BSHM-16
BSHM-16

Screen grain cleaner and separator BSHM-16 (cleaning/screening machine) is designed for cleaning of grain (wheat, rye, oat etc.) from foreign matters (impurities) that are differ by geometrical dimensions and aerodynamic qualities. Separator also serves for grain mixture fractionation. The machine is operated within grain storages, at flour milling plants and groats mills.

Parameter title

Value

 Technical capacity for wheat and rye with moisture content max. 15% and foreign impurities content max. 3%:

- pre-cleaning (receiving cleaning process), tons per hour

- main cleaning (industrial cleaning process), tons per hour


66

16

Efficiency of cleaning from foreign impurities for wheat and rye with moisture content max.15% and foreign impurities content max.3%:

- pre-cleaning %, min.

- main cleaning %, min.


20

75



Screen grain cleaner and separator BSHM-16 (cleaning/screening machine) is designed for cleaning of grain (wheat, rye, oat etc.) from foreign matters (impurities) that are differ by geometrical dimensions and aerodynamic qualities. Separator also serves for grain mixture fractionation. The machine is operated within grain storages, at flour milling plants and groats mills.


Separators are produced in accordance with third category of GOST-15150 (IEC 60721-2-1; IEC 60068-1), climate version U for internal market and export to temperate countries. However, separators have to work reliably in operating regimes at a temperature from 10 () degrees below zero to 40 () degrees above zero, relative moisture 80% with average annual temperature of 15 () degrees above zero, atmospheric pressure from 650 to 800 mm Hg (86,6÷106,7 kPa).


Specifications

Parameter title Value

1

Technical capacity for wheat and rye with moisture content max. 15% and foreign impurities content max. 3%:

- pre-cleaning (receiving cleaning process), tons per hour

- main cleaning (industrial cleaning process), tons per hour


66

16

2

Efficiency of cleaning from foreign impurities for wheat and rye with moisture content max. 15% and foreign impurities content max. 3%:

- pre-cleaning %, min.

- main cleaning %, min.


20

75

3

Rated capacity kW, min.

0,74

4

Body vibration frequency, open-circuit: 

-1 (vibrations per minute)

15,66

940

5

Body vibration amplitude (motion), mm

5÷5,5

6

Body inclination angle, degree:

- pre-cleaning

- main cleaning


10

6

7

Vibrator setting angle, degree:

- pre-cleaning

- main cleaning


25

20

8

Air consumption for aspiration m3/hr, max.:

5600

9

Overall dimensions (with pneumatic duct) mm, max.:

   length

   width

   height


2700

1690

1856

10

Weight kg, max., including:

- separator

- aspiration channel

690

570

120

11

Average time between failures, hours, min.

1000

12

Service life, years

8

* For cleaning of other plants, different from wheat, the capacity reduces in the following way:

for rye and corn by 90%;

for panic grass and barley by 80%;

for buckwheat and oat by 70% of rated.


Separator technical capacity reduces with increasing of grain moisture and impurities content:

with moisture 15-18% goes down to 65-70%;

with moisture 18-22% goes down to 55-60%;

with moisture above 22% goes down to 50% of rated.

Structure and Functioning


Fractional separator with aspiration channel BSHM-16 (fig.1) consists of separator for coarse and fine impurities removal and fractionation of grain mixture, and aspiration channel for light impurities and dust removal. Separator consists of the following parts: frame, receiver, body with screen frames, outlet unit.


Body 2 is attached to the frame 1 (fig.1) through rubber mounts 8 by fixing brackets 5 and 6. Clamp plates 9 and screw-bolts 7 provide an opportunity to fix the body in the required position. Body inclination angle may vary from 0 to 10 and is controlled on scale 10 by the position of fixing bracket 6 lower flange.


The receiver is represented by distributor 14, two nozzles 16 fixed on traverse 11 and pillars 12, two sleeve filters 3, two nozzles on the body and distributor 15 inside the body for constant discharge of sort product.


The body is a housing made of sheet metal with bottom plate. Inside the housing on the welded slideway railings three layers of screen frames are installed. Screen frames are pairwise connected to each other (front and rear) in the second and third layers. Upper frames 17, 18, 29 are equipped with screens, which holes size depends on operating regime (receiving cleaning process or industrial cleaning process) and product, lower screens 19 and 20 with holes 1,720. Cleaning of screens is provided by rubber balls. Recommended screens sizes are specified in the attachment. Screen frames are fixed by clamps 21 inside the body.


