阅读说明：本技术 一种烘干产线及其控制方法 (Drying production line and control method thereof ) 是由 唐道轲 王双 温德平 吴文伟 王高明 张汉杰 孟腾飞 于 2021-11-11 设计创作，主要内容包括：本发明公开了一种烘干产线及其控制方法,其在进行烘干工艺时,驱动组件驱动多个载料单元依次穿过多个烘干设备；一方面,由于设置多个烘干设备,每一个烘干设备可以配置对应的烘干参数,不需要在单个烘干设备上设置多个烘干参数,降低了烘干工艺各阶段的控制要求,避免出现烘干产线失效的问题,避免物料被闷坏的结果；另一方面,各载料单元能依次穿过多个烘干设备,使得不同组的载料单元能够在同一时间分别进行不同的烘干工序,即该烘干产线能够同时对多组载料单元上的物料进行烘干,从而相邻批次的物料的完成时间差值减少,生产效率提高；因此,本发明的烘干产线及其控制方法控制简单不易闷坏物料且生产效率高。(The invention discloses a drying production line and a control method thereof, wherein when a drying process is carried out, a driving assembly drives a plurality of loading units to sequentially pass through a plurality of drying devices; on one hand, because a plurality of drying devices are arranged, each drying device can be configured with corresponding drying parameters, and a plurality of drying parameters do not need to be arranged on a single drying device, the control requirements of each stage of the drying process are reduced, the problem of failure of a drying production line is avoided, and the result that materials are damaged by suffocation is avoided; on the other hand, each material loading unit can sequentially pass through a plurality of drying devices, so that different groups of material loading units can respectively perform different drying processes at the same time, namely, the drying production line can simultaneously dry materials on a plurality of groups of material loading units, the finishing time difference of the materials of adjacent batches is reduced, and the production efficiency is improved; therefore, the drying production line and the control method thereof are simple to control, are not easy to blank materials and have high production efficiency.)

1. A drying line, characterized by comprising a track unit (13) and a plurality of drying devices (20), wherein different drying devices (20) are used for performing dehumidification processes with different moisture contents, and the plurality of drying devices (20) are sequentially arranged on the track unit (13) along the extension direction of the track unit (13);

the track unit (13) is also connected with a plurality of groups of loading units (14) which are connected end to end in a sliding manner, and the track unit (13) is also provided with a driving assembly (15) which is used for conveying each loading unit (14) into the corresponding drying equipment (20).

2. The drying production line according to claim 1, wherein the drying device (20) comprises a drying casing (21) having a circulation space therein, wherein two side casings of the drying casing (21) are respectively provided with a passage opening along the extending direction, and a drying station (22) is formed between the two passage openings;

a fan unit (23), a dehumidification unit (24) and a drying inner unit (25) are further arranged in the drying shell (21), and along the air outlet direction of the fan unit (23), the air outlet of the fan unit (23), the drying station (22), the drying inner unit (25) and the air inlet of the fan unit (23) are sequentially arranged to form a circulation channel;

the dehumidifying unit (24) is arranged between the drying station (22) and the drying internal unit (25) and is independent of the circulating channel.

3. The drying line of claim 2, wherein any two of the drying devices (20) disposed adjacently are disposed such that the fan unit (23) of one of the drying devices (20) is disposed at a first side of the drying station (22) thereof, and the fan unit (23) of the other drying device (20) is disposed at a second side of the drying station (22) thereof.

4. The drying production line according to claim 2, characterized in that a partition (27) is arranged in the drying casing (21), and the partition (27) seals a gap between the drying inner machine unit (25) and an air inlet of the fan unit (23); a negative pressure area (271) is formed between the drying inner machine unit (25) and an air inlet of the fan unit (23) in the circulating channel;

in the circulation channel, a positive pressure area (272) is formed between the air outlet of the fan unit (23) and the drying inner machine unit (25).

5. The drying line according to claim 4, characterized in that, inside said negative pressure zone (271), said drying internal machine unit (25) is arranged opposite to said fan unit (23).

6. The drying line according to claim 4, characterized in that, inside the negative pressure zone (271), the drying internal machine unit (25) is arranged on top of the fan unit (23).

7. Drying line according to claim 2, wherein said dehumidification unit (24) comprises a dehumidification channel and a fresh air drying channel;

the dehumidification channel is communicated with the circulation channel and the external environment and is used for discharging humid gas from the circulation channel; the fresh air drying channel is communicated with the external environment and the circulating channel and is used for introducing drying gas into the circulating channel;

the dehumidification outlet of the dehumidification channel is provided with a dehumidification fan (241), and the fresh air drying inlet of the fresh air drying channel is provided with an air valve (242).

