CN107381880A - A kind of mobile process system and method for hexavalent chromium polluted underground water - Google Patents
A kind of mobile process system and method for hexavalent chromium polluted underground water Download PDFInfo
- Publication number
- CN107381880A CN107381880A CN201710832803.7A CN201710832803A CN107381880A CN 107381880 A CN107381880 A CN 107381880A CN 201710832803 A CN201710832803 A CN 201710832803A CN 107381880 A CN107381880 A CN 107381880A
- Authority
- CN
- China
- Prior art keywords
- reactor
- processing
- water
- pump
- concentration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- 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
- C02F11/125—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using screw filters
-
- 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
- C02F1/52—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
-
- 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
- C02F2001/007—Processes including a sedimentation step
-
- 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
- C02F2103/06—Contaminated groundwater or leachate
-
- 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
-
- 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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
Abstract
The present invention discloses a kind of mobile process system of hexavalent chromium polluted underground water, and the processing system includes integrated reactor, pH on-line monitoring instrument, oxidation-reduction potential on-line monitoring instrument, electromagnetic flowmeter, static pressure liquid level meter are provided with the reactor；Wherein above-mentioned detector connects with corresponding dosage pump, and detect and respond accordingly；Air agitator, mud discharging mouth and discharge outlet are additionally provided with the reactor.The equipment that the present invention designs each container of size reasonable in design, is finally made rationally to coordinate between each reaction vessel, can be realized that maximum processing water is 5m3/h, run within 24 hours, reach and quickly and easily handle by the proportionate relationship between each reactive material.The present invention carries out air stirring using the compressed gas of automobile, has carried out reasonable utilization to resource, has saved resource to a certain extent, reduced energy expenditure.
Description
Technical field
The invention belongs to the field of polluted underground water processing, and in particular to a kind of mobile processing of hexavalent chromium polluted underground water
System and processing method.
Background technology
Pump-and-treat system skill is current main, the most widely used hexavalent chromium polluted repair process technology of underground water, its base
This running program mainly includes two parts：The underground water of pollution is extracted out from underground first, secondly on the ground in facility to extracting out
Hexavalent chromium polluted underground water handled, purified water is finally discharged into surface water body, reuse or recharge recharge groundwater.It is this
Method is simple and effective, is applicable very much in generation burst Pollution or pollution hexavalent chromium concentration upper zone, can be to underground water
It is hexavalent chromium polluted to make fast reaction, while secondary pollution will not be caused.
At present, the hexavalent chromium polluted underground water of extraction handle and mainly include both of which：It is first, attached in out well
It is near to build waste water disposal facility, treatment in situ；Second, hexavalent chromium polluted underground water transport will be extracted out to neighbouring sewage disposal factory and office
Reason.But both modes exist obvious restricted：Out well, which nearby builds waste water disposal facility, to be needed to put into a large amount of funds
And manpower, and waste water disposal facility can not recycle after the completion of site remediation, can only remove, and cause largely to waste；In addition,
Pump-and-treat system, which is often tackled, occurs burst Pollution or pollution hexavalent chromium concentration upper zone, it is desirable to be able to underground water sexavalence
Fast reaction is made in pollution of chromium, and the construction for the treatment of facility needs for quite a long time, to directly influence recovery project progress.And incite somebody to action
Extract hexavalent chromium polluted underground water transport out and may then be faced to neighbouring sewage treatment plant and sewage is not present in the short range of place
Treatment plant, long-distance transportation cost are too high；Even if there is sewage treatment plant in short range, it is also desirable to which specialised vehicles carry out a large amount of
Waste water transport, risk that is costly and secondary pollution in transportation being present.
Therefore, developing a kind of processing system for making fast reaction hexavalent chromium polluted to underground water that comes into operation at any time turns into
A kind of technical problem urgently to be resolved hurrily.
The content of the invention
Present invention solves the technical problem that it is to provide a kind of vehicle-mounted removable hexavalent chromium wastewater processing complete set of equipments, Neng Gousui
When come into operation, it is hexavalent chromium polluted to underground water to make fast reaction, avoid place build treatment facility caused by funds
Freight and environmental risk caused by waste, pollutant effluents transport and the artificial waste in wastewater treatment process.
The present invention inventive concept be：Hexavalent chromium polluted to underground water fast reaction can be made, come into operation (machine at any time
Dynamic property)；Its design principle is reliable and stable (stability) to ensure water treatment effect；It can be reused in different places, and most
The reduction operating cost (economy) of limits；Easy to operation, management (practicality) is considered simultaneously；Realize the automatic of technical process
Control, labor intensity is reduced, save labour cost (intelligent)；The reasonability and treatment facility of handling process are also contemplated for simultaneously
Security.
Based on above-mentioned inventive concept, the present invention realizes especially by following technical scheme.
A kind of mobile process system of hexavalent chromium polluted underground water, it is characterised in that the processing system includes integration
Reactor, the reactor is interior to be provided with pH on-line monitoring instrument, oxidation-reduction potential on-line monitoring instrument, electromagnetic flowmeter, static pressure liquid
Position meter；Wherein above-mentioned detector connects with corresponding dosage pump, and detect and respond accordingly；Also set on the reactor
There are air agitator, mud discharging mouth and discharge outlet.
