CN107385446B - Heat supply network special-purpose non-toxic anti-corrosion method of steam power plant - Google Patents
Heat supply network special-purpose non-toxic anti-corrosion method of steam power plant Download PDFInfo
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- CN107385446B CN107385446B CN201710599334.9A CN201710599334A CN107385446B CN 107385446 B CN107385446 B CN 107385446B CN 201710599334 A CN201710599334 A CN 201710599334A CN 107385446 B CN107385446 B CN 107385446B
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- 238000005260 corrosion Methods 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 16
- 231100000252 nontoxic Toxicity 0.000 title claims abstract description 7
- 230000003000 nontoxic effect Effects 0.000 title claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 62
- 230000007797 corrosion Effects 0.000 claims abstract description 31
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000010438 heat treatment Methods 0.000 claims abstract description 18
- 238000004506 ultrasonic cleaning Methods 0.000 claims abstract description 14
- 239000006004 Quartz sand Substances 0.000 claims abstract description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 10
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000003830 anthracite Substances 0.000 claims abstract description 10
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000011575 calcium Substances 0.000 claims abstract description 9
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 9
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims abstract description 9
- ZGTMUACCHSMWAC-UHFFFAOYSA-L EDTA disodium salt (anhydrous) Chemical compound [Na+].[Na+].OC(=O)CN(CC([O-])=O)CCN(CC(O)=O)CC([O-])=O ZGTMUACCHSMWAC-UHFFFAOYSA-L 0.000 claims abstract description 6
- 229940124274 edetate disodium Drugs 0.000 claims abstract description 6
- 239000000126 substance Substances 0.000 claims abstract description 5
- 238000001514 detection method Methods 0.000 claims description 21
- 238000002604 ultrasonography Methods 0.000 claims description 9
- 239000007864 aqueous solution Substances 0.000 claims description 8
- 238000005070 sampling Methods 0.000 claims description 7
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 claims description 6
- 150000008051 alkyl sulfates Chemical class 0.000 claims description 6
- APUPEJJSWDHEBO-UHFFFAOYSA-P ammonium molybdate Chemical compound [NH4+].[NH4+].[O-][Mo]([O-])(=O)=O APUPEJJSWDHEBO-UHFFFAOYSA-P 0.000 claims description 6
- 235000018660 ammonium molybdate Nutrition 0.000 claims description 6
- 239000011609 ammonium molybdate Substances 0.000 claims description 6
- 229940010552 ammonium molybdate Drugs 0.000 claims description 6
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims description 6
- 239000012964 benzotriazole Substances 0.000 claims description 6
- 230000033228 biological regulation Effects 0.000 claims description 6
- 150000002191 fatty alcohols Chemical class 0.000 claims description 6
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 6
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 6
- -1 polyoxyethylene oxypropylene glycerol Polymers 0.000 claims description 6
- PPASLZSBLFJQEF-RKJRWTFHSA-M sodium erythorbate Chemical compound [Na+].OC[C@@H](O)[C@H]1OC(=O)C(O)=C1[O-] PPASLZSBLFJQEF-RKJRWTFHSA-M 0.000 claims description 6
- 235000010352 sodium erythorbate Nutrition 0.000 claims description 6
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 claims description 6
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims description 6
- 229960001763 zinc sulfate Drugs 0.000 claims description 6
- 229910000368 zinc sulfate Inorganic materials 0.000 claims description 6
- 238000004064 recycling Methods 0.000 claims description 5
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 4
- 239000000243 solution Substances 0.000 claims description 4
- LXAHHHIGZXPRKQ-UHFFFAOYSA-N 5-fluoro-2-methylpyridine Chemical compound CC1=CC=C(F)C=N1 LXAHHHIGZXPRKQ-UHFFFAOYSA-N 0.000 claims description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 3
- 239000008400 supply water Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims 1
- 229910000975 Carbon steel Inorganic materials 0.000 abstract description 8
- 239000010962 carbon steel Substances 0.000 abstract description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 7
- 239000010949 copper Substances 0.000 abstract description 7
- 229910052802 copper Inorganic materials 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 6
- 230000005764 inhibitory process Effects 0.000 abstract description 5
- 238000004140 cleaning Methods 0.000 abstract description 4
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract description 3
- 239000011777 magnesium Substances 0.000 abstract description 3
- 229910052749 magnesium Inorganic materials 0.000 abstract description 3
- 239000003814 drug Substances 0.000 abstract description 2
- 238000001914 filtration Methods 0.000 abstract description 2
- 239000012535 impurity Substances 0.000 abstract description 2
- 239000005416 organic matter Substances 0.000 abstract description 2
- 238000004321 preservation Methods 0.000 abstract description 2
- XYFCBTPGUUZFHI-UHFFFAOYSA-N Phosphine Chemical compound P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 6
- 239000003945 anionic surfactant Substances 0.000 description 6
- 239000011574 phosphorus Substances 0.000 description 6
- 229910052698 phosphorus Inorganic materials 0.000 description 6
- 229910000073 phosphorus hydride Inorganic materials 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 239000002455 scale inhibitor Substances 0.000 description 4
- 229940123973 Oxygen scavenger Drugs 0.000 description 3
- 239000002518 antifoaming agent Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000006184 cosolvent Substances 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 230000001934 delay Effects 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 230000003628 erosive effect Effects 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 239000003112 inhibitor Substances 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 229920002521 macromolecule Polymers 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002736 nonionic surfactant Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000010963 304 stainless steel Substances 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 241000195493 Cryptophyta Species 0.000 description 1
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000028327 secretion Effects 0.000 description 1
- 235000011888 snacks Nutrition 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229940126680 traditional chinese medicines Drugs 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/14—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus
- C02F5/145—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus combined with inorganic substances
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/08—Corrosion inhibition
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Metallurgy (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The present invention relates to a kind of heat supply network special-purpose non-toxic anti-corrosion methods of steam power plant, belong to a kind of chemical preservation method.Water is run including adjustment, build interim pipeline, open quartz sand and anthracite pretreatment unit 2 hours, EDETATE DISODIUM carries out low concentration ultrasonic cleaning, and citric acid carries out low concentration ultrasonic cleaning, and calgon carries out low concentration ultrasonic cleaning, a heat supply network environment-friendly type organic anti-scale corrosion inhibiter is added, water quality index is detected, terminates anti-corrosion, removes interim pipeline.Advantage is provided to a heating network operation water standard before implementation anti-corrosion；Pretreatment unit, which has carried out filtering to impurity such as silts, ensure that medicament cleaning effect；EDETATE DISODIUM, citric acid, calgon successively carry out low concentration ultrasonic cleaning and effectively remove the soft dirt such as calcium and magnesium hard scale and organic matter, greasy filth, and cleaning effect is thorough；Using corrosion inhibiter, scale inhibition anticorrosion effectively is carried out to 304 stainless steels, copper, carbon steel piping of a heat supply network, ensure that the safe operation of equipment.
Description
Technical field
The invention belongs to a kind of chemical preservation methods, belong to steam power plant's water treatment field.
Background technique
It is instructed currently without anti-corrosion of the relevant criterion to a running heat supply network, the northern area of China heat exchange equipment
With main pipeline because fouling corrosion phenomenon takes place frequently.Leakage booster resulting from not only influences user and normally heats, but also causes huge
Huge economic loss, equipment life greatly shorten, and heating cost increases, and some heat-net-pipelines can only achieve three points of projected life
One of.The characteristics of heat supply network in Jilin Province, is significant, the inorganic salts hard scale of the existing usually calcium and magnesium of water supply pipe；And water return pipeline
Generally there are be by the tiny silt of particle, dust, the purees of insoluble salt, gluey hydroxide, corrosion product, spy
It is not the corpse of bacterium algae and its soft dirt of viscous secretion composition, the main reason for this is underdeposit corrosion.Scale is efficiently removed,
And enhance the scale inhibitor of tube wall, it is a problem to be solved.
Summary of the invention
The present invention provides a kind of heat supply network special-purpose non-toxic anti-corrosion method of steam power plant, to solve the knot of heat supply network of multiple types
Dirty etching problem.
The technical solution adopted by the present invention is that: include the following steps:
(1), adjustment operation water, water supply water temperature are 110~150 DEG C, and return water water temperature is 40~70 DEG C, and other indexs meet
" urban heating network management design specification CJJ 34 ", " heat supply heating system water quality and aseptic technic regulation DJB 01-619 " and " work
Industry Design of Circulation Cooling Water Treatment specification GB 50050 " in relevant regulations；
(2), interim pipeline is built, interim pipeline is built on the water return pipeline of heat-exchanger rig I and heat-exchanger rig II, this faces
Shi Guanlu includes quartz sand and anthracite pretreatment unit pipeline, further includes mixed bed pipeline, between mixed bed pipeline and heat-exchanger rig I
Chemical feeding points are set, which includes Vltrasonic device and dosing pump, in quartz sand and anthracite pretreatment unit pipeline and heat exchange
There is sample point between device II；
(3), quartz sand and anthracite pretreatment unit 2 hours are opened；
(4), EDETATE DISODIUM carries out low concentration ultrasonic cleaning: opening dosing pump and 5%EDTA disodium saline solution is added
In system, ultrasound is carried out during dosing, sample detection is carried out after 2 hours, reached 2.5% when sampling concentration, stop dosing；Again
Secondary circulation carries out total hardness detection after 2 hours, when total hardness is greater than 2200mg/L, unlatching bypass mixed bed, until hardness is less than
1100mg/L is carried out in next step；
(5), citric acid carries out low concentration ultrasonic cleaning: being added 5% aqueous citric acid solution by dosing pump in water return pipeline
Enter in system, carry out ultrasound during dosing, sample detection is carried out after 2 hours, reaches 2.5% when sampling concentration, stop dosing,
Total hardness detection is carried out after recycling 2 hours again, when total hardness is greater than 2200mg/L, unlatching bypass mixed bed, until hardness is less than
1100mg/L is carried out in next step；
(6), calgon carries out low concentration ultrasonic cleaning: passing through dosing pump for 5% calgon in water return pipeline
Ultrasound is carried out in aqueous solution addition system, during dosing, sample detection is carried out after 2 hours, when concentration reaches 2.5%, is stopped
Dosing；Total hardness detection is carried out after recycling 2 hours again, when total hardness is greater than 2200mg/L, unlatching bypass mixed bed, until hardness
Less than 1100mg/L, carry out in next step；
(7), a heat supply network environment-friendly type organic anti-scale corrosion inhibiter is added, circulating water flow G is calculated by formula 1, determines dosing
V is measured, circulation is after 2 hours, and detecting a heat supply network environment-friendly type organic anti-scale corrosion inhibiter, concentration is 2% in systems；
The heat supply network environment-friendly type organic anti-scale corrosion inhibiter: group is grouped as follows in aqueous solution:
10~30mg/L of 2- phosphonic acid butane -1,2,4- tricarboxylic acids；
40~60mg/L of poly- 1- phosphonic acid base -1,2,3- tri carboxyl butane；
4~6mg/L of ammonium molybdate；
4~6mg/L of sodium isoascorbate；
1~3mg/L of zinc sulfate；
100~300mg/L of butyl glycol；
1~3mg/L of benzotriazole；
40~60mg/L of neopelex；
10~30mg/L of ethoxylated alkyl sulfate；
5~15mg/L of fatty alcohol polyoxyethylene ether；
1~3mg/L of polyoxyethylene oxypropylene glycerol；
For hot-water heating system, circulating water flow is calculated by following formula:
G=[Q/c (tg-th)] × 3600=0.86Q/ (tg-th) --- --- (1)
In formula: G- calculates water flow, kg/h；
Q- heat user design heating load；
The specific heat of c- water；
Tg, th- be designed for, return water temperature, DEG C；
Dosage V is calculated by following formula:
V/ (V+G)=2%------- (2)
V- dosage, kg/h；
(8), water quality index is detected；
According to formula 3, formula 4 calculates RSI value IRSI, work as IRSIWhen being 5.8~6.2, anti-corrosion is completed, I is worked asRSIWhen less than 5.8, weight
Multiple step (7), until IRSIIt is 5.8~6.2；
IRSI=2pHs-pH------- (3)
PHs=(9.30+A+B)-(C+D) --- --- --- --- (4)
In formula: A- total dissolved solidss coefficient；B- temperature coefficient；C calcium hardness coefficient；D-M basicity factor.
(9) terminate anti-corrosion, remove interim pipeline.
The invention has the advantages that (1) provides a heating network operation water standard before implementing anti-corrosion；(2) it pre-processes
Device, which has carried out filtering to impurity such as silts, ensure that medicament cleaning effect；(3) EDETATE DISODIUM, citric acid, calgon
It successively carries out low concentration ultrasonic cleaning and effectively removes the soft dirt such as calcium and magnesium hard scale and organic matter, greasy filth, cleaning effect is thorough；(4) it adopts
With a heat supply network environment-friendly type organic anti-scale corrosion inhibiter, scale inhibition effectively is carried out to 304 stainless steels, copper, carbon steel piping of a heat supply network
Anti-corrosion ensure that the safe operation of equipment.
Detailed description of the invention
Fig. 1 is the interim pipeline schematic diagram that the present invention is built.
Specific embodiment
Embodiment 1
Include the following steps:
(1), adjustment operation water, water supply water temperature are 110~150 DEG C, and return water water temperature is 40~70 DEG C, and other indexs meet
" urban heating network management design specification CJJ 34 ", " heat supply heating system water quality and aseptic technic regulation DJB 01-619 " and " work
Industry Design of Circulation Cooling Water Treatment specification GB 50050 " in relevant regulations, be specifically shown in Table in 1 related parameter:
1 heating network operation water water quality of table
(2), interim pipeline is built, sees Fig. 1；
Interim pipeline is built on the water return pipeline of heat-exchanger rig I and heat-exchanger rig II, which includes quartz sand
With anthracite pretreatment unit pipeline, further include mixed bed pipeline, chemical feeding points are set between mixed bed pipeline and heat-exchanger rig I, should add
Snack made with traditional Chinese medicines includes Vltrasonic device and dosing pump, has sampling between quartz sand and anthracite pretreatment unit pipeline and heat-exchanger rig II
Point；
(3), quartz sand and anthracite pretreatment unit 2 hours are opened；
(4), EDETATE DISODIUM carries out low concentration ultrasonic cleaning: opening dosing pump and 5%EDTA disodium saline solution is added
In system, ultrasound is carried out during dosing, sample detection is carried out after 2 hours, reached 2.5% when sampling concentration, stop dosing；Again
Secondary circulation carries out total hardness detection after 2 hours, when total hardness is greater than 2200mg/L, unlatching bypass mixed bed, until hardness is less than
1100mg/L is carried out in next step；
(5), citric acid carries out low concentration ultrasonic cleaning: being added 5% aqueous citric acid solution by dosing pump in water return pipeline
Enter in system, carry out ultrasound during dosing, sample detection is carried out after 2 hours, reaches 2.5% when sampling concentration, stop dosing,
Total hardness detection is carried out after recycling 2 hours again, when total hardness is greater than 2200mg/L, unlatching bypass mixed bed, until hardness is less than
1100mg/L is carried out in next step；
(6), calgon carries out low concentration ultrasonic cleaning: passing through dosing pump for 5% calgon in water return pipeline
Ultrasound is carried out in aqueous solution addition system, during dosing, sample detection is carried out after 2 hours, when concentration reaches 2.5%, is stopped
Dosing；Total hardness detection is carried out after recycling 2 hours again, when total hardness is greater than 2200mg/L, unlatching bypass mixed bed, until hardness
Less than 1100mg/L, carry out in next step；
