CN203534103U - Pneumatic drying device - Google Patents

Abstract

The utility model discloses a pneumatic drying device which is provided with a heater, a drying pipe, a cyclone separator and a first bag-type dust collector. The heater, the drying pipe, the cyclone separator and the first bag-type dust collector are arranged from front to back. A feeding opening is formed in the drying pipe, and a discharging opening of a feeder is connected with the feeding opening of the drying pipe. The middle of a feeding segment, provided with the feeding opening, of the drying pipe is a thin-radius portion, and the front portion and the rear portion of the feeding segment are in horn shapes. A net board inclining towards the lower rear side is arranged in the position, facing the feeding opening, in the feeding segment. The pneumatic drying device is provided with a water film dust collector. The heater is connected with an air inlet of the drying pipe, and an air outlet of the drying pipe is connected with an air inlet of the cyclone separator. An air outlet of the cyclone separator is connected with an air inlet of the first bag-type dust collector through a first pipeline, and an air outlet of the first bag-type dust collector is connected with an air inlet of the water film dust collector through a second pipeline. A first induced draft fan is arranged on the second pipeline, and tail gas is exhausted through the water film dust collector. The pneumatic drying device can convey materials smoothly and achieve zero emission.

Description

Air drying equipment

technical field

The utility model relates to airflow drying equipment.

Background technique

Airflow drying is a method of dispersing and suspending granular solid materials in high-speed hot airflow and drying them under pneumatic conveying. The heated air flows quickly in the drying pipe. After the wet material enters the drying pipe, it is washed away by the high-speed airflow, and the two are fully mixed, and are carried by the high-speed airflow to the outlet of the drying pipe. Usually, a cyclone separator is used at the outlet of the pipe for gas-solidification. The two phases are separated. Airflow drying is suitable for processing fine-grained materials that are heat-sensitive, easily oxidized, and flammable. The utility model with the Chinese patent application number CN201020290152.7 discloses a powder airflow drying device, including an air-drying tower, a cyclone separator and a bag filter, and a screw feeder is provided at the feeding port at the bottom of the air-drying tower , the cyclone separator and the bag-type dust collector are respectively installed at the discharge port on the top of the air-drying tower, the cyclone separator is connected to the air-drying tower through the coarse material conveying pipeline, and the bag-type dust collector is connected to the air-drying tower through the fine material conveying pipeline , the top of the cyclone separator is also connected to the bag filter through a pipeline, and the outlets of the cyclone separator and the bag filter are respectively connected to the collector through a pipeline, and the collector is externally connected to a boiling dryer for further drying of the powder . The current airflow drying equipment is prone to blockage in the feeding section of the drying pipe, which affects the transportation of materials; the collection of materials is scattered, and the finished product is easy to be polluted; when drying heat-sensitive materials, the tail gas contains solvents, and the tail gas is directly discharged into the atmosphere without treatment, which is harmful to the environment. Pollution is produced, which is not conducive to environmental protection.

Utility model content

The purpose of the utility model is to propose an airflow drying device that can transport materials smoothly and realize zero discharge.

In order to achieve the above object, the utility model adopts the following technical scheme: the utility model has a heater, a drying pipe, a cyclone separator and a first bag filter arranged from front to back, the drying pipe is provided with a feed port, and the feeder The discharge port is connected to the feed port of the drying pipe. The middle part of the feed section of the dry pipe is set as a small diameter part, and the front and rear parts are trumpet-shaped. There is a screen plate inclined backward and downward; this equipment has a water film dust collector; the heater is connected to the air inlet of the drying pipe, the air outlet of the drying pipe is connected to the air inlet of the cyclone separator, and the air outlet of the cyclone separator passes through The first pipeline is connected to the air inlet of the first bag filter, the air outlet of the first bag filter is connected to the air inlet of the water film dust collector through the second pipeline, and the first induced draft fan is arranged on the second pipeline. The water film dust collector discharges the exhaust gas.

The upper end of the screen plate is hinged on the tube wall of the drying tube feeding section through a pin shaft, and a spring is arranged behind the screen plate in the drying tube feeding section, and the upper end of the spring is connected on the tube wall of the small diameter section, and The lower end is connected to the lower end of the net plate.

The cyclone separator is formed by connecting a first cyclone separator and a second cyclone separator in parallel.

The discharge port of the first cyclone separator, the discharge port of the second cyclone separator, and the discharge port of the first bag filter are all connected to a material delivery main pipe, and the second bag filter is connected to the material delivery main pipe , the air outlet of the second-type bag filter is connected to the second pipe through the third pipe, and the third pipe is connected to the second induced draft fan.

The main conveying pipe is provided with a surface cooling dehumidifier.

The utility model has the following positive effects: 1. The utility model has a thin diameter in the feeding section of the drying pipe, and when the air flow passes through the feeding section, the flow rate can be increased, and an inclined screen plate is arranged facing the feeding port , so it can prevent the material from clogging at the feed port. 2. The air discharged from the cyclone separator of the utility model is discharged into the atmosphere after being treated by the first bag filter and the water film filter, which can realize zero discharge. 3. The finished product of the utility model is output through the main conveying pipe, which is equipped with a surface cooling dehumidifier. When the finished product passes through the main conveying pipe, the temperature of the finished product is lowered, and the finished product output from the outlet of the second bag filter can Direct bagging is beneficial to improve production efficiency. 4. The existing airflow dryer adopts dispersed discharge and then concentrated bagging, which is easy to cause product pollution. The utility model concentrates discharge and directly packs the material, which can prevent product pollution.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Figure 2 is a schematic diagram of the feed section of the drying tube.

