CN106215843A - A kind of overcritical water oxidization reactor - Google Patents
A kind of overcritical water oxidization reactor Download PDFInfo
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- CN106215843A CN106215843A CN201610710750.7A CN201610710750A CN106215843A CN 106215843 A CN106215843 A CN 106215843A CN 201610710750 A CN201610710750 A CN 201610710750A CN 106215843 A CN106215843 A CN 106215843A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 95
- 238000007254 oxidation reaction Methods 0.000 title abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 48
- 238000006243 chemical reaction Methods 0.000 claims description 47
- 238000009284 supercritical water oxidation Methods 0.000 claims description 34
- 238000010791 quenching Methods 0.000 claims description 13
- 238000010992 reflux Methods 0.000 claims description 7
- 238000000889 atomisation Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 6
- 239000011162 core material Substances 0.000 abstract 9
- 238000005530 etching Methods 0.000 abstract 1
- 238000002156 mixing Methods 0.000 description 15
- 239000000047 product Substances 0.000 description 14
- 239000007795 chemical reaction product Substances 0.000 description 7
- 238000005260 corrosion Methods 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 239000012530 fluid Substances 0.000 description 5
- 229910017053 inorganic salt Inorganic materials 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 239000011295 pitch Substances 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000010815 organic waste Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012454 non-polar solvent Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000000629 steam reforming Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/26—Nozzle-type reactors, i.e. the distribution of the initial reactants within the reactor is effected by their introduction or injection through nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0006—Controlling or regulating processes
- B01J19/0013—Controlling the temperature of the process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
- B01J19/006—Baffles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J3/00—Processes of utilising sub-atmospheric or super-atmospheric pressure to effect chemical or physical change of matter; Apparatus therefor
- B01J3/02—Feed or outlet devices therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J3/00—Processes of utilising sub-atmospheric or super-atmospheric pressure to effect chemical or physical change of matter; Apparatus therefor
- B01J3/04—Pressure vessels, e.g. autoclaves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
- B01J4/001—Feed or outlet devices as such, e.g. feeding tubes
- B01J4/002—Nozzle-type elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
- B01J4/008—Feed or outlet control devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2204/00—Aspects relating to feed or outlet devices; Regulating devices for feed or outlet devices
- B01J2204/002—Aspects relating to feed or outlet devices; Regulating devices for feed or outlet devices the feeding side being of particular interest
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00049—Controlling or regulating processes
- B01J2219/00051—Controlling the temperature
- B01J2219/00074—Controlling the temperature by indirect heating or cooling employing heat exchange fluids
- B01J2219/00076—Controlling the temperature by indirect heating or cooling employing heat exchange fluids with heat exchange elements inside the reactor
- B01J2219/00085—Plates; Jackets; Cylinders
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention provides a kind of overcritical water oxidization reactor.Wherein this overcritical water oxidization reactor includes: housing, inner core and deflection plate；Wherein, the top of housing offers material input, and the bottom of housing offers product delivery outlet；Inner core is sheathed in described housing, and material input is connected with inner core by pipeline, is material delivery outlet, has preset pitch between material delivery outlet and housing bottom bottom inner core；Inner core and inner walls are enclosed and are set as an annular space, in deflection plate is placed in annular space and are connected with the outer wall of inner core；The sidewall of housing arranges the first chilled water entrance.In the present invention, the sidewall of reactor shell arranges the first chilled water entrance, reactor inner tank theca arranges deflection plate, so, flow continuously along deflection plate wall outer tube from the chilled water of the first chilled water entrance input, uniform encirclement reactor inner core, enhances the cooling-down effect to inner core, effectively alleviates the etching problem of reactor inner core material under hot conditions.
Description
Technical Field
The invention relates to the technical field of supercritical oxidation, in particular to a supercritical water oxidation reactor.
