Distributed feeding device and method for conductive heat transfer dryer

Abstract

To develop a novel distribution feeding method that allows an operator to relatively freely choose a feed port (a material feed port) in a conductive heat transfer dryer, and allows an operator to change the position of the feed port with a relatively high degree of freedom, even after the feed port is determined in design.SOLUTION: A distribution feeding device 1 that comprises a hollow body shell 21 disposed in a fixed state and a rotary heat transfer unit 22 rotatably supported therein, and is disposed on the upper part of a conductive heat transfer dryer 2 structured to bring a treated object W into contact with the heat transfer surface of the rotary heat transfer unit 22 to vaporize moisture, is characterized in that a distribution conveyer 11 capable of charging the treated object W into the body shell 21 is disposed on the upper part of the body shell 21, and a plurality of controlling bodies 13 controlling the dropping / charging of a treated object into the dryer is disposed below a discharge port 14 of the distribution conveyer 11 on a plurality of positions in the longitudinal direction of the conductive heat transfer dryer 2.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a conduction heat transfer dryer, which is a type of equipment for drying materials that are in a muddy, cake-like, powdery, granular or other state, and particularly to a new dispersive feeding device and method that increases the freedom of feeding port selection when it is desired to change the feeding port through which the materials are fed into the dryer, and enables the materials to be fed in a dispersed manner from almost any desired position. [Background technology]

[0002] For example, a conductive heat transfer dryer, also known as an ITR (Inner Tube Rotary), exists as a dryer for treating materials with high moisture content and viscosity, such as sewage sludge. The present applicant has also filed various patent applications and obtained patents relating to this type of dryer (see, for example, Patent Documents 1 and 2). 1(a), the conduction heat transfer dryer 2 comprises a rotary heat transfer section 22 that rotates within a main body shell 21, and a plurality of heating tubes 25 through which steam passes are equally arranged in an arc shape (circumferential shape) in the rotary heat transfer section 22. The material to be treated W is dried by indirectly heating the material to be treated W via the heating tubes 25 while rotating the rotary heat transfer section 22 with steam flowing through the heating tubes 25.

[0003] However, even such a dryer still has room for improvement in the following respects. That is, as described above, the conduction heat transfer dryer 2 effectively utilizes the internal heat transfer area to exert its capabilities, so it is necessary to eliminate localized high moisture areas (for example, 50% WB) as much as possible, and if localized excessive drying occurs and low moisture areas occur, the drying efficiency of the dryer as a whole will decrease, so many inlets for the workpieces W are provided inside the dryer. That is, in order to prevent high moisture areas, the inlets are dispersed, while the workpieces W are actively supplied to places where low moisture areas are expected, and the moisture content of the low moisture areas is increased, thereby improving the drying efficiency of the dryer as a whole. However, even if the location where the workpiece W should be fed is set with the aim of optimizing the drying efficiency, in reality, various changes occur inside the device, including fluctuations in the physical properties of the workpiece W, so the location set at the time of design often does not go as planned. In fact, after the dryer is installed, it is difficult to change the feeding location even if one wants to do so.

[0004] Here, as a conventional method for dispersing the materials W, there is a method using a pump such as a sludge pump and opening and closing a valve V, as shown in Fig. 6(a). There is also a method using a screw-type conveyor C and a discharge damper D, as shown in Fig. 6(b), in which the supply of the materials W is started or stopped by opening and closing the discharge damper D. Using these methods, the materials W are fed in small portions from an inlet 29', which is a dispersing point provided in the longitudinal direction of the dryer 2'.

