Marine fuel exhaust combined steam boiler

Abstract

The utility model relates to a boiler technical field, concretely is a marine fuel waste gas combined steam boiler, including body, the inside below of cylinder is installed with hearth, the inside upper portion of cylinder is installed with outer tube, the inside of outer tube is provided with heat receiving pipe, the top of outer tube is provided with first flue gas outlet, one side of hearth is connected with combustor, the bottom of cylinder is installed with waste gas smoke box, the inside one side of cylinder is installed with a plurality of furnace tubes in vertical direction, the upper end of furnace tube is provided with second flue gas outlet, the lower extreme of furnace tube is connected with waste gas smoke box. In this marine fuel waste gas combined steam boiler, in energy utilization, hearth cooperation combustor can carry out fuel burning heating, and waste gas smoke box collects the waste gas generated during ship operation, the waste gas flows upward through the furnace tube, and the waste heat in the waste gas is fully recovered and utilized through the synergistic effect of the heat receiving pipe, effectively reducing the energy waste caused by direct discharge of waste gas, greatly improving the energy utilization efficiency, and reducing the energy cost of ship operation.

Description

Technical Field

[0001] This utility model relates to the field of boiler technology, and more specifically, to a marine fuel oil exhaust gas combined steam boiler. Background Technology

[0002] In the field of boiler technology, steam boilers are widely used in various fields such as shipbuilding. Existing steam boilers, such as the technical solution with application number 201410821293.4, have improved their practicality to some extent by connecting a preheating box to the boiler body and setting up structures such as heat insulation layers and springs. However, during ship operation, the exhaust gas generated by fuel combustion is usually directly emitted, which not only wastes energy but also has adverse effects on the environment. At the same time, the existing steam boilers fail to effectively combine fuel combustion heating with the utilization of waste heat from exhaust gas in their structural design, making it difficult to meet the needs of ships for efficient energy utilization and energy conservation and environmental protection. Therefore, there is an urgent need to develop a marine fuel-exhaust gas combined steam boiler that can efficiently utilize fuel oil and exhaust gas energy and is energy-saving and environmentally friendly. Utility Model Content

[0003] The purpose of this utility model is to provide a marine fuel oil exhaust gas combined steam boiler to solve the problem mentioned in the background art that the existing steam boilers fail to fully combine fuel oil combustion heating with exhaust gas waste heat utilization in their structural design, making it difficult to meet the needs of ships for high-efficiency energy utilization and energy conservation and environmental protection.

[0004] To achieve the above objectives, this utility model provides a marine fuel oil exhaust gas combined steam boiler, including a cylindrical body, a furnace installed at the lower interior of the cylindrical body, an outer tube installed at the upper interior of the cylindrical body, a heating tube installed inside the outer tube, a first flue gas outlet at the top of the outer tube, a burner connected to one side of the furnace, an exhaust gas box installed at the bottom of the cylindrical body, and several furnace tubes vertically installed on one side of the interior of the cylindrical body, a second flue gas outlet at the upper end of each furnace tube, and a lower end of each furnace tube connected to the exhaust gas box.

[0005] This setup utilizes a furnace at the bottom of the cylinder, in conjunction with a burner, to provide fuel combustion heating; an outer tube at the top of the cylinder forms a heat exchange structure with a heat-receiving tube; and an exhaust gas box collects ship exhaust gas, which flows upward through the furnace tubes, using the waste heat of the exhaust gas to heat the medium inside the cylinder.

[0006] Preferably, a water supply pipe is connected to one side of the bottom of the cylinder, a cleaning port is provided on the other side of the bottom of the cylinder, and an insulation layer is provided on the outer wall of the cylinder.

[0007] This feature includes a water supply pipe to replenish boiler water; a cleaning port for regular cleaning of the cylinder's interior; and an insulation layer to reduce heat loss.

[0008] Preferably, the top of the cylinder is sequentially equipped with a lifting lug, a safety valve seat, a pressure gauge seat, a main steam pipe seat, and a water level gauge.

[0009] This feature includes lifting lugs for easy equipment installation and maintenance; a safety valve pipe ensures pressure safety; pressure gauge and water level gauge provide real-time monitoring of operating parameters; and the main steam pipe provides steam output.

[0010] Preferably, an upper tube sheet is installed at the upper part of the furnace chamber and a lower tube sheet is installed at the lower part, and the bottom of the furnace chamber is connected to the bottom inner wall of the cylinder by a bracing rod.

[0011] This feature includes upper and lower tube sheets to fix the furnace structure; and bracing rods to enhance the connection strength between the furnace and the shell.

[0012] Preferably, the upper end of the heating pipe is connected to the upper interior of the cylinder, and the lower end of the heating pipe is connected to the lower interior of the cylinder.

