CN110681586B

CN110681586B - Carbon black classified screening device

Info

Publication number: CN110681586B
Application number: CN201810729981.1A
Authority: CN
Inventors: 周博
Original assignee: Jiangxi Normal University
Current assignee: Jiangxi Normal University
Priority date: 2018-07-05
Filing date: 2018-07-05
Publication date: 2021-06-15
Anticipated expiration: 2038-07-05
Also published as: CN110681586A

Abstract

A carbon black classifying screen device is characterized by comprising: the primary dust collection screening device comprises a dust collection screening tank, a first spiral pipeline and a first air compressor; the secondary screening device comprises a second screening tank, a third screening tank and a fourth screening tank; the console is provided with a display table and a control knob. The dust absorption screening jar of one-level dust absorption sieving mechanism is connected to the second grade sieving mechanism, one-level dust absorption sieving mechanism and second grade sieving mechanism and control cabinet electric connection. Compared with the prior art, the invention realizes the dust treatment of the carbon black, screens the carbon black in a grading way, screens massive carbon black and large-particle carbon black, then pours the carbon black into the main powdering chamber of the carbon black pulverizer, pours the secondary carbon black into the secondary powdering chamber, improves the working efficiency of the carbon black powdering machine, and integrally improves the utilization rate of carbon black resources.

Description

Carbon black classified screening device

Technical Field

The invention relates to the field of screening devices, in particular to a carbon black grading screening device.

Background

Carbon black is an amorphous carbon. The light, loose and extremely fine black powder has a very large surface area ranging from 10 to 3000m2/g, and is a product obtained by incomplete combustion or thermal decomposition of carbonaceous substances (coal, natural gas, heavy oil, fuel oil, etc.) under the condition of insufficient air.

The carbon black product produced at present is medium in particle size, narrow in particle size distribution and poor in dispersibility and flowability of carbon black, carbon black particles in the production process need to be screened to remove dust, agglomerated carbon black and large-particle carbon black, the qualification rate of the final product is ensured, and the screened agglomerated carbon black and large-particle carbon black are further treated to improve the utilization rate of the carbon black.

In the prior art, the dust in carbon black is removed mainly by a dust collection fan, for example, the publication number CN: 205550849U discloses a carbon black finished product powder dust removal device, which sucks away dust under the action of a dust suction fan, and has no effect on the existing carbon black which is agglomerated into blocks although the problems of the original powder dust remover are solved; the vibrating screen can have certain effects, such as the vibrating screen with the publication number of CN: 103658009A discloses a carbon black sieving mechanism, the filter effect who utilizes the fine sieve mesh that sets up on the shale shaker and coarse mesh carries out the carbon black and filters, though can play the filter effect to the blocking carbon black, but does not have the filter effect simultaneously because the sieve mesh is little to the unqualified carbon black of fine, is blocked by cubic carbon black very easily, seriously influences the screening effect.

The screened blocky carbon black or large-particle carbon black needs to be further processed, so that the utilization rate of resources is improved. In the prior art, for example, publication numbers CN: 101337198B, which are used for further utilization by separating and pulverizing the agglomerated carbon black. However, the treatment of the lumpy carbon black in the primary powdering chamber takes a process time and impairs the operating efficiency of the secondary powdering chamber, which becomes a bottleneck and needs to be improved.

The invention discloses a device for grading and screening carbon black, which solves the defects of the prior art.

Disclosure of Invention

Aiming at the problems brought forward by the background technology, the invention provides a carbon black grading and screening device which can remove dust and fine unqualified carbon black in the carbon black, and can grade agglomerated carbon black and large-particle carbon black, so that the agglomerated carbon black and the large-particle carbon black can be poured into a main powdering chamber and a secondary powdering chamber of a carbon black pulverizer respectively.

A carbon black classifying screen device, comprising:

the primary dust collection screening device comprises a dust collection screening tank, a spiral pipeline and a first air compressor and is used for removing dust and primarily screening carbon black particles in a grading manner;

the secondary screening device comprises a second screening tank, a third screening tank and a fourth screening tank and is used for further screening the carbon black particles;

the control console is provided with a display meter and a control knob and is used for displaying the numerical value of the pressure meter and controlling the output power of the air compressor;

the dust absorption screening jar of one-level dust absorption sieving mechanism is connected to the second grade sieving mechanism, one-level dust absorption sieving mechanism and second grade sieving mechanism and control cabinet electric connection.

The primary dust collection screening device comprises a dust collection screening tank, a spiral pipeline and a first air compressor, wherein the spiral pipeline is arranged in the inner wall of the dust collection screening tank, and the first air compressor is arranged at the port of the spiral pipeline; the dust-absorbing screening tank is provided with an air suction port communicated with the spiral pipeline. Through the primary dust-absorbing screening device, dust enters the spiral pipeline from the air suction port along with air flow under the action of pressure difference.

The upper part of the dust collection screening tank is provided with a dust collection cavity, the lower part of the dust collection screening tank is provided with a screening cavity, and the dust collection cavity is communicated with the screening cavity through a communicating cavity; the top of the dust collection screening tank is provided with an inclined inlet, and the bottom of the dust collection screening tank is provided with a large particle discharge port, a secondary particle discharge port and a small particle discharge port. After the dust collection screening tank is screened, massive carbon black and large-particle carbon black are discharged from a large-particle discharge port, secondary carbon black is discharged from a secondary-particle discharge port, and small-particle carbon black is discharged from a small-particle discharge port.

Furthermore, a fine filter screen is arranged on the air suction port; the fine filter screen can prevent qualified carbon black particles from entering the spiral pipeline and prevent the carbon black particles from blocking the spiral pipeline.

Further, the upper end of the spiral pipeline is connected with a first air compressor, so that the air flow spirally flows downwards; the dust can be prevented from accumulating in the spiral pipeline.

Furthermore, a first Venturi tube is arranged at the upper end of the spiral pipeline, and a first speed measuring meter is arranged on the first Venturi tube; the venturi pipe is matched with the velocity meter I, and the current air flow velocity can be accurately displayed.

Furthermore, a dispersing pile is arranged at the pouring inlet of the dust collection screening tank, and the dispersing pile is conical; the dispersing pile can enlarge the contact area of the airflow and the carbon black material and improve the dust removal effect.

Further, a pressure stabilizing valve is arranged in the screening cavity; the surge damping valve can maintain certain pressure differential, reduces the influence that other factors caused the screening effect.

The inner wall of the screening tank II is provided with a spiral pipeline II which is connected with an air compressor II; the upper part of the screening tank II is provided with a dumping inlet II, and the bottom of the screening tank II is provided with a large particle outlet and a secondary carbon black outer ring opening; the second pouring inlet is connected to a large particle discharge port of the primary dust-absorbing screening device.

The inner wall of the screening tank III is provided with a spiral pipeline III which is connected with an air compressor III; the upper part of the screening tank III is provided with a pouring port III, and the bottom of the screening tank III is provided with a large-particle carbon black small opening and a secondary carbon black ring opening; the third pouring inlet is connected to a secondary particle carbon black discharge port of the primary dust suction screening device.

The inner wall of the screening tank IV is provided with a spiral pipeline IV which is connected with an air compressor IV; the upper part of the screening tank IV is provided with a pouring inlet IV, and the bottom of the screening tank IV is provided with a secondary carbon black small opening and a small-particle carbon black ring opening; the four pouring inlets are connected to a small-particle carbon black discharge port of the primary dust-absorbing screening device.

And a secondary carbon black outer ring opening of the second screening tank, a secondary carbon black ring opening of the third screening tank and a secondary carbon black small opening of the fourth screening tank are respectively connected to four ports of the four-way pipeline, and the other end of the four-way pipeline is used as an output port of the secondary carbon black. And secondary carbon black particles are output from the output port and poured into a secondary powder grinding chamber of the carbon black pulverizer for reutilization.

The large particle outlet of the second screening tank and the large particle carbon black small opening of the third screening tank are connected to two ports of the three-way pipeline, and the other end of the three-way pipeline is used as an output port of the large particle carbon black. Blocky carbon black and large-particle carbon black are output from the output port, and the blocky carbon black and the large-particle carbon black are poured into a main powdering chamber of the carbon black pulverizer to be recycled.

And the small-particle carbon black ring opening of the screening tank IV is used as an output port of the small-particle carbon black, and is a qualified carbon black product.

