TWI410597B - Apparatus for drying moisture materials - Google Patents

Abstract

Provided is a hydrate drying device, comprising a drying device body and a storage part. The drying device body supplies hydrate to the internal part in a pressure reduction state, and heats the hydrate while moving the hydrate towards a certain direction. The storage part is disposed at the downstream side of the moving direction of the hydrate of the drying device body, so that the internal storage part can be communicated with the internal drying device. The storage part is provided with a open and close mechanism capable of sealingly closing and opening an outlet for discharging the hydrate.

Description

Hydrate drying device

The present invention relates to a hydrating device for drying a hydrate containing water in a reduced pressure environment, in particular, relating to continuous supply of hydrates and drying after drying. A effluent drying device that continuously discharges the material.

The present application claims priority based on Japanese Patent Application No. 2010-024701, filed on Jan.

In the past, a hydrating device has been used as a means for heating and drying a hydrate of various raw materials, wastes, and the like in a reduced pressure environment. This effluent drying apparatus decompresses the inside of the sealed apparatus to lower the boiling point, and at a low temperature, the hydrate supplied into the apparatus becomes dry. Here, one of the treatment methods of the object to be treated (that is, the hydrate) in the effluent drying apparatus is a batch processing method. This "batch processing method" means that after a predetermined amount of hydrated material is supplied into the apparatus, the hydrated substance is not taken out of the apparatus before the drying process is completed, but the hydrated substance is stirred while being It keeps it in a uniform state while drying it.

However, in this batch processing mode, in the latter half of the drying process, the capacity of the hydrate is greatly reduced due to evaporation of moisture, so that unnecessary space is generated inside the device, and heat dissipation is increased to become empty (air-fuel). status. Therefore, the batch processing method has problems of poor thermal efficiency and long drying time. In addition, depending on the batch processing method, it is necessary to design a boiler, a condenser, and a cooling unit constituting the hydrate drying device in a state in which the evaporation rate of the hydrate of the hydrate in the initial stage of the drying process is maximized. Machines, etc. Therefore, at the end of the drying process, these machines have become excessively high-spec, and because of the high-priced purchase and large-scale machines, the cost has risen and the size of the device has increased. In addition, the batch processing method is as described above, and the hydrated material must be stirred during the drying process. Therefore, at the end of the drying process, the dried matter after the moisture content is lowered will be dusted and fly in the device. When the dried material is discharged to the outside of the device, it also causes problems surrounding the contaminated device.

Conventionally, in order to solve the problem of the batch processing method, a continuous treatment method is employed as another treatment method for a hydrate (for example, please refer to JP-A-2006-153376). This continuous treatment means that the hydrated material is continuously supplied into the apparatus, and the hydrated material is conveyed in a certain direction while being heated, whereby the drying treatment is performed, and the drying after the drying treatment is performed. The way in which the object is continuously discharged outside the device. Moreover, according to this continuous treatment method, the hydrated material is continuously transported into the apparatus, so even if the capacity of the hydrated substance is reduced as it becomes dry, it is not easy to produce unnecessary meaning in the apparatus like the batch processing method. space. Therefore, the hydration drying device using the continuous treatment method does not deteriorate the thermal efficiency, and the drying treatment does not require a long time. Further, in the continuous treatment method, the rate at which moisture evaporates from the hydrate does not greatly change to the extent of the batch processing method during the drying process. Therefore, when designing various machines constituting the effluent drying apparatus, the average evaporation rate can be used as a reference, so that there is no excessively high specification of the machine like the batch processing method, resulting in problems such as an increase in cost and an increase in size of the apparatus. . Further, since the continuous treatment method does not stir the hydrate in the apparatus, there is no problem that the dry matter is dusted in the apparatus like the batch processing method.

However, the conventional effluent drying apparatus using a continuous treatment method has a problem that the hydrate cannot be dried to a very low moisture content. The conventional continuous treatment method is to continuously supply the hydrate to the device and discharge it while keeping the inside of the device in a sealed state. Therefore, in order to supply and discharge the hydrate, it is necessary to supply the supply port on the effluent drying device. Both the discharge port and the discharge port use a so-called "material seal". The so-called "material seal" is to seal the supply port and the discharge port by using the hydrate or the dry matter itself. Therefore, the hydrated material is supplied from the supply port in a state of being tightly pressed into a gas-tight state. At the discharge port, if the moisture content of the dried product is lowered too much, it will become a gas permeable state, and the dried product will not function as a "material seal". Therefore, the dried product must have a moderate moisture content. Therefore, only the hydrate can be dried until the water content is 60% by mass or more (refer to paragraph [0055) of JP-A-2006-153376).

The present invention has been developed in view of such circumstances, and an object thereof is to provide an effluent drying apparatus which continuously discharges a dry matter to a device while continuously supplying a hydrate to the device. A continuum treatment of the effluent drying unit capable of drying the hydrate to a very low moisture content.

In order to achieve the above object, the present invention employs the following means.

In other words, the effluent drying device of the present invention has a main body of the dryer, which is supplied with a hydrate in a state where the refractory is in a reduced pressure state, and is transported in a certain direction while heating the hydrate, and the hopper portion is stored. Provided on the downstream side of the hydration conveying direction of the main body of the dryer; the interior of the storage hopper portion is in communication with the inside of the dryer main body portion, and the hopper portion is configured to discharge the hydrate The discharge port and the opening and closing mechanism that can close and open the discharge port in an airtight manner.

According to this configuration, in a state where the discharge port is closed by the opening and closing mechanism provided in the storage hopper portion, the inside of the storage hopper portion can be decompressed to the same level as the inside of the dryer main body portion. Further, if the discharge port is opened by the opening and closing mechanism, the dry matter stored in the storage hopper portion can be discharged to the outside of the device.

Further, in the effluent drying device of the present invention, the opening and closing mechanism includes a lid member that is oriented to a position where the discharge port is closed and a portion to be provided along the main body of the dryer. Both ends of the downstream end opening of the hydrate transport direction are closed.

