CN118257966A - Device for removing non-condensable gas and nuclear power station water delivery pipeline - Google Patents
Device for removing non-condensable gas and nuclear power station water delivery pipeline Download PDFInfo
- Publication number
- CN118257966A CN118257966A CN202410356968.1A CN202410356968A CN118257966A CN 118257966 A CN118257966 A CN 118257966A CN 202410356968 A CN202410356968 A CN 202410356968A CN 118257966 A CN118257966 A CN 118257966A
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- separation chamber
- section
- water
- gas
- pipe section
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 69
- 239000007789 gas Substances 0.000 claims abstract description 77
- 238000000926 separation method Methods 0.000 claims abstract description 62
- 239000007788 liquid Substances 0.000 claims abstract description 55
- 238000009792 diffusion process Methods 0.000 claims abstract description 28
- 230000007246 mechanism Effects 0.000 claims abstract description 8
- 238000005086 pumping Methods 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims 1
- 239000013043 chemical agent Substances 0.000 abstract description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 7
- 239000001301 oxygen Substances 0.000 abstract description 7
- 229910052760 oxygen Inorganic materials 0.000 abstract description 7
- 239000000126 substance Substances 0.000 abstract description 7
- 230000036541 health Effects 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Separating Particles In Gases By Inertia (AREA)
Abstract
The invention provides a device for removing non-condensable gas and a water delivery pipeline of a nuclear power station, wherein the device comprises an inlet pipe section, a diffusion section and an outlet pipe section which are connected in sequence, and the shaft diameter of the diffusion section is smaller than that of the inlet pipe section and the outlet pipe section; at least one bleed air pipe, one end of which is communicated with the diffusion section and extends along the upper part deviating from the diffusion section; the device also comprises a separation mechanism, wherein the separation mechanism comprises a separation chamber, an exhaust pipeline is arranged at the top of the separation chamber, a liquid discharge pipeline is arranged at the bottom of the separation chamber, the other end of the air guide pipe is communicated with the separation chamber, and one end of the liquid discharge pipeline is communicated with the outlet pipe section; wherein, the separation chamber is in a continuous negative pressure state. The device for removing the non-condensable gas reduces the oxygen content in water in a physical mode, and the desalted water meets the water chemistry requirement in a repeated circulation and exhaust mode, so that the chemical pollution risk of deoxidizing by using chemical agents is greatly reduced, and the safety of equipment and the health of maintenance personnel are guaranteed.
Description
Technical Field
The invention relates to the technical field of nuclear power station water delivery, in particular to a device for removing non-condensable gas and a nuclear power station water delivery pipeline.
Background
The stable and safe operation of the nuclear power station needs water chemistry support meeting the requirement, and particularly needs desalted and deoxidized water as a supplementary water source for operation.
Currently, a nuclear power plant generally adopts a chemical agent added with deoxidization to remove non-condensable gases such as dissolved oxygen, or adopts means such as hydrogen addition to inhibit the oxygen content.
And the chemical agent is adopted for deoxidizing, a special anti-corrosion adding device and interface are required to be configured, a special storage area is matched, and the special storage area is managed by a special person. The chemical agents themselves are chemical contaminants and also present a potential hazard to personnel. If the non-condensable gas can be continuously removed by adopting a physical means in the operation process, the oxygen content is reduced, the desalted water meets the water chemistry requirement, the addition amount of chemical agents is greatly reduced, the risk of chemical pollution is reduced, and the health of personnel is guaranteed.
Based on the above, the present inventors have proposed a device for removing non-condensable gas and a nuclear power plant water pipe, so as to solve the above-mentioned technical problems.
Disclosure of Invention
The invention aims to overcome the defects that a mode of removing non-condensable gas in a water pipe of a nuclear power station in the prior art is easy to cause chemical pollution and is troublesome to arrange and manage, and provides a device for removing non-condensable gas and the water pipe of the nuclear power station.
The invention solves the technical problems by the following technical proposal:
The invention provides a device for removing non-condensable gas, which is characterized by comprising the following components: the device comprises an inlet pipe section, a diffusion section and an outlet pipe section which are connected in sequence, wherein the shaft diameter of the diffusion section is smaller than that of the inlet pipe section and the outlet pipe section;
At least one bleed air pipe, one end of which is communicated with the diffusion section and extends along the upper part away from the diffusion section;
The separation mechanism comprises a separation chamber, an exhaust pipeline is arranged at the top of the separation chamber, a liquid discharge pipeline is arranged at the bottom of the separation chamber, the other end of the air guide pipe is communicated with the separation chamber, and one end of the liquid discharge pipeline is communicated with the outlet pipe section; wherein,
The separation chamber is in a continuous negative pressure state.
