GB2078803A

GB2078803A - Textile wet treatment apparatus

Info

Publication number: GB2078803A
Application number: GB8109490A
Authority: GB
Original assignee: H Krantz GmbH and Co
Current assignee: H Krantz GmbH and Co
Priority date: 1980-06-21
Filing date: 1981-03-26
Publication date: 1982-01-13
Also published as: IT1137453B; IT8121044A0; ES8202076A1; GB2078803B; CH650294A5; JPS5729655A; ES501071A0; DE3023222A1

Abstract

Container 1 includes cylindrical upright part 4 to the lower end of which connects a horizontal part 3 merging with an inclined cylindrical part 2 with the remote end of which connects a tube 9 leading from a mouth 8 below the take-off side of a drive roller 6 in the upper portion of the upright part 4. Annular tubes 14 of a heat exchanger are located in a downward extension 13 of the container part 4. Strand-form textile material 24 for treatment passes over the roller 6 and is entrained into the mouth 8 by way of liquor, supplied through nozzle head 21 from outlet of pump 19, impinging thereon. From the tube 9, the material enters the casing part 2, which contains liquor at a level, between the limits 22 and 23, selected in accordance with the material and its desired treatment whence it passes into a perforate insert 25 in the horizontal part 3 and thence up the upright part 4 back to the roller 6. <IMAGE>

Description

SPECIFICATION Wet treatment apparatus This invention relates to wet treatment apparatus, more especially for dyeing strand-form textile material, comprising a cylindrical container which is partially flooded with treatment liquor, and which includes a container part which is inclined relative to the horizontal and which merges into a horizontal container part to which a vertical container part is connected, there being arranged in the upper portion, which is designed to be of dome-like configuration, of the vertical container part, a roller or winch under which is disposed a mouth, in which is arranged a ring nozzle head, of a tube leading to the free end of the inclined container part, the ring nozzle head being supplied, by way of a line which is connected to the pressure side of a pump, with treatment liquor which is drawn from the container by way of a line which is connected to the suction side of the pump.

Such apparatus is known from German Gebrauchsmuster No. 76 32 613 and makes it possible to adapt the amount of treatment liquor to the amount of the textile material that is to be treated, so that when only small batches are to be treated the amount of liquor can be reduced accordingly, and the obtention of a favourable liquor/material ratio is not restricted only to large batches.

A considerable disadvantage of the known apparatus lies in the fact that the liquor has to be heated up by means of a heat exchanger arranged outside the container, before the relevant proportion of the treatment liquor is supplied afresh to the ring nozzle head. The use of an external heat store not only requires additional stretches of pipeline which make maintenance of precise temperatures very difficult and impair constancy of temperature within the liquor, but also makes the apparatus more expensive in that long stretches of such pipeline are necessary, and the sheathing of the heat exchanger has to have a higher resistance to pressure than the container parts.

The task underlying the invention is to improve a wet treatment apparatus, of the kind described at the beginning hereof, in such a way that use can be made for the heating-up and return of the heated liquor to the ring nozzle head, of an integrated heat exchanger having the shortest possible stretches of pipeline, without the integration of the heat exchanger hindering the circulation of the strand-form textile material.

Starting from the apparatus as described at the beginning thereof, to solve the problem posed, it is proposed, in accordance with the invention, that the vertical container part should have an extension which lies lower than the horizontal container part and in which ring lines of a heat exchanger are accommodated and to which the line leading to the suction side of the pump is connected.

As a result of the provision of the extension, in the arrangement in accordance with the invention, of the vertical container part, one obtains an optimum possibility of accommodating the heat exchanger within the container, not impairing the strand circulation in any way, so that not only are feed lines to the heat exchanger abolished, but the heat exchanger requires no sheathing able to resist, with appropriate certainty, the pressure conditions to be expected in the container. The connection of the pump suction line to the extension, in the arrangement in accordance with the invention, ensures that even in the case of a low liquor level the pump always has enough liquor available to avoid cavitation.

