Denitrification device, denitrification system, drilling platform and denitrification treatment method

Abstract

A denitrification device, a denitrification system, a drilling platform and a denitrification treatment method. The denitrification device is used for a drilling platform for offshore operation, wherein at least one generator is mounted in an engine room of the drilling platform. The denitrification device comprises at least one reactor, at least one mixing pipe and at least one reducing agent container, wherein the mixing pipe is in communication with each of an exhaust gas discharging port of the generator, the reducing agent container and the reactor; the reducing agent container stores a reducing agent; the reactor stores a catalyst; and exhaust gas discharged from the generator undergoes a catalytic reduction reaction with the reducing agent and the catalyst in the reactor, so as to perform denitrification treatment on the exhaust gas. The denitrification device, the denitrification system, the drilling platform and the denitrification treatment method can convert nitrogen oxides (NOX) in the exhaust gas into environmentally friendly nitrogen and water, thereby eliminating or reducing the content of the NOX in the exhaust gas and improving the environmental protection effect.

Description

Denitrification devices, denitrification systems, drilling platforms, and denitrification treatment methods Technical Field

[0001] This invention relates to the technical field of marine engineering and equipment, and particularly to a denitrification device, denitrification system, drilling platform, and denitrification treatment method. Background Technology

[0002] Currently, increasingly stringent environmental protection requirements are placing higher demands on marine engineering products in terms of new technologies and materials. Existing jack-up drilling platforms can no longer meet the market's environmental requirements, and green marine engineering products will become the mainstream of future marine engineering design.

[0003] In offshore areas, the NOx (nitrogen oxides) emission requirements for diesel engines used on drilling platforms have reached Tier III (Level 3 requirements). Therefore, drilling platforms urgently need an effective NOx emission control scheme to remove or reduce the NOx content produced after fuel combustion. At the same time, drilling platforms will use a large amount of clean fuels such as recycled fuel oil, which can greatly improve the green indicators of drilling platforms and meet the requirements of the times.

[0004] Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of existing technologies in which offshore drilling platforms cannot effectively eliminate or reduce nitrogen oxide emissions, and to provide a denitrification device, a denitrification system, a drilling platform, and a denitrification treatment method.

[0006] The present invention solves the above-mentioned technical problems through the following technical solution:

[0007] A denitrification device is provided for use on an offshore drilling platform. At least one generator is installed in the engine room of the drilling platform. The denitrification device includes at least one reactor, at least one mixing pipe, and at least one reducing agent container. The mixing pipe is connected to the exhaust port of the generator, the reducing agent container, and the reactor. The reducing agent container stores a reducing agent. The reactor stores a catalyst. The exhaust gas from the generator reacts with the reducing agent and the catalyst in the reactor to perform a catalytic reduction reaction, thereby denitrifying the exhaust gas.

[0008] In this scheme, the denitrification device is connected to the generator's exhaust port and the reducing agent container via a mixing pipe. This allows the exhaust gas and reducing agent to be concentrated in the mixing pipe for thorough mixing. The mixed gas is then placed in a reactor where, under the action of a catalyst, a catalytic reduction reaction occurs, converting nitrogen oxides (NOx) in the exhaust gas into environmentally harmless nitrogen and water. This eliminates or reduces the NOx content in the exhaust gas, improving environmental protection. This process for removing nitrogen oxides is called denitrification treatment.

[0009] Preferably, a detector is provided inside the mixing pipe, the detector being used to detect the content of nitrogen oxides in the exhaust gas discharged from the generator.

[0010] In this scheme, the denitrification device can determine the content of nitrogen oxides in the exhaust gas through the aforementioned detector, and select whether to input a reducing agent or control the amount of reducing agent according to the level of nitrogen oxides, so as to match the amount of nitrogen oxides in the exhaust gas. This helps to ensure the effect of the catalytic reduction reaction, thereby improving the denitrification treatment effect.

[0011] Preferably, the denitrification device further includes a selection pipe and a bypass pipe, the selection pipe being connected to the reactor, the mixing pipe being switched between being connected to one of the selection pipe and the bypass pipe and being closed to the other of the selection pipe and the bypass pipe, the bypass pipe being connected to the external environment.

