CONTINUOUS-FLOWGRAIN DRYERS

TO MINIMIZE STRESS WHILE DRYING YOU MUST TREAT EACH SEED EQUALLY & ALLOW

THE PROPER RETENTION TIME

Seed TemperatureWhen drying grain the maximum kernel temperature is the leading factor that affects final grain quality. Overheating the grain within a dryer will cause damage to the final product. Some studies show that kernel temperatures as low as 140° F (60° C) will affect the overall grain quality adversely. Many purchasers of grain, especially specialty crops, insist that their grain suppliers use lower drying temperatures to eliminate heat damage to the grain. This is because they realize with most dryers the grain is heated unevenly. Although some of the grain in a standard dryer never exceeds the critical kernel temperature, much of it goes way above, and that grain gets damaged. Lowering the drying temperature in an attempt to maintain grain quality, in a typical dryer adversely affects the efficiency and capacity of the dryer as well.

The NECO dryer eliminates this disparity in drying, treating all kernels evenly to the heated air, not letting any kernels spend too much time directly exposed to the heated air. This results in higher quality grain with less stress cracks, no heat damage, and higher test weight.

Retention TimeGrain is normally dried by passing heated air though it. This air has the opportunity to flow around each kernel. Because the air is heated it starts out with a very low relative humidity, meaning it has the ability to absorb moisture. As the air flows through the grain it

absorbs moisture from within the kernel. As the moisture evaporates it cools the kernels much like the cooling effect when moisture is evaporated off you skin in the summer. Because of this evaporative cooling effect, the wetter kernels never approach the temperature of the heated air. As the grain gets drier less evaporation occurs around the kernels and so the grain temperature moves closer to the air temperature. With a typical cross flow dryer (screen dryer), the same grain is next to the heat all the way though the dryer so it gets over dried (thus over heated) while the grain on the other side of the grain column never gets exposed to the hottest air so it is under dried. This can have a devastating effect on grain quality, efficiency, and capacity of the dryer.

MIxed-Flow DryersWith a NECO dryer the grain is constantly moving past a series of unique hot air ducts. This grain is constantly moving in and out of the hottest air, so all the grain gets a chance to be exposed equally to the hottest air. Furthermore the gentle mixing and loosening of the grain as it flows around these ducts insures that the grain is dried evenly and that airflow through the grain is increased, enhancing the efficiency and capacity. None of the grain in a NECO dryer is over dried or under dried. Kernel temperatures in a NECO dryer remain low for all the grain, meaning higher grain quality, better efficiency, no heat-damaged grain, lower stress cracks, and higher test weights. Simply put the NECO grain dryer offers a better way to dry grain!

GRAIN DRYING PRINCIPLES

Printed in U.S.A. BAC 01/06/33079

A Division of GLOBAL Industries, Inc.9364 N. 45th Street • Omaha, NE 68152

Phone: (402) 453-6912 • Fax: (402) 453-0471Web Site: www.necousa.com E-Mail: sales@necousa.com

See Your NECO Dealer:OMAHA

MADE IN USA

NECO COMMERCIAL GRAIN DRYER SPECIFICATIONS NECO

COMMERCIAL DRYERS

NO

. OF

TIER

SHO

LDIN

G C

APAC

ITY

(BU

)

CORN

ALL

HEA

T 22

-17

(210

°)

CORN

ALL

HEA

T 25

-17

(210

°)

CORN

DRY

AN

D CO

OL

20-1

5 (2

10°)

CORN

DRY

AN

D CO

OL

25-1

5 (2

10°)

WHE

AT D

RY A

ND

COO

L 19

-14

(210

°)

TOTA

L CF

M O

F BL

OW

ERS

(CO

RN)

MAX

BU

RNER

OU

TPU

T (B

TU/H

R)

MAX

UN

LOAD

(BPH

)

TOTA

L HP

OF

BLO

WER

(S)

DISC

HARG

E AU

GER

HP

TOTA

L HP

OF

ALL

MO

TORS

FILL

HT.

