CN104150645A - Hot rolling waste water reuse treatment system and method - Google Patents
Hot rolling waste water reuse treatment system and method Download PDFInfo
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- CN104150645A CN104150645A CN201410441235.4A CN201410441235A CN104150645A CN 104150645 A CN104150645 A CN 104150645A CN 201410441235 A CN201410441235 A CN 201410441235A CN 104150645 A CN104150645 A CN 104150645A
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Abstract
The invention provides a hot rolling waste water reuse treatment system and method. The treatment system comprises an iron sheet particle precipitating basin which is provided with a hot rolling waste water inlet and is used for guiding the hot rolling waste water in through a pipeline, the iron sheet particle precipitating basin is communicated to a filling reactor through a lifting pump, the filling reactor is communicated to a reuse water tank through a water outlet pump, the filling reactor is a sealed cylinder, a water inlet, a water distributor, a lower part coal gangue ceramisite filling area, an iron cake filling area, an upper part coal gangue ceramisite filling area and a clarifying area are respectively arranged on the filling reactor from bottom to top, and a filling baffle plate is arranged between the clarifying area and the upper coal gangue ceramisite filling area. The system disclosed by the invention is used for processing the hot rolling waste water through precipitation, filtration, absorption, redox and the like, so that the hot rolling waste water can meet the reuse standards to be reused in the forepart technology of the hot rolling, the cyclic utilization of water resources is realized, and meanwhile, the effects of energy conservation and emission reduction are achieved.
Description
Technical field
The present invention relates to water-treatment technology field, be specifically related to a kind for the treatment of system and method for hot-rolling wastewater reuse.
Background technology
As the basic industry of China, Iron And Steel Industry from reform and opening-up since, fast development, in recent years always in the high speed development stage, steel annual production amplification is at 15%-22%.Iron And Steel Industry is the industry of a high energy consumption, high resource, high pollution, and its water resources consumption is huge, accounts for 14% of national industrial water consumption.The unit of Iron and Steel Enterprises in China consumes the water yield still higher than the level of external advanced iron and steel enterprise, a nearly step reduces iron and steel enterprise's ton steel and consumes the new water yield, improve the cyclic utilization rate of iron and steel enterprise's water, comprehensive treating process and the reuse of strengthening iron and steel enterprise's waste water are that Iron and Steel Enterprises in China realizes one of key of Sustainable development.
Country just progressively improves the emission standard of waste water and relevant " energy-saving and emission-reduction " policy at present, rise on October 1st, 2012 and promulgated that new < < Iron And Steel Industry pollution discharge standard > > (GB13456-2012) required from 1 day January in 2015, the standard C OD that existing enterprise carries out is 40mg/L, total nitrogen is 20mg/L, and all kinds of heavy metals emissions are all had to strict requirement.
Hot-rolling wastewater refer to Steel Plant's hot rolling workshop when pricking roller steel ingot be rolled into various steel (steel plate, rod iron, rail etc.) need use water cooling roll, flushing iron scale and the waste water that produces.In hot-rolling wastewater, contain the more suspended substances such as iron scale, and the lubricated wet goods leaking in production process, and the heavy metals such as the copper that contains different concns with the difference of producing rolling shapes, zinc, water temperature is 15～40 ℃, 1 ton of steel plate of every rolling is approximately discharged waste water 30-40m
3.
Waste water recycling is the ultimate aim of wastewater treatment, is the enforcement means that industry energy conservation reduces discharging.Hot-rolling wastewater can be produced by processing rear reuse, has accomplished that the recycle of water resources has reached again the effect of energy-saving and emission-reduction.
Summary of the invention
The shortcoming of prior art in view of the above, the object of the invention is to the water quality and quantity situation according to hot-rolling wastewater, a kind of economy, efficient hot-rolling wastewater recycling processing system and treatment process are provided, effectively improve steel mill's water resources reclamation rate, for the water technology that more the hot rolling steel mill of energy-conserving and environment-protective provides power of domestic construction from now on supports and instructs.
For achieving the above object and other relevant objects, the invention provides a kind of hot-rolling wastewater recycling processing system, comprise the iron sheet solids precipitation pond that pipeline imports hot-rolling wastewater of passing through that is provided with hot-rolling wastewater entrance, described iron sheet solids precipitation pond is communicated to packed column reactor by lift pump, described packed column reactor is communicated to reuse water tank by going out water pump, described packed column reactor is containment cylinder, described packed column reactor is respectively equipped with water-in from bottom to top, water distributor, lower coal spoil ceramics filling district, scum packing area, coal gangue haydite packing area, top, settling section, settling section is one section of region for standing clarified wastewater, between described settling section and coal gangue haydite packing area, top, be provided with filler dividing plate, the top of settling section is provided with wash-down water entrance, wash-down water entrance top is provided with water port, between lower coal spoil ceramics filling district and scum packing area, be provided with wash-down water outlet.
Through iron sheet solids precipitation pond, in hot-rolling wastewater, iron scale clearance reaches 99.9%, and iron scale is lower than 5mg/L.
Packed column reactor major function is to remove COD, the suspended substance in hot-rolling wastewater and take total iron as main heavy metal.
The major function in lower coal spoil ceramics filling district is to remove suspended substance and the heavy metal of hot-rolling wastewater.The major function of scum packing area is the COD removing in hot-rolling wastewater.The function of coal gangue haydite packing area, top is the loss of further removing the heavy metal in hot-rolling wastewater and preventing scum filler.
