JP6367439B1 - Dehumidifying and drying equipment - Google Patents

Abstract

[Problem] To provide a dehumidifying dryer capable of efficiently drying a material to be dried and obtaining a dry product of stable quality even when drying at a low temperature in order to suppress deterioration of the material to be dried and generation of odor. . SOLUTION: A molding unit 21 having a shaping device 21 for shaping a material K to be dried and a cutting machine 22 for cutting the material K to be dried, and an endless net 311 are provided. An endless net conveyor 31 for receiving the material to be dried K and transferring it in the horizontal direction, a dehumidifier 32 for removing the humidity of the air, a heater 33 for raising the temperature of the air dehumidified by the dehumidifier 32 with hot water, and an endless net conveyor 311 A dehumidifying and drying apparatus comprising: a drying unit 3 having a cover lid 34 for covering. [Selection] Figure 1

Description

  The present invention relates to drying dewatered sludge obtained by dewatering activated sludge generated in a sewage treatment facility or the like.

  It is common to reuse dewatered sludge generated in sewage treatment facilities as resources. Although there are various reuse destinations, it is rare to use dehydrated sludge directly, and the amount of water is adjusted according to the intended use of the reuse destination.

  Adjustment of the amount of water is generally performed by evaporating water in the dewatered sludge (drying the dehydrated sludge). In this case, it is common practice to manipulate the temperature on the dewatered sludge side, the temperature on the gas side (mostly air), the humidity, and the atmospheric pressure so that the moisture of the dewatered sludge easily moves to the gas side.

There are direct heating drying and indirect heating drying as a drying method using a machine.
Direct heating drying is a drying method in which dehydrated sludge is transferred in direct contact with a heating medium, and examples of the heating medium include dry hot air and heated steam that are higher in temperature than dehydrated sludge.
Indirect heating drying is a drying method in which dehydrated sludge is indirectly transferred from the heating medium by contacting the heat transfer surface of the heat transfer body. The heat transfer body has high heat resistance and heat conductivity, such as a metal plate. Things can be raised. Further, steam is generally used as the heating medium.
In any drying method, in order to increase the drying efficiency, the contact with the heating medium or the heat transfer surface is increased by stirring, or the dehydrated sludge before drying is formed to increase the surface area per unit weight.

Here, when the temperature is raised to a high temperature so that the water in the dewatered sludge can be evaporated quickly, the odor component contained in the dewatered sludge moves to the gas side and a strange odor is generated, or it is absorbed by the moisture moved to the gas side. Odor is generated in the separated water.
The conventional direct heating drying technology dries sludge using hot air (over 100 ° C). Therefore, dry exhaust gas containing odor components such as hydrogen sulfide and ammonia has been deodorized by high-temperature thermal decomposition, for example, by staying at about 800 ° C. for several seconds.
However, in this method, the ratio of the amount of heat used for sludge drying (evaporated water amount x latent heat of water) out of the applied heat amount is low, and the drying energy efficiency is low. Alternatively, in addition to the latent heat of vaporization of water necessary for drying, it is necessary to provide a large amount of heat required for deodorization as sensible heat, and the drying energy efficiency is low.

  There is a technique for drying dehydrated sludge at a low temperature in order to suppress the transfer of odor components from the dehydrated sludge side to the outside. In this case, the evaporation of moisture is slowed down and the drying time is lengthened. Therefore, in order to process a large amount of dewatered sludge, it is necessary to enlarge the apparatus or to install a plurality of devices.

  As a measure for shortening the drying time of the dewatered sludge even at low temperatures, it is useful to increase the drying efficiency by increasing the surface area (specific surface area) per unit weight of the dewatered sludge. In the case of reuse, since the moisture content of the dried product is required to be within a certain range, a molding machine for uniformly molding dehydrated sludge with high viscosity is required.

  Regarding the problems associated with drying such dewatered sludge, the cooling step of cooling and dehumidifying the air used for drying to a temperature lower than 5 ° C. below the temperature of the sludge immediately after drying, and the air cooled by the cooling step at 40 ° C. Drying of the sludge is performed in such a range that the heating step of heating to dry air and the drying air and the sludge to be dried are brought into direct contact with each other so that the temperature of the sludge immediately after drying becomes 25 ° C to 60 ° C. A technique for drying sludge using a heating medium in a circulating manner by cooling and dehumidifying the air whose temperature has been decreased and increased in the drying process in the cooling process. (Patent Document 1). By drying sludge at a relatively low temperature, the generation of odorous gases is reduced.

