JB/T 6470.2-1992 Technical conditions for steam turbine injection air extractor
Some standard content:
K54
JB
Pressing Machinery Ring Industry Standard JB/T6470.21992
1992-08-064
e
14||tt ||1993-01-01
1
2 0P UxEe/
Invitation
This standard specifies the design, performance, manufacturing and Technical requirements for inspection. JB/T6470.2±1992
This standard is mainly applicable to the steam ejection air extractor (hereinafter referred to as the air extractor) supporting the steam turbine condensation equipment for power generation. Other air extractors can also be used as a reference.
2 reference standards
JB4056
ZBK54017
ZBK54012
ZBK54038
GB700
GB4228
GB1176
ZBK54005
GB 711
GB8890
GB2270
JB4058
GB3323
GB/T13306
JB2900
JB2901
JB2862
JB/Z164
JB/Z163
3 terms
3.1 Suction pressure
shot Steam extractor performance test procedures
Steam turbine auxiliary equipment model compilation method
Technical conditions for processing and assembly of steam extractors
Technical conditions for steam turbine steel castings
Carbon cable Structural steel
Stainless steel for forgings
Technical conditions for cast copper alloys
Technical conditions for steam turbine cast iron parts
High-quality carbon structural steel hot-rolled thick steel plates and wide steel strips Copper alloy tubes for exchangers
Stainless steel seamless steel tubes
Steam turbine cleanliness standards
Steel fusion welded butt joint radiography and quality grading product labeling
Technical conditions for steam turbine paint| |tt||Technical conditions for steam turbine rust prevention
Technical conditions for steam turbine packaging
General process regulations for steam turbine rust prevention
Typical process of steam turbine painting
The suction port of the air extractor The absolute static pressure is measured according to JB4056. 3.2 Capacity of the air extractor
Under the design working conditions, the mass of air sucked from the suction port of the air extractor per unit time, 3.3 Suction temperature
The pumped gas (or steam, gas mixture ) The temperature at the suction port of the air extractor shall be measured according to JB4056. 3.4 Working steam pressure
The absolute static pressure of the working steam used to suck gas in front of the air extractor nozzle. 1992-08-06rat
1993-01-01
1
3.5 steam consumption
JB/T6470.21992
under design conditions Below, the working steam quality passing through the air extractor nozzle per unit time. Multi-stage air extractor refers to the sum of the working steam quality passing through the nozzles at all levels.
3.6 Outlet pressure
The absolute static pressure of the gas at the outlet of the air extractor discharged into the atmosphere. 3.7 Cooling water volume
Under design conditions, the quality of cooling water passing through the extraction cooler per unit time. 3.8 Cooling water inlet temperature
Cooling water temperature at the inlet of the extraction cooler. 3.9 Cooling water outlet temperature
The cooling water temperature at the outlet of the extraction cooler. 3.10 Air extractor characteristic curve
The relationship curve between the air extraction volume and the suction pressure of the air extractor under different working steam pressures. 4. Structural form and model number
The air extractor has single-stage and multi-stage second-class structures. Its model number should comply with the regulations of ZBK54017. 5 Technical requirements
