Carbon powder airflow dryer

Abstract

The invention discloses a carbon powder pneumatic dryer, which relates to the technical field of carbon powder drying and comprises a closed drying system, a dehumidifier for removing moisture in air entering the drying system is arranged at the initial position of the drying system, the outlet end of the dehumidifier is connected with a heater, and a high-temperature high-efficiency filter is arranged at the tail end of the heater. The high-temperature efficient filter is connected with a feeder through a hot air pipeline, the feeder is connected with a cyclone dust collector through a feeding pipe, a filter element dust collector is arranged on the rear portion of the cyclone dust collector, the filter element dust collector and the cyclone dust collector are connected through a conveying pipe, the filter element dust collector is provided with an exhaust fan through an air pipe, and the exhaust fan is located at the tail end of the drying system. By arranging the closed drying system, interference of the external environment on the internal airflow state of the system is effectively avoided, the operation stability is improved, the drying system is sequentially provided with the cyclone dust collector and the filter element dust collector, a two-stage dust removal mechanism is formed, and it is ensured that discharged gas reaches the environmental protection standard.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of carbon powder drying, and particularly relates to a carbon powder airflow dryer. BACKGROUND

[0002] As the core consumables of electrostatic imaging equipment such as laser printers and copiers, carbon powder is mainly composed of components such as resin, pigment, charge control agent and magnetic material through microfabrication.

[0003] At present, the drying of carbon powder is mostly carried out by an open or semi-closed airflow drying method, the basic principle of which is to contact high-temperature gas with wet materials and use hot air to remove water, so as to achieve the purpose of drying. However, the traditional method has the following significant defects in actual application: in the open system, the air humidity is difficult to control, especially in humid climate conditions, a large amount of water vapor in the air will be directly absorbed by the carbon powder, resulting in an increase in the water content of the product, and further affecting the flowability, charging performance of the carbon powder and the clarity of the final printed image; due to the lack of effective dehumidification pretreatment device, the traditional drying system needs higher heating temperature and longer drying time to remove the water in the materials, which not only increases the energy consumption, but also may cause the carbon powder to be caked or deteriorated due to overheating; during the drying and conveying process, the carbon powder is prone to form dust flying phenomenon, the dust removal capacity of the traditional system is limited, and a single cyclone dust collector is often equipped, which cannot effectively separate small particles, resulting in off-gas emission not meeting the standards, threatening the environment and the health of the operating personnel; most of the drying systems do not realize the full-closed circulation design, which is easy to cause dust leakage, air backflow and other problems, affecting the cleanliness of the workshop, and may cause cross contamination and reduce the consistency of product quality.

[0004] Therefore, we provide a carbon powder airflow dryer to solve the above problems. SUMMARY

[0005] The present application aims to provide a carbon powder airflow dryer, which solves the problem of poor drying effect of the existing open or semi-closed airflow drying method by setting a closed drying system.

[0006] To solve the above technical problems, the present application is realized by the following technical scheme:

[0007] The present application is a kind of carbon powder airflow dryer, including closed drying system, the starting position of the drying system is provided with dehumidifier for removing the moisture in the air entering the drying system, the outlet end of the dehumidifier is connected with a heater, the heater is connected with a feeder through a hot air duct, the feeder is connected with a cyclone dust collector through a feeding pipe, the cyclone dust collector is arranged with a filter core dust collector at the rear, and both are connected through a conveying pipe, and the filter core dust collector is equipped with an exhaust fan through an air pipe, and the exhaust fan is located at the end of the drying system;The internal cavity of the feeder is communicated with the hot air duct and the feeding pipe, and the end of the feeder is provided with a tapered feeding port, and the bottom tapered opening of the tapered feeding port is communicated with the internal passage of the feeder.

[0008] The present application is further provided that the feeder is provided with an annular circulation channel, and the outer wall of the pipe of the feeder is provided with a cold water jacket.

[0009] The present application is further provided that the connecting end of the feeding pipe and the cyclone dust collector is provided with an air supplement port, and the two ends of the feeding pipe are equipped with arc elbows.

[0010] The present application is further provided that the hot air duct and the conveying path of the air pipe are both provided with a temperature and humidity transmitter, and the temperature and humidity transmitter is provided with an instrument panel for temperature and humidity display.

