CN111620432A - Cyclone supercritical water oxidation reactor - Google Patents
Cyclone supercritical water oxidation reactor Download PDFInfo
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- CN111620432A CN111620432A CN202010537410.5A CN202010537410A CN111620432A CN 111620432 A CN111620432 A CN 111620432A CN 202010537410 A CN202010537410 A CN 202010537410A CN 111620432 A CN111620432 A CN 111620432A
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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
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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
- C02F1/727—Treatment of water, waste water, or sewage by oxidation using pure oxygen or oxygen rich gas
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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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
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
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- Hydrology & Water Resources (AREA)
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- Organic Chemistry (AREA)
- Cyclones (AREA)
Abstract
The invention provides a cyclone supercritical water oxidation reactor, which comprises a reactor cylinder, an electric heating module wrapped on the periphery of the reactor cylinder and a sealing cover connected with the reactor cylinder, wherein the electric heating module is arranged on the periphery of the reactor cylinder; the reactor barrel comprises a cylindrical barrel body, a conical barrel body, a water inlet pipe and a salt discharge pipe, wherein the conical barrel body is connected with the cylindrical barrel body and arranged below the cylindrical barrel body, the water inlet pipe is arranged on the inner wall of the cylindrical barrel body, the salt discharge pipe is arranged at the bottom of the conical barrel body, and the extension direction of the water inlet pipe is horizontal and tangent to the inner wall of the cylindrical barrel body. According to the cyclone supercritical water oxidation reactor, organic waste liquid, water and an oxidant perform cyclone motion in a supercritical region of the reactor, so that precipitated inorganic salt is effectively prevented from being deposited on the inner surface of the supercritical region, inorganic salt particles generated in the reaction process fall into the subcritical region under the action of gravity to be dissolved again and are discharged from the bottom, and long-term stable operation of the reactor is guaranteed; and the reactor has compact structure and small occupied area.
Description
Technical Field
The invention relates to the technical field of organic waste liquid treatment, in particular to a cyclone supercritical water oxidation reactor.
Background
The supercritical water oxidation (SCWO) is a process for removing organic waste by oxidizing organic waste with oxidants such as air and oxygen in supercritical water, wherein the reaction rate of the system in the supercritical water oxidation technology is high, and C, H, O in organic substances is finally converted into CO2And H2O and S, P, N are converted to SO4 2-、PO4 3-、N2And the organic matters can be effectively degraded without secondary pollution, and the removal rate of the organic matters by the supercritical water oxidation method reaches over 99 percent.
At normal temperature, water is an excellent solvent for most salts, and the solubility can reach 100g/L, however, the solubility of most salts in supercritical water is extremely low. In the supercritical water oxidation technology, the solubility of salt is continuously reduced along with the rise of reaction temperature, inorganic salt particles separated out and crystallized in fluid are continuously deposited on the inner wall and inner components of a reactor, the pressure drop of the reactor is increased, heat transfer is deteriorated, the blockage and corrosion of the reactor are aggravated, the SCWO device is finally forced to be shut down, cleaned, assembled, pressure tested and restarted, and the reliability and the economy of the operation of the SCWO device are seriously influenced.
Disclosure of Invention
The invention aims to provide a cyclone supercritical water oxidation reactor to solve the problem that inorganic salt particles are deposited on the inner wall of the reactor.
In order to achieve the aim, the invention provides a cyclone supercritical water oxidation reactor, which comprises a reactor cylinder, an electric heating module wrapped on the periphery of the reactor cylinder and a sealing cover connected with the reactor cylinder; the reactor barrel comprises a cylindrical barrel body, a conical barrel body, a water inlet pipe and a salt discharge pipe, wherein the conical barrel body is connected with the cylindrical barrel body and arranged below the cylindrical barrel body, the water inlet pipe is arranged on the inner wall of the cylindrical barrel body, the salt discharge pipe is arranged at the bottom of the conical barrel body, and the extension direction of the water inlet pipe is horizontal and tangent to the inner wall of the cylindrical barrel body.
