CN103060818A - Full-automatic control-corrosion system and application method of solar-energy hot-water storage tank - Google Patents
Full-automatic control-corrosion system and application method of solar-energy hot-water storage tank Download PDFInfo
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- CN103060818A CN103060818A CN2012105675714A CN201210567571A CN103060818A CN 103060818 A CN103060818 A CN 103060818A CN 2012105675714 A CN2012105675714 A CN 2012105675714A CN 201210567571 A CN201210567571 A CN 201210567571A CN 103060818 A CN103060818 A CN 103060818A
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Abstract
The invention relates to the technical field of metal corrosion resistance, in particular to a full-automatic control-corrosion system and an application method of a solar-energy hot-water storage tank. The system comprises a current-producing assembly (1), auxiliary anodes (8) and cables (10), wherein a cathode tank electric connecting terminal (9) is installed on the outer wall of a hot-water tank (3), the auxiliary anodes (8) are installed on the inner wall of the hot-water tank (3), the cathode tank electric connecting terminal (9) and the auxiliary anodes (8) are respectively in electric connection with the current-producing assembly (1). An integral control circuit (2) is installed on one side of the current-producing assembly (1) and the integral control circuit (2) is in electric connection with the current-producing assembly (1). A liquid level sensor (4) and a temperature sensor (7) are installed on the inner wall of the hot-water tank (3) and the liquid level sensor (4) and the temperature sensor (7) are in electric connection with the integral control circuit (2). The full-automatic control-corrosion system and the application method of the solar-energy hot-water storage tank are simple in structure, convenient to use, low in cost, and convenient to control. The full-automatic control-corrosion system and the application method of the solar-energy hot-water storage tank can adjust output current automatically according to corrosive medium temperature and the liquid level in the hot-water tank so that the hot-water tank is in a protection state at any time.
Description
Technical field
The present invention relates to the anti-corrosion of metal technical field, particularly a kind of solar heat water storage tank full-automatic corrosion control system and using method thereof.
Background technology
A large amount of single cover solar energy collectors is combined, form a large-scale solar water heating system, for hotel, hospital, school, hotel, high-grade residential quarter etc. provide collective's hot-water supply.Low temperature tap water or underground water that the solar heat water storage tank is used for storage heat collector hot water out and replenishes are important component parts of this system.Although corrosion of steel structure is lighter in the conventional fresh water environment, reach 80～90 ℃ during tank water medium high temperature, low temperature is 0～10 ℃ during upper water, and long-term high and low temperature alternative has accelerated the corrosion of tank body in the tank; The saltiness that adds underground water is high, and corrodibility is strong, and the tank skin corrosion failure happens occasionally.
Hot water storage tank's corrosion protection technology comprises sacrificial anode and impressed current method.Because medium temperature is high in the tank, conventional aluminum anode and magnesium anode consumption are fast, and guard time is short, especially for tens tons large-scale storage tank, need a large amount of sacrificial anodes is installed, and construction costs is high.In addition, long-term drinking contains the aluminum ions water capacity and easily causes senile dementia; And investigation finds to use the magnesium anode lysate to be cotton-shaped, easily stops up lotus spray-head, in certain areas, contains a large amount of SO42-, S2-in the water, and the metals such as these ions and magnesium react, and forms H2S gas, produces rotten-egg odour.Impressed current method can be divided into potentiostatic method and galvanostatic method.Potentiostatic method needs a stable electrode as reference; by applying certain protective current; make the steel construction of reservoir walls be polarised to the protection potential interval, still up to the present find the stable reference electrode of current potential that can in this hot environment, use for a long time.Galvanostatic method is by certain protective current being provided to tank body, making it be polarised to the protection potential interval, and gordian technique is at first to determine the size of protective current.
Summary of the invention
For solving the problems of the technologies described above, the object of the present invention is to provide a kind of simple in structure, easy to use, cost is low, control is convenient, can be according to the temperature of hot water storage tank's internal corrosion medium and solar heat water storage tank full-automatic corrosion control system and the using method thereof of the automatic regulation output electric current of liquid level.
