CN105417668A - Novel composite alkalizer and application thereof - Google Patents
Novel composite alkalizer and application thereof Download PDFInfo
- Publication number
- CN105417668A CN105417668A CN201510999763.6A CN201510999763A CN105417668A CN 105417668 A CN105417668 A CN 105417668A CN 201510999763 A CN201510999763 A CN 201510999763A CN 105417668 A CN105417668 A CN 105417668A
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- Prior art keywords
- basifier
- vapour
- liquid
- compound
- phase alkali
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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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
Abstract
The invention discloses a novel composite alkalizer for a nuclear power station secondary circuit. The novel composite alkalizer is prepared by a dual-component or multi-component volatile alkalescence substance. The composite alkalizer comprises at least one of alkalescence category A substances with a gas-liquid distribution factor being greater than 1 at temperature of 150-300 DEG C and one of alkalescence category B substances with the gas-liquid distribution factor being less than 1 at the temperature of 150-300 DEG C, and the composite alkalizer can satisfy the following conditions: when first gas-liquid distribution is generated at the temperature of 150-300 DEG C, a ratio K of total mole concentration of vapor-phase alkali to total mole concentration of liquid-phase alkali is 1.0-1.5, when second gas-liquid distribution is generated at the temperature of 150-300 DEG C, and the ratio K of total mole concentration of vapor-phase alkali to total mole concentration of liquid-phase alkali is 0.5-1.0. According to the invention, the composite alkalizer can avoid or reduce the problems that due to usage of single inorganic ammonia or organic amine, environment pollution is generated, operation burden of a mixed bed is increased, operation cost is high, and iron ions content in condensed water is high due to excessively low pH value.
Description
Technical field
The invention belongs to Nuclear power plants water chemistry field, be specifically related to a kind of NEW TYPE OF COMPOSITE basifier and uses thereof.
Background technology
In the in-service nuclear power generating sets of current China, the secondary circuit of most nuclear power generating sets adopts full volatilization (AVT) water chemistry treatment technology, namely by adding ammonia (NH
3) and diamine (N
2h
4) to control pH value and the oxygen level of secondary coolant circuit system respectively.But the vapour-liquid distribution factor of ammonia is higher, during high temperature, most of ammonia is present in vapour phase, in liquid phase, ammonia content is seriously on the low side, make the position pH value such as nuclear power station secondary loop separator system, high pressure heater system, deoxygenator system, low pressure heater system, steam converter system, feedwater heating apparatus drained water recovery system, turbine driven feedwater pump system, main feedpump steam turbine drained water recovery system, feedwater flow Controlling System, steam-turbine and draining system on the low side, very easily cause these positions that flowing accelerated corrosion (FAC) occurs.The FAC accident occurring in Japanese Mihama NPP and Sa Li nuclear power plant of the U.S. once caused mass casualties and huge property damage.Not long ago, certain nuclear power generating sets run duration domestic finds that the hydrophobic collector of secondary circuit 90 degree of joints are leaked, and overhaul subsequently carries out thickness measuring inspection to this collector, found that this hydrophobic collector wall thickness is obviously thinning, thinnest part is only 3mm, and the former specification of this collector pipeline section is φ 219 × 9mm.
For the FAC problem that AVT water chemistry technology is brought, MIT proposes high ph-values and entirely to volatilize water technology (High-AVT), and the China designed by MIT three nuclear powers and Haiyang nuclear power (AP1000 unit) are intended selecting this technical scheme.The essence of this technical scheme is: under the prerequisite not changing basifier kind and vapour-liquid distribution character thereof, improve the total content of ammonia in secondary circuit feedwater, thus improve absolute concentration and the pH value of ammonia in the positions such as secondary circuit draining system, vehicle repair major streaming system, reach the object preventing FAC.But there is report to point out that this technical scheme is not suitable for the secondary coolant circuit system having cupric equipment, and greatly can shorten the secondary circuit condensate polishing treatment mixed bed cycle of operation, increase mixed bed regeneration times and soda acid consumption, increase operations staff's work load.