[0012] In this scheme, the denitrification device, through the above-mentioned settings, allows the mixing pipe to be connected to the selection pipe when the content of nitrogen oxides in the exhaust gas is high, so as to transport the mixed gas to the reactor for denitrification treatment; while when the content of nitrogen oxides in the exhaust gas is low or the area does not require denitrification treatment, the mixing pipe can be connected to the bypass pipe to directly discharge the exhaust gas into the external environment without denitrification treatment.

[0013] Preferably, the denitrification device further includes a control system, the detector is electrically connected to the control system, the control system receives the content value of the nitrogen oxides detected by the detector, and controls the reducing agent container to output the reducing agent.

[0014] In this scheme, the denitrification device, through the cooperation of the aforementioned control system and detector, can automatically and in real time adjust the output of the reducing agent according to the detection results (nitrogen oxide content value), ensuring that it matches the nitrogen oxide content value, which helps to improve the accuracy of the mixing ratio, thereby improving the denitrification effect.

[0015] Preferably, the denitrification device further includes a control system, and a detector is provided in the mixing pipe or the selection pipe. The detector is used to detect the content of nitrogen oxides in the exhaust gas discharged by the generator and feed it back to the control system. The control system controls the mixing pipe to switch between being connected to one of the selection pipe and the bypass pipe, and to be closed to the other of the selection pipe and the bypass pipe, according to the detected content of nitrogen oxides and preset conditions.

[0016] In this solution, the denitrification device, through the cooperation of the aforementioned control system, detector, and mixing tube, can automatically and in real time switch the connected objects of the mixing tube according to the detection results (nitrogen oxide content value) and preset conditions, making the control of whether denitrification treatment is required more accurate and the control method more flexible.

[0017] Preferably, the preset condition is that when the content of the nitrogen oxides is not lower than the first ratio, the mixing tube is connected to the selection tube, and the mixing tube is closed and not connected to the bypass tube.

[0018] In this scheme, denitrification treatment can be carried out when the nitrogen oxide content is equal to or higher than the target first ratio under the aforementioned preset conditions. Different first ratios can be set according to the requirements of different emission areas.

[0019] Preferably, the reactor outlet is connected to a silencer, which is connected to the external environment via an exhaust pipe.

[0020] In this solution, the de-pinning device eliminates the exhaust gas generated by the generator and the vibration impact of the mixed gas on the pipeline through the silencer, reducing noise and creating a comfortable environment.

[0021] A denitrification system includes a plurality of generators and a plurality of denitrification devices as described above. Each denitrification device includes a reactor, a mixing pipe, and a reducing agent container connected in sequence. The mixing pipe of each denitrification device is connected to the exhaust port of a generator.

[0022] In this denitrification system, each component of the denitrification unit (reactor, mixing pipe, and reducing agent container) forms a one-to-one connected pipeline with each generator. These multiple connected pipelines create an array for denitrification treatment, improving efficiency. Furthermore, the different denitrification units do not interfere with each other, enhancing the effectiveness of waste gas denitrification and reducing noise.

[0023] A drilling platform includes a nacelle housing a generator, a deck atop the nacelle, and a denitrification device as described above, wherein the denitrification device is installed on the deck; or the denitrification device is installed in part of the nacelle and on the deck.

[0024] In this scheme, the drilling platform, through the aforementioned denitrification device, can concentrate the waste gas and reducing agent into a mixing pipe for thorough mixing. Then, in the reactor, the mixed gas undergoes a catalytic reduction reaction under the action of a catalyst, which can convert nitrogen oxides (NOx) in the waste gas into nitrogen and water that are harmless to the environment, thereby eliminating or reducing the content of nitrogen oxides in the waste gas and improving the environmental protection effect.

[0025] Preferably, the drilling platform includes a plurality of generators and a plurality of denitrification devices, each of the denitrification devices including a reactor, a mixing pipe and a reducing agent container connected in sequence, and the mixing pipe of each of the denitrification devices being connected to the exhaust port of a generator.

