CN105366872B - A kind of ecological treatment system and method for the reverse osmosis concentrated salt solution of cold rolling - Google Patents

A kind of ecological treatment system and method for the reverse osmosis concentrated salt solution of cold rolling Download PDF

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CN105366872B
CN105366872B CN201410441161.4A CN201410441161A CN105366872B CN 105366872 B CN105366872 B CN 105366872B CN 201410441161 A CN201410441161 A CN 201410441161A CN 105366872 B CN105366872 B CN 105366872B
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cold rolling
reverse osmosis
salt solution
osmosis concentrated
concentrated salt
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CN105366872A (en
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叶倩
吕维群
糜建青
黄翔峰
张宜莓
徐竟成
朱荣健
赵雪兵
陆斌
李恩超
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Tongji University
Baoshan Iron and Steel Co Ltd
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Tongji University
Baoshan Iron and Steel Co Ltd
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Abstract

The present invention provides a kind of ecological treatment system and method for the reverse osmosis concentrated salt solution of cold rolling, and the processing system includes water inlet pipe, intake chamber, water distribution dividing plate, water inlet gravel commutating zone, flyash ceramic particulate filler, manganese sand media, sand bedding course, impervious barrier, modified montmorillonite used filler, earthing, plant, water outlet gravel commutating zone, effluent trough, water outlet Liquid level, outlet pipe.Reverse osmosis concentrated salt solution is handled using the ecological treatment system of the present invention, one-time investment is low, and operation is simple to operate, and production processing cost is relatively low;The reverse osmosis concentrated salt solution of cold rolling is after ecological treatment system is handled, and COD and total nitrogen are less than discharging standards in effluent quality, and all kinds of heavy metals in strong brine are also efficiently removed, and are the green handling process of environmentally friendly steel wastewater.

Description

A kind of ecological treatment system and method for the reverse osmosis concentrated salt solution of cold rolling
Technical field
The invention belongs to water-treatment technology field, and in particular to a kind of ecological treatment system of the reverse osmosis concentrated salt solution of cold rolling and Method.
Background technology
The unit water consumption of Iron and Steel Enterprises in China remains above the level of external advanced iron and steel enterprise, further reduces steel Enterprise's ton steel consumes new water, improves the cyclic utilization rate of iron and steel enterprise's water, strengthens the integrated treatment of iron and steel enterprise's waste water with returning With being one of key that Iron and Steel Enterprises in China realizes sustainable development.
Country is just stepping up to the discharge standard of waste water and " energy-saving and emission-reduction " policy of correlation at present, October 1 in 2012 Rise day and promulgated newly《Steel and iron industry pollution discharge standard》(GB13456-2012) while require from January 1st, 2015 Rise.Waste water recycling is the final goal of wastewater treatment, and domestic cold rolling wastewater further treatment technique is to use reverse osmosis technology will Reuse is as iron and steel enterprise's Municipal Sewage for Circulating after cold rolling wastewater advanced treating, but existing subject matter is caused by counter-infiltration The processing of strong brine.
Great potential be present in terms of the ecological environment of wetland plant repairing complex edge sea, utilize autumn muscle wetland, beach good reputation wetland Improvement, absorption heavy metal and the deep-water net cage culture area of organic contamination are carried out in terms of coastal wastewater treatment with tangleweed etc. Reparation of eutrophication water etc., and achieve good effect.It is aquatic that a variety of salt tolerants are have studied using Batch Flow Constructed Wetlands Plant finds in certain purification entered under the conditions of water conductivity to pollutant:The plant for wherein having 2/3 can be in corresponding salinity Middle normal growth.
By consulting patent and documents and materials, also the Ecological Disposal side without the processing for the reverse osmosis concentrated salt solution of cold rolling Method.
The processing of the reverse osmosis concentrated salt solution of cold rolling is urgent problem to be solved.The reverse osmosis concentrated salt solution of cold rolling except salt content height with Outside, also containing a variety of intractable harmful substances such as high COD, high total nitrogen and all kinds of heavy metals, artificial swamp is as a kind of new The reverse osmosis concentrated salt solution of ecological sewage treatment technology advanced treating cold rolling wastewater is technically new breakthrough.
The content of the invention
In order to solve the problems, such as the environmental pollution of the reverse osmosis concentrated salt solution of cold rolling, it is an object of the invention to provide a kind of cold rolling The ecological treatment system and method for reverse osmosis concentrated salt solution, using the ecosystem of the present invention, one-time investment is low, operation operation letter Single, production processing cost is relatively low;The reverse osmosis concentrated salt solution of cold rolling is after ecological treatment system is handled, COD and total in effluent quality Nitrogen is less than discharging standards, and all kinds of heavy metals in strong brine are also efficiently removed, and are that environmentally friendly steel wastewater is green Color environment-friendly treating process.
The technical solution of the present invention is as follows:
A kind of ecological treatment system of the reverse osmosis concentrated salt solution of cold rolling, including water inlet pipe, the water inlet pipe are sequentially connected into water Groove, water distribution dividing plate, water inlet gravel commutating zone, packing area, water outlet gravel commutating zone, effluent trough, outlet pipe;In the water inlet gravel The bottom of commutating zone, packing area and water outlet gravel commutating zone sets gradually impervious barrier and sand bedding course;In the water inlet gravel rectification The top in area, packing area and water outlet gravel commutating zone sets overburden layer, the planting plants on the overburden layer;The filler is distinguished For lytag packing area, manganese sand media area, modified montmorillonite used packing area.