  In addition, a dewatered sludge molding machine has been proposed that is not easily affected by the viscosity of the dewatered sludge, has no problem with sludge adhesion, and does not have the problem of foreign matter biting caused by a compression roller (Patent Document 2).

  Furthermore, a sludge drying treatment apparatus has been proposed that can ensure a large treatment capacity, can be efficiently dried at low cost, and can reduce the labor and time required for maintenance (Patent Document 3).

JP 2001-70995 A JP 2012-179591 A JP 2007-105565 A

The inventors of the present application have recognized at least the following problems when conceiving the present invention.
Since the sludge drying method according to Patent Document 1 is performed at a relatively low temperature in a range where the temperature of the sludge immediately after drying is 25 ° C. to 60 ° C., the drying time becomes long. In addition, there is a problem that measures to stabilize the drying quality by shaping and homogenizing the sludge to be dried are necessary, the equipment becomes larger, and the stabilization of the sludge molding quality is essential. .

When the dewatered sludge molding machine according to Patent Document 2 is used for low temperature drying, it is necessary to increase the number of holes in the perforated plate in order to form the dehydrated sludge into a small diameter suitable for low temperature drying, which increases the width of the perforated plate. Therefore, there was a problem that the width of the conveyor had to be increased accordingly.
Conversely, when the diameter of the hole is determined according to the conveyor, the string-like dewatered sludge has a large diameter, and in order to dry it at a low temperature, there is a problem that the drying time needs to be extended and the apparatus becomes large.
In order to prevent the width of the perforated plate from expanding, for example, when the holes of the perforated plate are arranged like watering, when arranged in two or three steps toward the transfer direction of the conveyor, In any case where the chute with the outlet narrowed is laid on the conveyor, the string-like dewatered sludge is stacked and arranged on the conveyor, resulting in uneven contact with the heating medium, In order to compensate for this, there has been a problem that measures such as increasing the circulation amount of the heating medium or extending the drying time to increase the chance of contact with dehydrated sludge are necessary. Due to this measure, there has been a problem that an increase in power occurs or an increase in the size of the apparatus is required.
Moreover, if the number of holes increases, the frequency of causing foreign matter to get tangled or clogged in the hole that pushes the dewatered sludge in a string shape increases the frequency of cleaning and increases the frequency and time of cleaning, and the amount of drying processing decreases. There was a problem.

  The sludge drying treatment apparatus and the drying treatment method according to the cited document 3 are set so that the water-containing sludge adheres to the surface of the heating drum, and the sludge having a reduced water content is scraped off from the surface of the heating drum by a scraper. Since the water-containing sludge in contact with the surface is exposed to a high temperature, there has been a problem that partial alteration of the sludge due to heat and generation of odor cannot be suppressed.

  The present invention has been made in order to solve the above-described problems. Even when drying at a low temperature in order to suppress sludge alteration and odor generation, the sludge is efficiently dried and stable quality is achieved. An object of the present invention is to provide a dehumidifying dryer capable of obtaining a dried product.

(Configuration 1)
A molding part having a shaping device for shaping the object to be dried into a cylinder and a cutting machine for separating the object to be dried shaped into the cylinder, and an endless net, and receiving the object to be dried from the molding part in the horizontal direction An endless net conveyor for transporting to the air, a dehumidifier for removing the humidity of the air, a heater for raising the temperature of the air dehumidified by the dehumidifier with hot water, and a cover for covering the endless net conveyor. Dehumidifying and drying equipment.

(Configuration 2)
The shaper includes a receiving port, a cylindrical outer cylinder having a delivery port larger in diameter than the receiving port, the inside of the outer cylinder, with the apex facing the receiving port side and the bottom surface facing the sending port side. Arranged cones, and
The cutting machine is provided with a cutting section for separating the object to be dried pushed out from the shaping device, and a guide surface for separating the object to be separated separated from the object to be dried pushed out from the shaping device. The dehumidifying and drying apparatus according to Configuration 1, comprising at least one cutting blade and a driving device that moves the cutting blade along the delivery port.

(Configuration 3)
The dehumidifying and drying apparatus according to Configuration 1 or 2, wherein the molding unit includes a spreader that sprays the molded object to be dried.