As optimal way, coal gangue haydite filler in coal gangue haydite packing area, upper and lower part in described packed column reactor adopts coal gangue and the preparation of clay high temperature, preparation haydite composition by mass percentage: coal gangue is 80～93%, and clay is 7～20%; Wherein the composition of coal gangue comprises by mass percentage: SiO
2: 50～62%; Al
2o
3: 19.5～23%; Fe
2o
3: 4～9%; CaO:1～5%; MgO:0.2～2%; K
2o:1～3%; Na
2o:0.5～2%; Loss on ignition: 3～12%, the particle diameter of coal gangue is 2～30mm, uniformity coefficient is 85%～98%; The composition of clay comprises by mass percentage: SiO
2: 60～75%; Al
2o
3: 8～15%; Fe
2o
3: 2～11%; CaO:1～6%; MgO:0.5～2%; Loss on ignition: 3～7%.
Clay mainly plays binding agent.
As optimal way, the preparation method of the coal gangue haydite filler in coal gangue haydite packing area comprises the steps:
(1), broken and screening: adopt crusher to cross screen sizing, it is 2～10mm coal gangue that sieve is got particle diameter;
(2), cryodrying: particle diameter is 2～10mm coal gangue in dry 2～4 hours of the loft drier of 110 ℃;
(3), middle temperature roast: dried coal gangue is 140-160 ℃ of first preheating 20-40min in chamber type electric resistance furnace, then temperature is warmed up to 550-700 ℃, temperature rise rate is r=150～200 ℃/h, and constant temperature 20-40min in the time of 550-700 ℃ makes coal gangue haydite so inner that fully to expand;
(4), high temperature sintering: be warmed up to 950-1000 ℃, temperature rise rate is r=25～55 ℃/h, constant temperature 10-20min, is then warming up to 1300 ℃, and temperature rise rate is r=20～50 ℃/h, during intensification respectively at 1050 ℃, 1100 ℃, 1150 ℃, 1200 ℃, 1250 ℃ of constant temperature roast 8～15min, at 1300 ℃ of constant temperature 30min;
(5), naturally cooling: naturally cooling, the cooling rear hardening of fusant, the cooling coal gangue haydite that makes.
As optimal way, 1/3rd of the volume Ge Wei total filler district of described lower coal spoil ceramics filling district, scum packing area, coal gangue haydite packing area, top.
As optimal way, iron sheet solids precipitation pond long-width ratio is 1.4～1.7, and the hot-rolling wastewater residence time is therein 23～51min, and mean flow rate is 1～10m/s, and surface load is 0.4～0.8m3/ (m2 ﹒ h).
As optimal way, described iron sheet solids precipitation pond long-width ratio is 1.5.
As optimal way, the aperture of described water distributor is 45mm.
As optimal way, made coal gangue haydite particle diameter is 2mm～10mm, and epidermis is coarse hard, inside has many micropores, is grey black, and void content is 40～65%, ultimate compression strength >=1.5MPa.
As optimal way, described inside, scum packing area is blast furnace scum filler, described blast furnace scum filler is that scum mixes by the weight ratio of 1:0.03～0.3 with carbon granule, scum filler is the blast furnace scum of 2.0～10.0mm, scum first soaks under 90 degree with 15% alkali lye and within 20 minutes, removes surperficial oil stain, with 10% hydrochloric acid soln, soak removal oxide on surface again, with tap water, rinse well again, described carbon granule is a kind of of coke, gac, cinder, flue dust, hard coal etc. and combination thereof, and the particle diameter of carbon granule is 0.3～6.0mm.
Filler in scum packing area has the ability of redoxomorphism and electrochemistry absorption.Owing to there is obvious redox-potential in iron and carbon granule, scum and carbon granule have formed many small galvanic cells, and at iron carbon surface, electric current flows in thousands of tiny microbatterys, can follow hot-rolling wastewater various ingredients generation redox reaction, remove the organism in waste water.
Hot-rolling wastewater is 30～120min at hot-rolling wastewater in the residence time of above-mentioned whole packing area.Back flushing mouth is set in packed column reactor, and back flushing frequency is 15 days/time.Hot-rolling wastewater is discharged from water outlet through packed column reactor settling section and filler dividing plate more afterwards.
The present invention also provides a kind of method of hot-rolling wastewater Treatment for Reuse, first hot-rolling wastewater passes through iron sheet solids precipitation pond after being collected by inlet channel, remove 99.9% iron scale, then waste water enter packed column reactor, by water distributor successively through the lower coal spoil ceramics filling district in packing area, scum packing area and coal gangue haydite packing area, top, remove respectively suspended substance and the heavy metal of hot-rolling wastewater, COD, through settling section and filler dividing plate, from water port, discharge again, treated waste water reaches reuse standard, by going out water pump, enter reuse water tank, be reused for hot rolling FEOL.
As mentioned above, a kind of hot-rolling wastewater recycling processing system of the present invention and treatment process, to hot-rolling wastewater precipitate, the processing such as filtration, absorption, redox, make hot-rolling wastewater reach reuse standard, can be reused for hot rolling FEOL, realize the recycle of water resources, reach the effect that technical ability reduces discharging simultaneously.
Accompanying drawing explanation
Fig. 1 is hot-rolling wastewater processing technological flow figure.
Fig. 2 is packed column reactor structure iron.
Piece mark explanation
1 is water-in
2 is water distributor
3 is lower coal spoil ceramics filling district
4 is wash-down water outlet
5 is scum packing area
6 is coal gangue haydite packing area, top
7 is settling section
8 is filler dividing plate
9 is wash-down water entrance
10 is water port
Embodiment
Below, by specific specific examples explanation embodiments of the present invention, those skilled in the art can understand other advantages of the present invention and effect easily by the disclosed content of this specification sheets.The present invention can also be implemented or be applied by other different embodiment, and the every details in this specification sheets also can be based on different viewpoints and application, carries out various modifications or change not deviating under spirit of the present invention.
