Bi-drum boilers are used for purposes of power generation and as process steam generators. This type of boiler is used up to 100MW for generating power. Bi-drum boilers are non-reheat units which are getting wiped out due to high heat rate of the plant. These boilers are used for generating high steam pressure which is used for power generation owing to their ability to accommodate high load of fluctuation and respond to load changes with more agility compared a single drum boiler.
The two drums in the bi-drum boiler are connected using a large number of convective heat transfer tubes known as bank tubes or boiler bank tubes. These tubes are about one thousand in number. The bank tubes and the drum at the bottom that contains water will have a water level that will be up to the normal working level of water in the upper drum.

The water availability in the bi-drum boiler makes it very adoptable for large load changes. Flue gases enter the bank tubes which are placed towards the furnace side and the tubes act like raisers to contain the mixture of steam and water. The load impacts the number of rows of bank tubes that act like raiser tubes. The remaining rows of bank tubes act as downcomer tubes between the upper and lower drum.


The boiler bank must maintain a temperature such that the flue gas exiting the bank tubes remains constant at all operating loads. During load changes that are fast or slow under armour rocket sale , the number of raiser tube rows increase and the downcomer tubes decrease to ensure that more steam in the steam drum surges upward almost instantaneous.
Bank tubes are placed in the upper and lower drum holes, and expand as operating pressure changes.


Boilers are classified on many factors such as usage, fuel fired, fuel firing system under armour newell ridge sale , and type of arrangement. Commonly known boiler types are pulverized coal fired boilers, super critical boilers, oil and gas fired boilers. All of these cater to industrial and power generation.


Boilers can be designed as two pass boilers and tower boilers. The tower type boiler is adopted for highly erosive high ash coal.


Carbon emissions are a major concern today. It is natural for super critical pressure units to be preferred as they increase plant cycle efficiency. This will make once through type boilers take over from drum type boilers.


Thermax provides the best quality boiler drums in the India and is a global leader in the heat treatment process sector. Powermax, one of Thermax鈥檚 two-drum water tube boiler is used to combust a wide variety of fuels. It is suited for applications that need uninterrupted boiler operation even on fuel which have a high fouling tendency. Thermax also provides bi-drum boilers which are rugged in nature and can operate all throughout the year. To learn more about the best heat treatment equipment visit Total Views: 2Word Count: 477See All articles From Author


GAZA under armour speedform slingride tri sale , Aug. 19 (Xinhua) -- The Islamist Hamas movement denied on Tuesday firing four rockets from the Gaza Strip into Israel, holding the Jewish state responsible for the ongoing escalation.


Sami Abu Zuhri, Hamas spokesman in Gaza, said in an emailed press statement that "Hamas doesn't have any information on launching any rockets from Gaza."


"The Israeli occupation is aiming through this escalation in the region to abort the talks in Cairo under armour speedform velociti sale ," he said, adding "The occupation is fully responsible for this escalation and all the consequences that would come out of it."


A 24-hour cease-fire agreement reached in Cairo between Israel and the Palestinians was violated when unidentified militants fired rockets from the Gaza Strip into Israel. Israeli war jets responded by striking the densely-populated enclave.


Eyewitnesses said that three rockets were fired on Tuesday afternoon. Israeli Radio reported that the three rockets landed in an empty area near the southern Israeli city of Beer Sheba.


Later, security officials in Gaza said that Israeli war jets carried out several successive airstrikes on northern, central and southern Gaza Strip under armour speedform apollo gr II sale , adding that several huge explosions were heard in the enclave.


Ashraf al-Qedra, the health ministry spokesman in Gaza told reporters that five Palestinians, including two children were injured in one of Israel's airstrikes on Rafah town in Gaza's southeast.


The renewed fighting between the two sides came as Egypt has been hosting indirect talks between Israel and a Palestinian delegation representing Islamist and national factions, including Hamas and the Islamic Jihad.


Officials and reports coming from Cairo say that reaching a permanent cease-fire is unlikely due to the stark differences between the two sides.


"If Netanyahu doesn't understand well the message and the demands of Gaza through the political language of negotiations in Cairo under armour speedform eurapa sale , we know very well the way that obliges him to understand," Fawzi Barhoum, a spokesman of Hamas movement, said in an emailed press statement.


The Palestinians are demanding a complete lifting of Israel's blockade under armour threadborne slingflex sale , which has been imposed on the Gaza Strip after Hamas' violent takeover of the territories in 2007. Israel has demanded that Hamas should be completely disarmed and the Gaza Strip demilitarized.


Abu Zuhri blamed Israel for the stalemate in the negotiations.


"The occupation is wasting opportunities and should stop playing the game of time. Hamas reiterates its readiness to deal with all possibilities and any development," he added.


Israel began its large-scale ground and air offensive on the Gaza Strip on July 8 purportedly to rein in Gaza militants and stop rocket fire targeting Israel. Around 2,016 Palestinians, most of whom are civilians under armour threadborne fortis 3 sale , and 68 Israelis have since been killed during the military campaign, while more than 10,000 Palestinians have been wounded.


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