CN114735801A - Supercritical water oxidation reactor - Google Patents
Supercritical water oxidation reactor Download PDFInfo
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- CN114735801A CN114735801A CN202210258975.9A CN202210258975A CN114735801A CN 114735801 A CN114735801 A CN 114735801A CN 202210258975 A CN202210258975 A CN 202210258975A CN 114735801 A CN114735801 A CN 114735801A
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- water oxidation
- oxidation reactor
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- 238000009284 supercritical water oxidation Methods 0.000 title claims abstract description 26
- 238000006243 chemical reaction Methods 0.000 claims abstract description 41
- 239000011229 interlayer Substances 0.000 claims abstract description 39
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 36
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 32
- 239000001301 oxygen Substances 0.000 claims description 32
- 229910052760 oxygen Inorganic materials 0.000 claims description 32
- 239000007789 gas Substances 0.000 claims description 20
- 229910052757 nitrogen Inorganic materials 0.000 claims description 18
- 239000010410 layer Substances 0.000 claims description 16
- 239000010865 sewage Substances 0.000 claims description 14
- 238000002485 combustion reaction Methods 0.000 claims description 11
- 239000002351 wastewater Substances 0.000 claims description 4
- 239000013078 crystal Substances 0.000 abstract description 11
- 229910017053 inorganic salt Inorganic materials 0.000 abstract description 10
- 239000000463 material Substances 0.000 abstract description 5
- 238000005192 partition Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 23
- 238000007254 oxidation reaction Methods 0.000 description 10
- 239000000126 substance Substances 0.000 description 9
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 8
- 239000000498 cooling water Substances 0.000 description 7
- 239000012530 fluid Substances 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 229910002092 carbon dioxide Inorganic materials 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- -1 halide ions Chemical class 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 230000036632 reaction speed Effects 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000005501 phase interface Effects 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000012429 reaction media Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- 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 relates to a supercritical water oxidation reactor, which comprises an outer cylinder, an inner cylinder and a feeding pipe, wherein a reaction cavity is arranged in the inner cylinder, the inner cylinder is sleeved in the outer cylinder, and the wall of the inner cylinder is a porous wall; a closed interlayer is arranged between the inner cylinder and the outer cylinder; the outer cylinder wall is provided with an air inlet communicated with the interlayer, and the air inlet is used for feeding air into the interlayer. The invention has the beneficial effects that the gas is introduced into the interlayer, so that the inner cylinder only needs to bear high temperature, and the outer cylinder only needs to bear high pressure, thus the selection range of the reactor material is wider. And the gas introduced into the interlayer has low heat conduction and specific heat, so that the gas does not need to be preheated any more, and the introduced gas forms a partition through the porous wall of the inner barrel and a subcritical region, so that the inorganic salt crystals can be basically prevented from being attached to the inner wall.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a supercritical water oxidation reactor.
Background
Supercritical Water Oxidation (SCWO) technology is a technology capable of realizing deep Oxidation treatment of various organic wastes. Supercritical water oxidation is to completely oxidize organic matters into clean substances such as H2O, CO2, N2 and the like through oxidation, S, P and the like are converted into salts with the highest valence for stabilization, and heavy metal oxidation stabilization solid phase exists in ash. The principle of the Supercritical Water Oxidation (SCWO) technology is that Supercritical Water is used as a reaction medium, and organic matters are rapidly converted into CO2, H2O, N2 and other harmless small molecules through a homogeneous Oxidation reaction.
Supercritical water oxidation has met with great success in treating various waste waters and excess sludges, with the disadvantages of harsh reaction conditions and high corrosivity to metals, as well as a long time required for the oxidation of certain chemically stable compounds. In order to increase the reaction speed, reduce the reaction time, and lower the reaction temperature, which makes the advantages of the supercritical water oxidation technology more obvious, many researchers are trying to introduce a catalyst into the supercritical water oxidation process.
