JP2020532665A - Plant for water content treatment of textile products - Google Patents

Abstract

Plants for water-containing treatment of textile products include treatment containers (1) for accommodating treatment baths for chemical processes and / or cleaning or rinsing processes and are added to the solutions forming the respective treatment baths. Includes a single preparation container (27) for adding the agent. The preparation container (27) is a transport device (34) through which the additives introduced into the preparation container in solid and / or concentrated form and in small amounts can be mixed with the treatment solution. It is assigned to 34).

Description

The present invention is a plant for water-containing treatment (wet treatment, washing) of textile products, for accommodating a treatment bath for a chemical process and / or a washing process (washing operation) or a rinsing process (rinsing operation). The present invention relates to a plant, which comprises a treatment vessel for adding additives to the solution forming each treatment bath. The processing container and the preparation container are connected to the preparation container to transport the contents of the preparation container to the processing container and are a control means, whereby the addition of the additive to the solution is controlled by the demand response method. They are fluidly connected to each other through a conduit that includes a pump (associated) assigned to the control means.

For example, the dyeing process of a textile product is generally carried out in several processing steps such as pretreatment, prebleaching, main bleaching, dyeing, rinsing and cleaning and posttreatment. For these treatments, various treatment baths are used, for example, in treatment vessels configured to be pressure resistant. To that end, suitable chemicals and dyes are continuously supplied to the processing vessel in a particular order for each type of fabric.

In practice, generally 3-4 preparation containers are used per dyeing plant, in which the preparation container having 100% of the solution volume of the processing container for preparing the starting bath and the dye. A preparation container having 12% to 18% of the total volume of the solution is used for preparing the dye, while chemicals (alkalis for reactive dyeing, acids for PA dyeing, etc.) are added to dye. A preparation container having 8% to 10% of the volume of the solution is used for separating the dyes. Since chemicals have a large effect on dye uniformity, they are injected relatively slowly, typically over 30-60 minutes, i.e. linearly, incrementally or taperingly into the processing vessel. To. It is then known to measure the water level in each preparation vessel for control of infusion and use the water level as a controlled variable value for the infusion process. To achieve sufficient injection accuracy, these containers must exhibit sufficient water level to obtain a usable real-value signal. The water level signal is then controlled by the controller according to a linear, increasing or decreasing target curve. For this reason, these chemicals cannot be supplied from larger preparation containers, and smaller volume-adaptive containers must be used, and the available water levels with such smaller containers. The signal can be acquired with the required accuracy. For the addition of solids, another vessel with a volume of about 7% to 15% of the solution volume of the processing vessel is used.

Most of these different preparation vessels occupy a significant part of the installation area of the dyeing plant. In addition, manufacturing and material costs are high, resulting in container costs of nearly 40% of the total cost of the dyeing plant.

Patent Document 1 discloses a plant for water-containing treatment of spun yarn or woven material that operates using two preparation containers, both of which are provided with dedicated pumps, and dosing valves mutually and. Additives prepared in the preparation vessel can be introduced into the processing vessel through them. One of the two preparation vessels is arranged to accommodate the entire solution volume of the processing vessel and has a cylindrical upper portion and a conical lower portion, the two vessel portions assigned to the water level sensor. A heating system is provided in the lower container portion. The container is not arranged for adding solids and concentrated additives. In general, concentrated additives must be diluted with fresh water (fresh water), mixed, heated and then reintroduced into the treatment bath of the treatment vessel.

International Publication No. 2011/104665 Pamphlet German Patent Application Publication No. 10 2013 110 491 German Patent Application Publication No. 10 2005 022 453

An object of the present invention is to provide a plant of the above-mentioned type for water-containing treatment of a woven fabric product, which requires almost no space and can be used universally with high efficiency.

To achieve this object, the plant according to the invention includes the features according to claim 1.

This new plant will operate with only one preparation vessel that accommodates the solution volume of the treatment bath, i.e. the preparation vessel will be sized so that it can hold 100% of the solution volume with respect to its size. In addition, the preparation vessel is arranged to contain and inject a volume of additive that is smaller than the solution volume. The preparation container is then assigned to a transport device, whereby the additives introduced into the preparation container can be mixed in solid and / or concentrated form and in small amounts.

