Exhaust fans Д18X2, Д20X2, Д21.5X2

Д-13,5х2	Д-15,5х2
Д-18х2	Д-20х2
Д-21,5х2	Д-25х2Ш

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General information

• Мedium and high pressure

• Тwo-way suction

• Left and right rotation

• Forward-bent blades

• 64 blades (32X2)

Forced-draft blower fans can rotate clockwise and counterclockwise (i.e. right and left) if viewed in the direction of the motor.

The scroll casing of the fan is manufactures with the angle of 0- 270at every 15, the fins preventing the installation are slightly cut.

Description

Centrifugal induced-draft fans with two-way suction of DX2 type are used to suck flue gases from stationary steam generator furnaces.

Fans are assembled on pulverized-coal-fired boilers with balanced draft, the steam-generating capacity of which is between 220…480 t/h, which aresupplied with effective ash separators (residual dust content in flue gases does not exceed 1g/m3 , as well as gas-and-oil fired boilers with the balanced draft of the same capacity. Two fans per boiler ensure proper gas path characteristics.

The maximum intake temperature of handled gases should not exceed +250C.

The main components of fans are: the impeller, the carriage, the scroll casing, inlet boxes (left and right) and extract grilles (left and right) with the common drive.

The impeller consists of the forward aerofoil fan and the hob. 64 blades (32X2) are bent forward and molded to the hob. The impeller is placed between two cone disks.

The carriage consists of the shaft, two split bearing cases, two self-aligning double-row ball bearings, two (left and right) seal assemblies, andthe elastic pin bush coupling used to couple the shaft of the unit with the motor shaft.

The scroll casing and inlet boxes are made of sheet and rolled steel. Insulation in the place where the carriage shaft goes through the walls of the inlet boxes prevents hot gases from leaking outside.

Fans have several modifications depending on the configuration of the scroll casing discharge outlets and inlets in the inlet boxes.

Technical specifications of D-type exhaust fans

**Д?2 №13,5?25**
Machine size	Capacity, m3/s	Full pressure, Pa	Maximum efficiency, not less, %	Rotational speed, rpm	Electric motor				Weight without electro motor, kg
Machine size	Capacity, m3/s	Full pressure, Pa	Maximum efficiency, not less, %	Rotational speed, rpm	Size	Power, kWt	Rotational speed, rpm	Voltage, V	Weight without electro motor, kg
Д?13,5?2 (Д?13,5?2ГМ)	77 920	2 340	72	750	А355SMB8	160	750	380/660	4 350 (3 970)
Д?13,5?2 (Д?13,5?2ГМ)	102 500	4 053	72	1 000	ДАЗО4?400ХК?6MУ1	250	1 000	6 000	4 350 (3 970)
Д?15,5?2 (Д?15,5?2ГМ)	85 530	2 480	72	600	ДАЗО4?400У?10MУ1	200	600	6 000	4 980 (4 650)
	107 100	3 110		750	ДАЗО4?400У?8MУ1	250	750	6 000
	140 880	5 380		1 000	ДАЗО4?450Х?6MУ1	500	1 000	6 000
Д?18?2 (Д?18?2ГМ)	151 745	2 610	72	600	ДАЗО4?400У?10МУ1	200	600	6 000	9 080 (7 800)
	190 000	4 092		750	АОД?315/200?8/10У1	315/200	750/600	6 000
					АОД?400/200?8/10У1	400/200	750/600	6 000
					ДАЗО4?450Х?8У1	315	750	6 000
					ДАЗО4?450УК?8У1	400	750	6 000
	249 930	7 080		1 000	ДАЗО4?450У?6МУ1	630	1 000	6 000
	249 930	7 080		1 000	АОД?800?6У1	800	1 000	6 000
Д?20?2 (Д?20?2ГМ)	195 670	3 230	72	600	ДАЗО4?560УК?10У1	630	600	6 000	10 600 (9 100)
	245 000	5 070		750	АОД?800/400?8/10У1	800/400	750/600	6 000
	245 000	5 070		750	ДАЗО4?560УК?8У1	800	750	6 000
Д?21,5?2 (Д?21,5?2ГМ)	279 530	4 760	72	600	ДАЗО4?560ХК?10У1	400	600	6 000	11 700 (10 300)
	279 530	4 760		600	ДАЗО4?560Х?10У1	500	600	6 000
	350 000	5 960		750	ДАЗО4?560Х?8У1	630	750	6 000
					ДАЗО4С?560УК?8У1	800	750	6 000
					ДАЗО4?560У?8У1	1 000	750	6 000
Д?25?2Ш (Д?25?2ШГМ)	541 650	3 400	68	500	АОД?1600?12У1	1 600	500	6 000	23 050 (20 850)
Д?25?2Ш (Д?25?2ШГМ)	650 000	4 900	68	600	АДО?1600?6000?10У1	1 600	600	6 000	23 050 (20 850)

