CN109851029B - Supercritical water oxidation system - Google Patents
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- CN109851029B CN109851029B CN201910108862.9A CN201910108862A CN109851029B CN 109851029 B CN109851029 B CN 109851029B CN 201910108862 A CN201910108862 A CN 201910108862A CN 109851029 B CN109851029 B CN 109851029B
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Abstract
The present disclosure provides a supercritical water oxidation system. The system comprises a reactor, a protection device, an oxidant supply device and an organic matter supply device. The reactor comprises a reactor shell, wherein an oxidant feeding hole, an organic matter feeding hole and a discharging hole are formed in the reactor shell, and the reactor releases reaction products through the discharging hole. The protection device comprises an outer protection layer, a cooling layer and an inner protection layer, wherein a first space and a second space are formed by the inner protection layer and the outer protection layer in a surrounding mode. The cooling layer includes a liquid line capable of storing liquid, the liquid line being disposed in the first space. The reactor is arranged in the second space, and the discharge port of the reactor extends to the region except the region where the liquid pipeline is located in the first space, so that the reaction product discharged from the discharge port can be cooled through the liquid stored in the liquid pipeline. The oxidant feeding device is communicated with the oxidant feeding hole, and the organic matter feeding device is communicated with the organic matter feeding hole.
Description
Technical Field
The present disclosure relates to the field of atomic energy, and more particularly, to a supercritical water oxidation system.
Background
With the development of the atomic energy industry and the increasing use of radioactive isotopes, the amount of radioactive waste is increasing. If the waste water is discharged without treatment or improper treatment, the environment is subjected to radioactive pollution. Not only affects the growth of animals and plants and worsens water body, but also is harmful to human health and even has adverse effect on offspring.
In the course of implementing the disclosed concept, the inventors found that there are at least the following problems in the prior art: although the supercritical water oxidation decomposition technology is a hot spot of the current organic waste treatment research, the supercritical water oxidation technology of the radioactive organic substances mainly has the following problems: the supercritical water equipment system does not form an all-in-one machine, supercritical water oxidation, effluent purification, protective equipment and the like are completed by different equipment, and system integration is insufficient, so that the supercritical water equipment is not popularized and applied in the form of industrial products. Moreover, the reaction temperature of the common supercritical water technology is generally lower, generally 500-600 ℃, lower than the minimum temperature (about 700 ℃) required by the complete pyrolysis and gasification of organic matters, and the complete mineralization of refractory organic matters (such as amines and the like) cannot be achieved, so that the advantage of supercritical water oxidation is not exerted.
Disclosure of Invention
In view of this, the present disclosure provides a supercritical water oxidation system capable of performing integrated purification and separation on radioactive materials.
The embodiment of the disclosure provides a supercritical water oxidation system. The system comprises a reactor, a protection device, an oxidant supply device and an organic matter supply device. The reactor comprises a reactor shell, wherein an oxidant feeding hole, an organic matter feeding hole and a discharging hole are formed in the reactor shell, and a reaction product is discharged from the discharging hole. The protective device comprises an outer protective layer, a cooling layer and an inner protective layer. The cooling layer comprises a liquid pipeline capable of storing liquid, and the liquid pipeline is arranged in the first space; the reactor is arranged in the second space, and the discharge port of the reactor extends to the region except the region where the liquid pipeline is located in the first space, so that the reaction product discharged from the discharge port can be cooled through the liquid stored in the liquid pipeline. The oxidant feeding device is communicated with the oxidant feeding hole, and the organic matter feeding device is communicated with the organic matter feeding hole.
According to an embodiment of the present disclosure, the outer protection layer includes an outer sleeve and a pair of side wall end plates disposed opposite to each other, and the inner protection layer includes a coaxial first cylinder and a pair of second cylinders disposed opposite to each other, and the first cylinder is disposed between the pair of second cylinders and coaxial with the pair of second cylinders. The first cylinder comprises a first cylinder side wall, and the first cylinder is of a structure with two open ends. Each second cylinder in a pair of second cylinders comprises a first end plate and a second cylinder side wall, the first end plate is of an annular plate structure, the size of the inner ring of the first end plate is matched with that of the first cylinder, and the pair of second cylinders are fixedly connected with the first cylinder through the first end plate. The first space is enclosed by the first cylinder side wall, the first end plate and the outer sleeve, and the second space is enclosed by the first cylinder, the second cylinder and the pair of side wall end plates. The liquid pipeline comprises a plurality of double-layer sleeves which extend along the connecting line direction of the pair of side wall end plates, the double-layer sleeves are periodically arranged in the radial direction of the outer sleeve and the circumferential direction of the outer sleeve, and each double-layer sleeve comprises an outer-layer sleeve and an inner-layer sleeve. Wherein, be provided with a plurality of first interfaces on the first end plate for communicate with a plurality of double-deck sheathed tube outer sleeve pipes respectively.
According to an embodiment of the present disclosure, the second side wall of each of the pair of second cylinders has a first opening, one of the first openings serves as a first liquid inlet, and the other one of the first openings serves as a first liquid outlet. The guard is configured to: when the reactor arranged in the second space is in a working state, liquid is circularly led in from the first liquid inlet and led out from the first liquid outlet after flowing through the outer sleeves of the double-layer sleeves so as to cool the reaction product discharged from the discharge hole.
According to an embodiment of the present disclosure, each of the pair of second cylinders further includes a second end plate opposite to the first end plate, and a boundary plate disposed between the first end plate and the second end plate. The first opening is disposed on the sidewall between the first end plate and the interface plate. The interface board is provided with a plurality of second interfaces which are respectively communicated with the inner layer sleeves of the double-layer sleeves. The length of the inner sleeve is larger than that of the outer sleeve, and the second end plate is provided with a plurality of communicating holes for communicating the inner sleeve with the second space. The second end plate and the boundary plate are of the same annular plate structure as the first end plate.
According to an embodiment of the present disclosure, the cooling layer further comprises a plurality of gas lines and a condensate collection pan. The condensate collecting disc is arranged between two adjacent groups of double-layer sleeves which are periodically arranged in the first space along the radial direction of the outer sleeve, the first disc face of the condensate collecting disc close to the discharge port is of a closed structure, and the second disc face of the condensate collecting disc far away from the discharge port is of an open structure. The condensate collecting plate has a plurality of grooves periodically arranged in an axial direction of the outer sleeve, and the plurality of grooves extend in a direction perpendicular to a line connecting the first plate surface and the second plate surface. A plurality of gas pipelines extend along the direction of connecting the first disk surface and the second disk surface and are arranged at a plurality of grooves, the first ends of the plurality of gas pipelines close to the first disk surface are of an open structure, the second ends close to the second disk surface are of a closed structure, the second ends of the plurality of gas pipelines are higher than the second disk surface, and the plurality of gas pipelines are provided with a plurality of gas nozzles on the side wall higher than the second disk surface. The outer protective layer is provided with a slag discharge port, a liquid discharge port and an exhaust port, the slag discharge port, the liquid discharge port and the exhaust port are respectively used for discharging residues in reaction products and condensate and waste gas obtained by cooling the reaction products, and the liquid discharge port is communicated with the condensate collecting disc.
