酸洗报土人E.docx

1、酸洗报土人Ecommissioning procedureProject： Turkey ICDAS 1135MW Unit 1Section：Chemistry Title： Boiler chemical cleaningDocument number：TR-ICDAS-CP-CM-007Revision： 0All rights reserved in this document and the information contained therein. Reproduction, use or disclosure to third party without prior writt

2、en permission is strictly forbidden Heilongjiang Electric Power Research Institute, China. Table of Contents1 Objective 42 Scope of work 43 Acceptance criteria 44 References 55 Prerequisites 56 Precautions 57 Test equipment and materials 68 Procedure 69 Verification and Post Requisites 1010 Attachme

3、nt 111 ObjectiveTo remove precipitate of iron oxide, welding scale, oil, rust, the boiler should be cleaned before the unit integrated startup, as well as to ensure quality of water and steam meet standard demand.2 Scope of workCleaning scope include boiler drum、water wall、economizer、down-comer tube

4、, header. The correlative systems are consisted of chemical solution system, cleaning system and chemical discharge system.Chemical solution system scheme is as follows:Chemical solution tank chemical solution pump chemical solution tankChemical solution tank chemical solution pump deaerator tankCle

5、aning system scheme is as follows:Boiler drum down-comer tube bottom header water wall boiler drum.Boiler drum down-comer tube bottom header forced circulation cleaning pump economizer boiler drum.Chemical discharge system scheme is as follows:Boiler temporary pipe waste water basin waste water trea

6、tment system discharge.Volume of Cleaning system is 110m3.3 Acceptance criteria3.1 The quality of the boiler chemical cleaningCheck itemsCriteriaResult1Corrosion rate 8g/(m2.h)2Surface of cleaned metalSurface of cleaned metal is cleanness, there have no residual oxide and welding scale on the whole,

7、 and have no copper plating3Passivation filmGood passivation film is formed on the surface of cleaned metal and there have no secondary external corrosion and pitting.4 References4.1 Boiler system diagram.4.2 Boiler installation and operation manual.5 Prerequisites5.1 Installation of all the tempora

8、ry pipes and equipments were completed in accordance with cleaning system diagram. Welding of temporary pipes should follow the quality demand of real system pipes. Take hydraulic test of working pressure by cleaning pump, to ensure no leakage. 5.2 Systems, valves and analyzers that not attend clean

9、ing should be isolated.5.3 Pressure gauges of boiler drum should be changed to temporary pressure gauges which measuring range are 0-1.0MPa.5.4 Corrosion coupon and pipe sample should be hung in the boiler drum.5.5 Motor drive discharge valve of super-heater shall operates normally, Motor drive stop

10、 valve of economizer recirculation piping shall operates normally.5.6 Dry-out of boiler finished.5.7 Communication and light in site are all ready， if not, the temporary measure should be prepared, working passage are unblocked, temporary equipments used in installing period should be removed.5.8 An

11、alytical reagent and analyzer are all ready.5.9 Recorder paper used in acid cleaning are all ready.5.10 Top and bottom wall temperature indictors of boiler drum shall operates normally, a temporary temperature measuring device should be installed on the every water wall where heat load is near to ma

12、ximum load so as to monitor if the temperature raising rate of metal surface is uniformly and transfer signal to temperature scanner. 5.11 Cooling water pressure of economizer circulation cleaning pump must be more than 0.3MPa。5.12 Cooling water system of sampling system should operates normally and

13、 trial run of boiler dosing system should be completed.6 Precautions6.1 Personnel who attend cleaning should study safety guide for chemical and electric.6.2 Electric equipment, chemicals, and waste water should be taken charge by special person.6.3 Prepared first-aid chemicals for burn by acid and

14、caustic in site.6.4 Provided some fire fighting equipments.6.5 Electric switches and electric equipment should have evidence sign.6.6 Personnel who attend commissioning should be familiar with system, prevent from improper operation.6.7 Wearing safety helmet when come into site.7 Test equipment and

15、materialsPrepared analyzers and chemicals as follows:pH meter, burette stand, temperature meter, electric oven and some analytical reagents.8 Commissioning procedure8.1 Inspection of single equipment8.1.1 Inspection of valveDescriptioncheck itemsresult1Motor drive discharge valve of super-heaterDisp

16、lay on CRT accord with actual status, operate normal2Motor drive stop valve of economizer recirculation pipingDisplay on CRT accord with actual status, operate normal8.1.2 Inspection of cleaning pumpsDescriptioncheck itemsresult1#1 cleaning pumpNormal startup and stop2#2 cleaning pumpNormal startup

