Contacts

31 Proletarskaya Str.,
Volkovysk, Grodno region,
Republic of Belarus, 231900
Product realization
Head of Marketing and Sales Department - Sergey A. Sushko
Tel.: (+3751512) 4-41-50
Fax: (+3751512) 4-58-21,
Head of Marketing Bureau
Tel.: (+3751512) 4-53-21
Fax: (+3751512) 4-42-03

oxladitelj 11315 2

The mixing cooler of continuous action 11315 with the capacity of 240 m3/hr is designed to reduce automatically the temperature of the sand spent in foundries.

The mixing cooler operates according to the principle of an evaporative unit. The hot exhausted mixture flowing into the cooler is moistened and cooled by the outdoor heat of vaporization. The cooling process is intensified by a continuous mixing and blowing of the air, which removes water vapor. The air also serves as a coolant.

The temperature is reduced during the contact with the sand particles with the air and water vapor.

For efficient cooling of the mixture spent it is necessary that the air and water should be in contact with as many sand particles as much as it is reasonable. The air and water should be thoroughly mixed with the sand and the contact time should be sufficient to provide a heat transfer. Because the sand has a quite poor thermal conductivity, a heat flow from the center to the surface of the grain is relatively small.

When the water coats a grain of sand, the heat is transferred to the water film, raising its temperature up to the surface temperature of the grains. As the temperature of the water film increases, a molecular activity of the liquid increases, what results in that some of the water molecules move into a vapor state. As soon as the water evaporates, the heat should come from some other source. In this case, the heat source is the mixture spent.

A vaporization of each kilogram of water requires 536 kilocalories of heat. If the surface of sand particles has a sufficiently high temperature (above 100 ° C), the water boils, the steam pressure in this case exceeds the atmospheric pressure or is equal to it. Below 100 ° C, the rate of evaporation is less, but the constant evaporation at a slow rate still occurs.

This allows cooling of the sand to a temperature below 100 ° C. It should be noted that the lower the temperature of heat source is, the slower is the process due to the vaporization, and upon cooling below 50 ° C at a normal atmospheric temperature and pressure, the cooling becomes less effective.

The water vapor spent should be removed, to carry out further evaporation. This is done by air blowing, which carries the water vapor formed from the water-saturated mixture spent. The lower the water content is in the air, the more efficient is the removal of water vapor, and consequently, the faster the cooling process is. Furthermore, the lower the temperature is, the faster the cooling process is, since the air itself absorbs heat when heated. The low air temperature and low humidity results into more effective cooling of the mixture spent with the same contact time. In this regard, the low mixture temperature at the outlet of the coolant is achieved at various time intervals depending on day or month, or year .

The cooling equipment should perform the following operations:

1. The forced mixing of hot mixture grains spent with water to form a water film around each sand grain.

2. The mechanical stirring of the "sand-water" mixture to maintain its loose structure. The sand structure should have a weak resistance during the air penetration and be able to move easily by air.

3. The automatic water supply regulated according to the temperature of the mixture spent.

4. The forced air purging of the mixture spent, which acts as a coolant and at the same time removes the water vapor formed.

The workshop equipment maintaining the cooler should perform the following operations:

1. An air extraction from the cooler that should support a small negative pressure in the cooler, providing a clean environment.

2. A separation of solid particles falling into the air and water vapor spent.

3. A return of the separated solid particles into the system.

4. A separation and collection of the fine dust from the exhausted air and vapor and their subsequent removal.

The final temperature of the mixture spent at the outlet from the cooler will depend on:

1. the inlet temperature of the spent mixture.

2. the exposure time of the mixture spent in the cooler.

The exposure time of mixture spent in the cooler is defined under the formula (t min).:

t = (60 х В) / Q

where:

В – amount of the mixture in the cooler, m3;

Q – the cooler performance m3 / h.

The temperature of the mixture spent at the outlet is lower at a lower capacity or higher exposure of the spent mixture in the unit. The machine can cool about 240 m3 of mixture spent at temperature from 80 ° C to about 50 ° C, the throughput capacity of the unit is reduced to approximately 140 m3 / h with the desired final temperature from 40 ° C up to 70 m3 / h at 35 ° C.

Components of a cooler consist of:

1. Drive           11315.01.000B

2. Vertical shaft          11315.02.000

3. Bowl           11315.03.000

4. Hood          11315.04.000

5. Basement    11315.05.000

6. Left traverse           11315.06.000

7. Right traverse         11315.07.000

8. Atmospheric flap    11315.08.000

9. Unloading door      11315.09.000

10. Case          11315.10.000

11. Flap           11315.11.000

12. Water supply system       11311.40.000

13. Lubrication system           11311.41.000

14. Pneumatic system11311.50.000

15. Electric equipment           11311.80.000

1. Drive           11315.01.000Б

2. Vertical shaft         11315.02.000

3. Bowl           11315.03.000

4. Unloading door      11315.04.000

5. Basement  11315.05.000

6. Left traverse          11315.06.000

7. Right traverse        11315.07.000

8. Hood         11315.08.000

9. Bowing ventilation trunking         11315.09.000

10. Atmospheric flap11315.10.000

11. Water supply system        11315.11.000

12. Pneumatic system           11315.12.000

13. Lubrication system          11315.13.000

14. Electric equipment           11315.20.000

15. Stand        15108.04.200А

16. Cover       15108.16.000

Technical specifications

Amount of the mixture in a cooler, m3

до 7,4

Capacity of the unit, m3

240

Temperature the mixture spent, ° C

85

Temperature of the mixture at the outlet of the cooler, °С

50

Dimensions of the bowl, mm,

length

width

height

7210

4370

1450

Vertical shaft rotation speed, turns / min

34

Capacity of the blowing fan, m3/hour

50 000

Water pressure in the pipeline, kgf/cm2

not less than 2

Compressed air pressure, kgf/cm2

6,0

Control mode of cooler operation

adjusting, automatic

Number of electric motors in the unit

2

Drive motor power of the cooler, kW

250

Number of turns of the motor drive of the cooler, turns/min

1000

Fan drive motor power, kW

90

Number of motor turns of the fan drive, turns/min

1500

Voltage of power circuits, V

380

Frequency, Hz

50

Control supply voltage, V

220

Overall dimensions, mm,

length

width

height

12 000

13 000

5310

Total weight of the machine, kg

45 000

Axial distance between the bowls, mm

2740