KR101147396B1 - Hot air drier - Google Patents

Abstract

PURPOSE: A hot air drier is provided to pre-heat air inflowing from outside for drying agricultural products using the heat exchange with waste heat instead of directly inserting into a drying chamber. CONSTITUTION: A hot air drier comprises the following: front/back partition walls(4,6) installed on a long housing(2) for forming front and back air inducing spaces(8) and a drying chamber(10); plural conveyors(14) formed with net belts(12) and installed in the drying chamber for transferring products to be dried inserted into an inlet(20) to an outlet(22); plural heater rods(18) located among the net belts of each conveyor; fans(26) connected to a driver motor(24), and axially installed on the bottom opening of the partition walls; and a heat exchanger(30) installed in a mounted conduit(32).

Description

Hot air dryer {HOT AIR DRIER}

The present invention relates to a drying apparatus, and more particularly, to an improvement of a hot air dryer for drying a drying object such as agricultural and marine products with hot air.

In general, the agricultural and marine products are stored for a long time or dried in order to prevent any deterioration during distribution. For example, grains such as rice and barley harvested from the mountain region are essential for storage and transportation until reaching the consumer. This is because grains such as rice and barley harvested from the mountain region have too much moisture to be stored and transported without damage. As another example, in order to obtain a radish dried radish it is necessary to chop and dry the radish.

Conventional dryers for drying dry objects such as agricultural and aquatic products are provided with a burner and a blower having a heat exchanger in a heating chamber connected to the drying chamber, and the external cold air introduced into the air inlet by the blowing operation of the blower is heated and passes through the drying chamber. The waste heat passing through the drying chamber is exhausted to the exhaust pipe.

However, such a dryer is difficult to optimize the drying efficiency because the air in the drying room contains a lot of moisture, and waste heat passing through the drying room is immediately discarded, so energy efficiency is not maximized. Therefore, if the dryer can be implemented in order to optimize the drying efficiency and maximize the energy efficiency in drying a drying object such as agricultural and aquatic products, many consumers will be able to obtain a response.

Accordingly, an object of the present invention is to provide a hot air drier for optimizing drying efficiency and maximizing energy efficiency in drying a drying object such as agricultural and marine products.

In accordance with the above object, in the hot air dryer, the front and rear partitions 4 and 6 which are open in the long housing 2 are respectively installed in the long-length housing 2, and the air induction spaces 8 and the front and rear partitions 4 before and after are respectively provided. The drying chamber 10 is formed between the six chambers, and a plurality of conveyors 14 made of man belts 12 are formed in a multi-layered structure in the drying chamber 10 so that the object to be fed into the inlet 20 is transferred to the conveyors 14. Passed in order to be discharged to the outlet 22, a plurality of heater rods 18 are arranged between the manbelt 12 of each conveyor 14, the partition wall 4 in the front and rear air induction space 8 6, a plurality of fans (26) connected to the drive motor 24 in a row in the lower opening portion, the heat exchanger (30) in the mounting conduit 32 formed in the left and right longitudinal direction on the ceiling of the drying chamber (10). The heat exchanger 30 is a heat conduction plate is corrugated and repeated in the cross-sectional shape of the acid and bone cross-section and extending in the longitudinal direction of the conduit The upper open valley 34 and the lower open valley 36 are configured to be alternately formed, and the external air inlet opening 38 and the internal air outlet opening 40 are formed in the upper and lower portions of the center of the mounting conduit 32 and the mounting conduit ( The communication opening 42 is formed on the upper and left ends of the left and right sides of the 32, and the waste air outlet 44 is formed on the left and right side walls of the housing which meet the mounting conduits 32, and the communication openings 42 on the left and right sides of the mounting conduits 32 are formed. It is characterized by forming a communication conduit 46 between the front and rear air induction space (8).

In the present invention, in drying drying objects such as agricultural and aquatic products, the air introduced from the outside is not directly put into the drying chamber, but is preheated by heat exchange using waste heat, put into the drying chamber, the hot air is evenly sent in the drying chamber, and the drying object being transferred is easily transferred. By configuring to dry, there is an advantage that the drying efficiency can be optimized and the energy efficiency can be maximized.

1 is a schematic diagram of a hot air dryer according to an embodiment of the present invention;
2a and 2b is a front sectional view showing an operating state of the hot air dryer of Figure 1,
3 is a plan view of FIG.
4 is a side cross-sectional view of FIG.
5 is a view related to the heat exchanger of the present invention,
Figure 6 is a cross-sectional view for showing the state of the inlet air passing through the communication conduit after heat exchange in the heat exchanger,
7 is a perspective view of main parts of a heat exchanger;

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic view of a hot air dryer according to an embodiment of the present invention, Figures 2a and 2b is a front sectional view showing an operating state of the hot air dryer of Figure 1, Figure 3 is a plan view of FIG. 4 is a side cross-sectional view of FIG. 1.

Hot air dryer of the present invention will be described as a preferred embodiment to implement a large size of the left and right length is several ten meters and the height or width of the front and rear several meters to dry the object to be dried, preferably agricultural and marine products.

In the present invention, in drying the object to be dried, such as agricultural and aquatic products, the air introduced from the outside is not directly put into the drying chamber, but is preheated by heat exchange using waste heat, and has a structure in which the drying chamber is introduced. In addition, it has a configuration to send the hot air evenly in the drying chamber and to easily dry the drying object being transported.

The housing 2 constituting the hot air dryer may be, for example, a long-sized housing having a length of 10 to 30 meters, a front to back width of 3 to 5 meters, and a height of 4 to 6 meters. The front and rear partition walls 4 and 6 which are opened in the lower side are respectively provided.

As the front and rear partitions 4 and 6 are opened in the housing 2, respectively, the front and rear air induction spaces 8 are formed in the housing 2, and between the front and rear partitions 4 and 6, respectively. In the drying chamber 10 is formed.

The front and rear air induction space 8 is a space for allowing the inflow air preheated by heat exchange with the waste heat to be led to the drying chamber 10 through the lower opening of the front and rear partitions 4 and 6, A plurality of fans 26 are arranged in a row at the lower openings of the partitions 4 and 6 in the space 8 to blow inflow air that has been preheated into the drying chamber 10.

It is preferable that the plurality of fans 26 are formed in a multi-wing fan (called 'sirocco fan' in the industry) structure, and the plurality of fans 26 are axially connected to one shaft 25 and the shafts thereof. 25 is configured to be axially rotated by being connected to a large capacity drive motor 24 installed outside of the housing 2. In addition, the shaft 25 between the plurality of fans 26 is mandrel installed in the bearing portion 28 having a PEEK (Poly ether ether ketone) bushing. The PEEK bushing is a resin bushing with good self-lubrication and durability.

In the present invention, the front and rear partitions 4 and 6 having lower openings and the respective air induction spaces 8 before and after are formed to have a long length and follow the lower openings of the front and rear partitions 4 and 6 at the bottom thereof. Although the drying chamber 10 having a long and wide space is formed by arranging a plurality of fans 26 having a multi-role structure in a line, the inflow air is distributed evenly without being biased into one place.

The drying chamber 10 of the present invention disposed between the front and rear partition walls 4 and 6 is provided with facilities for drying a drying object.

In more detail, in the drying chamber 10, a plurality of conveyors 14 made of man belts 12 are formed in a multi-layered structure, but a drying object is introduced into the inlet 20 formed on the upper side wall of the housing 2. Conveyors 14 are configured to be discharged to the outlet 22 formed under the other side wall of the housing 2 while passing in a zigzag. Each conveyor 14 formed on the top and bottom layers is configured to protrude to the outside of the inlet 20 and the outlet 22 to allow the operator to input the drying target and to transfer the drying finished elsewhere.

The conveyor 14 below the lower layer forms an upstream portion which projects more laterally than the downstream portion of the upper conveyor 14 in order to receive the object to be dropped immediately after the upper conveyor 14 drops.

Between the belt belt 12 of each conveyor 14 according to an embodiment of the present invention is arranged so that a plurality of heater rods 18 are arranged with a predetermined interval in the longitudinal direction, and the upper net on which the drying object is placed The support rolls 16 supporting the belt 12 are also arranged to be spaced apart in the longitudinal direction. The heater rods 18 and the support rolls 16 are fastened and fixed to a bracket (not shown) fixed between the shafts of the driving roller and driven roller of the conveyor 14.