Embodiment 1
As shown in the figure, the present embodiment provides a kind of hot-rolling wastewater recycling processing system, comprise the iron sheet solids precipitation pond that pipeline imports hot-rolling wastewater of passing through that is provided with hot-rolling wastewater entrance, described iron sheet solids precipitation pond is communicated to packed column reactor by lift pump, described packed column reactor is communicated to reuse water tank by going out water pump, described packed column reactor is containment cylinder, described packed column reactor is respectively equipped with water-in 1 from bottom to top, water distributor 2, lower coal spoil ceramics filling district 3, scum packing area 5, coal gangue haydite packing area, top 6, settling section 7, between described settling section 7 and coal gangue haydite packing area, top 6, be provided with filler dividing plate 8, the top of settling section 7 is provided with wash-down water entrance 9, wash-down water entrance top is provided with water port 10, between lower coal spoil ceramics filling district 3 and scum packing area 5, be provided with wash-down water outlet 4.
Through iron sheet solids precipitation pond, in hot-rolling wastewater, iron scale clearance reaches 99.9%, and iron scale is lower than 5mg/L.
Packed column reactor major function is to remove COD, the suspended substance in hot-rolling wastewater and take total iron as main heavy metal.
The major function in lower coal spoil ceramics filling district is to remove suspended substance and the heavy metal of hot-rolling wastewater.The major function of scum packing area is the COD removing in hot-rolling wastewater.The function of coal gangue haydite packing area, top is the loss of further removing the heavy metal in hot-rolling wastewater and preventing scum filler.
Coal gangue haydite filler in coal gangue haydite packing area, upper and lower part in described packed column reactor adopts coal gangue and the preparation of clay high temperature, the composition of the haydite of preparation by mass percentage: coal gangue is 93%, and clay is 7%; Wherein the composition of coal gangue comprises by mass percentage: SiO
2: 62%; Al
2o
3: 19.5%; Fe
2o
3: 4%; CaO:1%; MgO:2%; K
2o:3%; Na
2o:2%, all the other are impurity, loss on ignition: 12%, the particle diameter of coal gangue is 2～30mm, uniformity coefficient is 98%; The composition of clay comprises by mass percentage: SiO
2: 75%; Al
2o
3: 8%; Fe
2o
3: 2%; CaO:1%; MgO:2%; All the other are impurity, loss on ignition: 3%.
Clay mainly plays binding agent.
The preparation method of the coal gangue haydite filler in coal gangue haydite packing area comprises the steps:
(1), broken and screening: adopt crusher to cross screen sizing, it is 2～10mm coal gangue that sieve is got particle diameter;
(2), cryodrying: particle diameter is 2～10mm coal gangue in dry 2 hours of the loft drier of 110 ℃;
(3), middle temperature roast: dried coal gangue is 140 ℃ of first preheating 20min in chamber type electric resistance furnace, and then temperature is warmed up to 550 ℃, and temperature rise rate is r=150 ℃/h, and constant temperature 20min in the time of 550 ℃ makes coal gangue haydite so inner that fully to expand;
(4), high temperature sintering: be warmed up to 950 ℃, temperature rise rate is r=25～55 ℃/h, constant temperature 10min, is then warming up to 1300 ℃, and temperature rise rate is r=20～50 ℃/h, during intensification respectively at 1050 ℃, 1100 ℃, 1150 ℃, 1200 ℃, 1250 ℃ of constant temperature roast 8min, at 1300 ℃ of constant temperature 30min;
(5), naturally cooling: naturally cooling, the cooling rear hardening of fusant, the cooling coal gangue haydite that makes.
/ 3rd of a volume Ge Wei total filler district of described lower coal spoil ceramics filling district, scum packing area, coal gangue haydite packing area, top.
Iron sheet solids precipitation pond long-width ratio is 1.4, and the hot-rolling wastewater residence time is therein 23min, and mean flow rate is 1～10m/s, and surface load is 0.4～0.8m
3/ (m
2﹒ h).
The aperture of described water distributor is 45mm.
Made coal gangue haydite particle diameter is 2mm～10mm, and epidermis is coarse hard, inside has many micropores, is grey black, and void content is 40～65%, ultimate compression strength >=1.5MPa.
Described inside, scum packing area is blast furnace scum filler, described blast furnace scum filler is that scum mixes by the weight ratio of 1:0.03 with carbon granule, scum filler is the blast furnace scum of 2.0～10.0mm, scum first soaks under 90 degree with 15% alkali lye and within 20 minutes, removes surperficial oil stain, with 10% hydrochloric acid soln, soak removal oxide on surface again, with tap water, rinse well again, described carbon granule is a kind of of coke, gac, cinder, flue dust, hard coal etc. and combination thereof, and the particle diameter of carbon granule is 0.3～6.0mm.
Filler in scum packing area has the ability of redoxomorphism and electrochemistry absorption.Owing to there is obvious redox-potential in iron and carbon granule, scum and carbon granule have formed many small galvanic cells, and at iron carbon surface, electric current flows in thousands of tiny microbatterys, can follow hot-rolling wastewater various ingredients generation redox reaction, remove the organism in waste water.
Hot-rolling wastewater is 30min at hot-rolling wastewater in the residence time of above-mentioned whole packing area.Back flushing mouth is set in packed column reactor, and back flushing frequency is 15 days/time.Hot-rolling wastewater is discharged from water outlet through packed column reactor settling section and filler dividing plate more afterwards.
