CN109179611A - Suspension rapid sedimentation method and system for abrasive material mixing jetting de-scaling - Google Patents
Suspension rapid sedimentation method and system for abrasive material mixing jetting de-scaling Download PDFInfo
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- CN109179611A CN109179611A CN201811242467.1A CN201811242467A CN109179611A CN 109179611 A CN109179611 A CN 109179611A CN 201811242467 A CN201811242467 A CN 201811242467A CN 109179611 A CN109179611 A CN 109179611A
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- tank
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- water
- abrasive material
- flocculation
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- 239000000725 suspension Substances 0.000 title claims abstract description 65
- 239000003082 abrasive agent Substances 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000002156 mixing Methods 0.000 title claims abstract description 26
- 238000004062 sedimentation Methods 0.000 title claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 88
- 238000005345 coagulation Methods 0.000 claims abstract description 49
- 230000015271 coagulation Effects 0.000 claims abstract description 49
- 238000005189 flocculation Methods 0.000 claims abstract description 44
- 230000016615 flocculation Effects 0.000 claims abstract description 44
- 239000007788 liquid Substances 0.000 claims abstract description 42
- 239000004576 sand Substances 0.000 claims abstract description 41
- 238000001556 precipitation Methods 0.000 claims abstract description 36
- 238000006243 chemical reaction Methods 0.000 claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 19
- 239000010959 steel Substances 0.000 claims abstract description 19
- 230000001376 precipitating effect Effects 0.000 claims abstract description 15
- 239000000843 powder Substances 0.000 claims abstract description 9
- 229910052751 metal Inorganic materials 0.000 claims description 18
- 239000002184 metal Substances 0.000 claims description 18
- 239000000701 coagulant Substances 0.000 claims description 15
- 238000012545 processing Methods 0.000 claims description 12
- 239000006228 supernatant Substances 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 6
- 230000001112 coagulating effect Effects 0.000 claims description 5
- 238000010992 reflux Methods 0.000 claims description 5
- 239000010802 sludge Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 229920002472 Starch Polymers 0.000 claims description 4
- 235000019698 starch Nutrition 0.000 claims description 4
- 239000008107 starch Substances 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 125000002091 cationic group Chemical group 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000011010 flushing procedure Methods 0.000 claims description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 2
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 2
- 239000000460 chlorine Substances 0.000 claims description 2
- 229910052801 chlorine Inorganic materials 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims description 2
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 2
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 claims description 2
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims description 2
- 229920002401 polyacrylamide Polymers 0.000 claims description 2
- 238000006116 polymerization reaction Methods 0.000 claims 2
- 229920006320 anionic starch Polymers 0.000 claims 1
- 235000003891 ferrous sulphate Nutrition 0.000 claims 1
- 239000011790 ferrous sulphate Substances 0.000 claims 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 18
- 239000002351 wastewater Substances 0.000 description 10
- 229910052742 iron Inorganic materials 0.000 description 9
- 239000002253 acid Substances 0.000 description 7
- 238000005554 pickling Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 238000005303 weighing Methods 0.000 description 4
- 238000005097 cold rolling Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
Abstract
The present invention provides a kind of suspension rapid sedimentation method and system for abrasive material mixing jetting de-scaling, which includes sand liquid separate tank, for settling steel sand abrasive material；The first stage precipitation tank being connected to the sand liquid separate tank, for precipitating bulky grain abrasive material, the fine-powder suspension in the sand liquid separate tank flows into the first stage precipitation tank；The suspension water tank being connected to the first stage precipitation tank；The coagulation reaction tank being connected to the suspension water tank；The flocculation tank being connected to the coagulation reaction tank；The second-level settling pond being connected to the flocculation tank；And the clear water reserviors being connected to the second-level settling pond.Highly concentrated subtle suspension sedimentation system of the invention has the advantages that treatment effect is stable, operation operation is simple, operating cost is low etc., while reducing production run cost, realizes Zero discharge, have good Social benefit and economic benefit.
