CN106091635A - Turn net formula dehydrator - Google Patents

Abstract

This application relates to a material dryer, in particular to a rotary screen dryer; it includes a connected heat source chamber and a drying chamber, and a main circulation fan; The air duct, the drum located in the drying chamber, the power equipment to drive the drum to rotate, the rollers that support the drum and can assist the rotation of the drum; the two ports of the air duct are respectively connected to the top of the heat source chamber and the end of the drying chamber Connected at the top. Due to the implementation of the above-mentioned technical scheme, this application uses the cooperation of the main circulation fan and the air duct, and the hot air in the heat source chamber passes through the drying chamber and the air duct and returns to the heat source chamber to form a circulation; under the rotation of the drum, the materials are loosely suspended and dried while being heated While moving forward, because the mesh is smaller than the material, the material will not leak out of the mesh, and will fully and evenly contact with the hot air penetrating from the inside and outside, and the moisture can be discharged from the dehumidification window; the material dries quickly and evenly, and the energy cycle Utilization, the heat utilization rate can reach more than 90%.

Description

Rotary screen dryer

technical field

The application relates to a material dryer, in particular to a rotary screen dryer.

Background technique

The current material dryer consumes a lot of energy during drying, mainly because there are big problems in the structural design of the dryer, for example: tower dryers need to send hot air into the tower through a long pipeline In the drying section of the dryer, the loss is too large during the transportation, and the heat energy utilization rate is less than 60%. In the exhaust gas discharge, a large amount of effective hot air is taken away; the hot air of the rotary drum dryer enters the drum from the inlet end and exits from the other end. When the material is discharged from the material port, 20-25% of the hot air will be discharged in vain in the waste gas discharge. In addition to the loss of the hot air pipeline, only half of the hot air is actually used to dry the material, and the other half of the hot air is exhausted and wasted. ; There is a serious waste of energy. All existing drying machines have the defects of slow drying speed and uneven drying in addition.

Contents of the invention

The purpose of this application is to propose a rotary screen dryer with uniform drying, fast material drying speed and high energy utilization rate.

This application is achieved in the following way: a rotary net dryer, which includes a connected heat source chamber and a drying chamber, and a main circulation fan that can send the hot air in the heat source chamber to the head of the drying chamber; The top and the air duct on the top of the drying chamber, the drum located in the drying chamber, the power equipment that drives the drum to rotate, the idlers that support the drum and can assist the rotation of the drum; the two ports of the air duct are respectively connected to the top of the heat source chamber. It communicates with the top of the tail end of the drying chamber; the drum is inclined with the head end high and the tail end low. There is an outlet; the drying chamber is provided with at least one dehumidification window.

Further, the wall of the rotating drum is a mesh belt, and there is no mesh belt at the rear end of the rotating drum to form a discharge port.

Further, at least one auxiliary fan capable of blowing air upwards is provided under the drum.

Further, a lifting board is provided on the inner wall of the drum.

Further, a fan room is provided between the heat source room and the drying room, and a main circulation fan is provided in the fan room, and the fan room is also provided with a heat source air outlet communicating with the heat source room and a drying air outlet communicating with the drying room; the air inlet It is set corresponding to the drying tuyere, and there is a gap between the air inlet and the drying tuyere.

Further, the top of the tail end of the drying chamber is provided with an auxiliary circulation fan capable of sending the hot air in the drying chamber into the air duct.

Further, the rear end of the drum is provided with an end cover, and the center of the end cover is provided with a transmission shaft connected to the power equipment, and the front end of the drum is seated on the upper ends of at least two supporting rollers; the lower ends of the power equipment and the supporting rollers are fixed organically shelf.

Further, a hot blast stove and a heat exchanger connected together are provided in the heat source chamber, a combustion-supporting fan is installed on the hot blast stove, and an exhaust fan located outside the heat source chamber is installed on the hot blast stove through a pipeline passing through the top of the heat source chamber.

Further, the inner wall of the drying chamber is provided with an insulating layer.

Further, both the heat source room and the fan room are equipped with cold air doors.