  According to the dehumidifying and drying apparatus of the present invention, even when drying at a low temperature in order to suppress deterioration and odor generation of the object to be dried, the object to be dried can be efficiently dried and a stable quality dried object can be obtained. Can do.

It is the schematic which shows the dehumidification drying apparatus of embodiment which concerns on this invention. It is the schematic which shows the molding machine in the dehumidification drying apparatus of embodiment. It is the schematic which shows the spreader in the dehumidification drying apparatus of embodiment. It is a schematic whole block diagram of the dehumidification drying apparatus of embodiment. The basic mechanism principle of drying is shown. The relationship between the moisture content and the drying speed and the three periods are shown.

  Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. In addition, the following embodiment is one form at the time of actualizing this invention, Comprising: This invention is not limited within the range.

FIG. 1 is a partial cross-sectional view showing a dehumidifying and drying apparatus 1 according to the embodiment shown in FIG.
The dehumidifying and drying apparatus 1 according to the present embodiment includes a shaping unit 2 that includes a shaper 21 that shapes an object to be dried K into a substantially cylindrical shape, and a cutting machine 22 that separates the object to be dried K that is shaped into a substantially cylindrical shape. An endless net conveyor 31 that includes a net 311 and receives the material to be dried K from the molding unit 2 and transports it in the horizontal direction, a dehumidifier 32 that removes the humidity of the air, and warms the air dehumidified by the dehumidifier 32 with hot water The drying unit 3 includes a heater 33 and an endless net conveyor 31, a dehumidifier 32, and a cover 34 that covers the heater 33.

  First, the movement of the material to be dried K will be described. According to this embodiment, the to-be-dried object K is supplied to the shaping device 21 of the shaping | molding part 2, for example with a pressure pump, and is shaped in a substantially cylindrical shape. The to-be-dried object K shaped into a substantially cylindrical shape by the shaper 21 is cut by the cutting machine 22, formed into a uniform thickness, and received on the endless net conveyor 311 a at the uppermost stage disposed on the endless net conveyor 31. It is spread on 311ac.

  The material to be dried K spread on the receiving side 311ac of the endless net 311a is transferred in the direction of the delivery side 311af of the endless net 311a, and is spread on the receiving side 311bc of the endless net 311b. The material to be dried K spread on the receiving side 311bc of the endless net 311b is transferred in the direction of the delivery side 311bf of the endless net 311b and spread on the receiving side 311cc of the endless net 311c. The to-be-dried material K laid on the receiving side 311cc of the endless net 311c is transferred in the direction of the delivery side 311cf of the endless net 311c, falls from the delivery side 311cf, and is discharged from the discharge port 346 to obtain a dry matter P.

  The endless nets 311 (each endless net 311a to c) are made of a net having a size that does not allow the molded object K to pass through. The endless nets 311a to c are horizontally arranged in a so-called belt conveyor shape by at least one pair of cylindrical rotating bodies 312. It is arranged. The at least one rotating body 312 is rotated by a driving machine (not shown), and transports the endless net 311 in one direction at a constant speed.

Next, the drying of the material to be dried K will be described.
FIG. 5 shows the basic mechanism principle of drying. There are three periods of drying: A: material preheating period, B: constant rate drying period, and C: reduced rate drying period. A: The material preheating period is a period during which the material is heated, and drying proceeds slightly. B: During the constant rate drying period, all of the amount of heat flowing into the material is spent on moisture evaporation while the material temperature remains constant. This period lasts as long as free water exists on the surface and evaporates. C: The decreasing rate drying period is a period until the water evaporation rate decreases and the water content reaches equilibrium.

  FIG. 6 shows the relationship between the moisture content and the drying speed and three periods (A: material preheating period, B: constant rate drying period, C: reduced rate drying period). It can be seen that from the material preheating period to the constant rate drying period, the drying rate is kept high, while in the reduced rate drying period, the drying rate decreases as the moisture content decreases.

  In the dehumidifying and drying apparatus 1, the material to be dried K on the endless net 311a is in contact with the air circulated by the circulators 341a and 341b (a heating medium for heating and drying the material to be dried K). The circulating air is dehumidified by the dehumidifier 32, heated by the heater 33 using hot water as a heat source, sent to the drying unit 3 by the blower 331, and a circulator 341a for circulating the air in the drying unit 3. It is circulated and stirred by b and kept uniform in the drying section 3.

