CN104058513A - Recycling processing system of cold-state carbon steel oxide scale powder suspension - Google Patents
Recycling processing system of cold-state carbon steel oxide scale powder suspension Download PDFInfo
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- CN104058513A CN104058513A CN201310095145.XA CN201310095145A CN104058513A CN 104058513 A CN104058513 A CN 104058513A CN 201310095145 A CN201310095145 A CN 201310095145A CN 104058513 A CN104058513 A CN 104058513A
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Abstract
The invention relates to a recycling processing system of cold-state carbon steel oxide scale powder suspension. Oxide scale powder suspension flows into a sand liquid separation pool through a liquid inlet; the oxide scale powder suspension in the sand liquid separation pool flows into an oxide scale powder suspension tank through a liquid weir outlet; a liquid outlet of the oxide scale powder suspension tank is connected with a raw water lift pump; an outlet pipe of the raw water lift pump is connected with a suspension pipe mixer; an outlet of the suspension pipe mixer is connected with a flowmeter; an outlet of the flowmeter is connected with a coagulation flocculation reaction pool; an outlet of the coagulation flocculation reaction pool is connected with an inclined plate sedimentation pool; an outlet of the inclined plate sedimentation pool is connected with a filtering water tank; a liquid outlet of a clear water tank is connected with a clear water lift pump; the clear water lift pump is connected with an inlet of a cloth bag filter; an outlet of the cloth bag filter is connected with a sand liquid mixing device. The system of the invention is stable in processing effect, low in production operation cost, simple in operation running, and high in automation degree.
Description
[technical field]
The present invention relates to water-treatment technology field, specifically, is a kind of recycling processing system of cold conditions carbon steel firecoat powder suspension.
[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 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.
In July, 2005, National Development and Reform Committee put into effect " steel industry development policies ", to development of iron & steel industry recycling economy, save energy and resource, walk sustainable development path and proposed higher target and requirement more specifically, in the situation that global resources are in short supply, less energy-consumption, low pollution, low emission become the needs of social development.
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.
Cold conditions carbon steel new_type treatment technology at present, adopts high pressure water compound abrasive, rinses surface of steel plate, removes zone of oxidation, substitutes traditional pickling process, no longer produces with serious pollution cold-rolling pickling wastewater, realizes green production from source.
Cold conditions carbon steel new_type treatment technology still produces novel cold conditions carbon steel firecoat powder suspension.Compared with the cold rolling acid waste water of tradition, in novel cold conditions carbon steel firecoat suspension, the content of suspended substance, PH and heavy metal is all higher than discharging standards, and not treated direct discharge is by serious environment pollution.
Current stage, the not treatment system of relevant novel cold conditions carbon steel firecoat powder suspension reuse.Suspension is mingled with a large amount of suspended particles, heavy metal, impurity, also contain organism and oils simultaneously, if carbon steel firecoat powder suspension is not processed direct discharge, not only cause a large amount of wastes of water resources, and can not meet national steel industry emission standard, environment is caused to serious harm.
Therefore, the cold conditions carbon steel firecoat powder suspension recycling processing system of now necessary development of new, carries out Treatment for Reuse to this strand of waste water, after corresponding art breading, carbon steel firecoat powder suspension water quality reaches the reuse requirement of service water, is again mixed into production technique system with steel sand.
Consult existing patent and documents and materials, also there is no at present the report for Novel cold rolling carbon steel firecoat powder suspension processing aspect.
[summary of the invention]
The object of the invention is to overcome the deficiencies in the prior art, a kind of recycling processing system of cold conditions carbon steel firecoat powder suspension is provided.
The object of the invention is to be achieved through the following technical solutions:
A kind of recycling processing system of cold conditions carbon steel firecoat powder suspension, its bag sand-laden fluid separate tank, firecoat powder suspension water tank, coagulation-flocculation reaction tank, inclined-plate clarifying basin, filtered water tank and sand liquid mixing device, it is characterized in that, firecoat powder suspension flows into sand liquid separate tank by prosopyle, the firecoat powder suspension of sand liquid separate tank flows into firecoat powder suspension water tank through water outlet crest of weir, the water outlet of firecoat powder suspension water tank connects former water lift pump, former water extraction rises pump outlet pipeline and connects suspension line mixer, the outlet connection traffic meter of suspension line mixer, the outlet of under meter connects coagulation-flocculation reaction tank, the outlet of coagulation-flocculation reaction tank connects inclined-plate clarifying basin, and the outlet of inclined-plate clarifying basin connects water tank with strainer, and the water outlet of water tank with strainer connects one-level lift pump, and the outlet conduit of one-level lift pump connects the inlet pipeline of more medium filter, the outlet of more medium filter connects two-stage hoisting pump, two-stage hoisting pump outlet pipeline connects the import of activated charcoal filter, the outlet of activated charcoal filter connects three grades of lift pumps, three grades of lift pumps connect the import of filtered water tank, the water outlet of filtered water tank connects clear water lift pump, clear water lift pump connects the import of cloth envelop collector, and the outlet of cloth envelop collector connects sand liquid mixing device.
