topleftcorner.gif (337 bytes)
plaque.gif (1433 bytes)
menutop.gif (546 bytes)
contenttopleft.gif (398 bytes)

Home Up Products Safety Regulatory Affairs Ammonia Library Contents Page Affiliations Information Request RMT Home Page

filler.gif (53 bytes)
toprightcorner.gif (788 bytes)
filler.gif (53 bytes) Up
Power Plants
Water TreatmentAnhydrous Ammonia
Aqua Ammonia
Urea

 

filler.gif (53 bytes)

WATER TREATMENT

 

Ammonia is used in several areas of water and wastewater treatment, such as pH control, in solution form to regenerate weak anion exchange resins, in conjunction with chlorine to produce potable water, and as an oxygen scavenger in boiler water treatment.

 

Acid Neutralization  is used in the following areas:

 

bullet

Petroleum refining areas

bullet

Metallurgical & Mining operations

bullet

Chemical Processing

bullet

Wet battery manufacturing & rebuilding operations

 

Acid Neutralization on an industrial scale is usually accomplished by the treatment of acidic solutions by the manual or automated addition of a basic (alkaline) compound. 

 

bullet

Anhydrous Ammonia is a strong base and is added to acidic solutions as vapor or liquid.

 

Advantages of Ammonia in Acid Neutralization

 

bullet

Ammonia adds no additional salts to a solution, eliminating solid precipitates and sludge that must be handled as bulk wastes and can become very costly.  

bullet

Ammonia can be used in various other processes in the plant.

bullet

Ammonia provides fast neutralization.

bullet

Fast neutralization allows more accurate control and less waste.

bullet

Minimum equipment requirement.

bullet

Minimum handling and labor requirement.

bullet

Minimum maintenance due to reduced corrosion to valves, piping and controls.

bullet

Minimum space requirement for total system.

 

Equipment for Acid Neutralization when using Ammonia

 

bullet

A manual system with a portable pH meter can be installed if neutralization is done on a batch basis.

bullet

More complex automated systems can be designed and built to meet the requirements of the situation.

bullet

Systems can be designed and installed utilizing cylinder manifolds or bulk ammonia systems.

bullet

Ammonia is stored under pressure, therefore no transfer equipment or outside power source is needed.

 

Liquid vs. vapor ammonia for acid neutralization

 

bullet

Liquid ammonia is used for acid neutralization systems that require large quantities of ammonia over a short period of time.

bullet

Vapor is limited due to the rate of liquid ammonia vaporization.  However, the installation of a vaporizer can aid in maintaining the vapor withdrawal rate.

 

PH Control

 

bullet

Ammonia is used to increase pH in Pharmaceutical, Ore Flotation & Food Industries.

 

Anhydrous Ammonia for Acid Mine Drainage

 

bullet

Ammonia is commonly used as a neutralizing agent for acid discharges associated with coal mining.

bullet

The continuous treatment method is used where vapor is injected at the entrance channel to the pond where it is evenly dispersed into the pond.

 

Advantages

 

bullet

Ammonia is a very cost effective and operationally efficient chemical.

bullet

The rapid and complete reaction of ammonia with water makes accurate feed control possible resulting in minimal waste.

bullet

Ammonia's flexibility to be added as a vapor or liquid is a great advantage for plants that wash several different seams of coal where each has a different effect on pH control.

 

Equipment

 

bullet

ASME coded storage tank - for ammonia storage.

bullet

Steel pipe lines - to prevent corrosion in the lines.  Ammonia is incompatible and corrosive with many other metals.

bullet

Needle valve - for feed control.

bullet

Check valve - to prevent water from coming back in the line and contaminating the storage system.

bullet

Vaporizer - is needed in winter weather when the surrounding air is cold causing pressure to drop in the tank, decreasing the vapor withdrawal rate.  The vaporizer will heat the liquid ammonia changing it to vapor, maintaining the vapor feed rate.

bullet

Proportioning valve and proportioning pH controller - allows control of feed rate when gradual changes occur in water flow rate.

bullet

pH probe - a built-in safeguard that shuts down the system preventing excessive amounts of ammonia discharging into the receiving stream if pH reaches the high set point.

 

Water Chlorination Process

 
bullet

Water Chlorination is a waste-water treatment process that uses continuous chlorine treatment to achieve high standards of bacteriological quality and improvement in other water treatment processes. 

 

Applications

 

bullet

Potable water treatment

bullet

Disinfection of new or repaired mains, tanks, reservoirs and wells.

 

Chlorine-Ammonia Treatment

 

bullet

Chlorine is added to water containing natural or added ammonia.  The ammonia reacts with the HOCl to form various chloramines that retain the oxidizing power of the chlorine.

bullet

It is used in the water disinfection process to destroy harmful and "nuisance" organisms, including disease producing, pathogenic organisms.  

bullet

The combination of chlorine and ammonia produce a more stable disinfecting residual than chlorine alone.

 

R. M. Technologies Inc. is an industry leader in the field of ammonia system integration.  We will provide the conceptual design, fabrication, turnkey procurement, installation, system training, system start-up, scheduled preventative maintenance programs, safety training, regulatory assistance with PSM, RMP and General Industry program requirements and 24 hour technical response.  

 

Our equipment design and fabrication includes the ammonia storage and delivery system, the metering station, ammonia injection system, system controls, skid packages and monitoring equipment.

 

For questions, comments or additional information, please contact us at:

 

R. M. Technologies Inc.

Phone:  800-775-4280

Fax:  888-533-4884

E-Mail:  generalmail@rmtech.net

 

 
bottomleftcorner.gif (320 bytes)
counterleft.gif (787 bytes) Hit Counter counterright.gif (771 bytes)
qnavleft.gif (371 bytes)

Back Home Up

bottomrightcorner.gif (720 bytes)