CN207348920U - A kind of natural gas afterheat differential pressure power generating system - Google Patents
A kind of natural gas afterheat differential pressure power generating system Download PDFInfo
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- CN207348920U CN207348920U CN201721396368.XU CN201721396368U CN207348920U CN 207348920 U CN207348920 U CN 207348920U CN 201721396368 U CN201721396368 U CN 201721396368U CN 207348920 U CN207348920 U CN 207348920U
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Abstract
The utility model discloses a kind of natural gas afterheat differential pressure power generating system, including：Using the pressure difference turbine of high-pressure natural gas power generation, boiler, utilize the steam turbine of boiler smoke power generation and the main fuel tank for providing lubricating oil for pressure difference turbine, steam turbine；The air inlet connection high-pressure natural gas source of pressure difference turbine, and regulating valve is provided with before relief valve, turbine on connecting line and for fast valve before the turbine of closing path when the throughput in connecting line be less than preset value；The heat source air inlet of the gas outlet connection boiler of pressure difference turbine；Main fuel tank connects steam turbine and pressure difference turbine by AC Lub oil pump respectively, and main fuel tank connects steam turbine and pressure difference turbine by DC lubricating respectively, and AC Lub oil pump and DC lubricating are chain mutually.Natural gas afterheat differential pressure power generating system provided by the utility model is generated electricity using the thermal energy and pressure energy of high-pressure natural gas, is not only saved resource, is also reduced infrastructure cost.
Description
Technical field
Natural gas afterheat technical field of power generation is the utility model is related to, more specifically to a kind of natural gas afterheat pressure
Poor electricity generation system.
Background technology
Natural gas needs high pressure to realize conveying in course of conveying, and reaches needs at user and depressurized.In western gas east
Generally pressure in pipeline of transferring natural gas from the west to the east is set to maintain in certain scope using combustion engine driving natural gas boosting machine in defeated engineering,
This process Middle combustion engine gives off substantial amounts of hot gas, and the temperature of these hot gas is higher, and the utilization to these hot gas at present is usually logical
Cross hot gas and carry out water in heating boiler, produce superheated steam, superheated steam driving steam turbine is rotated and produced electricl energy, and then supplies user
Use.
In general, combustion engine discharge hot gas heat transfer feedwater is produced into overheat by boiler using natural gas afterheat power generation
Steam, then the power generation of superheated steam driving Turbo-generator Set is, it is necessary to three steps, if the pressure leak process pressure difference of natural gas is saturating
Flat machine is completed, then only needs the step to can be achieved with the decompression of high-pressure natural gas, can also realize the energy conversion of decompression process.So
And in the prior art, pressure difference turbine can only utilize the pressure difference in pressure leak process, it is impossible to utilize heat in pressure leak process.
In conclusion how to provide a kind of natural gas afterheat differential pressure power generating system, be current those skilled in the art urgently
Solve the problems, such as.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of natural gas afterheat differential pressure power generating system, more than the natural gas
Natural gas afterheat can generate electricity for hot differential pressure power generating system and top pressure power generation is comprehensively utilized, and saves the energy.
To achieve these goals, the utility model provides following technical solution：
A kind of natural gas afterheat differential pressure power generating system, including：
Using high-pressure natural gas power generation pressure difference turbine, boiler, using boiler smoke power generation steam turbine and for for
The pressure difference turbine, steam turbine provide the main fuel tank of lubricating oil；
The air inlet connection high-pressure natural gas source of the pressure difference turbine, to drive the pressure difference turbine to rotate, and
Regulating valve is provided with before relief valve, turbine on connecting line and for when the throughput in the connecting line is less than default
Fast valve before the turbine of closing path during value；
The gas outlet of the pressure difference turbine connects the heat source air inlet of the boiler；
The main fuel tank connects the steam turbine and the pressure difference turbine, the main oil by AC Lub oil pump respectively
Case connects the steam turbine and the pressure difference turbine by DC lubricating respectively, the AC Lub oil pump and described straight
It is chain mutually to flow grease pump；
On the connecting line of the main fuel tank and the steam turbine, the connecting tube of the main fuel tank and the pressure difference turbine
Road is equipped with heat exchanger and spare heat exchanger for cutting oil.
Preferably, the cooling oil output pipe of the heat exchanger and the spare heat exchanger, which is equipped with, is used for filtering lubricant oil
The oil filter of impurity, the lubricating oil pipeline that the oil filter is connected with the steam turbine are equipped with oil pressure detection devices and low oil
Press warning device.
