排汽压力大于大气压力的汽轮机称为为背压汽轮机。排汽可用于供热或供给原有中、低压汽轮机以代替老电厂的中、低压锅炉。后者又称为前置式汽轮机,它不但可以增加原有电厂的发电能力,而且可以提高原有电厂的热经济性。供热用背压式汽轮机的排汽压力设计值视不同供热目的而定;前置式汽轮机的背压常大于 2兆帕,视原有机组的蒸汽参数而定。排汽在供热系统中被利用之后凝结为水,再由水泵送回锅炉作为给水。一般供热系统的凝结水不能全部回收,需要补充给水。
运行原理
背压式汽轮机发电机组发出的电功率由热负荷决定,因而不能同时满足热、电负荷的需要。背压式汽轮机一般不单独装置,而是和其他凝汽式汽轮机并列运行,由凝汽式汽轮机承担电负荷的变动,以满足外界对电负荷的需要。前置式汽轮机的电功率由中、低压汽轮机所需要的蒸汽量决定。利用调压器来控制进汽量,以维持其排汽压力不变;低压机组则根据电负荷需要来调节本身的进汽量,从而改变前置式汽轮机的排汽量。因此,不能由前置式汽轮机直接根据电负荷大小来控制其进汽量。
由于供热背压式机组的发电量决定于热负荷大小,宜用于热负荷相对稳定的场合,否则应采用调节抽汽式汽轮机。
背压式汽轮机的排汽压力高,蒸汽的焓降较小,与排汽压力很低的凝汽式汽轮机相比,发出同样的功率,所需蒸汽量为大,因而背压式汽轮机每单位功率所需的蒸汽量大于凝汽式汽轮机。但是,背压式汽轮机排汽所含的热量绝大部分被热用户所利用,不存在冷源损失,所以从燃料的热利用系数来看,背压式汽轮机装置的热效率较凝汽式汽轮机为高。由于背压式汽轮机可通过较大的蒸汽流量,前几级可采用尺寸较大的叶片,所以内效率较凝汽式汽轮机的高压部分为高。
在结构上,背压式汽轮机与凝汽式汽轮机的高压部分相似。背压式汽轮机多采用喷嘴调节配汽方式,以保证在工况变动时效率改变不大。因背压机常用于热负荷较稳定的场合,一般采用单列冲动级作为调节级。
可根据用户需求设计机型
性能特点:
1、有单级和多级汽轮机供用户选择,功率从100KW到50MW,满足各种行业、各种条件下的使用要求。
2、工作性能稳定,易操作。
3、单级汽轮机结构简单,便于安装,适应性好,多用于驱动供热水泵等小功率设备。
4、可选用全液压调节和电液调节。
5、具备完全功能的保安系统。
技术参数:
型号
Model
|
本厂代号
Code
|
功率
Capacity
(MW)
|
进汽参数
Inlet
|
排汽压力
Exhaust
Pressure
(MPa)
|
汽耗Consumption
(kg/kw.h)
|
本体重量
Weight
(t)
|
外型尺寸
Overall
Dimensions
LxWxH(mm)
|
转速
Speed
(r/min)
|
压力
Pressure
(MPa)
|
温度
Temp
(℃)
|
进汽量
Flow
(t/h)
|
B0.5-2.35/0.490
|
N1321B
|
0.5
|
2.35
|
390
|
9.37
|
0.49
|
18.77
|
5.2
|
2850x1945x1934
|
6500
|
B0.025-0.3
|
N10
|
0.025-0.3
|
0.5-3.5
|
450
|
/
|
0.2-1.0
|
/
|
|
1720x1260x1000
|
3000
|
B0.2-0.6
|
N20
|
0.2-0.6
|
0.5-3.5
|
450
|
|
0.2-1.0
|
|
|
1720x1260x1000
|
3000
|
B0.5-1.0
|
N30
|
0.5-1
|
0.5-3.5
|
450
|
|
0.2-1.0
|
|
|
1820x1330x1400
|
3000
|
B0.5-1.5
|
N40
|
0.5-1.5
|
0.5-3.5
|
450
|
|
0.2-1.0
|
|
|
2160x1600x1800
|
3000
|
B0.5-3.43/0.490
|
N142B
|
0.5
|
3.43
|
435
|
7.8
|
0.49
|
15.60
|
5.2
|
2850x1945x1934
|
6500
|
B0.75-2.35/0.490
|
N1322B
|
0.75
|
2.35
|
390
|
13
|
0.49
|
17.33
|
5.2
|
2850x1945x1934
|
6500
|
B0.75-3.43/0.490
|
N1421B
|
0.75
|
3.43
|
435
|
11
|
0.49
|
14.67
|
5.2
|
2850x1945x1934
|
6500
|
B1.0-2.35/0.490
|
N1323B
|
1
|
2.35
|
390
|
16.5
|
0.49
|
16.50
|
5.2
|
2850x1945x1934
|
6500
|
B1.0-3.43/0.490
|
N1422B
|
1
|
3.43
|
435
|
14.12
|
0.49
|
14.12
|
5.2
|
2850x1945x1934
|
6500
|
B1.5-2.35/0.294
|
N231B
|
1.5
|
2.35
|
390
|
18.6
|
0.294
|
12.40
|
15.1
|
3097x2802x2515
|
3000
|
B1.5-2.35/0.490
|
N2321B
|
1.5
|
2.35
|
390
|
23.8
|
0.49
|
15.87
|
