Method of wool scouring using counter flow

FIELD: textile; paper.

SUBSTANCE: method of wool scouring includes preliminary calculation and setting of the preset value of the counter flow of cleaning solutions during scouring of wool batch taking into account its make-time depending on a technological mode and qualitative characteristics of unsecured wool as well as regulating it by continuous feed with cleaning solutions in each previous washing bath, starting from the last one, against the current of wool with simultaneous draining of spent solution from the first bath to sewerage. Counter flow is actuated when concentration of the cleaning solution of the first bath is achieved up to 50 g/dm3, output flow of the spent solution drained through a flow metre is additionally controlled on the outlet port of the first bath fixing the highest level of liquid flow and estimating the value of counter flow which if necessary to regulate till the preset value is set according to nomogram received from the experimental data of dependences including wool yield and content of mineral mixtures in it corresponding to fixed level of flow, yield of drained solution with further analysis of its correspondence with to the preset value of counter flow, if current flow is diverged from the preset value it's regulated by changing it in accordance with nomogram till the necessary value is set, the highest value of solution flow drained through the flow metre.

EFFECT: method allows increasing efficiency of wool scouring decreasing consumption of water, washing agents, quantity of sewage runoffs as well as excluding additional production costs.

2 dwg

 

The invention relates to the wool industry, mainly for primary processing of wool, and can be used for washing the wool in a production environment with the use of countercurrent washing solutions.

The rinse party wool is carried out in a washing machine consisting of five or more baths with rollers at the end of each bath. Flushing is immersion breaking unwashed wool in detergent solution followed by advancing it along the bath, then unloading and supply of wool to the pressing rollers. During washing removes contaminants from pulp processed wool and transfer them in a cleaning solution with water and detergents. The cleaning solution is a drive washed with wool contamination. The glut of such contaminants in the washing baths leads to premature stopping of the machine for cleaning, a forced outage of the equipment, in addition, the quality of washing the wool, irrational use cleaning solutions containing not totally worked detergents, which drained into the sewer. To eliminate these disadvantages in the washing process uses a counter current of aqueous solutions of detergents, representing the flow of fluid in the washer against the progress of hair. The counter is designed to create in the washing solution of Rasnov is this between pollution concentration in the working solution and wool. At the same time to update the solution in all baths from the first bath should drain a certain amount of spent solution.

From a technology known method of washing the wool with the use of countercurrent washing solutions by continuously adjustable feed them in every previous washing tub, starting with the latter, toward the movement of wool, while draining the spent cleaning solution first bath in the sewer [1, 2] is the closest analogue. There is a method widely used by domestic industry in technology, primary processing of wool. Regulation of the counter is in its establishment in accordance with the set value, the previously calculated by the well-known formulas for each processed batch of greasy wool based on the characteristics of the milky machine (module baths, the concentration of solid particles in the solution first bath and others), the quality of raw materials (wool output, the content of mineral impurities and other), as well as on-time of the counter after filling machines [1. P80-81; 2. P.55]. According to the technological standards of maximum permissible concentration of solid particles in the washing solution first bath should be as high as 50 g/DM3, reaching which, accordingly, must connect the counter. Turning against the current at a specified time after refueling machine provides washing wool without deterioration of its quality characteristics. A necessary condition countercurrent to maintain the stabilization of the concentration of pollutants is draining the spent cleaning solution first bath in the sewer. Thus the flow rate of the drained solution (m3/h) is a quantitative characteristic of the counter that is installed in the washing process. However, as practice shows, the lack of control of this parameter is a significant disadvantage of this method. Uncontrolled consumption of the merged solution can not objectively assess the value of the counter and quickly adjust its value to a specified initial value, which, in turn, reduces the efficiency and quality of washing the wool, as well as higher production costs, consumption of water and detergents.

The technical problem to be solved by the claimed invention, the efficiency of washing the wool in reducing consumption of water, detergents, reducing the amount of sewage, as well as excluding additional production costs.

The technical result of the invention to eliminate these disadvantages, the method of washing the wool using countercurrent, including a preliminary calculation and establishment in the washing process of the party of wool given value of the however, the ka cleaning solutions with regard to its on-time depending on the technological regime of washing and qualitative characteristics of unwashed wool and its regulation by continuous supply of detergent solution in each previous washing tub, starting with the latter, toward the movement of wool, while draining the spent solution first bath in the sewer, is achieved as follows. The countercurrent include after the stabilization of the concentration in the washing solution first bath to 50 g/DM3on the output from the drain of the first bath advanced control flow is drained through the flow meter of the spent solution, fixing the upper liquid level. Assessment of the magnitude of the reverse current, which, if necessary, adjust to the specified values, conduct, placing the nomogram derived from experimental data dependencies given output of wool and its content of mineral impurities corresponding to a fixed level, flow, flow, pour out the solution and subsequent analysis of its compliance with the specified value of the counter. In case of rejection of backflow from the specified value, perform its regulation, changing in accordance with the nomogram, to the desired upper level flow is drained through the flow meter of solution.

The method of washing the wool with the use of counter-current is as follows.