According to an embodiment of the present disclosure, the reactor shell includes a first end wall, a shell side wall, and a second end wall disposed opposite the first end wall. The oxidant feed inlet is arranged on the first end wall, the discharge outlet is arranged on the second end wall, and the organic matter feed inlet is arranged on the side wall of the shell close to the second end wall. The reactor also comprises a plurality of organic matter conveying pipes and end circular pipes. The organic matter conveying pipes extend along the connecting line direction of the first end wall and the second end wall and are arranged in the reactor shell. Above-mentioned many organic matter conveyer pipes include first end and the second end relative with first end, the first end and the organic matter feed inlet intercommunication of organic matter conveyer pipe. The end part ring pipe is arranged in the area which is close to the first end wall in the reactor shell, and the end part ring pipe is communicated with the second ends of the organic matter conveying pipes. The end ring pipe is provided with a plurality of first discharge holes on the side wall close to the second end wall, and/or the organic matter conveying pipes are provided with a plurality of second discharge holes on the side wall close to the central shaft of the reactor and close to the first end wall.
According to an embodiment of the present disclosure, the reactor further includes a third cylinder and a feed plate. The third cylinder is sleeved outside the organic matter conveying pipes and the end part ring pipes and comprises a third end plate and a third cylinder side wall. The third end plate has a first feed aperture corresponding to the oxidant feed aperture. The feeding plate is arranged between the third end plate and the end ring pipe so as to form an oxidant transmission channel between the feeding plate and the third cylinder body, and the feeding plate is provided with a plurality of second feeding holes.
According to the embodiment of the present disclosure, a second liquid inlet and a second liquid outlet are further disposed on the side wall of the housing. The reactor also comprises a lining and a circulation sleeve, wherein the lining is arranged between the side wall of the shell and the side wall of the third cylinder, and the circulation sleeve is spirally wound between the lining and the side wall of the shell along the lining. And the circulation sleeve comprises a third end and a fourth end which are opposite, the third end is communicated with the second liquid inlet, and the fourth end is communicated with the second liquid outlet.
According to the embodiment of the present disclosure, the reactor further comprises a stirring assembly, wherein the stirring assembly comprises a rotating shaft, and the rotating shaft penetrates through the reactor shell and the discharge hole. And/or the space enclosed by the reactor shell can be divided into a first area close to the oxidant feeding hole and a second area close to the organic matter feeding hole and the organic matter discharging hole. The reactor also comprises a heating assembly and/or a cooling assembly, wherein the heating assembly is arranged outside the first area and used for increasing the temperature in the shell of the reactor, and the cooling assembly is arranged outside the second area and used for cooling a reaction product of the oxidant and the organic matters. And/or the central temperature of the first area is 700-800 ℃ when the reactor is in a working state.
According to the embodiment of the present disclosure, the organic matter supply device includes an organic matter feeding assembly, an alkaline liquid tank, a first peristaltic pump, a first high-pressure pump, and a first check valve. The first peristaltic pump is communicated with the lye tank, the first high-pressure pump is communicated with the lye tank and the first peristaltic pump respectively, and the first one-way valve is arranged between the first high-pressure pump and the organic matter feed inlet. And, above-mentioned organic matter feedway still includes cane sugar solution case, water tank, second peristaltic pump, second high-pressure pump and second check valve, and the second peristaltic pump communicates with cane sugar solution case, and the second high-pressure pump communicates with water tank and second peristaltic pump respectively, and the second check valve sets up between second high-pressure pump and organic matter feed inlet.
According to an embodiment of the present disclosure, the organic feed assembly includes an organic chopper refiner for chopping and grinding solid organic material into a slurry. The organic matter chopping and pulping machine comprises a material pouring box, a shearing knife and a colloid mill which are communicated with each other and are arranged in sequence. The guide box is used for guiding solid organic matters and liquid, and the bottom of the guide box is provided with a guide hole. The shearing knife is arranged above the diversion hole at the bottom of the material guiding box and used for cutting the falling solid organic matters into 1-5 mm of broken slag. The colloid mill is used for grinding the slag flowing out of the flow guide hole into slurry. Wherein, the shearing knife is coaxial with the colloid mill and synchronously rotates under the action of external force. And/or, the shearing knife comprises a first-stage shearing knife and a second-stage shearing knife, the first-stage shearing knife is used for cutting the solid organic matter into fragments of 10-50 mm, the second-stage shearing knife is used for cutting the fragments into crushed slag of 1-5 mm, and the second-stage shearing knife is arranged below the first-stage shearing knife.
The supercritical water oxidation system provided by the present disclosure has the following beneficial effects:
1) through protector's setting, can effectively cool down reaction product to with reaction product separation for residue, condensate and waste gas. Therefore, the supercritical water oxidation system disclosed by the embodiment of the disclosure has an all-in-one machine integrating functions of supercritical reaction, reaction product cooling and separation and the like, and a separator is not required to be additionally arranged, so that the popularization and the application of a supercritical water oxidation technology are facilitated;
2) the liquid pipeline adopts a double-layer sleeve, and the space between the inner layer sleeve and the outer layer sleeve of the double-layer sleeve can be isolated through the design of the inner protective layer. The cooling liquid runs in the outer jacket, while the inner jacket is in communication with the second space in which the reactor is located. When the reactor is abnormally exploded and high-temperature and high-pressure organic release is sprayed out, the release can be guided into the inner sleeve through the inner protective layer and isolated from the external environment of the protective device, and cooling can be realized through the liquid flowing in the outer sleeve. Therefore, the supercritical water oxidation system disclosed by the embodiment of the disclosure is further integrated with a protection function, and abnormal release can be effectively prevented from being sprayed out of the protection device, so that the integration level is high, and the damage of the abnormal release to the external environment can be effectively avoided;
3) through the design of the organic matter conveying pipe and the end part ring pipe in the reactor, the organic matter can be ensured to be uniformly guided into the central chamber of the reactor from the end part and the side wall. And through the design of the feeding plate and the third cylinder, the oxidant can be uniformly guided into the central chamber of the reactor from the end part and the side wall. Thereby the organic matter and the oxidant can be fully contacted and mixed, and the temperature of the central chamber of the reactor reaches 700-800 ℃. Therefore, the advantages of the supercritical water oxidation reaction can be fully exerted, and the complete pyrolysis and gasification of the organic matters are facilitated.
Drawings
The above and other objects, features and advantages of the present disclosure will become more apparent from the following description of embodiments of the present disclosure with reference to the accompanying drawings, in which:
FIG. 1 schematically illustrates a schematic structural diagram of a supercritical water oxidation system according to an embodiment of the present disclosure;
FIG. 2 schematically shows a cross-sectional view A-A in FIG. 1;
FIG. 3 is a schematic view showing the structure of the inner protective layer of FIG. 1;
FIG. 4 schematically illustrates a front cross-sectional view of a reactor according to an embodiment of the disclosure;
FIG. 5 is a schematic enlarged view of the region structure of the dashed box referred to in FIG. 4;
FIG. 6A schematically shows a left side view in section with reference to B-B in FIG. 5;
FIG. 6B schematically shows a right side view in section with reference to B-B in FIG. 5;
FIG. 7 schematically illustrates a schematic structural view of an organic feed device according to an embodiment of the disclosure;
fig. 8 schematically shows a structural view of a rotary cutter refiner according to an embodiment of the present disclosure;
fig. 9 schematically shows a top view of the rotary cutter refiner of fig. 8.
Detailed Description
Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. It should be understood that the description is illustrative only and is not intended to limit the scope of the present disclosure. In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The terms "comprises," "comprising," and the like, as used herein, specify the presence of stated features, steps, operations, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, or components.
All terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art unless otherwise defined. It is noted that the terms used herein should be interpreted as having a meaning that is consistent with the context of this specification and should not be interpreted in an idealized or overly formal sense.
Embodiments of the present disclosure provide a supercritical water oxidation system. The system comprises a reactor, a protection device, a reactor, an oxidant supply device and an organic matter supply device. The reactor comprises a reactor shell, wherein an oxidant feeding hole, an organic matter feeding hole and a discharging hole are formed in the reactor shell, and a reaction product is discharged from the discharging hole. The protection device comprises an outer protection layer, a cooling layer and an inner protection layer, wherein a first space and a second space are formed by the inner protection layer and the outer protection layer in a surrounding mode. The cooling layer is including the liquid pipeline that can save liquid, and the liquid pipeline sets up in first space, and the reactor sets up in the second space, and the discharge gate of reactor extends to the region except that the liquid pipeline is located in the first space for the reaction product that the discharge gate was discharged can be through the liquid cooling of saving in the liquid pipeline. The oxidant feeding device is communicated with the oxidant feeding hole, and the organic matter feeding device is communicated with the organic matter feeding hole.
The supercritical water oxidation system provided by the embodiment of the present disclosure is described below with reference to fig. 1 to 2. Wherein, fig. 1 schematically shows a structural schematic diagram of a supercritical water oxidation system according to an embodiment of the present disclosure, and fig. 2 schematically shows a-a sectional view in fig. 1.
As shown in fig. 1, a supercritical water oxidation system 1 according to an embodiment of the present disclosure includes a reactor 10, a protection device 20, an oxidant supply device 30, and an organic matter supply device 40. The oxidizer supplying device 30 and the organic material supplying device 40 are used to supply an oxidizer and an organic material to the reactor 10, respectively.
The reactor 10 includes a reactor shell 110, and the reactor shell is provided with an organic material inlet 101, an oxidant inlet 102, and a discharge outlet 103. The reactor 10 may in particular be a supercritical water reactor, or even an ultra supercritical water reactor.
Wherein the supercritical state is at a temperature of 374 deg.C or above and a pressure of 22MPa or above. And the ultra supercritical refers to the supercritical state with the temperature reaching above 700 ℃. The organic material is completely miscible with the oxidizing agent when the conditions in the reactor 10 reach a supercritical state. And when the supercritical temperature exceeds 550 ℃, the solubility of the inorganic salt in the organic matter is zero. By virtue of this property, organic matter (which may be, for example, radioactive organic matter, in particular) can be converted into carbon dioxide, water and inorganic salts. The separation of organic matters is realized by utilizing the characteristic that the solubility of inorganic salt is zero at the temperature of more than 550 ℃. The reactor 10 may specifically discharge the reaction product obtained after separation through a discharge port.
As shown in fig. 1-2, the protection device 20 includes an outer protection layer 210, an inner protection layer 220, and a cooling layer 230.
Wherein, the cooling layer 230 comprises a liquid pipe 231 capable of storing liquid, and the inner protective layer 220 and the outer protective layer 21 enclose a first space 2 and a second space 3. A liquid line 231 is arranged in the first space 2 and a reactor 10 is arranged in the second space 3. As shown in fig. 2, the discharge port 103 of the reactor 10 extends to an area other than the area where the liquid line 231 is located in the first space 2, so that the reaction product discharged from the discharge port 103 can be cooled by the liquid stored in the liquid line 231. According to the embodiment of the present disclosure, the discharge hole 103 may specifically extend to a bottom space in the first space 2, wherein, referring to fig. 1, the reactor 10 and the protection device 20 should be vertically placed in actual use, and the organic material inlet 101 is at the bottom.
Wherein, the oxidant supply device 30 is communicated with the oxidant inlet 102; to supply the oxidant to the space (reaction chamber) enclosed by the reactor shell 110. The organic feed device 40 communicates with the organic feed inlet 101 to supply organic to the reaction chamber enclosed by the reactor shell 110.
In summary, the supercritical water oxidation system 1 can effectively reduce the temperature of the reaction product ejected from the outlet 103 by the liquid stored in the liquid pipeline 231 of the protection device 20, and thus obtain the residue, the condensate and the exhaust gas. Therefore, the system 1 has an all-in-one machine integrating functions of supercritical reaction, reaction product cooling and separation and the like, and does not need to additionally arrange a separator when supercritical water oxidation reaction is carried out, thereby being beneficial to popularization and application of supercritical water oxidation technology.
The protection device provided by the embodiment of the disclosure is described below with reference to fig. 1 to 3. Fig. 3 schematically shows a structural diagram of the inner protective layer in fig. 1.
According to an embodiment of the present disclosure, as shown in fig. 1-2, the outer protective layer 210 includes an outer sleeve 211 and a pair of side wall end plates 212 disposed opposite to each other. The liquid line 231 may specifically comprise a plurality of double-walled sleeves. As shown in fig. 2, the double-layer sleeves extend in the connecting line direction of the pair of sidewall end plates 212, and are periodically arranged in the radial direction of the outer sleeve 211 and the circumferential direction of the outer sleeve 211. Each of the plurality of double-walled sleeves includes an outer sleeve 2311 and an inner sleeve 2312.
In the outer shield layer 210, the inner diameter of the outer sleeve 211 may be, for example, the inner diameter
The length can be 3000-6000 mm, and the material can be steel (such as 304 stainless steel), and the environmental pressure is normal pressure, and the temperature is 100 ℃. The two functions are mainly realized, one is to receive the reaction product discharged from the discharge hole 103, and the other is used as a second protective barrier of the reactor. The size of the outer casing in the double-layer casing can be
The inner casing may be sized to
The inner layer pipeline can bear pressure of 3MPa to 5MPa and temperature of 600 ℃.
As shown in fig. 3, the inner shield 220 includes a coaxial first cylinder 221 and a pair of second cylinders 222 disposed opposite to each other, and the first cylinder 221 is disposed between the pair of second cylinders 222 and coaxial with the pair of second cylinders 222. The first cylinder 221 includes a first cylinder sidewall 2211, and the first cylinder 221 has a structure with two open ends.
According to an embodiment of the present disclosure, as shown in fig. 3, each of the pair of second cylinders 222 includes a first end plate 2221 and a second cylinder side wall 2222. The first end plate 2221 has an annular plate structure, the inner annular size of which matches the size of the first cylinder 221, and the pair of second cylinders 222 are fixedly connected to the first cylinder 221 via the first end plate 2221. The first cylinder side wall 2211, the first end plate 2221 and the outer sleeve 211 enclose the first space 2, and the first cylinder 221, the second cylinder 222 and the pair of side wall end plates 212 enclose a second space.
According to the embodiment of the present disclosure, as shown in fig. 3, the first end plate 2221 is provided with a plurality of first ports for communicating with the outer sleeves 2311 of the plurality of double-layer sleeves, respectively.
