KR19990075116A - Screw Dryer for Food Waste Drying Treatment - Google Patents

Abstract

The present invention relates to a screw dryer for food waste drying treatment, wherein a large amount of leachate containing odors, including odors, is removed as a crushing compression means, and still contains a large amount of water. It is to provide a screw dryer for food waste drying treatment in which the food waste is fed and transported into the dryer and the food waste being transported is supplied with steam heat and drying hot air so that the food waste is dried by the steam heat and drying hot air. .

Description

Screw Dryer for Food Waste Drying Treatment

The present invention relates to a screw dryer for food waste drying treatment, and more particularly, to a food dryer drying treatment screw dryer capable of transporting food waste into the dryer and simultaneously supplying steam heat and drying hot air to dry food waste. It is about.

In general, food waste refers to food waste discharged from restaurants and homes, and agricultural, water, and livestock waste generated during the production, distribution, processing, and cooking of food. Most of the food waste components include leachate, water, and water. It consists of a back, accompanied by a bad odor.

Currently, the disposal of food wastes discharged as described above is mostly landfilled in landfills containing leachate, etc., so that the leachate of the landfilled food waste is absorbed into the landfill soil, causing severe odor and polluting the soil. .

As a result, a sanitary landfill was installed on the bottom surface to allow leachate, such as food waste, to flow to a certain reservoir, but leachate flows through the embankment around the curtain and flows into nearby rivers. If polluting hazards are generated and food waste is left untreated in rivers and mountains instead of in landfills, environmental pollution is further increased.

In addition, although the policy to use food waste as a resource, that is, composting, feed, and fuel is being implemented, the following problems have occurred.

When the food waste is put into a composting container for fermentation and used as a plant compost, the fermented food waste contains salt and heavy metals as it is, which causes harm to plants.

Although the plant was established to feed food waste for the feed, the wastewater was generated according to the food waste feed process, and the measurement of BOD and COD of the waste water was 2000ppm and 1000ppm, which exceeded the allowable limit of 120ppm by up to 17 times, respectively. This resulted in the increase of environmental pollution, and it was not suitable because it contained salinity to feed livestock food waste to livestock.

For the fuelization, once the household waste containing food waste is incinerated by incineration, the moisture of the food waste lowers the incineration temperature, and when incinerated, harmful components such as dioxins are generated.

In addition, although the amount of food waste can be reduced by using the apparatus for reducing food waste, there was a limit in reducing food waste only by the function of simple compression in which water is not completely removed.

As described above, the problem caused by the leachate of food waste is very serious. To solve this problem, the food waste containing a large amount of leachate must first be dried. The reason for this is that drying removes leachate and residual water, including the salinity of food waste, the ultimate source of contamination.

Therefore, it is easy to landfill without contamination of leachate, can be used as raw material and compost of compound feed, and since the food waste is dried, it improves the combustion conditions of the incinerator that incinerates and fuels the food waste and dioxin. It can reduce the harmful gas such as and increase the amount of heat generated.

Accordingly, there is an urgent need for an efficient food waste drying treatment dryer for drying the food waste.

The present invention has been made in order to dry the food waste in view of the above problems, once the food waste in the state of removing a large amount of leachate containing odor by the crushing compression means is still a state containing a lot of water, A food waste drying screw which feeds and transports the food waste in the moisture state into the dryer and supplies the steam heat and the drying hot air to the food waste being transported, thereby drying the food waste by the steam heat and the drying hot air. The purpose is to provide a dryer.

1 is a cross-sectional view showing a screw dryer for food waste drying treatment according to the present invention;

2 is a longitudinal sectional view showing a screw dryer for food waste drying treatment according to the present invention;

3 is a partially enlarged cross-sectional view showing a screw portion of the screw dryer for food waste drying treatment according to the present invention.

