Common questions

How does a vacuum pan work?

How does a vacuum pan work?

Working principle :

  1. At pan stage, syrup from evaporators gets converted to crystal sugar.
  2. Process involves charge of syrup taken into vacuum pan and again boiled that leads to introduction of very fine “seed” crystals.
  3. With due evaporation of water, fresh syrup is added with sugar deposited on seed.

Why vacuum is used in evaporator?

The vacuum evaporation treatment process consists of reducing the interior pressure of the evaporation chamber below atmospheric pressure. This reduces the boiling point of the liquid to be evaporated, thereby reducing or eliminating the need for heat in both the boiling and condensation processes.

What is a vacuum pan?

: a tank with a vacuum pump for rapid evaporation and condensation (as of sugar syrup) by boiling at a low temperature.

What were vacuum pans used for?

a vessel equipped with a vacuum pump used for rapid evaporation by boiling a substance at a low temperature under reduced pressure.

Does a vacuum decrease pressure?

Other things equal, lower gas pressure means higher-quality vacuum. For example, a typical vacuum cleaner produces enough suction to reduce air pressure by around 20%.

What products come from a vacuum pan?

After being evaporated in a multiple-effect evaporator to a syrupy con- sistency, clarified juice must be evaporated further for the sugar to crystal- lize. This is accomplished in a vacuum pan, a vessel in which syrup is boiled under vacuum to form a heavy mixture of crystals and mother liquor, called massecuite.

When was the vacuum pan invented?

1845
Rillieux’s invention offered a safer and more lucrative alternative. In 1845 the first factory-scale evaporation system went into operation. Rillieux’s machine functioned as a closed system….Additional Data.

Entry Published July 29, 2013
Coverage 1806–1894
Category History
Topics
Regions Greater New Orleans

What do you understand by multiple effect evaporator?

A multiple-effect evaporator, as defined in chemical engineering, is an apparatus for efficiently using the heat from steam to evaporate water. In a multiple-effect evaporator, water is boiled in a sequence of vessels, each held at a lower pressure than the last.

How much water does a vacuum pan evaporate?

The ordinary form of vacuum pan evaporates about 8~ lbs. of water per pound of coal, but it is said that the best forms of Yaryan apparatus evaporate from 23t to 25 lbs. of water per pound of coal in a triple effect, and 30t lbs. in a quadruple effect.

How does the vacuum evaporation treatment process work?

The vacuum evaporation treatment process consists of reducing the interior pressure of the evaporation chamber below atmospheric pressure.

What is the purpose of a vacuum evaporator?

Vacuum evaporators are used in a wide range of industrial sectors to treat industrial wastewater. It represents a clean, safe and very versatile technology with low management costs, which in most cases serves as a zero-discharge treatment system.

Which is the most efficient method of vacuum evaporation?

A very efficient method of vacuum evaporation is that obtained. by the use of Multiple Effect Systems. In these greater economy of fuel for heating is secured.