Figure 3 is a schematic diagram of the installation of the stencil.

Detailed ways

Example 1

1 to 3, this embodiment has a heater 1, a drying pipe 2, a cyclone separator 4, a first bag filter 6 and a water film filter 9 arranged from front to back, and a feeder 3 in addition.

The feeder 3 includes a main feeder 3-1, a screw feeder 3-2 for adding an oxidizing agent and a hopper 3-3.

The drying pipe 2 is provided with a feeding port, the feeding port of the feeder 3 is connected with the feeding port of the drying pipe 2, and the middle part of the feeding section 2-1 of the drying pipe 2 is provided with a small diameter part 2-1-2, the front 2-1-1 gradually shrinks into a trumpet shape, and the rear 2-1-3 gradually expands into a trumpet shape. In the feed section 2-1, facing the feed inlet, there is a screen plate 21 inclined backward and downward. The upper end of the screen plate 21 is hinged on the tube wall of the drying tube feed section 2-1 through a pin shaft 22, and the drying tube enters the The material section 2-1 is provided with a spring 23 at the rear of the net plate 21, the upper end of the spring 23 is connected on the pipe wall of the thin diameter section 2-1, and the lower end of the spring 23 is connected with the lower end of the net plate 21; the net plate 21 can be used as Slight shaking can reduce the impact of the material on the screen plate 21 .

Described cyclone separator 4 is formed by the parallel connection of the first cyclone separator 4-1 and the second cyclone separator 4-2, has a total air inlet and total air outlet, the first cyclone separator 4-1 and the second cyclone separator The separators 4-2 each have a discharge port.

The heater 1 is connected to the air inlet of the drying pipe 2, the air outlet of the drying pipe 2 is connected to the total air inlet of the cyclone separator 4, and the total air outlet of the cyclone separator 4 passes through the first pipeline 5 and the first cloth bag The air inlet of the dust collector 6 is connected, the air outlet of the first bag filter 6 is connected with the air inlet of the water film dust collector 9 through the second pipeline 8, the second pipeline 8 is provided with a first induced draft fan 7, and the water film dust collector The air outlet of 9 is connected with the third pipeline 10, and the tail gas is exhausted by the third pipeline 10.

This equipment has a material delivery main pipe 11, the discharge port of the first cyclone separator 4-1 is connected with the material delivery main pipe 11 through the first material delivery branch pipe 13, and the discharge port of the second cyclone separator 4-2 is connected through the second delivery pipe 13. The material branch pipe 14 is connected to the material delivery main pipe 11, and the discharge port of the first bag filter 6 is connected to the material delivery main pipe 11 through the third material delivery branch pipe 15. An unloader 20 is respectively provided on the discharge port of the first cyclone separator 4-1, the discharge port of the second cyclone separator 4-2 and the discharge port of the first bag filter 6. A second bag filter 16 is connected to the material conveying main pipe 11, and the discharge port of the second bag filter 16 is a concentrated discharge port 16-1. The centralized discharge port 16-1 is provided with a discharge valve. The air outlet of the second bag filter 16 is connected to the second pipeline 8 through the third pipeline 17, and the second induced draft fan 18 is connected to the third pipeline 17. A surface cooling dehumidifier 12 is provided on the material conveying main pipe 11 .

Claims (5)

1. An airflow drying equipment, which has a heater (1), a drying pipe (2), a cyclone separator (4) and a first bag filter (6) arranged from front to back, and the drying pipe (2) is equipped with The feed port, the feed port of the feeder (3) is connected to the feed port of the drying pipe (2), and it is characterized in that: the drying pipe (2) is provided with a feed section (2-1) of the feed port The middle part is a small diameter part (2-1-2), the front and rear parts (2-1-1, 2-1-3) are trumpet-shaped, and the feeding section (2-1) is set facing the feeding port. There is a screen plate (21) inclined backward and downward; this equipment has a water film dust collector (9); the heater (1) is connected to the air inlet of the drying pipe (2), and the air outlet of the drying pipe (2) and The air inlet of the cyclone separator (4) is connected, the air outlet of the cyclone separator (4) is connected with the air inlet of the first bag filter (6) through the first pipe (5), and the first bag filter (6) ) is connected to the air inlet of the water film dust collector (9) through the second pipe (8), and the second pipe (8) is provided with a first induced draft fan (7), which is discharged by the water film dust collector (9) exhaust. 2. The airflow drying equipment according to claim 1, characterized in that: the upper end of the screen plate (21) is hinged on the tube wall of the feeding section (2-1) of the drying tube through a pin shaft (22), and the drying The tube feeding section (2-1) is provided with a spring (23) behind the mesh plate (21), and the upper end of the spring (23) is connected to the tube wall of the thin diameter section (2-1). The lower end is connected to the lower end of the net plate (21). 3. The airflow drying equipment according to claim 1, characterized in that: the cyclone separator (4) is composed of a first cyclone separator (4-1) and a second cyclone separator (4-2) connected in parallel . 4. The airflow drying equipment according to claim 1, characterized in that: the outlet of the first cyclone separator (4-1), the outlet of the second cyclone separator (4-2), the first cloth bag The outlets of the dust collector (6) are all connected to a main material conveying pipe (11), and the main material conveying pipe (11) is connected with a second bag filter (16), and the air outlet of the second type bag filter (16) The third pipeline (17) is connected to the second pipeline (8), and the third pipeline (17) is connected to the second induced draft fan (18). 5. The airflow drying equipment according to claim 4, characterized in that: a surface cooling dehumidifier (12) is provided on the material delivery main pipe (11).

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