CN220550010U - Corrosion prevention device for indirect air cooling circulating water system - Google Patents
Corrosion prevention device for indirect air cooling circulating water system Download PDFInfo
- Publication number
- CN220550010U CN220550010U CN202321404416.0U CN202321404416U CN220550010U CN 220550010 U CN220550010 U CN 220550010U CN 202321404416 U CN202321404416 U CN 202321404416U CN 220550010 U CN220550010 U CN 220550010U
- Authority
- CN
- China
- Prior art keywords
- circulating water
- water tank
- hydrogen
- indirect air
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 143
- 238000001816 cooling Methods 0.000 title claims abstract description 23
- 238000005536 corrosion prevention Methods 0.000 title description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000001257 hydrogen Substances 0.000 claims abstract description 39
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 39
- 238000005260 corrosion Methods 0.000 claims abstract description 30
- 239000007789 gas Substances 0.000 claims abstract description 27
- 230000007797 corrosion Effects 0.000 claims abstract description 23
- 230000001105 regulatory effect Effects 0.000 claims abstract description 16
- 239000007921 spray Substances 0.000 claims description 11
- 239000010935 stainless steel Substances 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 abstract description 6
- 239000002184 metal Substances 0.000 abstract description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 8
- 239000001301 oxygen Substances 0.000 description 8
- 229910052760 oxygen Inorganic materials 0.000 description 8
- 238000011282 treatment Methods 0.000 description 8
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 229910000975 Carbon steel Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000010962 carbon steel Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 238000006056 electrooxidation reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 150000001450 anions Chemical class 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Landscapes
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The application discloses an anti-corrosion device for indirect air cooling circulating water system includes: the water tank comprises a circulating water inlet, a circulating water outlet, a water space and a gas space, an exhaust valve, a gas regulating valve and a safety valve, and is used for hydrotreating circulating water flowing through the water tank; the hydrogen supply source is used for outputting high-purity hydrogen and inputting the output hydrogen into the water tank through the gas regulating valve and the connecting pipeline; the water tank sets up the circulating water circuit between expansion tank and host computer circulating water pump of indirect air cooling system, and this application can effectual control or reduce the speed of metal corrosion.
Description
Technical Field
The utility model relates to an anti-corrosion device for an indirect air-cooling circulating water system, and belongs to the field of metal corrosion.
Background
The presence of dissolved oxygen and carbon dioxide in the circulating water is a significant cause of corrosion of the structural materials and equipment. The addition of hydrogen gas to the anode metal can not only inhibit the concentration of dissolved oxygen in water, but also reduce or eliminate the corrosion current (corrosion rate) of the anode metal caused by the participation of the dissolved oxygen in water in the corrosion cathode reaction.
The SCAL indirect air cooling unit gradually becomes the first choice of a newly built thermal power unit, and the unit has the advantages of small space occupation of an indirect cooling tower, capability of meeting the large-scale of the unit and the like. However, three metal materials with large chemical property differences of carbon steel, stainless steel and pure aluminum are simultaneously used in the indirect air-cooling circulating water system, and a water quality treatment device is not designed, so that material corrosion becomes a great difficulty which puzzles the safe operation of the indirect air-cooling circulating water system.
At present, all running power plants often slow down material corrosion in a system by controlling the quality of circulating water, and the main method comprises the following steps: water changing treatment, cation bed bypass treatment and CO ventilation 2 Treatment and dosing treatment (mainly hydrazine). The SCAL type inter-cooling circulating water system has water capacity of about ten thousand tons, the water changing treatment has no ideal purifying effect on water quality, and the economic efficiency is poor, so that water resources are wasted. Cationic bed bypass method and CO feed 2 Treatment althoughThe pH value of the circulating water can be prevented from rising, the alkaline corrosion of aluminum is slowed down, but corrosive anions in the water cannot be removed, and the corrosion of carbon steel materials cannot be slowed down but accelerated. So-called medicated treatments (mainly hydrazine) have given users a concern about their use due to the potential carcinogenic toxicity of hydrazine.
