CN101475269B - Comprehensive treating and recycling method for steel wastewater and apparatus thereof - Google Patents

Comprehensive treating and recycling method for steel wastewater and apparatus thereof Download PDF

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Publication number
CN101475269B
CN101475269B CN2009100281837A CN200910028183A CN101475269B CN 101475269 B CN101475269 B CN 101475269B CN 2009100281837 A CN2009100281837 A CN 2009100281837A CN 200910028183 A CN200910028183 A CN 200910028183A CN 101475269 B CN101475269 B CN 101475269B
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water
pond
pump
wastewater
pipe
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CN101475269A (en
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陈伟
张国平
刘炳生
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Shanghai Limo Environment Technology Co Ltd
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Hengtong Advanced Water Treatment Shanghai Co Ltd
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Abstract

The present invention relates to a method for treating and recycling steel comprehensive wastewater and a device thereof. The method comprises the following steps: 1, wastewater pretreatment; and 2, treatment of recycle-water. The structure of the device uses 'a grating-an aeration grease removal tank-a wastewater regulating reservoir-a high-efficiency sedimentation tank-a novel filter chamber-a self-cleaning filter-UF-a safety filter-RO1-RO2-MB' to treat and recycle the steel comprehensive wastewater. The method and the device have the advantages that a process of wastewater pretreatment and recycle-water treatment is provided for the steel comprehensive wastewater; technologies of grease removal, sedimentation, filtration and membrane separation are completely combined; the novel filter chamber adopts filter blocks with water return holes, and has good effect of even back flushing; different recycling aims can be met by the UF, the RO and the MB; and yielding water has stable and reliable quality, and reaches harmony of water conservation and enterprise development.

Description

Comprehensive treating and recycling method for steel wastewater and device thereof
Technical field
What the present invention relates to is a kind of comprehensive treating and recycling method for steel wastewater and device thereof, belongs to the technical field of Industrial Wastewater Treatment.
Background technology
The Iron And Steel Industry water consumption is very big, and usually ton steel water consumption is at 4~10 tons, and the waste water of discharging in the production process is mainly derived from the rinse water or the like in recirculated cooling water, equipment and the place of production process water, equipment and product.
Divide from production technique, steel wastewater mainly comprises waste water such as sintering, ironmaking, steel-making, steel rolling (hot rolling, cold rolling), coking.The characteristics that wherein contain a large amount of phenol, cyanogen, ammonia nitrogen, organic pollutant at coking chemical waste water are generally carried out special materialization and biochemical treatment, qualified discharge; Contain the characteristics of oil, soda acid, emulsion at cold rolling wastewater, carry out oil removing, neutralizing treatment respectively, and utilize ceramic membrane that emulsion is recycled; The waste water that remaining production technique produces, circulation sewer, Cleaning Wastewater etc. constitute the iron and steel comprehensive wastewater, and its character is a kind of big yield, oligosaprobic trade effluent.
Domestic in recent years iron and steel output constantly enlarges, fast development of national economy has been played supporting role preferably, iron and steel enterprise is again the rich and influential family of a water consumption simultaneously, and Iron and Steel Production needs a large amount of water of productive use, has especially seriously restricted the development of iron and steel enterprise in the northern China water-deficient area.This just requires us to reduce the water consumption of ton steel again when improving constantly the output of iron and steel, resolves the problem that the iron and steel comprehensive wastewater is handled reuse.Present domestic iron and steel comprehensive wastewater treatment technology is mainly " dosing-precipitation-filtration " qualified discharge, the pollution problem that part has solved steel wastewater, but also wasted precious water resource, so China is in development of iron and steel enterprises, be badly in need of a kind of Technology at processing of iron and steel comprehensive wastewater and reuse, both reach the pollution problem that solves steel wastewater, reached the purpose of industrial production water saving and iron and steel enterprise's long-run development again.
Summary of the invention
The present invention proposes a kind of comprehensive treating and recycling method for steel wastewater and device thereof.Purpose is intended to propose a kind of characteristics at the iron and steel comprehensive wastewater, is handled and reuse, solves iron and steel enterprise's waste water pollution problem and water saving.Design a kind of brand-new Wastewater Pretreatment and reuse water treatment process, promptly utilized " grid-aeration grease removal tank-wastewater equalization pond-efficient sedimentation tank-novel filter tank-self-cleaning filter-UF-strainer-RO that ensures public security 1-RO 2-MB " the iron and steel comprehensive wastewater is handled and reuse in addition.
