How to operate a horizontal continuous conduction heat transfer dryer

Abstract

To provide development of a new operational method for a horizontal continuous conductive heat transfer dryer capable of stabilizing a moisture content of the dried product and reducing fluctuations in the amount of dried product discharged by using fuzzy inference with newly found conditions and conclusions in drying sludge and other materials using a horizontal continuous conductive heat transfer dryer.SOLUTION: In the operation of a horizontal continuous conductive heat transfer dryer 1 in which a multi-tube heating tube 11 is installed in the main shell 10, the multi-tube heating tube 11 is rotated with heating steam flowing through it, the material to be treated H is supplied into the main shell 10 by the sludge pump 2, and the material H is kept in the main shell 10 while contacting the multi-tube heating tube 11 to obtain dried product D of the material to be treated H. In the operation of the horizontal continuous conductive heat transfer dryer, the condition part is one or more of the following: the sludge pump speed, the load current of the multi-tube heating tubes, the deviation of the load current of the multi-tube heating tubes, the moisture of the dried product, and the deviation of the moisture of the dried product. The feature of this method is to perform fuzzy inference with the sludge pump speed as the conclusion part.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a horizontal continuous conduction heat transfer dryer suitable for drying materials in a muddy, cake-like, powdery or granular form, and in particular to an operating method of a horizontal continuous conduction heat transfer dryer capable of satisfactorily drying materials whose properties fluctuate greatly, such as dehydrated sludge from sewage. [Background technology]

[0002] Recently, environmental conservation efforts have become more common, and companies and other organizations are drying and concentrating general waste such as food waste and food processing residues, as well as sewage sludge, in order to reduce their volume and prevent decay, before recycling or disposing of them.

[0003] As one of the devices for drying such sludge, the applicant has developed , Made One example of a horizontal continuous conduction heat transfer dryer 1' (product name: inner tube rotary) that is manufactured and sold by the company is shown in Fig. 13. As shown in Fig. 13, this device has a multi-tube heating pipe 11' in a main body shell 10', and this multi-tube heating pipe 11' is rotated while heating steam is passed through it, and the material to be treated H is brought into contact with this pipe to evaporate moisture (see Patent Document 1, for example). The material H to be treated is supplied into the main shell 10' from the inlet 101', is lifted up by the lifter 117', and moves toward the overflow outlet 102' as the drying progresses. The material D is then discharged to the outside from the overflow outlet 102' via the duct 107'.

[0004] When operating such a horizontal continuous conduction heat transfer dryer 1', the intermediate product H1 (dried treated material H) which occupies about 50% of the capacity of the main shell 10' is retained in the main shell 10' as the seed material, and the moisture content of the newly added treated material H is reduced, thereby enabling efficient drying processing. For this reason, it is necessary to grasp and adjust the amount of intermediate product H1 retained in the main shell 10', but direct measurement by installing a level meter is not realistic due to problems such as dust adhesion. Therefore, by measuring the current value of the motor M', which varies according to the load on the multi-tube heating tube 11', the amount of intermediate product H1 retained in the main shell 10' is obtained based on a calibration curve (retention amount-current value curve) created in advance. The discharge amount of the dried product D is controlled, and the amount of the product D remaining in the main shell 10' is adjusted.

[0005] However, in the horizontal continuous conduction heat transfer dryer 1', when the supply amount of the material H to be treated in the main shell 10' is changed, the load current of the multi-tube heating tube 11', which is an index of the amount of the intermediate product H1 retained, and the moisture content of the dried product D change with a time lag of about several hours. For this reason, the set values ​​are changed based on the experience and judgment of the operator, and when the operator is replaced, the judgment also changes, so that the moisture content of the dried product D does not become constant and the discharge amount of the dried product D also fluctuates greatly, which has not yet been solved.

