CN220287548U - System for solve heat supply drain tank dissolved oxygen and exceed standard - Google Patents
System for solve heat supply drain tank dissolved oxygen and exceed standard Download PDFInfo
- Publication number
- CN220287548U CN220287548U CN202321672916.2U CN202321672916U CN220287548U CN 220287548 U CN220287548 U CN 220287548U CN 202321672916 U CN202321672916 U CN 202321672916U CN 220287548 U CN220287548 U CN 220287548U
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- drain
- heat supply
- main
- heat exchanger
- heating coil
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 239000001301 oxygen Substances 0.000 title claims abstract description 26
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 26
- 238000010438 heat treatment Methods 0.000 claims abstract description 85
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 40
- 238000002955 isolation Methods 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 230000029058 respiratory gaseous exchange Effects 0.000 claims description 8
- 238000004321 preservation Methods 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 239000006260 foam Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 abstract 1
- 230000002209 hydrophobic effect Effects 0.000 description 15
- 241000209094 Oryza Species 0.000 description 12
- 235000007164 Oryza sativa Nutrition 0.000 description 12
- 235000009566 rice Nutrition 0.000 description 12
- 230000000694 effects Effects 0.000 description 9
- 230000008901 benefit Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000005871 repellent Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Landscapes
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
Abstract
The utility model relates to the technical field of heating systems, in particular to a system for solving the problem that the dissolved oxygen of a heating drain tank exceeds standard, which comprises a heating steam main pipe, wherein a plurality of groups of main heat exchangers are connected to the heating steam main pipe, steam inlets of the main heat exchangers are connected with the heating steam main pipe through pipelines, water outlets of the main heat exchangers are connected with a pressurized water discharging main pipe through pipelines, a water drain port of the main heat exchangers is connected with a water drain tank through pipelines, and the water drain tank is connected with a deaerator through a water drain pump.
Description
Technical Field
The utility model relates to the technical field of heating systems, in particular to a system which has a simple structure, is convenient to overhaul, reduces the risk of exceeding the standard of hydrophobic dissolved oxygen and has obvious deoxidization effect of a deoxidizer and solves the problem of exceeding the standard of the dissolved oxygen of a heating hydrophobic box.
Background
As known, due to the high-speed development of photovoltaic and wind power in China in recent years, the specific gravity of new energy sources in a power grid is larger and larger, the living space of a thermal power unit is seriously compressed, and the utilization time of an active environment-friendly high-efficiency high-capacity coal motor unit is reduced from 6000 hours of the first few years to about 4000 hours at present. Under the condition that the power grid structure is changed, in order to improve the economic benefit of power generation enterprises, the power plants start to supply heat and reform, the external heat supply quantity is increased, and a plurality of coal-fired power plants are added to the line of the social heat supply market in a mode of low-pressure cylinder zero-output technology and the like.
The low pressure cylinder zero-output heat supply technology is that under the high vacuum operation condition of the low pressure cylinder, the hydraulic butterfly valve capable of being completely sealed is adopted to cut off the inlet steam from the original inlet steam pipeline of the low pressure cylinder, and all low pressure heaters behind the deaerator are basically free from load. After the low-pressure cylinder zero-output heat supply technology is adopted in the large thermal power generating unit, as the low-pressure heater of the unit is completely withdrawn from operation, condensed water obtained after heat supply steam (medium-pressure cylinder steam exhaust) at about 320 ℃ is condensed by circulating water of a primary heat supply network is recovered to a unit hydrophobic tank, the condensed water temperature of the hydrophobic tank is about 70 ℃, the condensed water enters a deaerator through a hydrophobic pump, and the water inlet temperature of the deaerator of the unit is designed to be about 100 ℃. Because the heat supply station drain tank adopts atmospheric structure more, the drain tank upper portion is installed the drain tank and is arranged big valve. The main purpose of the big valve of the drainage tank is that before the heating system is put into operation and during operation, the valve is always opened to discharge a small amount of water vapor and air in the drainage tank, the drainage is contacted with the air through the big valve, and oxygen is dissolved into the drainage. When the water inlet temperature of the deaerator is lower than the design temperature, the deaeration effect of the water discharged into the deaerator is greatly reduced, so that the dissolved oxygen of the unit exceeds the standard (the control value is less than or equal to 20 mug/L of the dissolved oxygen at the outlet of the main condensate pump), and the oxidation corrosion of pipelines or equipment such as a heating surface of a boiler, a main heat exchanger, a ventilation part of a steam turbine and the like is caused, and the operation safety of the unit is seriously endangered.