Electrovibrators 23 are secured with turnplates 22 with scale, which are installed on the side walls of the housing. Electrovibrator setting angle is controlled on scale 27 relative to pin 30 on the body sidewalls. Pin position on the body must correspond the mark 25 on the plate scale for pre-cleaning and 20 for main cleaning. Top wall of the housing is equipped with cover 24.


Outlet unit is represented by box made of metal sheet with internal baffles, which form trays for the outlet of different product fractions (fig.2). 


Aspiration channel 3 (fig.1) consists of the housing made of metal sheet with upper and lower flanges. Port holes with end and side seals are placed at the front part of the housing for product supply. Shutter 25 for air supply regulation and shifting transparent wall 26 are placed inside the housing. Designation of the aspiration channel is separation of light impurities.


Operational concept of the separator lies in fractionation of initial grain mixture by stage screening through three screen layers, which make reciprocating oscillatory movements, and separation of light impurities and dust from coarse fraction by its transferring through upward air current in aspiration channel.


Technological process is shown at fig.2. Initial grain mixture enters to the first layer screen through inlet nozzles 1 and sleeve filters 2, coarse impurities (that failed to come through screen) are removed from the separator through first layer trays. Product from the first layer enters to the body distributor 3 and second layer screens 4. Product from the second layer enters to the third layer 5, coarse impurities (that failed to come through screen) are removed from the separator through upper nozzle of outlet unit 6. Grain is fractionated on the lower screen. Large grain (that failed to come through screen) through duct 7 enters to the aspiration channel 8, small grain (that came through screen) is removed through tray 9. In the aspiration channel grain is blown-out by upward air current, cleaned from light impurities and dust and transferred for further processing in accordance with technological process.


ATTENTION! Screens selection is carried out by the consumer at worksite depending on feedstock and its characteristics (moisture, impurities content, grain particle size etc.) for the purpose of obtaining the required cleaning standard.


ATTENTION! To prevent arching of tailings on the body bottom plate during sunflower cleaning, it is necessary to remove the protective layer of the primer coat on the inner surface of the bottom plate.


RECOMMENDED SCREENS CHARACTERISTICS FOR CLEANING OF DIFFERENT CROPS

CROP

Receiving cleaning process

Industrial cleaning process

Upper (preliminary) screen

Lower (main) screen

Upper (preliminary) screen

Lower (main) screen

Wheat

Ø10÷8

1,7220(16)

Ø2÷2,5

Ø7÷5

3420(16)

1,7220(16)

Ø2÷2,5

Rye

Ø10÷8

1,7220

Ø2÷2,5

Ø7÷5

3420

1,7220

Ø2÷2,5

Barley

Ø10÷8

22,420

Ø2,5

Ø8÷4,5

44.520

22,420

Ø2,5

Oat

Ø10÷8

1,72,220

Ø2,5

Ø8÷6

3420

1,72,220

Ø2,5

Rice 

Ø10÷8

Ø2,5÷3,5

Ø6,5÷5,5

2,83,620

Ø2,5÷3,5

Buckwheat

Ø8÷7

22,420

Ø3÷3,6

Ø6÷5

22,420

Ø3÷3,6

Panicgrass

Ø8÷6

1,41,620

Ø4÷3

22,220

1,41,620

Pea

Ø10÷8

2,7420

Ø5÷5,5

Ø10÷8

2,7420

Ø5÷5,5

Sunflower

Ø10÷8

1,7320

Ø3,5

Ø10÷6

1,7320

Ø3,5

Maize

Ø12÷10

3520

Ø6÷5,5

Ø12÷10

3520

Ø6÷5,5

Notice 1. If necessary, the elongated holes can be replaced by round ones and in reverse, taking into account the following formula:

 

=(0,700,75)d,

with  width of elongated hole; d internal diameter.

 

Notice 2. To obtain the required cleaning standard and capacity screens selection is carried out by the consumer individually at worksite as dimensional characteristics of the same crop may differ depending on variety and growing area.