CN114804408A - Method and device for treating and recycling water washing waste liquid of power plant gas turbine - Google Patents
Method and device for treating and recycling water washing waste liquid of power plant gas turbine Download PDFInfo
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- CN114804408A CN114804408A CN202210364203.3A CN202210364203A CN114804408A CN 114804408 A CN114804408 A CN 114804408A CN 202210364203 A CN202210364203 A CN 202210364203A CN 114804408 A CN114804408 A CN 114804408A
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- 239000007788 liquid Substances 0.000 title claims abstract description 102
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 84
- 239000002699 waste material Substances 0.000 title claims abstract description 67
- 238000005406 washing Methods 0.000 title claims abstract description 55
- 238000004064 recycling Methods 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000003756 stirring Methods 0.000 claims abstract description 117
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 67
- 238000010438 heat treatment Methods 0.000 claims abstract description 20
- 238000004062 sedimentation Methods 0.000 claims description 63
- 239000007800 oxidant agent Substances 0.000 claims description 34
- 230000001590 oxidative effect Effects 0.000 claims description 31
- 239000007789 gas Substances 0.000 claims description 30
- 239000000701 coagulant Substances 0.000 claims description 29
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- 238000001816 cooling Methods 0.000 claims description 17
- 239000003463 adsorbent Substances 0.000 claims description 15
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 12
- 239000008394 flocculating agent Substances 0.000 claims description 12
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 11
- 229920002401 polyacrylamide Polymers 0.000 claims description 11
- 239000006228 supernatant Substances 0.000 claims description 11
- 230000015271 coagulation Effects 0.000 claims description 10
- 238000005345 coagulation Methods 0.000 claims description 10
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 8
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 8
- 239000003607 modifier Substances 0.000 claims description 7
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 6
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 6
- 238000002485 combustion reaction Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 5
- 230000001112 coagulating effect Effects 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 238000013019 agitation Methods 0.000 claims description 3
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 claims description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 2
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 2
- 239000000292 calcium oxide Substances 0.000 claims description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 2
- 229960002089 ferrous chloride Drugs 0.000 claims description 2
- 239000011790 ferrous sulphate Substances 0.000 claims description 2
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 2
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 claims description 2
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 2
- 229910017604 nitric acid Inorganic materials 0.000 claims description 2
- 235000006408 oxalic acid Nutrition 0.000 claims description 2
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 2
- 239000002535 acidifier Substances 0.000 claims 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 9
- 239000000498 cooling water Substances 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 3
- 238000004065 wastewater treatment Methods 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 abstract description 2
- 238000010168 coupling process Methods 0.000 abstract description 2
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- 238000001179 sorption measurement Methods 0.000 description 7
- 229910052799 carbon Inorganic materials 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 239000002351 wastewater Substances 0.000 description 6
- SURQXAFEQWPFPV-UHFFFAOYSA-L iron(2+) sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Fe+2].[O-]S([O-])(=O)=O SURQXAFEQWPFPV-UHFFFAOYSA-L 0.000 description 5
- 230000035484 reaction time Effects 0.000 description 5
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
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- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- 239000010775 animal oil Substances 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 229910052785 arsenic Inorganic materials 0.000 description 2
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 229910001448 ferrous ion Inorganic materials 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
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- 230000003197 catalytic effect Effects 0.000 description 1
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- 238000005260 corrosion Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a method and a device for treating and recycling washing waste liquid of a power plant gas turbine, belonging to the technical field of waste water treatment. The invention relates to a treatment and recycling device, which comprises a first stirring tank, an oxidation reaction tank and a second stirring tank which are sequentially connected; the second stirring tank is connected with the treatment module and the recycling module in parallel; the oxidation reaction tank is provided with a steam heating layer; the invention provides a treatment and recycling coupling device for washing waste liquid of a gas turbine of a power plant, which comprises a washing waste liquid treatment module and a recycling module, and can be conveniently selected by the power plant according to actual requirements, so that on one hand, the washing waste liquid can be treated and discharged after reaching the standard, and on the other hand, the washing waste liquid can be used as circulating cooling water, and the water demand of the power plant under the condition that the total water consumption is controlled is reduced; the method provided by the invention has good process effect and high removal rate of COD in the water washing waste liquid of the gas turbine of the power plant, the COD concentration in the effluent discharged by the treatment module after reaching the standard is lower than 500mg/L, and the COD concentration in the effluent circulated by the circulation module after reaching the standard is lower than 60 mg/L.
Description
Technical Field
The invention belongs to the technical field of wastewater treatment, and particularly relates to a method and a device for treating and recycling power plant gas turbine washing waste liquid.
