CN208684531U

CN208684531U - A kind of coking wastewater advanced treatment device

Info

Publication number: CN208684531U
Application number: CN201820728956.7U
Authority: CN
Inventors: 牛学义; 牛卉
Original assignee: Jining Fu Fu Environmental Protection Technology Co Ltd
Current assignee: Jining Fu Fu Environmental Protection Technology Co Ltd
Priority date: 2018-05-16
Filing date: 2018-05-16
Publication date: 2019-04-02
Anticipated expiration: 2028-05-16

Abstract

The utility model relates to a kind of coking wastewater deep treatment devices, belong to Treatment of Coking Effluent field, it includes preposition anoxic zone, the aerobic zone MBBR, active sludge aerobic area, postposition anoxic zone and postposition aerobic zone, wherein, preposition anoxic zone is located at the side of device longer sides, is provided with impeller in preposition anoxic zone；The aerobic zone MBBR is communicated with preposition anoxic zone by the upper half rectangle water hole hole of one end of partition wall；Active sludge aerobic area is communicated with the aerobic zone MBBR by being located at the round water hole hole being flooded not on partition wall；Postposition anoxic zone is communicated with active sludge aerobic area by the rectangle water hole hole of one end of partition wall；Postposition aerobic zone is communicated with postposition anoxic zone by the rectangle water hole hole of one end of partition wall.The utility model overcomes prior art defect not sufficiently effective in terms of COD, ammonia nitrogen and TN in depth degradation coking wastewater, can be applied to the deep biochemical processing before the bi-membrane method coking wastewater desalination for having " zero " emission request.

Description

A kind of coking wastewater deep treatment device

Technical field

The utility model relates to a kind of coking wastewater deep treatment devices, belong to Treatment of Coking Effluent field.

Background technique

Coking wastewater be coking, coal gas in the high temperature retort, purification and by-product recycling process, generate containing volatile phenol, The industrial wastewater of the heterocyclic compounds such as polycyclic aromatic hydrocarbon and oxygen, sulphur, nitrogen is a kind of high CODcr, high phenol value, high ammonia nitrogen and is difficult to locate A kind of industrial organic waste water of reason.Coking wastewater is the industrial wastewater containing a large amount of persistent organic pollutants, complicated component, Containing poisonous and harmful substances such as a large amount of phenol, cyanogen, benzene, ammonia nitrogens, the coking wastewater of discharge beyond standards causes serious pollution to environment. Coking wastewater have water quality and quantity change greatly, complicated component, organic matter especially hardly degraded organic substance content is high, ammonia nitrogen concentration height The features such as.

Coking waste water treatment process route acts on the three-stage processing work of (pretreatment+biochemical treatment+advanced treating) substantially Skill.Pretreatment workshop section includes oil removal, air bearing, precipitating etc., and main purpose is removal oil emulsion and SS and colloidal state COD.Coking wastewater Biochemical treatment workshop section can select A/0, AAO, SBR, oxidation ditch according to water quality and place situation, and water outlet can achieve state substantially Family or local discharge standard, COD, ammonia nitrogen mass concentration can generally be down to 120 mg/l and 30 mg/L, but apart from as circulation It supplements water and requires also a certain distance, advanced treating need to be carried out

Because the biochemical water quality index for influencing waste water recycling is main, there are also COD, ammonia nitrogen and TN etc., according to GB50050-2007 " Code for design of industrial recirculating cooling water treatment " regulation, recycle-water is as circulation supplement water COD, the Con trolling index of ammonia nitrogen and TDS Respectively 30mg/L, 5 mg/L and 1000mg/L；Three-stage processing of the waste water by pretreatment, biochemical treatment and advanced treating After process, brine waste bi-membrane method (i.e. ultrafiltration and reverse osmosis) desalting processing system just can enter；But it needs to pay attention to It is that reverse osmosis membrane answers strict control influent COD, BOD and ammonia nitrogen concentration as a kind of polymeric membrane, and BOD and ammonia nitrogen concentration are higher It is easy to cause growth of the microorganism on film.According to operating experience, when the feedwater quality concentration of brine waste COD and ammonia nitrogen is more than When 60 mg/l and 15 mg/l, the operation of system can be seriously affected；It is biochemical because waste water is after the secondary biochemical treatment of front It is deteriorated, B/C value is generally less than 0.2, and deep biochemical processing is needed using more efficient biomembrane process.

