membrane wall from China manufacturer - Zhengzhou Boiler Co., Ltd.

Payment Terms:	T/T,L/C
Place of Origin:	Henan, China (Mainland)


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Product Detail

Means of Transport: Ocean

Packing: standard export package

Fuel: Coal-fired

Usage: Industrial

Pressure: Low Pressure

Production Capacity: 100 Set/Sets per Year

Delivery Date: 3 months

Output: Steam/Hot Water

Structure: Water/fire Tube

Double Wings Gas Ducts structure. Boiler uses Membrane Water-cooling Wall wich has the features of small occupation, bigger output, quick pressure .

This boiler with Membrane Water-cooling Wall is steam boiler of horizontal type, single drum with traveling chain grate. The threaded gas pipe is inside the boiler drum, and both side water-cooling wall rounds thumb flue in drum's belly. This structure protects effectively the boiler drum and avoids the belly directly radiated by fire. Boiler drum connects the two headers by two side water cooling wall. Four downcast pipes are foreside and rearward of boiler drum, and every pipe is led from drum to header. By this design, the drum and headers becomes a circulation loop together with the two sides water-cooling walls.

During running, high temperature gas and ash come into soot separator from smokestack of rear arch blocking-smoke wall, then from thumb flue to front smoke chamber, then to threaded gas pipe passing single pass scour flue, finally through rear smoke box to tail flue.

Boiler heat surface includes four parts: boiler furnace radiation heat surface (right and left water-cooling wall), first bank of tubes convection heat surface, second bank of tubes convection heat surface, tail heat surface (economizer)

NO.	Method	Function	Aim
1	Single Pass Threaded Gas Tube	Remove welding thermal stress of tube end from double pass	Prevent breakage of tube-plate
		Improveflexibility	Prevent breakage of tube-plate
		The tube water side scale-forming iseasy to drop, improve gas disturbance, strengthen heat transmission	Improveheat efficiency
		Nofouling, no need soot blowing	Improveheat efficiency
2	Thumb gas duct	Reduceinlet gas temperature of high-temp tube-plate Reducewelding thermal stress of tube-plate	Prevent the breakage of front tube-plate
2	Thumb gas duct	Reduce heat loading of drum bottom, strengthendisturbance of drum bottom, prevent accumulation of dust	Prevent drum protruding
3	Arch Tube-plate	Improveflexibility, Remove welding thermal stress of tube end	Prevent breakage of tube-plate
4	Big size down comer	Reduce resistance of downcomer, improver water speedof ascending pipe, the water circulation is more reliable.	Preventbreakage of tubes
5	Gas and dust separation in boiler	Separate gas and dust	Reduce smoke concentration
6	Independent air chamber, send air from two sides	Send air evenly	Improve heat efficiency and prevent partial burning
7	Rolling wheel device under chain grate	Change sliding friction to rolling friction	Reduce resistance and improve life of chain grate.
8	New type chain plate	With better tensile fatigue strength, more flexibility for coal andbetter burning effect.	Improve reliability
9	Single drum water and fire tube drum	Reduce dimension of the boiler, improve water volume in boiler comparingwith other type same capacity boiler	Improve reliability of boiler and flexibility of loading change