CN101943323A - Natural gas pressure difference energy recovery process - Google Patents
Natural gas pressure difference energy recovery process Download PDFInfo
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- CN101943323A CN101943323A CN2009101583393A CN200910158339A CN101943323A CN 101943323 A CN101943323 A CN 101943323A CN 2009101583393 A CN2009101583393 A CN 2009101583393A CN 200910158339 A CN200910158339 A CN 200910158339A CN 101943323 A CN101943323 A CN 101943323A
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Abstract
The invention relates to a natural gas energy recovery process by use of pressure difference (ranging from 0.4MPa to 25MPa) between a main line and a branch line between a natural gas delivery main line pipe and a branch line pipe. By adopting the process, pressure difference energy can be recovered, and natural gas getting in and out of processing equipment conforms to the existing pressure requirement for natural gas delivery. The natural gas pressure difference energy recovery process can be used in two ways as follows: power is utilized for power generation, that is, the gas pressure energy is converted into mechanical energy and output for applying work by a direct mode; and the gas with pressure is expanded by virtue of pressure energy and refrigerated to produce liquefied natural gas.
Description
Affiliated technical field
The present invention relates to a kind of between natural gas transport main line and branch pipeline, the technology of utilizing the pressure difference (pressure difference changes between 0.4MPa～25MPa) between main line and the branch line to carry out the rock gas energy recovery.
Background technique
Natural gas line is the main means of transport gas in the present natural gas applications process.Conveying air feed process between conventional high-tension gas trunklines, low pressure natural gas branch line is such: high-pressure natural gas enters regulator through the high-pressure natural gas main line and carries out the choke pressure adjusting, the high-pressure natural gas step-down is become low pressure natural gas, when the gas pressure delivery technology that meets the low pressure natural gas branch line when pressure requires, this rock gas enters the low pressure natural gas branch line, thereby finishes the conveying air feed between gas distributing system.Pressure energy difference between this process mesohigh rock gas and low pressure natural gas is lost in vain, and does not obtain recycling.It is universal phenomenon that the main line of present natural gas transmission pipeline and the pressure difference between the branch line do not obtain the energy recovery utilization, thereby causes huge energy dissipation, and comprehensive operation cost is higher.At present, at this problem solution is not proposed also.
Summary of the invention
The present invention proposes a kind of technological method that can address this problem and device, and this technology and device can be implemented in and satisfy under original discharge pressure requirement prerequisite, effectively reclaim the pressure difference energy between natural gas line.The energy of these recovery can be used for acting, generating, cold energy use and production LNG Liquefied natural gas.
Technology by gas pressure difference energy recovery proposed by the invention, its working principle is based on the thermomechanics basic theories: containing higher interior energy in the mesohigh rock gas, or gas pressure energy, when the mesohigh natural gas via is crossed the throttling step-down, volume expansion, can discharge a large amount of expansion works, this energy can and should reclaim.
The new energy recovery that the present invention proposes utilizes technology, comprises two kinds of mode of executions:
(1) a kind of is power utilization, promptly directly high-pressure natural gas is sent into gas-turbine, expansion working when high-pressure natural gas passes through gas-turbine, and output mechanical energy can be used for generating electricity etc., and the gas pressure of gas-turbine outlet simultaneously reduces, and satisfies the pressure requirement of downstream use.
(2) another kind is to freeze after making band press natural gas via to cross throttling expansion, realizes the reduction of pressure simultaneously, satisfies the pressure requirement that use in the downstream.
Description of drawings
Technology involved in the present invention is as shown in Figure 1: wherein: 1---the high-pressure natural gas main line; 2---regulator; 3---the low pressure natural gas branch line; 4---pressure energy recovering device (gas-turbine or throttling expansion chiller plant); 5---recovered energy output (cold energy, heat energy, mechanical energy etc.); 6---devices such as acting, generating, refrigeration, production LNG Liquefied natural gas; 7---product output (electric energy, LNG Liquefied natural gas etc.).
Embodiment
Describe below in conjunction with the technology of accompanying drawing gas pressure difference energy recovery involved in the present invention.
