CN107246550B - Natural gas expander independence regulator and method - Google Patents
Natural gas expander independence regulator and method Download PDFInfo
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- CN107246550B CN107246550B CN201710485901.8A CN201710485901A CN107246550B CN 107246550 B CN107246550 B CN 107246550B CN 201710485901 A CN201710485901 A CN 201710485901A CN 107246550 B CN107246550 B CN 107246550B
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- pressure
- central controller
- generator
- pressure sensor
- natural gas
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 226
- 239000003345 natural gas Substances 0.000 title claims abstract description 113
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000033228 biological regulation Effects 0.000 claims abstract description 21
- 238000012544 monitoring process Methods 0.000 claims abstract description 16
- 230000005540 biological transmission Effects 0.000 claims abstract description 14
- 238000011084 recovery Methods 0.000 claims abstract description 14
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 6
- 230000006837 decompression Effects 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 70
- 238000001514 detection method Methods 0.000 claims description 41
- 239000000446 fuel Substances 0.000 claims description 17
- 230000005284 excitation Effects 0.000 claims description 14
- 239000000523 sample Substances 0.000 claims description 10
- 230000007423 decrease Effects 0.000 claims description 4
- 230000009467 reduction Effects 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000004064 recycling Methods 0.000 abstract description 10
- 230000001105 regulatory effect Effects 0.000 abstract description 7
- 230000008859 change Effects 0.000 description 10
- 230000008569 process Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004320 controlled atmosphere Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000003752 improving hair Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
- F17D1/04—Pipe-line systems for gases or vapours for distribution of gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
- F01K13/02—Controlling, e.g. stopping or starting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The present invention relates to natural gas pressure regulating and pressure energy recycling field, a kind of high-precision Natural gas expander independence regulator and method are specifically provided.Device therein includes: natural gas system, and the natural gas being used in the high pressure pipe network to upstream be depressured and pressure recovery energy, and the natural gas for that will be depressured and after pressure recovery energy leads to the low-pressure pipe network in downstream；Regulator control system comprising central controller, the central controller are used to adjust corresponding parameter during the decompression and pressure recovery energy；And monitoring client, it is used to receive the data of the central controller transmission, and for sending the request for reading data to the central controller.Regulator and method of the invention is the high-precision pressure regulation for realizing natural gas without pressure regulator valve, merely with independent expanding machine while the pressure to natural gas can be carried out recycling.
Description
Technical field
The present invention relates to natural gas pressure regulating and pressure energy recycling fields, and in particular to a kind of high-precision natural gas expansion
Machine independence regulator and method.
Background technique
As what natural gas was applied in exhausting and various industrial circles further popularizes, the consumption of China's natural gas
Amount is rendered obvious by out raised trend year by year, and the gas consumption total amount in China in 2016 has broken through 200,000,000,000 m3.High pressure pipe network
Natural gas enter user terminal (resident or industrial user) before, need to will be delivered to city from through long-distance transport pipes first
Town pipe network (low-pressure pipe network).In this transmission process, the pressure of natural gas is adjusted step by step from the pressure of 6MPa even 10MPa or more
Pressure (reduces pressure), pressure needed for being finally reached user terminal.Currently, the natural gas of high pressure pipe network output generallys use throttle type
Pressure regulator valve carries out pressure regulation, therefore the pressure energy of high-pressure natural gas is not fully used.
In order to which the pressure to natural gas can be carried out recycling, as patent application (CN 104989459A) discloses a kind of intelligence
Change natural gas pipe network pressure energy power generator, which mainly utilizes expanding machine in parallel with existing pressure regulator to natural gas
Pressure energy is recycled and is generated electricity, so that pressure energy be recycled and be converted into electric energy.But due to the device must pressure regulator with
The purpose to generate electricity while being just able to achieve pressure regulation in the case of expanding machine is in parallel, thus the initial investment of device entirety it is at high cost,
It is low that pressure energy of natural gas recycles ability.
The problem of pressure regulation and pressure energy recycling that natural gas just can be achieved must and be deposited in view of pressure regulator and expanding machine, application
The patent application (CN 105401990A) that people formerly submits also discloses a kind of pressure energy of natural gas power generation regulator and side
Method, device therein directly can carry out pressure regulation to natural gas using expanding machine.But, the heating system of the device is relatively multiple
It is miscellaneous, heat source is required relatively high, and the accuracy of pressure regulation needs to be further increased, and using the device to natural gas into
During row pressure regulation, have the defects that the pressure oscillation of expander outlet is big.
Summary of the invention
Technical problem
In view of this, the present invention provides a kind of Natural gas expander independence regulator and method, it is intended to realize to natural
The pressure of gas can be carried out the high-precision pressure regulation for realizing natural gas while recycling using independently-inflatable machine.
Technical solution
In order to solve the above-mentioned technical problem, a kind of Natural gas expander independence pressure regulation dress is provided according to an aspect of the present invention
It sets, which includes:
Natural gas system, the natural gas being used in the high pressure pipe network to upstream be depressured and pressure recovery energy, and
Natural gas for that will be depressured and after pressure recovery energy leads to the low-pressure pipe network in downstream；
Regulator control system comprising central controller, the central controller are used to adjust during the decompression and pressure recovery energy
Whole corresponding parameter；And
Monitoring client, is used to receive the data of the central controller transmission, and reads number for sending to the central controller
According to request.