[0011] The present application is further provided that the heater comprises a shell, a heating chamber and a filtering chamber separated by a partition plate, the inner wall of the heating chamber is provided with a heating rod, and the middle of the filtering chamber is provided with a filter core, and the filter core is provided with a flow guide vane around it.

[0012] The present application is further provided that the two ends of the shell are tapered, the partition plate is fixed to the inner wall of the shell, and the partition plate is provided with an opening for gas flow at the middle position, and the edge of the partition plate near the gas outlet end of the shell is provided with a through groove at equal intervals, and the through groove and the filtering chamber form a gas flow channel.

[0013] The present application is further provided that the flow guide vane is spaced apart from the inner wall of the shell, and the end of the flow guide vane is fixed to the edge of the partition plate in the filtering chamber.

[0014] The present application is further provided that the cyclone dust collector comprises a conical shell, an air inlet connected with the inside of the conical shell through an air inlet channel, an air outlet arranged at the top of the conical shell, a hollow plate rotatably arranged in the inside of the conical shell, a wind wheel fixed to the upper side of the hollow plate, a cleaning rod fixed to the lower side of the hollow plate at equal intervals, and a positioning ring fixed to the bottom of the cleaning rod.

[0015] The application is further provided with an air inlet connected with the feeding pipe, an air outlet connected with the conveying pipe, an air inlet channel connected with the air inlet arranged along the circumferential side of the top of the conical shell, and the end of the air inlet channel opposite to the air wheel.

[0016] The application is further provided with an inclined cleaning rod in contact with the inner wall of the cyclone dust collector

[0017] The application has the following beneficial effects:

[0018] 1. The closed drying system effectively avoids the interference of the external environment on the airflow state in the system, improves the stability of operation, and forms a two-stage dust removal mechanism by sequentially arranging a cyclone dust collector and a filter core dust collector.

[0019] 2. The filter chamber, filter core and guide vane structure arranged in the heater ensure that the heated gas is subjected to efficient filtration treatment before entering the drying system, removes impurity particles, ensures that the hot air sent into the drying process is clean, thereby avoiding the pollution of carbon powder products and improving the purity and quality of the final product.

[0020] 3. The hollow plate driven by the air wheel is arranged in the cyclone dust collector, and the inclined cleaning rod is fixed to the lower side of the hollow plate, which can effectively prevent the carbon powder particles from adhering to the inner wall due to the centrifugal force to form accumulated material, avoid blockage or affect the airflow distribution, and further improve the dust separation efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used for the embodiment description.

[0022] Fig. 1 It is a drying system arrangement diagram of a carbon powder airflow dryer.

[0023] Fig. 2 It is a cross-sectional view of the internal structure of a heater of a carbon powder airflow dryer.

[0024] Fig. 3 It is a structure diagram of a heating chamber and a filter chamber of a carbon powder airflow dryer.

[0025] Fig. 4 It is a schematic diagram of the internal structure of a cyclone dust collector of a carbon powder airflow dryer.

[0026] Fig. 5It is a kind of carbon powder air flow dryer wind wheel position diagram.

[0027] Fig. 6 It is a kind of carbon powder air flow dryer cleaning rod and hollow plate installation diagram.

[0028] In the drawings, the components represented by each reference numeral are listed as follows:

[0029] 1, dehumidifier; 2, heater; 21, shell; 22, partition; 23, heating chamber; 24, filter chamber; 25, heating rod; 26, guide vane; 3, temperature and humidity transmitter; 4, hot air duct; 5, feeder; 51, conical feeding port; 52, cold water jacket; 6, feeding pipe; 61, air supplement port; 7, cyclone dust collector; 71, conical shell; 72, air outlet; 73, air inlet; 74, cleaning rod; 75, positioning ring; 76, hollow plate; 77, wind wheel; 78, air inlet channel; 8, filter core dust collector; 9, exhaust fan. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0031] Embodiment one

[0032] Please refer to Figs. 1-3 The present application is a kind of carbon powder air flow dryer, including closed drying system, the starting position of the drying system is provided with dehumidifier 1 for removing the moisture in the air entering the drying system, the outlet end of the dehumidifier 1 is connected with heater 2, the heater 2 is connected with feeder 5 through hot air duct 4, the feeder 5 is connected with cyclone dust collector 7 through feeding pipe 6, the rear part of the cyclone dust collector 7 is arranged with filter core dust collector 8, and both are connected through conveying pipe, and the filter core dust collector 8 is equipped with exhaust fan 9 through air pipe, and the exhaust fan 9 is located at the end of the drying system; The internal cavity of the feeder 5 is communicated with the hot air duct 4 and the feeding pipe 6, and the end of the feeder 5 is provided with conical feeding port 51, and the bottom conical opening of the conical feeding port 51 is communicated with the internal passage of the feeder 5;

