JPS61174464A - Apparatus for heat treatment of fabric - 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] (Industrial Application Field) This invention relates to a fabric heat treatment apparatus, and includes a tenter for heat-setting a long fabric while transporting it in a spread state, and a tenter for heat-setting a long fabric while transporting it in a spread state, and Used as baking machine for processing.

(Prior art) Fabric heat treatment equipment, such as a heat setting tenter, is a fabric heat treatment tenter in which a plurality of unit chambers formed in a rectangular tube shape with a length of 2 to 4 m are connected in the length direction. A chamber is formed, and a pair of left and right tenter rails is provided in this chamber, and a long fabric is held and transferred in a spread shape by a pair of left and right tenter chains that run along the tenter rails, and a long fabric is transferred to each of the above unit chambers. It is known that the fabric is heated by circulating hot air between each cycle and blowing the hot air onto both the upper and lower surfaces of the fabric.

Conventionally, the oil and fat contained in the fabric used when sizing the warp threads evaporates in the unit chamber and contaminates the circulating hot air, causing tar to fall on the fabric as its concentration increases. In order to prevent this, a portion of the circulating hot air is discharged from each unit chamber, while fresh outside air is sucked into each unit chamber to control the oil and fat concentration in the circulating hot air to below a certain limit.

(Problems to be Solved by the Invention) Conventional hot air treatment devices for fabrics discharge part of the circulating hot air as it is, and take in fresh outside air commensurate with the volume of the exhausted air into the unit chambers. Displacement when the length is about 3m is 5 to 20 rn”/+*
The thermal energy loss was large.

In order to reduce the above-mentioned loss, the circulating hot air taken out from each unit chamber is collected in a duct, and this circulating hot air is heated to 200 to 500°C to produce precious metals such as Pd, Ag, Cu, Mn, etc. An attempt was made to purify the oil and fat in the circulating hot air by passing it through a base metal catalyst layer made of oxides such as Ni and Co%Fa, and then return it to each unit chamber for reuse. However, in this case, a circulation duct equipped with a purification device was installed outside the unit chamber, so the temperature of the hot air passing through this circulation duct decreased due to heat radiation from the circulation duct, and the corresponding thermal energy was saved. In order to reduce this heat dissipation, the outer circumference of the above-mentioned circulation duct must be covered with a heat insulating material, which raises the problem of high equipment costs and an increase in the space of the entire heat treatment equipment. was there.

(Means for Solving the Problem) In a fabric heat treatment apparatus, hot air circulated within the chamber is blown onto both upper and lower surfaces of a long fabric that is transported in a spread state within the chamber. A burner for heating the above-mentioned circulating hot air and a catalyst layer for oxidizing and decomposing oil and fat in the circulating hot air are installed in the hot air circulation passage in the chamber in order along the flow direction of the circulating hot air. Connect an exhaust duct to exhaust part of the air and an intake duct to take in outside air.

(Function) The hot air circulating in the chamber is blown onto both the upper and lower surfaces of the fabric to heat the fabric, as in the conventional case, and the lost thermal energy is replenished by this heating, and the hot air is circulated in the chamber. However, a part of the oil is heated by a burner to a high temperature higher than the processing temperature of the fabric and touches the catalyst layer, and at that time, a part of the oil and fat contained in the circulating hot air is oxidized and decomposed, and as a result, the above circulating hot air be purified. Then, the oxygen necessary for the above-mentioned oxidative decomposition is supplied by fresh outside air taken in from the intake duct, and an amount of hot air commensurate with this outside air is exhausted from the exhaust duct.

(Example) In FIG. 2, a heat treatment chamber 1 is formed by connecting a plurality of unit chambers 2 in the length direction, and a pair of left and right tenter rails 3 are passed through the series of unit chambers 2. .3 (see Figure 1), and a fabric F is held in a spread shape between tenter chains 4.4 running along these tenter rails 3.3, and this fabric F is spread from left to right in Figure 2. It is set to be transferred. As shown in FIG. 1, the unit chamber 2 is partitioned into two upper and lower chambers 2a and 2b by a horizontal partition plate 5, leaving the left and right sides, and the tenter rail 3.3 is provided in the lower chamber 2b. ing. A fork-shaped wind barrel 6 is provided in this lower chamber 2b so as to sandwich the fabric F above and below, and the unit chamber 2
Hot air is circulated in the direction of the arrow by a motor 7 and fan 8 for hot air circulation fixed at the front and rear of one side wall of the fabric F, and the hot air is blown onto the top and bottom of the fabric F from the air outlet 6a of the wind cylinder 6, and then The hot air passes through the filter 9 installed between the horizontal partition plate 5 and the other side wall into the upper chamber 2.
a, passes through this upper chamber 2a in the width direction from left to right, and is returned to the suction side of the wind M6 through the gap 10 between the horizontal partition plate 5 and the one side wall. Branch ducts 11 for exhaust are connected to the bottom plates of the plurality of unit chambers 2, and these branch ducts 11 are connected by a main exhaust duct 12 (see Fig. 2). A damper 13 is attached to the main duct 12, and a blower 14 is attached to the main duct 12.

