CN112031967A - Fuel supply equipment and fuel supply method for offshore platform - Google Patents
Fuel supply equipment and fuel supply method for offshore platform Download PDFInfo
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- CN112031967A CN112031967A CN202010721071.6A CN202010721071A CN112031967A CN 112031967 A CN112031967 A CN 112031967A CN 202010721071 A CN202010721071 A CN 202010721071A CN 112031967 A CN112031967 A CN 112031967A
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- 239000000446 fuel Substances 0.000 title claims abstract description 101
- 238000000034 method Methods 0.000 title claims description 15
- 239000002283 diesel fuel Substances 0.000 claims abstract description 110
- 239000010779 crude oil Substances 0.000 claims abstract description 94
- 239000000295 fuel oil Substances 0.000 claims abstract description 79
- 230000001105 regulatory effect Effects 0.000 claims abstract description 50
- 238000004140 cleaning Methods 0.000 claims abstract description 34
- 238000001914 filtration Methods 0.000 claims abstract description 12
- 239000003921 oil Substances 0.000 claims description 75
- 238000002156 mixing Methods 0.000 claims description 23
- 238000006243 chemical reaction Methods 0.000 claims description 15
- 238000010926 purge Methods 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 claims description 2
- 238000005553 drilling Methods 0.000 abstract description 3
- 238000013461 design Methods 0.000 description 8
- 230000008859 change Effects 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000008676 import Effects 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004945 emulsification Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000010705 motor oil Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000011001 backwashing Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000010892 electric spark Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
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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
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B69/00—Internal-combustion engines convertible into other combustion-engine type, not provided for in F02B11/00; Internal-combustion engines of different types characterised by constructions facilitating use of same main engine-parts in different types
- F02B69/02—Internal-combustion engines convertible into other combustion-engine type, not provided for in F02B11/00; Internal-combustion engines of different types characterised by constructions facilitating use of same main engine-parts in different types for different fuel types, other than engines indifferent to fuel consumed, e.g. convertible from light to heavy fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/04—Cleaning of, preventing corrosion or erosion in, or preventing unwanted deposits in, combustion engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/08—Safety, indicating, or supervising devices
-
- 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
- F02M31/12—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating electrically
- F02M31/125—Fuel
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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
- F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
- F02M31/20—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for cooling
-
- 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
- F02M37/04—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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
A fuel supply device for an offshore platform comprises a diesel oil pressurization module, a fuel oil pressurization module and a circulation module, wherein the diesel oil pressurization module comprises a diesel oil pressure regulating pipeline and a diesel oil pressurization pipeline which are arranged in parallel, a diesel oil pressure regulating valve group is installed on the diesel oil pressure regulating pipeline, a diesel oil pressurization pump group is installed on the diesel oil pressurization pipeline, one ends of the diesel oil pressure regulating pipeline and the diesel oil pressurization pipeline are communicated with an external diesel oil daily cabinet, and the other ends of the diesel oil pressure regulating pipeline and the diesel oil pressurization pipeline are communicated with the circulation module; the fuel pressurizing module comprises a diesel crude oil switching valve, a fuel cleaning and filtering pipeline, a fuel pressure regulating pipeline and a fuel pressurizing pipeline which are arranged in parallel, wherein the input end of the diesel crude oil switching valve is communicated with an external diesel daily cabinet and an external fuel daily cabinet through a one-way valve respectively. The equipment can supply fuel oil with appropriate temperature, pressure and viscosity conditions for the offshore drilling platform generator set, and the explosion-proof, high-automation and high-flexibility use conditions of the offshore drilling platform application environment are well met.
Description
Technical Field
The invention relates to the technical field of offshore oil supply, in particular to fuel oil supply equipment for an offshore platform and a supply method of the fuel oil supply equipment for the offshore platform.
Background
At present, a plurality of marine fuel supply units are manufactured in China, the technology is relatively mature, the marine fuel supply units integrate the functions of pressurization, heating/cooling, filtering and the like, fuel is pumped out from a daily fuel bin, and the fuel is subjected to pressurization, filtering, mixing and heating/cooling treatment to achieve the use conditions of the main and auxiliary machines of the ship; the marine fuel supply unit has the advantages of high integration level, small occupied space and switching of various fuels.
The harsh environment (flammability and explosiveness of high-concentration oil gas and corrosivity of sea wind with high salt concentration) of the offshore platform puts severe technical requirements on fuel supply equipment: the equipment and the control system are designed in an explosion-proof way, and have high corrosion resistance, high automation level, high reliability, high flexibility and the like; due to the safe and stable environment of the cabin, the marine fuel supply unit does not have the capabilities of explosion prevention, corrosion prevention, emergency treatment and the like, and the fuel supply unit is high in equipment integration level and low in equipment flexibility, so that the marine fuel supply unit cannot meet the requirement of supplying oil for an offshore platform.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art, and provides fuel oil supply equipment for an offshore platform, which can supply fuel oil with appropriate temperature, pressure and viscosity conditions to a generator set of the offshore drilling platform according to the current working condition and has high flexibility, safety and reliability.
The invention also provides a supply method of the fuel supply equipment for the offshore platform.