The transport device allows a much smaller amount of additives to be injected into the processing vessel. For example, a minimum volume of only about 1% of the total solution volume can be added linearly, incrementally or incrementally to the processing vessel during a period of about 30-60 minutes.

In a preferred embodiment, the transport device comprises an ejector comprising a jet nozzle and a mixing chamber, the jet nozzle of the ejector may be loaded with a solution jet stream by a pump, and the mixing chamber of the ejector is connected to a preparation vessel. .. The plant may include a spray circuit containing a pump for the solution to be pumped, said circuit passing through a preparation container, including a transport device, and may be selectively operated.

The preparation vessel is advantageously connected to the processing vessel via a line containing a pump and a dosing device (measuring device) that operates on the basis of one volume measurement downstream of said pump, thereby adding additives. Allows volumetric infusion. A particularly cost-effective condition is obtained when existing pumps are used with downstream dosing valves (throttle valves, proportioning valves) to transport the additives. The dosing valve can be, for example, an on-off valve that can be controlled as planned (as programmed) by the control means, in which case it is controlled by the control means using pulse width modulation according to each desired injection characteristic. It is beneficial to be done. However, it is also possible to use other dosing valves that allow basically time-dependent control of the injection of additives added to the solution suitable for that purpose based on volumetric measurements.

As mentioned above, in the finishing process of the textile, in the middle of the controlled process, about 3 to 10 kinds of fluids are supplied to the treatment bath in the form of chemicals or dissolved solids, depending on the method adopted. .. In fact, these fluids are often diluted, generally by adding fresh water to an open container, then mixed, heated and then introduced into the treatment bath. Currently, containers of various sizes are used for fluid preparation. Each of these containers is provided with a pump, heating device, mixing device and water supply device.

However, the amount of fresh water supplied significantly increases the bath ratio in the treatment vessel. For example, the bath ratio for medium to dark color dyeing increases from 1: 3.5 to 1: 6 and further to 1: 7. Many chemicals and auxiliaries must be injected in milliliters per liter of solution with respect to the final volume, in this example 1: 7 of the treatment bath. Considering this group of chemicals and auxiliaries, the increase in water consumption is caused by the addition of fresh water, which may not be needed in the actual finishing process. Such an unnecessarily long treatment bath must be sufficiently heated and cooled, which is accompanied by an increase in the amount of additional energy (steam) and cooling water used.

The preparation vessel of this new plant is arranged to contain additives that are added in small amounts, the additives being present in solid and / or concentrated form. The chemicals and auxiliaries that form these additives can be introduced directly into the preparation vessel. However, the device can be such that the preparation container is assigned to at least one buffer container set up to contain such additives, the buffer container being fluidly connected to the preparation container and the additive. Is arranged to contain in a concentrated form. Thereby, the chemicals and auxiliaries can first be filled in at least one buffer container in concentrated form. At the timing specified by the controller, the liquid can be transported into the preparation vessel, eg, pulsed, using an on-off valve or through associated valve means with a proportional opening valve, or preferably discharged into the processing vessel by gravity. Can be done. The additives thus introduced are transferred from the preparation container to the transport device, whereby they are mixed with the solution. In this way, chemicals and auxiliaries, ie additives in general, can be supplied without the use of diluted amounts of fresh water in the treatment bath. As mentioned above, the result is reduced consumption of chemicals, auxiliaries, steam and cooling water, which reduces the number of rinsing steps, which can also reduce process time.

Other embodiments and advantages of this new plant can be seen in the following description and drawings of exemplary embodiments of the invention.

It is a top view and a schematic view of a jet dyeing plant. It is the schematic of the hydraulic line of the jet dyeing plant by FIG. 1, and shows the component necessary for this invention. It is a schematic diagram of the second solution circuit and shows different operating states. It is a schematic diagram of the second solution circuit and shows different operating states. It is a figure which shows the different operation mode of the dosing valve and the second solution circuit by FIG. It is a figure which shows the different operation mode of the dosing valve and the second solution circuit by FIG. 3 is a schematic cross-sectional view of the ejector of the second solution circuit according to FIGS. It is a schematic partial view of the preparation container of the jet dyeing plant according to FIG. FIG. 8 is a corresponding schematic perspective view of the preparation container according to FIG. 8 relating to the buffer container and the ejector. A modified embodiment of the preparation container of the jet dyeing plant according to FIG. 1 is shown in a schematic diagram.

