CN112479340A - Wet oxidation treatment system and method for industrial wastewater - Google Patents
Wet oxidation treatment system and method for industrial wastewater Download PDFInfo
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- CN112479340A CN112479340A CN201910859278.7A CN201910859278A CN112479340A CN 112479340 A CN112479340 A CN 112479340A CN 201910859278 A CN201910859278 A CN 201910859278A CN 112479340 A CN112479340 A CN 112479340A
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- 239000010842 industrial wastewater Substances 0.000 title claims abstract description 39
- 238000009279 wet oxidation reaction Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000006243 chemical reaction Methods 0.000 claims abstract description 84
- 239000007788 liquid Substances 0.000 claims abstract description 54
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000001301 oxygen Substances 0.000 claims abstract description 35
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 35
- 239000007789 gas Substances 0.000 claims abstract description 30
- 239000003999 initiator Substances 0.000 claims abstract description 23
- 238000003756 stirring Methods 0.000 claims abstract description 15
- 238000000926 separation method Methods 0.000 claims abstract description 12
- 239000000839 emulsion Substances 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 5
- 239000010959 steel Substances 0.000 claims abstract description 5
- 238000001514 detection method Methods 0.000 claims description 11
- 238000007599 discharging Methods 0.000 claims description 9
- 239000003054 catalyst Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 4
- 230000009467 reduction Effects 0.000 claims description 4
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical group OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 3
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 3
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims 1
- 239000000498 cooling water Substances 0.000 description 4
- 238000004880 explosion Methods 0.000 description 4
- 238000013022 venting Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- 229910001882 dioxygen Inorganic materials 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 230000005501 phase interface Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 229910000856 hastalloy Inorganic materials 0.000 description 1
- 239000006193 liquid solution Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- 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
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
-
- 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
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
- C02F1/766—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens by means of halogens other than chlorine or of halogenated compounds containing halogen other than chlorine
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/02—Temperature
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/03—Pressure
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/40—Liquid flow rate
-
- 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
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention provides a wet oxidation treatment system for industrial wastewater and a wet oxidation treatment method using the same, wherein the wet oxidation treatment system comprises: the reaction tank body is internally provided with a reaction cavity and a stirring device; the heating device is used for heating the reaction cavity; the gas-liquid separation device is connected with the discharge port of the reaction tank body; the initiator feeding device is connected with the reaction tank body through a feeding pipeline and further comprises an initiator storage tank and a preheater; the oxygen generating device is communicated with the reaction tank body through an oxygen pipeline and comprises an air compressor, a buffer tank, a booster pump and a gas steel bottle; and the micro-interface generator is arranged in the reaction cavity and used for crushing the gas from the oxygen pipeline into bubbles so that the bubbles and the industrial wastewater form gas-liquid emulsion, thereby increasing the interfacial area of the gas and the liquid, further accelerating the reaction rate and reducing the reaction pressure.
Description
Technical Field
The present invention relates generally to the field of water treatment technology, and more particularly to a wet oxidation treatment system for industrial wastewater and a method thereof.
Background
The wet oxidation method is one of high grade oxidation methods, i.e. air or oxygen is used as oxidant, in liquid phase system, macromolecular organic matter in waste water is oxidized and decomposed into micromolecular organic matter, carbon dioxide, water and other micromolecular inorganic matter, thereby achieving the purpose of evolution. At present, the existing wet oxidation technology has the problems of poor safety of a reaction device and high reaction energy consumption due to overhigh reaction pressure in the practical application process, and therefore, a wet oxidation treatment system for industrial wastewater and a method thereof are needed to at least partially solve the problems.
Disclosure of Invention
In this summary, concepts in a simplified form are introduced that are further described in the detailed description. This summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
To at least partially solve the above technical problem, in one aspect, the present invention provides a wet oxidation treatment system for industrial wastewater, comprising:
the reaction tank body is internally provided with a reaction cavity, and a stirring device is arranged in the reaction cavity;
the heating device heats the reaction cavity in a heat exchange mode with the reaction cavity;
the gas-liquid separation device is connected with the discharge hole of the reaction tank body;
the initiator adding device is connected with the reaction tank body through a feeding pipeline and comprises an initiator storage tank and a preheater;
the oxygen generating device is communicated with the reaction tank body through an oxygen pipeline and comprises an air compressor, a buffer tank, a booster pump and a gas steel bottle; and
the micro-interface generator is arranged in the reaction tank body;
the control module comprises a controller and a detection control element, and the controller is electrically connected with the detection control element;
wherein, the micro-interface generator is arranged in the reaction cavity and used for breaking the gas from the oxygen pipeline into bubbles so that the bubbles and the industrial wastewater form gas-liquid emulsion, thereby increasing the interfacial area of the gas and the liquid.
Optionally, the detection control element includes:
the first flow pump is arranged on a pipeline connected with the liquid inlet so as to detect the flow of the industrial wastewater entering the tank body in real time;
the second flow pump is arranged on a pipeline connected with the air inlet so as to detect the flow of the oxygen entering the tank body in real time;
the first pressure detection element is arranged in the micro-interface generator so as to measure a real-time pressure value in the micro-interface generator; and
a second pressure sensing element disposed within the tank body to measure a real-time pressure value within the tank body.
Optionally, a pressure transmitter electrically connected with the air compressor is arranged on the oxygen buffer tank.
Optionally, the micro-interface generator is a pneumatic micro-interface generator, a hydraulic micro-interface generator or a gas-liquid linkage micro-interface generator.
Optionally, the diameter of the bubble is greater than or equal to 1 μm and less than 1 mm.
In another aspect, the present invention provides a wet oxidation treatment method for industrial wastewater, comprising:
adding a certain amount of industrial wastewater and/or catalyst into the reaction cavity, and continuously stirring by a stirring shaft;
introducing high-pressure oxygen or air into a reaction cavity, heating a reaction tank body, simultaneously smashing gas introduced into the reaction cavity into bubbles by a micro-interface generator, dissolving the bubbles in the industrial wastewater to form a gas-liquid emulsion in the reaction cavity, carrying out a wet oxidation reaction on the gas-liquid emulsion under the action of the catalyst, discharging a high-temperature gas-liquid mixture generated in the reaction process through a discharge pipe, and cooling through a cooler;
and introducing the cooled gas-liquid mixture into a gas-liquid separation device for gas-liquid separation, discharging the separated gas from a gas outlet pipeline of the gas-liquid separator, collecting the gas after passing through a pressure reduction device, and discharging the liquid through a liquid outlet pipeline of the gas-liquid separator.
Optionally, the working temperature of the reaction tank body is 190-.
Optionally, before the wet oxidation reaction occurs, an initiator is further added into the reaction chamber, and the initiator is a hydrogen peroxide solution or a sodium hypochlorite solution.
Optionally, the initiator is preheated by a preheater and then put into the reaction chamber, and the working temperature of the preheater is 10-40 ℃.
Optionally, the rotation speed of the stirring shaft is 100-.
In some embodiments of the present invention, the micro-interface generator can break up bubbles into micron-sized bubbles, thereby increasing the phase interface area between the gas phase and the liquid phase, and further achieving the effect of enhancing mass transfer within a lower preset operating condition range; meanwhile, the micron-sized bubbles can be fully mixed with the raw materials to form a gas-liquid emulsion, so that the reaction efficiency is improved; on the other hand, as the gas is dissolved in the liquid, the reaction device does not need to maintain larger pressure to carry out the reaction, thereby improving the safety of the device and saving the energy consumption.
Drawings
In order that the advantages of the invention will be readily understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings. Understanding that these drawings depict only typical embodiments of the invention and are not therefore to be considered to be limiting of its scope, the invention will be described and explained with additional specificity and detail through the use of the accompanying drawings.
Fig. 1 is a schematic view of a wet oxidation treatment system for industrial wastewater according to the present invention.
Description of reference numerals:
1: the reaction tank body 101: reaction chamber
102: the first explosion venting device 2: oxygen-generating device
201: oxygen pipeline 202: oxygen booster pump
203: the air compressor 204: gas steel cylinder
205: first pipe 206: second pipeline
207: the buffer tank 208: second explosion venting device
209: and (3) a pressure transmitter: heating device
4: gas-liquid separation device 401: discharge pipe
402: gas-liquid separator 403: cooling device
5: micro-interface generator 6: cooling water inlet
7: cooling water outlet 8: stirring shaft
801: the rotating electric machine 9: initiator feeding device
901: a charging pipe 902: initiator storage tank
903: plunger type metering pump 904: preheater
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that embodiments of the invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in detail so as not to obscure the embodiments of the invention.
