CN216481885U - Closed type drying machine - Google Patents

Abstract

The utility model discloses a closed dryer, wherein in the working process, materials fall onto a drying conveyor from a feeding hole, the drying conveyor drives the materials to move towards a discharging hole, and drying air is driven by a cross flow fan to move in a drying box relative to the materials so as to dry the materials. The drying air absorbs the water vapor and then is conveyed into the drying heater by the air exhaust fan, the drying heater dries and heats the drying air, the content of the water vapor in the drying air is reduced, and the temperature of the drying air is increased, so that the capacity of the drying air for absorbing the water vapor is improved. In the closed type drying machine, the fan driving motor and the drying driving motor are both located on the outer side of the box body, the direct contact of the motor and the drying air is avoided, the corrosion of the drying air to the motor is further avoided, and meanwhile, the motor is prevented from igniting organic matters in the drying air.

Description

Closed type drying machine

Technical Field

The utility model relates to the technical field of dryers, in particular to a closed type dryer.

Background

The closed low-temperature filter cake dryer is a mechanical device for reducing the moisture of materials by utilizing heat energy, and dries a filter cake in a mode of continuously conveying hot air to the filter cake. The existing closed low-temperature filter cake dryer utilizes a shell-free fan and an axial flow fan to drive circulating hot air to vertically blow strip-shaped sludge on a conveying mesh belt, and the saturation of water vapor of the hot drying air is low, so that the water in a filter cake can be taken away. And then dehumidifying the hot drying air to finish drying air circulation.

However, in the existing closed low-temperature filter cake dryer, the shell-less fan and the axial flow fan are installed in the drying air duct of the closed low-temperature filter cake dryer, and the shell-less fan and the axial flow fan are always in a high-temperature and high-humidity working environment. The shell-free fan and the axial flow fan work in a high-temperature and high-humidity environment for a long time, and the service life of the motor is greatly reduced. Meanwhile, the sludge often contains organic solid and organic liquid wastes, the organic liquid wastes can generate flammable and explosive gas after being heated and volatilized, and motors of the shell-free fan and the axial flow fan are potential explosion points and have high potential safety hazards.

Therefore, how to prolong the service life of the motor and reduce the potential safety hazard is a technical problem which needs to be solved urgently by technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a closed type drying machine, which arranges a fan driving motor and a drying driving motor outside a box body, and avoids the direct contact of the motor and gas in the box body, thereby reducing the corrosion of the motor and eliminating potential explosion points in the box body.

In order to achieve the above object, the present invention provides a closed type dryer, comprising a drying box, a drying heater and an air exhaust fan, the drying box comprises a box body, a drying conveyor and a cross flow fan which are positioned in the box body, a feeding hole used for being connected with the outlet of the slitter is arranged at the upper part of the box body, the drying conveyor is positioned below the feeding hole and used for conveying materials, the outlet of the crossflow fan faces the drying conveyor to convey drying air to the materials, the inlet of the air exhaust fan is connected with the drying air outlet of the box body, the outlet of the air exhaust fan is connected with the air inlet of the drying heater, the air outlet of the drying heater is connected with the drying air inlet of the box body so as to send the drying air after drying and heating into the box body, and a fan driving motor and a drying driving motor which are respectively used for driving the cross flow fan and the drying conveyor are arranged on the outer side of the box body.

Preferably, the drying chamber and the installation chamber are arranged in the box body, the drying chamber is located in the middle of the box body, the installation chamber is located at two ends of the box body, the drying conveyor is arranged in the drying chamber, the cross flow fan is arranged in the installation chamber, the cross flow fan corresponds to the end portion of the drying conveyor, and the installation chamber is provided with an air inlet and an air outlet which correspond to an inlet and an outlet of the cross flow fan respectively.

Preferably, the number of the drying conveyors is two or more, the drying conveyors are distributed in the box body along the vertical direction, the conveying directions of two adjacent drying conveyors are opposite, and the projection of the tail end of the drying conveyor positioned above in the two adjacent drying conveyors in the horizontal direction falls on the drying conveyor positioned below.

Preferably, the crossflow fans correspond to the drying conveyors one to one, the mounting chambers are respectively arranged at two ends of the box body, the crossflow fans are mounted in the mounting chambers close to the tail ends of the corresponding drying conveyors, the air inlets of the crossflow fans face the upper sides of the corresponding drying conveyors, and the air outlets of the crossflow fans face the lower sides of the corresponding drying conveyors.

