CN215676546U - Novel indirect air cooling tower emergency water draining device - Google Patents
Novel indirect air cooling tower emergency water draining device Download PDFInfo
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- CN215676546U CN215676546U CN202121617878.1U CN202121617878U CN215676546U CN 215676546 U CN215676546 U CN 215676546U CN 202121617878 U CN202121617878 U CN 202121617878U CN 215676546 U CN215676546 U CN 215676546U
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Abstract
The utility model discloses a novel indirect air cooling tower emergency water draining device which comprises a water inlet branch pipe and a water outlet branch pipe, wherein the water inlet branch pipe is connected with a water inlet end of a cooling triangle of an air cooling tower sector, the water outlet branch pipe is connected with a water outlet end of the cooling triangle of the air cooling tower sector, a first emergency water draining valve and a second emergency water draining valve are further arranged, one end of the first emergency water draining valve is communicated with the water inlet branch pipe, the other end of the first emergency water draining valve is connected to a water storage tank, one end of the second emergency water draining valve is communicated with the water outlet branch pipe, and the other end of the second emergency water draining valve is connected to the water storage tank. Compared with the prior art, the emergency water draining system can ensure the rapidity and the reliability of emergency water draining, avoid the condition that the unit is shut down due to the fact that the water draining valve is opened by misoperation, and ensure the normal operation of power plant equipment.
Description
Technical Field
The utility model relates to a novel indirect air cooling tower emergency water draining device, and belongs to the technical field of thermal power equipment.
Background
The principle of generating kinetic energy by a steam turbine of a thermal power plant is to adopt a Carnot cycle with water as a working medium, and the efficiency of the Carnot cycle depends on the temperature difference between a heat source and a cold source. In northern areas of China with rich coal and water, an indirect air cooling system or a direct air cooling system is generally adopted as a cold source for saving water, but in northern areas, the temperature is extremely low in winter, and the requirement on freezing prevention of an outdoor cooling tube bundle of the indirect air cooling system is extremely strict.
The emergency drain valve is a valve with the highest requirement on safety and reliability in the indirect air cooling system, and is arranged on a pipeline connecting the underground water storage tank and the indirect air cooling circulating water system. When the indirect air cooling system normally operates, the valve is closed, and circulating water is circularly cooled in the indirect air cooling system. When the indirect air cooling system runs in winter, the risk that the air cooling radiator is frozen and damaged due to sudden stop of a circulating water pump, too low temperature of circulating water and the like occurs, the valve needs to be opened quickly according to an instruction given by the control system, and the water in the circulating water system is ensured to be drained into the underground water storage tank quickly. Once the valve is opened, the indirect air cooling system is forced to be shut down to cause the generator set to be shut down, and each abnormal shut down has great influence on the power plant, so that great loss is caused. Therefore, the emergency water escape valve is required to have extremely high reliability when the indirect air cooling system normally operates, and false operation and valve opening are guaranteed not to occur. And when the device needs to be opened, the device can be quickly and reliably opened so as to protect the intercooling system equipment from being frozen and damaged.
