CN102564216A - Method for washing condenser of thermal power plant without intermission - Google Patents
Method for washing condenser of thermal power plant without intermission Download PDFInfo
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- CN102564216A CN102564216A CN2012100407381A CN201210040738A CN102564216A CN 102564216 A CN102564216 A CN 102564216A CN 2012100407381 A CN2012100407381 A CN 2012100407381A CN 201210040738 A CN201210040738 A CN 201210040738A CN 102564216 A CN102564216 A CN 102564216A
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- condenser
- cooling water
- pump suction
- water
- circulating pump
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000005406 washing Methods 0.000 title abstract 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 61
- 239000000498 cooling water Substances 0.000 claims abstract description 33
- 238000005260 corrosion Methods 0.000 claims abstract description 9
- 229920000058 polyacrylate Polymers 0.000 claims abstract description 9
- YDONNITUKPKTIG-UHFFFAOYSA-N [Nitrilotris(methylene)]trisphosphonic acid Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CP(O)(O)=O YDONNITUKPKTIG-UHFFFAOYSA-N 0.000 claims abstract description 6
- 230000007797 corrosion Effects 0.000 claims abstract description 6
- 150000007522 mineralic acids Chemical class 0.000 claims abstract description 5
- 238000004140 cleaning Methods 0.000 claims description 27
- 230000003134 recirculating effect Effects 0.000 claims description 24
- 239000007864 aqueous solution Substances 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 10
- 230000008676 import Effects 0.000 claims description 9
- 239000000853 adhesive Substances 0.000 claims description 8
- 230000001070 adhesive effect Effects 0.000 claims description 8
- 239000010865 sewage Substances 0.000 claims description 8
- 150000003242 quaternary ammonium salts Chemical class 0.000 claims description 7
- 239000000243 solution Substances 0.000 claims description 5
- 238000010248 power generation Methods 0.000 abstract description 3
- 239000003112 inhibitor Substances 0.000 abstract 1
- 101150054854 POU1F1 gene Proteins 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 8
- 238000011084 recovery Methods 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- JLHMJWHSBYZWJJ-UHFFFAOYSA-N 1,2-thiazole 1-oxide Chemical compound O=S1C=CC=N1 JLHMJWHSBYZWJJ-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- JBIROUFYLSSYDX-UHFFFAOYSA-M benzododecinium chloride Chemical compound [Cl-].CCCCCCCCCCCC[N+](C)(C)CC1=CC=CC=C1 JBIROUFYLSSYDX-UHFFFAOYSA-M 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- -1 octadecyl dimethyl benzyl Chemical group 0.000 description 2
- 101150096185 PAAS gene Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- OCBHHZMJRVXXQK-UHFFFAOYSA-M benzyl-dimethyl-tetradecylazanium;chloride Chemical compound [Cl-].CCCCCCCCCCCCCC[N+](C)(C)CC1=CC=CC=C1 OCBHHZMJRVXXQK-UHFFFAOYSA-M 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
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- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention relates to a method for washing a condenser of a thermal power plant without intermission. The method comprises the following steps: (1) adding a slime remover into a circulating water pump suction pool, wherein the concentration of the slime remover is kept at 50-200ppm; a water solution flows through a circulating water pump, a condenser and a cooling water tower from the circulating water pump suction pool to return to the circulating water pump suction pool for circularly washing until a cooling water tower column restores an original color; (2) controlling the flow velocity of circulating cooling water to be 0.6-2.2m/s based on 50-1000g/m<3> of the amount of scale buildup of a circulating cooling water system, adding 50-200ppm amino trimethylene phosphonic acid, 20-100ppm polyacrylate and 5-20ppm corrosion inhibitor to the circulating water pump suction pool, and controlling pH value of the solution of an inlet of the condenser to be between 5 and 6 by adding inorganic acid; (3) and detecting the temperature of two ends of the condenser and completing washing when the temperature difference of two ends of the condenser is less than or equal to 4 DEG C. With the adoption of the washing method of the invention, normal power generation of a set is not affected, and the cost can be effectively saved.
Description
Technical field
The invention belongs to condenser cleaning technique field, be specifically related to a kind of thermal power plant condenser cleaning method of not stopping transport.
Background technology
The condensing equipment of thermal power generation unit is important heat-exchange apparatus, and effect is a kind of heat exchanger that the steam turbine exhaust is condensed into water, and forms and keep needed vacuum.Condensing equipment comprises condenser, air ejector, condensate pump and water circulating pump, and wherein condenser is topmost part.Condenser is the low-temperature receiver in the whole thermodynamic cycle, and main effect is in turbine discharge interruption-forming high vacuum, makes steam in steam turbine, expand into minimum pressure, increases the usable enthalpy drop of steam in steam turbine, improves thermal efficiency of cycle; The steam discharge of steam turbine is condensed into water, send the boiler circulation again back to; Compile various hydrophobicly, reduce loss of steam and water.In recent years, along with thermal power plant uses the deterioration of raw water quality and the raising of concentration rate of circulating cooling water, though taked the antiscale measure, the condenser copper tube scale formation frequently takes place.The main harm of condenser fouling is to reduce the efficient of unit.After the condenser copper tube fouling, condenser vacuum reduces, and unit efficiency reduces, and coal consumption raises, and the copper pipe Dezincification corrosion can cause when serious leaking, and causes boiler corrosion, fouling, even booster.
Usually need after the condenser tube fouling to shut down to clean, promptly utilize large and small repairing the time, other sets up acid cleaning tank, acid picking pump, and copper pipe is carried out Chemical cleaning; Mostly cleaning fluid is that inorganic acid adds corrosion inhibiter and forms.Chemical cleaning under this stopped status, required temporary system equipment bulky complex consumes great amount of manpower and material resources and financial resources.In addition, because the economic loss that the few generating of shutdown cleaning causes is also bigger.If run into peak of power consumption, unit can not be stopped transport, and fouling can not in time be removed, and brings great harm can for the safe operation of unit.
Summary of the invention
The object of the invention is to provide a kind of thermal power plant condenser cleaning method of not stopping transport, and this cleaning method does not influence the unit normal power generation, saves cost.
For realizing above-mentioned purpose, the present invention adopts following technical scheme:
A kind of thermal power plant condenser cleaning method of not stopping transport may further comprise the steps:
1. be 2000～80000m with the recirculating cooling water system volume
3Be example; In the water circulating pump suction pit, adding adhesive mud remover keeps concentration at 50～200ppm; The aqueous solution self-loopa water pump suction pit that contains adhesive mud remover is flowed through behind water circulating pump, condenser and the cooling tower; Get back in the water circulating pump suction pit, recirculating cooling water system is carried out wash cycles until this recovery of cooling tower base for post true qualities (aqueous solution rate of circulating flow is advisable with 0.6～2.2 m/s); Recirculating cooling water system stops blowdown during adding adhesive mud remover, and it is residual not have foundry loam basically in recovery blowdown to the water after accomplishing to the foundry loam stripping bench, and replenishes equivalent recirculated water simultaneously;
2. with recirculating cooling water system dirt amount 50～1000g/m
3Meter; Control recirculated cooling water flow velocity is at 0.6～2.2 m/s; In the water circulating pump suction pit, add 50～200ppm ATMP, 20～100ppm polyacrylate and 5～20ppm corrosion inhibiter, and the pH value of solution through adding inorganic acid control condenser import department is between 5～6, not blowdown of recirculating cooling water system during the cleaning; When turbidity increased to 10～100 NTU, 200～5000 tons of sewage effluents also replenished equivalent recirculated water simultaneously;
3. detect condenser two ends temperature, when condenser terminal difference temperature≤4 ℃, clean and accomplish.In addition, the indexs such as variation that can also pass through
, hardness and the total iron content of the monitoring condenser import and export aqueous solution further judge cleaning performance.
Concrete, step 1. described in adhesive mud remover be quaternary ammonium salt or OIT etc.The inorganic acid of step described in 2. can be red fuming nitric acid (RFNA) (mass fraction about 65%) or concentrated hydrochloric acid (mass fraction about 37%) etc.
Polyacrylate commonly used has TH-1100 polyacrylate (Shandong Taihe Water Treatment Co., Ltd.'s production), XG-309 polyacrylate (production of Changzhou starlight landscape engineering Co., Ltd), Sodium Polyacrylate (PAAS, Xiantao Xinda Chemical Industry Co., Ltd. produces) etc.Quaternary ammonium salt commonly used has octadecyl dimethyl benzyl oronain (1827), tetradecyl benzyl dimethyl ammonium chloride (1427), dodecyl benzyl dimethyl ammonium chloride (1227) etc.