Preferably, a heat exchanger for heating the gas in the drying chamber is further arranged in the installation chamber, and the heat exchanger is positioned between the crossflow fan and the drying chamber.

Preferably, a heat tracing pipeline is arranged in the drying chamber, the heat tracing pipeline comprises a water inlet pipe and a water outlet pipe which are positioned outside the box body and a heat tracing coil pipe which is positioned in the drying chamber, the heat tracing coil pipe is arranged in the drying conveyor, and two ends of the heat tracing coil pipe are respectively connected with the water inlet pipe and the water outlet pipe.

Preferably, the heat exchanger further comprises a water tank, a water pump and a water heater, wherein an inlet of the water pump is connected with the water tank, an outlet of the water pump is connected with the water heater, an inlet of the heat exchanger and the water inlet pipe are both connected with the water heater, and an outlet of the heat exchanger and the water outlet pipe are both connected with the water tank.

Preferably, the lower part of the box body is further provided with a conveying mesh belt for collecting and conveying dust, projections of all the drying conveyors in the horizontal direction fall into the conveying mesh belt, the bottom of the box body is provided with a dust collecting chamber located below the tail end of the conveying mesh belt, and the conveying motor is fixed on the outer side of the box body and connected with the conveying mesh belt.

Preferably, the drying air inlet is located at the lower part of the box body, the drying air outlet is located at the top of the box body, a collection chamber is arranged above the drying air outlet, the air exhaust fan is located above the collection chamber, and the inlet of the air exhaust fan is connected with the collection chamber.

Preferably, the drying heater includes the shell, it is located to go into the wind gap the top of shell, the air exit is located the lateral wall of shell, the middle part of shell is equipped with the regenerator, the shell is inherent the regenerator top forms first air chamber the regenerator below forms the second air chamber, first air chamber and/or be equipped with the evaporimeter that is used for cooling dry air in the second air chamber, the heat medium entry of regenerator with go into the wind gap intercommunication, the refrigerant export of regenerator with the air exit intercommunication, have in the shell and be used for the intercommunication the second air chamber with the switching-over runner of the refrigerant entry of regenerator, the outside of air exit is equipped with the heater of airing exhaust.

Preferably, a water film dedusting mechanism is arranged at the upper part of the first gas chamber, the evaporator comprises a first evaporator positioned between the water film dedusting mechanism and the heat regenerator, a compressor chamber is arranged at the bottom of the shell, an evaporator compressor used for conveying a cooling medium to the evaporator is arranged in the compressor chamber, and the evaporation chamber of the first evaporator is connected with an outlet of the evaporator compressor.

Preferably, the evaporator comprises a second evaporator located below the heat regenerator, an inlet of the reversing flow channel is located below the second evaporator, an evaporation chamber of the second evaporator is connected with an outlet of the evaporator compressor, a water collecting tray used for collecting condensed water is arranged below the second evaporator, and the inlet of the reversing flow channel is located on one side of the water collecting tray.

Preferably, the bottom plate of the water collecting tray comprises two inclined plates which are distributed in a V shape, a flow guide ditch is formed between the two inclined plates, a preset angle is formed between the flow guide ditch and the horizontal plane, and a water outlet is formed in the side wall of the shell corresponding to the lower end of the flow guide ditch.

The utility model provides a closed dryer which comprises a drying box, a drying heater and an air exhaust fan, wherein the drying box comprises a box body, a drying conveyor and a cross flow fan, the drying conveyor and the cross flow fan are positioned in the box body, a feed inlet used for being connected with an outlet of a slitter is formed in the upper portion of the box body, the drying conveyor is positioned below the feed inlet and used for conveying materials, an outlet of the cross flow fan faces the drying conveyor to convey drying air to the materials, an inlet of the air exhaust fan is connected with a drying air outlet of the box body, an outlet of the air exhaust fan is connected with an air inlet of the drying heater, an air outlet of the drying heater is connected with a drying air inlet of the box body so as to convey the drying air after drying and heating into the box body, and a fan driving motor and a drying driving motor which are respectively used for driving the cross flow fan and the drying conveyor are arranged on the outer side of the box body.

In the working process of the closed type drying machine, materials fall onto the drying conveyor from the feeding hole, the drying conveyor drives the materials to move towards the discharging hole, and drying air is driven by the cross flow fan to move relative to the materials in the drying box to dry the materials. The drying air absorbs the water vapor and then is conveyed into the drying heater by the air exhaust fan, the drying heater dries and heats the drying air, the content of the water vapor in the drying air is reduced, and the temperature of the drying air is increased, so that the capacity of the drying air for absorbing the water vapor is improved. In the closed type drying machine, the fan driving motor and the drying driving motor are both located on the outer side of the box body, the direct contact of the motor and the drying air is avoided, the corrosion of the drying air to the motor is further avoided, and meanwhile, the motor is prevented from igniting organic matters in the drying air.