8. The drying line according to any one of claims 2 to 7, wherein the drying enclosure (21) is further provided with a monitoring sensor (281) for detecting the presence of the loading unit (14), a temperature and humidity sensor (282) for detecting temperature and humidity, and a main control unit (283);

the main control unit (283) is electrically connected with the dehumidification unit (24), the temperature and humidity sensor (282) and the monitoring sensor (281) respectively.

9. A control method, applied to the drying line according to any one of claims 1 to 8, specifically comprising:

when a material loading unit is detected to be arranged in the drying equipment, the temperature in the drying equipment is increased to a preset dry ball temperature;

dehumidifying the air flow within the drying apparatus;

acquiring a humidity value in a shell in the drying equipment;

judging whether the humidity value in the shell is less than or equal to a preset humidity threshold value or not;

if not, returning to execute the steps: dehumidifying the air flow within the drying apparatus;

if so, not dehumidifying the airflow in the drying equipment;

and when the time for baking the materials reaches a preset total drying time value S, moving the material loading unit to the next drying device through the driving assembly.

10. The control method according to claim 9, wherein the loading unit comprises a plurality of loading vehicles, and the drying apparatus further comprises a material humidity sensor for acquiring loading humidity of the loading vehicles;

the steps are as follows: when detecting be equipped with in the drying equipment and carry the material unit, make temperature in the drying equipment improves to preset dry-bulb temperature, still includes before:

acquiring a loading humidity value of each loading vehicle, wherein the loading humidity value comprises a loading humidity maximum value and a loading humidity minimum value, and acquiring a loading humidity difference value according to the difference between the loading humidity maximum value and the loading humidity minimum value;

presetting a starting time value n and a starting duration value t of a dehumidifying fan of the drying equipment every hour;

the steps are as follows: dehumidifying the air flow in the drying device, specifically comprising:

judging whether the loading humidity difference value is larger than or equal to a preset loading humidity difference threshold value or not;

if so, continuously starting the dehumidification fan until the humidity value in the shell is less than or equal to the humidity threshold value;

if not, the dehumidification fan is started at intervals within the preset total drying time value S according to the starting times per hour value n and the starting duration value t.

Technical Field

The invention relates to the technical field of material drying, in particular to a drying production line and a control method thereof.

Background

The drying production line refers to a device for heating and warming materials to evaporate moisture of the materials and remove the evaporated moisture in time; a split heat pump dryer or an integral dryer is generally configured in a specific drying production line to perform drying operation on a fixed space (such as a tobacco flue-curing house and a drying house); after the materials are placed into the dryer, the dryer can set corresponding dryer parameter values for each drying stage according to drying requirements, and different dryer parameter values can be correspondingly switched to dry the materials in stages along with the promotion of a drying process after the materials are placed into the dryer.

There are two problems in the stoving production line mentioned above:

firstly, the drying production line dries the material in a multi-section manner through a single dryer, so that the control of each stage is complex, the requirements on each control of the dryer are high, the problem of unit failure is easy to occur, and the serious result that the material is sultled is finally caused; for example, the material is dried in three stages, the first stage of drying reduces the humidity of the material to 70%, the second stage of drying reduces the humidity of the material to 60%, the third stage of drying reduces the humidity of the material to 50%, and the specific control parameters (such as the working time of the dehumidifying unit, the opening and closing intervals of the dehumidifying unit, the heating power of the drying unit, etc.) of each drying stage are different due to different target values of the humidity, so that a large number of parameters need to be changed in the switching process of different stages, and meanwhile, many control parameters are adjusted by the feedback value of the sensor in the dryer; therefore, the condition that the same parameter value is regulated by two factors may occur (for example, a certain parameter value changes due to stage switching and changes due to the change of the feedback value of the sensor), so that the control of the parameter value of the dryer is disordered, the dryer is disabled, and finally the material is damaged.

Secondly, each batch of materials needs to be heated and dehumidified in multiple stages in the same dryer, and single drying can be completed only after dozens of hours, namely the drying completion time of each batch of materials is different from dozens of hours, so that the production efficiency is low.

Therefore, a drying production line needs to be developed, and the problems that the drying production line in the prior art is complex in control and low in efficiency are solved.

Disclosure of Invention

The invention aims to provide a drying production line and a control method thereof, and solves the problems that the drying production line in the prior art is complex in control and low in efficiency.

In order to achieve the purpose, the invention adopts the following technical scheme:

a drying production line comprises a track unit and a plurality of drying devices, wherein different drying devices are used for executing dehumidification processes with different moisture contents, and the plurality of drying devices are sequentially arranged on the track unit along the extending direction of the track unit;

the rail unit is also connected with a plurality of groups of loading units which are connected end to end in a sliding manner, and the rail unit is also provided with a driving assembly which is used for conveying each loading unit into the corresponding drying equipment.

