Intelligent water distribution system for automotive industrial wastewater

Abstract

The present application relates to the technical field of industrial wastewater treatment, and provides an intelligent water distribution system for automotive industrial wastewater. The water distribution system comprises a plurality of wastewater collection tanks, an equalization tank, and a control system; each of the wastewater collection tanks is in fluid communication with the equalization tank by means of an independent delivery pipeline, and each delivery pipeline is provided with a water distribution pump; and COD measurement devices are arranged downstream of at least some of the wastewater collection tanks and the equalization tank, and the water distribution pumps and the COD measurement devices are respectively electrically connected to the control system. In the present application, the control system monitors the CODs of each wastewater collection tank and the equalization tank, and controls the water distribution system to automatically complete water distribution in the equalization tank, to ensure that a stable COD in the equalization tank can be maintained, thereby effectively reducing the labor operation cost, and achieving high safety; and the universality is good, so that the cost of equipment required is low, and popularization and application are facilitated.

Description

An intelligent water distribution system for automobile industrial wastewater Technical Field

[0001] The present application relates to the technical field of industrial wastewater treatment, and in particular to an intelligent water distribution system for automobile industrial wastewater. Background Art

[0002] Industrial wastewater homogenization and proportioning mixing systems are widely used in industrial wastewater treatment processes. During the daily industrial wastewater homogenization and proportioning mixing process, the following problems will arise: industrial wastewater mixing contains high-concentration wastewater and low-concentration wastewater, and slight changes in the proportion of high-concentration wastewater will directly affect the overall concentration accuracy of the mixed wastewater, resulting in the need for additional calculations for compounding. Therefore, it is necessary to continuously test water quality indicators in the three stages of the entire water distribution process (before water distribution, during water distribution, and after water distribution) to ensure that the accuracy is within the design range. The main monitored value is COD. Currently, common industrial wastewater homogenization and proportioning mixing systems mainly include:

[0003] 1) Manual water distribution. This is the most primitive water distribution method. After the required water distribution conditions are met on-site, a manual calculation is performed based on the target COD set value of the mixed wastewater, the current wastewater inventory in each wastewater pool, and the current COD value of the wastewater pool. The required water distribution ratio for each wastewater pool is calculated through calculation. The water distribution pumps for each pool are manually turned on-site to calculate the calculated ratio and the required pump run time based on the actual water output. This water distribution method is the most cumbersome and time-consuming. Manual operation and monitoring are required before, during, and after water distribution. Manual calculations and operations have a low percentage of error, which can easily lead to accidents on-site.

[0004] 2) Semi-automatic, semi-manual water distribution. This water distribution mode is an optimized model derived from the manual water distribution mode. It manually calculates the wastewater inventory and COD value in each wastewater pool, calculates the water distribution ratio, and manually remotely activates the water distribution pumps in each pool through human-computer interaction, setting the pump operating time.

[0005] In summary, this application aims to develop an intelligent water distribution control system for automotive industrial wastewater, which can realize the automation, precision and timeliness of industrial wastewater distribution, avoid excessive error in the COD of the distributed water from the target value, effectively reduce the manpower operation cost, have high safety, good versatility, and be easy to promote and apply.

[0006] Application Contents

[0007] In view of the problems of the prior art described above, the purpose of this application is to provide an intelligent water distribution system for automobile industrial wastewater, which monitors the COD content of each wastewater collection tank and equalization tank through a control system, and controls the water distribution system to automatically complete water distribution in the equalization tank to ensure that a stable COD content can be maintained in the equalization tank.

[0008] To achieve the above-mentioned and other related purposes, the present application provides, in a first aspect, an intelligent water distribution system for automobile industrial wastewater, the water distribution system comprising a plurality of wastewater collection tanks, a homogenization tank, and a control system;

[0009] Each of the wastewater collection tanks is fluidically connected to the equalization tank through an independent delivery pipeline, and a water distribution pump is provided on the delivery pipeline; at least some of the wastewater collection tanks and the equalization tank are provided with a COD detection device, and the water distribution pump and the COD detection device are electrically connected to the control system respectively.

[0010] In one embodiment, the water distribution system includes a degreasing wastewater pool, a paint spraying wastewater pool, a film wastewater pool and an electrophoresis wastewater pool; wherein the degreasing wastewater pool and the paint spraying wastewater pool are both provided with a COD detection device.

[0011] In one embodiment, the COD detection device includes a sampling pump, a sampling water tank and a COD detector;

[0012] The wastewater collection tank is connected to the sampling pump, the sampling water tank and the COD detector in sequence, and the COD detector is used to detect the COD content of the wastewater in the sampling water tank.

[0013] As a preferred solution, the sampling water tank and the COD detector are connected through a sampling pipeline, and the water distribution system further includes a flushing water pipeline, and the flushing pipeline is connected to the sampling pipeline;

[0014] The sampling pipeline is provided with a sampling valve and a flushing valve. The sampling valve is arranged close to the COD detector and the sampling water tank, and the connecting port between the flushing water pipeline and the sampling pipeline is located between the sampling valve and the flushing valve.

[0015] In one possible implementation manner, each of the wastewater collection tanks and the equalization tank is provided with a liquid level detector, and the liquid level detector is electrically connected to the control system.

[0016] In one possible implementation, the control system includes a human-machine interaction unit and a controller that are electrically connected;

[0017] The human-computer interaction unit is used to issue control instructions to the controller;

[0018] The controller includes a control unit, which is used to receive control instructions from the human-computer interaction unit and control the operation of each water distribution pump; and is also used to receive detection data from each COD detection device and upload it to the human-computer interaction unit.

[0019] In one possible implementation, the controller is a PLC controller.

[0020] In one possible implementation, the control system further includes an alarm unit for generating an alarm when each water distribution pump or each COD detection device fails.

[0021] In one embodiment, the control system further includes a database unit for recording fault data.

[0022] In one possible implementation, the control system further includes a flow interruption detection unit for generating an alarm when each water distribution pump fails, thereby controlling the intelligent automobile industrial wastewater distribution system to stop operating.

[0023] The intelligent water distribution system for automobile industrial wastewater provided by this application has, but is not limited to, the following beneficial effects:

[0024] 1) The water distribution system of the present application monitors the COD content of each wastewater collection tank and equalization tank through a control system, and controls the water distribution system to automatically complete water distribution in the equalization tank to ensure that a stable COD content can be maintained in the equalization tank, effectively reducing the manpower operation cost, having high safety and good versatility, and requiring low equipment cost, which is convenient for promotion and application.

[0025] 2) This application provides a flushing pipeline on the sampling pipeline between the sampling water tank and the COD detector to clean the garbage in the water sample delivery pipeline of the COD detector, thereby avoiding errors in water sample detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] FIG1 is a schematic diagram showing the system connections of the water distribution system according to an embodiment of the present application.

[0027] FIG2 is a schematic diagram showing the system connection of the water distribution system with flushing pipelines according to an embodiment of the present application.

[0028] FIG3 shows a schematic diagram of the control relationship of the control system.

[0029] Explanation of Reference Numerals 1 Homogenization tank 2 Water distribution pump 3 Degreasing wastewater tank 4 Paint spraying wastewater tank 5 Membrane wastewater tank 6 Electrophoresis wastewater tank 7 Sampling pump 8 Sampling water tank 9 COD detector 10 Flushing pipeline 11 Sampling valve 12 Flushing valve 100 Control system 200 Human-computer interaction unit 300 Controller 301 Control unit 302 Alarm unit 303 Database unit 304 Interruption detection unit DETAILED DESCRIPTION

[0030] Regarding the terminology in this application: "upstream" and "downstream" are directional terms, which are customary terms in process systems and are divided into upstream and downstream according to the conveying direction or flow direction of the process medium. For example, along the flow direction of the medium, A is located downstream of B, that is, the medium enters B first and then enters A. The orientation or positional relationship indicated in this application is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the well-known technologies generally associated with commonly used industrial devices are not described in detail, and those skilled in the art who are not described can understand them according to the conventional methods in the prior art, for example, ultraviolet sterilizers can be purchased commercially. The following is an explanation of the implementation of this application by specific specific examples, and people familiar with this technology can easily understand other advantages and functions of this application from the contents disclosed in this specification.

[0031] Please refer to Figures 1-3. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are intended solely to facilitate understanding and reading by those skilled in the art, and are not intended to limit the applicable conditions for implementation of this application. Therefore, they have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in size, provided they do not affect the efficacy and objectives of this application, shall still fall within the scope of the technical content disclosed in this application.

