A device and control method for emitting harmful gases at the base of an offshore wind turbine tower

Abstract

This invention discloses a harmful gas emission device and control method at the bottom of an offshore wind turbine tower, belonging to the field of wind turbine technology. It includes a data acquisition system, a gas concentration sensor, a purification and exhaust assembly, a control system, and a remote database and server. After establishing an exhaust strategy through the data acquisition system, this invention uses intermittent activation of the purification and exhaust assembly for exhaust, effectively shortening the operating time of the assembly, controlling the concentration of harmful gases inside the tower, and preventing the tower bottom from being in a high-concentration environment for extended periods. The gas concentration sensor ensures that the concentration of harmful gases inside the tower remains within a reasonable range. The purification and exhaust assembly employs an innovative flow channel design: an inlet filter to prevent impurities, and an outlet check valve combined with a low-position sealing through-door arrangement, ensuring efficient and directional discharge of harmful gases, preventing backflow of sea winds and re-escape of harmful gases into the tower, thus balancing emission efficiency and equipment protection.

Description

Technical Field

[0001] This invention belongs to the field of wind turbine technology, specifically relating to a harmful gas emission device and control method at the bottom of an offshore wind turbine tower. Background Technology

[0002] Offshore wind turbine towers are installed above sea level. The interior of the tower is a closed, isolated space. A large amount of harmful gases are generated in the seabed silt and escape into the tower. These harmful gases accumulate at the bottom of the tower, which leads to the deterioration of the air quality inside the tower. This not only threatens the health and safety of maintenance personnel, but also damages the instruments and equipment inside the tower, affecting the normal operation of the wind turbine tower. Long-term accumulation may even pose a risk of explosion.

[0003] Currently, the main method for venting harmful gases inside the tower is passive exhaust. As harmful gases accumulate at the bottom of the tower over time, the gas pressure continuously increases. The gas is then directly discharged outside the tower through the pressure difference between the harmful gases and atmospheric pressure. Although this method can remove some harmful gases, it cannot solve the problem of harmful gas accumulation, leaving the bottom of the tower in a high-concentration environment of harmful gases for a long time. Summary of the Invention

[0004] To address some or all of the technical problems existing in the prior art, the present invention provides a hazardous gas emission device at the base of an offshore wind turbine tower. The wind turbine tower contains an inner foundation platform and a tower base platform. The hazardous gas emission device at the base of the offshore wind turbine tower includes: A data acquisition system, which is installed on the basic platform, is used to collect information on changes in the concentration of harmful gases and to formulate exhaust strategies. A gas concentration sensor is installed at the bottom of the tower to monitor the concentration of harmful gases inside the tower in real time and send the data to a remote database. The exhaust purification assembly includes: an exhaust flange, a first air guide duct, a gas removal device, and a second air guide duct. The exhaust flange is installed on the inner platform of the foundation. The first air guide duct is fixedly installed on the side wall of the tower in the vertical direction by a pipe clamp and penetrates the tower base platform. One end of the first air guide duct is sealed to the exhaust flange, and the other end of the first air guide duct is equipped with a filter screen and connected to the air intake of the gas removal device. The gas removal device is installed on the tower base platform and close to the side wall of the tower. The second air guide duct is laid along the arc of the tower. One end of the second air guide duct is equipped with a check valve and connected to the exhaust port of the gas removal device. The other end of the second air guide duct is sealed to the tower door and extends out of the tower door, with a height lower than the exhaust port height of the gas removal device. A control system is installed on the tower base platform to control the start and stop of the purification and exhaust components. The control system is electrically connected to the gas concentration sensor and the purification and exhaust components. A remote database and server, which is deployed on a remote PC, is used to monitor the system operation in real time, remotely control the start and stop of the exhaust purification components, retrieve and access historical data, and optimize the exhaust strategy.

[0005] Furthermore, the output signal of the gas concentration sensor is either a digital signal or an analog signal.

[0006] Furthermore, the control system is also equipped with a manual control button, which is used to manually control the start and stop of the purification exhaust component.

[0007] In one specific embodiment, the gas removal device is any one of a blower, a gas adsorption device, or a gas reaction device.

