CN105645554B - A kind of processing method of recirculated water - Google Patents
A kind of processing method of recirculated water Download PDFInfo
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- CN105645554B CN105645554B CN201410731101.6A CN201410731101A CN105645554B CN 105645554 B CN105645554 B CN 105645554B CN 201410731101 A CN201410731101 A CN 201410731101A CN 105645554 B CN105645554 B CN 105645554B
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Abstract
The invention discloses a kind of processing methods of recirculated water, the high COD recirculated waters caused by material leakage are drawn from circulation, subsequently into catalytic wet oxidation reactor for treatment, filling fixed bed catalyst in reactor, the catalyst includes carrier, active metal component and auxiliary agent, wherein with Pt, Pd, Rh, one or several kinds in Ru are active metal component, rare earth metal is auxiliary agent, carrier is the activated carbon using the mesh of 150 mesh~300 as core, using amorphous alumina as shell, wherein activated carbon accounts for the 30%~70% of vehicle weight, aluminium oxide accounts for the 30%~70% of vehicle weight；Catalytic wet oxidation treated recirculated water is discharged into gas-liquid separator carries out gas-liquid separation, the high-temperature water isolated after heating response device water inlet for returning in circulation.The present invention can efficiently remove organic matter and S in recirculated water2‑, being discharged after heat exchange directly to return in circulation, efficiently solve water pollution issue caused by material leakage in circulation, and processing energy consumption is relatively low.
Description
Technical field
The invention belongs to environmental protections and industrial energy saving water-saving technology field, and in particular to a kind of processing side of recirculated water
Method.
Background technology
The industrial circulating water system majority in China uses unenclosed construction, easy cooperating microorganisms；And in circulating water
In system, heat transmission equipment uses for a long time, can be because material leakage occur in the reasons such as corrosion, and organic materials can make recirculated water COD bright
Aobvious raising, these organic matters can provide nutrition for microorganism, the procreation of microorganism promoted to grow, biological clay is caused to endanger.
If contain organic acid, S in material2-Corrosive substances are waited, can also aggravate fouling and equipment corrosion.Therefore, in circulation
In, continuous supplementation is needed largely to supplement water（Generally select fresh surface water or underground water）, a part is as circulating water
System evaporation loss, the supplement of air cooling tower windage loss water, another part, which is used as, to be ensured that circulating water quality is stable, avoids disliking because of water quality
Change and cold exchange device corrosion and scaling and rate of heat exchange is caused to decline and need to be supplemented by the water of circulation blowdown.This two
Part supplement water in, the magnitude of recruitment as circulation evaporation loss, air cooling tower windage loss water be usually it is constant, mainly
Depending on the temperature of environment and the form of air cooling tower；And second part stablizes needs by the circulatory system as guarantee circulating water quality
Blowdown water supplement then influenced by circulating water quality and on circulating water treatment technology, as in recirculated water suspended matter it is dense
Degree, bacterium and the content of microorganism, total solids content, the source for supplementing water and water quality arrange the processing that circulating water quality is taken
It applies.
Current circular water treating system mainly uses and various types of antisludging agents, corrosion inhibiter, sterilization is added into system
The chemical agents such as agent and the treatment measures such as by-passing filter oil removal are made to small part water, and focus mostly on to recirculated water
In the exploitation of the chemical agent of reason, such as various organic phosphates, energy and Ca2+、Mg2+Chelating agent Quadrafos of complexing etc..
