CN113739137B - Supercritical hydrothermal combustion device capable of realizing temperature control and pressure control - Google Patents
Supercritical hydrothermal combustion device capable of realizing temperature control and pressure control Download PDFInfo
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- CN113739137B CN113739137B CN202111011916.3A CN202111011916A CN113739137B CN 113739137 B CN113739137 B CN 113739137B CN 202111011916 A CN202111011916 A CN 202111011916A CN 113739137 B CN113739137 B CN 113739137B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
- F23D11/10—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour
- F23D11/22—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour the gaseous medium being vaporised fuel, e.g. for a soldering lamp, or other gaseous fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
- F23D11/36—Details, e.g. burner cooling means, noise reduction means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
- F23D11/36—Details, e.g. burner cooling means, noise reduction means
- F23D11/38—Nozzles; Cleaning devices therefor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/54—Improvements relating to the production of bulk chemicals using solvents, e.g. supercritical solvents or ionic liquids
Abstract
The invention discloses a supercritical water heat combustion device capable of realizing temperature and pressure control, which comprises four parts, namely a generator end cover, a mixing cylinder, a reactor wall and a spiral cooling cylinder. The bottom of the end cover of the reactor is provided with a nozzle platform, the nozzle platform is provided with an oxidant spiral nozzle, and the nozzle platform is in threaded connection with an atomizing nozzle to ensure that fuel and oxidant are uniformly mixed. The connecting cylinder is internally provided with a heat preservation groove to ensure that the fuel is heated to a set temperature by the heating rod. The water in the cooling spiral channel flows downwards to cool the combustion chamber, then enters the mixing spiral channel to be mixed with the reaction fluid flowing out from the outlet hole group of the mixing cylinder body, and the temperature control target is achieved. The middle necking structure of the combustion chamber, the bottom necking structure of the combustion chamber, the mixing cylinder outlet hole group and the like can achieve the purpose of pressure control.
Description
Technical Field
The invention belongs to the technical field of supercritical water oxidation, and particularly relates to a supercritical water heat combustion device capable of realizing temperature and pressure control.
Background
Supercritical water is one in which both the temperature and pressure are above its critical point (T c ＝374.15℃，p c =22.12 MPa) water in a special state. When the temperature and pressure of water exceed their critical points, the physical and chemical properties of water, such as density, viscosity, dielectric constant, ionic product, etc., will change dramatically. Wherein, the density is similar to that of the liquid and is 100 to 1000 times larger than that of the corresponding normal pressure gas; the viscosity is close to that of gas and is about 1 to 10 percent of that of corresponding liquid; the diffusion coefficient is between that of gas and liquid, and is 10-100 times of that of common liquid. In addition, the viscosity of the supercritical water is obviously lower than that of the conventional water, so that the diffusion coefficient is improved, the mass transfer performance is improved, the supercritical water can be completely mixed with nonpolar gas, hydrocarbon and the like to form a mixtureHomogeneous systems. However, the dissociation constant and solubility of inorganic salts in supercritical water are low.
Supercritical Water Oxidation (SCWO) was proposed by american scholars model in the last 80 th century. The technology makes organic substances completely dissolved in the supercritical water react with an oxidant rapidly and thoroughly by virtue of the unique properties of the supercritical water. Wherein, carbon element in the organic matter is converted into carbon dioxide, elements such as chlorine, sulfur, phosphorus and the like are converted into corresponding inorganic salt, and most of nitrogen element is converted into nitrogen gas, thereby realizing the high-efficiency harmless treatment of the organic waste. The supercritical water oxidation technology has wide application range, can treat various industrial organic wastewater and wastes, municipal sewage, excessive activated sludge of sewage treatment plants, human metabolic sewage and the like, and has good environmental protection benefit, social benefit and economic benefit.
However, even though supercritical water oxidation technology has many advantages, the severe reaction conditions of SCWO, which result in strong corrosivity, high material requirements, and problems of corrosion and salt deposition during operation, are the biggest obstacles to the commercialization of SCWO at present. The specific table has the following components:
(1) Supercritical water oxidation reaction conditions are harsh, and the reaction needs to be carried out in a high-temperature and high-pressure environment. For a conventional tubular reactor, the wall of the reactor needs to withstand a high temperature of 600-700 ℃ and a high pressure of 25 MPa, which must be achieved by using a high temperature resistant material such as Ni alloy and by increasing the wall thickness, which results in an increase in the construction cost of the reactor.
(2) The preheating device has large energy demand and the reaction system has low economy. Although the SCWO process is an exothermic reaction, auto-heating can be achieved when the mass fraction of organics reaches 2-3%, an external heat source is still required to preheat the reactants and oxidant during operation of the plant. At present, most of heating modes of supercritical water oxidation equipment at home and abroad adopt an electric heating mode, and high-temperature and high-pressure external preheating equipment has huge investment cost, thereby causing huge barriers to large-scale industrial application of SCWO technology.
(3) And the corrosion of materials. In a supercritical water environment, the corrosion rate of the corrosion-resistant material is accelerated by high temperature, high pressure, dissolved oxygen and some free radicals and ions generated in the reaction. In addition, heteroatoms such as halogens, sulfur, phosphorus, and the like contained in the organic substance generate corresponding acids during the reaction process, which further causes corrosion of equipment.
(4) The problem of salt deposition. At normal temperature, most inorganic salts can be dissolved in water. However, in a high-temperature and high-pressure environment, the solubility of most inorganic salts is extremely low with drastic changes in the physicochemical properties of water. When the solution is heated from the subcritical temperature to the supercritical temperature, a large amount of inorganic salts originally dissolved in water can be separated out, so that the blockage of the preheater and the inlet and outlet pipelines of the reactor is caused, the normal operation of the reactor is influenced, and even great potential safety hazards exist.
(5) The treatment of reaction products. The temperature and pressure of the traditional supercritical water oxidation reaction product are too high, and the sampling or treatment cannot be directly carried out. The temperature reduction treatment is carried out through a heat exchanger, and the pressure reduction treatment is carried out through a back pressure valve and other devices. Increasing the running cost and the occupied area of the device.
Disclosure of Invention
In order to overcome the disadvantages of the prior art and to solve at least one of the above technical problems, the present invention provides a supercritical water heating combustion apparatus capable of controlling temperature and pressure, which uses a heating rod to heat a fuel, and eliminates a preheating device outside the reactor for the fuel. The heat preservation is carried out by utilizing the heat preservation groove, and the heating efficiency is ensured. Before the ignition operation of the reactor, the temperature of the cooling water is adjusted to ensure that the cooling water has higher temperature so as to maintain the high-temperature environment in the combustion chamber, ensure the smooth ignition in the reactor and realize stable combustion. In addition, it utilizes spiral cooling barrel to cool off the reactor main part, has avoided the exothermic high temperature corrosion problem that leads to of reaction, and the place of cold water and supercritical water contact can the reduce temperature, dissolves inorganic salt again, reaches the purpose that prevents the salt deposit. The mixing cooling water and the pressure control structures such as the necking and the outlet reduce the temperature and the pressure of the mixing chamber, and the product is convenient to collect and treat. In addition, the combustion device also has the characteristics of convenience in disassembly and assembly, easiness in loading and replacing the catalyst, easiness in overhauling and maintaining and the like.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a supercritical water heat combustion device that can realize accuse temperature accuse pressure, includes reactor end cover and reactor wall, embedded installation spiral cooling barrel and mixing barrel in proper order on reactor wall upper portion, spiral cooling barrel outer wall sets up cooling spiral passage, and reactor end cover adaptation is installed on the top of mixing barrel, has fuel entry and oxidant entry with mixing barrel intercommunication on the reactor end cover, and open the bottom of mixing barrel has the lower part intercommunication of export hole crowd and reactor wall, and cooling spiral passage's delivery port and the lower part intercommunication of reactor wall form the combustion chamber in mixing barrel from this, form the mixing chamber in the lower part of reactor wall.
In one embodiment, an axial connecting cylinder body is arranged in the reactor end cover, a heating rod is arranged in the connecting cylinder body, a first annular cylindrical gap is arranged between the inner wall of the connecting cylinder body and the heating rod, a second annular cylindrical gap is arranged between the outer wall of the connecting cylinder body and the reactor end cover, and the fuel inlet and the oxidant inlet are respectively communicated with the blending cylinder body through the first annular gap and the second annular gap.
