CN105645554A - Processing method of circulating water - Google Patents
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- CN105645554A CN105645554A CN201410731101.6A CN201410731101A CN105645554A CN 105645554 A CN105645554 A CN 105645554A CN 201410731101 A CN201410731101 A CN 201410731101A CN 105645554 A CN105645554 A CN 105645554A
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Abstract
The invention discloses a processing method of circulating water. According to the processing method, high COD circulating water generated because of material leakage is delivered into a catalytic wet air oxidation reactor from a circulating water system for processing; the catalytic wet air oxidation reactor is loaded with a fixed bed catalyst, wherein the fixed bed catalyst comprises a carrier, an active metal ingredient, and an accessory ingredient; circulating water processed via catalytic wet air oxidation is delivered into a gas-liquid separator for gas-liquid separation, and separated high temperature water is used for heating reactor inflow, and then is recycled back to the circulating water system. One or a plurality of elements selected from Pt, Pd, Rh, and Ru are taken as the active metal ingredient; a rare earth metal is taken as the accessory ingredient, active carbon with a particle size of 150 to 300 meshes is taken as the core of the carrier, and amorphous alumina is taken as the shell of the carrier, the weight amount of active carbon accounts for 30 to 70% of the amount of the carrier, and the weight amount of amorphous alumina accounts for 30 to 70% of the amount of the carrier. The processing method can be used for removing organic matters and S2- in circulating water with high efficiency, and the discharged processed circulating water can be recycled back to the circulating water system directly after heat exchange, so that water quality pollution caused by material leakage of the circulating water system is solved, and processing energy consumption is relatively low.
Description
Technical field
The invention belongs to environmental conservation and industrial energy saving water-saving technology field, be specifically related to the processing method of a kind of recirculated water.
Background technology
The industrial circulating water system majority of China adopts unenclosed construction, it is easy to cooperating microorganisms; And in circulation, heat transmission equipment uses for a long time, can because there is material from leakage in the reasons such as corrosion, organic materials can make recirculated water COD significantly raised, these Organic substances can provide nutrition for microorganism, promotes the procreation of microorganism to grow, causes biological clay to endanger. If containing organic acid, S in material2-Deng corrosive substance, fouling and equipment corrosion also can be aggravated. Therefore, in circulation, need the substantial amounts of supplementary water of continuous supplementation (the fresh surface water of general selection or subsoil water), a part is as circulation evaporation loss, the supplementing of air cooling tower windage loss water, and another part is as ensureing that circulating water quality is stable, avoiding because water quality deterioration causes cold exchange device corrosion and scaling and rate of heat exchange to decline and need to be supplemented by the water yield of circulation blowdown. Supplementing in water at these two parts, the magnitude of recruitment as circulation evaporation loss, air cooling tower windage loss water is usually constant, depends primarily on the temperature of environment and the form of air cooling tower; Part II as ensureing that circulating water quality stably needs to be supplemented by the water yield of blood circulation blowdown to be then subject to circulating water quality and the impact on circulating water treatment technology, the content of the concentration of float, antibacterial and microorganism, total solids content, the treatment measures etc. supplementing the source of water and water quality, circulating water quality is taked in recirculated water.
