KR101659814B1

KR101659814B1 - Disk type dryer

Info

Publication number: KR101659814B1
Application number: KR1020150140823A
Authority: KR
Inventors: 이순걸; 이범노; 김현우
Original assignee: 주식회사 삼우티씨씨
Priority date: 2015-10-07
Filing date: 2015-10-07
Publication date: 2016-09-27

Abstract

The present invention relates to a disk type dryer for drying food waste and the like.
In the present invention, the food waste is stirred using the rotating disk in the drum, and the food waste is supplied by supplying steam. In addition, the method of supplying the high temperature air together with the water contains about 80% The present invention realizes a new type of steam and air drying method capable of efficiently drying the food waste being dried in a short period of time, thereby greatly reducing the moisture content of the food waste, thereby improving the drying efficiency, The present invention provides a disc dryer capable of increasing the overall efficiency of food garbage disposal such as drying in an appropriate state.

Description

Disc type dryer

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk dryer, and more particularly, to a disk-type dryer for drying food waste, sludge and the like.

In general, food waste that is discharged daily from a restaurant or a household can be recycled as animal feed, organic-rich compost, fuel aid, etc., while maintaining proper humidity and temperature.

However, when it is buried or incinerated with general household garbage, food waste may pollute other household garbage, resulting in a lot of social problems such as odor, leachate, environment caused by generation of wastewater, soil and water pollution.

In consideration of this, various types of food waste driers such as a fermentation type, a dehydration type, a crushed dry type, a hot wind and a hot wind type dry type are proposed.

The fermentation type treatment method has a disadvantage in that a microorganism strain is added to food waste to remove moisture through a fermentation process and a space capable of temperature and humidity control is required, and odor is generated and a treatment time is long.

The dewatering treatment method is to remove moisture from the food waste by a centrifugal separation method or a press compression method, which requires a mechanical device, requires subsequent treatment, and has a disadvantage of frequent failure and complete drying.

The pulverizing and drying method causes the food waste to be crushed and dried at the same time. The crushing device breaks down frequently due to the bones or solids of the animal, and the food waste is hardened in the jelly state during the crushing due to rice, cooking oil, , There is a disadvantage that a malodor is generated due to residual food in the machine.

The hot air and hot air drying method is a method widely used in a small food garbage disposer. The food waste is put in a container and placed in a drying room, and a circulating fan installed at the top of the drying room circulates hot air or hot air.

This type of hot air and hot air drying method involves drying from the surface of food garbage to the inside of the food garbage so that a dry film is formed on the surface of the food garbage and the heat is not transferred to the inside of the food garbage for 12 hours or more. There are disadvantages.

Recently, a method of drying food waste using high temperature steam has been proposed. However, in this method, the heat of steam is not transferred to the center of the dryer, but only the food waste leaned toward the outer surface of the dryer is slightly dried, There is a disadvantage that the drying efficiency and the treatment efficiency are generally low because garbage is bundled like porridge or rounded like a ball and it is difficult to lower the water content as much as desired.

For example, a drying method using steam involves drying from the surface to enter the inside, so that a drying film is formed on the surface when the drying is slightly performed, and this drying film interferes with heat transfer and is usually dried for 12 hours or more, The drying may not be performed properly.

Background arts of the present invention are disclosed in Korean Patent Laid-open Publication No. 10-2011-0102587, Korean Utility Model Publication No. 20-2009-0002438, and the like.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a method of drying food waste by stirring food waste by using a disk rotating inside the drum and drying the food waste by supplying steam, And a new type of steam and air drying method capable of efficiently drying food waste containing moisture of about 80% or more in a short period of time, thereby greatly reducing the water content of the food waste and improving the drying efficiency And it is an object of the present invention to provide a disk dryer capable of increasing the efficiency of the overall food garbage disposal such that the food waste can be dried uniformly and in an appropriate condition for the purpose of recycling the food waste.

In order to achieve the above object, the present invention provides the following features.

The disc dryer includes a dryer main body having an inlet for introducing food waste before drying and a discharge port for discharging food waste after drying, and a drum rotatably installed inside the dryer body, A disk rotating body which is formed by a plurality of disks formed in a disk shaft and which is heated by steam supplied to the inside to dry and stir the food waste, And a steam jacket having a steam inlet and a drain pipe for steam input and discharge and surrounding the periphery of the dryer body.