Has the advantages that: compared with the prior art, the invention realizes the dust treatment of the carbon black, screens the carbon black in a grading way, screens massive carbon black and large-particle carbon black, then pours the carbon black into the main powdering chamber of the carbon black pulverizer, pours the secondary carbon black into the secondary powdering chamber, improves the working efficiency of the carbon black powdering machine, and integrally improves the utilization rate of carbon black resources.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic structural view of a primary dust-collecting screening device of the present invention;

FIG. 3 is a structural bottom view of the primary dust-collecting screening can of the present invention;

FIG. 4 is a schematic structural view of a secondary screening apparatus of the present invention;

FIG. 5 is a schematic structural view of a second screening tank of the present invention;

FIG. 6 is a schematic structural view of a third screening tank of the present invention;

FIG. 7 is a schematic structural view of a fourth screening tank of the present invention;

FIG. 8 is a schematic circuit diagram of the console of the present invention;

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, examples of which are shown in the drawings, wherein like reference numerals refer to like elements throughout.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, and in addition, terms such as "top end", "bottom end", "top", "bottom", "side", and the like used hereinafter are defined according to the drawings, and the shapes and positions of the respective components are not limited by the terms.

FIG. 1 is a schematic view of the overall structure of the apparatus of the present invention, which provides a carbon black classifying and screening apparatus comprising

The primary dust collection screening device 100 comprises a dust collection screening tank 101, a first spiral pipeline 102 and a first air compressor 103, and is used for removing dust and performing primary grading screening on carbon black particles;

the secondary screening device 200 comprises a second screening tank 210, a third screening tank 220 and a fourth screening tank 230 and is used for further screening carbon black particles;

and the console 300 is used for displaying the value of the tachometer and controlling the output power of the air compressor of the system.

After the carbon black is granulated, particles with different sizes and containing dust need to be treated to remove the carbon black dust, the particles are classified and screened, so that the screened carbon black particles are basically maintained in a grade size, and unqualified large-particle carbon black and agglomerated carbon black are poured into a carbon black pulverizer to be further pulverized so as to be recycled.

FIG. 2 is a first-stage dust-absorbing screening apparatus of the present invention, which comprises a dust-absorbing screening tank 101, a first spiral pipe 102 and a first air compressor 103, for dust removal and preliminary screening of carbon black particles.

The top of the dust-absorbing screening tank 101 is provided with an inlet 104 for pouring the target carbon black into the dust-absorbing screening tank for dust removal and screening.

FIG. 3 is a bottom cross-sectional view of the primary vacuum cleaner screening apparatus of the present invention.

The bottom is provided with a large particle discharge port 105, a secondary particle discharge port 106, and a small particle discharge port 107. The large particle discharge port 105 is positioned in the center of the bottom, and large particles and blocky carbon black are discharged from the discharge port and then enter a second screening tank 210 of the secondary screening device; a secondary particle discharge port 106 is provided next to the large particle discharge port 105, from which the secondary particle carbon black is discharged into the third screening tank 220 of the secondary screening apparatus; the small particle outlet 107 is next to the secondary particle outlet 106 from which the small particle carbon black is discharged into the screen tank four 230 of the secondary screening apparatus.

The upper part of the dust collection screening tank is provided with a dust collection cavity 108, the lower part is provided with a screening cavity 109, and the dust collection cavity 108 is connected with the screening cavity 109 through a communicating cavity 110. A first spiral pipeline 102 is arranged in the pipe wall of the dust collection screening tank, the first spiral pipeline 102 is communicated with a dust collection cavity 108 and a screening cavity 109 through a suction opening 111, and the upper end of the first rotary pipeline is connected with a first air compressor 103.

The first air compressor 103 drives air into the first spiral pipeline 102, the airflow makes high-speed spiral flow in the first spiral pipeline, the higher the airflow speed, the lower the pressure is generated, and thus, a large pressure difference is generated between the dust suction cavity 108 and the first spiral pipeline 102. The air in the cavity flows to the pipe wall and enters the first spiral pipeline 102 from the air suction port to carry away the dust suspended in the cavity.

The pipe wall of the dust collection screening tank 101 needs to bear strong pressure difference, and in order to ensure the safety of the device, the pipe wall is made of a material with good pressure resistance, preferably a steel material.

The dust-laden air flow flows in the first spiral duct 102, so that dust does not accumulate on the duct wall, the first spiral duct 102 preferably has an air inlet at the upper end, so that dust will flow downwards under the double action of the air flow and gravity and will not easily accumulate on the duct wall.

The carbon black material to be dedusted and screened is poured into the device from the pouring opening 104, and a dispersion pile 112 can be arranged at the pouring opening 104 in order to enlarge the contact area of the carbon black material and the airflow in the cavity. The dispersion pile 112 is a conical pile, the diameter of the dispersion pile is smaller than the upper diameter of the dispersion pile, the carbon black poured into the dispersion pile is scattered, and the scattered carbon black is discharged into the dust suction cavity 108. The carbon black is fully contacted with the air flow in the dust suction cavity 108, and the air flow brings the dust into the first spiral pipeline 102 from the air suction port 111.

In order to prevent the scattered soot particles from falling into the air inlet 111 and entering the first spiral duct 102, a filter screen 113 may be disposed on the air inlet 111, and the soot particles with resistance value enter the first spiral duct 102, while the dust will be carried away by the air flow from the air inlet 111 and finally enter the dust collecting device along with the air flow from the air outlet 117.

To ensure sufficient duration of the action of the air flow and the carbon black within the dust collection chamber 108, the height of the dust collection chamber 108 should be set to a sufficient height. The height is not enough, the action time of airflow and carbon black is not sufficient, and the dust collection is not thorough; the height is too high, the cost of the device is high, the action time of the air flow and the first spiral pipeline is prolonged, the resistance is increased, the power of the first air compressor 103 is increased along with the action time, and the load is large. The height of the dust suction chamber 108 is preferably 1.5 m, and the dust suction is sufficient, and the air compressor 103 is also operated at rated power.

Further, the diameter of the dust suction chamber 108 can be set to 1 meter, and the space meets the requirement of sufficient action of the carbon black and the air flow.

The soot material that is sufficiently vacuumed will fall into the lower screening chamber 109. Due to the existence of the dispersing pile 112, carbon black particles are scattered in the dust suction cavity 108, collide with the inner wall and fall under the action of gravity, so that the particles can smoothly enter the screening cavity 109 after falling, the connection part of the dust suction cavity 109 and the communicating cavity 110 can be set to be a chamfer angle, and preferably forms an included angle of 60 degrees with the horizontal plane, thereby ensuring that all carbon black particles fall into the screening cavity 109.

The carbon black particles falling into the screening chamber 109 are also subjected to the pressure difference between the chamber and the first spiral conduit 102. The mass of the carbon black particles will be different according to the carbon black particles, the wind force applied to the carbon black particles is almost the same, and the mass, that is, the size of the carbon black particles is the determining factor of the motion effect, so that the carbon black particles will generate different accelerations in the horizontal direction. Because the height of screening chamber 109 is certain, the whereabouts time of carbon black granule is unanimous almost, according to the decomposition of motion, and the horizontal displacement of the carbon black granule of different accelerations is different in the horizontal direction, and the reaction is falling into the effect of screening chamber bottom and is: large particles and lumpy carbon black will fall into the large particle outlet 105 in the center of the bottom, secondary carbon black particles will fall into the secondary particle outlet 106, and small particle carbon black will fall into the secondary particle outlet 107.

However, the soot particles that bounce off the scattered particles in the dust suction chamber 108 after hitting the inner wall and slide down the chamfer all have a horizontal velocity, which affects the screening effect of the screening chamber 109. Therefore, the horizontal velocity of the carbon black particles needs to be limited.

On the one hand, the diameter of the communicating cavity 110 can be reduced, the diameter is small, carbon black particles are bound in a small space to fully interact and then are discharged into the screening cavity 109, so that the carbon black particles in all directions collide with each other, and the speed of the carbon black particles in the horizontal direction is greatly weakened according to momentum conservation. However, if the diameter is too small, the space for the carbon black particles to flow through may be insufficient, and the carbon black particles will accumulate in the lower portion of the dust suction chamber 108. The accumulation will seriously affect the working stability of the dust suction cavity, even accidents occur; after the carbon black particles are stacked, the action force of the stacked carbon black particles on the stacked carbon black particles at the lower part can give vertical acceleration to the carbon black particles at the lower part, so that the falling time of the carbon black particles is shortened compared with the preset time, the distance in the horizontal direction is shortened, and the final screening effect is influenced. The communication chamber 110 is preferably larger in diameter.

Therefore, the diameter of the communication chamber 110 should not be set too small, preferably 0.5 m. At this time, the interaction effect between the carbon black particles is good, and the carbon black particles are not accumulated and piled up at the lower part of the dust suction cavity 108, so that the carbon black circulation between the dust suction cavity 108 and the screening cavity 109 is maintained to be stable.