The lower end of the cylindrical barrel is welded with the upper end of the conical barrel, and the conical tip of the conical barrel faces downwards.
The inlet tube sets up on the inner wall at cylindrical barrel top through the welding, arrange the salt pipe and set up in the bottom of conical barrel through the welding.
The cylindrical barrel and the conical barrel are both made of nickel-based alloy materials, and the inner walls of the cylindrical barrel and the conical barrel are coated with anticorrosive materials.
The electric heating module comprises a supercritical heating module arranged on the periphery of the cylindrical barrel, a subcritical heating module arranged on the periphery of the conical barrel, and a heat insulation layer arranged on the peripheries of the supercritical heating module and the subcritical heating module, and the supercritical heating module is arranged to heat the cylindrical barrel to 600 ℃ so as to form a supercritical temperature area in the cylindrical barrel; the subcritical heating module is configured to heat the conical cylinder to 250 ℃ and 350 ℃ so as to form a subcritical temperature zone in the conical cylinder.
The supercritical heating module is arranged only on the upper half part of the outer periphery of the cylindrical barrel body, and the supercritical heating module and the subcritical heating module are spaced apart.
The heat insulation layer is made of flame-retardant aluminum silicate material.
The sealing cover comprises an upper end cover plate connected with the reactor barrel, and a supercritical area thermocouple, a subcritical area thermocouple, a pressure gauge, a safety valve and a central tube, wherein the supercritical area thermocouple, the subcritical area thermocouple, the pressure gauge, the safety valve and the central tube are inserted into the hole in the upper end cover plate, a temperature probe of the supercritical area thermocouple is arranged in the cylindrical barrel, a temperature probe of the subcritical area thermocouple is arranged in the conical barrel, the central tube comprises a bell mouth and a water outlet pipe located above the bell mouth, the bottommost part of the bell mouth is arranged in the cylindrical barrel, and the lower end of the water outlet pipe is welded with the bell mouth.
The upper end cover plate is made of nickel-based alloy, the lower surface of the upper end cover plate is coated with an anticorrosive material, and the upper end cover plate is connected with the upper end of the cylindrical barrel through a high-temperature-resistant bolt; and the central tube is made of nickel-based alloy, and the surface of the central tube is coated with an anticorrosive material.
The nickel-based alloy material is at least one of alloy 625 and Hastelloy C276, and the anticorrosive material comprises TiN and Al2O3And TiO2At least one of (1).
According to the cyclone supercritical water oxidation reactor, organic waste liquid, water and an oxidant perform cyclone motion in a supercritical region of the reactor, so that inorganic salt precipitated in a supercritical water oxidation (SCWO) process is effectively prevented from being deposited on the inner surface of the supercritical region, inorganic salt particles generated in a reaction process fall into the subcritical region under the action of gravity to be dissolved again and are discharged from the bottom, the problems of deposition of the inorganic salt on the inner surface of the reactor and a central pipe water outlet, uneven distribution of boundary fluid and the like can be solved, and long-term stable operation of the reactor is guaranteed; and the cyclone supercritical water oxidation reactor has compact structure and small occupied area.
Drawings
FIG. 1 is a schematic diagram of a cyclone supercritical water oxidation reactor according to one embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a top view of the cyclone supercritical water oxidation reactor shown in FIG. 1;
FIG. 4 is a schematic view of the movement of the internal fluid during operation of the device of the present invention.
In the figure, 1-a cylindrical barrel, 2-a conical barrel, 3-a water inlet pipe, 4-a salt discharge pipe, 5-a supercritical heating module, 6-a subcritical heating module, 7-a heat insulation layer, 8-supporting legs, 9-an upper end cover plate, 10-a high temperature resistant bolt, 11-a supercritical area thermocouple, 12-a subcritical area thermocouple, 13-a pressure gauge, 14-a safety valve, 15-a central pipe, 151-a bell mouth and 152-a water outlet pipe.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Fig. 1 shows a cyclone supercritical water oxidation reactor according to an embodiment of the present invention, which includes a reactor cylinder, an electric heating module wrapped around the reactor cylinder, and a sealing cover connected to the reactor cylinder. The reactor cylinder is connected with a sealing cover to seal the reactor cylinder.