<Explanation of symbols for the main parts of the drawings>

10: Screw without shaft 12: Feed hopper

14: 3-stage housing 16: rotary feed unit

18: outlet 20: drive motor

22a: Dry hot air supply piping 22b: Dry hot air discharge piping

24a: steam heat supply pipe 24b: steam heat discharge pipe

30: first space 31: second space

32: third space 33: upper closed partition space

34: Lower sealed partition 40: Fixed-value transfer valve

41: injection part 42: rotary valve

43: discharge part 44: guide version

100: screw dryer

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

Screw dryer for food waste drying treatment of the present invention is divided into the first space 30, the second space 31, the third space 32 in the longitudinal direction and flows out into the input hopper 12 and the lower one side in the upper one side. The three-stage housing 14 in which the portion 18 is formed, and the inner spaces 30, 31, and 32 of the three-stage housing 14, respectively, are vertically sealed spaces 33 and 34. A guide plate 44 which is mounted in a manner of forming a shaft, a shaftless screw 10 which is rotatably inserted without being attached to an upper surface of the guide plate 44, and a shaftless inserted into the guide plate 44. The dry hot air supply pipe 22a and the dry hot air discharge pipe 22b, which are mounted to supply and discharge the dry hot air to the sealed partition space 33 above the screw 10, and the bottom sealed partition space of the guide plate 44 ( 34, the steam heat supply pipe 24a and the steam heat discharge pipe 24b, which are mounted to supply and discharge steam heat, and the first hole of the three-stage housing 14. At one end of the liver 30, the rotary feeder 16 is mounted to one end of the second space 31 so that the input material is transferred to the third space 32 so that the input material is transferred to the second space 31, respectively. It characterized in that it consists of a drive motor 20 mounted on the outer surface of the three-stage housing 14 to drive the shaft 10 without a shaft.

In particular, the guide plate 44 is formed in two concave semicircular shapes so that the screwless screw 10 is inserted without being in close contact.

The lower end of the input hopper 12 in contact with the first space 30 of the three-stage housing 14 is equipped with a fixed quantity transfer valve 40 for continuous quantitative transfer of the input material.

The present invention is described in more detail as follows.

1 is a cross-sectional view showing a screw dryer for food waste drying treatment according to the present invention, and reference numeral 14 denotes a three-stage housing 14 of the screw dryer 100.

The interior of the three-stage housing 14 is formed by dividing the first space 30, the second space, and the third space in the longitudinal direction.

In addition, a funnel-type input hopper 12 is formed at one side of the upper surface of the three-stage housing 14, and an outlet 18 is formed at one side of the bottom surface.

The lower end of the input hopper 12 communicated with the first space 30 is equipped with a fixed amount transfer valve 40, the food waste introduced into the input hopper 12 is the fixed amount transfer valve 40 Is always transported quantitatively to the first space 30

In this case, the first space 30, the second space 31, and the third space 32 are further divided up and down, and two concave semicircular guide plates 44 are formed in the respective spaces ( 30, 31 and 32 are integrally mounted in the longitudinal direction so as to be divided up and down, the upper sealed partition 33 and the lower sealed partition 34 are formed.

Here, the shaftless screw 10 is rotatably inserted into the concave portion formed on the upper surface of the guide plate 44 installed in the first space 30, the second space 31, and the third space 32, respectively. In addition, the drive motor 20 is mounted on an outer side surface of the three-stage housing 14 corresponding to the spaces 30, 31, and 32 of the three-stage housing 14 for rotational driving of the shaftless screw 10. do.

Therefore, the food waste of the leachate containing the odor is removed into the input hopper 12 of the three-stage housing 14 bar, the food waste is the first space (by the fixed amount transfer valve 40) 30) is always transported quantitatively.

As described above, the food waste transported to the first space 30 in a quantitative manner is transported along the shaftless screw 10 that drives the rotation.

On the other hand, the food waste transported as described above in the first space 30 is rotated conveying unit 16 in communication with the second space 31 at the end of the first space 30 to be transported to the second space 31. ) Is mounted, and at the end of the second space 31, the same rotary feeder 16 is mounted to communicate with the third space 32.

The rotary feeder 16 has an inlet 41 formed at an upper portion thereof, a rotary valve 42 is installed at the center to quantitatively transport food waste, and a discharge portion 43 formed at the lower portion thereof.

Accordingly, the food waste being transported in the first space 30 enters the input portion 41 of the rotary conveying portion 16 and is discharged to the lower discharge portion 43 in a fixed amount by the internal rotary valve 42. The food waste is conveyed to the second space 31, and the food waste is subsequently transported along the shaftless screw 10 of the second space 31, and the third space 32 is passed through the rotary feeder 16 at the end thereof. ) And at the same time exit the outlet 18 along the screwless screw 10 of the third space 32.

The drying process of the food waste transported in the screw dryer 100 as described above is as follows.

The screw dryer 100 is equipped with dry hot air supply and discharge pipes 22a and 22b and steam heat supply and discharge pipe lines 24a and 24b.

In more detail, the drying hot air is supplied to the upper spaced divided space 33 of the first space 30, the second space 31, and the third space 32 of the three-stage housing 14 so as to supply dry hot air. However, a dry hot air supply pipe 22a is mounted on the surface of the housing 14, and a dry hot air discharge pipe 22b is connected to a predetermined portion on the opposite side so that the dry hot air exits the drying process.