MBBR biomembrane has both the advantages of both conventional fluidization bed and biological contact oxidation process, is a kind of new and effective dirt Method for treating water makes suspending carrier be in fluidized state, and then is formed by the castering action of aeration and water flow in aeration tank The activated sludge of suspension growth and the biomembrane of apposition growth.

MBBR technique is because microbial biomass is big on its suspending carrier and microbial flora is abundant, it is ensured that in certain coking wastewaters Ammonia nitrogen and part are further removed compared with the COD of bio-refractory；And there is biggish advantage in terms of land occupation, but single use Traditional MBBR biomembrane process gives up for certain high ammonia nitrogens, the trade effluent of high TN and low TP, especially some high ammonia nitrogens Water, by its tradition MBBR design structure operation nitrification and denitrification mode and function can not meet its be discharged COD, ammonia nitrogen and The requirement of TN needs to improve its structure, to meet the need of certain coking wastewater influent ammonia nitrogens and the increase of TN load capacity It wants.

Utility model content

The purpose of this utility model is the deficiency for existing traditional coking wastewater deep treatment device, overcomes existing biography It is deep to provide a kind of coking wastewater for the technology of system defect not sufficiently effective in terms of COD, ammonia nitrogen and TN in depth degradation coking wastewater Processing unit is spent, can be applied to the deep biochemical processing before the bi-membrane method coking wastewater desalination for having " zero " emission request.

The technical solution of the utility model is:

A kind of coking wastewater deep treatment device comprising preposition anoxic zone, the aerobic zone MBBR, active sludge aerobic area, Postposition anoxic zone and postposition aerobic zone, wherein preposition anoxic zone is located at the side of device longer sides, is provided in preposition anoxic zone Impeller；The aerobic zone MBBR is communicated with preposition anoxic zone by the upper half rectangle water hole hole of one end of partition wall, and MBBR is good Suspending carrier has been added in oxygen area and boring aeration pipe is arranged in its bottom；Active sludge aerobic area is with the aerobic zone MBBR by being located at The round water hole hole being flooded on partition wall not communicates, reflux in the bottom setting micro-hole aerator and nitrification liquid of the aerobic zone MBBR Pump；Postposition anoxic zone is communicated with active sludge aerobic area by the rectangle water hole hole of one end of partition wall, and postposition anoxic zone is set Set blender；Postposition aerobic zone is communicated with postposition anoxic zone by the rectangle water hole hole of one end of partition wall, postposition aerobic zone Bottom is set, micro-hole aerator is set.

As one of preferred embodiment of the utility model, the aerobic zone the MBBR water intake end side walls top setting There is the area MBBR to cross water channel.

As one of preferred embodiment of the utility model, the aerobic zone MBBR water intake end side walls top The area MBBR crosses water channel and enters water water distributing trough followed by the area MBBR is provided with.

As one of preferred embodiment of the utility model, the aerobic zone MBBR is discharged side walls top setting There is the roller sieve for stopping the suspending carrier outflow aerobic zone MBBR.

As one of preferred embodiment of the utility model, it is provided with and is used at one jiao of the active sludge aerobic area Nitrification liquid is back to the interior reflux canal of preposition anoxic zone.

As one of preferred embodiment of the utility model, the postposition aerobic zone is discharged to be provided at one jiao and be used for The overflow outlet canal of device water outlet.

The utility model have following technology the utility model has the advantages that

1) due to having added efficient suspending carrier in the aerobic zone MBBR, reduce volume required for aerobic denitrification, And then the volume of preposition anoxic zone can be expanded in the case where the land occupation of total device is constant, Prepositive denitrification is enhanced to by preceding The removal of nitrate nitrogen in a large amount of coking wastewaters that face secondary biochemical effluent is brought into.

