間接加熱（冷凝）熱水鍋爐

冷凝間接加熱熱水鍋爐的下半部結構與普通鍋爐一樣，由燃燒室與傳熱管組成；上半部分裝有熱交換器，爐體上部裝設有膨脹水箱，由于鍋爐整體是在常壓狀態下，故絕對安全。尾部煙道加裝冷凝器，提高熱效。爐內的熱媒水，在鍋爐運行的全過程中，不進、不出，與熱交換器之間傳遞熱量。換熱器嚴格按照管殼式換熱器制造標準制造，殼程和管程分別作水壓試驗。

冷凝熱水鍋爐爐體上部設有膨脹水箱，水位自動控制，無壓運行，安全可靠，簡化了繁雜的報批手續。

冷凝熱水鍋爐爐水只作熱載體使用，在運行時，水中的氧加熱析出，排出爐外，爐內長期使用不會發生氧腐蝕，一次性加入熱媒水，有限少量的鈣鎂離子亦被加熱軟化，運行時爐水不增不減，因此鍋爐內部不發生結垢，延長了鍋爐使用壽命，是一般鍋爐壽命2倍以上，長達20年。

冷凝熱水鍋爐（間接加熱熱水鍋爐）模塊化設計，高性能換熱組件，機組結構緊湊，使產品易于運輸、安裝，在小空間內，多臺機組可并聯使用，其工藝系統也很簡潔，免去了換熱站的設計與施工，工程費用省。

The structure of lower part of the indirect heating boiler is the same as the regular one.It is composed of the firebox and heat transfer tubes.The upper part is equipped with a heat exchanger.Thereis also an expansion tank at the top .Generally ,the boiler works  under normal pressure ,so it is absolutely safe .The thermal media in the boiler is not in or out when the boiler is working.It transfers the heat between heat transfer tube and heat exchanger .After being heated ,the thermal media will oxygenate and intenerate ,and there is no furring and oxygen corrosion.These make the using life of the boiler last as 20 years.Build in heat exchanger is manufactured to comply with manufacturing standard of shell-and-tube heat exchanger.Tube pass and shell pass are put to test of water pressure.

An expansion tank is equipped at the top.Water level can be controlled automatically .It works without pressure ,so it is safe and reliable .Tedious report-and –endorse procedures are simplified.

Boiler water is only used as thermal carrier ,when it is heated,the oxygen will be decomposed and discharged out,so oxygen corrosion won’t happen .When thermal media water is added once ,a few calcium and magnesuim ions will be heated and be intenerated .Boiler water won’t decrease when boiler is working ,so there is no furring inside .All these contribute to long life efficiency.Weining boiler’s life is about 2 times longer than regular boilers .Heat exchanger is made of stainless steel tubes which are corrosion-resistant and rust free ,offering clean and hygienic hot domestic water.

Indirect heating boiler adopts modular design .Heat exchanger units with high performance are used , the whole structure compact which make it easy to transpaort and mount .In the limited space ,two or more sets can be paralleled in use and the technology is simple ,so it needn’t heat exchange station and lower the cost of engineering.