CN114876586A - Differential pressure power generation device and technology - Google Patents
Differential pressure power generation device and technology Download PDFInfo
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- CN114876586A CN114876586A CN202210406953.2A CN202210406953A CN114876586A CN 114876586 A CN114876586 A CN 114876586A CN 202210406953 A CN202210406953 A CN 202210406953A CN 114876586 A CN114876586 A CN 114876586A
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- Prior art keywords
- expander
- power generation
- pipeline
- differential pressure
- gas
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- 238000010248 power generation Methods 0.000 title claims abstract description 31
- 238000005516 engineering process Methods 0.000 title abstract description 16
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 64
- 239000003345 natural gas Substances 0.000 claims abstract description 32
- 239000007789 gas Substances 0.000 claims abstract description 23
- 239000006200 vaporizer Substances 0.000 claims abstract description 18
- 230000005611 electricity Effects 0.000 claims abstract description 8
- 230000008878 coupling Effects 0.000 claims abstract description 5
- 238000010168 coupling process Methods 0.000 claims abstract description 5
- 238000005859 coupling reaction Methods 0.000 claims abstract description 5
- 239000002737 fuel gas Substances 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052799 carbon Inorganic materials 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000411 inducer Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2220/00—Application
- F05D2220/70—Application in combination with
- F05D2220/76—Application in combination with an electrical generator
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention provides a differential pressure power generation device and technology, and relates to the field of natural gas differential pressure power generation devices. The pressure difference power generation device and the technology comprise an expander, wherein one end of the expander is connected with an input pipe, the other end of the expander is connected to the driving end of a power generator through a coupling, the bottom of the expander is connected to one end of an air-temperature gasifier through a pipeline, the other end of the air-temperature gasifier is connected to one end of a water-bath vaporizer through a pipeline, and the other end of the water-bath vaporizer is connected with a flow meter through a pipeline. Through gas pressure energy resource for city burning pipeline door station natural gas, plan to adopt expander power generation technology, realize the conversion of pressure energy, mechanical energy and electric energy, under the condition that does not produce extra carbon and discharge, produce the electric energy, gas pressure difference electricity generation inflation technology in this scheme can ensure the high efficiency of turbine, ensures gaseous ultimate emission operating mode condition, satisfies the requirement of user to gas temperature, pressure.
Description
Technical Field
The invention relates to the technical field of natural gas differential pressure power generation devices, in particular to a differential pressure power generation device and technology.
Background
As a common clean energy source, the natural gas has huge pressure energy when being collected from the underground, and the long-distance transportation of the natural gas generally adopts a high-pressure pipe transportation mode. In recent years, the pipeline transportation pressure is becoming higher and higher worldwide.
When the natural gas has certain pressure and temperature, the natural gas has certain energy, namely potential energy represented by the pressure and kinetic energy represented by the temperature, which are jointly called as the internal energy of the natural gas. When the pressure is reduced by the pressure regulator in the pressure regulating station, part of the internal energy is lost. Until the advent of expander technology, one could not recover this energy. The problem that now solves utilizes the natural gas to carry out adiabatic expansion in the expander, and the internal energy reduces and outwards does work to drive the technique that the generator was converted into the electric energy and was retrieved by the expander drive generator.
At present, the comprehensive utilization technology of natural gas pressure energy at home and abroad has been developed for many years, both theoretical research and physical manufacturing are mature, related differential pressure power generation projects are preferentially built in some regions, and a technical route of 'expansion power generation' + 'heat exchanger heat supplement' + 'electric quantity internet surfing' is generally adopted, so that the pressure and the temperature required by urban gas supply are met, electric energy is output, and good economic benefit is obtained.
The conventional pressure difference power generation can generate low temperature after pressure reduction, and an additional heating device is needed to consume energy, consume heat and waste energy.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a differential pressure power generation device and technology, which solve the problems that the conventional differential pressure power generation is low in temperature after being reduced in voltage, a heating device is required to consume energy, heat is consumed, and energy is wasted.
In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a pressure differential power generation facility and technique, includes the expander, the one end of expander is connected with the input tube, the other end rotation axis of expander passes through the coupling joint and at the drive end of generator, the bottom of expander is passed through the pipe connection and is in the one end of air temperature formula vaporizer, the other end of air temperature formula vaporizer passes through the one end of pipe connection at water bath formula vaporizer, the other end of water bath formula vaporizer has the flowmeter through the pipe connection.
Preferably, the middle part of the input pipe is provided with a regulating valve, and one end of the input pipe, which is far away from the expansion machine, penetrates through the heater.