In addition, the three-stage housing corresponding to the steam heat is supplied to the lower sealed partition space 34 of the first space 30, the second space 31, the third space 32 of the three-stage housing 14 ( On the surface of 14), the steam heat supply pipe 24a is mounted, and the steam heat discharge pipe 24b is connected and mounted at a predetermined portion on the opposite side so as to escape the steam heat which has been completed.

Therefore, the food waste is transported by the drying hot air and steam heat at the same time as the food waste is transported into the screw dryer 100 as described above. The screw 10 without the shaft is exposed in the upper sealed partition space 33. In other words, the food waste being transported along the sideless screw 10 is exposed, the dry hot air supplied from the dry hot air supply pipe 22a to the upper sealed partition 33 is the food in the exposed state. It is fed vertically in direct contact with the trash to dry the food waste.

In addition, the steam heat is also supplied from the steam heat supply pipe 24a to the lower sealed partition 34 at the same time as the drying hot air, and the steam heat is supplied to the bottom surface of the guide plate 44 to provide food waste. Not directly in contact with, the heat of vapor is conducted to the guide plate 44 at the same time is conducted to the food waste, the food waste is dried.

As described above, when the food waste is uniformly transported in the screw dryer 100 and dried at the same time, the food waste is discharged to the outlet 18 to be finally dried.

As described above, the dry state of the food waste which has been dried in the screw dryer 100 is a dry state having an equilibrium moisture content. The equilibrium moisture content is a constant water content which finally indicates a unique water retention state even when the material is dried. This is called the equilibrium moisture content. Therefore, the moisture that can be removed when the drying conditions such as temperature, humidity, etc. are determined in drying a material reaches an equilibrium moisture content.

On the other hand, the steam heat and the drying hot air is discharged to the steam heat discharge pipe 24b and the dry hot air discharge pipe 22b after finishing the drying process for the food waste, respectively.

In addition, the means for supplying steam heat may use the steam heat of the incinerator if incinerators for incineration of waste resources are adjacent, and other means may use a heat generating device such as an oil burner.

In addition, if the incinerator is adjacent to the supply means for the dry hot air, the steam heat from the incinerator is supplied to a normal heat exchanger, and the hot air sucked into the blower is a dry hot air simultaneously supplied to the heat exchanger supplied with the steam heat for heat exchange.

According to the food waste drying processing method and apparatus according to the present invention as described above, by drying up to the equilibrium moisture content of the food waste stabilization, it is easy to transport and store the dry stabilized food waste, and prevent the landfill of food waste directly It can be used as a fuel used in incinerators in terms of alternative energy, and can be used as a supplementary feed and compost because of the good quality of the dried state. Because of this, there is an advantage that the cost of the facility and maintenance is low.

Claims (3)

Screw dryer for food waste drying treatment is divided into the first space 30, the second space 31, the third space 32 in the longitudinal direction, the hopper 12 on the upper side and the outlet 18 on the lower side. ) Is formed in the three-stage housing 14, and the inner spaces 30, 31, 32 of the three-stage housing 14 again to form the upper and lower sealed partition spaces 33, 34 A guide plate 44 to be mounted, a shaftless screw 10 that is rotatably inserted without being attached to an upper surface of the guide plate 44, and a shaftless screw 10 inserted into the guide plate 44. ) In the upper sealed partition space 33 to the dry hot air supply pipe 22a and the dry hot air discharge pipe 22b, which are mounted to supply and discharge the dry hot air, and the bottom sealed partition space 34 of the guide plate 44. One side of the first space 30 of the three-stage housing 14 and the steam heat supply pipe 24a and the steam heat discharge pipe 24b which are mounted to supply and discharge steam heat. At one end of the second space 31 so that the input material is transferred to the second space 31 at the end thereof, a rotational transfer part 16 mounted to be transferred to the third space 32 and the respective screw without a shaft ( Screw dryer for food waste drying treatment, characterized in that consisting of a drive motor (20) mounted on the outer surface of the three-stage housing (14) to rotate the 10. The screw dryer of claim 1, wherein the guide plate (44) is formed in two concave semicircular shapes so that the shaftless screw (10) is inserted without being in close contact. According to claim 1, wherein the lower end of the input hopper 12 in contact with the first space 30 of the three-stage housing 14, characterized in that the fixed quantity transfer valve 40 is mounted for continuous quantitative transfer of the input material Screw dryer for food waste drying treatment.