Here, the tip of the hollow shaft of the disk rotating body may extend to the outside of the dryer body and then be supplied with steam by a structure connected to the steam pipe via the double rotary valve.

In addition, the disc of the disc rotating body may be formed in a hollow disc shape, a plurality of which are concentric with the shaft while passing through the center by a shaft, and are arranged at regular intervals along the shaft axis.

The disk dryer is a means for supplying air into the disk rotating body. The disk drying machine includes a main pipe installed along the inner axis of the hollow shaft and supplied with air from the outside, a plurality of And a disk air supply device for supplying the air supplied through the main pipe and the sub pipe to the inside of the dryer body through an air hole formed in the disk.

In the case of such a disk air supply device, the leading end of the main pipe may extend out of the dryer main body and then be connected to the jacket air pipe via the double rotary valve so that air can be supplied to the sub pipe. A metal filter and a metal ball may be embedded in the end portion adjacent to the disk side air hole and a plurality of sub pipes are attached to one disk and are correspondingly connected to the inside of the dryer through a plurality of air holes in the disk Air can be supplied.

The disk dryer is provided with means for supplying air into the dryer body. The disk dryer includes an air pipe installed along the inside of the steam jacket and supplied with air, and an air pipe installed along the longitudinal direction of the air pipe, And an air jet nozzle which is located and blows air.

It is preferable that a plurality of the air pipes of the jacket air supply device are formed and the plurality of air pipes are arranged along the length direction of the dryer body in the lower space of the steam jacket and along the circumferential direction of the dryer body.

The disk dryer provided in the present invention has the following advantages.

First, applying the steam drying method of drying the food waste using the high temperature steam, and applying the air drying method of drying the food waste using the high temperature air, the surface of the food waste is not dried but dried It is possible to lower the moisture content of the food waste and to dry the food waste in an optimal state, thereby improving the drying efficiency and treatment efficiency of the food waste.

Second, by applying a type in which air is simultaneously injected from the central part and the outer part through nozzles in the dryer body jacket and nozzles in the dryer body jacket during high temperature air supply, the high temperature air is uniformly mixed in the inside of the food waste being stirred in the dryer It is possible to obtain an even drying effect as a whole, and the efficiency of drying food garbage can be further improved.

Third, by adopting the method of heating the air to be introduced into the dryer by using the recovered steam, there is no need for a separate facility for heating the air, so that it is economical to operate and manage the dryer, and the steam temperature The energy saving effect can be achieved.

Therefore, the treated product dried through the disc dryer of the present invention can be used not only as an animal feed but also as an environmentally-friendly and beneficial product which can be recycled as a high-quality compost or a fuel additive, .

1 is a front view showing a disc dryer according to an embodiment of the present invention;
2 is a plan view showing a disc dryer according to an embodiment of the present invention.
3 is a side view showing a disc dryer according to an embodiment of the present invention
4 is a front view showing a disk structure in a disk dryer according to an embodiment of the present invention.
5 is a side view showing a disk structure in a disk dryer according to an embodiment of the present invention
6 is a perspective view illustrating paddles provided on a disc in a disc dryer according to an embodiment of the present invention.
7 is a schematic diagram illustrating a double rotary valve (joint) in a disc dryer according to an embodiment of the present invention;

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

1 to 3 are a front view, a plan view, and a side view, respectively, of a disc dryer according to an embodiment of the present invention.

As shown in FIGS. 1 to 3, the disc dryer includes a dryer body 12 as a means for providing space for drying food waste.

The dryer main body 12 is formed in a cylindrical drum shape and is installed in a side lying position. On the upper side of the rear end side, an inlet 10 through which food waste for drying can be inputted is formed, An outlet 11 for discharging the finished food waste is formed.

A plurality of openable and closable lids 32 are provided on the upper surface and the upper side of the dryer body 12. The lid 32 is used for checking the operation status inside the dryer main body, .

Accordingly, when the food waste is put into the dryer body 12 through the inlet 10, the food waste is dried by the rotation of the disk rotating body 15 to be described later and is moved toward the outlet 11 And the dried food waste can be discharged through the discharge port 11 in a form of overflowing, that is, in a state in which it is pushed up by the food waste before drying, which is continuously inputted.