[0008] In another aspect of the present invention, the provided method for controlling harmful gas emission devices at the base of offshore wind turbine towers includes: Step S1: Collect information on changes in the concentration of harmful gases through the data acquisition system and formulate corresponding exhaust strategies. After the exhaust strategies are formulated, dismantle and recycle the data acquisition system. Step S2: Execute the main program of the exhaust strategy in a loop, and simultaneously monitor the concentration of harmful gases inside the tower in real time through the gas concentration sensor. When the concentration of harmful gases is detected to be greater than the set threshold a0, insert the interrupt subroutine of the exhaust strategy to start the purification exhaust component until the concentration of harmful gases is less than the set threshold b0, then shut down the purification exhaust component and terminate the interrupt subroutine of the exhaust strategy. Step S3: Periodically optimize the exhaust strategy based on historical data on changes in the concentration of harmful gases.

[0009] Furthermore, the main program for the exhaust strategy includes: Step Z1: Check if it is in manual mode. If it is in manual mode, manually input the control command. If it is not in manual mode, start the exhaust device for m hours and then turn off the exhaust device for n hours. Step Z2: During the n hours of shutting down the exhaust device, check if there is an interrupt request. If there is an interrupt request, jump to execute the interrupt subroutine. If there is no interrupt request, re-execute the process of starting the exhaust device for m hours and then shutting it down for n hours.

[0010] Furthermore, the interrupt subroutine for the exhaust strategy includes: Step D1: Input the preset alarm threshold a0 and alarm exit threshold b0 into the system; Step D2: Check if the concentration of harmful gas is greater than the alarm threshold a0. If the concentration of harmful gas is greater than the alarm threshold a0, issue an interruption request, issue an over-limit alarm signal, and force the exhaust device to start working. Step D3: Check if the concentration of harmful gas is less than the exit alarm threshold b0. If the concentration of harmful gas is not less than the exit alarm threshold b0, maintain the on state of the purification and exhaust component. If the concentration of harmful gas is less than the exit alarm threshold b0, turn off the purification and exhaust component and terminate the interrupt subroutine of the exhaust strategy.

[0011] The harmful gas emission device and control method at the bottom of the offshore wind turbine tower of the present invention have the following advantages and beneficial effects: This invention establishes an exhaust strategy through a data acquisition system and then uses intermittent activation of the purification exhaust component for exhaust, effectively shortening the working time of the purification exhaust component, controlling the concentration of harmful gases inside the tower, and preventing the bottom of the tower from being in a high-concentration environment of harmful gases for a long time. By setting up a gas concentration sensor, it ensures that the concentration of harmful gases inside the tower is within a reasonable range. The purification exhaust component adopts an innovative flow channel design: inlet filtration to prevent impurities, and outlet check valve combined with a low-position sealing through-door arrangement to ensure efficient and directional discharge of harmful gases, preventing backflow of sea breeze and re-escape of harmful gases into the tower, thus balancing emission efficiency and equipment protection. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for further understanding of the embodiments of the present invention and constitute a part of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings: Figure 1 This is a schematic diagram of the main structure of the harmful gas emission device at the bottom of the offshore wind turbine tower of the present invention; Figure 2 yes Figure 1 Enlarged structural diagram at point A in the middle; Figure 3 This is a top view of the harmful gas emission device at the bottom of the offshore wind turbine tower of the present invention; Figure 4 This is a schematic diagram of the structural composition of the hazardous gas emission device at the bottom of the offshore wind turbine tower of the present invention; Figure 5 This is a flowchart illustrating the control method for the harmful gas emission device at the bottom of the offshore wind turbine tower according to the present invention.

