Table of Contents
- 1 What is hydrazine used for in power plant?
- 2 Why dosing is used in boiler?
- 3 Is hydrazine polar or nonpolar?
- 4 Why phosphate is added in boiler?
- 5 What is the use of amonia phosphate and hydrazine in boiler?
- 6 How to calculate hydrazine dosing in boilers based on O2 content?
- 7 How does ammonia Casale’s catalyst bed work?
What is hydrazine used for in power plant?
Hydrazine is generally used as an oxygen scavenger for corrosion control in thermal power plants. The use of alternative chemicals such as nontoxic oxygen scavengers and new oxygen scavenger-free water treatment technologies is recommended or required in foreign countries.
Why dosing is used in boiler?
Power plant and calculations In this Phosphate especially Tri sodium phosphate is added at the boiler drum which is operating at high pressure (so called HP dosing system) through HP dosing system. If it is dosed at feed pipe, it may react with impurities and sludge may be deposited at the feed line.
What is the chemical formula of hydrazine?
N2H4
Hydrazine/Formula
Is hydrazine polar or nonpolar?
Explanation: Hydrazine is a polar compound that possesses the requirements for hydrogen bonding: an “acidic hydrogen” (a hydrogen bonded to a highly electronegative atom such as oxygen, nitrogen or fluorine) and the presence of a lone pair.
Why phosphate is added in boiler?
Phosphate compounds are common additives for boiler water treatment. Phosphate compounds react with any remaining hard water compounds to create a soft sludge that is eliminated through blowdown.
How salts are precipitated from boiler?
These salts reach the deposit site in a soluble form and precipitate when concentrated by evaporation. The precipitates formed usually have a fairly homogeneous composition and crystal structure. High heat transfer rates cause high evaporation rates, which concentrate the remaining water in the area of evaporation.
What is the use of amonia phosphate and hydrazine in boiler?
Phosphate is dosed in the drum of the boiler to remove silica concentration, Amonia is dose in the cep discharge to improve ph of feed water and Hydrazine is dose in the dearator discharge to remove the dissolved oxygen from the feed water if you want more detaila than msg me We dose hydrazine to raise the pH level of main condensate.
How to calculate hydrazine dosing in boilers based on O2 content?
Require the calculation for Hydrazine dosing in Boilers based on O2 content. Similarly for amine dosing in boiler based on PH. 1. Reaction of hydrazine NH2NH2+O2–>2H2O+N2 indicates dosing of 1 gr NH2NH2 / gr O2.
Why do we dose hydrazine to raise the pH of condensate?
We dose hydrazine to raise the pH level of main condensate. It is a common practice in thermal power plant. Presence of excess ammonia may cause corrosion of condenser tubes. Therefore, beyond certain permissible limit, concentration of ammonia is kept restricted.
How does ammonia Casale’s catalyst bed work?
Ammonia Casale’s process employs a catalyst bed that harnesses axial-radial technology, which has a lower pressure drop and higher efficiency than standard catalyst beds. Ammonia Casale’s plant design has a production rate of 2,000 m.t./day. One of the key features of this design is axial-radial technology in the catalyst bed (Figure 8).