JP2005265346A - Drying device using heated steam - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem in a conventional activated carbon manufacturing system composed of a drier provided with a cutter and a screw conveyor in a drying part for drying waste, and having a jacket for heating, a dry distillation furnace for dry distilling the dried waste, and an activated carbon activation furnace for making activated carbon from the dried waste discharged from the dry distillation furnace, that a field of application is limited though the digested sludge is carbonized, and the tertiary treatment is performed on the carbonized activated carbon by installing an activated carbon manufacturing system in a sewage treatment facility. <P>SOLUTION: This drying device is composed of a drying chamber comprising a product discharge port with a jacket, a primary drying part comprising a charging port and a discharging port divisionally formed on the drying chamber, a stirring blade comprising an expandable and/or movable edge tool mounted at a lower part of a drying chamber, and a pipe for supplying the heated steam to the jacket, and uses the heated steam. Thus the drying can be efficiently performed by utilizing the heated steam. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to drying treatment (separation or removal of moisture) of a wet object such as household dust, livestock manure or sludge soil, industrial waste, waste processing liquid (oil or water) containing dust, etc. Etc.), or a drying apparatus using heated steam for the purpose of drying and / or ensuring quality of products (raw materials) for sale.

  Conventionally, as a drying device for the purpose of drying treatment (separation or treatment for removing moisture) of a wet object to be treated (explained with industrial waste or household dust), heating means, separation means, or odor treatment Configurations provided with means are known. For example, the following inventions are known.

  Document (1) is “Activated carbon production apparatus and production method and activated carbon production system” of Japanese Patent Application Laid-Open No. 2002-167209. The outline is that a cutter and a screw conveyor are provided in a drying section for drying waste, and the outside. An activated carbon production system comprising a dryer having a heating jacket, a carbonization furnace for carbonizing the waste dried by the dryer, and an activated carbon activation furnace using activated carbon as the dry waste discharged from the carbonization furnace The activated carbon production system is installed in a sewage treatment facility, the digested sludge is carbonized, and the carbonized activated carbon is used for the tertiary treatment.

  Reference (2) is a “garbage drying volume reduction device” of JP-A-2002-361201, the outline of which is provided on a rotating shaft projecting from a bottomed cylindrical heating chamber, and the rotating shaft, A bucket detachably accommodated in the heating chamber; an agitating blade for agitating the internal dust provided in the bucket; a lid for closing the opening of the heating chamber; a heating means for the heating chamber; The pressure reduction means for pressure reduction has features such as easy discharge of dry waste, simplification of internal cleaning / cleaning, improvement of machine durability, and the like.

JP2002-167209

JP2002-361201

  In Documents (1) and (2), the means for removing moisture from the object to be processed is an apparatus that directly heats the object to be processed using means such as a heating chamber. Therefore, it is considered that the thermal efficiency is inferior. Further, in Document (1), since the heating chamber and the drying chamber are separate structures, the heat source of each chamber (each part) is not effectively used. Therefore, it is considered that there is a problem in terms of effective use of the heat source. Furthermore, since the reference (2) adopts a normal tank form for the heating chamber, it is considered that the amount to be treated is limited, so it is not suitable for use on the factory side.

  The invention of claim 1 is to perform efficient drying using heating steam, and supply heating steam to the drying chamber and / or preheat the primary drying section (preliminary drying chamber) with heating steam. Thus, it is intended to improve the drying efficiency and shorten the drying time by efficiently removing the moisture of the object to be processed.

  Claim 1 is arranged in a drying chamber provided with a product outlet equipped with a jacket, a primary drying section provided with an inlet and an outlet provided in the drying chamber, and a lower portion of the drying chamber. It is a drying apparatus using heating steam composed of the stirring blades provided with the extended and / or movable blades and the piping for supplying heating steam to the jacket.

  The invention of claim 2 achieves the object of claim 1 and processes a large amount of an object using a primary drying section provided with a screw feeder and a drying chamber provided with a stirring blade. This is intended.

  Claim 2 is arranged in a drying chamber provided with a product outlet equipped with a jacket, a primary drying section provided with an inlet and an outlet provided in the drying chamber, and this primary drying section. This is a drying apparatus using heating steam composed of the screw feeder, a stirring blade provided with a blade disposed in the lower part of the drying chamber, and a pipe for supplying heating steam to the jacket.

