KR100357965B1 - apparatus for drying water-containing wastes - Google Patents

Abstract

The present invention provides a novel water-containing waste drying apparatus capable of efficiently and reliably drying waste containing a large amount of water. The drying apparatus of the present invention comprises a heating mixer (1) for hot air drying the waste water, a hopper (2) for pulverizing the waste water into the heating mixer (1), and drying waste discharged from the heating mixer (1). Cooling lifter 3 for air cooling, the distributor 4 which takes out the dry waste discharged | emitted from this cooling lifter 3, and returns a part of it to the said hopper 2 side, and the hot air in the heating mixer 1 It is comprised by the deodorization means 5 which supplies and deodorizes the hot air at the same time.

Description

Apparatus for drying water-containing wastes}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-based waste drying apparatus for effectively drying water-containing waste containing a large amount of water such as food waste, sludge, sludge, chicken dung, etc. discharged from food factories, restaurants, and common houses. .

Recently, food wastes from food factories, restaurants and apartment houses, and water-containing wastes containing a large amount of water such as sludge, sludge, and chicken dung are increasing year by year. The deterioration of the environment is causing a number of serious problems.

Therefore, for example, as disclosed in Japanese Unexamined Patent Publication No. 3-285035, a food waste drying apparatus has been proposed for dehydrating and drying food wastes in advance to reduce their consumption and reduce their weight. .

As shown in Fig. 5, the food waste drying apparatus includes a hopper a for introducing food waste, a conveying mechanism b for crushing and conveying the food waste fed into the hopper a, and the conveying mechanism ( b) a drying container (c) for stirring and drying the food waste conveyed in b) with high temperature hot air, a deodorizing furnace (d) for deodorizing the odor generated while supplying hot air into the drying container (c), and the deodorizing furnace It consists of heat exchangers (e, f) which effectively utilize the heat generated in (d), and a blower (g) which supplies hot air into the drying container (c). The amount of food waste was greatly reduced and reduced.

That is, as shown, the food waste put into the hopper (a) is conveyed in the drying container (c) while being crushed by the conveying mechanism (b), and then blown while stirring with the stirring blade (h) in the drying container (c) It is dehydrated and dried by hot air sent from (g). As a result, the food waste is greatly reduced in capacity, then taken out from the drying container (c) as a dry waste, filled in a bag, recovered, and effectively reused as a fertilizer or animal feed.

On the other hand, since the hot air sent into the drying container c is an exhaust gas containing a large amount of moisture and malodorous components by drying the food waste, it cannot be released into the atmosphere as it is. Therefore, the exhaust gas discharged from the drying vessel (c) is first separated from water and solid particles in the filter (i), heated in the heat exchanger (f), and then sent to the deodorization furnace (d), where the burner ( As it is combusted as combustion air of j), the odor component contained is burned and becomes odorless harmless combustion exhaust gas. After that, the hot combustion exhaust gas discharged from the deodorizing furnace (d) heats the air sent from the blower (g) when passing through the second heat exchanger (e), and then passes through the heat exchanger (f) again. After the heat exchange with the exhaust gas which is sequentially exhausted from the drying vessel (c) side and the temperature is lowered again, it is released into the atmosphere.

However, the conventional food waste drying apparatus having such a configuration has a problem that the treatment efficiency is not satisfactory because it is a batch method.

In other words, in the configuration of the device, the drying container (c) is opened by removing the drying container (c) after each drying operation, but the drying container (c) and food waste immediately after the stop are kept at a very high temperature. In order to safely take out the food waste after drying, not only has to wait until the inside of the drying container (c) is naturally cooled, but the drying treatment efficiency was not high. Therefore, a method of forcibly cooling the inside of the drying container (c) by stopping the burner (j) and introducing cold air from the blower (g) may be included in the inside of the drying container (c) and food waste. Since the odor component is released into the atmosphere without being thermally decomposed by combustion, there is a problem that odor is diffused around.

In addition, when treating a kind of food waste, for example, a moist residue, etc., the residue is aggregated inside the drying vessel (c) and stuck to the inner wall surface or the stirring blade (h) of the drying vessel (c). As a result, not only the drying efficiency is deteriorated but also the removal work requires a lot of effort.