According to the ecological treatment system of the reverse osmosis concentrated salt solution of cold rolling of the present invention, it is preferred that the flyash ceramic Lytag packing material size in particulate filler area is the mm of 10 mm~30, and bulk density is 620~800Kgm-3, porosity For 2~35%, loss on ignition is 0~0.2%, compression strength >=1.5MPa.
According to the ecological treatment system of the reverse osmosis concentrated salt solution of cold rolling of the present invention, it is preferred that the flyash ceramic Flyash ceramic particulate filler in particulate filler area is made up of mass percent of 75~88% flyash and 12~25% clay.
According to the ecological treatment system of the reverse osmosis concentrated salt solution of cold rolling of the present invention, it is further preferred that, the powder Flyash ceramic particulate filler in flyash haydite packing area by flyash that mass percent is 82~86% and 14~18% it is viscous Soil is made.
According to the ecological treatment system of the reverse osmosis concentrated salt solution of cold rolling of the present invention, it is preferred that the fine coal ashing Study point by percentage to the quality:SiO2:45~65%;Al2O3:18~35%;Fe2O3:2~11%;CaO:1~7%;FeO: 0.5~1.0%;MgO:0.5~3%;The loss on ignition of the flyash:1~4%.
According to the ecological treatment system of the reverse osmosis concentrated salt solution of cold rolling of the present invention, it is further preferred that, the powder Coal ash chemical composition is by percentage to the quality:SiO2:56~60%;Al2O3:25~30%;Fe2O3:5~8%;CaO:4~ 6%;FeO:0.8~1.0%;MgO:1~2%.
According to the ecological treatment system of the reverse osmosis concentrated salt solution of cold rolling of the present invention, it is preferred that the flyash Particle diameter is 15~30 mm, and the uniformity is 85%~98%.
According to the ecological treatment system of the reverse osmosis concentrated salt solution of cold rolling of the present invention, it is preferred that the clay chemistry Composition is by percentage to the quality:SiO2:60~75%;Al2O3:8~15%;Fe2O3:2~11%;CaO:1~6%;MgO:0.5 ~2%;The loss on ignition of the clay:3~7%.
According to the ecological treatment system of the reverse osmosis concentrated salt solution of cold rolling of the present invention, it is further preferred that, it is described viscous Native chemical composition is by percentage to the quality:SiO2:70~73%;Al2O3:9~14%;Fe2O3:5~8%;CaO:3~5%; MgO:1~1.5%.
According to the ecological treatment system of the reverse osmosis concentrated salt solution of cold rolling of the present invention, it is preferred that the manganese sand media Manganese sand media particle diameter in area is 25~32mm;The chemical composition of manganese sand media is by percentage to the quality:MnO2:30~50%, SiO2:18~25%, Fe:20~30%.
According to the ecological treatment system of the reverse osmosis concentrated salt solution of cold rolling of the present invention, it is preferred that modified cover takes off Modified montmorillonite used particle diameter in hardcore area is 35~75 mm, and gum level is 2~15ml/g, cation exchange capacity 0.5 ~1.0mmol/g, Absorbance ratio-derivative method 0.2~0.5 g/g, 10~35kPa of wet compressive strengths, hot green tensile strength 0.5~1.0kPa are swollen Swollen capacity is 5~25%.
According to the ecological treatment system of the reverse osmosis concentrated salt solution of cold rolling of the present invention, it is preferred that the water distribution dividing plate Percent opening is 25%~55%, and eye diameter is 35~60 mm.
According to the ecological treatment system of the reverse osmosis concentrated salt solution of cold rolling of the present invention, it is preferred that the overburden layer The mm of thickness 160~280.
According to the ecological treatment system of the reverse osmosis concentrated salt solution of cold rolling of the present invention, it is preferred that in the sand bedding course Fineness of sand be not more than 50 mm, clay content is less than 5%.
The present invention also provides a kind of ecological treatment method of the reverse osmosis concentrated salt solution of cold rolling, the described cold rolling of methods described application The ecological treatment system of reverse osmosis concentrated salt solution, comprises the following steps:
The reverse osmosis concentrated salt solution of cold rolling enters intake chamber by water inlet pipe, is designed with triangular-notch weir on intake chamber, passes through control Distribution channel water level constant processed adjusts flow of inlet water;The strong brine of intake chamber enters water inlet gravel commutating zone by water distribution dividing plate, so Enter packing area afterwards, the strong brine is 3~5 d in the packing area residence time;The reverse osmosis concentrated salt solution of cold rolling is behind packing area Into water outlet gravel commutating zone, effluent trough is entered back into, by the discharge of water outlet Liquid level outlet pipe.
According to the ecological treatment method of the reverse osmosis concentrated salt solution of cold rolling of the present invention, the reverse osmosis concentrated salt solution warp of cold rolling The water quality crossed after the ecological treatment system processing:The μ s/cm of electrical conductivity 1810~7800, COD is 10~30mg/L, and pH is 6.90~7.80, turbidity 1~5 NTU, 0.1~2.3mg/L of ammonia nitrogen, 1.6~8.2mg/L of total nitrogen, 0~0.1mg/L of total phosphorus, oils For 0~2.67 mg/L, chromium is 0~0.01 mg/L, and iron is 0~0.7 mg/L, and Zn is 0~0.1mg/L, and Ni is 0~0.1 mg/ L。
The technical solution adopted by the present invention is described in detail:
1. a kind of salt content of the reverse osmosis concentrated salt solution of cold rolling of the present invention is high, containing the high spy of hardly degraded organic substance and heavy metal Kind industrial wastewater.