According to this configuration, when the lid member is moved to a position where the end opening of the dryer main body portion is closed, the discharge port of the storage hopper portion is opened, and the inside of the dryer main body portion is kept sealed. Therefore, when the dried product is discharged from the storage hopper portion to the outside of the apparatus, the inside of the dryer main body can be held in a sealed state in a reduced pressure state by the lid member. That is, when the lid member is moved to start the next drying process to close the discharge port of the storage hopper portion, the inside of the storage hopper portion that communicates with each other and the inside of the dryer body exhibit a certain degree. Decompressed state. In this way, it is possible to shorten the time required to depressurize the dryer main body portion and the storage hopper portion before starting the drying process, or to shorten the drying process to the next drying process. Between the time.

Further, in the effluent drying device of the present invention, the main body of the dryer has a transport mechanism having a drive shaft that is rotationally driven along a direction in which the hydrate is transported, and a drive shaft that is rotatably mounted on the drive shaft. A flap member projecting at a predetermined pitch on the outer peripheral surface.

According to this configuration, when the drive shaft rotates, the hydrated material is carried by the fin member in a certain direction inside the main body portion of the dryer. Therefore, the hydrate does not flow back in the opposite direction to the direction in which the hydrate is transported, and is mixed with the subsequent hydrate, and the hydrated material can be conveyed and dried at a more accurate and high speed.

Further, in the effluent drying apparatus of the present invention, the pitch of the fin members differs depending on the position in the direction in which the hydrate is transported.

According to this configuration, the transporting force of the hydrate by the transport mechanism is different depending on the position of the hydrate transport direction. Therefore, for example, when the hydrate reaches a predetermined moisture content and becomes highly viscous, the transporting force of the transport mechanism can be changed depending on the characteristics. In addition, the "transporting power of a hydrate" referred to in the present invention means a rotational force that rotates a drive shaft that constitutes a transport mechanism against the viscosity of a hydrate.

Moreover, in the effluent drying apparatus of the present invention, the free space between the outer casing constituting the main body portion of the dryer and the tip end of the fin member differs depending on the position in the direction in which the hydrate is transported.

According to this configuration, the transporting force of the hydrate by the transport mechanism is different depending on the position of the hydrate transport direction. Therefore, for example, when the hydrate reaches a predetermined moisture content and becomes highly viscous, the transporting force of the transport mechanism can be changed depending on the characteristics.

Further, in the effluent drying apparatus of the present invention, the dryer main body portion has a plurality of the transport mechanisms, and the fin members of the adjacent transport mechanisms are provided to mesh with each other.

According to this configuration, the hydrate of the flap member attached to one of the transport mechanisms is forcibly peeled off by the flap member of the other transport mechanism and transported in the direction in which the hydrate is transported. Therefore, even when a hydrated chemical substance or a highly viscous substance containing a high-sugar substance or the like, when the hydrated material reaches a predetermined moisture content, it becomes a characteristic having high viscosity, and when the hydrated substance contains a fibrous substance, etc. In the case of various foreign objects, the transport mechanism can be used to transport the hydrate more reliably.

Further, in the above-described transport mechanism of the hydrate-drying apparatus of the present invention, the number of revolutions of the drive shaft can be arbitrarily changed.

According to this configuration, the transport speed of the hydrated material carried out by the transport mechanism can be arbitrarily adjusted by changing the number of revolutions of the drive shaft. Therefore, the average time during which the hydrate stays inside the body portion of the dryer can be changed, and the moisture content of the dried product can be arbitrarily adjusted.

According to the effluent drying apparatus of the present invention, the inside of the storage hopper portion can be decompressed to the same level as the inside of the dryer main body, and the drying treatment can be performed. Therefore, after the moisture content of the hydrate is dried to a very low level, the dried product continuously discharged from the main body of the dryer is stored in the interior of the storage hopper. Then, after the drying process for a predetermined period of time is completed, the dry matter in the storage hopper portion can be discharged to the outside of the device as long as the discharge port is opened. According to the effluent drying apparatus of the present invention, the hydrated product can be continuously discharged while continuously discharging the hydrate, and the hydrate is dried until the water content is extremely low.

The embodiment of the present invention will be described below with reference to the drawings. First, the structure of the hydrate drying apparatus of the first embodiment will be described. Fig. 1 is a schematic view showing the configuration of the hydrate drying apparatus 1 of the first embodiment. The effluent drying apparatus 1 includes a vacuum dryer 7 in which a supply port 2 for supplying a hydrate G and a discharge port 3 for discharging a dry product K are provided for use in a ventilator 7 The plurality of vapor inlets 4 through which the vapor generated by the hydrate G is discharged to the outside, the plurality of vapor introduction ports 5 for introducing the heating vapor into the interior, and a plurality of vapor discharge ports for discharging the heating vapor to the outside 6. The hydrate drying apparatus 1 further includes a feeder 8 connected to the supply port 2, a dry material recovery unit 9 connected to the discharge port 3, and an exhaust gas pressure reducing unit 10 connected to each of the exhaust ports 4, and connected to The heater 11 of the steam introduction port 5 and the vapor condensate collector 12 connected to this heater 11 are provided. In addition, the term "hydrated material G" as used in the present invention means various raw materials and wastes containing a predetermined amount of water, and examples of wastes include sewage sludge, plant drainage sludge, and food. Waste, kitchen waste, urine sludge, livestock excrement, plant juice residue, etc.

The vacuum dryer 7 is a machine that performs drying treatment on a workpiece (that is, a hydrate G) under reduced pressure. Fig. 2 is a schematic longitudinal cross-sectional view showing the structure of the vacuum dryer 7. Moreover, in the second drawing, for convenience of explanation, the first figure is displayed in a state of being reversed left and right. The vacuum dryer 7 has a dryer main body portion 13 for drying the hydrated material G therein, and a dry product K (that is, after the drying treatment is performed to lower the moisture content of the hydrate G). Material) The storage hopper portion 14 temporarily stored.

