CN109534558A - Sodium dichromate method produces expansible graphite acid waste water processing equipment and technique - Google Patents
Sodium dichromate method produces expansible graphite acid waste water processing equipment and technique Download PDFInfo
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- CN109534558A CN109534558A CN201811607668.7A CN201811607668A CN109534558A CN 109534558 A CN109534558 A CN 109534558A CN 201811607668 A CN201811607668 A CN 201811607668A CN 109534558 A CN109534558 A CN 109534558A
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- waste water
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- expansible graphite
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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
-
- 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
- C02F1/52—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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- 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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/04—Oxidation reduction potential [ORP]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
Abstract
The invention discloses a kind of sodium dichromate methods to produce expansible graphite acid waste water processing equipment, comprising: for recycling the recycling graphite unit of expansible graphite particle；Adjusting unit for balanced water quality and quantity；For being the reduction reaction unit of trivalent chromium by the hexavalent chrome reduction in waste water；Neutralization reaction unit；The press filtration unit of dehydration and drying is carried out for the sludge to generation；Filtrate storage unit；For removing the filter element of the heavy metal particles object formed in waste water, suspended matter；Wherein, above-mentioned each unit is sequentially connected to.The invention also discloses a kind of sodium dichromate methods to produce expansible graphite process for treating acidic sewage.Wastewater treatment stably reaching standard of the present invention, processing load is high, processing cost is low.
Description
Technical field
The present invention relates to field of waste water treatment, produce expansible graphite acid waste water more particularly, to a kind of sodium dichromate method
Treatment process and equipment.
Background technique
The sodium dichromate method production existing wastewater processing technology of expansible graphite acid waste water mainly has chemical precipitation method, electricity wadding
Solidifying oxidation-precipitation method.Chemical precipitation method processing expansible graphite acid waste water is carried out at neutralization with adding alkali to the diluted acid in waste water
Reason is adjusted wastewater pH to a certain range using alkali, is reacted using alkali with heavy metal ion, utilize sedimentation basin separating beavy metal
Hydroxide precipitating, but the chromium in waste water exists in the form of Cr VI and two kinds of trivalent chromium, trivalent chromium corresponding hydrogen easy to form
Oxide precipitation and toxicity is smaller, Cr VI relative difficult forms corresponding hydroxide precipitating and toxicity is very big thus simple
It goes to neutralize waste water with alkali, precipitate the heavy metal ion in waste water, there are the low deficiencies for the treatment of effeciency, it is difficult to meet emission request；
Though electric flocculation oxidation-precipitation method processing expansible graphite acid waste water need to only add part lye and adjust waste water to certain pH, do not have to
It adds the medicaments such as reducing agent, flocculant to handle waste water, but that there are pole plates is perishable, electricity consumption is big, and processing load is low, place
It manages the defects of at high cost, limits its use to a certain degree.As described above, acid for sodium dichromate method production expansible graphite
The processing of waste water, there is presently no being capable of stably reaching standard, the mature treatment process that processing load is high, processing cost is low.
Summary of the invention
The purpose of the present invention is to solve the above-mentioned problems, and it is acid to provide a kind of sodium dichromate method production expansible graphite
Sewage treatment equipment, wastewater treatment stably reaching standard, processing load is high, processing cost is low.
To achieve the goals above, the present invention adopts the following technical scheme: a kind of sodium dichromate method produces expansible graphite
Acid waste water processing equipment characterized by comprising for recycling the recycling graphite unit of expansible graphite particle；
Adjusting unit for balanced water quality and quantity；
For being the reduction reaction unit of trivalent chromium by the hexavalent chrome reduction in waste water；
Neutralization reaction unit；
The press filtration unit of dehydration and drying is carried out for the sludge to generation；
Filtrate storage unit；
For removing the filter element of the heavy metal particles object formed in waste water, suspended matter；
Wherein, above-mentioned each unit is sequentially connected to.
Optionally, the filter element is connected to clear water storage unit.
Optionally, the first pump of setting, the neutralization reaction unit and pressure between the adjusting unit and reduction reaction unit
The second pump of setting between unit is filtered, third is set between the filtrate storage unit and filter element and is pumped.
Optionally, front end dosing mouth and rear end dosing mouth is respectively set on the water inlet pipe and outlet pipe of the third pump, it is preceding
End dosing mouth is for adding flocculant PAC, and rear end dosing mouth is for adding flocculation aid PAM.
Optionally, ORP is set at the reduction reaction unit, instrument and reduction reaction unit automatic medicament feeding machine is monitored online.
Optionally, pH is set at the neutralization reaction unit, instrument and neutralization reaction unit automatic medicament feeding machine is monitored online.
