CN220002849U - Anti-freezing device for fire-fighting water system of thermal power plant - Google Patents
Anti-freezing device for fire-fighting water system of thermal power plant Download PDFInfo
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- CN220002849U CN220002849U CN202320832670.4U CN202320832670U CN220002849U CN 220002849 U CN220002849 U CN 220002849U CN 202320832670 U CN202320832670 U CN 202320832670U CN 220002849 U CN220002849 U CN 220002849U
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- pressure steam
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 108
- 238000007710 freezing Methods 0.000 title claims abstract description 27
- 238000009833 condensation Methods 0.000 claims abstract description 8
- 230000005494 condensation Effects 0.000 claims abstract description 8
- 230000000737 periodic effect Effects 0.000 claims description 5
- 238000002955 isolation Methods 0.000 claims description 3
- 230000008014 freezing Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 239000002918 waste heat Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 206010060904 Freezing phenomenon Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Abstract
The utility model discloses an anti-freezing device for a fire water system of a thermal power plant, the fire water system comprises a fire water tank and a plurality of fire water pipes connected to the fire water tank, the anti-freezing device comprises: the low-pressure steam source, a plurality of steam pipelines, temperature measuring elements and a temperature controller, wherein the steam pipelines are connected between the low-pressure steam source and the fire-fighting water tank, each steam pipeline is provided with an automatic control adjusting valve and a manual isolating valve, the automatic control adjusting valve is electrically connected with the temperature controller, the temperature measuring elements are arranged inside the fire-fighting water tank and are electrically connected with the temperature controller, the temperature controller controls the automatic control adjusting valve to be opened or closed according to the temperature of fire-fighting water in the fire-fighting water tank obtained by measuring the temperature measuring elements, and low-pressure steam in the low-pressure steam source is led into the fire-fighting water tank, so that the water temperature in the fire-fighting water tank is constant above a condensation point.
Description
Technical Field
The utility model belongs to the technical field of fire control of thermal power plants, and particularly relates to an anti-freezing device for a fire water system of a thermal power plant.
Background
The thermal power plant consists of a plurality of systems, the production process is complex, a plurality of combustible and inflammable substances exist in the thermal power plant, and the possibility of fire occurrence is high, so that the requirements on the operation reliability of the fire-fighting system of the thermal power plant are high, and the equipment such as an alarm device of the fire-fighting system, the fire-fighting water system and the like must be kept in an intact state all the time. In winter in cold areas, when the ambient temperature is lower than 3 ℃, abnormal conditions such as freezing of fire-fighting water system pipelines, freezing damage of fire-fighting water system valves and the like frequently occur, so that the fire-fighting water system of the thermal power plant stops running. Fig. 1 is a schematic structural diagram of a fire-fighting water system of an existing thermal power plant, as shown in fig. 1, water in a fire-fighting water tank 1 of the thermal power plant is led out by a fire-fighting water pipe 2 after being pressurized and is connected to fire hydrants arranged at various positions in a plant area, and if the fire-fighting water pipe 2 is frozen, serious potential safety hazards can be brought to production of the thermal power plant. At present, a fire water circulation mode is frequently adopted in a thermal power plant for a long time so as to avoid freezing of fire water pipelines in winter, and the fire water pipeline freezing mode not only causes a large amount of fire water loss, but also has high energy consumption.
Disclosure of Invention
In view of the defects in the prior art, the utility model provides an anti-freezing device for a fire-fighting water system of a thermal power plant, so as to solve the problem of how to avoid freezing of a fire-fighting pipeline.
In order to solve the above problems, the present utility model provides an anti-freezing apparatus for a fire water system of a thermal power plant, the fire water system including a fire water tank and a plurality of fire water pipes connected to the fire water tank, the anti-freezing apparatus comprising: the fire-fighting water tank comprises a low-pressure steam source, a plurality of steam pipelines, a temperature measuring element and a temperature controller, wherein the steam pipelines are connected between the low-pressure steam source and the fire-fighting water tank, each steam pipeline is provided with an automatic control adjusting valve and a manual isolating valve, the automatic control adjusting valve is electrically connected with the temperature controller, and the temperature measuring element is arranged inside the fire-fighting water tank and is electrically connected with the temperature controller.