Current circular water treating system mainly adopts and adds the chemical agents such as various types of antisludging agent, corrosion inhibiter, antibacterial in system, and small part water is made the treatment measures such as by-passing filter oil removal, and focus mostly in the exploitation to the chemical agent of circulating water treatment, such as various organic phosphates, energy and Ca2+��Mg2+The chelating agen Quadrafos etc. of complexation. CN1125697A discloses the application in circulation of a kind of biological cleanser and using method thereof, relates generally to material from leakage in a kind of circulation, biological clay, the new removal of bacterium algae and control method;Relate to a kind of biological preparation composite possess inhibition, scale inhibition decontamination, antibacterial multi-functional compound novel water quality stabilizer. CN200510025392.8 discloses a kind of method controlling growth of microorganism in circulation, first in circulation, add the mixture of dodecyl dimethyl benzyl ammonium chloride and isothiazolone, in circulation, then add PAPE. The methods such as above-mentioned addition antibacterial, surfactant and biological enzyme formulation, microbial growth in circulation can be controlled at the dosing initial stage, but microorganism itself has certain toleration and Drug resistance, prolongation over time, the Drug resistance of microorganism strengthens, the pharmaceutical quantities then added can be gradually increased, and expensive medicament certainly will increase operating cost, and medicament is once just become new pollutant after losing efficacy. The biological clay simultaneously killed discharges again COD, the nutrient substance that growth is required is provided to the recirculated water microorganism that band is come in again in cyclic process, so also having biological regrowth, it is impossible to fundamentally solve coming into question of microbial growth and breeding and biological clay. Recirculated water for a certain specific water quality, suitable chemical agent is selected to carry out processing and really can play stable circulation water water quality, anticorrosion, antiscale, kill the effect of microorganism, but to, in circulating water treatment process, still there will be problems described above owing to the feature of the method determines.
The present built circulating water treatment device that sets mostly passes through other filter tank part blowdown, this measure that small part water in circulation is done bypass process, mainly by the filler filled in filter, it is used for retaining float, silt particle, colloid and graininess impurity in removal water, make turbidity at below 10mg/L, maintain circulating water quality by row outside part recirculated water stable simultaneously. US6086772(EP0893412) a kind of method disclosing prevention of water system recirculated water biological pollution, water circulation system is placed ozonator, the ozone of high concentration is produced by ozonator, replace antibacterial such as chlorine etc., complete recirculated water in circulation is biological and microorganism pollution bactericidal action, but this method improve only the problem brought in circulating water quality because of biological pollution, in recirculated water because of organic acid, S2-The problem that the circulating water quality caused Deng corrosive substance etc. worsens is not had an effect substantially.
In sum, owing to bad chemical reaction can be there is between the complexity of water quality, the multiformity of chemical agent, medicament and between medicament and recirculated water unavoidably during use chemical agent, and chemical agent must regularly quantitatively add, grasp the improper deterioration that can accelerate water quality on the contrary, produce opposite effect, simultaneously affiliated chemical agent just became new pollutant after losing efficacy, can not reduce the solids content in recirculated water simultaneously, generally still needs to the outer row of part and processes. Small part water in circulation is done the measure that by-passing filter oil removal processes, also can only alleviate or part solves the biological clay problem that the float in recirculated water is brought, it is impossible to the effectively utilizable material of degrading microorganism. And reach certain treatment effect, it is necessary to control low-down cycles of concentration. In combination with use, while adding chemical agent, partial bypass filters, but also only control low-down cycles of concentration (such as less than 2.0), could effectively maintain the properly functioning of circulation, owing to adopting relatively low cycles of concentration, system needs to discharge substantial amounts of sewage, needs to supplement a large amount of fresh waters in blood circulation simultaneously, this not only causes the waste of great lot of water resources, increases quantity of wastewater effluent, and adds production cost.
Wet oxidation process (wetairoxidation, WAO) refer under uniform temperature (180��320 DEG C) and certain pressure (0.5��20MPa), with the oxygen in air for oxidant, in liquid-phase system, the oxidation operation in waste water is decomposed into the process of inorganic matter or small organic molecule. Owing to being carry out under high temperature, condition of high voltage, required energy consumption is bigger. CWO technology (CatalyticWetAirOxidation, CWAO) it is addition catalyst in traditional wet oxidation system for handling, reduce the activation energy of reaction, thus when not reducing treatment effect, reduce the temperature and pressure of reaction, shorten the time of reaction, improve reaction efficiency. But, the conventional use of catalyst of the method is selective, and when pollutant levels are higher, required temperature and pressure is still significantly high, and containing the Organic substance that numerous species is different with structure in waste water, there is no the high efficiency catalytic wet oxidation catalyst of low power consuming so far.
Summary of the invention
For the deficiencies in the prior art, the invention provides the processing method of a kind of recirculated water. The high COD recirculated water of leakage point in circulation is drawn and utilizes catalytic wet air oxidation to process by the present invention, it is possible to efficiently remove the Organic substance in recirculated water and S2-, water outlet can directly return in circulation after heat exchange, efficiently solves the water pollution issue that material from leakage in circulation causes.
The processing method of recirculated water of the present invention includes following content: draw the high COD recirculated water that this part causes because of material from leakage from circulation, subsequently into CWO reactor for treatment, filling fixed bde catalyst in CWO reactor, described catalyst includes carrier, active metal component and auxiliary agent, wherein with Pt, Pd, Rh, one or several in Ru are active metal component, rare earth metal is auxiliary agent, carrier is with the activated carbon of 150 order��300 orders for core, with amorphous alumina for shell, wherein activated carbon accounts for the 30%��70% of vehicle weight, aluminium oxide accounts for the 30%��70% of vehicle weight, recirculated water after CWO process is discharged into gas-liquid separator and carries out gas-liquid separation, and isolated high-temperature water is for returning in circulation after the water inlet of reacting by heating device.
The present invention determines the recirculated water heat-exchanger rig of material from leakage according to monitoring COD value, draws, at this heat-exchanger rig circulating water outlet, the recirculated water that this part causes high COD, and generally its COD concentration (Cr method, lower same) is at 1000��20000mg/L. In the present invention, the pressure controlling CWO is (gauge pressure, lower same) 0.1��2.0MPa, it is preferred to 0.3��1.2MPa; Temperature is 50��180 DEG C, it is preferred to 80��120 DEG C; Volume space velocity is 0.5��5h-1, it is preferred to 1��3h-1��
The present invention is at under-stream period, it is possible to adopt heater or high temperature heating material to be cooled recirculated water to required temperature; After pending system enters stable phase, high-temperature water warm-up cycle water that gas-liquid separator separates goes out then can be adopted to required temperature, if the temperature needed for CWO can not be reached after preheating, it is possible to adopt heater or high temperature heating material to be cooled to temperature required. Pressure in inventive pipeline can pass through booster pump supercharging, makes recirculated water not vaporize.
Rare earth metal of the present invention is one or more in lanthanum, cerium, praseodymium, neodymium; With the weight of catalyst for benchmark, the content that noble metal is counted with element is for 0.01%��1.0%, and the content that rare earth metal is counted with element is for 1%��15%.
The preparation method of catalytic wet oxidation catalyst of the present invention is: (1) is by 150 order��300 order activated carbon making beating; (2) in amorphous alumina plastic process, the activated carbon serosity that step (1) obtains is introduced; (3) material after the plastic that step (2) obtains carry out aging, filter, washing, dry, obtain catalyst carrier material; (4) carrier material of step (3) gained is made catalyst carrier; (5) impregnated activated metal component and auxiliary agent in the catalyst carrier of step (4) gained, then dry, roasting under inert gas shielding, obtain catalytic wet oxidation catalyst.
Activated carbon property used in the present invention is as follows: specific surface area 500��3000m2/ g, pore volume 0.5��1.8cm3/ g, average pore radius 1��10nm. Activated carbon making beating adopt add water, one or more in low-carbon alcohols are pulled an oar, wherein low-carbon alcohols is carbon number is one or more in the monohydric alcohol of 1��5.
Activated carbon used in the present invention preferably first adopts saccharide to process, and then pulls an oar. Described saccharide is one or more in glucose, sucrose. Described saccharide consumption accounts for the 2% ~ 50% of activated carbon weight, it is preferred to 5% ~ 20%. It is directly mixed with activated carbon by saccharide that saccharide processes activated carbon, or is dissolved in solvent by saccharide and adds activated carbon, solvent therein is water, carbon number be 1 ~ 5 monohydric alcohol in one or more; When saccharide processes activated carbon, its liquid-solid volume ratio is below 10.
In the present invention, CWO needs to pass into air, oxygen or ozone as oxidant. When the temperature of wet oxidation is higher, high-temperature gas heated oxidant to the CWO discharged by gas-liquid separator reacts required temperature, thus reclaiming heat further, avoids the impact on CWO of the cryogenic oxygen agent simultaneously. Gas-liquid separation can adopt pressure reducing mode to isolate the gas in recirculated water, and controlling pressure in gas-liquid separator is 0.1��2.0MPa, reduces steam loss as much as possible. The recirculated water that gas-liquid separator is discharged can carry out heat exchange with treating the recirculated water that wet oxidation processes, and recovery section heat reduces wet oxidation operation energy consumption, and temperature is down to after below 40 DEG C, in return circulation.
In the present invention, the treatment scale of CWO reactor is 1��5t/h. The water yield according to circulation, it is possible to multiple CWO reactor parallel processing is set.
The inventive method is applicable to containing Organic substance and S2-Deng the process of the recirculated water of pollutant, particularly can successfully manage the fluctuation of cycle water system water quality, it is ensured that the operation steady in a long-term of cycle water system.
Compared with prior art, the inventive method has feature highlighted below:
1, when in circulation heat transmission equipment occur in that leakage, there will be circulation Local C OD significantly high, easily cause biological self reproducing, Stickydeposit and cause heat exchanger heat exchange efficiency to decline, blocking and the problem such as equipment corrosion, although this high COD recirculated water accounts for a little part for recirculated water system, along with this strand high COD recirculated water enters circulation, long accumulation also can cause the blowdown flow rate of circulation to increase. Can processing the method for recirculated water in prior art and have that treatment effect is not good, economy is poor and secondary pollution problems, this strand high COD concentration circulating water is directly led out and adopts catalytic wet air oxidation to process by the present invention, will circulation Organic substance in water and S2-Deng being efficiently oxidized to CO2��H2The material such as O and sulfate, reduces the Organic substance in recirculated water, significantly alleviates the problems such as the decline of heat exchanger heat exchange efficiency, blocking and equipment corrosion, is increased without the chemical reagent of other organic or inorganics, will not produce secondary pollution.
2, the temperature and pressure needed for the more conventional catalytic wet oxidation catalyst of the catalyst of the present invention is substantially reduced, and processes energy consumption and operating cost significantly reduces, good economy performance, and high treating effect.
3, utilizing the heat of high-temperature material in circulation, by circulating water heating to reaction temperature, reacted high temperature purification water may be used for heating water inlet, and whole processing procedure does not have the loss of energy. The good economy performance of the present invention, when not affecting normal production, it is possible to efficiently process recirculated water, it is not necessary to increase additional energy, greatly reduce processing cost.
Accompanying drawing explanation
Fig. 1 is the process chart of circulating water treatment method of the present invention.
Detailed description of the invention
The present invention determines the recirculated water heat-exchanger rig of material from leakage according to monitoring point COD value in circulation, the recirculated water that this part causes high COD is drawn at this heat-exchanger rig circulating water outlet, its COD concentration is at 1000��20000mg/L, by heat transmission equipment with high temperature material-heat-exchanging to be cooled or use heater, by circulating water heating to 50��180 DEG C, it is preferred to 80��120 DEG C. Subsequently into CWO reactor, using fixed bde catalyst, volume space velocity is 0.5��5h-1, it is preferred to 1��3h-1. In catalyst oxidation reactor, pass into the oxidant of preheating simultaneously, control reaction pressure 0.1��2.0MPa, it is preferred to 0.3��1.2MPa, carry out catalytic oxidation, by the Organic substance in recirculated water and S2-Etc. being oxidized to CO2��H2The material such as O and sulfate, reacted water outlet is discharged into gas-liquid separator and carries out gas-liquid separation, and the high temperature purification gas separated is for preheated oxidant, after isolated high temperature purification water is used for heating material to be heated, it is cooled to less than 40 DEG C, is then back in circulation.
Commercially available powdery coconut husk charcoal specific surface area 928m used in the present invention2/ g, pore volume 1.0cm3/ g, average pore radius 1.1nm, iodine sorption value 700mg/g, granularity 200 order.
The preparation method of the catalytic wet oxidation catalyst that the present invention adopts is: join in distilled water by 909g Solid aluminum sulfate, and heating simultaneously is also stirred to dissolving, and obtains solution (a). Strong aqua ammonia is added appropriate distilled water diluting into about 10wt% weak ammonia (b). 271g powdery coconut husk charcoal is added mix homogeneously in glucose (34g) aqueous solution, and liquid-solid volume ratio is 3:1, and then add water making beating, obtains activated carbon serosity (c). Take a plastic cans, after tank adding (a) and being heated with stirring to 60 DEG C, open the valve of the container having (b), within controlling 10 minutes, system in tank is added drop-wise to pH=4.0, open the valve of (c) container, continue dropping (b), in controlling 30 minutes, system in tank is added drop-wise to pH=8.0, control the valve of the container of (c), it is ensured that be now added dropwise to complete. Keeping temperature is 60 DEG C, and material in tank aging 1 hour, is filtered by pH=8.0; wash to sulfate radical-free ion, filter, filter cake is dried 10 hours at 110 DEG C; obtain carrier material, then roasting 5 hours under 550 DEG C of conditions under nitrogen protection, pulverize and sieve and obtain powder carrier. Take carrier material 100 grams; contact with the peptization liquid containing nitric acid and form paste; extruded moulding; then dry 10 hours at 110 DEG C; under nitrogen protection under 550 DEG C of conditions after roasting 5 hours, impregnate with the impregnation liquid containing Ru-Ce, then at 110 DEG C dry 10 hours; under nitrogen protection under 550 DEG C of conditions roasting 5 hours, obtain catalyst A.Ru:0.42wt% in catalyst, Ce:9.42wt%, specific surface area 563m2/ g, pore volume: 0.54cm3/ g, side pressure strength: 198N/cm, rate of wear, 0.69wt%, granularity 1.5mm.
Repeat above-mentioned preparation process, without saccharide in plastic process, prepare catalyst B, Ru:0.44wt%, Ce:0.10wt%, specific surface area 538m in catalyst2/ g, pore volume: 0.51cm3/ g, side pressure strength: 175N/cm, rate of wear, 0.84wt%, granularity 1.5mm.
Embodiment 1
Certain chemical plant circulation quantity of circulating water is 800 ton hour, and because material corrosion is big, heat transmission equipment uses through long-time, corrosion failure occurs, causes that material is revealed, and circulation cooling tower outlet COD is 60��150mg/L. By monitoring, find that the recirculated water water outlet COD of indivedual heat exchanger occurring material to reveal reaches 10000��12000mg/L, the amount of this quantity of circulating water about 5��9 ton hour, this part recirculated water is taken out, high-temperature material is utilized to be heated to 120 DEG C by heat exchanger, entering CWO reactor, pass into ozone as oxidant, control pressure is 1.0��1.2MPa. Being filled with catalyst A prepared by the inventive method in catalyst oxidation reactor, air speed is 1h-1. Catalyst oxidation reactor water outlet enters gas-liquid separator, and isolated discharge gas is used for preheated oxidant, and the high-temperature water obtained enters heat exchanger and heats material to be heated. The COD processing Posterior circle water is 60��80mg/L, and circulation cooling tower outlet COD is 40��60mg/L, significantly alleviates circulation and causes the problems such as the decline of heat exchanger heat exchange efficiency, equipment corrosion and blocking because of material from leakage.
