CN211664775U - Equipment for treating polychlorinated biphenyl-containing substances by supercritical water oxidation method - Google Patents
Equipment for treating polychlorinated biphenyl-containing substances by supercritical water oxidation method Download PDFInfo
- Publication number
- CN211664775U CN211664775U CN201921805789.2U CN201921805789U CN211664775U CN 211664775 U CN211664775 U CN 211664775U CN 201921805789 U CN201921805789 U CN 201921805789U CN 211664775 U CN211664775 U CN 211664775U
- Authority
- CN
- China
- Prior art keywords
- kettle
- preheating
- polychlorinated biphenyl
- mixture
- reaction kettle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Fire-Extinguishing Compositions (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
An apparatus for treating polychlorinated biphenyl-containing substances by a supercritical water oxidation method, comprising: a metering pump; preheating the kettle; a reaction kettle; the outlet end of the metering pump is connected with an inlet end pipeline of the preheating kettle, and the outlet end of the preheating kettle is connected with an inlet end pipeline of the reaction kettle; the metering pump can pump the liquid containing polychlorinated biphenyl, water, oxidant and alkali solution into the preheating kettle in a certain proportion to form a mixture and heat the mixture; the temperature of the mixture reaches 300-374.3 ℃ when the mixture reaches the outlet end of the preheating kettle; the mixture enters a reaction kettle, heating is stopped after the temperature is heated to be above 374.3 ℃,the pressure in the preheating kettle and the pressure in the reaction kettle are kept at 22.1-30 MPa by adjusting the flow rate of the metering pump pumped into the preheating kettle and the flow rate discharged from the reaction kettle, and the temperature in the reaction kettle is kept at 347.3-600 ℃. By the equipment, the polychlorinated biphenyl and the oxidant can be subjected to oxidation reaction to generate CO by utilizing the special supercritical environment2And H2And O, thereby realizing environment-friendly harmless treatment of the polychlorinated biphenyl.
Description
Technical Field
The utility model relates to an abandonment pollutant control in the environmental protection field administers technical field, especially indicates a innocent treatment to persistent organic pollutant polychlorinated biphenyl deals with.
Background
Polychlorinated biphenyls (PCBs) are one of the 12 POPs listed in the Stockholm convention. PCBs are respectively numbered according to the number of chlorine atoms or the percentage content of chlorine, and China customarily divides PCBs into trichlorobiphenyls (PCB3), tetrachlorobiphenyls (PCB4), pentachlorodibiphenyls (PCB5), hexachlorobiphenyls (PCB6), heptachlorobiphenyls (PCB7), octachlorobiphenyls (PCB8), nonachlorobiphenyls (PCB9) and decachlorobiphenyls (PCB10) according to the number of chlorine substituted on the biphenyls (no matter the substituted positions). Polychlorinated biphenyl is a carcinogen, and is easily accumulated in adipose tissues, causing diseases of brain, skin and internal organs, and affecting nervous, reproductive and immune systems. In 2017, 10 and 27, the precancerous substance list published by the international cancer research institution of the world health organization is preliminarily collated and referred, and polychlorinated biphenyl is in the carcinogenic substance list.
Polychlorinated biphenyls for industrial use were stopped in the early 80 s of the last century, but most of industrial equipment containing polychlorinated biphenyls, such as transformers and capacitors, are simply subjected to mountain land sequestration after forced elimination, most sequestration points exceed the design service life at present, and polychlorinated biphenyls have the potential risk of leaking into the environment in the form of surface runoff. The original basic data of China about polychlorinated biphenyl treatment and disposal are not completely reserved, and the data about supercritical water treatment and disposal are basically blank. The polychlorinated biphenyl treatment and disposal method adopted at present is mainly incineration, and the development of an environment-friendly polychlorinated biphenyl treatment and disposal method is urgent due to secondary pollution caused by incineration and the like. For the above reasons, research and development of supercritical water treatment and disposal technology for persistent organic pollutants is necessary and urgent, and the significance is mainly shown in: the processing and disposal of the polychlorinated biphenyl can provide important empirical and theoretical information for the processing and disposal of other POPs in the convention; a new environment-friendly treatment technology is added on the basis of the existing large-scale polychlorinated biphenyl treatment technology in China; provides another feasible implementation way for the stricter fulfillment of the convention in China and provides technical support for the final solution of the problem of persistent organic pollutants which harm the health safety of human beings and the stability of an ecological system in China.
