Marine fuel preheating and mixing device

Abstract

The invention provides a ship fuel oil preheating and mixing device, and relates to the technical field of ship equipment, the ship fuel oil preheating and mixing device comprises a device bottom plate and a fuel oil preheating boiler, the upper end of the device bottom plate is fixedly provided with an oil storage large bin base, the upper end of the oil storage large bin base is fixedly provided with an oil storage large bin, and the fuel oil preheating boiler is fixedly installed on the surface of the upper end of the device bottom plate; fuel oil in the large oil storage bin is barged out by starting the large bin barge pump and enters the fuel oil depositing tank, part of the preheated fuel oil is separated out in the whole preheating process, heat preservation is conducted in the fuel oil daily tank, and fuel energy can be provided for restarting operation of the boiler while other fuel oil equipment is convenient to use.

Description

Technical Field

[0001] The invention relates to the technical field of ship equipment, in particular to a ship fuel preheating and oil mixing device. Background Art

[0002] Most large ship engines use heavy oil fuel, which has high viscosity and poor fluidity at room temperature and cannot be directly transferred and used. Therefore, the fuel needs to be heated before transfer or use. The main purpose of the ship's tank heating energy-saving system is to reduce the heating capacity of the fuel tank, and to achieve the minimum consumption of preheating energy while ensuring the rated consumption of the main engine fuel. For example, in the application number CN202321416596.4, a mixing device for a ship fuel heating system is used. During the use of the above technical solution, the fuel in the large tank is extracted and heated before it can be used. It cannot be used when it is not preheated to a specific temperature. The system sends the preheated hot oil from the sedimentation tank to the storage tank, and mixes it with the room temperature fuel in the storage tank into warm oil with appropriate temperature and good fluidity, and then transfers it to the fuel sedimentation tank by the transfer pump for standby or insulation standby, realizing the transfer and temporary storage of fuel. When the fuel is preheated, once the ship is docked at the port, the engine will be turned off and the boiler will be shut down, resulting in no energy to preheat the boiler when restarting. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a ship fuel preheating and oil mixing device, which solves the problems raised in the background technology.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: A ship fuel preheating and mixing device, comprising a device bottom plate and a fuel preheating boiler, wherein a large oil storage tank base is fixedly installed on the upper end of the device bottom plate, a large oil storage tank is fixedly installed on the upper end of the large oil storage tank base, and the fuel preheating boiler is fixedly installed on the upper end surface of the device bottom plate; The upper ends of the fuel oil preheating boiler and the large oil storage bin are connected with a boiler fuel oil return pipe.

[0005] Preferably, a tank mounting base is provided on one side of the fuel preheating boiler, a tank bracket is provided on the upper end of the tank mounting base, and two fuel sedimentation tanks and two fuel daily tanks are fixedly mounted on the upper end of the tank bracket.

[0006] Preferably, a sedimentation tank balance pipe is connected to the upper end between the two fuel sedimentation tanks, a daily tank balance pipe is connected to the upper end between the two daily fuel tanks, and one end of the daily tank balance pipe is connected to a daily tank external adjustment connection pipe; The lower ends of the two fuel oil sedimentation tanks are fixedly provided with sedimentation tank lower outlet pipes, and the lower ends of the two fuel oil daily tanks are fixedly provided with daily tank lower outlet pipes. The lower ends of the sedimentation tank lower outlet pipes and the daily tank lower outlet pipes are connected to the tank body main flow pipe.

[0007] Preferably, the lower end of the large oil storage tank is connected to an oil tanker pump oil pipe, a large tanker oil pump is arranged on the oil tanker pump oil pipe, and the output port of the large tanker oil pump is connected to an oil tanker pump oil outlet pipe; The oil outlet pipe of the oil transfer pump is fixedly connected to the balance pipe of the sedimentation tank.

[0008] Preferably, a separation pump oil inlet pipe is connected to the main pipe of the tank body and located between the fuel oil sedimentation tank and the fuel oil daily tank, the upper end of the separation pump oil inlet pipe is connected to a boiler separation pump, and the output port of the boiler separation pump is connected to a separation pump oil outlet pipe; A boiler combustion pipe is connected on the main flow pipe of the tank body and is located between the two daily fuel oil tanks.