Described sand liquid separate tank is made up of water-in, pond body and three parts of abrasive material sand hopper.Import adopts floods prosopyle, and firecoat powder suspension is by inflow pond, equally distributed prosopyle body.Pond is wide ensures that with pond suspension flow velocity slowly and stably flows through deeply, and steel sand is deposited in abrasive material sand hopper, and firecoat powder suspension flows into firecoat powder suspension water tank through water outlet crest of weir; Abrasive material sand hopper is used for gathering the steel sand precipitating at the bottom of being located at the pond in pond, and two sediment outflow pipes connect steel sand conveying belt.
Described steel sand conveying belt is driven by motor, and the steel sand under two sediment outflow pipe rows is transported to sand liquid mixing device.
Described sand liquid separate tank water outlet crest of weir connects firecoat powder suspension water tank inlet, and firecoat powder suspension water outlet of water tank connects former water lift pump, built-in floating ball lever meter, and floating ball lever meter is connected with robot control system(RCS), and follow procedure is determined the switching of former water lift pump.Former water extraction rises pump discharge pipeline and connects suspension line mixer.
The import of described suspension line mixer connects former water extraction and rises pump discharge pipeline, coagulating agent dosing volume pump outlet conduit and flocculation agent dosing volume pump outlet conduit.
The built-in coagulation machinery dosing agitator of described coagulating agent dosing tank and exhaust-valve, the water-in of coagulating agent dosing tank connects process water pipe network, and water outlet connects coagulating agent dosing volume pump, by the dosage of coagulating agent dosing volume pump control dosing.
The built-in coagulation machinery dosing agitator of described flocculation agent dosing tank and exhaust-valve, the water-in of flocculation agent dosing tank connects process water pipe network, and water outlet connects coagulating agent dosing volume pump, by the dosage of flocculation agent dosing volume pump control dosing.
Described coagulating agent is iron trichloride (FeCl
3), ferrous sulfate (FeSO
47H
2o), Tai-Ace S 150 (Al
2(SO)
318H
2o), aluminum chloride (AlCl
36H
2o), polymerize aluminum chloride ([Al (OH)
1.5(SO
4)
0.125cl
1.25]
n) one, dosage is 5～200mg/l.The preferred iron trichloride of coagulating agent, product can be anhydrous solid FeCl
3or hydration FeCl
36H
2o, containing 60%FeCl
3; Iron trichloride produces ferric hydroxide colloid in water, and catch precipitating action by electrical neutralization, adsorption bridging, net and form larger alumen ustum, and alumen ustum free settling; Iron trichloride still has better effects in the time of low-temperature and low turbidity, and the optimum range of pH value is 2～10; Anhydrous solid iron trichloride (FeCl
3) dosage be 50mg/l or hydration FeCl
36H
2the dosage of O is 84mg/l.
Described suspension line mixer exports connection traffic meter, is controlled the actual flow of suspension by under meter, and under meter outlet connects coagulation-flocculation reaction tank.
Built-in pair of blade electric mixer of described coagulation-flocculation reaction tank, in coagulation-flocculation reaction tank, in the short period of time, the particle of firecoat powder suspension mutually collides, assembles under certain hydraulics, forms larger cotton-shaped particle.The outlet of coagulation-flocculation reaction tank connects inclined-plate clarifying basin.
In described inclined-plate clarifying basin, have swash plate, inclined-plate clarifying basin utilizes shallow pool principle, and firecoat powder suspension is in settling tank in the residence time, and the particulate matter removal efficiencies in suspension is high.Particulate matter under precipitation in swash plate enters the sludge bucket of inclined-plate clarifying basin bottom, and two shore pipes are all with mud valve, and two shore pipe outlets connect sludge sump.
Described sludge sump connects shore pipe pipeline, more medium filter and activated charcoal filter backwash water outlet conduit.The sludge components of firecoat powder suspension is mainly Z 250, the mud main component of backwash water under sludge sump precipitation is ferric oxide and Z 250, therefore the mud of sludge sump can be transported to sintering plant outward, and iron containing sludge and iron ore are mixed and enter sintering system.
Described inclined-plate clarifying basin outlet connects water tank with strainer, the built-in floating ball lever meter of water tank with strainer, and water outlet connects two-stage hoisting pump, and built-in floating ball lever meter is connected with robot control system(RCS), and follow procedure is set and is opened and closed one-level lift pump.