W/ G

RAVI

TY F

ILL

3 (F

T)

OVE

RALL

LEN

GTH

(FT)

DRYER MODEL1

DRYING CAPACITY2 (BPH) MOTOR INFORMATION DIMENSIONS4

2000 BPH MODELS

D24210 12 2020 2194 1443 1913 1072 1722 82,500 13.5M 2860 60 7.5 67.5 35.9 35D32210 9 2116 2202 1450 1951 1756 1029 82,500 13.5M 3820 60 7.5 67.5 32.6 43 3000 BPH MODELS

D24320 19 3029 3353 2197 3008 1645 2707 123,500 22.5M 4230 100 10 110 49.9 35D32300 14 3078 3380 2222 3015 1677 2714 127,000 21M 3820 100 10 110 42.6 43 4000 BPH MODELS

D24380 24 3750 4218 2762 3791 2112 3412 155,500 28.5M 5660 120 15 135 59.9 35D32440 20 4232 4797 3150 4194 2370 3775 180,000 30M 7550 150 15 165 54.6 43D40430 16 4328 4602 3007 4052 2302 3647 166,000 32M 7050 130 15 145 49.2 51 5000 BPH MODELS

D32500 24 5001 5749 3774 5160 2884 4644 216,000 36M 7550 180 15 195 62.6 43D40530 20 5289 5687 3710 5153 2798 4638 204,000 40M 7050 160 15 175 57.2 51D48550 17 5482 5729 3733 5062 2862 4556 224,000 46M 8450 190 15 205 53.9 61 6000 BPH MODELS

D40630 24 6251 6957 4550 6087 3477 5478 256,000 48M 9430 200 20 220 65.2 51D48660 21 6636 7106 4633 6265 3499 5639 280,000 56M 11,320 210 20 230 61.9 61 7000 BPH MODELS

D48750 24 7501 8113 5289 7291 4040 6562 320,000 64M 11,320 240 20 260 67.9 61

1 This is a representative sample of some of the high-capacity models offered by NECO. Dryers can be special ordered to meet customer specifications.

2 Drying capacities represent NECO’s best estimate of attainable wet bushel capacities based on a combination of actual field results and computer analysis. Capacities will vary depending on outside temperature, humidity, initial grain temperature, crop maturity and variety, cleanliness of the grain, test weight, operating temperature, drying vs. cooling zones, etc.

3 Fill height listed is for a dryer with a 24” leg kit installed. Add 16” for a 40” leg kit, and 24” for a 48” leg kit.

* All U.S. dryers have an overall width of 8’ 3”. Dryers shipped internationally have an overall width of 7’ 7-1/2”

COMMERCIAL GRAIN DRYERSENERGY EFFICIENT • PRESERVES THE QUALITY OF THE GRAIN • TOTALLY AUTOMATED

Grain is introduced into the top of the dryer where a leveling auger spreads the grain across the garner bin of the dryer. An optional gravity fill system is also available.

Belt driven forward curved centrifugal fan(s) quietly and efficiently deliver large quantities of air into the dryer.

A highly efficient Maxon® burner heats the air, which lowers its relative humidity, allowing it to carry away more moisture. Modulating controls regulate the gas flow, providing a uniform air temperature.

An adjustable baffle allows you to divert some air around the burner to provide cooling within the dryer, if desired. You can adjust the amount of air dedicated to cooling the grain while maintaining as much air as possible dedicated to drying. This feature also allows you to convert quickly and easily to an all heat dryer.

An extra large transition efficiently introduces the air into the plenum.

Inlet ducts are open inside the plenum to allow the heated air to enter. The bottoms of these ducts are open to allow this air to enter the grain. Because of the unique design of these ducts, although the grain surrounds them, it will not flow out. No performance robbing screens are necessary to hold the grain in and block with fines and trash.