A development of the invention provides for the provision, in the extension part, concentrically to the ring lines, of a guide body which forms an annular chamber with the side wall of the extension part.

The guide body in the arrangement in accordance with the invention ensures that the portion of liquor to be drawn off passes by way of the cross-section of the annular chamber, in uniform contact with the ring lines of the heat exchanger, whereby an excellent uniformity of temperature is ensured within the drawn-off portion of the liquor.

A further development of the invention provides for there to be arranged, in the horizontal container part, a cylindrical insert which is provided with perforations and which extends, by a portion thereof which is spoon-shaped in configuration, into the vertical container part and masks the extension.

This cylindrical insert ensures that the textile material, which is conducted in loops through the horizontal container part as sojourn zone, is prevented from following the liquor flow in the direction of the heat exchanger, but is kept by the perforated cylindrical insert in the sojourn zone until the strand loops have, as a result of the horizontal flow component, reached the spoonshaped end of the insert, so that they may be drawn up from there, with the aid of the roller or winch, in order to pass afresh into the ring nozzle head, which progresses the strand continuously with the aid of the uniformly-heated liquor part by way of the pipeline to the free end of the inclined container part.

Finally, a development of the invention additionally provides for the possibility of several of the containers being arranged in parallel and side-by-side, and being connected to the suction side of a common pump and/or having a common drive for the rollers or winches in the domeshaped upper portions thereof.

With such a parallel arrangement of containers, it is possible to provide a particularly economical wet treatment apparatus, of substantial capacity, which can be operated very flexibly and particularly economically, for the treatment of batches of different sizes.

The invention will be described further, by way of example, with reference to the accompanying drawings, in which: Fig. 1 is a diagrammatic cross-sectional side elevation illustrating a preferred embodiment of the apparatus of the invention, the section corresponding to the line I-I of Fig. 2; and Fig. 2 is a diagrammatic front view of the apparatus, which comprises two containers arranged parallel and side-by-side.

The wet treatment apparatus of the invention comprises at least one container 1, which is composed of various and differently-arranged container parts, including a cylindrical container part 2 which is inclined relative to the horizontal and merges into a cylindrical horizontal container part 3, to which a vertical container part 4 is connected at right angles. In a dome-shaped upper part 5 of the vertical container part 4 is a roller 7 driven by way of a horizontally-mounted shaft 6. Arranged at the take-off side, underneath the roller 7, is mouth 8 of a tube 9 whose end 10, remote from the mouth, 8 is connected, by way of an elbow 11, to a conically-widening intermediate piece 12, which is connected to the inclined cylindrical container part 2.

Connected to the vertical container part 4 is a downwardly-pointing extension part 13 which extends approximately by half its diameter downwardly beyond the horizontal container part 3 in drop-shaped manner.

Ring lines 14 of a heat exchanger are so arranged in the extension part 13 that an annular chamber 16 is formed between a guide body 15, arranged concentrically inside the ring lines, and the side wall of the extension part in which annular chamber 1 6 the ring lines 14 are arranged in a uniform distribution.

Flange-mounted on the lower end of the extension part 13 is a pipe socket 17 which is connected to a suction line 18 of a pump 19. A line 20, shown partially only schematically, leads from the pressure side of the pump 12 to a ring nozzle head 21 which is arranged in the mouth 8 of the tube 9.

The container 1 is partially flooded to a specific level with treatment liquor. This level can be set between the two levels indicated at 22 and 23, respectively, depending on the amount of textile material that is to be treated.

The textile material to be treated is supplied in the form of a strand 24 by way of the roller 7 to the ring nozzle head 21 and is progressed, with the aid of the liquor flow, by way of the tube 9, which is preferably inclined relative to the horizontal slightly in the flow direction, into the container part 2. In loop form, the textile strand 24 slides through the container part 2 and passes into a perforate cylindrical insert 25 in the horizontal container part 3. The liquor flow causes further transportation of the loops of the textile strand 24 as far as an end 26, of spoon-shaped configuration, of the perforate insert 25, which extends into the vertical container part 4 and is located above the extension part 13.From the spoon-shaped end piece 26 of the perforate insert 25, the strand 24 is conveyed upwards, with the aid of the driven roller 7, in order to run afresh, by way of the nozzle head 21 , through the treatment and sojourn stretch as provided by the tube 9 and container part 2.

