Subdual of stationary thresher machine for chopping resudies

Diffirent treatm ent.

E

n

e

rgy

 r

e

qui

re

m

e

nt (k

W

)

rice straw

cotton stalks

corn stalks

0

5

10

15

20

25

30

35

4 c

m

2

6 c

m

2

8 c

m

2

13.1

m/

s

15

.7

1

m/

s

18

.3

2

m/

s

0.5

ton/h

1 t

on/h

1.5

ton/h

6

.50%

10

.20%

14

.30%

3 c

m

4 c

m

5 c

m

oval slots

drum speed

feed rate

moistue contant

concave

clearance

Different treatm ent.

E

n

e

rgy

 r

e

qui

rm

e

n

t(

k

W

.h

/t

on)

rice straw

cotton stalks

corn stalks

straw, from 27.5 to 40.9 kW and from 18.3 to 27.3 kW.h/ton of cutting 

cotton stalks and from 25.2 to 38.7 kW and from 16.8 to 25.8 kW.h/ton 

of cutting corn stalks whenever the feed rate was increased from 0.5 to 

1.5 ton. 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fig.(7):the relation between power consumption and different factors. 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fig.(8): the relation between energy requirement and different factors. 

So, The power consumption  and energy requirement  were increased 

from 23.2 to 36.2 kW and from 15.2 to24.1 kW.h/ton of cutting rice 

---

 Misr J. Ag. Eng., July  2007 

  

                            

                                                        

 

 

518 

straw, from 20.9 to 34.3 kW and from 13.9 to 22.9 kW.h/ton of cutting 

cotton stalks and from 18.5 to 32.6 kW and from 12.3 to 21.7 kW.h/ton 

of cutting corn stalks, whenever the moisture content was increased from 

6.5 to 14.3% .  

Also, The power consumption  and energy requirement  were decreased 

from 22.5 to 18.2 kW and from 15 to 12.1 kW.h/ton of cutting rice straw, 

from 20.1 to 16.5 kW and from 13.4 to 11 kW.h/ton of cutting cotton 

stalks and from 18.5 to 14.8 kW and from 12.3 to 9.9 kW.h/ton of cutting 

corn stalks, whenever the oval slots area was increased from 4 to 8 cm

2

 .  

The power consumption and energy requirement  were decreased from 

26.9 to 22.2 kW and from 17.9 to14.8 kW.h/ton of cutting rice straw, 

from 22.9 to 18.6 kW and from 15.3 to 12.4 kW.h/ton of cutting cotton 

stalks and from 20.8 to 16.9 kW and from 13.9 to 11.3 kW.h/ton of 

cutting corn stalks, whenever the concave clearance was increased from 3 

to 5 cm . 

The evaluation of power consumption and energy requirement were at 

1.5 ton/h feed rate of rice straw , cotton stalks and corn stalks. It could be 

remarked that the power consumption and energy requirement for cutting 

rice straw were higher than that for cutting cotton stalks and corn stalks. 

This may be due to the difference in physical and mechanical properties 

of different residues.