CN210570167U - Power station auxiliary machine cooling water system adopting high-level layout factory building - Google Patents
Power station auxiliary machine cooling water system adopting high-level layout factory building Download PDFInfo
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- CN210570167U CN210570167U CN201920725646.4U CN201920725646U CN210570167U CN 210570167 U CN210570167 U CN 210570167U CN 201920725646 U CN201920725646 U CN 201920725646U CN 210570167 U CN210570167 U CN 210570167U
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- 239000000498 cooling water Substances 0.000 title claims abstract description 84
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 95
- 238000001816 cooling Methods 0.000 claims abstract description 89
- 238000010438 heat treatment Methods 0.000 claims description 3
- 230000002706 hydrostatic effect Effects 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 230000001502 supplementing effect Effects 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005399 mechanical ventilation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Abstract
The embodiment of the utility model provides an adopt high-order power station auxiliary engine cooling water system who arranges the factory building relates to the thermal power field. The power station auxiliary machine cooling water system comprises a cooling tower, an auxiliary machine circulating water pump and an auxiliary machine cooling heat exchange device which are connected through pipelines to form a circulating loop, and further comprises an expansion water tank connected with an outlet pipeline of the auxiliary machine circulating water pump, wherein the expansion water tank is arranged at an outlet of the auxiliary machine circulating water pump. The cooling tower includes a plurality of cooling units, just two turbo generator set that the factory building was arranged to the high position correspond the cooling unit of auxiliary engine cooling tower is two rows and arranges, and a plurality of cooling unit cross arrangement of every unit is in two rows, and two liang of adjacent cooling units of two units. The utility model discloses power station auxiliary engine cooling water system has offset the influence of surrounding environment wind and direct air cooling fan crowd to auxiliary engine water-cooling tower furthest on arranging the mode.
Description
Technical Field
The utility model relates to a thermal power technology field specifically relates to an adopt high-order power station auxiliary engine cooling water system who arranges the factory building.
Background
During operation of a thermal power plant, a main machine and each main auxiliary machine in a main plant need a large amount of cooling water to ensure reliable operation. The existing conventional main plant equipment cooling system is mainly divided into an open cooling water system and a closed cooling water system. Open cooling water generally comes from the steam turbine circulating water, and closed cooling water generally comes from chemistry specialty demineralized water, and comparatively speaking, open cooling water quality of water is relatively poor, and impurity is also more, is applicable to the auxiliary machinery cooler that the water consumption is big and quality of water does not require much, and to the less auxiliary machinery cooler that just requires higher to quality of water consumption, then should adopt closed cooling water to cool off. In a power station auxiliary cooling water system using closed cooling water, an expansion tank is usually provided due to the closed characteristic of the system, and the expansion tank is usually disposed on an inlet pipeline of an auxiliary cooling water pump. Closed cooling water systems may be cooled by open water coolers. A mechanical ventilation cooling tower is arranged in a steam turbine generator unit (hereinafter referred to as a unit) without an open cooling water system in a northern water shortage area, and air is used for carrying out dry cooling on closed cooling water. Ambient wind can affect the mechanical draft cooling tower and thus affect the reliable operation of the auxiliary cooling water system. The air cooling unit is generally used in the northern water shortage area, and if the distance between the auxiliary machine cooling tower and the direct air cooling island is short, the fan group of the direct air cooling island can have certain influence on the mechanical ventilation cooling tower. In addition, along with the high-order application of arranging the factory building (promptly in the factory building, arrange turbo generator set in the upper portion of bunker bay), power station auxiliary machinery cooling water system's the position of placing also correspondingly raises to whole power station auxiliary machinery cooling water system design pressure can be higher than conventional pressure, is unfavorable for power station auxiliary machinery cooling water system's reliable operation more.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides an aim at provides an adopt high-order power station auxiliary machinery cooling water system who arranges the factory building for solve above-mentioned technical problem at least partially.
