JPS585908Y2 - Kansou Souchi - Google Patents

Description

[Detailed description of the invention] The present invention circulates and transports a large number of transport carriers in the vertical direction with respect to a drying chamber, attaches a substance to be dried to the transport carriers, and after drying in the drying chamber, The present invention relates to a drying device configured to separate substances from said transport carrier.

As described above, as a type of drying apparatus for drying a substance to be dried by adhering it to a transport carrier, there has been a conventional drying apparatus developed in Japanese Patent Application Laid-open No. 49
The technique described in Japanese Patent No. -92652 is disclosed.

However, in this conventional device, the container installed in the downstream path for introducing the material to be dried from the outside is approximately the same as the upper end of the outer cylinder of the screw conveyor, which is installed as a lifting device for the conveyance carrier. Because it is installed higher than the screw conveyor, when the amount of wet and dry material supplied to the container is large, the wet and dry material overflows into the screw conveyor, flows downward through the cylinder, and solidifies. This may cause the inconvenience of becoming unable to lift.

The present invention reliably prevents the wet materials to be dried from flowing back toward the lifting device as described above, and further enables the drying process to be carried out by uniformly dispersing the transport carriers to which the materials to be dried are attached into the drying chamber. The purpose is to provide a drying device that can perform drying efficiently.

The characteristic structure of the drying apparatus according to the present invention is that a lifting device is provided at a position eccentric from the axis of the drying chamber to lift the material to be dried after dropping onto the transport carrier. A flow path is provided at the far end of the drying chamber from the upper end of the upper device toward the upper part of the drying chamber, and a container for immersing the carrier carrier in the substance to be dried is provided at the end of the flow path. provided, and the top of the peripheral wall of the container on the opposite side to the flow path,
The container is configured to be located below the lower edge of a communication port that communicates the lifting device with the downstream path, and further, a protrusion is provided on the circumferential surface of the container so that the container rotates around a horizontal axis. The point is that a rotating body for scraping out the transport carrier is provided.

The effect of this configuration is that the extremely simple structure of locating the upper end of the container below the upper end of the outer cylinder of the screw conveyor prevents backflow to the lifting device side, and once the dried material is This has the advantage of avoiding the inconvenience of rewetting the dried material.

Furthermore, since a rotating body for scraping out the carrier carrier is provided in the container provided at the end of the downstream path, this rotating body scatters and supplies the carrier carrier into the drying chamber. This has the advantage that it is possible to avoid concentrated supply to only one part of the drying chamber, allowing efficient drying processing to be performed with less risk of uneven drying in the drying chamber, and in addition, the material to be dried, which has a particularly low viscosity, can be supplied. In such cases,
Since it is possible to scrape out not only the transport carrier but also the drying material with low viscosity into the drying chamber, it is possible to increase the adhesion efficiency of the drying material by applying the drying material with low viscosity to the transport carrier, which has slightly warmed up in the drying chamber, later. It also has measurable advantages.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

A mesh body 3 forming the bottom of the drying chamber 2 is provided in a cylindrical housing 1, and a blade member 4 that is driven and rotated is installed along and close to the top surface of the mesh body 3 for drying. It constitutes a dropping device B that drops the material to be dried later from the transport carrier 9.

Further, a supply pipe 5 is provided for introducing high-temperature gas such as high-temperature gas from a hot air generating furnace or high-temperature factory magic gas into the drying chamber 2 as a heating gas. An exhaust pipe 6 for discharging gas is connected to the upper part of the drying chamber 2.

A drying material recovery space 7 is provided below the drying chamber 2,
Both chambers 2 and 7 communicate with each other through the eyes of the reticular body 3, and a rotary valve 8 that is driven and rotated is located below the recovery space 7.
is provided.

The rotary valve 8 discharges the fallen dried material from the recovery space 7 while blocking outside air from flowing into the recovery space 7 .

A container 10 for immersing the transport carrier 9 into the substance to be dried is provided above the drying chamber 2, and a rotating blade 1 is provided for scraping out the transport carrier 9 from inside the container 10 and supplying it into the drying chamber 2.
1 is placed horizontally, thereby forming an adhesion device A for adhering the wet material to be dried supplied from the supply pipe 12 to the conveyance carrier 9.

In the drying chamber 2, the transport carrier 9 in a filled state falls under its own weight, and during the fall, the heating gas sent from the supply pipe 5 and the material to be treated adhering to the transport carrier 9 come into countercurrent contact, and the material to be treated is removed. The treated material is evaporated to dryness.