The water quality of the reverse osmosis concentrated salt solution of cold rolling wastewater:Electrical conductivity 1810~7800 μ s/cm, COD are 10~60mg/L, PH is 6.91~8.40, and turbidity 1~19 NTU, DO are 3~5 mg/L, 0.1~6.3mg/L of ammonia nitrogen, 2.6~12.3mg/ of total nitrogen L, 0~0.5mg/L of total phosphorus, oils are 0~7.77 mg/L, and chromium is 0~0.02 mg/L, and iron is 0~1.2 mg/L, Zn is 0~ 0.3 mg/L, Ni are 0~0.3 mg/L.
2. the invention provides the ecological wetland treatment system of the processing reverse osmosis concentrated salt solution of cold rolling of complete set.The system Including water inlet pipe, intake chamber, water distribution dividing plate, water inlet gravel commutating zone, flyash ceramic particulate filler, manganese sand media, sand bedding course, antiseepage Layer, modified montmorillonite used filler, earthing, plant, water outlet gravel commutating zone, effluent trough, water outlet Liquid level, outlet pipe.
The reverse osmosis concentrated salt solution of cold rolling enters intake chamber by water inlet pipe, is designed with triangular-notch weir on intake chamber, passes through control Distribution channel water level constant processed adjusts flow of inlet water.The strong brine of intake chamber enters water inlet gravel commutating zone by water distribution dividing plate.Institute It is 25%~55% to state water distribution dividing plate percent opening, and eye diameter is 35~60 mm.Preferred aperture rate is 35%, and eye diameter is 40 mm.The water inlet gravel commutating zone function is that the energy of waste water fluid stream obtains certain elimination in water inlet commutating zone, makes waste water Current more uniformly enter filler settling zone.
Then cold rolling strong brine enters packing area, and filler divides into flyash packing area, manganese sand media (filtrate) Qu Hegai Property montmorillonite packing area.Three packing area volumes respectively account for 1/3rd.
Flyash packing area.The flyash dispensing:Chemical composition of PCA (mass percent) is mainly SiO2:45~ 65%;Al2O3:18~35%;Fe2O3:2~11%;CaO:1~7%;FeO:0.5~1.0%;MgO:0.5~3%;Burn and lose Amount:1~4%.The particle diameter of flyash is 15~30 mm, and the uniformity is 85%~98%.Clay chemistry composition (mass percent) Predominantly SiO2:60~75%;Al2O3:8~15%;Fe2O3:2~11%;CaO:1~6%;MgO:0.5~2%;Loss on ignition: 3~7%.Clay mainly plays binding agent.Prepare composition proportion (mass percent) flyash in haydite for 75~ 88%, clay is 12~25%.The preparation of the flyash:1) it is homogenized and is granulated:Mixed and be homogenized using ball mill, in ageing 48 With ball disk machine balling-up after~72 hours, high temperature sintering is then carried out.2) high-temperature sintering process:2a) dry:Electric drying oven with forced convection Middle drying, drying temperature are 105 DEG C, and drying time is 1~2 hour;2b) preheat:In chamber type electric resistance furnace 1 is preheated at 150 DEG C ~3 hours;3) it is calcined:Completed in chamber type electric resistance furnace, 3a) temperature is first warming up to 500 DEG C by 150 DEG C, heating rate r=85 Constant temperature 1 hour, obtains optimal swelling state at~120 DEG C/h, 500 DEG C inside haydite.3b) and then 950 DEG C are warming up to, heating Speed is r=25~55 DEG C/h, and constant temperature 1 hour, because 500 DEG C~950 DEG C are glass transition phases, begins with melting at 900 DEG C Thing is generated, and heating should be slow, and this stage major part carbonate and sulfide are decomposed and produces gas, and gas is disengaged by fused mass to be made Fused mass expands.1150 DEG C 3c) are then heated to, heating rate is r=100 DEG C/h, and sintering temperature is 1150 DEG C, constant temperature 3h, 900 DEG C~1150 DEG C quick heating, this stage SiO2And A12O3Congruent melting effect takes place, forms substantial amounts of fused mass, Fe2O3Also decompose and reduction reaction, generate Fe and FeO iron fusant.3d) then natural cooling Fe and FeO iron fusant It is hardened after cooling.Cool down finished product haydite.Made haydite particle diameter is tested as the mm of 10 mm~30, rough coat is hard, and color is light Huang, inside there are many micropores, in grey black.
Lytag feature is hardness big, weather resistance, resistance to water erosion, in light weight, elasticity is good.The particle diameter of lytag is The mm of 10 mm~30, bulk density is 620~800Kgm-3, porosity is 2~35%, and loss on ignition is 0~0.2%, pressure resistance Degree >=1.5MPa.
