JP3284360B2 - Prevention device for clogging of supply nozzle in belt type dryer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt dryer, and more particularly to a dryer capable of preventing a supply nozzle from being clogged, and supplying unnecessary material from a supply nozzle onto a conveyor belt when the apparatus is stopped. Clogging of supply nozzles in belt dryers that can prevent
The present invention relates to a prevention device .

[0002]

BACKGROUND OF THE INVENTION Belt dryers apply a preheated or stirred raw material in a raw material tank to a belt conveyor uniformly through a nozzle or the like via a fixed-rate liquid supply pump, and apply steam,
Conduction heating by a heating plate heated by hot water, etc.
Alternatively, convection heating by hot air or radiant heating by infrared rays or the like is performed so that a desired dry state of the raw material can be obtained at the end of the conveyance by the belt conveyor. For this reason, the drying process can be performed without diluting a high-concentration, high-viscosity raw material that cannot be processed by a spray dryer or the like, and it is possible to save labor and energy in the production process. In addition, the conveyor process by the belt conveyor is divided into multiple sections, and by adjusting the temperature conditions of each section individually, various types of raw materials with different drying conditions can be processed under optimal conditions, and the operation efficiency of the equipment is improved. can do.

[0003] In such a belt-type dryer, when attention is paid particularly to the supply of raw materials, there are the following problems. First, even during normal operation, the raw material remaining at the tip (discharge port) of the supply nozzle after the operation is stopped dries and causes clogging. In addition, even during operation, the tip of the supply nozzle (discharge port) is heated by heat conducted from the inside of the drying tank (heating zone) or heat due to convection, and the raw material is dried and adhered. When grown, the discharge of the raw material becomes non-uniform, and eventually the tip (discharge port) of the nozzle is blocked.

[0004] Further, when the material to be dried becomes over-dried,
When undried and other troubles occur, the supply of raw material from the supply nozzle is stopped, but at this time it remains in the pipeline and supply nozzle even after the supply pump is stopped. The raw material drips on the conveyor belt due to residual pressure or liquid head difference. For this reason, when the transport belt is moving, the raw material hangs on the transport belt for a long time, and the raw material is applied unevenly on the transport belt, causing scorching and causing contamination.
On the other hand, when the conveyor belt is stopped, the raw material is supplied to the same place and stays there, so that processing becomes difficult, and the raw material spills from the side of the conveyor belt and adheres to the back side of the conveyor belt or the inside of the machine. In such a case, the traveling of the conveyor belt becomes unstable, and furthermore, propagation and deterioration of various bacteria may cause contamination.

[0005]

SUMMARY OF THE INVENTION The present invention has been made based on the recognition of such background, and it is possible to prevent the supply nozzle from being clogged and to surely stop the supply of the raw material to the conveyor belt. The technical object of the present invention is to develop a device for preventing clogging of a supply nozzle in a novel belt type drier capable of performing stable supply of raw materials, stable running of a conveyor belt, prevention of generation of contamination, and the like.

[0006]

According to a first aspect of the present invention, there is provided an apparatus for preventing clogging of a supply nozzle in a belt-type dryer, wherein a belt conveyor is provided in a drying tank, and a raw material supply nozzle is disposed at a start end side of the belt conveyor. In a belt dryer in which the raw material is supplied from the supply nozzle to the starting end of the belt conveyor and is dried by heating in the process of transporting the raw material to the terminal end, the supply nozzle is prevented from being clogged at the starting end of the belt conveyor. It has a mechanism,
This clogging prevention mechanism is located vertically on the front surface of the housing of the drying tank.
Comprising a blower so as to face the formed symmetrically inlet blows the air flow parallel flow conditions in the inlet, a blower mechanism configured to cool the supply nozzle by a stream of the parallel flow condition, the housing Supply nozzle inside the body and heating zone
Provided at the starting end side of the belt conveyor to partitioned into a chromatography emissions
And are those consisting comprises a partition plate, the partition plate is provided with an upwardly opening of the feed side, back side both an opening is provided in a portion located Rutotomoni uppermost belt conveyor of the conveyor belt It is characterized by being a thing. According to the present invention, the movement of the atmosphere is performed evenly, the air can be reliably blown to the plurality of supply nozzles, the adhesion of the raw material to the supply nozzle is prevented, and the stable supply of the raw material to the transport belt, Stable traveling of the conveyor belt, prevention of generation of contamination, and the like can be achieved. Further , heat conduction from the heating zone to the supply nozzle installation zone can be prevented, adhesion of the material to the supply nozzle due to curing of the material can be prevented, and clogging of the supply nozzle can be prevented. Change
In addition, the heating zone and the raw material supply zone can be partitioned without obstructing the passage of the raw material and the blast, and heat conduction from the heating zone to the supply nozzle installation zone can be prevented.

According to a second aspect of the present invention, there is provided an apparatus for preventing clogging of a supply nozzle in a belt-type dryer, wherein a belt conveyor is provided in a drying tank, and a raw material supply nozzle is provided at a start end side of the belt conveyor. In a belt dryer in which the raw material is supplied to the start side of the belt conveyor and the raw material is dried by heating in the process of conveying the raw material to the end side, the belt type includes a mechanism for preventing clogging of a supply nozzle at the start end side of the belt conveyor. The clogging prevention mechanism is provided in front of the start of the belt conveyor and below the supply nozzle.
Toys and solvent cleaning mechanism comprising comprises a moving mechanism for positioning the tip of the supply nozzle while the toy is located towards
, And the said moving mechanism, comprising a supply nozzle moving mechanism for translating between the supply nozzle Toys and raw material supply position, and a toy moving mechanism for vertically moving the toy
Be comprised Te made as characterized. According to the present invention, during non-operation or when a trouble occurs, the supply nozzle is immersed in the solvent contained in the toy, so that attachment and growth of the raw material to the supply nozzle can be prevented, and the raw material can be prevented from being transported to the transport belt. Stable supply, stable running of the conveyor belt, prevention of contamination and the like can be achieved. In addition, when the operation is stopped, the supply nozzle is retracted from the raw material supply position, so that the supply of the raw material to the transport belt can be reliably stopped. By preventing the contamination of the transport belt, the transport belt can run stably and contamination can be prevented. Can be done. The object of the present invention is achieved by means of the configuration of the invention described in each of the claims.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A device for preventing clogging of a supply nozzle in a belt type dryer according to the present invention will be described below with reference to the drawings, and the operating state of this device will be described. Reference numeral 1 denotes a belt-type dryer, which is formed by connecting a charging unit 3 and a discharging unit 4 before and after a drying tank 2, and these are surrounded by housings 5 a, 5 b, and 5 c on a gantry B, respectively. Is done. It is preferable that rock wool, glass wool, and the like be appropriately stretched inside the housing 5 to achieve heat insulation from the outside. In this specification, the input unit 3 side is defined as the front side, and the discharge unit 4 side is defined as the rear side. In addition, housing 5
A push blower 15 and an exhaust blower 16 are provided at the upper part. Further, when drying in a vacuum state is required, the housing 5 may be provided with a pressure-resistant structure and a vacuum pump or the like may be provided. .

A belt conveyor 6 is provided, for example, in four stages from the charging section 3 to the discharging section 4.
The belt conveyor 6 has a starting end on the side of the charging section 3 and has a supply nozzle 7 facing the starting end and a scraper unit 8 and a crusher 9 facing the end. Further, in the charging section 3, a clogging prevention mechanism 20 for the supply nozzle 7 is provided. The clogging prevention mechanism 20 includes a blowing mechanism 20A and a solvent cleaning mechanism 20.
There is B.

Hereinafter, various members constituting the belt type dryer 1 will be described in detail with reference to the drawings. First, the belt conveyor 6 is formed by suspending a transport belt 12 between a driving roller 10 driven by a driving motor M ₁ provided outside the discharge unit 4 and a driven roller 11 provided in the input unit 3. , For example, provided in four stages. Of course, the driving roller 10 and the driven roller 11 may be arranged in reverse. The transport belt 12 is formed of metal, fluororesin, polyethylene, polypropylene, or the like, but it is preferable to use a fluororesin impregnated glass cloth or the like.

The belt conveyor 6 is divided into a heating zone 2A on the charging section 3 side and a cooling zone 2B on the discharging section 4 side in the drying tank 2, and a conveyor belt as an example of a heating or cooling means. A heating plate 13 and a cooling plate 14 are provided between the carry side and the return side of 12, respectively. In the present embodiment, the area ratio between the heating zone 2A and the cooling zone 2B is set to 7: 1. The heating plate 13 includes a steam pipe 13a, a hot water pipe 1
3b is connected, and a heat medium such as steam or hot water is circulated by a pump or the like as appropriate. Similarly, a cooling water pipe 14a is connected to the cooling plate 14, and a cooling medium such as cold water is circulated by a pump or the like as appropriate. Incidentally, it is preferable that the heating plate 13 and the cooling plate 14 have a configuration in which the temperature can be individually set.

