Controllable Micro-Pulse Incineration Catalytic Treatment and Waste Heat Recovery Device for Exhaust Gas of Transport Ships

Abstract

The embodiment of the present application provides a controllable micro-pulse incineration catalytic treatment and waste heat recovery device for the exhaust gas of a transport ship, which relates to the technical field of ship exhaust gas treatment. The controllable micro-pulse incineration catalytic treatment and waste heat recovery device for the exhaust gas of a transport ship includes a pulse incinerator boiler, an ignition power supply device, and a heat exchange tube; the pulse incinerator boiler serves as the core load-bearing structure for integrating the ignition power supply device and the chimney; the ignition power supply device is integrally installed in the pulse incinerator boiler. This solution realizes efficient incineration, deep oxidation purification of the catalyst layer, and cascade recovery of waste heat in the heat exchange tube by dynamically adjusting the gas mixing ratio, solves the problems of incomplete combustion, serious heat waste, complex structure, and difficulty in adapting to gas composition fluctuations in the traditional flare system, and at the same time achieves the goals of energy conservation, emission reduction, and efficient energy utilization.

Description

Technical Field

[0001] This application relates to the technical field of ship exhaust gas treatment, and more specifically, to a controllable micro-pulse incineration catalytic treatment and waste heat recovery device for the exhaust gas of a transport ship. Background Art

[0002] During the transportation process of an LNG (liquefied natural gas) carrier, due to reasons such as liquid evaporation, pressure changes, and ventilation of the cabin and equipment, a large amount of BOG (boil-off gas), relief gas, and ventilation exhaust gas will be generated. These gases usually contain combustible components such as methane (CH4) and volatile organic compounds (VOCs). If directly discharged into the atmosphere, it will not only cause energy waste, but also have a serious impact on the environment due to the strong greenhouse effect of methane (its greenhouse effect is about 28 times that of carbon dioxide).

[0003] Currently, the traditional treatment method is to incinerate the above-mentioned exhaust gas through a flare system. However, there are many problems with this treatment method:

[0004] First, incomplete combustion. The flare system is difficult to adapt to fluctuations in gas composition (such as changes in methane concentration), resulting in incomplete combustion, generating a large amount of unburned methane and carbon monoxide, further exacerbating greenhouse gas emissions;

[0005] Second, heat waste. The high-temperature flue gas generated by flare combustion is directly discharged into the atmosphere without being effectively recovered and utilized, resulting in energy waste;

[0006] Third, complex structure and high cost. The flare system is complex in design, large in volume, difficult to install, and is particularly affected by weather conditions in the marine environment, and it is difficult to ensure ignition stability;

[0007] Fourth, environmental and safety risks. Flare combustion may generate noise, light pollution, and acidic gas emissions, posing potential threats to the surrounding environment and the safety of ship operation.

[0008] In addition, with the continuous improvement of global requirements for energy conservation and emission reduction, how to efficiently treat multi-source exhaust gas on LNG carriers and achieve energy recovery has become an urgent technical problem to be solved. Although there are existing solutions that use catalytic combustion or waste heat recovery in the prior art, these methods often only target a single exhaust gas source and cannot adapt to the complex gas composition and dynamic operating conditions of LNG carriers.

[0009] Therefore, it is particularly important to develop a device that can adapt to exhaust gas treatment in the full concentration range and simultaneously has the functions of efficient combustion, deep purification, and waste heat recovery. Summary of the Invention

[0010] This application aims to solve at least one of the technical problems existing in the prior art. To this end, this application provides a controllable micro-pulse incineration catalytic treatment waste heat recovery device for the exhaust gas of a transport ship. By dynamically adjusting the gas mixing ratio, it realizes efficient incineration, deep oxidation purification of the catalyst layer, and stepped waste heat recovery of the heat exchange tubes, solving the problems of incomplete combustion, serious heat waste, complex structure, and difficulty in adapting to gas composition fluctuations in the traditional flare system, and at the same time achieving the goals of energy conservation, emission reduction, and efficient energy utilization.

