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YARN DYEING INDUSTRY

OPTIMAL HYDROEXTRACTOR MATHEMATICS OF HYDROEXTRACTION BOUGHT BY


HYDROEXTRACTION The Operation of Water Removal Mechanically from Textile Packages is Hydroextraction Which means, Water Removal Can also take place with Air Pressure as seen in case of Rapid Dryer Technology The Mechanical Hydroextraction is so far preferred Against Pneumatic Extraction for its Cost Efficiency. The Advantages of Pneumatic Extraction being zero handling of packages with nice and clean packages coming out of the Rapid Dryer after the process.

Let us Study the Optimal Design of Hydroextractors

Hydroextractors Basket Type Or Axis Type The Axis Type was the newer development from Basket Type, where the package spins around its own axis. However has a major Design Flaw, that does not support the Basic Technology of Moisture Removal from Textile Packages

Let us have a Critical Analysis Fo Both Hydroextractors Mathematically


BASKET TYPE HYDRO

Two Most Important Factor In Centrifuging Centrifugal Acceleration During Spinning Time For Which Spinning is Continued

Centrifugal Acceleration Governs The Rate Of Water Removal From Porous Package, This Also Defines When The Equilibrium Stage Is Reached Between Surface Tension And Centrifugal Forces The Governing Equation C= 4(2)f (2) r Where f is the frequency of rotation of centrifuge Within Bracket shows, to the power of the preceeding symbol Variation of Centrifugal Acceleration is Cause For Terminal Retention of Water in a Package


Retention is Time Dependent : Water before escaping from Package should Move Through It To Outside Surface Rate of Movement Depends Upon Balance Between Viscous Flow Forces And Accelerating Centrifugal Force And Restrains Capillary Forces Large Capillaries Empty First and Small Capillaries Empty With Difficulty The Mass of Retention In Capillary is Given By the Equation Ahσ = lτCosθ / C Where A is the Area of capillary, l the peripheral length of capillary, h the height to which the capillary is filled with water, σ is viscosity of the liquid, τ , the surface tension and θ the contact angle, C , the centrifuge acceleration. Hence Mass Retention is Inversely Proportional To Centrifuge Acceleration Αs C is increased, more capillaries opened and a stage is reached, when capillary retention is proportional to 1/ C At any point in the Package, the rate of Movement of Moisture (υ) in a centrifugal gravitation force (C) Is Given By υ = CK Where K is the Permeability of the package This is the maximum amount of water, that can be removed by Centrifugal Field Against Capillary Forces In case of Cotton, it is 45% Polyester Textured , it is 90 to 94% Acrylic : 90% Nylon : 90% Viscose : 30% Polyester Sewing Thread : 90% Based on the Above Numbers, it is now possible to Calculate the Spinning Time To Achieve the Equilibrium Stage For Hydro with speed variable.


Final Relationship Between Retention, Centrifugal Acceleration, And Time of Spinning is given by a complex mathematical calculations . If you wish to get these calculations, write to us. Conclusion For Basket Hydroextractors During Hydroextraction, water migrates from the Porous Package In Direction of Centrifugal Field. Rate of movement depending mainly on the Porous Structure of the Package, the water retention and the field strength. As larger pores empty, retention reduces and rate of flow declines until balance is reached when capillary forces retain moisture within the material against the influence of the centrifugal forces.

As per Theory, the Porosity of Package and Pore Size Distribution is an important element of Hydroextractors. Current Hydroextraction system does not provide the element of squeezing the water initially out of the package and creating enough porosity within the package for easy removal of water. A Pre Squeezer is a Pre Cursor to Good Hydro But Currently No Such Mechanical System Exist. Though, It Only Need Two Hydraulic Arms To Press The Package Column Before Spinning And Preferably Retain the Package With These Arms For Zero Distortion We Will Read Next In Axis Spinning Hydro, How The Design Flaw Damages The Packages And Gives Higher Level Of Water Retention


AXIS SPINNING HYDROEXTRACTORS

Unlike Basket Hydro , where at the Radial End of Basket, the Packages move with Basket. The Axis Spinning spins the Packages on its own Axis. In Basket Hydro, the Effect of variation of Centrifugal Field was insignificant for Moisture Retention. In Axial Spinning, the centrifugal acceleration depends upon the spinning speed and also depends upon the size of the package. Larger the Package, Greater The Acceleration Maximum Acceleration At Outside Cmax = 4π π(2)f(2)R0 Where f is freq. of rev, R0 is OD of Package Within Bracket shows to the Power of Pie or f