Background
The supercritical water oxidation technology is a method of oxidizing organic wastes by "burning" the organic wastes using supercritical water as a medium and air, oxygen, or the like as an oxidizing agent under high-temperature and high-pressure conditions exceeding the critical point of water (T374 ℃, P22.1 MPa). Because supercritical water has liquid-like density, dissolving capacity and good fluidity, the supercritical water is a nonpolar solvent and also has gas-like diffusion coefficient and low viscosity. In supercritical waterDisappearance of the interface of the gas and liquid phases, organic matter and O2Completely dissolved in supercritical water to form a homogeneous system, and the reaction speed is greatly accelerated. In the reaction residence time of less than 1min even several seconds, more than 99.9 percent of organic matters are quickly combusted and oxidized into CO2、H2O, inorganic salt and other non-toxic and harmless end products, and simultaneously, a large amount of heat energy can be released in the oxidation reaction process and can be efficiently recycled.
However, under supercritical conditions, high temperature, high pressure, high concentration of dissolved oxygen can cause oxidative corrosion of the reactor internals. The existing supercritical water oxidation reactor generally comprises a shell and an inner cylinder, wherein the inner cylinder is arranged in the shell, an inlet is usually arranged at the top of the shell, an outlet is arranged at the bottom of the shell, chilling water is conveyed into the shell from the inlet through a fluid conveying device, and when flowing from top to bottom in the shell, the chilling water flows through the inner cylinder, exchanges heat with materials in the inner cylinder and then is discharged from the outlet. The chilling water entering from the shell inlet can directly flow downwards in the shell under the action of self gravity, the retention time in the shell is short, the heat exchange time between the chilling water and the reaction materials in the inner barrel is short, even part of the chilling water is discharged from an outlet without exchanging heat with the reaction materials in the inner barrel, the structure ensures that the contact time between the chilling water and the inner barrel is short, the inner barrel cannot be fully cooled, and the inner barrel is subjected to oxidation corrosion of high-temperature dissolved oxygen due to overhigh temperature.
Disclosure of Invention
In view of the above, the invention provides a supercritical water oxidation reactor, and aims to solve the problem of corrosion of materials inside the reactor due to poor cooling effect of a chilling zone in the structure of the conventional supercritical water oxidation reactor.
In one aspect, the present invention provides a supercritical water oxidation reactor, comprising: the shell, the inner cylinder and the baffle plate; the top of the shell is provided with a material input port, and the bottom of the shell is provided with a product output port; the inner cylinder is sleeved in the shell, the material input port is communicated with the inner cylinder through a pipeline, the bottom of the inner cylinder is a material output port, and a preset distance is formed between the material output port and the bottom of the shell; the inner cylinder and the inner wall of the shell are enclosed to form an annular space, and the baffle plate is arranged in the annular space and is connected with the outer wall of the inner cylinder; the side wall of the shell is provided with a first chilling water inlet.
Further, in the above supercritical water oxidation reactor, the region enclosed by the inner cylinder is a reaction region, and the reaction region includes: the device comprises a jet flow area, a reflux area and a pipe flow area, wherein the jet flow area, the reflux area and the pipe flow area are distributed according to preset volumes, so that the height-diameter ratio of the reaction area is a preset value.
Further, in the supercritical water oxidation reactor, the material inlet is provided with a nozzle, and the nozzle is arranged to match with the height-diameter ratio of the reaction zone, so that the atomization angle alpha of the nozzle ranges from 30 degrees to 60 degrees.
Furthermore, in the supercritical water oxidation reactor, the baffle plate is spirally wound outside the inner cylinder.
Furthermore, in the supercritical water oxidation reactor, the spiral pitches of the baffle plates wound spirally are equal.
Further, in the supercritical water oxidation reactor, the first chilled water inlet is arranged above the baffle plate.
Furthermore, in the supercritical water oxidation reactor, a second chilling water inlet is formed in the side wall of the shell, and the second chilling water inlet is arranged close to the material output port of the inner cylinder.
Furthermore, in the supercritical water oxidation reactor, at least two second quench water inlets are provided, and each second quench water inlet is distributed along the circumferential direction of the shell.
Furthermore, in the supercritical water oxidation reactor, each second chilled water inlet is uniformly distributed along the circumferential direction of the shell, and the second chilled water inlets are arranged so that the incident direction of the chilled water is along the tangential direction of the circumference of the side wall of the shell.
Further, the supercritical water oxidation reactor further comprises: locking the bucket; wherein the lock hopper is connected to a product output port of the housing.
