CN114751504A - Supercritical water oxidation heat recovery system - Google Patents
Supercritical water oxidation heat recovery system Download PDFInfo
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- CN114751504A CN114751504A CN202210319991.4A CN202210319991A CN114751504A CN 114751504 A CN114751504 A CN 114751504A CN 202210319991 A CN202210319991 A CN 202210319991A CN 114751504 A CN114751504 A CN 114751504A
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- 238000011084 recovery Methods 0.000 title claims abstract description 33
- 238000009284 supercritical water oxidation Methods 0.000 title claims abstract description 26
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 102
- 230000003647 oxidation Effects 0.000 claims abstract description 69
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 238000006243 chemical reaction Methods 0.000 claims abstract description 25
- 239000007800 oxidant agent Substances 0.000 claims abstract description 20
- 230000001590 oxidative effect Effects 0.000 claims abstract description 20
- 239000002994 raw material Substances 0.000 claims abstract description 19
- 239000002351 wastewater Substances 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims description 38
- 238000001514 detection method Methods 0.000 claims description 13
- 238000002347 injection Methods 0.000 claims description 13
- 239000007924 injection Substances 0.000 claims description 13
- 239000007787 solid Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 description 15
- 239000007789 gas Substances 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- 239000012071 phase Substances 0.000 description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 4
- 238000005485 electric heating Methods 0.000 description 4
- 231100000252 nontoxic Toxicity 0.000 description 4
- 230000003000 nontoxic effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- KFSLWBXXFJQRDL-UHFFFAOYSA-N Peracetic acid Chemical compound CC(=O)OO KFSLWBXXFJQRDL-UHFFFAOYSA-N 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910017053 inorganic salt Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
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- 239000000446 fuel Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000012454 non-polar solvent Substances 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000005501 phase interface Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
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- 238000004064 recycling Methods 0.000 description 1
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- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000009279 wet oxidation reaction Methods 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
-
- 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
- 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
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
-
- 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
- C02F2303/00—Specific treatment goals
- C02F2303/10—Energy recovery
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The application relates to a supercritical water oxidation energy recovery system, which relates to the technical field of supercritical water oxidation equipment, and comprises a raw material input system, an oxidation reaction system, a power supply system and an energy recovery system; the raw material input system comprises a waste water tank, an oxidant tank and a water pump, wherein a feed inlet of the water pump is communicated with the waste water tank and the oxidant tank; the oxidation reaction system comprises an oxidation reactor and an auxiliary power device, wherein an outlet of the auxiliary power device is communicated with a feeding hole of the oxidation reactor; the power supply system is used for supplying electric energy to the raw material input system and the oxidation reaction system; the energy recovery system comprises a heat exchanger and a thermoelectric conversion device, wherein one branch of the heat exchanger is connected to the discharge hole of the oxidation reactor, and the other branch of the heat exchanger is connected to the thermoelectric conversion device and used for providing heat energy for a power supply system to generate electric energy. The method has the effect of improving the energy utilization rate of the oxidation reaction system.
Description
Technical Field
The application relates to the technical field of supercritical water oxidation equipment, in particular to a supercritical water oxidation heat recovery system.
Background
The treatment of high-concentration (chemical oxygen demand COD is more than 2000mg/L), toxic and non-degradable organic wastewater is a well-known technical problem at home and abroad. The traditional organic wastewater treatment technology (such as physical and chemical treatment technology, biological treatment technology, wet oxidation, incineration and the like) has the problems of high cost, low degradation rate, easy derivation of secondary pollution and the like. Supercritical Water Oxidation (SCWO), as a novel organic wastewater treatment technology, is one of the methods for effectively solving this problem.
Supercritical water oxidation is a method of oxidizing organic substances by "burning" with air or another oxidizing agent under high-temperature and high-pressure conditions exceeding the critical point of water (PC: 22.1MPa, TC: 374 ℃). The polarity of water is a function of temperature and pressure, and supercritical water is a non-polar solvent. Under the environment of supercritical water, organic matters and gas can be completely dissolved mutually, the phase interface of gas phase and liquid phase disappears, a homogeneous phase system is formed, and the reaction speed is greatly accelerated. Over 99.9% of the organics are rapidly combusted to CO in a residence time of less than 1 minute or even a few seconds2、H2O and other non-toxic and harmless end products. The reaction temperature is generally 400 ℃ and 650 ℃, SO is avoided2Secondary pollutants such as NOx and dioxin. The whole combustion oxidation process generates a large amount of heat and has a large heat recovery potential. However, the high-temperature and high-pressure reaction conditions for supercritical water oxidation require a large amount of heat. Therefore, how to effectively recoverThe key of the application and popularization of the technology is to reduce the energy consumption of the system by the heat of the fluid and even realize the self-sufficiency of the heat of the system.
Disclosure of Invention
In order to solve the technical problem, the application provides a supercritical water oxidation heat recovery system.
The application provides a supercritical water oxidation heat recovery system adopts following technical scheme:
the supercritical water oxidation energy recovery system comprises a raw material input system, an oxidation reaction system, a power supply system and an energy recovery system;
the raw material input system comprises a waste water tank, an oxidant tank and a water pump, wherein a feed inlet of the water pump is communicated with the waste water tank and the oxidant tank;
the oxidation reaction system comprises an oxidation reactor and an auxiliary power device, wherein an outlet of the auxiliary power device is communicated with a feed inlet of the oxidation reactor;
the power supply system is used for supplying electric energy to the raw material input system and the oxidation reaction system;
the energy recovery system comprises a heat exchanger and a thermoelectric conversion device, wherein one branch of the heat exchanger is connected to the discharge hole of the oxidation reactor, and the other branch of the heat exchanger is connected to the thermoelectric conversion device and used for providing heat energy for a power supply system to generate electric energy.
By adopting the technical scheme, the raw material input system sends the wastewater with organic matters and the oxidant into the oxidation reaction system, water is in a supercritical state through high temperature and high pressure, the organic matters are subjected to combustion oxidation, the generated nontoxic and harmless products are discharged from the oxidation reactor, as the organic matters can release a large amount of heat in the oxidation process, the nontoxic and harmless products discharged from the oxidation reactor can also carry a large amount of heat, after passing through the heat exchanger, the heat can be transferred to the thermoelectric conversion device connected with the heat exchanger, the heat energy can be converted into electric energy through the thermoelectric conversion device to be used for providing electric power for the power supply system, and the recycling of redundant energy is realized.
Optionally, the auxiliary power device comprises a circulating injection pump and an air compressor, an air inlet of the circulating injection pump is connected to a discharge hole of the oxidation reactor, another air inlet of the circulating injection pump is connected to the air compressor, and an air outlet of the circulating injection pump is connected to a feed inlet of the oxidation reactor.
Through adopting above-mentioned technical scheme, the circulation jet pump can shunt oxidation reactor spun material to send oxidation reactor spun material into again under the effect of air compressor machine and form the circulation in the oxidation reactor, increase and keep oxidation reaction's supercritical pressure, make supercritical water oxidation reaction normally stably go on.
Optionally, the energy recovery system further comprises a steam generator, and a turbine is connected to an air outlet of the steam generator and used as a power source of the air compressor.
Through adopting above-mentioned technical scheme, oxidation reactor spun waste liquid is partly can produce high-pressure steam through steam generator, and high-pressure steam spouts output to the turbine on, produces power, and the turbine drives air compressor machine work operation, further reduces power consumption, improves the utilization ratio of the surplus energy of supercritical water oxidation process.
Optionally, the air outlet of the steam generator is connected with a high-pressure gas-liquid separator, the air outlet of the high-pressure gas-liquid separator is connected to the air inlet of the turbine, and the liquid outlet of the high-pressure gas-liquid separator is connected with a pressure reducing device.
Through adopting above-mentioned technical scheme, high-pressure gas-liquid separator can be with the gas-liquid separation in the steam generator spun high-pressure steam, mostly nitrogen gas and carbon dioxide in the high-pressure gas to connecting the turbine and driving the work of air compressor machine with producing power, high-pressure liquid turns into the water purification and discharges.
Optionally, the pressure reducing device comprises a pressure reducing valve or a back pressure valve.
Optionally, the output end of the oxidation reactor is connected with a solid separator, and a discharge port of the solid separator is connected to an air inlet of the circulating jet pump and an air inlet of the steam generator; the water outlet of the pressure reducing device is connected to the water inlet of the steam generator.
By adopting the technical scheme, inorganic salt and other substances can be generated in a single phase of the waste liquid sprayed out of the oxidation reactor, and the solid separator can precipitate and separate the inorganic salt and other substances in the waste liquid, so that the blockage generated in the subsequent process steps is reduced.
Optionally, the power supply system includes a storage battery and a control circuit, and the storage battery is used for providing electric energy for electric equipment in the raw material input system and the oxidation reaction system; the control circuit is used for connecting or disconnecting the electric connection between the mains supply and the storage battery and between the storage battery and each electric device.
By adopting the technical scheme, when the supercritical water oxidation process starts, the power supply system is connected with the commercial power, supplies electric energy to the raw material input system and the oxidation reaction system, and charges the storage battery; the control circuit can cut off or connect the connection between the storage battery and the commercial power according to the requirement so as to save the cost of electric energy.
Optionally, a temperature detection device is arranged in the oxidation reactor, a signal output end of the temperature detection device is electrically connected to the control circuit, and when the temperature in the oxidation reactor meets the requirement, the temperature detection device sends a control signal to the control circuit to break the mains supply.
By adopting the technical scheme, the temperature detection device can detect the temperature in the oxidation reactor in real time, when the temperature in the oxidation reactor reaches a supercritical state, the temperature in the oxidation reactor can be maintained within a certain range through the oxidation of organic matters, so that the heat applied by the outside can be reduced, a control signal is sent to the control circuit to disconnect the commercial power, and the electric energy is provided for the operation of a system through the storage battery and the thermoelectric conversion device.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the heat exchanger can absorb heat from the waste liquid discharged from the oxidation reaction system and transfer the heat to the thermoelectric conversion device, so that the electric energy can be supplemented to the storage battery through the thermoelectric conversion device, the consumption of commercial power is reduced, and the utilization rate of the heat energy generated by the system is improved.
2. A steam generator in the energy recovery system can form high-pressure steam from a part of waste liquid sprayed out of the oxidation reactor, and the high-pressure steam provides power for the air compressor through a turbine, so that the utilization rate of system energy is further improved.
3. The temperature detection device in the oxidation reactor can detect the temperature in the oxidation reactor in real time, when the temperature in the oxidation reactor reaches a supercritical state, the temperature in the oxidation reactor can be maintained within a certain range through the oxidation of organic matters, so that the heat applied from the outside can be reduced, a control signal is sent to the control circuit to disconnect the commercial power, and the electric energy is provided for the operation of a system through the storage battery and the thermoelectric conversion device.
Drawings
Fig. 1 is a system block diagram provided in an embodiment of the present application.
Reference numerals: 11. a waste water tank; 12. an oxidant tank; 13. a water pump; 21. an oxidation reactor; 22. a circulating jet pump; 23. an air compressor; 24. a solids separator; 25. an electric heater; 31. a storage battery; 41. a heat exchanger; 42. a thermoelectric conversion device; 43. a steam generator; 44. a turbine; 45. a high pressure gas-liquid separator; 46. a pressure reducing device; 47. a low pressure gas-liquid separator; 5. a temperature detection device.
Detailed Description
The technical solutions in the present application will be described in further detail below with reference to the accompanying drawings.
The embodiment of the application discloses supercritical water oxidation energy recovery system. Referring to fig. 1, the system includes a raw material input system, an oxidation reaction system, a power supply system, and an energy recovery system.
Wherein, raw materials input system includes waste water jar 11, oxidant jar 12 and water pump 13, and the feed inlet of water pump 13 is connected with waste water jar 11 and oxidant jar 12. The waste water tank 11 is used for gathering or storing machine waste water, the oxidant tank 12 is used for storing an oxidant, wherein the oxidant can be hydrogen peroxide, peroxyacetic acid, concentrated nitric acid, concentrated sulfuric acid and the like, and the organic waste water in the waste water tank 11 and the oxidant in the oxidant tank 12 can be pumped out and mixed at the same time through the pumping action of the water pump 13, and are conveyed to an oxidation reaction system for oxidation reaction.
The oxidation reaction system comprises an oxidation reactor 21, an electric heating device and an auxiliary power device, wherein an outlet of the auxiliary power device is communicated with a feed inlet of the oxidation reactor 21 and is used for supplementing gas in the oxidation reactor 21. Wherein, the electric heating device is used for heating the mixture of the wastewater and the oxidant ejected by the water pump 13 to a supercritical temperature state, and the electric heating device can be arranged inside the oxidation reactor 21; the auxiliary power device comprises a circulating injection pump 22 and an air compressor 23, wherein one air inlet hole of the circulating injection pump 22 is connected to the discharge hole of the oxidation reactor 21 through a heat exchanger 41, the other air inlet hole of the circulating injection pump 22 is connected to the air outlet hole of the air compressor 23, and the air outlet hole of the circulating injection pump 22 is connected to the feed inlet of the oxidation reactor 21.
After the oxidation reactor 21 sprays the waste liquid, a part of the waste liquid can enter the circulating injection pump 22, and the substances sprayed out of the oxidation reactor 21 are sent into the oxidation reactor 21 again under the action of the air compressor 23 to form circulation, so that the supercritical pressure of the oxidation reaction is increased and maintained, and meanwhile, the gas in the oxidation reactor 21 is supplemented, so that the inside of the oxidation reactor is in a uniform phase, and the supercritical water oxidation reaction is normally and stably carried out; and the other part of the waste liquid sprayed out of the oxidation reactor 21 enters an energy recovery system to fully utilize the residual energy to provide power for the operation of the system.
The power supply system comprises a storage battery 31 and a control circuit (not shown in the drawing) for controlling the connection or disconnection of the commercial power and the storage battery 31 and controlling the connection or disconnection of the storage battery 31 and the electric equipment in the oxidation reaction system and the raw material input system; the battery 31 is used for storing electric energy and supplying electric energy to electric devices in the oxidation reaction system and the raw material input system. When the oxidation reaction system is in a state of stopping operation, the commercial power is connected with the storage battery 31, and the storage battery 31 is charged; when the oxidation reaction system is started, the storage battery 31 supplies electric energy to the raw material input system and electric equipment in the oxidation reaction system, such as the water pump 13, the electric heater 25 and the like, so that the oxidation reaction system enters an operation state, the organic wastewater and the oxidant in the oxidation reactor 21 release a large amount of heat during the reaction process, the temperature in the oxidation reactor 21 is maintained in a supercritical single-phase state, the waste liquid discharged from the oxidation reactor 21 carries the heat away, and converts the heat energy into electric energy again through the energy recovery system and transmits the electric energy to the storage battery 31, thus reducing or eliminating the dependence on the commercial power, when the electric quantity output by the energy recovery system can meet the requirement, the connection between the storage battery 31 and the commercial power can be disconnected through the control circuit, so that the consumption of the commercial power energy by the high oxidation reaction system is reduced, and the utilization rate of the residual energy in the oxidation reaction is improved.
The energy recovery system comprises a heat exchanger 41 and a thermoelectric conversion device 42, wherein one branch of the heat exchanger 41 is connected to the discharge hole of the oxidation reactor 21, the other branch of the heat exchanger 41 is connected to the thermoelectric conversion device 42, after waste liquid with heat in the oxidation reactor 21 is discharged, the heat can be transferred to the thermoelectric conversion device 42 through the heat exchanger 41, and the thermoelectric conversion device 42 generates electric energy by heating, so that the electric energy is provided for the storage battery 31, and the recovery and the utilization of the redundant heat can be realized.
Further, the energy recovery system further comprises a steam generator 43, a turbine 44 is connected to an air outlet of the steam generator 43, and the turbine 44 is used as a power source of the air compressor 23. Wherein, the furnace of the steam generator 43 can be heated by burning fuel, and can also be electrically connected with a power supply system to realize electric heating, so as to generate high-pressure steam and output the high-pressure steam to the turbine 44; the turbine 44 can be a steam turbine or a water turbine, the high-pressure steam sprayed from the steam generator 43 drives the turbine 44 to rotate, and the turbine 44 can replace a power supply to drive the air compressor 23 to operate, so that the utilization rate of the residual energy in the supercritical water oxidation process is further improved.
Further, a high-pressure gas-liquid separator 45 is connected to an outlet of the steam generator 43, an outlet of the high-pressure gas-liquid separator 45 is connected to an inlet of the turbine 44, and a pressure reducing device 46 is connected to a liquid outlet of the high-pressure gas-liquid separator 45. Wherein, pressure relief device 46 can be back pressure valve or relief pressure valve, be used for reducing high-pressure gas-liquid separator 45 spun clean water pressure, pressure relief device 46's exit still is connected with low-pressure gas-liquid separator 47, be used for the clean water and the gas of further separation pressure relief device 46 output, high-pressure gas-liquid separator 45 and the gas of low-pressure gas-liquid separator 47 combustion gas are mostly nitrogen gas and carbon dioxide, no pollution to air circumstance, steam generator 43 can be poured into again to low-pressure gas-liquid separator 47 exhaust clean water, reduce the use of outside water resource, the utilization ratio of water resource is improved.
The output end of the oxidation reactor 21 is connected with a solid separator 24, and the discharge port of the solid separator 24 is connected to the air inlet of the circulation jet pump 22 and the air inlet of the steam generator 43. Inorganic salts and other substances can be generated in a single phase of the waste liquid sprayed from the oxidation reactor 21, and the solid separator 24 can be used for precipitating and separating inorganic salts and other solid substances in the waste liquid, so that the blockage generated in the subsequent process steps is reduced.
Furthermore, a temperature detection device 5 is disposed in the oxidation reactor 21, and a signal output end of the temperature detection device 5 is electrically connected to the control circuit. The temperature detection device 5 can be an infrared temperature detector or a radiation thermometer, the upper limit of the measurement range can reach 1500-2000 ℃, and the measurement of the combustion temperature of the water oxidation reaction can be met. When the temperature in the oxidation reactor 21 reaches the requirement of the oxidation reaction, the temperature detection device 5 sends a control signal to the control circuit to cut off the commercial power. The temperature detecting device 5 can detect the temperature in the oxidation reactor 21 in real time, and when the temperature in the oxidation reactor 21 reaches a supercritical state, the temperature in the oxidation reactor 21 can be maintained within a certain range through the oxidation of organic matters, so that the heat applied from the outside can be reduced, a control signal is sent to the control circuit to disconnect the commercial power, and the electric energy is provided for the operation of the system through the storage battery 31 and the thermoelectric conversion device 42.
The implementation principle of the embodiment of the application is as follows: the raw material input system sends the mixture of the waste water with organic matters and the oxidant to an oxidation reaction system, the mixture of the waste water and the oxidant generates high temperature and high pressure in an oxidation reactor 21 through the action of an electric heater 25 and an air compressor 23, even if water vapor is in a supercritical single-phase state, the organic matters are subjected to 'combustion' oxidation, the generated nontoxic and harmless waste liquid carries a large amount of heat to be discharged from the oxidation reactor 21, the high-temperature waste liquid can transfer the heat to a thermoelectric conversion device 42 connected with the heat exchanger 41 after passing through the heat exchanger 41, and the thermoelectric conversion device 42 can convert the heat energy into electric energy for providing power for a power supply system, so that the recovery and the utilization of redundant energy are realized; meanwhile, after the waste liquid output by the oxidation reactor 21 passes through the steam generator 43 and the high-pressure gas-liquid separator 45, the generated high-pressure gas can drive the air compressor 23 to operate under the action of the turbine 44, so that the consumption of electric energy of the mains supply is further reduced, and the effect of fully utilizing the residual energy generated by the water oxidation reaction is achieved.
The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. Supercritical water oxidation energy recuperation system, its characterized in that: comprises a raw material input system, an oxidation reaction system, a power supply system and an energy recovery system;
the raw material input system comprises a waste water tank (11), an oxidant tank (12) and a water pump (13), wherein a feed inlet of the water pump (13) is communicated with the waste water tank (11) and the oxidant tank (12);
the oxidation reaction system comprises an oxidation reactor (21) and an auxiliary power device, wherein an outlet of the auxiliary power device is communicated with a feeding hole of the oxidation reactor (21);
the power supply system is used for supplying electric energy to the raw material input system and the oxidation reaction system;
the energy recovery system comprises a heat exchanger (41) and a thermoelectric conversion device (42), wherein one branch of the heat exchanger (41) is connected to the discharge port of the oxidation reactor (21), and the other branch of the heat exchanger (41) is connected to the thermoelectric conversion device (42) and is used for providing heat energy for a power supply system to generate electric energy.
2. The supercritical water oxidation heat recovery system of claim 1 wherein: the auxiliary power device comprises a circulating injection pump (22) and an air compressor (23), wherein an air inlet hole of the circulating injection pump (22) is connected to a discharge hole of the oxidation reactor (21), another air inlet hole of the circulating injection pump (22) is connected to the air compressor (23), and an air outlet hole of the circulating injection pump (22) is connected to a feed inlet of the oxidation reactor (21).
3. The supercritical water oxidation heat recovery system of claim 1, characterized in that: the energy recovery system further comprises a steam generator (43), a turbine (44) is connected to an air outlet of the steam generator (43), and the turbine (44) is used as a power source of the air compressor (23).
4. The supercritical water oxidation heat recovery system of claim 3, characterized in that: the venthole of steam generator (43) is connected with high pressure vapour and liquid separator (45), the venthole of high pressure vapour and liquid separator (45) is connected to the inlet port of turbine (44), the play liquid hole of high pressure vapour and liquid separator (45) is connected with pressure relief device (46).
5. The supercritical water oxidation heat recovery system of claim 4, characterized in that: the pressure reducing device (46) comprises a pressure reducing valve or a back pressure valve.
6. The supercritical water oxidation heat recovery system of claim 4, characterized in that: the output end of the oxidation reactor (21) is connected with a solid separator (24), and the discharge hole of the solid separator (24) is connected with the air inlet hole of the circulating jet pump (22) and the air inlet hole of the steam generator (43); the water outlet of the pressure reducing device (46) is connected to the water inlet of the steam generator (43).
7. The supercritical water oxidation heat recovery system of claim 1, characterized in that: the power supply system comprises a storage battery (31) and a control circuit, wherein the storage battery (31) is used for supplying electric energy to electric equipment in the raw material input system and the oxidation reaction system; the control circuit is used for connecting or disconnecting the electric connection between the commercial power and the storage battery (31) and each electric device.
8. The supercritical water oxidation heat recovery system of claim 7, characterized in that: the oxidation reactor (21) is internally provided with a temperature detection device (5), the signal output end of the temperature detection device (5) is electrically connected to the control circuit, and when the temperature in the oxidation reactor (21) meets the requirement, the temperature detection device (5) sends a control signal to the control circuit to cut off the commercial power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210319991.4A CN114751504A (en) | 2022-03-29 | 2022-03-29 | Supercritical water oxidation heat recovery system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210319991.4A CN114751504A (en) | 2022-03-29 | 2022-03-29 | Supercritical water oxidation heat recovery system |
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| CN114751504A true CN114751504A (en) | 2022-07-15 |
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| CN202210319991.4A Pending CN114751504A (en) | 2022-03-29 | 2022-03-29 | Supercritical water oxidation heat recovery system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102503066A (en) * | 2011-12-23 | 2012-06-20 | 南京工业大学 | System and method for supercritical water oxidation treatment and resource utilization of organic sludge |
| CN207998481U (en) * | 2018-01-23 | 2018-10-23 | 陕西科技大学 | A kind of supercritical water oxidation treatment system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102503066A (en) * | 2011-12-23 | 2012-06-20 | 南京工业大学 | System and method for supercritical water oxidation treatment and resource utilization of organic sludge |
| CN207998481U (en) * | 2018-01-23 | 2018-10-23 | 陕西科技大学 | A kind of supercritical water oxidation treatment system |
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Application publication date: 20220715 |