[0005] The problems with such conventional methods will be described below. First, in the method using a pump such as a sludge pump, the method depends only on the size of the valve V and its arrangement (piping / flanges and inner diameter), so that it is possible to provide a large number of inlets with a relatively high degree of freedom and to select the valve V for supplying the material to be treated W. However, since the material to be treated W is supplied to the dryer 2' in a compressed state by the pump, there is a problem that it is prone to clumping and the clumps are difficult to disperse within the machine, and therefore the method was limited to sludge that could be pumped by a pump in the first place. In addition, although the method using the conveyor C and discharge damper D is less likely to cause consolidation, in order to supply the material W to be treated without impairing its dispersion as much as possible, the supply opening must be made wide. As a result, a larger space is required, including the flanges and other peripheral parts, than for the valve V, which limits the number of installation locations. In addition, once the loading position was determined at the design stage, it was not easy to change it later. In other words, if the loading position determined at the design stage was to be changed later, the main body shell 21' of the dryer 2' would need to be modified, and the discharge port of the conveyor C would need to be modified or the length of the conveyor C would need to be extended, which would require a relatively large range of modifications, making it difficult to change the position, and this was a problem. Furthermore, in the method of feeding the material W to be treated using the conveyor C, the conveyor C must be installed above the dryer 2', and other components such as a chute 12' and a discharge damper D are also required, which tends to increase the height of the entire facility, which is a problem. Furthermore, if the area where the materials are dispersed and fed into the dryer 2' is limited, this may cause a local increase in moisture content within the dryer 2', which may cause the dryer to become unable to operate. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 6000739 [Patent Document 2] JP 2006-17335 A Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention was made in recognition of this background, and its technical objective was to develop a new distributed feeding method that allows the inlet (material feeding inlet) of a conduction heat transfer dryer to be selected relatively freely, and that even if the inlet is once decided at the design stage, the position of the inlet can be changed thereafter with a relatively high degree of freedom. [Means for solving the problem]

[0008] First, the dispersion input device in the conduction heat transfer dryer according to claim 1 is A dispersion input device is provided on an upper portion of a conduction heat transfer dryer, the dispersion input device comprising a hollow main body shell provided in a fixed state and a rotary heat transfer part supported rotatably inside the main body shell, and the material to be treated is brought into contact with the heat transfer surface of the rotary heat transfer part to evaporate the moisture therein, This dispersion input device is provided with a dispersion conveyor on the upper part of the main body shell that can input the material to be treated into the main body shell, In addition, the dispersion conveyor and the main body shell are connected by a chute having a hollow shape in the longitudinal direction of the conduction heat transfer dryer, The chute serves as a feed path for the material to be treated, and the feed path includes a divided feed path that is divided into a plurality of paths in the longitudinal direction of the conduction heat transfer dryer; At least two separate entry routes, The present invention is characterized in that a drop control body is provided.

[0009] In addition, the dispersion input device in the conduction heat transfer dryer described in claim 2 has the following features in addition to those described in claim 1: The drop control body is provided at an upper opening of the chute, The drop control body also includes a damper plate that is horizontally disposed, and the damper plate is slid horizontally to move the drop control body between the dispersion conveyor and the main body shell. Split It is characterized in that it has a configuration for connecting or blocking the input path.

[0010] In addition, the dispersion input device in the conduction heat transfer dryer according to claim 3 has the following features in addition to those described in claim 1 or 2: Below the discharge port of the dispersion conveyor, a gap is provided between the dispersion conveyor and the main body shell at a position where the drop control body is not installed. Split This device is characterized by the provision of a fixed plate that constantly blocks the input path.

[0011] In addition, the dispersion input device in the conduction heat transfer dryer according to claim 4 has, in addition to the requirements of any one of claims 1 to 3, The drop control bodies provided at a plurality of locations in the conduction heat transfer dryer include those having different width dimensions.

[0012] In addition, the dispersion input device in the conduction heat transfer dryer according to claim 5 has the following features in addition to those described in claim 2: The dispersion conveyor is a screw conveyor having a spiral blade attached to the outer periphery of a rotating shaft, This screw conveyor and the damper plate are characterized in that they are disposed close to each other within a range in which the lower ends of the blades do not come into contact with the upper surface of the damper plate.

[0013] The dispersion input method for the conduction heat transfer dryer according to claim 6 is as follows: A method for feeding a workpiece into a conduction heat transfer dryer in which the workpiece is brought into contact with a heat transfer surface of a rotary heat transfer section that rotates within a hollow main body shell that is fixed in place, thereby evaporating moisture therefrom, comprising the steps of: A dispersing device having a dispersing conveyor is provided on the upper portion of the main body shell, In addition, the dispersion conveyor and the main body shell are connected by a chute having a hollow shape in the longitudinal direction of the conduction heat transfer dryer, The chute serves as a feed path for the material to be treated, and the feed path includes a divided feed path that is divided into a plurality of paths in the longitudinal direction of the conduction heat transfer dryer; At least two separate entry routes, A drop control body is provided, When inserting, the appropriate position In the divided injection route The drop control body is opened and closed to distribute and throw the objects from the distribution conveyor into the main shell.

