CN215744118U - Star-shaped electrode for electrostatic dust collection of belt type conveying equipment and electrostatic dust collection system - Google Patents

Abstract

The embodiment of the utility model provides a star-shaped electrode and an electrostatic dust removal system for electrostatic dust removal of belt type conveying equipment, wherein the belt type conveying equipment comprises a conveying belt for conveying articles with dust, and the dust of the articles with dust is inhibited through an electrostatic dust suppression device; the electrostatic dust suppression device is characterized by comprising a star-shaped cathode, an insulation component and a metal cylinder body serving as an anode, wherein the metal cylinder body is covered above the conveying belt; the star-type cathode is arranged in the metal cylinder body and is connected to the metal cylinder body through the insulation assembly; the star-type cathode is a star-shaped metal plate, and the star-shaped metal plate is parallel to the cross section of the metal cylinder; the star-shaped metal plate has a plurality of sharp corners, each sharp corner being provided with a copper-clad tip. In the electrostatic dust removal system, the copper-coated tip surface of the cathode is covered with copper, and charged dust particles can not react with the copper to form small balls on the sharp corners during discharging, so that the sharp corners of the electrode can not be consumed, and the tip discharging of the electrode is ensured.

Description

Star-shaped electrode for electrostatic dust collection of belt type conveying equipment and electrostatic dust collection system

Technical Field

The utility model relates to the field of dust removal, in particular to a star-shaped electrode for electrostatic dust removal of belt type conveying equipment and an electrostatic dust removal system.

Background

In the industries of ore transportation, ore crushing, ore dressing, cement, thermal power generation, sintering and the like where powder or crushed materials are transported, a belt conveyor is usually adopted for transporting the materials, so that dust often floats in the air and the air pollution is very serious. The materials are usually dedusted during the transport by the belt conveyor.

In the process of implementing the utility model, the applicant finds that at least the following problems exist in the prior art:

when the humidity of the materials conveyed by the belt conveyor is higher, the dust removal effect is poor at present.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a star-shaped electrode for electrostatic dust removal of belt type conveying equipment and an electrostatic dust removal system.

In order to achieve the above object, an embodiment of the present invention provides a star electrode for electrostatic dust removal of a belt conveyor apparatus, the belt conveyor apparatus including a conveyor belt that conveys articles with dust, the dust of the articles with dust being suppressed by an electrostatic dust suppression device; the electrostatic dust suppression device comprises a star-shaped cathode, an insulation assembly and a metal cylinder body as an anode, wherein the metal cylinder body is covered above the conveyer belt; the star-type cathode is arranged in the metal cylinder body and is connected to the metal cylinder body through the insulation assembly;

the star-shaped cathode is a star-shaped metal plate, and the star-shaped metal plate is parallel to the cross section of the metal cylinder;

the star-shaped metal plate is provided with a plurality of sharp corners, and each sharp corner is provided with a copper-clad tip.

Preferably, each sharp corner of the star-shaped metal plate is a sharp corner with two sides having a real intersection point; the copper-clad tip comprises the solid intersection points, and a pattern formed by the connecting lines of the solid intersection points of each sharp angle is a perfect circle or an ellipse.

Preferably, the number of the sharp corners of the star-shaped metal plate is 8-11.

Preferably, the star-shaped metal sheet has a number of points of 8, 9, 10 or 11.

Preferably, the surface of the star-shaped metal plate except the copper-clad tip is provided with an anticorrosive coating, and/or the inner side of the metal cylinder is coated with a non-conductive film.

Preferably, the method further comprises the following steps: a vibrator arranged on the metal cylinder body and used for vibrating the metal cylinder body.

Preferably, the star-shaped metal plate is made of weathering steel.

Preferably, the metal cylinder is formed by sequentially connecting a plurality of metal cylinder sections, and the axes of the plurality of metal cylinder sections are overlapped;

the star-shaped cathodes are connected in series, the two star-shaped cathodes are connected to one section of metal cylinder section through the same insulating assembly, and the two star-shaped cathodes are connected to the metal cylinder section except for two ends through the same insulating assembly;

wherein, the distance between the two star type cathodes is 300-600 mm.

Preferably, the electrostatic dust suppression device comprises a plurality of insulating components arranged at equal intervals.

In order to achieve the above object, the present invention further provides an electrostatic dust removal system with star electrodes for belt conveyor equipment, which is characterized by comprising an electrostatic dust suppression device with an insulation component; the electrostatic dust suppression device with the insulation component comprises a metal cylinder, a conveyer belt and any star-shaped cathode, wherein the metal cylinder is covered above the conveyer belt; the star-shaped cathode is arranged in the metal cylinder;

the electrostatic dust suppression device with the insulation assembly further comprises: and the star-type cathode is connected to the metal cylinder through the insulating assembly.

