CN207934947U - A kind of intelligentized small-sized cold energy generation device - Google Patents
A kind of intelligentized small-sized cold energy generation device Download PDFInfo
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- CN207934947U CN207934947U CN201820216952.0U CN201820216952U CN207934947U CN 207934947 U CN207934947 U CN 207934947U CN 201820216952 U CN201820216952 U CN 201820216952U CN 207934947 U CN207934947 U CN 207934947U
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- cold energy
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Abstract
The utility model discloses a kind of intelligentized small-sized cold energy generation devices, including LNG storage tank, the first shut-off valve, gasifier, pressure regulator valve, flowmeter, LNG cold energy transmission system, cold energy generation system and intelligence control system, the LNG cold energy transmission systems include that concatenation or side are connected on First Heat Exchanger on the main line；The cold energy generation system includes cryogenic pump, the second heat exchanger, expanding machine, generator, and the intelligence control system includes PLC, the first temperature, pressure transmitter, second temperature pressure transmitter, third temperature, pressure transmitter, temperature transmitter, methane on-line computing model and the solenoid valve being connected by circuit.The utility model is simple in structure, highly integrated, both can also can be used as escape truck when station power supply supplement or main pipeline failure as the remote electric power support without electric short of electricity satellite station；Safety automation degree is high, and power-assisted upgrades in energy industry, has good social benefit.
Description
Technical field
The utility model is related to LNG cold energy generations field, especially a kind of intelligentized small-sized cold energy generation device.
Background technology
As the clean fuel of low emission, LNG is the fastest-rising energy in the world today.According to Bp corporate statistics, 2015
Year, natural gas accounted for the 23.8% of primary energy consumption in the world, and China's whole year total quantity consumed increases by 4.7% compared with last year,
197.3 hundred million m3 of overall consumption.The LNG cold energy uses research in China starts from last century the nineties.Chen Guobang and Zhu Jianwen is first
The concept for proposing cold energy of liquefied natural gas afterwards provides detailed analysis, LNG for the LNG cold energy uses research in China in the future
With surrounding medium（Such as seawater, air and other phase-change materials）Between the temperature difference and pressure difference tend to balance during state
The energy obtained is known as LNG cold energy.But for weighing the important indicator of cold energy size.In recent years, China's natural gas
Notch is serious, and the ratio shared by imported L NG is higher and higher.Although China imported L NG is 30 years more late than the world, LNG is cold
The research of energy generation technology is later than the developed countries such as the Japanese U.S., but as China concentrates extensive introduction LNG, China
LNG cold energy generations are also substantially being developed using technology.
LNG cold energy is mainly used for cold energy generation, air separation, production dry ice, refrigeration, sea water desalination, ice making and low temperature powder
It is broken, but other application is relatively low for cold energy use other than cold energy generation.Domestic and foreign scholars are to LNG cold energy generation technologies
In-depth study is carried out, is used as evaluation method, and achieve certain application achievements.By sending out domestic and international LNG cold energy
The investigation of power technology document and practical application, at present the six of mainstream kind LNG cold energy generation technologies：Direct expansion method, Rankine follow
Around-France, combined cycle method, Brayton cycle method, card Linne round-robin method and multistage composite round-robin method.At present to LNG cold energy generations
Research has very much, cold energy generation technology in contrast comparative maturity, but to LNG cold energy generations midget plant and intelligentized control method
Research it is very few.
Patent CN105569752U discloses a kind of technique and device using cold energy generation, and downstream pipe network is supplied for vaporization
A large amount of cold energy is released during natural gas, is avoided cold energy recycling cold for generating electricity using two independent cycles
Loss of energy improves the economic benefit of enterprise, and the pollution problem that power plants generating electricity is brought is avoided while power generation, meets section
The requirement of energy environmental protection, but the device is not directed to a kind of intelligentized method processed.
Patent CN104989459 discloses a kind of intelligent natural gas pipe network pressure energy power generator, realizes storing up electricity system
System is utilized with the comprehensive high-efficiency of electricity generation system, and it is unattended to can also be achieved station factory, saves a large amount of manpowers, and ensure the peace of plant stand
Entirely, but gas-to electricity be LNG pressure can not be LNG cold energy.
Utility model content
The purpose of this utility model is that for the deficiency of LNG researchs existing at present presented above, one kind is disclosed
Small-sized cold energy generation device and intelligentized logic control method so that improving LNG cold energy use rates, improving cold energy generation amount
While, it is also simple to be easy to implement, and working medium propane is simple and easy to get, safety.