[0006] The inventors of the present application have been continuing their intensive research and development into the horizontal continuous conduction heat transfer dryer 1', and have embarked on the development of technology that can optimize the amount of intermediate product H1 (dried material H) remaining in the main shell 10' by controlling the horizontal continuous conduction heat transfer dryer 1' using fuzzy control, thereby attempting to solve the above-mentioned problems. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Patent Publication No. 2005-331210 Summary of the Invention [Problem to be solved by the invention]

[0008] The present invention has been made against this background, and has as its technical objective the development of a new operating method for a horizontal continuous conduction heat transfer dryer that uses a newly discovered fuzzy inference having a condition part and a conclusion part to appropriate the amount of material retained in the main shell, stabilize the moisture value of the dried product, and reduce fluctuations in the discharge amount of the dried product when drying material such as sludge using a horizontal continuous conduction heat transfer dryer. [Means for solving the problem]

[0009] That is, the method of operating the horizontal continuous conduction heat transfer dryer according to claim 1 is as follows: In an operation of a horizontal continuous conduction heat transfer dryer, a multi-tubular heating tube is provided inside a main shell, the multi-tubular heating tube is rotated while heating steam is flowed inside the multi-tubular heating tube, a material to be treated is introduced into the main shell by a sludge pump, and the material to be treated is brought into contact with the multi-tubular heating tube while retained in the main shell to obtain a dried product of the material to be treated, Among the sludge pump speed, the multi-tube heating tube load current, the multi-tube heating tube load current deviation, the dry product moisture content, and the dry product moisture content deviation, This system is characterized by performing fuzzy inference with the sludge pump speed, the multi-tube heating tube load current, and the moisture content of the dried product as the condition part, and the sludge pump speed as the conclusion part.

[0010] The method for operating the horizontal continuous conduction heat transfer dryer according to claim 2 is as follows: In an operation of a horizontal continuous conduction heat transfer dryer, a multi-tubular heating tube is provided inside a main shell, the multi-tubular heating tube is rotated while heating steam is flowed inside the multi-tubular heating tube, a material to be treated is introduced into the main shell by a sludge pump, and the material to be treated is brought into contact with the multi-tubular heating tube while retained in the main shell to obtain a dried product of the material to be treated, Among the sludge pump speed, the multi-tube heating tube load current, the multi-tube heating tube load current deviation, the dry product moisture content, and the dry product moisture content deviation, The system is characterized by performing fuzzy inference with the sludge pump speed, the multi-tube heating tube load current, and the multi-tube heating tube load current deviation as condition parts, and the sludge pump speed as conclusion part.

[0011] Furthermore, the method for operating the horizontal continuous conduction heat transfer dryer according to claim 3 comprises the steps of: In an operation of a horizontal continuous conduction heat transfer dryer, a multi-tubular heating tube is provided inside a main shell, the multi-tubular heating tube is rotated while heating steam is flowed inside the multi-tubular heating tube, a material to be treated is introduced into the main shell by a sludge pump, and the material to be treated is brought into contact with the multi-tubular heating tube while retained in the main shell to obtain a dried product of the material to be treated, Among the sludge pump speed, the multi-tube heating tube load current, the multi-tube heating tube load current deviation, the dry product moisture content, and the dry product moisture content deviation, This method is characterized by performing fuzzy inference with the sludge pump speed and the moisture content deviation of the dried product as the condition part and the sludge pump speed as the conclusion part.

[0012] Furthermore, the method for operating the horizontal continuous conduction heat transfer dryer according to claim 4 comprises the steps of: In an operation of a horizontal continuous conduction heat transfer dryer, a multi-tubular heating tube is provided inside a main shell, the multi-tubular heating tube is rotated while heating steam is flowed inside the multi-tubular heating tube, a material to be treated is introduced into the main shell by a sludge pump, and the material to be treated is brought into contact with the multi-tubular heating tube while retained in the main shell to obtain a dried product of the material to be treated, A plurality of parts among the sludge pump speed, the multi-tube heating tube load current, the multi-tube heating tube load current deviation, the dried product moisture content, and the dried product moisture content deviation are set as condition parts; This is an operation method for a horizontal continuous conduction heat transfer dryer that performs fuzzy inference with a sludge pump speed as a conclusion part, and is characterized in that, in accordance with the operating status of the horizontal continuous conduction heat transfer dryer, fuzzy inference is performed using all of the degrees of suitability for the condition part, which are the sludge pump speed, the multi-tube heating tube load current, and the dried product moisture content, the degrees of suitability for the sludge pump speed, the multi-tube heating tube load current, and the multi-tube heating tube load current deviation, and the degrees of suitability for the sludge pump speed and the dried product moisture content deviation. The above problems are solved by the configurations of the inventions described in each of these claims. Effect of the Invention

[0013] First, claim 1 ~3 According to the described invention, the sludge pump speed is The fuzzy inference in the conclusion section is preferable, and the sludge pump speed is is set to a value that allows the amount of the workpiece retained in the main body shell to be appropriate, As a result The moisture content of the dried product is stable and the fluctuation in the discharge amount of the dried product is reduced. Drying process can be done.

