CN219890214U - Circulating water one-machine two-tower operation system - Google Patents
Circulating water one-machine two-tower operation system Download PDFInfo
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- CN219890214U CN219890214U CN202320301923.5U CN202320301923U CN219890214U CN 219890214 U CN219890214 U CN 219890214U CN 202320301923 U CN202320301923 U CN 202320301923U CN 219890214 U CN219890214 U CN 219890214U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 253
- 238000001816 cooling Methods 0.000 claims abstract description 77
- 230000005540 biological transmission Effects 0.000 claims description 11
- 230000001502 supplementing effect Effects 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 6
- 239000003245 coal Substances 0.000 abstract description 4
- 238000010248 power generation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Abstract
The utility model discloses a circulating water one-machine two-tower operation system, which comprises two groups of indirect air cooling tower units and a DCS control module, wherein each indirect air cooling tower unit comprises an air cooling tower, a circulating water pump and a condenser; the condenser is connected with a water inlet of the circulating water pump, and a water outlet of the circulating water pump is connected with the air cooling tower; the air cooling tower is connected with the condenser through a circulating water return pipeline; and a connecting pipeline is arranged between the two groups of indirect air cooling tower units, and the two groups of indirect air cooling tower units are controlled to be communicated through a communication electric door. The utility model adopts a mode of 'stop without stopping the tower, one machine with two towers', when one machine set needs to be overhauled, the other machine set can convey circulating water into the cooling sectors of the two groups of air cooling towers, thereby increasing the utilization rate of the cooling sectors. Especially in summer, when the back pressure of the unit is increased to be full load due to the weather of continuous high temperature of the ambient temperature, the utility model can reduce the back pressure of the unit, improve the economy of the unit and reduce the coal consumption.
Description
Technical Field
The utility model relates to the field of circulating water systems, in particular to a circulating water one-machine two-tower operation system.
Background
The indirect air cooling system is used in thermal power generation or chemical enterprises, and the steam after doing work in a steam turbine is required to be discharged into a condenser to be condensed into water and then returned to a boiler for recycling. The heat of the condenser is taken away by the circulating water, the circulating water exchanges heat with cold air in the air-cooled radiator, and finally the heat is released to the atmosphere, so that the system is generally in a single-machine single-cycle operation mode.
For example, in the chinese patent of the utility model with the grant publication number CN 211230570U and the grant publication date 2020.08.11, a generator set back pressure control circulating water system based on circulating water temperature is disclosed, which comprises a low pressure cylinder of a steam turbine, a condenser, a DCS control unit, an indirect air cooling tower, a power frequency circulating water pump and a variable frequency circulating water pump. The low-pressure cylinder of the steam turbine is connected with the condenser, the condenser is connected to the indirect air cooling tower through the power frequency circulating water pump or the variable frequency circulating water pump by the circulating water pipeline, and the indirect air cooling tower is connected to the condenser through the circulating water return pipeline. The generator and the power signal transmitter of the generator are connected with the temperature sensor of the circulating water pipeline inlet in a communication mode to a DCS control unit, and the DCS control unit controls the industrial variable-frequency circulating pump and the variable-frequency circulating pump. According to the utility model, the DCS control unit of the thermal generator set is used for controlling the frequency of the variable-frequency circulating water pump and the start and stop of the power frequency circulating pump, so that the circulating water flow of the condenser is automatically and continuously regulated, and the set is operated under the optimal economic back pressure.
However, when the environmental temperature in summer in the north is increased, the temperature of circulating water is limited, the cooling area is limited, and the back pressure of the unit is gradually increased; if a single machine unit single circulation mode is adopted, when a single machine unit is overhauled, the sector of the single machine unit is in a closed idle state, the back pressure of other running machine units is higher, the power generation coal consumption is increased, and the economic benefit of the machine unit is reduced.
Disclosure of Invention
In order to overcome the problems in the prior art, the utility model aims to provide a circulating water one-machine two-tower operation system, which utilizes a single machine overhaul opportunity to put the circulating water of an operation unit into an overhaul unit sector, increases the circulating water cooling area of the operation unit, realizes the operation of the circulating water one-machine two-tower operation, reduces the circulating water temperature of the operation unit, thereby reducing the back pressure of the operation unit, reducing the power generation coal consumption and improving the economic benefit of the unit.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the circulating water one-machine two-tower operation system comprises two groups of indirect air cooling tower units and a DCS control module, wherein each indirect air cooling tower unit comprises an air cooling tower, a circulating water pump and a condenser; the condenser is connected with a water inlet of the circulating water pump, and a water outlet of the circulating water pump is connected with the air cooling tower; the air cooling tower is connected with the condenser through a circulating water return pipeline;
and a connecting pipeline is arranged between the two groups of indirect air cooling tower units, and the two groups of indirect air cooling tower units are controlled to be communicated through a communication electric door.
