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Product Code: RXSOL-19-1305-500
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Oxygen Control
Chemical Oxygen Scavengers. The oxygen scavengers most commonly used in boiler systems are sodium sulfite, sodium bisulfite, hydrazine, catalyzed versions of the sulfites and hydrazine, and organic oxygen scavengers, such as hydroquinone and ascorbate.
It is of critical importance to select and properly use the best chemical oxygen scavenger for a given system. Major factors that determine the best oxygen scavenger for a particular application include reaction speed, residence time in the system, operating temperature and pressure, and feedwater pH. Interferences with the scavenger/oxygen reaction, decomposition products, and reactions with metals in the system are also important factors. Other contributing factors include the use of feedwater for attemperation, the presence of economizers in the system, and the end use of the steam. Chemical oxygen scavengers should be fed to allow ample time for the scavenger/oxygen reaction to occur. The deaerator storage system and the feedwater storage tank are commonly used feed points.
In boilers operating below 1,000 psig, sodium sulfite and a concentrated liquid solution of catalyzed sodium bisulfite are the most commonly used materials for chemical deaeration due to low cost and ease of handling and testing. The oxygen scavenging property of sodium sulfite is illustrated by the following reaction:
| 2Na2SO3 | + | O2 | ® | 2Na2SO4 |
| sodium sulfite | oxygen | sodium sulfate |
Theoretically, 7.88 ppm of chemically pure sodium sulfite is required to remove 1.0 ppm of dissolved oxygen. However, due to the use of technical grades of sodium sulfite, combined with handling and blowdown losses during normal plant operation, approximately 10 lb of sodium sulfite per pound of oxygen is usually required. The concentration of excess sulfite maintained in the feedwater or boiler water also affects the sulfite requirement.
Sodium sulfite must be fed continuously for maximum oxygen removal. Usually, the most suitable point of application is the drop leg between the deaerator and the storage compartment. Where hot process softeners are followed by hot zeolite units, an additional feed is recommended at the filter effluent of the hot process units (prior to the zeolite softeners) to protect the ion exchange resin and softener shells.
As with any oxygen scavenging reaction, many factors affect the speed of the sulfite-oxygen reaction. These factors include temperature, pH, initial concentration of oxygen scavenger, initial concentration of dissolved oxygen, and catalytic or inhibiting effects. The most important factor is temperature. As temperature increases, reaction time decreases; in general, every 18°F increase in temperature doubles reaction speed. At temperatures of 212°F and above, the reaction is rapid. Overfeed of sodium sulfite also increases reaction rate. The reaction proceeds most rapidly at pH values in the range of 8.5-10.0.
The following operational conditions necessitate the use of catalyzed sodium sulfite:
High feedwater sulfite residuals and pH values above 8.5 should be maintained in the feedwater to help protect the economizer from oxygen attack.
Some natural waters contain materials that can inhibit the oxygen/sulfite reaction. For example, trace organic materials in a surface supply used for makeup water can reduce speed of scavenger/oxygen reaction time. The same problem can occur where contaminated condensate is used as a portion of the boiler feedwater. The organic materials complex metals (natural or formulated catalysts) and prevent them from increasing the rate of reaction.
Sodium sulfite must be fed where it will not contaminate feedwater to be used for attemporation or desuperheating. This prevents the addition of solids to the steam.