[0033] The carbon powder airflow dryer provided by the embodiment aims to realize efficient and stable drying process, while ensuring the sealing and safety of the system. The drying system is a closed circulation system, and a dehumidifier 1 is arranged at the starting end for removing the moisture contained in the air entering the system, thereby improving the drying efficiency and avoiding the influence of moisture on the subsequent process. The air after dehumidification enters a heater 2, the purified high-temperature gas is delivered to a feeder 5 through a hot air pipeline 4, the carbon powder material to be dried is continuously introduced into the drying system through a conical feeding port 51, in the feeder 5, the high-temperature hot air is fully mixed with the carbon powder material, and then is sent into a cyclone dust collector 7 through a feeding pipe 6, the centrifugal force is used to realize preliminary dust separation, the separated large particle material is discharged through the bottom, and the airflow continues to enter a filter core dust collector 8 for fine filtration, further removing fine particles, and ensuring that the discharged gas meets the environmental protection standard. The filter core dust collector 8 is connected with an exhaust fan 9, and the exhaust fan 9 is located at the end of the entire drying system and is responsible for providing system power and maintaining airflow circulation.

[0034] Specifically, the heater 2 comprises an outer shell 21, a heating chamber 23 and a filtering chamber 24 which are formed by a partition plate 22, the inner wall of the heating chamber 23 is provided with a heating rod 25, the middle of the filtering chamber 24 is provided with a filter core, the periphery of the filter core is provided with a guide vane 26, the two ends of the outer shell 21 are conical, the partition plate 22 is fixed to the inner wall of the outer shell 21, and an opening for gas flow is arranged at the middle position of the partition plate 22, the edge of the partition plate 22 close to the gas outlet end of the outer shell 21 is provided with equidistant through grooves, the through grooves and the filtering chamber 24 form a gas flow channel, the guide vane 26 is spaced apart from the inner wall of the outer shell 21, and the end of the guide vane 26 is fixed to the edge of the partition plate 22 in the filtering chamber 24. The air entering the system is heated to the required temperature by the heating rod 25 arranged around the heating chamber 23 after dehumidification, and then enters the filtering chamber 24 through the opening in the middle of the partition plate 22, and is filtered by the filter core and discharged, thereby ensuring that the hot air entering the subsequent link is clean and free of impurities. At this time, the guide vane 26 can guide the uniform distribution of the airflow, and the airflow is uniformly discharged from the through grooves.

[0035] Further, the feeder 5 is provided with an annular circulation channel, and the outer wall of the pipeline of the feeder 5 is provided with a cold water jacket 52 to maintain the stability of the system temperature; the connection end of the feeding pipe 6 and the cyclone dust collector 7 is provided with an air supplement port 61, which can supplement fresh air according to the actual operation condition to adjust the system temperature; the two ends of the feeding pipe 6 are provided with arc elbows, the hot air pipeline 4 and the conveying path of the air pipe are both provided with a temperature and humidity transmitter 3, the outside of the temperature and humidity transmitter 3 is provided with an instrument panel for temperature and humidity display, which can monitor the temperature and humidity changes of the gas in the system in real time and display the data through the external instrument panel, thereby facilitating the operation personnel to adjust and control.

[0036] The operation process of the embodiment is as follows: first, start the system and preheat: air enters from the starting end of the drying system, and the moisture in the air is removed by the dehumidifier 1 to improve the subsequent heating efficiency and avoid the influence of moisture on the carbon powder material; then, the dried air enters the heater 2, and is heated to the set temperature in the heating chamber 23 by the heating rod 25 arranged around; after heating is completed, the high-temperature gas enters the filter chamber 24 through the opening in the middle of the partition 22, and is filtered by the filter element to further purify the impurities in the gas, ensuring the cleanliness of the output hot air; in this process, the guide vane 26 guides the airflow to be evenly distributed, and is stably discharged through the through slot, thereby ensuring the uniformity and stability of the airflow;