The water content treatment plant for textile products shown in the schematic diagram in FIG. 1 is a so-called jet dyeing plant for intermittent treatment of strand-shaped textile products. The plant includes a closure vessel 1 in the form of a pressure vessel, which is a cylindrical shape that is airtightly welded (to prevent pressure leakage) to a torispherical head or elliptical head 3 on the end side. Has a container wall 2 of. On the operator side, the container wall 2 is provided with an opening 4 for taking in and out that can be closed. As can be inferred from the schematic view of FIG. 2, the processing vessel 1 includes a transport nozzle device 5, which, for the purpose of processing, is a material continuous in the direction of arrow 7 as shown in FIG. It is possible to rotate the strands.

The transport nozzle device 5 includes a hydraulic transport nozzle 9, which is described in detail in, for example, Patent Document 2. The transport nozzle 9 is provided with a material strand inlet opening 10 on one side and a transport pipe 11 on the other side through which the material strand 6 taken in from the inlet is transported to the outlet bend 12, and the outlet bend 12 The material strands move from to the material storage. At that time, the material strands exiting the outlet bend 12 are plaited to form a material strand package, which is moved to the storage. The associated plaiting machine acting on the transport pipe 11 and / or the outlet bend 12 is shown schematically in 13, while the related blower 14 is shown schematically. For other details, refer to, for example, Patent Document 3.

The transport nozzle 9 is located within the main solution circuit 15 shown by the wide solid line of FIG. 2, which includes the main solution pump 16 and the transport nozzle in the main solution line 17 exiting the solution reservoir of the processing vessel 1. A main solution stream to be supplied to 9 is generated, and the flow direction of the stream is indicated by arrows 18, and the heating device 19 and the filter 20 (FIG. 1) are specifically depicted as known per se. Move through not with other devices.

The second solution circuit diverges from the main solution line 17 at 21 (FIG. 2), the line system 22 is described by a thin line in FIG. 2, details of which are shown in FIGS. 3 and 4. There is. The pipeline system 22 of the second solution circuit includes a supply pipeline 23, which is connected to the main solution pipeline 17 at 21, the supply pipeline having a closing valve 24 and a solution pump 25 downstream thereof. Including, the pump transports a second solution stream in the direction of arrow 26. The second solution stream thus generated contains the chemicals, auxiliaries, etc. that are briefly grouped together as additives for the material strands 6 in the processing vessel 1 and for each processing process. Is arranged for the treatment bath preparation to be added to the treatment bath.

For this purpose, a preparation container 27 is placed next to the processing container 1, which has a essentially square cross-sectional shape in the exemplary embodiment of the figure, the form of which is not limited thereto. The preparation container 27 may have a cylindrical or polygonal form or other form suitable for the purpose. As can be inferred from FIGS. 8 and 9, the preparation vessel has a conical bottom 28 extending toward the intersection of the diagonal lines and is on the pressure side of the solution pump 25 via the closure valve 29 (FIG. 2) and the conduit 30. Connected to. The preparation container 27 is provided with a water level sensor 30, which makes it possible to measure and display the water level of the fluid contained in the preparation container. At the lowest point of its bottom 28, the preparation vessel 27 is provided with a fluid outlet 31, which is connected to the mixing chamber 33 of the ejector 34 via a conduit 32, the basic design of which can be inferred from FIG. .. The jet nozzle 35 connected to the pressure side of the solution pump 25 via the pipe line 36, the valve 37, and the pipe line 30 ends in the mixing chamber 33. On the opposite side of the jet nozzle 35, the mixing chamber 33 is connected to the diffuser 38 via a short tubing component, which leads to the tubing 39 containing the shutoff valve 40 and downstream to the main solution tubing 17. To. Further, the mixing chamber 33 is connected to the supply pipe line 23 via the pipe line 41 and the closing valve 42 on the suction side of the solution pump 25.