Description
Technical field
The present invention relates to water-treatment technology fields, fast more particularly to a kind of suspension for abrasive material mixing jetting de-scaling
Fast intermediate processing and system.
Background technique
Hot-strip in cooling procedure in air oxygen and water used contact generation chemical reaction will lead to
Belt steel surface, which is formed, has certain thickness iron oxide cortex, is commonly called as squama.Hot-strip is when carrying out cold rolling, due to iron scale
Presence, will lead to steel surface occur pit, point, iron scale and impurity indentation etc. product defects, seriously affect steel
Surface quality and processing performance, and subsequent roll for cold rolling is damaged.To guarantee cold-reduced sheet surface quality and processing performance, preventing
Only rolls damage, removal iron scale (de-scaling) become very important process before cold rolling and coating.
Pickling is the descaling process generallyd use both at home and abroad, and pickling is chemically reacted using acid solution with iron scale,
All oxides are removed from metal surface.However, acid cleaning process has the disadvantage in that acid solution can generate corrosion to equipment, because
This is more demanding to equipment anticorrosion；In acid cleaning process, the volatilization of acid solution can damage operator's body；Containing acid waste liquid
Processing cost is higher, and due to the increasingly strict emission limit of environmental protection administration, the discharge of waste liquid also becomes a problem；Pickling removes
Squama effect is uneven, overpickling easily occurs, owes the problems such as pickling, causes product quality defect etc..For this purpose, finding new technique of scale removal
Substituting pickling becomes the research emphasis of countries in the world.
Currently, the research of the de-scaling of abrasive material mixing jetting (i.e. the novel de-scaling of STD) technology and trial are more.The novel de-scaling of STD
Technology is a kind of wet type ball blast technique of scale removal, using the mortar that steel sand and water mix as de-scaling medium, is beaten using machinery
The mode hit is removed the iron scale of metal surface, is generated during de-scaling without any harmful substance, have environmental protection,
Efficiently, working environment is friendly, product surface is bright and clean uniformly, can reduce original surface defect, the advantages that roughness is adjustable, has wide
Wealthy application prospect.
But there are still following disadvantages for the novel technique of scale removal of STD: water consumption is big, and compound abrasive need to expend a large amount of water；Steel sand mill
Expect that consumption is big；Though de-scaling waste liquid is free of acid solution, contain high concentration iron scale powder and steel sand, waste water suspension concentration
Height is unsatisfactory for steel industry discharge and reuse standard.
Summary of the invention
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide one kind removes for abrasive material mixing jetting
The suspension rapid sedimentation method and system of squama contain high concentration iron scale powder for solving de-scaling waste water in the prior art
And steel sand, waste water suspension concentration is high, the problems such as being unsatisfactory for steel industry discharge and reuse standard.
In order to achieve the above objects and other related objects, first aspect present invention provides one kind and removes for abrasive material mixing jetting
The suspension rapid sedimentation method of squama, comprising:
The separation of sand liquid is carried out to the fine-powder suspension that descaling device generates, resulting suspension carries out level-one precipitating,
Part supernatant enters coagulation, flocculation treatment after precipitating, and after two-stage precipitation, resulting treatment fluid is clear for metal sheet surface
Wash processing.
In some embodiments of the invention, the supernatant of 20% (v/v)~30% (v/v) enters coagulation after level-one precipitating
Step.
In some embodiments of the invention, the partial size of abrasive material is 0.2~300 μm in the fine-powder suspension.
In some embodiments of the invention, after level-one precipitating, when resulting another part supernatant is separated with sand liquid
Resulting abrasive material mixing, is back to surface dephosphorization apparatus, handles for metal sheet surface.
In some embodiments of the invention, when coagulating treatment, the additional amount of coagulant is 100~500mg/L.I.e. every liter
100~500mg coagulant is added in liquid.Preferably 300~500mg/L, coagulant is excessive or the very few coagulation that will lead to is heavy
The decline of shallow lake effect.
In some embodiments of the invention, in During Coagulation Process, control velocity gradient g value is greater than 40s-1, preferably
40~80s-1。
In some embodiments of the invention, coagulation mixing time≤10min, preferably 5~10min is controlled.