As shown in Fig. 2, the dryer main body portion 13 houses two of the outer casings 15 having a substantially cylindrical shape, which are capable of transporting the hydrated material G in the direction in which the hydrate is conveyed in the direction indicated by the arrow in the figure. The transport mechanism 16 is constructed. Further, in the second drawing, only one transport mechanism 16 is shown, but another transport mechanism 16 is housed on the back side of the paper surface. The outer casing 15 is provided with the supply port 2 at an end portion on the upstream side (hereinafter, simply referred to as "upstream side") along the aqueous product transport direction. Three of the exhaust ports 4 are provided at predetermined intervals along the downstream side of the supply port 2 (hereinafter, simply referred to as "downstream side") of the outer casing 15 in the direction in which the aqueous material is transported. Among the three exhaust ports 4, the first exhaust port 4A located on the most upstream side in the hydrate-conveying direction and the second exhaust port 4B located at the center position are larger than the most downstream side. The diameter of the third exhaust port 4C. Further, the exhaust ports 4 (exhaust ports 4A to 4C) are connected to the pipes 17, respectively. The first pipe 17A connected to the first exhaust port 4A and the second pipe 17B connected to the second exhaust port 4B are connected to each other by the connecting pipe 18 . At the same time, the third pipe 17C connected to the third exhaust port 4C is also connected to the second pipe 17B. As a result, all of the pipes 17 extending from the three exhaust ports 4 are in communication with each other. Further, on the outer casing 15, a plurality of vapor discharge ports 6 are provided at predetermined intervals along the direction in which the hydrate is transported.

Further, each of the two transport mechanisms 16 shown in FIG. 2 has a drive shaft 20 and a hollow shaft 22. The drive shaft 20 is rotatably supported by a plurality of bearings 19 and is rotationally driven by a motor (not shown). The hollow shaft 22 is coupled to this drive shaft 20, and is provided with a projecting fin member 21 on its outer peripheral surface. Here, in the present embodiment, the flap member 21 has a spiral shape, and the pitch P thereof has a certain size along the hydrate transport direction. The pitch P means the distance between the fin members 21 in the direction in which the hydrate is transported, for example, in the case of the spiral-shaped fin member 21, when the fin members 21 are formed along the outer peripheral surface of the hollow shaft 22 The distance along the hydrate transport direction from the start point to the end point in one rotation. Further, the inside of the drive shaft 20 is hollow, and the steam introduction port 5 and the vapor discharge port 6 are provided on one end side thereof. Further, although not shown in detail in Fig. 2, the inside of the flap member 21 is also hollow and communicates with the inside of the drive shaft 20. The two transport mechanisms 16 configured in this manner are disposed inside the outer casing 15 such that the drive shafts 20 are parallel to each other and the respective fin members 21 are engaged with each other.

Further, in the present embodiment, the outer casing 15 is configured to have a substantially cylindrical shape, but the shape of the outer casing 15 is not limited thereto, as long as it has a certain length in the direction in which the hydrate is transported. The shape of the longitudinal section may also be a quadrangle or a polygon. Further, in the present embodiment, the fin member 21 has a spiral shape (spiral shape), but other shapes may be employed, such as a so-called screw type, pad type, or static mixer type. However, in the case of the spiral type of the present embodiment, the contact area of the hydrate G and the transport mechanism 16 is relatively large compared with other shapes, so that it can be efficiently executed by the transport mechanism 16 as described later. The advantage of hydrated G heating. Further, in the present embodiment, the two transport mechanisms 16 are provided. However, the number of the transport mechanisms 16 may be one, or three or more. However, if the two transport mechanisms 16 are provided as in the present embodiment, the hydrate G attached to the flap member 21 of the transport mechanism 16 of one of the transport mechanisms 16 can be used by the flap member 21 of the other transport mechanism 16. Forced to peel off. Therefore, compared with the case where only a single transport mechanism 16 is provided, even if the hydrate G is a highly viscous substance such as a chemical substance or a high-sugar substance, the hydrated substance G reaches a predetermined moisture content. When the viscous material G contains various foreign materials such as cellulose in the case of having a highly viscous property, the transport mechanism can be used to more reliably transport the hydrated material G. Further, as in the case where three or more transport mechanisms 16 are provided, the cost is increased and the size of the apparatus is increased.

Fig. 3 is a partially enlarged view showing the vicinity of the storage hopper portion 14 in Fig. 2 . The storage hopper portion 14 has a hopper body 23 having a substantially circular outer shape and a hollow shape, and a lid member 24 (that is, an opening and closing mechanism) that is provided to be slidable along the outer circumferential surface of the hopper body 23. The hopper body 23 has a function as a container, and the inside thereof is for storing the dry matter K. The hopper body 23 has a fourth exhaust port 4D for discharging steam to the outside, and a discharge port 3 for discharging the dry matter K to the outside at the bottom thereof. Further, the fourth exhaust port 4D is connected to the fourth pipe 17D, and the fourth pipe 17D is connected to the third pipe 17C. In this manner, the fourth pipe 17D is also in communication with the first to third pipes 17A, 17B, and 17C. The storage hopper portion 14 having such a configuration is provided at the downstream end portion of the dryer main body portion 13, and is provided such that the inside thereof communicates with the inside of the dryer main body portion 13.

Further, the lid member 24 has a function of closing or opening the discharge port 3 of the hopper body 23. The lid member 24 is slidable from a closed position P1 (shown in Fig. 2) that closes the discharge port 3 in an airtight manner toward an open position P2 (shown in Fig. 3) that opens the discharge port 3 to the outside. Further, when the lid member 24 is in the state of the open position P2, the discharge port 3 is opened as described above, and the end opening 25 constituting the downstream side of the casing 15 outside the dryer main body portion 13 is also given. Close it up.

Further, the shape of the hopper body 23 is not limited to a shape in which the longitudinal section is slightly circular, and the shape can be changed to a desired shape. Further, when the lid member 24 is in the open position, the discharge port 3 can be opened at least, and the end opening 25 of the outer casing 15 is not necessarily closed.