Further, the pipeline 43 branches from the pipeline 30 connected to the pressure side of the solution pump 25, and the pipeline 43 is connected to the main solution pipeline 17 via the dosing valve 44, and the closing valve 44 Upstream, a bypass line 45 having a larger diameter and also including a closing valve 46 connected to the main solution line 17 branches off from it.

The preparation vessel 27 may be filled with three different types of fresh water from a water source (not shown) via valves 460, 47 and pipeline 48. Further, in the region between the valve 46 and the main solution line 17, the line 45 branches from the line 48 upstream of the valve 47, and the valve 51 arranged in the line 50. It is possible to supply water directly through the pipe.

The jet dyeing plants described so far operate as follows.

The preparation container 27 is sized to accommodate the entire bath volume of the treatment bath of each treatment step in the treatment container 1. As an example, the preparation container 27 contains a bath ratio of 1: 4, that is, 300 kg of woven material and 1200 liters of fluid.

During the first treatment step, the preparation vessel 27 is filled with the volume of fresh water specified for the treatment bath through the conduit 48 with the valve 47 open and the valve 460 open. It is identified via the water level sensor 30.

Valves 29, 37, 40, 42, 44, 46 and 51 are closed.

Depending on the processing process, the contents of the preparation vessel 27 are placed on the flow path shown by the dashed line in FIG. 3 via the mixing chamber 33 of the ejector 34, the open valve 42, the open valve 46 and through the bypass line 45. , The solution pump 25 can supply directly to the main solution circuit 15 without adding any additives. The bypass valve 46, like the pipeline 45, is configured to have a relatively large passage cross-sectional area, which ensures that the preparation vessel 27 can be quickly emptied. The main solution pump 16 directly transports the volume of the solution supplied to the pipeline 17 into the processing container 1.

During the other treatment steps, for example, a small amount of additive will be injected into the treatment container 1. To that end, the total volume of fluid to be injected is introduced into the preparation vessel 27, where it is detected by the water level sensor 30 and reported to the controller shown in FIG. 520. For example, 10 liters of additive will be injected into a 1000 liter container 1. Occasionally, the minimum volume of additive is only 1% of the total solution volume of the treatment bath and is linearly, incrementally or taperingly injected into the treatment vessel over 30-60 minutes depending on the composition of the treatment bath. There must be.

During the 30-60 minute injection operation, if the target / actual numerical control via the water level signal of the water level sensor 30 is very inaccurate, the injection will be based on volumetric measurements. For this purpose and with the aim of making the overall plant design as cost-effective as possible, the existing solution pump 25 is used for this purpose along with the downstream on-off dosing valve 44. The dosing valve is actuated by a controller 520 with pulse width modulation that displays the desired injection characteristics. Controlled supply by volumetric measurement of the additive can be done in a variety of ways, in which case only two possibilities are described as an example.

1. 1. Dosing valve 44 with constant flow rate characteristics
The dosing valve 44 displays a constant pressure characteristic. At that time, the transport amount of the valve opening pulse is kept constant regardless of the opposite pressure of the processing container 1, and as a result, the transport amount of the dosing unit can be accurately predetermined within each dosing pulse. For example, in the case of a valve, for example a 0.1 second open pulse, the transport volume is always 50 mL regardless of the opposite pressure of the processing vessel 1. For example, for other injection periods with a 3 second open pulse, the transport volume is always 1500 mL regardless of the counter pressure. The volume percentage (deposition percentage, vol%) transported during the opening and closing period of the valve is accumulated in the controller.

The controller of controller 520 calculates the pulse duration of the dosing valve for each injection period and subtracts the amount already delivered to the processing vessel 1 from the total amount detected at the start of injection. The determination of the pulse width ratio is influenced by the calculation of the pulse and pulse time matching the desired gradual, linear or declining injection curve for each of the media to be injected. During the injection operation, the water level sensor 30 of the preparation container 27 is not referenced.