Optionally, the drying device includes a drying casing having a circulation space therein, the casing on both sides of the drying casing is respectively provided with a channel along the extending direction, and a drying station is formed between the two channel;

a fan unit, a dehumidification unit and a drying inner unit are further arranged in the drying shell, and an air outlet of the fan unit, the drying station, the drying inner unit and an air inlet of the fan unit are sequentially arranged along the air outlet direction of the fan unit to form a circulation channel;

the dehumidification unit is arranged between the drying station and the drying inner unit and is independent of the circulation channel.

Optionally, in any two of the drying devices arranged adjacently, the fan unit of one of the drying devices is arranged at a first side of the drying station thereof, and the fan unit of the other drying device is arranged at a second side of the drying station thereof.

Optionally, a partition plate is arranged in the drying shell, and the partition plate seals a gap between the drying inner unit and an air inlet of the fan unit; a negative pressure area is formed between the drying inner machine unit and the air inlet of the fan unit in the circulating channel;

and a positive pressure area is formed between the air outlet of the fan unit and the drying inner unit in the circulating channel.

Optionally, in the negative pressure region, the drying inner unit is arranged opposite to the fan unit.

Optionally, in the negative pressure region, the drying inner unit is disposed at the top of the fan unit.

Optionally, the dehumidification unit comprises a dehumidification channel and a fresh air drying channel;

the dehumidification channel is communicated with the circulation channel and the external environment and is used for discharging humid gas from the circulation channel; the fresh air drying channel is communicated with the external environment and the circulating channel and is used for introducing drying gas into the circulating channel;

the dehumidification outlet of the dehumidification channel is provided with a dehumidification fan, and the fresh air drying inlet of the fresh air drying channel is provided with an air valve.

Optionally, a monitoring sensor for detecting whether the loading unit exists, a temperature and humidity sensor for detecting temperature and humidity, and a main control unit are further arranged in the drying shell;

the main control unit is electrically connected with the dehumidification unit, the temperature and humidity sensor and the monitoring sensor respectively.

A control method is applied to the drying production line and specifically comprises the following steps:

when a material loading unit is detected to be arranged in the drying equipment, the temperature in the drying equipment is increased to a preset dry ball temperature;

dehumidifying the air flow within the drying apparatus;

acquiring a humidity value in a shell in the drying equipment;

judging whether the humidity value in the shell is less than or equal to a preset humidity threshold value or not;

if not, returning to execute the steps: dehumidifying the air flow within the drying apparatus;

if so, not dehumidifying the airflow in the drying equipment;

and when the time for baking the materials reaches a preset total drying time value S, moving the material loading unit to the next drying device through the driving assembly.

Optionally, the loading unit comprises a plurality of loading vehicles, and the drying device further comprises a material humidity sensor, wherein the material humidity sensor is used for acquiring loading humidity of the loading vehicles;

the steps are as follows: when detecting be equipped with in the drying equipment and carry the material unit, make temperature in the drying equipment improves to preset dry-bulb temperature, still includes before:

acquiring a loading humidity value of each loading vehicle, wherein the loading humidity value comprises a loading humidity maximum value and a loading humidity minimum value, and acquiring a loading humidity difference value according to the difference between the loading humidity maximum value and the loading humidity minimum value;

presetting a starting time value n and a starting duration value t of a dehumidifying fan of the drying equipment every hour;

the steps are as follows: dehumidifying the air flow in the drying device, specifically comprising:

judging whether the loading humidity difference value is larger than or equal to a preset loading humidity difference threshold value or not;

if so, continuously starting the dehumidification fan until the humidity value in the shell is less than or equal to the humidity threshold value;

if not, the dehumidification fan is started at intervals within the preset total drying time value S according to the starting times per hour value n and the starting duration value t.

Compared with the prior art, the invention has the following beneficial effects:

according to the drying production line and the control method thereof, when the drying process is carried out, the driving assembly drives the plurality of loading units to sequentially penetrate through the plurality of drying devices; on one hand, because a plurality of drying devices are arranged, different drying devices are used for executing dehumidification procedures with different moisture contents, namely each drying device can be configured with corresponding drying parameters, a plurality of drying parameters are not required to be arranged on a single drying device, the control requirements of each stage of the drying process are reduced, the problem of failure of a drying production line is avoided, and the result that materials are damaged due to sultry is avoided; on the other hand, each material loading unit can sequentially pass through a plurality of drying devices, so that different groups of material loading units can respectively perform different drying processes at the same time, namely, the drying production line can simultaneously dry materials on a plurality of groups of material loading units, the finishing time difference of the materials of adjacent batches is reduced, and the production efficiency is improved; therefore, the drying production line and the control method thereof are simple to control, are not easy to blank materials and have high production 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 description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

The structure, proportion, size and the like shown in the drawings are only used for matching with the content disclosed in the specification, so that the person skilled in the art can understand and read the description, and the description is not used for limiting the limit condition of the implementation of the invention, so the method has no technical essence, and any structural modification, proportion relation change or size adjustment still falls within the scope of the technical content disclosed by the invention without affecting the effect and the achievable purpose of the invention.

