Offshore wind turbine generator single pile structure and hydrogen sulfide gas treatment system and method

Abstract

The invention discloses an offshore wind turbine generator single pile structure and a hydrogen sulfide gas treatment system and method, and relates to the technical field of offshore wind turbine generator hydrogen sulfide gas treatment.The offshore wind turbine generator single pile structure comprises a single pile body used for providing stable support for a wind turbine generator; a containing space is formed in the single pile body, and an equipment carrying base table is arranged in the containing space. The complete chemical reaction system is established, the current offshore wind power hydrogen sulfide gas is captured and treated, the concentration of the hydrogen sulfide gas is not limited, and real-time capturing and treatment can be achieved. The gas diffusion principle is fully utilized, external corrosive gas is prevented from being directly introduced into the tower drum, the risk that the external corrosive gas escapes in the tower drum due to poor sealing of a platform in the foundation is eradicated, and meanwhile micro-positive pressure in the tower drum is kept all the time; and equipment corrosion caused by backward flowing of marine gas outside the offshore wind turbine generator in the hydrogen sulfide gas capturing process is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore wind power hydrogen sulfide gas treatment, and in particular to an offshore wind turbine unit monopile structure, a hydrogen sulfide gas treatment system and a method. Background Art

[0002] First, the rate and content of hydrogen sulfide generation are calculated. The analysis is based on the data obtained from field collection after the actual installation of a certain offshore wind power station. The test data is shown in Figure 1 , where the unit of hydrogen sulfide gas content is ppm.

[0003] The measured data show that hydrogen sulfide gas from offshore wind power monopile has the following characteristics:

[0004] 1) The generation of hydrogen sulfide gas is greatly affected by the ambient temperature, and it generally shows a wave-like rise and fall. The gas content is usually on the rise from 11:00 to 15:00, but this time period is the golden time for operation and maintenance personnel to conduct maintenance.

[0005] 2) According to statistics, the peak levels of hydrogen sulfide gas from February 24 to March 4, 2023 were 34ppm, 24ppm, 25ppm, 16ppm, 14ppm, 10ppm, 10ppm, 8ppm, and 9ppm respectively. The fastest generation rate of hydrogen sulfide gas can reach 4.25ppm / h. Therefore, the device must have the ability to quickly dispose of hydrogen sulfide gas.

[0006] 3) The hydrogen sulfide content is far higher than the normal value, and the highest value tested is 35ppm. According to the industry requirement, "the hydrogen sulfide concentration is less than 10mg / m 3 , implement safety protection measures and on-site warning signs, and only enter the confined space after obtaining a permit for work."

[0007] There have been many cases of hydrogen sulfide gas poisoning in the power industry. Therefore, how to deal with the hydrogen sulfide gas inside the tower in a timely manner to protect the safety of workers inside the tower, and to prevent the hydrogen sulfide gas from spreading inside the tower and causing corrosion of equipment inside the tower, has become an urgent problem for the offshore wind power industry. Summary of the invention

[0008] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0009] The problem to be solved by the present invention is that hydrogen sulfide gas diffuses inside the tower, endangering the safety of workers inside the tower and causing corrosion of tower equipment.

[0010] In order to solve the above technical problems, the present invention provides the following technical solutions: a single pile structure of an offshore wind turbine, comprising a single pile body, which is used to provide stable support for the wind turbine; a housing space is arranged inside the single pile body, and an equipment mounting base is arranged inside the housing space, and the equipment mounting base divides the housing space into an equipment area located above the equipment mounting base, and an H2S gas enrichment area located below the equipment mounting base; a tower door intersecting the housing space is arranged on the side wall of the single pile body, which is used for allowing operators to enter and exit the equipment area.

[0011] As a preferred solution of the monopile structure of the offshore wind turbine generator set described in the present invention, the monopile body is arranged perpendicular to the sea level, and the bottom end of the monopile body extends into the seabed.

[0012] As a preferred solution of the monopile structure of the offshore wind turbine generator set described in the present invention, the overall structure of the monopile body is columnar, truncated cone or prism-shaped.

[0013] As a preferred solution of the monopile structure of the offshore wind turbine generator set described in the present invention, the overall structure of the monopile body is columnar, truncated cone or prism-shaped.