[0014] Further, claims 4 According to the described invention, by appropriately selecting the condition part of the fuzzy inference with the sludge pump speed as the conclusion part, the moisture value of the dried product can be made more stable and fluctuations in the discharge amount of the dried product can be further reduced. [Brief description of the drawings]

[0015] [Figure 1] 1 is a skeletal diagram showing a horizontal continuous conduction heat transfer dryer to which the present invention is applied. [Diagram 2] FIG. 2 is a partially cutaway side view of a horizontal continuous conduction heat transfer dryer. [Diagram 3] 1A and 1B are front and rear views showing a horizontal continuous conduction heat transfer dryer with some parts being see-through; [Figure 4] 11 is a table showing rules of fuzzy inference in which the sludge pump speed, the multi-tube heating pipe load current, and the moisture content of the dried product are set as the condition part, and the sludge pump speed is set as the conclusion part. [Diagram 5]11 is a table showing rules of fuzzy inference in which the sludge pump speed, the multi-tube heating tube load current, and the multi-tube heating tube load current deviation are set as the condition part, and the sludge pump speed is set as the conclusion part. [Figure 6] 11 is a table showing fuzzy inference rules in which the sludge pump speed and the dried product moisture deviation are the condition parts, and the sludge pump speed is the conclusion part. [Figure 7] 1 is a graph showing membership functions of multi-tube heating tube load currents. [Figure 8] 10 is a graph showing membership functions of a multi-tube heating tube load current deviation. [Figure 9] 1 is a graph showing membership functions of dry product moisture. [Figure 10] 1 is a graph showing membership functions of moisture deviation of dried products. [Figure 11] 1 is a graph showing a membership function of sludge pump speed. [Figure 12] Graph (a) shows the "amount of material fed into the workpiece," "load current to the multi-tube heating tube," "moisture of the material fed into the workpiece," and "moisture of the dried product" when the horizontal continuous conduction heat transfer dryer is manually operated by an operator, and graph (b) shows the "amount of material fed into the workpiece," "load current to the multi-tube heating tube," "moisture of the material fed into the workpiece," and "moisture of the dried product" when the horizontal continuous conduction heat transfer dryer is automatically operated using the fuzzy control of the present invention. [Figure 13] FIG. 1 is a side view and a cross-sectional view showing a horizontal continuous conduction heat transfer dryer, partly cut away, used in explaining the background art. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] The best mode of the operation method of the horizontal continuous conduction heat transfer dryer of the present invention is as shown in the following embodiment, but this embodiment can be modified as appropriate within the scope of the technical concept of the present invention. EXAMPLES

[0017] Hereinafter, the "method of operating a horizontal continuous conduction heat transfer dryer" of the present invention will be described in detail together with its operating mode after explaining the configuration of the horizontal continuous conduction heat transfer dryer 1. First, the horizontal continuous conduction heat transfer dryer 1 is an apparatus suitable for drying a material H to be treated that is in a muddy, cake-like, powdery or granular state, and is an apparatus for obtaining a dried product D by retaining the material H to be treated while evaporating volatile matters such as moisture contained therein. As shown in Figs. 1 to 3, this dryer is provided with a multi-tubular heating tube 11 in a main body shell 10 provided on a machine frame F, and rotates this multi-tubular heating tube 11 while flowing steam as a heating medium therein, and dries the material H to be treated by bringing it into contact with the multi-tubular heating tube 11 while retaining it in the main body shell 10.

[0018] As shown in FIG. 3, the main body shell 10 is, for example, a hollow member having an oblong cross section, and is formed with an inlet 101, an overflow port 102, a carrier gas port 103, and an exhaust port 104. Here, the feed inlets 101 are formed at a plurality of locations on the upper portion of the main body shell 10, and a first feed inlet 101a is formed near an exhaust port 104 formed at the upper left portion in Fig. 2. A second feed inlet 101b is formed at a portion closer to the center than the exhaust port 104, and a third feed inlet 101c is formed between the second feed inlet 101b and a carrier gas port 103 formed at the upper right portion in Fig. 2. Although the feed inlets 101 are formed at three locations in this embodiment, the feed inlets 101 may be formed at one, two, or four or more locations depending on the specifications of the horizontal continuous conduction heat transfer dryer 1.