[0011] The controllable micro-pulse incineration catalytic treatment waste heat recovery device for the exhaust gas of a transport ship according to an embodiment of the present application includes: a pulse incineration boiler, an ignition power supply device, and a heat exchange tube;

[0012] The pulse incineration boiler serves as the core load-bearing structure for integrating the ignition power supply device and the chimney;

[0013] The ignition power supply device is integrally installed inside the pulse incineration boiler;

[0014] The heat exchange tube is used in cooperation with the ignition power supply device and is installed inside the pulse incineration boiler;

[0015] The ignition power supply device includes pulse pipe fittings;

[0016] Among them, an ignition electrode is provided inside the pulse pipe fittings, and spring check valves are arranged at both ends of the pulse pipe fittings;

[0017] The input end of the pulse pipe fittings is connected to the outlet of the gas mixer;

[0018] A silencing tile is connected to the outlet end of the pulse pipe fittings;

[0019] The end of the silencing tile is provided with a catalyst layer.

[0020] According to some embodiments of the present application, an installation flange is sleeved on the end of the pulse pipe fittings, and the pulse pipe fittings are fixedly installed on the outer wall of the pulse incineration boiler through the installation flange.

[0021] According to some embodiments of the present application, the pulse pipe fittings are cylindrical pressure-resistant cavities.

[0022] According to some embodiments of the present application, a gas inlet pipe is connected to the inlet of the gas mixer; among them, the gas inlet pipe is divided into a BOG inlet pipe and an air inlet pipe.

[0023] According to some embodiments of the present application, the silencing tile adopts a multi-layer gradient pore ceramic fiber module for buffering high-pressure airflows.

[0024] According to some embodiments of the present application, the catalyst layer is a modular honeycomb ceramic carrier for promoting the complete oxidation of CO and CH4.

[0025] According to some embodiments of the present application, the double-layer interlayer of the inner wall of the pulse incineration boiler is filled with heat-insulating materials to reduce the heat loss of high-temperature flue gas and improve the thermal efficiency.

[0026] According to some embodiments of the present application, check valves are installed on both the BOG inlet pipe and the air inlet pipe of the gas inlet pipe to prevent gas backflow.

[0027] According to some embodiments of the present application, a flame arrester and a solenoid valve are also installed on the BOG inlet pipe and the air inlet pipe of the gas inlet pipe. The flame arrester is used to prevent the flame from flowing back to the upstream gas source or air pipeline, ensuring the explosion-proof safety of the system;

[0028] Meanwhile, the solenoid valve dynamically adjusts the opening and closing frequency and timing to control the mixing ratio of combustible gas and air, ensuring that the concentration of the mixed gas is within the explosion limit range, and cooperates with the ignition electrode to achieve periodic pulse combustion.

[0029] According to some embodiments of the present application, the chimney is used to discharge the low-temperature flue gas after catalytic oxidation purification and waste heat recovery, and a temperature sensor is configured at its outlet.

[0030] The beneficial effects of the present application are as follows: By adopting a solenoid valve to dynamically adjust the gas mixing ratio and an ignition power supply device, this solution triggers controllable micro-explosion combustion, which can adapt to the treatment of exhaust gas in the full concentration range, significantly improve the combustion efficiency and reduce greenhouse gas emissions; combined with the deep oxidation purification of residual CH4 and CO by the catalyst layer, it ensures that the pollutant emissions meet the standards; at the same time, the heat exchange tube is used to achieve the cascade recovery of the waste heat of high-temperature flue gas, greatly reducing energy waste, and improving the adaptability and safety of the device through a compact modular design, ultimately achieving the unity of high efficiency, environmental protection and economy in the exhaust gas treatment of LNG carriers.

[0031] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0033] Figure 1 is the overall structural process flow chart of the controllable micro-pulse incineration catalytic treatment and waste heat recovery device for the exhaust gas of a carrier;

[0034] Figure 2 It is a structural process flow chart of an ignition power supply device according to an embodiment of the present application.

[0035] Icon: 1. Gas inlet pipe; 2. Gas mixer; 3. Pulse pipe fitting; 31. Installation flange; 4. Sound insulation tile; 41. Catalyst layer; 5. Ignition electrode; 6. Spring check valve; 7. Pulse incineration boiler; 8. Thermal insulation material; 9. Check valve; 10. Flame arrester; 11. Solenoid valve; 12. Chimney; 13. Heat exchange tube; 14. Ignition power supply device. Specific embodiments

[0036] Next, the technical solutions in the embodiments of the present application will be described with reference to the accompanying drawings in the embodiments of the present application.

[0037] To make the purpose, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0038] Therefore, the detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application claimed, but merely represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0039] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0040] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality of" means two or more unless otherwise specifically defined.

