KR20160132624A

KR20160132624A - Down-Steream Infrared Conveyer type Dryer

Info

Publication number: KR20160132624A
Application number: KR1020150065407A
Authority: KR
Inventors: 장태균
Original assignee: 장태균
Priority date: 2015-05-11
Filing date: 2015-05-11
Publication date: 2016-11-21

Abstract

The present invention relates to an apparatus for continuously drying a downward airflow type infrared conveyor, in which an inlet (11) through which a desiccant (g) to be dried is introduced and a discharge port (12) A mesh conveyor installed inside the main body 10 for sequentially conveying the drying material g from the inlet port 11 to the outlet port 12, (10), the air sucked from the lower part of the main body (10) is supplied again from the upper side of the main body (10) so that the air flow (w) A downstream air flow circulating and drying means 40 for continuously circulating and supplying the air to pass through the mesh conveyor 20 from the upper side to the lower side, a near infrared ray and far infrared ray heat Apparatus (100); (1), characterized in that the drying apparatus (1) comprises a drying unit

Description

(Down-Steream Infrared Conveyer type Dryer)

The present invention relates to an apparatus for continuously drying a downward airflow type infrared conveyor, in which an inlet (11) through which a desiccant (g) to be dried is introduced and a discharge port (12) A mesh conveyor 20 disposed inside the main body 10 for sequentially conveying the drying material g from the inlet 11 to the outlet 12; And an air supply unit installed in the main body and adapted to supply air sucked from a lower portion of the main body to the main body to supply the air to the drying material g, (40) for continuously circulating and supplying the air to the mesh conveyor (20) so as to pass from the upper side to the lower side, and a near-infrared and far-infrared heat generating device 100); (1), characterized in that the drying apparatus (1) comprises a drying unit

When drying fruits, vegetables, etc. in a drying device for biological industry, a large part of the organic components (color, fragrance component, chlorophyll, etc.) of the material is lost during drying due to exposure to heat for a long time.

For this reason, a drying method capable of drying in a short time without raising the temperature of the drying material is required as one of the above solutions. As one example of conventional conveyor-type drying apparatuses currently used for this purpose, as in the "dry material dryer and method of drying a dry material using the same" in Patent Document 1, an upper portion of one side of the interior of the housing is provided with a drying A hopper for receiving and guiding the material is installed. An air-prong with ventilation holes is installed and fixed on the bottom plate. A blowing pipe for forced ventilation into the dryer is installed at an appropriate place inside the dryer. The upper and lower air-plenum conveyors, which are assembled in the form of an endless track in a hinge manner below the hopper, are horizontally arranged in parallel to each other, And a configuration for turning the sea orbit.

However, in the case of this conventional embodiment, since the drying of the drying material is mostly accomplished by the blowing of the hot air, the drying material on the conveyor is increased when the supply speed of the hot air is increased in order to improve the drying speed, There is a problem that it is scattered and blown away.

Another conventional example is to improve the drying efficiency by installing a plurality of conveyors in the drying chamber and to install a far infrared ray heater on the conveyor with a dry heat source. However, But it was not enough to shorten the drying time.

On the other hand, in order to shorten the drying time in a conveyor-type dryer such as a red pepper dryer, a method of shortening the drying time by providing a separate preheater or the like at the tip of the dryer is used. However, Organic properties have been destroyed.

For this reason, there is a demand for a dryer that can dry in a short period of time without raising the temperature of the material to a certain level or more.

Patent Document 1: Korean Patent Publication No. 10 = 1996-0013214

The present invention has been made to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide a method and apparatus for efficiently drying and drying continuously the interior of a desiccant to be dried even at a relatively low temperature at which carbonization or deterioration does not occur using a near- And to provide an apparatus for continuously drying a downflow air type infrared ray conveyor.

In the state where the drying material is stably fixed to the conveyor by the hot wind descending air stream passing from the upper side to the lower side through the drying material, the drying material is lowered by the airflow passing through the narrow space between the drying materials, And an object of the present invention is to provide a continuous drying apparatus of a descending air flow type infrared ray conveyor capable of rapidly discharging water vapor generated by heating in a drying material by pressure, thereby enabling quick and efficient drying.