(7), a heat supply network environment-friendly type organic anti-scale corrosion inhibiter is added, circulating water flow G is calculated by formula 1, determines dosing
V is measured, circulation is after 2 hours, and detecting a heat supply network environment-friendly type organic anti-scale corrosion inhibiter, concentration is 2% in systems；
The heat supply network environment-friendly type organic anti-scale corrosion inhibiter: group is grouped as follows in aqueous solution:
Organic phosphine scale inhibitor: 2- phosphonic acid butane -1,2,4- tricarboxylic acids 10mg/L；
The low phosphine antisludging agent of macromolecule: poly- 1- phosphonic acid base -1,2,3- tri carboxyl butane 40mg/L；
Carbon steel corrosion inhibitor: ammonium molybdate 4mg/L；
Oxygen scavenger: sodium isoascorbate 4mg/L；
Cathode deposition model corrosion inhibiter: zinc sulfate 1mg/L；
Cosolvent: butyl glycol 100mg/L；
The corrosion inhibiter of copper: benzotriazole 1mg/L；
Anionic surfactant: neopelex 40mg/L；
Anionic surfactant: ethoxylated alkyl sulfate 10mg/L；
Nonionic surfactant: fatty alcohol polyoxyethylene ether 5mg/L；
Defoaming agent: polyoxyethylene oxypropylene glycerol 1mg/L；
For hot-water heating system, circulating water flow is calculated by following formula:
G=[Q/c (tg-th)] × 3600=0.86Q/ (tg-th) --- --- (1)
In formula: G- calculates water flow, kg/h；
Q- heat user design heating load；
The specific heat of c- water；
Tg, th- be designed for, return water temperature, DEG C；
Dosage V is calculated by following formula:
V/ (V+G)=2%------- (2)
V- dosage, kg/h；
(8), water quality index is detected；
According to formula 3, formula 4 calculates RSI value IRSI, work as IRSIWhen being 5.8~6.2, anti-corrosion is completed, I is worked asRSIWhen less than 5.8, weight
Multiple step (7), until IRSIIt is 5.8~6.2；
IRSI=2pHs-pH------- (3)
PHs=(9.30+A+B)-(C+D) --- --- --- --- (4)
In formula: A- total dissolved solidss coefficient；B- temperature coefficient；C calcium hardness coefficient；D-M basicity factor.
(9) terminate anti-corrosion, remove interim pipeline.
Embodiment 2
In step (7), group is grouped as follows in aqueous solution:
Organic phosphine scale inhibitor: 2- phosphonic acid butane -1,2,4- tricarboxylic acids 20mg/L；
The low phosphine antisludging agent of macromolecule: poly- 1- phosphonic acid base -1,2,3- tri carboxyl butane 50mg/L；
Carbon steel corrosion inhibitor: ammonium molybdate 5mg/L；
Oxygen scavenger: sodium isoascorbate 5mg/L；
Cathode deposition model corrosion inhibiter: zinc sulfate 2mg/L；
Cosolvent: butyl glycol 200mg/L；
The corrosion inhibiter of copper: benzotriazole 2mg/L；
Anionic surfactant: neopelex 50mg/L；
Anionic surfactant: ethoxylated alkyl sulfate 20mg/L；
Nonionic surfactant: fatty alcohol polyoxyethylene ether 10mg/L；
Defoaming agent: polyoxyethylene oxypropylene glycerol 2mg/L；
Other steps are the same as embodiment 1.
Embodiment 3
In step (7), group is grouped as follows in aqueous solution:
Organic phosphine scale inhibitor: 2- phosphonic acid butane -1,2,4- tricarboxylic acids 30mg/L；
The low phosphine antisludging agent of macromolecule: poly- 1- phosphonic acid base -1,2,3- tri carboxyl butane 60mg/L；
Carbon steel corrosion inhibitor: ammonium molybdate 6mg/L；
Oxygen scavenger: sodium isoascorbate 6mg/L；
Cathode deposition model corrosion inhibiter: zinc sulfate 3mg/L；
Cosolvent: butyl glycol 300mg/L；
The corrosion inhibiter of copper: benzotriazole 3mg/L；
Anionic surfactant: neopelex 60mg/L；
Anionic surfactant: ethoxylated alkyl sulfate 30mg/L；
Nonionic surfactant: fatty alcohol polyoxyethylene ether 15mg/L；
Defoaming agent: polyoxyethylene oxypropylene glycerol 3mg/L；
Other steps are the same as embodiment 1.
Effect of the present invention is further illustrated by specific experiment example below.
