CN205590517U - Ozone - membrane bioreactor coking wastewater advanced treatment unit that pH control was adjusted - Google Patents
Ozone - membrane bioreactor coking wastewater advanced treatment unit that pH control was adjusted Download PDFInfo
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- CN205590517U CN205590517U CN201620362837.5U CN201620362837U CN205590517U CN 205590517 U CN205590517 U CN 205590517U CN 201620362837 U CN201620362837 U CN 201620362837U CN 205590517 U CN205590517 U CN 205590517U
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Abstract
The utility model discloses an ozone that pH control was adjusted membrane bioreactor coking wastewater advanced treatment unit, include: sand filtration tank is equipped with coking wastewater entry and delivery port, and the delivery port is connected with the ozone oxidation tower through buffer pool and the pipeline that is equipped with the centrifugal pump, be equipped with gas distribution device and the ultraviolet fluorescent tube above the gas distribution device bottom in the ozone oxidation tower, the gas distribution device is connected with the outside ozone generator who sets up of ozone oxidation tower, and the outlet pipe and the acid -base regulation jar of ozone oxidation tower are connected, the acid -base is adjusted the jar and is connected with the peristaltic pump, and the outlet pipe that the jar was adjusted to the acid -base is connected to integrated MBR pond through the water pump, the outlet pipe in integration MBR pond is connected with the product water tank through being equipped with the pipeline of producing the water pump, wash the play water piping connection of water tank through the pipeline that is equipped with anti - scavenging pump and the MBR pond that unifies. Is the device because with ozone membrane bioreactor combines, has improved the utilization efficiency of ozone, saves the ozone cost, improves coking wastewater's advanced treatment effect.
Description
Technical Field
The utility model relates to the field of wastewater treatment, in particular to an ozone-membrane bioreactor coking wastewater advanced treatment device with pH control adjustment.
Background
The coking wastewater is industrial wastewater generated in the coking industry in the processes of high-temperature dry distillation of coal, purification of coal gas and recovery of byproducts. The wastewater not only contains high-concentration inorganic pollutants such as ammonia nitrogen, cyanide, thiocyanide and the like, but also contains organic pollutants such as phenols, pyridine, quinoline, polycyclic aromatic hydrocarbon and the like, and is typical toxic, harmful and non-biodegradable industrial wastewater. The common treatment process of the coking wastewater at present is a dephenolization and ammonia distillation pretreatment, a biochemical secondary treatment and a coagulating sedimentation process. Although partial organic matters can be removed by adopting the process, the waste water has poor biochemistry and high content of organic matters which are difficult to biodegrade, the COD and ammonia nitrogen concentration of the effluent are still high, and the quality of the effluent is unstable and is difficult to reach the national discharge standard.
In order to improve the treatment effect of the coking wastewater and reduce the harm of the coking wastewater to the environment, the advanced treatment of the coking wastewater needs to be solved urgently. The double-membrane method is a common coking wastewater advanced treatment process, the effluent quality is good, but the problems of high treatment cost and difficult treatment of residual concentrated water exist.
The oxidation-reduction potential of the ozone is 2.07V, the ozone can oxidize various organic pollutants which are difficult to degrade in water, the reaction speed with organic matters is high, secondary pollution is not generated, and the effects of decoloring and deodorizing can be achieved. The oxidation of organic matter by ozone involves two aspects: on one hand, ozone directly oxidizes organic matters, and on the other hand, ozone is decomposed by itself and generates hydroxyl radicals (. OH) with stronger oxidizing capability through a chain reaction. The hydroxyl radicals further oxidize refractory organics. Researches show that after oxidation, the concentration of organic matters in the sewage is reduced, and the biodegradability of the organic matters in the effluent is improved to a certain extent, so that a feasible guarantee is provided for subsequent secondary biochemical treatment.
In the water treatment process, the cost for treating sewage by independently adopting ozone oxidation is high, a large amount of ozone needs to be consumed to completely mineralize organic matters, and the ozone oxidation is combined with a biological treatment process for use. The Membrane Bioreactor (MBR) is a novel sewage treatment process combining biological treatment and membrane separation technology, and has the advantages of small occupied area, good effluent quality, convenience for automatic control and the like. Currently, MBR processes have been widely used in sewage treatment. Along with the improvement of the water quality standard of coking wastewater effluent in China, ozone and MBR technology is more and more applied to the advanced treatment of sewage. The ozone oxidation and MBR are combined to form an ozone-MBR combined process, which is favorable for complementary advantages, reduces ozone consumption, saves treatment cost and can improve the treatment effect of the system. At present, no ozone-MBR combined process is used for carrying out advanced treatment on coking wastewater.