Supercritical refers to a particular state of a fluid substance. When the temperature and pressure of the fluid in vapor-liquid equilibrium are raised, the density of the fluid is reduced due to thermal expansion, and the phase interface of the vapor phase and the liquid phase disappears due to the pressure rise, so that a homogeneous system is formed, and the critical point is formed. When the temperature and pressure of the fluid are higher than the critical temperature and critical pressure, respectively, the fluid is said to be in a supercritical state. Supercritical fluids have good flow properties like gases, but are much denser than gases, and therefore have many unique physicochemical properties.
The critical point of water is 374.3 ℃ and 22.064MPa, if the temperature and pressure of water are increased to above the critical point, namely supercritical water, the basic performances of density, viscosity, conductivity, dielectric constant and the like of the water are greatly different from those of common water, and the water shows the property similar to a non-polar organic compound. Therefore, supercritical water is completely miscible with non-polar substances (such as hydrocarbons) and other organic substances, while inorganic substances, especially salts, have low ionization constants and solubility in supercritical water. Meanwhile, supercritical water can be completely mutually soluble with gases such as air, oxygen, nitrogen, carbon dioxide and the like.
Since supercritical water is an excellent solvent for both organic matter and oxygen, oxidation of organic matter can be carried out in an oxygen-rich homogeneous phase, and the reaction is not limited by the need for phase transfer. Meanwhile, the reaction speed is accelerated by the high reaction temperature of 400-600 ℃, and the destruction rate can reach more than 99% within a few seconds of reaction time.
The supercritical water oxidation reaction is completely and thoroughly: organic carbon is converted to CO2, hydrogen is converted to H2O, halogen atoms are converted to halide ions, sulfur and phosphorus are converted to sulfate and phosphate, respectively, nitrogen is converted to nitrate and nitrite ions or nitrogen. And the supercritical water oxidation reaction is similar to a simple combustion process to a certain extent, and releases a large amount of heat in the oxidation process.
At present, supercritical water oxidation reaction is carried out in a special reactor, and due to the characteristics of supercritical water, the corresponding reactor needs to face the following problems:
1. the acids generated by the supercritical water oxidation process and the high temperatures and pressures required by itself can accelerate corrosion of the reactor inner walls.
2. Inorganic salts formed by oxidation reactions have extremely low solubility in supercritical water, resulting in precipitation of crystals that clog pipelines, aggravate corrosion, equipment structures, and the like.
3. The high temperature and high pressure state and strong corrosiveness in the reaction cavity make the selection requirement of the wall material in the reaction cavity strict.
In order to solve the problems, the prior art describes a sleeve type reactor, namely an inner cylinder and an outer cylinder are arranged, an interlayer is arranged between the two cylinders, the pressure in the interlayer is close to the pressure of a partial reaction cavity in the inner cylinder, and an oxidation reaction is carried out in the reaction cavity, so that the cylinder wall of the inner cylinder only needs to bear high temperature, and the cylinder wall of the outer cylinder only needs to bear high pressure, so that the selection range of preparation materials of the reactor is wider;
and on the basis, cooling water is also introduced into the reactor, for example, the cooling water is introduced into the interlayer, so that a subcritical region is formed on the inner wall of the inner cylinder due to temperature reduction, and the inorganic salt crystals are dissolved by the water in the subcritical region.
However, the above reactor has a problem that the liquid water in the subcritical region can only dissolve soluble crystals, insoluble substances still adhere to the inner wall, and although cooling water is introduced into the interlayer, the temperature of the cooling water is only lower than that in the reaction chamber, and the cooling water is still high-temperature water compared with normal temperature, so that the cooling water also needs heat exchange equipment to conduct heat generated by oxidation reaction out to preheat the cooling water, and meanwhile, the heat exchange equipment also needs to preheat sewage output from the inside of the reactor, so that the overall system is complex.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a supercritical water oxidation reactor, which comprises an outer cylinder, an inner cylinder and a feeding pipe, wherein a reaction cavity is arranged in the inner cylinder, the inner cylinder is sleeved in the outer cylinder, and the wall of the inner cylinder is a porous wall; a closed interlayer is arranged between the inner cylinder and the outer cylinder; and the outer cylinder wall is provided with an air inlet communicated with the interlayer, and the air inlet is used for feeding air into the interlayer.