[0026] In this scheme, the drilling platform forms a one-to-one interconnected pipeline system between each denitrification unit's components (reactor, mixing pipe, and reducing agent container) and each generator. Multiple denitrification units and their corresponding generators form an array for denitrification treatment, improving efficiency. Furthermore, the different denitrification units do not interfere with each other, which is beneficial for the effectiveness of waste gas denitrification treatment and reduces noise.

[0027] A denitrification treatment method for a drilling platform, wherein the denitrification treatment method utilizes the denitrification device described above to denitrify the exhaust gas from the generator of the drilling platform, and the denitrification treatment method includes the following steps:

[0028] Step S1: The exhaust gas discharged from the generator and the reducing agent in the reducing agent container are transported to the mixing pipe and mixed to form a mixed gas;

[0029] Step S2: The mixed gas is fed into the reactor and undergoes a catalytic reduction reaction with the catalyst in the reactor;

[0030] Step S3: Discharge the gas and water after the catalytic reduction reaction into the external environment.

[0031] In this solution, the denitrification treatment method of the drilling platform can convert nitrogen oxides (NOx) in the exhaust gas into nitrogen and water that are harmless to the environment through the above steps, thereby eliminating or reducing the content of nitrogen oxides in the exhaust gas and improving the environmental protection effect.

[0032] Preferably, a detector is provided inside the mixing tube; the following steps are included before step S1:

[0033] Step S11: Use the detector to detect the content of nitrogen oxides in the exhaust gas discharged by the generator, and control the reducing agent container to output the reducing agent according to the detected content of nitrogen oxides in the exhaust gas.

[0034] In this scheme, the denitrification treatment method for the drilling platform, through the above steps, matches the detected nitrogen oxide content with the reduction dose, which helps to ensure the effectiveness of the catalytic reduction reaction and thus improves the denitrification treatment effect.

[0035] Preferably, the denitrification device further includes a selector pipe and a bypass pipe, the selector pipe being connected to the reactor and the bypass pipe being connected to the external environment; the following steps are included before step S2:

[0036] Step S21: Detect the nitrogen oxide content in the exhaust gas discharged by the generator, and based on the detected nitrogen oxide content and preset conditions, control the mixed gas to be transported from the mixing pipe to the reactor through the selection pipe, and close the connection between the mixing pipe and the bypass pipe, or close the connection between the mixing pipe and the selection pipe, and control the exhaust gas and / or the mixed gas to be directly discharged to the external environment through the bypass pipe.

[0037] In this scheme, the denitrification treatment method of the drilling platform involves the following steps: when the content of nitrogen oxides in the exhaust gas is high, the mixed gas is transported to the reactor for denitrification treatment; when the content of nitrogen oxides in the exhaust gas is low or the area does not require denitrification treatment, the exhaust gas is directly discharged into the external environment without denitrification treatment.

[0038] The positive and progressive effects of this invention are that the denitrification device, denitrification system, drilling platform, and denitrification treatment method can convert nitrogen oxides (NOx) in waste gas into nitrogen and water that are harmless to the environment, thereby eliminating or reducing the content of nitrogen oxides in waste gas and improving environmental protection. Attached Figure Description

[0039] Figure 1 is a schematic diagram of the de-pinning device according to Embodiment 1 of the present invention.

[0040] Figure 2 is a top view of the drilling platform of Embodiment 3 of the present invention.

[0041] Figure 3 is a flowchart of the denitrification treatment method of Embodiment 4 of the present invention.

