ES2206097T3 - STEAM DRYER RECALLED. - Google Patents

Abstract

The housing of a hot steam dryer, to take continuous fabric piecegoods to be blown with hot steam, has a chamber section (2) and a passage section (3). The passage section (3) extends over the whole length of the chamber section (2), or virtually its length, and over its whole height, with an entry door (29). The drives (31) are at the opposite side of the housing to the passage section (3). The drives (31) are under the base (4) of the chamber section (2). The passage section (3) extends downwards over the chamber section (2), so that the gap between the base (23) of the passage section (3) to the floor (26) is less than the gap between the chamber section (2) and the floor. The processing chambers, with recirculating air systems, can be constructed as described in DE-A 199 15 923.

Description

Reheated steam dryer.

The invention concerns a steam dryer reheated according to the preamble of claim 1.

Drying with superheated steam faces the drying with, for example, warm air, economic advantages and process that have already been described in the book "Dryer and drying procedure "by K. Kröll, Springer-Verlag 1959, page 37 and also page 177. It is also known from this book that in practice it is not very simple build reheated steam dryers for continuous operation, for example for fabric bands, with a tightness such that no air of any kind penetrates.

In a reheated steam dryer of the genre exposed, known by the document DE-A-195 46 344 or the document EP-A-0 779 486, for treatment thermal of a continuous gender band by steam blowing reheated air penetration is suppressed to a large extent because the critical sites in which, as taught by the experience, leakage currents are presented are located in the bottom of the housing and the remaining walls are fully free of perforations. In the background are also mounted access hatches. The arrangement of access hatches in the fund hinders the accessibility of the parties to maintain reheated steam dryer and therefore the work of Maintenance in this dryer. Also problematic are the openings in the bottom of the housing, and through them you can penetrate air Therefore, these openings must be sealed.

The purpose of the invention consists in set up a reheated air dryer according to the preamble of the claim 1 so that work of maintenance in the simplest way possible and at the same time avoid air penetration to a large extent.

This problem is solved by the fact that the Steam-tight housing features, in addition to the chamber sector known around the heating chambers, a sector of corridor that extends almost or in full length and at least in the entire height of the camera sector. Preferably, the sector of aisle is passable and has a corresponding height. To this Finally, the aisle sector can project upwards or towards low beyond the camera sector.

The aisle sector that extends throughout the side of the camera sector along the cameras of Treatment presents an access door. It only has to the opening for the access door is sealed, which contrasts with several openings in the bottom of the housing to access hatches.

The layout of a corridor sector makes possible, because of the best accessibility, for example to interior enclosures of the treatment chambers, a simplification of maintenance work and prevents it time to a large extent the penetration of air into the steam dryer reheated.

\hbox{DE-A-195 46 344,}

es más sencillo en el aspecto constructivo disponer los ventiladores de circulación de aire y sus accionamientos, según la reivindicación 2, en el lado del sector de cámara opuesto al sector de pasillo.In the case of an arrangement of the drives of the air circulation fans outside the housing, that is, outside the reheated steam, which is known from the document

 \ hbox {DE-A-195 46 344,} 

it is easier in the construction aspect to arrange the air circulation fans and their drives, according to claim 2, on the side of the chamber sector opposite the aisle sector.

\hbox{A-195 46 344}

el elevar la carcasa de modo que entre el fondo de la carcasa y el suelo de la nave exista una distancia determinada. Según una ejecución de la invención descrita en la reivindicación 3, el sector de pasillo se proyecta hacia abajo más allá del sector de cámara, es decir que la distancia de su fondo al suelo de la nave es menor que la del sector de cámara. El fondo del sector de pasillo puede encontrarse entonces muy poco por encima del suelo de la nave. El espacio interior del sector de pasillo resulta así de mayor altura y este sector puede ser transitado con más facilidad.It is also known by document DE-

 \ hbox {A-195 46 344} 

raising the housing so that there is a certain distance between the bottom of the housing and the floor of the ship. According to an embodiment of the invention described in claim 3, the aisle sector projects downwardly beyond the chamber sector, that is to say that the distance from its bottom to the floor of the ship is less than that of the chamber sector. The bottom of the aisle sector can then be found very little above the floor of the ship. The interior space of the aisle sector is thus of greater height and this sector can be more easily traveled.

The arrangement of the drives below the bottom of the chamber sector according to claim 4 makes possible A compact construction.

The invention is explained in more detail by making reference to an example schematically represented in the drawing. The figure shows a vertical cross section of the housing of a reheated steam dryer according to the invention.

A reheated steam dryer according to the invention for the heat treatment of a gender band Continuous 1 by superheated steam blowing features a housing heat-insulated steam-tight with a chamber 2 sector and a aisle sector 3 which, as shown in the figure, are arranged side by side across the entire width of the housing. The chamber sector 2 features an entry slit and a exit slit for gender band 1, which cannot see in the figure.

The entry slit and the exit slit they can be arranged in a bottom 4 of the chamber sector 2. As alternatively, they can be arranged in a front wall and a rear wall of the chamber sector 2.

In front of the entrance slit and behind the exit groove can be arranged locks. The locks may be constructed as described in the document DE-A-198 58 839.

The superheated steam dryer has a transport device not shown in the figure for the belt of genre 1, for example with tension chains, as described in the document
DE-A-198 58 839, or alternatively it may be constructed with a roller aisle.

