CN218330592U - Fuel supply system for marine methanol engine test bed - Google Patents
Fuel supply system for marine methanol engine test bed Download PDFInfo
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- CN218330592U CN218330592U CN202222258277.7U CN202222258277U CN218330592U CN 218330592 U CN218330592 U CN 218330592U CN 202222258277 U CN202222258277 U CN 202222258277U CN 218330592 U CN218330592 U CN 218330592U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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Abstract
The utility model discloses a marine fuel feeding system for methanol engine test bench, including the methanol tank, fuel supercharging device, pressure regulating device, water injection unit, the heat exchanger that adjusts the temperature, ventilative device sweep device and PLC controller, the methanol tank output links to each other with fuel supercharging device, pressure regulating device, water injection unit and the heat exchanger that adjusts the temperature in proper order, and two test bench return ends link to each other with methanol tank return end respectively. A backflow port A of the pressure regulating device is connected with a backflow end of the methanol tank, a double-wall pipe which is connected with the water injection unit and the temperature regulating heat exchanger is respectively connected with the ventilating device and the blowing device in a side-by-side mode, and the output end of the temperature regulating heat exchanger is respectively connected with the two test beds. The utility model discloses compact structure, convenient operation, degree of automation are high, the integration is good, can satisfy the fuel supply requirement of marine methyl alcohol intermediate speed engine and marine methyl alcohol low-speed engine simultaneously, and the commonality is good, is showing the rack test efficiency who has improved marine methyl alcohol engine.
Description
Technical Field
The utility model relates to a test device of new forms of energy engine, in particular to intermediate speed methanol engine (300 rpm is less than or equal to n and is less than or equal to 1000 rpm) and low-speed methanol engine (n is less than or equal to 300 rpm) bench test device's fuel supply system belongs to new forms of energy engine technical field.
Background
The development of methanol fuel engines is underway in various large marine engine plants around the world, striving to market marine methanol fuel engines before 2025. Currently, there is no well-established and reliable methanol fuel supply system to meet the experimental tests for marine methanol engines. Therefore, the fuel supply system for the marine methanol engine test bed is urgently needed to solve the test problem of the methanol engine, so that the debugging and the test of the low-speed methanol engine and the medium-speed methanol engine are met, and the low-carbon development of the marine engine is promoted.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a marine fuel feed system for methanol engine test bench when satisfying the low-speed methanol engine test, also can compromise the experimental research of intermediate speed methanol engine.
The utility model discloses a following technical scheme realizes:
a fuel supply system for a marine methanol engine test bed comprises a methanol tank arranged outside a marine methanol engine test bed, a fuel supercharging device, a pressure regulating device, a water injection unit, a temperature regulating heat exchanger, a ventilating device, a purging device and a PLC (programmable logic controller), wherein the water injection unit, the temperature regulating heat exchanger and the ventilating device are arranged in the marine methanol engine test bed; a reflux port A of the pressure regulating device is connected with the reflux end of the methanol tank through a single-wall pipe; the double-wall pipe connecting the water injection unit and the temperature-adjusting heat exchanger is respectively connected with a ventilating device and a blowing device, and the single-wall pipe at the output end of the temperature-adjusting heat exchanger is respectively connected with the input end of the marine low-speed methanol engine test bed and the input end of the marine medium-speed methanol engine test bed through corresponding ball valves; and a signal wire of the PLC is respectively and electrically connected with a methanol detector of a low-speed marine methanol engine test bed and a methanol detector of a medium-speed marine methanol engine, and the signal wire is also respectively and electrically connected with a temperature sensor of the temperature-regulating heat exchanger, a water injection unit, a ventilation device and a purging device.
The object of the invention is also achieved by the following technical measures.
Furthermore, the methanol tank is a normal pressure container, the capacity of the methanol tank is more than 2 times of the capacity of a fuel tank of a diesel engine with the same power, and the tank body of the methanol tank is made of 316L stainless steel.
Further, the fuel supercharging device comprises a delivery pump, a pressure pump, a heating heat exchanger and a filter, wherein the output end of the methanol tank is sequentially connected with the delivery pump, the pressure pump, the heating heat exchanger and the filter through a single-wall pipe, methanol in the methanol tank is delivered to the pressure pump through the delivery pump and pressurized to 1.4 Mpa-1.6 Mpa, then the methanol is heated to 40 ℃ -50 ℃ through the heating heat exchanger, and then the methanol is filtered through the filter until the maximum particles in the methanol are less than or equal to 10um and then the methanol is input to the input end of the pressure regulating device through the single-wall pipe.
Furthermore, the pressure regulating device comprises a first check valve, a first ball valve and a first two-way electromagnetic valve which are sequentially connected through a single-wall pipe, a second two-way electromagnetic valve is connected to the side of the single-wall pipe connected between the first check valve and the first ball valve and is connected with the return port A through the second check valve, the first two-way electromagnetic valve is connected with the inner pipe of the double-wall pipe, and the outer pipe of the double-wall pipe is connected with the ventilation port B through a third check valve; one end of the overflow valve is connected to the joint of the first two-way electromagnetic valve and the inner pipe of the double-wall pipe, and the other end of the overflow valve is connected with the reflux port A through the single-wall pipe;
furthermore, the water injection unit comprises a flow meter and a spray gun, one end of the double-wall pipe connected with the output end of the pressure regulating device penetrates through the wall of the marine methanol engine test room, one end of the water injection pipe is connected with one end of the inner pipe of the double-wall pipe sequentially through the second ball valve, the flow meter and the spray gun, and the other end of the double-wall pipe is connected with the temperature regulating heat exchanger. The water injection pressure of the water injection unit is 0.09-0.1 Mpa greater than the methanol pressure of the double-wall pipe inner pipe, and the methanol concentration is reduced by 4-5% after water injection; and a signal wire of the PLC is electrically connected with the flowmeter.
Further, the temperature-adjusting heat exchanger is used for heat exchange by inputting hot water of 85-90 ℃, so that the temperature of the methanol is increased to 68-75 ℃.
Further, the ventilating device comprises a ventilating fan and a variable frequency controller, an output air pipe of the ventilating fan is communicated with a double-wall pipe outer pipe which is connected with the water injection unit and the temperature-adjusting heat exchanger, and the output air pressure of the ventilating fan is 0.09 Mpa-0.1 Mpa; and the variable frequency controller is connected with a signal wire of the PLC.
Furthermore, the purging device comprises a nitrogen cylinder, a sixth ball valve, a third two-way electromagnetic valve and a purging fan which are sequentially connected through a single-wall pipe, wherein an output air pipe of the purging fan is communicated with the inner pipe of the double-wall pipe, and the pressure of nitrogen output by the purging fan is 0.30-0.45 Mpa; and a signal wire of the PLC is electrically connected with the third two-way electromagnetic valve.
The utility model discloses with the pressure boost of methanol fuel, the pressure regulating, the water injection, adjust the temperature, ventilative, sweep and control and security integration in an organic whole, provide the high-efficient high-quality methanol fuel feeding system of marine methanol engine rack test, compact structure, convenient operation, degree of automation is high, the integration level is good, can satisfy the fuel supply requirement of marine methanol intermediate speed engine and marine methanol low-speed engine simultaneously, the commonality is good, is showing the rack test efficiency who has improved marine methanol engine.
The advantages and features of the invention will be illustrated and explained by means of the following non-restrictive description of preferred embodiments, which are given by way of example only with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and embodiments of the present invention.
As shown in fig. 1, the utility model discloses a methanol tank 1, fuel supercharging device 2 and pressure regulating device 3 that set up outside marine methanol engine laboratory 10 to and set up water injection unit 4, temperature adjusting heat exchanger 5, the ventilative device 6 in marine methanol engine laboratory 10, sweep device 7 and PLC controller 8, methanol tank output 11 links to each other with fuel supercharging device 2 and pressure regulating device 3 through single-walled pipe 20 in proper order. The methanol tank 1 is a normal pressure container, the capacity of the methanol tank is more than 2 times of the capacity of a fuel tank of a power diesel engine, the material of the tank body of the methanol tank 1 is 316L stainless steel, cavitation erosion is prevented, and the service life of the methanol tank is prolonged.
The fuel supercharging device 2 comprises a delivery pump 21, a pressure pump 22, a temperature rise heat exchanger 23 and a filter 24 which are sequentially connected through a single-wall pipe 20, wherein the delivery pump 21 and the pressure pump 22 pressurize the methanol in the methanol tank 1 to 1.0Mpa, then the temperature is raised to 45 ℃ through the temperature rise heat exchanger 23, and then the 24 methanol is filtered through the filter until the maximum particles in the methanol are less than or equal to 10um and then the methanol is input to the input end of the pressure regulating device 3 through the single-wall pipe 20. The temperature-rising heat exchanger 23 ensures that the methanol is always in a liquid state, and avoids cavitation caused by the over-high gasification of the methanol before being sprayed into the cylinder of the marine methanol engine.
The pressure regulating device 3 comprises a first one-way valve 31, a first ball valve 32 and a first two-way solenoid valve 33 which are sequentially connected through a single-wall pipe 20, a second two-way solenoid valve 34 is connected on the single-wall pipe 20 between the first one-way valve 31 and the first ball valve 32, the second one-way valve 35 is connected with a return opening A, the first two-way solenoid valve 33 is connected with a double-wall pipe inner pipe 301, and the double-wall pipe outer pipe 302 is connected with a ventilation opening B through a third one-way valve 36. One end of the overflow valve 37 is connected to the joint of the first two-way solenoid valve 33 and the double-wall pipe inner pipe 301, the other end of the overflow valve 37 is connected with the return port A through the single-wall pipe 20, and the conveying pressure control and the return pressure regulation of the methanol are completed by setting the overflow pressure of the overflow valve 37 to be 1.4 Mpa-1.6 Mpa so as to meet the requirements of the methanol engine.
The first two-way solenoid valve 33 can perform the functions of normal shut-off and emergency shut-off of the fuel supply system, and the second two-way solenoid valve 34 can perform the function of discharging methanol back to the methanol tank 1 in time. When sudden failure occurs in the test process of the marine methanol engine, the control system gives an alarm, the PLC 8 instructs to close the first two-way electromagnetic valve 33 and open the second two-way electromagnetic valve 34, so that the fuel supply to the marine methanol engine is cut off in time, and meanwhile, the fuel in the single-wall pipe 20 is sent back to the methanol tank 1 in time, so that the safety of the marine methanol engine is ensured.
The water injection unit 4 comprises a flow meter 41 and a spray gun 42, one end of the double-wall pipe 30 connected with the output end of the pressure regulating device 3 penetrates through a wall 101 of the marine methanol engine laboratory 10, one end of the water injection pipe 44 is connected with one end of an inner pipe 301 of the double-wall pipe sequentially through a second ball valve 43, the flow meter 41 and the spray gun 42, and the other end of the double-wall pipe 301 is connected with the temperature regulating heat exchanger 5. The water injection pressure of the water injection unit 4 is 0.1Mpa greater than the methanol pressure of the double-wall pipe inner pipe 301, and the methanol concentration is reduced by 5 percent after water injection. The excessive latent heat of methanol gasification is prevented, and the air inlet temperature is prevented from being too low. The signal line 81 of the PLC controller 8 is electrically connected to the control valve of the spray gun 42 and the flow meter 41, respectively, for collecting the actual flow rate of water injection in time and controlling the amount of water sprayed from the spray gun 42. The water injection unit 4 provides fresh water with sufficient flow and pressure for the methanol/water mixing design to reduce the emission of nitrogen oxides and meet the IMO Tier III standard (the third level standard of the International maritime organization for reducing engine exhaust pollution).
The temperature-adjusting heat exchanger 5 exchanges heat by inputting hot water at 85-90 ℃, and the temperature-adjusting heat exchanger exchanges heat by inputting hot water at 85-90 ℃ to increase the temperature of the methanol to 68-75 ℃. The single-wall pipe 20 at the output end of the temperature-adjusting heat exchanger 5 is respectively connected with the input end of the marine low-speed methanol engine test bed 40 and the input end of the marine medium-speed methanol engine test bed 50 through a fourth ball valve 51 and a fifth ball valve 52. The fourth ball valve 51 or the fifth ball valve 52 is opened according to the use requirement, and the methanol/water mixed fuel with the temperature of 70 ℃ is delivered to the low-speed methanol engine for the ship or the medium-speed methanol engine for the ship for testing. The backflow end of the low-speed marine methanol engine test bed 40 and the backflow end of the medium-speed marine methanol engine test bed 50 are respectively connected with the backflow end 12 of the methanol tank through a fourth check valve 401 and a fifth check valve 501.
The signal line 81 of the PLC controller 8 is electrically connected to the low-speed marine methanol engine test stand methanol detector 402 and the medium-speed marine methanol engine methanol detector 502, respectively, and the signal line 81 is also electrically connected to the temperature sensor 53 of the temperature-controlled heat exchanger 5, respectively. When the methanol detector 402 of the low-speed marine methanol engine test bed or the methanol detector 502 of the medium-speed marine methanol engine detects fuel leakage, the control system gives an alarm, namely the PLC 8 instructs to close the first two-way electromagnetic valve 33 and open the second two-way electromagnetic valve 34, so that 3 fuels supplied to the marine methanol engine are cut off in time, and meanwhile, the fuels in the single-wall pipe 20 are returned to the methanol tank 1, so that the safety of the marine methanol engine under test is ensured. When the fuel temperature detected by the temperature sensor 53 of the temperature-adjusting heat exchanger 5 is not within the allowable range, the control system gives an alarm, and the fourth ball valve 51 or the fifth ball valve 52 must be closed in time to stop the fuel delivery to the low-speed marine methanol engine test stand 40 or the medium-speed marine methanol engine 50.
The ventilating device 6 comprises a ventilating fan 61 and a frequency conversion controller 62, an output air pipe 611 of the ventilating fan is communicated with a double-wall pipe outer pipe 301 which is connected with the water injection unit 4 and the temperature-adjusting heat exchanger 5, and the output air pressure of the ventilating fan 61 is 0.1Mpa; the variable frequency controller 62 is connected with a signal wire 81 of the PLC controller. During the test period of the marine low-speed methanol engine or the marine medium-speed methanol engine, air is supplied to the double-wall pipe outer pipe 302 in positive pressure through the ventilating fan 61 until the air is discharged into the atmosphere from the ventilating port B.
The purging device 7 comprises a nitrogen cylinder 71, a sixth ball valve 72, a third two-way electromagnetic valve 73 and a purging fan 74 which are sequentially connected through the single-wall pipe 20, an output air pipe 741 of the purging fan is communicated with the inner pipe 301 of the double-wall pipe, and the pressure of nitrogen output by the purging fan 74 is 0.30-0.45 Mpa. When leakage occurs in the test process of the marine methanol engine and the marine methanol engine is started and stopped, the third two-way electromagnetic valve 73 is opened through an instruction of the PLC 8, the nitrogen in the nitrogen cylinder 71 is discharged from the residual methanol in the double-wall pipe inner pipe 302 through the return opening A of the pressure regulating device 3 through the purging fan 74 through the exhaust pipe 12 at the top of the methanol tank 1, and the safe operation of the marine methanol engine on the test bed is ensured.
In addition to the above embodiments, the present invention can also have other embodiments, and all technical solutions formed by equivalent replacement or equivalent transformation are all within the protection scope required by the present invention.
Claims (9)
1. A fuel supply system for a marine methanol engine test bed is characterized by comprising a methanol tank, a fuel supercharging device, a pressure regulating device, a water injection unit, a temperature regulating heat exchanger, a ventilating device, a blowing device and a PLC (programmable logic controller), wherein the methanol tank is arranged outside the marine methanol engine test bed; the reflux port A of the pressure regulating device is connected with the reflux end of the methanol tank through a single-wall pipe; the double-wall pipe connecting the water injection unit and the temperature-adjusting heat exchanger is respectively connected with a ventilation device and a blowing device, and the single-wall pipe at the output end of the temperature-adjusting heat exchanger is respectively connected with the input end of a marine low-speed methanol engine test bed and the input end of a marine medium-speed methanol engine test bed through corresponding ball valves; and a signal wire of the PLC is respectively and electrically connected with a methanol detector of a low-speed marine methanol engine test bed and a methanol detector of a medium-speed marine methanol engine, and the signal wire is also respectively and electrically connected with a temperature sensor of the temperature-regulating heat exchanger, a water injection unit, a ventilation device and a purging device.
2. The fuel supply system for a marine methanol engine test stand according to claim 1, wherein the methanol tank is a normal pressure vessel, a capacity of the methanol tank is 2 times or more a capacity of a fuel tank of the same power diesel engine, and a tank body material of the methanol tank is 316L stainless steel.
3. The fuel supply system for the marine methanol engine test bed according to claim 1, wherein the fuel pressurizing device comprises a delivery pump, a pressure pump, a temperature rising heat exchanger and a filter, the output end of the methanol tank is sequentially connected with the delivery pump, the pressure pump, the temperature rising heat exchanger and the filter through a single-wall pipe, methanol in the methanol tank is delivered to the pressure pump through the delivery pump, pressurized to 1.4 Mpa-1.6 Mpa, heated to 40 ℃ -50 ℃ through the temperature rising heat exchanger, filtered through the filter until the maximum particles in the methanol are less than or equal to 10um, and then input to the input end of the pressure regulating device through the single-wall pipe.
4. The fuel supply system for the marine methanol engine test stand according to claim 1, wherein the pressure adjusting means comprises a first check valve, a first ball valve and a first two-way solenoid valve which are connected in sequence through a single-walled pipe, a second two-way solenoid valve is connected to a side of the single-walled pipe connecting the first check valve and the first ball valve, and is connected to the return port a through the second check valve, the first two-way solenoid valve is connected to the inner pipe of the double-walled pipe, and the outer pipe of the double-walled pipe is connected to the vent port B through a third check valve; one end of the overflow valve is connected with the joint of the first two-way electromagnetic valve and the inner pipe of the first double-wall pipe in a side-by-side mode, and the other end of the overflow valve is connected with the reflux port A through the single-wall pipe.
5. The fuel supply system for the marine methanol engine test stand according to claim 1, wherein the water injection unit comprises a flow meter and a spray gun, one end of the double-walled pipe connected to the output end of the pressure regulating device passes through a wall of the marine methanol engine test room, one end of the water injection pipe is connected to one end of the inner pipe of the double-walled pipe sequentially through the second ball valve, the flow meter and the spray gun, and the other end of the double-walled pipe is connected to the temperature regulating heat exchanger.
6. The fuel supply system for the marine methanol engine test bed according to claim 5, wherein the water injection pressure of the water injection unit is greater than the methanol pressure of the double-walled pipe inner pipe by 0.09Mpa to 0.1Mpa, and the methanol concentration after water injection is reduced by 4% to 5%; and a signal wire of the PLC is electrically connected with the flowmeter.
7. The fuel supply system for the marine methanol engine test stand according to claim 1, wherein the temperature-adjusting heat exchanger increases the temperature of methanol to 68 ℃ to 75 ℃ by heat exchange with hot water of 85 ℃ to 90 ℃.
8. The fuel supply system for the marine methanol engine test bed according to claim 1, wherein the ventilating device comprises a ventilating fan and a variable frequency controller, an output air pipe of the ventilating fan is communicated with an outer pipe of a double-wall pipe connecting the water injection unit and the temperature-adjusting heat exchanger, and the output air pressure of the ventilating fan is 0.09 Mpa-0.1 Mpa; and the frequency conversion controller is connected with a signal wire of the PLC.
9. The fuel supply system for the marine methanol engine test bed according to claim 1, wherein the purging device comprises a nitrogen cylinder, a sixth ball valve, a third two-way solenoid valve and a purging fan which are sequentially connected through a single-wall pipe, an output air pipe of the purging fan is communicated with an inner pipe of the double-wall pipe, and the pressure of the output nitrogen of the purging fan is 0.30 Mpa-0.45 Mpa; and a signal wire of the PLC is electrically connected with the third two-way electromagnetic valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222258277.7U CN218330592U (en) | 2022-08-26 | 2022-08-26 | Fuel supply system for marine methanol engine test bed |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222258277.7U CN218330592U (en) | 2022-08-26 | 2022-08-26 | Fuel supply system for marine methanol engine test bed |
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| CN218330592U true CN218330592U (en) | 2023-01-17 |
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| CN202222258277.7U Active CN218330592U (en) | 2022-08-26 | 2022-08-26 | Fuel supply system for marine methanol engine test bed |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117588340A (en) * | 2024-01-18 | 2024-02-23 | 威海中远海运重工科技有限公司 | Principle prototype of methanol fuel supply system and testing method thereof |
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2022
- 2022-08-26 CN CN202222258277.7U patent/CN218330592U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117588340A (en) * | 2024-01-18 | 2024-02-23 | 威海中远海运重工科技有限公司 | Principle prototype of methanol fuel supply system and testing method thereof |
| CN117588340B (en) * | 2024-01-18 | 2024-05-03 | 威海中远海运重工科技有限公司 | Principle prototype of methanol fuel supply system and testing method thereof |
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