Disclosure of Invention
The utility model provides an anti-corrosion device for an indirect air cooling circulating water system, which solves the problem of oxygen corrosion of carbon steel, pure aluminum and stainless steel materials of the existing circulating water system.
In order to solve the technical problems, the utility model provides the following technical scheme:
an anti-corrosion device for an indirect air-cooled circulating water system, comprising: the water tank comprises a circulating water inlet, a circulating water outlet, a water space and a gas space, an exhaust valve, a gas regulating valve and a safety valve, and is used for hydrotreating circulating water flowing through the water tank; the hydrogen supply source is used for outputting high-purity hydrogen and inputting the output hydrogen into the water tank through the gas regulating valve and the connecting pipeline; the water tank is arranged in a circulating water loop between the expansion water tank of the indirect air cooling system and the main machine circulating water pump.
Because the corrosion of the indirect air-cooled circulating water system belongs to cathode control type electrochemical corrosion, the cathode depolarizer is oxygen dissolved in circulating water. Therefore, the high-purity hydrogen is added into the circulating water, so that the concentration of dissolved oxygen in the circulating water can be reduced, and the contact between air and the circulating water is blocked, and the metal corrosion rate can be effectively controlled or reduced.
Drawings
FIG. 1 is a schematic view of an anti-corrosion device for an indirect air-cooled circulating water system according to one embodiment of the present application.
Detailed Description
The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present utility model only, and are not intended to limit the present utility model.
The indirect air-cooling circulating water systems are generally two types, and the first type is a hybrid condenser indirect air-cooling system which is also called a sea-tangle type indirect air-cooling system and generally comprises a boiler; a superheater; a steam turbine; a jet condenser; a condensate pump; a condensate polishing device; a condensate booster pump; a low pressure heater; a deaerator; a water feed pump; a high pressure heater; a cooling water circulation pump; pressure regulating water turbine; an all-aluminum radiator; an air cooling tower; a bypass throttle valve; and (5) a generator. The second one is a surface condenser indirect air cooling system which is also called a Harmony indirect air cooling system and generally comprises a boiler; a superheater; a steam turbine; a surface condenser; a condensate pump; a condensate polishing device; a condensate booster pump; a low pressure heater; a deaerator; a water feed pump; a high pressure heater; a circulating water pump; an expansion tank; an all-aluminum radiator; an air cooling tower; an iron remover; and (5) a generator.
The utility model provides an anti-corrosion device for an indirect air-cooling circulating water system, which comprises: the water tank comprises a circulating water inlet, a circulating water outlet, a water space and a gas space, an exhaust valve, a gas regulating valve and a safety valve, and is used for hydrotreating circulating water flowing through the water tank; the hydrogen supply source is used for outputting high-purity hydrogen and inputting the output hydrogen into the water tank through the gas regulating valve and the connecting pipeline; the water tank is arranged in a circulating water loop between the expansion water tank of the indirect air cooling system and the main machine circulating water pump.
In one embodiment, the high-purity hydrogen is depressurized and then enters an air inlet of the gas regulating valve, and then enters an air space of the water tank through an air outlet of the gas regulating valve and a connecting pipeline, and the safety valve and the exhaust valve are arranged at the top of the water tank.
In one embodiment, the pressure of the relief valve is 0.05 atmospheres to ensure that a hydrogen seal in the tank is achieved and to prevent leakage of hydrogen.
In one embodiment, the hydrogen content of the high purity hydrogen is greater than 99.99%.
In one embodiment, the hydrogen content of the circulating water flowing out of the water tank is 20-30ml/kg.
In one embodiment, a spray head is arranged at the circulating water inlet at the top of the water tank, and the circulating water sprayed from the spray head is atomized so as to be fully fused with the hydrogen entering the water tank.
In one embodiment, the taper angle of the spray head is 92 °.
In one embodiment, the spray head is made of stainless steel.
