CN206580707U - A kind of coking chemical waste water total system - Google Patents

Abstract

The utility model discloses a kind of coking chemical waste water total system, including the pretreating process section being linked in sequence, biochemical processing process section and advanced treatment process section, the pretreating process section includes grease removal tank and the regulating reservoir being connected with grease removal tank, the advanced treatment process section includes the coagulation reaction tank being linked in sequence, pond after coagulative precipitation tank and processing, the biochemical processing process section includes receiving the anaerobic pond of regulating reservoir water, preaeration tank, anoxic feed well, anoxic pond, Aerobic Pond, precipitate separate tank and biological fluidized bed, precipitation separate tank is divided into the first heavy pond and second pond；The utility model provides processing coke-oven plant's distilled ammonia wastewater, gas liquor water shutoff and whole cold water；Methanol residual night, sanitary sewage, handle water outlet up to standard and are digested inside coke-oven plant or steel plant.Make waste water reclaiming, save substantial amounts of new water resource, solve the realistic problem of coking or iron and steel enterprise by regional water shortage, and also thoroughly solve the water pollution problems of enterprise, reach energy-saving and emission-reduction, the purpose of environmental protection.

Description

A kind of coking chemical waste water total system

Technical field

The utility model is related to a kind of coking chemical waste water total system.

Background technology

Organic matter in coking chemical waste water and ammonia nitrogen concentration are high, bio-toxicity is big, be difficult to degrade, and are the larger industry of intractability One of waste water.（1）Complicated component:Coking chemical waste water composition is complicated, and pollutant contained therein can be divided into inorganic pollution and have The major class of organic pollutants two.Inorganic pollution is general to be existed in the form of money salt, organic matter in addition to phenolic compound, in addition to Aliphatic compound, heterocycle compound and polycyclic aromatic hydrocarbon etc..Wherein based on phenolic compound, account for total organic matter 85% is left It is right；（2）Containing substantial amounts of difficult degradation thing, biodegradability is poor:Organic matter (in terms of COD) content is high in coking chemical waste water, and Because contained organic matter is generally that aromatic compound and fused ring compound and crying is paid attention to, adjoins the heterocyclic compound such as steep in waste water, its BOD5/COD values are low, and generally 0.3-0.4, organic matter is stable, and microorganism is difficult by, and the biodegradability of waste water is poor； （3）Wastewater toxicity is big:Wherein cyanide, aromatic ring, condensed ring, heterocyclic compound are all to the toxic effect of microorganism, and some are even Concentration in waste water exceedes the tolerable limit of microorganism；（4）Containing harm aquatile and human body it is hypertoxic and carcinogenic Material:Major pollutant is loop chain organic compound, azido compound and ammonia nitrogen etc..Therefore, coking chemical waste water is to nature Ecological destruction and its serious, the threat to the mankind is huge.

At present, the processing method of coking chemical waste water mainly has physico-chemical process, biochemical process and materialization-biochemistry method for combined use.Materialization Method mainly has absorption, coagulating sedimentation, light electrolysis, electrolysis, catalysis oxidation etc..It is simple by physico-chemical process Treatment of Wastewater in Coking cost compared with Height, its pretreatment for being currently used primarily in coking chemical waste water or advanced treating.Biochemical process because with processing cost it is low, without secondary dirt Dye etc. the characteristics of and as current Treatment of Coking Effluent main method.Wherein conventional activated sludge process can effectively remove useless Phenol and cyanogen class material in water, but its adaptability changed to influent quality water is relatively low, at hardly degraded organic substance and ammonia nitrogen Manage poor effect, it is difficult to reach discharge standard.

The content of the invention

The purpose of this utility model is to provide a kind of coking chemical waste water total system, by biochemical processing process section Increase the preaeration tank and biological fluidized bed set, last waste water can reach discharging standards.