The technical problem to be solved by the present invention is achieved by the following technical means. The invention relates to fuel supply equipment for an offshore platform, which comprises a diesel oil pressurization module, a fuel oil pressurization module and a circulation module, wherein the diesel oil pressurization module comprises a diesel oil pressure regulating pipeline and a diesel oil pressurization pipeline which are arranged in parallel;
the fuel oil pressurizing module comprises a diesel oil crude oil switching valve, a fuel oil filtering pipeline, a fuel oil pressure regulating pipeline and a fuel oil pressurizing pipeline which are arranged in parallel, wherein a fuel oil pressure regulating valve group is installed on the fuel oil pressure regulating pipeline, and a fuel oil pressurizing pump group is installed on the fuel oil pressurizing pipeline; the input end of the diesel crude oil switching valve is respectively communicated with an external diesel daily cabinet and an external fuel daily cabinet through a one-way valve, one ends of the fuel pressure regulating pipeline and the fuel pressurizing pipeline are communicated with the output end of the diesel crude oil switching valve, the other ends of the fuel pressure regulating pipeline and the fuel pressurizing pipeline are communicated with the fuel cleaning and filtering pipeline, and the other ends of the fuel cleaning and filtering pipeline are communicated with the circulating module;
the circulation module includes circulation module 1 and circulation module 2, circulation module 1 and circulation module 2 all include the circulation pipeline, the diesel oil sled crude oil sled diverter valve, the oil mixing bucket, the fuel circulation pump package, heater group and the viscosity measurement module that connect gradually on the circulation pipeline, the input of circulation module 1 and circulation module 2's circulation pipeline all communicates with diesel oil boost module, fuel boost module, circulation module 1 and circulation module 2's circulation pipeline's output communicates with the different crude oil generator in outside respectively.
The technical problem to be solved by the invention can be further realized by the following technical scheme that for the fuel supply equipment for the offshore platform, a normal emergency switching valve is also installed at the output end of the circulating pipeline, and the switching output end of the normal emergency switching valve is communicated with the communication position of the input end of the circulating pipeline and the diesel oil pressurizing module.
The technical problem to be solved by the invention can be further realized by the following technical scheme that for the fuel supply equipment for the offshore platform, an oil return pipeline is further installed at the output end of a circulating pipeline, an oil return pressure regulating valve group, a cooler and an oil drum and oil tank conversion valve are installed on the oil return pipeline, the oil drum output end of the oil drum and oil tank conversion valve is communicated with a mixed oil drum, the oil tank output end of the oil drum and oil tank conversion valve is connected with a diesel crude oil conversion valve, the diesel oil output end of the diesel crude oil conversion valve is communicated with an external diesel oil daily cabinet, and the crude oil output end of the diesel crude oil conversion valve is communicated with the external.
The technical problem to be solved by the invention can be further realized by the following technical scheme that for the fuel oil supply equipment for the offshore platform, the heater group comprises a plurality of heaters which are connected in series or in parallel, the heaters are all connected in parallel with bypass switches, the heaters are also provided with safety valves, the inlet and the outlet of each heater are provided with a relief valve, and the inlet and the outlet pipelines of the heater group are provided with thermometers.
The technical problem to be solved by the invention can be further realized by the following technical scheme that for the fuel supply equipment for the offshore platform, the diesel oil pressure regulating valve bank and the crude oil pressure regulating valve bank are respectively composed of two pressure regulating valves connected in parallel.
The technical problem to be solved by the invention can be further realized by the following technical scheme that for the fuel oil supply equipment for the offshore platform, the diesel oil booster pump group comprises two diesel oil booster pumps which are arranged in parallel, and the crude oil booster pump group comprises two crude oil booster pumps which are arranged in parallel.
The technical problem to be solved by the invention can be further solved by adopting the following technical scheme that for the fuel supply equipment for the offshore platform, the fuel cleaning and filtering pipeline is a pipeline formed by connecting the self-cleaning filter and the bypass filter in parallel.
The technical problem to be solved by the invention can be further realized by the following technical scheme, and for the fuel supply equipment for the offshore platform, the fuel supply method for the offshore platform comprises a manual working mode, a semi-automatic working mode and a full-automatic working mode, wherein the full-automatic working mode comprises the following working modes:
(1) cold vehicle start operation mode
In a host standby state, fuel oil is supplied to the host by utilizing a mode of combined operation of a diesel oil pressurization module and a circulation module corresponding to the host, the diesel oil in a diesel oil daily cabinet is pumped by the diesel oil pressurization module pressurization pump and subjected to primary pressurization, the inlet of the circulation module is positioned at a diesel oil interface, the diesel oil passes through a fuel mixing barrel and then is subjected to secondary pressurization by a circulating pump, the diesel oil is circulated between the circulation module and the host, and the return oil of the host is cooled by a plate and then flows to the fuel mixing barrel;
(2) diesel oil automatic-to-crude oil operation mode
The main engine is started in a cold engine mode and then carries a load, the load is converted into a crude oil mode after reaching the cold engine mode, the crude oil conversion mode is the combined operation of a fuel oil pressurization module and a main engine corresponding circulation module, the diesel oil pressurization module is stopped after entering the crude oil mode, the inlet of the fuel oil pressurization module is arranged at the crude oil side, the crude oil in a crude oil daily cabinet is extracted and subjected to primary pressurization by the crude oil pressurization pump, the inlet of the fuel oil circulation module is positioned at the crude oil interface, the crude oil is subjected to secondary pressurization by a circulating pump after passing through a crude oil mixing barrel and is circulated between the circulation module and the main engine, meanwhile, the crude oil is heated by an electric heater according to the viscosity of the;
(3) diesel big cleaning mode
In the crude oil mode, the main machine normally runs under load, in the large cleaning mode, an inlet of the fuel oil pressurizing module is switched to a diesel oil side, and the fuel oil pressurizing module pressurizing pump pumps diesel oil in the diesel oil daily cabinet, passes through the circulating module and enters the main machine for consumption; the fuel flow pipeline is the same as the crude oil mode, and whether the return oil of the main engine can pass through the cooler is determined by detecting the viscosity of the fuel oil in the circulating module;