Described more medium filter inlet pipeline connects one-level lift pump outlet conduit, the built-in multimedium filter material layer of more medium filter, and more medium filter outlet connects two-stage hoisting pump.
Described more medium filter, by holding back and settlement action of multimedium filtrate, efficiently removes the superfine powder particle in powder suspension, the particularly fines of 5～30 micron diameters.More medium filter filtrate in the present invention divides three layers, is respectively coarse sand bed course, fine sand layer and anthracite coal measure.Three-layer filter specification is respectively: quartz sand thickness 50～600mm, particle diameter 1.2～6.0mm, nonuniformity coefficient 0.7～0.8; Fine sand thickness of filter bed 800～1500mm, particle diameter 0.45～0.6mm, nonuniformity coefficient 0.7～0.8; Hard coal thickness of filter bed 100～600mm, particle diameter 0.6～1.2mm; Nonuniformity coefficient 0.7～0.8.The preferred quartz sand thickness of this example is 150mm, and nonuniformity coefficient is 0.8; Fine sand thickness of filter bed is 1000mm, nonuniformity coefficient 0.8; Hard coal thickness of filter bed is 300mm, nonuniformity coefficient 0.8.The preferred back flushing rate of expansion of this example is 50%, backwashing period 48 hours.
Described activated charcoal filter import connects two-stage hoisting pump discharge pipeline, the built-in activated-carbon filter bed of material of activated charcoal filter, and activated charcoal filter outlet connects three grades of lift pumps.
Described employing activated charcoal filter, utilizes the adsorption of gac to remove organic pollutant, oils and the residual heavy metal composition in suspension.Activated charcoal filter filter material layer in the present invention divides two-layer, is respectively quartz sand layer and gac filtering layer.Quartz sand layer thickness 100～500mm, particle diameter 1.0～2.0mm, nonuniformity coefficient 0.7～0.8; Activated carbon thickness of filter bed 500～1200mm, nonuniformity coefficient 0.7～0.8.The preferred quartz sand thickness of this example is 100mm, and nonuniformity coefficient is 0.8; Activated-carbon filter layer thickness is 800mm, nonuniformity coefficient 0.8.The preferred back flushing rate of expansion of this example is 70%, and backwashing period is 96 hours.
Described backwash pond entrance connects the industrial network of rivers, and the outlet of filter backwash pond connects more medium filter and charcoal filter by filter backwash pump, and Filter Back Washing water is connected to sludge sump.The supernatant liquor of sludge sump accesses inclined-plate clarifying basin by reflux pump.
Described filtered water tank import connects three grades of lift pumps, the built-in floating ball lever meter of filtered water tank, and water outlet connects clear water lift pump, and built-in floating ball lever meter is connected with robot control system(RCS), follow procedure setting switching clear water lift pump.
Described cloth envelop collector import connects clear water lift pump, and outlet connects sand liquid mixing device.Through the firecoat powder suspension inflow sand with pressure liquid mixing device of cloth envelop collector, and steel sand again mixes and is back to production technique.
Compared with prior art, positively effect of the present invention is:
The present invention has proposed complete cold conditions carbon steel firecoat powder suspension treatment technology scheme first, system has solved the problem of firecoat powder suspension discharge beyond standards contaminate environment, after the technical program is processed, firecoat powder suspension reaches standards for industrial water usage, can be again and steel sand mixing reuse and production system.
Technical scheme of the present invention has not only been avoided the new water of a large amount of uses, and whole system do not discharge waste liquid, recycle waste liquid, has reached " zero " liquid discharge.
Technical scheme of the present invention has not only reused steel sand abrasive material, and the iron content solid waste producing in treating processes can, in sintering process production utilization together with iron ore, have been stopped solid waste pollution phenomenon.
Adopt cold conditions carbon steel firecoat powder suspension liquid treating system of the present invention, treatment effect is stable, and production run cost is low, and operation operation is easy, and level of automation is high.
Therefore the invention belongs to iron and steel environmental protection production technique.
Steel industry one is directly subordinate to waste water consumption and discharge rich and influential family, and energy-saving and emission-reduction are developing directions.Patent of the present invention has proposed the systems technology scheme of cold conditions carbon steel firecoat powder suspension processing first, has both reduced the consumption of new water, recycle firecoat powder suspension waste liquid, simultaneously also recycle steel sand abrasive material, reduced production run cost.Therefore the present invention has economy and environmental protection double effects, has good social benefit and environmental benefit.
[brief description of the drawings]
Fig. 1 is the structural representation of the treatment system of a kind of cold conditions carbon steel firecoat powder suspension of the present invention.
