CN103742788A - Natural gas transportation method and device thereof based on hydrate technology - Google Patents
Natural gas transportation method and device thereof based on hydrate technology Download PDFInfo
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- CN103742788A CN103742788A CN201410014393.1A CN201410014393A CN103742788A CN 103742788 A CN103742788 A CN 103742788A CN 201410014393 A CN201410014393 A CN 201410014393A CN 103742788 A CN103742788 A CN 103742788A
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Abstract
At present, natural gas is transported mainly by long-distance pipeline transportation in China, but the long-distance pipeline transportation has the shortcomings of being immense in initial investment, high in pipeline pressure and low in safety factors. When natural gas is transported inside pipelines, constant pressing is needed, so that the pressure of the end of the pipelines and city gate stations can reach 30 Mpa. Accordingly, requirements of the pipeline are extremely high. As the time goes by, the rigidity and flexibility of the pipelines are reduced due to the facts that the pipelines are oxidized, corroded by water vapor and hydrogen sulfide in natural gas and abraded by mixed solid particles, so that potential risks and economic benefit of the pipelines are very challenging. The invention provides a natural gas transportation method and a device thereof based on hydrate technology, and the natural gas transportation is characterized by being high in transportation capacity, high in safety factors, low in preset requirements and cost, and applicable to middle and long-distance (1000 to 12000 km) natural gas transportation.
Description
Technical field
The present invention relates to a kind of length apart from natural gas transport method, is that employing Hydrate Technology is that gas hydrates are carried object to reach long distance by conversion of natural gas, belongs to field of energy source developing technology.
Background technique
China and even world's natural gas transport mainly still rely on the long distance of natural gas line to carry at present, although pipeline transport technology comparative maturity, but because conduit running pressure is large, and initial stage input is high, makes like this rock gas long-distance transportation bring very large requirement.Except pipeline is carried, compressed natural gas, absorbed natural gas, also there are some shortcomings in LNG Technology, compressed natural gas investment cost is high, poor stability, and the absorbed natural gas method sorbent life-span is short, the adsorption and desorption time is long, and LNG Liquefied natural gas pressure is high, and cost is high.Gas extraction utilize cause should with its conveying technology cause synchronized development.Natural Gas Hydrate Technology is large with its reserves, safety coefficient is high, pretreatment requirement is low, expense is low arises at the historic moment.Present stage, Hydrate Technology is also immature, need to constantly improve.
Summary of the invention
The invention provides a kind of natural gas transport method and apparatus based on Hydrate Technology.This device is comprised of three parts: 1. hydrate forms device, mainly by: note process water device (1); Rock gas and water mixing device (2); Multiphase flow control valve (3); Reactor (4); Refrigeration cabinet (5); Decompressor (6); Blank chamber (7) forms; 2. hydrate conveying arrangement; 3. hydrate is preserved and gasification installation again, mainly by hydrate products storage chamber (9); Hydrate solids shredder (10); Tower (11) again gasifies; Filtrate recovering device (12); Supercharging device (13) forms.
Accompanying drawing explanation
Fig. 1 is a kind of natural gas transport device based on Hydrate Technology.
Embodiment
Rock gas has experienced two processes in long-distance transportation process: 1. rock gas generates hydrate process; 2. hydrate gasifies as rock gas process again.Idiographic flow is that rock gas mixes with process water, after the series of process such as cooling decompression, meeting the hydrate of making under hydrate formation conditions for natural gases, wherein hydrate is shaped in blank chamber (7), then through conveying arrangement (8), be sent to gasification plant again, last hydrate gasifies as rock gas is for user again.Hydrate feedway (8) is that automobile or railway are carried, and hydrate finished product is carried toward from user, the natural gas supply factory close to makes it to gasify as rock gas is for user again.Hydrate feedway (8) is that automobile or railway are carried, and hydrate finished product is carried toward from user, the natural gas supply factory close to makes it to gasify as rock gas is for user again.Hydrate products storage chamber (9) can be according to hydrate at 0.1MPa, and storage-stable reaches to determine and deposits requirement at-15 ℃.Blank chamber makes to be sent to hydrate products storage chamber (9) by feedway after the spherical hydrate of finished product and then through hydrate solids shredder (10), to pulverize as entering the tower that gasifies again (11) after nuggets shape and collect rock gas, rock gas after the tower that gasifies again (11) gasification is sent to urban pipe network after just can pressurizeing after gas separation is dry in gasification tower, for user.
When prepared by rock gas, need to lower the temperature and reduce pressure, experiment records gas hydrates can be at 2～6MPa, and preparation, compares with LNG Liquefied natural gas and in preparation technology, avoided ultralow temperature link at 0～20 ℃.Decompression be because the rock gas that transports of pipeline generally in high pressure (> 10MPa).First lowering the temperature reduces pressure is afterwards because gaseous substance temperature reduces, and the obvious decrease reason of pressure, therefore must first lower the temperature and reduce pressure afterwards.
Hydrate feedway (8) is that automobile or railway are carried, and hydrate finished product is carried toward from user, the natural gas supply factory close to makes it to gasify as rock gas is for user again.
Hydrate products storage chamber (9) can be according to hydrate at 0.1MPa, and storage-stable reaches to determine and deposits requirement at-15 ℃.
Blank chamber (7) is hydrate shaping place, although prepare hydrate at 0～20 ℃, in order to shorten preparation time, should make blank room temperature more much lower than hydrate-formation temperature, and actual temp should be formulated according to blank size.Due under same volume, spherome surface is long-pending minimum again, and therefore, for reducing the decomposition of hydrate, should make blank is spherical form.
The tower that gasifies again (11) is front will be pulverized as nuggets shape is to increase breakdown area through hydrate solids shredder (10) described hydrate entering, and accelerate gasification rate again.
Claims (6)
1. the natural gas transport method and apparatus based on Hydrate Technology, the device adopting in method comprises: note process water device (1); Rock gas and water mixing device (2); Multiphase flow control valve (3); Reactor (4); Refrigeration cabinet (5); Decompressor (6); Blank chamber (7); Hydrate feedway (8); Hydrate products storage chamber (9); Hydrate solids shredder (10); Tower (11) again gasifies; Filtrate recovering device (12); Supercharging device (13); Natural gas user (14).It is characterized in that: rock gas has experienced two processes in long-distance transportation process: 1. rock gas generates hydrate process; 2. hydrate gasifies as rock gas process again.Idiographic flow is that rock gas mixes with process water, after the series of process such as cooling decompression, meeting the hydrate of making under hydrate formation conditions for natural gases, wherein hydrate is shaped in blank chamber (7), then through conveying arrangement (8), be sent to gasification plant again, last hydrate gasifies as rock gas is for user again.
2. described in claim 1: need to lower the temperature and reduce pressure when prepared by rock gas, experiment records gas hydrates can be at 2～6MPa, and preparation, compares with LNG Liquefied natural gas and avoided ultralow temperature link in preparation technology at 0～20 ℃.Decompression be because the rock gas that transports of pipeline generally in high pressure (> 10MPa).First lowering the temperature reduces pressure is afterwards because gaseous substance temperature reduces, and the obvious decrease reason of pressure, therefore must first lower the temperature and reduce pressure afterwards.
3., described in claim 1: hydrate feedway (8) is that automobile or railway are carried, hydrate finished product is carried toward from user, the natural gas supply factory close to makes it to gasify as rock gas is for user again.
4., described in claim 1: hydrate products storage chamber (9) can be according to hydrate at 0.1MPa, storage-stable reaches to determine and deposits requirement at-15 ℃.
5. described in claim 1, blank chamber (7) are hydrate shaping place, although prepare hydrate at 0～20 ℃, in order to shorten preparation time, should make blank room temperature more much lower than hydrate-formation temperature, and actual temp should be formulated according to blank size.Due under same volume, spherome surface is long-pending minimum again, and therefore, for reducing the decomposition of hydrate, should make blank is spherical form.
Described in claim 1 hydrate the tower that gasifies again (11) is front will be pulverized as nuggets shape is to increase breakdown area through hydrate solids shredder (10) entering, accelerate gasification rate again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410014393.1A CN103742788A (en) | 2014-01-13 | 2014-01-13 | Natural gas transportation method and device thereof based on hydrate technology |
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| CN201410014393.1A CN103742788A (en) | 2014-01-13 | 2014-01-13 | Natural gas transportation method and device thereof based on hydrate technology |
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| CN103742788A true CN103742788A (en) | 2014-04-23 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105257985A (en) * | 2015-09-23 | 2016-01-20 | 辽宁石油化工大学 | Natural gas hydrate pipeline transportation method and device |
| CN111849574A (en) * | 2020-07-20 | 2020-10-30 | 常州大学 | Device and method for storing and transporting natural gas based on hydrate method |
| CN112213220A (en) * | 2020-09-27 | 2021-01-12 | 西南石油大学 | Device and method for measuring erosion and friction coefficient of sand-containing hydrate slurry to pipeline |
-
2014
- 2014-01-13 CN CN201410014393.1A patent/CN103742788A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105257985A (en) * | 2015-09-23 | 2016-01-20 | 辽宁石油化工大学 | Natural gas hydrate pipeline transportation method and device |
| CN111849574A (en) * | 2020-07-20 | 2020-10-30 | 常州大学 | Device and method for storing and transporting natural gas based on hydrate method |
| CN112213220A (en) * | 2020-09-27 | 2021-01-12 | 西南石油大学 | Device and method for measuring erosion and friction coefficient of sand-containing hydrate slurry to pipeline |
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Application publication date: 20140423 |