CN105712539A - Deep treatment system and process for coked phenol and cyanide wastewater - Google Patents
Deep treatment system and process for coked phenol and cyanide wastewater Download PDFInfo
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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
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- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- 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
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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- 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
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- 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
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—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
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- 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
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- 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
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/005—Processes using a programmable logic controller [PLC]
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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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
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/026—Fenton's reagent
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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
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/02—Softening water by precipitation of the hardness
Abstract
The invention relates to a deep treatment system for coked phenol and cyanide wastewater. The system comprises a chemical adding tank, a rapid stirring reaction tank, a low-speed stirring reaction tank, a sedimentation tank, a primary reaction tank, an aeration reaction tank, a secondary reaction tank, an inclined tube sedimentation tank, a sand filter tank, a roots blower, a sludge tank, a plate-and-frame filter press and a chemical adding system, wherein the chemical adding tank, the rapid stirring reaction tank, the low-speed stirring reaction tank, the sedimentation tank, the primary reaction tank, the aeration reaction tank, the secondary reaction tank, the inclined tube sedimentation tank and the sand filter tank are sequentially communicated in series; sludge discharge ports are formed in the sedimentation tank and the inclined tube sedimentation tank and communicated and connected with the sludge tank respectively.
Description
Technical field
The present invention relates to a kind of coking Phenol cyanide wastewater treatment system, particularly a kind of coking wastewater containing phenol and cyanide advanced treatment system and process technique.
Background technology
Along with environmental requirement is more and more stricter, come into effect up-to-date " coking chemistry emission of industrial pollutants standard " (GB16171-2012) standard on January 1st, 2015, directly the CODcr of discharge requires that the CODcr of discharge requires less than 150mg/L indirectly less than 80mg/L.Current independent coke-oven plant substantially can be up to standard by the ammonia nitrogen that early stage is biochemical, but owing to biochemical pollutant levels difficult in sewage are higher, the CODcr of bio-chemical effluent is substantially at about 200-350mg/L, 100-200mg/L is being substantially achieved by conventional materializing strategy CODcr, reaching 150mg/L even 80mg/L extremely difficult, our company develops this process for this present situation and the waste water after biochemistry is processed qualified discharge further.
Summary of the invention
The purpose of the present invention is contemplated to the weak point avoided in background technology, it is provided that a kind of coking wastewater containing phenol and cyanide advanced treatment system and process technique.
For reaching above-mentioned purpose, the present invention adopts the following technical scheme that a kind of coking wastewater containing phenol and cyanide advanced treatment system, including dosing pond, quick agitating reaction pond, stirring at low speed reaction tank, sedimentation tank, first order reaction pond, aerated reaction pond, secondary response pond, tube settler, sand filter, Roots blower, sludge-tank, filter press, medicine system forms, dosing pond, quick agitating reaction pond, stirring at low speed reaction tank, sedimentation tank, first order reaction pond, aerated reaction pond, secondary response pond, tube settler, sand filter is sequentially connected in series connection, sedimentation tank, tube settler is respectively equipped with mud discharging mouth, and mud discharging mouth is connected with sludge-tank respectively.
For a kind of optimization of the present invention, dosing pond is respectively arranged with acid dosing system, iron salt dosing system, hydrogen peroxide dosing system.
For a kind of optimization of the present invention, first order reaction pond is provided with alkali dosing system.
For a kind of optimization of the present invention, secondary response pond is respectively arranged with PAC dosing system, PAM dosing system, Powdered Activated Carbon dosing system.
A kind of optimization for the present invention, described coking wastewater containing phenol and cyanide advanced treatment system also includes aerator, and aerator supplies respectively in the aeration agitation system being separately positioned in dosing pond, quick agitating reaction pond, first order reaction pond, aerated reaction pond, secondary response pond and sand filter and or aerating system.
For a kind of optimization of the present invention, in stirring at low speed reaction tank, secondary response pond, it is equipped with stirring system respectively.
A kind of optimization for the present invention, dosing pond is made up of four lattice ponds, and respectively the first lattice pond, the second lattice pond, the 3rd lattice pond and the 4th lattice pond, acid dosing system and the connection of the first lattice pond connect, iron salt dosing system and the connection of the 3rd lattice pond connect, and hydrogen peroxide dosing system is connected with acid dosing system and the 4th lattice pond.
A kind of optimization for the present invention, secondary response pond is arranged in order by four reaction grid ponds and constitutes, respectively the first reaction grid pond, four reaction grid ponds, the second reaction grid pond, the 3rd reaction grid pond and the 4th reaction grid pond, it is provided with strong aeration agitation system in first reaction grid pond, the second reaction grid pond, it is provided with slow mechanical stirring system in 3rd reaction grid pond, the 4th reaction grid pond, first reaction grid pond is connected with PAC dosing system, second reaction grid pond is connected with PAM dosing system, and the 4th reaction grid pond is connected with Powdered Activated Carbon dosing system.
Technical scheme 2: a kind of coking wastewater containing phenol and cyanide advanced treatment process, coking wastewater containing phenol and cyanide enters dosing pond after biochemistry precipitates, by adding acid, iron salt, mixed by aeration after hydrogen peroxide, enter back into quick agitating reaction pond and form bigger particle, enter back into the bulky grain float that stirring at low speed reaction tank makes to be previously formed in the process of low rate mixing, be again gathered into the suspended sludge of larger particle, the particles such as suspended sludge are removed by sedimentation tank, mud periodic exhaustion is to sludge concentration tank, sedimentation tank supernatant enters back into subsequent stage reaction tank, add decolouring alkali, polluter is removed in reaction decolouring further, calcium ion reaction Carbon Dioxide in Air blasted again through aerated reaction pond and decolour in alkali forms precipitation of calcium carbonate adsorption fouling material, mixed liquor is in entering secondary response pond, add PAC, the further coagulating of PAM, mud-water separation is carried out again through tube settler, mud periodic exhaustion is to sludge-tank, supernatant discharges after removing float finally by sand filter.
A kind of optimization for the present invention, the first lattice pond in dosing pond adds hydrochloric acid, second lattice pond pH meter automatically controls the chemical feeding quantity of the first lattice, control the pH in the second lattice pond at 2-4,3rd lattice pond adds iron salt, iron salt is chlorate ferrum or ferrous sulfate, the dosage of iron salt is at 200mg/L-400mg/L, hydrogen peroxide is added again in the 4th lattice pond, the dosage of hydrogen peroxide is at 1500mg/L-2500mg/L, the time of staying in each pond is 3-5min, and each pond mixes each through aeration agitation.
For a kind of optimization of the present invention, quick agitating reaction pond adopts aeration agitation mixing, and the water time of staying in pond is 1h-2.5h, sets multiple baffle plate and prevent the short stream of water in pond；Stirring at low speed reaction tank adopts mechanical type reaction tank, is 1h-2.5h during water stop in pond, sets 3 gears-4 and keep off blenders in pond；Sedimentation tank adopts vertical sedimentation basin and width flow settling pond, and the water effective time of staying in pond is 2-3h；Sedimentation tank supernatant enters back into first order reaction pond, adds special decolouring alkali in first order reaction pond, controls the pH in first order reaction pond at 8-11, and the water time of staying in first order reaction pond is 15min-30min；The water outlet of first order reaction pond enters aerated reaction pond, and the pH after aerated reaction is at 8.0-9.0, and the water effective time of staying in aerated reaction pond is 4h-5h；The water outlet of aerated reaction pond enters back into secondary response pond, secondary response pond is made up of 4 lattice, the time of staying in every reaction grid pond is 3-5min, first reaction grid pond, the second reaction grid pond adopt strong aeration agitation, 3rd reaction grid pond, the 4th reaction grid pond adopt slow mechanical stirring, then add PAC and PAM and carry out flocculation reaction, make flco become bigger suspended granular sludge, first reaction grid pond adds the dosage of PAC, PAC at 100mg/L-400mg/L.Second reaction grid pond adds PAM, the dosage of PAM, at 0.5mg/L-5mg/L, is adding Powdered Activated Carbon in the 4th reaction grid pond, and Powdered Activated Carbon and water are uniformly mixed to form suspension, adding further adsorption fouling material by dosing pump, dosage is at 200mg/L-500mg/L；The water outlet of secondary response pond enters tube settler, and the water effective time of staying in pond is 2h-3h；Tube settler water outlet removes float further at entrance sand filter, loads the quartz sand of different-diameter in pond, and the water effective time of staying in pond is 15min-20min, and controlling water flow velocity in pond is 5.5m/h-7.5m/h.