On the other hand, the length of the communication chamber 110 may be lengthened. When the length of the communicating cavity 110 is longer, the binding time of the carbon black particles is longer, the interaction time is more sufficient, the interaction effect is better, but the interaction space of the screening cavity 109 is compressed if the length is too long, and the screening effect is influenced. Therefore, the length of the communication chamber 110 may be set to 0.5 m.

At this time, the length and diameter of the communicating chamber 110 will achieve the best restriction effect, providing the subsequent screening of the screening chamber 109 with carbon black particles without horizontal velocity.

Therefore, the communicating chamber 110 between the dust suction chamber 108 and the screening chamber 109 is a narrow space, and the canister body is recessed in the communicating chamber 110 in order to reflect the internal structure from the appearance of the dust suction screening canister 101 and to meet the manufacturing requirements. The action of the air flow in the first spiral pipeline 102 and the tank body can generate great torsion on the device, and the communication part is a weak link, so that the thickness of the pipe wall at the connection part is increased, and the safety of the device is ensured.

The carbon black particles falling into the screening chamber 109 will fall into the bottom of the screening chamber 109 under the dual action of gravity and air flow. Because the carbon black particles move around under the action of air pressure, the particle sizes at the positions with the same radius at the bottom are basically consistent.

Therefore, the height and diameter of the screening chamber 109 and the gas flow requirements become very strict according to the moving state of the carbon black particles.

In order to make the whole device harmonious, the diameter of the screening cavity 109 is 1.5 meters consistent with that of the dust suction cavity 108, and because the air pressure difference of the screening cavity 108, the dust suction cavity 109 and the first spiral pipeline 102 is caused by the air flow velocity in the first spiral pipeline 102, and the first air compressor 103 works under the rated power, the air flow velocity is stable, the stress of the carbon black particles in the horizontal direction is stable, and the factor influencing the carbon black particles is the height of the screening cavity 109.

Furthermore, as the main source of the gas in the screening cavity 109 is the discharge port at the bottom, the airflow entering the discharge port at the bottom influences the vertical movement of the particles, the falling time of the carbon black particles is prolonged, and the horizontal movement track of the carbon black particles can be disturbed to a certain extent, and in order to reduce the influence as much as possible, a pressure stabilizing valve 114 can be arranged at the upper part of the screening cavity 109, and when the pressure exceeds a set value, the pressure stabilizing valve 114 is opened to enable the external airflow to enter the screening cavity 109, so that the interference of the supplementary airflow from the bottom on the movement of the carbon black particles is reduced, and the screening efficiency is improved.

After a plurality of factors are fully considered, the height of the screening cavity is calculated and designed to be 1.2 meters as the optimal height according to the drop point of the carbon black particles.

The drop point of carbon black granule is predictable, sets up the discharge port position according to the drop point, and in order to guarantee that large granule and cubic carbon black can both be discharged from the large granule discharge port, the diameter of large granule discharge port is greater than the diameter of intercommunication chamber 110, preferably: the diameter of the large particle discharge port is 0.7 m; the minor diameter of the secondary carbon black discharge port is 0.8 meter, and the major diameter is 1 meter; the small diameter of the small particle discharge port is 1.1 m, and the large diameter is 1.4 m.

From the above analysis, the device has strict requirements on the working state of the air compressor-103, in order to provide a stable air flow meeting the required flow rate, so that the air flow needs to be monitored, and the measurement precision requirement is high. A first venturi tube 115 may be disposed at the inlet end of the first spiral duct 102, and a first flow meter 116 may be disposed on the first venturi tube 115 for measuring the flow rate of the air flowing in the first spiral duct 102 and feeding the measured flow rate back to the console 300. The characteristics of the first venturi tube 115 enable accurate velocity measurement requirements to be met.

And a first display meter 301 is arranged on the console and displays the flow velocity value returned by the first speed measurement meter 116 at the moment. The console is also provided with a first control knob 302, the first control knob 301 is electrically connected with the first air compressor 103, and the power of the first air compressor 103 can be controlled by rotating the first control knob 302, so that the flow rate of the air flow in the first spiral pipeline 102 is changed.

Through one-level dust absorption sieving mechanism 100, clear away the dust in the carbon black material, also carried out according to the particle size to the carbon black granule and separately tentatively collected.