The feeder 8 shown in Fig. 1 is for supplying the hydrate G to the inside of the vacuum dryer 7. The feeder 8 is a "uniaxial eccentric screw pump" that can feed the hydrated material G in a compacted state, and is connected to the supply port 2 of the vacuum dryer 7 via the supply pipe 26. In this way, when the hydrated material G is supplied, the sealed hydrated material G can be used to seal the supply port 2, whereby the above-mentioned "material sealing" can be achieved. In addition, as long as the inside of the vacuum dryer 7 can be kept in a sealed state and the hydrated material G is supplied, the "material sealing" is not necessarily required, and the hydrating material G can be supplied to the decompressed by other means. Dryer 7. Specifically, the feeder 8 may have the same configuration as the storage hopper portion 14 on the discharge side, for example. Further, other types of pumps capable of delivering the hydrate G, for example, a volume pump such as a piston pump, may be used as the feeder 8.

The dry material recovery device 9 shown in Fig. 1 has a function as a container that receives the dried material K that has been discharged from the vacuum dryer 7 and is dropped from below. The dry material recovery device 9 is disposed directly below the storage hopper portion 14 constituting the vacuum dryer 7, and is disposed such that its container opening faces the discharge port 3 of the storage hopper portion 14. Further, although not shown in detail in the drawings, the discharge port 3 of the storage hopper portion 14 may be connected to the dry material recovery device 9 by a pipe, and the dry matter K may be discharged from the discharge port 3 by using a pump or the like. It is sent toward the dry material recovery unit 9.

The exhaust gas pressure reducing unit 10 shown in Fig. 1 has a function of discharging steam from the inside of the vacuum dryer 7, and decompressing the inside. The exhaust gas pressure reducing unit 10 includes a dust collector 28, a condenser 29, and an exhauster 30, and the dust collector 28 is connected to one end of the first exhaust pipe 27A, and the first exhaust pipe 27A is The other end is connected to the connecting pipe 18; the condenser 29 is connected to one end of the second exhaust pipe 27B, and the other end of the second exhaust pipe 27B is connected to the dust collector 28; The machine 30 is connected to one end of the third exhaust pipe 27C, and the other end of the third exhaust pipe 27C is connected to the condenser 29. Here, the dust collector 28 is used to remove scattered matter such as dust from the vapor recovered by the vacuum dryer 7. The dust collector 28 is connected to the dust collector circulation pump 31, and the dust collector circulation pump 31 is used to circulate the water used to trap the scattered matter. Further, the condenser 29 is for cooling the collected vapor to collect moisture. The condenser 29 is connected to a cooling tower 32 for cooling the refrigerant for circulating the refrigerant for cooling steam, a refrigerant storage tank 33 for storing the cooled refrigerant, and the stored refrigerant to be sent to the condenser 29. The condenser circulates pump 34. Further, the ventilator 30 decompresses the inside of the vacuum dryer 7 by sucking out the vapor from the vacuum dryer 7. The ventilator 30 is connected to an exhaust circulator pump 35 for discharging high-pressure water in the interior of the ventilator 30, and a water storage tank 36 for storing water recovered from the ventilator 30.

The heater 11 shown in Fig. 1 is for heating the transport mechanism 16 and the outer casing 15 shown in Fig. 2 . In the present embodiment, this heater 11 uses a boiler. As shown in FIGS. 1 and 2, the other end of the steam introduction pipe 37, which has one end connected to the heater 11, is connected to a vapor introduction port 5 provided at one end side of the drive shaft 20 constituting the conveyance mechanism 16, and A plurality of vapor introduction ports 5 are provided on the heating jacket 15A on the outer side of the outer casing 15. As a result, the steam generated by the heater 11 is supplied through the vapor introduction pipe 37, whereby the conveying mechanism 16 and the outer casing 15 are respectively heated.

The vapor condensate recovery unit 12 shown in Fig. 1 is for recycling steam condensed water (i.e., vapor condensed water after liquefaction of heating steam). In the present embodiment, as shown in Figs. 1 and 2, the other end of the vapor recovery pipe 38 connected to the vapor condensate recovery unit 12 is connected to a vapor provided at one end of the drive shaft 20, respectively. The discharge port 6; and a plurality of vapor discharge ports 6 provided on the heating jacket 15A outside the outer casing 15. As a result, the vapor condensed water which is heated by the transport mechanism 16 and the outer casing 15 and liquefied is recovered by the vapor condensate collector 12 via the vapor recovery pipe 38. Then, the vapor condensate recovery unit 12 sends the recovered vapor condensed water to the heater 11, which in turn generates vapor from the vapor condensed water. In this way, the steam for heating is reused.

Next, an operation when the hydrating material G is subjected to the drying treatment using the hydrate drying apparatus 1 of the first embodiment and an effect thereof will be described. At the start of the drying process, the inside of the vacuum dryer 7 is first subjected to a reduced pressure. Specifically, in a state in which the lid member 24 constituting the storage hopper portion 14 is at the closed position P1 at which the discharge port 3 is closed, the ventilator 30 shown in Fig. 1 is actuated. As a result, the ventilator 30 extracts air from the dryer main body portion 13 via the first to third exhaust pipes 27A, 27B, and 27C, thereby decompressing the inside thereof. At this time, the inside of the dryer main body portion 13 communicates with the inside of the storage hopper portion 14, and the discharge port 3 of the storage hopper portion 14 is closed by the lid member 24, so that the storage hopper portion 14 is also decompressed. It is equivalent to the main body portion 13 of the dryer.

On the other hand, heating of the transport mechanism 16 and the outer casing 15 is also performed in accordance with the pressure reduction of the vacuum dryer 7. Specifically, the steam generated from the heater 11 shown in FIG. 1 is sent to the inside of the transport mechanism 16 from the steam introduction port 5 via the steam introduction pipe 37. Specifically, the steam passes through the inside (hollow portion) of the drive shaft 20, circulates inside the hollow shaft 22 and the inside of the fin member 21, and then is exhausted from the steam discharge port 6. The entirety of the transport mechanism 16 is heated by the circulation of this vapor. Further, the steam generated from the heater 11 is supplied from a plurality of steam introduction ports 5 to the internal cavity of the heating jacket 15A provided outside the outer casing 15 via the steam introduction pipe 37, and is circulated in the heating jacket 15A. After the outer casing 15 is heated, it is exhausted from the vapor discharge port 6. Then, after the transport mechanism 16 and the outer casing 15 are sufficiently heated, the hydrate G is next supplied to the inside of the vacuum dryer 7. Specifically, the feeder 8 shown in Fig. 1 is operated, and the hydrate G sent from the feeder 8 having a water content of 60 to 100% by mass is sent from the supply port 2 via the supply pipe 26. The inside of the main body portion 13 of the dryer is inserted.