[0013] Explanation of reference numerals in the attached figures: 01. Foundation inner platform; 02. Tower base platform; 03. Tower sidewall; 1. Data acquisition system; 2. Gas concentration sensor; 3. Exhaust flange; 4. Guide gas duct one; 5. Gas exhaust device; 6. Guide gas duct two; 7. Pipe rack; 8. Filter screen; 9. Check valve; 10. Tower door; 11. Control system. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0015] like Figure 1-4 As shown, the present invention provides a hazardous gas emission device at the base of an offshore wind turbine tower. The wind turbine tower contains an inner foundation platform 01 and a tower base platform 02. The hazardous gas emission device at the base of the offshore wind turbine tower includes: Data acquisition system 1, which is set on the basic internal platform 01, is used to collect information on changes in the concentration of harmful gases and formulate exhaust strategies. Gas concentration sensor 2, which is installed at the bottom of the tower, is used to monitor the concentration of harmful gases inside the tower in real time and send the data to a remote database. The exhaust purification assembly includes: an exhaust flange 3, a first air guide duct 4, a gas removal device 5, and a second air guide duct 6. The exhaust flange 3 is installed on the inner platform 01 of the foundation. The first air guide duct 4 is fixedly installed on the side wall 03 of the tower in the vertical direction by a pipe clamp and passes through the tower base platform 02. One end of the first air guide duct 4 is sealed to the exhaust flange 3. The other end of the first air guide duct 4 is equipped with a filter screen 8 and is connected to the air intake of the gas removal device 5. The gas removal device 5 is installed on the tower base platform 02 and close to the side wall 03 of the tower. The second air guide duct 6 is laid along the arc of the tower. One end of the second air guide duct 6 is equipped with a check valve 9 and is connected to the exhaust port of the gas removal device 5. The other end of the second air guide duct 6 is sealed to the tower door 10 and extends out of the tower door 10 and is set at a height lower than the exhaust port height of the gas removal device 5. Control system 11, which is installed on the tower base platform 02, is used to control the start and stop of the purification exhaust component. The control system 11 is electrically connected to the gas concentration sensor 2 and the purification exhaust component. A remote database and server, which is deployed on a remote PC, is used to monitor the system operation in real time, remotely control the start and stop of the exhaust purification components, retrieve and access historical data, and optimize the exhaust strategy.

[0016] Before emitting harmful gases, the data acquisition system 1 is used to collect information on changes in the concentration of harmful gases and formulate an exhaust strategy. This provides an exhaust strategy for the initial stage of harmful gas emission, ensuring the smooth execution of the initial exhaust action. After the exhaust strategy is formulated, since the data acquisition system 1 does not participate in the subsequent exhaust action, it is disassembled and recycled, thus achieving the recycling of the data acquisition system 1 and effectively saving costs.

[0017] After formulating the exhaust strategy, the automatic emission of harmful gases inside the tower was achieved by cyclically opening and closing the purification exhaust components. This effectively controlled the concentration of harmful gases inside the tower, preventing the bottom of the tower from being in a high-concentration environment for a long time. This provided sufficient protection for the health and safety of maintenance personnel and prevented harmful gases from damaging the instruments inside the tower, thus extending the service life of the instruments. The intermittent opening and closing of the purification exhaust components effectively shortened their working time and saved energy.

[0018] By setting the control system 11 on the tower base platform 02, it is convenient to connect circuit signals and perform maintenance control, which effectively improves maintenance efficiency.

[0019] By setting up gas concentration sensor 2, the concentration of harmful gases inside the tower is monitored in real time. When the concentration of harmful gases is too high, forced exhaust and alarm are triggered in a timely manner, further ensuring that the concentration of harmful gases inside the tower is within a reasonable range.

[0020] By setting up a remote database and server, the operation monitoring and remote control of the tower exhaust action are realized, improving maintenance and control efficiency. By recording historical data, the exhaust strategy is autonomously optimized, thereby achieving stability in the control of harmful gas concentration. By collecting long-term operating data from multiple units in the same wind farm, the exhaust strategy can be efficiently optimized. When the exhaust strategy is optimized to a certain extent, the concentration of harmful gas in the tower will always be lower than the set threshold. At this time, the gas concentration sensor 2 can be removed, thereby further reducing the operating cost of the harmful gas emission device.

[0021] By installing a filter screen 8 on the first air guide duct 4, impurities can be prevented from being accidentally sucked into the exhaust device and affecting the operation of the exhaust system. By setting a check valve 9 at the exhaust port of the second air guide duct 6, the backflow of sea air with high salinity and corrosiveness can be prevented, ensuring that the protective performance of the wind turbine tower is not affected while harmful gases are discharged. By sealing the second air guide duct 6 with the tower door 10, the discharged harmful gases can be prevented from escaping into the tower, ensuring the emission effect of harmful gases.

[0022] Furthermore, the output signal of the gas concentration sensor 2 is a switching signal or an analog signal.

[0023] When the sensor output signal is a switch signal, the remote database switches between three different states: normal, abnormal, and working. When the sensor output signal is an analog signal, the remote database displays the real-time concentration of harmful gases inside the tower.

[0024] Furthermore, the control system 11 is also provided with a manual control button, which is used to manually control the start and stop of the purification exhaust component.

