CN212451096U - Coking wastewater treatment system capable of achieving lifting aeration - Google Patents
Coking wastewater treatment system capable of achieving lifting aeration Download PDFInfo
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- CN212451096U CN212451096U CN202022093467.9U CN202022093467U CN212451096U CN 212451096 U CN212451096 U CN 212451096U CN 202022093467 U CN202022093467 U CN 202022093467U CN 212451096 U CN212451096 U CN 212451096U
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Abstract
The utility model relates to a coking wastewater can promote processing system of formula aeration belongs to the waste water treatment field. The system comprises a pretreatment system, a biochemical treatment system and an advanced treatment system respectively, wherein the pretreatment system sequentially comprises an accident tank, an oil separation tank and an adjusting tank, wherein the accident tank is only used when an accident occurs, and wastewater directly enters the oil separation tank under normal conditions; the biochemical treatment system comprises a primary anoxic tank, a primary aerobic tank, a primary sedimentation tank, a secondary anoxic tank, a secondary aerobic tank and a secondary sedimentation tank in sequence, wherein the primary aerobic tank and the secondary aerobic tank adopt a liftable aeration system and mainly comprise an air supply main pipe, an air supply branch pipe, an aeration pipe, matched valves and instruments; the advanced treatment system sequentially comprises a flocculation reaction sedimentation tank, a three-sedimentation tank and a clean water tank. The system can improve the utilization rate of oxygen, reduce energy consumption, can be operated under the condition of not cleaning the tank, is convenient to install and maintain, has high removal efficiency of the whole process flow, is compact in arrangement of each treatment unit, and is reasonable and flexible in setting.
Description
Technical Field
The utility model belongs to the waste water treatment field relates to a coking wastewater can promote processing system of formula aeration
Background
The coking wastewater is industrial organic wastewater generated in the processes of high-temperature dry distillation of coal, purification of coal gas, recovery of byproducts and refining, has extremely complex chemical components and contains petroleum, volatile phenol, ammonia nitrogen, sulfide, cyanide, thiocyanide, polycyclic aromatic hydrocarbon, heterocyclic compounds and the like. High-concentration ammonia nitrogen substances contained in the coking wastewater and trace high-toxicity CN-、SCN-Tar, naphthalene and the like, which have the inhibiting effect on microorganisms, belong to typical organic wastewater which is difficult to biodegrade. Therefore, a coking wastewater biochemical treatment system is improved as much as possible, the oxygen utilization rate is increased, the removal efficiency of refractory organics is improved, and the effluent quality is guaranteed.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a coking wastewater can promote formula aeration's processing system for solve coking wastewater organic matter concentration height, biodegradability among the prior art, low, the difficult processing scheduling problem.
In order to achieve the above purpose, the utility model provides a following technical scheme:
a coking wastewater lifting type aeration treatment system comprises the following steps:
the pretreatment system normally allows the coking wastewater to enter an oil separation tank for oil-water separation, removes petroleum and part of suspended matters in the wastewater, and then enters an adjusting tank to play the roles of adjusting water quantity and controlling load.
The biochemical treatment system, the waste water after pretreatment system handles, in proper order through one-level oxygen deficiency pond, one-level good oxygen pond, one sink the pond, the second grade oxygen deficiency pond, the second grade good oxygen pond, two sink the pond, above-mentioned one-level good oxygen pond, second grade good oxygen pond all are provided with nitrify liquid return line, flow back respectively to one-level oxygen deficiency pond and second grade oxygen deficiency pond, nitrify liquid reflux ratio and be 200 ~ 300%, one sinks pond and two and sinks the pond simultaneously and all be provided with the mud return line, flow back respectively to one-level oxygen deficiency pond and second grade oxygen deficiency pond, the mud reflux ratio is 80 ~ 100%. In the process, the first-stage anoxic tank and the first-stage aerobic tank generate nitration and denitrification reactions, ammonia nitrogen in the wastewater can be removed, partial organic matters can be degraded, and total nitrogen and organic matters in the wastewater can be further removed by the second-stage anoxic tank and the second-stage aerobic tank.
The biochemical treatment system is used for efficiently degrading organic matters and reducing energy consumption, and the liftable aeration system can be arranged in the primary aerobic tank and the secondary aerobic tank in a different mode according to different loads. The lifting aeration system mainly comprises an air supply main pipe, an air supply branch pipe, an aeration pipe, a matched valve and an instrument. The air supply main pipe is arranged at the top of the aerobic tank, the air supply branch pipe is vertically inserted into the wastewater, the bottom of the air supply branch pipe is connected with the aeration pipe, the top of the air supply branch pipe is connected with the air supply main pipe, the aeration pipe is provided with an aeration membrane, the opening of the membrane is designed into a self-closing structure, and the air hole is closed when the aeration is stopped, so that the backflow of sewage can be effectively prevented. The air supply main pipe is provided with a flow and temperature detecting instrument which can monitor the operation condition of the aeration system in real time. The service area of the liftable aeration system is 1-5 m2Has a/n oxygen charging capacity of 0.5 to 2kgO2The oxygen utilization rate is 20-40%. The liftable aeration system effectively improves the oxygen utilization rate of the first-stage aerobic tank and the second-stage aerobic tank, and the aerator is maintained, dismantled and installed under the condition that the tanks are not cleaned, so that the operation management is convenient.
In the advanced treatment system, wastewater treated by a biochemical system firstly enters a flocculation reaction sedimentation tank, polymeric ferric sulfate and polyacrylamide are added, the reaction time is 10-15 min, macromolecular refractory organics are mainly removed, then the wastewater flows into a three-sedimentation tank for sedimentation separation, and finally the reaction effluent enters a clean water tank for storage and recycling.
Coking wastewater treatment system includes:
an oil separation tank: the inlet water adopts a mode of bottom inlet and top outlet, and is mainly used for removing petroleum and suspended matters.
A regulating pool: the water quantity is adjusted and the load is controlled.
A first-stage anoxic tank: coking wastewater passing through the pretreatment system firstly enters a primary anoxic tank and respectively receives nitrifying liquid and sludge which flow back from a primary aerobic tank and a primary sedimentation tank, the hydraulic retention time is 30-50 h, the denitrification function is realized under the anoxic condition, and meanwhile, part of organic matters can be degraded. Because the coking wastewater is lack of phosphorus element, KH is added into the tank2PO4The phosphorus element needed by the microorganism is supplemented, and the hyperboloid vertical stirrer is arranged in the tank, so that the wastewater and the sludge can be uniformly distributed in the tank, and the sludge deposition phenomenon is prevented.
A first-stage aerobic tank: the primary aerobic tank adopts a lifting type aeration mode, ammonia nitrogen in the coking wastewater is converted into nitrate nitrogen, the hydraulic retention time is 100-110 h, the ammonia nitrogen flows back to the primary anoxic tank through a nitrifying liquid return pipeline, the reflux ratio is 200-300%, and organic matters in the wastewater are removed simultaneously.
Primary sedimentation tank: and the primary sedimentation tank adopts a radial flow sedimentation tank to separate sludge and water from the effluent of the primary aerobic tank, and part of sludge flows back to the primary anoxic tank through a sludge return pipeline, wherein the reflux ratio is 80-100%.
A secondary anoxic tank: effluent of the primary sedimentation tank flows into the secondary anoxic tank and respectively receives nitrifying liquid and sludge which flow back from the secondary aerobic tank and the secondary sedimentation tank, the hydraulic retention time is 20-25 h, total nitrogen and organic matters are further removed, glucose is added into the tank to supplement the organic matters required by microorganisms, and the hyperboloid vertical stirrer is arranged, so that wastewater and sludge can be uniformly distributed in the tank, and the sludge deposition phenomenon is prevented.
A secondary aerobic tank: the secondary aerobic tank also adopts a lifting type aeration mode to further convert ammonia nitrogen in the coking wastewater into nitrate nitrogen, the hydraulic retention time is 20-25 h, the nitrate nitrogen flows back to the secondary anoxic tank through a nitration liquid return pipeline, the reflux ratio is 200-300%, and organic matters in the wastewater are removed simultaneously. NaHCO is added to maintain alkalinity in the pool3。
A secondary sedimentation tank: and the secondary sedimentation tank adopts a radial flow sedimentation tank to separate sludge and water from the effluent of the secondary aerobic tank, and part of sludge flows back to the secondary anoxic tank through a sludge return pipeline, wherein the reflux ratio is 80-100%.
A flocculation sedimentation tank: flocculating agents such as polyferric sulfate and polyacrylamide are respectively added into the flocculating agents, the reaction time is 10-15 min, the adding amount respectively reaches 100-500 mg/L and 5-50 mg/L, and macromolecular refractory organic matters in the wastewater are mainly removed through flocculation treatment.
A three-sedimentation tank: and (4) allowing the outlet water of the Fenton reaction tank to enter a three-precipitation tank for precipitation separation, and allowing the outlet water to flow into a clean water tank.
A clean water tank: the effluent of the three sedimentation tanks is stored and can be recycled, such as defoaming water and slag flushing water.
The beneficial effects of the utility model reside in that: the utility model discloses biochemical treatment system adopts and to promote formula aeration system, can improve the oxygen utilization ratio, reduces the energy consumption, can operate under the condition of not clearing the pond, and the installation is overhauld conveniently, and whole process flow gets rid of efficiently, and each processing unit arranges compactly, sets up reasonable nimble.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and/or combinations particularly pointed out in the appended claims.
Drawings
For the purposes of promoting a better understanding of the objects, features and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic view of a coking wastewater treatment system according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a liftable aerator system arrangement;
fig. 3 is a detailed view of the liftable aerator system;
fig. 4 is a schematic diagram of a liftable aerator system.
Reference numerals: the system comprises an accident tank 11, an oil separation tank 12, a regulating tank 13, a primary anoxic tank 21, a primary aerobic tank 22, a primary sedimentation tank 23, a secondary anoxic tank 24, a secondary aerobic tank 25, a secondary sedimentation tank 26, a liftable aeration system 27, a gas supply main pipe 271, a gas supply branch pipe 272, an aeration pipe 273 and a flange 3.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in any way limiting the scope of the invention; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc., indicating directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore, the terms describing the positional relationships in the drawings are only used for illustrative purposes and are not to be construed as limiting the present invention, and those skilled in the art can understand the specific meanings of the terms according to specific situations.
As shown in fig. 1 to fig. 3, the coking wastewater lifting type aeration treatment system provided in this embodiment includes a pretreatment system 1, a biochemical treatment system 2, and an advanced treatment system 3, respectively, wherein the pretreatment system includes an accident tank 11, an oil separation tank 12, and an adjusting tank 13, in sequence, the accident tank is used only in case of an accident, and wastewater directly enters the oil separation tank in normal cases; the biochemical treatment system comprises a primary anoxic tank 21, a primary aerobic tank 22, a primary sedimentation tank 23, a secondary anoxic tank 24, a secondary aerobic tank 25 and a secondary sedimentation tank 26 in sequence, wherein the primary aerobic tank and the secondary aerobic tank are respectively provided with a nitration liquid return pipeline which respectively returns to the primary anoxic tank and the secondary anoxic tank, and are provided with a lifting aeration system, so that the oxygen utilization rate is effectively improved, the energy consumption is reduced, and meanwhile, the primary sedimentation tank and the secondary sedimentation tank are respectively provided with a sludge return pipeline which respectively returns to the primary anoxic tank and the secondary anoxic tank; the advanced treatment system sequentially comprises a flocculation reaction sedimentation tank, a three-sedimentation tank and a clean water tank.
A coking wastewater lifting type aeration treatment system comprises the following steps:
the pretreatment system normally allows the coking wastewater to enter an oil separation tank for oil-water separation, removes petroleum and part of suspended matters in the wastewater, and then enters an adjusting tank to play the roles of adjusting water quantity and controlling load.