[0009] Preferably, the fuel oil preheating boiler comprises: a boiler tank, a reflux side plate, a fuel oil storage tank, a boiler pressure relief pipe, a boiler pressure relief valve, a fuel oil return tank pump, a return tank pump oil outlet pipe, a spray gun side plate, a preheating oil inlet pipe, a boiler spray gun, a spray gun oil inlet pipe, a boiler inner partition, a return tank pump oil extraction pipe, a thermal insulation layer plate, a hot oil tank, a preheating oil tank, a connecting hole, and a heating pipe outlet hole; A return side plate is fixedly installed on one side of the boiler tank, a fuel oil storage bin is fixedly installed on the return side plate, and a heating pipe outlet hole is opened on the return side plate and below the fuel oil storage bin; A spray gun side plate is fixedly installed on the other side of the boiler tank body, a preheating oil inlet pipe is connected to the spray gun side plate, a boiler spray gun is fixedly installed on the outer side of the spray gun side plate, and a spray gun oil inlet pipe is connected to one side of the boiler spray gun; A boiler pressure relief pipe is fixedly installed at the middle upper end of the boiler tank, a boiler pressure relief valve is arranged at the top of the boiler pressure relief pipe, a boiler inner baffle is integrally arranged on the inner wall of the boiler tank, and a heat-insulating insulation plate is arranged between the boiler inner baffle and the spray gun side plate; The thermal insulation isolation plate separates two empty tanks, namely the hot oil tank and the preheating oil tank, between the boiler inner partition and the spray gun side plate. A fuel return pump is fixedly installed on the boiler tank body and located in the hot oil outlet tank. The input port of the fuel return pump is connected to a return pump suction pipe, and the output port of the fuel return pump is connected to a return pump oil outlet pipe.

[0010] Preferably, the upper end of the oil outlet pipe of the return pump is fixedly connected to the boiler fuel return pipe.

[0011] Preferably, a preheating chamber is fixedly installed on the inner side of the inner partition of the boiler, a corrugated pressurizing pipe is connected between the inner wall of the preheating chamber and the spray gun side plate, and a corrugated boiler heating pipe is arranged between the outer wall of the preheating chamber and the return side plate.

[0012] Preferably, a hot oil pump mounting plate is fixedly installed in the preheating chamber, a hot oil pump is fixedly installed on the upper end of the hot oil pump mounting plate, and a hot oil pump extraction pipe is connected to the lower end of the hot oil pump.

[0013] Preferably, a plurality of first hot oil pipelines are connected to the outside of the preheating chamber and located above the hot oil pump installation plate, and a plurality of second hot oil pipelines are connected between the boiler inner baffle and the return side plate; The first hot oil pipeline and one end of the first hot oil pipeline are connected to the fuel storage bin.