[0025] In one specific implementation, the gas removal device 5 can be any one of a blower, a gas adsorption device, or a gas reaction device.

[0026] By selecting from a variety of gas removal devices 5, multiple functions can be achieved as required, such as adsorbing harmful gases or reacting with harmful gases to convert them into pollution-free products.

[0027] like Figure 5 As shown, the method for controlling harmful gas emission devices at the base of offshore wind turbine towers provided by the present invention includes: Step S1: Collect information on changes in the concentration of harmful gases through the data acquisition system 1 and formulate an exhaust strategy accordingly. After the exhaust strategy is formulated, dismantle and recycle the data acquisition system 1. Step S2: The main program of the exhaust strategy is executed in a loop, and the concentration of harmful gas inside the tower is monitored in real time through the gas concentration sensor 2. When the concentration of harmful gas is detected to be greater than the set threshold a0, the interrupt subroutine for executing the exhaust strategy is inserted to start the purification exhaust component until the concentration of harmful gas is less than the set threshold b0, at which point the purification exhaust component is shut down and the interrupt subroutine for executing the exhaust strategy is terminated. Step S3: Periodically optimize the exhaust strategy based on historical data on changes in the concentration of harmful gases.

[0028] The main program's cyclic execution enables periodic removal of harmful gases. Furthermore, the conditional triggering of the additional interrupt subroutine allows for timely responses when the concentration of harmful gases exceeds the limit, ensuring that the concentration of harmful gases inside the tower can be effectively controlled within a safe range under any operating conditions.

[0029] By regularly optimizing the exhaust strategy, the exhaust strategy can be adapted to the generation of harmful gases, effectively reducing the number of temporary exhausts. When the exhaust strategy is optimized to a certain extent, the concentration of harmful gases in the tower will always be lower than the set threshold. At this time, the gas concentration sensor 2 can be removed, thereby further reducing the operating cost of the harmful gas emission device.

[0030] By adopting an intermittent operation mode, the working time of the exhaust purification components is effectively shortened, thus saving energy.

[0031] Furthermore, the main program for the exhaust strategy includes: Step Z1: Check if it is in manual mode. If it is in manual mode, manually input the control command. If it is not in manual mode, start the exhaust device for m hours and then turn off the exhaust device for n hours. Step Z2: During the n hours of shutting down the exhaust device, check if there is an interrupt request. If there is an interrupt request, jump to execute the interrupt subroutine. If there is no interrupt request, re-execute the process of starting the exhaust device for m hours and then shutting it down for n hours.

[0032] Furthermore, the interrupt subroutine for the exhaust strategy includes: Step D1: Input the preset alarm threshold a0 and alarm exit threshold b0 into the system; Step D2: Check if the concentration of harmful gas is greater than the alarm threshold a0. If the concentration of harmful gas is greater than the alarm threshold a0, issue an interruption request, issue an over-limit alarm signal, and force the exhaust device to start working. Step D3: Check if the concentration of harmful gas is less than the exit alarm threshold b0. If the concentration of harmful gas is not less than the exit alarm threshold b0, maintain the on state of the purification and exhaust component. If the concentration of harmful gas is less than the exit alarm threshold b0, turn off the purification and exhaust component and terminate the interrupt subroutine of the exhaust strategy.

[0033] The value of the exit alarm threshold b0 is less than the value of the alarm threshold a0.

[0034] By setting alarm threshold a0 and exit alarm threshold b0, a complete closed-loop control logic is formed, which effectively avoids frequent start-stop of the purification exhaust component, ensures the thoroughness of emergency exhaust, and prevents damage to the purification exhaust component due to frequent start-stop in a short period of time.

