JP2007003026A - Groove type hot forming drier - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new groove type hot forming drier capable of preventing dripping of moisture flowing out from a processed object from a roller by engagement action of grooves formed on the roller. <P>SOLUTION: This groove type hot forming drier D is provided with the pair of rollers 1 having the grooves 10 on their side peripheral surfaces and mounted in a state of being kept into contact with each other, the processed object H1 is supplied between the rollers from a hopper 2, to be bitten in the grooves and dried by the heat from the rollers 1, and the dried object H2 is scraped off from the grooves 10 by scrapers 3. Nozzles 5 are mounted at a lower portion of both ends of each of rollers 1, the air A is jetted upward in a state of slightly inclined to a central side with respect to the end portions of the rollers 1, and the moisture flowing out from the processed object H1 by biting action of the grooves 10 and staying at the end portions of the rollers is entirely dispersed to the central side of the rollers 1 by jetting the air A, and thus the moisture is evaporated and water-dripping phenomenon from the rollers 1 can be prevented. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  In the present invention, two rollers having a plurality of grooves formed on the side peripheral surface are arranged in contact with each other, and the object to be processed is sandwiched between the grooves, and then the object to be processed by conduction heat from the inside of the roller. The present invention relates to a new groove-type thermoforming dryer that prevents water from falling from the roller even if moisture flows out of the workpiece due to the biting action of the groove. It is.

  For example, there is a band-type aeration drying apparatus as one of apparatuses for drying an object to be processed such as sludge to form a granular or solid substance. This apparatus is an apparatus for placing a workpiece on a net conveyor and drying the workpiece by forcibly passing hot air from above or below into the gap of the workpiece layer. In this band-type aeration drying apparatus, the contact surface between the object to be processed and hot air becomes the heat receiving surface, so that the larger the surface area of the object to be processed, the larger the effective heat transfer area and the higher the drying efficiency. Is. For this reason, when drying sludge or the like as an object to be treated, this is first preformed (preliminarily dried) into a stick shape of about 4 to 5 mm to increase the surface area, and then a band-type aeration drying apparatus. Many methods are used for drying.

As a dryer for performing such pre-molding, for example, a groove-type thermoforming dryer D ′ as shown in FIG. 7 is known. The basic structure of this dryer is a groove 10 ′ on the side peripheral surface. A pair of rollers 1 'formed with the above are disposed in contact with each other, and a workpiece H1 is supplied to the roller 1' (contact portion) from a hopper 2 'disposed above the rollers 1'. In addition to being engaged in the groove 10 ′, it is dried by conduction heat from the inside of the roller 1 ′. Thereafter, the dried workpiece H1 (dried product H2) is scraped out of the groove 10 'by the scraper 3' to form a stick-like dried product H2.
The present applicant has attempted to develop a groove shape, for example, in this groove-type thermoforming dryer D ′ and has filed a patent application (see, for example, Patent Document 1), and has obtained a corresponding effect. That is, the volume of the workpiece H1 gradually decreases as the drying progresses, but it is preferable that the workpiece H1 does not fall out of the groove 10 'until the scraper 3' is attached. A special technical device is applied to the shape of 10 'to effectively prevent the workpiece H1 from falling off.

However, this groove-type thermoforming dryer D ′ still has room for improvement in the following points. That is, as described above, the groove-type thermoforming dryer D ′ is often used as a pre-drying of the band-type air-drying apparatus. B. In many cases, a relatively high-moisture workpiece H1 such as the above is processed, and the roller 1 'constantly rotates during the processing, so that it is inevitably difficult to seal the roller 1' and the hopper 2 '. It has become. For this reason, the workpiece W1 supplied between the pair of rollers 1 'may cause the contained water W to flow out due to the biting action of the groove 10'. It travels along the axial direction of 1 'and goes to the part where the groove at the end of the roller is not formed. From there, it may drop as a drop, leaving room for improvement in this respect. It was.
In particular, when the container 4 ′ is installed below the roller 1 ′ and the dried product H2 scraped out by the scraper 3 ′ is accommodated in the container 4 ′, the moisture W dripping from the end of the roller is The processed dry product H2 in the container 4 'may be locally wetted, which is a problem.
Japanese Patent Application No. 2004-218506

  The present invention has been made in view of such a background.For example, when drying an object to be processed having a high moisture content, even if moisture flows out of the object to be processed due to the biting action of the groove, This is an attempt to develop a novel groove-type thermoforming dryer that prevents water from dripping down from the roller end.

