CN201607145U - Coaxial slurry convection heat exchanger - Google Patents

Coaxial slurry convection heat exchanger Download PDF

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Publication number
CN201607145U
CN201607145U CN2009200948441U CN200920094844U CN201607145U CN 201607145 U CN201607145 U CN 201607145U CN 2009200948441 U CN2009200948441 U CN 2009200948441U CN 200920094844 U CN200920094844 U CN 200920094844U CN 201607145 U CN201607145 U CN 201607145U
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China
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heat exchanger
mud
coaxial
pipes
slurry
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Expired - Fee Related
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CN2009200948441U
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Chinese (zh)
Inventor
孙友宏
郭威
徐会文
王庆华
赵江鹏
陈晨
李国圣
贾瑞
赵建国
薛军
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Jilin University
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Jilin University
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Abstract

The utility model relates to a coaxial slurry convection heat exchanger. The arrangement mode of the heat exchange pipes of the heat exchanger is a double-layer or multiple-layer arrangement mode. Inner pipes are sheathed in outer pipes, and the circular space between the inner and outer pipes is a refrigerant circulating channel. The inner pipes are slurry circulating channels, and circulating slurry and refrigerants relatively and inversely flow to form counter-flow heat exchange. The inner pipes are communicated with the inner pipes by U-shape bellows and flanges, the outer pipes are communicated with the outer pipes by short pipes and flanges, and the middle parts of the short pipes are provided with flanges. A slurry inlet and a slurry outlet are arranged at the same end of the slurry convection heat exchanger, and a refrigerant inlet and a refrigerant outlet are arranged at the same side surface of the slurry convection heat exchanger and are communicated with the outer pipes. The outer walls of the outer pipes are coated with thermal insulation materials. Testing proves that the coaxial slurry convection heat exchanger has large surface heat transfer coefficient, good heat exchange effect, can quickly cool the slurry, can bear high pressure and is especially suitable for heat exchange among large-flow, high-velocity and low-temperature or ultralow-temperature fluids. The coaxial slurry convection heat exchanger has the advantages of simple structure, convenient use and low cost.