  The invention of claim 3 achieves the object of claim 1, and controls and / or maintains the temperature of the heating steam filled in the drying chamber to improve drying efficiency and shorten the drying time. Is intended.

  A third aspect of the present invention is a drying apparatus using heating steam in which a heater is provided on the jacket of the first or second aspect.

  The invention of claim 4 achieves the object of claim 1, supplies the heating steam uniformly to the drying chamber, and controls and / or maintains the temperature of the drying chamber, and also performs the primary drying section. It is intended to improve the drying efficiency and shorten the drying time by preheating with heat steam.

  Claim 4 is configured to supply heating steam to the drying chamber of claim 1 or claim 2, and to supply heating steam, and the heating steam is sprayed into the drying chamber from the nozzle of the jacket in an atomized form. It is a drying device using heated steam configured to supply.

  The invention according to claim 1 is arranged in a drying chamber having a product discharge port equipped with a jacket, a primary drying section having an input port and a discharge port provided in the drying chamber, and a lower portion of the drying chamber. It is a drying apparatus using heating steam composed of a stirring blade provided with the extended and / or movable cutter and a pipe for supplying heating steam to the jacket.

  Accordingly, the first aspect of the invention is that heating steam can be used for efficient drying, and heating steam is supplied to the drying chamber and / or the primary drying section (preliminary drying chamber) is preheated with heating steam. By doing so, there is a feature that the moisture of the object to be processed can be efficiently blown to improve the drying efficiency and shorten the drying time.

  The invention of claim 2 includes a drying chamber having a product discharge port equipped with a jacket, a primary drying unit having an input port and a discharge port provided in a drying chamber, and a primary drying unit. This is a drying apparatus using heating steam composed of a screw feeder arranged, a stirring blade provided with a blade disposed in the lower part of the drying chamber, and a pipe for supplying heating steam to the jacket.

  Therefore, Claim 2 can achieve the object of Claim 1 and can use a primary drying section equipped with a screw feeder and a drying chamber equipped with a stirring blade to quickly and / or process a large amount of objects to be processed. Or, there is a feature that it can be reliably processed.

  The invention of claim 3 is a drying apparatus using heating steam in which the jacket of claim 1 or claim 2 is provided with a heater.

  Therefore, Claim 3 can achieve the object of Claim 1 and can improve the efficiency of drying and shorten the drying time by controlling and / or maintaining the temperature of the heating steam filled in the drying chamber. There are features such as being able to plan.

  The invention of claim 4 is configured to supply heating steam to the drying chamber of claim 1 or claim 2, and to supply heating steam, and the heating steam is sprayed into the drying chamber from the nozzle of the jacket in an atomized form. It is a drying device using heated steam configured to supply.

  Accordingly, claim 4 can achieve the object of claim 1, and can supply heated steam uniformly to the drying chamber to control and / or maintain the temperature of the drying chamber. Preheating with heating steam is characterized in that drying efficiency and drying time can be shortened.

  An example of the present invention will be described.

  1 is a heat-insulating drying chamber having a product discharge port 3 and an exhaust port 4, and this drying chamber 1 has a structure that can be divided, and is a lower part composed of a substantially semi-curved curved bottom 100 and side surfaces 101, 101a (both sides). 1a and an upper portion 1b provided with a substantially box-shaped ceiling portion 1c provided on the lower portion 1a. In addition, by covering approximately 1/2 of the lower part 1a of the drying chamber 1 with a jacket 2 having a heat insulating structure, the efficiency of heat exchange by the heating steam is reduced, and the temperature reduction (the temperature is lowered) of the heating steam is reduced. . The drying chamber 1 is attached to the frame A. A preferred example of this attachment will be described. The lower part 1a of the drying chamber 1 is attached to the frame A via the jacket 2 attached to the attachment part A1 of the frame A with the fastener 5 (the lower part 1a from the frame A is attached to the lower part 1a. It can also be removed). The upper part 1b is secured to the lower part 1a with the fastening tool 5, and the upper part 1b is also attached to the frame A (the upper part 1b can be detached from the frame A). If necessary, the ceiling portion 1c of the upper portion 1b can be attached and detached (movable). The jacket 2 covers approximately 1/2 of the lower part 1a of the drying chamber 1, thereby reducing the efficiency of heat exchange by the heating steam and decreasing the temperature of the heating steam. In addition, the entire drying chamber 1 is made into an approximately elliptical shape so as to efficiently flow the steam.