In order to realize the above-mentioned purpose, the embodiment of the utility model provides an adopt high-order power station auxiliary engine cooling water system who arranges the factory building, power station auxiliary engine cooling water system include through the pipe connection with the cooling tower, auxiliary engine circulating water pump and the auxiliary engine cooling indirect heating equipment that form circulation loop, still include with the expansion tank of auxiliary engine circulating water pump's outlet pipe connection, wherein the cooling tower includes a plurality of cooling unit, just two turbo generator set's of factory building auxiliary engine that the high-order was arranged the cooling unit of cooling tower corresponds is two rows of arranging, and a plurality of cooling unit cross arrangement that every turbo generator set corresponds is in two rows, and two turbo generator set two liang of adjacent cooling unit.
Optionally, the expansion tank is arranged at an outlet of the auxiliary circulating water pump.
Optionally, a connection point of an expansion pipe of the expansion water tank is arranged at an outlet of the auxiliary machine circulating water pump, and the expansion pipe is fixed at the connection point.
Optionally, the setting height of the expansion water tank is such that the height difference between the hydrostatic line of the expansion water tank and the highest point of the auxiliary cooling water system is within a set range.
Optionally, the setting height of the expansion water tank is higher than that of a steam turbine generator unit of a high-level layout factory building.
Optionally, the setting height of the expansion water tank is 5-15 m higher than that of the steam turbine generator unit.
Optionally, the power station auxiliary cooling water system further includes a control device in signal connection with the expansion water tank, the cooling tower, the auxiliary circulating water pump and the auxiliary cooling heat exchange device, and the control device is configured to control the power station auxiliary cooling water system to complete starting in the following sequence: controlling a water supply system of an auxiliary machine to fill water into the expansion water tank; opening front and rear valves of the auxiliary cooling heat exchange equipment to ensure the conduction of corresponding pipelines; starting the auxiliary machine circulating water pump; and adjusting the pressure and flow of the cooling water of the auxiliary cooling heat exchange equipment.
Optionally, a water replenishing device is mounted on the expansion water tank.
Optionally, a reinforcing structure is arranged inside the tank body of the expansion tank.
The utility model discloses power station auxiliary engine cooling water system scheme is succinct, the operation is simple, has offset the influence of environment wind and direct air cooling fan crowd to the auxiliary engine cooling tower furthest on arranging the mode. Additionally, the utility model discloses power station auxiliary engine cooling water system can satisfy the high-order needs of arranging the factory building, and its greatly reduced auxiliary engine equipment's design pressure when carrying out pressure design has reduced the unbalanced pressure differential in equipment both sides, has reduced the investment, has guaranteed the long-term safe operation of equipment.
Other features and advantages of embodiments of the present invention will be described in detail in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention, but do not constitute a limitation of the embodiments of the invention. In the drawings:
FIG. 1 is a schematic structural diagram of a power station auxiliary cooling water system adopting a high-level layout factory building according to an embodiment of the present invention;
FIG. 2 is a schematic layout diagram of a cooling unit of a cooling tower of a power station auxiliary cooling water system according to an embodiment of the present invention; and
fig. 3 is a schematic flow chart of the start control of the power station auxiliary cooling water system by the control device in the embodiment of the present invention.
Description of the reference numerals
1 cooling tower 2 auxiliary machine circulating water pump
3 auxiliary cooling heat exchange equipment 4 expansion tank
31 cooling tower 32 cooling unit
Detailed Description
The following describes in detail embodiments of the present invention with reference to the accompanying drawings. It is to be understood that the description herein is only intended to illustrate and explain embodiments of the present invention, and is not intended to limit embodiments of the present invention.
Fig. 1 is the utility model discloses an adopt high-order power station auxiliary machinery cooling water system who arranges the factory building's structural schematic diagram. As shown in fig. 1, the power station auxiliary cooling water system includes a cooling tower 1, an auxiliary circulating water pump 2, an auxiliary cooling heat exchange device 3, and an expansion water tank 4 connected to an outlet pipe of the auxiliary circulating water pump 2.
The cooling water supplied by the power station auxiliary cooling water system is desalted water, the desalted water can be injected into the power station auxiliary cooling water system from a water supply system by using a delivery pump, and the cooling water forms a circulation in the power station auxiliary cooling water system through a cooling tower 1, an auxiliary circulating water pump 2 and an auxiliary cooling heat exchange device 3, and can be cooled to 30-40 ℃ or even lower from 40-50 ℃ for example. In the power station auxiliary cooling water system, an expansion water tank 4 is arranged for mainly stabilizing pressure, expanding and supplementing water.
Here, cooling tower 1, auxiliary engine circulating water pump 2 and auxiliary engine cooling indirect heating equipment 3 and expansion tank 4 have belonged to conventional equipment at current power station auxiliary engine cooling water system, just the embodiment of the utility model discloses mainly focus on the research to the arrangement of these parts, the function of so not giving unnecessary details to these parts.
Fig. 2 is a schematic layout of a cooling unit of a cooling tower according to an embodiment of the present invention. As shown in fig. 2, the cooling tower 1 includes a plurality of cooling units, and the auxiliary cooling water systems of the two turbo generator units of the high-level plant correspond to the cooling tower 1, the cooling units are arranged in two rows, and a plurality of cooling units of each unit are arranged in two rows in a crossed manner, and the cooling units of the two units are adjacent to each other. For example, referring to fig. 2, the cooling units of the auxiliary cooling tower 1 of the first unit include A, B, C, D, E and five cooling units, and the cooling units of the auxiliary cooling tower 1 of the second unit include a, B, C, D and E and are arranged in two rows, where a, B, C, D and E are sequentially arranged in the first row, and then a, B, C, D and E are sequentially arranged in the second row, so that the cooling units of the auxiliary cooling towers of the two units are arranged in two rows of cooling units in a crossed manner, and the cooling units of the two units are adjacent to each other two by two.
The cooling unit of the cooling tower 1 mainly comprises a cooler and a mechanical fan, and the face-to-face crossed arrangement mode is opposite to the parallel arrangement mode, so that the two cooling units can separate the influence of ambient wind and lateral wind generated by a direct air cooling island fan group, and the cooling effects of the two units tend to be consistent. That is, under the same thermal load condition, the temperature of the outlet cooling water of the cooling tower is close to and meets the requirement. In addition, the cooling units A, B, C, D, E and a, b, c, d, e form a "W" and "M" type distribution, which can be used to block the ambient wind and the side wind generated by the direct air cooling island wind turbine group. It will be appreciated that three or more rows of cooling units, in face-to-face arrangement and in cross-over arrangement, may be similarly employed.
Further, in the auxiliary cooling water system of the power station, due to the characteristic of system closure, an expansion water tank 4 is required to be arranged in the system for stabilizing pressure, expanding and supplementing water so as to overcome the influence of the water volume along with the temperature change on the system. However, in the conventional engineering design, in order to ensure that the whole power station auxiliary cooling water system is not emptied and vaporized under the shutdown and various operating conditions, the expansion pipe of the expansion water tank 4 is usually connected to the inlet side water return pipe of the auxiliary circulating water pump 2. However, after the connection point of the expansion pipe is arranged at the position, the pressure of the whole power station auxiliary cooling water system must consider the closing lift of the auxiliary circulating water pump 2 and the static pressure of the expansion water tank 4, so that the requirement on the pressure design of each device in the power station auxiliary cooling water system design is high, the pressure bearing capacity and the investment of the device are increased, the power station auxiliary cooling water system needs to bear the unbalanced pressure difference between the inner side and the outer side of the pipeline for a long time, and the reliable operation of each device is also unfavorable. In addition, along with the establishment of high-order arrangement factory building, the position of placing of power station auxiliary engine cooling water system also correspondingly raises, and the lift of the auxiliary engine circulating water pump that the high-order was arranged increases to make whole power station auxiliary engine cooling water system design pressure can be higher than conventional cooling water system's pressure (for example for 1.5 ~ 2 times of conventional cooling water system's pressure), be unfavorable for power station auxiliary engine cooling water system's reliable operation more.
Therefore, in the embodiment of the utility model provides an in, will expansion tank 4 arranges auxiliary engine circulating water pump 2's exit to greatly reduced power station auxiliary engine cooling water system's design pressure, reduced the unbalanced pressure differential in the inside and outside both sides of pipeline, reduced the investment, can guarantee the long-term safe operation of equipment.
In a preferred embodiment, the installation of the expansion tank 4 at the outlet of the auxiliary circulating water pump 2 may include: and arranging a connection point of an expansion pipe of the expansion water tank 4 at an outlet of the auxiliary machine circulating water pump 2, and fixing the expansion pipe at the connection point.
More preferably, the height of the expansion water tank 4 is set to meet the requirement that the height difference between the hydrostatic pressure line of the expansion water tank 4 and the highest point of the power station auxiliary cooling water system is within a set range, so that the safe operation of the power station auxiliary cooling water system is ensured. In addition, the height of the expansion tank 4 also requires that the turbo generator unit can be cooled normally, i.e., the expansion tank needs to be adapted to the position of the turbo generator unit. In a preferred embodiment, the expansion tank 4 is arranged at a height 5-15 m, preferably 10 m, above the position of the turbine, and as mentioned above, is preferably mounted at 75 m at a turbine position height of 65 m.
In order to meet the requirements of cooling and reliability of a thermal power plant, a plurality of auxiliary machine circulating water pumps can be configured. Referring again to fig. 1, the power station auxiliary cooling water system in the embodiment of the present invention may be provided with two auxiliary circulating water pumps 2, and the system shares one expansion tank 4. When the connection point of the expansion pipe of the expansion water tank 4 is selected, the connection point needs to be positioned at the outlets of the two auxiliary machine circulating water pumps 2.
One of the functions of the expansion tank 4 is to replenish water, and accordingly, a water replenishing device (not shown) may be installed on the expansion tank 4 to secure the amount of water in the expansion tank 4 and the cooling water system. In addition, a liquid level meter (not shown) and/or a pressure gauge (not shown) may be further disposed on the tank body of the expansion tank 4, wherein the liquid level meter is mainly used for detecting the water level in the expansion tank 4 to determine the water amount, and the pressure gauge is mainly used for detecting the water pressure in the expansion tank 4.
It is mentioned above that the expansion tank is arranged high, so that in a preferred embodiment, taking into account the stability of the installation after high arrangement, it is possible to provide a stiffening structure inside and outside the tank of said expansion tank 4 to ensure the stability of the expansion tank. Such as reinforcing members or the like, disposed inside and outside the tank. In addition, the expansion water tank can be fixed by utilizing the frames of all layers of the steam turbine room after the high-position arrangement of the steam turbine.
In a preferred embodiment, the power station auxiliary cooling water system may further include a control device (not shown in the figure) in signal connection with the expansion water tank, the cooling tower, the auxiliary circulating water pump and the auxiliary cooling heat exchange device. The signal connection comprises a plurality of connection modes such as data line connection and wireless connection.
Fig. 3 is a schematic flow chart of the start control of the power station auxiliary cooling water system by the control device in the embodiment of the present invention. As shown in fig. 3, the control device is configured to control the power station auxiliary cooling water system to start up in the following order:
step S1, controlling a water supply system of the auxiliary machine to fill water into the expansion tank 4;
step S2, opening front and rear valves of the auxiliary cooling heat exchange device 3 to ensure the conduction of corresponding pipelines; ensure the water filling of the inlet of the auxiliary machine circulating water pump
In step S3, the auxiliary circulation water pump 2 is started.
And step S4, adjusting the pressure and flow rate of the cooling water of the auxiliary cooling heat exchange device 3.
The loop is formed through steps S1-S4, which is different from the conventional cooling water system in that the start sequence of the conventional cooling water system is that the expansion water tank is filled with water, the front and rear valves of the auxiliary cooling heat exchange device 3 are opened first, and the circulating water pump is started.
The utility model discloses power station auxiliary engine cooling water system's start-up flow must guarantee that the corresponding pipeline of system switches on for conventional cooling water system, ensures that auxiliary engine circulating water pump entry fills water.
The control device may be, for example, a DCS of a turbo generator set, and may collectively control the plurality of auxiliary circulation water pumps 2 and the plurality of sets of cooling units by one set of DCS.
