KR20210015352A - A drying apparatus for organic waste - Google Patents

Abstract

The present invention relates to a dryer for drying food waste with steam and, more specifically, to a dryer with an improved structure to quickly discharge moisture generated by condensation of steam. According to the present invention, the food waste dryer comprises: a cylindrical drying chamber (100) having an internal space for drying food waste; a steam supply pipe supplying steam to the inside of the drying chamber (100); a steam heating pipe (220) provided concentrically with respect to the drying chamber (100) so that the food waste inside the drying chamber (100) can be dried by the steam supplied by the steam supply pipe, and having a heating disk on the outer circumferential surface thereof to evenly transfer heat to the food waste put into the drying chamber (100); a driving motor for rotating the steam heating pipe (220); a condensate water discharge pipe (300) provided along the central axis of the steam heating pipe (220) to discharge condensate water; and an air discharge pipe (130) for discharging hot and humid air generated inside the drying chamber (100) to the outside. The steam heating pipe (220) is provided with a condensate water discharge means and a condensate water guide in the shape of a screw along the inner circumferential surface of the steam heating pipe (220).

Description

Food waste drying device {A DRYING APPARATUS FOR ORGANIC WASTE}

The present invention relates to a drying apparatus for drying food waste with high heat steam, and a structural improvement in which moisture generated by condensation of steam can be quickly discharged to the outside.

Recently, food waste is increasing rapidly due to the improvement of the quality of life. Such food waste is generally generated and discharged in large quantities at homes, catering centers, restaurants, etc., and the discharged food waste is added to or reprocessed to animal feed through a process of crushing and drying to turn it into a resource as feed, compost, etc.

However, since a general food waste dryer consumes a lot of energy, it has become an important task to increase energy efficiency. Various heat sources are used to increase the energy efficiency, but each heat source has its drawbacks, so the industry mainly supplies heat sources by steam.

Recently, a heat source using a carbon rod or a drying method using dry hot air has been applied, but a heat source supply method using steam is used as the most effective energy method. In particular, in order to be used as feed for animals, proper drying must be performed, but when a carbon rod is used, there is a problem that carbonization occurs due to local concentration of a heat source in a specific area.

However, the method of supplying a heat source by steam also has a problem, and the steam generates condensed water in the process of drying food waste, and effectively removing the condensed water generated inside the drying chamber remains a problem to be solved.

Accordingly, the inventor of the present invention has improved the problem of lowering the thermal efficiency due to the condensed water by supplying steam to the steam heating tube provided inside the drying chamber and removing condensed water generated during the heating process conveniently and quickly.

Prior Document 1: Korean Patent Laid-Open Publication No. 10-2012-0035540 (published on April 16, 2012)

An object of the present invention is to provide a drying apparatus capable of rapidly discharging condensed water formed in a steam heating pipe having a hollow heating ring on the outer periphery in a food waste drying apparatus for drying with high heat steam.

The present invention provides a drying apparatus capable of remarkably improving drying efficiency by allowing the condensed water generated by condensing the high heat steam of the hollow heating ring to be quickly discharged to the outside without flowing back through the steam heating tube back into the hollow heating ring. It is aimed at.

The present invention for solving the above technical problem

In the food waste drying device,

A normal drying chamber 100 having an internal space for drying food waste;

The drying chamber 100 is supported and rotated at both ends of the drying chamber 100 so as to transfer the heat of the steam to dry the food waste inside the drying chamber 100 by receiving external steam, and inside the drying chamber 100 A steam heating tube 220 having a hollow heating ring 230 on the outer peripheral surface of the steam heating tube 220 continuously along the longitudinal direction in order to evenly transfer heat to the input food waste;

A driving motor that rotates the steam heating tube 220;

A condensate discharge pipe 300 for discharging condensed water from the steam heating pipe 220 while being connected to the outside along a central axis of one end of the steam heating pipe 220 and rotating;

Including; an air discharge pipe 130 for discharging the hot and humid air generated inside the drying chamber 100 to the outside,

The inside of the steam heating pipe 220 has a screw shape having a predetermined height along the inner circumferential surface of the steam heating pipe 220 to transfer the condensed water generated by heating food waste and condensing the cooled steam toward the condensate discharge pipe 300. It characterized in that the condensed water guide 221 is provided.

Preferably, a through hole 224 through which steam or condensed water moves is formed between the steam heating tube 220 and the hollow heating ring 230, wherein the through hole 224 is condensed water on the inner circumference of the steam heating tube 220 It is provided with a backflow prevention pipe (225).

On the other hand, the condensed water discharging means is provided with an upper cover on the condensed water guide 221 provided at the end of the steam heating pipe 220 to guide the condensed water collected in the space formed by the upper cover and the condensed water guide to the condensed water discharge pipe 300 A condensate guide pipe 223 is connected between the upper cover and the condensate discharge pipe.