For preventing FAC problem, the U.S., France then propose and adopt organic amine (as thanomin, morpholine) to substitute the technical scheme of ammonia as secondary circuit basifier, and the CAP1400 of China's independent research intends adopting thanomin water chemistry control techniques.The essence of this technical scheme is: the vapour-liquid distribution factor of organic amine is lower, during high temperature, most of organic amine is present in liquid phase, thus effectively can improve absolute concentration and the pH value of organic amine in secondary circuit draining system, vehicle repair major streaming system, and reach the object preventing FAC.Domestic and international Nuclear power plants the actual running results shows: organic amine water chemistry technology effectively can slow down the flowing accelerated corrosion at the position such as secondary circuit draining system and vehicle repair major streaming system, lower the iron concentration in draining system (as separator is hydrophobic), and then reduce the deposition of iron ion to the migration in vapour generator and oxide compound thereof.But still there is following drawback in single organic amine water chemistry technology:
1) the identical pH value of feedwater will be maintained, the add-on (mass concentration) of organic amine must significantly higher than ammonia, and the price of thanomin is that (morpholine is 2.3 dollars/kilogram for seven to ten times of ammonia, thanomin is 1.5 dollars/kilogram, strong aqua is about 0.2 dollar/kilogram), therefore nuclear power plant's working cost is higher.As can be seen from Table 1, after Qinshan first phase secondary circuit water-chemical regime transfers thanomin (ETA)+diamine to by ammonia+diamine (AVT), the water chemistry running cost of secondary circuit still on floated 24%;
Before and after the conversion of table 1 Qinshan first phase secondary circuit water-chemical regime, monthly working cost contrasts (ten thousand yuan)
2) organic amine (as thanomin) inevitably can produce thermal decomposition product (organic acid), the hydrogen conductivity of condensed water precision processing system and steam generator blowdown system is not only caused to raise, the interference On-line monitor of Steam Condenser Leak and the blowdown of vapour generator; And organic acid existence also can make the regeneration efficiency of precision processing mixed bed drop to 80% of ethanolamine treatment from 100% of ammonia treatment, therefore need to consider that this affects when steam generator blowdown desalination and precision processing device of condensation water design.
3) the vapour-liquid partition ratio due to organic amine (as thanomin) is lower, and the overwhelming majority is still deposited in the middle of liquid phase, and this will certainly increase the weight of the operation burden of vapour generator (SG) drainage resin bed; Also may cause secondary coolant circuit system local ph (as condensate system) on the low side, and then make iron ion content in condensed water higher;
4) single organic amine is adopted also to there is the problem of contaminate environment aspect, it is reported, to adopt in waste water of its discharge of the nuclear power plant of organic amine nitrogen content in chemical oxygen demand (COD) and regeneration waste higher, and some organic amine is not only more stable, also there is certain biology toxicity, be difficult to it to be separated and removing by common Waste Water Treatment, considerably increase three-protection design cost.
Summary of the invention
The present invention is directed to the technology drawback that active service nuclear power station secondary loop uses single inorganic ammonia or organic amine to exist, provide a kind of NEW TYPE OF COMPOSITE basifier, this compound basifier by different for two kinds or more of vapour-liquid distribution factor reasonable coordination, thus avoid or reduce use single inorganic ammonia or organic amine and bring environmental pollution, increase the weight of that mixed bed runs that burden, running cost are high, the problem such as iron ion content in the too low condensed water brought of pH is higher.
For solving above-mentioned technical problem, the present invention by the following technical solutions:
A kind of NEW TYPE OF COMPOSITE basifier, compound basifier by two-pack or polycomponent volatile alkaline substance formulated, and the alkaline category-B material that when being at least greater than the alkaline category-A material of 1 and a kind of 150-300 DEG C containing vapour-liquid distribution factor during a kind of 150-300 DEG C, vapour-liquid distribution factor is less than 1, and compound basifier meets: when there is first time vapour-liquid distribution at 150-300 DEG C under condition, the ratio K of vapour phase alkali total mol concentration and liquid phase alkali total mol concentration is 1.0 ~ 1.5, when there is the distribution of second time vapour-liquid at 150-300 DEG C under condition, the ratio K of vapour phase alkali total mol concentration and liquid phase alkali total mol concentration is 0.5 ~ 1.0,
, wherein:
refer to A, B, the component C volumetric molar concentration in vapour phase μm ol/L in compound basifier, and
refer to A, B, component C volumetric molar concentration in the liquid phase μm ol/L in compound basifier.
