CN108854641B - Continuous pulping equipment and method for ultra-light fine materials - Google Patents
Continuous pulping equipment and method for ultra-light fine materials Download PDFInfo
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- CN108854641B CN108854641B CN201810705422.7A CN201810705422A CN108854641B CN 108854641 B CN108854641 B CN 108854641B CN 201810705422 A CN201810705422 A CN 201810705422A CN 108854641 B CN108854641 B CN 108854641B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/50—Circulation mixers, e.g. wherein at least part of the mixture is discharged from and reintroduced into a receptacle
- B01F25/52—Circulation mixers, e.g. wherein at least part of the mixture is discharged from and reintroduced into a receptacle with a rotary stirrer in the recirculation tube
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/40—Mixing liquids with liquids; Emulsifying
- B01F23/41—Emulsifying
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/60—Pump mixers, i.e. mixing within a pump
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/90—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/82—Combinations of dissimilar mixers
- B01F33/821—Combinations of dissimilar mixers with consecutive receptacles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/10—Maintenance of mixers
- B01F35/145—Washing or cleaning mixers not provided for in other groups in this subclass; Inhibiting build-up of material on machine parts using other means
- B01F35/1452—Washing or cleaning mixers not provided for in other groups in this subclass; Inhibiting build-up of material on machine parts using other means using fluids
- B01F35/1453—Washing or cleaning mixers not provided for in other groups in this subclass; Inhibiting build-up of material on machine parts using other means using fluids by means of jets of fluid, e.g. air
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/181—Preventing generation of dust or dirt; Sieves; Filters
- B01F35/184—Preventing generation of dust
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Abstract
The invention particularly relates to ultra-light fine material continuous pulping equipment and a pulping method. The device comprises a pulping tank, wherein a top cover I is arranged at the top of the pulping tank, a stirring motor I and a feed inlet I are arranged on the top cover I, a stirring slurry I is arranged on an output shaft of the stirring motor I, the stirring slurry I is positioned in the pulping tank, and the feed inlet I comprises an ultra-light fine material inlet, an additive inlet, a process water inlet and a feed back port I; the top cover I is also provided with a water pipe I, a water pipe II and a water film dust remover; a mist spraying nozzle and a blanking pipe are also arranged in the pulping tank; the device also comprises a buffer tank connected with the pulping tank in series; the invention adopts a continuous pulping method, adds partial reflux operation on the existing ultra-light fine material pulping process, so that the pulping process is continuous, and effectively solves the problems of unstable pulp quality caused by long pulping time, personnel error and accumulated error of the traditional intermittent pulping process; and the slurry materials are stirred uniformly for the second time, so that the uniformity of the composition of the slurry materials can be ensured.
Description
Technical Field
The invention belongs to the technical field of chemical engineering environmental protection, and particularly relates to ultra-light fine material continuous pulping equipment and a pulping method.
Background
At present, the grade division of the superfine materials in various countries in the world has no unified standard. Usually, the ultra-light fine powder refers to micro powder with the particle size of 1-100 mu m. The common superfine materials in industry include heavy calcium carbonate powder, bauxite, kaolin, white carbon black, graphite powder, active carbon, gypsum powder, titanium dioxide, bentonite and the like, and the superfine materials are important raw materials in modern industry. The application field of the superfine material can be multiplied by modifying the superfine material. The modified superfine material is not only a filling material, but also an important component of the product, so that the performances of the product, such as strength, elasticity, wear resistance, high temperature resistance, aging resistance, radiation resistance and the like, can be improved, and the production cost of the product can be greatly reduced. The ultra-light fines are extremely small in size, and their bulk density decreases several times as the size decreases compared to true density, often floating on the surface of the liquid in which they are to be dispersed.
The ultra-light fine material pulping is a common treatment procedure in the fields of coal chemical industry, textile, metallurgy, new energy and the like. The superfine material has small particle size and large surface energy, and is easy to be automatically aggregated into larger particles so as to reduce the surface energy. Because the superfine material has large specific surface area and small bulk density, and is generally lower than the density of slurry-forming liquid, the slurry-forming process is easy to float and difficult to form slurry. The existing ultra-light fine material pulping process method is that pulping liquor and ultra-light fine materials are added into a pulping tank, and intermittent pulping is carried out through stirring for a certain time. Moreover, the dust flying in the pulping process can cause severe operating environment, influence the physical and mental health of workers and have potential threat of dust explosion.
Disclosure of Invention
In order to avoid the defects of the prior art, the material pulping efficiency is improved; the quality of the slurry is ensured; the invention provides ultra-light fine material continuous pulping equipment and a process thereof, which solve the problem of dust pollution.