Preferably, further include for its internal lubricating oil to be imported regulating system when oil mass is excessive in the main fuel tank
In high voltage startup oil pump, the main fuel tank bottom is provided with pipeline and oil mass monitoring device, the oil mass monitoring device connection
High voltage startup oil pump, the pipeline connect the high voltage startup oil pump.
Preferably, the shaft of the steam turbine is provided at both ends with for carrying out steam-tight steam seal device, both ends
The steam seal device connect the outlet pipe of surge tank respectively.
Preferably, the cold energy input port of the surge tank connects the cold energy delivery outlet of the condenser of the steam turbine.
In the system of the offer of the utility model, the high-pressure natural gas that high-pressure natural gas source provides is delivered to pressure difference turbine
Machine, for driving turbine to rotate in pressure difference turbine, so as to produce electricl energy, high-pressure natural gas does work through overpressure difference turbine
Afterwards, become the natural gas of low-voltage high-temperature, then be delivered to boiler as heat source.It is used as the reception of boiler smoke by steam turbine at the same time
Device, is generated electricity using flue gas, and natural gas afterheat differential pressure power generating system provided by the utility model utilizes high-pressure natural gas
Thermal energy and pressure energy generate electricity, not only save resource, also reduce infrastructure cost.
Brief description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is the embodiment of the utility model, for those of ordinary skill in the art, without creative efforts, also
Other attached drawings can be obtained according to the attached drawing of offer.
Fig. 1 is the schematic diagram of natural gas afterheat differential pressure power generating system provided by the utility model；
Fig. 2 is the schematic diagram of steam turbine part in natural gas afterheat differential pressure power generating system provided by the utility model.
In Fig. 1-2：
Steam turbine 1, generator 2, hydrophobic development unit 3, surge tank 4；
Regulating valve 9, pressure difference turbine before fast valve 8, turbine before boiler 5, high-pressure natural gas source 6, relief valve 7, turbine
Machine 10；
Main fuel tank 15, AC Lub oil pump 16, DC lubricating 17, heat exchanger 18, spare heat exchanger 19, high voltage startup
Oil pump 20, regulating system 21；Exhaust-valve 22, condenser 23.
Embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without making creative work
All other embodiments obtained, shall fall within the protection scope of the present invention.
The core of the utility model is to provide a kind of natural gas afterheat differential pressure power generating system, the natural gas afterheat differential pressure power generation
Natural gas afterheat can generate electricity for system and top pressure power generation is comprehensively utilized, and saves the energy.
Please refer to Fig.1 and Fig. 2, Fig. 1 be natural gas afterheat differential pressure power generating system provided by the utility model schematic diagram；
Fig. 2 is the schematic diagram of steam turbine part in natural gas afterheat differential pressure power generating system provided by the utility model.
A kind of natural gas afterheat differential pressure power generating system provided by the utility model, using high-pressure natural gas power generation
Pressure difference turbine 10, boiler 5, using boiler smoke power generation steam turbine 1 and for being provided for pressure difference turbine 10, steam turbine 1
The main fuel tank 15 of lubricating oil.
Wherein, the air inlet connection high-pressure natural gas source 6 of pressure difference turbine 10, to drive pressure difference turbine 10 to rotate,
And regulating valve 9 is provided with before relief valve 7, turbine on connecting line and for when the throughput in connecting line is less than default
Fast valve 8 before the turbine of closing path during value；In addition, the heat source air inlet of the gas outlet connection boiler 5 of pressure difference turbine 10.
Main fuel tank 15 connects steam turbine 1 and pressure difference turbine 10 respectively by AC Lub oil pump 16, and main fuel tank passes through straight
Stream grease pump 17 connects steam turbine 1 and pressure difference turbine 10 respectively, and AC Lub oil pump 16 and DC lubricating 17 are mutual
It is chain.
Main fuel tank 15 with the connecting line of steam turbine 1, main fuel tank 15 and the connecting line of pressure difference turbine 10 be equipped with
Heat exchanger 18 and spare heat exchanger 19 for cutting oil.