Technical solution of the present invention: comprehensive treating and recycling method for steel wastewater comprises following processing step: one, Wastewater Pretreatment, two, reuse water handles;
Described wastewater preprocessing process step 1, the influent quality of iron and steel comprehensive wastewater is: COD 40~120mg/L, oil<50mg/L, SS<200mg/L, TDS<3000mg/L, pH 6~10, enter grid through pipeline, the grid slag that dams is regularly transported outward, the water outlet of grid enters the aeration grease removal tank, the aeration oil removing blower fan that is connected the aeration grease removal tank makes the profit of aeration grease removal tank emersion enter oil-water separation tank, the isolated waste oil outward transport of oil-water separation tank, oil removing water flows into wastewater equalization pond, the water outlet of aeration grease removal tank enters wastewater equalization pond, the precipitation medicine system was with flocculation agent when the water outlet of wastewater equalization pond entered settling tank by lift pump, lime and coagulant aids add settling tank, the precipitating sludge of settling tank drains into device for dehydrating sladge waste, the dried mud outward transport that device for dehydrating sladge waste produces, the filtrate of device for dehydrating sladge waste is back to wastewater equalization pond, the water outlet of settling tank enters the filter tank, further remove the SS in the waste water, COD, oil contaminants, COD<the 40mg/L that makes the pre-treatment water outlet, oil<1mg/L, SS<20mg/L is to satisfy the requirement that follow-up reuse water is handled; The water outlet in filter tank enters clean water basin, and wastewater equalization pond is got back in the back flushing draining in filter tank;
Described reuse water treatment process steps two, to enter clean water basin through the water outlet of Wastewater Pretreatment, the water outlet of UF medicine system also inserts self-cleaning filter when entering self-cleaning filter by the UF pump, the water outlet of self-cleaning filter enters the UF pond through the UF device, UF pond rising pipe inserts the UF device by the UF backwashing pump, the back flushing draining of UF device flows into wastewater equalization pond, and the water outlet of the water outlet in UF pond by middle water pump and RO medicine system is through security personnel's strainer and pass through RO 1High-pressure pump enters RO 1Device, RO 1The RO of device 1Dense water discharges outward, RO 1The water outlet of device enters RO 1The pond, RO 1RO is leaded up in the water outlet in pond 2High-pressure pump, RO 2Device, RO 2Pond, MB pump enter MB equipment, and the water outlet of MB equipment enters the desalination pond, enter MB equipment by the MB regenerative pump with the water outlet of MB regeneration medicine system then, and MB equipment is regenerated; RO 1Another road water outlet in pond enters softening agent by softening pump, and the water outlet of softening agent enters the soft water pond, and the water outlet in soft water pond is sent softening water outside by softened water pump, through RO 2Device, MB equipment are to carry out desalting treatment to satisfy the requirement of boiler de-mineralized water.
The iron and steel comprehensive wastewater is handled the device of reuse, it is characterized in that comprising Wastewater Pretreatment part and reuse water treating part, wherein the rising pipe in novel filter tank and the water inlet pipe of the clean water basin in the reuse water treating part join in the Wastewater Pretreatment part, be connected in series the filter back washing pump between the backflushing water intake pipe in filter tank and the rising pipe of clean water basin
Advantage of the present invention: (1) has provided a kind of Wastewater Pretreatment and reuse water treatment process at the iron and steel comprehensive wastewater; (2) oil removing, precipitation, filtration and membrane separation technique are carried out complete combination; (3) filter block of taking back the water hole is adopted in novel filter tank, and it is evenly effective to recoil; (4) utilize UF, RO, MB can satisfy different reuse purposes; (5) stable effluent quality is reliable, has reached the harmony of water saving and enterprise development.
Description of drawings
Accompanying drawing 1 is the structural representation that the iron and steel comprehensive wastewater is handled reclamation set.
A among the figure represents the iron and steel comprehensive wastewater, and C represents the grid slag, and D represents profit, and E represents the waste oil outward transport, and F represents to remove profit, and G represents precipitating sludge, and H represents to transport outward dried mud, and I represents the filtrate of refluxing, and J represents the filter back washing draining, and K represents UF back flushing draining, and L represents RO 1Concentrated water discharge, M represents RO 2Dense water returns the UF water tank, and N represents that softening water sends outside, and R represents MB regeneration draining, and S represents that de-mineralized water sends outside; P 1The expression lift pump, P 2Expression filter back washing pump, P 3Expression UF pump, P 4Expression UF backwashing pump, P 5Water pump in the middle of the expression, P 6Expression RO 1High-pressure pump, P 7Expression RO 2High-pressure pump, P 8The softening pump of expression, P 9Expression MB pump, P 10Expression MB regenerative pump, P 11Expression desalination water pump, P 12The expression softened water pump; B 1Expression aeration oil removing blower fan, B 2Expression filter back washing blower fan; 1 expression grid, 2 expression aeration grease removal tanks, 3 expression oil-water separation tanks, 4 expression wastewater equalization ponds, 5 expression precipitation medicine systems, 6 expression efficient sedimentation tank, 7 expression device for dehydrating sladge waste, the novel filter tank of 8 expressions, 9 expression clean water basin, 10 expression UF medicine systems, 11 expression self-cleaning filters, 12 expression UF devices, 13 expression UF ponds, 14 expression security personnel strainers, 15 expression RO medicine systems, 16 expression RO 1Device, 17 expression RO 1The pond, 18 expression RO 2Device, 19 expression RO 2The pond, 20 expression MB equipment, 21 expression MB regeneration medicine systems, 22 expression desalination ponds, 23 expression softening agents, 24 expression soft water ponds.
