Background technology
Spot ship power supply technique mainly includes three parts using bank electricity power supply technique, the technology:Power on the bank
System, cable connection device and ship are by electric system.
Electric power system on the bank:Electric power system makes electric power be fed to the tie point close to ship from high voltage substation on the bank;
Cable connection device:Connect cable and equipment between current-collecting device on shore connection and ship.Cable connection device
Must be fulfilled for it is quick connect and the requirement of storage, without using when storage aboard ship, on the bank or on barge;
Ship is by electric system:Aboard ship it is fixedly mounted by electric system, may be including transformer and correlation on cable reel, ship
Electrical management system etc..
Existing bank electricity power supply mode is broadly divided into that low pressure is gone on board and high pressure is gone on board two ways:
Low pressure is gone on board:Compare typically Los Angeles port, Los Angeles port medium-pressure electricity supply voltage is 34.5kV, after decompression
Quayside provides 6.6kV buried electronic box.For distribution voltage be low pressure 440V by electric ship, employ an outfit hawser
Winch connects electric power system on the bank with the barge of transformer and by electric ship, and the transformer on barge makes the voltage drop of 6.6kV on the bank
For 440V(The ship that distribution voltage is high pressure 6.6kV does not need barge connection)Afterwards in supply by electric ship.
High pressure is gone on board:Compare typically Goteborg port, it provides 10kV tie point, the access of 10kV high pressures on bank
Dropped to after by electric ship through marine transformer transformation by electric applied voltage.
Above-mentioned power supply mode be electric energy from being supplied on the bank by electric ship, i.e., needed to power by electric ship every time, then it is necessary
Harbour is found to stop, could be by electricity.If by electric ship in way is navigated by water, electric energy deficiency, then no navigation to will occur before harbour
Have a power failure.The working ship of particularly interior korneforos, sand dredger, passenger boat etc., the Ship Structure of existing interior korneforos is simple, old, without from
Generating capacity, repack self power generation ship cost height into, difficulty is big, therefore spot ship uses bank electricity power supply mode mostly, if navigation
Out of power before to harbour, then cannot electricity consumption, operation;For working ship, out of power needs to navigate by water and charged to harbour, returns again to work
Industry point, many activity durations can be wasted by coming and going in way.
Utility model content
The purpose of this utility model is:For above-mentioned problem, there is provided a kind of LNG power supply boats, the power supply boat energy
Enough self-generatings, by its caused electric energy supply by electric ship, make anywhere can be ensure that by electric boatman by electricity by electric ship
The reliability of work.
The technical solution adopted in the utility model is as follows:
A kind of LNG power supply boats, power supply boat are provided with LNG fuel feed systems, gas electricity generator and distribution system, the combustion
Gas generator is connected with LNG fuel feed systems, and the LNG fuel feed systems provide fuel, the combustion for gas electricity generator
Gas generator supplies the electric energy of output by electric ship by distribution system;
The LNG fuel feed systems include LNG storage tank and the LNG charging systems being connected in LNG storage tank and supply is
System, the charging system are used to fill LNG into LNG storage tank;The air supply system is connected with gas electricity generator, and LNG storage tank goes out
The LNG come becomes NG (natural gas) after air supply system pressurization vaporization and is sent to gas electricity generator.
Due to said structure, LNG fuel feed systems and gas electricity generator, gas electricity generator burning are set on power supply boat
LNG is generated electricity, and the supply of the electric energy of output is used by electric ship, can ensure by electric ship from anywhere in shipping way by
Electricity, by electric flexibly convenient.And the characteristics of LNG has high combustion efficiency as clean energy resource, and environmental pollution is small, it can replace
Coal oil is as generator fuel, the problem of can solve the problem that coal oil resource anxiety.
Spot ship, mainly inland navigation craft, their small volumes, simple in construction, self power generation ability simultaneously, repack into from
The modification difficulty of generating ship is big, and financial cost is high;Even if there is the ship of self power generation ability, also mostly using coal oil as hair
Electric fuel, is polluted to environment, and is not easy to repack LNG generatings into.
But the use of above-mentioned ship is off, will also result in the wasting of resources;Therefore LNG power supply boats of the present utility model, energy
Enough solve the problems, such as that above-mentioned ship generates electricity, avoid it from scrapping.LNG clean, it is efficiently, cheap, thus also solve it is existing from
Generating ship pollution on the environment(Coal oil generates electricity), while save the self power generation expense of existing self power generation ship.
Further, the air supply system includes force (forcing) pump, carburetion system, surge tank;The LNG storage tank by pipeline and
Valve is sequentially connected with force (forcing) pump, carburetion system, surge tank, gas electricity generator.
The LNG that LNG storage tank comes out, pressurizes by force (forcing) pump, after carburetion system is vaporized into NG, is sent to surge tank and combustion successively
Gas generator.
Further, the carburetion system includes LNG vaporization device and vaporizer thermal source feed system;The vaporizer thermal source
Feed system is connected on LNG vaporization device, and the LNG vaporization device is respectively connecting to force (forcing) pump and buffering by pipeline and valve
Tank.
The thermal source of the LNG vaporization device is supplied by vaporizer thermal source feed system, and the thermal source is used to heat LNG, makes LNG vapour
It is melted into NG.
Further, the vaporizer thermal source feed system includes heater, the heater by pipeline and valve with
LNG vaporization device is interconnected to form loop;The heater is connected to the cooling of gas electricity generator by pipeline and valve
Water vat;The cooling waster vat provides hot water for heater, and hot water is sent into LNG vaporization device by heater, and hot water is by LNG vaporization into NG
Flow back in heater from LNG vaporization device, then discharged from heater again afterwards.
Due to said structure, heating after the water cooling generator in gas electricity generator cooling waster vat, can be used in heating
LNG, waste water is reused, save the energy, and hot dirt is caused to environment after avoiding the cooling water heating in cooling waster vat
Dye.
Further, the vaporizer thermal source feed system is water glycol heating system, and hot water flows to from LNG vaporization device
Expansion drum is provided with the pipeline of heater;Ethylene glycol filler is provided with the expansion drum.
It is higher in view of the freezing point temperature of water(0℃), by the cooling water in cooling waster vat and a certain proportion of ethylene glycol(Ice
Point is relatively low, -20 DEG C to -30 DEG C)After mixing, the heat exchange of LNG vaporization device is used further to, is so managed not-easy-to-freeze.Expansion drum is touched simultaneously,
Pressure regulation effect is played in the pipeline, loine pressure is mutated after avoiding LNG vaporization work, influences the pipe in water glycol heating system
Circulate on road.
Further, NG heating systems are additionally provided between the LNG vaporization device and surge tank;NG heating systems add including NG
Hot device and NG heater thermal source feed system, the NG heaters thermal source feed system are connected on NG heaters, and the NG adds
Hot device is respectively connecting to LNG vaporization device and surge tank by pipeline and valve;The NG heaters thermal source feed system includes adding
Hot equipment, the firing equipment are interconnected to form loop by pipeline and valve with NG heaters;The firing equipment
The cooling waster vat of gas electricity generator is connected to by pipeline and valve;The cooling waster vat provides hot water for firing equipment, heating
Hot water is sent into NG heaters by equipment, is flowed back to again from NG heaters in firing equipment after NG is heated, then arranged from firing equipment
Go out;The NG heaters thermal source feed system is water glycol heating system, and hot water flows to the pipe of firing equipment from NG heaters
NG heating system expansion drums are provided with road;Ethylene glycol filler is provided with the NG heating systems expansion drum.
Due to said structure, NG heating systems are set between LNG vaporization device and surge tank, are in order to avoid LNG vaporization device
Vapourizing temperature is inadequate, and the NG temperature and pressures after vaporization do not reach requirement, therefore logical NG heating systems are to the NG after vaporization
Heating pressurization again is carried out, ensures the stability and reliability of pipe-line system work.
Further, the LNG liquid phases that the LNG charging systems include connecting with LNG storage tank fill interface and fill return-air
Outlet.
The LNG liquid phases fill interface, and LNG storage devices are connected with LNG cargo ships or on the bank, and LNG is passed through into LNG liquid phases
Structure is filled to fill in LNG storage tank;Fill return air outlet to be used to discharge the gas in LNG storage tank, ensure the pressure in LNG storage tank
Power is stable.Generally, fill return air outlet and also take back LNG cargo ships or on the bank LNG storage devices, ensure LNG cargo ships
Or on the bank in LNG storage devices LNG storage tank pressure stabilization.
Meanwhile use LNG cargo ships to fill LNG for power supply boat, it can continual be by electric ship that can ensure power supply boat
Power supply.
Further, LNG storage tank is connected by drain pipe with force (forcing) pump, and the force (forcing) pump is linked back by precooling liquid back pipe
LNG storage tank, the LNG storage tank, drain pipe, force (forcing) pump and precooling liquid back pipe form pre- cold loop.
The pre- cold loop is used for precooling pipeline and force (forcing) pump, avoid LNG from LNG storage tank out when, make pipeline and plus
Press pump is cooled and damaged immediately.During precooling, a small amount of LNG is flowed out from LNG storage tank, a small amount of LNG of outflow in pipeline from
So after vaporization, precooling pipeline;After the completion of precooling, then toward being passed through a large amount of LNG, normal work in pipeline.
Further, LNG storage tank is connected by drain pipe with force (forcing) pump, and the force (forcing) pump is linked back by circulating liquid back pipe
LNG storage tank, the LNG storage tank, drain pipe, force (forcing) pump and circulation liquid back pipe form LNG storage tank circulation loop.
The LNG storage tank circulation loop is used to balance the pressure in LNG storage tank, when the LNG in LNG storage tank is vaporized
When, part LNG can be made to enter in circulating pipe system, balance LNG storage tank internal pressure, ensure LNG safety storage.
Further, BOG electricity generation systems are also associated with LNG storage tank;The BOG electricity generation systems include empty formula vaporizer,
Water bath type vaporizer, fuel gas pressure-regulating box and BOG generators;The LNG storage tank by pipeline and valve successively with empty formula vaporizer,
Water bath type vaporizer, fuel gas pressure-regulating box connect with BOG generators.
Because LNG pipe-line systems are storing and can produce LNG steams, i.e. BOG in operating process, in the prior art, in order to
Ensure the pressure stability of LNG pipe-line systems, it has to discharge BOG gases;LNG waste can be so caused, and this practicality is new
BOG is used to generate electricity by type, and BOG is reused, avoids energy waste.
In summary, by adopting the above-described technical solution, the beneficial effects of the utility model are:
LNG power supply boats of the present utility model can be provided electric energy by electric ship, make to be charged during navigation by electric ship,
Harbour need not be returned to;Charging is flexibly convenient.Pre- cold loop and LNG storage tank circulation loop in LNG fuel feed systems, ensure that
The security reliability of LNG pipe-line systems.BOG electricity generation systems, the BOG gases in LNG pipe-line systems is utilized herein, avoid the energy
Waste.
Embodiment 1
A kind of LNG power supply boats, power supply boat deck are provided with LNG fuel feed systems, gas electricity generator 19 are set in cabin,
The gas electricity generator 19 is connected with LNG fuel feed systems, and the LNG fuel feed systems are that gas electricity generator 19 provides combustion
Material, the gas electricity generator 19 is by the electric energy of output by the complicated treatment and supplied such as grid-connected, transformation of distribution system by electric ship;
The LNG fuel feed systems include LNG storage tank 3 and the LNG charging systems and air supply system that are connected in LNG storage tank 3, described
Charging system is used to fill LNG into LNG storage tank 3;The air supply system is connected with gas electricity generator 19, what LNG storage tank 3 came out
LNG becomes NG after air supply system pressurization vaporization and is sent to gas electricity generator 19.The air supply system includes force (forcing) pump 9, vaporization
System, surge tank 16;The LNG storage tank 3 passes through pipeline and valve and force (forcing) pump 9, carburetion system, surge tank 16, fuel gas generation
Machine 19 is sequentially connected.
The carburetion system includes LNG vaporization device 11 and vaporizer thermal source feed system;The vaporizer thermal source supply system
System is connected on LNG vaporization device 11, and the LNG vaporization device 11 is respectively connecting to force (forcing) pump 9 and surge tank by pipeline and valve
16。
The vaporizer thermal source feed system includes heater 14, and the heater 14 passes through pipeline and valve and LNG vapour
Change device 11 and be interconnected to form loop;The heater 14 is connected to the cooling of gas electricity generator 19 by pipeline and valve
Water vat;The cooling waster vat is that heater 14 provides hot water, and hot water is sent into LNG vaporization device 11 by heater 14, and hot water is by LNG vapour
Flow back in heater 14 from LNG vaporization device 11 after chemical conversion NG, then discharged from heater 14 again.
The vaporizer thermal source feed system is water glycol heating system, and hot water flows to heater from LNG vaporization device 11
Expansion drum 12 is provided with 14 pipeline;Ethylene glycol filler 13 is provided with the expansion drum 12.
The LNG liquid phases that the LNG charging systems include connecting with LNG storage tank 3 fill interface 1 and fill return air outlet 2.This
LNG liquid phases fill interface 1 and are connected with filling return air outlet 2LNG cargo ships LNG storage tank 3 in embodiment.
LNG storage tank 3 is connected by drain pipe with force (forcing) pump 9, and the force (forcing) pump is linked back LNG storage tank by precooling liquid back pipe 8
3, the LNG storage tank 3, drain pipe, force (forcing) pump 9 and precooling liquid back pipe 8 form pre- cold loop.
LNG storage tank 3 is connected by drain pipe with force (forcing) pump 9, and the force (forcing) pump is linked back LNG storage tank by circulating liquid back pipe 7
3, the LNG storage tank 3, drain pipe, force (forcing) pump 9 and circulation liquid back pipe 7 form LNG storage tank circulation loop.
BOG electricity generation systems are also associated with LNG storage tank 3;The BOG electricity generation systems include empty formula vaporizer 4, water-bath type vapour
Change device 5, fuel gas pressure-regulating box 6 and BOG generators 18;The LNG storage tank 3 by pipeline and valve successively with empty formula vaporizer 4, water
Bath vaporizer 5, fuel gas pressure-regulating box 6 connect with BOG generators 18.
In the present embodiment, surge tank 16 connects 6 gas electricity generators 19 by pipeline, LNG is provided combustion for 6 generators
Material.The power of every generating is 1500kW.4000kW to 8000kW power is provided when 6 generators is outwards powered;
In the present embodiment, BOG generators 18 use one, and BOG power is 150KW, and the electric energy that BOG generators 18 provide is used to power
Ship is used by oneself, such as the life power supply of power supply boat.