  A number of stirring blades 6 are provided in the lower part 1 a of the drying chamber 1, and the stirring blades 6 are arranged on the rotating shaft 7 provided on the bearing 8 of the frame A with an appropriate interval 70. In a preferred example, adjacent stirring blades 6 are sequentially provided in a substantially opposite direction, and every other stirring blade 6 is sequentially provided in the same direction (see FIG. 2). In this way, the pre-dried workpiece is efficiently dried and smoothed by sequentially providing the stirring blade 6 intermittently at intervals of about 1/3 in the circumferential direction of the rotating shaft 7 and substantially in the opposite direction. It is intended to achieve substantially uniform agitation through proper agitation and to carry it reliably. Although not shown, the stirring blades 6 are sequentially provided in the circumferential direction of the rotating shaft 7 in the substantially opposite direction and / or the same direction, thereby simplifying the apparatus or simply drying the pre-dried workpiece. In addition, it is intended to achieve substantially uniform stirring through strong stirring. The stirring blade 6 has a movable and slender blade 60, and the blade 60 moves in a pair of sleeves 61 (protruded from the sleeve 61 via a spring 63 and / or a restriction described later). It is pivotally attached to a pair of mounting rods 62, and it can be moved with this pivot point as a fulcrum. The blade 60 is moved in the front-rear direction by each spring 63 mounted on each mounting rod 62. In this example, the blade 60 is composed of a pair of sleeves 61, a mounting rod 62, etc., but the blade 60 can also be composed of a single sleeve 61, a mounting rod 62, etc. (not shown), It is not limited. Desirably, several auxiliary blades 6a for conveying and / or cutting are provided between the pair of sleeves 61 and the pair of mounting rods 62 constituting the stirring blade 6. The pre-dried object to be processed is conveyed efficiently and smoothly via the auxiliary blade 6a for conveying and / or cutting, or the pre-dried object is cut, unwound and dried. It is intended to improve efficiency. Although not shown, the blade 60 of the stirring blade 6 may be provided on the mounting rod 62 in a fixed manner. In this fixing method, reliable and / or strong peeling, simplification of the structure, cost reduction, and the like can be achieved.

  By adopting a configuration in which the blade 60 is provided with the stirring blade 6 via the pair of sleeves 61 and the pair of mounting rods 62 as in this configuration, the blade 60 is attached to the side surface 101a facing the side surface 101 of the drying chamber 1. On the other hand, when rotating in the direction of arrow A in the drawing, it moves to the open side by the repulsive force of the spring 63 (movable in the configuration in which the blade 60 is pivotally attached to the mounting rod 62). Conversely, when rotating in the direction of the arrow B in the drawing from the side surface 101a of the drying chamber 1 to the opposite side surface 101, the blade 60 is pressed by the inner surface of the curved bottom 100 of the drying chamber 1, and the spring 63 Is compressed and moves (retreats) to the inside of the sleeve 61. During this retraction, the cutting edge of the blade 60 is brought into sliding contact with the curved bottom 100 using the repulsive force of the spring 63. Through this sliding contact of the blade 60 with the curved bottom portion 100, the dried workpiece stuck to the curved bottom portion 100 is peeled off, and heat exchange with the heating steam in the jacket 2 is promoted. Thereafter, the blade 60 moves sequentially toward the open side from the curved bottom portion 100 to the side surface 101. The stirring blade 6 and the blade 60 are flat when viewed from the side as shown in FIG. 2, and are provided on the rotary shaft 7 with an appropriate interval 70 as described above. This configuration is intended to increase the efficiency of stirring, simplify the equipment, reduce costs, and the like. The rotating shaft 7 provided with the stirring blade 6 is configured to rotate via a drive source 30, and in this example, the drive is transmitted from the drive source 30 by belt hooking means.

