Operating method of horizontal continuous conduction heat transfer dryer

Abstract

To provide a novel horizontal continuous conductive heat transfer type dryer capable of maintaining a constant feed rate of a treated object being fed into the horizontal continuous conductive heat transfer type dryer, in a facility provided with an incinerator or the like which is disposed downstream of the horizontal continuous conductive heat transfer type dryer and uses a dried material discharged from the horizontal continuous conductive heat transfer type dryer as fuel, and an operation method therefor.SOLUTION: The operation method for a horizontal continuous conductive heat transfer type dryer is characterized by analyzing drying conditions according to the temperature of a treated object P measured by a temperature sensor 13 installed in a body shell 10, and performing an operation of feeding a prescribed amount of the treated object P into a feed port 101 preset for every mode corresponding to the analysis of the drying conditions, to maintain the amount of the treated object P being fed to the body shell 10 per unit time constant.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a horizontal continuous conduction heat transfer dryer suitable for drying materials such as mud, cake, powder, and granules, and particularly to a horizontal continuous conduction heat transfer dryer of the machine and an operation method thereof that can keep the input amount of the object to be processed constant.

Background Art

[0002] Recently, efforts for environmental protection have been actively carried out. For companies and the like, general waste such as food waste and food processing residues, as well as sewage sludge, etc. are dried and concentrated to reduce the amount and prevent spoilage, and then recycled or disposed of.

[0003] As one of the devices used for drying such sludge, etc., there is a horizontal continuous conduction heat transfer dryer 1'. As shown in FIG. 10, for example, this device is provided with multi-tubular heating tubes 11' in a main body shell 10', and the multi-tubular heating tubes 11' are rotated while allowing heating steam to flow through their interiors, and the object to be processed P is brought into contact with this to evaporate moisture (see, for example, Patent Document 1). The object to be processed P supplied into the main body shell 10' from the inlet 101' is scraped up by the lifter 117' and moves toward the overflow port 102' side while drying progresses, and is discharged to the outside through the duct 107' from the overflow port 102' in the state of becoming the dried product D.

[0004] Such a horizontal continuous conduction heat transfer dryer 1' is provided with inlets 101' (five inlets 101a' to 101e' in FIG. 10) at a plurality of locations along the longitudinal direction of the main body shell 10'. By changing the input distribution of the object to be processed P to each inlet 101', the moisture value of the object to be processed P staying in the main body shell 10' while touching the multi-tubular heating tubes 11' is adjusted, and an operation is performed to keep the moisture value of the dried product D discharged from the horizontal continuous conduction heat transfer dryer 1' at a predetermined value. The supply of the object to be processed P to each of the above input ports 101' is performed by the feeding by a supply conveyor (not shown) and the opening / closing operation of a damper (not shown) provided between the supply conveyor and the input port 101'. The opening / closing operation of the damper is carried out by timer setting. Regarding this timer setting, the operator checks the operating state based on the information from a temperature sensor (not shown) installed inside the main body shell 10' and changes the set value.

[0005] Also, when a situation where drying becomes impossible occurs during operation due to a change in such timer setting, the operator reduces the input amount setting of the object to be processed P and continues the operation. However, when the overall heat transfer coefficient decreases due to the apparent density, moisture fluctuation, etc., the moisture of the retained products inside the dryer increases, adhesion occurs, and drying becomes impossible, the input of the object to be processed P is suspended, the retained products inside the dryer are heated, dried to an operable moisture level, and then re-input.

[0006] When operating such a horizontal continuous conduction heat transfer dryer 1', if a combustion furnace or the like that uses the dried product D discharged from the horizontal continuous conduction heat transfer dryer 1' as fuel is arranged at the subsequent stage, the operating rate of the combustion furnace or the like will decrease according to the operating situation of the horizontal continuous conduction heat transfer dryer 1'.

[0007] In the existing horizontal continuous conduction heat transfer dryer 1' as described above, in order to prevent the short path of the object to be processed P at the overflow port 102', the most downstream input port 101e' is installed at a certain distance (about 1000 mm) away from the overflow port 102'.

Prior Art Documents

Patent Documents

[0008]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0009] The present invention has been made under such a background. In a facility where a combustion furnace or the like that uses the dried product discharged from a horizontal continuous conduction heat transfer dryer as fuel is arranged after the horizontal continuous conduction heat transfer dryer, the moisture content of the dried product is changed within the allowable range of the subsequent equipment, and the input amount of the object to be processed into the horizontal continuous conduction heat transfer dryer can be kept constant. A novel horizontal continuous conduction heat transfer dryer of the machine has the technical problem of developing an operation method.

Means for Solving the Problems

[0010] That is, the operation method of the horizontal continuous conduction heat transfer dryer described in claim 1 is as follows: A shaft body provided with a heat transfer member is arranged in the main body shell, and heating steam is passed through and rotated inside this shaft body. The object to be processed introduced into the main body shell is brought into contact with the heat transfer member that rotates together with the shaft body while being retained in the main body shell to obtain a dried product of the object to be processed. The operation of a horizontal continuous conduction heat transfer dryer method is as follows: A plurality of piece feeding ports are formed at multiple locations in the upper part of the main body shell, and temperature sensors are installed in the main body shell below these feeding ports. These temperature sensors The temperature range is determined based on the temperature condition that matches the detected value of the piece, and the explain the state. According to the obtained state explanation which is preset For each mode, an operation is performed in which a preset amount of the object to be processed is introduced into a preset feeding port. While the moisture content of the object to be processed in the main body shell is in an over-dried state, Furthermore, by introducing the object to be processed from the feeding port formed near the discharge port, the moisture value of the dried product discharged from the main body shell is changed within the allowable range of the equipment installed after the horizontal continuous conduction heat transfer dryer and , and the input amount of the object to be processed per unit time into the main body shell is kept constant. This is the gist of the present invention.