2) certain density NO has been contained in water inlet when due to coking wastewater deep treatment₃ ^-- N and lack can biology The COD of degradation, so, the preposition anoxic zone MBBR and the anoxic zone postposition MBBR can according to total nitrogen in effluent quality requirement and The concentration of biodegradable COD removes total nitrogen for denitrification to additional carbon is added in the area Liang Ge in water inlet；In addition, deep BOD concentration when degree processing in water inlet is too low, and microorganism growth and suspending carrier biofilm acquire a certain degree of difficulty, in preposition MBBR anoxic Area add carbon source be also beneficial to microorganism be grown on the suspending carrier of the aerobic zone MBBR quickly starting growth and biofilm.

3) aerobic zone MBBR water intake end side walls top, which is provided with angle top and is provided with the area MBBR, crosses water channel, the area MBBR mistake Water channel enters water water distributing trough followed by the area MBBR is provided with, and the area MBBR crosses water channel part and do not carry out water distribution to the aerobic zone MBBR, and Only the area MBBR enters water water distributing trough to the uniform water distribution in the aerobic zone MBBR, reduces the generation into the short flow phenomenon of water, also reaches To MBBR aerobic tank uniform water distribution and the purpose of cross sectional flow rate is reduced, and then blocks suspending carrier congestion in roller sieve On.

4) aeration intensity in active sludge aerobic area is lower than the aerobic zone MBBR, and preposition lack is taken in less nitrification liquid reflux to The dissolved oxygen in oxygen area, more conducively Prepositive denitrification remove TN.

5) setting in rear-mounted denitrification area and postposition aerobic zone enhances removal of the device to TN, it is ensured that denitrification is de- Nitrogen effect and water outlet TN, dissolved oxygen are met the requirements.

6) setting of reflux canal and overflow outlet canal is convenient to complete interior reflux and point water system with making device low energy consumption in System function.

Detailed description of the invention

Fig. 1 is the planar structure schematic diagram of the utility model.

Fig. 2 is the A-A sectional view of the planar structure schematic diagram of the utility model.

Fig. 3 is the B-B sectional view of the planar structure schematic diagram of the utility model.

Fig. 4 is the C-C sectional view of the planar structure schematic diagram of the utility model.

Wherein: 1, preposition anoxic zone, 2, the aerobic zone MBBR, 3, active sludge aerobic area, 4, postposition anoxic zone, 5, postposition it is good Oxygen area, 6, impeller, 7, the area MBBR cross water channel, 8, the area MBBR enter water water distributing trough, 9, boring aeration pipe, 10, suspending carrier, 11, Roller sieve, 12, micro-hole aerator, 13, reflux pump in nitrification liquid, 14, interior reflux canal, 15, blender, 16, overflow outlet canal.

Specific embodiment

The utility model is further described with example with reference to the accompanying drawing.

As shown in Figure 1, Figure 2, Figure 3 and Figure 4.

A kind of coking wastewater deep treatment device comprising preposition anoxic zone 1, the aerobic zone MBBR 2, active sludge aerobic area 3, postposition anoxic zone 4 and postposition aerobic zone 5, wherein preposition anoxic zone 1 is located at the side of device longer sides, in preposition anoxic zone 1 It is provided with impeller 6；The aerobic zone MBBR 2 passes through the upper half rectangle water hole hole phase of one end of partition wall with preposition anoxic zone 1 It is logical, suspending carrier 10 has been added in the aerobic zone MBBR 2 and boring aeration pipe 9 is arranged in its bottom；Active sludge aerobic area 3 and MBBR Aerobic zone 2 is communicated by being located at the round water hole hole being flooded not on partition wall, and micro-pore aeration is arranged in the bottom of the aerobic zone MBBR 2 Reflux pump 13 in device 12 and nitrification liquid；Water is crossed by the rectangle of one end of partition wall with active sludge aerobic area 3 in postposition anoxic zone 4 Hole communicates, and blender 15 is arranged in postposition anoxic zone 4；Postposition aerobic zone 5 passes through the rectangular of one end of partition wall with postposition anoxic zone 4 Shape water hole hole communicates, and postposition aerobic zone 4 is arranged bottom and micro-hole aerator 12 is arranged.

