JPH084096Y2 - Hot air circulation type enameled wire baking furnace - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention relates to an exhaust gas deodorizing device for a hot air circulation type enamel wire baking furnace using a catalyst.

(Prior Art) As a device for baking an enamel varnish on a copper wire, an aluminum wire or the like, a hot air circulation type baking furnace using a solvent in the enamel varnish as a heat source has been known.

In this baking oven, an electric wire coated with enamel varnish travels from the lower wire inlet to the upper wire outlet to remove the solvent in the enamel varnish from combustible gas such as butane supplied from the gas supply port. Heat by a burner to evaporate
The solvent vapor generated by this is burned by the catalyst, and the combustion gas is circulated by the blower.

Further, in such a hot air circulation type baking furnace, in order to prevent the odor caused by the solvent in the exhaust from being diffused into the atmosphere, an exhaust gas passage is provided at the base of the pressure reducing box, and the exhaust gas passage is provided in this exhaust gas passage. A heater, a catalyst, and a blower are sequentially arranged along the flow of 1 to completely burn combustible components in the exhaust gas, and then release the exhaust gas to the atmosphere.

(Problems to be solved by the invention) By the way, in such a conventional deodorizing device, outside air flows in through the enameled wire passage hole of the decompression box, and unburned solvent vapor or combustible pyrolysis generation in the decompression box is generated. There is a problem that the vapor of the substance is cooled and condensed, and the tar-like substance is attached to the partition plate.

There is also a drawback that heat loss occurs due to the inflow of such low temperature outside air.

Therefore, the present invention prevents the generation of these tar components,
It is an object of the present invention to provide a deodorizing device for a hot air circulation type enamel wire baking furnace with reduced heat loss.

[Structure of the Invention] (Means for Solving Problems) The deodorizing device of the hot air circulation type enameled wire baking furnace of the present invention is
An exhaust gas passage is provided at the base of the decompression box of a hot air circulation type enameled wire baking furnace having a decompression box at the furnace top where partition plates having enameled wire passage holes are arranged in multiple stages, and exhaust gas passages are provided in this exhaust gas passage. A heater, a catalyst and a blower are sequentially arranged along a flow, wherein a downstream side of the catalyst in the exhaust gas passage and an upper portion of the decompression box are connected by a pipeline, and the downstream side of the catalyst in the exhaust gas passage is provided. A flow rate control valve for adjusting the inflow amount of exhaust gas into the pipeline is provided at the connection part of the side pipeline, and a combustible component of the exhaust gas is burned by a catalyst in the exhaust gas passage to deodorize and the exhaust gas is discharged. Prevents low temperature outside air from entering by ejecting part of the gas to the top of the decompression box,
It is characterized in that generation of tar-like substances due to cooling of unburned gas in the decompression box is prevented.

(Operation) In the present invention, the exhaust gas of the hot air circulation type enameled wire baking furnace enters the exhaust gas passage and the combustible components are burned and removed by the catalyst. A part of the high-temperature exhaust gas from which the combustible components have been burned and removed is guided into the pipeline by the flow rate control valve and ejected to the upper part of the decompression box.

The high-temperature exhaust gas ejected to the upper part of the decompression box acts like an air curtain to prevent low-temperature outside air from entering the decompression box to generate tar-like substances and heat loss.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In the figure, reference numeral 1 denotes a furnace body of a hot air circulation type enamel wire baking furnace, and a decompression box 2 is provided at the top of the furnace body. The decompression box 2 is configured by arranging partition plates 4 having enameled wire passage holes 3 in multiple stages so that the enameled wire passage holes 3 are located in the enameled wire passage.

Further, an exhaust gas passage 5 is provided at the base of the furnace body 1 of the decompression box 2, and a heater 6, a catalyst 7, and a blower 8 are sequentially arranged in the exhaust gas passage 5 along the flow of the exhaust gas. There is.

A pipeline 9 is provided between the exhaust gas passage 5 on the downstream side of the catalyst and the upper portion of the decompression box 2. The exhaust gas passage 5 is connected to the pipeline 9 at a flow rate of the exhaust gas flowing into the pipeline 9. A flow control valve 10 for adjusting is provided.

In the embodiment of the present invention configured as above, the enamel varnish is applied on the conductor 11 by the coating device arranged in the lower portion of the furnace body 1, and the enamel varnish is heated in the furnace body to remove the solvent vapor. appear.

The solvent vapor makes contact with a catalyst arranged in the furnace body 1 and burns to generate combustion gas, which circulates in the furnace body 1 and serves as a heat source. This combustion gas contains a small amount of unburned solvent vapor and organic thermal decomposition products.

A part of this combustion gas is sucked by the blower 8 and discharged from the exhaust gas passage 5 through a damper (not shown), passes through the heater 6 and the catalyst 7 in order, and combustible components are burned and deodorized. Released into the atmosphere. A part of the exhaust gas deodorized at this time is blown out to the upper part of the decompression box 2 through the pipeline 9.

On the other hand, part of the combustion gas containing combustible components in the furnace body,
Although it leaks into the decompression box 2 through the enameled wire passage hole 3, the combustion gas leaked into the decompression box 2 is discharged into the atmosphere because the exhaust gas ejected from the pipeline 9 acts like an air curtain. The leakage of odor is prevented, and odor emission and heat loss are prevented.

Further, the exhaust gas ejected from the pipeline 9 also prevents the invasion of the atmosphere, and since it itself has a high temperature, the decompression box 2
The formation of tar-like substances due to condensation of organic pyrolysis products in the combustion gas is prevented therein.

[Effects of the Invention] As described above, the deodorizing device for the hot-air circulation type enameled wire baking furnace of the present invention prevents the leakage of unburned solvent and organic thermal decomposition products from the baking furnace to generate odors. It is also possible to prevent the tar-like substance from adhering to the inside of the reduced pressure box and further reduce the heat loss.

[Brief description of drawings]

The drawing is a cross-sectional view schematically showing a main part of a deodorizing device of a hot air circulation type enameled wire baking furnace used in the present invention. 1 ... Furnace body 2 ... Decompression box 3 ... Enamel wire passage hole 4 ... Partition plate 5 ... Exhaust gas passage 6 ... Heater 7 ... Catalyst 8 ... Blower 9 ... Pipeline 10 ... Flow rate adjustment Valve 11 ... conductor

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Yoshimitsu Kobamatsu 2-1-1 1-1 Oda Sakae, Kawasaki-ku, Kawasaki-shi, Kanagawa Showa Electric Wire & Cable Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. An exhaust gas passage is provided at the base of the decompression box of a hot-air circulation type enameled wire baking furnace having a decompression box in which partition plates having enameled wire passage holes are arranged in multiple stages.
A heater along the flow of exhaust gas in this exhaust gas passage,
Where the catalyst and the blower are arranged in order, the downstream side of the catalyst in the exhaust gas passage and the upper part of the decompression box are connected by a pipeline, and the pipeline is connected in the downstream side of the catalyst in the exhaust gas passage. A flow rate control valve for adjusting the amount of exhaust gas flowing into the pipeline is provided in the section, and a combustible component of the exhaust gas is burned with a catalyst in the exhaust gas passage to deodorize, and a part of the exhaust gas of the pressure reducing box A hot-air circulation type enamel wire baking furnace, characterized in that it is prevented from invading low-temperature outside air by being ejected to the upper part, and the generation of tar-like substances is prevented by cooling the unburned gas in the decompression box.