Preferably, the power generation end of the generator is connected with an output line, and the output line is used for connecting with electric equipment.
Preferably, one end of the flow meter, which is far away from the water bath type vaporizer, is communicated with an output pipe, and one end of the output pipe, which is far away from the flow meter, is connected with an urban gas pipe network.
Preferably, the differential pressure power generation technology comprises the following steps:
firstly, preheating and heating gas of a low-temperature and high-pressure door station by a heater when the gas passes through an input pipe, and conveying the preheated natural gas into a differential pressure expander through the input pipe and an adjusting valve;
step two, the natural gas applies work in the expander by utilizing pressure energy to push an impeller of the expander to rotate, a rotating shaft end of the expander is connected with a shaft end of a generator through a coupler to drive the generator to generate electricity and output electric power through an output line, the pressure energy is released after the natural gas passes through the expander in the expander, and meanwhile, the temperature and the pressure are both reduced;
and step three, enabling the natural gas to flow to the air-temperature gasifier through a pipeline after the natural gas passes through the expansion machine to enable the expansion machine to do work, heating the fuel gas by the air-temperature gasifier, then introducing the heated fuel gas into the water bath type gasifier through the pipeline, further heating the fuel gas by the water bath type gasifier, enabling the heated fuel gas to enter the flowmeter through the pipeline, and finally inputting the heated fuel gas into the output pipe to flow into the fuel gas pipe network.
Preferably, the expander can be stably operated in a load range of 30 to 110% of the original load.
Preferably, the expander may be of the velocity, capacity or turbine type.
The invention provides a differential pressure power generation device and technology. The method has the following beneficial effects:
according to the invention, the gas pressure energy resource is natural gas at the door station of the urban combustion pipeline, the expander power generation technology is adopted to realize the conversion of pressure energy, mechanical energy and electric energy, and the electric energy is generated under the condition of not generating extra carbon emission.
Drawings
FIG. 1 is a system block diagram of the present invention.
Wherein, 1, an input tube; 2. an expander; 3. a coupling; 4. a generator; 5. an output line; 6. an output pipe; 7. a flow meter; 8. a water bath vaporizer; 9. an air-temperature gasifier; 10. a pipeline; 11. a heater; 12. and adjusting the valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example (b):
as shown in fig. 1, an embodiment of the present invention provides a pressure difference power generation apparatus and technology, including an expander 2, one end of the expander 2 is connected to an input pipe 1, the other end of the expander 2 is connected to a driving end of a generator 4 through a coupling 3, the bottom of the expander 2 is connected to one end of an air-temperature vaporizer 9 through a pipeline 10, the other end of the air-temperature vaporizer 9 is connected to one end of a water-bath vaporizer 8 through a pipeline 10, the other end of the water-bath vaporizer 8 is connected to a flow meter 7 through a pipeline 10, a regulating valve 12 is disposed in the middle of the input pipe 1, one end of the input pipe 1 far from the expander 2 penetrates through a heater 11, a power generation end of the generator 4 is connected to an output line 5, the output line 5 is used for connecting to an electric device, one end of the flow meter 7 far from the water-bath vaporizer 8 is communicated with an output pipe 6, one end of the output pipe 6 far from the flow meter 7 is connected to a gas city pipe network, firstly, preheating and heating low-temperature and high-pressure door station fuel gas by a heater 11, preheating and heating natural gas from 10 ℃ to 34 ℃, wherein the heat energy required by preheating is generally supplied by a fuel gas boiler; the preheated natural gas is sent into a differential pressure expansion machine 2 through an input pipe 1 with a regulating valve 12, the natural gas applies work in the expansion machine 2 by utilizing pressure energy to push an impeller of the expansion machine 2 to rotate, the rotating shaft end of the expansion machine 2 is connected with the shaft end of a generator 4 through a coupler 3 to drive the generator 4 to generate electricity and supply the electricity, wherein the expansion machine 2 can stably operate within the load range of 30-110%, and the regulating valve 12 on the input pipe 1 synchronously regulates the natural gas flow entering the expansion machine 2; after the natural gas passes through the expansion machine 2 in the expansion machine 2, the pressure energy is released, the temperature and the pressure are reduced at the same time, the pressure is reduced from-5.0 MPa to-3.5 MPa, the temperature is reduced from-34 ℃ after preheating to-10 ℃ before preheating, the supply of the natural gas at normal temperature is favorable for the safety and the stability of a power generation system and a pipe transmission system, the conversion of the pressure energy and the mechanical energy is realized by adopting the expansion technology of the expansion machine 2, and the electric energy is generated under the condition of not generating extra carbon emission. The gas pressure difference power generation expansion technology can ensure high entropy efficiency and technical requirements of a turbine, and provides a customized solution for the requirements of a user expansion station. The final discharge working condition of the gas is ensured, and the requirements of users on the temperature and the pressure of the gas are met.