At the start end of the belt conveyor 6,
As shown in FIG. 1 in an enlarged manner, a supply nozzle 7 for supplying a raw material R, which is a liquid or gel-like material to be dried, is provided so that it can face the transport surface of the transport belt 12. The nozzle 7 is connected to a raw material tank, a fixed-rate liquid sending pump, and the like. As the supply nozzle 7, an appropriate nozzle such as a oscillating type nozzle or a header type nozzle is selected. In the present embodiment, for example, the application is performed simultaneously over the entire area slightly smaller than the width of the transport belt 12. Use a header type that allows

At the end of the belt conveyor 6,
It comprises a scraper unit 8 and a crusher 9 as shown enlarged in FIG. The scraper unit 8 is provided near the boundary between the carry side and the return side of the conveyor belt 12 at the end of the belt conveyor 6 so that the edge of the scraper contacts the conveyance surface of the conveyor belt 12. The crusher 9 includes moving teeth and receiving teeth, and crushes an article located between the moving teeth and the receiving teeth by driving the moving teeth by a drive motor. A chute 17 is provided at the end of the belt conveyor 6 at a slight distance from the conveyor belt 12. The chute 17 has an L-shaped cross section and is conveyed horizontally by the conveyor belt 12. This is a path for taking out the dried product D vertically downward.

Next, a blower mechanism 20A which is an example of the clogging prevention mechanism 20 will be described. The blowing mechanism 20A is shown in FIG.
As shown in FIG. 5, a plurality of openings 21 as openings are formed on the front surface of the housing 5b vertically and horizontally, and a blower 22 is attached to these openings 21.
As will be described later, the blowers 22 have the same blowing capacity and the same blowing direction so that the air flow generated by the blowers 22 in the supply nozzle installation zone 3A becomes a parallel flow. For this purpose, a duct may be appropriately provided.

The raw material nozzle installation zone 3A is a moving space of the supply nozzle 7 by a supply nozzle moving mechanism 26 to be described later, and at least a heating plate 2A in the drying tank 2 is provided by providing a partition plate 23 in the drying tank 2. It is divided and formed. Of course, the partition plate 23 may be provided in the charging section 3 if possible. The partition plate 23 is provided on the casing 5 of the drying tank 2.
a, which is a flat plate-like member fitted in the cross section of FIG. 3A, and has rectangular openings 23a formed in portions located on both the feed side and the return side of the conveyor belt 12 and in the upper part of the uppermost belt conveyor 6. You.

Next, a solvent cleaning mechanism 20B as another example of the clogging prevention mechanism 20 will be described. The solvent cleaning mechanism 20B includes a toy 24, a toy moving mechanism 25, and a supply nozzle moving mechanism 26. The supply nozzle moving mechanism 26 includes a rail 27, a frame 28, an air cylinder 29, and the supply nozzle 7. Two rails 27 are provided along the longitudinal direction above the housing 5b of the loading section 3. Further, the frame 28 is provided with four nozzle supporting rods 28b in a comb tooth shape with respect to the vertical rod 28a, and is provided with the supply nozzle 7 in a suspended state at a lower portion on the free end side with respect to the nozzle supporting rod 28b. A wheel 28c is provided on the uppermost nozzle support rod 28b. The frame 28 is mounted so that the wheels 28c roll on the two rails 27, and a rod 29a of an air cylinder 29 fixed to the housing 5b is fixed above the vertical rod 28a. Therefore, the frame 28 moves back and forth by the expansion and contraction of the rod 29a.

The toy 24 is a box-shaped member having an open upper surface. The toy 24 has a valve 24a and a valve 24b on its side surface.
4c is connected to the valve 24b.
d is connected. The washing water supply pipe 24c is connected to an appropriate pump (not shown), a tank containing the washing water, and the like.
On the other hand, the washing water discharge pipe 24d is connected to an appropriate pump. Here, the washing water is a solvent (water or the like) of the raw material R.
Means Four toys 24 are provided as an example corresponding to the number of supply nozzles 7, and they are installed in front of the start end of the belt conveyor 6.

The toy moving mechanism 25 includes the toy 2
4, for example, as shown in FIG. 4, the toy 24 is fixed to a vertical rod 25a slidably movable up and down by a slide way or the like as shown in FIG. A rack 25b is provided and a pinion 25c meshing with the rack 25b is connected to a drive motor M
_The vertical rod 25a is moved up and down by being driven by ₂ .

