CN209193669U - Low dosage and high-recovery steel mill comprehensive sewage treatment system - Google Patents

Abstract

The utility model provides a kind of low dosage and high-recovery steel mill comprehensive sewage treatment system, conditioning tank, it is efficiently heavy to divide device, neutralization reaction pond, V-type filter tank, intermediate pool, self-cleaning filter, ultrafiltration apparatus, ultrafiltration water tank, No.1 cartridge filter, No.1 enrichment facility, it is sequentially communicated between reuse pool by pipeline, No.1 enrichment facility is exported equipped with No.1 concentrated water, the outlet of No.1 concentrated water is passed through in No.1 concentrated water pond by pipeline, it is efficiently heavy that device is divided to include rapidly miscible pool, flocculation tank, precipitation and separation pond, precipitation and separation bottom of pond portion is equipped with mud-removing bucket, mud-removing bucket top is equipped with elevator pump, elevator pump is connected to rapidly miscible pool by pipeline, mud-removing bucket bottom is exported equipped with spoil disposal, spoil disposal outlet is connected to sludge reservoir by pipeline.By the sludge reflux with catalyst property in the utility model, enhance the activity and sedimentation effect of floccule body, saves flocculation agent；Increase the rate of recovery of system.

Description

Low dosage and high-recovery steel mill comprehensive sewage treatment system

Technical field

The utility model relates to a kind of steel mill's sewage disposal system and its processing methods, and in particular to a kind of low dosage and High-recovery steel mill comprehensive sewage treatment system.

Background technique

It is common processing mode of the current major iron and steel enterprise for trade effluent that recycle-water, which is made, using trade effluent；Mesh It is preceding mainly recycle-water be made to be used to produce after trade effluent collection processing；Trade effluent passes through conventional water treatment process (such as Coagulation, precipitating, oil removing, filtering etc.) processing after recycle-water is made, suspended matter, impurity in former trade effluent etc. are had The removal of effect, but there is no reductions for its salt content, therefore the salt content in recycle-water is much higher than industrial net circulating water and turbid circulation Water.In view of quality of reused water feature, therefore it is only used for the direct current spray slag of the technique units such as sintering, ironmaking, steel-making, steel rolling or pours Terrace etc. is spilt, can not be as the supplement water of circulation, and the water consumption that direct current spray slag or pour spills this part of terrace is Fairly limited.Therefore by the further advanced treating of whole trade effluents, take desalinating process that industrial fresh water is made, it has also become work The development trend of industry water reuse.But flocculation agent used is more in the prior art, and at high cost, Sewage treatment rate is low.

Utility model content

Purpose of utility model: the purpose of this utility model is that in view of the deficiencies of the prior art, providing a kind of low dosage With high-recovery steel mill comprehensive sewage treatment system.

Technical solution: in order to reach above-mentioned purpose of utility model, the utility model is such completion: low dosage and High-recovery steel mill comprehensive sewage treatment system, including conditioning tank, efficient sink divide device, neutralization reaction pond, V-type filter tank, intermediate water Pond, self-cleaning filter, ultrafiltration apparatus, ultrafiltration water tank, No.1 cartridge filter, reverse osmosis unit, No.1 concentrated water pond, recycle-water Pond；Conditioning tank efficiently sinks and divides device, neutralization reaction pond, V-type filter tank, intermediate pool, self-cleaning filter, ultrafiltration apparatus, ultrafiltration water Case, No.1 enrichment facility, is sequentially communicated between reuse pool No.1 cartridge filter by pipeline, and No.1 enrichment facility is equipped with The outlet of No.1 concentrated water, the outlet of No.1 concentrated water are passed through in No.1 concentrated water pond by pipeline, efficiently heavy that device is divided to include rapidly miscible pool, wadding Solidifying reaction tank, precipitation and separation pond, precipitation and separation bottom of pond portion are equipped with mud-removing bucket, and mud-removing bucket top is equipped with elevator pump, and elevator pump passes through Pipeline is connected to rapidly miscible pool, and mud-removing bucket bottom is exported equipped with spoil disposal, and spoil disposal outlet is connected to sludge reservoir by pipeline.Intermediate water The water in pond is promoted to self-cleaning filter by ultrafiltration feed pump and ultrafiltration apparatus goes most suspended substances, organic pollution in water removal Object etc. retains small particle, reduces bacterium and turbidity, provides reliable guarantor for the safe and stable operation of subsequent counter-infiltration system Barrier；The higher and loose sludge of mud-removing bucket upper active is flowed back, the activity and sedimentation effect of floccule body are enhanced, is saved poly- Solidifying agent, mud-removing bucket active lower is weaker and the mud discharging of consolidation, reduces the project amount of subsequent sludge condensation.

