Treatment device for coating wastewater of automobile leather

Abstract

The utility model discloses a treatment device for coating wastewater of automobile leather. The system at least comprises a water collecting tank for directly collecting production wastewater from a workshop, an adjusting tank, a coagulative precipitation tank, a hydrolysis acidification tank, a primary sedimentation tank, an aerobic tank A, an anoxic tank A, an anoxic tank B, an aerobic tank B, a TMBR device, an intermediate water tank, an activated carbon adsorption device, a clear water tank and a discharge water tank which are sequentially communicated in the water flow direction. The water collecting tank is provided with a monitoring device for monitoring the liquid level in the tank and / or a flow device for monitoring the discharge speed of the production wastewater; the treatment device further comprises an accident tank which is used for temporarily storing the production wastewater when the monitoring device and / or the flow device early warns, and the accident tank is communicated with the water collecting tank and the adjusting tank through a first pipeline and a second pipeline respectively.

Description

Technical Field

[0001] The utility model relates to a sewage treatment device, in particular to a treatment device for automobile leather finishing wastewater. Background Art

[0002] In the production of automobile leather finishing process, the wastewater generated by spray room flushing and spray room and cleaning of finishing agent containers has the characteristics of complex composition, high organic load and great difficulty in treatment. Since the traditional wastewater of the leather industry is mostly comprehensive wastewater, and most of it comes from the previous process, its water quality characteristics are significantly different from pure finishing process wastewater.

[0003] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content

[0004] The purpose of the utility model is to provide a treatment device for automobile leather finishing wastewater, which can operate stably, be easy to manage, run normally, stabilize the effluent water quality, reduce the land occupation and facility investment of the front-end regulating tank, and reduce the impact of the incoming water quality on subsequent discharge.

[0005] To achieve the above-mentioned purpose, the utility model provides a treatment device for automobile leather finishing wastewater, which at least comprises a water collection tank, a regulating tank, a coagulation sedimentation tank, a hydrolysis acidification tank, a settling tank, an aerobic tank A, an anoxic tank A, an anoxic tank B, an aerobic tank B, a TMBR device, an intermediate water tank, an activated carbon adsorption device, a clean water tank, and a discharge water tank, which are sequentially connected and arranged along the water flow direction for directly collecting production wastewater from a workshop, and is characterized in that the water collection tank is provided with a monitoring device for monitoring the liquid level in the tank and / or a flow device for monitoring the discharge speed of production wastewater;

[0006] The treatment device also includes an emergency tank for temporarily storing production wastewater when the monitoring device and / or the flow device issues an alarm. The emergency tank is connected to the water collection tank and the regulating tank through the first pipeline and the second pipeline respectively.

[0007] In one or more embodiments, at least the first pipeline of the first pipeline and the second pipeline is provided with a check device for limiting the flow of the produced wastewater in the pipeline in a single direction.

[0008] In one or more embodiments, the check device is a solenoid valve communicatively connected to a control device, and the control device is communicatively connected to a monitoring device and / or a flow device.

[0009] In one or more embodiments, the control device is a PLC controller.

[0010] In one or more embodiments, the monitoring device is a digital liquid level meter (such as HJK-209 immersion liquid level transmitter, etc.).

[0011] In one or more embodiments, the flow device is a digital flow meter (such as Zhizhuochuan ultrasonic flow meter, etc.).

[0012] In one or more embodiments, the coagulation sedimentation tank and / or the hydrolysis acidification tank is also connected to a dosing device for transporting additives.

[0013] In one or more embodiments, the dosing device includes at least one dosing unit, which includes

[0014] A medicine storage bin having a storage space for storing medicines;

[0015] The delivery pipe is connected to the storage space and is used to transfer the medicine therein to any one of the coagulation sedimentation tank and the coagulation flotation tank.

[0016] In one or more embodiments, the delivery tube is further provided with a metering device, which is used to weigh the mass of the currently delivered medicine in real time.

[0017] Compared with the prior art, the treatment device for automobile leather finishing wastewater according to the utility model can control the sludge concentration of the biochemical system according to the concentrated water discharge of the TMBR when the incoming water quality fluctuates during daily operation, and is no longer affected by sludge swelling or sludge concentration being affected by sedimentation effect. It can freely control the compliance and sludge age, and has a strong adaptability to automobile leather finishing wastewater that is difficult to degrade and has certain aquatic microbial toxicity, and can ensure that the effluent is stable and qualified. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram according to an implementation mode of the utility model. DETAILED DESCRIPTION

[0019] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0020] Unless explicitly stated otherwise, throughout the specification and claims, the term “comprise” or variations such as “include” or “comprising”, etc., will be understood to include the stated elements or components but not to exclude other elements or components.