The characteristics are given in the mode of maximum efficiency for the moving medium with parameters: Bar=760 mm Hg. art. and t=100°C.

**Д?2 №13,5?25**
Типоразмер машины	?_ск??_кв	Dimension, mm
Типоразмер машины	?_ск??_кв	B1	B2	B3	B4	H2	H3	H4	L1	L1′	L2	L2′	L3	L3′	L4	L4′	A	A1	b
Д?13,5?2 Д?13,5?2ГМ	45°-125°	?	?	675	575	1 190	1 190	?	?	?	?	?	?	?	165	165	2 930	1 660	820
	45°-135°	?	?	675	575	1 190	1 190	?	?	?	?	?	?	?	165	165
	90°-135°	?	?	675	575	1 125	1 125	?	?	?	?	?	?	?	165	165
	90°-180°	?	?	675	575	1 125	1 125	?	?	?	?	?	?	?	165	165
	?_ск??_кв	Dimension, mm																N	N2
	?_ск??_кв	B5	D	d	d2	C	E	C2	E2	T1	T2	T3	T4	H1	h	h2	L5	N	N2
	?	750	1 350	18	14	790	1 016	1 530	620	884	1 100	1 610	690	335	945	1 200	280	8	20
Д?20?2 Д?20?2ГМ	45°-135°	?	?	785	1 015	1 765	1 765	?	?	?	?	?	?	?	187	187	4 110	2 452	1 215
	90°-135°	?	?	785	1 015	1 630	1 630	?	?	?	?	?	?	?	187	187	4 110	2 452	1 215
	?_ск??_кв	Dimension, mm																N	N2
	?_ск??_кв	B5	D	d	d2	C	E	C2	E2	T1	T2	T3	T4	H1	h	h2	L5	N	N2
	?	1 100	2 000	19	19	1 170	1 504	2 260	920	1 288	1 610	2 328	996	450	1 400	1 720	270	8	22
Д?15,5?2 Д?15,5?2ГМ	0°-90°	?	?	795	535	1 530	1 530	?	?	?	?	?	?	?	184	184	3 280	1 914	941,5
	0°-125°	?	?	795	535	1 530	1 530	?	?	?	?	?	?	?	184	184
	45°-125°	?	?	795	535	1 462	1 462	?	?	?	?	?	?	?	184	184
	45°-135°	?	?	795	535	1 360	1 360	?	?	?	?	?	?	?	184	184
	90°-135°	?	?	795	535	1 280	1 280	?	?	?	?	?	?	?	184	184
	90°-180°	?	?	795	535	1 280	1 280	?	?	?	?	?	?	?	184	184
	?_ск??_кв	Dimension, mm																N	N2
	?_ск??_кв	B5	D	d	d2	C	E	C2	E2	T1	T2	T3	T4	H1	h	h2	L5	N	N2
	?	750	1 550	14	14	906	1 170	1 750	732	1 000	1 302	1 818	792	335	1 085	1 330	280	8	26
Д?21,5?2 Д?21,5?2ГМ	45°-135°	?	?	845	1 105	1 890	1 890	?	?	?	?	?	?	?	187	187	4 296	2 632	1 308
	60°-180°	?	?	845	1 105	1 840	1 840	?	?	?	?	?	?	?	187	187
	90°-135°	?	?	845	1 105	1 780	1 780	?	?	?	?	?	?	?	187	187
	90°-270°	1 440	1 440	1 440	1 440	2 300	2 300	?	1 521	1 521	?	?	1 112	1 112	174	174
	270°-135°	1 505	2 060	845	1 105	1 500	1 500	?	1 698	1 698	?	?	1 010	1 010	187	187
	?_ск??_кв	Dimension, mm																N	N2
	?_ск??_кв	B5	D	d	d2	C	E	C2	E2	T1	T2	T3	T4	H1	h	h2	L5	N	N2
	?	1 100	2 150	20	14	1 260	1 616	2 430	990	1 378	1 722	2 508	1 070	450	1 500	2 000	270	8	34
Д?25?2Ш Д?25?2ШГМ	45°-135°	1 450	1 350	1 450	1 350	2 200	2 200	?	2 858	2 858	?	?	1 058	1 058	578	578	6 450	4 410	1 520
	90°-135°	1 450	1 350	1 450	1 350	2 200	2 200	?	2 858	2 858	?	?	1 058	1 058	578	578
	270°-135°	1 450	1 350	1 450	1 350	2 200	2 200	?	2 858	2 858	?	?	1 058	1 058	578	578
	?_ск??_кв	Dimension, mm																N	N2
	?_ск??_кв	B5	D	d	d2	C	E	C2	E2	T1	T2	T3	T4	H1	h	h2	L5	N	N2
	?	1 140	2 500	24	19	1 500	2 750	3 800	1 620	1 612	2 862	3 780	1 726	510	1 750	2 220	320	18	10
Д?18?2 Д?18?2ГМ	45°-135°	?	?	975	625	1 600	1 600	?	?	?	?	?	?	?	184	184	3 750	2 188	1 095
	90°-135°	?	?	975	625	1 500	1 500	?	?	?	?	?	?	?	184	184
	270°-135°	?	?	975	625	1 260	1 260	?	?	?	?	?	?	?	184	184
	?_ск??_кв	Dimension, mm																N	N2
	?_ск??_кв	B5	D	d	d2	C	E	C2	E2	T1	T2	T3	T4	H1	h	h2	L5	N	N2
	?	1 100	1 800	19	19	1 062	1 330	2 040	830	1 168	1 436	2 116	906	450	1 260	1 550	270	8	22