On the other hand, a kind of sodium dichromate method produces expansible graphite process for treating acidic sewage, it is characterised in that: waste water
Remaining fine particle expansible graphite in recycling graphite unit recycling waste water is initially entered, is then promoted to reduction with the first pump
Reaction member；Ferrous sulfate is added and adjusts waste water ORP current potential, controls ORP current potential between 482-485mV, when ORP is monitored online
When instrument monitors waste water current potential lower than 482mV, control unit issues the instruction for adding ferrous sulfate solution, when ORP is monitored online
When instrument monitors that waste water current potential is higher than 485mV, control system issues the instruction for stopping adding ferrous sulfate solution, at this time in waste water
Cr VI be all reduced to trivalent chromium；Waste water enters neutralization reaction unit, and pH on-line monitoring instrument is set in neutralization reaction unit, when
When pH on-line monitoring instrument monitors wastewater pH lower than 7.5, control system issues the instruction of feeding lime cream, when instrument is monitored online in pH
Monitor wastewater pH be higher than 8 when, control system issue stop feeding lime cream instruction, adjusting pH keep it in 7.5-8 it
Between, the heavy metal ion such as trivalent chromium in waste water form fine suspension；Waste water with the second pump pumping to press filtration unit, in filtrate
Containing impurity such as suspended matter, heavy metal hydroxides, filtrate is with third pumping into filter element；It is saturating that filter element goes out water colorless
Bright, suspension content meets national emission standard lower than 10mg/l, content of beary metal, into clear water reserviors.
Optionally, flocculation aid PAM is added at the water inlet pipe of the filter element, the precipitating particle aggregation for that will generate increases
Greatly.
Optionally, the sludge timing automatic-discharging in the filter element, the sludge of discharge enter neutralization reaction unit, warp
Second is pumped into filter press dehydration, mud cake entrucking outward transport.
Compared with prior art, the invention has the following beneficial effects: respective reaction ponds in (1) technique to be equipped with on-line monitoring
The number of dosage can be automatically adjusted, the dosage of medicament is reduced under the premise of ensureing treatment effect, operating cost is more for instrument
Low, treatment effect is more stable.(2) technology controlling and process, automation degree of equipment are high, easy to operate, save artificial.Only when medicament deficiency
When by being manually properly added, operation is simple.(3) in technique filter especially suitable for produce expansible graphite acid waste water
Filtering, separating treatment after reaction, the filter media surface in filter have electrostatic, can effectively adsorb, in filtered wastewater
Fine particulates carry out effective retention removal to heavy metal hydroxide.(4) technological design is scientific and reasonable, adapts to certain
The load fluctuation and variation of degree, stable water outlet is up to standard, high degree of automation, and reaction is abundant and saves medicament, saves artificial, tool
There is the advantage that other sodium dichromate method production expansible graphite process for treating acidic sewage are incomparable at present.
Detailed description of the invention
Fig. 1 is that sodium dichromate method produces expansible graphite acid waste water processing equipment structure chart.
Fig. 2 is that sodium dichromate method produces expansible graphite process for treating acidic sewage module map.
In figure, 101 recycling graphite units, 102 adjust unit, and 103 first pump, 104 reduction reaction units, in 105 and anti-
Unit is answered, 106 second pump, 107 press filtration units, 108 filtrate storage units, and 109 thirds pump, 110 filter elements, 111 clear water are deposited
Storage unit.
Specific embodiment
Embodiment 1: referring to Fig. 1, a kind of sodium dichromate method production expansible graphite acid waste water processing equipment, including be used for
Recycle the recycling graphite unit (being recycling graphite pond in embodiment) of expansible graphite particle, for the adjusting of balanced water quality and quantity
Unit (being conditioning tank in embodiment), for by reduction reaction unit (embodiment that the hexavalent chrome reduction in waste water is trivalent chromium
In be reduction reaction pond), it is neutralization reaction unit (being neutralization reaction pond in embodiment), dry for carrying out dehydration to the sludge of generation
The press filtration unit (being filter press in embodiment) of change, filtrate storage unit (being reservoir in embodiment), for removing in waste water
The filter element of the heavy metal particles object suspended matter of formation (is filter in embodiment, equipment is the self-produced equipment of our company, specifically
Can refer to ZL201220511324.8), above-mentioned each unit sequentially connects (connection).
The filter element is connected to clear water storage unit (being clear water reserviors in embodiment).The adjusting unit and reduction reaction
The first pump of setting between unit, is arranged the second pump, the filtrate storage unit between the neutralization reaction unit and press filtration unit
Third is arranged between filter element to pump.
Front end dosing mouth and rear end dosing mouth, front end dosing mouth is respectively set on the water inlet pipe and outlet pipe of the third pump
For adding flocculant PAC (polymeric aluminum chlorides solution), (polyacrylamide is molten for adding flocculation aid PAM for rear end dosing mouth
Liquid).
Be arranged at the reduction reaction unit ORP be monitored online instrument and reduction reaction unit automatic medicament feeding machine (Automatic Dosing,
Can refer to the prior art), ORP on-line monitoring instrument and reduction reaction unit automatic medicament feeding machine are connected to control unit.
Be arranged at the neutralization reaction unit pH be monitored online instrument and neutralization reaction unit automatic medicament feeding machine (Automatic Dosing,
Can refer to the prior art), pH on-line monitoring instrument and neutralization reaction unit automatic medicament feeding machine are connected to control unit.
The effect in recycling graphite pond is remaining subtle expansible graphite particle in recycling waste water, increases yield, simultaneously
Reduce the processing load of back segment treatment process.
The effect of conditioning tank is storage waste water, and balanced water quality and quantity.
The effect of first pump is lifting waste water into reduction reaction pond, controls flow of inlet water.
The effect of reduction reaction pond is that ferrous sulfate is added sufficiently to carry out reduction reaction with waste water, makes the Cr VI in waste water
It is reduced to trivalent chromium, Chi Zhongshe blender.
The effect of neutralization reaction pond is to adjust pH value, provides optimum reaction condition for neutralization reaction, improves sludge, Chi Zhongshe
Blender.
Second pump effect be promotion neutralization reaction pond in sludge into filter press dehydration.
The effect of filter press is to carry out dehydration and drying to the sludge of generation, is readily transported.
The effect of reservoir is transfer, storage filtrate.
The effect of third pump is the filtrate in reservoir to be promoted to filter, while providing flocculant, flocculation aid and giving up
The condition of water mixing, controls flow of inlet water.
The effect of filter is filtering, the separation for waste water, removes the heavy metal particles object formed in waste water, suspends
Object.
Clear water of the clear water reserviors effect for storage after processed, is convenient for workshop reuse or qualified discharge.
Embodiment 2: the technique in the present embodiment is related to the equipment in embodiment 1, and referring to fig. 2, a kind of sodium dichromate method is raw
Expansible graphite process for treating acidic sewage is produced, the acid waste water that workshop generates initially enters recycling graphite pond (recycling graphite list
Member) remaining fine particle expansible graphite in waste water is recycled, then reduction reaction pond (reduction reaction list is promoted to the first pump
Member)；Ferrous sulfate is added and adjusts waste water ORP current potential, controls ORP current potential between 482-485mV, when ORP on-line monitoring instrument prison
When measuring waste water current potential lower than 482mV, control system sending adds the instruction of ferrous sulfate solution (certainly by reduction reaction unit
Dynamic chemicals feeder is realized), when ORP on-line monitoring instrument monitors that waste water current potential is higher than 485mV, control system, which issues, to be stopped adding sulphur
The instruction of sour ferrous iron solution, the Cr VI in waste water is all reduced to trivalent chromium at this time；Waste water enters neutralization reaction pond and (neutralizes anti-
Answer unit), instrument is monitored online in Chi Zhongshe pH, and when pH on-line monitoring instrument monitors wastewater pH lower than 7.5, control system, which issues, is thrown
The instruction (being realized by neutralization reaction unit chemicals feeder) for adding milk of lime, when pH on-line monitoring instrument monitors that wastewater pH is higher than 8,
Control system issues the instruction for stopping feeding lime cream, adjusts pH and keeps it between 7.5-8, the weight such as trivalent chromium in waste water
Metal ion forms fine suspension, while flocculation aid PAM and flocculant PAC is added at water inlet pipe (water inlet pipe of filter),
Increase the precipitating particle aggregation generated；Waste water with the second pumping to filter press (press filtration unit), in filtrate containing suspended matter, again
The impurity such as metal hydroxides, with third pumping, into filter, (filter element, filter used in the present embodiment are our company
Equipment of the Company can specifically refer to ZL201220511324.8)；Filter water outlet is colorless and transparent, suspension content is lower than 10mg/
L, content of beary metal meet national emission standard, into clear water reserviors (clear water storage unit), can qualified discharge, also can be used as ground
Flushing water is back to workshop；Sludge timing automatic-discharging in filter, the sludge of discharge enter neutralization reaction pond, through the second pump
Be pumped into filter press dehydration, mud cake can entrucking outward transport, due to that, containing the calcium sulfate of high level, can also be sold in mud cake
To neighbouring cement plant.
Yichang Xincheng Graphite Co., Ltd. and the great graphite Co., Ltd of the Longjiang Hei Sheng Bo have this technique at
Function case.