Alkalescence category-A material can be ammonia, 3-METHOXY PROPYL AMINE (MPA), dimethylamine (DMA), tetramethyleneimine (PYRR) or morpholine (MPH).
Alkalescence category-B material mainly comprises: 2-amino-2-methyl tartronic acid amine (AMP), thanomin (ETA), 5-aminopentanol (5AP) or 4-amino butanol (4AB).
When there is first time vapour-liquid distribution at 150-300 DEG C under condition, the ratio K of vapour phase alkali total mol concentration and liquid phase alkali total mol concentration is 1.2.
This can make more basifier be assigned in main steam, and brings following benefit: while guarantee steam generator blowdown water pH, reduce the total consumption of basifier; Reduce steam generator blowdown water mixed bed burden; PH for secondary circuit follow-up system (as draining system, condensate system) controls to provide enough basifiers.
When there is the distribution of second time vapour-liquid at 150-300 DEG C under condition, the ratio K of vapour phase alkali total mol concentration and liquid phase alkali total mol concentration is 0.8.
This can make more basifier be assigned to hydrophobic in, and bring following benefit: while guarantee condensed water pH, reduce condensate polishing treatment mixed bed burden; Improve the pH value of draining system, be more conducive to the corrosion control of draining system; Reduce the total content of corrosion product in feedwater.
Foregoing compound basifier is regulating the application of nuclear power station secondary loop host system pH value.
The pH value regulating each position of nuclear power station secondary loop host system is 9.30 ~ 10.00 at 25 DEG C.During the application of NEW TYPE OF COMPOSITE basifier, the concentration of each component in each position NEW TYPE OF COMPOSITE basifier in secondary coolant circuit system need be controlled, and the feedwater of Real-Time Monitoring feedwater piping, steam generator blowdown water, main steam line main steam, condenser condensed water and draining system hydrophobic in NEW TYPE OF COMPOSITE basifier in the concentration of each component, guarantee that NEW TYPE OF COMPOSITE basifier is when vapour-liquid occurring and distributing, the ratio K of vapour phase alkali total mol concentration and liquid phase alkali total mol concentration is positioned at predetermined scope.
Compared with prior art, the invention has the beneficial effects as follows:
1) compound basifier of the present invention more effectively can control each position of nuclear power station secondary loop system and be in higher ph, effectively prevents each draining system of nuclear power station secondary loop and steam-hydrophobic two-phase flow system from occurring FAC;
2) compound basifier of the present invention can reduce the metal ion total concn such as iron ion in nuclear power station secondary loop feedwater further, reduces corrosion product to the migration of steam generator secondary side, deposition;
3) compound basifier of the present invention can reduce the operation burden of steam generator blowdown system and condensed water precision processing system mixed bed simultaneously, reduce the overall regeneration times of mixed-bed resin, overall acid and alkali consumption amount and total water consumption, alleviate operations staff's work load;
4) compound basifier of the present invention can reduce the disadvantageous effect of basifier degradation production to nuclear power secondary coolant circuit system, especially affects the hydrogen conductivity of condenser leakage monitoring and steam generator blowdown monitoring;
5) compound basifier of the present invention for independent employing organic amine, can reduce nuclear power station secondary loop working cost;
6) compound basifier of the present invention for independent employing organic amine, can reduce organic discharging of waste liquid, reduce the pollution to environment.
Embodiment
The present invention is further illustrated below.Embodiments of the present invention include but not limited to the following example.
