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Address: Address: N0.1, Dongli Road, Donglai, Zhangjiagang City, Jiangsu Province, China
Contact name:Sandy Chen
Zhangjiagang HuaDong Boiler Co., Ltd. |
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ASME or Ce Standard Membrane Water Wall of 220 T/H CFB Boiler Water Cooling System
Introduction
HDB provides replacement wall panels, burner openings, inspection ports and doors for utility and industrial boilers. Our membrane water wall are manufactured using high grade raw material and contemporary production equipment at our advanced manufacturing unit. The offered range is available in various sizes, shapes and specifications, as per the requirements of our esteemed clients. Further, these are delivered to the clients within promised time frame.
Boiler water walls are membrane walls that are made of tubes welded together with or without a strip of metal in between. These walls form the enclosure of the coal combustion chamber. Water wall tubes are also referred to as the evaporator section; they contain water mostly in liquid form which gradually evaporates as it rises in the boiler.
Advantages of Membrane Water Wall
1). To guarantee the leakproofness of furnace wall and reduce the air leak of combustion chamber.
2). To achieve the full water cooling of combustion chamber, and the boiler accessories membrane water wall is benefit to prevent coking under the condition of supplemental firing.
3). The thermal storage capacity is small, the warming of combustion chamber is fast and the cooling is also fast, which could shorten the cooling time of boiler’s start and furnace shut down.
4). It is good to adopt top supported water cooled wall and it could reduce the load of boiler framework, which is benefit to overhang.
Additional
| 1 | Water wall panels are used in Waste Heat recovery boilers. |
| 2 | We manufacture Water wall panels,these are fabricated out of carbon steel tubes to customers' drawings and specifications. |
| 3 | Special care is taken for ovality and thinning at the bent portion,during fabrication. |
| 4 | We are manufacturing and supplying a comprehensive range of Waterwall Panels. |
| 5 | The tubes offered by us are known to withstand a great internal pressure as a continual strip of fin material is wound spirally on the tube. |
| 6 | These tubes are known to provide heat uniformly that result in an increased heat output. |
| 7 | The main function of water wall panels in boiler is to absorb the
heat generated by high temperature flame or flue and to generate
steam or hot water in tubes, hence to reduce the temperature in the
chamber. |
Application
| 1 | Energy saving enviromental protection china supplier membrane water wall for CFB boiler are membrane walls that are made of tubes welded together with or without a strip of metal in between. |
| 2 | These walls form the enclosure of the coal combustion chamber. |
| 3 | Water wall tubes are also referred to as the evaporator section; they contain water mostly in liquid form which gradually evaporates as it rises in the boiler. |
Note
| 1 | Control of weld penetration to satisfy mechanical and heat transfer requirements Control of the deformation to acceptable tolerances. |
| 2 | Panels routinely require straightening in the workshop after welding and heat treatment, the question to be answered is can the shop then meet the required dimensional tolerances for successful site installation? |
| 3 | Can existing shop handling procedures be used as-is without adding excessive controls that will add cost and schedule. |
| 4 | The importance of preheating and its maintenance through the
welding process could cause a number of handling and shop
processing issues that will substantially increase cost. |
Membrane/Water Wall Material and Arrangement:
The furnace and roof are made up of membrane water wall and hung on
the steel structure by upper hanging suspender of water cooling
upper header. Furnace intersecting surface is 3170×5290mm2 and the
elevation of top furnace is 28877mm. The membrane water wall is
made up of φ60×5 and 6×45 welding steel flat. The combustion
chamber is made of φ60×4 steel tube and welded with pin to fasten
refractory material. The upper part of combustion chamber connects
with furnace membrane water wall. The lower part connects with
water cooling wind chamber and water cooling air distributor. The
water cooling wind chamber is made up of φ60 steel tube and welded
with pins to fasten the refractory material. The water cooling
distributor is welded with φ60 steel tube and 6X45 steel flat. The
small holes on the steel flat connects with the funnel cap.
The furnace divides left, right, front and back water circulation
circuit. The steam leading tube is made up of φ133×5 and φ108×4.5
steel tube. The downcomer is made up of φ108×4.5 steel tube.
Install the blowdown valve under the lower header to periodic blow
down.
