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Does condensate return need to go through a flash tank prior to a DA tank for a steam boiler system?
In a steam boiler system, condensate return does not necessarily need to go through a flash tank before entering the Deaerator (DA) tank. However, using a flash tank can be beneficial in recovering some heat and reducing pressure, allowing for more efficient use of the condensate. This process can help minimize the amount of makeup water required and improve overall system efficiency. Ultimately, whether to include a flash tank depends on the specific system design and operational requirements.
What else can I help you with?
Why is the boiler water circulating pump required for EGB?
I think because it works more like a heat exchanger taking heat from the exhaust gas, rather than a "standard" boiler with a furnace?An EGB needs a pump to circulate the water through the pipes in the exhaust stack, whereas a furnace-heated boiler can use convection to move the fluid through the system..?Might have something to do with lower temperatures in an EGB?
What is the inlet pressure of a condensate tank?
It can be at any pressure less than the main steam pressure. I've operated steam systems with condensate tanks at widely varying pressures. The pressure a condensate tank, (which condenses some steam, but typically takes returns from steam traps) is wholly dependent on the system is installed in. Some heating system condensate tanks are designed to handle no more than 30 psig (minimum design requirement) yet take condensate at 1 or 2 psi from the steam traps. Other high pressure production lines operating at 50 - 100 psig could discharge to a tank at 50 - 100 psi, though the actual pressure would be reduced by the length of pipe transferring it to the tank. And the highest pressure I've operated a condensate system at was 600 psig, the steam system drew the steam for process from an extraction stage on the turbine at nominally 600 psi, though at low loads it was typically a much lower pressure.
What are the common oxygen scavengers used for boiler water?
There is a chemical called Carbohydrazide which is used in boiler water. Carbohydrazide is a volatile oxygen scavenger, contributes no solids to the system, reacts readily with oxygen at low temperatures and pressures, and passivates the metal of the boiler system. Carbohydrazide cannot be used in applications where the steam comes into contact with food.
What is the purpose of observation tank in boiler?
The observation tank in a boiler system serves as a visual monitoring point for the water level and overall condition of the boiler water. It allows operators to assess the water quality, detect any impurities, and ensure the proper functioning of the boiler. By providing a direct view, it helps in maintaining safety and efficiency, preventing issues like overheating or system failure. Additionally, it can facilitate sampling for analysis and maintenance purposes.
Why is it important to maintain a gas-free condition in the boiler feed water?
Maintaining a gas-free condition in boiler feed water is crucial to prevent corrosion and scaling within the boiler system, which can lead to decreased efficiency and increased maintenance costs. Dissolved gases, especially oxygen and carbon dioxide, can cause pitting and other forms of corrosion in metal components. Additionally, gas bubbles can impair heat transfer, reducing the overall performance of the boiler. Ensuring the feed water is free of gases helps extend the lifespan of the boiler and improve operational reliability.
In a two pipe system condensate is normally returned to the boiler by?
If its a large steam system which I am assumeing,then a pump or pumps.
Why is it desirable to return as much condensate to the boiler as passible?
In order to assure that the boiler has enough make up water to continue w/ normal operations w/ out having to introduce new water to the system that would bring in additional air and impurities that would be harmful to the system.
When steam condenses what system does it enter first?
When steam condenses, it typically enters the condensate system first. From there, it may be collected and redirected back into the boiler for reuse in the steam generation process.
How does an inverted steam trap work?
An inverted steam trap works by allowing condensate to flow out of the system while preventing steam from escaping. When condensate builds up, the trap closes and prevents steam from passing through until the condensate is released. This helps maintain efficient operation by removing unwanted condensate and maintaining steam within the system.
Is boiler a closed system?
A boiler can be a closed system if you include the pipes it is connected to, but usually there are relief valves that will allow the escape of steam to protect against excess pressure and inlets that will allow adding liquid to the boiler to make up for fluid lost from the pressure valves. Also most boilers are imperfectly sealed so they leak a little bit. If you do not consider the attached piping, then a boiler would not be considered a closed system since it would be constantly sending out steam and receiving condensate in return.
Why you use the steam trap to separate any liquid content?
A steam trap is used to remove condensate (liquid) that forms in steam systems. If condensate is not removed, it can cause water hammer, reduce heat transfer efficiency, and affect the overall performance of the system. The steam trap helps prevent damage to equipment and ensures that only steam flows through the system.
What is the purpose of the condensate line in an air conditioning system and how does it help in maintaining the efficiency of the AC unit?
The condensate line in an air conditioning system helps to remove excess moisture that is produced during the cooling process. This moisture, known as condensate, is drained through the condensate line to prevent it from accumulating and causing damage to the AC unit. By efficiently removing the condensate, the condensate line helps maintain the proper functioning of the AC unit and prevents issues such as mold growth and reduced efficiency.
If oil is mixed with boiler feed water?
If oil is mixed with boiler feed water, it can cause scaling and fouling in the boiler system, leading to reduced efficiency and potentially damaging the boiler components. It is important to prevent oil contamination of boiler feed water through proper filtration and maintenance of equipment to ensure the smooth operation of the boiler system.
How do close formula feeds differ from open formula feeds?
The feed system cycles between boiler and turbine and enables the steam to return to the boiler as feed water. A closed feed cycles a main propulsion steam run turbine through a high pressure water tube boiler. The condenser, set to a high vacuum, will receive the steam turbine exhaust.
How do close formula feeds differ from open feeds?
The feed system cycles between boiler and turbine and enables the steam to return to the boiler as feed water. A closed feed cycles a main propulsion steam run turbine through a high pressure water tube boiler. The condenser, set to a high vacuum, will receive the steam turbine exhaust.
What are the two chemical used to prevent corrosion in condensate return lines and explain how they provide protection?
There are two different materials on the market today which are being used with good results. These are the neutralizing amines, and the filming amines. The neutralizing amines are volatile alkaline materials. They are primarily effective against carbon dioxide corrosion, but have very little value in combating oxygen corrosion. In your raw water are naturally occurring bicarbonates. As these pass through the heater and into the boiler they are converted to caustic soda. Carbon dioxide gas is given off as a result of this conversion and it passes out of the boiler with the steam. Carbon dioxide is an acid and it dissolves in the condensate as it is formed. This lowers the pH of the condensate to a point where actual acid attack of the pipe occurs. The neutralizing amines simply neutralize this acid. If soda ash is used for boiler water treatment it too breaks down in the boiler to form caustic soda and carbon dioxide. This simply increases the corrosion problem, and, if you are using a neutralizing amine it increases your cost. Inasmuch as caustic soda is already reverted to the final pro- duct, no carbon dioxide is given off in the boiler. This is of course the ad- vantage of caustic over soda ash. Filming amines actually protect the pipe by forming a thin, non-wetable coating on the surface. This separates the pipe from the corrosive condensate and offers excellent protection from both carbon dioxide and/or oxygen corrosion. The filming amines represent a far better material in almost every case. Not only do they provide better protection, they usually cost less as well! The filming amines cannot be mixed with other chemicals, and pure condensate must be used to prepare the feeding solution. However, the filming amines can be fed to the boiler by means of the boiler feed water. it is not necessary to feed it into the steam line. The filming amines have a strong affinity for iron. Therefore they will clean off all of the corrosion products, dirt, and oil that might be inside your condensate return system. This may give some trouble with plugged traps and strainers until the system is cleaned out.
He boiler or system boiler - What is the difference?
He = ASME = heating