According to an embodiment of the present disclosure, as shown in fig. 3, the second cylinder side wall 2222 of each of the pair of second cylinders 222 has first openings 2222A, one of which serves as a first liquid inlet and the other of which serves as a first liquid outlet. The shielding device described with reference to FIGS. 1-2 may be configured to: when the reactor disposed in the second space is in a working state, the liquid is circularly introduced from the first liquid inlet, and is discharged from the first liquid outlet after flowing through the outer sleeves 2311 of the plurality of double-layer sleeves, so as to cool the reaction product discharged from the discharge port 103.
According to an embodiment of the present disclosure, as shown in fig. 3, each of the pair of second cylinders 222 further includes a second end plate 2223 opposite the first end plate 2221, and a boundary plate 2224 disposed between the first end plate 2221 and the second end plate 2223.
According to an embodiment of the present disclosure, the length of the inner casing of each of the double-layer casings is greater than that of the outer casing, and the interface plate 2224 may be provided with a plurality of second interfaces 2224A for communicating with the inner casings 2312 of the double-layer casings, respectively. The first opening 2222A may be disposed on the second cylindrical sidewall 2222 between the first end plate 2221 and the interface plate 2224. Since the first opening is a liquid inlet or a liquid outlet, the liquid introduced into the first liquid inlet can only flow into the outer sleeve 2311 and cannot enter the inner sleeve 2312 through the arrangement.
According to an embodiment of the present disclosure, as shown in fig. 3, the second end plate 2223 may be provided with a plurality of communication holes 2223A, for example, for communicating the inner sleeve 2312 with the second space 3 where the reactor 10 is located to form a second barrier of the reactor 10. In case that the reactor 10 is unexpectedly exploded, the high-temperature and high-pressure discharge exploded from the reactor flows into the inner sleeve 2312 through the communication holes 2223A. With this design, the outer sleeve 2311 functions to cool the reaction products discharged from the discharge port 103 when liquid is introduced, and to cool the released products introduced by the inner sleeve under abnormal conditions. Because the inner casing 2312 and the outer casing 2311 are two independent spaces which are not communicated with each other, and the inner casing 2312 is isolated from the external space of the protection device 20 through the outer sleeve forming the space 3, the released objects in an unexpected situation can be effectively prevented from being sprayed out of the external space.
In summary, the protection device 20 of the embodiment of the present disclosure can cool down the normal reaction product, and also can cool down the abnormal release, and on the basis of implementing the product separation function, it also has the protection function, and therefore, various hazards caused by the abnormal high-temperature and high-pressure release spraying out of the external space can be effectively avoided.
According to an embodiment of the present disclosure, the second end plate 2223 and the interface plate 2224 may be, for example, annular plate structures having the same size as the first end plate 2221. The side walls and end plates of the first and second cylinders may have, for example, inner diameters
The pressure which can be born by the work is 3 MPa-5 MPa, and the temperature which can be born is 600 ℃. Wherein the thick wall can be composed of outer skin and main material, the outer skin can be 304 stainless steel, and the main material can be No. 45Carbon steel.
According to an embodiment of the present disclosure, as shown in fig. 2, the cooling layer 230 may include, for example, a condensate collection tray 232 and a plurality of gas pipes 233 in addition to the plurality of double-layered sleeves described above. Wherein the condensate collecting tray 232 is arranged between two adjacent sets of double-layer sleeves arranged periodically in the first space 2 along the radial direction of the outer sleeve. In the two adjacent groups of double-layer sleeves, each group of double-layer sleeves comprises a plurality of double-layer sleeves located in the same radial direction.
According to an embodiment of the present disclosure, the condensate collection tray 232 may particularly for example be located close to the discharge opening 103 in reference to fig. 2, the outer shielding layer 210 further being provided with a discharge opening 2112, the discharge opening 2112 communicating with the condensate collection tray 232. The condensate collecting tray 232 is of a closed structure on a first tray surface close to the discharge hole 103, and is of an open structure on a second tray surface far away from the discharge hole 103. The condensate collection pan 232 has a plurality of grooves 2321 arranged periodically in the axial direction of the outer sleeve 211. The plurality of grooves 2321 extends in a direction perpendicular to a line connecting the first disk surface and the second disk surface. The plurality of gas pipelines 233 extend along the connecting line direction of the first disc surface and the second disc surface and are arranged at the plurality of grooves 2321, the first ends of the plurality of gas pipelines 233 close to the first disc surface are of an open structure, the second ends close to the second disc surface are of a closed structure, the second ends of the plurality of gas pipelines 233 are higher than the second disc surface, the plurality of gas pipelines 233 are provided with a plurality of gas nozzles on the side wall higher than the second disc surface, so that steam and non-condensable gas mixture in reaction products discharged by the discharge port can be transmitted through the plurality of gas pipelines 233, and the steam and the non-condensable gas mixture are sprayed to one side, far away from the discharge port 103, of the second disc surface of the condensate collecting disc 232 from the gas nozzles. The steam sprayed to the side of the second disk surface away from the discharge port 103 cools to form condensate under the action of the liquid stored in the outer casing 2311, falls into the condensate collection tray 232, and is discharged out of the shielding device 20 through the liquid discharge port 2112.
According to the embodiment of the present disclosure, as shown in fig. 2, the outer sleeve 211 of the outer shielding layer 210 may further be provided with an exhaust port 2111 on the second disc surface of the condensate collecting disc 232 away from the cylinder wall of the discharge hole 103, so as to facilitate the non-condensable gas to be discharged out of the shielding device 20. And/or the outer sleeve 211 of the outer protective layer 210 may be further provided with a slag discharge port 2113 on the wall of the cylinder near the discharge port 103, so as to enable the salt slag in the reaction product discharged from the discharge port 103 to be discharged out of the protective device 20 under the action of gravity. It is understood that, since a part of the steam in the reaction product discharged from the discharge port 103 may be cooled to become condensate before being evaporated to the gas line, a part of the condensate is discharged while the slag discharge port 2113 discharges the salt slag.
According to the embodiment of the disclosure, the supercritical water oxidation system may further be provided with a VOC (volatile organic compound) online monitor at the position of the exhaust port 2111, a COD (chemical oxygen demand) online detector at the position of the liquid discharge port 2112, and a pH online monitor at the position of the slag discharge port 2113, so as to determine whether the reaction product may cause harm to the environment.
In summary, the embodiments of the present disclosure can effectively achieve the separation of the reaction product through the arrangement of the gas pipeline and the condensate collecting tray, so that the volume reduction of the organic matter can be maximally achieved.
The reactor 10 of the disclosed embodiment will be described below with reference to fig. 4 to 6B. Wherein fig. 4 schematically shows a front cross-sectional view of a reactor according to an embodiment of the present disclosure, fig. 5 schematically shows an enlarged view of a region structure of a dashed box referred to in fig. 4, fig. 6A schematically shows a left side view of a cross-section referred to B-B in fig. 5, and fig. 6B schematically shows a right side view of a cross-section referred to B-B in fig. 5.
