EP1705281A1 - Device and method for impregnating fabrics in a treatment liquid, in particular for treatments in liquid ammonia - Google Patents

Device and method for impregnating fabrics in a treatment liquid, in particular for treatments in liquid ammonia Download PDF

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Publication number
EP1705281A1
EP1705281A1 EP06111484A EP06111484A EP1705281A1 EP 1705281 A1 EP1705281 A1 EP 1705281A1 EP 06111484 A EP06111484 A EP 06111484A EP 06111484 A EP06111484 A EP 06111484A EP 1705281 A1 EP1705281 A1 EP 1705281A1
Authority
EP
European Patent Office
Prior art keywords
tank
fabric
impregnation
sections
treatment liquid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP06111484A
Other languages
German (de)
English (en)
French (fr)
Inventor
Bruno Scortegagna
Antonio Panozzo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LAFIN Srl
Original Assignee
LAFIN Srl
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LAFIN Srl filed Critical LAFIN Srl
Publication of EP1705281A1 publication Critical patent/EP1705281A1/en
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
    • D06B7/00—Mercerising, e.g. lustring by mercerising
    • D06B7/08—Mercerising, e.g. lustring by mercerising of fabrics of indefinite length
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
    • D06B23/00—Component parts, details, or accessories of apparatus or machines, specially adapted for the treating of textile materials, not restricted to a particular kind of apparatus, provided for in groups D06B1/00 - D06B21/00
    • D06B23/14—Containers, e.g. vats

