CN100353160C - Chemicals feeding method of hydrazine analyzer - Google Patents
Chemicals feeding method of hydrazine analyzer Download PDFInfo
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- CN100353160C CN100353160C CNB2005100299118A CN200510029911A CN100353160C CN 100353160 C CN100353160 C CN 100353160C CN B2005100299118 A CNB2005100299118 A CN B2005100299118A CN 200510029911 A CN200510029911 A CN 200510029911A CN 100353160 C CN100353160 C CN 100353160C
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- hydrazine
- sodium chloride
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Abstract
The present invention relates to a detection method for solution concentration, particularly to a chemical feeding method of a hydrazine analyzer. Granular sodium chlorides are directly replaced by power sodium chlorides. The technical problems to be solved are that an electrode is always in an unsteady state that electrolytic solution is diluted and the sodium chlorides are dissolved; the contact areas of the granular sodium chlorides and the powder sodium chlorides, and the electrode are different. The present invention has the technical scheme that the chemical feeding method of a hydrazine analyzer comprises the following steps: a. solid filling materials which are not dissolved in water at all are filled at the periphery of the electrode, the solid filling materials do not act with sodium chloride solution; b. the powder sodium chlorides are added; c. the water is added in the hydrazine analyzer. The present invention is mainly used for controlling the amount of hydrazine for adding to a deaerator of a boiler.
Description
Technical field: the present invention relates to the detection method of solution concentration, particularly a kind of chemicals feeding method of hydrazine analyzer.
Background technology: the hydrazine analysis meter is the controlled condition that unit adds the hydrazine amount of liquid as the Power Plant online detection instrument.In boiler feed water treatment process process, deoxygenation is a very crucial link.Oxygen is the main corrosive substance of water supply system and boiler, and the oxygen in the feedwater should obtain rapidly removing.Add hydrazine liquid in the oxygen-eliminating device import, with oxygen-eliminating device import hydrazine value as controlled condition, prevent remaining dissolved oxygen DO in the oxygen-eliminating device water outlet, because it can corrode the water supply system and the parts of boiler, the corrosion product iron oxide can enter in the pot, and deposition or attached on boiler tube wall and the heating surface forms indissoluble and conducts heat the iron dirt bad, and corrosion can cause inner-walls of duct appearance point hole, the resistance coefficient increase.When corrosive pipeline is serious, even the pipeline explosion accident can take place.The dose that adds of hydrazine requires control strict, and it is very few to add dose, does not guarantee deaerating effect, thereby does not reach the purpose that prevents the economical operation of boiler corrosion guarantee power plant safety; And it is too much to add dose, not only causes unnecessary waste, but also can cause environmental pollution.The hydrazine analysis meter is as electrolytic solution with saturated nacl aqueous solution, utilize two platinum electrodes just forming/negative electrode, produce electric current by the voltage that provides, and this electric current is corresponding with the concentration of hydrazine in the sampling water, then can measure the concentration that adds hydrazine accurately.The electrolytic solution that the hydrazine analysis meter uses is the lysigenous naturally saturated solution of graininess sodium chloride medicament, and graininess sodium chloride must regularly add.
Yet the graininess sodium chloride that the hydrazine analysis meter uses never provided since 2000, reason is to can't buy on the market, had lacked the normal operation that these spare unit have a strong impact on the hydrazine analysis meter.
The hydrazine analyser is the important step that guarantees safe operation of power plant, and can't buy graininess sodium chloride on the market, and we have just expected coming substitute particles shape sodium chloride medicament with powdery sodium chloride.We use purity is powdery sodium chloride product as an alternative more than 99.5%, because it is the material as the configuration standard sodium chloride solution.
After determining reforming content, we have carried out concrete experimental demonstration: directly with experimentizing in the powdery sodium chloride adding reaction vessel, but find that the powdery sodium chloride dissolution velocity reaches the requirement of normal operating analysis too soon and not, medicament in the entire container has all dissolved in several hrs, can't accomplish to safeguard in one month requirement once, the measured value that obtains simultaneously also can't be stablized.All end in failure through repeatedly testing repeatedly on this basis.