In accordance with the regulatory process requirements of washing the wool [3, 4] before the beginning of the prepared party n the scoured wool is determined by calculating the magnitude of the reverse current, which must be installed in the washing process, and determine the operation time of the washing machine without backflow after refueling. For this purpose known in the feedstock, the yields of wool (In %) and its content of mineral impurities (M, %) on the graph (Fig 1) set the on-time counter current (t1, h, min), and the nomogram (figure 2) defines the upper level (1, 2, ..., 7) flow through the flow meter is drained washing of the spent solution from the first bath which corresponds to the value of the flow (m3/h)and the corresponding specified value of the counter (m3/h). In the washing process when the counter is additionally output from the drain of the first bath they control the flow of the merged exhaust solution of its corresponding specified value. To do this, use the flow meter, is additionally installed at the output from the drain of the first bath solution is drained. When leakage of liquid through the flow meter fix the upper level flow solution and is determined by the nomogram corresponding flow rate of the washing solution with the subsequent analysis of the compliance of the expenditure specified value of the counter. In case of rejection of backflow from the target value involved in its regulation, changing in accordance with the nomogram to the desired upper level of the new flow is drained through the flow meter solution. The change of the level of the flow is performed by the change in the counter-current regulated supply of water, detergents, cleaning solutions in the bath washing machine in accordance with the technology of washing the wool [3, 4] by opening and closing valves on perechodnik pipes and valves to supply solutions in the bath.

The nomogram get known method [5] based on experimental data dependency of the flow rate of the merged solution through the flow meter (m3/h) at the appropriate level (1, 2, ..., 7), his flow taking into account the output of wool and its content of mineral impurities. Similarly receive and build a graph of the dependence of the activation time of the counter.

The choice of conditions is defined as follows.

Additional control of the magnitude of the counter-current flow is drained spent cleaning solution first bath due to the fact that the definition of this indicator is output from the drain of the first bath allows us to evaluate the flow in accordance with a specified value, and in case of its non-compliance to conduct regulation.

The use of graphics and nomograms (figure 1-2) allows a short-cut method in comparison with traditional settlement, by indirect indicator of the level of the flow of cleaning solution through the flow meter to quickly and easily identify and quickly be installed in the process of washing the wool, protiviti the characteristics (turn-on time, the flow rate of the spent solution from the first bath) sufficient to ensure effective washing the wool with the preservation of its quality characteristics. When this is considered important for flushing the following factors: the content of mineral impurities in greasy wool with regard to output of wool, as well as maintaining stabilization of contaminant concentration in the washing solution first bath to 50 g/DM3.

Example. For a prepared party unwashed wool test results were: the output of wool=55%, the content of mineral admixtures M=12%. According to the schedule (1) determine the operation time of the washing machine without backflow after refueling (t1=3 h 10 min). After this time you must enable the counter, opening the valve on perechodnik pipes washing sinks and simultaneously adding water in the last tub and uterine cleaning solutions in the previous baths in accordance with the technological regime of washing the wool [3]. Along with this, on the nomogram (figure 2), taking into account the characteristics of the treated wool (=55%; M=12%) find the value of the counter (2.60 m3/h), which implies that when establishing the countercurrent flow of the merged solution first bath should be 2,60 m3/h, and the leakage of liquid through the flow meter should be held at a corresponding upper level 2. If the upper level flow is not soo what corresponds to this value (for example, in the washing process was recorded flow at the top level 1 or 3), you should hold the proper regulation of backflow, changing it to level 2.

Experimental studies in the development of the proposed method of washing the wool with the use of counter-current in comparison with the known method the traditional washing showed the possibility of increasing the efficiency of washing the wool with the preservation of its quality characteristics at lower 1.5 times the consumption of water, detergents, and decreasing, respectively, the number of sewage.

Sources list

1. Rogachev, NV Primary processing of wool / Navagate, Waheguru. - M: Light industry, 1967. - 328 S.

2. Rogachev, NV Some questions primary processing of wool / Navagate. - M: Light industry, 1980. - 184 S.

3. OST 10 319-2002. The coat. Standard process initial processing: Industry standard / GNU SNIEC RAAS. - An introd. first 2003-01-02. - Stavropol: GNU SNIEC, 2003. - 39 S.

4. Standard process initial processing / VNIIK. - Stavropol, 1989. - 80 S.

5. Recommendations for improving the quality of washing the wool on the basis of regulation backflow / GNU SNIEC RAAS. - Stavropol, 2007. - 25 S.

The method of washing the wool using countercurrent, including will precede the local calculation and establishment in the washing process of the party wool preset value of counter current washing solutions taking into account the time of its inclusion, depending on the technological mode of washing and qualitative characteristics unwashed wool and its regulation by continuous supply of cleaning solutions in each of the previous washing tub, starting with the latter, toward the movement of wool while draining the spent solution first bath drains, characterized in that the backflow include after the stabilization of the concentration in the washing solution first bath to 50 g/DM3on the output from the drain of the first bath advanced control flow is drained through the flow meter of the spent solution, fixing the upper level flow of fluid, and an assessment of the magnitude of the reverse current, which, if necessary, regulate the set value is carried out by setting the nomogram derived from experimental data dependencies given output of wool and its content of mineral impurities corresponding to a fixed level, flow, flow, pour out the solution, followed by analysis of its compliance with a given value of the counter current in case of deviations backflow from the target value involved in its regulation, changing in accordance with the nomogram, to the desired level, the upper level flow drained through the flow meter solution.



 

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