[0014] In addition, the dispersion input method for the conduction heat transfer dryer according to claim 7 includes the following features in addition to the features according to claim 6: The drop control body slides a damper plate provided horizontally in the horizontal direction to move the drop control body between the dispersion conveyor and the main body shell. Split It is characterized by its ability to connect or block the input path. Effect of the Invention

[0015] First, according to the invention described in claim 1 or 6, when the objects to be treated are fed into the conduction heat transfer dryer, the objects can be fed by opening and closing the drop control body provided below the discharge port of the dispersion conveyor. Also, since the objects to be treated are fed by opening and closing the drop control body, the objects can be fed in a dispersed manner with a relatively high degree of freedom as long as they are at the position where the drop control body is installed, and even if it is desired to change the feeding position, the feeding position can be changed almost freely. In addition, according to the present invention, the dispersion conveyor and the main shell are connected by a hollow chute, and multiple drop control bodies are housed within this chute along the rotating heat transfer section. Therefore, even though the device has a compact configuration, the materials to be treated are not fed in discretely in the longitudinal direction of the dryer as in conventional devices, but can be fed continuously in the longitudinal direction at any desired position and accurately.

[0016] According to the invention described in claim 2, 5 or 7, the drop control body is configured to slide a horizontally installed damper plate in the horizontal direction to control the drop of the workpiece, or a screw conveyor is applied as a dispersion conveyor, and the lower end of the blade and the upper surface of the damper plate are configured to be close to each other without contacting each other, so that the center of gravity of the entire equipment can be kept low (stabilization of the center of gravity of the entire equipment). In other words, as a drop control body that performs the damping function, for example, there is a flap type that rotates a horizontal damper plate vertically to control the drop of the workpiece, but with such a flap type, it is unavoidable that the height dimension of the entire equipment becomes high by the amount of the damper plate being raised vertically, but this invention can prevent this.

[0017] Furthermore, according to the invention described in claim 3, a fixed plate is provided at a position where the drop control body is not installed, and by providing this fixed plate at a position where no dropping takes place, the structure of the device can be simplified. Furthermore, if the drop control body and the fixed plate are formed so as to be freely replaceable, it becomes even easier to change and select the dispersed throw-in positions.

[0018] In addition, according to the invention described in claim 4, the fall control bodies provided at multiple locations in the conduction heat transfer dryer include those with different width dimensions, so that more feeding ports can be formed and the treated materials can be fed in from more positions in a distributed manner than in the case where all the fall control bodies are formed with the same width dimensions. [Brief description of the drawings]

[0019] [Figure 1] 1A and 1B are a front view and a side view showing an example of a conduction heat transfer dryer equipped with a dispersion charging device of the present invention. [Diagram 2] 1A is a plan view mainly showing a dispersion input device, and FIG. 1B is a front view thereof. [Diagram 3] FIG. 2 is an exploded perspective view mainly showing the dispersion input device. [Figure 4] FIG. 1(a) is an explanatory diagram of an example configuration in which rails or rollers are provided to smoothly open and close the damper plate, or a scraping body is provided to remove materials accumulated on the rail, and FIG. 1(b) is an explanatory diagram showing an example configuration in which a fixed plate is provided in addition to a drop control body that can be opened and closed freely. [Diagram 5] FIG. 1A is an explanatory diagram showing an example configuration in which multiple fall control bodies have the same width dimension (longitudinal dimension of the dryer), and FIG. 1B is an explanatory diagram showing an example configuration in which the width dimensions (longitudinal dimension) of the fall control bodies are different. [Figure 6] 1A and 1B are plan and cross-sectional views showing two conventional charging methods. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] The present invention is embodied in the following examples, and also includes various methods that can be improved within the scope of the technical concept thereof. EXAMPLES

[0021] The dispersion and feeding device 1 (hereinafter simply referred to as the "dispersion and feeding device 1") in the conduction heat transfer dryer of the present invention is provided like a lid that covers the top of the conduction heat transfer dryer 2 (hereinafter simply referred to as the "dryer 2"), and the basic structure of the dryer 2 will first be described. The dryer 2 dries the workpiece (material) W such as sewage sludge, and its basic structure, as shown in FIG. 1 as an example, comprises a hollow main body shell 21 that is fixed (non-rotating), and a rotary heat transfer section 22 that is supported therein for free rotation. The rotary heat transfer section 22 is formed in a tube bundle shape with a plurality of heating tubes 25 evenly arranged in an arc shape (circumferential shape centered on the rotary shaft 23) between a pair of end plates 24 having a rotary shaft 23. To dry the workpiece W by the present dryer 2, the rotary heat transfer section 22 (tube bundle) is rotated while steam is flowing through the heating tubes 25, thereby indirectly applying heat (applying heat through the heating tubes 25) to the workpiece W received in the main body shell 21, and drying the workpiece W to a desired moisture content. As described above, the dryer 2 according to the present invention is an indirect heating type continuous conduction heat transfer dryer, and is also called an ITR (Inner Tube Rotary).