Described UF is that ultrafiltration, MB are that mixed bed, RO are reverse osmosis, RO 1Be first-stage reverse osmosis, RO 2It is two-pass reverse osmosis.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is further described:
Contrast accompanying drawing 1, the iron and steel comprehensive wastewater is handled recycling method, and this method comprises following processing step:
One, Wastewater Pretreatment, iron and steel comprehensive wastewater A enters grid 1 through pipeline, and the grid slag C that dams regularly transports outward, and the water outlet of grid 1 enters aeration grease removal tank 2, aeration oil removing blower fan B 1The outlet side connect the inlet end of aeration grease removal tank 2, the profit D of aeration grease removal tank 2 emersions enters oil-water separation tank 3, and oil-water separation tank 3 isolated waste oil E outward transports remove profit F and flow into wastewater equalization pond 4, the water outlet of aeration grease removal tank 2 enters wastewater equalization pond 4, lift pump P 1Feed-water end connect the outlet of wastewater equalization pond 4, lift pump P 1The water side iron and steel comprehensive wastewater is risen to the feed-water end of settling tank 6, precipitation medicine system 5 adds flocculation agent, lime and coagulant aids the feed-water end of settling tank 6, the precipitating sludge G of settling tank 6 drains into device for dehydrating sladge waste 7, the dried mud H outward transport that device for dehydrating sladge waste 7 produces, the filtrate I of device for dehydrating sladge waste 7 is back to wastewater equalization pond 4, the water outlet of settling tank 6 enters filter tank 8, and the water outlet in filter tank 8 enters clean water basin 9, filter back washing blower fan B 2The outlet side be connected to the inlet end in filter tank 8, filter back washing pump P 2Feed-water end connect the water outlet of clean water basin 9, filter back washing pump P 2The water side connect the recoil feed-water end in filter tank 8, the back flushing draining J in filter tank 8 gets back to wastewater equalization pond 4;
Two, the processing of reuse water, UF pump P 3Feed-water end connect the water side of clean water basin 9, UF pump P 3Water outlet enter the feed-water end of self-cleaning filter 11, the water outlet of self-cleaning filter 11 is to the feed-water end of UF device 12, the water outlet of UF medicine system 10 is connected to the feed-water end of self-cleaning filter 11, the water outlet of UF device 12 enters UF pond 13, UF backwashing pump P 4Feed-water end connect the water outlet in UF pond 13, UF backwashing pump P 4The water side connect the back flushing feed-water end of UF device 12, the back flushing draining K of UF device 12 flows into wastewater equalization pond 4, middle water pump P 5Feed-water end connect the water outlet in UF pond 13, middle water pump P 5The water side be connected to security personnel strainer 14 feed-water end, RO medicine system 15 also be connected to security personnel strainer 14 feed-water end, RO 1High-pressure pump P 6Feed-water end connect the water side of security personnel's strainer 14, RO 1High-pressure pump P 6The water side connect RO 1The feed-water end of device 16, RO 1Dense water L discharging, RO 1The water outlet of device 16 is to RO 1Pond 17, softening pump P 8Entrance end connect RO 1The water side in pond 17, softening pump P 8Water outlet after softening agent 23 is further softening, enter soft water pond 24, softened water pump P 12Feed-water end connect the outlet in soft water pond 24, softened water pump P 12Water outlet send reuse outside, RO for softening water N 2High-pressure pump P 7Feed-water end connect RO 1The water side of water tank 17, RO 2High-pressure pump P 7The water side connect RO 2The feed-water end of device 18, RO 2The water outlet of device 18 enters RO 2Pond 19, RO 2The RO of device 18 2Dense water M gets back to UF pond 13, MB pump P 9Feed-water end connect RO 2The water side in pond 19, MB pump P 9The water side connect the feed-water end of MB equipment 20, the water outlet of MB equipment 20 enters desalination pond 22, MB regenerative pump P 10Feed-water end connect the water side in desalination pond 22, MB regenerative pump P 10The water side connect the regeneration feed-water end of MB equipment 20, the water outlet of MB regeneration medicine system 21 also is connected to the regeneration feed-water end of MB equipment 20, MB regeneration draining R discharging, desalination water pump P 11Feed-water end connect the water side in desalination pond 22, desalination water pump P 11The de-mineralized water S of water side sends the salt solution user outward.
The iron and steel comprehensive wastewater is handled reclamation set, its structure is to comprise Wastewater Pretreatment part and reuse water treating part, wherein the rising pipe in filter tank 8 and the water inlet pipe of the clean water basin 9 in the reuse water treating part join in the Wastewater Pretreatment part, are connected in series filter back washing pump P between the rising pipe of the backflushing water intake pipe in filter tank 8 and clean water basin 9 2
Grid 1 import in the described Wastewater Pretreatment part and the rising pipe of iron and steel comprehensive wastewater A join, and the water inlet pipe of the rising pipe of grid 1 and aeration grease removal tank 2 joins, and meets aeration oil removing blower fan B on the inlet pipe of aeration grease removal tank 2 1Escape pipe, the oil outlet pipe of aeration grease removal tank 2 connects the oil inlet pipe of oil-water separation tank 3, the rising pipe of aeration grease removal tank 2 connects the water inlet pipe of wastewater equalization pond 4, the rising pipe of wastewater equalization pond 4 is by lift pump P 1Connect the rising pipe of precipitation medicine system 5, the water inlet pipe of settling tank 6 respectively, the mud pipe that advances of the sludge out pipe of settling tank 6 and device for dehydrating sladge waste 7 joins, the rising pipe of settling tank 6 connects the water inlet pipe in filter tank 8, the backflow water inlet pipe of the rising pipe of the rising pipe of oil-water separation tank 3, device for dehydrating sladge waste 7 and wastewater equalization pond 4 joins, and the inlet pipe in filter tank 8 meets filter back washing blower fan B 2Escape pipe, the filter back washing water shoot in filter tank 8 and the backflow water inlet pipe of wastewater equalization pond 4 join, the rising pipe in filter tank 8 connects the water inlet pipe of clean water basin 9.