The present invention has been devised to effectively solve the above problems, and an object thereof is to provide a novel water-containing waste drying apparatus capable of efficiently and reliably drying a large amount of water waste.

The above and other objects of the present invention can be achieved by the present invention described below.

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

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an overall configuration diagram showing a first embodiment of a waste water drying apparatus according to the present invention.

FIG. 2 is a partially enlarged view illustrating a portion A in FIG. 1.

3 is an overall configuration diagram showing another embodiment of the water-containing waste drying apparatus according to the present invention.

4 is a partially enlarged view illustrating a portion A in FIG. 3.

5 is a schematic view showing an example of a conventional food waste drying apparatus.

Brief description of the main symbols in the drawings

1: heating mixer 2: hopper

3: cooling lifter 4: distributor

5: Deodorization means 6: Mixer casing

In order to solve the above problems, the present invention provides a heating mixer which is dried by hot air while stirring and conveying water waste, a hopper which is injected while grinding water waste into the heating mixer, and air-cooled while conveying dry waste discharged from the heating mixer. A conveyor cooling lifter, a dispenser which takes out the dry waste discharged from the cooling lifter, returns a part of the dry waste to the hopper side, supplies hot air into the heating mixer and deodorizes the hot air. It is composed of deodorizing means.

That is, water-containing wastes having high moisture content, such as food waste, sludge, sludge, and chicken dung, are dried by hot air supplied from a deodorizing means while being stirred and conveyed in a heating mixer, and after being turned into a dry waste, are introduced into a cooling lifter, where they are air-cooled. After discharge, it is discharged through the distributor. If there is a concern that water-containing waste may stick to the inside of the heating mixer according to its type, return some of the dry waste introduced into the distributor and mix it with water-containing waste to lower the moisture content of the inlet of the heating mixer. Sticking phenomenon can be suppressed beforehand.

On the other hand, the hot air discharged from the heating mixer flows into the deodorizing means side, and the odor component contained therein is thermally decomposed by the combustion to be deodorized and then released into the atmosphere.

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

1 is an overall configuration diagram showing a first embodiment of a water-containing waste drying apparatus according to the present invention.

As shown, the water-containing waste drying apparatus of the present invention has a heating mixer 1 for drying by hot air while stirring and conveying water-containing waste from the loading end to the carrying-out side, and the water-containing waste drying apparatus 1 at the loading end side of the heating mixer 1. At the hopper 2 which throws in the crushing waste, the conveyor type cooling lifter 3 which air-cools while conveying the dry waste discharged | emitted from the carrying out end of the said heating mixer 1, and the carrying out end of this cooling lifter 3, A dispenser (4) for taking out the discharged dry waste and returning a part of the dry waste to the grinding input hopper (2) side, and supplying hot air to the inside of the heating mixer (1) and at the same time the heating mixer (1) Deodorizing means (5) for deodorizing the exhaust gas discharged from the.

The heating mixer 1 includes a mixer casing 6 on a drum provided in a horizontal direction, a rotating shaft 7 rotatably provided on an axis portion of the mixer casing 6, and a drive motor for driving the rotating shaft 7 ( 8) and a plurality of stirring blades 9 radially provided around the rotary shaft 7, and conveyed the food waste fed from the grinding input hopper 2 to the carrying out side while stirring with the stirring blade 9. At the same time, by drying the water-containing waste by the hot air supplied from the hot air inlet 10 provided on the carry-in end side to generate a dry waste. As shown in Fig. 2, the stirring blade 9 is composed of an arm 11 connected to the rotary shaft 7 and a stirring plate 12 provided at its tip, and the stirring plate 12 is armed. It is attached obliquely to the tip of (11) and acts to extrude the hydrous waste to the carrying out side while stirring.

The hopper 2 is composed of a hopper casing 13 for feeding food waste, and a crusher 14 provided at a connection portion between the hopper casing 13 and the carry-in end of the heating mixer 1, and the hopper casing ( 13) The food waste put into 13) is continuously quantitatively supplied to the carrying-in end side of the heating mixer 1 while crushing finely with the grinder 14.