Mark in figure: the 1st, sand liquid separate tank, the 2nd, water outlet crest of weir, the 3rd, sediment outflow pipe, the 4th, sediment outflow pipe, the 5th, steel sand conveying belt, the 6th, sand liquid mixing device, the 7th, firecoat powder suspension water tank, the 8th, floating ball lever meter, the 9th, former water lift pump, the 10th, suspension line mixer, the 11st, coagulating agent dosing tank, the 12nd, coagulation machinery dosing agitator, the 13rd, coagulating agent dosing volume pump, the 14th, flocculation agent dosing tank, the 15th, flocculation dosing agitator, the 16th, flocculation agent dosing volume pump, the 17th, under meter, the 18th, coagulation-flocculation reaction tank, the 19th, two blade electric mixers, the 20th, inclined-plate clarifying basin, the 21st, swash plate 22 shore pipes, the 23rd, shore pipe 3, the 24th, spoil disposal pond, the 25th, reflux pump, the 26th, water tank with strainer, the 27th, liquidometer, the 28th, one-level lift pump, the 29th, more medium filter, the 30th, multimedium filter material layer, the 31st, two-stage hoisting pump, the 32nd, activated charcoal filter, the 33rd, the activated-carbon filter bed of material, the 34th, backwash water tank, the 35th, backwashing pump, 36 is three grades of lift pumps, the 37th, filtered water tank, the 38th, filtered water tank liquidometer, the 39th, clear water lift pump, 40 cloth envelop collectors.
[embodiment]
The embodiment of the recycling processing system of a kind of cold conditions carbon steel of the present invention firecoat powder suspension is below provided.
Embodiment 1
Refer to accompanying drawing 1, the present invention is a kind of cold conditions carbon steel firecoat powder suspension recycling processing system, and it comprises sand liquid separate tank 1, water outlet crest of weir 2, sediment outflow pipe 3, sediment outflow pipe 4, steel sand conveying belt 5, sand liquid mixing device 6, firecoat powder suspension water tank 7, floating ball lever meter 8, former water lift pump 9, suspension line mixer 10, coagulating agent dosing tank 11, coagulation machinery dosing agitator 12, coagulating agent dosing volume pump 13, flocculation agent dosing tank 14, flocculation dosing agitator 15, flocculation agent dosing volume pump 16, under meter 17, coagulation-flocculation reaction tank 18, two blade electric mixers 19, inclined-plate clarifying basin 20, swash plate 21, shore pipe 22, shore pipe 23, spoil disposal pond 24, lift pump 25, water tank with strainer 26, liquidometer 27, one-level lift pump 28, more medium filter 29, multimedium filter material layer 30, two-stage hoisting pump 31, activated charcoal filter 32, the activated-carbon filter bed of material 33, backwash water tank 34, backwashing pump 35, three grades of lift pumps 36, filtered water tank 37, filtered water tank liquidometer 38, clear water lift pump 39, cloth envelop collector 40.
Sand liquid separate tank 1 is made up of water-in, pond body and three parts of abrasive material sand hopper.Pond body plane is rectangle, imports and exports the two ends that are located at respectively pond, and the long-width ratio in pond is 5.Import adopts floods prosopyle, and firecoat powder suspension is by inflow pond, equally distributed prosopyle body.Pond is wide ensures that with pond suspension flow velocity slowly and stably flows through deeply, and steel sand is deposited in abrasive material sand hopper, and firecoat powder suspension flows into firecoat powder suspension water tank 7 through water outlet crest of weir 2.Abrasive material sand hopper is used for gathering the steel sand precipitating at the bottom of being located at the pond in pond, and sediment outflow pipe 3 and sediment outflow pipe 4 are by robot control system(RCS) timing sediment outflow.
Steel sand conveying belt 5 is driven by motor, and the steel sand under sediment outflow pipe 3 and sediment outflow pipe 4 rows is transported to sand liquid mixing device 6 through steel sand conveying belt 5.
Firecoat powder suspension water tank 7 water-ins connect water outlet crest of weir 2, and water outlet connects former water lift pump 9, built-in floating ball lever meter 8, and floating ball lever meter 8 is connected with robot control system(RCS), and follow procedure is determined the switching of former water lift pump 9.Former water lift pump 9 outlet conduits connect suspension line mixer 10.
10 imports of suspension line mixer connect former water lift pump 9 outlet conduits, coagulating agent dosing volume pump 13 outlet conduits and flocculation agent dosing volume pump 16 outlet conduits.
The built-in coagulation machinery dosing agitator 12 of coagulating agent dosing tank 11 and exhaust-valve, the water-in of coagulating agent dosing tank 11 connects process water pipe network, and water outlet connects coagulating agent dosing volume pump 13, is controlled the dosage of dosing by coagulating agent dosing volume pump 13.
The built-in coagulation machinery dosing agitator 15 of flocculation agent dosing tank 14 and exhaust-valve, the water-in of flocculation agent dosing tank 14 connects process water pipe network, and water outlet connects coagulating agent dosing volume pump 16, is controlled the dosage of dosing by flocculation agent dosing volume pump 16.
