Forced Circulation Evaporator Manufacturer India Bangladesh Nepal Iran Dubai Nigeria Kenya

Ylem Parto design, manufacture forced circulation evaporator. Forced circulation evaporators are used if boiling of the product on the heating surfaces is to be avoided due to the fouling characteristics of the product, or to avoid crystallization. The flow velocity in the tubes must be high, and high-capacity pumps are required.

The circulating product is heated when it flows through the heat exchanger and then partially evaporated when the pressure is reduced in the flash vessel (separator). The liquid product is typically heated only a few degrees for each pass through the heat exchanger. To maintain a good heat transfer within the heat exchanger it is necessary to have a high recirculation flow rate.

This type of evaporator is also used in crystallizing applications because no evaporation, and therefore no concentration increase, takes place on the heat transfer surface. Evaporation occurs as the liquid is flash evaporated in the flash vessel/separator. In crystallizer applications this is then where the crystals form, and special separator designs are used to separate crystals from the recirculated crystal slurry. More information about crystallization is available in the crystallization section.

The heat exchanger (in evaporator parlance sometimes called the "calandria") can be arranged either horizontally or vertically depending on the specific requirements in each case.
 

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Multiple Effect Evaporator Manufacturer India Iran Bangladesh Nepal Africa U.K

Multiple Effect Evaporator (Triple Effect/ Double Effect/ Single Effect Evaporator)
Ylem Parto design, manufactures Multiple Effect Evaporator 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. Because the boiling point of water decreases as pressure decreases, the vapor boiled off in one vessel can be used to heat the next, and only the first vessel (at the highest pressure) requires an external source of heat. While in theory, evaporators may be built with an arbitrarily large number of stages, evaporators with more than four stages are rarely practical.

It has become widely used in all industrial applications where large volumes of water must be evaporated, such as salt production and water desalination.

The evaporation remains basic process for a concentration of solutions in spite of significant competition of different bro-membrane processes. The processes of evaporation are used in the different branches of industry - from food industry to chemical industry, in which evaporation is a widespread technological process. Theoretically, the multiple-effect evaporators allow to decrease consumption of energy for a concentration almost proportionally to number of effects .

Evaporators are used for reducing product volume, remove water prior to drying, and to improve product storage life.

Evaporation is a highly energy-efficient way of removing water or other liquids and thus the primary process for the production of concentrates. Process time can be shortened by distributing the liquid to a greater surface area, or by using a higher temperature. Higher temperatures combined with longer residence times can, however, cause degrading of many foodstuffs.

Typical evaporator applications:

• Product concentration
• Dryer feed pre-concentration
• Volume reduction
• Water / solvent recovery
• Crystallization

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