Harmful gas ventilation system for offshore wind turbine generator

Abstract

A harmful gas ventilation system of an offshore wind turbine generator comprises an air bellow, the air bellow is perpendicularly connected with a pipe pile in an inserted mode and installed at the top of the pipe pile, an air inlet is formed in one side of the air bellow, an air outlet is formed in the other side of the air bellow, an exhaust pipe is arranged in the pipe pile, the exhaust pipe and the pipe pile are coaxially arranged, and the exhaust pipe is communicated with the air bellow. Exhaust fans are arranged on the exhaust pipe at equal intervals; according to the utility model, air flow in the foundation can circulate, external fresh air is introduced, the environment in the foundation is improved, hydrogen sulfide gas is eliminated fundamentally, and the damage rate of equipment in the fan foundation is reduced while the personal safety of operation and maintenance personnel is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power generation devices, in particular to a harmful gas ventilation system for an offshore wind turbine set. Background Art

[0002] In the current offshore wind power generation field, the foundation structure design and operation and maintenance safety of wind turbines face severe challenges, especially for wind turbines that use a single pile foundation. This foundation form is widely adopted because of its simple construction and relatively low cost, but it also brings problems that cannot be ignored. Specifically, seawater is rich in various types of plankton, and its natural decay process will accumulate high concentrations of harmful gases inside the pile foundation, among which hydrogen sulfide is particularly prominent. Hydrogen sulfide is not only extremely toxic, but can also cause serious health hazards such as hypoxia and suffocation of human cells, directly threatening the lives of offshore operation and maintenance personnel, and also posing a potential risk of pollution to the environment. Therefore, how to effectively monitor and control the accumulation of gas in the pile foundation has become a technical problem that needs to be solved urgently.

[0003] In addition, hydrogen sulfide and the corrosion problems it causes are not limited to the pile foundation structure itself, but also penetrate into the electrical system of the wind turbine. The electrical components inside the unit, including the auxiliary contacts of the circuit breaker, DC and AC contacts, the feedback contacts of the lightning protection system, and the switch fuses, may accelerate aging, damage, or even fail due to long-term exposure to the corrosive environment containing hydrogen sulfide. This will not only directly lead to the failure and shutdown of the wind turbine, increase maintenance costs, but also seriously affect the overall operating efficiency and stability of the wind turbine, thereby affecting the economic benefits of the project and the reliability of energy supply. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a harmful gas ventilation system for a wind turbine set, which can circulate the airflow in the foundation, introduce fresh air from the outside, improve the environment in the foundation, and fundamentally eliminate hydrogen sulfide gas, thereby ensuring the personal safety of operation and maintenance personnel and reducing the damage rate of equipment inside the wind turbine foundation.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A harmful gas ventilation system for an offshore wind turbine comprises a bellows, which is vertically plugged into a pipe pile and installed on the top of the pipe pile, an air inlet is provided on one side of the bellows, an air outlet is provided on the other side of the bellows, an exhaust pipe is provided in the pipe pile, the exhaust pipe is coaxially arranged with the pipe pile and communicated with the bellows, and exhaust fans are equidistantly installed on the exhaust pipe.

[0007] In a preferred embodiment, a partition is provided in the bellows, which divides the bellows into a left air outlet chamber and a right air inlet chamber. The bottom of the left air outlet chamber of the bellows is connected to the exhaust pipe, and a new air outlet is provided at the bottom of the right air inlet chamber of the bellows.

[0008] In a preferred solution, slots are provided on the upper end surface of the bellows near the left and right ports, and mesh plates are inserted into the slots.

[0009] In a preferred solution, a filter plate is plugged into the rear of the air inlet mesh plate, the filter plate is plugged into the bellows through a slot, the filter plate is filled with filter cotton, and pull rings are provided at the upper ends of the filter plate and the mesh plate.

[0010] In a preferred embodiment, the exhaust fan is installed on the outer wall of the exhaust pipe and is arranged equidistantly. An air inlet is symmetrically provided at the lower end of the exhaust fan. A gas detector is installed on the outer wall of the exhaust fan. The air outlet of the exhaust fan is connected to the exhaust pipe.

[0011] A harmful gas ventilation system for an offshore wind turbine generator set, the device has the following advantages during use:

[0012] 1. This device can discharge harmful gases in the pipe piles and tower tube in time through the exhaust system, ensuring the personal safety of the operation and maintenance personnel and effectively improving the service life of the internal electrical equipment;

[0013] 2. This device can accurately monitor the concentration and distribution of harmful gases in sections by equidistantly arranging exhaust fans and gas detectors on the exhaust pipe, and can quickly extract harmful gases in sections, which saves energy waste and improves the exhaust efficiency of harmful gases;

[0014] 3. This device sets mesh plates at the air inlet and outlet, which can effectively prevent external flying catkins from entering the tower. The mesh plates adopt a pull-out structure to facilitate later replacement and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0016] Figure 1 It is a schematic diagram of the external structure of the utility model;

[0017] Figure 2 This is an internal cross-sectional view of the overall structure of the utility model;

[0018] Figure 3 This is an enlarged schematic diagram of the installation structure of the mesh plate and the filter plate of the utility model;

[0019] Figure 4 It is an enlarged schematic diagram of the exhaust fan structure of the utility model.

