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1、In the operation of high pressure heater problems and countermeasuresabstabstractract: coal-fired power plants in high-pressure heater due to work under high temperature and high pressure, so easily damaged, damage could not invest in operation with high water temperature will drop, power, this pape
2、r points out the existing high pressure heater leakage pipes and bilge mouth water distribution automatic bypass seal not beautiful, scanty water system automatically into bad and so on some common problems, analyses the causes of these problems, and puts forward corresponding countermeasures. Keywo
3、rdsKeywords: high pressure heater; Leak; TouRuLv; countermeasures1 1. . prefaceprefaceSteam turbine thermal heating system is adopted to improve the unit operation of the important means of economic. Back to heat heating system operation reliability and performance directly affected the height, comp
4、lete unit operation of economy TouRuLv is economic indicators heater in important evaluation indexes. As coal- fired power plants to the large capacity, high parameter unit development, high pressure heater add) (hereinafter referred to as high as water supply under pressure and temperature rise acc
5、ordingly; There will be in operation by the unit loads of mutation, pump failure, bypass switching caused the sudden pressure and temperature, these would give high add damage. Therefore, in addition to the high add design, manufacture and installation must ensure that quality outside, still in oper
6、ation and maintenance etc, and take the necessary measures to ensure the long-term safety of operation of high added.2 2. . thethe existiexistingng problemsproblemsIn order to ensure the safety of coal-fired power plants ManFa, each high economic add all should is in operation. If because of the fai
7、lure, should according to GaoJiaShi must be discontinued with specified high manufacturing Numbers and discontinuation of relationships, or according to the load to determine the steam extraction pressure steam turbine unit of allowable maximum output. Plant high add in actual operation of the main
8、problems existing in the below.2.12.1 waterwater susupplypply autoauto bypassbypass devicedevice sealingsealing designdesign notnot beautifulbeautifulImport represent valves casing bypass sleeve clearance place leakage. Found in operation, # 1-5 high temperature with its exports than the original ex
9、port temperature low around 6. After the overhaul into water temperature obviously increase, shortly after, but running back to the original relatively low value. Overhaul its seal, found by plugging material was washed run, and certainly some pits scouring by water into inner seriously. So accordin
10、g to the original design of the seal clearance will lose its practical significance, and now will manufacturers in the overhaul of the original 0.70 0.8 mm to 0.35 mm, and gap with high-pressure airproof material change, the effect is good. High add entrances water room clapboard leakage. A power pl
11、ant in operation of water supply temperature unit 212.2 obviously low ( for 240 ) design value. Found in VSD repair gateway water board is very big, and impact, gap between inner cavity with clapboard leave, make water to short-circuit, after the flood water temperature, obviously rises, can reach 2
12、30 .2.22.2 scantyscanty waterwater systemsystem automaticallyautomatically putting-in-serviceputting-in-service proactivelyproactively adverseadverseWe plant of the 8th high add, hydrophobic automatic cant pitch without water, frequent operation. Scanty conduit scour serious, vibration is very big,
13、the carbon steel elbow frequently blunt bad. After the high water regulator with hydrophobic moved to the deaerators platform, which helps to overcome scanty conduit elbow erosion serious, the problems of pipeline vibration.2.32.3 waterwater metermeter andand waterwater levellevel signalsignal devic
14、esdevices cannotcannot normalnormal operationoperationWater meter each power plant is the common leakage problem of old factory, our original high water position idea often appear leak phenomenon, some power station 1 machine has been added into high since a leak, electricity substation contacts sho
15、rtly after bad, see not, reflecting water meter with reality.2.42.4 aboutabout hihighgh addadd scantyscanty waterwater systemsystemDeal with high add drain system - the three common fault blocking, vibration and wear is to ensure safe operation, high added an important TouRuLv high plus improve fact
16、ors. Investigate third big failing, are the root of due to high add hydrophobic will produce two-phase fluid flow. According to concerning material is introduced from single-phase flow, when fluid for two-phase flow, the flow velocity will expand 20 times above, resistance increase exponentially. We should pay attention to the following problems in operation.(1) maintain high added to the
