CN204079589U - A kind of chemical wastewater treatment system with anaerobism reflux - Google Patents

A kind of chemical wastewater treatment system with anaerobism reflux Download PDF

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Publication number
CN204079589U
CN204079589U CN201420535081.0U CN201420535081U CN204079589U CN 204079589 U CN204079589 U CN 204079589U CN 201420535081 U CN201420535081 U CN 201420535081U CN 204079589 U CN204079589 U CN 204079589U
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return tank
anaerobic reactor
reflux
tank
water
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戴建军
王文文
史风华
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Nanjing University Yancheng Institute Of Environmental Technology And Engineering
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Nanjing University Yancheng Institute Of Environmental Technology And Engineering
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Abstract

The utility model discloses a kind of chemical wastewater treatment system with anaerobism reflux, belong to chemical wastewater treatment field.The utility model comprises wastewater equalization pond, return tank, anaerobic reactor, effluent trough, water distributor, wastewater equalization pond is connected with return tank top by equalizing tank lift pump, the upper and lower of return tank is connected by reflux pump, and steam Link Port connects external steam pipe and return tank reflux pump water inlet pipe; Water distributor is positioned at the inside of anaerobic reactor, be connected with return tank by return tank lift pump, anaerobic reactor middle and upper part is provided with internal reflux pipe, the internal reflux pipe the other end connects return tank, anaerobic reactor top arranges triphase separator, triphase separator top sets out tank, and effluent trough is connected with outside aftertreatment systems.The utility model can realize stable upflow velocity, ensures muddy water mixed effect stable in anaerobic reactor, improves the capacity of resisting impact load of anaerobic reactor, can Synchronous Heating in reflux.

