CN115288894B - Methanol fuel supply system - Google Patents
Methanol fuel supply system Download PDFInfo
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- CN115288894B CN115288894B CN202210884612.6A CN202210884612A CN115288894B CN 115288894 B CN115288894 B CN 115288894B CN 202210884612 A CN202210884612 A CN 202210884612A CN 115288894 B CN115288894 B CN 115288894B
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- methanol
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- buffer tank
- engine
- fuel supply
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- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 title claims abstract description 905
- 239000000446 fuel Substances 0.000 title claims abstract description 66
- 238000010438 heat treatment Methods 0.000 claims abstract description 56
- 238000010926 purge Methods 0.000 claims abstract description 53
- 239000007789 gas Substances 0.000 claims description 39
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 15
- 238000009423 ventilation Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 abstract description 7
- 238000001914 filtration Methods 0.000 abstract description 5
- 230000000087 stabilizing effect Effects 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 8
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000002309 gasification Methods 0.000 description 3
- 239000005431 greenhouse gas Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0047—Layout or arrangement of systems for feeding fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
- F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0047—Layout or arrangement of systems for feeding fuel
- F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0047—Layout or arrangement of systems for feeding fuel
- F02M37/007—Layout or arrangement of systems for feeding fuel characterised by its use in vehicles, in stationary plants or in small engines, e.g. hand held tools
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/04—Feeding by means of driven pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
- F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
The application provides a methanol fuel supply system, which at least comprises a methanol pressurizing and heating supply module, a heat source supply unit and a purge gas supply unit, wherein the methanol pressurizing and heating supply module at least comprises a methanol pressurizing and heating supply module, a heat source supply unit and a purge gas supply unit, the methanol pressurizing and heating supply module is used for providing secondary filtration to ensure that the purity of methanol meets the requirement, a secondary buffer tank is used for stabilizing and stabilizing pressure and flow, and the secondary pressurizing and heating supply module is used for providing secondary pressurization and secondary heating to meet the pressure and temperature requirements, so that the methanol is ensured to be stably and continuously supplied, no leakage is ensured to ensure that a methanol engine runs safely, and the combustion efficiency of the engine is improved. And the purge gas in the purge gas supply unit enters the second filter and the methanol engine to purge, and residual methanol in the pipeline, the equipment and the methanol engine is reversely blown back to the methanol supply unit, so that the waste of methanol fuel is reduced, and the safety of the system is ensured. The first pressure relief valve and the second pressure relief valve are arranged to regulate the pipeline pressure of the system, and the first safety valve and the second safety valve are arranged to regulate the pressure of the buffer tank, so that the safe operation of the system is further ensured.
Description
Technical Field
The application relates to the field of fuel supply system design, in particular to a methanol fuel supply system.
Background
Since the global industrialization, petroleum, coal, natural gas and other petrochemical energy sources are rapidly developed, and become main energy sources and powerful power for the economic and social development, but the problems of environmental pollution caused by the emission of ship waste gas with petroleum products as fuel are increasingly serious while the world economy is flourished.
The IMO 72 nd offshore environmental protection committee in 4 months 13 in 2018 passed the international national marine greenhouse gas emission reduction preliminary strategy in London, UK, required to be implemented step by step, strived for 2050, the global greenhouse gas annual total emission was reduced by at least 50% compared with 2008, and efforts were made to gradually eliminate marine greenhouse gas emissions according to emission reduction paths consistent with the temperature control objective of Paris protocol. To achieve the emission goals of the marine industry, combustion efficiency of marine engines is first raised, while cleaner engine fuels are also being developed and used, generally increasing the emission levels of marine engines.
Methanol is regarded as a renewable substance and is the first clean fuel for replacing petroleum fuel, the methanol does not need to be stored in a low-temperature and pressure container, and can be stored in a similar oil product mode, so that the use cost is lower and the economy is high, and therefore, the research of a methanol fuel supply system has great significance.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present application is to provide a methanol fuel supply system, which can stably and continuously supply methanol to a methanol engine, and effectively ensure safe and reliable operation of the methanol engine when using methanol.
To achieve the above and other related objects, the present application provides a methanol fuel supply system including at least:
the methanol pressurizing and heating supply module comprises a methanol supply unit, a first filter, a pressurizing and heating unit and a second filter which are sequentially connected, wherein the pressurizing and heating unit comprises a first buffer tank, a methanol supply pump, a low-pressure heat exchanger, a second buffer tank, a methanol circulating pump and a high-pressure heat exchanger which are sequentially connected;
a heat source supply unit which communicates with the low-pressure heat exchanger and the high-pressure heat exchanger;
a purge gas supply unit in communication with the second filter;
preferably, the purge gas supply unit includes a nitrogen purge gas supply unit.