SUMMERY OF THE UTILITY MODEL
Based on the problem that above-mentioned prior art exists, the utility model provides an ozone-membrane bioreactor coking wastewater advanced treatment unit that pH control was adjusted can realize combining ozone and MBR and carry out advanced treatment to coking wastewater, promotes coking wastewater's advanced treatment effect.
In order to solve the technical problem, the utility model provides a pH control adjusts ozone-membrane bioreactor coking wastewater advanced treatment unit, and the processing object is muddy heavy pond play water after the conventional biochemical treatment of coking wastewater, include: the device comprises a sand filtration tank, a buffer tank, a centrifugal pump, an ozone oxidation tower, an ozone generator, an acid-base adjusting tank, a peristaltic pump, an integrated MBR tank, a water production tank and a cleaning water tank; wherein,
the sand filtration tank is provided with a water inlet and a water outlet, and the water outlet is connected with the ozone oxidation tower through the buffer tank and a pipeline provided with a centrifugal pump;
the bottom in the ozone oxidation tower is provided with a gas distribution device and an ultraviolet lamp tube positioned above the gas distribution device, the gas distribution device is connected with an ozone generator arranged outside the ozone oxidation tower, and a water outlet pipe of the ozone oxidation tower is connected with the acid-base adjusting tank;
the acid-base adjusting tank is connected with the peristaltic pump, and a water outlet pipe of the adjusting tank is connected to the integrated MBR tank through a centrifugal pump;
a water outlet pipe of the integrated MBR tank is connected with the water production tank through a pipeline provided with a water production pump;
the cleaning water tank is connected with a water outlet pipe of the integrated MBR tank through a pipeline provided with a reverse cleaning pump.
The utility model has the advantages that: the advanced treatment device organically combines a sand filter tank, a buffer tank, a centrifugal pump, an ozone oxidation tower, an ozone generator, an acid-base adjusting tank, a peristaltic pump, an integrated MBR tank, a water production tank and a cleaning water tank into the advanced treatment device of coking wastewater, fully utilizes the strong oxidation capacity of ozone of the ozone oxidation tower to remove organic matters in the coking wastewater, not only utilizes the direct oxidation action of ozone on the organic matters to remove the organic matters, but also changes the biodegradability of part of refractory organic matters in the wastewater through ozone oxidation, and the part of organic matters are further removed through a subsequent membrane bioreactor of the integrated MBR tank, thereby improving the utilization efficiency of ozone, saving the ozone cost and improving the treatment effect of a system; the treatment device considers the influence of the pH value of inlet water, and improves the metabolism environment of microorganisms in the integrated MBR tank and enhances the application range of the treatment device in practical engineering by arranging the pH adjusting tank in front of the integrated MBR tank; the integrated MBR tank has small occupied area, can realize automation of operation, and is particularly suitable for upgrading and reconstructing processes of sewage treatment plants with short or limited land.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of an advanced treatment apparatus according to an embodiment of the present invention;
in fig. 1: 1-a sand filter tank; 2-a buffer pool; 3-a centrifugal pump; 4-an ozone oxidation tower; 5-an ozone generator; 6-acid-base adjusting tank; 7-a peristaltic pump; 8-an integrated MBR tank; 9-producing a water tank; 10-cleaning the water tank;
FIG. 2 is a diagram illustrating the removal effect of COD in the advanced wastewater treatment by the advanced treatment device according to the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention are described below clearly and completely, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiment of the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The present invention will be further explained with reference to the drawings and the embodiments.