As shown in FIG. 2, the transport carrier 9 that has reached the lower part of the drying chamber 2 moves toward the carrier take-out hole 13 provided at the center of the net-like body 3 as the spiral blade member 4 rotates in plan view. At the same time, the dried substance adhering to the transport carrier 9 is pressed and slid onto the upper surface of the mesh body 3.
The substance to be treated is separated from the transport carrier 9 and the drying chamber 2
This prevents the bridging phenomenon of the transport carrier 9 within.

The transport carrier 9 sent to the extraction hole 13 is transferred to the lower inclined cylinder 14
The material falls within the housing 1, is sent to the lower end of the screw conveyor 15, which is a lifting device located outside the housing 1, and is then conveyed to the upper end of the screw conveyor 15.

This upper end is located above the adhesion device A, and the upper end and the adhesion device A are connected by a flow path C in the upper inclined cylinder 16.

The transport carrier is then sent back to the deposition device A from the upper end of the conveyor 15 through the downstream path C.

The upper end of the outer cylinder 15a of the screw conveyor 15 located at the communication port between the screw conveyor 15 and the upper inclined cylinder 16 constituting the downstream path C is located at the lower edge 1 of the communication port.
5b is provided at a position higher than the upper end 10a of the container 10 so that the material to be dried supplied into the container 10 overflows from the container 10 without flowing into the screw conveyor. It's Nishide.

In this way, a path for circulating and transporting a large number of transport carriers 9 to and from the drying chamber 2 is constructed.

At least the lower part of the portion 14' of the lower inclined cylinder 14 located in the recovery space 7 is configured in a net shape, so that when the transport carrier 9 falls inside the cylinder 14, no particles remain attached to the carrier 9. If so, the material to be dried is separated and recovered.

The transport carrier 9 is generally a sphere made of plastic, metal, heat-resistant elastic material, etc., but various other materials or shapes can be used.

Furthermore, if the carrier is made of a material with a large coefficient of thermal expansion, it is convenient because the substance to be dried and the carrier can be easily and reliably separated as the material is cooled after drying.

Furthermore, as mentioned above, if the lifting device such as the screw conveyor 15 is located outside the drying chamber 2, the heating gas can be supplied into the drying chamber 2 at a high temperature of, for example, 300°C to 400°C, thereby improving efficiency. Although drying is convenient, the lifting device may be located within the drying chamber 2.

Furthermore, typical target substances to be dried include sewage sludge and wastewater from steel rolling processes, but the present invention can be applied to various other substances.

Further, the heating gas can be used in various forms, such as a method in which it is discharged once it is used, or a method in which it is reheated in whole or in part and reused.

In particular, when drying materials that tend to generate odors, such as sewage sludge, it is recommended to use a heating gas recycling method and perform deodorization treatment while the concentration of odorous components in the gas is appropriately high. preferable.

Further, it is convenient to form the dried substance into a lump and incinerate it, and use the thermal energy generated by the incineration as a heat source for drying.

[Brief explanation of drawings]

The drawings illustrate an embodiment of the drying apparatus according to the present invention, in which FIG. 1 is a schematic longitudinal cross-sectional view, and FIG. 2 is a cross-sectional view taken along the line ■■-■■ in FIG. 1. 2...Drying room, 5...Gas supply pipe, 9
...Transportation carrier, 10...Container, 10
a...Top end of container, 11...Rotating blade, 12...Dried material supply pipe, 15...
- Screw conveyor, 15a... Outer cylinder of the screw conveyor, 15b... Upper end of the outer cylinder of the screw conveyor, B... Falling device.

Claims (1)

[Scope of utility model registration request] A lifting device 15 is provided at a position eccentric from the axis of the drying chamber 2 to lift up the transport carrier 9 after dropping off the material to be dried after drying. A downstream path C is provided at the lower end of the innermost side of the drying chamber 2 toward the inner upper space of the drying chamber 2, and a container 10 for immersing in the transport carrier 9 and the substance to be dried is provided at the end of this downstream path C. , the lower edge 1 of the insertion port that communicates the lifting device 15 and the downstream path C by connecting the top portion 10a of the peripheral wall of the container 10 on the opposite side to the downstream path C.
5b, and further provided in the container 10 is a rotating body for scraping out the transport carrier, which has a protrusion on its circumferential surface and rotates around a horizontal axis. A drying device featuring: