DE8715388U1 - Device for water-saving washing of running webs - Google Patents

Description

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The innovation concerns a device for water-saving washing of running webs of material, in particular in washing processes for solution washing or the like*, in which several treatment units for the web of material are arranged in a common steam-tight housing closed except for an inlet and an outlet opening for the web of material, through which the web of material is guided over upper and lower rows of deflection rollers in essentially vertical loops.

It is known that the economic efficiency of a washing machine is determined by the amount of water in liters per kilogram of goods that is required to achieve the desired washing effect, since this amount of water causes costs as fresh water, for heating and as waste water. It is therefore important to achieve the greatest possible treatment effect by using as little fresh washing water as possible.

In the known washing devices, in which a web of fabric to be washed comes into contact with the treatment liquor only once in each treatment section, it has been found that the fresh water supplied for washing is only used to a small extent, which is not justifiable given today's water prices.

The present innovation is therefore intended in particular to

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the task is solved* to achieve a significant saving in fresh washing water through better utilization of the washing water and thus to achieve a significant saving in operating costs when washing out running webs of material. ·

To solve this problem, it is proposed in a device of the type mentioned at the beginning that the treatment units be designed as separate treatment compartments with regard to the liquor flow, through which the web of material passes one after the other, in which the treatment liquor flowing off the web of material after treatment and collected in collecting containers arranged outside the compartments is repeatedly fed in a circuit via pumps connected to the collecting containers. The collecting containers below the treatment compartments should be arranged in a cascade-like manner and connected to one another via weirs in order to guide the collected treatment liquor of the individual compartments through the treatment in countercurrent to the direction of travel of the web of material.

Further features of the device according to the invention can be found in claims 4 to 13.

The innovation will be explained in more detail below using the attached drawings. The drawings show: Fig. 1 the scheme for the treatment fleet management according to the innovation,

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Fig. 2 an embodiment of a device according to the innovation in a highly schematic representation and

Fig. 3 a number of differently designed treatment compartments.

In the fleet management diagram of Fig. 1, the web of fabric 10 is only indicated in order not to confuse the illustration. The complete course of the web of fabric through the treatment is shown in Fig. 2. In both figures, the same parts are provided with the same reference numerals.

As can be seen in Fig. 1, in the housing 11, through which the web of fabric passes during treatment, there are distribution pipes 25, 26, 27 and flat jet nozzles 28, 29, 30, 38, through which the treatment liquor is fed to the web of fabric. The liquor running off the web of fabric is drained off separately for each compartment at the bottom of each compartment 12, 13» 14 and collected in collecting containers 16, 16, 17, 18. The treatment liquor is pumped out of these containers via pumps 19, 20, 21, 22.

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each returned to the same compartment in the circuit ,

and via the distribution pipes and flat jet nozzles again the |

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Control valves in the supply lines can be adjusted as shown in Figure I. ^j

! The circulation of the treatment fleet is a guide of the

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The liquor is superimposed by the treatment in countercurrent to the direction of travel of the web of material, which is achieved by arranging the collection tanks 15, 16, 17, 18 in a cascade with overflows in such a way that the liquor is returned from the collection tanks^ in the areas of further advanced treatment to the collection tanks of the collection tanks further ahead in the treatment, i.e. against the direction of travel of the web of material through the treatment. The liquor renewal is carried out by overflow of the water quantity fed in as fresh water from collection tank to collection tank.

A sieve belt 23 is guided around the collecting tanks, through which the liquor flowing from the web is immediately freed of filterable impurities. The sieve belt is cleaned after passing through the last, lowest collecting tank by spraying it with a partial flow of the waste water from the inside using nozzles 24. No fresh water is therefore used for cleaning. The belt is cleaned shortly after the point where the largest amount of filtered-off substance is expected. The sieve belt 23 constantly rotates slowly in the direction of the liquor flow through the collecting tanks.

In Fig. 1, the heating of the cold fresh water 34 is also shown via a waste water heat recovery device with heat exchanger 35, a heating steam 36 connected to

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Reheater 37, as well as the associated valves and control devices are indicated. In addition, various options for special fleet routing behind the collection containers, such as interruption_40, bypass 39, drainage etc. can be seen, which enable optimum washing performance with minimal fresh water consumption for different operating requirements.

The embodiment of a device according to the invention in Fig. 2 shows the precise path of the web 10 through the successive washing compartments 12, 13, 14, as well as the liquor guides. The individual designations are the same as in Fig. 1.

The web of fabric 10 is introduced into the compartment 12 in the steam-tight housing 11 via a water lock 31. In the inlet area, the web of fabric is first sprayed on both sides with the dirtiest liquor using flat jets 38. This rinses off surface contamination and significantly reduces the concentration of the substances to be washed out in the fabric.

The supply of the liquor to the web of material in the individual compartments 12, 13, 14 then takes place in the manner already described in Fig. As does the circulation and countercurrent flow of the treatment liquor.