The technical scheme has the following beneficial effects: in the electrostatic dust removal system, copper covers the surface of the copper-coated tip of the star-shaped cathode sharp corner, and dust particles after charging do not react with the copper to form small balls on the sharp corner during discharging, so that the sharp corner of the electrode is not consumed, and the tip of the electrode is ensured to be discharged.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a front view of a star electrode (disposed in an electrostatic precipitator system of a belt conveyor apparatus) in accordance with an embodiment of the present invention;

fig. 2 is a schematic view of a star-shaped metal plate 31 of an embodiment of the present invention;

FIG. 3 is an enlarged axial view of the star electrode and metal cylinder of an embodiment of the present invention;

FIG. 4 is a front view of FIG. 3;

FIG. 5 is a left side view of FIG. 4;

FIG. 6 is an enlarged axial view of another star electrode and metal cylinder according to an embodiment of the present invention;

FIG. 7 is a front view of FIG. 6;

FIG. 8 is an enlarged axial side view of a third star electrode and metal cylinder in accordance with an embodiment of the present invention;

FIG. 9 is a front view of FIG. 8;

FIG. 10 is a left side view of FIG. 8;

FIG. 11 is a full front view of FIG. 8 (collectively composed of views (a) and (b));

FIG. 12 is a cross-sectional view A-A of FIG. 11;

fig. 13 is a cross-sectional view B-B of fig. 12.

The reference numerals are represented as:

3. a star cathode; 4. a vibrator; 5. a metal cylinder; 6. a conveyor belt; 104. an insulating assembly; 31. a star-shaped metal plate; 32. coating copper on the tip;

1. a conveyor belt transfer rack; 2. a viewing port; 7. a baffle; 8. a sealing plate; 9. a positive pressure hood; 10. an insulator; 11. Perlite filler; 12. a high voltage lead; 13. a gas delivery pipe; 14. a connecting rod; 15. a support frame; 16. a negative plate connecting pipe; 101. a dust locking chamber; 102. a transition box; 107. a water vapor control box; 108. a main tracheal tube; 109. a water main; 110. An atomizing spray head; 114. protecting the skin; 115. a leather protection layering; 116. a bolt; 118. clamping the bracket; 119. a protective bracket; 120. A vibrator support; 121. an electric control cabinet; 122. a high voltage output line.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.

As shown in fig. 1 to 13, in connection with the embodiment of the present invention, there is provided a star electrode for electrostatic dust removal for a belt conveyor apparatus including a conveyor belt 6 that conveys articles with dust, the dust of the articles with dust being suppressed by an electrostatic dust suppressing device; the electrostatic dust suppression device comprises a star-shaped cathode 3, an insulation component 104 and a metal cylinder 5 serving as an anode, wherein the metal cylinder 5 is covered above the conveyer belt 6; the star-shaped cathode 3 is arranged in the metal cylinder 5, and the star-shaped cathode 3 is connected to the metal cylinder 5 through the insulation assembly 104; the star-shaped cathode 3 is a star-shaped metal plate 31, and the star-shaped metal plate 31 is parallel to the cross section of the metal cylinder 5; the star-shaped metal plate 31 has a plurality of pointed corners, each of which is provided with a copper-clad tip 32. Belt conveying equipment has the article of dust through the transportation of conveyer belt 6, conveyer belt 6 can produce great vibrations in service, adopt star metal sheet 31 as the electrode, the electrode has fine rigidity, it is more firm, it follows the deformation that produces in the 6 vibrations of conveyer belt and diminishes, can guarantee the interval between negative pole and the positive pole under vibrations, so avoid colliding with positive pole (metal barrel 5), can not cause the short circuit, it is less than the technique that the negative pole produced big deformation probably causes the short circuit to adopt the rigidity ratio line electrode to be poor among the prior art to avoid.

The copper-clad tip 32 is located at the tip of the tip and comprises the tip, the surface of the copper-clad tip 32 is covered with copper, the tip is the tip, and the surface of the tip at the tip is subjected to copper-clad treatment. Because the dust contains iron ore components, charged dust particles can react with iron in the iron ore components during discharging to form small balls on sharp corners; if the sharp corner is made of iron or steel, the iron or steel on the sharp corner can be consumed, so that the sharp corner disappears, and the point discharge efficiency is influenced. However, if the surface of the sharp corner tip is copper, charged dust particles cannot react with the copper during discharging, small balls are formed on the sharp corner, and the sharp corner of the electrode cannot be consumed. And, the charged dust particles react with iron in the iron ore component during discharge, and the amount of the charged dust particles adhering to copper is also reduced because the included angle is copper.

Preferably, each sharp corner of the star-shaped metal plate 31 is a sharp corner with a solid intersection point on two sides, and the sharp point is the solid intersection point; the copper-clad tip 32 comprises the solid intersection points, the graph formed by the connecting line of the solid intersection point of each sharp angle is a perfect circle or an ellipse, the star-shaped cathode discharge capacity with a plurality of sharp angles is stronger than the discharge capacity of a single electrode wire, and if a plurality of wires form an electrode row, the assembly of the electrode row or the matching of the electrode row and the cylinder are complex in a metal cylinder. If the prickle electrodes are adopted, the volume is smaller than the discharge capacity, so that a large number of prickle electrodes are needed, and the management of spare parts is not facilitated. The star-shaped metal plate 31 of the present invention has good rigidity, simple shape, and small space span, and thus can match the shape of the metal cylinder 5. The shape is simple, and spare parts can be easily managed. The distance (discharge distance) between the discharge point and the metal cylinder 5 is adjusted according to the calibrated environment, the dust type and the electric field intensity, a distance system is formed, so that the discharge is easy to occur, the breakdown between the cathode and the anode is avoided, and the stable corona is formed on the sharp corner, so that the better discharge efficiency is obtained.