In addition, the disk dryer includes a driving device 16 as a means for rotating the hollow shaft 13 of the disk rotating body 15.

The driving unit 16 is a type using motor power and chain transmission and includes a motor 16a provided at one side of the rear end of the dryer body 12 and a motor side sprocket 16b mounted on the shaft of the motor 16a A shaft side sprocket 16c mounted on the rear end of the hollow shaft 13 and a chain 16d connected between the motor side sprocket 16b and the shaft side sprocket 16c.

Accordingly, when the motor 16a is operated, the disk rotating body 15 can be rotated through power transmission by the chain and the sprocket.

It should be noted that a combination of a belt and a pulley may be applied to the means for transmitting the motor power.

In addition, the disk dryer includes a steam jacket 19 as means for maintaining the temperature of the dryer body 12 using steam.

The steam jacket 19 surrounds the entire outer circumferential surface of the dryer main body 12 except for the upper surface portion and the side upper portion of the dryer main body 12 on which the cover 32 is provided, And a space is formed between them.

For example, the steam jacket 19 may be installed over the entire length of the dryer body 12 and may extend over the other side and bottom of the entire circumference except for the upper portion.

The steam jacket 19 may be formed as one jacket through which the whole of the steam jacket 19 passes, but it is preferable that the steam jacket 19 is divided into three or four compartments, .

The steam jacket 19 is provided with a plurality of steam inlets 17 for supplying steam and a plurality of drain pipes 34 for discharging steam.

Accordingly, the steam at a high temperature, for example, about 100 to 200 ° C, supplied from an external steam supply source (not shown) enters the inside of the steam jacket 19 through the steam inlet 17, So that the dryer body 12 can be always maintained at a proper temperature since it flows through the drain pipe 34 in the form of condensed water after heating around the outer wall of the dryer body 12.

That is, a plurality of drain pipes 34 are installed at the bottom of the steam jacket 19. The drain pipe 34 is used to discharge condensed water generated in the steam jacket 19 to the outside of the steam jacket 19 .

In addition, the disc dryer includes a disc rotating body 15 as a means for heating, drying, and agitating food garbage, and further advancing the food garbage to one side.

The disk rotating body 15 is rotatably installed inside the dryer body 12 and includes a hollow shaft 13 and a plurality of disks 14 formed on the outer circumferential surface of the hollow shaft 13, The food waste can be dried by the heat of the disk 14 heated by the steam supplied to the inside of the hollow shaft 13 and the inside of the disk 14 at this time.

The hollow shaft 13 is disposed in parallel with the axis of the dryer body 12 in the dryer body 12 and both ends of the hollow shaft 13 are connected to the front and rear ends of the dryer body 12, And both ends of the hollow shaft 13 extending out of the dryer body 12 are supported by respective bearings 33 provided outside the front end and the rear end of the dryer body 12 .

A shaft flange 18 is formed at one end of the hollow shaft 13, for example, at an end portion of the dryer body 12 toward the front end of the dryer body 12. Thus, the hollow shaft 13 rotates the shaft flange 18 So that it can be connected to the double rotary valve 20 side while being fastened to the valve flange portion 20b of the double rotary valve 20 described later.

A shaft-side sprocket 16c to which the chain 16d is attached is attached to the end of the hollow shaft 13 extending to the rear end of the dryer body 12 so that the motor-side power can be received. The hollow shaft 13 can be rotated while being supported by the bearings 33 at both ends so that the entire disk rotating body 15 including the hollow shaft 13 and the disk 14 is rotated .

The hollow shaft 13 is connected to an external steam pipe 21 so that steam can be supplied into the shaft.

For this purpose, the distal end of the hollow shaft 13 extends beyond the distal end of the dryer body 12 and is supported by the bearing 33 and continues to be extended, To the discharge side of the valve (20).

A steam pipe 21 connected to an external steam supply source (not shown) is connected to the suction side of the double rotary valve 20.

Accordingly, the high temperature steam supplied from the steam supply source can be supplied to the inside of the hollow shaft 13 through the steam pipe 21 and the double rotary valve 20.

The connection structure between the double rotary valve 20 side and the hollow shaft 13 side will be described in more detail as follows.