[0014] The present invention provides a ship fuel preheating and oil mixing device, which has the following beneficial effects: (1) The present invention starts the oil transfer pump in the oil storage tank to transfer the fuel into the fuel sedimentation tank, separates a portion of the preheated fuel during the preheating process, and keeps it warm in the daily fuel tank, which is convenient for other fuel equipment to use and can provide fuel energy for the restart of the boiler; (2) The present invention uses a boiler separation pump to extract the fuel with low temperature at the lower end of the fuel sedimentation tank through the separation pump oil inlet pipe, and pumps it into the fuel preheating boiler through the separation pump oil outlet pipe, and provides the fuel with higher temperature in the fuel daily tank to the fuel preheating boiler through the boiler combustion pipe, so that the fuel can be heated and returned to the large oil storage tank through the boiler fuel return pipe. The cycle is repeated, and the fuel in the large oil storage tank will be heated as a whole, which is convenient for ships to use in cold water; (3) The present invention provides the fuel with a relatively high temperature in the fuel daily tank to the spray gun oil inlet pipe through the boiler combustion pipe, and then enters the boiler spray gun through the spray gun oil inlet pipe, and is then ignited by the boiler spray gun, and the flame is sprayed into the corrugated boiler heating tube by pressurizing through the corrugated pressurizing tube. The irregular shape of the outer end of the corrugated boiler heating tube contacts the water inside the boiler tank body, and the water inside can be heated; (4) The present invention pumps fuel into the preheating oil inlet pipe connected to the separation pump through the separation pump outlet pipe, and passes the fuel into the preheating oil tank through the preheating oil inlet pipe, and then flows into the preheating tank through the connecting hole opened at the lower end of the partition in the boiler, and starts the hot oil pump to pump the fuel into the first hot oil pipeline through the hot oil pump suction pipe. The fuel conducts heat in the water heated to a high temperature through the first hot oil pipeline, and is insulated and refluxed in the fuel storage tank, and then returns to the hot oil tank after being insulated and heated again through the second hot oil pipeline. Then, the fuel return pump is started to connect the fuel through the return pump outlet pipe through the return pump suction pipe, and returns to the large oil storage tank through the boiler fuel return pipe, forming a circulating preheated fuel, so that the fuel is mixed with the fuel in the large oil storage tank, and the temperature inside the fuel is gradually increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the first viewing angle of the present invention; Figure 2 It is a structural schematic diagram of the second viewing angle of the present invention; Figure 3 It is a structural schematic diagram of the present invention from a third viewing angle; Figure 4 This is a schematic diagram of the structure of the fuel oil preheating boiler in the present invention; Figure 5 It is a structural schematic diagram of the fuel oil preheating boiler in the present invention from another perspective; Figure 6 It is a side structural schematic diagram of the fuel oil preheating boiler in the present invention; Figure 7 For the present invention Figure 6 A schematic diagram of the structure from the first perspective of the aa line section; Figure 8 For the present invention Figure 6 Schematic diagram of the structure from the second perspective of the aa line section.

[0016] Among them, 1. Installation bottom plate; 2. Fuel oil preheating boiler; 201. Boiler tank; 202. Return side plate; 203. Fuel oil will be retained in the warehouse; 204. Boiler pressure relief pipe; 205. Boiler pressure relief valve; 206. Fuel oil return pump; 207. Return pump oil outlet pipe; 208. Spray gun side plate; 209. Preheating oil inlet pipe; 210. Boiler spray gun; 211. Spray gun oil inlet pipe; 212. Boiler inner partition; 213. Return pump oil extraction pipe; 214. Insulation insulation board; 215. Hot oil tank; 216. Preheating oil tank; 217. Preheating tank; 218. Corrugated pressurized pipe; 219. Connecting hole; 220. First hot oil pipeline; 221. Second hot oil pipeline; 222. Hot oil pump installation Mounting plate; 223, hot oil pump; 224, hot oil pump oil extraction pipe; 225, corrugated boiler heating pipe; 226, heating pipe air outlet; 3, boiler fuel oil return pipe; 4, large oil storage tank base; 5, large oil storage tank; 6, oil pump oil outlet pipe; 7, fuel oil sedimentation tank; 8, sedimentation tank balance pipe; 9, fuel daily tank; 10, daily tank balance pipe; 11, daily tank external adjustment connecting pipe; 12, tank body bracket; 13, tank body installation base; 14, large tank oil pump; 15, oil pump oil pipe; 16, separation pump oil inlet pipe; 17, boiler separation pump; 18, boiler combustion pipe; 19, separation pump oil outlet pipe; 20, tank body main pipe; 21, sedimentation tank lower outlet pipe; 22, daily tank lower outlet pipe. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] like Figures 1 to 3 As shown, an embodiment of the present invention provides a fuel oil preheating and mixing device for a ship, comprising a device bottom plate 1 and a fuel oil preheating boiler 2, wherein a large oil storage bin base 4 is fixedly mounted on the upper end of the device bottom plate 1, a large oil storage bin 5 is fixedly mounted on the upper end of the large oil storage bin base 4, and the fuel oil preheating boiler 2 is fixedly mounted on the upper end surface of the device bottom plate 1; a boiler fuel oil return pipe 3 is connected to the upper ends of the fuel oil preheating boiler 2 and the large oil storage bin 5, a tank body mounting base 13 is arranged on one side of the fuel oil preheating boiler 2, a tank body bracket 12 is arranged on the upper end of the tank body mounting base 13, and the tank body bracket 12 Two fuel sedimentation tanks 7 and two daily fuel tanks 9 are fixedly installed at the upper ends, a sedimentation tank balancing pipe 8 is connected to the upper end between the two fuel sedimentation tanks 7, a daily tank balancing pipe 10 is connected to the upper end between the two daily fuel tanks 9, and one end of the daily tank balancing pipe 10 is connected to the daily tank external adjustment connecting pipe 11; the lower ends of the two fuel sedimentation tanks 7 are fixedly provided with sedimentation tank lower outlet pipes 21, and the lower ends of the two daily fuel tanks 9 are fixedly provided with daily tank lower outlet pipes 22, and the lower ends of the sedimentation tank lower outlet pipe 21 and the daily tank lower outlet pipe 22 are connected to the tank body main flow pipe 20.