Due to the implementation of the above-mentioned technical scheme, this application uses the cooperation of the main circulation fan and the air duct, the hot air in the heat source chamber returns to the heat source chamber through the drying chamber and the air duct to form a circulation; the material enters the inclined drum, and under the rotation of the drum, The material is loosely suspended, and moves forward while being heated and dried. Since the mesh is smaller than the material, the material will not leak out from the mesh, and will fully and evenly contact with the hot air penetrating from the inside and outside, and the moisture can be discharged from the dehumidification window; The material is dried quickly and evenly, the energy is recycled, and the heat utilization rate can reach more than 90%.

Description of drawings: the specific structure of the application is provided by the following drawings and examples:

Fig. 1 is the sectional structure schematic diagram of the present application;

Fig. 2 is a left perspective schematic diagram of Fig. 1;

Fig. 3 is the structural schematic diagram of embodiment 1 and embodiment 2 of the present application;

Fig. 4 is the structural representation of embodiment 3 and embodiment 4 of the present application;

Fig. 5 is a schematic diagram of the relationship between the drum and the rollers.

Legend: 1. Heat source room, 2. Drying room, 3. Main circulation fan, 4. Air duct, 5. Rotary drum, 6. Power equipment, 7. Idler roller, 8. Air inlet, 9. Feed inlet, 10. Material outlet, 11. Humidity discharge window, 12. Mesh belt, 13. Auxiliary fan, 14. Copy board, 15. Fan room, 16. Heat source air outlet, 17. Drying air outlet, 18. Auxiliary circulation fan, 19 .End cover, 20. Transmission shaft, 21. Frame, 22. Hot stove, 23. Heat exchanger, 24. Combustion fan, 25. Exhaust fan, 26. Cold air door, 27. Materials.

detailed description:

The present application is not limited by the following examples, and specific implementation manners can be determined according to the technical solutions of the present application and actual conditions.

As shown in Figures 1 to 5, the rotary screen dryer includes a connected heat source chamber 1 and a drying chamber 2, and a main circulation fan 3 that can send the hot air in the heat source chamber 1 to the head of the drying chamber 2; it also includes The air duct 4 fixed on the top of the heat source chamber 1 and the top of the drying chamber 2, the drum 5 located in the drying chamber 2, the power equipment 6 for driving the drum 5 to rotate, and the device that supports the drum 5 and can assist the rotation of the drum 5 Carrier roller 7; the two ports of the air duct 4 communicate with the top of the heat source chamber 1 and the top of the tail end of the drying chamber 2 respectively; An air inlet 8 for hot air flow and a material inlet 9 for feeding materials 27 , and a material outlet 10 is provided at the end of the drum 5 ; at least one dehumidification window 11 is provided in the drying chamber 2 .

When working, the hot air flow provided by the heat source chamber 1 returns to the heat source chamber 1 through the drying chamber 2 and the air duct 4 under the pressure difference caused by the main circulation fan 3 to form the recycling of the hot air flow; in the drying chamber 2 , the hot air enters the drum 5 through the air inlet 8, and discharges the drum 5 from the discharge port 10. At this time, the material 27 entering the drum 5 through the feed port 9 is loosened by the rotation of the drum 5. Suspended; due to the oblique setting of the drum 5, the material 27 moves to the tail of the drum 5 while being dried under the action of the hot air flow, and finally flows out through the discharge port 10. The material 27 is suspended and advanced in the drum 5, and will be fully and evenly contacted with the hot air flow, and the material will be dried quickly and evenly; the hot air flow can be circulated back to the heat source chamber 1 for recycling, and the heat utilization rate can reach more than 90%, which effectively saves energy, reducing the cost; the moisture discharged from the material can be discharged from the dehumidification window 11.

Embodiment 1, as shown in FIG. 3 , the wall of the drum 5 is a mesh belt 12 , and there is no mesh belt 12 at the rear end of the drum 5 to form a discharge port 10 . The hole of the mesh belt 12 is determined according to the geometric shape of the granular material, generally 1/3 to 2/3 of the average diameter of the particle; in this way, the material 27 will not leak from the mesh, and the friction generated by the rotation of the mesh belt 12 is large. It is easier to scatter the material 27 upwards to be suspended under the action of air flow. When working, due to the influence of pressure difference, the hot air in the drying chamber 2 circulates from the air duct 4 back to the heat source chamber 1; at this time, the hot air below the drum 5 penetrates the mesh belt 12 and enters the inside of the drum 5, and the drum 5 The hot air in 5 penetrates the upper mesh belt 12 and enters the top of the drying chamber 2; in this way, after the material 27 is loosely suspended, it is more fully and evenly contacted with the hot air that penetrates evenly from the inside and outside of the drum 5, and the drying speed is fast and the drying Dries well.

