JP6015524B2 - Nozzle device for forming viscous material and band-type drying device provided with the device - Google Patents

Description

  The present invention relates to a viscous material forming nozzle device used for forming viscous materials such as sludge (especially sewage sludge), livestock dung, food residue, food, chemical products, fertilizer, and the like, and a band-type drying device provided with the device. It is.

For example, Patent Document 1 proposes a multi-stage band-type sludge drying apparatus that molds and sludges sludge for the purpose of effectively using sludge.
In the multi-band type sludge drying apparatus proposed in Patent Document 1, dehydrated sludge is supplied from a sludge storage tank to a forming nozzle by a sludge transport pump and formed into a rod shape, and the formed formed sludge is dried. .

  In Patent Document 1, as a forming nozzle, “in a sludge molding cylindrical nozzle having a rectangular cross section, a plurality of pins that divide the rectangular cross section into a rectangular long side direction are arranged, and the pin is connected to the nozzle. A sludge molding nozzle characterized in that it is provided with pin insertion / removal means for insertion / removal to / from "(see claim 1 of Patent Document 1) has been proposed.

  In the sludge molding nozzle described above, when sludge is supplied to the cylindrical portion and extruded, the sludge is cut into a rod shape by a pin that divides the rectangular cross section in the longitudinal direction.

JP 2012-24678 A

In the thing of patent document 1, the arrangement | positioning relationship between the cylinder part and pin in the cylindrical nozzle for sludge molding is not prescribed | regulated in particular.
When sludge is cut by a plurality of cutting pins arranged in parallel, the sludge is consolidated by the cutting pin when it is cut by the cutting pin, and expands after passing through the cutting pin. Therefore, there is a possibility that the cut sludge adheres again to each other after passing through the cutting pin.

  The present invention has been made to solve such a problem, and obtains a viscous material molding nozzle device that can form a viscous material such as sludge without adhering after passing through a pin, and a band-type drying device equipped with the device. The purpose is that.

(1) A viscous material molding nozzle device according to the present invention is continuous with a charging port through which a viscous material is charged, a molding channel through which the viscous material is inserted, and a lowermost end of the molding channel. A cylindrical main body having a tapered portion that extends in the width direction and a discharge port through which the viscous material that has passed through the molding flow path is discharged,
A cutting pin provided on the discharge port side of the main body portion for cutting the viscous material that has passed through the molding flow path;
The loading port is provided on the upper surface of the main body and the discharge port is provided on the lower surface of the main body.
A plurality of the cutting pins are provided at predetermined intervals in the intersecting direction of the molding flow path, and are provided at the boundary between the taper portion and the molding flow path .

( 2 ) Moreover, the band type drying apparatus according to the present invention includes a band that conveys a viscous substance that is an object to be dried inside the drying apparatus main body, and the band type drying apparatus that dries the viscous substance conveyed by the band with hot air. A drying device,
The viscous material forming nozzle device described in the above (1 ) is provided at a charging port into which the viscous material is charged.

  In the present invention, since the cutting pin is disposed at the most distal portion of the molding flow path, it can be molded without adhering to the adjacent viscous substance after passing through the cutting pin.

It is explanatory drawing of the principal part of the nozzle apparatus for viscous substance shaping | molding which concerns on Embodiment 1 of this invention. It is a perspective view explaining the whole structure of the nozzle apparatus for viscous substance shaping | molding which concerns on Embodiment 1 of this invention. It is a side view explaining the whole structure of the nozzle apparatus for viscous substance shaping | molding which concerns on Embodiment 1 of this invention. It is explanatory drawing of the comparative example for demonstrating the effect of Embodiment 1 of this invention. It is explanatory drawing of the principal part of the other aspect of the nozzle apparatus for viscous substance shaping | molding which concerns on Embodiment 1 of this invention. It is explanatory drawing explaining the whole structure of the band type drying apparatus which concerns on Embodiment 2 of this invention.