[0019] Thus, the lower end of the large oil storage tank 5 is connected to an oil tanker pump oil pipe 15, a large tank oil tanker pump 14 is arranged on the oil tanker pump oil pipe 15, and the output port of the large tank oil tanker pump 14 is connected to an oil tanker pump oil outlet pipe 6; the oil tanker pump oil outlet pipe 6 is fixedly connected to the sedimentation tank balance pipe 8, a separation pump oil inlet pipe 16 is connected to the main flow pipe 20 of the tank body and is located between the fuel oil sedimentation tank 7 and the daily fuel tank 9, the upper end of the separation pump oil inlet pipe 16 is connected to a boiler separation pump 17, and the output port of the boiler separation pump 17 is connected to a separation pump oil outlet pipe 19; a boiler combustion pipe 18 is connected to the main flow pipe 20 of the tank body and is located between the two daily fuel tanks 9.

[0020] In the above technical solution, the fuel in the oil storage tank 5 is pumped out by starting the tank pump 14 and enters the fuel sedimentation tank 7. During the whole preheating process, a part of the preheated fuel is separated and kept warm in the daily fuel tank 9, which is convenient for other fuel equipment to use and can provide fuel energy for the restart of the boiler. Among them, the fuel with low temperature at the lower end of the fuel sedimentation tank 7 is extracted through the separation pump oil inlet pipe 16 by the boiler separation pump 17, and is pumped into the fuel preheating boiler 2 through the separation pump oil outlet pipe 19, and the fuel with higher temperature in the fuel daily tank 9 is provided to the fuel preheating boiler 2 through the boiler combustion pipe 18, so that the fuel can be heated and returned to the large oil storage tank 5 through the boiler fuel return pipe 3. After repeated cycles, the fuel in the large oil storage tank 5 will be heated as a whole, which is convenient for ships to use in cold water.