The invention is realized by the following technical scheme:
an ultra-light fine material continuous pulping device comprises:
the device comprises a pulping tank 10, wherein a top cover I11 is arranged at the top of the pulping tank 10, a stirring motor I12 and a feed inlet I are arranged on the top cover I11, a stirring slurry I121 is arranged on an output shaft of the stirring motor I12, the stirring slurry I121 is positioned in the pulping tank 10, and the feed inlet I comprises an ultra-light fine material inlet 131, an additive inlet 132, a process water inlet 133 and a feed back port I136;
the top cover I11 is also provided with a water pipe I134, a water pipe II 135 and a water film dust remover 14; the pulping tank 10 is also internally provided with a spray nozzle 15 and a blanking pipe 16;
one end of the water pipe I134 corresponding to one end of the water pipe II 135 is connected in parallel to serve as a fresh water interface, the other end of the water pipe II 135 is communicated with the water dust scrubber 14, and the other end of the water pipe I134 is communicated with the fog spraying nozzle (15);
the top of the water film dust collector 14 is provided with a fan 141, the bottom of the water film dust collector is provided with an air inlet 142 and a sewage outlet 143, and the air inlet 142 and the sewage outlet 143 respectively extend into the pulping tank 10;
one end of the blanking pipe 16 is communicated with the ultra-light fine material inlet 131, the other end of the blanking pipe 16 is a blanking port, and the blanking port 161 is positioned in the pulping tank 10; the spray nozzle 15 is positioned above the blanking port 161;
also comprises a buffer tank 20 connected with the pulping tank 10 in series; a top cover II 21 is arranged at the top of the buffer tank 20, a stirring motor II 22, a feed inlet II 23 and a feed back opening II 24 are arranged on the top cover II 21, a stirring slurry II 221 is arranged on an output shaft of the stirring motor II 22, and the stirring slurry II 221 is positioned in the buffer tank 20;
the bottom of the pulping tank 10 is provided with a pneumatic discharge valve I17, the pneumatic discharge valve I17 is connected in series with an inlet of a high-speed shear pump 30, an outlet end of the high-speed shear pump 30 is divided into two paths, one path is communicated to the feed inlet II 23 through a conveying pipe I31, and the other path is communicated to the feed back port I136 through a return pipe I32; the delivery pipe I31 is provided with a valve I311 and a flowmeter I312, and the return pipe I32 is provided with a valve II 321 and a flowmeter II 322;
a pneumatic discharging valve II 25 is arranged at the bottom of the buffer tank 20, the pneumatic discharging valve II 25 is connected in series with an inlet of a centrifugal conveying pump 40, an outlet end of the centrifugal conveying pump 40 is divided into two paths, one path is communicated to a slurry outlet through a conveying pipe II 41, and the other path is communicated to a return port II 24 through a return pipe II 42; the delivery pipe II 41 is provided with a valve III 411 and a flow meter III 412, and the return pipe II 42 is provided with a valve IV 421 and a flow meter IV 422.
Further, the blanking port 161 of the blanking pipe 16 is a bent pipe shaped blanking port, and the bending radian of the bent pipe shaped blanking port is 35-60 °.
Further, the spray nozzle 15 is arranged 0.5-1.5 m above the blanking port 161; the spray nozzles 15 are uniformly arranged around a circle with the radius of 0-1.2 m by taking the projection of the blanking port 161 on the same horizontal plane as the center of a circle, and the number of the spray nozzles 15 is equal to or more than 5.
Further, a first spraying layer and a second spraying layer are arranged in the water film dust collector 14; the first spraying layer and the second spraying layer are coaxially arranged, and the water pipe II is respectively connected to the first spraying layer and the second spraying header pipe inside the spraying layer.
Furthermore, the stirring paddle I121 and the stirring paddle II 221 are both set to be double-layer two-blade inclined paddle type stirring paddles.
Further, the centrifugal pump 40 is a variable frequency centrifugal pump, and the high-speed shear pump 30 is a variable frequency high-speed shear pump.
Furthermore, the pneumatic discharge valve I17 and the pneumatic discharge valve II 25 are connected with a back washing interface.