The emergency water drainage scheme adopted by most power plants at present is as follows: a hydraulic control drop hammer type emergency water drain valve is arranged between a main circulating water pipeline of a cooling system and an underground water storage tank, when the whole plant loses power, an electromagnetic valve of the hydraulic control system loses power, after oil pressure is lost due to oil drainage, a drop hammer is arranged, a valve is opened to drain water to the whole tower, and a radiator is protected from freezing loss. The problem that this scheme exists at present is that there is the malfunction risk in the hydraulic control system, when not having the risk of preventing frostbite, if the solenoid valve loses the electricity or the malfunction can lead to valve oil pressure system pressure release valve to open, leads to the shut down accident. Similar accidents occur in a plurality of current commissioning power plants, for example, a cable of an electromagnetic valve of the Shendong power plant is accidentally torn off to stop the whole plant, and a power supply switching process of the Dongming plastic power plant causes the emergency drain valve to be opened in a power-losing mode. Therefore, when a plurality of power plants run in winter, the drop hammer type emergency drain valve is also locked by cable, so that the drop hammer type emergency drain valve can not act under any condition, and if the risk of freezing prevention exists, an alarm is given, and the emergency drain valve is operated manually, so that the configured emergency drain valve is similar to a nominal one.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a novel indirect air cooling tower emergency water draining device which can ensure the rapidity and the reliability of emergency water draining, avoid the condition that a water draining valve is opened by misoperation to cause unit shutdown, and ensure the normal operation of power plant equipment.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the utility model provides a novel urgent sluicing of indirect air cooling tower device, includes water inlet branch pipe and water outlet branch pipe, water inlet branch pipe is connected with the triangle end of intaking of air cooling tower sector cooling, water outlet branch pipe is connected with the triangle end of water outlet of air cooling tower sector cooling, still is equipped with first urgent sluicing valve and the urgent sluicing valve of second, the one end of first urgent sluicing valve is linked together with the branch pipe of intaking, the other end of first urgent sluicing valve is connected to the storage water tank, the one end and the water outlet branch pipe of the urgent sluicing valve of second are linked together, the other end of the urgent sluicing valve of second is connected to the storage water tank.
Further, still be equipped with into water trunk line, delivery trunk line, urgent outlet valve of third and the urgent outlet valve of fourth, a plurality of inlet branch pipes are linked together with the trunk line of intaking respectively, a plurality of outlet branch pipes are linked together with the delivery trunk line respectively, the one end and the inlet trunk line of the urgent outlet valve of third are linked together, the other end of the urgent outlet valve of third is connected to the storage water tank, the one end and the delivery trunk line of the urgent outlet valve of fourth are linked together, the other end of the urgent outlet valve of fourth is connected to the storage water tank.
Preferably, the number of the first emergency drain valves and the second emergency drain valves is 10 respectively, and the first emergency drain valves and the second emergency drain valves are respectively arranged on the water inlet branch pipe and the water outlet branch pipe of the cooling triangle of the 10 air cooling tower sectors.
Preferably, the pipe diameters of the first emergency drain valve and the second emergency drain valve are not less than DN 400.
Furthermore, the first emergency drain valve, the second emergency drain valve, the third emergency drain valve and the fourth emergency drain valve are all electrically operated valves.
Preferably, the electric valve has a quick opening function, and the opening time of the electric valve is not more than 15 seconds.
Further, the power supply of the electric valve is an EPS power supply system.
Furthermore, the EPS power supply system is connected with a mains supply power supply line and a storage battery power supply line, the electric valve is powered by mains supply during normal work, and the storage battery supplies power to the electric valve after inversion when the mains supply fails.
Preferably, the power supply switching time of the EPS power supply system is not more than 5 ms.
Compared with the prior art, the emergency water drainage valve is arranged on the water inlet and outlet pipeline of each air cooling tower sector cooling triangle, so that the independent emergency water drainage can be carried out on each air cooling tower sector cooling triangle. When the anti-freezing protection needs to drive the emergency water drainage, all the emergency water drainage valves are driven to be opened, and even if individual valves cannot be opened, the completion of the water drainage of the whole tower is not influenced, so that the rapidity and the reliability of the emergency water drainage are ensured. All emergency drain valves are driven to be opened by the EPS continuous uninterrupted power device, the condition that the unit is shut down due to the fact that the drain valves are opened by misoperation can be avoided, and normal operation of power plant equipment is guaranteed.
Drawings
Fig. 1 is a schematic structural view of embodiment 1 of the present invention.
Fig. 2 is a schematic structural diagram of a cooling triangle of a sector of an air cooling tower in embodiment 1 of the present invention.
Fig. 3 is an enlarged schematic view of a structure at a in fig. 1.
Fig. 4 is a power supply system diagram of an EPS power supply system according to embodiment 1 of the utility model.
Shown in the figure: the device comprises a water inlet branch pipe 1, a water outlet branch pipe 2, an air cooling tower sector cooling triangle 3, a first emergency drain valve 4, a second emergency drain valve 5, a water storage tank 6, a sector water inlet valve 7, a sector water outlet valve 8, a main water inlet pipe 9, a main water outlet pipe 10, a third emergency drain valve 11, a fourth emergency drain valve 12, a bypass valve 13, a battery pack 14, a charger 15, an inverter 16, a power distribution cabinet 17, an alternating current input switch 18, an alternating current power supply 19, an overhaul switch 20, a battery switch 21, an inversion static switch 22, an output switch 23 and an input static switch 24.
Detailed Description
Preferred embodiments of the present invention are described in detail below.
Example 1: referring to fig. 1 to 4, which are schematic structural diagrams of embodiment 1 of the present invention, a novel indirect air cooling tower emergency water draining device includes a water inlet branch pipe 1 and a water outlet branch pipe 2, where the water inlet branch pipe 1 is connected to a water inlet end of an air cooling tower sector cooling triangle 3, the water outlet branch pipe 2 is connected to a water outlet end of the air cooling tower sector cooling triangle 3, and a first emergency water draining valve 4 and a second emergency water draining valve 5 are further provided, one end of the first emergency water draining valve 4 is communicated with the water inlet branch pipe 1, the other end of the first emergency water draining valve 4 is connected to a water storage tank 6, one end of the second emergency water draining valve 5 is communicated with the water outlet branch pipe 2, and the other end of the second emergency water draining valve 5 is connected to the water storage tank 6. A bypass valve 13 is also provided, and the bypass valve 13 is used for connecting the water inlet branch pipe 1 and the water outlet branch pipe 2. Still be equipped with sector inlet valve 7 on the inlet tube of every air cooling tower sector cooling triangle 3, still be equipped with sector outlet valve 8 on the outlet pipe of every air cooling tower sector cooling triangle 3, when needs sluicing, can close sector inlet valve 7 and sector outlet valve 8 with artifical or automatic mode, open first urgent outlet valve 4 and second urgent outlet valve 5 with artifical or automatic mode again, discharge the ponding of air cooling tower sector cooling triangle 3 inside to storage water tank 6. The emergency drain valve is arranged on the water inlet and outlet pipeline of each air cooling tower sector cooling triangle 3, so that the indirect air cooling system sectors can be partially or wholly withdrawn in the normal operation of the system, and the anti-freezing purpose is achieved under the condition of not wholly stopping the system.
Further, still be equipped with into water main pipe 9, the trunk line of going out 10, the urgent outlet valve 11 of third and the urgent outlet valve 12 of fourth, a plurality of inlet branch pipes 1 are linked together with the trunk line of going into water 9 respectively, a plurality of outlet branch pipes 2 are linked together with the trunk line of going out 10 respectively, the one end of the urgent outlet valve 11 of third is linked together with the trunk line of going into water 9, the other end of the urgent outlet valve 11 of third is connected to storage water tank 6, the one end and the trunk line of going out 10 of the urgent outlet valve 12 of fourth are linked together, the other end of the urgent outlet valve 12 of fourth is connected to storage water tank 6. When water is required to be drained, the main water inlet valve and the main water outlet valve can be closed manually or automatically, the third emergency drain valve 11 and the fourth emergency drain valve 12 are opened manually or automatically, accumulated water in the main water inlet and outlet pipe 10 is drained to the water storage tank 6, and the main water inlet and outlet pipe 10 can be prevented from being frozen at low temperature. Preferably, the number of the first emergency drain valves 4 and the second emergency drain valves 5 is 10, and the first emergency drain valves and the second emergency drain valves are respectively arranged on the water inlet branch pipe 1 and the water outlet branch pipe 2 of the 10 air cooling tower sector cooling triangles 3. Of course, if the air cooling tower has more sector cooling triangles, more emergency drain valves can be arranged. Preferably, the pipe diameters of the first emergency drain valve 4 and the second emergency drain valve 5 are preferably not less than DN400, and compared with the prior art, the pipe diameter of the drain valve is increased, so that the drain pipe is also used as an emergency drain pipe, and rapid draining is facilitated during emergency draining.
Further, the first emergency drain valve 4, the second emergency drain valve 5, the third emergency drain valve 11 and the fourth emergency drain valve 12 are all electrically operated valves, and the electrically operated valves can conveniently realize automatic control. The electric valve has a quick opening function, the opening time of the electric valve is not more than 15 seconds, and a power supply of the electric valve is an EPS power supply system.
As shown in fig. 4, fig. 4 is a power supply system diagram of the EPS power supply system. The EPS power supply system comprises a battery pack 14, a charger 15, an inverter 16 and a power distribution cabinet 17, wherein the input end of the charger 15 is connected to an alternating current power supply 19 through an alternating current input switch 18, the power distribution cabinet 17 is connected to the alternating current power supply 19 through an overhaul switch 20, the output end of the charger 15 is connected to the battery pack 14 through a battery switch 21, the battery pack 14 is further connected to the inverter 16, the inverter 16 is connected to the power distribution cabinet 17 through an inversion static switch 22 and an output switch 23, and the alternating current power supply 19 is connected to the power distribution cabinet 17 through the alternating current input switch 18, an input static switch 24 and the output switch 23. The power distribution cabinet 17 is internally provided with a plurality of groups of valve control circuits, and the valve control circuits are connected to the first emergency drain valve 4, the second emergency drain valve 5, the third emergency drain valve 11, the fourth emergency drain valve 12 and other electric valves. The EPS power supply system is connected with a mains supply power supply line and a storage battery power supply line, the mains supply supplies power to the electric valve during normal work, and the storage battery supplies power to the electric valve after inversion when the mains supply fails. And the power supply switching time of the EPS power supply system is not more than 5 ms. When the main machine is overhauled, the main machine is powered by mains supply through the overhaul switch 20. When the working condition of power loss of the whole plant occurs, the power supply to the storage battery can be quickly switched, and the power supply reliability is ensured. The emergency water release valve of each sector is driven by EPS continuous power supply, and the reliability of preventing misoperation and refusing operation is higher than that of the traditional hydraulic control drop hammer emergency water release valve.
The emergency water drain valve is driven by EPS continuous power supply, and the water drain valve of each sector is provided with an emergency water drain function instead of two hydraulic control drop hammer emergency water drain valves arranged on a main circulating water pipeline. The comparison between the technical scheme of the utility model and the prior art is as follows:
when the valve is used, the valves can be controlled to be opened and closed manually or automatically. When the air cooling tower sector cooling triangle 3 is drained, the sector water inlet valve 7 and the sector water outlet valve 8 can be closed manually or automatically, the first emergency drain valve 4 and the second emergency drain valve 5 are opened manually or automatically, and accumulated water in the air cooling tower sector cooling triangle 3 is drained to the water storage tank 6. When the main pipeline is drained, the main water inlet valve and the main water outlet valve can be closed manually or automatically, the third emergency drain valve 11 and the fourth emergency drain valve 12 are opened manually or automatically, and accumulated water in the main inlet and outlet pipeline 10 is drained to the water storage tank 6. The cooling triangles 3 of the sectors of the air cooling towers can be drained one by one, and then the main pipeline is drained.
According to the utility model, the emergency water drain valve is arranged on the water inlet and outlet pipeline of each air cooling tower sector cooling triangle 3, so that the independent emergency water drain can be carried out on each air cooling tower sector cooling triangle 3. Because the emergency water escape valve is large in quantity and small in caliber, the quick opening can be realized by increasing the torque of the actuating mechanism through electric drive. When the anti-freezing protection needs to drive the emergency water drainage, all the emergency water drainage valves are driven to be opened, and even if individual valves cannot be opened, the completion of the water drainage of the whole tower is not influenced, so that the rapidity and the reliability of the emergency water drainage are ensured. All the emergency drain valves are driven to be opened by the EPS continuous uninterrupted power device, so that the condition that the unit is shut down due to the fact that the drain valves are opened by misoperation can be avoided, and normal operation of power plant equipment is guaranteed.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications are all within the scope of the present invention.
Claims (9)
1. The utility model provides a novel urgent sluicing of indirect air cooling tower device, includes water inlet branch pipe (1) and play water branch pipe (2), water inlet branch pipe (1) is connected with the end of intaking of air cooling tower sector cooling triangle (3), play water branch pipe (2) is connected with the play water end of air cooling tower sector cooling triangle (3), its characterized in that: still be equipped with first urgent outlet valve (4) and the urgent outlet valve of second (5), the one end and the branch pipe of intaking (1) of first urgent outlet valve (4) are linked together, the other end of first urgent outlet valve (4) is connected to storage water tank (6), the one end and the branch pipe of play (2) of the urgent outlet valve of second (5) are linked together, the other end of the urgent outlet valve of second (5) is connected to storage water tank (6).
2. The novel indirect air cooling tower emergency water draining device according to claim 1, characterized in that: still be equipped with into water main pipe (9), play water main pipe (10), urgent outlet valve of third (11) and the urgent outlet valve of fourth (12), a plurality of root branch pipes of intaking (1) are linked together with the main pipe of intaking (9) respectively, a plurality of outlet pipe (2) are linked together with outlet pipe (10) respectively, the one end and the main pipe of intaking (9) of the urgent outlet valve of third (11) are linked together, the other end of the urgent outlet valve of third (11) is connected to storage water tank (6), the one end and the play water main pipe of the urgent outlet valve of fourth (12) are linked together, the other end of the urgent outlet valve of fourth (12) is connected to storage water tank (6).
3. The novel indirect air cooling tower emergency water draining device according to claim 1, characterized in that: the number of the first emergency drain valves (4) and the second emergency drain valves (5) is respectively 10, and the first emergency drain valves and the second emergency drain valves are respectively arranged on the water inlet branch pipes (1) and the water outlet branch pipes (2) of the cooling triangles (3) of the sectors of the 10 air cooling towers.
4. The novel indirect air cooling tower emergency water draining device as claimed in claim 1 or claim 2, wherein: the pipe diameters of the first emergency drain valve (4) and the second emergency drain valve (5) are not less than DN 400.
5. The novel indirect air cooling tower emergency water draining device as claimed in claim 1 or claim 2, wherein: the first emergency drain valve (4), the second emergency drain valve (5), the third emergency drain valve (11) and the fourth emergency drain valve (12) are all electrically operated valves.
6. The novel indirect air cooling tower emergency water draining device as claimed in claim 5, wherein: the electric valve has a quick opening function, and the opening time of the electric valve is not more than 15 seconds.
7. The novel indirect air cooling tower emergency water draining device as claimed in claim 5, wherein: and the power supply of the electric valve is an EPS power supply system.
8. The novel indirect air cooling tower emergency water draining device according to claim 7, wherein: the EPS power supply system is connected with a mains supply power supply line and a storage battery power supply line, the electric valve is powered by mains supply during normal work, and the storage battery supplies power to the electric valve after inversion when the mains supply fails.
9. The novel indirect air cooling tower emergency water draining device according to claim 8, wherein: and the power supply switching time of the EPS power supply system is not more than 5 ms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121617878.1U CN215676546U (en) | 2021-07-15 | 2021-07-15 | Novel indirect air cooling tower emergency water draining device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121617878.1U CN215676546U (en) | 2021-07-15 | 2021-07-15 | Novel indirect air cooling tower emergency water draining device |
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| Publication Number | Publication Date |
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| CN215676546U true CN215676546U (en) | 2022-01-28 |
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| CN202121617878.1U Active CN215676546U (en) | 2021-07-15 | 2021-07-15 | Novel indirect air cooling tower emergency water draining device |
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2021
- 2021-07-15 CN CN202121617878.1U patent/CN215676546U/en active Active
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