Outlet ducts are staggered at an efficient distance to allow for air movement through the grain. These ducts are similar to the inlet ducts except they are open on the bottom and the outside of the dryer to allow the moisture-laden air to leave the dryer.

A moisture sensor is located within the grain column to monitor the moisture as the grain flows through the dryer.

A set of four, fluted metering rolls are turned by a 90 volt DC motor to meter the flow rate through the dryer. Speed of these rolls is automatically controlled by the moisture sensor, which changes the rate at which the grain is discharging from the dryer depending on the moisture reading it obtains from the grain as it flows through the dryer.

Discharge augers run under the dryer collecting the grain coming out of the metering rolls and moving it to the rear of the dryer.

A cross auger at the back of the dryer collects the grain from the two discharge augers and drops it out for transfer into storage. This auger can be provided to discharge out of either side or out the center of the dryer.

HOW THE NECO SCREENLESS DUCT DRYER WORKS

A

B

C

D

E

F

G

H

I

J

K

The unique shape of the ducts hold the grain in without dependence on the hole size, so no special screens are required when drying small seed crops.

The Maxon® burners used in the NECO dryer are extremely efficient. The wide area they cover and short flame length combine to provide equal to heat distribution to all the air throughout the entire dryer. This means faster, more efficient drying with the lowest moisture differential possible throughout the entire dryer.

An electronic moisture sensor is located in the grain. This sensor measures the actual moisture content of the grain as it flows through the dryer. Depending on whether the grain is wetter or drier than desired, it either slows down or speeds up the rate at which grain is discharged from the dryer.

Smart Processing Systems

“In the future, dryers will be designed, built and operated differently as well. Smart processing systems will automate many manual tasks and make it easier for operators to track performance of their dryers more closely. Temperatures, moisture contents, grain quality, and grain flow will be automatically controlled, and records including weather conditions and fuel consumption will be linked directly with the company database.”

WARNING-as with any moving machinery, KEEP HANDS, FEET & LOOSE CLOTHING AWAY FROM ALL MOVING PARTS. Disconnect and Lock Out Power before servicing the grain dryer.

NECO reserves the right to change specifications without notice.

THE FUTURE IS HERE…

NECO’s Optional PLGC System

ProgrammableLogicGraphicControl

The PLGC system is a simple, user friendly touch screen that is capable of controlling your entire grain handling system from one central screen. Our PLGC is capable of receiving commands, and sending Alerts through internet, cell phone, and land line. These options represent only a fraction of the capability the PLGC offers. This is just another example of innovation from the industry leader in Commercial Grain Drying, NECO.

• The NECO multi-blade fan provides maximum air output with minimal energy consumption.

• A belt drive allows us to customize the speed of the fan to match the performance required to dry grain efficiently and fast.

• The forward, curved blades used in the NECO dryer literally scoop the air up and propel it through the grain with just the right velocity to provide maximum drying output.

• The NECO fan is designed to produce high air flow at a low speed, reducing vibration. This allows a longer life expectancy from all components of the dryer and easier starting of motor on start up

• The NECO dryer has a large holding capacity. This feature allows the grain to spend more time in the dryer, allowing it to dry in a more natural manner.

• Servicing is easier with hinged belt guards and quick release latches on the control box. Diagnostic lights pinpoint the reasons for safety shutdowns.

• In the NECO dryer, all the grain moves in and out of the hottest air several times during its passage through the dryer. As a result of this unique NECO duct system, all kernels are dried evenly avoiding stress cracking, discoloration or chalking of grain. Test weight and quality of the grain are maintained.

• A complete clean out of the dryer with the flip of a lever. Every kernel falls free to avoid contamination of grain. Dr. Dirk E. Maier, Ph.D., P.E.

Purdue UniversityAndDr. Fred W. Bakker-Arkema, Ph.D.Michigan State University

Grain Drying Systems

July, 2002, page 9