Background
The gas turbine is a rotary impeller type heat engine, and uses continuously flowing gas as working medium to drive the impeller to rotate at high speed, so as to convert the energy of fuel into useful work. Because the compressor operates in an open environment and is influenced by environmental factors, impurities can be accumulated on the blades of the compressor to form scale deposit, so that the efficiency of the compressor is reduced, and the blades are easy to generate fatigue cracks. In order to ensure the cleanness of the gas compressor, the gas turbine is provided with a water washing device, and blades of the gas compressor are periodically washed and cleaned by water to remove impurities and eliminate hidden dangers. The waste liquid after cleaning is called as the water cleaning waste liquid of the gas turbine, and the main pollutants of the waste liquid have the characteristics of solubility, difficult degradation, easy foaming, extremely small biodegradability, high Chemical Oxygen Demand (COD) and the like. In the prior art, the traditional biological method has the characteristics of high economical efficiency and small occupied area, but microorganisms cannot degrade the washing waste liquid of the fuel machine. The waste liquid after the water washing of the combustion engine is directly discharged into a sewage pipeline for sewage treatment, the sewage treatment cost for a power plant is quite large, and the water washing waste liquid is not fully utilized.
Chinese patent CN212494143U discloses a system for recycling waste water from washing of a gas turbine. The technical scheme is as follows: including gas turbine, effluent water sump, boiler cooling pond, circulating water pond, cooling tower and steam turbine coagulator, the gas turbine is equipped with pipe connection to effluent water sump, is provided with the pipeline intercommunication in the effluent water sump to boiler cooling pond, is provided with pipe connection to circulating water pond in the boiler cooling pond, is provided with pipe connection to cooling tower in the circulating water pond, and the cooling tower passes through pipe connection to steam turbine coagulator, and the steam turbine coagulator passes through backflow pipeline and is connected to circulating water pond. However, the waste water from the washing of the gas turbine is directly introduced into a cooling tower and a condenser without being treated, new impurities are brought in the waste water, so that pollution is caused, and the waste water from the washing of the gas turbine has high chemical oxygen demand, so that the quality of effluent water cannot reach the standard.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a method and a device for simultaneously treating and recycling the washing waste liquid.
In order to achieve the purpose, the invention adopts the technical scheme that: a treatment and recycling device for washing waste liquid of a power plant gas turbine comprises a first stirring tank, an oxidation reaction tank and a second stirring tank which are sequentially connected; the second stirring tank is connected with the treatment module and the recycling module in parallel; the oxidation reaction tank is provided with a steam heating layer.
The device for treating and recycling the washing waste liquid of the power plant gas turbine, provided by the invention, simultaneously comprises the wastewater treatment module and the recycling module, and has the effects of treatment and cyclic utilization; in addition, the washing waste liquid is firstly introduced into the first stirring tank to adjust the pH value, then the first oxidant and the second oxidant are continuously introduced into the first stirring tank, the added oxidant can reduce the COD value of the washing waste liquid when being introduced into the oxidation reaction tank, and then the liquid after oxidation is discharged into the second stirring tank to further adjust the pH value so as to be subjected to coagulation sedimentation or coagulation adsorption sedimentation subsequently, so that the washing waste liquid reaches the discharge standard or the recycling standard; meanwhile, the steam heating layer is arranged on the part of the oxidation reaction tank in the device, and the steam in the steam heating layer is connected with the steam of the power plant, so that on one hand, the liquid in the oxidation reaction tank can be heated, the oxidation reaction in the oxidation reaction tank can be promoted, on the other hand, the steam discharged by the power plant can be utilized, and the purposes of reasonably utilizing resources and saving energy sources are achieved.
As a preferred embodiment of the treatment and reuse device, the steam heating layer is positioned at the outer layer of the oxidation reaction tank; the left side and the right side of the steam heating layer are respectively provided with a steam inlet and a steam outlet.
According to the invention, the steam heating layer is arranged on the outer layer of the oxidation reaction tank, and the steam inlet and the steam outlet are correspondingly arranged, so that steam discharged by a power plant can be effectively utilized for heating, the heat reuse rate is improved, and the integral operation is simple, convenient and environment-friendly.
As a preferred embodiment of the treatment and recycling device of the present invention, the treatment module comprises a first sedimentation tank; the recycling module comprises a second sedimentation tank.
As a preferred embodiment of the treatment and reuse apparatus of the present invention, the bottom of the first sedimentation tank and the second sedimentation tank include a sewage pump.
According to the invention, a first coagulant and a first flocculating agent are added into a first sedimentation tank or a second coagulant, a second flocculating agent and an adsorbent are simultaneously added into a second sedimentation tank, so that liquid entering the sedimentation tank is settled and separated, and the purpose of standard discharge after treatment or the purpose of recycling after treatment is achieved for supernatant; and the sediment is removed by a sewage pump at the bottom.
As a preferred embodiment of the treatment and reuse apparatus of the present invention, the apparatus further comprises a preheater; the preheater is arranged at the bottom of the first stirring tank, a water inlet of the preheater is connected with a water outlet of the oxidation reaction tank, and a water outlet of the preheater is connected with the second stirring tank.
According to the invention, the preheater is arranged at the bottom of the first stirring tank, so that on one hand, the liquid flowing out of the oxidation reaction tank can be cooled, and on the other hand, the liquid in the first stirring tank can be preheated, thus the energy is efficiently utilized, meanwhile, the heating time in the oxidation reaction tank can be shortened, and the reaction efficiency is improved.