The manganese sand filtering material is process using high-quality natural manganese ores, and outward appearance is brown, for underground water deferrization, removes Manganese filtering has the effect of uniqueness.The manganese sand filtering material particle diameter is 25~32mm, main chemical compositions:MnO2:30~50%, SiO2: 18~25%, Fe:20~30%.
The modified montmorillonite used packing area interlamellar spacing is big, and interlayer is changed into hydrophobicity from hydrophily, adsorbs Organic substance in water Ability is strong.Due to special nanostructured effect, it is modified montmorillonite used have structure function it is adjustable, can efficiently organics removal and oil Class material, it can repeatedly use, the advantages that saturated adsorption capacity is big.Further, the modified montmorillonite used particle diameter is 35~75 Mm, gum level are 2~15ml/g, and cation exchange capacity is 0.5~1.0mmol/g, the g/g of Absorbance ratio-derivative method 0.2~0.5, hygrometric state 10~35kPa of compression strength, 0.5~1.0kPa of hot green tensile strength, expansion volume are 5~25%.
Described filler layer upper strata is original soil overburden layer, and overburden layer is adapted to typha angustifolia plant growth, original soil overburden layer thickness 160~280 mm, preferably 190 mm.
The typha angustifolia perennial herb, rhizome grows wild in mud, sturdy, has most fibrous roots, and stem is upright, hollow, and tool is white Color marrow.Typha angustifolia is typical plant, and full typha angustifolia can form consociation, the high 1.0-1.5m of thick grass, covering Spend 30-50%.
Described filler layer lower floor is sand sand bedding course and impervious barrier.Major function is leakproof, and strong brine does not enter underground.
The sand bedding course grain composition is good, and scleroid middle sand or coarse sand, maximum particle size are not more than 50 mm, contain Mud amount should be less than 5%.
The impervious barrier uses high density polyethylene (HDPE) antiseepage film, 0.95~0.97g/cm of relative density2;Nontoxic, tasteless, nothing Smelly white particle, there is good heat resistance and cold resistance, chemical stability is good, has higher rigidity and toughness, anti-ageing Change and decay resistance is strong, mechanical tensile strength is good, and environmental stress cracking resistance is preferable.
The reverse osmosis concentrated salt solution of cold rolling enters commutating zone behind packing area, into effluent trough, by water outlet Liquid level The discharge of outlet pipe.
The reverse osmosis concentrated salt solution of cold rolling is 3~5 d in the residence time of ecological wetland.The reverse osmosis concentrated salt solution of cold rolling is by ecology After wetland variation, not only COD and total nitrogen are less than discharging standards, and all kinds of heavy metals in strong brine in effluent quality Efficiently removed.
Water quality of the reverse osmosis concentrated salt solution of cold rolling wastewater after wet land system is handled:The μ s/ of electrical conductivity 1810~7800 Cm, COD are 10~30mg/L, and pH is 6.90~7.80, turbidity 1~5 NTU, 0.1~2.3mg/L of ammonia nitrogen, total nitrogen 1.6~ 8.2mg/L, 0~0.1mg/L of total phosphorus, oils are 0~2.67 mg/L, and chromium is 0~0.01 mg/L, and iron is 0~0.7 mg/L, Zn For 0~0.1 mg/L, Ni is 0~0.1 mg/L.
Advantageous effects:
The ecological treatment system and method for the reverse osmosis concentrated salt solution of cold rolling provided by the invention, using the ecosystem of the present invention System, one-time investment is low, and operation is simple to operate, and production processing cost is relatively low;The reverse osmosis concentrated salt solution of cold rolling passes through Ecological Disposal system After system processing, COD and total nitrogen are less than discharging standards in effluent quality, and all kinds of heavy metals in strong brine are also efficiently gone Remove, be the green handling process of environmentally friendly steel wastewater.
The present invention develops economic, efficient reverse osmosis concentrated salt solution according to the reverse osmosis concentrated salt solution water quality and quantity situation of cold rolling Ecological treatment method.This method reduces environmental pollution, responded actively increasingly strict to build industrial park as main task Legislations of environmental protection.
Present invention firstly provides the Wetland ecological resolution of the reverse osmosis concentrated salt solution of cold rolling, at the Green Water of low cost Reason technology efficiently solves the reverse osmosis concentrated saline treatment problem of cold rolling.Therefore the present invention has economical and environmentally friendly double effectses, tool There are good social benefit and environmental benefit.
Brief description of the drawings
Fig. 1:It is the ecological treatment system schematic flow sheet of the reverse osmosis concentrated salt solution of cold rolling of the present invention.
In figure:Water inlet pipe -1, intake chamber -2, water distribution dividing plate -3, water inlet gravel commutating zone -4, lytag packing area - 5th, manganese sand media area -6, modified montmorillonite used packing area -7, water outlet gravel commutating zone -8, effluent trough -9, outlet pipe -10, impervious barrier - 11st, sand bedding course -12, overburden layer -13, plant -14, water outlet Liquid level -15.
Embodiment
For a better understanding of the present invention, the content that the present invention is furture elucidated with reference to the accompanying drawings and examples, but this The content of invention is not limited solely to the following examples.
The ecological treatment system of the reverse osmosis concentrated salt solution of cold rolling provided by the invention, including water inlet pipe, intake chamber, water distribution every Plate, water inlet gravel commutating zone, flyash ceramic particulate filler, manganese sand media, sand bedding course, impervious barrier, modified montmorillonite used filler, earthing, Plant, water outlet gravel commutating zone, effluent trough, water outlet Liquid level, outlet pipe.
Embodiment 1
The water quality of the reverse osmosis concentrated salt solution of cold rolling wastewater:Electrical conductivity 6800 μ s/cm, COD are 55 mg/L, pH 7.51, The NTU of turbidity 16, the mg/L of ammonia nitrogen 5.1, the mg/L of total nitrogen 11.3, the mg/L of total phosphorus 0.4, oils are 4.87 mg/L, chromium 0.01 Mg/L, iron are 0.7 mg/L, and Zn is 0.2 mg/L, and Ni is 0.2 mg/L.
The reverse osmosis concentrated salt solution of cold rolling enters intake chamber by water inlet pipe, is designed with triangular-notch weir on intake chamber, passes through control Distribution channel water level constant processed adjusts flow of inlet water.The strong brine of intake chamber enters water inlet gravel commutating zone by water distribution dividing plate.Institute It is 35% to state water distribution dividing plate percent opening, and eye diameter is 40 mm.The water inlet gravel commutating zone function is the energy of waste water fluid stream Certain elimination is obtained in water inlet commutating zone, waste water fluid stream is more uniformly entered filler settling zone.
Then cold rolling strong brine enters packing area, and filler divides into flyash packing area, manganese sand media (filtrate) Qu Hegai Property montmorillonite packing area.Three packing area volumes respectively account for 1/3rd.
Flyash packing area.The flyash dispensing:Chemical composition of PCA (mass percent) is mainly SiO2: 56%;Al2O3:25%;Fe2O3:8%;CaO:6%;FeO:1%;MgO:2%;Loss on ignition:2%.The particle diameter of flyash is 25mm, the uniformity are 96%.Clay chemistry composition (mass percent) is mainly SiO2:70%;Al2O3:14%;Fe2O3:5%; CaO:5%;MgO:1%;Loss on ignition:5%.Clay mainly plays binding agent.Prepare the composition proportion (quality hundred in haydite Point ratio) flyash be 82%, clay 18%.The preparation of the flyash:1) it is homogenized and is granulated:It is equal using ball mill mixing Change, with ball disk machine balling-up after being aged 68 hours, then carry out high temperature sintering.2) high-temperature sintering process:2a) dry:Electric heating rouses Dried in wind drying box, drying temperature is 105 DEG C, and drying time is 2 hours;2b) preheat:In chamber type electric resistance furnace at 150 DEG C Preheating 2 hours;3) it is calcined:Completed in chamber type electric resistance furnace, 3a) temperature is first warming up to 500 DEG C by 150 DEG C, heating rate r= Constant temperature 1 hour, obtains optimal swelling state at 100 DEG C/h, 500 DEG C inside haydite.3b) and then 950 DEG C are warming up to, heating speed Rate is r=45 DEG C/h, and constant temperature 1 hour, because 500 DEG C~950 DEG C are glass transition phases, begins with fused mass generation at 900 DEG C, Heating should be slow, and this stage major part carbonate and sulfide decompose and produces gas, and gas is disengaged by fused mass makes fused mass Expand.3c) then heating to 1150 DEG C, heating rate is r=100 DEG C/h, and sintering temperature is 1150 DEG C, constant temperature 3h, 900 DEG C~1150 DEG C of quick heating, this stage SiO2And A12O3Congruent melting effect takes place, forms substantial amounts of fused mass, Fe2O3Also send out Solution and reduction reaction estranged, generate Fe and FeO iron fusant.3d) and then after natural cooling Fe and FeO iron fusant cooling become Firmly.Cool down finished product haydite.It is 23 mm to test made haydite particle diameter, and rough coat is hard, and color is yellowish, inside there is many micropores, In grey black.
The particle diameter of lytag is 23 mm, and bulk density is 760 Kgm-3, porosity 25%, loss on ignition is 0.1%, compression strength >=1.5MPa.
The manganese sand filtering material is process using high-quality natural manganese ores, and outward appearance is brown, for underground water deferrization, removes Manganese filtering has the effect of uniqueness.The manganese sand filtering material particle diameter is 30 mm, main chemical compositions:MnO2:50%, SiO2:25%, Fe:25%.
The modified montmorillonite used packing area interlamellar spacing is big, and interlayer is changed into hydrophobicity from hydrophily, adsorbs Organic substance in water Ability is strong.Due to special nanostructured effect, it is modified montmorillonite used have structure function it is adjustable, can efficiently organics removal and oil Class material, it can repeatedly use, the advantages that saturated adsorption capacity is big.Further, the modified montmorillonite used particle diameter is 40 mm, Gum level is 10 ml/g, and cation exchange capacity is 0.7mmol/g, the g/g of Absorbance ratio-derivative method 0.4, the kPa of wet compressive strengths 30, The kPa of hot green tensile strength 0.8, expansion volume are 20%.
Described filler layer upper strata is original soil overburden layer, and overburden layer is adapted to typha angustifolia plant growth, and original soil overburden layer is preferred For 190 mm.
The typha angustifolia perennial herb, rhizome grows wild in mud, sturdy, has most fibrous roots, and stem is upright, hollow, and tool is white Color marrow.Typha angustifolia is typical plant, and full typha angustifolia can form consociation, the high 1.0-1.5m of thick grass, covering Spend 30-50%.