In some embodiments of the invention, it is sub- to be selected from polyaluminium sulfate, bodied ferric sulfate, polyaluminum sulfate for the coagulant
At least one of iron, poly-ferric chloride, aluminium polychloride.
In some embodiments of the invention, when flocculation treatment, the additional amount of flocculant is 5~50mg/L.That is every liter of liquid
5~50mg flocculant is added in body.Preferably 30~50mg/L.
In some embodiments of the invention, during flocculation treatment, control velocity gradient g value is 20~50s-1。
In some embodiments of the invention, during flocculation treatment, the control flocculation stirring time is 3~8min.
In some embodiments of the invention, the flocculant is selected from high molecular weight polyacrylamide, cationic starch, yin
At least one of ionic starch.
In some embodiments of the invention, the hydraulic detention time of level-one precipitating is 1~3min.
In some embodiments of the invention, the hydraulic detention time of two-stage precipitation is 3~6min.
In some embodiments of the invention, after the separation of sand liquid, resulting liquid enters suspension water tank, when hydraulic retention
Between be 2-5min.
In some embodiments of the invention, the pretreatment of suspension water tank, coagulating treatment, flocculation treatment, two-stage precipitation produce
Raw sludge, which is concentrated, enters collecting pit.
Second aspect of the present invention provides a kind of suspension rapid precipitation system for abrasive material mixing jetting de-scaling, including sand
Liquid separate tank, for settling steel sand abrasive material；
The first stage precipitation tank being connected to the sand liquid separate tank, for precipitating bulky grain abrasive material, in the sand liquid separate tank
Fine-powder suspension flow into the first stage precipitation tank；
The coagulation reaction tank being connected to the first stage precipitation tank；
The flocculation tank being connected to the coagulation reaction tank；
The second-level settling pond being connected to the flocculation tank；With
The clear water reserviors being connected to the second-level settling pond.
In some embodiments of the invention, the first stage precipitation tank is reversely connected to the sand liquid separation by pipeline
Pond, the abrasive material in the first stage precipitation tank are back to the sand liquid separate tank by the pipeline.
In some embodiments of the invention, the first stage precipitation tank is inclined-plate clarifying basin or inclined-tube sedimentation tank, is used for back
Bulky grain abrasive material is received, abrasive material is delivered to sand liquid separate tank through screw pump by first stage precipitation tank bottom.
In some embodiments of the invention, suspension water is equipped between the first stage precipitation tank and the coagulation reaction tank
Case, for precipitating feed liquid again, overflow water outlet in top enters coagulation reaction tank, and lower part water outlet is by pipeline and kinetic pump, with sand
After the abrasive material mixing flowed out in liquid separate tank, it is back to surface dephosphorization apparatus, for carrying out surface dephosphorization processing to metal plate.
In some embodiments of the invention, the sand liquid separate tank, suspension water tank are connected to surface by mixing valve
Dephosphorization apparatus.After the water in abrasive material, suspension water tank in sand liquid separate tank enters mixing valve mixing, filled into surface dephosphorization
It sets, for carrying out surface dephosphorization processing to metal plate.
In some embodiments of the invention, it is provided with reflux water pump below the suspension water tank, by suspension water tank
Middle a part of water pressurization is promoted at mixing valve, is mixed for metal sheet surface de-scaling with abrasive material, another part water passes through suspension
The water outlet of liquid water tank overflow mouth.
In some embodiments of the invention, the suspension water tank recirculation water must be forced into 1.15Mpa or more.
In some embodiments of the invention, the suspension water tank, coagulation reaction tank, flocculation tank, two-stage precipitation
Pond, clear water reserviors pass through pipeline and are connected to collecting pit for collecting sludge.
In some embodiments of the invention, the coagulation reaction tank is equipped with agitating device and chemicals dosing plant.
In some embodiments of the invention, the flocculation tank is equipped with agitating device and chemicals dosing plant.
In some embodiments of the invention, coagulation/flocculation reaction system includes by coagulation dosing case, coagulant dosing meter
Measure pump, the coagulating system of coagulation reaction tank composition and by flocculation dosing tank, flocculant dosing metering pump, flocculation tank
The flocculation reaction system of composition.
In some embodiments of the invention, coagulation machinery dosing blender and exhaust-valve, coagulation built in coagulation dosing case
Agent dosing tank water outlet connects coagulant dosing metering pump, by the dosage of coagulant dosing metering pump control dosing.
In some embodiments of the invention, the second-level settling pond is inclined-plate clarifying basin or inclined-tube sedimentation tank.
In some embodiments of the invention, the water outlet of the clear water reserviors is connected to surface de-scaling metal by heat exchanger
Plate flushing pipe.Clear water reserviors water outlet is rinsed after heat exchanger is cooling for surface de-scaling metal plate.
In some embodiments of the invention, the heat exchanger is plate heat exchanger or pipe heat exchanger.
As described above, a kind of suspension rapid sedimentation method and system for abrasive material mixing jetting de-scaling of the invention,
It has the advantages that highly concentrated subtle suspension sedimentation system of the invention, there is treatment effect stabilization, operation operation letter
It is single, operating cost is low etc., and advantages realize Zero discharge while reducing production run cost, with good society
Benefit and economic benefit.
Detailed description of the invention
Fig. 1 is shown as the suspension rapid precipitation system schematic of the embodiment of the present invention 1.
Label declaration
1- sand liquid separate tank
2- first stage precipitation tank
3- screw pump
4- suspension water tank
5- reflux water pump
6- mixing valve
7- coagulation reaction tank
8- flocculation tank
9- coagulation stirrer
10- coagulant measures dosing pump
11- coagulation dosing case
12- coagulation dosing blender
13- flocculation stirring machine
14- flocculant measures dosing pump
15- flocculation dosing tank
16- flocculation dosing blender
17- second-level settling pond
18- clear water reserviors
19- heat exchanger
20- collecting pit
21- crosses liquid channel
The surface 22- dephosphorization apparatus
23- waits for dephosphorization metal plate
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from
Various modifications or alterations are carried out under spirit of the invention.
The present invention develops a kind of highly concentrated subtle suspension recycling processing system of STD novel descaling device, to de-scaling waste water into
Row processing, makes waste water suspension concentration meet reuse requirement, and the steel sand abrasive material in Recycling of waste liquid, reenters STD system, with
The consumption of water and steel sand is reduced, waste water recycling is realized, meets the requirement of iron and steel enterprise's zero-emission.
Embodiment 1
As shown in Figure 1, the present embodiment provides a kind of highly concentrated subtle suspension rapid precipitations for STD novel descaling device
System, including sand liquid separate tank 1, first stage precipitation tank 2, screw pump 3, suspension water tank 4, reflux water pump 5, mixing valve 6, coagulation are anti-
Answer pond 7, flocculation tank 8, coagulation stirrer 9, coagulant metering dosing pump 10, coagulation dosing case 11, coagulation dosing blender
12, flocculation stirring machine 13, flocculant metering dosing pump 14, flocculation dosing tank 15, flocculation dosing blender 16, second-level settling pond
17, clear water reserviors 18, heat exchanger 19, collecting pit 20.Passed through the connection of liquid channel 21 between coagulation reaction tank 7, flocculation tank 8.
It is sprayed to the fine-powder suspension generated to 23 surface of dephosphorization metal plate through surface descaling device 22 and collects and enter
Sand liquid separate tank 1, part steel sand abrasive material fall to bottom of pond, and fine-powder suspension flows into first stage precipitation tank 2 through water outlet crest of weir, this
Embodiment is preferably inclined-plate clarifying basin, and the hydraulic detention time of level-one precipitating is 1~3min, and bulky grain abrasive material falls to sedimentation basin
Bottom is transmitted back to sand liquid separate tank 1 through screw pump 3, and the water outlet of inclined-plate clarifying basin connects suspension water tank 4, in suspension water tank 4
70% (v/v)~80% (v/v) supernatant is forced into 1.15Mpa or more through reflux water pump 5, is promoted to mixing valve 6, with sand liquid point
It is mixed from steel sand abrasive material in pond 1, is used for metal sheet surface de-scaling, another part overflow is discharged (20% (v/ in suspension water tank 4
V)~30% supernatant of (v/v)) enter coagulation/flocculation reaction system.