Definitions

  • the present invention concerns a device and the relative method for impregnating fabrics in a treatment liquid.
  • the invention is applied advantageously, although not exclusively, in the continuous treatment of fabrics in anhydrous liquid ammonia (NH 3 ), in which the impregnation of the fabric is performed by passing it in a tank filled at least partly with liquid ammonia.
  • NH 3 anhydrous liquid ammonia
  • this treatment is carried out continuously, making the fabric to be treated pass inside a tank containing liquid ammonia, and then sending it in sequence first to a section where a chemical reaction with the ammonia takes place, and then to a section to remove the ammonia from the fabric, performed by means of heating and/or washing in a bath of water.
  • Another disadvantage of known devices is the difficulty of carrying out maintenance and cleaning operations on the impregnation tank, and also the complexity and consequent slowness of the operations to empty the tank of the residual ammonia at the end of or during a pause in the treatment.
  • Another disadvantage of known devices is that caused by the difficulty of guaranteeing that the level of liquid ammonia is maintained substantially constant, and/or at a programmed value, during and after the passage of the fabric, and of ensuring a correct restoration of the quantity of liquid ammonia removed by the fabric during its passage.
  • Purpose of the invention is to overcome the disadvantages of the state of the art mentioned above, supplying a device for impregnating fabrics in a treatment liquid wherein the impregnation time can be regulated at least according to the fabric to be treated.
  • Another purpose is to supply a device for impregnating fabrics wherein the operations to maintain and empty the tank are facilitated, and to restore the level of liquid to a desired value.
  • the Applicant has devised and embodied the present invention to overcome the shortcomings of the state of the art and to obtain other advantages.
  • the device for impregnating fabrics in a treatment liquid comprises a tank consisting of at least two sections communicating with each other, which are disposed, in the normal position of use of the tank, on different levels progressively decreasing in the direction of feed of the fabric.
  • the two or more sections of the tank are separated from each other by dividing elements, the height of which defines for each section the maximum filling level before the liquid overflows into the adjacent section, located at a lower level.
  • the various sections of the tank can be filled with the treatment liquid, for example liquid ammonia, using a single feed mean communicating with the first section encountered by the fabric, that is, the one located at the highest level, and then progressively filling, by overflow, the other sections too.
  • the treatment liquid for example liquid ammonia
  • an impregnation cylinder is associated with each of the sections of the tank, around which the fabric is made to pass at least for the segment it is immersed in the tank.
  • Each impregnation cylinder in the normal condition of use, is at least partly immersed in the relative section of the tank.
  • each cylinder in order to regulate the impregnation times of the fabric in the treatment liquid, is equipped with an autonomous lifting/lowering movement with respect to the relative section of the tank, so as to be able to be completely removed therefrom when it is desired that the fabric in transit is not immersed in one or more of the relative sections.
  • one or more of the sections of the tank are kept empty, while at least one of the others is filled with the treatment liquid; in this way, the impregnation of the fabric can be limited as desired with respect to a situation wherein all the sections of the tank are filled with the liquid.
  • the tank can be inclined or oriented during the passage of the fabric, so as to put the treatment liquid present in one or more of its sections out of contact with the relative impregnation cylinder.
  • the tank is pivoted on one side in order to allow it to be easily removed, for example for replacement or maintenance or cleaning.
  • the device comprises at least a container suitable to restore, even during use, the level of liquid ammonia present in the impregnation tank.
  • the container is connected to the impregnation tank by means of a hydraulic circuit comprising at least a pump and valve means.
  • the tank also cooperates with at least a level sensor suitable to send measurement signals to a control unit, which is suitable to selectively activate the pump when it becomes necessary to restore a desired level of ammonia inside the tank.
  • the container is connected to the individual sections of the tank by means of discharge valves that allow to discharge the relative residual liquid inside the container and/or towards abatement and restoration means, so as to allow the possibility of a substantially continuous re-circulation between the tank and the container.
  • the tank can be filled by delivery only in the section of the tank located at the top, that is, the first encountered by the fabric, and the other sections can be filled by means of a progressive overflow from one section to the other.
  • the hydraulic circuit associated with the container is ramified, and the pump is connected by means of a relative branch of the circuit to every section of the tank, which in turn has its own delivery mean which allows it to be filled independently.
  • the device comprises a circuit to heat the impregnation tank and/or the space between the tank and the container.
  • the heating circuit which can run on diathermic oil or other suitable type, can be selectively activated so as to facilitate the evaporation of the residual ammonia at least in the step of emptying and discharging the ammonia from the tank.
  • the reference number 10 denotes in its entirety a device for impregnating a fabric 11 in a treatment liquid 19, which for example can be anhydrous liquid ammonia (NH 3 ).
  • a treatment liquid 19 which for example can be anhydrous liquid ammonia (NH 3 ).
  • the invention is however applicable for the treatment of fabrics in any other type of liquid.
  • the device 10 comprises at least a tank 12 configured so as to include a plurality of sections, respectively first 112a, second 112b, and third 112c, all contiguous and communicating with each other, separated by dividing elements 13b, 13c which define, at least for the first 112a and the second section 112b, the relative maximum filling level.
  • Two walls respectively inlet 13a and outlet 13d, define the perimeter edges of inlet and outlet of the tank 12.
  • the tank 12 can include only two, or four or more contiguous sections.
  • the fabric 11 is accompanied inside the tank 12 by means of an introduction cylinder 14, two drawing cylinders 16 and a plurality of impregnation cylinders, respectively 15a, 15b and 15c, one for each section of the tank 12. There is also a guide cylinder 17 between two adjacent impregnation cylinders 15.
  • the impregnation cylinders 15a, 15b, 15c advantageously include a knurled, studded or micro-threaded surface, or with another light surface impression, in order to promote the impregnation with the treatment liquid of the face of the fabric 11 in contact with the cylinder.
  • squeezing cylinders 18 In cooperation with the drawing cylinders 16 there are also squeezing cylinders 18, mobile radially in the direction of the arrows F with respect to the drawing cylinders 16.
  • the function of the squeezing cylinders 18 is to exert an adjustable squeezing action on the fabric 11 emerging from a relative section of the tank 12 in order to dose, on each occasion, the quantity of treatment liquid 19 which remains on the fabric 11 at exit from the tank 12.
  • the device 10 is suitable to use only one, or only some of the sections 112a, 112b, 112c of the tank 12, in order to regulate the impregnation times, for example according to the type of fabric 11 being treated, or the desired result.
  • This partial use of the tank 12 can be obtained in several ways.
  • one or more of the impregnation cylinders 15a, 15b, 15c can be raised during the passage of the fabric 11 until they are completely removed from the treatment liquid 19 present in the relative section 112a, 112b, 112c, so that the fabric 11 can transit freely without contacting the liquid and hence without being impregnated therewith.
  • one or more sections 112a, 112b, 112c can be emptied of the treatment liquid 19, while one or more of the others are kept full.
  • the tank 12 can be pivoted at a point 21 (fig. 3) at one end, and be inclined, during the passage of the fabric 11, until the level of treatment liquid 19 of one section, in this case the last 112c, is no longer in contact with the relative impregnation cylinder 15c.
  • a tank 12 pivoted at one point 21, and able to oscillate with respect thereto facilitates its rapid detachment in order to carry out operations of repairs and maintenance on the tank 12 or on parts of it.
  • the tank 12 is connected, by means of a hydraulic feed circuit, to a container 22, by means of which, through pump means 23, it is possible to feed the treatment liquid 19 to the tank 12, and possibly make it re-circulate.
  • the container 22 has its own filling mean 30, and a connection pipe 31 to a condenser in order to liquefy the vapors of the liquid, for example ammonia, that are generated inside it during the discharge step.
  • the tank 12 can be filled by means of the pump 23, by delivering the liquid only to the first section 112a of the tank 12, by means of a first distributor element 24a, while the other sections 112b and 112c are filled by overflow of the treatment liquid 19 from the first section 112a.
  • interception valves 25a, 25b, 25c and 25d present, which are selectively opened during the filling step.
  • all three sections 112a, 112b, 112c of the tank 12 can be filled directly from the container 22, by means of a branch of the hydraulic circuit and respective introduction elements, respectively second 24b and third 24c.
  • interception valves 25e and 25f which are selectively opened/closed when it is desired to perform a direct feed from the container 22 to these sections, excluding that or those further upstream.
  • each section 112a, 112b, 112c there are also discharge means, for example apertures associated with stoppers that can be selectively opened, also automatically, so as to discharge upon command the relative treatment liquid 19, by opening relative discharge valves 26a, 26b, 26c.
  • discharge means for example apertures associated with stoppers that can be selectively opened, also automatically, so as to discharge upon command the relative treatment liquid 19, by opening relative discharge valves 26a, 26b, 26c.
  • the selective discharge of one or more of the sections 112a, 112b, 112c can be activated when it is desired to regulate the impregnation time of the fabric 11, emptying one or more of the sections and leaving the tank 12 only partly full.
  • the liquid discharged from the tank 12 by means of the valve 26d can be sent, by opening an interception valve 29a, to the container 22 in order to re-circulate it, or, when re-circulation is no longer possible, to an abatement tank, by opening an interception valve 29b. From the same container 22 the liquid can be sent to an abatement tower by means of the connection pipe 31.
  • Two level sensors are associated with the container 22, respectively a minimum level sensor 27a and a maximum level sensor 27b, and another level sensor 27c, a safety sensor, is associated with the tank 12.
  • the device 10 also comprises a heating circuit comprising a container 32 of heating fluid, for example diathermic oil, selectively activated pump means 33, an exchanger and selectively opening interception valves 34.
  • the heating circuit is activated to promote and accelerate the evaporation of the treatment liquid, for example ammonia, at least in the steps when the plant is stopped, for example between one work cycle and the next.
  • a load cell is mounted, not shown here, the function of which is to detect the value of shrinkage of the fabric 11 during the impregnation step with the treatment liquid, in order, for example, to regulate the drawing tension exerted by the two drawing cylinders 16.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
EP06111484A 2005-03-24 2006-03-21 Device and method for impregnating fabrics in a treatment liquid, in particular for treatments in liquid ammonia Withdrawn EP1705281A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITUD20050044 ITUD20050044A1 (it) 2005-03-24 2005-03-24 Dispositivo e procedimento di impregnazione di tessuti in un liquido di trattamento, in particolare per trattamenti in ammoniaca liquida