Described filler layer lower floor is sand sand bedding course and impervious barrier.Major function is leakproof, and strong brine does not enter underground.
The sand bedding course grain composition is good, and scleroid middle sand or coarse sand, maximum particle size are not more than 50 mm, contain Mud amount should be less than 5%.
The impervious barrier uses high density polyethylene (HDPE) antiseepage film, 0.95~0.97g/cm of relative density2;Nontoxic, tasteless, nothing Smelly white particle, there is good heat resistance and cold resistance, chemical stability is good, has higher rigidity and toughness, anti-ageing Change and decay resistance is strong, mechanical tensile strength is good, and environmental stress cracking resistance is preferable.
The reverse osmosis concentrated salt solution of cold rolling enters commutating zone behind packing area, into effluent trough, by water outlet Liquid level The discharge of outlet pipe.
The reverse osmosis concentrated salt solution of cold rolling is 4 d in the residence time of ecological wetland.The reverse osmosis concentrated salt solution of cold rolling is wet by ecology After ground processing, not only COD and total nitrogen are less than discharging standards in effluent quality, and all kinds of heavy metals in strong brine also by Efficiently remove.
Embodiment 2
The water quality of the reverse osmosis concentrated salt solution of cold rolling wastewater:Electrical conductivity 7600 μ s/cm, COD are 58 mg/L, pH 7.91, Turbidity 18NTU, the mg/L of ammonia nitrogen 5.1, the mg/L of total nitrogen 11.3, the mg/L of total phosphorus 0.4, oils are 4.87 mg/L, chromium 0.02 Mg/L, iron are 0.9 mg/L, and Zn is 0.3 mg/L, and Ni is 0.3 mg/L.
The reverse osmosis concentrated salt solution of cold rolling enters intake chamber by water inlet pipe, is designed with triangular-notch weir on intake chamber, passes through control Distribution channel water level constant processed adjusts flow of inlet water.The strong brine of intake chamber enters water inlet gravel commutating zone by water distribution dividing plate.Institute It is 40% to state water distribution dividing plate percent opening, and eye diameter is 42 mm.The water inlet gravel commutating zone function is the energy of waste water fluid stream Certain elimination is obtained in water inlet commutating zone, waste water fluid stream is more uniformly entered filler settling zone.
Then cold rolling strong brine enters packing area, and filler divides into flyash packing area, manganese sand media (filtrate) Qu Hegai Property montmorillonite packing area.Three packing area volumes respectively account for 1/3rd.
Flyash packing area.The flyash dispensing:Chemical composition of PCA (mass percent) is mainly SiO2: 60%;Al2O3:28%;Fe2O3:5%;CaO:4%;FeO:1%;MgO:2%;Loss on ignition:2%.The particle diameter of flyash is 28mm, the uniformity are 97%.Clay chemistry composition (mass percent) is mainly SiO2:73%;Al2O3:12%;Fe2O3:9%; CaO:5%;MgO:1%;Loss on ignition:5%.Clay mainly plays binding agent.Prepare the composition proportion (quality hundred in haydite Point ratio) flyash be 86%, clay 14%.The preparation of the lytag:1) it is homogenized and is granulated:Mixed using ball mill Homogenizing, with ball disk machine balling-up after being aged 65 hours, then carry out high temperature sintering.2) high-temperature sintering process:2a) dry:Electric heating Dried in air dry oven, drying temperature is 105 DEG C, and drying time is 2 hours;2b) preheat:150 DEG C in chamber type electric resistance furnace Lower preheating 2 hours;3) it is calcined:Completed in chamber type electric resistance furnace, 3a) temperature is first warming up to 500 DEG C by 150 DEG C, heating rate r Constant temperature 1 hour, obtains optimal swelling state at=110 DEG C/h, 500 DEG C inside haydite.3b) and then 950 DEG C are warming up to, heating Speed is r=50 DEG C/h, and constant temperature 1 hour, because 500 DEG C~950 DEG C are glass transition phases, begins with fused mass life at 900 DEG C Into heating should be slow, and this stage major part carbonate and sulfide decompose and produces gas, and gas is disengaged by fused mass makes melting Thing expands.1150 DEG C 3c) are then heated to, heating rate is r=100 DEG C/h, and sintering temperature is 1150 DEG C, constant temperature 3h, 900 DEG C~1150 DEG C quick heating, this stage SiO2And A12O3Congruent melting effect takes place, forms substantial amounts of fused mass, Fe2O3 Also decompose and reduction reaction, generate Fe and FeO iron fusant.3d) then natural cooling Fe and FeO iron fusant cooling After be hardened.Cool down finished product haydite.It is 23 mm to test made haydite particle diameter, and rough coat is hard, and color is yellowish, inside there is many Micropore, in grey black.
The particle diameter of lytag is 25 mm, and bulk density is 780 Kgm-3, porosity 25%, and loss on ignition is 0.1%, compression strength >=1.5MPa.
The manganese sand filtering material is process using high-quality natural manganese ores, and outward appearance is brown, for underground water deferrization, removes Manganese filtering has the effect of uniqueness.The manganese sand filtering material particle diameter is 29 mm, main chemical compositions:MnO2:50%, SiO2:25%, Fe:25%.
