Products

DESCRIPTION

Basic Info

Model NO.	DZL
Function	Steam Boilers
Fuel	Coal/Biomass
Installation	Assembled Boiler
Structure	Water and Fire Tube
Media	Steam
Water Circulation	Natural Circulation
Drum Placement	Horizontal Boiler
Pressure	Low Pressure
Manufacturing Level	B
Burning Style	Chamber Combustion Boiler
Usage	Industrial
Warrant	1 Year
Transport Package	GB
Specification	ISO9001, SGS
Trademark	TECHTOP
Origin	Shandong, China
HS Code	8402190000
Production Capacity	500set/Year

Product Description

		DZL4-1.6-AII	DZL6-1.6-AII	DZL8-1.6-AII	DZL10-1.6-AII	DZL15-1.25-AII	DZL20-1.6-AII	DZL25-1.6-AII	DZL30-1.6-AII
(t/h) Rated evaporation capacity		4	6	8	10	15	20	25	30
(Mpa) Rated working pressure		1.6	1.6	1.6	1.6	1.6	1.6	1.6	1.6
(ºC) Rated steam temperature		204	204	204	204	204	204	204	204
(ºC) Feed water temperature		20	150
() Radiation heating area		12.24	19.2	22.1	24.15	34.5	53.7	99.2
() Convection heat area		89.55	115.3	128	168.2	339.9	411.8	457.8	628.6
() Economizer heat area		28.16	52.3	52.8	130.8	150.4	188	295	413
() Grate effective area		5.18	7.7	9.07	11.53	16.24	22.84	24.7	26.88
Suitable coal type		AII
(kg/h) Coal consumption		615	870	1153	1440	2165	2868	3550	4254
(%) design thermal efficiency		78.45	77.26	80.63	79.7	80.5	81.1	81.2	81.5
Max transport (××)(m)		7.06×2.96×3.60	7.60×2.95×3.70	7.34×3.00×3.70	7.20×3.50×3.70 7.50×2.30×2.60	7.33×3.37×3.70 8.90×3.37×2.50	7.81×3.37×3.51 9.44×3.77×2.60	8.47×2.60×2.74 12.00×8.02×8.90	9.00×2.60×2.85 12.00×8.20×9.70
(t) Max transport weight		30	42	46	25/18.5	27/25	29/28.5	31/33	35/36
I.D fan	type	Y6-41-7.1C	Y6-41-10C	Y9-26-10D	Y6-41-11.2D	Y6-41-11.7C	Y6-41-12.2D
	(kw)electrical power	18.5	37	45	55	75	110
F.D fan	type	G6-41-6.4A	G6-41-7.1A	G4-72-5A	G6-41-8.5A	G6-41-11.7A	G5-56-9A
	(kw)electrical power	5.5	7.5	15	18.5	30	37
Feed water pump	type	1 1/2GC-5×9	2GC-5×7	2GC-5×7	2 1/2-6×8	DG25-30×8	DG25-30×8
	(kw)electrical power	11	22	22	30	45	45
Gear box	type	WT-5	WT-6	WT-6	WT-10	WT-20	WT-20
	(kw)electrical power	0.55	0.75	0.75	1.1	1.5	1.5
Slag removal	type	GBC-4	GBC-6	GBC-8	GBC-10	DGC/S-15	DGC/S-20
	(kw)electrical power	1.1	1.5	1.5	1.5	2.2	2.2
Coal feeder	type	FS-4	FS-6	FS-8	FS-10	FS-15	FS-20
	(kw)electrical power	1.1	1.5	1.5	1.5	2.2 ()	2.2 ()

Brief introduction1.DZL series water and fire tube boiler use a lot of new technologies, for example, thread smoke tube, wing flue, arch-tube plate,self fixture, return water injection, etc. They can not only eliminate the disadvantages of drum deformation,tube sheet crack, water cooling wall burst but also can save energy and be more efficient.2.Smoke circulation: The hot smoke burst from grate erupts from middle of arch ---- rear furnace----wing flue----front smoke chamber----thread smoke tube----rear smoke chamber----flue----economizer----dust collector----induced draft fan----chimney.3.Air flows: forced draft fan----underground wind duct----air chamber at two sides of grate----separated wind chamber under grate-supply air for the burning by ventilation holes opening at the grate. Technical advantages1.Wing flue Cool down smoke in high temperature tube sheet, avoid subcooled boiling, reduce boiler bottom heat load, avoid tube sheet crack, avoid drum deformation.2.Arch tube plate Improve tube sheet flexibility, reduce welding seam thermal stress. Cancel brace and avoid tube sheet crack.3.Thread gas tube Enhance heat transfer,reduce drum size,improve flexibility,reduce welding seam thermal stress. No dust accumulation, avoid tube and sheet crack. Structure characteristic1.The boiler is small and compact. Thread smoke tubes replaces smooth tubes, then the tubes heat transfer efficiency is 1.7-1.8 higher than previous, which decreases boiler required heating surface and boiler volume. This makes the boiler easier to transport, layout, install and reduces engineering cost.2.The boiler mainly adopts thread smoke tubes as convection heating surface. The tubes is laid inside the boiler drum. Then the boiler has a compact structure and prevents cool air permeating into smoke side. Less air leakage lows exhaust smoke loss and improve boiler efficiency.3.Arch tube plate and one-pass thread smoke tube inside the drum effectively avoids tube sheet crack during operation.4.Wing flue covers drum bottom effectively avoids drum bottom deformation during operation. Design characteristicsSoot inertial separation device is set inside boiler and Big volume natural sedimentation chamber is set on the rear arch top. Smoke flow speeds is slow here, some particles in the smoke can be separated out because of gravity. The smoke turns fast at the head of wing flue, and many particles are separated out because of inertia. It lows original emission concentration. The ash in the rear arch can fall on the grate by ash falling hole, then be removed, which decreases secondary pollution. The boiler operates well and turns out that the original emission concentration is less than 2000mg/Nm³. Besides, with the equipped high efficiency dust collector, the boiler emission concentration satisfies national 1-class standard.The intense radiation furnace arch can form reasonable 'A' style fire to prompt the combustion. Water cooling wall forms furnace upon the grate. It is big enough to burn the coal completely. The reasonable arch arrangement ensures flow speed. Meanwhile, the inside thread smoke tube, high efficient burning device, well-designed arches and high quality insulation materials and other characteristics ensure the boiler thermal efficiency is higher than national standard. All the circulation are independent and simple, which greatly avoid water cooling wall crack. Performance characteristics Output1.In design perspective, we design bigger contribution allowance. Our verifying calculation turns out that the contribution allowance is more than 10%. The boiler operation practice indicates that the use of high efficient heat transfer component----thread smoke tube with enough screw thread makes the boiler output 10% high than nameplate rated capacity.2.The equipment operates stably. The reasonable smoke speed enable no ash deposition on the thread smoke tube in the operation. So the boiler output and thermal efficiency won't decrease along with the long operation time. As a result, the boiler can keep ideal sustainable output and efficient. Heat efficientThe sufficient heating surface enables the fuel heat be absorbed amply. Calculation shows that smoke exhaust temperature is at 160ºC. On the other hand, we arrange furnace arch and furnace wall reasonably. The furnace wall is tight while the expansion seam is rational, which decrease cool air leak into boiler. The boiler thermal efficiency is up to 80%. Flexible load regulationBig water volume, high heat storage capacity, nearly 1/3 drum heating surface with many high efficiency thread smoke tube inside the boiler drum apparently reduce boiler heating time.