Wherein the feeding pipe penetrates into the reaction chamber from the bottom of the reactor, and the top of the feeding pipe extends to the upper part of the reaction chamber; an outlet is arranged at the bottom of the reactor.
Wherein the feed tube comprises an inner tube and an outer tube that are coaxial; the inner pipe is arranged inside the outer pipe, and a conveying layer is arranged between the inner pipe and the outer pipe; the inner pipe and the conveying layer are respectively used for conveying combustion improver and waste water.
Wherein the gas is oxygen.
The interlayer is internally provided with an annular plate, the annular plate divides the interlayer into two sections, and the two sections of the interlayer are both provided with air inlets.
Wherein the gas is oxygen and nitrogen.
Wherein the feed tube comprises an inner tube and an outer tube that are coaxial; the inner pipe is arranged inside the outer pipe, and a conveying layer is arranged between the inner pipe and the outer pipe; the inner pipe is used for conveying combustion improver and oxygen, and the conveying layer is used for conveying sewage.
Wherein the gas is nitrogen.
Wherein, the top of the inner side of the reaction cavity is provided with a flow guide part.
Wherein, the water conservancy diversion spare is the back taper.
The invention has the beneficial effects that:
1. gas is introduced into the interlayer, so that the inner cylinder only needs to bear high temperature, and the outer cylinder only needs to bear high pressure, so that the selection range of the reactor material is wider.
2. The gas introduced into the interlayer has low heat conduction and specific heat, so that the gas does not need to be preheated any more, and the introduced gas forms a partition through the porous wall of the inner barrel and a subcritical region can basically prevent inorganic salt crystals from being attached to the inner wall.
3. The extension part which is positioned in the reaction cavity through the feeding pipe can preheat sewage through reaction heat, and heat exchange equipment is reduced.
4. Through the sectional arrangement of the interlayer, the subcritical area in the reaction cavity can be changed, and the non-stop internal cleaning is completed.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a cross-sectional view of a first embodiment of the present invention;
FIG. 2 is a cross-sectional view of a second embodiment of the present invention;
FIG. 3 is a cross-sectional view of a third embodiment of the present invention.
Description of the reference numerals
1. The device comprises an outer cylinder, 11, an outlet, 12, an air inlet, 2, an inner cylinder, 21, a sealing section, 3, an interlayer, 31, an annular plate, 4, a feeding pipe, 41, an inner pipe, 411, an oxygen pipe, 42, an outer pipe, 421, a water inlet pipe, 5, a reaction cavity, 51 and a flow guide piece.
Detailed Description
The technical solution in the embodiments of the present invention is clearly and completely described below with reference to the drawings in the embodiments of the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Example one
As shown in fig. 1, a supercritical water oxidation reactor provided for the embodiment includes an outer cylinder 1, an inner cylinder 2 and a feeding pipe 4, a reaction chamber 5 is provided inside the inner cylinder 2, the feeding pipe 4 feeds oxygen, sewage and combustion improver into the reaction chamber 5 for combustion, a closed interlayer 3 is provided between the inner cylinder 2 and the outer cylinder 1, a cooling material is introduced into the interlayer 3 to enable a subcritical region to be formed near the inner wall of the inner cylinder 2 to form a liquid water dissolved inorganic salt crystal, thereby preventing corrosion of a wall built-up, meanwhile, because the pressure difference between the inside of the interlayer 3 and the inside of the reaction chamber 5 is small, the inner cylinder 2 only needs to bear high temperature, and the outer cylinder 1 only needs to bear high pressure.
The invention is characterized in that the wall of the inner cylinder 2 is a porous wall, the porosity of the porous wall is 47.5 percent, and the aperture is 36 mu m;
the wall of the outer cylinder 1 is provided with an air inlet 12 communicated with the interlayer 3, and the air inlet 12 is used for feeding low-temperature or normal-temperature gas, such as nitrogen, into the interlayer 3.
