CN115259341A - Supercritical water oxidation device for high-salinity wastewater treatment - Google Patents
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- 238000009284 supercritical water oxidation Methods 0.000 title claims abstract description 40
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 12
- 238000006243 chemical reaction Methods 0.000 claims abstract description 72
- 239000012530 fluid Substances 0.000 claims abstract description 40
- 238000000926 separation method Methods 0.000 claims abstract description 38
- 239000000919 ceramic Substances 0.000 claims abstract description 33
- 150000003839 salts Chemical class 0.000 claims abstract description 32
- 239000007800 oxidant agent Substances 0.000 claims abstract description 26
- 239000002351 wastewater Substances 0.000 claims abstract description 26
- 238000001816 cooling Methods 0.000 claims abstract description 23
- 230000001590 oxidative effect Effects 0.000 claims abstract description 23
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000005192 partition Methods 0.000 claims abstract description 3
- 238000004321 preservation Methods 0.000 claims abstract description 3
- 150000002978 peroxides Chemical class 0.000 claims description 11
- 238000005259 measurement Methods 0.000 claims description 5
- 239000002352 surface water Substances 0.000 claims description 3
- 230000014759 maintenance of location Effects 0.000 claims 1
- 238000000034 method Methods 0.000 description 25
- 230000003647 oxidation Effects 0.000 description 12
- 238000007254 oxidation reaction Methods 0.000 description 12
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000010815 organic waste Substances 0.000 description 2
- 208000036828 Device occlusion Diseases 0.000 description 1
- 238000010170 biological method Methods 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000001699 photocatalysis Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000009279 wet oxidation reaction Methods 0.000 description 1
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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
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/02—Temperature
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- Organic Chemistry (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention belongs to the field of high-salinity wastewater treatment, and provides a supercritical water oxidation device for high-salinity wastewater treatment. The main structure of the reaction system is a metal tube with a built-in ceramic tube, the metal tube is sequentially provided with a preheating zone, a reaction zone and a cooling zone from top to bottom, the metal tube corresponds to the non-porous zone, the porous zone and the non-porous zone of the ceramic tube respectively, a partition plate is arranged at the joint of the preheating zone and the reaction zone of the annular gap between the outer wall and the ceramic tube, the preheating zone is provided with an organic wastewater inlet, a preheating fluid inlet and a preheating fluid outlet, the reaction zone and the cooling zone are provided with a plurality of low-temperature oxidant inlets, the main structure of the separation system is also a metal cylinder with the built-in non-porous ceramic tube, the cooling end of the ceramic tube of the reaction system is obliquely inserted into the lower side in the ceramic tube of the separation system at a certain inclination angle, a declination guide plate is arranged at the lower side of the ceramic tube, the reaction system is connected with the outer side of the separation system through a flange, the upper end and the lower end of the separation system are respectively provided with a hot fluid product outlet and a precipitated salt outlet, the hot fluid outlet is connected with the preheating fluid inlet of the reaction system, the outer side of the reaction system and the separation system are sequentially provided with a heat preservation layer and an electromagnetic heating coil, and a control system, wherein the control system comprises a control cabinet, a circuit and various sensors. The device has the advantages of compact structure, safety, high efficiency, direct discharge of treated water and the like, and has wide application prospect.
Description
Technical Field
The invention belongs to the field of high-salinity wastewater treatment devices, and particularly relates to a supercritical water oxidation device for high-salinity wastewater treatment.
Background
Along with the development of economic society, a large amount of toxic and harmful organic wastes which are difficult to degrade are generated, and the natural environment and the body health of people are seriously harmed. The supercritical water oxidation technology (SCWO) provided at the earliest time by Modell of the university of science and technology of Massachusetts in the United states in the 20 th century and the 80 th century overcomes the defects of secondary pollution, long degradation period, incomplete degradation and the like caused by a traditional waste treatment method of incineration, a biological method, a wet oxidation method, an ultrasonic oxidation method, a photocatalytic oxidation method and the like, and is a novel efficient and environment-friendly organic waste treatment technology.