Preferably, the booster heating unit further comprises a first pressure release valve, a first pressure sensor, a first flowmeter, a second pressure release valve, a second pressure sensor and a second flowmeter, wherein the first pressure sensor and the first flowmeter are connected in series between the low-pressure heat exchanger and the second buffer tank, the second pressure sensor and the second flowmeter are connected in series between the high-pressure heat exchanger and the methanol engine, one end of the first pressure release valve is connected with the first pressure sensor, the other end of the first pressure release valve is connected with the first buffer tank, one end of the second pressure release valve is connected with the second pressure sensor, and the other end of the second pressure release valve is connected with the second buffer tank.
Preferably, the booster heating unit further comprises a first safety valve connected with the first buffer tank and a second safety valve connected with the second buffer tank, and the first safety valve and the second safety valve permeate methanol vapor to a permitted position through a gas permeation port.
Preferably, the number of the methanol supply pumps is 2, and 1 working table 1 is reserved; the number of the methanol circulating pumps is 2, and 1 working table is 1 for standby.
Preferably, the second filter is two filters connected in parallel.
The application also provides a methanol fuel supply method, which adopts the methanol fuel supply system of any one of the above, and comprises the following steps:
methanol flows out from the methanol supply unit, enters a first buffer tank through a first filter, and is buffered and preliminarily stored in the first buffer tank;
the methanol supply pump pumps out the methanol in the first buffer tank, carries out primary pressurization, and the pressurized methanol flows into the low-pressure heat exchanger to carry out primary heating, then enters the second buffer tank through the first pressure sensor and the first flowmeter, and is stabilized in pressure and current in the second buffer tank;
and the methanol circulating pump pumps out the methanol in the second buffer tank for secondary pressurization so that the methanol entering the methanol engine meets the pressure requirement, the pressurized methanol flows into the high-pressure heat exchanger for secondary heating so that the methanol entering the methanol engine meets the temperature requirement, and then flows into the methanol engine through the second pressure sensor, the second filter and the second flowmeter.
Preferably, the methanol fuel supply method further comprises a purge flow: after the system stops supplying the methanol fuel, the purge gas in the purge gas supply unit enters the second filter and the methanol engine through the purge gas interface, purges the methanol fuel supply system and the methanol engine, and reversely blows the residual methanol in the methanol engine, the pipeline or the equipment back to the methanol supply unit.
Preferably, the liquid supply flow path further comprises: when the pressure of a pipeline behind the methanol supply pump reaches a pressure set value, a first pressure release valve is automatically opened, and part of methanol flows back to the first buffer tank; and when the pipeline pressure behind the methanol circulating pump reaches a pressure set value, the second pressure release valve can be automatically opened, and part of methanol flows back to the second buffer tank.
Preferably, the liquid supply flow path further comprises: when the pressure of the first buffer tank reaches a pressure set value, the first safety valve is automatically opened, and methanol steam is permeated to an allowable position through the ventilation port; when the pressure of the second buffer tank reaches the pressure set value, the second safety valve is automatically opened, and the methanol steam is permeated to the allowed position through the ventilation port.
As described above, the methanol fuel supply system of the present application has the following advantageous effects: the methanol fuel supply system at least comprises a methanol pressurizing and heating supply module, a heat source supply unit and a purge gas supply unit, wherein the methanol pressurizing and heating supply module ensures that the purity of methanol entering a methanol engine meets the requirement through secondary filtering of the methanol, and ensures the safe operation of the methanol fuel supply system; the first buffer tank and the second buffer tank are arranged to store, stabilize and stabilize the methanol, so that the methanol fuel supply system can stabilize and continuously supply the methanol for the methanol engine; the methanol is subjected to secondary pressurization and secondary heating, so that the pressure and temperature of the methanol are stably increased, the requirement of a methanol engine on the pressure and temperature of the methanol is met, the system is ensured to be free from leakage, the methanol engine is safely operated, and the combustion efficiency of the engine is improved. After the methanol fuel supply system is stopped, the purge gas in the purge gas supply unit enters the second filter and the methanol engine through the purge gas interface to purge the methanol fuel supply system and the methanol engine, and residual methanol in the pipeline, equipment and the methanol engine is reversely blown back to the methanol supply unit, so that the waste of methanol fuel is reduced, and the safety of the system is ensured.
