liquid with the concentration of 180g/l and sodium sulfate liquid with the concentration of 280g/l, and respectively filling the prepared barium sulfide liquid and the prepared sodium sulfate liquid into a barium sulfide liquid storage tank and a sodium sulfate liquid storage tank;
step 2: according to the mol ratio of 1:1, setting the flow rates of barium sulfide liquid and sodium sulfate liquid, remotely controlling a first feeding pump and a second feeding pump to be opened for feeding, simultaneously controlling the feeding flow rate to be 2.0m/s, and controlling the stirring speed of barium sulfate slurry to be 60r/min;
and step 3: the DCS control system controls the automatic lifting device to drive the hose arranged on the adjustable sleeve to move up and down, the liquid level of barium sulfate slurry in the barium sulfate particle size control reactor is adjusted to be 150mm, a low-liquid-level reaction atmosphere is formed, and chemical combination reaction is continuously carried out. During the reaction, the slurry can be filtered, and sodium sulfate and barium chloride detection reagents are used to determine whether the reaction is at the equivalence point.
The particle size of the barium sulfate prepared in example 2 was measured by a laser particle size distribution analyzer, and the results are shown in fig. 3: d 50 ＝0.79μm、D 10 ＝0.505μm、D 90 =1.489 μm. Under the low liquid level reaction atmosphere, two fluids of sodium sulfate and barium sulfide are collided at high speed and are collided violently, a vortex is generated in the flowing section direction, a strong shearing force is provided, the fine parts of the fluids are further divided and mixed, so that barium sulfate crystal nuclei are promoted to be quickly formed, the generated barium sulfate crystal grains are quickly discharged from a reactor, subsequent further growth and agglomeration are avoided, and finally produced barium sulfate grains are small in average grain size and narrow in distribution range.
Example 3
Step 1: respectively preparing 160g/l barium sulfide liquid and 260g/l sodium sulfate liquid, adding 1.0% of anionic dispersant (D4050) into the barium sulfide liquid, and respectively filling the prepared barium sulfide liquid and sodium sulfate liquid into a barium sulfide liquid storage tank and a sodium sulfate liquid storage tank;
step 2: according to the mol ratio of 1:1, setting the flow rates of barium sulfide liquid and sodium sulfate liquid, remotely controlling a first feeding pump and a second feeding pump to be opened for feeding, controlling the feeding flow rate to be 3.0m/s, and controlling the stirring speed of barium sulfate slurry to be 80r/min;
and 3, step 3: the DCS control system controls the automatic lifting device to drive the hose arranged on the adjustable sleeve to move up and down, the liquid level of barium sulfate slurry in the barium sulfate particle size control reactor is adjusted to be 100mm, a low-liquid-level reaction atmosphere is formed, and chemical combination reaction is continuously carried out. During the reaction, the slurry can be filtered, and sodium sulfate and barium chloride detection reagents are used to determine whether the reaction is at the equivalence point.
The particle size of the barium sulfate prepared in example 3 was measured by a laser particle size distribution analyzer, and the results were as follows: d 50 ＝0.31μm、D 10 ＝0.11μm、D 90 =1.02 μm. In addition, the microscopic morphology of the barium sulfate prepared in example 3 was characterized using a scanning electron microscope, as shown in fig. 4. As can be seen from the figure, baSO 4 The particles are spherical, complete in appearance and uniform in distribution. This is due to BaSO 4 The crystallization precipitation can be divided into three processes, a nucleation process, a grain growth process, a coalescence and agglomeration process. When dissolved anion (SO 4) 2- ) Cation (Ba) 2+ ) The product of the concentrations (i.e. the ion product) is greater than BaSO 4 When solubility product constant, baSO 4 Crystal nuclei will appear. The crystal nuclei collide with each other in the supersaturated solution and coalesce into crystal grains, and the crystal grains continue to grow to form BaSO 4 The particles have large specific surface area of fine grains, and adjacent grains are easy to aggregate and even hard to agglomerate, so that the obtained product has wide particle size distribution and no fixed morphology. At this time, in Ba 2+ D4050, the anion of which (PAA) is added to (BaS solution) - ) And Ba 2+ The reaction produces intermediate product (PAA-Ba) with low solubility, and free Ba in the solution 2+ The concentration is greatly reduced along with Na 2 SO 4 Addition of solution due to Ksp (BaSO) 4 ) < KSp (PAA-Ba), promoting the slow dissociation of PAA-Ba to generate white BaSO 4 Precipitate and release of PAA - Anion, PAA - Most of carboxylate radical of anion and free OH under strong alkaline environment - 、S 2- Co-adsorbed to BaSO 4 The surface of the particle has stronger electronegativity, the steric hindrance effect generated by the adsorption can effectively regulate and control the growth rate of each crystal face of the crystal grain, the formation of spherical particles is facilitated, and the process can keep BaSO 4 The ion accumulation is in a very low state, the reaction rate is basically kept constant, and the BaSO is reduced 4 The particle size is obtained, particles with complete appearance, fine particle size and uniform particle size distribution are obtained, and the specific reaction process is as follows:
Ba 2+ +D4050→PAA-Ba+Na + ；
Ba 2+ +SO4 2- →BaSO 4 ；
PAA-Ba→PAA - +Ba 2+ ；
BaSO 4 +PAA - /OH - /S 2- →PAA-BaSO 4 -OH - /S 2- 。
the foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.