The foregoing is merely the preferred embodiment of the present invention, protection scope of the present invention is not limited in above-mentioned embodiment party
Formula, all technical solutions for belonging to the principle of the invention all belong to the scope of protection of the present invention.For those skilled in the art and
Speech, several improvement carried out without departing from the principles of the present invention, these improvement also should be regarded as protection model of the invention
It encloses.
Claims (9)
1. a kind of sodium dichromate method produces expansible graphite acid waste water processing equipment characterized by comprising
For recycling the recycling graphite unit of expansible graphite particle；
Adjusting unit for balanced water quality and quantity；
For being the reduction reaction unit of trivalent chromium by the hexavalent chrome reduction in waste water；
Neutralization reaction unit；
The press filtration unit of dehydration and drying is carried out for the sludge to generation；
Filtrate storage unit；
For removing the filter element of the heavy metal particles object formed in waste water, suspended matter；
Wherein, above-mentioned each unit is sequentially connected to.
2. equipment according to claim 1, which is characterized in that the filter element is connected to clear water storage unit.
3. equipment according to claim 1, which is characterized in that is arranged between the adjusting unit and reduction reaction unit
The second pump is arranged, between the filtrate storage unit and filter element in one pump between the neutralization reaction unit and press filtration unit
Third is arranged to pump.
4. equipment according to claim 3, which is characterized in that be respectively set on the water inlet pipe and outlet pipe of the third pump
Front end dosing mouth and rear end dosing mouth, front end dosing mouth is for adding flocculant PAC, and rear end dosing mouth is for adding flocculation aid
PAM。
5. equipment according to claim 1, which is characterized in that ORP is arranged at the reduction reaction unit, instrument is monitored online
And reduction reaction unit automatic medicament feeding machine.
6. equipment according to claim 1, which is characterized in that at the neutralization reaction unit be arranged pH be monitored online instrument and
Neutralization reaction unit automatic medicament feeding machine.
7. a kind of sodium dichromate method produces expansible graphite process for treating acidic sewage, it is characterised in that: waste water initially enters stone
Remaining fine particle expansible graphite in black recovery unit recycling waste water, is then promoted to reduction reaction unit with the first pump；
Ferrous sulfate is added and adjusts waste water ORP current potential, controls ORP current potential between 482-485mV, when ORP on-line monitoring instrument monitors
When waste water current potential is lower than 482mV, control unit issues the instruction for adding ferrous sulfate solution, when ORP on-line monitoring instrument monitors
When waste water current potential is higher than 485mV, control system issues the instruction for stopping adding ferrous sulfate solution, at this time the Cr VI in waste water
All it is reduced to trivalent chromium；Waste water enters neutralization reaction unit, pH on-line monitoring instrument is set in neutralization reaction unit, when pH is supervised online
When control instrument monitors wastewater pH lower than 7.5, control system issues the instruction of feeding lime cream, when pH on-line monitoring instrument monitors to give up
When water pH is higher than 8, control system issues the instruction for stopping feeding lime cream, adjusts pH and keeps it between 7.5-8, in waste water
The heavy metal ion such as trivalent chromium form fine suspension；Waste water the second pumping to press filtration unit, in filtrate containing suspended matter,
The impurity such as heavy metal hydroxide, filtrate is with third pumping into filter element；Filter element water outlet is colorless and transparent, suspended matter contains
Amount is lower than 10mg/l, into clear water reserviors.
8. technique according to claim 7, which is characterized in that flocculation aid PAM is added at the water inlet pipe of the filter element,
Precipitating particle aggregation for that will generate increases.
9. technique according to claim 7, which is characterized in that the sludge timing automatic-discharging in the filter element, row
Sludge out enters neutralization reaction unit, is pumped into filter press dehydration, mud cake entrucking outward transport through second.
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| CN201811607668.7A CN109534558A (en) | 2018-12-27 | 2018-12-27 | Sodium dichromate method produces expansible graphite acid waste water processing equipment and technique |
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| CN201811607668.7A CN109534558A (en) | 2018-12-27 | 2018-12-27 | Sodium dichromate method produces expansible graphite acid waste water processing equipment and technique |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110040870A (en) * | 2019-04-03 | 2019-07-23 | 东莞市三人行环境科技有限公司 | A kind of method of painting wastewater processing |
| CN112551755A (en) * | 2020-12-17 | 2021-03-26 | 黑龙江哈工石墨科技有限公司 | Expandable graphite production wastewater treatment system and treatment method |
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| CN110040870B (en) * | 2019-04-03 | 2021-11-16 | 东莞市三人行环境科技有限公司 | Method for treating paint spraying wastewater |
| CN112551755A (en) * | 2020-12-17 | 2021-03-26 | 黑龙江哈工石墨科技有限公司 | Expandable graphite production wastewater treatment system and treatment method |
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Application publication date: 20190329 |
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