In one embodiment, a nozzle platform is arranged at the bottom end of the reactor end cover, the bottom end of the connecting cylinder is connected to the top end of the nozzle platform, the nozzle platform is in threaded connection with the fuel atomizing nozzle and is provided with an oxidant spiral nozzle, an inlet end of the fuel atomizing nozzle and an inlet end of the oxidant spiral nozzle are respectively communicated with the first gap and the second gap, and outlets are located at the top end of the combustion chamber.
In one embodiment, a heat preservation groove is arranged in the connecting cylinder, and a heat insulation ceramic pipe is arranged in the heat preservation groove to serve as a heat preservation device.
In one embodiment, the lower part of the outer wall of the blending cylinder is provided with a blending spiral channel, the outlet end of the cooling spiral channel is communicated with the blending spiral channel, and the outlet of the blending spiral channel is positioned at the upper part of the blending chamber.
The inner space of the mixing cylinder body consists of an upper cylindrical space and a lower cylindrical space, wherein the cross-sectional area of the upper cylindrical space is larger than that of the lower cylindrical space, and a necking structure is formed at the junction of the two spaces.
The upper portion of the inner wall of the mixing cylinder is provided with a combustion chamber cylinder, the inner space of the combustion chamber cylinder is the upper cylindrical space, the bottom end of the lower cylindrical space is conical to form a closing structure, and the outlet holes are distributed on the conical surface in a group mode.
In one embodiment, the fuel includes, but is not limited to, crude oil, diesel, gasoline, coal slurry, ethanol, and combinations thereof; the oxidant includes, but is not limited to, oxygen, hydrogen peroxide, and combinations thereof.
Compared with the prior art, the invention has the beneficial effects that:
1. the method aims at the problems that the energy requirement of the current supercritical water oxidation reaction preheating device is large and the economical efficiency of a reaction system is not high. According to the invention, the heating rod is arranged at the top end of the reactor, and after fuel enters from the fuel inlet, the heating rod heats the fuel in the straight hole, so that preheating equipment for the fuel outside the reactor is omitted, heat loss in the process of entering the reactor after preheating is avoided, and the temperature of the fuel is ensured. After entering the combustion chamber through the atomizing nozzle, the fuel is uniformly mixed with the oxidant for hydrothermal combustion, and the mixture is used as an internal heat source of the reactor, so that low-temperature incidence of the fuel can be realized, the energy consumption is greatly reduced, and the problems of corrosion and salt deposition of the fuel in the preheater are fundamentally solved.
2. The combustion device adopts supercritical water heat combustion, is matched with strengthening measures such as an atomizing nozzle, a spiral nozzle and the like, can realize high-efficiency degradation of organic matters under short retention time at the reaction temperature of 600 to 1100 ℃, and further reduces the volume of the reactor.
3. The temperature of the fluid inside the supercritical water reactor is much higher than that of a conventional SCWO reactor, and therefore cooling protection is required to the walls. The device is innovatively provided with the spiral cooling cylinder, cooling water flows downwards in the cooling spiral channel formed between the cooling water and the wall of the reactor to cool the combustion chamber, high-temperature fluid in the reactor is guaranteed not to be directly contacted with the external pressure-bearing wall, the material selection requirement of the external pressure-bearing wall is effectively reduced, and the processing cost is further reduced. In addition, cooling water enters the mixing spiral channel, is mixed with the reaction fluid flowing out from the mixing cylinder outlet hole group in the mixing chamber, and achieves the effects of temperature control and pressure control by means of a pressure control structure such as a necking, an outlet and the like.
4. The heat preservation groove is innovatively arranged in the connecting cylinder body, heat preservation of the preheating fuel in the connecting cylinder body is achieved, the heating effect of the heating rod is guaranteed, and stable ignition of the device is achieved.
Drawings
FIG. 1 is a schematic diagram of the present invention.
FIG. 2 is a schematic diagram of the structure of the end cap of the reactor of the present invention.
FIG. 3 is a schematic view of the structure of the components disposed in the end cap of the reactor of the present invention.
Wherein: 1. a reactor end cap; 2. a large bolt group; 3. mixing a cylinder body; 4. the reactor wall; 5. a combustion chamber barrel; 6. spirally cooling the cylinder; 7. a heating rod; 8. a fuel inlet; 9. connecting the cylinder body; 10. a heat preservation groove; 11. an oxidant inlet; 12. a nozzle platform; 13. an atomizing nozzle; 14. an oxidant spiral nozzle; 15. a wall surface cooling water inlet; 16. cooling the spiral channel; 17. a blending spiral channel; 18. mixing a cylinder outlet hole group; 19. a bottom outlet; a1, a combustion chamber; A2. a blending chamber.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "one side", "one end", "one side", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
As shown in fig. 1, 2 and 3: a supercritical water heat combustion device capable of realizing temperature and pressure control mainly comprises a reactor end cover 1, a reactor wall 4, a spiral cooling cylinder 6 and a mixing cylinder 3.
Wherein, the blending cylinder 3 and the spiral cooling cylinder 6 are arranged on the upper part of the reactor wall 4 from inside to outside, the inner wall of the spiral cooling cylinder 6 is clung to the outer wall of the blending cylinder 3, and a cooling spiral channel 16 is arranged between the outer wall and the reactor wall 4. The reactor end cover 1 is adapted to be mounted on the top end of the blending cylinder 3, the fuel inlet 8 and the oxidant inlet 11 are both communicated with the blending cylinder 3 and are combusted therein, the bottom end of the blending cylinder 3 is provided with an outlet hole group 18 and is communicated with the lower part of the reactor wall 4 through the outlet hole group 18, and the water outlet of the cooling spiral channel 16 is communicated with the lower part of the reactor wall 4, so that a combustion chamber A1 is formed in the blending cylinder 3, and a blending chamber A2 is formed in the lower part of the reactor wall 4.
In one embodiment, the reactor end cover 1 is an important part, and the fuel inlet 8 and the oxidant inlet 11 are provided thereon and respectively and independently communicated with the combustion chamber A1, and mixed and combusted in the combustion chamber A1.
In one embodiment, an axial connecting cylinder 9 is arranged in the reactor end cover 1, the heating rod 7 is arranged in the connecting cylinder 9, a first annular gap is arranged between the inner wall of the connecting cylinder 9 and the heating rod 7, a second annular gap is arranged between the outer wall of the connecting cylinder 9 and the reactor end cover 1, and the fuel inlet 8 and the oxidant inlet 11 are respectively communicated with the blending cylinder 3 through the first annular gap and the second annular gap.
In one embodiment, a nozzle platform 12 is disposed at the bottom end of the reactor end cover 1, and an oxidant spiral nozzle 14 is opened on the nozzle platform 12 and is screwed with the fuel atomizing nozzle 13. Wherein the inlet end of the fuel atomizing nozzle 13 and the inlet end of the oxidant spiral nozzle 14 are respectively communicated with the fuel inlet 8 and the oxidant inlet 11, and the outlets are positioned at the top end of the combustion chamber A1.
In one embodiment, the upper portion of the nozzle platform 12 may form an annular oxidant buffer space around the connecting cylinder 9.
As a result, the fuel enters from the fuel inlet 8, and is heated in the connecting cylinder 9 by the heating rod 7, and the heated fuel is injected into the combustion chamber A1 through the fuel atomizing nozzle 13; the oxidant enters the oxidant buffer space from the oxidant inlet 11 and enters the combustion chamber A1 through the oxidant spiral ports 14 where uniform mixing with the fuel is achieved.
In one embodiment, the heating rod 7, the fuel inlet 8, the connecting cylinder 9, the oxidant inlet 11 are coaxially arranged and connected by a screw thread. Illustratively, the connecting cylinder 9 is positioned at the upper part of the reactor end cover 1 and penetrates through the reactor end cover 1, the bottom of the connecting cylinder is connected with the nozzle platform 12 through threads, and the connecting cylinder is internally provided with a heat preservation groove 10 for preserving heat of fuel.
In one embodiment, a combustion chamber cylinder 5 may be installed at the upper part inside the blending cylinder 3, and the combustion chamber A1 is assembled by the reactor end cover 1, the blending cylinder 3 and the combustion chamber cylinder 5, wherein the large bolt group 2 penetrates through the reactor end cover 1 and enters the blending cylinder 3 to fixedly connect the two. The combustion chamber cylinder 5 is fixed by the upper compression of the reactor end cover 1 and the outer compression of the mixing cylinder 3.