In the following description, a detailed structure will be presented for a thorough understanding of embodiments of the invention. It is apparent that the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art. The following detailed description of preferred embodiments of the invention, however, the invention is capable of other embodiments in addition to those detailed.
According to fig. 1, the wet oxidation treatment system for industrial wastewater comprises a reaction tank body 1 provided with a reaction chamber 101, wherein the top of the reaction chamber 101 is provided with a feed inlet and a discharge outlet (not shown in the figure), the feed inlet in the embodiment can be opened and closed for feeding industrial wastewater into the reaction chamber 101, and the discharge outlet is used for allowing high-temperature gas-liquid solution to flow out. The reaction chamber 101 is connected with the oxygen production device 2 through an oxygen pipeline 201. The system also comprises a heating device 3 and a gas-liquid separation device 4, wherein the heating device 3 heats the reaction cavity 101 by exchanging heat with the reaction cavity 101, and the heating device 3 can be an electric heating furnace; the gas-liquid separation device 4 includes a discharge pipe 401 connected to one end thereof with the discharge port and a gas-liquid separator 402 connected to the other end thereof. In the structure, the whole reaction tank body 1 is cylindrical, the reaction cavity 101 is further provided with the first explosion venting device 102, and the cooling water inlet 6 and the cooling water outlet 7 are further arranged on the top of the reaction cavity 101 for the convenience of rapidly reacting. In order to improve the reaction effect, a stirring shaft 8 extending to the bottom of the reaction chamber 101 is further arranged at the top of the reaction chamber 101, and the stirring shaft 8 is driven by a rotating motor 801.
Wherein, the reaction chamber 101 is also provided with a micro-interface generator 5, the micro-interface generator 5 is arranged near the gas inlet connected with the oxygen gas inlet pipe 201 and is used for breaking the gas from the oxygen gas pipe 201 into bubbles, the diameter of the bubbles is more than or equal to 1 μm and less than 1mm, and the bubbles and the industrial wastewater form gas-liquid emulsion, thereby increasing the phase interface area of the gas and the liquid. The micro-interface generator 5 can break the gas into micro-bubbles and/or micro-droplets with the diameter of micron level by one or more of a micro-pore ventilation method, a micro-channel method, a micro-fluidic method, a pressure field, a super-gravity field, an ultrasonic field, an electromagnetic field, an impinging stream breaking method, a rotary shearing breaking method, a spraying method or a gas-liquid mixed pump method, and forms a micro-fluidic interface system with other reaction phases.
Specifically, the oxygen generator 2 comprises an oxygen booster pump 202 communicated with one end of an oxygen pipeline 201, and an air compressor 203 and a gas steel cylinder 204 respectively communicated with the oxygen booster pump 202; further, the air compressor 203 is communicated with the oxygen booster pump 202 through a first pipeline 205, and the gas cylinder 204 is communicated with the oxygen booster pump 202 through a second pipeline 206; in order to buffer the pressure in the oxygen pipeline 201, in this embodiment, a buffer tank 207 is further disposed on the oxygen pipeline 2, and a second explosion venting device 208 is disposed on the buffer tank to ensure the safety of the apparatus.
In some embodiments of the present invention, a pressure transmitter 209 is further provided, and the pressure transmitter 209 is electrically connected to the air compressor 203 for feeding back the pressure in the oxygen pipeline 201 to the air compressor 203.
In some embodiments of the present invention, a cooler 403 is further disposed on the discharge pipe 401 between the reaction chamber 101 and the gas-liquid separation device 4, and the cooler 403 may be a coil heat exchanger in the prior art.
In order to improve the effect of wet oxidation, the invention is also provided with an initiator adding device 9, the initiator adding device 9 is connected with the reaction cavity 101 through a adding pipeline 901, and the initiator adding device 9 further comprises an initiator storage tank 902, a plunger type metering pump 903 and a preheater 904; in this embodiment, the frequency of the plunger type metering pump 903 is 50Hz, and the initiator adding device 9 can add the initiator into the reaction chamber 101 according to actual needs.
In some embodiments of the present invention, the reaction chamber 101 may be made of hastelloy C276 for increasing the corrosion resistance and high temperature resistance of the reaction chamber 101, although other components in this embodiment may be made of this material.
It will be understood by those skilled in the art that in all embodiments of the present invention, the pipes described in each embodiment may be provided with valves, including back pressure valves, ball valves, drain valves, control valves, and other valves according to actual production needs.
According to the illustration in fig. 1, the invention also provides a treatment method for wet oxidation of industrial wastewater, which comprises the following steps:
adding a certain amount of industrial wastewater and/or catalyst into the reaction chamber 101, and continuously stirring by the stirring shaft 8;
introducing high-pressure oxygen or air into the reaction cavity 101, heating the reaction tank body 1, simultaneously smashing the gas introduced into the reaction cavity 101 into bubbles by the micro-interface generator 5, dissolving the bubbles in industrial wastewater to form a gas-liquid emulsion in the reaction cavity 101, carrying out a wet oxidation reaction on the gas-liquid emulsion under the action of a catalyst, discharging a high-temperature gas-liquid mixture generated in the reaction process through a discharge pipe 401, and cooling through a cooler 403;
and (3) introducing the gas-liquid mixture after temperature reduction into a gas-liquid separator 402 for gas-liquid separation, discharging the separated gas from a gas outlet pipeline of the gas-liquid separator 402, collecting the gas after passing through a pressure reduction device, and discharging the liquid through a liquid outlet pipeline of the gas-liquid separator.
Wherein the working temperature of the reaction chamber 101 is 190-; the initiator added into the reaction chamber 101 is hydrogen peroxide solution or sodium hypochlorite solution; preheating an initiator by a preheater 904, and then feeding the initiator into the reaction cavity 101, wherein the working temperature of the preheater 904 is 10-40 ℃; the rotating speed of the stirring shaft 8 is 100-500 r/min.
In some embodiments of the invention, the detection control element comprises:
the first flow pump is arranged on a pipeline connected with the liquid inlet 41 so as to detect the flow of the industrial wastewater entering the tank body 1 in real time;
the second flow pump is arranged on a pipeline connected with the air inlet 31 so as to detect the flow of the oxygen entering the tank body 1 in real time;
a first pressure detection element disposed within the micro-interface generator 51 to measure a real-time pressure value within the micro-interface generator 51; and
and the second pressure detection element is arranged in the tank body 1 so as to measure the real-time pressure value in the tank body 1.
In some embodiments of the present invention, the controller receives the industrial wastewater flow rate of the first flow pump and the oxygen flow rate of the second flow pump, respectively, the controller sets a reference pressure P0, an oxygen reference flow rate Q10, and an industrial wastewater reference flow rate Q20 in the micro-interface generator 51, determines the industrial wastewater reference flow rate by comparing a real-time pressure value P in the micro-interface generator 51 with the reference pressure P0, and adjusts the first flow pump to make the real-time detected oxygen flow rate Q1 consistent with the oxygen reference flow rate Q10.
Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Terms such as "component" and the like, when used herein, can refer to either a single part or a combination of parts. Terms such as "mounted," "disposed," and the like, as used herein, may refer to one component as being directly attached to another component or one component as being attached to another component through intervening components. Features described herein in one embodiment may be applied to another embodiment, either alone or in combination with other features, unless the feature is otherwise inapplicable or otherwise stated in the other embodiment.
The present invention has been described in terms of the above embodiments, but it should be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the scope of the described embodiments. It will be appreciated by those skilled in the art that many variations and modifications may be made to the teachings of the invention, which fall within the scope of the invention as claimed.
Claims (10)
1. A wet oxidation treatment system for industrial wastewater, comprising:
the reaction tank body is internally provided with a reaction cavity, and a stirring device is arranged in the reaction cavity;
the heating device heats the reaction cavity in a heat exchange mode with the reaction cavity;
the gas-liquid separation device is connected with the discharge hole of the reaction tank body;
the initiator adding device is connected with the reaction tank body through a feeding pipeline and comprises an initiator storage tank and a preheater;
the oxygen generating device is communicated with the reaction tank body through an oxygen pipeline and comprises an air compressor, a buffer tank, a booster pump and a gas steel bottle;
the micro-interface generator is arranged in the reaction tank body; and
the control module comprises a controller and a detection control element, and the controller is electrically connected with the detection control element;
wherein, the micro-interface generator is arranged in the reaction cavity and used for breaking the gas from the oxygen pipeline into bubbles so that the bubbles and the industrial wastewater form gas-liquid emulsion, thereby increasing the interfacial area of the gas and the industrial wastewater.
2. The wet oxidation treatment system for industrial wastewater according to claim 1, wherein the detection control element comprises:
the first flow pump is arranged on a pipeline connected with the liquid inlet so as to detect the flow of the industrial wastewater entering the tank body in real time;
the second flow pump is arranged on a pipeline connected with the air inlet so as to detect the flow of the oxygen entering the tank body in real time;
the first pressure detection element is arranged in the micro-interface generator so as to measure a real-time pressure value in the micro-interface generator; and
a second pressure sensing element disposed within the tank body to measure a real-time pressure value within the tank body.
3. The wet oxidation treatment system for industrial wastewater according to claim 1, wherein the oxygen buffer tank is provided with a pressure transmitter electrically connected to the air compressor.
4. The wet oxidation treatment system for industrial wastewater according to claim 1, wherein the micro-interface generator is a pneumatic micro-interface generator, a hydraulic micro-interface generator, or a gas-liquid linkage micro-interface generator.
5. The wet oxidation treatment system for industrial wastewater according to claim 1, wherein the bubbles have a diameter of 1 μm or more and less than 1 mm.
6. A wet oxidation treatment method for industrial wastewater using the wet oxidation treatment system for industrial wastewater according to any one of claims 1 to 5, characterized in that the treatment method comprises:
adding a certain amount of industrial wastewater and/or catalyst into the reaction cavity, and continuously stirring by a stirring shaft;
introducing high-pressure oxygen or air into a reaction cavity, heating a reaction tank body, simultaneously smashing gas introduced into the reaction cavity into bubbles by a micro-interface generator, dissolving the bubbles in the industrial wastewater to form a gas-liquid emulsion in the reaction cavity, carrying out a wet oxidation reaction on the gas-liquid emulsion under the action of the catalyst, discharging a high-temperature gas-liquid mixture generated in the reaction process through a discharge pipe, and cooling through a cooler;
and introducing the cooled gas-liquid mixture into a gas-liquid separation device for gas-liquid separation, discharging the separated gas from a gas outlet pipeline of the gas-liquid separator, collecting the gas after passing through a pressure reduction device, and discharging the liquid through a liquid outlet pipeline of the gas-liquid separator.
7. The wet oxidation treatment method for industrial wastewater as claimed in claim 6, wherein the operating temperature of the reaction tank is 190 ℃ and 250 ℃, the operating pressure is 0.5-5MPa, and the reaction time is 1-1.5 h.
8. The wet oxidation treatment method for industrial wastewater according to claim 6, wherein an initiator is further added to the reaction chamber before the wet oxidation reaction, and the initiator is a hydrogen peroxide solution or a sodium hypochlorite solution.
9. The wet oxidation treatment method for industrial wastewater according to claim 8, wherein the initiator is preheated by a preheater and then fed into the reaction chamber, and the operating temperature of the preheater is 10 to 40 ℃.
10. The wet oxidation treatment method for industrial wastewater as claimed in claim 6, wherein the rotation speed of the stirring shaft is 100-500 r/min.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910859278.7A CN112479340A (en) | 2019-09-11 | 2019-09-11 | Wet oxidation treatment system and method for industrial wastewater |
| PCT/CN2019/120184 WO2021047045A1 (en) | 2019-09-11 | 2019-11-22 | Wet oxidation treatment system for industrial wastewater and method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910859278.7A CN112479340A (en) | 2019-09-11 | 2019-09-11 | Wet oxidation treatment system and method for industrial wastewater |
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| CN112479340A true CN112479340A (en) | 2021-03-12 |
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| WO (1) | WO2021047045A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112973602A (en) * | 2021-03-17 | 2021-06-18 | 徐州清流水环保科技有限公司 | Catalytic oxidation reaction kettle for producing polymeric ferric sulfate |
| CN113477189A (en) * | 2021-07-14 | 2021-10-08 | 南京延长反应技术研究院有限公司 | Automatic mixing system and method based on micro-interface mixing tank |
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| CN112973602A (en) * | 2021-03-17 | 2021-06-18 | 徐州清流水环保科技有限公司 | Catalytic oxidation reaction kettle for producing polymeric ferric sulfate |
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| CN113666563A (en) * | 2021-09-17 | 2021-11-19 | 南京万德斯环保科技股份有限公司 | Method for treating leachate of refuse landfill |
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