5.2
|
2850x1945x1934
|
6500
|
B1.5-2.35/0.490
|
N232B
|
1.5
|
2.35
|
390
|
20.8
|
0.49
|
13.87
|
8.4
|
3105x2185x1952
|
6500
|
B1.5-2.35/0.785
|
N233B
|
1.5
|
2.35
|
390
|
33
|
0.785
|
22.00
|
13
|
3293x2802x2513
|
3000
|
B1.5-2.35/0.981
|
N234B
|
1.5
|
2.35
|
390
|
39.8
|
0.981
|
26.53
|
13
|
3293x2802x2513
|
3000
|
B1.5-2.35/0.294
|
N2312B
|
1.5
|
2.35
|
390
|
16.3
|
0.294
|
10.87
|
8.9
|
3210x2188x1950
|
3000
|
B1.5-3.43/0.490
|
N2421B
|
1.5
|
3.43
|
435
|
16.9
|
0.49
|
11.27
|
5.2
|
2850x1945x1934
|
6500
|
B1.5-3.43/0.686
|
N2431B
|
1.5
|
3.43
|
435
|
19.9
|
0.686
|
13.27
|
5.2
|
2850x1945x1934
|
6500
|
B1.5-3.43/0.8
|
N2423B
|
1.5
|
3.43
|
435
|
19.65
|
0.8
|
19.77
|
5.2
|
2850x1945x1934
|
6500/1500
|
B1.5-3.43/0.981
|
N244B
|
1.5
|
3.43
|
435
|
27.6
|
0.981
|
18.40
|
14.8
|
3100x2805x2515
|
3000
|
B1.5-3.43/0.981
|
N2441B
|
1.5
|
3.43
|
435
|
25.4
|
0.981
|
16.93
|
9.1
|
3205x2195x1952
|
6500
|
B1.5-3.43/1.27
|
N245B
|
1.5
|
3.43
|
435
|
33.3
|
1.27
|
22.20
|
14.5
|
3100x2805x2515
|
3000
|
B1.5-3.43/1.27
|
N2451B
|
1.5
|
3.43
|
435
|
32.02
|
1.27
|
21.35
|
7.9
|
3000x2185x1950
|
6500
|
B2.24-2.35/0.3
|
N2322B
|
2.24
|
2.35
|
390
|
24.4
|
0.3
|
10.89
|
12.5
|
3655x2200x1950
|
5600
|
B3-2.35/0.294
|
N331B
|
3
|
2.35
|
390
|
35.2
|
0.294
|
11.73
|
16.3
|
3730x2805x2465
|
3000
|
B3-2.35/0.490
|
N332B
|
3
|
2.35
|
390
|
42.4
|
0.49
|
14.13
|
16.5
|
3750x2802x2460
|
3000
|
B3-3.43/0.294
|
N341B
|
3
|
3.43
|
435
|
27.3
|
0.294
|
9.10
|
18.5
|
2925x2802x2515
|
3000
|
B3-3.43/0.490
|
N342B
|
3
|
3.43
|
435
|
32.2
|
0.49
|
10.73
|
17.9
|
2925x2805x2515
|
3000
|
B3-3.43/0.785
|
N343B
|
3
|
3.43
|
435
|
42.8
|
0.785
|
14.27
|
16.7
|
3928x2800x2515
|
3000
|
B3-3.43/0.981
|
N3441B
|
3
|
3.43
|
435
|
48.1
|
0.981
|
16.03
|
17.2
|
3928x2800x2515
|
5600/3000
|
B3-3.43/0.981
|
N344B
|
3
|
3.43
|
435
|
48
|
0.981
|
16.00
|
18.9
|
3928x2800x2515
|
3000
|
B3-3.43/1.57
|
N347B
|
3
|
3.43
|
435
|
80.1
|
1.57
|
26.70
|
12.8
|
3280x2805x3465
|
3000
|
B3-4.90/0.294
|
N351B
|
3
|
4.9
|
470
|
25
|
0.294
|
8.33
|
21.8
|
4380x2805x2615
|
3000
|
B3-4.90/0.981
|
N354B
|
3
|
4.9
|
435
|
43
|
0.981
|
14.33
|
20.8
|
4365x2805x2615
|
3000
|
B3.4-3.09/1.9
|
N348B
|
3.4
|
3.09
|
347
|
152.1
|
1.9
|
44.74
|
39
|
4450x4135x2650
|
3000
|
B4-2.35/0.49
|
N4321B
|
4
|