[0042] In this application, unless otherwise clearly stipulated and defined, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal connection of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] In this application, unless otherwise clearly stipulated and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath", and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0044] The following describes a controllable micro-pulse incineration catalytic treatment waste heat recovery device for the exhaust gas of a transport ship according to an embodiment of the present application with reference to the accompanying drawings.

[0045] As Figure 1 - Figure 2 shown, a controllable micro-pulse incineration catalytic treatment waste heat recovery device for the exhaust gas of a transport ship according to an embodiment of the present application includes a pulse incineration boiler 7, an ignition power supply device 14, and a heat exchange tube 13;

[0046] The pulse incineration boiler 7, as the core bearing structure, is used to integrate the ignition power supply device 14 and the chimney 12, and realizes the controllable combustion of high-temperature flue gas, the deep purification of pollutants, and the cascade recovery of waste heat in combination with the heat insulation material 8 in the double-layer shell sandwich;

[0047] The ignition power supply device 14 is integrally installed in the pulse incineration boiler 7 and is used to achieve the efficient incineration of exhaust gas in the full concentration range through intermittent micro-explosion combustion controlled by a solenoid valve, and at the same time provide a thermal driving force for subsequent catalytic oxidation and waste heat recovery;

[0048] Among them, the ignition power supply device 14 includes a gas inlet pipe 1, a gas mixer 2, a pulse pipe fitting 3, a mounting flange 31, a silencing tile 4, a catalyst layer 41, an ignition electrode 5, and a spring check valve 6;

[0049] Specifically, the ignition power supply device 14 forms a controllable micro-explosion combustion by periodically opening and closing the solenoid valve 11, realizes the dynamic concentration adaptation incineration of BOG, vent gas, and ventilation waste gas of the LNG carrier, and cooperates with the catalyst layer 41 and the chimney 12 to complete the deep purification of pollutants and waste heat recovery;

[0050] The ignition power supply device 14 includes a pulse pipe fitting 3, and a mounting flange 31 is sleeved on the end of the pulse pipe fitting 3. The pulse pipe fitting 3 is fixedly installed on the outer wall of the pulse incineration boiler 7 through the mounting flange 31;

[0051] The pulse pipe fitting 3 is a cylindrical pressure-resistant cavity. Among them, an ignition electrode 5 is arranged inside the pulse pipe fitting 3. The ignition electrode 5 is a high-energy igniter, located on the central axis of the pulse pipe fitting 3, with an electrode gap of 2 - 5 mm, insulated from the inner wall of the pulse pipe fitting 3, and connected to a high-voltage power supply of 15 - 25 kV. Spring check valves 6 are arranged at both ends of the pulse pipe fitting 3. Among them, the valve disc spring stiffness of the pulse pipe fitting 3 is designed to open only under a pressure difference of 0.1 - 0.3 MPa;

[0052] The input end of the pulse pipe fitting 3 is connected to the outlet of the gas mixer 2, and the inlet of the gas mixer 2 is communicated with a gas inlet pipe 1;

[0053] Among them, the gas inlet pipe 1 is divided into a BOG inlet pipe and an air inlet pipe, and both are equipped with a solenoid valve 11 and a flame arrester 10;

[0054] Meanwhile, a concentration sensor is built in the gas mixer 2 to dynamically adjust the ratio of BOG to air to the explosion limit range of 5% - 15% CH4;

[0055] The outlet end of the pulse pipe fitting 3 is connected to a silencing tile 4. Among them, a catalyst layer 41 is installed at the end of the silencing tile 4, and the silencing tile 4 and the catalyst layer 41 are connected in series;

[0056] The silencing tile 4 adopts a multi-layer gradient pore ceramic fiber module, which is used to buffer the high-pressure air flow, with a thickness of 50 - 100 mm, and the porosity decreases layer by layer from 80% to 30%. It is closely attached to the outlet end of the pulse pipe fitting 3 and is fixed in the pulse incineration boiler 7 by bolts.

[0057] The catalyst layer 41 is a modular honeycomb ceramic carrier with a pore density of 200 - 400 cpsi, which promotes the complete oxidation of CO and CH4. The surface of the catalyst layer 41 is coated with a Pt - Pd / Rh three-way catalyst, installed downstream of the silencing tile 4, and is convenient for replacement through a slide rail drawer structure;

[0058] Specifically, the sound-absorbing tile 4 adopts a gradient pore structure, which can intercept large particles at the front end of the catalyst layer 41 with a pore density of 400 cpsi and reduce the pressure drop at the rear end with 200 cpsi.