Further, a first pressure release valve and a second pressure release valve are arranged to adjust pipeline pressure of the methanol fuel supply system, so that the system pressure is stable and no leakage risk is guaranteed, and a first safety valve and a second safety valve are arranged to ensure that the pressure of the first buffer tank and the second buffer tank is stable and no leakage risk is guaranteed, and further the safe operation of the methanol fuel supply system is guaranteed.
Drawings
Fig. 1 is a schematic diagram of a methanol fuel supply system according to an embodiment of the application.
Description of the reference numerals
C01 Methanol inlet
C02 Methanol outlet
C03 Nitrogen interface
C04 Heating medium inlet
C05 Heating medium outlet
C06 Ventilation port
101. First filter
102. First buffer tank
103. Methanol supply pump
104. Low-pressure heat exchanger
105. First pressure sensor
106. First flowmeter
107. Second buffer tank
108. Methanol circulating pump
109. High-pressure heat exchanger
110. Second pressure sensor
111. Second filter
112. Second flowmeter
113. First pressure relief valve
114. First pressure relief valve
115. First safety valve
116. Second safety valve
Detailed Description
Other advantages and effects of the present application will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present application with reference to specific examples. The application may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present application.
As described in detail in the embodiments of the present application, the cross-sectional view of the device structure is not partially enlarged to a general scale for convenience of explanation, and the schematic drawings are only examples, which should not limit the scope of the present application. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.
It should be noted that, the illustrations provided in the present embodiment merely illustrate the basic concept of the present application by way of illustration, and only the components related to the present application are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of each component in actual implementation may be changed at will, and the layout of the components may be more complex.
As shown in fig. 1, the present application provides a methanol fuel supply system, which at least includes:
a methanol booster heating supply module, which comprises a methanol supply unit (not shown), a first filter 101, a booster heating unit and a second filter 111 which are sequentially connected, wherein the booster heating unit comprises a first buffer tank 102, a methanol supply pump 103, a low-pressure heat exchanger 104, a second buffer tank 107, a methanol circulation pump 108 and a high-pressure heat exchanger 109 which are sequentially connected;
a heat source supply unit that communicates with the low-pressure heat exchanger 104 and the high-pressure heat exchanger 109;
a purge gas supply unit communicating with the second filter 111;
specifically, the methanol supply unit may be a methanol daily cabinet or a methanol storage bin, or may be a combination of the methanol daily cabinet and the methanol storage bin, which is specifically set according to actual requirements, and is not limited herein. Methanol flows out from the methanol supply unit, enters the first filter 101 through the methanol inlet C01, and the first filter 101 filters the methanol entering the system, so that no impurities such as solid particles enter the system, the pipeline of the system equipment is protected from being blocked, and the purity of the methanol is improved.
The filtered methanol is buffered and preliminarily stored in the first buffer tank 102 of the booster heating unit, and can be stably and continuously fed into the methanol supply pump 103. Methanol is toxic, low in flash point, inflammable and explosive, zero leakage needs to be guaranteed, so that pressurizing and grading of the methanol are carried out, the methanol supply pump 103 is used for primary pressurizing, the methanol pressure is pressurized to 6bar, and the methanol pressure is stably increased to ensure that the system pressure is stable and leakage is avoided. The low-pressure heat exchanger 104 is used for heating the methanol after the methanol supply pump 103 at one stage, and stably heating the methanol to prevent the methanol from gasifying and ensure the pressure stability of the system. Further, the primarily heated methanol is stabilized and stabilized in the second buffer tank 107, and then is continuously and stably introduced into the methanol circulation pump 108. The methanol circulation pump 108 performs two-stage pressurization to pressurize the methanol to 13bar to meet the methanol pressure requirement of the methanol engine. The high-pressure heat exchanger 109 heats the methanol after the methanol circulating pump 108 in a second stage to meet the requirement of the methanol engine on the methanol temperature. Because the methanol has high gasification latent heat, a large amount of heat is required to be absorbed for gasification, and the secondary heating of the methanol can improve the starting performance of the methanol engine, reduce the absorption of heat during the gasification of the methanol, improve the heat output after combustion and improve the combustion efficiency of the methanol engine. The second filter 111 further filters the methanol after the second heating to ensure that the methanol entering the methanol engine meets the purity requirement, and then enters the methanol engine through the methanol outlet C03.