Embodiment 1
NEW TYPE OF COMPOSITE alkalizing agent component forms: thanomin (ETA), ammonia (NH
3)
NEW TYPE OF COMPOSITE basifier initial mass concentration proportioning: [ETA]/[NH
3]=2:1;
Table 2 NEW TYPE OF COMPOSITE basifier is used for the monitor value of nuclear power station secondary loop
Example 2
NEW TYPE OF COMPOSITE alkalizing agent component forms: 5-aminopentanol (5-AP), dimethylamine (DMA)
NEW TYPE OF COMPOSITE basifier initial mass concentration proportioning: [5-AP]/[DMA]=1:1;
Table 3 NEW TYPE OF COMPOSITE basifier is used for the monitor value of nuclear power station secondary loop
Example 3
NEW TYPE OF COMPOSITE alkalizing agent component forms: thanomin (ETA), ammonia (NH
3), morpholine (MPH)
NEW TYPE OF COMPOSITE basifier initial mass concentration proportioning: [ETA]/[NH
3]/[MPH]=1:1:2;
Table 4 NEW TYPE OF COMPOSITE basifier is used for the monitor value of nuclear power station secondary loop
Be embodiments of the invention as mentioned above.The present invention is not limited to above-mentioned embodiment, and anyone should learn the structural changes made under enlightenment of the present invention, and every have identical or close technical scheme with the present invention, all falls within protection scope of the present invention.
Claims (7)
1. a NEW TYPE OF COMPOSITE basifier, it is characterized in that: compound basifier by two-pack or polycomponent volatile alkaline substance formulated, and the alkaline category-B material that when being at least greater than the alkaline category-A material of 1 and a kind of 150-300 DEG C containing vapour-liquid distribution factor during a kind of 150-300 DEG C, vapour-liquid distribution factor is less than 1, and compound basifier meets: when there is first time vapour-liquid distribution at 150-300 DEG C under condition, the ratio K of vapour phase alkali total mol concentration and liquid phase alkali total mol concentration is 1.0 ~ 1.5, when there is the distribution of second time vapour-liquid at 150-300 DEG C under condition, the ratio K of vapour phase alkali total mol concentration and liquid phase alkali total mol concentration is 0.5 ~ 1.0,
, wherein:
refer to A, B, the component C volumetric molar concentration in vapour phase μm ol/L in compound basifier, and
refer to A, B, component C volumetric molar concentration in the liquid phase μm ol/L in compound basifier.
2. compound basifier according to claim 1, is characterized in that: alkaline category-A material can be ammonia, 3-METHOXY PROPYL AMINE, dimethylamine, tetramethyleneimine or morpholine.
3. compound basifier according to claim 1, is characterized in that: alkaline category-B material can be: 2-amino-2-methyl tartronic acid amine, thanomin, 5-aminopentanol or 4-amino butanol.
4. compound basifier according to claim 1, is characterized in that: when there is first time vapour-liquid distribution at 150-300 DEG C under condition, the ratio K of vapour phase alkali total mol concentration and liquid phase alkali total mol concentration is 1.2.
5. compound basifier according to claim 1, is characterized in that: when there is the distribution of second time vapour-liquid at 150-300 DEG C under condition, the ratio K of vapour phase alkali total mol concentration and liquid phase alkali total mol concentration is 0.8.
6. the application of the compound basifier as described in any one of claim 1-5 in the pH value regulating each position of nuclear power station secondary loop host system.
7. application according to claim 6, is characterized in that: the pH value regulating each position of nuclear power station secondary loop host system is 9.30 ~ 10.00 at 25 DEG C.