The utility model is further provided with: the connecting pipeline comprises a circulating water pump inlet connecting pipeline, a circulating water pump outlet connecting pipeline and a circulating water return water connecting pipeline; the circulating water pump is respectively arranged between the inlet of the circulating water pump, the outlet of the circulating water pump and the circulating water return pipeline of the two groups of indirect air cooling tower units.
The utility model is further provided with: the communication electric door comprises a circulating water pump inlet communication electric door, a circulating water pump outlet communication electric door and a circulating water return communication electric door; the circulating water pump is respectively arranged on the inlet connecting pipeline, the outlet connecting pipeline and the circulating water return connecting pipeline of the circulating water pump.
The utility model is further provided with: the air cooling tower comprises an expansion water tank, an underground water storage tank and a cooling sector; liquid level sensors are arranged in the expansion water tank and the underground water storage tank.
The utility model is further provided with: the water outlet of the circulating water pump is connected with the cooling sector, and the cooling sector is connected with the condenser through a circulating water return pipeline; the underground water storage tank is internally provided with a transmission pump and a water supplementing pump, and the transmission pump and the water supplementing pump are connected with an expansion water tank and a circulating water return pipeline through pipelines.
The utility model is further provided with: when the circulating water one-machine two-tower operation system works, the water level of the expansion water tank is ensured to be not lower than 2900mm, and the water level of the underground water storage tank is ensured to be not lower than 1200mm.
The utility model is further provided with: the circulating water pumps of each group of indirect air cooling tower units are provided with two circulating water pumps, and one circulating water pump is a standby circulating water pump.
The utility model is further provided with: the circulating water pump, the liquid level sensor, the transmission pump, the water supplementing pump, the circulating water pump inlet connecting electric door, the circulating water pump outlet connecting electric door and the circulating water backwater connecting electric door are electrically connected with the DCS control module.
The utility model is further provided with: when the circulating water one-machine two-tower operation system works, one condenser is stopped, the other condenser operates, the circulating water pump inlet communication electric door, the circulating water pump outlet communication electric door and the circulating water return communication electric door are opened through the DCS control module, the circulating water pump sends circulating water into cooling sectors of two groups of air cooling towers for cooling, and the circulating water is conveyed back to the condenser through the circulating water return pipeline.
The purpose is that when one condenser unit needs to be overhauled, a 'stop-free tower and one machine with two towers' operation mode is adopted, so that the operation unit can convey circulating water into two groups of cooling sectors of the air cooling towers, and the utilization rate of the cooling sectors is increased.
In summary, the technical scheme of the utility model has the following beneficial effects:
1. the utility model adopts a mode of 'stop without stopping the tower, one machine with two towers', when one machine set needs to be overhauled, the other machine set can convey circulating water into the cooling sectors of the two groups of air cooling towers, thereby increasing the utilization rate of the cooling sectors. Especially in summer, when the back pressure of the unit is increased to be full load due to the weather of continuous high temperature of the ambient temperature, the utility model can reduce the back pressure of the unit, improve the economy of the unit and reduce the coal consumption.
2. The circulating water one-machine two-tower operation system has a simple structure and is stable to operate.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
FIG. 2 is a schematic diagram of an indirect air cooling tower unit structure according to the present utility model.
In the drawings, the list of components represented by the various numbers is as follows:
1001-one unit cooling sector, 1002-one unit expansion tank, 1003-one unit underground water storage tank, 1004-one unit transmission pump, 1005-one unit water supplementing pump, 1200-one unit condenser, 1301-one unit circulating water pump, 1302-one unit standby water pump, 2001-two unit cooling sector, 2200-two unit condenser, 2301-two unit circulating water pump, 2302-two unit standby water pump, 30-circulating water pump outlet 1 time contact electric door, 31-circulating water pump outlet 2 time contact electric door, 40-circulating water pump inlet 1 time contact electric door, 41-circulating water pump inlet 2 time contact electric door, 50-circulating water return 1 time contact electric door, 51-circulating water return 2 time contact electric door, 60-circulating water return pipeline.
Detailed Description
In order to make the technical solution of the present utility model better understood by those skilled in the art, the technical solution of the present utility model will be clearly and completely described in the following with reference to the accompanying drawings, and based on the embodiments of the present utility model, other similar embodiments obtained by those skilled in the art without making any inventive effort should be included in the scope of protection of the present utility model. In addition, directional words such as "upper", "lower", "left", "right", and the like, as used in the following embodiments are merely directions with reference to the drawings, and thus, the directional words used are intended to illustrate, not to limit, the utility model.
