CN209411966U - The processing system of acid heavy metal wastewater - Google Patents
The processing system of acid heavy metal wastewater Download PDFInfo
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- CN209411966U CN209411966U CN201821967100.1U CN201821967100U CN209411966U CN 209411966 U CN209411966 U CN 209411966U CN 201821967100 U CN201821967100 U CN 201821967100U CN 209411966 U CN209411966 U CN 209411966U
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- 238000012545 processing Methods 0.000 title claims description 77
- 229910001385 heavy metal Inorganic materials 0.000 title claims description 47
- 239000002351 wastewater Substances 0.000 title claims description 42
- 239000002253 acid Substances 0.000 title claims description 35
- 239000012530 fluid Substances 0.000 claims description 53
- 239000007788 liquid Substances 0.000 claims description 53
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical group [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 51
- 230000007246 mechanism Effects 0.000 claims description 40
- 238000001556 precipitation Methods 0.000 claims description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 31
- 239000002002 slurry Substances 0.000 claims description 29
- 238000000034 method Methods 0.000 claims description 28
- 238000007254 oxidation reaction Methods 0.000 claims description 28
- 239000007800 oxidant agent Substances 0.000 claims description 27
- 230000001590 oxidative effect Effects 0.000 claims description 27
- 230000003647 oxidation Effects 0.000 claims description 24
- 238000004073 vulcanization Methods 0.000 claims description 22
- 239000003795 chemical substances by application Substances 0.000 claims description 21
- 229910052753 mercury Inorganic materials 0.000 claims description 21
- 230000001376 precipitating effect Effects 0.000 claims description 21
- 230000008569 process Effects 0.000 claims description 19
- 238000006386 neutralization reaction Methods 0.000 claims description 14
- 239000003002 pH adjusting agent Substances 0.000 claims description 13
- 238000012546 transfer Methods 0.000 claims description 12
- 238000003825 pressing Methods 0.000 claims description 10
- 238000003860 storage Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 7
- 230000002378 acidificating effect Effects 0.000 claims description 6
- 239000003607 modifier Substances 0.000 claims description 6
- 239000012286 potassium permanganate Substances 0.000 claims description 5
- 238000000746 purification Methods 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000003472 neutralizing effect Effects 0.000 claims 1
- 150000002500 ions Chemical class 0.000 description 12
- 239000003153 chemical reaction reagent Substances 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 10
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 8
- BQPIGGFYSBELGY-UHFFFAOYSA-N mercury(2+) Chemical compound [Hg+2] BQPIGGFYSBELGY-UHFFFAOYSA-N 0.000 description 8
- 239000008213 purified water Substances 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
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- 239000000243 solution Substances 0.000 description 6
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- 238000004065 wastewater treatment Methods 0.000 description 5
- 239000007790 solid phase Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000035484 reaction time Effects 0.000 description 3
- 239000006228 supernatant Substances 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical group [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000008267 milk Substances 0.000 description 2
- 210000004080 milk Anatomy 0.000 description 2
- 235000013336 milk Nutrition 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 210000002966 serum Anatomy 0.000 description 2
- 239000005708 Sodium hypochlorite Substances 0.000 description 1
- 206010044565 Tremor Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 159000000013 aluminium salts Chemical class 0.000 description 1
- 229910000329 aluminium sulfate Inorganic materials 0.000 description 1
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- 235000012255 calcium oxide Nutrition 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
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- 238000012432 intermediate storage Methods 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
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- 238000001223 reverse osmosis Methods 0.000 description 1
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- 239000010865 sewage Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
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- Removal Of Specific Substances (AREA)
Abstract
The utility model provides a kind of processing system of acid heavy metal wastewater.The processing system includes oxidation unit, the first neutralization device, vulcanization removal of mercury unit and precipitation unit.Oxidation unit is provided with feed opening and the outlet of the first treatment fluid, and feed opening is for being added acid heavy metal wastewater and oxidant；First neutralization device is provided with alkaline pH adjusting agent entrance, the first treatment fluid entrance and the outlet of second processing liquid, first treatment fluid entrance is exported with the first treatment fluid to be connected by the first treatment fluid transfer pipeline, vulcanization removal of mercury unit is provided with vulcanizing agent entrance, second processing liquid entrance and the outlet of third treatment fluid, and second processing liquid entrance is exported with second processing liquid to be connected by second processing liquid transfer pipeline；Precipitation unit is provided with third treatment fluid entrance and precipitant inlet, and third treatment fluid entrance is exported with third treatment fluid to be connected by third treatment fluid transfer pipeline.Above-mentioned processing system have many advantages, such as the feature of environmental protection it is high, it is at low cost, convenient for large-scale application.
Description
Technical field
The utility model relates to field of sewage treatment, in particular to a kind of processing system of acid heavy metal wastewater.
Background technique
With the propulsion of industrialization and urbanization, the annual production such as plating, printing and dyeing, mining, metallurgy and chemical industry largely contains
The waste water of heavy metal ion and mercury metal, the pollution so as to cause heavy metal and mercury metal are got worse.Heavy metal is difficult to degrade simultaneously
It can constitute and biology and human health are seriously threatened by food chain biological concentration.And mercury metal is volatile, human body sucking
After the symptoms such as be also easy to produce insanity, gingivitis, tremble.
In recent years, heavy metal wastewater thereby Treatment process is quickly grown, new technology, new method are continuously emerged, but in practice
It was found that the methods of traditional neutralization precipitation, vulcanization, ion exchange, reverse osmosis, ferrite and absorption are in processing heavy metal wastewater thereby
Middle Shortcomings, such as treatment process are longer, treatment conditions are harsh, higher cost, waste residue is more, introduce secondary pollution, processing
The problems such as limited is measured, needs to continuously improve and develop new processing technique；Simultaneously when in solution there are when atomic state mercury, with top
Method can not remove it.
Utility model content
The main purpose of the utility model is to provide a kind of processing systems of acid heavy metal wastewater, existing to solve
Not the problem of mercury metal not can be removed to the method for heavy metal-containing wastewater treatment.
To achieve the goals above, one aspect according to the present utility model provides a kind of acid heavy metal wastewater
Processing system, processing system include: oxidation unit, the first neutralization device, vulcanization removal of mercury unit and precipitation unit.Oxidation unit is set
It is equipped with feed opening and the outlet of the first treatment fluid, feed opening is for being added acid heavy metal wastewater and oxidant；First neutralizes device
It is provided with alkaline pH adjusting agent entrance, the first treatment fluid entrance and second processing liquid to export, at the first treatment fluid entrance and first
The outlet of reason liquid is connected by the first treatment fluid transfer pipeline, and vulcanization removal of mercury unit is provided with vulcanizing agent entrance, second processing liquid
Entrance and the outlet of third treatment fluid, second processing liquid entrance is exported with second processing liquid to be connected by second processing liquid transfer pipeline
It is logical；Precipitation unit is provided with third treatment fluid entrance, precipitant inlet and treated water outlet, at third treatment fluid entrance and third
The outlet of reason liquid is connected by third treatment fluid transfer pipeline, and precipitation unit is used to precipitate the liquid of third treatment fluid entrance entrance
In heavy metal ion.
Further, above-mentioned vulcanization removal of mercury unit includes: vulcanization mercury removal device and filter-pressing device.Vulcanize mercury removal device setting
There are vulcanizing agent entrance, second processing liquid entrance and the first slurry outlet；Filter-pressing device is provided at the first slurry inlet and third
Liquid outlet is managed, the first slurry inlet is connected with the first slurry outlet by the first fluid-conveying pipe road.
Further, above-mentioned precipitation unit includes: settler and dense device.Settler is provided with precipitating reagent and enters
Mouth, third treatment fluid entrance and the second slurry outlet；Dense device is provided with the second slurry inlet and the outlet of fourth process liquid, the
Two slurry inlets are connected with the second slurry outlet by the second fluid-conveying pipe road.