[0014] A hydrogen sulfide gas treatment system applied to the monopile structure of an offshore wind turbine, comprising: a reaction well, which is used to displace sulfur ions in H2S gas, and the reaction well is arranged on the surface of a base on which the equipment is mounted; and an exhaust assembly, which comprises a first blower, and an exhaust pipe connecting the first blower and the reaction well, the first blower being used to extract H2S gas in an H2S gas-enriched area, and transporting the H2S gas to the reaction well through the exhaust pipe; wherein a reaction chamber containing a trivalent iron ion solution is provided in the reaction well, one end of the exhaust pipe is connected to the reaction well and communicated with the reaction chamber, and the other end of the exhaust pipe extends to the bottom of the H2S gas-enriched area.

[0015] As a preferred solution of the hydrogen sulfide gas treatment system of the present invention, the surface of the first blower is coated with corrosion-resistant Teflon material.

[0016] As a preferred embodiment of the hydrogen sulfide gas treatment system of the present invention, the system further includes an oxygen supply component, which includes a second blower, and an oxygen supply pipe connecting the second blower and the reaction well, one end of the oxygen supply pipe is connected to the reaction well and communicated with the reaction chamber, and the other end of the oxygen supply pipe is connected to the oxygen chamber or directly communicated with the external air.

[0017] As a preferred embodiment of the hydrogen sulfide gas treatment system of the present invention, the system further comprises a reinjection air duct, one end of which is connected to the upper air outlet of the reaction well and communicates with the reaction chamber, and the other end of which extends to the H2S gas enrichment area.

[0018] As a preferred embodiment of the hydrogen sulfide gas treatment system of the present invention, the system further comprises a waste collection assembly, which comprises a circulation pipe, and a sulfur collecting box and a water pump sequentially arranged on the circulation pipe along the liquid flow direction; the lower part of the reaction well is an inverted cone structure and a slag discharge port is arranged at the bottom, one end of the circulation pipe is connected to the slag discharge port, and the other end of the circulation pipe is connected to the middle part of the reaction well and communicated with the reaction chamber.

[0019] As a preferred solution of the hydrogen sulfide gas treatment system of the present invention, the surface of the sulfur collection box is provided with an observation window capable of observing the inside of the sulfur collection box from the outside, and at least one set of filter membranes arranged at the outlet of the sulfur collection box is provided in the sulfur collection box.

[0020] As a preferred solution of the hydrogen sulfide gas treatment system of the present invention, the observation window is made of a transparent material and is in a flat plate shape.

[0021] As a preferred solution of the hydrogen sulfide gas treatment system of the present invention, the pore size of the filter membrane is 0.01 mm to 10 mm.

[0022] As a preferred solution of the hydrogen sulfide gas treatment system of the present invention, the system further includes a monitoring component, which includes a sensor element for monitoring the concentration of hydrogen sulfide gas, and a relay electrically connecting the sensor element and the system equipment and used to start the system equipment.

[0023] As a preferred solution of the hydrogen sulfide gas treatment system of the present invention, the sensor element includes a first sensor arranged in the equipment area and located at the tower door, and a second sensor arranged in the H2S gas enrichment area.

[0024] A hydrogen sulfide gas treatment method based on the hydrogen sulfide gas treatment system comprises the following steps:

[0025] S1: Arrange H2S gas concentration monitoring points in the accommodation space of the monopile body and install sensors for monitoring H2S gas concentration;

[0026] S2: Set the sensor concentration warning value;

[0027] S3: When the monitoring value exceeds the warning value, the system equipment starts to extract the H2S gas in the accommodation space into the reaction well and undergoes a chemical reaction to replace the elemental sulfur precipitate;

[0028] S4: Reinjecting sulfur-free gas into the accommodating space;

[0029] S5: Collect the elemental sulfur precipitate to obtain sulfur as a byproduct.

[0030] As a preferred embodiment of the hydrogen sulfide gas treatment method of the present invention, the arrangement of H2S gas concentration monitoring points in the accommodating space of the single pile body and the installation of sensors for monitoring H2S gas concentration include: arranging at least two concentration monitoring points and installing a first sensor and a second sensor at the two concentration monitoring points, respectively.

[0031] As a preferred solution of the hydrogen sulfide gas treatment method of the present invention, wherein: the two concentration monitoring points include a first monitoring point arranged in the equipment area, and a second monitoring point arranged in the H2S gas enrichment area;

[0032] Wherein, the position of the first monitoring point is set near the tower door of the single pile body.

[0033] As a preferred solution of the hydrogen sulfide gas treatment method of the present invention, wherein: the setting of the sensor concentration warning value includes setting the first sensor concentration warning value to 6 ppm, and setting the second sensor concentration warning value to 10 ppm.