The implementation of the utility model is further described below with reference to the accompanying drawings:
the corrosion protection apparatus for an indirect air-cooled circulating water system as shown in fig. 1 includes: a hydrogen supply source 1 for supplying high purity hydrogen to the water tank; the water tank 3 is internally divided into a water space and a gas space, a circulating water inlet and a circulating water outlet are formed in the water tank 3, an exhaust valve 5, a gas regulating valve 2 and a safety valve 4 are further arranged at the top of the water tank, the water tank 3 is used for hydrotreating circulating water flowing through the water tank, and meanwhile, waste gas in the water tank is discharged through the exhaust valve 5, namely discharged gas 8 in the figure;
the water tank 3 is connected between the main machine circulating water pump 6 and the expansion water tank 9 of the indirect air cooling circulating water system, and the circulating water loop 7 is connected with the main machine circulating water pump 6 and the expansion water tank 9. The hydrogen gas supplied from the hydrogen gas supply source 1 enters the gas space of the water tank 3 through the gas regulating valve 2, a safety valve 4 and an exhaust valve 5 are arranged at the top of the water tank 3, and the pressure of the safety valve is set to be 0.05 atmosphere, so that the realization of hydrogen gas seal and the prevention of hydrogen leakage are ensured. The circulating water inlet connecting pipe at the top of the water tank is provided with a spray head which is made of stainless steel, the cone angle of the spray head is 92 degrees, and the spray head is used for atomizing liquid to form liquid mist with small diameter so as to increase the contact area between the liquid and surrounding media. The hydrogen supply source 1 system provides hydrogen with the purity of 99.99 percent, the hydrogen enters the gas space of the water tank 3 after being depressurized through the gas regulating valve 2, the downward leakage flow from the circulating water loop is sprayed into the water tank from the top of the water tank, carbon dioxide, nitrogen and the like in the circulating water are fully released and gathered in the gas phase of the water tank, the mole fraction of the hydrogen is reduced, and the partial pressure of the hydrogen is reduced under the condition that the gas phase pressure is unchanged. The circulating water then enters the circulating water loop 7 under the pressure of the main machine circulating water pump 6. When the measured value of the dissolved hydrogen in the circulating water is obviously reduced, the exhaust valve of the water tank can be opened to exhaust other gases outwards, and hydrogen is filled to maintain the gas phase pressure so as to improve the hydrogen partial pressure. After the hydrotreatment in the circulating water, the hydrogen content in the circulating water is controlled to be 20-30ml/kg as the preference. Because the corrosion of the indirect air-cooled circulating water system belongs to cathode control type electrochemical corrosion, the cathode depolarizer is oxygen dissolved in circulating water. Therefore, the high-purity hydrogen is added into the circulating water, so that the concentration of dissolved oxygen in the circulating water can be reduced, and the contact between air and the circulating water is blocked, and the metal corrosion rate can be effectively controlled or reduced.
The preferred embodiments of the present utility model have been described above with reference to the accompanying drawings, and thus do not limit the scope of the claims of the present utility model. Those skilled in the art will appreciate that many modifications are possible in which the utility model is practiced without departing from its scope or spirit, e.g., features of one embodiment can be used with another embodiment to yield yet a further embodiment. Any modification, equivalent replacement and improvement made within the technical idea of the present utility model should be within the scope of the claims of the present utility model.
Claims (8)
1. An anti-corrosion device for an indirect air-cooled circulating water system, comprising: the water tank comprises a circulating water inlet, a circulating water outlet, a water space and a gas space, an exhaust valve, a gas regulating valve and a safety valve, and is used for hydrotreating circulating water flowing through the water tank;
the hydrogen supply source is used for outputting high-purity hydrogen and inputting the output hydrogen into the water tank through the gas regulating valve and the connecting pipeline;
the water tank is arranged in a circulating water loop between the expansion water tank of the indirect air cooling system and the main machine circulating water pump.
2. The corrosion protection device for an indirect air-cooled circulating water system of claim 1, wherein: the high-purity hydrogen is depressurized and then enters an air inlet of the gas regulating valve, then enters an air space of the water tank through an air outlet of the gas regulating valve and a connecting pipeline, and the safety valve and the exhaust valve are arranged at the top of the water tank.