Coagulation/flocculation reaction system includes by coagulation dosing case 11, coagulant dosing metering pump 10,7 groups of coagulation reaction tank
At coagulating system and the flocculation that is made of flocculation dosing tank 15, flocculant dosing metering pump 14, flocculation tank 8 it is anti-
Answer system.Coagulation dosing blender 12 and exhaust-valve built in coagulation dosing case 11,11 water outlet of coagulation dosing case connect coagulant
Dosing pump 10 is measured, the dosage of dosing is controlled by coagulant metering dosing pump 10, the coagulant of the present embodiment preferably polymerize chlorine
Change aluminium, 100~500mg/L of dosage, dosage carries out dynamic adjustment according to water outlet status, and control velocity gradient g value is greater than
40s-1, preferably 40~80s-1, control coagulation mixing time is 5~10min；The built-in flocculation dosing stirring of the dosing tank 15 that flocculates
Device 16 and exhaust-valve, 15 water outlet of flocculant dosing tank connect flocculant and measure dosing pump 14, measure dosing pump 14 by flocculant
The dosage of dosing is controlled, the flocculant of the present embodiment is preferably cationic starch, degree of substitution 0.6,5~50mg/L of dosage,
Dosage carries out dynamic adjustment according to water outlet status, and control velocity gradient g value is 20~50s-1, the control flocculation stirring time is 3
~8min.
Coagulation/flocculation reaction system water outlet flow to second-level settling pond 17, the preferred inclined-tube sedimentation tank of the present embodiment, two-stage precipitation
Hydraulic detention time be 3~6min, waste water enters clear water reserviors 18 after inclined-tube sedimentation tank again precipitation process, in clear water reserviors 18
Ss suspended solid≤50mg/L of water, temperature≤80 DEG C, output water temperature is 35 DEG C~45 DEG C after the heat exchange of heat exchanger 19, is used for metal
The flushing of plate, the present embodiment preferred heat exchanger are plate heat exchanger.
The sludge system that suspension water tank 4, coagulation reaction tank 7, flocculation tank 8, second-level settling pond 17, clear water reserviors 18 generate
One collects in collecting pit 20 and transports outward processing.
The detection method of ss suspended solid is carried out by GB11901-89 " water quality-suspended matter measurement-gravimetric method ", specific steps
It is as follows:
1) filter membrane that aperture is 0.45 μm is placed in weighing bottle, is dried at 103 DEG C~105 DEG C, claimed after cooling constant weight
Weight；
2) 100mL water sample is taken, is filtered using the filter membrane of constant weight using vacuum pump, distills water washing with 10mL every time later
Residue washs 3 times altogether；
3) filter paper is removed, is put into former weighing bottle, is dried at 103 DEG C~105 DEG C, is weighed after cooling constant weight.
It calculates: ss suspended solid concentration=[(filter membrane+weighing bottle after filtering)-(filtering front filter+weighing bottle)] ÷ water sample body
Product.
Primary sample is carried out to water outlet every 2 hours, measurement result maintains 30~50mg/L.
According to long-term detection, the TSP concentration of clear water pool inner water is not more than 50mg/L, and temperature is not higher than 80 DEG C.
In conclusion the present invention by highly concentrated subtle suspension sedimentation system, so that STD de-scaling waste water is handled, is hanged
The part water outlet of supernatant liquid water tank, which mix with the steel sand abrasive material recycled through first stage precipitation tank, reenters STD descaling system time
With reducing the new water consumption of descaling process and steel sand abrasive material consumption, reduce STD system operation cost, handled through system
Water outlet ss suspended solid≤50mg/L, fully recovering rinses for surface de-scaling metal plate in STD system.It is provided by the invention
Water treatment system operation operation is simple, and treatment effect is stablized, and waste water, to STD system, realizes waste water zero through processing fully recovering
Discharge, while the production run cost of STD system is effectively reduced, there is good Social benefit and economic benefit.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should be covered by the claims of the present invention.