As shown in fig. 4, the reactor 10 of the disclosed embodiment may include a reactor shell 110 including a first end wall 111, a shell side wall 112, and a second end wall 113 disposed opposite the first end wall. The oxidant feed inlet 102 is disposed in the first end wall 111, the discharge outlet 103 is disposed in the second end wall, and the organic feed inlet 101 is disposed in the housing sidewall 112 adjacent the second end wall 113.
According to an embodiment of the present disclosure, the material of the reactor shell 110 may be, for example, INCONEL625, and the inner diameter of the shell sidewall 112 is about 80 to 219mm, and the length is about 1000 to 6000 mm.
According to an embodiment of the present disclosure, the reactor 10 may further include a plurality of organic matter conveying pipes 120, for example, as shown in fig. 4, the plurality of organic matter conveying pipes 120 extend along a connecting line of the first end wall 111 and the second end wall 113 and are disposed in the reactor shell 110, and the plurality of organic matter conveying pipes 120 include a first end and a second end opposite to the first end, where the first end of the organic matter conveying pipe 120 close to the organic matter feed inlet 101 is communicated with the organic matter feed inlet 101.
According to the embodiment of the present disclosure, as shown in fig. 6A to 6B, the plurality of organic matter transport pipes may be arranged at equal intervals in the direction around the central axis of the reactor 10, for example, the number of the organic matter transport pipes may be 12, 6, 4, and the like, and the number of the organic matter transport pipes is not limited in the present disclosure. As shown in fig. 4-6B, the reactor 10 may further include an end loop 130, the end loop 130 is disposed in the reactor housing 110 near the first end wall 111, and the end loop 130 is communicated with the second ends of the organic material transport pipes 120, such that the organic material flowing from the first ends of the organic material transport pipes can flow into the end loop 130. The end ring pipe 130 is provided with a plurality of first discharging holes 131 on a side wall close to the second end wall 113, and/or the plurality of organic matter conveying pipes 120 are provided with a plurality of second discharging holes 121 on a side wall close to the central axis of the reactor 10 and close to the first end wall 111, so that the conveyed organic matter can be uniformly sprayed into the center (specifically, a central chamber) of the region close to the first end wall 111 in the reactor 10 through the first discharging holes 131 and/or the second discharging holes 121.
According to an embodiment of the present disclosure, as shown in fig. 4 to 6B, the reactor 10 may further include a third cylinder 140 and a feeding plate 150. The third cylinder 140 is sleeved outside the organic material transport pipes 120 and the end ring pipe 130. The third cylinder 140 includes a third end plate 141 and a third cylinder sidewall 142, and the third end plate 141 has a first feed hole 1411 corresponding to the oxidant feed port 102. The feed plate 150 is disposed between the third end plate 141 and the end collar 130. The oxidizer-transferring channel 4 is formed between the feed plate 150 and the third cylinder 140, and the feed plate 150 is provided with a plurality of second feed holes 151. By the arrangement of the feeding plate 150 and the third cylinder 140, a part of the oxidant introduced by the oxidant inlet 102 can be injected into the central chamber from the end surface of the reactor 10 through the second feeding hole 151 of the feeding plate 150, and another part of the oxidant is transmitted between the organic material conveying pipe 120 and the side wall 142 of the third cylinder through the oxidant transmission passage 4 and is injected into the central chamber through the gap between two adjacent organic conveying pipes 120.
It is understood that the inner space of the reactor 10 may be divided into two regions with reference to fig. 4 according to the disposition region of the second discharge hole 121. The first zone 11 is a zone close to the oxidant inlet 102, and in the zone, the oxidant and the organic matter can be uniformly sprayed through the arrangement of the discharge holes and the feed holes, so that the supercritical oxidation reaction of the oxidant and the organic matter can be performed in the first zone. The second zone 12 is a zone close to the organic material inlet 101, and since no organic material and oxidant are injected into the second zone 12, and since the second zone 12 is close to the outlet 103, the reaction product obtained by the reaction in the first zone 11 can be transferred to the second zone 12 and discharged out of the reactor 10 through the outlet 103.
In summary, the reactor 10 of the embodiment of the present disclosure can enable the oxidant and the organic substances to be uniformly injected into the center of the first region 11 from the end and the side of the reactor 10 by the arrangement of the organic substance conveying pipe 120, the end loop 130, the third cylinder 140 and the feeding plate 150. Therefore, the oxidant and the organic matter can be fully contacted and mixed and fully reacted, the central temperature of the first area of the reactor is promoted to reach 700-800 ℃, and the full play of the advantages of the supercritical water oxidation reaction is ensured.
According to embodiments of the present disclosure, the reactor 10 may also include, for example, an inner liner 160 and a flow sleeve 170. The inner liner 160 is disposed between the housing sidewall 112 and the third barrel sidewall 142, and the flow sleeve 170 is disposed on the housing sidewall 112 in a spiral winding along the inner liner 160 between the inner liner 160 and the housing sidewall 112. A second liquid inlet 1121 and a second liquid outlet 1122 are further disposed on the side wall 112 of the housing. The annular flow sleeve 170 includes opposing third and fourth ends, the third end communicating with the second inlet port 1121 and the fourth end communicating with the second outlet port 1122. The second liquid inlet 1121 is adjacent to the second end wall 113, and the second liquid outlet 1122 is adjacent to the first end wall 111. When the liquid introduced from the second liquid inlet 1121 flows through the circulation jacket 170 close to the second end wall 113, the heat of the reaction product transferred in the second region 12 can be transferred to the circulation jacket 170 close to the first end wall 111, so as to heat the injected oxidant and organic matters, thereby further increasing the reaction temperature of the organic matters and the oxidant, and ensuring the full exertion of the advantages of the supercritical water oxidation reaction.
According to the embodiment of the present disclosure, the liner 160 and the circulation jacket 170 may be, for example, GH4169, and the inner diameter of the liner 160 may be, for example, 40 to 133mm, and the length may be, for example, 1000 to 6000 mm. The spiral outer diameter of the annulus 170 may be, for example, approximately the inner diameter of the shell sidewall 112, with a pitch of 50mm, with a stainless steel mesh (e.g., 800 mesh stainless steel mesh) filling between the pitches, thereby further increasing the heat transfer area of the liner 160 and the residence time of the liquid, ensuring adequate absorption of heat from the second region 12, and adequate heating of organics and laterally injected oxidant. So that the temperature of the reaction product transferred to the discharge port 103 is not too high, and the reaction temperature of the organic matter and the oxidant can reach the ultra-supercritical condition.
According to an embodiment of the present disclosure, the reactor 10 may further include a heating assembly 180 in order to enable the temperature inside the reactor housing 110 to be rapidly increased and the temperature of the oxidant and the organic matters injected into the first region 11 to reach the supercritical condition. The heating assembly 180 is disposed outside the first zone 11 for elevating the temperature within the reactor housing and thus heating the transported oxidant and organic matter. According to an embodiment of the present disclosure, the reactor 10 may be preheated by the heating assembly 180, for example, the reactor may be preheated to 300 ℃ before introducing the organic and the oxidant.
