CN106977003A - Electrical conductivity and the method and apparatus of total iron in a kind of cold rolling hydrochloric acid acid regeneration waste water of reduction - Google Patents
Electrical conductivity and the method and apparatus of total iron in a kind of cold rolling hydrochloric acid acid regeneration waste water of reduction Download PDFInfo
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- CN106977003A CN106977003A CN201610028804.1A CN201610028804A CN106977003A CN 106977003 A CN106977003 A CN 106977003A CN 201610028804 A CN201610028804 A CN 201610028804A CN 106977003 A CN106977003 A CN 106977003A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- 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
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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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
- C02F1/52—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
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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- 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
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- 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
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- C—CHEMISTRY; METALLURGY
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- 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
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- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/005—Processes using a programmable logic controller [PLC]
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- C02F2209/05—Conductivity or salinity
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2209/06—Controlling or monitoring parameters in water treatment pH
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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Abstract
It is a kind of to reduce the processing method and system of cold rolling hydrochloric acid acid regeneration conductivity of waste water and total iron, the cold rolling hydrochloric acid acid regeneration waste water enters integral type dosing sedimentation basin, in 1000~2500mg/L of integral type dosing sedimentation basin addition calcium hydroxide or sodium hydroxide, pH value is controlled more than 10, meanwhile, 5~15mg/L of addition compounding flocculation aid in situ.After cold rolling hydrochloric acid acid regeneration waste water, calcium hydroxide or sodium hydroxide and compounding flocculation aid in situ are mixed in integral type dosing sedimentation basin front portion, into PH regulating reservoirs, waste water PH is between 6~9 for regulation.Subsequently into Powder ash adsorption tower, periodic backwash processing, the cold rolling hydrochloric acid acid regeneration waste water thus handled are carried out.Technique according to the invention scheme, can reduce environmental pollution, respond actively increasingly strict legislations of environmental protection.
Description
Technical field
The invention belongs to water-treatment technology field, and in particular to one kind is used to efficiently reduce the cold rolling hydrochloric acid of field of metallurgy
Electrical conductivity and the method and apparatus of total iron in acid regeneration waste water.
Background technology
Steel and iron industry is a high energy consumption, high resource, the industry of high pollution, and its water resources consumption is huge, accounts for
The 14% of national industrial water consumption.
In July, 2005, National Development and Reform Committee put into effect《Steel industry development policies》, development of iron ＆ steel industry is circulated
It is economical, save the energy and resource, walk sustainable development path and propose higher target and more specifically require,
In the case where global resources are in short supply, the need for low energy consumption, low stain, low emission turn into social development.
The unit water consumption of Iron and Steel Enterprises in China remains above the level of external advanced iron and steel enterprise, further reduces
Iron and steel enterprise's ton steel consumes new water, improves the cyclic utilization rate of iron and steel enterprise's water, strengthens iron and steel enterprise's waste water
Comprehensive treatment ＆ reuse is that Iron and Steel Enterprises in China realizes one of key of sustainable development.
Cold rolling hydrochloric acid acid regeneration waste water refers to regenerate hydrochloric acid and oxidation using spray roasting (i.e. " Shandong hereby nanofarad ")
The waste water that iron powder is produced when reclaiming.Not only electrical conductivity is high but also total iron content is high for this waste water, and directly discharge will be to ring
Cause to have a strong impact in border.
Therefore, increase and dynamics studied to cold rolling hydrochloric acid acid regeneration waste water, formulating has targetedly processing scheme,
Explore and remove electrical conductivity and the technique and method of total iron, the sustainable development to realizing enterprise in regeneration of hydrochloric acid waste water
It is significant with energy-saving and emission-reduction.
Up to the present, also not for reducing electrical conductivity and total iron process and side in cold rolling hydrochloric acid acid regeneration waste water
Method.
The content of the invention
In view of the above-mentioned problems, it is an object of the invention to：A kind of cold rolling hydrochloric acid acid regeneration waste water conductance of reduction is provided
The processing method and its system and device of rate and total iron, the cold rolling hydrochloric acid acid regeneration conductivity of waste water of reduction of the invention and
The processing method and its system and device of total iron according to cold rolling hydrochloric acid acid regeneration waste water quality water situation, develop through
The technical scheme of Ji, efficient reduction electrical conductivity and total iron, reduces environmental pollution, and system solves regeneration of hydrochloric acid
The problem of contaminated wastewater environment, increasingly strict legislations of environmental protection is responded actively, therefore the invention belongs to steel
Environmental protection production-process systems.
To realize the purpose of the present invention, the technical solution adopted by the present invention is as follows：
It is a kind of to reduce the processing method of cold rolling hydrochloric acid acid regeneration conductivity of waste water and total iron, using including being configured with alkali
Liquid automatic medicament feeding system and the integral type dosing sedimentation basin of automatic control flocculation aid medicine system, it is configured with sour medicine system
PH regulating reservoirs and Powder ash adsorption tower be used for reduce the place of cold rolling hydrochloric acid acid regeneration conductivity of waste water and total iron
Manage system and device, it is characterised in that
The cold rolling hydrochloric acid acid regeneration waste water, which enters, is provided with alkali lye automatic medicament feeding system and automatic control flocculation aid dosing system
The integral type dosing sedimentation basin of system, in integral type dosing sedimentation basin, the alkali lye automatic medicament feeding system adds hydrogen-oxygen
Change cold rolling hydrochloric acid acid regeneration in 1000~2500mg/L of calcium or sodium hydroxide, control integral type dosing sedimentation basin to give up
The pH value of water more than 10,
Meanwhile, by automatic control flocculation aid medicine system integral type dosing sedimentation basin addition compounding flocculation aid 5 in situ~
15mg/L, original position compounding flocculation aid is that poly dimethyl allyl ammonium chloride/polyaluminium sulfate compounding original position helps solidifying
Agent,
Cold rolling hydrochloric acid acid regeneration waste water, calcium hydroxide or sodium hydroxide and compounding flocculation aid in situ are in integral type dosing
After sedimentation basin front portion is mixed, from the outflow of integral type dosing sedimentation basin, adjusted by one-level elevator pump into PH
Pond, sour medicine system is automatically controlled by PLC adds hydrochloric acid, and waste water PH is between 6~9 for regulation,
Then, cold rolling hydrochloric acid acid regeneration waste water is entered in Powder ash adsorption tower, adsorption tower by two-stage hoisting pump again
Modified coal ash filler is placed, modified coal ash filler accounts for the 75~90% of whole adsorption tower volume, whole fine coal
Grey adsorption tower carries out periodic backwash processing,
Residence time of the cold rolling hydrochloric acid acid regeneration waste water in Powder ash adsorption tower is 45~75min,
Thus the cold rolling hydrochloric acid acid regeneration waste water handled.
According to it is of the present invention it is a kind of reduce the processing method of cold rolling hydrochloric acid acid regeneration conductivity of waste water and total iron, its
It is characterised by, once, backwashing time is 4-6min for whole Powder ash adsorption tower 40-65min backwashes,
Thus the cold rolling hydrochloric acid acid regeneration waste water handled.
According to it is of the present invention it is a kind of reduce the processing method of cold rolling hydrochloric acid acid regeneration conductivity of waste water and total iron, its
It is characterised by, cold rolling hydrochloric acid acid regeneration waste water, calcium hydroxide and compounding flocculation aid in situ are all added and added in integral type
The anterior mixing area of medicine sedimentation basin, mixes and the progress high speed rotation of double-layer spiral agitator is provided with area,
Ensure to be well mixed, residence time of the cold rolling hydrochloric acid acid regeneration waste water in mixed zone is 60~180s.
According to it is of the present invention it is a kind of reduce the processing method of cold rolling hydrochloric acid acid regeneration conductivity of waste water and total iron, its
It is characterised by, integral type dosing sedimentation basin front portion is that stirring mixed zone, rear portion are that row is arranged at sloping plate deposition district, bottom
Mud pipeline and valve.Simultaneously alkali lye automatic medicament feeding system include medicament calcium hydroxide or sodium hydroxide, dosing pump and
PLC robot control system(RCS)s, PLC robot control system(RCS)s are connected in stirring mixed zone and place PH on-Line Monitor Devices.
According to it is of the present invention it is a kind of reduce the processing method of cold rolling hydrochloric acid acid regeneration conductivity of waste water and total iron, its
It is characterised by, when acid regeneration waste water PH is more than 10 in dosing sedimentation basin, stopping adds calcium hydroxide or hydrogen-oxygen
Change sodium, PH is continuously excessively added when being less than 10.
According to it is of the present invention it is a kind of reduce the processing method of cold rolling hydrochloric acid acid regeneration conductivity of waste water and total iron, its
It is characterised by, technique prepared by compounding flocculation aid in situ of the invention is as follows：
The polyaluminum sulfate aluminum solutions of preparation 85%, are heated to 45~55 DEG C, mixing speed is 10-30 revs/min,
30~60min is at the uniform velocity stirred, 90~95% poly dimethyl allyl ammonium chloride is added dropwise, according to polymerised sulphur
Sour aluminum solutions volume equivalent adds poly dimethyl allyl ammonium chloride, during dropwise addition mixing speed be 30-40 turn/
Minute, dispersed with stirring to homogeneous phase solution forms poly dimethyl allyl ammonium chloride/polyaluminium sulfate compounding in situ
Flocculation aid.
The compounding flocculation aid in situ of the present invention is the water quality characteristicses for acid regeneration waste water and prepares, and is contributed to
The bigger flco for being easier precipitation is formed during grain thing precipitation.
According to it is of the present invention it is a kind of reduce the processing method of cold rolling hydrochloric acid acid regeneration conductivity of waste water and total iron, its
It is characterised by, then cold rolling hydrochloric acid acid regeneration waste water enters the sloping plate deposition of integral type dosing sedimentation basin by overflow
Area.Cold rolling hydrochloric acid acid regeneration waste water is 15~28min in the residence time of sloping plate deposition district.