[0022] The rotating shaft 23 and the end plate 24 have passages formed therein for allowing steam to flow, and the steam flows in a dispersed manner from one of the rotating shaft 23 and end plate 24 into the heating tube 25, where it undergoes heat exchange and condenses to become drain. The drained steam is then transported to the outside of the dryer 2 via the other end plate 24 and the rotating shaft 23. Incidentally, the symbol 26 in the figure denotes a lifter that is provided in a protruding state in contact with the outside of the heating tube 25, and is intended to lift up the workpiece W that has been placed into the main shell 21 as the rotating heat transfer section 22 (tube bundle) rotates. Also, reference numeral 28 in the figure denotes a discharge port for discharging the workpiece W after drying, that is, the dried product.

[0023] Although not shown, moisture (water vapor), odorous components, other volatile components, dust, etc. (drying exhaust gas) are separated and released from the workpiece W during drying, and in order to efficiently discharge these gases outside the dryer 2, the main body shell 21 is provided with a carrier gas inlet for taking in heated outside air (heated outside air) and a carrier gas outlet for discharge. That is, the heated outside air introduced from the carrier gas inlet passes through the main body shell 21 and exits from the carrier gas outlet, entraining the moisture, odorous components, other volatile components, dust, etc. from the workpiece W.

[0024] As an example, as shown in FIG. 3, the dryer 2 has a rectangular opening in the upper part of the main body shell 21 in the longitudinal direction parallel to the rotary heat transfer section 22, and for example, this opening extends to the vicinity of both end faces of the dryer 2 in the longitudinal direction. The chute 12 of the dispersion charging device 1 is formed by four walls that are vertically raised from this opening, and the upper opening of this chute 12 becomes the receiving port (material receiving port) 29 of the dryer 2. The dispersion charging device 1 described above is attached here in a placed state. If it is clear that there is no need to supply the workpiece W to the longitudinal side of the dryer 2, there is no need to provide the chute 12 in that range. For example, there are cases where it is not necessary to open the chute 12 to the vicinity of both end faces of the longitudinal side of the dryer 2.

[0025] Next, the distribution input device 1 will be described. As described above, the dispersion feeding device 1 is provided like a lid that covers the top of the dryer 2, and as an example, as shown in Figures 1 to 3, comprises a conveyor 11 that transports the workpiece W above the dryer 2 along the longitudinal direction of the dryer 2, the chute 12 that connects the conveyor 11 and the main shell 21, and a drop control body 13 that is provided between the conveyor 11 and the chute 12 and controls the feeding (supply) of the workpiece W into the dryer 2. In this specification, since the "conveyor 11" is a conveyor that distributes and feeds the workpiece W into the dryer 2, this conveyor may be particularly referred to as a "distribution conveyor 11." We will now explain the directions. The longitudinal direction of the dryer 2 means the direction of transport of the dispersion conveyor 11, and is sometimes referred to as the left-right direction. However, when viewed as the drop control body 13, this left-right direction is referred to as the width direction, and the horizontal direction perpendicular to the transport direction of the dispersion conveyor 11 is referred to as the front-rear direction, and in particular the damper plate 131 described later slides in this front-rear direction.

[0026] Each of the components constituting the dispersion feeding device 1 will be described below. The dispersion conveyor 11 is, for example, a screw conveyor, which is configured by attaching a spiral blade 112 to the outer periphery of a rotating shaft 111. Further, the dispersion conveyor 11 is provided with a chute 113, and the transport of the workpieces W to this chute 113 is carried out via a separate belt conveyor or the like. Here, reference numeral 14 in the drawing denotes a discharge port (material outlet) for the workpieces W formed below the dispersion conveyor 11. Incidentally, the discharge port 14 of the dispersion conveyor 11 is directly connected to a receiving port (material receiving port) 29 for the workpieces W from the dryer 2. The distribution conveyor 11 is not necessarily limited to the screw conveyor shown in FIG. 3, and a shaftless screw conveyor may also be used.