As a preferred embodiment of the treatment and reuse apparatus of the present invention, the apparatus further comprises a first acid-base modifier doser, a first oxidant doser and a second oxidant doser connected to the first agitation tank; a second acid-base regulator doser connected with the second stirring tank; a first coagulant doser and a first flocculant doser which are connected with the first sedimentation tank; and the second coagulant doser, the second flocculant doser and the third oxidant doser are connected with the second sedimentation tank.
Through linking to each other with first stirring pond, second stirring pond, first sedimentation tank and second sedimentation tank respectively with the doser of difference, can conveniently add the medicine in the use, improve the suitability of operation, also can improve the efficiency of handling.
As a preferred embodiment of the treatment and recycling device of the present invention, the first stirring tank, the oxidation reaction tank, the second stirring tank, the first sedimentation tank and the second sedimentation tank are all provided with stirring devices.
In addition, the invention also provides a method for treating and recycling the water washing waste liquid of the power plant combustion engine, which comprises the following steps:
(1) introducing the power plant gas turbine washing waste liquid into a first sedimentation tank to adjust the pH value to 2-4, then sequentially adding a first oxidant and a second oxidant, stirring and mixing uniformly, and then introducing the mixed liquid into an oxidation reaction tank;
(2) the liquid introduced into the oxidation reaction tank is subjected to oxidation reaction under the heating action of steam;
(3) introducing the liquid after the oxidation reaction in the oxidation reaction tank into a preheater at the bottom of the first stirring tank for cooling, introducing the liquid into the second stirring tank after the cooling is finished, and adjusting the pH value to 6-8;
(4) introducing the liquid with the pH adjusted in the second stirring tank into a first sedimentation tank in the treatment module, adding a first coagulant and a first flocculating agent into the first sedimentation tank, stirring, coagulating and settling, and then discharging the supernatant reaching the standard;
and/or introducing the supernatant into a second sedimentation tank in the circulation module, adding an adsorbent into the second sedimentation tank for stirring, adding a second coagulant and a second flocculant for stirring, performing coagulation sedimentation, and then discharging the supernatant reaching the standard for recycling.
According to the method provided by the invention, the washing waste liquid is introduced into the first stirring tank and the pH value is adjusted to 2-4, then the first oxidant and the second oxidant are continuously introduced into the first stirring tank, under the environment condition of the provided pH value, the washing waste liquid added with the oxidant can be subjected to oxidation reaction on the basis of heat provided by the steam heating layer when being introduced into the oxidation reaction tank, the COD (chemical oxygen demand) value in the washing waste liquid is reduced, then the liquid after oxidation is cooled by the preheater and is discharged into the second stirring tank for further pH value adjustment so as to be subjected to coagulation sedimentation or coagulation adsorption sedimentation subsequently, and the discharge standard or the recycling standard is achieved; the device provided by the invention can be used for reasonably treating or recycling the washing waste liquid, can effectively utilize steam discharged by a power plant to heat, has excellent heat reutilization rate in the device, and is simple and convenient to operate integrally and environment-friendly.
As a preferred embodiment of the treatment and recycling method of the present invention, the first acid-base modifier and the second acid-base modifier include at least one of sodium hydroxide, potassium hydroxide, calcium oxide, sulfuric acid, nitric acid, hydrochloric acid, and oxalic acid.
As a preferred embodiment of the treatment and recycling method of the present invention, the first oxidizing agent includes at least one of ferrous sulfide and its hydrate, ferrous sulfate and its hydrate, ferrous chloride and its hydrate, and ferrous oxide and its hydrate.
As a preferable embodiment of the treatment and reuse method of the present invention, the mass volume ratio of the added amount of the first oxidant to the liquid in the first agitation tank is (1-10) g/L.
As a preferred embodiment of the treatment and recycling method of the present invention, the second oxidant includes at least one of hydrogen peroxide and sodium hypochlorite.
As a preferred embodiment of the treatment and reuse method of the present invention, the second oxidizing agent is hydrogen peroxide.
As a preferred embodiment of the treatment and reuse method of the present invention, the ratio of the addition amount of the second oxidant to the volume of the liquid in the first stirring tank is (8-20) mL/L.
After the pH is adjusted in the first stirring tank, adding a first oxidant, uniformly stirring, adding a second oxidant, uniformly mixing, and then entering an oxidation reaction tank for heating oxidation reaction, wherein the added first oxidant can provide ferrous ions, and under the catalytic action of the ferrous ions, the second oxidant added in the washing waste liquid can release hydroxyl radicals which have strong oxidizing property, so that organic matters and the like in the waste water are completely oxidized, and the specific reaction formula is as follows;
Fe 2+ + agent → Fe 3+ +·OH (1)
RH+·OH→·R+H 2 O (2)
·R+Fe 3+ →Fe 2+ + product (3)
As a preferred embodiment of the treatment and recycling method of the present invention, the first coagulant and the second coagulant include at least one of polyaluminium chloride, polyferric sulfate, ferric trichloride, polyacrylamide and polyaluminium ferric chloride.
As a preferable embodiment of the treatment and recycling method, the mass-to-volume ratio of the adding amount of the first coagulant and the second coagulant to the liquid in the coagulation tank is (5-30) mg/L.
