The method of processing tissue and device for its implementation

 

(57) Abstract:

Oligomannose synthetic dressing fabric is washed and waste wash water is subjected to membrane separation and return to the production cycle, the treated water (permeate) and the valuable components. The process is conducted at a controlled flow rate of water when the flow speed of the partial solution over the membrane 3-4 m/s Before serving membrane filters waste wash water purified by flotation. A device for processing tissue contains the washing baths, guide rollers, squeeze rollers, the piping system and the circulation loop. According to the invention it is provided with a working capacity for the purification of waste wash water by flotation. The tank has an input pocket, perforated horizontal plate at the bottom and knot removal of foam at the top. The invention allows to expand the technological capabilities to use regenerate, achieving maximum efficiency and contingency in the work of finishing and cleaning equipment. 2 S. and 1 C.p. f-crystals, 1 tab., 1 Il.

The invention relates to the finishing of textile materials, in particular, to the development of resource-saving technologies, preduznanie many foreign firms at the request of the customer can be installed in parallel with the equipment of water purification. The purification of water is quite high, but the cost often exceeds the cost of finishing equipment, as well as footprint.

With the development of membrane technology for water treatment is now possible to create a local purification schemes from individual lines or baths with a return to the production cycle of purified water and valuable components, for example, dye dressings, etc.

The problem reset depleted, diluted impregnating baths solved in the invention described in the patent of Russian Federation N 1795990 "the Method of continuous processing of tissue, mainly macroalgae" (Pudicheva ie, Khokhlov, C. M. and others D 06 B 23/18, B 1993, N 6). Diluted macroalgae cloth impregnating solution stabilize concentration, directing it to the membrane separation elements for separating in the form of permeate excess solvent.

In some cases, of textile materials in the process of their manufacture and finish are impregnations of different technological solutions, which, after certain treatments and to achieve the required quality indicators of the finished product must be removed from the tissue completely. Such materials include slitwidth are pollution from processes rasshifrovka tissues (Century, Vasiliev, Y. M. Laslow and other wastewater treatment textile enterprises. - Moscow: stroiizdat, 1981).

Recently, increased use of synthetic dressing material for materials, caused by many reasons, among them the requirement for reduction of pollution of wastewater and the need to facilitate rasshifrovka when finishing on modern high-performance methods. Synthetic adhesives (PVA, CMC and others) can be separated from the waste wash water intact and reused. Effective regeneration prevent strong dilution of the wash water damage dressings when rasshifrovka and pollution dressing material for material. To address these problems were sent to the researchers.

In the invention according to the patent of Russian Federation N 1444424 "How rasshifrovka fabric and device for its implementation "(Kozlov centuries, Pudicheva T. S. and others, MCI D 06 B 23/20, Publ. BI 1988 N 46 (prototype) instead of making wetting and other chemical materials proposed times within 3 to 4 incoming rasshifrovka fabric, washing and membrane separation of waste wash water with the return of treated water and valuable components. It is possible to obtain a cleaner ri accumulation of wetting; it also gave the opportunity to get a more concentrated waste water containing valuable components.

The invention is quite simple and economical way to return to the production cycle smoothing to 25 kg PVA per hour on the dry product, and purified water with a temperature of 65 - 75oC.

However, when rasshifrovka harsh cotton fabrics in waste wash water at a temperature of 60 - 62oC and above are nitrogen-containing, wax, dyes (Morin, gossipteen and others), that is prirodoobustroystva cellulose fiber connection. Along with the insertion prescription in composition dressing plasticizers, lubricants, wetting, defoamers these substances are related severe pulp fiber and do not adversely impact on the glue and other properties of the dressing, the more so after the weaving process dressing should be removed with a tissue. The amount of impurities does not exceed 5 - 7% of the total number of regenerated synthetic polymer, but even this is enough to prolonged storage or transport to give the regenerator unpleasant odor, resulting in the oxidation of impurities, which is biological is salenew. Specifically the results of tests it is established that for this reason it is lost from 20 to 38 kg PVA per hour, which could be reused in case of a more pure product during its regeneration. Moreover, purification of the polymer can be widely used directly in the finishing production when dressing and printing of fabrics with a wide range.

In addition to the aforementioned difficulties in achieving optimal correlation between the amount of waste wash water spent on membrane separation, and performance of ultrafiltration installations: in order to avoid their go to place spare storage tanks, although this is not always justified and necessary.

The problem solved by the invention consists in the expansion of technological capabilities in the use of the regenerate, achieving maximum efficiency and contingency in the work of finishing and cleaning equipment.

