JPS6245032Y2 - - Google Patents

Description

[Detailed description of the invention] When fabrics such as woven or knitted fabrics are heated with a heat treatment machine and subjected to drying or heat setting, the heat in the exhaust air is recovered and supplied by heat exchange between the supply air and the exhaust air. Thermal efficiency has been improved by preheating the air, but in the pretreatment of the fabric to be treated, oil, glue, etc. in the treatment agent impregnated with this are heated and turned into tar, which causes the temperature of the exhaust gas to increase. When it comes into contact with the surface of a filter or heat exchanger whose temperature is lower than that of the filter, it solidifies and adheres to the surface, and fluff from fabrics adheres to it, which quickly clogs the filter and impairs the heat exchange function. In order to solve this problem, the adhesion layer must be removed frequently by washing with hot water, steam, detergent, etc., which is an inconvenience.

In view of the above, the present invention heats the surface of the heat exchanger and the filter that are in direct contact with the exhaust gas using a heating source to raise the surface temperature higher than the temperature of the exhaust gas.
It is maintained at a temperature of at least 120°C or higher to prevent the tar generated in the exhaust gas from solidifying and adhering to the air, thereby preventing a decrease in heat exchange effect and making preheating of the supply air effective by heat exchange between the supply and exhaust air. , an example of its implementation will be described with reference to the drawings.

Reference numeral 1 denotes a heat treatment machine for drying and heat setting the fabric to be treated, and this is equipped with an air supply pipe 2 and an exhaust pipe 3 for supplying and discharging the processing air of the machine 1. The air supply pipe 2 and the exhaust pipe 3 are partially adjacent to each other on the outside of the machine 1, and a heat exchanger 4 is provided across them to exchange heat between the air supply and exhaust gas flowing through both pipes 2 and 3. Thermal efficiency has been improved by recovering and using the heat from the treated exhaust gas to preheat the supply air.

The illustrated heat exchanger 4 is of a type using a heat pipe, and an intermediate partition plate 4b is provided inside the housing 4a.
It is divided into an air supply side and an exhaust side, and each is connected to the air supply pipe 2.
and the exhaust pipe 3, and a large number of finned heat pipes 4c are provided in the housing 4a through the partition plate 4b.
The heat pipe 4c in contact with the exhaust air on the exhaust side transfers the exhaust heat to the air supply side to preheat the air supply. A heat exchange device may be employed.

In the drawings, reference numeral 5 indicates a heat-resistant filter made of glass fiber or the like provided on the front surface of the heat exchanger 4 on the exhaust side.

The present invention is characterized in that the heat exchanger 4 having the above structure is heated by the heat source 6 so as to maintain the surface temperature of the exhaust side and the filter 5, which are in direct contact with the exhaust gas, at at least 120° C. or higher.

As the heating source 6, as shown in the illustrated embodiment, the exhaust communication side of the heat exchanger 4 and the filter 5 are placed in a chamber 6 equipped with a suitable heater 6a, and heat exchange is performed at the temperature inside the chamber 6. Any heating means may be used, such as heating the vessel 4 and the filter 5, direct radiant heat using an electric heater or other heater, or irradiation with infrared rays.

Thus, according to the present invention, by heating the exhaust communication side of the heat exchanger 4 as well as the surface of the filter 5 that comes into contact with the exhaust gas to at least 120°C or higher, the tar in the exhaust gas can be removed by contact with the exhaust gas. It is possible to prevent coagulation and adhesion on the surface, to omit the trouble of cleaning these adhesion materials, and to preheat the supply air by a predetermined heat exchange action without reducing the heat exchange action of these adhesion layers. It has the effect of effectively carrying out.

Incidentally, the tar component is recovered by an appropriate recovery device.

[Brief explanation of the drawing]

The drawing is a side view showing an example of the implementation of the device of the present invention. 1... Heat treatment machine, 2... Air supply pipe, 3... Exhaust pipe, 4... Heat exchanger, 5... Filter, 6...
heating source.

Claims (1)

[Scope of utility model registration request] A heat exchanger 4 is provided across the air supply pipe 2 and the exhaust pipe 3 of the heat treatment machine 1 for fabrics, and the air supply is preheated by the heat exchange action between the two pipes 2 and 3. A heat exchange device for air supply and exhaust in a heat treatment machine for fabrics, which is equipped with an appropriate heat source 6 that heats the surface of a heat exchanger 4 and a filter 5 in contact with each other to a temperature higher than the exhaust temperature.