Further, above-mentioned precipitation unit further includes the second neutralization device, and the second neutralization device is provided with acid pH adjusting
Agent entrance and fourth process liquid entrance, fourth process liquid entrance are connected with the outlet of fourth process liquid.
Further, above-mentioned oxidation unit includes: oxidant feeding mechanism, acid heavy metal wastewater feeding mechanism and oxidation
Device.Oxidant feeding mechanism is provided with oxidant supply opening；Acid heavy metal wastewater feeding mechanism is provided with waste water supply opening；
Oxidation unit is provided with feed opening and the outlet of the first treatment fluid, and feed opening is connected with oxidant supply opening and waste water supply opening respectively
It is logical.
Further, above-mentioned processing system further include: recycle-water storage device, recycle-water storage device are provided with purified water
Entrance, purification water inlet are connected with treated water outlet by purifying water input.
Further, above-mentioned processing system further includes pH on-Line Monitor Device, and pH on-Line Monitor Device is for monitoring first
Neutralize the pH value of liquid in device.
Further, oxidant feeding mechanism is potassium permanganate feeding mechanism.
Using the technical solution of the utility model, the process that acid heavy metal wastewater is handled using above-mentioned processing system
In, with oxidant oxidation reaction occurs for acid heavy metal wastewater in oxidation unit, converts mercury ion for mercury metal, obtains
First treatment fluid.First treatment fluid is delivered in the first neutralization device, adjusts the first treatment fluid using alkaline pH adjusting agent
PH obtains second processing liquid.Then second processing liquid is delivered in vulcanization removal of mercury unit, second processing liquid is made using vulcanizing agent
In mercury ion be converted into mercuric sulphide precipitating, thus realize removal mercury metal purpose.After the processing of over cure removal of mercury unit,
Finally also obtain third treatment fluid.Third treatment fluid is delivered to precipitation unit, in precipitation unit, by precipitation reaction by
Heavy metal ion etc. in three processing also is removed in the form of precipitating, to realize the further clean-up effect to waste water.It adopts
When being handled with above-mentioned processing system the waste water containing mercury metal and heavy metal ion, mercury metal on the one hand can be removed,
The environmentally friendly degree of the purified water of outlet is improved, on the other hand compared to existing wastewater treatment equipment, the process flow of setting
It is short, it can reduce cost for wastewater treatment, and be easy to implement industrialization promotion, economic value with higher.In conclusion above-mentioned
Processing system has many advantages, such as that the feature of environmental protection is high, at low cost and convenient for large-scale application.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide a further understanding of the present invention, this is practical
Novel illustrative embodiments and their description are not constituteed improper limits to the present invention for explaining the utility model.
In the accompanying drawings:
Fig. 1 shows the structural representation for the processing system that a kind of typical embodiment according to the present utility model provides
Figure；
Fig. 2 shows a kind of structural representations for the processing system that preferred embodiment provides according to the present utility model
Figure.
Wherein, the above drawings include the following reference numerals:
A, oxidant；B, acid heavy metal wastewater；C, alkaline pH adjusting agent；D, vulcanizing agent；E, precipitating reagent；G, acid pH tune
Save agent；
10, oxidation unit；11, oxidant feeding mechanism；12, acid heavy metal wastewater feeding mechanism；13, oxidation unit；
20, first device is neutralized；21, alkaline pH adjusting agent feeding mechanism；30, vulcanize removal of mercury unit；31, vulcanize mercury removal device；32, it presses
Filter device；33, vulcanizing agent feeding mechanism；40, precipitation unit；41, settler；42, dense device；43, second device is neutralized；
44, precipitating reagent feeding mechanism；45, acidic ph modifier feeding mechanism；50, recycle-water storage device.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The utility model is described in detail below in conjunction with embodiment.
As described in background technique, the existing method to acid heavy metal wastewater processing, which exists, not can be removed metal
The problem of mercury.In order to solve the above-mentioned technical problem, this application provides a kind of processing systems of acid heavy metal wastewater, such as Fig. 1
Shown, which includes that oxidation unit 10, first neutralizes device 20, vulcanization removal of mercury unit 30 and precipitation unit 40.Oxidation
Unit 10 is provided with feed opening and the outlet of the first treatment fluid, and feed opening is for being added acid heavy metal wastewater and oxidant；First
Neutralization device 20 is provided with alkaline pH adjusting agent entrance, the first treatment fluid entrance and the outlet of second processing liquid, the first treatment fluid and enters
Mouth is exported with the first treatment fluid to be connected by the first treatment fluid transfer pipeline, and vulcanization removal of mercury unit 30 is provided with vulcanizing agent and enters
Mouth, second processing liquid entrance and the outlet of third treatment fluid, second processing liquid entrance and the outlet of second processing liquid pass through second processing
Liquid transfer pipeline is connected；Precipitation unit 40 is provided with third treatment fluid entrance, precipitant inlet and treated water outlet, at third
Reason liquid entrance is exported with third treatment fluid to be connected by third treatment fluid transfer pipeline, and precipitation unit 40 is for precipitating at third
Manage the heavy metal ion in the liquid that liquid entrance enters.
During being handled using above-mentioned processing system acid heavy metal wastewater, acid heavy metal wastewater is in oxidation unit
Oxidation reaction occurs with oxidant in 10, converts mercury ion for mercury metal, obtains the first treatment fluid.First treatment fluid is defeated
It send to first and neutralizes in device 20, the pH of the first treatment fluid is adjusted using alkaline pH adjusting agent, obtains second processing liquid.Then
Like that second processing liquid is delivered in vulcanization removal of mercury unit 30, is converted into the mercury ion in second processing liquid using vulcanizing agent
Mercuric sulphide precipitating, to realize the purpose of removal mercury metal.After the processing of over cure removal of mercury unit 30, third is finally also obtained
Treatment fluid.Third treatment fluid is delivered to precipitation unit 40, it, will be in third processing also by precipitation reaction in precipitation unit 40
Heavy metal ion etc. removed in the form of precipitating, to realize the further clean-up effect to waste water.
When being handled using above-mentioned processing system the waste water containing mercury metal and heavy metal ion, on the one hand it can go
Except mercury metal, the environmentally friendly degree of the purified water of outlet is improved, on the other hand compared to existing wastewater treatment equipment, is arranged
Process flow is short, can reduce cost for wastewater treatment, and be easy to implement industrialization promotion, economic value with higher.To sum up
Described, above-mentioned processing system has many advantages, such as that the feature of environmental protection is high, at low cost and convenient for large-scale application.
Preferably, as shown in Fig. 2, above-mentioned processing system further includes alkaline pH adjusting agent feeding mechanism 21, alkaline pH is adjusted
Agent feeding mechanism 21 is connected with the first neutralization device 20 by alkaline pH adjusting agent transfer pipeline.
In above-mentioned processing system, the main function of vulcanization removal of mercury unit 30 is that mercury ion is made to be converted into mercuric sulphide precipitating, because
And any vulcanization removal of mercury unit 30 with the above function is suitable for the application.In a preferred embodiment, such as Fig. 1
Shown, vulcanization removal of mercury unit 30 includes vulcanization mercury removal device 31 and filter-pressing device 32.Vulcanization mercury removal device 31 is provided with vulcanizing agent
Entrance, second processing liquid entrance and the first slurry outlet；Filter-pressing device 32 is provided with the first slurry inlet and third treatment fluid goes out
Mouthful, the first slurry inlet is connected with the first slurry outlet by the first fluid-conveying pipe road.
It can be after forming mercuric sulphide precipitating using the vulcanization removal of mercury unit 30 with above structure, then pass through filter-pressing device
32, realize the purpose that the mercuric sulphide precipitating of solid phase is separated with the liquid product in reaction system, this can be subsequent progress
Preamble preparation is made in precipitation reaction, and is conducive to that mercuric sulphide is inhibited to precipitate the influence for reacting post precipitation, to be conducive to improve
The rate of deposition of heavy metal ion etc. in precipitation reaction improves the outer feature of environmental protection drained.
Preferably, as shown in Fig. 2, above-mentioned processing system further includes vulcanizing agent feeding mechanism 33, the vulcanizing agent feeding mechanism
33 are connected with vulcanization mercury removal device 31 by vulcanizing agent transfer pipeline.
In above-mentioned processing system, the main function of precipitation unit 40 is to make heavy metal ion to be precipitated in the form precipitated, because
And any precipitation unit with the above function 40 is suitable for the application.In a preferred embodiment, such as Fig. 1 institute
Show, precipitation unit 40 further includes settler 41 and dense device 42.Settler 41 is provided with precipitant inlet, third processing
Liquid entrance and the second slurry outlet；Dense device 42 is provided with the second slurry inlet and the outlet of fourth process liquid, and the second slurry enters
Mouth is connected with the second slurry outlet by the second fluid-conveying pipe road.
After precipitation reaction occurs in precipitation unit 40, the second slurries are obtained, then by dense device 42, by the second slurry
Solid phase and liquid phase in liquid are separated, and liquid phase fourth process liquid is flowed out in a manner of overflow, and solid phase is arranged in the form of filter residue
Out.Be conducive to improve the solid phase particles object in outlet purified water using the precipitation unit 40 with above structure, to be conducive to
Further increase its feature of environmental protection.
In a preferred embodiment, as shown in Figure 1, precipitation unit 40 further includes the second neutralization device 43, second
It neutralizes device 43 and is provided with acidic ph modifier entrance and fourth process liquid entrance, fourth process liquid entrance goes out with fourth process liquid
Mouth is connected.
The pH that can externally drain in setting second with device 43 in precipitation unit 40 is adjusted, to further mention
The high outer feature of environmental protection and utility value drained.
Preferably, as shown in Fig. 2, above-mentioned processing system further includes precipitating reagent feeding mechanism 44, the precipitating reagent feeding mechanism
44 are connected with settler 41 by precipitating reagent transfer pipeline.
Preferably, as shown in Fig. 2, above-mentioned processing system further includes acidic ph modifier feeding mechanism 45, the acid pH tune
Section agent feeding mechanism 45 is connected with the second neutralization device 43 by acidic ph modifier transfer pipeline.
In a preferred embodiment, as shown in Fig. 2, above-mentioned oxidation unit 10 include oxidant feeding mechanism 11,
Acid heavy metal wastewater feeding mechanism 12 and oxidation unit 13.Oxidant feeding mechanism 11 is provided with oxidant supply opening, acid
Heavy metal wastewater thereby feeding mechanism 12 is provided with waste water supply opening, and oxidation unit 13 is provided with feed opening and the outlet of the first treatment fluid,
Feed opening is connected with oxidant supply opening and waste water supply opening respectively.
Oxidation unit 10 with above structure is conducive to improve the degree of automation of entire processing system, to reduce behaviour
The labor intensity of author.
Preferably, above-mentioned oxidant feeding mechanism 11 is potassium permanganate feeding mechanism.Made using potassium permanganate feeding mechanism
Be conducive to improve the efficiency that mercury metal in oxidation reaction is converted into mercury ion for oxidant feeding mechanism 11.
Preferably, as shown in Fig. 2, above-mentioned processing system further includes recycle-water storage device 50, recycle-water storage device 50
It is provided with purification water inlet, purification water inlet is connected with treated water outlet by purifying water input.Recycle-water storage device
The purified water of discharge can be recycled and be stored by 50 setting, in order to be used for other process, to improve entire processing
The feature of environmental protection and economy of technique.
Preferably, above-mentioned processing system further includes pH on-Line Monitor Device, and pH on-Line Monitor Device is for monitoring in first
With the pH value of liquid in device 20.
The application is described in further detail below in conjunction with specific embodiment, these embodiments should not be understood as limitation originally
Apply for range claimed.
Embodiment 1
Acid heavy metal wastewater is handled using processing system shown in Fig. 2, the ingredient of acid heavy metal wastewater and
Concentration value is shown in Table 1.
Table 1
| Element | PH | Zn2+ | Pb2+ | Hg2+ | Cd2+ | Cl- | As3+ | F- |
| Content, mg/L | 1 | 60 | 11 | 80 | 2 | 600 | 45 | 400 |
Processing method is as follows:
Acid heavy metal wastewater (material B) is stored in acid heavy metal wastewater feeding mechanism 12, and is pumped (Q by S1
=5m3/ h) into oxidation unit 13 (oxidation trough).In the purified water and oxidant feeding mechanism 11 that water feeder 14 is provided
5wt% KMnO4Solution (material A) mixes in mixing arrangement 15, obtains oxidant mixed liquor, then with the speed of 500L/h
Degree inputs above-mentioned oxidant mixed liquor in oxidation unit 13 (oxidation trough).By oxidation reaction, make in acid heavy metal wastewater
Atomic state mercury be converted into mercury ion, reaction time 40min obtains the first treatment fluid, and by the first treatment fluid overflow to
One neutralizes device 20.
S2, alkaline pH adjusting agent feeding mechanism 21 supplies alkaline pH adjusting agent (NaOH aqueous solution), and alkaline pH is adjusted
Agent (NaOH aqueous solution, material C) is delivered in the first neutralization device 20, is adjusted to 3 with the pH of the first treatment fluid, is obtained second processing
Then liquid is transported to vulcanization mercury removal device 31 in a manner of overflow (waste acid removes mercury tank).
S3, the vulcanizing agent that vulcanizing agent feeding mechanism 33 provides, and by the vulcanizing agent (Na of 5wt%2S solution, dosage are
400L/h, material D) it is continuously added in vulcanization mercury removal device 31 (waste acid removes mercury tank).Make the mercury in vulcanizing agent and second processing liquid
Ion carries out vulcanization reaction, and reaction time 40min obtains the mixed serum of mercuric sulphide precipitating and third treatment fluid.By overflowing
Above-mentioned conjunction slurries are delivered to intermediate storage tank by the mode of stream, and mixed serum is delivered to 32 (filters pressing of filter-pressing device with elevator pump
Machine) filters pressing is carried out, obtain filtrate (third treatment fluid) and filter residue (mercuric sulphide).Filtrate is collected to filtrate receiver, filter residue (vulcanization
Mercury) it is transported to solid dangerous waste slag library.
S4, the filtrate (third treatment fluid) after the removal of mercury enter settler 41 (removing heavy metals and fluorine reaction by delivery pump
Slot).
S5, precipitating reagent feeding mechanism 44 provide precipitating reagent (lime milk solution of 20wt%, material E), and by precipitating reagent
(lime milk solution of 20wt%) is continuously added in settler 41 (removing heavy metals and fluorine reactive tank).Make above-mentioned third filtrate with
Precipitating reagent carries out precipitation reaction, while the pH of reaction system being controlled to 11.5~12, and reaction time 60min obtains slurries.
Then slurries are delivered in dense device 42 (concentrator) and carry out solid-liquor separation, supernatant overflow to supernatant tank, and by pumping
It is delivered to the second neutralization device 43 (pH adjusts back slot).
S6, acidic ph modifier feeding mechanism 45 are continuously added to 98wt% to above-mentioned second neutralization device 43 (pH adjusts back slot)
The concentrated sulfuric acid (material E), after so that the pH of above-mentioned supernatant is pulled back to 7.5 overflow to recycle-water storage device 50 (reuse pool) return
With or outlet." lead, Zn Cr coating pollutant emission standard " (GB25466-2010) row is fully achieved in waste acid after the process
Put standard.
Embodiment 2
With the difference of embodiment 1 are as follows: the pH of the first treatment fluid is adjusted to 5 using alkaline pH adjusting agent, obtains second processing
Liquid.
Embodiment 3
With the difference of embodiment 1 are as follows: oxidant uses the sodium hypochlorite of 60wt%.
Comparative example 1
With the difference of embodiment 1 are as follows: using activated carbon adsorption and coagulant sedimentation, (precipitating reagent is quick lime, molysite, aluminium
Salt) handle the acid heavy metal wastewater.After processing, the mercury of 90~95wt%% can be removed, while removing other heavy metals
Ion, but it is not able to satisfy the discharge standard to mercury.
