Anti-freezing device for air cooling unit of direct air cooling condenser

Abstract

The utility model discloses an air cooling unit anti-freezing device of a direct air cooling condenser, which relates to the technical field of air cooling unit anti-freezing devices of air cooling islands and comprises an air cooling island, an air inlet is arranged below the air cooling island, an air supply mechanism is arranged in the air inlet, and an air cooling unit anti-freezing mechanism is arranged on the other side of the air cooling island. In the using process, the motor drives the wind shielding curtain roller and the steel wire rope roller to synchronously rotate in a matched mode, when the wind shielding curtain roller rotates to wind a wind shielding curtain, the steel wire rope roller rotates to unwind a steel wire rope, and on the contrary, when the wind shielding curtain roller rotates to unwind the wind shielding curtain, the steel wire rope roller rotates to wind the steel wire rope. Accordingly, the ends, extending towards the center end of the air inlet, of the air blocking curtains are kept to do balanced back-and-forth movement, the ends, extending towards the center end of the air inlet, of the two air blocking curtains are close to or away from each other, the air blocking curtains are opened or closed, cold air is prevented from flowing upwards when the air blocking curtains are closed, and then the anti-freezing capacity of the air cooling unit in winter is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of antifreeze devices for air-cooling units in air-cooling islands, and in particular to an antifreeze device for air-cooling units of direct air-cooled condensers. Background Art

[0002] Direct air-cooled condensers have been widely used in the energy and other industries. Direct air-cooled condensers exchange heat between steam carrying waste heat and humid air through air-cooled radiators, transfer waste heat to humid air and dissipate it into the atmosphere, so that the steam flowing through the air radiator condenses into water. In order to meet the winter antifreeze requirements, air-cooled units usually operate at a relatively high back pressure, which prevents the advantages of air cooling from being fully utilized. The performance of air-cooled units is subject to the influence of the environmental wind field, and the ability to resist environmental strong winds is poor.

[0003] When the power plant's direct air-cooled condenser is operating in low-temperature weather in winter, the air-cooled unit is very likely to freeze even when the motor is stopped. The antifreeze measures for the air-cooled condenser do not fundamentally solve the antifreeze problem of the air-cooled unit, and the high back pressure operation of the unit has certain limitations, and has certain damage to the safety and economy of the unit operation.

[0004] In the prior art, the antifreeze device has many problems such as transmission system design defects, poor wear resistance and corrosion resistance of silicone cloth (tarpaulin), etc. After long-term operation of the equipment, the failure rate increases significantly, and a large amount of manpower and material resources are required for maintenance and repair. In addition, due to the increase in the external steam supply of the unit in winter, the steam intake of the air-cooled island heat dissipation tube bundle is further reduced. During winter operation, the air-cooled single heat dissipation tube bundle is very likely to freeze. At this time, it is necessary to ensure that the antifreeze device is put into use in time and achieves the designed antifreeze effect. Otherwise, there is a risk of large-scale freezing of the air-cooled island heat dissipation tube bundle, and even threatens the safe operation of the unit.

[0005] Therefore, it is urgent to upgrade the antifreeze device of the air cooling unit to improve the antifreeze effect, reduce the equipment failure rate, extend the service life of the equipment, and ensure the safe and stable operation of the unit. Utility Model Content

[0006] The purpose of the utility model is to provide an antifreeze device for an air cooling unit of a direct air condenser to solve the following technical problems:

[0007] How to improve the antifreeze effect and operational reliability of the antifreeze device of the air cooling unit in the air cooling island.

[0008] The purpose of the utility model can be achieved through the following technical solutions:

[0009] A direct air-cooled condenser air-cooling unit antifreeze device comprises an air-cooling island, an air inlet is arranged on the air-cooling island, a fan for supplying air to the air inlet is arranged on the lower side of the air-cooling island, and an air-cooling unit antifreeze mechanism is arranged on the other side.

[0010] As a further solution of the present utility model: The anti-freezing mechanism of the air-cooling unit includes several anti-freezing units arranged in an array on the air-cooling island.

[0011] As a further solution of the present utility model: There are three groups of the anti-freezing units arranged. Among them, each group of anti-freezing units includes two groups of wind-breaking curtains symmetrically and horizontally arranged on the air inlet. One end of the wind-breaking curtain is located on one side of the air inlet, and the other end extends towards the center end of the air inlet; the wind-breaking curtain is connected to a driving part that drives it to extend or contract towards the center end of the air inlet.