Description

Coaxial mud convection heat exchanger
Technical field
The utility model relates to a kind of heat-exchanger rig that is applicable to the heat-exchange device that uses low temperature mud to cool off to the gas hydrates drill sampling, especially countercurrent flow.
Background technology
The development and use gas hydrates at first will be obtained the gas hydrates core sample by the drill sampling means, then by analysis to rock core, the geologic parameters such as occurrence, scale and character of assessment gas hydrates storage capacity, gas hydrates ore bed are so drill sampling is the most direct main means of development and use gas hydrates.There is 0～10 ℃ in the gas hydrates tax, and in the stratum of pressure＞10MPa, the temperature of depositing the stratum raises or strata pressure reduction all may causing gas hydrates decompose as long as gas hydrates are composed.The bit cutting rock produces a large amount of heat in the drill sampling work progress, and drilling tool and hole wall friction simultaneously also can produce heat, and temperature raises at the bottom of the hole, these heat transferred drilling muds, and the mud temperature also increases.The rising of mud temperature can cause when drilling through the gas hydrates rock core, gas hydrates decompose, cause the gas hydrates core sample that to take the original position fidelity, not only can influence assessment to the ore bed storage capacity, but also may cause drilling accident and drilling equipment is worked the mischief, so must control drilling employed mud temperature, guarantee that mud temperature and gas hydrates formation temperature are consistent substantially.
The present domestic heat exchanger that also is not specially adapted for mud cools.Existing heat exchanger can be divided into by heat compensator conducting property: direct contact type, dividing wall type.Dividing wall type heat exchanger is divided into again: jacketed type exchanger, submerged coil heat exchanger, spray-type heat exchanger, tubular heat exchanger, double pipe heat exchanger.By medium flow direction be divided into again: down-stream heat exchanger and contra-flow heat exchanger.Direct-contact heat exchanger, promptly cold fluid and hot fluid directly mixes, and is applicable to that generally cold fluid and hot fluid is the heat exchange under the medium situation of the same race, is not suitable for mud cools; , promptly cold fluid and hot fluid is separated by metallic walls, not directly contact.The type of dividing wall type heat exchanger has: jacketed type exchanger, the heat exchanger of this structure are mainly used in the heating or the cooling of course of reaction, are at container outer wall chuck to be installed to make; Submerged coil heat exchanger, this heat exchanger is many with the metal pipe coiled, or makes various situations about adapting with container, and is immersed in the interior liquid of container; Spray-type heat exchanger, the heat exchanger of this structure are used for the hot fluid in the cooling tube more, and coiled pipe in a row is fixed on the rigid frame, and the fluid that is cooled flows in pipe, and cooling water is by evenly drenching in the spray equipment of pipe top down; Tubular heat exchanger, the heat exchanger of this structure is called shell-and-tube heat exchanger again, mostly is heater; Double pipe heat exchanger, the heat exchanger of this structure is dressed up concentric tubes with two kinds of different pipe boxes of diameter, and a kind of fluid is flow through at interior pipe, and is another kind of then pass through in the annular gap between sleeve pipe.The dividing wall type heat exchanger type that is used for the general employing of refrigeration industry has: submerged coil heat exchanger, spray-type heat exchanger, double pipe heat exchanger.For the mud cools problem, the mud temperature will be cooled to subzero, and spray-type heat exchanger is inapplicable, and submerged coil heat exchanger is placed on and takies this in the mud pit with regard to narrow space, and is also inapplicable.Existing coaxial contra-flow heat exchanger mostly is coiled, the structure more complicated, and volume is little, and fluid flow is little.Require flow big for mud cools, the flow velocity height, and mud has wall building property, and promptly mud forms the mud skin at tube wall easily in process of flowing, and existing heat exchanger can not satisfy the cooling under the mud bad working environments condition.
Summary of the invention
The purpose of this utility model is exactly at above-mentioned the deficiencies in the prior art, a kind of be applicable to land frozen soil layer and drilling at the sea construction are provided, are specially adapted to the coaxial mud convection heat exchanger of the gas hydrates drilling mud cooling of gas hydrates drill sampling construction.
The purpose of this utility model is achieved through the following technical solutions:
Coaxial mud convection heat exchanger, each heat exchanger tube arrangement mode of heat exchanger is bilayer or multilayer arrangement mode, interior pipe 1 is sleeved in the outer tube 3, in pipe 1 coaxial with outer tube 3, annulus between two pipes is a refrigerant circulation passage, the annular gap closed at both ends, interior pipe 1 is the mud circulation passage, the relative reverse flow of circulating mud with cold-producing medium, constitute countercurrent flow, be communicated with by flange 7 and U type bellows 4 between interior pipe 1 and the interior pipe 1, be communicated with by short tube 5 and flange 7 between outer tube 3 and the outer tube 3, flange 7 is housed in the middle of the short tube 5, outer tube 3 is welded with support bar 6 and is used to limit distance between two outer tubes 3, and mud import 8 and mud outlet 11 are located at the same end of mud convection heat exchanger, and refrigerant inlet 9 and refrigerant outlet 10 are located at the same side of coaxial mud convection heat exchanger, and be communicated with outer tube 3, the outer wall of outer tube 3 is coated with heat-insulation layer 2 is housed.
The purpose of this utility model can also be achieved through the following technical solutions:
Public four layers of insulation material is followed successively by insulation lacquer, polyurethane foam, hard insulating material and tinfoil from inside to outside; The insulation lacquer adopts bi-component oiliness heat-insulation and heat-preservation priming paint, oil tank insulation lacquer or aquosity heat insulating heat preserving finish paint.Preferred hard rubber of hard insulating material or polyurethane rigid foam plastic watt.Interior pipe 1 inwall is a shiny surface; Cold-producing medium is an ethylene glycol.
Beneficial effect: coaxial mud convection heat exchanger is big through the testing surface heat transfer coefficient, good effect of heat exchange, cooling mud fast, can bear high pressure, be particularly suitable for the heat exchange between big flow, high flow rate low temperature or the ultralow temperature fluid, simple in structure, easy to use, cheap.
Description of drawings
Accompanying drawing 1 is the coaxial mud convection heat exchanger schematic top plan view;
Accompanying drawing 2 is looked schematic diagram for the coaxial mud convection heat exchanger master;
Accompanying drawing 3 is a coaxial mud convection heat exchanger insulation construction schematic diagram;
Accompanying drawing 4 is a coaxial mud convection heat exchanger countercurrent flow schematic diagram;
Accompanying drawing 5 is the coaxial mud convection heat exchanger pattern schematic diagram of arranging.
Accompanying drawing 6 is the sectional view of Fig. 4
Pipe in 1,2 heat-insulation layers, 3 outer tubes, 4U type bellows, 5 short tubes, 6 support, 7 flanges, 8 mud imports, 9 refrigerant outlets, 10 refrigerant inlet, the outlet of 11 mud.
The specific embodiment
Be described in further detail below in conjunction with drawings and Examples:
Coaxial mud convection heat exchanger, each heat exchanger tube arrangement mode of heat exchanger is bilayer or multilayer arrangement mode, interior pipe 1 is sleeved in the outer tube 3, in pipe 1 coaxial with outer tube 3, annulus between two pipes is a refrigerant circulation passage, the annular gap closed at both ends, interior pipe 1 is the mud circulation passage, the relative reverse flow of circulating mud with cold-producing medium, constitute countercurrent flow, be communicated with by flange 7 and U type bellows 4 between interior pipe 1 and the interior pipe 1, be communicated with by short tube 5 and flange 7 between outer tube 3 and the outer tube 3, flange 7 is housed in the middle of the short tube 5, outer tube 3 is welded with support bar 6 and is used to limit distance between two outer tubes 3, and mud import 8 and mud outlet 11 are located at the same end of mud convection heat exchanger, and refrigerant inlet 9 and refrigerant outlet 10 are located at the same side of coaxial mud convection heat exchanger, and be communicated with outer tube 3, the outer wall of outer tube 3 is coated with heat-insulation layer 2 is housed.
Totally four layers of insulation materials are followed successively by insulation lacquer, polyurethane foam, hard insulating material and tinfoil from inside to outside; The preferred hard rubber of hard insulating material; Interior pipe 1 inwall is a shiny surface; Cold-producing medium is an ethylene glycol.
Embodiment 1
The bilayer formula coaxial mud convection heat exchanger of arranging
Interior pipe 1 is the straight length that equal length is arranged with outer tube 3, and interior pipe 1 is sleeved in the outer tube 3, and interior pipe 1 is coaxial with outer tube 3, constitutes one group of coaxial sleeve.Coaxial sleeve parallel arrangement between group and the group, be communicated with by U type bellows 4 and flange 7 between the interior pipe 1 of two adjacent groups coaxial sleeve, outer tube 3 constitutes an annular gap with interior pipe 1, the annular gap two ends of every group of coaxial sleeve are all sealed, one face down bonding connects a short tube 5 in outer tube 3 ends, is communicated with by the short tube 5 of flange 7 with another group coaxial sleeve outer tube 3 welding; Supporting 6 at two groups of coaxial sleeve other ends with one connects, support 6 is isometric with short tube 5, support the distance of two groups of outer tubes 3 of 6 restrictions, make two groups of outer tube 3 keeping parallelisms, outer tube 3 outer surfaces be used to be connected short tube 5 outer surfaces of outer tube 3 and the outer surface application heat-insulation layer 2 of U type bellows 4.The innermost layer of heat-insulation layer 2 is the bi-component oiliness heat-insulation and heat-preservation priming paint that is coated on the outer tube 3, successively to outer wrapping polyurethane foam, hard rubber and tinfoil.Mud import 8 and mud outlet 11 are installed in the same side, and cold-producing medium ethylene glycol import 9 and cold-producing medium ethylene glycol outlet 10 are installed in the same side, and the side of mud entrance point is the cold-producing medium ethylene glycol port of export, and mud port of export side is a cold-producing medium ethylene glycol entrance point.Interior pipe 1 circulatory mediator is a mud, and the circulatory mediator that flows in the annular gap that outer tube 3 and interior pipe 1 constitute is a cold-producing medium ethylene glycol, two media reverse flow, formation countercurrent flow.After each heat exchanger tube connects, be fixed on the steel construction chassis, be transported to the job site during use.Mud in the mud pit is sent into heat exchanger through slush pump, returns mud pit after the cooling again, the heat exchanger mud in the cooling mud place that constantly circulates just, and cooled mud is sent into boring through the rig slush pump again.The import 10 of cold-producing medium ethylene glycol is communicated with the ethylene glycol case through cryogenic liquid pump, and the outlet 9 of cold-producing medium ethylene glycol is logical repeatedly with the ethylene glycol case.
