CN211854800U

CN211854800U - Multi-section hot air full recycling drying line

Info

Publication number: CN211854800U
Application number: CN202020364905.8U
Authority: CN
Inventors: 张培森
Original assignee: Shandong Reihai Automation Technology Co ltd
Current assignee: Shandong Reihai Automation Technology Co ltd
Priority date: 2020-03-21
Filing date: 2020-03-21
Publication date: 2020-11-03
Anticipated expiration: 2030-03-21

Abstract

The utility model discloses a hot-blast complete recycle stoving line of multistage formula, including the quantity be n and can carry out the drying-machine of drying operation to food material alone, every drying-machine includes an air intake and hydrofuge mouth, divide into 1 st drying-machine, 2 nd drying-machine, … n-1 st drying-machine and nth drying-machine according to the order of carrying out the transport and drying in proper order to food material by the front end to the back end, food material passes through the transport mechanism and carries to the nth drying-machine and continues to dry after drying for a period in nth drying-machine; a dehumidifying device which can reduce the water content of the damp and hot air discharged by the nth dryer and then send the damp and hot air into the nth-1 dryer for continuous drying operation is arranged between the dryers between the two adjacent processes. The utility model discloses simple structure, convenient to use can improve hot-blast utilization ratio to reduce the energy consumption, reduce the stoving cost, and can improve drying efficiency and stoving effect.

Description

Multi-section hot air full recycling drying line

Technical Field

The utility model relates to a hot-blast complete recycle stoving line of multistage formula.

Background

At present, in the food processing industry, in order to dry food, a set of dryers, such as a mesh belt dryer or a box-type drying box, is generally used to dry food materials; the drying modes and the structure types of the mesh-belt type dryer are various, but the mesh-belt type dryer mainly utilizes a rotatable metal mesh belt, the mesh belt bears materials, the materials enter from a feed inlet at one end of the mesh-belt type dryer and are discharged from a discharge outlet at the other end, and meanwhile, hot air for drying the materials on the mesh belt is arranged in an inner cavity of the mesh-belt type dryer, so that the drying purpose is achieved, but the hot air of the mesh-belt type dryer needs to be discharged into the atmosphere from a moisture discharge outlet of the mesh-belt type dryer after reaching the corresponding humidity, so that the waste of the hot air is caused, and the utilization rate of the hot air is reduced; secondly, the structure and the theory of operation of box formula stoving case also divide into a lot of, under the general condition, box formula stoving case seals the material in the box inner chamber, later with the internal blowing of wind body heating, thereby dry the material, after the stoving, open the box door, transport the material, thereby reach the material stoving purpose, however, box formula stoving case is in the stoving process, hot-blast in the box reaches corresponding humidity after, also can discharge through the discharge mode of regularly discharging or lasting discharge mode, after the hot-blast discharge, can't reuse, consequently, hot-blast utilization ratio has been reduced, and improved the energy consumption, simultaneously, drying cost has been improved.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a simple structure, convenient to use can improve hot-blast utilization ratio to reduce the energy consumption, reduce the stoving cost, and can improve the hot-blast whole recycle stoving line of multistage formula of drying efficiency.

In order to solve the technical problem, the utility model discloses a quantity is n and can carry out the drying-machine of drying operation to food material alone, and every drying-machine includes that one can carry out exhaust hydrofuge mouth to the air intake of air input in the drying-machine and the air that can be with the humidity in the drying-machine overhigh, and its structural feature is: dividing n dryers into a 1 st dryer, a 2 nd dryer, an (n-1) th dryer and an nth dryer according to the sequence of conveying and sequentially drying food materials from a former process to a latter process, wherein the food materials are dried in the (n-1) th dryer for a period of time and then conveyed to the nth dryer through a transfer mechanism for continuous drying; a dehumidifying device which can reduce the water content of the damp and hot air discharged by the nth dryer and then send the damp and hot air into the nth-1 dryer for continuous drying operation is arranged between the dryers between the two adjacent processes.

After the structure is adopted, the plurality of dryers are connected in series for synchronous use, meanwhile, food materials are input from the dryer at the forefront side, sequentially pass through the plurality of dryers from front to back, and finally are discharged from the dryer at the rearmost side, so that the drying purpose is achieved, and secondly, the materials are dried uninterruptedly at one time, so that the drying efficiency and the drying effect can be improved; in addition, hot air for drying the materials is input from the dryer at the last side, sequentially passes through the dryers in the middle and is finally discharged from the dryer at the foremost side, and then the recycling rate of the hot air is improved, so that the energy consumption is reduced, the energy is saved, and the drying efficiency can be improved; secondly, a dehumidifying device is arranged between the dryers between the two adjacent processes, so that the hot air in the dryer at the last side can be discharged into the dehumidifying device after the materials are heated, the dehumidifying device reduces the water content in the hot air and then sends the hot air into the dryer adjacent to the front side, and the dryer at the front side directly heats the newly input hot air again, so that the materials in the dryers are dried, and the operation is repeated until the hot air is discharged from the dryer at the foremost side; the dehumidifying device is used for avoiding the influence on the drying effect after the hot air with overhigh humidity enters the dryer again.

In order to realize the dehumidifying device, the dehumidifying device comprises a closed dehumidifying box body, a dehumidifying opening of the nth dryer and an air inlet of the nth-1 dryer are communicated with an inner cavity of the dehumidifying box body respectively, a condensate water outlet and a drain valve for controlling the condensate water outlet to open and close are arranged at the bottom of the dehumidifying box body, a heat exchange tube is arranged in the dehumidifying box body, two ends of the heat exchange tube extend out of the dehumidifying box body respectively, one end of the heat exchange tube is communicated with the air inlet of the nth-1 dryer, and the other end of the heat exchange tube is communicated with the outside air.

Every time hot air passes through a drying-machine, the water content of hot air all can crescent, consequently, for the amount of wind crescent that gets into the front side dehumidification box to further improve dehumidification effect, the amount of wind that gets into heat exchange tube in the front side dehydrating unit is greater than the amount of wind that gets into heat exchange tube in the rear side dehydrating unit.

In order to ensure the heat insulation performance of the dehumidification box body, the box wall of the dehumidification box body is a wall body made of heat insulation materials.

In order to increase the contact area of hot air in the heat exchange tube and the dehumidification box body and further improve the condensation effect, the heat exchange tube body in the dehumidification box body is arranged in a winding manner or in a spiral winding manner.

The dryer is a mesh belt dryer or a box type drying box.

The transfer mechanism is a lifting machine.

To sum up, the utility model discloses simple structure, convenient to use can improve hot-blast utilization ratio to reduce the energy consumption, reduce the stoving cost, and can improve drying efficiency and stoving effect.

Drawings

The invention will be described in further detail with reference to the following drawings and embodiments:

FIG. 1 is a schematic structural view of the present invention including two dryers;

fig. 2 is a schematic structural view of the present invention when it includes three dryers.

Detailed Description

For the convenience of describing the mechanism of the present invention, the right side of fig. 1 is defined as the front of the present invention, and the left side of fig. 1 is defined as the rear of the present invention.

Referring to the attached drawings, the multi-stage hot air all recycling drying line includes n dryers capable of independently drying food materials, the dryers are any dryers capable of realizing drying operation in the prior art, meanwhile, each dryer should include an air inlet 1 capable of inputting air into the dryer and a moisture exhaust port 2 capable of exhausting air with too high humidity in the dryer, and secondly, the dryer can be a mesh belt dryer or a box type drying box, for example, the dryer can adopt the dryer structure in the chinese utility model patent with application No. 201920145611.3 or application No. 201820054206.6, the dryer in fig. 1 and fig. 2 of the present invention is only an embodiment for describing the working principle of the present invention, as shown in fig. 1, the dryer includes a rectangular drying box and a metal hollowed mesh belt 9 capable of feeding materials into the drying box, the inner cavity of the drying box body is divided into a plurality of drying chambers which are arranged at intervals in the front and back direction through vertical partition plates, the number of the drying chambers is set according to actual requirements without quantity limitation, secondly, the top of the drying chamber at the last side is provided with an air inlet 1, the top of the drying chamber at the foremost side is provided with a moisture exhaust port 2, the top and the bottom of the drying box body are respectively provided with a plurality of blast heating mechanisms 11 which are arranged at intervals in the front and back direction, each blast heating mechanism 11 comprises a blast blower and a heating pipe, so that air in the drying chamber at the back side can be sucked into the drying chamber at the front side and can be reheated, in addition, the drying chambers are sequentially divided into an odd-number drying chamber 10 and an even-number drying chamber 12 according to the sequence of the drying chambers from the back to the front side, the heating mechanism 11 at the lower side of the blast blower is arranged between the, an air suction opening of the lower blowing heating mechanism 11 is communicated with the bottom of the odd-numbered drying chamber 10, and an air exhaust opening is communicated with the bottom of the even-numbered drying chamber 12; the upper blowing and heating mechanism 11 is respectively arranged between the two drying chambers of which the rear side is an even-numbered drying chamber 12 and the front side is an odd-numbered drying chamber 10, and meanwhile, an air suction opening of the upper blowing and heating mechanism 11 is communicated with the top of the even-numbered drying chamber 12 and an air exhaust opening is communicated with the top of the odd-numbered drying chamber 10; therefore, the circulating relay action of the blast heating mechanisms 11 arranged up and down can heat the hot air in the drying chamber on the last side, then sequentially pass through the drying chambers on the front side, and finally be sucked into the drying chamber on the foremost side, and finally the hot air is discharged from the moisture discharging port 2 on the front side; in addition, the front end of the drying box body is provided with a feed inlet for the mesh belt 9 to enter, the rear end of the drying box body is provided with a discharge outlet for the mesh belt 9 to output, an avoiding opening for avoiding the mesh belt 9 is arranged on the partition plate, and a supporting roller for supporting the mesh belt 9 to rotate and a driving motor for driving the mesh belt 9 to rotate are arranged on the outer side of the drying box body, so that materials are put on the mesh belt 9 at the feed inlet and then are slowly conveyed into the drying chamber through the mesh belt 9, and the materials are finally discharged from the discharge outlet at the rear side along with the mesh belt 9 after.

However, in order to improve the drying efficiency and the hot air utilization ratio, the plurality of dryers are connected in series for use, for example, n dryers are divided into the 1 st dryer, the 2 nd dryer, the (n-1) th dryer and the nth dryer according to the sequence of conveying and sequentially drying food materials from the front process to the rear process, and the food materials are conveyed to the nth dryer through the transfer mechanism 3 after being dried in the nth dryer for a period of time to be continuously dried; and a dehumidifying device which can reduce the water content of the damp and hot air discharged by the nth dryer and then send the damp and hot air into the nth-1 dryer to continue drying operation is arranged between the dryers between the two adjacent processes. As shown in fig. 1, the two dryers are divided into a 1 st dryer 13 and a 2 nd dryer 14 in the order of conveying and sequentially drying food materials from a front process to a rear process, and of course, the number of the dryers may be three or more; in addition, the transferring mechanism 3 is a chain plate type lifter or a belt conveyor in order to send the material discharged from the 1 st dryer 13 to the 2 nd dryer 14 again for drying.

In addition, in order to realize the dehumidifying apparatus, the dehumidifying apparatus includes a closed dehumidifying case 4, the moisture discharging port 2 of the 2 nd dryer 14 is connected to the rear side portion of the dehumidifying case 4 through a pipe, and the air intake port 1 of the 1 st dryer 13 is connected to the front side portion of the dehumidifying case 4 through a pipe, so that the moisture discharging port 2 of the 2 nd dryer 14 and the air intake port 1 of the 1 st dryer 13 are respectively communicated with the inner cavity of the dehumidifying case 4 through pipes, and at the same time, the bottom of the dehumidifying case 4 is provided with a condensed water outlet 5 and a drain valve 6 for controlling the opening and closing of the condensed water outlet 5, so as to facilitate the concentrated discharge of condensed water, the bottom of the dehumidifying case 4 is a conical bottom with a low middle position and a high peripheral position, and the drain outlet is provided with the; secondly, a heat exchange tube 7 is arranged in the dehumidifying box 4, the heat exchange tube 7 is preferably a metal tube made of aluminum or copper, the thickness of the metal tube is set according to actual needs, two ends of the heat exchange tube 7 respectively extend out of the dehumidifying box 4, one end of the heat exchange tube 7 is communicated with the air inlet 1 of the 1 st dryer 13, the other end is communicated with the outside air, and the other end of the heat exchange tube 7 is communicated with the outside air so that the outside cold air can be naturally sucked into the heat exchange tube, therefore, after the hot air in the 2 nd dryer 14 enters the dehumidifying box 4, the hot air is contacted with the heat exchange tube 7 with lower temperature, condensed water is formed outside the heat exchange tube 7, after excessive condensed water drops to the bottom of the dehumidifying box 4, then, the drain valve 6 is opened in a timing mode, the condensed water can be discharged, and the dehumidified hot air enters the 1 st dryer 13 again, therefore, the drying operation is performed, and meanwhile, the air in the heat exchange pipe 7 is heated and then is sent into the 1 st dryer 13, so that the drying operation is performed, therefore, the consumption of hot air is reduced, and the recycling of the hot air is realized.

In addition, because the water content of the hot air is gradually increased when the hot air passes through one dryer, in order to gradually increase the amount of cold air entering the front side dehumidifying box body and further improve the dehumidifying effect, the air volume entering the heat exchange tubes in the front side dehumidifying device is larger than the air volume entering the heat exchange tubes in the rear side dehumidifying device, and in order to realize that the air volume entering the front side dehumidifying device is larger than the air volume entering the rear side dehumidifying device, the air discharge volume of the blower in the front side dryer can be larger than the air discharge volume of the blower in the rear side dryer, therefore, the air discharge volume of the front side dryer is large, the air discharge volume of the rear side adjacent dryer is small, an air volume difference is formed between the front and rear adjacent dryers, and in the actual drying operation, more air volume can be naturally pumped in the heat exchange tubes in the dehumidifying device between the two dryers so as to compensate the air volume difference, the air quantity entering the heat exchange tube in the front-side dehumidifying device is naturally larger than the air quantity entering the heat exchange tube in the rear-side dehumidifying device.

In addition, in order to ensure the heat preservation performance of the dehumidification box body 4, the outer side of the box wall of the dehumidification box body 4 can be coated with a heat preservation plate, so that the heat preservation effect can be improved; in addition, in order to increase the contact area between the heat exchange tube 7 and the hot air in the dehumidifying box 4 and thus improve the condensation effect, the tube body of the heat exchange tube 7 inside the dehumidifying box 4 is coiled in a circuitous or spiral manner.

In conclusion, a plurality of dryers are connected in series for synchronous use, meanwhile, food materials are input from the dryer at the forefront side, sequentially pass through the dryers from front to back, and finally are discharged from the dryer at the rearmost side, so that the drying purpose is achieved, and secondly, the materials are dried uninterruptedly at one time, so that the drying efficiency and the drying effect can be improved; in addition, hot air for drying the materials is input from the dryer at the last side, sequentially passes through the dryers in the middle and is finally discharged from the dryer at the foremost side, and then the recycling rate of the hot air is improved, so that the energy consumption is reduced, the energy is saved, and the drying efficiency can be improved; secondly, be provided with dehydrating unit between the drying-machine between two adjacent processes, consequently, hot-air in the drying-machine of rearmost side can discharge in dehydrating unit after having heated the material, dehydrating unit reduces the hot-air moisture content of high humidity and becomes dry hot-blast, simultaneously, cold air in the heat exchange pipe in the dehydrating unit also is heated up to hot-blast, two strands of hot-blast mixture of dehydrating unit output, send into the adjacent drying-machine of front side again, and the drying-machine of front side directly heats the hot-air of new input again, thereby dry the material in the drying-machine, reciprocate like this, until hot-air discharges from the drying-machine of foremost side.

To sum up, the present invention is not limited to the above-mentioned specific embodiments. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications are intended to be within the scope of the present invention.

Claims

1. The utility model provides a hot-blast complete recycle drying-line of multistage formula, is n and can carry out the drying-machine of drying operation to food material alone including quantity, and every drying-machine includes one can be to air intake (1) of drying-machine internal input air and can carry out exhaust hydrofuge mouth (2) with the air of drying-machine internal humidity height, its characterized in that: dividing n dryers into a 1 st dryer, a 2 nd dryer, an (n-1) th dryer and an nth dryer according to the sequence of conveying and sequentially drying food materials from a former process to a latter process, wherein the food materials are dried in the (n-1) th dryer for a period of time and then conveyed to the nth dryer through a transfer mechanism (3) for continuous drying; a dehumidifying device which can reduce the water content of the damp and hot air discharged by the nth dryer and then send the damp and hot air into the nth-1 dryer for continuous drying operation is arranged between the dryers between the two adjacent processes.

2. The multi-stage hot air full recycling drying line according to claim 1, characterized in that the dehumidifying device comprises a closed dehumidifying case (4), the dehumidifying port (2) of the nth dryer and the air inlet (1) of the nth-1 dryer are respectively communicated with the inner cavity of the dehumidifying case (4), the bottom of the dehumidifying case (4) is provided with a condensed water outlet (5) and a drain valve (6) for controlling the opening and closing of the condensed water outlet (5), a heat exchange tube (7) is arranged in the dehumidifying case (4), two ends of the heat exchange tube (7) respectively extend out of the dehumidifying case (4), one end of the heat exchange tube (7) is communicated with the air inlet (1) of the nth-1 dryer, and the other end is communicated with the outside air.

3. The multi-stage hot air recycling drying line according to claim 2, wherein the air flow entering the heat exchange tubes of the front-side dehumidifier is larger than the air flow entering the heat exchange tubes of the rear-side dehumidifier.

4. The multi-stage hot air recycling drying line according to claim 2, wherein the wall of the dehumidifying box (4) is a wall made of heat insulating material.

5. The multi-stage hot air recycling drying line according to claim 2, wherein the heat exchange tubes (7) inside the dehumidifying case (4) are coiled in a winding or spiral manner.

6. The multi-sectional type drying line for recycling all hot air according to claim 1, wherein the dryer is a mesh belt dryer or a box type drying box.

7. The multi-stage hot air recycling drying line according to claim 1, wherein the transfer mechanism (3) is a lifter.