[0012] As a further solution of the present utility model: The driving part includes:

[0013] A wind-breaking curtain roller, one end of the wind-breaking curtain is wound around the wind-breaking curtain roller, and the other end extends towards the center end of the air inlet;

[0014] A wire rope roller, wire ropes are respectively wound at both ends of the wire rope roller, and the two wire ropes respectively pass through a wire guiding mechanism and are fixedly connected to one end of the wind-breaking curtain towards the center of the air inlet;

[0015] Both the wind-breaking curtain roller and the wire rope roller are driven to rotate by a motor.

[0016] As a further solution of the present utility model: The wire guiding mechanism includes a plurality of wire rope wheels, and the wire rope passes through the plurality of wire rope wheels and is connected to the wind-breaking curtain.

[0017] As a further solution of the present utility model: Guide rails are arranged on both sides of the wind-breaking curtain of each group of anti-freezing units. The wire rope wheels are installed inside the guide rails, and the two side edges of the wind-breaking curtain are located inside the guide rails.

[0018] As a further solution of the present utility model: A number of reinforcing ribs are equidistantly arranged between the two guide rails on both sides of each group of anti-freezing units, and a number of support rods are vertically installed on the number of reinforcing ribs.

[0019] As a further solution of the present utility model: A guide roller is also arranged beside the wind-breaking curtain roller, and the wind-breaking curtain bypasses the guide roller and is connected to the wind-breaking curtain roller.

[0020] As a further solution of the present utility model: Installation boxes corresponding to the multiple groups of wind-breaking curtains are installed on the air-cooling island, and the wind-breaking curtain roller, the wire rope roller and the guide roller are all located in the installation boxes.

[0021] The beneficial effects of the present utility model:

[0022] When using the anti-freezing device for the air-cooling unit of the direct air-cooled condenser of the present utility model, the windshield curtain roller and the wire rope roller are driven by two groups of motors to rotate synchronously in a cooperative manner. When the windshield curtain roller rotates to wind up the windshield curtain, the wire rope roller rotates to unwind the wire rope. Conversely, when the windshield curtain roller rotates to unwind the windshield curtain, the wire rope roller rotates to wind up the wire rope, so as to keep the end of the windshield curtain extending towards the center of the air inlet moving back and forth in balance, making the ends of the two windshield curtains extending towards the center of the air inlet approach or move away from each other, thereby opening and closing the windshield curtain; during this process, the windshield curtain maintains a certain tension and is in a taut state, and whether it is closed or retracted, it can avoid being damaged due to shaking by the blower; at the same time, the windshield curtain is made of PVC knife-coated cloth, and the fabric is more strong and wear-resistant; the overall structure of the anti-freezing mechanism of the air-cooling unit is more stable, has stronger wind resistance, lower failure rate, higher stability and longer service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present utility model will be further described below in conjunction with the drawings.

[0024] Figure 1 is a schematic structural diagram of an anti-freezing device for the air-cooling unit of the direct air-cooled condenser in an embodiment of the present utility model;

[0025] Figure 2 is Figure 1 a cross-sectional view of the anti-freezing device for the air-cooling unit of the direct air-cooled condenser;

[0026] Figure 3 is Figure 1 a schematic structural diagram of the air-cooling unit anti-freezing mechanism in the anti-freezing device for the air-cooling unit of the direct air-cooled condenser;

[0027] Figure 4 is Figure 1 a schematic structural diagram of the anti-freezing unit in the anti-freezing device for the air-cooling unit of the direct air-cooled condenser;

[0028] Figure 5 is Figure 4 an enlarged schematic structural diagram of A in

[0029] Figure 6 is Figure 4 an enlarged schematic structural diagram of B in

[0030] In the figure: 100, air-cooling island; 200, blower; 300, air-cooling island walkway railing; 400, guide rail; 401, reinforcing rib; 402, support rod; 500, anti-freezing unit; 501, windshield curtain; 502, windshield curtain roller; 503, wire rope roller; 504, guide roller; 505, wire rope wheel; 600, installation box. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0032] Please refer to Figures 1-2 , the present utility model discloses an anti-freezing device for an air-cooled unit of a direct air-cooled condenser, which includes an air-cooled island 100. An air inlet is provided on the air-cooled island 100. A fan 200 for sending air to the air inlet is provided on the lower side of the air-cooled island 100, and an anti-freezing mechanism for the air-cooled unit is provided on the upper side.

