CN110645555A - Supercritical hydrothermal combustion device suitable for high-viscosity fuel - Google Patents
Supercritical hydrothermal combustion device suitable for high-viscosity fuel Download PDFInfo
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- CN110645555A CN110645555A CN201911006820.0A CN201911006820A CN110645555A CN 110645555 A CN110645555 A CN 110645555A CN 201911006820 A CN201911006820 A CN 201911006820A CN 110645555 A CN110645555 A CN 110645555A
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 112
- 239000000446 fuel Substances 0.000 title claims abstract description 87
- 239000000376 reactant Substances 0.000 claims abstract description 57
- 239000007800 oxidant agent Substances 0.000 claims abstract description 34
- 230000001590 oxidative effect Effects 0.000 claims abstract description 34
- 238000001816 cooling Methods 0.000 claims abstract description 24
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 230000000087 stabilizing effect Effects 0.000 claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 239000010779 crude oil Substances 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 239000011819 refractory material Substances 0.000 claims description 4
- 239000003250 coal slurry Substances 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 3
- 239000002283 diesel fuel Substances 0.000 claims description 3
- 239000003502 gasoline Substances 0.000 claims description 3
- 239000003921 oil Substances 0.000 abstract description 18
- 238000011084 recovery Methods 0.000 abstract description 10
- 239000000295 fuel oil Substances 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- 238000010793 Steam injection (oil industry) Methods 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 description 6
- 239000012530 fluid Substances 0.000 description 6
- 238000010796 Steam-assisted gravity drainage Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000010795 Steam Flooding Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B3/00—Other methods of steam generation; Steam boilers not provided for in other groups of this subclass
- F22B3/08—Other methods of steam generation; Steam boilers not provided for in other groups of this subclass at critical or supercritical pressure values
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
- E21B43/243—Combustion in situ
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- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Thermal Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Spray-Type Burners (AREA)
Abstract
The utility model provides a supercritical hydrothermal combustion apparatus suitable for high viscosity fuel, mainly by the upper end cover, the middle part end cover, it forms to connect gradually the assembly with combustion chamber main part two to stabilize combustion chamber main part one, be equipped with the one-level fuel entry on the upper end cover, high energy heating rod and one-level oxidant entry, be equipped with the second grade fuel entry on the middle part end cover, second grade oxidant entry and reactant one-level nozzle, reactant one-level nozzle and one-level fuel entry intercommunication, it is double-deck spiral wall to stabilize combustion chamber main part one inner wall, the bottom is equipped with the second grade nozzle that communicates with second grade fuel entry and second grade oxidant entry, two inner walls of combustion chamber main part are the double helix cooling wall, the bottom is equipped with the outlet port crowd, finally form the steady combustion chamber between one-level nozzle and second grade nozzle, form the combustion chamber between second grade nozzle and the outlet port crowd. The invention solves the problems of high energy consumption and large pollution in the steam injection process of the heavy oil thermal recovery ground boiler by directly generating steam in the oil layer.
Description
Technical Field
The invention belongs to the technical field of thickened oil exploitation, and particularly relates to a supercritical hydrothermal combustion device suitable for high-viscosity fuels.
Background
For the heavy oil thermal recovery technology, the steam injection boiler on the ground is mainly adopted to generate steam in the current oil field, and the steam injection is performed underground to implement steam huff and puff, steam flooding or Steam Assisted Gravity Drainage (SAGD). However, the above approach has the following major problems: (1) the heat loss is large. The smoke exhaust loss of the ground steam generating device is about 20 percent, the heat loss of the ground gas transmission pipeline is about 15 percent, the heat loss of the injected shaft is about 10 percent per kilometer, and the overall heat efficiency is low; (2) the reservoir depth is limited. The application depth of steam removal huff and puff reaches 1800 meters, and the steam flooding and SAGD technology with higher recovery efficiency is mainly applied to oil reservoirs with the depth within 1200 meters. (3) The ground steam generating device occupies a large area. The device can not be arranged on an offshore oil exploitation platform with limited space, and the exploitation of offshore heavy oil is limited.
