The first type is the bare pipe water wall. This is the simplest structure of the water wall. The advantage is that ordinary seamless steel pipes can be used, and it is more convenient to replace the water wall pipe. The disadvantage is that the temperature of the furnace wall is still high, and heavy refractory bricks are required. The steel frame of the corresponding boiler should be strengthened. , The air leakage of the furnace wall is relatively large. Old-fashioned high-pressure boilers and medium and small boilers are used more frequently.
The second tupe is the membrane water wall. The membrane water wall is welded by seamless steel tubes with fins. The Water Wall Tubes are connected by fins to make the water wall into a whole. This kind of water wall is called a membrane water wall. Its function is to strengthen the heat transfer of the water wall and greatly reduce the temperature of the furnace wall. The furnace wall does not need refractory bricks, but only requires thermal insulation materials. Compared with the conventional heavy furnace wall, the weight can be reduced by 60% ~ 70%, the furnace wall heat storage is reduced by 80%, the start and stop time is shortened, and the fuel consumption is reduced. The load of the furnace steel frame is greatly reduced, saving refractory materials and steel.
The third type is the pierced pipe water wall. The barbed pipe water wall pipe is made by welding many grab nails with a length of 20 to 26 mm and a diameter of 6 to 12 mm on the water wall pipe. It is mainly used to lay the gas belt. Generally, for boilers that burn fuel with low calorific value and low volatile content, in order to stabilize the fire, pierced pipe water walls are often used for laying the fire protection belt.
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CITOTEST Labware Manufacturing Co., Ltd was established in 1996 as a cost-effective manufacturer and supplier for high quality Microscope Slides and Cover Glass.
Through the great team work of R&D, Manufacture and Marketing & Sales, today, CITOTEST has already become the first choice of supplier of high quality Microscope Slides and Cover Glass, as well as the leading supplier of laboratory consumables from China with dedication to Histology & Pathology consumables, Microbiology disposables and other general laboratory products. More than 1000 products are now being supplied and delivered by CITOTEST to more than 250 Customers/Distributors over 90 countries and areas. The brands of CITOTEST, CITOGLAS, CITOPLUS and CITOSWAB have already been world-famous and are being oral-interpreted among more and more professional Customers, Distributors and end users.
View the near future, we CITOTEST with its growing team will continuously develop our product portfolio to meet more comprehensive demands and commit ourselves to delivering partners high quality products and exact solutions.
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CITOTEST Labware Manufacturing Co., Ltd was established in 1996 as a cost-effective manufacturer and supplier for high quality Microscope Slides and Cover Glass.
Through the great team work of R&D, Manufacture and Marketing & Sales, today, CITOTEST has already become the first choice of supplier of high quality Microscope Slides and Cover Glass, as well as the leading supplier of laboratory consumables from China with dedication to Histology & Pathology consumables, Microbiology disposables and other general laboratory products. More than 1000 products are now being supplied and delivered by CITOTEST to more than 250 Customers/Distributors over 90 countries and areas. The brands of CITOTEST, CITOGLAS, CITOPLUS and CITOSWAB have already been world-famous and are being oral-interpreted among more and more professional Customers, Distributors and end users.
View the near future, we CITOTEST with its growing team will continuously develop our product portfolio to meet more comprehensive demands and commit ourselves to delivering partners high quality products and exact solutions.
 
The boiler water wall is the main radiation heat surface, arranged inside the boiler chamber and proceeds the heat exchange directly with the high temperature flame. The convection tubes are the convection heat surface of the boiler, arranged between the boiler chamber outlet and the end heat surface and proceed the heat exchange directly with the high temperature fume. The water wall and convection tubes are the main heat surface of the boiler, the tubes diameter for both generally usedΦ 51-60mm boiler steel tubes, also as the request.
Model NO.: 2120-0521
Origin: Haimen
Model NO.: 2120-0521
Origin: Haimen
Suitable for most specimen, such as from throat, vaginal, skin and wound specimens
Single viscose tip (Ø appr.5 mm, length appr.15mm), on plastic stick (Ø appr.2.5mm, length appr.150mm), flexible and free of loose
during sampling.
Suitable for most specimen, such as from throat, vaginal, skin and wound specimens
Single viscose tip (Ø appr.5 mm, length appr.15mm), on plastic stick (Ø appr.2.5mm, length appr.150mm), flexible and free of loose
during sampling.