Marine supercharged boiler oil supply

Abstract

The utility model relates to a marine supercharged boiler oil supply device relates to heavy oil supply technology field, and the utility model discloses in order to solve the existing marine boiler oil supply device when switching pipeline after completing heating will cause pressure to increase suddenly, fuel oil can be sprayed to opposite furnace or boiler tube bundle, and serious can cause pipeline rupture problem, it includes oil tank and fuel oil heater, oil inlet pipe, fuel oil switching valve, oil return pipe, oil supply pipe and oil return nozzle simulator, the oil outlet of oil tank and fuel oil heater is connected with oil inlet pipe, and the other end of oil inlet pipe is connected with the oil inlet of fuel oil switching valve, and the upper oil outlet of fuel oil switching valve is connected with oil supply pipe, and the lower oil outlet of fuel oil switching valve is connected with oil return nozzle simulator, and the other end of oil return nozzle simulator is connected with oil return pipe, and the utility model is used for marine supercharged boiler oil supply, and the low temperature heavy oil in oil inlet pipe is pumped back to oil tank and fuel oil heater and reheats, can make the heavy oil in input hearth reach combustion temperature.

Description

Technical Field

[0001] This invention relates to the field of heavy oil supply technology, and in particular to a marine booster boiler oil supply device. Background Technology

[0002] Heavy oil is the residue remaining after crude oil has been fractionated to extract gasoline, kerosene, and diesel. Sometimes, the oil remaining after further vacuum distillation to extract lubricating oil is also called heavy oil. Heavy oil is characterized by its large molecular weight and high viscosity. It has a low pour point, generally between 22 and 36°C, and a high flash point. Therefore, heavy oil requires heating and pressurization before being transported to the combustion chamber and atomized through an atomizing nozzle. Heavy oil is mainly used as fuel for large steam turbine boilers and engines in medium to large ships.

[0003] In existing technologies, heating the oil tank is commonly used to increase the temperature of the heavy oil before combustion. The low-temperature heavy oil remaining in the delivery pipeline is then returned to the oil tank via the return pipeline for reheating. Because the pipeline supplying oil to the combustion chamber has a high-resistance, high-pressure nozzle at its end, while the return pipeline has lower pressure, a sudden pressure increase can occur when switching pipelines after heating, potentially leading to water hammer. Furthermore, fuel oil may spray onto the opposite furnace or boiler tube bundle, and in severe cases, this can cause pipeline rupture. Summary of the Invention

[0004] In order to solve the problem that existing marine boiler oil supply devices cause a sudden increase in pressure when switching pipelines after heating is completed, which may cause fuel oil to spray into the opposite furnace or boiler tube bundle, and in severe cases, pipeline rupture, the present invention provides a marine booster boiler oil supply device to solve the problems mentioned in the background art.

[0005] The technical solution of this invention is:

[0006] A marine booster boiler oil supply device includes an oil tank and fuel oil heater, an oil inlet pipe, a fuel oil switching valve, an oil return pipe, an oil supply pipe, and an oil return nozzle simulator;

[0007] The fuel tank and fuel heater outlet is connected to an inlet pipe, the other end of which is connected to the inlet of the fuel switching valve. The upper outlet of the fuel switching valve is connected to a fuel supply pipe, and the lower outlet of the fuel switching valve is connected to a return nozzle simulator. The other end of the return nozzle simulator is connected to a return pipe, which is connected to the return port of the fuel tank and fuel heater. The return nozzle simulator acts as a throttling device to reduce the flow rate in the inlet pipe.

[0008] Furthermore, the return oil nozzle simulator includes an end cap nut and a housing. The end cap nut is fixedly connected to the right end of the housing, and the end cap nut and the housing are sealed together by a washer I. An inlet pipe is provided at the upper end of the housing, and the inlet pipe is connected to the lower oil outlet of the fuel switching valve. A sealing nut is fixed at the left end of the end cap nut, and the sealing nut is connected to the inlet pipe. An atomizing plate is installed at the left end of the sealing nut. The atomizing plate is used to atomize heavy oil and achieve a throttling effect. An oil outlet is provided at the left end of the housing.