[0042] Figure Label Explanation: 1. Drilling Platform; 11. Engine Room; 12. Deck; 2. Generator; 21. Exhaust Gas Exhaust Pipe; 3. Denitrification Device; 4. Urea Injection Interface; 5. Mixing Pipe; 6. Selector Pipe; 7. Bypass Pipe; 8. Reactor; 9. Silencer; 10. Exhaust Pipe; 10. Bend Section; 10. Detailed Implementation

[0043] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0044] Example 1

[0045] This embodiment provides a denitrification device 3 for use on an offshore drilling platform 1. At least one generator 2 is installed in the engine room 11 of the drilling platform 1. The denitrification device includes at least one reactor 8, at least one mixing pipe 5, and at least one reducing agent container (not shown). The mixing pipe 5 is connected to the exhaust port of the generator 2, the reducing agent container, and the reactor 8. The reducing agent container stores a reducing agent, which may be ammonia, urea, or other nitrogen-containing compounds. The reactor 8 stores a catalyst. The exhaust gas from the generator 2, the reducing agent, and the catalyst undergo a catalytic reduction reaction in the reactor 8 to denitrify the exhaust gas.

[0046] Specifically, as shown in Figure 1, the denitrification device in this embodiment is a series of components connected to a generator 2. On the main connecting pipeline, from the exhaust port of the generator 2, sequentially connected are an exhaust pipe 21, a mixing tank 5, a selector pipe 6, a reactor 8, a silencer 9, and an exhaust pipe 10; branches of the mixing pipe 5 also connect to a reducing agent container (not shown in the figure) via an injection port 4, and to a bypass pipe 7. In terms of arrangement, the generator 2 is located inside the engine room 11, below the deck 12, and the exhaust pipe 21 extends from inside the engine room 11 to above the deck 12 and connects to the mixing pipe 5. Urea is used as the reducing agent, and the reducing agent container stores urea. Urea is injected into the mixing pipe 5 through the urea injection port 4. The urea mixes thoroughly with the nitrogen oxides (NOx) in the exhaust gas in the mixing pipe 5. The mixed gas is then sent to the reactor 8. Under the action of the catalyst in the reactor 8, NOx and urea undergo a catalytic reduction reaction to produce non-toxic and pollution-free nitrogen and water, thereby purifying the NOx in the exhaust gas from the generator 2, that is, eliminating or reducing the NOx content in the exhaust gas, and improving the environmental protection effect. This process of removing nitrogen oxides is called denitrification treatment.

[0047] In other embodiments, the number of reactors 8, mixing pipes 5, exhaust pipes 10, and reducing agent containers can be adjusted as needed, and their connection methods can also be adjusted as required. For example, one reducing agent container can supply reducing agent to multiple mixing pipes 5, or multiple reducing agent containers can supply reducing agent to multiple mixing pipes 5 respectively. In this embodiment, in terms of pipeline connection, one reactor 8 is connected to one mixing pipe 5, one mixing pipe 5 is connected to one reducing agent container through a urea inlet, and one mixing pipe 5 is connected to the exhaust port of one generator 2 through an exhaust pipe 10, forming a one-to-one corresponding connecting pipeline.

[0048] The mixing pipe 5 is equipped with a detector (not shown in the figure) to detect the content of nitrogen oxides (NOx) in the exhaust gas emitted by the generator 2. This detector allows for the determination of NOx content in the exhaust gas, enabling the selection of whether to inject urea or to control the amount of urea based on the NOx content, ensuring it matches the NOx content in the exhaust gas. This helps guarantee the effectiveness of the catalytic reduction reaction and thus improves the denitrification treatment.

[0049] In application, the choice of whether to inject urea and the amount to be controlled can be made according to the emission requirements of different regions.

[0050] As shown in Figure 1, the selector pipe 6 is connected to the reactor 8. The mixing pipe 5 is alternately connected to one of the selector pipe 6 and the bypass pipe 7, and closed to the other of the two pipes. The bypass pipe 7 is connected to the external environment. Specifically, when the NOx content in the exhaust gas is high, the mixing pipe 5 can be connected to the selector pipe 6 to transport the mixed gas to the reactor 8 for denitrification treatment. In this case, the mixing pipe 5 is closed and not connected to the bypass pipe 7. When the NOx content in the exhaust gas is low or the area does not require denitrification treatment, the mixing pipe 5 can be connected to the bypass pipe 7 to directly discharge the exhaust gas into the external environment without denitrification treatment. In this case, the mixing pipe 5 is closed and not connected to the selector pipe 6. This switching operation can be performed manually or automatically.