Comprehensive above-mentioned situation determines that the direct substitute particles shape of simple powdery sodium chloride sodium chloride can't deal with problems, and according to experimental result failure cause is analyzed as follows:
1. electrode is in the non-steady state that electrolytic solution is diluted and sodium chloride is dissolved always.
2. graininess sodium chloride is different with the contact area of powdery sodium chloride and electrode.
Summary of the invention: the purpose of this invention is to provide a kind of chemicals feeding method of hydrazine analyzer, with the direct substitute particles shape of powdery sodium chloride sodium chloride, the technical issues that need to address are: 1. electrode is in the non-steady state that electrolytic solution is diluted and sodium chloride is dissolved always; 2. graininess sodium chloride is different with the contact area of powdery sodium chloride and electrode.
Technical scheme of the present invention is: a kind of chemicals feeding method of hydrazine analyzer may further comprise the steps: a, with fully water insoluble and be filled in around the electrode with the nullvalent solid filler of sodium chloride solution; B, add powder sodium chloride then; C, in hydrazine analyser container, add water.
Fill water when adding water in the container as far as possible and cover tight lid to reach the purpose that reduces inner air.Solid filler can be a kind of in spherical, that hexagon is above regular polygon, the ellipse, and when filling material when be spherical, diameter is 4-6mm, and interpolation quantity is the 50-70 grain.
The invention has the beneficial effects as follows: improved adding method thereof makes the hydrazine analysis meter recover original function, has solved the fast and measurement problem of unstable of sodium chloride dissolution velocity.The measured value of operations staff's regular sampling analysis result and hydrazine analysis meter compares, and measured value has obtained affirmation.Transform back hydrazine analysis meter through using, hydrazine dosing control stabilization has been guaranteed the safety of electric power factory equipment.Simultaneously at spare unit in price also with equally matched originally, consider this time to transform extremely successful from economic angle, avoided causing the more a series of expense of institute of exchange device enterprise expense because of no spare unit.The reliability height, stable performance, to saving medicine, the protection environment improves boiler stability and security, reduces labour intensity, and it is all significant to increase efficiency by downsizing payrolls etc., has produced good economic benefit and social benefit.
Embodiment: embodiment 1 adopts HYM-300/HYC-64 (S) the hydrazine analyser of Japanese DKK company.Improve at the problem that exists, concrete operation method is as follows:
1. with fully water insoluble and be filled in around the electrode, electrode and powdery sodium chloride are separated with the nullvalent solid filler of sodium chloride solution (having selected glass bead).
2. add again and go up powdery sodium chloride, prevent from like this to pile up powdery sodium chloride around the electrode.
3. fill water when in the entire reaction container, adding water as far as possible and cover tight lid to reach the purpose that reduces inner air.
Put into 65 of diameter 4mm glass beads, observe to find that through after a while the powdery sodium chloride that adds in the electrode inner chamber can use for 4 weeks, and the measured value of hydrazine analyser and setting value compare and be consistent often verification.
Embodiment 2, put into 60 of diameter 5mm glass beads, and all the other are identical with embodiment 1.
Embodiment 3, put into 55 of diameter 6mm glass beads, and all the other are identical with embodiment 1.
Comparative example 1 is put into 80 of the glass beads of diameter 5mm, finds through 2 months observations, per two week will be replenished new powdery sodium chloride, the dosing number of times is too frequent, can't reach the requirement of adding a medicine in one month, can not obtain saturated sodium chloride electrolyte.
Comparative example 2 is put into 40 of the glass beads of diameter 5mm, and through observing after a while, the sodium chloride powder is in dissolved state always, can't reach capacity, so electrode can't be in steady state (SS); The inside and outside infiltration capacity of electrode is big, so dissolving is fast.Oxygen-eliminating device import water hydrazine concentration value setting value at 27ppm, and measured value and this setting value of hydrazine analyser compared discovery, the measured value of hydrazine analyser can't be stabilized on the setting value.
