CN219867850U - Device for reducing oxygen dissolved in condensed water - Google Patents
Device for reducing oxygen dissolved in condensed water Download PDFInfo
- Publication number
- CN219867850U CN219867850U CN202320428903.4U CN202320428903U CN219867850U CN 219867850 U CN219867850 U CN 219867850U CN 202320428903 U CN202320428903 U CN 202320428903U CN 219867850 U CN219867850 U CN 219867850U
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- Prior art keywords
- vacuum deaerator
- condensed water
- extraction unit
- dissolved oxygen
- steam extraction
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 52
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 239000001301 oxygen Substances 0.000 title claims abstract description 48
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 48
- 238000000605 extraction Methods 0.000 claims abstract description 30
- 239000010963 304 stainless steel Substances 0.000 claims description 4
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 9
- 238000001816 cooling Methods 0.000 abstract description 5
- 238000006056 electrooxidation reaction Methods 0.000 abstract description 4
- 239000002184 metal Substances 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000001172 regenerating effect Effects 0.000 abstract 2
- 238000011084 recovery Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 4
- 239000003518 caustics Substances 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
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- Physical Water Treatments (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The utility model relates to a device for reducing the dissolved oxygen of condensed water, which comprises a vacuum deaerator, a high-temperature high-pressure steam extraction unit and a hot well, wherein the vacuum deaerator is provided with a steam inlet pipe; the high-temperature high-pressure steam extraction unit is communicated with a steam inlet pipe of the vacuum deaerator; the thermal well is communicated with the vacuum deaerator. By means of the high-temperature high-pressure steam extraction unit, the steam inlet pressure and the temperature of the vacuum deaerator are improved, so that the deoxidization effect of the vacuum deaerator on the condensate water is improved, the dissolved oxygen content in the condensate water is effectively reduced, and the dissolved oxygen content of the condensate water reaches the standard. After the condensed water reaching the dissolved oxygen standard enters the heat exchange system and the auxiliary pipeline of the heat exchange system, the primary cell effect can not occur, and electrochemical corrosion of metal parts in the pipeline is avoided. Meanwhile, the heat exchange thermal resistance of the steam turbine regenerative system is reduced, and the regenerative efficiency is improved. In addition, the vacuum degree of the condenser is improved, the safe operation of equipment is ensured, and the economic benefit and the load capacity of the air cooling unit are improved.
Description
Technical Field
The utility model relates to the technical field of air cooling units, in particular to a device for reducing the dissolved oxygen content of condensed water.
Background
Along with the improvement of the capacity of a thermal power generating unit in recent years, higher requirements are put on the quality of the condensed water, and the oxygen content of the condensed water is an important index of chemical supervision. According to the specification of 'steam quality of thermal generator set and steam power equipment' (GB/T12145-2018), the expected value of the dissolved oxygen of the condensed water of the 3000MW thermal generator set reaches 30ug/L, most of the time of the dissolved oxygen of the condensed water in normal operation of the set can meet the standard requirement, the air does not enter and the supercooling degree is zero in an ideal state, and the solubility of oxygen in liquid tends to zero. The condenser is thus designed in a deaerator-like fashion and works best at full load operation.
The principle of operation of a vacuum deaerator is to apply henry's law and dalton's law, and it is known from henry's law that in a closed vessel, any gas is present on the water surface at the same time, the solubility of the gas is proportional to its own partial pressure, and the solubility of the gas is only related to its own partial pressure. The partial pressure of the vacuum deaerator on the water surface is reduced under a certain negative pressure, the partial pressure of air and oxygen is smaller and smaller, the partial pressure of oxygen is reduced to zero, and the dissolved oxygen in the water is also reduced to zero. When the pressure on the water surface is smaller than the atmospheric pressure, the solubility of oxygen can reach zero at a lower water temperature. Thus, oxygen molecules in the space above the water surface are extracted or converted into other gases, so that the partial pressure of oxygen is zero, and oxygen in the water is continuously extracted, thereby achieving the deoxidization effect.
However, the conditions of high oxygen content in condensed water are easily caused by the influence of equipment aging, abnormal water supply, equipment leakage and the like. After the condensed water with exceeding dissolved oxygen enters the heat exchange system and the auxiliary pipeline of the heat exchange system, a primary cell effect appears, so that electrochemical corrosion is generated on metal parts in the pipeline. Meanwhile, the surface of the heat exchange surface of the heat recovery system of the steam turbine can form a film on the surface of the heat exchanger due to the accumulated corrosive substances, so that the heat exchange resistance is increased, the heat recovery efficiency is reduced, the high content of the dissolved oxygen in the condensed water also means that excessive air leaks into the condenser, the vacuum degree is reduced, the economy of the unit is adversely affected, the output of the unit is reduced when the vacuum degree is severe, the steam extraction load of the steam extraction system is increased, and the energy loss is caused.
Therefore, how to effectively reduce the dissolved oxygen content in the condensed water is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
In order to solve the problem of higher dissolved oxygen content in the condensed water, the utility model provides a device for reducing the dissolved oxygen content of the condensed water.