As shown in fig. 1, the reactor barrel comprises a cylindrical barrel 1, a conical barrel 2 connected with the cylindrical barrel 1 and arranged below the cylindrical barrel, a water inlet pipe 3 arranged on the inner wall of the cylindrical barrel 1, and a salt discharge pipe 4 arranged at the bottom of the conical barrel 2. The lower end of the cylindrical barrel body 1 is welded with the upper end of the conical barrel body 2, and the conical tip of the conical barrel body 2 is downward, so that inorganic salt which cannot be dissolved in time is collected and discharged at the conical tip. The cylindrical barrel 1 and the conical barrel 2 are both made of nickel-based alloy material, the nickel-based alloy material can be at least one of alloy 625 and Hastelloy C276, the inner walls of the nickel-based alloy material and the Hastelloy C276 are coated with anticorrosive material, and the anticorrosive material comprises TiN and Al2O3And TiO2Etc. for improving the corrosion resistance of the reactor barrel. The cylindrical barrel body 1 and the conical barrel body 2 can resist high temperature of 650 ℃ and high pressure of 30 MPa.
As shown in fig. 2, the extension direction of the water inlet pipe 3 is horizontal and tangential to the inner wall of the cylindrical barrel 1 (i.e. the extension direction of the water inlet pipe 3 is tangential to the inner wall of the cylindrical barrel 1), so that, as shown in fig. 4, the reactor barrel is fixed, the organic waste liquid, the water and the oxidant enter the reactor barrel through the water inlet pipe 3 at a certain initial flow rate in tangential direction and rotate in the cylindrical barrel 1, and the water body can form a spiral rotational flow downward around the center of the cylindrical barrel. The water inlet pipe 3 is arranged on the inner wall of the top of the cylindrical barrel 1 through welding. The salt discharging pipe 4 is arranged at the bottom of the conical cylinder body 2 through welding, and the pipe orifice is flush with the bottom of the conical cylinder body 2 and is used for discharging the salt water in the conical cylinder body 2.
Referring to fig. 1 again, the electric heating module includes a supercritical heating module 5 disposed on the periphery of the cylindrical barrel 1, a subcritical heating module 6 disposed on the periphery of the conical barrel 2, and a heat insulating layer 7 disposed on the peripheries of the supercritical heating module 5 and the subcritical heating module 6. The supercritical heating module 5 is configured to heat the cylindrical barrel 1 to 500-. The subcritical heating module 6 is configured to heat the conical cylinder 2 to 250-350 ℃, so that a subcritical temperature zone is formed in the conical cylinder 2. Wherein, supercritical heating module 5 only sets up in the first half of cylindrical barrel 1's periphery, and separates between supercritical heating module 5 and the subcritical heating module 6 to reduce the temperature influence that comes from cylindrical barrel 1, and then guarantee that conical barrel 2's temperature is not higher than 350 ℃ all around. The heat insulation layer 7 is made of flame-retardant aluminum silicate material and is arranged on the peripheries of the supercritical heating module 5 and the subcritical heating module 6 so as to play a role in heat insulation of the cylindrical barrel body 1 and the conical barrel body 2, save energy consumption and reduce the surface temperature around the reactor.
Supporting legs 8 are further arranged below the cyclone supercritical water oxidation reactor, the number of the supporting legs 8 is 4, and the supporting legs are evenly arranged below the cyclone supercritical water oxidation reactor.
As shown in fig. 1 to 3, the sealing cap includes an upper end cap plate 9 connected to the reactor cylinder by a high temperature resistant bolt 10, and a supercritical region thermocouple 11, a subcritical region thermocouple 12, a pressure gauge 13, a safety valve 14, and a center tube 15 inserted into an opening of the upper end cap plate 9. The upper end cover plate 9 is made of nickel-based alloy, the lower surface of the upper end cover plate is coated with anticorrosive materials, and the upper end cover plate is connected with the upper end of the cylindrical barrel 1 through a high-temperature-resistant bolt 10 so as to seal the reactor barrel and form a closed high-temperature-resistant reactor with the reactor barrel. The temperature probe of the thermocouple 11 in the supercritical region is arranged in the cylindrical barrel area and is used for measuring the temperature in the cylindrical barrel 1, so that the opening and closing of the supercritical heating module 5 are controlled according to the temperature in the cylindrical barrel 1, and the temperature in the cylindrical barrel 1 is further controlled to be 500-600 ℃. The temperature probe of the subcritical zone thermocouple 12 is arranged in the conical barrel 5 and is arranged to measure the temperature in the conical barrel 2, so that the opening and closing of the subcritical heating module 6 are controlled, and the reaction temperature in the conical barrel 2 is controlled to be 250-350 ℃. A pressure gauge 13 is provided to monitor the pressure inside the reactor barrel. The safety valve 14 is in a normally closed state and is arranged in the cylinder of the reactorThe pressure inside the reactor is 10% higher than the maximum working pressure, and the pressure is discharged outwards, so that the protection effect on personnel and the operation of the reactor is realized. The central tube 15 is made of a nickel-based alloy material, the surface of the central tube is coated with an anticorrosive material, the nickel-based alloy material is at least one of alloy 625 and Hastelloy C276, and the anticorrosive material comprises TiN and Al2O3And TiO2At least one of (1). The central tube 15 comprises a bell mouth 151 and an outlet tube 152 located above the bell mouth 151. The bottommost part of the bell mouth 151 is arranged in the cylindrical barrel 1 so as to discharge purified water in a supercritical region, but not discharge inorganic salt-containing wastewater in a subcritical region, and form a cyclone-type motion track; the lower end of the water outlet pipe 152 is welded with the bell mouth 151 and is used for collecting and discharging the purified water after treatment.
The working principle of the cyclone supercritical water oxidation reactor of the present invention will be described with reference to FIG. 4.
The specific working principle of the invention is as follows: organic waste liquid to be treated, water and an oxidant (oxygen, hydrogen peroxide and the like in the embodiment) are fully and uniformly mixed and preheated, and because the required time of the supercritical water oxidation reaction is extremely short, the organic waste liquid, the water and the oxidant can enter the cylindrical barrel 1 along the tangent line of the inner wall at a high flow rate through the water inlet pipe 3, so that the initial speed is provided for the subsequent rotary motion. In the cylindrical barrel 1, water is used as a liquid phase main body, liquid oxygen is used as an oxidant, the supercritical heating module 5 provides high temperature (controlled by the supercritical thermocouple 11), the continuously entering organic waste liquid, water and oxidant provide high pressure for the closed container (monitored by the pressure gauge 13), and when the pressure in the reactor is greater than 10% of the maximum working pressure, the pressure is discharged out of the reactor through the safety valve 14, so that the protection effect is realized on personnel and the operation of the reactor. When the temperature and the pressure exceed the critical point of water, the physical properties of the water are obviously changed, such as reduction of dielectric constant, increase of diffusion coefficient, reduction of viscosity and the like, so that the supercritical water has good solvent capacity and transfer property. Organic matter and oxygen can be mutually dissolved in supercritical water in any proportion to form a homogeneous system, and the influence of mass transfer resistance is eliminated, so that organic waste liquid can be rapidly and thoroughly oxidized into CO2And H2And O and the like. The heat insulation layer 7 is arranged on the cylindrical barrel 1 and the conical shapeThe cylinder body 2 plays a role in heat preservation, saves energy consumption and reduces the temperature of the peripheral surface of the reactor. As the reaction proceeds, a large amount of inorganic salts are generated in the cylindrical barrel 1. As shown in figure 4, the inorganic salt in the cylindrical barrel 1 rotates from top to bottom along the inner wall, and the inorganic salt moves towards the direction of the inner wall far away from the center under the action of centrifugal force and is separated from the homogeneous reaction system, so that the salt deposition is effectively avoided. The inorganic salts fall into the conical cylinder 2 along the inner wall under the action of gravity, and the purified water after treatment is discharged upwards along the central tube 15, and the purified water only contains water. The temperature in the conical barrel 2 is controlled by the subcritical zone thermocouple 12, subcritical water is filled in the conical barrel, inorganic salt is dissolved in the subcritical water again and is discharged through the salt discharge pipe 4, and waste water containing the inorganic salt is discharged from the salt discharge pipe 4, so that the long-term stable operation of the equipment is ensured. The central pipe 15 is used for continuously discharging purified water, and the salt discharge pipe 4 periodically discharges a small amount of inorganic salt-containing wastewater.