Claims (4)
1, a kind of chemicals feeding method of hydrazine analyzer may further comprise the steps: a, with fully water insoluble and be filled in around the electrode with the nullvalent solid filler glass bead of sodium chloride solution; B, add powder sodium chloride then; C, in hydrazine analyser container, add water.
2, chemicals feeding method of hydrazine analyzer according to claim 1 is characterized in that: need fill water when adding water in the container and cover tight lid.
3, chemicals feeding method of hydrazine analyzer according to claim 1 is characterized in that: solid filler can be a kind of in spherical, that hexagon is above regular polygon, the ellipse.
4, according to claim 1 or 3 described chemicals feeding method of hydrazine analyzer, it is characterized in that: when filling material was sphere, diameter was 4-6mm, and adding quantity is the 50-70 grain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100299118A CN100353160C (en) | 2005-09-22 | 2005-09-22 | Chemicals feeding method of hydrazine analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100299118A CN100353160C (en) | 2005-09-22 | 2005-09-22 | Chemicals feeding method of hydrazine analyzer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1793886A CN1793886A (en) | 2006-06-28 |
| CN100353160C true CN100353160C (en) | 2007-12-05 |
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| CNB2005100299118A Expired - Fee Related CN100353160C (en) | 2005-09-22 | 2005-09-22 | Chemicals feeding method of hydrazine analyzer |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4670157A (en) * | 1984-02-15 | 1987-06-02 | The Phoenix Project Partnership | Process for clarifying bicarbonate bearing water using measurement and control of carbon dioxide content |
| CN1062198A (en) * | 1990-12-07 | 1992-06-24 | 陈雅华 | Automatic drug feeding device for boiler water feed and oxygen isolation method |
| JPH0741966A (en) * | 1993-07-28 | 1995-02-10 | Otsuka Chem Co Ltd | Corrosion inhibitor for boiler water system |
| CN2270725Y (en) * | 1995-09-28 | 1997-12-17 | 武汉水利电力大学 | Sponge iron particle filtering deaerator |
| CN2340771Y (en) * | 1998-07-22 | 1999-09-29 | 张和梅 | Filtering apparatus for anti-scaling of boiler |
| JP2003231980A (en) * | 2002-02-12 | 2003-08-19 | Kurita Water Ind Ltd | Corrosion inhibitor for boiler |
-
2005
- 2005-09-22 CN CNB2005100299118A patent/CN100353160C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4670157A (en) * | 1984-02-15 | 1987-06-02 | The Phoenix Project Partnership | Process for clarifying bicarbonate bearing water using measurement and control of carbon dioxide content |
| CN1062198A (en) * | 1990-12-07 | 1992-06-24 | 陈雅华 | Automatic drug feeding device for boiler water feed and oxygen isolation method |
| JPH0741966A (en) * | 1993-07-28 | 1995-02-10 | Otsuka Chem Co Ltd | Corrosion inhibitor for boiler water system |
| CN2270725Y (en) * | 1995-09-28 | 1997-12-17 | 武汉水利电力大学 | Sponge iron particle filtering deaerator |
| CN2340771Y (en) * | 1998-07-22 | 1999-09-29 | 张和梅 | Filtering apparatus for anti-scaling of boiler |
| JP2003231980A (en) * | 2002-02-12 | 2003-08-19 | Kurita Water Ind Ltd | Corrosion inhibitor for boiler |
Non-Patent Citations (4)
| Title |
|---|
| 国产LA-Ι型在线联氨分析仪的研制 水电部西安热工研究所.热力发电，第3期 1985 * |
| 水中痕量联氨分析仪 喻建沅，杨梅英，周慧民，夏振雷，余瑞宝.分析仪器，第2期 1991 * |
| 火电厂给水加药系统的发展方向探讨 孙虎全.山西火力，第105期 2002 * |
| 锅炉给水除氧技术新进展 黄进，钟诚，王栋.化学工程师，第8期 2004 * |
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| CN1793886A (en) | 2006-06-28 |
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Granted publication date: 20071205 Termination date: 20190922 |