Preferably, the number of the sharp corners of the star-shaped metal plate 31 is 8-11, so that good discharge efficiency is obtained. The number of the star sharp corners is measured and calculated, so that the discharge influence among the sharp corners is eliminated, and meanwhile, the multi-cathode arrangement is realized. The cathode is in a star shape and has a plurality of sharp corners, and the plurality of sharp corners of the star-shaped cathode 3 form a plurality of electrodes which realize annular discharge. In order to achieve the best discharge effect, the metal cylinders 5 with different diameters have a certain relation with the number of the sharp corners of the star-shaped cathode 3, a large amount of experimental measured data is calculated through a regression equation, and then various verifications are carried out, so that the number of the sharp corners of the star-shaped metal plate 31 is 8-11, and the best discharge efficiency is obtained.

Preferably, the star-shaped metal plate 31 has a number of points of 8, 9, 10 or 11.

Preferably, the surface of the star-shaped metal plate 31 except the copper-clad tip 32 is provided with an anticorrosive coating, the anticorrosive coating is a non-conductive film or a zinc coating, and the non-conductive film or the zinc coating is attached to the electrode, so that dust adhesion on the electrode is reduced, mainly to iron ores, which are conductors. The inner side of the metal cylinder 5 is coated with a non-conductive film to reduce dust adhesion on the electrode, mainly to iron ores which are conductors, so that the discharge performance of the electrode is improved.

Preferably, the method further comprises the following steps: a rapper 4 provided on the metal cylinder 5 for rapping the metal cylinder 5, more precisely rapping the metal cylinder 5 by means of the rapper 4 to shake off dust. The rapping device 4 functions as: the rapping device 4 is arranged on the rapping device bracket 120, when more dust particles are adsorbed in the metal cylinder 5 and can not fall off naturally, the dust particles are shaken off from the metal cylinder 5 by the rapping device 4, the insulation component 104 is driven by the vibration of the metal cylinder 5, and the insulation component 104 drives the star cathode 3 to vibrate to shake off the dust on the star cathode 3.

In order to ensure the discharging effect, the electrodes (star type cathode 3) and the anode (metal cylinder 5) are periodically cleaned. The space formed by the metal cylinder 5 and the star-shaped cathode 3 is relatively small. Therefore, the vibrator 4 is arranged on the outer side of the metal cylinder 5, the vibrating anode is adopted as an ash removal mode, the vibration of the metal cylinder 5 is transmitted to the star-type cathode 3, and a counter electrode (the star-type cathode 3) and an anode (the metal cylinder 5) ash removal device are not arranged inside the metal cylinder 5 and the star-type cathode 3, so that the sizes of the star-type cathode 3 and the metal cylinder 5 are reduced, the firmness of the star-type cathode 3 and the metal cylinder 5 is ensured, and the discharge effect is also ensured.

Preferably, the material of the star-shaped metal plate 31 is weathering steel. The material of the weathering steel is easy to obtain and low in cost, the discharge effect is better than that of plain carbon steel (Q235) and stainless steel in the same environment, the current of the electrode is obviously high after high voltage is loaded, and the data obtained through experiments show that the working current of the weathering steel electrode is 15-20% higher than that of the plain carbon steel and the stainless steel, and the working current of the electrode is large, which means that the discharge effect is good; the cost of the weathering steel is cheaper than that of stainless steel and is closer to that of plain carbon steel; therefore, the weathering steel has the advantages of low cost and good discharge effect. In addition, the weathering steel contains copper and higher phosphorus, and has obvious advantages on an electric field after solid solution.

Preferably, the metal cylinder 5 is formed by sequentially connecting a plurality of metal cylinder sections, and the axes of the plurality of metal cylinder sections are overlapped; the device comprises two star-shaped cathodes 3 connected in series, wherein the two star-shaped cathodes 3 connected in series are connected to one metal cylinder section through the same insulating assembly 104, and the two star-shaped cathodes 3 connected in series are connected to the metal cylinder section except for two ends through the same insulating assembly 104; wherein, the distance between the two star-type cathodes 3 is 300-600 mm.