Suspension line mixer 10 rate of discharge meters 17, are controlled the actual flow of suspension by under meter 17, under meter 17 outlets connect coagulation-flocculation reaction tanks 18.
18 built-in pairs of blade electric mixers 19 of coagulation-flocculation reaction tank, in coagulation-flocculation reaction tank 18, in the short period of time, the particle of firecoat powder suspension mutually collides, assembles under certain hydraulics, forms larger cotton-shaped particle.18 outlets of coagulation-flocculation reaction tank connect inclined-plate clarifying basin 20.
In inclined-plate clarifying basin 20, have swash plate 21, inclined-plate clarifying basin 20 utilizes shallow pool principle, and firecoat powder suspension is in settling tank in the residence time, and the particulate matter removal efficiencies in suspension is high.Particulate matter under the precipitation of swash plate 21 enters the sludge bucket of inclined-plate clarifying basin 20 bottoms, and shore pipe 22 and shore pipe 23 be all with mud valve, robot control system(RCS) time opening mud valve, and shore pipe 22 is connected sludge sump 24 with shore pipe 23.
The built-in exhaust-valve of sludge sump 24, the sludge components of firecoat powder suspension is mainly Z 250, and this mud can be transported to sintering plant outward, and mud and iron ore are mixed and enter sintering system.
Inclined-plate clarifying basin 20 outlets connect water tank with strainer 26, the built-in floating ball lever meter 27 of water tank with strainer 26, and water outlet connects one-level lift pump 28, and built-in floating ball lever meter 27 is connected with robot control system(RCS), follow procedure setting switching one-level lift pump 28.
More medium filter 29 inlet pipelines connect one-level lift pump 28 outlet conduits, the built-in multimedium filter material layer 30 of more medium filter 29, and more medium filter 29 outlets connect two-stage hoisting pump 31.
Activated charcoal filter 32 imports connect two-stage hoisting pump 31 outlet conduits, the built-in activated-carbon filter bed of material 33 of activated charcoal filter 32, and activated charcoal filter 32 outlets connect three grades of lift pumps 36.
Backwash pond 34 entrances connect the industrial network of rivers, and the outlet of filter backwash pond connects more medium filter 29 and charcoal filter 32 by filter backwash pump, and Filter Back Washing water is connected to sludge sump 24.The supernatant liquor of sludge sump 24 accesses inclined-plate clarifying basin 20 by lift pump 25.
Filtered water tank 37 imports connect three grades of lift pumps 36, the built-in floating ball lever meter 38 of filtered water tank 37, and water outlet connects clear water lift pump 39, and built-in floating ball lever meter 38 is connected with robot control system(RCS), and follow procedure is set the switching of determining clear water lift pump 39.
Cloth envelop collector 40 imports connect clear water lift pump 39, are exported to sand liquid mixing device 6.
In the present invention, adopt sand liquid separate tank, utilize gravity separation principle that steel sand is separated with firecoat powder suspension, this method is simple to operate, and without additionaling power and energy consumption, practical separating effect is obvious.Steel sand is in the precipitation of sand liquid separate tank bottom.Sand liquid separate tank plane is rectangle, imports and exports the two ends that are located at respectively pond, and the long-width ratio in pond is 5.Import adopts floods prosopyle, and steel sand and firecoat powder suspension mix by inflow pond, equally distributed prosopyle body.Wide and pond, pond ensures that suspension flow velocity slowly and stably flows through deeply, and steel sand is by action of gravity precipitation, through sediment outflow pipe and belt conveyance to sand liquid mixing device at sand liquid separate tank.Steel sand is 1: 2～1: 10 with the ratio of pending firecoat powder suspension volume, and the firecoat suspension residence time is 2min～10min.Preferably the firecoat suspension residence time is 6min in the present embodiment.
The present invention adopts suspension medicament mixing tank can make the coagulating agent of firecoat suspension, interpolation and flocculation agent rapidly and efficiently mix by suspension medicament mixing tank, do not needing in outer power situation, firecoat powder suspension is produced shunting, is intersected and mix and oppositely three effects of eddy flow by agent mixer, the coagulating agent and the flocculation agent that add are diffused in whole suspension rapidly, equably, reach the object of moment mixing.Mixing time is 0.1min～2min.Described suspension medicament mixing tank is static agent mixer, eddy current type agent mixer, the one of nozzle-type agent mixer.Preferred static agent mixer in preferred agents mixing tank in the present embodiment.Each pipe joint road hybrid element of static agent mixer is made up of the elliptical piece of 4 1/4 and 2 web plates.21.5 degree that adopt by calculating and test preferred elliptical piece and central axis angle.Such design not only can make the suitable decline of head loss but also can ensure mixing efficiency.Preferably, determine that firecoat suspension is 1m/s at the agent mixer mixed solution flow velocity of this caliber, head loss is 0.36m, and GT value is 2800, velocity gradient g value 900s
-1.
