CN106513923A - Device and method for preparing high-pressure bottled metal cutting and welding gas from recycled BOG - Google Patents
Device and method for preparing high-pressure bottled metal cutting and welding gas from recycled BOG Download PDFInfo
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- CN106513923A CN106513923A CN201710011358.8A CN201710011358A CN106513923A CN 106513923 A CN106513923 A CN 106513923A CN 201710011358 A CN201710011358 A CN 201710011358A CN 106513923 A CN106513923 A CN 106513923A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K7/00—Cutting, scarfing, or desurfacing by applying flames
- B23K7/10—Auxiliary devices, e.g. for guiding or supporting the torch
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K7/00—Cutting, scarfing, or desurfacing by applying flames
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- Mechanical Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention provides a device and method for preparing high-pressure bottled metal cutting and welding gas from recycled BOG. The device comprises a base and a frame, wherein a BOG gas source inlet is formed in the base; an air temperature type temperature booster, a pressure regulating and metering system, a buffer tank, a gain agent filling system, a natural gas compressor, a high-pressure gas storage bottle group and a gas dispenser are arranged in the frame; and after the recycled BOG generated in a LNG storage tank or a tank car is heated, the pressure of the recycled BOG is regulated and the recycled BOG is metered, the recycled BOG is released into the buffer tank for storage and pressure stabilization, is mixed with a rare earth gain agent and activated, and then is pressurized to the pressure of 25.0 MPa via the natural gas compressor, thus, the metal cutting and welding gas bottles are filled with the recycled BOG by the gas dispenser, and the recycled BOG is used as metal cutting and welding gas. The BOG generated in the LNG storage tank or the tank car is recycled, environmental pollution caused by optional emission of the BOG is avoided, the BOG can be prepared into the novel metal cutting and welding gas, and is used as the novel cutting and welding gas instead of acetylene which is high in energy consumption, heavy in pollution and poor in safety, the problem that domestic cutting and welding gas fuel is scarce is solved, and the whole device is complete in function, compact in structure and convenient to convey, mount, operate and repair.
Description
Technical field
The present invention relates to the recovery of BOG, catalysis and high pressure fill a bottle technical field, specifically reclaim in LNG tank cars or storage tank
The BOG of generation, cuts weldering gas as novel metal after injecting accelerant activation and high pressure fills the device and method of bottle.
Background technology
In modern world industrial combustion gas field, acetylene gas in metal cuts Welding still in monopoly position, but Yin Qiyi
Combustion is explosive, and safety coefficient is low, power consumption of consuming energy in production process, pollutes environment, and production cost is higher, so that in production, storage, fortune
It is defeated, use, environmental protection and there is many defects and hidden danger in price, development is greatly limited, it is many country all develop
New safer, more energy efficient metal cuts weldering gas.Ministry of Machine-Building Industry of China in 1995 is bright in national acetylene production meeting
Newly-built enlarging calcium carbide factory, acetylene factory are no longer examined really, existing producer faces the condition changed the line of production.State Scientific and Technological Commission is early in eight or five phases
Between, just strongly promote oil gas (such as " propane flammable gas ", " propylene gas ", " propylene gaseous mixture " etc.) and substitute acetylene gas, but due to this
The ignition temperature of a little products, the welding of preheating time, air consumption, service efficiency and ferrous metal, spraying, heat treatment, cutting is big,
All have the shortcomings that in terms of the practical applications such as thick metal material that some are difficult to overcome.By contrast, add few in natural gas
The accelerant of the rare earth organic compounds of amount, plays the specific functions such as its combustion-supporting, inhibition, catalysis.Additive can be completely with base material
It is mutually dissolved, flame frequency and wavelength can be changed under fired state, intensify methane medium, makes it to discharge more heat
Can, while suppressing burning flame to external radiation, flame is more concentrated, and to reach higher temperature (more than 3300 DEG C), cost is only second
Alkynes is cut and is welded into this 40%, thus becomes current most efficient, most economical, most environmentally friendly, safest metal and cut weldering gas.
Furthermore, since the natural gas west_east gas transmission pipeline insertion, in order to meet growing natural gas needs, China is
From external a large amount of imported Ls NG (liquefied natural gas), the country has also built up LNG liquefaction plants, and in the near future, LNG will become
Another kind of important way that natural gas is popularized in China, development prospect are wide.But due to the day of LNG in LNG storage tank or tank car
Evaporation rate about up to 1～2%, this part boil-off gas (temperature is relatively low, generally -80～-162 DEG C) abbreviation BOG (Boil Off
Gas flash steams), the proportion of BOG is compared with air weight, and inflammable and explosive, domestic thousands of LNG satellite stations, peak regulation station and LNG
Liquid filling station is configured without low temperature BOG retracting devices, and in operation, BOG superpressures must be about which to airborne release, the BOG of discharge
The 1-2% of storage LNG volumes, if this part BOG is not recycled, leaves its discharge in atmosphere, not only causes the energy
Significant wastage, also serious pollutes air (CH4Suitable same volume CO of pollution level221 times of pollution level).
The content of the invention
The technical problem to be solved is to provide a kind of bottled metal of BOG making high pressure that reclaims and cuts weldering gas equipment,
The equipment using the BOG produced in the LNG storage tank or tank car of recovery Jing heat up, activation after refill in high-pressure gas cylinder group as
Metal is cut weldering gas and is used, and not only reclaims the BOG produced in LNG storage tank or tank car, replaces high energy consumption, the acetylene of heavily contaminated
As novel cutting weldering gas uses, solve the problems, such as novel metal cut weldering gas it is rare, also for domestic LNG storage tank or tank car generation
BOG provides optimal recycling approach, protects environment, improves safety coefficient, and whole equipment compact conformation, fortune
Defeated, installation and operation maintenance are all more convenient.
To solve above-mentioned technical problem, the present invention is adopted the following technical scheme that：Reclaim the bottled metal of BOG making high pressure and cut weldering
Gas equipment, including base and prying body, prying body are arranged on base, and base is provided with BOG gas source inlets, and air temperature is provided with prying body
Formula heating device, pressure regulation metering system, surge tank, accelerant loading system, natural gas compressor, high-pressure gas cylinder group and aerating
Machine, the air inlet of air temperature type heating device are connected with BOG gas source inlet pipelines, and the source outlet of air temperature type heating device is through pressure regulation meter
Amount system is connected with the air inlet of surge tank, and described accelerant loading system is connected with the inlet pipeline of surge tank, buffering
The gas outlet of tank is connected with natural gas compressor, and the gas outlet of natural gas compressor is divided into two-way, all the way through high-pressure gas
Bottle group is connected with filling machine, and another road is directly connected with filling machine, described air temperature type heating device, pressure regulation metering system, gain
Agent loading system, surge tank, natural gas compressor, high-pressure gas cylinder group and filling machine are installed on base.
Described accelerant loading system is made up of accelerant storage tank, membrane pump and singlechip controller, accelerant storage tank
Built with rare earth accelerant, accelerant storage tank is connected with membrane pump, and described membrane pump is by singlechip controller control, membrane pump
0.2～0.76MPa of operating pressure, maximum output pressure 1.73MPa, one-stroke liquid volume added 20～400mg/ time, frequency 1～200
Beat/min.
The swept volume of described surge tank is 0.5m3, operating pressure is 1.6MPa；The volume of described natural gas compressor
Pressure at expulsion is determined for 25.0MPa；Described high-pressure gas cylinder group includes at least two high-pressure gas cylinders, single high-pressure gas cylinder volume
Operating pressure is determined for 25.0MPa, gas storage when high-pressure gas cylinder group can change gas bomb bottle operation is filled, QI invigorating when filling bottle keep away
Exempt from natural gas compressor frequent shutdown；The rated pressure of described filling machine is 25.0MPa.
For the sake of for simple declaration problem, weldering gas is cut to the bottled metal of recovery BOG of the present invention making high pressure below and is set
Standby this equipment of abbreviation.
This equipment can be used for LNGV (LNGV) liquid filling station, liquefaction-automobile with compressed natural gas (L-CNGV)
BOG the and LNG tank cars that the LNG storage tank operation process of gas station, LNG satellite stations or peak regulation station is produced unload remaining BOG after liquid
Recycling.This equipment can be by the BOG for reclaiming through the intensification of temp.-controlled type gasifier, pressure regulation metering, the activation of rare earth accelerant
Process is produced rare earth BOG and cuts weldering gas as metal, then is directly entered using filling machine Jing after natural gas boosting machine is pressurized to 25.0MPa
Row fills bottle, or is first filled with the storage of high-pressure gas cylinder group, further according to needing to fill bottle using filling machine, does not only reach economy, efficiently
Ground recycles the purpose of BOG, and the metal of production is cut weldering gas and can also substitute high energy consumption, heavily contaminated, explosive acetylene gas, fills
Its at a relatively high energy saving and emission reduction effects is waved in distribution.When in use, can by this equipment be arranged on LNG satellite stations, peak regulation station or
Near the BOG floss holes of the LNG storage tank of LNGV liquid filling stations etc., the induce one BOG of this equipment of the BOG of discharge are entered using connecting pipeline
QI KOU, is warming up to -25～-15 DEG C through air temperature type heating device, delays in leaking into surge tank Jing after the metering of pressure regulation metering system pressure regulating
Punching, voltage stabilizing, accelerant loading system automatic filling rare earth accelerant, both are sufficiently mixed in surge tank, activate, to improve
The combustion heat value of BOG is increased substantially and cuts weldering speed degree, then again through natural pressure with weldering temperature, reduction specific consumption is cut
Contracting machine is pressurized to 20.0～25.0MPa, sends into the storage of high-pressure gas cylinder group, is filled with to cut in weldering gas cylinder by filling machine metering and is used as
Metal is cut weldering gas and is used, and greatly increases metal and cuts weldering gas filling weight, for market demand.
Weldering gas method is cut present invention also offers reclaiming BOG and making the bottled metal of high pressure, is comprised the following steps：
(1) heat up：The gas outlet of LNG tank cars or storage tank is connected with BOG gas source inlets, is made remaining in LNG storage tank or tank car
Press the BOG for 0.3～1.0MPa to enter air temperature type heating device, -25～-15 DEG C are warming up to through air temperature type heating device；
(2) voltage stabilizing：BOG after intensification leaks into buffering, voltage stabilizing in surge tank Jing after the metering of pressure regulation metering system pressure regulating；
(3) activate：Accelerant loading system is under singlechip controller control according to 4～7g rare earths accelerant/1Nm3BOG
Ratio the rare earth accelerant in accelerant storage tank is pumped in surge tank, be sufficiently mixed, activate, urge with the BOG in surge tank
Change, make BOG be converted into rare earth BOG metals and cut weldering gas；
(4) it is pressurized, fills bottle：By the rare earth BOG metals in surge tank cut weldering gas Jing natural gas compressors be compressed to 20.0～
It is filled with high-pressure gas cylinder group after 25.0MPa, or is directly filled with high-pressure metal and cuts by filling machine and be used as metal in weldering gas cylinder and cut weldering
Gas.
The swept volume of surge tank is 0.5m3, operating pressure is 1.6MPa.
The rated pressure of high-pressure gas cylinder group is 25.0MPa, and the function of high-pressure gas cylinder group is to fill a bottle operation replacing storage
Gas storage during gas cylinder, QI invigorating when filling bottle, in order to avoid natural gas compressor frequent shutdown.
Described rare earth accelerant is, by " rare earth compound ", to be aided with the organo-metallic compound (compound of ring cyclopentadienyl diene
Deng) and fuel cleaning agent, with high catalytic performance and magnetics, optical property.Its special electron shell of the constituent element element
Structure, unique 4f layer electronics, shows special chemical feature when with other materials phase separation, can with it is most of it is nonmetallic into
Contain the coordination compound of several chemical bonds in key, or even a kind of compound simultaneously, not only have performance in RE-O keys, in RE-C
Key is as the same, and also hydrogen forms RE-H keys as bridge atom, and rare earth element has 5d tracks and is not filled with electrons full 4f tracks,
Stable coordinate bond is easily formed, that is, has good affinity with CH groups.And the CH numbers absorbed by unit mass are than general
Element is more, and affinity is strong.So as to the specific function such as good catalysis, combustion-supporting, inhibition, stable being played to Hydrocarbon and being made
With this affinity is exactly complexing power.In high-temperature gas, with the aggravation of molecular motion, instantaneously collision aggravation is bonded and divides
Solution is frequent, causes chain reaction, result in good catalysis, combustion-supporting mechanism and formed.
The present invention cuts cutting for weldering gas by the metal that addition rare earth accelerant is formed and welds temperature up to 3300 DEG C, carries compared with acetylene
It is high 600～900 DEG C, the thermal efficiency is greatly improved, fuel consumption is reduced, cut weldering speed it is faster than acetylene, cost is only acetylene
30～40%, welding cut bit as acetylene need not be changed and cut tool, and high-pressure metal is cut and welds the rated pressure of gas cylinder and be
20.0MPa, 13.33 times for acetylene of same volume storage tolerance, and special gasification installation need not be filled.Effectively improving fire
Flame temperature, saves combustion gas and while prolonging burning time, oxygen consumption reduces more than 15%, and the welding otch of workpiece is smooth, do not hang
Slag, it is narrower than acetylene scarfing 0.5 millimeter, cut weldering process and be not tempered, not detonation, do not produce the toxic gas such as hydrogen phosphide, hydrogen sulfide, fire
Burn down complete；Discharge and the three waste discharge of pollution environment of carbon monoxide and hydrocarbons are essentially eliminated, dioxy is greatly reduced
Change the discharge of carbon, realize low-carbon emission.
The recovery BOG of the present invention makes the bottled metal of high pressure and cuts weldering gas method, realizes the recycling of BOG, both carried
In high LNG storage tank or tank car, the utilization rate of BOG, increased economic benefit；Further through being activated to BOG and pressurized treatment,
The combustion heat value and high-pressure metal that improve BOG cuts the storage capacity that metal in weldering gas cylinder cuts weldering gas, breaks through novel metal and cuts weldering gas
The bottleneck for promote, utilizing, cuts weldering for China's metal and provides economic, efficient source of the gas, energy-saving and emission-reduction, with a relatively high social economy
Benefit.
And, the metal for activating acquisition by BOG cuts weldering gas, and to iron and steel metalloid container, not there is no chemistry instead in burn into
Should, not wall built-up, do not crystallize, deposit-free, do not block a bottle nozzle, nor affect on the service life of steel cylinder.It is more importantly the country
During thousands of LNG satellite stations for lacking BOG recovery gears, peak regulation station, LNGV liquid filling stations are runed, the BOG of generation is recycled
Efficient, economical and practical complete set of equipments is provided, is filled the domestic gaps.
Description of the drawings
Fig. 1 is the top view that the present invention reclaims that the bottled metal of BOG making high pressure cuts weldering gas equipment.
Fig. 2 is the front view that the present invention reclaims that the bottled metal of BOG making high pressure cuts weldering gas equipment.
Fig. 3 is the flow chart that the present invention reclaims that the bottled metal of BOG making high pressure cuts weldering gas method.
Specific embodiment
Below in conjunction with the accompanying drawings embodiments of the invention are described specifically：
Embodiment one
Reclaim the bottled metal of BOG making high pressure and cut weldering gas equipment, as depicted in figs. 1 and 2, including base 10 and prying body 20,
Prying body 20 is arranged on base 10, and base 10 is provided with BOG gas source inlets 11, relief valve floss hole 12 and sewage draining exit 13, prying body
Be provided with 20 air temperature type heating device 1, pressure regulation metering system 2, surge tank 3, accelerant loading system 4, natural gas compressor 5,
High-pressure gas cylinder group 6 and filling machine 7, the air inlet of air temperature type heating device 1 are connected with 11 pipeline of BOG gas source inlets, air temperature type liter
The source outlet of warm device 1 is connected with the air inlet of surge tank 3 through pressure regulation metering system 2, described accelerant loading system 4 with
The inlet of surge tank 3 connects, the gas outlet of surge tank 3 and connecting for natural gas compressor 5, the outlet of natural gas compressor 5
Mouth is divided into two-way, connects with filling machine 7 through high-pressure gas cylinder group 6 all the way, and another road is directly connected with filling machine 7, natural gas
Pipeline between compressor 5 and filling machine 7 is provided with valve 82, on the pipeline between natural gas compressor 5 and high-pressure gas cylinder group
Valve 83 is provided with, high-pressure gas cylinder group 6 is connected with filling machine 7 again, and the pipeline between high-pressure gas cylinder group 6 and filling machine 7 is provided with
Valve 81, both directly can carry out filling bottle using filling machine 7 from the gas out of natural gas compressor 5, it is also possible to first store up in high pressure
Store in gas cylinders group 6, when needed, recycle filling machine 7 to fill bottle.It is described air temperature type heating device 1, pressure regulation metering system 2, slow
Rush tank 3, accelerant loading system 4, natural gas compressor 5, high-pressure gas cylinder group 6 and filling machine 7 to be installed on base 10.
The swept volume of described surge tank 3 is 0.5m3, operating pressure is 1.6MPa..
Described accelerant loading system 4 includes accelerant storage tank 41, singlechip controller 43 and membrane pump 42, accelerant
Storage tank 41 is connected with membrane pump 42 built with rare earth accelerant, accelerant storage tank 41, and described membrane pump 42 is by Single-chip Controlling
Device 43 is controlled, and 42 0.2～0.76MPa of operating pressure of membrane pump, maximum output pressure 1.73MPa, one-stroke liquid volume added 2～
40mg/ time, 1～100 beat/min of frequency.
Described natural gas compressor 5 be DF-0.66/ (2-6) -250 model natural gas compressor, cylinder, interstage cooler
Air-cooled, few oil lubrication, drive mechanism pressure oil lubrication；0.2～0.6MPa of pressure of inspiration(Pi), pressure at expulsion 25.0MPa, capacity
115～275Nm3/ h, power of motor 45kW, soft start, PLC controls.
Described high-pressure gas cylinder group 6 includes two high-pressure gas cylinders 61, and the water capacity of single high-pressure gas cylinder 61 is
0.212m3, rated pressure 25.0MPa can make full use of not filling bottle or change bottle free time and inflate into high-pressure gas cylinder group 6,
A bottle efficiency is filled to improve using high-pressure gas cylinder group 6 when filling bottle, it is to avoid 5 frequent shutdown of natural gas compressor.
Described filling machine 7 is single rifle filling machine, and the rated pressure of single rifle filling machine is 25.0MPa.
Reclaim the bottled metal of BOG making high pressure and cut weldering gas method, as shown in figure 3, comprising the following steps：
(1) heat up：LNG tank cars gas outlet is connected with BOG gas source inlets 11, makes overbottom pressure in LNG tank cars be 0.3MPa's
BOG enters air temperature type heating device 1, is warming up to -20 DEG C through air temperature type heating device 1；
(2) voltage stabilizing：BOG after intensification is leaked into Jing after 2 pressure regulation of pressure regulation metering system is measured to 0.3MPa in surge tank 3 and is delayed
Punching, voltage stabilizing, in surge tank 3, gas pressure is 0.3MPa；
(3) activate：Accelerant loading system 4 singlechip controller 43 control under according to 6g V8 rare earth accelerants/
1Nm3The ratio of BOG pumps into the V8 rare earth accelerants in accelerant storage tank 41 in surge tank 3, adjusts natural gas compressor 5
Pressure of inspiration(Pi) is 0.3MPa, and capacity is 157Nm3The flow of/h, V8 rare earth fuel gain agent injection is 15.7g/min, and V8 is native
Fuel gain agent is sufficiently mixed, is catalyzed, is activated with the BOG in surge tank 3, is made BOG be converted into rare earth BOG metals and is cut weldering gas；
(4) it is pressurized, fills bottle：Rare earth BOG metals in surge tank 3 are cut weldering gas Jing natural gas compressors 5 to be compressed to
Store during high-pressure gas cylinder group 6 is filled with after 25.0MPa, be filled with high-pressure metal using single rifle filling machine 7 further according to needs and cut weldering gas
It is used as metal in bottle and cuts weldering gas, until it reaches high-pressure metal cuts rated pressure 20.0MPa of weldering gas cylinder.
Weldering gas cylinder is cut using the high-pressure metal of 120L, 20.0MPa, then per bottle can fill 2.38Nm3Rare earth BOG metals cut weldering
Gas, this equipment can fill 66 bottles of rare earth BOG metals per hour and cut weldering gas.
With the equipment of the present embodiment, " rare earth BOG metals cut weldering gas " made according to the method for the present embodiment is with " SQ is natural
Gas " property is identical, cuts the combustion gas consumed when steel billet, continuous casting plate, by volume, if need to be with the making of 1 volume the present embodiment
" rare earth BOG metals cut weldering gas ", just quite with the pure natural gas of 1.5～2.5 volumes, or the coke-stove gas of 4～6 volumes.Change speech
It, by annual 1.5 × 106m3Rare earth BOG metals cut weldering gas completed cut weldering workload computing, equivalent to 3.0 × 106m3
What methane or 1300 tons/acetylene or 1300 tons/propane were completed cuts weldering workload.
Assume 1 year to need 1.5 × 106m3Rare earth BOG metals cut weldering gas, its combustion-gas jet test cost and discharge carbon oxide amount with
Existing weldering gas of cutting is compared, as a result as shown in table 1：
The production cost and CO of 1 different combustion gas of table2Discharge capacity
| Combustion gas | Year gas consumption | Unit price | Total price (ten thousand yuan) | CO2Discharge capacity |
| Rare earth BOG metals cut weldering gas | 1.5×106m3 | 5.4 yuan of rice3 | 645 | 2948 tons |
| Methane | 3.0×106m3 | 3.3 yuan/meter3 | 990 | 5896 tons |
| Acetylene | 1300 tons | 25000 yuan of tons | 3250 | 4400 tons |
| Propane | 1300 tons | 7400 yuan of tons | 9620 | 3900 tons |
From table 1, cost after weldering gas being cut using rare earth BOG metals and being declined to a great extent, the discharge capacity of carbon dioxide is also significantly
Reduce, belong to the clean energy resource of low-carbon environment-friendly.And prove from a large amount of production practices, " rare earth BOG metals cut weldering gas " is to iron and steel class
Not there is no chemical reaction in burn into canister, not wall built-up, do not crystallize, deposit-free, do not block bottle neck, nor affect on steel cylinder
Service life.
" rare earth BOG metals cut weldering gas " that the present embodiment makes, can substitute completely acetylene carry out cutting, weld, roasting school and
Spraying, with preheating time is short, the advantage such as cutting, firing rate be fast.
Embodiment two
Reclaim the bottled metal of BOG making high pressure and cut weldering gas equipment, as depicted in figs. 1 and 2, including base 10 and prying body 20,
Prying body 20 is arranged on base 10, and base 10 is provided with BOG gas source inlets 11, relief valve floss hole 12 and sewage draining exit 13, prying body
Be provided with 20 air temperature type heating device 1, pressure regulation metering system 2, surge tank 3, accelerant loading system 4, natural gas compressor 5,
High-pressure gas cylinder group 6 and filling machine 7, the air inlet of air temperature type heating device 1 are connected with 11 pipeline of BOG gas source inlets, air temperature type liter
The source outlet of warm device 1 is connected with the air inlet of surge tank 3 through pressure regulation metering system 2, described accelerant loading system 4 with
The inlet of surge tank 3 connects, the gas outlet of surge tank 3 and connecting for natural gas compressor 5, the outlet of natural gas compressor 5
Mouth is divided into two-way, connects with filling machine 7 through high-pressure gas cylinder group 6 all the way, and another road is directly connected with filling machine 7, natural gas
Pipeline between compressor 5 and filling machine 7 is provided with valve 82, on the pipeline between natural gas compressor 5 and high-pressure gas cylinder group
Valve 83 is provided with, high-pressure gas cylinder group 6 is connected with filling machine 7 again, and the pipeline between high-pressure gas cylinder group 6 and filling machine 7 is provided with
Valve 81, both directly can carry out filling bottle using filling machine 7 from the gas out of natural gas compressor 5, it is also possible to first store up in high pressure
Store in gas cylinders group 6, when needed, recycle filling machine 7 to fill bottle.It is described air temperature type heating device 1, pressure regulation metering system 2, slow
Rush tank 3, accelerant loading system 4, natural gas compressor 5, high-pressure gas cylinder group 6 and filling machine 7 to be installed on base 10.