2. Pulse curve stored in the controller in connection with the pressure measurement in processing vessel 1:
For example, the transport characteristics of the solution pump 25 configured as a centrifuge pump are generally stored in the controller 520 in the form of a function graph. The static pressure in the processing container 1 is measured by the pressure sensor and delivered to the controller. These two data allow the operating point of the solution pump 25 and thus the transport volume of the solution pump to be identified for each opposite pressure without the use of additional sensors. The transport volume of the solution pump 25 is known and the appropriate pulse / pause width for the dosing valve 44 is selected so that any incremental, linear or declining supply characteristic at the desired supply time can be achieved. .. Also in this case, the water level signal of the water level sensor 30 of the preparation container 27 is not used.

The basic control of the dosing valve 44 is illustrated by two figures according to FIGS. 5 and 6. In the example according to FIG. 5, the dosing valve 44 opens completely after each pulse and closes again shortly thereafter. By appropriately selecting the opening and closing times and especially the temporal pulse interval, the amount of transportation passing through the dosing valve 44 is controlled in a demand-responsive manner.

The pulse form for opening and closing the dosing valve 44 shown in FIG. 6 differs from the form according to FIG. 5 in that after the dosing valve is opened, it is kept open for a longer period of time and then closed again. This type of pulse width control is especially for relatively large transport volumes.

With the valve 46 closed, the flow path for auxiliary injection of the additive from the preparation vessel 27 as described above follows the flow path shown in FIG. 3, which in this case is the dosing valve 44. It extends through the main solution line 17 through the dashed line in the region of the dosing valve 44 of FIG.

By using one preparation container 27, a smaller amount of additive can be introduced into the processing container 1 in a specifiable increment based on volumetric measurements up to a minimum amount of only 1% of the total amount, the solution pump 25 of the present invention. By use, the preparation vessel 27 is used for all supply tasks to the processing vessel 1. Such an operation mode is illustrated by an exemplary method with reference to FIG.

A small amount of additive as shown in 500 in FIG. 8 is introduced into the preparation container 27. When the valves 24, 37 and 40 are opened, the solution pump 25 sucks the solution from the main solution line 17, and thus the processing vessel 1, and supplies it to the jet nozzle 35 of the ejector 34, so that the ejector is in the line. The additive retained in the preparation vessel 27 via 32 and preferably collected in the bottom region of the cone is sucked in and mixed with the solution jet stream in the mixing chamber 33. At that time, complete mixing of the additive and the treatment solution occurs in the mixing chamber. At the same time, the supplied fluid becomes the temperature of the processing solution. Downstream of the mixing chamber 33, the mixture of the added fluid and the treatment solution moves into the diffuser 38 of the ejector 34. Here, the supplied fluid and the processing solution are more completely mixed and the flow energy is converted into pressure energy. Downstream of the ejector 34, which thus forms the transport and mixing apparatus, the conduit 39 leads directly into the main solution conduit 17 and thus into the main solution circuit extending into the processing vessel 1. If necessary, a stationary mixer or additional ejector for further mixing and possibly increasing the pressure may be interposed between the diffuser 38 for the processing vessel 1 and the main solution line 17.

The flow path of the new plant in this mode of operation is shown by the dashed line in FIG. As is self-evident, the supply point 210 is positioned where the solution from the ejector 34 is supplied into the main solution line 17 via the line 39, in which the flow direction 18 of the main solution circuit is: The second solution circuit line 23 heads downstream of the point 21 where the main solution line 17 branches, whereby the solution pump 25 always takes in the solution from the processing vessel 1.

The additive introduced into the preparation vessel 27 can also be premixed with or diluted with the solution in the preparation vessel 27 so that the valve 29 in the conduit 30 opens in a suitable manner.

The preparation container 27 can also be used, for example, to introduce a solid such as a salt for reactive staining. The solid (solid matter) is introduced into the preparation container 27, where the solution introduced through the conduit 30 and the opening valve 29 is sucked into the solution before or sucked into the ejector 34 via the conduit 32. It can be dissolved while it is being mixed and mixed into the solution stream as described above.