Because cold rolling hydrochloric acid acid regeneration waste water can be produced in the case where PH is more than 10 in swash plate stacking area
Substantial amounts of iron containing sludge precipitation.Precipitation not remove only total iron in cold rolling hydrochloric acid acid regeneration waste water and become molysite
Precipitation, and some influence the ionic heavy metal of electrical conductivity also to be precipitated with flco, so as to reduce in waste water
Electrical conductivity.Integral type dosing sedimentation basin bottom discharge pipeline and valve connection plate and frame filter press, regular spoil disposal.
According to it is of the present invention it is a kind of reduce the processing method of cold rolling hydrochloric acid acid regeneration conductivity of waste water and total iron, its
It is characterised by,
Residence time of the cold rolling hydrochloric acid acid regeneration waste water in reaction tower is 45~75min.
Modified coal ash filler is developed for cold rolling hydrochloric acid acid regeneration waste water quality in Powder ash adsorption tower in the present invention
It is prepared from.Can not only filtering for modified coal ash filler adsorbs what is do not precipitated in integrated precipitating pond
Iron content particle and sludge, and Adsorption Effect electrical conductivity elevated various inorganic impurities and metal ingredient.It is preferred that
It is that once, backwashing time is 5min for whole Powder ash adsorption tower 55min backwash, or so hour
For a circulation water inlet cycle.
According to it is of the present invention it is a kind of reduce the processing method of cold rolling hydrochloric acid acid regeneration conductivity of waste water and total iron, its
It is characterised by, the preparation process of the modified coal ash filler is as follows：
1) flyash mainly uses the flyash from power plant's dedusting, and main component (mass percent) is
SiO2：51.6%；Al2O3：17.2%；Fe2O3：14.9%；CaO：6.3%；MgO：3.7%；Other compositions：
6.3%,
2) flyash is with according to solid-to-liquid ratio 1：8~10 are added in the concentrated sulfuric acid that mass fraction is 60-65%,
Clear water is washed after heating water bath after mixing, cooling, is dried, to improve the specific surface area of flyash, increase
Adsorptivity ability,
3) 1.5~4.2mol/L bromination myristyl benzyl dimethyl ammonium salt solution, flyash and bromination are prepared
Myristyl benzyl dimethyl ammonium salt solution solid-to-liquid ratio is 1-1.5：4-6 is mixed, middle temperature stirring, is cooled to after drying
Room temperature, the flyash after activation improves charge neutrality again by the surfactant-modified of fixed hydrophilic lipophilic group
Based on adsorption capacity,
4) 100 mesh sieves are crossed after flyash pulverizes, modified coal ash filler is obtained.
According to the processing method of a kind of cold rolling hydrochloric acid acid regeneration conductivity of waste water of reduction of the present invention and total iron, it is special
Levy and be, in step 1), the flyash bulk density is 657~865kg/m3, compactness 26.8~31.25%.
According to the processing method of a kind of cold rolling hydrochloric acid acid regeneration conductivity of waste water of reduction of the present invention and total iron, it is special
Levy and be, in step 2), the flyash mixes 15~25min, then 75-90 DEG C of heating water bath
40-50min, is washed 4-6 times after cooling with clear water, is placed in 100-110 DEG C of baking oven and is dried 2-3 hours.
Thus, flyash opens the hole closed originally, improves flyash by sulfuric acid activated processing
Specific surface area, adds adsorptivity ability.
Preferably, in step 2), the flyash mixes 20~25min, then 85-90 DEG C of water-bath
45min is heated, is washed after cooling with clear water 5 times, is placed in 105 DEG C of baking ovens and dries 2 hours.
According to the processing method of a kind of cold rolling hydrochloric acid acid regeneration conductivity of waste water of reduction of the present invention and total iron, it is special
Levy and be, in step 3), 1.5~4.2mol/L bromination myristyl benzyl dimethyl ammonium salt solution is prepared,
Flyash and bromination myristyl benzyl dimethyl ammonium salt solution solid-to-liquid ratio are 1-1.5：4.5-5 is mixed, middle temperature stirring
After dry, be cooled to room temperature.
According to it is of the present invention it is a kind of reduce the processing method of cold rolling hydrochloric acid acid regeneration conductivity of waste water and total iron, its
Be characterised by, after process route processing of the invention, cold rolling hydrochloric acid acid regeneration wastewater effluent water quality be PH be 6~
9, electrical conductivity is 6500~11000us/cm, and total iron is 1~11mg/L.
According to the processing method of a kind of cold rolling hydrochloric acid acid regeneration conductivity of waste water of reduction of the present invention and total iron,
The water quality characteristic of the cold rolling hydrochloric acid acid regeneration waste water：PH is 1~2, and electrical conductivity is 17000~31000
Us/cm, total iron is 189~623mg/L.