The rising pipe of the clean water basin 9 in the described reuse water treating part is by UF pump P 3Join with the rising pipe of UF medicine system 10, the water inlet pipe of self-cleaning filter 11, the water inlet pipe of the rising pipe of self-cleaning filter 11 and UF device 12 joins, and is connected in series UF backwashing pump P between the back flushing water inlet pipe of UF device 12 and the rising pipe in UF pond 13 4, the water inlet pipe in the rising pipe of UF device 12 and UF pond 13 joins, and the back flushing water shoot of UF device 12 and the backflow water inlet pipe of wastewater equalization pond 4 join, and the rising pipe in UF pond 13 is by middle water pump P 5Join with security personnel's strainer 14, the rising pipe of RO medicine system 15 joins with security personnel's strainer 14, and the rising pipe of security personnel's strainer 14 passes through RO 1High-pressure pump P 6With RO 1The water inlet pipe of device 16 joins RO 1The rising pipe and the RO of device 16 1The water inlet pipe in pond 17 joins, RO 1The rising pipe in pond 17 passes through RO 2High-pressure pump P 7With RO 2Device 18 joins RO 1The rising pipe in pond 17 is by softening pump P 8Join RO with the water inlet pipe of softening agent 23 2The rising pipe and the RO of device 18 2The water inlet pipe in pond 19 joins, RO 2The rising pipe in pond 19 is by MB pump P 9Join with the water inlet pipe of MB equipment 20, the water inlet pipe in the rising pipe of MB equipment 20 and desalination pond 22 joins, and the desalination water pump P is installed on the rising pipe in desalination pond 22 11, the rising pipe in desalination pond 22 is by MB regenerative pump P 10Join with the regeneration water inlet pipe of MB equipment 20, the rising pipe of MB regeneration medicine system 21 and the regeneration water inlet pipe of MB equipment 20 join, and the water inlet pipe in the rising pipe of softening agent 23 and soft water pond 24 joins, and softened water pump P is installed on the rising pipe in soft water pond 24 12
During work, in the Wastewater Pretreatment part, iron and steel comprehensive wastewater A enters grid through pipeline, utilizes big solid waste in the grid automatic-diversion closure waste water, and the grid slag C of generation regularly transports outward, and the water outlet of grid enters the aeration grease removal tank, at aeration oil removing blower fan B 1Effect under the oil in the aeration grease removal tank waste water is separated, the profit D of emersion enters oil-water separation tank, isolates waste oil E outward transport and handle under the effect of oil-water separation tank, and the profit F that removes that removes waste oil flows into wastewater equalization pond, the water outlet of aeration grease removal tank enters wastewater equalization pond, utilizes lift pump P 1Waste water is risen to efficient sedimentation tank from wastewater equalization pond, with precipitating medicine system with flocculation agent, lime and coagulant aids add efficient sedimentation tank, utilize efficient sedimentation tank with the part organic pollutant in the waste water, SS, the temporary hardness precipitation is removed, the precipitating sludge G of efficient sedimentation tank drains into device for dehydrating sladge waste, utilize device for dehydrating sladge waste with sludge dewatering, the dried mud H outward transport landfill that device for dehydrating sladge waste produces, the filtrate I that device for dehydrating sladge waste produces is back to wastewater equalization pond, the water outlet of efficient sedimentation tank enters novel filter tank, the water outlet in novel filter tank enters clean water basin, utilizes filter back washing blower fan B 2With the filter back washing water pump P 2Combined water and air backwash is carried out in the filter tank, and here, novel filter tank adopts the filter block of taking back the water hole specially to support filtrate, and its backwash gas water distribution is even, and backwash effect is good, filter back washing pump P 2From the clean water basin water intaking, the back flushing draining J in novel filter tank gets back to wastewater equalization pond; In the treating part of reuse water, utilize UF pump P 3Water in the clean water basin is squeezed into self-cleaning filter; filter out particulate matter greater than 100 μ m; to protect follow-up UF device; utilize the UF medicine system medicament of UF to be added in the feed-water end of self-cleaning filter simultaneously; the water outlet of self-cleaning filter enters the UF device; utilize the UF device further to filter out pollutent in the water, the water outlet of UF device enters the UF pond, and the back flushing of UF device is by UF backwashing pump P 4The water that extracts the UF pond carries out, and the back flushing draining K of UF device flows into wastewater equalization pond, water pump P in the middle of utilizing again 5The UF pond is flowed into wastewater equalization pond, water pump P in the middle of utilizing again 5The RO that the pressurization of UF tank water is added with the RO medicine system protects medicament through the particulate matter of security personnel's strainer elimination greater than 5 μ m, with protection RO 1The work of device, water outlet is through RO 1High-pressure pump P 6Add high pressure and enter RO 1Device utilizes the RO film to remove water pollutant and salt, RO 1Dense water L discharging, RO 1The water outlet of device enters RO 1The pond is by softening pump P 8With RO 1Part water outlet in the pond enters the soft water pond again after softening agent is softening, utilize softened water pump P 12N sends reuse outside with softening water, and softening agent is regenerated with salt, utilizes RO simultaneously 2High-pressure pump P 7With RO 1Water outlet in the pond adds high pressure and enters RO 2Device utilizes RO 2Enter RO after installing further desalination 2The pond, RO 2The RO of device 2Dense water M gets back to the UF pond, utilizes MB pump P at last 9With RO 2The water outlet in pond is squeezed into MB equipment and is carried out final desalination, reaches the requirement of boiler de-mineralized water, and the water outlet of MB equipment enters the desalination pond, and utilizes the desalination water pump P 11Send de-mineralized water S outside the de-mineralized water user, the regeneration of MB equipment is by MB regenerative pump P 10From desalination pond water intaking, and add HCl respectively with NaOH regenerates to MB by MB regeneration medicine system, discharge among the MB regeneration draining R and back.The filter block of taking back the water hole is adopted in the filter tank.
Embodiment a: 25000m of NORTHWEST CHINA 3/ D iron and steel comprehensive wastewater is handled the reuse project.
1. the processing water yield:
The iron and steel comprehensive wastewater water yield is 25000m 3/ D (1040m 3/ h), Wastewater Pretreatment water outlet 1040m 3/ h, the reuse water treat effluent has: circulating water system 613m 3/ h, softening water 200m 3/ h, de-mineralized water 75m 3/ h.
2. influent quality:
Iron and steel comprehensive wastewater water quality (except that pH, unit: mg/L)
Project COD Cr Oil SS Temporary hardness pH TDS
Numerical value <110 <30 <150 <280 6~9 <1380
3. effluent quality:
(except that pH, turbidity unit is NTU to the Wastewater Pretreatment effluent quality, other unit: mg/L)
Project COD Cr Oil SS Temporary hardness pH Turbidity
Numerical value ≤30 ≤0.5 ≤2 ≤100 7~8 ≤2
Circulating water system water quality
Take Wastewater Pretreatment water outlet 440m 3/ h and RO 1Water outlet 173m 3/ h mixing is blent, and regulates according to practical situation and blends ratio, satisfies TDS≤1000mg/L.
Softening water and de-mineralized water water quality
Project Carbonate hardness Basicity pH Specific conductivity SiO 2 Na +
Unit mmol/L mmol/L ? μs/cm μg/L μg/L
Softening water ≤0.030 ≤2.5 7~8 ? ? ?
De-mineralized water 0 ? 8.5~9.2 ≤0.2 ≤20 ≤50
4. system's main design parameters:
● main structure:
Between barrier: 1 of 15mX4m; Pre-treatment workshop (comprise between desliming machine room, control panel, between dosing, Ventilator Room etc.): two layers 1 of 38.5mX14m; Three layers 1 of reuse water processing and office: 46mX24m; Top, the pond top cover in efficient sedimentation tank and novel filter tank: 24mX221 seat.
● main units:
1 of aeration grease removal tank: 14m * 9m * 4.5m (effectively); 1 of oil-water separation tank: 6.2m * 4.5m * 2.5m (effectively); 2 of wastewater equalization pond: 24m * 11m * 4.1m (effectively); 2 of efficient sedimentation tank: 9.3m * 8.5m * 7.1m; 4 of novel filter tank: 8m * 5.4m * 5.2m; 1 of clean water basin: 22.8m * 13.9m * 2.95m (effectively); 1 of circulating cooling make-up water pond: 11.7m * 16m * 6.5m; 1 of UF pond: 11.7m * 6m * 6.5m; RO 11 of pond: 11.7m * 4.5m * 6.5m, 1 of soft water pond: 11.7m * 9m * 6.5m, RO 21 of pond: 11.7m * 3.5m * 6.5m, 1 of desalination pond: 11.7m * 7m * 6.5m.
● the main body water pump:
Lift pump: Q=300m 36 of/h, H=17m, N=18.5kW (wherein 2 variable frequency control, 4 usefulness 2 are equipped with); Filter back washing pump: Q=580m 3/ h, H=12m, 2 of N=37kW (1 usefulness 1 is equipped with); UF pump: Q=350m 3/ h, H=30m, 3 of N=55kW (2 usefulness 1 are equipped with); UF backwashing pump: Q=190m 3/ h, H=20m, 3 of N=18.5kW (2 usefulness 1 are equipped with); Middle water pump: Q=150m 3/ h, H=32m, 5 of N=22kW (4 usefulness 1 are equipped with); RO 1High-pressure pump: Q=150m 34 of/h, H=140m, N=110kW; RO 2High-pressure pump: Q=84m 31 of/h, H=140m, N=45kW; Softening pump: Q=100m 3/ h, H=32m, 3 of N=15kW (2 usefulness 1 are equipped with); MB pump: Q=38m 3/ h, H=32m, 3 of N=7.5kW (2 usefulness 1 are equipped with); MB regenerative pump: Q=8m 31 of/h, H=30m, N=2.2kW; Desalination water pump: Q=80m 3/ h, H=60m, N=22kW2 platform (1 usefulness 1 is equipped with); Softened water pump: Q=200m 3/ h, H=60m, 2 of N=75kW (1 usefulness 1 is equipped with).
● blower fan:
Aeration oil removing blower fan: BK6015 type, 20m 3/ min, 60kPa, 2 of 30kW (1 usefulness 1 is equipped with); Filter tank recoil blower fan; BK8016 type, 27m 3/ min, 60kPa, 3 of 45kW (2 usefulness 1 are equipped with).
● major equipment:
Grid: comprise that pattern is 2 of rotary machine coarse rack pitch 25mm, grid width 800mm, pattern is 2 of rotary machine fine fack pitch 10mm, grid width 800mm, the supporting Shaftless screw conveyor W=3m that is used for the conveying of grid slag 32 of/h, L=9m; Aeration grease removal tank erecting equipment: comprise Sanitair aeration head Φ 229mm, Q=6m 3208 of/h rotate fuel-displaced weir single discharging 1.0m automatically 32 covers; Efficient sedimentation tank erecting equipment: comprise 1 of flash mixer D1900mm, rotating speed 83.3rpm, N=5.5kW, 2 of flocculation agitator D2500mm, rotating speed 5.0~18.5rpm, N=1.1kW, the second third copolymerization inclined tube DH1000 type list pond A=49m 22 ponds, 2 of mud scraper D8000mm, N=0.75kW; Novel filter tank erecting equipment: comprise Leopold S type 48 " X11 " X12 " 430 of filter blocks, quartz sand filter media D0.95~1.3mm 216m 3Device for dehydrating sladge waste: comprise mud spiral pump Q=20m 3/ h, H=120m, 2 of N=7.5kW (1 usefulness 1 is equipped with), plate-and-frame filter press A=300m 2, size 1500mmX1500mm, 76 of sheet frames, 2 of Q=11T/D (dried mud amount), flushing pump Q=5m 3/ h, H=600m, 2 of N=11kW (1 usefulness 1 is equipped with); Self-cleaning filter: CBR-D-M8S type, Q=220m 34 of/h, filtering accuracy 100 μ m (3 usefulness 1 are equipped with); UF device: Q=150m 3/ h, 34/cover of V1072-35-PEC ultra-filtration membrane, 4 covers; Security personnel strainer: Q=150m 3/ h, 5 μ m, 40 " 4 in X50 core; RO 1Device: Q=113m 3/ h (162 of wherein single suit BW30-365FR type RO films, 400PSI 8 " 6 core film pipes 27) 4 covers; Softening agent: Q=100m 33 of/h, D2200mm (wherein separate unit dress 001X7 sun resin is 4.87 tons); RO 2Device: Q=75m 3/ h (wherein 54 of ESPA2+ type RO films, 400PSI 8 " 6 core film pipes 9) 1 cover; MB equipment: Q=38m 33 of/h, D1000 (wherein 0.94 ton of separate unit dress 001X7 sun resin, 1.65 tons of 201X7 negative resins).
● medicine system:
The precipitation medicine system: comprise poly ferric chloride flocculant agent dosing pump GM0120 type, Q=120L/h, P=0.7MPa, N=0.25kW 2 covers (1 usefulness 1 is equipped with), the lime adding equipment comprises lime feed bin 40m 3, bobbing machine N=1.1kW, dry powder add machine DP-800 type, L=1m, N=0.75kW, screw rod and add pump G35-1 type, Q=8m 3/ h, H=20m, each 2 cover of N=3kW (1 usefulness 1 is equipped with), coagulant aids PAM dosing pump Q=300L/h, P=0.35MPa, N=0.75kW 5 covers (4 usefulness 1 are equipped with); UF medicine system: comprise clorox volume pump GM0500 type, Q=500L/h, P=0.5MPa, 2 of N=1.5kW (1 usefulness 1 is equipped with), HCl volume pump GM0500 type, Q=500L/h, P=0.5MPa, 2 of N=1.5kW (1 usefulness 1 is equipped with); RO medicine system: comprise Scale inhibitors volume pump A976 type, Q=1.6L/h, H=0.97MPa, 5 of N=0.022kW (4 usefulness 1 are equipped with), 1 in 500L PE medicine-chest, reductant metering pump C776 type, Q=38L/h, H=0.15MPa, 3 of N=0.044kW (2 usefulness 1 are equipped with), 1 in 1000L PE medicine-chest, non-oxidative bactericide volume pump C776 type, Q=38L/h, H=0.15MPa, 3 of N=0.044kW (2 usefulness 1 are equipped with), 1 in 1000L PE medicine-chest; The MB medicine system of regenerating: comprise acid storage tank 10m 32, sour batch meter 1m 31,1 of Acid injector WGP-3023 type, Q=6T/h, alkali storage tank 10m 32, alkali batch meter 1m 31,1 of alkali injector WGP-3023 type, Q=6T/h.
