CN115200398A - Nitrogen sealing method for heat supply and storage tank - Google Patents
Nitrogen sealing method for heat supply and storage tank Download PDFInfo
- Publication number
- CN115200398A CN115200398A CN202210644174.6A CN202210644174A CN115200398A CN 115200398 A CN115200398 A CN 115200398A CN 202210644174 A CN202210644174 A CN 202210644174A CN 115200398 A CN115200398 A CN 115200398A
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- Prior art keywords
- storage tank
- heat storage
- nitrogen
- water
- tank body
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F11/00—Arrangements for sealing leaky tubes and conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F17/00—Removing ice or water from heat-exchange apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D2020/0065—Details, e.g. particular heat storage tanks, auxiliary members within tanks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention provides a nitrogen sealing method for a heat supply and storage tank, which comprises a heat storage tank body required in the method, wherein a heat storage overflow pipe is arranged on one side of the heat storage tank body, an upper water distributor is arranged in the heat storage tank body, and a lower water distributor is arranged below the upper water distributor and in the heat storage tank body, and comprises the following steps: s1, a nitrogen sealing mechanism is arranged on the upper portion of a heat storage tank body and is sealed by using nitrogen, so that corrosion of equipment on the top of the heat storage tank in a high-temperature environment is prevented; s2, configuring a breather valve mechanism on the top surface of the heat storage tank body to keep the top of the heat storage tank body relatively constant; and S3, arranging an overflow water seal mechanism at one end of the heat storage overflow pipe to prevent high-temperature water vapor from overflowing and assist in controlling the pressure at the top of the heat storage tank body.
Description
Technical Field
The invention relates to the technical field of heat supply and energy storage, in particular to a nitrogen sealing method for a heat supply and storage tank.
Background
In the processes of high-quality heat supply, deep adjustment of the unit, peak rush of the unit, and rush repair of the unit and heat supply equipment, the heat supply and storage tank of the large heat supply unit becomes an indispensable part of a heat supply system, and is widely applied to the heat supply unit.
The heat storage temperature of the heat supply and storage tank is designed to be 98 ℃, the energy storage medium is heat supply circulating water added with a preservative, the oxygen content is extremely high, the exposed and leaked part is easy to be oxidized and corroded, the service life of equipment is shortened, and the equipment is damaged due to serious corrosion; the 98 ℃ heat supply circulating water can generate steam, and a large amount of high-temperature water steam can be discharged through the overflow pipe if the heat supply circulating water is not sealed, so that a large amount of heat is wasted, and the energy conservation is not facilitated; the steam with the temperature of 98 ℃ is arranged on the top of the tank, the liquid level swings and the heat storage temperature changes during operation, the pressure swing on the top of the tank is large, and if no pressure control is carried out, the safe operation of the heat storage tank is influenced.
Disclosure of Invention
The invention provides a nitrogen sealing method for a heat supply and storage tank, aiming at solving the technical problems of high-temperature corrosion, steam overflow and unstable tank top pressure in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a heat supply and storage tank nitrogen gas sealing method, includes the required heat storage tank body in this method, one side of heat storage tank body is equipped with the heat-retaining overflow pipe, the inside of heat storage tank body is equipped with the water-locator, the one end of going up the water-locator is equipped with hot water pipeline, go up the below of water-locator the inside of heat storage tank body is equipped with down the water-locator, the one end of water-locator is equipped with the cold water pipeline down, includes following method steps:
s1, a nitrogen sealing mechanism is arranged on the upper portion of the heat storage tank body and is sealed by using nitrogen, so that corrosion of equipment on the top of the heat storage tank in a high-temperature environment is prevented;
s2, a breather valve mechanism is arranged on the top surface of the heat storage tank body and used for keeping the top of the heat storage tank body relatively constant;
and S3, arranging an overflow water seal mechanism at one end of the heat storage overflow pipe to prevent high-temperature water vapor from overflowing and assist in controlling the pressure at the top of the heat storage tank body.
Furthermore, a hot water isolation valve is arranged at the front end of the hot water pipeline, and a cold water isolation valve is arranged at the front end of the cold water pipeline.
Further, nitrogen gas sealing mechanism is including supplying the nitrogen pipeline, the one end that supplies the nitrogen pipeline is located upper portion one side of heat storage tank body, the lower extreme that supplies the nitrogen pipeline is equipped with the air feed stop, the upper end that supplies the nitrogen pipeline is equipped with and supplies nitrogen self-operated control valve, keep away from on the upper portion of heat storage tank body one side that supplies the nitrogen pipeline is equipped with nitrogen gas pressure release pipe, nitrogen gas pressure release pipe's middle part is equipped with nitrogen gas pressure self-operated control valve.
Further, breather valve mechanism includes a plurality of heat storage tank breather valves, and is a plurality of heat storage tank breather valve all locates the top surface middle part of heat storage tank body is a plurality of be equipped with nitrogen between the heat storage tank breather valve and seal pressure transmitter, nitrogen seals pressure transmitter electric connection respectively a plurality of heat storage tank breather valve.
Further, overflow water seal mechanism includes the water seal groove, the water seal groove is located the lower extreme of heat-retaining overflow pipe, the outside in water seal groove is equipped with water seal temperature transmitter and water seal water level transmitter, one side in water seal groove is equipped with the water seal overflow pipe, the opposite side in water seal groove is equipped with water seal moisturizing pipeline, the one end of water seal moisturizing pipeline is connected hot water pipeline, the middle part in water seal moisturizing pipeline is equipped with water seal moisturizing valve, water seal moisturizing valve electric connection water seal temperature transmitter with water seal water level transmitter.
Furthermore, the top surface of heat storage tank body is equipped with nitrogen gas purity detector.
Compared with the prior art, the invention has the beneficial effects that:
by using nitrogen gas for sealing, the corrosion of equipment on the top of the heat storage tank in a high-temperature environment can be prevented due to the inertia of the nitrogen gas; an overflow water seal mechanism is arranged at the lower part of an overflow pipe of the heat storage tank, so that nitrogen gas at the top can be sealed, high-temperature water vapor can be prevented from overflowing, the high overflow function of the liquid level of the heat storage tank is not influenced, and the top pressure can be controlled in an assisted manner; a breather valve mechanism is arranged at the top of the heat storage tank and matched with a nitrogen sealing mechanism, so that the nitrogen pressure at the top of the heat storage tank is relatively constant; thereby effectively solving the problems of high-temperature corrosion of equipment, steam overflow and unstable pressure at the top of the tank which influence the safety and economic operation of the heat storage tank.
Drawings
FIG. 1 is a schematic view of the external structure of the present invention;
FIG. 2 is a schematic sectional view of the internal structure of the present invention;
FIG. 3 is a schematic cross-sectional view of the internal structure of the present invention;
FIG. 4 is a schematic diagram of the nitrogen sealing mechanism, breather valve mechanism and nitrogen purity detector of the present invention;
fig. 5 is a schematic structural diagram of the overflow water seal mechanism of the invention.
In the figure: 1. a heat storage tank body; 11. a heat storage overflow pipe; 12. an upper water distributor; 13. a hot water pipe; 131. a hot water isolation valve; 14. a lower water distributor; 15. a cold water pipe; 151. a cold water isolation valve; 2. a nitrogen sealing mechanism; 21. a nitrogen supply conduit; 22. an air supply stop valve; 23. a nitrogen supply self-operated regulating valve; 24. a nitrogen pressure relief pipe; 25. the nitrogen pressure self-operated adjusting valve; 3. a breather valve mechanism; 31. a heat storage tank breather valve; 32. a nitrogen-sealed pressure transmitter; 4. an overflow water seal mechanism; 41. water sealing the tank; 42. a water seal temperature transmitter; 43. a water seal level transmitter; 44. a water seal overflow pipe; 45. water seal water replenishing pipeline; 46. a water seal water replenishing valve; 5. a nitrogen purity detector.
Detailed Description
In order to facilitate an understanding of the invention, the invention will now be described more fully hereinafter with reference to the accompanying drawings, in which several embodiments of the invention are shown, but which may be embodied in different forms and not limited to the embodiments described herein, but which are provided so as to provide a more thorough and complete disclosure of the invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may be present, and when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present, as the terms "vertical", "horizontal", "left", "right" and the like are used herein for descriptive purposes only.
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 invention belongs, and the use of such term knowledge in the specification of the invention is for the purpose of describing particular embodiments and is not intended to be limiting of the invention, and the use of the term "and/or" herein includes any and all combinations of one or more of the associated listed items.
In an embodiment, please refer to fig. 1-2 again, a method for sealing a heat supply and storage tank with nitrogen includes a heat storage tank body 1 required in the method, a heat storage overflow pipe 11 is disposed on one side of the heat storage tank body 1, an upper water distributor 12 is disposed inside the heat storage tank body 1, a hot water pipeline 13 is disposed at one end of the upper water distributor 12, a lower water distributor 14 is disposed below the upper water distributor 12 and inside the heat storage tank body 1, and a cold water pipeline 15 is disposed at one end of the lower water distributor 14, including the following steps:
s1, a nitrogen sealing mechanism 2 is arranged on the upper portion of a heat storage tank body 1, and nitrogen is used for sealing to prevent equipment on the top of the heat storage tank from being corroded in a high-temperature environment;
s2, a breather valve mechanism 3 is arranged on the top surface of the heat storage tank body 1 and used for keeping the top of the heat storage tank body 1 relatively constant;
and S3, arranging an overflow water seal mechanism 4 at one end of the heat storage overflow pipe 11 to prevent high-temperature water vapor from overflowing and assist in controlling the pressure at the top of the heat storage tank body 1.
In the embodiment, please refer to fig. 1-2 again, the front end of the hot water pipe 13 is provided with a hot water isolation valve 131, the front end of the cold water pipe 15 is provided with a cold water isolation valve 151, and this design establishes a hot water temperature gradient layer of the heat storage tank through the upper water distributor 12, isolates external hot water through the hot water isolation valve 131, establishes a cold water temperature gradient layer of the heat storage tank through the lower water distributor 14, and isolates external cold water through the cold water isolation valve 151.
The embodiment, please refer to fig. 3 heavily, nitrogen gas sealing mechanism 2 is including supplying nitrogen pipeline 21, the one end that supplies nitrogen pipeline 21 is located upper portion one side of heat storage tank body 1, the lower extreme that supplies nitrogen pipeline 21 is equipped with air feed stop valve 22, the upper end that supplies nitrogen pipeline 21 is equipped with and supplies nitrogen self-power governing valve 23, keep away from on the upper portion of heat storage tank body 1 one side that supplies nitrogen pipeline 21 is equipped with nitrogen pressure bleeder tube 24, the middle part of nitrogen pressure bleeder tube 24 is equipped with nitrogen pressure self-power governing valve 25, and this design supplies nitrogen gas for the upper portion of heat storage tank body 1 through supplying nitrogen pipeline 21, opens automatically when heat storage tank body 1 nitrogen pressure is less than 1kpa and supplies nitrogen self-power governing valve 23, is higher than 2kpa automatic closing and supplies nitrogen self-power governing valve 23, avoids the nitrogen gas backward flow through air feed stop valve 22, improves the leakproofness for nitrogen gas sealing mechanism 2.
The embodiment, please refer to fig. 3 again, breather valve mechanism 3 includes a plurality of heat storage tank breather valves 31, and is a plurality of heat storage tank breather valves 31 all locate heat storage tank body 1's top surface middle part, and is a plurality of be equipped with nitrogen between the heat storage tank breather valve 31 and seal pressure transmitter 32, nitrogen seals pressure transmitter 32 respectively electric connection is a plurality of heat storage tank breather valve 31, and this design surveys the inside real-time nitrogen gas pressure of heat storage tank body 1 through nitrogen seal pressure transmitter 32, and when 1 nitrogen gas pressure of heat storage tank body is at-0.75 ~ 3kpa automatic a plurality of heat storage tank breather valves 31 of opening, deviating self-closing.
In the embodiment, please refer to fig. 4 again, the overflow water sealing mechanism 4 includes a water sealing tank 41, the water sealing tank 41 is disposed at the lower end of the heat storage overflow pipe 11, a water sealing temperature transmitter 42 and a water sealing water level transmitter 43 are disposed at the outer side of the water sealing tank 41, a water sealing overflow pipe 44 is disposed at one side of the water sealing tank 41, a water sealing water replenishing pipe 45 is disposed at the other side of the water sealing tank 41, one end of the water sealing water replenishing pipe 45 is connected to the hot water pipe 13, a water sealing water replenishing valve 46 is disposed at the middle part of the water sealing water replenishing pipe 45, the water sealing water replenishing valve 46 is electrically connected to the water sealing temperature transmitter 42 and the water sealing water level transmitter 43, in this design, the overflow liquid is discharged through the heat storage overflow pipe 11, nitrogen is sealed through the water sealing tank 41, and high-temperature steam is prevented from overflowing through the heat storage overflow pipe 11; the water seal temperature transmitter 42 and the water seal level transmitter 43 sense signals to control the opening and closing of the water seal water replenishing valve 46, when the liquid level is low, the water replenishing is automatically opened, the water replenishing is required to be prevented from freezing in winter, and when the temperature is low, the water replenishing is automatically opened, and the water replenishing is closed after the temperature reaches a set value.
In the embodiment, please refer to fig. 5 again, the top surface of the heat storage tank body 1 is provided with a nitrogen purity detector 5.
The operation principle is as follows: firstly, the water seal tank 41 keeps the liquid level 1.5 m (P =15 kpa) to seal the heat storage overflow pipe 11, when the heat storage tank body 1 is in operation, the liquid level swings, the heat storage temperature changes, and when the pressure at the top of the tank changes, the nitrogen supply self-operated regulating valve 23, the nitrogen pressure self-operated regulating valve 25 and the plurality of heat storage tank breathing valves 31 automatically regulate, so that the nitrogen seal pressure transmitter 32 at the top of the heat storage tank body 1 keeps 2kpa unchanged. The pressure at the top of the heat storage tank body 1 is lower than 1kpa, the nitrogen supply self-regulating valve 23 is automatically opened, and the nitrogen supply self-regulating valve is automatically closed when the pressure is higher than 2 kpa. When the nitrogen pressure of the heat storage tank body 1 is higher than 2kpa, the nitrogen pressure is automatically opened from the self-regulating valve 25 and is automatically closed when the nitrogen pressure is lower than 2 kpa. When the nitrogen pressure of the heat storage tank body 1 is-0.75-3 kpa, the breathing valves 31 of the heat storage tanks are automatically opened and deviate from automatic closing.
Liquid level control of the water seal tank 41: when the liquid level of the water seal tank 41 is kept to be lower than 1.5 meters, the water seal water level transmitter 43 sends a signal, the water seal water replenishing valve 46 starts water replenishing and replenishes the water to 1.5 meters, the water seal water level transmitter 43 resets, the water seal water replenishing valve 46 is closed, and water replenishing is stopped.
Temperature control of the water seal tank 41: in winter, freezing prevention is needed, when the temperature of the water seal groove 41 is lower than 10 ℃, the water seal temperature transmitter 42 sends a signal, the water seal water replenishing valve 46 starts water replenishing, when the temperature rises to 10 ℃, the water seal temperature transmitter 42 resets, the water seal water replenishing valve 46 is closed, and water replenishing is stopped.
Overflow of the heat storage tank body 1: the liquid level of the heat storage tank body 1 is higher than that of the overflow pipe, the liquid flows into the water seal groove 41 through the heat storage overflow pipe 11, the water seal groove 41 overflows, and the overflow flows out to the outside through the water seal overflow pipe 44.
The invention is described above with reference to the accompanying drawings, it is obvious that the invention is not limited to the above-described embodiments, and it is within the scope of the invention to adopt such insubstantial modifications of the inventive method concept and solution, or to apply the inventive concept and solution directly to other applications without modification.
Claims (6)
1. The utility model provides a heat supply heat storage tank nitrogen gas sealing method, includes required heat storage tank body (1) in this method, one side of heat storage tank body (1) is equipped with heat-retaining overflow pipe (11), the inside of heat storage tank body (1) is equipped with water distributor (12), the one end of going up water distributor (12) is equipped with hot water pipeline (13), go up the below of water distributor (12) the inside of heat storage tank body (1) is equipped with down water distributor (14), the one end of water distributor (14) is equipped with cold water pipeline (15), its characterized in that down: the method comprises the following steps:
s1, a nitrogen sealing mechanism (2) is arranged on the upper portion of the heat storage tank body (1) and is sealed by using nitrogen, so that corrosion of equipment on the top of the heat storage tank in a high-temperature environment is prevented;
s2, a breather valve mechanism (3) is arranged on the top surface of the heat storage tank body (1) and used for keeping the top of the heat storage tank body (1) relatively constant;
and S3, arranging an overflow water sealing mechanism (4) at one end of the heat storage overflow pipe (11) to prevent high-temperature water vapor from overflowing and assist in controlling the pressure at the top of the heat storage tank body (1).
2. The nitrogen sealing method for the heat supply and storage tank as claimed in claim 1, wherein the nitrogen sealing method comprises the following steps: the front end of the hot water pipeline (13) is provided with a hot water isolation valve (131), and the front end of the cold water pipeline (15) is provided with a cold water isolation valve (151).
3. The nitrogen sealing method for the heat supply and storage tank as claimed in claim 1, wherein the nitrogen sealing method comprises the following steps: nitrogen gas sealing mechanism (2) are including supplying nitrogen pipeline (21), the one end that supplies nitrogen pipeline (21) is located upper portion one side of heat storage tank body (1), the lower extreme that supplies nitrogen pipeline (21) is equipped with air feed stop valve (22), the upper end that supplies nitrogen pipeline (21) is equipped with and supplies nitrogen self-operated adjusting valve (23), keep away from on the upper portion of heat storage tank body (1) one side that supplies nitrogen pipeline (21) is equipped with nitrogen gas pressure release pipe (24), the middle part of nitrogen gas pressure release pipe (24) is equipped with nitrogen gas pressure self-operated adjusting valve (25).
4. The nitrogen sealing method for the heat supply and storage tank as claimed in claim 1, wherein the nitrogen sealing method comprises the following steps: breather valve mechanism (3) are including a plurality of heat storage tank breather valves (31), and are a plurality of heat storage tank breather valve (31) all locate the top surface middle part of heat storage tank body (1), it is a plurality of be equipped with nitrogen seal pressure transmitter (32) between heat storage tank breather valve (31), nitrogen seal pressure transmitter (32) electric connection respectively is a plurality of heat storage tank breather valve (31).
5. The nitrogen sealing method for the heat supply and storage tank as claimed in claim 1, wherein the nitrogen sealing method comprises the following steps: overflow water seal mechanism (4) are including water seal groove (41), water seal groove (41) are located the lower extreme of heat-retaining overflow pipe (11), the outside of water seal groove (41) is equipped with water seal temperature transmitter (42) and water seal water level transmitter (43), one side of water seal groove (41) is equipped with water seal overflow pipe (44), the opposite side of water seal groove (41) is equipped with water seal moisturizing pipeline (45), the one end of water seal moisturizing pipeline (45) is connected hot water pipeline (13), the middle part of water seal moisturizing pipeline (45) is equipped with water seal moisturizing valve (46), water seal moisturizing valve (46) electric connection water seal temperature transmitter (42) with water seal water level transmitter (43).
6. The nitrogen sealing method for the heat supply and storage tank as claimed in claim 1, wherein the nitrogen sealing method comprises the following steps: the top surface of heat storage tank body (1) is equipped with nitrogen gas purity detector (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210644174.6A CN115200398A (en) | 2022-06-09 | 2022-06-09 | Nitrogen sealing method for heat supply and storage tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210644174.6A CN115200398A (en) | 2022-06-09 | 2022-06-09 | Nitrogen sealing method for heat supply and storage tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115200398A true CN115200398A (en) | 2022-10-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210644174.6A Pending CN115200398A (en) | 2022-06-09 | 2022-06-09 | Nitrogen sealing method for heat supply and storage tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115200398A (en) |
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2022
- 2022-06-09 CN CN202210644174.6A patent/CN115200398A/en active Pending
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