[0034] As a preferred embodiment of the hydrogen sulfide gas treatment method of the present invention, the steps of extracting the H2S gas in the accommodating space into the reaction well and performing a chemical reaction to replace the elemental sulfur precipitate specifically include the following steps:

[0035] S301: When the monitoring value exceeds the warning value, the first blower is started to extract H2S gas into the reaction well to react with the valent iron ion solution for absorption;

[0036] S302: When the monitoring value exceeds the warning value, the second blower starts to extract O2 gas into the reaction well and Fe 2+ The solution undergoes an oxidation regeneration reaction.

[0037] The beneficial effects of the present invention are as follows: 1) The present invention captures and processes hydrogen sulfide gas from offshore wind power plants by establishing a complete chemical reaction system, which has no limit on the concentration of hydrogen sulfide gas and can be captured and disposed of in real time. The diffusion principle of gas is fully utilized to avoid directly introducing external corrosive gas into the tower, and the risk of external corrosive gas escaping in the tower due to poor sealing of the platform inside the foundation is eliminated. At the same time, a slight positive pressure is always maintained inside the tower to avoid backflow of marine gas outside the offshore wind turbine during the process of capturing hydrogen sulfide gas, which causes equipment corrosion.

[0038] 2) Relying on the tower environment and corrosion measurement points, a tower microenvironment model is established. This part of the data is linked with the device, coupled with multiple factors such as day, night, and temperature, and the initial slope of hydrogen sulfide gas production is set (the initial slope is set according to 4.25ppm / h during the actual measurement period), the marginal cost of device startup, the historical hydrogen sulfide trend of gas content, the hydrogen sulfide gas content in the same period, and the optimal threshold and other parameters. By processing historical data, the future hydrogen sulfide gas production situation is predicted to avoid frequent start and stop of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0040] Figure 1 This is the measured data of hydrogen gas content in an offshore wind power plant.

[0041] Figure 2 It is a schematic diagram of the overall structure of the single pile structure of the offshore wind turbine unit according to the present invention.

[0042] Figure 3 It is a schematic diagram of the overall structure of the hydrogen sulfide gas treatment system of the present invention.

[0043] Figure 4 It is a structural schematic diagram of the offshore wind turbine monopile structure and the hydrogen sulfide gas treatment system according to the present invention.

[0044] Figure 5 This is a power supply logic diagram of the hydrogen sulfide gas treatment system of the present invention.

[0045] Figure 6 This is a layout diagram of photovoltaic panels and energy storage modules outside the tower of the hydrogen sulfide gas treatment system described in the present invention.

[0046] In the figure: 100, single pile body; 101, accommodating space; 102, equipment mounting base; 101a, equipment area; 101b, H2S gas enrichment area; 103, tower door; 200, reaction well; 201, reaction chamber; 202, slag discharge port; 300, exhaust assembly; 301, first blower; 302, exhaust pipeline; 400, oxygen supply assembly; 401, second blower; 402, oxygen supply pipeline; 500, re-injection air duct; 600, waste collection assembly; 601, circulation pipe; 602, sulfur collection box; 603, water pump; 700, sensor element; 701, first sensor; 702, second sensor. DETAILED DESCRIPTION

[0047] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0048] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0049] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0050] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0051] The invention relates to a single pile structure of an offshore wind turbine generator set and a hydrogen sulfide gas treatment system.

[0052] Figure 2 , Figure 3 , Figure 4 The first embodiment of a monopile structure of an offshore wind turbine generator system according to the present invention is shown. Figure 1 As shown, the monopile structure includes a monopile body 100 for providing stable support for the wind turbine, wherein the monopile body 100 is vertically arranged to the sea level, and the bottom end of the monopile body 100 extends into the seabed.

[0053] Further, such as Figure 2 As shown, a receiving space 101 is provided inside the monopile body 100 , and a vent intersecting with the receiving space 101 is provided on the side wall of the monopile body 100 to maintain gas flow inside and outside the monopile body 100 .

[0054] Further, such as Figure 2 As shown, a device mounting base 102 is provided inside the accommodation space 101, and the device mounting base 102 divides the accommodation space 101 into an equipment area 101a located above the device mounting base 102 and an H2S gas enrichment area 101b located below the device mounting base 102. Figure 2As shown, the equipment area 101a includes, from bottom to top, a hydrogen sulfide gas processing area layer, a fan box transformer area layer, a fan main control cabinet area layer, and a frequency converter area layer. Corresponding equipment is placed on each area layer, and spiral stairs are installed between each area layer to facilitate staff to enter and exit each area layer.