A feeding pipe 4 penetrates into the reaction cavity 5 from the bottom of the reactor, and the top of the feeding pipe 4 extends to the upper part of the reaction cavity 5; the bottom of the reactor is provided with an outlet 11.
The feed pipe 4 comprises an inner pipe 41 and an outer pipe 42 which are coaxial;
the inner tube 41 is arranged inside the outer tube 42, and a conveying layer is arranged between the inner tube 41 and the outer tube 42;
the inner pipe 41 and the transport layer are used for transporting the oxidizer, oxygen and wastewater, respectively.
Specifically, as shown in fig. 1, the feeding pipe 4 has an outer section located outside the reactor, and the outer section is provided with an oxygen pipe 411 and a water inlet pipe 421, wherein the oxygen pipe 411 is communicated with the inner pipe 4, and the water inlet pipe 421 is communicated with the conveying layer.
And, a flow guide member 51 is provided at the top of the inner side of the reaction chamber 5. The flow guide 51 is of an inverted cone shape.
The working principle of the reactor is that the combustion improver and oxygen are conveyed into the reaction cavity 5 through the inner pipe 41 at the beginning stage, the sewage is conveyed into the reaction cavity 5 through the conveying layer so as to obtain the initial combustion heat, the flow guide piece 51 guides the gas-liquid mixture, and after impacting the top of the reaction cavity 5, a cyclone is generated to mix the substances and start to combust.
In the reaction process, nitrogen is taken as a cooling substance, is sent into the interlayer 3 and enters the reaction cavity 5 through the porous wall of the inner cylinder 2, and the sent nitrogen does not need to be heated any more due to the lower specific heat capacity and the lower heat conductivity coefficient of the gas, and meanwhile, a positive pressure subcritical region can be formed near the inner wall of the inner cylinder 2, so that the problem of inorganic salt crystallization wall hanging is reduced to a great extent;
meanwhile, oxygen and sewage are continuously sent into in the feeding pipe 4, because sewage is conveyed by the conveying layer, the sewage is preheated by the heat in the reaction chamber 5 in the process of moving in the feeding pipe 4, so not only does not need extra heat exchange equipment to lead out reaction heat and preheat sewage any more, but also the outer wall of the feeding pipe 4 can form a subcritical area, and further the adhesion of inorganic salt crystals is reduced, and the outer wall of the feeding pipe 4 positioned at the middle part can also guide the inorganic salt crystals precipitated in a supercritical water homogeneous phase, and the reason is that the positive pressure near the wall of the inner cylinder 2 and the cyclone formed by the mixed substances by the guide piece 51.
Example two
As shown in fig. 2, the present embodiment is different from the first embodiment in that,
the feed pipe 4 comprises an inner pipe 41 and an outer pipe 42 which are coaxial;
the inner tube 41 is arranged inside the outer tube 42, and a conveying layer is arranged between the inner tube 41 and the outer tube 42;
in the embodiment, oxygen is used to replace nitrogen in the interlayer 3, compared with the previous embodiment, the embodiment can omit a conveying device for oxygen, and oxygen is used to replace nitrogen to also play a role in forming a subcritical area of positive pressure on the inner wall of the inner cylinder 2.
EXAMPLE III
The embodiment is further improved on the basis of the second embodiment, specifically, as shown in fig. 3, an annular plate 31 is disposed in the interlayer 3, the annular plate 31 divides the interlayer 3 into two sections, i.e., sections a and b in fig. 3, and the two sections of the interlayer 3 are both provided with the air inlets 12.