The present invention also provides the processing system device of a kind of cold rolling hydrochloric acid acid regeneration conductivity of waste water of reduction and total iron,
Its technical scheme is as follows：
It is a kind of to reduce the processing system device of cold rolling hydrochloric acid acid regeneration conductivity of waste water and total iron, including it is provided with alkali
The integral type dosing sedimentation basin of liquid automatic medicament feeding system and automatic control flocculation aid medicine system, is provided with sour medicine system
PH regulating reservoirs and Powder ash adsorption tower, it is characterised in that
The integral type dosing sedimentation basin includes stirring mixed zone 6, sets the sloping plate deposition on the side of stirring mixed zone 6
Area 7, sets the spoil disposal pipeline and valve 8 of the lower section of sloping plate deposition district 7,
The cold rolling hydrochloric acid acid regeneration waste water, which enters, is provided with alkali lye automatic medicament feeding system and automatic control flocculation aid dosing system
The integral type dosing sedimentation basin of system, in integral type dosing sedimentation basin, addition calcium hydroxide or sodium hydroxide 1000~
The pH value of cold rolling hydrochloric acid acid regeneration waste water is more than 10 in 2500mg/L, integral type dosing sedimentation basin,
Simultaneously by automatic control flocculation aid medicine system in integral type dosing sedimentation basin addition compounding flocculation aid 5~15 in situ
Mg/L,
Cold rolling hydrochloric acid acid regeneration waste water enters PH by one-level elevator pump again after the outflow of integral type dosing sedimentation basin
Regulating reservoir, sour medicine system is automatically controlled by PLC adds hydrochloric acid, adjusts the PH of waste water between 6~9,
Then cold rolling hydrochloric acid acid regeneration waste water is entered by two-stage hoisting pump put in Powder ash adsorption tower, adsorption tower again
The modified coal ash filler for backwash is put, modified coal ash filler accounts for the 75~90% of whole adsorption tower volume,
The cold rolling hydrochloric acid acid regeneration waste water handled through draining pump.
According to a kind of cold rolling hydrochloric acid acid regeneration conductivity of waste water of reduction of the present invention and the processing system bulk cargo of total iron
Put, it is characterised in that the integral type dosing sedimentation basin anterior mixing sets the double of rotation at a high speed in area
Helical layer agitator.
According to a kind of cold rolling hydrochloric acid acid regeneration conductivity of waste water of reduction of the present invention and the processing system bulk cargo of total iron
Put, it is characterised in that the alkali lye automatic medicament feeding system includes dosing pump and PLC robot control system(RCS)s, PLC automatic controls
System is connected in stirring mixed zone and places PH on-Line Monitor Devices.
According to it is of the present invention it is a kind of reduce the processing method of cold rolling hydrochloric acid acid regeneration conductivity of waste water and total iron, its
It is characterised by, integral type dosing sedimentation basin bottom discharge pipeline and valve are connected to the plate and frame filter press of regular spoil disposal.
According to a kind of cold rolling hydrochloric acid acid regeneration conductivity of waste water of reduction of the present invention and the processing system bulk cargo of total iron
Put, it is characterised in that the modified coal ash filler crosses 100 mesh sieves, the flyash bulk density after pulverizing
For 657~865kg/m3, compactness 26.8~31.25%.
Present invention firstly provides complete cold rolling hydrochloric acid acid regeneration waste water reduction electrical conductivity and the technical side of total iron
Case, technical scheme treatment effect is stable, and production run cost is low, belongs to environmentally friendly steel
Green production system.
Brief description of the drawings
Fig. 1 reduces the processing system schematic diagram of cold rolling hydrochloric acid acid regeneration conductivity of waste water and total iron to be a kind of.
In figure, 1 is raw water pump, and 2 be calcium hydroxide automatic medicament feeding system, and 3 be automatic control flocculation aid medicine system,
4 be compounding flocculation aid in situ, and 5 be integral type dosing sedimentation basin, and 6 be stirring mixed zone, and 7 be sloping plate deposition district,
8 be spoil disposal pipeline and valve, and 9 be one-level elevator pump.10 be sour medicine system, and 11 be PH regulating reservoirs, 12
It is Powder ash adsorption tower for two-stage hoisting pump, 13,14 be modified coal ash, and 15 be draining pump.
Embodiment
Embodiment
Patent for a better understanding of the present invention, with reference to the content of embodiment the present invention is furture elucidated patent,
But the content of patent of the present invention is not limited solely to the following examples.
The present invention is elaborated with reference to the accompanying drawings and examples.
Embodiment 1：
It is a kind of to reduce the processing system of cold rolling hydrochloric acid acid regeneration conductivity of waste water and total iron, including raw water pump 1, hydrogen
Calcium oxide automatic medicament feeding system 2, automatic control flocculation aid medicine system 3, compounding flocculation aid 4 in situ, integral type dosing
Sedimentation basin 5, stirring mixed zone 6, sloping plate deposition district 7, spoil disposal pipeline and valve 8, one-level elevator pump 9, acid
Medicine system 10, PH regulating reservoirs 11, two-stage hoisting pump 12, Powder ash adsorption tower 13, modified coal ash 14,
Draining pump 15.
The water quality characteristic of the cold rolling hydrochloric acid acid regeneration waste water：PH is 1.2, and electrical conductivity is 28000us/cm,
Total iron is 520mg/L.
The cold rolling hydrochloric acid acid regeneration waste water enters integral type dosing sedimentation basin by raw water pump, and integral type dosing is sunk
Shallow lake pond front portion is that stirring mixed zone, rear portion are that spoil disposal pipeline and valve are arranged at sloping plate deposition district, bottom.While alkali lye
Automatic medicament feeding system includes medicament calcium hydroxide or sodium hydroxide, dosing pump and PLC robot control system(RCS)s, PLC automatic controls
System is connected in stirring mixed zone and places PH on-Line Monitor Devices.