A further object of the present invention is to provide a continuous drying apparatus for a downward air flow type infrared ray conveyor which is partitioned by a partition wall to provide a drying environment optimized for each stage during drying by controlling the amount of heating and the amount of air blowing I will do it.

In order to accomplish the above object, the apparatus for continuously drying a descending air flow type infrared ray conveyor according to the present invention comprises an inlet 11 through which a desiccant material g to be dried is introduced to one side, A main body 10 having an outlet 12 formed therein and a mesh (not shown) disposed inside the main body 10 for sequentially transferring the drying material g from the inlet 11 to the outlet 12 and an air supply unit for supplying the air sucked from the lower part of the main body to the drying unit and supplying air from the drying unit to the drying unit, (40) for circulating and supplying the air to the mesh conveyor (20) in a direction from the upper side to the lower side toward the mesh conveyor (20); and a near infrared ray And a far infrared ray heating apparatus (100); And a control unit.

The main body 10 is further provided with at least one partition having a through hole through which the mesh conveyor 20 can pass and is divided into a plurality of drying chambers by the partition walls Wherein the lower airflow circulating and drying means (40) and the near infrared ray and far infrared ray heating apparatus (100) are installed to operate independently in each of the drying chambers.

The downward airflow circulating and drying means 40 includes an inlet port 41 for sucking air from the lower side of the main body 10 located below the mesh conveyor 20, A blowing unit 43 for blowing air supplied from the blowing unit 42 to the upper surface of the main body 10; And further comprising:

The near infrared ray and far infrared ray heating apparatus 100 includes a case 110 having an opening 111 at a lower portion thereof and a heater mounting groove 122 provided at an inner lower portion of the case 110 The heater mounting plate 121 is formed on both sides of the heater mounting plate 121. The heater mounting plate 120 is opened and the heater mounting plate 120 is inserted between the heater mounting grooves 122, And a reflector 140 installed on the heater mounting base 120 and reflecting the heat radiated from the heater 130. The heater 130 is mounted on the heater mounting base 120, A ceramic filter plate 150 installed in the opening 111 to pass only far-infrared rays or near-infrared rays of heat radiated from the heater unit 130 and emit far-infrared rays according to their natural frequencies; And a control unit.

The temperature of the hot air circulating through each of the drying chambers is measured by a temperature sensor (not shown) provided in a pipe connecting the inlet port 41, the blowing means 42 and the blowing port 43 .

According to the present invention, there is an advantage that it is possible to efficiently heat the inside of a drying material to be dried and continuously dry even at a relatively low temperature at which carbonization or deterioration does not occur using a near infrared ray and far infrared ray heating apparatus.

In the state where the drying material is stably fixed to the conveyor by the hot wind descending air stream passing from the upper side to the lower side through the drying material, the drying material is lowered by the airflow passing through the narrow space between the drying materials, The steam generated by the heating in the drying material can be quickly discharged by the pressure, which makes it possible to dry more quickly and efficiently.

Meanwhile, since the inside of the main body is partitioned by the partition walls, the heating amount and the blowing amount for each drying chamber can be controlled to provide an optimal drying environment for each stage during drying.

1 is a front sectional view schematically showing the entire configuration of a continuous drying apparatus according to an embodiment of the present invention;
2 is a side sectional schematic view showing a blowing configuration of a continuous drying apparatus according to an embodiment of the present invention;
3 is a schematic diagram showing a blow drying structure of a continuous drying apparatus according to an embodiment of the present invention.

4 is a top view of a near-infrared and far-infrared heating apparatus of a continuous drying apparatus according to an embodiment of the present invention.
5 is a cross-sectional view of a near-infrared and far-infrared heat generating apparatus of a continuous drying apparatus according to an embodiment of the present invention.
Fig. 6 is a view showing a structure of a heater mounting base and a reflection plate of a near-infrared and far-infrared heating apparatus of a continuous drying apparatus according to an embodiment of the present invention.
7 is a cross-sectional view showing the operation of a near-infrared and far-infrared heating apparatus of a continuous drying apparatus according to an embodiment of the present invention;
8 is a graph showing the infrared transmission characteristics of a ceramic filter plate of a near-infrared and far-infrared heat generating apparatus of a continuous drying apparatus according to an embodiment of the present invention.