Namely, a double-electrode structure is adopted in the same electrostatic dust suppression device, two star-shaped cathodes 3 are connected in series, and the distance between the star-shaped cathodes 3 is 300-600 mm. When a star-type cathode 3 is adopted, the electric field formed by the star-type cathode and the metal cylinder 5 is not wide enough to completely ionize at the advancing speed of dust. Since the initial velocity of the conveyor belt 6 is typically 1.6m/s to 2.0m/s, the initial velocity of the dust is also high, the dust particles are sufficiently charged within a length of less than 10 meters (limited by the belt installation environment), i.e., within 10 seconds, whereas the range of the electric field formed by the single electrode (the star cathode 3) is weak and cannot be sufficiently charged within 10 seconds. The distance between the stars is 300-600mm (the specific value is adjusted according to the dust type and the environment condition), which ensures that the sharp angles of the two star cathodes 3 will not interfere with each other when discharging, and an expanded electric field range can be formed, the control range of a single star cathode 3 is about 300-400mm, and the control range of two star cathodes 3 is about 800mm, so the electric field range is expanded, and a relatively large charge space is left for dust particles. That is, the number of the single star-like cathode 3 is adjusted according to the dust type and the belt speed, and the single star-like cathode 3 corresponds to the number of the anode cylinder, generally, for example, 7 anode cylinder sections, then the middle 5 sections adopt the series connection double electrode arrangement, and the two sections at the two ends adopt the single electrode arrangement. Since both ends may be connected to other equipment, it is considered to reduce the overall load.

Preferably, the electrostatic dust suppression device includes a plurality of insulation assemblies 104 arranged at equal intervals. Preferably three sets of electrostatic dust suppression devices, namely preferably three insulation assemblies 104 and 6 star-shaped cathodes 3 are arranged at different positions of the electrostatic dust removal system of the belt conveyor equipment, so that the electric field space is further enlarged.

In combination with an embodiment of the present invention, there is also provided an electrostatic precipitator system with star electrodes for a belt conveyor, including an electrostatic precipitator device with an insulating assembly; the electrostatic dust suppression device with the insulation component comprises a metal cylinder 5, a conveyer belt 6 and any star-shaped cathode 3, wherein the metal cylinder 5 is covered above the conveyer belt 6; the star-shaped cathode 3 is arranged in the metal cylinder 5;

the electrostatic dust suppression device with the insulation assembly further comprises: the star-shaped cathode 3 is connected to the metal cylinder 5 through the insulating assembly 104.

The conveyer belt 6 is arranged on the conveyer belt conveying frame 1 and used for conveying ore, cement and the like, and the conveyer belt 6 is used for conveying ore, cement and the like. The air will now have airborne particles of these materials floating therein. The metal cylinder 5 covers the conveyer belt 6, namely covers the ore, the cement and the like, so that dust particles floating in the air of the ore and the cement can be blocked in the metal cylinder 5, and a semi-closed cavity is formed. The electrostatic dust suppression device with the insulating assembly is supported on the conveyor carousel 1 by a support frame 15.

The metal cylinder 5 is covered above the conveying belt 6 to form a semi-sealed cavity with the conveying belt 6; the star-shaped cathode 3 is arranged in the semi-sealed cavity, and the star-shaped cathode 3 is connected to the metal cylinder 5 in an insulated manner; the device also comprises a direct current power supply which can be a high-voltage direct current power supply, two poles of the power supply are respectively connected with the metal cylinder 5 and the star cathode 3 through a high-voltage lead 12, the metal cylinder 5 and the star cathode 3 (also called as a corona electrode) are not communicated, no current is generated, and a high-voltage electric field can be generated between the metal cylinder 5 and the star cathode 3. The dust particles floating in the metal cylinder 5 are removed by the principle of electrostatic adsorption.

Because the cathode electrode generates corona discharge and the gas is ionized, at the moment, negatively charged gas ions move towards the metal cylinder 5 under the action of the electric field force and collide with floating dust particles in the movement, the negatively charged gas ions charge the dust particles with negative electricity, the charged dust particles move towards the metal cylinder 5 under the action of the electric field force and emit charged electrons after reaching the metal cylinder 5, the dust particles are deposited on the metal cylinder 5, and the purified gas is discharged out of the dust suppression device, namely, is discharged out of a dust removal system insulated by the electrode, so that the dust particles floating in the air are greatly reduced.

The electrostatic dust suppression device with the insulation assembly further comprises: the star-shaped cathode 3 is connected to the metal cylinder 5 through the insulating assembly 104; the short circuit between the star cathode 3 and the metal can 5 can be prevented by the insulating member 104. Especially, when the humidity of the transported material is high (for example, 80% to 99%), if the insulating assembly 104 is not used, the wet dust particles are easily and continuously adhered to the star-shaped cathode 3 and/or the metal cylinder 5, so that the star-shaped cathode 3 and/or the metal cylinder 5 have a net charge creepage phenomenon, when the accumulated wet dust particles are large enough, the star-shaped cathode 3 and the metal cylinder 5 are short-circuited, and in a serious case, the accidents of striking fire, drawing arc and burning out are caused. Therefore, the star-type cathode 3 is connected to the metal cylinder 5 through the insulating assembly 104, and the star-type cathode is isolated from the metal cylinder 5, so that the accidents can be avoided, the dust suppression device can work normally, and the electrode-insulated dust removal system works normally.