According to an embodiment of the present disclosure, in order to prevent the reaction product discharged through the discharge hole 103 from damaging the shielding device 20 due to an excessively high temperature, the reactor 10 may further include a cooling assembly 190. The cooling assembly 190 is disposed outside the second zone 12 for cooling the reaction products of the organic matter and the oxidant. The reaction product of the organic material and the oxidant is cooled by the circulation sleeve 170 and the cooling assembly 190, so that the temperature of the reaction product can be effectively reduced, for example, to 120-300 ℃. It will be appreciated that the temperature of the reaction product discharged through the outlet port 103 should not be too low, and that a sufficient temperature is ensured so that the moisture in the reaction product can be vaporized in the form of vapor.
According to the embodiment of the present disclosure, in order to prevent the salt slag in the reaction product passing through the second region 12 from blocking the discharge hole 103 due to deposition and hardening in the region near the second end wall 113, the reactor 10 may further include an agitation assembly 1100. This stirring subassembly 1100 includes the pivot, and this pivot passes reactor housing and discharge gate and stretches into the second region, then through the rotation of this pivot, can realize the stirring to the reactant, avoids the jam to discharge gate 103. The stirring assembly 1100 may be a magnetic stirrer adopting a standard stirring technique of a reaction kettle, for example, a magnetic stirrer with a model of CY-2, which is not limited in this disclosure.
Fig. 7 schematically shows a schematic structural view of an organic material supply device according to an embodiment of the present disclosure.
As shown in fig. 7, the organic material supply device 40 according to the embodiment of the present disclosure may include a first device 41 and a second device 42.
The first device 41 includes an organic material supply assembly 411, an alkaline liquid tank 412, a first peristaltic pump 413, a first high-pressure pump 414, and a first check valve 415. The first peristaltic pump 413 is communicated with the lye tank 412, the first high-pressure pump 414 is respectively communicated with the lye tank 412 and the first peristaltic pump 413, and the first check valve 415 is arranged between the first high-pressure pump 414 and the organic matter feed inlet 101. The first device 41 is used to provide the organic matter that needs to react with the oxidant. The alkali liquor is added into the organic matter, because the organic matter slurry and the alkali liquor are mixed according to a certain proportion (the alkali liquor accounts for 30% -100% of the weight of the organic matter) and then are conveyed into the organic matter conveying pipe, the organic matter and the alkali liquor can be dissolved and alkaline-hydrolyzed mutually through temperature rise, the organic matter is deeply pyrolyzed into small molecules and then is sprayed into the first area 11 from the discharge hole, the quick oxidation of the organic matter and the oxidant is realized, and a large amount of heat is released. The central temperature of the first area 11 can be ensured to meet the requirement of ultra supercritical. In addition, as the organic matter alkaline hydrolysis process is an endothermic reaction, when the organic matter is transmitted in the organic matter conveying pipe, the organic matter alkaline hydrolysis can absorb the heat of the peripheral space of the first area, so that the temperature of the area close to the reactor shell 110 is effectively reduced, and the requirement on the high temperature resistance of the reactor shell material is reduced.
Wherein the second device 42 comprises a sucrose solution tank 421, a water tank 422, a second peristaltic pump 423, a second high pressure pump 424 and a second one-way valve 425. The second peristaltic pump 423 is communicated with the sucrose solution tank 421, the second high-pressure pump 424 is respectively communicated with the water tank 422 and the second peristaltic pump 423, and the second check valve 425 is arranged between the second high-pressure pump 424 and the organic matter feed inlet 101.
When using the supercritical water oxidation system that this disclosure provided to carry out organic matter supercritical oxidation, can preheat reactor 10 through heating element 180 in referring to fig. 4 earlier, after preheating to 300 ℃, communicate second device 42 and organic matter feed inlet 101, with the leading-in organic matter conveyer pipe 120 of sucrose solution, because reactor 10 has preheated to 300 ℃, the sucrose solution produces a large amount of heats because of taking place the pyrolysis under this 300 ℃ environment, can further heat the reactor. After heating the reactor temperature to 650 ℃, with first device 41 intercommunication organic matter feed inlet 101, to leading-in the organic matter of treating the oxidation in organic matter conveyer pipe 120, simultaneously lead-in oxidant through oxidant feed inlet 102, evenly spout organic matter and the oxidant of first region 11 and take place supercritical water oxidation reaction in the twinkling of an eye under 650 ℃ of environment, release a large amount of heats, make the central zone temperature of first region 11 reach 700 ~ 800 ℃, reach super supercritical condition, then follow-up organic matter of spouting can take place super supercritical water oxidation reaction with the oxidant, make the complete pyrolysis gasification of organic matter, guarantee the full play of supercritical water oxidation reaction advantage.
According to the embodiment of the present disclosure, the organic material feeding assembly 411 may specifically select different assemblies according to the type of the organic material to be oxidized, for example, when the organic material is organic waste liquid, only a liquid tank is required to be used as the organic material feeding assembly 411. When the organic material is solid organic material, a device capable of chopping the solid organic material into slurry should be used as the organic material feeding unit 411.
According to an embodiment of the present disclosure, the oxidizer supply device 30 may include, for example, a liquid oxygen dewar, a liquid oxygen pump, a check valve, a liquid oxygen vaporizer, and a high pressure oxygen cylinder set to supply an oxidizer to the reactor 10.
According to an embodiment of the present disclosure, the supercritical water oxidation system may further include a monitoring component, for example, the monitoring component includes at least one of the following components: a temperature sensor disposed on the reactor shell 110 at the discharge port 103, the condensate collection pan 232, or a pressure sensor disposed within the reactor shell 110, or the like. The monitoring assembly can be configured to control the pressure and/or flow of the oxide feed, the pressure and/or flow of the organic feed, and the temperature and pressure of the reactor 10.
Fig. 8 schematically shows a structural view of a rotary cutter refiner according to an embodiment of the present disclosure; fig. 9 schematically shows a top view of the rotary cutter refiner of fig. 8.
When the organic material is solid organic material, a rotary refiner 411 shown in fig. 8 to 9, for example, can be used as the organic material feeding unit to chop and grind the solid organic material into pulp.
As shown in fig. 8 to 9, the rotary-cut pulping machine 411 includes a material guiding box 4111, a shearing knife, and a colloid mill 4114, which are connected to each other and arranged in sequence. The material guiding box 4111 is configured to introduce solid organic matters and liquid (the liquid here may be, for example, condensate flowing from the condensate collecting tray 232 in fig. 2, so as to achieve recycling of the liquid), and a bottom of the material guiding box 4111 is provided with a flow guiding hole. The shearing knife is arranged above the flow guide hole at the bottom of the material guide box 4111 and is used for cutting falling solid organic matters into 1-5 mm of broken slag. The colloid mill 4114 is used to grind the slag flowing out of the flow-guiding hole into slurry. Wherein, the shearing knife is coaxial with the colloid mill and synchronously rotates under the action of external force.
According to the embodiment of this disclosure, the sword is sheared to above-mentioned one-level includes that sword 4112 and second grade are sheared sword 4113 are sheared to the one-level, and sword 4112 is sheared to the one-level is used for cutting solid organic matter into 10 ~ 50 mm's fragment, and sword 4113 is sheared to the second grade is used for cutting the fragment into 1 ~ 5 mm's disintegrating slag, and sword 4113 is sheared to the second grade sets up in the one-level and shears sword 4112 below.