It should be noted that relief valve 7 is connected on the pipeline between pressure difference turbine 10 and high-pressure natural gas source 6, use
The position of fast valve 8 please refers to Fig.1 before the removal that pressure is carried out to the connecting line, turbine, wherein it is possible in turbine
Pressure monitoring devices are set in preceding fast valve 8 or on above-mentioned connecting line, for detecting the circulation of high-pressure air source, work as high pressure
When the high-pressure air source that gas source 6 provides is unstable or inadequate, before pressure monitoring devices can send a signal to turbine
Fast valve 8, fast valve 8 is closed before turbine, so as to which connecting line is cut off, avoids in pressure difference turbine 10 pressure not
Foot.
Main fuel tank 15 is used to provide lubricating oil, main fuel tank 15 and AC Lub oil pump for steam turbine 1, pressure difference turbine 10
16th, DC lubricating 17 connects, and by 16 steam turbine 1 of AC Lub oil pump and pressure difference turbine 10, simultaneously also by straight
Flow grease pump 17 and connect steam turbine 1 and pressure difference turbine 10.Fuel injection system generally uses AC Lub oil pump 16, exchange lubrication
Oil pump 16 is to drive grease pump using three-phase alternating-current motor, is moistened when alternating current powers off or accident occurs suddenly with direct current
Lubricating oil oil pump feed, DC lubricating by the dc motor of storage battery power supply using can drive direct current lubricating oil
Pump.Chain main purpose is that direct current oil pump automatically engages guarantee mechanical lubrication when accident occurs in alternating current mutually for the two, rises
To the effect of protection machinery.
Both heat exchanger 18 and spare heat exchanger 19 can be used alone, and can also use at the same time, and spare heat exchanger 19 is used
Supplement and support in being provided for heat exchanger 18.
It should be noted that the application provide natural gas afterheat differential pressure power generating system, including pressure difference turbine system and
Turbine system, pressure difference turbine system and turbine system share a lubricating oil system.
In the pressure difference turbine system of the offer of the utility model, the high-pressure natural gas that high-pressure natural gas source is provided conveys
To pressure difference turbine, for driving turbine to rotate in pressure difference turbine, so as to produce electricl energy, high-pressure natural gas is through overpressure difference
After turbine acting, become the natural gas of low-voltage high-temperature, then be delivered to boiler as heat source.In high pressure-temperature natural gas transportation extremely
Fast valve, regulating valve and relief valve are provided with the pipeline of pressure difference turbine.
On the basis of above-described embodiment, the cooling oil output pipe of heat exchanger 18 and spare heat exchanger 19, which is equipped with, to be used
In the oil filter of filtering lubricant oil impurity, the lubricating oil pipeline that oil filter is connected with steam turbine 1 be equipped with oil pressure detection devices with
And low oil pressure warning device.
Oil filter is provided with the oil pipeline of heat exchanger 18, mainly to the lubrication oil filtration into steam turbine, is prevented
Impurity enters steam turbine, damages rotation axis.
The offer lubricating oil that said structure is stablized to steam turbine 1, pressure difference turbine 10, and lubricating oil is filtered, with
Ensure the safe operation of steam turbine and extend the service life of steam turbine.
On the basis of above-described embodiment, further include for when oil mass is excessive in main fuel tank 15 by its internal lubrication
Oil imports the high voltage startup oil pump 20 in regulating system 21, and 15 bottom of main fuel tank is provided with pipeline and oil mass monitoring device, oil mass
Monitoring device connection high voltage startup oil pump 20, pipeline connection high voltage startup oil pump 20.
It should be noted that being provided with pipeline in the bottom of main fuel tank 15, pipeline is connected with high voltage startup oil pump 20, if
Oil mass is excessive in main fuel tank, starts high voltage startup oil pump 20, and the oil of main fuel tank 15 is conveyed into the regulating system 21 of lubricating oil.
It should be noted that above-mentioned regulating system 21 can be a fuel tank or for can oil storage, the equipment of fuel feeding, adjust
Section system 21 is independently of the isostructural system of above-mentioned oil feed pump.
Oil mass monitoring device is used to monitor the oil mass in main fuel tank 15, when oil mass is higher than setting value, monitors and fills with oil mass
The high voltage startup oil pump 20 for putting connection starts, and controls the lubricating oil in main fuel tank 15 to be transported in regulating system 21, so that real
Now adjust the purpose of 15 inside oil mass of main fuel tank.
On the basis of any one above-mentioned embodiment, the shaft of steam turbine 1 is provided at both ends with close for carrying out steam
The steam seal device of envelope, the steam seal device at both ends connect the outlet pipe of surge tank 4 respectively.
The low-pressure superheated steam outlet of the air inlet pipeline connection boiler in the stage casing of steam turbine 1；The outlet of the afterbody of steam turbine 1
Pipeline connects condenser 23.The cold energy input port of surge tank 4 connects cold energy delivery outlet and the offer of the condenser of steam turbine 1 respectively
The circulating water pool of cold energy.
On the basis of above-described embodiment, the cold energy of the condenser of the cold energy input port connection steam turbine 1 of surge tank 4 is defeated
Outlet.
Except the primary structure and connection relation of the natural gas afterheat differential pressure power generating system that above-mentioned each embodiment is provided,
The structure of other each several parts of the natural gas afterheat differential pressure power generating system refer to the prior art, repeat no more herein.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.
Natural gas afterheat differential pressure power generating system provided by the utility model is described in detail above.Herein should
The principle and embodiment of the utility model are set forth with specific case, the explanation of above example is only intended to side
Assistant solves the method and its core concept of the utility model.It should be pointed out that for those skilled in the art,
On the premise of the utility model principle is not departed from, some improvement and modification, these improvement can also be carried out to the utility model
Also fallen into modification in the protection domain of the utility model claims.
Claims (5)
- A kind of 1. natural gas afterheat differential pressure power generating system, it is characterised in that including：Utilize the pressure difference turbine (10) of high-pressure natural gas power generation, boiler (5), the steamer to generate electricity using the boiler (5) flue gas Machine (1) and the main fuel tank (15) for providing lubricating oil for the pressure difference turbine (10) and the steam turbine (1)；Air inlet connection high-pressure natural gas source (6) of the pressure difference turbine (10), to drive the pressure difference turbine (10) Rotate, and regulating valve (9) is provided with before relief valve (7), turbine on connecting line and for when in the connecting line Fast valve (8) before the turbine of closing path when throughput is less than preset value；The gas outlet of the pressure difference turbine (10) connects the heat source air inlet of the boiler (5)；The main fuel tank (15) connects the steam turbine (1) and the pressure difference turbine respectively by AC Lub oil pump (16) (10), the main fuel tank (15) connects the steam turbine (1) and the pressure difference turbine respectively by DC lubricating (17) (10), the AC Lub oil pump (16) and the DC lubricating (17) are chain mutually；On the connecting line of the main fuel tank (15) and the steam turbine (1), the main fuel tank (15) and the pressure difference turbine (10) connecting line is equipped with heat exchanger (18) and spare heat exchanger (19) for cutting oil.
- 2. natural gas afterheat differential pressure power generating system according to claim 1, it is characterised in that the heat exchanger (18) and institute State spare heat exchanger (19) cooling oil output pipe be equipped with for filtering lubricant oil impurity oil filter, the oil filter with The lubricating oil pipeline of steam turbine (1) connection is equipped with oil pressure detection devices and low oil pressure warning device.
- 3. natural gas afterheat differential pressure power generating system according to claim 2, it is characterised in that further include for working as the master It is described by the high voltage startup oil pump (20) in its internal lubricating oil importing regulating system (21) when fuel tank (15) interior oil mass is excessive Main fuel tank (15) bottom is provided with pipeline and oil mass monitoring device, and the oil mass monitoring device connects high voltage startup oil pump (20), The pipeline connects the high voltage startup oil pump (20).
- 4. natural gas afterheat differential pressure power generating system according to claim 3, it is characterised in that the steam turbine (1) turns Axis is provided at both ends with for carrying out steam-tight steam seal device, and the steam seal device at both ends connects respectively presses The outlet pipe of case (4).
- 5. natural gas afterheat differential pressure power generating system according to claim 4, it is characterised in that the surge tank (4) it is cold Energy input port connects the cold energy delivery outlet of the condenser of the steam turbine (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721396368.XU CN207348920U (en) | 2017-10-24 | 2017-10-24 | A kind of natural gas afterheat differential pressure power generating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721396368.XU CN207348920U (en) | 2017-10-24 | 2017-10-24 | A kind of natural gas afterheat differential pressure power generating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207348920U true CN207348920U (en) | 2018-05-11 |
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ID=62356180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721396368.XU Active CN207348920U (en) | 2017-10-24 | 2017-10-24 | A kind of natural gas afterheat differential pressure power generating system |
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| Country | Link |
|---|---|
| CN (1) | CN207348920U (en) |
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2017
- 2017-10-24 CN CN201721396368.XU patent/CN207348920U/en active Active
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