The cooling lifter 3 has a conveyor casing 16 with its carry-out side connected to a dry waste outlet 15 provided at the carry-out end of the heating mixer 1, with its carry-out side set up obliquely upward, and this conveyor casing 16 ) Belt conveyor 17 installed in the inside of the conveyor belt, a dry waste discharge port 18 provided at the discharging end of the conveyor casing 16, and an air supply port 19 for supplying cooling air (atmosphere) into the conveyor casing 16. And an exhaust port 20 for exhausting the injected cooling air, and after cooling the dry waste discharged from the dry waste outlet 15 of the heating mixer 1 to the carrying out end side from the belt conveyor 17, The dry waste discharge port 18 is discharged to the distributor 4 side. In addition, rotary valves 22 and 23 are installed at the dry waste discharge port 18 and the dry waste inlet port 21 of the cooling lifter 3, respectively, to cool the dry waste discharge port 18 and the dry waste inlet port 21. The inside of the conveyor casing 16 is sealed so that air does not leak.

The distributor 4 is connected through a rotary valve 23 of the dry waste discharge port 18, and discharges the dry waste cooled by the cooling lifter 3 as dry matter, and at the same time, a line 24 which arbitrarily returns a part thereof. Return to the hopper (2) side through.

Deodorizing means 5 is a circulation line 25 for connecting between the exhaust port 20 of the cooling lifter 3 and the hot air inlet 10 of the heating mixer 1, and the exhaust port 35 of the heating mixer 1 ) And a first heat exchanger (28) provided at the intersection of the exhaust line (26), the deodorization passage (27) provided at the exhaust line (26), and the circulation line (25) and the exhaust line (26). ) And a second heat exchanger (29), blowers (30, 31) installed in the circulation line (25) and the exhaust line (26), respectively, to deodorize the exhaust gas discharged from the heating mixer (1). It is made to generate | occur | produce hot air supplied into the heating mixer 1 at the same time as it discharge | releases to the inside. In the figure, 32, 33, and 34 are filters for filtering air and the like passing through the respective lines 25 and 26.

Next, the operation of the water-containing waste drying apparatus of the present invention configured as described above will be described.

As shown, first, the waste water (raw material) introduced into the hopper 2 is finely pulverized in the crusher 14 and quantitatively injected into the input end side of the heating mixer 1, and then the main body of the mixer by the stirring blade 9 ( 6) The water is dehydrated by hot air (over 200 ° C.) flowing from the hot air inlet 10 when it is conveyed to the carry-out side with stirring in the inside, and is almost completely dried until reaching the carry-out side. Accordingly, it is possible to easily reduce and reduce the amount of water-containing waste containing a large amount of water, for example, vegetable debris and residues. In the heating mixer 1, the drying rate of the water-containing waste can be easily adjusted by appropriately adjusting the temperature of the hot air, the flow rate, the input amount of the water-containing waste, the conveying speed and the like.

Next, the water-removed waste from which moisture has been removed as described above becomes dry waste and is carried in the cooling lifter 3 through the rotary valve 22 at the dry waste outlet 15 on the carrying out side and carried in by the belt conveyor 17. After being cooled to the dry waste outlet 18 side of the discharging end from the air supply port 19 and cooled to room temperature by the cooling air introduced into the conveyor casing 16, the dry waste outlet 18 is moved to the distributor 4 side. Discharged. Thereby, it is possible to take out, while cooling high temperature dry garbage effectively, without stopping the heating mixer 1 completely. In other words, when the high-temperature dry waste is discharged to the air as it is, moisture in the air due to cooling condenses on the dry waste, thereby increasing the water content.

At this time, when the waste water contains a lot of moisture, for example, residues or the like may aggregate in the heating mixer 1, a part of the dry waste discharged is returned to the return line 24 by the distributor 4. Return to the hopper 2 at and mix. Thereby, since the moisture content of the waste water thrown in the heating mixer 1 falls, it is possible to suppress the sticking phenomenon which arises in the heating mixer 1 beforehand.