To achieve these goals, the invention provides the full-automatic corrosion control of a kind of solar heat water storage tank system, it comprises generation electric current assembly 1, supplementary anode 8 and cable 10, wherein, this hot water storage tank's 3 outer wall is provided with negative electrode tank body electric connection terminal 9, hot water storage tank 3 inwall is provided with supplementary anode 8, and negative electrode tank body electric connection terminal 9 and supplementary anode 8 are electrically connected with generation electric current assembly 1 respectively; One side of described generation electric current assembly 1 is provided with the integral control circuit 2 that is electrically connected with it; Described hot water storage tank's inwall also is provided with liquid surface height sensor 4 and the temperature sensor 7 that is electrically connected with integral control circuit 2.
Described supplementary anode 8 numbers are two, a middle and upper part that is fixedly installed on hot water storage tank's 3 inwalls, a middle and lower part that is fixedly installed on hot water storage tank's 3 inwalls, two supplementary anode 8 subtend settings.
Described negative electrode tank body electric connection terminal 9 is electrically connected by cable 10 with the negative pole of described generation electric current assembly 1; Described supplementary anode 8 is electrically connected with the positive pole that electric current assembly 1 occurs by cable 10.
Described liquid surface height sensor 4 is positioned at the top of hot water storage tank 3 water outlet 5, and the number of liquid surface height sensor 4 is a plurality of, the inwall that is fixedly mounted on hot water storage tank 3 that a plurality of liquid surface height sensor 4 is equidistant.
Described temperature sensor 7 is positioned at the top of hot water storage tank 3 water-in 6, is fixedly mounted on the top of the supplementary anode 8 of hot water storage tank 3 inwall middle and lower parts.
Purpose to better implement the present invention, the present invention provides again the using method of the full-automatic corrosion control of a kind of solar heat water storage tank system, wherein, comprises the steps:
A. hot water storage tank 3 stores the medium of certain temperature, connects external power, opens electric current assembly 1 and integral control circuit 2 occur;
C. liquid surface height sensor 4 automatic induction medium liquid levels, when testing different liquid level, the total area of hot water storage tank's 3 inwalls and medium contact;
D. two groups of test result signals with gained in b and the c step pass to integral control circuit 2;
E. integral control circuit 2 is converted into protective current automatically according to medium liquid level and medium temperature, it is fed back to electric current assembly generation electric current assembly 1 occurs;
F., electric current assembly 1 occurs apply a certain electric current according to instruction between negative electrode tank body electric connection terminal 9 and supplementary anode 8.
Wherein, among the step b: the required protective current density of test hot water storage tank (3) unit surface under the differing temps in storage media, temperature and unit surface protective current Approximate Equivalent funtcional relationship are: I
t=a
1+ b
1T, 0≤t≤85 ℃; Wherein,
T is the temperature of water in the tank, and unit is ℃;
a
1Be constant, a
1The required protective current density of unit materials when size equals t and is zero degrees celsius;
b
1Be rate constant, the temperature variant relation of reflection protective current density;
I
tFor being issued in differing temps, unit surface storage tank shell metallic substance protects needed electric current fully, unit: mA/cm
2
Among the step c, when testing different liquid level, the total area of hot water storage tank's (3) inwall and medium contact; Liquid level and gross contact area Approximate Equivalent funtcional relationship are: S
h=a
2+ b
2H, 0≤h; Wherein,
H is liquid level, and unit is cm;
a
2Be constant, a
2Storage tank bottom area when size equals h and is zero;
b
2Be rate constant, the long-pending variation relation with liquid level of reflection reservoir walls and water engaging surface;
S
hBe the total area of the reservoir walls under the different liquid levels and medium contact, unit is cm
2
Among the step e, integral control electric current reduction formula is:
I
p=I
t×S
h=(a
1+b
1t)×(S
h＝a
2+b
2h)
I wherein
pFor reaching, reservoir walls under the different liquid levels of differing temps protects required protective current fully.
Advantage of the present invention is: simple in structure, easy to use, cost is low, and control is convenient, can according to temperature and the automatic regulation output electric current of liquid level of hot water storage tank's internal corrosion medium, make reservoir walls be in the general corrosion state of a control always.
Description of drawings
Fig. 1 is the installment state schematic diagram of full-automatic corrosion control of the present invention system.
[primary clustering nomenclature]
1 the electric current assembly occurs
2 integral control circuits
3 hot water storage tanks
4 liquid surface height sensors
5 water outlets
6 water-ins
7 temperature sensors
8 supplementary anodes
9 negative electrode tank body electric connection terminals
10 cables
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further.
The full-automatic corrosion control of solar heat water storage tank of the present invention system comprises electric current assembly 1, supplementary anode 8 and cable 10 occurs, wherein, hot water storage tank 3 outer wall is provided with negative electrode tank body electric connection terminal 9, hot water storage tank 3 inwall is provided with supplementary anode 8, and negative electrode tank body electric connection terminal 9 is electrically connected by cable 10 with the negative pole that electric current assembly 1 occurs; Supplementary anode 8 is electrically connected with the positive pole that electric current assembly 1 occurs by cable 10; One side of described generation electric current assembly 1 further is provided with integral control circuit 2, electric current assembly 1 occurs be electrically connected by cable 10 with integral control circuit 2.
In the present embodiment, described supplementary anode 8 numbers are two, a middle and upper part that is fixedly installed on hot water storage tank's 3 inwalls, a middle and lower part that is fixedly installed on hot water storage tank's 3 inwalls, two supplementary anode 8 subtend settings.
Described hot water storage tank's inwall also is provided with liquid surface height sensor 4 and temperature sensor 7, wherein, liquid surface height sensor 4 is positioned at the top of hot water storage tank 3 water outlet 5, the number of liquid surface height sensor 4 is a plurality of, be electrically connected by cable 10 between the inwall that is fixedly mounted on hot water storage tank 3 that a plurality of liquid surface height sensor 4 is equidistant, a plurality of liquid surface height sensors 4 and integral control circuit 2; Temperature sensor 7 is positioned at the top of hot water storage tank 3 water-in 6, is fixedly mounted on the top of the supplementary anode 8 of hot water storage tank 3 inwall middle and lower parts, is electrically connected by cable 10 between temperature sensor 7 and the integral control circuit 2.
Wherein, described generation electric current assembly 1 is that 220V family expenses alternating-current vertoro is converted to low-voltage DC and can regulates outward current.The input terminus that electric current assembly 1 occurs is family expenses 220V alternating-current (also can adopt in case of necessity low-voltage dc power supply to substitute), output cathode meets supplementary anode 8(and is generally metal oxide anode, in order to make the tank body distribution of current even, can a plurality of supplementary anodes be installed simultaneously in tank interior), negative pole cans picking body.
Described integral control circuit 2 is mainly used in the elimination of waveform transformation, amplifying circuit offset voltage and the occasions such as integral compensation in the feedback control.
The principle of work of the full-automatic corrosion control of solar heat water storage tank of the present invention system is: the laboratory build-in test also determines that the storage tank steel (also may other water sources at the tap water of storage, be assumed to tap water among the application) in the required protective current density of unit surface under the differing temps, temperature is become a funtcional relationship with unit surface protective current Approximate Equivalent; The total area that reservoir walls contacts with tap water when calculating different liquid level, this liquid level and water receiving area also can be approximately a funtcional relationship.With above-mentioned two approximate function formulas programming and store in the integral control circuit 2, so far only need know medium temperature and liquid level in the tank, integral control circuit 2 will calculate required protective current automatically according to water temperature and liquid level, feeds back to simultaneously electric current assembly 1 occurs; Be specially:
Temperature and liquid level biography position sensor pass to integral control circuit with temperature and the liquid level parameter of tap water in the storage tank; integral control circuit calculates the protective current signal that need to apply by the internal logic computing; and this signal passed to the electric current assembly occurs, the electric current assembly occurs to be applied certain protective current by supplementary anode to tank body and makes it be polarised to the protection potential interval.
Therefore, the using method of the full-automatic corrosion control of solar heat water storage tank of the present invention system comprises the steps:
A. hot water storage tank 3 stores the medium of certain temperature, connects external power, opens electric current assembly 1 and integral control circuit 2 occur;
C. liquid surface height sensor 4 automatic induction medium liquid levels, when testing different liquid level, the total area of hot water storage tank's 3 inwalls and medium contact;
D. two groups of test result signals with gained in b and the c step pass to integral control circuit 2;
E. integral control circuit 2 is converted into protective current automatically according to medium liquid level and medium temperature, it is fed back to electric current assembly generation electric current assembly 1 occurs;
F., electric current assembly 1 occurs apply a certain electric current according to instruction between negative electrode tank body electric connection terminal 9 and supplementary anode 8.
Among the above-mentioned steps b: the hot water storage tank is the required protective current density of unit surface under the differing temps in the tap water of storage, and temperature is become a funtcional relationship with unit surface protective current Approximate Equivalent, and concrete function is: I
t=a
1+ b
1T, 0≤t≤85 ℃.
Wherein, I
tProtect needed electric current fully for unit surface storage tank shell metallic substance is issued in differing temps, unit is: mA/cm
2.
a
1And b
1Be constant, a
1The required protective current density of unit materials when size equals t and is zero.b
1Be rate constant, reflection protective current density varies with temperature relation.T is the temperature of water in the tank, and unit is ℃.
Among the step c, calculate under the different liquid levels reservoir walls and water engaging surface long-pending, this liquid level and gross contact area Approximate Equivalent are a funtcional relationship, and specifically function is: S
h=a
2+ b
2H, 0≤h.
Wherein, S
hLong-pending for the reservoir walls under the different liquid levels and water engaging surface, unit is cm
2,
a
2And b
2Be constant, a
2Storage tank bottom area when size equals h and is zero.b
2Be rate constant, the long-pending variation relation with liquid level of reflection reservoir walls and water engaging surface.H is liquid level, and unit is cm.
Among the step e, integral control electric current reduction formula is: I
p=I
t* S
h=(a
1+ b
1T) * (S
h=a
2+ b
2H)
I wherein
pFor reaching, reservoir walls under the different liquid levels of differing temps protects required protective current fully.
During the work of the full-automatic corrosion control of solar heat water storage tank of the present invention system: at first; connect external power; open electric current assembly 1 and integral control circuit 2 occur; hot water storage tank 3 stores the medium of certain temperature; temperature sensor 7 and liquid surface height sensor 4 be induction water temperature and liquid level automatically; and signal instruction passed to integral control circuit 2; feed back signal to after integral control circuit 2 converts electric current assembly 1 occurs; electric current assembly 1 occurs apply a certain electric current according to instruction at negative electrode tank body electric connection terminal 9 and supplementary anode 8; make hot water storage tank's tank body potential polarization interval to protection potential, reach corrosion control effect.
Claims (9)
1. the full-automatic corrosion control of solar heat water storage tank system, it comprises electric current assembly (1), supplementary anode (8) and cable (10) occurs, and it is characterized in that:
This hot water storage tank's (3) outer wall is provided with negative electrode tank body electric connection terminal (9), hot water storage tank's (3) inwall is provided with supplementary anode (8), and negative electrode tank body electric connection terminal (9) and supplementary anode (8) are electrically connected with generation electric current assembly (1) respectively; One side of described generation electric current assembly (1) is provided with the integral control circuit (2) that is electrically connected with it; Described hot water storage tank's inwall also is provided with liquid surface height sensor (4) and the temperature sensor (7) that is electrically connected with integral control circuit (2).
2. the full-automatic corrosion control of solar heat water storage tank system as claimed in claim 1, it is characterized in that: described supplementary anode (8) number is two, a middle and upper part that is fixedly installed on hot water storage tank (3) inwall, a middle and lower part that is fixedly installed on hot water storage tank (3) inwall, two supplementary anodes (8) subtend setting.