Embodiment 2, as shown in FIG. 3 , the wall of the drum 5 is a mesh belt 12 , and there is no mesh belt 12 at the rear end of the drum 5 to form a discharge port 10 . Below the drum 5 is provided with at least one auxiliary fan 13 capable of blowing upwards. In this way, the hot air flow below the drum 5 has a strong penetrating power into the drum 5, which can blow the loosely suspended material 27 higher and looser, so that the total contact area with the hot air flow is larger, and the drying Fast speed and good drying effect.

Embodiment 3, as shown in FIG. 4 , the inner wall of the drum 5 is provided with a lifting board 14 . When working, the material 27 in the drum 5 will be lifted up by the action of the lifting board 14, blown by the hot air flow when falling, and move to the tail of the drum 5 while drying; discharge.

Embodiment 4, as shown in FIG. 4 , the wall of the drum 5 is a mesh belt 12 , and there is no mesh belt 12 at the rear end of the drum 5 to form a discharge port 10 . The inner wall of the drum 5 is provided with a lifting board 14 . When working, the material 27 in the drum 5 will be lifted up by the action of the lifting plate 14, and will be affected by the hot air flow penetrating from the mesh belt 12 above the drum 5 when falling, so that the material 27 is suspended more loosely, and the drying The drying speed is fast and the drying effect is good; the used hot air in the drum 5 can pass through the mesh belt 12 and circulate back to the heat source chamber 1 through the air duct 4, and the moisture discharged from the material 27 can also be discharged from the mesh belt 12 to the drum 5, and then discharged through the dehumidification window 11.

Below is the common preferred scheme of embodiment 1, embodiment 2, embodiment 3 and embodiment 4:

As shown in Figure 1, a fan room 15 is provided between the heat source room 1 and the drying room 2, and the main circulation fan 3 is arranged in the fan room 15, and the fan room 15 is also provided with a heat source tuyere 16 communicating with the heat source room 1 and connected to the drying room. The drying tuyere 17 communicated with the drying room 2;

The main circulation fan 3 can be installed on the heat source tuyere 16, the tuyere end of the main circulation fan 3 is facing the drying tuyere 17, and the other side of the drying tuyere 17 can be facing the air inlet 8 of the drum 5; The hot air from the heat source chamber 1 is directly sent to the drum 5 . There is a gap between the air inlet 8 and the drying outlet 17, which can ensure that the main circulation fan 3 can directly send most of the hot air provided by the heat source chamber 1 into the drum 5 to fully contact with the material 27; The hot air is directly sent into the drying chamber 2, and when the drum 5 is equipped with a mesh belt 12, the hot air below the drum 5 will penetrate into the inside of the drum 5; although there will be a small part of the hot air not directly Participate in contact with the material 27, but the material 27 can fully contact with the hot air penetrating from the inside and outside of the drum 5 after being loosely suspended, so as to speed up the drying speed and improve the drying effect, and this very small part does not directly participate in the contact with the material 27 The contacted hot air will be circulated back to the heat source chamber 1 for secondary use, and energy will not be wasted.

As shown in FIG. 1 , the top of the tail end of the drying chamber 2 is provided with an auxiliary circulation fan 18 capable of sending the hot air in the drying chamber 2 into the air duct 4 . The auxiliary circulation fan 18 can increase the circulating pressure difference, so that the hot and humid air in the drying chamber 2 enters the heat source chamber 1 through the air duct 4 for secondary heating and recycling.

As shown in Figures 1 and 5, the rear end of the drum 5 is provided with an end cover 19, and the center of the end cover 19 is provided with a transmission shaft 20 connected to the power equipment 6, and the front end of the drum 5 is seated on the upper ends of at least two supporting rollers 7; The lower ends of the power equipment 6 and the idler roller 7 are all fixed with a frame 21. In this way, the tail end of the rotating drum 5 can be driven to rotate by the power equipment 6 and the transmission shaft 20, and the head end of the rotating drum 5 is supported and assisted by a supporting roller 7 on both sides. Corner, stable support and reasonable footprint.