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 embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic diagram of water circulation in a closed-type dryer provided by the present invention;

FIG. 2 is a schematic view of the gas circulation in the enclosed dryer provided by the present invention;

FIG. 3 is a schematic view of the structure of the drying cabinet of FIG. 1;

FIG. 4 is a side view of the left side of the drying cabinet of FIG. 3;

FIG. 5 is a side view of the right side of the drying cabinet of FIG. 3;

FIG. 6 is a rear view of the drying cabinet of FIG. 3;

FIG. 7 is a schematic diagram of the dry heater configuration of FIG. 1;

fig. 8 is a schematic view of the interior of the drying heater of fig. 7.

Wherein the reference numerals in fig. 1 to 8 are:

the drying box 1, the drying heater 2, the water tank 3, the water pump 4, the water heater 5, the air extractor 6, the slitter 7, the box body 11, the drying conveyor 12, the drying driving motor 13, the cross flow fan 14, the heat exchanger 15, the conveying mesh belt 16, the conveying motor 17, the heat tracing pipeline 18, the partition board 111, the water inlet pipe 181, the water outlet pipe 182, the heat tracing coil 183, the shell 21, the water film dust removing mechanism 22, the first evaporator 23, the heat regenerator 24, the second evaporator 25, the water collecting tray 26, the water outlet 27, the reversing flow channel 28, the exhaust heater 29, the evaporator compressor 210, the compressor chamber 211, the water inlet 291 and the water outlet 292.

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.

In order that those skilled in the art will better understand the disclosure, the utility model will be described in further detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 to 8, fig. 1 is a schematic diagram illustrating water circulation in a closed-type dryer according to the present invention; FIG. 2 is a schematic view of the gas circulation in the enclosed dryer provided by the present invention; FIG. 3 is a schematic view of the structure of the drying cabinet of FIG. 1; FIG. 4 is a side view of the left side of the drying cabinet of FIG. 3; FIG. 5 is a side view of the right side of the oven of FIG. 3; FIG. 6 is a rear view of the drying cabinet of FIG. 3; FIG. 7 is a schematic diagram of the dry heater configuration of FIG. 1; fig. 8 is a schematic view of the interior of the drying heater of fig. 7.

The structure of the closed dryer provided by the utility model is shown in figure 2, and comprises a drying box 1, a drying heater 2 and an air exhaust fan 6. Wherein, drying cabinet 1 includes box 11, and box 11 is equipped with dry wind entry and dry wind export. The inlet of the air exhaust fan 6 is connected with the outlet of the drying air, the outlet of the air exhaust fan 6 is connected with the air inlet of the drying heater 2, and the air outlet of the drying heater 2 is connected with the drying air inlet of the box body 11. In the working process, the drying air dries the material in the box body 11, the saturation degree of the water vapor of the drying air is correspondingly improved, the air exhaust fan 6 exhausts the drying air from the box body 11 and conveys the drying air to the drying heater 2, the drying heater 2 cools the drying air firstly to condense and separate the water vapor in the drying air, then the drying air is heated, and the saturated vapor pressure of the water vapor in the drying air is improved, namely the capacity of the drying air for absorbing the water vapor is improved.

A drying conveyor 12 and a cross flow fan 14 are arranged in the box body 11, a feeding hole connected with an outlet of the slitter 7 is formed in the upper portion of the box body 11, and the drying conveyor 12 is located below the feeding hole. The lower part of the box body 11 is provided with a discharge port, and the drying conveyor 12 can drive the material to move towards the discharge port. The outlet of the cross flow fan 14 faces the drying conveyor 12, and the cross flow fan 14 applies work to the drying air to increase the flow velocity of the drying air and convey the drying air to the drying conveyor 12. The drying air and the material on the drying conveyor 12 generate relative movement, so that the evaporation of the water in the material is accelerated. The driving cross flow fan 14 and the drying conveyor 12 are fixed on the outer side of the box 11, specifically, the side wall of the box 11 has a connection hole corresponding to the positions of the drying conveyor 12 and the cross flow fan 14 and penetrating along the thickness direction, and the fan driving motor and the drying driving motor 13 are respectively connected with the cross flow fan 14 and the drying conveyor 12 through the corresponding connection holes.