When creeping into, because the bit cutting rock can produce a large amount of heat energy, drilling tool and hole wall friction simultaneously also can produce heat energy, these heat must pass to mud, mud carries these heats to face of land mud pit, send into coaxial mud convection heat exchanger by slush pump again, after the heat exchange cooling, return in the mud pit again.
Cold-producing medium ethylene glycol is pumped to coaxial mud convection heat exchanger cold-producing medium ethylene glycol import 10 from the ethylene glycol case through cryogenic liquid pump, mud heat exchange in heat exchanger annular gap and interior pipe again, after the heat exchange, the ethylene glycol temperature raises, and returns the cooling of ethylene glycol case through cold-producing medium ethylene glycol outlet 9.
Embodiment 2
The multilayer formula coaxial mud convection heat exchanger of arranging.
Interior pipe 1 is the straight length that equal length is arranged with outer tube 3, and interior pipe 1 is sleeved in the outer tube 3, and interior pipe 1 is coaxial with outer tube 3, and outer tube 3 and interior pipe 1 formation one annular gap constitute one group of coaxial sleeve.The annular gap two ends of every group of coaxial sleeve are all sealed, no matter group is that arrange in the plane or vertical plane all is parallel to arranging with coaxial sleeve between organizing, the interior pipe 1 of two adjacent groups coaxial sleeve is communicated with by U type bellows 4 and flange 7, one face down bonding connects a short tube 5 in outer tube 3 ends, is communicated with by the short tube 5 of flange 7 with another group coaxial sleeve outer tube 3 welding; Supporting 6 at two groups of coaxial sleeve other ends with one connects, support 6 is isometric with short tube 5, support the distance of two groups of outer tubes 3 of 6 restrictions, make two groups of outer tube 3 keeping parallelisms, outer tube 3 outer surfaces be used to be connected short tube 5 outer surfaces of outer tube 3 and the outer surface application heat-insulation layer 2 of U type bellows 4.The innermost layer of heat-insulation layer 2 is the oil tank insulation lacquers that are coated on the outer tube 3, successively to outer wrapping polyurethane foam, polyurethane rigid foam plastic watt and tinfoil.The 3rd layer of coaxial sleeve mud import 8 and the outlet of second layer coaxial sleeve mud 11 are communicated with by U type bellows 4 and flange 7, the 3rd layer of coaxial sleeve cold-producing medium ethylene glycol import 9 is communicated with by the short tube 5 of flange 7 with 3 welding of the 3rd layer of outer tube with the outlet 10 of second layer coaxial sleeve cold-producing medium ethylene glycol, the 4th layer, layer 5, so N layer the same manner is communicated with.Cold-producing medium ethylene glycol import 9 is welded on last one deck coaxial sleeve outer tube 3 sides, and mud outlet 11 is arranged on last one deck coaxial sleeve and cold-producing medium ethylene glycol import 9 same ends.The side of mud entrance point is the cold-producing medium ethylene glycol port of export, and mud port of export side is a cold-producing medium ethylene glycol entrance point.Interior pipe 1 circulatory mediator is a mud, and the circulatory mediator that flows in the annular gap that outer tube 3 and interior pipe 1 constitute is a cold-producing medium ethylene glycol, two media reverse flow, formation countercurrent flow.After each heat exchanger tube connects, be fixed on the steel construction chassis, be transported to the job site during use.Mud in the mud pit is sent into heat exchanger through slush pump, returns mud pit after the cooling again, the heat exchanger mud in the cooling mud place that constantly circulates just, and cooled mud is sent into boring through the rig slush pump again.The import 10 of cold-producing medium ethylene glycol is communicated with the ethylene glycol case through cryogenic liquid pump, and the outlet 9 of cold-producing medium ethylene glycol is logical repeatedly with the ethylene glycol case.
When creeping into, because the bit cutting rock can produce a large amount of heat energy, drilling tool and hole wall friction simultaneously also can produce heat energy, these heat must pass to mud, mud carries these heats to face of land mud pit, send into coaxial mud convection heat exchanger by slush pump again, after the heat exchange cooling, return in the mud pit again.
Cold-producing medium ethylene glycol is pumped to coaxial mud convection heat exchanger cold-producing medium ethylene glycol import 10 from the ethylene glycol case through cryogenic liquid pump, mud heat exchange in heat exchanger annular gap and interior pipe again, after the heat exchange, the ethylene glycol temperature raises, and returns the cooling of ethylene glycol case through cold-producing medium ethylene glycol outlet 9.