The above embodiments are merely preferred embodiments of the present invention, which are not intended to limit the scope of the present invention, and various changes may be made in the above embodiments of the present invention. All simple and equivalent changes and modifications made according to the claims and the content of the specification of the present application fall within the scope of the claims of the present patent application. The invention has not been described in detail in order to avoid obscuring the invention.
Claims (10)
1. A cyclone supercritical water oxidation reactor is characterized by comprising a reactor cylinder, an electric heating module wrapped on the periphery of the reactor cylinder, and a sealing cover connected with the reactor cylinder;
the reactor barrel comprises a cylindrical barrel body (1), a conical barrel body (2) connected with the cylindrical barrel body (1) and arranged below the cylindrical barrel body, a water inlet pipe (3) arranged on the inner wall of the cylindrical barrel body (1) and a salt discharge pipe (4) arranged at the bottom of the conical barrel body (2), and the extension direction of the water inlet pipe (3) is horizontal and tangent to the inner wall of the cylindrical barrel body (1).
2. A cyclone supercritical water oxidation reactor as defined in claim 1 wherein the lower end of the cylindrical barrel (1) is welded to the upper end of the conical barrel (2) with the cone tip of the conical barrel (2) facing downwards.
3. A cyclone supercritical water oxidation reactor as claimed in claim 1, characterized in that the water inlet pipe (3) is welded on the inner wall of the top of the cylindrical barrel (1), and the salt discharge pipe (4) is welded on the bottom of the conical barrel (2).
4. A cyclone supercritical water oxidation reactor as claimed in claim 1, wherein the cylindrical barrel (1) and the conical barrel (2) are made of nickel-based alloy material, and the inner walls thereof are coated with anticorrosive material.
5. The cyclone supercritical water oxidation reactor according to claim 1, wherein the electric heating module comprises a supercritical heating module (5) arranged at the periphery of the cylindrical barrel (1), a subcritical heating module (6) arranged at the periphery of the conical barrel (2), and a heat insulation layer (7) arranged at the peripheries of the supercritical heating module (5) and the subcritical heating module (6), wherein the supercritical heating module (5) is arranged to heat the cylindrical barrel (1) to 500 ℃ and 600 ℃ so as to form a supercritical temperature zone in the cylindrical barrel (1); the subcritical heating module (6) is arranged to heat the conical cylinder (2) to the temperature of 250 ℃ and 350 ℃ so as to form a subcritical temperature zone in the conical cylinder (2).
6. A cyclone-type supercritical water oxidation reactor according to claim 5, characterized in that the supercritical heating module (5) is provided only on the upper half of the outer circumference of the cylindrical drum (1), and the supercritical heating module (5) and the subcritical heating module (6) are spaced apart.
7. A cyclone supercritical water oxidation reactor as defined in claim 5 wherein the heat insulating layer (7) is a fire retardant aluminum silicate material.