Calcium hydroxide dosage is 2100mg/L, and alkali lye automatic medicament feeding system PLC connections pH value is monitored on-line,
Control pH value of cold rolling hydrochloric acid acid regeneration waste water in integral type dosing sedimentation basin stops adding hydrogen-oxygen after 10.9
Change calcium.
Compounding flocculation aid in situ that automatic control flocculation aid medicine system includes depositing in tank body and tank body, dosing pump and
PLC robot control system(RCS)s.PLC robot control system(RCS)s ensure that the dosage of compounding flocculation aid in situ is 11mg/L.
The compounding flocculation aid in situ of the present invention is the water quality characteristicses for acid regeneration waste water and prepares, and is contributed to
The bigger flco for being easier precipitation is formed during grain thing precipitation.The technique of preparation：The polyaluminium sulfate for preparing 85% is molten
Liquid, is heated to 55 DEG C, and mixing speed is 15 revs/min, at the uniform velocity stirs 45min, be added dropwise 90% it is poly-
Dimethyl diallyl ammonium chloride, poly dimethyl allyl chlorine is added according to polyaluminium sulfate liquor capacity equivalent
Change amine, mixing speed is changed to 30 revs/min during dropwise addition, and dispersed with stirring to homogeneous phase solution forms poly dimethyl two
Pi-allyl ammonium chloride/polyaluminium sulfate compounding flocculation aid in situ.
Cold rolling hydrochloric acid acid regeneration waste water, calcium hydroxide and compounding flocculation aid in situ are all before integral type dosing sedimentation basin
The mixing area in portion, the double-layer spiral agitator mixed in area rotates at a high speed, it is ensured that well mixed,
The residence time of mixed zone is 120s.
Then cold rolling hydrochloric acid acid regeneration waste water enters the sloping plate deposition district of integral type dosing sedimentation basin by overflow.It is cold
It is 23min to roll hydrochloric acid acid regeneration waste water in the residence time of sloping plate deposition district, and swash plate stacking area produces substantial amounts of contain
Iron sludge settling.Integral type dosing sedimentation basin bottom discharge pipeline and valve connection plate and frame filter press, regular spoil disposal.
Cold rolling hydrochloric acid acid regeneration waste water enters PH by one-level elevator pump again after the outflow of integral type dosing sedimentation basin
Regulating reservoir, sour medicine system is automatically controlled by PLC adds hydrochloric acid, adjusts the PH of waste water 7.9.
Then cold rolling hydrochloric acid acid regeneration waste water is entered by two-stage hoisting pump put in Powder ash adsorption tower, adsorption tower again
Modified coal ash filler is put, modified coal ash filler accounts for the 85% of whole adsorption tower volume.Cold rolling hydrochloric acid acid regeneration
Residence time of the waste water in reaction tower is 65min.Whole Powder ash adsorption tower 55min is backwashed once,
Backwashing time is 5min, and a hour is a circulation water inlet cycle.
The preparation process of the modified coal ash filler is as follows：1) powder of the flyash essentially from power plant's dedusting
Coal ash, main component (mass percent) is SiO2：51.6%；Al2O3：17.2%；Fe2O3：14.9%；
CaO：6.3%；MgO：3.7%；Other compositions：6.3%.The flyash bulk density is 752kg/m3, it is close
Solidity 27.8%.2) flyash is with according to solid-to-liquid ratio 1：10 are added to the concentrated sulfuric acid that mass fraction is 65%
In, 20min is mixed, then 85 DEG C of heating water bath 45min, are washed 5 times with clear water after cooling, be placed in
Dried 2 hours in 105 DEG C of baking ovens.Flyash is opened the hole closed originally, carried by sulfuric acid activated processing
The high specific surface area of flyash, adds adsorptivity ability.3) 2.9mol/L bromination myristyl is prepared
Benzyl dimethyl ammonium salt solution, flyash and bromination myristyl benzyl dimethyl ammonium salt solution solid-to-liquid ratio are 1：5 mixing,
Stirred after mixing at a temperature of 40 DEG C, 105 DEG C of drying 6 hours is cooled to room temperature.Fine coal after activation
Ash by the surfactant-modified of fixed hydrophilic lipophilic group, improves the adsorption capacity based on charge neutrality again.4)
Flyash crosses 100 mesh sieves after pulverizing, and obtains modified coal ash filler.
After Powder ash adsorption tower, cold rolling hydrochloric acid acid regeneration waste water is discharged by draining pump
After the process route processing of the present invention, cold rolling hydrochloric acid acid regeneration wastewater effluent water quality is that PH is 8.2, conductance
Rate is 8900us/cm, and total iron is 3.7mg/L.
Embodiment 2：
A kind of to reduce the processing system of cold rolling hydrochloric acid acid regeneration conductivity of waste water and total iron, raw water pump, alkali lye are automatic
Medicine system, automatic control flocculation aid medicine system, compounding flocculation aid in situ, integral type dosing sedimentation basin, stirring are mixed
Close area, sloping plate deposition district, spoil disposal pipeline and valve, one-level elevator pump, sour medicine system, PH regulating reservoirs, two
Level elevator pump, Powder ash adsorption tower, modified coal ash, draining pump.