[0051] In this embodiment, the denitrification device 3 employs an automatic control method for denitrification. Therefore, the denitrification device also includes a control system. The detector is electrically connected to the control system. The control system receives the nitrogen oxide content value detected by the detector and controls the reducing agent container to output the reducing agent. Through the cooperation of the control system and the detector, the output amount of the reducing agent can be automatically and in real time adjusted according to the detection result (nitrogen oxide content value) to ensure that it matches the nitrogen oxide content value. This helps to improve the accuracy of the mixing ratio, thereby improving the denitrification effect.

[0052] In automatic control mode, when the above-mentioned mixing pipe 5 needs to automatically switch the connection of different pipes, the control system judges the content of nitrogen oxides (NOx) in the exhaust gas. It can compare the detected NOx content with preset conditions, thereby controlling the mixing pipe 5 to switch between connecting with one of the selection pipe 6 and the bypass pipe 7, and closing with the other of the selection pipe 6 and the bypass pipe 7.

[0053] In this embodiment, the preset condition is that when the content of nitrogen oxides is not lower than the first ratio, the mixing pipe 5 is connected to the selection pipe 6, and the mixing pipe 5 is closed and not connected to the bypass pipe 7. The amount of NOx in the exhaust gas of the generator 2 varies depending on its rotational speed. Based on this, the emission limit varies according to different emission standards, and this emission limit is the first ratio in the preset condition. For example, in Tier III emission standards, when the generator 2 rotates below 130 rpm, the emission limit is 3.4 g / kWh. When the generator 2 rotates between 130 and 2000 rpm, the emission limit is determined by the formula 9 x n(-0.2) g / kWh, where n is the rotational speed. When the rotational speed is higher than 2000 rpm, the emission limit is 2.0 g / kWh. In Tier II emission standards, when the generator 2 rotates below 130 rpm, the emission limit is 14.4 g / kWh. When generator 2 operates at speeds between 130 and 2000 rpm, the emission limit is determined by the formula 44 x n(-0.23) g / kWh, where n is the rotational speed. When generator 2 operates at speeds above 2000 rpm, the emission limit is 7.7 g / kWh1. By pre-setting these comparison conditions, the control system can automatically perform denitrification treatment once the NOx content equals or exceeds the target first ratio. Furthermore, different first ratios can be set according to the requirements of different emission zones.

[0054] In other embodiments, the preset conditions can be set in various ways depending on the different operating conditions and emission area requirements. For example, the preset conditions can be determined by the average NOx content detected by the detector within a certain period of time, or by the maximum value of the NOx content detected by multiple samplings within multiple periods. Alternatively, the preset conditions can be determined by detecting different locations and areas at different positions from the emission port to the mixing pipe 5, and the average NOx content detected at different locations can be used as the preset comparison conditions.

[0055] Therefore, through the cooperation of the control system, detector, and mixing tube 5, the denitrification device 3 can automatically and in real time switch the connected objects of the mixing tube 5 according to the detection results (nitrogen oxide content value) and preset conditions, making the control of whether denitrification is required more accurate and the control method more flexible.

[0056] As shown in Figure 1, the outlet of reactor 8 is connected to a silencer 9, which is connected to the external environment through an exhaust pipe 10. This denitrification device 3 eliminates the exhaust gas generated by generator 2 and the vibration impact of the mixed gas on the pipeline through the silencer 9, reducing noise and creating a comfortable environment.

[0057] The exhaust pipe 10 has a curved section 101 at its end. The curved section 101 can be configured to open in the direction required by the exhaust area to prevent the exhaust gas from being blown into the working area of ​​the drilling platform 1 and affecting the operators.