On the other hand, the hot air supplied into the heating mixer 1 dries the waste water, and after a certain temperature drops, the hot air is sucked from the exhaust port 35 to the exhaust line 26 by the blower 31, and the second heat exchanger 29 After reheating, it is introduced into the deodorizing furnace 27 and used as combustion air, and then heat is recovered from the first heat exchanger 28 and the second heat exchanger 29 to be released into the atmosphere. Therefore, even if the odor component is mixed in the hot air (low temperature) exhausted from the heating mixer 1, since the odor component is thermally decomposed in the deodorization furnace 27, the odor component is not released into the air as it is. In particular, when the raw material (functional waste) is sludge, sludge, chicken dung, etc., rather than food waste, the deodorizing effect is very effective. In addition, since the deodorization path 27 uses not only cold air in the air as combustion air but also hot air with a certain amount of residual heat as combustion air, it is easy to obtain a high temperature combustion exhaust gas even during a cold season in winter. It is possible to achieve possible and excellent thermal efficiency.

On the other hand, the cooling air exhausted from the exhaust port 20 of the cooling lifter 3 cools the high temperature dry waste to become a certain high temperature, and is then sucked to the circulation line 25 by the blower 30, and the first heat exchanger. By passing through the 28, it is heated again to a high temperature to become hot air, and is reused as hot air supplied into the heating mixer 1. Therefore, the hot air used here does not use the air in the air as it is, but rather uses the air heated to some extent in the cooling lifter 3 to easily reach a high temperature, exhibits excellent thermal efficiency and at the same time deodorizes. In (27), the fuel consumption rate can also be reduced. In addition, this hot air does not contaminate food waste during drying because of its high cleanliness, and as a result, even if the raw material is food waste such as vegetable debris or residues, it is easy to use safe and high-quality products when the dry waste is used as feed for livestock. It is possible to get

Figure 3 shows another embodiment of the apparatus of the present invention. Although the basic structure is substantially the same as the above-mentioned water-containing waste drying apparatus of the present embodiment, the structure near the heating mixer 1 is slightly changed.

As shown in the drawing, the heating mixer 1 has an exhaust port 35 extending in the longitudinal direction on the upper surface side of the mixer casing 6 on the drum, and the hot air introduced from the circulation line 25 side as it is. It is to be sent upwards. In addition, the exhaust port 35 is provided with a filter 36 so as to block the exhaust port. The hot air exhausted from the exhaust port 35 is filtered to prevent the outflow of the dry waste (functional waste) in the mixer casing 6. In addition, the outlet end of the circulation line 25 for supplying the hot air into the mixer casing 6 is connected to the mixer casing 6 in a plurality of branches, and the hot air flowing from the circulation line 25 side is supplied to the mixer casing 6. It is made to flow in and to supply uniformly.

Therefore, in the heating mixer 1 having such a configuration, hot air supplied from the circulation line 25 is uniformly introduced into the mixer casing 6 to uniformly dry the internal waste water, and then exhaust from the upper exhaust port 35 as it is. Therefore, the flow of hot air is good and it is possible to exhibit excellent drying efficiency.

That is, in the case of the heating mixer 1 having the configuration shown in Fig. 1, the supplied hot air flows inside the mixer casing 6 from the carry-in end side to the carry-out end side. If the resistance is large and the water dehydrated at the carry-in side flows directly to the carry-out side with hot air, it may not be discharged in the middle, so that good drying may not be possible.

On the lower surface of the filter 36 shown in Fig. 4, a plurality of preventive plates 37 and 38 having a triangular cross section are provided at appropriate intervals along the exhaust port 35 in the transverse direction, respectively. To prevent spills.

That is, when the exhaust port 35 is formed on the upper surface of the mixer casing 6 as in the present embodiment, the dry waste in the mixer casing 6 is scattered toward the exhaust port 35 with hot air by the centrifugal force during stirring, and thus the filter ( 36), there is a possibility that a new problem occurs that the filter 36 is frequently clogged. Therefore, when the plurality of preventive plates 37 and 38 are installed on the lower surface of the filter 36 in advance as described above, after most of the dry waste scattered toward the exhaust port 35 collides with the lower surfaces of the preventive plates 37 and 38. Since it falls by self weight, it is possible to suppress the clogging of the filter 36 effectively. On the other hand, the hot air in the mixer casing 6 flows through the gap to the exhaust port 35 in spite of the presence of the prevention plates 37 and 38, and hardly affects the drying efficiency. In addition, by forming the barrier plates 37 and 38 in a cross-sectional triangle, the mixer casing slides off the inclined surfaces of the barrier plates 37 and 38 even when a part of the dry waste passed between the barrier plates 37 and 38 falls. (6) As it returns inside, it does not accumulate on the preventive plates 37 and 38.

