JPS58213179A - Heating drier - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for continuously heating and drying various materials.

For example, this type of device includes multiple infrared lamps placed above the belt conveyor along the conveyance path of the belt conveyor, and a thermometer installed near the material discharge end of the belt conveyor to measure the heating temperature of the material. Nine devices are known. In this device, the material supplied to the supply end of the belt conveyor is transferred as the belt moves, and during this transfer it is heated by radiation from an infrared lamp, and the heating temperature is measured with a thermometer near the discharge end. be done.

At this time, if the thermometer detects that the temperature is not heated to the desired temperature, the amount of heat generated by the infrared lamp, which is the heat source, should be adjusted based on this detection power. Although it is controlled, it takes a considerable amount of time to reach a predetermined amount of heat generation, that is, the response is poor.

This partly depends on the heat capacity of the infrared lamp itself, but
The same can be said of other general heat sources.

In particular, when the material is heated higher than the desired temperature, the temperature or calorific value of the heat source must be lowered, but as mentioned above, the response is poor and the material ends up being overheated. In some cases, the quality may deteriorate and burn out.

The present invention has been made in view of the above-mentioned points, and an object of the present invention is to provide a heating drying apparatus that has excellent resistance to heat adjustment of a material and, in particular, can prevent overheating of the material. This object, according to the invention, includes a material transfer means, a heat source disposed above it along the transfer path of the material transfer means, and a heat source for measuring the heating temperature of the material in the vicinity of the material discharge end of the material transfer means. A heating drying apparatus comprising a temperature detecting means, a radiation shielding means movable between the heat source and a transfer path of the material transporting means so as to at least partially shield radiation from the heat source. and moving the radiation shielding means between or between the heat source and the transfer path of the material transfer means based on the detection force of the temperature detection means to determine the heating temperature of the material. This is achieved by a heating drying device characterized by adjusting the temperature.

Hereinafter, a heating drying apparatus according to an embodiment of the present invention will be described with reference to the drawings.

In Figure 1, (1) is a steel belt conveyor, and the driving wheel (2) and driven wheel (3) are connected to the steel belt (
4) is wound and runs in the direction shown by the arrow.

According to this embodiment, carbon black is supplied to the supply end side of such a belt conveyor (1) from a material supply device (5).The material supply device (5) has a hopper (6) for storing carbon black and , and an electromagnetic feeder (7) that supplies the carbon black discharged from the belt conveyor to a belt conveyor (1).The electromagnetic feeder (7) is well known, so its details will be omitted, but it is indicated by an arrow. Due to the vibration of the trough, the carbon black is transported to the right.

The carbon black supplied onto the belt conveyor (1) is transferred to the right by riding on the steel bell (4) Ic of the belt conveyor (1), and is transferred to the discharge end side 1. (1b), along the transfer path of the belt conveyor (1), there is a far-infrared radiator (8) above this as a heat source.
The carbon black on the belt conveyor (1) is heated by receiving far infrared rays. That is, the water adhering to the carbon black to be heated and dried absorbs far infrared rays, is heated, and is discharged from the discharge end side (1b). A radiation thermometer (9) is disposed near the discharge end side (1b), and the heating temperature is measured by radiation from the discharged direct current carbon black.

According to the present invention, the shielding plate Q0 is further movable in the left-right direction between the far-infrared radiator (8) and the belt conveyor (1).
The motor (6) that drives the motor (6) is supplied with a control voltage from the controller (2) which is supplied with the detection power of the thermometer (9). The far infrared rays are respectively supplied to the radiators (8).

Now, when the shielding plate α0 is located at the non-shielding position shown by the dashed line, the thermometer (9) and the controller (2) detect that the thermometer (9) and the controller (2) are heated higher than the desired temperature. The plate α0 is driven by the motor (b) to the shielding position shown by the solid line, and the two far-infrared radiators (8
) to prevent far infrared rays from hitting the carbon black on the downstream side of the belt conveyor (1). The far-infrared radiator (8) is made of, for example, a ceramic and a heating wire that heats it, and the far-infrared rays are emitted from the ceramic, but even if you try to reduce the amount of heat generated by the heating wire by the output from the controller @, it will not respond. Although it is difficult and takes a considerable amount of time, according to this embodiment, the far infrared rays from the far infrared radiator (8) are immediately blocked, albeit partially, by the shielding plate σO. ) the heating temperature immediately decreases and approaches the desired heating temperature.