2.35
|
390
|
55.9
|
0.49
|
13.98
|
18
|
2925x2805x2515
|
3000
|
B4-2.35/0.981
|
N434B
|
4
|
2.35
|
390
|
100.5
|
0.981
|
25.13
|
12.8
|
3280x2805x3465
|
3000
|
B4-3.43/0.49
|
N4421B
|
4
|
3.43
|
435
|
48.5
|
0.49
|
12.13
|
18
|
2925x2805x2515
|
3000
|
B4-3.43/0.981
|
N4441B
|
4
|
3.43
|
435
|
69
|
0.981
|
17.25
|
17
|
2925x2805x2515
|
3000
|
B4-3.43/1.27
|
N4451B
|
4
|
3.43
|
435
|
88.2
|
1.27
|
22.05
|
20.5
|
4380x2805x2615
|
3000
|
B4-4.9/0.490
|
N4521B
|
4
|
4.9
|
435
|
40
|
0.49
|
10.00
|
18.2
|
2925x2805x2515
|
3000
|
B4-4.9/0.981
|
N4541B
|
4
|
4.9
|
435
|
54
|
0.981
|
13.50
|
20.8
|
4365x2805x2615
|
3000
|
B4-4.9/1.27
|
N4551B
|
4
|
4.9
|
435
|
67.9
|
1.27
|
16.98
|
19.7
|
4365x2805x2615
|
3000
|
B5-2.35/0.49
|
N4322B
|
5
|
2.35
|
390
|
68
|
0.49
|
13.60
|
13.5
|
3750x2802x2460
|
3000
|
B5-2.35/0.981
|
N4341B
|
5
|
2.35
|
390
|
123.8
|
0.981
|
24.76
|
15.3
|
3750x2802x2460
|
3000
|
B5-3.43/0.49
|
N4422B
|
5
|
3.43
|
435
|
54.3
|
0.49
|
10.86
|
18
|
3925x2805x2515
|
3000
|
B5-3.43/0.981
|
N4442B
|
5
|
3.43
|
435
|
81
|
0.981
|
16.20
|
21.2
|
4380x2805x2615
|
3000
|
B5-3.43/1.27
|
N4452B
|
5
|
3.43
|
435
|
101.6
|
1.27
|
20.32
|
16.1
|
3905x2805x2515
|
3000
|
B5-4.9/0.49
|
N4522B
|
5
|
4.9
|
435
|
49.6
|
0.49
|
9.92
|
21
|
4402x2805x2615
|
3000
|
B5-4.9/0.981
|
N4542B
|
5
|
4.9
|
435
|
66.8
|
0.981
|
13.36
|
19.7
|
4402x2805x2615
|
3000
|
B5-4.9/1.27
|
N4552B
|
5
|
4.9
|
435
|
76.4
|
1.27
|
15.28
|
19.1
|
4402x2805x2615
|
3000
|
B6-2.35/0.294
|
N431B
|
6
|
2.35
|
390
|
62.1
|
0.294
|
10.35
|
16.3
|
4069x2805x2515
|
3000
|
B6-2.35/0.490
|
N432B
|
6
|
2.35
|
390
|
76
|
0.49
|
12.67
|
16.6
|
3905x2805x2515
|
3000
|
B6-3.43/0.294
|
N441B
|
6
|
3.43
|
435
|
54.1
|
0.294
|
9.02
|
18
|
3925x2805x2515
|
3000
|
B6-3.43/0.490
|
N442B
|
6
|
3.43
|
435
|
63.8
|
0.49
|
10.63
|
18
|
3925x2805x2515
|
3000
|
B6-3.43/0.686
|
N443B
|
6
|
3.43
|
435
|
75.8
|
0.686
|
12.63
|
16
|
3925x2805x2515
|
3000
|
B6-3.43/0.981
|
N444B
|
6
|
3.43
|
435
|
93.6
|
0.981
|
15.60
|
16
|
3925x2805x2515
|
3000
|
B6-3.43/1.27
|
N445B
|
6
|
3.43
|
435
|
118.6
|
1.27
|
19.77
|
16.1
|
3905x2805x2515
|
3000
|
B6-4.90/0.490
|
N452B
|
6
|
4.9
|
435
|
55.2
|
0.49
|
9.20
|
21.6
|
4380x2805x2615
|
3000
|
B6-4.90/0.785
|
N453B
|
6
|
4.9
|
435
|
67.2
|
0.785
|
11.20
|
20.8
|