[0011] Also, claim 2The method for operating the horizontal continuous conduction heat transfer dryer described in the claims 1 In addition to the requirements listed above, When a preset amount of material to be treated is fed into the preset feed port, the time for feeding the material to the desired feed port by the feed conveyor or pump is set by a timer.

[0012] Also, claims entry 3 The method of operating the horizontal continuous conduction heat transfer dryer described above is as follows: 1 or entry 2 In addition to the requirements listed above, The mode according to the state description increases or decreases the input ratio to the input port, which measures the temperature before and after the input port, A feature of this device is that the amount of material put into an inlet formed near the outlet is set to increase or decrease in accordance with this increase or decrease.

[0013] Also, claims 4 The method for operating the horizontal continuous conduction heat transfer dryer described in the claims any one item from 1 to 3 In addition to the requirements listed above, The amount of liquid supplied to a specific one of the above-mentioned inlets is set to the same value in all modes.

[0014] Further, claims 5 The method for operating the horizontal continuous conduction heat transfer dryer described in the claims any one item from 1 to 4 In addition to the requirements listed above, The amount of material supplied to the inlet formed near the outlet is characterized in that it is always the same in each mode.

[0015] Further, claims 6 The method for operating the horizontal continuous conduction heat transfer dryer described in the claims any one item from 1 to 5 In addition to the requirements listed above, The horizontal continuous conduction heat transfer dryer is characterized in that it is an apparatus equipped with a heat pipe bundle as a heat transfer member.

[0016] Further, claims 7The operation method of the horizontal continuous conduction heat transfer dryer described is, in addition to the requirements described in claim 6 in addition to the requirements described in claim the charging port formed near the discharge port is formed above the end plate provided at the end of the heat pipe bundle, which is characterized by being formed as such.

[0017] Furthermore, the operation method of the horizontal continuous conduction heat transfer dryer described in claim 8 is, in addition to the requirements described in the above claim any one item from 1 to 5 in addition to the requirements described in claim the horizontal continuous conduction heat transfer dryer is a device having a plurality of paddles along the longitudinal direction of the shaft body as a heat transfer member, which is characterized by being formed as such. And the problems are solved by using the configurations of the inventions described in these respective claims as means.

Effects of the Invention

[0018] First, according to the invention described in claim 1 by making the moisture of the object to be processed in the main body shell in an over-dried state, it is possible to surely prevent the adhesion of the object to be processed to the heat transfer member, and by changing the moisture value of the dried product within the allowable range of the equipment provided in the subsequent stage, the input amount of the object to be processed into the horizontal continuous conduction heat transfer dryer can be kept constant, and it is possible to avoid causing an obstacle to the operation of the equipment provided in the subsequent stage. Moreover, according to the present invention, the state description is made more detailed, and the mode preset according to each state description is also made more detailed, so that a more delicate drying process can be realized according to the situation.

[0019] Also, according to the invention described in claim 2 it is possible to always make the supply to the object to be processed at each charging port appropriate even when the operator changes.

[0020] Also, according to the invention described in claim 3 by increasing or decreasing the input ratio of the object to be processed to the 1st to 3rd charging ports from the front side, for example, and increasing or decreasing the input ratio of the object to be processed to the last charging port, for example, the moisture value of the dried product can be adjusted to a desired value.

[0021] Furthermore, according to claim 4 , 5According to the described invention, the input amount of the object to be processed into the horizontal continuous conduction heat transfer dryer can be kept constant without overly complicating the control.

[0022] Furthermore, claim 6 According to the described invention, a horizontal continuous conduction heat transfer dryer equipped with a heat pipe bundle as a heat transfer member can be applied without problems to a facility where a combustion furnace or the like that uses the dried product discharged from the horizontal continuous conduction heat transfer dryer as fuel is arranged at the subsequent stage.

[0023] Furthermore, claim 7 According to the described invention, adhesion of the object to be processed to the heat pipe bundle can be reliably avoided.

[0024] Furthermore, claim 8 According to the described invention, a horizontal continuous conduction heat transfer dryer equipped with paddles as heat transfer members can be applied without problems to a facility where a combustion furnace or the like that uses the dried product discharged from the horizontal continuous conduction heat transfer dryer as fuel is arranged at the subsequent stage.

Brief Description of the Drawings

[0025]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Best Mode for Carrying Out the Invention

[0026] The horizontal continuous conduction heat transfer dryer of the present invention of the machine The best mode of the operation method is as shown in the following examples, but it is also possible to make appropriate changes within the scope of the technical idea of the present invention for these examples.

Examples

[0027] Hereinafter, the present invention relating to After explaining the horizontal continuous conduction heat transfer dryer 1 and peripheral equipment of the present invention, the operation method thereof will be explained. First, the horizontal continuous conduction heat transfer dryer 1 is a device suitable for drying an object to be processed P such as mud, cake, powder, and granules, and is a device for obtaining a dried product D by retaining the volatile components such as moisture contained in the object to be processed P while evaporating them. As shown in FIGS. 1 to 3, this device has a multi-tube heating pipe 11 provided in a main body shell 10 provided on a machine frame F, and the multi-tube heating pipe 11 is rotated while flowing steam as a heating medium inside it, and the object to be processed P is retained in the main body shell 10 and brought into contact with the multi-tube heating pipe 11 to perform drying.

[0028] The main body shell 10 is a hollow member having an elliptical cross-section as an example, and an inlet 101, an overflow port 102, a carrier gas port 103, and an exhaust port 104 are formed. Hereinafter, in this specification, the overflow port 102 side (right side in FIGS. 1 to 3) will be referred to as "rear" and "backward", and the opposite side will be referred to as "front" and "forward". Here, the inlet 101 is a plurality of in the upper part of the main body shell 10 pieceIt is formed in the place, and as an example, in Fig. 2, a first inlet 101a is formed in front of the carrier gas port 103 formed in the upper front part of the main body shell 10. And between the carrier gas port 103 and the exhaust port 104 formed in the upper rear part of the main body shell 10, a second inlet 101b, a third inlet 101c, a fourth inlet 101d, and a fifth inlet 101e are formed. Further, a sixth inlet 101f is formed behind the exhaust port 104.

[0029] Also, in this embodiment, the sixth inlet 101f is near the discharge port 107a to be described later, substantially near the overflow port 102, and is installed so as to be located above the rear mirror plate 112 in the multi-tubular heating tube 11. Note that the installation piece position of these inlets 101, the carrier gas port 103, and the exhaust port 104

[0030] And above the inlet 101, as an example, a supply conveyor 12 in which a screw 121 is provided in a trough 120 is arranged, and discharge ports 122a to 122f formed in the lower part of the trough 120 and the inlets 101a to 101f are connected by supply pipes 123a to 123f. Also, among the supply pipes 123a to 123f, dampers 124b to 124e are provided inside the supply pipes 123b to 123e. And the object to be processed P input into the supply conveyor 12 from the inlet 125 formed in the upper part of the trough 120 is input into the inlet 101a through the supply pipe 123a from the discharge port 122a and then into the main body shell 10 when the screw 121 rotates forward with the dampers 124b to 124e closed. On the other hand, when the screw 121 rotates reversely with the dampers 124b to 124e closed, the object to be processed P is input into the inlet 101f through the supply pipe 123f from the discharge port 122f and then into the main body shell 10. When feeding the object to be processed P into any of the inlets 101b to 101e, it can be fed by opening a desired one of the dampers 124b to 124e and appropriately rotating the screw 121 forward and backward. Note that the forward and reverse rotations of the screw 121 and the opening and closing operations of the dampers 124b to 124e are controlled using, for example, a programmable logic controller (hereinafter abbreviated as PLC) in the control panel, although not shown in the drawings. Also, the forward and reverse rotation times of the screw 121 and the opening and closing operation times of the dampers 124b to 124e are set by the timer function set in this PLC. The time set for the specific timer is changed and set according to the supply amount of the object to be processed P and the specifications of the supply conveyor 12. Also, the percentage display of the input amount of the object to be processed P described later represents the substantial weight of the object to be processed P input from each inlet 101a to 101f as a percentage based on the time setting of each timer.

[0031] Also, the main body shell 10 and the multi-tubular heating pipe 11 are installed in the machine frame F in a horizontal state or installed in the machine frame F with a slight inclination such that the overflow port 102 side is somewhat lower. Furthermore, the main body shell 10 has a double jacket structure, and a steam passage path is formed from the steam supply port 105 formed near the inlet 101a to the drain port 106 formed below the overflow port 102, and a configuration is adopted that can raise the temperature inside the main body shell 10. Note that instead of such a double jacket structure, trace piping or the like can also be installed.

[0032] Also, as shown in FIGS. 2 and 3, the overflow port 102 can be formed with a desired height dimension by closing a rectangular opening formed in the main body shell 10 with a plurality of plate members 102b having a width of about a dozen centimeters or so in order from the bottom to the top. Since such a configuration is adopted, if the plate members 102b are stacked high, the opening of the overflow port 102 will only open narrowly at the top, so the retention amount of the object to be processed P inside the main body shell 10 will increase. Conversely, if there are fewer plate members 102b, the opening will widen, and the retention amount of the object to be processed P inside the main body shell 10 will decrease.

[0033] Also, a duct 107 is externally provided so as to cover the overflow port 102, and a rotary valve 108 is provided in front of a discharge port 107a formed at the lower part of the duct 107. Of course, a double damper discharge device or the like may be provided instead of the rotary valve 108.

[0034] Also, the multi-tubular heating tube 11 includes end plates 112 on both sides of a heat transfer tube bundle 116 as a heat transfer member formed by arranging a plurality of tubes in a cylindrical shape, and a shaft body 113 is provided at the center of the end plate 112. The shaft body 113 is rotatably supported by a bearing block 114 provided in the machine frame F. A motor M is provided for the machine frame F as a driving device for rotating the multi-tubular heating tube 11. Rotary joints 115 (115a, 115b) are attached to both ends of the shaft body 113 and are connected to the heat transfer tube bundle 116. A sealing mechanism for blocking the outside air is provided between the shaft body 113 and the main body shell 10. A plurality of lifters 117 and a large number (12 in this embodiment) of angles 111 to which feed vanes 118 having appropriate angles are attached are provided on the side circumferential portion of the heat transfer tube bundle 116. By these, the object to be processed P is scraped up and comes into contact with the heat transfer tube bundle 116 and advances from the inlet 101 side to the overflow port 102 side.