After reaching this desired heating temperature, the shielding plate α1 may be moved to the non-shielding position shown by the dashed line, or it may be gradually moved to the non-shielding position according to changes in the detection force of the thermometer (9). It may also be moved by moving.

The upper surface of the shielding plate α0 is preferably a polished stainless steel surface in order to improve the reflectance of far-infrared rays from the far-infrared radiator (8).

FIG. 2 shows a modification of the shielding plate αq shown in FIG. This is particularly effective when the heat source is an infrared lamp, since the heat rays also heat the shield plate to a high temperature.

FIG. 3 shows a second embodiment of the present invention, and in the figure, parts corresponding to those in FIG. 1 are designated by the same reference numerals.

In this embodiment, the shielding plate Oυ is formed with an opening 84 that is equal to the outer shape of the far-infrared radiator (8), and the shielding plate (31) is controlled by the control voltage of the controller (2) that receives the output of the thermometer (9). It can be moved left or right as shown by the arrow. When the heating temperature is higher than the desired heating temperature, it is moved in the opposite direction, ie, towards the shielding position.

By controlling the radiation intensity of the far-infrared radiator (3) together with the movement of the shielding plate Gυ, stable control with extremely good responsiveness can be obtained.

Furthermore, in the embodiments shown in FIGS. 3 and 4, the control output of the controller (2) is supplied to the far-infrared radiator (8), and a constant voltage is applied to these, and only the shielding plate (r31) is moved. The heating temperature of the material may be controlled by

Although each embodiment of the present invention has been described above, the present invention is of course not limited to these and various modifications can be made based on the technical idea of the present invention.

For example, in the first embodiment, only the far infrared rays from the two downstream far infrared radiators (3) are shielded, but of course the far infrared rays from all the far infrared radiators (8) are shielded. You may also do so. Further, although a plurality of far-infrared radiators (8) are provided, it is of course possible to use only one, and it is also possible to completely or partially block future far-infrared rays. - Also, in the above embodiments, a far-infrared radiator was explained as a heat source, but various heat sources can be applied depending on the material to be heated.

′? ! In the above embodiments, a motor was used to move the shielding plate αO, but the driving means is not limited to this; for example, an air cylinder may be used.
The structure of the danger shielding plate is not plate-like, but may be flexible like a door shutter and can be taken in and out of the storage case.

Furthermore, although a steel belt conveyor has been described as a material transfer means, any general transfer means can be applied. For example, it may be a vibrating conveyor.

As described above, according to the heating drying apparatus of the present invention, the radiation shielding means is movable between the heat source and the transfer path of the material transfer means so as to at least partially shield the radiation from the heat source. and moving the radiation shielding means between or between the heat source and the transfer path of the material transfer means based on the detection force of the temperature detection means to determine the heating temperature of the material. Therefore, the heating temperature of the transferred material can be immediately adjusted to a desired temperature, and in particular, overheating can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view of a heating drying apparatus according to a first embodiment of the present invention, FIG. 2 is a sectional view showing a modification of the shielding plate in FIG. 1, and FIG. 3 is a second embodiment of the present invention. FIG. 4 is a schematic side view of the heating drying device, and FIG. 4 is a sectional view taken along line N-IV in FIG. 3. In the figure, (1)・・・・・・・・・・・・・・・・・・・・・
・・Steel belt conveyor (8)・・・・・・・・・・
・・・・・・−・・・・・・・・・ Far infrared radiator (
9)・・・・・・・・・・・・・・・・・・・・・
・Radiation thermometer α0(1)01)・・・・・・・・・・・・
・・・・・・Shielding plate country・・・・・・・・・・・・・・・・
・・・・・・・・・Opening agent − Yasuo Iisaka

Claims (1)

[Claims] A heating dryer comprising a material transfer means, a heat source disposed above the transfer path of the means, and a temperature detection means for measuring the heating temperature of the material near the material discharge end of the material transfer means. In the apparatus, a movable radiation shielding means is disposed between the heat source and a transfer path of the material transfer means so as to at least partially shield radiation from the heat source, and The heating temperature of the material is adjusted by moving the radiation shielding means between or between the heat source and the transfer path of the material transfer means based on the detected power. A heating drying device.