The coagulating agent that the present invention adopts is iron trichloride (FeCl
3), ferrous sulfate (FeSO
47H
2o), Tai-Ace S 150 (Al
2(SO)
318H
2o), aluminum chloride (AlCl
36H
2o), polymerize aluminum chloride ([Al (OH)
1.5(SO
4)
0.125cl
1.25]
n) one, dosage is 5～200mg/l.The preferred iron trichloride of coagulating agent in the present embodiment, product can be anhydrous solid FeCl
3or hydration FeCl
36H
2o, containing 60%FeCl
3.Iron trichloride produces ferric hydroxide colloid in water, and catch precipitating action by electrical neutralization, adsorption bridging, net and form larger alumen ustum, and alumen ustum free settling.Iron trichloride still has better effects in the time of low-temperature and low turbidity, and the optimum range of pH value is 2～10.Preferred anhydrous solid iron trichloride (FeCl in the present embodiment
3) dosage be 50mg/l or hydration FeCl
36H
2the dosage of O is 84mg/l.Polyacrylamide (PAM) flocculation agent that the present invention adopts is anionic, the one in positively charged ion and non-ionic polyacrylamide, and Molecular Weight for Polyacrylamide can be 200～2,200 ten thousand.Dosage is 0.5mg/l～3mg/l.Mixing time is 0.5～3min.Flocculation agent preferred anionic type polyacrylamide in the present embodiment, molecular weight is 200～5,000,000, dosage is 0.5mg/l.
In the present invention, adopt coagulation-flocculation pond, in agent mixer, coagulating agent and flocculation agent diffuse into rapidly firecoat suspension uniformly, firecoat suspension enters in coagulation-flocculation reaction tank, in short period of time inner reaction device, in suspension, particle mutually collides, assembles under certain hydraulics, forms larger cotton-shaped particle.Coagulation-flocculation reactor can be the one of dividing plate, flap, machinery, grizzly bar (grid), perforation eddy flow, corrugated plate etc.Preferably two blade motor tool agitators in the present embodiment.The general coagulation-flocculation time is 5min～15min.In the present embodiment, preferably the coagulation-flocculation time is 8min.
In the present embodiment, firecoat powder suspension forms larger cotton-shaped particle at coagulation basin, then enters tube settler precipitation.Tube settler utilizes shallow pool principle, and suspension is in settling tank in the residence time, and the particulate matter removal efficiencies in suspension is high.Heavy metal in firecoat powder suspension and macrobead suspended substance are effectively removed in inclined plate tank.Inclined-plate clarifying basin in the present embodiment, preferred design parameter is tube settler load: (removing inclined tube district invalid) 15/ (3.3-1.1) * 2.2=3.10 cubic meter/square metre time.Swash plate caliber is got 35 millimeters; 1.0 meters of plagioclases; Inclination angle 60 is spent.1.0 meters of clear water zone protection height, 1.5 meters of water distributing area, bottom height.
The present invention adopts more medium filter, by holding back and settlement action of multimedium filtrate, efficiently removes the superfine powder particle in powder suspension, the particularly fines of 5～30 micron diameters.More medium filter filtrate in the present invention divides three layers, is respectively coarse sand bed course, fine sand layer and anthracite coal measure.Three-layer filter specification is respectively: quartz sand thickness 50～600mm, particle diameter 1.2～6.0mm, nonuniformity coefficient 0.7～0.8; Fine sand thickness of filter bed 800～1500mm, particle diameter 0.45～0.6mm, nonuniformity coefficient 0.7～0.8; Hard coal thickness of filter bed 100～600mm, particle diameter 0.6～1.2mm; Nonuniformity coefficient 0.7～0.8.The preferred quartz sand thickness of this example is 150mm, and nonuniformity coefficient is 0.8; Fine sand thickness of filter bed is 1000mm, nonuniformity coefficient 0.8; Hard coal thickness of filter bed is 300mm, nonuniformity coefficient 0.8.The preferred back flushing rate of expansion of this example is 50%, backwashing period 48 hours.
The present invention adopts activated charcoal filter, utilizes the adsorption of gac to remove organic pollutant, oils and the residual heavy metal composition in suspension.Activated charcoal filter filter material layer in the present invention divides two-layer, is respectively quartz sand layer and gac filtering layer.Quartz sand layer thickness 100～500mm, particle diameter 1.0～2.0mm, nonuniformity coefficient 0.7～0.8; Activated carbon thickness of filter bed 500～1200mm, nonuniformity coefficient 0.7～0.8.The preferred quartz sand thickness of this example is 100mm, and nonuniformity coefficient is 0.8; Activated-carbon filter layer thickness is 800mm, nonuniformity coefficient 0.8.The preferred back flushing rate of expansion of this example is 70%, and backwashing period is 96 hours.