In order to realize the purpose, the invention also comprises a method for continuously pulping the ultra-light fine material, which comprises the following steps:
step (1): closing the valve I311 and opening the valve II 321, and continuously adding process water and additive solution into the pulping tank 10; the liquid adding speed of the process water is 5m3/h～15m3H; the mass concentration of the additive solution is 10-30%, and the liquid adding speed of the additive solution is 0.5m3/h～1.5m3H; obtaining a diluted additive solution;
step (2): when the diluted additive solution submerges the upper paddle of the stirring paddle I121, the addition of the process water and the additive solution is stopped; starting a stirring motor I12, and continuously stirring the diluted additive solution by a stirring paddle I121; the rotating speed of the stirring motor I12 is 60-100 r/min;
and (3): when the stirring time of the stirring paddle I121 is 0-10 min, respectively starting the spray nozzle 15 and the water film dust remover 14 in sequence; continuously and quantitatively adding the ultra-light fine material into the pulping tank 10; the adding speed of the ultra-light fine material is 1 t/h-4 t/h, and the feeding time is 1 h-4 h; obtaining mixed slurry;
and (4): starting a high-speed shearing pump 30 to shear the mixed slurry at a high speed; the high-speed shearing time is 30min, and the conveying capacity of the high-speed shearing pump 30 is 2-3 times of the conveying capacity of the finished slurry; obtaining a pulping material;
and (5): taking 50-150 ml of slurrying material, and detecting the standing and layering time of the slurrying material in a laboratory; standing and layering for 5-10 h, and enabling the ultra-light fine material continuous pulping system to reach a stable state;
and (6): opening the valve I311, and adjusting the valve opening degrees of the valve I311 and the valve II 321; adjusting the amount of the slurry material flowing back to the feed back port I136 and the feed inlet II 23; the flow ratio measured by the flow meter I312 and the flow meter II 322 is 1: 1-1: 3; and (7): closing the valve III 411 and opening the valve IV 421, and continuously conveying the slurry material into the buffer tank 20 through the feed inlet II 23;
and (8): when the volume of the slurry materials in the buffer tank 20 reaches 1/2 of the volume of the buffer tank 20, starting the stirring motor II 22, and continuously stirring the slurry materials in the buffer tank 20 by the stirring paddle II 221; the rotating speed of the stirring motor II 22 is 60 r/min;
and (9): when the volume of the slurry materials in the buffer tank 20 reaches 2/3 of the volume of the buffer tank 20, starting the centrifugal delivery pump 40, and stirring the slurry materials in a full-reflux manner; the conveying capacity of the centrifugal conveying pump 40 is 2-3 times of the conveying capacity of the finished slurry; stirring for 10 min;
step (10): opening a valve III 411, and adjusting the valve opening degree of the valve III 411 and the valve IV 421; adjusting the amount of the slurry material flowing back to the feed back port II 24 and the discharge port; the flow rate ratio measured by the flowmeter III 412 and the flowmeter IV 422 is 1: 1-1: 3; the qualified finished slurry is conveyed to a downstream working section, and the conveying capacity of the finished slurry is 20m3/h～50m3/h。
The beneficial effects of the invention include:
1. the invention adopts a continuous pulping method, adds partial reflux operation on the existing ultra-light fine material pulping process, so that the pulping process is continuous, and effectively solves the problems of unstable pulp quality caused by long pulping time, personnel error and accumulated error of the traditional intermittent pulping process; and the buffering reflux operation of the buffer tank is added, so that the slurry materials are stirred uniformly for the second time, and the uniformity of the slurry materials can be ensured.
2. The water membrane dust removal method replaces the traditional cloth bag dust removal method, avoids cloth bag blockage and frequent replacement and cleaning, and is convenient to operate; under the action of a fan of the water film dust collector, negative pressure is formed in the pulping tank and the water film dust collector, dust escaped from the tank body enters the water film dust collector, and under the washing and adsorption action of fresh water, dust particles are formed to wrap liquid water, and the liquid water is discharged into the pulping tank through a sewage discharge outlet under the action of gravity; a plurality of groups of dust suppression mist spraying nozzles are arranged in the pulping tank and are arranged above the blanking port, so that dust can be effectively suppressed, and dust diffusion is reduced from the source; therefore, the ultra-light fine material pulping system has no dust explosion danger, little dust pollution, safety and energy conservation.
3. The invention has simple equipment and convenient operation, can select equipment with proper specification and model according to specific requirements, effectively controls the floor area of the equipment and reduces the production cost; the pulping system can be used for pulping mixing projects of various ultra-light fine materials, and has high operation flexibility and high pulping concentration; the conveying capacity of a pipeline is controlled by a high-speed shear pump and a centrifugal conveying pump in a variable frequency mode, and the control precision is high; the high-speed shear pump has mixing and emulsifying functions, and is beneficial to quickly mixing to form slurry; the centrifugal delivery pump replaces a diaphragm pump with large volume, which is beneficial to saving cost, reducing equipment space and ensuring the pulping effect of ultra-light fine materials; compared with the existing intermittent pulping process equipment, the invention can reduce the equipment capacity by about 30-50% on the same scale, save the labor by about 80%, and basically realize full-automatic unattended operation on the operation site.
4. The stirring paddles are arranged into double-layer two-blade inclined paddle type stirring paddles, and the upper layer of paddles are close to the liquid level, so that vortex is favorably formed, superfine materials are easy to enter the position below the liquid level, dust is reduced, and the pulping speed is accelerated; the lower paddle is close to the bottom end socket, so that up-and-down circulating flow can be formed, and uniform mixing of slurry is facilitated; the upper paddle of the double-layer two-blade inclined paddle type stirring paddle of the buffer tank is positioned at the liquid level position of about one half of the buffer tank, so that the stability of slurry is kept.