Where as the Average Acceleration within the package is given by

Cav = Cmax 2/3 ( R1/R0 + R0/ R1+R0) Where R1 is the ID of package As OD of Package Increases, Avg and Max acceleration Increase for a Given Speed Acceleration Increases as Rate of Rotation Increases But interestingly from the equation, as OD increases, the Cav reduces and hence the Water Retention in Packages Become Higher Technically, one would expect that Retention Of Moisture In Axis spinning packages should be lower then Basket Hydro But In Real Life Experiments it was seen that the Small Packages Dried More Then Large Packages exactly following the equation This is explained as below Moisture Is Distributed Evenly Through The Package High Retention Zone Occurs At Outside Surface, Most Remote From Centrifugal Axis

Spot The Large Molecules At The End Of Package after Hydroextaction Caused By Migrating Molecules To End Of Package Under Centrifugal Field But Unable To Escape On Account of Surface Tension Forces


For Same Value Of Cmax , effect of each zone retention on overall retention of moisture will be Proportional to Package Circumference / Cross Sectional Area That is R0/ C ( R0 (2) - R1(2)) Retained Water can be Divided Into Two Parts That Dispersed Throughout the Porus Material That Held At Or Near The Outside Surface Rate Of Equilibrium In This Case Depends Upon Porous Structure Field Strength Within Package

Conclusion Axis Type Hydroextractor Has A Major Shortcoming In Fluid Separation From Textile Material The Fluid Retention is as much as 3 Times Higher Then Basket Hydro With Fluid Concentration High On The Walls and Unequal Distribution Within Package The Power Consumption Is Higher within the centrifuging and much higher in subsequent RF Dryer Invariably Damages The Package As a Large Centripetal Force Acts Towards The Inner Wall

Correction To System It was First Done By Dr Frauchiger in Switzerland Who Designed Package Holding And Pressing To Break The Boundary Layer And A Much Higher Water Removal Against Axis Spinng Hydro Was Achieved With No Damage To Package


MOST INTELLIGENT HYDRO IN THE WORLD

SPOT THE DIFFERENCE PACKAGES ARE HELD INTERNALLY AND EXTERNALLY AND THE EXTERNAL LEAVES GIVE PRESSURE TO THE PACKAGE TO BREAK THE BOUNDARY LAYER OF RETAINED MOISTER PLUS SUPPORT THE PACKAGE AGAINST ANY KIND OF DEFORMATION COMPANY WAS LATER SOLD TO SCHOLL AND AFTER SCHOLL CLOSURE, THE THOMAS AND THOMAS OF LAB PRO KEPT THE DESIGN ALIVE NOW IS KNOWN AS HYDROC FROM LAB PRO THE BEST HYDRO THAT MONEY CAN BUY

MANTEX ECO CENTRES AND HYDROEXTRACTORS THE ONE AND ONLY REASON FOR A DYESPRING FAILURE IS THE POOR HYDRO DESIGN


IN INDIA, THE COMPANIES USING THIS HYDRO ARE ARVIND MILLS ABHISHEK MADUARA COATS ALL 3 HAVE HAD VERY GOOD EXPERIENCE WITH DYESPRINGS AND LONG LIFE OF DYESPRINGS WITH THIS HYDRO. IF YOU ARE INVESTING INTO NEW DYEING PLANT OR BUDGETING FOR A NEW HYDRO, THEN PLEASE THINK AGAIN ON THE SPINNING AXIS HYDRO THE MACHINE IS TECHNOLOGICALLY HANDICAPPED THE INVESTMENT IS NOT WORTH PLUS GIVES A HIGHER OPERATIONAL COST IN RF DYRING ON ACCOUNT OF HIGHER MOISTRE LOAD EVEN THE ORDINARY BASKET HYDRO IS BETTER THEN SPIN HYDRO, IF LAB PRO HYDRO IN UNAFFORDABLE

YOUR TECHNOLOGY PARTNER FOR YARN DYEING

31/9 NCP Towers, 1st Main, 2nd Floor Mt Joy Extension, Bangalore - 560 019 Telephone #-22427863/ 8722990033 Mobile #- 9743877863 info@dyespring.net Webiste: www.dyespring.net


Optimal Hydroextractor