CN102887597B - Steel rolling alkali wash water filtering and recycling system - Google Patents
Steel rolling alkali wash water filtering and recycling system Download PDFInfo
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- CN102887597B CN102887597B CN201210444928.XA CN201210444928A CN102887597B CN 102887597 B CN102887597 B CN 102887597B CN 201210444928 A CN201210444928 A CN 201210444928A CN 102887597 B CN102887597 B CN 102887597B
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Abstract
The invention discloses a steel rolling alkali wash water filtering and recycling system which adopts oil removing, coarse filtering, fine filtering, concentrating and dewatering and deslagging and is characterized in that a sloping panel oil separating groove of which the upper part is provided with a chain type oil scraping device and the lower part is provided with a slag settling taper hopper is adopted in oil removing; a self-cleaning filter is adopted in coarse filtering for intercepting large-particle impurities to prolong the backwashing period of a microfilter unit; a micropore filtering device is used in fine filtering and is internally provided with a compound micropore filter core; settled slag in the sloping panel oil separating groove, drained sludge in the self-cleaning filter and drained sludge in the microfilter unit are integrally collected to a waste alkali water storage tank for carrying out secondary concentration; and the concentrated waste slag in the waste alkali water storage tank is dewatered by a plate frame filter press or centrifugal dehydrator, and then conveyed outside by a slag car. The steel rolling alkali wash water filtering and recycling system has the advantages of good oil removing effect, high filtering precision, clear filtered liquid, no change of properties, concentration and other physicochemical properties of alkali wash water, full recycling of liquid, dual recycling of solid and liquid, no environmental pollution and energy saving.
Description
Technical field
The present invention relates to a kind of industrial filter and recovering system, particularly a kind of steel rolling alkaline wash filters and recovering system.
Background technology
The techniques such as the cleaning way that cleaning and degreasing process section in process of production adopts with steel is that alkali hydro-peening, alkali are scrubbed, high pressure water hydro-peening, water are scrubbed, water hydro-peening, warm air drying.The cleaning of belt steel surface is the important step in producing with steel, its surface cleaning quality directly affects strip quality, cleaning on the one hand is the greasy dirt that washes surface of steel plate, is dust and the iron rust that washes surface of steel plate on the other hand, is beneficial to the surface treatment with steel.Impurity in alkaline wash is mainly that the suspended substances such as the grease brought into of belt steel surface and metallic dust, iron scale particle are bonded together, form the iron oil mixt, when its concentration acquires a certain degree, the cleaning quality of alkaline wash will be affected, so iron oil mixt in alkaline wash must be removed, to improve the clean-up performance of alkaline wash, thereby alkaline wash is recycled, reduce alkaline wash consumption.At present, alkaline wash filters and adopts other filter mode, and mainly there are the following problems:
Mostly adopt basket type strainer+bar magnet filter or paper tape filter, the technology pattern of basket type strainer+magnetic bar filter (excellent chain type magnetic filter) is: basket type strainer purpose is to remove large particle, magnetic filter can only be by magnetic to iron powder or be with magnetic particle to play the removal effect.Because magnetic-particle has and far has closely apart from the magnetic center, therefore its adsorption effect has ununiformity, and the impurity such as the nonmagnetic greasy dirt of major part and greasy filth mixture, silicon-dioxide are not had to scavenging(action), its filter effect has certain limitation, does not fundamentally shorten the magnitude of recruitment of drain time, reduction alkali lye and the pure water of alkaline wash.
Magnetic filter is not obvious to the removal effect of grease, simultaneously because grease is easy to form greasy filth with iron powder adsorption, bar magnet is in the process of removing iron powder, especially easily be subject to the pollution of grease, need to clean frequently its normal operation of guarantee, the mixing wastewater with air that needs high temperature during its backwash, energy consumption is very large.Owing to can not well removing grease, cause alkaline wash to be changed frequently, consumption is very large simultaneously; Frequent grease of discharging also needs to carry out processing up to standard just can entered environment, causes production cost to increase.
Paper tape filter is mainly to remove iron powder, greasy filth (iron oil mixt) and other granule foreigns in the alkaline wash purification filtering, free oil slick is not had to filter effect, can be along the paper tape hole through going, get back to again in alkaline wash, oil slick can be cumulative like this, affect the cleaning performance of alkaline wash, filter paper hole due to the paper tape filter adopted at present is larger simultaneously, generally 20 ~ 40 μ m, the impurity that is less than the paper tape hole just is easy to through paper tape, come back in alkaline wash, cause for a long time alkaline wash still very dirty.