Embodiment 2
Certain chemical plant circulation quantity of circulating water is 800 ton hour, and because material corrosion is big, heat transmission equipment uses through long-time, corrosion failure occurs, causes that material is revealed, and circulation cooling tower outlet COD is 60��150mg/L. By monitoring, find that the recirculated water water outlet COD of indivedual heat exchanger occurring material to reveal reaches 10000��12000mg/L, the amount of this quantity of circulating water about 5��9 ton hour, this part recirculated water is taken out, high-temperature material is utilized to be heated to 120 DEG C by heat exchanger, entering CWO reactor, pass into ozone as oxidant, control pressure is 1.0��1.2MPa. Being filled with catalyst B prepared by the inventive method in catalyst oxidation reactor, air speed is 1h-1. Catalyst oxidation reactor water outlet enters gas-liquid separator, and isolated discharge gas is used for preheated oxidant, and the high-temperature water obtained enters heat exchanger and heats material to be heated. The COD processing Posterior circle water is 80��100mg/L, and circulation cooling tower outlet COD is 50��70mg/L, significantly alleviates circulation and causes the problems such as the decline of heat exchanger heat exchange efficiency, equipment corrosion and blocking because of material from leakage.
Embodiment 3
Certain chemical plant circulation quantity of circulating water is 1000 ton hour, and because material corrosion is big, heat transmission equipment uses through long-time, corrosion failure occurs, causes that material is revealed, and circulation cooling tower outlet COD is 35��100mg/L. By monitoring, find that the recirculated water water outlet COD of indivedual heat exchanger occurring material to reveal reaches 5000��7000mg/L, the amount of this quantity of circulating water about 10��15 ton hour, this part recirculated water is taken out, high-temperature material is utilized to be heated to 100 DEG C by heat exchanger, entering CWO reactor, pass into air as oxidant, control pressure is 0.7��0.9MPa.Being filled with catalyst A prepared by the inventive method in catalyst oxidation reactor, air speed is 2h-1. Catalyst oxidation reactor water outlet enters gas-liquid separator, and isolated discharge gas is used for preheated oxidant, and the high-temperature water obtained enters heat exchanger and heats material to be heated. The COD processing Posterior circle water is 60��75mg/L, and circulation cooling tower outlet COD is 25��40mg/L.
Embodiment 4
In certain large-scale petrochemical Water System of Refinery domestic, recirculated water total amount 20,000 ton hour, circulation cooling tower outlet COD is 58��75mg/L. but part heat transmission equipment is revealed due to corrosion failure, occur that a small amount of oil and sulfide containing material enter circulation, by monitoring, find that the recirculated water water outlet COD of indivedual heat exchanger occurring material to reveal reaches 2000��3000mg/L, the easy breed bacteria foundry loam of organic accumulation, the blocking of local circulation water pipeline occurs, sulfide accelerates pipeline, the corrosion of equipment, therefore the recirculated water occurring to reveal heat exchanger is drawn, it is heated to by high-temperature material and is heated to 80 DEG C by heat exchanger, enter catalyst oxidation reactor, pass into air, control pressure is 0.5��0.7MPa. being filled with catalyst B prepared by the inventive method in catalyst oxidation reactor, air speed is 3h-1. Catalyst oxidation reactor water outlet enters gas-liquid separator, and isolated discharge gas is used for preheated oxidant, and the high-temperature water obtained enters heat exchanger and heats material to be heated. The COD processing Posterior circle water is 25��40mg/L, and circulation cooling tower outlet COD is 15��30mg/L.
Claims (13)
1. the processing method of a recirculated water, it is characterized in that including following content: from circulation, draw the high COD recirculated water that this part causes because of material from leakage, subsequently into CWO reactor for treatment, filling fixed bde catalyst in CWO reactor, described catalyst includes carrier, active metal component and auxiliary agent, wherein with Pt, Pd, Rh, one or several in Ru are active metal component, rare earth metal is auxiliary agent, carrier is with the activated carbon of 150 order��300 orders for core, with amorphous alumina for shell, wherein activated carbon accounts for the 30%��70% of vehicle weight, aluminium oxide accounts for the 30%��70% of vehicle weight, recirculated water after CWO process is discharged into gas-liquid separator and carries out gas-liquid separation, and isolated high-temperature water is for returning in circulation after the water inlet of reacting by heating device.
2. method according to claim 1, it is characterised in that: determining the recirculated water heat-exchanger rig of material from leakage according to monitoring COD value, draw, at this heat-exchanger rig circulating water outlet, the recirculated water that this part causes high COD, its COD concentration is at 1000��20000mg/L.
3. method according to claim 1, it is characterised in that: the pressure controlling CWO is 0.1��2.0MPa, and temperature is 50��180 DEG C, and catalyst volume air speed is 0.5��5h-1��
4. method according to claim 3, it is characterised in that: the pressure controlling CWO is 0.3��1.2MPa, and temperature is 80��120 DEG C, and catalyst volume air speed is 1��3h-1��
5. method according to claim 1, it is characterised in that: at under-stream period, employing heater or high temperature heating material to be cooled recirculated water to required temperature; After pending system enters stable phase, adopt the high-temperature water warm-up cycle water that goes out of gas-liquid separator separates to required temperature, if the temperature needed for CWO can not be reached after preheating, then adopt heater or high temperature heating material to be cooled to temperature required.
6. method according to claim 1, it is characterised in that: described rare earth metal is one or more in lanthanum, cerium, praseodymium, neodymium; With the weight of catalyst for benchmark, the content that noble metal is counted with element is for 0.01%��1.0%, and the content that rare earth metal is counted with element is for 1%��15%.
7. the method according to claim 1 or 6, it is characterised in that: the preparation method of described catalyst is: (1) is by 150 order��300 order activated carbon making beating; (2) in amorphous alumina plastic process, the activated carbon serosity that step (1) obtains is introduced; (3) material after the plastic that step (2) obtains carry out aging, filter, washing, dry, obtain catalyst carrier material; (4) carrier material of step (3) gained is made catalyst carrier; (5) impregnated activated metal component and auxiliary agent in the catalyst carrier of step (4) gained, then dry, roasting under inert gas shielding, obtain catalytic wet oxidation catalyst.
8. method according to claim 7, it is characterised in that: the character of described activated carbon is as follows: specific surface area 500��3000m2/ g, pore volume 0.5��1.8cm3/ g, average pore radius 1��10nm.
9. method according to claim 7, it is characterised in that: activated carbon making beating adopt add water, one or more in low-carbon alcohols are pulled an oar, wherein low-carbon alcohols is carbon number is one or more in the monohydric alcohol of 1��5.
10. method according to claim 7, it is characterised in that: activated carbon first adopts saccharide to process, and then pulls an oar.
11. method according to claim 10, it is characterised in that: saccharide is one or more in glucose, sucrose; Saccharide consumption accounts for the 2% ~ 50% of activated carbon weight, it is preferred to 5% ~ 20%.
12. method according to claim 1, it is characterised in that: CWO passes into air, oxygen or ozone as oxidant.
13. method according to claim 1, it is characterised in that: gas-liquid separation adopts pressure reducing mode to isolate the gas in recirculated water, and controlling pressure in gas-liquid separator is 0.1��2.0MPa; Gas-liquid separator discharge recirculated water with treat that the recirculated water that wet oxidation processes carries out heat exchange, recovery section heat, temperature is down to after below 40 DEG C, return circulation in.
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| CN108675433A (en) * | 2018-06-22 | 2018-10-19 | 杭州深瑞水务有限公司 | A kind of multistage air inlet wet oxidation system |
| CN109336332A (en) * | 2018-11-13 | 2019-02-15 | 中石化炼化工程（集团）股份有限公司 | A kind of processing method and organic sewage treatment device suitable for high COD organic sewage |
| CN111573897A (en) * | 2020-05-27 | 2020-08-25 | 新奥科技发展有限公司 | Water purification method of circulating water system |
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