The purpose of this utility model is achieved through the following technical solutions：

A kind of coking chemical waste water total system, including be linked in sequence pretreating process section, biochemical processing process section and Advanced treatment process section, the pretreating process section includes grease removal tank and the regulating reservoir being connected with grease removal tank, the advanced treating Process section includes pond after the coagulation reaction tank, coagulative precipitation tank and the processing that are linked in sequence, wherein, the biochemical processing process section Anaerobic pond, preaeration tank, anoxic feed well, anoxic pond, Aerobic Pond, precipitation separate tank and biology including receiving regulating reservoir water Fluid bed, precipitation separate tank is divided into the first heavy pond and second pond；Pending waste water in regulating reservoir is detested through the connection of anaerobism water pump Oxygen pond, anaerobic pond water outlet connects preaeration tank through overfall, and preaeration tank bottom sets aeration pump, after being handled through preaeration tank Waste water enters the first heavy pond precipitation through overfall, the first heavy pond bottom is provided with sludge recovery pump, sludge recovery pump connects respectively It is connected to aeration tank water inlet end and a sludge treater, the overfall connection anoxic feed well that the first heavy pond top is set, anoxic Elevator pump is provided with feed well, the water in anoxic feed well is lifted into anoxic pond by elevator pump, is given up after being handled through anoxic pond Water enters Aerobic Pond, and Aerobic Pond water inlet end and middle part are provided with medicine dispensing port, medicine dispensing port and a medicine delivery device Connection, Aerobic Pond delivery port connection second pond, the overfall of the top setting of second pond is divided into first outlet and second and gone out Mouthful, backflow well is connected to anoxic feed well, second outlet connection by the water pump that first outlet is connected in a backflow well, backflow well One intermediate pool, the precipitating sludge of second pond is back in Aerobic Pond and preaeration tank through sludge reflux pump, while sludge Reflux pump is also connected with sludge treater, and intermediate pool connects biological fluidized bed by water pump, is provided with biological fluidized bed water inlet end Nutrient solution adds input pipe, and the water side of biological fluidized bed and the water inlet end of biological fluidized bed connect to be formed by a check valve Interior backflow, the water side of biological fluidized bed connects the coagulation reaction tank of the advanced treatment process section simultaneously.

Scheme is further：Propeller type mechanical stirring device is provided with the anoxic pond.

Scheme is further：The sludge treater is plate and frame filter press.

The beneficial effects of the utility model are：There is provided the processing system of a set of coking chemical waste water, the utility model is mainly located Manage coke-oven plant's distilled ammonia wastewater, gas liquor water shutoff and whole cold water；Methanol residual night, sanitary sewage, handle water outlet up to standard in coke-oven plant Or digested inside steel plant.Make waste water reclaiming, save substantial amounts of new water resource, solve coking or iron and steel enterprise by regional water The realistic problem of shortage of resources, and the water pollution problems of enterprise is also thoroughly solved, reach energy-saving and emission-reduction, the mesh of environmental protection 's.

Below in conjunction with the accompanying drawings and embodiment is described in further detail to the utility model.

Brief description of the drawings

Fig. 1 is the utility model system architecture diagram.

Embodiment

Gradually cause the attention of people simultaneously in order to removal ammonia nitrogen and organic matter, in recent years, biological denitrification process simultaneously Gradually turn into the main method of Treatment of Coking Effluent, by the present embodiment can using anoxic-aerobic (A/O) or anaerobism- Anoxic-aerobic (A1-A2-O) activated sludge process, along with the advanced treating of coagulating sedimentation, last waste water can reach national row Put standard.

Therefore, a kind of coking chemical waste water total system, as shown in Figure 1：The coking chemical waste water total system includes Pretreating process section 1, biochemical processing process section 2 and the advanced treatment process section 3 being linked in sequence, the pretreating process section include Grease removal tank 101 and the regulating reservoir 102 being connected with grease removal tank, the advanced treatment process section include the coagulation reaction tank being linked in sequence 301st, pond 303 after coagulative precipitation tank 302 and processing, wherein, biochemical processing process section includes receiving regulating reservoir water Anaerobic pond 201, preaeration tank 202, precipitation separate tank, anoxic feed well 204, anoxic pond 205, Aerobic Pond 206 and organism fluidization Bed 210, precipitation separate tank is divided into the first heavy pond 203 and second pond 207；Pending waste water in regulating reservoir is through anaerobism water pump 4 Anaerobic pond 201 is connected, anaerobic pond water outlet connects preaeration tank 202, preaeration tank through overfall（I.e. aeration intensity is relative to routine Aeration tank is lower）Bottom sets aeration pump 202-1, and aeration pump is handled apart from 20 centimetres of preaeration tank bottom through preaeration tank Waste water afterwards enters the first heavy pond 203 through overfall and precipitated, and the first heavy pond bottom is provided with sludge recovery pump 5, sludge is reclaimed Pump is respectively connecting to aeration tank water inlet end and a sludge treater 8 by the control of valve 6 and 7, what the first heavy pond top was set It is provided with elevator pump 9 in overfall connection anoxic feed well 204, anoxic feed well, elevator pump is by the water extraction in anoxic feed well Rise and enter anoxic pond 205, Aerobic Pond 206 is entered by feed pump 10 through anoxic pond processed waste water, Aerobic Pond water inlet end is with Portion is provided with medicine dispensing port 11, and medicine dispensing port is connected with a medicine delivery device 12, Aerobic Pond delivery port connection second Heavy pond 207, the overfall that the top of second pond is set is divided into first outlet 207-1 and second outlet 207-2, and first outlet connects Connect the water pump 12 in a backflow well 208, backflow well and backflow well is connected to anoxic feed well 204, second outlet connects one Intermediate pool 209, the precipitating sludge of second pond is back to Aerobic Pond and pre- through sludge reflux pump 13 by valve 14,15 and 16 In aeration tank and sludge treater, intermediate pool connects biological fluidized bed 210 by water pump 17, set in biological fluidized bed water inlet end It is equipped with nutrient solution addition input pipe, input pipe connection nutrient solution tank 18, the water side of biological fluidized bed and biological fluidized bed Water inlet end by the connection of check valve 19 formed in flow back, the water side of biological fluidized bed connects the advanced treating simultaneously The coagulation reaction tank of process section.

Wherein：Propeller type mechanical stirring device is provided with the anoxic pond.The sludge treater is sheet frame pressure Filter.

In embodiment：Waste water is lifted into grease removal tank by well through pump group, enters regulating reservoir regulating pondage through airfloat equipment And through anaerobism water pump enter anaerobic pond after water quality.Anaerobic pond water outlet enters preaeration tank, preaeration tank bottom aeration, through preaeration Pond processed waste water is precipitated at the beginning of entering the first heavy pond, and partial concentration sludge reflux to the preaeration tank of the first heavy pond bottom is intake End, remainder carries out sludge treater.First heavy pond top clarified solution enters anoxic feed well, through anoxic elevator pump by water extraction Rise to enter in anoxic pond, anoxic pond and set mechanical stirring device, enter Aerobic Pond through mechanical agitation anoxic pond processed waste water, it is aerobic Pond water inlet end, middle part add Na2CO3 and NaH2PO4 by mouth of offeing medicine, and Aerobic Pond water outlet enters second pond, through second pond After precipitation separation, the top clarified solution of second pond is partly into backflow well, and anoxic pond feed well is flow to through blowback, its remaining part Divide and enter intermediate pool, the partly precipitated sludge of second pond is back in Aerobic Pond and preaeration tank through sludge reflux pump, remain Remaining sludge carries out sludge treater.The water of intermediate pool enters HOKTOC biological fluidized beds, biological fluidized bed water inlet end by pump again The nutrient solution of configuration is added, the water side part water outlet of biological fluidized bed needs to be back to biological fluidized bed through air lift lifter Water inlet end flows back in carrying out, and the residue water outlet of biological fluidized bed water side enters coagulation reaction tank, and reaction tank needs to add flocculant PAL, flocculation aid PAM etc. carry out coagulating sedimentation, and the sludge of sedimentation basin carries out sludge treatment technique, the water that supernatant enters after processing Pond, reuse is carried out by pump group.