  Immediately after being molded by the molding unit 2 and laid on the endless net 311a, the material to be dried K has a low product temperature and a high moisture content, and the temperature difference from the air in the drying unit 3 is large. . The object to be dried K is heated by contact with the air in the drying unit 3, but the temperature of the object to be dried K having a uniform thickness is heated uniformly, and drying does not proceed so much until it becomes constant ( Material preheating period).

  Thus, in the material preheating period, it is desirable to keep the material K to be dried on the endless net 311a until at least the surface is dried.

When the product temperature becomes constant and all the heat flowing into the object to be dried K is consumed for moisture evaporation, the drying speed, that is, the speed at which moisture is dissipated from the object to be dried K becomes the fastest. At this time, in the dehumidifying / drying apparatus 1 of the present embodiment, as will be described later, the thickness of the object to be dried K is uniformly formed by the forming unit 2, and therefore, moisture evaporation (drying) of the object to be dried K is also performed. Progress evenly and efficiently. Therefore, a good dried product P can be obtained even at low temperature drying.
The drying speed can be controlled not only by controlling the temperature and flow rate of air as a heating medium, and by controlling the heating time, but also by the laying interval of the material to be dried K. In order to increase the drying speed, the laying interval of the material to be dried K should be wider. Specific conditions are appropriately set according to the state of the material to be dried K, the conditions of the dried material P to be obtained (target moisture content), and the like. The laying interval of the material to be dried K can be controlled by the supply amount of the material to be dried K, the transfer speed of the endless net conveyor 31, and the like.

  The to-be-dried object K can be easily laid flat on the endless net by being uniformly formed by the molding unit 2, and the specific surface area of the to-be-dried object K is reduced after the constant rate drying period. There is no need to compensate by spreading, and it is efficiently dried even in a reduced-rate drying period, so there is no need to take a long drying time so that the drying quality is uniform. The object to be dried K that has been dried is discharged to the outside through the discharge port 346.

Next, the shaping | molding of the to-be-dried material K by the shaping | molding part 2 is demonstrated.
FIG. 2 is a view showing the molding unit 2 in the dehumidifying and drying apparatus 1 of the present embodiment shown in FIG.
The molding unit 2 includes a shaper 21 and a cutting machine 22.
The shaping device 21 includes a receiving port 213, a cylindrical outer body 211 having a delivery port 214 having a diameter larger than that of the receiving port 213, and an inside of the outer body 211, with a vertex on the receiving port 213 side and a bottom surface on the sending port 214 side And a conical body 212 disposed toward the head. The bottom surface of the cone body 212 is disposed so as to protrude from the same surface as the edge of the outer cylinder 211 on the delivery port 214 side or to the delivery side, and the perpendicular line from the apex to the bottom surface of the cone body 212 extends in the delivery direction of the outer cylinder 211. On the other hand, it is arranged so as to be the same as the central axis of the vertical section.
The cutting machine 22 includes a cutting unit 221 a that cuts off the object to be dried pushed out from the shaping device 21, and a guide surface 221 b that peels off the material to be dried cut off by the cutting unit 221 a from the object to be dried pushed out from the shaping device 21. The cutting blade 221, the cutting blade fixing member 224 that connects the cutting blade 221 to the rotating shaft 223 of the driving device 222, and the driving device 222 that rotates the rotating shaft 223 around the center of the delivery port 214.
In the dehumidifying and drying apparatus 1 of this embodiment, the shaft of the cone 212 is arranged coaxially with the rotation shaft 223, and the cone 212 is rotatably attached to the rotation shaft 223. Since the cone 212 is rotatable with respect to the rotation shaft 223, the cone 212 is stopped during operation, but the cone 212 is rotated (the cone 212 is fixed to the rotation shaft 223). May be attached). Further, as will be described later, a mechanism for moving the cone 212 in the direction of the rotating shaft 223 of the cutting machine 22 may be provided as a mechanism for adjusting the thickness of the material to be dried K. .