Star negative pole 3 is star metal sheet 31, star metal sheet 31 has a plurality of closed angles, every closed angle has copper-clad tip 32, copper-clad tip 32 is located the pointed point department of closed angle and includes the closed point, copper-clad tip 32 surface covering has copper, closed angle that is the closed angle department, and the closed angle surface of closed angle department is covered with copper and is handled. Because the dust contains iron ore components, charged dust particles can react with iron in the iron ore components during discharging to form small balls on sharp corners; if the sharp corner is made of iron or steel, the iron or steel on the sharp corner can be consumed, so that the sharp corner disappears, and the point discharge efficiency is influenced. However, if the surface of the sharp corner tip is copper, charged dust particles cannot react with the copper during discharging, small balls are formed on the sharp corner, and the sharp corner of the electrode cannot be consumed. And, the charged dust particles react with iron in the iron ore component during discharge, and the amount of the charged dust particles adhering to copper is also reduced because the included angle is copper.

Also, the electrostatic dust suppression device is mounted on a protective bracket 119 (the protective bracket 119 is connected by a bracket clasp 118). The lower end of the metal cylinder 5 is also provided with a sheath 114, and the sheath 114 is fixed at the lower end of the metal cylinder 5 through a sheath pressing strip 115 and a bolt 116.

When the electrode insulation dust removal system works, ore, cement and the like are conveyed to enter the electrode insulation dust removal system from the on-site blanking port and usually directly enter the metal cylinder 5. Of course, according to the requirement of dust removal, before entering the metal cylinder 5, the transition box 102 is arranged below the field blanking port, and the ore, the cement and the like firstly enter the transition box 102 and then enter the metal cylinder 5. The transition box 102 is connected to the electrostatic dust suppression device with the insulation component; the transition box 102 comprises a dust locking chamber 101, an atomizing spray head 110 and a water vapor control box 107 which is arranged outside the dust locking chamber 101 and is used for controlling the atomizing spray head 110; the metal cylinder 5 is provided with a first port, the dust locking chamber 101 is connected to the first port of the metal cylinder 5, and the atomizing nozzle 110 is arranged at the top of the inner side of the dust locking chamber 101. In the transition box 102 there is a dust lock chamber 101 for the preliminary collection of dust from ore, cement, etc. An atomizing nozzle 110 is arranged at the top end inside the transition box 102, so that a part of dust can fall downwards, and the mist spraying of the atomizing nozzle 110 is controlled by the steam control box 107. Water is provided to the system through water header 109. System power is delivered through high voltage output line 122; and; the system control is controlled by the electric elements in the electric control cabinet 121.

Preferably, the system further comprises a health management system, which receives the working parameters of the dust removal system during working and pre-judges the probability of the occurrence of the fault of the dust removal system according to the received working parameters of the dust removal system during working. The operating parameters include voltage and current, with current being the dominant. Specifically, the total voltage and the total current of the system are compared, and all units are also compared. Also including the voltage and current of the star-shaped metal plate 31. When the current and voltage are reduced, the discharge efficiency is reduced, and the damage of parts or dust accumulation is possible. The specific decision depends on the algorithm. The time for acquiring data is adjusted according to specific conditions, for example, data is acquired once in 5 minutes, data is transmitted once in one hour, and the working parameters are acquired through corresponding sensors; the health management system compares various working parameter values with respective limit values or comprehensively considers a plurality of working parameter values to pre-judge the possible faults of the electrode-insulated dust removal system, so that the faults can be processed in advance to avoid occurring, or a coping scheme can be proposed in advance when the faults occur to solve the processing in time.

Preferably, a dust suppression space for suppressing dust airflow is formed by the running conveying belt 6 and the metal cylinder 5; the section shape of the metal cylinder 5 is changed according to a set rule along the running direction of the conveyer belt 6, and the conveyer belt 6 runs within a preset speed range; during the operation of the conveyor belt 6, the pressure of the dust suppression space is changed along with the change of the section shape of the metal cylinder 5, and the dust is disturbed to move along the track of the initial speed direction of the conveyor belt 6. (dust obtains the initial velocity because of the belt motion, so want to manage the dust, except letting dust charged, can also make the influence on dust in the speed, dust before charging, when conveyer belt 6 initial velocity is below 2 meters/second, can fly more than 200 CM. metal cylinder 5 is the positive pole on the one hand, on the other hand metal cylinder 5 shape under the air current effect that conveyer belt 6 drove, also can form an air current field, cause the change of pressure, cause the interference to the flight route of dust along conveyer belt 6 direction, so metal cylinder 5 shape must consider the area of positive pole, site installation's position, also must consider the interference to dust.

Preferably, the insulation assembly 104 comprises: the positive pressure shield comprises a positive pressure shield body 9 (also called a positive pressure environment shield), a sealing plate 8, an insulator 10 and a gas pipe 13 (positive pressure gas is provided by a gas pipe main pipeline 108) for conveying positive pressure gas, wherein the positive pressure shield body 9 is covered on the sealing plate 8; the insulator 10 is made of silica gel.

The positive pressure hood body 9 has a hood top and a hood wall connected to the hood top, and the hood wall is located below the hood top. The sealing plate 8 is connected to the cover wall of the positive pressure cover body 9 without a gap, and the sealing plate 8 and the cover wall of the positive pressure cover body 9 form a positive pressure airflow cavity; the positive pressure gas flow cavity is positioned between the star-shaped cathode 3 and the cover top; that is, the sealing plate 8 is used to seal the space between the cover top of the positive pressure cover body 9 and the sealing plate 8, so that the sealing plate 8 and the cover wall of the positive pressure cover body 9 form a small sealed space (positive pressure airflow chamber), wherein the pressure of the positive pressure airflow is greater than 2kg, and is generally provided by the positive pressure cover body 9.