5. The invention also reserves an additive inlet, the additive is used for adjusting the dispersing ability of the additive in the liquid, and the proportion of the additive is selected according to the characteristics of the slurry materials; pneumatic baiting valve I, pneumatic baiting valve II all are connected with the back flush interface, can prevent that the system from stopping the condition that the thick liquids subside, are difficult to the flash mixed that leads to for a long time.
Drawings
FIG. 1 is a flow chart of the apparatus of the present invention;
FIG. 2 is a schematic view of a spray nozzle in a pulping tank;
FIG. 3 is a block diagram of the process of the present invention.
The reference numerals in fig. 1 illustrate: 10-pulping tank; 11-a top cover I; 12-a stirring motor I; 121-stirring paddle I; 131-ultra-light fine material inlet; 132-additive inlet; 133-a process water inlet; 134-Water pipe I; 135-water pipe II; 136-feed back port I; 14-a dust scrubber; 141-a fan; 142-an air inlet; 143-a sewage draining outlet; 15-a spray nozzle; 16-a blanking pipe; 161-blanking port; 17-a pneumatic discharge valve I; 20-a buffer stirring tank; 21-top cover II; 22-stirring motor II; 221-stirring paddle II; 23-feed inlet II; 24-a feed back port II; 25-pneumatic discharge valve II; 30-high speed shear pump; 31-conveying pipe I; 311-valve I; 312-flowmeter I; 32-reflux pipe I; 321-valve II; 322-flowmeter II; 40-centrifugal delivery pump; 41-conveying pipe II; 411-valve iii; 412-flowmeter III; 42-reflux pipe II; 421-valve IV; 422-flowmeter IV;
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 detailed description and specific examples, while indicating the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1:
an ultra-light fine material continuous pulping device is shown in figure 1, and comprises:
the device comprises a pulping tank 10, wherein a top cover I11 is arranged at the top of the pulping tank 10, a stirring motor I12 and a feed inlet I are arranged on the top cover I11, a stirring slurry I121 is arranged on an output shaft of the stirring motor I12, the stirring slurry I121 is positioned in the pulping tank 10, and the feed inlet I comprises an ultra-light fine material inlet 131, an additive inlet 132, a process water inlet 133 and a feed back port I136; the additive inlet 132 is used to add additives to adjust the dispersion of the fines in the liquid, the amount of additives being selected based on the characteristics of the slurry material.
The top cover I11 is also provided with a water pipe I134, a water pipe II 135 and a water film dust remover 14; the pulping tank 10 is also internally provided with a spray nozzle 15 and a blanking pipe 16; fresh water is connected to one end, corresponding to the water pipe I134 and the water pipe II 135, of the water pipe I134 in parallel, the other end of the water pipe II 135 is communicated with the water film dust collector 14, and the other end of the water pipe I134 is communicated with the fog spraying nozzle (15); the top of the water film dust collector 14 is provided with a fan 141, the bottom of the water film dust collector is provided with an air inlet 142 and a sewage outlet 143, and the air inlet 142 and the sewage outlet 143 respectively extend into the pulping tank 10; a first spraying layer and a second spraying layer are arranged in the water film dust remover 14; the first spraying layer and the second spraying layer are coaxially arranged, and the water pipe II is respectively connected to the first spraying layer and the second spraying header pipe inside the spraying layer. Under the action of the fan 141 of the water film dust collector 14, negative pressure is formed inside the pulping tank 10 and the water film dust collector 14, dust escaped from the pulping tank 10 enters the water film dust collector 14, liquid water is wrapped by dust particles under the washing and adsorption action of fresh water, the dust-containing sewage directly flows back and is discharged into the pulping tank 10 through the sewage discharge port 143 under the action of gravity, and the dust-containing sewage is high in collecting efficiency and free of pollution.
One end of the blanking pipe 16 is communicated with the ultra-light fine material inlet 131, the other end of the blanking pipe 16 is a blanking port, and the blanking port 161 is positioned in the pulping tank 10; the spray nozzle 15 is positioned above the blanking port 161; the blanking port 161 of the blanking pipe 16 is a bent pipe shaped blanking port, the bending radian of the bent pipe shaped blanking port is 50 degrees, and the arc shaped blanking has less raised dust; the spray nozzle 15 is arranged 1m above the blanking port 161; the spray nozzles 15 are uniformly arranged around a circle with the radius of 1m by taking the projection of the blanking port 161 on the same horizontal plane as the center of a circle, and the number of the spray nozzles 15 is 5, as shown in fig. 2. The fresh water sprayed by the spray nozzle 15 can effectively inhibit the ultra-light fine materials at the blanking port 161 from forming dust, and the dust diffusion is reduced from the source.