For above-mentioned Natural gas expander independence regulator, in one possible implementation, the natural gas system
System includes heater, expanding machine and surge tank；Wherein:
The gas inlet of the heater is connected to the high pressure pipe network, the right gas outlet of the heater with it is described swollen
The gas inlet of swollen machine is connected, and the gas outlet of the expanding machine is connected with the gas inlet of the surge tank,
The gas outlet of the surge tank is connected to the low-pressure pipe network；
The natural gas system further includes generator, and the generator is connected with the expanding machine.
For above-mentioned Natural gas expander independence regulator, in one possible implementation, the generator is logical
It crosses power supply line to be electrically connected with the central controller, for providing electric energy to the central controller.
For above-mentioned Natural gas expander independence regulator, in one possible implementation, the natural gas system
System further includes pressure regulator valve, and the second gas inlet of the heater is connected to the fuel pipe network that can obtain preheating fuel,
The pressure regulator valve is set between second gas inlet and the fuel pipe network,
Wherein, the fuel pipe network is high pressure pipe network or low-pressure pipe network.
For above-mentioned Natural gas expander independence regulator, in one possible implementation, the regulator control system
Further include the temperature sensor being respectively connected with the central controller by signal cable, speed probe, pressure sensor group and
Valve group, and
The central controller also passes through signal cable and is connected with the generator, and the central controller is according to the pressure sensing
The pressure signal of device group transmission adjusts the revolving speed of the generator.
For above-mentioned Natural gas expander independence regulator, in one possible implementation,
The temperature sensor is set between the gas outlet of heater and the gas inlet of the expanding machine, institute
It states the temperature of the natural gas in gas outlet downstream of the temperature sensor for detecting heater and sends temperature signal to institute
State central controller；
The speed probe is set to the expanding machine, the generator or between the two, the speed probe
For detecting the revolving speed of the generator or the expanding machine and sending tach signal to the central controller；And
The pressure sensor group includes first pressure sensor and second pressure sensor, in which:
The first pressure sensor is set on surge tank, and the first pressure sensor is for detecting in surge tank
Gas pressure simultaneously sends pressure signal to the central controller；
The second pressure sensor is set between second valve and low-pressure pipe network, the second pressure sensor
For detecting the gas pressure for leading to low-pressure pipe network.
For above-mentioned Natural gas expander independence regulator, in one possible implementation, the valve group packet
It includes:
First valve, be set to the pressure regulator valve gas outlet and the heater the second gas inlet it
Between, the central controller can adjust the aperture of first valve according to the temperature signal temperature that the temperature sensor transmits；
Second valve is set between the surge tank and the low-pressure pipe network, and the central controller can adjust described
The aperture of second valve.
For above-mentioned Natural gas expander independence regulator, in one possible implementation, the central controller is also
Judge that natural gas pressure regulating device whether there is failure for the parameter according to acquisition, and
In the natural gas pressure regulating device there are in the case of failure, the central controller sends failure letter to the monitoring client
Breath and/or alerting signal relevant to fault message.
In order to solve the above-mentioned technical problem, it is independent that a kind of Natural gas expander is additionally provided according to another aspect of the present invention
Pressure regulation method, this method includes the steps that the step of adjusting temperature and set-pressure, and the step of set-pressure is
It is carried out under the premise of completing the step of adjusting temperature；
Wherein, the step of adjusting temperature are as follows: according to the day of the gas outlet of the heater of temperature sensor detection
The temperature of right gas, central controller by adjusting the first valve opening mode so that the temperature of natural gas reaches and stablizes in described
Control the temperature levels of device setting；
Wherein, the step of set-pressure are as follows: the revolving speed based on expanding machine, central controller according to first pressure sensor and
The surge tank of second pressure sensor detection and the pressure of low-pressure pipe network upstream, are controlled logical to change by the revolving speed to generator
The pressure for the natural gas for entering the flow of the natural gas of expanding machine, and then detecting first pressure sensor and second pressure sensor
Reach and stablizes the stress level set to central controller.
For above-mentioned Natural gas expander independence pressure regulation method, in one possible implementation, the set-pressure
The step of specifically include:
1) in the case of expanding machine is less than the maximum permissible revolution of setting, according to first pressure sensor and second pressure
The pressure of sensor detection carries out pressure setting control below:
11) when pressure first pressure sensor detection lower than the stress level set of second pressure sensor detection
Pressure when being in the stress level of setting, central controller sends the exciting current for improving generator to the excitation module of generator
Signal increases the revolving speed of expanding machine also to improve the revolving speed of generator, until first pressure sensor transmission
Pressure signal reaches the first object state of the first preset value of stress level higher than setting, then follows the steps below control
System:
111) if the pressure of second pressure sensor detection persistently reduces, central controller can be further to generator transmission
The signal of the revolving speed of generator is improved, the revolving speed of expanding machine also further increases therewith, until the detection of second pressure sensor
Pressure bottom out；
112) if the pressure bottom out of second pressure sensor detection, central controller can reduce hair to generator transmission
The signal of the revolving speed of motor, the revolving speed of expanding machine also further decrease therewith, until the pressure of second pressure sensor detection is opened
Begin to reduce；
Central controller receive and according to above-mentioned steps 111) and 112) principle circulation adjust second pressure sensor detect
The pressure of natural gas, until the pressure of second pressure sensor detection reaches and stablizes to the stress level of setting；
12) when the pressure signal of second pressure sensor detection is higher than the stress level of setting, central controller is to generator
Excitation module send and reduce the signal of the exciting current of generator to reduce the revolving speed of generator, the revolving speed of expanding machine is also therewith
It reduces, until the pressure of second pressure sensor detection reaches the second target-like of the second preset value of stress level higher than setting
State；
13) when stress level of the pressure of first pressure sensor detection lower than setting, central controller is encouraged to generator
Magnetic module sends the signal of the exciting current of raising generator to improve the revolving speed of generator, and the revolving speed of expanding machine is also slow therewith
It increases, until the pressure of first pressure sensor detection reaches and stablizes to the stress level of setting；
2) it in the case of the revolving speed of expanding machine is more than or equal to the maximum permissible revolution of setting, is then sensed according to first pressure
Device and the pressure of second pressure sensor detection carry out following corresponding adjusting control:
21) when the pressure that first pressure sensor and second pressure sensor detect is above the stress level of setting,
Then central controller is according to above-mentioned steps 12) carry out pressure adjustment, i.e. central controller passes second pressure by reducing the revolving speed of generator
The pressure of sensor detection reaches the third dbjective state of the stress level third preset value higher than setting；
22) when pressure of the pressure of one of detection in first pressure sensor and second pressure sensor lower than setting
When power level, then central controller sends the exciting current signal for improving generator to the excitation module of generator to improve generator
On the one hand revolving speed makes generator and expanding machine keep maximum permissible revolution operating, while central controller sends maximum supply to monitoring client
The insufficient standby signal of tolerance；
Central controller receive and according to above-mentioned steps 21) and 22) principle circulation adjust first pressure sensor and second press
The pressure of the natural gas of force snesor detection, until the pressure signal that first pressure sensor and second pressure sensor transmit reaches
To and stablize to the stress level of setting.
Beneficial effect
Gas transmission in Natural gas expander independence regulator of the invention, when due to expanding machine rotation for each revolution
The flow of body is fixed, thus make expanding machine revolving speed and conveying gas flow at stringent linear relationship, therefore it is of the invention
The mode that regulator controls the revolving speed of generator by using exciting current keeps the control of revolving speed more accurate, so as to
Realize the high-precision adjusting and the abundant recycling of the pressure energy to natural gas to the pressure of natural gas.
Also, the fluctuation for the gas pressure that regulator of the invention reduces expander outlet by surge tank is shaken
Width.Specifically, when the natural gas dosage of the user terminal due to downstream increases and makes the pressure drop of the natural gas of low-pressure pipe network
When low, compared with directly by way of improving the revolving speed of expanding machine (revolving speed gradually rises), pass through the day stored in surge tank
Right gas can not only quickly supplement the natural gas dosage of user terminal, and reduce the decline of the gas pressure of low-pressure pipe network
Degree, and then make the gas pressure fast and stable of low-pressure pipe network to the stress level of setting, so expander outlet
Gas pressure can be chronically at the state of short arc fluctuation.Similarly, in the natural gas dosage of the user terminal due to downstream
When reducing and increasing the gas pressure of low-pressure pipe network, surge tank can store expanding machine in deceleration (revolving speed gradually decreases) mistake
Extra natural gas in journey, to reduce the elevated-levels of the gas pressure of downstream pipe network, and then makes low-pressure pipe network
Gas pressure fast and stable is to the stress level of setting, and so the gas pressure of expander outlet can be chronically at
The state of short arc fluctuation.
In addition, by using by the natural gas after pressure regulation (come from high pressure pipe network) or pressure regulation (from low-pressure pipe network) as
The fuel of heater, so that regulator of the invention reduces the limitation of geographical conditions in application process.Pass through tune simultaneously
The communication of pressure device and monitoring client realizes the real time monitoring to device operating status.
Moreover, regulator of the invention has the advantages that structure is simple, easy to use, it can be used for the combustion of large, medium and small type
Controlled atmosphere presses application scenarios, be particularly suitable for having high-precision natural gas pressure regulating, remote be unable to supply the medium-and-large-sized natural of alternating current
Gas voltage regulating station.
According to below with reference to the accompanying drawings becoming to detailed description of illustrative embodiments, other feature of the invention and aspect
It is clear.
Detailed description of the invention
Comprising in the description and constitute the attached drawing of part of specification and specification together illustrate it is of the invention
Exemplary embodiment, feature and aspect, and principle for explaining the present invention.It when considered in conjunction with the accompanying drawings, can be more complete
More fully understand the present invention.The drawings described herein are used to provide a further understanding of the present invention, embodiment and its explanation
It is used to explain the present invention, does not constitute improper limitations of the present invention.
Fig. 1 shows the structural schematic diagram (pressure regulator valve of the Natural gas expander independence regulator of an embodiment of the present invention
The natural gas as heater fuel is drawn from the high pressure pipe network of upstream)；
Fig. 2 shows the structural schematic diagram (pressure regulation of the Natural gas expander independence regulator of another embodiment of the invention
Valve draws the natural gas as heater fuel from the low-pressure pipe network in downstream).
Reference signs list
10, heater；11, pressure regulator valve；12, expanding machine；13, excitation generator；14, surge tank；20, central controller；21,
One valve；22, temperature sensor；23, speed probe；24, first pressure sensor；25, the second valve；26, second pressure
Sensor.
Specific embodiment
Below with reference to attached drawing various exemplary embodiments, feature and the aspect that the present invention will be described in detail.It is identical in attached drawing
Appended drawing reference indicate element functionally identical or similar.Although the various aspects of embodiment are shown in the attached drawings, remove
It non-specifically points out, it is not necessary to attached drawing drawn to scale.
Dedicated word " exemplary " means " being used as example, embodiment or illustrative " herein.Here as " exemplary "
Illustrated any embodiment should not necessarily be construed as preferred or advantageous over other embodiments.
It should be noted that in the description of the present invention unless specifically defined or limited otherwise, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.To those skilled in the art, it can understand that above-mentioned term is practical at this as the case may be
Concrete meaning in novel.
In addition, in order to better illustrate the present invention, numerous details is given in specific embodiment below.
It will be appreciated by those skilled in the art that without certain details, the present invention equally be can be implemented.In some instances, for
Method, means, element and circuit well known to those skilled in the art are not described in detail, in order to highlight purport of the invention.
Embodiment 1
The structural schematic diagram of the Natural gas expander independence regulator of an embodiment of the present invention as shown in figure 1.Such as Fig. 1
Shown, the device mainly includes natural gas system and regulator control system, natural gas system is mainly used for will be natural in high pressure pipe network
Gas decompression and pressure recovery can reach later and can lead to low-pressure pipe network and then lead to the level of user terminal, and regulator control system is then
The natural of low-pressure pipe network is led in parameter during being mainly used for by adjusting " being depressured simultaneously pressure recovery energy " above-mentioned, optimization
The level of gas, and improve pressure energy recovery levels.
With continued reference to Fig. 1, natural gas system mainly include heater 10, pressure regulator valve 11, expanding machine 12, generator 13 and
Surge tank 14.Wherein:
The pipeline of first gas inlet of heater 10 and high pressure pipe network connects, the gas outlet of heater 10 with it is swollen
The gas inlet of swollen machine 12 is connected, and the gas outlet of expanding machine 12 is connected with the gas inlet of surge tank 14, delays
The gas outlet for rushing tank 14 is connected to the pipeline of low-pressure pipe network.Natural gas successively heated 10 pre-add of device of high pressure pipe network output
After heat, 12 pressure recovery energy of expanding machine, it can be temporarily stored in surge tank 14 or directly by the natural gas of surge tank 14
Outlet passes to the pipeline of low-pressure pipe network.
The entrance of pressure regulator valve 11 and the pipeline of high pressure pipe network connect, and the outlet of pressure regulator valve 11 is connected to the second of heater 10
Gas inlet is mainly used for be passed through the preheating of the natural gas of heater 10 by the first gas inlet and providing fuel.
Since preheating fuel is high-pressure natural gas, preheating efficiency is improved, this arrangement is more suitable for requiring pre-
The application scenarios that heating density is concentrated and the preheating temperature difference is big.
Expanding machine 12 is connect by shaft coupling with generator 13, and the recycling of pressure energy is mainly used for.Specifically, heater
The natural gas of gas outlet output push expanding machine 12 to rotate, pressure energy is converted into mechanical energy, expanding machine 12 rotates band
The dynamic rotation of generator 13 power generation, to convert mechanical energy into electric energy.Preferably, generator 13 is excitation generator, by encouraging
The exciting current that magnetic module adjusts generator is the revolving speed that generator 13 can be changed, and is adjusted by the change of the revolving speed of generator 13
The revolving speed of whole expanding machine, to change the flow of the natural gas by expanding machine 12, the change of the flow combines the user in downstream
The demand of the natural gas of terminal can make the change of the pressure into the natural gas of surge tank 14.
Referring still to Fig. 1, regulator control system mainly includes central controller 20 and passes through signal cable difference electricity with central controller 20
Speed probe 23, valve group (the first valve 21, the second valve 25) and the sensor group (temperature sensor 22, first of connection
Pressure sensor 24, second pressure sensor 26).Central controller 20 is also electrically connected by signal cable with generator 13, by right
The revolving speed of generator 13 is adjusted, without can be realized in throttle type pressure regulator valve, only by individual expanding machine to day
The pressure of right gas adjusts and pressure energy recycling.Wherein:
Temperature sensor 22 is set to the pipe between the gas outlet of heater 10 and the gas inlet of expanding machine 12
Road sends central controller 20 to mainly for detection of the natural gas temperature after preheating and by temperature signal.
First pressure sensor 24 is set on surge tank 14, and first pressure sensor 24 is mainly for detection of surge tank 14
Interior gas pressure simultaneously sends pressure signal to central controller 20；Second pressure sensor 26 be set to the second valve 25 with it is low
On pipeline between pressure pipe net, second pressure sensor 26 is mainly for detection of the gas pressure for leading to low-pressure pipe network.
First valve 21 is set to the pipeline of the gas outlet of pressure regulator valve 11 and the second gas inlet of heater 10
Between, central controller 20 adjusts the aperture of the first valve 21 according to the temperature signal that temperature sensor 22 transmits, and then change into
Enter the amount of the natural gas as preheating fuel of heater 10；Second valve 26 is set to the pipe of surge tank 14 and low-pressure pipe network
Between road, central controller 20 is changed into low-pressure pipe network by changing the aperture of the second valve 26 for passing to user's end
The total amount of fuel at end.Such as in the gas consumption for unsaturated vapor, user terminal very small (even zero) or the system failure, middle control
Device 20 reduces the aperture of the second valve 26, but the pressure in the surge tank 14 that first pressure sensor 24 detects at this time will increase
Add, in order to guarantee the stress level that sets still in central controller of pressure that first pressure sensor 24 detects, is necessarily required to pass through
Central controller 20 reduces the exciting current of generator 13 so that the revolving speed of expanding machine 12 reduces and then reduces the day for being passed through expanding machine 12
The flow of right gas.
Speed probe 23 such as can be set in generator 13, mainly for detection of generator 13 revolving speed and revolving speed is believed
Number send central controller 20 to.Due between expanding machine 12 and generator 13 being connected by shaft coupling, revolving speed is passed herein
The revolving speed that sensor 23 measures can be used to describe simultaneously the revolving speed of the two.Specific installation site can be flexible according to practical situation
Setting, the shaft coupling that can also be such as set to speed probe 23 between expanding machine 12 or expanding machine 12 and generator 13
On.
In addition, regulator of the invention further includes the middle control of regulator control system with the monitoring client of 20 both-way communication of central controller
Device 20 can communicate and transmitted to monitor aforementioned in real time or every certain time interval (such as 1 minute) with monitoring client
Collected temperature, pressure and/or tach signal.And central controller 20 can also receive monitoring client at any time and read asking for data
It asks, to realize reading of the monitoring client to data in central controller.In addition, central controller 20 can also by temperature above-mentioned, pressure and/
Or tach signal judges that regulator with the presence or absence of failure, and determines in the case of there are failure fault type and to prison
It controls end and sends corresponding fault type, fault message relevant to fault type and/or alerting signal relevant with fault type
(such as alarm signal of sound and/or light form).
As monitoring client can be physical server perhaps cloud server physical server can be it is nearest or long-range
Monitoring center, the concentration of the related data of regulator is received by monitoring client, processing and is sent, realizes and exchanges press fitting
The real-time monitoring set timely learning and can take corresponding troubleshooting strategy in the case of regulator breaks down, thus
Improve the service performance of regulator entirety.
Preferably, expanding machine 12 selects single-screw expander, and the first valve 21 selects regulating valve, and the second valve 25, which is selected, to be cut
Only valve, temperature sensor 22 are the temperature-sensitive element selection platinum resistance of thermocouple or thermistor and thermistor, revolution speed sensing
Device 23 selects non-contacting installation form, and heater 10 selects water-bath heater.
Preferably, generator 13 is also connected by power supply line with central controller 20, so as to the electric energy for generating generator 13
Electric energy is provided for central controller 20 after rectified/inversion, to realize self power generation preferentially from the purpose used.Further, it is also possible to
Generator 13 is set to provide the electricity consumptions such as relevant illumination, heating, air-conditioning nearby, later just by extra electrical energy transportation into power grid.
The distribution facility of application scenarios locating for device and device is omitted in such scheme of electric power, reduces electrical energy transportation generation
Energy consumption improves the utilization rate of electric energy on the basis of optimizing electric energy and recycling.Central controller 20 can be further attached thereto
First valve 21, the second valve 25, temperature sensor 22, first pressure sensor 24 and second pressure sensor 26 etc. provide
Electric energy.
Central controller 20 mainly according in the natural gas temperature in 10 downstream of heater above-mentioned, surge tank 14 pressure, second
The gas pressure in 25 downstream of valve, generator 13 revolving speed adjust the temperature, pressure and flow of natural gas.It is specific to adjust
Mode is referring to Natural gas expander independence pressure regulation method below.
The present invention also provides a kind of Natural gas expander independence pressure regulation method, the realization processes of independent pressure regulation method are as follows:
Central controller 20 is main to be adjusted control using serials control come temperature, pressure and the flow to natural gas.As a preference,
In serials control, the control about natural gas temperature is as sub-control circuit, and the control about pressure is then used as main control
Circuit, using the two step Tunings for carrying out pressure adjustment on the basis of guaranteeing that temperature substantially conforms to condition, low pressure is led in optimization
(temperature, the pressure) of the natural gas of pipe network is horizontal, improves the pressure energy recovery levels of natural gas.The pressure regulation method specifically includes that
The step of S100, adjusting temperature, the realization process of the step are as follows: what central controller 20 was transmitted by temperature sensor 22
Temperature signal, to the first valve 21 send adjustment instruction, by adjusting the first valve 21 aperture mode so as to pass through temperature
The temperature for the natural gas that sensor 22 detects reaches and stablizes the temperature levels set to central controller 20.
Specifically, when temperature sensor 22 transmit temperature signal lower than setting temperature levels when, central controller 20 to
First valve 21 send increase the first valve aperture instruction, such as increased in a manner of being gradually increased 21 aperture of the first valve into
Enter the amount of the natural gas as preheating fuel of heater, and when the temperature signal that temperature sensor 22 transmits is higher than setting
Temperature levels when, central controller 20 then to the first valve 21 send reduce the first valve 21 aperture instruction.Central controller 20 can
To receive in real time or every certain time interval (such as 1 minute) and adjust temperature sensing according to above-mentioned Adjustment principle circulation
The temperature of the natural gas of position is arranged in device, until the temperature signal that temperature sensor 22 transmits reaches and stablizes to the temperature of setting
When horizontal, central controller 20 no longer sends the instruction for adjusting its aperture to the first valve 21, i.e. the aperture of the first valve 21 is kept not
Become.