The technical solution adopted in the utility model is specially：
A kind of intelligentized small-sized cold energy generation device includes the LNG storages that downstream user is sequentially connected to by main line
Tank, the first shut-off valve, gasifier, pressure regulator valve, flowmeter further include LNG cold energy transmission system, cold energy generation system and intelligence control
System processed；
The LNG cold energy transmission systems include that concatenation or side are connected on First Heat Exchanger on the main line；
The cold energy generation system includes cryogenic pump, the second heat exchanger, expanding machine, generator, inside sets circulating refrigerant
The cryogenic pump, the second heat exchanger, expanding machine are sequentially connected First Heat Exchanger by pipeline and carry out cycle heat exchange, the expanding machine
Output end connect with generator drive；
The intelligence control system includes the PLC being connected by circuit, for obtaining refrigerant temperature at expander inlet
First temperature, pressure transmitter of degree pressure value, the second temperature pressure for obtaining refrigerant temperature pressure value at expander outlet
Transmitter, the third temperature, pressure transmitter for obtaining pressure regulator valve exit LNG temperature, pressure values exchange heat for obtaining first
The temperature transmitters of the LNG delivery outlet temperature values of device, methane on-line computing model and the LNG inputs in the First Heat Exchanger are set
The solenoid valve of mouth.
Further, expanding machine used is air motor, is connect with generator drive by connecting shaft.
Further, the First Heat Exchanger uses coil exchanger.
Further, the PLC10 uses siemens PLC series of PLC.
Further, the circulating refrigerant is propane.
Further, the generator is asynchronous generator, and model is YB3-205-2.
Further, second heat exchanger carries out forced heat-exchanging with air.
Further, the intelligence control system further includes the alarm system being connect with PLC circuit, for existing when methane
The methane concentration that line monitor is detected is more than or sends out alarm less than when corresponding to threshold value.
The utility model has advantageous effect below compared with the prior art and present situation：
1, the utility model disclosure satisfy that the premise of cold energy institute chilling requirement in the constant premise of refrigerant working condition or LNG
Under, this system allows LNG temperature that can have 30 DEG C or so of fluctuation, and the LNG of partial gasification amount is only taken to carry out cold energy generation,
The continued smooth for being conducive to the cold energy use project carries out, and cold energy generation project may be implemented start and stop at any time, pass through automatic control method
The working condition for monitoring each storage tank and pipeline at any time after arbitrary system is shut down, by the timely adjustment to upstream LNG stream amount, is protected
Card will not form other systems and interfere；
2, intellectualized operation may be implemented in the utility model, using PLC system carry out real time monitoring instrument data, and with report
Alert device connection, ensures the security context of plant stand, timely processing data feedback, can accomplish unattended, greatly reduces production
And human cost, improve plant stand income；
3, the seamless connection with original technique is realized：When operation with interrupting at any time（Even if when without electricity, left unguarded）, do
To seamless switching, ensures original system normal operation, and in electricity usage, floor space etc., accomplish to original station
Useful supplement；
4, the cold energy that the utility model generates LNG gasification is recycled for generating electricity, energy conservation and environmental protection, alleviates cold dirt
Dye, while generating certain economic benefit；The electric power sent out can surf the Internet, while solving the electrical problem of station itself
Nearby residents and industrial user can be given to power, when power failure also can be used as new power supply mode, be conducive to the distribution of electricity consumption industry
The development of the energy；When later stage carries out further cold energy optimization design, cold energy can be increased newly for air-conditioning, the project of ice making, thus
Harl, cold pollution problem are thoroughly solved, the utilization rate of cold energy is promoted to higher, carries out energy-saving and environment-friendly principles and policies.
Description of the drawings
Fig. 1 is the intelligentized small-sized cold energy generation principle of device schematic diagram of the utility model embodiment one.
In figure：1-LNG storage tanks；2- gasifiers；3- methane on-line computing models；4- First Heat Exchangers；5- cryogenic pumps；6- second
Heat exchanger；7- the first temperature, pressure transmitters；8- expanding machines；9- generators；10-PLC；11- solenoid valves；12- temperature transmitters；
The first shut-off valves of 13-；14- second temperature pressure transmitters；15- pressure regulator valves；16- third temperature, pressure transmitters；17- second is cut
Only valve.
Specific implementation mode
To more fully understand the utility model, the utility model is described in further detail with reference to the accompanying drawings and examples,
But the range of the requires of the utility model protection is not limited to the range of embodiment statement.
Embodiment one
Below by taking certain LNG satellite station as an example, which is 50000m3/d, supply gas pressure 0.4MPa.