Further, a control panel is appropriately provided, and the supply nozzle 7, the crusher 9, the heating plate 13, the cooling plate 14,
Push blower 15, the exhaust blower 16, the blower 22, the valve 24a, the valve 24b, the driving motor M _2, the air cylinder 29, to connect the drive motor M _1, and performs the operation of the belt dryer 1 with centralized control of these You may do so.

The device for preventing clogging of the supply nozzle in the belt-type dryer 1 of the present invention is configured as described above. The operation state of the belt-type dryer 1 will be described below. First, a pump or the like is started appropriately, and a heat medium such as steam or hot water is supplied to the heating plate 13 via the steam pipe 13a and the hot water pipe 13b. Similarly, a cooling medium such as cold water is supplied to the cooling plate 14 via the cold water pipe 14a. At this time, as shown in FIG. 5A, the air cylinder 29 is in a contracted state, the supply nozzle 7 is on standby on the front side, and the toy 24 is in a raised state. On the other hand, the discharge port of the supply nozzle 7 is immersed.

[0021] Then the heating plate 13 and starts the drive motor M ₁ reaches the cooling plate 14 is preset temperature, driving the conveyor belt 12 in the belt conveyor 6. Further, the push-in blower 15 and the exhaust blower 16 are started to circulate and ventilate the atmosphere in the drying tank 2. Furthermore, when drying in a vacuum state is required, the vacuum pump is started as appropriate.

Next, the drive motor M ₂ is started to activate the toy 2
4 is lowered so that the supply nozzle 7 immersed in the solvent filled in the toy 24 can be moved in the horizontal direction. Next, as shown in FIG. 5B, the blower 22 is started, and a parallel flow is blown toward the supply nozzle 7 located in the raw material nozzle installation zone 3A in the charging section 3. Next, the supply nozzle moving mechanism 26 (air cylinder 29) is driven,
Move the supply nozzle 7 to the start end of the conveyor belt 12 (raw material supply position)
Face.

Next, the raw material R preheated or agitated in a raw material tank (not shown) is uniformly distributed on the transporting belt 12 by the supply nozzle 7 via the fixed-rate liquid supply pump as shown in FIG. Apply. At this time, the supply nozzle 7 is cooled by the parallel flow, and the heating zone 2A and the supply nozzle installation zone 3A are partitioned by the partition plate 23 to prevent heat radiated from the heating plate 13 from being conducted to the supply nozzle 7. The adhesion and growth of the raw material R accompanying the hardening of the raw material at the discharge port of the supply nozzle 7 can be prevented.

The raw material R applied to the conveyor belt 12
Is transported and heated by the heating plate 13 in the heating zone 2A as the transport belt 12 advances, and the solvent such as water evaporates, and subsequently is cooled by the cooling plate 14 in the cooling zone 2B. Then, at the end of the conveyance by the belt conveyor 6, a dried product D which has been subjected to a desired drying process is obtained.

When the dried product D on the conveyor belt 12 reaches the vicinity of the end of the belt conveyor 6, most of the dried product D is a chute 17
The remaining dried product D adhered to the conveyor belt 12 is directed to the scraper unit 8. Then, in the crusher 9, the dried product D is crushed to an appropriate size and discharged from the chute 17 downward. On the other hand, the dried product D reaching the scraper unit 8
Is peeled off from the conveyor belt 12 and falls below the chute 17.

The operation of the belt-type dryer 1 for obtaining the dried product D from the raw material R as described above is stopped when the operation is continued normally and the predetermined amount of drying processing is completed. This is the time when overdrying and undried products occur due to poor drying. In any case, the operation of the belt-type dryer 1 is stopped as follows. First, the valve provided in the raw material tank connected to the supply nozzle 7 is closed, and the fixed-quantity liquid supply pump is stopped. Next, the supply nozzle moving mechanism 26
Is started, and the supply nozzle 7 is retracted above the toy 24. Subsequently, the toy moving mechanism 25 is activated, the toy 24 is raised, and the discharge port of the supply nozzle 7 is immersed in the solvent in the toy 24 (see FIG. 5A). At this time, the supply nozzle 7
The raw material R remaining in the dryer dries from the discharge port due to the residual pressure and the head difference, but the toy 24 receives this and does not stain the inside of the belt-type dryer 1. In addition, since the raw material R located at the discharge port of the supply nozzle 7 is dissolved in the solvent,
The discharge port is not clogged with the raw material R. Of course, the detection of the over-dried product and the undried product and the operation of the belt-type dryer 1 may be performed by visual observation and judgment by an operator, or may be automatically performed by a control panel by providing appropriate detection means. You can do it too.

[0027]

The present invention has the above-described configuration and has the following effects. According to the present invention, clogging of the supply nozzle 7 can be prevented, and unnecessary material R is supplied onto the transport belt 12 from the supply nozzle 7 when the operation of the belt dryer 1 is stopped. Therefore, stable supply of the raw material R, stable running of the conveyor belt 12, prevention of generation of contamination, and the like can be performed, and the production of the dried product D can be performed efficiently.

[Brief description of the drawings]

FIG. 1 is a side view showing a belt-type dryer provided with a clogging prevention device of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is an enlarged perspective view showing a charging section.

FIG. 4 is a side view showing a toy moving mechanism.

FIG. 5 is an explanatory diagram showing the operation of the input unit in a stepwise manner.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Belt type dryer 2 Drying tank 2A Heating zone 2B Cooling zone 3 Injection part 3A Supply nozzle installation zone 4 Discharge part 5 Housing 5a Housing 5b Housing 5c Housing 6 Belt conveyor 7 Supply nozzle 8 Scraper unit 9 Crusher 10 Drive roller 11 Follower roller 12 Conveyor belt 13 Heating plate 13a Steam pipe 13b Hot water pipe 14 Cooling plate 14a Cold water pipe 15 Push-in blower 16 Exhaust blower 17 Chute 20 Clogging prevention mechanism 20A Blow mechanism 20B Solvent cleaning mechanism 21 Inlet 22 Blower 23 Partition Plate 23a Opening 24 Toy 24a Valve 24b Valve 24c Wash water supply pipe 24d Wash water discharge pipe 25 Toy moving mechanism 25a Vertical rod 25b Rack 25c Pinion 26 Supply nozzle moving mechanism 27 Rail 28 Frame 28a Vertical Rod 28b nozzle supporting rod 28c wheel 29 the air cylinder 29a a rod B frame D dry product M ₁ driving motor M ₂ driving motor R feedstock

──────────────────────────────────────────────────続 き Continuing on the front page (72) Katsuhiko Harada, Inventor 992, Nishioki, Okihama-shi, Aboshi-ku, Himeji-shi, Hyogo Nippon Shokubai Himeji Works Co., Ltd. (56) References JP-A-57-153702 (JP, A) JP-A-5-253404 (JP, A) JP-A-63-148967 (JP, A) JP-A-9-99 79747 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) F26B 17/00 F26B 21/00

Claims (2)

(57) [Claims] 1. A belt conveyor is provided in a drying tank, a raw material supply nozzle is disposed at a start end side of the belt conveyor, and a raw material is supplied from the supply nozzle to a start end side of the belt conveyor. In a belt-type dryer that dries by heating in a conveying process, a clogging prevention mechanism of a supply nozzle is provided at a start end side of the belt conveyor, and the clogging prevention mechanism is vertically arranged on a front surface of a casing of a drying tank. A blower that is provided with a blower facing the symmetrically formed inlet, blows an airflow in a parallel flow state to the inlet, and cools a supply nozzle by the airflow in the parallel flow state; and Supply nozzle installation zone inside the housing
And a partition plate provided at the start end side of the belt conveyor for partitioning the belt into a heating zone and a heating zone , wherein the partition plate has openings at portions located on both the feed side and the return side of the conveyor belt. clogging prevention device of the supply nozzle in the belt dryer, characterized in that Rutotomoni is provided with a upward opening of the uppermost belt conveyor provided. 2. A belt conveyor is provided in a drying tank, a material supply nozzle is provided at a start end side of the belt conveyor, and a material is supplied from the supply nozzle to a start end side of the belt conveyor. In a belt-type dryer that dries by heating in a conveying process, a clogging prevention mechanism for a supply nozzle is provided at the start end side of the belt conveyor, and the clogging prevention mechanism is located forward of the start end of the belt conveyor and the supply nozzle. And a toy located below
This is a solvent cleaning system comprising comprising a moving mechanism for positioning the tip of the supply nozzle into the toy, the moving mechanism, the supply nozzle for translating between the supply nozzle Toys and raw material supply position Moving mechanism and vertical movement of toys
An apparatus for preventing clogging of a supply nozzle in a belt-type dryer , comprising a toy moving mechanism for performing the operation .