[0055] Furthermore, the side wall of the monopile body 100 is provided with a tower door 103 intersecting the accommodation space 101, which is used for workers to enter and exit the equipment area 101a. Figure 2 As shown, the tower door 103 should be set at the level where the fan box can enter and exit. It is known that the density of hydrogen sulfide gas is 1.537kg / m 3 , the density of air is 1.293kg / m 3 Obviously, the density of hydrogen sulfide is greater than that of air, so hydrogen sulfide gas often gathers in the lower layer of the space. The tower door 103 is set at the wind turbine box transformer area layer. First, it is convenient for the staff to enter and exit the equipment area 101a for daily inspection and maintenance of wind turbine equipment; second, it ensures the safety of the staff in and out of the equipment area 101a. The hydrogen sulfide gas treatment device located in the lower layer of the equipment area 101a can timely treat the hydrogen sulfide gas inside the tower, so that the hydrogen sulfide gas concentration inside the accommodation space 101 is less than 10mg / m 3 , to ensure the safety of staff.

[0056] Further, such as Figure 2 As shown, the overall structure of the single pile body 100 is columnar, truncated cone or prism-shaped, and preferably the end face is a columnar structure with a circular or regular polygonal shape.

[0057] Figure 2 , Figure 3 , Figure 4 FIG. 1 shows a first embodiment of a hydrogen sulfide gas treatment system of the present invention. Figure 3 As shown, the hydrogen sulfide gas treatment system includes a reaction well 200 and a gas extraction assembly 300. The reaction well 200 is arranged on the surface of the equipment mounting base 102 (i.e., the hydrogen sulfide gas treatment area layer), which is used to replace sulfur ions in the H2S gas. Figure 3 As shown, the exhaust assembly 300 includes a first blower 301, and an exhaust pipe 302 connecting the first blower 301 and the reaction well 200. The first blower 301 is used to extract the H2S gas in the H2S gas enrichment area 101b, and transport the H2S gas to the reaction well 200 through the exhaust pipe 302. A reaction chamber 201 containing a trivalent iron ion solution is provided in the reaction well 200. One end of the exhaust pipe 302 is connected to the reaction well 200 and communicated with the reaction chamber 201, and the other end of the exhaust pipe 302 extends to the bottom of the H2S gas enrichment area 101b.

[0058] When in use, the first blower 301 is started to extract the H2S gas in the H2S gas enrichment area 101b, and transport the H2S gas to the reaction well 200 through the exhaust pipe 302. The trivalent iron ion solution in the reaction chamber 201 catalyzes the H2S gas, and generates solid sulfur precipitation through chemical reaction and precipitates at the bottom of the reaction chamber 201. The main chemical reaction logic is as follows: the hydrogen sulfide gas pumped up forms an H2S solution in the solution, and then undergoes two-stage ionization to form H + and S -2 , S -2 and Fe in solution 3+ The reaction generates S 0 and Fe 2+ .

[0059] The chemical reaction principle is as follows (the reaction temperature is preferably 20-40°C, and the pH value is between 8 and 10):

[0060] Dissolution of hydrogen sulfide: H2S (gas) + H2O (liquid) = H2S (liquid) + H2O (liquid);

[0061] HS - First stage ionization: H2S (liquid) → H + +HS - ;

[0062] HS - Second stage ionization: HS - →H + +S -2 ;

[0063] S -2 Oxidation: S -2 +2Fe 3+ →S 0 (solid)+2Fe 2+ ;

[0064] The overall absorption reaction formula: H2S (gas) + 2Fe 3+ →S 0 (solid)+2Fe 2+ +2H + .

[0065] Further, such as Figure 3 As shown, H2S gas is corrosive, and therefore, the surface of the first blower 301 is coated with anti-corrosion Teflon material to extend the service life of the equipment.

[0066] Figure 2 , Figure 3 , Figure 4 FIG. 2 shows a second embodiment of a hydrogen sulfide gas treatment system of the present invention. Figure 3As shown, the hydrogen sulfide gas treatment system also includes an oxygen supply component 400, which includes a second blower 401, and an oxygen supply pipe 402 connecting the second blower 401 and the reaction well 200, one end of the oxygen supply pipe 402 is connected to the reaction well 200 and communicated with the reaction chamber 201, and the other end of the oxygen supply pipe 402 is connected to the oxygen chamber or directly communicated with the external air.