Chamber sector 2 presents background 4, a roof 5, two side walls 6 and 7 and the front walls and Rear that cannot be seen in the figure. The chamber sector 2 It comprises at least one treatment chamber and commonly several, for example two or six, treatment chambers juxtaposed to Way of construction box.

In each treatment chamber it is arranged to minus an air circulation equipment, that is, a device to drive superheated steam by the circulation procedure of air, with an air circulation fan 8 and with boxes of 9 nozzles arranged above and below the gender band 1 and equipped with openings pointing towards said band of gender.

The nozzle openings of the nozzle boxes 9 they can present, for example, round perimeters and be arranged around reflux channels eventually mounted in the nozzle boxes 9. Alternatively, they may be formed also nozzle openings in the form of slits.

The air circulation equipment presents, in addition, reflux enclosures 10, 11, 12 surrounding the boxes of nozzles 9, a suction chamber 13 arranged on the side of air circulation fan aspiration 8 and equipped with a heating equipment 14, and an additional chamber 15 arranged in the drive side of the air circulation fan 8.

In the respective treatment chamber are arranged a partition 16 that separates the air inlet chamber 15 and that runs parallel to its side wall 6, and an intermediate bottom 17 separating the suction chamber 13, which runs parallel to the bottom 4 and spliced with partition 16. In the area located by below the intermediate bottom 17 the partition 16 has an opening which flows into the suction chamber 13 and with which it is connected the suction side of the air circulation fan 8 there ready. On the opposite side, in the vicinity of the wall lateral 7, the intermediate bottom 17 has an opening provided with a cleaning sieve 18. Below this opening is arranged the heating equipment 14, specifically a device for indirect heating that works with thermal oil.

The air supply chamber 13 is subdivided by a baffle plate 19 in a pressure chamber 20 and a distribution chamber 22 connected with feed openings 21 of the nozzle boxes 9.

The aisle sector 3 is arranged on the side of the side wall 7 of the chamber sector 2 and is
extends over the entire side wall 7, that is, over the entire length of the chamber sector 2 of the housing.
Its roof is formed by the ceiling 5 of the chamber sector 2, which projects beyond the side wall
7. It has a bottom 23 and two side walls 24, 25.

The bottom 4 of the chamber sector 2 is arranged some distance from the ground 26 of the ship. The aisle sector 3 it extends over the entire height of chamber sector 2 and is projected towards the ground 26 of the ship beyond chamber sector 2, it is say that the bottom 23 of the aisle sector 2 is arranged more low and, therefore, with less ground clearance 26 of the ship than bottom 4 of chamber sector 2. Thus, inside the aisle sector 3 a walkable interior enclosure is formed 27.

Therefore, the steam dryer housing reheated is formed by the common roof 5 of the chamber sector 2 and the aisle sector 3, the side wall 6 and the bottom 4 of the chamber sector 2, as well as a sector 28 of the side wall 25 of the aisle sector 3, which projects beyond the side wall 7 of chamber sector 2, bottom 23 and side wall 25 of aisle sector 3.

On its outer side wall 25 the sector of hall 3 has a sealed access door 29.

In the respective treatment chamber 2 the air circulation fan 8 is mounted on the opposite side to the aisle sector 3 near the bottom 4 and the side wall 6 of chamber sector 2, extending a tree 30 of the air circulation fan 8 through the side wall 6 and being connected to a drive 31 arranged below the background 4.

Otherwise, the treatment chambers with the air circulation devices may be constructed of the way described in the document DE-A-199 15 923.

List of reference symbols

one

 Band of gender

two

 Sector of camera

3

 Sector of Hall

4

 Background

5

 The ceiling

6

 Wall side

7

 Wall side

8

 Fan air circulation

9

 Boxes nozzles

10

Enclosure of Reflux

eleven

Enclosure of Reflux

12

Enclosure of Reflux

13

Camera of aspiration

14

Team of heating

fifteen

Camera of air supply

16

Partition

17

Background intermediate

18

Sieve of cleaning

19

Lock baffle

twenty

Camera of Pressure

twenty-one

Openings of feeding of the nozzle boxes

22

Camera of distribution

2. 3

Background

24

Wall side

25

Wall side

26

One floor ship

27

Enclosure inside

28

Wall sector lateral 25

29

Door of access

30

tree

31

Drive

Claims (4)

1. Reheated steam dryer for the heat treatment of a continuous gender band (1) by blow of superheated steam, which comprises a vapor tight housing equipped with a entry slit and exit slit, a transport device for the band gender, and at least one treatment chamber that has at minus an air circulation equipment with a fan of air circulation (8) and nozzle boxes (9) arranged by above and below the gender band and provided with openings of nozzle pointing towards the gender band, and at least one access opening, characterized because the housing has a chamber sector (2) and a aisle sector (3), extending the aisle sector (3) almost or the entire length and at least the entire height of the sector of chamber (2) of the housing and presenting an access door (29). 2. The superheated steam dryer according to claim 1, whose air circulation fans are connected through shafts with drives arranged outside the housing, characterized in that the drives (31) are mounted on the side of the housing opposite the sector of corridor (3). 3. The superheated steam dryer according to claim 2, wherein the housing chamber sector is arranged at a certain distance from the floor of a ship, characterized in that the aisle sector (3) projects downwardly beyond the sector of chamber (2), so that the distance from the bottom (23) of the aisle sector (3) to the ground (23) of the ship is less than that of the chamber sector (2). 4. The superheated steam dryer according to claim 3, characterized in that the drives (31) are arranged below the bottom (4) of the chamber sector (2).