A differential pressure power generation technique comprising the steps of:
firstly, preheating and heating gas of a low-temperature and high-pressure door station by a heater 11 when the gas passes through an input pipe 1, and sending the preheated natural gas into a differential pressure expander 2 through the input pipe 1 and an adjusting valve 12;
and step two, the natural gas applies work in the expander 2 by utilizing pressure energy to push an impeller of the expander 2 to rotate, a rotating shaft end of the expander 2 is connected with a shaft end of the generator 4 through the coupler 3 to drive the generator 4 to generate electricity and output electric power through an output line 5, the pressure energy is released after the natural gas passes through the expander 2 in the expander 2, the temperature and the pressure are reduced, the expander 2 and the generator 4 are connected in parallel with an original metering pressure regulating branch in the station, stable operation of the station yard cannot be influenced, and the differential pressure power generation system can be preferentially operated through an operation pressure set value. When the pressure energy comprehensive utilization system fails, the system automatically cuts off natural gas at an inlet of the system, and normal operation of an original metering pressure regulating branch of a station site cannot be influenced;
and step three, after the natural gas passes through the expander 2, the natural gas enables the expander 2 to do work and then flows to the air-temperature type gasifier 9 through the pipeline 10, the air-temperature type gasifier 9 heats the fuel gas and then leads the fuel gas into the water bath type gasifier 8 through the pipeline 10, the water bath type gasifier 8 further heats the fuel gas, the heated fuel gas enters the flowmeter 7 through the pipeline 10 and finally is input into the output pipe 6 and flows into the fuel gas pipe network.
The expander 2 can stably operate in a load range of 30% -110% of the original load.
The expander 2 may be of the speed, capacity or turbine type, and the turboexpander 2 is a prime mover that expands the compressed gas and outputs power, thereby reducing pressure and energy, and in the turboexpander 2, the energy exchange of the gas takes place between the nozzle blades of the inducer and within the working impeller. The high-pressure air flow is partially expanded in the nozzle and then enters the impeller at a certain speed to push the impeller to rotate. The airflow further expands after entering the impeller, the recoil force of the airflow further pushes the impeller to rotate, and the rotating impeller shaft can drive the generator 4 group to generate electricity. The time for the gas to pass through the expander 2 is extremely short, so that the gas cannot exchange heat with the surrounding environment, the heat insulation efficiency is high, and the gas can be regarded as isentropic expansion. The gas flow into turboexpander 2 can be adjusted by guide vanes to accommodate changes in system load.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A differential pressure power generation device comprising an expander (2), characterized in that: the one end of expander (2) is connected with input tube (1), the other end rotation axis of expander (2) passes through shaft coupling (3) and connects the drive end at generator (4), the one end in air-temperature formula vaporizer (9) is connected through pipeline (10) in the bottom of expander (2), the one end in water bath formula vaporizer (8) is connected through pipeline (10) to the other end of air-temperature formula vaporizer (9), the other end in water bath formula vaporizer (8) is connected with flowmeter (7) through pipeline (10).
2. A differential pressure power generation apparatus as claimed in claim 1, wherein: the middle part of the input pipe (1) is provided with a regulating valve (12), and one end of the input pipe (1) far away from the expansion machine (2) penetrates through the heater (11).
3. A differential pressure electric power generating apparatus according to claim 1, wherein: the power generation end of the power generator (4) is connected with an output line (5), and the output line (5) is used for connecting power utilization equipment.
4. A differential pressure power generation apparatus as claimed in claim 1, wherein: one end of the flow meter (7) far away from the water bath type vaporizer (8) is communicated with an output pipe (6), and one end of the output pipe (6) far away from the flow meter (7) is connected with an urban gas pipe network.