[0021] like Figure 1 , Figures 4 to 8 As shown, the fuel oil preheating boiler 2 includes: a boiler tank body 201, a return side plate 202, a fuel oil storage bin 203, a boiler pressure relief pipe 204, a boiler pressure relief valve 205, a fuel oil return bin pump 206, a return bin pump oil outlet pipe 207, a spray gun side plate 208, a preheating oil inlet pipe 209, a boiler spray gun 210, a spray gun oil inlet pipe 211, a boiler inner partition 212, a return bin pump oil extraction pipe 213, an insulation insulation plate 214, a hot oil tank 215, a preheating oil tank 216, a connecting hole 219, and a heating pipe outlet hole 226; a return side plate 202 is fixedly installed on one side of the boiler tank body 201, and a fuel oil retention bin 203 is fixedly installed on the return side plate 202. A heating pipe air outlet 226 is provided on the boiler tank 202 and below the fuel storage bin 203; a spray gun side plate 208 is fixedly installed on the other side of the boiler tank 201, and a preheating oil inlet pipe 209 is connected to the spray gun side plate 208, a boiler spray gun 210 is fixedly installed on the outer side of the spray gun side plate 208, and a spray gun oil inlet pipe 211 is connected to one side of the boiler spray gun 210; a boiler pressure relief pipe 204 is fixedly installed on the middle upper end of the boiler tank 201, and a boiler pressure relief valve 205 is provided on the top of the boiler pressure relief pipe 204, a boiler inner partition 212 is integrally provided on the inner wall of the boiler tank 201, and a Insulating insulation board 214; the insulating insulation board 214 separates two empty compartments, the hot oil tank 215 and the preheating oil tank 216, between the boiler inner partition 212 and the spray gun side plate 208, wherein a fuel return tank pump 206 is fixedly installed on the boiler tank body 201 and located in the hot oil tank 215, the input port of the fuel return tank pump 206 is connected to a return tank pump oil suction pipe 213, the output port of the fuel return tank pump 206 is connected to a return tank pump oil outlet pipe 207, the upper end of the return tank pump oil outlet pipe 207 is fixedly connected to the boiler fuel return pipe 3, a preheating tank 217 is fixedly installed on the inner side of the boiler inner partition 212, and the inner wall of the preheating tank 217 is connected to the spray gun side plate 208 There is a corrugated pressurizing pipe 218, a corrugated boiler heating pipe 225 is arranged between the outer wall of the preheating chamber 217 and the return side plate 202, a hot oil pump mounting plate 222 is fixedly installed in the preheating chamber 217, a hot oil pump 223 is fixedly installed on the upper end of the hot oil pump mounting plate 222, and a hot oil pump extraction pipe 224 is connected to the lower end of the hot oil pump 223, a plurality of first hot oil pipelines 220 are connected to the outside of the preheating chamber 217 and located above the hot oil pump mounting plate 222, and a plurality of second hot oil pipelines 221 are connected between the inner partition plate 212 of the boiler and the return side plate 202; the first hot oil pipeline 220 and one end of the first hot oil pipeline 220 are connected to the fuel oil retention bin 203.

[0022] In the above technical solution, the fuel with a higher temperature in the fuel daily tank 9 is provided to the spray gun oil inlet pipe 211 through the boiler combustion pipe 18, and then enters the boiler spray gun 210 through the spray gun oil inlet pipe 211, and then ignites through the boiler spray gun 210, and is pressurized by the corrugated pressure pipe 218 to spray the flame into the corrugated boiler heating pipe 225, and the irregular shape of the outer end of the corrugated boiler heating pipe 225 contacts the water inside the boiler tank body 201, so that the water inside can be heated; The fuel oil is pumped into the preheating oil inlet pipe 209 connected thereto through the separation pump oil outlet pipe 19, and the fuel oil is passed to the preheating oil tank 216 through the preheating oil inlet pipe 209, and then flows into the preheating tank 217 through the connecting hole 219 opened at the lower end of the boiler inner partition 212, and the hot oil pump 223 is started to pump the fuel oil into the first hot oil pipeline 220 through the hot oil pump oil extraction pipe 224. The fuel oil is heat-conducted in the water heated to a high temperature through the first hot oil pipeline 220, and is heat-insulated and refluxed in the fuel storage bin 203, and is heat-insulated and heated again through the second hot oil pipeline 221 and returned to the hot oil tank 215. Then, the fuel oil return pump 206 is started to connect the fuel oil through the return pump oil outlet pipe 207 through the return pump oil extraction pipe 213, and return to the oil storage bin 5 through the boiler fuel oil return pipe 3, forming a circulating preheated fuel oil, which is mixed with the fuel oil in the oil storage bin 5 to gradually increase the temperature of the fuel oil.