As shown in figure 1, the embodiment of the utility model provides a pH control regulation's ozone-membrane bioreactor coking wastewater advanced treatment unit for muddy heavy pond of coking wastewater after conventional biochemical treatment goes out water, include: the device comprises a sand filtration tank, a buffer tank, a centrifugal pump, an ozone oxidation tower, an ozone generator, an acid-base adjusting tank, a peristaltic pump, an integrated MBR tank, a water production tank and a cleaning water tank; wherein the sand filter tank adopts a glass fiber reinforced plastic sand filter tank;
the sand filter tank is provided with a coking wastewater inlet and a water outlet, and the water outlet is connected with the ozone oxidation tower through the buffer tank and a pipeline provided with a centrifugal pump;
the bottom in the ozone oxidation tower is provided with a gas distribution device and an ultraviolet lamp tube positioned above the gas distribution device, the gas distribution device is connected with an ozone generator arranged outside the ozone oxidation tower, and a water outlet pipe of the ozone oxidation tower is connected with the acid-base adjusting tank;
the acid-base adjusting tank is connected with the peristaltic pump, and a water outlet pipe of the acid-base adjusting tank is connected to the integrated MBR tank through a centrifugal pump;
a water outlet pipe of the integrated MBR tank is connected with the water production tank through a pipeline provided with a water production pump;
the cleaning water tank is connected with a water outlet pipe of the integrated MBR tank through a pipeline provided with a reverse cleaning pump.
Among the above-mentioned advanced treatment unit, integration MBR pond is by separating the oxygen deficiency pond and the membrane cisterna that communicate in proper order in the cell body, be equipped with agitating unit in the oxygen deficiency pond, be equipped with submergence formula hollow fiber milipore filter subassembly in the membrane cisterna, the membrane cisterna is equipped with the backward flow extremely the return line in oxygen deficiency pond.
In the advanced treatment device, the acid-base adjusting tank adopts an adjusting tank provided with an acid-base adding device.
In the above advanced treatment device, the water production pump is a vacuum water production centrifugal pump with a vacuum tank at the upper part and a centrifugal pump at the lower part.
In the advanced treatment device, the ultraviolet lamp tube is arranged in the ozone oxidation tower, and the ultraviolet lamp is adopted for photocatalytic oxidation, so that the oxidation effect and the ozone utilization rate of ozone are improved. Set up acid-base adjusting tank between ozone oxidation tower and MBR pond, make ozone oxidation tower go out remaining ozonolysis in the water, prevent that ozone from getting into in subsequent integration MBR pond, cause the influence to the microorganism. An acid-base adding device is arranged on the acid-base adjusting tank, so that the pH value of water entering the integrated MBR tank is ensured to be within the range of 6-9. The vacuum tank is arranged between the water outlet pipe of the MBR membrane assembly of the integrated MBR tank and the centrifugal pump, the vacuum tank is kept at a stable negative pressure through the suction of the water-producing centrifugal pump, and stable water production is realized through the siphon action.
In the advanced treatment device, the sand filter tank preferably adopts a glass fiber reinforced plastic sand filter tank, and is used for removing part of suspended matters in the effluent of the coking wastewater mixing and settling tank, so that the water is free from the interference of particles during ozone oxidation; the ozone generator takes pure oxygen as a raw material to prepare ozone; the high-efficiency ozone oxidation tower is a place for oxidizing refractory organic matters by ozone, in order to improve the effect of ozone oxidation, an ultraviolet lamp tube is arranged in the oxidation tower, the oxidation capacity and efficiency of ozone are improved by adopting a photocatalytic oxidation method, and the effluent of the ozone oxidation tower enters an acid-base adjusting tank; the acid-base adjusting tank is arranged between the ozone oxidation tower and the integrated MBR tank, the acid-base adjusting tank has two functions, firstly, the pH value of inlet water of the integrated MBR tank is adjusted, the pH value of outlet water of the coking wastewater mixing and settling tank is sometimes low in the production and operation process, the acidity is high, the subsequent microbial activity of the integrated MBR tank can be inhibited, the MBR treatment effect is influenced, the acid-base adjusting tank can adopt an adjusting tank provided with an acid-base adding device, the pH value of inlet water can be adjusted in time according to the water quality characteristics of the inlet water, and the microbial activity of the subsequent integrated MBR tank is guaranteed; secondly, the influence of ozone on microorganisms is reduced, the water treated by the ozone contains ozone with certain concentration, although the concentration is not high, the oxidation potential of the ozone is high, the oxidation capacity is strong, and the ozone also has certain influence on the microorganisms in the subsequent