Experimental example 1
Changchun steam power plant has a heat supply network, and pipeline is 304 stainless steel materials, quantity of circulating water 340t/h.It takes primary
70 DEG C of heating network operation water sample, through testing result such as table 2.
2 water sample of table
| The project indicator | Numerical value |
| pH | 9.46 |
| Hardness/(mgL-1) | 500 |
| Turbidity/NTU | 6.20 |
| Basicity/(mgL-1) | 500 |
| Cl-/(mg·L-1) | 80 |
| Soluble solids mass concentration/(mgL-1) | 900 |
| Total iron/(mgL-1) | 0.2 |
Using calculating Ryzna index of stability (IRSI) carry out fouling or corrosion tendency calculating:
IRSI=2pHs-pH
PHs=(9.30+A+B)-(C+D)
In formula: A is total dissolved solidss coefficient；B is temperature coefficient；C is calcium hardness coefficient；D to M is basicity factor.
According to table 2 as a result, calculating IRSI< 3.7 illustrates that the water sample has serious scale tendency；And the lower corruption of dirt occurs repeatedly
Pipe explosion accident caused by losing.
After 2014 by using the method for the present invention anti-corrosion, so that IRSI6.0 are risen to, fouling tendency weakens, and scale inhibition delays
Erosion, fouling rate respectively reach 98.11%, 98.21%, 97.32%.Detection phosphorus content is only 0.01% after operation water is added,
Conventional value much smaller than 5%, total phosphorus concentration 0.007mg/L are lower than 1.0mg/L (GB8978 " integrated wastewater discharge standard "),
It is economic and environment-friendly, ambient enviroment will not be polluted tube wall occurs and leaks.So far it has been safely operated more than 3 years, pipe cutting inspection and has hung
Piece test display, the corrosion rate of stainless steel tube wall is only 0.002mm/a, and the specified value less than 0.005mm/a ensure that production
Safety carry out.
Experimental example 2
White mountain steam power plant has a heat supply network, and pipeline is carbon steel material, quantity of circulating water 240t/h.
50 DEG C of heating network operation water sample is taken, through testing result such as table 3.
3 water sample of table
| The project indicator | Numerical value |
| pH | 10.5 |
| Hardness/(mgL-1) | 550 |
| Turbidity/NTU | 6.10 |
| Basicity/(mgL-1) | 550 |
| Cl-/(mg·L-1) | 100 |
| Soluble solids mass concentration/(mgL-1) | 1000 |
| Total iron/(mgL-1) | 0.8 |
Using calculating Ryzna index of stability (IRSI) carry out fouling or corrosion tendency calculating:
IRSI=2pHs-pH
PHs=(9.30+A+B)-(C+D)
In formula: A is total dissolved solidss coefficient；B is temperature coefficient；C is calcium hardness coefficient；D to M is basicity factor.
According to table 3 as a result, calculating IRSI< 3.7 illustrates that the water sample has serious scale tendency.And the lower corruption of dirt occurs repeatedly
Pipe explosion accident caused by losing.
After 2015 by using the method for the present invention anti-corrosion, so that IRSI6.0 are risen to, fouling tendency weakens, and scale inhibition delays
Erosion, fouling rate respectively reach 98.27%, 98.23%, 97.45%.Detection phosphorus content is only 0.005% after operation water is added,
Specified value much smaller than 5%, total phosphorus concentration 0.035mg/L are lower than 1.0mg/L (GB8978 " integrated wastewater discharge standard "),
It is economic and environment-friendly, ambient enviroment will not be polluted tube wall occurs and leaks.So far it has been safely operated more than 2 years, pipe cutting inspection and has hung
Piece test display, the corrosion rate of carbon steel tube wall is only 0.050mm/a, and the specified value less than 0.075mm/a ensure that production
Safety carries out.
Experimental example 3
Baicheng steam power plant has a heat supply network, and pipeline contains copper material, quantity of circulating water 240t/h.