Description

A kind of chemical wastewater treatment system with anaerobism reflux
Technical field
The utility model relates to chemical wastewater treatment field, more particularly, relates to a kind of chemical wastewater treatment system with anaerobism reflux.
Background technology
The fluctuation of wastewater from chemical industry water quality, the water yield is comparatively large, and has the feature of complicated component, high dense, difficult degradation, and intractability is larger.The high efficiency anaerobic reactors such as UASB (upflow anaerobic sludge blanket reactor)/EGSB (third generation anaerobic reactor) because of less investment, energy consumption is low is widely used in chemical wastewater treatment process.
The anaerobic treatment general residence time of wastewater from chemical industry is longer, and due to the restraining effect of waste water toxic material, in reactor, factor of created gase is lower, and in the dynamic response device of water inlet, stirring intensity is inadequate, so that upflow velocity is less, and treatment effect is not good enough.In order to complete muddy water mixing preferably, large multiple reactor all can strengthen stirring dynamics by the mode increasing backflow.The more reflux type of current engineer applied is inside reactor backflow and effluent recycling two kinds.Internal reflux refers to set up reflux pump, reactor middle and upper part water sets up reflux pump access water inlet pipe, reactor lower part water distributor is jointly entered with water inlet, to realize the effect strengthening stirring intensity, but this kind of reflux type often causes intake pump to conflict mutually with reflux pump, cause can not carrying out into water and backflow simultaneously, thus make that upflow velocity in reactor is less, muddy water mixing is uneven.In addition, because wastewater from chemical industry influent quality, the water yield fluctuate comparatively large, stable upflow velocity can not be ensured in reactor, and impact larger to reactor.Effluent recycling refers to that reactor section divides water outlet to be back to into water equalizing tank, and enter reactor again after mixing with water inlet, this kind of reflux type effectively can reduce influent load, slows down impact dynamics.But this kind of method is not suitable for running under the condition of flooding quantity instability, and the water yield that effluent recycling can result through triphase separator increases, and increases the pressure of triphase separator, can cause out the problem of water-band mud.Therefore, under the condition of influent quality, water yield instability, seek a kind of new reflux type and realize upflow velocity stable in anaerobic reactor, ensure muddy water mixed effect, to having great significance of wastewater from chemical industry anaerobic treatment.
Chinese utility model patent, number of patent application is 201220018318.9, the applying date is on January 16th, 2012, disclose a kind of sewage plant anaerobic reaction system, this utility model includes sewage pond for recovering, equalizing tank, water pump, anaerobic reactor, marsh gas recovery device, the sewage outlet of sewage pond for recovering is connected with the input terminus of equalizing tank, the output terminal of equalizing tank is connected with the input terminus of water pump, water delivery side of pump is communicated with the wastewater inlet of anaerobic reactor, and the wastewater inlet of anaerobic reactor is arranged at the bottom of anaerobic reactor.This utility model employs anaerobic reactor and mainly processes papermaking wastewater, and specific aim is more single, and flow rate of water flow cannot ensure, water feeding of water pump amount is unstable, and install pipeline is complicated, and wastewater treatment efficiency is unstable, insufficient.
Summary of the invention
1. the technical problem that will solve
Large for the water quality and quantity fluctuation existed in prior art, the problem of upflow velocity instability in reactor, the invention provides a kind of chemical wastewater treatment system with anaerobism reflux, it can realize stable water inlet flow velocity, ensure muddy water mixed effect stable in anaerobic reactor, and water outlet can not be caused to run mud, improve the capacity of resisting impact load of anaerobic reactor, can Synchronous Heating, saving heat energy.
2. technical scheme
The purpose of this utility model is achieved through the following technical solutions:
A kind of chemical wastewater treatment system with anaerobism reflux, comprise wastewater equalization pond, effluent trough, also comprise return tank, anaerobic reactor, water distributor, wherein, described wastewater equalization pond is connected with return tank top by equalizing tank lift pump, and return tank reflux pump one end connects return tank top, and the other end is connected with return tank bottom, return tank bottom is provided with steam Link Port, and described steam Link Port connects external steam pipeline;
Described water distributor is arranged in anaerobic reactor, be positioned at the bottom of anaerobic reactor, water distributor is connected with return tank by return tank lift pump, in described anaerobic reactor, top is provided with triphase separator, triphase separator top sets out tank, and effluent trough is connected with outside aftertreatment systems; Described internal reflux pipe one end is arranged at anaerobic reactor middle and upper part, is positioned at the below of triphase separator, and the other end connects outside return tank.
Further, return tank is cylinder-shaped device, and its height is equal with anaerobic reactor height, and the liquid level in return tank is equal with liquid level in anaerobic reactor.
Further, internal reflux pipe is positioned at the distribution in T shape of triphase separator bottom, and the part of the internal reflux pipe horizontal distribution of this end is provided with backflow arm, the distribution of backflow arm horizontal homogeneous, form backflow cross section, backflow arm is provided with eyelet, realizes the even water outlet on backflow cross section.
3. beneficial effect
Compared to prior art, the utility model has the advantage of:
(1), anaerobic reactor outer setting has independently return tank, and the water of anaerobic reactor middle and upper part is back to return tank by internal reflux pipe, and internal reflux pipe is arranged on triphase separator bottom, avoids out the phenomenon of water-band mud;
(2), outside water inlet and the recirculation water mixing in backflow is filled with by internal reflux pipe can reduce the load of water inlet, than only providing separately into the reduction of water toxic substance concentration, improves the capacity of resisting impact load of anaerobic reactor;