● other relevant corollary system:
Waste oil is sent pump outside: Q=5m 3/ h, H=15m, 2 of N=0.55kW (1 usefulness 1 is equipped with); Wastewater equalization pond submersible agitator: 4 of QJB5.5/12-620/3-480/S type, N=5.5kW; The circulating cooling make-up water pump (is used for pretreated water and RO 1The water that produces after water is blent is sent outside): Q=210m 3/ h, H=10m, 4 of N=18.5kW (3 usefulness 1 are equipped with); The supporting sludge pump of efficient sedimentation tank: comprise sludge reflux pump (be used to utilize returned sluge to reduce dosage, increase sedimentation effect) Q=11~22.4m 3/ h, H=20m, 4 of N=11kW (2 usefulness 2 are equipped with), mud discharging pump Q=11~22.4m 3/ h, H=20m, 3 of N=11kW (2 usefulness 1 are equipped with); RO flushing pump: Q=150m 31 of/h, H=20m, N=15kW; RO matting equipment: comprise and clean water tank V=5m 31, filter rinsed DN800mm, 5 μ m, 40 " 1 in X50 core, RO flushing water pump Q=150m 31 of/h, H=20m, N=15kW, add HCl, NaOH, NaClO, citric acid batch meter each 1, supporting volume pump each 1; Softening reclaim equiment: comprise softening regenerative pump Q=50m 31 of/h, H=32m, N=11kW, dissolved salt pond 20m 31,1 on salt strainer Y type, 1 of salt ejector WGP-3023 type, Q=32T/h (30% salt solution).

Claims (2)

1. comprehensive treating and recycling method for steel wastewater is characterized in that this method comprises following processing step: one, Wastewater Pretreatment, two, reuse water handles;
Described wastewater preprocessing process step 1, the influent quality of iron and steel comprehensive wastewater is: COD 40~120mg/L, oil<50mg/L, SS<200mg/L, TDS<3000mg/L, pH 6~10, enter grid through pipeline, the grid slag that dams is regularly transported outward, the water outlet of grid enters the aeration grease removal tank, is connected the aeration oil removing blower fan (B of aeration grease removal tank 1) make the profit of aeration grease removal tank emersion enter oil-water separation tank, the isolated waste oil outward transport of oil-water separation tank, oil removing water flows into wastewater equalization pond, and the water outlet of aeration grease removal tank enters wastewater equalization pond, and the water outlet of wastewater equalization pond is by lift pump (P 1) the precipitation medicine system adds settling tank with flocculation agent, lime and coagulant aids when entering settling tank, the precipitating sludge of settling tank drains into device for dehydrating sladge waste, the dried mud outward transport that device for dehydrating sladge waste produces, the filtrate of device for dehydrating sladge waste is back to wastewater equalization pond, the water outlet of settling tank enters the filter tank, further remove SS, COD, oil contaminants in the waste water, COD<40mg/L, the oil<1mg/L, the SS<20mg/L that make the pre-treatment water outlet are to satisfy the requirement that follow-up reuse water is handled; The water outlet in filter tank enters clean water basin, and wastewater equalization pond is got back in the back flushing draining in filter tank;
Described reuse water treatment process steps two will enter clean water basin through the water outlet of Wastewater Pretreatment, by UF pump (P 3) when entering self-cleaning filter the water outlet of UF medicine system also insert self-cleaning filter, the water outlet of self-cleaning filter enters the UF pond through the UF device, UF pond rising pipe is by UF backwashing pump (P 4) inserting the UF device, the back flushing draining of UF device flows into wastewater equalization pond, and the water outlet in UF pond is by middle water pump (P 5) and the water outlet of RO medicine system through security personnel's strainer and pass through RO 1High-pressure pump (P 6) enter RO 1Device, RO 1The RO of device 1Dense water discharges outward, RO 1The water outlet of device enters RO 1The pond, RO 1RO is leaded up in the water outlet in pond 2High-pressure pump (P 7), RO 2Device, RO 2Pond, MB pump (P 9) entering MB equipment, the water outlet of MB equipment enters the desalination pond, then by MB regenerative pump (P 10) enter MB equipment with the water outlet of MB regeneration medicine system, MB equipment is regenerated; RO 1Another road water outlet in pond is by softening pump (P 8) entering softening agent, the water outlet of softening agent enters the soft water pond, and the water outlet in soft water pond is by softened water pump (P 12) send softening water outside, through RO 2Device, MB equipment are to carry out desalting treatment to satisfy the requirement of boiler de-mineralized water.