To sum up, the utility model discloses power station auxiliary engine cooling water system scheme is succinct, the operation is simple, has offset environment wind and direct air cooling fan crowd to auxiliary engine cooling water system's influence furthest on the arrangement mode. Additionally, the utility model discloses power station auxiliary engine cooling water system can satisfy the high-order needs of arranging the factory building, and its greatly reduced auxiliary engine equipment's design pressure when carrying out pressure design has reduced the unbalanced pressure differential in equipment both sides, has reduced the investment, has guaranteed the long-term safe operation of equipment.
The above describes in detail optional implementation manners of embodiments of the present invention with reference to the accompanying drawings, however, the embodiments of the present invention are not limited to the details in the above implementation manners, and in the technical concept scope of the embodiments of the present invention, it is possible to perform various simple modifications on the technical solutions of the embodiments of the present invention, and these simple modifications all belong to the protection scope of the embodiments of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the embodiments of the present invention do not separately describe various possible combinations.
In addition, various different implementation manners of the embodiments of the present invention can be combined arbitrarily, and as long as it does not violate the idea of the embodiments of the present invention, it should be considered as the disclosure of the embodiments of the present invention.
Claims (9)
1. The utility model provides an adopt high-order power station auxiliary engine cooling water system who arranges the factory building, a serial communication port, power station auxiliary engine cooling water system include cooling tower (1), auxiliary engine circulating water pump (2) and auxiliary engine cooling indirect heating equipment (3) through the pipe connection in order to form circulation loop, still include with expansion tank (4) of the exit tube coupling of auxiliary engine circulating water pump (2), wherein cooling tower (1) includes a plurality of cooling unit, just the high-order auxiliary engine that two turbo generator set of arranging the factory building correspond the cooling unit of cooling tower (1) is two rows of arranging, and a plurality of cooling unit cross arrangement that every turbo generator set corresponds is in two rows, and two turbo generator set two liang of adjacent cooling unit.
2. The power plant auxiliary cooling water system according to claim 1, characterized in that the expansion tank (4) is arranged at the outlet of the auxiliary circulating water pump (2).
3. The power plant auxiliary cooling water system according to claim 2, characterized in that a connection point of an expansion pipe of the expansion water tank (4) is provided at an outlet of the auxiliary circulating water pump (2), and the expansion pipe is fixed at the connection point.
4. A power station auxiliary cooling water system according to claim 2, characterized in that the height of the expansion water tank (4) is set to make the height difference between the hydrostatic pressure line of the expansion water tank (4) and the highest point of the auxiliary cooling water system within a set range.
5. The power plant auxiliary cooling water system according to claim 2, characterized in that the expansion water tank (4) is arranged at a height higher than that of a turbo generator set of a high-level layout factory.
6. The power plant auxiliary cooling water system according to claim 5, characterized in that the expansion water tank (4) is arranged at a height 5-15 m higher than the height at which the turbo generator unit is arranged.
7. The power station auxiliary cooling water system according to claim 1, characterized by further comprising a control device in signal connection with the expansion water tank (4), the cooling tower (1), the auxiliary circulating water pump (2) and the auxiliary cooling heat exchange device (3), wherein the control device is used for controlling the power station auxiliary cooling water system to complete startup.
8. The power plant auxiliary cooling water system according to claim 1, characterized in that a water supplementing device is installed on the expansion water tank (4).
9. The power plant auxiliary cooling water system according to claim 1, characterized in that a reinforcing structure is arranged inside the tank body of the expansion water tank (4).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920725646.4U CN210570167U (en) | 2019-05-20 | 2019-05-20 | Power station auxiliary machine cooling water system adopting high-level layout factory building |
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| CN201920725646.4U CN210570167U (en) | 2019-05-20 | 2019-05-20 | Power station auxiliary machine cooling water system adopting high-level layout factory building |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112797813A (en) * | 2021-01-05 | 2021-05-14 | 中国神华能源股份有限公司国华电力分公司 | Auxiliary machine cooling water system applied to high-position arranged turboset |
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2019
- 2019-05-20 CN CN201920725646.4U patent/CN210570167U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112797813A (en) * | 2021-01-05 | 2021-05-14 | 中国神华能源股份有限公司国华电力分公司 | Auxiliary machine cooling water system applied to high-position arranged turboset |
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