The supercritical hydrothermal combustion is a novel combustion mode in which fuel or organic waste with a certain concentration and an oxidant generate a violent oxidation reaction in a supercritical water (T is more than or equal to 374.15 ℃ and p is more than or equal to 22.12MPa), and the flame is supercritical hydrothermal flame. Supercritical hydrothermal flame is usually above 800 ℃, and the degradation of organic matters is remarkably accelerated by local high temperature in a hydrothermal flame area (most of organic matters can be degraded within 100 milliseconds), so that a large amount of heat is released, and even the supercritical hydrothermal flame can be used as a means for obtaining energy. This combustion mode has several significant advantages, (1) has millisecond reaction rates. (2) The reactor has high heat exchange efficiency and compact structure, and is particularly suitable for being used as a source of underground steam. (3) The reaction product is only CO2And water vapor, no pollution, and CO2Can reduce viscosity actively, further improve development effect and realize 100 percent utilization of products. The oil extraction technology with multiple thermal fluids is characterized by that the fuel and oxidant are injected into downhole multiple thermal fluid generator, and combusted in high-pressure closed environment to gasify water, and the gas (N) is used2And CO2) The synergistic effect of the additive and steam is realized through gas dissolution viscosity reduction, gas pressurization,A technique for exploiting crude oil by mechanisms of heating viscosity reduction, gas-assisted crude oil gravity drive and the like.
The supercritical hydrothermal combustion type underground steam generation technology formed by combining a multi-hot fluid oil production technology and a supercritical hydrothermal combustion technology can realize higher recovery ratio and safety of thick oil, is not limited by well depth, liberates a large amount of oil layers, perfectly solves development of medium-deep thick oil, and overcomes the problems of high energy consumption and high pollution caused by a steam generation mode of a traditional boiler. In the field of oil exploitation, high-viscosity oil such as crude oil is abundant. The successful application of the supercritical water heat combustion type underground steam generation technology which takes crude oil and the like as fuels cannot leave the development and design of the supercritical water heat combustion device with high-viscosity fuel applicability.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide an active cooling type supercritical water heat combustion device suitable for high-viscosity fuel, and aims to solve the problems of high energy consumption and high pollution of a gas injection boiler in the process of heavy oil thermal recovery and steam injection.
In order to achieve the purpose, the invention adopts the technical scheme that:
a supercritical hydrothermal combustion device suitable for high-viscosity fuels is mainly formed by sequentially connecting and assembling an upper end cover, a middle end cover, a first combustion chamber main body and a second combustion chamber main body, wherein the upper end cover is provided with a first-stage fuel inlet, a high-energy heating rod and a first-stage oxidant inlet, the middle end cover is provided with a second-stage fuel inlet, a second-stage oxidant inlet and a reactant first-stage nozzle, the reactant first-stage nozzle is communicated with the first-stage fuel inlet, the inner wall of the first combustion chamber main body is a double-layer spiral wall, the bottom end of the first combustion chamber main body is provided with a reactant second-stage nozzle communicated with the second-stage fuel inlet and the second-stage oxidant inlet, the inner wall of the second combustion chamber main body is a double-spiral cooling wall, the bottom end of the second combustion chamber main body is provided with an outlet hole group, a combustion chamber is, a mixing chamber is formed between the group of outlet holes and the outlet at the bottom of the reactor.
Namely, the top of the stable combustion chamber is provided with a high-energy heating rod and a reactant primary nozzle, the middle upper part is provided with an annular stable combustion wall, and the lower part is fixed with a double-layer spiral wall; and a reactant secondary nozzle is arranged between the combustion chamber and the combustion stabilizing chamber, the periphery of the combustion chamber is surrounded by a combustion chamber double-helix cooling wall, and a mixing chamber is arranged in the area between the outlet hole group and the outlet at the bottom of the reactor.