[0067] When in use, the second blower 401 is started to extract oxygen or air and deliver it to the reaction well 200 through the exhaust pipe 302. The oxygen in the extracted oxygen air can 2+ Oxidation and reduction to Fe 3+ The main chemical reaction logic is as follows: the extracted oxygen enters the reaction chamber 201 and dissolves in water to form oxygen liquid, and the oxygen further oxidizes Fe 2+ Reduction to Fe 3+ , in turn ensuring continuous treatment of H2S gas.

[0068] The chemical reaction principle is as follows (the reaction temperature is preferably 20-40°C, and the pH value is between 8 and 10):

[0069] Dissolution of oxygen: O2(gas)+2H2O(liquid)→O2(liquid)+2H2O;

[0070] Regeneration of divalent iron: O2(liquid)+2H2O+4Fe 2+ →2OH - +2Fe 3+ .

[0071] In conjunction with the first embodiment of a hydrogen sulfide gas treatment system, the overall chemical reaction equation is:

[0072] 2H2S+O2(gas)=2S 0 +2H2O.

[0073] Figure 2 , Figure 3 , Figure 4 FIG. 2 shows a third embodiment of a hydrogen sulfide gas treatment system of the present invention. Figure 3 As shown, the hydrogen sulfide gas treatment system further includes a re-injection air duct 500, one end of which is connected to the upper air outlet of the reaction well 200 and communicates with the reaction chamber 201, and the other end of the re-injection air duct 500 extends to the H2S gas enrichment area 101b. The positive pressure of the reaction well 200 is used to re-inject sulfur-free gas into the H2S gas enrichment area 101b.

[0074] In summary, the system has established a complete chemical reaction system to capture and treat hydrogen sulfide gas from offshore wind power. It has no limit on the concentration of hydrogen sulfide gas and can capture and dispose of it in real time. It makes full use of the diffusion principle of gas to avoid directly introducing external corrosive gas into the tower, and eliminates the risk of external corrosive gas escaping in the tower due to poor sealing of the platform inside the foundation. At the same time, it always maintains a slight positive pressure inside the tower to avoid the backflow of external marine gas from offshore wind turbines during the capture of hydrogen sulfide gas, which causes equipment corrosion.

[0075] Figure 2 , Figure 3 , Figure 4 FIG. 2 shows a third embodiment of a hydrogen sulfide gas treatment system of the present invention. Figure 3 As shown, the hydrogen sulfide gas treatment system also includes a waste collection component 600, which includes a circulation pipe 601, and a sulfur collecting box 602 and a water pump 603 arranged on the circulation pipe 601 in sequence along the liquid flow direction; the lower part of the reaction well 200 is an inverted cone structure and a slag discharge port 202 is arranged at the bottom. Such an arrangement allows the solid sulfur precipitate generated by the reaction to quickly gather near the slag discharge port 202. One end of the circulation pipe 601 is connected to the slag discharge port 202, and the other end of the circulation pipe 601 is connected to the middle of the reaction well 200 and communicates with the reaction chamber 201.

[0076] When in use, the water pump 603 is turned on, and the solid sulfur precipitate in the reaction well 200 flows in the circulation pipe 601 along with the iron-containing solution. After the solid sulfur precipitate enters the sulfur collecting box 602, it is intercepted by the filter membrane inside the sulfur collecting box 602. The solid sulfur can be collected in the sulfur collecting box 602, while the iron-containing solution flows back to the reaction well 200 along the pipeline, thereby realizing the separation of the iron-containing solution and elemental sulfur.

[0077] Furthermore, the surface of the sulfur collecting box 602 is provided with an observation window for observing the inside of the sulfur collecting box 602 from the outside, and at least one set of filter membranes arranged at the outlet of the sulfur collecting box 602 is provided in the sulfur collecting box 602. The observation window is made of a transparent material and is in a flat plate shape. The pore size of the filter membrane is 0.01 mm to 10 mm, preferably 1 mm. The sulfur collecting box 602 is replaceable, and the collected solid sulfur will be used as an additional economic product (sulfur).

[0078] Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 FIG. 4 shows a fourth embodiment of a hydrogen sulfide gas treatment system of the present invention. Figure 4 As shown, the hydrogen sulfide gas treatment system further includes a monitoring component, which includes a sensor element 700 for monitoring the concentration of hydrogen sulfide gas, and a relay electrically connecting the sensor element 700 and the system equipment and used to start the system equipment.

[0079] Furthermore, the sensor element 700 includes a first sensor 701 disposed in the equipment area 101 a and located at the tower door 103 , and a second sensor 702 disposed in the H 2 S gas enrichment area 101 b .