5.1 The working steam source of the air extractor must be reliable and stable, and its pressure is generally selected between 0.6~1.6MPaa). The working steam temperature of the extractor should be quite superheated. During operation, the working steam pressure and temperature of the air extractor should meet the design requirements to ensure normal operation. 5.2 The suction pressure of the air thrower is generally 0.925 to 0.97 times of the condenser pressure, and is selected based on the air extraction resistance. 5.3 The capacity of the air extractor is selected according to the total exhaust steam volume of the steam turbine, the total number of exhaust ports, and the number of condenser shells (Table 1, 2, 3). The capacity should not be less than the value in the table: the capacity of the air extractor supporting the steam turbine condensation equipment of the nuclear power plant and the air cooling condensation equipment should be appropriately increased according to the value in the table to ensure sufficient suction capacity. . The suction capacity of the starting air extractor is required to be large, and its capacity is selected according to Table 4\. The capacity conversion of the air extractor can be calculated according to Table 5\. Table 1 Air extractor capacity (single shell condenser) effective
steam flow rate
kg/h
to 11340
11341 for each main exhaust port ~22680
22681~45360
45361~113400
113401~226800
226801453600
453601~907200
907201~1360800|| tt||1360801-1814400
2
1
0.085
0.113
0.142
0.212
0.283|| tt||0.354
0.425
0.496
0.566
2
0.113
0.142
0.212||tt| |0.354
0.425
0.566
0.708
0.708
0.850
3
0.142
0.212
0.283
0.354
0.496
0.565
0.708
0.850
0.991
Total exhaust steam Number of mouths
4
Pumping
0.142
0.212
0.283
0.425
0.566
0.708
0.850
0.991
1.133
5
6
mixing
object
amount|| tt||m3/min
0.212
0.283
0.354
0.496
0.708
0.850
0.991|| tt||1.133
1+274
0.212
0.283
0.354
0.566
0.708
0.850|| tt||1.133
1.274
1.416
7
0.212
0.283
0.425
0.566||tt| |0.850
0.991
1.133
1.416
1.558
8
0.283
0.354
0.425
6.708
0.850
1.133
1.274
1.558
1.699
9
0. 283
0. 354
0.425
0.708
0.991
1.133
1.416
1.699
1 .841. ~453600
453601~907200
907201~1360800
1360801~1814400
可以主排汽口结构
燕汽性情||tt| |kg/h
113401226800
226801~453600
453601907200
907201~1360800
1360801~1814400
2||tt| JB/T6470.21992 tt||抽
吸
汽
8
車
口
合
m/min|| tt||数
物
10
量
0.5650.5660.5660.7080.708
0.425
0
0.850
0.991/0.991
.850
0. 5660.566,0.708
0.7080.7080.850
0.850
1
991
1.133
0.991
1.1331.133| |tt||1.1331.416
850
991
133
416
0.850
-133
1.699
991
416
699
133
699
982
133
416|| tt||1.699
-416
599
982
1.9822
2.266
416
12||tt ||133
13
.133
1.133
4161
.699
.6991.
982| |tt||982
266
266
982
266
2+
1699
1,982|| tt||2.549
549
2.832
2.832
1.9821.9822.2662-2662.5492.8322.8323.1151.4161.699
3.398
表3 抽气器包装(三可件凝汽器）总
抽
0.8500.8501.062
0.850
0621.274
11.||tt ||1.062
1.274
2741.487
1.062
1.274
487
4871.6992
2.124
排
汽
吸
1.062
4.87
1.699
2.
124
混
口
合
m/min
+274
487
2.124
124
数
10
物
量
.4871.
487
1.6992.124
124||tt ||2.549
2.124
1.6991.6992.1242.124
2.1242.
124
2.549
2.5492.974||tt| |2
549
2.974
2.549
549
2.974
2.974
3.3983.398||tt| 1.4871.6992.1242.1242.5492汽量
kg/h
至45360
45361~113400
113401~226800
226801453600
453601907200
907201~1360800
1360801~1814400
1814401~2268000
2268001~2721600
2721601~3175200
3175201~3628800
3628801- 4082400. |tt||1,416
2,832
5,664
9,912
19,824
29,736
39,648
49,560||tt ||59.472
69.384
79.296
89.208
99.120
表5
抽吸徆合物量m3/min||tt ||干水水量kg/h
水水洗量kg/h
汽、气水水量
抽吸水水量
干水水量||tt| |水水洗量
kg/h
m3/min
kg/h
kg/h
汽、气气机量||tt| |惽吸机水量
干水量量
水洗方量
kg/h
m3/min
kg/h
kg/h
汽，气深圳量
kg/h
往：1)
2)
JB/T6470.2±1992| |tt||（干电视量、
抽气器包装可算
0.085
6.12
13.47
19.59
0.850| |tt||61.24
134.72
195.96
1.982
142.88
314.34
457.22
0.113||tt ||8.16
17.96
26.12
0.991
71.44
157.17
228.61
2.124
153.09
336.80
489.89
0.142
10.21
22.45
32.66
1.062
76.57| |tt||168.47
245.04
2.266
163.30
359.25
522.55
0.212
15.33
33.75
49.08
1.133
81.65| |tt||179.63
261.28
2.549
183.71
404.16
587.87
水时间、
0.283
20.41
44.91
65.32
1.274
91.85
202.08
293.93
2.832|| tt||204.12
449.06
653.18
汽气汉剧量）
0.354
25.49
56.06
81.55
1.416
102.06
224.53
326.59
2.974
214.33
471.52
685.85|| tt||总排汽量可以洗轮机排汽量与推了汽轮机通过凝汽的时量之和。0.425
30.62
67.36
97.98
1.487
107.19
235.