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At the end of the treatment, the web 10 leaves the housing again via a water lock 33 and can then be fed to a final washing device 41, whereby the washing treatment is then completed.

Fig. 3 shows the possible variations in the design of the washing compartments, which _can , for example, have different lengths depending on the treatment requirements in order to achieve optimum treatment effects, particularly with regard to the most economical water consumption.

The washing compartments can be designed with a single loop intake 43 or a double loop intake 44> where 43a and 44a represent an inlet compartment, 43b and 44b show an example embodiment for a middle compartment and 43c and 44c are outlet compartments.

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Claims (13)

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FRIEDRICH-EBERT-STR. IO f Postal address: Attorney Dr. W. atruok
2&Ogr;8&Ogr; FinneüertJ/ Holet Poeifaoh 2&Ogr;&THgr;7 (eO Device for water-saving washing^'/ < / y 9-Q <^ ^} , Q of -moving webs of fabric ' ~* Note: Babcock Textilmaschinen GmbH _r < ->&tgr;>2105 Seevetal 3-mesh /t OJ "'! '' Protection claims 1. Device for water-saving washing of running webs of material, in particular in washing processes for solution washing or the like, in which several treatment units for the web of material are arranged in a common steam-tight housing closed except for an inlet and an outlet opening for the web of material, through which the web of material is guided over upper and lower rows of deflection rollers in essentially vertical loops*, characterized in that the treatment units * * till tit·*
ti &igr; till · * # * * are designed as separate, possibly different, treatment compartments (12, 13, 14) through which the web of material (10) passes one after the other, in which \. the web of goods which is removed from the web after treatment treatment liquor flowing out and collected in collecting containers arranged outside the compartments (15, 16, 17) &Rgr; via pumps connected to the collecting tanks (19, 20, 21) is repeatedly fed into the circulation. 2. Device according to claim 1, characterized in that in the inlet treatment compartment (12) an additional treatment liquor circuit with flat jet nozzles (38) arranged on both sides of the web (10) for removing surface protection and for intensifying the treatment with an associated collecting container (18) and a circulation pump (22) is provided. 3. Device according to claim 1 and 2, characterized in that the collecting containers (15, 16, 17, 18) at the level below the treatment compartments (12, 13, 14) are connected to one another in a cascade-like manner via weirs for guiding the collected treatment liquor of the individual liquor circuits arranged in countercurrent to the running direction of the web (10) through the treatment. 4* Device according to claims 1 to 3*, characterized in that a circulating sieve belt (23) is placed around the collecting containers (15» 16, 17, 18), the I« III* t With Hit Ii »1 &bull; * «lit litt) &bull; * * itii * ti Ii &bull; · * I « I I t I I _ 6 The strand lying in the collecting tanks rotates in the direction of the countercurrent flow of the collected treatment liquor, 5. Device according to claim 4, characterized in that at the end of the running run of the rotating sieve belt (23) spray pipes (24) are attached which act on the sieve belt from the inside outwards. 6. Device according to claims 1 to 5, characterized in that for supplying the treatment liquor from the collecting containers (15, 16, 17, 18) to the web of fabric (10), lint-insensitive distributor pipes (25, 26, 27) are provided on the lower fabric guide rollers for the direct introduction of the circulated treatment liquor into the gussets between the web of fabric (10) and the deflection rollers. 7. Device according to claims 1 to 6, characterized in that flat jet nozzles (28, 29, 30) supplied with the circulated treatment liquor are arranged at the outlet of each treatment compartment (12, 13, 14) for supplying liquor into short, approximately horizontal web guides. 8. Device according to claim 7, characterized in that control elements for the amount of circulated treatment liquor are provided in the supply lines to the distributor pipes (25, 26, 27) and to the flat jet nozzles (28, 29, 30, 38). 9. Device according to claims 1 to 8, characterized in · r that the surface jet nozzles (28, 29, 30) at the outlet of each treatment compartment (12* 13, 14) are replaced by internal intermediate squeezing devices of a known design, 10. Device according to claims 1 to 9, characterized in that on the upper deflection rollers for the web of material (10) there are arranged ?» feeding rollers for increasing the treatment effect. 11. Device according to claims 1 to 10, characterized in that water locks (31, 33) are provided at the inlet of the web of material (10) into the treatment device (11) and at the outlet from the treatment device. 12. Device according to claim 11, characterized in that water locks (32) with partition walls are installed between individual treatment compartments, shielding the compartments from one another. 13. Device according to claims 1 to 12, characterized in that when chemical treatments are included in the overall treatment in one or more treatment compartments, the blessing flow of the treatment liquor around these treatment compartments occurs when the level in the associated collecting containers is lowered and standing chemical baths are switched on, and that intermediate squeezing devices are arranged at the outlet of these compartments.