Claims (10)
1. a kind of suspension rapid sedimentation method for abrasive material mixing jetting de-scaling characterized by comprising by descaling device
The fine-powder suspension sand liquid of generation separates, and resulting suspension carries out level-one precipitating, and obtained part supernatant enters mixed
Solidifying, flocculation treatment, after two-stage precipitation, resulting treatment fluid is used for metal sheet surface cleaning treatment.
2. suspension rapid sedimentation method according to claim 1, it is characterised in that: level-one precipitating after 20% (v/v)~
The supernatant of 30% (v/v) enters coagulation step；
And/or after level-one precipitating, resulting abrasive material mixing when separating with sand liquid of resulting another part supernatant is back to
Surface dephosphorization apparatus is handled for metal sheet surface.
3. suspension rapid sedimentation method according to claim 1, it is characterised in that: when coagulating treatment, coagulant adds
Entering amount is 100~500mg/L；
And/or in During Coagulation Process, control velocity gradient g value is greater than 40s-1；
And/or control coagulation mixing time≤10min, preferably 5~10min；
And/or the coagulant is selected from polyaluminium sulfate, bodied ferric sulfate, polymerization ferrous sulfate, poly-ferric chloride, polymerization chlorine
Change at least one of aluminium.
4. suspension rapid sedimentation method according to claim 1, it is characterised in that: when flocculation treatment, flocculant adds
Entering amount is 5~50mg/L；
And/or during flocculation treatment, control velocity gradient g value is 20~50s-1；
And/or during flocculation treatment, the control flocculation stirring time is 3~8min；
And/or the flocculant is selected from least one of high molecular weight polyacrylamide, cationic starch, anionic starch.
5. suspension rapid sedimentation method according to claim 1, it is characterised in that: the hydraulic detention time of level-one precipitating
For 1~3min；
And/or the hydraulic detention time of two-stage precipitation is 3~6min.
6. suspension rapid sedimentation method according to claim 1, it is characterised in that: after level-one precipitating, resulting liquid
Into suspension water tank, the water outlet of suspension water tank enters back into coagulation step.
7. suspension rapid sedimentation method according to claim 6, it is characterised in that: water of the feed liquid in suspension water tank
The power residence time is 2~5min.
8. suspension rapid sedimentation method according to claim 7, it is characterised in that: the pretreatment of suspension water tank, coagulation
The sludge that processing, flocculation treatment, two-stage precipitation generate, which is concentrated, enters collecting pit.
9. a kind of suspension rapid precipitation system for abrasive material mixing jetting de-scaling, it is characterised in that: including sand liquid separate tank,
For settling steel sand abrasive material；
The first stage precipitation tank being connected to the sand liquid separate tank, it is thin in the sand liquid separate tank for precipitating bulky grain abrasive material
Micropowder suspension flows into the first stage precipitation tank；
The coagulation reaction tank being connected to the first stage precipitation tank；
The flocculation tank being connected to the coagulation reaction tank；
The second-level settling pond being connected to the flocculation tank；With
The clear water reserviors being connected to the second-level settling pond.
