CN107986410A - A kind of method of power plant's treating nature water - Google Patents
A kind of method of power plant's treating nature water Download PDFInfo
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- CN107986410A CN107986410A CN201711296668.5A CN201711296668A CN107986410A CN 107986410 A CN107986410 A CN 107986410A CN 201711296668 A CN201711296668 A CN 201711296668A CN 107986410 A CN107986410 A CN 107986410A
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The present invention relates to a kind of method of power plant's treating nature water, comprise the following steps：1) corresponding coagulant is put into accessing pending water according to the concentration of 10 60ppm；2) flocculation aid is put into while stirring, and the dosage of flocculation aid is 1ppm；3) react, after no longer there is sedimentation, filtering, supernatant is the water sample after handling.The present invention, which solves existing coagulation treatment method, can only remove sub-fraction organic matter in water, boiler water technical problem not up to standard, and the present invention can effectively remove colloidal substance but also remove organic matter to greatest extent.
Description
Technical field
The invention belongs to power plant's original sub-block field.
Background technology
In thermal power plant, after water enters boiler, the thermal energy that fuel (coal, oil or natural gas) burning is released is absorbed, is turned
Become steam, import steam turbine；In steam turbine, the thermal energy of steam is into mechanical energy, and steam turbine drives generator, by machinery
Electric energy can be transformed into again.As it can be seen that water, steam circulation system are the important components in thermal power plant, boiler and steam turbine are
The capital equipment of thermal power generation.Boiler feed water in thermal power plant, if without purified treatment or dealt with improperly, it will draw
Play heat power equipment fouling, heat power equipment and system corrosion, superheater and steam turbine circulation part salification.Power plant quote raw water be
Natural water, the impurity in natural water press the difference of its granular size, are commonly divided into suspended matter, colloidal substance and dissolving material three
Major class, and colloidal substance therein is generally divided into organic matter colloid and mineral matter colloid, organic matter colloid is due to animals and plants
In water rot and decompose and generate；Mineral matter colloid is mainly the compound of iron, aluminium and silicon.Colloid in natural water can be dirty
Ion exchange resin is contaminated, reduces its exchange capacity.After colloid enters boiler, boiler water can be caused degrading, caused in boiler
Portion's fouling, boiler water pH value decline or produce foam, deteriorate steam quality；Organic matter can also be converted into organic acid in the boiler
Into in steam, cause steam turbine low-pressure section partition plate, the heavy corrosion of cylinder body.In short, the colloid in natural water is to thermal power generation
The safety of factory's water treatment facilities and heat power equipment, economical operation have very big harm.Therefore, natural water enters ion-exchanger
Colloidal substance must thoroughly be removed in the past.
The colloidal substance in natural water is removed, generally use coagulating treatment, makes colloidal substance electrically charged be neutralized of institute and coagulate
Flocculent substance is polymerized to be precipitated out from water.In addition, when content of organics is larger in open water supply, coagulating treatment can only remove
A part of organic matter, the water quality of boiler water just do not reach water standard, with the passing of time duration, can cause the ratio of silicic acid in boiler water to increase
Greatly, steam carries SiO2Amount also increase, the organic acid decomposited can also be to the iron and steel parts of steam path, and steamer
Machine blade has corrosiveness.Organic matter enters caused harmful effect in stove in order to prevent, should improve raw water coagulating treatment
Effect as far as possible in coagulating treatment to remove some organic matters more.
The content of the invention
Sub-fraction organic matter in water, boiler water skill not up to standard can only be removed in order to solve existing coagulation treatment method
Art problem, the present invention provide a kind of method of power plant's treating nature water, and the present invention can effectively remove colloidal substance but also maximum
Limit removes organic matter.
The technical solution of the present invention：
A kind of method of power plant's treating nature water, it, which is characterized in that, comprises the following steps：
1) corresponding coagulant is put into accessing pending water according to the concentration of 10-60ppm；
2) flocculation aid is put into while stirring, and the dosage of flocculation aid is 1ppm；
3) react, after no longer there is sedimentation, filtering, supernatant is the water sample after handling.
Further, the coagulant is aluminium polychloride (PAC), polyaluminum ferric chloride (PAFC) or bodied ferric sulfate
(PFS)。
Further, the stirring in step 2) according to time order and function order include quick stirring, moderate-speed mixer and at a slow speed compared with
Slowly；Quick stirring is to stir 40s-1min with the speed of 400-500r/min；Moderate-speed mixer is to be stirred with the speed of 200r/min
4min-8min；Mix slowly to stir 8-12min with the speed of 50-100r/min.