Supercritical Water Oxidation (SCWO) was first proposed by american scholars model in the early 80 th 20 th century, in which the temperature and pressure of Water are raised to above the critical point (critical temperature Tc: 347.3 ℃, critical pressure Pc: 22.1MPa), and Water is in a fluid state, i.e., Supercritical state, which is different from a gas state and a liquid state and a solid state. Because water is a single-phase system with a gas-liquid two-phase interface disappearing in a supercritical state, the water can be mutually dissolved with organic matters, oxygen, air and the like in any proportion, and inorganic substances, particularly salts, have low solubility in supercritical water. The characteristics of supercritical water enable organic matters, oxidant and water to form uniform phases, so that the originally generated multiphase reaction is converted into single-phase reaction, the mass transfer resistance among phases is overcome, the reaction is not limited by phase transfer any more, the reaction rate is accelerated, meanwhile, the oxidation rate of the organic matters is greatly improved under high temperature and high pressure, and the reaction time is only a few seconds to a few minutes generally. And the temperature required by the reaction can be maintained by means of the heat released in the organic matter oxidation process, so that the self-heating is realized. Thus, many scholars have introduced this technology into the treatment of refractory organic hazardous waste.
In view of the above, there is a need for an apparatus and a method for treating polychlorinated biphenyl-containing substances by supercritical water oxidation, which can combine the characteristics and pollution characteristics of polychlorinated biphenyl, apply a new supercritical water oxidation process, take polychlorinated biphenyl-containing liquid as an implementation object, and thoroughly oxidize and decompose polychlorinated biphenyl therein into environmentally friendly CO2 and H2O, realizing ringThe purpose of environment-friendly harmless treatment.
Disclosure of Invention
In view of the above, the main object of the present invention is to provide an apparatus and a method for processing polychlorinated biphenyl-containing substances by supercritical water oxidation, so as to oxidize and decompose polychlorinated biphenyl into CO2 and H2And O, realizing environment-friendly harmless treatment.
The utility model provides an equipment that contains polychlorinated biphenyl material is handled to supercritical water oxidation method, include: a metering pump; preheating the kettle; a reaction kettle; the outlet end of the metering pump is connected with an inlet end pipeline of the preheating kettle, and the outlet end of the preheating kettle is connected with an inlet end pipeline of the reaction kettle; the metering pump can pump the liquid containing polychlorinated biphenyl, water, oxidant and alkali solution into the preheating kettle in a certain proportion to form a mixture and heat the mixture; the temperature of the mixture reaches 300-374.3 ℃ when the mixture reaches the outlet end of the preheating kettle; and (3) feeding the mixture into a reaction kettle, heating to above 374.3 ℃, stopping heating, and regulating the flow rate of the mixture pumped into the preheating kettle by a metering pump and the flow rate of the mixture discharged from the reaction kettle to keep the pressure in the preheating kettle and the reaction kettle at 22.1-30 MPa and keep the temperature in the reaction kettle at 347.3-600 ℃.
By adopting the equipment, the liquid, water, oxidant and alkali solution containing polychlorinated biphenyl can reach a supercritical state, Cl in the polychlorinated biphenyl reacts with the alkali to form inorganic salt and is separated out by utilizing the special environment of the supercritical state, and other substances in the polychlorinated biphenyl are oxidized with the oxidant to generate CO2And H2And O. Thereby realizing the environment-friendly harmless treatment of the polychlorinated biphenyl. Meanwhile, the preheating kettle is communicated with the reaction kettle, the whole process is continuously carried out, the mixed solution is preheated by the preheating kettle, and after the temperature of the mixed solution is close to the temperature required by the supercritical state, the mixture is heated to the temperature required by the supercritical state by the reaction kettle, and then the heating can be stopped. The mixed solution is kept at the temperature required by the supercritical state through the heat generated by the oxidation reaction, so that the energy is saved, the reaction time is saved, the mixture reaches the supercritical state after entering the reaction kettle, the rapid oxidation reaction is started, and the salt in the solution is separated out. Controlling temperature and pressure in a reaction vessel by controlling flowStrong, and makes the control of the equipment simple and convenient.
The utility model discloses it is preferred, still include with the row's salt cauldron of preheating cauldron, reation kettle pipe connection for the salt that precipitates in the recovery preheats cauldron, reation kettle.
Adopt above-mentioned equipment, can be convenient for with preheating the salt recycle who separates out in the cauldron reation kettle, can prevent simultaneously that the salt accumulation that separates out from too much blockking preheating cauldron, reation kettle.
The utility model discloses it is preferred, still include the condenser with reation kettle's exit end pipe connection for with cooling down, step-down, the condensation of discharged mixture among the reation kettle.
By adopting the equipment, the mixture in the supercritical state can be recovered to the normal state, and the water vapor can be condensed into liquid water, so that the recycling is convenient.
The utility model discloses preferably, still include the vapour and liquid separator with the exit end pipe connection of condenser, vapour and liquid separator's exit end with the entry end pipe connection of measuring pump.
By adopting the equipment, CO separated by the condenser can be separated2And discharging air, and collecting and conveying the condensed water to a metering pump for reuse.
The utility model discloses it is preferred, still include: the salt discharging kettle is connected with the pipelines of the preheating kettle and the reaction kettle and is used for recovering salt precipitated in the preheating kettle and the reaction kettle; the condenser is connected with the outlet end pipeline of the reaction kettle and is used for cooling, depressurizing and condensing the mixture discharged from the reaction kettle; wherein, the salt discharging kettle is provided with a pressure reducing port connected with an inlet end pipeline of the condenser.
Adopt above-mentioned equipment, not only can retrieve from preheating the salt that cauldron, reation kettle retrieved, can also retrieve the gas that produces when the cooling of salt discharging cauldron, step-down.
The utility model provides a method for treating polychlorinated biphenyl-containing substances by a supercritical water oxidation method, which comprises the following steps: continuously injecting liquid containing PCBs, water, an oxidant and an alkali solution into a preheating kettle to form a mixture; heating the mixture in the preheating kettle to 300-374.3 ℃; and (3) heating the mixture in the preheating kettle to above 374.3 ℃ in the reaction kettle, stopping heating, and controlling the pressure of the mixture in the reaction kettle to be 22.1-30 MPa, the temperature to be 347.3-600 ℃ and the retention time to be 1-60 min by regulating the flow rate of the mixture pumped into the preheating kettle and discharged out of the reaction kettle.
By adopting the method, the liquid, the water, the oxidant and the alkali solution containing the polychlorinated biphenyl can reach a supercritical state, Cl in the polychlorinated biphenyl reacts with the alkali to form inorganic salt and is separated out by utilizing the special environment of the supercritical state, and other substances in the polychlorinated biphenyl are oxidized with the oxidant to generate CO2And H2And O. Thereby realizing the environment-friendly harmless treatment of the polychlorinated biphenyl. Meanwhile, the preheating kettle is communicated with the reaction kettle, the whole process is continuously carried out, the mixed solution is preheated by the preheating kettle, and after the temperature of the mixed solution is close to the temperature required by the supercritical state, the mixture is heated to the temperature required by the supercritical state by the reaction kettle, and then the heating can be stopped. The heat generated by the oxidation reaction in the reaction kettle enables the mixed solution to reach the temperature required by the supercritical state, thereby saving energy and reaction time, enabling the mixture to reach the supercritical state after entering the reaction kettle, starting rapid oxidation reaction and separating out salt in the solution. The temperature and the pressure in the reaction kettle are controlled by controlling the flow, so that the control is simple and convenient.
The utility model discloses preferentially, the oxidant can be oxygen or hydrogen peroxide.
The utility model discloses preferably, the molar ratio of PCBs and water in the liquid, water, oxidant, alkali solution that contain PCBs is 1:80 ~ 650, preferably 1:160 ~ 350; the molar ratio of the PCBs to the alkali is 1: 1-8; the molar ratio of PCBs to oxygen is 1: 14.5-29; or the molar ratio of the PCBs to the hydrogen peroxide is 1: 29-58
By adopting the method, the utilization rate of the oxidant and the alkali solution can be improved, and the processing cost of the polychlorinated biphenyl can be saved.
The utility model discloses preferentially, the alkali solution can be NaOH, KOH, or Na2CO3An aqueous solution of (a).
By the method, the production cost can be reduced, and the produced salt is easier to recycle.
Drawings
FIG. 1 is a schematic structural diagram of an apparatus for treating polychlorinated biphenyl-containing substances by supercritical water oxidation;
FIG. 2 is a flow chart of a process for treating polychlorinated biphenyl-containing materials by supercritical water oxidation.
Description of the reference numerals
A metering pump 1; an air compressor 2; preheating a kettle 3; a reaction kettle 4; a salt discharging kettle 5; a condenser 6; a gas-liquid separator 7.
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic structural diagram of an apparatus for treating polychlorinated biphenyl-containing substances by a supercritical water oxidation method. As can be seen from FIG. 1, the apparatus for treating polychlorinated biphenyl-containing substances by supercritical water oxidation of the present application comprises: metering pump 1, air compressor 2, preheating kettle 3, reation kettle 4 (supercritical water oxidation reactor), arrange salt cauldron 5, condenser 6, vapour and liquid separator 7.
Wherein, there are three metering pumps 1, which correspond to the alkaline solution, the PCBs-containing solution and the water respectively. Metering pump 1 and air compressor 2's exit end and the entry end of preheating cauldron 3 pass through the pipe connection, the exit end of preheating cauldron 3 and reation kettle 4's entry end pass through the exit end of pipe connection reation kettle 4 and the entry end pipe connection of condenser 6, the exit end of condenser 6 and the entry end pipe connection of vapour and liquid separator 7, vapour and liquid separator 7 has gas vent and leakage fluid dram, the leakage fluid dram of vapour and liquid separator 7 passes through the pipe connection with the entry end of metering pump 1 of water. In addition, the bottoms of the preheating kettle 3 and the reaction kettle 4 are also provided with salt discharge ports which are respectively connected with inlet end pipelines of the two rows of salt kettles 5. The salt discharging kettle 5 is provided with an outlet end and a pressure reducing port. Wherein, the pressure reducing port is connected with the inlet end of the condenser 6 through a pipeline, and the outlet end is used for discharging salt.
Further, the volume of the reaction kettle 4 is 0.5-200L; the volume of the preheating kettle 3 is 1-200L, and the heating temperature range is 0-400 ℃; the volume of the salt discharging kettle 5 is 0.5-50L, and the heating temperature range is 0-600 ℃.
During operationThe metering pump 1 pumps a polychlorinated biphenyl-containing solution (liquid polychlorinated biphenyl, a non-aqueous liquid substance containing polychlorinated biphenyl, such as capacitor oil containing polychlorinated biphenyl, and soaking wastewater and cleaning wastewater containing polychlorinated biphenyl sealed-up places, etc.), an alkali solution (NaOH, KOH, Na2CO3Etc.) and water are conveyed into the preheating kettle 3 through a pipeline according to a certain proportion; at the same time, the compressor adds a certain amount of oxidant (oxygen, air) into the preheating kettle 3. Polychlorinated biphenyl, water, an oxidant and alkali are mixed in the preheating kettle 3 to form a mixture, and the preheating kettle 3 heats the mixture in the flowing process of the mixture in the preheating kettle 3, so that the temperature of the mixture reaches 300-374.3 ℃ when the mixture reaches the outlet end of the preheating kettle 3. The metering pump 1 and the air compressor 2 control the pressure in the preheating kettle 3 and the reaction kettle 4 by adjusting the flow entering the inlet end of the preheating kettle 3 and the flow at the outlet end of the reaction kettle 4, so that the pressure is kept at 22.1-30 MPa. When the mixture is in the preheating kettle 3, the reaction speed is slow due to the low temperature, but Cl and alkali (NaOH, KOH and Na) in the polychlorinated biphenyl2CO3Etc.) a little inorganic salt generated by the reaction is separated out, and the salt can be discharged to the salt discharging kettle 5 through a salt discharging port of the preheating kettle 3. After the mixture enters the reaction kettle 4, the reaction kettle 4 heats the mixture to above 374.3 ℃, then stops heating the mixture, the temperature of the mixture is maintained to above 374.3 ℃ through the heat generated by the oxidation reaction of the mixture, the mixture in the reaction kettle 4 is kept in a supercritical state, the supercritical water oxidation reaction is carried out, and the polychlorinated biphenyl is rapidly decomposed into CO2And H2And O, precipitating a large amount of inorganic salt generated by Cl and alkali in the mixture, and discharging the inorganic salt to a salt discharging kettle 5 through a salt discharging port of the reaction kettle 4 so as to recover the salt. The mixture has been completely oxidized when flowing to the outlet end in the reaction vessel 4, and the substance in the mixture is CO2And H2O, discharged from the outlet end, enters the condenser 6. The mixture enters a condenser 6 for cooling to form liquid water and gaseous CO2And then enters a gas-liquid separator 7. CO in the gas-liquid separator 72Is discharged into the air, and the water is subjected to determination of Chemical Oxygen Demand (COD)cr) After meeting the standard, can be directly discharged or communicatedThe metering pump 1 which adds water into the preheating kettle 3 enters the preheating kettle 3 again for recycling. In addition, discharge the salt in row salt cauldron 5 from row salt mouth and can be accompanied by a small amount of liquid, when row salt cauldron 5 carries out the cooling step-down, can produce a large amount of gases, this gas can discharge condenser 6 through the decompression mouth and carry out gas-liquid separation, can remain high enriched salt solution in row salt cauldron 5, can recycle. Further, it is also possible to use liquid oxidants, such as H, in the selection of the oxidant2O2. When using liquid oxidizing agent, the air compressor 2 can be replaced by the metering pump 1
According to the equipment for treating polychlorinated biphenyl substances by the supercritical water oxidation method, a method for treating polychlorinated biphenyl substances by the supercritical water oxidation method is also provided. As shown in fig. 2, the specific steps are as follows:
1. liquid containing PCBs, water, an oxidant and an alkali solution are continuously injected into the preheating kettle 3 according to a certain proportion to form a mixture.
Wherein the oxidant may be O2Or H2O2When using O2When used as an oxidant, PCBs and O2The molar ratio of (A) to (B) is 1:14.5 to 29, because of O2And H2O2The amount of oxygen provided in the oxidation reaction varies, and therefore, when H is used2O2When used as an oxidizing agent, PCBs and H2O2The molar ratio of (A) to (B) is 1: 29-58. The alkaline solution is an alkaline aqueous solution mainly used for reacting with Cl in PCBs and adjusting the pH value of the system, and is preferably NaOH, KOH or Na2CO3More preferred is NaOH; the molar ratio of the PCBs to the alkali is 1: 1-8. The molar ratio of the PCBs to the water is 1: 80-650, preferably 1: 160-350.
2. And heating the mixture in the preheating kettle 3 to ensure that the temperature reaches 300-374.3 ℃ when the mixture reaches the outlet end of the preheating kettle 3.
3. After the temperature of the mixture is heated to be higher than 374.3 ℃ by the reaction kettle 5, the pressure in the reaction kettle 4 is kept at 22.1-30 MPa, the temperature is kept at 347.3-600 ℃ and the retention time of the mixture in the reaction kettle 4 is 1-60 min by adjusting the flow rate of the mixture pumped into the preheating kettle 3 and discharged out of the reaction kettle 4.
Wherein, inorganic salt generated by the reaction of Cl in PCBs and alkali can be precipitated from supercritical water; other materials in PCBs will be oxidatively decomposed into harmless CO2 and H2O, and the simultaneous oxidative decomposition generates a large amount of heat, and the temperature of the mixture entering the reaction vessel 4 can be maintained in a supercritical state.
4. And recovering the precipitated inorganic salt, cooling the mixture, reducing the pressure, condensing to realize gas-liquid separation, and detecting the chemical oxygen demand (CODcr) of the liquid.
The recovered inorganic salt can be reused; whether the PCBs completely react and reach the emission standard can be determined by detecting the CODcr of the liquid after the reaction.
According to the above embodiment, the present invention also provides three specific embodiments.
Example 1
Example 1 is a method for treating polychlorinated biphenyl-containing substances by supercritical water oxidation corresponding to the first embodiment. The method comprises the following specific steps:
1. capacitor oil containing PCBs, water, oxygen and 5% sodium hydroxide solution are continuously injected into the preheating kettle 3 according to the mass ratio of 1:20:2.5:13 respectively to form a gas-liquid mixture.
2. The mixture in the preheating kettle 3 is heated, so that the temperature reaches 360 ℃ when the mixture reaches the outlet end of the preheating kettle 3.
3. The gas-liquid mixture enters the reaction kettle 4, heating is stopped after the temperature is heated to be higher than 374.3 ℃, the pressure of the mixture in the reaction kettle 4 is kept at 25MPa, the temperature is kept at 400 ℃, and the retention time is 30 min.
4. And recovering the precipitated inorganic salt, cooling the gas-liquid mixture, reducing the pressure, condensing to realize gas-liquid separation, and detecting whether the chemical oxygen demand (CODcr) of the liquid reaches 15 mg/L.
Example 2
Example 2 is a method for treating polychlorinated biphenyl-containing substances by supercritical water oxidation corresponding to the first embodiment. The method comprises the following specific steps:
1. capacitor oil containing PCBs, water, oxygen and 9% potassium hydroxide solution are continuously injected into the preheating kettle 3 according to the mass ratio of 1:20:2.5:13 respectively to form a gas-liquid mixture.
2. The mixture in the preheating kettle 3 is heated, so that the temperature reaches 360 ℃ when the mixture reaches the outlet end of the preheating kettle 3.
3. The gas-liquid mixture enters the reaction kettle 4, heating is stopped after the temperature is heated to be higher than 374.3 ℃, the pressure of the mixture in the reaction kettle 4 is kept at 25MPa, the temperature is kept at 400 ℃, and the retention time is 30 min.
4. And recovering the precipitated inorganic salt, cooling the gas-liquid mixture, reducing the pressure, condensing to realize gas-liquid separation, and detecting whether the chemical oxygen demand (CODcr) of the liquid reaches 19 mg/L.
Example 3
Example 1 is a method for treating polychlorinated biphenyl-containing substances by supercritical water oxidation corresponding to the second embodiment. The method comprises the following specific steps:
1. continuously injecting capacitor oil containing PCBs, water, 30% hydrogen peroxide and 5% sodium hydroxide solution into the preheating kettle 3 according to the mass ratio of 1:5:17.7:13 respectively to form a mixture.
2. The mixture in the preheating kettle 3 is heated, so that the temperature reaches 360 ℃ when the mixture reaches the outlet end of the preheating kettle 3.
3. The gas-liquid mixture enters the reaction kettle 4, heating is stopped after the temperature is heated to be higher than 374.3 ℃, the pressure of the mixture in the reaction kettle 4 is kept at 25MPa, the temperature is kept at 400 ℃, and the retention time is 30 min.
4. And (3) recovering the precipitated inorganic salt, cooling the mixture, reducing the pressure, condensing to realize gas-liquid separation, and detecting whether the chemical oxygen demand (CODcr) of the liquid reaches 20 mg/L.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. An apparatus for treating polychlorinated biphenyl-containing substances by a supercritical water oxidation method, comprising:
a metering pump;
a preheating kettle for heating the internal mixture to 300-374.3 ℃;
a reaction kettle;
the outlet end of the metering pump is connected with an inlet end pipeline of the preheating kettle, and the outlet end of the preheating kettle is connected with an inlet end pipeline of the reaction kettle; the metering pump can pump the liquid containing polychlorinated biphenyl, water, oxidant and alkali solution into the preheating kettle in certain proportion to form mixture.
2. The apparatus for treating polychlorinated biphenyl-containing substances by the supercritical water oxidation process as claimed in claim 1, further comprising a salt discharge kettle connected to the preheating kettle and the reaction kettle through pipes for recovering salts precipitated in the preheating kettle and the reaction kettle.
3. The apparatus for treating polychlorinated biphenyl-containing substances by the supercritical water oxidation process as claimed in claim 1, further comprising a condenser connected to an outlet end pipe of the reaction vessel, for cooling, depressurizing and condensing the mixture discharged from the reaction vessel.
4. The apparatus for treating polychlorinated biphenyl-containing substances according to claim 3, further comprising a gas-liquid separator connected to an outlet end pipe of the condenser, wherein an outlet end of the gas-liquid separator is connected to an inlet end pipe of the metering pump.
5. The apparatus for treating polychlorinated biphenyl-containing substances by supercritical water oxidation as claimed in claim 1, further comprising:
the salt discharging kettle is connected with the pipelines of the preheating kettle and the reaction kettle and is used for recovering salt precipitated in the preheating kettle and the reaction kettle;
the condenser is connected with the outlet end pipeline of the reaction kettle and is used for cooling, depressurizing and condensing the mixture discharged from the reaction kettle;
wherein, the salt discharging kettle is provided with a pressure reducing port connected with an inlet end pipeline of the condenser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921805789.2U CN211664775U (en) | 2019-10-24 | 2019-10-24 | Equipment for treating polychlorinated biphenyl-containing substances by supercritical water oxidation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921805789.2U CN211664775U (en) | 2019-10-24 | 2019-10-24 | Equipment for treating polychlorinated biphenyl-containing substances by supercritical water oxidation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211664775U true CN211664775U (en) | 2020-10-13 |
Family
ID=72730538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921805789.2U Active CN211664775U (en) | 2019-10-24 | 2019-10-24 | Equipment for treating polychlorinated biphenyl-containing substances by supercritical water oxidation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211664775U (en) |
-
2019
- 2019-10-24 CN CN201921805789.2U patent/CN211664775U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105776794B (en) | A kind of method of catalytic wet oxidation processing industrial sludge | |
| CN105399174B (en) | Low energy consumption extracting and dephenolizing coal chemical industry wastewater and phenol recycling complete set of equipments and processing method | |
| CN108529791A (en) | The processing method of deep removal COD in a kind of raffinate from nickel cobalt | |
| CN110723804A (en) | Equipment and method for treating polychlorinated biphenyl-containing substances by supercritical water oxidation method | |
| CN109293148A (en) | A kind of processing unit and its processing method of sulfur-bearing brine waste | |
| CN109607571A (en) | A kind of disposal of resources technique of highly concentrated organic spent lye | |
| CN211664775U (en) | Equipment for treating polychlorinated biphenyl-containing substances by supercritical water oxidation method | |
| KR102245666B1 (en) | Catalytic systems and methods for process stream treatment | |
| CN105016551A (en) | Treatment method of organic nitrogen containing waste lye generated in liquid hydrocarbon refining process | |
| CN104071913A (en) | Pollution-free processing method of sulfur-containing waste alkaline solution | |
| CN106565009B (en) | Alkaline residue waste liquid catalytic treatment device and method based on waste heat utilization | |
| CN106277533A (en) | A kind of system and method processing pulverized coal pyrolysis sewage | |
| CN113354228A (en) | Method for treating oily sludge through supercritical water oxidation | |
| CN101850168B (en) | Technical process for supercritical water treatment of polychlorinated biphenyls (PCBs) waste and complete plant thereof | |
| JP2002138057A (en) | Method and equipment for treating halogen based organic waste | |
| JP2005246153A (en) | High temperature/high pressure treatment method for organic waste | |
| CN215250125U (en) | Supercritical fluid extraction and electrochemical coupling treatment system for high-salt and high-organic wastewater | |
| CN212293278U (en) | Multi-stage treatment facility for oil sludge | |
| Liu et al. | TREATMENT OF OILY WASTEWATER BY THE FENTON REAGENT AND WET HYDROGEN PEROXIDE OXIDATION. | |
| CN107673459A (en) | A kind of method of antifebrin in removal waste water | |
| CN204848562U (en) | Coal gasification effluent disposal system | |
| CN103011322A (en) | Method for treating wastewater produced by rosin deep processing | |
| JP2014108408A (en) | Dehydration treatment apparatus for pcb contaminated sludge or residues, and pcb processing system using the same | |
| TWI535668B (en) | Recycling of metal waste | |
| JP2005270816A (en) | High temperature, high pressure treatment apparatus for organic waste |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210416 Address after: Room 201, building 139, south of Xichang Tu Road, Changping Railway Station, machikou Town, Changping District, Beijing 102299 Patentee after: CAMDEX (BEIJING) ENERGY ENVIRONMENT SCIENCE & TECHNOLOGY Co.,Ltd. Address before: 100083 Beijing City, Haidian District Zhongguancun Road No. 18 smartfortune International Building, block A room 1906 Patentee before: BEIJING BIOTECHINA ENVIRONMENT Corp.,Ltd. |
|
| TR01 | Transfer of patent right |