In the invention, the side wall of the reactor shell is provided with the first chilling water inlet, and the outer wall of the reactor inner cylinder is provided with the baffle plate, so that chilling water input from the first chilling water inlet can continuously flow along the baffle plate from top to bottom on the outer wall of the inner cylinder, thereby uniformly surrounding the reactor inner cylinder, enhancing the cooling effect on the reactor inner cylinder and effectively relieving the corrosion problem of the reactor inner cylinder material under the high-temperature condition.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a schematic structural diagram of a supercritical water oxidation reactor provided in an embodiment of the present invention;
fig. 2 is a schematic distribution diagram of a reaction zone of a supercritical water oxidation reactor according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1, a preferred structure of the supercritical water oxidation reactor provided in the present embodiment is shown. This supercritical water oxidation reactor includes: a shell 1, an inner cylinder 2 and a baffle plate 4. The top of the shell 1 is provided with a material input port 11, the bottom of the shell 1 is provided with a product output port 14, and the shell 1 can be a hollow cylinder with one open end; the inner cylinder 2 is sleeved in the shell 1, namely: the top of the inner cylinder 2 is connected with the top of the shell through a pipeline and is suspended in the shell 1; the material input port 11 is communicated with the inner cylinder 2 through a pipeline, the bottom of the inner cylinder 2 is a material output port 21, a preset interval is formed between the material output port 21 and the bottom of the shell 1, the preset interval means that a gap is formed between the bottom of the inner cylinder and the bottom of the shell, and the size of the interval can be determined according to the specific requirements of reaction. The inner cylinder 2 and the inner wall of the shell 1 are enclosed to form an annular space, the baffle plate 4 is arranged in the annular space and is connected with the outer wall of the inner cylinder 2, and the baffle plate 4 is a plate for changing the flow direction of fluid and can be selected according to the property and flow of a fluid medium and the size of a reactor; the side wall of the shell 1 is provided with a first chilling water inlet 3, and the first chilling water inlet 3 can be arranged at the position, close to the top of the inner cylinder 2, of the upper part of the side wall of the shell 1 or at the position, close to the outlet at the bottom of the inner cylinder, of the lower part of the side wall of the shell 1.
It will be understood by those skilled in the art that the volume of the reaction zone may be determined by the residence time of the materials involved in the reaction and the corresponding volumetric flow rate of gas under the particular temperature and pressure conditions; the aspect ratio of the reaction zone may be determined according to the distribution of the flow field in the reaction zone.
In the embodiment, an annular region enclosed by the inner cylinder 2 and the inner wall of the shell 1 is a chilling zone 13, and the chilling zone 13 is used for reducing the wall temperature of the inner cylinder 2 and the shell 1; the area enclosed by the material outlet 21 and the bottom of the housing 1 is the mixing zone 12. The basic process of the supercritical water oxidation reaction is as follows: the material to be treated is sprayed into the reactor from the input port 11 at the top of the shell 1 to carry out supercritical water oxidation reaction in the reaction zone 22, the high-temperature reaction product after the reaction is discharged into the mixing zone 12 from the material output port 21 at the bottom of the inner cylinder 2, meanwhile, the chilling water is input from the first chilling water inlet 3, flows from top to bottom on the wall surface of the inner cylinder 2 along the baffle plate 4, and is discharged into the mixing zone 12 from the gap between the inner cylinder 2 and the shell 1, so that the mixing of the high-temperature reaction product and the chilling water is realized.
In the embodiment, the first chilling water inlet 3 is arranged above the baffle plate 4, so that the chilling water directly flows continuously along the wall surface of the inner cylinder 2 under the guiding action of the baffle plate 4 after entering the shell 1, the retention time of the chilling water on the wall surface is prolonged, and the cooling effect on the wall surface of the inner cylinder is enhanced; in addition, the chilling water can flow from the top to the bottom of the inner cylinder 2 under the action of smaller resistance by utilizing the gravity, and the flow of the chilling water on the wall surface of the inner cylinder 2 is realized without using equipment with high pressure level, so that the equipment cost is reduced.