The present embodiment also provides a kind of method of hot-rolling wastewater Treatment for Reuse, first hot-rolling wastewater passes through iron sheet solids precipitation pond after being collected by inlet channel, remove 99.9% iron scale, then waste water enter packed column reactor, by water distributor successively through the lower coal spoil ceramics filling district in packing area, scum packing area and coal gangue haydite packing area, top, remove respectively suspended substance and the heavy metal of hot-rolling wastewater, COD, through settling section and filler dividing plate, from water port, discharge again, treated waste water reaches reuse standard, by going out water pump, enter reuse water tank, be reused for hot rolling FEOL.
The present embodiment is as follows at waste water index contrast table before and after treatment:
| ? | Water quality PH | Iron scale (mg/L) | Suspended substance (mg/L) | COD(mg/L) | Total iron (mg/L) | Total zinc (mg/L) | Total copper (mg/L) |
| Before processing | 7.2 | 4500 | 110 | 47 | 21 | 4.3 | 2.9 |
| After processing | 7.6 | 1.2 | 3.8 | 7 | 1.1 | 0.9 | 0.8 |
As can be seen from the above table: adopt the method for the present embodiment can effectively remove iron scale, suspended substance, COD and all kinds of heavy metal in hot-rolling wastewater, can be back to hot rolling FEOL after treatment, accomplish the recycle of water resources, reached the object of energy-saving and emission-reduction.
Embodiment 2
The present embodiment provides a kind of hot-rolling wastewater recycling processing system, comprise the iron sheet solids precipitation pond that pipeline imports hot-rolling wastewater of passing through that is provided with hot-rolling wastewater entrance, described iron sheet solids precipitation pond is communicated to packed column reactor by lift pump, described packed column reactor is communicated to reuse water tank by going out water pump, described packed column reactor is containment cylinder, described packed column reactor is respectively equipped with water-in 1 from bottom to top, water distributor 2, lower coal spoil ceramics filling district 3, scum packing area 5, coal gangue haydite packing area, top 6, settling section 7, between described settling section 7 and coal gangue haydite packing area, top 6, be provided with filler dividing plate 8, the top of settling section 7 is provided with wash-down water entrance 9, wash-down water entrance top is provided with water port 10, between lower coal spoil ceramics filling district 3 and scum packing area 5, be provided with wash-down water outlet 4.
Through iron sheet solids precipitation pond, in hot-rolling wastewater, iron scale clearance reaches 99.9%, and iron scale is lower than 5mg/L.
Packed column reactor major function is to remove COD, the suspended substance in hot-rolling wastewater and take total iron as main heavy metal.
The major function in lower coal spoil ceramics filling district is to remove suspended substance and the heavy metal of hot-rolling wastewater.The major function of scum packing area is the COD removing in hot-rolling wastewater.The function of coal gangue haydite packing area, top is the loss of further removing the heavy metal in hot-rolling wastewater and preventing scum filler.
Coal gangue haydite filler in coal gangue haydite packing area, upper and lower part in described packed column reactor adopts coal gangue and the preparation of clay high temperature, the composition of the haydite of preparation by mass percentage: coal gangue is 80%, and clay is 20%; Wherein the composition of coal gangue comprises by mass percentage: SiO
2: 50%; Al
2o
3: 23%; Fe
2o
3: 9%; CaO:5%; MgO:0.2%; K
2o:1%; Na
2o:0.5%, all the other are impurity, loss on ignition: 3%, the particle diameter of coal gangue is 2～30mm, uniformity coefficient is 85%%; The composition of clay comprises by mass percentage: SiO
2: 60%; Al
2o
3: 15%; Fe
2o
3: 11%; CaO:6%; MgO:0.5%, all the other are impurity, loss on ignition: 7%.
Clay mainly plays binding agent.
The preparation method of the coal gangue haydite filler in coal gangue haydite packing area comprises the steps:
(1), broken and screening: adopt crusher to cross screen sizing, it is 2～10mm coal gangue that sieve is got particle diameter;
(2), cryodrying: particle diameter is 2～10mm coal gangue in dry 4 hours of the loft drier of 110 ℃;
(3), middle temperature roast: dried coal gangue is 160 ℃ of first preheating 40min in chamber type electric resistance furnace, and then temperature is warmed up to 700 ℃, and temperature rise rate is r=200 ℃/h, and constant temperature 40min in the time of 700 ℃ makes coal gangue haydite so inner that fully to expand;
(4), high temperature sintering: be warmed up to 1000 ℃, temperature rise rate is r=25～55 ℃/h, constant temperature 20min, is then warming up to 1300 ℃, and temperature rise rate is r=20～50 ℃/h, during intensification respectively at 1050 ℃, 1100 ℃, 1150 ℃, 1200 ℃, 1250 ℃ of constant temperature roast 15min, at 1300 ℃ of constant temperature 30min;
(5), naturally cooling: naturally cooling, the cooling rear hardening of fusant, the cooling coal gangue haydite that makes.
/ 3rd of a volume Ge Wei total filler district of described lower coal spoil ceramics filling district, scum packing area, coal gangue haydite packing area, top.
Iron sheet solids precipitation pond long-width ratio is 1.7, and the hot-rolling wastewater residence time is therein 51min, and mean flow rate is 1～10m/s, and surface load is 0.4～0.8m
3/ (m
2﹒ h).
The aperture of described water distributor is 45mm.