Further, as the hydration G starts to be supplied, the transport mechanism 16 also starts the transport of the hydrate G. Specifically, the drive shaft 20 is rotationally driven by a motor (not shown), and the flap member 21 transports the hydrate G from the upstream side to the downstream side in the hydrate transport direction. Further, when the transport mechanism 16 starts the transport of the hydrate G, the hydrate G will come into contact with the transport mechanism 16 and the outer casing 15 which have been heated in the above-described manner, whereby the hydrate G is also heated. As a result, the water contained in the hydrate G will evaporate, and as the hydrate G is transported downstream along the hydrate transport direction, the water content will gradually decrease. And when the hydrate G reaches the most downstream end of the main body portion 13 of the dryer, it can be carried out in accordance with the heat per unit time which is applied by the heater 11, or in accordance with the transport carried out by the transport mechanism 16 in the main body portion 13 of the dryer. Factors such as time cause the hydrate G to change to a dry matter K having a water content of 0 to 60% by mass. The transport time of the hydrate G can be adjusted, for example, by arbitrarily changing the number of revolutions of the drive shaft.

Then, this dry matter K is sequentially discharged from the end opening 25 on the downstream side of the dryer main body portion 13, and is stored in the inside of the hopper body 23 of the storage hopper portion 14. Here, as described above, the storage hopper portion 14 is also decompressed by the ventilator 30 to the same extent as the dryer main body portion 13, so that the dry matter K stored in the storage hopper portion 14 is kept in a dry state. When K reaches the most downstream end of the main body portion 13 of the dryer, the water content is the same. According to the effluent drying apparatus 1 of the present invention, the hydrated material G can be continuously supplied to the dryer main body portion 13, and the hydrated material G can be continuously discharged from the dryer main body portion 13 while continuously discharging the hydrated material G. Dry until the moisture content becomes very low.

Then, after a predetermined time elapses, the storage hopper portion 14 is emptied. In other words, when it is detected by the sensor or the like that the dry matter K in the storage hopper portion 14 has reached a certain level and is about to expire, the supply of the hydrate G to the vacuum dryer 7 is maintained, but the storage is first performed. The dry matter K in the storage hopper portion 14 is discharged to the outside of the apparatus. Specifically, the lid member 24 constituting the storage hopper portion 14 is slid from the closed position P1 shown in FIG. 2 to the open position P2 shown in FIG. 3, whereby the discharge port 3 of the hopper body 23 is given. open. As a result, the dry matter K originally stored inside the hopper body 23 will fall from the discharge port 3 and be recovered to the inside of the dry matter collector 9 disposed directly below. Further, when the lid member 24 is in the open position P2, the end opening 25 of the storage hopper portion 14 is held in a state in which the lid member 24 is closed. Therefore, while the dry matter K is discharged from the storage hopper portion 14, the dry matter K that has been transported to the downstream end of the storage hopper portion 14 is in a state of being retained in the vicinity of the end opening 25. Then, when the sensor detects that the storage hopper portion 14 has been emptied, the cover member 24 is again slid to return from the open position P2 to the closed position P1. As a result, the dry matter K discharged from the main body portion 13 of the dryer is sequentially stored in the storage hopper portion 14.

However, in the present embodiment, as described above, the end opening 25 of the dryer main body portion 13 is closed with the lid member 24 positioned at the open position P2. Therefore, the inside of the storage hopper portion 14 is brought to be equal to the atmospheric pressure due to the opening of the discharge port 3, and at this time, the inside of the dryer main body portion 13 which is held by the cover member 24 is still kept at the same time. The state of pressure. In this manner, in order to start the next drying process and return the lid member 24 to the closed position P1 to close the discharge port 3, the inside of the storage hopper portion 14 and the inside of the dryer body portion 13 which will communicate with each other will It will become a state of decompression to some extent. In this way, it is possible to shorten the time required to depressurize the dryer main body portion 13 and the storage hopper portion 14 by the ventilator 30 before starting the drying process, or to shorten the drying process to the end. The time between the start of the next drying process.

Next, the structure of the hydrate drying apparatus 1 of the second embodiment will be described. The effluent drying device 1 of the present embodiment is also a structure of the vacuum dryer 40 shown in Fig. 1 in comparison with the hydrate drying device 1 of the first embodiment, and more specifically, the main body of the dryer is configured. The structure of the two transport mechanisms 42 of 41 is different. The other structures and their functions and effects are the same as those of the first embodiment. Therefore, the same reference numerals are used for the first embodiment, and the description thereof will be omitted. Fig. 4 is a partially enlarged view showing a part of the main body portion 41 of the dryer in the present embodiment. The two transport mechanisms 42 have the drive shaft 43 and the hollow shaft 44 and the fin member 45, respectively, as in the first embodiment. However, the configuration of the fin member 45 is different from that of the first embodiment. In other words, the fin member 45 of the present embodiment has a spiral shape as in the first embodiment, but the pitch P is gradually narrowed from the upstream side to the downstream side. That is, the pitch P1 on the upstream side is larger than the pitch P2 on the downstream side (that is, P1>P2).

According to this configuration, there is an advantage that even if the capacity of the hydrate G is reduced with drying, the thermal efficiency does not deteriorate. More specifically, as shown in FIG. 2, if the pitch P in the water-containing material transport direction is kept constant as in the fin member 21 of the first embodiment, the drying process is performed. On the downstream side where the capacity of the hydrate G is decremented, a region which does not come into contact with the hydrate G will be generated in the gap of the fin member 45. If such an area is produced, the volumetric efficiency will become low, and as a result, the thermal efficiency will be deteriorated and the drying process will take a long time. In this regard, if the pitch P is gradually narrowed from the upstream side to the downstream side as in the flap member 45 of the present embodiment, the gap of the flap member 45 is hydrated even on the downstream side. It fills up without creating unnecessary areas, so the volumetric efficiency can be maintained at a high level, and the thermal efficiency is good, so the drying process takes only a short time.