CN1125697A discloses application and its application method of a kind of biological cleanser in circulation, relates generally to one kind and follows
Material leakage, biological clay, the new removal of bacterium algae and control method in ring water system；It is related to a kind of being compounded with biological agent
Have inhibition, scale inhibition decontamination, antibacterial multi-functional compound novel water quality stabilizer.CN200510025392.8 discloses one kind
The method that microorganism growth is controlled in circulation, adds in chlorination dodecyl dimethyl benzyl first in circulation
The mixture of base ammonium and isothiazolinone, then adds in Polyol Phosphate in circulation.Above-mentioned addition fungicide, table
The methods of face activating agent and biological enzyme formulation, dosing initial stage can in control loop water system microorganism growth, it is but micro-
Biology itself has certain tolerance and drug resistance, with the extension of time, the drug resistance enhancing of microorganism, then added
Pharmaceutical quantities can gradually increase, and expensive medicament certainly will increase operating cost, and medicament is become after failure as new pollutant.Together
When the biological clay killed release COD again, provide growth to the recirculated water microorganism that band is come in again in cyclic process
Required nutriment, so also having biological regrowth, it is impossible to fundamentally solve the growth of microorganism and breeding and life
Object foundry loam is led to the problem of.For the recirculated water of a certain specific water quality, suitable chemical agent is selected to be handled and really can
Play the role of stable circulating water quality, anti-corrosion, antiscale, kill microorganism, but during to circulating water treatment, due to the party
The characteristics of method, which determines, still will appear problems described above.
The present circulating water treatment device of construction is this to few in circulation mostly by the blowdown of other filter tank part
Part water does the measure of bypass processing, mainly using the filler filled in filter, for retaining suspended matter, mud in water removal
Sand, colloid and graininess impurity make turbidity in 10mg/L hereinafter, maintaining circulating water quality by being arranged outside the recirculated water of part simultaneously
Stablize.US6086772（EP0893412）A kind of method of pre- waterproof system recirculated water biological pollution is disclosed, in water cyclic system
Ozone generator is placed in system, the ozone of high concentration is generated by ozone generator, instead of fungicide such as chlorine etc., is completed to following
The bactericidal effect of aquatic organism and microbial contamination is recycled in ring water system, but this method is improved only in circulating water quality because of life
Object pollution caused by problem, in recirculated water because of organic acid, S2-Circulating water quality deteriorates caused by waiting corrosive substances etc.
Problem is not had an effect substantially.
In conclusion using due to water quality during chemical agent complexity, the diversity of chemical agent, between medicament and medicine
Undesirable chemical reaction can inevitably occur between agent and recirculated water, and chemical agent must periodically quantify addition, it is improper to grasp
It can accelerate the deterioration of water quality instead, generate opposite effect, while be become after the chemical agent failure added in as new pollution
Object, while the solid content in recirculated water cannot be reduced, the outer row's processing in part is still needed under normal circumstances.To few in circulation
Part water makees the measure of by-passing filter oil removal processing, and the suspended matter that can only also alleviate or partly solve in recirculated water is brought
Biological clay problem, it is impossible to effective utilizable substance of degrading microorganism.And reach certain treatment effect, need
Control low-down cycles of concentration.The two is used in combination, and partial bypass filters while chemical agent is added, but also only controls
Make low-down cycles of concentration（Such as less than 2.0）, the normal operation of circulation could be effectively maintained, it is relatively low due to using
Cycles of concentration, system needs to discharge a large amount of sewage, while need to supplement a large amount of fresh waters into the circulatory system, this is not only caused
The waste of great lot of water resources increases quantity of wastewater effluent, and increases production cost.
Wet oxidation process（Wet air oxidation, WAO）Refer in certain temperature（180~320 DEG C）And certain pressure
（0.5~20MPa）Under, using the oxygen in air as oxidant, in liquid-phase system, the oxidation operation in waste water is decomposed into
The process of inorganic matter or small organic molecule.Due to being carried out under high temperature, condition of high voltage, required energy consumption is larger.Catalytic wet
Oxidation technology（Catalytic Wet Air Oxidation, CWAO）It is to add in urge in traditional wet oxidation system for handling
Agent reduces the activation energy of reaction, so as in the case where not reducing treatment effect, reduce the temperature and pressure of reaction, shortens
The time of reaction improves reaction efficiency.But the conventional use of catalyst of this method is selective, it is higher in pollutant concentration
When, required temperature and pressure is still very high, and there is no so far containing the organic matter that numerous species are different with structure in waste water
The efficient catalytic wet oxidation catalyst of low power consuming.
Invention content
In view of the deficiencies of the prior art, the present invention provides a kind of processing methods of recirculated water.The present invention is by circulating water
The high COD recirculated waters of leakage point are drawn and are handled using catalytic wet air oxidation in system, can efficiently remove in recirculated water
Organic matter and S2-, being discharged after heat exchange directly to return in circulation, efficiently solve material in circulation
Water pollution issue caused by leakage.
The processing method of recirculated water of the present invention includes following content：The part is drawn from circulation because of material leakage
Caused high COD recirculated waters subsequently into catalytic wet oxidation reactor for treatment, are loaded in catalytic wet oxidation reactor and are fixed
Bed catalyst, the catalyst include carrier, active metal component and auxiliary agent, wherein with one kind in Pt, Pd, Rh, Ru or
Several rare earth metal is auxiliary agent for active metal component, and carrier is using the activated carbon of the mesh of 150 mesh~300 as core, with amorphous
Change aluminium is shell, and wherein activated carbon accounts for the 30%~70% of vehicle weight, and aluminium oxide accounts for the 30%~70% of vehicle weight；Catalytic wet oxygen
Changing treated, recirculated water be discharged into that gas-liquid separator carries out gas-liquid separation, after the high-temperature water isolated is for heating response device water inlet
It returns in circulation.
The present invention determines the recirculated water heat-exchanger rig of material leakage according to monitoring COD value, goes out in the heat-exchanger rig recirculated water
Mouth, which draws this part, leads to the recirculated water of high COD, its general COD concentration（Cr methods, similarly hereinafter）In 1000~20000mg/L.This hair
In bright, the pressure for controlling catalytic wet oxidation is（Gauge pressure, similarly hereinafter）0.1~2.0MPa, preferably 0.3~1.2MPa；Temperature is
50~180 DEG C, preferably 80~120 DEG C；Volume space velocity is 0.5~5h- 1, preferably 1~3 h- 1。
Heater or high temperature material heat cycles water to be cooled may be used to required temperature in under-stream period in the present invention
Degree；After pending system enters stationary phase, then high-temperature water warm-up cycle water that gas-liquid separator separates go out may be used to required
The temperature wanted, if temperature needed for catalytic wet oxidation cannot be reached after preheating, may be used heater or high temperature treat it is cold
But material is heated to required temperature.Pressure in inventive pipeline can be pressurized by booster pump, and recirculated water is made not vaporize.
Rare earth metal of the present invention is lanthanum, one or more in cerium, praseodymium, neodymium；On the basis of the weight of catalyst,
The content of noble metal based on the element is 0.01%~1.0%, and the content of rare earth metal based on the element is 1%~15%.
The preparation method of catalytic wet oxidation catalyst of the present invention is：（1）By the mashing of the mesh activated carbon of 150 mesh~300；（2）
Step is introduced during amorphous alumina plastic（1）Obtained activated carbon slurries；（3）Step（2）After obtained plastic
Material carries out aging, is filtered, washed, dries, and obtains catalyst carrier material；（4）By step（3）The carrier material of gained is made
Catalyst carrier；（5）Step（4）Active metal component and auxiliary agent are impregnated in the catalyst carrier of gained, is then dried, in inertia
It is roasted under gas shield, obtains catalytic wet oxidation catalyst.
Activated carbon property used in the present invention is as follows：500~3000m of specific surface area2/ g, hole hold 0.5~1.8cm3/ g,
1~10nm of average pore radius.Activated carbon mashing using using plus water, one or more in low-carbon alcohols be beaten, wherein low
Carbon alcohol is one or more in the monohydric alcohol that carbon atom number is 1~5.
Activated carbon used in the present invention is preferably first handled using carbohydrate, is then beaten.The carbohydrate is grape
It is one or more in sugar, sucrose.The carbohydrate dosage accounts for the 2% ~ 50% of activated carbon weight, preferably 5% ~ 20%.Carbohydrate processing
Activated carbon is that carbohydrate is directly mixed with activated carbon or carbohydrate is dissolved in solvent to add activated carbon, and solvent therein is
It is one or more in water, the monohydric alcohol that carbon atom number is 1 ~ 5；When carbohydrate handles activated carbon, liquid consolidates volume ratio below 10.
In the present invention, catalytic wet oxidation needs to be passed through air, oxygen or ozone as oxidant.When wet oxidation
Temperature is higher, reacts required temperature by the high-temperature gas heated oxidant that gas-liquid separator is discharged to catalytic wet oxidation,
So as to further recycle heat, while avoid influence of the cryogenic oxygen agent to catalytic wet oxidation.Gas-liquid separation, which may be used, to be subtracted
Pressure mode isolates the gas in recirculated water, and it is 0.1~2.0MPa to control pressure in gas-liquid separator, reduces water as far as possible and steams
Gas loses.The recirculated water of gas-liquid separator discharge can exchange heat with treating the recirculated water of wet oxidation processing, recovery section heat
Amount reduces wet oxidation operation energy consumption, after temperature is down to less than 40 DEG C, returns in circulation.
In the present invention, the treatment scale of catalytic wet oxidation reactor is 1~5t/h.According to the water of circulation,
Multiple catalytic wet oxidation reactor parallel processings can be set.
The method of the present invention is suitable for containing organic matter and S2-The processing of the recirculated water of pollutants is waited, can particularly there is effect
Fluctuation to cycle water system water quality ensures the operation steady in a long-term of cycle water system.
Compared with prior art, the method for the present invention has following prominent characteristics：
1st, when in circulation heat transmission equipment occur leakage, it may appear that circulation Local C OD is very high, easily makes
Into biological self reproducing, Stickydeposit and lead to problems such as heat exchanger heat exchange efficiency decline, block and equipment corrosion, although this height
COD recirculated waters account for a seldom part for recirculated water system, as this strand high COD recirculated waters enter circulation, for a long time
Accumulation can also cause the blowdown flow rate of circulation to increase.It in the prior art can there are treatment effects in the method for processing cycle water
Bad, economy is poor and this strand high COD concentration circulating water is directly led out and uses catalysis by secondary pollution problems, the present invention
Wet oxidation process is handled, by cycle Organic substance in water and S2-Deng being efficiently oxidized to CO2、H2The substances such as O and sulfate, drop
Organic matter in low recirculated water alleviates heat exchanger heat exchange efficiency and declines, blocks and the problems such as equipment is corroded, significantly without increasing
Add the chemical reagent of other organic or inorganics, secondary pollution will not be generated.
2nd, the temperature and pressure needed for the more conventional catalytic wet oxidation catalyst of catalyst of the invention substantially reduces, and handles
Energy consumption and operating cost significantly reduce, good economy performance, and high treating effect.
3rd, the heat of the high-temperature material in circulation, by circulating water heating to reaction temperature, the height after reaction are utilized
Warm purified water can be used for heating water inlet, and entire processing procedure does not have the loss of energy.The good economy performance of the present invention, is not influencing
In the case of normal production, it can not need to increase additional energy, greatly reduce processing cost with efficient process recirculated water.
Description of the drawings
Fig. 1 is the process flow chart of circulating water treatment method of the present invention.
Specific embodiment
The present invention determines the recirculated water heat-exchanger rig of material leakage according to monitoring point COD value in circulation, is changed at this
Thermal circulating water outlet, which draws this part, leads to the recirculated water of high COD, and COD concentration is in 1000~20000mg/L, by changing
Hot equipment and high temperature material-heat-exchanging to be cooled or using heater, by circulating water heating to 50~180 DEG C, preferably 80~
120℃.Subsequently into catalytic wet oxidation reactor, using fixed bed catalyst, volume space velocity is 0.5~5h- 1, preferably 1
~3h- 1.The oxidant of preheating is passed through into catalyst oxidation reactor simultaneously, controls 0.1~2.0MPa of reaction pressure, preferably
0.3~1.2MPa carries out catalytic oxidation, by the organic matter and S in recirculated water2-Etc. being oxidized to CO2、H2O and sulfate
Substances are waited, the water outlet after reaction is discharged into gas-liquid separator and carries out gas-liquid separation, and the high temperature purification gas separated is used to preheat oxygen
Agent after the high temperature purification water isolated is for heating material to be heated, is cooled to 40 DEG C hereinafter, being then back to circulation
In.
Commercially available powdery coconut husk charcoal specific surface area 928m used in the present invention2/ g, hole hold 1.0cm3/ g, average pore radius
1.1nm, iodine sorption value 700mg/g, 200 mesh of granularity.
The preparation method for the catalytic wet oxidation catalyst that the present invention uses for：909g Solid aluminum sulfates are added to distillation
It in water, while heats and stirs to dissolving, obtain solution (a).Concentrated ammonia liquor is added in into appropriate distilled water and is diluted to the dilute ammonia of about 10wt%
Water (b).271g powderies coconut husk charcoal is added in into glucose（34g）It is uniformly mixed in aqueous solution, it is 3 that liquid, which consolidates volume ratio,:1, Ran Houjia
Water is beaten, and obtains activated carbon slurries (c).A plastic cans is taken, after (a) is added in tank and is heated with stirring to 60 DEG C, opening has (b)
The valve of container controls and system in tank is added drop-wise to pH=4.0 within 10 minutes, opens the valve of (c) container, continue to be added dropwise
(b), it controls in 30 minutes and system in tank is added drop-wise to pH=8.0, control the valve of the container of (c), guarantee is added dropwise to complete at this time.
It is 60 DEG C to keep temperature, and material in tank is filtered by pH=8.0, aging 1 hour, washs to sulfate radical-free ion, filters, will
Filter cake is 10 hours dry at 110 DEG C, obtains carrier material, is then roasted 5 hours under the conditions of 550 DEG C under nitrogen protection,
It pulverizes and sieves to obtain powder carrier.Take 100 grams of carrier material, contact to form paste with the peptization liquid containing nitric acid, extrusion into
Type, it is then 10 hours dry at 110 DEG C, after being roasted 5 hours under the conditions of 550 DEG C under nitrogen protection, with the dipping containing Ru-Ce
Liquid impregnates, then 10 hours dry at 110 DEG C, is roasted 5 hours under the conditions of 550 DEG C under nitrogen protection, obtains catalyst A.
Ru in catalyst：0.42wt%, Ce：9.42wt%, 563 m of specific surface area2/ g, Kong Rong：0.54cm3/ g, side pressure strength：198N/
Cm, rate of wear, 0.69wt%, granularity 1.5mm.
Above-mentioned preparation process is repeated, the not adding carbohydrate during plastic is made catalyst B, Ru in catalyst：
0.44wt%, Ce：0.10wt%, specific surface area 538m2/ g, Kong Rong：0.51cm3/ g, side pressure strength：175 N/cm, rate of wear,
0.84 wt%, granularity 1.5mm.
Embodiment 1
Certain chemical plant circulation quantity of circulating water is 800 ton hours, and because material corrosion is big, heat transmission equipment is through long
Time uses, and corrosion failure occurs, material is caused to be revealed, and circulation cooling tower outlet COD is 60~150mg/L.Pass through
Monitoring finds that the recirculated water water outlet COD of indivedual heat exchangers that material leakage occurs reaches 10000~12000mg/L, the recirculated water
The amount of about 5~9 ton hours is measured, which is taken out, 120 DEG C are heated to by heat exchanger using high-temperature material,
Into catalytic wet oxidation reactor, ozone is passed through as oxidant, control pressure is 1.0~1.2MPa.Catalytic oxidation
The catalyst A, air speed 1h of the method for the present invention preparation are filled in device- 1.Catalyst oxidation reactor water outlet enters gas-liquid separation
Device, the discharge gas isolated are used for preheated oxidant, and obtained high-temperature water enters heat exchanger and heats material to be heated.It is followed after processing
The COD of ring water is 60~80mg/L, and circulation cooling tower outlet COD is 40~60mg/L, alleviates circulating water significantly
System is because material leakage leads to problems such as heat exchanger heat exchange efficiency decline, equipment is corroded and is blocked.
Embodiment 2
Certain chemical plant circulation quantity of circulating water is 800 ton hours, and because material corrosion is big, heat transmission equipment is through long
Time uses, and corrosion failure occurs, material is caused to be revealed, and circulation cooling tower outlet COD is 60~150mg/L.Pass through
Monitoring finds that the recirculated water water outlet COD of indivedual heat exchangers that material leakage occurs reaches 10000~12000mg/L, the recirculated water
The amount of about 5~9 ton hours is measured, which is taken out, 120 DEG C are heated to by heat exchanger using high-temperature material,
Into catalytic wet oxidation reactor, ozone is passed through as oxidant, control pressure is 1.0~1.2MPa.Catalytic oxidation
The catalyst B, air speed 1h of the method for the present invention preparation are filled in device- 1.Catalyst oxidation reactor water outlet enters gas-liquid separation
Device, the discharge gas isolated are used for preheated oxidant, and obtained high-temperature water enters heat exchanger and heats material to be heated.It is followed after processing
The COD of ring water is 80~100mg/L, and circulation cooling tower outlet COD is 50~70mg/L, alleviates circulating water significantly
System is because material leakage leads to problems such as heat exchanger heat exchange efficiency decline, equipment is corroded and is blocked.
Embodiment 3
Certain chemical plant circulation quantity of circulating water is 1000 ton hours, and because material corrosion is big, heat transmission equipment is through long
Time uses, and corrosion failure occurs, material is caused to be revealed, and circulation cooling tower outlet COD is 35~100mg/L.Pass through
Monitoring finds that the recirculated water water outlet COD of indivedual heat exchangers that material leakage occurs reaches 5000~7000mg/L, the quantity of circulating water
The part recirculated water is taken out, 100 DEG C is heated to by heat exchanger using high-temperature material by the amount of about 10~15 ton hours,
Into catalytic wet oxidation reactor, air is passed through as oxidant, control pressure is 0.7~0.9MPa.Catalytic oxidation
The catalyst A, air speed 2h of the method for the present invention preparation are filled in device- 1.Catalyst oxidation reactor water outlet enters gas-liquid separation
Device, the discharge gas isolated are used for preheated oxidant, and obtained high-temperature water enters heat exchanger and heats material to be heated.It is followed after processing
The COD of ring water is 60~75mg/L, and circulation cooling tower outlet COD is 25~40mg/L.
Embodiment 4
In certain domestic large-scale petrochemical Water System of Refinery, 20,000 ton hour of water inventory, circulation cold water are recycled
Tower outlet COD is 58~75mg/L.But part heat transmission equipment is since corrosion failure is revealed, occur a small amount of oil and sulfide containing material into
Enter circulation, by monitoring, it is found that the recirculated waters water outlet COD of indivedual heat exchangers that materials leakage occurs reach 2000~
Bacterium foundry loam is easily grown in 3000mg/L, the accumulation of organic matter, the blocking of local circulation water pipeline occurs, and sulfide accelerates pipe
The corrosion of line, equipment, thus draw occur leakage heat exchanger recirculated water, by high-temperature material be heated to by heat exchanger by its
80 DEG C are heated to, into catalyst oxidation reactor, is passed through air, control pressure is 0.5~0.7MPa.In catalyst oxidation reactor
It is filled with the catalyst B, air speed 3h of the method for the present invention preparation- 1.Catalyst oxidation reactor water outlet enters gas-liquid separator, point
The discharge gas separated out is used for preheated oxidant, and obtained high-temperature water enters heat exchanger and heats material to be heated.Handle Posterior circle water
COD for 25~40mg/L, circulation cooling tower outlet COD is 15~30mg/L.
Claims (12)
1. a kind of processing method of recirculated water, it is characterised in that including following content：Drawn from circulation the part because
High COD recirculated waters caused by material leakage, subsequently into catalytic wet oxidation reactor for treatment, in catalytic wet oxidation reactor
Fixed bed catalyst is loaded, the catalyst includes carrier, active metal component and auxiliary agent, wherein in Pt, Pd, Rh, Ru
One or several kinds are active metal component, and rare earth metal is auxiliary agent, and rare earth metal is lanthanum, cerium, praseodymium, one kind in neodymium or more
Kind；Carrier be using the activated carbon of the mesh of 150 mesh~300 as core, using amorphous alumina as shell, wherein activated carbon accounts for vehicle weight
30%~70%, aluminium oxide accounts for the 30%~70% of vehicle weight；Treated that recirculated water is discharged into gas-liquid separator for catalytic wet oxidation
Gas-liquid separation is carried out, the high-temperature water isolated is in return circulation after heating response device water inlet；The catalyst
Preparation method is：（1）The mesh activated carbon of 150 mesh~300 first using carbohydrate is handled, is then beaten；（2）In amorphous
Step is introduced during aluminium plastic（1）Obtained activated carbon slurries；（3）Step（2）Material after obtained plastic carry out aging,
It is filtered, washed, dries, obtain catalyst carrier material；（4）By step（3）Catalyst carrier is made in the carrier material of gained；
（5）Step（4）Active metal component and auxiliary agent are impregnated in the catalyst carrier of gained, is then dried, under inert gas shielding
Roasting, obtains catalytic wet oxidation catalyst；Wherein, carbohydrate processing activated carbon be carbohydrate is directly mixed with activated carbon or
Carbohydrate is dissolved in solvent and adds activated carbon, one kind in the monohydric alcohol that solvent therein is water, carbon atom number is 1~5 or
It is a variety of.
2. according to the method described in claim 1, it is characterized in that：Determine that the recirculated water of material leakage changes according to monitoring COD value
Thermal, drawing the part in the heat-exchanger rig circulating water outlet leads to the recirculated water of high COD, COD concentration 1000~
20000mg/L。
3. according to the method described in claim 1, it is characterized in that：The pressure for controlling catalytic wet oxidation is 0.1~2.0MPa,
Temperature is 50~180 DEG C, and catalyst volume air speed is 0.5~5h- 1。
4. according to the method described in claim 3, it is characterized in that：The pressure for controlling catalytic wet oxidation is 0.3~1.2MPa,
Temperature is 80~120 DEG C, and catalyst volume air speed is 1~3h- 1。
5. according to the method described in claim 1, it is characterized in that：In under-stream period, using heater or high temperature object to be cooled
Expect heat cycles water to required temperature；After pending system enters stationary phase, the high temperature that is gone out using gas-liquid separator separates
Water warm-up cycle water is to required temperature, if cannot reach the temperature needed for catalytic wet oxidation after preheating, then uses and adds
Hot device or high temperature material to be cooled are heated to required temperature.
6. according to the method described in claim 1, it is characterized in that：On the basis of the weight of catalyst, noble metal is based on the element
Content for 0.01%~1.0%, the content of rare earth metal based on the element is 1%~15%.
7. according to the method described in claim 1, it is characterized in that：The property of the activated carbon is as follows：Specific surface area 500~
3000m2/ g, hole hold 0.5~1.8cm3/ g, 1~10nm of average pore radius.
8. according to the method described in claim 1, it is characterized in that：Activated carbon mashing using plus water, one kind in low-carbon alcohols or
A variety of to be beaten, wherein low-carbon alcohols are one or more in the monohydric alcohol that carbon atom number is 1~5.
9. according to the method described in claim 1, it is characterized in that：Carbohydrate is glucose, one or more in sucrose；Carbohydrate
Dosage accounts for the 2% ~ 50% of activated carbon weight.
10. according to the method described in claim 9, it is characterized in that：Carbohydrate dosage accounts for the 5% ~ 20% of activated carbon weight.
11. according to the method described in claim 1, it is characterized in that：Catalytic wet oxidation is passed through air, oxygen or ozone and makees
For oxidant.
12. according to the method described in claim 1, it is characterized in that：Gas-liquid separation is isolated using pressure reducing mode in recirculated water
Gas, control gas-liquid separator in pressure be 0.1~2.0MPa；The recirculated water of gas-liquid separator discharge is with treating at wet oxidation
The recirculated water of reason exchanges heat, recovery section heat, after temperature is down to less than 40 DEG C, returns in circulation.
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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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