[0009] Furthermore, the outer side of the middle section of the sealing nut is sealed to the inner wall of the housing via a sealing ring.

[0010] Furthermore, an oil distribution threaded connector is fixed to the left end of the sealing nut, and a clamping nut is fixed to the left end of the oil distribution threaded connector. The clamping nut fixes the atomizing plate to the left end of the oil distribution threaded connector.

[0011] Furthermore, the atomizing plate has a conical through hole at its center, through which high-pressure heavy oil is atomized.

[0012] Furthermore, the housing has an oil inlet chamber, the inlet pipe is connected to the oil inlet chamber, the sealing nut has a central chamber, and the side wall of the sealing nut has multiple square openings. The square openings allow heavy oil to pass through the sealing nut from the oil inlet chamber into the central chamber. The clamping nut and the oil distribution threaded joint are both designed with a central opening structure, so that the inlet pipe, the oil inlet chamber, the central chamber, the atomizing plate and the oil outlet are connected to form an atomized oil circuit.

[0013] Furthermore, an oil injector is installed on the oil supply pipe, and the nozzle of the oil injector is installed on the furnace.

[0014] Furthermore, a pressure gauge is installed on the oil inlet pipe.

[0015] Furthermore, the flow rate of heavy oil pumped into the inlet pipe by the oil tank and fuel heater is a fixed value.

[0016] Furthermore, the tank and fuel heater heat the heavy oil pumped into the inlet pipe to 70°C.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. A marine pressurized boiler oil supply device, equipped with an oil tank, a fuel oil heater and a fuel oil switching valve, which can re-supply unheated heavy oil in the oil inlet pipe to the oil tank and fuel oil heater through the oil return pipe for heating, thereby preventing unheated heavy oil remaining in the oil inlet pipe from being sprayed into the furnace and failing to reach the combustion temperature.

[0019] 2. After heating is completed, rotate the fuel oil switching valve to switch the oil inlet pipe from the connecting return oil pipe to the connecting supply oil pipe, and pump the heavy oil into the furnace. Since the return oil nozzle simulator is installed in the return oil pipe to play a throttling and pressurizing role, the pressure in the return oil pipe before the switch is the same as the pressure in the supply oil pipe after the switch. This achieves the goal of not having to change the output pressure of the oil pump in the oil tank and fuel oil heater. Moreover, the entire pipeline bears the same pressure before and after the switch, so that the fuel oil will not spray into the opposite furnace chamber or boiler tube bundle, and also prevents the occurrence of water hammer effect and reduces the risk of pipeline rupture.

[0020] 3. The structure of the return oil nozzle simulator is similar to that of the fuel injector. The resistance to heavy oil is the same as that of the fuel injector. Therefore, the same oil pressure can be formed in the return oil pipe as in the supply oil pipe. The returned heavy oil is atomized. The atomized heavy oil is heated faster in the return oil tank and fuel heater. After completing one cycle, it can directly enter the ignition process. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the oil circuit of the oil supply device of the present invention;

[0022] Figure 2 This is a longitudinal cross-sectional view of the return oil nozzle simulator in the oil supply device of the present invention.

[0023] In the diagram: 1. Fuel switching valve; 2. Return fuel nozzle simulator; 3. Fuel inlet pipe; 4. Fuel return pipe; 5. Fuel supply pipe; 6. Pressure gauge; 7. Fuel tank and fuel heater; 8. Injector; 9. Furnace; 201. End cap nut; 202. Washer I; 203. Inlet pipe; 204. Intermediate chamber; 205. Sealing nut; 206. Compression nut; 207. Atomizing plate; 208. Housing; 209. Fuel outlet; 210. Fuel distributor threaded connector; 211. Fuel inlet chamber; 212. Square opening; 213. Fuel guide chamber. Detailed Implementation

[0024] Specific implementation method one: See Figure 1-2 As shown, a marine booster boiler oil supply device includes an oil tank and fuel oil heater 7, an oil inlet pipe 3, a fuel oil switching valve 1, an oil return pipe 4, an oil supply pipe 5, and an oil return nozzle simulator 2.