The heat source supply unit is communicated with the low-pressure heat exchanger 104 and the high-pressure heat exchanger 109 through a heating medium inlet C04, provides high-temperature heating medium for the low-pressure heat exchanger 104 and the high-pressure heat exchanger 109, recovers the heating medium after heat exchange in the low-pressure heat exchanger 104 and the high-pressure heat exchanger 109 through a heating medium outlet C05, and carries out heat exchange circulation again after heating. In this embodiment, the heat source supply unit is a water glycol system, the heating medium is water glycol, and the water glycol system has excellent flame resistance and low-temperature fluidity, and is suitable for an environment close to a fire source and having a fire hazard, and the water glycol is heated by heating or heat exchanging to provide a heat source for the low-pressure heat exchanger 104 and the high-pressure heat exchanger 109, and the low-pressure heat exchanger 104 and the high-pressure heat exchanger 109 share one set of heat source supply unit.
The purge gas supply unit is communicated with the second filter 111 through a purge gas interface, after the system stops the supply of the methanol fuel, the purge gas in the purge gas supply unit enters the methanol fuel supply system for purging through the purge gas interface and the second filter 111, and residual methanol in a pipeline and equipment is blown back to the methanol supply unit in the opposite direction, so that no methanol residue in the system is ensured. Preferably, the purge gas supply unit is also communicated with the methanol engine through a purge gas interface, and the residual methanol in the methanol engine is purged to the methanol supply unit in the opposite direction. In this embodiment, the purge gas supply unit is a nitrogen purge gas supply unit, the purge gas is nitrogen, and the purge gas interface is a nitrogen interface C03. After purging, the methanol inlet C01, the methanol outlet C02 and the nitrogen interface C03 are closed, nitrogen can be sealed in a pipeline, equipment and a methanol engine, and air is prevented from entering, so that the methanol fuel supply system can be directly used without carrying out pipeline system inerting treatment in advance.
The methanol fuel supply system can provide two-stage filtration to ensure that the purity of the methanol entering the methanol engine meets the requirement and ensure the safe operation of the methanol fuel supply system; the first buffer tank and the second buffer tank are provided for storing, stabilizing and stabilizing the methanol, so that the methanol fuel supply system can stabilize the flow and continuously supply the methanol for the methanol engine; providing two-stage supercharging to meet the pressure requirement of the methanol engine, and stably increasing the methanol pressure to ensure the pressure stability of the system and ensure zero leakage of methanol; providing secondary heating to meet the requirement of the methanol engine on the methanol temperature, stably heating the methanol to prevent the methanol from gasifying, ensuring the pressure stability of the system, ensuring the safe operation of the methanol fuel supply system and improving the combustion efficiency of the engine; methanol is poisonous, flammable and explosive, methanol in the system needs to be collected when the system stops working, the purging gas of the purging gas supply unit is utilized to purge the methanol fuel supply system and the methanol engine, no methanol residue is ensured in the system and the methanol engine, and the waste of methanol fuel is reduced while the safety is ensured.
As an example, the booster heating unit further includes a first pressure release valve 113, a first pressure sensor 105, a first flowmeter 106, a second pressure release valve 114, a second pressure sensor 110, and a second flowmeter 112, where the first pressure sensor 105 and the first flowmeter 106 are connected in series between the low pressure heat exchanger 104 and the second buffer tank 107, the second pressure sensor 110 and the second flowmeter 112 are connected in series between the high pressure heat exchanger 109 and the methanol engine, one end of the first pressure release valve 113 is connected to the first pressure sensor 105, the other end is connected to the first buffer tank 102, and one end of the second pressure release valve 114 is connected to the second pressure sensor 110, and the other end is connected to the second buffer tank 107.