[0080] The system adopts a dual-circuit power supply mode, in which photovoltaic and energy storage are the main sources, and the fan inverter outlet power supply is the auxiliary source, forming a multi-energy complementary form. Figure 5 As shown, the photovoltaic panels and energy storage modules outside the tower are arranged as shown in Figure 6 shown.

[0081] 1) There are two power supplies for the hydrogen sulfide gas treatment system. The 220V inverter-generated photovoltaic power outside the wind turbine tower platform is the main power supply, and the 220V AC power supply at the wind turbine grid-connected switch is the backup power supply. This power supply method forms power supply complementarity and improves power supply stability. At the same time, photovoltaic power is used as the main power supply, fully realizing the "zero carbon" and "green +" operation of the entire system.

[0082] 2) Configure electrochemical energy storage modules and make good use of the energy storage lever on the power generation side. If the photovoltaic power generation cannot meet the operation of the hydrogen sulfide device due to meteorological factors, the energy storage module will serve as the main power supply for the equipment to operate.

[0083] 3) Installation method of batteries and photovoltaic panels. Installing photovoltaic panels and energy storage modules outside the tower platform does not involve changing the working characteristics of the converter, nor will it have a coupling effect on other wind power grid-connected units, and no hardware modification is required for existing equipment. The photovoltaic components and batteries are laid on the platform outside the tower, with the platform steel grid as the main supporting structure. During the installation process, a maintenance channel is reserved, and the inverter is installed inside the tower to reduce equipment corrosion.

[0084] The present invention also relates to a method for treating hydrogen sulfide gas based on the above-mentioned offshore wind turbine monopile structure and hydrogen sulfide gas treatment system. The method specifically comprises the following steps:

[0085] S1: Arrange H2S gas concentration monitoring points in the accommodation space 101 of the monopile body 100 and install sensors for monitoring H2S gas concentration;

[0086] S2: Set the sensor concentration warning value;

[0087] S3: When the monitoring value exceeds the warning value, the system equipment starts to extract the H2S gas in the accommodating space 101 into the reaction well 200 and undergoes a chemical reaction to replace the elemental sulfur precipitate;

[0088] S4: Re-injecting sulfur-free gas into the accommodating space 101;

[0089] S5: Collect the elemental sulfur precipitate to obtain sulfur as a byproduct.

[0090] Further, such as Figure 4 As shown, arranging H2S gas concentration monitoring points in the accommodation space 101 of the monopile body 100 and installing sensors for monitoring H2S gas concentration includes: arranging at least two concentration monitoring points and installing a first sensor 701 and a second sensor 702 at the two concentration monitoring points respectively. The two concentration monitoring points include a first monitoring point set in the equipment area 101a, where the space is where the staff enter and exit and contains wind turbine equipment, and a second monitoring point set in the H2S gas enrichment area 101b, where the hydrogen sulfide gas is mainly produced. Figure 1 As shown, the first monitoring point is located near the tower door 103 of the monopile body 100. A human body sensing device should be installed at the tower door 103, which is a prior art. The first sensor 701 is equipped with a voice broadcast module and is electrically connected to the human body sensing device, which is a prior art. Once the staff enters and exits the tower door 103, the hydrogen sulfide gas content and the operation status of the first sensor 701 will be automatically broadcast to eliminate safety hazards before the staff enters.

[0091] Further, setting the sensor concentration warning value includes setting the concentration warning value of the first sensor 701 to 6ppm, and setting the concentration warning value of the second sensor 702 to 10ppm. When the monitoring concentration of the first monitoring point is greater than 6ppm, it indicates that the hydrogen sulfide concentration in the upper space exceeds the standard, and the hydrogen sulfide gas treatment system meets the first start-stop condition requirement of the system, and the system automatically runs. That is, the first start-stop condition: when the monitoring concentration of the first monitoring point is greater than 6ppm, the system runs unconditionally. The hydrogen sulfide treatment system enters the full-speed operation mode.

[0092] Under normal circumstances (i.e. when the concentration at the first monitoring point is less than 6ppm), the start and stop of the hydrogen sulfide gas treatment system will be coupled with multiple factors such as daytime, nighttime, and temperature (refer to Figure 1 ).