Also comprises a buffer tank 20 connected with the pulping tank 10 in series; a top cover II 21 is arranged at the top of the buffer tank 20, a stirring motor II 22, a feed inlet II 23 and a feed back opening II 24 are arranged on the top cover II 21, a stirring slurry II 221 is arranged on an output shaft of the stirring motor II 22, and the stirring slurry II 221 is positioned in the buffer tank 20;
the bottom of the pulping tank 10 is provided with a pneumatic discharge valve I17, the pneumatic discharge valve I17 is connected in series with an inlet of a high-speed shear pump 30, and an outlet end of the high-speed shear pump 30 is divided into two paths; one path is communicated to the feed inlet II 23 through a conveying pipe I31, and the other path is communicated to the feed back port I136 through a return pipe I32; the delivery pipe I31 is provided with a valve I311 and a flowmeter I312, and the return pipe I32 is provided with a valve II 321 and a flowmeter II 322; under the action of mechanical motion and centrifugal force, the materials are subjected to high-speed shearing and are uniformly mixed, and the mixing effect is good through grinding, crushing, stirring and emulsifying.
A pneumatic discharge valve II 25 is arranged at the bottom of the buffer tank 20, the pneumatic discharge valve II 25 is connected in series with an inlet of the centrifugal conveying pump 40, and an outlet end of the centrifugal conveying pump 40 is divided into two paths; one path is communicated to a slurry outlet through a conveying pipe II 41, and the other path is communicated to the feed back port II 24 through a return pipe II 42; the delivery pipe II 41 is provided with a valve III 411 and a flow meter III 412, and the return pipe II 42 is provided with a valve IV 421 and a flow meter IV 422.
The pulping tank 10 and the buffer tank 20 are matched to form an ultra-light fine material pulping system, so that continuous pulping can be realized, and the pulping efficiency is improved; the buffer tank 20 has the function of aging the slurry, so that the quality of the finished slurry is stable; partial reflux continuous operation is adopted, slurry reflux is favorable for accelerating slurry formation, and a centrifugal conveying pump is adopted for conveying slurry materials. The problems of long pulping time, personnel error and unstable accumulated error pulp quality of the traditional intermittent pulping process are effectively solved, the pulping efficiency can be improved by about 40 percent, the uniformity of the composition of the pulp can be ensured, the degree of automation is high, the labor cost is low, no dust pollution is caused, and the continuous stability of the downstream process production is facilitated.
Furthermore, the stirring paddle I121 and the stirring paddle II 221 are both set to be double-layer two-blade inclined paddle type stirring paddles. The upper layer of blades of the stirring paddle I121 are close to the liquid level, so that vortex flow is formed, superfine materials can easily enter the liquid level, dust is reduced, and the slurry forming speed is accelerated; the lower paddle is close to the bottom end socket of the pulping tank 10, so that up-and-down circulating flow can be formed, and uniform mixing of the pulp is facilitated. The upper layer of the paddle II 221 is positioned at the liquid level position of the 1/2 buffer tank 20, which is beneficial to keeping the slurry stable.
Further, the centrifugal pump 40 is a variable frequency centrifugal pump, and the high-speed shear pump 30 is a variable frequency high-speed shear pump. The high-speed shear pump 30 can regulate and control the rotating speed in a variable frequency mode, and further control the conveying capacity of the conveying pipe I and the conveying capacity of the return pipe I; the centrifugal conveying pump 40 can regulate and control the rotating speed in a variable frequency mode, so that the conveying capacity of the conveying pipe II and the return pipe II is controlled, and the conveying amount of downstream slurry forming materials is controlled; is favorable for flow control and energy conservation.
Furthermore, pneumatic baiting valve I17, pneumatic baiting valve II 25 all are connected with the back flush interface, can prevent that the system from stopping the condition that the thick liquids subside, are difficult to the flash mixed that leads to for a long time.