[Embodiment 1]
As shown in FIGS. 1 to 3, the viscous material forming nozzle device 1 according to Embodiment 1 of the present invention includes a charging port 5 a into which dehydrated sludge 3 as a viscous material is charged and dehydrated sludge charged. 3 is provided on the side of the discharge port 5c of the main body 5 and a cylindrical main body 5 having a molding flow path 5b through which the gas flows 3 and a discharge port 5c through which the dewatered sludge 3 that has passed through the molding flow path 5b is discharged. And a cutting pin 7 that cuts the dewatered sludge 3 that has passed through the molding flow path 5b. A plurality of the cutting pins 7 are provided at predetermined intervals in the crossing direction of the molding flow path 5b, and the outermost of the molding flow path 5b. It is arranged at the tip.
Hereinafter, each configuration will be described in detail.

<Main body>
As shown in FIG. 2, the main body portion 5 has a cylindrical shape having a rectangular cross section, a cylindrical hole is a molding flow path 5 b, and an inlet 5 a that opens on the upper surface of the main body portion 5 is provided. The discharge port 5 c is formed of a rectangular recess provided on the lower surface of the main body 5.
The main body 5 has a tapered portion 5d that extends in the width direction (short side direction) continuously from the most distal end (lowermost end) of the molding flow path 5b (see FIG. 1).
By providing the taper portion 5d, a space for inserting the cutting pin 7 can be secured in the main body portion 5, and there is no need to separately provide a holding portion for holding the cutting pin 7 so as to be freely inserted and removed.

<Cut pin>
As shown in FIG. 2, a plurality of cutting pins 7 are provided in the width direction of the molding channel 5b at the boundary between the taper portion 5d of the main body 5 and the molding channel 5b, and flow through the molding channel 5b. The dewatered sludge 3 to be cut is cut.
A plurality of cutting pins 7 (eight in this example) are connected to one connecting plate 13, and the connecting plate 13 reciprocates the connecting plate 13 in a direction orthogonal to the molding flow path 5b. Hydraulic cylinder etc.) are connected. A plurality of cutting pins 7, a connecting plate 13, and an actuator 11 constitute one unit. When each actuator 11 is operated, the cutting pin 7 can be inserted into and removed from the molding flow path 5b in units. Yes.

  As shown in FIGS. 1 and 2, the cutting pin 7 is normally inserted into the molding channel 5b, and the dewatered sludge 3 flowing in a plate shape in the molding channel 5b is cut into the cutting pin. 7 is cut and formed into a rod shape. 1A is a longitudinal sectional view of the viscous material forming nozzle device 1 passing through the center of the cutting pin 7 in the vicinity of the cutting pin 7, and FIG. 1B is a cross-sectional view taken along line A- in FIG. It is A arrow view

  When a foreign matter such as hair in the dewatered sludge 3 is entangled so as to straddle the cutting pin 7, the actuator 11 is operated and the cutting pin 7 is once extracted from the molding flow path 5b. Thereby, the foreign matter entangled with the cutting pin 7 comes off from the cutting pin 7 and is pushed out together with the dewatered sludge 3. Thereafter, the actuator 11 is operated to return the cutting pin 7 to the state where it is inserted into the molding flow path 5b again.

An example of a method for forming the dewatered sludge 3 using the viscous material forming nozzle device 1 according to the present embodiment configured as described above will be described.
When the dewatered sludge 3 is inserted from the inlet 5a of the viscous material forming nozzle device 1, it is formed into a plate shape by passing through the forming flow path 5b, and then cut into a rod shape by the cutting pin 7, thereby forming the formed sludge. 33.
Since the molded sludge 33 is consolidated in the width direction by the cutting pin 7 at the time of cutting, it tends to expand in the width direction after cutting.

  However, in the present embodiment, the cutting pin 7 is disposed at the most distal portion of the molding flow path 5b, so that the molded sludge 33 after cutting is formed on the wall surface of the molding flow path 5b as shown in FIG. Hanging in a free state without touching etc. For this reason, the molded sludge 33 is pulled downward by its own weight and is elongated, so that the diameter is reduced. For this reason, the effect | action which the shaping | molding sludge 33 after a cutting | disconnection tries to expand | swell in the width direction is canceled by the effect | action that a diameter becomes thin, and the shaping | molding sludge 33 does not expand | swell in the width direction, and adjacent shaping | molding sludge 33 adheres. There is no.