According to an embodiment of the present disclosure, as shown in fig. 8 to 9, the primary shearing blade 4112 mainly comprises a primary rotary cutting blade 4112A, a primary stationary upper cutting blade 4112B, and a primary stationary lower cutting blade 4112C. Wherein, there are 4 primary stationary upper cutters 4112B, which are uniformly fixed on the inner wall of the material guiding box 4111 at a position about the lower third of the material guiding box 4111, the primary stationary upper cutters 4112B are triangular, and the distance between the apex of the triangle and the side wall of the material guiding box 4111 is about 190 mm. The primary stationary lower cutter 4112C is located directly below the primary stationary upper cutter 4112B, and the distance between the two is just enough to accommodate the primary rotary cutter 4112A. The first-stage static lower cutter 4112C is also triangular, and the distance from the apex of the triangle to the side wall of the material guiding box 4111 is about 250 mm. The main body of the first-stage rotary cutter 4112A is a narrow and long strip-shaped plate, the length is about 570mm, the width is about 100mm, the thickness is about 5mm, two upward blades are welded on two sides of the axis, the height of each blade is about 50mm, the distance from the axis is about 100mm, and sharp acute angles are ground by all the blades. The primary rotary cutter 4112A is designed to shear radioactive solid waste at high speed both vertically and horizontally.
According to the embodiment of the present disclosure, as shown in fig. 8 to 9, the secondary shearing blade 4113 is composed of a secondary rotary cutting blade 4113A and a secondary stationary plate 4113B, the secondary rotary cutting blade 4113A is a narrow and long strip-shaped plate, the length of the secondary rotary cutting blade 4113A is about 570mm, the width of the secondary rotary cutting blade is about 100mm, the thickness of the secondary rotary cutting blade is about 5mm, the distance between the secondary stationary plate 4113B and the secondary rotary cutting blade 4113A is as small as possible, and the diameters of the secondary stationary plate 4113B are uniformly distributed and distributed
Is sheared again by the secondary rotary cutter 4113A as the fragment passes through the bore. The crushed slag sheared by the secondary shearing knife 4113 flows into the colloid mill 4114 through a diversion hole on the lower surface of the barrel, and is further ground to 50 μm in the colloid mill 4114.
In summary, the supercritical water oxidation system described with reference to fig. 1 to 9 can achieve a supercritical water reaction temperature of organic matters of 700 ℃ to 800 ℃, which solves the problem that the intractable wastes (such as amines, anion exchange resins, etc.) can not be sufficiently oxidized. And the supercritical water oxidation system of the disclosure integrates the functions of organic matter oxidation, effluent separation, equipment protection and the like, and brings great convenience to engineering application. The processing capacity of the supercritical water oxidation system of the embodiment of the disclosure can reach 20-200 kg/h, and the requirements of volume reduction and harm reduction of solid combustible materials generated by uranium ore purification, nuclear fuel pretreatment plants, nuclear fuel manufacturing plants, spent fuel post-treatment plants and the like can be met.
Those skilled in the art will appreciate that various combinations and/or combinations of features recited in the various embodiments and/or claims of the present disclosure can be made, even if such combinations or combinations are not expressly recited in the present disclosure. In particular, various combinations and/or combinations of the features recited in the various embodiments and/or claims of the present disclosure may be made without departing from the spirit or teaching of the present disclosure. All such combinations and/or associations are within the scope of the present disclosure.
The embodiments of the present disclosure have been described above. However, these examples are for illustrative purposes only and are not intended to limit the scope of the present disclosure. Although the embodiments are described separately above, this does not mean that the measures in the embodiments cannot be used in advantageous combination. The scope of the disclosure is defined by the appended claims and equivalents thereof. Various alternatives and modifications can be devised by those skilled in the art without departing from the scope of the present disclosure, and such alternatives and modifications are intended to be within the scope of the present disclosure.
Claims (8)
1. A supercritical water oxidation system, comprising:
the reactor comprises a reactor shell, wherein an oxidant feeding hole, an organic matter feeding hole and a discharging hole are formed in the reactor shell, and a reaction product is discharged from the discharging hole;
protector, including outer inoxidizing coating, cooling layer and interior inoxidizing coating, wherein:
a first space and a second space are formed by the inner protective layer and the outer protective layer in a surrounding manner;
the cooling layer comprises a liquid pipeline capable of storing liquid, and the liquid pipeline is arranged in the first space;
the reactor is arranged in the second space, and a discharge port of the reactor extends to a region except the region of the liquid pipeline in the first space, so that a reaction product discharged from the discharge port can be cooled through liquid stored in the liquid pipeline;
the oxidant supply device is communicated with the oxidant feeding hole; and
the organic matter feeding device is communicated with the organic matter feeding hole;
the outer protective layer comprises an outer sleeve and a pair of side wall end plates which are oppositely arranged;
the inner protective layer comprises a coaxial first cylinder and a pair of oppositely arranged second cylinders, the first cylinder is arranged between the pair of second cylinders and is coaxial with the pair of second cylinders, and the inner protective layer comprises:
the first cylinder comprises a first cylinder side wall and is of a structure with two open ends;
each second cylinder body in the pair of second cylinder bodies comprises a first end plate and a second cylinder body side wall, the first end plate is of an annular plate structure, the size of the inner ring of the first end plate is matched with that of the first cylinder body, and the pair of second cylinder bodies are fixedly connected with the first cylinder body through the first end plate;
the first cylinder side wall, the first end plate and the outer sleeve enclose the first space, and the first cylinder, the second cylinder and the pair of side wall end plates enclose the second space;
the liquid pipeline comprises a plurality of double-layer sleeves which extend along the connecting line direction of the pair of side wall end plates, the double-layer sleeves are periodically arranged in the radial direction of the outer sleeve and the circumferential direction of the outer sleeve, each double-layer sleeve comprises an outer layer sleeve and an inner layer sleeve,
the first end plate is provided with a plurality of first interfaces which are respectively communicated with outer sleeves of the double-layer sleeves;
wherein:
the second side wall of each second cylinder in the pair of second cylinders is provided with a first opening, one first opening is used as a first liquid inlet, the other first opening is used as a first liquid outlet,
the guard is configured to: when the reactor arranged in the second space is in a working state, the liquid is circularly led in from the first liquid inlet and led out from the first liquid outlet after flowing through the outer sleeves of the double-layer sleeves, so as to cool the reaction product discharged from the discharge port.
2. The supercritical water oxidation system of claim 1, wherein:
each of the pair of second cylinders further includes a second end plate opposite to the first end plate, and an interface plate disposed between the first end plate and the second end plate, the first opening being disposed on a side wall between the first end plate and the interface plate;
the interface plate is provided with a plurality of second interfaces which are respectively communicated with inner sleeves of the double-layer sleeves, the length of the inner sleeve is longer than that of the outer sleeve, the second end plate is provided with a plurality of communicating holes which are used for communicating the inner sleeve with the second space,
the second end plate and the boundary plate are of the same annular plate structure as the first end plate.