[0027] Next, the chute 12 will be described. The chute 12 guides the materials W discharged from the dispersing conveyor 11 into the dryer 2, and is provided at the top of the dryer 2 along the longitudinal direction of the dispersing conveyor 11, i.e., the dryer 2. In particular, in this embodiment, as shown in FIG. 1(b) as an example, the chute 12 is provided above the materials W being scraped up in the dryer 2. 3, the chute 12 is formed in a generally rectangular tubular shape that is hollow over almost the entire area in the longitudinal direction of the dispersion conveyor 11. Therefore, the materials W that fall from the dispersion conveyor 11 fall into the dryer 2 via the chute 12. In other words, the chute 12 that connects the dispersion conveyor 11 to the dryer 2 serves as a feed path 15 that drops and introduces the materials W into the dryer 2. The input path 15 is divided into a plurality of paths in the longitudinal direction of the dryer 2, and each divided path is a divided input path 15a. The drop control body 13 is provided in at least a plurality of divided input paths 15a, i.e., two or more divided divided input paths 15a, and the drop control body 13 connects or disconnects the divided input paths 15a. With this structure, in the present invention, the inlet for the workpiece W into the dryer 2, in other words the input path 15 formed by the hollow chute 12, is divided (dispersed). Even after the input port has been determined, the position of the input port (dispersed input port) can be changed with a relatively high degree of freedom. In addition, reference numeral 16 in the figure denotes an inspection cover (inspection hatch) that is opened and closed when performing maintenance and inspection of the input path 15.

[0028] Next, the fall control body 13 will be described in more detail. The drop control body 13 controls the drop of the workpiece W in each divided input path 15a, which is each of the finely partitioned input ports, and, as an example, as shown in Figures 1 to 3, comprises a damper plate 131 that effectively connects or blocks the divided input path 15a, and a drive shifter 132 that moves the damper plate 131 in the forward / backward direction to open or close the divided input path 15a. In this embodiment, the opening and closing operation of the damper plate 131 is performed by moving the damper plate 131 horizontally, so that the fall control body 13 has a rail 133 that supports the damper plate 131 so that it can slide freely, as shown in Figures 3 and 4, for example. Furthermore, since the damper plate 131 is structured to move horizontally in the front-rear direction, the height dimension of the entire equipment can be reduced, and the center of gravity of the equipment can be kept low. Of course, if there is no particular restriction on the height dimension of the equipment, a flap type that opens and closes the division input path 15a by rotating the damper plate 131 in the vertical direction can also be applied. In this embodiment, as shown in Fig. 1 to Fig. 3, the feed path 15 is divided into three divided feed paths 15a, and therefore three fall control bodies 13 are also provided in series. For the sake of convenience, the three fall control bodies 13 are referred to as "13A", "13B", "13C", etc., starting from the fall control body 13 on the left side of Fig. 1(a).

[0029] Each member constituting the fall control body 13 will be described below. First, as shown in FIG. 1(b), as an example, the damper plate 131 is composed of a horizontal plate portion 131a and a vertical plate portion 131b connected in a hanging state to the rear portion of the horizontal plate portion 131a, and is formed so as to form an L-shape as a whole when viewed from the side, and the drive shifter 132 is attached to the rear vertical plate portion 131b. 1(b), the upper surface of the plate portion 131a is in close proximity to the lower ends of the blades 112 when the plate portion 131a is closed, as will be described later in detail. That is, the plate portion 131a and the blades 112 are placed as close to each other as possible, provided that the lower ends of the plate portion 131a and the blades 112 do not come into contact with each other when the dispersion conveyor 11 is moved while the workpieces W are being transported or without the workpieces W present.

[0030] The damper plate 131 is configured so that when the slider of the drive shifter 132 is extended, the horizontal plate portion 131a blocks the divided input path 15a, and when the workpiece W is dropped in, the slider of the drive shifter 132 is contracted to retract the horizontal plate portion 131a that was blocking the divided input path 15a, allowing the workpiece W to be dropped in through the opened divided input path 15a. In addition, when it is necessary to reinforce the damper plate 131, which is L-shaped when viewed from the side, it is possible to provide a vertical wall-shaped plate portion 131c near both ends of the damper plate 131, more specifically in a position that does not contact the rail 133 described later. The driving shifter 132 may be a hydraulic cylinder, an air cylinder, a motor cylinder, or the like.