The valve that controls the suction of the additive introduced into the second solution circuit and the preparation vessel 27 is appropriately controlled by the control device 520, in which case again, for example, the appropriate pulse width control of the valves 37, 40 in particular. Dosing based on volumetric measurements can be performed by the method already described.

Today, many larger dyeing plants have automated feed or feed systems for chemicals and / or dyes, generally additives. It may be convenient to allocate at least one buffer vessel 55 to the central multifunction preparation vessel 27 described above in order to avoid waiting time. In smaller plants, it makes sense to assign such a buffer vessel 55 to the central preparation vessel 27 to complete the already started staining process automatically-automatically and unattended-during the night shift. possible.

Such a buffer container 55 is shown, for example, by FIGS. 2-4. It is connected to the preparation container 27 via a line 56 exiting from its bottom, which line contains a valve 57. In addition, it is assigned to a water level sensor 58 for the fluid contained therein. Fresh water can be supplied to the buffer container 55 via the valve 60 connected to the pipeline 59 and the pipeline 50. The buffer vessel 55 has a conical bottom 60, where the conduit 56 exits from its lowest point, whereby a small amount of additive can also flow out of the buffer vessel 55, leaving no residue. ..

In a preferred embodiment schematically shown in FIG. 9, the buffer vessel 55 is arranged literally beside the preparation vessel 27 so that its fluid conduit 56 ends above the bottom 28 of the preparation vessel 27. In this way, the buffer container 55 is connected to the preparation container 27 in such a way that its contents, including water for rinsing used for cleaning the buffer container, can flow into the preparation container 27 by gravity. The additives thus introduced into the preparation vessel 27 are further mixed in the preparation vessel 27 and subsequent mixing pathways, depending on the processing conditions, and then delivered to the processing vessel 1 as described in detail above. To.

In a typical mode of operation, the additive is filled into the buffer vessel 55 in the form of concentrated chemicals and auxiliaries. At the timing specified by controller 520, these additives are prepared in a pulsed manner by gravity by opening the valve 57 at the lower end of the buffer vessel 55, either by using an on-off valve or by using a proportional opening valve. It is discharged to 27. This discharge operation can be performed linearly, incrementally or incrementally during a time specified within the controller of the device. This liquid additive exits through a valve 57 at the bottom of the buffer vessel 55 and flows to the lowest point of the bottom 28 of the conical preparation vessel 27, from which it is sucked by the injector 34 as described above. It can be mixed with the solution stream transported by the solution pump 25. Alternatively or simultaneously, such concentrated additives can also be introduced directly into the preparation vessel 27, also as previously described.

Therefore, the new plant will allow the additives to be supplied in a controlled manner without increasing the consumption of fresh water, which represents a substantial advantage of this plant, as described above. Additives also introduced into the preparation vessel 27 in small and concentrated form via the transport device represented by the injector 34 are also sucked from said vessel, after which they are thoroughly mixed with the solution stream and they are Can be supplied to the processing container. At that time, it is not necessary to add fresh water that makes the treatment bath in the treatment container unnecessarily long. The number of rinsing steps as described above results in the reduction of the amount of chemicals, auxiliaries, steam and cooling water used by eliminating the need to use the amount of fresh water supplied to the treatment bath for dilution. Process time is shortened because Furthermore, such an improved bath ratio leads to an improvement in dyeing uniformity or a reduction in dyeing time when the uniformity is already sufficient, for example, in discontinuous separation dyeing.

Due to the basic design of the preparation vessel shown in FIGS. 8 and 9, only one vessel can be used for all supply tasks to the processing vessel 1 as described above. In some cases, it can be assigned to a solids feeder (eg, in the case of salts for reactive staining).

For smaller dyeing plants, the height of the preparation vessel 27 is typically about 1100 mm and can be operated from above. Generally, the container is closed at the top. The cover has flaps for adding additives by hand.

For larger dyeing plants, the height of the preparation vessel is typically up to about 2300 mm. However, the injection process, dye bath preparation and refilling operations often require only the lower portion of the container. In these cases, it is advantageous to use the preparation vessel 27a, which is shown only schematically in FIG. For the manual addition of additives, ie chemicals, dyes and solids, a closed flap 600 is typically provided at a height of about 1100 mm and the additive can be filled through the flap. From the flap 600, such additives are filled into the container to a filling level of about 1050 mm. The 50 mm overflow edge prevents the additive from coming out of the lower edge of the flap. This filling level therefore corresponds to about 25% to 35% of the total volume of the vessel, which is sized to accommodate the total volume of the treatment bath.

