CN112340915A - Wet-type oxidation micro-interface system - Google Patents
Wet-type oxidation micro-interface system Download PDFInfo
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- CN112340915A CN112340915A CN202011129282.7A CN202011129282A CN112340915A CN 112340915 A CN112340915 A CN 112340915A CN 202011129282 A CN202011129282 A CN 202011129282A CN 112340915 A CN112340915 A CN 112340915A
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- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 89
- 230000003647 oxidation Effects 0.000 title claims abstract description 88
- 239000007788 liquid Substances 0.000 claims abstract description 100
- 239000002351 wastewater Substances 0.000 claims abstract description 37
- 238000009279 wet oxidation reaction Methods 0.000 claims abstract description 28
- 239000000463 material Substances 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000003756 stirring Methods 0.000 claims description 16
- 238000007599 discharging Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 abstract description 18
- 238000002347 injection Methods 0.000 abstract description 6
- 239000007924 injection Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 description 18
- 238000006243 chemical reaction Methods 0.000 description 11
- 239000007789 gas Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- 239000012071 phase Substances 0.000 description 8
- 239000007791 liquid phase Substances 0.000 description 7
- 239000002994 raw material Substances 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- 239000007921 spray Substances 0.000 description 6
- 230000000875 corresponding effect Effects 0.000 description 5
- 238000005507 spraying Methods 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000000855 fermentation Methods 0.000 description 2
- 230000004151 fermentation Effects 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 206010063385 Intellectualisation Diseases 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000001276 controlling effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000005501 phase interface Effects 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/093—Cleaning containers, e.g. tanks by the force of jets or sprays
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/727—Treatment of water, waste water, or sewage by oxidation using pure oxygen or oxygen rich gas
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/74—Treatment of water, waste water, or sewage by oxidation with air
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/26—Reducing the size of particles, liquid droplets or bubbles, e.g. by crushing, grinding, spraying, creation of microbubbles or nanobubbles
Abstract
The invention provides a wet oxidation micro-interface system, comprising: the device comprises a waste water heat exchanger, a waste water heater and an oxidation reactor, wherein the waste water heat exchanger is provided with a material inlet, a material outlet, a heat source inlet and a heat source outlet; the oxidized water from the oxidation reactor enters a waste water heat exchanger from a heat source inlet, and a material outlet is connected with a waste water heater; the middle area of the bottom surface of the oxidation reactor is upwards protruded to form a plane, liquid outlets are respectively arranged on the two side flat parts of the protruded plane of the bottom surface of the oxidation reactor, and a liquid inlet is arranged on the side wall of the oxidation reactor; the upper part in the oxidation reactor is provided with a liquid ejector, the bottom of the liquid ejector is a plane, the top of the liquid ejector is a semicircular arc surface, a plurality of injection ports are sequentially arranged on the semicircular arc surface, the injection direction of the injection ports faces the top of the oxidation reactor, and the liquid inlet is connected with the bottom of the liquid ejector through a pipeline. The wet oxidation micro-interface system saves the cost of cleaning and field operation.
Description
Technical Field
The invention relates to the field of wet oxidation, in particular to a wet oxidation micro-interface system.
Background
At present, the wet oxidation technology generally has higher operation temperature and higher pressure, so that the requirements on equipment are higher, the energy consumption is high, the cost is high, the operation safety is also reduced, the equipment is easy to age and damage, the retention time of oxygen in a reactor in the reaction oxidation process is short, most of oxygen is floated out of the reactor without sufficient reaction, and the reaction efficiency is reduced, and the treatment cost is also increased.
In addition, the existing wet oxidation reactor needs a lot of manpower in the process of maintenance and cleaning, including the washing of the inside of the oxidation reactor through a manhole, the field operation of each pipeline valve, and the like. Therefore, the labor cost is improved, and the production safety is reduced.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The invention aims to provide a wet oxidation micro-interface system, which is characterized in that a liquid ejector is arranged in an oxidation reactor, on one hand, the liquid ejector can efficiently crush water for cleaning the oxidation reactor into micron-sized liquid drops, and the liquid ejector impacts the upper part of the oxidation reactor to replace manual cleaning, so that the effect of improving mass transfer is achieved.