[0037] The purified high-temperature gas is delivered to the feeder 5 through the hot air pipeline 4, and at the same time, the carbon powder material to be dried is continuously introduced into the internal passage of the feeder 5 through the conical charging port 51; in the feeder 5, the carbon powder is fully mixed with the high-temperature hot air to start the preliminary drying process; in order to maintain the stability of the system temperature, the outer wall of the feeder 5 is provided with a cold water jacket 52 to prevent overheating from affecting the performance of the material; the mixed hot air and carbon powder are delivered to the cyclone dust collector 7 through the feeding pipe 6, and preliminary dust separation is realized under the action of centrifugal force, and the large particle carbon powder is collected and discharged from the bottom;

[0038] The airflow continues to enter the filter element dust collector 8 for fine filtration to remove fine particulate matter and ensure that the discharged gas meets environmental protection standards; a fresh air inlet 61 is provided at the connection end of the feeding pipe 6 and the cyclone dust collector 7, which can supplement fresh air according to the actual operation to adjust the system temperature.

[0039] Embodiment two

[0040] Please refer to Figs. 4-6 , the cyclone dust collector 7 includes a conical shell 71, an air inlet 73 connected to the inside of the conical shell 71 through an air inlet passage 78, an air outlet 72 arranged at the top of the conical shell 71, a hollow plate 76 rotatably arranged in the inside of the conical shell 71, a wind wheel 77 fixed to the upper side of the hollow plate 76, cleaning rods 74 fixed equidistantly to the lower side of the edge of the hollow plate 76, and a positioning ring 75 fixed to the bottom of the cleaning rods 74, the cleaning rods 74 are arranged obliquely, and the cleaning rods 74 are in contact with the inner wall of the cyclone dust collector 7;

[0041] The cleaning rods 74 built in the cyclone dust collector 7 are used for cleaning the inner wall thereof; the cleaning rods 74 rotate synchronously with the hollow plate 76, and the wind wheel 77 rotates under the action of the airflow output by the air inlet passage 78, thereby providing rotation power for the hollow plate 76, reducing the carbon powder adsorbed on the inner wall of the cyclone dust collector 7, and ensuring the unhindered rotation of the hollow plate 76; the edge of the hollow plate 76 is assembled with the inner wall of the conical shell 71 through balls, thereby ensuring that the input of high-speed airflow can drive the rotation of the cleaning rods 74 through the rotation of the whole of the wind wheel 77 and the hollow plate 76, and realizing the cleaning of the inner wall of the cyclone dust collector 7.

[0042] Further, the air inlet 73 is connected with the feeding pipe 6, the air outlet 72 is connected with the conveying pipe, the air inlet channel 78 connected with the air inlet 73 is arranged along the circumferential side of the top of the conical shell 71, and the end of the air inlet channel 78 is opposite to the air wheel 77.

[0043] The operation process of the embodiment is as follows: during the operation of the carbon powder airflow drying system, the high-temperature hot air carrying the carbon powder material is conveyed from the feeding pipe 6 to the air inlet 73 of the cyclone dust collector 7 and enters the inside of the conical shell 71 through the air inlet channel 78; the air inlet channel 78 is arranged along the circumferential side of the top of the conical shell 71, and the end of the air inlet channel 78 is opposite to the air wheel 77 fixed on the upper side of the hollow plate 76; the high-speed airflow impacts the air wheel 77 to make it rotate, thereby driving the hollow plate 76 to rotate synchronously; with the rotation of the hollow plate 76, the cleaning rod 74 fixed on the lower side of the hollow plate 76 also rotates; the cleaning rod 74 is arranged obliquely and provided with the positioning ring 75 at the bottom, so that the cleaning rod 74 is always in contact with the inner wall of the cyclone dust collector 7 during the rotation, thereby realizing the continuous cleaning of the inner wall and preventing the carbon powder from accumulating on the inner wall to affect the operation efficiency and separation effect of the equipment; under the action of the centrifugal force, the large-particle carbon powder is thrown to the inner wall of the cyclone dust collector 7 and slides along the inner wall of the conical shell 71 to the bottom to be discharged, while the lighter airflow continues to flow upward and finally enters the filter core dust collector 8 through the air outlet 72 at the top to be further finely filtered. During the whole process, the automatic cleaning structure of the cleaning rod 74 effectively reduces the frequency of manual maintenance, improves the working efficiency and stability of the cyclone dust collector 7, and ensures the continuous and efficient operation of the whole drying system.