[0025] The fuel tank and fuel heater 7 have an outlet connected to an inlet pipe 3. The other end of the inlet pipe 3 is connected to the inlet of the fuel switching valve 1. The upper outlet of the fuel switching valve 1 is connected to a fuel supply pipe 5. The lower outlet of the fuel switching valve 1 is connected to a return nozzle simulator 2. The other end of the return nozzle simulator 2 is connected to a return pipe 4. The return pipe 4 is connected to the return port of the fuel tank and fuel heater 7. The return nozzle simulator 2 acts as a throttling device to reduce the flow rate in the inlet pipe 3.

[0026] Specific Implementation Method Two: See Figure 1-2As shown, in this embodiment, an oil injector 8 is installed on the oil supply pipe 5, and the nozzle of the oil injector 8 is installed on the furnace 9.

[0027] Specific implementation method three: See Figure 1-2 As shown, a pressure gauge 6 is installed on the oil inlet pipe 3 in this embodiment.

[0028] Detailed Implementation Method Four: See [link] Figure 1-2 As shown, in this embodiment, the flow rate of heavy oil pumped into the oil inlet pipe 3 by the oil tank and fuel heater 7 is a fixed value.

[0029] Specific implementation method five: See Figure 1-2 As shown, the oil tank and fuel heater 7 of this embodiment heat the heavy oil pumped into the oil inlet pipe 3 to 70°C.

[0030] Furthermore, the fuel tank and fuel heater are equipped with a heating device and a fuel pump. The heating device heats the heavy fuel oil in the tank. During the preheating and combustion stages, the heating temperature of the heating device is 70°C, and the output pressure of the fuel pump is a fixed value. The fuel switching valve 1 is a three-way valve, which controls the flow of fuel from the inlet pipe 3 into the return pipe 4 or the supply pipe 5. The injector 8 is an atomizing injector. The nozzle of the injector 8 is installed inside the furnace 9. Pressurized heavy fuel oil is atomized by the injector 8 and injected into the furnace 9 for combustion. The pressure gauge 6 is used to detect the pressure in the pipeline. When the fuel switching valve is switched to position B, the pressure gauge 6 detects the pressure in the inlet pipe 3 and the supply pipe 5. When the fuel switching valve is switched to position C, the pressure gauge 6 detects the pressure in the inlet pipe 3 and the return pipe 4.

[0031] Further, the preheating process begins. The valve handle of fuel switching valve 1 is rotated to position C. At this time, the fuel tank, fuel heater 7, fuel inlet pipe 3, return fuel nozzle simulator 2, and return fuel pipe 4 form a heating circuit. The heating device and fuel pump are started in sequence. The heating temperature of the heavy oil by the heating device is set to 70°C, and the output power of the fuel pump is set to the ignition power, so that the heavy oil in the heating circuit is completely circulated until the fuel inlet pipe 3 is completely filled with heated heavy oil. Then, the ignition process begins. The output power of the fuel pump is kept at the ignition power, and the valve handle of fuel switching valve 1 is rotated to position B. The fuel tank, fuel heater 7, fuel inlet pipe 3, fuel supply pipe 5, and fuel injector 8 form a fuel injection circuit. The heavy oil is atomized and sprayed out by fuel injector 8 and enters the furnace 9 for ignition, entering the boiler combustion stage.

[0032] Furthermore, through the above structure, unheated heavy oil in the inlet pipe 3 can be returned to the oil tank and fuel oil heater 7 for heating via the return pipe 4, preventing unheated heavy oil remaining in the inlet pipe 3 from being sprayed into the furnace 9 and failing to reach the combustion temperature. After heating is completed, the fuel oil switching valve 1 is rotated to switch the inlet pipe 3 from the connection to the return pipe 4 to the connection to the supply pipe 5, pumping the heavy oil into the furnace 9. Since the return nozzle simulator 2 in the return pipe 4 plays a throttling and pressurizing role, the pressure in the return pipe 4 before the switch is the same as the pressure in the supply pipe 5 after the switch. This achieves the goal of not needing to change the output pressure of the oil pump in the oil tank and fuel oil heater 7, and the entire pipeline bears the same pressure before and after the switch, preventing fuel from being sprayed into the opposite furnace chamber or boiler tube bundle, and also preventing the occurrence of water hammer effect and reducing the risk of pipeline rupture.