Priority Applications (1)
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|---|---|---|---|
| CN201510999763.6A CN105417668B (en) | 2015-12-25 | 2015-12-25 | A kind of compound basifier and application thereof |
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|---|---|---|---|
| CN201510999763.6A CN105417668B (en) | 2015-12-25 | 2015-12-25 | A kind of compound basifier and application thereof |
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| CN105417668A true CN105417668A (en) | 2016-03-23 |
| CN105417668B CN105417668B (en) | 2017-10-13 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109827998A (en) * | 2019-03-12 | 2019-05-31 | 广东核电合营有限公司 | Measure the concentration of basifier and the method for pH value relationship |
| CN110436599A (en) * | 2019-07-09 | 2019-11-12 | 中国船舶重工集团公司第七一九研究所 | A kind of regulator for marine small-sized heap |
| CN111362388A (en) * | 2018-12-25 | 2020-07-03 | 中核核电运行管理有限公司 | Synergistic control method for ethanolamine and ammonia in two-loop thermodynamic system of nuclear power plant |
| CN113603200A (en) * | 2021-08-20 | 2021-11-05 | 山东上远环保科技有限公司 | Boiler water feed water ph regulator |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2196114C2 (en) * | 1999-03-02 | 2003-01-10 | Научно-производственная фирма "Инкорсервис" | Hydrogen sulfide neutralizer in water-crude oil emulsions |
| CN101045572A (en) * | 2006-03-31 | 2007-10-03 | 栗田工业株式会社 | Treatment method and device for water system of purified water boiler |
| CN102491480A (en) * | 2011-12-08 | 2012-06-13 | 上海德内克水处理设备有限公司 | Preparation method of steam recycling protecting agent |
| CN102557225A (en) * | 2010-12-28 | 2012-07-11 | 秦山核电有限公司 | Method for adjusting pH value of secondary circuit of nuclear power plant |
| CN103307902A (en) * | 2013-05-22 | 2013-09-18 | 西安热工研究院有限公司 | Method for inhibiting corrosion to direct air-cooled condenser of power plant during operation |
| CN104593780A (en) * | 2014-12-22 | 2015-05-06 | 蔡杰 | Regulator for water vapor thermodynamic cycle system and preparation method of regulator |
-
2015
- 2015-12-25 CN CN201510999763.6A patent/CN105417668B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2196114C2 (en) * | 1999-03-02 | 2003-01-10 | Научно-производственная фирма "Инкорсервис" | Hydrogen sulfide neutralizer in water-crude oil emulsions |
| CN101045572A (en) * | 2006-03-31 | 2007-10-03 | 栗田工业株式会社 | Treatment method and device for water system of purified water boiler |
| CN102557225A (en) * | 2010-12-28 | 2012-07-11 | 秦山核电有限公司 | Method for adjusting pH value of secondary circuit of nuclear power plant |
| CN102491480A (en) * | 2011-12-08 | 2012-06-13 | 上海德内克水处理设备有限公司 | Preparation method of steam recycling protecting agent |
| CN103307902A (en) * | 2013-05-22 | 2013-09-18 | 西安热工研究院有限公司 | Method for inhibiting corrosion to direct air-cooled condenser of power plant during operation |
| CN104593780A (en) * | 2014-12-22 | 2015-05-06 | 蔡杰 | Regulator for water vapor thermodynamic cycle system and preparation method of regulator |
Non-Patent Citations (3)
| Title |
|---|
| 左萌等: "核电二回路吗啉与乙醇胺加药工况的水化学影响研究", 《广东化工》 * |
| 方岚: "秦山三期重水堆核电站二回路水化学优化", 《核科学与工程》 * |
| 曹松彦等: "乙醇胺的热稳定性试验及其在核电站二回路系统的应用", 《腐蚀与防护》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111362388A (en) * | 2018-12-25 | 2020-07-03 | 中核核电运行管理有限公司 | Synergistic control method for ethanolamine and ammonia in two-loop thermodynamic system of nuclear power plant |
| CN109827998A (en) * | 2019-03-12 | 2019-05-31 | 广东核电合营有限公司 | Measure the concentration of basifier and the method for pH value relationship |
| CN110436599A (en) * | 2019-07-09 | 2019-11-12 | 中国船舶重工集团公司第七一九研究所 | A kind of regulator for marine small-sized heap |
| CN113603200A (en) * | 2021-08-20 | 2021-11-05 | 山东上远环保科技有限公司 | Boiler water feed water ph regulator |
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|---|---|
| CN105417668B (en) | 2017-10-13 |
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