[0044] In the description of the present specification, the description referring to the terms "one embodiment", "an example", "a specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0045] The preferred embodiments of the application disclosed above are only used to help explain the application. The preferred embodiments do not describe all the details and limit the application to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of the present specification. The present specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the application, so that those skilled in the art can well understand and utilize the application. The application is limited only by the claims and their full scope and equivalents.

Claims

1. A carbon powder pneumatic dryer comprising a closed drying system; characterized in that: The starting position of the drying system is provided with a dehumidifier (1) for removing moisture in the air entering the drying system, the outlet end of the dehumidifier (1) is connected with a heater (2), the heater (2) is connected with a feeder (5) through a hot air duct (4), the feeder (5) is connected with a cyclone dust collector (7) through a feeding pipe (6), a filter core dust collector (8) is arranged at the rear of the cyclone dust collector (7), and the two are connected through a conveying pipe, and the filter core dust collector (8) is provided with an exhaust fan (9) through an air pipe, and the exhaust fan (9) is located at the end of the drying system. The internal cavity of the feeder (5) is communicated with the hot air duct (4) and the feeding pipe (6), and the end of the feeder (5) is provided with a conical feeding port (51), and the bottom conical opening of the conical feeding port (51) is communicated with the internal passage of the feeder (5).

2. A carbon powder pneumatic dryer according to claim 1, wherein The feeder (5) is provided with an annular circulating channel, and the outer wall of the pipeline of the feeder (5) is provided with a cold water jacket (52).

3. A carbon powder pneumatic dryer according to claim 1, wherein The connecting end of the feeding pipe (6) and the cyclone dust collector (7) is provided with a supplementary air port (61), and the two ends of the feeding pipe (6) are provided with arc elbows.

4. A carbon powder pneumatic dryer according to claim 1, wherein The hot air duct (4) and the conveying path of the air pipe are both provided with a temperature and humidity transmitter (3), and the outside of the temperature and humidity transmitter (3) is provided with an instrument panel for displaying temperature and humidity.

5. A carbon powder pneumatic dryer according to claim 1, wherein The heater (2) comprises a shell (21), a heating chamber (23) and a filtering chamber (24) separated by a partition (22), a heating rod (25) is arranged around the inner wall of the heating chamber (23), and a filter core is arranged in the middle of the filtering chamber (24), and flow guide vanes (26) are arranged around the filter core.

6. A carbon powder pneumatic dryer according to claim 5, wherein The two ends of the shell (21) are conical, the partition (22) is fixed to the inner wall of the shell (21), an opening for gas flow is formed in the middle of the partition (22), and equidistant through grooves are formed in the edge of the partition (22) close to the gas outlet end of the shell (21), and the through grooves and the filtering chamber (24) form a gas flow channel.

7. A carbon powder pneumatic dryer according to claim 5, wherein The flow guide vanes (26) are arranged at intervals between the inner wall of the shell (21), and the ends of the flow guide vanes (26) are fixed to the edge of the partition (22) in the filtering chamber (24).

8. A carbon powder pneumatic dryer according to claim 1, wherein The cyclone dust collector (7) comprises a conical shell (71), an air inlet (73) communicated with the inside of the conical shell (71) through an air inlet channel (78), an air outlet (72) arranged at the top of the conical shell (71), a hollow plate (76) rotatably arranged in the inside of the conical shell (71), a wind wheel (77) fixed to the upper side of the hollow plate (76), cleaning rods (74) equidistantly fixed to the lower side edge of the hollow plate (76), and a positioning ring (75) fixed to the bottom of the cleaning rods (74).

9. A carbon powder pneumatic dryer according to claim 8, wherein The air inlet (73) is connected with the feeding pipe (6), the air outlet (72) is connected with the conveying pipe, the air inlet channel (78) communicated with the air inlet (73) is arranged along the circumferential side of the top of the conical shell (71), and the end of the air inlet channel (78) is opposite to the wind wheel (77).

10. A carbon powder pneumatic dryer according to claim 8, wherein The cleaning rod (74) is arranged obliquely, and the cleaning rod (74) is in contact with the inner wall of the cyclone dust collector (7).

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