[0093] The specific start-stop conditions include the following: 1) The second start-stop condition: when the concentration monitored at the second monitoring point is less than 10ppm, the hydrogen sulfide gas generation slope is greater than 4.25ppm / h, and the time is between 7:00 and 17:00; or when the concentration monitored at the second monitoring point is greater than (or equal to) 10ppm, and the time is between 7:00 and 17:00. At this time, the hydrogen sulfide treatment system enters the idle operation mode.

[0094] 2) The third start-stop condition: when the monitored concentration at the second monitoring point is less than 10ppm, the hydrogen sulfide gas production slope is greater than 4.25ppm / h, and the time is between 17:00 and 24:00 (or 0:00 to 7:00); or when the monitored concentration at the second monitoring point is greater than (or equal to) 10ppm, and the time is between 17:00 and 24:00 (or 0:00 to 7:00).

[0095] If the start and stop time interval of the hydrogen sulfide treatment system in the above time period is less than (or equal to) one hour, the system will not start until the concentration at the second measuring point is greater than (or equal to) 20 ppm, then the system will start.

[0096] In summary, the start and shutdown of the hydrogen sulfide gas treatment system is coupled with multiple factors (such as time, temperature, etc.), and by setting the initial slope of hydrogen sulfide gas production (the initial slope is set according to 4.25ppm / h during the actual measurement period), the marginal cost of system startup, the historical hydrogen sulfide trend of the gas content, the hydrogen sulfide gas content in the same period, and the optimal threshold and other parameters, the historical data is processed to predict the future hydrogen sulfide gas production situation and avoid frequent start and shutdown of the device.

[0097] Furthermore, extracting the H2S gas in the accommodating space 101 into the reaction well 200 and performing a chemical reaction to replace the elemental sulfur precipitate specifically includes the following steps:

[0098] S301: When the monitoring value exceeds the warning value, the first blower 301 is started to extract H2S gas into the reaction well 200 to react with the valent iron ion solution for absorption;

[0099] S302: When the monitoring value exceeds the warning value, the second blower 401 starts to extract O2 gas into the reaction well 200 and Fe 2+ The solution undergoes an oxidation regeneration reaction. It should be noted that when the monitoring value exceeds the warning value, the first blower 301 and the second blower 401 are started synchronously.

[0100] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to several modifications still falling within the scope of the appended claims.

[0101] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0102] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0103] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A monopile structure of an offshore wind turbine, characterized in that: include, A monopile body (100) is used to provide stable support for a wind turbine generator set; The monopile body (100) is provided with a housing space (101) inside, and a device mounting base (102) is provided inside the housing space (101), and the device mounting base (102) divides the housing space (101) into a device area (101a) located above the device mounting base (102), and an H2S gas enrichment area (101b) located below the device mounting base (102); The side wall of the monopile body (100) is provided with a tower door (103) intersecting the accommodating space (101), which is used for allowing operators to enter and exit the equipment area (101a).

2. The offshore wind turbine monopile structure according to claim 1, characterized in that: The monopile body (100) is arranged perpendicular to the sea level, and the bottom end of the monopile body (100) extends into the seabed.

3. The offshore wind turbine monopile structure according to claim 1, characterized in that: The overall structure of the single pile body (100) is columnar, truncated cone or prism-shaped.

4. The offshore wind turbine monopile structure according to claim 2, characterized in that: The overall structure of the single pile body (100) is columnar, truncated cone or prism-shaped.

5. A hydrogen sulfide gas treatment system applied to a monopile structure of an offshore wind turbine as claimed in any one of claims 1 to 4, characterized in that: include, A reaction well (200) for replacing sulfur ions in H2S gas, wherein the reaction well (200) is arranged on the surface of the equipment mounting base (102); as well as, A gas extraction assembly (300), comprising a first blower (301) and a gas extraction pipeline (302) connecting the first blower (301) and the reaction well (200), wherein the first blower (301) is used to extract H2S gas in the H2S gas enrichment area (101b) and transport the H2S gas to the reaction well (200) through the gas extraction pipeline (302); A reaction chamber (201) containing a trivalent iron ion solution is provided in the reaction well (200), one end of the exhaust pipe (302) is connected to the reaction well (200) and communicates with the reaction chamber (201), and the other end of the exhaust pipe (302) extends to the bottom of the H2S gas enrichment area (101b).

6. The hydrogen sulfide gas treatment system according to claim 5, characterized in that: The surface of the first blower (301) is coated with corrosion-resistant Teflon material.