7, the double rotary valve 20 is constituted by a valve body portion 20a which is fixed and a valve flange portion 20b which is a rotating body, and on the front face of the valve flange portion 20b, For example, an air discharge port 36 positioned on the center side, and a ring-shaped steam discharge port 37 located on the outer periphery side are formed. At the inner and outer peripheries of the steam discharge port 37, The seal member 38 is mounted so that the fluid can be prevented from being mixed with the air discharge port 36 and the steam discharge port 37 when the flanges are coupled as described later.

In the rear of the valve body portion 20b, there are formed two fluid inlets, for example, a steam inlet 39 located on the outer circumferential side and an air inlet 40 located on the rear side.

The valve flange portion 20b of the double rotary valve 20 and the shaft flange 18 at the end of the hollow shaft 13 are fastened while facing each other and the inside of the hollow shaft 13 is fastened And the inside of the main pipe 22 inside the hollow shaft 13 communicates with the air discharge port 36. In addition,

A steam pipe 21 is connected to the steam inlet 39 of the double rotary valve 20 and an air pipe 26 is connected to the air inlet 40.

The steam and the air supplied through the steam pipe 21 and the air pipe 26 pass through the predetermined valve internal flow path and then flow into the hollow shaft 13 through the steam discharge port 37 and the air discharge port 36. [ And to be supplied to the inside of the main pipe 22 and the inside of the main pipe 22, respectively.

Here, the double rotary valve may be a known dual rotary valve commercially available on the market, and thus a detailed description of its internal flow path and the like will be omitted.

The disk 14 of the disk rotating body 15 is formed in the form of a hollow disk having a space therein and is installed on the hollow shaft 13 through a center thereof so as to be coaxial with the shaft side .

A plurality of such disks 14 are provided so that the disks 14 can be arranged at regular intervals along the longitudinal direction of the hollow shaft 13.

The detailed structure of the disk 14 will be described in detail with reference to FIGS. 4 and 5. FIG.

The disk dryer is a means for supplying air to the inside of the disk rotating body 15 and is provided with a pipe inside the hollow shaft 13 and the disk 14 such as a main pipe 22 and a plurality of sub- A disk air supply (not shown) of a structure in which air supplied through a pipe is supplied in a heated state by steam in a hollow shaft by installing a pipe (23 in FIG. 4 and FIG. 5) Device (25).

The main pipe 22 and the sub pipe 23 of the disk air supply device 25 are installed inside the hollow shaft 13 of the disk rotating body 15 and receive air supplied from the outside, To the inside of the dryer main body 12 through the opening / closing operation.

Particularly, in order to supply air into the disk air supply device 25, the leading end portion of the main pipe 22 of the disk air supply device 25 is guided along the inside of the shaft, like the hollow shaft 13, And the leading end portion of the main pipe 22 extending in this way is connected to the discharge side of the double rotary valve 20 provided at the front side of the bearing 33. [

The suction port of the double rotary valve 20 is a jacket air pipe 26 which is connected to an external air supply source (not shown).

Accordingly, the air supplied from the air supply source can be supplied to the inside of the main pipe 22 through the jacket air pipe 26 and the double rotary valve 20.

Here, the main pipe 22 and the air pipe 29 described later may be general pipes. Alternatively, a plurality of circular cooling fins may be formed around the pipe circumferential surface at regular intervals along the longitudinal direction of the pipe It is preferable to use the fin tube as the heat transfer member in order to enhance heat exchange efficiency with steam.

The detailed structure of the disk air supply device 25 will be described in detail with reference to FIGS. 4 and 5. FIG.

In addition, the disk dryer includes a jacket air supply device 31 as means for supplying air into the dryer body 12.

For example, a pipe is installed inside the steam jacket 19, and the pipe is extended to the inner lower portion of the dryer body 12, and air is supplied to the lower portion of the inside of the dryer body through the pipe, And the jacket air supply device 31 is configured to supply the air heated by the steam in the steam jacket in a heated state.

The jacket air supply device 31 includes an air pipe 29 for air transfer and a plurality of air injection nozzles 30 for air injection. The air pipe 29 is connected to the steam jacket 19, And the air injection nozzles 30 are arranged on the air pipe 29 at regular intervals along the length of the pipe in the longitudinal direction of the jacket, i.e., along the longitudinal direction of the dryer body 12 And the jet port of the air jet nozzle 30 at this time is located inside the dryer body 12. [

Here, the air pipe 29 and the air injection nozzle 30 can be connected by a screw fastening structure, welding, or the like.