Although the first embodiment and the second embodiment form the airflow partition and the subcritical region on the inner wall of the inner cylinder 2, most of inorganic salt crystals cannot be attached to the inner wall of the cylinder 2, but with the increase of the operation time, no matter whether the gas in the interlayer 3 is nitrogen or oxygen, the gas outlet of the gap on the wall of the inner cylinder 2 is blocked, therefore, in the present embodiment, the operation mode of the device is that oxygen is added into the two interlayers 3 at the initial stage, then the combustion improver and the sewage are introduced for combustion, during the operation process, the oxygen transportation into the section b is stopped to be converted into the nitrogen transportation, the pressure in the section b interlayer 3 is changed to be the same as the pressure in the reaction chamber 5, the section a still provides oxygen, and simultaneously the flow rate of the sewage is reduced, so that the whole section b region is converted into the subcritical region, and the inorganic salt crystals are dissolved on the side wall of the inner cylinder 2 at the section b through the condensed water, and then the interlayer of the section b is converted into oxygen (working pressure) from nitrogen, the section a is converted into nitrogen with the pressure close to that of the reaction cavity 5 from oxygen, so that the section a forms a pressure critical area, the position of the inner barrel 2 corresponding to the section a is dissolved by inorganic salt crystals, after the cleaning is finished, the interlayer of the section a is converted into oxygen (working pressure) from nitrogen, the flow of sewage is adjusted back, and normal operation is carried out.
In this embodiment, the gas switching manner of the sandwich layer at the section a and the section b may be optionally that each sandwich layer is provided with two gas inlets 12, and each gas inlet 12 is connected with nitrogen or oxygen equipment respectively, and the switching is performed when necessary.
Other embodiments
In other embodiments, the oxygen pipe 411 may be provided in both of the above-mentioned second and third embodiments, and the oxygen pipe 411 is optional, and in the second and third embodiments, the arrangement of the oxygen pipe 411 can be added to stabilize the oxygen concentration in the reaction chamber 5, or to serve as a way for supplementing oxygen when the wastewater treatment amount needs to be increased.
It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Claims (10)
1. A supercritical water oxidation reactor comprises an outer cylinder, an inner cylinder and a feeding pipe, wherein a reaction cavity is arranged in the inner cylinder;
a closed interlayer is arranged between the inner cylinder and the outer cylinder;
and the outer cylinder wall is provided with an air inlet communicated with the interlayer, and the air inlet is used for feeding air into the interlayer.
2. The supercritical water oxidation reactor of claim 1, wherein the feed pipe penetrates into the reaction chamber from the bottom of the reactor, and the top of the feed pipe extends to the upper part of the reaction chamber;
an outlet is arranged at the bottom of the reactor.
3. The supercritical water oxidation reactor of claim 2 wherein the feed pipe comprises coaxial inner and outer pipes;
the inner pipe is arranged inside the outer pipe, and a conveying layer is arranged between the inner pipe and the outer pipe;
the inner pipe and the conveying layer are respectively used for conveying combustion improver and waste water.
4. The supercritical water oxidation reactor according to claim 3, wherein the gas is oxygen.
5. The supercritical water oxidation reactor according to claim 3, wherein an annular plate is disposed within the interlayer, the annular plate divides the interlayer into two sections, and both of the two sections are provided with an air inlet.
6. The supercritical water oxidation reactor of claim 5 where the gas is oxygen and nitrogen.
7. The supercritical water oxidation reactor of claim 2 wherein the feed pipe comprises coaxial inner and outer pipes;
the inner pipe is arranged inside the outer pipe, and a conveying layer is arranged between the inner pipe and the outer pipe;
the inner pipe is used for conveying combustion improver and oxygen, and the conveying layer is used for conveying sewage.
8. The supercritical water oxidation reactor of claim 7 wherein the gas is nitrogen.
9. The supercritical water oxidation reactor according to any one of claims 1-8, wherein a flow guide is disposed at the top of the inner side of the reaction chamber.
10. The supercritical water oxidation reactor of claim 9 where the flow guide is an inverted cone.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116444022A (en) * | 2023-05-10 | 2023-07-18 | 广东红海湾发电有限公司 | Supercritical water oxidation treatment system for high-salt-content and high-chlorine-content organic wastewater |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116444022A (en) * | 2023-05-10 | 2023-07-18 | 广东红海湾发电有限公司 | Supercritical water oxidation treatment system for high-salt-content and high-chlorine-content organic wastewater |
| CN116444022B (en) * | 2023-05-10 | 2023-12-08 | 广东红海湾发电有限公司 | Supercritical water oxidation treatment system for high-salt-content and high-chlorine-content organic wastewater |
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