Hereinafter, a descending airflow type infrared conveyor continuous drying apparatus according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. First, it should be noted that, in the drawings, the same components or parts are denoted by the same reference numerals whenever possible. In describing the present invention, a detailed description of known functions and configurations incorporated herein will be omitted so as to avoid obscuring the subject matter of the present invention.

1, the descending airflow type infrared conveyor continuous drying apparatus of the present invention includes a main body 10, a mesh conveyor 20, a downflow air circulation drying unit 40, a near infrared ray and far infrared ray heating apparatus 100 ).

First, the main body 10 will be described. As shown in FIG. 1, the main body 10 has an inlet 11 through which a desiccant material g to be dried is introduced and a discharge port 12 through which the dried dried material is discharged. have.

Next, the mesh conveyor 20 will be described. 1, the mesh conveyor 20 is installed inside the main body 10, and the drying material g is loaded from the loading port 11 to the discharging port 12, . 2 and 3, the mesh conveyor 20 is characterized in that the airflow can pass freely up and down. The mesh conveyor 20 having such a function can be configured through various embodiments such as a wire mesh, a conveyor claw having a porous hole, and the like.

Next, the descending airflow circulating and drying means 40 will be described. As shown in Figs. 1 and 2, the downward airflow circulating and drying means 40 supplies the air sucked from the lower portion of the main body 10 again from the upper side of the main body 10, And has a function of continuously circulating and supplying the airflow w so as to pass from the upper side to the lower side toward the drying material g and the mesh conveyor 20 as shown in Fig.

The embodiment of implementing the downward airflow circulating and drying means 40 having such a function can be applied to a wide variety of embodiments. However, the drying material g may have a property of being mounted on the mesh conveyor 20 The drying material g is stably stuck to the upper portion of the mesh conveyor 20 so as not to be scattered while being fixed and loaded so that the air flow w is supplied from the upward direction, And it is preferable to be constructed in consideration of frequent water washing using water in washing or the like. 2, the downward airflow circulation and drying unit 40 is installed on the lower portion of the mesh conveyor 20 so as to prevent inflow of washing water or the like, (42) for circulating and driving the air sucked from the air inlet (41); and a blowing means (42) for blowing air supplied from the blowing means (42) g) to the upper surface of the main body 10 so as to be stably adhered to the upper portion of the mesh conveyor 20. [

Next, the near-infrared and far-infrared heat generating apparatus 100 will be described. As shown in FIG. 1, the near infrared ray and far infrared ray heating apparatus 100 is installed at the upper side of the main body 10 so as to efficiently supply the inside of the drying material to be dried even at a relatively low temperature at which carbonization or deterioration does not occur To provide a heat source for heating the heat source.

As shown in FIGS. 4 and 5, the near infrared ray and far-infrared ray heating apparatus 100 may include, for example, And a heater mounting plate 121 provided on the inner lower side of the case 110 and having a plurality of heater mounting grooves 122 formed on both sides of the case 110 The heater unit 130 is installed between the heater mounting base 120 and the heater mounting groove 122 facing each other on both sides thereof and discharges heat according to the supplied current. A reflection plate 140 installed on the heater mounting base 120 and reflecting the heat radiated from the heater means 130 and a reflection plate 140 installed on the opening 111 to reflect the heat radiated from the heater means 130. [ Far-infrared or near infrared component of heat And a ceramic filter plate 150 that emits far-infrared rays according to its own natural frequency.

First, the case 110 will be described. The case 110 has a function of a main body constituting a near-infrared and far-infrared heating apparatus of the dryer of the present invention. An opening 111 is formed in the lower portion of the case 110 as shown in FIG. 4 so that far-infrared rays or near-infrared rays are emitted. 2, in order to discharge polluting means, which may be introduced into the case 110, and to prevent carbonization or deposition due to overheating, a cooling means for supplying air for cooling to the inside of the case 110, (170). Even in such a case, when the heater means 130 includes any one of a halogen lamp or a carbon heater to be described later, since most of the heat transfer is transmitted in the form of radiation heat, The heat loss caused by the heat dissipation remains at a negligible level.

Next, the heater mounting base 120 will be described. 5 and 6, the heater mounting base 120 is installed on the inner lower side of the case 110 and has a heater mounting plate 121 on which a plurality of heater mounting grooves 122 are formed, Respectively, and the lower surface thereof is opened. In this case, the heater mounting base 120 can effectively receive and discharge the heat generated by the heater means 130, and in order to uniformly cause thermal expansion without local expansion, aluminum Or a metal alloy containing copper.

Next, the heater means 130 will be described. As shown in FIGS. 5 and 6, the heater unit 130 is installed between the heater mounting grooves 122 facing each other on both sides, and has a function of emitting heat according to the supplied current. 5 and 6, in order to stably support the heater mounting plate 121 despite the longitudinal expansion of the heater unit 130 due to thermal expansion, Side end portions of the end portion.

Meanwhile, the heater unit 130 may include any one of a halogen lamp and a carbon heater so that the heating unit 130 can be instantly heated, and the heating value and the heating temperature can be controlled according to the supplied current. The heater unit 130 having such a heat generating characteristic is combined with a ceramic filter plate 150 to be described later, and brings about an operation effect unique to the present invention, which enables different distribution of an infrared wavelength band suitable for a drying object.

Next, the reflection plate 140 will be described. As shown in FIGS. 5 and 6, the reflection plate 140 has a function of reflecting heat radiated from the heater unit 130, which is installed on the heater mounting base 120. In this case, it is preferable that the reflection plate 140 is made of a metal alloy including aluminum having good reflectance and thermal conductivity.

Next, the ceramic filter plate 150 will be described. 5 and 7, the ceramic filter plate 150 is installed in the opening 111 and allows only the far-infrared or near-infrared component of the heat radiated from the heater 130 to pass therethrough, And emits a far-infrared ray. The ceramic filter plate 150 having such a function usually has translucency. This is explained in more detail as follows.

As shown in FIG. 8, the ceramic filter plate 150 has a characteristic of passing far-infrared rays having near or far infrared rays having a specific wavelength, and absorbing and blocking rays having other short wavelengths.

In the case where the heater means 130 emits radiant heat of various wavelengths according to the characteristics thereof and the heater means 130 includes any one of a halogen lamp and a carbon heater as described above, When the supply is increased, the wavelength of the near infrared region is outputted. Therefore, in order to maintain the emission state of the far infrared ray which is advantageous for the deep penetration of the material to be dried due to the long wavelength, it is necessary to reduce the amount of current, and when the amount of current decreases, the amount of heat required for drying is insufficient.

Therefore, in order to solve this problem, in the present invention, a plurality of the heater means 130 (halogen lamp or carbon heater) is used to supply an amount of heat suitable for drying even at a low current amount, So that a large amount of heat necessary for drying can be supplied while maintaining the wavelength.

On the other hand, in accordance with the change in the absorption wavelength band depending on the color or the characteristic of the drying material (for example, in the case of red red pepper and in the case of blue cucumber, there is a difference in the wavelength of infrared rays to be absorbed) It is also possible to control the wavelength distribution of infrared rays generated by the heater means 130 when adjusting the amount of current supplied to the heater 130. That is, if the amount of the current supplied to each of the heater units 130 is reduced, the emission ratio of far-infrared rays having a longer wavelength is increased and the emission rate of the near-infrared rays having a relatively shorter wavelength is decreased. On the other hand, since the emission ratio of the long-wavelength far-infrared rays is reduced and the emission ratio of the near-infrared ray having a relatively short wavelength becomes large, it becomes possible to control the wavelength region characteristic of the overall output.

In the meantime, when a normal operating current is supplied to the heater means 130, about 80% of heat is generated in the form of infrared rays, and heat of about 20% is generated in the wavelength range other than infrared rays. Heat is concentrated on the surface of the drying material, which causes the surface of the drying material to overheat, thereby deteriorating the drying quality. In this case, as shown in FIG. 8, the ceramic filter plate 150 has a characteristic of passing far-infrared rays or near-infrared rays having a specific wavelength, and absorbing and blocking light having other short wavelengths, (For example, a visible ray or an ultraviolet ray) having a low transmittance is allowed to pass through the ceramic filter plate 150 itself while absorbing the heat of the ceramic filter plate 150. [ Thereby raising the temperature.