Made coal gangue haydite particle diameter is 2mm～10mm, and epidermis is coarse hard, inside has many micropores, is grey black, and void content is 40～65%, ultimate compression strength >=1.5MPa.
Described inside, scum packing area is blast furnace scum filler, described blast furnace scum filler be scum with carbon granule by 1 :～0.3 weight ratio is mixed, scum filler is the blast furnace scum of 2.0～10.0mm, scum first soaks under 90 degree with 15% alkali lye and within 20 minutes, removes surperficial oil stain, with 10% hydrochloric acid soln, soak removal oxide on surface again, with tap water, rinse well again, described carbon granule is a kind of of coke, gac, cinder, flue dust, hard coal etc. and combination thereof, and the particle diameter of carbon granule is 0.3～6.0mm.
Filler in scum packing area has the ability of redoxomorphism and electrochemistry absorption.Owing to there is obvious redox-potential in iron and carbon granule, scum and carbon granule have formed many small galvanic cells, and at iron carbon surface, electric current flows in thousands of tiny microbatterys, can follow hot-rolling wastewater various ingredients generation redox reaction, remove the organism in waste water.
Hot-rolling wastewater is 120min at hot-rolling wastewater in the residence time of above-mentioned whole packing area.Back flushing mouth is set in packed column reactor, and back flushing frequency is 15 days/time.Hot-rolling wastewater is discharged from water outlet through packed column reactor settling section and filler dividing plate more afterwards.
The present embodiment also provides a kind of method of hot-rolling wastewater Treatment for Reuse, first hot-rolling wastewater passes through iron sheet solids precipitation pond after being collected by inlet channel, remove 99.9% iron scale, then waste water enter packed column reactor, by water distributor successively through the lower coal spoil ceramics filling district in packing area, scum packing area and coal gangue haydite packing area, top, remove respectively suspended substance and the heavy metal of hot-rolling wastewater, COD, through settling section and filler dividing plate, from water port, discharge again, treated waste water reaches reuse standard, by going out water pump, enter reuse water tank, be reused for hot rolling FEOL.
The present embodiment is as follows at waste water index contrast table before and after treatment:
| ? | Water quality PH | Iron scale (mg/L) | Suspended substance (mg/L) | COD(mg/L) | Total iron (mg/L) | Total zinc (mg/L) | Total copper (mg/L) |
| Before processing | 7.2 | 4500 | 110 | 47 | 21 | 4.3 | 2.9 |
| After processing | 7.3 | 0.8 | 2.9 | 5 | 0.8 | 0.6 | 0.7 |
As can be seen from the above table: adopt the method for the present embodiment can effectively remove iron scale, suspended substance, COD and all kinds of heavy metal in hot-rolling wastewater, can be back to hot rolling FEOL after treatment, accomplished the recycle of water resources, reach the object of energy-saving and emission-reduction, and the present embodiment is better than embodiment 1.
Embodiment 3
As shown in Figure 1, the present embodiment provides a kind of hot-rolling wastewater recycling processing system, comprise the iron sheet solids precipitation pond that pipeline imports hot-rolling wastewater of passing through that is provided with hot-rolling wastewater entrance, described iron sheet solids precipitation pond is communicated to packed column reactor by lift pump, described packed column reactor is communicated to reuse water tank by going out water pump, described packed column reactor is containment cylinder, described packed column reactor is respectively equipped with water-in 1 from bottom to top, water distributor 2, lower coal spoil ceramics filling district 3, scum packing area 5, coal gangue haydite packing area, top 6, settling section 7, between described settling section 7 and coal gangue haydite packing area, top 6, be provided with filler dividing plate 8, the top of settling section 7 is provided with wash-down water entrance 9, wash-down water entrance top is provided with water port 10, between lower coal spoil ceramics filling district 3 and scum packing area 5, be provided with wash-down water outlet 4.
Through iron sheet solids precipitation pond, in hot-rolling wastewater, iron scale clearance reaches 99.9%, and iron scale is lower than 5mg/L.
Packed column reactor major function is to remove COD, the suspended substance in hot-rolling wastewater and take total iron as main heavy metal.
The major function in lower coal spoil ceramics filling district is to remove suspended substance and the heavy metal of hot-rolling wastewater.The major function of scum packing area is the COD removing in hot-rolling wastewater.The function of coal gangue haydite packing area, top is the loss of further removing the heavy metal in hot-rolling wastewater and preventing scum filler.
Coal gangue haydite filler in coal gangue haydite packing area, upper and lower part in described packed column reactor adopts coal gangue and the preparation of clay high temperature, the composition of the haydite of preparation by mass percentage: coal gangue is 88%, and clay is 12%; Wherein the composition of coal gangue comprises by mass percentage: SiO
2: 57%; Al
2o
3: 21%; Fe
2o
3: 5%; CaO:4%; MgO:1%; K
2o:2%; Na
2o:1.5%; Loss on ignition: 8.7%, the particle diameter of coal gangue is 2～30mm, uniformity coefficient is 92%; The composition of clay comprises by mass percentage: SiO
2: 72%; Al
2o
3: 10%; Fe
2o
3: 9%; CaO:4%; MgO:1%; Loss on ignition: 5%.
Clay mainly plays binding agent.