Next, the structure of the hydrate drying apparatus 1 of the third embodiment will be described. The effluent drying apparatus 1 of the present embodiment is also a structure of the vacuum drying apparatus 50 shown in Fig. 1 in comparison with the hydrated material drying apparatus 1 of the first embodiment, and more specifically, constitutes a main body of the dryer. The structure of the two transport mechanisms 52 of 51 is different. The other structures and their functions and effects are the same as those of the first embodiment. Therefore, the same reference numerals are used for the first embodiment, and the description thereof will be omitted. Fig. 5 is a partially enlarged view showing a part of the main body portion 51 of the dryer in the present embodiment. The two transport mechanisms 52 have the drive shaft 53 and the hollow shaft 54 and the fin member 55, respectively, as in the first embodiment. However, the configuration of the fin member 55 is different from that of the first embodiment. In other words, the fin member 55 of the present embodiment has a spiral shape as in the first embodiment. However, contrary to the second embodiment, the pitch P is from the downstream side to the upstream side. Gradually narrowed. That is, the pitch P3 on the upstream side is smaller than the pitch P4 on the downstream side (that is, P3 < P4). According to this configuration, in the upstream portion of the transport mechanism 52, the fin members 55 are denser at a narrow pitch P3, and the area in contact with the hydrate G is large, so the water evaporation rate from the hydrate G is higher. fast. In this way, as the drying progresses, even if the water content has been lowered, the hydrate G which does not change much in the capacity, for example, in the case of drying the coffee grounds and the tea leaves, is being dried. At the beginning of the dry period, the water content of the hydrate G is still maintained in a high area (that is, in the upstream portion), and a relatively high-speed drying treatment can be performed.

Next, the structure of the hydrate drying apparatus 1 of the fourth embodiment will be described. The effluent drying device 1 of the present embodiment is also a structure of the vacuum dryer 60 shown in Fig. 1 in comparison with the hydrate drying device 1 of the first embodiment, and more specifically, the main body of the dryer is configured. The structure of the two transport mechanisms 62 of 61 is different. The other structures and their functions and effects are the same as those of the first embodiment. Therefore, the same reference numerals are used for the first embodiment, and the description thereof will be omitted. Fig. 6 is a partially enlarged view showing a part of the main body portion 61 of the dryer in the present embodiment. The two transport mechanisms 62 have the drive shaft 63, the hollow shaft 64, and the flap member 65, respectively, as in the first embodiment. However, the configuration of the fin member 65 is different from that of the first embodiment. In other words, the fin member 65 of the present embodiment has a spiral shape similarly to the first embodiment, but the pitch P at the center portion along the aqueous material transport direction is higher than the upstream portion and the downstream portion. The pitch P is narrower. That is, the pitch P6 of the fin member 65 at the center portion of the hollow shaft 64 is smaller than the pitch P5 on the upstream side and the pitch P7 on the downstream side in the hydrate-conveying direction of the hollow shaft 64 (also That is, P6 < P5, P6 < P7). According to this configuration, the conveying force of the conveying mechanism 62 tends to be the largest at the center portion where the pitch P is the narrowest. In this case, in the case of a hydrated substance G having a characteristic of high viscosity in a plastic boundary water region having a water content of 50 to 60%, for example, when a hydrated material such as sludge is subjected to a drying treatment, When the hydrate G has a high viscosity in the central portion of the transport mechanism 62, a reliable and higher speed transport can be performed.

Next, the configuration of the hydrated material drying apparatus 1 of the fifth embodiment will be described. The effluent drying device 1 of the present embodiment is also a structure of the vacuum dryer 70 shown in Fig. 1 in comparison with the hydrate drying device 1 of the first embodiment, and more specifically, the dryer main body portion is configured. The outer casing 72 of 71 has a different shape. The other structures and their functions and effects are the same as those of the first embodiment. Therefore, the same reference numerals are used for the first embodiment, and the description thereof will be omitted. Fig. 7 is a partially enlarged view showing a part of the main body portion 71 of the dryer in the present embodiment. The outer casing 72 constituting the dryer main body portion 71 has an inner diameter D which gradually decreases from the upstream side to the downstream side in the aqueous material transport direction.

According to this configuration, as in the second embodiment, even if the capacity of the hydrate G is reduced by the drying process, the thermal efficiency does not deteriorate. In other words, when the outer casing D is gradually reduced from the upstream side to the downstream side as in the present embodiment, the free space C between the front end of the flap member 74 of the transport mechanism 73 and the outer casing 72 is formed. It will gradually narrow from the upstream side to the downstream side. Therefore, even if the capacity of the hydrate G is degraded on the downstream side due to the progress of the drying process, the fin member 74 and the outer casing 72 are filled with the hydrate G and no unnecessary region is generated. In this way, high volumetric efficiency can be maintained, and the thermal efficiency is good, so the drying process can be completed in a short time.

Next, the configuration of the hydrated material drying apparatus 1 of the sixth embodiment will be described. The effluent drying apparatus 1 of the present embodiment is also a structure of the vacuum drying apparatus 80 shown in Fig. 1 in comparison with the hydrated material drying apparatus 1 of the first embodiment, and more specifically, the main body of the dryer is configured. The structure of the two transport mechanisms 82 of 81 is different. The other structures and their functions and effects are the same as those of the first embodiment. Therefore, the same reference numerals are used for the first embodiment, and the description thereof will be omitted. Fig. 8 is a partially enlarged view showing a part of the main body portion 81 of the dryer in the present embodiment. The two transport mechanisms 82 have the drive shaft 83, the hollow shaft 84, and the fin member 85, respectively, as in the first embodiment. However, the configuration of the hollow shaft 84 is different from that of the first embodiment. In other words, each of the hollow shafts 84 of the present embodiment has an outer diameter that gradually increases from the upstream side to the downstream side.