The step of S200, set-pressure, the realization process of the step are as follows: the revolving speed based on expanding machine, 20 basis of central controller
The pressure signal that first pressure sensor 24 and second pressure sensor 26 transmit, by the flow for being passed through expanding machine natural gas
The pressure for the natural gas for being controlled, and then detecting first pressure sensor 24 and second pressure sensor 26 is in central controller
The stress level of 20 settings.The step specifically includes that
1) during set-pressure, the revolving speed of expanding machine is obtained, is less than the highest that central controller 20 is set in expanding machine
In the case of allowing revolving speed, the pressure signal that is further transmitted according to first pressure sensor 24 and second pressure sensor 26 into
The following corresponding control operation of row:
11) when the pressure signal (i.e. the pressure of the low-pressure pipe network in downstream) that second pressure sensor 26 transmits is lower than central controller
20 setting stress levels and first pressure sensor 24 transmit pressure signal (pressure i.e. in surge tank) be in setting
When stress level, central controller 20 sends the signal for improving the exciting current of generator to the excitation module of generator 13 to improve hair
The revolving speed of motor 13 increases the revolving speed of expanding machine 12 also slowly therewith,
Until the pressure signal that first pressure sensor 24 is transmitted reaches following dbjective state: the stress level slightly above set.Such as
When the pressure signal that second pressure sensor 26 transmits reaches the stress level of setting, excitation of the central controller 20 to generator 13
Module sends the signal for improving the exciting current of generator the revolving speed of generator 20 is improved 0.1-10%, then according to following
Step carries out:
If 111) pressure signal that second pressure sensor 26 transmits persistently reduces, central controller 20 is sent to generator 13
The signal of the revolving speed of generator can be further increased, the revolving speed of expanding machine 20 also further increases therewith, until central controller 20
Detect the pressure bottom out that second pressure sensor 26 transmits；
112) if central controller 20 detects the pressure signal bottom out that second pressure sensor 26 transmits, central controller 20
The signal that can reduce the revolving speed of generator 13 is sent to generator 13；
Central controller 20 can be received in real time or every certain time interval (such as 1 second) and according to above-mentioned 111) and
112) Adjustment principle circulation adjusts the pressure that the natural gas of position is arranged in second pressure sensor 26, that is, passes through regulator generator
The mode of 13 exciting current, until the pressure signal that second pressure sensor 26 transmits reaches and stablizes to the pressure water of setting
It is flat.
12) when the pressure signal that second pressure sensor 26 transmits is higher than the stress level of setting (at this time in surge tank
The inevitable stress level also above setting of pressure), central controller 20 is sent to the excitation module of generator 13 reduces generator
The signal of exciting current is to reduce the revolving speed of generator 13, as made expanding machine 12 in a manner of the revolving speed for slowly reducing generator
Revolving speed also slowly reduces therewith, until the pressure signal that second pressure sensor 26 transmits reaches following dbjective state: slightly above
The stress level of setting, such as when the pressure signal that second pressure sensor 26 transmits reaches the stress level of setting, central controller
20 send the signal for improving the exciting current of generator to the excitation module of generator 13 to improve the revolving speed of generator 20
0.1-10%.This is because the revolving speed reduction of expanding machine 12 needs the time, therefore, if second pressure sensor 26 detects
Pressure be in the stress level of setting, then the pressure of the setting position of second pressure sensor 26 can be with expanding machine
Revolving speed is reduced and is reduced, so that the pressure of the natural gas of the setting position of second pressure sensor 26 be made to be reduced in setting
Stress level after, the stress level of setting can be fallen further below as the revolving speed of expanding machine reduces strategy.This meeting
Adjustable strategies are made to fail, therefore dbjective state is set as the amount of the stress level slightly above set, this is to be final with the second pressure
The pressure of the natural gas of the setting position of force snesor 26 approaches and the target of the stress level in setting is kept to reserve sky
Between.
13) when stress level of the pressure signal that first pressure sensor 24 is transmitted lower than setting, (downstream is low at this time
The inevitable stress level also below setting of the pressure of pressure pipe net), central controller 20 sends to the excitation module of generator 13 and improves hair
The signal of the exciting current of motor such as makes to expand to improve the revolving speed of generator 13 in a manner of slowly improving the revolving speed of generator
The revolving speed of machine 12 also slowly improves therewith, until the pressure signal that first pressure sensor 24 is transmitted reaches and stablizes to setting
Stress level.
2) during set-pressure, the revolving speed of expanding machine is obtained, is more than or equal to central controller 20 in the revolving speed of expanding machine
In the case of the maximum permissible revolution of setting, then further transmitted according to first pressure sensor 24 and second pressure sensor 26
Pressure signal carry out following corresponding control operation:
21) when the pressure signal that first pressure sensor 24 and second pressure sensor 26 transmit is above the pressure of setting
When horizontal, then central controller 20 to according to it is aforementioned 1) in step 12) carry out pressure adjustment, i.e., central controller 20 by reduce generator
The pressure signal that 13 revolving speed transmits second pressure sensor 26 is slightly above the stress level set；
22) when the pressure signal of one of transmission in first pressure sensor 24 and second pressure sensor 26 is lower than
When the stress level of setting, then central controller 20 to the excitation module of generator 13 send improve generator exciting current signal with
On the one hand the revolving speed for improving generator 13 makes generator 13 and expanding machine 12 keep maximum permissible revolution, at the same central controller 20 to
Monitoring client sends the maximum insufficient standby signal of air demand (such as alarm signal of sound and/or light form)；
Central controller 20 can in real time or every certain time interval (such as 1 second) obtain expanding machine revolving speed and according to
Above-mentioned principle circulation 21) and 22) adjusts the stress level of first pressure sensor and second pressure cell pressure, passes through tune
The mode of the revolving speed of generator 13 is saved, until the pressure signal that first pressure sensor and second pressure sensor transmit reaches simultaneously
Stablize to the stress level of setting.