On the other hand, an intake duct 15, a burner 16, and a catalyst layer 17 are arranged in this order in the flow direction of the circulating hot air in the upper chamber 2a above the horizontal partition plate 5 that forms part of the hot air circulation passage. In this case, the catalyst layer 17 is an upper chamber (hot air circulation passage)
It is provided so as to occupy a part of the upper part of 2a, and a damper 18 for adjusting the air volume is provided below it. In this case, the proportion of the catalyst layer 17 in the cross-sectional area of the upper chamber 2a is 5 to 20 Nrr when the length of the unit chamber 2 is 3 m.
The hot air of r/a+in is set to pass through the catalyst layer 17, and the damper 18 adjusts the pressure loss caused by the passage of the hot air at that time. Note that the burner 16 described above is
It serves both for purification by heating the hot air sent to the catalyst layer 17 and for temperature raising by reheating to compensate for the temperature drop of the circulating hot air. It is sprayed onto the fabric and its temperature drops, and after being heated by the burner 16 and passing through the catalyst layer 17, it becomes 250 to 500°C, and after passing through the damper 18, it becomes 180 to 190°C. The temperature is set to approximately 200°C. An automatic control valve 20 is interposed in the fuel supply pipe 19 of the burner 16, and an output end of a temperature controller 21 is connected to the automatic control valve 20.
The detected value of the thermometer 22 provided in the wind WJ 46 is input, and the amount of fuel gas such as city gas, natural gas, LP gas, etc. supplied to the burner 16 is adjusted according to this detected value. . In this embodiment, since the burner 16 serves both for purification and temperature raising, the structure is simple and can be manufactured at low cost.

In the embodiment shown in FIG. 3, the upper chamber (hot air circulation passage) 2a is further divided into upper and lower parts by an intermediate partition plate 30.
In the upper passage, there is an intake duct 31, a purification burner 32, a catalyst layer 33. A first thermometer 34 and a damper 35 are arranged in this order, and the temperature of the hot air that has passed through the catalyst layer 33 is measured by the first thermometer 34.
Detected by the first temperature controller 36, the first automatic control valve 3
7 and adjusts the supply amount of fuel gas flowing through the fuel supply pipe 38. A heat medium heater 39 for raising the temperature of the circulating hot air is provided below the intermediate partition plate 30, and heat is supplied to the heat medium heater 39. The medium inlet pipe 40 and the heat medium outlet pipe 41 are connected, the temperature of the hot air in the air M6 is detected by the second thermometer 42, and the flow rate of the heat medium is controlled by the second temperature controller 43 via the second automatic control valve 44. It is used to adjust the In the embodiment shown in FIG. 3, fuel costs are reduced by using heavy oil, white kerosene, or the like to heat the circulating heat medium. In addition, in this third @ embodiment, a purifying burner 3 is used instead of the heat medium heater 39.
A burner similar to 2 may also be used.

(Effects of the invention) Purification by oxidative decomposition of circulating hot air is carried out within the chamber, and only the amount of fresh outside air required for the above oxidative decomposition is required, and the amount of hot air discharged is equal to the amount of fresh air taken in. That's fine. Therefore, the loss of thermal energy is significantly reduced compared to before.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of an embodiment of the invention, FIG. 2 is a side view of the above embodiment, and FIG. 3 is a cross-sectional view of another embodiment. . 1: Chamber for heat treatment, 2: Unit chamber, 2a: Upper chamber (hot air circulation passage), 3: Tenter rail, 4: Tenter chain, 5: Horizontal partition plate, 6: Wind cylinder, 8: Fan for hot air circulation, 9 : Filter, 11.12: Exhaust duct,
15-31: Intake duct, 16.32: Burner, 17.
33: Catalyst layer, 22.34.42: Thermometer, 39: Heat medium heater, F: Fabric. Patent applicant Kyoto Kikai Co., Ltd. Agent Patent attorney Takeshi Sakano Daikichi 1) Tsukasa Ryo Figure 1 Figure 3

Claims (1)

[Scope of Claims] [1] In a fabric heat treatment apparatus, hot air circulated within the chamber is blown onto both upper and lower surfaces of a long fabric that is transported in a spread state within the chamber. A burner for heating the above-mentioned circulating hot air and a catalyst layer for oxidizing and decomposing oil and fat in the circulating hot air are installed in the hot air circulation passageway in order along the flow direction of the circulating hot air, and one of the circulating hot air is installed in the above-mentioned chamber. 1. A heat treatment apparatus for fabric, characterized in that an exhaust duct for discharging the outside air and an intake duct for taking in outside air are connected to each other. [2] The chamber is a unit chamber several meters long connected in the length direction, hot air is circulated in the width direction for each unit chamber, and a burner and a catalyst layer are provided in each hot air circulation passage. A fabric heat treatment apparatus according to claim 1. [3] The fabric heat treatment apparatus according to claim 1, wherein a part of the hot air circulation passage is partitioned into two passages parallel to the flow direction of the circulating hot air, one of which is provided with a burner and a catalyst layer. [4] The fabric heat treatment apparatus according to any one of claims 1 to 3, wherein the burner also serves to raise the temperature of the circulating hot air. [5] The fabric heat treatment apparatus according to any one of claims 1 to 4, wherein the intake duct is provided on the upstream side of the burner.