Summary of the invention
For overcoming above-mentioned deficiency, the invention provides that a kind of to have a deoiling effect good, filtering accuracy is high, after filter, liquid is limpid, do not change other physicochemical characteristics such as alkaline wash character, concentration, liquid fully recovering, dry residue emission, without any environmental pollution, the steel rolling alkaline wash of save energy filters and recovering system.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of steel rolling alkaline wash filters and recovering system, it is characterized in that: alkaline wash circulation groove 1 is connected with inclined plate grease groove 3 by lift pump 2, inclined plate grease groove 3 is connected with self-cleaning filter 5 by force (forcing) pump 4, self-cleaning filter 5 is connected with micro-filtration unit 6 by liquid feed valve 14, micro-filtration unit 6 is connected with alkaline wash circulation groove 1 with liquid-outlet valve 16 by backwash shunt valve 15, inclined plate grease groove 3 is connected with waste lye storage tank 7 by slag stock pump 8, self-cleaning filter 5 is connected with waste lye storage tank 7 with the wash water valve 17 of micro-filtration unit 6 by bottom, the bottom of inclined plate grease groove 3 is provided with floating oil collecting bucket 9, waste lye storage tank 7 is connected with dewatering unit 10 by residual cake valve 18, dewatering unit 10 is divided into the slag car 11, micro-filtration unit 6 is connected with compressed air reservoir 12 with backwash shunt valve 15 by backwash valve 19, micro-filtration unit 6 is connected with pressurized air input tube 13 by intake valve 20, the top of inclined plate grease groove 3 is provided with chain type oil-scraping device 23, inside is provided with the swash plate 24 from the horizontal by the 60o angle, bottom is provided with several sediment cone buckets 25, the fluid inlet 31 at top is connected with alkaline wash circulation groove 1 by the lift pump 2 be arranged between alkaline wash circulation groove 1 and inclined plate grease groove 3, the oil discharge outlet 32 on top is connected with floating oil collecting bucket 9 by pipeline, the liquid outlet 33 of bottom is connected with self-cleaning filter 5 by the force (forcing) pump 4 be arranged between inclined plate grease groove 3 and self-cleaning filter 5, the sediment cone bucket 25 of bottom is provided with sewage draining exit 34, sewage draining exit 34 is connected with waste lye storage tank 7 by the slag stock pump 8 be arranged between inclined plate grease groove 3 and waste lye storage tank 7, micro-filtration unit 6 is comprised of one or several micro-filtration tank bodies, some composite millipore filter elements of ordered arrangement 22 in its tank body, several liquid outlets 61 of end socket top are by being arranged on micro-filtration unit 6, backwash shunt valve 15 between alkaline wash circulation groove 1 and compressed air reservoir 12, liquid-outlet valve 16 and backwash valve 19 are connected to respectively alkaline wash circulation groove 1 and compressed air reservoir 12, the inlet mouth 62 on tank body top is connected with pressurized air input tube 13 by intake valve 20, the fluid inlet 63 at tank body middle part is connected with self-cleaning filter 5 by the liquid feed valve 14 be arranged between micro-filtration unit 6 and self-cleaning filter 5, the leakage fluid dram 64 of cone bottom is connected with inclined plate grease groove 3 by the tapping valve 21 be arranged between micro-filtration unit 6 and inclined plate grease groove 3, the sewage draining exit 65 of cone base is connected with waste lye storage tank 7 by the wash water valve 17 be arranged between micro-filtration unit 6 and waste lye storage tank 7.
Positively effect of the present invention: the present invention is owing to adopting the inclined plate grease groove; the oil slick that disposable removal is a large amount of and a part of solid particulate; be aided with the preposition protection of self-cleaning filter; guaranteed the stable operation of Microfilter group leader phase; the micro-filtration unit is holding back micron or nanometer particle in alkaline wash mainly; thereby guaranteed the cleanliness factor of alkaline wash, the waste lye that said apparatus is got rid of carries out secondary concentration in the waste lye storage tank simultaneously, concentrated solution dry slag outward transport after dehydration is processed or recycling.This device is applicable in the filtration of steel rolling alkaline wash and recovering and purifying system, there is deoiling effect good, filtering accuracy is high, after filter, liquid is limpid, does not change other physicochemical characteristics such as alkaline wash character, concentration, the liquid fully recovering, save energy, the solid-liquid double back is received, without any environmental pollution, and the characteristics of save energy.
The accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the part sectioned view of inclined plate grease groove in the present invention;
Fig. 3 is the contour structures schematic diagram of micro-filtration unit in the present invention.
In figure: 1 is the alkaline wash circulation groove, 2 is lift pump, 3 is the inclined plate grease groove, 4 is force (forcing) pump, 5 is self-cleaning filter, 6 is the micro-filtration unit, 7 is the waste lye storage tank, 8 is the slag stock pump, 9 is the floating oil collecting bucket, 10 is dewatering unit, 11 is the slag car, 12 is compressed air reservoir, 13 is the pressurized air input tube, 14 is liquid feed valve, 15 is the backwash shunt valve, 16 is liquid-outlet valve, 17 is wash water valve, 18 is residual cake valve, 19 is backwash valve, 20 is intake valve, 21 is tapping valve, 22 is composite millipore filter element, 23 is the chain type oil-scraping device, 24 is swash plate, 25 is sediment cone bucket, 31 is fluid inlet, 32 is oil discharge outlet, 33 is liquid outlet, 34 is sewage draining exit, 61 is liquid outlet, 62 is inlet mouth, 63 is fluid inlet, 64 is leakage fluid dram, 65 is sewage draining exit.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
A kind of steel rolling alkaline wash filters and recovering system, as shown in Figure 1 to Figure 3, by oil removing, coarse filtration, essence filter, concentrated and dehydration slagging each several part forms, this annexation of installing between each parts is:
Alkaline wash circulation groove 1 is connected with inclined plate grease groove 3 by lift pump 2, inclined plate grease groove 3 is connected with self-cleaning filter 5 by force (forcing) pump 4, self-cleaning filter 5 is connected with micro-filtration unit 6 by liquid feed valve 14, micro-filtration unit 6 is connected with alkaline wash circulation groove 1 with liquid-outlet valve 16 by backwash shunt valve 15, inclined plate grease groove 3 is connected with waste lye storage tank 7 by slag stock pump 8, self-cleaning filter 5 is connected with waste lye storage tank 7 with the wash water valve 17 of micro-filtration unit 6 by bottom, the bottom of inclined plate grease groove 3 is provided with floating oil collecting bucket 9, waste lye storage tank 7 is connected with dewatering unit 10 by residual cake valve 18, dewatering unit 10 is divided into the slag car 11, in this programme, dewatering unit 10 is plate-and-frame filter press or centrifuge, micro-filtration unit 6 is connected with compressed air reservoir 12 with backwash shunt valve 15 by backwash valve 19, micro-filtration unit 6 is connected with pressurized air input tube 13 by intake valve 20, the top of inclined plate grease groove 3 is provided with chain type oil-scraping device 23, inside is provided with swash plate 24, swash plate 24 is divided into multi-disc, from the horizontal by 60 degree angles, bottom is provided with several sediment cone buckets 25, the fluid inlet 31 at top is connected with alkaline wash circulation groove 1 by the lift pump 2 be arranged between alkaline wash circulation groove 1 and inclined plate grease groove 3, the oil discharge outlet 32 on top is connected with floating oil collecting bucket 9 by pipeline, the liquid outlet 33 of bottom is connected with self-cleaning filter 5 by the force (forcing) pump 4 be arranged between inclined plate grease groove 3 and self-cleaning filter 5, the sediment cone bucket 25 of bottom is provided with sewage draining exit 34, sewage draining exit 34 is connected with waste lye storage tank 7 by the slag stock pump 8 be arranged between inclined plate grease groove 3 and waste lye storage tank 7, micro-filtration unit 6 is comprised of one or several micro-filtration tank bodies, some composite millipore filter elements of ordered arrangement 22 in its tank body, several liquid outlets 61 of end socket top are by being arranged on micro-filtration unit 6, backwash shunt valve 15 between alkaline wash circulation groove 1 and compressed air reservoir 12, liquid-outlet valve 16 and backwash valve 19 are connected to respectively alkaline wash circulation groove 1 and compressed air reservoir 12, the inlet mouth 62 on tank body top is connected with pressurized air input tube 13 by intake valve 20, the fluid inlet 63 at tank body middle part is connected with self-cleaning filter 5 by the liquid feed valve 14 be arranged between micro-filtration unit 6 and self-cleaning filter 5, the leakage fluid dram 64 of cone bottom is connected with inclined plate grease groove 3 by the tapping valve 21 be arranged between micro-filtration unit 6 and inclined plate grease groove 3, the sewage draining exit 65 of cone base is connected with waste lye storage tank 7 by the wash water valve 17 be arranged between micro-filtration unit 6 and waste lye storage tank 7.