  That is, the groove-type thermoforming dryer according to claim 1 is configured such that a pair of rollers each having a groove formed on a side peripheral portion thereof are arranged in contact with each other, and a groove of the roller is provided from a hopper provided above these rollers. In the apparatus for supplying a processed object so that it is hard to get inside, drying the processed object by conduction heat from a roller, and then scraping the processed object after drying from the groove by a scraper to obtain a dried product, A nozzle is provided below both ends of each of the rollers, and air is jetted upward from here to prevent moisture flowing out from the object to be processed by the groove biting action from dropping from the rollers. It consists of.

  Further, in the groove type thermoforming dryer according to claim 2, in addition to the requirement of claim 1, the air ejected from the nozzle is jetted upward slightly inclined toward the center with respect to the end of the roller. As a result, moisture that tends to stay at the end of the roller is generally dispersed and evaporated on the central side of the roller.

  In addition to the requirements described in claim 1 or 2, the groove-type thermoforming dryer according to claim 3 is provided with a container for storing a dried product below the roller, and is scraped off by a scraper. The goods are characterized by being housed in this container.

  According to a fourth aspect of the present invention, in addition to the requirements of the first, second, or third aspect, the nozzle is provided between the contact portion of the roller that bites the workpiece and the lowest end position of the roller. A plurality of injection ports are provided in the range.

The above-described problems can be solved by using the configuration of the invention described in each of the claims.
That is, according to the first aspect of the present invention, since the nozzle is provided below the end of the roller, even if moisture flows out from the object to be processed by the biting action of the groove, air is jetted upward from here. It can be dispersed on a roller and evaporated. Therefore, moisture does not fall from the end of the roller, and an effective dry form can be taken particularly in the case of an object to be processed having a high moisture content.

  According to the second aspect of the present invention, since the water that is to be accumulated at the roller end is dispersed and evaporated so as to return to the roller center side, the water that has flowed out of the object to be processed can be more effectively evaporated. And a dried product having a uniform moisture content can be obtained.

  According to the third aspect of the present invention, the dripping phenomenon into the container is prevented by the air ejection from the nozzle. Therefore, the dried product is not wetted again.

  According to the invention of claim 4, since a plurality of air injection ports are provided, the dripping phenomenon can be prevented more reliably. For this reason, the water flowing out from the object to be processed can be more effectively dispersed and evaporated.

  The best mode of the present invention is as described in the following examples.

  The groove-type thermoforming dryer D of the present invention is provided as a pretreatment machine of, for example, a band-type aeration drying apparatus, and mainly bears a granulating action (drying action) for expanding the surface area of the workpiece H1. As an example, as shown in FIGS. 1 and 2, a pair of rollers 1 that rotate so as to bite the workpiece H <b> 1, and a hopper that is responsible for temporary storage of the workpiece H <b> 1 and supply between the pair of rollers 1. 2 and a scraper 3 that scrapes the processed material H1 (dried product H2) that has been dried along with the rotation of the roller 1 from the roller 1 as main members, and these are provided for a frame F as a machine frame. Become. In addition, the shape processed as the dried product H2 is made into a stick shape (square bar shape) of about 4 to 5 mm as an example, and this is accommodated in, for example, the container 4 placed under the roller 1.

In the present invention, nozzles 5 are provided below both ends of the roller 1 (four locations), and air A is ejected upward, whereby the moisture W flowing out of the workpiece H1 due to the biting action of the roller 1 is generated. This prevents the phenomenon of falling from the roller 1 (hereinafter referred to as “sagging phenomenon”). In addition, sludge etc. are mentioned as to-be-processed object H1 made into drying object in this invention, Therefore "Moisture", "water dripping phenomenon", etc. which are described in this specification are actually various impurities (composition). A drain containing a product).
Hereinafter, after describing each component such as the roller 1, the hopper 2, and the scraper 3 constituting the groove-type thermoforming dryer D, the nozzle 5 that prevents the dripping phenomenon will be described.

  First, the pair of rollers 1 will be described. The roller 1 is formed by forming a large number of circumferential grooves 10, for example, square grooves, on the side periphery, and the grooves 10 are formed on the outer surface (side surface) of the roller 1 as shown in FIG. 4B as an example. The bottom surface 10a and the side wall surface 10b are formed in an engraved shape with respect to 1a), and the shape of the groove 10 is a dovetail shape in which the side wall surface 10b becomes wider toward the bottom surface 10a. It is preferably formed in a cross section. This is to prevent the reduced volume H1 from being removed from the groove 10 before being scraped off by the scraper 3 as the roller 1 rotates and drying proceeds. In other words, by forming the groove 10 in a dovetail shape, the workpiece H1 stays (holds) in the groove 10 of the roller 1 for a predetermined time, so that a dry product H2 having a desired moisture content can be obtained reliably. is there.