The insulator 10 is connected to the metal cylinder 5, and the insulator 10 is arranged below the cover top of the positive pressure cover body 9, above the lower edge of the positive pressure airflow region and in the side edge of the positive pressure airflow region, such as between the sealing plate 8 and the cover top; namely, the insulator 10 vertically penetrates through the top of the positive pressure cover body 9, so that the metal cylinder 5 and the star-shaped cathode 3 can be isolated in an insulating manner, and the star-shaped cathode 3 and the metal cylinder 5 cannot form a current path.

The sealing plate 8 and the cover wall of the positive pressure cover body 9 positioned below the sealing plate 8 form a positive pressure airflow cavity; the positive pressure airflow cavity is positioned between the star-shaped cathode 3 and the sealing plate 8.

The gas pipe 13 is provided with a gas inlet end and a gas outlet end, positive pressure gas is provided through a main gas pipe, the gas outlet end is arranged in the positive pressure gas flow cavity and is positioned below the sealing plate 8, and positive pressure gas discharged from the gas outlet end of the gas pipe 13 forms a positive pressure gas flow area in the positive pressure gas flow cavity below the sealing plate 8.

When the system operates, when the positive pressure gas is continuously conveyed into the positive pressure gas flow region through the gas pipe 13, the positive pressure gas (compressed gas) is discharged through the exhaust end of the gas pipe 13 below the sealing plate 8 because the pressure of the positive pressure gas is greater than a standard atmospheric pressure, and the clean positive pressure gas is gathered below the sealing plate 8 to form a protective gas curtain, so that the formed positive pressure clean air small environment is formed. The high-humidity dirty air (with standard atmospheric pressure close to atmospheric pressure) can not enter the sealed space between the sealing plate 8 and the cover top, so that the process and the way of continuously bonding dust on the star-type cathode 3 and/or the metal cylinder 5 are thoroughly prevented, the path of short circuit between the cathode and the anode caused by static charge creepage is finally eliminated, and the problem of insulating damage caused by ignition, arc discharge and burning is solved. From the field experiment process, the electrostatic field constructed by the cathode and the anode which are supported and connected by the insulating component 104 has obvious electrostatic dust suppression effect under the high-humidity working condition, stable and reliable operation and long service life, even if the cathode electrode is sprayed with water, the damage can not be caused, the damage of the whole electrostatic dust suppression device can not be caused, the dust suppression effect in the material conveying process of a belt conveyor (conveying belt) is ensured, and the environmental protection requirement is met.

Preferably, one end of the insulator 10 is connected to the metal cylinder 5, and the other end of the insulator 10 is disposed in the positive pressure housing 9 and between the sealing plate 8 and the housing top. Or, one end of the insulator 10 is connected to the metal cylinder 5 and is disposed on the lower edge of the positive pressure gas flow region below the sealing plate 8 and in the side edge of the positive pressure gas flow region. Or, one end of the insulator 10 is connected to the metal cylinder 5, and the other end of the insulator 10 is located at the lower part outside the positive pressure gas flow area. The insulation between the metal cylinder 5 and the star-type cathode 3 is realized through the change of the connection position of the other end of the insulator 10. The connecting rod 14 is sleeved in the insulator 10.

Preferably, the insulation assembly 104 further comprises a baffle 7, the baffle 7 is arranged in the positive pressure hood 9 and connected to the hood wall of the positive pressure hood 9, and the baffle 7 is arranged below the sealing plate 8; the guide plate 7 is provided with a guide hole, and the guide hole is arranged in the vertical direction. When the internal components of the electrostatic dust suppression device are overhauled or the air pressure of positive pressure air does not meet the use requirement and fails, the guide plate 7 can prevent external dust from entering the positive pressure air flow region less. In addition, the guide plate 7 is provided with guide holes to flow outwards, the guide plate 7 gathers clean positive pressure gas to further form a protective air curtain (especially when the guide holes are uniformly distributed, the positive pressure airflow blown out through the guide holes is uniform, and the forming speed of the air curtain is high), so that high-humidity dirty air and insulating surfaces (connecting rods 14) and the cover body are further prevented, namely, the gas with dust particles (high-humidity dirty air) cannot enter the positive pressure airflow region from the guide holes and further cannot flow into a small sealed space in the sealing plate 8 and the positive pressure cover body 9, and a small positive pressure clean air environment is formed.

Preferably, the heat insulation plate also comprises a heat insulation layer attached to the surface of the flow guide plate 7, and the heat insulation layer is perlite filling material 11. In some high temperature environments, the perlite filler 11 blocks heat conduction, and high and low temperature gases are prevented from condensing into water drops after meeting, so that the reduction of the insulating property caused by the conduction of the water drops is avoided.