When the material to be dried K is press-fitted into the outer cylinder 211 from the receiving port 213, it is transferred in the direction from the apex of the cone 212 to the side surface and the inner wall portion of the outer cylinder toward the delivery port 214. As described above, the material to be dried K transferred in a circular shape in the cross section perpendicular to the transfer direction at the receiving port 213 becomes an annular shape in the shaper 21 by the cone 212, and gradually its width (thickness). Is narrowed. When the material to be dried K is delivered from the delivery port 214, the shape thereof becomes a substantially cylindrical shape with a uniform thickness. The cutting blade 221 is moved along the annular delivery port 214 and cut by the cutting portion 221a. In this embodiment, four cutting blades 221 are fixed to a circular cutting blade fixing member 224 at intervals of 90 degrees, and this is connected to the rotation shaft 223 of the driving device 222 to rotate, thereby cutting the cutting blade 221 to the delivery port 214. Is moving along.
In the embodiment, four cutting blades 221 are provided. However, the number of cutting blades 221 depends on the size of the outlet 214, the thickness of the material K to be dried (the gap between the outlet 214 and the cone 212), What is necessary is just to set suitably according to the state of the dry matter K, supply amount, etc. (at least 1 or more should just be provided).

  The to-be-dried object K cut | disconnected by the cutting part 221a of the cutting blade 221 is extruded along the guide surface 221b arrange | positioned so that it may not contact with the to-be-dried object K continuously extruded from the delivery port 214, and thickness It is formed into a uniform dried material K. That is, the cutting portion 221a has a blade portion having a size corresponding to the thickness of the object K to be dried (the gap between the delivery port 214 and the cone 212), and the guide surface 221b is continuously formed from the cutting portion 221a. It is formed so as to be curved (curved away from the delivery port 214), whereby the peeling of the material to be dried K is promoted, and the material to be dried K having a uniform thickness is peeled off.

  The thickness of the material to be dried K can be adjusted by moving the cone 212 on the rotating shaft 223 of the cutting machine 22. When the cone 212 is moved in the direction of the cutting machine 22, the space between the outer body 211 and the cone 212 is widened, and a substantially cylindrical object to be dried K having an increased thickness can be obtained. On the contrary, when the cone 212 is moved in the direction of the receiving port 213, the interval between the outer body 211 and the cone 212 is narrowed, and a substantially cylindrical object to be dried K having a reduced thickness can be obtained.

Next, the spreader 23 for spreading the to-be-dried object K in which the shaping | molding part 2 was shape | molded to the width direction of the endless net 311a is demonstrated.
FIG. 3 is a view showing the spreader 23 in the dehumidifying and drying apparatus 1 of the present embodiment shown in FIG.
The spreader 23 includes a supply pipe 230 that connects the molding unit 2 and the material to be dried K transfer pipe 4, a connecting rod 231 that transmits horizontal movement to the supply pipe 230, and an egg-shaped cam that transmits circular motion to one end of the connecting rod 231. 232 and an egg-shaped cam driving device 233 that rotates the egg-shaped cam 232.

  The supply pipe 230 is an L-shaped pipe. One end of the supply pipe 230 is attached to the molding unit 2, and the other end is connected to the dry matter K transfer pipe 4 via the rotary joint 234. One end of the connecting rod 231 is rotatably attached to the supply pipe 230 in such a manner that it can move in the horizontal direction, and the other end of the connecting rod 231 can be moved in the horizontal direction at the tip of an egg-shaped cam arranged to rotate in the horizontal direction. It is attached to be rotatable.

  The molding unit 2 reciprocates in the short direction of the endless net 311a by the horizontal reciprocation of the oval cam 232 transmitted from the connecting rod 231 to the supply pipe 230 in the horizontal direction. For this reason, the to-be-dried material K can be uniformly distributed on the endless net 311a, and the to-be-dried material K can be dried in a uniform state. Spreading by the spreader 23 is particularly effective when the endless net 311 is wide.

As described above, according to the dehumidifying and drying apparatus 1 of the present embodiment, the shaping device 21 that shapes the material to be dried K into a substantially cylindrical shape and the cutting machine 22 that separates the material K to be dried shaped into a substantially cylindrical shape. An endless net conveyor 31 that includes a molding unit 2 and an endless net 311 and receives the material to be dried K from the molding unit 2 and moves in the horizontal direction, a dehumidifier 32 that removes air humidity, and air that has been dehumidified by the dehumidifier 32 Provided with the heater 33 for raising the temperature with hot water, and the drying section 3 comprising the endless net conveyor 31, the dehumidifier 32 and the cover 34 covering the heater 33, the following excellent effects are provided: Can play.
By molding the article to be dried K by the molding unit 2 including the shaping device 21 and the cutting machine 22, the thickness of the molded article K to be dried becomes uniform. Moreover, it is laid without overlapping on the endless net conveyor 31. For this reason, even when drying with relatively low temperature air heated by warm water, the material to be dried K can be uniformly dried, and the dry matter P having the target moisture content is stable within the set drying time. Will be obtained.