In one embodiment, the inner space of the blending cylinder 3 is composed of an upper cylindrical space and a lower cylindrical space, wherein the cross-sectional area of the upper cylindrical space is larger than that of the lower cylindrical space, so that a necking structure is formed at the junction of the two spaces. Illustratively, the inner space of the combustor basket 5 is the upper cylindrical space.
In one embodiment, the bottom end of the lower cylindrical space is tapered to form a closed structure, and the outlet hole group 18 is composed of a plurality of outlet holes uniformly distributed on the tapered surface.
In the present invention, a mixing chamber A2 is obtained by combining a mixing cylinder 3 and a reactor wall 4.
In one embodiment, the blending cylinder 3 is threadedly connected to an external spiral cooling cylinder 6, and the spiral cooling cylinder 6 is externally connected to the reactor wall 4. The reactor body is cooled by an external spiral cooling cylinder 6, and cooling water flows downwards in a cooling spiral channel 16 formed between the spiral cooling cylinder 6 and the reactor wall 4 after entering through a reactor wall surface cooling water inlet 15 to cool the combustion chamber A1. In addition, in order to ensure smooth ignition and realize stable combustion, the temperature of cooling water is adjustable, and the temperature of the cooling water is high during ignition operation, so that a high-temperature environment in the combustion chamber A1 is maintained.
In one embodiment, the lower part of the outer wall of the blending cylinder 3 is provided with a blending spiral passage 17, the outlet end of the cooling spiral passage 16 is communicated with the blending spiral passage 17, and the outlet of the blending spiral passage 17 is positioned at the upper part of the blending chamber A2.
In one embodiment, the hydrothermal combustion device of the present invention involves various pressure control structures inside: the middle part of the combustion chamber A1 is provided with a necking structure, the bottom of the combustion chamber A1 is provided with the necking structure, the reacted fluid flows out through the mixing cylinder outlet hole group 18, then the temperature and pressure of the reacted fluid and the cooling water flowing out from the mixing spiral channel 17 are adjusted in the mixing chamber A2, and the bottom outlet 19 is provided with the necking structure.
According to the structure, the process flow of the invention is as follows:
before the reaction starts, cooling water having a relatively high temperature is introduced through the wall surface cooling water inlet 15 to maintain a high temperature environment in the combustion chamber A1. When the reaction begins, fuel of certain concentration gets into the reactor through fuel entry 8 under the supercritical pressure, heat it in the straight hole through heating rod 7, fuel after the heating jets into combustion chamber A1 through the atomizing nozzle 13 that sets up on nozzle platform 12, oxidant gets into the annular space between nozzle platform 12 and the reactor end cover 1 through oxidant entry 11 under the supercritical pressure in, get into combustion chamber A1 through the oxidant spiral spout 14 of seting up on nozzle platform 12, it is even with the fuel mixture, produce supercritical hydrothermal flame afterwards.
After the hydrothermal flame is stabilized, cooling water enters through a wall surface cooling water inlet 15, flows downwards in a cooling spiral channel 16 formed between the spiral cooling cylinder 6 and the reactor wall 4 to cool the combustion chamber, then enters a blending spiral channel 17, is mixed with reaction fluid flowing out through a blending cylinder outlet hole group 18 in a blending chamber A2 to realize temperature and pressure adjustment, and finally flows out through a bottom outlet 19.