Fig. 1 is a schematic top view of a drying production line according to an embodiment of the present invention;

fig. 2 is a schematic front view of a drying production line according to an embodiment of the present invention;

fig. 3 is a schematic view of a first internal structure of the drying apparatus according to the embodiment of the present invention;

fig. 4 is a schematic view of a second internal structure of the drying apparatus according to the embodiment of the present invention;

fig. 5 is a third internal structural schematic diagram of the drying apparatus according to the embodiment of the present invention;

fig. 6 is a schematic diagram of a fourth internal structure of the drying apparatus according to the embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a dehumidification unit according to an embodiment of the present invention;

fig. 8 is a schematic control diagram of a drying apparatus according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a driving assembly according to an embodiment of the present invention;

fig. 10 is a schematic view of the transportation principle of the driving assembly according to the embodiment of the present invention.

Illustration of the drawings: 11. a feeding position; 12. discharging the material level; 13. a track unit; 14. a loading unit; 15. a drive assembly; 151. a drive motor; 1521. a first transmission member; 1522. a second transmission member; 153. a speed reducer; 154. a drive sprocket; 155. a driven sprocket; 156. a chain; 1571. a start position sensor; 1572. an end position sensor; 158. pushing the plate;

20. a drying device; 21. drying the shell; 22. a drying station; 23. a fan unit; 24. a dehumidification unit; 241. a dehumidification fan; 242. an air valve; 243. a full-effect heat exchanger; 244. a drying section; 25. drying the inner unit; 26. a drying outer machine unit; 27. a partition plate; 271. a negative pressure region; 272. a positive pressure region; 273. a fan mounting plate; 274. an inner machine mounting plate; 281. monitoring a sensor; 282. a temperature and humidity sensor; 283. a main control unit;

31. a sealing unit; 32. a partition part; 40. a feed unit; 50. a temperature raising unit; 60. a discharging unit; 70. a humidifying unit; 71. a water vapor nozzle; 72. a humidifying fan.

Detailed Description

In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below 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 the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. It should be noted that when one component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present.

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

Referring to fig. 1 to 10, fig. 1 is a schematic top view structure diagram of a drying production line provided in an embodiment of the present invention, fig. 2 is a schematic front view structure diagram of the drying production line provided in the embodiment of the present invention, fig. 3 is a schematic first internal structure diagram of the drying device in the embodiment of the present invention, fig. 4 is a schematic second internal structure diagram of the drying device in the embodiment of the present invention, fig. 5 is a schematic third internal structure diagram of the drying device in the embodiment of the present invention, fig. 6 is a schematic fourth internal structure diagram of the drying device in the embodiment of the present invention, fig. 7 is a schematic structural diagram of a dehumidifying unit in the embodiment of the present invention, fig. 8 is a schematic control principle diagram of the drying device in the embodiment of the present invention, fig. 9 is a schematic structural diagram of a driving assembly in the embodiment of the present invention, and fig. 10 is a schematic transportation principle diagram of the driving assembly in the embodiment of the present invention.

Example one

The drying production line provided by the embodiment of the invention is applied to drying scenes such as tobacco drying, tea drying, wood drying, marine product drying and the like, improves the structure of the drying production line, improves the production efficiency of the drying production line, and is not easy to cause the situation that materials are stuffy.

As shown in fig. 1 to 2, the drying production line of the present embodiment includes a feeding location 11, a discharging location 12, and a plurality of drying devices 20, wherein a track unit 13 is disposed between the feeding location 11 and the discharging location 12, wherein different drying devices 20 are used for performing dehumidification processes with different moisture contents; the plurality of drying devices 20 are sequentially disposed on the rail unit 13 along the extending direction of the rail unit 13. It should be noted that, in this embodiment, the number of the drying devices 20 is three, and different parameters are configured for each drying device, for example, target humidity of the material obtained by the three drying devices 20 along the extending direction in fig. 1 is RH1, RH2, and RH3, respectively, where RH1> RH2> RH 3. It is also necessary to supplement that the rail unit 13 functions to carry the loading unit 14 and to limit the sliding direction of the loading unit 14.