To solve this problem in the proposed method, the water consumption for the processing of tissue and the surface of the membrane separation (number of membranes) is determined on the basis of quality indicators fabric (surface density, width, led is the target over the membrane.

In the proposed method of processing tissue, oligomannose synthetic dressing comprising washing the fabric and membrane separation of waste wash water to return to the production cycle of purified water and valuable components, and water, used in the development of tissue directly on removing the dressing establish, monitor and select on membrane separation in accordance with the relationship:

< / BR>
where P is the water flow in the processing of tissue without accounting for the ablation of tissue at steady state, pick up the ultrafiltration in the membrane installation, m3/h;

V - speed processing tissue, m/h;

G - surface tissue density, g/cm2;

h - the width of the fabric, cm;

r - coefficient of prickley dressing, %;

k - factor removal of the dressing with fabric, %;

Ctothe concentration of synthetic polymer in the concentrate, which plan to get, g/l;

Z - performance membrane units to permeate, m3/h;

- specific performance (permeability 1 membrane), l/m2h;

Z is the number of membranes, PCs;

- performance membrane units to concentrate, m3/h,

when the flow speed of the partial solution over a meme is compulsory cleaning flotation.

A device for implementing the method comprises a washing bath, guide rollers, squeeze rollers, the piping system and included in the circulation loop diversion of waste wash water pump and membrane filters. The device is further provided with nozzles of air leaks, installed in pipelines concentrate and work capacity with the input pocket formed by the container wall and a continuous vertical plate, followed by a perforated horizontal plate at the bottom of the tank. Supplying connection of the concentrate is over the front pocket. In the upper part of the vessel there is a node remove foam.

The problem is solved, in particular the fact that the process of membrane separation of waste wash water containing a synthetic polymer dressings, for example, PVA, leading at the speed of flow of the solution over the membrane equal to 3-4 m/s, instead of the practice of 2.0 - 2.5 m/s at the same, the conventional system pressure 0.1 - 0.5mpa.

It is established that the process of ultrafiltration when the velocity of the solution over the membrane 3-4 m/s has the following advantages:

1. Removes the impact of process concentricity.

2. Increases the performance of membrane ultrafilters, the number of which on this basis may be reduced.

3. The movement of the working solution at a speed of 3-4 m/s provides a more complete infiltration of air into the solution through the respective nozzles, and a more active ejection of air in the working solution contained in the vessel, which generally provides overload and partial dissolution of air in solution. This ensures that subsequent flotation and removal of impurities from the polymer concentrate.

The glut of processed leaching solution in the air and its partial dissolution it provides the adduct particles, bubbles and remove the particles with the smallest size, possess practically all the above-mentioned impurities in comparison with the size of the macromolecules synthetic polymer. Released from such solution micro-bubbles make a particularly fine particles of dirt on the surface of the solution in the form of foam, which are removed.

The process of membrane separation when the flow speed of the solution over the membrane W = 3-4 m/s and the location overlooking the specified stream velocity solution at 0,4 0,2 m the th mixture under a horizontal perforated plate, fulfilling the role of dispersive grating. As a result of undesirable impurities are removed by flotation. Diagram of the device shown in Fig. 1.

The device for implementing the method includes a washing bath 1, forcing the shafts 2, guide rollers 3, the intake pipe 4, which includes a metal grid for the detention of mechanical impurities, piping lead leaching the spent solution 5, the feed pump 6; circulation loop contains a working tank 7, the circulation pump 8, the pipeline summing up of the leaching solution 9 on membrane filters 10, equipped with pressure gauges 11 and valves 12, the pipeline flow of permeate 13, concentrate pipeline 14 with the outlet of air leaks 15. Pipe concentrate return from the pipeline 14 is located at a height of 0.4 to 0.2 m above the entrance pocket 16 formed by the container wall 7 and the vertical solid plate 17 that is parallel to the vessel wall and passing in a horizontal perforated plate 18 that is located parallel to the plate in the bottom of the tank 7. Node removal foam includes a horizontal rotating the bar 19, shifting the foam in the direction of the inner wall of the tray 20 on which the last of courage is to improve the concentrate to the place of its use.

The device operates as follows.

The resulting leaching solution containing all the components included in the recipe dressing (cottonseed oil, detergents, stearic, glycerin, IDC and other), as well as the impurity containing prirodoobustroystva cellulosic fiber connection (Morin, hostility), through intake unit 4 that includes a grid for the detention of mechanical impurities in the pipe 5 by a pump 6 is fed into the working tank 7. The circulation pump 8 through the pipe 9 delivers the solution on membrane filters 10, equipped with pressure gauges 11 and valves 12.