The water quality characteristic of the cold rolling hydrochloric acid acid regeneration waste water：PH is 1.9, and electrical conductivity is 22000us/cm,
Total iron is 313mg/L.
The cold rolling hydrochloric acid acid regeneration waste water enters integral type dosing sedimentation basin by raw water pump, and integral type dosing is sunk
Shallow lake pond front portion is that stirring mixed zone, rear portion are that spoil disposal pipeline and valve are arranged at sloping plate deposition district, bottom.While alkali lye
Automatic medicament feeding system includes medicament calcium hydroxide or sodium hydroxide, dosing pump and PLC robot control system(RCS)s, PLC automatic controls
System is connected in stirring mixed zone and places PH on-Line Monitor Devices.
Sodium hydroxide dosage is 1300mg/L, and alkali lye automatic medicament feeding system PLC connections pH value is monitored on-line,
When controlling the pH value of the cold rolling hydrochloric acid acid regeneration waste water in integral type dosing sedimentation basin 11.1, stopping adds hydrogen
Sodium oxide molybdena, it is continuous again when PH is less than 10 excessively to add.
Compounding flocculation aid in situ that automatic control flocculation aid medicine system includes depositing in tank body and tank body, dosing pump and
PLC robot control system(RCS)s.PLC robot control system(RCS)s ensure that the dosage of compounding flocculation aid in situ is 7mg/L.
The compounding flocculation aid in situ of the present invention is the water quality characteristicses for acid regeneration waste water and prepares, and is contributed to
The bigger flco for being easier precipitation is formed during grain thing precipitation.The technique of preparation：The polyaluminium sulfate for preparing 85% is molten
Liquid, is heated to 45 DEG C, and mixing speed is 15 revs/min, at the uniform velocity stirs 60min, be added dropwise 95% it is poly-
Dimethyl diallyl ammonium chloride, poly dimethyl allyl chlorine is added according to polyaluminium sulfate liquor capacity equivalent
Change amine, mixing speed is changed to 30 revs/min during dropwise addition, and dispersed with stirring to homogeneous phase solution forms poly dimethyl two
Pi-allyl ammonium chloride/polyaluminium sulfate compounding flocculation aid in situ.
Cold rolling hydrochloric acid acid regeneration waste water, calcium hydroxide and compounding flocculation aid in situ are all before integral type dosing sedimentation basin
The mixing area in portion, the double-layer spiral agitator mixed in area rotates at a high speed, it is ensured that well mixed,
The residence time of mixed zone is 60s.
Then cold rolling hydrochloric acid acid regeneration waste water enters the sloping plate deposition district of integral type dosing sedimentation basin by overflow.It is cold
It is 27min to roll hydrochloric acid acid regeneration waste water in the residence time of sloping plate deposition district.Arrange integral type dosing sedimentation basin bottom
Mud pipe and valve connection plate and frame filter press, regular spoil disposal.
Cold rolling hydrochloric acid acid regeneration waste water enters PH by one-level elevator pump again after the outflow of integral type dosing sedimentation basin
Regulating reservoir, sour medicine system is automatically controlled by PLC adds hydrochloric acid, adjusts the PH of waste water between 6.7.
Then cold rolling hydrochloric acid acid regeneration waste water is entered by two-stage hoisting pump put in Powder ash adsorption tower, adsorption tower again
Modified coal ash filler is put, modified coal ash filler accounts for the 90% of whole adsorption tower volume.Cold rolling hydrochloric acid acid regeneration
Residence time of the waste water in reaction tower is 70min.Modified coal ash filler in Powder ash adsorption tower in the present invention
It is prepared from for the exploitation of cold rolling hydrochloric acid acid regeneration waste water quality.Modified coal ash filler can not only filter suction
The iron content particle and sludge not precipitated in attached integrated precipitating pond, and Adsorption Effect electrical conductivity is elevated
Various inorganic impurities and metal ingredient.Once, backwashing time is for whole Powder ash adsorption tower 55min backwashes
5min a, hour is a circulation water inlet cycle.
The preparation process of the modified coal ash filler is as follows：1) powder of the flyash essentially from power plant's dedusting
Coal ash, main component (mass percent) is SiO2：51.6%；Al2O3：17.2%；Fe2O3：14.9%；
CaO：6.3%；MgO：3.7%；Other compositions：6.3%.The flyash bulk density is 657~865kg/m3,
Compactness 26.8~31.25%.2) flyash is with according to solid-to-liquid ratio 1：8 are added to mass fraction for 65%
The concentrated sulfuric acid in, mix 15min, then 85 DEG C of heating water bath 45min, 5 are washed after cooling with clear water
It is secondary, it is placed in 105 DEG C of baking ovens and dries 2 hours.Flyash opens original closing by sulfuric acid activated processing
Hole, improve the specific surface area of flyash, add adsorptivity ability.3) 4.1mol/L bromine is prepared
Change myristyl benzyl dimethyl ammonium salt solution, flyash and bromination myristyl benzyl dimethyl ammonium salt solution solid-to-liquid ratio
For 1：5 mixing, are stirred, 105 DEG C of drying 6 hours is cooled to room temperature after mixing at a temperature of 40 DEG C.
Flyash after activation is improved based on charge neutrality again by the surfactant-modified of fixed hydrophilic lipophilic group
Adsorption capacity.4) 100 mesh sieves are crossed after flyash pulverizes, modified coal ash filler is obtained.
After Powder ash adsorption tower, cold rolling hydrochloric acid acid regeneration waste water is discharged by draining pump
After the process route processing of the present invention, cold rolling hydrochloric acid acid regeneration wastewater effluent water quality is that PH is 7.1, conductance
Rate is 6900us/cm, and total iron is 4.2mg/L.
In summary, present invention firstly provides electrical conductivity in the cold rolling hydrochloric acid acid regeneration waste water of complete reduction and always
Iron technical scheme, the problem of system solves regeneration of hydrochloric acid contaminated wastewater environment, therefore it is green the invention belongs to steel
Colour circle protects production-process systems.
Claims (12)
1. a kind of reduce the processing method of cold rolling hydrochloric acid acid regeneration conductivity of waste water and total iron, using including being configured with
Alkali lye automatic medicament feeding system and the integral type dosing sedimentation basin of automatic control flocculation aid medicine system, it is configured with sour dosing system
Being used for of the PH regulating reservoirs of system and Powder ash adsorption tower reduces cold rolling hydrochloric acid acid regeneration conductivity of waste water and total iron
Processing system device, it is characterised in that
The cold rolling hydrochloric acid acid regeneration waste water, which enters, is provided with alkali lye automatic medicament feeding system and automatic control flocculation aid dosing system
The integral type dosing sedimentation basin of system, in integral type dosing sedimentation basin, the alkali lye automatic medicament feeding system adds hydrogen-oxygen
Change cold rolling hydrochloric acid acid regeneration in 1000~2500mg/L of calcium or sodium hydroxide, control integral type dosing sedimentation basin to give up
The pH value of water more than 10,
Meanwhile, by automatic control flocculation aid medicine system integral type dosing sedimentation basin addition compounding flocculation aid 5 in situ~
15mg/L, original position compounding flocculation aid is that poly dimethyl allyl ammonium chloride/polyaluminium sulfate compounding original position helps solidifying
Agent,
Cold rolling hydrochloric acid acid regeneration waste water, calcium hydroxide or sodium hydroxide and compounding flocculation aid in situ are in integral type dosing
After sedimentation basin front portion is mixed, from the outflow of integral type dosing sedimentation basin, adjusted by one-level elevator pump into PH
Pond, sour medicine system is automatically controlled by PLC adds hydrochloric acid, and waste water PH is between 6~9 for regulation,
Then, cold rolling hydrochloric acid acid regeneration waste water is entered in Powder ash adsorption tower, adsorption tower by two-stage hoisting pump again
Modified coal ash filler is placed, modified coal ash filler accounts for the 75~90% of whole adsorption tower volume, whole fine coal
Grey adsorption tower carries out periodic backwash processing,
Residence time of the cold rolling hydrochloric acid acid regeneration waste water in Powder ash adsorption tower is 45~75min,
Thus the cold rolling hydrochloric acid acid regeneration waste water handled.
2. a kind of as claimed in claim 1 reduce the processing side of cold rolling hydrochloric acid acid regeneration conductivity of waste water and total iron
Method, it is characterised in that once, backwashing time is 4-6min for whole Powder ash adsorption tower 40-65min backwashes,
Thus the cold rolling hydrochloric acid acid regeneration waste water handled.
3. a kind of as claimed in claim 1 reduce the processing side of cold rolling hydrochloric acid acid regeneration conductivity of waste water and total iron
Method, it is characterised in that cold rolling hydrochloric acid acid regeneration waste water, calcium hydroxide and compounding flocculation aid in situ are all added one
The anterior mixing area of body formula dosing sedimentation basin, mixes and double-layer spiral agitator progress height is provided with area
Speed rotation, it is ensured that well mixed, residence time of the cold rolling hydrochloric acid acid regeneration waste water in mixed zone is 60~180s.
4. a kind of as claimed in claim 1 reduce the processing side of cold rolling hydrochloric acid acid regeneration conductivity of waste water and total iron
Method, it is characterised in that technique prepared by compounding flocculation aid in situ of the invention is as follows：
The polyaluminum sulfate aluminum solutions of preparation 85%, are heated to 45~55 DEG C, mixing speed is 10-30 revs/min,
30~60min is at the uniform velocity stirred, 90~95% poly dimethyl allyl ammonium chloride is added dropwise, according to polymerised sulphur
Sour aluminum solutions volume equivalent adds poly dimethyl allyl ammonium chloride, during dropwise addition mixing speed be 30-40 turn/
Minute, dispersed with stirring to homogeneous phase solution forms poly dimethyl allyl ammonium chloride/polyaluminium sulfate compounding in situ
Flocculation aid.
5. a kind of as claimed in claim 1 reduce the processing side of cold rolling hydrochloric acid acid regeneration conductivity of waste water and total iron
Method, it is characterised in that and then cold rolling hydrochloric acid acid regeneration waste water enters the oblique of integral type dosing sedimentation basin by overflow
Plate settling zone, cold rolling hydrochloric acid acid regeneration waste water is 15~28min in the residence time of sloping plate deposition district.
6. a kind of as claimed in claim 1 reduce the processing side of cold rolling hydrochloric acid acid regeneration conductivity of waste water and total iron
Method, it is characterised in that the preparation process of the modified coal ash filler is as follows：
1) flyash mainly uses the flyash from power plant's dedusting, and main component (mass percent) is
SiO2：51.6%；Al2O3：17.2%；Fe2O3：14.9%；CaO：6.3%；MgO：3.7%；Other compositions：
6.3%,
2) flyash is with according to solid-to-liquid ratio 1：8~10 are added in the concentrated sulfuric acid that mass fraction is 60-65%,
Clear water is washed after heating water bath after mixing, cooling, is dried, to improve the specific surface area of flyash, increase
Adsorptivity ability,
3) 1.5~4.2mol/L bromination myristyl benzyl dimethyl ammonium salt solution, flyash and bromination are prepared
Myristyl benzyl dimethyl ammonium salt solution solid-to-liquid ratio is 1-1.5：4-6 is mixed, middle temperature (45-50 degree) stirring, is done
Room temperature is cooled to after dry, the flyash after activation passes through the surfactant-modified of fixed hydrophilic lipophilic group again,
The adsorption capacity based on charge neutrality is improved,
4) 100 mesh sieves are crossed after flyash pulverizes, modified coal ash filler is obtained.
7. the processing method of a kind of cold rolling hydrochloric acid acid regeneration conductivity of waste water of reduction as claimed in claim 1 and total iron,
Characterized in that, in step 1), the flyash bulk density is 657~865kg/m3, compactness 26.8~
31.25%.
8. a kind of as claimed in claim 1 reduce the processing side of cold rolling hydrochloric acid acid regeneration conductivity of waste water and total iron
Method, it is characterised in that in step 2), the flyash mixes 15~25min, then 75-90 DEG C of water
Bath heating 40-50min, is washed 4-6 times after cooling with clear water, is placed in 100-110 DEG C of baking oven dry 2-3 small
When.
9. a kind of as claimed in claim 1 reduce the processing side of cold rolling hydrochloric acid acid regeneration conductivity of waste water and total iron
Method, it is characterised in that the cold rolling hydrochloric acid acid regeneration wastewater effluent water quality after final process is that PH is 6~9, electricity
Conductance is 6500~11000us/cm, and total iron is 1~11mg/L.
10. a kind of reduce the processing system device of cold rolling hydrochloric acid acid regeneration conductivity of waste water and total iron, its technical scheme
It is as follows：
It is a kind of to reduce the processing system device of cold rolling hydrochloric acid acid regeneration conductivity of waste water and total iron, including it is provided with alkali
The integral type dosing sedimentation basin of liquid automatic medicament feeding system and automatic control flocculation aid medicine system, is provided with sour medicine system
PH regulating reservoirs and Powder ash adsorption tower, it is characterised in that
The integral type dosing sedimentation basin includes stirring mixed zone (6), the swash plate for setting stirring mixed zone (6) other
Settling zone (7), sets the spoil disposal pipeline and valve (8) below sloping plate deposition district (7),
The cold rolling hydrochloric acid acid regeneration waste water, which enters, is provided with alkali lye automatic medicament feeding system and automatic control flocculation aid dosing system
The integral type dosing sedimentation basin of system, in integral type dosing sedimentation basin, addition calcium hydroxide or sodium hydroxide 1000~
The pH value of cold rolling hydrochloric acid acid regeneration waste water is more than 10 in 2500mg/L, integral type dosing sedimentation basin,
Simultaneously by automatic control flocculation aid medicine system in integral type dosing sedimentation basin addition compounding flocculation aid 5~15 in situ
Mg/L,
Cold rolling hydrochloric acid acid regeneration waste water enters PH by one-level elevator pump again after the outflow of integral type dosing sedimentation basin
Regulating reservoir, sour medicine system is automatically controlled by PLC adds hydrochloric acid, adjusts the PH of waste water between 6~9,
Then cold rolling hydrochloric acid acid regeneration waste water is entered by two-stage hoisting pump put in Powder ash adsorption tower, adsorption tower again
The modified coal ash filler for backwash is put, modified coal ash filler accounts for the 75~90% of whole adsorption tower volume,
The cold rolling hydrochloric acid acid regeneration waste water handled through draining pump.
11. a kind of as claimed in claim 10 reduce the processing system of cold rolling hydrochloric acid acid regeneration conductivity of waste water and total iron
Bulk cargo is put, it is characterised in that the alkali lye automatic medicament feeding system includes dosing pump and PLC robot control system(RCS)s, PLC
Robot control system(RCS) is connected in stirring mixed zone and places PH on-Line Monitor Devices.
12. a kind of as claimed in claim 10 reduce the processing system of cold rolling hydrochloric acid acid regeneration conductivity of waste water and total iron
Bulk cargo is put, it is characterised in that the modified coal ash filler crosses 100 mesh sieves, the flyash accumulation after pulverizing
Density is 657~865kg/m3, compactness is 26.8~31.25%.
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