4365x2805x2615
|
3000
|
B6-4.90/0.981
|
N454B
|
6
|
4.9
|
435
|
78.15
|
0.981
|
13.03
|
21.2
|
4380x2805x2615
|
3000
|
B6-4.90/1.18
|
N455B
|
6
|
4.9
|
435
|
82.2
|
1.18
|
13.70
|
21.2
|
4365x2805x2615
|
3000
|
B6-4.90/1.96
|
N458B
|
6
|
4.9
|
435
|
128.2
|
1.96
|
21.37
|
18
|
3710x2805x1865
|
3000
|
B6-5.88/0.981
|
N464B
|
6
|
5.88
|
435
|
68.4
|
0.981
|
11.40
|
25.1
|
4380x2800x2620
|
3000
|
B6-8.83/3.6
|
N479B
|
6
|
8.83
|
535
|
111
|
3.6
|
18.50
|
50.5
|
5740x3280x3290
|
3000
|
B7-3.43/(0.981)/0.490
|
N5431B
|
7
|
3.43
|
435
|
75.8
|
0.49
|
10.83
|
13.5
|
3950x2820x2520
|
3000
|
B7.5-3.43/1.08
|
N545B
|
7.5
|
3.43
|
435
|
124
|
1.08
|
16.53
|
13.5
|
3950x2820x2350
|
3000
|
B7.5-4.90/0.981
|
N5542B
|
7.5
|
4.9
|
470
|
89.5
|
0.981
|
11.93
|
20
|
4450x2820x2620
|
3000
|
B12-3.43/0.49
|
N542B
|
12
|
3.43
|
435
|
116
|
0.49
|
9.67
|
42.5
|
5050x4120x2650
|
3000
|
B12-3.43/0.785
|
N5431B
|
12
|
3.43
|
435
|
147
|
0.785
|
12.25
|
21
|
4820x4135x2650
|
3000
|
B12-3.43/0.981
|
N544B
|
12
|
3.43
|
435
|
176
|
0.981
|
14.67
|
17.5
|
4450x4150x2620
|
3000
|
B12-4.90/0.490
|
N552B
|
12
|
4.9
|
435
|
104
|
0.49
|
8.67
|
44.5
|
4800x4150x2650
|
3000
|
B12-4.90/0.686
|
N553B
|
12
|
4.9
|
435
|
120
|
0.686
|
10.00
|
44.5
|
4800x4150x2650
|
3000
|
B12-4.90/0.981
|
N554B
|
12
|
4.9
|
435
|
146
|
0.981
|
12.17
|
44.5
|
4800x4150x2650
|
3000
|
B12-4.90/1.27
|
N555B
|
12
|
4.9
|
435
|
175.1
|
1.27
|
14.59
|
39
|
4450x4135x2650
|
3000
|
B12-8.83/0.785
|
N573B
|
12
|
8.83
|
535
|
95
|
0.785
|
7.92
|
60
|
|
3000
|
B12-8.83/4.12
|
N579B
|
12
|
8.83
|
535
|
248
|
4.12
|
20.67
|
48.5
|
5740x3250x3300
|
3000
|
B15-1.96/0.147
|
N631B
|
15
|
1.96
|
340
|
128.5
|
0.147
|
8.57
|
42
|
5120x4120x2650
|
3000
|
B15-3.43/0.294
|
N3641B
|
15
|
3.43
|
435
|
117
|
0.294
|
7.80
|
42
|
4825x4120x2650
|
3000
|
B15-4.90/(0.981)/0.294
|
N651B
|
15
|
4.9
|
435
|
111
|
0.294
|
7.40
|
42
|
5000x4120x2650
|
3000
|
B25-8.83/0.981
|
N774B
|
25
|
8.83
|
535
|
216
|
0.981
|
8.64
|
62.8
|
5940x3515x3295
|
3000
|
B25-8.83/1.2
|
N775B
|
25
|
8.83
|
535
|
236
|
1.2
|
9.44
|
62.8
|
5940x3515x3295
|
3000
|
B50-8.83/0.294
|
N871B
|
50
|
8.83
|
535
|
367
|
0.294
|
7.34
|
104
|
7795x3603x3505
|
3000
|
B50-8.83/1.28
|
N872B
|
50
|
8.83
|
535
|
425
|
1.28
|
8.50
|
76
|
7510x3390x3480
|
3000
|