Now we have to choose a pump for dosing TSP. Tank selection:. Select a cylindrical tank. Pump can be operated at higher stroke by reducing the concentration of TSP in tank. But standard practice is to dose chemical at higher flow rate with less chemical concentration to get good result.
Labels: Boiler. Location: India. No comments:. Newer Post Older Post Home. Subscribe to: Post Comments Atom. Here in our plant the dosing is located at the economizer inlet. It has also been emphasized that polyphosphates must not be fed to the boiler feedwater line when economizers, heat exchangers, or stage heaters are part of the preboiler system. As presented by one of the references by Byworth Boilers: where an economizer or feedwater pre-heater is used they should be dosed directly into the boiler shell, this is to prevent deposition on the heat transfer surfaces.
The information which I have are contradicting to the location of dosing point here in our plant which is at the economizer inlet. Can someone help me with this concern? So that I could address it also to our management and do some necessary revisions if there's any solid information I could share to them. Hoping for a positive response.
I worked in an Ammonia plant that produce High pressure steam barg. Posted 25 May - AM. Posted 28 May - PM. Community Forum Software by IP. Definition of dose Entry 2 of 2 transitive verb. The softening chemicals used include soda ash, caustic and various types of sodium phosphates. These chemicals react with calcium and magnesium compounds in the feed water.
Sodium silicate is used to react selectively with magnesium hardness. Ammonia is added to the steam drum, or to the deaerator storage tank, either as ammonia or as amine. It is used to control the pH of the condensate returned to the system from the process.
It can do this because it evaporates and is carried out of the boiler with the steam. Oxygen dissolved in water causes corrosion. The boiler receives the feed water, which consists of varying proportion of recovered condensed water return water and fresh water, which has been purified in varying degrees make up water.
The make-up water is usually natural water either in its raw state, or treated by some process before use. Regular dosing of iodine is recommended. However, overdosing can be toxic, so it is absolutely critical to test before adding any amount to your reef tank.
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