Claims (5)

1. coaxial mud convection heat exchanger, it is characterized in that, each heat exchanger tube arrangement mode of heat exchanger is that bilayer is arranged or the multilayer arrangement mode, interior pipe (1) is sleeved in the outer tube (3), interior pipe (1) is coaxial with outer tube (3), annulus between two pipes is a refrigerant circulation passage, the annular gap closed at both ends, interior pipe (1) is the mud circulation passage, the relative reverse flow of circulating mud with cold-producing medium, constitute countercurrent flow, in be communicated with by flange (7) and U type bellows (4) between pipe (1) and the interior pipe (1), be communicated with by short tube (5) and flange (7) between outer tube (3) and the outer tube (3), flange (7) is housed in the middle of the short tube (5), outer tube (3) is welded with support bar (6) and is used to limit distance between two outer tubes (3), mud import (8) and mud outlet (11) are located at the same end of mud convection heat exchanger, refrigerant inlet (9) and refrigerant outlet 10 are located at the same side of coaxial mud convection heat exchanger, and are communicated with outer tube (3), and the outer wall of outer tube (3) is coated with heat-insulation layer (2) is housed.
2. according to the described coaxial mud convection heat exchanger of claim 1, it is characterized in that totally four layers of insulation materials are followed successively by insulation lacquer, polyurethane foam, hard insulating material and tinfoil from inside to outside.
3. according to the described coaxial mud convection heat exchanger of claim 2, it is characterized in that the insulation lacquer adopts bi-component oiliness heat-insulation and heat-preservation priming paint, oil tank insulation lacquer or aquosity heat insulating heat preserving finish paint.
4. according to the described coaxial mud convection heat exchanger of claim 2, it is characterized in that preferred hard rubber of hard insulating material or polyurethane rigid foam plastic watt.
5. according to the described coaxial mud convection heat exchanger of claim 1, it is characterized in that interior pipe (1) inwall is a shiny surface, cold-producing medium is an ethylene glycol.
CN2009200948441U 2009-12-01 2009-12-01 Coaxial slurry convection heat exchanger Expired - Fee Related CN201607145U (en)

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Application Number Priority Date Filing Date Title
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102654367A (en) * 2012-04-26 2012-09-05 南京白云化工环境监测有限公司 Double-pipe heat exchanger
CN102798304A (en) * 2011-05-23 2012-11-28 沈军 Carburetor and application
CN104675352A (en) * 2014-12-29 2015-06-03 吉林大学 Low-temperature air foam drilling device and method
CN109269338A (en) * 2018-09-25 2019-01-25 无锡科伦达化工热力装备有限公司 A kind of cycle of higher pressure gas cooler

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102798304A (en) * 2011-05-23 2012-11-28 沈军 Carburetor and application
CN102654367A (en) * 2012-04-26 2012-09-05 南京白云化工环境监测有限公司 Double-pipe heat exchanger
CN104675352A (en) * 2014-12-29 2015-06-03 吉林大学 Low-temperature air foam drilling device and method
CN109269338A (en) * 2018-09-25 2019-01-25 无锡科伦达化工热力装备有限公司 A kind of cycle of higher pressure gas cooler

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20101013

Termination date: 20141201

EXPY Termination of patent right or utility model