[0021] The sewage treatment process of the treatment device of the utility model is that the incoming water passes through a mechanical grille to a water collection tank and then to a regulating tank for homogenization, and then passes through a coagulation sedimentation tank to add medicine (the dosing adopts a dosing unit, and the dosing unit includes a medicine storage bin, which has a storage space for storing medicines; a delivery pipe, which is connected to the storage space, and is used to transfer and transport the medicine therein to the coagulation sedimentation tank) to remove suspended particles and insoluble organic matter in the wastewater, and then enters a coagulation flotation tank to add medicine (the dosing adopts a dosing unit, and the dosing unit includes a medicine storage bin, which has a storage space for storing medicines; a delivery pipe, which is connected to the storage space, and is used to transfer and transport the medicine therein to the coagulation flotation tank, and the amount of medicine added is weighed in real time by an electronic scale and fed back to a PLC controller for monitoring) for complete dissolved air flotation treatment (the solid waste obtained from the coagulation sedimentation tank and the coagulation flotation tank passes through a sludge tank and then enters a plate and frame filter press for solid-liquid separation treatment , and then the attached waste is transported out for treatment, and the dosage is weighed in real time by an electronic scale and fed back to the PLC controller for monitoring), and then enters the hydrolysis and acidification tank for hydrolysis and acidification, and the macromolecular pollutants are decomposed into small molecules, and the sludge is returned to a sedimentation tank, and the supernatant enters the aerobic tank A for aeration and decomposition of pollutants with the biochemical bacterial flocs in the tank. The mixed liquid enters the anoxic tank A and reaches the anoxic tank B through the mixing action of the underwater flow propeller under the condition of consuming dissolved oxygen. In the anoxic environment, the bacterial flocs and the pollutants produce biological decomposition and metabolic reactions to remove pollutants in the water, and then aeration is repeated through the aerobic tank B to decompose the pollutants with the biochemical bacterial flocs in the tank. Finally, the TMBR device is used for mud and water separation, and the clean water passes through the intermediate water tank and finally the activated carbon adsorption device removes a part of the pollutants that cannot be biologically treated and enters the clean water tank for reuse and production, and the remaining treated wastewater passes through the discharge pool and meets the discharge standards.

[0022] Example 1

[0023] This embodiment adopts a treatment process based on "coagulation and sedimentation + flotation + two-stage A / O + TMBR + activated carbon".

[0024] After the production wastewater from the workshop is collected through the water collection tank, a digital level meter is installed in the water collection tank to monitor the liquid level in the tank, and a digital flow meter is installed in the water inlet pipe of the water collection tank to monitor the input flow, and the diaphragm pump is used to pump it to the regulating tank. When the monitoring warning occurs, that is, the water volume in the front section is too large or an accident occurs in the back end, the PLC control automatically controls the solenoid valves of each pipeline to automatically switch, so that the valve can be switched to pump the wastewater into the accident tank first, and then the solenoid valve is switched again after returning to normal to gradually add the wastewater in the accident tank to the regulating tank; of course, it can also be transported for treatment when it is unable to be treated or cannot be restored in the short term.

[0025] The regulating tank is equipped with air stirring and underwater agitator to stir the wastewater evenly, and then it is pumped into the subsequent pretreatment system by a lifting pump, and a flow meter is provided to monitor the flow rate.

[0026] In the pretreatment area, the wastewater first reacts in the coagulation reaction tank by adding chemicals, and then the mud and water are separated in the coagulation sedimentation tank, so that the suspended matter in the water can be precipitated and removed, and the effluent then enters the flotation system. In the flotation system, similarly, the wastewater first reacts in the flotation reaction tank by adding chemicals, and then enters the coagulation flotation tank. The scum in the water floats to the water surface under the action of gas and is removed by the scraper.