(4) diesel mini purge mode
Cleaning the circulating module by using a diesel pressurizing module, and consuming crude oil in the circulating module;
(5) normal system shutdown mode
Stopping the operation of a circulating pump in the circulating module, and stopping the pressurizing module which is operated in combination with the circulating module on the premise of not influencing the working condition of the other circulating module, wherein all valves in the circulating module and the stopped pressurizing module are restored to the initial positions;
(6) emergency mode 1
The emergency mode 1 cannot be selected in the loop module, and the jump-in is carried out only after a specific fault occurs in a certain mode; the general situation is that the circulation module and the fuel oil pressurization module are operated in a certain mode in a combined mode, the fuel oil pressurization module can enter an emergency mode 1 when a fault alarm occurs, the working condition of the emergency mode 1 is the same as that of a cold vehicle mode and a small cleaning mode, and the mode mainly ensures that a main engine supplies oil under the condition that a crude oil module has a fault;
(7) emergency mode 2
The emergency mode 2 is a jump entry when the circulation module fails, or an entry is selected on the circulation module, and the emergency mode 2 can be directly selected in any mode; the emergency mode 2 is mainly characterized in that a diesel oil pressurization module is used as the only power source for pressure building, and oil is supplied to the main engine through a large bypass in the circulation module; the inlet of the circulating module is positioned on the diesel side, the outlet valve is changed from a normal position to an emergency position, and the return oil of the main engine is cooled by a plate and then does not return to the oil mixing barrel but returns to the crude oil daily cabinet;
(8) universal automatic start-stop mode for fuel oil pressurizing module, diesel oil pressurizing module and fuel oil circulating module
The corresponding booster pump or circulating pump operates in each mode, the pump group is in a one-use one-standby state, the working pump firstly gives 30s pressure to build, if the pressure is not built, the working pump is converted into a standby pump to operate, and if the pressure is still not built after 30s, the working of the module is stopped, and a fault alarm is reported; if the pressure of the pressurizing module and the pressure of the circulating module are both established, the corresponding mode can be entered; if the pressure of the working pump is reduced to the standard after entering the mode, the pressure cannot be reestablished within 5s, the standby pump is switched to, and the standby pump still has 30s time for pressure establishment.
Compared with the prior art, the invention has the beneficial effects that:
(1) the equipment has high working flexibility, and has three working modes of manual operation, semi-automatic operation and full-automatic operation;
(2) the self-adaptive adjustment of the fuel switching speed automatically adjusts the time of the fuel switching valve according to the temperature and the viscosity state of the fuel, thereby not only ensuring the realization of the fuel switching as soon as possible, but also avoiding the occurrence of the problem of fuel emulsification blockage;
(3) the modularized structural design provides sufficient space for manual execution of parts and disassembly, maintenance and repair of parts of the equipment;
(4) the control system is simple to operate, the operation of the whole fuel supply prying block system can be realized only by pressing a plurality of buttons in a full-automatic mode, and the control system is simple, convenient and easy to operate;
(5) the safety is high: the emergency mode 1 and the emergency mode 2 are guarantee under an automatic mode, and in addition, a semi-automatic mode and a manual mode are provided, so that the reliability of the whole system is gradually improved layer by layer, and the safe and reliable operation of the fuel supply equipment for the offshore platform is guaranteed.
Drawings
FIG. 1 is a structural component diagram of the present invention;
FIG. 2 is a structural connection diagram of the present invention;
FIG. 3 is a schematic diagram of the system of the present invention;
FIG. 4 is a system schematic of the diesel boost module of the present invention;
FIG. 5 is a system schematic of the fuel pressurization module of the present invention;
FIG. 6 is a system schematic of the circulation module of the present invention;
FIG. 7 is a flowchart of the routine for the start-up mode of the cooling cycle of the present invention;
FIG. 8 is a flowchart of the process of the present invention for automatically switching from diesel to crude mode;
FIG. 9 is a flowchart of the procedure for the big diesel purge mode of the present invention;
FIG. 10 is a flowchart of the procedure for the diesel mini-purge mode of the present invention;
FIG. 11 is a flowchart of the routine for the normal system shutdown mode of the present invention;
FIG. 12 is a flowchart of the procedure of the emergency mode 1 of the present invention;
fig. 13 is a flowchart of the procedure of the emergency mode 2 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, a fuel supply apparatus for an offshore platform comprises a diesel oil pressurizing module, a fuel oil pressurizing module and circulation modules 1 and 2, wherein the diesel oil pressurizing module and the fuel oil pressurizing module are arranged on a supply side, and the circulation modules 1 and 2 are arranged on a pressurizing side;
(1) referring to fig. 4, the diesel boost module:
the domestic cabinet exit linkage diesel oil pressure boost module entry of diesel oil, module entry is through manual ball valve to duplex filter, is furnished with manometer valve and manometer on the connecting line, and duplex filter export to diesel oil booster pump group, two pumps are parallel state, and each other is redundant, and the import of pump is equipped with manual ball valve. The outlets of the two diesel booster pumps are one-way valves, the manual ball valves are connected with the outlets, the outlet pipes which are connected in parallel are communicated with instrument pipelines, the instrument pipelines are connected to a pressure gauge valve and a pressure gauge of an instrument panel, and the instrument pipelines are branched and connected to a pressure switch of the instrument panel; the pipeline after the parallel connection is respectively communicated with two paths, one path enters a pressure regulating valve group, the purpose is to achieve the pressure limiting effect, the pipeline of the pressure regulating valve group is a pipeline formed by two parallel pressure regulating valves, the pipelines are mutually standby, an inlet and an outlet of each pressure regulating valve are provided with a manual ball valve, when the pressure of the pumped oil is larger than a set value, the pressure regulating valves are opened, and the fuel oil returns to a diesel oil daily cabinet, so that the purpose of reducing the pressure is achieved, and when the pressure is recovered to be normal, the pressure regulating valves; and the other path of the pressure signal reaches the module outlet through a manual ball valve, and a pressure gauge valve, a pressure gauge and a pressure sensor are installed on an outlet pipeline.
