JP2014195756A - Nozzle device for molding viscous material and band-type drying apparatus with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a nozzle device for molding viscous materials in which the viscous materials pass at the uniform flow rate in a width direction in a nozzle and equal molding is made, and a band-type drying apparatus with the device.SOLUTION: A nozzle device 1 for molding viscous materials concerning the present invention has: a cylindrical nozzle body 5 of a rectangular cross section, having a discharge port 5b at one end, and having a charging hole 5a of the viscous materials at the other end; and a header part 7 with one side connected to the charging hole 5a in the nozzle body 5, and with the other side connected to transport piping for transporting the viscous materials. The header part 7 is set such that a cross section Sof the connection part with the charging hole 5a of the nozzle body 5 is larger than the cross section Sof the connection part with the transport piping, and the viscous materials supplied from the transport piping are made to stay temporarily at the header part 7, and thereby the viscous materials are spread and supplied in the width direction of the nozzle body 5.

Description

  The present invention relates to a viscous material forming nozzle device and a band-type drying device used for forming viscous materials such as sludge (especially sewage sludge), livestock dung, food residues, foods, chemical products, and fertilizers.

For example, Patent Document 1 proposes a multi-stage band-type sludge drying apparatus that forms and dries sludge for the purpose of effectively using a viscous substance, such as 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, “a forming nozzle for an adhesive material composed of a divergent nozzle connected to a transport pipe for transporting an adhesive material, wherein the divergent nozzle at the connection between the transport pipe and the divergent nozzle is used. The flow channel cross-sectional area is 40 to 200% of the flow path cross-sectional area of the divergent nozzle at the outlet of the divergent nozzle. ”(Claim 1 of Patent Document 1) ) Has been proposed.

  By adopting the above configuration for the viscous material molding nozzle, the viscous material can be passed through the nozzle at a uniform flow rate without causing a drift in the nozzle, and can be molded smoothly.

JP 2012-5932 A

  However, in the adhesive material molding nozzle of Patent Document 1, the transport pipe is directly connected to the divergent nozzle. Therefore, the viscous material supplied to the divergent nozzle cannot spread sufficiently in the width direction of the divergent nozzle, and as a result, the flow rate in the nozzle is not uniform, and at the outlet of the divergent nozzle, the center of the divergent nozzle There was a phenomenon that viscous material was quickly discharged from the part.

  The present invention has been made in order to solve such a problem, and includes a viscous material molding nozzle device that can perform uniform molding by allowing a viscous material to pass at a uniform flow rate in the width direction of the nozzle, and the device. The purpose is to obtain a band-type dryer.

(1) A viscous material forming nozzle device according to the present invention includes a cylindrical nozzle body having a rectangular cross section having a discharge port at one end and an inlet for a viscous material at the other end, and the one end side of the nozzle body in the nozzle body. A header portion connected to the loading port, the other end side being connected to a transport pipe for transporting the viscous material,
The header portion is set such that the cross-sectional area of the connection portion with the inlet of the nozzle body is larger than the cross-sectional area of the connection portion with the transport pipe,
The viscous substance supplied from the transport pipe is temporarily retained in the header portion so that the viscous substance is spread and supplied in the width direction of the nozzle body.

(2) Further, in the above (1), the cross-sectional area of the joint portion of the header portion with the nozzle body inlet is coincident with the section of the nozzle body inlet. Is.

(3) In the above (1) or (2), the cross-sectional area of the joint portion of the header portion with the loading port is the cross-sectional area of the joint portion of the header portion with the transport pipe. It is characterized by being set to 2 to 10 times.

(4) Further, in any of the above (1) to (3), the flow path regulating plate that narrows the flow path in the central portion of the molding flow path in the nozzle body than the both sides in the flow path width direction. Is provided.

(5) A band-type drying apparatus according to the present invention includes a band for transporting a viscous material, which is an object to be dried, inside the drying apparatus body, and the viscous material transported by the band is dried with warm air. Because
The viscous material forming nozzle device according to any one of the above (1) to (4) is provided at a charging port into which the viscous material is charged.