17、and stop3Cleaning pump of economizerNormal startup and stop8.1.3 Inspection of I&C equipmentDescriptioncheck itemsresult1Water level meter of boilermeter indicate correctly2Water level meter of deaerator tankmeter indicate correctly3Pressure gauge of #1 cleaning pump outletmeter indicate correctly4P

18、ressure gauge of #2 cleaning pump outletmeter indicate correctly5Pressure gauge of economizer circulating cleaning pump outletmeter indicate correctly6Pressure gauge of makeup water pump outlet of boiler meter indicate correctly7Pressure gauge of steam that heating condensate water tankmeter indicat

19、e correctly8Pressure gauge of cooling water of economizer cleaning pumpmeter indicate correctly9Low range local pressure gauge of boiler drummeter indicate correctly10Top wall temperature indictors of boiler drummeter indicate correctly11Bottom wall temperature indictors of boiler drummeter indicate

20、 correctly12Temperature measuring device on the every water wallmeter indicate correctly8.1.4 Inspection lists of boiler chemical cleaning system prior to cleaningCheck itemsResult1Installation of boiler cleaning system is completed according to design diagram2Working pressure test of system is qual

21、ified.3Pressure gauges of boiler drum should be changed to temporary pressure gauges which measuring range are 0-1.0MPa.4Installation of temporary temperature measuring device should be completed and operate normal.5Cooling water pressure of economizer circulation cleaning pump must be more than 0.3

22、MPa。6Corrosion coupon and pipe sample should be hung in the boiler drum.7Systems, valves that not attending cleaning should be isolated, lists are as follow.7.1 Motor drive gate valve of main feed-water piping7.2 Motor drive stop valve of main feed-water bypass7.3 Motor drive adjust valve of main fe

23、ed-water bypass7.4 Motor drive stop valve of main feed-water bypass7.5 Stop valve of feed-water operation desk drain(quantity:2)7.6 Stop valve of before feed-water operation desk manometer & vent(quantity:2)7.7 Stop valve of economizer inlet header drain(quantity:2)7.8 Stop valve of economizer inlet

24、 header acid cleaning(quantity:2)7.9 Stop valve of economizer outlet header nitrogen filling(quantity:2)7.10 Stop valve of pipe between economizer outlet & drum vent(quantity:2)7.11 Stop valve of left side drum bi-colour nilometer (quantity:3)7.12 Stop valve of left side drum electric nilometer(quan

25、tity:3)7.13 Stop valve of right side drum electric nilometer(quantity:3)7.14 Stop valve of equalizer for water level adjustment signal(quantity:2)7.15 Stop valve of equalizer for water level alarm signal(quantity:2)7.16 Stop valve of equalizer for water level protection signal(quantity:2)7.17 Stop v

26、alve of equalizer for water level indication signal(quantity:2)7.18 Stop valve of left side drum pressure signal (quantity:2)7.19 Stop valve of right side drum pressure signal (quantity:2)7.20 Stop valve of drum acid cleaning piping(quantity:2)7.21 Stop valve of drum chemical feed piping(quantity:2)

27、7.22 Stop valve of drum emergency discharge(quantity:2)7.23 Stop valve of drum emergency discharge(quantity:2)7.24 Stop valve of drum continuous blow down7.25 Motor drive control valve of drum continuous blow down7.26 Motor drive stop valve of drum continuous blow down7.27 Stop valve of down-comer d

28、rain piping(quantity:4)7.28 Stop valve of neighbor boiler heating distribute header inlet7.29 Motor driver stop valve of neighbor boiler heating distribute header inlet7.30 Stop valve of neighbor boiler heating distribute header outlet(quantity:12)7.31 Stop valve of neighbor boiler heating distribut

29、e header drain(quantity:2)7.32 Stop valve of pipe between drum & side HRA vent(quantity:4)7.33 Stop valve of pipe between drum & side HRA vent(quantity:4)7.34 Stop valve of saturated steam sampling(quantity:4)7.35 Throttle of saturated steam sampling(quantity:4)7.36 Stop valve of rear HRA lower head

30、er drain(quantity:8)7.37 Stop valve of middle HRA upper header vent(quantity:2)7.38 Stop valve of primary super-heater inlet & outlet header drain(quantity:4)7.39 Stop valve of primary super-heater outlet header & platen superheater inlet header vent(quantity:4)7.40 Stop valve of platen super-heater middle header drain(quantity:2)7.41 Stop valve of platen super-heater outlet header vent(quantity:2)7.42 Stop valve of FSH inlet header drain(quantity:2)7.43 Stop valve of FSH outlet header vent(quantity:2)7.44 Stop valve of FSH outlet header pressure gauge(quantity:4)7.4