CN217103495U - Waste acid liquid treatment system - Google Patents
Waste acid liquid treatment system Download PDFInfo
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- CN217103495U CN217103495U CN202220864647.9U CN202220864647U CN217103495U CN 217103495 U CN217103495 U CN 217103495U CN 202220864647 U CN202220864647 U CN 202220864647U CN 217103495 U CN217103495 U CN 217103495U
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Abstract
The utility model discloses a waste acid liquid processing system, including equalizing basin, coagulating sedimentation air supporting pond, one section ABR anaerobism pond, two-stage process anaerobism pond, contact oxidation pond, senior oxidation pond, active carbon filter, precision filter and the system of receiving strain that connects gradually the setting, install the MBR system in the contact oxidation pond, the MBR system is connected with senior oxidation pond, is provided with the internal reflux pipeline in the two-stage process anaerobism pond, is connected between MBR system and the two-stage process anaerobism pond and is provided with outer backflow pipeline. The waste acid liquid treatment system can be used for mixing and purifying waste acid liquid and production wastewater, can remove sulfate, refractory substances, colloid, polyphenol complex, dispersed oil, emulsified oil, suspended matters, COD (chemical oxygen demand) and BOD (biochemical oxygen demand) in the wastewater, and can discharge the treated effluent water to the standard.
Description
Technical Field
The utility model relates to a mill spent acid treatment technical field especially relates to a waste acid liquid processing system.
Background
The waste liquid in the factory comprises waste acid liquid and production wastewater generated in the production process, wherein the waste acid liquid contains a large amount of acid solutions such as sulfuric acid and the like, and can be discharged after being purified, and because the production wastewater and the waste acid liquid have different components, two sets of purifying equipment are often required to be arranged for respectively purifying and discharging, so that the purification cost is increased.
The existing method for treating the waste acid liquid comprises the following steps: adding calcium hydroxide into the waste acid liquor to change the acid liquor into paste, then carrying out centrifugal dehydration treatment on the paste, removing precipitates, adding supernatant into an adjusting tank, adjusting and then discharging. Although the treatment process is simple, with the higher and higher national requirements on environmental protection, the sewage discharged after the regulation of the regulating tank is impure in filtration and low in purification degree, and cannot reach the national discharge standard.
In view of the foregoing, it is desirable to provide a spent acid treatment system to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that, to current acid pickle processing system handle behind the sewage filter impure, the purification degree is not high, can not reach national emission standard, and can't handle the problem of acid pickle and waste water, provide an acid pickle processing system simultaneously.
In order to solve the technical problem, the embodiment of the utility model provides a spent acid processing system, this spent acid processing system includes: the equalizing basin, be connected with the coagulating sedimentation air supporting pond, the coagulating sedimentation air supporting pond is connected with one section ABR anaerobism pond, one section ABR anaerobism pond is connected with two sections anaerobism ponds, two sections anaerobism ponds are connected with the contact oxidation pond, the contact oxidation pond is connected with senior oxidation pond, senior oxidation pond is connected with active carbon filter, active carbon filter is connected with precision filter, precision filter and nanofiltration headtotail, install the MBR system in the contact oxidation pond, the MBR system is connected with senior oxidation pond, be provided with interior backflow pipeline in the two sections anaerobism ponds, it is provided with outer backflow pipeline to connect between MBR system and the two sections anaerobism ponds.
The waste acid liquid treatment system further comprises a reaction tank and a centrifugal dehydrator, the reaction tank is connected with the waste acid liquid pipe, the centrifugal dehydrator is connected with the reaction tank, and the regulating tank is connected with the centrifugal dehydrator and the production wastewater pipe.
Wherein, a doser is arranged on one side of the reaction tank and one side of the coagulating sedimentation air-floating tank.
Wherein, coagulating sedimentation air supporting pond, one section ABR anaerobism pond, two-stage process anaerobism pond and MBR system all are connected with the sludge impoundment, and the sludge impoundment is connected with the filter press of frame.
Wherein, the contact oxidation pond and the MBR system are both provided with air blowers.
Wherein, the nanofiltration system is connected with the advanced oxidation tank through a concentrated water return pipe.