In addition, in the contact part which a pair of roller 1 contacts, as shown in the said FIG.4 (b), the opening surface of the groove | channel 10 in one roller 1 is closed by the side peripheral surface 1a of the other roller 1. FIG. is there. As the rollers 1 rotate in contact with each other in this manner, the grooves 10 are closed by the other side peripheral surface 1a, so that the workpiece H1 supplied from above is firmly in the grooves 10. This state becomes a state in which the object to be processed H1 is bitten by the groove 10 or a state in which the object to be processed H1 is press-fitted into the groove 10.
In addition, since the roller 1 rotates in such a contact state, even if the workpiece H1 is simply dropped and supplied from the hopper 2 to the roller 1, the workpiece H1 is not easily pressed into the groove 10 (biting). (Refer to FIG. 1B and FIG. 4A).

Further, as shown in FIG. 3 as an example, each roller 1 itself has a hollow cylindrical shape, and a power transmission portion 11 without grooves 10 is formed at both ends. 11 is arranged in close contact, and rotation is transmitted from one roller 1 to the other roller 1. As a result, the pair of rollers 1 rotate in the opposite directions at the same speed. In order to distinguish the pair of rollers 1 from each other, the driving roller is denoted by 1A and the driven roller is denoted by 1B.
Further, as shown in FIG. 3, both ends of the roller 1 are fitted with disc-shaped side plates 12 having an opening at the center, and the openings of the side plates 12 form the rotation axis of the roller 1. A flange 13 having a shaft portion 13a is attached. The shaft portion 13a is rotatably held by a bearing 14 attached to the frame F (see FIG. 1A). In addition, since the axial center part is formed in the tubular shape and the shaft part 13a also has the effect | action which lets a vapor | steam pass through the inside of the roller 1, this part is made into the vapor | steam distribution pipe | tube 13b especially.

Further, the groove type thermoforming dryer D of the present invention incorporates a drive mechanism 15 responsible for the rotation of the roller 1 and a heating mechanism 16 for heating the roller 1 from the inside in order to dry the workpiece H1. These mechanisms will be described below.
First, the drive mechanism 15 decelerates the rotation generated by the motor M as appropriate and transmits it to the roller 1 (drive roller 1A). In this embodiment, as shown in FIG. 1A and FIG. A chain 18 is wound between M and the speed reducer 17, and between the speed reducer 17 and the driving roller 1A, and the rotation of the motor M is transmitted to the driving roller 1A. Reference numerals 15a, 15b, and 15c in the figure are sprockets for the motor M, the speed reducer 17, and the roller 1 (drive roller 1A) on which the chain 18 is actually wound.

  The heating mechanism 16 is a mechanism for heating the roller 1 from the inside in order to dry the workpiece H1 that has entered the groove 10 of the roller 1 to a desired moisture content. Hose HS for transporting the gas, the above-described steam flow pipe 13b, the rotary joint 19 connected so as to allow rotation of the shaft portion 13a, and the like (see FIG. 1A). The steam is heated by the heating mechanism 16 from the hose HS to the rotary joint 19 and the steam flow pipe 13b to reach the inside of the roller 1 and is heated from the inside, and then the steam flow pipe 13b, the rotary joint 19 and the hose on the opposite side. Collected through HS.

  Next, the hopper 2 will be described. In this device, the object to be processed H1 is temporarily stored, and the object to be processed H1 is dropped and supplied between the pair of rollers, that is, the contact portion of the roller 1. As an example, as shown in FIGS. 1B and 4A, the discharge port of the hopper 2 has an opening from a position directly above the driving roller 1A to a position directly above the driven roller 1B, and has a relatively large area. The processing object H1 can be dropped and supplied to the roller 1 from above. In addition, it is preferable to provide a stirring body for stirring the workpiece H1 and preventing bridging in the hopper 2, particularly in the vicinity of the discharge port, so that the dropping of the workpiece H1 can be performed without interruption. Incidentally, the bridge is a phenomenon in which the workpiece H1 forms a partial lump in the hopper 2 and the supply of dropping temporarily stops.