Wherein, the system also includes auxiliary equipment, and the auxiliary equipment includes clear water storage facilities, sewage sludge storage is set
Standby, mud cake storage facilities, complex acid equipment are simultaneously provided with sour measuring pump, reducing agent preparation and storage facilities and are provided with reducing agent
Pump, with alkali equipment and it is provided with alkali pump, PAM storage facilities and PAM pumps, waste water lifting pump and spiral sludge dewatering machine is set.
Wherein, the concentration of the Cr VI of the system processing is 200-800mg/L；The concentration of Cr VI exists after preferred process
Below 0.05mg/L, the pH=6.5-8.5 of water after processing.
Wherein, the reactor and auxiliary equipment are installed on car；Compressed gas is utilized it is preferred that being provided with reactor
Air agitator.
Wherein, methods described includes preparation process, waste water treatment step and the sludge dewatering step of processing medicament, described
Each processing step of waste water treatment step is carried out in a reactor
Wherein, the waste water treatment step comprises the following steps：Acidification step, reduction step, neutralization procedure, flocculation step
Suddenly separating step, filtering adsorption step, pH readjustments step, sludge dewatering step, are precipitated.
Wherein, it is acidified in the acidification step using sulfuric acid, the pH=2-4 after acidifying, the mass body of sulfuric acid used
Product specific concentration is 2%；It is preferred that the reducing agent that the reduction step uses is sodium hydrogensulfite, its dosage is content of 6-valence Cr ions
3~5 times, the mass volume ratio concentration of sodium hydrogensulfite is 25%；It is preferred that the neutralization procedure uses caustic soda to be neutralized,
PH=8-8.5 after neutralization, the mass volume ratio concentration of caustic soda is 10%；It is preferred that the flocculation step is to add to gather in flocculation zone
Aluminium chloride (PAC) is closed, is precipitated helping coagulation zone to add polyacrylamide (PAM solution), dewaterer is delivered to by sludge pump
Carry out filtering means dehydration, dehydrated sludge cake pack recovery；It is preferred that the dewaterer is spiral sludge dewatering machine.
Wherein, the concentration of the Cr VI is 200-800mg/L；The concentration of Cr VI after preferred process is in 0.05mg/L
Hereinafter, pH=6.5-8.5.
Wherein, air stirring is carried out in the acidification step, neutralization procedure and flocculation reaction step, preferably described air stirs
Mix is stirred using the compressed gas of automobile.
Wherein, in the acidification step, the pH value that accessing pending water is controlled by adding sulfuric acid is 2-4；Controlled in reduction step
Current potential processed is E=250-300mV；The pH value that accessing pending water is controlled in neutralization procedure is 8-8.5.
A kind of processing equipment of described hexavalent chromium polluted waste water, its reactor is standard container specifications model
45HQ.Actual casing inside dimension：Length × width × height=13.556 × 2.352 × 2.698m, outside dimension：13.716×2.438×
2.896m.Complete set of equipments is placed in container.Because mobile unit is limited by appearance and size, pushed away according to main equipment capacity
Calculate, it is 5m to design maximum processing water3/ h, take 24 hours and run.
Beneficial effects of the present invention are as follows：
Present device system can come into operation at any time, hexavalent chromium polluted to underground water to make fast reaction；Operation is steady
It is fixed, easy-to-operate, operating cost economy, the secondary pollution to environment is not caused.
Present device system thoroughly realizes the automatic management of science intelligence, reduces labor intensity as far as possible, saves artificial
Cost；The device systems of the present invention can be reused in different places, funds wave caused by avoiding on-site construction treatment facility
Take；Water purification re-injection after being carried out in situ hexavalent chromium polluted wastewater treatment and handling, avoids waste water freight and environmental risk.
The equipment that the present invention designs passes through the proportionate relationship between each reactive material, each appearance of size reasonable in design
Device, finally make rationally to coordinate between each reaction vessel, can realize that maximum processing water is 5m3/ h, run within 24 hours, reach
Quickly and easily handle.
The present invention carries out air stirring using the compressed gas of automobile, has carried out reasonable utilization to resource, to a certain extent
Resource has been saved, has reduced energy expenditure.
Brief description of the drawings：
Fig. 1 present devices handle waste water flow chart；
Fig. 2 present device plane block plans；
1. integrated reacting area, 2. activity step ladders, 3. Portable eye baths, 4. electrical control cubicles, 5. Zhong Kong areas, 6. dosing areas,
7. sludge dewatering area；
Fig. 3 present device floor plans；
8. acid adjustment area, 9. reducing zones, 10. help coagulation zone, 11. flocculation zones, 12. alkali tune areas, 13. settling zones, 14. filtering areas,
15. sludge sump, 16. Rinsing Areas, 17. sludge pumps, 18. flushing pumps, 19. sour pumps, 20. reducing agent pumps, 21. alkali pumps, 22.PAC pumps,
23.PAM1 pumps, 24.PAM2 pumps, 25. acid tanks, 26. reducing agent grooves, 27. alkali groove 29.PAC groove 29.PAM grooves, 30. folded spiral shell dehydrations
Machine.
Embodiment
The present invention is described in more detail below in conjunction with the accompanying drawings, but the invention is not restricted to these embodiments.
The present invention provides a kind of hexavalent chromium polluted underground water movement cleaning treatment system, and the processing system includes one instead
Device is answered, pH on-line monitoring instrument, ORP on-line monitoring instrument, electromagnetic flowmeter, static pressure liquid level meter are provided with the reactor；On wherein
State detector to connect with corresponding dosage pump, and detect and respond accordingly；Air stirring is additionally provided with the reactor
Device, mud discharging mouth and discharge outlet.