[0013] This feature connects the upper and lower ends of the heated pipe to the cylinder to form a natural circulation loop, enhancing heat exchange by utilizing the thermosiphon principle.

[0014] Preferably, the bottom of the exhaust gas chamber is provided with an exhaust gas inlet, and a drain outlet is provided on one side of the bottom of the exhaust gas chamber.

[0015] This feature includes an exhaust gas inlet for introducing ship exhaust gas; and a wastewater outlet for periodically discharging impurities from the exhaust gas.

[0016] Preferably, a drain pipe seat is connected to the bottom of the furnace.

[0017] This feature is designed to discharge sediment and impurities from the furnace.

[0018] Preferably, the inner wall of the furnace is provided with a fire-resistant protective layer, and a fire observation tube is connected to one side of the furnace.

[0019] This feature includes a fire-resistant protective layer to resist high-temperature flame erosion; and a viewing tube to monitor the combustion status in the furnace in real time.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0021] In this marine fuel oil exhaust gas combined steam boiler, the furnace and burner can provide fuel oil combustion for heating, while the exhaust gas box collects the exhaust gas generated during ship operation. The exhaust gas flows upward through the furnace tubes and works in conjunction with the heating tubes to fully recover and utilize the waste heat in the exhaust gas. This effectively reduces energy waste caused by direct exhaust gas emissions, greatly improves energy utilization efficiency, reduces the energy cost of ship operation, and conforms to the concept of energy conservation and environmental protection.

[0022] From the perspective of equipment structure and operation and maintenance, the water supply pipe at the bottom of the boiler body facilitates the replenishment of boiler water, and the cleaning port allows for regular cleaning of internal dirt and impurities, ensuring normal boiler operation. The drain outlet at the bottom of the exhaust gas box and the drain pipe seat at the bottom of the furnace facilitate the cleaning of residual impurities in the exhaust gas and waste in the furnace, maintaining equipment cleanliness. The lifting lugs installed at the top of the boiler body facilitate equipment installation and transportation. Components such as the safety valve pipe, pressure gauge pipe seat, main steam pipe seat, and water level gauge allow for real-time monitoring of the boiler's operating status, ensuring safe and stable operation. The insulation layer of the boiler body and the refractory protective layer of the furnace inner wall reduce heat loss and protect the furnace, extending the equipment's service life. Overall, this boiler effectively addresses the shortcomings of existing steam boilers, offering good practicality and economic benefits. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the upper tube sheet in this utility model;

[0025] Figure 3 This is a schematic diagram of the furnace tube structure in this utility model;

[0026] The meanings of the labels in the diagram are as follows:

[0027] 1. Shell; 11. Water supply pipe; 12. Sewage outlet; 13. Insulation layer; 14. Lifting lug; 15. Safety valve seat; 16. Pressure gauge seat; 17. Main steam pipe seat; 18. Water level gauge; 2. Furnace; 21. Upper tube sheet; 22. Lower tube sheet; 23. Support rod; 24. Refractory protective layer; 25. Observation tube; 3. Burner; 4. Outer pipe; 41. First flue gas outlet; 5. Heating tube; 6. Waste gas box; 61. Waste gas inlet; 62. Sewage outlet; 7. Sewage pipe seat; 8. Furnace tube; 81. Second flue gas outlet. Detailed Implementation

[0028] 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.

[0029] This utility model provides a marine fuel oil exhaust gas combined steam boiler, such as... Figure 1 , Figure 3As shown, the device includes a cylindrical body 1, a furnace 2 installed at the lower part of the interior of the cylindrical body 1, an outer tube 4 installed at the upper part of the interior of the cylindrical body 1, a heating tube 5 installed inside the outer tube 4, a first flue gas outlet 41 installed at the top of the outer tube 4, a burner 3 connected to one side of the furnace 2, an exhaust gas box 6 installed at the bottom of the cylindrical body 1, and several furnace tubes 8 vertically installed on one side of the interior of the cylindrical body 1. A second flue gas outlet 81 is installed at the upper end of the furnace tubes 8, and the lower end of the furnace tubes 8 is connected to the exhaust gas box 6.

[0030] Furnace 2, located at the bottom of cylinder 1, works in conjunction with burner 3 to provide fuel oil combustion heating. An outer tube 4, located at the top of cylinder 1, forms a heat exchange structure with a heating tube 5. Combustion flue gas is discharged from the first flue gas outlet 41 at the top of the outer tube 4. Exhaust gas is collected in the exhaust gas box 6 and flows upward through furnace tube 8, utilizing waste heat to heat the medium inside cylinder 1. The waste gas is discharged from the second flue gas outlet 81 at the top of furnace tube 8. This dual utilization of fuel oil combustion and waste heat significantly improves energy efficiency and reduces exhaust gas emissions.