Although the primary screening apparatus 100 is designed to improve the screening efficiency as much as possible, there are still accidental factors in practice. For example, the carbon black particles passing through the communicating chamber 110 may be at least partially provided with a velocity in the horizontal direction so that particles that would have fallen into the large particle discharge port 105 fall into the secondary particle discharge port 106, or carbon black particles that would have fallen into the secondary particle discharge port 106 eventually fall into the small particle discharge port 107. For example, when the airflow from the bottom of the sieving chamber 109 is unstable, the influence on the soot particles may cause the soot particles to pass through the original discharge port of the soot particles and enter the discharge port of the previous stage. For example, the boundary position between the discharge ports is blurred originally, and the boundary-crossing situation is easy to occur.

Therefore, further screening is performed by the secondary screening apparatus 200.

FIG. 4 is a schematic structural view of the secondary screening apparatus.

Second grade sieving mechanism includes:

a second screening tank 210 for removing secondary carbon black particles mixed and clamped in the large-particle carbon black;

a third screening tank 220 for removing large carbon black particles mixed and clamped in the secondary carbon black particles;

a screening tank IV 230 for removing the secondary carbon black particles mixed and clamped in the small-particle carbon black;

fig. 5 is a schematic structural view of a second screening tank 210.

The second screening tank 210 is provided with a second pouring inlet 211 at the upper part, a large particle outlet 212 and a secondary annular opening 213 at the lower part, and the second pouring inlet 211 is connected to the large particle outlet 105 of the first-stage dust collection screening device 100.

And a second spiral pipeline 214 is arranged in the side wall of the second screening tank 210, the second spiral pipeline 214 is also provided with an air inlet at the upper part, then the air flow spirally flows downwards, and screening is carried out by using the principle that the spiral flow of the air in the pipeline generates a large pressure difference between the inner cavity and the second spiral pipeline 214.

The air inlet end of the second screening tank 210 is provided with a second Venturi tube 215, the second Venturi tube 215 is connected to a second air compressor 217, and the second Venturi tube is provided with a second speed measuring meter 216.

The large-particle carbon black screened by the primary dust-absorbing screening device enters the device from the second pouring inlet 211 and moves in the horizontal direction under the action of pressure difference. The large particle carbon black will have a short horizontal offset and will be discharged from the large particle outlet 212 at the bottom, and to ensure that the large particles are discharged from the large particle outlet 212, the diameter of the large particle outlet 212 should be slightly larger than that of the inlet 211, and is related to the height of the second screening tank 210.

In order to achieve good screening effect, the height of the second screening tank 210 is set to be 1.5 meters, and the diameter of the second pouring port 211 is set to be 0.5 meter, so that the large particle outlet is set to be 0.7 meter, the small diameter of the secondary annular port 213 is set to be 0.8 meter, and the large diameter is set to be 1.0 meter according to the motion track of carbon black particles.

At this time, the diameter of the second screening tank 210 is set such that the mixed-in secondary carbon black particles do not collide with the sidewall during the movement, or may fall into the large particle outlet 212 again. The diameter of the second screening pot 210 is set to 1.1 m according to the motion track.

Through the second screening tank 210, large particles and carbon black lumps are discharged from the large particle outlet 212 at the bottom, and a small portion of the entrained secondary carbon black particles is discharged from the secondary annular opening 213.

Fig. 6 is a schematic structural view of screening tank three 220.

The third inlet 221 of the screening tank 220 is connected to the secondary particle outlet 106 of the first dust-collecting screening device 100, and the third outlet 222 and the secondary outlet 223 are provided at the lower part of the screening tank 220.

And a third venturi tube 224 is arranged at the air inlet end of the third screening tank 220 and connected to a third air compressor 226, and a third speed measuring meter 225 is arranged on the third venturi tube 224.

Because the screening of the third screening tank 220 is mainly secondary particles and the quantity of the carbon black with large particles is small, the diameter of the large-particle small outlet 222 does not need to be large, and the diameter range of the secondary ring outlet 223 needs to be enlarged, and the requirement that the diameter of the large-particle small outlet 222 is slightly larger than that of the third pouring inlet 221 is met. Thus, the diameter of the three inlet 221 is set to 0.4 m, the diameter of the large particle outlet 222 is set to 0.6 m, and the diameter of the secondary loop outlet 223 is set to 0.7 m to 1.0 m.