Preferably, the baffle plate 4 is spirally wound on the side wall of the inner cylinder 2, and the fluid circulation channel of the spiral baffle plate is continuous, so that the chilling water input from the first chilling water inlet 3 can continuously and spirally flow, the chilling water can be ensured to fill the gap between the wall of the reactor and the inner cylinder, and a chilling area can uniformly surround the inner cylinder 2 of the reactor, so that the temperature of the outer wall of the inner cylinder 2 of the reactor is reduced, and the oxidation corrosion of the outer wall of the inner cylinder 2 of the reactor under the high-temperature condition is relieved; on the other hand, the temperature of the reactor shell 1 is reduced, the heat dissipation loss is reduced, the material selection standard of the reactor shell 1 is reduced, and the manufacturing cost of the reactor can be greatly reduced.
Further preferably, the helical baffles 4 have the same pitch. When the pitch is too large, the flow speed of the chilling water is correspondingly reduced, so that the heat transfer effect between the chilling zone and the reaction zone is poor, and the outer wall is easy to overtemperature; when the pitch is too small, the flow rate of the chilling water is correspondingly increased, so that the temperature in the reaction zone is easily reduced, and the temperature required by the supercritical water oxidation reaction is difficult to maintain. In the specific reaction process, the temperature in the reaction zone is controlled to be more than 550 ℃, the temperature of the shell of the reactor is controlled to be less than 300 ℃, and the pitch of the baffle plate is determined according to the flow rate of chilled water and the temperature requirements of the reaction zone and the shell.
In the embodiment, the first chilling water inlet 3 is arranged on the side wall of the reactor shell 1, and the baffle plate 4 is arranged on the outer wall of the reactor inner cylinder 2, so that chilling water input from the first chilling water inlet 3 can continuously flow from top to bottom on the outer wall of the inner cylinder 2 along the baffle plate 4, so that the reactor inner cylinder 2 is uniformly surrounded, the cooling effect on the wall surface of the reactor inner cylinder 2 is enhanced, and the corrosion problem of the material of the reactor inner cylinder 2 under the high-temperature condition is effectively relieved.
In the above embodiment, the area enclosed by the inner cylinder 2 is the reaction area 22, and after the temperature of the material with high calorific value and low ignition point is raised, the material is mixed with oxygen and enters the reaction area 22 to release a large amount of heat, so as to provide the reaction area 22 with high temperature and high pressure conditions, so that the supercritical state is achieved in the reaction area 22, and the supercritical water oxidation reaction of the raw material to be treated can be ensured. Wherein the reaction zone 22 comprises: a jet zone 221, a reflux zone 222, and a tube flow zone 223; the reflux zone 222 has a smaller volume at the top of the reaction zone 22, the jet zone 221 has a larger volume at the middle of the reaction zone 22 and is conically shaped, and the tube flow zone 223 is located at the lower portion of the reaction zone 22. It should be noted that the jet region 221 is a gasification reaction region of carbonaceous material; the medium in the recirculation zone 222 is combustion product carbon residue, water vapor and a small amount of oxygen from the jet zone under the action of convection entrainment; the reactions carried out in the tubular flow region 223 are mainly heterogeneous gasification reactions of carbon, methane and steam reforming reactions, reverse shift reactions, and the like. The jet zone 221, the reflux zone 222 and the tube flow zone 223 are distributed in a predetermined volume such that the ratio of the height to the diameter of the reaction zone 22 is a predetermined value. Specifically, the preset value of the aspect ratio can be determined according to the volume size distribution requirement of each region in the reaction zone 22, and the volume of the reaction zone 22 is determined according to the residence time of the material. Generally, the jet zone 221 has a larger volume and is located in the middle of the reaction zone 22 and is conically distributed, and the tube flow zone 223 is located in the lower portion of the reaction zone 22, and the volume is greatly influenced by the aspect ratio, and the higher the aspect ratio, the larger the tube flow zone 223 is.
In the above embodiment, the material inlet 11 is provided with the nozzle 111, and the nozzle 111 is arranged in cooperation with the height-diameter ratio of the reaction zone 22, so that the atomization angle α of the nozzle 111 ranges from 30 ° to 60 °. Specifically, after the height-diameter ratio is determined, the position of the nozzle 111 can be determined, so that the value range of the atomization angle alpha is 30-60 degrees, the flow velocity of gas-phase materials in the materials is ensured to be more than 80 m/s, and the materials can be reacted more fully.
In this embodiment, the ratio of water in the material to be treated is large, the remaining components are a small amount of solid particles and inorganic salts, the water in the reaction zone 22 is supercritical water, the inorganic salts are precipitated in the supercritical water and discharged to the mixing zone 12 from the material outlet 21, the high-temperature reaction product is mixed with the chilled water input from the first chilled water inlet 3 in the mixing zone 12 and then cooled, so that the water in the mixing zone 12 can be cooled to a subcritical state, and the precipitated inorganic salts in the product can be dissolved in subcritical water.
In the above embodiment, the sidewall of the shell 1 is provided with the second chilled water inlet 31, and the second chilled water inlet 31 is arranged close to the material output port 21 of the inner cylinder 2, that is, the second chilled water inlet 31 is arranged corresponding to the mixing zone 21, so that chilled water input from the second chilled water inlet 31 can be ensured to directly enter the mixing zone 12, and cooperates with chilled water input from the first chilled water inlet 3 to cool a high-temperature reaction product in the mixing zone 12, so that supercritical water in the product is gradually converted into subcritical water, and meanwhile, a certain degree of disturbance is formed on the material in the mixing zone 12, so that inorganic salt precipitated in the product is gradually dissolved in subcritical water.
Preferably, there are at least two second chilling water inlets 31, and each second chilling water inlet 31 is distributed along the circumferential direction of the shell 1, referring to fig. 1, a third chilling water inlet 32 may be further formed in the side wall of the shell 1, wherein the second chilling water inlet 31 and the third chilling water inlet 32 are oppositely arranged to form a double-spraying form, and the temperature of the high-temperature reaction product is reduced to make the water in the product reach a subcritical state, and simultaneously, the disturbance on the material in the mixing zone 12 is enhanced, so that the dissolution of the inorganic salt precipitated in the product in subcritical water is accelerated.
It is further preferred that each second quench water inlet 31 is evenly distributed in the circumferential direction of the shell 1, i.e. a plurality of second quench water inlets 31 are symmetrically arranged in the circumferential direction of the shell 1, such that the second quench water inlets form a multi-group spray pattern. The material turbulence in the mixing zone 12 is made more severe, thereby ensuring that a small amount of particulate matter therein is discharged out of the housing 1 along with the main flow of product without clogging the bottom of the housing 1.
Still more preferably, each second chilled water inlet 31 is arranged to enable the incident direction of the chilled water to be along the tangential direction of the circumference of the side wall of the shell 1, namely, the sprayed chilled water is formed into a vortex shape, and further, the disturbance of the mixing zone 12 is enhanced, so that inorganic salts in the material are dissolved in subcritical water in the mixing zone 12 more quickly and completely, solid particles carried in the material are disturbed continuously, and are discharged from a product outlet along with the discharge of a reaction product without being deposited at the bottom of the shell 1, and the problem of blockage of the outlet of the reactor is effectively solved.
In the above embodiment, the method further includes: locking the bucket; wherein, the lock hopper is connected with the product output port 14 of the shell 1, and the solid particles in the reactor and a part of precipitated inorganic salt can be discharged out of the reactor in a mode of intermittent operation of the lock hopper, thereby avoiding the blockage of the outlet of the reactor.
In conclusion, the baffle plate is connected to the inner cylinder of the reactor, and the chilling water inlet is arranged at the position, close to the upper part of the baffle plate, of the side wall of the shell, so that the chilling water is ensured to uniformly surround the inner cylinder of the reactor, the control of the wall surface temperature of the inner cylinder and the shell temperature is realized, and the oxidation corrosion of reactor materials is relieved; meanwhile, a second chilling water inlet is formed in a material outlet close to the inner cylinder on the side wall of the shell, so that disturbance to product fluid is formed, particles and inorganic salt in the product are discharged out of the system, and the problem of blockage of the shell outlet is solved.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A supercritical water oxidation reactor, comprising: the device comprises a shell (1), an inner cylinder (2) and a baffle plate (4); wherein,
a material input port (11) is formed in the top of the shell (1), and a product output port (14) is formed in the bottom of the shell (1);
the inner cylinder (2) is sleeved in the shell (1), the material inlet (11) is communicated with the inner cylinder (2) through a pipeline, the bottom of the inner cylinder (2) is provided with a material outlet (21), and a preset distance is reserved between the material outlet (21) and the bottom of the shell (1);
the inner cylinder (2) and the inner wall of the shell (1) enclose an annular space, and the baffle plate (4) is arranged in the annular space and connected with the outer wall of the inner cylinder (2);
the side wall of the shell (1) is provided with a first chilling water inlet (3).