Above-mentioned 2 water intake end side walls top of the aerobic zone MBBR is provided with the area MBBR and crosses water channel 7；The above-mentioned aerobic zone MBBR 2 enters The area MBBR on water end (W.E.) side walls top crosses water channel 7 and enters water water distributing trough 8 followed by the area MBBR is provided with, and the area MBBR crosses 7, water channel Divide and water distribution is not carried out to the aerobic zone MBBR 2, and the only area MBBR enters water water distributing trough 8 to the uniform water distribution in the aerobic zone MBBR, reduces The generation of the short flow phenomenon of water inlet.

The above-mentioned aerobic zone MBBR 2 is discharged a side walls top and is provided with for stopping suspending carrier 10 to flow out the aerobic zone MBBR 2 roller sieve 11, suspending carrier 10, which is intercepted in the aerobic zone MBBR 2, persistently generates biomembrane, and muddy water can continuously flow into rolling Shaft screen net 11 simultaneously enters active sludge aerobic area 3 by the circular hole on partition wall.

The interior reflux that preposition anoxic zone 1 is back to for nitrification liquid is provided at 3 one jiaos of above-mentioned active sludge aerobic area Nitrification liquid is promoted to interior reflux canal 14, is then flowed into from interior reflux canal 14 by canal 14, the interior reflux pump 13 in active sludge aerobic area 3 Preposition anoxic zone 1.

Above-mentioned postposition aerobic zone 5 is discharged the overflow outlet canal 16 being provided at one jiao for device water outlet, and muddy water is from postposition 5 overflow of aerobic zone flows out the present apparatus from overflow outlet canal 16 to overflow outlet canal 16.

The workflow of the utility model are as follows:

1) it is flowed into respectively by water inlet line to the waste water of advanced treating by water inlet line and sludge sludge originally practical The preposition anoxic zone of new device is mixed in anoxic zone with the nitrification liquid to come from the reflux of active sludge aerobic area, will The NO brought into the second stage of biochemical treatment water outlet₃ ^-- the N and NO to come from the reflux of active sludge aerobic area₃ ^-The removal of-N denitrification, such as It needs to add NO in lovely preposition anoxic zone₃ ^-Carbon source needed for-N denitrification.

2) muddy water after preposition anoxic zone biochemical reaction flows through the setting of the aerobic zone MBBR water intake end side walls top Water channel is crossed in the area MBBR, enters water water distributing trough immediately in the area MBBR that water channel is crossed in the area MBBR flowing to；In order to reduce the short stream into water The generation of phenomenon, the area MBBR crosses water channel part and does not carry out water distribution to the aerobic zone MBBR, and only the area MBBR enters water water distributing trough pair The uniform water distribution in the aerobic zone MBBR.

3) under the action of bottom perforated aeration tube, muddy water and suspending carrier in the aerobic zone MBBR be sufficiently mixed and Fluidisation further completes the removal and Ammonia Nitrification reaction of the biodegradable COD of remainder in the rear aerobic area MBBR；It suspends Carrier persistently generates biomembrane by the interception of roller sieve in the aerobic zone MBBR, and muddy water flows into rotary screen after the reaction of the aerobic zone MBBR Net, and active sludge aerobic area is entered by the round water hole hole on partition wall；In addition, the interior reflux in active sludge aerobic area Pump promotes nitrification liquid to interior reflux canal, then flows into preposition anoxic zone from interior reflux canal and carries out denitrification removal TN.

4) muddy water in active sludge aerobic area further biodegrade COD and ammonia under micro-hole aerator oxygenation are flowed into Nitrogen, the aeration intensity in active sludge aerobic area are lower than the aerobic zone MBBR, and the molten of preposition anoxic zone is taken in less nitrification liquid reflux to Oxygen is solved, the muddy water after reaction flows to postposition anoxic zone；Additional carbon can be added in postposition anoxic zone, into one under blender mixing It walks denitrification and removes TN；Muddy water after rear-mounted denitrification flows into postposition aerobic zone, and further oxygenation and removal postposition anoxic zone are residual The additional carbon stayed, the muddy water after reaction flow out the present apparatus from the overflow of postposition aerobic zone to overflow outlet canal, from overflow outlet canal.

Example one:

Shandong Coking Plant Wastewater advanced treating engineering, needing the wastewater flow rate of advanced treating is 2400m3/ days, into this The water COD concentration that enters of utility model device be 130mg/L, BOD concentration be 20mg/L, NH4-N concentration is that 20mg/L, TN are 100mg/L, TP 0.3mg/L belong to by the pretreated high ammonia nitrogen of front traditional active sludge biochemical process and TN and low The coking wastewater of COD.Use the utility model, the cylindrical type suspending carrier feature of addition are as follows: material HDPE, specific gravity are 0.96g/cm3, diameter 25mm, high 10mm, porosity of=83%, bulk density >=100kg/m3, effective ratio area >=500 ㎡/m³；The measure that there is the rotary screen net of use anti-filler to block in its vicinity guarantees suspending carrier not on its cross-section of river Accumulation.The aerobic zone MBBR of device removes COD and ammonia nitrogen in water inlet for aerobic denitrification, is provided with boring aeration in area Pipe, is provided with the suspending carrier of 35% filling rate, and the basin's effective volume of the aerobic zone diameter 25mm, MBBR of filler is 540m3, HRT For 5.4h, the dosage of suspending carrier is 189m3, starts the initial stage of starting after Facilities Construction completion, tames for fast culture Sludge, biomembrane and the ability for solving system removal COD, inflow is larger, and the overload operation in this stage can also investigate facility Starting rapidity and impact resistance, facility starting two weeks, COD removal rate has stably reached 45%；After facility starting about four weeks The reinforcing of biomembrane is basically completed, so the nitrification of biomembrane is prominent by operating parameters such as the dissolved oxygen of control device, PH Out, after two months, ammonia nitrogen, which is presented, stablizes rapid decrease trend, and ammonia nitrogen satisfaction water outlet is discharged after four months and is required, that is, the BOD being discharged ≤ 10mg/L is discharged COD≤50mg/L, NH3-N≤1mg/L, TN≤15mg/L, meets (i.e. super into brine waste bi-membrane method Filter and reverse osmosis) influent quality of desalting processing system requirement.

It should be noted that any equivalent way made by those skilled in the art under the guidance of this specification, or Obvious variant should be within the protection scope of the present utility model.

Claims

1. a coking wastewater advanced treatment device, is characterized in that, it comprises pre-anoxic zone, MBBR aerobic zone, activated sludge aerobic zone, post-anoxic zone and post-aerobic zone; pre-anoxic zone; The area is located on one side of the longer side of the device, and the pre-anoxic area is provided with a flow pusher; the MBBR aerobic area and the pre-anoxic area are connected through the upper half of the rectangular water-passing hole at one end of the partition wall, and the MBBR aerobic area Suspended carrier is added in the zone and perforated aeration pipes are set at the bottom; the activated sludge aerobic zone and the MBBR aerobic zone are connected through the circular water-passing holes submerged in water on the partition wall, and the bottom of the MBBR aerobic zone is set Microporous aerator and nitrifying liquid internal return pump; the post anoxic zone and the activated sludge aerobic zone are connected through the rectangular water passage hole at one end of the partition wall, and the post anoxic zone is provided with a stirrer; the post aerobic zone It communicates with the rear anoxic zone through the rectangular water passage hole at one end of the partition wall, and the rear aerobic zone is provided with a microporous aerator at the bottom.

2 . The advanced coking wastewater treatment device according to claim 1 , wherein the MBBR zone water-passing channel is arranged on the upper part of the wall of the water inlet end side of the MBBR aerobic zone. 3 .

3 . The advanced treatment device for coking wastewater according to claim 1 , wherein the MBBR zone inlet water distribution tank is immediately arranged behind the MBBR zone water passage on the upper part of the water inlet end side wall of the MBBR aerobic zone. 4 .

4 . The advanced coking wastewater treatment device according to claim 1 , wherein the upper part of the wall on the water outlet side of the MBBR aerobic zone is provided with a drum screen for preventing the suspended carrier from flowing out of the MBBR aerobic zone. 5 .

5 . The advanced coking wastewater treatment device according to claim 1 , wherein an internal return channel for returning the nitrification solution to the pre-anoxic zone is provided at a corner of the activated sludge aerobic zone. 6 .

6 . The advanced treatment device for coking wastewater according to claim 1 , wherein an overflow drain for water outlet is provided at a corner of the water outlet of the rear aerobic zone. 7 .