The temperature controller controls the automatic control adjusting valve to be opened or closed according to the temperature of fire water in the fire water tank, which is measured and acquired by the temperature measuring element, and introduces low-pressure steam in the low-pressure steam source into the fire water tank so that the water temperature in the fire water tank is constant above a condensation point; the low-pressure steam in the low-pressure steam source is sourced from one or more than two of a continuous blowdown device, a periodic blowdown device and a steam drainage pipeline in a thermal power plant.
Preferably, the air-exposed portion of the fire hose is covered with a plastic protection layer around which a plurality of bands are wound.
According to the anti-freezing device for the fire water system of the thermal power plant, based on an anti-freezing concept that the water temperature of fire water is kept constant above the condensation point by introducing low-pressure steam into the fire water system of the thermal power plant, a plurality of steam pipelines, a temperature measuring element and a temperature controller are adopted, automatic control regulating valves are arranged on the steam pipelines, when the environmental temperature in winter is lower than 3 ℃, the temperature measuring element measures the water temperature in the fire water tank and feeds back the measured result to the temperature controller, the temperature controller controls the automatic control regulating valves on the steam pipelines to open low-pressure steam introduced into the fire water tank according to temperature measurement information, the low-pressure steam can enable the water temperature in the fire water tank to be kept above the condensation point, so that fire water can circulate in the fire water pipe of the thermal power plant, the fire water pipeline of the thermal power plant is prevented from being frozen, the whole fire water system is prevented from being frozen, meanwhile, the low-pressure steam of the plurality of steam pipelines is from the original continuous pollution discharge device, periodic pollution discharge device and steam drainage pipeline in the thermal power plant, and redundant steam in the steam drainage pipeline are introduced into the fire water system of the fire water plant to be not only, and the waste heat of the fire water system is prevented from being frozen, and the waste heat of the fire water system is not stopped, and the power plant is not used.
Drawings
FIG. 1 is a schematic diagram of a fire water system of a prior art thermal power plant;
fig. 2 is a schematic structural diagram of an anti-freezing device according to an embodiment of the present utility model.
Detailed Description
In order to make the objects, technical solutions and advantages of the present utility model more apparent, the following detailed description of the embodiments of the present utility model will be given with reference to the accompanying drawings. Examples of these preferred embodiments are illustrated in the accompanying drawings. The embodiments of the utility model shown in the drawings and described in accordance with the drawings are merely exemplary and the utility model is not limited to these embodiments.
It should be noted here that, in order to avoid obscuring the present utility model due to unnecessary details, only structures and/or processing steps closely related to the solution according to the present utility model are shown in the drawings, while other details not greatly related to the present utility model are omitted.
Fig. 2 is a schematic structural diagram of an anti-freezing device according to an embodiment of the present utility model, as shown in fig. 2, where the anti-freezing device includes: the fire-fighting water tank comprises a low-pressure steam source 3, a plurality of steam pipelines 4, a temperature measuring element 5 and a temperature controller 6, wherein the steam pipelines 4 are connected between the low-pressure steam source 3 and the fire-fighting water tank 1, an automatic control adjusting valve 7 and a manual isolating valve 8 are arranged on each steam pipeline 4, the automatic control adjusting valve 7 is electrically connected with the temperature controller 6, and the temperature measuring element 5 is arranged inside the fire-fighting water tank 1 and is electrically connected with the temperature controller 6.
The temperature controller 6 controls the automatic control adjusting valve 7 to be opened or closed according to the temperature of fire water in the fire water tank 1 measured and acquired by the temperature measuring element 5, and introduces low-pressure steam in the low-pressure steam source 3 into the fire water tank 1 so that the water temperature in the fire water tank 1 is constant above a condensation point; the low-pressure steam in the low-pressure steam source 3 is sourced from one or more than two of a continuous blowdown device, a periodic blowdown device and a steam drain pipeline in a thermal power plant.
Specifically, when the environmental temperature in winter is lower than 3 ℃, the manual isolation valve 8 is opened, the temperature measuring element 4 measures the water temperature in the fire-fighting water tank 1 and feeds back the measured result to the temperature controller 5, the temperature controller 5 controls the opening of the automatic control regulating valve 6 on the steam pipeline 3 according to the temperature measuring information, low-pressure steam introduced into the fire-fighting water tank, the temperature of the low-pressure steam can enable the water temperature in the fire-fighting water tank 1 to be constant above the condensation point, so that fire water can circulate in the fire-fighting water pipe 2, the fire-fighting water pipeline 2 in the fire-fighting water system of a thermal power plant and the valves on the fire-fighting water pipeline 2 are prevented from being frozen, and the whole fire-fighting water system is prevented from being frozen and stopped.