Disclosure of Invention
The utility model aims to solve the defects of the prior art, and provides a system for solving the problem that the dissolved oxygen of a heat supply hydrophobic tank exceeds the standard, which has the advantages of simple structure, convenience in maintenance, reduction of the risk of exceeding the standard of the dissolved oxygen and remarkable deoxidization effect of a deoxidizer.
The technical scheme adopted for solving the technical problems is as follows:
the utility model provides a solve system that heat supply drain box dissolved oxygen exceeds standard, includes heat supply steam main pipe, heat supply steam main pipe on connect multiunit main heat exchanger, main heat exchanger's steam inlet is connected with heat supply steam main pipe through the pipeline, main heat exchanger's water drain is connected with pressurized water drain main pipe through the pipeline, main heat exchanger's water drain mouth is connected with the drain box through the pipeline, the drain box is connected with the deaerator through the drain pump, its characterized in that, the drain box in be equipped with heating coil, heating coil be connected with heat supply steam main pipe through the heating pipe that stretches out the heating coil of drain box, heating coil establish in the lower part of drain box, heating coil's lower extreme is equipped with the steam vent, connect the atomizing nozzle towards the below spraying on the steam vent, heat supply drain in the drain box is heated through heating coil.
The upper end of the hydrophobic tank is provided with a breathing port, and an automatic breather valve is arranged on the breathing port.
An air inlet electric isolation door and an air inlet electric regulating door are respectively arranged on a pipeline between the main heat exchanger and the heat supply steam main pipe, and the air inlet quantity is controlled through a valve.
The main heat exchanger is respectively provided with a steam side air vent valve and a steam side safety valve.
The drain port of the main heat exchanger is connected with a drain main pipe through a pipeline, the drain main pipe is connected with a drain box through a pipeline, and a drain isolation door and a drain electric regulating door are respectively arranged on the pipeline between the drain port and the drain main pipe.
The utility model relates to a critical water discharge electric door arranged on a pipeline between a water discharge port on a main heat exchanger and a pressurized water discharge main pipe.
The main heat exchanger comprises a No. 1 main heat exchanger, a No. 2 main heat exchanger and a No. 3 main heat exchanger.
The heating pipe between the heat supply steam main pipe and the drain tank is wrapped with the heat preservation layer, and the heat preservation layer is formed by wrapping a foam layer and an aluminum skin.
The heating coil is arranged at the position with the elevation of 0.5m at the bottom of the drain tank.
The heating coil is in a shape of a Chinese character 'mi', the middle part of the heating coil is connected with the heating pipe, eight end points of the heating coil in the shape of Chinese character 'mi' are connected and then are in an ellipse, the end parts of the heating coil in the shape of Chinese character 'mi' are connected through the ellipse pipe, the lower ends of the ellipse pipe and the heating coil in the shape of Chinese character 'mi' are respectively and uniformly connected with the atomizing nozzles, and the heating uniformity and the heating efficiency are increased through the connection between the heating coil in the shape of Chinese character 'mi' and the ellipse pipe.
Due to the adoption of the structure, the device has the advantages of simple structure, convenience in maintenance, reduction of the risk of exceeding the standard of the hydrophobic dissolved oxygen, remarkable deoxidization effect of the deoxidizer and the like.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is a schematic view of the heating coil of fig. 1.