Fig. 7 is a schematic view of the construction of the screening tank four 230.

The upper part of the screening tank IV is provided with an inlet IV 231 which is connected to the small particle carbon black discharge port 107 of the primary dust absorption screening device 100, and the bottom of the screening tank IV 230 is provided with a secondary small outlet 232 and a qualified carbon black outlet 233.

The air inlet end of the screening tank IV 230 is provided with a venturi tube IV 234 and is connected to an air compressor IV 236, and the venturi tube IV 234 is provided with a speedometer IV 235.

Fig. 8 is a circuit connection diagram of the console 300.

The second speed measuring meter 216 and the second air compressor 217 are electrically connected with the second display meter 303 and the second control knob 304 on the console 300; the third speed measuring meter 225 and the third air compressor 226 are electrically connected with the second display meter 305 and the second control knob 306 on the console 300; the speed meter IV 235, the air compressor IV 236 are electrically connected with the display meter IV 307 and the control knob IV 308 on the console 300.

And a secondary ring outlet of the second screening tank 210, a secondary carbon black ring opening of the third screening tank and a secondary carbon black small opening of the fourth screening tank are respectively connected to four ports of the four-way pipeline, and the other end of the four-way pipeline is used as an output port of the secondary carbon black.

And the large particle outlet of the second screening tank and the large particle carbon black small opening of the third screening tank are connected to two ports of the three-way pipeline, and the other end of the three-way pipeline is used as an output port of the large particle carbon black.

And the small-particle carbon black ring opening of the screening tank IV is used as an output port of the small-particle carbon black.

Through the effect of this device, carry out the hierarchical output of dust removal and carbon black granule with carbon black material.

The modifications made on the basis of the invention are all within the scope of protection of the invention; while the invention has been shown and described with reference to certain exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A carbon black classifying screen device is characterized by comprising:

the primary dust collection screening device is used for removing dust and primarily screening carbon black particles in a grading manner, and comprises a dust collection screening tank, a first spiral pipeline and a first air compressor, wherein the first spiral pipeline is arranged in the inner wall of the dust collection screening tank, and the first air compressor is arranged at a port of the first spiral pipeline; the dust collection screening tank is provided with an air suction port communicated with the first spiral pipeline, and a fine filter screen is arranged on the air suction port; the upper part of the dust collection screening tank is provided with a dust collection cavity, the lower part of the dust collection screening tank is provided with a screening cavity, and the dust collection cavity is communicated with the screening cavity through a communicating cavity; the top of the dust collection screening tank is provided with an inclined inlet, and the bottom of the dust collection screening tank is provided with a large particle outlet, a secondary particle outlet and a small particle outlet;

2. The carbon black classifying screen apparatus according to claim 1, wherein:

the upper end of the first spiral pipeline is provided with a first Venturi tube, and a first speed measuring meter is arranged on the first Venturi tube.

3. The carbon black classifying screen apparatus according to claim 1, wherein:

a dispersing pile is arranged at the pouring inlet of the dust collection screening tank, and the dispersing pile is conical;

and a pressure stabilizing valve is arranged in the screening cavity.

4. The carbon black classifying screen apparatus according to claim 1, wherein:

the inner wall of the screening tank II is provided with a spiral pipeline II which is connected with an air compressor II;

the upper part of the screening tank II is provided with a dumping inlet II, and the bottom of the screening tank II is provided with a large-particle outlet and a secondary annular opening;

the second dumping inlet is connected to a large particle discharge port of the primary dust collection screening device.

5. The carbon black classifying screen apparatus according to claim 1, wherein:

the inner wall of the screening tank III is provided with a spiral pipeline III which is connected with an air compressor III;

the upper part of the screening tank III is provided with a pouring inlet III, and the bottom of the screening tank III is provided with a large-particle small outlet and a secondary ring outlet;

and the third pouring inlet is connected to a secondary particle carbon black discharge port of the primary dust absorption screening device.

6. The carbon black classifying screen apparatus according to claim 1, wherein:

the inner wall of the screening tank IV is provided with a spiral pipeline IV, and the spiral pipeline IV is connected with an air compressor IV;

the upper part of the screening tank IV is provided with a tilting inlet IV, and the bottom of the screening tank IV is provided with a secondary small outlet and a qualified outlet;

the four pouring inlets are connected to a small-particle carbon black discharge port of the primary dust-absorbing screening device.