Further, the flocculation aid added in step 2) is polyacrylamide (PAM), and flocculation aid is thrown in quickly stirring period
Add or add in the moderate-speed mixer time or added mixing slowly the time.
Further, 30ppm polyaluminum ferric chloride (PAFC) is put into pending water sample, mixing speed is respectively quick
Stirring 500r/min, moderate-speed mixer 200r/min, mix slowly 50r/min；Mixing time is respectively quickly to stir 1min, middling speed
8min is stirred, mixes slowly 8min, and 1ppm flocculation aids (PAM) are put into moderate-speed mixer.
Beneficial effect possessed by the present invention：
1st, the method that the present invention uses coagulant multi-step dosage, is handled according to the index given by the present invention, can be effective
Organic matter can be removed to greatest extent again by removing colloidal substance in power plant's raw water.
2nd, optimal processing result of the invention is：The COD of raw water sample is 17.82mg/L, turbidity 11.02NTU, basicity are
3.41mmol/L；After processing the COD of water sample be 3.02mg/L, turbidity 0.08NTU, basicity 2.51mmol/L.This illustrates this
Scheme to the removal effect of the COD of water sample and turbidity clearly.
Embodiment
Basicity represents to contain OH in water–、CO3 2–、HCO3 –Amount and some other weak acid salt amount summation.Alleged by the present invention
Basicity, just refer to total alkalinity, i.e. methyl orange alkalinity.Using methyl orange as indicator.When terminal pH is 4.3~4.5, HCO3 –With
CO3 2–It is neutralized into H2CO3, OH–It is neutralized into H2O.The unit of basicity is mmol/L (H+)。
The method of survey turbidity is the instrument test method being commonly used used by institute of the invention, unit NTU.
Using oxygen demand come to characterize the how many principle of organic matter be to have oxidable general character based on organic matter.Common height
Potassium manganate oxygen demand method is：Under certain condition, with oxidant (KMnO4) processing water sample, measure what is consumed in its reaction process
Oxidant content, its unit mg/L (O2) represent, the oxidant content that will be consumed is converted into O2To represent.Represented by oxygen demand
Whole oxidizable materials actually in water, although wherein mainly organic matter, does not exempt from have some inorganic matters ginseng sometimes
With reaction, such as Fe2+Deng.
The raw water property used in the present invention：T=17.5 DEG C, pH=7.82, turbidity=11.021NTU, basicity=
3.41mmol/L CODMn=17.82mg/L.
Embodiment 1：Measure the pending raw water samples of four parts of 1000ml to be placed in four large beakers, add and divide in each beaker
Not Jia Ru 10ppm, 29ppm, 41ppm and 60ppm aluminium polychloride (PAC)；Then (400r/min) 40s is quickly stirred, in
Speed stirring (200r/min) 6min, mixes slowly (100r/min) 10min, and the PAM of 1ppm is put into quick stirring.Reaction
Observed after beginning and record phenomenon, start the COD of measure water sample supernatant (at 2~3cm of liquid level) after sedimentation 30minMn(mg/
L), turbidity (NTU) and basicity (mmol/L), concrete outcome such as table 1：
The result that table 1 is handled using four kinds of difference PAC dosages
Embodiment 2：Measure the pending raw water samples of four parts of 1000ml to be placed in four large beakers, add and divide in each beaker
Not Jia Ru 20ppm, 25ppm, 30ppm and 35ppm coagulant polymeric aluminium chloride ferrum (PAFC)；Then (500r/ is quickly stirred
Min) 1min, moderate-speed mixer (200r/min) 8min, mix slowly (50r/min) 8min, and put into 1ppm in quick stirring
PAM.Reaction is observed after starting and records phenomenon, starts to measure water sample supernatant after settling 30min (at 2~3cm of liquid level)
CODMn(mg/L), turbidity (NTU) and basicity (mmol/L), concrete outcome such as table 2：
The result that table 2 is handled using four kinds of difference PAFC dosages
Embodiment 3：Measure 1000ml to be placed in large beaker, add the coagulant polymeric aluminium chloride ferrum of 30ppm and 35ppm
(PAFC)；Then (500r/min) 1min is quickly stirred, moderate-speed mixer (200r/min) 8min, mixes slowly (50r/min)
8min, and in moderate-speed mixer put into 1ppm PAM.Reaction is observed after starting and records phenomenon, starts to measure after settling 30min
The COD of water sample supernatant (at 2~3cm of liquid level)Mn(mg/L) it is 3.02, turbidity (NTU) is 0.08 and basicity (mmol/L) is
2.51。
Embodiment 4：Measure the pending raw water samples of three parts of 1000ml to be placed in three large beakers, add and divide in each beaker
Not Jia Ru 25ppm PFS；Then (500r/min) 1min is quickly stirred, moderate-speed mixer (200r/min) 8min, mixes slowly
(50r/min) 8min, and while putting into PAM, the moderate-speed mixer of 1ppm in quick stirring respectively put into the PAM of 1ppm, stir at a slow speed
The PAM of 1ppm is put into when mixing.Reaction is observed after starting and records phenomenon, starts to measure water sample supernatant (away from liquid after settling 30min
At 2~3cm of face) CODMn(mg/L), turbidity (NTU) and basicity (mmol/L), concrete outcome such as table 3：
Table 3 adds PAM handling results in three different phases
Claims (5)
- A kind of 1. method of power plant's treating nature water, it is characterised in that comprise the following steps：1) corresponding coagulant is put into accessing pending water according to the concentration of 10-60ppm；2) flocculation aid is put into while stirring, and the dosage of flocculation aid is 1ppm；3) react, after no longer there is sedimentation, filtering, supernatant is the water sample after handling.