An opening, closed by a lid 27, at the front in the vertical container part 4, enables the nozzle head 21 to be exchanged with relatively little manual effort so that an appropriately inclined nozzle head 21 can be installed according to the nature of the textile material being treated.

As shown in Fig. 2, two of the containers 1 can be arranged parallel to one another and combined to form a single wet treatment apparatus in which liquor circulation for both containers is achieved with only one pump 19 of which the line 20, connected on the pressure side, opens into an appropriate T-piece for supplying the liquor to the two nozzle heads 21.

The advantages achievable with the wet treatment apparatus in accordance with the invention can be summed up as follows: The treatment-liquor level can be varied within wide limits between a minimum and a maximum.

so that work can be effected not only with small liquor quantities but can also be effected with exactly-determined liquor ratios depending on the material being treated. Different liquor impingement through the nozzle head 21, adapted in accordance with the textile material being treated, can be obtained by simple exchange of the nozzle head, e.g. with another which is similar in its outer peripheral configuration. The exhaust zone of the apparatus is arranged directly at the front end of the sojourn stretch in which the perforate insert 25 is retained, without the need for any special retainers, simply by being positioned in the horizontal container part 3. In this way the need for special construction parts, obligatory for reasons of safety are abolished. The eccentric arrangement, arising from the differences in diameter, yields a favourable flow cross-section.The accommodation of the ring line 14 of the heat exchanger in the container part 13 spares the need for special pipelines leading to the heat exchanger and for heat-exchanger sheathing which, in the known apparatus, is necessary for safety reasons and involves considerable expenditure on material. The liquor to be drawn off is tapped at the lowest point, so that at all times sufficient liquor is available in the circulating pump 19 to preclude cavitation. The integrated heat exchanger makes possible, furthermore, location of the pump 21 with only a short line 18 on the suction side and thus as a whole a short connection stretch to the nozzle head 21. Short liquor paths and a low expenditure on pipelines reduces the liquor portion not in direct contact with the textile material and favours furthermore a treatment involving only very small liquor quantities.

The above described advantages contribute to a particularly uniform temperature distribution over the entire circulation stretch of the textile strand 24.

Claims

1. Wet treatment apparatus, more especially for dyeing strand-form textile material, comprising a cylindrical container which is partially flooded with treatment liquor, and which includes a container part which is inclined relative to the horizontal and which merges into a horizontal container part to which a vertical container part is connected, there being arranged in the upper portion, which is designed to be of dome-like configuration, of the vertical container part, a roller or winch under which is disposed a mouth, in which is arranged a ring nozzle head, of a tube leading to the free end of the inclined container part, the ring nozzle head being supplied, by way of a line which is connected to the pressure side of the pump, with treatment liquor which can be drawn from the container by way of a line which is connected to the suction side of the pump, characterised in that the vertical container part has an extension which lies lower than the horizontal container part and in which ring lines of a heat exchanger are accommodated and to which the line leading to the suction side of the pump is connected.

2. Apparatus as claimed in claim 1, characterised by the provision, in the extension part, concentrically to the ring lines a guide body which forms an annular chamber with the side wall of the extension part.

3. Apparatus as claimed in claim 1 or 2, characterised in that in the horizontal container part there is a cylindrical insert which is provided with perforations and which extends, by a portion thereof which is spoon-shaped in configuration, into the vertical container part and masks the extension.

4. Apparatus as claimed in claim 1, 2 or 3, characterised in that it comprises several of the containers arranged side-by-side and connected to the suction side of a common pump and/or have a common drive for the rollers or winches in the dome-shaped upper portions thereof.

5. Wet treatment apparatus, more especially for dyeing strand-form textile material, substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.