Further, the No.1 enrichment facility is reverse osmosis unit, increases the rate of recovery of system, and salt content drops It is low.

It further, further include No. two enrichment facilities, No. two enrichment facilities are connected to No.1 concentrated water pond by pipeline, further The rate of recovery of increase system.

Further, No. two enrichment facilities include No. two cartridge filters, high-pressure pump, No. two reverse osmosis units, two Number concentrated water pond, No. two cartridge filters, high-pressure pump, No. two be sequentially communicated between reverse osmosis unit, reuse pool by pipeline, two Number enrichment facility is equipped with No. two concentrated waters outlets and is passed through No. two concentrated water ponds.

It further, further include sludge dehydration device, sludge reservoir, sludge dehydration device, conditioning tank are sequentially communicated.It will be dirty Pressure filtration yielding water in mud flows back, and further increases the rate of recovery of system.

It further, further include back purge system, back purge system is connected to V-type filter tank and ultrafiltration apparatus；V-type filter tank and super Filter device respectively sets one outlet connection conditioning tank；Periodically V-type filter tank is backwashed, is just washed, air water is with washing, periodically to ultrafiltration Device carries out backwash, is just washing.

Further, ultrafiltration apparatus uses external pressure type ultra-filtration membrane component, easy to operate, easy cleaning.

Further, the Sewage treatment rate of No.1 enrichment facility is 75%.

Further, the Sewage treatment rate of No. two enrichment facilities is 50%.

The utility model has the beneficial effects that the utility model has the advantages that compared with traditional technology

1, the sludge with catalyst property is flowed back in the utility model, enhances the activity and precipitating effect of floccule body Fruit can save flocculation agent 30% or so, so that amount of consumption of drugs be made to substantially reduce；

2, the rate of recovery for further increasing system using concentration technology is carried out again to first-stage reverse osmosis concentrated water；

3, the cycling and reutilization of water resource may be implemented in the sewage of the steel plant after advanced treating, mainly also The utilization rate for water can be not only effectively increased, but also the main body of equipment can be made to reduce as recirculated cooling water The degree corroded.

Detailed description of the invention

Fig. 1 is the schematic diagram of low dosage and high-recovery steel mill comprehensive sewage treatment system.

Specific embodiment

Embodiment 1: as shown in Figure 1, low dosage and high-recovery steel mill comprehensive sewage treatment system, including conditioning tank 1, It is efficiently heavy to divide device 2, neutralization reaction pond 5, V-type filter tank 6, intermediate pool 7, self-cleaning filter 8, ultrafiltration apparatus 9, ultrafiltration water tank 10, No.1 cartridge filter 11, No.1 reverse osmosis unit 12, No.1 concentrated water pond 13, reuse pool 14, No. two enrichment facilities, dirt Mud dehydration device 4, back purge system 18, conditioning tank 1, it is efficiently heavy divide device 2, neutralization reaction pond 5, V-type filter tank 6, intermediate pool 7, Self-cleaning filter 8, ultrafiltration apparatus 9, ultrafiltration water tank 10, No.1 cartridge filter 11, No.1 enrichment facility 12, reuse pool 14 Between be sequentially communicated by pipeline, No.1 reverse osmosis unit 12 is exported equipped with No.1 concentrated water, and the outlet of No.1 concentrated water is logical by pipeline Enter in No.1 concentrated water pond 13, No. two enrichment facilities are connected to No.1 concentrated water pond 13 by pipeline, and No. two enrichment facilities include No. two guarantors Pacify filter 15,16, No. two high-pressure pump, No. two reverse osmosis units concentrated water ponds 17,15, No. two reverse osmosis dresses of No. two cartridge filters It sets and is sequentially communicated between 16, reuse pool 14 by pipeline, No. two enrichment facilities are equipped with No. two concentrated water outlets and are passed through No. two concentrated waters Pond 17；Efficiently heavy that device 2 is divided to include rapidly miscible pool 21, flocculation tank 22, precipitation and separation pond 23,23 bottom of precipitation and separation pond is set There is mud-removing bucket, mud-removing bucket top is equipped with elevator pump, and elevator pump is connected to rapidly miscible pool 21 by pipeline, and mud-removing bucket bottom is equipped with row Mud outlet, spoil disposal outlet are connected to sludge reservoir 3 by pipeline；Back purge system 18 is connected to V-type filter tank 6 and ultrafiltration apparatus 9；V-type Filter tank 6 respectively sets one outlet with ultrafiltration apparatus 9 and is connected to conditioning tank 1；Ultrafiltration apparatus 9 uses external pressure type ultra-filtration membrane component；No.1 is dense The Sewage treatment rate of compression apparatus is 75%；The Sewage treatment rate of No. two enrichment facilities is 50%.