As a preferred embodiment of the treatment and recycling method, the first flocculating agent and the second flocculating agent comprise at least one of polyacrylamide, polyaluminium chloride, polyferric sulfate, ferric trichloride and polyaluminium ferric chloride.
As a preferred embodiment of the treatment and recycling method, the ratio of the adding amount of the first flocculating agent and the second flocculating agent to the mass volume of the liquid in the coagulation basin is (0.5-2) mg/L.
As a preferred embodiment of the treatment and recycling method of the present invention, the adsorbent is activated carbon; the active carbon comprises active carbon particles or active carbon powder with the particle size of 80-200 meshes.
As a preferred embodiment of the treatment and reuse method, the mass-to-volume ratio of the added amount of the adsorbent to the liquid in the second sedimentation tank is (2-20) g/L.
By adding the adsorbent with proper quality, under the adsorption action of the adsorbent, the COD value in the washing waste liquid is reduced again, the possibility of corrosion of the washing waste liquid to equipment is eliminated, and the influence on the quality of the reuse water is reduced; meanwhile, by matching with a coagulant and a flocculating agent added into the coagulation tank, particulate matters in the washing waste liquid are gradually gathered and settled, and the chroma turbidity of the washing waste liquid is also reduced.
As a preferred embodiment of the treatment and recycling method of the present invention, in the step (1), the stirring speed is 50-300rpm, and the preheating time of the stirring is 15-50 minutes.
As a preferred embodiment of the treatment and recycling method of the present invention, in the step (2), the temperature of the oxidation reaction is 60-100 ℃, the time of the oxidation reaction is 40-200 minutes, the flow rate of the steam is 50-200kg/h, and the stirring speed during the oxidation reaction is 100-500 rpm.
As a preferred embodiment of the treatment and recycling method of the present invention, in the step (3), the temperature is reduced in a preheater, wherein the temperature reduction time is 15 to 50 minutes, and the temperature after temperature reduction is 15 to 25 ℃.
As a preferable embodiment of the treatment and recycling method of the present invention, in the step (3), stirring is performed in the second stirring tank while adjusting the pH by the second acid-base adjusting agent, and the stirring speed is 5 to 300 rpm.
As a preferred embodiment of the treatment and recycling method of the present invention, in the step (4), the time for adding the adsorbent is 30-300 minutes, and the stirring speed is 100-500 rpm.
As a preferred embodiment of the treatment and recycling method of the present invention, in the step (4), the adding of the first coagulant and the first flocculant and the adding of the second coagulant and the second flocculant comprise stirring at a high speed and then stirring at a low speed; the stirring speed of the rapid stirring is 100-500rpm, and the time of the rapid stirring is 1-10 minutes; the stirring speed of the slow stirring is 20-80rpm, and the time of the slow stirring is 10-50 minutes.
Compared with the prior art, the invention has the beneficial effects that:
firstly, the method comprises the following steps: the invention provides a treatment and circulation coupling device for washing waste liquid of a gas turbine of a power plant, which comprises a washing waste liquid treatment module and a circulation module, and can be conveniently selected by the power plant according to actual requirements, so that on one hand, the washing waste liquid can be discharged after reaching the standard, and on the other hand, the washing waste liquid can be used as circulating cooling water, so that the water requirement of the power plant under the condition that the total water consumption is controlled is reduced;
secondly, the method comprises the following steps: the steam heating heat exchanger and the preheater are introduced into the device for treating and recycling the water washing waste liquid of the gas turbine of the power plant, so that the heat source of the power plant and the normal-temperature liquid can be fully utilized to heat and cool the water washing waste liquid of the gas turbine, the high-efficiency utilization of resources is realized, and the energy can be effectively saved;
thirdly, the method comprises the following steps: the method provided by the invention has good process effect and high removal rate of COD in the washing waste liquid of the gas turbine of the power plant, the COD concentration in the effluent discharged by the treatment module after reaching the standard is lower than 500mg/L, and the COD concentration in the effluent circulated by the circulation module after reaching the standard is lower than 60 mg/L;
fourthly: the method provided by the invention is simple to operate and simple and convenient in process, and can realize the recycling of cooling water through the parallel circulating modules while solving the problem of treatment of the washing waste liquid, so that more than 150 tons of water can be saved every year, and the in-plant recycling of water resources is realized.
Drawings
FIG. 1 is a schematic structural view of a device for treating and recycling waste water from washing of a power plant gas turbine, according to an embodiment of the present invention;
1-a first stirring tank, 2-a preheater, 3-an oxidation reaction tank, 4-a second stirring tank, 5-a first sedimentation tank, 6-a second sedimentation tank, 7-a first acid-base regulator doser, 8-a first oxidant doser, 9-a second oxidant doser, 10-a second acid-base regulator doser, 11-a first coagulant doser, 12-a first flocculant doser, 13-a second coagulant doser, 14-a second flocculant doser, 15-an adsorbent doser and 16-a stirrer;
101-a first pipe, 102-a second pipe, 103-a third pipe, 104-a fourth pipe, 105-a fifth pipe, 106-a sixth pipe, 107-a seventh pipe, 108-an eighth pipe;
201-steam inlet, 202-steam outlet;
301-water inlet pump, 302-first water pump, 303-second water pump, 304-third water pump, 305-fourth water pump, 306-fifth water pump, 307-first water outlet pump, 308-second water outlet pump, 309-first sewage pump and 310-second sewage pump;
FIG. 2 is a graph showing the relationship between temperature and time and COD value in effluent in example 2 of the present invention;
FIG. 3 is a comparison graph of the content of the relevant substances in the effluent reaching the standard in example 2 of the present invention with the standard;
FIG. 4 is a comparison graph of the content of the relevant substances in the quality of the recycled effluent water in example 2 of the present invention with the standard.
Detailed Description
To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to specific examples.
Example 1
The structure schematic diagram of the device for treating and recycling the washing waste liquid of the power plant combustion engine in the embodiment is shown in fig. 1;
the device comprises a first stirring tank 1, a preheater 2, an oxidation reaction tank 3, a second stirring tank 4, a first sedimentation tank 5 and a second sedimentation tank 6; the first stirring tank 1, the oxidation reaction tank 3, the second stirring tank 4, the first sedimentation tank 5 and the second sedimentation tank 6 are all provided with a stirrer 16; the preheater 2 is arranged at the bottom of the first stirring tank 1, the first stirring tank 1 is connected with a water inlet of the oxidation reaction tank 3 through a second pipeline 102, a first water pump 302 is arranged on the second pipeline 102, a water outlet of the oxidation reaction tank 3 is connected with a water inlet of the preheater 2 through a third pipeline 103, a second water pump 303 is arranged on the third pipeline 103, a water outlet of the preheater 2 is connected with the second stirring tank 4 through a fourth pipeline 104, a third water pump 304 is arranged on the fourth pipeline 104, the second stirring tank 4 is connected with the first sedimentation tank 5 and the second sedimentation tank 6 in parallel, wherein a connecting pipeline between the second stirring tank 4 and the first sedimentation tank 5 is a fifth pipeline 105, a fourth water pump 305 is arranged on the fifth pipeline 105, a connecting pipeline between the second stirring tank 4 and the second sedimentation tank 6 is a sixth pipeline 106, and a fifth water pump 306 is arranged on the sixth pipeline;
the outer layer of the oxidation reaction tank 3 is provided with a steam heating layer, and the left side and the right side of the steam heating layer are respectively provided with a steam inlet 201 and a steam outlet 202;
the first stirring tank 1 is also connected with a first acid-base modifier doser 7, a first oxidant doser 8 and a second oxidant doser 9, the second stirring tank 4 is also connected with a second acid-base modifier doser 10, the first sedimentation tank 5 is also connected with a first coagulant doser 11 and a first flocculant doser 12, and the second sedimentation tank 6 is also connected with a second coagulant doser 13, a second flocculant doser 14 and an adsorbent doser 15;
a water inlet of the first stirring tank 1 is connected with a washing waste liquid outlet (not shown) of the power plant combustion engine through a first pipeline 101, and a water inlet pump 301 is arranged on the first pipeline 101; the water outlet of the first sedimentation tank 5 is connected with a water outlet tank (not shown in the figure) through a seventh pipeline 107, the seventh pipeline 107 is provided with a first water outlet pump 307, the sewage outlet of the first sedimentation tank 5 is connected with a sewage disposal tank (not shown in the figure), and the connecting pipeline of the first sedimentation tank and the sewage disposal tank is provided with a first sewage disposal pump 309; the water outlet of the second sedimentation tank 6 is connected with a cooling reuse water system (not shown in the figure) of the power plant through an eighth pipeline 108, a second water outlet pump 308 is arranged on the eighth pipeline 108, the sewage outlet of the second sedimentation tank 6 is connected with a sewage disposal tank (not shown in the figure), and a second sewage disposal pump 310 is arranged on the connecting pipeline of the first sedimentation tank and the sewage disposal tank.
The method for treating and recycling the washing waste liquid of the gas turbine of the power plant by adopting the treatment and recycling device of the embodiment comprises the following steps:
(1) introducing the water washing waste liquid of the gas turbine of a certain power plant in Guangdong into a first stirring tank 1 through a water inlet pump 301, adding 2mol/L of sodium hydroxide aqueous solution and 2mol/L of sulfuric acid through a first acid-base regulator doser 8 to adjust the pH value to 3, adding ferrous sulfate heptahydrate through a first oxidant doser 9, wherein the mass-volume ratio of the added amount of the ferrous sulfate heptahydrate to the waste liquid is 1.25g/L, stirring for 15 minutes, adding 27.5 mass percent of hydrogen peroxide solution through a second oxidant doser 10, wherein the volume ratio of the added amount of the hydrogen peroxide to the waste liquid is 10mL/L, stirring and mixing uniformly at the stirring speed of 150rpm, and then introducing the mixed liquid into an oxidation reaction tank 3 through a first water pump 302;
(2) the liquid introduced into the oxidation reaction tank 3 is heated by an outer steam heating layer to generate oxidation reaction, wherein the temperature of the oxidation reaction is 100 ℃, the reaction time is 20 minutes, and the steam flow is 150 Kg/h;
(3) introducing the liquid after the oxidation reaction in the oxidation reaction tank 3 into a bottom preheater 2 of the first stirring tank 1 through a second water pump 303 on a third pipeline 103 for cooling, wherein the cooling time is 40 minutes, introducing the liquid into a second stirring tank 4 through a third water pump 304 on a fourth pipeline 104 after cooling to 20 ℃, and adding sodium hydroxide through a second acid-base regulator doser 10 to adjust the pH value to 7;
(4) introducing the liquid part of which the pH is adjusted in the second stirring tank 4 into a first sedimentation tank 5 in the treatment module, adding a first coagulant of polyaluminum ferric chloride and a first flocculant of polyacrylamide into the first sedimentation tank 5, wherein the mass-to-volume ratio of the addition amount of the polyaluminum ferric chloride to the waste liquid is 5mg/L, the mass-to-volume ratio of the addition amount of the polyacrylamide to the waste liquid is 1mg/L, quickly stirring at the speed of 200rpm, slowly stirring at the speed of 50rpm, keeping the total stirring time for 20 minutes, coagulating and settling for 20 minutes after the stirring is finished, and then discharging the supernatant reaching the standard through a first water outlet pump 307;
the remaining part of the liquid whose pH has been adjusted in the second stirring tank 4 is introduced into the second sedimentation tank 6 in the circulation module, adding 200-mesh active carbon into the second sedimentation tank 6 through an adsorbent doser 15, wherein the mass-volume ratio of the added amount of the active carbon to the waste liquid is 3g/L, the adsorption time is 60 minutes, the stirring speed during adsorption is 250rpm, then adding polyaluminium ferric chloride and polyacrylamide through a second coagulant 13 doser and a second flocculant doser 14, wherein the mass volume ratio of the adding amount of the polyaluminum ferric chloride to the waste liquid is 5mg/L, the mass volume ratio of the adding amount of the polyacrylamide to the waste liquid is 1mg/L, the mixture is quickly stirred at the speed of 200rpm, then stirring slowly at the speed of 50rpm for 20 minutes, coagulating and settling for 20 minutes after stirring is finished, and then recycling the supernatant reaching the standard through a second water outlet pump 309;
wherein, the parameters of the water washing waste liquid of the gas turbine of a certain power plant in Guangdong are shown in the table 1;
table 1: parameter table of gas turbine washing waste liquid of Guangdong power plant
| Categories | COD | Ammonia nitrogen | Total phosphorus | Volatile phenols | Animal and vegetable oil | Petroleum products | Arsenic (As) | BOD 5 |
| mg·L -1 | 2132 | 14.94 | 0.0754 | <0.01 | 13.5 | 0.63 | 0.0004 | 6.6 |
Example 2
This example is consistent with the apparatus of example 1, wherein the preparation method comprises the steps of:
(1) introducing the water washing waste liquid of the gas turbine of a certain power plant in Guangdong into a first stirring tank 1 through a water inlet pump 301, adding 2mol/L of sodium hydroxide aqueous solution and 2mol/L of sulfuric acid through a first acid-base regulator doser 8 to regulate the pH value to 3.5, adding ferrous sulfate heptahydrate through a first oxidant doser 9, wherein the mass-volume ratio of the added amount of the ferrous sulfate heptahydrate to the waste liquid is 2.5g/L, stirring for 15 minutes, adding 27.5 mass percent of hydrogen peroxide solution through a second oxidant doser 10, wherein the volume ratio of the added amount of the hydrogen peroxide to the waste liquid is 15mL/L, stirring and mixing uniformly at the stirring speed of 150rpm, and then introducing the mixed liquid into an oxidation reaction tank 3 through a first water pump 302;
(2) the liquid introduced into the oxidation reaction tank 3 is heated by an outer steam heating layer to generate oxidation reaction, wherein the temperature of the oxidation reaction is 80 ℃, and the reaction time is 30 minutes; the steam flow is 100 Kg/h;
(3) introducing the liquid after the oxidation reaction in the oxidation reaction tank 3 into a bottom preheater 2 of the first stirring tank 1 through a second water pump 303 on a third pipeline 103 for cooling for 30 minutes, introducing the liquid into a second stirring tank 4 through a third water pump 304 on a fourth pipeline 104 after cooling to 20 ℃, and adding sodium hydroxide through a second acid-base regulator doser 10 to regulate the pH value to 7;
(4) introducing the liquid part of which the pH is adjusted in the second stirring tank 4 into a first sedimentation tank 5 in the treatment module, adding a first coagulant, namely polyaluminium chloride and polyacrylamide serving as a first flocculating agent into the first sedimentation tank 5, wherein the mass-to-volume ratio of the added amount of the polyaluminium chloride to the waste liquid is 10mg/L, the mass-to-volume ratio of the added amount of the polyacrylamide to the waste liquid is 2mg/L, quickly stirring at the speed of 300rpm, slowly stirring at the speed of 30rpm, keeping the total stirring time for 30 minutes, carrying out coagulation and sedimentation for 30 minutes after the stirring is finished, and then discharging the supernatant reaching the standard through a first water outlet pump 307;
the remaining part of the liquid whose pH has been adjusted in the second stirring tank 4 is introduced into the second sedimentation tank 6 in the circulation module, adding 400-mesh active carbon into the second sedimentation tank 6 through an adsorbent doser 15, wherein the mass-volume ratio of the added amount of the active carbon to the waste liquid is 3g/L, the adsorption time is 90 minutes, the stirring speed during adsorption is 250rpm, then adding polyaluminium chloride and polyacrylamide through a second coagulant 13 doser and a second flocculant doser 14, wherein the mass volume ratio of the adding amount of the polyaluminium chloride to the waste liquid is 10mg/L, the mass volume ratio of the adding amount of the polyacrylamide to the waste liquid is 2mg/L, the mixture is quickly stirred at the speed of 200rpm, then slowly stirring at the speed of 50rpm for 30 minutes, coagulating and settling for 25 minutes after stirring is finished, and then recycling the supernatant reaching the standard through a second water outlet pump 309;
wherein, the parameters of the water washing waste liquid of the combustion engine of a certain power plant in Shanghai are shown in the table 2;
table 2: parameter table of washing waste liquid of gas turbine of Shanghai power plant
| Categories | COD | Ammonia nitrogen | Total phosphorus | Volatile phenols | Animal and vegetable oil | Petroleum products | Arsenic (As) | BOD 5 |
| mg·L -1 | 1679 | 5.7 | 0.006 | <0.01 | 3.4 | 1.2 | 0.0011 | 3.2 |
Example 3
In this example, the effect of the reaction temperature and the reaction time in the oxidation reaction tank 3 on the COD value of the effluent from the treatment module was investigated, and the operation of the other parameters was the same except that the oxidation reaction temperature and the reaction time in the oxidation reaction tank 3 were not the same, wherein 5 temperature gradients of 24 ℃, 40 ℃, 60 ℃, 80 ℃, 100 ℃ and 8 time gradients of 10 minutes, 20 minutes, 30 minutes, 40 minutes, 50 minutes, 60 minutes, 90 minutes and 120 minutes were set.
Effect example 1
The present effect example verifies the water quality of the treated water and the recycled water obtained in example 1-2, wherein the results of the treated effluent water quality reaching the standard are shown in Table 3, the results of the treated cooling water effluent water quality recycled are shown in Table 4,
table 3: EXAMPLE 1-2 quality of treated effluent
Table 4: EXAMPLE 1-2 effluent quality of Cooling Water recycled after treatment
| Categories | Example 1 | Example 2 | GB/T 19923-2005 |
| COD(mg·L -1 ) | 34 | 20 | 60 |
| pH | 7 | 7 | 6.5-8.5 |
| Suspended substance (ss) (mg. L) -1 ) | 1.30 | 2.67 | - |
| Turbidity (NTU) | 3.40 | 3.01 | 5 |
| Chroma (degree) | 11 | 15 | 30 |
| BOD 5 (mg·L -1 ) | 2.10 | 1.10 | 10 |
| Sulfate (mg. L) -1 ) | 80 | 120 | 600 |
| Anionic surface ActivityAgent (LAS) (mg. L) -1 ) | 0.04 | 0.13 | 0.50 |
| Petroleum products (mg. L) -1 ) | 0.61 | 0.33 | 1 |
| Total phosphorus (mg. L) -1 ) | 0.07 | 0.002 | 1 |
| Ammonia nitrogen (mg. L) -1 ) | 4.72 | 3.65 | 10 |
As can be seen from tables 1-4, the technical scheme provided by the invention can meet the requirements of relevant standards whether the quality of the treated effluent discharged after reaching the standard or the quality of the recycled effluent meets the requirements of the relevant standards, and the technical scheme provided by the invention can achieve remarkable effects;
meanwhile, parameters of the discharged water and the recycled water which reach the standard and are obtained in the embodiment 2 are made into bar charts, and as can be seen from fig. 3 and 4, the treated water and the recycled water which are obtained by adopting the technical scheme of the invention can meet the requirements of the national relevant standards, even are far lower than the minimum value required in the national standards.
Effect example 2
This effect example verifies the influence of different temperature gradients and time gradients in the oxidation reaction tank 3 on the COD in the effluent treated by the treatment module, and the specific test result is shown in fig. 2, where the black line in fig. 2 represents the COD concentration in the original water-washing waste liquid of the gas turbine, and as can be seen from fig. 2, as the oxidation reaction time is prolonged, the COD value of the effluent will decrease, but the decrease is far less than the decrease of the COD value due to the increase of the temperature, which means that the oxidation reaction tank 3 is provided with a steam heating layer on the outer surface of the oxidation reaction tank 3, and the liquid in the oxidation reaction tank 3 is heated by steam, so as to significantly promote the oxidation reaction, reduce the COD value of the system, and at the same time, significantly shorten the time, and improve the treatment efficiency.
Finally, it should be noted that the above embodiments are intended to illustrate the technical solutions of the present invention and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. A treatment and recycling device for washing waste liquid of a power plant gas turbine is characterized by comprising a first stirring tank, an oxidation reaction tank and a second stirring tank which are sequentially connected; the second stirring tank is connected with the treatment module and the recycling module in parallel; the oxidation reaction tank is provided with a steam heating layer.
2. The treatment and reuse apparatus according to claim 1, wherein said treatment module comprises a first sedimentation tank; the recycling module comprises a second sedimentation tank.
3. The treatment and reuse apparatus according to claim 1, wherein said apparatus further comprises a preheater; the preheater is arranged at the bottom of the first stirring tank, a water inlet of the preheater is connected with a water outlet of the oxidation reaction tank, and a water outlet of the preheater is connected with the second stirring tank.
4. The treatment and reuse apparatus according to claim 1, further comprising a first acidifying agent doser, a first oxidizing agent doser, and a second oxidizing agent doser connected to the first agitation tank; a second acid-base regulator doser connected with the second stirring tank; a first coagulant doser and a first flocculant doser which are connected with the first sedimentation tank; and the second coagulant doser, the second flocculant doser and the adsorbent doser are connected with the second sedimentation tank.
5. The treatment and reuse apparatus according to claim 1, wherein stirring means are provided in said first stirring tank, said oxidation reaction tank, said second stirring tank, said first sedimentation tank, and said second sedimentation tank.
6. A method for treating and recycling water washing waste liquid of a power plant combustion engine is characterized by comprising the following steps:
(1) introducing the power plant gas turbine washing waste liquid into a first sedimentation tank to adjust the pH value to 2-4, then sequentially adding a first oxidant and a second oxidant, stirring and mixing uniformly, and then introducing the mixed liquid into an oxidation reaction tank;
(2) the liquid introduced into the oxidation reaction tank is subjected to oxidation reaction under the heating action of steam;
(3) introducing the liquid after the oxidation reaction in the oxidation reaction tank into a preheater at the bottom of the first stirring tank for cooling, introducing the liquid into the second stirring tank after the cooling is finished, and adjusting the pH value to 6-8;
(4) introducing the liquid with the pH adjusted in the second stirring tank into a first sedimentation tank in the treatment module, adding a first coagulant and a first flocculating agent into the first sedimentation tank, stirring, coagulating and settling, and then discharging the supernatant reaching the standard;
and/or introducing the supernatant into a second sedimentation tank in the circulation module, adding an adsorbent into the second sedimentation tank for stirring, adding a second coagulant and a second flocculant for stirring, performing coagulation sedimentation, and discharging the qualified supernatant for recycling.
7. The treatment and reuse method according to claim 6, wherein said first acid-base modifier and said second acid-base modifier comprise at least one of sodium hydroxide, potassium hydroxide, calcium oxide, sulfuric acid, nitric acid, hydrochloric acid, oxalic acid; the first oxidant comprises at least one of ferrous sulfide and hydrate thereof, ferrous sulfate and hydrate thereof, ferrous chloride and hydrate thereof, and ferrous oxide and hydrate thereof; the second oxidant comprises at least one of hydrogen peroxide and sodium hypochlorite; the first coagulant and the second coagulant comprise at least one of polyaluminium chloride, polyferric sulfate, ferric trichloride and polyaluminium ferric chloride; the first flocculating agent and the second flocculating agent comprise at least one of polyacrylamide, polyaluminium chloride, polyferric sulfate, ferric trichloride and polyaluminium ferric chloride; the adsorbent is activated carbon.
8. The treatment and reuse method according to claim 6, wherein in the step (2), the temperature of the oxidation reaction is 60-100 ℃, the time of the oxidation reaction is 40-200 minutes, and the flow rate of the steam is 50-200 kg/h.
9. The treatment and recycling method as claimed in claim 6, wherein in the step (4), the time for adding the adsorbent is 30-300 minutes, and the stirring speed is 100-500 rpm.
10. The treatment and reuse method according to claim 6, wherein in the step (4), the adding of the first coagulant and the first flocculant and the adding of the second coagulant and the second flocculant are stirred by rapid stirring and then slow stirring; the stirring speed of the rapid stirring is 100-500rpm, and the time of the rapid stirring is 1-10 minutes; the stirring speed of the slow stirring is 20-80rpm, and the time of the slow stirring is 10-50 minutes.
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| WO2013132294A1 (en) * | 2012-03-09 | 2013-09-12 | Biazzi S.A. | Process for treatment of waste water from nitro-aromatic production |
| WO2018095124A1 (en) * | 2016-11-25 | 2018-05-31 | 中冶赛迪工程技术股份有限公司 | Method and system for decarbonization, decolorization, and decyanation in deep treatment of coking wastewater |
| WO2019029033A1 (en) * | 2017-08-07 | 2019-02-14 | 苏州久沛环保科技有限公司 | Wastewater treatment process combining ultrasonic wave and fenton method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2013132294A1 (en) * | 2012-03-09 | 2013-09-12 | Biazzi S.A. | Process for treatment of waste water from nitro-aromatic production |
| WO2018095124A1 (en) * | 2016-11-25 | 2018-05-31 | 中冶赛迪工程技术股份有限公司 | Method and system for decarbonization, decolorization, and decyanation in deep treatment of coking wastewater |
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