The processing system of the present invention is made in the reactor by installing multiple detectors in an integrated reactor
Multiple processing steps of Cr VI can be completed, and further fix the reactor onboard, so as to realize mobile processing
Purpose.Necessary mud discharging mouth and discharge outlet are additionally provided with the reactor simultaneously, it is used for the water after processing and mud point
From export, the title of the equipment is not limited to mud discharging mouth, sewage draining exit, discharge outlet, leakage fluid dram etc., as long as playing similar effect just
Can be with.
In a kind of specific embodiment, the system also includes auxiliary equipment, and the auxiliary equipment is stored up including clear water
Deposit equipment, storage facility of mud, mud cake storage facilities, complex acid equipment and be provided with sour measuring pump, reducing agent prepare and storage set
It is standby and be provided with reducing agent pump, with alkali equipment, alkali pump, PAM storage facilities and set PAM pumps, waste water lifting pump and folded spiral shell dirty
Mud dewaterer.
These equipment are to complete the preparation for the related substances that each step needs and storage facilities in water treatment procedure, simultaneously
Corresponding pump is provided with each equipment, corresponding raw material is pumped into reactor and reacted, and these pumps also with reactor
Interior related detector such as pH detectors, redox potential detector or liquid level detector is chain, according to the setting of detector,
The switch of pump is carried out, so as to control the process of reaction.
In a kind of preferred embodiment, the concentration of the Cr VI of the system processing should be controlled in 800mg/L
Below；Effluent quality reaches country after processing《Groundwater quality standard》(GB/T14848-93) III category alignment request, i.e. sexavalence
Chromium≤0.05mg/L, pH=6.5-8.5.
The equipment of the present invention has good treatment effect to the Cr VI in the concentration range, and inventor also sends out
It is existing, the Cr VI of other concentration can also be handled, reach similar technique effect.
In a kind of preferred embodiment, the reactor and auxiliary equipment are installed on car.
The present invention also provides a kind of processing method of hexavalent chromium polluted waste water, and its feature is in methods described includes processing and used
Preparation process, waste water treatment step and sludge dewatering step of medicament etc., each processing step of the waste water treatment step exist
Carried out in one reactor；Preferably, the waste water treatment step comprises the following steps：Acidification step, reduction step, neutralize step
Suddenly, flocculation step, precipitation separating step, filtering adsorption step, pH readjustments step, sludge dewatering step.
Each processing step carries out being that the inventive method is different from similar process method in an integrated reactor
One of distinguishing feature.By rationally controlling the ratio of each material and reacting bar between each processing step of above-mentioned waste water
It is in same reactor that wastewater treatment is good that part is finally realized, Cr VI is converted, separated, is finally reached the mesh of purification
's.
In a kind of preferred embodiment, it is acidified in the acidification step using sulfuric acid, the pH after acidifying
=3, the concentration of sulfuric acid used is 2% (mass volume ratio)；It is preferred that the reducing agent that the reduction step uses is sodium hydrogensulfite,
Its dosage is 3~5 times of content of 6-valence Cr ions, and the concentration of sodium hydrogensulfite is 25% (mass volume ratio)；It is preferred that the neutralization
Step uses caustic soda to be neutralized, and the pH value after neutralization is 8, and the concentration of caustic soda is 10% (mass volume ratio)；It is preferred that institute
It is to add polyacrylamide to be precipitated to state flocculation step, and the volume of polyacrylamide crosses sludge pump and is delivered to spiral sludge dewatering machine
Dewater treatment is carried out, obtains dehydrated sludge cake, recovery uses.
The concentration of above-mentioned each material is inventor by being screened to obtain to multiple concentration, and these concentration are being reacted
There is preferable effect in process and reaction controlling, although other concentration can also realize similar technique effect, the present invention
Above-mentioned concentration can realize the relatively stable progress of above-mentioned each processing step, ensured being smoothed out for each reaction,
It ensure that each reaction of whole cycle is smoothed out in same reactor.
In a kind of preferred embodiment, wherein the concentration of the Cr VI is controlled in below 800mg/L；Processing
Effluent quality reaches country afterwards《Groundwater quality standard》(GB/T14848-93) III category alignment request, i.e. Cr VI≤
0.05mg/L, pH=6.5-8.5.
The processing method of the present invention has good treatment effect, inventor to the Cr VI in the concentration range
It has also been found that can also handle the Cr VI of other concentration, reach similar technique effect.
In a kind of preferred embodiment, carried out in the acidification step, neutralization procedure and flocculation reaction step
Air stirring, preferably described air stirring are stirred using the compressed gas of automobile.
Due to reactor being put onboard, air stirring can be carried out using the compressed gas of automobile, this is largely saved
About resource, reduces energy consumption.
In a kind of preferred embodiment, in the acidification step, accessing pending water is controlled by adding sulfuric acid
PH value is 2-4；Controlling potential is E=250-300mV in reduction step；The pH value that accessing pending water is controlled in neutralization procedure is 8-
8.5。
The control of above-mentioned each step pH value and current potential is factor very crucial in this method, is to realize automation, intelligence
The key of energyization, and guarantee finally can be by wastewater treatments to satisfactory committed step, and this is also inventor by wound
The result of the property made work.
In a kind of preferred embodiment, Waste Water Treatment process chart is shown in Fig. 1.Present treatment is using interval
Formula reactor, processing procedure are carried out successively in the following order：Waste water acidifying → hexavalent chrome reduction → neutralization reaction → flocculation reaction
Separation → filtering absorption → pH readjustments → the sludge dewatering of → precipitation.It can so ensure that every single step reaction is accurate in place, it is final to protect
Demonstrate,prove standard water discharge.Calculated according to main equipment capacity, it is 5m to design maximum processing water3/ h, take 24 hours and run.It is specific next
Say, each step is as follows：
First, wastewater treatment：
1st, waste water acidification step：Contaminated chromate waste water is transported to integrated reactor, pump water inlet by water pump
If electromagnetic flowmeter, instantaneous delivery and accumulation water can be shown.Sulfuric acid solution (air stirring) is added into acidification region, regulation is useless
The pH=2-4 (being adjusted depending on water quality situation) of water, sets pH on-line monitoring instrument in reactor, carries out VFC to measuring pump, ensure
PH is controlled between 2-4, untill pH stable.Acid adding measuring pump and pH on-line monitoring instrument are chain, automatic running.
2nd, hexavalent chrome reduction step：Reducing zone adds solution of sodium bisulfite, is trivalent by the hexavalent chrome reduction in waste water
Chromium (air stirring).Waste water current potential E=250-300mV (being adjusted depending on water quality situation) after reaction.ORP on-line monitorings are set in reactor
Instrument, as waste water current potential E ＜ 250mV, illustrate that Cr VI is up to standard, VFC is carried out to measuring pump, until current potential E=250-
Untill 300mV is stable.Reductant metering pump and ORP on-line monitoring instrument are chain, automatic running.
3rd, neutralization reaction step：Neutral zone adds sodium hydroxide solution (air stirring), adjusts the pH=8-8.5 of waste water,
Trivalent chromium is set to generate chromium hydroxide precipitation.Caustic dosage is by pH on-line monitoring instrument control systems.VFC is carried out to measuring pump, ensures pH
In reaction interval, untill pH stable.Add alkali measuring pump and pH on-line monitoring instrument chain, automatic running.
4th, flocculation reaction step：PAC solution (air stirring) is added in flocculation zone, dosage is 200-300mg/L or so
(adjustable, dosage is determined according to specific water quality situation).PAM solution (air stirring), dosage 3- are added helping coagulation zone
5mg/L or so (adjustable, dosage is determined according to specific water quality situation).Chromium hydroxide precipitation is formed compared with big flocculating body through flocculation reaction
Particle, it is easy to precipitation to separate.
5th, separating step is precipitated：Reacted waste water enters settling zone more than, and to ensure sedimentation effect, settling zone is set tiltedly
Plate filler, for the chromium hydroxide sludge after flocculation through gravitational settling, sludge is sink to reactor bottom, and top clear water enters lower one of work
Sequence.
6th, adsorption step is filtered：Settling zone water outlet should pass through activated carbon filtering absorption, it is ensured that discharged wastewater met the national standard.
7th, procedure of pH adjustment：Clear water after filtering enters Rinsing Area, and monitors the pH value of Rinsing Area, if pH exceedes discharge
Standard, appropriate acid adding is answered to adjust back.PH meter is inside set to be monitored pH value of waste water.Cr VI detector is set in clear water zone simultaneously, such as
Fruit water outlet Cr VI is exceeded, should be back to front end setting pot, re-starts processing, and clear water up to standard directly discharges.
2nd, sludge dewatering
The moisture percentage in sewage sludge of reactor bottom about 98% or so, drain into sludge sump storage.Dilute sludge sludge of sludge sump
Pump is delivered to dewaterer and carries out filtering means dehydration.Filtered water discharge, dehydrated sludge cake pack recovery.
Sludge quantity calculates：Sludge is mainly chromium hydroxide, and concentration is about 2 times of hexavalent chromium concentration.Cr VI in waste water
Concentration generates chromium hydroxide sludge 1600mg/L based on maximum 800mg/L.Handle water 5m3/ h, over dry sludge yield are
8Kg/h.Dilute sludge about 400L/h of moisture content 98% or so, about dehydrated sludge cake moisture content 80%, 40Kg/h.Folded Luo Tuoshuijichu
Reason ability is 10dg.ds/h (it is 10Kg to handle over dry sludge quantity per hour).PAM dosages are added by 3Kg/ ton over dry sludge,
PAM solution compound concentrations are based on 0.1%, consumption 30L/h.
According to mobile unit feature, dewaterer is from spiral sludge dewatering machine than convenient.Spiral sludge dewatering machine can be real
The full-range automatic operatings such as existing sludge conveying, metering, quenched, dehydration, cleaning.
Embodiment
The source of each material to being used in embodiment illustrates below, if not otherwise specified, used
Raw material and instrument are commercially available, are instruments and raw material commonly used in the art, as long as it can meet needs.
Device therefor and medicament of the present invention are all that market can buy acquisition.
The parameter of capital equipment is as follows：
1st, integrated reactor (containing Rinsing Area, sludge sump)：
Quantity：1
Specifications and models：7200×1800×2500mm
Technical parameter：Cell body PP materials (10mm)；
2nd, with acid tank
Quantity：1 set
Specifications and models：550×500×1500mm
Technical parameter：Cell body PP (10mm) material, air stirring.
3rd, sour measuring pump
Quantity：1
Measure pump type：MB0050, PVC material, flow Q=52L/h, pressure 1.0MPa, power of motor 0.25Kw, regulation
Measure 20-100%.
4th, reducing agent groove
Quantity：1 set
Specifications and models：550×500×1500mm
Technical parameter：Cell body PP (10mm) material, stir acc power 0.75Kw, speed of agitator 100-120r/min, stirring
Device diameter 200mm.
5th, reducing agent pump
Measure pump type：MB0125, PVC material, flow Q=126L/h, pressure 0.7MPa, power of motor 0.25Kw, adjust
Section amount 20-100%.
6th, with alkali groove
Quantity：1 set
Specifications and models：550×500×1500mm
Technical parameter：Cell body PP (10mm) material, air stirring.
7th, alkali pump
Quantity：1
Measure pump type：MB0125, PVC material, flow Q=126L/h, pressure 0.7MPa, power of motor 0.25Kw, adjust
Section amount 20-100%.
8th, PAC grooves
Quantity：1 set
Specifications and models：550×500×1500mm
Technical parameter：Cell body PP (10mm) material, air stirring.
9th, PAC pumps
Quantity：1
Measure pump type：MB0050, PVC material, flow Q=52L/h, pressure 1.0MPa, power of motor 0.25Kw, regulation
Measure 20-100%.
10th, PAM grooves
Quantity：1 set
Specifications and models：550×500×1500mm
Technical parameter：Cell body PP (10mm) material, air stirring.
11st, PAM pumps
Quantity：1
Measure pump type：MB0050, PVC material, flow Q=52L/h, pressure 1.0MPa, power of motor 0.25Kw, regulation
Measure 20-100%.
12nd, waste water lifting pump
Quantity：1
Specifications and models：sj17-2
Technical parameter：Flow Q=5m3/h；Lift H=20.5m；Power N=1.1Kw.
13rd, spiral sludge dewatering machine
Quantity：1 set
Specifications and models：DR130-1
Technical parameter：Appearance and size：2350 × 560 × 1255mm, main engine power：Helical axis 0.25Kw, mixer
0.55Kw.It is equipped with sludge pump type 25JYF-8, flow Q=2.5m3/h；Lift H=10m；Power N=0.25Kw.Flushing water pump
Model MB0420, flow Q=420L/h, pressure 0.4MPa power N=0.37Kw；PAM dosings pump type MB0125, flow Q=
120L/h, pressure 0.7MPa, power N=0.25Kw.
14th, pH monitors
Quantity：3 sets
Technical parameter：Range:0-14pH, -1999-1999mV；Precision:± 0.01PH, ± 1mV；Operating temperature：0-60
DEG C, power supply：220VAC/50Hz.Supporting sensor stand, cable.
15th, ORP monitors
Quantity：1 set
Technical parameter：Range:0-14pH, -1999-1999mV；Precision:± 0.01PH, ± 1mV；Operating temperature：0-60
DEG C, power supply：220VAC/50Hz.Supporting sensor stand, cable.
16th, electromagnetic flowmeter
Quantity：1 set
Specifications and models：DN40
Technical parameter：Measurement accuracy：± 0.5%R；Degree of protection：IP65；Power supply：220V/50Hz；Operating temperature：-10
℃-+40℃；Output：4-20mA electric currents export, RS485 interfaces；Show integrated flow 8, instantaneous delivery 5.
17th, static pressure liquid level meter
Quantity：7 sets
Specifications and models：0-2m
Technical parameter：Measurement range：0-2m；Use environment humidity：- 20 DEG C~+70 DEG C；Relative humidity：10%~90%；
Medium temperature：- 20 DEG C~+80 DEG C；Long-time stability：Better than 0.1%FS/；Temperature stability：± 0.2%/10 DEG C；Electricity
Source:：24VDC；Signal output：Two lines export 4~20mA.
The processing method of hexavalent chromium polluted water is specific as follows in the present embodiment：
First, the selection of equipment：
In view of convenient transportation, selection standard specifications of container model 45HQ, actual casing inside dimension：Length × width × height
=13.556 × 2.352 × 2.698m, outside dimension：13.716×2.438×2.896m.Complete set of equipments is placed in container.
Because mobile unit is limited by appearance and size, calculated according to main equipment capacity, it is 5m to design maximum processing water3/ h, takes
Run within 24 hours.
Specific place's polluted water concentration：Hexavalent chromium concentration should be controlled in below 800mg/L in equipment processing water.After processing
Effluent quality reaches country《Groundwater quality standard》(GB/T14848-93) III category alignment request, i.e. Cr VI≤0.05mg/
L, pH=6.5-8.5.
2nd, medicament is prepared and added：
1st, sulfuric acid (H2SO4) solution：
The reduction reaction of Cr VI needs to carry out in acid condition, first adds sulfuric acid solution regulation pH=2-4.By waste water
Inlet flow-patterm=7 are adjusted to pH=3 meters, concentrated sulfuric acid addition 50mg/L=50g/m3.Wastewater flow rate 5m3/ h, concentrated sulfuric acid consumption
0.25Kg/h.Sulfuric acid solution compound concentration is based on 2%, dilute sulfuric acid consumption 12.5L/h.
With acid tank technical parameter：550 × 500 × 1400mm of size, dischargeable capacity 300L, prepare 1 groove decoction and can be used
24h.Cell body PP (10mm) material, air stirring.
Dosing method：Measuring pump is added to reactor.From metering pump type：MB0050, PVC material, flow Q=52L/
H, pressure 1.0MPa, power of motor 0.25Kw, regulated quantity 20-100%.
2nd, reducing agent (sodium hydrogensulfite)：
Reducing agent theoretical consumption is 3 times of hexavalent chromium concentration, and actual dosage is 3-5 times of content of 6-valence Cr ions, by six
Valency chromium=800mg/L meters, sodium hydrogensulfite dosage 4000mg/L, wastewater flow rate 5m3/ h, consumption 20Kg/h.Compound concentration
25% meter, reductant solution consumption 80L/h.
Dispensing slot technical parameter：550 × 500 × 1500mm of size, dischargeable capacity 30L, prepare 1 groove decoction and can be used
3.75h.Cell body PP (10mm) material, stir acc power 0.75Kw, speed of agitator 100-120r/min, stirrer diameter 200mm.
Dosing method：Measuring pump is added to reactor.From metering pump type：MB0125, PVC material, flow Q=
126L/h, pressure 0.7MPa, power of motor 0.25Kw, regulated quantity 20-100%.
3rd, caustic soda (piece alkali)：
Containing the pH=8-8.5 that soda bath regulation waste water is added except the chromate waste water after chromium, chromium hydroxide precipitation is generated.In
Counted with reaction caustic dosage by pH=3 to pH=8, calculate caustic soda addition 40mg/L=40g/m3；Cr is pressed in precipitation reaction3+=
800mg/L is counted, caustic soda consumption amount 1846g/m3.Caustic soda total flow about 1886g/m3Left and right, wastewater flow rate 5m3/ h, flake caustic disappear
Consumption 9.43Kg/h.Alkali liquid compounding concentration is based on 10%, alkali lye consumption amount 94.3Kg/h, about 100L/h.
Dispensing slot technical parameter：550 × 500 × 1500mm of size, dischargeable capacity 300L, prepare 1 groove decoction and 3h can be used.
Cell body PP (10mm) material, air stirring.
Dosing method：Measuring pump is added to reactor.From metering pump type：MB0125, PVC material, flow Q=
126L/h, pressure 0.7MPa, power of motor 0.25Kw, regulated quantity 20-100%.
4th, aluminium polychloride (PAC)：
Add PAC and improve sedimentation effect.Dosage is based on 250mg/l waste water, wastewater flow rate 5m3/ h, PAC dosage
1.25Kg/h.Compound concentration 10%, PAC solution consumption 12.5L/h.
Dispensing slot technical parameter：550 × 500 × 1500mm of size, dischargeable capacity 300L, prepare 1 groove decoction and can be used
24h.Cell body PP (10mm) material, air stirring.
Dosing method：Measuring pump is added to reactor.From metering pump type：MB0050, PVC material, flow Q=52L/
H, pressure 1.0MPa, power of motor 0.25Kw, regulated quantity 20-100%.
5th, polyacrylamide (PAM)：
Add PAM and improve sedimentation effect.Dosage presses 5g/m3Waste water meter, wastewater flow rate 5m3/ h, PAM dosage 25g/h.Match somebody with somebody
Concentration 0.1% processed, PAM solution consumption amounts 25L/h.
Sludge dewatering contracting needs PAM solution consumption amounts 30L/h.
Dispensing slot technical parameter：550 × 500 × 1500mm of size, dischargeable capacity 300L, prepare 1 groove decoction and can be used
5.45h.Cell body PP (10mm) material, air stirring.
Dosing method：Measuring pump is added to reactor.From metering pump type：MB0050, PVC material, flow Q=52L/
H, pressure 1.0MPa, power of motor 0.25Kw, regulated quantity 20-100%.
3rd, processing step
1st, waste water is acidified：Contaminated chromate waste water is transported to integrated reactor by water pump, and pump water inlet sets electricity
Magnetic flowmeter, instantaneous delivery and accumulation water can be shown.Sulfuric acid solution (air stirring) is added into acidification region, adjusts waste water
PH=2-4 (is adjusted) depending on water quality situation, and pH on-line monitoring instrument is set in reactor, when pH monitors show the acid adding measuring pumps of pH ＞ 4
Start, when the stopping of the acid adding measuring pumps of pH ＜ 2, untill pH stable.Acid adding measuring pump and pH on-line monitoring instrument are chain, automatic fortune
OK.
2nd, hexavalent chrome reduction：Reducing zone adds solution of sodium bisulfite, is that trivalent chromium is (empty by the hexavalent chrome reduction in waste water
Gas agitating).Waste water current potential E=250-300mV (being adjusted depending on water quality situation) after reaction.ORP on-line monitoring instrument is set in reactor, when
Waste water current potential E ＞ 300mV, start reductant metering pump, as waste water current potential E ＜ 250mV, illustrate that Cr VI is up to standard, reducing agent meter
Measure pump to stop, untill current potential E=250-300mV is stable.Reductant metering pump and ORP on-line monitoring instrument are chain, automatic running.
3rd, neutralization reaction：Neutral zone adds sodium hydroxide solution (air stirring), adjusts the pH=8-8.5 of waste water, makes three
Valency chromium generates chromium hydroxide precipitation.Caustic dosage is by pH on-line monitoring instrument control systems.Start as pH ＜ 8 and add alkali measuring pump, as pH ＞
8.5 acid adding measuring pumps stop, untill pH stable.Add alkali measuring pump and pH on-line monitoring instrument chain, automatic running.
4th, flocculation reaction：PAC solution (air stirring) is added in flocculation zone, dosage is that 200-300mg/L or so (can
Adjust, dosage is determined according to specific water quality situation).PAM solution (air stirring), dosage 3-5mg/L are added helping coagulation zone
Left and right (adjustable, dosage is determined according to specific water quality situation).Chromium hydroxide precipitation forms larger floc particle through flocculation reaction,
It is easy to precipitation to separate.
5th, precipitation separation：Reacted waste water enters settling zone more than, and to ensure sedimentation effect, settling zone sets swash plate and filled out
Material, for the chromium hydroxide sludge after flocculation through gravitational settling, sludge is sink to reactor bottom, and top clear water enters next process.
6th, filtering absorption：Settling zone water outlet should pass through activated carbon filtering absorption, it is ensured that discharged wastewater met the national standard.
7th, pH is adjusted：Clear water after filtering enters Rinsing Area, and monitors the pH value of Rinsing Area, if pH exceedes discharge and marked
Standard, appropriate acid adding is answered to adjust back.PH meter is inside set to be monitored pH value of waste water.Cr VI detector is set in clear water zone simultaneously, if
Water outlet Cr VI is exceeded, should be back to front end setting pot, re-starts processing, and clear water up to standard directly discharges.
8th, sludge dewatering
The moisture percentage in sewage sludge of reactor bottom about 98% or so, drain into sludge sump storage.Dilute sludge sludge of sludge sump
Pump is delivered to dewaterer and carries out filtering means dehydration.Filtered water discharge, dehydrated sludge cake pack recovery.
Sludge quantity calculates：Sludge is mainly chromium hydroxide, and concentration is about 2 times of hexavalent chromium concentration.Cr VI in waste water
Concentration generates chromium hydroxide sludge 1600mg/L based on maximum 800mg/L.Handle water 5m3/ h, over dry sludge yield are
8Kg/h.Dilute sludge about 400L/h of moisture content 98% or so, about dehydrated sludge cake moisture content 80%, 40Kg/h.Folded Luo Tuoshuijichu
Reason ability is 10dg.ds/h (it is 10Kg to handle over dry sludge quantity per hour).PAM dosages are added by 3Kg/ ton over dry sludge,
PAM solution compound concentrations are based on 0.1%, consumption 30L/h.
Claims (10)
1. a kind of mobile process system of hexavalent chromium polluted underground water, it is characterised in that it is anti-that the processing system includes integration
Device is answered, pH on-line monitoring instrument, oxidation-reduction potential on-line monitoring instrument, electromagnetic flowmeter, static pressure liquid level are provided with the reactor
Meter；Wherein above-mentioned detector connects with corresponding dosage pump, and detect and respond accordingly；It is additionally provided with the reactor
Air agitator, mud discharging mouth and discharge outlet.
2. processing system as claimed in claim 1, the system also includes auxiliary equipment, and the auxiliary equipment is stored up including clear water
Deposit equipment, storage facility of mud, mud cake storage facilities, complex acid equipment and be provided with sour measuring pump, reducing agent prepare and storage set
It is standby and be provided with reducing agent pump, with alkali equipment and be provided with alkali pump, PAM storage facilities and set PAM pumps, waste water lifting pump and
Spiral sludge dewatering machine.
3. processing system as claimed in claim 1 or 2, the concentration of the Cr VI of the system processing is 200-800mg/L；It is excellent
The pH=6.5-8.5 of concentration water after below 0.05mg/L, processing of Cr VI after choosing processing.
4. the processing system as described in claim any one of 1-3, wherein the reactor and auxiliary equipment are installed on car；
It is preferred that the air agitator using compressed gas is provided with reactor.
5. a kind of processing method of hexavalent chromium polluted underground water, its feature is in the preparation that methods described includes processing medicament walks
Suddenly, waste water treatment step and sludge dewatering step, each processing step of the waste water treatment step are entered in a reactor
OK.
6. processing method as claimed in claim 5, the waste water treatment step comprises the following steps：Acidification step, recovery step
Suddenly, neutralization procedure, flocculation step, precipitation separating step, filtering adsorption step, pH readjustments step, sludge dewatering step.
7. processing method as claimed in claim 6, wherein being acidified in the acidification step using sulfuric acid, the pH=after acidifying
2-4, the mass volume ratio concentration of sulfuric acid used is 2%；It is preferred that the reducing agent that the reduction step uses is sodium hydrogensulfite, its
Dosage is 3~5 times of content of 6-valence Cr ions, and the mass volume ratio concentration of sodium hydrogensulfite is 25%；It is preferred that the neutralization procedure
Caustic soda is used to be neutralized, the pH=8-8.5 after neutralization, the mass volume ratio concentration of caustic soda is 10%；It is preferred that the wadding
Solidifying step is to add aluminium polychloride in flocculation zone, is precipitated helping coagulation zone to add polyacrylamide, is conveyed by sludge pump
Filtering means dehydration, dehydrated sludge cake pack recovery are carried out to dewaterer；It is preferred that the dewaterer is spiral sludge dewatering machine.
8. the processing method as described in claim any one of 5-7, wherein the concentration of the Cr VI is 200-800mg/L；It is preferred that
The concentration of Cr VI after processing is in below 0.05mg/L, pH=6.5-8.5.
9. the processing method as described in claim any one of 5-7, enter in the acidification step, neutralization procedure and flocculation reaction step
Row air stirring, preferably described air stirring are stirred using the compressed gas of automobile.
10. the processing method as described in claim any one of 5-7, in the acidification step, by add sulfuric acid control it is pending
The pH value of water is 2-4；Controlling potential is E=250-300mV in reduction step；The pH value that accessing pending water is controlled in neutralization procedure is
8-8.5。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710832803.7A CN107381880A (en) | 2017-09-15 | 2017-09-15 | A kind of mobile process system and method for hexavalent chromium polluted underground water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710832803.7A CN107381880A (en) | 2017-09-15 | 2017-09-15 | A kind of mobile process system and method for hexavalent chromium polluted underground water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107381880A true CN107381880A (en) | 2017-11-24 |
Family
ID=60350011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710832803.7A Pending CN107381880A (en) | 2017-09-15 | 2017-09-15 | A kind of mobile process system and method for hexavalent chromium polluted underground water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107381880A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108726805A (en) * | 2018-06-19 | 2018-11-02 | 河钢股份有限公司 | A kind of full automatic processing equipment and technique of chromate waste water |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2002353060A1 (en) * | 2001-12-05 | 2003-06-17 | Oculus Innovative Sciences, Inc. | Method and apparatus for producing negative and positive oxidative reductive potential (orp) water |
| CN201785224U (en) * | 2010-07-19 | 2011-04-06 | 江苏泽宇环境工程有限公司 | Waste water electrolysis treatment system |
| CN104529017A (en) * | 2014-12-10 | 2015-04-22 | 北京市环境保护科学研究院 | Treatment method and treatment device of electroplating mixed water |
| CN204454779U (en) * | 2015-01-14 | 2015-07-08 | 上海清浥环保科技有限公司 | Chromate waste water process integration apparatus |
| CN205856241U (en) * | 2016-08-01 | 2017-01-04 | 青岛洛克环保科技有限公司 | A kind of vehicular magnetic flocculation precipitation sewage-treatment plant |
-
2017
- 2017-09-15 CN CN201710832803.7A patent/CN107381880A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2002353060A1 (en) * | 2001-12-05 | 2003-06-17 | Oculus Innovative Sciences, Inc. | Method and apparatus for producing negative and positive oxidative reductive potential (orp) water |
| CN201785224U (en) * | 2010-07-19 | 2011-04-06 | 江苏泽宇环境工程有限公司 | Waste water electrolysis treatment system |
| CN104529017A (en) * | 2014-12-10 | 2015-04-22 | 北京市环境保护科学研究院 | Treatment method and treatment device of electroplating mixed water |
| CN204454779U (en) * | 2015-01-14 | 2015-07-08 | 上海清浥环保科技有限公司 | Chromate waste water process integration apparatus |
| CN205856241U (en) * | 2016-08-01 | 2017-01-04 | 青岛洛克环保科技有限公司 | A kind of vehicular magnetic flocculation precipitation sewage-treatment plant |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108726805A (en) * | 2018-06-19 | 2018-11-02 | 河钢股份有限公司 | A kind of full automatic processing equipment and technique of chromate waste water |
| CN108726805B (en) * | 2018-06-19 | 2024-01-05 | 河钢股份有限公司 | Full-automatic treatment equipment and process for chromium-containing wastewater |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105399273A (en) | Pretreatment method of high-concentration organic phosphorus wastewater and device | |
| CN102587448B (en) | Rainwater collecting and utilizing system and rainwater collecting and utilizing method adopting same | |
| CN105000708A (en) | Waste emulsion quantitative reduction processing technology and apparatus | |
| CN106881319A (en) | The plastic box purging system and its method of work of a kind of sewage zero-discharge | |
| CN107381880A (en) | A kind of mobile process system and method for hexavalent chromium polluted underground water | |
| CN103193370A (en) | Phosphorus recovery device for excess sludge | |
| CN106045263A (en) | Efficient deep dehydration system for sludge | |
| CN105967493A (en) | 'One-stop' solution system and 'one-stop' solution method for tap water plant sludge treatment | |
| CN106430704A (en) | Movable integrated coating wastewater treating device and treating method thereof | |
| CN203112675U (en) | System for reclaiming phosphorus from residual sludge | |
| CN206751493U (en) | Fenton iron mud regeneration device and Fenton method sewage disposal systems | |
| CN216472411U (en) | Pigment waste water treatment device | |
| CN206188528U (en) | Portable integration application effluent treatment plant | |
| CN209352684U (en) | It is a kind of waste water advanced except fluorine treatment system | |
| CN204824442U (en) | A device for giving up emulsion decrement treatment process | |
| CN105293821B (en) | General chemical industry sewage disposal fundamental technology | |
| CN105293766B (en) | Heavy industries sewage disposal fundamental technology | |
| CN1319879C (en) | Electrolytic aluminium factory production waste water disposal method | |
| CN207943962U (en) | A kind of coating wastewater processing unit | |
| CN208916952U (en) | Mine water integrated combination settler | |
| CN206590993U (en) | A kind of aqueous architectural coating waste water decoloring device | |
| CN209906509U (en) | Tunnel construction sewage treatment plant | |
| CN205907168U (en) | Sludge treatment system of water treatment plant | |
| CN217025452U (en) | Device for integrally removing ammonia nitrogen in wastewater | |
| CN205115118U (en) | Heavy metal sewage treatment system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171124 |
|
| RJ01 | Rejection of invention patent application after publication |