CN109336284A - A kind of waste electroplating liquor containing chromium advanced treating and recoverying and utilizing method - Google Patents
A kind of waste electroplating liquor containing chromium advanced treating and recoverying and utilizing method Download PDFInfo
- Publication number
- CN109336284A CN109336284A CN201811229436.2A CN201811229436A CN109336284A CN 109336284 A CN109336284 A CN 109336284A CN 201811229436 A CN201811229436 A CN 201811229436A CN 109336284 A CN109336284 A CN 109336284A
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- Prior art keywords
- chromium
- ion exchange
- ion
- waste water
- exchange column
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
-
- 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
-
- 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
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/007—Modular design
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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)
- Treatment Of Water By Ion Exchange (AREA)
Abstract
The invention discloses a kind of waste electroplating liquor containing chromium advanced treating and recoverying and utilizing methods, comprising the following steps: 1, pre-processed by accurate filter；2, the waste water after pretreatment is passed through in chromium ion absorption system and carries out adsorption treatment, the hexavalent chromium in waste water is adsorbed first, then trivalent chromic ion is adsorbed；3, it is used with such three with the desorption and regeneration that a standby alternately concatenated method of operation recycles four the second ion exchange columns, so that the processing to waste water continuously carries out；4, qualified through detection after the processing of chromium ion exchange system to waste water, it is discharged；5, it after the first ion exchange column reaches saturation, uses mass fraction to carry out desorption and regeneration to chromium ion exchange system for 4~6% sodium hydroxide and sodium chloride solution, obtains chromium acid sodium solution and recycled；Compared with prior art, the present invention processing cost is low, and purification efficiency is high, will not generate secondary pollution.
Description
Technical field
The present invention relates to sewage treatment fields, and in particular to a kind of waste electroplating liquor containing chromium advanced treating and recycling side
Method.
Background technique
As global industry process is fast-developing, heavy metal water pollution causes serious prestige to the health and environment of the mankind
The side of body.Wherein, the waste water containing heavy metal chromium is since height carcinogenicity and strong oxidizing property be the metal pollutant primarily administered.Cause
This, chromate waste water must be handled strictly before discharge.Chromium is mainly derived from the industries such as plating, process hides and dyestuff, wherein electricity
It plates chromate waste water discharge amount and is located at first place.Chromium ion is mainly that there are molten in the form of Cr VI and a small amount of trivalent chromium for major part
In liquid, currently, the processing to chromate waste water mainly has: chemical precipitation method, ion-exchange, electrochemical treatment, active carbon are inhaled
Attached method, film filtering, biosorption process, bio-flocculation process etc..
Currently, being a kind of most commonly used processing method using chemical precipitation method, chromate waste water is introduced into sedimentation basin, so
A large amount of chemical agent is put into backward sedimentation basin, the chromium ion in waste water is cemented out to form precipitating；But it uses such
Mode carries out processing to chromate waste water and has the disadvantage in that 1, because needs add a large amount of medicaments, not only makes operating cost high, simultaneously
It also will cause secondary pollution, generate a large amount of sludge；2, the sedimentation basin for collecting chromate waste water is taken up a large area, and in waste water
Chromium ion recovery rate is low, containing a large amount of chromium ion of residual in the waste water after handling.
Summary of the invention
For the deficiency in the presence of the prior art, the purpose of the present invention is to provide a kind of waste electroplating liquor containing chromium depths
Reason and recoverying and utilizing method, it is at high cost to solve in the prior art, it is be easy to cause secondary pollution, and take up a large area, to waste water
Poor processing effect the problem of.