[0035] Furthermore, probe insertion tubes 109a to 109f are provided on the peripheral surface of the main body shell 10, and probes of temperature sensors 13a to 13f such as thermocouples are inserted into the main body shell 10 from here so that the temperature of the object to be processed P at various locations in the main body shell 10 can be measured. In this embodiment, the temperature sensor 13a and the temperature sensor 13b are arranged at the front and rear positions immediately below the inlet 101a. Also, the temperature sensor 13c and the temperature sensor 13d are arranged at the front and rear positions immediately below the inlet 101b. Furthermore, the temperature sensor 13d and the temperature sensor 13e are arranged at the front and rear positions immediately below the inlet 101c. Furthermore, the temperature sensor 13f is arranged between directly below the charging port 101e and directly below the charging port 101f.

[0036] Although not shown in the drawings, a steam generation device is provided in parallel with the horizontal continuous conduction heat transfer dryer 1, and an appropriate device such as a U-shaped, straight tube-shaped, or helical coil-shaped device is applied. Then, a pipeline is connected from this steam generation device to the rotary joint 115a and the steam supply port 105 in the horizontal continuous conduction heat transfer dryer 1. Also, the carrier gas is supplied into the main body shell 10 from the carrier gas port 103. Then, the volatile components volatilized from the object to be processed P by the heating of the multi-tube heating tube 11 are carried out of the main body shell 10 through the exhaust port 104 by the carrier gas. Since the carrier gas contains fine powder generated from the object to be processed P in addition to the volatile components, a dust removal device (not shown) may be provided on the flow path of the carrier gas after the exhaust port 104.

[0037] And a supply conveyor 12 for supplying the object to be processed P is connected to the charging port 101. As another mode different from the supply conveyor 12, a pump capable of transporting sludge (hereinafter sometimes referred to as a sludge pump) can be applied. Specifically, individual sludge pumps are connected to the charging ports 101a to 101f by piping, and the supply and stop of the object to be processed P can be performed by operating and stopping a predetermined sludge pump. Of course, it is also possible to use one sludge pump and arrange it to be branched and connected to the charging ports 101a to 101f respectively, and to provide an automatic operation valve capable of supplying and blocking the object to be processed P in each piping path. Also, a moisture meter (not shown) for measuring the moisture value of the dried product D discharged from the discharge port 107a is provided.

[0038] Furthermore, in this embodiment, as shown in FIG. 1, a combustion furnace 2 using the dried product D discharged from the horizontal continuous conduction heat transfer dryer 1 as fuel is arranged at the rear stage of the horizontal continuous conduction heat transfer dryer 1. Note that the allowable moisture content of the dried product D fed into the combustion furnace 2 is approximately 20 to 50% W.B.

[0039] The present invention relating to The "horizontal continuous conduction heat transfer dryer" and peripheral equipment are configured as described above as an example. Hereinafter, the operation method of the "horizontal continuous conduction heat transfer dryer" of the present invention will be described together with the operation mode of this device.

[0040] (1) Preparation of the dryer First, prior to the feeding of the object to be processed P, the multi-tube heating tube 11 and the main body shell 10 in the horizontal continuous conduction heat transfer dryer 1 are heated up. After supplying heating steam to the rotary joint 115a and the steam supply port 105, the motor M is started to rotate the multi-tube heating tube 11. The heating steam supplied to the rotary joint 115a heats up the multi-tube heating tube 11 while passing through the heat tube bundle 116, and eventually becomes drain and is discharged to the outside from the rotary joint 115b on the other end side. Also, the heating steam supplied to the steam supply port 105 heats up the main body shell 10, and eventually becomes drain and is discharged to the outside from the drain port 106. Note that a siphon tube (not shown) is provided inside the end plate 112 on the rotary joint 115b side, and a steam trap (not shown) is provided in the flow path of the drain discharged from the rotary joint 115b. Also, a steam trap (not shown) is provided in the flow path of the drain discharged from the drain port 106.

[0041] (2) Drying of the object to be processed Next, the object to be processed P (70 to 80% W.B. as an example) is fed into the feed port 101. This is moved from the feed port 101 side to the overflow port 102 side by the action of the feed blade 118, and is further scraped up by the lifter 117 and comes into contact with the heat tube bundle 116 etc. At this time, drying proceeds by receiving heat. At this time, the feed port 101 has a plurality along the longitudinal direction of the multi-tube heating tube 11 pieceSince they are formed in the [relevant part] (inlets 101a to 101f), the heat transfer surfaces of the multi-tubular heating pipes 11 can be effectively used, and the drying efficiency is enhanced. Since the inside of the platen 112 is filled with heating steam, the surface part of the platen 112 also effectively acts on the drying of the object to be processed P. Also, the object to be processed P located inside the main body shell 10 is also referred to as an intermediate product P1. Then, the object to be processed P (intermediate product P1) after drying usually becomes a dried product D with a moisture content of about 15% W.B. and flows out from the overflow port 102, and is discharged to the outside from the discharge port 107a.

[0042] (3) Adjustment of the moisture content of the intermediate product and adjustment of the moisture content of the dried product In the present invention, instead of operating to keep the moisture of the dried product D constant as in the conventional operation method, an operation is performed that emphasizes keeping the input amount of the object to be processed P into the horizontal continuous conduction heat transfer dryer 1 constant. Therefore, in the present invention, in order to prevent the adhesion of the object to be processed P (intermediate product P1) to the heat transfer tube bundle 116, which is the heat transfer surface of the multi-tubular heating pipe 11 and is a factor that inhibits the feeding of the object to be processed P (intermediate product P1) and the discharge of the dried product D, an operation is performed to keep the average moisture content of the object to be processed P (intermediate product P1) in the main body shell 10 in an over-dried state of 25% W.B. or less at which adhesion is considered to start.