As shown in Figure 1, a kind of intelligentized small-sized cold energy generation device, including downstream is sequentially connected to by main line and is used
The LNG storage tank 1 at family, the first shut-off valve 13, gasifier 2, pressure regulator valve 15, flowmeter further include LNG cold energy transmission system, cold energy
Electricity generation system and intelligence control system；
The LNG cold energy transmission systems include that concatenation or side are connected on First Heat Exchanger 4 on the main line, and described the
One heat exchanger 4 uses coil exchanger；
The cold energy generation system includes cryogenic pump 5, the second heat exchanger 6, expanding machine 8, generator 9, and it is cold inside to set cycle
The cryogenic pump 5 of matchmaker, the second heat exchanger 6, expanding machine 8 are sequentially connected First Heat Exchanger 4 by pipeline and carry out cycle heat exchange, institute
The second heat exchanger 6 and the air stated carry out forced heat-exchanging.The circulating refrigerant is propane.The output end of the expanding machine 8 with
Generator 9 is drivingly connected, and the generator 9 is asynchronous generator, and model is YB3-205-2；Expanding machine 8 used is pneumatic horse
It reaches, is connect with generator drive by connecting shaft；
The intelligence control system includes the PLC10 being connected by circuit, for obtaining 8 inlet refrigerant of expanding machine
First temperature, pressure transmitter 7 of temperature, pressure value, the second temperature for obtaining 8 exit refrigerant temperature pressure value of expanding machine
Pressure transmitter 14, the third temperature, pressure transmitter 16 for obtaining 15 exit LNG temperature, pressure values of pressure regulator valve, for obtaining
Take the temperature transmitter 12, methane on-line computing model 3 and setting of the LNG delivery outlet temperature values of First Heat Exchanger 4 described first
The solenoid valve 11 of the input ports LNG of heat exchanger 4.
The intelligence control system further includes the alarm system being connect with PLC10 circuits, when 3 institute of methane on-line computing model
When the methane concentration of detection is more than or is less than corresponding threshold value, PLC10, which sends out control instruction, makes alarm system send out alarm.
The pressure regulator valve 15 not only has the function of shut-off valve, can also adjust it is grid-connected after pressure, realize the seamless rank of pipe network
It connects.
The intelligentized small-sized cold energy generation device of one kind of the present embodiment is highly integrated, and linking is close, required for covering
Equipment, be easy to install and maintain, be suitable for small low-voltage process conditions.
The operation principle of the intelligentized small-sized cold energy generation device is：
Open system, solenoid valve 11 open LNG cold energy transmission systems, and LNG enters LNG cold energy transmission systems, and described is cold
Energy electricity generation system and LNG cold energy transmission systems generate electricity after exchanging heat；
PLC10 obtains the first temperature, pressure transmitter 7, second temperature pressure transmitter 14, third temperature, pressure and passes in real time
The registration of sensor 16 and temperature transmitter 12；
When the registration of temperature transmitter 12 is more than -132 DEG C, solenoid valve 11 is closed, and cut-out LNG cold energy transmits, and stops hair
Electricity ensures the normal operation of main line.
Specifically, in system operation, by controlling the cryogenic pump 5, the second heat exchanger 6 adjusts the first temperature
Temperature, pressure at pressure transmitter 7 realize the variation of 9 generated energy of the generator, such as the rotating speed tune by changing cryogenic pump 5
The pressure for saving circulating refrigerant, it is described by changing the temperature of the second heat exchanger 6 and the forced heat-exchanging rate adjustment circulating refrigerant of air
The variation range of generated energy is 15-25%.
Above-described embodiment uses Rankine cycle-direct expansion combination method, LNG out to enter First Heat Exchanger from LNG storage tank 1
Exchange heat gasification in 4, the refrigerant of Rankine cycle is cooled down condensation, then LNG imports manifold, through pressure regulator valve 15 and flowmeter pressure regulation meter
Downstream user is conveyed to after amount；Circulating refrigerant enters expanding machine 8 in the second heat exchanger 6 after air forced heat-exchanging, drive power generation
Machine 9 generates electricity, and returns First Heat Exchanger 4 and is recycled, realizes the transmission of cold energy.Above-described embodiment selects propane as circulation industrial
Matter, evaporating pressure 0.11MPa, evaporating temperature are 5 DEG C；Condensing pressure is 0.7MPa, and condensation temperature is -20 DEG C.So LNG
Pressure into First Heat Exchanger is 4MPa, and inlet temperature is about -162 DEG C, and outlet temperature control is -132 DEG C or so, design
The mass flow of LNG is 15000kg/hr, and the mass flow of circulating refrigerant is 3000kg/hr.LNG evaporator thermic load is
400KW, Rankine cycle evaporator thermic load are 430KW.