  In the present invention, by providing a header part at the inlet of the nozzle body, the viscous substance supplied from the transport pipe is temporarily retained in the header part, so that the viscous substance has a uniform flow rate in the width direction in the nozzle. Passing through, uniform molding is possible.

It is explanatory drawing of the nozzle apparatus for viscous substance shaping | molding which concerns on Embodiment 1 of this invention. It is a top view of the nozzle apparatus for viscous material shaping | molding which concerns on Embodiment 1 of this invention. It is explanatory drawing of the flow-path control board used for the other aspect of Embodiment 1 of this invention. It is explanatory drawing 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]
A nozzle device 1 for forming a viscous material according to an embodiment of the present invention has a cylindrical nozzle body 5 having a rectangular cross section having a discharge port 5b at one end and an inlet 5a for a viscous material at the other end, and one end. The side is connected to the inlet 5a in the nozzle body 5, and the other end has a header portion 7 connected to a transport pipe (not shown) for transporting the viscous material.
In addition, as a viscous substance, sludge (especially sewage sludge), livestock dung, food residue, food, chemical products, fertilizer, etc. are assumed.
Each configuration will be described in detail.

<Nozzle body>
As shown in FIG. 1, the nozzle body 5 is formed in a cylindrical shape having a rectangular cross section having a discharge port 5 b at one end and a viscous material inlet 5 a at the other end.
A nozzle channel having a rectangular cross section through which a viscous substance flows is formed inside the nozzle body 5. In the vicinity of the outlet of the nozzle channel, for example, a plurality of cutting pins or the like may be installed in the width direction so that a viscous substance that flows is formed.

<Header part>
One end of the header portion 7 is connected to the inlet 5a in the nozzle body 5, and the other end is connected to a transport pipe (not shown) for transporting the viscous material. As shown in FIGS. 1 and 2, a flange portion 7 a is provided at a joint portion of the header portion 7 with the transport pipe.
The header portion 7 temporarily supplies the viscous material supplied from the transport pipe so that the viscous material spreads in the width direction of the nozzle body 5 and is supplied.

The cross-sectional area S ₁ (the area of the portion surrounded by the broken line in FIG. 1) of the joint portion with the loading port 5a in the header portion 7 is 10 to 10 times the cross-sectional area S ₂ of the joint portion with the transport pipe in the header portion 7. It is preferable to set to double. By doing in this way, it can implement | achieve effectively that the viscous substance supplied from transport piping spreads in the width direction within the header part 7. FIG.

Further, as shown in FIG. 1, it is preferable that the cross-sectional area of the joint portion of the header portion 7 with the inlet 5 a of the nozzle body 5 coincides with the sectional area of the inlet 5 a of the nozzle body 5.
By doing in this way, since the viscous substance spreading in the width direction in the header portion 7 is supplied as it is over the entire width of the nozzle body 5, the flow path viscous substance in the nozzle body 5 is even in the width direction. It is possible to effectively descend at a speed.

In addition, when the shape of the header part 7 is made trapezoidal in a plan view as shown in FIGS. 1 and 2, the inclination angle θ of the side part from the transport piping side to the nozzle body 5 in the header part 7 is set to 30 °. It is preferable to set it at ˜60 °. By setting the inclination angle θ to 30 ° or more, a sufficient distance from the transport pipe in the header portion 7 to the nozzle body 5 can be secured, and the viscous substance can be sufficiently spread in the width direction in the header portion 7.
In addition, since the volume of the header part 7 increases by increasing the angle θ, there is no problem from the viewpoint of spreading in the width direction. However, since the apparatus is enlarged, the angle θ is preferably set to 60 ° or less. .

  According to the present embodiment configured as described above, the viscous substance supplied from the transport pipe is temporarily retained in the header portion 7 and supplied to the nozzle body 5 while spreading in the width direction. By supplying the viscous material to the nozzle body 5 in a state of spreading in the width direction, the viscous material can flow through the flow path of the nozzle body 5 evenly in the width direction, and evenly in the width direction of the nozzle body 5. Molding becomes possible.