Accordingly, even a heat source of a short wavelength (for example, a visible ray or an ultraviolet ray) having a low transmittance due to a temperature rise is eventually released as heat of a far infrared ray wavelength band. Therefore, most of the generated heat is converted into infrared ray (near infrared ray to far infrared ray) (Near infrared rays to far infrared ray) having a high permeability is used as a heat source, and the temperature difference between the surface and the inside of the drying material is slightly heated to rapidly activate the internal moisture, thereby improving the efficiency of the dryer .

5, the ceramic filter plate 150 has a function of cutting off the heater 130 from the outside, so that the heater 130, which is a heat source, Since the heater can generate heat in a structure isolated from the drying chamber, it is possible to prevent the heater 130 from being contaminated and to prevent the deposition or carbonization of contaminants.

1, the main body 10 is provided therein with at least one partition having a through hole through which the mesh conveyor 20 can pass, and a plurality of And the lower airflow circulation drying unit 40 and the near infrared ray and far infrared ray heating unit 100 are installed to operate independently in each of the drying chambers, It is preferable to adjust the heating amount and the blowing amount so as to provide a drying environment optimized for each stage during drying. 1, the internal space of the main body 10 is divided into four portions of the first drying chamber 15, the second drying chamber 16, the third drying chamber 17 and the fourth drying chamber 18 The number of the drying chambers is not limited thereto, and it is possible to increase or decrease the number of the drying chambers as necessary.

With this configuration, it is possible to provide a compartment in which strong heat is given when the temperature of the drying material (g) is low at the beginning of drying, a compartment for supplying only the heat necessary for maintaining a moderate moisture activity when the temperature of the drying material reaches the water activation temperature, It becomes possible to constitute a compartment in which the drying material gives a weak heat for moisture balance at the time when the drying is completed. The larger the number of such compartments, the more precise and finer the drying operation can be efficiently performed. In this case, the temperature of each of the drying chambers is controlled by the air inlet 41 and the air blowing means 42 (see FIG. 2) so as to measure the temperature of the circulating hot air without avoiding the radiant heat radiated directly by the near infrared ray and far- And a temperature sensor (not shown) installed in a piping connecting the blowing port 43. In this case, in accordance with the value set by the user to the drying temperature of each of the drying chambers, the output of the near infrared ray and far infrared ray heating apparatus 100 in each of the drying chambers and the operating intensity of the downflow air circulation drying means 40 It is preferable to configure such that it can control. After the temperature of the circulating hot air is measured, the output of the near infrared ray and far-infrared ray heating apparatus 100 in each of the drying chambers and the temperature of the falling air stream The technique for controlling and controlling the operation strength of the circulation and drying unit 40 is a well-known technology used in the technical field of the present invention, and thus a detailed description thereof will be omitted.

Hereinafter, a drying operation process by a descending air flow of the descending airflow type infrared ray conveyor continuous drying apparatus 1 according to an embodiment of the present invention will be described.

As shown in FIG. 2, the descending airflow type infrared conveyor continuous drying apparatus 1 according to the embodiment of the present invention is configured such that the air drawn from the lower portion of the main body 10 by the downward airflow circulation drying means 40 Is supplied again from the upper side of the main body 10 so that the airflow w is continuously circulated so as to pass from the upper side to the lower side toward the drying material g and the mesh conveyor 20. In this case, the air flow w has a function of primarily allowing the drying material g to stably stably contact with the mesh conveyor 20 without being scattered, and to be transported in a fixed state . Further, as shown in Fig. 3, by the above-mentioned air flow w which passes through the narrow space (s) between the drying materials g between the drying materials g, The dynamic pressure of the portion s becomes lower than the peripheral portion. In this case, the moisture vaporized in the form of water vapor (v) in the drying material (g) by the heat supply is "inversely proportional to the pressure of a certain amount of gas at a constant temperature and its volume" The diffusion of the gas as a derived effect is discharged more quickly and efficiently into the inter-dry space s in accordance with the principle that the pressure is made more effective in the low-pressure direction.