The device for reducing the dissolved oxygen of the condensed water provided by the utility model for realizing the purpose comprises:
the vacuum deaerator is provided with a steam inlet pipe;
the high-temperature high-pressure steam extraction unit is communicated with a steam inlet pipe of the vacuum deaerator;
and the hot well is communicated with the vacuum deaerator.
In some embodiments, the high-temperature high-pressure steam extraction unit is a seventh section of steam extraction pipeline arranged inside the condenser.
In some embodiments, the method further comprises:
and two ends of the first stop valve are respectively communicated with the high-temperature high-pressure steam extraction unit and the vacuum deaerator.
In some embodiments, the method further comprises:
and two ends of the second stop valve are respectively communicated with the hot well and the vacuum deaerator.
In some embodiments, the first shut-off valve is a manual shut-off valve.
In some embodiments, the pipeline used for communicating the high-temperature high-pressure steam extraction unit and the vacuum deaerator is a 304 stainless steel seamless pipe.
In some embodiments, the caliber of a pipeline used for communicating the high-temperature high-pressure steam extraction unit with the vacuum deaerator is 210mm-220mm.
In some embodiments, the lower part of the vacuum deaerator is a deaeration water tank, and the upper part is a deaeration tower;
the deoxidizing tower is provided with a steam inlet pipe.
The utility model has the beneficial effects that: according to the device for reducing the dissolved oxygen of the condensate water, the high-temperature high-pressure steam extraction unit is used for improving the steam inlet pressure and the temperature of the vacuum deaerator, so that the deoxidization effect of the vacuum deaerator on the condensate water is improved, the dissolved oxygen content in the condensate water is effectively reduced, and the dissolved oxygen content of the condensate water reaches the standard. After the condensed water reaching the dissolved oxygen standard enters the heat exchange system and the auxiliary pipeline of the heat exchange system, the primary cell effect can not occur, and electrochemical corrosion of metal parts in the pipeline is avoided. Meanwhile, the surface of the heat exchange surface of the heat recovery system of the steam turbine can not form a film on the surface of the heat exchanger due to the accumulated corrosive substances, so that the heat exchange resistance is reduced, and the heat recovery efficiency is improved. In addition, the vacuum degree of the condenser is improved, the safe operation of equipment is ensured, and the economic benefit and the load capacity of the air cooling unit are improved.
Drawings
FIG. 1 is a schematic view showing the structure of an apparatus for reducing the oxygen dissolved in condensed water according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of some embodiments of vacuum deaerators in the apparatus for reducing dissolved oxygen in condensate shown in FIG. 1.
In the drawing, 110, a vacuum deaerator; 111. deoxidizing the water tank; 112. an oxygen removal tower; 1121. a steam inlet pipe; 120. a high-temperature high-pressure steam extraction unit; 130. a hot well; 140. a first stop valve; 150. and a second shut-off valve.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.
Examples of the embodiments are illustrated in the accompanying drawings, wherein like or similar symbols indicate like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.
In the description of the present utility model, it should be understood that the terms "top," "bottom," "inner," "outer," "axis," "circumferential," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience in describing the present utility model or simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," "engaged," "hinged," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
As described in the background art, the condition that the content of dissolved oxygen in the condensed water is higher is easily caused by the influence of equipment aging, abnormal water supplementing, equipment leakage and the like.
In order to improve the above problems, referring to fig. 1 and 2, there is provided a device for reducing dissolved oxygen of condensed water in the present utility model, which includes a vacuum deaerator 110, a high temperature and high pressure steam extraction unit 120, a thermal well 130, a first shut-off valve 140, and a second shut-off valve 150. Wherein the vacuum deaerator 110 is provided with an inlet pipe 1121. The high temperature and high pressure extraction unit 120 communicates with the intake pipe 1121 of the vacuum deaerator 110. The thermal well 130 communicates with the vacuum deaerator 110. Both ends of the first shut-off valve 140 are respectively communicated with the high-temperature and high-pressure steam extraction unit 120 and the vacuum deaerator 110. The two ends of the second shut-off valve 150 are respectively communicated with the hot well 130 and the vacuum deaerator 110. The separation is performed by the first and second shut-off valves 140 and 150, respectively. The high-temperature high-pressure steam extraction unit 120 is used for improving the steam inlet pressure and temperature of the vacuum deaerator 110, so that the deaeration effect of the vacuum deaerator 110 on the condensate is improved, the dissolved oxygen content in the condensate is effectively reduced, and the dissolved oxygen content of the condensate reaches the standard. After the condensed water reaching the dissolved oxygen standard enters the heat exchange system and the auxiliary pipeline of the heat exchange system, the primary cell effect can not occur, and electrochemical corrosion of metal parts in the pipeline is avoided. Meanwhile, the surface of the heat exchange surface of the heat recovery system of the steam turbine can not form a film on the surface of the heat exchanger due to the accumulated corrosive substances, so that the heat exchange resistance is reduced, and the heat recovery efficiency is improved. In addition, the vacuum degree of the condenser is improved, the safe operation of equipment is ensured, and the economic benefit and the load capacity of the air cooling unit are improved.