[0058] Example 2

[0059] This embodiment provides a denitrification system, which is the array structure formed by five generators 2 and five denitrification devices connected to them, as shown in Figure 1. Therefore, this denitrification system includes five generators 2 and five denitrification devices as described in Embodiment 1. Each denitrification device includes a reactor 8, a mixing pipe 5, and a reducing agent container connected in sequence. The mixing pipe 5 of each denitrification device is connected to the exhaust port of one of the generators 2. In this denitrification system, each component of each denitrification device 3 (reactor 8, mixing pipe 5, and reducing agent container) forms a one-to-one corresponding set of connecting pipes with each generator 2. The five generators 2 correspond to five connecting pipes, and the two connecting pipes do not affect each other, independently completing the denitrification treatment, which is beneficial to the effectiveness of the exhaust gas denitrification treatment. When the five connecting pipes simultaneously treat the exhaust gas of the five generators 2, the denitrification treatment efficiency can be improved.

[0060] In other embodiments, the connection combination between the various de-pinning devices of the de-pinning system and the multiple generators can be adjusted as needed, and is not necessarily a one-to-one correspondence as in this embodiment. The one-to-one correspondence of the connecting pipelines described above is a preferred choice in this embodiment.

[0061] Example 3

[0062] This embodiment provides a drilling platform 1, which includes a nacelle 11 housing generators 2, a deck 12 on top of the nacelle 11, and a denitrification device as described in Embodiment 1. The nacelle 11 houses five generators 2, which are connected to the five denitrification devices in the manner described in Embodiment 2, forming five interconnected pipelines. All five denitrification devices are installed above the deck 12.

[0063] In other embodiments, depending on the arrangement requirements within the engine room 11, a portion of the depinning device 3 may be installed within a portion of the engine room 11, while the remaining portion of the depinning device 3 may be installed on the deck 12.

[0064] The drilling platform 1, through the aforementioned denitrification device 3, can concentrate the waste gas and reducing agent into the mixing pipe 5 for thorough mixing. Then, in the reactor 8, the mixed gas undergoes a catalytic reduction reaction under the action of a catalyst, which can convert nitrogen oxides (NOx) in the waste gas into nitrogen and water that are harmless to the environment, thereby eliminating or reducing the content of nitrogen oxides in the waste gas and improving the environmental protection effect.

[0065] The drilling platform 1 forms a one-to-one connection pipeline between each component (reactor 8, mixing pipe 5, and reducing agent container) of each denitrification device 3 and each generator 2. Multiple denitrification devices 3 and their corresponding generators 2 form an array for denitrification treatment, improving the efficiency of denitrification. Furthermore, the different denitrification devices 3 do not interfere with each other, which is beneficial to the effectiveness of waste gas denitrification treatment and reduces noise.

[0066] The drilling platform used in this embodiment is shown in Figure 2. When using this drilling platform 1, for environmental protection purposes, the generator 2 generally uses renewable fuel as clean fuel. Given the strong compatibility of renewable fuel, most fuel equipment can be used directly. However, when designing the system and selecting equipment, the following considerations should be taken into account when choosing which renewable fuel to use: (1) There is currently no unified international standard for renewable diesel, and the performance of each oil company's products varies. Relatively clear oil parameters are required during the design phase; (2) The use of oil must be approved by the diesel engine manufacturer and comply with its relevant requirements; (3) Special attention should be paid to the use of NBR (Nitrile Butadiene Rubber) materials, as there are differing opinions; (4) According to the current NFPA20 (NFPA20 is the National Fire Protection Association of the United States) requirements, biodiesel is not recommended for the fire pump of the diesel generator 2. If the fire pump is from the diesel generator 2, it needs to be equipped with a conventional fuel tank and an independent fuel supply system.

[0067] Furthermore, in terms of intelligent applications, the drilling platform 1 in this embodiment provides an intelligent drilling system that can be applied to the jack-up drilling platform 1. It is equipped with an intelligent integrated control system that integrates multiple intelligent applications such as AI-based drilling testing, friction testing, and automatic sliding orientation, providing precise control and high consistency for drilling activities, achieving "autonomous driving" functionality. This intelligent drilling system standardizes the drilling process, automates repetitive drilling activities, and uses AI technology to identify formation changes and automatically optimize drilling parameters, allowing the driller to focus more on the drilling process and safety, reducing drilling risks, and improving drilling efficiency and quality. Simultaneously, it provides a streamlined wizard interface for the centralized operation of multiple devices, simplifying operations, reducing the error rate, and achieving dual closed-loop control on and downhole, locally and remotely. With automated drilling rig operation, on-site personnel are only responsible for supervision and emergency operations, thereby reducing the need for platform personnel.