That is, whether reaching maximum permissible revolution according to the current rotating speed of expanding machine, the pressure of natural gas is adjusted
Strategy is divided into two kinds of situations to handle.In the case of expanding machine is less than maximum permissible revolution, if surge tank and low-pressure pipe network
Pressure is below the stress level of setting, then makes the flow for the natural gas for being passed through expanding machine by way of improving generator speed
Increase, and then increase the pressure of surge tank and the pressure of downstream pipe network constantly, until the pressure for reaching surge tank is slightly above set
The dbjective state of fixed stress level.And in the case of expanding machine is more than or equal to maximum permissible revolution, if surge tank and low pressure
One of them in the pressure of pipe network is lower than the stress level set, then while keeping expanding machine to operate with maximum permissible revolution
To remote alarms, and if the pressure of surge tank and low-pressure pipe network is above the stress level of setting, by reduce generator turn
The mode of speed is until the pressure of surge tank reaches the dbjective state of the stress level slightly above set.
In practical control process, influence due to temperature to pressure, by the tuning process of temperature and pressure using gradually
Approximatioss recycles the adjusting of temperature and pressure and carries out, control performance is finally made to reach desired precision.
It should be noted that although serials control of the invention is the scheme of adjustment major loop after the completion of subloop adjustment,
But during adjusting major loop, if the adjustment due to parameter makes the parameter of subloop change, it should adjust in real time
Whole subloop makes the relevant parameter in (major and minor) circuit that can reach the preset level of central controller.
Embodiment 2
Fig. 2 shows the structural schematic diagrams of the Natural gas expander independence regulator of another embodiment of the invention.Such as
Shown in Fig. 2, embodiment 2 is that the gas inlet of pressure regulator valve 11 is connected to low-voltage tube in device with the 1 of embodiment difference
Net, that is to say, that preheating fuel is the low pressure natural gas that can lead directly to user terminal.Compared to embodiment 1, this reality
The scheme for applying example improves the safety of preheating link, thus but preheating scale high more suitable for security requirement and
The degree application scenarios smaller than embodiment 1.The other parts of device are similar with embodiment, the pressure regulation method and embodiment base of device
This is identical, and details are not described herein.
So far, it has been combined preferred embodiment shown in the drawings and describes technical solution of the present invention.But this field
Technical staff is it is easily understood that protection scope of the present invention is expressly not limited to these specific embodiments.Without departing from this
Under the premise of the principle of invention, those skilled in the art can make equivalent change or replacement to the relevant technologies feature, these
Technical solution after change or replacement will fall within the scope of protection of the present invention.
Claims (2)
1. a kind of Natural gas expander independence pressure regulation method, which is characterized in that this method comprises: it is independent to provide Natural gas expander
The step of the step of the step of regulator, adjusting temperature and set-pressure, and the step of set-pressure is in institute
What the step of stating adjusting temperature carried out under the premise of completing；
Wherein, the Natural gas expander independence regulator provided includes:
01) natural gas system, the natural gas being used in the high pressure pipe network to upstream be depressured and pressure recovery energy, Yi Jiyong
In will be depressured and pressure recovery energy after natural gas lead to downstream low-pressure pipe network, the natural gas system include heater,
Expanding machine, generator, surge tank and pressure regulator valve；
Wherein, the first gas inlet of the heater is connected to the high pressure pipe network, the gas outlet of the heater
It is connected with the gas inlet of the expanding machine, the gas inlet of the gas outlet of the expanding machine and the surge tank
It is connected, the gas outlet of the surge tank is connected to the low-pressure pipe network, and the generator is connected with the expanding machine；
Wherein, the second gas inlet of the heater is connected to the fuel pipe network that can obtain preheating fuel, the tune
Pressure valve is set between second gas inlet and the fuel pipe network, and the fuel pipe network is high pressure pipe network or low pressure
Pipe network；
02) regulator control system comprising central controller and the temperature sensor being respectively connected with the central controller by signal cable,
Speed probe, pressure sensor group and valve group, the central controller are used for during the decompression and pressure recovery energy
Corresponding parameter is adjusted, the central controller also passes through signal cable and is connected with the generator, and the central controller is according to
The pressure signal of pressure sensor group transmission adjusts the revolving speed of the generator,
Wherein, the temperature sensor is set between the gas outlet of heater and the gas inlet of the expanding machine,
The temperature sensor is used to detect the temperature of the natural gas in the gas outlet downstream of heater and sends temperature signal to
The central controller；
Wherein, the speed probe is set to the expanding machine, the generator or between the two, the speed probe
For detecting the revolving speed of the generator or the expanding machine and sending tach signal to the central controller；
The valve group includes:
First valve is set between the gas outlet of the pressure regulator valve and the second gas inlet of the heater,
The central controller can adjust the aperture of first valve according to the temperature signal temperature that the temperature sensor transmits；And
Second valve is set between the surge tank and the low-pressure pipe network, and the central controller can adjust described second
The aperture of valve；
Wherein, the pressure sensor group includes:
First pressure sensor is set on surge tank, and the first pressure sensor is natural in surge tank for detecting
Atmospheric pressure simultaneously sends pressure signal to the central controller；And
Second pressure sensor is set between second valve and low-pressure pipe network, and the second pressure sensor is used for
The gas pressure of low-pressure pipe network is led in detection；
03) monitoring client, is used to receive the data of the central controller transmission, and reads data for sending to the central controller
Request；
Wherein, the step of adjusting temperature are as follows: according to the natural gas of the gas outlet of the heater of temperature sensor detection
Temperature, central controller by adjusting the first valve opening mode so that the temperature of natural gas reaches and stablizes to the central controller
The temperature levels of setting；
Wherein, the step of set-pressure are as follows: the revolving speed based on expanding machine, central controller is according to first pressure sensor and second
The surge tank of pressure sensor detection and the pressure of low-pressure pipe network upstream, changed by the control of revolving speed to generator be passed through it is swollen
The flow of the natural gas of swollen machine, and then the pressure for the natural gas for detecting first pressure sensor and second pressure sensor reaches
To and stablize to central controller set stress level.