[0031] Next, the rail 133 will be described. The rail 133 is for smoothly sliding the damper plate 131 when opening and closing while stably holding the damper plate 131. For example, as shown in Fig. 4, the rail 133 slides against the lower surface of the plate portion 131a with a metal touch, or a resin plate with a low friction coefficient is provided on the lower surface, but in order to slide the damper plate 131 even more smoothly, it is preferable to provide a rotatable roller (wheel) 134 on the lower part of the damper plate 131 and slide the damper plate 131 while rolling the roller 134 on the rail 133, as shown in the enlarged upper view of Fig. 4(a), for example, so that the damper plate 131 can be opened and closed even more smoothly. Of course, in addition to the roller 134, a linear slider, a roller, or the like can be used. As another mechanism using wheels 134, for example, as shown in the enlarged bottom view of FIG. 4(a), wheels 134 can be installed in a horizontally protruding state from a boundary plate 136 described later, and the rotatable outer wheel of the wheels 134 can support and slide against the underside of the plate portion 131a.

[0032] When the damper plate 131 is opened, the material W to be treated, such as sludge, accumulates on the rail 133. Therefore, as shown in the partial perspective view of FIG. 4(a) as an example, it is preferable to provide a scraper 137 with its lower end protruding close to the upper part of the rail 133 at the lower end of both ends of the damper plate 131, more specifically, at the lower end of the plate parts 131a and 131c, in an inclined state, so that the scraper 137 can efficiently scrape off the material W to be treated that has accumulated on the rail 133 when the damper plate 131 is closed. That is, the material W to be treated that has accumulated on the rail 133 can be brushed off by the operation of the damper plate 131 when it is closed, that is, by the movement of the scraper 137, and the brushed off material W to be treated falls into the main body shell 21 below. Incidentally, the scraper 137 is also shown by imaginary lines in the enlarged perspective view of FIG. 3.

[0033] In addition, the reference numeral 136 in the figure denotes a boundary plate provided to separate each divided input path 15a which serves as a dispersed input port. By providing such a boundary plate 136, the chute 12 formed in a hollow shape in the longitudinal direction of the dryer 2, i.e., the input path 15, is divided into a plurality of fine input ports. Split It can be partitioned off while being adjacent to the input path 15a. The upper end of the boundary plate 136 is set so as to be at the same height as the upper surface of the plate portion 131a when the damper plate 131 is closed, and the lower end is arranged so as to protrude into the inside of the main body shell 21 without contacting the upper portion of the main body shell 21 or the rotating heat transfer portion 22, and is formed in a curved or arc shape similar to the curved surface of the upper portion of the main body shell 21. Multiple drop control bodies 13 can be installed in a continuous state, and this boundary plate 136 enables the workpiece W to be accurately dropped onto the rotating heat transfer section 22 directly below the drop control body 13 that has been opened.

[0034] The dispersion feeding device 1 of the present invention has the basic structure as described above, and below, we will explain the operating mode of applying this dispersion feeding device 1 to disperse and feed the workpiece W into the dryer 2, and also explain an example of operation of the dispersion feeding method. It is assumed that three fall control bodies 13 are provided, and the fall control bodies 13 are designated as 13A, 13B, and 13C as shown in FIG. 1(a). Before the start of distributed throwing, each divided throwing path 15a is closed in all the fall control bodies 13A to 13C. That is, in all the fall control bodies 13A to 13C, the sliders of the drive shifters 132 are extended, and each divided throwing path 15a is blocked by the damper plate 131 to be in a closed state.

[0035] (1) Opening and closing of the damper plate 131 of the fall control body 13A First, the damper plate 131 of the fall control body 13A is opened, and the workpieces W are fed into the dryer 2 from the feed opening, i.e., the divided feed path 15a located on the left side of Fig. 1(a). The operation of opening the damper plate 131 is to contract the slider of the drive shifter 132, to move the damper plate 131 of the fall control body 13A out of the divided feed path 15a, and to connect the divided feed path 15a to the receiving inlet 29. Then, after the damper plate 131 of the fall control body 13A is opened for an appropriate time, the damper plate 131 of the fall control body 13A is closed to end the material feeding from this position. The operation of closing the damper plate 131 extends the slider of the drive shifter 132, and the damper plate 131 of the fall control body 13A blocks the divided feeding path 15a. Incidentally, the opening time (open duration) and closing time (closed maintenance time) of the damper plate 131 of the fall control body 13A can be set using a programmable controller (PLC) or the like installed in a control panel not shown.