[0068] In terms of green applications, this drilling platform 1 meets the requirements of the diesel generator NOx emission control zone, improves the platform's green index, and meets increasingly stringent environmental protection requirements. In terms of intelligent applications, it effectively reduces the required drilling platform area, increases platform utilization, reduces the number of personnel on the platform, and simultaneously reduces on-site workload during future platform operations, minimizing personnel risks and significantly improving operational quality, efficiency, and safety. This enhances the market competitiveness of the jack-up drilling platform 1.

[0069] Example 4

[0070] As shown in Figure 3, this embodiment provides a denitrification treatment method for a drilling platform 1. This denitrification treatment method utilizes the denitrification device as described in Embodiment 1 to denitrify the exhaust gas from the generator 2 of the drilling platform 1. The denitrification treatment method includes the following steps:

[0071] Step S1: The exhaust gas discharged from generator 2 and the reducing agent in the reducing agent container are transported to mixing pipe 5 to mix and form a mixed gas;

[0072] Step S2: The mixed gas is fed into reactor 8 and undergoes a catalytic reduction reaction with the catalyst in reactor 8;

[0073] Step S3: Discharge the gas and water after the catalytic reduction reaction into the external environment.

[0074] The denitrification treatment method of the drilling platform 1 can convert nitrogen oxides (NOx) in the exhaust gas into nitrogen and water that are harmless to the environment through the above steps, thereby eliminating or reducing the content of nitrogen oxides in the exhaust gas and improving the environmental protection effect.

[0075] When a detector is installed inside the mixing tube 5, the following steps are included before step S1:

[0076] Step S11: Use a detector to detect the content of nitrogen oxides in the exhaust gas discharged by generator 2, and control the output of reducing agent from the reducing agent container according to the detected content of nitrogen oxides in the exhaust gas.

[0077] The denitrification treatment method of drilling platform 1, through the above steps, matches the detected nitrogen oxide content with the reduction dose, which helps to ensure the effect of catalytic reduction reaction and thus improves the effect of denitrification treatment.

[0078] When the denitrification device is also equipped with a selector pipe 6 and a bypass pipe 7, the selector pipe 6 is connected to the reactor 8, and the bypass pipe 7 is connected to the external environment; therefore, the following steps are included before step S2:

[0079] Step S21: Detect the content of nitrogen oxides in the exhaust gas discharged from generator 2, and according to the detected nitrogen oxide content and preset conditions, control the mixed gas to be transported from mixing pipe 5 to reactor 8 through selection pipe 6, and close the connection between mixing pipe 5 and bypass pipe 7, or close the connection between mixing pipe 5 and selection pipe 6, and control the exhaust gas and / or mixed gas to be directly discharged to the external environment through bypass pipe 7.

[0080] The denitrification treatment method of the drilling platform 1 involves the following steps: when the content of nitrogen oxides in the exhaust gas is high, the mixed gas is transported to the reactor 8 for denitrification treatment; when the content of nitrogen oxides in the exhaust gas is low or the area does not require denitrification treatment, the exhaust gas is directly discharged into the external environment without denitrification treatment.

[0081] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and various changes or modifications can be made to these embodiments without departing from the principles and essence of the present invention. Therefore, the scope of protection of the present invention is defined by the appended claims.

Claims

1. A de-nitrating device for a drilling platform for offshore operations, said drilling platform having at least one generator installed in the engine room of the drilling platform, characterized in that, The denitrification device includes at least one reactor, at least one mixing pipe, and at least one reducing agent container. The mixing pipe is connected to the exhaust port of the generator, the reducing agent container, and the reactor, respectively. The reducing agent container stores a reducing agent. The reactor stores a catalyst. The exhaust gas discharged from the generator and the reducing agent and the catalyst undergo a catalytic reduction reaction in the reactor to denitrify the exhaust gas.

