CN107814461A - The processing unit and method of a kind of cyanide containing wastewater - Google Patents

The processing unit and method of a kind of cyanide containing wastewater Download PDF

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Publication number
CN107814461A
CN107814461A CN201711110864.9A CN201711110864A CN107814461A CN 107814461 A CN107814461 A CN 107814461A CN 201711110864 A CN201711110864 A CN 201711110864A CN 107814461 A CN107814461 A CN 107814461A
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CN
China
Prior art keywords
cyanide
waste water
containing wastewater
water
precipitation
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CN201711110864.9A
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Chinese (zh)
Inventor
徐富
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SUZHOU SUWATER ENVIRONMENTAL SCIENCE AND TECHNOLOGY Co Ltd
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SUZHOU SUWATER ENVIRONMENTAL SCIENCE AND TECHNOLOGY Co Ltd
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Priority to CN201711110864.9A priority Critical patent/CN107814461A/en
Publication of CN107814461A publication Critical patent/CN107814461A/en
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water, or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/02Treatment of water, waste water, or sewage by heating
    • C02F1/04Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/38Treatment of water, waste water, or sewage by centrifugal separation
    • C02F1/385Treatment of water, waste water, or sewage by centrifugal separation by centrifuging suspensions
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/66Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F2001/007Processes including a sedimentation step
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/16Nitrogen compounds, e.g. ammonia
    • C02F2101/18Cyanides
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/02Aerobic processes
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/28Anaerobic digestion processes

Abstract

The invention discloses a kind of processing unit of cyanide containing wastewater and method, wherein method comprises the following steps:(1) cyanide containing wastewater enters broken cyanide reactor removal cyanide;(2) water outlet of broken cyanide reactor enters precipitation and intermediate pool carries out natural subsidence;(3) after waste water is repeatedly evaporated in triple effect evaporator, solid is discharged into Sedimentation centrifugel and carries out separation of solid and liquid;(4) ground flushing water and sanitary sewage are mixed in collecting-tank, and combined sewage is mixed to get in distribution reservoir with steam condensate (SC) and centrifuge waste water;(5) combined sewage is reacted into anaerobic tower;(6) anaerobic tower water outlet is reacted into CASS ponds;(7) supernatant in CASS ponds enters ozone pond, by ozone with thoroughly remove it is outer after the cyanide in waste water drain into sewage plant, biogas caused by anaerobic tower is collected into methane utilizing system.Processing method provided by the invention, the qualified discharge containing cyanide in high cyanide containing wastewater can be achieved, then drain into sewage plant.

Description

The processing unit and method of a kind of cyanide containing wastewater
Technical field
The present invention relates to technical field of waste water processing, the processing unit and method of more particularly to a kind of cyanide containing wastewater.
Background technology
Cyanide is extremely toxic substance, and the life of health and livestock, fish to the mankind is all a kind of serious threat.Containing cyanogen Waste water is divided into high cyanide containing wastewater, low cyanide wastewater, and the biochemical processing of current cyanide wastewater is used for low concentration Wastewater treatment, and the load that can be born is small.Thus limit the biochemical treatment of cyanide wastewater.And the high concentration containing cyanogen of high concentration The independent materializing strategy expense of waste water is too high, produces the solid dangerous waste of substantial amounts of secondary pollution.The present invention is therefore.
The content of the invention
Based on above mentioned problem, it is an object of the present invention to provide a kind of processing method of cyanide containing wastewater, and it can realize highly concentrated Spend the qualified discharge of Cyanide in Cyanide Wastewater.
It is to solve one of the problems of the prior art, technical scheme provided by the invention:
A kind of processing unit of cyanide containing wastewater, stoste accumulator tank, the broken cyanide that it includes being sequentially connected by pipeline are anti- Answer kettle, precipitation and intermediate pool, triple effect evaporator, Sedimentation centrifugel, distribution reservoir, anaerobic tower, CASS ponds and ozone pond, institute State precipitation and intermediate pool is connected to precipitation solid slag bath.Further, the upstream of the regulating reservoir water inlet end is provided with grid.
Further, the water inlet end of the distribution reservoir is connected to the collecting-tank for being stored with flushing water and sanitary sewage.
Further, the distillation condensed water of the triple effect evaporator is discharged into the distribution reservoir.
Further, first added in the broken cyanide reactor calcium hypochlorite, calcium oxide reaction a period of time, after having reacted It is passed through ozone reaction for a period of time.
Further, the sediment of the precipitation solid slag bath is handled by plate compression.
Further, between the stoste holding tank and the broken cyanide reactor, precipitation and intermediate pool and the triple effect Elevator pump is respectively equipped with pipeline between evaporator, between the collecting-tank and the distribution reservoir.
In order to solve the problems of the prior art, the two of technical scheme provided by the invention is:
A kind of processing method of cyanide containing wastewater, it comprises the following steps:
(1) cyanide containing wastewater enters broken cyanide reactor removal cyanide;
(2) water outlet of broken cyanide reactor enters precipitation and intermediate pool carries out natural subsidence, and precipitation is discharged into precipitation solid slag bath, Supernatant is discharged into triple effect evaporator;
(3) after waste water is repeatedly evaporated in triple effect evaporator, obtain distilling condensed water, solid mixture is discharged into sedimentation Filtering centrifuge carries out separation of solid and liquid, produces solid salt accessory substance and centrifuge waste water;
(4) distillation condensation waste water and centrifuge waste water are mixed to get with ground flushing water, sanitary sewage into distribution reservoir and mixed Sewage;
(5) combined sewage enters anaerobic tower, and the organic matter reaction in the anaerobic bacteria and waste water in anaerobic tower, organic matter is detested Oxygen bacterium, which is decomposed, to be utilized, and most of polluter is converted into water and carbon dioxide, while produces biogas, finally completes gas-solid-liquid Separation;
(6) anaerobic tower water outlet enters CASS ponds, the organic matter reaction in the aerobic bacteria and waste water in CASS ponds, reduces waste water COD;
(7) supernatant in CASS ponds enters ozone pond, by ozone thoroughly to remove outer after the cyanide in waste water arrange To sewage plant, biogas caused by anaerobic tower is collected into methane utilizing system.
Further, the reaction temperature that broken cyanide reactor is controlled in the step (1) is 60-62 DEG C, pH 11-12.
Further, calcium hypochlorite, calcium oxide reaction a period of time are first added in the step (1) in broken cyanide reactor Afterwards, ozone reaction is added for a period of time, it is possible to achieve chlorate anions removes the cyanide in waste water with ozone cooperative.
Further, the reaction time of calcium hypochlorite, calcium oxide and waste water is 25-30min in the step (1), ozone Reaction time with waste water is 5-10min.
Further, the step (2) is after broken cyanide reacts, and calcium chlorate becomes calcium chloride after reaction, simultaneously meeting There is certain calcium chloride precipitation, the solid slag of precipitation solid slag bath is handled by plate and frame filter press press filtration.
The salt content of waste water increases, it is necessary to which by repeatedly evaporating desalination, salt becomes solid precipitation, steamed in the step (3) Lime set of feeling cold mixes with centrifuge waste water, the salt content of composite waste is reduced to 2000-3000mg/L, reaches in sewage disposal The tolerance range of environmental microorganism.
Further, the temperature that distribution reservoir is controlled in the step (4) is 37~39 DEG C, and pH is 7~8.
Compared with prior art, it is an advantage of the invention that:
Using technical scheme, after cyanide wastewater is first by broken cyanide, then with ozone cooperative oxidation processes, make cyanogen Compound is oxidized to relatively low level.Then the waste water after broken cyanide and precipitation produces solid salt byproduct by triple effect evaporation, containing The solid dangerous waste of cyanogen becomes available solid salt byproduct, reduces cost;Then by steaming caused by triple effect evaporation Evaporate condensation waste water to mix with ground flushing water and sanitary sewage, improve the biodegradability of comprehensive wastewater, while reduce synthesis The basicity of waste water, in order to follow-up biochemical treatment, from the qualified discharge for realizing cyanide in high cyanide containing wastewater, reduce The secondary pollution of solid dangerous waste.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment Accompanying drawing be briefly described, drawings in the following description are only some embodiments of the present invention, for the common skill in this area For art personnel, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of structural representation of the processing unit of cyanide containing wastewater of the present invention.
Embodiment
Such scheme is described further below in conjunction with specific embodiment.It should be understood that these embodiments are to be used to illustrate The present invention and be not limited to limit the scope of the present invention.The implementation condition used in embodiment can be done according to the condition of specific producer Further adjustment, unreceipted implementation condition is usually the condition in normal experiment.
Referring to Fig. 1, for the structural representation of the embodiment of the present invention, there is provided a kind of processing unit of cyanide containing wastewater, bag Include the stoste accumulator tank being sequentially connected by pipeline, broken cyanide reactor, precipitation and intermediate pool, triple effect evaporator, sedimentation filtration Centrifuge, distribution reservoir, anaerobic tower, CASS ponds and ozone pond, precipitation and intermediate pool are connected to precipitation solid slag bath.
Wherein, the water inlet end of distribution reservoir is connected to the collecting-tank for being stored with flushing water and sanitary sewage.Triple effect evaporator Distillation condensed water is discharged into the distribution reservoir.Calcium hypochlorite, calcium oxide reaction a period of time are first added in broken cyanide reactor, has been reacted It is being passed through ozone reaction for a period of time afterwards.The sediment of precipitation solid slag bath is handled by plate compression.
Between stoste holding tank and broken cyanide reactor, precipitation and intermediate pool and triple effect evaporator between, the collecting-tank Elevator pump is respectively equipped with pipeline between distribution reservoir.
Comprised the following steps using the processing method of said apparatus:
(1) cyanide containing wastewater enters broken cyanide reactor removal cyanide:Cyanide containing wastewater is discharged into stoste storage first Groove stores, and is then pumped into broken cyanide reactor and reacted by elevator pump, and the reaction temperature for controlling broken cyanide reactor is 60-62 DEG C, PH is 11-12, and broken cyanide reactor Central Plains pH containing cyanide is 1-2, first adds calcium hypochlorite, calcium oxide reaction 25-30min, adds Enter ozone reaction 5-10min, to remove the cyanide in waste water in below 20mg/L.
(2) broken cyanide reactor water outlet gravity flow enters precipitation and intermediate pool carries out natural subsidence, and precipitation is discharged into precipitation solid Slag bath, the solid slag of precipitation solid slag bath are handled by plate and frame filter press press filtration, and the boosted pump of supernatant is pumped into triple effect evaporator, removes Reactant salt;
(3) obtain distilling condensed water after waste water is repeatedly evaporated in triple effect evaporator, solidliquid mixture is discharged into sedimentation Filtering centrifuge carries out separation of solid and liquid, produces solid salt accessory substance and centrifuge waste water, and solid salt accessory substance is inorganic salts, Ran Houshou Collection utilizes;
(4) distillation condensation waste water and centrifuge waste water are mixed to get mixed from inflow distribution reservoir with ground flushing water, sanitary sewage Close sewage:The temperature for controlling distribution reservoir is 37~39 DEG C, and pH is 7~8, and wherein flushing waste water and sanitary sewage is discharged into collecting-tank, Then boosted pump is pumped into distribution reservoir to give up with distillation condensation and mixed;
(5) combined sewage enters anaerobic tower, and the organic matter reaction in the anaerobic bacteria and waste water in anaerobic tower, organic matter is detested Oxygen bacterium, which is decomposed, to be utilized, and most of polluter is converted into water and carbon dioxide, while produces biogas, finally completes gas-solid-liquid Separation;
(6) anaerobic tower water outlet enters CASS ponds, ensure CASS ponds in aeration oxygen in water in 3mg/L or so, sludge SV30Organic matter reaction in aerobic bacteria and waste water in 30 or so, CASS ponds, reduce the COD of waste water;
(7) supernatant in CASS ponds enters ozone pond, by ozone thoroughly to remove cyanide remaining in waste water after Sewage plant is drained into outside, biogas caused by anaerobic tower is collected into methane utilizing system.
Exemplified by containing concentration of cyanide for 1600mg/L waste water, cyanide in the waste water clearance in broken cyanide reactor For more than 98.75%, below 20mg/L is dropped to from 1600mg/L, 2000- is reduced to by vapo(u)rization system concentrating salt-containing amount 3000mg/L.Then below 2mg/L is dropped to from 20mg/L or so by anaerobic tower and CASS biochemical systems again, finally by smelly Oxygen pond is handled, and removes remaining cyanide, it is ensured that the content of cyanide is in 1mg/L implemented below qualified discharges.
Cyanide containing wastewater COD concentration after the processing of broken cyanide reactor is 20000mg/L or so, and evaporation system is pumped into by pump After system, COD degradation more than 90%, effluent COD concentration is 2000mg/L or so.Ground flushing water and sanitary sewage condense with distillation After waste water mixing, the COD of waste water is 1000mg/L or so in distribution reservoir.Pass through COD degradation after anaerobic tower 50% or so, anaerobism The COD concentration of reactor water outlet is 500mg/L or so, passes through COD degradation more than 50% behind CASS ponds, the COD of CASS ponds water outlet Concentration is below 300mg/L, realizes the COD of waste water and the qualified discharge of cyanide.
The foregoing examples are merely illustrative of the technical concept and features of the invention, its object is to allow the person skilled in the art to be Present disclosure can be understood and implemented according to this, it is not intended to limit the scope of the present invention.It is all smart according to the present invention The equivalent transformation or modification that refreshing essence is done, should all be included within the scope of the present invention.

Claims (10)

  1. A kind of 1. processing unit of cyanide containing wastewater, it is characterised in that:Including be sequentially connected by pipeline stoste accumulator tank, Broken cyanide reactor, precipitation and intermediate pool, triple effect evaporator, Sedimentation centrifugel, distribution reservoir, anaerobic tower, CASS ponds and smelly Oxygen pond, the precipitation and intermediate pool are connected to precipitation solid slag bath.
  2. 2. the processing unit of cyanide containing wastewater according to claim 1, it is characterised in that:The water inlet end of the distribution reservoir It is connected to the collecting-tank for being stored with flushing water and sanitary sewage.
  3. 3. the processing unit of cyanide containing wastewater according to claim 1, it is characterised in that:The steaming of the triple effect evaporator Evaporate condensed water and be discharged into the distribution reservoir.
  4. 4. a kind of processing method of cyanide containing wastewater, it is characterised in that comprise the following steps:
    (1) cyanide containing wastewater enters broken cyanide reactor removal cyanide;
    (2) water outlet of broken cyanide reactor enters precipitation and intermediate pool carries out natural subsidence, and sediment is discharged into precipitation solid slag bath, on Clear liquid is discharged into triple effect evaporator;
    (3) after waste water is repeatedly evaporated in triple effect evaporator, obtain distilling condensed water, solidliquid mixture is discharged into sedimentation filtration Centrifuge carries out separation of solid and liquid, produces solid salt accessory substance and centrifuge waste water;
    (4) distill condensed water and centrifuge waste water enters distribution reservoir and is mixed to get combined sewage with ground flushing water, sanitary sewage;
    (5) combined sewage enters anaerobic tower, and the organic matter reaction in the anaerobic bacteria and waste water in anaerobic tower, organic matter is by anaerobic bacteria Decompose and utilize, most of polluter is converted into water and carbon dioxide, while produce biogas, finally complete gas-solid-liquid point From;
    (6) anaerobic tower water outlet enters CASS ponds, the organic matter reaction in the aerobic bacteria and waste water in CASS ponds, reduces waste water COD;
    (7) supernatant in CASS ponds enters ozone pond, by ozone with remove it is outer after the cyanide in waste water drain into sewage plant, Biogas is collected into methane utilizing system caused by anaerobic tower.
  5. 5. the processing method of cyanide containing wastewater according to claim 4, it is characterised in that:Controlled in the step (1) The reaction temperature of broken cyanide reactor is 60-62 DEG C, pH 11-12.
  6. 6. the processing method of cyanide containing wastewater according to claim 5, it is characterised in that:Broken cyanide in the step (1) Reactor Central Plains pH containing cyanide is 1-2, first add calcium hypochlorite, calcium oxide reaction a period of time, after having reacted be passed through it is smelly Oxygen reaction a period of time.
  7. 7. the processing method of cyanide containing wastewater according to claim 6, it is characterised in that:Time chlorine in the step (1) The reaction time of sour calcium, calcium oxide and waste water is 25-30min, and the reaction time of ozone and waste water is 5-10min.
  8. 8. the processing method of cyanide containing wastewater according to claim 4, it is characterised in that:The step (2) is by broken After cyanogen reaction, calcium chlorate becomes calcium chloride after reaction, while has certain calcium chloride precipitation, and precipitation solid slag bath is consolidated Slag is handled by plate and frame filter press press filtration.
  9. 9. the processing method of cyanide containing wastewater according to claim 4, it is characterised in that:Waste water in the step (3) Salt content increase, it is necessary to by repeatedly evaporating desalination, salt becomes solid precipitation, and evaporation condensate is mixed with centrifuge waste water, made The salt content of composite waste reaches the tolerance range of environmental microorganism in sewage disposal.
  10. 10. the processing method of cyanide containing wastewater according to claim 4, it is characterised in that:Controlled in the step (4) The temperature of distribution reservoir is 37~39 DEG C, and pH is 7~8.
CN201711110864.9A 2017-11-10 2017-11-10 The processing unit and method of a kind of cyanide containing wastewater Pending CN107814461A (en)

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Application Number Priority Date Filing Date Title
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CN107814461A true CN107814461A (en) 2018-03-20

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110902894A (en) * 2019-12-16 2020-03-24 广州市真爱环保科技有限公司 Cyanide-containing wastewater treatment system and method
CN110950502A (en) * 2019-12-24 2020-04-03 惠州Tcl环境科技有限公司 Method for cooperatively treating potassium ferricyanide-containing wastewater by utilizing ferric trichloride etching waste liquid

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110902894A (en) * 2019-12-16 2020-03-24 广州市真爱环保科技有限公司 Cyanide-containing wastewater treatment system and method
CN110950502A (en) * 2019-12-24 2020-04-03 惠州Tcl环境科技有限公司 Method for cooperatively treating potassium ferricyanide-containing wastewater by utilizing ferric trichloride etching waste liquid

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