- 2. the method for power plant's treating nature water according to claim 1, it is characterised in that：The coagulant is polyaluminium Aluminium (PAC), polyaluminum ferric chloride (PAFC) or bodied ferric sulfate (PFS).
- 3. the method for power plant's treating nature water according to claim 1, it is characterised in that：Stirring in step 2) according to when Between sequencing include quick stirring, moderate-speed mixer and slower at a slow speed；Quick stirring is to be stirred with the speed of 400-500r/min 40s-1min；Moderate-speed mixer is to stir 4min-8min with the speed of 200r/min；Mix slowly as with the speed of 50-100r/min Degree stirring 8-12min.
- 4. the method for power plant's treating nature water according to claim 3, it is characterised in that：The flocculation aid added in step 2) For polyacrylamide (PAM), flocculation aid adds in quick stirring period or when the moderate-speed mixer time adds or is mixing slowly Between add.
- 5. the method for power plant's treating nature water according to claim 1, it is characterised in that：Put into pending water sample 30ppm polyaluminum ferric chloride (PAFC), mixing speed are respectively quick stirring 500r/min, moderate-speed mixer 200r/min, at a slow speed Stir 50r/min；Mixing time is respectively quick stirring 1min, and moderate-speed mixer 8min, mixes slowly 8min, and in moderate-speed mixer When put into 1ppm flocculation aids (PAM).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711296668.5A CN107986410A (en) | 2017-12-08 | 2017-12-08 | A kind of method of power plant's treating nature water |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711296668.5A CN107986410A (en) | 2017-12-08 | 2017-12-08 | A kind of method of power plant's treating nature water |
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| CN107986410A true CN107986410A (en) | 2018-05-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108947006A (en) * | 2018-07-20 | 2018-12-07 | 江苏力祺环保科技有限公司 | A kind of sewage water treatment method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101318747A (en) * | 2008-07-17 | 2008-12-10 | 山东电力研究院 | Advanced treatment method for urban water of electric power plant |
| CN101613159A (en) * | 2009-08-10 | 2009-12-30 | 重庆大学 | The treatment process of waste circulating cooling water in heat-engine plant |
| CN101985382A (en) * | 2010-10-25 | 2011-03-16 | 国网技术学院 | Advanced treatment method of urban reclaimed water for power plant |
| CN103964643A (en) * | 2014-05-19 | 2014-08-06 | 国家电网公司 | Method for deeply treating reclaimed water for supplementary water of circulating cooling water for heat-engine plants |
-
2017
- 2017-12-08 CN CN201711296668.5A patent/CN107986410A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101318747A (en) * | 2008-07-17 | 2008-12-10 | 山东电力研究院 | Advanced treatment method for urban water of electric power plant |
| CN101613159A (en) * | 2009-08-10 | 2009-12-30 | 重庆大学 | The treatment process of waste circulating cooling water in heat-engine plant |
| CN101985382A (en) * | 2010-10-25 | 2011-03-16 | 国网技术学院 | Advanced treatment method of urban reclaimed water for power plant |
| CN103964643A (en) * | 2014-05-19 | 2014-08-06 | 国家电网公司 | Method for deeply treating reclaimed water for supplementary water of circulating cooling water for heat-engine plants |
Non-Patent Citations (1)
| Title |
|---|
| 王祥三: "《水污染控制工程》", 30 June 2007, 武汉大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108947006A (en) * | 2018-07-20 | 2018-12-07 | 江苏力祺环保科技有限公司 | A kind of sewage water treatment method |
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Application publication date: 20180504 |