In the present invention, adopt cloth envelop collector, effectively ensure that firecoat powder suspension clear liquid enters the water quality of sand liquid mixer.Cloth envelop collector is rational in infrastructure, and filtration area is large, changes filter bag convenient and swift, and running cost is low.Cloth envelop collector material in the present invention and the selection of cloth bag, strainer material is mainly carbon steel, 304 stainless steels and 316 stainless one; The material of cloth bag is the one of vinyon, polyolefin plastics, acrylic plastering, tetrafluoroethylene; The filtering accuracy of cloth bag is 0.2～2500 micron.This example preferred filters material is carbon steel, and the material of cloth bag is acrylic plastering, and the filtering accuracy of cloth bag is 1～10 micron.
Adopt the treatment system of cold conditions carbon steel firecoat powder suspension of the present invention, the data before and after powder suspension is processed see table:
| Project | Water inlet suspension waste liquid index | Go out aqeous suspension index |
| PH | 5～12 | 6～9 |
| Suspended substance | 100～4000mg/l | ＜3mg/l |
| Turbidity | 50～1000NTU | ＜5NTU |
| COD | 10～50mg/l | ＜3mg/l |
| TOC | 5～20mg/l | ＜1mg/l |
| Oil | 0.3～10mg/l | ＜0.1mg/l |
| Iron ion | 1～50mg/l | ＜0.02mg/l |
| Aluminum ion | 1～15mg/l | ＜0.05mg/l |
| Chromium ion | 0.5～5mg/l | ＜0.02mg/l |
Note: the suspension that goes out the fingering of aqeous suspension index and enter sand liquid mixing device
In sum, the treatment system of cold conditions carbon steel firecoat powder suspension of the present invention has realized the recycle of suspension waste liquid and the recycling of steel sand abrasive material.Technique one-time investment of the present invention is low; Liquid waste disposal effect stability; Production run cost is low; Level of automation is high, 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.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, without departing from the inventive concept of the premise; can also make some improvements and modifications, these improvements and modifications also should be considered within the scope of protection of the present invention.
Claims (10)
1. the recycling processing system of a cold conditions carbon steel firecoat powder suspension, its bag sand-laden fluid separate tank, firecoat powder suspension water tank, coagulation-flocculation reaction tank, inclined-plate clarifying basin, filtered water tank and sand liquid mixing device, it is characterized in that, firecoat powder suspension flows into sand liquid separate tank by prosopyle, the firecoat powder suspension of sand liquid separate tank flows into firecoat powder suspension water tank through water outlet crest of weir, the water outlet of firecoat powder suspension water tank connects former water lift pump, former water extraction rises pump outlet pipeline and connects suspension line mixer, the outlet connection traffic meter of suspension line mixer, the outlet of under meter connects coagulation-flocculation reaction tank, the outlet of coagulation-flocculation reaction tank connects inclined-plate clarifying basin, and the outlet of inclined-plate clarifying basin connects water tank with strainer, and the water outlet of water tank with strainer connects one-level lift pump, and the outlet conduit of one-level lift pump connects the inlet pipeline of more medium filter, the outlet of more medium filter connects two-stage hoisting pump, two-stage hoisting pump outlet pipeline connects the import of activated charcoal filter, the outlet of activated charcoal filter connects three grades of lift pumps, three grades of lift pumps connect the import of filtered water tank, the water outlet of filtered water tank connects clear water lift pump, clear water lift pump connects the import of cloth envelop collector, and the outlet of cloth envelop collector connects sand liquid mixing device.
2. the recycling processing system of a kind of cold conditions carbon steel firecoat powder suspension as claimed in claim 1, is characterized in that, described sand liquid separate tank is made up of water-in, pond body and three parts of abrasive material sand hopper; Import adopts floods prosopyle, and firecoat powder suspension is by inflow pond, equally distributed prosopyle body; Abrasive material sand hopper is used for gathering the steel sand precipitating at the bottom of being located at the pond in pond, and two sediment outflow pipes connect steel sand conveying belt; Steel sand conveying belt is driven by motor, and the steel sand under two sediment outflow pipe rows is transported to sand liquid mixing device.
3. the recycling processing system of a kind of cold conditions carbon steel firecoat powder suspension as claimed in claim 1, it is characterized in that, the built-in coagulation machinery dosing agitator of described coagulating agent dosing tank and exhaust-valve, the water-in of coagulating agent dosing tank connects process water pipe network, water outlet connects coagulating agent dosing volume pump, by the dosage of coagulating agent dosing volume pump control dosing.
