Intelligent water distribution system for automobile industrial wastewater

Abstract

The utility model provides an intelligent water distribution system for automobile industrial wastewater, and belongs to the technical field of industrial wastewater treatment.The water distribution system comprises a plurality of wastewater collecting pools, a homogenizing pool and a control system, all the wastewater collecting pools are in fluid communication with the homogenizing pool through independent conveying pipelines, and water distribution pumps are arranged on the conveying pipelines; cOD (Chemical Oxygen Demand) detection devices are arranged at the downstream parts of at least part of the wastewater collecting tank and the homogenizing tank, and the water distribution pump and the COD detection devices are electrically connected with the control system respectively. According to the application, the COD content of each wastewater collecting tank and the homogenizing tank is monitored through the control system, and the water distribution system is controlled to automatically complete water distribution in the homogenizing tank, so that the stable COD content can be maintained in the homogenizing tank, the manual operation cost is effectively reduced, the safety is high, the universality is good, the cost of the required equipment is low, and the popularization and application are convenient.

Description

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. In 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. At present, common industrial wastewater homogenization and proportioning mixing systems mainly include:

[0003] 1) Manual water distribution. This is the most primitive water distribution method, that is, after the conditions for water distribution are met on site, the target COD setting value of the mixed wastewater, the current wastewater inventory of each wastewater pool and the current COD value of the wastewater pool are calculated manually. The required water distribution ratio of each wastewater pool is calculated by calculating, and the water distribution pumps of each pool are manually turned on on site to calculate the calculated ratio. The required running time of the pump is calculated based on the actual water volume of the pump. This water distribution method is the most cumbersome and takes a long time to distribute water. Before, during and after water distribution, manual operation and monitoring are required. There is a minimum error percentage in manual calculation and operation, which can easily lead to accidents on site.

[0004] 2) