CN105948329A - Treatment device and method for mercury-containing wastewater in chlor-alkali industry - Google Patents
Treatment device and method for mercury-containing wastewater in chlor-alkali industry Download PDFInfo
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- CN105948329A CN105948329A CN201610483533.9A CN201610483533A CN105948329A CN 105948329 A CN105948329 A CN 105948329A CN 201610483533 A CN201610483533 A CN 201610483533A CN 105948329 A CN105948329 A CN 105948329A
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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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- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- 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
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- 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
-
- 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
-
- 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
- C02F1/70—Treatment of water, waste water, or sewage by reduction
- C02F1/705—Reduction by metals
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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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 relates to a treatment device and a method for mercury-containing wastewater in the chlor-alkali industry. The treatment device comprises a grid tank 1, an adjusting tank 2, a first-order reaction tank 3, a second-order reaction tank 4, a settling pond 5, a disinfecting tank 6 and a sludge tank 7 which are connected in series in sequence, and further comprises a nano zero-valent iron preparation tank 8, wherein the nano zero-valent iron preparation tank 8 is connected with the first-order reaction tank 3 and the second-order reaction tank 4 through pipelines respectively; a coagulant preparation tank 9 and a tank type filter 11 are connected with a sterilization tank 6 through a pipeline mixer 13; the tank type filter 11 is connected with a storage tank 12 later. A materialization treatment process is adopted, so that the heavy metal mercury in wastewater can be efficiently removed, and stable up-to-standard emission can be achieved; the treatment device is good in impact resistance, so that variation of water amounts and water quality can be adapted; due to concentrated control and automatic operation, the treatment device is easy to manage; the mercury-containing wastewater can be economically and efficiently treated to meet the standard, and the purposes of energy conservation, consumption reduction and emission reduction can be met.
Description
Technical field
The invention belongs to industrial waste water treatment, be specifically related to the processing means of a kind of chlor-alkali industry mercury-containing waste water
And method.
Background technology
Chlor-alkali industry is the chemical production field that China is important, and its product almost relates to each of national economy and people's lives
Individual field, but its production process exists the chemical products relevant with hydrargyrum, and owing to management and the use of hydrargyrum are not good at, oneself is to outside
Environment causes mercury pollution, and the health and natural, ecological to the people causes the biggest harm.Such as: use hydrargyrum soda processes raw
Produce in chlor-alkali process, because of the restriction of production technology, substantial amounts of mercury-containing waste water and mercurous brine sludge can be produced.Although China is in " ten
During five " eliminate hydrargyrum soda processes, but the wastewater problem of hydrargyrum soda processes discharge yet suffers from, and its harm can not be ignored.
Use chemical precipitation, coagulation, ion to exchange at present, adsorb, reduce and the method such as membrance separation processes the hydrargyrum in waste water.
But, these method operating costs are high, clearance is relatively low or easily causes secondary pollution, in the urgent need to developing the new of Mercury in Wastewater
Treatment technology.
Chinese patent (201110154924.3) " a kind of method processing high chlorine mercury containing waste water in chlor-alkali industry and system thereof "
Disclose a kind of method processing high chlorine mercury containing waste water in chlor-alkali industry and system thereof, including, include wastewater collection pond, dosing system
System, intake pump, retort, preseparator, header tank, ultrafiltration feed pump, ultrafiltration system, the pipeline of the aforementioned each unit of connection, profit
Adsorb with the macromolecule intercalating agent rich in amino and carboxyl and the heavy metal Hg in waste water removed by ultrafilter membrane.This patent is directed to
Chlor-alkali industry acetylene method produces the high chlorine mercury-containing waste water administering method that vinyl chloride produces, and its technological core is macromolecule intercalating agent
Absorption, relatively costly, and the problem that there is secondary pollution.
Chinese patent (201110262596.9) " mercury-containing waste water treatment methods of a kind of chemically based sedimentation method " discloses
The mercury-containing waste water treatment method of a kind of chemically based sedimentation method, including hydrargyrum process, prepared by precipitant, hydrargyrum flocculant for treating is prepared, just
Secondary chemical precipitation process and degree of depth chemical precipitation.This patented technology core is hydrargyrum precipitant and the preparation of hydrargyrum flocculant and use,
The preparation of hydrargyrum precipitant employs SO4 2-、NH4H2PO4、CO(NH2)2、CH3CH2OH and sulfate reduction strain, hydrargyrum flocculant is
Ferrous sulfate aqueous solution.Its hydrargyrum precipitant preparation process employs multiple chemical drugs, and preparation flow is complicated, uses operation
Inconvenience, the problem that there is secondary pollution.
Chinese patent (201210521138.7) " a kind of by the method for mercury-containing waste water in two-step method process PVC production "
Disclose a kind of by the method for mercury-containing waste water in two-step method process PVC production.This patented technology core is precipitant, flocculation
Agent is to Mercury in Wastewater adsorption precipitation, and follow-up board-like kieselguhr filters removes remaining suspension thing.Precipitant is calcium chloride, hydroxide
Calcium, calcium acetate, alkali metal sulphide, metal acid sulfide, (NH4)2S ；Flocculant is aluminium polychlorid and polyacrylamide
Amine.Its hydrargyrum precipitant preparation process employs multiple chemical drugs, and preparation flow is complicated, use operation inconvenience, have two
The problem of secondary pollution.
Chinese patent (201220182636.9) " device of a kind of full automatic treatment chlor-alkali industry mercury-containing waste water " discloses
A kind of device of full automatic treatment chlor-alkali industry mercury-containing waste water, including: wastewater storage tank, clean water tank, membranous system and medicine system.Should
Patented technology core is dosing (acid-alkali accommodation, precipitant, aluminium polychlorid), and membranous system filters.This plant running cost is high, and
Process mercury-containing waste water overall efficiency relatively low.
Summary of the invention
For existing treatment technology above shortcomings, it is an object of the invention to provide a kind of clearance height, be processed into
This is the lowest, the processing means of the chlor-alkali industry mercury-containing waste water of non-secondary pollution and method.
The technical solution of the present invention is: the processing means of a kind of chlor-alkali industry mercury-containing waste water, arranges grid pond, regulation
Pond, first class reaction pot, secondary response tank, sedimentation tank, sterilization pool, sludge-tank are sequentially connected in series, and also set up nano zero valence iron and prepare pond,
Described nano zero valence iron is prepared pond and is connected with first class reaction pot, secondary response tank respectively by pipeline.
Further, the processing means of a kind of chlor-alkali industry mercury-containing waste water be additionally provided with coagulant prepare pond, pot type filter
Device, pond prepared by described coagulant, tank filter connects sterilization pool by pipe-line mixer.
Further, the processing means of a kind of chlor-alkali industry mercury-containing waste water is additionally provided with disinfectant and prepares pond, described sterilization
Agent is prepared pond and is connected with sterilization pool by pipeline.
Further, described tank filter follow-up connection storage pool.
Further, described first class reaction pot, secondary response pot bottom are equipped with action of forced stirring equipment.
Further, the built-in pressure detector of described tank filter, backwash filter module, filtration system bears pressure
Reach to would automatically turn on during threshold values backwash filter module, it is achieved filter and backwash high level automatization.
Further, inside described tank filter, it is provided with water-locator and modified active carbon filterbed, in main removal waste water
Float and other subparticles.
Further, described modified active carbon filterbed dress is sulfur loading active carbon.
Further, described sedimentation tank is vertical sedimentation basin, is provided with taper and sinks bucket at the bottom of pond, and Chi Ding is provided with overflow
Weir, suspended substance sedimentation enters pond base cone shape and sinks in bucket, and primary water flows out from pond surrounding peripherally downflow weir.
Further, described action of forced stirring equipment is diving mixer.
Described regulating reservoir is provided with top cover, uses glass reinforced plastic movable cover plate, has that enclosed type is good, corrosion-resistant, ageing-resistant, makes
By features such as life-span length, economic benefit height.
In type of the present invention, nano zero valence iron removes heavy metal in waste water hydrargyrum mainly two kinds of mechanism: one is that oxidoreduction is made
With, hydrargyrum in waste water can with 0 ,+1 ,+2 valence exist, the hydrargyrum of high-valence state can be reduced to Elemental Mercury and remove by nano zero valence iron；
Two is absorption, coagulation or co-precipitation, and nano zero valence iron is easily converted to divalent/trivalent compound in water, and these are high
The iron compound of valence state and Zero-valent Iron heavy metal hydrargyrum have certain absorption, coagulation or co-precipitation, and then remove waste water
In heavy metal Hg.
Wherein, Zero-valent Iron is as follows with the redox reaction mechanism of heavy metal Hg:
。
In the present invention, in tank filter, the middle modified activated carbon used is sulfur loading active carbon, the adsorptivity of sulfur loading active carbon
Normal activated carbon can be significantly better than.
Sulfur loading active carbon removes heavy metal in waste water hydrargyrum mainly two kinds of mechanism: one is the physical absorption work of activated carbon itself
With, gap structure heavy metal hydrargyrum flourishing in activated carbon has stronger absorption property；Two is the change of sulfenyl in sulfur loading active carbon
Learn adsorption, sulfur loading active carbon void has a lot of S-C chemical bond, and sulfenyl and heavy metal Hg are to occur chemistry anti-
Answering, its reaction mechanism is as follows:
。
Chlor-alkali industry mercury-containing waste water treatment method, comprises the steps:
Step 1: chlor-alkali industry mercury-containing waste water enters regulating reservoir after mechanical grille, waste water obtains all and regulation at regulating reservoir
Process；
Step 2: regulating reservoir water outlet pumps into first class reaction pot, secondary response tank successively, two-stage reaction tank is used in conjunction in removal waste water
Heavy metal Hg and float；
Step 3: secondary response tank water outlet enters sedimentation tank, and mud is precipitated at sedimentation tank, and precipitating sludge pumps into sludge-tank, heavy
Behind shallow lake, waste water enters sterilization pool sterilization；
Step 4: after sterilization, waste water and coagulant are prepared the coagulant prepared in pond and be sufficiently mixed in pipe-line mixer, enters pot type
In filter, filtering the float and other subparticles removed in waste water, after filtration, clear water entrance storage pool stores temporarily,
Rear outer row.
The mud periodic cleaning outward transport of described sludge-tank accumulation.
In described sterilization pool, disinfectant is sodium hypochlorite.
Beneficial effects of the present invention is as follows:
(1) using " materialization " to process technique, efficiently remove the heavy metal Hg in waste water, stably reaching standard discharges；
(2) there is good anti impulsion load ability, to adapt to the change of the water yield, water quality；
(3) centralized Control, automatic operating are used, it is easy to management；
(4) technique is advanced reliable, automaticity high, and management is safeguarded simple, low energy consumption, low fault, it is possible to economical and efficient general
Mercury-containing waste water processes up to standard, accomplish energy-conservation, lower consumption, reduce discharging.
Accompanying drawing explanation
Fig. 1 is a kind of chlor-alkali industry mercury-containing waste water processing means structural representation.
In figure: 1-grid pond；2-regulating reservoir；3-first class reaction pot；4-secondary response tank；5-sedimentation tank；6-sterilization pool；7-
Sludge-tank；8-nano zero valence iron prepares pond；Pond prepared by 9-coagulant；10-disinfectant prepares pond；11-tank filter；12-stores up
Deposit pond；13-pipe-line mixer；14,15,16-valves；17,18,19-dosing pumps；20,21,22-pumps.
Detailed description of the invention
Below in conjunction with the accompanying drawings the present invention is described further.
Such as Fig. 1, a kind of device processing chlor-alkali industry mercury-containing waste water, it is adaptable to process chlor-alkali industry mercurous, containing float
Waste water.
The processing means of a kind of chlor-alkali industry mercury-containing waste water, arranges grid pond 1, regulating reservoir 2, first class reaction pot 3, two grades instead
Answer tank 4, sedimentation tank 5, sterilization pool 6, sludge-tank 7 to be sequentially connected in series, also set up nano zero valence iron and prepare pond 8, described nano zero valence iron
Preparation pond 8 is connected with first class reaction pot 3, secondary response tank 4 respectively by pipeline, is provided with valve 14, meter connecting on pipeline
Amount pump 17.
Pond 9 prepared by coagulant, tank filter 11 connects sterilization pool 6 by pipe-line mixer 13, sets on pipeline connecting
It is equipped with valve 15, dosing pump 18.
Disinfectant is prepared pond 10 and is connected with sterilization pool 6 by pipeline, is provided with valve 16, dosing pump connecting on pipeline
19。
Pump 21 is set in the bottom of sedimentation tank 5, pump 22 is set in the bottom of sterilization pool 6, in tank filter 11 and storage
On the connection pipeline in pond 12, pump 20 is set.
Tank filter 11 follow-up connection storage pool 12, is arranged on the tank filter 11 connection pipeline with storage pool 12
Pump 20.
Chlor-alkali industry mercury-containing waste water treatment method is as follows.
Chlor-alkali industry mercury-containing waste water enters regulating reservoir 2 after grid pond 1 is filtered, control and regulation pond pH value be positioned at 6-9 it
Between.
Regulating reservoir 2 water outlet sequentially enters first class reaction pot 3, secondary response tank 4.
It is that 3:1-15:1 controls chemical feeding quantity according to the mol ratio of nano zero valence iron with Mercury in Wastewater, slowly notes in retort
Entering Nanoscale Iron confection, nano zero valence iron and waste water use diving mixer action of forced stirring, nano zero valence iron oxidation also
Under former, absorption, coagulation or co-precipitation, remove the heavy metal Hg in waste water；Secondary response tank 4 water outlet is from flowing into sedimentation tank 5.
Sedimentation tank 5 is vertical sedimentation basin, and utilization is gravity settling separation principle；Waste water stream after precipitation in sedimentation tank 5
Entering in sterilization pool 6, excess sludge is entered in sludge-tank 7 by sludge pump 21 after precipitating in sedimentation tank 5；After sterilization, waste water passes through
It is sufficiently mixed with coagulant during pipe-line mixer 13, subsequently in tank filter 11, tank filter 11 backwash water outlet
Being back in sedimentation tank 5, tank filter 11 water outlet enters storage pool 12 and stores temporarily, last outer row.
The chlor-alkali industry mercury-containing waste water processing means Design Treatment water yield scope of the present invention is 0-800m3/ d, design load is
500 m3/d.Design influent quality be total mercury 10 mg/L:, pH:6-9, SS:200 mg/L, design effluent quality is total mercury:
0.02mg/L, pH:6-9, SS:20 mg/L.
Claims (10)
1. a processing means for chlor-alkali industry mercury-containing waste water, arrange grid pond (1), regulating reservoir (2), first class reaction pot (3), two
Order reaction tank (4), sedimentation tank (5), sterilization pool (6), sludge-tank (7) are sequentially connected in series, it is characterised in that also set up nano zero valence iron
Preparation pond (8), described nano zero valence iron prepares pond (8) by pipeline respectively with first class reaction pot (3), secondary response tank (4) even
Connect.
The processing means of a kind of chlor-alkali industry mercury-containing waste water the most according to claim 1, it is characterised in that be additionally provided with mixed
Pond (9), tank filter (11) are prepared in solidifying agent, and pond (9) prepared by described coagulant, tank filter (11) passes through pipe-line mixer
(13) sterilization pool (6) is connected；Described tank filter (11) follow-up connection storage pool (12).
The processing means of a kind of chlor-alkali industry mercury-containing waste water the most according to claim 1, it is characterised in that be additionally provided with and disappear
Toxic agent prepares pond (10), and described disinfectant is prepared pond (10) and is connected with sterilization pool (6) by pipeline.
The processing means of a kind of chlor-alkali industry mercury-containing waste water the most according to claim 1, it is characterised in that described one-level is anti-
Answering tank (3), secondary response tank (4) bottom equipped with action of forced stirring equipment, described action of forced stirring equipment is diving mixer.
A kind of device processing chlor-alkali industry mercury-containing waste water the most according to claim 1, it is characterised in that described pot type mistake
Filter (11) built-in pressure detector, backwash filter module.
A kind of device processing chlor-alkali industry mercury-containing waste water the most according to claim 1, it is characterised in that described pot type mistake
Internal water-locator and the modified active carbon filterbed of being provided with of filter (11), described modified active carbon filterbed dress is sulfur loading active carbon.
A kind of device processing chlor-alkali industry mercury-containing waste water the most according to claim 1, it is characterised in that described sedimentation tank
(5) being vertical sedimentation basin, be provided with taper and sink bucket at the bottom of pond, Chi Ding is provided with downflow weir.
8. at the chlor-alkali industry mercury-containing waste water of the processing means of the employing a kind of chlor-alkali industry mercury-containing waste water described in claim 1-7
Reason method, its characterization step includes:
Step 1: chlor-alkali industry mercury-containing waste water enters regulating reservoir (2) after mechanical grille pond (1), waste water obtains at regulating reservoir (2)
To all processing with regulation；
Step 2: regulating reservoir (2) water outlet pumps into first class reaction pot (3), secondary response tank (4) successively, and two-stage reaction tank is used in conjunction removal
Heavy metal Hg in waste water and float；
Step 3: secondary response tank (4) water outlet enters sedimentation tank (5), and mud is precipitated at sedimentation tank (5), and precipitating sludge pumps into
Sludge-tank (7), after precipitation, waste water enters sterilization pool (6) sterilization；
Step 4: after sterilization, waste water and coagulant are prepared the coagulant prepared in pond (9) and be sufficiently mixed in pipe-line mixer (13),
Entering in tank filter (11), filter the float and other subparticles removed in waste water, after filtration, clear water enters and stores
Pond stores temporarily, last outer row.
Chlor-alkali industry mercury-containing waste water treatment method the most according to claim 8, it is characterised in that in nano zero valence iron and waste water
The mol ratio of hydrargyrum is that 3:1-15:1 controls chemical feeding quantity.
Chlor-alkali industry mercury-containing waste water treatment method the most according to claim 8, it is characterised in that described sterilization pool disappears in (6)
Toxic agent is sodium hypochlorite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610483533.9A CN105948329A (en) | 2016-06-28 | 2016-06-28 | Treatment device and method for mercury-containing wastewater in chlor-alkali industry |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610483533.9A CN105948329A (en) | 2016-06-28 | 2016-06-28 | Treatment device and method for mercury-containing wastewater in chlor-alkali industry |
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| CN201610483533.9A Pending CN105948329A (en) | 2016-06-28 | 2016-06-28 | Treatment device and method for mercury-containing wastewater in chlor-alkali industry |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108687114A (en) * | 2018-05-16 | 2018-10-23 | 扬州杰嘉工业固废处置有限公司 | A kind of Organomercurial waste is stable and cures disposing technique |
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| CN102583817A (en) * | 2012-02-02 | 2012-07-18 | 南京大学 | Printing and dyeing tail water deep treatment and reuse process |
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| CN205740581U (en) * | 2016-06-28 | 2016-11-30 | 中钢集团天澄环保科技股份有限公司 | A kind of processing means of chlor-alkali industry mercury-containing waste water |
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2016
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101148297A (en) * | 2007-08-29 | 2008-03-26 | 浙江大学 | Method for processing surface treatment integrated waste water |
| US20120018384A1 (en) * | 2010-02-01 | 2012-01-26 | John Sawyer | Mercury removal from water |
| CN102583817A (en) * | 2012-02-02 | 2012-07-18 | 南京大学 | Printing and dyeing tail water deep treatment and reuse process |
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| CN108687114A (en) * | 2018-05-16 | 2018-10-23 | 扬州杰嘉工业固废处置有限公司 | A kind of Organomercurial waste is stable and cures disposing technique |
| CN108687114B (en) * | 2018-05-16 | 2021-05-11 | 扬州杰嘉工业固废处置有限公司 | Mercury-containing reagent waste stabilization and solidification treatment process |
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Application publication date: 20160921 |