60 DEG C of heating network operation water sample is taken, through testing result such as table 4.
4 water sample of table
| The project indicator | Numerical value |
| pH | 9.5 |
| Hardness/(mgL-1) | 700 |
| Turbidity/NTU | 9.10 |
| Basicity/(mgL-1) | 900 |
| Cl-/(mg·L-1) | 79 |
| Soluble solids mass concentration/(mgL-1) | 1000 |
| Total iron/(mgL-1) | 0.1 |
Using calculating Ryzna index of stability (IRSI) carry out fouling or corrosion tendency calculating:
IRSI=2pHs-pH
PHs=(9.30+A+B)-(C+D)
In formula: A is total dissolved solidss coefficient；B is temperature coefficient；C is calcium hardness coefficient；D to M is basicity factor.
According to table 4 as a result, calculating IRSI< 3.7 illustrates that the water sample has serious scale tendency.And the lower corruption of dirt occurs repeatedly
Pipe explosion accident caused by losing.
After 2014 by using the method for the present invention anti-corrosion, so that IRSI6.0 are risen to, fouling tendency weakens, and scale inhibition delays
Erosion, fouling rate respectively reach 98.17%, 98.43%, 97.27%.Detection phosphorus content is only 0.01% after operation water is added,
Conventional value much smaller than 5%, total phosphorus concentration 0.007mg/L are lower than 1.0mg/L (GB8978 " integrated wastewater discharge standard "),
It is economic and environment-friendly, ambient enviroment will not be polluted tube wall occurs and leaks.So far it has been safely operated more than 3 years, pipe cutting inspection and has hung
Piece test display, the corrosion rate of copper pipe wall is only 0.001mm/a, and the specified value less than 0.005mm/a ensure that the peace of production
It is complete to carry out.
By experimental example application, 304 stainless steels, carbon steel, cupric are being used using that can apply after the method for the present invention anti-corrosion
In the heat exchange pipeline of pipe fitting and a heat supply network of heat exchanger, it has excellent performance, effect stability.
Claims (3)
1. a kind of heat supply network special-purpose non-toxic anti-corrosion method of steam power plant, characterized in that it comprises the following steps:
(1), adjustment operation water, water supply water temperature are 110~150 DEG C, and return water water temperature is 40~70 DEG C, and other indexs meet " cities and towns
Heat supply network management design specification CJJ 34 ", " heat supply heating system water quality and aseptic technic regulation DJB 01-619 " and " industrial cycle
Cold water process design specification GB 50050 " in relevant regulations；
(2), interim pipeline is built, interim pipeline is built on the water return pipeline of heat-exchanger rig I and heat-exchanger rig II, the interim pipe
Road includes quartz sand and anthracite pretreatment unit pipeline, further includes mixed bed pipeline, is arranged between mixed bed pipeline and heat-exchanger rig I
Chemical feeding points, which includes Vltrasonic device and dosing pump, in quartz sand and anthracite pretreatment unit pipeline and heat-exchanger rig
There is sample point between II；
(3), quartz sand and anthracite pretreatment unit 2 hours are opened；
(4), EDETATE DISODIUM carries out low concentration ultrasonic cleaning: opening dosing pump for 5%EDTA disodium saline solution and system is added
In, ultrasound is carried out during dosing, sample detection is carried out after 2 hours, reaches 2.5% when sampling concentration, stops dosing；It follows again
Total hardness detection is carried out after ring 2 hours, when total hardness is greater than 2200mg/L, unlatching bypass mixed bed, until hardness is less than 1100mg/
L is carried out in next step；
(5), citric acid carries out low concentration ultrasonic cleaning: system is added in 5% aqueous citric acid solution by dosing pump in water return pipeline
In system, ultrasound is carried out during dosing, sample detection is carried out after 2 hours, reached 2.5% when sampling concentration, stop dosing, again
Circulation carries out total hardness detection after 2 hours, when total hardness is greater than 2200mg/L, unlatching bypass mixed bed, until hardness is less than