Example 2
A method for continuously pulping ultra-light fine materials, which is shown in figure 3: the ultra-light fine material continuous pulping equipment in the embodiment 1 is taken as the pulping equipment in the embodiment; taking superfine graphite powder for pulping as an example; wherein the effective volumes of the pulping tank 10 and the buffer tank 20 in the pulping equipment are both 30m3Delivery capacity of high speed shear pump 30 is 25m3H, the delivery capacity of the centrifugal delivery pump 40 is 20m3Per h, the qualified finished product slurry conveying capacity is 10m3The method specifically comprises the following steps:
step (1): closing the valve I311 and opening the valve II 321, and continuously adding the process water and the sodium dodecyl benzene sulfonate solution into the pulping tank 10; the addition of the process water is 7m3H; the mass concentration of the sodium dodecyl benzene sulfonate solution is 25 percent, and the adding amount of the sodium dodecyl benzene sulfonate solution is 0.5m3H; obtaining a diluted additive solution;
step (2): when the upper layer of blades of the stirring paddle I (121) are submerged by the diluted additive solution, stopping adding the process water and the sodium dodecyl benzene sulfonate solution; starting a stirring motor I (12), and continuously stirring the diluted additive solution by a stirring paddle I (121); the rotating speed of the stirring motor I (12) is 70 r/min;
and (3): when the stirring time of the stirring paddle I (121) is 0-10 min, respectively starting the spray nozzle (15) and the water film dust remover (14) in sequence; continuously and quantitatively adding superfine graphite powder into a pulping tank (10); the adding amount of the superfine graphite powder is 2.5t/h, and the adding time is 3 h; obtaining mixed slurry;
and (4): starting a high-speed shearing pump 30 to shear the mixed slurry at a high speed; the high speed shear pump 30 has a delivery capacity of 25m3H, the high-speed shearing time is 30 min; obtaining a pulping material;
and (5): taking 100ml of slurry forming material, and detecting the standing and layering time of the slurry forming material in a laboratory; no obvious layering exists after 6 hours, and the median diameter d of the superfine graphite powder50When 5 mu m reaches 25% of the total mass of the slurry materials, the ultra-light fine material continuous pulping system reaches a stable state;
and (6): opening the valve I311, and adjusting the valve opening degrees of the valve I311 and the valve II 321; adjusting the amount of the slurry material flowing back to the feed back port I136 and the feed inlet II 23; the flow ratio measured by the flowmeter I312 and the flowmeter II 322 is 1: 1;
and (7): opening a valve IV 421 and closing a valve III 411, and continuously conveying the slurry material into the buffer tank 20 through a feed inlet II 23;
and (8): when the volume of the slurry materials in the buffer tank (20) reaches 1/2 of the volume of the buffer tank (20), starting the stirring motor II (22), and continuously stirring the slurry materials in the buffer tank (20) by the stirring paddle II (221); the rotating speed of the stirring motor II (22) is 60 r/min;
and (9): when the volume of the slurry materials in the buffer tank (20) reaches 2/3 of the volume of the buffer tank (20), starting the centrifugal delivery pump (40) and stirring the slurry materials in a full reflux manner; the conveying capacity of the centrifugal conveying pump 40 is 20m3H; refluxing and stirring for 10 min;
step (10): opening the valve III (411), and adjusting the valve opening degree of the valve III (411) and the valve IV (421); adjusting the amount of the slurry material flowing back to the feed back port II (24) and the discharge port; the flow ratio measured by the flowmeter III (412) and the flowmeter IV (422) is 1: 1; the qualified finished product slurry is conveyed to a downstream working section, and the conveying capacity of the finished product graphite slurry is 10m3/h。
Example 3
A method for continuous pulping of ultra-light fines, as shown in figure 3: the ultra-light fine material continuous pulping equipment in the embodiment 1 is taken as the pulping equipment in the embodiment; with ultrafine TiO2Pulping for example; wherein the effective volumes of the pulping tank 10 and the buffer tank 20 in the pulping equipment are both 50m330 flow rate of high-speed shear pump 45m3Flow rate of 40 m of centrifugal delivery pump3H, downstream Process throughput 15m3The method specifically comprises the following steps:
step (1): closing the valve I311 and opening the valve II 321, and continuously adding the process water and the sodium dodecyl benzene sulfonate solution into the pulping tank 10; the addition of the process water is 13m3H; the mass concentration of the sodium dodecyl benzene sulfonate solution is 15 percent, and the adding amount of the sodium dodecyl benzene sulfonate solution is 0.5m3H; obtaining a diluted additive solution;
step (2): when the upper layer of blades of the stirring paddle I (121) are submerged by the diluted additive solution, stopping adding the process water and the sodium dodecyl benzene sulfonate solution; starting a stirring motor I (12), and continuously stirring the diluted additive solution by a stirring paddle I (121); the rotating speed of the stirring motor I (12) is 80 r/min;
and (3): when the stirring time of the stirring paddle I (121) is 0-10 min, the injection is started in sequence respectivelyA fog nozzle (15) and a water film dust remover (14); continuously and quantitatively adding superfine TiO into a pulping tank (10)2(ii) a The ultrafine TiO being2The adding amount of the raw materials is 1.6t/h, and the adding time is 3.125 h; obtaining mixed slurry;
and (4): starting a high-speed shearing pump 30 to shear the mixed slurry at a high speed; the delivery capacity of the high speed shear pump 30 is 45m3H, the high-speed shearing time is 30 min; obtaining a pulping material;