343.02
3.115
224.53
493.97
718.50
0.496
35.70
78.52
114.22
1+558
112.27
246.99
359.26
3.398
244.94
538.88
783.82
0.566
40.82
89.81
130.63
1.699|| tt||122.47
269.44
391.91
3.823
275.56
606.24
881.80
0.708||tt| |51.03
112.27
163.30
1.841
132.68
291.89
424.57
总排汽口数可以汽轮机的排汽口数与排月口数总和排汽口数总和。 The standard m/min value in the table is the gas pressure is 0.1013MPa(a), the temperature is 21℃, the data in the table is only 3 ）
以主排汽口数。表中standardm3/min值is in the case of gas pressure of 0.1013MPa(a) temperature of 21℃. The air capacity of the machine is 0.736m3, when the volume of steam is 227000kg/h and above, it can extract air from the machine in about 30 minutes, making it one时小降 to 33.86kPa(a) required gas volume. 5.4 Gas volume Q is less than or equal to 1.132m/min，从电影电视技除的非凝结气量与戊气器比值和戊气器小时Q is greater than 1.13m*/min时非凝结质量量9的限值应新表6表以以设计凝汽器凝结水含oxy量P。结果表表。
6
表
抽气器包装
Q
m°/min
Q≤0.566
0.566566
0.566566
0.5661.132
Oxygen content of condensate in condenser
p.
42
14
7
42
14
7
42
14
7
Amount of non-condensable gas extracted
E
%
50
35
25
50
≤25
15
Note: m/min value refers to the non-condensable gas volume under the condition of pressure of 0.1013MPa(a) and temperature of 21C
Q
m3/min
0.566
0.283
o.170
5.5 The water seal of sufficient height in the pipeline from the drain water of the steam cooler of the vacuum pump to the hot and cold water of the condenser should be ensured. Generally, the water seal height is greater than or equal to 2 times the difference between the drain water pressure of the steam cooler of the vacuum pump and the condenser pressure. 4
JB/T6470.21992
5.6 To ensure the normal operation of the vacuum pump, the main condensate recirculation should be enabled under low load of the turbine. 5.7 To shorten the start-up time of the turbine, start the vacuum pump. When starting the vacuum pump, the condenser pressure should generally drop to 0.035MPa, and then the main vacuum pump should be put into use.
5.8 A filter should be added to the working steam pipeline to prevent the nozzle from being blocked. The recommended diameter of the vacuum pump nozzle is not less than 3mm. The vacuum pump should be equipped with meters for working steam pressure and temperature, suction pressure and temperature, and cooling water temperature. 5.9
5.10 The following characteristics of the vacuum pump must meet the design requirements: a.
b.
c.
5.11
5.12
Suction pressure;
Vacuum capacity;
Steam consumption.
When the working steam pressure, outlet pressure, and cooling water inlet temperature change slightly, the vacuum pump can still maintain stable operation. The noise measured 1m away from the outer contour of the vacuum pump shall not exceed 90dB (A sound pressure level). Appropriate materials should be selected according to the working conditions of each part of the vacuum pump and the good process performance of the materials. For the nozzle, wear-resistant 5.13
materials should be selected, and for the diffuser, cavitation-resistant materials should be selected. Table 7 provides the materials that can be selected for each part of the vacuum pump. Table?