3. the full-automatic corrosion control of solar heat water storage tank system as claimed in claim 1, it is characterized in that: described negative electrode tank body electric connection terminal (9) is electrically connected by cable (10) with the negative pole of described generation electric current assembly (1); Described supplementary anode (8) is electrically connected with the positive pole that electric current assembly (1) occurs by cable (10).
4. the full-automatic corrosion control of solar heat water storage tank system as claimed in claim 1, it is characterized in that: described liquid surface height sensor (4) is positioned at the top of the water outlet (5) of hot water storage tank (3), the number of liquid surface height sensor (4) is a plurality of, the inwall that is fixedly mounted on hot water storage tank (3) that a plurality of liquid surface height sensors (4) are equidistant.
5. the full-automatic corrosion control of solar heat water storage tank system as claimed in claim 1, it is characterized in that: described temperature sensor (7) is positioned at the top of the water-in (6) of hot water storage tank (3), is fixedly mounted on the top of the supplementary anode (8) of hot water storage tank (3) inwall middle and lower part.
6. the using method of the full-automatic corrosion control of a solar heat water storage tank system is characterized in that, comprises the steps:
A. hot water storage tank (3) stores the medium of certain temperature, connects external power, opens electric current assembly (1) and integral control circuit (2) occur;
B. the automatic induction medium temperature of temperature sensor (7) is with the protective current density of test hot water storage tank (3) in the medium temperature under the differing temps;
C. the automatic induction medium liquid level of liquid surface height sensor (4), when testing different liquid level, the total area of hot water storage tank's (3) inwall and medium contact;
D. two groups of test result signals with gained in b and the c step pass to integral control circuit (2);
E. integral control circuit (2) is converted into protective current automatically according to medium liquid level and medium temperature, it is fed back to electric current assembly generation electric current assembly (1) occurs;
F., electric current assembly (1) occurs apply a certain electric current according to instruction between negative electrode tank body electric connection terminal (9) and supplementary anode (8).
7. the using method of the full-automatic corrosion control of solar heat water storage tank system as claimed in claim 6 is characterized in that:
Among the step b: the required protective current density of test hot water storage tank (3) unit surface under the differing temps in storage media, temperature and unit surface protective current Approximate Equivalent funtcional relationship are: I
t=a
1+ b
1T, 0≤t≤85 ℃; Wherein,
T is the temperature of water in the tank, and unit is ℃;
a
1Be constant, a
1The required protective current density of unit materials when size equals t and is zero degrees celsius;
b
1Be rate constant, the temperature variant relation of reflection protective current density;
I
tFor being issued in differing temps, unit surface storage tank shell metallic substance protects needed electric current fully, unit: mA/cm
2
8. the using method of the full-automatic corrosion control of described solar heat water storage tank system according to claim 6 is characterized in that:
Among the step c, when testing different liquid level, the total area of hot water storage tank's (3) inwall and medium contact; Liquid level and gross contact area Approximate Equivalent funtcional relationship are: S
h=a
2+ b
2H, 0≤h; Wherein,
H is liquid level, and unit is cm;
a
2Be constant, a
2Storage tank bottom area when size equals h and is zero;
b
2Be rate constant, the long-pending variation relation with liquid level of reflection reservoir walls and water engaging surface;
S
hBe the total area of the reservoir walls under the different liquid levels and medium contact, unit is cm
2
9. the using method of the full-automatic corrosion control of described solar heat water storage tank system according to claim 6 is characterized in that:
Among the step e, integral control electric current reduction formula is:
I
p=I
t×S
h=(a
1+b
1t)×(S
h＝a
2+b
2h)
I wherein