The present invention, compared with background technology, has by removing the CODcr of 50-70% in water after dosing pond, quick agitating reaction pond, stirring at low speed reaction tank, sedimentation tank dosing reaction, and the CODcr of water outlet is substantially at 100-150mg/L；By removing the CODcr of 40-50% in water after first order reaction pond, aerated reaction pond, secondary response pond, tube settler dosing reaction, the CODcr of water outlet can control within 80mg/L；Total system can adopt civil engineering and steel construction pond；All medicine systems adopt and automatically control, and according to the water inlet pollutant levels of system, automatically can be adjusted by PLC, and automaticity is high；Adopt twice precipitation dosing reaction, the removal ability of water pollutant is high, can be adjusted according to the influent quality of system, system mobility strong, operating flexibility is high；System end adds Powdered Activated Carbon and finally adsorbs, and can automatically adjust according to effluent quality situation, and system stability is high；First order reaction pond adds special decolouring alkali, decolouring alkali be mainly composed of Calx, and add multiple additives and auxiliary material is made, and there is dephosphorization, remove SS and some heavy metal, regulate PH, improve the effects such as water quality, the removal effect of polluter is good；Transformation suitable in currently all coking wastewater processing system, it is only necessary to after bio-chemical effluent, increases this technique, the suitability, practical；Adopting the principles such as physics dosing response system, responding time is short, and outlet effect is obvious.
Accompanying drawing explanation
The system that Fig. 1 is coking wastewater containing phenol and cyanide advanced treatment system arranges block diagram.
Detailed description of the invention
Embodiment 1: with reference to Fig. 1.A kind of coking wastewater containing phenol and cyanide advanced treatment system, including dosing pond 1, quick agitating reaction pond 2, stirring at low speed reaction tank 3, sedimentation tank 4, first order reaction pond 5, aerated reaction pond 6, secondary response pond 7, tube settler 8, sand filter 9, aerator 18, sludge-tank 10, filter press, medicine system forms, dosing pond 1, quick agitating reaction pond 2, stirring at low speed reaction tank 3, sedimentation tank 4, first order reaction pond 5, aerated reaction pond 6, secondary response pond 7, tube settler 8, sand filter 9 is sequentially connected in series connection, sedimentation tank 4, tube settler 8 is respectively equipped with mud discharging mouth, and mud discharging mouth is connected with sludge-tank 10 respectively.Stirring system it is equipped with respectively in stirring at low speed reaction tank 1, secondary response pond 7.Dosing pond 1 is respectively arranged with acid dosing system 11, iron salt dosing system 12, hydrogen peroxide dosing system 13.First order reaction pond 5 is provided with alkali dosing system 14.Secondary response pond 7 is respectively arranged with PAC dosing system 15, PAM dosing system 16, Powdered Activated Carbon dosing system 17.Described coking wastewater containing phenol and cyanide advanced treatment system also includes aerator 18, aerator 18 supplies in being separately positioned on dosing pond 1 respectively, quick agitating reaction pond 2, first order reaction pond 5, aerated reaction pond 6, aeration agitation system in secondary response pond 7 and sand filter and or aerating system, dosing pond 1 is made up of four lattice ponds, and respectively the first lattice pond, second lattice pond, 3rd lattice pond and the 4th lattice pond, acid dosing system 11 is connected with the first lattice pond, iron salt dosing system 12 is connected with the 3rd lattice pond, hydrogen peroxide dosing system 13 is connected with the 4th lattice pond with acid dosing system 11.Secondary response pond 7 is arranged in order by four reaction grid ponds and constitutes, respectively the first reaction grid pond, four reaction grid ponds, the second reaction grid pond, the 3rd reaction grid pond and the 4th reaction grid pond, it is provided with strong aeration agitation system in first reaction grid pond, the second reaction grid pond, it is provided with slow mechanical stirring system in 3rd reaction grid pond, the 4th reaction grid pond, first reaction grid pond is connected with PAC dosing system 15, second reaction grid pond is connected with PAM dosing system 16, and the 4th reaction grid pond is connected with Powdered Activated Carbon dosing system 17.Aeration agitation system, aerating system and slow mechanical stirring system, aerator etc. are this area routine techniques, and the present invention is not detailed at this.
Embodiment 2: with reference to Fig. 1.A kind of coking wastewater containing phenol and cyanide advanced treatment process, coking wastewater containing phenol and cyanide enters dosing pond 1 after biochemistry precipitates, by adding acid, iron salt, mixed by aeration after hydrogen peroxide, enter back into quick agitating reaction pond 2 and form bigger particle, enter back into the bulky grain float that stirring at low speed reaction tank 3 makes to be previously formed in the process of low rate mixing, be again gathered into the suspended sludge of larger particle, the particles such as suspended sludge are removed by sedimentation tank 4, mud periodic exhaustion is to sludge concentration tank, sedimentation tank 4 supernatant enters back into subsequent stage reaction tank 5, add decolouring alkali, polluter is removed in reaction decolouring further, calcium ion reaction Carbon Dioxide in Air blasted again through aerated reaction pond 6 and decolour in alkali forms precipitation of calcium carbonate adsorption fouling material, mixed liquor is in entering secondary response pond 7, add PAC by PAC dosing system 15 and add the further coagulating of PAM by PAM dosing system 16, mud-water separation is carried out again through tube settler 8, mud periodic exhaustion is to sludge-tank 10, supernatant discharges after removing float finally by sand filter 9.Materialized mud enters sludge concentration tank, and after concentration, mud is squeezed into pressure filter by sludge pump, mud cake joint disposal after filter pressing.Sludge concentration tank supernatant and filter pressing water return collecting-tank.PAM is domestic conventional non-ionic high polymer coagulant, molecular weight 1,500,000-2,000 ten thousand, commodity concentration is generally 8%, PAC is that aluminium polychlorid is also referred to as aluminium chlorhydroxide, commonly referred to as water purification agent or coagulant, it is a kind of water-soluble inorganic high molecular polymer between AlCl3 and Al (OH) 3.
The first lattice pond in dosing pond 1 adds hydrochloric acid, second lattice pond pH meter automatically controls the chemical feeding quantity of the first lattice, control the pH in the second lattice pond at 2-4, adding iron salt in the 3rd lattice pond, iron salt is chlorate ferrum or ferrous sulfate, and the dosage of iron salt is at 200mg/L-400mg/L, hydrogen peroxide is added again in the 4th lattice pond, the dosage of hydrogen peroxide is at 1500mg/L-2500mg/L, and the time of staying in each pond is 3-5min, and each pond mixes each through aeration agitation.Quick agitating reaction pond 2 adopts aeration agitation to mix, and the water time of staying in pond is 1h-2.5h, sets multiple baffle plate and prevent the short stream of water in pond；Stirring at low speed reaction tank 3 adopts mechanical type reaction tank, it is 1h-2.5h during water stop in pond, setting 3 gears-4 in pond and keep off blender, the rotating speed system of blender calculates according to the linear velocity at pulpboard center of radius place, and linear velocity is generally gradually decrease to 0.2 meter per second of end gear from 0.5 meter per second of first gear.Set multiple baffle plate in pond and prevent the short stream of water.Sedimentation tank 4 adopts vertical sedimentation basin and width flow settling pond, and the water effective time of staying in pond is 2-3h；
Sedimentation tank 4 supernatant enters back into first order reaction pond 5, first order reaction pond 5 adds decolouring alkali, decolouring alkali is the independent intellectual property right product of my company, it is mainly composed of Calx, and add multiple additives and auxiliary material is made, it is that my company researches and develops at the experiential basis of long-term waste water control, there is dephosphorization, remove SS and some heavy metal, regulate PH, improve the effects such as water quality.The dosage of decolouring alkali, depending on water quality situation, controls the pH in first order reaction pond 5 at 8-11, and the water time of staying in first order reaction pond 5 is 15min-30min.
First order reaction pond 5 water outlet enters aerated reaction pond 6, due to decolouring alkali be mainly composed of Calx, calcium ion in water is higher, easy fouling Gu aeration blasts air makes the carbon dioxide in air, remove calcium ion unnecessary in water, form precipitation of calcium carbonate and adsorb the polluter in water further, reduce the pH of water outlet, pH after aerated reaction is at 8.0-9.0, and the water effective time of staying in aerated reaction pond 6 is 4h-5h.
Aerated reaction pond 6 water outlet enters back into secondary response pond 7, secondary response pond 7 is made up of 4 lattice, the time of staying in every reaction grid pond is 3-5min, first reaction grid pond, the second reaction grid pond adopt strong aeration agitation, 3rd reaction grid pond, the 4th reaction grid pond adopt slow mechanical stirring, owing in Aeration tank, suspension floc particle is thinner, add PAC and PAM again and carry out flocculation reaction, flco is made to become bigger suspended granular sludge, first reaction grid pond adds the dosage of PAC, PAC at 100mg/L-400mg/L.Second reaction grid pond adds PAM, the dosage of PAM, at 0.5mg/L-5mg/L, is adding Powdered Activated Carbon in the 4th reaction grid pond, and Powdered Activated Carbon and water are uniformly mixed to form suspension, adding further adsorption fouling material by dosing pump, dosage is at 200mg/L-500mg/L.
Secondary response pond 7 water outlet enters tube settler 8, and the water effective time of staying in pond is 2h-3h, and inclined tube adopts the materials such as PP, FRP；Tube settler 8 water outlet removes float further at entrance sand filter 9, loads the quartz sand of different-diameter in pond, and the water effective time of staying in pond is 15min-20min, and controlling water flow velocity in pond is 5.5m/h-7.5m/h.Materialized mud enters sludge concentration tank, and after concentration, mud is squeezed into pressure filter by sludge pump, mud cake joint disposal after filter pressing.Sludge concentration tank supernatant and filter pressing water return collecting-tank.By removing the CODcr of 50-70% in water after dosing pond, quick agitating reaction pond, stirring at low speed reaction tank, sedimentation tank dosing reaction, the CODcr of water outlet is substantially at 100-150mg/L；By removing the CODcr of 40-50% in water after first order reaction pond, aerated reaction pond, secondary response pond, tube settler dosing reaction, the CODcr of water outlet can control within 80mg/L；Dosing and control system adopt PLC centralized Control；Total system can adopt civil engineering and steel construction pond.
It is to be understood that: the detailed description although the present invention is contrasted by the present embodiment; but these illustrate, the simply simple declaration to the present invention, rather than limitation of the present invention; any without departing from the innovation and creation in true spirit, each fall within protection scope of the present invention.
Claims (9)
1. a coking wastewater containing phenol and cyanide advanced treatment system, it is characterized in that including dosing pond (1), quick agitating reaction pond (2), stirring at low speed reaction tank (3), sedimentation tank (4), first order reaction pond (5), aerated reaction pond (6), secondary response pond (7), tube settler (8), sand filter (9), aerator (18), sludge-tank (10), filter press, medicine system forms, dosing pond (1), quick agitating reaction pond (2), stirring at low speed reaction tank (3), sedimentation tank (4), first order reaction pond (5), aerated reaction pond (6), secondary response pond (7), tube settler (8), sand filter (9) is sequentially connected in series connection, sedimentation tank (4), tube settler is respectively equipped with mud discharging mouth on (8), and mud discharging mouth is connected with sludge-tank (10) respectively.
2. coking wastewater containing phenol and cyanide advanced treatment system according to claim 1, it is characterized in that: dosing pond (1) is respectively arranged with acid dosing system (11), iron salt dosing system (12), hydrogen peroxide dosing system (13), first order reaction pond (5) is provided with alkali dosing system (14), secondary response pond (7) are respectively arranged with PAC dosing system (15), PAM dosing system (16), Powdered Activated Carbon dosing system (17).
3. coking wastewater containing phenol and cyanide advanced treatment system according to claim 1, characterized by further comprising aerator (18), aerator (18) supplies respectively in the aeration agitation system being separately positioned in dosing pond (1), quick agitating reaction pond (2), first order reaction pond (5), aerated reaction pond (6), secondary response pond (7) and sand filter and or aerating system.
4. coking wastewater containing phenol and cyanide advanced treatment system according to claim 1, it is characterised in that stirring at low speed reaction tank (1), secondary response pond are equipped with stirring system in (7) respectively.
5. coking wastewater containing phenol and cyanide advanced treatment system according to claim 2, it is characterized in that dosing pond (1) is made up of four lattice ponds, and respectively the first lattice pond, the second lattice pond, the 3rd lattice pond and the 4th lattice pond, acid dosing system (11) is connected with the first lattice pond, iron salt dosing system (12) is connected with the 3rd lattice pond, and hydrogen peroxide dosing system (13) is connected with the 4th lattice pond with acid dosing system (11).
6. coking wastewater containing phenol and cyanide advanced treatment system according to claim 2, it is characterized in that secondary response pond (7) is arranged in order by four reaction grid ponds to constitute, respectively the first reaction grid pond, four reaction grid ponds, second reaction grid pond, 3rd reaction grid pond and the 4th reaction grid pond, first reaction grid pond, strong aeration agitation system it is provided with in second reaction grid pond, 3rd reaction grid pond, it is provided with slow mechanical stirring system in 4th reaction grid pond, first reaction grid pond is connected with PAC dosing system (15), second reaction grid pond is connected with PAM dosing system (16), 4th reaction grid pond is connected with Powdered Activated Carbon dosing system (17).
7. the coking wastewater containing phenol and cyanide advanced treatment process implementing claim 1, it is characterized in that: coking wastewater containing phenol and cyanide enters dosing pond (1) after biochemistry precipitates, by adding acid, iron salt, mixed by aeration after hydrogen peroxide, enter back into quick agitating reaction pond (2) and form bigger particle, enter back into the bulky grain float that stirring at low speed reaction tank (3) makes to be previously formed in the process of low rate mixing, be again gathered into the suspended sludge of larger particle, the particles such as suspended sludge are removed by sedimentation tank (4), mud periodic exhaustion is to sludge concentration tank, sedimentation tank (4) supernatant enters back into subsequent stage reaction tank (5), add decolouring alkali, polluter is removed in reaction decolouring further, calcium ion reaction Carbon Dioxide in Air blasted again through aerated reaction pond (6) and decolour in alkali forms precipitation of calcium carbonate adsorption fouling material, mixed liquor is in entering secondary response pond (7), add PAC, the further coagulating of PAM, finally add after Powdered Activated Carbon removes major part Organic substance and carry out mud-water separation again through tube settler (8), mud periodic exhaustion is to sludge-tank (10), supernatant discharges after removing float finally by sand filter (9).
8. coking wastewater containing phenol and cyanide advanced treatment process according to claim 7, it is characterized in that: the first lattice pond of dosing pond (1) adds hydrochloric acid, second lattice pond pH meter automatically controls the chemical feeding quantity of the first lattice, control the pH in the second lattice pond at 2-4, 3rd lattice pond adds iron salt, iron salt is chlorate ferrum or ferrous sulfate, the dosage of iron salt is at 200mg/L-400mg/L, hydrogen peroxide is added again in the 4th lattice pond, the dosage of hydrogen peroxide is at 1500mg/L-2500mg/L, the time of staying in each pond is 3-5min, each pond mixes each through aeration agitation.
9. coking wastewater containing phenol and cyanide advanced treatment process according to claim 7, is characterized in that: quickly agitating reaction pond (2) adopts aeration agitation mixing, and the water time of staying in pond is 1h-2.5h, sets multiple baffle plate and prevent the short stream of water in pond；Stirring at low speed reaction tank (3) adopts mechanical type reaction tank, is 1h-2.5h during water stop in pond, sets 3 gears-4 and keep off blenders in pond；Sedimentation tank (4) adopts vertical sedimentation basin and width flow settling pond, and the water effective time of staying in pond is 2-3h；Sedimentation tank (4) supernatant enters back into first order reaction pond (5), first order reaction pond (5) add special decolouring alkali, controlling the pH in first order reaction pond (5) at 8-11, the water time of staying in first order reaction pond (5) is 15min-30min；First order reaction pond (5) water outlet enters aerated reaction pond (6), and the pH after aerated reaction is at 8.0-9.0, and the water effective time of staying in aerated reaction pond (6) is 4h-5h；Aerated reaction pond (6) water outlet enters back into secondary response pond (7), secondary response pond (7) is made up of 4 lattice, the time of staying in every reaction grid pond is 3-5min, first reaction grid pond, the second reaction grid pond adopt strong aeration agitation, 3rd reaction grid pond, the 4th reaction grid pond adopt slow mechanical stirring, add PAC and PAM again and carry out flocculation reaction, flco is made to become bigger suspended granular sludge, first reaction grid pond adds the dosage of PAC, PAC at 100mg/L-400mg/L.Second reaction grid pond adds PAM, the dosage of PAM, at 0.5mg/L-5mg/L, is adding Powdered Activated Carbon in the 4th reaction grid pond, and Powdered Activated Carbon and water are uniformly mixed to form suspension, adding further adsorption fouling material by dosing pump, dosage is at 200mg/L-500mg/L；Secondary response pond (7) water outlet enters tube settler (8), and the water effective time of staying in pond is 2h-3h；Tube settler (8) water outlet removes float further in entrance sand filter (9), pond is loaded the quartz sand of different-diameter, the water effective time of staying in pond is 15min-20min, and controlling water flow velocity in pond is 5.5m/h-7.5m/h.
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| CN112723693A (en) * | 2020-12-18 | 2021-04-30 | 长沙坚诺环境科技有限公司 | Method for biochemically treating town sewage in cooperation with sludge reduction |
| CN112723693B (en) * | 2020-12-18 | 2022-03-29 | 长沙坚诺环境科技有限公司 | Method for biochemically treating town sewage in cooperation with sludge reduction |
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