(2) Referring to fig. 5, the fuel boost module:
the fuel oil pressurizing module is provided with two inlets which are respectively connected with a diesel oil daily cabinet and a crude oil daily cabinet, the inlets are respectively connected with a manual ball valve and then reach a pneumatic change-over valve, namely a diesel oil/crude oil change-over valve, and the two inlets of the pneumatic change-over valve are respectively provided with a one-way valve, so that cross mixed pollution of diesel oil and crude oil is prevented; the outlet of the valve is connected to the duplex filter, and the pipeline of the valve is provided with a pressure gauge valve and a pressure gauge. The outlet of the duplex filter is connected to a crude oil booster pump group, the two pumps are in a parallel state and are mutually redundant, the inlet of each pump is provided with a manual ball valve, the outlets of the two diesel oil booster pumps are one-way valves and then connected with the manual ball valves, the outlet pipes after parallel connection are communicated with instrument pipelines and connected to a pressure gauge valve and a pressure gauge of an instrument panel, and the instrument pipelines are branched and connected to a pressure switch of the instrument panel; the pipeline after parallel connection is changed into two paths from a tee joint, one path is connected to a pressure regulating valve group by a fin pipeline, the pressure regulating valve group pipeline is a pipeline formed by two parallel pressure regulating valves, a manual ball valve is arranged at the inlet and the outlet of each pressure regulating valve, a bypass pipeline is arranged for each pressure regulating valve, the manual ball valve is arranged on the pipeline, and the outlet of the pressure regulating valve group pipeline is connected back to the inlet of the crude oil booster pump; the other branch pipeline enters a self-cleaning filter or a bypass filter which is connected in parallel, fuel is selected to pass through the self-cleaning filter and the bypass filter through a combined three-way valve, in the normal working process, the fuel is selected to be communicated with the self-cleaning filter, the self-cleaning filter has the functions of differential pressure alarm and automatic cleaning, and when the self-cleaning filter fails, the bypass filter is communicated. The module outlet pipeline is communicated with an instrument pipeline and connected to a pressure gauge valve and a pressure gauge of an instrument panel, and meanwhile, the instrument pipeline is branched and connected with a pressure sensor; 7 kilograms of compressed air is introduced into the pneumatic change-over valve to drive the fuel change-over valve, and the module is in an explosion-proof area, so that an electric valve cannot be used and a safe explosion-proof pneumatic valve is selected; and 4 kilograms of nitrogen is introduced into the self-cleaning filter for backwashing, so that the risk of contact combustion of crude oil and air caused by electric sparks is avoided.
(3) Referring to fig. 6, the cycle module:
the circulating module is provided with two inlets which are respectively connected with the outlet of the diesel oil pressurizing module and the outlet of the fuel oil pressurizing module, the inlets are respectively connected with the manual ball valve and then reach the pneumatic change-over valve, namely the diesel oil prying/crude oil prying change-over valve, and two inlets of the pneumatic change-over valve are respectively provided with a one-way valve; the manual ball valves are arranged at the inlet and the outlet of the flowmeter, and meanwhile, a bypass pipeline is arranged for the flowmeter, and the manual ball valves are arranged on the pipelines. The mixed fuel oil enters the mixed fuel oil barrel after passing through the section of pipe system, a temperature transmitter is arranged at the inlet of the mixed fuel oil barrel to monitor the temperature of the fuel oil pumped from the oil bin, and a pressure gauge and a thermometer are arranged on the barrel body to monitor the temperature and the pressure of the mixed fuel oil. The top of the oil mixing barrel is provided with a liquid level switch and a mechanical exhaust device, the inlet and the outlet of the oil mixing barrel are provided with manual ball valves, and are also provided with bypass pipelines and ball valves, and the outlet of the exhaust device is connected to a crude oil daily cabinet; the mixed oil barrel is provided with a safety valve on the outlet pipeline, the bottom of the mixed oil barrel is provided with a discharge pipeline, and the discharge and safety valve outlets are connected to the oil collecting tank. The outlet of the oil mixing barrel is connected to a fuel oil circulating pump group, the two pumps are in a parallel state and are mutually redundant, and the inlet of each pump is provided with a manual ball valve and a Y-shaped filter; the outlets of the two fuel circulating pumps are one-way valves, the manual ball valves are connected at the back of the outlets, the pipelines before and after the parallel connection are connected to a pressure gauge valve and a pressure gauge of an instrument panel through instrument pipelines, the instrument pipelines are connected to a pressure difference switch of the instrument panel in a branching manner, and the instrument pipelines at the outlets of the outlets are connected to a pressure sensor in a branching manner; then, the electric heaters are connected in series, a bypass pipeline is arranged at the same time, a manual ball valve is arranged at the inlet and the outlet of each electric heater, and meanwhile, a manual ball valve is arranged at the inlet and the outlet of each bypass pipeline, and the single heater passage, the double heater series passage and the bypass pipeline passage are realized through the switches of the ball valves; each heater body is provided with a safety valve, an inlet and an outlet of each heater are provided with a discharge valve, and inlet and outlet pipelines of the heater group are provided with thermometers; the outlet of the heater group is connected with a viscosity measuring module, the viscosity measuring module mainly consists of a viscometer and a measuring flange, the inlet and the outlet of the viscosity measuring module are provided with manual ball valves, and are provided with bypass pipelines, and the manual ball valves are arranged on the pipelines; the outlet of the viscosity measuring module is connected to one inlet of the pneumatic switching valve, the valve is a switching valve of a normal pipeline or an emergency pipeline, and the viscosity measuring module is connected to the side of the normal pipeline; the emergency pipeline is communicated with a fuel circulation prying diesel inlet branch, a manual ball valve is arranged on the branch, and the branch is called as a 'big bypass' of fuel supply equipment; the outlet of the pneumatic change-over valve is connected with a prying block outlet duplex filter, the outlet of the duplex filter is connected to the outlet of the prying block through a manual ball valve, the front of the outlet is connected to a pressure gauge valve and a pressure gauge of an instrument panel through an instrument pipeline, and meanwhile, the instrument pipeline is branched and connected to a pressure sensor; the method comprises the following steps that a pipeline from an outlet of a switching valve of a normal pipeline/emergency pipeline to a double-filter pipeline of an outlet of a pry block is branched and connected to a main engine oil return pipeline, the pipeline and the main engine oil return pipeline reach an oil return pressure regulating valve together, a manual ball valve is arranged at an inlet and an outlet of the pressure regulating valve, an outlet of the pressure regulating valve is connected to a pneumatic switching valve, and the pneumatic switching valve is a plate cooler/cooler bypass; the three-way valve is selectively communicated with a plate cooler or a cooler bypass pipeline, the plate cooler refers to a plate cooler, and the bypass is composed of a pressure regulating valve and a manual ball valve at the inlet and the outlet of the pressure regulating valve; butterfly valves are respectively arranged at an inlet and an outlet of the cold side of the plate cooler, a discharge pipeline and a thermometer are respectively arranged on an oil inlet and an oil outlet pipeline, an outlet of the plate cooling oil and an outlet of a cooler bypass pipeline are converged and communicated to a pneumatic change-over valve, and the valve is a selection valve for returning oil to a mixed oil tank or returning oil to a daily cabinet; the return oil mixing barrel directly returns to the oil mixing barrel through a one-way valve, if the return oil mixing barrel returns to the daily cabinet, the pipeline leads to a pressure regulating valve of the daily cabinet, and a manual ball valve is arranged at the inlet and the outlet of the pressure regulating valve; the outlet of the pressure regulating valve is connected with the inlet of a manual three-way valve, and if the return oil returns to the daily cabinet, the return oil returns to the diesel oil daily cabinet or the crude oil daily cabinet.
1. The working mode of the application is as follows:
because the requirements of the marine use environment on the reliability and safety of the equipment are very strict, when a control system is designed, various working conditions need to be considered, so that the fuel supply equipment also has various working modes, and three major types, namely a manual mode, a semi-automatic mode and a full-automatic mode, mainly exist; the full-automatic mode comprises the following eight working modes:
(1) referring to fig. 7, cold start mode of operation:
in a host standby state, fuel is supplied to the host by utilizing a mode of joint operation of the diesel oil pressurization module and the fuel circulation module corresponding to the host; the diesel oil in the diesel oil daily cabinet is pumped by the diesel oil pressurizing module pressurizing pump and is subjected to primary pressurizing, the inlet of the fuel oil circulating module is positioned at the position of the diesel oil, and the diesel oil passes through the oil mixing barrel and is subjected to secondary pressurizing by the circulating pump, so that the diesel oil is circulated between the circulating module and the host; the oil returned by the main engine is cooled by the plate and then flows to the oil mixing barrel.
(2) Referring to fig. 8, the diesel auto-crude mode of operation:
the main engine is started in the cold vehicle mode and then carries in a load, the load is converted into a crude oil mode after reaching the rear, the crude oil conversion mode is the combined operation of the fuel oil pressurization module and the main engine corresponding circulation module, and the diesel oil pressurization module can be stopped after the crude oil mode is started. The import of the fuel oil pressurizing module is arranged on the crude oil side, the crude oil pressurizing pump extracts crude oil in the crude oil daily cabinet and performs primary pressurizing, the import of the fuel oil circulating module is positioned at the crude oil position, the crude oil passes through the oil mixing barrel and then performs secondary pressurizing through the circulating pump, the crude oil circulates between the circulating module and the host machine, the crude oil is heated by the electric heater according to the viscosity of the crude oil, and the oil returned by the host machine passes through the cooler bypass pipeline and then flows to the oil mixing barrel.