The preparation container 27a may, of course, have any form suitable for each purpose. For example, it can be cylindrical or polygonal. In each case, it has a conical, downwardly tapered bottom, similar to the bottom 28 of the exemplary embodiment according to FIGS. 8 and 9.

The container arrangement described above can be used in discontinuous hydrous treatment plants of all designs, such as plants for spun yarn dyeing, beam dyeing, jigger dyeing, jet strand dyeing and the like. Applications are also envisioned for continuous hydrous treatment plants and plants that use pressureless treatment vessels.

Claims (15)

A plant for water-containing treatment of textile products, added to a treatment container (1) for accommodating a treatment bath for a chemical process and / or a washing process or a rinsing process, and each solution forming the treatment bath. The processing container and the preparation container include a preparation container (27) for adding an agent, and the contents of the preparation container connected to the processing container (1) are transferred to the processing container (1). A line containing a pump (25) for transport, which fluids mutually through a line assigned to a control means (520) that allows demand-responsive control of the addition of additives to the solution. Connected and
The preparation container (27) is sized to accommodate the solution volume of the treatment bath.
The preparation container is arranged to contain and discharge a volume of additives smaller than the solution volume, and the preparation container is assigned to a transport device (34) through which it is placed in the preparation container (27). A plant in which the additive introduced in small amounts in solid and / or concentrated form can be mixed with the solution. The mixing circuit includes a mixing circuit including the pump (25) and the transport device (34) for the solution transported by the pump, and the mixing circuit is fluid connectable to the processing container (1). The plant according to claim 1, wherein the plant is characterized by. The transport device includes an ejector (34) having a jet nozzle (35) and a mixing chamber (33), the jet nozzle of the ejector (34) being loaded with a solution jet stream transported by the pump (25). The plant according to claim 1 or 2, wherein the mixing chamber of the ejector (34) is connected to the preparation container (27). A spray circuit (29/30) containing the pump (25) for the solution transported by the pump is included, the circuit extending through the preparation container (27) and optionally being actuated. The plant according to claim 2 or 3, characterized in that. The plant according to claim 4, wherein the spray circuit extends through the transport device (34). The preparation container (27) is connected to the processing container (1) via a pipeline including the pump (25) and a dosing device (44) that operates based on volume measurement downstream of the pump. The plant according to any one of claims 1 to 5, wherein the plant is characterized by the above. The plant according to claim 6, wherein the dosing device has a dosing valve (44) that can be operated as scheduled by the control means (520). The plant according to claim 7, wherein the dosing valve (44) is operated by pulse width modulation. The plant according to claim 8, wherein the dosing valve (44) has a constant pressure characteristic such that the flow rate per unit time is independent of the opposite pressure in the processing container (1). The pump (25) has a predetermined transport characteristic curve, and the control means (520) determines each of the pumps (25) on the transport characteristic curve per unit time, depending on the pressure controlled in the processing container. The plant according to claim 8, wherein an operating point for specifying a desired transport amount of the above can be determined as scheduled. The plant according to any one of claims 3 to 10, wherein the ejector (34) is arranged at the bottom of the preparation container (27). At least one buffer container (55) arranged to contain the additive is assigned to the preparation container (27), and the buffer container is fluid-connected to the preparation container. The plant according to any one of claims 1 to 11. 12. The plant of claim 12, wherein the at least one buffer vessel (55) is arranged to accommodate a concentrated form of additive. The at least one buffer container (55) is connected to the preparation container (27) via a pipeline including a valve means (37) controlled by the control device (520), and the preparation is made through the valve means. The plant according to claim 12 or 13, wherein the flow of the additive into the container (27) can be controlled as planned. The plant according to claim 14, wherein the at least one buffer container (55) is arranged so that its contents flow into the preparation container (27) by the effect of gravity.

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