In conclusion, the invention discloses a supercritical hydrothermal combustion device capable of realizing temperature and pressure control, which mainly comprises four main components, namely a reactor end cover, a mixing cylinder, a reactor wall, a spiral cooling cylinder and the like. The upper part of the reactor end cover is provided with a fuel inlet, an oxidant inlet, a heating rod and a connecting cylinder, the bottom of the reactor end cover is provided with a nozzle platform, and the nozzle platform is provided with an oxidant spiral nozzle and is in threaded connection with an atomizing nozzle. The device comprises a combustion chamber and a mixing chamber inside. The combustion chamber is formed by matching a reactor end cover, a mixing cylinder body and a combustion chamber cylinder body, wherein the reactor end cover and the mixing cylinder body are connected through a large-scale bolt group, and the combustion chamber cylinder body is fixed through the pressing of the reactor end cover and the mixing cylinder body. The blending chamber is formed by matching a blending cylinder body and the wall of the reactor, a spiral cooling cylinder body is connected outside the blending cylinder body through threads, and the wall of the reactor is connected outside the spiral cooling cylinder body. The device is internally provided with various necking and necking pressure control structures, so that the purpose of external pressure control can be achieved. The device also realizes that the fuel is heated in the reactor through the heating rod, and the cooling water cools the combustion chamber through the cooling spiral channel, thereby effectively slowing down the corrosion of the inner wall surface of the reactor, effectively maintaining the temperature of the reactor and achieving the purpose of external temperature control.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical solution according to the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (3)
1. A supercritical water heat combustion device capable of realizing temperature and pressure control comprises a reactor end cover (1) and a reactor wall (4), and is characterized in that a spiral cooling cylinder (6) and a blending cylinder (3) are sequentially embedded and installed at the upper part of the reactor wall (4), a cooling spiral channel (16) is arranged on the outer wall of the spiral cooling cylinder (6), the reactor end cover (1) is installed at the top end of the blending cylinder (3) in a matching manner, a fuel inlet (8) and an oxidant inlet (11) which are communicated with the blending cylinder (3) are arranged on the reactor end cover (1), an outlet hole group (18) is arranged at the bottom end of the blending cylinder (3) and communicated with the lower part of the reactor wall (4), a water outlet of the cooling spiral channel (16) is communicated with the lower part of the reactor wall (4), so that a combustion chamber (A1) is formed in the blending cylinder (3), and a blending chamber (A2) is formed at the lower part of the reactor wall (4);
an axial connecting cylinder body (9) is arranged in the reactor end cover (1), a heating rod (7) is arranged in the connecting cylinder body (9), a first annular cylindrical gap is formed between the inner wall of the connecting cylinder body (9) and the heating rod (7), a second annular cylindrical gap is formed between the outer wall of the connecting cylinder body (9) and the reactor end cover (1), and the fuel inlet (8) and the oxidant inlet (11) are respectively communicated with the mixing cylinder body (3) through the first gap and the second gap;
the bottom end of the reactor end cover (1) is provided with a nozzle platform (12), the bottom end of the connecting cylinder body (9) is connected to the top end of the nozzle platform (12), the nozzle platform (12) is in threaded connection with a fuel atomizing nozzle (13) and is provided with an oxidant spiral nozzle (14), the inlet end of the fuel atomizing nozzle (13) and the inlet end of the oxidant spiral nozzle (14) are respectively communicated with the first gap and the second gap, and outlets are located at the top end of the combustion chamber (A1);
the heat-insulation ceramic pipe type mixing device is characterized in that a heat-insulation groove (10) is formed in the connecting cylinder body (9), a heat-insulation ceramic pipe is arranged in the heat-insulation groove (10) to serve as a heat-insulation device, a mixing spiral channel (17) is arranged on the lower portion of the outer wall of the mixing cylinder body (3), the outlet end of a cooling spiral channel (16) is communicated with the mixing spiral channel (17), the outlet of the mixing spiral channel (17) is located in the upper portion of a mixing chamber (A2), the inner space of the mixing cylinder body (3) is composed of an upper cylindrical space and a lower cylindrical space, the cross-sectional area of the upper cylindrical space is larger than that of the lower cylindrical space, and a necking structure is formed at the junction of the two spaces.
2. The supercritical water heating combustion device capable of controlling temperature and pressure according to claim 1 is characterized in that a combustion chamber cylinder (5) is arranged on the upper portion of the inner wall of the mixing cylinder (3), the inner space of the combustion chamber cylinder (5) is the upper cylindrical space, the bottom end of the lower cylindrical space is conical to form a closing structure, and the outlet hole group (18) is distributed on the conical surface.
3. The supercritical water heating combustion device capable of realizing temperature and pressure control according to claim 1, wherein the fuel is one or more of crude oil, diesel oil, gasoline, coal slurry and ethanol; the oxidant is oxygen or hydrogen peroxide.
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| CN110642363B (en) * | 2019-10-22 | 2024-04-09 | 西安交通大学 | Multifunctional supercritical water reactor for grading and strengthening degradation of organic pollutants |
| CN110644962A (en) * | 2019-10-22 | 2020-01-03 | 西安交通大学 | Supercritical hydrothermal combustion type underground steam generator for heavy oil thermal recovery |
| CN110645555A (en) * | 2019-10-22 | 2020-01-03 | 西安交通大学 | Supercritical hydrothermal combustion device suitable for high-viscosity fuel |
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