Diesel oil large cleaning device
(3) Referring to fig. 9, diesel big purge mode:
in the crude oil mode, the main engine normally runs under load; the large cleaning mode is that the inlet of the fuel oil pressurizing module is switched to the diesel oil side, the fuel oil pressurizing module pressurizing pump pumps the diesel oil in the diesel oil daily cabinet, and the diesel oil passes through the circulating module and enters the host machine to be consumed, so that the crude oil in the system is consumed, and the purpose of cleaning the crude oil in the fuel oil pressurizing module and the circulating module is achieved; the fuel flow lines are the same as the crude mode except that the circulating module determines whether the main return oil can pass through the plate cold by detecting the fuel viscosity.
(4) Referring to fig. 10, diesel mini purge mode:
if the two circulation modules work in the crude oil mode, the circulation module needs to enter a large cleaning mode, and the fuel oil pressurization module and the other circulation module work in the crude oil mode and cannot be converted into diesel oil, so that the circulation module can jump to a small cleaning mode when the circulation module is converted into the large cleaning mode (meanwhile, the circulation module can be manually converted into the small cleaning mode in the crude oil mode); the working condition of the small cleaning mode is the same as that of the cold vehicle mode and the emergency mode 1, and the diesel oil pressurizing module is used for cleaning the circulating module, so that crude oil in the circulating module is consumed.
(5) Referring to fig. 11, normal system shutdown mode:
stopping the operation of a circulating pump in the circulating module, and stopping the pressurizing module which operates in combination with the circulating pump on the premise of not influencing the working condition of the other circulating module; all valves in the circulation module and the pressurization module stopped by the circulation module recover to the initial positions.
(6) Referring to fig. 12, emergency mode 1 (diesel boost module-cycle module fueling)
The emergency mode 1 cannot be selected in the loop module, and the jump-in is carried out only after a specific fault occurs in a certain mode; generally, the circulation module and the fuel oil pressurization module are operated in a certain mode in a combined mode, the fuel oil pressurization module can enter an emergency mode 1 when a fault alarm (generally, the pressure of a crude oil booster pump cannot be built), and the working condition of the emergency mode 1 is the same as that of a cold vehicle mode and a small cleaning mode. The mode is mainly used for ensuring oil supply of the main engine under the condition of crude oil module failure.
(7) Referring to fig. 13, emergency mode 2 (diesel boost module direct supply host)
The emergency mode 2 is a jump entry when the circulation module has a fault (generally, the pressure of the circulation pump of the fuel circulation module cannot be established), or an entry is selected on the circulation module, and the emergency mode 2 can be directly selected in any mode; the emergency mode 2 is mainly characterized in that a diesel oil pressurization module is used as a unique power source for pressure building, and oil is supplied to a main machine through a large bypass inside a circulation module (after entering the circulation module, the oil directly reaches an outlet of the circulation module through a pipeline, namely, the whole circulation module is bypassed); the inlet of the circulating module is positioned on the diesel side, the outlet valve is changed from a normal position to an emergency position, and the return oil of the main engine does not return to the oil mixing barrel after being cooled by the plate but returns to the crude oil daily cabinet.
(8) Universal automatic start-stop mode for fuel oil pressurizing module, diesel oil pressurizing module and fuel oil circulating module
The corresponding booster pump or circulating pump operates in each mode, the pump group is in a one-use one-standby state, the working pump firstly gives 30s pressure to build, if the pressure is not built, the working pump is converted into a standby pump to operate, and if the pressure is still not built after 30s, the working of the module is stopped, and a fault alarm is reported (the standard of pressure building is a pressure or differential pressure switch); if the pressure of the pressurizing module and the pressure of the circulating module are both established, the corresponding mode can be entered. If the pressure of the working pump is reduced to the standard after entering the mode, the pressure cannot be reestablished within 5s, the standby pump is switched to, and the standby pump still has 30s time for pressure establishment.
2. The invention of this application is main points:
(1) electrical integration and control of fuel supply equipment for offshore platforms
The control system determines the level of automation of the fuel supply installation and, due to the dangers of the installation operating area, places high demands on the electrical design of the control system. According to the function of the fuel supply device: the fuel pressurizing module supplies fuel, automatically switches the fuel, automatically switches a fuel pump, automatically filters, gives an alarm under pressure difference and gives an alarm under fault; the diesel oil pressurizing module supplies diesel oil, the diesel oil pump automatically switches, the pressure difference alarm is carried out, and the fault alarm is carried out; the circulating pump of the circulating module is automatically switched, pressure difference alarm, viscosity and temperature control, heater heating power control, fault alarm, liquid level alarm, automatic exhaust, pneumatic valve smooth control and the like.
(2) Modular structure and electrical design technique
In the structural aspect, because the working principles of the oil supply equipment are almost the same, in order to improve the mobility and the flexibility of the equipment and meet the fuel supply conditions under different conditions (only in normal operation, crude oil is adopted to reduce the cost, and all other starting, stopping and emergency diesel oil are adopted); therefore, in designing, it is necessary to design in combination with the functions and structures of the modules, thereby improving the functionality and flexibility of the modules.
The electric modular design mainly reduces the complexity of a control system, and the electric modular design is respectively carried out by combining the working modes of fuel supply equipment through function analysis such as pressurization, heating, cooling, viscosity control and the like aiming at diesel oil and crude oil. The modular design reduces the complexity of the control system and improves the stability and reliability of the control system.
(3) Smooth fuel switching and adaptive adjustment technology
When fuel is switched between diesel and crude oil, if the speed is too high, the fuel pipeline is crystallized, the filtering system is damaged, and if the speed is set to be switched for too long time, the cost of the diesel is increased. In order to change the problem, the project adopts an automatic adjusting fuel switching technology, and a system automatically adjusts the speed of the rotating speed by calculating the temperature change rate of the fuel; if the temperature change rate is more than 2 ℃/min, the pneumatic valve is paused for a period of time until the temperature change rate reaches a reasonable range, and when the temperature change rate is too low, the temperature change rate of the fuel oil is increased by accelerating the rotation of the valve so as to meet the aim of quickly supplying the oil; by adopting the technology, the functions of smooth switching of fuel oil and automatic switching time adjustment are realized.
3. The invention has the beneficial effects that:
(1) the equipment has high working flexibility, and has three working modes of manual operation, semi-automatic operation and full-automatic operation;
(2) the self-adaptive adjustment of the fuel switching speed automatically adjusts the time of the fuel switching valve according to the temperature and the viscosity state of the fuel, thereby not only ensuring the realization of the fuel switching as soon as possible, but also avoiding the occurrence of the problem of fuel emulsification blockage;
(3) the modularized structural design provides sufficient space for manual execution of parts and disassembly, maintenance and repair of parts of the equipment;
(4) the control system is simple to operate, the operation of the whole fuel supply prying block system can be realized only by pressing a plurality of buttons in a full-automatic mode, and the control system is simple, convenient and easy to operate;
(5) the safety is high: the emergency mode 1 and the emergency mode 2 are guarantee under an automatic mode, and in addition, a semi-automatic mode and a manual mode are provided, so that the reliability of the whole system is gradually improved layer by layer, and the safe and reliable operation of the fuel supply equipment for the offshore platform is guaranteed.
Claims (8)
1. A fuel supply equipment for offshore platforms, characterized in that: the equipment comprises a diesel oil pressurization module, a fuel oil pressurization module and a circulation module, wherein the diesel oil pressurization module comprises a diesel oil pressure regulating pipeline and a diesel oil pressurization pipeline which are arranged in parallel, a diesel oil pressure regulating valve group is arranged on the diesel oil pressure regulating pipeline, a diesel oil pressurization pump group is arranged on the diesel oil pressurization pipeline, one end of the diesel oil pressure regulating pipeline and one end of the diesel oil pressurization pipeline are both communicated with an external diesel oil daily cabinet, and the other ends of the diesel oil pressure regulating pipeline and the diesel oil pressurization pipeline are both communicated with the circulation module;
the fuel oil pressurizing module comprises a diesel oil crude oil switching valve, a fuel oil filtering pipeline, a fuel oil pressure regulating pipeline and a fuel oil pressurizing pipeline which are arranged in parallel, wherein a fuel oil pressure regulating valve group is installed on the fuel oil pressure regulating pipeline, and a fuel oil pressurizing pump group is installed on the fuel oil pressurizing pipeline; the input end of the diesel crude oil switching valve is respectively communicated with an external diesel daily cabinet and an external fuel daily cabinet through a one-way valve, one ends of the fuel pressure regulating pipeline and the fuel pressurizing pipeline are communicated with the output end of the diesel crude oil switching valve, the other ends of the fuel pressure regulating pipeline and the fuel pressurizing pipeline are communicated with the fuel cleaning and filtering pipeline, and the other ends of the fuel cleaning and filtering pipeline are communicated with the circulating module;
the circulation module includes circulation module 1 and circulation module 2, circulation module 1 and circulation module 2 all include the circulation pipeline, the diesel oil sled crude oil sled diverter valve, the oil mixing bucket, the fuel circulation pump package, heater group and the viscosity measurement module that connect gradually on the circulation pipeline, the input of circulation module 1 and circulation module 2's circulation pipeline all communicates with diesel oil boost module, fuel boost module, circulation module 1 and circulation module 2's circulation pipeline's output communicates with the different crude oil generator in outside respectively.
2. The fuel supply apparatus for offshore platforms of claim 1, wherein: and the output end of the circulating pipeline is also provided with a normal emergency switching valve, and the switching output end of the normal emergency switching valve is communicated with the communication position of the input end of the circulating pipeline and the diesel oil pressurizing module.
3. The fuel supply apparatus for offshore platforms according to claim 1 or 2, characterized in that: the output end of the circulating pipeline is also provided with an oil return pipeline, the oil return pipeline is provided with an oil return pressure regulating valve group, a cooler and an oil drum and oil tank conversion valve, the oil drum output end of the oil drum and oil tank conversion valve is communicated with the oil mixing barrel, the oil tank output end of the oil drum and oil tank conversion valve is connected with a diesel crude oil conversion valve, the diesel oil output end of the diesel crude oil conversion valve is communicated with an external diesel oil daily cabinet, and the crude oil output end of the diesel crude oil conversion valve is communicated with the external crude.