The rail unit 13 is also connected with a plurality of end-to-end material loading units 14 in a sliding manner, and the plurality of material loading units 14 can sequentially penetrate through the drying devices 20. The material loading units 14 comprise a plurality of material loading vehicles, and a single material loading vehicle is used for loading materials to be dried, in the embodiment, the number of the material loading units 14 is two, and each group of the material loading units 14 comprises three material loading vehicles; for example, when the first set of loading units 14 is located in the second drying apparatus 20 for drying, the second set of loading units 14 may be located in the first drying apparatus 20 for drying.

The rail unit 13 is further provided with a driving assembly 15 for driving the loading unit 14 to move along the rail unit 13.

Specifically, when the drying process is performed, the driving assembly 15 drives the plurality of loading units 14 to sequentially pass through the plurality of drying devices 20; on one hand, because a plurality of drying devices 20 are arranged, each drying device 20 can be configured with corresponding drying parameters, and a plurality of drying parameters do not need to be arranged on a single drying device 20, the control requirements of each stage of the drying process are reduced, the problem of failure of a drying production line is avoided, and the result that materials are damaged too stiffly is avoided; on the other hand, each material loading unit 14 can sequentially pass through the plurality of drying devices 20, so that different groups of material loading units 14 can respectively perform different drying processes at the same time, that is, the drying production line can simultaneously dry materials on a plurality of groups of material loading units 14, thereby reducing the difference of the completion time of the materials of adjacent batches and improving the production efficiency; therefore, the drying production line and the control method thereof are simple to control, are not easy to blank materials and have high production efficiency.

It is also necessary to supplement that a feeding unit 40 and a temperature rising unit 50 are sequentially arranged between the feeding level 11 and the first drying device 20 along the extending direction.

Specifically, the feeding unit 40 is located at the foremost end of the drying production line, and is tightly connected with the next heating unit 50 for reducing air leakage; wherein, the inlet of the feeding unit 40 is provided with a sealing unit 31 such as rubber or brush, etc. to fill the gap and further reduce air leakage; at least 1 isolation plate is arranged in the feeding unit 40, a material passing opening is formed in the isolation plate, and a sealing unit 31 such as rubber or a brush is further arranged at the material passing opening and used for preventing air leakage; the inlet of the feeding unit 40 is also provided with a movable sealing door for plugging the inlet of the feeding unit 40 and preventing air leakage.

The warming unit 50 is similar to the drying apparatus 20 except that the warming unit 50 does not include a dehumidifying unit 24 therein for first heating of the materials, which is disposed between the feeding unit 40 and the first drying apparatus 20.

It is also necessary to supplement that a discharging unit 60 and a humidifying unit 70 are arranged between the last drying device 20 and the discharging position 12 in sequence along the extending direction.

Specifically, the discharging unit 60 is closely connected with the last drying device 20 for preventing air leakage; a sealing unit 31 such as rubber or a brush is arranged at the inlet of the discharging unit 60 to fill the gap and reduce air leakage; furthermore, at least 1 partition board is arranged in the discharging unit 60, a material passing hole is formed in the partition board, and a sealing unit 31 such as a rubber sheet or a brush is further arranged at the material passing hole to further prevent air leakage; and a movable sealing door is arranged at the outlet of the discharging unit 60 and used for plugging the discharging door to prevent air leakage.

Humidification unit 70 and ejection of compact unit 60 room body zonulae occludens for the material toasts the back that finishes, carries out the moisture regain processing to the surface of material, prevents to lead to the fact the material to dry out because of humidity is low excessively to split, and humidification unit 70 is inside to be provided with steam nozzle 71, and its inside top layer is regional to set up humidification fan 72, can guarantee that humidity permeates the material the inside fast.

On the basis, for the processing units such as the drying device 20, the feeding unit 40, the warming unit 50, the discharging unit 60 and the humidifying unit 70, a partition part 32 is arranged between any two adjacent processing units and used for preventing the adjacent processing units from wind cross, and the partition part 32 is provided with material passing openings corresponding to the track unit 13 and the material loading unit 14 and used for the material loading unit 14 to pass through; the clearance between the material passing opening and the material is 50 mm-250 mm, the edge of the material passing opening is also provided with a sealing unit 31 made of rubber skin, a brush or other heat insulation materials for sealing, the sealing unit is well jointed with the material carrying vehicle and the material, the normal running of the material carrying vehicle is ensured, and the circulating wind between the processing units can not be disturbed. The length of the processing unit is the sum of the length of the loading unit 14 and the gap setting value, and more specifically, the sum of the total length of the plurality of loading vehicles in the loading unit 14 and the gap setting value.