In addition, a transmission mechanism can be arranged between the drying driving motor 13 and the drying conveyor 12, the specific transmission mechanism comprises an output shaft connected with the drying conveyor 12, a driven shaft parallel to the output shaft and a driving shaft connected with the drying driving motor 13, the driving shaft is connected with the driven shaft through a bevel gear, and the output shaft is connected with the driven shaft through a belt. The drying driving motor 13 may be disposed in parallel with the length direction of the box 11, and drives the drying conveyor 12 to operate through a transmission mechanism. The box 11 is a rectangular parallelepiped, and the longitudinal direction of the box 11 is the extending direction of the long side of the box 11. The arrangement mode of the drying driving motor 13 can reduce the space occupied by the drying box 1, and certainly, a user can also adopt a transmission mechanism with other structures according to needs, and the arrangement mode is not limited herein.

Alternatively, as shown in fig. 3, the cabinet 11 has a drying chamber and an installation chamber therein. The drying chamber is located at the middle of the cabinet 11, and the installation chambers are located at both ends of the cabinet 11. The drying conveyor 12 is disposed in a horizontal direction in the drying chamber. The installation chamber is near the end of the drying conveyor 12, and a crossflow fan 14 is disposed in the installation chamber with the inlet and outlet of the crossflow fan 14 facing the drying conveyor 12. The installation chamber is provided with an air inlet and an air outlet which respectively correspond to the inlet and the outlet of the cross flow fan 14. The cross flow fan 14 extracts the gas in the drying chamber from the air inlet and blows the gas to the material from the air outlet, so as to achieve the purposes of pressurizing the gas and accelerating the speed of the gas flow.

Alternatively, in order to ensure the drying effect, the number of the drying conveyors 12 is usually two or more, and all the drying conveyors 12 are distributed in the vertical direction in the box 11. The conveying directions of two adjacent drying conveyors 12 are opposite, and the projection of the end of the drying conveyor 12 located above in the adjacent two drying conveyors 12 in the horizontal direction falls on the drying conveyor 12 located below. During the conveying process of the drying conveyor 12, the material moves from the head end to the tail end, and then falls to the head end of the next layer of drying conveyor 12 after continuously moving, and then the material is moved by the drying conveyor 12 until the material is conveyed to the discharge port at the lower part of the box body 11 by the lowest layer of drying conveyor 12.

Optionally, the two ends of the box 11 are both provided with installation chambers, and the crossflow fans 14 are in one-to-one correspondence with the drying conveyors 12, that is, the crossflow fans 14 and the drying conveyors 12 corresponding thereto are located at the same horizontal height. The cross flow fan 14 is installed in the installation chamber near the end of the corresponding drying conveyor 12, the air inlet of the cross flow fan 14 faces the upper side of the corresponding drying conveyor 12, and the air outlet faces the lower side of the corresponding drying conveyor 12. In the working process, the materials move on the drying conveyor 12, the cross flow fan 14 conveys the drying air in the opposite direction, and then the relative speed between the drying air and the materials is increased, and the drying of the materials is accelerated. In addition, the side wall of the drying chamber close to one side of the installation chamber is provided with a partition plate, and the partition plate is positioned between two adjacent layers of drying conveyors 12. The partition plate can prevent the drying air blown by the crossflow fan 14 located in the lower layer from directly entering the inlet of the crossflow fan 14 located in the upper layer.

The arrangement of the cross flow fan 14 and the drying conveyor 12 enables the drying air to flow in an S shape from bottom to top, the temperature of the drying air is reduced while the drying air dries the material, and therefore the saturation of the water vapor of the drying air is reduced, and the drying capacity of the drying air is further reduced. To avoid such a situation, a heat exchanger 15 is also provided in the installation chamber, the heat exchanger 15 being located between the crossflow blower 14 and the drying chamber. The drying air enters the cross flow fan 14 through the heat exchanger 15, is pressurized by the cross flow fan 14, and then enters the drying chamber through the heat exchanger 15. The temperature of the drying air is increased after the drying air exchanges heat with the heat exchanger 15, so that more water vapor can be absorbed. Specifically, the heat exchanger 15 includes a plurality of heat exchange tubes, the heat exchange tubes are arranged in a direction parallel to the rotation shaft of the crossflow fan 14, high-temperature hot water is introduced into the heat exchange tubes, and dry air flows between the heat exchange tubes and exchanges heat with the side walls of the heat exchange tubes. In the embodiment shown in the figure, the heat exchangers 15 correspond to the crossflow blowers 14 one-to-one, and mounting plates are provided on both the upper and lower sides of the crossflow blower 14. In addition, the mounting plate is provided with a partition 111 at one end close to the drying chamber, and the partition 111 and the heat exchanger are alternately arranged, so that the mounting chamber is isolated from the drying chamber. Of course, the user may also set the heat exchanger 15 in other manners as needed, for example, one heat exchanger 15 is used to cover the air inlets and the air outlets of the plurality of crossflow fans 14 in the same installation room, which is not limited herein.

