Air-cooled methanol fuel supply system with closed structure

Abstract

The invention discloses an air-cooled methanol fuel supply system with a closed structure, and relates to the technical field of marine methanol fuel supply. The device consists of a closed structure, an air-cooled heat exchange surface, an atomizing nozzle, a cooling medium control valve, a temperature sensor, a fan, a methanol gas detector, a liquid level switch and a methanol pump. According to the system, the whole fuel supply system is enclosed and shielded through a closed structure, and temperature-controllable air is introduced by a fan to pass through an air-cooled heat exchange surface so as to effectively cool methanol after being pumped by a methanol pump. The temperature sensor monitors the temperature of the air inlet, the cooling medium control valve adjusts the flow of the atomizing nozzle, and accurate temperature control is achieved. And the air-cooling heat exchange surface adopts an innovative airflow design, so that the air flow is increased, and the heat exchange efficiency is enhanced. The methanol gas detector and the liquid level switch can rapidly detect leakage, methanol gas is discharged to a safe position through mechanical ventilation, liquid methanol is collected, and pollution to a cooling medium system is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of marine methanol fuel supply, in particular to a closed structure air-cooled methanol fuel supply system. Background Art

[0002] In recent years, the International Maritime Organization has continuously strengthened its requirements on carbon emissions. Methanol has received widespread attention as a backup clean energy source and has gradually been introduced to the market as a shipping fuel. The methanol fuel supply system has developed rapidly as an important system component technology route.

[0003] There are many solutions for cooling methanol after the methanol pump in the methanol supply system, such as the solution of heat exchange between the independent heat source on board and methanol. An additional cooling system is added to absorb the heat transferred to the methanol by the methanol pump. The system control is complex, occupies more space, and it is difficult to detect leaks in the heat exchanger. Therefore, a structure that does not require an additional cooling system is needed to achieve methanol temperature control. In addition, traditional cooling methods usually rely on simple air cooling and lack optimized airflow paths and temperature control methods, resulting in the methanol not being effectively cooled after the pump, affecting fuel performance and even damaging the system due to overheating. Summary of the invention

[0004] In order to overcome the defects of the above-mentioned prior art, the problem to be solved by the present invention is to use the mechanical ventilation system for preventing methanol vapor accumulation to control the methanol temperature, simplify the fuel supply system, and avoid leakage from polluting the cooling medium system. The technical solution adopted by the present invention is a closed structure air-cooled methanol fuel supply system, which consists of a closed structure, an air-cooled heat exchange surface, an atomizing nozzle, a cooling medium control valve, a temperature sensor, a blower, a methanol gas detector, a liquid level switch, and a methanol pump; the entire methanol fuel supply system is enclosed in the closed structure, and air is passed through the air-cooled heat exchange surface, wherein the air-cooled heat exchange surface is located on the pipeline behind the methanol pump; the closed structure is used The fan is used for ventilation, and a temperature sensor and atomizing nozzle are installed at the ventilation inlet. The temperature sensor monitors the ventilation temperature of the air inlet, and controls the atomizing flow rate through the cooling medium control valve to adjust the air temperature at the air inlet; a methanol gas detector is installed at the air outlet, and a liquid level switch is installed at the low point of the closed structure to detect the leakage of methanol gas and liquid. The entire fuel supply system is enclosed by a closed structure, and the fan is used to extract the temperature-controlled air inlet wind to cool the methanol after the methanol pump through air-cooled heat exchange; the air temperature at the air inlet is monitored by a temperature sensor, and the cooling medium control valve is controlled to adjust the flow rate through the atomizing nozzle to achieve control of the inlet air temperature. The selection of cooling medium should not cause damage to valves and accessories. When a leak occurs in the methanol supply system, it will be quickly detected by the methanol gas detector and the liquid level switch, and the methanol gas will be discharged to a safe location through mechanical ventilation, and the methanol liquid will be collected through the device, and will not cause pollution to the cooling medium system.

[0005] Preferably, the air-cooled heat exchange surface includes a pneumatic negative pressure cylinder, on the outer circumferential surface of which an air inlet cylinder is fixed along its own radial direction, the air inlet cylinder and the interior of the pneumatic negative pressure cylinder are connected, and a paint opening is provided at one end of the pneumatic negative pressure cylinder, and an intermediate collector cylinder is fixed to the outer circle of the end face of the paint opening through a first connecting rod, and the end face of the intermediate collector cylinder is fixed to the end face of the intermediate collector cylinder through a second connecting rod.