Embodiment 2: when operation, raw material area, steel mill, sintering zone, pelletizing area, BF Area, the area Zhi Yang, steel-making, continuous casting zone, line Whole audience stain disease uniform water quality, water in conditioning tank 1 such as bar area, power generation plant area (containing desalted water station), softening water station, the area Gong Fu It is lifted into efficiently to sink through raw water pump pressurization after amount and divide in the rapidly miscible pool 21 in device, feeding lime or soda ash adjust pH to 9- Aluminium polychloride is added after 10.5 and carries out coagulating sedimentation, the dosage of aluminium polychloride is 10-20kg/ kiloton waste water；Coagulation is heavy Water behind shallow lake enters the efficiently heavy flocculation tank 22 divided in device and flocculation reaction, the throwing of polyacrylamide occur for polyacrylamide Dosage is 20-50kg/ kiloton waste water, and the waste water stream after a large amount of alumen ustum of flocculation generation divides the precipitation and separation pond 23 in device to efficiently heavy Mud-water separation is carried out, after muddy water is completely separated, the sludge that precipitation and separation pond 23 generates passes through the elevator pump one on mud-removing bucket top It is partly refluxed to rapidly miscible pool 21, another part is discharged into after sludge reservoir 3 from mud-removing bucket lower part outlet again by sludge lifting pump It is promoted to sludge dehydration device and carries out solid-liquid separation treatment, mud cake is transported outward, and pressing filtering liquid is flow to conditioning tank 1 after separation of solid and liquid and is carried out Circular treatment；It is efficiently heavy that device 2 is divided to be the synthesis of " mixing cohesion, flocculation reaction, precipitation and separation " three units, i.e., mixing Closely series connection is formed as an organic whole in the plane for area, flocculation zone, settling zone.It is efficiently heavy that the discharge water of device 2 is divided to drain into Neutralization reaction pond 5 after adding acid for adjusting pH value to neutrality, flows into the further filtration treatment in V type filter tank 6 using gravity, filters out useless The filtering water outlet in V-type filter tank is discharged into intermediate pool buffering water quality and quantity after suspended matter in water；V-arrangement filter tank 6 is rapid filter A kind of form because its intake groove shape be in the shape of the letter V and gain the name, V-type filter tank 6 produce water gravity flow enter 7 buffered water of intermediate pool Matter water, back purge system 18, which periodically backwashes V-type filter tank 6, just washes, air water is same washes；V-type filter tank 6 backwashes, just It washes, air water enters conditioning tank 1 with the draining gravity flow washed and carries out circular treatment.The water of intermediate pool 7 is promoted to by ultrafiltration feed pump Most suspended substances, organic pollutant etc. in water removal are removed into ultrafiltration apparatus 9 again after self-cleaning filter 8, retains small Grain reduces bacterium and turbidity, provides reliable guarantee for the safe and stable operation of subsequent counter-infiltration system；Ultrafiltration apparatus 9 uses External pressure type ultra-filtration membrane component, easy to operate, easy cleaning, ultrafiltration produce water and enter the buffering water of ultrafiltration water tank 10；Hyperfiltration reverse-rinsing, just Wash, cross-flow draining gravity flow enter conditioning tank 1, it is reprocessed.Ultrafiltration water tank 10 is discharged by raw water reverse osmosis feedwater pump And after high-pressure pump boosting, enter after No.1 cartridge filter 11 further filtering No.1 reverse osmosis unit 12 carry out it is primary dense Contracting, the rate of recovery are up to 75%, No.1 reverse osmosis unit 12 can remove most dissolved salts in water, small organic molecule and The pollutants such as silica produce water and reach Standard of reclaimed water in " Code for design of industrial recirculating cooling water treatment ", and No.1 is anti- Permeability apparatus 12 produces water and enters reuse pool 14, is periodically delivered to plant area's water spot, the reverse osmosis dress of No.1 by reuse pool 14 The concentrated water for setting 12 is discharged into No.1 concentrated water pond 13.The concentrated water in No.1 concentrated water pond 13 is promoted to No. two 15 depth of cartridge filter by pump Filtration treatment, then by concentrated water counter-infiltration system high-pressure pump be forced into corresponding operating pressure into No. two reverse osmosis units 16 into The processing of row secondary concentration；The production water of No. two reverse osmosis units 16 enters reuse pool 14, the concentrated water drainage of No. two reverse osmosis units 16 Enter concentrated water pond 2 17；The water of reuse pool 14 is delivered to plant area's water spot by reuse water pump, and the concentrated water in No. two concentrated water ponds 17 carries out Blast furnace slag flushing.