In the present invention, in a drying apparatus for drying food waste with steam, a condensed water guide is continuously formed from one side of the inner wall of the steam heating pipe 220 to the other side, so that the condensed water is discharged with the rotation of the steam heating pipe 220 Can be transferred to.

In the present invention, a condensed water discharge pipe concentric with the central axis of the steam heating pipe 220 is provided at the side end of the steam heating pipe 220, and the condensed water of the condensed water guide is discharged through the discharge pipe, And since reliable discharge is possible, the thermal efficiency is remarkably improved.

1 is a cross-sectional view of a food waste dryer according to the present invention
Figure 2 is an enlarged cross-sectional view of a portion A of the condensate discharge port 120 of Figure 1
3 is a view showing the principle of discharging condensed water according to the present invention
4 is a view showing a condensate backflow prevention structure of the steam heating pipe 220 according to another embodiment of the present invention
5 is a side photograph of a hollow heating ring of a general steam food waste dryer

The present invention is largely composed of a conventional drying chamber 100, a steam heating unit 200, and a condensate discharge pipe 300. In particular, the steam heating unit 200 includes the steam heating pipe 220 holding the steam supplied from the steam injection pipe 210, and a hollow heating ring continuously disposed along the longitudinal direction on the outer peripheral surface of the steam heating pipe 220 ( 230) is provided. The steam inside the steam heating pipe 220 is connected to the hollow heating ring 230 and is circulated along the hollow heating ring 230, so that it is possible to transfer heat evenly from the food waste. That is, the hollow heating ring 230 can quickly and evenly dry food waste by increasing the surface area for transferring heat.

Hereinafter, it will be described in detail based on FIG. 1.

Steam heating arranged to circulate the steam injected from the steam injection pipe 210 inside the drying chamber 100 and a steam injection pipe 210 supplying steam into the drying chamber 100 of a common (筒狀) Condensed water for discharging the condensed water generated by drying the food waste inside the drying chamber 100 with heat of steam and condensing the steam by heat exchange to the outside. It is provided with a discharge pipe (300).

More specifically, the drying chamber 100 is provided with an inlet 110 for injecting non-dried food waste into the top of one side, and the dried food waste is discharged at the bottom of the other side of the drying chamber 100. A discharge port 120 is provided.

The heating means for heating the inside of the drying chamber 100 may be variously selected, but the present invention is based on a steam type drying apparatus that supplies steam.

The steam heating unit 200 includes the steam heating pipe 220 holding the steam supplied from the steam injection pipe 210, and a hollow heating ring continuously disposed on the outer peripheral surface of the steam heating pipe 220 along the longitudinal direction. ) 230 is provided. The steam inside the steam heating pipe 220 is in communication with the hollow heating ring 230 on the outer periphery, so that the steam is circulated to the hollow heating ring 230 so that heat can be evenly transferred to the food waste. That is, the hollow heating ring 230 can quickly and evenly dry food waste by increasing the surface area for transferring heat.

In particular, steam is supplied from an external boiler and injected into the rotating steam heating tube 220 inside the drying chamber 100. That is, the steam injected into the steam heating tube 220 is supplied to the inside of the steam heating tube 220 concentrically penetrating the inside of the drying chamber 100. Therefore, the steam supplied from the outside does not come into direct contact with food waste. The food waste is put into the space between the drying chamber 100 and the steam heating tube 220 and is heated and dried by the steam heating tube 220 and the hollow heating ring 230 provided on the outer circumferential surface thereof.

The steam heating pipe 220 has a shape of a hollow shaft, and external steam injected from the steam injection pipe 210 flows into the hollow heating ring 230 from the inside of the steam heating pipe 220. The steam heating tube 220 is provided with a hollow heating ring 230 at regular intervals along its outer circumferential surface, and thus is used as drying energy of food waste.

A structure for discharging condensed water will be described with reference to FIGS. 2 and 3.

A through hole 224 is formed between the steam heating tube 220 and the hollow heating ring 230, so that steam is introduced into the hollow heating ring 230 and circulated, and flows into the hollow heating ring 230 The generated steam heats and condenses the food waste outside. The condensed water generated from the steam flows out from the rotating hollow heating ring 230 and is collected in the steam heating tube 220 again. And the condensed water collected in the steam heating pipe 220 is transferred in the direction of the condensate discharge pipe 300 along the condensate water guide 221 provided in a spiral shape on the inner circumference of the rotating steam heating pipe 220, It is visible near the end, that is, the condensate discharge pipe 300. Accordingly, a guide cover 222 is provided at the end of the condensed water guide 221 to collect the transferred condensed water. Condensed water is collected in the space formed at the end of the condensed water guide 221 and the guide cover 222 covering the same, and there is steam between the guide cover 222 and the condensed water discharge pipe 300 in order to guide it to the condensate water discharge pipe 300. The condensate guide pipe 223 is connected in the radial direction of the heating pipe 220. As the steam heating pipe 220 rotates, the condensed water is transferred along the condensed water guide 221 and flows out to the condensed water discharge pipe 300 along the condensed water guide pipe.