7. The hydrogen sulfide gas treatment system according to claim 5, characterized in that: The system also includes an oxygen supply component (400), which includes a second blower (401) and an oxygen supply pipeline (402) connecting the second blower (401) and the reaction well (200), one end of the oxygen supply pipeline (402) is connected to the reaction well (200) and communicated with the reaction chamber (201), and the other end of the oxygen supply pipeline (402) is connected to the oxygen chamber or directly communicated with the external air.

8. The hydrogen sulfide gas treatment system according to claim 7, characterized in that: The system further comprises a re-injection air duct (500), one end of which is connected to the upper air outlet of the reaction well (200) and communicates with the reaction chamber (201), and the other end of which extends to the H2S gas enrichment area (101b).

9. The hydrogen sulfide gas treatment system according to claim 7 or 8, characterized in that: The system also includes a waste collection assembly (600), which includes a circulation pipe (601), and a sulfur collection box (602) and a water pump (603) sequentially arranged on the circulation pipe (601) along the liquid flow direction; The lower part of the reaction well (200) is an inverted cone structure and a slag discharge port (202) is provided at the bottom. One end of the circulation pipe (601) is connected to the slag discharge port (202), and the other end of the circulation pipe (601) is connected to the middle part of the reaction well (200) and communicated with the reaction chamber (201).

10. The hydrogen sulfide gas treatment system according to claim 9, characterized in that: The surface of the sulfur collecting box (602) is provided with an observation window for observing the inside of the sulfur collecting box (602) from the outside, and at least one group of filter membranes arranged at the outlet of the sulfur collecting box (602) is provided in the sulfur collecting box (602).

11. The hydrogen sulfide gas treatment system according to claim 10, characterized in that: The observation window is made of a transparent material and is in a flat plate shape.

12. The hydrogen sulfide gas treatment system according to claim 10, characterized in that: The pore size of the filter membrane is 0.01 mm to 10 mm.

13. The hydrogen sulfide gas treatment system according to claim 9, characterized in that: The system further comprises a monitoring component, which comprises a sensor element (700) for monitoring the concentration of hydrogen sulfide gas, and a relay electrically connecting the sensor element (700) and the system equipment and for starting the system equipment.

14. The hydrogen sulfide gas treatment system according to claim 13, characterized in that: The sensing element (700) comprises a first sensor (701) arranged in the equipment area (101a) and located at the tower door (103), and a second sensor (702) arranged in the H2S gas enrichment area (101b).

15. A method for treating hydrogen sulfide gas applied to the hydrogen sulfide gas treatment system according to any one of claims 6, 7, 8, 10, 11, 12, 13, and 14, characterized in that: The steps include: S1: arranging H2S gas concentration monitoring points in the accommodation space (101) of the monopile body (100) and installing sensors for monitoring H2S gas concentration; S2: Set the sensor concentration warning value; S3: When the monitoring value exceeds the warning value, the system equipment starts to extract the H2S gas in the accommodating space (101) into the reaction well (200) and undergoes a chemical reaction to replace the elemental sulfur precipitate; S4: re-injecting sulfur-free gas into the accommodating space (101); S5: Collect the elemental sulfur precipitate to obtain sulfur as a byproduct.

16. The method for treating hydrogen sulfide gas according to claim 15, characterized in that: The method of arranging H2S gas concentration monitoring points in the accommodation space (101) of the monopile body (100) and installing sensors for monitoring H2S gas concentration comprises: arranging at least two concentration monitoring points and installing a first sensor (701) and a second sensor (702) at the two concentration monitoring points, respectively.

17. The method for treating hydrogen sulfide gas according to claim 16, wherein: The two concentration monitoring points include a first monitoring point arranged in the equipment area (101a) and a second monitoring point arranged in the H2S gas enrichment area (101b); The first monitoring point is located near a tower door (103) of the monopile body (100).

18. The method for treating hydrogen sulfide gas according to claim 15, wherein: The setting of the sensor concentration warning value includes setting the concentration warning value of the first sensor (701) to 6 ppm, and setting the concentration warning value of the second sensor (702) to 10 ppm.

19. The method for treating hydrogen sulfide gas according to any one of claims 16 to 18, characterized in that: Extracting H2S gas in the accommodating space (101) into the reaction well (200) and performing a chemical reaction to replace the elemental sulfur precipitate specifically includes the following steps: S301: When the monitoring value exceeds the warning value, the first blower (301) is started to extract H2S gas into the reaction well (200) to react with the valent iron ion solution for absorption; S302: When the monitoring value exceeds the warning value, the second blower (401) starts to extract O2 gas into the reaction well (200) and Fe 2+ The solution undergoes an oxidation regeneration reaction.

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