Preferably, in the exemplary embodiment, the high-temperature and high-pressure steam extraction unit 120 is a seventh steam extraction pipeline disposed inside the condenser. By utilizing the characteristic that the steam extraction pressure of the seventh section of steam extraction pipeline arranged in the condenser is high in temperature, the steam inlet pressure and the temperature of the vacuum deaerator 110 are improved at lower cost, the deaeration effect of the vacuum deaerator 110 on the condensate is further improved, the dissolved oxygen content in the condensate is effectively reduced, and the dissolved oxygen content of the condensate reaches the standard. The safe operation of the equipment is ensured, and the economical efficiency and the load capacity of the air cooling unit are improved. Under normal working conditions, the supplemented desalted water passes through the vacuum deaerator 110, and the dissolved oxygen content can reach the standard.
Preferably, in the illustrated example, the first shut-off valve 140 is a manual shut-off valve. The operator can directly control the opening and closing of the manual stop valve.
Preferably, in the exemplary embodiment, the high temperature and high pressure steam extraction unit 120 is a 304 stainless steel seamless tube in communication with the vacuum deaerator 110. The 304 stainless steel seamless pipe is a steel pipe which is resistant to weak corrosive media such as air, steam, water and the like and chemical corrosive media such as acid, alkali, salt and the like.
Preferably, in the exemplary embodiment, the high temperature and high pressure steam extraction unit 120 communicates with the vacuum deaerator 110 using a pipe diameter of 210mm-220mm. Specifically, the pipe caliber used for communicating the high-temperature high-pressure steam extraction unit 120 with the vacuum deaerator 110 is 210mm, 215mm, 219mm or 220mm.
Preferably, in the illustrated example, the vacuum deaerator 110 has a deaeration water tank 111 in a lower portion and a deaeration tower 112 in an upper portion. The internal structures of the deaeration water tank 111 and the deaeration tower 112 are prior art, and are not described herein. Wherein, the deoxidizing tower 112 is provided with a steam inlet pipe 1121.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "examples," "particular examples," "one particular embodiment," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The present utility model is not limited to the above preferred embodiments, and any person skilled in the art, within the scope of the present utility model, may apply to the present utility model, and equivalents and modifications thereof are intended to be included in the scope of the present utility model.
Claims (8)
1. A device for reducing the dissolved oxygen content of condensed water, comprising:
the vacuum deaerator is provided with a steam inlet pipe;
the high-temperature high-pressure steam extraction unit is communicated with a steam inlet pipe of the vacuum deaerator;
and the thermal well is communicated with the vacuum deaerator.
2. The device for reducing oxygen dissolved in condensed water according to claim 1, wherein said high-temperature high-pressure steam extraction unit is a seventh-stage steam extraction pipeline arranged inside a condenser.
3. The apparatus for reducing oxygen dissolved in condensed water according to claim 1, further comprising:
and two ends of the first stop valve are respectively communicated with the high-temperature high-pressure steam extraction unit and the vacuum deaerator.
4. The apparatus for reducing oxygen dissolved in condensed water according to claim 3, further comprising:
and two ends of the second stop valve are respectively communicated with the hot well and the vacuum deaerator.
5. The apparatus for reducing oxygen dissolved in condensed water according to claim 3, wherein said first stop valve is a manual stop valve.
6. The apparatus for reducing oxygen dissolved in condensed water according to any one of claims 1 to 5, wherein a pipe line used for communicating the high-temperature high-pressure steam extraction unit with the vacuum deaerator is a 304 stainless steel seamless pipe.
7. The apparatus for reducing oxygen dissolved in condensed water according to any one of claims 1 to 5, wherein a pipe diameter used for communicating the high-temperature high-pressure steam extraction unit with the vacuum deaerator is 210mm to 220mm.
8. The device for reducing dissolved oxygen of condensed water according to any one of claims 1 to 5, wherein the lower part of the vacuum deaerator is a deaeration water tank, and the upper part is a deaeration tower;
and a steam inlet pipe is arranged on the deoxidizing tower.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320428903.4U CN219867850U (en) | 2023-03-07 | 2023-03-07 | Device for reducing oxygen dissolved in condensed water |
| JP2023001074U JP3242218U (en) | 2023-03-07 | 2023-04-01 | Device for reducing the amount of dissolved oxygen in condensed water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320428903.4U CN219867850U (en) | 2023-03-07 | 2023-03-07 | Device for reducing oxygen dissolved in condensed water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219867850U true CN219867850U (en) | 2023-10-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320428903.4U Active CN219867850U (en) | 2023-03-07 | 2023-03-07 | Device for reducing oxygen dissolved in condensed water |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP3242218U (en) |
| CN (1) | CN219867850U (en) |
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2023
- 2023-03-07 CN CN202320428903.4U patent/CN219867850U/en active Active
- 2023-04-01 JP JP2023001074U patent/JP3242218U/en active Active
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| Publication number | Publication date |
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| JP3242218U (en) | 2023-06-02 |
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