2. Supercritical water oxidation reactor according to claim 1, characterized in that the area enclosed by the inner drum (2) is a reaction zone (22), the reaction zone (22) comprising: a jet flow zone (221), a reflux zone (222) and a pipe flow zone (223), wherein the jet flow zone (221), the reflux zone (222) and the pipe flow zone (223) are distributed according to preset volumes, so that the height-diameter ratio of the reaction zone (22) is a preset value.
3. Supercritical water oxidation reactor according to claim 2, characterized in that the material inlet (11) is provided with a nozzle (111), and the nozzle (111) is arranged in cooperation with the height-diameter ratio of the reaction zone (22) such that the atomization angle α of the nozzle (111) ranges from 30 ° to 60 °.
4. The supercritical water oxidation reactor according to claim 1, characterized in that the baffle plate (4) is spirally wound outside the inner cylinder (2).
5. Supercritical water oxidation reactor according to claim 4, characterized in that the spiral pitch of the baffles (4) wound in a spiral shape is equal.
6. Supercritical water oxidation reactor according to claim 1, characterized in that the first quench water inlet (3) is placed above the baffles (4).
7. Supercritical water oxidation reactor according to claim 1, characterized in that the housing (1) side wall is opened with a second quench water inlet (31), and the second quench water inlet (31) is arranged close to the material outlet (21) of the inner drum (2).
8. Supercritical water oxidation reactor according to claim 7, characterized in that the number of second quench water inlets (31) is at least two and that each of the second quench water inlets (31) is distributed along the circumference of the shell (1).
9. Supercritical water oxidation reactor according to claim 8, characterized in that the secondary quench water inlets (31) are evenly distributed along the circumference of the shell (1), the secondary quench water inlets (31) being arranged such that the direction of incidence of the quench water is tangential to the circumference of the shell (1) side wall.
10. The supercritical water oxidation reactor of claim 1 further comprising: locking the bucket; wherein the lock hopper is connected to a product outlet (14) of the housing (1).
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| CN107930538A (en) * | 2017-12-26 | 2018-04-20 | 新奥科技发展有限公司 | A kind of overcritical water oxidization reactor, supercritical water oxidation system and method |
| CN109012493A (en) * | 2018-08-16 | 2018-12-18 | 宋波 | Depressurize operation type fuel rod application apparatus |
| WO2019127041A1 (en) * | 2017-12-26 | 2019-07-04 | 新奥科技发展有限公司 | Supercritical water oxidation nozzle and supercritical water oxidation reactor |
| CN111113677A (en) * | 2020-01-04 | 2020-05-08 | 陈必祥 | High-precision quantitative reaction system for A material and B material for concrete preparation |
| CN117209037A (en) * | 2023-09-27 | 2023-12-12 | 北京新风航天装备有限公司 | Horizontal supercritical water oxidation reactor and reaction method |
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| CN111113677A (en) * | 2020-01-04 | 2020-05-08 | 陈必祥 | High-precision quantitative reaction system for A material and B material for concrete preparation |
| CN111113677B (en) * | 2020-01-04 | 2021-08-03 | 永丰上达建材实业有限公司 | High-precision quantitative reaction system for A material and B material for concrete preparation |
| CN117209037A (en) * | 2023-09-27 | 2023-12-12 | 北京新风航天装备有限公司 | Horizontal supercritical water oxidation reactor and reaction method |
| CN117209037B (en) * | 2023-09-27 | 2024-05-28 | 北京新风航天装备有限公司 | Horizontal supercritical water oxidation reactor and reaction method |
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