Preferably, the insulator 10 has a plurality of horizontal insulating sheets arranged at vertical intervals, so that the insulating property is improved, the electric conduction is avoided, and the dust is prevented from entering.

Preferably, the temperature control device further comprises a temperature control part for adjusting the temperature of the positive pressure gas entering the air inlet end of the air conveying pipe 13, and the temperature control part is arranged at the air inlet end of the air conveying pipe 13. Under the condition that the inlet end appears the condensate water, be used for adjusting the temperature of the air of inlet end through the piece that adjusts the temperature, specifically be: hot air (temperature range >70 ℃) is blown into the air inlet end through the temperature adjusting piece under certain air pressure, so that water is not formed in the positive pressure air flow zone.

Preferably, the positive pressure cover body 9 is a barrel-shaped body, so that the gas flow rate in the positive pressure gas curtain in the positive pressure gas flow cavity is equal, the gas curtain is stable, the axis of the barrel-shaped body is vertical, the guide plate 7 is perpendicular to the axis of the barrel-shaped body, the positive pressure gas flowing out of the guide plate 7 can be directly blown to the dust particles, the gas flow of the gas curtain is also in the vertical direction without inclination, when the star-shaped cathode 3 is a plurality of dispersed cathode plates, and when the star-shaped cathode 3 is also vertically arranged, the dust particles are gathered on the negative plate opposite to each other due to the inclination of the cathode plate of the gas curtain, so that the concentration is increased and the possibility that the dust particles are counted in the positive pressure gas flow region is increased. Therefore, the positive pressure cover body 9 is a barrel-shaped body, the axis of the barrel-shaped body is vertical, and the guide plate 7 is perpendicular to the axis of the barrel-shaped body, so that dust particles directly below the guide plate 7 cannot enter the space of the positive pressure cover body 9 above the sealing plate 8, and the dust particles can be maximally suppressed.

Preferably, the air inlet end of the air pipe 13 is arranged outside the metal cylinder 5, the air inlet end of the air pipe 13 penetrates through the top of the positive pressure cover body 9, the air outlet end of the air pipe 13 penetrates through the sealing plate 8 and enters the positive pressure air flow region, and the air pipe 13 is parallel to the axial direction of the barrel body. The positive pressure airflow pressure can not generate other components from input to output, and the pressure except the normal loss is completely transmitted into the positive pressure airflow region, so that the pressure of the positive pressure gas is fully used. The forming speed of the positive pressure gas curtain is ensured, and the continuous stability of the gas curtain is maintained in the whole process of positive pressure gas entering, so that external dust particles are tightly blocked outside and do not enter the insulating component 104, the dust particles cannot be adhered to the connecting star-type cathode 3 and/or the metal cylinder 5, and the net charge creepage phenomenon cannot occur.

Preferably, the gas-supply pipe 13 has a plurality ofly, and is a plurality of the gas-supply pipe 13 equipartition is around the axis of tubbiness body, and a plurality of gas-supply pipes 13 can evenly be to the interior transportation positive pressure gas of positive pressure flow district for positive pressure gas can evenly be full of the positive pressure flow district fast at the initial stage of operation so that form the air curtain, and protection insulating assembly 104 keeps away from the dust particle.

Preferably, the sealing plate 8 and the flow guide plate 7 are arranged in parallel, so that positive pressure gas conveyed from the gas conveying pipe 13 can quickly form a protective gas curtain only by downward flowing without backflow.

Preferably, the insulating assembly 104 further includes a connecting rod 14, the connecting rod 14 is a metal sleeve, the connecting rod 14 is sleeved in the insulator 10, one end of the connecting rod 14 is connected to the metal cylinder 5, and the other end of the connecting rod 14 is connected to the star cathode 3. And the connecting rod 14 runs through the guide plate 7 and the sealing plate 8, and when the connecting rod 14 runs through the guide plate 7 and the sealing plate 8, the contact place of the connecting rod 14 with the guide plate 7 and the sealing plate is ensured to be sealed so as to be isolated from the outside.

Preferably, the dust collector further comprises an observation port 2 for observing the insulating assembly 104, wherein the observation port 2 is arranged on the metal cylinder 5 for observing whether the insulating assembly 104 is adsorbed by dust particles.

Preferably, the star cathode 3 further comprises a cathode plate connection tube 16 connecting the star-shaped metal plates 31; the star-shaped metal plate 31 and the metal cylinder 5 can accelerate the ionization speed of gas, accelerate the moving efficiency of dust particles to the metal cylinder 5 and improve the dust suppression effect. Meanwhile, a plurality of corresponding insulation assemblies 104 can be arranged for a plurality of star-shaped metal plates 31, so that each star-shaped metal plate 31 and the metal cylinder 5 are in an insulation state.

The star-shaped metal plate 31 is parallel to the cross section of the metal cylinder 5, so that the star-shaped metal plate 31 has a small external dimension while the star-shaped metal plate 31 is ensured to have a short distance with the metal cylinder 5.