The preparation method of the coal gangue haydite filler in coal gangue haydite packing area comprises the steps:
(1), broken and screening: adopt crusher to cross screen sizing, it is 2～10mm coal gangue that sieve is got particle diameter;
(2), cryodrying: particle diameter is 2～10mm coal gangue in dry 3 hours of the loft drier of 110 ℃;
(3), middle temperature roast: dried coal gangue is 150 ℃ of first preheating 30min in chamber type electric resistance furnace, and then temperature is warmed up to 600 ℃, and temperature rise rate is r=180 ℃/h, and constant temperature 30min in the time of 600 ℃ makes coal gangue haydite so inner that fully to expand;
(4), high temperature sintering: be warmed up to 1000 ℃, temperature rise rate is r=45 ℃/h, and then constant temperature 15min is warming up to 1300 ℃, temperature rise rate is r=45 ℃/h, during intensification respectively at 1050 ℃, 1100 ℃, 1150 ℃, 1200 ℃, 1250 ℃ of constant temperature roast 10min, at 1300 ℃ of constant temperature 30min;
(5), naturally cooling: naturally cooling, the cooling rear hardening of fusant, the cooling coal gangue haydite that makes.
/ 3rd of a volume Ge Wei total filler district of described lower coal spoil ceramics filling district, scum packing area, coal gangue haydite packing area, top.
Iron sheet solids precipitation pond long-width ratio is 1.5, and the hot-rolling wastewater residence time is therein 46min, and mean flow rate is 7m/s, and surface load is 0.7m
3/ (m
2﹒ h).
The aperture of described water distributor is 45mm.
Made coal gangue haydite particle diameter is 2mm～10mm, and epidermis is coarse hard, inside has many micropores, is grey black, and void content is 40～65%, ultimate compression strength >=1.5MPa.
Described inside, scum packing area is blast furnace scum filler, described blast furnace scum filler is that scum mixes by the weight ratio of 1:0.2 with carbon granule, scum filler is the blast furnace scum of 2.0～10.0mm, scum first soaks under 90 degree with 15% alkali lye and within 20 minutes, removes surperficial oil stain, with 10% hydrochloric acid soln, soak removal oxide on surface again, with tap water, rinse well again, described carbon granule is a kind of of coke, gac, cinder, flue dust, hard coal etc. and combination thereof, and the particle diameter of carbon granule is 0.3～6.0mm.
Filler in scum packing area has the ability of redoxomorphism and electrochemistry absorption.Owing to there is obvious redox-potential in iron and carbon granule, scum and carbon granule have formed many small galvanic cells, and at iron carbon surface, electric current flows in thousands of tiny microbatterys, can follow hot-rolling wastewater various ingredients generation redox reaction, remove the organism in waste water.
Hot-rolling wastewater is 95min at hot-rolling wastewater in the residence time of above-mentioned whole packing area.Back flushing mouth is set in packed column reactor, and back flushing frequency is 15 days/time.Hot-rolling wastewater is discharged from water outlet through packed column reactor settling section and filler dividing plate more afterwards.
The present embodiment also provides a kind of method of hot-rolling wastewater Treatment for Reuse, first hot-rolling wastewater passes through iron sheet solids precipitation pond after being collected by inlet channel, remove 99.9% iron scale, then waste water enter packed column reactor, by water distributor successively through the lower coal spoil ceramics filling district in packing area, scum packing area and coal gangue haydite packing area, top, remove respectively suspended substance and the heavy metal of hot-rolling wastewater, COD, through settling section and filler dividing plate, from water port, discharge again, treated waste water reaches reuse standard, by going out water pump, enter reuse water tank, be reused for hot rolling FEOL.。
The present embodiment is as follows at waste water index contrast table before and after treatment:
| ? | Water quality PH | Iron scale (mg/L) | Suspended substance (mg/L) | COD(mg/L) | Total iron (mg/L) | Total zinc (mg/L) | Total copper (mg/L) |
| Before processing | 7.2 | 4500 | 110 | 47 | 21 | 4.3 | 2.9 |
| After processing | 7.4 | 2.1 | 3.2 | 9 | 1.3 | 0.8 | 1.1 |
As can be seen from the above table: by the method for the present embodiment, can effectively remove iron scale, suspended substance, COD and all kinds of heavy metal in hot-rolling wastewater, can be back to hot rolling FEOL after treatment, accomplish the recycle of water resources, reached the object of energy-saving and emission-reduction.
Comparative example 1
The structure of the hot-rolling wastewater recycling processing system in the present embodiment is identical with the structure in embodiment 3, and difference is that the composition of the coal gangue haydite filler in the coal gangue haydite packing area, upper and lower part in packed column reactor is different.Other technical characterictic is all identical with embodiment 3 in addition.
Coal gangue haydite filler in coal gangue haydite packing area, upper and lower part in described packed column reactor adopts coal gangue and the preparation of clay high temperature, the composition of the haydite of preparation by mass percentage: coal gangue is 65%, and clay is 35%; Wherein the composition of coal gangue comprises by mass percentage: SiO
2: 45%; Al
2o
3: 10%; Fe
2o
3: 15%; CaO:10%; MgO:5%; K
2o:5%; Na
2o:5%; Loss on ignition: 15%, the particle diameter of coal gangue is 2～30mm, uniformity coefficient is 80%; The composition of clay comprises by mass percentage: SiO
2: 55%; Al
2o
3: 10%; Fe
2o
3: 9%; CaO:10%; MgO:3%; Loss on ignition: 9%.
The preparation method of the coal gangue haydite filler in coal gangue haydite packing area is identical with the method in embodiment 3.
The present embodiment is as follows at waste water index contrast table before and after treatment:
| ? | Water quality PH | Iron scale (mg/L) | Suspended substance (mg/L) | COD(mg/L) | Total iron (mg/L) | Total zinc (mg/L) | Total copper (mg/L) |
| Before processing | 7.2 | 4500 | 110 | 47 | 21 | 4.3 | 2.9 |
| After processing | 7.3 | 12.9 | 6.3 | 17 | 5.6 | 1.8 | 0.9 |
As can be seen from the above table: the composition of the coal gangue haydite filler in the coal gangue haydite packing area, upper and lower part in packed column reactor has larger impact to the effect of processing.