[0020] In the figure: pipe pile 1, bellows 2, air outlet 3, air inlet 4, partition 5, fresh air outlet 6, exhaust pipe 7, exhaust fan 8, slot 9, mesh plate 10, filter plate 11, pull ring 12, air inlet 13, gas detector 14. DETAILED DESCRIPTION

[0021] like Figure 1 and Figure 2 As shown, a harmful gas ventilation system for an offshore wind turbine includes a bellows 2, which is vertically plugged into a pipe pile 1 and installed on the top of the pipe pile 1, an air inlet 4 is opened on one side of the bellows 2, and an air outlet 3 is opened on the other side of the bellows 2. An exhaust pipe 7 is arranged in the pipe pile 1, and the exhaust pipe 7 is coaxially arranged with the pipe pile 1 and connected with the bellows 2, and exhaust fans 8 are equidistantly installed on the exhaust pipe 7; during the operation of the device, the harmful gas in the pipe pile 1, especially hydrogen sulfide gas, can be extracted into the exhaust pipe 7 through the exhaust fan 8, and finally transported to the bellows 2 through the exhaust pipe 7 and finally discharged from the air outlet 3.

[0022] The preferred solution is Figure 2 As shown, a partition 5 is provided in the wind box 2, and the partition 5 divides the wind box 2 into a left air outlet chamber and a right air inlet chamber. The bottom of the left air outlet chamber of the wind box 2 is connected to the exhaust pipe 7, and the bottom of the right air inlet chamber of the wind box 2 is provided with a fresh air outlet 6;

[0023] The harmful gas is transported to the left air outlet chamber through the exhaust pipe 7 and discharged from the side air outlet 3. The external air enters the right air inlet chamber after being filtered and is transported to the inside of the tower and the pipe piles through the fresh air inlet 6.

[0024] The preferred solution is Figure 3 As shown, a slot 9 is provided on the upper end surface of the wind box 2 near the left and right ports, and a mesh plate 10 is inserted into the slot 9; through the above structure, flying catkins in the air can be isolated outside to prevent entering the tower and pipe piles to affect the normal operation of electrical equipment.

[0025] The preferred solution is Figure 3 As shown, a filter plate 11 is inserted at the rear of the mesh plate 10 of the air inlet 4, and the filter plate 11 is inserted with the bellows 2 through the slot 9. The filter plate 11 is filled with filter cotton, and a pull ring 12 is provided at the upper end of the filter plate 11 and the mesh plate 10; the middle part of the filter plate 11 is filled with filtering material, which can effectively filter harmful gases, especially hydrogen sulfide gas, to prevent it from circulating again into the pipe pile. By providing a pull ring 12 at the upper end of the filter plate 11 and the mesh plate 10, it is convenient to quickly pull them out of the bellows 2, so as to replace and clean the filter plate 11 and the mesh plate 10 later.

[0026] The preferred solution is Figure 4As shown, the exhaust fan 8 is installed on the outer wall of the exhaust pipe 7 and is arranged equidistantly, the lower end of the exhaust fan 8 is provided with an air inlet 13 in an annular symmetric manner, a gas detector 14 is installed on the outer wall of the exhaust fan 8, and the air outlet of the exhaust fan 8 is connected to the exhaust pipe 7;

[0027] The exhaust fan 8 adopts two control operation modes, namely, a circulation operation mode and a precision operation mode;

[0028] When the circulation operation mode is adopted, the exhaust fan 8 on the exhaust pipe 7 is circulated from bottom to top in sequence, and each operation is 30 minutes. The exhaust fan 8 adopts external power supply or battery power supply mode;

[0029] When the precise operation mode is adopted, the gas detector 14 outside the exhaust fan 8 of each layer will monitor the harmful gas concentration of the layer in real time. When it is detected that the harmful gas concentration of the layer exceeds the standard (usually 0.2ppm), the exhaust fan 8 of the layer will start and absorb and discharge the harmful air. When it is detected that the harmful gas concentration of the layer reaches the normal value (usually lower than 0.1ppm), the exhaust fan 8 of the layer will be shut down to save electricity consumption.

Claims

1. A harmful gas ventilation system for an offshore wind turbine, comprising a wind box (2), characterized in that: The bellows (2) is vertically plugged into the pipe pile (1) and is installed on the top of the pipe pile (1). An air inlet (4) is provided on one side of the bellows (2), and an air outlet (3) is provided on the other side of the bellows (2). An exhaust pipe (7) is provided inside the pipe pile (1). The exhaust pipe (7) is coaxially arranged with the pipe pile (1) and is connected to the bellows (2). Exhaust fans (8) are equidistantly installed on the exhaust pipe (7).

2. The harmful gas ventilation system for offshore wind turbines according to claim 1 is characterized in that: A partition (5) is provided inside the wind box (2), and the partition (5) divides the wind box (2) into a left air outlet chamber and a right air inlet chamber. The bottom of the left air outlet chamber of the wind box (2) is connected to an exhaust pipe (7), and a new air outlet (6) is provided at the bottom of the right air inlet chamber of the wind box (2).

3. The harmful gas ventilation system for offshore wind turbines according to claim 1 is characterized in that: A slot (9) is provided on the upper end surface of the bellows (2) near the left and right ports, and a mesh plate (10) is inserted into the slot (9).

4. The harmful gas ventilation system for offshore wind turbines according to claim 3 is characterized in that: A filter plate (11) is plugged into the rear of the air inlet (4) mesh plate (10), the filter plate (11) being plugged into the air box (2) via a slot (9), the filter plate (11) being filled with filter cotton, and pull rings (12) being provided at the upper ends of the filter plate (11) and the mesh plate (10).

5. The harmful gas ventilation system for offshore wind turbines according to claim 1 is characterized in that: The exhaust fan (8) is installed on the outer wall of the exhaust pipe (7) and is arranged at equal distances. An air inlet (13) is symmetrically provided at the lower end of the exhaust fan (8). A gas detector (14) is installed on the outer wall of the exhaust fan (8). The air outlet of the exhaust fan (8) is connected to the exhaust pipe (7).

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