The technology of the gas pressure difference energy recovery that the present invention relates to is made up of the utilized device 6 of high-pressure natural gas main line 1, low pressure natural gas branch line 3, pressure difference energy recycle device 4 and recovered energy.This technology is (to connect the device that high-pressure natural gas main line 1 and low pressure natural gas branch line 3 carry out pressure regulation at existing regulator 2, the no recovered energy function of this device) next door is installed in parallel the process pipelines that the present invention proposes, and the utilized device 6 of pressure difference energy recycle device 4 and recovered energy is formed.When the technology of the gas pressure difference energy recovery that comes into operation, close regulator 2, rock gas in the high-pressure natural gas main line 1 enters pressure difference energy recycle device 4, device 4 can utilize pressure difference to carry out energy recovery, and device 4 can be a gas-turbine, utilizes the pressure difference energy work done of high and low pressure rock gas, reclaim and output mechanical energy, device 4 can be the throttling expansion device also, utilizes pressurized gas throttling expansion refrigeration, the cold energy that output produces.The energy 5 (cold energy, heat energy, mechanical energy etc.) that device 4 reclaims can inletting device 6, generates electricity, refrigeration, production LNG Liquefied natural gas etc.Device 4 not only can pressure recovery difference energy, and the gas pressure that installs 4 outlets reduces, can enter low pressure natural gas branch line 3, its pressure meets low pressure natural gas branch line 3 discharge pressure technological requirements, thereby the downstream air feed steadily can not impacted pipe network.When pressure difference energy recycle device 4 in the technology of natural atmospheric pressure difference energy recovery goes wrong or keeps in repair, cut off rock gas turnover pressure difference energy recycle device 4, open regulator 2 simultaneously and guarantee that the downstream air feed steadily can not impact pipe network.
By the above, the technology that the present invention proposes has two kinds of method pressure recovery energy, and first power utilization promptly can be converted into mechanical energy by gas-turbine with gas pressure.But the power equipment acting but also the direct generation of electricity not only can have been driven.It two is to utilize the pressure of pressurized gas to freeze through the decompression back of expanding, but both production LNG Liquefied natural gas can utilize the cryogen that is produced to generate electricity, build freezer or air conditioner refrigerating etc. again.When by after this operation pressure can utilize, when the gas pressure delivery technology that low pressure natural gas pressure meets low pressure natural gas branch line 3 required, this rock gas entered low pressure natural gas branch line 3, thereby finishes the steady conveying air feed between gas distributing system.
The technology of the gas pressure difference energy recovery that the present invention proposes, the pressure that can be used between all rock gas high low pressure pipe networks can reclaim, and when high low pressure pipeline pressure reduction during greater than 0.4MPa, can implement.This technology has wide development and utilization and is worth, and provides useful help for reducing the line transportation energy consumption.
Claims (5)
1. one kind is utilized the main line of natural gas transmission pipeline and the technology that the pressure difference between the branch line is carried out the energy recovery of gas pressure difference, it is characterized in that utilized device 6 at the regulator 2 other pressure difference energy that are installed in parallel pressure difference energy recycle device 4 and reclaim, and corresponding tie line.
2. gas pressure difference energy recycle device 4 according to claim 1 is characterized in that and can carry out energy recovery by dual mode: a kind of is by the gas-turbine work done, and the gas pressure difference can be converted into mechanical energy output; A kind of is by the gas throttling swell refrigeration.
3. gas pressure difference energy utilized device 6 according to claim 1 can be to utilize the generator of generating of mechanical work and compressor, refrigerator or the like; Also can be the various forms of heat exchangers that utilize cold energy, it one of is used be to utilize the cold energy production LNG Liquefied natural gas that reclaims, or in the throttling expansion refrigeration processes direct production LNG Liquefied natural gas.
4. according to the described natural gas pipeline pressure difference of above claim energy recovery technology, when being used to utilize the mechanical work generating, can provide the station required whole electric power, and outside output power; When being used for freezing, can directly producing-170 ℃～0 ℃ cryogen and utilize its cold energy production LNG Liquefied natural gas, or be the freezer cooling by the pressure difference energy recovery.