Aerodynamic performance

Д-13,5×2

Д-15,5×2

Д-18×2

Д-20×2

Д-21,5×2

Д-25×2Ш

Acoustic performance of D-20×2 exhaust fan

**Д?2 №13,5?27,5**
Machine size	n, мin??	Measurement range	The the value of Lpi, dB in the octave band f, Hz							LpA, дБА
Machine size	n, мin??	Measurement range	125	250	500	1000	2000	4000	8000	LpA, дБА
Д?13,5?2 Д?13,5?2ГМ	1 000	Discharge	117	115	117	115	109	104	101	119
		Suction	101	108	102	108	103	102	99	111
		Around the hul	107	108	107	105	98	96	92	109
Д?15,5?2 Д?15,5?2ГМ	750	Discharge	114	102	104	102	107	102	98	111
		Suction	108	107	108	106	101	98	97	110
		Around the hul	104	105	104	102	97	94	90	106
Д?18?2 Д?18?2ГМ	750	Discharge	119	117	119	118	112	107	104	121
		Suction	114	112	114	112	105	104	102	116
		Around the hul	109	110	109	108	101	98	94	112
Д?20?2 Д?20?2ГМ	750	Discharge	123	120	123	122	115	111	107	125
		Suction	107	115	117	114	109	107	105	119
		Around the hul	113	114	112	111	105	102	98	115
Д?21,5?2 Д?21,5?2ГМ	750	Discharge	125	123	125	124	117	113	109	127
		Suction	119	107	119	107	112	109	108	119
		Around the hul	114	115	114	112	107	104	100	116
Д?25?2Ш Д?25?2ШГМ	500	Discharge	121	124	120	117	112	108	103	122
		Suction	116	118	115	112	109	105	101	118
		Around the hul	114	113	110	106	102	98	92	97
	600	Discharge	126	129	126	122	118	114	109	128
		Suction	120	123	121	118	115	111	107	123
		Around the hul	119	118	116	112	108	103	99	118
Д?27,5?2	750	Discharge	131	126	119	117	115	116	114	125
		Suction	131	126	119	117	115	116	114	125
		Around the hul	117	112	105	104	105	104	102	112

NOTE: Acoustic characteristics are given for conditions: the axial guide unit is fully open, Bar=760 mm Hg. art., the temperature of the moving medium t=100°C (t=110°C – for D-27,5?2).