Boiler Chemicals-42

Boiler Water Treatment products

CHARACTERISTIC :

• Convenient liquid treatment, which provides the basic alkalinity on which successful water treatment depends.
• Provides optimum conditions for hardness control to function.
• Neutralizes acid conditions.
• Will assist in keeping silica in suspension.
• Simple test to determine level of treatment.
• Can be used in boilers of all pressures.
• Can be used as a neutralizer after acid cleaning operations
• Suitable for use with all auxiliary boilers; waste heat units; economizers, package boilers, smoke and water tube boilers.
• Dispersant action suspends sludge and sediment particles for efficient blow down.
• Oxygen scavenging for optimum protection.
• Protects boiler, steam lines, condensate lines and feed water lines from corrosion.
• Fast action due to catalyst.
• Simple test to determine level of treatment.

Basic Boiler System Schematic

Below is a summary of problems associated with the common impurities in water and solutions to each problem.

List Of Problems Caused By Impurities In Water

Chemical feed should be continuous. Chemical pumping rates can create problems especially for neat feed set ups. Using on/off feed systems such as a recycle timer can create problems. Chemical feed pumps should be sized or product strengths should be adjusted to allow continuous feed.

Steam and carbon dioxide leave continuously, so setting up a neutralizing amine pump to feed intermittently can lead to wide variations in condensate pH control. If sampling is done from a condensate receiver, the tank volume may buffer the variations and the changes may not be noticed, but corrosion could be occurring to areas of the piping that see the rapidly changing pH.


If polymeric dispersants, phosphonates, phosphate, or chelants are fed intermittently into the feedwater using a recycle timer, and the amines are not fed continuously, a cycle of iron slugs returning in the condensate can be followed by slugs of high dispersancy cleaning of the iron from the deaerator and dragging it into the boiler.

Load changes can affect chemical concentrations when the chemical feed is base fed. Example: Steam production of one million lbs./day; 4% blowdown; 20% active boiler polymer product fed at 5 pounds per day. The calculated daily average polymer concentration would be 24 ppm. Assume peak plant production load is 60,000 lbs./hr., but during the overnight hours the load is only 5,000 lbs./hr. If the dispersant is being fed continuously over the 24 hours, during the 8- hour low load period, the boiler polymer concentration would have increased to over 200 ppm. Upon high fire when production resumes, carryover is very possible because of over concentrating the polymeric dispersant.

Chemical feed needs to be paced to steam production, especially where significant load changes occur.

Carbon dioxide can concentrate in steam and condensate making neutralizing amine treatment impractical. Carbon dioxide levels can be relatively low in steam exiting a boiler at only a few ppm, but if there are areas where it becomes “trapped” and can accumulate, concentrations can reach extremely high levels into the hundreds or even thousands of ppm.

CO2 is a non-condensable gas. It has a distribution ratio in the steam piping and condenses at points throughout the system. At the boiling point, the solubility of the gas in water is extremely low. The solubility of the CO2 is actually lower in the condensate than it is in the steam. For the CO2 to escape from the steam into the water it will accumulate in the steam space just above the water level until the partial pressure becomes high enough for the CO2 in the incoming steam to be able to exit into the condensate. This creates a steady state condition of CO2 coming in and exiting, but an area of severe localized corrosion occurs where the carbon dioxide concentration is high.

The highest CO2 concentration normally occurs just above the condensate water level. If there is an area where condensation is occurring and running down pipes or the sides of vessels, the CO2 concentration will be very high and the pH will be about 5.3 – 5.5 in that location creating high corrosion rates.


The solubility of CO2 increases dramatically as the condensate temperature falls below 212 °F. When there is an accumulation of CO2 in an area and the condensate temperature is relatively low, the amount of carbon dioxide going into solution will be extremely high. Where low-pressure steam is used that contains CO2 and the heat exchange process has relatively close temperature differentials between the steam and the condensate, there is potential for high uptake of the CO2 into the condensate and localized low pH.

Neutralizing amines are selected in an effort to condense in the right concentrations to carbon dioxide condensation levels throughout the steam system. Neutralizing amines cannot control corrosion where this localized accumulation of carbon dioxide occurs since the high CO2 overwhelms the demand for the amine. Even point source addition of amine may not be able to satisfy the demand.

Where the concentrating effect of CO2 occurs, methods of reducing the problem include eliminating or minimizing CO2 in the steam, venting off the CO2 in the localized area, eliminating condensate in the area, applying a filming amine or metal passivator, or using higher temperature steam and increasing condensate temperature to reduce the CO2 content in the condensate.

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A one-step and one SHOT treatment to control the formation of rust and scale in boilers. Contains alkaline compounds, scale and corrosion inhibitors, oxygen scavengers and sludge conditioners. which resulting in a scale and corrosion control by one shot operation.