According to this configuration, similarly to the second embodiment, even if the capacity of the hydrate G is reduced by the drying process, the thermal efficiency does not deteriorate. In the same manner as in the fifth embodiment, the hollow shaft 84 gradually increases the inner diameter D from the upstream side to the downstream side, and the flap member 85 of the transport mechanism 82 is configured as in the fifth embodiment. The free space C between the front end and the outer casing 85 will gradually narrow from the upstream side to the downstream side. Therefore, even if the capacity of the hydrate G is degraded on the downstream side as the drying process proceeds, the fin member 85 and the outer casing 86 are filled with the hydrate G without causing unnecessary regions. In this way, high volumetric efficiency can be maintained, and the thermal efficiency is good, so the drying process can be completed in a short time.

Next, the structure of the hydrate drying apparatus 1 of the seventh embodiment will be described. The effluent drying device 1 of the present embodiment is also a structure of the vacuum drying device 90 shown in Fig. 1 in comparison with the hydrated product drying device 1 of the first embodiment, and more specifically, the main body of the dryer is configured. The outer casing 92 has a different shape. The other structures and their functions and effects are the same as those of the first embodiment. Therefore, the same reference numerals are used for the first embodiment, and the description thereof will be omitted. Fig. 9 is a partially enlarged view showing a part of the main body portion 91 of the dryer in the present embodiment. In contrast to the fifth embodiment, the inner casing 92 of the main body portion 91 of the dryer is gradually increased in diameter from the upstream side to the downstream side in the aqueous product transport direction. According to this configuration, in the upstream portion of the transport mechanism 93, the free space C between the tip end of the fin member 94 and the outer casing 92 is narrow, and the thermal conductivity is increased, so that the evaporation rate of moisture from the hydrate G is increased. In this way, as the drying progresses, even if the water content has been lowered, the hydrate G which does not change much in the capacity, for example, in the case of drying the coffee grounds and the tea leaves, is being dried. At the beginning of the dry period, the water content of the hydrate G is still maintained in a high area (that is, in the upstream portion), and a relatively high-speed drying treatment can be performed.

Next, the configuration of the hydrated material drying apparatus 1 of the eighth embodiment will be described. The effluent drying apparatus 1 of the present embodiment is also a structure of the vacuum dryer 100 shown in Fig. 1 in comparison with the hydrate drying apparatus 1 of the first embodiment, and more specifically, the main body of the dryer is configured. The structure of the two transport mechanisms 102 of 101 is different. The other structures and their functions and effects are the same as those of the first embodiment. Therefore, the same reference numerals are used for the first embodiment, and the description thereof will be omitted. Fig. 10 is a partially enlarged view showing a part of the main body portion 101 of the dryer in the present embodiment. The two transport mechanisms 102 have the drive shaft 103, the hollow shaft 104, and the fin member 105, respectively, similarly to the first embodiment. However, the configuration of the hollow shaft 104 is different from that of the first embodiment. In other words, in the hollow shaft 104 of the present embodiment, contrary to the sixth embodiment, the outer diameter D gradually decreases from the upstream side to the downstream side. According to the configuration of the seventh embodiment, in the upstream portion of the transport mechanism 102, the free space C between the distal end of the airfoil member 105 and the outer casing 106 is narrow, and the thermal conductivity is high, so that the hydrate is derived from the hydrate. The evaporation rate of the moisture of G becomes faster. Thereby, the same operational effects as those of the seventh embodiment can be obtained.

Next, the structure of the hydrate drying apparatus 1 of the ninth embodiment will be described. The effluent drying apparatus 1 of the present embodiment is also a structure of the vacuum dryer 110 shown in Fig. 1 in comparison with the hydrate drying apparatus 1 of the first embodiment, and more specifically, the main body of the dryer is configured. The shape of the outer casing 112 is different from 111. The other structures and their functions and effects are the same as those of the first embodiment. Therefore, the same reference numerals are used for the first embodiment, and the description thereof will be omitted. Fig. 11 is a partially enlarged view showing a part of the main body portion 111 of the dryer in the present embodiment. The outer casing 112 constituting the outer casing portion 111 of the dryer main body 112 has an inner diameter D smaller than the inner diameter D of the upstream portion and the downstream portion in the central portion along the aqueous product conveying direction. According to this configuration, the conveying force of the conveying mechanism 113 becomes maximum at the central portion where the inner diameter D of the outer casing 112 is the smallest. Thereby, the same operational effects as those of the fourth embodiment can be obtained.

Next, the configuration of the hydrated material drying apparatus 1 of the tenth embodiment will be described. The effluent drying device 1 of the present embodiment is also a structure of the vacuum dryer 120 shown in Fig. 1 in comparison with the hydrate drying device 1 of the first embodiment, and more specifically, the main body of the dryer is configured. The structure of the two transport mechanisms 122 of 121 is different. The other structures and their functions and effects are the same as those of the first embodiment. Therefore, the same reference numerals are used for the first embodiment, and the description thereof will be omitted. Fig. 12 is a partially enlarged view showing a part of the main body portion 121 of the dryer in the present embodiment. The two transport mechanisms 122 have the drive shaft 123, the hollow shaft 124, and the fin member 125, respectively, as in the first embodiment. However, the configuration of the hollow shaft 124 is different from that of the first embodiment. That is, each of the hollow shafts 124 of the present embodiment has an outer diameter D that is larger than the outer diameter D of the upstream portion and the downstream portion along the central portion of the aqueous material conveying direction. According to this configuration, the conveying force of the conveying mechanism 122 tends to be the largest at the center portion where the outer diameter D of the drive shaft 123 is the largest. Thereby, the same operational effects as those of the fourth embodiment can be obtained.

Further, it is also possible to change the pitch of the fin members constituting the transport mechanism depending on the direction in which the hydrate is transported; and to appropriately change the inner diameter of the outer casing constituting the main body portion of the dryer depending on the direction in which the hydrate is transported. The ground is combined. Moreover, the operation steps shown in the above-described embodiments, or the various shapes, combinations, and the like of the respective members are merely examples, and may be based on design requirements without departing from the gist of the present invention. And other factors, make various changes.