Accordingly, the air supplied from the external air supply source flows into the air pipe 29, and then can be introduced into the food waste in the dryer main body through the respective air jet nozzles 30 through the air pipe 29 .

At this time, the air flowing inside the air pipe 29 is heated by the heat exchanged with the high-temperature steam flowing through the steam jacket 19, that is, the heat conducted through the pipe. For example, So that the drying efficiency of the food waste can be increased by supplying high-temperature air to the food waste in the dryer body 12. As a result, the drying efficiency of the food waste can be improved.

The plurality of air pipes 29 are arranged along the longitudinal direction of the dryer body in the lower space of the steam jacket 19, And can be arranged side by side at regular intervals along the circumferential direction of the main body.

Accordingly, high-temperature air can be intensively introduced into the lower space of the inside of the dryer body 12 through the respective air injection nozzles 30 in the air pipes 29 of a plurality of lines.

4 and 5 are a front view and a side view showing a disk structure in a disk dryer according to an embodiment of the present invention.

As shown in FIGS. 4 and 5, the disk 14 is formed in the form of a hollow disk having a space therein.

At this time, the disk 14 may have a reduced width as it goes from the center side to the outer side, that is, a disk whose thickness gets thinner toward the outer side from the center side.

Each of the disks 14 is made up of a plurality of disks. The disks 14 are concentrically arranged with the hollow shaft 13 in a state in which the disks 14 are arranged in a line while being spaced from each other at regular intervals, And the like.

An air hole 24 is formed in the front and rear surfaces of the disk 14 so as to communicate with the sub pipe 23 inserted in the disk. The disk air supply device 25 So that the air supplied from the sub-pipe 23 of the sub-pipe 23 can be discharged.

Particularly, the means for supplying air into the inside of the disk rotating body 15 including the hollow shaft 13 and the disk 14, that is, means for supplying air to the inside of the disk rotating body 15 through the inner space region of the disk rotating body 15 A disk air supply device 25 is provided as a means for supplying air into the inside of the apparatus.

The disk air supply device 25 includes a main pipe 22 for introducing air from the outside and a sub pipe 23 for introducing air into the dryer body 12.

The main pipe 22 is a pipe having a relatively small diameter as compared with the hollow shaft 13 and is arranged in parallel with the central axis in the hollow shaft 13, (23).

The rear end portion of the main shaft 22 is connected to the double rotary valve 20 side outside the dryer body 12 along the inside of the hollow shaft 13 as described above do.

The sub pipe 23 is branched perpendicularly to the main pipe from the outer circumferential surface of the main pipe 22 and the end portion of the sub pipe 23 branched in this way is inserted into the inner space of the disk 14, Is connected to an air hole (24) in the disk (14).

Thereby, an air passage leading to the inside of the main pipe 22, the inside of the sub pipe 23, and the air hole 24 can be made, and air can be introduced into the dryer body through the air passage thus formed .

The plurality of subpipes 23 may be provided corresponding to the number of the disks 14, and each of the subpipes 23 may be disposed at regular intervals along the circumferential direction of the disk main plate.

For example, in the present invention, four subpipes 23 arranged at intervals of 90 degrees along the circumferential direction of the disk are attached to one disk, and in the related art, And four air holes 24 corresponding to the pipes 23 can be provided on the front and rear sides, respectively.

As another example, the subpipe 23 may be attached to a plurality of disks per disk, and in the case of the air hole 24, a plurality of subpipes 23 are arranged at regular intervals along the disk circumferential direction per disk, Or a circular shape of two lines.

The air supplied from the external air supply source flows into the main pipe 22 and then passes through the sub pipe 23 and then passes through the air hole 24 in the disk 14, It can be put into the garbage side.

At this time, the air flowing in the main pipe 22 and the sub pipe 23 is heat-exchanged with the high-temperature steam flowing in the hollow shaft 13, that is, the temperature is increased by the heat conducted through the pipe For example, about 150.degree. C. and heat exchange with the steam heat of, for example, about 150.degree. C., so that the high temperature air is introduced into the food waste in the dryer main body 12 to increase the drying efficiency of the food waste.