[0035] It should be noted that, unless otherwise expressly specified and limited, the term "connection" or its synonyms should be interpreted broadly in this document. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. Furthermore, expressions such as "first" and "second" are merely used to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Meanwhile, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. In addition, the terms "front," "rear," "left," "right," "upper," and "lower" in this document refer to the placement states shown in the accompanying drawings.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A harmful gas emission device at the base of an offshore wind turbine tower, characterized in that, The wind turbine tower is equipped with an inner foundation platform (01) and a tower base platform (02). The hazardous gas emission device at the bottom of the offshore wind turbine tower includes: A data acquisition system (1) is installed on the basic platform (01) and is used to collect information on changes in the concentration of harmful gases and formulate exhaust strategies. Gas concentration sensor (2), which is installed at the bottom of the tower, is used to monitor the concentration of harmful gases inside the tower in real time and send it to a remote database; The exhaust purification assembly includes: an exhaust flange (3), a first air guide duct (4), a gas removal device (5), and a second air guide duct (6). The exhaust flange (3) is installed on the inner platform (01) of the foundation. The first air guide duct (4) is fixedly installed on the side wall (03) of the tower in the vertical direction by a pipe clamp and penetrates the tower base platform (02). One end of the first air guide duct (4) is sealed to the exhaust flange (3), and the other end of the first air guide duct (4) is equipped with a filter screen (8) and is connected to the exhaust flange. The gas exhaust device (5) is connected to the air intake port. The gas exhaust device (5) is installed on the tower base platform (02) and close to the side wall (03) of the tower. The second guide air duct (6) is laid along the arc of the tower. One end of the second guide air duct (6) is equipped with a check valve (9) and is connected to the exhaust port of the gas exhaust device (5). The other end of the second guide air duct (6) is sealed to the tower door (10) and extends out of the tower door (10) and is set at a height lower than the exhaust port of the gas exhaust device (5). A control system (11) is installed on the tower base platform (02) to control the start and stop of the purification exhaust component. The control system (11) is electrically connected to the gas concentration sensor (2) and the purification exhaust component. A remote database and server, which is deployed on a remote PC, is used to monitor the system operation in real time, remotely control the start and stop of the exhaust purification components, retrieve and access historical data, and optimize the exhaust strategy.

2. The hazardous gas emission device at the base of the offshore wind turbine tower according to claim 1, characterized in that, The output signal of the gas concentration sensor (2) is a switching signal or an analog signal.

3. The hazardous gas emission device at the base of the offshore wind turbine tower according to claim 1, characterized in that, The control system (11) is also provided with a manual control button, which is used to manually control the start and stop of the purification exhaust component.

4. The hazardous gas emission device at the base of the offshore wind turbine tower according to claim 1, characterized in that, The gas removal device (5) is any one of a blower, a gas adsorption device, or a gas reaction device.

5. A method for controlling harmful gas emission devices at the base of offshore wind turbine towers, implemented using any one of claims 1 to 4, characterized in that, include: Step S1: Collect information on changes in the concentration of harmful gases through the data acquisition system (1) and formulate an exhaust strategy accordingly. After the exhaust strategy is formulated, dismantle and recycle the data acquisition system (1). Step S2: Execute the main program of the exhaust strategy in a loop, and simultaneously monitor the concentration of harmful gas inside the tower in real time through the gas concentration sensor (2). When the concentration of harmful gas is detected to be greater than the set threshold a0, insert the interrupt subroutine of the exhaust strategy to start the purification exhaust component until the concentration of harmful gas is less than the set threshold b0, then shut down the purification exhaust component and terminate the interrupt subroutine of the exhaust strategy. Step S3: Periodically optimize the exhaust strategy based on historical data on changes in the concentration of harmful gases.

6. The method for controlling harmful gas emission devices at the base of offshore wind turbine towers according to claim 5, characterized in that, The main program for the exhaust strategy includes: Step Z1: Check if it is in manual mode. If it is in manual mode, manually input the control command. If it is not in manual mode, start the exhaust device for m hours and then turn off the exhaust device for n hours. Step Z2: During the n hours of shutting down the exhaust device, check if there is an interrupt request. If there is an interrupt request, jump to execute the interrupt subroutine. If there is no interrupt request, re-execute the process of starting the exhaust device for m hours and then shutting it down for n hours.

7. The method for controlling harmful gas emission devices at the base of offshore wind turbine towers according to claim 5, characterized in that, The interrupt subroutine for the exhaust strategy includes: Step D1: Input the preset alarm threshold a0 and alarm exit threshold b0 into the system; Step D2: Check if the concentration of harmful gas is greater than the alarm threshold a0. If the concentration of harmful gas is greater than the alarm threshold a0, issue an interruption request, issue an over-limit alarm signal, and force the exhaust device to start working. Step D3: Check if the concentration of harmful gas is less than the exit alarm threshold b0. If the concentration of harmful gas is not less than the exit alarm threshold b0, maintain the on state of the purification and exhaust component. If the concentration of harmful gas is less than the exit alarm threshold b0, turn off the purification and exhaust component and terminate the interrupt subroutine of the exhaust strategy.

Images