As described above, between the steam heating tube 220 and the hollow heating ring 230, a through hole 224 through which steam or condensed water enters and exits is formed, and preferably, a steam heating tube 220 in the through hole 224 It is characterized in that a non-return pipe 225 having a predetermined length in the radial direction is provided inside. That is, the steam of the steam heating tube 220 flows into the hollow heating ring 230 through the backflow prevention tube, and the steam inside the hollow heating ring 230 is converted to condensed water after heat exchange is completed. Condensed water flows back into the steam heating tube 220 along the through hole 224 located at the top according to the rotational position of the steam heating tube 220. Accordingly, the steam heating pipe 220 rotates and the condensed water is transferred along the condensate guide 221 toward the condensate discharge pipe 300, and at this time, it should not be introduced into the hollow heating ring 230 again through the through hole 224. do. A non-return pipe 225 as described above is required so that condensate does not flow back into the hollow heating ring 230.

4, the backflow prevention pipe 225 is connected to the through hole 224 formed along the hollow heating ring 230 on the inner peripheral surface of the steam heating pipe 220. It is protruded to have a predetermined length. The predetermined length is suitable as long as it is similar to or slightly higher than the height of the spiral condensate guide installed on the inner peripheral surface of the steam heating pipe.

The condensed water discharge pipe connected to the end center of the steam heating pipe 220 at the discharge-side end center of the drying chamber 100 allows condensed water guided along the condensate guide pipe 223 to be discharged to the outside. One end of the condensed water discharge pipe concentrically installed in the steam heating pipe is sealed, and the other end is connected to a drain outside the steam heating pipe. The outer peripheral surface of the condensed water discharge pipe at the sealed end is directly connected to the condensate guide pipe so that the condensed water collected in the space between the condensate guide and the guide cover flows. The condensed water introduced therein is discharged to the outside along the condensed water discharge pipe.

The condensate discharge pipe 300 is preferably integrally fixed to rotate together with the steam heating pipe 220. The condensate guide pipe 223 of the steam heating pipe 220 rotates integrally or independently with the condensate discharge pipe 300, but due to the synchronization and rotation, the condensate water of the steam heating pipe goes to the outside at any rotation position of the steam heating pipe Guided and discharged.

In addition, the condensed water discharge pipe 300 is supported by a bearing 310 and rotated in association with the steam heating pipe 220 by a driving motor.

Separately, a separate heating jacket is provided on the outer circumferential surface of the drying chamber 100 to increase drying efficiency, but the points having a condensate trap that opens the steam discharge pipe only when the condensate is discharged are commonly applied, and the structure and operation thereof The description of is omitted. In addition, it is natural that an air discharge pipe 130 for discharging the high temperature and high humidity air generated inside the drying chamber 100 to the outside is separately provided.

100: drying chamber
110: inlet
111: input cover, 112: discharge cover
120: outlet
130: air discharge pipe
200: steam heating unit
210: steam injection pipe
220: steam heating pipe
221: condensate guide
222: guide cover
223: condensate guide pipe
224: through hole
225: backflow prevention pipe
230: hollow heating ring
300: condensate discharge pipe
310: bearing

Claims (3)

In the food waste drying device,
A normal drying chamber 100 having an internal space for drying food waste;
The drying chamber 100 is supported so as to be rotated at both sides of the inside of the drying chamber 100, the outer peripheral surface along the longitudinal direction of the steam heating tube 220 to evenly transfer the heat of the steam to the food waste injected into the drying chamber 100 Steam heating tube 220 having a hollow heating ring 230;
A driving motor that rotates the steam heating tube 220;
Concentrically installed along a central axis of one end of the steam heating pipe 220 and connected to the outside, a condensate discharge pipe 300 for discharging the condensed water of the steam heating pipe 220; including,

The inside of the steam heating tube 220 heats food waste and transfers the condensed water generated by condensing the cooled steam toward the condensate discharge tube 300, and has a spiral shape on its inner circumferential surface along the longitudinal direction of the steam heating tube 220. Food waste drying apparatus, characterized in that the condensed water guide (221) is provided.
The method of claim 1,
A through hole 224 through which steam or condensed water moves is formed between the steam heating tube 220 and the hollow heating ring 230, the through hole having a backflow prevention tube 225 on the inner circumference of the steam heating tube 220 Food waste drying device, characterized in that.
The method according to any one of claims 1 to 3,
The condensed water discharging means is provided with a guide cover on the condensed water guide 221 provided at the end of the steam heating pipe 220, and the condensed water collected in the space formed by the condensed water guide 221 and the guide cover 222 is transferred to the condensed water discharge pipe ( A food waste drying apparatus, characterized in that the condensate guide pipe 223 for guiding to 300) is connected to the inlet of the condensate discharge pipe 300.

Images