A metal filter 27 made of stainless steel or the like and a metal ball 28 made of stainless steel or the like are installed inside the sub pipe 23 in order at the end adjacent to the disk air hole 24, The metal ball 28 is caught by the jaw portion protruding from the inner surface of the sub pipe 23 and can be restricted from moving toward the center.

Here, the metal filter 27 serves to prevent foreign substances generated during drying from flowing back into the pipe, and the metal ball 28 is rotated in the downward direction So as to control the airflow while moving up and down within the sub-pipe 23.

For example, in the case of a metal ball located above the disc, the air flow is blocked while resting on the jaw, and in the case of a metal ball located under the disc, air can flow from the jaw portion.

It is preferable that the metal ball at this time has a diameter smaller than the inner diameter of the sub-pipe.

In addition, the disc 14 includes a paddle 35 as a means for pushing food waste in one direction, for example, from the inlet to the outlet.

For example, as shown in Fig. 6, the paddles 35 are formed in a shape in which two plate members are combined in an intersecting direction, for example, "ㅗ" 14 (oblique direction with respect to the disk thickness center line) by welding or the like.

A plurality of such paddles 35 can be installed at regular intervals along the circumference of the disk 14.

As a result, the food garbage can be pushed in one direction by the paddle 35 installed in the diagonal direction when the disk 14 rotates. As a result, the food garbage introduced from the inlet 10 is dried and discharged toward the discharge port 11 It is possible to proceed.

As another example of the present invention, means for supplying high-temperature air to the inner lower portion of the dryer body 12 includes means for heating the air using waste heat and then supplying the heated air to the dryer body.

That is, a large amount of steam is used due to the characteristics of the indirect heat dryer, and a large amount of waste heat or condensed water is generated as much steam is used.

This effectively recovers waste heat or condensed water generated thereby, and heats the air injected into the inside of the dryer (lower part), thereby making it possible to increase the energy utilization efficiency.

To this end, a waste heat recovering device (not shown) such as a heat exchanger, a steam trap, an economizer, and the like is provided outside the dryer body 12, and the heated air is heated using the waste heat recovering device By supplying the drying water to the lower portion of the dryer main body 12, not only the drying efficiency of the food waste can be increased, but also the energy utilization efficiency can be increased by utilizing the waste heat.

(Not shown) connected to the inner lower portion of the dryer main body 12 after the heat exchange from the waste heat recovering device at this time can be connected to a suitable place under the dryer main body 12 without passing through the steam jacket.

Accordingly, the operating state of the disk dryer constructed as above will be described below.

First, a certain amount of food waste, for example, food waste having a water content of 80% or more is introduced through the inlet 10 of the dryer body 12. [

Next, after the food waste is charged, the disk rotating body 15 is rotated by the driving device 16, and then the high temperature steam is supplied into the hollow shaft 13, and also the steam jacket 19 High temperature steam is supplied.

The disk 14 is heated by the steam supplied to the hollow shaft 13 at this time so that the surface temperature of the disk is increased and the drum wall surface of the dryer body 12 is also heated by the steam supplied to the steam jacket 19 The temperature of the inner wall of the drum wall is increased.

In this state, the food waste mixed and stirred by the rotation of the disk in the dryer body 12 can be dried while being in contact with the wall surface of the drum as well as the surface of the disk where the temperature rises.

In addition, high-temperature air is introduced into the food waste in the central region of the dryer body through the main pipe 22, the sub-pipe 23, and the disk-side air hole 24 of the disk air supply device 25, High-temperature air is introduced into the outer peripheral region of the dryer main body, particularly toward the food garbage side in the lower region, through the air pipe 29 and the air jet nozzle 30 of the jacket air supply device 31.

Accordingly, the food garbage can be more effectively dried by the high-temperature air that is intensively put in the central area and the lower outer area of the dryer body 12. [

The food waste charged into the dryer body 12 is dried by contact with the surface of the disk and dried by high-temperature air injection. After the food waste is moved to the outlet 11, The drying process for the food waste is completed.

Table 1 below shows the results of treatment of food waste using the disc dryer of the present invention.

