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The procedure for storage of raw cotton

06.12.2020

Proper drying and storage of harvested raw cotton is one of the important factors. Proper execution of this process has a definite effect on the quality of the fiber. Drying of cotton can be done in different places. Examples include vacant lots, open spaces, and covered buildings. If the cotton is not dried and stored wet, some shortcomings may occur:

  • Fever occurs;
  • Due to the heat, the fiber weakens and breaks;
  • The color of the fiber turns yellow;
  • The fibers stick together and take the form of washing.

Raw cottonseed is dried until the humidity drops to 10 percent. In the normal procedure, raw cotton is dried by rolling it 10 cm thick or turning it into a yaba. If the cotton crop is harvested in rainy weather, it is dried, especially in buildings with drying facilities. The temperature in these buildings can be 60-800C. If the specified temperature is higher than this norm, the product can be heated and fried. Drying of seed cotton is different. If the moisture content of the seed cotton is high, it is better to dry it in the sun. If dried in special buildings, ie up to 600 C, the straw will lose its ability to germinate and become unsuitable for sowing.

The following should be taken into account for the quality of raw cotton to be processed:

  • Raw cotton should not be stored in open warehouses or in open bags. In this case, dust enters the cotton and pollution occurs. Moreover, cotton stored in this way absorbs moisture and the quality of the fiber deteriorates;
  • The building where the raw cotton is stored for both fiber and seed purposes must be properly selected;
  • The walls, floor and ceiling of the selected building should be made of suitable material to ensure that raw cotton does not transmit moisture and heat. The ceilings of the warehouses should be covered with tar, willow and wood;
  • Raw cotton should be dried and stored in warehouses or covered sheds;
  • The pedestal of the warehouses must be at least 25 cm above the ground;
  • The ceiling of the shed should be made of concrete or heat-resistant material;
  • Fire safety should be considered in areas where cotton is stored;
  • If cotton is stored for seed, the relative humidity of the storage should not exceed 75 percent. Humidity in the raw material should not exceed 10 percent. If the storage environment is not suitable, diseases can occur and the product can spoil;
  • If the temperature in the warehouses rises and the cotton becomes hot, ventilation systems should be activated. Therefore, quality ventilation systems must be installed in warehouses.