Optionally, a heat tracing pipeline 18 is arranged in the drying chamber for accelerating the drying of the material. The heat tracing circuit 18 comprises a water inlet pipe 181, a water outlet pipe 182 and a heat tracing coil 183. As shown in fig. 4 and 6, the water inlet pipe 181 and the water outlet pipe 182 are both located outside the box body 11, the middle part of the heat tracing coil 183 is located in the drying chamber, and both ends of the heat tracing coil 183 are respectively connected with the water inlet pipe 181 and the water outlet pipe 182. Specifically, the heat tracing coils 183 correspond to the drying conveyors 12 one by one, and the middle portions of the heat tracing coils 183 are distributed in an S shape in the corresponding drying conveyors 12. The heat tracing water flows in the heat tracing coil 183, heats the materials on the drying conveyor 12, and finally flows out from the water outlet pipe 182. Still be equipped with the backup pad of 11 length direction of perpendicular box in the box 11, the both ends of backup pad and the lateral wall fixed connection of box 11 are equipped with the via hole that runs through along thickness direction in the backup pad, and heat tracing coil pipe 183 passes from the via hole, and the backup pad plays the supporting role to heat tracing coil pipe 183. Of course, the heat tracing circuit 18 may be distributed in other ways according to the needs of the user, and is not limited herein.

The material will be peeled off by some particles under the blowing of the dry air, and then dust is formed. The increase of dust content in the drying air accelerates the abrasion of the equipment and influences the service life of the equipment. The present application provides a conveyor belt 16 for collecting and conveying dust at the lower part of the box 11. As shown in fig. 3, the mesh belt 16 is located below the drying air inlet, and all projections of the drying conveyor 12 in the horizontal direction fall into the mesh belt 16. The dust falls onto the conveying mesh belt 16 from both ends of the drying conveyor 12 or both sides of the drying conveyor 12 under the blowing of the drying wind. The bottom of the box body 11 is provided with a dust collection chamber positioned below the tail end of the conveying mesh belt 16, and the conveying mesh belt 16 drives the dust to move towards the dust collection chamber and finally enables the dust to fall into the dust collection chamber. The bottom of the dust collecting chamber is provided with a dust discharging port, and a switch door is arranged in the dust discharging port. When the dust in the dust collecting chamber reaches a certain mass or volume, the door is opened to discharge the dust. The opening and closing door can be a gravity turning plate or an electric gate structure under the control of a mass sensor and the like. Alternatively, the mesh belt 16 is driven by a conveyor motor 17. The conveying motor 17 is fixed on the outer side of the box body 11, and the connection mode between the conveying motor 17 and the conveying mesh belt 16 can refer to the connection mode between the drying driving motor 13 and the drying conveyor 12, and is not described in detail herein.

Alternatively, the extraction fan 6 directly from the cabinet 11 may affect the normal flow of the drying air in the cabinet 11. Therefore, a gas collection chamber is arranged above the dry air outlet, the air exhaust fan 6 is positioned above the gas collection chamber, and meanwhile, the inlet of the air exhaust fan 6 is connected with the gas collection chamber. The air collection chamber can reduce the negative pressure at the outlet of the drying air, thereby reducing the influence of the air exhaust fan 6 on the flow of the drying air. The air exhaust fan 6 is usually driven by a centrifugal fan, and an air exhaust motor is arranged outside the air collection chamber, so that the direct contact of the air exhaust motor and the drying air is avoided.

Fan driving motor, dry driving motor 13 and the motor of bleeding all set up in the outside of box 11, therefore can not with dry wind direct contact, avoid the motor to receive dry wind corruption, avoid the motor to ignite the organic matter in the dry wind simultaneously. The bottom of the box body 11 is provided with the conveying net belt 16 which collects dust in the box body 11, so that the subsequent treatment is convenient, the dust is prevented from being accumulated in the box body 11, and the pollutant emission of the drying box 1 is reduced. In addition, the drying conveyors 12 are multi-layered, and the crossflow fans 14 correspond to the drying conveyors 12 one by one, and convey the drying air in the direction opposite to the conveying direction of the corresponding drying conveyors 12, so as to accelerate the drying of the material. In addition, the box body 11 is also internally provided with a heat tracing pipeline 18, and the heat tracing pipeline 18 heats materials while the drying conveyor 12 conveys the materials, so that the drying of the materials is further accelerated.