[0019] The main body shell 10 and the multi-tube heating tube 11 are installed in the machine frame F in a horizontal state, or inclined so that the exhaust port 104 side is somewhat higher than the carrier gas port 103 side. Furthermore, the main body shell 10 has a double jacket structure, and a steam passage is formed from a steam supply port 105 formed near the inlet 101a to a drain port 106 formed below the overflow port 102, so that the inside of the main body shell 10 can be heated. Note that instead of such a double jacket structure, a tracer pipe or the like can be installed.

[0020] As shown in Figures 2 and 3, the overflow outlet 102 can be formed to the desired height by blocking a square opening formed in the main shell 10 with multiple plates 102b, each about 10 cm wide, from bottom to top. Because of this configuration, if the plate materials 102b are piled up high, the opening of the overflow port 102 opens only narrowly at the top, and a large amount of the objects H to be treated is retained in the main body shell 10. Conversely, if there are fewer plate materials 102b, the opening becomes wider, and the amount of the objects H to be treated that is retained in the main body shell 10 is reduced.

[0021] A duct 107 is fitted to cover the overflow port 102, and a rotary valve 108 is provided in front of an exhaust port 107a formed in the lower part of the duct 107. Of course, a double damper exhaust device or the like may be provided in place of the rotary valve 108.

[0022] The multi-tube heating tube 11 includes end plates 112 on both sides of a heat tube bundle 116 formed by arranging a plurality of tubes in a cylindrical shape, and includes a shaft body 113 at the center of the end plates 112, and the shaft body 113 is rotatably supported by a bearing block 114 provided on the machine frame F. A motor M is provided on the machine frame F as a drive device for rotating the multi-tube heating tube 11. Rotary joints 115 (115a, 115b) are attached to both ends of the shaft 113, and are connected to a heat tube bundle 116. A seal mechanism is provided between the shaft 113 and the main body shell 10 to block the outside air. In addition, the side circumference of the heat tube bundle 116 is provided with a number of angles 111 (12 in this embodiment) to which multiple lifters 117 and feed blades 118 with appropriate angles are attached, and these lift the workpiece H so that it comes into contact with the heat tube bundle 116 and moves from the inlet 101 side to the overflow outlet 102 side.

[0023] Although not shown, a steam generator is provided in addition to the horizontal continuous conduction heat transfer dryer 1, and a suitable device such as a U-shaped device, a straight tube type, a helical coil type, etc. A pipe is connected from this steam generator to the rotary joint 115a and the steam supply port 105 in the horizontal continuous conduction heat transfer dryer 1. A carrier gas is supplied into the main body shell 10 from a carrier gas port 103. The volatile components volatilized from the object to be treated H by the heating of the multi-tube heating tube 11 are carried away by the carrier gas to the outside of the main body shell 10 through an exhaust port 104. Since the carrier gas contains not only the volatile components but also fine powder generated from the object to be treated H, a dust removal device (not shown) may be provided on the path of the carrier gas flow after the exhaust port 104.

[0024] A sludge pump 2 for supplying the material to be treated H is connected to the inlet 101, and the supply speed of this sludge pump 2 can be changed by an inverter motor. Also, a moisture meter 4 is provided for measuring the moisture content of the dried product D discharged from the discharge port 107a.

[0025] The horizontal continuous conduction heat transfer dryer 1 and peripheral equipment for carrying out the present invention are configured as described above as an example, and the operating method of the horizontal continuous conduction heat transfer dryer of the present invention will be described below together with the operating mode of this device.

[0026] (1) Preparing the dryer First, prior to the input of the workpiece H, the multi-tubular heating tube 11 and the main body shell 10 in the horizontal continuous conduction heat transfer dryer 1 are heated, and the motor M is started to rotate the multi-tubular heating tube 11, and heating steam is supplied to the rotary joint 115a and the steam supply port 105. The heating steam supplied to the rotary joint 115a increases the temperature of the multi-tubular 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. The heating steam supplied to the steam supply port 105 increases the temperature of the main body shell 10, and eventually becomes drain and is discharged to the outside from the drain port 106. A siphon pipe (not shown) is provided inside end plate 112 on the rotary joint 115b side, and a steam trap (not shown) is provided in the path through which the drain discharged from rotary joint 115b flows. Also, a steam trap (not shown) is provided in the path through which the drain discharged from drain port 106 flows.