In order to further promote the spread of the viscous material in the width direction in the nozzle flow path, such as when the flow path width of the nozzle main body 5 is wide, a flow path regulating plate 11 as shown in FIG. You may make it insert in the middle of this flow path.
As shown in FIG. 3, the flow path regulating plate 11 is made of a rectangular frame-shaped plate material having an opening 11a, and the opening 11a has a large area in both width directions and a small central portion.

  When the flow path restriction plate 11 is installed, as shown in FIG. 4, it is preferable that a flow path restriction plate insertion portion 13 is provided in the vicinity of the outlet of the nozzle body 5 so that the flow path restriction plate 11 can be attached and detached. . By making it detachable, the flow path regulating plate 11 having different openings 11a can be appropriately selected and inserted depending on the properties of the viscous substance, and the shape of the flow path can be made most preferable.

[Embodiment 2]
The present embodiment relates to a band-type drying device 21 in which the viscous material forming nozzle device 1 used in the first embodiment is provided at the inlet 20 into which the sludge 33 is inserted.
As shown in FIG. 5, the band-type drying device 21 has a plurality of bands (in this example, a first-stage band 23 and a second-stage band 25) that convey the sludge 33 charged in the drying apparatus body 22. It has.
And the sludge 33 supplied from the sludge transport pipe 31 from the sludge storage tank 27 by the sludge transport pump 29 is inserted in the drying apparatus main body 22 via the nozzle apparatus 1 for viscous substance shaping | molding.

The drying apparatus main body 22 is supplied with warm air that has been heat-exchanged with unused exhaust heat or the like by the hot-air generating heat exchanger 35, and sludge 33 that is conveyed by the first-stage band 23 and the second-stage band 25. It is supposed to dry. At that time, in order to dry while suppressing the odor from the 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 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, since the sludge 33 is supplied to the drying apparatus main body 22 via the viscous material forming nozzle device 1, the supplied sludge 33 is uniform in the bandwidth direction, which is efficient. Can be dried.

  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 Viscous material shaping | molding nozzle apparatus 5 Nozzle main body 5a Inlet 5b Outlet 7 Header part 7a Flange part 11 Flow path control board 11a Opening part 13 Flow path control board insertion part 20 Inlet 21 Band type dryer 22 Drying apparatus main body 23 First-stage band 25 Second-stage band 27 Sludge storage tank 29 Sludge transport pump 31 Sludge transport piping 33 Sludge 35 Hot air generating heat exchanger 37 Circulation fan 39 Air introduction fan

Claims (5)

A rectangular nozzle body having a discharge port at one end and a viscous material inlet at the other end, one end connected to the inlet in the nozzle body, and the other end transporting the viscous material A header connected to the pipe,
The header portion is set such that the cross-sectional area of the connection portion with the inlet of the nozzle body is larger than the cross-sectional area of the connection portion with the transport pipe,
A viscous material forming nozzle device characterized in that the viscous material supplied from the transport pipe is temporarily retained in the header portion so that the viscous material is spread and supplied in the width direction of the nozzle body. .   2. The nozzle device for forming a viscous material according to claim 1, wherein a cross-sectional area of a joint portion of the header portion with the inlet of the nozzle main body coincides with a cross section of the inlet of the nozzle main body.   The cross-sectional area of a joint portion between the header portion and the inlet is set to be 2 to 10 times the cross-sectional area of the joint portion between the header portion and the transport pipe. 2. The nozzle device for forming a viscous material according to 2.   The viscosity according to any one of claims 1 to 3, wherein a flow path regulating plate that narrows the flow path in the center portion than the both sides in the flow path width direction is provided in the molding flow path in the nozzle body. Nozzle device for material forming. 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 apparatus comprising the viscous material forming nozzle device according to any one of claims 1 to 4 at a charging port into which a viscous material is charged.

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