[0036] (2) Opening and closing of the damper plate 131 of the fall control body 13B After closing the damper plate 131 of the fall control body 13A in this manner, the damper plate 131 of the fall control body 13B is opened for an appropriate period of time and then closed. Note that the opening and closing operation of the damper plate 131 at this time is the same as that of the damper plate 131 of the fall control body 13A.

[0037] (3) Opening and closing of the damper plate 131 of the fall control body 13C After closing the damper plate 131 of the fall control body 13B as described above, the damper plate 131 of the fall control body 13C is opened for an appropriate time and then closed. The opening and closing operation of the damper plate 131 at this time is the same as that of the damper plate 131 of the fall control body 13A.

[0038] (4) Opening and closing of the damper plate 131 of the fall control body 13A After closing the damper plate 131 of the fall control body 13C in the above manner, the process returns to the beginning and the damper plate 131 of the fall control body 13A is opened again for an appropriate period of time and then closed. Hereinafter, such an opening and closing operation of the damper plate 131 is repeated in sequence for the three drop control bodies 13A to 13C, and this is set by a PLC, etc. As a result, the input position of the material W to be treated into the dryer 2 is also changed in sequence from left side → center → right side → ... in Fig. 1(a). It is not necessary to set the opening times of the damper plates 131 of the fall control bodies 13A to 13C to the same time, and for example, they can be changed for each throw-in position. Then, when all the drying operations are completed, the damper plates 131 of the drop control bodies 13A to 13C are all closed, and the dried objects W to be treated are discharged from the discharge port 28 of the dryer 2.

[0039] Incidentally, in the above description, the three drop control bodies 13 are opened and closed in sequence, but the input mode is not necessarily limited to this, and various modes can be adopted depending on the settings in the PLC, etc. Specifically, for example, in the case where material is not input from the central input port (split input path 15a) in FIG. 1(a), the central drop control body 13B can be kept (set) in a closed state at all times, and only the drop control bodies 13A and 13C on both the left and right sides can be opened and closed alternately. Alternatively, a input mode can be adopted in which the drop control bodies 13A, 13B, or 13C above the area in the dryer 2 where the moisture content of the workpiece W is low are preferentially opened for a long time, or, conversely, a input mode can be adopted in which the drop control bodies 13A, 13B, or 13C above the area in the dryer 2 where the moisture content of the workpiece W is high are closed for a long time. In addition, the chute 113 in the dispersion conveyor 11 can be provided in the center of the dispersion conveyor 11, and the forward and reverse rotation of the rotating shaft 111 (blade 112) can be combined with the opening and closing of the drop control body 13A, 13B or 13C to supply the workpieces W to the optimal position in the dryer 2.

[0040] Other Examples The present invention is based on the above-described embodiment as one basic technical concept, but the following modifications can be considered. First, in the basic embodiment described above, all divided feed paths 15a are provided with openable and closable damper plates 131. However, in cases where the positions (divided feed paths 15a) at which the workpieces W are not fed are determined in advance, it is possible to provide a fixed plate 135 instead of the slidable damper plate 131, as shown in Fig. 4(b), for example. Incidentally, in the configuration example of Fig. 4(b), a fixed plate 135 is provided in the central divided feed path 15a to prevent material feeding from being performed from here. Of course, in order to prevent material from being fed at a certain position, the slidable damper plate 131 can be kept closed rather than opened as described above. Since the fixed plate 135 does not move like the damper plate 131, it is conceivable that the workpiece W may become stuck or adhere to the upper part of the fixed plate 135. In that case, however, after the drying operation is completed, the workpiece W can be removed and cleaned through an inspection hatch (inspection cover 16) provided on the chute 12.

