CN102607919B - Biomass combustion smoke corrosion analog system, preparation method thereof and application - Google Patents
Biomass combustion smoke corrosion analog system, preparation method thereof and application Download PDFInfo
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- CN102607919B CN102607919B CN201210078505.0A CN201210078505A CN102607919B CN 102607919 B CN102607919 B CN 102607919B CN 201210078505 A CN201210078505 A CN 201210078505A CN 102607919 B CN102607919 B CN 102607919B
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Abstract
The invention relates to a biomass combustion smoke corrosion analog system, a preparation method thereof and application. Chlorine ion solution with chlorine ion concentration ranging from 0.1wt% to 5wt% is prepared; the pH (potential of hydrogen) value of the chlorine ion solution is adjusted to 2.0-4.0 by acid to form acid corrosion liquid; and carbon dioxide gas continuously flows into the acid corrosion liquid to form a biomass combustion smoke corrosion analog environment, and the analog system is used for performing corrosion resistance detection. The corrosion liquid is prepared according to different corrosion ingredients in different types of biomass smoke, the carbon dioxide flows into the acid corrosion liquid to increase acidity, corrosion of the analog system is close to actual corrosion, and a simple and convenient way for studying biomass combustion smoke treatment is provided.
Description
Technical field
The present invention relates to a kind of biomass combustion flue gas corrosion simulated system and its preparation method and application, belong to new energy use technology field.
Background technology
Fast development along with China's economy, demand to the energy is increasing, and coal, oil, the reserves of the traditional energies such as rock gas are day by day exhausted, the exploitation of new and renewable sources of energy is more and more come into one's own, utilization as the biomass energy of regenerative resource important component part also obtained development fast, but because China starts late to the research of biomass energy, the commercialization of biomass energy is used also to the just thing of recent years, especially aspect Generation Utilizing Biological Energy Sources, still exist many problems that need exploration and research, owing to lacking perfect theoretical foundation and enough experience accumulation, make Electric Design unit run into certain difficulty aspect the design and equipment type selecting of biomass power plant.Flue gas corrosion for biomass power plant is analyzed, found after biomass fuel combustion that current biomass power generation adopts that ash content is alkaline, but flue gas is acid, and be rich in chlorion, its unique corrosive property had both been different from the only marine corrosion of chloride ion-containing, be different from again and take sulfate radical and be the sour corrosion of main coal-burning power plant, therefore how can study better the corrosive property of this flue gas, so that for to take more effective anti-corrosion measure to become an important problem.
Summary of the invention
The object of the invention is the composition for current biomass flue gas, a kind of biomass combustion flue gas corrosion simulated system and its preparation method and application is provided, the situation of this kind of system and the actual corrosion of biomass combustion flue gas approaches, for erosion-resisting research provides important approach.
The technical scheme that the present invention takes is:
A preparation method for biomass combustion flue gas corrosion simulated system, comprises that step is as follows:
(1) prepare Chloride Solution, with solubility villaumite, be mixed with the chloro ion-containing solution of chlorine ion concentration 0.1-5wt%;
(2) by chloro ion-containing solution with acid for adjusting pH value to 2.0-4.0, form acid etching solution;
(3) in oxytropism corrosive liquid, constantly pass into carbon dioxide insulation or obstructed carbon dioxide and be directly incubated the simulated environment that forms biomass combustion flue gas corrosion.
Described solubility villaumite is selected from one or both in NaCl, KCl.
Described acid is preferably used with acetic acid or sulfuric acid or two kinds simultaneously.
Described sulfuric acid is dilute sulfuric acid.
The temperature of described simulated system is at 0-100 ℃, preferably between room temperature to 70 ℃.
Described carbon dioxide is that in every liter of acid etching solution, intake is controlled at 0.1-2 Liter Per Minute, guarantees carbonate concentration in the solution state that reaches capacity.
When simulation, take the stalks such as straw, cotton stalk, cornstalk while being main biomass combustion, regulate the preferred acetic acid of pH value.
When simulation, take the wooden classes such as timber, wood chip while being main biomass combustion, in chloro ion-containing solution, chlorine ion concentration is preferably 0.1-1wt%, regulates pH value preferably sulfuric acid.
Biomass combustion flue gas corrosion simulated system prepared by said method.
The application of described biomass combustion flue gas corrosion simulated system in corrosion resistivity detects, the particularly application in immersion corrosion test, electrochemical corrosion experimental or salt air corrosion experiment.
Beneficial effect of the present invention is:
Different according to the corrosivity composition in different biomass flue gas, preparation corrosive liquid, employing passes into carbon dioxide increases acidity, and the corrosion of simulated system approaches with the situation of actual corrosion.Analysis and research show take that straw, cotton stalk, the cornstalk flue gas after burning in main living beings contains higher chlorion, the flue gas of the wood type living beings such as pine, poplar bits after main biomass combustion of take contains more sulphuric dioxide, when simulation be take the stalks such as straw, cotton stalk, cornstalk while being main biomass combustion, regulate pH value to select the more approaching reality of acetic acid, when simulation, take the wooden classes such as timber, wood chip while being main biomass combustion, regulate pH to select the more approaching reality of sulfuric acid.With above-mentioned corrosion simulation liquid, coordinate methods of corrosion determination can carry out comprehensively to judge the material corrosion stability problem for some biomass power generation associate devices, the research of processing for biomass combustion flue gas provides simple pathway.
Embodiment
Below in conjunction with embodiment, further illustrate the present invention.
Embodiment 1
A preparation method for biomass combustion flue gas corrosion simulated system, comprises that step is as follows:
(1) prepare chloro ion-containing solution, with sodium chloride, water, be mixed with the chloro ion-containing solution of chlorine ion concentration 5wt%;
(2) by vinegar acid for adjusting pH value to 3.0 for chloro ion-containing solution, form acid etching solution;
(3) in oxytropism corrosive liquid, constantly pass into carbon dioxide, the carbonate concentration state that reaches capacity in solution that guarantees forms the simulated environment (room temperature) of biomass combustion flue gas corrosion.
Prepared biomass combustion flue gas corrosion simulated system is used in to immersion corrosion test, electrochemical corrosion experimental or salt air corrosion experiment, and (immersion corrosion belongs to material and is soaked in the situation in corrosive medium completely, but some designs in practice can be avoided the design at this similar dead angle, avoid saving bit by bit for a long time of corrosive liquid; The corrosion potential of material in this feature corrosive medium reacted in galvanic corrosion, i.e. anti-corrosion tendency, and corrosion potential is more low more not anti-corrosion; And salt mist experiment is corresponding with immersion test, reacted characteristic when corrosive medium corrodes with gas form) etc. during corrosion resistivity detects.
Embodiment 2
A preparation method for biomass combustion flue gas corrosion simulated system, comprises that step is as follows:
(1) prepare chloro ion-containing solution, with sodium chloride, be mixed with the chloro ion-containing solution of chlorine ion concentration 1wt%;
(2) by sulphur acid for adjusting pH value to 3.0 for chloro ion-containing solution, form acid etching solution;
(3) in oxytropism corrosive liquid, constantly pass into carbon dioxide and guarantee carbonate concentration in the solution state that reaches capacity, be heated to 50 ℃ of simulated environments that form biomass combustion flue gas corrosions.
Prepared biomass combustion flue gas corrosion simulated system is used in the corrosion resistivity detections such as immersion corrosion test, electrochemical corrosion experimental or salt air corrosion experiment.
Embodiment 3
A preparation method for biomass combustion flue gas corrosion simulated system, comprises that step is as follows:
(1) prepare chloro ion-containing solution, with potassium chloride, be mixed with the chloro ion-containing solution of chlorine ion concentration 1wt%;
(2) by vinegar acid for adjusting pH value to 4.0 for chloro ion-containing solution, form acid etching solution (room temperature);
Prepared biomass combustion flue gas corrosion simulated system is used in the corrosion resistivity detections such as electrochemical corrosion experimental or salt air corrosion experiment.
Embodiment 4
A preparation method for biomass combustion flue gas corrosion simulated system, comprises that step is as follows:
(1) prepare chloro ion-containing solution, with potassium chloride, be mixed with the chloro ion-containing solution of chlorine ion concentration 0.1wt%;
(2) by sulphur acid for adjusting pH value to 4.0 for chloro ion-containing solution, form acid etching solution (room temperature);
Prepared biomass combustion flue gas corrosion simulated system is used in the corrosion resistivity detections such as electrochemical corrosion experimental or salt air corrosion experiment.
Embodiment 5
A preparation method for biomass combustion flue gas corrosion simulated system, comprises that step is as follows:
(1) prepare chloro ion-containing solution, with potassium chloride, be mixed with the chloro ion-containing solution of chlorine ion concentration 0.1wt%;
(2) by vinegar acid for adjusting pH value to 4.0 for chloro ion-containing solution, form acid etching solution (being incubated 35 ℃);
Prepared biomass combustion flue gas corrosion simulated system is used in the corrosion resistivity detections such as electrochemical corrosion experimental or salt air corrosion experiment.
As a comparison, configure the solution of chloride ion-containing only and the acid etching solution of chloride ion-containing not:
Comparative example 1: prepare chloro ion-containing solution, be mixed with the chloro ion-containing solution (room temperature) of chlorine ion concentration 1wt% with potassium chloride;
Comparative example 2: by vinegar acid for adjusting pH value to 4.0 for the water of chloride ion-containing not, form pure acid etching solution (room temperature).
Performance test:
Same a plurality of material samples are placed on respectively in the biomass combustion flue gas corrosion simulated system of embodiment 1-5, in the biomass combustion flue gas corrosion simulated system of comparative example, in actual biomass combustion flue gas environment, carry out immersion corrosion test, electrochemical corrosion experimental or salt air corrosion experiment.See that Corrosion results is as follows:
Claims (7)
1. a preparation method for biomass combustion flue gas corrosion simulated system, is characterized in that, comprises that step is as follows:
(1) prepare Chloride Solution, with solubility villaumite, be mixed with the chloro ion-containing solution of chlorine ion concentration 0.1-5wt%;
(2) by chloro ion-containing solution with acid for adjusting pH value to 2.0-4.0, form acid etching solution, when simulation, take stalk while being main biomass combustion, regulate pH value acetic acid; When simulation, take wooden class while being main biomass combustion, regulate pH value sulfuric acid;
(3) in oxytropism corrosive liquid, constantly pass into carbon dioxide insulation or obstructed carbon dioxide and be directly incubated the simulated environment that forms biomass combustion flue gas corrosion.
2. the preparation method of biomass combustion flue gas corrosion simulated system according to claim 1, is characterized in that, described solubility villaumite is selected from one or both in NaCl, KCl.
3. the preparation method of biomass combustion flue gas corrosion simulated system according to claim 1, is characterized in that, the temperature of described simulated environment is at 0-100 ℃.
4. the preparation method of biomass combustion flue gas corrosion simulated system according to claim 1, it is characterized in that, while passing into carbon dioxide in oxytropism corrosive liquid, the amount of carbon dioxide passing in every liter of acid etching solution is controlled at (0.1-2) L/min, guarantees carbonate concentration in the solution state that reaches capacity.
5. the preparation method of biomass combustion flue gas corrosion simulated system according to claim 1, is characterized in that, when simulation, take wooden class while being main biomass combustion, and in chloro ion-containing solution, chlorine ion concentration is 0.1-1wt%.
6. the biomass combustion flue gas corrosion simulated system that prepared by the method described in claim 1-5 any one.
7. the application of biomass combustion flue gas corrosion simulated system claimed in claim 6 in corrosion resistivity detects.
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| DE102007053735B4 (en) * | 2007-11-07 | 2009-08-27 | Salzgitter Mannesmann Grobblech Gmbh | Method for the accelerated performance of corrosion tests on steel materials |
| KR101088206B1 (en) * | 2010-02-24 | 2011-11-30 | 성균관대학교산학협력단 | Corrosion estimation method of bottom plate of oil storage tank using settling water and sludge |
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