Claims (7)

1. low dosage and high-recovery steel mill comprehensive sewage treatment system, including conditioning tank, efficient sink divide device, neutralization reaction Pond, V-type filter tank, intermediate pool, self-cleaning filter, ultrafiltration apparatus, ultrafiltration water tank, No.1 cartridge filter, reverse osmosis unit, No.1 concentrated water pond, reuse pool, which is characterized in that conditioning tank, it is efficiently heavy divide device, neutralization reaction pond, V-type filter tank, intermediate pool, Self-cleaning filter, ultrafiltration water tank, No.1 cartridge filter, No.1 enrichment facility, passes through pipe between reuse pool at ultrafiltration apparatus Road is sequentially communicated, and No.1 enrichment facility is exported equipped with No.1 concentrated water, and the outlet of No.1 concentrated water is passed through in No.1 concentrated water pond by pipeline, Efficiently heavy that device is divided to include rapidly miscible pool, flocculation tank, precipitation and separation pond, precipitation and separation bottom of pond portion is equipped with mud-removing bucket, spoil disposal Top struggle against equipped with elevator pump, elevator pump is connected to rapidly miscible pool by pipeline, and mud-removing bucket bottom is exported equipped with spoil disposal, spoil disposal outlet Sludge reservoir is connected to by pipeline.

2. low dosage according to claim 1 and high-recovery steel mill comprehensive sewage treatment system, which is characterized in that institute Stating No.1 enrichment facility is reverse osmosis unit.

3. according to claim low dosage according to claim 1 and high-recovery steel mill comprehensive sewage treatment system, It is characterized in that, further including No. two enrichment facilities, No. two enrichment facilities are connected to No.1 concentrated water pond by pipeline.

4. according to claim low dosage according to claim 3 and high-recovery steel mill comprehensive sewage treatment system, It is characterized in that, No. two enrichment facilities include No. two cartridge filters, high-pressure pump, No. two reverse osmosis units, No. two concentrated waters Pond, No. two cartridge filters, high-pressure pump, No. two be sequentially communicated between reverse osmosis unit, reuse pool by pipeline, No. two concentration Device is equipped with No. two concentrated water outlets and is passed through No. two concentrated water ponds.

5. low dosage according to claim 1 and high-recovery steel mill comprehensive sewage treatment system, which is characterized in that also Including sludge dehydration device, sludge reservoir, sludge dehydration device, conditioning tank are sequentially communicated.

6. low dosage according to claim 1 and high-recovery steel mill comprehensive sewage treatment system, which is characterized in that also Including back purge system, back purge system is connected to V-type filter tank and ultrafiltration apparatus；V-type filter tank and ultrafiltration apparatus respectively set one outlet It is connected to conditioning tank.

7. low dosage according to claim 1 and high-recovery steel mill comprehensive sewage treatment system, which is characterized in that super It filters device and uses external pressure type ultra-filtration membrane component.