  Reference numeral 10 denotes a primary drying unit (preheating heating device) provided in a bowl-shaped receiving portion 1d formed at the corner of the upper portion 1b of the drying chamber 1, and the primary drying unit includes an inlet 11 and an outlet 12 Is provided. A plurality of lids 10b are provided on the ceiling portion 10a of the primary drying unit 10, and opening and closing of the lid 10b is useful for cleaning and visually confirming clogging inside the primary drying unit 10. The primary drying unit 10 is provided with a screw feeder 13 that conveys an object to be processed. The screw feeder 13 is provided on the rotary shaft 14 and rotates via a drive source 30 that drives the rotary shaft 14. In this example, the rotating shaft 14 is driven from the driving source 30 by the belt hooking means. In this example, the rotating shaft 14 is provided in the high-temperature zone of the heating steam in the drying chamber 1, and preheats and drys the processing object (not shown) containing moisture and supplies it to the drying chamber 1. Intended to be. Then, with respect to the rotation of the screw feeder 13, the blade 60 is set at a low speed to achieve reliable and efficient drying or uniform drying. In some cases, the primary drying unit 10 may adopt a batch system in order to reduce the size, simplify the equipment, and the like. The blade 60 is configured to be provided on one side, but may have both sides if necessary. The rotating shaft 14 is rotatably mounted on the frame A. In addition, by providing the primary drying unit 10 in the receiving unit 1d, it is possible to avoid dripping of steam into the drying chamber 1, avoid wetness of the dried workpiece, and achieve efficient drying. Intended. In the figure, 10c (denoted by reference numeral 10b-1) is a knob for the lid 10b.

  In the figure, reference numeral 20 denotes a pair of heating steam means (an example), and the heating steam of the heating steam means 20 is supplied to the entire jacket 2 and / or the drying chamber 1 via a plurality of pipes 21 (an example). Supply almost uniformly. Reference numeral 22 denotes a preheating and / or heating heater disposed on the jacket 2. The jacket 2 is provided with a plurality of vapor injection nozzles 200, and the vapor supplied to the jacket 2 is uniformly injected from the vapor injection nozzle 200 into the drying chamber 1.

  Hereinafter, the main part of the operation of the present invention will be described.

  An object to be treated that has been input to the primary drying unit 10 through the input port 11 on one side (in the example shown in the drawing, on the left side, the same applies hereinafter) is connected to the screw feeder 13 of the primary drying unit 10. To the outlet 12 while being sequentially conveyed and agitated. In this process, the wet processed object is preheated (heated and dried) and / or heat exchange (heated, etc.) using the heating steam of the primary drying unit 10 and / or the heat of the drying chamber 1. ). In this example, while being moved over a long distance, it is sequentially stirred and dried over time, etc., and it is possible to efficiently dry and heat the heat source required for drying by solving the moistened object to be entangled. There are features such as saving energy, and achieving an appropriate temperature quickly. Then, using this appropriate temperature atmosphere, this wet processing object is converted into a dry processing object, and dried through the other side discharge port 12 (right side in the example shown in the drawing, the same applies hereinafter). Supply to the other side of chamber 1. And by reaching from the one side of the primary drying unit 10 to the other side, it is possible to secure a drying time and to achieve an appropriate and dry process that does not deteriorate the quality. Manufactures workpieces. In the case of the batch type, the screw feeder 13 is omitted, which is useful for reducing the apparatus cost and running cost, simplifying / miniaturizing, or saving space.