Parts Name
Steam Chamber
Nozzle
Suction Chamber
Diffuser
Cooler Shell
Cooler
Cooler
5. 14
Material Name
Cast Steel
Carbon Steel Plate
Stainless Steel
Cast Bronze
Cast Iron
Carbon Steel Plate
Cast Bronze
Cast Iron
Carbon Steel Plate
High Quality Carbon Steel Plate
Cast Iron
Huangji Tube
Tin Brass Tube
Iron White Copper Tube
Stainless Steel Tube
Material Brand
ZG230~450
ZG20CrMo
Q235-A
1Cr13
2Cr13
ZCuA110Fe3
ZCuSn5Pb5Zn5
HT150
HT200
HT250
Q235-A
ZCuA110Fe3
ZCuSn5Pb5Zn5
HT150
HT200
Q235-A
20
HT200
HT250
H68A
HSn70-1
BFe10-1-1
1Cr18Ni9
Each material must comply with the relevant standards and have a quality certificate or pass the inspection before it can be put into production. Corresponding material standards
ZBK54038
GB700
GB4228
GB1176
ZBK54005
GB700
GB1176
ZBK54005
GB700
GB711
ZBK54005
GB8890
GB8890
GB2270
JB/T6470.21992
5.15 The manufacture of vacuum pumps shall comply with the requirements of ZBK54012 and be carried out according to drawings and technical documents. 5.16 The requirements for the cleanliness of castings and welded parts in the vacuum pump shall comply with the provisions of JB4058. 5.17 Under the conditions of use of the vacuum pump, if the product is damaged or cannot work normally due to product design and manufacturing quality problems within the time specified in the contract, the manufacturer shall be responsible for repair or replacement. 6 Test and Inspection
6.1 The first steam jet vacuum pump of various models must pass the performance test, and its performance test shall be carried out in accordance with JB4056. 6.2 The working steam part (steam chamber) and cooling water part (cooling water pipe and water chamber) of the vacuum pump shall be subjected to water pressure test. The water pressure test pressure is 1.5 times the working pressure of the medium, and the water pressure is maintained for 10 minutes without leakage. The steam air part (shell, suction chamber and piping system) shall be subjected to water pressure test, and the pressure is 0.3MPa (a) and maintained for 10 minutes without leakage. 7 Supply scope of steam ejector
The supply scope of steam ejector includes steam filter, steam supply valves of each level of ejector, pressure gauge, vacuum gauge, cooler inlet and outlet leak gauge, etc. in addition to the ejector body.
8 Marking, paint and packaging
8.1 Nameplate
8.1.1 The nameplate shall comply with the provisions of GB/T13306. 8.1.2 The nameplate shall be located in a conspicuous position of the ejector. 8.1.3 The content of the nameplate shall include product name, model, working steam pressure, steam consumption, ejector capacity, suction pressure, factory number, factory date, and manufacturer.
8.2 Paint packaging
8.2.1 The paint of steam ejector shall comply with the provisions of JB2900 and JB/Z163. 8.2.2 The rust prevention of steam ejector shall comply with the provisions of JB2901 and JB/2164. 8.2.3 The packaging of steam ejector shall comply with the provisions of JB2862. 8.2.4 The following random technical documents shall be included with the product when it leaves the factory a. Product certificate:
Instruction manual;
b, i
c. Product general drawing. wwW.bzxz.Net
Additional instructions:
This standard is proposed and managed by the Shanghai Power Generation Equipment Complete Design Institute of the Ministry of Machinery and Electronics Industry. The main drafting units of this standard are: Shanghai Power Generation Equipment Complete Design Institute, Harbin Steam Turbine Household, Beijing Quantity Motor Factory, Shanghai Steam Turbine Factory, Wuhan Steam Turbine Generator Factory, Qingdao Steam Turbine Factory, Nanjing Steam Turbine Motor Factory. 6
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