4. the recycling processing system of a kind of cold conditions carbon steel firecoat powder suspension as claimed in claim 1, it is characterized in that, the built-in coagulation machinery dosing agitator of described flocculation agent dosing tank and exhaust-valve, the water-in of flocculation agent dosing tank connects process water pipe network, water outlet connects coagulating agent dosing volume pump, by the dosage of flocculation agent dosing volume pump control dosing.
5. the recycling processing system of a kind of cold conditions carbon steel firecoat powder suspension as claimed in claim 4, is characterized in that, described coagulating agent is iron trichloride (FeCl
3), ferrous sulfate (FeSO
47H
2o), Tai-Ace S 150 (Al
2(SO)
318H
2o), aluminum chloride (AlCl36H
2o), polymerize aluminum chloride ([Al (OH)
1.5(SO
4)
0.125cl
1.25]
n) one, dosage is 5～200mg/l.
6. the recycling processing system of a kind of cold conditions carbon steel firecoat powder suspension as claimed in claim 1, is characterized in that there is swash plate in described inclined-plate clarifying basin, and two shore pipes are all with mud valve, and two shore pipe outlets connect sludge sump.
7. the recycling processing system of a kind of cold conditions carbon steel firecoat powder suspension as claimed in claim 1, is characterized in that, described sludge sump connects shore pipe pipeline, more medium filter and activated charcoal filter backwash water outlet conduit.
8. the recycling processing system of a kind of cold conditions carbon steel firecoat powder suspension as claimed in claim 1, it is characterized in that, described more medium filter inlet pipeline connects one-level lift pump outlet conduit, the built-in multimedium filter material layer of more medium filter, and more medium filter outlet connects two-stage hoisting pump.
9. the recycling processing system of a kind of cold conditions carbon steel firecoat powder suspension as claimed in claim 8, is characterized in that, described more medium filter is divided into three layers, is respectively coarse sand bed course, fine sand layer and anthracite coal measure; Three-layer filter specification is respectively: quartz sand thickness 50～600mm, particle diameter 1.2～6.0mm, nonuniformity coefficient 0.7～0.8; Fine sand thickness of filter bed 800～1500mm, particle diameter 0.45～0.6mm, nonuniformity coefficient 0.7～0.8; Hard coal thickness of filter bed 100～600mm, particle diameter 0.6～1.2mm; Nonuniformity coefficient 0.7～0.8.
10. the recycling processing system of a kind of cold conditions carbon steel firecoat powder suspension as claimed in claim 1, it is characterized in that, described activated charcoal filter import connects two-stage hoisting pump discharge pipeline, the built-in activated-carbon filter bed of material of activated charcoal filter, and activated charcoal filter outlet connects three grades of lift pumps;
Described activated charcoal filter divides two-layer, is respectively quartz sand layer and gac filtering layer; Quartz sand layer thickness 100～500mm, particle diameter 1.0～2.0mm, nonuniformity coefficient 0.7～0.8; Activated carbon thickness of filter bed 500～1200mm, nonuniformity coefficient 0.7～0.8.
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| CN201310095145.XA CN104058513B (en) | 2013-03-22 | 2013-03-22 | Recycling processing system of cold-state carbon steel oxide scale powder suspension |
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|---|---|---|---|---|
| CN109179611A (en) * | 2018-10-24 | 2019-01-11 | 中冶赛迪技术研究中心有限公司 | Suspension rapid sedimentation method and system for abrasive material mixing jetting de-scaling |
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|---|---|---|---|---|
| CN101891354A (en) * | 2010-07-29 | 2010-11-24 | 中冶南方工程技术有限公司 | Process for treating cold rolling wastewater through ozone reaction and activated carbon filtration |
| CN202297312U (en) * | 2011-10-28 | 2012-07-04 | 鞍钢集团工程技术有限公司 | Cold rolling waste water treatment system |
| CN202729922U (en) * | 2012-07-21 | 2013-02-13 | 靖江市大通标准件厂 | Acid-washing material waste water treatment and recovery device |
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2013
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101891354A (en) * | 2010-07-29 | 2010-11-24 | 中冶南方工程技术有限公司 | Process for treating cold rolling wastewater through ozone reaction and activated carbon filtration |
| CN202297312U (en) * | 2011-10-28 | 2012-07-04 | 鞍钢集团工程技术有限公司 | Cold rolling waste water treatment system |
| CN202729922U (en) * | 2012-07-21 | 2013-02-13 | 靖江市大通标准件厂 | Acid-washing material waste water treatment and recovery device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109179611A (en) * | 2018-10-24 | 2019-01-11 | 中冶赛迪技术研究中心有限公司 | Suspension rapid sedimentation method and system for abrasive material mixing jetting de-scaling |
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