[0033] Specific implementation method six: See Figure 2 As shown, the return oil nozzle simulator 2 of this embodiment includes an end cap nut 201 and a housing 208. The end cap nut 201 is fixedly connected to the right end of the housing 208. The end cap nut 201 and the housing 208 are sealed together by a washer I 202. An inlet pipe 203 is provided at the upper end of the housing 208. The inlet pipe 203 is connected to the lower oil outlet of the fuel switching valve 1. A sealing nut 205 is fixed at the left end of the end cap nut 201. The sealing nut 205 is connected to the inlet pipe 203. An atomizing plate 207 is installed at the left end of the sealing nut 205. The atomizing plate 207 is used to atomize heavy oil and achieve a throttling effect. An oil outlet 209 is provided at the left end of the housing 208. The oil outlet 209 is connected to the return oil pipe 4.

[0034] Detailed implementation method seven: See Figure 2 As shown, in this embodiment, the outer side of the middle section of the sealing nut 205 is sealed to the inner wall of the housing 208 through a sealing ring.

[0035] Detailed implementation method seven: See Figure 2 As shown, in this embodiment, the left end of the sealing nut 205 is fixed with an oil distribution threaded connector 210, and the left end of the oil distribution threaded connector 210 is fixed with a clamping nut 206. The clamping nut 206 fixes the atomizing plate 207 to the left end of the oil distribution threaded connector 210.

[0036] Furthermore, the housing 208 is a cylindrical hollow tubular structure. The housing 208 is detachably fixed to the sealing nut 205 via threads. The end cap nut 201 is fixedly connected to the sealing nut 205 via a T-shaped connecting part. The sealing nut 205 has an annular groove in the middle, and a sealing ring is embedded in the groove. The sealing ring is used to seal against the inner wall of the housing 208. The left end of the sealing nut 205 is fixed to the oil distribution threaded connector 210 via threads. The left end of the oil distribution threaded connector 210 is fixed to the compression nut 206 via threads. The atomizing plate 207 is fixed inside the compression nut 206. The compression nut 206 has a limiting shoulder. The limiting shoulder of the compression nut 206 and the left end face of the oil distribution threaded connector 210 respectively abut against both ends of the atomizing plate 207 to fix the atomizing plate 207.

[0037] Detailed implementation method seven: See Figure 2 As shown, the atomizing plate 207 in this embodiment has a conical through hole at its center, through which high-pressure heavy oil is atomized.

[0038] Detailed implementation method seven: See Figure 2 As shown, the housing 208 of this embodiment has an oil inlet chamber 211, and the inlet pipe 203 connects to the oil inlet chamber 211. The center of the sealing nut 205 has an intermediate chamber 204, and the side wall of the sealing nut 205 has multiple square openings 212. The square openings 212 allow heavy oil to pass through the sealing nut 205 from the oil inlet chamber 211 into the intermediate chamber 204. The clamping nut 206 and the oil distribution threaded connector 210 are both set as center opening structures, so that the inlet pipe 203, the oil inlet chamber 211, the intermediate chamber 204, the atomizing plate 207 and the oil outlet 209 are connected to form an atomized oil circuit.

[0039] Furthermore, the atomizing plate 207 is selected to be the same as the atomizing plate in the injector 8. Heavy oil enters the oil inlet chamber 211 from the inlet pipe 203, and enters the intermediate chamber 204 from the oil chamber 211 through the square opening 212. Then, the heavy oil passes through the center opening of the oil distribution threaded joint 210, the conical atomizing hole of the atomizing plate 207 and the center opening of the clamping nut 206 in sequence, and completes atomization in the conical atomizing hole of the atomizing plate 207. Then, the atomized heavy oil enters the return oil pipe 4 through the oil outlet 209 and finally returns to the fuel tank and fuel heater 7.

[0040] Furthermore, the structure of the return oil nozzle simulator is similar to that of the fuel injector, and the resistance to heavy oil is the same as that of the fuel injector. Therefore, the same oil pressure can be formed in the return oil pipe as in the supply oil pipe, and the returned heavy oil is atomized. The atomized heavy oil is heated faster in the return oil tank and fuel heater, and can directly enter the ignition process after completing one cycle.