The above is described in terms of preferred embodiments of the present invention, but the present invention is not limited to these embodiments. Additions, omissions, substitutions, and other modifications of the embodiments are possible without departing from the scope of the invention. The present invention is not limited by the foregoing description, but is limited only by the scope of the patent application of the present application.

1. . . Hydrate drying device

2. . . Supply port

3. . . Discharge

4. . . exhaust vent

4A~4D. . . 1st exhaust port ~ 4th exhaust port

5. . . Vapor introduction port

6. . . Vapor discharge

7, 40, 50, 60, 70, 80, 90, 100, 110, 120. . . Vacuum dryer

8. . . Feeder

9. . . Dry matter collector

10. . . Exhaust pressure reduction unit

11. . . Dryer body

12. . . Vapor condensate recovery unit

13. . . Dryer body

14. . . Storage hopper

15. . . Outer casing

15A. . . Heating jacket

16. . . Shipping agency

17. . . Piping

17A~17D. . . 1st pipe to 4th pipe

18. . . Connecting piping

19. . . Bearing

20. . . Drive shaft

21‧‧‧Flap members

22‧‧‧ hollow shaft

23‧‧‧ hopper body

24‧‧‧ cover member (opening and closing mechanism)

25‧‧‧End opening

26‧‧‧Supply tube

27‧‧‧Exhaust pipe

27A~27C‧‧‧1st exhaust pipe~3rd exhaust pipe

28‧‧‧dust collector

29‧‧‧Condenser

30‧‧‧Exhaust machine

31‧‧‧Dust collector circulating pump

32‧‧‧Cooling tower

33‧‧‧Refrigerant storage tank

34‧‧‧Condenser Circulating Pump

35‧‧‧Exhaust circulator pump

36‧‧‧Water storage tank

37‧‧‧Vapor introduction tube

38‧‧‧Vapor recovery tube

P‧‧‧pitch of fin members

P1‧‧‧Closed position

P2‧‧‧Open location

G‧‧‧ hydrates

K‧‧‧Dry

Fig. 1 is a schematic view showing the configuration of a hydrate-drying apparatus 1 according to a first embodiment of the present invention.

Fig. 2 is a schematic longitudinal cross-sectional view showing the configuration of the vacuum dryer 6 of the first embodiment.

Fig. 3 is a partially enlarged longitudinal sectional view showing the vicinity of the storage hopper portion 12 of Fig. 2 .

Fig. 4 is a partially enlarged view showing a part of the main body portion 40 of the dryer according to the second embodiment.

Fig. 5 is a partially enlarged view showing a part of the dryer main body portion 50 of the third embodiment.

Fig. 6 is a partially enlarged view showing a part of the main body portion 60 of the dryer according to the fourth embodiment.

Fig. 7 is a partially enlarged view showing a part of the main body portion 70 of the dryer according to the fifth embodiment.

Fig. 8 is a partially enlarged view showing a part of the dryer main body portion 80 of the sixth embodiment.

Fig. 9 is a partially enlarged view showing a part of the main body portion 90 of the dryer according to the seventh embodiment.

Fig. 10 is a partially enlarged view showing a part of the dryer main body portion 100 of the eighth embodiment.

Fig. 11 is a partially enlarged view showing a part of the dryer main body portion 110 of the ninth embodiment.

Fig. 12 is a partially enlarged view showing a part of the dryer main body portion 120 of the tenth embodiment.

2. . . Supply port

3. . . Discharge

4. . . exhaust vent

4A~4D. . . 1st exhaust port ~ 4th exhaust port

5. . . Vapor introduction port

6. . . Vapor discharge

7. . . Vacuum dryer

13. . . Dryer body

14. . . Storage hopper

15. . . Outer casing

15A. . . Heating jacket

16. . . Shipping agency

17. . . Piping

17A~17D. . . 1st pipe to 4th pipe

18. . . Connecting piping

19. . . Bearing

20. . . Drive shaft

twenty one. . . Flap member

twenty two. . . Hollow shaft

twenty four. . . Cover member

P. . . Pitch component

P1. . . Close position

Claims (6)

A effluent drying device comprising: a main body of a dryer, which is supplied with a hydrate in a reduced pressure state, and is transported in a certain direction while heating the hydrate, and a hopper portion is provided along the hopper a downstream side of the immersion direction of the main body of the dryer; the inside of the storage hopper portion communicates with the inside of the main body of the dryer by an end opening on the downstream side of the main body of the dryer, the storage hopper The department has a discharge port for discharging the hydrated material, and an opening and closing mechanism that can close and open the discharge port in an airtight manner, and the storage hopper portion is formed in a cylindrical shape and on the outer circumferential surface of the cylinder The upper end is in communication with the end opening, and has a hopper body having the discharge port formed at another position on the outer circumferential surface of the cylinder, and the opening and closing mechanism is used to close the discharge port in an airtight manner. a position for opening the end opening, and a position for closing the end opening, that is, for opening the discharge opening Between the opposed, with a sliding cover member along the outer circumferential surface of the main body of the hopper, the hopper body is connected to the vapor discharge helpful and the pressure inside the pipe. The effluent drying device according to claim 1, wherein the dryer body portion has a transport mechanism. The transport mechanism includes a drive shaft that is rotatably driven along a hydrate transport direction, and a fin member that protrudes at a predetermined pitch on an outer peripheral surface of the drive shaft. The effluent drying apparatus according to claim 2, wherein the pitch of the fin members differs depending on the position of the hydrate transport direction. The hydrate-drying apparatus according to the second aspect of the invention, wherein the free space between the outer casing constituting the main body portion of the dryer and the front end of the fin member differs depending on the position in the direction in which the hydrate is transported. The hydrate-drying apparatus according to claim 2, wherein the dryer main body portion has a plurality of the transport mechanisms, and the fin members of the adjacent transport mechanisms are provided to mesh with each other. The effluent drying apparatus according to claim 2, wherein the transport mechanism is capable of arbitrarily changing the number of revolutions of the drive shaft.