Ion concentration contained in draining outside after processing in embodiment 1 to 3 and comparative example 1 is shown in Table 1.
Table 1
It can be seen from the above description that the above embodiments of the utility model achieve the following technical effects:
Comparing embodiment 1 to 3 and comparative example 1 are it is found that can effectively remove metal using processing method provided by the present application
Mercury, while treated that purified water can directly carry out outlet.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (8)
1. a kind of processing system of acid heavy metal wastewater, which is characterized in that the processing system includes:
Oxidation unit (10), the oxidation unit (10) are provided with feed opening and the outlet of the first treatment fluid, and the feed opening is used for
The acid heavy metal wastewater and oxidant is added；
First neutralizes device (20), and device (20) are provided with alkaline pH adjusting agent entrance, the first treatment fluid enters for first neutralization
Mouth and the outlet of second processing liquid, the first treatment fluid entrance and first treatment fluid outlet pass through the first treatment fluid delivery pipe
Road is connected,
Vulcanize removal of mercury unit (30), the vulcanization removal of mercury unit (30) is provided with vulcanizing agent entrance, second processing liquid entrance and the
The outlet of three treatment fluids, the second processing liquid entrance is exported with second processing liquid to be connected by second processing liquid transfer pipeline；
Precipitation unit (40), the precipitation unit (40) are provided with third treatment fluid entrance, precipitant inlet and treated water outlet,
The third treatment fluid entrance is exported with the third treatment fluid to be connected by third treatment fluid transfer pipeline, and the precipitating is single
First (40) are used to precipitate the heavy metal ion in the liquid that the third treatment fluid entrance enters.
2. processing system according to claim 1, which is characterized in that vulcanizing removal of mercury unit (30) includes:
Vulcanize mercury removal device (31), the vulcanization mercury removal device (31) is provided with the vulcanizing agent entrance, the second processing liquid
Entrance and the first slurry outlet；
Filter-pressing device (32), the filter-pressing device (32) is provided with the first slurry inlet and third treatment fluid outlet, described
First slurry inlet is connected with first slurry outlet by the first fluid-conveying pipe road.
3. processing system according to claim 1, which is characterized in that the precipitation unit (40) includes:
Settler (41), the settler (41) are provided with the precipitant inlet, the third treatment fluid entrance and
Two slurry outlets；
Dense device (42), the dense device (42) is provided with the second slurry inlet and fourth process liquid exports, and described second
Slurry inlet is connected with second slurry outlet by the second fluid-conveying pipe road.
4. processing system according to claim 3, which is characterized in that the precipitation unit (40) further includes the second neutralization dress
It sets (43), described second, which neutralizes device (43), is provided with acidic ph modifier entrance and fourth process liquid entrance, and described the everywhere
Reason liquid entrance is connected with fourth process liquid outlet.
5. processing system according to any one of claim 1 to 4, which is characterized in that the oxidation unit (10) includes:
Oxidant feeding mechanism (11), the oxidant feeding mechanism (11) are provided with oxidant supply opening；
Acid heavy metal wastewater feeding mechanism (12), the acid heavy metal wastewater feeding mechanism (12) are provided with waste water supply
Mouthful；
Oxidation unit (13), the oxidation unit (13) is provided with the feed opening and first treatment fluid outlet, described to add
Material mouth is connected with the oxidant supply opening and the waste water supply opening respectively.
6. processing system according to claim 5, which is characterized in that the processing system further include:
Recycle-water storage device (50), the recycle-water storage device (50) are provided with purification water inlet, the purification water inlet
It is connected with the treated water outlet by purifying water input.
7. processing system according to claim 6, which is characterized in that the processing system further includes pH on-line monitoring dress
It sets, the pH on-Line Monitor Device is used to monitor the described first pH value for neutralizing liquid in device (20).
8. processing system according to claim 5, which is characterized in that the oxidant feeding mechanism (11) is potassium permanganate
Feeding mechanism.
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