According to one embodiment of the invention, the diameter of the inlet pipe section near one end of the diffusion section is gradually reduced;
The shaft diameter of the outlet pipe section towards one end of the diffusion section is gradually reduced.
According to one embodiment of the invention, the number of bleed air pipes is at least two, and at least two bleed air pipes are arranged at intervals along the axial direction of the diffuser.
According to one embodiment of the invention, the axial direction of the gas-guiding pipe and the axial direction of the diffusion section form an included angle.
According to one embodiment of the invention, at least two of the bleed air pipes converge along an end facing away from the diffuser section and flow together into the separation chamber.
According to one embodiment of the invention, the diameter of each of the gas-introducing tubes is smaller than the diameter of the diffuser section.
According to one embodiment of the invention, the top of the separation chamber is provided with a plurality of gas guide vanes which are arranged upwards in a spiral manner along the axial direction of the separation chamber;
the bottom of the separation chamber is provided with a plurality of liquid guide vanes, and the liquid guide vanes are spirally downwards distributed along the axial direction of the separation chamber.
According to one embodiment of the invention, liquid guide holes are formed between adjacent gas guide vanes.
According to one embodiment of the invention, an exhaust pump is arranged on the exhaust pipeline;
a liquid discharge pump is arranged on the liquid discharge pipe and is used for pumping water collected at the bottom of the separation chamber; the downstream of the liquid discharge pump is also provided with a liquid discharge valve which is used for controlling the on-off between the separation chamber and the outlet pipe section.
The invention also provides a nuclear power station water delivery pipeline, which is characterized by comprising:
A water pipe;
And the at least two non-condensable gas removing devices are arranged along the conveying path of the water conveying pipeline, and are arranged in the water conveying pipeline, so that water in the water conveying pipeline flows through the non-condensable gas removing devices.
The invention has the positive progress effects that:
According to the device for removing the non-condensable gas, the fluid is accelerated and depressurized in a necking mode by utilizing the hydrodynamics and thermodynamic principles, the non-condensable gas in the water is continuously separated out under low pressure, and then the gas is introduced into the separation chamber by utilizing the gas introducing pipe, so that the non-condensable gas is continuously removed by utilizing a physical means, the oxygen content in the water is reduced, the desalted water meets the water chemistry requirement in a repeated circulation exhaust mode, the chemical pollution risk of deoxidizing by using a chemical agent is greatly reduced, and the safety of equipment and the health of maintenance personnel are guaranteed.
Drawings
The above and other features, properties and advantages of the present invention will become more apparent from the following description in conjunction with the accompanying drawings and embodiments, in which:
FIG. 1 is a schematic diagram of an exemplary non-condensable gas removal apparatus according to the present invention;
FIG. 2 is a schematic diagram of an embodiment of a nuclear power plant water conduit according to the present invention;
Fig. 3 is a schematic view of another embodiment of the water pipe of the nuclear power station according to the present invention.
1. A water pipe;
2. An inlet pipe section;
3. a diffusion section;
4. an outlet pipe section;
5. an air-introducing pipe;
6. A separation mechanism; 61. a separation chamber; 62. an exhaust duct; 621. an exhaust pump; 63. a liquid discharge pipe; 631. a liquid discharge pump; 632. a liquid discharge valve; 64. a gas guide vane; 641. a liquid guiding hole; 65. a liquid guide vane;
7. Means for removing non-condensable gases.
Detailed Description
The present invention will be further described with reference to specific embodiments and drawings, in which more details are set forth in the following description in order to provide a thorough understanding of the present invention, but it will be apparent that the present invention can be embodied in many other forms than described herein, and that those skilled in the art may make similar generalizations and deductions depending on the actual application without departing from the spirit of the present invention, and therefore should not be construed to limit the scope of the present invention in terms of the content of this specific embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.
Referring to fig. 1, the invention provides a device 7 for removing non-condensable gas, which is installed on a nuclear power water pipe 1, wherein the device 7 for removing non-condensable gas comprises an inlet pipe section 2, a diffusion section 3 and an outlet pipe section 4 which are connected in sequence, and the shaft diameter of the diffusion section 3 is smaller than that of the inlet pipe section 2 and the outlet pipe section 4.
The diffuser section 3 is provided with at least one bleed air pipe 5, and one end of the bleed air pipe 5 is communicated with the diffuser section 3 and extends along the upper part away from the diffuser section 3. The other end of the air-introducing pipe 5 is also provided with a separating mechanism 6, the separating mechanism 6 comprises a separating chamber 61, an exhaust pipeline 62 is arranged at the top of the separating chamber 61, a liquid discharge pipeline 63 is arranged at the bottom of the separating chamber 61, the other end of the air-introducing pipe 5 is communicated with the separating chamber 61, and one end of the liquid discharge pipeline 63 is communicated with the outlet pipe section 4; wherein the separation chamber 61 is in a continuous negative pressure state.
Compared with the traditional mode of removing the dissolved oxygen in the water by adopting chemical agents, the application adopts the fluid mechanics and thermodynamic principles to realize the acceleration and the depressurization of the fluid by adopting a tapered and gradually expanding mode, the non-condensable gas in the water is continuously separated out under low pressure, and the separated gas is introduced into the separation chamber 61 by arranging the gas introducing pipe 5 in the low pressure area corresponding to the diffusion section 3.
The separation chamber 61 is divided into an exhaust pipe 62 and a liquid discharge pipe 63 from top to bottom, the exhaust pipe 62 can continuously discharge the collected gas, and the liquid discharge pipe 63 can return the liquid contained in the gas to the water conveying pipe 1 again, so that the waste of water is avoided.
Furthermore, since the separation chamber 61 is in a continuously negative pressure state due to the arrangement of the exhaust line 62, it is advantageous to continuously introduce the non-condensable gases which are evolved in the diffuser 3 into the separation chamber 61 via the bleed air line 5.
In one embodiment, the inlet pipe section 2 tapers in axial diameter near one end of the diffuser section 3; the outlet pipe section 4 gradually reduces in diameter toward one end of the diffuser section 3.
That is, the end parts of the inlet pipe section 2 and the outlet pipe section 4 facing the diffusion section 3 are arranged in a tapered structure, so that the flow rate and the pressure of the water in the water pipe 1 are increased gradually through the inlet pipe section 2, and the flow rate and the pressure of the water in the water pipe 1 are also correspondingly reduced and increased through the diffusion section 3 and the outlet pipe section 4, so that the change of the flow rate and the pressure of the water in the water pipe 1 is avoided.
Preferably, the number of bleed air pipes 5 is at least two, at least two bleed air pipes 5 being arranged at intervals in the axial direction of the diffuser 3.
The plurality of gas-introducing pipes 5 are arranged at intervals along the axial direction of the diffuser section 3, so that the absorption efficiency of the non-condensable gas can be improved, and the specific number of the gas-introducing pipes 5 is not limited.
Specifically, the axial direction of the bleed air pipe 5 is arranged at an axial angle to the diffuser 3.
The gas-introducing pipe 5 is arranged in an inclined manner relative to the diffusion section 3, so that the characteristic of small gas density can move upwards, and the gas conveying efficiency is improved.
In one embodiment, at least two bleed air pipes 5 converge along the end facing away from the diffuser 3 and flow together into the separation chamber 61.
In order to avoid the plurality of holes being formed outside the separation chamber 61, the plurality of air pipes 5 are gathered before reaching the separation chamber 61, so that only one pipeline is needed to be connected with the separation chamber 61, and the structure of the separation mechanism 6 is simplified.
Further, the diameter of each of the gas-introducing pipes 5 is smaller than the diameter of the diffuser section 3.
The diameter of the gas-introducing pipe 5 is set smaller than the diameter of the diffusion section 3 in order to avoid that too much water enters the gas-introducing pipe 5 to affect the degassing efficiency due to the too large diameter of the gas-introducing pipe 5.
In one embodiment, the top of the separation chamber 61 is provided with a plurality of gas guiding vanes 64, and the plurality of gas guiding vanes 64 are arranged spirally upwards along the axial direction of the separation chamber 61. The bottom of the separation chamber 61 is provided with a plurality of liquid guide vanes 65, and the plurality of liquid guide vanes 65 are spirally arranged downwards along the axial direction of the separation chamber 61.
The gas is continuously conveyed upwards through the gas guide vane 64 under the absorption of the exhaust pipeline 62, the gas and the liquid are separated under the action of centrifugal force, and the separated liquid flows into the liquid discharge pipeline 63 through the liquid guide vane 65 and then flows into the water conveying pipeline 1.
In one embodiment, liquid guide holes 641 are formed between adjacent gas guide vanes 64.
That is, when the gas is conveyed along the gas guide vane 64 toward the exhaust duct 62, the liquid contained in the gas flows to the liquid guide vane 65 side through the liquid guide holes 641.
The exhaust pipe 62 is provided with an exhaust pump 621, the liquid discharge pipe is provided with a liquid discharge pump 631, and the liquid discharge pump 631 is used for pumping water collected at the bottom of the separation chamber 61; a drain valve 632 is also provided downstream of the drain pump 631, the drain valve 632 being used to control the on-off between the separation chamber 61 and the outlet pipe section 4.
Before the non-condensable gas is removed, the exhaust pump 621 can be started to pump air in the separation chamber 61 to form a negative pressure environment, so that the non-condensable gas precipitated in the diffusion section 3 is more beneficial to be conveyed to the exhaust pipeline 62 to be discharged outwards, and the removal efficiency of the non-condensable gas is improved.
The application adopts the principles of hydrodynamics and thermodynamics to realize the acceleration and depressurization of fluid, the non-condensable gas in water is continuously separated out under low pressure, the separated gas is introduced into the separation chamber 61 through the gas-guiding pipe 5, the separation chamber 61 further separates the gas from the liquid, the gas is pumped out through the exhaust pump 621, and the liquid flows into the water-guiding pipe 1 again through the liquid-discharging pump 631. According to the application, the non-condensable gas is continuously discharged through a physical means, so that the oxygen content in water is reduced, and the desalted water can meet the water chemistry requirement through repeated circulation of exhaust.
In a normal operation state, fluid enters the diffusion section 3 through the inlet pipe section 2, the flow speed of the fluid in the diffusion section 3 is increased, the pressure is reduced, and as the pressure is reduced, non-condensable gas dissolved in water is continuously separated out in the diffusion section 3. At least one bleed air duct 5 is provided in the diffuser 3, along which bleed air duct 5 the gas which has evolved can be conveyed upwards while liquid is entrained. The gas in the gas introducing pipe 5 reaches the separation chamber 61 and is continuously discharged to the outside of the separation chamber 61 by the gas guide vane 64 and the discharge pump 621; the trace amount of liquid entrained in the gas gradually adheres to the upper inner wall of the separation chamber 61 by centrifugal force during upward flow, and finally flows from the liquid guide hole 641 into the lower portion of the separation chamber 61.
The drain pipe 63 may drain the collected liquid to the outside of the separation chamber 61 by driving the drain pump 631.
It should be noted that, a liquid level meter may be further disposed in the separation chamber 61, where the liquid level meter is used to monitor the liquid level in the lower portion of the separation chamber 61, and when the liquid level meter reaches a high setting value, the liquid discharge pump 631 is turned on, and the liquid enters the outlet pipe section 4 through the liquid discharge pipe 63.
When the gauge reaches a low setting, the drain pump 631 and drain valve 632 are closed.
The invention also provides a nuclear power station water delivery pipeline, which comprises: the device for removing the non-condensable gas comprises a water conveying pipeline 1 and at least two devices 7 for removing the non-condensable gas, wherein the devices 7 are arranged along the conveying path of the water conveying pipeline 1, and the devices 7 for removing the non-condensable gas are arranged on the water conveying pipeline 1, so that water in the water conveying pipeline 1 flows through the devices 7 for removing the non-condensable gas.
Referring to fig. 2 and 3, the present invention may be provided with a plurality of devices 7 for removing non-condensable gas (refer to fig. 3) on the water pipe 1 at intervals, or the water in the water pipe 1 may flow through the devices 7 for removing non-condensable gas (refer to fig. 2) for a plurality of times, so as to remove non-condensable gas in the water, so that the desalted water meets the water chemistry requirement, the chemical pollution risk of deoxidizing by using chemical agents is greatly reduced, and the safety of equipment and the health of maintenance personnel are facilitated.