Compare the beneficial effect of cleaning method of the present invention with prior art:
The inventive method adopts and does not shut down cleaning, and have following three distinguishing features: 1) clean range is big, can clean the whole circulation cooling water system, comprises shutting down cleaning inaccessiable circulating water cooling tower, circulating water pipeline etc.2) need not add huge temporary system, reduce installation workload, reduce the cleaning cost.3) do not influence unit and normally move, with the great amount of time of shut down having cleaned savings in comparison, production efficiency is high.4) cleaning agent is efficient, nontoxic, character is gentle.
Description of drawings
Fig. 1 is the do not stop transport process chart of cleaning method of thermal power plant according to the invention condenser.
The specific embodiment
Below in conjunction with preferred embodiment the inventive method is explained further details, but protection domain of the present invention is not limited thereto.
As shown in Figure 1, a kind of thermal power plant condenser cleaning method of not stopping transport may further comprise the steps:
1. recirculating cooling water system volume 2000m
3In water circulating pump suction pit 1, add quaternary ammonium salt (quaternary ammonium salt is an octadecyl dimethyl benzyl oronain, and the Changjiang river, Shandong chemical industry Co., Ltd produces) and keep concentration, the about 1.0m/s of recirculated water flow velocity at 50ppm; The aqueous solution self-loopa water pump suction pit 1 that contains quaternary ammonium salt is flowed through behind water circulating pump 2, condenser 4 and the cooling tower 6; Get back in the water circulating pump suction pit 1, recirculating cooling water system is carried out wash cycles, this recovery of cooling tower base for post true qualities behind about 36h; Recirculating cooling water system stops blowdown during adding quaternary ammonium salt, after the foundry loam stripping bench is accomplished, recovers blowdown, about 600 tons of sewage effluent, and it is residual not have foundry loam in the water basically, and replenishes equivalent recirculated water simultaneously;
2. with recirculating cooling water system dirt amount 50g/m
3Meter; Control recirculated water flow velocity is at 1.0m/s; In the water circulating pump suction pit, add 50ppm ATMP, 30ppm TH-1100 polyacrylate and 5ppm HQ-102 composite slow-corrosion scale resistor (available from Langfang China clear water treatment agent Co., Ltd); And reduce add red fuming nitric acid (RFNA) (about 30 tons) control condenser import 3 places for 6 times pH value of solution about 5; Not blowdown of recirculating cooling water system during the cleaning, when turbidity rises to 20 NTU, sewage effluent about 200 tons and additional simultaneously equivalent recirculated water;
3. detect condenser two ends temperature, when the condenser terminal difference temperature is 2 ℃, cleans and accomplish.Monitor
=0.3 of condenser import 3, outlet 5 aqueous solution this moment; Firmness change is about 0.4 ppm, and the total iron content change in concentration is about 0.5 ppm.
As shown in Figure 1, a kind of thermal power plant condenser cleaning method of not stopping transport may further comprise the steps:
1. recirculating cooling water system volume 28000m
3In water circulating pump suction pit 1, adding OIT keeps concentration at 100ppm; The about 1.2m/s of recirculated water flow velocity, the aqueous solution self-loopa water pump suction pit 1 of isothiazolone-containing flow through behind water circulating pump 2, condenser 4 and the cooling tower 6, get back in the water circulating pump suction pit 1; Recirculating cooling water system is carried out wash cycles, this recovery of cooling tower base for post true qualities behind about 60h; Recirculating cooling water system stops blowdown during adding OIT, after the foundry loam stripping bench is accomplished, recovers blowdown, about 10,000 tons of sewage effluent, and it is residual not have foundry loam in the water basically, and replenishes equivalent recirculated water simultaneously;
2. with recirculating cooling water system dirt amount 80g/m
3Meter; Control recirculated water flow velocity is at 1.2m/s; In the water circulating pump suction pit, add 100ppm ATMP, 50ppm TH-1100 polyacrylate and 15ppm HQ-102 composite slow-corrosion scale resistor, and reduce add red fuming nitric acid (RFNA) (about 190 tons) control condenser import department for 14 times pH value of solution about 5.5, not blowdown of recirculating cooling water system during the cleaning; When turbidity rises to 40 NTU, sewage effluent about 2000 tons and additional simultaneously equivalent recirculated water;
3. detect condenser two ends temperature, when condenser terminal difference is 3 ℃, cleans and accomplish.Monitor
=0.2 of the condenser import and export aqueous solution this moment; Firmness change is about 0.3 ppm, and the total iron content change in concentration is about 0.4 ppm.
Embodiment 3
As shown in Figure 1, a kind of thermal power plant condenser cleaning method of not stopping transport may further comprise the steps:
1. recirculating cooling water system volume 75000m
3In water circulating pump suction pit 1, adding OIT keeps concentration at 180ppm; Control recirculated water flow velocity is at 2.0m/s, and the aqueous solution self-loopa water pump suction pit 1 of isothiazolone-containing is flowed through behind water circulating pump 2, condenser 4 and the cooling tower 6, gets back in the water circulating pump suction pit 1; Recirculating cooling water system is carried out wash cycles, this recovery of cooling tower base for post true qualities behind about 72h; Recirculating cooling water system stops blowdown during adding OIT, after the foundry loam stripping bench is accomplished, recovers blowdown, about 1.8 ten thousand tons of sewage effluent, and it is residual not have foundry loam in the water basically, and replenishes equivalent recirculated water simultaneously;
2. with recirculating cooling water system dirt amount 900g/m
3Meter; Control recirculated water flow velocity is at 2.0m/s; In the water circulating pump suction pit, add 200ppm ATMP, 80ppm TH-1100 polyacrylate and 20ppm HQ-102 composite slow-corrosion scale resistor, and reduce add red fuming nitric acid (RFNA) (about 700 tons) control condenser import department for 20 times pH value of solution about 6, not blowdown of recirculating cooling water system during the cleaning; When turbidity rises to 60 NTU, sewage effluent about 4000 tons and additional simultaneously equivalent recirculated water;
3. detect condenser two ends temperature, when condenser terminal difference is 4 ℃, cleans and accomplish.Monitor
=0.2 of the condenser import and export aqueous solution this moment; Firmness change is about 0.4 ppm, and the total iron content change in concentration is about 0.4 ppm.
Claims (2)
1. thermal power plant's condenser cleaning method of not stopping transport is characterized in that, may further comprise the steps:
1. in the water circulating pump suction pit, adding adhesive mud remover keeps concentration at 50～200ppm; The aqueous solution self-loopa water pump suction pit that contains adhesive mud remover is flowed through behind water circulating pump, condenser and the cooling tower; Get back in the water circulating pump suction pit, recirculating cooling water system is carried out wash cycles recover true qualities until the cooling water king-post; Recirculating cooling water system stops blowdown during adding adhesive mud remover, and accomplishing the back to the foundry loam stripping bench, to recover in blowdown to the water no foundry loam residual, and additional simultaneously equivalent recirculated water;
2. with recirculating cooling water system dirt amount 50～1000g/m
3Meter; Control recirculated cooling water flow velocity is at 0.6～2.2 m/s; In the water circulating pump suction pit, add 50～200ppm ATMP, 20～100ppm polyacrylate and 5～20ppm corrosion inhibiter, and the pH value of solution through adding inorganic acid control condenser import department is between 5～6, not blowdown of recirculating cooling water system during the cleaning; When turbidity increased to 10～100 NTU, 200～5000 tons of sewage effluents also replenished equivalent recirculated water simultaneously;
3. detect condenser two ends temperature, when condenser terminal difference temperature≤4 ℃, clean and accomplish.