[0027] (2) Drying of the workpiece Next, the material H to be treated is put into the inlet 101, and this material is moved from the inlet 101 side to the overflow outlet 102 side by the action of the feed blade 118, and is further lifted up by the lifter 117 to come into contact with the heat tube bundle 116, etc., at which time, it is heated and dried. At this time, since the inlets 101 are formed at a plurality of places along the longitudinal direction of the multi-tubular heating tube 11, the heat conduction surface of the multi-tubular heating tube 11 can be effectively used, and the drying efficiency is improved. The material to be treated H (intermediate product H1) that has become a dried product D flows out from the overflow outlet 102 and is discharged to the outside from the discharge port 107a.

[0028] (3) Adjustment of retention volume In the present invention, the speed of the sludge pump 2 (hereinafter referred to as "sludge pump speed"), the load current of the multi-tubular heating tube 11 (hereinafter referred to as "multi-tubular heating tube load current"), the load current deviation of the multi-tubular heating tube 11 (hereinafter referred to as "multi-tubular heating tube load current deviation"), the moisture of the dried product D (hereinafter referred to as "dried product moisture"), and the moisture deviation of the dried product D (hereinafter referred to as "dried product moisture deviation") are set as the condition part, By performing fuzzy inference with the "sludge pump speed" as the conclusion, The amount of the workpiece H (intermediate product H1) retained in the main body shell 10 is set to an appropriate amount, The moisture content of the dried product D can be stabilized. Below, an explanation will be given of each embodiment in which the condition part of the fuzzy inference is different.

[0029] (3-1) [An embodiment in which the condition part is "sludge pump speed", "multi-tube heating tube load current", and "dry product moisture content", and the conclusion part is "sludge pump speed"] In this embodiment, the necessity of changing the "sludge pump speed", which is the conclusion, is expressed by an If-Then control rule, with the "sludge pump speed", the "multi-tube heating tube load current", and the "dried product moisture content" as the condition parts. The "sludge pump speed" mentioned above determines the speed at which the sludge pump 2 puts the material H into the main body shell 1, and specifically corresponds to the frequency of the inverter motor of the sludge pump 2. The “multi-tube heating tube load current” corresponds to the load current of the multi-tube heating tube 11, that is, the measurement value of the ammeter 5 connected to the motor M. The “moisture content of the dried product” corresponds to the moisture value of the dried product D detected by the moisture meter 4.

[0030] Specifically, the above fuzzy inference follows the rules shown in Figure 4 as an example. For example, if the "sludge pump speed" is "NL", the "multi-tube heating tube load current" is "NL", and the "dry product moisture content" is "NL", then the "sludge pump speed" is greatly increased ("PL"). Also, if the "Sludge pump speed" is "PL", the "Multi-tube heating tube load current" is "PL", and the "Dry product moisture content" is "ZR", then the "Sludge pump speed" is slightly lowered ("NS"). In the figure, "NL" in the condition section means a large decrease, "ZR" means no change, and "PL" means a large increase. In the figure, "NL" in the conclusion section means a large decrease, "NS" means a small decrease, "ZR" means no change, "PS" means a small increase, and "PL" means a large increase.

[0031] In addition, in FIG. 4, “NL”, “ZR”, and “PL” representing the attributes of “sludge pump speed” are determined by the membership functions shown in FIG. In addition, in FIG. 4, “NL”, “ZR”, and “PL” representing the attributes of the “multi-tube heating tube load current” are determined by the membership functions shown in FIG. In addition, in FIG. 4, “NL”, “ZR”, and “PL” representing the attributes of “dry product moisture content” are determined by the membership functions shown in FIG. The number of linguistic variables (labels) for such attributes and the membership functions for these linguistic variables are determined based on empirical rules, and are appropriately tuned to be optimal for the horizontal continuous conduction heat transfer dryer 1 depending on the type and physical properties of the workpiece H, the scale and configuration of the system, etc.

[0032] The fuzzy control unit built into the control panel 3 performs the above-mentioned fuzzy inference at regular intervals based on the signals sent from the sludge pump 2, ammeter 5, and moisture meter 4, and outputs a signal based on the conclusion to the inverter motor that controls the rotation of the sludge pump 2, changing the discharge speed of the sludge pump 2.

[0033] (3-2) [An embodiment in which the condition part is the sludge pump speed, the multi-tube heating tube load current, and the multi-tube heating tube load current deviation, and the conclusion part is the sludge pump speed] In this embodiment, the necessity of changing the "sludge pump speed", which is the conclusion part, is expressed by an If-Then type control rule, with the "sludge pump speed", the "multi-tube heating tube load current", and the "multi-tube heating tube load current deviation" as the condition parts. The "multi-tube heating tube load current deviation" refers to the deviation between the current value of the "multi-tube heating tube load current" and a past value (for example, 10 minutes ago, 20 minutes ago).

[0034] Specifically, the above fuzzy inference follows the rules shown in Fig. 5 as an example. For example, if the "sludge pump speed" is "NL", the "multi-tube heating tube load current" is "NL", and the "multi-tube heating tube load current deviation" is "NL", then the "sludge pump speed" is greatly increased "PL". Also, if the "sludge pump speed" is "PL", the "multi-tube heating tube load current" is "PL", and the "multi-tube heating tube load current deviation" is "PL", then the "sludge pump speed" is significantly reduced (NL).

[0035] In addition, in FIG. 5, “NL”, “ZR”, and “PL” representing the attributes of the “multi-tube heating tube load current deviation” are determined by the membership functions shown in FIG.

[0036] (3-3) [An example in which the condition part is the sludge pump speed and the moisture deviation of the dried product, and the conclusion part is the sludge pump speed] In this embodiment, the necessity for changing the "sludge pump speed", which is the conclusion, is expressed by an If-Then type control rule, with the "sludge pump speed" and the "dried product moisture deviation" as the condition parts. The "dried product moisture content deviation" refers to the deviation between the current value of the "dried product moisture content" and the past value (for example, 10 minutes ago, 20 minutes ago).

[0037] Specifically, the above fuzzy inference follows the rules shown in Figure 6. For example, if the "sludge pump speed" is "NL" and the "dried product moisture deviation" is "NL", then the "sludge pump speed" is increased slightly (PS). Also, if the "Sludge pump speed" is "PL" and the "Dry product moisture deviation" is "PL", the "Sludge pump speed" is slightly lowered ("NS").

[0038] In addition, in FIG. 6, “NL”, “ZR”, and “PL” which represent the attributes of “dried product moisture deviation” are determined by the membership functions shown in FIG.

[0039] As described above, when drying the material H to be treated such as sludge using the horizontal continuous conduction heat transfer dryer 1, by using the fuzzy inference having a condition part and a conclusion part newly discovered by the present applicant, the amount of the material H to be treated remaining in the main shell 10 can be made appropriate, the moisture value of the dried product D can be stabilized, and fluctuations in the discharge amount of the dried product D can be reduced.

[0040] FIG. 12 shows graph (a) showing the “amount of material fed to the treatment site,” “load current of the multi-tubular heating tube,” “moisture of the material fed to the treatment site,” and “moisture of the dried product” when the horizontal continuous conduction heat transfer dryer 1 is manually operated by an operator, and graph (b) showing the “amount of material fed to the treatment site,” “load current of the multi-tubular heating tube,” “moisture of the material fed to the treatment site,” and “moisture of the dried product” when the horizontal continuous conduction heat transfer dryer 1 is automatically operated using the fuzzy control of the present invention (condition part: “sludge pump speed,” “load current of the multi-tubular heating tube,” “load current deviation of the multi-tubular heating tube,” “moisture of the dried product,” and “moisture deviation of the dried product” conclusion part: “sludge pump speed”). From these graphs, it can be clearly seen that during automatic operation of the horizontal continuous conduction heat transfer dryer 1 using the fuzzy control of the present invention, fluctuations in the "amount of material fed into the dryer" are suppressed, as well as fluctuations in the "moisture content of the dried product." In this fuzzy control, fuzzy inference was performed using all of the following fitness levels for the condition part according to the operating status of the horizontal continuous conduction heat transfer dryer 1: fitness level between "sludge pump speed", "load current of multi-tubular heating tube", and "moisture content of dried product", fitness level between "sludge pump speed", "load current of multi-tubular heating tube", and "load current deviation of multi-tubular heating tube", and fitness level between "sludge pump speed" and "moisture content deviation of dried product". Specifically, the grades and magnitudes of each rule, rule No. 1 to 63, shown in Figures 4, 5, and 6, were calculated (of course, rules that do not apply are irrelevant), and the maximum value for each grade (NL, NS, ZR, PS, PL) was selected from these to calculate the center of gravity. [Explanation of symbols]