10. suspension rapid precipitation system according to claim 9, it is characterised in that: the first stage precipitation tank passes through pipe
Road is reversely connected to the sand liquid separate tank, and the abrasive material in the first stage precipitation tank is back to the sand liquid by the pipeline and separates
Pond；
And/or the first stage precipitation tank is inclined-plate clarifying basin or inclined-tube sedimentation tank；
And/or suspension water tank is equipped between the first stage precipitation tank and the coagulation reaction tank；
And/or the sand liquid separate tank, suspension water tank are connected to surface dephosphorization apparatus by mixing valve；
And/or the suspension water tank is communicated with reflux water pump, and water a part of in suspension water tank is pressurizeed and promotes mixing valve
Place is mixed for metal sheet surface de-scaling with abrasive material, and another part water is discharged by suspension water tank overflow mouth, into coagulation
Reaction tank；
And/or the suspension water tank, coagulation reaction tank, flocculation tank, second-level settling pond, clear water reserviors are connected by pipeline
Pass to the collecting pit for collecting sludge；
And/or the coagulation reaction tank is equipped with agitating device and chemicals dosing plant；
And/or the flocculation tank is equipped with agitating device and chemicals dosing plant；
And/or the second-level settling pond is inclined-plate clarifying basin or inclined-tube sedimentation tank；
And/or the water outlet of the clear water reserviors is connected to surface de-scaling metal plate flushing pipe by heat exchanger；
And/or the heat exchanger is plate heat exchanger or pipe heat exchanger.
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| CN201811242467.1A CN109179611A (en) | 2018-10-24 | 2018-10-24 | Suspension rapid sedimentation method and system for abrasive material mixing jetting de-scaling |
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| CN201811242467.1A CN109179611A (en) | 2018-10-24 | 2018-10-24 | Suspension rapid sedimentation method and system for abrasive material mixing jetting de-scaling |
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| DE2352733A1 (en) * | 1973-06-27 | 1975-01-09 | Ishikawajima Harima Heavy Ind | PROCESS AND EQUIPMENT FOR THE SURFACE TREATMENT OF METALLIC OR NON-METALLIC PARTS, IN PARTICULAR OF SHEET METAL |
| CN102756003A (en) * | 2011-04-28 | 2012-10-31 | 宝山钢铁股份有限公司 | Continuous jet descaling system for cold-state metal part surface |
| CN102848324A (en) * | 2011-06-29 | 2013-01-02 | 宝山钢铁股份有限公司 | System and method for circulating abrasive material for post-mixed jet flow |
| CN104058513A (en) * | 2013-03-22 | 2014-09-24 | 宝山钢铁股份有限公司 | Recycling processing system of cold-state carbon steel oxide scale powder suspension |
| CN105215855A (en) * | 2015-08-21 | 2016-01-06 | 太原科技大学 | Utilize abrasive slurries to throw sheet metal strip, spray the device of de-scaling |
| CN206677795U (en) * | 2017-03-14 | 2017-11-28 | 江苏鑫华能环保工程股份有限公司 | Continous way de-scaling mortar is prepared, separating circulating device |
| CN209081509U (en) * | 2018-10-24 | 2019-07-09 | 中冶赛迪技术研究中心有限公司 | Suspension rapid precipitation system for abrasive material mixing jetting de-scaling |
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2018
- 2018-10-24 CN CN201811242467.1A patent/CN109179611A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2352733A1 (en) * | 1973-06-27 | 1975-01-09 | Ishikawajima Harima Heavy Ind | PROCESS AND EQUIPMENT FOR THE SURFACE TREATMENT OF METALLIC OR NON-METALLIC PARTS, IN PARTICULAR OF SHEET METAL |
| CN102756003A (en) * | 2011-04-28 | 2012-10-31 | 宝山钢铁股份有限公司 | Continuous jet descaling system for cold-state metal part surface |
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| CN104058513A (en) * | 2013-03-22 | 2014-09-24 | 宝山钢铁股份有限公司 | Recycling processing system of cold-state carbon steel oxide scale powder suspension |
| CN105215855A (en) * | 2015-08-21 | 2016-01-06 | 太原科技大学 | Utilize abrasive slurries to throw sheet metal strip, spray the device of de-scaling |
| CN206677795U (en) * | 2017-03-14 | 2017-11-28 | 江苏鑫华能环保工程股份有限公司 | Continous way de-scaling mortar is prepared, separating circulating device |
| CN209081509U (en) * | 2018-10-24 | 2019-07-09 | 中冶赛迪技术研究中心有限公司 | Suspension rapid precipitation system for abrasive material mixing jetting de-scaling |
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