[0032] Example 1

[0033] Referring to Figures 1-3, various embodiments provide an intelligent water distribution system for automotive industrial wastewater. The water distribution system includes multiple wastewater collection tanks, a homogenization tank 1, and a control system 100. Each wastewater collection tank is fluidically connected to the homogenization tank 1 via an independent delivery pipeline, and each delivery pipeline is equipped with a water distribution pump 2. A COD detection device is installed downstream of at least some of the wastewater collection tanks and the homogenization tank 1. The water distribution pump and the COD detection device are each electrically connected to the control system.

[0034] Specifically, the water distribution system primarily includes a degreasing wastewater tank 3, a paint spraying wastewater tank 4, a membrane wastewater tank 5, and an electrophoresis wastewater tank 6. The COD concentration in the paint spraying wastewater fluctuates significantly and cannot maintain a completely stable value. Since the paint spraying wastewater tank's actual COD data can only be recorded online through multiple daily COD tests, the actual water distribution process is prone to deviations from the target homogenization value due to the large fluctuations in the paint spraying wastewater's values. The COD concentration in the degreasing wastewater tank fluctuates less than that in the paint spraying wastewater tank and remains stable most of the time. Since the degreasing wastewater tank's actual COD data can only be recorded through daily COD tests, the target homogenization value can easily deviate due to large fluctuations in the values ​​when a sudden COD increase is encountered during the actual water distribution process. However, the COD content in the membrane wastewater tank 5 and the electrophoresis wastewater tank 6 is relatively low and stable. Water is distributed to the equalization tank via the degreasing wastewater tank 3, the paint spraying wastewater tank 4, the membrane wastewater tank 5, and the electrophoresis wastewater tank 6, ensuring the stability of the target homogenization value in the equalization tank. As mentioned above, because the COD concentration of paint wastewater fluctuates greatly and the COD of degreasing wastewater also fluctuates to a certain extent, it is preferred to install a COD detection device downstream of the degreasing wastewater pool 3 and the paint wastewater pool 4. Of course, in order to more accurately ensure the stability of the COD content in the homogenization tank 1, a COD detection device can also be installed downstream of other wastewater pools.

[0035] More specifically, referring to Figure 1, the COD detection device includes a sampling pump 7, a sampling water tank 8, and a COD detector 9. The wastewater collection tank is connected to the sampling pump 7, the sampling water tank 8, and the COD detector 9 in sequence. The COD detector 9 is used to detect the COD content of the wastewater in the sampling water tank 8. The COD detector uses a commercially available online COD detector and is connected to the control system. The data detected by the COD detector is uploaded to the control system. After the control system calculates the water distribution amount, it controls the water distribution pump 2 to pump the wastewater from the wastewater tank into the equalization tank 2 for water distribution according to the calculated water distribution amount.

[0036] In a preferred embodiment, each wastewater collection tank and equalization tank 1 is equipped with a liquid level detector, which is electrically connected to the control system. This allows for the use of proportional relationships between the tank liquid levels to coordinate water distribution to the equalization tank, thereby rationally addressing water level imbalances and preventing excessively high liquid levels in any of the wastewater collection tanks.

[0037] In a specific embodiment, the control system 100 includes an electrically connected human-computer interaction unit 200 and a controller 300. The human-computer interaction unit 200 is used to send control instructions to the controller, and the controller 300 includes a control unit 301. The control unit 301 is used to receive control instructions from the human-computer interaction unit 200 and control the operation of each water distribution pump 2. It is also used to receive detection data from each COD detection device and upload it to the human-computer interaction unit 200. Specifically, the human-computer interaction unit 200 includes a human-computer interaction interface, which is used to change the startup conditions of the wastewater intelligent wastewater system and the startup COD setting value of the industrial wastewater equalization tank according to triggering the human-computer interaction interface, and is used to trigger the liquid level height conditions for the operation of the water distribution pump 2 of each wastewater collection tank and the prohibition conditions for the operation of the water distribution pump of each wastewater collection tank.