Implement the embodiment of the utility model provides a, following beneficial effect has:
the waste acid liquid treatment system can be used for mixing and purifying waste acid liquid and industrial wastewater, and the waste acid liquid is subjected to alkali ash neutralization and precipitation treatment through the reaction tank, so that sulfate and refractory substances in the wastewater are removed; removing colloid and polyphenol complex in the wastewater through treatment of a coagulating sedimentation air flotation tank, reducing the content of inhibiting substances in the wastewater, and removing dispersed oil, emulsified oil and suspended matters in the wastewater through air flotation; after the anaerobic ABR process treatment, a large amount of COD in the wastewater is removed; after the wastewater is treated by a contact oxidation pond with an MBR system arranged inside, BOD and COD in the wastewater are removed; finally, after the advanced treatment of the nanofiltration system, the effluent can reach the standard and be discharged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a block diagram of the waste acid liquid treatment system provided by the present invention.
In the figure: the device comprises a reaction tank 1, a centrifugal dehydrator 2, an adjusting tank 3, a coagulating sedimentation air flotation tank 4, a first-section ABR anaerobic tank 5, a second-section anaerobic tank 6, a contact oxidation tank 7, an MBR system 8, an advanced oxidation tank 9, an activated carbon filter 10, a precision filter 11, a nanofiltration system 12, a sludge tank 13 and a plate-and-frame filter press 14.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in 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.
Referring to fig. 1, fig. 1 is a block diagram of a waste acid solution treatment system provided by the present invention.
The reaction tank 1 is connected with a waste acid liquid pipe, and the centrifugal dehydrator 2 is connected with the reaction tank 1. One side of the reaction tank 1 is provided with a medicine feeder for feeding Ca (OH) 2 。
The adjusting tank 3 is connected with the centrifugal dehydrator 2, the wastewater production pipe and the coagulating sedimentation air-floating tank 4, and a lifting pump is arranged on a connecting pipeline between the adjusting tank 3 and the coagulating sedimentation air-floating tank 4.
The coagulating sedimentation air flotation tank 4 is connected with a first-section ABR anaerobic tank 5, and the first-section ABR anaerobic tank 5 is connected with a second-section anaerobic tank 6. A chemical adding device is arranged on one side of the coagulating sedimentation air-floating tank 4 and is used for adding Na 2 CO 3 PAC, PAM, and a lifting pump is arranged on a connecting pipeline between the coagulating sedimentation air flotation tank 4 and the section of ABR anaerobic tank.
The second-stage anaerobic tank 6 is connected with the contact oxidation tank 7, and an internal reflux pipeline is arranged between the inner outlet end and the inner inlet end of the second-stage anaerobic tank 6.
An MBR system 8 is arranged in the contact oxidation pond 7, and blowers are arranged on the contact oxidation pond 7 and the MBR system 8. The MBR system 8 is connected with the advanced oxidation pond 9, and a water producing pump is arranged on a connecting pipeline between the MBR system 8 and the advanced oxidation pond 9. An external reflux pipeline is connected and arranged between the MBR system 8 and the two-stage anaerobic tank 6.
The advanced oxidation pond 9 is connected with an activated carbon filter 10.
The activated carbon filter 10 is connected to a fine filter 11.
The precision filter 11 is connected with the nanofiltration system 12, and the nanofiltration system 12 is connected with the advanced oxidation tank 9 through a concentrated water return pipe.
The coagulating sedimentation air flotation tank 4, the first-section ABR anaerobic tank 5, the second-section anaerobic tank 6 and the MBR system 8 are all connected with a sludge tank 13, and the sludge tank 13 is connected with a plate-and-frame filter press 14.
All equipment and all filtering ponds in the waste acid liquid treatment system are connected through connecting pipelines, and each connecting pipeline is provided with a valve. The scheme relates to an anaerobic ABR process, an aerobic MBR process and a nanofiltration system. Adopting an anaerobic ABR process: the combination of the first-stage ABR anaerobic tank and the second-stage anaerobic tank prolongs the contact time of the wastewater and the sludge, can effectively remove COD, and greatly improves the wastewater treatment capacity. Adopting an aerobic MBR process: the retention time of the wastewater is greatly shortened, the structural size of the tank body is greatly reduced, the occupied area is reduced, and the investment is less; can remove ammonia nitrogen and refractory organic matters, thereby being beneficial to slowly proliferating microorganisms (such as nitrobacteria) and improving the nitrification efficiency of the system; due to the increase of the concentration of the activated sludge in the contact oxidation pond and the appearance of specific bacteria (particularly advantageous flora) in the sludge, the biochemical reaction efficiency is improved; has high-efficiency solid-liquid separation effect, can replace a secondary sedimentation tank, and avoids the sludge brought out by the secondary sedimentation tank from leading to effluent and COD Cr 、BOD 5 And the like. The nanofiltration system adopts a cross-flow filtration mode: the cross-flow process avoids the situation of filtration by means of a cake layer during dead-end filtration (e.g. plate and frame filter presses, drum vacuum filters), separation occurs on the membrane surface rather than in the cake layer, and thus the filtrate quality is uniform and stable throughout the process.