On the other hand, if the cutting pin 7 is disposed in the middle of the molding flow path 5b as shown in FIG. 4 (a), the molding sludge 33 has its own weight due to friction with the wall surface of the molding flow path 5b. There is a possibility that the film will expand after passing through the cutting pin 7 without adhering sufficiently, and may adhere to each other (see the circled part in FIG. 4B).
4 is a longitudinal sectional view passing through the center of the cutting pin 7 in the vicinity of the cutting pin 7, and FIG. 4B is a cross-sectional view taken along the line BB in FIG. It is an arrow view.

  In the above description, the main body portion 5 is provided with a tapered portion 5d that extends in the width direction continuously at the forefront of the molding flow path 5b, and the cutting pin 7 is disposed at the boundary between the taper portion 5d and the molding flow path 5b. However, as shown in FIG. 5, the cutting pin 7 may be disposed at the most distal end portion of the molding flow path 5b without providing the tapered portion 5d. In this case, the forefront of the molding flow path 5b is a discharge port. In this case, a holding part for holding the cutting pin 7 so as to be freely inserted and removed is provided separately.

  As described above, in the present embodiment, by arranging the cutting pin 7 at the most distal portion of the forming flow path 5b, the forming sludge 33 can be formed without adhering to each other after passing through the cutting pin 7.

[Embodiment 2]
This embodiment relates to a band-type drying device 21 provided with the viscous material forming nozzle device 1 used in the first embodiment.
As shown in FIG. 6, the band-type drying device 21 includes a plurality of bands (in this example, a first-stage band 23 and a second-stage band) that convey the viscous material (sludge) charged in the drying apparatus body 22. A band 25) is provided.
Then, the dewatered sludge 3 supplied from the sludge transport pipe 31 by the sludge transport pump 29 from the sludge storage tank 27 is formed into the formed sludge 33 by the viscous material forming nozzle device 1 and is inserted into the drying device main body 22. I have to.

The drying apparatus main body 22 is blown by warm air that has been heat-exchanged with unused exhaust heat or the like by the warm air generating heat exchanger 35 and is conveyed by the first-stage band 23 and the second-stage band 25. Is supposed to dry. At that time, in order to dry while suppressing the odor from the formed sludge 33 as much as possible, it is preferable to set the temperature of the hot air to 170 to 240 ° C. and form a solidified film on the surface of the formed sludge 33. .
Note that most of the hot air is circulated in the hot air generating heat exchanger 35 and the drying device main body 22 by the circulation fan 37, part is introduced from the atmosphere by the air introduction fan 39, and part is by the exhaust treatment device (not shown). Exhausted.

  In the present embodiment, the molding sludge 33 is supplied to the drying apparatus main body 22 via the viscous material molding nozzle device 1, so that the supplied molding sludge 33 adheres to each other after passing through the cutting pin 7. Therefore, efficient drying is possible.

  In the present embodiment, a plurality of bands are provided. However, the present invention can be similarly implemented even in the case of only one band.

DESCRIPTION OF SYMBOLS 1 Nozzle apparatus for viscous substance shaping | molding 3 Dehydration sludge 5 Main body part 5a Inlet 5b Molding flow path 5c Outlet 5d Tapered part 7 Cutting pin 11 Actuator 13 Connecting plate 21 Band type dryer 22 Dryer main body 23 First stage band 25 2 Stage band 27 Sludge storage tank 29 Sludge transport pump 31 Sludge transport piping 33 Molded sludge 35 Hot air generating heat exchanger 37 Circulation fan 39 Air introduction fan

Claims (2)

Passed through the molding channel, the inlet through which the viscous material is charged, the molding flow channel through which the viscous material charged flows , the taper portion extending in the width direction continuously to the lowermost end of the molding channel A cylindrical main body having a discharge port through which the viscous substance is discharged;
A cutting pin provided on the discharge port side of the main body portion for cutting the viscous material that has passed through the molding flow path;
The loading port is provided on the upper surface of the main body and the discharge port is provided on the lower surface of the main body.
A nozzle device for forming a viscous substance, wherein a plurality of the cutting pins are provided at predetermined intervals in the intersecting direction of the forming flow path, and are provided at a boundary between the taper portion and the forming flow path . A band-type drying device that includes a band for transporting a viscous material, which is an object to be dried, inside the drying device main body, and for drying the viscous material transported by the band with warm air,
A band-type drying device comprising the nozzle device for forming a viscous material according to claim 1 at an inlet into which the viscous material is charged.