In a word, a positive-pressure clean air small environment is constructed by the insulating component 104, so that flying dust with high humidity is difficult to adhere to the insulating component 104 and the periphery, the existence of a path for connecting the positive electrode and the negative electrode to cause discharge due to static charge creepage is fundamentally eliminated, and the metal cylinder and the negative electrode are ensured to be insulated and reliable even in a high-humidity environment, and the effect is good. And the dust suppression device for the belt conveyor can not only have good dust suppression effect, but also run stably and reliably and have longer service life in a high-humidity environment.

In the foregoing detailed description, various features are grouped together in a single embodiment for the purpose of streamlining the disclosure. This method of disclosure is not to be interpreted as reflecting an intention that the claimed embodiments of the subject matter require more features than are expressly recited in each claim. Rather, as the following claims reflect, invention lies in less than all features of a single disclosed embodiment. Thus, the following claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the utility model.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. To those skilled in the art; various modifications to these embodiments will be readily apparent, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

What has been described above includes examples of one or more embodiments. It is, of course, not possible to describe every conceivable combination of components or methodologies for purposes of describing the aforementioned embodiments, but one of ordinary skill in the art may recognize that many further combinations and permutations of various embodiments are possible. Accordingly, the embodiments described herein are intended to embrace all such alterations, modifications and variations that fall within the scope of the appended claims. Furthermore, to the extent that the term "includes" is used in either the detailed description or the claims, such term is intended to be inclusive in a manner similar to the term "comprising" as "comprising" is interpreted when employed as a transitional word in a claim. Furthermore, any use of the term "or" in the specification of the claims is intended to mean a "non-exclusive or".

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (10)

1. A star electrode for electrostatic dust removal of a belt conveyor apparatus comprising a conveyor belt (6) conveying articles with dust, the dust of the articles with dust being suppressed by an electrostatic dust suppression device; the electrostatic dust suppression device is characterized by comprising a star-shaped cathode (3), an insulation component (104) and a metal cylinder (5) serving as an anode, wherein the metal cylinder (5) is covered above the conveyer belt (6); the star-shaped cathode (3) is arranged in the metal cylinder (5), and the star-shaped cathode (3) is connected to the metal cylinder (5) through the insulating assembly (104);

the star-shaped cathode (3) is a star-shaped metal plate (31), and the star-shaped metal plate (31) is parallel to the cross section of the metal cylinder (5);

the star-shaped metal plate (31) has a plurality of sharp corners, each of which is provided with a copper-clad tip (32).

2. The star electrode for electrostatic precipitator of belt conveyors according to claim 1, characterized in that each sharp corner of the star-shaped metal plate (31) is a sharp corner with two sides having a solid point of intersection; the copper-clad tip (32) comprises the solid intersection points, and a pattern formed by a connecting line of the solid intersection points of each sharp angle is a perfect circle or an ellipse.

3. Star electrode for electrostatic precipitator of belt conveyors according to claim 1, characterized in that the number of points of the star-shaped metal plate (31) is 8-11.

4. Star electrode for electrostatic precipitator of belt conveyors according to claim 3, characterized in that the number of points of the star-shaped metal plate (31) is 8, 9, 10 or 11.

5. The star electrode for electrostatic precipitator of belt conveyors according to claim 1, characterized in that the star-shaped metal plate (31) is provided with an anti-corrosion coating on the surface except for the copper-coated tip (32) and/or the inner side of the metal cylinder (5) is coated with a non-conductive film.

6. The star electrode for electrostatic precipitator of a belt conveyor apparatus as claimed in claim 1, further comprising: a vibrator (4) arranged on the metal cylinder body (5) and used for vibrating the metal cylinder body (5).

7. The star electrode for electrostatic precipitator of belt conveyors according to claim 1, characterized in that the material of the star-shaped metal plate (31) is weathering steel.

8. The star electrode for electrostatic precipitator of belt conveyors according to claim 1, characterized in that the metal cylinder (5) is formed by connecting a plurality of metal cylinder segments in sequence, the axes of the plurality of metal cylinder segments coinciding;

the device comprises two star-shaped cathodes (3) connected in series, wherein the two star-shaped cathodes (3) connected in series are connected to one section of metal cylinder section through the same insulating assembly (104), and the two star-shaped cathodes (3) connected in series are connected to the metal cylinder section except for two ends through the same insulating assembly (104);

wherein the distance between the two star-type cathodes (3) is 300-600 mm.

9. The star electrode for electrostatic precipitator of belt conveyors according to claim 8, characterized in that the electrostatic dust suppression means comprises a plurality of insulating assemblies (104) arranged at equal intervals.

10. An electrostatic precipitator system for a belt conveyor having a star electrode, comprising the star electrode for electrostatic precipitator of a belt conveyor of any of claims 1-9;

the star-shaped electrode for electrostatic dust collection of the belt type conveying equipment comprises an electrostatic dust suppression device; the electrostatic dust suppression device comprises a metal cylinder (5), a conveying belt (6) and a star-shaped cathode (3), wherein the metal cylinder (5) is covered above the conveying belt (6); the star-shaped cathode (3) is arranged in the metal cylinder (5);

the electrostatic dust suppression device further comprises: the star-shaped cathode (3) is connected to the metal cylinder (5) through the insulating assembly (104).

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