However, the material stress is reduced due to the overhigh supercritical water oxidation temperature, and the metal material is seriously corroded due to the contact of the metal material and the organic wastewater and the oxidant in the supercritical state; in a supercritical state, the solubility of precipitated salt is reduced to cause device blockage, so that the problem of corrosion and blockage becomes the key of the development of a supercritical water oxidation technology, and a patent CN11943349A provides a low-temperature gas film supercritical water oxidation device with a built-in porous ceramic tube, so that the isolation and cooling of a metal pressure bearing wall and a high-temperature reaction system are realized, and the corrosion of the pressure bearing wall and the requirements on materials are reduced; the patent CN104291546A provides a reaction-separation integrated supercritical water oxidation device, which removes a connecting pipeline between a reactor and a separator to reduce the corrosion prevention requirement of the device; patent CN109264914A provides a heat recovery supercritical water oxidation process, which improves the energy utilization efficiency of the device.
At present, the supercritical water oxidation device proposed by the existing patent does not realize the integrated integration of an energy recovery system and a reaction separation system and has the problems of high salt content of treated water, difficult device corrosion protection and incapability of directly discharging the treated water to the outside (the maximum salt content is 250mg/L specified by GB3838-2002 surface water environmental quality standard).
Disclosure of Invention
In order to solve the problems, the invention provides a supercritical water oxidation device for high-salinity wastewater treatment, which is characterized by comprising a reaction system (1), a separation system (2) and a control system (3), wherein the reaction system is connected with the separation system at a certain inclination angle alpha, the main structure of the reaction system is a metal pipe (1-1) with a built-in ceramic pipe, a preheating area (1-2), a reaction area (1-3) and a cooling area (1-4) are sequentially arranged from top to bottom and respectively correspond to a non-porous ceramic pipe (1-5), a porous ceramic pipe (1-6) and a non-porous ceramic pipe (1-7), a partition plate (1-8) is arranged between the outer wall of the joint of the preheating area (1-2) and the reaction area (1-3) and the ceramic pipe, and the preheating area (1-2) is provided with a high-salinity wastewater inlet (1-9), a preheating fluid inlet (1-10) and a preheating fluid outlet (1-11). A plurality of low-temperature oxidant inlets are arranged on two sides of the reaction zone (1-3) and the cooling zone (1-4): an oxidant inlet I (1-12-1), an oxidant inlet II (1-12-2), an oxidant inlet III (1-12-3), a main structure of the separation system is also a metal cylinder (2-2) with a built-in non-porous ceramic tube (2-1), a cooling end of the ceramic tube of the reaction system (1) is obliquely inserted into the lower side in the ceramic tube of the separation system (2) at a certain inclination angle, a downward inclined guide plate (2-3) is arranged at the lower side, the reaction system (1) is connected with the outer side of the separation system (2) through flanges (1-13), the upper end and the lower end of the separation system (2) are respectively provided with a hot fluid product outlet (2-4) and a precipitated salt outlet (2-5), the hot fluid product outlet (2-4) is connected with a reaction system preheating fluid inlet (1-10) through a backpressure valve (2-6) and a connecting pipeline, the reaction system (1) and the separation system (2) are sequentially provided with a heat preservation layer (3-1) and an electromagnetic heating coil (3-2) from inside to outside, the control system comprises a control cabinet (4-1), a measurement and control line (4-2) and various sensors (4-3), and the control cabinet (4-1) is connected with the various sensors (4-3) through the measurement and control line (4-2).
Furthermore, oxidant inlets I, II and III are distributed at intervals at two sides of the reaction zone to realize the full mixing and the rapid degradation of the high-salinity wastewater and the oxidant.
Further, the outlet temperature of the cooling zone (1-3) is 470-520 ℃.
Further, the guide plates (2-3) prevent the back mixing of the precipitated salt and the hot fluid product;
the invention has the advantages that:
the invention provides an energy recovery reaction and separation integrated supercritical water oxidation device, which is characterized in that connecting pipelines between a reactor and a separator, and between the reactor and the energy recovery device are removed, a ceramic tube is arranged in a reaction system, multi-section low-temperature oxidant injection is adopted, the temperature of an outlet of the reaction system is controlled to be 470-520 ℃, a guide plate and a non-porous ceramic tube in the separation system separate a metal wall and a product to reduce the corrosion of the metal wall, so that the salt content in water is lower than 250mg/L specified in GB3838-2002 surface water environment quality standard, and the direct discharge requirement is met.
Drawings
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings, in which:
FIG. 1 is a supercritical water oxidation apparatus for high salinity wastewater treatment;
in the figure, 1-reaction system; 1-1-a pressure-bearing wall of the reaction system; 1-2-a preheating zone; 1-3-a reaction zone; 1-4-a cooling zone; 1-5-non-porous ceramic tube; 1-6-porous ceramic tube; 1-7-non-porous ceramic tube; 1-8-spacer; 1-9-high salt wastewater inlet; 1-10-a preheated fluid inlet; 1-11-a preheated fluid outlet; 1-12-1-oxidant inlet i; 1-12-2-oxidant inlet ii; 1-12-3-oxidant inlet iii; 1-13-flange; 1-14-sealing structure; 2-a separation system; 2-1-a non-porous ceramic tube; 2-2-metal bearing wall; 2-3-a baffle; 2-4-hot fluid product outlet; 2-5-outlet for separated salt; 2-6-back pressure valve; 2-7-a deflector support frame; 3-a control system; 3-1-insulating layer; 3-2-electromagnetic heating coil; 4-1-control cabinet; 4-2-measurement and control line; 4-3-sensors; the included angle of the alpha-reaction system and the separation system; the included angle between the beta-guide plate and the imperforate ceramic tube of the separation system;
Detailed Description
The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.
Example 1
Supercritical water oxidation process: after the preheating process is stable, high-salt wastewater with COD 200000mg/L and TDS of 6% is introduced into a supercritical water oxidation device with pressure of 28MPa through a high-salt wastewater inlet (1-9), an electromagnetic heating coil (3-2) is utilized at the same time, the inlet temperature T2 of a reaction zone (1-3) is kept at 500 ℃, air with 25 ℃, 28MPa and 1.5 times of peroxide amount is introduced into oxidant inlets I, II, III (1-12-1, 1-12-2, 1-12-3), the residence time in the reaction system is 100s, the outlet temperature T3 of the cooling zone (1-4) is 480 ℃, the inclination included angle alpha of the reaction system (1) and a separation system (2) is 30 ℃, and the included angle beta of a flow guide plate (2-3) is 15 ℃, a gaseous product is discharged from the top of the device through a hot fluid product outlet (2-4) and enters a preheating fluid inlet (1-10) at the same time, precipitated salt is discharged from the bottom of the device through a precipitated salt outlet (2-5), the oxidation product is lower than 50mg/L, the TDS is lower than 250mg/L, and the TDS/L is lower than the direct discharge requirement.
Example 2
Supercritical water oxidation process: after the preheating process is stable, high-salt wastewater with COD of 200000mg/L and TDS of 6% is introduced into a supercritical water oxidation device with pressure of 26MPa through a high-salt wastewater inlet (1-9), meanwhile, an electromagnetic heating coil (3-2) is utilized, the inlet temperature T2 of a reaction zone (1-3) is kept to be 480 ℃, air with 25 ℃, 26MPa and 1.6 times of peroxide amount is passed through oxidant inlets I, II, III (1-12-1, 1-12-2, 1-12-3), the residence time in the reaction system is 60s, the outlet temperature T3 of the cooling zone (1-4) is 480 ℃, the inclined included angle alpha of the reaction system (1) and a separation system (2) is 45 degrees, the included angle beta of a flow guide plate (2-3) is 15 degrees, a gaseous product is discharged from the top of the device through a hot fluid product outlet (2-4) and simultaneously enters a preheating fluid inlet (1-10), precipitated salt is discharged from the bottom of the device through a precipitated salt outlet (2-5), the oxidation product reaches less than 50mg/L and the direct discharge/TDS is less than 250 mg/L.
Embodiment 3
Supercritical water oxidation process: after the preheating process is stable, high-salt wastewater with the COD of 200000mg/L and the TDS of 7% is introduced into a supercritical water oxidation device with the pressure of 24MPa through a high-salt wastewater inlet (1-9), meanwhile, an electromagnetic heating coil (3-2) is utilized, the inlet temperature T2 of a reaction zone (1-3) is kept at 520 ℃, air with the temperature of 25 ℃, 24MPa and the peroxide amount of 1.7 times is passed through oxidant inlets I, II, III (1-12-1, 1-12-2, 1-12-3), the residence time in the reaction system is 90s, the outlet temperature T3 of the cooling zone (1-4) is 480 ℃, the inclined included angle alpha of the reaction system (1) and a separation system (2) is 15 degrees, the included angle beta of a guide plate (2-3) is 30 degrees, wherein a gaseous product is discharged from the top of the device through a hot fluid product outlet (2-4) and simultaneously enters a preheating fluid inlet (1-10), precipitated salt is discharged from the bottom of the device through a precipitated salt outlet (2-5), the oxidation product reaches less than 50mg/L and the direct discharge TDS is less than 250 mg/L.
Example 4
Supercritical water oxidation process: after the preheating process is stable, high-salt wastewater with COD of 200000mg/L and TDS of 7% is introduced into a supercritical water oxidation device with pressure of 28MPa through a high-salt wastewater inlet (1-9), meanwhile, an electromagnetic heating coil (3-2) is utilized, the inlet temperature T2 of a reaction zone (1-3) is kept at 520 ℃, air with 25 ℃, 28MPa and 1.5 times of peroxide amount is introduced into a reaction system through oxidant inlets I, II, III (1-12-1, 1-12-2, 1-12-3), the residence time in the reaction system is 40s, the outlet temperature T3 of the cooling zone (1-4) is 520 ℃, the inclined included angle alpha of the reaction system (1) and a separation system (2) is 45 degrees, the included angle beta of a flow guide plate (2-3) is 20 degrees, wherein a gaseous product is discharged from the top of the device through a hot fluid product outlet (2-4) and simultaneously enters a preheating fluid inlet (1-10), precipitated salt is discharged from the bottom of the device through a precipitated salt outlet (2-5), the oxidation product reaches less than 50mg/L, and the direct discharge/TDS is less than 250 mg/L.
Example 5
Supercritical water oxidation process: after the preheating process is stable, high-salt wastewater with COD of 200000mg/L and TDS of 7% is introduced into a supercritical water oxidation device with pressure of 24MPa through a high-salt wastewater inlet (1-9), meanwhile, an electromagnetic heating coil (3-2) is utilized, the inlet temperature T2 of a reaction zone (1-3) is kept at 500 ℃, air with 25 ℃, 24MPa and 1.5 times of peroxide amount is passed through oxidant inlets I, II, III (1-12-1, 1-12-2, 1-12-3), the residence time in the reaction system is 90s, the outlet temperature T3 of the cooling zone (1-4) is 480 ℃, the inclined included angle alpha of the reaction system (1) and a separation system (2) is 30 ℃, the included angle beta of a flow guide plate (2-3) is 20 ℃, a gaseous product is discharged from the top of the device through a hot fluid product outlet (2-4) and simultaneously enters a preheating fluid inlet (1-10), precipitated salt is discharged from the bottom of the device through a precipitated salt outlet (2-5), the oxidation product reaches less than 50mg/L, the direct discharge of TDS is less than 250mg/L, and the direct discharge requirement of TDS is met.
Example 6
Supercritical water oxidation process: after the preheating process is stable, high-salt wastewater with the COD of 200000mg/L and the TDS of 7% is introduced into a supercritical water oxidation device with the pressure of 26MPa through a high-salt wastewater inlet (1-9), meanwhile, an electromagnetic heating coil (3-2) is utilized, the inlet temperature T2 of a reaction zone (1-3) is kept at 510 ℃, air with the temperature of 25 ℃, 26MPa and the peroxide amount of 1.7 times is passed through oxidant inlets I, II, III (1-12-1, 1-12-2, 1-12-3), the residence time in the reaction system is 90s, the outlet temperature T3 of the cooling zone (1-4) is 500 ℃, the inclined included angle alpha of the reaction system (1) and a separation system (2) is 15 degrees, the included angle beta of a guide plate (2-3) is 20 degrees, wherein a gaseous product is discharged from the top of the device through a hot fluid product outlet (2-4) and simultaneously enters a preheating fluid inlet (1-10), precipitated salt is discharged from the bottom of the device through a precipitated salt outlet (2-5), the oxidation product reaches less than 50mg/L and the direct discharge TDS is less than 250 mg/L.
Example 7
Supercritical water oxidation process: after the preheating process is stable, high-salt wastewater with the COD of 200000mg/L and the TDS of 7% is introduced into a supercritical water oxidation device with the pressure of 24MPa through a high-salt wastewater inlet (1-9), meanwhile, an electromagnetic heating coil (3-2) is utilized, the inlet temperature T2 of a reaction zone (1-3) is kept at 520 ℃, air with the temperature of 25 ℃, 24MPa and the peroxide amount of 1.7 times is passed through oxidant inlets I, II, III (1-12-1, 1-12-2, 1-12-3), the residence time in the reaction system is 80s, the outlet temperature T3 of the cooling zone (1-4) is 520 ℃, the inclined included angle alpha of the reaction system (1) and a separation system (2) is 45 degrees, the included angle beta of a guide plate (2-3) is 30 degrees, wherein a gaseous product is discharged from the top of the device through a hot fluid product outlet (2-4) and simultaneously enters a preheating fluid inlet (1-10), precipitated salt is discharged from the bottom of the device through a precipitated salt outlet (2-5), the oxidation product reaches less than 50mg/L, and the direct discharge/TDS is less than 250 mg/L.
Example 8
Supercritical water oxidation process: after the preheating process is stable, high-salt wastewater with the COD of 200000mg/L and the TDS of 7% is introduced into a supercritical water oxidation device with the pressure of 24MPa through a high-salt wastewater inlet (1-9), meanwhile, an electromagnetic heating coil (3-2) is utilized, the inlet temperature T2 of a reaction zone (1-3) is kept to be 480 ℃, air with the temperature of 25 ℃, 30MPa and the amount of peroxide of 1.7 times is passed through oxidant inlets I, II, III (1-12-1, 1-12-2, 1-12-3), the residence time in the reaction system is 90s, the outlet temperature T3 of the cooling zone (1-4) is 520 ℃, the inclined included angle alpha of the reaction system (1) and a separation system (2) is 15 degrees, the included angle beta of a guide plate (2-3) is 30 degrees, wherein a gaseous product is discharged from the top of the device through a hot fluid product outlet (2-4) and simultaneously enters a preheating fluid inlet (1-10), precipitated salt is discharged from the bottom of the device through a precipitated salt outlet (2-5), the oxidation product reaches less than 50mg/L and the TDS is less than 250mg/L directly discharged.
Example 9
Supercritical water oxidation process: after the preheating process is stable, high-salt wastewater with the COD of 200000mg/L and the TDS of 7% is introduced into a supercritical water oxidation device with the pressure of 28MPa through a high-salt wastewater inlet (1-9), meanwhile, an electromagnetic heating coil (3-2) is utilized, the inlet temperature T2 of a reaction zone (1-3) is kept at 550 ℃, air with the temperature of 25 ℃, 28MPa and the peroxide amount of 1.7 times is passed through oxidant inlets I, II, III (1-12-1, 1-12-2, 1-12-3), the residence time in the reaction system is 90s, the outlet temperature T3 of the cooling zone (1-4) is 520 ℃, the inclined included angle alpha of the reaction system (1) and a separation system (2) is 30 degrees, the included angle beta of a guide plate (2-3) is 15 degrees, wherein a gaseous product is discharged from the top of the device through a hot fluid product outlet (2-4) and simultaneously enters a preheating fluid inlet (1-10), precipitated salt is discharged from the bottom of the device through a precipitated salt outlet (2-5), the oxidation product reaches less than 50mg/L, and the direct discharge/TDS is less than 250 mg/L.
Example 10
Supercritical water oxidation process: after the preheating process is stable, high-salt wastewater with COD of 200000mg/L and TDS of 6% is introduced into a supercritical water oxidation device with pressure of 26MPa through a high-salt wastewater inlet (1-9), meanwhile, an electromagnetic heating coil (3-2) is utilized, the inlet temperature T2 of a reaction zone (1-3) is kept to be 530 ℃, air with 25 ℃, 26MPa and 1.6 times of peroxide amount is introduced into an oxidant inlet I, II, III (1-12-1, 1-12-2, 1-12-3), the residence time in the reaction system is 100s, the outlet temperature T3 of the cooling zone (1-4) is 520 ℃, the inclined included angle alpha of the reaction system (1) and a separation system (2) is 30 ℃, the included angle beta of a flow guide plate (2-3) is 15 ℃, a gaseous product is discharged from the top of the device through a hot fluid product outlet (2-4) and simultaneously enters a preheating fluid inlet (1-10), precipitated salt is discharged from the bottom of the device through a precipitated salt outlet (2-5), the oxidation product reaches less than 50mg/L, the direct discharge of TDS is less than 250mg/L, and the direct discharge requirement of the TDS is met.
Claims (4)
1. A supercritical water oxidation device for high-salinity wastewater treatment is characterized by comprising a reaction system (1), a separation system (2) and a control system (3), wherein the reaction system is connected with the separation system at a certain inclination angle alpha, the main structure of the reaction system is a metal tube (1-1) with a built-in ceramic tube, a preheating zone (1-2), a reaction zone (1-3) and a cooling zone (1-4) are sequentially arranged from top to bottom and respectively correspond to a non-porous ceramic tube (1-5), a porous ceramic tube (1-6) and a non-porous ceramic tube (1-7), a partition plate (1-8) is arranged between the outer wall of the joint of the preheating zone (1-2) and the reaction zone (1-3) and the ceramic tube, and the preheating zone (1-2) is provided with a high-salinity wastewater inlet (1-9), a preheating fluid inlet (1-10) and a preheating fluid outlet (1-11). A plurality of low-temperature oxidant inlets are arranged on two sides of the reaction zone (1-3) and the cooling zone (1-4): an oxidant inlet I (1-12-1), an oxidant inlet II (1-12-2), an oxidant inlet III (1-12-3), a main structure of the separation system is also a metal cylinder (2-2) with a built-in non-porous ceramic tube (2-1), a cooling end of the ceramic tube of the reaction system (1) is obliquely inserted into the lower side in the ceramic tube of the separation system (2) at a certain inclination angle, a downward inclined guide plate (2-3) is arranged at the lower side, the reaction system (1) is connected with the outer side of the separation system (2) through flanges (1-13), the upper end and the lower end of the separation system (2) are respectively provided with a hot fluid product outlet (2-4) and a precipitated salt outlet (2-5), the hot fluid product outlet (2-4) is connected with a reaction system preheating fluid inlet (1-10) through a backpressure valve (2-6) and a connecting pipeline, the reaction system (1) and the separation system (2) are sequentially provided with a heat preservation layer (3-1) and an electromagnetic heating coil (3-2) from inside to outside, the control system comprises a control cabinet (4-1), a measurement and control line (4-2) and various sensors (4-3), and the control cabinet (4-1) is connected with the various sensors (4-3) through the measurement and control line (4-2).
2. The supercritical water oxidation apparatus for high-salinity wastewater treatment according to claim 1, characterized in that: the temperature of the reaction zone (1-3) is 500-700 ℃, the reaction pressure is 23-30 MPa, the peroxide amount is at least 1.5, the retention time is 10-100 s, the outlet temperature of the cooling zone (1-3) is 470-520 ℃, the salt content in water is ensured to be lower than 250mg/L, the GB3838-2002 surface water environment quality standard is met, and the direct discharge requirement is met.
3. The supercritical water oxidation apparatus for high salinity wastewater treatment of claim 1, characterized in that: the included angle alpha between the reaction system and the separation system of the supercritical water oxidation device is 15-45 ℃.
4. The supercritical water oxidation apparatus for high-salinity wastewater treatment according to claim 1, characterized in that: a guide plate structure is arranged in the separation system to reduce back mixing of precipitated salt and hot fluid products, an included angle beta between the guide plate (2-3) and the non-porous ceramic tube is 15-30 degrees, and the guide plate (2-3) and the support frame (2-7) are fixedly connected with the non-porous ceramic tube (2-1).
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5591415A (en) * | 1994-01-27 | 1997-01-07 | Rpc Waste Management Services, Inc. | Reactor for supercritical water oxidation of waste |
| KR20060022743A (en) * | 2004-09-07 | 2006-03-13 | 한화석유화학 주식회사 | The process for oxidative decomposition of wastewater containing organic material by supercritical conditions |
| KR100787173B1 (en) * | 2006-11-10 | 2007-12-21 | 연세대학교 산학협력단 | Oxidation reactor using metal |
| CN104291546A (en) * | 2014-10-26 | 2015-01-21 | 中国科学院重庆绿色智能技术研究院 | Supercritical water oxidizing device |
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| WO2020156337A1 (en) * | 2019-02-03 | 2020-08-06 | 中国原子能科学研究院 | Supercritical water all-in-one machine and organic wastewater treatment method |
| CN112299546A (en) * | 2019-07-31 | 2021-02-02 | 中广核研究院有限公司 | Supercritical water oxidation reactor and supercritical water oxidation system |
| CN114225837A (en) * | 2021-12-22 | 2022-03-25 | 一重集团大连工程技术有限公司 | Composite lining pipe of supercritical water oxidation system reactor |
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| CN109354151A (en) * | 2018-12-12 | 2019-02-19 | 中国科学院上海应用物理研究所 | A kind of supercritical water oxidation system handling Radioactive myocardial damage |
| WO2020156337A1 (en) * | 2019-02-03 | 2020-08-06 | 中国原子能科学研究院 | Supercritical water all-in-one machine and organic wastewater treatment method |
| CN112299546A (en) * | 2019-07-31 | 2021-02-02 | 中广核研究院有限公司 | Supercritical water oxidation reactor and supercritical water oxidation system |
| CN114225837A (en) * | 2021-12-22 | 2022-03-25 | 一重集团大连工程技术有限公司 | Composite lining pipe of supercritical water oxidation system reactor |
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