Evaporators

By Eve Visconti

Evaporators are machines used to change liquids into gases, and consist of a heat exchanger, manifold, and temperature control mechanism. These machines vary in terms of how fast they work, and how much they can hold. They may be fueled by electricity, oil, hot water, natural gas, liquid propane, or steam. There are several types of evaporators, including:
  • Atmospheric

  • Plate

  • Thermal

  • Short Path.


  • How Do Evaporators Work?

    Evaporation is the process by which a toxic liquid – often water, is heated to the boiling point in order to convert it into steam to dispose of harmful materials such as soaps, metals, or oils, which must be disposed of safely. After creating steam, the evaporator machine carries off the steam by means of a mist eliminator, which collects the contaminants, and reconverts the steam into fresh, uncontaminated water. The process begins with the liquid being collected in a holding tank, where it is then pumped or gravity fed into the evaporator as it is being gradually heated to the boiling point. As steam is released, more liquid is being fed into the evaporator through the holding tank, creating a continuous stream of liquid and steam release process. The steam created is then blown out through the mist eliminator, producing high quality distilled water, which is then re-circulated through the system.

    Evaporator Applications

    Evaporators have a wide variety of uses in a number of industries. For example, evaporators are used in processing alcohol, chemicals, and foods. Some of these devices are used in cryogenics (freezing), for desalinization of seawater, and in the petroleum industry for recovering gas, recycling of liquids, and offshore drilling.

    Evaporators are also used in the production of plastics, in the pharmaceutical industry, in pulp and paper manufacturing, in the semiconductor industry, and in wastewater treatment. Wastewater is present in many manufacturing and industrial settings, and therefore, has to be managed properly. Evaporating machines are commonly used in a wide variety of applications, in dealing with, for example: mop water, die cast waste, machine coolants, acid cleaners, etching compounds, heavy equipment cleaning, floor scrubber wastewater, landfill leachate, aircraft washing and deicing, printing waste, storm runoff, film processing waste, steam cleaning, and many other uses for waste management and controlling environmental pollution.

    Need for Evaporators

    When one is in a situation where wastewater disposal is a problem, whether it is a company or residence, an evaporator can be very useful. Indicators of such problems include:
  • Paying too much for wastewater disposal.

  • Having difficulty with keeping wastewater within specific limits of local sewage treatment facilities.

  • Being in a rural area that lacks adequate sewage disposal mechanisms.