Working process of the present invention is: during filtration, filter alkaline wash in alkaline wash circulation groove 1 enters in inclined plate grease groove 3 through the fluid inlet 31 of lift pump 2 through top, and current stratified flow state in swash plate 24, after sewage flows into inclined plate grease groove 3, along plate towards dirty, from water side, discharge.Sewage from swash plate 24 by the time, the elaioleucite in water floats to the lower surface of swash plate 24, and upwards flows along the lower surface of swash plate 24, floating to the water surface, the chain type oil-scraping device 23 by the pond face be pushed to oil discharge outlet 32 by row of conduits to floating oil collecting bucket 9; Mud in water sinks to the upper surface of swash plate 24, and landing enters at the bottom of pond in sediment cone bucket 25, by sewage draining exit 34 in slag stock pump 8 is expelled to waste lye storage tank 7; Alkaline wash after inclined plate grease groove 3 is processed is delivered in self-cleaning filter 5 by force (forcing) pump 4 through the liquid outlet 33 of bottom; The main alkaline wash unprecipitated large granular impurity in inclined plate grease groove 3 that filters of self-cleaning filter 5, filtering accuracy is 50 μ m, so just can will be greater than the catching, solid particles of 50 μ m, thereby extend the backwash cycle of micro-filtration unit 6, improve the work-ing life of micro-filtration unit 6.Under the effect of force (forcing) pump 4, alkaline wash by self-cleaning filter 5 in liquid feed valve 14 enters the tank body of micro-filtration unit 6, after composite millipore filter element 22, clean alkaline wash enters in alkaline wash circulation groove 1 through backwash shunt valve 15 and liquid-outlet valve 16, tiny impurity particle is held back by composite millipore filter element 22, when the inside and outside differential pressure of composite millipore filter element 22 reaches set(ting)value, need carry out back flushing to composite millipore filter element 22, now first by emptying rate of liquid in the tank body of micro-filtration unit 6, at first successively by force (forcing) pump 4, liquid feed valve 14, backwash shunt valve 15 and liquid-outlet valve 16 are closed, then open tapping valve 21 and intake valve 20, by pressurized air 13 by emptying rate of liquid in the tank body of micro-filtration unit 6, then tapping valve 21 and intake valve 20 are closed, open wash water valve 17, open backwash valve 19, then open successively backwash shunt valve 15, composite millipore filter element in the tank body of micro-filtration unit 6 22 is carried out to the subregion backwash, after backwash, underflow liquid is in wash water valve 17 enters waste lye storage tank 7, after backwash finishes, micro-filtration unit 6 reenters filtration condition.Enter the interior impurity of salkali waste liquid bath 7 after the certain hour deposition, by residual cake valve 18, enter in dewatering unit 10 and carry out sludge dewatering, the dry slag of eliminating is processed or is recycled by the slag car 11 outward transports, and the liquid of eliminating returns to inclined plate grease groove 3.
Claims (2)
1. a steel rolling alkaline wash filters and recovering system, it is characterized in that: alkaline wash circulation groove (1) is connected with inclined plate grease groove (3) by lift pump (2), inclined plate grease groove (3) is connected with self-cleaning filter (5) by force (forcing) pump (4), self-cleaning filter (5) is connected with micro-filtration unit (6) by liquid feed valve (14), micro-filtration unit (6) is connected with alkaline wash circulation groove (1) with liquid-outlet valve (16) by backwash shunt valve (15), inclined plate grease groove (3) is connected with waste lye storage tank (7) by slag stock pump (8), self-cleaning filter (5) is connected with waste lye storage tank (7) with the wash water valve (17) of micro-filtration unit (6) by bottom, the bottom of inclined plate grease groove (3) is provided with floating oil collecting bucket (9), waste lye storage tank (7) is connected with dewatering unit (10) by residual cake valve (18), dewatering unit (10) is divided into the slag car (11), micro-filtration unit (6) is connected with compressed air reservoir (12) with backwash shunt valve (15) by backwash valve (19), micro-filtration unit (6) is connected with pressurized air input tube (13) by intake valve (20), the top of inclined plate grease groove (3) is provided with chain type oil-scraping device (23), the inside of inclined plate grease groove (3) is provided with the swash plate (24) from the horizontal by the 60o angle, bottom is provided