Claims (10)
1. The utility model provides a but system of continuous control production different particle size barium sulfate which characterized in that, includes barium sulfate particle size control reactor, sodium sulfate liquid storage tank, first delivery pump, first electric control valve, first inlet pipe, barium sulfide liquid storage tank, second delivery pump, second electric control valve, second inlet pipe, agitating unit, hose, adjustable sleeve pipe, automatic lifting device and DCS control system, the discharge gate of sodium sulfate liquid storage tank pass through first inlet pipe and barium sulfate particle size control reactor 'S lateral wall intercommunication behind first delivery pump and first electric control valve in proper order, the discharge gate of barium sulfide liquid storage tank passes through second inlet pipe and barium sulfate particle size control reactor lateral wall intercommunication behind second delivery pump and the second electric control valve in proper order, the second inlet pipe is located barium sulfate particle size control reactor with one side with the first inlet pipe, and the second inlet pipe is located first inlet pipe, agitating unit installs in the barium sulfate particle size control reactor, the lower extreme of barium sulfate particle size control reactor is equipped with the thick liquid discharge gate with the hose intercommunication, the hose is installed on adjustable sleeve pipe, adjustable sleeve pipe installs at the adjustable sleeve pipe the lifting device' S along the vertical lifting device of the automatic lifting device and the lift control system is connected through the second inlet pipe, the automatic lifting device and the vertical movement of stirring pump.
2. The system capable of continuously controlling and producing barium sulfate with different particle sizes according to claim 1, wherein the stirring device comprises a stirring motor, a transmission device, a stirring shaft and stirring blades, the stirring motor and the transmission device are both installed at the top end of the barium sulfate particle size control reactor, the output end of the stirring motor is connected with the input end of the transmission device, the output end of the transmission device is connected with one end of the stirring shaft, the stirring shaft is installed at the center inside the barium sulfate particle size control reactor, and the stirring shaft is provided with a plurality of layers of stirring blades.
3. The system for continuously controlling the production of barium sulfate with different particle diameters according to claim 1, wherein an upper layer stirring blade and a lower layer stirring blade are arranged on the stirring shaft, the lower layer stirring blade is close to the bottom end of the stirring shaft, the stirring inclination angle of the lower layer stirring blade is 5 degrees, the direction is upward, the upper layer stirring blade is positioned above the lower layer stirring blade, the stirring inclination angle of the upper layer stirring blade is 5 degrees, the direction is downward, and the length of the upper layer stirring blade is greater than that of the lower layer stirring blade.
4. The system for continuously controlling the production of barium sulfate with different particle sizes according to claim 1, wherein the discharge port of the first feeding pipe in the barium sulfate particle size control reactor is designed as an elbow with the discharge port facing upward, the discharge port of the second feeding pipe in the barium sulfate particle size control reactor is designed as an elbow with the discharge port facing downward, and a DN80 flange is further arranged at the upper end of the discharge port of the second feeding pipe for plugging a blind plate.
5. The system for continuously and controllably producing barium sulfate with different particle sizes according to claim 4, wherein the vertical distance between the first feeding pipe and the second feeding pipe is 400mm, and the vertical distance between the discharge port of the first feeding pipe and the discharge port of the second feeding pipe is 300mm.
6. The system for continuously controlling the production of barium sulfate with different particle sizes according to claim 1, wherein the bottom end of the barium sulfate particle size control reactor is of a cone-shaped funnel structure, and the slurry outlet is arranged at the center of the bottom end of the cone-shaped funnel structure.
7. The method of claim 1
6 the method for continuously controlling and producing the barium sulfate with different particle sizes by the system is characterized by comprising the following specific steps:
step 1: respectively assembling the prepared barium sulfide liquid and sodium sulfate liquid with different solution concentrations in a barium sulfide liquid storage tank and a sodium sulfate liquid storage tank;
step 2: according to the mol ratio of 1:1, respectively setting the flow rates of barium sulfide liquid and sodium sulfate liquid, and simultaneously respectively controlling the flow rates of the sodium sulfate liquid and the barium sulfide liquid by a DCS (distributed control System) through a first conveying pump and a second conveying pump;
and step 3: according to the particle size and the distribution range of barium sulfate to be produced, a DCS control system controls an automatic lifting device to drive a hose arranged on an adjustable sleeve to move up and down, the liquid level of barium sulfate slurry in a barium sulfate particle size control reactor is adjusted, and different reaction atmospheres are formed;
and 4, step 4: and controlling the stirring speed of the stirring device by the DCS control system, and stirring the barium sulfate slurry in the barium sulfate particle size control reactor until the reaction is finished.
8. The method for continuously controlling the production of barium sulfate with different particle diameters according to claim 7, wherein when the flow rates of 190g/l barium sulfate solution and 300g/l sodium sulfate solution are 1.5m/s, the liquid level height of barium sulfate slurry is less than or equal to 600mm, and the stirring speed of the barium sulfate slurry is 40r/min, the particle diameter D of the produced barium sulfate is 50 ≥2.0μm。
9. The method for continuously controlling the production of barium sulfate with different particle diameters as claimed in claim 7, wherein the particle diameter D of the produced barium sulfate is defined as the particle diameter D when the flow rate of the barium sulfate solution and the sodium sulfate solution is 2.0m/s, the height of the liquid level of the barium sulfate slurry is less than or equal to 150mm, and the stirring speed of the barium sulfate slurry is 60r/min 50 The range is 0.7-1.0 μm.
10. The method for continuously controlling and producing barium sulfate with different particle diameters as claimed in claim 7, wherein when 1.0% of anionic dispersant is added into barium sulfate liquid, the flow rate of the barium sulfate liquid and the sodium sulfate liquid is 3.0m/s, the liquid level height of barium sulfate slurry is less than or equal to 100mm, and the stirring speed of the barium sulfate slurry is 80r/min, nano barium sulfate is generatedThe particle diameter of barium sulfate is D 50 The range is 150-400nm.
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