__Solvent Extraction Plants: Requirement _____
Accidents by Human Failure
In spite of all the precautions taken in designing a solvent extraction plant, an accident can occur due to what is called human failure. This is essentially due to the lethargy on the part of the operators to observe a few well established and simple safety rules and sidetrack the same to `SAVE' some work. Therefore, the following guidelines shall be strictly enforced in a solvent extraction plant to avoid accidents due to human failure:-
  

 
Detailed Introduction

Manufacturing Process

Design Features

Safety Features
     Mechanical
     Processing
     Human Failure

Facts

Solvent Extraction

 

  1. Putting hands and limbs into running machinery is a common mode of accidents. The operators of plants shall be strictly warned that no machine shall be run without the covering of moving parts in place. Many a times operators take out the guards and covers for maintenance or repairs, but do not replace them before starting the machine. This should strictly not be allowed.
  2. The operators shall be strictly prohibited from taking any matches, candles, cigarettes, and naked flames in any form inside the solvent plant area, including preparatory section, bagging section and oil storage tanks. Warning signs in regard to the same shall be exhibited at such restricted areas.
  3. The plant operators shall be thoroughly made to understand the potential hazards involved and their causes as explained under A and B above to evolve safety consciousness in them.
  4. People who are not authorised to work in the solvent plant area shall not be allowed to enter there.
  5. 'NO SMOKING' signs shall be exhibited at as many spots as possible to repeatedly remind the people not to smoke and about the consequent fire hazard in case of smoking.
  6. Many a times the plant personnel are tempted to `Dry Clean' their clothes using the hexane available in the plant. To avoid detection they do so in the electrical cabin which is the only enclosed room available for such clandestine activity. This is most dangerous to do as there are continuous electrical sparks in the panel board and the hexane vapours generated may get ignited. There are instances of electrical cabin blowing off with the personnel inside. The plant personnel must be thoroughly educated in this regard and the hazard involved must be impressed upon them. Using hexane for washing clothes shall be totally disallowed.
  7. Normal-Hexane is a slightly toxic substance and continuous and heavy inhaling of hexane vapours can render a person `Drunk'. Therefore, no personnel shall enter the extractor or any other equipment in the plant when there are heavy hexane vapours. The equipment shall be properly desolventised before entering. In conclusion, it can be stated that if all the safety precautions enumerated above are diligently implemented, a solvent extraction plant can be as safe as or even safer then any other INDUSTRY.

 
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