To achieve the above object, present invention employs the following technical solutions: a kind of waste electroplating liquor containing chromium advanced treating and
Recoverying and utilizing method, comprising the following steps:
(1), it pre-processes: waste water is pumped into accurate filter, remove the suspended matter and granular solids impurity in waste water；
(2), chromium ion adsorbs: the waste water after pretreatment being passed through in chromium ion absorption system and is carried out at absorption
Reason, chromium ion absorption system adsorbs the hexavalent chromium in waste water first, then adsorbs to trivalent chromic ion；It adopts
Chromium ion exchange system includes the first ion exchange column adsorbed positioned at end to trivalent chromic ion and is connected on the
The adsorbing mechanism that multiple second ion exchange columns adsorbed before one ion exchange column to hexavalent chromium are constituted；
(3), the circulation desorption and regeneration of adsorbing mechanism: the second ion exchange column just held positioned at adsorbing mechanism absorbs waste water
In hexavalent chromium reach saturation after, by the connected state to the valve being connected between each second ion exchange column into
Row control makes to be in an off state positioned at the second ion exchange column just held, carries out zeolite regeneration to it, pass through remaining second
Ion exchange column successively absorbs the hexavalent chromium in waste water；Carry out the second ion exchange after desorption and regeneration completion
Column connection carries out using the desorption and regeneration for so recycling adsorbing mechanism in the end of adsorbing mechanism；
(4), qualified discharge: it is qualified through detection after the processing of chromium ion exchange system to waste water, it is discharged；
(5), chromium ion recycle: after the first ion exchange column reaches saturation, use mass fraction for 4~6% hydrogen-oxygen
Change sodium solution chromium ion exchange system is desorbed, it is regenerated using sodium chloride solution afterwards, obtains chromium acid sodium solution
It is recycled.
Compared with the prior art, the invention has the following beneficial effects:
1, by the chromium ion exchange system substep that is made of the first ion exchange column and the second ion exchange column to containing
Hexavalent chromium and trivalent chromic ion in chromium waste water are adsorbed, and by the heavy metal chromium the ion extraction in waste water, detection is qualified
After discharged, it is high to the chromium ion adsorption efficiency in waste water, improve the clean-up effect of waste water, and chromium ion exchange system with
The method that conventionally employed sedimentation basin is handled is compared and reduces occupied area；
2, in waste water chromium ion adsorb during, to multiple second ion exchange columns constitute adsorbing mechanism into
The orderly absorption regeneration of row uses, and makes to reduce the cost to wastewater treatment while carrying out continuous processing to waste water, and will not
Cause the secondary pollution of waste water；
3, after the first ion exchange column reaches saturation, the sodium hydroxide and sodium chloride pair that are 4~6% by mass fraction
Chromium ion exchange system carries out desorption and regeneration, recycles, reduces to ecological ring after chromium ion is converted into chromium acid sodium solution
The pollution in border also further reduces the cost to wastewater treatment by the recycling to heavy metal.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the first ion exchange column or the second ion exchange column in the present invention；
Fig. 2 is the enlarged drawing in the portion A in Fig. 1.
Specific embodiment
Below by specific embodiment, the present invention is described in further detail:
Appended drawing reference in Figure of description includes: shell 1, shell segments 101, runner pipe 2, regeneration inlet tube group 3, regeneration
Drain pipe group 4, supporting network partition 5, exchanger resin 6, locating slot 7, elastic telescopic positioning column 8.
Embodiment
The experiment recycled to the chromium ion in waste water is carried out in the factory of the one discharge chromate waste water in Chongqing region,
To waste water in the process of processing according to following step:
1, chromate waste water is pumped into accurate filter by pipeline and is filtered, with remove suspended matter in waste water and
Grain solid impurity；
2, using include the chromium that constitutes of four the second ion exchange columns being sequentially connected in series and first ion exchange column from
Sub- exchange system handles the waste water after pretreatment, and waste water passes through four the second ion exchange columns to waste water first
In hexavalent chromium adsorbed, then waste water passes through the first ion exchange column again and inhales to the trivalent chromic ion in waste water
It is attached, weakly acidic exchange fiber, chromium ion absorption system are filled in the first ion exchange column and the second ion exchange column
It is passed through the sodium hydroxide solution in alkalinity in the forward direction chromium ion absorption system for handle to chromate waste water, makes exchange fiber
It is rinsed in deionized water is passed through into chromium ion absorption system after alkalescent, is in neutrality exchange fiber.
3, waste water enters in four the second ion exchange columns adsorbed during, because the hexavalent chromium in waste water is dense
Degree gradually decreases, and causes first to reach saturation to the absorption of hexavalent chromium positioned at first the second ion exchange column just held, lead to
The valve being connected between each second ion exchange column is crossed, the operating status of the second ion exchange column is adjusted, position is made
Yu Chuduan has reached and is in an off state between the second ion exchange column of saturation state and other second ion exchange columns, after
It is continuous to continue to carry out waste water the absorption to hexavalent chromium using other three second ion exchange columns, while in saturation shape
It is 4~6% sodium hydroxide solutions and sodium chloride solution that mass fraction is passed through in second ion exchange column of state, it is desorbed
Regeneration, the second ion exchange column connection after progress desorption and regeneration completion are carried out in the end of remaining the second ion exchange column
It uses, the desorption and regeneration that four the second ion exchange columns are recycled with a standby alternately concatenated method of operation using such three
It uses, so that the processing to waste water continuously carries out, and thoroughly processing is cleared up to the second ion exchange column in a saturated state
The desorption liquid that desorption and regeneration generates is drained into reservoir by the features such as relief liquor stable effluent quality and good water quality after qualification
In；
4, the relief liquor obtained after the processing of chromium ion exchange system to waste water analyzes personnel in 24 hours every half
Hour is sampled analysis, concentration maxima≤0.1mg/L of trivalent chromic ion in obtained analysis result, and total chromium concn is maximum
Value≤0.5mg/L, and the average value of the concentration of trivalent chromic ion is 0.086mg/L, the average value of total chromium concn is 0.413mg/
L is discharged；
5, after the first ion exchange column reaches saturation, stop being passed through waste water into chromium ion exchange system, using matter
Chromium ion exchange system is desorbed in the solution for the sodium hydroxide that amount score is 4~6%, is carried out again using sodium chloride to it afterwards
It is raw, it obtains chromium acid sodium solution and is recycled；
6, using shower water in chromium ion exchange system the first ion exchange column and the second ion exchange column rush
It washes, the flushing liquor after rinsing, which is discharged into collecting tank, to be recycled, and the service efficiency of shower water is improved.
With reference to Fig. 1 and Fig. 2: the first ion exchange column and the second ion exchange column include shell 1, shell 1 in the present invention
Top and bottom are provided with runner pipe 2, and regeneration inlet tube group 3 and regeneration drain pipe group 4 are equipped on shell 1；Shell 1
It is detachably connected, can be fixed by bolted connection by multiple shell segments 101, two neighboring shell segments
The supporting network partition 5 in shell 1 is folded between 101, each supporting network partition 5 is solid by multiple positioning reinforcing members
Fixed, multiple supporting network partitions 5 will be separated into multiple adsorbent chambers in shell 1, and exchanger resin 6 is filled in each adsorbent chamber, the
Exchanger resin 6 in one ion exchange column and the second ion exchange column selects suitable resinous wood according to the ion that its needs adsorbs
Material；Regeneration inlet tube group 3 include feed liquor be responsible for and be connected to feed liquor supervisor and between each shell segments 101 at middle part into
Liquid branch pipe is provided with the first regulating valve on each feed liquor branch pipe, and the liquid outlet of each feed liquor branch pipe is arranged at accordingly
The downside of shell segments 101；Regeneration drain pipe group 4 includes each shell that drain was responsible for and was connected to drain supervisor with is located at middle part
Drain branch pipe between section 101 is provided with the second regulating valve, and the inlet of each drain branch pipe pipe on each drain branch pipe
It is arranged at the upside of corresponding shell segments 101；Circumferentially along supporting network partition 5, each positioning adds multiple positioning reinforcing members
Firmware includes the locating slot 7 opened up on supporting network partition 5 and the mounting groove that opens up in shell segments 101, is provided in mounting groove
Elastic telescopic positioning column 8, supporting network partition 5 installs to be positioned in the rear insertion of elastic telescopic positioning column 8 locating slot 7；Each
Third regulating valve is provided on runner pipe 2；The mounting stability of supporting network partition 5 is improved by positioning reinforcing member, and
When dismantling supporting network partition 5, separate also more convenient；Purpose using supporting network partition 5 is in order to which exchanger resin 6 is in length
The phenomenon that will appear failure after time use, because the variation of solution concentration in treatment process is located at the liquid feeding end of ion exchange column
Exchanger resin 6 be easier fail, and the exchanger resin 6 of outlet end using the time it is longer, can to top fail exchange tree
Rouge 6 is replaced, and the cost of ion exchange column in use is reduced, and is more convenient during replacing；Regenerate feed liquor
The structure setting mode of pipe group 3 and regeneration drain pipe group 4 is the regeneration path in order to shorten regenerated liquid, to reduce because handing over
Change the amount of resin 6 and caused by resistance, improve reproduction speed and effect of the exchanger resin 6 during regenerated to reach
Purpose.
When in use, the first regulating valve and the second regulating valve are located for first ion exchange column and the second ion exchange column
In closed state, third regulating valve is in connected state；When regeneration, the first regulating valve and the second regulating valve are located
In connected state, third regulating valve is in closed state.
" first ", " second " and " third " in the present invention are only used for the difference in name.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this
In the scope of the claims of invention.
Claims (9)
1. a kind of waste electroplating liquor containing chromium advanced treating and recoverying and utilizing method, which comprises the following steps:
(1), it pre-processes: waste water is pumped into accurate filter, remove the suspended matter and granular solids impurity in waste water；
(2), chromium ion adsorbs: the waste water after pretreatment is passed through in chromium ion absorption system and carries out adsorption treatment, it is first
First chromium ion absorption system adsorbs the hexavalent chromium in waste water, then adsorbs to trivalent chromic ion；It uses
Chromium ion exchange system include the first ion exchange column that trivalent chromic ion is adsorbed positioned at end and be connected on first from
The adsorbing mechanism that multiple second ion exchange columns adsorbed before sub- exchange column to hexavalent chromium are constituted；
(3), the circulation desorption and regeneration of adsorbing mechanism: the second ion exchange column just held positioned at adsorbing mechanism absorbs in waste water
After hexavalent chromium reaches saturation, controlled by the connected state to the valve being connected between each second ion exchange column
System makes to be in an off state positioned at the second ion exchange column just held, carries out zeolite regeneration to it, pass through remaining second ion
Exchange column successively absorbs the hexavalent chromium in waste water；Carry out the second ion exchange column company after desorption and regeneration completion
Lead to the end in adsorbing mechanism to carry out using the desorption and regeneration for so recycling adsorbing mechanism；
(4), qualified discharge: it is qualified through detection after the processing of chromium ion exchange system to waste water, it is discharged；
(5), chromium ion recycle: after the first ion exchange column reaches saturation, use mass fraction for 4~6% sodium hydroxide
Chromium ion exchange system is desorbed in solution, is regenerated afterwards using sodium chloride solution to it, obtains chromium acid sodium solution and carries out
Recycling.
2. a kind of waste electroplating liquor containing chromium advanced treating according to claim 1 and recoverying and utilizing method, it is characterised in that: institute
State step 5 complete after, to the second ion exchange column of each of the first ion exchange column and adsorbing mechanism using shower water into
The flushing liquor that row rinses formation, which is discharged into collecting tank, to be recycled.
3. a kind of waste electroplating liquor containing chromium advanced treating according to claim 1 and recoverying and utilizing method, it is characterised in that: the
Filling is ion-exchange fibre in one ion exchange column and the second ion exchange column.
4. a kind of waste electroplating liquor containing chromium advanced treating according to claim 3 and recoverying and utilizing method, it is characterised in that: institute
It is weakly acidic to state ion-exchange fibre, ion-exchange fibre when in use, is first handled ion-exchange fibre by alkaline solution
Deionized water is used to rinse to neutrality at after alkalescent.
5. a kind of waste electroplating liquor containing chromium advanced treating according to claim 1 and recoverying and utilizing method, it is characterised in that: institute
State concentration≤0.1mg/L of trivalent chromic ion in the waste water discharged in step 4, total chromium concn≤0.5mg/L.
6. a kind of waste electroplating liquor containing chromium advanced treating according to any one of claims 1-5 and recoverying and utilizing method,
Be characterized in that: first ion exchange column and the second ion exchange column include shell, and case top and bottom are provided with
Runner pipe is equipped with regeneration inlet tube group and regeneration drain pipe group on shell；Shell is detachably connected by multiple shell segments
It forms, is folded between two neighboring shell segments positioned at the intracorporal supporting network partition of shell, each supporting network partition passes through more
A positioning reinforcing member is fixed, and multiple supporting network partitions will be separated into multiple adsorbent chambers in shell, is filled in each adsorbent chamber
Exchanger resin.
7. a kind of waste electroplating liquor containing chromium advanced treating according to claim 6 and recoverying and utilizing method, it is characterised in that: institute
Stating regeneration inlet tube group includes that feed liquor supervisor and the feed liquor branch between each shell segments at middle part are responsible for and are connected to feed liquor
It manages, is provided with the first regulating valve on each feed liquor branch pipe, and the liquid outlet of each feed liquor branch pipe is arranged at corresponding shell
The downside of section.
8. a kind of waste electroplating liquor containing chromium advanced treating according to claim 6 and recoverying and utilizing method, it is characterised in that: institute
Stating regeneration drain pipe group includes that drain supervisor and the drain branch between each shell segments at middle part are responsible for and are connected in drain
It manages, the second regulating valve is provided on each drain branch pipe, and the inlet of each drain branch pipe pipe is arranged at outside corresponding
The upside of shell section.
9. a kind of waste electroplating liquor containing chromium advanced treating a method according to any one of claims 6-8 and recoverying and utilizing method,
Be characterized in that: the multiple positioning reinforcing member along supporting network partition circumferentially, each positioning reinforcing member include supporting network every
The mounting groove opened up on the locating slot and shell segments opened up on plate, is provided with elastic telescopic positioning column in mounting groove, supporting network every
Plate installs to be positioned in rear elastic telescopic positioning column insertion locating slot.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811229436.2A CN109336284A (en) | 2018-10-22 | 2018-10-22 | A kind of waste electroplating liquor containing chromium advanced treating and recoverying and utilizing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811229436.2A CN109336284A (en) | 2018-10-22 | 2018-10-22 | A kind of waste electroplating liquor containing chromium advanced treating and recoverying and utilizing method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110357288A (en) * | 2019-07-25 | 2019-10-22 | 中国船舶重工集团公司第七一八研究所 | A method of heavy metal-containing waste water is recycled using fiber treatment |
| CN110790441A (en) * | 2019-12-10 | 2020-02-14 | 中国工程物理研究院动力部 | Device and method for recovering copper from copper-containing waste liquid |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110357288A (en) * | 2019-07-25 | 2019-10-22 | 中国船舶重工集团公司第七一八研究所 | A method of heavy metal-containing waste water is recycled using fiber treatment |
| CN110790441A (en) * | 2019-12-10 | 2020-02-14 | 中国工程物理研究院动力部 | Device and method for recovering copper from copper-containing waste liquid |
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Application publication date: 20190215 |