[0023] Working principle: The present invention starts the large bunker oil pump 14 to pump out the fuel in the large oil storage bunker 5 and put it into the fuel sedimentation tank 7. In the whole preheating process, a part of the preheated fuel is separated and kept warm in the daily fuel tank 9, which is convenient for other fuel equipment to use and can provide fuel energy for the restart of the boiler. The fuel with low temperature at the lower end of the fuel settling tank 7 is extracted through the separation pump oil inlet pipe 16 by the boiler separation pump 17, and pumped into the fuel preheating boiler 2 through the separation pump oil outlet pipe 19, and the fuel with higher temperature in the fuel daily tank 9 is provided to the fuel preheating boiler 2 through the boiler combustion pipe 18, so that the fuel can be heated and returned to the large oil storage tank 5 through the boiler fuel return pipe 3. The cycle is repeated, and the fuel in the large oil storage tank 5 will be heated as a whole, which is convenient for ships to use in cold water; The fuel with a relatively high temperature in the daily fuel tank 9 is supplied to the spray gun oil inlet pipe 211 through the boiler combustion pipe 18, and then enters the boiler spray gun 210 through the spray gun oil inlet pipe 211, and then is ignited by the boiler spray gun 210, and is pressurized by the corrugated pressure pipe 218 to spray the flame into the corrugated boiler heating pipe 225, and the irregular shape of the outer end of the corrugated boiler heating pipe 225 contacts the water inside the boiler tank body 201, so that the water inside can be heated; The fuel oil is pumped into the preheating oil inlet pipe 209 connected thereto through the separation pump oil outlet pipe 19, and the fuel oil is passed to the preheating oil tank 216 through the preheating oil inlet pipe 209, and then flows into the preheating tank 217 through the connecting hole 219 opened at the lower end of the boiler inner partition 212, and the hot oil pump 223 is started to pump the fuel oil into the first hot oil pipeline 220 through the hot oil pump oil extraction pipe 224. The fuel oil is heat-conducted in the water heated to a high temperature through the first hot oil pipeline 220, and is heat-insulated and refluxed in the fuel storage bin 203, and is heat-insulated and heated again through the second hot oil pipeline 221 and returned to the hot oil tank 215. Then, the fuel oil return pump 206 is started to connect the fuel oil through the return pump oil outlet pipe 207 through the return pump oil extraction pipe 213, and return to the oil storage bin 5 through the boiler fuel oil return pipe 3, forming a circulating preheated fuel oil, which is mixed with the fuel oil in the oil storage bin 5 to gradually increase the temperature of the fuel oil.

[0024] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the protection scope of the present invention.

Claims

1. A ship fuel preheating and mixing device, comprising a device bottom plate (1) and a fuel preheating boiler (2), characterized in that: A large oil storage bin base (4) is fixedly mounted on the upper end of the device bottom plate (1), a large oil storage bin (5) is fixedly mounted on the upper end of the large oil storage bin base (4), and the fuel oil preheating boiler (2) is fixedly mounted on the upper end surface of the device bottom plate (1); The upper ends of the fuel oil preheating boiler (2) and the large oil storage tank (5) are connected to a boiler fuel oil return pipe (3).

2. A ship fuel preheating and mixing device according to claim 1, characterized in that: A tank mounting base (13) is provided on one side of the fuel oil preheating boiler (2), a tank support (12) is provided on the upper end of the tank mounting base (13), and two fuel oil settling tanks (7) and two fuel oil daily tanks (9) are respectively fixedly mounted on the upper end of the tank support (12).

3. A ship fuel preheating and mixing device according to claim 2, characterized in that: A sedimentation tank balancing pipe (8) is connected to the upper end between the two fuel sedimentation tanks (7), a daily tank balancing pipe (10) is connected to the upper end between the two daily fuel tanks (9), and one end of the daily tank balancing pipe (10) is connected to a daily tank external adjustment connection pipe (11); The lower ends of the two fuel oil sedimentation tanks (7) are fixedly provided with sedimentation tank lower outlet pipes (21), and the lower ends of the two fuel oil daily tanks (9) are fixedly provided with daily tank lower outlet pipes (22). The lower ends of the sedimentation tank lower outlet pipes (21) and daily tank lower outlet pipes (22) are connected to the tank body main flow pipe (20).

4. A ship fuel preheating and mixing device according to claim 3, characterized in that: The lower end of the large oil storage tank (5) is connected to an oil tanker pump oil pipe (15), a large tanker oil pump (14) is arranged on the oil tanker pump oil pipe (15), and the output port of the large tanker oil pump (14) is connected to an oil tanker pump oil outlet pipe (6); The oil pump outlet pipe (6) is fixedly connected to the sedimentation tank balance pipe (8).