Comparative example 2
The hot-rolling wastewater recycling processing system that this comparative example provides is identical with the structure in embodiment 3, identical with in embodiment 3 of coal gangue haydite filler composition in coal gangue haydite packing area, upper and lower part in packed column reactor, difference is preparation method and embodiment 3 differences of the coal gangue haydite filler in coal gangue haydite packing area, and other technical characterictic is all identical with embodiment 3 in addition.
In this comparative example, the preparation method of coal gangue haydite filler comprises the steps:
(1), broken and screening: adopt crusher to cross screen sizing, it is 10～30mm coal gangue that sieve is got particle diameter;
(2), cryodrying: particle diameter is 10～30mm coal gangue in dry 3 hours of the loft drier of 110 ℃;
(3), high temperature sintering: dried coal gangue is warmed up to 1200 ℃ gradually, at 1200 ℃ of constant temperature 30min;
(4), naturally cooling: naturally cooling, the cooling rear hardening of fusant, the cooling coal gangue haydite that makes.
This comparative example is as follows at waste water index contrast table before and after treatment:
| ? | Water quality PH | Iron scale (mg/L) | Suspended substance (mg/L) | COD(mg/L) | Total iron (mg/L) | Total zinc (mg/L) | Total copper (mg/L) |
| Before processing | 7.2 | 4500 | 110 | 47 | 21 | 4.3 | 2.9 |
| After processing | 7.5 | 17.6 | 9.7 | 16 | 8.7 | 1.5 | 1.4 |
Because the expansion of coal gangue haydite inside is insufficient, not good to the treatment effect of waste water as can be seen from the above table, can find out that thus the preparation process of coal gangue haydite filler has considerable influence to the index of wastewater treatment.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all can, under spirit of the present invention and category, modify or change above-described embodiment.Therefore, such as in affiliated technical field, have and conventionally know that the knowledgeable, not departing from all equivalence modifications that complete under disclosed spirit and technological thought or changing, must be contained by claim of the present invention.
Claims (10)
1. a hot-rolling wastewater recycling processing system, it is characterized in that: comprise the iron sheet solids precipitation pond that pipeline imports hot-rolling wastewater of passing through that is provided with hot-rolling wastewater entrance, described iron sheet solids precipitation pond is communicated to packed column reactor by lift pump, described packed column reactor is communicated to reuse water tank by going out water pump, described packed column reactor is containment cylinder, described packed column reactor is respectively equipped with water-in from bottom to top, water distributor, lower coal spoil ceramics filling district, scum packing area, coal gangue haydite packing area, top, settling section, between described settling section and coal gangue haydite packing area, top, be provided with filler dividing plate, the top of settling section is provided with wash-down water entrance, wash-down water entrance top is provided with water port, between lower coal spoil ceramics filling district and scum packing area, be provided with wash-down water outlet.
2. hot-rolling wastewater recycling processing system according to claim 1, it is characterized in that, coal gangue haydite filler in coal gangue haydite packing area, upper and lower part in described packed column reactor adopts coal gangue and the preparation of clay high temperature, preparation haydite composition by mass percentage: coal gangue is 80～93%, and clay is 7～20%; Wherein
The composition of coal gangue comprises by mass percentage: SiO
2: 50～62%; Al
2o
3: 19.5～23%; Fe
2o
3: 4～9%; CaO:1～5%; MgO:0.2～2%; K
2o:1～3%; Na
2o:0.5～2%; Loss on ignition: 3～12%, the particle diameter of coal gangue is 2～30mm, uniformity coefficient is 85%～98%;
The composition of clay comprises by mass percentage: SiO
2: 60～75%; Al
2o
3: 8～15%; Fe
2o
3: 2～11%; CaO:1～6%; MgO:0.5～2%; Loss on ignition: 3～7%.
3. hot-rolling wastewater recycling processing system according to claim 1 and 2, is characterized in that, the preparation method of the coal gangue haydite filler in coal gangue haydite packing area comprises the steps:
(1), broken and screening: adopt crusher to cross screen sizing, it is 2～10mm coal gangue that sieve is got particle diameter;
(2), cryodrying: particle diameter is 2～10mm coal gangue in dry 2～4 hours of the loft drier of 110 ℃;
(3), middle temperature roast: dried coal gangue is 140-160 ℃ of first preheating 20-40min in chamber type electric resistance furnace, then temperature is warmed up to 550-700 ℃, temperature rise rate is r=150～200 ℃/h, and constant temperature 20-40min in the time of 550-700 ℃ makes coal gangue haydite so inner that fully to expand;
(4), high temperature sintering: be warmed up to 950-1000 ℃, temperature rise rate is r=25～55 ℃/h, constant temperature 10-20min, is then warming up to 1300 ℃, and temperature rise rate is r=20～50 ℃/h, during intensification respectively at 1050 ℃, 1100 ℃, 1150 ℃, 1200 ℃, 1250 ℃ of constant temperature roast 8～15min, at 1300 ℃ of constant temperature 30min;
(5), naturally cooling: naturally cooling, the cooling rear hardening of fusant, the cooling coal gangue haydite that makes.
4. hot-rolling wastewater recycling processing system according to claim 1, is characterized in that: 1/3rd of the volume Ge Wei total filler district of described lower coal spoil ceramics filling district, scum packing area, coal gangue haydite packing area, top.