On the other hand, the airflow w prevents overheating of the upper side of the drying material g due to heat radiated from the near-infrared rays and the far-infrared heat generating device 100 concentrated on the upper side of the drying material g, It also has a function of preventing deterioration.

In the foregoing, optimal embodiments have been disclosed in the drawings and specification. Although specific terms have been employed herein, they are used for purposes of illustration only and are not intended to limit the scope of the invention as defined in the claims or the claims. Therefore, those skilled in the art will appreciate that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

g: Dry material w: Air flow
s: Space between dry materials v: Water vapor
1: Downflow type infrared conveyor continuous drying device
10: Body
11: inlet 12: outlet
15: first drying chamber 16: second drying chamber
17: third drying chamber 18: fourth drying chamber
20: Mesh conveyor
30: first partition 31: first passage
32: second partition wall 33: second passage hole
34: third partition wall 34: third passage hole
40: Downflow air circulation drying means
41: inlet port 42: blowing means
43: Tuyere
100: near-infrared and far-infrared heating device
110: Case 111:
120: heater mounting base 121: heater mounting plate
122: heater mounting groove 123: heater mounting portion
124:
130: heater means 131:
132: terminal portion
140: reflector 141: heater fixing portion
150: ceramic filter plate 151: filter plate bonding member
160: cover
170: cooling means

Claims

A main body 10 having an inlet 11 through which the drying material g to be dried is introduced and a discharge port 12 through which the dried drying material is discharged is formed on one side of the main body 10;
A mesh conveyor 20 installed inside the main body 10 for sequentially transferring the drying material g from the inlet 11 to the outlet 12 and transferring the drying material g;
The air sucked from the lower part of the main body 10 is supplied from the upper side of the main body 10 so that the air flow w is supplied to the drying material g and the mesh conveyor (40) which continuously circulates and supplies the air to the lower portion (20) so as to pass from the upper side to the lower side;
A near infrared ray and far infrared ray heating apparatus 100 installed on the upper side of the main body 10; (1) according to claim 1 or 2, characterized in that the lowering air flow type infrared ray conveyor continuous drying apparatus (1) comprises a lower airflow type infrared ray conveyor continuous drying apparatus (1).

The method according to claim 1,
The main body 10 has, inside thereof,
At least one partition wall having a through hole through which the mesh conveyor 20 can pass is provided and is partitioned into a plurality of drying chambers by the partition wall,
Wherein the lower airflow circulating and drying means (40) and the near infrared ray and far infrared ray heating apparatus (100) are installed to operate independently in each of the drying chambers, respectively. .

The method according to claim 1 or 2,
The downward airflow circulating and drying means (40)
An inlet port 41 for sucking air from a lower side surface of the main body 10 located below the mesh conveyor 20;
A blowing means (42) for circulating and driving the air sucked from the suction port (41);
A blowing port (43) for supplying the air supplied from the blowing means (42) to the upper surface of the main body (10); (1), characterized in that it further comprises:

The method of claim 3,
The near infrared ray and far-infrared ray heating apparatus (100)
A case 110 having an opening 111 formed at a lower portion thereof;
A heater mounting plate 121 formed on both sides of the case 110 and having a plurality of heater mounting grooves 122 formed on the inner lower side of the case 110,
Heater means (130) inserted between the heater mounting grooves (122) facing each other on both sides and discharging heat according to the supplied current;
A reflector 140 installed on the heater mounting base 120 and reflecting the heat radiated from the heater 130;
A ceramic filter plate 150 installed in the opening 111 to pass only far-infrared rays or near-infrared rays of heat radiated from the heater unit 130 and emit far-infrared rays according to their natural frequencies; (1) according to claim 1, characterized in that the lowering air flow type infrared ray conveyor continuous drying apparatus (1) comprises:

The method according to claim 4,
The temperature of the hot air circulating through each of the drying chambers is measured by a temperature sensor (not shown) provided in the piping connecting the inlet port 41 with the blowing means 42 and the blowing port 43 (1).