[0027] The wastewater then enters the hydrolysis and acidification tank for hydrolysis and acidification to decompose large molecular pollutants into small molecules, and then returns the sludge to the first sedimentation tank. The supernatant enters the aerobic tank A for aeration and decomposes the pollutants with the biochemical bacterial flocs in the tank. The mixed liquid enters the anoxic tank A and is mixed by the underwater flow propeller. Under the condition of consuming dissolved oxygen, it reaches the anoxic tank B, where the bacterial flocs and the pollutants produce biological decomposition and metabolic reactions to remove pollutants in the water. Then, aeration is repeated in the aerobic tank B to decompose the pollutants with the biochemical bacterial flocs in the tank. Through the alternation of anoxic and aerobic conditions, the organic matter in the wastewater is further degraded, and the nitrogen and phosphorus in the wastewater are further removed.

[0028] A TMBR raw water pump is installed at the end of aerobic pool B. Under the control of liquid level, the raw water pump starts at irregular intervals. When the raw water pump starts, the subsequent TMBR system can be turned on with one button to separate mud and water. The effluent enters the intermediate water pool for temporary storage, and the mixed liquid flows back to the front biochemical pool.

[0029] The intermediate water pool is lifted by the lifting pump to the activated carbon adsorption tank. Through the adsorption of activated carbon, organic matter and other substances in the water are further removed, and the water is disinfected and sterilized by the pipeline UV sterilizer before being stored in the clean water tank for reuse or discharge.

[0030] The water flows from the discharge pool to the comprehensive pool by gravity, and then is sent to the monitoring well through a forced discharge pump to receive sampling and analysis by online monitoring equipment before being discharged into the municipal sewage network after meeting the standards.

[0031] In summary, a method for treating automobile leather finishing wastewater reduces the risk of environmental pollution. The present invention overcomes the disadvantages of the prior art that the quality and quantity of incoming water cannot be greatly fluctuated and a large-volume regulating tank cannot be added on site, resulting in the effluent not being able to stably meet the discharge standards.

[0032] The foregoing description of specific exemplary embodiments of the utility model is for the purpose of illustration and illustration. These descriptions are not intended to limit the utility model to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the utility model and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the utility model and various different options and changes. The scope of the utility model is intended to be defined by the claims and their equivalents.

Claims

1. A treatment device for automobile leather finishing wastewater, comprising at least a water collection tank, a regulating tank, a coagulation sedimentation tank, a hydrolysis acidification tank, a settling tank, an aerobic tank A, an anoxic tank A, an anoxic tank B, an aerobic tank B, a TMBR device, an intermediate water tank, an activated carbon adsorption device, a clean water tank, and a discharge water tank, which are sequentially connected and arranged along the water flow direction for directly collecting production wastewater from a workshop, characterized in that: The water collection tank is provided with a monitoring device for monitoring the liquid level in the tank and / or a flow device for monitoring the discharge rate of the production wastewater; The treatment device also includes an emergency tank for temporarily storing production wastewater when the monitoring device and / or flow device issues an alarm, and the emergency tank is connected to the water collection tank and the regulating tank through a first pipeline and a second pipeline respectively.

2. The treatment device for automobile leather finishing wastewater according to claim 1, characterized in that: At least the first pipeline of the first pipeline and the second pipeline is provided with a check device for limiting the flow of production wastewater in the pipeline in a single direction.

3. The treatment device for automobile leather finishing wastewater according to claim 2, characterized in that: The check device is a solenoid valve that is communicatively connected to a control device, and the control device is communicatively connected to the monitoring device and / or the flow device.

4. The treatment device for automobile leather finishing wastewater according to claim 3, characterized in that: The control device is a PLC controller.

5. The treatment device for automobile leather finishing wastewater according to claim 1 or 3, characterized in that: The monitoring device is a digital liquid level meter.

6. The treatment device for automobile leather finishing wastewater according to claim 1 or 3, characterized in that: The flow device is a digital flow meter.

7. The treatment device for automobile leather finishing wastewater according to claim 1, characterized in that: The coagulation sedimentation tank and / or the hydrolysis acidification tank is also connected to a dosing device for conveying additives.

8. The treatment device for automobile leather finishing wastewater according to claim 7, characterized in that: The dosing device comprises at least one dosing unit, the dosing unit comprising A medicine storage bin having a storage space for storing medicines; A delivery pipe is connected to the storage space and is used to transfer the medicine therein to any one of the coagulation sedimentation tank and the coagulation flotation tank.

9. The treatment device for automobile leather finishing wastewater according to claim 8, characterized in that: The delivery tube is also provided with a metering device, which is used to weigh the mass of the medicine currently being delivered in real time.

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