2. the iron and steel comprehensive wastewater is handled the device of reuse, it is characterized in that comprising Wastewater Pretreatment part and reuse water treating part, wherein the rising pipe in filter tank and the water inlet pipe of the clean water basin in the reuse water treating part join in the Wastewater Pretreatment part, are connected in series filter back washing pump (P between the backflushing water intake pipe in filter tank and the rising pipe of clean water basin 2); The grid import in the described Wastewater Pretreatment part and the rising pipe of iron and steel comprehensive wastewater join, and the water inlet pipe of the rising pipe of grid and aeration grease removal tank joins, and meets aeration oil removing blower fan (B on the inlet pipe of aeration grease removal tank 1) escape pipe, the oil outlet pipe of aeration grease removal tank connects the oil inlet pipe of oil-water separation tank, the rising pipe of aeration grease removal tank connects the water inlet pipe of wastewater equalization pond, the rising pipe of wastewater equalization pond is by lift pump (P 1) connect the rising pipe, the water inlet pipe of settling tank of precipitation medicine system respectively, the mud pipe that advances of the sludge out pipe of settling tank and device for dehydrating sladge waste joins, the rising pipe of settling tank connects the water inlet pipe in filter tank, the backflow water inlet pipe of the rising pipe of oil-water separation tank, the rising pipe of device for dehydrating sladge waste and wastewater equalization pond joins, and meets filter back washing blower fan (B on the inlet pipe in filter tank 2) escape pipe, the filter back washing water shoot in filter tank and the backflow water inlet pipe of wastewater equalization pond join, the rising pipe in filter tank connects the water inlet pipe of clean water basin; The rising pipe of the clean water basin in the described reuse water treating part is by UF pump (P 3) join with the rising pipe of UF medicine system, the water inlet pipe of self-cleaning filter, the water inlet pipe of the rising pipe of self-cleaning filter and UF device joins, and is connected in series UF backwashing pump (P between the back flushing water inlet pipe of UF device and the rising pipe in UF pond 4), the water inlet pipe in the rising pipe of UF device and UF pond joins, and the back flushing water shoot of UF device and the backflow water inlet pipe of wastewater equalization pond join, and the rising pipe in UF pond is by middle water pump (P 5) join with security personnel's strainer, the rising pipe of RO medicine system joins with security personnel's strainer, and the rising pipe of security personnel's strainer passes through RO 1High-pressure pump (P 6) and RO 1The water inlet pipe of device joins the rising pipe of RO1 device and RO 1The water inlet pipe in pond joins, RO 1The rising pipe in pond passes through RO 2High-pressure pump (P 7) and RO 2Device joins, RO 1The rising pipe in pond is by softening pump (P 8) join RO with the water inlet pipe of softening agent 2The rising pipe and the RO of device 2The water inlet pipe in pond joins, RO 2The rising pipe in pond is by MB pump (P 9) join with the water inlet pipe of MB equipment, the water inlet pipe in the rising pipe of MB equipment and desalination pond joins, installation desalination water pump (P on the rising pipe in desalination pond 11), the rising pipe in desalination pond is by MB regenerative pump (P 10) join with the regeneration water inlet pipe of MB equipment, the rising pipe of MB regeneration medicine system and the regeneration water inlet pipe of MB equipment join, and the water inlet pipe in the rising pipe of softening agent and soft water pond joins, and softened water pump (P is installed on the rising pipe in soft water pond 12).
CN2009100281837A 2009-01-20 2009-01-20 Comprehensive treating and recycling method for steel wastewater and apparatus thereof Active CN101475269B (en)

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CN102107963B (en) * 2010-12-30 2012-09-05 天津市环境保护科学研究院 Method for treating acid-washing wastewater and metallic ions in iron and steel industry
CN102311187A (en) * 2011-07-19 2012-01-11 北京博泰盛合科技有限公司 Process for realizing zero discharge of industrial waste of steel enterprises
CN102452749B (en) * 2011-07-19 2013-06-05 北京博泰盛合科技有限公司 Process for preparing desalted water from iron and steel enterprises sewage with high conversion rate
CN102276096B (en) * 2011-07-22 2012-08-01 宝钢工程技术集团有限公司 Treatment process and treatment system of circulating water for fine cooling of surface of cold-rolled silicon steel
CN102826686B (en) * 2012-09-17 2014-07-30 山西太钢不锈钢股份有限公司 Double-membrane treatment method of iron and steel industrial wastewater
CN103466867B (en) * 2013-09-04 2014-12-31 宁波新芝华东环保科技有限公司 Integrated machine for sewage treatment
CN104671496A (en) * 2015-01-19 2015-06-03 山东国信环境系统股份有限公司 Iron phosphate rinsing water recycling device and method
CN105712517A (en) * 2016-04-11 2016-06-29 浙江碧源环保科技有限公司 Copper-containing electroplating rinse wastewater treatment system and treatment process
CN106587441A (en) * 2017-01-22 2017-04-26 天津大学 Treating and recycling device for wastewater from iron and steel enterprises and technique
CN109336297A (en) * 2018-12-13 2019-02-15 湖南大辰环保科技有限公司 High pure and ultra-fine rutile TiO2Produce waste water high-efficiency processing system and method
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