2. thermal power plant's condenser cleaning method of not stopping transport according to claim 1 is characterized in that, step 1. described in adhesive mud remover be quaternary ammonium salt or OIT.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210040738 CN102564216B (en) | 2012-02-22 | 2012-02-22 | Method for washing condenser of thermal power plant without intermission |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201210040738 CN102564216B (en) | 2012-02-22 | 2012-02-22 | Method for washing condenser of thermal power plant without intermission |
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| CN102564216B CN102564216B (en) | 2013-03-27 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103954169A (en) * | 2014-04-29 | 2014-07-30 | 国家电网公司 | Method for washing air cooling island of first-startup unit in power plant |
| CN105737667A (en) * | 2016-05-03 | 2016-07-06 | 南京化学工业园热电有限公司 | Flushing system and flushing method for low-low-temperature economizer |
| CN110411272A (en) * | 2019-08-29 | 2019-11-05 | 高晋柏 | There are the Thermal Power Station's cooling stack and cleaning method of lasting cleaning function |
| CN112033211A (en) * | 2020-09-04 | 2020-12-04 | 凌源钢铁股份有限公司 | Condenser online cleaning method |
| CN113588546A (en) * | 2021-06-29 | 2021-11-02 | 嘉兴沃特泰科环保科技股份有限公司 | Experimental device for detect slime stripping agent volume that circulating water was used |
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| CN101608882A (en) * | 2009-07-22 | 2009-12-23 | 瓮福（集团）有限责任公司 | The method that a kind of condenser copper tube cleans |
| JP2011052920A (en) * | 2009-09-03 | 2011-03-17 | Toshiba Corp | System and method of rinsing condenser |
| CN201828189U (en) * | 2010-03-30 | 2011-05-11 | 张文军 | Air cooling condenser cleaning system |
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2012
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Patent Citations (5)
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| JP2005270902A (en) * | 2004-03-26 | 2005-10-06 | Sasakura Engineering Co Ltd | Aqueous waste liquid treatment apparatus and washing method therefor |
| CN201285250Y (en) * | 2008-08-19 | 2009-08-05 | 华北电力科学研究院有限责任公司 | Thermal state cleaning apparatus of direct air cooling system |
| CN101608882A (en) * | 2009-07-22 | 2009-12-23 | 瓮福（集团）有限责任公司 | The method that a kind of condenser copper tube cleans |
| JP2011052920A (en) * | 2009-09-03 | 2011-03-17 | Toshiba Corp | System and method of rinsing condenser |
| CN201828189U (en) * | 2010-03-30 | 2011-05-11 | 张文军 | Air cooling condenser cleaning system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103954169A (en) * | 2014-04-29 | 2014-07-30 | 国家电网公司 | Method for washing air cooling island of first-startup unit in power plant |
| CN105737667A (en) * | 2016-05-03 | 2016-07-06 | 南京化学工业园热电有限公司 | Flushing system and flushing method for low-low-temperature economizer |
| CN105737667B (en) * | 2016-05-03 | 2017-07-18 | 南京化学工业园热电有限公司 | Low low-level (stack-gas) economizer rinse-system and purging method |
| CN110411272A (en) * | 2019-08-29 | 2019-11-05 | 高晋柏 | There are the Thermal Power Station's cooling stack and cleaning method of lasting cleaning function |
| CN112033211A (en) * | 2020-09-04 | 2020-12-04 | 凌源钢铁股份有限公司 | Condenser online cleaning method |
| CN113588546A (en) * | 2021-06-29 | 2021-11-02 | 嘉兴沃特泰科环保科技股份有限公司 | Experimental device for detect slime stripping agent volume that circulating water was used |
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Address after: 450052 Songshan South Road, Henan, No. 85, No. Patentee after: STATE GRID HENAN ELECTRIC POWER CORPORATION ELECTRIC POWER SCIENCE Research Institute Patentee after: State Grid Corporation of China Address before: 450052 Songshan South Road, Henan, No. 85, No. Patentee before: Henan Electric Power Corporation Electric Power Science Research Institute Patentee before: State Grid Corporation of China |
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Address after: 450052 No. 85 South Songshan Road, Henan, Zhengzhou Co-patentee after: State Grid Corporation of China Patentee after: STATE GRID HENAN ELECTRIC POWER CORPORATION ELECTRIC POWER SCIENCE Research Institute Co-patentee after: Henan jiuyu enpai Power Technology Co.,Ltd. Address before: 450052 No. 85 South Songshan Road, Henan, Zhengzhou Co-patentee before: State Grid Corporation of China Patentee before: STATE GRID HENAN ELECTRIC POWER CORPORATION ELECTRIC POWER SCIENCE Research Institute Co-patentee before: HENAN ENPAI HIGH-TECH GROUP Co.,Ltd. |