Detailed Description
The utility model is further described below with reference to the accompanying drawings:
as shown in the drawing, a system for solving the problem that the dissolved oxygen of a heat supply drain tank exceeds standard comprises a heat supply steam main pipe 1, wherein a plurality of groups of main heat exchangers are connected to the heat supply steam main pipe 1, steam inlets of the main heat exchangers are connected with the heat supply steam main pipe 1 through pipelines, water outlets of the main heat exchangers are connected with a pressurized water discharge main pipe 2 through pipelines, water drainage outlets of the main heat exchangers are connected with a water drainage tank 3 through pipelines, the water drainage tank 3 is connected with a deaerator 5 through a water drainage pump 4, and the system is characterized in that a heating coil 6 is arranged in the water drainage tank 3, the heating coil 6 is connected with the heat supply steam main pipe 1 through a heating pipe 7 extending out of the heating coil 6 of the water drainage tank 3, the heating coil 6 is arranged at the lower part of the water drainage tank 3, the lower end of the heating coil 6 is provided with a steam drainage port, the steam drainage port is connected with an atomizing nozzle 8 spraying downwards, and the heating coil 6 heats the heat supply drain water in the water drainage tank 3.
Further, the upper end of the hydrophobic tank 3 is provided with a breathing port, and an automatic breather valve 9 is arranged on the breathing port.
Further, an air inlet electric isolation door 10 and an air inlet electric regulating door 11 are respectively arranged on the pipeline between the main heat exchanger and the heat supply steam main pipe 1, and the air inlet quantity is controlled through a valve.
Further, the main heat exchanger is respectively provided with a steam side air vent valve 12 and a steam side safety valve 13.
Further, the drain port of the main heat exchanger is connected with the drain main pipe 14 through a pipeline, the drain main pipe 14 is connected with the drain tank 3 through a pipeline, and a drain isolation door 15 and a drain electric regulating door 16 are respectively arranged on the pipeline between the drain port and the drain main pipe 14.
Further, a critical draining electric door 17 is arranged on a pipeline between the drain hole on the main heat exchanger and the pressurized drain main pipe 2.
Further, the main heat exchangers include a No. 1 main heat exchanger 18, a No. 2 main heat exchanger 19 and a No. 3 main heat exchanger 20.
Further, a heat-insulating layer is wrapped on the heating pipe 7 between the heat-supply steam main pipe 1 and the drain tank 3, and the heat-insulating layer is formed by wrapping a foam layer and an aluminum skin.
Further, the heating coil 6 is arranged at the position of 0.5m of the bottom elevation of the drain tank 3.
Further, the heating coil 6 set to the rice font, the middle part of the heating coil 6 of rice style of calligraphy is connected with heating pipe 7, is oval after being connected between the eight extreme points of the heating coil 6 of rice style of calligraphy, the tip of the heating coil 6 of rice style of calligraphy is through oval union coupling, atomizing nozzle 8 is connected to oval pipe and the lower extreme equipartition of the heating coil 6 of rice style of calligraphy respectively, can realize heating evenly through being connected between heating coil 6 of rice style of calligraphy and the oval pipe, increases heating efficiency.
The specific embodiment is as follows: the heat supply steam respectively enters a No. 3 main heat exchanger 20, a No. 2 main heat exchanger 19 and a No. 1 main heat exchanger 18 from the heat supply steam main pipe 1, and a steam inlet electric isolation door and a steam inlet electric regulating door are sequentially arranged between the No. 3 main heat exchanger 20, the No. 2 main heat exchanger 19 and the No. 1 main heat exchanger 18 from the heat supply steam main pipe 1. The main purpose of the installation of the steam inlet electric isolation door is to isolate the main heat exchanger from the main heat supply steam pipe 1 during the overhaul of the main heat exchanger equipment.
The critical draining electric door 17 is arranged between the No. 3 main heat exchanger 20, the No. 2 main heat exchanger 19 and the No. 1 main heat exchanger 18 and the pressurized draining main pipe 2. When the pipe of the main heat exchanger leaks, a large amount of heat supply network circulating water leaking out from faults passes through the critical draining electric door 17 and is discharged or recovered from the pressurized draining main pipe 2.
In the main heat exchanger, the heating steam heats the primary heat network circulating water to a prescribed temperature (heating temperature is about 90-100 ℃). The upper part of the main heat exchanger is provided with a steam side air vent valve 12 and a steam side safety valve, the main purpose of installing the steam side air vent valve 12 is to open the valve to remove residual air in a steam side pipeline and the main heat exchanger before the heating system is put into operation, and the steam side air vent valve 12 is closed during the heating operation.