8. A cyclone-type supercritical water oxidation reactor according to claim 1, characterized in that the sealing cover comprises an upper end cover plate (9) connected with the reactor cylinder, and a supercritical zone thermocouple (11), a subcritical zone thermocouple (12), a pressure gauge (13), a safety valve (14) and a central tube (15) which are inserted into the opening of the upper end cover plate (9), the temperature probe of the supercritical region thermocouple (11) is arranged in the cylindrical barrel body (1), the temperature probe of subcritical zone thermocouple (12) sets up in conical barrel (2), center tube (15) include horn mouth (151) and outlet pipe (152) that are located horn mouth (151) top, and the bottommost setting of horn mouth (151) is in cylindrical barrel (1), the lower extreme and the horn mouth (151) welding of outlet pipe (152).
9. A cyclone supercritical water oxidation reactor as claimed in claim 8, wherein the upper end cover plate (9) is made of nickel-based alloy, the lower surface of which is coated with anticorrosive material and is connected with the upper end of the cylindrical barrel (1) through a high temperature resistant bolt (10); and the central tube (15) is made of nickel-based alloy, and the surface of the central tube is coated with an anticorrosive material.
10. The cyclone-type supercritical water oxidation reactor as claimed in claim 4 or 9, wherein the nickel-based alloy material is at least one of alloy 625 and hastelloy C276, and the corrosion-resistant material comprises TiN, Al2O3And TiO2At least one of (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010537410.5A CN111620432A (en) | 2020-06-12 | 2020-06-12 | Cyclone supercritical water oxidation reactor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010537410.5A CN111620432A (en) | 2020-06-12 | 2020-06-12 | Cyclone supercritical water oxidation reactor |
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| CN202010537410.5A Pending CN111620432A (en) | 2020-06-12 | 2020-06-12 | Cyclone supercritical water oxidation reactor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112811568A (en) * | 2021-02-07 | 2021-05-18 | 江苏省环境科学研究院 | Heterogeneous catalysis supercritical water oxidation reactor |
| CN112979040A (en) * | 2021-02-26 | 2021-06-18 | 生态环境部南京环境科学研究所 | Wastewater treatment equipment for catalytic oxidation remediation of organochlorine pesticide contaminated soil |
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| CN109179825A (en) * | 2018-08-07 | 2019-01-11 | 广州中国科学院先进技术研究所 | A kind of high-COD waste water Zero discharging system with high salt and process without drainage of waste water |
| US20190248685A1 (en) * | 2016-09-06 | 2019-08-15 | Guangzhou Institute Of Advanced Technology, Chinese Academy Of Sciences | Reactor and reaction system based on supercritcal water oxidation, and phenolic wastewater treatment method |
| CN111237784A (en) * | 2020-03-11 | 2020-06-05 | 西安交通大学 | Supercritical hydrothermal combustion device and method |
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2020
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101560014A (en) * | 2009-05-05 | 2009-10-21 | 西安交通大学 | Zoning method of supercritical water treatment reactor of waste organism |
| CN105692863A (en) * | 2016-04-20 | 2016-06-22 | 中国科学院上海应用物理研究所 | Anti-blocking super-critical water oxidation reactor |
| US20190248685A1 (en) * | 2016-09-06 | 2019-08-15 | Guangzhou Institute Of Advanced Technology, Chinese Academy Of Sciences | Reactor and reaction system based on supercritcal water oxidation, and phenolic wastewater treatment method |
| CN109179825A (en) * | 2018-08-07 | 2019-01-11 | 广州中国科学院先进技术研究所 | A kind of high-COD waste water Zero discharging system with high salt and process without drainage of waste water |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112811568A (en) * | 2021-02-07 | 2021-05-18 | 江苏省环境科学研究院 | Heterogeneous catalysis supercritical water oxidation reactor |
| CN112979040A (en) * | 2021-02-26 | 2021-06-18 | 生态环境部南京环境科学研究所 | Wastewater treatment equipment for catalytic oxidation remediation of organochlorine pesticide contaminated soil |
| CN112979040B (en) * | 2021-02-26 | 2022-09-02 | 生态环境部南京环境科学研究所 | Wastewater treatment equipment for catalytic oxidation remediation of organochlorine pesticide contaminated soil |
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