[0043] Specifically, "state description" (details will be described later) is performed based on the product temperature of the object to be processed P (intermediate product P1) measured by the temperature sensors 13a to 13e, and according to the mode corresponding to the obtained "state description", the input amount of the object to be processed P to the preset inlet 101 is increased or decreased, and an operation is performed to increase or decrease the input ratio of the sixth inlet 101f according to this increase or decrease.

[0044] While keeping the moisture content of the object to be processed P (intermediate product P1) at the part where the heat transfer tube bundle 116 is located inside the main body shell 10 in an over-dried state, the object to be processed P is introduced from the inlet 101f formed near the overflow port 102, so that the moisture content of the dried product D discharged from the main body shell 10 can be discharged within the allowable range (for example, 20 to 50% W.B.) of equipment such as the combustion furnace 2 installed in the subsequent stage of the horizontal continuous conduction heat transfer dryer 1 without causing adhesion inside the main body shell 10, and the input amount of the object to be processed P per unit time into the main body shell 10 is kept constant.

[0045] Here, the "state explanation" refers to explaining the "temperature conditions" of the object to be processed P (intermediate product P1) distributed along the longitudinal direction inside the main body shell 10. As basic information, the temperature sensor 13 is divided into three groups: "temperature sensors 13a and 13b", "temperature sensors 13c and 13d", and "temperature sensor 13e", and based on the detection values of the temperature sensors 13 grouped in this way, the "temperature conditions" of the object to be processed P (intermediate product P1) are explained. Here, the "temperature conditions" of the object to be processed P (intermediate product P1) are classified as "high temperature (H)", "reference temperature (N)", and "low temperature (L)". As an example, as shown in the table of FIG. 6, for "temperature sensors 13a and 13b", the case where T≧90°C applies is "high temperature (H)", the case where 83°C < T < 90°C applies is "reference temperature (N)", and the case where T≦83°C applies is "low temperature (L)". And the "temperature conditions" of "temperature sensors 13a and 13b" become the basic information for judging (information processing) each state classified in the "state explanation". Also, for "temperature sensors 13c and 13d", the case where T≧94°C applies is "high temperature (H)", the case where 90°C < T < 94°C applies is "reference temperature (N)", and the case where T≦90°C applies is "low temperature (L)". And the "temperature conditions" of "temperature sensors 13c and 13d" become the basic information for judging (information processing) each state classified in the "state explanation". Furthermore, for the "temperature sensor 13e", when T≥94°C is applicable, it is defined as "high temperature (H)", when 91°C < T < 94°C is applicable, it is defined as "reference temperature (N)", and when T≤91°C is applicable, it is defined as "low temperature (L)". And the "temperature condition" of the "temperature sensor 13e" serves as the basic information for determining (information processing) each state classified in the "state description".

[0046] Also, as shown in FIGS. 7 to 9 when performing the above "state description", for the "temperature sensors 13a and 13b" and the "temperature sensors 13c and 13d", as the "temperature classification" determined based on the above "temperature condition", they are classified into the states of "both H", "one is N and the other is N or more", and "at least one is L". First, the "both H" means that, for example, in the case of the temperature sensors 13a and 13b, both are in the state where the "temperature condition" is "H". Also, the "one is N and the other is N or more" means that, for example, in the case of the temperature sensors 13a and 13b, either one is in the state of "N" and the other is in the state of "N" or "H". Also, the "at least one is L" means that at least either one is in the state of "L". On the other hand, for the "temperature sensor 13e", as the "temperature classification" determined based on the "temperature condition", it is classified into the states of "H", "N", and "L". And they are classified into each state of the "state description" according to the combination of these "temperature classifications".

[0047] And in this embodiment, the above "state description" is, as an example shown in FIGS. 7 to 9, classified as "all 'H' continued", "all 'H'", "two 'H's", "one 'H'", "reference state", "one 'H', one 'L'", "one 'L'", "two 'L's", "all 'L's", "all 'L' continued" according to the state of the determination material of the above "state description". More specifically, for example, when the temperature classifications of the temperature sensors 13a and 13b are "both H", the temperature classifications of the temperature sensors 13c and 13d are "both H", and the temperature sensor 13e is "N or L", the "state description" is classified as "two 'H's".

[0048] And corresponding to each of these "state explanations", modes (for example, S continuous, S, T, U, V, W, X, Y, Z, Z continuous) are set. In the same mode, even if the temperature ranges are different for each pattern No., the total of the objects to be processed P input into the inlets 101a to 101e is set to the same value. For example, in the U mode, the total of the objects to be processed P input into the inlets 101a to 101e is set to 86% of the total input amount. On the other hand, into the inlet 101f, the remaining objects to be processed P (14% of the total input amount) are evenly divided and input in multiple times.

[0049] (3-1) Operation in the V mode (reference state) First, in FIG. 8, pattern No. 11 shows the input amounts (%) of the objects to be processed P into the inlets 101a to 101f in the "V mode" (reference state). In FIGS. 7, 8, and 9, the inlet 101a is denoted as (a), and the inlets 101b to 101f are similarly denoted as (b), (c), (d), (e), and (f). Also, in the "V mode", the input amount of the object to be processed P into the horizontal continuous conduction heat transfer dryer 1 is 2920 kg / h, the density of the object to be processed P is 700 kg / m3, the moisture content of the object to be processed P is 76% W.B., and it is 1800 sec / cycle. Here, 1800 sec / cycle means that in FIG. 8, in pattern No. 11, for example, a series of inputs from the leftmost inlet 101a to the rightmost inlet 101f is one cycle, and the time required for this one cycle is 1800 sec. As will be described in detail below, in this embodiment, the time for one cycle is also set to 1800 sec in modes other than the V mode. Of course, it is also possible to change the setting of the time for one cycle for each mode. And in the "V mode", if explained in one cycle, first, 17% of the object to be processed P is input into the input port 101a, then 3.2% of the object to be processed P is input into the input port 101f, then 16% of the object to be processed P is input into the input port 101d, then 3.2% of the object to be processed P is input into the input port 101f, then 20% of the object to be processed P is input into the input port 101b, then 3.2% of the object to be processed P is input into the input port 101f, then 10% of the object to be processed P is input into the input port 101e, then 3.2% of the object to be processed P is input into the input port 101f, then 21% of the object to be processed P is input into the input port 101c, and finally 3.2% of the object to be processed P is input into the input port 101f (total 100%).