The modified montmorillonite used packing area interlamellar spacing is big, and interlayer is changed into hydrophobicity from hydrophily, adsorbs Organic substance in water Ability is strong.Due to special nanostructured effect, it is modified montmorillonite used have structure function it is adjustable, can efficiently organics removal and oil Class material, it can repeatedly use, the advantages that saturated adsorption capacity is big.Further, the modified montmorillonite used particle diameter is 40 mm, Gum level is 10 ml/g, and cation exchange capacity is 0.7mmol/g, the g/g of Absorbance ratio-derivative method 0.4, the kPa of wet compressive strengths 30, The kPa of hot green tensile strength 0.8, expansion volume are 20%.
Described filler layer upper strata is original soil overburden layer, and overburden layer is adapted to typha angustifolia plant growth, and original soil overburden layer is preferred For 190 mm.
The typha angustifolia perennial herb, rhizome grows wild in mud, sturdy, has most fibrous roots, and stem is upright, hollow, and tool is white Color marrow.Typha angustifolia is typical plant, and full typha angustifolia can form consociation, the high 1.0-1.5m of thick grass, covering Spend 30-50%.
Described filler layer lower floor is sand sand bedding course and impervious barrier.Major function is leakproof, and strong brine does not enter underground.
The sand bedding course grain composition is good, and scleroid middle sand or coarse sand, maximum particle size are not more than 50 mm, contain Mud amount should be less than 5%.
The impervious barrier uses high density polyethylene (HDPE) antiseepage film, 0.95~0.97g/cm of relative density2;Nontoxic, tasteless, nothing Smelly white particle, there is good heat resistance and cold resistance, chemical stability is good, has higher rigidity and toughness, anti-ageing Change and decay resistance is strong, mechanical tensile strength is good, and environmental stress cracking resistance is preferable.
The reverse osmosis concentrated salt solution of cold rolling enters commutating zone behind packing area, into effluent trough, by water outlet Liquid level The discharge of outlet pipe.
The reverse osmosis concentrated salt solution of cold rolling is 5 d in the residence time of ecological wetland.The reverse osmosis concentrated salt solution of cold rolling is wet by ecology After ground processing, not only COD and total nitrogen are less than discharging standards in effluent quality, and all kinds of heavy metals in strong brine also by Efficiently remove.
Through water quality of the reverse osmosis concentrated salt solution of the cold rolling wastewater of Examples 1 and 2 after wet land system is handled:Electrical conductivity 1810 ~7800 μ s/cm, COD are 10~30mg/L, and pH is 6.90~7.80, turbidity 1~5 NTU, 0.1~2.3mg/L of ammonia nitrogen, total nitrogen 1.6~8.2mg/L, 0~0.1mg/L of total phosphorus, oils are 0~2.67 mg/L, and chromium is 0~0.01 mg/L, and iron is 0~0.7 Mg/L, Zn are 0~0.1 mg/L, and Ni is 0~0.1 mg/L.
In summary, the Wetland ecological processing system of the reverse osmosis concentrated salt solution of cold rolling of the present invention realizes the dense salt of cold rolling The efficient improvement of water, present invention process one-time investment are low;Water treatment effect is stable;Production run cost is low;It is simple to operate. The present invention has fully demonstrated the effect of energy-saving and emission-reduction, is environmentally friendly green process for producing steel and iron.
Certainly, those skilled in the art in the art are it should be appreciated that above-described embodiment is intended merely to illustrate this hair It is bright, rather than as limitation of the invention, as long as in the spirit of the present invention, conversion, change to above-described embodiment Shape will all fall within the scope of the claims.

Claims (8)

1. a kind of ecological treatment system of the reverse osmosis concentrated salt solution of cold rolling, including water inlet pipe, it is characterised in that:The water inlet pipe is successively Connect intake chamber, water distribution dividing plate, water inlet gravel commutating zone, packing area, water outlet gravel commutating zone, effluent trough, outlet pipe;Described The bottom of water inlet gravel commutating zone, packing area and water outlet gravel commutating zone sets gradually impervious barrier and sand bedding course;In the water inlet The top of gravel commutating zone, packing area and water outlet gravel commutating zone sets overburden layer, the planting plants on the overburden layer;It is described Filler divides into lytag packing area, manganese sand media area, modified montmorillonite used packing area;
Flyash ceramic particulate filler in lytag packing area by flyash that mass percent is 75~88% and 12~ 25% clay is made;
Flyash ceramic particulate filler in lytag packing area is prepared by following methods:1) it is homogenized and is granulated:Using ball Grinding machine mixing homogenizing, with ball disk machine balling-up after being aged 48~72 hours, then carries out high temperature sintering;2) high-temperature sintering process: 2a) dry:Dried in electric drying oven with forced convection, drying temperature is 105 DEG C, and drying time is 1~2 hour;2b) preheat:In case Preheated 1~3 hour at 150 DEG C in formula resistance furnace;3) it is calcined:Completed in chamber type electric resistance furnace, 3a) temperature first heats up by 150 DEG C To 500 DEG C, heating rate is r=85~120 DEG C/h, and constant temperature 1 hour, obtains optimal swelling state inside haydite at 500 DEG C; 3b) and then it is warming up to 950 DEG C, heating rate is r=25~55 DEG C/h, constant temperature 1 hour at 900 DEG C, due to 500 DEG C~950 DEG C It is glass transition phases, begins with fused mass generation, heating should be slow, and this stage major part carbonate and sulfide decompose and produces gas Body, gas is disengaged by fused mass expands fused mass;3c) then heating to 1150 DEG C, heating rate is r=100 DEG C/ H, sintering temperature are 1150 DEG C, constant temperature 3h, 900 DEG C~1150 DEG C quick heating, this stage SiO2And A12O3Congruent melting takes place Effect, forms substantial amounts of fused mass, Fe2O3Also decompose and reduction reaction, generate Fe and FeO iron fusant;3d) then It is hardened after natural cooling Fe and FeO iron fusant cooling;Cool down finished product haydite;
Lytag packing material size in the lytag packing area is 10mm~30mm, bulk density is 620~ 800Kg·m-3, porosity is 2~35%, and loss on ignition is 0~0.2%, compression strength >=1.5MPa.
