CN212157867U

CN212157867U - Circulation drying system

Info

Publication number: CN212157867U
Application number: CN202020223471.XU
Authority: CN
Inventors: 鲁复员; 程功
Original assignee: Yangzhou Maoyuan Environmental Protection Technology Co ltd
Current assignee: Yangzhou Maoyuan Environmental Protection Technology Co ltd
Priority date: 2020-02-27
Filing date: 2020-02-27
Publication date: 2020-12-15
Anticipated expiration: 2030-02-27

Abstract

The utility model belongs to the technical field of drying equipment, especially, relate to a circulation drying system. The device comprises a box body, a processing device, a heat pump system, an air circulation system and a control system, wherein the processing device comprises a cutting device and a conveying mechanism, the conveying mechanism is arranged in the box body, the initial end and the tail end of the conveying mechanism are respectively positioned below an inlet and above an outlet, the cutting device is arranged at the inlet, the heat pump system is used for generating dry hot air and introducing the dry hot air into the box body, and recovering wet cold air in the box body and converting the wet cold air into the dry hot air; the control system is connected with the conveying mechanism and used for controlling the conveying mechanism to operate. The drying device is used for solving the problem of low drying efficiency. The hot dry air is sent into the box body through the heat pump system, the sludge falling on the conveying mechanism after being cut by the cutting device is dehydrated and dried, the control system controls the conveying mechanism to perform circulation control and variable speed operation control of operation stop and re-operation, effective utilization of the hot dry air is achieved, and drying efficiency is improved.

Description

Circulation drying system

Technical Field

The utility model belongs to the technical field of drying equipment, especially, relate to a circulation drying system.

Background

Sludge drying, also known as sludge dewatering, refers to a process of removing most of the water content from sludge by the action of percolation or evaporation. After the sludge is concentrated, the water content of the sludge is further reduced by a physical method, and the dehydration comprises a natural evaporation method and a mechanical dehydration method.

The conventional sludge drying equipment is characterized in that a conveyor belt is arranged in an oven, hot air is blown upwards by a fan to take away the moisture of sludge on the conveyor belt, and the drying and dehydrating effects are achieved.

However, in the process of blowing hot air upwards, the utilization rate of the hot air is not high, which results in low drying efficiency.

SUMMERY OF THE UTILITY MODEL

The technical problem that this application embodiment will solve lies in overcoming prior art not enough, provides a circulation drying system for solve the problem that drying efficiency is not high.

The technical scheme for solving the technical problems in the embodiment of the application is as follows: a circulation drying system comprises

A tank including an inlet and an outlet;

the processing device comprises a cutting device and a conveying mechanism, the conveying mechanism is arranged in the box body, the initial end and the tail end of the conveying mechanism are respectively positioned below the inlet and above the outlet, and the cutting device is arranged at the inlet;

the heat pump system is used for generating dry hot air, introducing the dry hot air into the box body, and recovering wet cold air in the box body to convert the wet cold air into the dry hot air;

the air circulation system comprises a first fan and a return air duct, the first fan is arranged at the bottom of the box body, is communicated with the heat pump system and is used for introducing dry hot air generated by the heat pump system into the box body, and the return air duct is arranged at the upper end of the box body, is communicated with the heat pump system and is used for introducing wet cold air into the heat pump system;

and the control system is connected with the conveying mechanism and used for controlling the conveying mechanism to operate.

According to the technical scheme, the method has the following beneficial effects:

dry hot air is sent into the box body through the heat pump system, sludge falling on the conveying mechanism after being cut by the cutting device is dehydrated and dried, and finally wet cold air is recycled by the heat pump system and is converted into dry hot air to be circularly dried, wherein the control system controls the conveying mechanism to perform circulating control and variable-speed operation control of operation stop and re-operation, so that effective utilization of hot dry air is realized, and drying efficiency is improved.

Further, conveying mechanism includes fender and two conveyor that distribute from top to bottom, the fender slope sets up in the upper strata conveyor is terminal and lower floor between the conveyor initial end, control system connects conveyor. The beneficial effect of this step is: hot dry air is fully utilized through the two conveying devices, layered dehydration is realized simultaneously, and drying efficiency is improved.

Further, the conveying device comprises a mesh belt and a speed regulating device for driving the mesh belt to rotate, and the control system is connected with the speed regulating device. The beneficial effect of this step is: the contact area of hot dry air and sludge is increased by arranging the mesh belt, the drying efficiency is improved, meanwhile, the speed regulating device is controlled by the control system to operate at a variable speed, the drying time is prolonged, the hot dry air is fully utilized, and the drying efficiency is improved.