[0006] Preferably, a driving motor is fixed to the inner wall of the air intake cylinder, a gap for air circulation is provided between the outer shell of the driving motor and the inner wall of the air intake cylinder, and a driving air impeller is fixed to the output shaft of the driving motor.

[0007] Preferably, heat exchange plates are sleeved on the outer surfaces of the pneumatic negative pressure cylinder, the middle collector cylinder and the terminal collector cylinder, wherein the heat exchange plates are composed of a plurality of hollow plates arranged in a circular equidistant array.

[0008] Preferably, a drainage cone block is provided on the side of one end of the terminal confluence tube away from the pneumatic negative pressure tube, and the drainage cone block is fixedly matched with all the heat exchange plates. The drainage cone block is used to guide the air discharged from the terminal confluence tube to blow toward the heat exchange plates.

[0009] Preferably, a guide cover is fixed on the heat exchange plate, and the guide cover is arranged on the outside of the guide cone block to prevent the air from flowing outside the heat exchange plate and make the air flow in one direction. A shielding disk fixed to all the heat exchange plates is also fixed on the guide cone block. Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention uses a closed structure to enclose the entire methanol fuel supply system to prevent methanol leakage from polluting the environment. When leakage occurs, the methanol gas detector and the liquid level switch can quickly detect it, and the methanol gas is discharged to a safe location through mechanical ventilation. The liquid methanol is effectively collected to ensure that the cooling medium system is not polluted; (2) The present invention monitors the temperature of the air inlet through a temperature sensor and uses a cooling medium control valve to adjust the flow of the atomizing nozzle to achieve precise control of the inlet air temperature. The fan introduces temperature-controlled air into the air-cooled heat exchange surface to effectively cool the methanol after the methanol pump. This precise temperature management improves the efficiency and reliability of fuel supply, ensures that methanol works at the optimal temperature, and improves the overall performance of the system; (3) The air-cooled heat exchange surface of the present invention adopts a combination design of a pneumatic negative pressure cylinder, an air inlet cylinder, a driving air impeller and a heat exchange plate to form an efficient airflow path. The airflow enters from multiple paths through the pressure difference, which increases the air flow and enhances the cooling effect on the heat exchange plate. The design of the guide cone block and the guide cover ensures one-way air flow, prevents hot air from flowing back, and improves heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1It is a schematic diagram of the structure of the methanol fuel supply system of the present invention.

[0011] Figure 2 It is a schematic diagram of the overall structure of the air-cooled heat exchange surface of the present invention.

[0012] Figure 3 It is a schematic diagram of the internal structure of the heat exchange plate of the present invention.

[0013] Figure 4 It is a schematic diagram of the structure of the pneumatic negative pressure cylinder of the present invention.

[0014] Figure 5 It is a schematic diagram of the overall structure of the heat exchanger plate of the present invention.

[0015] In the figure: 1-closed structure; 2-air-cooled heat exchange surface; 201-pneumatic negative pressure cylinder; 202-air inlet cylinder; 203-driving air impeller; 204-driving motor; 205-intermediate collector cylinder; 206-end collector cylinder; 207-second connecting rod; 208-first connecting rod; 209-air inlet window; 210-painting opening; 211-heat exchange plate; 212-shielding disc; 213-drainage hood; 214-drainage cone block; 3-atomizing nozzle; 4-cooling medium control valve; 5-temperature sensor; 6-fan; 7-methanol gas detector; 8-liquid level switch; 9-methanol pump. DETAILED DESCRIPTION

[0016] The following is combined with Figure 1-Figure 5 , and further illustrate the technical solution of the present invention through specific implementation methods.

[0017] The present invention provides a closed structure air-cooled methanol fuel supply system, which is composed of a closed structure 1, an air-cooled heat exchange surface 2, an atomizing nozzle 3, a cooling medium control valve 4, a temperature sensor 5, a fan 6, a methanol gas detector 7, a liquid level switch 8, and a methanol pump 9; the closed structure 1 encloses the entire methanol fuel supply system and allows air to pass through the air-cooled heat exchange surface 2, wherein the air-cooled heat exchange surface 2 is located on a pipeline behind the methanol pump 9; the closed structure 1 uses a fan 6 for ventilation, and a temperature sensor 5 and an atomizing nozzle 3 are installed at the ventilation inlet thereof, and the temperature sensor 5 monitors the ventilation temperature at the air inlet The temperature of the air at the air inlet is adjusted by controlling the atomization flow rate through the cooling medium control valve 4; a methanol gas detector 7 is installed at the air outlet, and a liquid level switch 8 is installed at the low point of the closed structure 1 to detect the leakage of methanol gas and liquid. The entire fuel supply system is enclosed by the closed structure 1, and the temperature-controlled air inlet wind is extracted by the fan 6 to cool the methanol after the methanol pump 9 through the air-cooled heat exchange surface 2; the air temperature at the air inlet is monitored by the temperature sensor 5, and the cooling medium control valve 4 is controlled to adjust the flow rate through the atomizing nozzle 3 to achieve the control of the inlet air temperature. The selection of cooling medium should not cause damage to the valve and accessories. When the methanol supply system leaks, it will be quickly detected by the methanol gas detector 7 and the liquid level switch 8, the methanol gas will be discharged to a safe location through mechanical ventilation, and the methanol liquid will be collected through the device, and will not cause pollution to the cooling medium system.

[0018] The air-cooled heat exchange surface 2 includes a pneumatic negative pressure cylinder 201, on the outer circumferential surface of the pneumatic negative pressure cylinder 201, an air inlet cylinder 202 is fixed along its own radial direction, the air inlet cylinder 202 is connected to the inside of the pneumatic negative pressure cylinder 201, and one end of the pneumatic negative pressure cylinder 201 is provided with a paint spraying opening 210, the outer ring of the end surface of the paint spraying opening 210 is fixed with an intermediate collector cylinder 205 overhead through a first connecting rod 208, and the end surface of the intermediate collector cylinder 205 is fixed with a terminal collector cylinder 206 overhead through a second connecting rod 207. A driving motor 204 is fixed to the inner wall of the air inlet cylinder 202, and a gap is provided between the outer shell of the driving motor 204 and the inner wall of the air inlet cylinder 202 for air circulation, and a driving air impeller 203 is fixed to the output shaft of the driving motor 204. Heat exchange fins 211 are sleeved on the outer surfaces of the pneumatic negative pressure cylinder 201, the middle confluence cylinder 205, and the terminal confluence cylinder 206, wherein the heat exchange fins 211 are composed of a plurality of hollow paddles arranged in a circular equidistant array. A drainage cone block 214 is arranged on the side of the terminal confluence cylinder 206 away from one end of the pneumatic negative pressure cylinder 201. The drainage cone block 214 is fixedly matched with all the heat exchange fins 211, and the drainage cone block 214 is used to guide the air discharged from the terminal confluence cylinder 206 to blow toward the heat exchange fins 211. A drainage cover 213 is also fixed on the heat exchange fins 211, and the drainage cover 213 is arranged on the outside of the drainage cone block 214, which is used to prevent the air from flowing outside the heat exchange fins 211 and make the air flow in one direction. A shielding disc 212 fixed to all the heat exchange fins 211 is also fixed on the drainage cone block 214.

[0019] Start the drive motor 204, and the output shaft of the drive motor 204 drives the drive impeller 203 to rotate. The drive impeller 203 drives the external air to enter the air inlet cylinder 202. Because the air inlet cylinder 202 is connected to the inside of the pneumatic negative pressure cylinder 201, the air will also enter the pneumatic negative pressure cylinder 201, and then be discharged through the paint spraying opening 210. The air coming out of the paint spraying opening 210 will flow into the middle confluence cylinder 205 at a high speed. Since the air blown out of the paint spraying opening 210 is cylindrical, the pressure in the middle position of the cylinder will be in a negative pressure state. At this time, the external air will also enter the axial position of the pneumatic negative pressure cylinder 201 through the air inlet window 209, and then merge with the air blown out from the paint spraying opening 210, so as to obtain more air flow. Similarly, the air outside the middle collector tube 205 will also enter the middle collector tube 205 through the gap between the paint spraying opening 210 and the middle collector tube 205. This is because the pressure at the location where the air flows is low, and the external air is almost still relative to the air between the middle collector tube 205 and the paint spraying opening 210. Therefore, under the action of the pressure difference, the external air will enter the middle collector tube 205; similarly, the air outside between the middle collector tube 205 and the end collector tube 206 will also enter through the gap between the middle collector tube 205 and the end collector tube 206. The air flows into the terminal manifold 206 and then flows toward the guide cone block 214. Under the guidance of the guide cone block 214, the airflow blows the heat exchange plate 211 on the outside of the guide cone block 214, and then dissipates the heat of the heat exchange plate 211. Since the heat exchange plate 211 also covers the outside of the intermediate manifold 205 and the terminal manifold 206, the air entering the gap between the spray opening 210 and the intermediate manifold 205 and the air entering the gap between the intermediate manifold 205 and the terminal manifold 206 will also pass through the heat exchange plate 211, thereby dissipating the heat of the heat exchange plate 211. It should be noted that the guide cover 213 is used to discharge the air guided out of the guide cone block 214 in a direction away from the pneumatic negative pressure cylinder 201, and prevent the discharged hot airflow from converging into the intermediate manifold 205 and the terminal manifold 206. In this way, the air can pass through the air-cooled heat exchange surface 2 as much as possible, ensuring a better cooling effect. The cooling medium should be selected to achieve good cooling of the air without causing damage to the valves and accessories of the fuel supply system.

Claims

1. A closed structure air-cooled methanol fuel supply system, characterized in that: It is composed of a closed structure (1), an air-cooled heat exchange surface (2), an atomizing nozzle (3), a cooling medium control valve (4), a temperature sensor (5), a fan (6), a methanol gas detector (7), a liquid level switch (8), and a methanol pump (9); The closed structure (1) encloses the entire methanol fuel supply system and allows air to pass through the air-cooled heat exchange surface (2), wherein the air-cooled heat exchange surface (2) is located on the pipeline after the methanol pump (9); A fan (6) is used for ventilation in the closed structure (1), and a temperature sensor (5) and an atomizing nozzle (3) are installed at the ventilation inlet. The temperature sensor (5) monitors the ventilation temperature of the air inlet and controls the atomizing flow rate through the cooling medium control valve (4) to adjust the air temperature at the air inlet.

2. A closed structure air-cooled methanol fuel supply system according to claim 1, characterized in that: A methanol gas detector (7) is installed at the air outlet, and a liquid level switch (8) is installed at the low point of the closed structure (1) to detect leakage of methanol gas and liquid.

3. A closed structure air-cooled methanol fuel supply system according to claim 2, characterized in that: The air-cooled heat exchange surface (2) comprises a pneumatic negative pressure cylinder (201), an air inlet cylinder (202) is fixed on the outer circumferential surface of the pneumatic negative pressure cylinder (201) along its own radial direction, the air inlet cylinder (202) and the interior of the pneumatic negative pressure cylinder (201) are connected, and a paint spraying opening (210) is provided at one end of the pneumatic negative pressure cylinder (201), an intermediate collector cylinder (205) is fixed in the air on the outer ring of the end surface of the paint spraying opening (210) via a first connecting rod (208), and a terminal collector cylinder (206) is fixed in the air on the end surface of the intermediate collector cylinder (205) via a second connecting rod (207).

4. A closed structure air-cooled methanol fuel supply system according to claim 3, characterized in that: A driving motor (204) is fixed to the inner wall of the air intake cylinder (202), a gap for air circulation is provided between the outer shell of the driving motor (204) and the inner wall of the air intake cylinder (202), and a driving air impeller (203) is fixed to the output shaft of the driving motor (204).

5. A closed structure air-cooled methanol fuel supply system according to claim 4, characterized in that: Heat exchange fins (211) are sleeved on the outer surfaces of the pneumatic negative pressure cylinder (201), the intermediate converging cylinder (205), and the terminal converging cylinder (206), wherein the heat exchange fins (211) are composed of a plurality of hollow paddles arranged in a circular equidistant array.

6. A closed structure air-cooled methanol fuel supply system according to claim 5, characterized in that: A drainage cone block (214) is provided on the side of one end of the terminal confluence tube (206) away from the pneumatic negative pressure tube (201), and the drainage cone block (214) is fixedly matched with all the heat exchange fins (211). The drainage cone block (214) is used to guide the air discharged from the terminal confluence tube (206) to blow toward the heat exchange fins (211).

7. A closed structure air-cooled methanol fuel supply system according to claim 6, characterized in that: A flow guide hood (213) is also fixed to the heat exchange fins (211). The flow guide hood (213) is arranged on the outside of the flow guide cone block (214) and is used to prevent cross-flow of air outside the heat exchange fins (211) so that the air flows in one direction. A shielding disc (212) fixed to all the heat exchange fins (211) is also fixed to the flow guide cone block (214).

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