DELOACH BLOG

Forced Draft Degasification

Posted by Anthony DeLoach, President on Oct 23, 2018 7:49:53 AM

In the production and purification of water for industry

there are many types of different processes available to remove harmful minerals and gases from the water stream but the most effective process and most cost effective from both a capital investment and operational cost is a “Forced Draft Degasification System” (Degasifier).

Degasification is used in a wide range of water processes for industrial and municipal applications which extend from the production of chemicals to the production of semiconductors and in all applications the need to remove contaminants from the water and dissolved gases is key to achieving the end results needed in the industrial water process. Water from the ground often contains elements such as calcium carbonate, manganese, iron, salts, hydrogen sulfide, and sulfur just to name a few of the basic contaminants and these naturally occurring elements can cause serious damage and consequences to process equipment such as boiler systems, piping, membranes, and cation and anion exchange resins used in the demineralization process.

Calcium carbonate can dissolve in water under certain pH ranges forming carbonic acid and releasing carbon dioxide (CO2) gases. These gases are not only very corrosive to equipment like boiler feed systems and boiler tubes but also attack the actual resin beds found in cation and anion softening and demineralization system causing an increase in regeneration and chemical consumption and resin bed replacement.

By incorporating a Force Draft Degasification system you can remove dissolved gasses

like CO2 and hydrogen sulfide (H2S) to as low as 99.999% and improve the cation and anion system performance, extend the resin bed life, and lower the operating cost of the water treatment process.

Quite often Forced Draft Degasification is utilized “post” treatment to also remove newly formed dissolved gases prior to entering the boiler feed system to prevent corrosion damage within the tubes and feed system and pumps. These gases are easily removed with the forced draft degasifier at a much lower cost than chemical additives or liquid cell degasification that requires higher capital cost and much higher operating cost.

Read More

Topics: water treatment issues, degasification, pH levels of water, iron oxidation, water treatment, water distribution system, aluminum, water plant, odor control scrubber, hydrogen sulfide (H2S), calcium carbonate, media packing, pH levels, Langilier index (LSI), Decarbonation, ION Exchange Resin, dissolved gases, feed water, De-Aeration, wastewater, carbon dioxide, decarbonator, degasifier, carbonic acid, H2S Degasifier

Industrial Odor Control: The Do’s and Don’ts

Posted by Anthony DeLoach, President on Jul 26, 2018 8:32:00 AM

Avoid problems with calcium chlorite, and corrosive gasses with your odor control scrubber.

When planning or designing an odor control system one should pay close attention to several key variables that can cause havoc on a chemical odor control scrubber when trying to treat hydrogen sulfide or ammonia gases.   The need for odor control occurs in many different forms and it is important to have a good understanding of the process that is creating the odorous or corrosive gas and the need for odor control & air emissions treatment.

First, begin to identify

all the potential obstacles that may creep up later after the chemical odor or corrosive gas control system goes online like acid or caustic consumption. As an example, chemical odor control systems that are designed for water treatment for the municipal industry are typically needed and attached to a degasification or decarbonation process which is often needed to treat hydrogen sulfide (H2S). However, many times designers may not pay close enough attention to the type of water process that is available to use for “make-up” water for the chemical scrubber and the addition of caustic can create scaling or fouling. This unknown variable of the makeup water quality can lead to a complete tower shutdown if the chemical scrubber distribution and media bed scales or fouls. The most commonly used chemicals for a hydrogen sulfide (H2S) scrubber are either chlorine in the form of sodium hypochlorite or caustic in the form of caustic soda. Both of these chemicals are common to a water treatment facility and are already in place for the adjustment and control of pH.

The makeup water plays a significant role in the operation of a chemical scrubber.

When water containing high levels of hardness levels is used as the source for the makeup water your chemical scrubber can become fouled and scaling can occur in a matter of hours depending on the alkalinity and salts within the water. Solidification can occur from the scaling when combining sodium hypochlorite and raw feed water at certain pH ranges and these ranges are normally the range needed to achieve peak performance. Calcium chloride will form and your chemical odor control scrubber will become a solid chunk of calcium chlorite making the ability for water or air to pass freely through the media packing next to impossible. No matter what type of media packing is utilized in the odor control or gas scrubber it can foul and scale if the water chemistry is incorrect.  Trust me when I say “been there and done that”!  I have seen operators who have allowed a chemical scrubber to become out of balance with pH control and completely solidify the tower column to the degree that neither air nor water passage is possible. With ammonia scrubbers, the problem can still occur but are different with different sets of parameters.

Read More

Topics: odor control, water treatment, advanced treatment solutions, biological scrubber, water plant, odor control scrubber, hydrogen sulfide (H2S), calcium carbonate, media packing, pH levels, Alkalinity, Langilier index (LSI), scaling, chlorine, caustic, ION Exchange Resin, Safe drinking water, dissolved gases, De-Aeration, carbon dioxide, oxygen, degasifier, gases, H2S Degasifier, calcium chlorite

Don't Foul Your Chemical Odor Control Treatment System.

Posted by Anthony DeLoach, President on May 3, 2018 12:00:00 AM

When operating a chemical odor control treatment system it is important to make sure you have a good handle on the makeup water supply system in terms of its water quality. Having the LSI number out of balance can create havoc to the odor control treatment system in a matter of hours or over a short duration of time.

Read More

Topics: odor control, calcium carbonate, Chemical Odor, media packing, Langilier index (LSI), scaling, chlorine, caustic

Removing Hydrogen Sulfide In Water (H2S H2O).

Posted by Anthony DeLoach, President on Apr 30, 2018 12:00:00 AM

Do you need to remove or increase your reverse osmosis system's hydrogen sulfide removal efficiency?

Read More

Topics: water treatment issues, water quality, degasification, pH levels of water, water treatment, advanced treatment solutions, hydrogen sulfide (H2S), pH levels, Alkalinity, Langilier index (LSI), H2S Degasifier, H2S H2O, removing hydrogen sulfide in water

Subscribe to our blog

Recent Posts