At operating pressures of 1,000 psig and higher, hydrazine or organic oxygen scavengers are normally used in place of sulfite. In these applications, the increased dissolved solids contributed by sodium sulfate (the product of the sodium sulfite-oxygen reaction) can become a significant problem. Also, sulfite decomposes in high-pressure boilers to form sulfur dioxide (SO2) and hydrogen sulfide (H2S). Both of these gases can cause corrosion in the return condensate system and have been reported to contribute to stress corrosion cracking in turbines. Hydrazine has been used for years as an oxygen scave
Product Code: RXSOL-60-6304-050
Physical Properties:
| Melting point | 2450°C |
| Boiling Point | 3500°C |
| Density | 2.51 g/mL at 25 °C (lit.) |
| Solublity | insoluble in H2O, acid solutions |
| Form | Powder |
| Colour | Black |
| Specific gravity | 2.51 |
| Resistivity | 4500 (ρ/μΩ.cm) |
| Water solublity | Insoluble in water |
| Stability | Stable. Incompatible with oxidizing agents. Not flammable. |
| insoluble in H2O, acid solutions |
| insoluble in H2O, acid solutions |
Product Code: RXSOL-18-1092-025
| PRODUCT NAME | : | Mordant Pre Treatment Etching Wash |
| Odour | : | Characteristic Odour |
| Solubility in water | : | COMPLETE , ( 5.48 g/mL ) |
| Density | : | > 1 g/cm3 |
| Flashpoint | : | 31 deg C |
| Skin absorption/irritation | : | YES |
Product Code: RXSOL-39-5015-025
It is very Powerful Aluminium Cleaner
| Appearence | liquid |
| Colour | light red |
| Odour | mild |
| Melting point: | not applicable |
| Flash point | not applicable |
| Spontaneous ignition | not applicable, no Danger of explosion |
This product is avilable with all our associated ship chandlers of INDIA and Middle East by product code no RXSOL-16-1028-025.
we are manufactrer of RXSOL-16-1028-025 , and supplier in kakinada, Visakhapatnam, Vizag, Mumbai, Goa, Surat, Gandhidham, Kandla, Mundra, Chennai, Ennore, Kolkata, Haldia, Pirpav, Fujairah, Dubai, Sharjah, Abu Dhabi and Gulf.
RXSOL brand Aluminium Cleaner exporter for TURKEY, Australia.
Do not allow concentrate to come in contact with skin. Avoid contact Eyes and clothing. Alu Brightener is a concentrated liquid acid formulated .
First Aid: Skin Contact: Wash area with soap and water. Rinse with a solution of vinegar and water. If irritation persists seek medical attention
Eye Contact: Flush with water for 15 minutes. Obtain medical attention
Ingestion: Drink several glasses of fruit juice. Do not induce vomiting. Obtain immediate medical attention.
Product Code: RXSOL-23-1496-025
Product Code: RXSOL-23-1496-125
Sodium Meta Bisulphite manufacturer in India, UAE, Canada, Best quality Sodium Meta Bisulphite SMBS ready stock in Mumbai, Kandla, Surat, Howrah, Vishakhapatnam, Chennai, Fujairah, Muscat Barka Oman, Kenya.
Importers of Trichloroisocyanuric Acid 90% China (TCCA), Sodium PerCarbonate Coated China Granules & Tablets, Potassium BiCarbonate China Extra Pure 99.9%, Sodium MetaBiSulphite China(SMBS), Sodium Silico Fluoride Taiwan"
Product Code: RXSOL-32-6109-251
Product Code: RXSOL-19-6223-125
| Physical state | : | Solid |
| Appearance | : | Crystalline |
| Color | : | Gray; black; dark violet; dark blue |
| Melting point | : | 113.7 °C |
| Boiling point | : | 184.4 °C |
| Flash point | : | Not Applicable |
Product Code: RXSOL-16-2066-200
| Appearance | Clear to Pale Yellow Liquid |
|
Water content |
4-5% w/w |
| Aqueous Emulsion | Ready dispersible white milky emulsion |
| Specific Gravity at 25°/25°C | 1 |
| Odour | Slight |
| Specific Gravity | <1 |
| Saponifaction Value | 11-15 mg KOH/g |
Low dose levels, typically in the range 0.05 to 0.1 mg/l in the seawater feed stream, depending on feed water quality. Activity is not dependent on temperature. No need to alter dose level if top brine temperature (TBT) changes. Negligible steam volatility and carry over into the distillate.
RXSOL-16-2066-200 is antifoam emulsion and its more concentrated antifoam emulsion. It has excellent candidates for controlling foam in amine and glycol dehydration units. This is suitable products for gas plants and have excellent stability in the presence of salts, resulting in reduced deposits on the plant’s equipment. RXSOL-16-2066-210 help preserves foam control under the severe conditions of a dehydrating unit. These conditions can remove water from other antifoam emulsions, rendering them immediately inactive.
Product Code: RXSOL-42-1914-050
Product Code: RXSOL-97-1914-050
Product Code: RXSOL-45-1914-050