The outer defeated electric power 20KW of net power generation of above-described embodiment, night can also run, and reach best in summer generating effect,
Season in severe winter, which is contemplated that, shuts down or maintains power generation using other measures.It was calculated according to 8500 hours within 1 year, wherein 7000 hours can
It is exported completely, electric power always output is 140,000 kWh, and it is reachable to calculate income according to 0.8 yuan/kWh general industry electricity rates
11.2 ten thousand yuan.
Above-described embodiment of the utility model is only intended to clearly illustrate the utility model example, and is not
Restriction to the embodiment of the utility model.For those of ordinary skill in the art, on the basis of above description
On can also make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.
All any modification, equivalent and improvement made within the spirit and principle of the present invention etc., should be included in this reality
Within novel scope of the claims.
Claims (8)
1. a kind of intelligentized small-sized cold energy generation device, includes the LNG storage tank for being sequentially connected to downstream user by main line
（1）, the first shut-off valve（13）, gasifier（2）, pressure regulator valve（15）, flowmeter, it is characterised in that：Further include that LNG cold energy transmits system
System, cold energy generation system and intelligence control system；
The LNG cold energy transmission systems include that concatenation or side are connected on First Heat Exchanger on the main line（4）；
The cold energy generation system includes cryogenic pump（5）, the second heat exchanger（6）, expanding machine（8）, generator（9）, inside set and follow
The cryogenic pump of ring refrigerant（5）, the second heat exchanger（6）, expanding machine（8）It is sequentially connected First Heat Exchanger by pipeline（4）Into
Row cycle heat exchange, the expanding machine（8）Output end and generator（9）It is drivingly connected；
The intelligence control system includes the PLC being connected by circuit（10）, for obtaining expanding machine（8）Inlet refrigerant
First temperature, pressure transmitter of temperature, pressure value（7）, for obtaining expanding machine（8）The second of exit refrigerant temperature pressure value
Temperature, pressure transmitter（14）, for obtaining pressure regulator valve（15）The third temperature, pressure transmitter of exit LNG temperature, pressure values
（16）, for obtaining First Heat Exchanger（4）LNG delivery outlet temperature values temperature transmitter（12）, methane on-line computing model（3）
With setting in the First Heat Exchanger（4）The input ports LNG solenoid valve（11）.
2. the intelligentized small-sized cold energy generation device of one kind according to claim 1, it is characterised in that：Expanding machine used
（8）For air motor, it is connect with generator drive by connecting shaft.
3. the intelligentized small-sized cold energy generation device of one kind according to claim 1, it is characterised in that：Described first is changed
Hot device（4）Using coil exchanger.
4. the intelligentized small-sized cold energy generation device of one kind according to claim 1, it is characterised in that：The PLC
（10）Using siemens PLC series of PLC.
5. according to claim（1）The intelligentized small-sized cold energy generation device of one kind, it is characterised in that：The cycle
Refrigerant is propane.
6. the intelligentized small-sized cold energy generation device of one kind according to claim 1, it is characterised in that：The generator
（9）For asynchronous generator, model is YB3-205-2.
7. the intelligentized small-sized cold energy generation device of one kind according to claim 1, it is characterised in that：Described second is changed
Hot device（6）Forced heat-exchanging is carried out with air.
8. the intelligentized small-sized cold energy generation device of one kind according to claim 1, it is characterised in that：The intelligence control
System processed further includes the alarm system being connect with PLC circuit, for working as methane on-line computing model（3）The methane concentration detected is big
Alarm is sent out when corresponding threshold value.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820216952.0U CN207934947U (en) | 2018-02-07 | 2018-02-07 | A kind of intelligentized small-sized cold energy generation device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820216952.0U CN207934947U (en) | 2018-02-07 | 2018-02-07 | A kind of intelligentized small-sized cold energy generation device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108252759A (en) * | 2018-02-07 | 2018-07-06 | 广州莱仑特种装备有限公司 | A kind of intelligentized small-sized cold energy generation device and its control method |
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2018
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108252759A (en) * | 2018-02-07 | 2018-07-06 | 广州莱仑特种装备有限公司 | A kind of intelligentized small-sized cold energy generation device and its control method |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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| CF01 | Termination of patent right due to non-payment of annual fee |