The mans belt 12 employed according to the embodiment of the present invention is formed of one of Teflon resin coated glass fiber and carbon fiber, and thus has excellent heat resistance and durability, and both edges of the mans belt 12 are fabric fibers. By sewing the band woven into the mesh belt 12 is configured not to stretch.

Heater rod 18 may be composed of a carbon heating element, etc., may be provided in the form that is attached to the automatic regulator that can generate heat as much as heat loss.

The ceiling of the drying chamber 10 configured as described above forms a mounting conduit 32 extending in the longitudinal direction from the center position. In addition, the upper and lower portions of the center of the mounting conduit 32 correspond to the external air inlet opening 38 and the internal air exhaust opening 40, and the left and right side walls of the housing 2 which meet the mounting conduit 32 correspond to the waste air outlet ( 44). In addition, in the mounting conduit 32, communication openings 42 are formed on the upper and left ends of the mounting conduits 32, and the communication openings 42 on the left and right are respectively partitioned through the communication conduits 46 formed by extending back and forth. It is comprised so that it may communicate with the front-back air induction space part 8 formed by (4) (6).

Inside the mounting conduit 32 of the mounting conduit 32 and the communication conduit 46 as described above is provided with a heat exchanger 30 having a structure as shown in Figs.

5 is a view related to the heat exchanger 30 of the present invention, Figure 6 is a plan sectional view showing the state of the inlet air passing through the communication conduit 46 after heat exchange in the heat exchanger (30), Figure 7 is Main part perspective view of a heat exchanger.

Heat exchanger 30 according to an embodiment of the present invention as shown in Figure 5 (B) or Figure 7 is a heat conduction plate is corrugated to repeat the cross-sectional shape of the acid and bone and can be seen in Figure 5 (A) or Figure 6 As it extends in the longitudinal direction of the mounting conduit 32, the upper open valley 34 and the lower open valley 36 is a configuration formed alternately. In addition, the upper open valleys 34 and the lower open valleys 36 of the heat exchanger 30 are within a range of 10 to 20 ° so that the inlet air or the waste air wind is long enough to allow the long specific surface area to pass through the bone. Construct zigzag at.

Among the upper open valleys 34 and the lower open valleys 36 of the heat exchanger 30 as described above, as the upper open valleys 34, new inflow air from the outside air is introduced into the outside of the center of the mounting conduit 32. 38) enters the goal and passes to the left and right side, the exhaust air exiting the drying chamber 10 to the lower open bone 36 adjacent to the upper open bone 34, the bet exhaust opening in the lower center of the mounting conduit 32 It enters (40) and rides the goal to the left and right.

The new inlet air in the outside air is relatively low temperature drying compared to the waste air discharged from the drying chamber 10, and the waste air discharged from the drying chamber 10 is hot and humid compared to the inlet air of the outside air. Therefore, the outside air inflow air and the internal waste air flowing through the upper open valley part 34 and the lower open valley part 36 are heat-exchanged through the heat exchanger 30, and the inlet air is warmed more warmly, and the waste air cools while losing heat. Dew can also occur with luggage.

First, referring to FIG. 2A, new inflow air from outside air enters the outside air inlet opening 38 above the center of the mounting conduit 32 and rides through the upper open valley 34 of the heat exchanger 30 from the center side to both sides. In addition, the heat is heated through heat exchange, and the preheated inflow air passes through the communication conduit 46 through the communication opening 42 of the upper and left end portions of the left and right both ends of the mounting conduit 32. After passing through the communication conduit 46 is introduced and diffused into the front and rear air induction space (8).

In the front and rear air induction space 8, there are fans 26 having a multi-role structure which are collectively driven by the drive motor 24, and the inlet air preheated by the blowing action of the fans 26 is a drying chamber 10. It flows into the interior, but it flows evenly into the large interior space.

As shown in FIG. 2B, the preheating inflow air blown into the drying chamber 10 is further warmed and heated by the heat generated from the heater rods 18 installed between the man belts 12 of the conveyor 14. In this process, the drying object loaded on the conveyor 14 in the drying chamber 10 gradually dries.

Each conveyor 14 is preferably slowed down at a speed of 30 mm / min, for example, and the heater rod 18 generates heat under the control of a predetermined controller so that the internal temperature of the drying chamber 10 is kept constant. Therefore, the drying object introduced to the inlet 20 of the drying chamber 10 is completed when it is time to discharge the exit 22 of the drying chamber 10 by a plurality of conveyors (14).

The air in the drying chamber 10 is in a high temperature and high humidity state while drying the object to be dried, and the waste air that has risen to a high temperature and high humidity state is stored in the storage conduit 30 through the bet exhaust opening 40 located at the ceiling center of the drying chamber 10. Out of the heat exchanger 30, the lower open valley 36 is to be exited.

In the drying chamber 10, the humid air escapes and the dry air enters to maintain a good drying efficiency, and the hot and humid waste air exiting from the drying chamber 10 is betted at the center lower side of the mounting conduit 32. Lung formed in the left and right side walls of the housing 2 which enters the discharge opening 40 and cools through heat exchange while moving left and right in the lower opening valley 36 of the heat exchanger 30 and then meets the mounting conduit 32. It is discharged through the air outlet 44.

The hot air dryer of the present invention is to dry the drying targets, such as agricultural and aquatic products relatively quickly and dry and optimize the drying efficiency, thereby maximizing the energy efficiency.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. Therefore, the scope of the present invention should not be defined by the described embodiments, but should be defined by the claims and their equivalents.

The hot air dryer of the present invention can be used to dry a drying object such as agricultural and marine products.

(2)-Housing (2) (4) (6)-Front and rear bulkhead
(8)-Air induction space part (10)-Drying chamber
(12)-Mans belt (14)-Conveyor
(16)-Support Roll (18)-Heater Rod
(20)-Inlet (22)-Outlet
(24)-Drive motor (26)-Fan
(28)-bearings (30)-heat exchanger
(32)-Mounting conduit (34) (36)-Upper and lower open valleys
(38)-Inlet opening (40)-Outlet opening
(42)-Communication Opening (44)-Waste Air Outlet
(46)-Communication Conduit

Claims (4)

In the hot air dryer,
The front and rear partitions 4 and 6, which are opened at the lower side in the long housing 2, are respectively installed to form a drying chamber 10 between the front and rear air induction spaces 8 and the front and rear partitions 4 and 6, and the drying chamber ( 10, a plurality of conveyors 14 of the man belt 12 is formed in a multi-layer structure so that the drying object introduced to the inlet 20 passes through the conveyors 14 in order to be discharged to the outlet 22, and each A plurality of heater rods 18 are arranged between the belt belts 12 of the conveyor 14, and a driving motor 24 is provided at the lower opening of the partition walls 4 and 6 in the front and rear air induction spaces 8. A plurality of fans 26 connected to each other are installed in a row, and a heat exchanger 30 is installed in a mounting conduit 32 formed in a left and right longitudinal direction on the ceiling of the drying chamber 10, but the heat exchanger 30 has a heat conduction plate with a valley and a valley. The cross-sectional shape is repeatedly corrugated and extends in the longitudinal direction of the conduit so that the upper open valleys 34 and the lower open valleys 36 are alternately formed. It is configured to form an open air inlet opening 38 and the air outlet opening 40 in the upper and lower portions of the center of the mounting conduit 32, and forms a communication opening 42 on the upper and left ends of the mounting conduit 32 A waste air outlet 44 is formed on the left and right side walls of the housing that meet the conduit 32, and a communication conduit 46 is formed between the communication openings 42 on the left and right sides of the mounting conduit 32 and the front and rear air induction spaces 8, respectively. Hot air dryer, characterized in that the configuration.
The fan 26 is a multi-fan structure, wherein the axially connected shafts 25 aligned with the fans 26 are mandrel on the bearing 28 having a PEEK (Poly ether ether ketone) bushing. Hot air dryer, characterized in that configured to be installed.
The hot air dryer according to claim 1 or 2, wherein the man belt (12) is made of one of Teflon resin coated glass fibers and carbon fibers.
The hot air dryer according to claim 1 or 2, characterized in that the support rolls (16) supporting the manbelt (12) of the conveyor (14) are arranged on each conveyor (14).

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