Product/Service

Landa introduces new high-efficiency wastewater evaporation technology

Source: Landa Water Cleaning Systems
A revolutionary new technology, with 100% heat transfer, has been introduced in a new line of industrial wastewater evaporators by Landa, a manufacturer of water cleaning systems near Portland, Oregon
A revolutionary new technology, with 100% heat transfer, has been introduced in a new line of industrial wastewater evaporators by Landa, a manufacturer of water cleaning systems near Portland, Oregon.

The technology, called Submerged Combustion, is used in Landa's Water Blaze, a series of wastewater evaporators that can realize as much as 30% in energy savings often resulting in operational costs of under 5 cents per gallon.

Evaporation is widely used to minimize waste disposal costs and liabilities by reducing the water content--as much as 95% in some cases--of a wastewater stream.

Conventional evaporators use heat exchangers to "cook" off a tank of contaminated wastewater--like boiling a pan of water on a hot stove. As much as 30% of the heat generated by these systems escapes out the exhaust flue or is lost in heat transfer.

The Water Blaze is designed so that all of the heat goes directly into the water for higher efficiency and lower cost. Here's how it works:

  • A turbo-burner, fueled by natural gas (or propane) and fanned by compressed air, super heats the wastewater and causes instant vaporization.

  • The heat rushes down from the burner through a sparger tube directly into the water tank of the Water Blaze. In other systems this tube is sealed to keep the water out. In the Water Blaze the heat is released directly into the tank of water, through openings in the tube, causing the surrounding water to flash boil. All of the heat comes in direct contact with the water.

  • The resulting steam rumbles to the surface and is vented through an exhaust flue. Waste oils float to the top and are skimmed off. Waste solids settle to the bottom of the tank for easy disposal.

Because of this unique process, the Water Blaze can deal with a broad range of waste streams and even reduce VOCs (Volatile Organic Compounds), ranging from petroleum products to pesticides. Among the many applications are: oil-field cleaning water, oil-based process waters, plating and metal finishing waste waters, wire-drawing compounds, paint booth washer solutions, manufacturing process waters, dyes and inks, acid rinses and alkali cleaners, tumbling and vibratory fluids, and water-soluble oils.

There are four Water Blaze models for handling flow rates of 15, 30, 60 and 120 gallons per hour. Custom models with flow rates of up to 750 gallons per hour have also been produced by Landa.

As for heat efficiency, the 15 gph unit uses 142,750 BTUs while the 60 gph unit uses 571,000 BTUs.

Independent laboratory tests of the steam show negligible amounts of contaminants emitted into the air, in most cases well below the levels set by the federal government's Clean Air Act.

All of the Water Blaze models can be fitted for natural gas or propane and can be automated for 24-hour operation.

Installation of the Water Blaze simply requires hook-ups of electricity (either 110V or 220V), natural gas (or propane), a garden hose, and a vent pipe.

This new technology was pioneered by engineers at Landa, Inc., a manufacturer of steam cleaners, high-pressure washers, and water cleaning systems. Landa has been in business since 1969.

Landa was the first pressure washer manufacturer in the world to certify its entire product line to UL safety standards and the company became ISO-9001 registered in 1997.

For more information, contact Crismon Lewis, 1-800-547-8672, Ext. 175.

Landa Water Cleaning Systems, 4275 NW Pacific Rim Boulevard, Camas, WA 98607. Tel: 800-645-2632; Fax: 360-833-9200.