Next, the principle of the driving assembly 15 is described, as shown in fig. 9 and 10, the distance between the start position sensor 1571 and the end position sensor 1572 is the same as the length of the truck; when the loading unit 14 needs to be moved and the start position sensor 1571 and the end position sensor 1572 both detect loading, the driving motor 151 rotates to drive the driving sprocket 154 to rotate through the first transmission part 1521, the speed reducer 153 and the second transmission part 1522, so that the driving sprocket 154 drives the driven sprocket 155 to rotate through the chain 156, and the pushing plate 158 is driven to move along with the rotation of the chain 156 to drive the loading vehicle to move to the next station. The number of the driving assemblies 15 in the drying production line is not limited, a driving assembly 15 may be disposed at the bottom of each drying device 20 to push the loading unit 14 on each station, and it is also necessary to supplement that the loading vehicles are connected end to end, and even if the loading vehicle is not directly driven by the driving assembly 15, the loading vehicle is pulled by the previous loading vehicle or pushed by the next loading vehicle.

Further, as shown in fig. 4 to 6, the drying apparatus 20 includes a drying housing 21 having a circulation space therein, two side housings of the drying housing 21 are respectively provided with a passage opening along an extending direction, a position of the passage opening corresponds to a position of the track unit 13 and a position of the loading unit 14, the passage opening penetrates through the drying housing 21, and a drying station 22 is formed between the two passage openings. It should supplement that, stoving casing 21 adopts the heated board concatenation to form, and the heated board can be for the foaming board, cystosepiment, the embedded sponge of fixed plate, material such as muddy earth is formed, or by one or more combination uses of the aforesaid.

The drying shell 21 is also internally provided with a fan unit 23, a dehumidification unit 24 and a drying inner unit 25, and along the air outlet direction of the fan unit 23, the air outlet of the fan unit 23, the drying station 22, the drying inner unit 25 and the air inlet of the fan unit 23 are sequentially arranged to form a circulation channel; the dehumidifying unit 24 is disposed between the drying station 22 and the drying internal unit 25, is independent of the circulation channel, and is used for extracting moisture evaporated from the material from the circulation channel and supplying dry air into the circulation channel. The drying inner unit 25 is connected with a drying outer unit 26, the drying outer unit 26 is arranged outside the drying shell 21, and the drying unit formed by the drying inner unit 25 and the drying outer unit 26 can be a device capable of continuously supplying heat to the drying device 20, such as an air source heat pump unit, a coal-fired furnace and the like.

In the present embodiment, the dehumidifying unit 24 is equivalently connected in parallel to one side of the above-mentioned circulating air channel, after passing through the drying station 22, a part of the air is directly discharged out of the drying device 20 through the dehumidifying unit 24, another part of the air directly flows into the drying internal unit 25, and the fresh air dried by the dehumidifying unit 24 introduced from outside the drying device 20 is mixed with the air flowing into the drying internal unit 25. More specifically, the inlet of the dehumidification channel of the dehumidification unit 24 is in butt joint with the drying station 22 to directly discharge moisture, the outlet of the fresh air drying channel of the dehumidification unit 24 is in butt joint with the drying internal unit 25 to directly introduce dried air into the drying shell 21.

As shown in fig. 1 and fig. 3, in any two adjacent drying devices 20, the fan unit 23 of one drying device 20 is disposed at a first side of the drying station 22, and the fan unit 23 of the other drying device 20 is disposed at a second side of the drying station 22.

For example, when 2N (N ═ 1, 2 … …) drying devices 20 are arranged in the extending direction, the drying inner unit 25, the drying outer unit 26, and the fan unit 23 in the odd-numbered drying devices 20 may be arranged on the left side of the drying station 22; the drying inner unit 25, the drying outer unit 26 and the fan unit 23 in the even-numbered drying devices 20 are arranged at the right side of the drying station 22. The above-mentioned setting makes the material heating more even, avoids appearing the half-dry half wet condition of material.

Further, a partition plate 27 is arranged in the drying shell 21, and the partition plate 27 seals a gap between the drying inner unit 25 and an air inlet of the fan unit 23; a negative pressure region 271 is formed between the drying inner unit 25 and the air inlet of the fan unit 23 in the circulation passage.

In the circulation passage, a positive pressure region 272 is formed between the air outlet of the fan unit 23 and the drying inner unit 25.

In one specific embodiment, as shown in fig. 3, in the negative pressure zone 271, the drying internal unit 25 is disposed opposite to the fan unit 23; the partition plate 27 comprises a fan mounting plate 273, the fan unit 23 is mounted on the fan mounting plate 273, and an extension part is convexly arranged on one side of the fan mounting plate 273 and extends along the direction close to the drying station 22 so as to extend the length of the positive pressure region 272 and the length of the return air channel; an inner machine mounting plate 274 is convexly arranged on the other side of the fan mounting plate 273, and the drying inner machine unit 25 is mounted on the inner machine mounting plate 274. At this time, the sectional area of the positive pressure region 272 is large, i.e., the length of the return air passage is secured.