2. Natural gas expander independence pressure regulation method according to claim 1, which is characterized in that the step of the set-pressure
Suddenly it specifically includes:
1) it in the case of expanding machine is less than the maximum permissible revolution of setting, is sensed according to first pressure sensor and second pressure
The pressure of device detection carries out pressure setting control below:
11) when the pressure of second pressure sensor detection is lower than the pressure of the stress level of setting and first pressure sensor detection
When power is in the stress level of setting, central controller sends the signal for improving the exciting current of generator to the excitation module of generator
To improve the revolving speed of generator, and then increase the revolving speed of expanding machine also, until the pressure of first pressure sensor transmission
Signal reaches the first object state of the first preset value of stress level higher than setting, then follows the steps below control:
111) if the pressure of second pressure sensor detection persistently reduces, central controller can be further increased to generator transmission
The signal of the revolving speed of generator, the revolving speed of expanding machine also further increase therewith, until the pressure of second pressure sensor detection
Bottom out；
112) if the pressure bottom out of second pressure sensor detection, central controller can reduce generator to generator transmission
Revolving speed signal, the revolving speed of expanding machine also further decreases therewith, until the pressure of second pressure sensor detection starts to drop
It is low；
Central controller receive and according to above-mentioned steps 111) and 112) principle circulation adjust second pressure sensor detect it is natural
The pressure of gas, until the pressure of second pressure sensor detection reaches and stablizes to the stress level of setting；
12) when the pressure signal of second pressure sensor detection is higher than the stress level of setting, central controller is encouraged to generator
Magnetic module sends the signal of the exciting current of reduction generator to reduce the revolving speed of generator, and the revolving speed of expanding machine also drops therewith
It is low, until the pressure of second pressure sensor detection reaches the second target-like of the second preset value of stress level higher than setting
State；
13) when stress level of the pressure of first pressure sensor detection lower than setting, excitation mould of the central controller to generator
Block sends the signal of the exciting current of raising generator to improve the revolving speed of generator, and the revolving speed of expanding machine also slowly rises therewith
Height, until the pressure of first pressure sensor detection reaches and stablizes to the stress level of setting；
2) in the case of the revolving speed of expanding machine is more than or equal to the maximum permissible revolution of setting, then according to first pressure sensor and
The pressure of second pressure sensor detection carries out following corresponding adjusting control:
21) when the pressure that first pressure sensor and second pressure sensor detect is above the stress level of setting, then in
Device is controlled according to above-mentioned steps 12) carry out pressure adjustment, i.e. central controller makes second pressure sensor by reducing the revolving speed of generator
The pressure of detection reaches the third dbjective state of the stress level third preset value higher than setting；
22) when pressure water of the pressure of one of detection in first pressure sensor and second pressure sensor lower than setting
Usually, then central controller sends the exciting current signal for improving generator to the excitation module of generator to improve turning for generator
On the one hand speed makes generator and expanding machine keep maximum permissible revolution operating, while central controller sends maximum gas supply to monitoring client
Measure insufficient standby signal；
Central controller receive and according to above-mentioned steps 21) and 22) principle circulation adjust first pressure sensor and second pressure biography
The pressure of the natural gas of sensor detection, until the pressure signal that first pressure sensor and second pressure sensor transmit reaches simultaneously
Stablize to the stress level of setting.
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| US11592009B2 (en) | 2021-04-02 | 2023-02-28 | Ice Thermal Harvesting, Llc | Systems and methods for generation of electrical power at a drilling rig |
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| US11187212B1 (en) * | 2021-04-02 | 2021-11-30 | Ice Thermal Harvesting, Llc | Methods for generating geothermal power in an organic Rankine cycle operation during hydrocarbon production based on working fluid temperature |
| US11480074B1 (en) | 2021-04-02 | 2022-10-25 | Ice Thermal Harvesting, Llc | Systems and methods utilizing gas temperature as a power source |
| US11493029B2 (en) | 2021-04-02 | 2022-11-08 | Ice Thermal Harvesting, Llc | Systems and methods for generation of electrical power at a drilling rig |
| US11644015B2 (en) | 2021-04-02 | 2023-05-09 | Ice Thermal Harvesting, Llc | Systems and methods for generation of electrical power at a drilling rig |
| US11326550B1 (en) | 2021-04-02 | 2022-05-10 | Ice Thermal Harvesting, Llc | Systems and methods utilizing gas temperature as a power source |
| US11421663B1 (en) | 2021-04-02 | 2022-08-23 | Ice Thermal Harvesting, Llc | Systems and methods for generation of electrical power in an organic Rankine cycle operation |
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| CN202209192U (en) * | 2011-08-30 | 2012-05-02 | 上海申能临港燃机发电有限公司 | Natural gas differential pressure power generation device |
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