3. The corrosion protection device for an indirect air-cooled circulating water system according to claim 1 or 2, characterized in that: the pressure of the safety valve is 0.05 atmosphere to ensure that the hydrogen gas seal in the water tank is realized and the hydrogen leakage is prevented.
4. The corrosion protection device for an indirect air-cooled circulating water system of claim 1, wherein: the hydrogen content of the high-purity hydrogen is more than 99.99%.
5. The corrosion protection device for an indirect air-cooled circulating water system of claim 1, wherein: the hydrogen content of the circulating water flowing out of the water tank is 20-30ml/kg.
6. The corrosion protection device for an indirect air-cooled circulating water system of claim 1, wherein: the circulating water inlet at the top of the water tank is provided with a spray head, and circulating water sprayed from the spray head is atomized to be fully fused with hydrogen entering the water tank.
7. The corrosion protection device for an indirect air-cooled circulating water system of claim 6, wherein: the cone angle of the spray head was 92 °.
8. The corrosion protection device for an indirect air-cooled circulating water system of claim 6, wherein: the spray head is made of stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321404416.0U CN220550010U (en) | 2023-06-01 | 2023-06-01 | Corrosion prevention device for indirect air cooling circulating water system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321404416.0U CN220550010U (en) | 2023-06-01 | 2023-06-01 | Corrosion prevention device for indirect air cooling circulating water system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220550010U true CN220550010U (en) | 2024-03-01 |
Family
ID=90009908
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321404416.0U Active CN220550010U (en) | 2023-06-01 | 2023-06-01 | Corrosion prevention device for indirect air cooling circulating water system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220550010U (en) |
-
2023
- 2023-06-01 CN CN202321404416.0U patent/CN220550010U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113663495B (en) | System and process for improving nitrite ratio in production of two sodium products | |
| CN103920384A (en) | Equipment for absorbing high-concentration nitric oxides by adopting normal-pressure process | |
| CN220550010U (en) | Corrosion prevention device for indirect air cooling circulating water system | |
| CN220317417U (en) | Heat recovery device for sulfuric acid system dry suction section and sulfuric acid production line | |
| CN102357310A (en) | Waste gas processing method | |
| CN108854167B (en) | Recycling system of condensate after methane steam conversion in coke oven gas | |
| CN212356689U (en) | Water quality control device for preventing corrosion of indirect air cooling circulating water system | |
| CN220537508U (en) | Corrosion prevention device for indirect air cooling circulating water system | |
| CN114105359A (en) | High-concentration ammonia nitrogen wastewater catalytic oxidation treatment device and treatment method thereof | |
| CN104555922A (en) | New technology for producing hydrogen by conversion of methyl alcohol and water vapor | |
| CN213037484U (en) | Heterogeneous wet catalytic oxidation's of kind equipment | |
| CN112679022B (en) | Low-temperature concentration desulfurization wastewater zero discharge system | |
| CN212895012U (en) | Device for cooling and saving water and preheating anode by using flue gas of aluminum electrolysis cell and waste heat | |
| CN108434965B (en) | Turbine exhaust gas treatment device | |
| CN112723319A (en) | High concentration of SO2Method for preparing sulfuric acid by flue gas separation pre-conversion | |
| CN209835673U (en) | Carbon black tail gas power plant circulating water utilization device | |
| CN113339770A (en) | Intensive energy-saving sulfur trioxide gas cooling system for sulfonation process and cooling method thereof | |
| CN112195485A (en) | Method and device for cooling and saving water by using flue gas of aluminum electrolysis cell and preheating anode by using waste heat | |
| CN219929775U (en) | Carbon steel corrosion control structure for indirect air cooling circulating water system | |
| CN214619470U (en) | Steam cascade utilization system | |
| CN217584391U (en) | Continuous-discharge flash tank drainage heat value recycling device | |
| CN212409430U (en) | Large-scale filler cooling tower device for recovering flue gas waste heat of power plant and eliminating white smoke | |
| CN215061998U (en) | Energy-saving deoxidizing device for steam turbine | |
| CN209721590U (en) | A kind of oxidation reactor in Hydrogen Peroxide Production | |
| CN215027493U (en) | Low-temperature methanol washing pipeline system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |