CN102797441A - Method and device for exploiting seabed combustible ice - Google Patents
Method and device for exploiting seabed combustible ice Download PDFInfo
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- CN102797441A CN102797441A CN2012103243468A CN201210324346A CN102797441A CN 102797441 A CN102797441 A CN 102797441A CN 2012103243468 A CN2012103243468 A CN 2012103243468A CN 201210324346 A CN201210324346 A CN 201210324346A CN 102797441 A CN102797441 A CN 102797441A
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Abstract
The invention discloses a method and a device for exploiting seabed combustible ice. At present, the methods for researching and exploiting seabed combustible ice overseas mainly include a pyrolysis method, a depressurization method and a replacement method, and in these methods, combustible ice is decomposed on the seabed to collect natural gas, which causes many technical bottlenecks. The method for exploiting seabed combustible ice disclosed by the invention comprises the following steps of: digging seabed combustible ice ores (sludge containing combustible ice) out of sea and pouring the seabed combustible ice ores into an ore storage bin of a boat, and decomposing the combustible ice under normal pressure. The digging manner is large-volume 'quiet' digging by using an ore exploiting shovel, and the seabed is gently agitated only during the digging process; the interior of the ore exploiting shovel is sealed by a steel plate, the opening is covered, and side doors at the both ends are closed during a lifting process, so the combustible ice cannot be scattered; and the combustible ice is decomposed on the boat by using special equipment, so that the natural gas cannot be leaked. By the method and the device disclosed by the invention, no technical difficulty which cannot be solved by human exists, the exploiting cost is equivalent to the cost of overland exploiting for natural gas, and the residual sludge after the decomposition can be filled in reefs to reclaim land.
Description
Technical field the present invention relates to the exploitation method and the device of a kind of seabed combustible ice
The background technology combustible ice, formal name used at school gas hydrates (methane molecule formula CH
4, methane content in the natural gas component＞96%), the combustible ice molecular formula is CH
46H
20.Land combustible ice ore deposit is distributed in high latitude or the high and cold frozen soil layer, and the seabed combustible ice is distributed in the surface, seabed of the depth of water 300～2000m.China has found abundant combustible ice resource at the South Sea, on the south sea God fox marine site be example, mineral reserve area 22km
2, thickness 20m, gas reserves 19,400,000,000 m
3, be worth 70,000,000,000 yuan (RMB).
The occurrence status of seabed combustible ice is: the dark 300～2000m in sea, and pressure 3～20Mpa, 2～3 ℃ of temperature are composed (not being in the stratum below the surface, seabed) in the sedimentary deposit that has the surface, seabed, and the sedimentary deposit of indication is bottom silt (about a moisture content 80%) here.The common area of these bottom silts is several square kilometres, tens meters of thickness or rice up to a hundred, and mud top does not have the megalith cap rock, has only small amount of carbonate reef (thickness 0.5～2m, shape, position irregular).Combustible ice is white in color, and (about 0.5～2cm) shape of particle diameter is evenly distributed in the mud particle.1m
3Combustible ice can decomposite 164m
3Natural gas 0.8m
3Fresh water.Combustible ice ore deposit (mud that contains combustible ice) average abundance is 0.35, then 1m
3The combustible ice ore deposit can be produced: 1m
3(ore deposit) * 0.35*164m
3(gas)/(ore deposit)=57.4m
3(natural gas).
Whole world combustible ice reserves are very abundant, are the 21 century novel energies of generally acknowledging.The seabed combustible ice is found more than 20 year, and exploitation but is a world-famous puzzle.The a large amount of manpowers of western developed country input, financial resources over more than 20 year, exploitation is studied to the seabed combustible ice.Main method has: 1. pyrolysismethod-in mud, dig a well exactly, inject a large amount of hot water, and decompose combustible ice.2. voltage drop method-dig a well to mud extracts the moisture content in the mud with well, to reduce pressure, decomposes combustible ice.3. displacement method-dig a well to mud is injected CO in well
2, let CO
2The displacement combustible ice.Though said method is through research in more than 20 years, test, none achieving success.The reason of failure is: 1. said method all is to decompose combustible ice in the seabed, and pyrolysismethod is to need a large amount of thermals source to whole mud ore bed heating.Voltage drop method is to change the seabed hyperbaric environment, also needs mass energy.Displacement method is with airborne CO
2Liquefaction is injected well and is let CO
2Remove to replace combustible ice, CO
2How to removing to seek the combustible ice particle from all directions, this hardly maybe.Even if 2. said method is decomposed into natural gas to the seabed combustible ice; Natural gas also can only run up, and can not run sidewards in the well and is collected, and it is great technical bottleneck that natural gas is collected; Never solving, also is the basic reason that the seabed combustible ice can't drop into commercial-scale operation so far.
Understanding to seabed combustible ice occurrence condition has been arranged, the understanding to seabed, various countries combustible ice exploitation scientific research progress has been arranged, the present invention could be accurate.
Summary of the invention the present invention breaks through in the seabed and decomposes the intrinsic thinking that combustible ice is collected natural gas, digs combustible ice ore deposit, seabed (mud) and adopts on the ship, decomposes combustible ice aboard ship and collects natural gas.Collect combustible ice ore deposit, seabed on the ship, also have grab bucket method, continuous line bucket method, pump to inhale method, spiral lift method.But it is 10m that the grab bucket method is greatly stressed the mud amount most at every turn
3(developed area has reached 50m
2, owing to the frame for movement reason can't break through 10m
3, the inventor once designed large-scale grab bucket, finally abandoned).The continuous line bucket method is to be fixed on the fake with a lot of little buckets, and the overhead traveling crane runner on the ship drives fake, and little bucket is lifted out the sea one by one after undersea mining, and with the ore deposit aboard ship, the defective of this method is that little bucket capacity amasss very little (about 1m
3), deposition surface is long-pending very big, and in lifting process, seawater scouring mud, combustible ice are easy in lifting process, decompose, and not only can't collect natural gas, also can destroy the marine eco-environment.It all is that mud and seawater are together promoted with the spiral lift method that pump is inhaled method, so not only wastes energy, also can make the combustible ice vigorous agitation, decomposition on the way and can't collecting.
The method that the present invention exploits the seabed combustible ice is with the mining shovel, adopts the seabed combustible ice on the ship, pours in the storage bin and decomposes (resolving device is applied for a patent separately) again.
The mining dredger of the present invention's design has independent power by two, and displacement is 1.5 ten thousand tons a marine ships, and the centre is the technique platform of 30*60m, a binary mining dredger of composition.Technique platform central authorities are moon pools, have around the moon pool to promote to use the well cabinet frame, on the well cabinet frame pulley are installed.Electric winch on the technique platform drives wire rope, and wire rope joins on the cross-axle universal shaft coupling of mining shovel after commutating through pulley.The mining shovel is made round barrel shape, internal diameter>=1.5m, length≤15m.Shovel body front is a teeth, is used for digging loose mud.The front and rear of shovel is respectively joined one group of cross-axle universal shaft coupling, and the wire rope front end is fixed on the Hooks coupling universal coupling.5/6 usefulness steel plate sealing on the internal circumference of mining shovel round barrel shape bucket chamber leaves 1/6 opening and lid to be opened/closed is housed, but there is the side door of switch in round barrel shape bucket chamber in both sides in the longitudinal direction.
Specific embodiment catamaran reaches the predetermined maritime area, starts hoist engine and from moon pool, puts down the mining shovel with wire rope, and after contact to earth (combustible ice mud) was shoveled in mining, load cell and range sensor perception passed to master control room with signal.Catamaran navigates by water forward by the exploitation path that designs; Put down wire rope while advancing, mining shovel is because deadweight can be as you were, the ship certain distance that moves ahead; Ship forms an angle with the line and the horizon of mining shovel; This moment, the state of wire rope was not the straight line between ship and mining shovel, but a parabola (generation sag), because the sag of wire rope just has a horizontal component forward on the mining shovel.After angle is suitable, the tight lifting drum of stopping of the brake on the electric winch, ship puts into high gear to advance, and the mining shovel advances on the bottom silt layer under rope traction.The intensity of mud is very low, and the center of gravity of mining shovel turns forward, and component is vertically downward made the unlikely sinking of mining shovel by the shearing resistance balance that mud makes progress.Also have one to be tilted to component down simultaneously, this component affacts in the mud through the teeth point, and the sharp contact area of teeth is little, and the shear strength of mud is low; Teeth is easy to insert in the mud, and ship moves on, and teeth inserts more and more darker; And have mud to get into the bucket chamber along teeth, the load cell perception adopt completely a pipeful of after, returning to behind the mining dredger mining shovel directly over; Cover with mechanism's (applying for a patent separately) and to advance the ore deposit opening on the scraper bowl, the elevator unit that starts on the technique platform is received wire rope, and the mining of filling the combustible ice ore deposit is evened out and surely is lifted out the water surface; Behind certain altitude (about 5m), an end of mining shovel is motionless, and the other end promotes again; Make its be 30 ° skewed, open side door with manipulator, the combustible ice ore deposit is toppled in the storage bin etc. to be decomposed.
This seabed combustible ice extraction system is that " peace and quiet " are dug and adopted, and only prizes ore bed in the seabed, can not stir and make muddy seawater and influences marine organisms.In lifting process, mining shovel bottom seals, the both sides side door is closed, and opening has been added a cover and has been covered completely, and seawater can not wash away mud, and combustible ice can and not be dissolved in the seawater in the lifting process decomposition, can not destroy marine environment.
The seabed combustible ice exploitation method and the device of the present invention's design; There is not the insurmountable technical barrier of any present mankind; Cost of winning is suitable with land natural gas extraction cost, service life of equipment 15 years, input-output ratio 1: 10; Do not influence environment in the recovery process, really accomplish technology maturation, ambient controlled, with low cost.
Claims (5)
1. the exploitation method and the device of a kind of seabed of the present invention combustible ice is characterized in that: comprise seabed combustible ice exploitation method and seabed combustible ice quarrying apparatus two parts.
2. seabed according to claim 1 combustible ice exploitation method is characterized in that: be the seabed combustible ice to be dug adopt proposition sea, back, decompose combustible ice aboard ship and collect natural gas.
3. seabed according to claim 1 combustible ice quarrying apparatus is characterized in that: seabed combustible ice quarrying apparatus is made up of mining shovel, wire rope, hoisting frame, pulley and electric winch.
4. mining shovel according to claim 3 is characterized in that: the mining shovel is made up of round barrel shape bucket chamber, teeth, cross-axle universal shaft coupling.
5. round barrel shape bucket according to claim 4 chamber is characterized in that: 5/6 usefulness steel plate sealing on the internal circumference of round barrel shape bucket chamber leaves 1/6 opening and lid to be opened/closed is housed, but there is the side door of switch in round barrel shape bucket chamber in both sides in the longitudinal direction.
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|---|---|---|---|
| CN2012103243468A CN102797441A (en) | 2012-09-05 | 2012-09-05 | Method and device for exploiting seabed combustible ice |
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|---|---|---|---|
| CN2012103243468A CN102797441A (en) | 2012-09-05 | 2012-09-05 | Method and device for exploiting seabed combustible ice |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103824501A (en) * | 2014-03-27 | 2014-05-28 | 无锡同春新能源科技有限公司 | Building model of combustible ice processing plant using solar photovoltaic power on island |
| CN105064959A (en) * | 2015-08-14 | 2015-11-18 | 西南石油大学 | Method for green extraction of seabed unstratlfied rock natural gas hydrate |
| CN105715236A (en) * | 2014-08-12 | 2016-06-29 | 成都能生材科技开发有限责任公司 | Environment friendliness and low-pressure super-cold liquefaction combined mining technology for combustible ice well network |
| CN108661605A (en) * | 2017-03-30 | 2018-10-16 | 梁嘉麟 | Methane for seabed combustible ice mineral reserve fragment, which generates, improves A type generating means |
| CN108661606A (en) * | 2017-03-30 | 2018-10-16 | 梁嘉麟 | The methane of seabed combustible ice generates generating means |
-
2012
- 2012-09-05 CN CN2012103243468A patent/CN102797441A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103824501A (en) * | 2014-03-27 | 2014-05-28 | 无锡同春新能源科技有限公司 | Building model of combustible ice processing plant using solar photovoltaic power on island |
| CN103824501B (en) * | 2014-03-27 | 2015-11-04 | 无锡同春新能源科技有限公司 | Island utilizes the BUILDINGS MODELS of the combustible ice processing factory of solar photovoltaic electric power |
| CN105715236A (en) * | 2014-08-12 | 2016-06-29 | 成都能生材科技开发有限责任公司 | Environment friendliness and low-pressure super-cold liquefaction combined mining technology for combustible ice well network |
| CN105715236B (en) * | 2014-08-12 | 2019-08-13 | 成都能生材科技开发有限责任公司仁寿分公司 | The environmental protection united low pressure supercooled liquid production technique of combustible ice well pattern |
| CN105064959A (en) * | 2015-08-14 | 2015-11-18 | 西南石油大学 | Method for green extraction of seabed unstratlfied rock natural gas hydrate |
| CN105064959B (en) * | 2015-08-14 | 2017-12-12 | 西南石油大学 | A kind of lasting exploit method of the non-diagenesis gas hydrates in seabed |
| CN108661605A (en) * | 2017-03-30 | 2018-10-16 | 梁嘉麟 | Methane for seabed combustible ice mineral reserve fragment, which generates, improves A type generating means |
| CN108661606A (en) * | 2017-03-30 | 2018-10-16 | 梁嘉麟 | The methane of seabed combustible ice generates generating means |
| CN108661605B (en) * | 2017-03-30 | 2022-01-18 | 中国计量大学 | Improved A-type generating device for generating methane for fragments of seabed combustible ice mineral reserves |
| CN114016975A (en) * | 2017-03-30 | 2022-02-08 | 梁嘉麟 | Wind power generation method related to exploiting seabed surface exposed combustible ice mineral deposit methane generation device |
| CN114016974A (en) * | 2017-03-30 | 2022-02-08 | 梁嘉麟 | Installation and construction method for exploiting seabed surface exposed combustible ice mineral methane generation device |
| CN108661606B (en) * | 2017-03-30 | 2022-07-19 | 中国计量大学 | Methane generation device for seabed combustible ice |
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Application publication date: 20121128 |