Product Description

The management of wastewater is a regulated and meticulously controlled process. Manufacturers of wastewater evaporators collaborate closely with governmental agencies to facilitate the safe removal of hazardous industrial waste.

A wastewater evaporator utilizes thermodynamics and mass transfer principles to eliminate water from waste materials. Thermodynamic evaporation involves heating the waste material sufficiently to vaporize water using various fuel sources.

Once water vaporizes, it is transferred as droplets via a blower without filtration.

Wastewater evaporation is an effective method for concentrating liquid waste and removing contaminants such as salts, heavy metals, and hazardous materials. Compared to solar evaporation ponds, which occupy large land areas and work slowly, wastewater evaporators are significantly more efficient.

Types of Wastewater Evaporation

Boiler Blow Off Evaporator, Boiling Water in a Tank, Heat Exchanger Evaporator, Liquid Thermal Oxidation, Steam Tube Evaporator, Vacuum Wastewater Evaporator

Feed

Wastewater is introduced into the treatment tank from a holding tank in the required quantity.

Feed Pump

The wastewater feed pump transfers wastewater into the wastewater evaporator, operating either manually with a toggle switch or automatically through an autofill system.

Heat

The wastewater evaporation process relies on heated steam generated by a heat exchanger, enhancing vaporization and concentration. Heat within the evaporator creates a uniform boil across the solution's surface.As the temperature reaches optimal levels for waste concentration, the evaporator prompts the need for emptying.

Blower

The blower in a wastewater evaporator draws air into the evaporator tank to eliminate water vapors and aid in the heating process. In the unit below, the blower compartment is visible in the lower right corner.

Compressor

Compressors play a crucial role in the vaporization process and can be categorized as positive displacement, centrifugal, or axial. Wastewater evaporators equipped with a compressor require an external steam source, such as a boileror heater in the feed tank.

Mist Eliminator

The mist eliminator, also known as a mist pad, removes contaminants from the process, which may include oils or other substances. Constructed from corrosion-resistant materials, these eliminators can be designed to be self-cleaning for enhanced efficiency.

Heat Production in a Wastewater Evaporator

Gas

The burner ignites within the combustion chamber, directing hot gases through a chimney into the evaporator tank. This process heats the wastewater to its boiling point.

Electric

Electrically powered units feature a heat exchanger located within the wastewater evaporator tank to generate heat for the wastewater.

Oil

Wastewater evaporators powered by oil operate similarly to gas models but use oil as their fuel source. The oil combusts within a combustion chamber, then travels through tubes in the heat exchanger before entering the chimney, where it mixes with air to heat the evaporation tank.

Steam

Steam heats the coils of the heat exchanger. Upon condensation, heat transfers to the wastewater and is discharged, releasing vapors through the mist eliminator.

Uses for Wastewater Evaporators

Food industry

Wastewater evaporators find numerous applications in the food industry. While wastewater from food production is non-toxic and biodegradable, it does contain biochemical oxygen demand (BOD) and solids from various processed foods. Activities like vegetable washing and animal slaughter introduce dissolved organic materials that must be eliminated from water before it can be reused or discharged.

Pharmaceutical

The pharmaceutical industry demands clean water as chemists require pure water for drug manufacturing processes. Regulatory agencies establish stringent purity standards for water used in drug production. Contaminants generated during pharmaceutical manufacturing are hazardous and pose risks, underscoring the necessity of wastewater evaporation equipment.

Paint Production

Water plays a crucial role in paint manufacturing, used in both water-based paints and for cooling ball mills in oil-based paint production. Wastewater from paint production typically contains elevated levels of alkaline substances from cleaning processes and cooling towers. Although the volume of wastewater from paint production is small, it is highly concentrated with pollutants.

Benefits of Wastewater Evaporators

Energy Efficiency:Wastewater evaporators operate on a 1:1 ratio, meaning the energy used to extract water equals the water extracted. Efficiency can be further enhanced by employing multiple effects, such as utilizing steam from one operation for another.

Zero Liquid Discharge:Stringent regulations at national, state, and local levels necessitate minimal industrial wastewater discharge. Wastewater evaporators can achieve zero liquid discharge, exceeding regulatory requirements.

Total Dissolved Solids (TDS):Wastewater processed by evaporators typically yields TDS levels below 10 mg/L, often as low as 2 mg/L. This purity allows the treated water to be reused in manufacturing processes.

Cost Effectiveness:Compared to chemical precipitation systems processing 395 liters per minute (L/m), wastewater evaporators are more efficient at 190 L/m, offering significant cost savings.

Flexibility:Wastewater evaporators are adaptable to diverse industry needs and wastewater conditions. They can be customized to handle various contaminants effectively.

Volume Reduction:A key advantage of wastewater evaporators is their capability to drastically reduce waste volume by removing moisture from materials. This addresses challenges in waste management by minimizing required disposal space.

Integration:Wastewater evaporators can operate independently or integrate seamlessly into existing systems, enhancing operational efficiency and reducing costs in wastewater disposal processes.