The drain branch pipes are arranged between the No. 3 main heat exchanger 20, the No. 2 main heat exchanger 19 and the No. 1 main heat exchanger 18 and the drain tank 3, and the drain branch pipes are respectively provided with a drain isolation door 15 and a drain electric regulating door 16 in sequence. The three drain branch pipes are respectively connected to a drain main pipe 14, and the drain main pipe 14 is connected to the drain tank 3. The main function of the hydrophobic tank 3 is to recycle the condensed water of the heating steam, and then the condensed water is sent to the inlet of the deaerator 5 by the hydrophobic pump 4.
The drain tank 3 is provided with a breathing port, and an automatic breather valve 9 is additionally arranged on a gas exhaust pipeline of the breathing port. The valve opening pressure is regulated, so that the drain tank 3 always operates in a micro-positive pressure state, air is prevented from entering, and the problem of exceeding of the standard of the drain dissolved oxygen is solved. Action of automatic breather valve 9: when the pressure of the gas in the drain tank 3 is within the set opening pressure range of the automatic breather valve 9, the automatic breather valve 9 does not act, the seal of the drain tank 3 is kept, and the atmosphere is isolated from drain. When the pressure of the gas in the drain tank 3 increases and reaches the set opening pressure of the automatic breather valve 9, the breather valve is opened, and the gas escapes from the drain tank 3, so that the pressure in the drain tank 3 does not increase any more.
A heating pipe 7 is connected between the main heating steam pipe 1 and the drain tank 3, extends into the position of about 0.5 meter of the bottom elevation of the drain tank 3 and is connected with a heating coil pipe 6, and the added heating coil pipe 6 is arranged in an elliptical shape at the bottom of the drain tank 3; the heating coil 6 establish to the rice font, the middle part of the heating coil 6 of rice style of calligraphy is connected with heating pipe 7, is oval after being connected between the eight extreme points of the heating coil 6 of rice style of calligraphy, the tip of the heating coil 6 of rice style of calligraphy is through oval union coupling, atomizing nozzle 8 is connected to oval pipe and the lower extreme equipartition of the heating coil 6 of rice style of calligraphy respectively, can realize heating evenly through being connected between heating coil 6 of rice style of calligraphy and the oval pipe, increase heating efficiency, atomizing nozzle 8 is established to stainless steel atomizing nozzle 8, its installation down, the purpose is to let steam overturn from the bottom, improves the heating effect. The stainless steel atomizing nozzle 8 is selected, so that on one hand, the service life of the nozzle is prolonged, on the other hand, the steam is uniformly sprayed out, and the heating effect is improved. And finally, carrying out aluminum skin heat preservation on a heating pipe 7 between the heating steam main pipe 1 and the drain tank 3.
The utility model has the following advantages:
1. the automatic breather valve 9 is simple and convenient to install. And selecting a matched automatic breather valve 9 according to the caliber of the exhaust pipeline and the micro positive pressure value required, and installing the valve on the exhaust pipeline.
2. The automatic breather valve 9 is safe and reliable and is unmanned. When a large amount of drain water enters the water-repellent tank 3, the water level severely fluctuates, so that the air in the water-repellent tank 3 is extruded to exceed the set opening pressure of the automatic breather valve 9, the air is automatically discharged, and when the air is lower than the set opening pressure, the valve is closed, and the air is isolated from entering.
3. When the heat supply and drainage temperature is low, the automatic breather valve 9 is put into operation, so that the micro-positive pressure operation of the water-repellent tank 3 can be ensured, and meanwhile, the risk of exceeding the standard of the drainage dissolved oxygen can be reduced due to the isolation effect of the automatic breather valve 9 and the atmosphere.
4. When the heat supply and drainage temperature is low, the heating system of the hydrophobic tank 3 is put into operation, and the heat supply steam main pipe 1 is sprayed with steam by the stainless steel atomizing nozzle 8 so as to increase the drainage temperature in the hydrophobic tank 3, thereby not only relieving the deoxidization pressure of the deaerator 5, but also enhancing the deoxidization effect of the deaerator 5.
5. The deoxidization effect is stronger after the heating system of the running hydrophobic tank 3 is installed, and under the auxiliary deoxidization condition of the automatic breather valve 9, the problem of exceeding the standard of dissolved oxygen of the hydrophobic tank 3 can be fundamentally eliminated by the combined action of the double deoxidization functions.
Claims (10)
1. The utility model provides a solve system that heat supply drain box dissolved oxygen exceeds standard, includes heat supply steam main pipe, heat supply steam main pipe on connect multiunit main heat exchanger, main heat exchanger's steam inlet is connected with heat supply steam main pipe through the pipeline, main heat exchanger's water drain is connected with pressurized water drain main pipe through the pipeline, main heat exchanger's water drain mouth is connected with the drain box through the pipeline, the drain box is connected with the deaerator through the drain pump, its characterized in that, the drain box in be equipped with heating coil, heating coil be connected with heat supply steam main pipe through the heating pipe that stretches out the heating coil of drain box, heating coil establish in the lower part of drain box, heating coil's lower extreme is equipped with the steam vent, connect the atomizing nozzle towards the below spraying on the steam vent, heat supply drain in the drain box is heated through heating coil.
2. The system for solving the problem of exceeding dissolved oxygen of a heat supply drain tank according to claim 1, wherein the upper end of the drain tank is provided with a breathing port, and an automatic breather valve is arranged on the breathing port.
3. The system for solving the problem of exceeding the standard of dissolved oxygen in the heat supply drain tank according to claim 1, wherein an air inlet electric isolation door and an air inlet electric regulating door are respectively arranged on a pipeline between the main heat exchanger and the heat supply steam main pipe, and the air inlet amount is controlled through a valve.
4. The system for solving the problem of exceeding dissolved oxygen of a heat supply drain tank according to claim 1, wherein the main heat exchanger is respectively provided with a steam side vent valve and a steam side safety valve.
5. The system for solving the problem of exceeding dissolved oxygen of a heat supply drain tank according to claim 1, characterized in that a drain port of the main heat exchanger is connected with a drain main pipe through a pipeline, the drain main pipe is connected with the drain tank through a pipeline, and a drain isolation door and a drain electric regulating door are respectively arranged on the pipeline between the drain port and the drain main pipe.
6. The system for solving the problem of exceeding dissolved oxygen of a heat supply drain tank according to claim 1, wherein a critical draining electric door is arranged in a pipeline between a drain port on the main heat exchanger and a pressurized drain main pipe.
7. The system for solving the problem of exceeding dissolved oxygen of a heat supply drain tank according to claim 1, wherein the main heat exchanger comprises a No. 1 main heat exchanger, a No. 2 main heat exchanger and a No. 3 main heat exchanger.
8. The system for solving the problem of exceeding dissolved oxygen of a heat supply drain tank according to claim 1, wherein a heat preservation layer is wrapped on a heating pipe between a heat supply steam main pipe and the drain tank, and the heat preservation layer is formed by wrapping a foam layer and an aluminum skin.
9. The system for solving the problem of exceeding dissolved oxygen in a heat supply drain tank according to claim 1, wherein the heating coil is arranged at a position with an elevation of 0.5m at the bottom of the drain tank.
10. The system for solving the problem of exceeding dissolved oxygen of a heat supply drain tank according to claim 1, wherein the heating coil is in a shape of a Chinese character 'mi', the middle part of the heating coil in the shape of a Chinese character 'mi' is connected with the heating pipe, the eight end points of the heating coil in the shape of a Chinese character 'mi' are connected with each other to form an ellipse, the end parts of the heating coil in the shape of a Chinese character 'mi' are connected with each other through an ellipse pipe, and the lower ends of the ellipse pipe and the heating coil in the shape of a Chinese character 'mi' are respectively and uniformly connected with the atomizing nozzles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321672916.2U CN220287548U (en) | 2023-06-29 | 2023-06-29 | System for solve heat supply drain tank dissolved oxygen and exceed standard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321672916.2U CN220287548U (en) | 2023-06-29 | 2023-06-29 | System for solve heat supply drain tank dissolved oxygen and exceed standard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220287548U true CN220287548U (en) | 2024-01-02 |
Family
ID=89328963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321672916.2U Active CN220287548U (en) | 2023-06-29 | 2023-06-29 | System for solve heat supply drain tank dissolved oxygen and exceed standard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220287548U (en) |
-
2023
- 2023-06-29 CN CN202321672916.2U patent/CN220287548U/en active Active
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