[0059] Workflow of the gas mixing stage:

[0060] Gas mixing stage

[0061] BOG and air are mixed at a CH4 concentration of 5% - 15%. The concentration sensor feeds back the signal to the solenoid valve 11 in real time to adjust the opening degree;

[0062] The turbulent blades homogenize the mixed gas to avoid local concentration exceeding the standard.

[0063] Pulse combustion stage:

[0064] The solenoid valve 11 is periodically opened at a frequency of 1 - 10 Hz, and the mixed gas enters the pulse pipe fitting 3;

[0065] The ignition electrode 5 discharges to ignite the mixed gas, triggering a controllable micro-explosion with a pressure peak value of 0.2 - 0.8 MPa;

[0066] The spring check valve 6 is quickly closed under the action of the pressure difference to form a closed combustion chamber.

[0067] Energy release and purification:

[0068] The high-temperature and high-pressure flue gas at 1200 - 1500 °C flushes open the outlet spring check valve 6 and enters the sound-absorbing tile 4 to reduce the pressure to atmospheric pressure;

[0069] The flue gas flows through the catalyst layer 41, and the oxidation rates of the residual CH4 and CO are increased to over 99.5% with a reaction temperature ≥ 800 °C.

[0070] This solution realizes self-adaptive mixing in the full concentration range of 0% - 100% CH4 through the linkage of the concentration sensor and the solenoid valve 11; improves the combustion efficiency by matching the pressure fluctuation frequency of the pulse detonation wave with the active temperature window of the catalyst; the spring check valve 6 and the flame arrester 10 form a double anti-backfire barrier, and the thermal insulation material 8 in the sandwich of the pulse incinerator boiler 7 adopts a ceramic fiber + aluminum silicate composite structure with a thermal conductivity ≤ 0.05 W / m·K.

[0071] The heat exchange tube 13 is used in cooperation with the ignition power supply device 14 and installed in the pulse incinerator boiler 7. By absorbing the heat of the high-temperature flue gas generated by the pulse combustion, the waste heat is transferred to the ship's heating medium such as hot oil or water, realizing the cascaded recovery and utilization of energy and reducing the flue gas emission temperature;

[0072] Among them, the heat exchange tube 13 can absorb the heat of the high-temperature flue gas, complete the waste heat recovery; and can reduce the flue gas temperature to ensure emission safety; finally, improve the overall energy efficiency of the system and reduce energy waste;

[0073] In this solution, the ignition power supply device 14 connects the gas mixer 2 and the pulse pipe fitting 3 through the gas inlet pipe 1. Its pipeline includes a BOG / air dual-channel mixed intake passage controlled by the solenoid valve 11 and a deflagration chamber isolated by the spring check valve 6. The pulse incineration boiler 7 integrates the ignition power supply device 14 and is connected to the heating medium hot oil / water pipeline through the built-in heat exchange pipe 13. The high-temperature flue gas generated by pulse deflagration completes catalytic oxidation and waste heat recovery in the pulse incineration boiler 7, realizing the cascade treatment and energy conversion of waste gas.

[0074] The double-layer sandwich inside the wall of the pulse incineration boiler 7 is filled with heat-insulating material 8, which is used to reduce the heat loss of the high-temperature flue gas, improve the thermal efficiency, and ensure the uniformity of the system temperature distribution through the thermal coupling design with the chimney 12 and the catalyst layer 41;

[0075] Among them, the heat-insulating material 8 can reduce heat loss, improve the waste heat recovery efficiency; maintain the high-temperature environment inside the pulse incineration boiler 7, optimize the catalytic oxidation reaction conditions; realize the cascade utilization of heat and thermal stability through structural integration.

[0076] Check valves 9 are installed on both the BOG inlet pipe and the air inlet pipe of the gas inlet pipe 1 to prevent gas backflow.

[0077] A flame arrester 10 and a solenoid valve 11 are also installed on the BOG inlet pipe and the air inlet pipe of the gas inlet pipe 1. The flame arrester 10 is used to prevent the flame from flowing back to the upstream gas source or air pipeline, ensuring the explosion-proof safety of the system, and realizing multiple protections through the collaborative design with the solenoid valve 11 and the check valve 9;

[0078] Among them, the flame arrester 10 can prevent the reverse propagation of the flame, protect the safety of the upstream gas source and equipment; jointly form a backfire prevention barrier with the check valve 9 and the solenoid valve 11, improving the system reliability; provide key safety guarantees during the dynamic mixing and pulse combustion process;

[0079] At the same time, the solenoid valve 11 dynamically adjusts the opening and closing frequency and timing to control the mixing ratio of combustible gas and air, ensuring that the concentration of the mixed gas is within the explosion limit range, and jointly realizing periodic pulse combustion with the ignition electrode 5;

[0080] Specifically, the solenoid valve 11 can dynamically adjust the BOG and air flow rates, ensuring that the concentration of the mixed gas is suitable for combustion; control the periodicity and stability of pulse combustion; jointly complete a safe and efficient combustion process with components such as the ignition electrode 5 and the spring check valve 6.

[0081] The heat exchange pipe 13 is made of 316L stainless steel spiral coil with a wall thickness of 2 - 3 mm. It is wound concentrically with an outer diameter of φ20 - 50 mm and is welded inside the pulse incineration boiler 7. The flue gas flows outside the pipe wall, and the heating medium hot oil / water flows inside the pipe;

[0082] Among them, a spiral steel strip with a pitch of 50 - 100 mm is welded to the inner wall of the heat exchange tube 13 to enhance turbulent heat transfer;

[0083] Specifically, the interlayer of the heat exchange tube 13 is filled with a NaCl - MgCl₂ phase change material with a melting point of 300 - 400 °C to store the instantaneous high heat of pulse combustion;

[0084] Meanwhile, a polytetrafluoroethylene (PTFE) coating is sprayed on the inner wall of the heat exchange tube 13 to reduce the risk of fouling on the medium side.

[0085] The outlet end of the heat exchange tube 13 is interconnected with the inlet end of the heating medium hot oil / water pipeline. The chimney 12 is used to discharge the low - temperature flue gas after catalytic oxidation purification and waste heat recovery. A temperature sensor is configured at its outlet to monitor the discharge temperature in real time through the built - in temperature sensor to optimize the system operation parameters.

[0086] The chimney 12 can discharge the purified low - temperature flue gas to ensure environmental protection compliance; cooperate with the temperature sensor to adjust the system thermal efficiency and avoid acid dew point corrosion caused by too low temperature; as the final discharge channel of the waste gas treatment system, it completes the overall process flow.

[0087] In this solution, the solenoid valve 11 is used to dynamically adjust the mixing ratio of BOG and air. Periodic micro - explosion combustion is initiated in the pulse pipe 3 of the ignition power supply device 14. After the high - temperature flue gas is noise - reduced by the sound - absorbing tile 4 and deeply oxidized and purified by the catalyst layer 41, the waste heat is recovered through the heat exchange tube 13 and the low - temperature purified gas is discharged through the chimney 12, realizing the efficient incineration of LNG carrier waste gas, pollutant reduction and cascade utilization of energy.

[0088] The processing steps of this solution are as follows:

[0089] S1. Gas pretreatment:

[0090] BOG and air are mixed as needed through the solenoid valve 11, and the concentration sensor ensures that the mixed gas is within the explosion limit range;

[0091] S2. Pulse combustion:

[0092] The mixed gas enters the pulse pipe 3, and the ignition electrode 5 ignites to initiate controllable micro - explosion combustion. The spring check valve 6 maintains the pressure in the combustion chamber;

[0093] S3. Sound absorption and catalytic purification:

[0094] The high - temperature and high - pressure flue gas is depressurized and noise - reduced by the sound - absorbing tile 4, and then the residual CH₄ and CO are completely oxidized through the catalyst layer 41;

[0095] S4. Waste heat recovery and discharge:

[0096] The flue gas flows through the heat exchange tube 13 to transfer heat to the ship's heating medium, and finally discharges the low-temperature purified gas through the chimney 12;

[0097] S5. Safety and energy conservation:

[0098] The flame arrester 10, check valve 9 and heat insulation material 8 cooperate to ensure the safety of the system, improve the thermal efficiency, and reduce energy consumption and emissions.

[0099] Specifically, the working principle of the controllable micro-pulse incineration catalytic treatment waste heat recovery device for the exhaust gas of a transport ship: In this solution, the solenoid valve 11 is used to dynamically adjust the mixing ratio of BOG and air. Periodic micro-explosion combustion is initiated in the pulse pipe 3 of the ignition power supply device 14. After the high-temperature flue gas is noise-reduced by the sound-absorbing tile 4 and deeply oxidized and purified by the catalyst layer 41, the waste heat is recovered through the heat exchange tube 13 and the low-temperature purified gas is discharged through the chimney 12, realizing the efficient incineration of the exhaust gas of the LNG transport ship, the reduction of pollutants, and the cascaded utilization of energy.

[0100] The above are only the embodiments of the present application and are not used to limit the protection scope of the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0101] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, and all should be covered by the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A waste heat recovery device for controllable micro-pulse incineration catalytic treatment of exhaust gas from transport ships, characterized in that: include: A pulse incineration boiler (7), an ignition power supply device (14) and a heat exchange tube (13); The pulse incineration boiler (7) serves as a core bearing structure for integrating an ignition power supply device (14) and a chimney (12); The ignition power supply device (14) is integrated and installed in the pulse incineration boiler (7); The heat exchange tube (13) is used in conjunction with an ignition power supply device (14) and is installed in a pulse incineration boiler (7); The ignition power supply device (14) comprises a pulse tube (3); The pulse tube (3) is provided with an ignition electrode (5) therein, and spring check valves (6) are arranged at both ends of the pulse tube (3); The input end of the pulse tube (3) is connected to the outlet of the gas mixer (2); The outlet end of the pulse pipe (3) is connected to a silencer tile (4); A catalyst layer (41) is installed at the rear end of the muffler tile (4); The inlet of the gas mixer (2) is connected to the gas inlet pipe (1); The gas inlet pipe (1) is divided into a BOG inlet pipe and an air inlet pipe; The BOG inlet pipe and the air inlet pipe of the gas inlet pipe (1) are also equipped with a flame arrester (10) and a solenoid valve (11). The flame arrester (10) is used to prevent the flame from flowing back to the upstream gas source or air pipeline, thereby ensuring the explosion-proof safety of the system. At the same time, the solenoid valve (11) controls the mixing ratio of the combustible gas and the air by dynamically adjusting the opening and closing frequency and timing, thereby ensuring that the concentration of the mixed gas is within the explosion limit range, and cooperates with the ignition electrode (5) to achieve periodic pulse combustion.

2. The controllable micro-pulse incineration catalytic treatment waste heat recovery device for exhaust gas from transport ships according to claim 1 is characterized in that: The end of the pulse pipe (3) is sleeved with a mounting flange (31), and the pulse pipe (3) is fixedly mounted on the outer wall of the pulse incineration boiler (7) via the mounting flange (31).

3. The controllable micro-pulse incineration catalytic treatment waste heat recovery device for exhaust gas from transport ships according to claim 2 is characterized in that: The pulse pipe (3) is a cylindrical pressure-resistant cavity.

4. The controllable micro-pulse incineration catalytic treatment waste heat recovery device for exhaust gas from transport ships according to claim 3 is characterized in that: The muffler tile (4) adopts a multi-layer gradient porosity ceramic fiber module and is used to buffer the high-pressure airflow.

5. The controllable micro-pulse incineration catalytic treatment waste heat recovery device for exhaust gas from transport ships according to claim 4 is characterized in that: The catalyst layer (41) is a modular honeycomb ceramic carrier, which is used to promote the complete oxidation of CO and CH4.

6. The controllable micro-pulse incineration catalytic treatment waste heat recovery device for exhaust gas from transport ships according to claim 5 is characterized in that: The double-layer interlayer of the inner wall of the pulse incineration boiler (7) is filled with a heat-insulating material (8) to reduce heat loss from high-temperature flue gas and improve thermal efficiency.

7. The controllable micro-pulse incineration catalytic treatment waste heat recovery device for exhaust gas from transport ships according to claim 6 is characterized in that: Both the BOG inlet pipe and the air inlet pipe of the gas inlet pipe (1) are equipped with check valves (9) to prevent gas backflow.

8. The controllable micro-pulse incineration catalytic treatment waste heat recovery device for exhaust gas from transport ships according to claim 7 is characterized in that: The chimney (12) is used to discharge low-temperature flue gas after catalytic oxidation purification and waste heat recovery, and a temperature sensor is configured at its outlet.

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