5. hot-rolling wastewater recycling processing system according to claim 1, is characterized in that: iron sheet solids precipitation pond long-width ratio is 1.4～1.7, and the hot-rolling wastewater residence time is therein 23～51min, and mean flow rate is 1～10m/s, and surface load is 0.4～0.8m
3/ (m
2﹒ h).
6. hot-rolling wastewater recycling processing system according to claim 1, is characterized in that: described iron sheet solids precipitation pond long-width ratio is 1.5.
7. hot-rolling wastewater recycling processing system according to claim 1, is characterized in that: the aperture of described water distributor is 45mm.
8. hot-rolling wastewater recycling processing system according to claim 2, is characterized in that, made coal gangue haydite particle diameter is 2mm～10mm, and epidermis is coarse hard, inside has many micropores, is grey black, and void content is 40～65%, ultimate compression strength >=1.5MPa.
9. hot-rolling wastewater recycling processing system according to claim 1, it is characterized in that, described inside, scum packing area is blast furnace scum filler, described blast furnace scum filler is that scum mixes by the weight ratio of 1:0.03～0.3 with carbon granule, scum filler is the blast furnace scum of 2.0～10.0mm, scum first soaks under 90 degree with 15% alkali lye and within 20 minutes, removes surperficial oil stain, with 10% hydrochloric acid soln, soak removal oxide on surface again, with tap water, rinse well again, described carbon granule is coke, gac, cinder, flue dust, a kind of and the combination of hard coal etc., the particle diameter of carbon granule is 0.3～6.0mm.
10. a method of utilizing hot-rolling wastewater recycling processing system described in the claims 1-9 any one to carry out hot-rolling wastewater Treatment for Reuse, it is characterized in that: first hot-rolling wastewater passes through iron sheet solids precipitation pond after being collected by inlet channel, remove 99.9% iron scale, then waste water enter packed column reactor, by water distributor successively through the lower coal spoil ceramics filling district in packing area, scum packing area and coal gangue haydite packing area, top, remove respectively suspended substance and the heavy metal of hot-rolling wastewater, COD, through settling section and filler dividing plate, from water port, discharge again, treated waste water reaches reuse standard, by going out water pump, enter reuse water tank, be reused for hot rolling FEOL.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105233562A (en) * | 2015-11-05 | 2016-01-13 | 中冶东方工程技术有限公司 | Iron sheet dewatering pool |
| CN108395049A (en) * | 2018-03-19 | 2018-08-14 | 四川德胜集团钒钛有限公司 | Sewage disposal system |
| CN115259536A (en) * | 2022-09-09 | 2022-11-01 | 云南曲靖呈钢钢铁（集团）有限公司 | Efficient wastewater treatment system and process for steel rolling production line |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005131481A (en) * | 2003-10-29 | 2005-05-26 | Nippon Steel Corp | Removing agent of organochlorine compound and manufacturing method therefor |
| CN201254508Y (en) * | 2008-06-19 | 2009-06-10 | 中冶南方工程技术有限公司 | Hot rolling sludge rare-earth magnetic disc treatment device |
| CN101456652A (en) * | 2009-01-05 | 2009-06-17 | 北京大学 | Device of depth denitrogen and phosphorus removal composite processing system by micro-power and method thereof |
| CN102765845A (en) * | 2012-06-27 | 2012-11-07 | 中冶南方工程技术有限公司 | Treatment device for hot-rolled stainless steel washing water |
| CN103073147A (en) * | 2013-02-17 | 2013-05-01 | 莱芜钢铁集团有限公司 | Turbid circulating water treatment method and system |
| US20140116940A1 (en) * | 2012-10-25 | 2014-05-01 | The Water Company | Removal of elements from aqueous fluids |
-
2014
- 2014-09-01 CN CN201410441235.4A patent/CN104150645B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005131481A (en) * | 2003-10-29 | 2005-05-26 | Nippon Steel Corp | Removing agent of organochlorine compound and manufacturing method therefor |
| CN201254508Y (en) * | 2008-06-19 | 2009-06-10 | 中冶南方工程技术有限公司 | Hot rolling sludge rare-earth magnetic disc treatment device |
| CN101456652A (en) * | 2009-01-05 | 2009-06-17 | 北京大学 | Device of depth denitrogen and phosphorus removal composite processing system by micro-power and method thereof |
| CN102765845A (en) * | 2012-06-27 | 2012-11-07 | 中冶南方工程技术有限公司 | Treatment device for hot-rolled stainless steel washing water |
| US20140116940A1 (en) * | 2012-10-25 | 2014-05-01 | The Water Company | Removal of elements from aqueous fluids |
| CN103073147A (en) * | 2013-02-17 | 2013-05-01 | 莱芜钢铁集团有限公司 | Turbid circulating water treatment method and system |
Non-Patent Citations (2)
| Title |
|---|
| 林宁: "轧钢厂水处理新工艺介绍", 《钢铁》 * |
| 肖波 等: "改性纤维球处理武钢热轧含油废水中试研究", 《环境科学与技术》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105233562A (en) * | 2015-11-05 | 2016-01-13 | 中冶东方工程技术有限公司 | Iron sheet dewatering pool |
| CN108395049A (en) * | 2018-03-19 | 2018-08-14 | 四川德胜集团钒钛有限公司 | Sewage disposal system |
| CN115259536A (en) * | 2022-09-09 | 2022-11-01 | 云南曲靖呈钢钢铁（集团）有限公司 | Efficient wastewater treatment system and process for steel rolling production line |
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