Parameters ultrafiltration: the rate of flow of solution over the membrane 4 m/s, pressure of 0.28 MPa, the membrane stamps, f-1, the relative permeability of 200 l/h, the number of membranes - 6, the concentration of PVA in the regenerator 20 g/L.

When the membrane separation into two streams, one of which permeate (purified water), through the pipeline 13 is diverted for reuse as hot process water. The concentrate pipeline 14 with the nozzle of the suction air 15, the second flow - concentrate solution enters in the input pocket 16 formed by the vertical solid plate 17 that is parallel to Tosti 7. Due to the difference 0.4 0.2 m in the level of solution in the vessel and the solution coming out of the nozzle pipe 14, is the ejection of air and aeration of the solution, which, bypassing the input pocket 16, due to the speed of the exit stream concentrate solution falls under the perforated plate 8, in the role of a dispersive grating. Here the air is crushed into smaller bubbles, and the formation of complexes "particle-bubbles that float to the surface of the solution in the form of foam. The above-mentioned impurities, as well as fine fibrils are easily subjected to flotation, which is the purification of synthetic polymer material (PVS) from impurities. Node removal foam, located in the upper part of the vessel, includes a horizontal rotating the bar 19, the shifting foam along the inside of the tray 20 on which the foam is discharged in the sewer.

The solution is concentrated, going through another cycle of the membrane separation by removing water in the form of permeate and cleared of impurities due to the removal of the latter in the form of foam. When the desired concentration is obtained regenerate (20 g/l PVA) by switching the valve is LASS="ptx2">

Received reclaim PVA was used in the preparation of coupling agents for treatment of bleached fabrics or printed as malozemelnye and ground drawings; preparation of thickening agents for printing inks, as well as in the dressing weaving basics (with long-term storage or transport of the latter (for more than 30 days) without any complications.

In the conditions of the AO Winter (weaving and finishing factory them. F. Zinovieva) were conducted production tests to assess the possibility of using waste wash water containing polyvinyl alcohol (PVA) for the preparation of coupling agents.

Rasshifrovka subjected to fabric art. 82068, the foundations of which were oshlifovki composition, g/l:

PVA (mark BI-H) - 80

PVA (mark 6-1-H) - 100

cottonseed oil - 0,8

the wetting - 0,4

stearic-6 - 1,3

glycerin - 8,0

The fabric came from a speed of 60 m/min in a bath 1, passing through the guide rollers 3 were washed with hot water (temperature of 85-95oC), push-UPS to a residual humidity = 90% on the spin cycle 2.

Water consumption was determined and supported on the basis of the above dependencies. The amount of water used to rinse the cloth and take on membrane separation, the led of the method and the device was obtained concentrate, containing 20 g/l PVA, and based on cooked sizing the following composition, g/l:

PVS - 10

Ammonium chloride - 3,0

Carbamoyl-2 - 40

Optical bleach - 1,5

This sizing of the treated fabric art. 50 and 548 in running mode on line LAO.

Processing mode: speed 70 m/min; centrifuge 90 5%; drying temperature of 100-120oC to a moisture content of 25-30% - drums, next to the required humidity in the chain field line. The fabric quality matches an existing state Standards and specifications, the results are given in the table.

1. The method of processing tissue, oligomannose synthetic dressing comprising washing the fabric and membrane separation of waste wash water to return to the production cycle of purified water and valuable components, characterized in that the processing of the fabric is carried out at a controlled flow of water, determined in accordance with the relationship:

< / BR>
where P is the water flow rate, m3/h, pick up on the membrane separation;

G - surface tissue density, g/cm2;

h - the width of the fabric, cm;

V - speed processing tissue, m/h;

r - coefficient of prickley dressing, %;

K - factor removal of the dressing in volume (m3/h), %;

Cto- end the (membrane permeability), l/m2h;

Z - surface separation, m2or the number of membranes at a flow rate of the partial solution over the membrane;

W = 3 - 4 m/s, while the waste wash water before applying on membrane filters are subjected to additional purification by flotation.

2. A device for processing tissue, oligomannose synthetic dressing containing the washing baths, guide rollers, squeeze rollers, the piping system and included in the circulation loop diversion of waste wash water pump and membrane filters, characterized in that it is further provided with a working capacity with the input pocket formed by the container wall and a continuous vertical plate, followed by a perforated horizontal plate at the bottom of the tank, the concentrate pipeline equipped with nozzles of air leaks and is located above the front pocket of the working capacity.

3. The device according to p. 2, characterized in that it is provided with a hub remove the foam, located in the upper part of the working capacity.

 

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