As shown in Figure 1, a hot blast stove 22 and a heat exchanger 23 connected together are provided in the heat source chamber 1, and a combustion-supporting fan 24 is installed on the hot blast stove 22, and the hot blast stove 22 is installed with a pipeline through the top of the heat source chamber 1. The exhaust fan 25 located outside the heat source chamber 1. The hot blast stove 22 can generate heat by burning coal, fuel oil, gas, biomass or by solar energy and electricity conversion, and the heat exchanger 23 can accelerate heat exchange.

The inner wall of the drying chamber 2 is provided with an insulating layer. The thermal insulation layer can be made of thermal insulation rock wool board, which reduces the energy loss of the hot and humid air after use and can be recycled again; there are inspection and cleaning doors on both sides of the drying chamber 2, which is convenient for operators to enter the drying chamber 2 for inspection and cleaning.

As shown in FIG. 1 , both the heat source chamber 1 and the fan chamber 15 are provided with cold air doors 26 .

The above technical features constitute the embodiment of the present application, which has strong adaptability and implementation effect, and non-essential technical features can be increased or decreased according to actual needs to meet the needs of different situations.

Claims (10)

1. A rotary net type dryer, characterized in that: it includes a connected heat source chamber and a drying chamber, and a main circulation fan that can send hot air in the heat source chamber to the head of the drying chamber; it also includes a fan fixed in the heat source chamber The top and the air duct on the top of the drying chamber, the drum located in the drying chamber, the power equipment that drives the drum to rotate, the idlers that support the drum and can assist the rotation of the drum; the two ports of the air duct are respectively connected to the top of the heat source chamber. It communicates with the top of the tail end of the drying chamber; the drum is inclined with the head end high and the tail end low. There is an outlet; the drying chamber is provided with at least one dehumidification window. 2. The rotary screen dryer according to claim 1, characterized in that: the wall of the drum is a mesh belt, and there is no mesh belt at the rear end of the drum to form a discharge port. 3. The rotary screen dryer according to claim 2, characterized in that: at least one auxiliary fan capable of blowing air upwards is provided under the drum. 4. The rotary screen dryer according to claim 1 or 2, characterized in that: the inner wall of the rotary drum is provided with a lifting board. 5. The rotary net dryer according to claim 1, 2 or 3, characterized in that: a fan room is provided between the heat source room and the drying room, a main circulation fan is provided in the fan room, and the fan room is also provided with a The heat source tuyere connected to the heat source chamber and the drying tuyere connected to the drying chamber; the air inlet and the drying tuyere are arranged correspondingly, and there is a gap between the air inlet and the drying tuyere. 6. The rotary screen dryer according to claim 4, characterized in that: a fan room is provided between the heat source room and the drying room, a main circulation fan is provided in the fan room, and a fan room communicated with the heat source room is also provided in the fan room. The heat source tuyere and the drying tuyere connected to the drying chamber; the air inlet and the drying tuyere are arranged correspondingly, and there is a gap between the air inlet and the drying tuyere. 7. The rotary screen dryer according to claim 1 or 2 or 3 or 6, characterized in that: the top of the tail end of the drying chamber is provided with an auxiliary circulation fan capable of sending the hot air in the drying chamber into the air duct. 8. The rotating screen dryer according to claim 1, 2, 3 or 6, characterized in that: the rear end of the drum is provided with an end cover, and the center of the end cover is provided with a drive shaft connected to the power equipment, and the drum The front end is seated on the upper ends of at least two supporting rollers; the power equipment and the lower ends of the supporting rollers are fixed with frames. 9. The rotary screen dryer according to claim 1 or 2 or 3 or 6, characterized in that: a hot blast stove and a heat exchanger connected together are provided in the heat source chamber, a combustion-supporting fan is installed on the hot blast stove, and the hot blast The furnace is equipped with an exhaust fan located outside the heat source through a pipeline passing through the top of the heat source chamber; or/and, the inner wall of the drying chamber is provided with an insulation layer. 10. The rotary screen dryer according to claim 6, characterized in that: both the heat source chamber and the fan chamber are equipped with cold air doors.