The treatment process of the waste acid liquid treatment system comprises the following steps: waste acid liquid produced in factory production processConveying the waste acid liquor to a reaction tank through a waste acid liquor pipe, carrying out alkali ash neutralization and precipitation treatment to remove sulfate and refractory substances in the wastewater, carrying out mud-water separation on mud residues formed by alkali neutralization through a centrifugal dehydrator, and feeding the separated sewage into an adjusting tank. The production wastewater enters the regulating tank through the production wastewater pipe to carry out homogenization regulation on the water quality and the water quantity. The effluent of the adjusting tank is pumped to a coagulating sedimentation air-floating tank by a lift pump, and Na is added into the tank 2 CO 3 And agents such as PAC, PAM and the like remove colloids and polyphenol complexes in the wastewater, reduce the content of inhibiting substances in the wastewater, and remove dispersed oil, emulsified oil and suspended matters in the wastewater through air flotation. And then lifting the wastewater to a first-stage ABR anaerobic tank through a lifting pump after the wastewater is subjected to coagulating sedimentation air flotation treatment, automatically flowing into a second-stage anaerobic tank after reaction, and removing a large amount of COD (chemical oxygen demand) under the action of anaerobic bacteria through a sludge area rich in the anaerobic bacteria. Effluent treated by the anaerobic tank automatically flows into a contact oxidation type MBR tank (a contact oxidation tank internally provided with an MBR system), BOD and COD in wastewater are removed through aerobic reaction at the front end of the MBR system, the effluent is subjected to mud-water separation through an MBR membrane group and then is lifted to an advanced oxidation tank through a water production pump, and the wastewater subjected to redox reaction in the tank enters a nanofiltration system for advanced treatment, so that the final effluent is ensured to be discharged up to the standard.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A spent acid treatment system, comprising: the equalizing basin is connected with the coagulating sedimentation air supporting pond, the coagulating sedimentation air supporting pond is connected with one section ABR anaerobism pond, one section ABR anaerobism pond is connected with two sections anaerobism ponds, two sections anaerobism ponds are connected with the catalytic oxidation pond, the catalytic oxidation pond is connected with advanced oxidation pond, advanced oxidation pond is connected with activated carbon filter, activated carbon filter is connected with precision filter, precision filter and nanofiltration headtotail, install the MBR system in the catalytic oxidation pond, the MBR system with advanced oxidation pond connects, be provided with interior backflow pipeline in the two sections anaerobism ponds, the MBR system with it is provided with outer backflow pipeline to connect between the two sections anaerobism ponds.
2. The acid pickle processing system of claim 1, further comprising a reaction tank and a centrifugal dehydrator, wherein the reaction tank is connected to the waste acid liquid pipe, the centrifugal dehydrator is connected to the reaction tank, and the adjusting tank is connected to the centrifugal dehydrator and the wastewater pipe.
3. The acid pickle treatment system of claim 2, wherein a chemical feeder is arranged on each of the reaction tank and the coagulation sedimentation flotation tank.
4. The spent acid treatment system of claim 1, wherein the coagulation sedimentation flotation tank, the primary ABR anaerobic tank, the secondary anaerobic tank, and the MBR system are all connected to a sludge tank, and the sludge tank is connected to a plate and frame filter press.
5. The spent acid treatment system of claim 1 wherein blowers are provided on both the contact oxidation tank and the MBR system.
6. The spent acid treatment system of claim 1, wherein the nanofiltration system is connected to the advanced oxidation tank via a concentrate return line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220864647.9U CN217103495U (en) | 2022-04-15 | 2022-04-15 | Waste acid liquid treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220864647.9U CN217103495U (en) | 2022-04-15 | 2022-04-15 | Waste acid liquid treatment system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217103495U true CN217103495U (en) | 2022-08-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220864647.9U Active CN217103495U (en) | 2022-04-15 | 2022-04-15 | Waste acid liquid treatment system |
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| CN (1) | CN217103495U (en) |
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- 2022-04-15 CN CN202220864647.9U patent/CN217103495U/en active Active
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