and (5): taking 100ml of slurry forming material, and detecting the standing and layering time of the slurry forming material in a laboratory; no obvious layering after 6 hours, and the superfine TiO2Median diameter d50When 5 mu m reaches 10 percent of the total mass of the slurry materials, the ultra-light fine material continuous pulping system reaches a stable state;
and (6): opening the valve I311, and adjusting the valve opening degrees of the valve I311 and the valve II 321; adjusting the amount of the slurry material flowing back to the feed back port I136 and the feed inlet II 23; the flow ratio measured by the flowmeter I312 and the flowmeter II 322 is 1: 1.25; and (7): opening a valve IV 421 and closing a valve III 411, and continuously conveying the slurry material into the buffer tank 20 through a feed inlet II 23;
and (8): when the volume of the slurry materials in the buffer tank (20) reaches 1/2 of the volume of the buffer tank (20), starting the stirring motor II (22), and continuously stirring the slurry materials in the buffer tank (20) by the stirring paddle II (221); the rotating speed of the stirring motor II (22) is 60 r/min;
and (9): when the volume of the slurry materials in the buffer tank (20) reaches 2/3 of the volume of the buffer tank (20), starting the centrifugal delivery pump (40) and stirring the slurry materials in a full reflux manner; the conveying capacity of the centrifugal conveying pump 40 is 35m3H; stirring for 10 min;
step (10): opening the valve III (411), and adjusting the valve opening degree of the valve III (411) and the valve IV (421); adjusting the amount of the slurry material flowing back to the feed back port II (24) and the discharge port; the flow ratio measured by the flowmeter III (412) and the flowmeter IV (422) is 1: 1; the qualified finished product slurry, finished product TiO is conveyed to a downstream working section2The amount of slurry transferred was 15m3/h。
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. The utility model provides an ultralight fine material slurrying equipment in succession, includes slurrying jar (10), and the top of slurrying jar (10) is equipped with top cap I (11), be equipped with agitator motor I (12) and feed inlet I on top cap I (11), be equipped with on the output shaft of agitator motor I (12) and stir thick liquid I (121), stir thick liquid I (121) are located slurrying jar (10), its characterized in that:
the feed inlet I comprises an ultra-light fine material inlet (131), an additive inlet (132), a process water inlet (133) and a return port I (136);
the top cover I (11) is also provided with a water pipe I (134), a water pipe II (135) and a water film dust remover (14); a mist spraying nozzle (15) and a blanking pipe (16) are also arranged in the pulping tank (10);
one end of the water pipe I (134) corresponding to one end of the water pipe II (135) is connected in parallel to be used as a fresh water inlet, the other end of the water pipe II (135) is communicated with the water film dust collector (14), and the other end of the water pipe I (134) is communicated with the spraying nozzle (15);
the top of the water film dust collector (14) is provided with a fan (141), the bottom of the water film dust collector is provided with an air inlet (142) and a sewage outlet (143), and the air inlet (142) and the sewage outlet (143) respectively extend into the pulping tank (10);
one end of the blanking pipe (16) is communicated with the ultra-light fine material inlet (131), the other end of the blanking pipe (16) is provided with a blanking port, and the blanking port (161) is positioned in the pulping tank (10); the mist spraying nozzle (15) is positioned above the blanking port (161);
the device also comprises a buffer tank (20) connected with the pulping tank (10) in series; a top cover II (21) is arranged at the top of the buffer tank (20), a stirring motor II (22), a feeding hole II (23) and a material returning hole II (24) are arranged on the top cover II (21), a stirring slurry II (221) is arranged on an output shaft of the stirring motor II (22), and the stirring slurry II (221) is located in the buffer tank (20);
the bottom of the pulping tank (10) is provided with a pneumatic discharging valve I (17), the pneumatic discharging valve I (17) is connected in series with an inlet of a high-speed shearing pump (30), an outlet end of the high-speed shearing pump (30) is divided into two paths, one path is communicated to the feed inlet II (23) through a conveying pipe I (31), and the other path is communicated to the feed back port I (136) through a return pipe I (32); a valve I (311) and a flowmeter I (312) are arranged on the delivery pipe I (31), and a valve II (321) and a flowmeter II (322) are arranged on the return pipe I (32);
a pneumatic discharging valve II (25) is arranged at the bottom of the buffer tank (20), the pneumatic discharging valve II (25) is connected in series with an inlet of a centrifugal conveying pump (40), an outlet end of the centrifugal conveying pump (40) is divided into two paths, one path is communicated to a slurry outlet through a conveying pipe II (41), and the other path is communicated to a return port II (24) through a return pipe II (42); and a valve III (411) and a flowmeter III (412) are arranged on the delivery pipe II (41), and a valve IV (421) and a flowmeter IV (422) are arranged on the return pipe II (42).
2. The continuous pulping apparatus of the ultra-light fines of claim 1, characterized in that: the blanking port (161) of the blanking pipe (16) is a bent pipe-shaped blanking port, and the bending radian of the bent pipe-shaped blanking port is 35-60 degrees.
3. The continuous pulping apparatus of the ultra-light fines of claim 1, characterized in that: the mist spraying nozzle (15) is arranged at a position 0.5-1.5 m above the blanking port (161); penetrate fog shower nozzle (15) and use blanking mouth (161) projection on same horizontal plane as the centre of a circle, evenly arrange around the radius is 0~1.2m circle, penetrate the quantity of fog shower nozzle (15) and be equal to or more than 5.