(3), reflux adopts internal reflux pipe, and employ internal recycle system, complete the homogeneous effect into water and recirculation water, simple and fast, operability is good;
(4) steam Link Port is set, steam Link Port connects external steam pipeline, can in the winter time time Synchronous Heating is carried out to immediate system, heating completes in return tank, prevent and collecting the heat waster regulating pool heating process to cause, avoid because heat the damage to mud in anaerobic reactor;
(5), the flow maintenance of return tank lift pump is stablized constant, the flow of return tank lift pump equals anaerobic reactor quantity of reflux and aquifer yield sum, the aquifer yield of anaerobic reactor equals the flooding quantity of equalizing tank lift pump, because anaerobic reactor quantity of reflux can change according to the change of flooding quantity, avoid because flooding quantity is not enough and cause muddy water in anaerobic reactor to mix poor phenomenon, avoiding the problem that intake pump conflicts with reflux pump.
Accompanying drawing explanation
Fig. 1 is one-piece construction schematic diagram of the present utility model.
Number in the figure illustrates:
1, wastewater equalization pond; 2, equalizing tank lift pump; 3, return tank reflux pump; 4, steam Link Port; 5, return tank; 6, return tank lift pump; 7, anaerobic reactor; 8, effluent trough; 9, triphase separator; 10, internal reflux pipe; 11, water distributor.
Embodiment
Below in conjunction with Figure of description and specific embodiment, the utility model is described in detail.
Embodiment 1
As shown in Figure 1, the present embodiment is the enforcement for certain waste water in pharmaceutical plants.Construction scale of projects 500t/d, actual waste water amount fluctuates at 200t/d-500t/d.Main technique is up-flow anaerobic sludge blanket UASB+A/O, and the anaerobic waste water water outlet chemical oxygen demand COD entering UASB fluctuates between 3000mg/L-5000mg/L.
A kind of chemical wastewater treatment system with anaerobism reflux, comprise wastewater equalization pond 1, effluent trough 8, return tank 5, anaerobic reactor 7, water distributor 11, wherein, described wastewater equalization pond 1 is connected with return tank 5 top by equalizing tank lift pump 2, waste water in wastewater equalization pond 1 is promoted to return tank 5 by equalizing tank lift pump 2, and flow is 25m 3/ h, return tank reflux pump 3 one end connects return tank 5 top, and the other end is connected with return tank 5 bottom, and return tank 5 is cylinder-shaped device, and height is highly equal with anaerobic reactor 7, and reflux pump flow velocity is 10m 3/ h, return tank 5 bottom is provided with steam Link Port 4.Described steam Link Port 4 connects external steam pipeline, can heat total system, in maintenance anaerobic reactor 7, temperature is at 15 DEG C, ensure anaerobic treatment effect, heating completes in return tank, prevent and collecting the heat waster regulating pool heating process to cause, avoid because heat the damage to mud in anaerobic reactor.
At same plane bottom wastewater equalization pond 1 bottom position and anaerobic reactor 7, this plane is lower than Earth surface plane, because anaerobic reactor 7 outer setting has independently return tank 5, the water of anaerobic reactor 7 middle and upper part is back to return tank 5 by internal reflux pipe 10, and the liquid level in return tank is equal with liquid level in anaerobic reactor.Internal reflux pipe 10 is arranged on triphase separator 9 bottom, avoid out the phenomenon of water-band mud, outside water inlet and the recirculation water mixing in backflow filling 5 by internal reflux pipe 10, reduce the load of water inlet, than only provide low into water toxic substance concentration separately, improve the capacity of resisting impact load of anaerobic reactor 7; Use internal reflux pipe 10 internal recycle system, complete the homogeneous effect into water and recirculation water, operability is good.
Described water distributor 11 is arranged in anaerobic reactor 7, is positioned at the bottom of anaerobic reactor 7, and water distribution such as drag uniform such as water distributor 11 grade, water distributor 11 is connected with return tank 5 by return tank lift pump 6, and return tank lift pump 6 flow velocity is 60m 3/ h, in anaerobic reactor 7, top is provided with triphase separator 9, and triphase separator 9 top sets out tank 8, and effluent trough 8 is connected with outside aftertreatment systems.
Described internal reflux pipe 10 one end is arranged at anaerobic reactor 7 middle and upper part, be positioned at the below of triphase separator 9, the other end connects outside return tank 5, internal reflux pipe 10 is positioned at one end distribution in T shape of anaerobic reactor 7, the part of this end internal reflux pipe 10 horizontal distribution is provided with backflow arm, and the distribution of backflow arm horizontal homogeneous, forms backflow cross section, backflow arm is provided with eyelet, realizes the even water outlet on backflow cross section.One end that internal reflux pipe 10 is positioned at anaerobic reactor 7 is at anaerobic reactor 7 to downward-extension, and draw backward upper extension by sidewall bottom anaerobic reactor 7, be connected with external reflux tank 5, anaerobic reactor return velocity is 35m 3/ h.
The flow maintenance of return tank lift pump 6 is stablized constant, the flow of return tank lift pump 6 equals anaerobic reactor 7 quantity of reflux and aquifer yield sum, the aquifer yield of anaerobic reactor 7 equals the flooding quantity of equalizing tank lift pump 2, because anaerobic reactor 7 quantity of reflux can change according to the change of flooding quantity, avoid because flooding quantity is not enough and cause muddy water in anaerobic reactor 7 to mix poor phenomenon, avoiding the problem of conflicting with recirculation water into water.In anaerobic reactor, upflow velocity maintains 0.7m/h, and muddy water completes mixing preferably, and triphase separator 9 separating effect is better, and anaerobic effluent ss suspended solid is few.After effluent trough 8 is discharged, enter aftertreatment systems, final anaerobic effluent chemical oxygen demand COD is at 1000mg/L.
Below be schematically described the invention and embodiment thereof, this description does not have restricted, and one of embodiment of the also just the invention shown in accompanying drawing, actual structure is not limited thereto.So, if those of ordinary skill in the art enlightens by it, when not departing from this creation aim, designing the frame mode similar to this technical scheme and embodiment without creationary, the protection domain of this patent all should be belonged to.