In another embodiment, as shown in fig. 4 and 5, the drying inner unit 25 is disposed at the top of the fan unit 23 in the negative pressure zone 271. Wherein the inner machine mounting plate 274 in fig. 4 is parallel to the extension portion, expanding the negative pressure region 271; the drying inner machine unit 25 in fig. 5 is arranged at one side of the extension part far away from the drying station 22, and the inner machine mounting plate 274 is correspondingly arranged at the position of the drying inner machine unit 25; the arrangement mode of the inner drying unit 25 enables the space of the negative pressure zone 271 to be larger, the width of the drying equipment 20 to be adjustable and selectable, and the compatibility is better, meanwhile, the inner drying unit 25 is far away from the fan unit 23, so that the wind field passing through the inner drying unit 25 is more uniform, and the heat exchange effect is better; it should be added that the dryer inner unit 25 can also be arranged in the positive pressure region 272, i.e. in the return air duct.

Further, as shown in fig. 6 and 7, the dehumidifying unit 24 includes a dehumidifying channel and a fresh air drying channel.

The dehumidification channel is communicated with the circulation channel and the external environment and is used for discharging the humid gas from the circulation channel; the fresh air drying channel is communicated with the external environment and the circulating channel and is used for introducing drying gas into the circulating channel.

Wherein, the dehumidification exit of dehumidification passageway is provided with dehumidification fan 241, and the dry entrance of new trend of dry passageway is provided with blast gate 242.

Furthermore, drying portion 244 is also arranged in drying housing 21, drying portion 244 is arranged at the entrance of the fresh air drying channel, and drying portion 244 is composed of a drying agent or a dehumidifier and is used for dehumidifying fresh air, so that the drying device is widely applicable to occasions with high environmental humidity such as south plum rain weather.

Further, still including total-effect heat exchanger 243, this total-effect heat exchanger 243 is passed respectively to dehumidification passageway and new trend drying channel, and dehumidification passageway and the indirect contact of new trend drying channel, and total-effect heat exchanger 243 plays the heat recovery effect this moment, can follow and retrieve heat to the new trend drying channel in the dehumidification passageway, guarantees that the new trend temperature that gets into in the stoving casing 21 can not hang down excessively.

In another specific embodiment, the dehumidification unit 24 includes only two air valves 242, wherein one air valve 242 is a fresh air valve disposed between the negative pressure region 271 and the external environment, and the other air valve 242 is a dehumidification air valve disposed between the positive pressure region 272 and the external environment. When the dehumidification is needed, the dehumidification air valve and the fresh air valve are opened simultaneously, the dehumidification air valve is in positive pressure relative to the atmospheric environment due to the effect of the fan unit 23, so that humid air in the drying shell 21 is discharged, the negative pressure area 271 is in negative pressure relative to the atmospheric environment, and external air enters the negative pressure area 271 from the fresh air valve. The structure is simple and reliable, and the cost is reduced.

Example two

The present embodiment describes a control method of the above-mentioned drying line. It should be added that a monitoring sensor 281 for detecting whether the loading unit 14 exists, a temperature and humidity sensor 282 for detecting temperature and humidity, and a main control unit 283 are further disposed in the drying casing 21. The monitoring sensor 281 is configured to detect whether a material to be dried is in the drying device 20, and the detection medium may be a metal bracket of the material carrying vehicle or a material on the material carrying vehicle. Temperature and humidity sensor 282 may be configured to monitor a wet-bulb temperature of a dry bulb in drying apparatus 20, and main control unit 283 may calculate humidity in real time according to the wet-bulb temperature of the dry bulb.

The main control unit 283 is electrically connected to the dehumidification unit 24, the temperature and humidity sensor 282, and the monitoring sensor 281, respectively. More specifically, the main control unit 283 is electrically connected to the dehumidifying fan 241 and the air valve 242, wherein the dehumidifying fan 241 adopts a variable speed or constant speed fan, and the main control unit 283 can adjust the rotating speed of the dehumidifying fan 241 and the opening and closing angle of the air valve 242 according to the dehumidifying requirement.

A control method specifically comprises the following steps:

s100, when a loading unit 14 is arranged in the drying equipment 20, the temperature in the drying equipment 20 is increased to a preset dry-bulb temperature; specifically, when the monitoring sensor 281 detects that the loading unit 14 is arranged in the drying casing 21, the temperature in the drying casing 21 is increased to the preset dry-bulb temperature through the drying internal unit 25;

s200, dehumidifying the air flow in the drying equipment 20; specifically, the main control unit 283 dehumidifies the air flow inside the drying casing 21 by the dehumidification unit 24;

s300, acquiring a humidity value in a shell in the drying equipment 20; specifically, the main control unit 283 obtains the value through the temperature and humidity sensor 282;

s400, judging whether the humidity value in the shell is smaller than or equal to a preset humidity threshold value or not;

s500, if not, returning to execute the step S200: dehumidifying the air flow within the drying apparatus 20;

s600, if so, not dehumidifying the air flow in the drying equipment 20;

s700, when the duration of baking the materials reaches a preset total drying time value, the loading unit 14 is moved to the next drying device 20 through the driving assembly 15.

For example, when the monitoring sensor 281 detects that there is material in the drying casing 21, the drying internal unit 25 and the drying external unit 26 are turned on to start heating the drying casing 21, so as to raise the temperature of the drying casing to a preset dry bulb temperature Tdbt (optionally, 60 ℃), and keep the temperature until the section of baking is completed. The humidity in the drying housing 21 containing the material is RH (initial drying device 20 humidity, measured, for example 66%), a preset humidity threshold is set to RH1 (which may be set, for example 50%), when RH > RH1, the dehumidifying fan 241 of the dehumidifying unit 24 is controlled to be turned on to forcibly exhaust moisture, when RH < ═ RH1, the dehumidifying fan 241 is turned off, when a set total drying time value (which may be set, for example 4h) is reached, under the action of the driving assembly 15, the material moves forward, enters the next drying device 20, is baked to a humidity of RH2 (which may be set, for example 45%), and so on, until the set humidity of the last drying device 20 is the target humidity RHn (different material humidities, for example, the target eucalyptus humidity is 20-25%), and the drying of the production material is completed.

Further, the loading unit 14 includes a plurality of loading vehicles, and the drying device 20 further includes a material humidity sensor, where the material humidity sensor is used to obtain loading humidity of the loading vehicles; it should be understood that the material humidity sensor of the present embodiment may be a manual measurement tool configured to select one of the time control dehumidification (S203) and the humidity control dehumidification (S202) in the following steps through humidity comparison after manually measuring the humidity of the material before entering the curing barn.

Step S100: when detecting that the loading unit 14 is arranged in the drying device 20, the method increases the temperature in the drying device 20 to a preset dry-bulb temperature, and includes:

s010, acquiring the loading humidity values of the loading vehicles, wherein the loading humidity values comprise a loading humidity maximum value and a loading humidity minimum value, and acquiring a loading humidity difference value according to the difference between the loading humidity maximum value and the loading humidity minimum value;

s020, presetting a starting time value n, a starting duration value t and a total drying time value S of the dehumidifying fan 241 of the drying equipment 20 in each hour;

step S200: dehumidifying the air flow in the drying device 20, which specifically includes:

s201, judging whether the loading humidity difference value is larger than or equal to a preset loading humidity difference threshold value or not;

s202, if so, continuously starting the dehumidifying fan 241 until the humidity value in the shell is smaller than or equal to the humidity threshold value;

and S203, if not, starting the dehumidifying fan 241 at intervals according to the starting times value n and the starting duration value t per hour in the total drying time value S.

It should be noted that, S202 and S203 are two control manners, and S202 is humidity control, which only needs to control the humidity inside the current drying casing 21 to reach a humidity threshold, for example, when the current humidity passes through the first drying device 20, the humidity is drained until RH < ═ RH 1. It should be understood that, when the humidity of the material is greatly different, the water yield of the material is different because the humidity is greatly different among the materials, the required baking time is increased, the humidity of the drying equipment 20 with the humidity control dehumidification function in a large degree is selected, and the dehumidification of the materials can be completed.

The second one is time control, that is, within the total drying time value S, the interval of turning on of the dehumidifying fan 241 is controlled based on the number n of starting times per hour and the starting duration value t of the dehumidifying fan 241. For example, within 1h, starting is required for 30 times, the duration time of each time is 1min, then within the heating time S (3h), starting is required for 90 times, the duration time of each starting is 1min, and each starting time is 1min, the dehumidifying fan 241 needs to be closed for 1min, and different starting times n and starting duration values t per hour are selected for different baking materials or different drying humidities; wherein, when the humidity difference of material is less than the difference threshold value of the preset material that carries humidity, because the humidity difference is little between its materials, the moisture content of each material is relatively even, under same temperature, the time that the less material moisture of humidity difference comes out is longer, consequently, the moisture increases more slowly in the casing of drying 21, indirectly open dehumidification fan 241, be favorable to moisture in the material fully to spread to the inside air of casing of drying 21, avoid the humidity of inside air not yet saturated just the condition emergence of being discharged, thereby thermal loss has been reduced, the resource has been saved.

In summary, the drying production line and the control method thereof provided by the embodiment have the advantages of being simple to control, not prone to causing the material to be stuffy, high in production efficiency, good in sealing performance, high in stability, high in energy utilization rate and strong in expansibility.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.