[0033] Please refer to Figures 3-4 , the anti-freezing mechanism for the air-cooled unit includes several groups of anti-freezing units 500 arranged in an array on the air-cooled island 100. The number of anti-freezing units 500 is not specifically limited and can be determined according to the size of the air inlet. For example, in the embodiments of the present utility model, three groups of anti-freezing units 500 are provided. Among them, the fan 200 is installed at the center of the anti-freezing unit 500 in the middle group.

[0034] Each group of anti-freezing units 500 includes two groups of wind-breaking curtains 501 symmetrically and horizontally arranged on the air inlet. The material of the wind-breaking curtain 501 is PVC knife-coated cloth, and the fabric is strong and wear-resistant. One end of it is located on one side of the air inlet, and the other end extends towards the center end of the air inlet. The ends of the two groups of wind-breaking curtains 501 extending towards the center end of the air inlet can be in contact with each other to close the air inlet; the wind-breaking curtain 501 is connected to a driving part that drives it to extend or contract towards the center end of the air inlet. The driving part can drive the two wind-breaking curtains 501 in each group of anti-freezing units 500 to approach or move away from each other at the ends extending towards the center end of the air inlet, so as to adjust the opening degree of the air inlet and realize the adjustment of the air intake volume.

[0035] Each group of driving mechanisms corresponds to an installation box 600. The installation box 600 is installed on the air-cooled island 100 and is arranged at one end of the wind-breaking curtain 501 on the side of the air inlet: Guide rails 400 are respectively arranged on both sides of the two wind-breaking curtains 501 in each group of anti-freezing units 500. The two guide rails 400 and the two installation boxes 600 enclose a square frame, and the two wind-breaking curtains 501 are located in the square frame.

[0036] Please refer to Figures 5-6, the driving part includes a windshield curtain roller 502, a wire rope roller 503 and a guide roller 504, and all three are installed in the installation box 600. Among them, one end of the windshield curtain 501 bypasses the guide roller 504 and is wound around the windshield curtain roller 502, and the other end extends towards the center end of the air inlet. Moreover, both sides of the windshield curtain 501 are respectively located inside the two guide rails 400; wire ropes are wound around both ends of the wire rope roller 503, and the two wire ropes respectively pass through the wire guiding mechanism and are fixedly connected to one end of the windshield curtain 501 facing the center of the air inlet; the wire guiding mechanism includes two wire rope wheels 505, both of the two wire rope wheels 505 are installed inside the guide rail 400, and the wire rope passes through a plurality of wire rope wheels 505 and is connected to the windshield curtain 501.

[0037] Specifically, both the windshield curtain roller 502 and the wire rope roller 503 are driven by a rotating motor to rotate synchronously in a cooperative manner. When the windshield curtain roller 502 rotates to wind up the windshield curtain 501, the wire rope roller 503 rotates to unwind the wire rope. On the contrary, when the windshield curtain roller 502 rotates to unwind the windshield curtain 501, the wire rope roller 503 rotates to wind up the wire rope, so as to keep the end of the windshield curtain 501 extending towards the center end of the air inlet moving back and forth in a balanced manner, making the ends of the two groups of windshield curtains 501 extending towards the center end of the air inlet approach or move away from each other, thereby realizing the opening or closing of the anti-freezing unit 500.

[0038] A number of reinforcing ribs 401 are equidistantly arranged between the two guide rails 400 on both sides of each anti-freezing unit 500, and a number of support rods 402 are vertically installed on the number of reinforcing ribs 401 to enhance the overall stability of the guide rail 400.

[0039] For the anti-freezing unit 500 in the middle group, the fan 200 is installed between the two guide rails 400 and is located between the two groups of windshield curtains 501; meanwhile, air-cooled island walkway railings 300 are respectively installed on the upper sides of the two guide rails 400 to form a protection mechanism when workers walk.

[0040] The working principle of the present utility model:

[0041] In use, the windshield curtain roller 502 and the wire rope roller 503 are both driven by two sets of motors to rotate synchronously in a cooperative manner. When the windshield curtain roller 502 rotates to wind up the windshield curtain 501, the wire rope roller 503 rotates to unwind the wire rope. Conversely, when the windshield curtain roller 502 rotates to unwind the windshield curtain 501, the wire rope roller 503 rotates to wind up the wire rope. Thus, a balanced back-and-forth movement is maintained at the end of the windshield curtain 501 that extends towards the center end of the air inlet, causing the ends of the two windshield curtains 501 that extend towards the center end of the air inlet to approach or move away from each other, thereby adjusting the opening degree of the air inlet and further adjusting the air intake volume. During this process, the windshield curtain 501 maintains a certain tension and is in a taut state, and it can be prevented from being damaged by the blowing of the motor whether it is closed or retracted. The overall structure of the air-cooled unit anti-freezing mechanism is more stable, has stronger wind resistance, lower failure rate, higher stability, and longer service life.

[0042] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, specific orientation structure and operation. Therefore, it should not be construed as a limitation to the present invention. In addition, "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

[0043] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" and the like should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] The above has described a detailed description of an embodiment of the present invention, but the content described is only the preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention should still fall within the scope covered by the patent of the present invention.

Claims

1. An anti-freezing device for an air-cooling unit of a direct air-cooled condenser, comprising an air-cooled island (100), and an air inlet is arranged on the air-cooled island (100). It is characterized in that, A fan (200) for sending air to the air inlet is provided at the lower side of the air-cooled island (100), and an anti-freezing mechanism for the air-cooled unit is provided on the other side.

2. The direct air-cooled condenser air-cooling unit anti-freezing device according to claim 1, characterized in that, The anti-freezing mechanism for the air-cooled unit includes a number of anti-freezing units (500) arranged in an array on the air-cooled island (100).

3. The direct air-cooled condenser air-cooling unit anti-freezing device according to claim 2, wherein, There are three groups of the anti-freezing units (500). Among them, each group of anti-freezing units (500) includes two groups of windshields (501) symmetrically and horizontally arranged on the air inlet. One end of the windshield (501) is located on one side of the air inlet, and the other end extends towards the center end of the air inlet; the windshield (501) is connected to a driving part that drives it to extend or contract towards the center end of the air inlet.

4. The direct air-cooled condenser air-cooling unit anti-freezing device according to claim 3, characterized in that, The driving part includes: A windshield roller (502), one end of the windshield (501) is wound around the windshield roller (502), and the other end extends towards the center end of the air inlet; A wire rope roller (503), wire ropes are wound around both ends of the wire rope roller (503), and the two wire ropes respectively pass through a wire guiding mechanism and are fixedly connected to one end of the windshield (501) towards the center of the air inlet; Both the windshield roller (502) and the wire rope roller (503) are driven to rotate by motors.

5. The direct air-cooled condenser air-cooling unit anti-freezing device according to claim 4, characterized in that, The wire guiding mechanism includes a number of wire rope wheels (505), and the wire ropes pass through the number of wire rope wheels (505) and are connected to the windshield (501).

6. The direct air-cooled condenser air-cooling unit anti-freezing device according to claim 5, wherein, Guide rails (400) are provided on both sides of the windshield (501) of each group of anti-freezing units (500), the wire rope wheels (505) are installed inside the guide rails (400), and the two side edges of the windshield (501) are located inside the guide rails (400).

7. The direct air-cooled condenser air-cooling unit anti-freezing device according to claim 6, characterized in that, A number of reinforcing ribs (401) are equidistantly arranged between the two guide rails (400) on both sides of each group of anti-freezing units (500), and a number of support rods (402) are vertically installed on the number of reinforcing ribs (401).

8. The direct air-cooled condenser air-cooling unit anti-freezing device according to claim 4, characterized in that, A guide roller (504) is also provided beside the windshield roller (502), and the windshield (501) bypasses the guide roller (504) and is connected to the windshield roller (502).

9. The direct air-cooled condenser air-cooling unit anti-freezing device according to claim 8, characterized in that, Installation boxes (600) corresponding to the multiple groups of windshields (501) are installed on the air-cooled island (100), and the windshield roller (502), the wire rope roller (503) and the guide roller (504) are all located in the installation boxes (600).

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