The invention is further improved in that the high-energy heating rod is arranged in the central cavity of the upper end cover, penetrates through the central cavity of the middle end cover and is in contact with the back of the reactant primary nozzle, the primary fuel inlet is communicated with the central cavity of the upper end cover at an inclined angle, and the primary oxidant inlet penetrates through the upper end cover and the middle end cover and is communicated with the reactant primary nozzle or the combustion stabilizing chamber.
The invention is further improved in that the reactant secondary nozzle is arranged in two rows of annular holes, wherein a secondary oxidant inlet is spirally communicated with the inner row of annular holes of the reactant secondary nozzle through an inner layer of the double-layer spiral wall, a secondary fuel inlet is spirally communicated with the outer row of annular holes of the reactant secondary nozzle through an outer layer of the double-layer spiral wall, the central lines of the two rows of annular holes of the reactant secondary nozzle are intersected at one point, and the intersection point is positioned in the combustion chamber.
The invention is further improved in that the middle end cover is provided with a cold fuel inlet, and the cold fuel inlet penetrates through the side walls of the middle end cover and the combustion stabilizing chamber main body I in a straight hole mode and is communicated with the inner layer of the double-spiral cooling wall.
The invention is further improved in that the tee joint outside the inner-layer tie-back device of the double-spiral cooling wall is connected with the primary fuel inlet and the secondary fuel inlet. Therefore, the whole reactor adopts an active cooling mode, fuel flow directly reaches the double-helix cooling wall through the straight hole after entering from the cold fuel inlet, and reaches the tee joint for redistribution after flowing back through the straight hole.
The invention is further improved in that the double-helix cooling wall basically covers the interior of the combustion chamber main body II, is fixed in a clamping groove mode, is contracted and closed at the bottom, and is provided with a plurality of outlet hole groups with certain angles as high-temperature reactant spraying ports.
The invention is further improved in that the inner wall of the middle lower part of the middle end cover is an annular combustion stabilizing wall which is made of refractory materials and has a sudden expansion structure, the annular combustion stabilizing wall is fixed in a bolt and top plate mode and is integrally horn-shaped, and the reactant primary nozzle is positioned above the area where the annular combustion stabilizing wall is located.
In a further improvement of the present invention, the reactant-stage nozzle is a replaceable spiral nozzle, but not limited to a spiral nozzle, and the fuel includes, but is not limited to, crude oil, diesel oil, gasoline, coal slurry, ethanol.
The invention is further improved in that the high-energy heating rod is made of corrosion-resistant materials and is fixed at the upper end cover in a threaded mode and extends to the upper part of the reactant primary nozzle.
The invention is further improved in that various throttling and pressure controlling structures are involved in the device of the invention: the fuel entering from the primary fuel inlet and the oxidant entering from the primary oxidant inlet are mixed and then pass through the annular combustion stabilizing wall with the sudden expansion structure, and the whole reactant secondary nozzle is in a Laval nozzle form; the outlet hole group is closed, and the bottom of the combustion chamber is also in a closing structure.
Compared with the prior art, the invention has at least the following beneficial effects:
1. the heat energy utilization rate is high. The supercritical water heat combustion device is placed at the bottom of a well, after the fuel and the oxidant are subjected to hydrothermal combustion reaction, the formed high-temperature hot fluid is directly contacted with an underground stratum after underground temperature and pressure adjustment to supply heat, so that the heat loss in the process of conveying the traditional ground steam to the underground is avoided, and a feasible high-heat-utilization-rate oil extraction scheme and equipment are provided for deep wells, ultra-deep wells and offshore heavy oil exploitation.
2. And various combustion stabilizing measures are taken. The fuel flow and the oxidant flow in the reactor are respectively divided into two stages, wherein the first-stage reactant flow is used for ignition and stable combustion, and the second stage reactant flow is used for releasing energy; the middle end cover is fixed with refractory material near the nozzle and used for absorbing heat to stabilize combustion in the combustion process; the top of the device is provided with a high-energy heating rod to realize necessary preliminary preheating of the feeding of the device; the nozzle structure can ensure that the fuel and the oxidant are fully mixed and react.
3. And various pressure control measures are taken. Aiming at the requirements of a hydrothermal combustion process on supercritical pressure and the requirement of a stratum on a low-pressure thermal fluid, multiple throttling and pressure-controlling structures are arranged inside the equipment, and perfect matching between the two structures is realized on the same equipment.
4. The composite cooling wall separates fuel and oxidant materials, and absorbs heat released by combustion for preheating, so that energy is saved, the purpose of protecting the pressure-bearing wall surface of equipment is achieved, the device is prevented from being burnt at high temperature and even exploding, and safety is ensured.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
Wherein: a1-a stable combustion chamber, A2-a combustion chamber, A3-a mixing chamber, 1-a first-stage fuel inlet, 2-a second-stage fuel inlet, 3-a bolt group, 4-a double-spiral cooling wall, 5-a high-energy heating rod, 6-a first-stage oxidant inlet, 7-an upper end cover, 8-a second-stage oxidant inlet, 9-a cold fuel inlet, 10-a middle end cover, 11-a reactant first-stage nozzle, 12-an annular stable combustion wall, 13-a stable combustion chamber main body I, 14-a double-layer spiral wall, 15-a reactant second-stage nozzle, 16-a combustion chamber main body II, 17-an outlet hole group, 18-a bottom outlet and 19-a tee joint.
FIG. 2 is a partially enlarged (upper) view of the supercritical hydrothermal flame generator.
FIG. 3 is a partial (middle) enlarged view of the supercritical hydrothermal flame generator.
Fig. 4 is a partially enlarged (lower) view of the supercritical hydrothermal flame generator.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the drawings and examples.
As shown in fig. 1, fig. 2, fig. 3 and fig. 4, the supercritical hydrothermal combustion device suitable for high-viscosity fuel of the present invention can use crude oil, diesel oil, gasoline, coal slurry or ethanol as fuel, and is mainly composed of four main components which are sequentially connected and assembled by a bolt group 3: the combustion chamber comprises an upper end cover 7, a middle end cover 10, a first combustion chamber main body 13 and a second combustion chamber main body 16.
Wherein, the upper end cover 7 is provided with a first-stage fuel inlet 1, a high-energy heating rod 5 and a first-stage oxidant inlet 6, the middle end cover 10 is provided with a second-stage fuel inlet 2, a second-stage oxidant inlet 8 and a reactant first-stage nozzle 11, and a cold fuel inlet 9 can be further added, the reactant first-stage nozzle 11 is communicated with the first-stage fuel inlet 1, the inner wall of the first combustion chamber main body 13 is a double-layer spiral wall 14, the bottom end of the first combustion chamber main body is provided with a reactant second-stage nozzle 15 communicated with the second-stage fuel inlet 2 and the second-stage oxidant inlet 8, the inner wall of the second combustion chamber main body 16 is a double-spiral cooling wall 4, the double-spiral cooling wall 4 basically covers the inside of the second combustion chamber main body 16 and is fixed in a clamping groove mode, the bottom end of the second combustion. Finally, a combustion stabilizing chamber A1 is formed between the reactant primary nozzle 11 and the reactant secondary nozzle 15, a combustion chamber A2 is formed between the reactant secondary nozzle 15 and the outlet hole group 17, a mixing chamber A3 is formed between the outlet hole group 17 and the reactor bottom outlet 19, and the combustion stabilizing chamber A1, the combustion chamber A2 and the mixing chamber A3 are three main functional areas inside the hydrothermal combustion device.
The high-energy heating rod 5 is made of corrosion-resistant materials, is arranged in a central cavity of the upper end cover 7, is fixed in a threaded mode, penetrates through the central cavity of the middle end cover 10, and extends to be contacted with the back of the reactant primary nozzle 11, the primary fuel inlet 1 is communicated with the central cavity of the upper end cover 7 at an inclined angle, and the primary oxidant inlet 6 penetrates through the upper end cover 7 and the middle end cover 10 and is communicated with the reactant primary nozzle 11 or the combustion stabilizing chamber A1.
The reactant primary nozzle 11 can be a replaceable spiral nozzle, the reactant secondary nozzle 15 is integrally in the form of a laval nozzle and is arranged in two rows of annular holes, wherein the secondary oxidant inlet 8 is spirally communicated with the inner row of annular holes of the reactant secondary nozzle 15 through the inner layer of the double-layer spiral wall 14, the secondary fuel inlet 2 is spirally communicated with the outer row of annular holes of the reactant secondary nozzle 15 through the outer layer of the double-layer spiral wall 14, the central lines of the two rows of annular holes of the reactant secondary nozzle 15 intersect at one point, and the intersection point is located in the combustion chamber a 2.
When the cold fuel inlet 9 is additionally arranged, the cold fuel inlet 9 can penetrate through the side walls of the middle end cover 10 and the first combustion stabilizing chamber main body 13 in a straight hole mode and is communicated with the inner layer of the double-spiral cooling wall 4. Meanwhile, the inner layer of the double-helix cooling wall 4 can be connected with a tee 19 outside the device, and the tee 19 is connected with the primary fuel inlet 1 and the secondary fuel inlet 2. At the moment, the whole reactor adopts an active cooling mode, and fuel flow directly reaches the double-helix cooling wall 4 through the straight hole after entering from the cold fuel inlet 9, and reaches the tee joint 19 for redistribution after flowing back through the straight hole.
The inner wall of the middle lower part of the middle end cover 10 can be set as an annular combustion stabilizing wall 12 which is made of refractory materials and has a sudden expansion structure, the annular combustion stabilizing wall 12 is fixed in a bolt and top plate mode and is horn-shaped as a whole, and the reactant primary nozzle 11 is positioned above the area where the annular combustion stabilizing wall 12 is positioned.
Therefore, the device of the invention relates to various throttling and pressure controlling structures: the fuel entering from the primary fuel inlet 1 and the oxidant entering from the primary oxidant inlet 6 are mixed and then pass through the annular combustion stabilizing wall 12 with a sudden expansion structure, and the whole reactant secondary nozzle 15 is in a Laval nozzle form; the outlet hole group 17 is closed, and the bottom of the combustion chamber A2 is also in a closing structure.
That is, in the invention, the top of the combustion stabilizing chamber A1 is provided with a high-energy heating rod 5 and a reactant first-stage nozzle 11 which are fixed by screw threads, the middle upper part is provided with an annular combustion stabilizing wall 12, and the lower part is provided with a double-layer spiral wall 14; a reactant secondary nozzle 15 is arranged between the combustion chamber A2 and the combustion stabilizing chamber A1, a combustion chamber double-helix cooling wall 4 is arranged around the combustion chamber A2, and a mixing chamber A3 is arranged in the area between the outlet of the cooling wall subjected to shrinkage treatment and the outlet of the reactor.
According to the above structure, the starting mode of the present invention: the high energy heating rod 5 is started to initially preheat the primary fuel entering from the primary fuel inlet 1, and the control flow is as low as possible. The primary fuel sprayed through the primary reactant nozzle 11 (atomizing nozzle) and the primary oxidant sprayed spirally are mixed and reacted near the annular combustion stabilizing wall 12 to realize ignition. The secondary fuel and the secondary oxidant with higher flow rate respectively flow through the double-layer spiral wall 14, are sprayed out from the reactant secondary nozzle 15, are converged at one point to react, and release heat in a large amount after combustion. After stable combustion, the mass fraction of the fuel is reduced, the water content is improved while the combustion is ensured to be continuous, and thus the yield of high-temperature steam is improved.
When the cold fuel inlet 9 is arranged, before the high-energy heating rod 5 is started, cold fuel is firstly introduced from the cold fuel inlet 9, after the inner layer of the double-helix cooling wall 4 is filled with the cold fuel, the high-energy heating rod 5 is started, and then the combustor is cooled by using an active cooling mode.
In conclusion, aiming at the problems of high energy consumption and high pollution of the thick oil thermal recovery process based on the ground gas injection boiler, the invention provides supercritical water thermal combustion equipment which can generate multi-element hot fluid in ultra-deep wells and on the seabed and has high viscosity fuel applicability by considering the convenience of local materials taking crude oil as fuel in the oil recovery field, thereby avoiding huge heat loss in the ground gas production-injection underground conveying process, providing a feasible oil recovery scheme and equipment for deep wells, ultra-deep wells and offshore thick oil recovery, and breaking through the well depth limitation of thick oil thermal recovery.
Claims (10)
1. A supercritical hydrothermal combustion device suitable for high-viscosity fuels is characterized by mainly comprising four main body components, namely an upper end cover (7), a middle end cover (10), a first combustion chamber main body (13) and a second combustion chamber main body (16), which are sequentially connected and assembled, wherein the upper end cover (7) is provided with a first-level fuel inlet (1), a high-energy heating rod (5) and a first-level oxidant inlet (6), the middle end cover (10) is provided with a second-level fuel inlet (2), a second-level oxidant inlet (8) and a first-level reactant nozzle (11), the first reactant nozzle (11) is communicated with the first-level fuel inlet (1), the inner wall of the first combustion chamber main body (13) is a double-layer spiral wall (14), the bottom end of the first combustion chamber main body is provided with a second-level reactant nozzle (15) communicated with the second-level fuel inlet (2) and the second-level oxidant inlet (8), and the inner wall of the second, the bottom end of the reactor is provided with an outlet hole group (17), a combustion stabilizing chamber (A1) is finally formed between the reactant primary nozzle (11) and the reactant secondary nozzle (15), a combustion chamber (A2) is formed between the reactant secondary nozzle (15) and the outlet hole group (17), and a mixing chamber (A3) is formed between the outlet hole group (17) and the outlet (19) at the bottom of the reactor.
2. The supercritical water heating combustion device suitable for high-viscosity fuel according to claim 1 is characterized in that the high-energy heating rod (5) is arranged in a central cavity of the upper end cover (7) and penetrates through the central cavity of the middle end cover (10) to be in contact with the back of the reactant primary nozzle (11), the primary fuel inlet (1) is communicated with the central cavity of the upper end cover (7) at an inclined angle, and the primary oxidant inlet (6) penetrates through the upper end cover (7) and the middle end cover (10) to be communicated with the reactant primary nozzle (11) or the combustion stabilizing chamber (A1).
3. The supercritical water heating combustion apparatus suitable for high viscosity fuel as claimed in claim 1, wherein the reactant secondary nozzle (15) is arranged in two rows of annular holes, wherein the secondary oxidant inlet (8) is in spiral communication with the inner row annular hole of the reactant secondary nozzle (15) via the inner layer of the double-layer spiral wall (14), the secondary fuel inlet (2) is in spiral communication with the outer row annular hole of the reactant secondary nozzle (15) via the outer layer of the double-layer spiral wall (14), the two rows of annular hole center lines of the reactant secondary nozzle (15) intersect at one point, and the intersection point is located in the combustion chamber (A2).
4. The supercritical water heating combustion device suitable for high-viscosity fuels as claimed in claim 1, wherein the middle end cover (10) is provided with a cold fuel inlet (9), and the cold fuel inlet (9) penetrates through the side walls of the middle end cover (10) and the combustion stabilizing chamber main body I (13) in a straight hole manner and is communicated with the inner layer of the double-helix cooling wall (4).
5. Supercritical water thermal combustion device suitable for high-viscosity fuels according to claim 1 or 4, characterized by a tee (19) outside the device connected back to the inner layer of the double-helix cooling wall (4), wherein the tee (19) is connected with the primary fuel inlet (1) and the secondary fuel inlet (2).
6. The supercritical water heating combustion apparatus suitable for high-viscosity fuel according to claim 1 or 4, characterized in that the double-helix cooling wall (4) substantially covers the inside of the combustion chamber main body two (16), is fixed in a clamping groove manner, has a bottom part shrunk and closed, and is provided with a plurality of outlet hole groups (17) with certain angles as high-temperature reactant ejection holes.
7. The supercritical water heating combustion device suitable for high-viscosity fuels is characterized in that the inner wall of the middle lower part of the middle end cover (10) is an annular combustion stabilizing wall (12) which is made of refractory materials and has a sudden expansion structure, the annular combustion stabilizing wall (12) is fixed in a bolt-on top plate mode and is horn-shaped as a whole, and the reactant primary nozzle (11) is positioned above the area where the annular combustion stabilizing wall (12) is positioned.
8. Supercritical water thermal combustion device suitable for high viscosity fuels according to claim 1 characterized by that the reactant primary nozzle (11) is a replaceable spiral nozzle and the fuel is crude oil, diesel oil, gasoline, coal slurry or ethanol.
9. The supercritical water heating combustion device suitable for high-viscosity fuel according to claim 1 or 7 is characterized in that various throttling and pressure controlling structures are involved inside the device: the fuel entering from the primary fuel inlet (1) and the oxidant entering from the primary oxidant inlet (6) are mixed and then pass through the annular combustion stabilizing wall (12) with the sudden expansion structure, and the whole reactant secondary nozzle (15) is in a Laval nozzle form; the outlet hole group (17) is closed, and the bottom of the combustion chamber (A2) is also in a closing structure.
10. Supercritical water heating combustion device suitable for high viscosity fuels according to claim 1 or 2 characterized by that the high energy heating rod (5) is made of corrosion resistant material and is fixed in the form of screw thread at the upper end cover (7) and extends to the upper part of the reactant first stage nozzle (11).
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| CN201911006820.0A CN110645555A (en) | 2019-10-22 | 2019-10-22 | Supercritical hydrothermal combustion device suitable for high-viscosity fuel |
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| CN201911006820.0A CN110645555A (en) | 2019-10-22 | 2019-10-22 | Supercritical hydrothermal combustion device suitable for high-viscosity fuel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113685158A (en) * | 2021-08-31 | 2021-11-23 | 西安交通大学 | Supercritical multi-element thermal fluid generating device capable of being directly used for thermal recovery of thick oil |
| CN113685159A (en) * | 2021-08-31 | 2021-11-23 | 西安交通大学 | Supercritical hydrothermal combustion type multi-element thermal fluid generating device and method with safety guarantee |
| CN113701148A (en) * | 2021-08-31 | 2021-11-26 | 武汉武锅能源工程有限公司 | Supercritical hydrothermal combustion type multi-element thermal fluid generating device |
| CN113739137A (en) * | 2021-08-31 | 2021-12-03 | 西安交通大学 | Supercritical hydrothermal combustion device capable of realizing temperature control and pressure control |
| CN113756766A (en) * | 2021-08-31 | 2021-12-07 | 西安交通大学 | Supercritical hydrothermal combustion type downhole multi-element thermal fluid generator with self-regulated product pressure |
| CN113756764A (en) * | 2021-08-31 | 2021-12-07 | 西安交通大学 | Self-adaptive control supercritical hydrothermal combustion type multi-element thermal fluid generation system |
| CN113756772A (en) * | 2021-08-31 | 2021-12-07 | 西安交通大学 | Supercritical hydrothermal combustion type multi-element thermal fluid generation system and process suitable for high-viscosity fuel |
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2019
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| CN114058401A (en) * | 2021-10-13 | 2022-02-18 | 成都科衡环保技术有限公司 | Supercritical oil well produced water direct oxidation oil displacement system and method |
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