integrated MBR tank; the acid-base regulation tank is arranged, so that the influence of ozone remained in ozone oxidation on microorganisms is reduced, unstable ozone can be automatically decomposed into oxygen in the retention process of the acid-base regulation tank, and water in the acid-base regulation tank is pumped to the integrated MBR tank; the integration MBR pond includes: the anaerobic reactor comprises an anaerobic tank and a membrane tank, wherein a stirring device is arranged in the anaerobic tank, and an immersed hollow fiber ultrafiltration membrane component is arranged in the membrane tank. The lower part of the membrane component is provided with an aeration perforated pipe for blast aeration and controlling membrane pollution, the upper part of the membrane component is connected with a vacuum tank, and the bottom of the vacuum tank is connected with a centrifugal pump; before water is produced in the integrated MBR tank, 2/3 clean water is injected into the vacuum tank in advance, the vacuum tank is sealed and is communicated with a water production centrifugal pump, and then water in the vacuum tank is pumped by the centrifugal pump, so that negative pressure is generated in the vacuum tank. Under the action of atmospheric pressure, water in the mixed solution in the membrane pool enters a pipeline through an ultrafiltration membrane and is collected in a vacuum tank, continuous water production is realized under the action of a centrifugal pump, and the water enters a water production tank; a cleaning water tank is arranged on one side of the integrated MBR tank, sodium hypochlorite cleaning liquid with certain concentration is placed in the cleaning water tank, and the hollow fiber ultrafiltration membrane is subjected to medicament cleaning through a backwashing pump; the water production, aeration and membrane module cleaning of the integrated MBR tank can be controlled by an automatic control system, and the water production period and the water production flow can be adjusted according to the needs of actual conditions.
With reference to fig. 1, the process flow of the advanced treatment device for treating coking wastewater of the utility model is specifically as follows: the effluent of the coking wastewater mixing and settling tank is pumped to a sand filter tank by a submersible sewage pump for filtering, so that a small amount of suspended matters in the water are mainly removed, the influence of suspended particles on the subsequent ozone oxidation is avoided, and the ozone oxidation efficiency is ensured; the water from the sand filtering tank enters a buffer pool and then is conveyed to an ozone oxidation tower through a pump to be fully contacted with the ozone generated by an ozone generator. The water power retention time of the ozone oxidation is 0.9-1.8 hours. And (3) allowing effluent of the ozone oxidation tower to enter an adjusting tank, wherein the hydraulic retention time of the adjusting tank is 1-1.5 hours. And a pH meter is arranged in the adjusting tank, and the pH value of the inlet water is monitored. When the pH value is less than or equal to 5.5, adding a sodium hydroxide solution into the adjusting tank through a peristaltic pump. When the pH value is more than or equal to 8.5, stopping adding (the effluent of the common coking wastewater mixing and settling tank is acidic). Pumping the effluent of the adjusting tank to an MBR anoxic tank by a pump; denitrifying bacteria in the MBR anoxic tank reduce nitrate in the membrane tank reflux mixed liquor into nitrogen and consume part of organic matters. The rest biochemical organic matters which are not utilized by the denitrifying bacteria are further degraded by the aerobic bacteria in the membrane tank; finally, the activated sludge mixed liquor is subjected to membrane separation to form produced water, and the produced water is discharged into a water production tank, wherein the pumping stop ratio of the produced water pump is 8 min: 2 min; after the operation is carried out for a period of time, when the membrane flux is reduced and the transmembrane pressure difference is increased to 20kPa, the cleaning water pump is started, and the sodium hypochlorite cleaning solution for cleaning the water tank is reversely injected into the membrane module.
Examples
Adopt the utility model discloses a degree of depth processing apparatus handles the muddy heavy pond of a certain coal chemical industry enterprise in Tangshan and goes out water, and the device is handled the scale and is 1 ~ 2m3The average inlet water COD of the device is 149mg/L, the ammonia nitrogen is 2.49mg/L, the pH value is 5.2, and the chroma is 50 times. The effluent COD was removed as shown in FIG. 2, and the chromaticity was removed with good effect. The result shows that the average effluent COD is 78mg/L, the ammonia nitrogen is 0.81mg/L, the pH value is 7.2, the chroma is 10 times, and the effluent reaches the national emission standard of the discharge Standard of pollutants for coking chemical industry (GB 16171-2012). Through accounting, the cost of ozone oxidation treatment is 0.96 yuan/m3MBR unit processing cost of 0.8 yuan/m3The total treatment cost of the ozone MBR is 1.76 yuan/m3. Compared with a double-membrane process (ultrafiltration and nanofiltration), the method has the advantages of low treatment cost and no generation of concentrated water.