[0038] In this embodiment, the controller 300 is preferably a PLC controller. As shown in FIG3 , the controller 300 includes a control unit 301 for controlling the operation of the water distribution pump 2 of the water collection tank according to the online COD data generated by the COD detector of each wastewater collection tank and equalization tank and the liquid level data of each industrial wastewater collection tank and equalization tank obtained from the liquid level detector. When the water distribution volume of each wastewater collection tank and equalization tank reaches the water distribution target value according to the received water distribution volume of each wastewater collection tank and equalization tank, the water distribution pump 2 of each wastewater collection tank controlled by the control unit 121 stops running. The control unit 301 in the controller 300 is composed of a virtualized executable program control instruction. The control unit 301 can realize the control method of the wastewater intelligent automatic water distribution system. The control method of the wastewater intelligent automatic water distribution system includes:

[0039] Step S110, based on triggering the wastewater automatic water distribution control instruction generated by the human-computer interaction interface, setting the equalization tank start COD setting value on the human-computer interaction interface, or generating the wastewater collection tank water distribution amount calculation control instruction based on the wastewater equalization tank start liquid level setting value, controls the generation of the wastewater collection tank required water distribution amount and the wastewater collection tank required water distribution control instruction;

[0040] Step S120, controlling the operation of the water distribution pump for the wastewater collection tank according to the water distribution instruction required by the wastewater collection tank and the water distribution amount required by the collection tank generated by triggering the human-computer interaction interface;

[0041] Step S130, according to the target COD numerical control instruction of the industrial wastewater equalization tank configured in the human-computer interaction interface, the intelligent automatic water distribution of this wastewater is controlled to be completed.

[0042] The above steps S110 to S130 are a step-by-step sequence, that is, if the condition of S110 is met, step S120 is performed, if the condition of S120 is met, step S130 is performed, and if the condition of S130 is met, step S110 is reset to the previous step.

[0043] In this embodiment, as shown in FIG3 , the controller 300 further includes an alarm unit 302 for generating an alarm when the water distribution pump 2 of each wastewater collection tank stops or when the water distribution system of each wastewater collection tank and equalization tank fails.

[0044] In this embodiment, as shown in FIG3 , the controller 300 further includes: a database unit 303 for recording operation data and fault data of the wastewater collection tank and the wastewater equalization tank water distribution system.

[0045] In this embodiment, as shown in FIG3 , the controller 300 further includes a flow interruption detection unit 123 for detecting the stoppage of the water distribution pump 2 of each wastewater collection tank, and controlling the wastewater intelligent automatic water distribution system to stop operating when the water distribution pump 2 stops operating.

[0046] Example 2

[0047] A domestic automobile manufacturing plant's wastewater station currently has an intelligent water distribution system for automobile industrial wastewater, which is used for intelligent distribution of automobile industrial wastewater such as paint spraying wastewater and degreasing wastewater to the industrial wastewater equalization tank process.

[0048] 1. System internal control parameters:

[0049] 1) The main water quality internal control parameters of the system are:

[0050] 2) Overview of paint spraying wastewater pool

[0051] It is equipped with 2 water distribution pumps (specification LP80-125 / 133A-F-ABUBEQ=57, H=18, 4.0KW), 1 set of analog liquid level meter specification MPM416W (0~5.5MH2O)`7`E`22, and COD online detector.

[0052] Paint spraying wastewater pool setting parameters:

[0053] The average COD of paint wastewater is 7500~12000mg / L

[0054] 3) Overview of degreasing wastewater pool

[0055] It is equipped with 2 water distribution pumps (specification LP80-125 / 133A-F-ABUBEQ=57, H=18, 4.0KW), 1 set of analog liquid level meter specification MPM416W (0~5.5MH2O)`7`E`22, and COD online detector.

[0056] Degreasing wastewater tank setting parameters:

[0057] The average COD of degreasing wastewater is 2100~4000mg / L.

[0058] 4) Overview of membrane wastewater pool

[0059] Equipped with 2 water distribution pumps (specification LP80-125 / 133A-F-ABUBEQ=57, H=18, 4.0KW), equipped with 1 set of analog liquid level meter (specification MPM416W (0~5.5MH2O)`7`E`22), equipped with COD online detector membrane wastewater tank setting parameters:

[0060] The average COD of membrane wastewater is 100-500 mg / L. 5) Overview of electrophoresis wastewater pool

[0061] Two water distribution pumps (specification LP80-125 / 133A-F-ABUBEQ=57, H=18, 4.0KW) are provided, along with one set of analog level gauge specification MPM416W (0~5.5MH2O)`7`E`22 and COD online detection data equipment.