Alternatively, the dry heater 2 has a structure as shown in fig. 7 and 8, and includes a housing 21, a regenerator 24, and an evaporator. Wherein the air inlet is located at the top of the housing 21 and the wall air outlet is located at the side of the housing 21. The middle part of the shell 21 is provided with a regenerator 24, the regenerator 24 and the air outlet are positioned at the same horizontal height, and the regenerator 24 is hermetically connected with the inner side wall of the shell 21. A heating medium inlet of the heat regenerator 24 is communicated with the air inlet, and a cooling medium outlet of the heat regenerator 24 is communicated with the air outlet. A first gas chamber is formed in the housing 21 above the regenerator 24 and a second gas chamber is formed below the regenerator 24. The drying air enters the housing 21 and then passes through the regenerator 24 to enter the second air chamber. An evaporator for cooling the drying air is arranged in the first air chamber and/or the second air chamber. The heating chamber of the evaporator is communicated with the air inlet, and the evaporation chamber of the evaporator is connected with the low-temperature medium conveying device. After entering the evaporator, the drying air exchanges heat with the low-temperature medium, the temperature is reduced, and water vapor in the drying air is condensed to generate water drops. The water drops flow downwards under the action of gravity to be separated from the drying air, so that the aim of drying the drying air is fulfilled. The housing 21 has a reversing flow channel 28 for communicating the second air chamber with a refrigerant inlet of the regenerator 24, an inlet of the reversing flow channel 28 is located below the evaporator and the regenerator 24, and the dried air flows into the refrigerant inlet of the regenerator 24 along the reversing flow channel 28 and exchanges heat with the undried air in the regenerator 24, so that the temperature of the dried air is raised. An exhaust heater 29 is arranged outside the air outlet, and the exhaust heater 29 can heat the dried air to further reduce the saturation of the water vapor in the dried air.

The drying air entering the drying heater 2 tends to still contain a certain amount of dust. The upper part of the first air chamber is provided with a dust removal mechanism, and the dust removal mechanism can process the drying air and remove dust in the drying air. The dust removing mechanism can be embodied as a filter or an electrostatic dust removing mechanism, etc. The dust removal mechanism in a specific embodiment of this application is water film dust removal mechanism 22, and it has advantages such as simple structure, dust removal effect are good, the water consumption end.

Optionally, the evaporator includes a first evaporator 23 and a second evaporator 25, and the first evaporator 23 is located between the water film dust removal mechanism 22 and the heat regenerator 24. The second evaporator 25 is located below the regenerator 24. The first evaporator 23 may be specifically a water-cooling-assisted evaporator, a compressor chamber 211 is disposed at the bottom of the housing 21, an evaporator compressor 210 is disposed in the compressor chamber 211, and an evaporation chamber of the first evaporator 23 is connected to an outlet of the evaporator compressor 210. The evaporator compressor 210 delivers the low-temperature medium to the evaporation chamber of the first evaporator 23, and exchanges heat with the drying air to lower the temperature of the drying air. The evaporation chamber of the second evaporator 25 is connected to the outlet of the evaporator compressor 210, and the low temperature medium further exchanges heat with the drying air to lower the temperature of the drying air. The inlet of the reversing flow channel 28 is located below the second evaporator 25, and the dry air cooled by the second evaporator 25 enters the reversing flow channel 28.

In addition, condensation can be generated in the drying process of the drying air, and the condensation can be accumulated in the shell 21 to influence the drying and heat exchange of the drying air. In one embodiment of the present application, a water collecting tray 26 is disposed below the second evaporator 25, the outer periphery of the water collecting tray 26 is hermetically connected to the side wall of the second air chamber, and the condensed water generated by the drying air flows into the water collecting tray 26 along the side wall of the second air chamber. The inlet of the reversing channel 28 is located at one side of the water collecting tray 26, and the direction of the air flow speed changes when the drying air enters the reversing channel 28 from the second air chamber. The condensation density in the drying air is higher, so that the centrifugal force is higher in the reversing process. The condensation falls downwardly into the water collection tray 26 under the action of centrifugal force, and the gas with lower density smoothly changes direction and enters the reversing channel.

The bottom plate of the water collection tray 26 includes two sloping plates, as shown in fig. 8, the two sloping plates are distributed in a V-shape, and a flow guide channel is formed between the two sloping plates. As shown in fig. 7, the guide channel has a predetermined angle with the horizontal plane, and a drain opening 27 is formed in the sidewall of the housing 21 corresponding to the lower end of the guide channel. The drain port 27 is provided with a switching valve which is opened to drain the condensed water in the casing 21 when the liquid level in the water collecting tray 26 reaches a predetermined height. In addition, the water outlet 27 may be connected to a wastewater treatment facility, and wastewater discharged from the drying heater 2 may be discharged after reaching a discharge standard after flowing into the wastewater treatment facility for treatment.

Alternatively, the exhaust air heater 29 is a hot water heater 5 that heats the drying air by hot water. Specifically, a refrigerant inlet of the hot water heater 5 is connected with the air outlet, a water inlet 291 of the hot water heater 5 is connected with the hot water pump 4, and a water outlet 292 of the hot water heater 5 is connected with the water tank 3. The hot water pump 4 conveys hot water to the hot water heater 5 to exchange heat with the drying air, and the temperature of the drying air is increased. Of course, the user may also use electric heating or other heating methods as required, and is not limited herein.

Optionally, the drying air or the material is heated by hot water at a plurality of positions in the closed drying machine, so that the closed drying machine is also provided with a hot water system. Specifically, the hot water system includes a water tank 3, a water pump 4, and a water heater 5. As shown in fig. 1, an inlet of the water pump 4 is connected to the water tank 3, an outlet of the water pump 4 is connected to the water heater 5, the water pump 4 pumps water in the water tank 3 and delivers it to the water heater 5, and the water heater 5 heats to form hot water. The inlet of the heat exchanger 15, the exhaust air heater 29 and the water inlet pipe 181 are arranged in parallel and are connected with the water heater 5. The outlet of the hot water heat exchanger 15 and the water outlet pipe 182 are both connected to the water tank 3. Water forms water circulation in a hot water system, so that on one hand, energy can be effectively utilized, and on the other hand, the waste water discharge can be reduced.

In this embodiment, the drying heater 2 exchanges heat between the undried drying air and the dried drying air through the heat regenerator 24, so that the temperature of the dried drying air is increased, the heat of the undried drying air is effectively utilized, and the energy consumption in the drying and heating process is reduced. In addition, a hot water system is also arranged in the closed type dryer, and the hot water system provides hot water for the heat exchanger 15, the exhaust air heater 29 and the heat tracing pipeline 18 and realizes water circulation. Can effectively utilize energy and reduce the discharge of waste water.

It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.

The closed-type dryer provided by the present invention is described in detail above. The principles and embodiments of the present invention have been described herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims (13)

1. The utility model provides a closed desiccator, its characterized in that, includes drying cabinet (1), dry heater (2) and suction fan (6), drying cabinet (1) includes box (11), is arranged in dry conveyer (12) and crossflow fan (14) of box (11), box (11) upper portion is equipped with the feed inlet that is used for linking to each other with slitter (7) export, dry conveyer (12) are located the below of feed inlet is used for carrying the material, the export orientation of crossflow fan (14) dry conveyer (12) are in order to carry dry wind to the material, suction fan's (6) entry with the dry wind export of box (11) links to each other, suction fan's (6) export with the income wind gap of dry heater (2) links to each other, the air exit of dry heater (2) with the dry wind entry of box (11) links to each other, So as to send the dried and heated drying air into the box body (11), and a fan driving motor and a drying driving motor (13) which are respectively used for driving the cross flow fan (14) and the drying conveyor (12) are arranged on the outer side of the box body (11).

2. The enclosed dryer of claim 1, characterized in that the box (11) has a drying chamber and an installation chamber therein, the drying chamber is located in the middle of the box (11), the installation chamber is located at both ends of the box (11), the drying conveyor (12) is disposed in the drying chamber, the cross flow fan (14) is disposed in the installation chamber, the cross flow fan (14) corresponds to the end of the drying conveyor (12), and the installation chamber is provided with an air inlet and an air outlet corresponding to the inlet and the outlet of the cross flow fan (14), respectively.

3. The closed-type dryer according to claim 2, wherein the number of the drying conveyors (12) is two or more, and the drying conveyors are distributed in the box body (11) along a vertical direction, the conveying directions of two adjacent drying conveyors (12) are opposite, and the projection of the tail end of the drying conveyor (12) positioned above in the two adjacent drying conveyors (12) in the horizontal direction falls on the drying conveyor (12) positioned below.

4. The closed type drying machine according to claim 3, wherein the cross flow fans (14) correspond to the drying conveyors (12) one by one, the mounting chambers are respectively arranged at two ends of the box body (11), the cross flow fans (14) are mounted in the mounting chambers close to the tail ends of the corresponding drying conveyors (12), the air inlets of the cross flow fans (14) face the upper sides of the corresponding drying conveyors (12), and the air outlets of the cross flow fans face the lower sides of the corresponding drying conveyors (12).

5. The closed type dryer according to claim 4, wherein a heat exchanger (15) for heating drying air is further provided in the installation chamber, the heat exchanger (15) being located between the crossflow blower (14) and the drying chamber.

6. The closed-type dryer according to claim 5, wherein a heat tracing pipeline (18) is arranged in the drying chamber, the heat tracing pipeline (18) comprises a water inlet pipe (181) and a water outlet pipe (182) which are positioned outside the box body (11) and a heat tracing coil (183) which is positioned in the drying chamber, the heat tracing coil (183) is arranged in the drying conveyor (12), and two ends of the heat tracing coil (183) are respectively connected with the water inlet pipe (181) and the water outlet pipe (182).

7. The closed-type dryer according to claim 6, further comprising a water tank (3), a water pump (4) and a water heater (5), wherein an inlet of the water pump (4) is connected with the water tank (3), an outlet of the water pump (4) is connected with the water heater (5), an inlet of the heat exchanger (15) and the water inlet pipe (181) are both connected with the water heater (5), and an outlet of the heat exchanger (15) and the water outlet pipe (182) are both connected with the water tank (3).

8. The closed type drying machine according to any one of claims 1 to 7, characterized in that the lower part of the box body (11) is further provided with a conveying mesh belt (16) for collecting and conveying dust, the projection of all the drying conveyors (12) in the horizontal direction falls into the conveying mesh belt (16), the bottom of the box body (11) is provided with a dust collection chamber below the tail end of the conveying mesh belt (16), and a conveying motor (17) is fixed on the outer side of the box body (11) and connected with the conveying mesh belt (16).

9. The closed type drying machine according to any one of claims 1 to 7, wherein the drying air inlet is located at the lower part of the box body (11), the drying air outlet is located at the top part of the box body (11), a collection chamber is arranged above the drying air outlet, the air exhaust fan (6) is located above the collection chamber, and the inlet of the air exhaust fan (6) is connected with the collection chamber.

10. The hermetic dryer according to any one of claims 1 to 7, wherein the drying heater (2) comprises a housing (21), the air inlet is located at the top of the housing (21), the air outlet is located at the side wall of the housing (21), a heat regenerator (24) is provided at the middle of the housing (21), a first air chamber is formed in the housing (21) above the heat regenerator (24), a second air chamber is formed below the heat regenerator (24), an evaporator for cooling the drying air is provided in the first air chamber and/or the second air chamber, a heat medium inlet of the heat regenerator (24) is communicated with the air inlet, a refrigerant outlet of the heat regenerator (24) is communicated with the air outlet, a reversing flow passage (28) for communicating the second air chamber with the refrigerant inlet of the heat regenerator (24) is provided in the housing (21), and an exhaust heater (29) is arranged on the outer side of the exhaust outlet.

11. The enclosed dryer of claim 10, characterized in that the upper part of the first air chamber is provided with a water dedusting mechanism (22), the evaporator comprises a first evaporator (23) located between the water dedusting mechanism (22) and the heat regenerator (24), the bottom of the housing (21) is provided with a compressor chamber (211), the compressor chamber (211) is provided with an evaporator compressor (210) for delivering a cooling medium to the evaporator, and the evaporation chamber of the first evaporator (23) is connected with an outlet of the evaporator compressor (210).

12. The hermetic dryer according to claim 11, wherein the evaporator comprises a second evaporator (25) located below the regenerator (24), an inlet of the reversing flow channel (28) is located below the second evaporator (25), an evaporation chamber of the second evaporator (25) is connected with an outlet of the evaporator compressor (210), a water collection tray (26) for collecting condensed water is located below the second evaporator (25), and an inlet of the reversing flow channel (28) is located at one side of the water collection tray (26).

13. The hermetic dryer according to claim 12, wherein the bottom plate of the water collecting tray (26) comprises two inclined plates distributed in a V-shape, a flow guiding trench is formed between the two inclined plates, a predetermined angle is formed between the flow guiding trench and a horizontal plane, and a drainage port (27) is formed on a side wall of the housing (21) corresponding to a lower end of the flow guiding trench.

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