2. the ecological treatment system of the reverse osmosis concentrated salt solution of cold rolling according to claim 1, it is characterised in that the flyash Chemical composition is by percentage to the quality:SiO2:45~65%;Al2O3:18~35%;Fe2O3:2~11%;CaO:1~7%; FeO:0.5~1.0%;MgO:0.5~3%;The loss on ignition of the flyash:1~4%;The particle diameter of the flyash is 15~ 30mm, the uniformity are 85%~98%.
3. the ecological treatment system of the reverse osmosis concentrated salt solution of cold rolling according to claim 1, it is characterised in that the clay Study point by percentage to the quality:SiO2:60~75%;Al2O3:8~15%;Fe2O3:2~11%;CaO:1~6%;MgO: 0.5~2%;The loss on ignition of the clay:3~7%.
4. the ecological treatment system of the reverse osmosis concentrated salt solution of cold rolling according to claim 1, it is characterised in that the manganese sand is filled out Expect that the manganese sand media particle diameter in area is 25~32mm;The chemical composition of manganese sand media is by percentage to the quality:MnO2:30~ 50%, SiO2:18~25%, Fe:20~30%.
5. the ecological treatment system of the reverse osmosis concentrated salt solution of cold rolling according to claim 1, it is characterised in that the modified illiteracy Modified montmorillonite used particle diameter in de- hardcore area is 35~75mm, and gum level is 2~15ml/g, and cation exchange capacity is 0.5~1.0mmol/g, 0.2~0.5g/g of Absorbance ratio-derivative method, 10~35kPa of wet compressive strengths, 0.5~1.0kPa of hot green tensile strength, Expansion volume is 5~25%.
6. the ecological treatment system of the reverse osmosis concentrated salt solution of cold rolling according to claim 1, it is characterised in that
The water distribution dividing plate percent opening is 25%~55%, and eye diameter is 35~60mm;
160~280mm of thickness of the overburden layer;
Fineness of sand in the sand bedding course is not more than 50mm, and clay content is less than 5%.
7. a kind of ecological treatment method of the reverse osmosis concentrated salt solution of cold rolling, it is characterised in that methods described application claim 1-6 appoints The ecological treatment system of the reverse osmosis concentrated salt solution of cold rolling described in one, comprises the following steps:
The reverse osmosis concentrated salt solution of cold rolling enters intake chamber by water inlet pipe, and triangular-notch weir is designed with intake chamber, is matched somebody with somebody by control Tank water level constant adjusts flow of inlet water;The strong brine of intake chamber enters water inlet gravel commutating zone, Ran Houjin by water distribution dividing plate Enter packing area, the strong brine is 3~5d in the packing area residence time;The reverse osmosis concentrated salt solution of cold rolling enters behind packing area Water gravel commutating zone, enters back into effluent trough, by the discharge of water outlet Liquid level outlet pipe.
8. the ecological treatment method of the reverse osmosis concentrated salt solution of cold rolling according to claim 7, it is characterised in that the cold rolling is anti- Permeate water quality of the strong brine after ecological treatment system processing:Electrical conductivity 1810~7800 μ s/cm, COD be 10~ 30mg/L, pH are 6.90~7.80,1~5NTU of turbidity, 0.1~2.3mg/L of ammonia nitrogen, 1.6~8.2mg/L of total nitrogen, total phosphorus 0~ 0.1mg/L, oils are 0~2.67mg/L, and chromium is 0~0.01mg/L, and iron is 0~0.7mg/L, and Zn is 0~0.1mg/L, Ni 0 ~0.1mg/L.
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CN102079579A (en) * 2009-11-26 2011-06-01 宝山钢铁股份有限公司 Artificial wetland with combined fillers and treating process thereof
CN102190376A (en) * 2011-05-05 2011-09-21 西安理工大学 Integrated flow constructed wetland treatment system
CN102584177A (en) * 2012-02-16 2012-07-18 环境保护部华南环境科学研究所 Phosphorous-removing lytag as well as preparation method and application thereof

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Publication number Priority date Publication date Assignee Title
CN102079579A (en) * 2009-11-26 2011-06-01 宝山钢铁股份有限公司 Artificial wetland with combined fillers and treating process thereof
CN102190376A (en) * 2011-05-05 2011-09-21 西安理工大学 Integrated flow constructed wetland treatment system
CN102584177A (en) * 2012-02-16 2012-07-18 环境保护部华南环境科学研究所 Phosphorous-removing lytag as well as preparation method and application thereof

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