Claims (3)

1. one kind has the chemical wastewater treatment system of anaerobism reflux, comprise wastewater equalization pond (1), effluent trough (8), it is characterized in that: also comprise return tank (5), anaerobic reactor (7), water distributor (11), wherein, described wastewater equalization pond (1) is connected with return tank (5) top by equalizing tank lift pump (2), return tank reflux pump (3) one end connects return tank (5) top, the other end is connected with return tank (5) bottom, return tank (5) bottom is provided with steam Link Port (4), described steam Link Port (4) connects external steam pipeline,
Described water distributor (11) is arranged in anaerobic reactor (7), be positioned at the bottom of anaerobic reactor (7), water distributor (11) is connected with return tank (5) by return tank lift pump (6), in described anaerobic reactor (7), top is provided with triphase separator (9), triphase separator (9) top sets out tank (8), and effluent trough (8) is connected with outside aftertreatment systems; Internal reflux pipe (10) one end is arranged at anaerobic reactor (7) middle and upper part, is positioned at the below of triphase separator (9), and the other end connects outside return tank (5).
2. a kind of chemical wastewater treatment system with anaerobism reflux according to claim 1, is characterized in that: described return tank (5) is cylinder-shaped device, and its height is highly equal with anaerobic reactor (7).
3. a kind of chemical wastewater treatment system with anaerobism reflux according to claim 1 and 2, it is characterized in that: described internal reflux pipe (10) is positioned at the distribution in T shape of triphase separator (10) lower end, the part of internal reflux pipe (10) horizontal distribution of this end is provided with backflow arm, the distribution of backflow arm horizontal homogeneous, form backflow cross section, backflow arm is provided with eyelet.
CN201420535081.0U 2014-09-17 2014-09-17 A kind of chemical wastewater treatment system with anaerobism reflux Active CN204079589U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105936545A (en) * 2016-06-06 2016-09-14 中国石油集团东北炼化工程有限公司吉林设计院 Wastewater anaerobic treatment system
CN107487843A (en) * 2017-10-10 2017-12-19 重庆大学 A kind of vacuous solar energy heat collecting type open air upflow anaerobic sludge blanket reactor
CN110482694A (en) * 2019-07-22 2019-11-22 四川工商职业技术学院 A kind of high-rate anaerobic reactor external circulating system and external circulation process

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105936545A (en) * 2016-06-06 2016-09-14 中国石油集团东北炼化工程有限公司吉林设计院 Wastewater anaerobic treatment system
CN107487843A (en) * 2017-10-10 2017-12-19 重庆大学 A kind of vacuous solar energy heat collecting type open air upflow anaerobic sludge blanket reactor
CN110482694A (en) * 2019-07-22 2019-11-22 四川工商职业技术学院 A kind of high-rate anaerobic reactor external circulating system and external circulation process

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