5. A ship fuel preheating and mixing device according to claim 4, characterized in that: A separation pump oil inlet pipe (16) is connected to the main flow pipe (20) of the tank body and is located between the fuel oil sedimentation tank (7) and the fuel oil daily tank (9); the upper end of the separation pump oil inlet pipe (16) is connected to a boiler separation pump (17); and the output port of the boiler separation pump (17) is connected to a separation pump oil outlet pipe (19); A boiler combustion pipe (18) is connected to the main flow pipe (20) of the tank body and is located between the two daily fuel oil tanks (9).

6. A ship fuel preheating and mixing device according to claim 5, characterized in that: The fuel oil preheating boiler (2) comprises: a boiler tank body (201), a return side plate (202), a fuel oil storage bin (203), a boiler pressure relief pipe (204), a boiler pressure relief valve (205), a fuel oil return bin pump (206), a return bin pump oil outlet pipe (207), a spray gun side plate (208), a preheating oil inlet pipe (209), a boiler spray gun (210), a spray gun oil inlet pipe (211), a boiler inner partition (212), a return bin pump oil extraction pipe (213), a heat insulation layer plate (214), a hot oil tank (215), a preheating oil tank (216), a connection hole (219), and a heating pipe air outlet hole (226); A return side plate (202) is fixedly mounted on one side of the boiler tank (201), a fuel oil storage bin (203) is fixedly mounted on the return side plate (202), and a heating pipe air outlet hole (226) is provided on the return side plate (202) and below the fuel oil storage bin (203); A spray gun side plate (208) is fixedly mounted on the other side of the boiler tank (201), a preheating oil inlet pipe (209) is connected to the spray gun side plate (208), a boiler spray gun (210) is fixedly mounted on the outside of the spray gun side plate (208), and one side of the boiler spray gun (210) is connected to a spray gun oil inlet pipe (211); A boiler pressure relief pipe (204) is fixedly installed at the middle upper end of the boiler tank body (201), a boiler pressure relief valve (205) is arranged at the top end of the boiler pressure relief pipe (204), a boiler inner baffle (212) is integrally arranged on the inner wall of the boiler tank body (201), and a heat-insulating insulation plate (214) is arranged between the boiler inner baffle (212) and the spray gun side plate (208); The heat-insulating isolation plate (214) separates two empty chambers, namely a hot oil tank (215) and a preheating oil tank (216), between the boiler inner partition plate (212) and the spray gun side plate (208), wherein a fuel oil return pump (206) is fixedly installed on the boiler tank body (201) and located in the hot oil outlet tank (215), the input port of the fuel oil return pump (206) is connected to a return pump oil extraction pipe (213), and the output port of the fuel oil return pump (206) is connected to a return pump oil outlet pipe (207).

7. A ship fuel preheating and oil mixing device according to claim 6, characterized in that: The upper end of the oil return pipe (207) of the return pump is fixedly connected to the boiler fuel return pipe (3).

8. A ship fuel preheating and mixing device according to claim 7, characterized in that: A preheating chamber (217) is fixedly mounted on the inner side of the boiler inner partition (212); a corrugated pressurizing pipe (218) is connected between the inner wall of the preheating chamber (217) and the spray gun side plate (208); and a corrugated boiler heating pipe (225) is provided between the outer wall of the preheating chamber (217) and the return side plate (202).

9. A ship fuel preheating and mixing device according to claim 8, characterized in that: A hot oil pump mounting plate (222) is fixedly mounted in the preheating chamber (217), a hot oil pump (223) is fixedly mounted on the upper end of the hot oil pump mounting plate (222), and a hot oil pump oil extraction pipe (224) is connected to the lower end of the hot oil pump (223).

10. A ship fuel preheating and mixing device according to claim 9, characterized in that: A plurality of first hot oil pipelines (220) are connected to the outside of the preheating chamber (217) and located above the hot oil pump mounting plate (222), and a plurality of second hot oil pipelines (221) are connected between the boiler inner baffle (212) and the return side plate (202); The first hot oil pipeline (220) and one end of the first hot oil pipeline (220) are in communication with the fuel oil storage bin (203).

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