Specifically, as shown in fig. 1, in this embodiment, the booster heating unit further includes the first pressure release valve 113, the first pressure sensor 105, the first flowmeter 106, the second pressure release valve 114, the second pressure sensor 110, and the second flowmeter 112, where the first pressure release valve 113 and the second pressure release valve 114 are pressure control valves, and when the pressure reaches a set value, the first pressure release valve 113 and the second pressure release valve 114 are automatically opened. One end of the first pressure release valve 113 is connected with the first pressure sensor 105, and the other end of the first pressure release valve 113 is connected with the first buffer tank 102, when the pipeline pressure is too high to reach a set value after the methanol is supplied to the pump 103, the first pressure release valve 113 is automatically opened to reflux part of the methanol to the first buffer tank 102, so that the pipeline pressure is ensured to be stable; similarly, one end of the second pressure release valve 114 is connected to the second pressure sensor 110, and the other end is connected to the second buffer tank 107, where when the pipeline pressure after the methanol circulation pump 108 is too high and reaches a set value, the second pressure release valve 114 is automatically opened to reflux part of the methanol to the second buffer tank 107, so as to ensure the pipeline pressure to be stable.
The first pressure sensor 105 and the first flowmeter 106 are connected in series between the low-pressure heat exchanger 104 and the second buffer tank 107, so that the pressure and the flow of the methanol in the pipeline behind the methanol supply pump 103 can be monitored in real time, whether the methanol supply pump 103 works normally or not is indicated, and the pressure and the flow stability of the system are ensured. The second pressure sensor 110 and the second flowmeter 112 are connected in series between the high-pressure heat exchanger 109 and the methanol engine, and can monitor the pressure and flow conditions of the methanol in the back pipeline of the methanol circulating pump 108 in real time, so as to indicate whether the methanol circulating pump 108 works normally or not, and ensure that the pressure and flow of the methanol entering the methanol engine meet the requirements, and the engine runs normally and safely.
As an example, the booster heating unit further includes a first safety valve 115 connected to the first buffer tank 102 and a second safety valve 116 connected to the second buffer tank 107, and the first safety valve 115 and the second safety valve 116 permeate methanol vapor to a permission position through a gas permeation port C06.
Specifically, as shown in fig. 1, in this embodiment, the booster heating unit further includes a first relief valve 115 connected to the first buffer tank 102 and a second relief valve 116 connected to the second buffer tank 107, where the first relief valve 115 and the second relief valve 116 are a combination valve formed by combining a check valve and a pressure control valve. When the pressure in the first buffer tank 102 and the second buffer tank 107 is too high, the first safety valve 115 and the second safety valve 116 can be automatically opened to discharge the methanol vapor in the buffer tank to the standard allowable height through the ventilation port through the ventilation mast, but can prevent air from entering the buffer tank, so that the safety and the pressure stability of the first buffer tank 102 and the second buffer tank 107 are ensured.
As an example, the number of the methanol supply pumps 103 is 2, and 1 work 1 standby; the number of the methanol circulating pumps 108 is 2, 1 work for standby, so that the methanol fuel supply system can continuously and normally run, and the sailing safety is ensured.
As an example, the second filter 111 is two filters connected in parallel, and is used for further filtering the methanol in the system, so as to ensure that the methanol entering the methanol engine meets the purity requirement and ensure the safe operation of the engine.
The application also provides a methanol fuel supply method, which adopts the methanol fuel supply system, and comprises the steps of:
methanol flows out from the methanol supply unit, enters the first buffer tank 102 through the methanol inlet C01 and the first filter 101, and is buffered and preliminarily stored in the first buffer tank 102;
the methanol supply pump 103 pumps out the methanol in the first buffer tank 102, performs primary pressurization, and the pressurized methanol flows into the low-pressure heat exchanger 104 to perform primary heating, and then enters the second buffer tank 107 through the first pressure sensor 105 and the first flowmeter 106, and is stabilized in pressure and stable in the second buffer tank 107;
the methanol circulating pump 108 pumps out the methanol in the second buffer tank 107, performs a secondary pressurization to make the methanol entering the methanol engine meet the pressure requirement, and the pressurized methanol flows into the high-pressure heat exchanger 109 to perform a secondary heating to make the methanol entering the methanol engine meet the temperature requirement, and then flows into the methanol engine through the second pressure sensor 110, the second filter 111, the second flowmeter 112, the methanol outlet C02.
In the whole liquid supply flow, the heat source supply unit is communicated with the low-pressure heat exchanger 104 and the high-pressure heat exchanger 109 through the heating medium inlet C04 to provide high-temperature heating medium for graded heating of methanol, and meanwhile, the heating medium subjected to heat exchange in the low-pressure heat exchanger 104 and the high-pressure heat exchanger 109 is recovered to the heat source supply unit through the heating medium outlet C05 and is heated again to perform heat exchange circulation.
Further, the liquid supply flow path further includes: when the pipeline pressure reaches the pressure set value after the methanol is supplied to the pump 103, the first pressure release valve 113 is automatically opened, and part of methanol flows back to the first buffer tank 102; when the pipeline pressure reaches the pressure set value after the methanol circulating pump 108, the second pressure release valve 114 is automatically opened, and part of the methanol flows back to the second buffer tank 107.
Further, the liquid supply flow path further includes: when the pressure of the first buffer tank 102 reaches a pressure set value, the first safety valve 115 is automatically opened, and the methanol vapor is permeated to a permissible position through the ventilation port; when the pressure of the second buffer tank 107 reaches the pressure set value, the second safety valve 116 is automatically opened, and the methanol vapor is vented to the allowable position through the vent. Wherein, the allowed position refers to a standard allowed height, and methanol is discharged to the standard allowed height through the ventilation mast during aviation.
The methanol fuel supply method further comprises a purging flow: after the system stops the supply of the methanol fuel, the purge gas in the purge gas supply unit enters the second filter 111 and the methanol engine through the purge gas interface, purges the methanol fuel supply system and the methanol engine, and blows the residual methanol in the methanol engine, the pipeline or the equipment back to the methanol supply unit in the opposite direction.
In summary, the methanol fuel supply system of the application has the following beneficial effects: the methanol fuel supply system at least comprises a methanol pressurizing and heating supply module, a heat source supply unit and a purge gas supply unit, wherein the methanol pressurizing and heating supply module ensures that the purity of methanol entering a methanol engine meets the requirement through secondary filtering of the methanol, and ensures the safe operation of the methanol fuel supply system; the first buffer tank and the second buffer tank are arranged to store, stabilize and stabilize the methanol, so that the methanol fuel supply system can stabilize and continuously supply the methanol for the methanol engine; the methanol is subjected to secondary pressurization and secondary heating, so that the pressure and temperature of the methanol are stably increased, the requirement of a methanol engine on the pressure and temperature of the methanol is met, the system is ensured to be free from leakage, the methanol engine is safely operated, and the combustion efficiency of the engine is improved. After the methanol fuel supply system is stopped, the purge gas in the purge gas supply unit enters the second filter and the methanol engine through the purge gas interface to purge the methanol fuel supply system and the methanol engine, and residual methanol in the pipeline, equipment and the methanol engine is reversely blown back to the methanol supply unit, so that the waste of methanol fuel is reduced, and the safety of the system is ensured.
Further, a first pressure release valve and a second pressure release valve are arranged to adjust pipeline pressure of the methanol fuel supply system, so that the system pressure is stable and no leakage risk is guaranteed, and a first safety valve and a second safety valve are arranged to ensure that the pressure of the first buffer tank and the second buffer tank is stable and no leakage risk is guaranteed, and further the safe operation of the methanol fuel supply system is guaranteed.
The above embodiments are merely illustrative of the principles of the present application and its effectiveness, and are not intended to limit the application. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the application. Accordingly, it is intended that all equivalent modifications and variations of the application be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (9)
1. A methanol fuel supply system, characterized in that the methanol fuel supply system comprises at least:
the methanol pressurizing and heating supply module comprises a methanol supply unit, a first filter, a pressurizing and heating unit and a second filter which are sequentially connected, wherein the pressurizing and heating unit comprises a first buffer tank, a methanol supply pump, a low-pressure heat exchanger, a second buffer tank, a methanol circulating pump and a high-pressure heat exchanger which are sequentially connected;
and the heat source supply unit is communicated with the low-pressure heat exchanger and the high-pressure heat exchanger.
A purge gas supply unit in communication with the second filter;
the pressurizing and heating unit further comprises a first pressure release valve, a first pressure sensor, a first flowmeter, a second pressure release valve, a second pressure sensor and a second flowmeter, wherein the first pressure sensor and the first flowmeter are connected in series between the low-pressure heat exchanger and the second buffer tank, the second pressure sensor and the second flowmeter are connected in series between the high-pressure heat exchanger and the methanol engine, one end of the first pressure release valve is connected with the first pressure sensor, the other end of the first pressure release valve is connected with the first buffer tank, one end of the second pressure release valve is connected with the second pressure sensor, and the other end of the second pressure release valve is connected with the second buffer tank.
2. The methanol fuel supply system as in claim 1, wherein: the purge gas supply unit includes a nitrogen purge gas supply unit.
3. The methanol fuel supply system as in claim 1, wherein: the pressurizing and heating unit further comprises a first safety valve connected with the first buffer tank and a second safety valve connected with the second buffer tank, and the first safety valve and the second safety valve are used for transmitting methanol steam to an allowed position through a ventilation port.
4. The methanol fuel supply system as in claim 1, wherein: the number of the methanol supply pumps is 2, and 1 working table is 1 for standby; the number of the methanol circulating pumps is 2, and 1 working table is 1 for standby.
5. The methanol fuel supply system as in claim 1, wherein: the second filter is two filters connected in parallel.
6. A methanol fuel supply method employing the methanol fuel supply system of any one of claims 1 to 5, the method comprising a supply flow path:
methanol flows out from the methanol supply unit, enters a first buffer tank through a first filter, and is buffered and preliminarily stored in the first buffer tank;
the methanol supply pump pumps out the methanol in the first buffer tank, carries out primary pressurization, and the pressurized methanol flows into the low-pressure heat exchanger to carry out primary heating, then enters the second buffer tank through the first pressure sensor and the first flowmeter, and is stabilized in pressure and current in the second buffer tank;
and the methanol circulating pump pumps out the methanol in the second buffer tank for secondary pressurization so that the methanol entering the methanol engine meets the pressure requirement, the pressurized methanol flows into the high-pressure heat exchanger for secondary heating so that the methanol entering the methanol engine meets the temperature requirement, and then flows into the methanol engine through the second pressure sensor, the second filter and the second flowmeter.
7. The methanol fuel supply method as in claim 6, further comprising a purge flow: after the system stops supplying the methanol fuel, the purge gas in the purge gas supply unit enters the second filter and the methanol engine through the purge gas interface, purges the methanol fuel supply system and the methanol engine, and reversely blows the residual methanol in the methanol engine, the pipeline or the equipment back to the methanol supply unit.
8. The methanol fuel supply method as in claim 6, wherein the liquid supply flow path further includes: when the pressure of a pipeline behind the methanol supply pump reaches a pressure set value, a first pressure release valve is automatically opened, and part of methanol flows back to the first buffer tank; and when the pipeline pressure behind the methanol circulating pump reaches a pressure set value, the second pressure release valve can be automatically opened, and part of methanol flows back to the second buffer tank.
9. The methanol fuel supply method as in claim 6, wherein the liquid supply flow path further includes: when the pressure of the first buffer tank reaches a pressure set value, the first safety valve is automatically opened, and methanol steam is permeated to an allowable position through the ventilation port; when the pressure of the second buffer tank reaches the pressure set value, the second safety valve is automatically opened, and the methanol steam is permeated to the allowed position through the ventilation port.
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| CN202210884612.6A CN115288894B (en) | 2022-07-26 | 2022-07-26 | Methanol fuel supply system |
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| CN202210884612.6A CN115288894B (en) | 2022-07-26 | 2022-07-26 | Methanol fuel supply system |
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| CN115288894B true CN115288894B (en) | 2023-11-07 |
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| WO2023247693A1 (en) * | 2022-06-24 | 2023-12-28 | Alfa Laval Corporate Ab | Methanol fuel supply system for a marine internal combustion engine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0882251A (en) * | 1994-09-13 | 1996-03-26 | Nabco Ltd | Liquefied gas fuel supplying device |
| KR20150076484A (en) * | 2013-12-27 | 2015-07-07 | 삼성중공업 주식회사 | System for supplying fuel gas in ships |
| CN114320686A (en) * | 2022-01-07 | 2022-04-12 | 中国船舶重工集团公司第七一一研究所 | Marine methanol fuel supply system and method |
| CN114320688A (en) * | 2022-03-09 | 2022-04-12 | 中国船舶重工集团柴油机有限公司 | Marine methanol fuel supply system |
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- 2022-07-26 CN CN202210884612.6A patent/CN115288894B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0882251A (en) * | 1994-09-13 | 1996-03-26 | Nabco Ltd | Liquefied gas fuel supplying device |
| KR20150076484A (en) * | 2013-12-27 | 2015-07-07 | 삼성중공업 주식회사 | System for supplying fuel gas in ships |
| CN114320686A (en) * | 2022-01-07 | 2022-04-12 | 中国船舶重工集团公司第七一一研究所 | Marine methanol fuel supply system and method |
| CN114320688A (en) * | 2022-03-09 | 2022-04-12 | 中国船舶重工集团柴油机有限公司 | Marine methanol fuel supply system |
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