Further, the wind-equalizing device further comprises a wind-equalizing plate, wherein the wind-equalizing plate is arranged in a hollow manner and is arranged between the two conveying devices. The beneficial effect of this step is: the drying hot air flowing upwards is enabled to be more uniformly contacted with the sludge, the loss of the drying hot air is reduced, and the drying efficiency is improved.

Further, the air equalizing plate adopts a punching plate, and the aperture of the punching plate is set to be 11 mm.

Further, the air circulation system further comprises a second fan, the second fan is arranged between the two conveying devices and communicated with the heat pump system, and an air outlet of the second fan faces the inside of the box body. The beneficial effect of this step is: set up the second fan between two conveyor, improve the ascending mobility of hot dry air, make hot dry more effectual upwards blow, increase simultaneously in the middle of the box and heat pump system's microcirculation, improve drying efficiency.

Further, the first fan adopts a centrifugal fan, and an air outlet of the centrifugal fan faces upwards.

Further, the heat pump system comprises a condenser, a compressor and an evaporator which are sequentially connected in series, the air inlet of the first fan is opposite to the condenser, and the air inlet of the second fan is opposite to the evaporator.

Furthermore, the wind circulation system also comprises a wind shield obliquely arranged at the bottom of the box body, and the wind shield is used for guiding the hot dry air blown by the first fan to the upper part. The beneficial effect of this step is: the wind shield that the slope set up furthest with dry hot-air direction top, prevent that dry hot-air from forming the whirl in the bottom, avoid dry hot-air's loss, improve drying efficiency.

Further, the control system comprises a controller and a time relay connected with the controller, and the time relay is used for opening in a delayed mode and closing in a delayed mode to control the conveying mechanism in a circulating mode through the controller.

One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

1. the hot dry air is sent into the box body through the heat pump system, the sludge falling on the conveying mechanism after being cut by the cutting device is dehydrated and dried, and finally the wet cold air is recycled by the heat pump system and is converted into dry hot air for circular drying, wherein the control system controls the conveying mechanism to perform circular control and variable-speed operation control of operation stop and re-operation, so that the hot dry air is effectively utilized, and the drying efficiency is improved.

2. Through setting up two conveyor make full use of hot dry air, realize the layering dehydration simultaneously, improve drying efficiency.

3. The contact area of hot dry air and sludge is increased by arranging the mesh belt, the drying efficiency is improved, meanwhile, the speed regulating device is controlled by the control system to operate at a variable speed, the drying time is prolonged, the hot dry air is fully utilized, and the drying efficiency is improved.

4. The drying hot air flowing upwards is enabled to be more uniformly contacted with the sludge, the loss of the drying hot air is reduced, and the drying efficiency is improved.

5. Set up the second fan between two conveyor, improve the ascending mobility of hot dry air, make hot dry more effectual upwards blow, increase simultaneously in the middle of the box and heat pump system's microcirculation, improve drying efficiency.

6. The slope sets up the deep bead in bottom half to furthest with dry hot-air direction top, prevents that dry hot-air from forming the whirl in the bottom, avoids dry hot-air's loss, improves drying efficiency.

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

Fig. 1 is a schematic structural diagram according to an embodiment of the present invention;

FIG. 2 is a schematic side view of the structure of FIG. 1;

FIG. 3 is a schematic view of the air flow according to an embodiment of the present invention;

fig. 4 is a schematic view of the internal connection of the heat pump system according to the embodiment of the present invention.

Reference numerals:

1. a box body; 101 an inlet; 102. an outlet; 2. a cutting device; 3. a conveying mechanism; 301. a conveying device; 3011 a mesh belt; 3012. a speed regulating device; 302. a fender; 4. a heat pump system; 401. an evaporator; 402. a compressor; 403. a condenser; 5. a first fan; 6. an air return duct; 7. a second fan; 8. a wind equalizing plate; 9. a wind deflector.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience of description and simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Examples

As shown in figure 1, the utility model provides a circulation drying system, include