pFor reaching, reservoir walls under the different liquid levels of differing temps protects required protective current fully.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210567571.4A CN103060818B (en) | 2012-12-24 | 2012-12-24 | Full-automatic control-corrosion system and application method of solar-energy hot-water storage tank |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210567571.4A CN103060818B (en) | 2012-12-24 | 2012-12-24 | Full-automatic control-corrosion system and application method of solar-energy hot-water storage tank |
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| Publication Number | Publication Date |
|---|---|
| CN103060818A true CN103060818A (en) | 2013-04-24 |
| CN103060818B CN103060818B (en) | 2014-11-05 |
Family
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|---|---|---|---|
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104451702A (en) * | 2013-09-25 | 2015-03-25 | 珠海格力电器股份有限公司 | Water heater |
| CN105910275A (en) * | 2016-04-12 | 2016-08-31 | 芜湖美的厨卫电器制造有限公司 | Electric water heater |
| CN113063518A (en) * | 2021-03-24 | 2021-07-02 | 山东特种设备检验检测集团有限公司 | Atmospheric storage tank bottom plate corrosion monitoring method based on optical fiber sensing |
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| JPS60169576A (en) * | 1984-02-10 | 1985-09-03 | Sanyo Electric Co Ltd | Corrosion preventive device for hot water tank |
| CN2818497Y (en) * | 2005-09-02 | 2006-09-20 | 过梦飞 | Applied current cathode protector on internal wall for steel water tank |
| US7585397B2 (en) * | 2006-04-30 | 2009-09-08 | Farwest Corrosion Control Company | Automatic potential control cathodic protection system for storage tanks |
| CN202133113U (en) * | 2011-04-29 | 2012-02-01 | 重庆欧凯电器有限公司 | Adjustable cathode protection type water heater |
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2012
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60169576A (en) * | 1984-02-10 | 1985-09-03 | Sanyo Electric Co Ltd | Corrosion preventive device for hot water tank |
| CN2818497Y (en) * | 2005-09-02 | 2006-09-20 | 过梦飞 | Applied current cathode protector on internal wall for steel water tank |
| US7585397B2 (en) * | 2006-04-30 | 2009-09-08 | Farwest Corrosion Control Company | Automatic potential control cathodic protection system for storage tanks |
| CN202133113U (en) * | 2011-04-29 | 2012-02-01 | 重庆欧凯电器有限公司 | Adjustable cathode protection type water heater |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104451702A (en) * | 2013-09-25 | 2015-03-25 | 珠海格力电器股份有限公司 | Water heater |
| CN104451702B (en) * | 2013-09-25 | 2018-06-05 | 珠海格力电器股份有限公司 | A kind of water heater |
| CN105910275A (en) * | 2016-04-12 | 2016-08-31 | 芜湖美的厨卫电器制造有限公司 | Electric water heater |
| CN105910275B (en) * | 2016-04-12 | 2019-11-15 | 芜湖美的厨卫电器制造有限公司 | Electric heater |
| CN113063518A (en) * | 2021-03-24 | 2021-07-02 | 山东特种设备检验检测集团有限公司 | Atmospheric storage tank bottom plate corrosion monitoring method based on optical fiber sensing |
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| Publication number | Publication date |
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| CN103060818B (en) | 2014-11-05 |
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Address after: 266071 Shandong province Qingdao city fushansuo No. 727 Applicant after: CISRI Qingdao Marine Corrosion Institute Applicant after: Qingdao CISRI Nanogram Detection Protection Technology Co., Ltd. Address before: 266071 wheat Island, Qingdao, Shandong Applicant before: CISRI Qingdao Marine Corrosion Institute Applicant before: Qingdao CISRI Nanogram Detection Protection Technology Co., Ltd. |
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Address after: 266071 Shandong province Qingdao city fushansuo No. 727 Applicant after: CISRI Qingdao Marine Corrosion Institute Applicant after: Qingdao CISRI Nanogram Detection Protection Technology Co., Ltd. Address before: 266071 Shandong province Qingdao city fushansuo No. 727 Applicant before: CISRI Qingdao Marine Corrosion Institute Applicant before: Qingdao CISRI Nanogram Detection Protection Technology Co., Ltd. |
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Effective date of registration: 20180207 Address after: 266071 room B, room B, No. 1, intelligence island road, Qingdao hi tech Zone, Shandong Patentee after: Qingdao CISRI Nanogram Detection Protection Technology Co., Ltd. Address before: 266071 Shandong province Qingdao city fushansuo No. 727 Co-patentee before: Qingdao CISRI Nanogram Detection Protection Technology Co., Ltd. Patentee before: CISRI Qingdao Marine Corrosion Institute |