The above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are all covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (4)
1. The utility model provides a pH control regulation's ozone-membrane bioreactor coking wastewater advanced treatment unit which characterized in that includes: the device comprises a sand filtration tank, a buffer tank, a centrifugal pump, an ozone oxidation tower, an ozone generator, an acid-base adjusting tank, a peristaltic pump, an integrated MBR tank, a water production tank and a cleaning water tank; wherein,
the sand filter tank is provided with a coking wastewater inlet and a water outlet, and the water outlet is connected with the ozone oxidation tower through the buffer tank and a pipeline provided with a centrifugal pump;
the bottom in the ozone oxidation tower is provided with a gas distribution device and an ultraviolet lamp tube positioned above the gas distribution device, the gas distribution device is connected with an ozone generator arranged outside the ozone oxidation tower, and a water outlet pipe of the ozone oxidation tower is connected with the acid-base adjusting tank;
the acid-base adjusting tank is connected with the peristaltic pump, and a water outlet pipe of the acid-base adjusting tank is connected to the integrated MBR tank through a centrifugal pump;
a water outlet pipe of the integrated MBR tank is connected with the water production tank through a pipeline provided with a water production pump;
the cleaning water tank is connected with a water outlet pipe of the integrated MBR tank through a pipeline provided with a reverse cleaning pump.
2. The advanced coking wastewater treatment device with pH control and regulation for the ozone-membrane bioreactor according to claim 1, wherein the integrated MBR tank is a tank body which is internally divided into an anoxic tank and a membrane tank which are sequentially communicated, a stirring device is arranged in the anoxic tank, an immersed hollow fiber ultrafiltration membrane component is arranged in the membrane tank, an aeration perforated pipe is arranged at the lower part of the immersed hollow fiber ultrafiltration membrane component and is connected with an externally arranged air blower, and the membrane tank is provided with a return pipeline which returns to the anoxic tank.
3. The advanced treatment device for coking wastewater of an ozone-membrane bioreactor with pH control adjustment according to claim 1 or 2, characterized in that the adjusting tank is an adjusting tank provided with an acid and alkali adding device.
4. The advanced coking wastewater treatment device with pH control and regulation for the ozone-membrane bioreactor according to claim 1 or 2, characterized in that the water production pump adopts a vacuum water production centrifugal pump with a vacuum tank at the upper part and a centrifugal pump at the lower part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620362837.5U CN205590517U (en) | 2016-04-26 | 2016-04-26 | Ozone - membrane bioreactor coking wastewater advanced treatment unit that pH control was adjusted |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620362837.5U CN205590517U (en) | 2016-04-26 | 2016-04-26 | Ozone - membrane bioreactor coking wastewater advanced treatment unit that pH control was adjusted |
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| CN205590517U true CN205590517U (en) | 2016-09-21 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109422430A (en) * | 2017-09-04 | 2019-03-05 | 中国石油化工股份有限公司 | A kind of processing method of high organic nitrogen waste water |
| CN110723862A (en) * | 2018-07-16 | 2020-01-24 | 中国石油化工股份有限公司 | Method for improving removal effect of ammonia nitrogen and total nitrogen in acrylonitrile sewage |
| CN117142705A (en) * | 2023-09-18 | 2023-12-01 | 河北张宣高科科技有限公司 | Coking wastewater advanced treatment process and device |
-
2016
- 2016-04-26 CN CN201620362837.5U patent/CN205590517U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109422430A (en) * | 2017-09-04 | 2019-03-05 | 中国石油化工股份有限公司 | A kind of processing method of high organic nitrogen waste water |
| CN110723862A (en) * | 2018-07-16 | 2020-01-24 | 中国石油化工股份有限公司 | Method for improving removal effect of ammonia nitrogen and total nitrogen in acrylonitrile sewage |
| CN117142705A (en) * | 2023-09-18 | 2023-12-01 | 河北张宣高科科技有限公司 | Coking wastewater advanced treatment process and device |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160921 Termination date: 20190426 |
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| CF01 | Termination of patent right due to non-payment of annual fee |