The biochemical treatment system, the waste water after pretreatment system handles, in proper order through one-level oxygen deficiency pond, one-level good oxygen pond, one sink the pond, the second grade oxygen deficiency pond, the second grade good oxygen pond, two sink the pond, above-mentioned one-level good oxygen pond, second grade good oxygen pond all are provided with nitrify liquid return line, flow back respectively to one-level oxygen deficiency pond and second grade oxygen deficiency pond, nitrify liquid reflux ratio and be 200 ~ 300%, one sinks pond and two and sinks the pond simultaneously and all be provided with the mud return line, flow back respectively to one-level oxygen deficiency pond and second grade oxygen deficiency pond, the mud reflux ratio is 80 ~ 100%. In the process, the first-stage anoxic tank and the first-stage aerobic tank generate nitration and denitrification reactions, ammonia nitrogen in the wastewater can be removed, partial organic matters can be degraded, and total nitrogen and organic matters in the wastewater can be further removed by the second-stage anoxic tank and the second-stage aerobic tank. The biochemical treatment system is used for degrading organic matters efficiently and reducing energy consumption, and the liftable aeration system 27 is arranged in the primary aerobic tank and the secondary aerobic tank in a different mode according to different loads. The lifting aeration system mainly comprisesThe air supply main pipe 271, the air supply branch pipe 272, the aeration pipe 273, the matched valve and the instrument. The air supply main pipe is arranged at the top of the aerobic tank, the air supply branch pipe is vertically inserted into the wastewater, the bottom of the air supply branch pipe is connected with the aeration pipe, the top of the air supply branch pipe is connected with the air supply main pipe, the aeration pipe is provided with an aeration membrane, the opening of the membrane is designed into a self-closing structure, and the air hole is closed when the aeration is stopped, so that the backflow of sewage can be effectively prevented. The air supply main pipe is provided with a flow and temperature detecting instrument which can monitor the operation condition of the aeration system in real time. The air supply branch pipe is provided with a flange 3 and is connected with the air supply main pipe through a flange plate. The service area of the liftable aeration system is 1-5 m2Has a/n oxygen charging capacity of 0.5 to 2kgO2The oxygen utilization rate is 20-40%, the liftable aeration system effectively improves the oxygen utilization rates of the first-stage aerobic tank and the second-stage aerobic tank, and the aerator is convenient to overhaul, dismantle and install under the condition that the tanks are not cleaned.
According to the advanced treatment system, wastewater treated by a biochemical system firstly enters a flocculation reaction sedimentation tank, polymeric ferric sulfate and polyacrylamide are added, the reaction time is 10-15 min, the adding amount respectively reaches 100-500 mg/L and 5-50 mg/L, macromolecular refractory organics are mainly removed, then the wastewater flows into a three-sedimentation tank for sedimentation separation, and finally the reaction effluent enters a clean water tank for storage and recycling.
By adopting the coking wastewater treatment system of the embodiment, the treatment result data of main pollutants at each stage are as follows:
finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the scope of the claims of the present invention.
Claims (4)
1. The utility model provides a coking wastewater can promote processing system of formula aeration which characterized in that: comprises a pretreatment system, a biochemical treatment system and a deep treatment system;
the pretreatment system sequentially comprises an accident pool, an oil separation pool and an adjusting pool; the front end of an oil separation tank in the pretreatment system is connected with an accident tank, the accident tank is used when an accident occurs, and wastewater directly enters the oil separation tank under normal conditions;
the biochemical treatment system sequentially comprises a primary anoxic tank, a primary aerobic tank, a primary sedimentation tank, a secondary anoxic tank, a secondary aerobic tank and a secondary sedimentation tank, wherein the primary aerobic tank and the secondary aerobic tank adopt a liftable aeration system;
the advanced treatment system sequentially comprises a flocculation reaction sedimentation tank, a three-sedimentation tank and a clean water tank.
2. The coking wastewater lift-aerated treatment system of claim 1, wherein: in the biochemical treatment system, a liftable aeration system is arranged in a primary aerobic tank and a secondary aerobic tank in a difference mode according to different loads.
3. The coking wastewater lift-aerated treatment system of claim 1, wherein: the lifting type aeration system comprises an air supply main pipe, an air supply branch pipe, an aeration pipe, a matched valve and an instrument.
4. The coking wastewater lift-aerated treatment system of claim 3, wherein: the aeration device comprises an aeration main pipe, an air supply branch pipe, an aeration membrane, a water tank, a sewage tank; the air supply main pipe is provided with a flow and temperature detecting instrument for monitoring the operation condition of the aeration system in real time.
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| CN111960623A (en) * | 2020-09-22 | 2020-11-20 | 中冶赛迪工程技术股份有限公司 | Coking wastewater treatment system and method capable of achieving lifting aeration |
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