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 utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.
As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," and/or the like, specify the presence of stated features, integers, steps, operations, elements, components, or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof. Meanwhile, the term used in the present specification includes any and all combinations of the items listed in association.
The utility model will be further described with reference to the drawings and preferred embodiments.
Example 1:
as shown in FIG. 1, in the preferred embodiment of the utility model, the circulating water one-machine two-tower operation system comprises two groups of indirect air cooling tower units and a DCS control module, wherein the indirect air cooling tower units comprise an air cooling tower, a circulating water pump and a condenser; the condenser is connected with a water inlet of the circulating water pump, and a water outlet of the circulating water pump is connected with the air cooling tower; the air cooling tower is connected with the condenser through a circulating water return pipeline; the condenser outlet and inlet, the circulating water pump out, the inlet department all is provided with electric door, by DCS control module control.
And a connecting pipeline is arranged between the two groups of indirect air cooling tower units, and the two groups of indirect air cooling tower units are controlled to be communicated through a communication electric door.
The connecting pipeline comprises a circulating water pump inlet connecting pipeline, a circulating water pump outlet connecting pipeline and a circulating water return water connecting pipeline; the circulating water pump is respectively arranged between the inlet of the circulating water pump, the outlet of the circulating water pump and the circulating water return pipeline of the two groups of indirect air cooling tower units.
The communication electric door comprises a circulating water pump inlet 1 time communication electric door 40, a circulating water pump inlet 2 time communication electric door 41, a circulating water pump outlet 1 time communication electric door 30, a circulating water pump outlet 2 time communication electric door 31, a circulating water return 1 time communication electric door 50 and a circulating water return 2 time communication electric door 51; the circulating water pump is respectively arranged on the inlet connecting pipeline, the outlet connecting pipeline and the circulating water return connecting pipeline of the circulating water pump.
As shown in fig. 2, taking a unit as an example, the air cooling tower comprises a unit expansion water tank 1002, a unit underground water storage tank 1003 and a unit cooling sector 1001; the inside of the expansion water tank 1002 and the underground water tank 1003 are provided with liquid level sensors.
A water outlet of the unit circulating water pump 1301 is connected with the unit cooling sector 1001, and the unit cooling sector 1001 is connected with the unit condenser 1200 through a circulating water return pipeline; a transmission pump 1004 and a water supplementing pump 1005 are arranged in the unit underground water storage tank 1003, and the transmission pump 1004 and the water supplementing pump 1005 are connected with a unit expansion water tank 1002 and the circulating water return pipeline 60 through pipelines.
When the circulating water one-machine two-tower operation system works, the water level of the expansion water tank is ensured to be not lower than 2900mm, and the water level of the underground water storage tank is ensured to be not lower than 1200mm.
The circulating water pumps of each group of indirect air cooling tower units are provided with two circulating water pumps, and one circulating water pump is a standby circulating water pump.
The circulating water pump, the liquid level sensor, the transmission pump, the water supplementing pump, the circulating water pump inlet connecting electric door, the circulating water pump outlet connecting electric door and the circulating water backwater connecting electric door are electrically connected with the DCS control module.
When the circulating water one-machine two-tower operation system works, one condenser is stopped for maintenance, the other condenser operates, the circulating water pump inlet communication electric door, the circulating water pump outlet communication electric door and the circulating water return water communication electric door are opened through the DCS control module, the circulating water pump sends circulating water into cooling sectors of two groups of air cooling towers for cooling, and the circulating water is conveyed back to the condenser through the circulating water return pipeline.
The purpose is that when one condenser unit needs to be overhauled, a 'stop-free tower and one machine with two towers' operation mode is adopted, so that the operation unit can convey circulating water into two groups of cooling sectors of the air cooling towers, and the utilization rate of the cooling sectors is increased.
Example 2:
in order to apply the embodiment of the circulating water one-machine two-tower operation system, the operation of one machine unit is stopped and overhauled, and the operation of two machine units is as follows:
the electric door of the circulating water outlet and inlet of the condenser of the unit is closed, and the condenser is cut to the 'on-site' position and is powered off to prevent false opening;
the water level of expansion water tanks of the two groups of air cooling towers is not lower than 2900mm, and the water level of an underground water storage tank is not lower than 1200mm.
The DCS control module is used for opening the inlet 1 and 2 times of communication electric doors of the circulating water pump, the outlet 1 and 2 times of communication electric doors of the circulating water pump and the return 1 and 2 times of communication electric doors of the circulating water; circulating water is conveyed into two groups of air cooling towers through a circulating water pump;
maintaining the operation of the two sets of circulating water pumps, ensuring that the outlet pressure is more than 0.3MPa, and otherwise, starting the operation of the standby circulating water pumps;
if the water level of the cold expansion water tank has abnormal descending speed, the water supplementing pump, the transmission pump and the large demineralized water pump are started immediately to supplement water, the water level of the expansion water tank is maintained to be more than 2900mm, whether the water level of each sector is normal or not is checked, and whether leakage exists in a circulating water pipeline or not is checked;
if the expansion water tanks of the two units are rapidly lowered, two paths of water replenishing are immediately started, the circulating water pump, the circulating water inlet and the circulating water return contact door are closed, and the single-machine operation mode is recovered.
Finally, it should be noted that the above-mentioned examples only represent several embodiments of the utility model, which are described in more detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (10)
1. The circulating water one-machine two-tower operation system is characterized by comprising two groups of indirect air cooling tower units and a DCS control module, wherein each indirect air cooling tower unit comprises an air cooling tower, a circulating water pump and a condenser; the condenser is connected with a water inlet of the circulating water pump, and a water outlet of the circulating water pump is connected with the air cooling tower; the air cooling tower is connected with the condenser through a circulating water return pipeline;
and a connecting pipeline is arranged between the two groups of indirect air cooling tower units, and the two groups of indirect air cooling tower units are controlled to be communicated through a communication electric door.
2. The circulating water one-machine two-tower operation system according to claim 1, wherein the connecting pipeline comprises a circulating water pump inlet connecting pipeline, a circulating water pump outlet connecting pipeline and a circulating water return water connecting pipeline; the circulating water pump is respectively arranged between the inlet of the circulating water pump, the outlet of the circulating water pump and the circulating water return pipeline of the two groups of indirect air cooling tower units.
3. The circulating water one-machine two-tower operation system according to claim 2, wherein the communication electric door comprises a circulating water pump inlet communication electric door, a circulating water pump outlet communication electric door and a circulating water return communication electric door; the circulating water pump is respectively arranged on the inlet connecting pipeline, the outlet connecting pipeline and the circulating water return connecting pipeline of the circulating water pump.
4. The circulating water one-machine two-tower operation system according to claim 3, wherein the air cooling tower comprises an expansion tank, an underground water storage tank and a cooling sector.
5. The circulating water one-machine two-tower operation system according to claim 4, wherein a water outlet of the circulating water pump is connected with the cooling sector, and the cooling sector is connected with the condenser through a circulating water return pipeline; the underground water storage tank is internally provided with a transmission pump and a water supplementing pump, and the transmission pump and the water supplementing pump are connected with an expansion water tank and a circulating water return pipeline through pipelines.
6. The circulating water one-machine two-tower operation system according to claim 5, wherein the expansion water tank and the underground water storage tank are internally provided with a liquid level sensor.
7. The circulating water one-machine two-tower operation system according to claim 6, wherein when the circulating water one-machine two-tower operation system works, the water level of the expansion water tank is ensured to be not lower than 2900mm, and the water level of the underground water storage tank is ensured to be not lower than 1200mm.
8. The circulating water one-machine two-tower operation system according to claim 7, wherein two circulating water pumps of each group of indirect air cooling tower units are arranged, and one circulating water pump is a standby circulating water pump.
9. The circulating water one-machine two-tower operation system according to claim 8, wherein the circulating water pump, the liquid level sensor, the transmission pump, the water supplementing pump, the circulating water pump inlet communication electric door, the circulating water pump outlet communication electric door and the circulating water return communication electric door are electrically connected with the DCS control module.
10. The circulating water one-machine two-tower operation system according to claim 9, wherein when the circulating water one-machine two-tower operation system works, one condenser is stopped, the other condenser works, the circulating water pump inlet connecting electric door, the circulating water pump outlet connecting electric door and the circulating water return connecting electric door are opened through the DCS control module, the circulating water pump sends circulating water into cooling sectors of two groups of air cooling towers to cool, and the circulating water is conveyed back to the condenser through the circulating water return pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320301923.5U CN219890214U (en) | 2023-02-23 | 2023-02-23 | Circulating water one-machine two-tower operation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320301923.5U CN219890214U (en) | 2023-02-23 | 2023-02-23 | Circulating water one-machine two-tower operation system |
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| CN219890214U true CN219890214U (en) | 2023-10-24 |
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| CN202320301923.5U Active CN219890214U (en) | 2023-02-23 | 2023-02-23 | Circulating water one-machine two-tower operation system |
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