The swept volume of described surge tank 3 is 0.5m3, operating pressure is 1.6MPa..
Described accelerant loading system 4 includes accelerant storage tank 41, singlechip controller 43 and membrane pump 42, accelerant
Storage tank 41 is connected with membrane pump 42 built with rare earth accelerant, accelerant storage tank 41, and described membrane pump 42 is by Single-chip Controlling
Device 43 is controlled, and 42 0.2～0.76MPa of operating pressure of membrane pump, maximum output pressure 1.73MPa, one-stroke liquid volume added 20～
400mg/ time, 1～200 beat/min of frequency.
Described natural gas compressor 5 is VF-2/ (2-5) -250 model natural gas compressor, pressure of inspiration(Pi) 0.2～
0.5MPa, pressure at expulsion 25.0MPa, 357～712Nm of capacity3/ h, power of motor 132kW, soft start, PLC controls.
Described high-pressure gas cylinder group 6 includes two high-pressure gas cylinders 61, and the water capacity of single high-pressure gas cylinder 61 is
0.212m3, rated pressure 25.0MPa can make full use of not filling bottle or change bottle free time and inflate into high-pressure gas cylinder group 6,
A bottle efficiency is filled to improve using high-pressure gas cylinder group 6 when filling bottle, it is to avoid 5 frequent shutdown of natural gas compressor.
Described filling machine 7 is rush-harvesting and rush-planting filling machine, and the rated pressure of rush-harvesting and rush-planting filling machine is 25.0MPa.
Reclaim the bottled metal of BOG making high pressure and cut weldering gas method, as shown in figure 3, comprising the following steps：
(1) heat up：By the gas outlet of LNG satellite stations or peak regulation station tank discharge BOG be connected with BOG gas source inlets 11,
The BOG that admission pressure is controlled to 0.5MPa is entered into air temperature type heating device 1, -25 DEG C is warming up to through air temperature type heating device 1；
(2) voltage stabilizing：BOG after intensification is leaked in surge tank 3 Jing after 2 pressure regulation of pressure regulation metering system is measured to 0.5MPa and is delayed
Punching, voltage stabilizing, in surge tank 3, gas pressure is 0.5MPa；
(3) activate：Accelerant loading system 4 singlechip controller 43 control under according to 5g SQ-I rare earth accelerants/
1Nm3The ratio of BOG pumps into the SQ-I rare earth accelerants in accelerant storage tank 41 in surge tank 3, adjusts natural gas compressor 5
Pressure of inspiration(Pi) be 0.5MPa, capacity is 712Nm3The flow of/h, SQ-I rare earth fuel gain agent injection is 59.4g/min,
SQ-I rare earths fuel gain agent is sufficiently mixed, is catalyzed, is activated with the BOG in surge tank 3, is made BOG be converted into rare earth BOG metals and is cut
Weldering gas；
(4) it is pressurized, fills bottle：Rare earth BOG metals in surge tank 3 are cut weldering gas Jing natural gas compressors 5 to be compressed to
Be filled with after 25.0MPa in high-pressure gas cylinder group 6 and store, cut weldering gas further according to needing high-pressure metal to be filled with using rush-harvesting and rush-planting filling machine 7
It is used as metal in bottle and cuts weldering gas, until it reaches high-pressure metal cuts the rated pressure of weldering gas cylinder.Using 120L, 20.0MPa high pressure gold
Category cuts weldering gas cylinder, then per bottle can fill 2.38Nm3Rare earth BOG metals cut weldering gas, and this equipment can fill 299 bottles of rare earths per hour
BOG metals cut weldering gas.