4. The continuous pulping apparatus of the ultra-light fines of claim 1, characterized in that: a first spraying layer and a second spraying layer are arranged in the water film dust remover (14); the first spraying layer and the second spraying layer are coaxially arranged, and the water pipe II is respectively connected to the first spraying layer and the second spraying header pipe inside the spraying layer.
5. The continuous pulping apparatus of the ultra-light fines of claim 1, characterized in that: the stirring paddle I (121) and the stirring paddle II (221) are both set to be double-layer two-blade inclined paddle type stirring paddles.
6. The continuous pulping apparatus of the ultra-light fines of claim 1, characterized in that: the centrifugal delivery pump (40) is a variable-frequency centrifugal delivery pump, and the high-speed shear pump (30) is a variable-frequency high-speed shear pump.
7. The continuous pulping apparatus of the ultra-light fines of claim 1, characterized in that: and the pneumatic discharging valve I (17) and the pneumatic discharging valve II (25) are connected with backwashing interfaces.
8. A method for realizing continuous pulping of ultra-light fine materials by using the continuous pulping equipment of ultra-light fine materials as claimed in any one of claims 1 to 7, which is characterized by comprising the following steps: the method comprises the following steps:
step (1): closing the valve I (311) and opening the valve II (321), and continuously and quantitatively adding process water and additive solution into the pulping tank (10); the addition of the process water is 5m3/h~15m3H; the mass concentration of the additive solution is 10-30%, and the addition amount of the additive solution is 0.5m3/h~1.5m3H; obtaining a diluted additive solution;
step (2): when the diluted additive solution submerges the upper paddle of the stirring paddle I (121), stopping adding the process water and the additive solution; starting a stirring motor I (12), and continuously stirring the diluted additive solution by a stirring paddle I (121); the rotating speed of the stirring motor I (12) is 60 r/min-100 r/min;
and (3): when the stirring time of the stirring paddle I (121) is 0-10 min, respectively starting the spray nozzle (15) and the water film dust remover (14) in sequence; continuously and quantitatively adding the ultra-light fine material into a pulping tank (10) to obtain mixed slurry; the adding amount of the ultra-light fine material is 1-4 t/h, and the feeding time is 1-4 h;
and (4): starting a high-speed shearing pump (30) to shear the mixed slurry at a high speed; the high-speed shearing time is 30min, and the conveying capacity of the high-speed shearing pump (30) is 2-3 times of the conveying capacity of the finished slurry; obtaining a pulping material;
and (5): taking 50-150 ml of slurrying material, and detecting the standing and layering time of the slurrying material in a laboratory; standing and layering for 5-10 h, and enabling the ultra-light fine material continuous pulping system to reach a stable state;
and (6): opening the valve I (311), and adjusting the valve opening degrees of the valve I (311) and the valve II (321); adjusting the amount of the slurry material flowing back to the feed back port I (136) and the feed inlet II (23); the flow rate ratio measured by the flowmeter I (312) and the flowmeter II (322) is 1: 1-1: 3;
and (7): closing the valve III (411) and opening the valve IV (421), and continuously conveying the slurry material into the buffer tank (20) from the feed inlet II (23);
and (8): when the volume of the slurry materials in the buffer tank (20) reaches 1/2 of the volume of the buffer tank (20), starting the stirring motor II (22), and continuously stirring the slurry materials in the buffer tank (20) by the stirring paddle II (221); the rotating speed of the stirring motor II (22) is 60 r/min;
and (9): when the volume of the slurry materials in the buffer tank (20) reaches 2/3 of the volume of the buffer tank (20), starting the centrifugal delivery pump (40) and stirring the slurry materials in a full reflux manner; the conveying capacity of the centrifugal conveying pump (40) is 2-3 times of the conveying capacity of the finished slurry; stirring for 10 min;
step (10): opening the valve III (411), and adjusting the valve opening degree of the valve III (411) and the valve IV (421); adjusting the flow back of the slurried materialThe amount of a feed back port II (24) and an inflow discharge port; the flow rate ratio measured by the flowmeter III (412) and the flowmeter IV (422) is 1: 1-1: 3; the qualified finished slurry is conveyed to a downstream working section, and the conveying capacity of the finished slurry is 20m3/h~50m3/h。
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| CN110270239A (en) * | 2019-06-11 | 2019-09-24 | 新奥科技发展有限公司 | Powder pulping process |
| CN113234922B (en) * | 2021-05-21 | 2023-07-25 | 长沙有色冶金设计研究院有限公司 | Powder material flushing system and method |
| CN114149829B (en) * | 2021-11-24 | 2022-11-22 | 中国科学院过程工程研究所 | Carbide slag powder slurrying and exhausting device and application method thereof |
| CN113813809B (en) * | 2021-11-24 | 2022-03-01 | 三一技术装备有限公司 | Circulating tank and pulping system |
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