4. The fuel supply apparatus for offshore platforms of claim 1, wherein: the heater group is provided with a plurality of heaters which are connected in series or in parallel, bypass switches are connected on the heaters in parallel, safety valves are also arranged on the heaters, the inlet and the outlet of each heater are provided with a relief valve, and the inlet and the outlet pipelines of the heater group are provided with thermometers.
5. The fuel supply apparatus for offshore platforms of claim 1, wherein: the diesel oil pressure regulating valve group and the crude oil pressure regulating valve group are both composed of two pressure regulating valves connected in parallel.
6. The fuel supply apparatus for offshore platforms of claim 1, wherein: the diesel booster pump group comprises two diesel booster pumps which are arranged in parallel, and the crude oil booster pump group comprises two crude oil booster pumps which are arranged in parallel.
7. The fuel supply apparatus for offshore platforms of claim 1, wherein: the fuel oil cleaning and filtering pipeline is formed by connecting a self-cleaning filter and a bypass filter in parallel.
8. A fuel supply method for an offshore platform is characterized by comprising the following steps: the method uses the fuel supply equipment for the offshore platform according to any one of claims 1 to 7, and comprises a manual, a semi-automatic and a full-automatic working mode, wherein the full-automatic working mode comprises the following working modes:
(1) cold vehicle start operation mode
In a host standby state, fuel oil is supplied to the host by using a mode of joint operation of a diesel oil pressurization module and a circulation module corresponding to the host, the diesel oil in a diesel oil daily cabinet is pumped by the diesel oil pressurization module pressurization pump and subjected to primary pressurization, the inlet of the circulation module is positioned at a diesel oil interface, the diesel oil passes through a fuel mixing barrel and then is subjected to secondary pressurization by a circulating pump, the diesel oil is circulated between the circulation module and the host, and the return oil of the host passes through a cooler and then flows to the fuel mixing barrel;
(2) diesel oil automatic-to-crude oil operation mode
The main engine is started in a cold engine mode and then carries a load, the load is converted into a crude oil mode after reaching the cold engine mode, the crude oil conversion mode is the combined operation of a fuel oil pressurization module and a main engine corresponding circulation module, the diesel oil pressurization module is stopped after entering the crude oil mode, the inlet of the fuel oil pressurization module is arranged at the crude oil side, the crude oil in a crude oil daily cabinet is extracted and subjected to primary pressurization by the crude oil pressurization pump, the inlet of the fuel oil circulation module is positioned at the crude oil interface, the crude oil is subjected to secondary pressurization by a circulating pump after passing through a crude oil mixing barrel and is circulated between the circulation module and the main engine, meanwhile, the crude oil is heated by an electric heater according to the viscosity of the;
(3) diesel big cleaning mode
In the crude oil mode, the main machine normally runs under load, in the large cleaning mode, an inlet of the fuel oil pressurizing module is switched to a diesel oil side, and the fuel oil pressurizing module pressurizing pump pumps diesel oil in the diesel oil daily cabinet, passes through the circulating module and enters the main machine for consumption; the fuel flow pipeline is the same as the crude oil mode, and whether the return oil of the main engine can pass through the cooler is determined by detecting the viscosity of the fuel oil in the circulating module;
(4) diesel mini purge mode
Cleaning the circulating module by using a diesel pressurizing module, and consuming crude oil in the circulating module;
(5) normal system shutdown mode
Stopping the operation of a circulating pump in the circulating module, and stopping the pressurizing module which is operated in combination with the circulating module on the premise of not influencing the working condition of the other circulating module, wherein all valves in the circulating module and the stopped pressurizing module are restored to the initial positions;
(6) emergency mode 1
The emergency mode 1 cannot be selected in the loop module, and the jump-in is carried out only after a specific fault occurs in a certain mode; the general situation is that the circulation module and the fuel oil pressurization module are operated in a certain mode in a combined mode, the fuel oil pressurization module can enter an emergency mode 1 when a fault alarm occurs, the working condition of the emergency mode 1 is the same as that of a cold vehicle mode and a small cleaning mode, and the mode mainly ensures that a main engine supplies oil under the condition that a crude oil module has a fault;
(7) emergency mode 2
The emergency mode 2 is a jump entry when the circulation module fails, or an entry is selected on the circulation module, and the emergency mode 2 can be directly selected in any mode; in the emergency mode 2, a diesel oil pressurization module is used as a unique power source for pressure establishment, and oil is supplied to a main engine through a large bypass in a circulation module; the inlet of the circulating module is positioned on the diesel side, the outlet valve is changed from a normal position to an emergency position, and the return oil of the main engine is cooled by a plate and then does not return to the oil mixing barrel but returns to the crude oil daily cabinet;
(8) universal automatic start-stop mode for fuel oil pressurizing module, diesel oil pressurizing module and fuel oil circulating module
The corresponding booster pump or circulating pump operates in each mode, the pump group is in a one-use one-standby state, the working pump firstly gives 30s pressure to build, if the pressure is not built, the working pump is converted into a standby pump to operate, and if the pressure is still not built after 30s, the working of the module is stopped, and a fault alarm is reported; if the pressure of the pressurizing module and the pressure of the circulating module are both established, the corresponding mode can be entered; if the pressure of the working pump is reduced to the standard after entering the mode, the pressure cannot be reestablished within 5s, the standby pump is switched to, and the standby pump still has 30s time for pressure establishment.
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