[0062] Electrophoresis wastewater pool setting parameters:

[0063] The average COD of the electrophoresis wastewater pool is 100-500 mg / L.

[0064] Basic control principle: Set the target COD value Ct for homogenization, and automatically calculate the amount of degreasing wastewater, paint spraying wastewater, electrophoresis wastewater and film wastewater that needs to be pumped into the homogenization tank based on the existing water volume for homogenization and the online COD of the five wastewater tanks.

[0065] The above description of the embodiments is intended to facilitate understanding and application of the present application by those skilled in the art. It will be apparent that those skilled in the art can readily make various modifications to these embodiments and apply the general principles described herein to other embodiments without expending any creative effort. Therefore, the present application is not limited to the embodiments described herein, and improvements and modifications made by those skilled in the art based on the disclosure of this application without departing from the scope and spirit of this application are within the scope of this application.

Claims

1. An intelligent water distribution system for automobile industrial wastewater, characterized in that, The water distribution system includes a plurality of wastewater collection pools, an equalization tank (1), and a control system (100); Each of the wastewater collection pools is fluidly connected to the equalization tank (1) through an independent conveying pipeline, and a water distribution pump (2) is provided on each conveying pipeline; COD detection devices are provided downstream of at least part of the wastewater collection pools and the equalization tank (1), and the water distribution pumps and the COD detection devices are electrically connected to the control system respectively.

2. The intelligent water distribution system for automobile industrial wastewater according to claim 1, wherein The water distribution system includes a degreasing wastewater tank (3), a painting wastewater tank (4), a film wastewater tank (5), and an electrophoresis wastewater tank (6); Among them, COD detection devices are provided downstream of the degreasing wastewater tank (3) and the painting wastewater tank (4).

3. The intelligent water distribution system for automobile industrial wastewater according to claim 1, characterized in that, The COD detection device includes a sampling pump (7), a sampling water tank (8), and a COD detector (9); The wastewater collection pool is sequentially connected to the sampling pump (7), the sampling water tank (8), and the COD detector (9), and the COD detector (9) is used to detect the COD content of the wastewater in the sampling water tank (8).

4. The intelligent water distribution system for automobile industrial wastewater according to claim 3, characterized in that The sampling water tank (8) and the COD detector (9) are connected through a sampling pipeline; The water distribution system further includes a flushing water pipeline (10), and the flushing pipeline (10) is connected to the sampling pipeline; A sampling valve (11) and a flushing valve (12) are provided on the sampling pipeline. The sampling valve (11) is arranged close to the COD detector (9), the sampling valve (11) is arranged close to the sampling water tank (8), and the connection port of the flushing water pipeline (10) and the sampling pipeline is located between the sampling valve (11) and the flushing valve (12).

5. The intelligent water distribution system for automobile industrial wastewater according to claim 1, characterized in that, A liquid level detector is provided in each of the wastewater collection pools and the equalization tank (1), and the liquid level detector is electrically connected to the control system.

6. The intelligent water distribution system for automobile industrial wastewater according to claim 1, characterized in that, The control system (100) includes a human-machine interaction unit (200) and a controller (300) which are electrically connected; The human-machine interaction unit (200) is used to send control instructions to the controller; The controller (300) includes a control unit (301). The control unit (301) is used to receive control instructions from the human-machine interaction unit (200) and control the operation of each water distribution pump (2); it is also used to receive the detection data of each COD detection device and upload it to the human-machine interaction unit (200).

7. The intelligent water distribution system for automobile industrial wastewater according to claim 6, wherein The controller (300) is a PLC controller.

8. The intelligent water distribution system for automobile industrial wastewater according to claim 6, characterized in that, The control system further includes an alarm unit (302) for alarming when any of the water distribution pumps (2) or the COD detection devices fails.

9. The intelligent water distribution system for automotive industrial wastewater according to claim 8, characterized in that The control system further includes a database unit (303) for recording fault data.

10. The intelligent water distribution system for automobile industrial wastewater according to claim 8, characterized in that, The control system further includes a flow interruption detection unit (304) for alarming when any of the water distribution pumps fails and controlling the intelligent water distribution system for automotive industry wastewater to stop running.

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