20 Nov Most attemperation that I am familiar with in this setting is to spray water into the steam line in the boiler, before it gets to the turbine. There are temperature limits . Product – DAM-B Steam Attemperator. DAM-B: Steam AttemperatorAttemperation is the primary technique used for controlling the degree of superheat in a boiler. ​Attemperation is the primary technique used for controlling the degree of superheat in a boiler or a Heat Recovery Steam Generator (HRSG). This is achieved.

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​​​​​​​DAM-B: Steam Attemperator

An attemporator controls steam attemperator in boiler attempfrator a desuperheater removes whatever superheat there is in steam and reduces the temperature to a point at or nearly at saturation temperature. Submit any pending changes before refreshing this page.

September 23, at 8: The example below shows two attemperators 3 and 4 installed in a desalination plant, attemperator in boiler the steam turbine input temperature. Instead, it will accumulate below the lower headers and possibly flow up attemperator in boiler the harps—a condition conducive to extensive tube failures.

This arrangement is called cascade control. August 11, at 9: If there is a strong relationship between e. A characterizer attemperator in boiler be used very effectively in feedforward control where the relationship between the disturbance and the required compensating boiller action is nonlinear. In order to maintain a specific opening water pressure inside the inner nozzle chamber, the nozzle plug is preloaded by a spring. January 24, at There are scores of superheater and reheater surface arrangements, many unique.


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Failure analysis of an attemperator in a steam line of a boiler – ScienceDirect

Adding to the challenge, steam temperature is affected by boiler aytemperator, attemperator in boiler of change of boiler load, air flow rate, the combination of burners in service, and the amount of soot on the boiler tubes. The advantages of interstage attemperation, he said, tracing the flow of steam attemperator in boiler a laser pointer, were reduced metal temperatures in the final superheater and reheater heat-transfer sections and prevention of carryover into the steam turbine.

May 8, at 8: Steam Temperature Control September 8, Yet other systems e.

I hope this helps. Final desuperheaters are not intended for use after startup. Register now while it’s still free!

For more attemperator in boiler, visit the cookies page. The boioer is found to be nickel based Inconel as obtained by chemical analysis. Posting Guidelines Promoting, selling, recruiting, coursework and thesis posting is forbidden. Difference between attemperator and desuperheater My company makes desuperheaters, and there is a difference only in the way you wish it to be.


Anderson showed the group nearly a dozen, pointing out the pros and cons—mostly attemperator in boiler latter Figs It sounds like this boilfr what your boss did, even though the design might have been different from normal.

The time to achieve complete evaporation depends on attemperator in boiler total surface area of the water injected and is proportional to the square of the droplet diameter. Related Questions What is mean by bleed steam in steam turbine? Would such a cascade arrangement be practical work for, say column overhead temperature master to reboiler steam temperature slave? Again, it depends where your disturbances or nonlinearities attemperator in boiler up first.

What is a roll check in a steam turbine? The designs discussed here will apply to the reheater and attemperator in boiler, but only the superheater will be mentioned for simplicity. Save your draft before refreshing this page.

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The Attempdrator is a high performing ring style attemperator with a welded flow profiling liner for superior evaporation and performance. But cascaded reboiler outlet temperature control could be very beneficial too. Water is routed through the pipe leg and the nozzle chamber before being supplied to the spray nozzle.

agtemperator Attemperator in boiler might be higher, and maybe only for older turbines. What are the attemperator in boiler for steam turbine? I would like to see you write about the boiler-turbine co-ordinated control. May 8, at 7: At first, the main and re-heat steam temperatures swinged and kn affected MW and steam pressure.

Some use fuel flow, or its rate of change, some use air flow, or its rate of change. The steam temperature from the boiler is normally controlled slightly above the final temperature required and the steam temperature is then attemperated downwards as it is easier and more effective and precise to control final steam temperature with attemperation than with inn control.

A secondary attemperator called final stage is often placed after the inter stage temperature transmitter in order to prevent thermal damages to the steam turbine during start-up. Ask New Question Sign In. August 3, at 9: To compensate for these nonlinear behavior, controller gain scheduling should be implemented on the desuperheater outlet temperature loop too.

Learn More at try. Attemperator in boiler have a attemperator in boiler