Claims (6)
1. reclaim the bottled metal of BOG making high pressure and cut weldering gas equipment, including base and prying body, prying body is arranged on base, base
It is provided with BOG gas source inlets, it is characterised in that：Air temperature type heating device, pressure regulation metering system, surge tank, increasing are installed in prying body
Beneficial agent loading system, natural gas compressor, high-pressure gas cylinder group and filling machine, air inlet and the BOG sources of the gas of air temperature type heating device
Inlet pipeline connects, and the source outlet of air temperature type heating device is connected with the air inlet of surge tank through pressure regulation metering system, described
Accelerant loading system connect with the inlet pipeline of surge tank, the gas outlet of surge tank and connecting for natural gas compressor,
The gas outlet of natural gas compressor is divided into two-way, connects with filling machine through high-pressure gas cylinder group all the way, another road directly with plus
Mechanism of qi connects, described air temperature type heating device, pressure regulation metering system, accelerant loading system, surge tank, natural gas compressor,
High-pressure gas cylinder group and filling machine are installed on base.
2. recovery BOG according to claim 1 makes the bottled metal of high pressure and cuts weldering gas equipment, it is characterised in that：Described
Accelerant loading system is made up of accelerant storage tank, membrane pump and singlechip controller, and accelerant storage tank is built with rare earth gain
Agent, accelerant storage tank are connected with membrane pump, described membrane pump by singlechip controller control, membrane pump operating pressure 0.2～
0.76MPa, maximum output pressure 1.73MPa, one-stroke liquid volume added 20～400mg/ time, 1～200 beat/min of frequency.
3. recovery BOG according to claim 2 makes the bottled metal of high pressure and cuts weldering gas equipment, it is characterised in that：Described
The swept volume of surge tank is 0.5m3, operating pressure is 1.6MPa；The rated discharge pressure of described natural gas compressor is
25.0MPa；Described high-pressure gas cylinder group includes at least two high-pressure gas cylinders, and single high-pressure gas cylinder rated operating pressure is
25.0MPa；The rated pressure of described filling machine is 25.0MPa.
4. reclaim the bottled metal of BOG making high pressure and cut weldering gas method, it is characterised in that comprise the following steps：
(1) heat up：The gas outlet of LNG tank cars or storage tank is connected with BOG gas source inlets, makes the overbottom pressure in LNG storage tank or tank car be
The BOG of 0.3～1.0MPa enters air temperature type heating device, is warming up to -25～-15 DEG C through air temperature type heating device；
(2) voltage stabilizing：BOG after intensification leaks into buffering, voltage stabilizing in surge tank Jing after the metering of pressure regulation metering system pressure regulating；
(3) activate：Accelerant loading system is under singlechip controller control according to 4～7g rare earths accelerant/1Nm3The ratio of BOG
Example pumps into the rare earth accelerant in accelerant storage tank in surge tank, is sufficiently mixed, activates, is catalyzed with the BOG in surge tank, makes
BOG is converted into rare earth BOG metals and cuts weldering gas；
(4) it is pressurized, fills bottle：By the rare earth BOG metals in surge tank cut weldering gas Jing natural gas compressors be compressed to 20.0～
It is filled with high-pressure gas cylinder group after 25.0MPa, or is directly filled with high-pressure metal and cuts by filling machine and be used as metal in weldering gas cylinder and cut weldering
Gas.
5. recovery BOG according to claim 4 makes the bottled metal of high pressure and cuts weldering gas method, it is characterised in that：Described
The swept volume of surge tank is 0.5m3, operating pressure is 1.6MPa.
6. recovery BOG according to claim 4 makes the bottled metal of high pressure and cuts weldering gas method, it is characterised in that：Described
The rated pressure of high-pressure gas cylinder group is 25.0MPa.
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| CN201710011358.8A CN106513923A (en) | 2017-01-06 | 2017-01-06 | Device and method for preparing high-pressure bottled metal cutting and welding gas from recycled BOG |
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| CN201710011358.8A CN106513923A (en) | 2017-01-06 | 2017-01-06 | Device and method for preparing high-pressure bottled metal cutting and welding gas from recycled BOG |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111256975A (en) * | 2020-03-10 | 2020-06-09 | 郑州赛奥电子股份有限公司 | Device and method for checking opening time of pressure release valve |
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