  By transferring the material to be dried K in the horizontal direction by the endless net conveyor 31, the external force applied to the material to be dried K having a uniform thickness formed by the molding unit 2 is reduced. Crushing can be suppressed. For this reason, the small piece of the to-be-dried material K which generate | occur | produces with the crushing of the to-be-dried material K dries and becomes dust, and the efficiency fall by adhesion to the dehumidifier 32 or the heater 33 can be prevented.

  By covering the endless net conveyor 31, the dehumidifier 32, and the heater 33 with the cover 34, the material K to be dried can be dried in an environment independent from the outside. For this reason, the temperature, humidity, and air flow in the drying unit 3 can be arbitrarily controlled, and the material to be dried K can be dried within a predetermined drying time up to the target moisture content. In addition, it is possible to prevent the odor from the material to be dried K that is generated in a considerable amount from being diffused outside. In the present embodiment, the endless net conveyor 31, the dehumidifier 32, and the heater 33 are covered with the cover 34, but the present invention is not limited to this. It may be provided, etc. (As long as the drying section can be in an environment independent from the outside).

  By removing the humidity of the air in the drying unit 3 by the dehumidifier 32, the air having a low humidity can be supplied into the drying unit 3 again. For this reason, the humidity of the air in the drying part 3 falls, the water | moisture content of the to-be-dried material K becomes easy to move to the air in the drying part 3, and drying of the to-be-dried material K advances. Moreover, a part of odor in the drying part 3 comes to be removed by dehumidification. Furthermore, since the air in the drying unit 3 can be circulated and used, the amount of air drawn from the drying unit 3 can be made arbitrary for the purpose of removing odors. For this reason, the amount of air extracted can be matched with the processing capacity of the deodorizing facility.

  By raising the temperature of the air dehumidified by the dehumidifier 32 with a heater 33 using hot water as a heat source, the amount of heat necessary for drying can be supplied into the drying unit 3. For this reason, the temperature of the air in the drying part 3 is stabilized, the to-be-dried object K is heated, the water | moisture content of the to-be-dried object K becomes easy to move to the air in the drying part 3, and drying of the to-be-dried object K is carried out. Come on.

  Since warm water is used as a heat source, the temperature in the drying section 3 does not become so high that the odor component of the material to be dried K is volatilized. For this reason, the load on the deodorizing facility can be reduced and the deterioration of the equipment such as corrosion can be prevented.

  Since hot water is used as a heat source, in addition to waste heat from generators, incinerators and factories, renewable energy such as solar water heaters can be used as a heat source for producing hot water.

According to the molding unit 2 of the present embodiment, the shaper 21 includes the receiving port 213, the outer body 211 having the delivery port 214 having a diameter larger than the receiving port, and the apex of the receiving port 213 inside the outer body 211. The cone 212 is disposed with the bottom surface facing the delivery port 214 side, and the cutting machine 22 includes a cutting portion 221a for cutting the material K to be dried pushed out from the shaper 21, and the cut object One or more cutting blades 221 provided with a guide surface 221b for avoiding the dried material K from the material to be dried K extruded from the shaping device 21 and the cutting blade 221 having a cross section perpendicular to the delivery direction of the outer drum 211. By using the driving device 222 that rotates around the center, the following excellent effects can be obtained.
Since the gap between the outer cylinder 211 and the cone 212 is gradually narrowed from the receiving port 213 toward the outlet port 214, a region in which the material to be dried K stays in the outer drum 211, that is, a so-called dead region is eliminated. For this reason, obstruction | occlusion of the shaping device 21 resulting from accumulation to the to-be-dried area | region vicinity of the to-be-dried material K and the to-be-dried material K can be prevented. In a conventional molding machine (for example, a dewatered sludge former of Patent Document 2), sludge (substance to be dried) is molded by a partition plate or a hole provided in the partition plate. Although sludge clogging is likely to occur depending on the region, according to the dehumidifying and drying apparatus 1 of the present embodiment, the molded part 2 is constituted by the outer drum 211 in which the cone 212 is arranged at the center, and the partition The location that causes clogging of the plates, etc. is eliminated as much as possible, and the pressure is evenly applied when shaping the sludge (to-be-dried), so that problems such as clogging are prevented. is there.