5. according to the technology of the described gas pressure difference of above claim energy recovery, can use at pipeline pressure reduction any gas transmission line between 0.4MPa～25MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2009101583393A CN101943323A (en) | 2009-07-07 | 2009-07-07 | Natural gas pressure difference energy recovery process |
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| CN2009101583393A CN101943323A (en) | 2009-07-07 | 2009-07-07 | Natural gas pressure difference energy recovery process |
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| CN101943323A true CN101943323A (en) | 2011-01-12 |
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| CN2009101583393A Pending CN101943323A (en) | 2009-07-07 | 2009-07-07 | Natural gas pressure difference energy recovery process |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103184987A (en) * | 2011-12-31 | 2013-07-03 | 新奥科技发展有限公司 | Mobile energy supply equipment based on compressed natural gas |
| CN103185199A (en) * | 2011-12-31 | 2013-07-03 | 新奥科技发展有限公司 | Energy matching system based on compressed gas |
| CN103216278A (en) * | 2012-01-21 | 2013-07-24 | 林牧 | Wellhead natural gas pressure energy power generation system and control method |
| CN103306761A (en) * | 2013-06-27 | 2013-09-18 | 西南石油大学 | Pressure energy power generation system adopting wellhead natural gas |
| CN105041395A (en) * | 2015-08-11 | 2015-11-11 | 浙江浙能节能科技有限公司 | System for recovering and comprehensively utilizing pressure energy of natural gas pipeline network |
| CN105156891A (en) * | 2015-08-27 | 2015-12-16 | 中国石油天然气股份有限公司 | Co-production system based on gas storage |
| CN105698005A (en) * | 2016-01-28 | 2016-06-22 | 侯奕 | Natural gas pressure difference energy recovery-LNG production system and process |
| CN106688906A (en) * | 2017-03-01 | 2017-05-24 | 吕廷伟 | Building-type standard hog house |
| CN106688903A (en) * | 2017-03-01 | 2017-05-24 | 吕廷伟 | Pig excrement and urine separation collection system with excrement cleaning belt |
| CN108757057A (en) * | 2018-06-13 | 2018-11-06 | 郑州朗润智能装备股份有限公司 | It can multigroup connection in series-parallel natural gas line differential pressure generating device |
| CN108952907A (en) * | 2017-09-18 | 2018-12-07 | 国家能源大规模物理储能技术（毕节）研发中心 | A kind of the bleed pressure energy regenerating and utilization technology of CNG natural gas vehicle |
| CN109506130A (en) * | 2018-12-28 | 2019-03-22 | 动能（北京）科技发展有限公司 | The energy recycle device and power generator of pressure difference energy when based on natural gas well gas production |
-
2009
- 2009-07-07 CN CN2009101583393A patent/CN101943323A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103185199B (en) * | 2011-12-31 | 2017-08-08 | 新奥科技发展有限公司 | Energy matching system based on compressed gas |
| CN103185199A (en) * | 2011-12-31 | 2013-07-03 | 新奥科技发展有限公司 | Energy matching system based on compressed gas |
| CN103184987A (en) * | 2011-12-31 | 2013-07-03 | 新奥科技发展有限公司 | Mobile energy supply equipment based on compressed natural gas |
| CN103184987B (en) * | 2011-12-31 | 2016-09-28 | 新奥科技发展有限公司 | Portable energy supply equipment based on compressed natural gas |
| CN103216278A (en) * | 2012-01-21 | 2013-07-24 | 林牧 | Wellhead natural gas pressure energy power generation system and control method |
| CN103306761A (en) * | 2013-06-27 | 2013-09-18 | 西南石油大学 | Pressure energy power generation system adopting wellhead natural gas |
| CN105041395A (en) * | 2015-08-11 | 2015-11-11 | 浙江浙能节能科技有限公司 | System for recovering and comprehensively utilizing pressure energy of natural gas pipeline network |
| CN105156891A (en) * | 2015-08-27 | 2015-12-16 | 中国石油天然气股份有限公司 | Co-production system based on gas storage |
| CN105698005A (en) * | 2016-01-28 | 2016-06-22 | 侯奕 | Natural gas pressure difference energy recovery-LNG production system and process |
| CN106688903A (en) * | 2017-03-01 | 2017-05-24 | 吕廷伟 | Pig excrement and urine separation collection system with excrement cleaning belt |
| CN106688906A (en) * | 2017-03-01 | 2017-05-24 | 吕廷伟 | Building-type standard hog house |
| CN108952907A (en) * | 2017-09-18 | 2018-12-07 | 国家能源大规模物理储能技术（毕节）研发中心 | A kind of the bleed pressure energy regenerating and utilization technology of CNG natural gas vehicle |
| CN108757057A (en) * | 2018-06-13 | 2018-11-06 | 郑州朗润智能装备股份有限公司 | It can multigroup connection in series-parallel natural gas line differential pressure generating device |
| CN109506130A (en) * | 2018-12-28 | 2019-03-22 | 动能（北京）科技发展有限公司 | The energy recycle device and power generator of pressure difference energy when based on natural gas well gas production |
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