In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like should be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; but also mechanical connection, and the specific meaning of the above terms in the embodiments of the present application will be understood by those skilled in the art according to the specific circumstances.
Spatially relative terms, such as "above … …," "above … …," "upper surface on … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
The application uses specific words to describe embodiments of the application. Reference to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic is associated with at least one embodiment of the application. Thus, it should be emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various positions in this specification are not necessarily referring to the same embodiment. Furthermore, certain features, structures, or characteristics of one or more embodiments of the application may be combined as suitable.
While the invention has been described in terms of preferred embodiments, it is not intended to be limiting, but rather to the invention, as will occur to those skilled in the art, without departing from the spirit and scope of the invention. Therefore, any modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention fall within the protection scope defined by the claims of the present invention.
Claims (10)
1. A device for removing non-condensable gas, which is installed on a water pipe of a nuclear power station, and is characterized by comprising: the device comprises an inlet pipe section, a diffusion section and an outlet pipe section which are connected in sequence, wherein the shaft diameter of the diffusion section is smaller than that of the inlet pipe section and the outlet pipe section;
At least one bleed air pipe, one end of which is communicated with the diffusion section and extends along the upper part away from the diffusion section;
The separation mechanism comprises a separation chamber, an exhaust pipeline is arranged at the top of the separation chamber, a liquid discharge pipeline is arranged at the bottom of the separation chamber, the other end of the air guide pipe is communicated with the separation chamber, and one end of the liquid discharge pipeline is communicated with the outlet pipe section; wherein,
The separation chamber is in a continuous negative pressure state.
2. The apparatus for removing non-condensable gases according to claim 1, wherein the inlet pipe section has a gradually decreasing diameter near one end of the diffuser section;
The shaft diameter of the outlet pipe section towards one end of the diffusion section is gradually reduced.
3. The device for removing non-condensable gases according to claim 1, wherein the number of bleed air pipes is at least two, and at least two bleed air pipes are arranged at intervals along the axial direction of the diffuser.
4. A device for removing non-condensable gases as claimed in claim 3 wherein the axial direction of the bleed tube is disposed at an axial angle to the diffuser.
5. A device for removing non-condensable gases as claimed in claim 3, characterized in that at least two of the bleed air pipes converge along the end facing away from the diffuser section and flow together into the separation chamber.
6. A device for removing non-condensable gases as claimed in claim 3 wherein the diameter of each of the gas-introducing pipes is less than the diameter of the diffuser section.
7. The device for removing non-condensable gas according to claim 1, wherein a plurality of gas guide vanes are arranged at the top of the separation chamber, and the plurality of gas guide vanes are arranged upwards in a spiral manner along the axial direction of the separation chamber;
the bottom of the separation chamber is provided with a plurality of liquid guide vanes, and the liquid guide vanes are spirally downwards distributed along the axial direction of the separation chamber.
8. The apparatus for removing non-condensable gases as set forth in claim 7, wherein liquid-guiding holes are formed between adjacent gas-guiding vanes.
9. The apparatus for removing non-condensable gases according to claim 7, wherein an exhaust pump is provided on the exhaust pipe;
a liquid discharge pump is arranged on the liquid discharge pipe and is used for pumping water collected at the bottom of the separation chamber; the downstream of the liquid discharge pump is also provided with a liquid discharge valve which is used for controlling the on-off between the separation chamber and the outlet pipe section.
10. A nuclear power plant water conduit, comprising:
A water pipe;
At least two non-condensable gas removal devices according to any one of claims 1 to 9 arranged along the conveying path of the water conveying pipeline, wherein the non-condensable gas removal devices are arranged on the water conveying pipeline, so that water in the water conveying pipeline flows through the non-condensable gas removal devices.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410356968.1A CN118257966A (en) | 2024-03-27 | 2024-03-27 | Device for removing non-condensable gas and nuclear power station water delivery pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410356968.1A CN118257966A (en) | 2024-03-27 | 2024-03-27 | Device for removing non-condensable gas and nuclear power station water delivery pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118257966A true CN118257966A (en) | 2024-06-28 |
Family
ID=91608828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410356968.1A Pending CN118257966A (en) | 2024-03-27 | 2024-03-27 | Device for removing non-condensable gas and nuclear power station water delivery pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118257966A (en) |
-
2024
- 2024-03-27 CN CN202410356968.1A patent/CN118257966A/en active Pending
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