Claims

1. A fuel oil supply device for a supercharged boiler of a ship, which comprises a fuel tank and a fuel oil heater (7), a fuel oil inlet pipe (3), a fuel oil switching valve (1), a fuel oil return pipe (4) and a fuel oil supply pipe (5), characterized in that: It also includes the return nozzle simulator (2); The oil tank and fuel heater (7) are connected with the oil inlet pipe (3), the other end of the oil inlet pipe (3) is connected with the oil inlet of the fuel switching valve (1), the upper oil outlet of the fuel switching valve (1) is connected with the oil supply pipe (5), the lower oil outlet of the fuel switching valve (1) is connected with the return nozzle simulator (2), the other end of the return nozzle simulator (2) is connected with the return pipe (4), the return pipe (4) is connected with the oil return port of the oil tank and fuel heater (7), the return nozzle simulator (2) plays a throttling role to reduce the flow in the oil inlet pipe (3); The oil supply pipe (5) is provided with a fuel injector (8), and the nozzle of the fuel injector (8) is installed on the furnace (9); The return nozzle simulator (2) plays a role of throttling and pressurizing, so that the pressure in the return pipe (4) before switching is the same as the pressure in the oil supply pipe (5) after switching; The oil tank and fuel heater are provided with a heating device.

2. A marine supercharged boiler oil feed arrangement according to claim 1, characterised in that: The return nozzle simulator (2) includes an end cover nut (201) and a shell (208), the end cover nut (201) is fixedly connected to the right end of the shell (208), the end cover nut (201) and the shell (208) are sealingly connected through a gasket I (202), the upper end of the shell (208) is provided with an inlet pipe (203), the inlet pipe (203) is in communication with the lower oil outlet of the fuel switching valve (1), the left end of the end cover nut (201) is fixedly provided with a sealing nut (205), the sealing nut (205) is in communication with the inlet pipe (203), the left end of the sealing nut (205) is provided with an atomizing sheet (207), the atomizing sheet (207) is used for atomizing heavy oil and achieving a throttling effect, and the left end of the shell (208) is provided with an oil outlet (209).

3. A marine supercharged boiler oil feed arrangement according to claim 2, characterised in that: The outer side of the middle section of the sealing nut (205) is sealingly connected with the inner wall of the shell (208) through a sealing ring.

4. A marine supercharged boiler oil feed arrangement according to claim 2, characterised in that: The left end of the sealing nut (205) is fixedly provided with a split oil threaded joint (210), the left end of the split oil threaded joint (210) is fixedly provided with a compression nut (206), and the compression nut (206) fixes the atomizing sheet (207) to the left end of the split oil threaded joint (210).

5. A marine supercharged boiler oil feed arrangement according to claim 2, characterised in that: The center of the atomizing sheet (207) is provided with a conical through hole, and high-pressure heavy oil passes through the through hole to complete atomization.

6. A marine supercharged boiler oil feed arrangement according to claim 4, characterised in that: The shell (208) is provided with an oil inlet chamber (211) therein, the inlet pipe (203) is in communication with the oil inlet chamber (211), the center of the sealing nut (205) is provided with an intermediate chamber (204), the side wall of the sealing nut (205) is provided with a plurality of square openings (212), the square openings (212) allow heavy oil to pass from the oil inlet chamber (211) to the intermediate chamber (204) through the sealing nut (205), and the compression nut (206) and the split oil threaded joint (210) are both provided with a center opening structure, so that the inlet pipe (203), the oil inlet chamber (211), the intermediate chamber (204), the atomizing sheet (207) and the oil outlet (209) are in communication to form an atomized oil path.

7. A marine forced draft boiler oil feed apparatus as defined in claim 1 wherein: The pressure gauge (6) is installed on the oil inlet pipe (3).

8. A marine forced draft boiler oil feed apparatus as defined in claim 1 wherein: The flow of heavy oil pumped into the oil inlet pipe (3) by the oil tank and fuel heater (7) is a fixed value.

9. A marine forced draft boiler oil feed apparatus as defined in claim 1 wherein: The oil tank and fuel heater (7) heat the heavy oil pumped into the oil inlet pipe (3) to 70°C.

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