Next, the scraper 3 will be described. For example, as shown in FIG. 4A, the scraper 3 rotates the processed object H1 (dried product H2) after the drying process in the vicinity of the outside where the roller 1 is reversed, that is, the roller 1 is rotated approximately 180 degrees from the contact portion. It scrapes out in position. In this embodiment, the scraper 3 is inserted in a loosely fitted state with a sleeve 33 having a base plate 31 and an urging plate 32 fixed at an appropriate angle with respect to a base shaft 30 fixed to the frame F. It is made up of. The substrate 31 is formed with a plurality of comb-like claws 34 on the working tip side, and these claws 34 are positioned in the groove 10 so as to scrape the dried product H2.
Further, a link 35 and a bolt 36 are sequentially connected to the lower side of the urging plate 32. The bolt 36 is screwed into a nut 37 fixed to the frame F, and an operation handle 38 is provided at the tip. That is, by appropriately rotating the handle 38, the working length of the bolt 36 (the length from the nut 37 to the link 35) is adjusted, and thereby the urging plate 32 is appropriately rotated, so that the claw with respect to the groove 10 is adjusted. The engagement state of 34, in other words, the height of the claw 34 in the groove 10 can be adjusted.
A spring 39 suspended from the frame F is engaged with the upper surface of the urging plate 32 to reduce the load due to the weight of the urging plate 32 and the like.

  Next, the nozzle 5 will be described. As an example, as shown in FIGS. 5 and 6, the nozzle 5 is provided below both ends of the roller 1, and ejects upward air A to the roller 1. As a result, the water W flowing out of the workpiece H1 due to the biting action of the groove 10 is transmitted through the roller 1 to prevent the water sag phenomenon from dropping as a drop from the power transmission unit 11 at the end of the roller. In addition, the code | symbol 50 in a figure is an injection opening of the air A. FIG. In addition, the above-described sag phenomenon is particularly noticeable when the object to be processed H1 having a high water content is handled. It flows out so that the moisture W which has been squeezed out.

In addition, when injecting air A from the nozzle 5, it is preferable to inject air A in a slightly inclined upward direction toward the center of the roller 1, as shown in FIG. This is to disperse the water W that is about to fall from the roller end, that is, the power transmission unit 11, not only to rise in the power transmission unit 11, but also to return to the side peripheral surface 1a on the roller center side as a whole, This is for more efficient evaporation (see FIG. 6).
The air A blown out from the nozzle 5 is normally room temperature air (compressed air), but may be a gas that is appropriately heated. In this case, effective evaporation can be expected in a shorter time.

  When water W drops from the power transmission unit 11 at the end of the roller, for example, as shown in FIG. 7B, the roller 1 does not drop from the lowest position (lowermost end) of the roller 1. Pulled by rotation, it falls from a position slightly past the lower end. For this reason, the nozzle 5 is preferably provided with a plurality of air A injection ports 50 between the contact portion of the roller 1 and the lowest end position of the roller 1. Incidentally, in FIG. 1 (c) and FIG. 5 (a), the state in which the injection ports 50 are provided at two locations near the contact portion and at the lowest end position with respect to one end of the roller 1 is shown. As shown by the two-dot chain line in (b), the injection port 50 is further provided between the vicinity of the contact portion and the lowermost position, and the injection ports 50 are provided at a total of three locations (on one side of the one roller 1). It doesn't matter.

The grooved thermoforming dryer D of the present invention has the basic structure described above. Hereinafter, the drying mode of the workpiece H1 to which this dryer is applied will be described, and the dripping phenomenon will be prevented. An aspect is demonstrated.
(1) Preparation Setting of Dryer This preparation setting is performed before a substantial drying operation, that is, before the workpiece H1 is put into the hopper 2 and the workpiece H1 is dropped and fed between the rollers 1. For example, the motor M is activated to rotate the roller 1 and steam (as an example, 0.5 MPa (about 160 ° C.)) is introduced into the roller 1 to raise the temperature of the roller 1 to an appropriate temperature. . In this preparation setting, the handle 38 is appropriately rotated to set the engagement state of the claw 34 with respect to the groove 10.

(2) Drying of processing object After such setting work is completed, the processing object H1 is put into the hopper 2 and the processing object H1 is dropped and supplied between the rollers 1. In addition, although the to-be-processed object H1 supplied to the roller 1 from the hopper 2 is initially dropped between the upper part of a pair of roller 1, it is gradually pushed into the groove | channel 10 until it reaches a contact part, and a contact part , The groove 10 is almost completely closed, so that the groove 10 is in a state of being bitten here.
Thereafter, the workpiece H1 that has entered the groove 10 is dried by heating from the inside of the roller 1 as the roller 1 rotates, and gradually decreases in volume. At this time, in this embodiment, since the groove 10 is formed in a dovetail shape, the reduced volume H1 is caught on the side wall surface 10b and does not fall out of the groove 10 in the middle, so that the scraper 3 Reach the installation position. For this reason, sufficient drying time is ensured as to-be-processed object H1, and it dries to a desired moisture content.

