A New Grid Bar Design for a Modified Cylinder Cleaner

A New Grid Bar Design for a Modified Cylinder Cleaner

Sanh Le, Ph. D.

U. S. Cotton Research Unit

Stoneville, MS

Objective

• Design a seed-cotton and lint cleaner that:– is non aggressive– preserves fiber properties– yields high turnout– cleans efficiently

• Evaluate two seed-cotton packing methods

Test Method

• Test 1– 3 cleaner treatments– 2 varieties– 2 packing methods

Ginning sequence

Feed control Dryer

Seedcotton

Stick machine

Seed cotton

Gin standLint cleaners Condenser

Lint

Cylinder cleaner

Dryer

Cylinder cleaner

Modified Cylinder cleaner

Lint cleanersW/ 1 grid bar

45 degrees

1 in.

0.5 in.

Chisel-shape grid bar

Gap between bars: narrow (0.25 in.) or wide (0.375 in.)

FC

CC

SM, TM

MCC or SLC

Condenser, baler

EFGS

FC

MCC

SM, TM

MCC or SLC

Condenser, baler

EFGS

Test 1 Test 2

Step 1:seed cleaning

Step 2:lint cleaning

NFCCNCCCWCCC

NCHCCWCHCC

Cleaner treatments

1. Hybrid lint cleaner* with wide gap chisel-shape grid bars (WCHLC)

2. Hybrid lint cleaner with narrow gap chisel-shape grid bars (NCHLC)

3. Saw-type lint cleaner (SLC)

*Six-cylinder cleaner + saw-type lint cleaner with one grid bar

Varieties

• Hairy-leaf variety (STV4892)

• Smooth-leaf variety (DPL555)

Packing methods

• By hand

• Suction pipe

Experiment

• Split plot with cleaner treatments as the main unit.

• 30 runs with 3 replications

Test 2: 2 stepsStep 1: seed-cotton cleaning

• 3 Seed cotton cleaning treatments

Step 2: lint cleaning• 3 lint cleaning treatments (same as Test 1)------------------------------------------------------• 2 varieties• 2 packing methods

FC

CC

SM, TM

MCC or SLC

Condenser, baler

EFGS

FC

MCC

SM, TM

MCC or SLC

Condenser, baler

EFGS

Test 1 Test 2

Step 1:seed cleaning

Step 2:lint cleaning

NFCCNCCCWCCC

NCHCCWCHCC

Seed-cotton cleaner treatments

1. Modified cylinder cleaner with narrow gaps and flat, square grid bars (NFCC)

2. Modified cylinder cleaner with narrow gaps and chisel-shape grid bars (NCCC)

3. Modified cylinder cleaner with wide gaps and chisel-shape grid bars (WCCC)

Results

Source of variance

Reflectance Yellowness Leaf grade Trash area, % Uniformity,%

Cleaner treatment:

NCHLC

75.1b 8.5 3.2 a 0.040b 81.2

SLC

76.1a 8.6 3.0 b 0.035c 81.1

WCHLC

75.3b 8.5 3.3 a 0.046a 81.3

Varieties: STV4892

73.9b 9.0a 3.4 a 0.043 a 82.0a

DPL555

77.1a 8.0b 3.0 b 0.038 b 80.4b

Test 1, HVI

Source of variance Neps/g Seed coat neps/g Dust/gVisible foreign

matter, %

Lint cleaner treatments: NCHLC

289.2a 12.7 387.1ab 1.79a

SLC 260.8c 11.6 342.4b 1.31b

WCHLC 275.3b 12.1 412.7a 1.95a

Cultivar :STV4892 206.0b 14.4a 403.0 1.79a

DPL555 344.2a 9.9b 358.5 1.57b

Packing : Hand 271.0b 12.5 375.3 1.69

Pipe 279.2a 11.8 386.1 1.67

Test 1, AFIS

Source of varianceUpper quartilelength(w), cm

Short fiber content(w), %

Fineness,mTex

Maturity ratio, %

Lint cleaner treatments: NCHLC

2.90 8.48 167.8 0.869

SLC 2.90 8.41 167.9 0.870

WCHLC 2.90 8.42 167.8 0.869

Cultivar : STV4892 2.92a 7.23b 179.3a 0.892a

DPL555 2.88b 9.64a 156.4b 0.846b

Packing : Hand 2.90 8.51 168.3 0.870

Pipe 2.90 8.36 167.4 0.869

Test 1, AFIS

Seed-cotton cleaning

Source of variance

Strength, g/tex Reflectance Leaf grade Length, cm

Seed-cotton treatments:

NFCC

28.0b 75.2a 3.7a 2.76 b

NCCC 28.5a 75.0ab 3.6a 2.76b

WCCC 28.2ab 74.8b 3.4b 2.77a

Test 2, HVI

Micronaire Reflectance Yellowness Leaf grade Trash area, %

Lint cleaner treatments:

NCHLC4.4 74.8b 8.6a 3.6a 0.047b

SLC 4.4 75.5a 8.7a 3.4b 0.039c

WCHLC 4.4 74.7b 8.5b 3.7a 0.056a

Cultivars:

STV4892 4.3a 74.0b 8.9a 3.7a 0.049

DPL555 4.4b 76.0a 8.3b 3.4b 0.046

Packing :

Hand 4.4a 75.3a 8.6 3.5 0.047

Pipe 4.4b 74.7b 8.6 3.6 0.047

Test 2, HVI

Source of varianceShort fiber

content(w), %Fineness,

mTexMaturity ratio, %

Seed-cotton treatments: NFCC 8.00 167.9 0.872

NCCC 7.97 167.8 0.872

WCCC 8.17 166.8 0.868

Lint cleaner treatments: NCHLC 8.09 167.6 0.871

SLC 8.02 167.0 0.870

WCHLC 8.07 168.0 0.872

Cultivar:STV4892 6.95b 178.3a 0.892a

DPL555 9.15a 156.8b 0.850b

Packing: Hand 8.11 167.7 0.872

Pipe 7.99 167.4 0.870

Test 2, AFIS

Source of variance Neps/g Seed coat neps/g Dust/gVisible foreign

matter, %

Seed-cotton treatments: NFCC

248.6b 12.0 401.8 1.83

NCCC 253.8ab 12.9 412.9 1.86

WCCC 262.5a 13.1 399.2 1.90

Lint cleaner treatments: NCHLC

260.0a 13.0ab 423.9ab 1.95b

SLC 245.2b 11.7b 352.1b 1.55c

WCHLC 262.8a 13.4a 438.0a 2.09a

Cultivar: STV4892 205.2b 15.3a 417.1 2.06

DPL555 304.2a 10.1b 392.1 1.67

Packing: Hand 249.2b 12.7 401.4 1.87

Pipe 260.7a 12.6 407.9 1.86

Test 2, AFIS

Source of varianceLint turnout, %

Cleaner waste,kg/bale

Cleaning efficiency, %Based on visible waste

(Shirley Analyzer)

Lint cleaner treatments: NCHLC

38.3a 3.53b 34.3b

SLC 37.5b 7.97a 47.3a

WCHLC 38.0ab 3.27b 30.8b

Cultivar: STV4892 37.7b 4.34b 37.1

DPL555 38.2a 5.51a 37.9

Packing : Hand 38.1 5.05a 39.6

Pipe 37.8 4.79b 35.4

Test 1

Cleaned lint in waste, % Visible waste in waste, %

Lint cleaner treatments: NCHLC 21.3c 75.9a

SLC 47.6a 51.1c

WCHLC 27.3b 70.6b

Cultivar: STV4892 31.0b 67.0a

DPL555 33.1a 64.8b

Packing : Hand 32.7 65.2

Pipe 31.4 66.5

Test 1

Source of varianceLint turnout, %

Cleaner waste,kg/bale

Cleaning efficiency, %Based on visible waste

(Shirley Analyzer)

Seed cotton treatments: NFCC 39.57 4.65 9.80cw

NCCC 39.59 4.69 18.9b

WCCC 39.65 4.59 26.8a

Lint cleaner treatments: NCHLC

40.0a 3.16b 28.7b

SLC 39.0b 7.59a 52.5a

WCHLC 39.8a 3.19b 27.8b

Cultivar : STV4892 39.46 4.56 34.81a

DPL555 39.75 4.73 37.89b

Packing : Hand 39.69 4.66 37.48a

Pipe 39.52 4.63 35.22b

Test 2

Cleaned lint in waste, % Visible waste in waste, %

Seed cotton treatments: NFCC 31.3 67.2

NCCC 31.0 63.2

WCCC 32.1 65.7

Lint cleaner treatments: NCHLC 22.3b 74.9a

SLC 44.4a 54.1c

WCHLC 27.7b 67.1b

Packing : Hand 31.1 67.3a

Pipe 31.8 63.5b

Test 2

Conclusion

• Chisel-shape grid bars clean seed cotton more efficiently than flat, square grid bars

• Hybrid lint cleaners– Yield higher turnout (14.3 lb/bale), without

compromising classer’s grade– Loss less fiber in waste (50% of SLC)– Provide similar fiber quality, except neps,

seed coat neps and cleaning efficiency

Variety effects

• Smooth-leaf variety– Is easier to clean (low VFM)– Had higher fiber strength, reflectance, neps

and short fiber content– Had lower seed coat neps, fiber length,

fineness and maturity ratio

Seed-cotton packing methods

• No difference in trash level resulted from packing methods

• Hand packed method had higher mike, cleaning efficiency and visible waste in waste

• Packing methods did not affect fiber properties, except – Hand packed seed cotton was higher in

reflectance and lower in neps