A tank 1 including an inlet and an outlet 102; sludge enters through an inlet arranged above the box body 1 and is discharged from an outlet 102 arranged below the box body 1;

the processing device comprises a cutting device 2 and a conveying mechanism 3, the conveying mechanism 3 is arranged in the box body 1, the initial end and the tail end of the conveying mechanism 3 are respectively positioned below the inlet and above the outlet 102, and the cutting device 2 is arranged at the inlet; the sludge enters from the cutting device 2 at the inlet, is cut into strips by the cutting device 2, falls to the initial end of the conveying direction of the conveying mechanism 3, is conveyed to the outlet 102 by the conveying mechanism 3 and is discharged;

the heat pump system 4 is used for generating dry hot air, introducing the dry hot air into the box body 1, and recovering wet cold air in the box body 1 to convert the wet cold air into the dry hot air; the sludge in the box body 1 is dehydrated and dried by sending dry hot air generated by the heat pump system 4 into the box body 1, wet cold air in the box body 1 is recovered and converted into dry hot air, and the dry hot air is sent into the box body 1 to circularly operate;

the air circulating system comprises a first fan 5 and a return air duct 6, the first fan 5 is arranged at the bottom of the box body 1, is communicated with the heat pump system 4 and is used for introducing dry hot air generated by the heat pump system 4 into the box body 1, and the return air duct 6 is arranged at the upper end of the box body 1, is communicated with the heat pump system 4 and is used for introducing wet cold air into the heat pump system 4; dry hot air of the heat pump system 4 is sent into the box body 1 by the first fan 5 and then returns into the heat pump system 4 by the return air duct 6;

and the control system is connected with the conveying mechanism 3 and used for controlling the operation of the conveying mechanism 3.

Send into dry hot-air to box 1 inside via first fan 5 through heat pump system 4, dry hot-air circulates from box 1 bottom upwards, mud falls the initial end on conveying mechanism 3 after cutting into the strip through cutting device 2, conveying mechanism 3 is at the in-process of operation transport, dry hot-air carries out dehydration stoving to the mud on conveying mechanism 3, heat pump system 4 rethread return air duct 6 retrieves wet cold air and turns into dry hot-air with this circulation stoving at last, wherein, control system control conveying mechanism 3 carries out the circulation control and the variable speed operation control that the operation stopped the rerun, improve the utilization ratio to hot dry-air, improve drying efficiency.

Wherein, conveying mechanism 3 includes fender 302 and two conveyor 301 that distribute from top to bottom, two conveyor 301 are crisscross the subsection, the initial end of lower floor conveyor 301 surpasss the end of upper conveyor 301, make the mud on the upper floor conveyor 301 can fall on the lower floor is conveyor 301, moreover, fender 302 slope sets up between the terminal end of upper floor conveyor 301 and lower floor conveyor 301 initial end, a conveyor 301 for transporting the mud on the upper floor conveyor 301 to the lower floor, prevent that mud from falling into other places in box 1, control system connects conveyor 301, through two conveyor 301 make full use of hot dry air, realize the layering dehydration simultaneously, improve drying efficiency.

The conveying device 301 includes a mesh belt and a speed adjusting device 3012 for driving the mesh belt to rotate, specifically, the mesh belt adopts a mesh-structured conveyor belt, and is driven by a speed adjusting device 3012 such as an upper variable frequency speed reducer, and the control system is connected to the speed adjusting device 3012. The contact area of hot dry air and sludge is increased by arranging the net-mounted conveyor belt, the drying efficiency is improved, meanwhile, the speed regulating device 3012 is controlled by the control system to operate at a variable speed, the drying time is prolonged, the hot dry air is fully utilized, and the drying efficiency is improved.

In this embodiment, the air distribution device further comprises an air distribution plate 8, wherein the air distribution plate 8 is arranged in a hollow manner, and the air distribution plate 8 is arranged between the two conveying devices 301. The drying hot air flowing upwards is enabled to be more uniformly contacted with the sludge, the loss of the drying hot air is reduced, the contact time of the drying hot air and the sludge is prolonged, and the drying efficiency is improved.

Further, the air-equalizing plate 8 is a punching plate, and the aperture of the punching plate is set to be 11 mm.

In this embodiment, the air circulation system further includes a second fan 7, the second fan 7 is disposed between the two conveying devices 301 and is communicated with the heat pump system 4, and an air outlet of the second fan 7 faces the inside of the box body 1. Wherein the second fan 7 can adopt fans such as axial fan to realize, in this embodiment, sets up a plurality of rows of axial fan between two conveyor 301, improves the mobility of air, through set up a plurality of second fans 7 between two conveyor 301, improves the ascending mobility of hot dry wind, makes hot dry more effectual upwards blow, increases the middle little circulation with heat pump system 4 of box 1 simultaneously, improves drying efficiency.