Publications (1)

Publication Number Publication Date
EP1705281A1 true EP1705281A1 (en) 2006-09-27

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP06111484A Withdrawn EP1705281A1 (en) 2005-03-24 2006-03-21 Device and method for impregnating fabrics in a treatment liquid, in particular for treatments in liquid ammonia

Country Status (2)

Country Link
EP (1) EP1705281A1 (it)
IT (1) ITUD20050044A1 (it)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016137467A1 (en) * 2015-02-26 2016-09-01 General Electric Company Apparatus and method for roll-to-roll membrane manufacture
CN107034608A (zh) * 2016-11-16 2017-08-11 盛江 一种电池片生产试压用纤维布高效浸渍设备
CN112359535A (zh) * 2020-11-10 2021-02-12 宜昌湖蓝科技开发有限公司 一种纺织印染退浆废液处理设备及其回收利用方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB662900A (en) * 1948-09-02 1951-12-12 American Viscose Corp Method and apparatus for the liquid treatment of running materials
US3484915A (en) * 1968-05-13 1969-12-23 Ira L Griffin & Sons Inc Size box with variable size level
US3955386A (en) * 1971-03-16 1976-05-11 Artos Gesellschaft Fur Industrielle Forschung Und Entwicklung C.A. Meier-Windhorst Apparatus for the continuous liquid treatment of running lengths of materials
US4145898A (en) * 1976-10-13 1979-03-27 Air Industrie Installation for the treatment of a fabric impregnated with a liquefied gas
US5791165A (en) * 1994-08-16 1998-08-11 Eduard Kusters Maschinenfabrik Gmbh & Co. Kg Small textile-finishing installation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB662900A (en) * 1948-09-02 1951-12-12 American Viscose Corp Method and apparatus for the liquid treatment of running materials
US3484915A (en) * 1968-05-13 1969-12-23 Ira L Griffin & Sons Inc Size box with variable size level
US3955386A (en) * 1971-03-16 1976-05-11 Artos Gesellschaft Fur Industrielle Forschung Und Entwicklung C.A. Meier-Windhorst Apparatus for the continuous liquid treatment of running lengths of materials
US4145898A (en) * 1976-10-13 1979-03-27 Air Industrie Installation for the treatment of a fabric impregnated with a liquefied gas
US5791165A (en) * 1994-08-16 1998-08-11 Eduard Kusters Maschinenfabrik Gmbh & Co. Kg Small textile-finishing installation

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016137467A1 (en) * 2015-02-26 2016-09-01 General Electric Company Apparatus and method for roll-to-roll membrane manufacture
CN107034608A (zh) * 2016-11-16 2017-08-11 盛江 一种电池片生产试压用纤维布高效浸渍设备
CN107034608B (zh) * 2016-11-16 2019-05-17 江苏华恒新能源有限公司 一种电池片生产试压用纤维布高效浸渍设备
CN112359535A (zh) * 2020-11-10 2021-02-12 宜昌湖蓝科技开发有限公司 一种纺织印染退浆废液处理设备及其回收利用方法
CN112359535B (zh) * 2020-11-10 2021-12-10 东莞市晶彩纺织制衣洗水有限公司 一种纺织印染退浆废液处理设备及其回收利用方法

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Publication number Publication date
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