  Since the delivery port 214 has an annular shape due to the inner wall of the outer body 211 and the bottom side of the cone 212, the material to be dried K can be extruded into a substantially cylindrical shape with a uniform thickness. By cutting this off with the cutting blade 221, the material to be dried K having a uniform thickness can be obtained easily and stably.

A molding apparatus provided with a linear slit for molding the material to be dried K to a thickness similar to the thickness of the material to be dried K when the material to be dried K is molded by the molding unit 2 by extruding the material to be dried K into a substantially cylindrical shape. Compared with the width, the width of the molding part 2 is 1/3 or less, and the limitation of the width of the endless net conveyor 31 due to the width of the molding apparatus can be reduced.
A cutting portion 221a for separating the material to be dried K pushed out from the shaping device 21 by the cutting blade 221 and a guide surface 221b for separating the material to be dried K separated from the material to be dried K pushed out from the shaping device 21 are provided. By providing, the to-be-dried material K cut | disconnected by contacting with the to-be-dried material K extruded from the shaper 21, or the to-be-dried materials K adheres and deform | transforms, or on the endless net 311a. Can be prevented from overlapping. Even on the endless net 311 after the endless net 311a, it is almost the same as the laying of the material K to be dried on the endless net 311a. Therefore, the material K having a uniform thickness is stably laid on the endless net conveyor 31. be able to.

  Since the molding unit 2 includes the spreader 23 that sprays the molded object K to be dried, even if the molding part 2 is narrower than the endless net 311a, the object K to be dried is uniformly laid on the endless net 311a. can do. For this reason, the upper surface of the wide endless net 311a can be used for drying without leaving an excess, and the amount of drying treatment can be optimized. Moreover, the to-be-dried material K on the endless net conveyor 31 comes to be exposed to the air in the drying unit 3 uniformly, and the quality of the dried material P is stabilized.

  In the present embodiment, the shaper is an example that shapes an object to be dried into a substantially cylindrical shape, but the present invention is not limited to this, and may be one that shapes an object to be dried into a cylindrical shape. That's fine. For example, the object to be dried may be shaped into an elliptical cylindrical shape or a polygonal cylindrical shape. It is only necessary to use outer cylinders and cones corresponding to the respective shapes. However, as in this embodiment, a substantially cylindrical shape is most efficient and suitable for obtaining an object to be dried having a uniform thickness.

  Since the dehumidifying and drying apparatus according to the present invention can be dried with low-temperature heat, for example, the residue generated in the food processing process is used as a heat source for drying and drying using the exhaust heat of the heat used in the product manufacturing process. It is also possible to reduce the volume.

1. . . 1. Dehumidification drying device . . Molding part 21. . . Shaper 211. . . Outer trunk 212. . . Cone (cone)
213. . . Entrance 214. . . Outlet 22. . . Cutting machine 221. . . Cutting blade 221a. . . Cutting part 221b. . . Guide surface 222. . . Drive device 23. . . 2. Spreader . . Drying section 31. . . Endless net conveyor 311. . . Endless net 32. . . Dehumidifier 33. . . Heater 34. . . Cover

Claims (3)

A shaping unit having a shaping device for shaping the object to be dried into a cylinder, and a cutting machine for separating the object to be dried shaped into the cylinder;
An endless net conveyor that includes an endless net and receives a material to be dried from the molding part and transports it in the horizontal direction;
A cover covering the endless net conveyor;
A drying unit having a dehumidifier that removes the humidity of the air in the cover and a heater that raises the temperature of the air dehumidified by the dehumidifier with hot water;
With
The shaper is
An entrance and an exit;
A cylindrical outer body,
Inside the outer body, a cone disposed with the apex facing the receiving port side and the bottom surface facing the sending port side,
With
The cutting machine is
One or more cutting blades provided with a cutting part for separating the object to be dried pushed out from the shaping device, and a guide surface for separating the object to be dried separated from the object to be dried pushed out from the shaping device When,
A driving device for moving the cutting blade along the delivery port;
A dehumidifying and drying apparatus. The delivery port, dehumidifying and drying apparatus according to claim 1, characterized in that from said inlet opening is large. The molded part is
The dehumidifying and drying apparatus according to claim 1, further comprising a spreader that sprays the molded object to be dried.

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