In this embodiment, the first fan 5 is a centrifugal fan, and is provided with two centrifugal fans at the bottom of the box body 1, the air outlet of the centrifugal fan faces upward, and the air inlet of the centrifugal fan is communicated with the heat pump system 4.

As shown in fig. 3 and 4, the heat pump system 4 includes a cabinet, and a condenser 403, a compressor 402 and an evaporator 401 that are disposed inside the cabinet and connected in series in sequence, wherein an air inlet of the first fan 5 is disposed opposite to the condenser 403, and an air inlet of the second fan 7 is disposed opposite to the evaporator 401. The dry hot air liquefied and emitted by the condenser 403 is sent into the box body 1 through the first fan 5, the air circulation between the heat pump system 4 and the box body 1 is increased through the second fan 7, and the drying efficiency is improved.

As shown in fig. 1, the wind circulation system further includes a wind shielding plate 9 obliquely disposed at the bottom of the casing 1, the wind shielding plate 9 is formed of two oblique baffle plates disposed between the two centrifugal fans, and the wind shielding plate 9 guides the hot dry air blown by the first fan 5 upward. The deep bead 9 that the slope set up furthest with dry hot-air direction top, prevent that dry hot-air from forming the whirl in the middle of two centrifugal fan of box 1 bottom, avoid dry hot-air's loss, improve drying efficiency.

In this embodiment, the control system includes a controller and a time relay connected to the controller, the time relay is used for the time-delay switching-off and time-delay switching-off controller to cyclically control the conveying mechanism 3, the time relay realizes the cyclic control of the time-delay switching-on and time-delay switching-off after the time-delay switching-off formed by the controller, realizes diversified control, and provides drying efficiency in the dewatering time of the sludge on the conveying mechanism 3.

The specific flow is that the sludge is cut into strips by a cutting device 2 at the inlet of a box body 1 and falls onto a mesh conveyor belt, and a control system controls a conveying device 301 to operate to drive the mesh conveyor belt to rotate; the dry hot air of the heat pump system 4 is sent into the interior of the box body 1 through the first fan 5, and is in contact with the sludge on the conveying belt, the sludge is dehydrated, the air passing through the lower-layer conveying belt is blown onto the conveying belt on the upper layer after being evenly blown by the air equalizing plate 8, the sludge on the upper-layer conveying belt is dehydrated, the air which becomes wet and cold finally is sent into the heat pump system 4 through the return air duct 6 to be converted into dry hot air, the dry hot air is circulated and reciprocated, the second fan 7 is further arranged between the other two conveying belts, the box body 1 and the heat pump system 4 are connected through the second fan 7, a small-circulation air circulation is formed, the air circulation is increased, and the drying efficiency is improved.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. The utility model provides a circulation drying system which characterized in that: comprises that

A tank including an inlet and an outlet;

2. The circulation drying system of claim 1, wherein: the conveying mechanism comprises a fender and two conveying devices which are distributed up and down, the fender is obliquely arranged on the upper layer between the tail end of each conveying device and the initial end of each conveying device, and the control system is connected with the conveying devices.

3. The circulation drying system of claim 2, wherein: the conveying device comprises a mesh belt and a speed regulating device for driving the mesh belt to do rotary motion, and the control system is connected with the speed regulating device.

4. The circulation drying system of claim 2, wherein: the air distribution device is characterized by further comprising an air distribution plate, wherein the air distribution plate is arranged in a hollow mode and is arranged between the two conveying devices.

5. The circulation drying system of claim 4, wherein: the air-equalizing plate adopts a punching plate, and the aperture of the punching plate is set to be 11 mm.

6. The circulation drying system of claim 2, wherein: the air circulation system further comprises a second fan, the second fan is arranged between the two conveying devices and communicated with the heat pump system, and an air outlet of the second fan faces towards the inside of the box body.

7. The circulation drying system of claim 6, wherein: the first fan adopts a centrifugal fan, and an air outlet of the centrifugal fan faces upwards.

8. The circulation drying system of claim 7, wherein: the heat pump system comprises a condenser, a compressor and an evaporator which are sequentially connected in series, the air inlet of the first fan is opposite to the condenser, and the air inlet of the second fan is opposite to the evaporator.

9. The circulation drying system of claim 1, wherein: the wind circulation system further comprises a wind shield obliquely arranged at the bottom of the box body, and the wind shield is used for guiding the hot dry air blown by the first fan to the upper part.

10. The circulation drying system of claim 1, 2 or 3, wherein: the control system comprises a controller and a time relay connected with the controller, and the time relay is used for delaying opening and closing the controller to control the conveying mechanism in a circulating mode.