As can be seen from Table 1 above, carrier air entering the inside of the dryer main body had no influence on the drying efficiency by injecting air of about 20 ° C in the air from the upper part without any additional device. In the present invention, Air is introduced into the lower part of the steam jacket of the steam jacket and air is introduced into the dryer body through the air pipe so that waste heat of steam and condensed water collected at the lower part of the steam jacket can be used to cool the steam jacket to about 80 ° C So that it is possible to reduce the amount of steam consumed by 10% or more. Thus, the total energy required for drying food waste can be saved.

For example, when 20 ° C air is injected, the steam flow rate is 3,404.93 kg / hr. However, when 80 ° C air heated by steam is injected, the steam flow rate is 2,985.04 kg / hr.

As described above, in the present invention, hot air is dispersed downward as a hair dryer in the dryer using the recovered steam to directly heat the food waste to the efficiency, thereby lowering the steam temperature supplied to the dryer, Carbonization can be prevented, and the drying efficiency can be increased by increasing the drying speed.

10: input port
11: Outlet
12: dryer body
13: hollow shaft
14: Disc
15: disk rotating body
16:
17: Steam inlet
18: Shaft flange
19: Steam jacket
20: Double rotary valve
21: Steam piping
22: Main pipe
23: Subpipe
24: Air hole
25: Disk air supply
26: Air piping
27: Metal filter
28: Metal ball
29: Air pipe
30: air jet nozzle
31: Jacket air supply
32: Cover
33: Bearings
34: drain pipe
35: Paddle
36: Air outlet
37: Steam outlet
38: seal member
39: steam inlet
40: Air inlet

Claims

A dryer main body 12 having a charging port 10 for charging food waste before drying and a discharge port 11 for discharging food waste after drying;
And a plurality of discs 14 are formed on the outer circumferential surface of the hollow shaft 13 and are heated by the steam supplied to the inside of the dryer body 12 to dry the food waste A disk rotating body (15) for stirring the rotating disk;
A driving device 16 connected to the rear end of the hollow shaft 13 in the disk rotating body 15 to rotate the disk rotating body 13;
A steam jacket 19 having a steam inlet 17 and a drain pipe 34 for supplying and discharging steam and surrounding the periphery of the dryer body 12;
, &Lt; / RTI &
A pipe is provided inside the hollow shaft 13 and inside the disk 14 to supply air through the pipe so that the air supplied through the pipe is supplied in a heated state by the steam in the hollow shaft ,
A main pipe 22 provided along the inner axial line of the hollow shaft 13 and supplied with air from the outside and a main pipe 22 branched from the main pipe 22 to supply air to the inside of the disk rotating body 15, And a plurality of sub pipes 23 extending to the inside of the disk 14 so that air supplied through the main pipe and the sub pipe can be introduced into the dryer body through the air holes 24 formed in the disk And a disk air supply device (25)
The front end of the main pipe 22 extends outward from the dryer body 12 and is connected to the jacket air pipe 26 via the double rotary valve 20,
A metal filter (27) and a metal ball (28) are built in the sub pipe (23) at an end adjacent to the disk side air hole (24)
A plurality of sub pipes 23 are attached to one disk 14 and air can be introduced into the dryer through a plurality of air holes 24 in the disk 14, A disc dryer.

The method according to claim 1,
The tip end of the hollow shaft 13 of the disk rotating body 15 extends outside the dryer body 12 and is connected to the steam pipe 21 via the double rotary valve 20, Wherein the disc-shaped article is a disc-shaped disc.

The method according to claim 1,
The disk 14 of the disk rotating body 15 is in the form of a hollow disk and has a structure in which a plurality of teeth are concentric with the shaft while passing through the center by a shaft and are disposed at regular intervals along the shaft axis Features a disc dryer.

delete

The method according to claim 1,
As the means for supplying the air to the lower side of the inside of the dryer body 12, there are provided an air pipe 29 installed along the inside of the steam jacket 19 to receive air, And a jacket air supply device (31) which is installed inside the dryer main body (12) and composed of an air jet nozzle (30) for jetting air.

The method of claim 9,
The plurality of air pipes 29 of the jacket air supply device 31 are arranged along the longitudinal direction of the dryer body in the space below the steam jacket 19 and are arranged along the circumferential direction of the dryer body Wherein the disc is disposed on the disc.

The method according to claim 1,
As means for supplying air to the inside lower side of the dryer body 12, a waste heat recovering device is provided outside the dryer body 12, and after heating the air using the waste heat recovering device, To the inner lower portion of the main body (12).