2. The device according to claim 1, wherein The mixing pipe is equipped with a detector, which is used to detect the content of nitrogen oxides in the exhaust gas discharged by the generator.

3. The de-NOx apparatus according to claim 1 or 2, characterized by The denitrification device further includes a selection pipe and a bypass pipe. The selection pipe is connected to the reactor. The mixing pipe is switched between being connected to one of the selection pipe and the bypass pipe and closed to the other of the selection pipe and the bypass pipe. The bypass pipe is connected to the external environment.

4. The de-NOx apparatus according to claim 2, wherein The denitrification device also includes a control system. The detector is electrically connected to the control system. The control system receives the content value of the nitrogen oxides detected by the detector and controls the reducing agent container to output the reducing agent.

5. The device according to claim 3, wherein The denitrification device also includes a control system. A detector is installed in the mixing pipe or the selection pipe. The detector is used to detect the content of nitrogen oxides in the exhaust gas discharged by the generator and feeds it back to the control system. The control system controls the mixing pipe to switch between being connected to one of the selection pipe and the bypass pipe, and to be closed to the other of the selection pipe and the bypass pipe, according to the detected content of nitrogen oxides and preset conditions.

6. The device according to claim 5, wherein The preset condition is that when the content of nitrogen oxides is not lower than the first ratio, the mixing tube is connected to the selection tube, and the mixing tube is closed and not connected to the bypass tube.

7. The de-NOx apparatus according to any one of claims 1 to 6, wherein The reactor outlet is connected to a silencer, which is connected to the external environment via an exhaust pipe.

8. A denitration system characterized by, The denitrification system includes a plurality of generators and a plurality of denitrification devices as described in any one of claims 1-7. Each denitrification device includes a reactor, a mixing pipe and a reducing agent container connected in sequence. The mixing pipe of each denitrification device is connected to the exhaust port of a generator.

9. A drilling platform characterized by, The drilling platform includes a nacelle housing a generator, a deck on top of the nacelle, and a denitrification device as described in any one of claims 1-7, wherein the denitrification device is installed on the deck; or the denitrification device is installed in part of the nacelle and on the deck.

10. The drilling platform of claim 9, wherein, The drilling platform includes several generators and several denitrification devices. Each denitrification device includes a reactor, a mixing pipe, and a reducing agent container connected in sequence. The mixing pipe of each denitrification device is connected to the exhaust port of a generator.

11. A method of denitration treatment of a drilling platform, characterized by, The denitrification treatment method utilizes the denitrification device as described in any one of claims 1-7 to denitrify the exhaust gas from the generator of the drilling platform, and the denitrification treatment method includes the following steps: Step S1: The exhaust gas discharged from the generator and the reducing agent in the reducing agent container are transported to the mixing pipe and mixed to form a mixed gas; Step S2: The mixed gas is fed into the reactor and undergoes a catalytic reduction reaction with the catalyst in the reactor; Step S3: Discharge the gas and water after the catalytic reduction reaction into the external environment.

12. The method of claim 11, wherein the scrubbing process is performed on a drilling platform. The mixing tube is equipped with a detector; the following steps are included before step S1: Step S11: Use the detector to detect the content of nitrogen oxides in the exhaust gas discharged by the generator, and control the reducing agent container to output the reducing agent according to the detected content of nitrogen oxides in the exhaust gas.

13. The method of denitration treatment of a drilling platform according to claim 11 or 12, characterized in that, The denitrification device further includes a selector pipe and a bypass pipe, the selector pipe being connected to the reactor and the bypass pipe being connected to the external environment; prior to step S2, the following steps are also included: Step S21: Detect the nitrogen oxide content in the exhaust gas discharged by the generator, and based on the detected nitrogen oxide content and preset conditions, control the mixed gas to be transported from the mixing pipe to the reactor through the selection pipe, and close the connection between the mixing pipe and the bypass pipe, or close the connection between the mixing pipe and the selection pipe, and control the exhaust gas and / or the mixed gas to be directly discharged to the external environment through the bypass pipe.

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