[0031] In this embodiment, as Figure 1 As shown, a water supply pipe 11 is connected to one side of the bottom of the cylinder 1, a cleaning port 12 is provided on the other side of the bottom of the cylinder 1, and an insulation layer 13 is provided on the outer wall of the cylinder 1.

[0032] A water supply pipe 11 on one side of the bottom of the cylinder 1 replenishes the boiler water; a cleaning port 12 on the other side of the bottom regularly cleans the internal dirt of the cylinder 1; and an insulation layer 13 on the outer wall of the cylinder 1 reduces heat loss. This ensures the normal operation of the boiler water circulation system, extends equipment life, and reduces energy consumption.

[0033] Specifically, such as Figure 1 As shown, the top of the cylinder 1 is sequentially equipped with a lifting lug 14, a safety valve seat 15, a pressure gauge seat 16, a main steam pipe seat 17, and a water level gauge 18.

[0034] The lifting lug 14 at the top of the boiler shell 1 facilitates equipment installation and maintenance; the safety valve pipe 15 ensures pressure safety; the pressure gauge pipe seat 16 and the water level gauge 18 monitor operating parameters in real time; and the main steam pipe seat 17 outputs steam. These features enhance equipment safety and maintainability, ensuring stable boiler operation.

[0035] Furthermore, such as Figure 2 As shown, an upper tube sheet 21 is installed on the upper part of the furnace 2, and a lower tube sheet 22 is installed on the lower part. The bottom of the furnace 2 is connected to the bottom inner wall of the cylinder 1 by a bracing rod 23.

[0036] The upper tube sheet 21 at the top of the furnace 2 and the lower tube sheet 22 at the bottom fix the furnace structure; the bracing rod 23 connects the bottom of the furnace 2 to the inner wall of the bottom of the cylinder 1, enhancing the connection strength. This improves the furnace's pressure-bearing capacity and ensures structural stability under high temperature and high pressure conditions.

[0037] Furthermore, such as Figure 1 As shown, the upper end of the heating pipe 5 is connected to the upper interior of the cylinder 1, and the lower end of the heating pipe 5 is connected to the lower interior of the cylinder 1.

[0038] The upper and lower ends of the heating pipe 5 are connected to the upper and lower parts of the interior of the cylinder 1, respectively, forming a natural circulation loop. This enhances heat exchange using the thermosiphon principle, thereby improving heat exchange efficiency, reducing energy consumption, and ensuring stable steam production.

[0039] Furthermore, such as Figure 1 As shown, the bottom of the exhaust gas chamber 6 is provided with an exhaust gas inlet 61, and a drain outlet 62 is provided on one side of the bottom of the exhaust gas chamber 6.

[0040] The exhaust gas inlet 61 at the bottom of the exhaust gas chamber 6 introduces ship exhaust gas; the drain outlet 62 on one side at the bottom periodically discharges impurities from the exhaust gas. This optimizes the exhaust gas flow path, reduces ash accumulation and blockage, and extends the service life of the equipment.

[0041] Furthermore, such as Figure 1 As shown, the bottom of the furnace chamber 2 is connected to a drain pipe seat 7.

[0042] The drain pipe seat 7 at the bottom of the furnace 2 discharges deposits and impurities from the furnace. This prevents scale buildup from affecting combustion efficiency and reduces maintenance costs.

[0043] Furthermore, such as Figure 2 As shown, the inner wall of the furnace 2 is provided with a fire-resistant protective layer 24, and a fire observation tube 25 is connected to one side of the furnace 2.

[0044] The refractory protective layer 24 on the inner wall of the furnace 2 resists the erosion of high-temperature flames; the observation tube 25 allows for real-time monitoring of the combustion status in the furnace. This extends the service life of the furnace, facilitates operator monitoring of the combustion process, and ensures safe and efficient operation.

[0045] In operation, this marine fuel oil exhaust gas combined steam boiler operates as follows: Upon startup, the burner 3 delivers fuel oil into the furnace 2 for combustion. Within the enclosed furnace 2, the fuel oil burns thoroughly, releasing a significant amount of heat energy, which is directly used to heat the medium inside the boiler shell 1. Simultaneously, the flue gas generated by combustion rises into the heat exchange structure formed by the outer tube 4 and the heating tube 5. The heat carried by the flue gas is transferred through the tube wall to the medium inside the heating tube 5. After the first heat exchange, the flue gas is discharged from the boiler through the first flue gas outlet 41. Exhaust gas generated during ship operation enters the boiler through the exhaust gas inlet 61 at the bottom of the exhaust gas box 6. The exhaust gas flows upwards along the furnace tube 8, where it exchanges heat with the medium inside the boiler shell 1, transferring residual heat from the exhaust gas to the medium to further heat the water inside the boiler shell 1, achieving efficient utilization of the waste heat. After heat exchange, the exhaust gas is discharged from the second flue gas outlet 81 at the top of the furnace tube 8, reducing energy waste and environmental pollution caused by direct exhaust gas emissions.

[0046] Water is supplied to the boiler through the water supply pipe 11 on one side of the bottom of the cylinder 1, forming a stable water circulation system. The upper and lower ends of the heating pipe 5 are connected to the upper and lower parts of the cylinder 1, respectively. Utilizing the principle of thermosiphon, the density of the water inside the cylinder 1 changes after being heated, resulting in natural circulation. Under the dual heating of fuel combustion and waste heat from exhaust gas, the water continuously absorbs heat, gradually rises in temperature, and vaporizes to form steam.

[0047] The safety valve pipe 15 at the top of the boiler body 1 monitors the internal pressure in real time. When the pressure exceeds the set value, it automatically opens to release pressure, ensuring the safe operation of the boiler. The pressure gauge pipe seat 16 and the water level gauge 18 are used to monitor the pressure and water level, respectively, and the operator can adjust the operating parameters according to the data. During operation, the drain pipe seat 7 at the bottom of the furnace 2, the drain port 62 at the bottom of one side of the exhaust gas box 6, and the cleaning port 12 at the bottom of the boiler body 1 can regularly clean the deposits, impurities, and dirt in various parts to maintain the cleanliness of the equipment and ensure combustion efficiency and heat exchange effect. At the same time, the refractory protective layer 24 on the inner wall of the furnace 2 resists high temperature corrosion, and the observation tube 25 allows the operator to observe the combustion status and adjust the combustion conditions in a timely manner.

[0048] The generated steam is output through the main steam pipe seat 17 to power other equipment on the ship, completing the entire energy conversion and output process. Throughout the operation, the insulation layer 13 on the outer wall of the cylinder 1 reduces heat loss, and the upper tube sheet 21, lower tube sheet 22, and bracing rod 23 of the furnace 2 ensure the stability of the furnace structure, enabling the boiler to operate safely, efficiently, and stably.

[0049] 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 combined steam boiler, comprising a shell (1), characterized in that: A furnace (2) is installed at the bottom inside the cylinder (1). An outer tube (4) is installed at the top inside the cylinder (1). A heating tube (5) is installed inside the outer tube (4). A first flue gas outlet (41) is provided at the top of the outer tube (4). A burner (3) is connected to one side of the furnace (2). A waste gas smoke box (6) is installed at the bottom of the cylinder (1). Several furnace tubes (8) are vertically installed on one side inside the cylinder (1). A second flue gas outlet (81) is provided at the upper end of the furnace tube (8). The lower end of the furnace tube (8) is connected to the waste gas smoke box (6).

2. The marine fuel oil exhaust gas combined steam boiler according to claim 1, characterized in that: A water supply pipe (11) is connected to one side of the bottom of the cylinder (1), a cleaning port (12) is provided on the other side of the bottom of the cylinder (1), and a heat insulation layer (13) is provided on the outer wall of the cylinder (1).

3. The marine fuel oil exhaust gas combined steam boiler according to claim 1, characterized in that: The top of the cylinder (1) is sequentially equipped with a lifting lug (14), a safety valve seat (15), a pressure gauge seat (16), a main steam pipe seat (17), and a water level gauge (18).

4. The marine fuel oil exhaust gas combined steam boiler according to claim 1, characterized in that: The upper part of the furnace (2) is equipped with an upper tube plate (21), and the lower part is equipped with a lower tube plate (22). The bottom of the furnace (2) is connected to the bottom inner wall of the cylinder (1) by a bracing rod (23).

5. The marine fuel oil exhaust gas combined steam boiler according to claim 1, characterized in that: The upper end of the heating pipe (5) is connected to the upper interior of the cylinder (1), and the lower end of the heating pipe (5) is connected to the lower interior of the cylinder (1).

6. The marine fuel oil exhaust gas combined steam boiler according to claim 1, characterized in that: The bottom of the exhaust gas chamber (6) is provided with an exhaust gas inlet (61), and a drain outlet (62) is provided on one side of the bottom of the exhaust gas chamber (6).

7. The marine fuel oil exhaust gas combined steam boiler according to claim 1, characterized in that: The bottom of the furnace (2) is connected to a drain pipe seat (7).

8. The marine fuel oil exhaust gas combined steam boiler according to claim 1, characterized in that: The inner wall of the furnace (2) is provided with a fire-resistant protective layer (24), and a fire observation tube (25) is connected to one side of the furnace (2).

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