[0050] And by changing the input amount and order of the object to be processed P to the input ports 101a to 101f in this way, although the moisture content of the dried product D discharged from the discharge port 107a is 20 to 50% W.B., this value is within the allowable range of the combustion furnace 2, and it is possible to supply the dried product D to the combustion furnace 2 (for example, 1207 kg / h) without interruption while keeping the input amount of the object to be processed P per unit time to the main body shell 10 constant at 2920 kg / h. That is, in this embodiment, while stably supplying the object to be processed P with a moisture content of 76% W.B. into the main body shell 10 of the horizontal continuous conduction heat transfer dryer 1, the object to be processed P (intermediate product P1) is maintained in an over-dried state where no adhesion occurs to the multi-tube heating pipe 11, and it can be stably supplied to the combustion furnace 2 as the dried product D with a moisture content of 20 to 50% W.B. Note that the input order of the object to be processed P to the input ports 101a to 101f is appropriately changed according to the configuration of the horizontal continuous conduction heat transfer dryer 1 and the properties of the object to be processed P.

[0051] Here, regarding the relationship between the inside of the main body shell 10 and the object to be processed P (intermediate product P1), the range inside the main body shell 10 where the inlets 101a to 101c are provided is a range in which the input amount can be changed relatively dynamically according to the temperatures of the temperature sensors 13a to 13e provided in a form corresponding to these inlets 101a to 101c. The range on the downstream side (the side of the overflow port 102), that is, the range where the inlets 101d and 101e are provided, is particularly preferably a range in which the input amount is fixed at a constant value for the purpose of stabilizing the moisture value. In this embodiment, regardless of the mode, the input to the inlet 101d is fixed at 16% as an example, and the input to the inlet 101e is fixed at 10% as an example.

[0052] Also, what is characteristic here is that, as the range in which the input amount can be changed dynamically as described above, it includes the input from the inlet 101f formed at the rearmost side near the discharge port 107a (substantially near the overflow port 102). Regarding the input from this inlet 101f, it is particularly preferable to always perform the input from the inlet 101f after the input from the inlets 101a to 101e other than the inlet 101f, and to keep the input amount from the inlet 101f always the same within the same mode in order to discharge the dried product D with stable moisture without overly complicating the control. Thereby, the input amount of the object to be processed P into the horizontal continuous conduction heat transfer dryer 1 can be kept constant.

[0053] Taking the operation in the above-described V mode (reference state) as the reference state, in other modes, the input amounts of the object to be processed P to the inlets 101a, 101b, 101c, and 101f are increased or decreased. Of course, the up / down rate is appropriately changed according to the configuration of the horizontal continuous conduction heat transfer dryer 1 and the properties of the object to be processed P. However, in any mode, the total input amount of the object to be processed P is 2 in this embodiment. 9 20 kg / h. Depending on the physical properties of the object to be processed P and the configuration of the horizontal continuous conductive heat transfer dryer 1, for example, in the T mode where the temperature state of the intermediate product P1 in the main body shell 10 is determined to be higher than in the V mode, it is also possible to perform control with a set change to a total input amount increased from the total input amount in the V mode, or it is also possible to make a set change to increase only the input amounts from the inlets 101a, 101b, 101c, and 101f. Conversely, for example, in the X mode where the temperature state is determined to be lower than in the V mode, it is also possible to perform control with a set change to a decreased input amount, and it is also possible to make a set change to decrease only the input amounts from the inlets 101a, 101b, 101c, and 101f.

[0054] (3-2) Operation in the S continuous mode Next, patterns No. 1 and No. 2 shown in Fig. 7 indicate the input amounts (%) of the object to be processed P to the inlets 101a to 101f in the "S continuous mode" and the "S mode". In the "S continuous mode" and the "S mode", 19% of the object to be processed P is input to the inlet 101a, then 2% of the object to be processed P is input to the inlet 101f, then 16% of the object to be processed P is input to the inlet 101d, then 2% of the object to be processed P is input to the inlet 101f, then 22% of the object to be processed P is input to the inlet 101b, then 2% of the object to be processed P is input to the inlet 101f, then 10% of the object to be processed P is input to the inlet 101e, then 2% of the object to be processed P is input to the inlet 101f, then 23% of the object to be processed P is input to the inlet 101c, and finally 2% of the object to be processed P is input to the inlet 101f (total 100%).

[0055] By changing the input amounts and order of the object to be processed P to the inlets 101a to 101f in this way, although the moisture value of the dried product D discharged from the discharge port 107a is 20 to 50% W.B., this value is within the allowable range of the combustion furnace 2, and it becomes possible to supply the dried product D to the combustion furnace 2 without interruption while keeping the input amount of the object to be processed P to the main body shell 10 constant at 2920 kg / h per unit time. That is, also in this embodiment, while stably supplying the object to be processed P with a moisture content of 76% W.B. into the main body shell 10 of the horizontal continuous conduction heat transfer dryer 1, the object to be processed P (intermediate product P1) is maintained in an over-dried state where no adhesion occurs to the multi-tube heating tubes 11, and it can be stably supplied to the combustion furnace 2 as a dried product D with a moisture content of 20 to 50% W.B.

[0056] In the "S continuous mode" and the "S mode", the input amount (%) of the object to be processed P into the inlets 101a to 101f, the driving time of the supply conveyor 12 or the driving time of the supply conveyor 12 and the opening time of the dampers 124b to 124e, and the input order are exactly the same. However, the "S continuous mode" is a mode when all the temperatures of the temperature sensors 13a to 13f are in a high temperature state exceeding the predetermined temperature set for each. The steam flow rate adjusting valve (not shown) is changed to a predetermined low flow rate setting value and controlled so that the input amount into the inlets 101a to 101e and the steam flow rate match the evaporation amount calculated from the moisture of the object to be processed P and the moisture of the dried product D.

[0057] (3-3) Operation in the T mode Also, the patterns No. 3 to No. 7 shown in FIG. 7 indicate the input amount (%) of the object to be processed P into the inlets 101a to 101f in the "T mode".

[0058] And as an example, in the "T mode" of pattern No. 3 where the temperature classification of "temperature sensors 13a and 13b" is "both H", the temperature classification of "temperature sensors 13c and 13d" is "both H", and the temperature classification of "temperature sensor 13e" is "N or L", 19% of the object to be processed P is input into the inlet 101a, then 2.4% of the object to be processed P is input into the inlet 101f, then 16% of the object to be processed P is input into the inlet 101d, then 2.4% of the object to be processed P is input into the inlet 101f, then 22% of the object to be processed P is input into the inlet 101b, then 2.4% of the object to be processed P is input into the inlet 101f, then 10% of the object to be processed P is input into the inlet 101e, then 2.4% of the object to be processed P is input into the inlet 101f, then 21% of the object to be processed P is input into the inlet 101c, and finally 2.4% of the object to be processed P is input into the inlet 101f (total 100%).

[0059] And by changing the input amount and order of the object to be processed P to the inlets 101a to 101f in this way, although the moisture content of the dried product D discharged from the discharge port 107a is 20 to 50% W.B., this value is within the allowable range of the combustion furnace 2, and while keeping the input amount of the object to be processed P to the main body shell 10 constant at 2920 kg / h per unit time, it is possible to supply the dried product D to the combustion furnace 2 without interruption. That is, also in this embodiment, while stably supplying the object to be processed P with a moisture content of 76% W.B. into the main body shell 10 of the horizontal continuous conduction heat transfer dryer 1, the object to be processed P (intermediate product P1) is maintained in an over-dried state where no adhesion occurs to the multi-tube heating pipe 11, and it can be stably supplied to the combustion furnace 2 as the dried product D with a moisture content of 20 to 50% W.B.

[0060] (3-4) Operation in the Z continuous mode Also, the patterns No. 27 and No. 28 shown in Fig. 9 indicate the input amounts (%) of the object to be processed P to the inlets 101a to 101f in the "Z mode" and the "Z continuous mode". And in the "Z mode" and the "Z continuous mode", 15% of the object to be processed P is input to the inlet 101a, then 4.4% of the object to be processed P is input to the inlet 101f, then 16% of the object to be processed P is input to the inlet 101d, then 4.4% of the object to be processed P is input to the inlet 101f, then 18% of the object to be processed P is input to the inlet 101b, then 4.4% of the object to be processed P is input to the inlet 101f, then 10% of the object to be processed P is input to the inlet 101e, then 4.4% of the object to be processed P is input to the inlet 101f, then 19% of the object to be processed P is input to the inlet 101c, and finally 4.4% of the object to be processed P is input to the inlet 101f (total 100%).

[0061] By changing the input amount and order of the object to be processed P into the inlets 101a to 101f in this way, although the moisture content of the dried product D discharged from the outlet 107a is 20 to 50% W.B., this value is within the allowable range of the combustion furnace 2. While keeping the input amount per unit time of the object to be processed P into the main body shell 10 constant at 2920 kg / h, it becomes possible to supply the dried product D to the combustion furnace 2 without interruption. That is, also in this embodiment, while stably supplying the object to be processed P with a moisture content of 76% W.B. into the main body shell 10 of the horizontal continuous conduction heat transfer dryer 1, the object to be processed P (intermediate product P1) is maintained in an over-dried state where no adhesion occurs to the multi-tube heating pipe 11, and it can be stably supplied to the combustion furnace 2 as the dried product D with a moisture content of 20 to 50% W.B.

[0062] Note that in the "Z continuous mode" and the "Z mode", the input amount (%) of the object to be processed P into the inlets 101a to 101f, the driving time of the supply conveyor 12 or the driving time of the supply conveyor 12 and the opening time of the dampers 124b to 124e, and the input order are exactly the same. However, in the "Z continuous mode", it is a mode when all the temperatures of the temperature sensors 13a to 13f are in a low temperature state lower than the predetermined temperature determined for each, and the original pressure of the steam is increased to a predetermined value so that the input amount into the inlets 101a to 101e and the steam flow rate match the evaporation amount calculated from the moisture content of the object to be processed P and the moisture content of the dried product D. It is controlled by such a change.

