Dual-purpose organic heat carrier furnace for marine fuel oil exhaust gas
By installing refractory partitions and heat exchange chambers in marine organic heat carrier furnaces, flexible switching and coordinated heating of fuel oil and waste heat from exhaust gas can be achieved, solving the problem of dynamic heat source switching during ship navigation, improving heat exchange efficiency and reducing operating costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HENAN SITONG BOILER
- Filing Date
- 2025-08-22
- Publication Date
- 2026-07-21
AI Technical Summary
Existing marine organic heat carrier furnaces cannot dynamically switch between diesel engine exhaust heat and fuel combustion during ship navigation, and cannot provide coordinated heating in space-constrained scenarios on ships.
Design a marine fuel oil and exhaust gas dual-purpose organic heat carrier furnace. By setting a refractory partition inside the shell to divide it into upper and lower shells, fuel oil heating and exhaust gas heating systems are constructed respectively. Combined with radiation and convection heat exchange chambers, flexible switching and synergistic heating of fuel oil and exhaust gas waste heat can be achieved.
Ensure stable heating demand under various ship operating conditions, reduce equipment space occupation, improve heat exchange efficiency by 20%-30%, reduce operating costs, reduce exhaust emissions, and optimize the internal layout of the ship.
Smart Images
Figure CN224534499U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of boiler technology, and more specifically, to a marine fuel oil exhaust gas dual-purpose organic heat carrier furnace. Background Technology
[0002] Organic heat carrier furnaces, due to their characteristics of low pressure and high temperature, fast thermal response, and high thermal efficiency, are widely used in marine heating, primarily for cabin heating and other areas requiring heat sources. Currently, marine organic heat carrier furnaces are mainly divided into two categories: fuel oil type and exhaust gas type.
[0003] Oil-fired organic heat carrier furnaces heat the organic heat carrier in the heat exchange pipe by burning oil, and then transport it to the heat use area by a high-temperature circulating pump. However, they rely on oil supply and have problems such as high operating costs and pollution emissions.
[0004] Exhaust gas type organic heat carrier furnaces utilize the waste heat from the high-temperature exhaust gas of marine diesel engines to heat organic heat carriers, which can reduce energy consumption and emissions. However, they are limited by the operating status of the diesel engine. When the ship is docked, the diesel engine power is insufficient, or the engine is shut down, the amount of exhaust gas decreases, resulting in a decrease in heating capacity, which cannot meet the heating demand.
[0005] In the prior art, for example, Chinese invention patent application number 201810783693.4 discloses an organic heat carrier boiler, which adopts a solid heat storage device and off-peak electricity heating mode. It stores the heat energy converted from electrical energy through a magnesium-iron heat storage stack and a plate heater, and uses a high-temperature oil pump and a hot water circulation system to achieve heat output. Although this solution can achieve "zero combustion and no pollution" and reduce costs by using off-peak electricity, it relies on shore power or a specific power supply. It cannot directly adapt to the dynamic switching needs of diesel engine exhaust heat and fuel combustion during ship navigation, and it does not solve the problem of multi-heat source coordinated heating in the case of limited space on ships. Utility Model Content
[0006] The purpose of this utility model is to provide a marine fuel oil exhaust gas dual-purpose organic heat carrier furnace to solve the problems mentioned in the background art, which rely on shore power or specific power supply, cannot directly adapt to the dynamic switching needs of diesel engine exhaust gas waste heat and fuel oil combustion during ship navigation, and does not solve the problem of multi-heat source coordinated heating in ship space-constrained scenarios.
[0007] To achieve the above objectives, this utility model provides a marine fuel oil exhaust gas dual-purpose organic heat carrier furnace, including a shell, with a refractory partition inside the shell. The refractory partition includes an upper refractory partition and a lower refractory partition, with the lower refractory partition dividing the shell into an upper shell and a lower shell. A burner is provided at the top of the upper shell, and radiant heat pipes and convective heat exchange pipes located around the radiant heat pipes are provided inside the upper shell. A plurality of serpentine heat exchange pipes are provided inside the lower shell, and an exhaust gas inlet is provided on the bottom plate of the lower shell. Chimneys are connected to one side of both the upper and lower shells.
[0008] This design divides the hull into upper and lower shells by incorporating a fire-resistant partition within the shell, housing separate fuel oil heating and exhaust gas heating systems. The burner at the top of the upper shell handles fuel oil combustion, with radiant heat pipes and convective heat exchange tubes transferring heat from the combustion. The serpentine heat exchange tubes in the lower shell are connected to the exhaust gas inlet, utilizing the high-temperature exhaust gas from the marine diesel engine for heat exchange. Both the upper and lower shells are externally connected to chimneys to discharge the combustion gases and the exhaust gases after heat exchange.
[0009] Preferably, a heat insulation layer is provided on the outer side of the shell.
[0010] This feature involves installing an insulation layer on the outside of the shell, utilizing the low thermal conductivity of the insulation material to reduce heat loss from the furnace interior to the external environment.
[0011] Preferably, the outlets of the radiant heat pipe and the convection heat exchanger are connected to the oil outlet manifold, the inlets of all the serpentine heat exchanger tubes are connected to the oil inlet pipe seat through the first intermediate header, and the outlets of all the serpentine heat exchanger tubes are connected to the inlets of the radiant heat pipe and the convection heat exchanger tube of the upper shell through the second intermediate header.
[0012] This setup clarifies the connection relationship between each heat exchange tube, manifold, and tube seat. The organic heat carrier enters the serpentine heat exchange tube from the oil inlet tube seat through the first intermediate header to absorb the heat from the exhaust gas, and then enters the radiant heat pipe and convective heat exchange tube of the upper shell through the second intermediate header to further absorb the heat from fuel combustion. Finally, it is output from the oil outlet manifold to the heat use area, forming a complete heat carrier circulation path.
[0013] Preferably, the upper side of the lower casing is connected to an external chimney via an exhaust gas outlet.
[0014] This feature connects the exhaust gas outlet on the upper side of the lower shell to the external chimney, providing a discharge channel for the exhaust gas after heat exchange, allowing the exhaust gas to be smoothly discharged from the furnace.
[0015] Preferably, the upper side of the upper casing is connected to an external chimney via a fuel gas outlet.
[0016] This feature connects the fuel gas outlet on the upper side of the casing to the external chimney, allowing the fuel gas produced by combustion to be discharged from the furnace.
[0017] Preferably, a manhole and a fire observation hole are installed on the top of the upper housing.
[0018] The manhole on the top of the casing allows maintenance personnel to enter the furnace to inspect, maintain, and repair components such as the burner, radiant heat pipes, and convective heat exchange tubes; the observation hole allows operators to observe the combustion status of the burner from the outside, such as the shape and color of the flame.
[0019] Preferably, the space enclosed by the radiant heat pipes forms a radiant heat exchange chamber, the cavity between the convective heat exchange pipes and the radiant heat pipes forms a convective heat exchange chamber, the burner nozzle is directly opposite the center of the radiant heat exchange chamber, and the bottom of the radiant heat exchange chamber has a gap that allows flue gas to enter the convective heat exchange chamber.
[0020] This configuration involves radiant heat pipes forming a radiant heat exchange chamber, with the burner nozzle directly facing the center of the chamber. This allows the flame heat to be directly transferred to the heat carrier in the radiant heat pipes via radiation. The gap at the bottom of the radiant heat exchange chamber allows the high-temperature flue gas generated by combustion to enter the convection heat exchange chamber, where it undergoes convective heat exchange with the convection heat exchange pipes, further transferring heat.
[0021] Preferably, the lower end of the chimney is connected to one side of the exhaust gas inlet, and a bypass valve is installed at the connection.
[0022] The bypass valve at the lower end of the chimney, which connects to the exhaust gas inlet, can be opened when there is too much heat from the high-temperature exhaust gas discharged from the diesel engine. This allows some of the exhaust gas to bypass the serpentine heating pipe and be discharged directly into the chimney through the bypass valve.
[0023] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0024] In this marine fuel oil and exhaust gas dual-purpose organic heat carrier furnace, users can freely choose to utilize the high-temperature exhaust gas from the diesel engine, start the burner independently, or simultaneously activate both heat sources for heating, depending on the ship's operating status and heat demand. This ensures a stable supply of heat to the designated areas under various operating conditions, including navigation and berthing. By integrating the fuel oil heating system and the exhaust gas heating system into a single shell, separated by a refractory partition, compared to the traditional solution requiring two independent heating systems, this significantly reduces the cabin space occupied by the equipment, optimizes the ship's internal layout, and improves space utilization.
[0025] The serpentine heat exchange tubes in the lower shell are arranged in a crisscross pattern, significantly increasing the contact area between the high-temperature flue gas and the heat carrier, enhancing heat exchange efficiency and increasing the heat transfer capacity by 20%-30%. The design of the radiant and convective heat exchange chambers in the upper shell, combined with the burner's flame direction, forms a dual high-efficiency radiant and convective heat exchange system, improving the utilization efficiency of fuel combustion heat energy. During normal navigation, waste heat from exhaust gases is prioritized to reduce fuel consumption; fuel heating is only activated when necessary, and the fuel heating system operates efficiently, effectively reducing overall operating costs while also reducing exhaust emissions, resulting in greater environmental benefits. Manholes and observation ports on the top of the upper shell facilitate inspection, maintenance, and troubleshooting of internal equipment by maintenance personnel; the observation ports allow real-time observation of the burner's operating status, enabling operators to adjust equipment operating parameters promptly. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0027] Figure 2 This is a schematic diagram of the inner structure of the lower shell in this utility model;
[0028] Figure 3 This is a schematic diagram of the serpentine heat-receiving tube in this utility model;
[0029] The meanings of the labels in the diagram are as follows:
[0030] 1. Upper shell; 11. Upper refractory partition; 12. Manhole; 13. Observation hole; 14. Radiant heat pipe; 15. Convection heat exchanger tube; 2. Lower shell; 21. Lower refractory partition; 22. First intermediate header; 23. Second intermediate header; 24. Serpentine heat exchanger tube; 3. Insulation layer; 4. Oil inlet pipe seat; 5. Exhaust gas inlet; 6. Exhaust gas outlet; 7. Fuel oil outlet; 8. Chimney; 81. Bypass valve; 9. Burner; 10. Oil outlet manifold. Detailed Implementation
[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0032] This utility model provides a marine fuel oil exhaust gas dual-purpose organic heat carrier furnace, such as... Figure 1 , Figure 2 , Figure 3As shown, the device includes a shell, inside which a refractory partition is provided. The refractory partition includes an upper refractory partition 11 and a lower refractory partition 21. The lower refractory partition 21 divides the shell into an upper shell 1 and a lower shell 2. A burner 9 is provided at the top of the upper shell 1. A radiant heat pipe 14 and a convection heat exchange pipe 15 located around the radiant heat pipe 14 are provided inside the upper shell 1. Several serpentine heat exchange pipes 24 are provided inside the lower shell 2. A waste gas inlet 5 is provided on the bottom plate of the lower shell 2. A chimney 8 is connected to one side of both the upper shell 1 and the lower shell 2.
[0033] A refractory partition consisting of an upper refractory partition 11 and a lower refractory partition 21 is installed inside the shell, with the lower refractory partition 21 dividing the shell into an upper shell 1 and a lower shell 2, forming independent yet interconnected spaces for fuel oil heating and exhaust gas heating. The upper shell 1 has a burner 9 at its top, with radiant heat pipes 14 arranged inside and convective heat exchange pipes 15 located around it for heat transfer after fuel oil combustion. The lower shell 2 has several serpentine heat exchange pipes 24 inside, and its bottom plate has an exhaust gas inlet 5 for introducing high-temperature exhaust gas from the marine diesel engine, achieving waste heat recovery. Both the upper shell 1 and the lower shell 2 have external chimneys 8 connected to one side, respectively discharging fuel oil combustion exhaust gas and exhaust gas after heat exchange. This integrated design of fuel oil and exhaust gas as dual heat sources allows the equipment to flexibly switch or simultaneously use both heat sources according to the ship's operating conditions, ensuring heating stability. The zoning design effectively isolates different heat source operating areas, reducing heat interference and improving system operating efficiency.
[0034] In this embodiment, as Figure 1 As shown, an insulation layer 3 is provided on the outside of the shell.
[0035] An insulation layer 3 is installed on the outer side of the shell. Utilizing the low thermal conductivity of the insulation material, heat loss from the furnace interior to the external environment is reduced. This reduces heat loss, improves the thermal efficiency of the organic heat carrier furnace, and reduces energy waste. Simultaneously, it reduces the furnace surface temperature, preventing accidental burns to operators and improving operational safety.
[0036] Specifically, such as Figure 2 , Figure 3 As shown, the outlets of the radiant heat pipe 14 and the convection heat exchanger 15 are connected to the oil outlet manifold 10. The inlets of all the serpentine heat exchanger tubes 24 are connected to the oil inlet pipe seat 4 through the first intermediate header 22. The outlets of all the serpentine heat exchanger tubes 24 are connected to the inlets of the radiant heat pipe 14 and the convection heat exchanger tube 15 of the upper shell 1 through the second intermediate header 23.
[0037] The outlets of the radiant heat pipe 14 and the convection heat exchanger 15 are both connected to the oil outlet manifold 10. The inlets of all the serpentine heat exchanger pipes 24 are connected to the oil inlet pipe seat 4 through the first intermediate header 22, and the outlets are connected to the inlets of the radiant heat pipe 14 and the convection heat exchanger 15 of the upper shell 1 through the second intermediate header 23. The organic heat carrier enters the serpentine heat exchanger pipe 24 from the oil inlet pipe seat 4 through the first intermediate header 22 to absorb heat from the exhaust gas, and then enters the radiant heat pipe 14 and the convection heat exchanger 15 of the upper shell 1 through the second intermediate header 23 to further absorb heat from fuel combustion. Finally, it is output from the oil outlet manifold 10 to the heat-using area, forming a complete heat carrier circulation path. This ensures the orderly flow of the organic heat carrier within the system, achieving full absorption and transfer of waste heat from the exhaust gas and heat from fuel combustion, ensuring the continuity and stability of the heating supply; reasonable pipe connections reduce the flow resistance of the heat carrier and improve circulation efficiency.
[0038] Furthermore, such as Figure 1 As shown, the upper side of the lower casing 2 is connected to the external chimney 8 through the exhaust gas outlet 6.
[0039] The upper side of the lower shell 2 is connected to the external chimney 8 through the exhaust gas outlet 6, providing an exhaust channel for the exhaust gas after heat exchange, allowing the exhaust gas to be smoothly discharged from the furnace. Maintaining the smooth flow of exhaust gas inside the lower shell 2 ensures that the exhaust gas and the serpentine heat exchange tubes 24 can fully exchange heat; timely discharge of exhaust gas prevents the accumulation of exhaust gas inside the furnace from affecting the heat exchange effect and the normal operation of the equipment.
[0040] Furthermore, such as Figure 1 As shown, the upper side of the upper casing 1 is connected to the external chimney 8 through the fuel gas outlet 7.
[0041] The upper side of the upper shell 1 is connected to the external chimney 8 through the fuel oil flue gas outlet 7, which discharges the flue gas generated by fuel oil combustion into the furnace body. This ensures the normal operation of the combustion process inside the upper shell 1, prevents flue gas accumulation from affecting combustion efficiency and equipment safety, and allows the flue gas generated by combustion to be discharged quickly, reducing environmental pollution.
[0042] Furthermore, such as Figure 1 As shown, a manhole 12 and a fire observation hole 13 are installed on the top of the upper housing 1.
[0043] The top of the upper shell 1 is equipped with a manhole 12 and a viewing hole 13. The manhole 12 allows maintenance personnel to enter the furnace body to inspect, maintain, and repair components such as the burner 9, radiant heat pipes 14, and convective heat exchange tubes 15. The viewing hole 13 allows operators to observe the combustion status of the burner 9 from the outside, such as the shape and color of the flame. This facilitates daily maintenance and troubleshooting, extending the equipment's service life. Real-time monitoring of the combustion status through the viewing hole 13 allows for timely adjustment of the burner 9's operating parameters, ensuring complete combustion of fuel oil, improving combustion efficiency, and reducing energy consumption.
[0044] Furthermore, such as Figure 1 As shown, the space enclosed by the radiant heat pipe 14 constitutes the radiant heat exchange chamber, and the cavity between the convection heat pipe 15 and the radiant heat pipe 14 constitutes the convection heat exchange chamber. The nozzle of the burner 9 is directly opposite the center of the radiant heat exchange chamber, and the bottom of the radiant heat exchange chamber is provided with a gap that allows the flue gas to enter the convection heat exchange chamber.
[0045] The space enclosed by the radiant heat pipes 14 constitutes a radiant heat exchange chamber. The burner 9's nozzle faces the center of the radiant heat exchange chamber, allowing the flame heat to be directly transferred to the heat carrier in the radiant heat pipes 14 via radiation. A gap is provided at the bottom of the radiant heat exchange chamber to allow flue gas to enter the convection heat exchange chamber. The high-temperature flue gas generated by combustion enters the convection heat exchange chamber, which is formed by the cavity between the convection heat exchange pipe 15 and the radiant heat pipes 14, through this gap, and undergoes convective heat exchange with the convection heat exchange pipe 15, further transferring heat. This forms two efficient heat exchange methods: radiation and convection, fully utilizing the heat generated by fuel combustion, improving heat exchange efficiency, enabling the heat carrier to absorb more heat, and enhancing the equipment's heating capacity. The rational heat exchange chamber structure design optimizes the flue gas flow path, ensuring sufficient and uniform heat transfer.
[0046] Furthermore, such as Figure 1 As shown, the lower end of the chimney 8 is connected to one side of the exhaust gas inlet 5, and a bypass valve 81 is installed at the connection.
[0047] The lower end of the chimney 8 is connected to one side of the exhaust gas inlet 5, and a bypass valve 81 is installed at the connection. When the high-temperature exhaust gas discharged from the diesel engine has excessive heat, the bypass valve 81 can be opened, allowing some exhaust gas to bypass the serpentine heat exchange pipe 24 and be directly discharged into the chimney 8 through the bypass valve 81. This allows for flexible adjustment of the exhaust gas heat, preventing excessive heat absorption by the heat carrier, preventing system temperature runaway, and ensuring safe and stable equipment operation. Furthermore, it allows for reasonable control of the amount of exhaust gas participating in heat exchange according to actual heat demand, improving the rationality and economy of energy utilization.
[0048] In operation, this marine fuel oil exhaust gas dual-purpose organic heat carrier furnace operates as follows: First, during normal ship navigation, the diesel engine generates high-temperature exhaust gas. This exhaust gas enters the furnace body through the exhaust gas inlet 5 on the bottom plate of the lower shell 2. As it fills the internal space of the lower shell 2, it comes into full contact with several serpentine heat exchange tubes 24. The organic heat carrier (heat transfer oil) then enters the serpentine heat exchange tubes 24 through the oil inlet pipe seat 4 and the first intermediate header 22. The heat from the high-temperature exhaust gas is transferred to the organic heat carrier inside the tubes through the tube walls of the serpentine heat exchange tubes 24, completing the heat exchange. The organic heat carrier, having absorbed heat, enters the exhaust gas output manifold (connected to the fuel oil input manifold of the upper shell 1) through the second intermediate header 23 and continues to flow under the action of a high-temperature circulating pump. The heat-exchanged exhaust gas is then discharged from the exhaust gas outlet 6 on the upper side of the lower shell 2 and discharged into the atmosphere through the chimney 8. By utilizing the waste heat from diesel engine exhaust gas, the contact area and heat exchange time between the exhaust gas and the organic heat carrier are increased through the serpentine heat exchange tube 24, thereby realizing the transfer of heat from the exhaust gas to the organic heat carrier. This process is convective heat transfer, which fully recovers the heat in the exhaust gas for heating.
[0049] When the ship docks, the diesel engine power is insufficient or it stops, and the exhaust gas cannot meet the heating demand, the burner 9 installed on the top of the upper shell 1 is activated. The burner 9 sprays fuel oil and ignites it, producing a high-temperature flame that is directly injected into the center of the radiant heat exchange chamber surrounded by radiant heat pipes 14. The organic heat carrier inside the radiant heat pipes 14 rapidly absorbs the heat from the flame through radiant heat exchange. The high-temperature flue gas generated by combustion then enters the convection heat exchange chamber (the cavity between the convection heat exchange pipe 15 and the radiant heat pipe 14) through the gap at the bottom of the radiant heat exchange chamber, where it undergoes convective heat exchange with the organic heat carrier inside the convection heat exchange pipe 15, transferring heat again. The organic heat carrier, having absorbed both radiant and convective heat, flows out from the outlets of the radiant heat pipes 14 and the convection heat exchange pipes 15, and is transported to the heating area via the oil outlet manifold 10. The flue gas after combustion is discharged from the fuel oil flue gas outlet 7 on the upper side of the upper shell 1 and is discharged into the atmosphere through the chimney 8. Burner 9 generates high-temperature flames and flue gas by burning fuel oil. It efficiently transfers the heat energy from fuel oil combustion to the organic heat carrier through both radiative and convective heat transfer, thus meeting the heating needs of ships when there is insufficient exhaust heat.
[0050] When a ship's heating demand is high and a single exhaust gas or fuel oil heating method is insufficient, both exhaust gas heating and fuel oil heating can be used simultaneously. In this case, the high-temperature exhaust gas generated by the diesel engine still enters the lower hull 2 through the exhaust gas inlet 5 and exchanges heat with the organic heat carrier within the serpentine heat exchanger pipe 24. After absorbing the heat from the exhaust gas, the organic heat carrier flows into the upper hull 1. Simultaneously, the burner 9 starts, and the heat generated by fuel oil combustion further heats the organic heat carrier within the upper hull 1 through radiation and convection heat exchange. The double-heated organic heat carrier is then output from the oil outlet manifold 10 to the heating area, achieving efficient heating. By combining the waste heat from exhaust gas and the heat from fuel oil combustion, and through optimized pipeline connections and heat exchange structure design, the organic heat carrier absorbs heat from both heat sources sequentially, significantly improving heating capacity and meeting the ship's high-load heating demands.
[0051] When the high-temperature exhaust gas from the diesel engine generates excessive heat, causing the organic heat transfer medium to absorb too much heat, exceeding the user's needs, the bypass valve 81, installed at the connection between the lower end of the chimney 8 and the exhaust gas inlet 5, comes into play. When the operator opens the bypass valve 81, some of the high-temperature exhaust gas bypasses the serpentine heat exchanger 24 and directly enters the chimney 8 and is discharged, reducing the amount of exhaust gas participating in heat exchange. This controls the temperature rise of the organic heat transfer medium and maintains the system's thermal balance. By regulating the exhaust gas flow rate through the opening and closing of the bypass valve 81, the heat absorption of the organic heat transfer medium is controlled, preventing excessively high system temperatures, ensuring safe and stable equipment operation, and improving the rationality of energy utilization.
[0052] Finally, it should be noted that the electronic components in the burner 9 and other components in this embodiment are all general standard parts or parts known to those skilled in the art. Their structure and principle can be known to those skilled in the art through technical manuals or conventional experimental methods. In the idle part of this device, all the above-mentioned electrical components are connected by wires. The specific connection method should refer to the working order between the electrical components in the above working principle to complete the electrical connection. All of these are technologies known in the art.
[0053] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A marine fuel oil exhaust gas dual-purpose organic heat carrier furnace, comprising a shell, characterized in that: The shell is provided with a fire-resistant partition, which includes an upper fire-resistant partition (11) and a lower fire-resistant partition (21). The lower fire-resistant partition (21) divides the shell into an upper shell (1) and a lower shell (2). The top of the upper shell (1) is provided with a burner (9). The interior of the upper shell (1) is provided with a radiant heat pipe (14) and a convection heat exchange pipe (15) located around the radiant heat pipe (14). The interior of the lower shell (2) is provided with a number of serpentine heat exchange pipes (24). The bottom plate of the lower shell (2) is provided with a waste gas inlet (5). One side of both the upper shell (1) and the lower shell (2) is connected to a chimney (8).
2. The marine fuel oil exhaust gas dual-purpose organic heat carrier furnace according to claim 1, characterized in that: An insulation layer (3) is provided on the outside of the shell.
3. The marine fuel oil exhaust gas dual-purpose organic heat carrier furnace according to claim 1, characterized in that: The outlets of the radiant heat pipe (14) and the convection heat exchanger (15) are connected to the oil outlet manifold (10). The inlets of all the serpentine heat exchanger (24) are connected to the oil inlet pipe seat (4) through the first intermediate header (22). The outlets of all the serpentine heat exchanger (24) are connected to the inlets of the radiant heat pipe (14) and the convection heat exchanger (15) of the upper shell (1) through the second intermediate header (23).
4. The marine fuel oil exhaust gas dual-purpose organic heat carrier furnace according to claim 1, characterized in that: The upper side of the lower casing (2) is connected to the external chimney (8) through the exhaust gas outlet (6).
5. The marine fuel oil exhaust gas dual-purpose organic heat carrier furnace according to claim 1, characterized in that: The upper side of the upper casing (1) is connected to the external chimney (8) through the fuel gas outlet (7).
6. The marine fuel oil exhaust gas dual-purpose organic heat carrier furnace according to claim 1, characterized in that: The top of the upper housing (1) is equipped with a manhole (12) and a fire observation hole (13).
7. The marine fuel oil exhaust gas dual-purpose organic heat carrier furnace according to claim 1, characterized in that: The space enclosed by the radiant heat pipe (14) constitutes a radiant heat exchange chamber. The cavity between the convection heat exchange pipe (15) and the radiant heat pipe (14) constitutes a convection heat exchange chamber. The nozzle of the burner (9) is directly opposite the center of the radiant heat exchange chamber. The bottom of the radiant heat exchange chamber is provided with a gap that allows the flue gas to enter the convection heat exchange chamber.
8. The marine fuel oil exhaust gas dual-purpose organic heat carrier furnace according to claim 1, characterized in that: The lower end of the chimney (8) is connected to one side of the exhaust gas inlet (5), and a bypass valve (81) is installed at the connection.