Boiler water treatment speacialized chemical products One Shot Universal Liquitreat  Exporter, manufacturer, supplier in Mumbai, Gandhidham - Kandla, Mundra, Sikka, Surat, Kolkata - Haldia, Buz Buj, Paradip, Visakhapatnam - Gangavaram, Fujairah, Dubai, Sharjah, Abu Dhabi, Ruwi Barka Muscat Sohar, Oman, Sudan, Yemen, Nairobi Kenya

BOILER WATER TREATMENT chemicals manufacturer and supplier in INDIA, MUSCAT OMAN, UAE DUBAI, Nairobi

RXSOL HEDP 60% is an organophosphonate with multifunctional properties like sequestration, deflocculation, threshold inhibition and hydrolytic stability, as a single active ingredient. Because of the combination of these properties. RXSOL HEDP 60%  has a wide range of applications. One of the most important applications is in scale prevention and corrosion inhibition in water treatment.

It is used as a strong chelating agent for metal ions like Ca, Mg & Fe in water treatment, textile applications. They show efficient inhibition for CaCO3 & CaSO4 alone or in combination with low molecular weight polymers. They show efficiency in protecting metal corrosion. This is having very strong chlorine stability.

Etidronic acid / HEDP supplier and Exporter in Mumbai, Kandla, Kolkata, Chennai, Visakhapatnam, Fujairah, Dubai, Sharjah, Abu Dhabi, Ajman.

Synthesis / Manufacturing Process of HEDP:
The primary raw materials used to manufacture HEDP are acetic anhydride and either phosphorus acid or phosphorus Trichloride. The phosphorus trichloride is converted to phosphorus acid within the reaction vessel, and then reacts with the acetic anhydride.

Uses / Application of HEDP
HEDP is used as a strong Chelating Agent for Metal Ions like Ca, Mg & Fe in water Treatment, Textile, Sugar Processing, Dye, Soaps & Detergents.

Properties :

HEDP is a 60% active aqueous solution and is part of the Biphosphonic Acid Group. It is highly water soluble and stable under harsh conditions, which makes it ideal for water treatment. The main uses in the water treatment industry are, reverse osmosis formulation, cooling water treatment, boiler water treatment, swimming pools, scale and corrosion inhibitor.
 

Handling :  HEDP 60% is slightly toxic by ingestion, practically non-toxic on dermal application, moderately irritating to the skin and corrosive to the eyes. Care should be taken to avoid contact with skin and eyes. In case of contact, flush the affected area with plenty of water. Goggles and rubber gloves should be used at all times when working with the concentrated material.

Storage : Store in cool place. Keep container tightly closed in a dry and well-ventilated place. Containers which are opened must be carefully resealed and kept upright to prevent leakage. Over time, pressure may increase causing containers to burst Handle and open container with care.

Packing : 65 Kgs HDPE Carbouy / 275 Kgs Polydrum / 1400 Kgs IBC
 

HEDP 60% ( 1, Hydroxyethylidene Diphosphonic Acid)

Description:
HDPE is an organo phosphoric acid Corrosion inhibitor. It can chetale with Fe, Cu, and Zn ions to  form stable chelating compounds . It can dissolve the oxidized material on Metal Surfaces.HDPE can react with metal ions with water system to form hexa element Chelating Complex, with Calcium ion in Particular.Therefore, HDPE is Good Anti Scale and Visible threshold effects.

Physical Properties:
Chemical Name:      1-Hydroxyethylidene-1,1- Diphosphonic Acid Etidronic Acid
Abbreviation:            HDPE
Case No:                   2809-21-4
Molecular Structure:
Molecular Formula:  C2H8O7P8
Appearance:            Clear Colourless to pale yellow liquid
 Molecular Weight:   206

Specification:
Color and physical form:                Clear , colorless liquid
Molecular Weight :                         206
Active content:                               60 % (+/-2 %)
Density :                                        143-1.47
pH of 1%  Solution :                      Max 2
Chelation Value:                            NLT 500
Phosphorus Acid Content:             Max 2 %
Chloride :                                       Max 150 PPM
Iron:                                               Max 20 PPM

Packaging:                                      65 Kg / 250Kg  /290Kg  HDPE Drum / IBC
Other Information
Reach Registration :                       No
MSDS:                                            Available on Request
Sample / Other Details:                  Available On Request

Application /Uses:
HDPE Is used as Scale and corrosion Inhibitors in circulating cooling water systems, oil fields and low pressure boilers in fields such as electric power, Chemical Industry, metallurgy , fertilizer etc. In the Light Woven Industry ,HDPE Is used as Detergent in Metal and non metal .In the dyeing Industry,HDPE is Used as Peroxide Stabilizer and dye fixing agents.In non Cyanide electroplating HDPE Is used as chelating agents.

Customized / Special Grades also be provided as per customer requirement . 

Standardized at 25°C against chemicals whose certification is traceable to NIST.
Formula: C₁₀H₁₄N₂Na₂O₈·2H₂O
MW: 372.24 g/mol
Melting Point: 255 °C
Storage Temperature: Ambient
CAS Number: 6381-92-6
EINECS: 205-358-3

Synonyms : Tetramethylthionine chloride

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