[0041] 1. Horizontal continuous conduction heat transfer dryer 10 Body shell 101 Inlet 101a Inlet 101b Inlet 101c Inlet 102 Overflow outlet 102b Board material 103 Carrier gas port 104 Exhaust port 105 Steam supply port 106 Drain port 107 Duct 107a Outlet 108 Rotary Valve 11 Multi-tube heating tube 111 Angle 112 Headboard 113 Axial body 114 Bearing block 115 Rotary joint 115a rotary joint 115b rotary joint 116 Heat tube bundle 117 Lifter 118 Feather 2. Sludge pump 3. Control Panel 4 Moisture meter 5 Ammeter D Dry product F machine frame H Processing object H1 Intermediate product Medium motor

Claims

1. In an operation of a horizontal continuous conduction heat transfer dryer, a multi-tube heating tube is provided inside a main shell, the multi-tube heating tube is rotated while heating steam is passed through the inside of the multi-tube heating tube, a material to be treated is fed into the main shell by a sludge pump, and the material is brought into contact with the multi-tube heating tube while retained in the main shell to obtain a dried product of the material to be treated, A method for operating a horizontal continuous conduction heat transfer type dryer, comprising the steps of: performing fuzzy inference in which the sludge pump speed, the multi-tube heating tube load current, and the moisture content of the dried product are set as condition parts, and the sludge pump speed is set as a conclusion part, among the sludge pump speed, the multi-tube heating tube load current, the multi-tube heating tube load current deviation, the moisture content of the dried product, and the moisture content deviation of the dried product.

2. In an operation of a horizontal continuous conduction heat transfer dryer, a multi-tube heating tube is provided inside a main shell, the multi-tube heating tube is rotated while heating steam is passed through the inside of the multi-tube heating tube, a material to be treated is fed into the main shell by a sludge pump, and the material is brought into contact with the multi-tube heating tube while retained in the main shell to obtain a dried product of the material to be treated, A method for operating a horizontal continuous conduction heat transfer type dryer, comprising the steps of: performing fuzzy inference in which the sludge pump speed, the multi-tubular heating tube load current, and the multi-tubular heating tube load current deviation are used as condition parts, and the sludge pump speed is used as a conclusion part, among the sludge pump speed, the multi-tubular heating tube load current, the multi-tubular heating tube load current deviation, the dried product moisture, and the dried product moisture deviation.

3. In an operation of a horizontal continuous conduction heat transfer dryer, a multi-tube heating tube is provided inside a main shell, the multi-tube heating tube is rotated while heating steam is passed through it, a material to be treated is fed into the main shell by a sludge pump, and the material is retained inside the main shell while coming into contact with the multi-tube heating tube to obtain a dried product of the material to be treated, A method for operating a horizontal continuous conduction heat transfer type dryer, comprising the steps of: performing fuzzy inference in which the sludge pump speed and the moisture content deviation of the dried product are set as condition parts, and the sludge pump speed is set as a conclusion part, among the sludge pump speed, the load current of a multi-tube heating tube, the load current deviation of the multi-tube heating tube, the moisture content of the dried product, and the moisture content deviation of the dried product.

4. In an operation of a horizontal continuous conduction heat transfer dryer, a multi-tube heating tube is provided inside a main shell, the multi-tube heating tube is rotated while heating steam is passed through it, a material to be treated is fed into the main shell by a sludge pump, and the material is brought into contact with the multi-tube heating tube while retained in the main shell to obtain a dried product of the material to be treated, A plurality of parts among the sludge pump speed, the multi-tube heating tube load current, the multi-tube heating tube load current deviation, the dried product moisture content, and the dried product moisture content deviation are set as condition parts; A method for operating a horizontal continuous conduction heat transfer dryer that performs fuzzy inference with a sludge pump speed as a conclusion, According to the operating conditions of the horizontal continuous conduction heat transfer dryer, the suitability of the condition part is the sludge pump speed, the multi-tube heating tube load current, and the moisture content of the dried product; A sludge pump speed, a multi-tube heating tube load current, and a degree of conformity as a multi-tube heating tube load current deviation; The relationship between sludge pump speed and the moisture content deviation of dried products. A method for operating a horizontal continuous conduction heat transfer dryer, characterized by performing fuzzy inference using all degrees of compatibility.

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