[0063] 〔Other Embodiments〕 The present invention is based on the configuration example described above structural as the basic embodiment, but it is also possible to make changes as shown below within the scope of the technical idea of the present invention. First, a modified example of the horizontal continuous conduction heat transfer dryer 1 will be described. That is, in the above basic embodiment, the sixth inlet 101f was installed so as to be located above the rear end plate 112 in the multi-tube heating pipe 11. However, as shown in FIG. 4 and also indicated by the virtual line in FIG. 3, the inlet 101f may be installed at a position slightly shifted forward from above the rear end plate 112. Alternatively, as shown in Fig. 4, the carrier gas port 103 may be provided on the rear side of the main body shell 10, and the exhaust port 104 may be provided on the front side of the main body shell 10.

[0064] Also, as a form of the horizontal continuous conduction heat transfer dryer 1, as shown in Fig. 5, as a heat transfer member, a so-called paddle type device having a plurality of paddles 15 along the longitudinal direction of the shaft body 113 can also be adopted. The shaft body 113 and the paddle 15 are hollow bodies, and the steam from the steam supply port 105 is supplied into the paddle 15 through the shaft body 113 to heat the object to be processed P. Also, as another form different from the paddle 15 which is a heat transfer member, a hollow disk communicating with the shaft body 113 can also be applied. Alternatively, as an example of another form of the heat transfer member, a conduction heat transfer dryer that uses a pipe provided in a coil shape around the shaft body 113 and communicating with the shaft body 113 as the heat transfer member can also be applied.

Explanation of Reference Numerals

[0065] 1 Horizontal continuous conduction heat transfer dryer 10 Main body shell 101 Inlet 101a Inlet 101b Inlet 101c Inlet 101d Inlet 101e Inlet 101f Inlet 102 Overflow port 102b Sheet material 103 Carrier gas port 104 Exhaust port 105 Steam supply port 106 Drain port 107 Duct 107a Outlet 108 Rotary valve 109a Probe insertion tube 109b Probe insertion tube 109c Probe insertion tube 109d Probe insertion tube 109e probe insertion tube 109f probe insertion tube 11 multi-tube heating pipe 111 angle 112 mirror plate 113 shaft body 114 bearing block 115 rotary joint 115a rotary joint 115b rotary joint 116 heat tube bundle 117 lifter 118 feed vane 12 supply conveyor 120 trough 121 screw 122a discharge port 122b discharge port 122c discharge port 122d discharge port 122e discharge port 122f discharge port 123a supply pipe 123b supply pipe 123c supply pipe 123d supply pipe 123e supply pipe 123f supply pipe 124b damper 124c damper 124d damper 124e damper 125 inlet 13 temperature sensor 13a temperature sensor 13b temperature sensor 13c temperature sensor 13d temperature sensor 13e temperature sensor 13f temperature sensor 15 paddle 2 combustion furnace D dried product F machine frame P workpiece Intermediate product P1 Motor M

Claims

1. A shaft body equipped with a heat transfer member is disposed within a main body shell, and heating steam is passed through and rotated within the shaft body, In an operating method of a horizontal continuous conduction heat transfer dryer for obtaining a dried product of a material to be processed by bringing the material to be processed introduced into the main body shell into contact with a heat transfer member that rotates together with the shaft body while retaining the material to be processed within the main body shell, An inlet is formed at a plurality of locations in the upper part of the main body shell, and a temperature sensor is installed within the main body shell below these inlets, A temperature range is determined based on the temperature conditions corresponding to the detected values of these temperature sensors, and a state explanation corresponding to this temperature range is provided, According to the obtained state explanation, for each preset mode, an operation is performed in which a preset amount of the material to be processed is introduced into a preset inlet, While keeping the moisture of the material to be processed within the main body shell in an over-dried state, Furthermore, by introducing the material to be processed from an inlet formed near the discharge port, The moisture value of the dried product discharged from the main body shell is changed within the allowable range of the equipment installed downstream of the horizontal continuous conduction heat transfer dryer, An operating method of a horizontal continuous conduction heat transfer dryer, characterized in that the input amount of the material to be processed per unit time into the main body shell is kept constant.

2. When introducing a preset amount of the material to be processed into the preset inlet, the supply time to the desired inlet by a supply conveyor or pump is set by a timer, which is a feature of the operating method of the horizontal continuous conduction heat transfer dryer according to Claim 1.

3. The mode according to the state explanation increases or decreases the input ratio to the inlet that measures the temperature before and after directly below the inlet, According to this increase or decrease, a setting is made to increase or decrease the input amount to the inlet formed near the discharge port, which is a feature of the operating method of the horizontal continuous conduction heat transfer dryer according to Claim 1 or 2.

4. Regarding the supply amount to a specific inlet among the inlets, it is set to the same value in all modes, which is a feature of the operating method of the horizontal continuous conduction heat transfer dryer according to any one of Claims 1 to 3.

5. Regarding the supply amount to the inlet formed near the discharge port, it is set to the same value within each mode, which is a feature of the operating method of the horizontal continuous conduction heat transfer dryer according to any one of Claims 1 to 4.

6. The operation method of the horizontal continuous conduction heat transfer dryer according to any one of claims 1 to 5, wherein the horizontal continuous conduction heat transfer dryer is a device having a heat pipe bundle as a heat transfer member.

7. The operation method of the horizontal continuous conduction heat transfer dryer according to claim 6, wherein the inlet formed near the discharge port is formed above the end plate provided at the end of the heat pipe bundle.

8. The operation method of the horizontal continuous conduction heat transfer dryer according to any one of claims 1 to 5, wherein the horizontal continuous conduction heat transfer dryer is a device having a plurality of paddles along the longitudinal direction of the shaft body as a heat transfer member.

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