When the heating mixer 1 is used, the hopper 2 for supplying the waste water may be directly attached to the inlet end side of the mixer casing 6 as shown in FIG. 1, but if it is attached through the screw feeder 39 as shown in FIG. Not only can accurate and quantitative water supply be supplied, but also the sealing property on the carry-in end side can be improved to effectively prevent the leakage of hot air on the hopper 2 side.

As shown in Fig. 3, when the inclined direction of the cooling lifter 3 is toward the hopper 2 side, it is possible to shorten the distance of the return line 24 of the dry waste and at the same time make the whole apparatus compact. At this time, the return line 24 may be supplied directly to the screw feeder 39 side rather than the hopper (2) side.

As the dry waste conveying means in the cooling lifter 3, a screw conveyor 40 may be employed as shown in place of the belt conveyor 17. In addition, the supply position of the cooling air supplied into the cooling lifter 3 is not limited to the top of the conveyor casing 16 as shown in FIG. 1 but can also be added to the lower side of the conveyor casing 16 as shown in FIG. Do.

As mentioned above, according to this invention, it is possible to exhibit the outstanding effect demonstrated below.

(1) Since the apparatus of the present invention can continuously perform a series of treatments such as drying, cooling, and discharging food waste, it is possible to exhibit superior processing capacity as compared with a conventional batch drying apparatus.

(2) Because the odorous components discharged with exhaust gas from the heating mixer are incinerated in the deodorizing furnace, the odorous components are not released into the atmosphere as they are, and thus do not cause deterioration of the surrounding environment.

(3) It is possible to mix some of the dry trash with the food waste before feeding, so that the sticking phenomenon in the heating mixer can be prevented in advance even in the food waste, which is easy to stick. .

(4) Since the heat of the combustion exhaust gas generated from the hot wind and the deodorization furnace discharged from the heating mixer can be effectively used, it is possible to achieve excellent thermal efficiency and energy saving effect.

Simple modifications or changes of the present invention can be easily carried out by those skilled in the art, and all such modifications or changes can be seen to be included in the scope of the present invention.

Claims (3)

A heating mixer for drying the hot water while stirring and transporting the water waste, a hopper for crushing the water waste into the heating mixer, a cooling lift for air cooling while transporting the dry waste discharged from the heating mixer, and the cooling lift. And a deodorizing means for taking out the discharged dry waste and returning a part of the dry waste to the hopper, and deodorizing means for supplying hot air into the heating mixer and deodorizing the hot air. Deodorization means is connected to the exhaust port of the cooling lift and the hot air inlet pipe of the heating mixer, an exhaust line connected to the exhaust port of the heating mixer to discharge hot air to the atmosphere, and a hot air from the exhaust line connected in the middle of the exhaust line. And deodorization furnace for burning and deodorizing the fuel together with fuel, and a first heat exchange connected to the exhaust line and the circulation line downstream of the deodorization furnace and heat-exchanging combustion gas in the exhaust line and air in the circulation line to supply hot air to the heating mixer. Water-containing waste drying apparatus, characterized in that consisting of. A heating mixer for drying the hot water while stirring and transporting the water waste, a hopper for crushing the water waste into the heating mixer, a cooling lift for air cooling while transporting the dry waste discharged from the heating mixer, and the cooling lift. And a deodorizing means for taking out the discharged dry waste and returning a part of the dry waste to the hopper, and deodorizing means for supplying hot air into the heating mixer and deodorizing the hot air. The heating mixer is provided with an exhaust port for exhausting hot air to the deodorizing means on the upper surface of the mixer casing on the drum, and a prevention plate installed at the exhaust port to filter the hot air and at the bottom of the filter to prevent the outflow of dry waste. Function garbage drying apparatus, characterized in that. The wastewater drying apparatus of claim 1, wherein the deodorizing means further comprises a second heat exchanger connected to an exhaust line downstream of the first heat exchanger and connected to an exhaust line from the exhaust port of the heating mixer to the deodorization passage. Device.