5. A differential pressure power generation technique according to any one of claims 1 to 4, wherein: the method comprises the following steps:
firstly, preheating and heating gas of a low-temperature and high-pressure door station by a heater (11) when the gas passes through an input pipe (1), and sending the preheated natural gas into a differential pressure expander (2) through the input pipe (1) and an adjusting valve (12);
step two, the natural gas applies work in the expansion machine (2) by using pressure energy to push an impeller of the expansion machine (2) to rotate, a rotating shaft end of the expansion machine (2) is connected with a shaft end of a generator (4) through a coupler (3) to drive the generator (4) to generate electricity and output electricity through an output line (5), the pressure energy is released after the natural gas passes through the expansion machine (2) in the expansion machine (2), and meanwhile, the temperature and the pressure are both reduced;
and step three, the natural gas flows to the air-temperature gasifier (9) through the pipeline (10) after the expansion machine (2) works through the expansion machine (2), the air-temperature gasifier (9) heats the fuel gas and then leads the fuel gas into the water bath type gasifier (8) through the pipeline (10), the water bath type gasifier (8) further heats the fuel gas, the heated fuel gas enters the flowmeter (7) through the pipeline (10), and finally the heated fuel gas is input into the output pipe (6) and flows into the fuel gas pipe network.
6. A differential pressure power generation technique as claimed in claim 5, wherein: the expander (2) can stably operate in a load range of 30% -110% of the original load.
7. A differential pressure power generation technique as claimed in claim 5, wherein: the expander (2) may be of the velocity, capacity or turbine type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210406953.2A CN114876586A (en) | 2022-04-18 | 2022-04-18 | Differential pressure power generation device and technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210406953.2A CN114876586A (en) | 2022-04-18 | 2022-04-18 | Differential pressure power generation device and technology |
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| Publication Number | Publication Date |
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| CN114876586A true CN114876586A (en) | 2022-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210406953.2A Pending CN114876586A (en) | 2022-04-18 | 2022-04-18 | Differential pressure power generation device and technology |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130015669A1 (en) * | 2010-03-29 | 2013-01-17 | Sime Srl | Method and an apparatus for obtaining energy by expanding a gas at a wellhead |
| CN202927488U (en) * | 2012-12-13 | 2013-05-08 | 新地能源工程技术有限公司 | Low-temperature natural gas recycling and disposal device |
| CN204827549U (en) * | 2015-05-30 | 2015-12-02 | 上海电力学院 | System is utilized to high efficiency that pipe network natural gas pressure energy and cold energy were retrieved |
| CN105507959A (en) * | 2016-01-19 | 2016-04-20 | 碧海舟（北京）节能环保装备有限公司 | Power generation system and natural gas pressure regulating system for natural gas pressure reduction metering station |
| CN107940235A (en) * | 2017-11-09 | 2018-04-20 | 大连理工大学 | Ultra-low temperature surroundings based on recycling incoming-flow pressure energy take hot day right controlled atmosphere temperature voltage-regulating system |
| CN108316981A (en) * | 2018-03-14 | 2018-07-24 | 中节能工程技术研究院有限公司 | Natural gas overbottom pressure and gas turbine coupling combined supplying system, pipe network system and method |
| CN208473940U (en) * | 2018-07-19 | 2019-02-05 | 葛洲坝能源重工有限公司 | The cold power supply of the natural gas pressure difference association system cold with storage |
| CN114216046A (en) * | 2022-01-20 | 2022-03-22 | 浙江浙能技术研究院有限公司 | LNG cold energy and data center cold supply coupling system and method |
-
2022
- 2022-04-18 CN CN202210406953.2A patent/CN114876586A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130015669A1 (en) * | 2010-03-29 | 2013-01-17 | Sime Srl | Method and an apparatus for obtaining energy by expanding a gas at a wellhead |
| CN202927488U (en) * | 2012-12-13 | 2013-05-08 | 新地能源工程技术有限公司 | Low-temperature natural gas recycling and disposal device |
| CN204827549U (en) * | 2015-05-30 | 2015-12-02 | 上海电力学院 | System is utilized to high efficiency that pipe network natural gas pressure energy and cold energy were retrieved |
| CN105507959A (en) * | 2016-01-19 | 2016-04-20 | 碧海舟（北京）节能环保装备有限公司 | Power generation system and natural gas pressure regulating system for natural gas pressure reduction metering station |
| CN107940235A (en) * | 2017-11-09 | 2018-04-20 | 大连理工大学 | Ultra-low temperature surroundings based on recycling incoming-flow pressure energy take hot day right controlled atmosphere temperature voltage-regulating system |
| CN108316981A (en) * | 2018-03-14 | 2018-07-24 | 中节能工程技术研究院有限公司 | Natural gas overbottom pressure and gas turbine coupling combined supplying system, pipe network system and method |
| CN208473940U (en) * | 2018-07-19 | 2019-02-05 | 葛洲坝能源重工有限公司 | The cold power supply of the natural gas pressure difference association system cold with storage |
| CN114216046A (en) * | 2022-01-20 | 2022-03-22 | 浙江浙能技术研究院有限公司 | LNG cold energy and data center cold supply coupling system and method |
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Application publication date: 20220809 |
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