In the whole low-pressure steam introducing process, the temperature controller 5 automatically controls the low-pressure steam quantity introduced into the fire-fighting water tank by the regulating valve 6 according to the water temperature control in the fire-fighting water tank 1, and always keeps the water temperature in the fire-fighting water tank 1 constant above the condensation point. And the low-pressure steam in the low-pressure steam source 3 is sourced from one or more than two of a continuous blow-down device, a periodic blow-down device and a steam drainage pipeline in a thermal power plant, so that the freezing phenomenon of the fire-fighting pipeline 2 in a fire-fighting water system of the thermal power plant is prevented, and meanwhile, the power generation waste heat of the thermal power plant is effectively utilized, and the thermal working medium loss is avoided.
When the anti-freezing device is not used for a long time during overhauling of a fire water system of a thermal power plant or in a period of high ambient temperature, the manual isolation valve 8 is turned off to isolate the anti-freezing device, so that the purposes of safely isolating the system and preventing thermal working medium loss are achieved.
Specifically, the part of the fire-fighting water pipe 2 exposed to the air is covered with a plastic protection layer, a plurality of binding tapes are wound on the plastic protection layer, and the plastic protection layer can play a role in further heat preservation.
In summary, the embodiment of the utility model provides the anti-freezing device for the fire water system of the thermal power plant, which introduces low-pressure steam into the fire water system of the thermal power plant to enable the water temperature of the fire water to be constant above the freezing point, thereby avoiding the fire pipe of the fire water system of the thermal power plant from freezing and effectively preventing the fire water system of the thermal power plant from freezing and stopping operation.
The foregoing is merely illustrative of the embodiments of this utility model and it will be appreciated by those skilled in the art that variations and modifications may be made without departing from the principles of the utility model, and it is intended to cover all modifications and variations as fall within the scope of the utility model.
Claims (2)
1. An anti-freezing device for a fire water system of a thermal power plant, the fire water system comprising a fire water basin (1) and a plurality of fire water pipes (2) connected to the fire water basin (1), characterized in that the anti-freezing device comprises: the fire-fighting water tank comprises a low-pressure steam source (3), a plurality of steam pipelines (4), a temperature measuring element (5) and a temperature controller (6), wherein the steam pipelines (4) are connected between the low-pressure steam source (3) and the fire-fighting water tank (1), an automatic control adjusting valve (7) and a manual isolation valve (8) are arranged on each steam pipeline (4), the automatic control adjusting valve (7) is electrically connected with the temperature controller (6), and the temperature measuring element (5) is arranged inside the fire-fighting water tank (1) and is electrically connected with the temperature controller (6);
the temperature controller (6) controls the automatic control adjusting valve (7) to be opened or closed according to the temperature of fire water in the fire water tank (1) measured and acquired by the temperature measuring element (5), and introduces low-pressure steam in the low-pressure steam source (3) into the fire water tank (1) so that the water temperature in the fire water tank (1) is constant above a condensation point; the low-pressure steam in the low-pressure steam source (3) is sourced from one or more than two of a continuous blowdown device, a periodic blowdown device and a steam drain pipeline in a thermal power plant.
2. The anti-freezing device of fire water system of thermal power plant according to claim 1, characterized in that the part of the fire water pipe (2) exposed to air is covered with a plastic protection layer, on which a plurality of ties are wound.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320832670.4U CN220002849U (en) | 2023-04-14 | 2023-04-14 | Anti-freezing device for fire-fighting water system of thermal power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320832670.4U CN220002849U (en) | 2023-04-14 | 2023-04-14 | Anti-freezing device for fire-fighting water system of thermal power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220002849U true CN220002849U (en) | 2023-11-14 |
Family
ID=88679501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320832670.4U Active CN220002849U (en) | 2023-04-14 | 2023-04-14 | Anti-freezing device for fire-fighting water system of thermal power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220002849U (en) |
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2023
- 2023-04-14 CN CN202320832670.4U patent/CN220002849U/en active Active
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