A clustered layout structure of buildings and structures in a circulating water supply system

Abstract

The present invention relates to the technical field of generator set equipment, and discloses a clustered arrangement structure of circulating water supply system buildings, including a cooling water circulation building group, the cooling water circulation building group includes a cooling tower, a water collection tank, a return ditch, a water absorption well and a circulating water pump room, a plurality of cooling towers are provided, and a plurality of cooling towers are connected in a straight line to form a cooling tower row, the cooling tower row is arranged on the water collection tank, and air inlets are provided on both sides of the cooling tower that are relatively distributed along the width direction of the cooling tower row, the water collection tank, the return ditch and the water absorption well are connected in sequence and the water flow direction remains unchanged, the circulating water pump room is located on one side of the length direction of the cooling tower row, the return ditch and the water absorption well are arranged in sequence between the cooling tower row and the circulating water pump room, a circulating water pump is provided in the circulating water pump room, and the water absorption port of the circulating water pump is connected to the water absorption well. The present invention has a reasonable layout, effectively reduces the occupied area without affecting the air intake cooling effect of the cooling tower, saves engineering investment, and maintains the stability of the water flow state in the system.

Description

Technical Field

[0001] The present invention relates to the technical field of generator set equipment, and in particular to a clustered arrangement structure of buildings and structures of a circulating water supply system. Background Art

[0002] The steam sent from the boiler to the turbine is discharged into the condenser after work and condensed into water. This requires a cooling medium to exchange heat with the steam in the condenser through the condenser tube. Power plants generally use water as a cooling medium, and the water supply system is a cooling water system that provides cooling water for the unit and circulates it. It is mainly composed of cooling equipment, water pumps and pipelines. In order to protect the water environment and save water resources, power plants generally use a circulating water supply system for cooling water.

[0003] The circulating water supply system is a cooling system that uses circulating cooling water as the cooling medium. After the condenser completes the first cooling, it is cooled and recycled by the cooling tower. Its process flow is: cooling tower water collection tank → gravity return ditch → circulating water pump room → pressure water supply pipe → condenser → pressure return pipe → cooling tower → cooling tower water collection tank. In the circulating water supply system, cooling water is drawn from the water collection tank at the bottom of the cooling tower by the circulating water pump. The warm water after flowing through the condenser is sent to the water distribution pipe of the cooling tower, falls on the water spraying filler, and falls into the bottom water collection tank after being cooled. The main structures in the system include circulating water pump room, cooling tower and water collection tank, gravity return ditch, etc. The circulating water pump room includes pump room and water absorption well, and is arranged with circulating water pump, gate, filter and other equipment. According to different cooling technologies, circulating water cooling towers are divided into natural ventilation cooling towers and mechanical ventilation cooling towers. Among them, mechanical ventilation cooling towers have the advantages of low initial investment and short construction period and are more widely used.

[0004] The working principle of the mechanical ventilation cooling tower is as follows: circulating water with a relatively high temperature is sprayed onto the water-spraying filler through the cooling tower water distribution system. At the same time, under the action of the fan, cold air outside the tower is introduced, and flows from bottom to top in the tower in the opposite direction to the water flow. The water film on the filler is in extensive contact with the cold air, and a mass transfer and heat transfer process occurs, which takes away the heat of the circulating water and reduces the water temperature of the circulating water.

[0005] The cooling water volume of a single mechanical ventilation cooling tower is relatively small, and generally multiple units and multiple rows are required for a project to form a cooling tower group, which leads to the coexistence of heat reflux and thermal interference. Therefore, the mechanical ventilation cooling tower needs to be reasonably planned and arranged in combination with the wind direction conditions at the project site, and the necessary distance between the air inlet and the surrounding structures and tower groups should be ensured, and fresh cold air should be introduced into the tower as much as possible to reduce the impact of heat reflux of the cooling tower group, so as to give full play to the cooling efficiency of the cooling tower.

[0006] The cooling towers are arranged in a one-to-one correspondence with the gas generator sets, and the circulating water pump room is arranged vertically in the direction of the cooling tower air inlet. In order to reduce the impact of the buildings on the cooling tower air inlet, the necessary distance between the cooling tower groups and between the circulating water pump room and the cooling tower is maintained in accordance with the specifications. Figure 1 As shown, it mainly includes a cooling tower 111, a water collection tank 12, a circulating water pump room 15 and a water suction well 14. Different water collection tanks 12 of the same unit and the water collection tanks 12 and the water suction well 14 are connected by a return ditch 13. The outlet water of the cooling tower 111 flows from the water collection tank 12 to the return ditch 13 and is led to the water suction well 14, and then is pumped by the circulating water pump in the circulating water pump room 15. Flat steel gates 131 and flat filter screens 132 are arranged in front and back along the water flow direction on the return ditch 13. All circulating water pumps share a circulating water pump room 15. The equipment maintenance site is located at one end of the circulating water pump. There are the following problems: 1. The entire journey from the water collection tank to the water suction well 1. The direction of the process water flow changes many times, the flow state of the water in the system is disordered, cavitation is easily generated during the operation of the circulating water pump, and the safety and reliability are low; 2. The maintenance conditions are not good. A drainage ditch is set between the cooling tower and the circulating pump room, which cannot be used as a heavy maintenance channel. Whether it is the cooling tower equipment or the equipment in the circulating pump room, the maintenance equipment channel is a one-way road, which increases the difficulty of operation and maintenance; 3. Lifting devices are set for the flat steel gate and the flat filter respectively, which increases the investment in civil engineering and equipment; 4. It occupies a large area, increases the land acquisition fee, and does not utilize the overall layout of the plant.

[0007] The present invention proposes a method for arranging clusters of buildings and structures in a circulating water supply system, which effectively optimizes the functions and arrangements of various buildings and structures in the circulating water system and fully utilizes site resources. Summary of the invention

[0008] The technical problem to be solved by the present invention is to provide a clustered layout structure of circulating water supply system buildings with a reasonable layout, which can effectively reduce the floor space without affecting the cooling effect of the cooling tower air intake, save engineering investment, and maintain stable water flow in the system.

[0009] In order to achieve the above-mentioned purpose, the present invention provides a clustered arrangement structure of buildings and structures of a circulating water supply system, including a cooling water circulation building group used in a one-to-one correspondence with a gas generator set, the cooling water circulation building group including a cooling tower, a water collecting tank, a return ditch, a water suction well and a circulating water pump room, a plurality of cooling towers are arranged, and a plurality of the cooling towers are connected in a straight line to form a cooling tower row, the cooling tower row is arranged on the water collecting tank, and the cooling towers are provided with air inlets on both sides relatively distributed along the width direction of the cooling tower row, the water collecting tank, the return ditch and the water suction well are connected in sequence and the water flow direction remains unchanged, the circulating water pump room is located on one side of the length direction of the cooling tower row, the return ditch and the water suction well are arranged in sequence between the cooling tower row and the circulating water pump room, a circulating water pump is provided in the circulating water pump room, and the water suction port of the circulating water pump is connected to the water suction well.

[0010] As a preferred solution of the present invention, at least two groups of cooling water circulation building groups are provided, and two or more cooling tower rows are arranged parallel to and opposite to each other.

[0011] As a preferred embodiment of the present invention, the ratio of the distance between two adjacent cooling tower rows to the height of the air inlet is not less than 4:1.

[0012] As a preferred embodiment of the present invention, two or more of the circulating water pump rooms are arranged on the same side of the cooling tower row, a maintenance site is provided between adjacent circulating water pump rooms, a maintenance passage is provided between adjacent cooling tower rows, and the maintenance site is connected to the maintenance passage.

[0013] As a preferred solution of the present invention, the ratio of the length of the cooling tower row to its width is no more than 8:1.

[0014] As a preferred solution of the present invention, the distance between the circulating water pump room and the cooling tower row is not less than 4m.

[0015] As a preferred embodiment of the present invention, the bottom surface of the water collection tank is provided with a slope inclined toward the return ditch, and the slope portion of the slope is not greater than 1:4.

[0016] As a preferred embodiment of the present invention, the bottom surface of the connection between the return ditch and the water suction well is lower than the bottom end of the water suction port of the circulating water pump and the vertical distance between the two is not less than 0.5 times the diameter of the water suction port of the circulating water pump, the bottom surface of the water suction well is lower than the bottom end of the water suction port of the circulating water pump and the vertical distance between the two is not less than 0.8 times the diameter of the water suction port of the circulating water pump, and the length of the water suction well along the water flow direction is not less than 3.5 times the diameter of the water suction port of the circulating water pump.

[0017] As a preferred embodiment of the present invention, the return ditch is provided with a gate and a filter arranged in the same groove, and the length of the return ditch is not less than 2m.

[0018] As a preferred solution of the present invention, the cooling water circulation building group also includes a lifting device for lifting gates and filters, and the lifting device is installed on a structural column on one side of the cooling tower row close to the return ditch.

[0019] The embodiment of the present invention is a clustered arrangement structure of buildings and structures of a circulating water supply system. Compared with the prior art, its beneficial effect is that: multiple cooling towers are connected in a straight line to form a cooling tower row, and the cooling towers are provided with air inlets on both sides of the cooling towers that are relatively distributed along the width direction of the cooling tower row, that is, the air inlets of the cooling towers in the cooling tower row do not affect each other, and the circulating water pump room is located on one side of the length direction of the cooling tower row, that is, the circulating water pump room is located on the non-air inlet side of the cooling tower row, which will not affect the air inlet of the cooling tower row, and the return ditch and the suction well are arranged in sequence between the cooling tower row and the circulating water pump room, and the water flow direction remains unchanged, which effectively saves floor space, and avoids multiple changes in the flow direction of the water flow, and the water flow state is stable, turbulence is avoided, and it is conducive to the safe and reliable operation of equipment such as circulating water pumps. The present invention promotes the stability of the water flow state in the system and improves the safety and reliability of equipment operation by optimizing the plane and elevation design of the building; effectively reduces the static investment of engineering equipment and civil engineering; optimizes the cluster arrangement of buildings of the circulating water supply system, saves land, and has strong adaptability to different general plane layouts. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is the layout diagram of the existing circulating water system structures;

[0021] Figure 2 is a top view of the present invention;

[0022] Figure 3 is a cross-sectional view of a cooling tower row of the present invention;

[0023] In the figure, 1. Cooling water circulation building group; 11. Cooling tower row; 111. Cooling tower; 12. Collection tank; 121. Slope; 13. Return ditch; 131. Gate; 132. Filter; 14. Suction well; 15. Circulating water pump room; 2. Maintenance site; 21. Maintenance passage. DETAILED DESCRIPTION

[0024] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0025] In the description of the present invention, it should be understood that the present invention adopts the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0026] like Figure 2-3 As shown, a clustered arrangement structure of buildings of a circulating water supply system in a preferred embodiment of the present invention includes a cooling water circulation building group 1 used in one-to-one correspondence with a gas generator set, that is, a group of cooling water circulation building groups 1 works for one gas generator set, and the cooling water circulation building group 1 includes a cooling tower 111, a water collection tank 12, a return ditch 13, a water absorption well 14 and a circulating water pump room 15. A plurality of cooling towers 111 are provided, and the plurality of cooling towers 111 are connected in a straight line to form a cooling tower row 11. The cooling towers The row 11 is arranged on the collecting tank 12, and the cooling tower 111 is provided with air inlets on both sides relatively distributed along the width direction of the cooling tower row 11. The collecting tank 12, the return ditch 13 and the suction well 14 are connected in sequence and the water flow direction remains the same. The circulating water pump room 15 is located on one side of the length direction of the cooling tower row 11, and the return ditch 13 and the suction well 14 are arranged in sequence between the cooling tower row 11 and the circulating water pump room 15. A circulating water pump is arranged in the circulating water pump room 15, and the suction port of the circulating water pump is connected to the suction well 14.

[0027] The working principle of this embodiment is as follows: the cooling water used for cooling the condenser is transported to the cooling tower 111, and the cooling water flows from top to bottom into the water collecting tank 12. During the flowing process, the cooling water contacts with the air from bottom to top to achieve cooling. The cooling water in the water collecting tank 12 flows to the water suction well 14 through the return ditch 13, and finally the circulating water pump in the circulating water pump room 15 pumps the water in the water suction well 14 into the condenser to achieve cooling water circulation.

[0028] The multiple cooling towers 111 of this embodiment are connected in a straight line to form a cooling tower row 11, and the cooling towers 111 are provided with air inlets on both sides of the cooling towers 111 that are relatively distributed along the width direction of the cooling tower row 11, that is, the air inlets of the cooling towers 111 in the cooling tower row 11 do not affect each other, and the circulating water pump room 15 is located on one side of the length direction of the cooling tower row 11, that is, the circulating water pump room 15 is located on the non-air inlet side of the cooling tower row 11, which will not affect the air inlet of the cooling tower row 11, and the return ditch 13 and the suction well 14 are arranged in sequence between the cooling tower row 11 and the circulating water pump room 15, and the water flow direction remains unchanged, which effectively saves floor space and avoids multiple changes in the water flow direction. The water flow state is stable, turbulence is avoided, and it is conducive to the safe and reliable operation of equipment such as circulating water pumps. The present invention promotes the stability of the water flow state in the system and improves the safety and reliability of equipment operation by optimizing the plane and elevation design of the building structure; effectively reduces the static investment of engineering equipment and civil engineering; optimizes the cluster layout of the buildings of the circulating water supply system, saves land, and has strong adaptability to different general plane layouts.

[0029] Exemplarily, at least two groups of cooling water circulation building groups 1 are arranged, and two or more cooling tower rows 11 are arranged parallel to each other and opposite to each other. Since air inlets are provided on the front and rear sides of the cooling tower 111, air can pass through the cooling tower 111 from the front and rear directions, thereby reducing the influence of mutual obstruction of air intake by two adjacent cooling tower rows 11, that is, this arrangement structure can effectively reduce the overall footprint while ensuring the air intake of multiple cooling water tower rows.

[0030] Exemplarily, the ratio of the distance between two adjacent cooling tower rows 11 and the height of the air inlet is not less than 4:1. The height of the air inlet refers to the height of the top of the air inlet. It is ensured that there is sufficient space between two adjacent cooling tower rows 11 to ensure that sufficient air volume can be provided to the cooling tower rows 11 to avoid the backflow of hot and humid air discharged from the two cooling tower rows 11, which interferes with each other and affects the cooling effect.

[0031] Exemplarily, two or more circulating water pump rooms 15 are arranged on the same side of the cooling tower row 11, and specifically, different circulating water pump rooms 15 are respectively located on the same side of their corresponding cooling tower row 11, such as Figure 2 As shown, a maintenance site 2 is provided between adjacent circulating water pump rooms 15, and a maintenance passage 21 is provided between adjacent cooling tower rows 11. The maintenance site 2 is connected to the maintenance passage 21, which reduces the floor space, provides good maintenance conditions, and facilitates maintenance.

[0032] Exemplarily, the ratio of the length of the cooling tower row 11 to its width is not greater than 8:1 to avoid affecting the overall cooling effect due to heat reflux. Generally, the length of a single cooling tower 111 is approximately equal to its width. At this time, the number of cooling towers 111 in the cooling tower row 11 should not be greater than 8. For example, in this embodiment, 5 cooling towers 111 are connected to form the cooling tower row 11.

[0033] Exemplarily, the distance between the circulating water pump room 15 and the cooling tower row 11 is not less than 4 m, and a fire protection distance is reserved.

[0034] Exemplarily, the bottom surface of the water collecting pool 12 is provided with a slope 121 inclined toward the return ditch 13, so as to facilitate the water in the water collecting pool 12 to flow toward the return ditch 13 and optimize the water flow state. The slope of the slope 121 is not greater than 1:4 to reduce turbulence. It should be noted that the slope 121 is arranged at the connection between the water collecting pool 12 and the return ditch 13, and can also be arranged on the bottom surface of the entire water collecting pool 12.

[0035] Exemplarily, the bottom surface of the connection between the return ditch 13 and the suction well 14 is lower than the bottom end of the water suction port of the circulating water pump and the vertical distance between the two is not less than 0.5 times the diameter of the water suction port of the circulating water pump, and the bottom surface of the suction well 14 is lower than the bottom end of the water suction port of the circulating water pump and the vertical distance between the two is not less than 0.8 times the diameter of the water suction port of the circulating water pump, that is, the bottom surface of the return ditch 13 is lower than the bottom surface of the suction well 14 is lower than the bottom end of the water suction port of the circulating water pump, ensuring the direction of water flow and ensuring that the water suction port of the circulating water pump can smoothly absorb water, the length of the suction well 14 along the water flow direction is not less than 3.5 times the diameter of the water suction port of the circulating water pump, and it has a certain water flow buffer distance and ensures the water supply of the suction well 14.

[0036] Exemplarily, the return ditch 13 is provided with a gate 131 and a filter 132 arranged in the same groove, that is, an installation groove is provided on the return ditch 13. When the system is operating normally, the filter 132 is placed in the installation groove. When the system is overhauled and maintained, the gate 131 is placed in the installation groove. This can ensure the water quality of the system operation while reducing the length of the return ditch 13 and the area occupied by the system structure. The length of the return ditch 13 is not less than 2m, ensuring that the water in the return ditch 13 has sufficient buffer distance to reduce the generation of turbulence.

[0037] Exemplarily, the cooling water circulation building group also includes a lifting device for lifting the gate 131 and the filter 132. The gate 131 and the filter 132 are arranged in the same groove so that the gate 131 and the filter 132 can share the lifting device, without setting up two lifting devices, thereby reducing the static investment in the guide groove, the lifting device and its civil engineering. The lifting device is installed on the structural column on the side of the cooling tower row 11 close to the return ditch 13. The fixing of the lifting device can utilize the structural column of the cooling tower 111, and no additional civil engineering column for the lifting device is required, which not only optimizes the layout but also reduces the project cost.

[0038] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A clustered layout structure of buildings in a circulating water supply system, characterized in that: The invention relates to a cooling water circulation building group used in a one-to-one correspondence with the gas generator set, wherein the cooling water circulation building group comprises a cooling tower, a water collecting tank, a return water ditch, a water suction well and a circulating water pump room. A plurality of cooling towers are arranged, and a plurality of cooling towers are connected in a straight line to form a cooling tower row. The cooling tower row is arranged on the water collecting tank. Air inlets are arranged on two sides of the cooling towers that are relatively distributed along the width direction of the cooling tower row. The water collecting tank, the return water ditch and the water suction well are connected in sequence and the water flow direction remains unchanged. The circulating water pump room is located on one side of the length direction of the cooling tower row. The return water ditch and the water suction well are arranged in sequence between the cooling tower row and the circulating water pump room. A circulating water pump is arranged in the circulating water pump room. The water suction port of the circulating water pump is connected to the water suction well, the distance between the circulating water pump room and the cooling tower row is not less than 4m, the bottom surface of the water collection tank is provided with a slope inclined toward the return water ditch, the slope of the slope is not greater than 1:4, the length of the return water ditch is not less than 2m, the bottom surface of the connection between the return water ditch and the water suction well is lower than the bottom end of the water suction port of the circulating water pump and the vertical distance between the two is not less than 0.5 times the diameter of the water suction port of the circulating water pump, the bottom surface of the water suction well is lower than the bottom end of the water suction port of the circulating water pump and the vertical distance between the two is not less than 0.8 times the diameter of the water suction port of the circulating water pump, and the length of the water suction well along the water flow direction is not less than 3.5 times the diameter of the water suction port of the circulating water pump.

2. The clustered layout structure of the circulating water supply system according to claim 1 is characterized by: The cooling water circulation building groups are arranged in at least two groups, and two or more cooling tower rows are arranged parallel to and opposite to each other.

3. The clustered arrangement structure of buildings of the circulating water supply system according to claim 2 is characterized in that: The ratio of the distance between two adjacent cooling tower rows to the height of the air inlet is not less than 4:

1.

4. The clustered arrangement structure of buildings of the circulating water supply system according to claim 2 is characterized in that: Two or more of the circulating water pump rooms are arranged on the same side of the cooling tower row, a maintenance site is provided between adjacent circulating water pump rooms, a maintenance passage is provided between adjacent cooling tower rows, and the maintenance site is connected to the maintenance passage.

5. The clustered arrangement structure of buildings of the circulating water supply system according to claim 1 is characterized in that: The ratio of the length of the cooling tower row to its width is not greater than 8:

1.

6. The clustered arrangement structure of buildings of the circulating water supply system according to claim 1 is characterized in that: The return ditch is provided with a gate and a filter arranged in the same groove.

7. The clustered arrangement structure of buildings of the circulating water supply system according to claim 6 is characterized by: The cooling water circulation building group also includes a lifting device for lifting gates and filters, and the lifting device is installed on a structural column on one side of the cooling tower row close to the return ditch.

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