  When the dried object to be processed supplied to the other side of the drying chamber 1 is brought into contact with a large amount of heated steam at the stage when it is put into the drying chamber 1, the dried object to be processed becomes wet and has an adverse effect. Therefore, desirably, a steam pool chamber 102 (referring to a space between the stirring blade 6 and the primary drying section 10) is formed in the upper part 1b of the drying chamber 1, and the (excess) steam in the steam chamber 102 is passed through. Excess steam in the drying chamber 1 is exhausted through the exhaust port 4. The so-called forced exhaust is intended (an example). It is to be noted that the use of the steam storage chamber 102 is effective for improving the efficiency of drying, shortening the time, or reducing the processing cost. Further, the blade 60 of the stirring blade 6 provided in the drying chamber 1 is configured to be able to protrude and retract using the action of the spring 63, so that the blade 60 is in sliding contact with the curved bottom 100, and the curved bottom 100 Removes (scraps or peels off) dried workpieces that adhere to the surface (burns or sticks), enables efficient transfer of heat source from jacket 2, shortens drying time, maintains moderateness, and Achieving drying without quality deterioration or avoiding burning of the dried workpiece, ensuring the durability of the drying chamber 1, ensuring the quality of the workpiece, or simplifying the cleaning of the drying chamber 1. The frequency of cleaning can be reduced. Further, it is intended to open the side face 101 to eliminate the fatigue of the blade 60, to improve durability, to surely come into sliding contact with the curved bottom portion 100, and to peel off the dried processed object to be attached. The substantially completely dried object that has reached one side of the drying chamber 1 is discharged to the outside through the product discharge port 3. That is, the stirring blade 6 of the present invention is configured to peel the substantially dried workpiece attached to the curved bottom portion 100 and / or the suspended side surface 101 of the drying chamber 1, and to stir and transport the dried workpiece. Is intended. And, since the interval 70 is formed between the respective stirring blades 6, the dried object to be processed is not entangled, and the entanglement is eliminated through appropriate agitation and the drying time is ensured. Is intended.

  The jacket 2, the upper and lower portions 1b, 1a of the drying chamber 1, or the frame A if necessary, can be disassembled to facilitate maintenance management / inspection, simplify removal at the time of inspection, speed up, etc. It is intended to reduce costs, maintain maintenance / inspection, or repair without requiring experience. Further, the heating steam of the jacket 2 is supplied substantially uniformly to the drying chamber 1 and / or the primary drying unit 10 via the pipe 21. The heating steam is supplied intermittently, but may be continuous if necessary.

  Further, by providing the jacket 2 with a preheating and / or heating heater 22, it is possible to manage the temperature of the drying chamber 1 at the start and / or at the start and to quickly respond to the appropriate temperature.

  In the figure, reference numeral 40 denotes a heat source of the preheating and / or heating heater 22.

  In the figure, 31 indicates a blower.

Plane schematic diagram showing an example of the present invention Side surface schematic diagram showing an example of the present invention An overhead view showing a preferred example of the stirring blade of the present invention Side surface schematic diagram showing an example of the relationship between the stirring blade of the present invention and the lower part of the drying chamber (curved bottom) Side surface schematic diagram showing an example of the relationship between the stirring blade of the present invention and the lower part (side surface) of the drying chamber

Explanation of symbols

1 Drying room
1a Bottom
1b top
1c Ceiling
1d receiving part
100 Curved bottom
101 side
101a side
102 Steam chamber
2 jacket
200 Nozzle for steam injection
3 Product outlet
4 Exhaust port
5 Fastener
6 Stir blade
6a Auxiliary blades for transport and / or cutting
60 Cutlery
61 sleeve
62 Mounting rod
63 Spring
7 Rotating axis
70 interval
8 bearings
10 Primary drying section
10a Ceiling
10b lid
10b-1 Pick
11 slot
12 outlet
13 Screw feeder
14 Rotation axis
20 Heating steam means
21 Piping
22 Preheater and / or heater
30 Drive source
31 Blower
40 heat source
A frame
A1 Mounting part

Claims (4)

  A drying chamber equipped with a jacket and equipped with a product outlet, a primary drying section provided with an inlet and an outlet provided in the drying chamber, and expansion and contraction arranged at the lower part of the drying chamber A drying apparatus using heating steam composed of a stirring blade provided with a movable blade and piping for supplying heating steam to the jacket.   A drying chamber equipped with a jacket and equipped with a product outlet, a primary drying section provided with an inlet and outlet provided in the drying chamber, and a screw feeder disposed in the primary drying section; A drying apparatus using heating steam composed of a stirring blade provided with a blade disposed in the lower part of the drying chamber and a pipe for supplying heating steam to the jacket.   3. A drying device using heating steam, wherein the jacket according to claim 1 or 2 is provided with a heater.   3. A drying apparatus using heating steam configured to supply heating steam to the drying chamber of claim 1 or claim 2, and configured to spray and supply the heating steam to the drying chamber from a nozzle of a jacket.

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