By the handling process of the coking chemical waste water of the present embodiment system can realize pretreatment backflow, nitrification liquid it is big backflow, Flowed back in the big backflow of sludge, HOKTOC, it is possible to achieve pretreatment reaction groove, air supporting dosing, biochemical dosing, biochemical dosing, HOK- TOC dosings, coagulation dosing and Treatment of Sludge dosing, system anti-impact force are strong, and water outlet COD and ammonia nitrogen after processing can be same When reach national sewage comprehensive emission standard (GB9878-1996) primary standard.Technique undergoes anaerobism, anoxic and aerobic repeatedly Area, carries out thoroughly denitrification-nitration reaction, COD, ammonia nitrogen and all kinds of hardly degraded organic substances is significantly degraded, and gathers Phosphorus bacterium can also excessively swallow P, P content is also reduced.Larger molecular organicses when waste water enters HOKTOC biological fluidized beds Small organic molecule is decomposed into previous step, nitrification denitrogenation is further carried out in fluid bed.Both combine energy Ammonia nitrogen, COD, colourity equal size in poisonous and harmful substance in enough coking process waste water of thoroughly effectively degrading, reduction waste water.

Claims (3)

1. a kind of coking chemical waste water total system, including pretreating process section, biochemical processing process section and the depth being linked in sequence Handling process section is spent, the pretreating process section includes grease removal tank and the regulating reservoir being connected with grease removal tank, the depth science and engineering Skill section includes pond after the coagulation reaction tank, coagulative precipitation tank and the processing that are linked in sequence, it is characterised in that the biochemical treatment work Skill section include receiving the anaerobic pond of regulating reservoir water, preaeration tank, anoxic feed well, anoxic pond, Aerobic Pond, precipitation separate tank and Biological fluidized bed, precipitation separate tank is divided into the first heavy pond and second pond；Pending waste water in regulating reservoir connects through anaerobism water pump Anaerobic pond is connect, anaerobic pond water outlet connects preaeration tank through overfall, and preaeration tank bottom sets aeration pump, handled through preaeration tank Waste water afterwards enters the first heavy pond precipitation through overfall, and the first heavy pond bottom is provided with sludge recovery pump, sludge recovery pump point Aeration tank water inlet end and a sludge treater are not connected to, and the overfall that the first heavy pond top is set connects anoxic feed well, Elevator pump is provided with anoxic feed well, the water in anoxic feed well is lifted into anoxic pond, handled through anoxic pond by elevator pump Waste water enters Aerobic Pond afterwards, and Aerobic Pond water inlet end and middle part are provided with medicine dispensing port, and medicine dispensing port and a medicine are delivered Device is connected, Aerobic Pond delivery port connection second pond, and the overfall that the top of second pond is set is divided into first outlet and the Backflow well is connected to anoxic feed well, second outlet by two outlets, the water pump that first outlet is connected in a backflow well, backflow well An intermediate pool is connected, the precipitating sludge of second pond is back in Aerobic Pond and preaeration tank through sludge reflux pump, simultaneously Sludge reflux pump is also connected with sludge treater, and intermediate pool connects biological fluidized bed by water pump, is set in biological fluidized bed water inlet end Nutrient solution addition input pipe is equipped with, the water side of biological fluidized bed and the water inlet end of biological fluidized bed are connected by a check valve Flowed back in being formed, the water side of biological fluidized bed connects the coagulation reaction tank of the advanced treatment process section simultaneously.

2. coking chemical waste water total system according to claim 1, it is characterised in that be provided with the anoxic pond Propeller type mechanical stirring device.

3. coking chemical waste water total system according to claim 1, it is characterised in that the sludge treater is sheet frame Filter press.