with several sediment cone buckets (25), the fluid inlet at top (31) is connected with alkaline wash circulation groove (1) by the lift pump (2) be arranged between alkaline wash circulation groove (1) and inclined plate grease groove (3), the oil discharge outlet on top (32) is connected with floating oil collecting bucket (9) by pipeline, the liquid outlet of bottom (33) is connected with self-cleaning filter (5) by the force (forcing) pump (4) be arranged between inclined plate grease groove (3) and self-cleaning filter (5), the sediment cone bucket (25) of bottom is provided with sewage draining exit (34), sewage draining exit (34) is connected with waste lye storage tank (7) by the slag stock pump (8) be arranged between inclined plate grease groove (3) and waste lye storage tank (7), micro-filtration unit (6) is comprised of one or several micro-filtration tank bodies, some composite millipore filter elements of ordered arrangement (22) in its tank body, several liquid outlets of end socket top (61) are by being arranged on micro-filtration unit (6), backwash shunt valve (15) between alkaline wash circulation groove (1) and compressed air reservoir (12), liquid-outlet valve (16) and backwash valve (19) are connected to respectively alkaline wash circulation groove (1) and compressed air reservoir (12), the inlet mouth on tank body top (62) is connected with pressurized air input tube (13) by intake valve (20), the fluid inlet (63) at tank body middle part is connected with self-cleaning filter (5) by the liquid feed valve (14) be arranged between micro-filtration unit (6) and self-cleaning filter (5), the leakage fluid dram of cone bottom (64) is connected with inclined plate grease groove (3) by the tapping valve (21) be arranged between micro-filtration unit (6) and inclined plate grease groove (3), the sewage draining exit of cone base (65) is connected with waste lye storage tank (7) by the wash water valve (17) be arranged between micro-filtration unit (6) and waste lye storage tank (7).
2. a kind of steel rolling alkaline wash according to claim 1 filters and recovering system, and it is characterized in that: described dewatering unit (10) is plate-and-frame filter press or centrifuge.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210444928.XA CN102887597B (en) | 2012-11-09 | 2012-11-09 | Steel rolling alkali wash water filtering and recycling system |
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| CN201210444928.XA CN102887597B (en) | 2012-11-09 | 2012-11-09 | Steel rolling alkali wash water filtering and recycling system |
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| CN102887597A CN102887597A (en) | 2013-01-23 |
| CN102887597B true CN102887597B (en) | 2014-01-08 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104803513A (en) * | 2015-04-23 | 2015-07-29 | 刘洋 | Bioreaction wastewater treatment device |
| CN104803499B (en) * | 2015-04-23 | 2016-09-21 | 南京蓝莹环境科技有限公司 | A kind of integrated machine for sewage treatment |
| CN106521531B (en) * | 2016-11-11 | 2018-11-20 | 攀钢集团西昌钢钒有限公司 | Continuous annealing and/or washing section of galvanized set recycle of alkali liquor method and apparatus |
| CN108465282B (en) * | 2018-05-31 | 2024-05-07 | 浙江东瓯过滤机制造有限公司 | Filtering and washing device and filtering and washing process for ternary precursor small particles |
| CN108613200B (en) * | 2018-06-29 | 2024-03-12 | 宝武集团环境资源科技有限公司 | Pretreatment system and pretreatment method for oil-containing waste liquid of steel rolling system before incineration disposal |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101148280A (en) * | 2007-09-05 | 2008-03-26 | 三达膜科技（厦门）有限公司 | Purifying and reclaiming method for alkali waste water based on film technique |
| CN100582080C (en) * | 2007-11-13 | 2010-01-20 | 浙江大学 | Epoxy ester wastewater recycling treatment method |
| CN101766928B (en) * | 2009-10-22 | 2012-01-11 | 温州市精工啤酒设备成套有限公司 | Polluted alkali liquid reclaiming device |
| CN102424498B (en) * | 2011-10-19 | 2013-09-25 | 谢辉灿 | Circular and comprehensive utilization method for ethylene alkali waste liquid |
| CN202936268U (en) * | 2012-11-09 | 2013-05-15 | 丹东东方机电工程有限公司 | Steel rolling alkali wash water filtering and recovering system device |
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Application publication date: 20130123 Assignee: Dandong China Environmental Protection Technology Co., Ltd. Assignor: Dandong East Electrical-Mechanical Project Co., Ltd. Contract record no.: 2017990000130 Denomination of invention: Steel rolling alkali wash water filtering and recycling system Granted publication date: 20140108 License type: Common License Record date: 20170411 |
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