3. The supercritical water oxidation system of claim 1, wherein the cooling layer further comprises a plurality of gas lines and a condensate collection tray, wherein:
the condensate collecting disc is arranged between two adjacent groups of double-layer sleeves which are periodically arranged in the first space along the radial direction of the outer sleeve, the first disc surface of the condensate collecting disc close to the discharge port is of a closed structure, and the second disc surface of the condensate collecting disc far away from the discharge port is of an open structure; the condensate collecting disc is provided with a plurality of grooves which are periodically arranged in the axial direction of the outer sleeve, and the grooves extend in the direction perpendicular to the connecting line of the first disc surface and the second disc surface;
the plurality of gas pipelines extend along the connecting line direction of the first disc surface and the second disc surface and are arranged at the plurality of grooves, the first ends of the plurality of gas pipelines close to the first disc surface are of an open structure, the second ends of the plurality of gas pipelines close to the second disc surface are of a closed structure, the second ends of the plurality of gas pipelines are higher than the second disc surface, and the side walls of the plurality of gas pipelines higher than the second disc surface are provided with a plurality of gas nozzles,
the outer protective layer is provided with a slag discharge port, a liquid discharge port and an exhaust port, the slag discharge port, the liquid discharge port and the exhaust port are respectively used for discharging residues in reaction products and cooling the reaction products to obtain condensate and waste gas, and the liquid discharge port is communicated with the condensate collecting disc.
4. The supercritical water oxidation system of claim 1, wherein the reactor housing comprises a first end wall, a housing side wall, and a second end wall disposed opposite the first end wall, the oxidant feed inlet is disposed in the first end wall, the discharge outlet is disposed in the second end wall, the organic feed inlet is disposed on the housing side wall proximate the second end wall, the reactor further comprising:
the organic matter conveying pipes extend along the connecting line direction of the first end wall and the second end wall and are arranged in the reactor shell, each organic matter conveying pipe comprises a first end and a second end opposite to the first end, and the first ends of the organic matter conveying pipes are communicated with the organic matter feeding holes; and
an end loop disposed within the reactor housing in a region proximate the first end wall and in communication with the second ends of the plurality of organic transport tubes,
wherein the end collar is provided with a plurality of first discharge holes in a side wall adjacent to the second end wall; and/or a plurality of second discharge holes are formed in the side walls, close to the central axis of the reactor and close to the first end wall, of the organic matter conveying pipes.
5. The supercritical water oxidation system of claim 4, wherein the reactor further comprises:
the third cylinder is sleeved outside the organic matter conveying pipes and the end circular pipe and comprises a third end plate and a third cylinder side wall, and the third end plate is provided with a first feeding hole corresponding to the oxidant feeding hole; and
and the feeding plate is arranged between the third end plate and the end ring pipe so as to form an oxidant transmission channel between the feeding plate and the third cylinder body, and a plurality of second feeding holes are formed in the feeding plate.
6. The supercritical water oxidation system of claim 5, wherein:
a second liquid inlet and a second liquid outlet are also arranged on the side wall of the shell,
the reactor further comprises:
the lining is arranged between the side wall of the shell and the side wall of the third cylinder; and
and the circulation sleeve is spirally wound between the lining and the side wall of the shell and comprises a third end and a fourth end which are opposite, the third end is communicated with the second liquid inlet, and the fourth end is communicated with the second liquid outlet.
7. The supercritical water oxidation system of claim 1, wherein:
the reactor further comprises:
the stirring assembly comprises a rotating shaft, and the rotating shaft penetrates through the reactor shell and the discharge hole; and/or
The space that reactor shell encloses can be divided into the first region that is close to the oxidant feed inlet and be close to the organic matter feed inlet and the second region of discharge gate, wherein:
the reactor further comprises:
a heating assembly disposed outside of the first zone for elevating a temperature within the reactor shell; and/or
The cooling assembly is arranged outside the second area and used for cooling reaction products of the oxidant and the organic matters; and/or
When the reactor is in a working state, the central temperature of the first area is 700-800 ℃.
8. The supercritical water oxidation system of claim 1, wherein:
the organic matter feeding device comprises an organic matter feeding assembly, an alkaline liquid tank, a first peristaltic pump, a first high-pressure pump and a first one-way valve, the first peristaltic pump is communicated with the alkaline liquid tank, the first high-pressure pump is respectively communicated with the alkaline liquid tank and the first peristaltic pump, and the first one-way valve is arranged between the first high-pressure pump and the organic matter feeding port; and
the organic matter feeding device further comprises: the device comprises a sucrose solution tank, a water tank, a second peristaltic pump, a second high-pressure pump and a second one-way valve, wherein the second peristaltic pump is communicated with the sucrose solution tank, the second high-pressure pump is communicated with the water tank and the second peristaltic pump respectively, and the second one-way valve is arranged between the second high-pressure pump and the organic matter feed inlet.
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| CN201910108862.9A CN109851029B (en) | 2019-02-03 | 2019-02-03 | Supercritical water oxidation system |
| EP20748407.2A EP3919446A4 (en) | 2019-02-03 | 2020-01-20 | Treatment of radioactive organic solid waste by supercritical water oxidation |
| PCT/CN2020/073313 WO2020156336A1 (en) | 2019-02-03 | 2020-01-20 | Treatment of radioactive organic solid waste by supercritical water oxidation |
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| CN111632565B (en) * | 2020-05-24 | 2021-09-03 | 西安交通大学 | Micro-channel rapid cooling device for preparing nano powder by supercritical hydrothermal synthesis technology |
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| FR2814967B1 (en) * | 2000-10-10 | 2003-11-14 | Commissariat Energie Atomique | METHOD AND DEVICE FOR SUPERCRITICAL WATER OXIDATION OF MATERIALS |
| FR2891161B1 (en) * | 2005-09-28 | 2007-11-16 | Commissariat Energie Atomique | REACTOR AND METHOD FOR ANOXIA TREATMENT OF A MATERIAL IN A FLUID REACTION ENVIRONMENT |
| JP5789983B2 (en) * | 2011-01-04 | 2015-10-07 | 株式会社リコー | Waste liquid treatment equipment |
| CN202778422U (en) * | 2012-07-24 | 2013-03-13 | 苏州市华元化工有限公司 | Uniform liquid inlet device for reaction kettle |
| CN202921275U (en) * | 2012-12-05 | 2013-05-08 | 潍坊乐多收生物工程有限公司 | Mild reaction feed liquid feeding device of reaction kettle |
| FR3001156B1 (en) * | 2013-01-18 | 2016-10-21 | Commissariat Energie Atomique | HYDROTHERMAL OXIDATION DEVICE FOR TREATING MATERIAL IN A SUPERCRITICAL MEDIUM AND METHOD OF IMPLEMENTING THE SAME |
| CN105152509B (en) * | 2015-09-10 | 2017-11-14 | 新奥科技发展有限公司 | The supercritical processing methods of supercritical reaction device, supercritical reaction system and sludge |
| CN105782995A (en) * | 2016-05-17 | 2016-07-20 | 山东大学 | Jet combustion device and method for super-critical water oxidization of organic matter |
| FR3060416B1 (en) * | 2016-12-16 | 2019-05-31 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | REACTOR FOR THE HYDROTHERMAL OXIDATION TREATMENT OF ORGANIC MATTER IN A REACTIONAL ENVIRONMENT |
| CN107930538B (en) * | 2017-12-26 | 2020-02-07 | 新奥科技发展有限公司 | Supercritical water oxidation reactor, supercritical water oxidation system and supercritical water oxidation method |
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