[0041] In the basic embodiment described above, three fall control bodies 13 are basically provided, but any number of fall control bodies 13 may be provided as long as it is two or more. Specifically, for example, as shown in Fig. 5(a), it is possible to provide four fall control bodies 13. Of course, if the number of fall control bodies 13 is increased, the number of input ports increases accordingly, and the workpieces W can be input while being more dispersed. Further, the multiple drop control bodies 13 do not necessarily have to be formed to have the same width, and some of the multiple drop control bodies 13 may have different widths. That is, Fig. 5(b) is a configuration example in which the widths of some of the drop control bodies 13 are narrower than in Fig. 5(a), and the number of drop control bodies 13, i.e., the number of insertion openings, is increased. [Explanation of symbols]

[0042] 1. Distributed feeding device (distributed feeding device for conduction heat transfer dryer) 2 Dryer (conduction heat transfer dryer) 11 Distributed conveyor (conveyor) 12 SHOTS 13 Fall control body (13A, 13B, 13C...) 14 Outlet 15 Input route 15a Split input route 16 Inspection cover 21 Body shell 22 Rotating heat transfer section (tube bundle) 23 Rotation axis 24 End Plate 25 Heating tube 26 Lifter 28 Outlet 29 Receiving port (material receiving port) 111 Rotation axis 112 Feather 113 SHOTS 131 Damper plate 131a Plate section (horizontal plate section) 131b Plate section (vertical plate section) 131c Plate section (vertical wall-shaped plate section) 132 Drive shifter 133 Rail 134 Wheel 135 Fixed plate 136 Boundary plate 137 Scraping Body C Conveyor D Discharge Damper V-Valve W Processing object (material)

Claims

1. A dispersion input device is provided on an upper portion of a conduction heat transfer dryer, the dispersion input device comprising a hollow main body shell provided in a fixed state and a rotary heat transfer part supported rotatably inside the main body shell, and the material to be treated is brought into contact with the heat transfer surface of the rotary heat transfer part to evaporate the moisture therein, This dispersion input device is provided with a dispersion conveyor on the upper part of the main body shell that can input the material to be treated into the main body shell, In addition, the dispersion conveyor and the main body shell are connected by a chute having a hollow shape in the longitudinal direction of the conduction heat transfer dryer, The chute serves as a feed path for the material to be treated, and the feed path includes a divided feed path that is divided into a plurality of paths in the longitudinal direction of the conduction heat transfer dryer; A dispersion feeding device for a conduction heat transfer dryer, characterized in that a drop control body is provided in at least two or more divided feeding paths.

2. The drop control body is provided at an upper opening of the chute, The dispersion input device in a conduction heat transfer dryer as described in claim 1, characterized in that the drop control body is equipped with a damper plate arranged horizontally, and this damper plate is slid horizontally to connect or block the divided input path between the dispersion conveyor and the main body shell.

3. A dispersion input device for a conduction heat transfer dryer as described in claim 1 or 2, characterized in that a fixed plate is provided below the discharge outlet of the dispersion conveyor at a position where the drop control body is not installed, which always blocks the divided input path between the dispersion conveyor and the main shell.

4. The dispersion input device for a conduction heat transfer dryer according to any one of claims 1 to 3, characterized in that the drop control bodies provided at multiple locations in the conduction heat transfer dryer include ones with different width dimensions.

5. The dispersion conveyor is a screw conveyor having a spiral blade attached to the outer periphery of a rotating shaft, 3. The dispersion and feeding device for a conduction heat transfer dryer according to claim 2, wherein the screw conveyor and the damper plate are arranged close to each other within a range where the lower ends of the blades do not come into contact with the upper surface of the damper plate.

6. A method for feeding a workpiece into a conduction heat transfer dryer in which the workpiece is brought into contact with a heat transfer surface of a rotary heat transfer section that rotates within a hollow main body shell that is fixed in place, thereby evaporating moisture therefrom, comprising the steps of: A dispersing device having a dispersing conveyor is provided on the upper portion of the main body shell, In addition, the dispersion conveyor and the main body shell are connected by a chute having a hollow shape in the longitudinal direction of the conduction heat transfer dryer, The chute serves as a feed path for the material to be treated, and the feed path includes a divided feed path that is divided into a plurality of paths in the longitudinal direction of the conduction heat transfer dryer; A drop control body is provided in at least two or more divided input paths, This method of distributing and feeding the materials in a conduction heat transfer dryer is characterized in that, when feeding the materials, a drop control body is opened and closed in a divided feeding path at an appropriate position to disperse and feed the materials from the distribution conveyor into the main shell.

7. The method for dispersing and feeding in a conduction heat transfer dryer according to claim 6, characterized in that the drop control body slides a damper plate arranged horizontally in a horizontal direction to connect or block the divided feeding path between the dispersion conveyor and the main shell.

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