FLOWSERVE干气密封PDF

Supply Flow
Filter
Vent
FBiblioteka Baidulter
Vent
12
S
Filter Filter
3
Vent
8.3
Vent 8.2 Pressure Transmitter
Differential Pressure Transmitter
13
10
15 16 14
Pressure Switch
1
8.1
9.1
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Boosted Supply Gas to Dry Seals增压后气体进入干气密封
Example Of How The Ampliflow™ Works 如何工作 范例
Seal Supply Flow for Diameter 3/32" Orifice Based On Last TCPL Panel Design
Control Panels – Functionality
控制系统－－作用
• Supply of conditioned gas to seals 将处理好的气体提供给密封 • Monitoring of flow rate and pressure of seal gas 监控密封气的流量及压力 • Monitoring of seal performance through: 通过以下状况监控密封情况
Flow Solutions Division Compressor Seal Group
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AMPLIFLOW™ Process Flow Diagram
AMPLIFLOW工艺流程图
Vent排气口
Drive Air Out驱动气出口
– Measuring of leakage flow (local) 现场测量密封泄漏率 – Measuring of leakage gas pressure (remote) 远程测量密封泄漏气压力
• Supply of clean filtered air or N2 to barrier seal 为隔离密封提供清洁过滤的空气或氮气
Flow Solutions Division Compressor Seal Group
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Vent
11 4 8.4 First Stage Leakage 5 2 6
Basic Panel and Seal Gas Flow 基本控制板及密封气流程
Leakage 泄漏
PROCESS工艺侧
ATMOSPHERE 大气侧
Flow Solutions Division Compressor Seal Group
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BARRIER SEALS CENTER TAP LABYRINTH 迷宫式隔离密封
Flow Solutions Division
AMPLIFLOW Presentation
TM
Ampliflow Systems Patent Pending by Flowserve
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TM
Dry Gas Seal Basics
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Ampliflow™ System Incorporated in Gas Seal Panel 与干气密封控制系统结合一体的Ampliflow系统
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• Increases gas pressure any time there is insufficient differential across the Compressor to ensure filtered gas to the seals.在任何时候只要压差不足，即可将过滤后 的密封气增压并送至密封面 • This helps prevent contamination of the seals during start-up or times of recycle. 可防止在启动及循环过程中密封的污染 • Resulting in longer seal life and less chance of failure due to contamination. 可保证密封寿命长以及降低由于污染造成的密封失效 • All for less than the cost of a seal. 所有的费用少于一个新密封的费用
115.00 Start启动 Based on : Psuction=700psig Pdischarge=880psig Pseal=Psuction
95.00 Flowrate (SCFM per Seal)
Pressurization
75.00 Idle 55.00 Unit Ramp-up
Normal Operation 正常工作
Ampliflow™ P&ID
Flow Solutions Division Compressor Seal Group
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The Value of Ampliflow™ Ampliflow的意义
Secondary Leakage and Barrier 次级泄漏及隔离气 Barrier Seal Gas 隔离密封气
Flow Solutions Division Compressor Seal Group
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40
45
50
Flow Solutions Division Compressor Seal Group
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Stand Alone Ampliflow™ System 独立的Ampliflow 系统
Flow Solutions Division Compressor Seal Group
Relief
Vent
Vent
Laby Seal
7
Laby Seal Windback
8
9
1 10
Seal Supply Gas
Barrier Supply Gas
8.4 9.1
First Stage Leakage
Second Stage Leakage
Flow Solutions Division Compressor Seal Group
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AMPLIFLOW™
Provides pressure boost to seal supply gas to ensure filtered gas to the seals during start-up or times of low pressure differential. 可为密封气进行增压，以保证在启动及低压差时有足够流 量的过滤过的气体提供到密封端面 •Manual Operation手动控制
干气密封基础原理
Flow Solutions Division Compressor Seal Group
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TANDEM SEAL 串联密封 = GASPAC T
Clean Buffer Gas 清洁密封气 Leakage 泄漏
35.00
15.00
AREA OF NO SEAL SUPPLY
-5.00 0 5 10 15 20 25 Time (minutes) 30 35
Dry Seal Supply Flow With AMPLIFLOW (Conservative Estimate) 配AMLIFLOW的密封气工作曲线 Dry Seal Supply Flow Without AMPLIFLOW 无AMPLIFLOW的密封气流曲线
DRY SEAL PANEL 干气密封 控制板 AMPLIFLOW SYSTEM系统 Drive Air In驱动气入口
Filtered Gas In 过滤气体入口 Compressor Discharge Gas压缩机出口气
Boost Gas Out增压气体出口
Flow Solutions Division Compressor Seal Group
Flow Solutions Division Compressor Seal Group
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– Set by discharge pressure 通过出口压力设定
•Automatic Operation 自动操作
– Begins operation at low differential pressure 在低压差时开始工作 – Continues operation until sufficient pressure differential re-established 继续工作直至足够的压差建立
Flow Solutions Division Compressor Seal Group
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Application Philosophy应用原则
• System adds to reliability of unit by helping to prevent seal contamination. 此系统增大了装置的可靠性，防止密封气污染。 • Pump is designed to support a “50,000hr dry gas seal life”. 增压泵的设计可支持 “50,000小时干气密封寿命 ” • Controls shut in AMPLIFLOW™ if any problem occurs and does not effect compressor operation or normal flow to the seals. 如果AMPLIFLOW有问题发生，可关闭此系统而不 影响压缩机正常运转及密封气控制部分。
Portable Ampliflow™ For New Unit Start-up or Commissioning 可手提式的Ampliflow 用于启动或试运转
Flow Solutions Division Compressor Seal Group
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• Seals require steady supply of clean gas 密封需要清洁稳定的气源 • Supply at higher pressure than process 气源压力高于工艺侧 • Leakage is an indication of seal health 泄漏率是密封健康状况的指示 • Barrier gas prevents oil from entering seal and gas from entering bearing cavity隔离密封可防止油进入密 封以及密封气进入轴承箱 • The number one cause of dry gas seal failures is a result of contamination getting into the seals. 干气密封失效的主要原因是污染物进入密封端面。