1100mg/L is carried out in next step；
(6), calgon carries out low concentration ultrasonic cleaning: by dosing pump that 5% calgon is water-soluble in water return pipeline
Ultrasound is carried out in liquid addition system, during dosing, sample detection is carried out after 2 hours, when concentration reaches 2.5%, stops dosing；
Total hardness detection is carried out after recycling 2 hours again, when total hardness is greater than 2200mg/L, unlatching bypass mixed bed, until hardness is less than
1100mg/L is carried out in next step；
(7), a heat supply network environment-friendly type organic anti-scale corrosion inhibiter is added, circulating water flow G is calculated by formula (1), determines dosage
V, circulation is after 2 hours, and detecting a heat supply network environment-friendly type organic anti-scale corrosion inhibiter, concentration is 2% in systems；
For hot-water heating system, circulating water flow is calculated by following formula:
G=[Q/c (tg-th)] × 3600=0.86Q/ (tg-th) --- --- (1)
In formula: G- calculates water flow, kg/h；
Q- heat user design heating load；
The specific heat of c- water；
Tg, th- be designed for, return water temperature, DEG C；
Dosage V is calculated by following formula:
V/ (V+G)=2%------- (2)
V- dosage, kg/h；
(8), water quality index is detected；
According to formula (3), formula (4) calculates RSI value IRSI, work as IRSIWhen being 5.8~6.2, anti-corrosion is completed, I is worked asRSIWhen less than 5.8,
It repeats step (7), until IRSIIt is 5.8~6.2；
IRSI=2pHs-pH------- (3)
PHs=(9.30+A+B)-(C+D) --- --- --- --- (4)
In formula: A- total dissolved solidss coefficient；B- temperature coefficient；C calcium hardness coefficient；D-M basicity factor；
(9) terminate anti-corrosion, remove interim pipeline.
2. heat supply network special-purpose non-toxic anti-corrosion method of a kind of steam power plant according to claim 1, which is characterized in that described one
Secondary heat supply network environment-friendly type organic anti-scale corrosion inhibiter: group is grouped as follows in aqueous solution:
10~30mg/L of 2- phosphonic acid butane -1,2,4- tricarboxylic acids；
40~60mg/L of poly- 1- phosphonic acid base -1,2,3- tri carboxyl butane；
4~6mg/L of ammonium molybdate；
4~6mg/L of sodium isoascorbate；
1~3mg/L of zinc sulfate；
100~300mg/L of butyl glycol；
1~3mg/L of benzotriazole；
40~60mg/L of neopelex；
10~30mg/L of ethoxylated alkyl sulfate；
5~15mg/L of fatty alcohol polyoxyethylene ether；
1~3mg/L of polyoxyethylene oxypropylene glycerol.
3. heat supply network special-purpose non-toxic anti-corrosion method of a kind of steam power plant according to claim 2, which is characterized in that described one
Secondary heat supply network environment-friendly type organic anti-scale corrosion inhibiter: group is grouped as follows in aqueous solution:
2- phosphonic acid butane -1,2,4- tricarboxylic acids 20mg/L；
Poly- 1- phosphonic acid base -1,2,3- tri carboxyl butane 50mg/L；
Ammonium molybdate 5mg/L；
Sodium isoascorbate 5mg/L；
Zinc sulfate 2mg/L；
Butyl glycol 200mg/L；
Benzotriazole 2mg/L；
Neopelex 50mg/L；
Ethoxylated alkyl sulfate 20mg/L；
Fatty alcohol polyoxyethylene ether 10mg/L；
Polyoxyethylene oxypropylene glycerol 2mg/L.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101417838A (en) * | 2008-11-21 | 2009-04-29 | 韶关市雅鲁环保实业有限公司 | Scale and corrosion inhibitor formula for high concentration multiple operation of recirculated cooling water system and method of use thereof |
| CN104451026A (en) * | 2014-11-17 | 2015-03-25 | 武钢集团昆明钢铁股份有限公司 | Online cleaning and pre-filming method of converter clean circulating water system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101417838A (en) * | 2008-11-21 | 2009-04-29 | 韶关市雅鲁环保实业有限公司 | Scale and corrosion inhibitor formula for high concentration multiple operation of recirculated cooling water system and method of use thereof |
| CN104451026A (en) * | 2014-11-17 | 2015-03-25 | 武钢集团昆明钢铁股份有限公司 | Online cleaning and pre-filming method of converter clean circulating water system |
Non-Patent Citations (1)
| Title |
|---|
| 电厂反渗透的运行与维护;无;《豆丁网》;20120813;第1-4页 |
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