In order to achieve the above purpose of the present invention, the following technical solutions are adopted:
the invention provides a wet oxidation micro-interface system, comprising: the device comprises a waste water heat exchanger, a waste water heater and an oxidation reactor, wherein the waste water heat exchanger is provided with a material inlet, a material outlet, a heat source inlet and a heat source outlet; the oxidized water from the oxidation reactor enters the wastewater heat exchanger from the heat source inlet, and the material outlet is connected with the wastewater heater;
the middle area of the bottom surface of the oxidation reactor is upwards protruded to form a plane, liquid outlets are respectively arranged at the two side flat parts of the protruded plane of the bottom surface of the oxidation reactor, and a liquid inlet is arranged on the side wall of the oxidation reactor; the oxidation reactor is characterized in that a liquid ejector is arranged at the inner upper part of the oxidation reactor, the bottom of the liquid ejector is a plane, the top of the liquid ejector is a semicircular arc surface, a plurality of jet orifices are sequentially arranged on the semicircular arc surface, the jet direction of the jet orifices faces the top of the oxidation reactor, and the liquid inlet is connected with the bottom of the liquid ejector through a pipeline.
The wet oxidation micro-interface system provided by the invention specifically works by firstly primarily filtering wastewater, then sending the wastewater into a wastewater heat exchanger to exchange heat with wastewater which is discharged from an oxidation reactor and subjected to wet oxidation treatment, then further heating the wastewater by a wastewater heater after heat exchange, sending the heated wastewater into the oxidation reactor to be subjected to oxidation treatment, and carefully cleaning the inside of the oxidation reactor by clean water which is sprayed out through a spray opening before the oxidation reactor works.
In the prior art, a great deal of manpower is needed in the process of overhauling and cleaning the wet oxidation reactor, and the process comprises the steps of entering the oxidation reactor through a manhole for washing, performing field operation on valves of various pipelines and the like. Therefore, the labor cost is improved, and the production safety is reduced.
The invention provides a wet oxidation micro-interface system with a specific structure in order to improve the cleaning effect of the wet oxidation micro-interface system, and cleaning water is efficiently crushed into fog in the spraying process of a spray opening arranged on a semicircular cambered surface, so that the spraying effect is improved, and the mass transfer effect is correspondingly improved. Of course, the raw materials can be sprayed in the feeding process, and the raw materials are efficiently crushed into mist through the spraying openings, so that the contact area between the raw materials is increased, the reaction efficiency is improved, and the indexes such as the conversion rate and the yield of the raw materials are further improved.
In addition, the reason why the center position of the bottom of the oxidation reactor is protruded upwards is to discharge the materials in the oxidation reactor from the liquid outlet efficiently, and if the bottom is flat, a small amount of materials are left, so that the center position of the bottom of the oxidation reactor is preferably protruded upwards to form a plane according to the scheme of the invention. Of course, the bulge is in a semicircular arc shape, so that the possibility of liquid accumulation can be reduced. And the discharge port is arranged in a conical structure, so that the discharge of the materials can be accelerated.
Preferably, a mesh surface with a plurality of uniformly distributed micropores is laid in each spray opening.
The liquid ejector is mainly connected with the liquid inlet through a pipeline, cleaning water is introduced into the liquid ejector and is ejected through the ejection openings on the semicircular arc surface of the liquid ejector, the semicircular arc surface structure is designed to improve the cleaning effect and ensure that the ejected cleaning water can carry out all-around cleaning on the wall surface of the oxidation reactor, and in addition, preferably, a net surface with a plurality of micropores uniformly distributed is paved in each ejection opening, so that the ejected water is atomized after being broken and dispersed to improve the mass transfer effect, and the corresponding effect of the micro-interface generator is also achieved.
Preferably, the liquid inlet is connected with the central position of the bottom of the liquid ejector through a pipeline, so that the entering liquid just enters from the middle of the liquid ejector, and the liquid can be ejected more uniformly.
Preferably, a stirring paddle is arranged at the central bulge of the bottom in the oxidation reactor to play a role in accelerating discharge. The bellied position sets up the stirring rake also is in order to improve fermentation product exhaust efficiency, can also promote fermentation efficiency through the stirring moreover.
In order to improve the stirring effect, the number of the stirring paddles is preferably two, and the stirring paddles are arranged at the convex plane at the bottom of the oxidation reactor side by side.
Preferably, the number of the liquid inlet is two, one of the liquid inlets is connected with the liquid ejector through a pipeline, and the other liquid inlet is arranged at a position close to the bottom of the oxidation reactor. When the inside of the oxidation reactor is cleaned, the effect of cleaning the upper part in the oxidation reactor can be achieved, and the effect of cleaning the lower part in the oxidation reactor can also be achieved.
Preferably, the invention can also arrange a micro-interface generator in the oxidation reactor, the micro-interface generator is arranged right below the liquid ejector, and the micro-interface generator and the liquid ejector are combined for use, so as to improve the effect of mutual cooperation between the micro-interface generator and the liquid ejector.
Preferably, the number of the micro-interface generators is two, and the micro-interface generators are arranged from top to bottom in sequence. The micro-interface generator is designed such that two micro-interface generators can be used in cooperation with each other, and the specific type thereof is preferably a pneumatic micro-interface generator because the pneumatic type is relatively low in cost and easy to install.
Preferably, two air inlets for entering compressed air are arranged on the side wall of the oxidation reactor, an air pressure device is connected to each air inlet, and each air inlet is connected with a corresponding micro-interface generator through a pipeline. After air or oxygen is compressed by the air compression device, the air or oxygen enters the micro-interface generator from the air inlet to be dispersed and crushed. And the air inlets are preferably in one-to-one correspondence with the micro-interface generators, so that the air inlet efficiency can be improved.
The micro-interface generator in the oxidation reactor breaks air into micro-bubbles with micron scale, and releases the micro-bubbles to the inside, so that the phase boundary mass transfer area between raw materials in the reaction process is increased, two phases are in full contact, the concentration of dissolved gas in a liquid phase is improved, the efficiency is improved, and the reaction time is shortened.
It will be appreciated by those skilled in the art that the micro-interface generator used in the present invention is described in the prior patents of the present inventor, such as the patents of application numbers CN201610641119.6, CN201610641251.7, CN201710766435.0, CN106187660, CN105903425A, CN109437390A, CN205833127U and CN 207581700U. The detailed structure and operation principle of the micro bubble generator (i.e. micro interface generator) is described in detail in the prior patent CN201610641119.6, which describes that "the micro bubble generator comprises a body and a secondary crushing member, wherein the body is provided with a cavity, the body is provided with an inlet communicated with the cavity, the opposite first end and second end of the cavity are both open, and the cross-sectional area of the cavity decreases from the middle of the cavity to the first end and second end of the cavity; the secondary crushing member is disposed at least one of the first end and the second end of the cavity, a portion of the secondary crushing member is disposed within the cavity, and an annular passage is formed between the secondary crushing member and the through holes open at both ends of the cavity. The micron bubble generator also comprises an air inlet pipe and a liquid inlet pipe. "the specific working principle of the structure disclosed in the application document is as follows: liquid enters the micro-bubble generator tangentially through the liquid inlet pipe, and gas is rotated at a super high speed and cut to break gas bubbles into micro-bubbles at a micron level, so that the mass transfer area between a liquid phase and a gas phase is increased, and the micro-bubble generator in the patent belongs to a pneumatic micro-interface generator.
In addition, the first patent 201610641251.7 describes that the primary bubble breaker has a circulation liquid inlet, a circulation gas inlet and a gas-liquid mixture outlet, and the secondary bubble breaker communicates the feed inlet with the gas-liquid mixture outlet, which indicates that the bubble breakers all need to be mixed with gas and liquid, and in addition, as can be seen from the following drawings, the primary bubble breaker mainly uses the circulation liquid as power, so that the primary bubble breaker belongs to a hydraulic micro-interface generator, and the secondary bubble breaker simultaneously introduces the gas-liquid mixture into an elliptical rotating ball for rotation, thereby realizing bubble breaking in the rotating process, so that the secondary bubble breaker actually belongs to a gas-liquid linkage micro-interface generator. In fact, the micro-interface generator is a specific form of the micro-interface generator, whether it is a hydraulic micro-interface generator or a gas-liquid linkage micro-interface generator, however, the micro-interface generator adopted in the present invention is not limited to the above forms, and the specific structure of the bubble breaker described in the prior patent is only one of the forms that the micro-interface generator of the present invention can adopt.
Furthermore, the prior patent 201710766435.0 states that the principle of the bubble breaker is that high-speed jet flows are used to achieve mutual collision of gases, and also states that the bubble breaker can be used in a micro-interface strengthening reactor to verify the correlation between the bubble breaker and the micro-interface generator; moreover, in the prior patent CN106187660, there is a related description on the specific structure of the bubble breaker, see paragraphs [0031] to [0041] in the specification, and the accompanying drawings, which illustrate the specific working principle of the bubble breaker S-2 in detail, the top of the bubble breaker is a liquid phase inlet, and the side of the bubble breaker is a gas phase inlet, and the liquid phase coming from the top provides the entrainment power, so as to achieve the effect of breaking into ultra-fine bubbles, and in the accompanying drawings, the bubble breaker is also seen to be of a tapered structure, and the diameter of the upper part is larger than that of the lower part, and also for better providing the entrainment power for the liquid phase.
Since the micro-interface generator was just developed in the early stage of the prior patent application, the micro-interface generator was named as a micro-bubble generator (CN201610641119.6), a bubble breaker (201710766435.0) and the like in the early stage, and is named as a micro-interface generator in the later stage along with the continuous technical improvement, and the micro-interface generator in the present invention is equivalent to the micro-bubble generator, the bubble breaker and the like in the prior art, and has different names.
In summary, the micro-interface generator of the present invention belongs to the prior art, although some micro-interface generators belong to the pneumatic type micro-interface generator, some micro-interface generators belong to the hydraulic type micro-interface generator, and some micro-interface generators belong to the gas-liquid linkage type micro-interface generator, the difference between the types is mainly selected according to the different specific working conditions, and the connection between the micro-interface generator and the reactor and other devices, including the connection structure and the connection position, is determined according to the structure of the micro-interface generator, which is not limited.
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the wet oxidation micro-interface system, the liquid ejector is arranged in the oxidation reactor, on one hand, the liquid ejector can efficiently crush water for cleaning the oxidation reactor into micron-sized liquid drops, and the micron-sized liquid drops are cleaned by impacting the ejector above the oxidation reactor instead of manpower, and in addition, raw materials actually participating in reaction can also be efficiently crushed into micron-sized liquid drops, so that the effect of improving reaction mass transfer is achieved;
(2) the wet oxidation micro-interface system can realize the cooperative cooperation of the liquid ejector and the micro-interface generator, so that the micro-interface generator can crush air into micro-bubbles with micron scale and release the micro-bubbles into the interior, thereby increasing the phase boundary mass transfer area between raw materials in the reaction process, leading the two phases to be fully contacted, improving the concentration of dissolved gas in a liquid phase, improving the efficiency and shortening the reaction time.
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 wet oxidation micro-interface system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a mesh surface of a wet oxidation micro-interface system according to an embodiment of the present invention.
Description of the drawings:
10-an oxidation reactor; 101-liquid inlet;
102-a liquid outlet; 103-a liquid ejector;
1031-jet orifice; 1032-mesh side;
104-stirring paddle; 105-a micro-interface generator;
106-air inlet; 20-air compression means;
30-a waste water heat exchanger; 301-material inlet;
302-material outlet; 303-heat source inlet;
304-a heat source outlet; 40-a waste water heater.
Detailed Description
The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings and the detailed description, but those skilled in the art will understand that the following described embodiments are some, not all, of the embodiments of the present invention, and are only used for illustrating the present invention, and should not be construed as limiting the scope of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In order to more clearly illustrate the technical solution of the present invention, the following description is made in the form of specific embodiments.
Examples
Referring to fig. 1, a wet oxidation micro-interface system according to an embodiment of the present invention mainly includes a waste water heat exchanger 30, a waste water heater 40, and an oxidation reactor 10; the waste water heat exchanger 30 is provided with a material inlet 301, a material outlet 302, a heat source inlet 303 and a heat source outlet 304; the oxidized water from the oxidation reactor enters the wastewater heat exchanger 30 from the heat source inlet 303, and the material outlet 302 is connected with the wastewater heater 40; a liquid ejector 103 and a micro-interface generator 105 are arranged in the oxidation reactor 10, the micro-interface generator 105 is just arranged right below the liquid ejector 103, a liquid inlet 101 is arranged on the side wall of the oxidation reactor 10, two air inlets 106 for compressed air to enter are also arranged, the liquid ejector 103 is connected with the liquid inlet 101 through a pipeline, the bottom plane of the liquid ejector 103 is provided with a semicircular cambered surface on the top surface, a plurality of injection ports 1031 are sequentially arranged on the semicircular cambered surface, the injection direction of the injection ports 1031 faces the top of the oxidation reactor 10, the liquid inlet 101 is connected with the bottom of the liquid ejector 103 through a pipeline, and is optimally connected with the center of the bottom of the liquid ejector 103, the liquid entering the liquid jet head 103 is broken into micro-droplets having a diameter of a micrometer scale and jetted from the jet port 1031 having a convex surface to collide with the top of the oxidation reactor for efficient cleaning. In order to improve the spraying effect, a mesh surface 1032 with a plurality of uniformly distributed micropores is laid in the spraying opening 1031, the number of the mesh surfaces 1032 is not limited, in order to spray the liquid in a mist form and improve the mass transfer effect, and the structure of the mesh surface 1032 is specifically shown in fig. 2.
The number of the micro interface generators is two, the micro interface generators are sequentially arranged from top to bottom, the two air inlets 106 are both connected with the air compression device 20, and each air inlet 106 is connected with the corresponding micro interface generator through a pipeline.
The bottom of the oxidation reactor 10 is provided with a liquid outlet 102 for discharging the material accumulated at the bottom of the oxidation reactor 10. The bottom both sides of oxidation reactor 10 level and smooth, and central point puts the arch that makes progress and is the plane, levels the position in the both sides of oxidation reactor 10 bottom and is provided with respectively liquid outlet 102, liquid outlet 102 are used for the discharge waste liquid, and the protruding plane in oxidation reactor 10 bottom center is provided with stirring rake 104 in order to play the effect of arranging the material with higher speed, and the direction of blade is up to be used for the stirring when oxidation reactor 10 bottom is washed and is discharged the liquid, and the rotational speed can infinitely variable control. Preferably, the number of the stirring paddles is two, and the stirring paddles are arranged side by side at the raised plane at the bottom of the oxidation reactor 10.
In order to improve the mass transfer effect, two liquid inlets 101 are arranged on the side wall of the oxidation reactor 10, wherein one liquid inlet 101 is connected with the liquid ejector 103 through a pipeline, and the other liquid inlet 101 is arranged at a position close to the bottom of the oxidation reactor 10. This allows for efficient feed to various locations within oxidation reactor 10.
This embodiment also includes a PLC (or DCS, PLC and DCS) control system: is connected with a sensor of the oxidation reactor 10 and is used for intelligently controlling the process operation and parameters, thereby realizing the remote control of the production and conforming to the intellectualization of the production.
The working process of the wet oxidation micro-interface system provided by the embodiment of the invention is as follows:
(1) cleaning: the cleaning water above the oxidation reactor 10 is conveyed to the interior of the liquid ejector 103 through the liquid inlet 101, sprayed out through the spray opening 1031 on the arc surface, efficiently crushed into micron-sized (d is more than or equal to 1 mu m and less than 1mm) liquid drops through the mesh surface 1032, sprayed out from the spray opening 1031 protruding from the surface of the liquid ejector 103, collided with the top of the oxidation reactor 10 and cleaned above. The cleaned droplets form a liquid level at the bottom of the tank, and when the liquid level rises to the middle of the oxidation reactor 10, the upper water delivery valve is closed, and the stirring paddle 104 at the bottom is opened to 200 rpm. Because the installation direction of the blades of the stirring paddle 104 is downward, the liquid above the blades is pumped to the two sides below the blades, and vortexes are formed on the two sides of the stirring paddle 104, so that the two sides of the lower part of the oxidation reactor 10 are washed and cleaned. And simultaneously opening a water channel below, washing the side wall of the oxidation reactor by input water flow under the action of a stirring paddle 104, closing a water delivery valve after washing for 30min, reducing the rotating speed to 100rpm/min, discharging water through the liquid outlets 102 on two sides of the lower end of the oxidation reactor 10, closing the liquid outlets 102, and reducing the rotating speed to 50 rpm/min.
(2) The work is as follows: the waste water is sent into the waste water heat exchanger 30 from the material inlet 301 through the delivery pump for heat exchange, the waste water is sent out from the material outlet 302 and is further heated through the waste water heater 40, the heated waste water enters the oxidation reactor for oxidation treatment, the compressed air or the compressed oxygen compressed by the air compressor 20 is introduced from the side wall air inlet 106 of the oxidation reactor, the waste water is firstly treated by the micro-interface generator 105 and then undergoes oxidation reaction so as to improve the mass transfer efficiency of a phase interface, the top of the oxidation reactor is provided with an emptying port, and the purified water treated by the oxidation reactor enters the waste water heat exchanger 30 from the heat source inlet 303 to exchange heat with the waste water to be treated and then is sent out from the heat source outlet 304 for recycling.
The operation and technological parameters of the wet oxidation micro-interface system in the working process are completely controlled by a control system of a PLC (or a DCS, a PLC and a DCS), and the control system is connected with each sensor on the oxidation reactor 10, so that the automatic intelligent control is realized, and the labor cost is saved.
The reaction temperature of the oxidation reactor 10 is 200-220 ℃, and the reaction pressure is 2-3 MPa.
In the above embodiment, the number of the pump bodies is not specifically required, and the pump bodies may be arranged at corresponding positions as required.
In a word, the scheme of the invention realizes the dispersion and crushing of the liquid phase and the gas phase by the cooperative matching of the liquid ejector and the micro-interface generator, so that the mass transfer effect of the system can be improved by crushing the substances in each phase into micron particles.
The wet oxidation micro-interface system has high treatment capacity, ensures higher wet oxidation treatment effect under the condition of lower energy consumption, has the harmful substance and COD removal rate of 99 percent, is convenient to clean, and saves manual operation.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. A wet oxidation micro-interface system, comprising: the device comprises a waste water heat exchanger, a waste water heater and an oxidation reactor, wherein the waste water heat exchanger is provided with a material inlet, a material outlet, a heat source inlet and a heat source outlet; the oxidized water from the oxidation reactor enters the wastewater heat exchanger from the heat source inlet, and the material outlet is connected with the wastewater heater;
the middle area of the bottom surface of the oxidation reactor is upwards protruded to form a plane, liquid outlets are respectively arranged at the two side flat parts of the protruded plane of the bottom surface of the oxidation reactor, and a liquid inlet is arranged on the side wall of the oxidation reactor; the oxidation reactor is characterized in that a liquid ejector is arranged at the inner upper part of the oxidation reactor, the bottom of the liquid ejector is a plane, the top of the liquid ejector is a semicircular arc surface, a plurality of jet orifices are sequentially arranged on the semicircular arc surface, the jet direction of the jet orifices faces the top of the oxidation reactor, and the liquid inlet is connected with the bottom of the liquid ejector through a pipeline.
2. The wet oxidation micro-interface system of claim 1, wherein a micro-interface generator is disposed within the oxidation reactor, the micro-interface generator being disposed directly below the liquid injector.
3. The wet oxidation micro-interface system of claim 2, wherein the number of the micro-interface generators is two, arranged from top to bottom.
4. The system according to claim 3, wherein two air inlets for compressed air are provided on the side wall of said oxidation reactor, said two air inlets being connected to an air pressure device, each of said air inlets being connected to a corresponding micro-interface generator by a conduit.
5. The wet oxidation micro-interface system of claim 1, wherein the oxidation reactor is provided with a stirring paddle at the upward protrusion of the bottom to accelerate the discharging.
6. The wet oxidation micro-interface system of claim 5, wherein the number of paddles is two and are arranged side-by-side at the raised plane of the bottom of the oxidation reactor.
7. The wet oxidation micro-interface system according to any one of claims 1 to 6, wherein the number of the liquid inlet ports is two, one of the liquid inlet ports is connected to the liquid ejector through a pipe, and the other liquid inlet port is disposed near the bottom of the oxidation reactor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011129282.7A CN112340915A (en) | 2020-10-21 | 2020-10-21 | Wet-type oxidation micro-interface system |
| PCT/CN2020/122883 WO2022082626A1 (en) | 2020-10-21 | 2020-10-22 | Wet oxidation micro-interface system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011129282.7A CN112340915A (en) | 2020-10-21 | 2020-10-21 | Wet-type oxidation micro-interface system |
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| CN112340915A true CN112340915A (en) | 2021-02-09 |
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| CN202011129282.7A Withdrawn CN112340915A (en) | 2020-10-21 | 2020-10-21 | Wet-type oxidation micro-interface system |
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| WO (1) | WO2022082626A1 (en) |
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| WO2022082626A1 (en) | 2022-04-28 |
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