(3) Prevention of water sag phenomenon In addition, the object to be processed H1 which is hard to enter the groove 10 at the contact portion is squeezed out of the contained water W by the biting action by the groove 10, and the water W flows out. To do. The moisture W travels in the longitudinal direction on the side peripheral surface 1a of the roller 1 and moves to the roller end (power transmission unit 11), where it gradually becomes a large droplet and tries to drip off. However, in the present invention, the nozzle 5 is provided in the vicinity of the end of the roller 1 and the air A is jetted upward from the roller 1 toward the center side of the roller 1. Returned to the center side, the entire surface expands to the side peripheral surface 1a where the groove 10 is not formed, and is evaporated here. For this reason, in the present invention, the dripping phenomenon from the roller end is prevented. For example, even if the container 4 is placed below the roller 1 and the dried product H2 is accommodated therein, It is possible to prevent moisture W from dripping into the container 4. Of course, in this embodiment, since the water W that is about to accumulate in the vicinity of the power transmission portion 11 at the roller end is returned to the roller center side and evaporated in a dispersed state, efficient evaporation can be achieved in a short time.

(4) Removal of dried product The workpiece H1 that has reached the installation position of the scraper 3 is scraped out from the groove 10 of the roller 1 by the scraper 3, and at this time, 4 to 5 mm is exerted by the action such as impact and gravity. Divided into a square bar-shaped dry product H2 of about a degree, and accommodated in, for example, a container 4 installed therebelow.

The perspective view (a) which shows the groove type thermoforming dryer of this invention, the side sectional view (b) which shows a mode that the dry goods after a process are scraped off with a scraper, and the nozzle for a dripping phenomenon prevention to a roller edge part It is a side view (c) which shows the state which provided. It is the front view (a) which shows the channel type thermoforming dryer of this invention, and a side view (b). It is a disassembled perspective view which shows a drive roller and a drive mechanism periphery. It is side surface sectional drawing (a) which shows the operation | movement condition of a groove type thermoforming dryer, and the expanded sectional view in the IV-IV line (b). It is the front view (a) which shows an example of the nozzle provided in a roller edge part, and a side view (b). It is a perspective view which shows a mode that the upward slanting air is ejected from the nozzle to the center side of a roller, and the dripping phenomenon from a roller edge part is prevented. FIG. 4 is a perspective view (a) and a skeletal side view (b) showing a state in which moisture that has flowed out of the workpiece by the biting action of the groove flows along the axial direction of the roller and falls from the vicinity of the end.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Roller 1A Drive roller 1B Follower roller 1a Side peripheral surface 2 Hopper 3 Scraper 4 Container 5 Nozzle 10 Groove 10a Bottom surface 10b Side wall surface 11 Power transmission part 12 Side plate 13 Flange 13a Shaft part 13b Steam flow pipe 14 Bearing 15 Drive mechanism 15a Sprocket motor)
15b Sprocket (Reduction gear)
15c Sprocket (drive roller)
Reference Signs List 16 Heating Mechanism 17 Reducer 18 Chain 19 Rotary Joint 30 Base Shaft 31 Substrate 32 Biasing Plate 33 Sleeve 34 Claw 35 Link 36 Bolt 37 Nut 38 Handle 39 Spring 50 Injection Port A Air D Groove Heating Dryer F Frame M Motor W Moisture H1 Workpiece H2 Dry product HS hose

Claims (4)

A pair of rollers having grooves formed on the side peripheral portions are arranged in contact with each other, and an object to be processed is supplied from a hopper provided above these rollers so as to be hard to enter the grooves of the rollers, and the rollers In an apparatus for drying a processed object by conduction heat from, then scraping the processed object after drying with a scraper from the groove to obtain a dried product,
A nozzle is provided below both ends of each roller, and air is jetted upward from here to prevent moisture that has flowed out of the object to be processed due to the biting action of the groove from dropping from the roller. Groove-type thermoforming dryer.   The air jetted from the nozzle is jetted upward slightly inclined toward the center with respect to the end of the roller, and this causes moisture that tends to stay at the end of the roller to reach the center of the roller as a whole. The groove-type thermoforming dryer according to claim 1, wherein the groove-type thermoforming dryer is dispersed in a vacuum and evaporated.   The grooved thermoforming according to claim 1 or 2, wherein a container for storing a dried product is provided below the roller, and the dried product scraped off by the scraper is accommodated in the container. Dryer.   The groove-type thermoforming drying according to claim 1, 2 or 3, wherein the nozzle is provided with a plurality of injection ports in a range from a contact portion of the roller for biting the workpiece to a lowermost position of the roller. Machine.

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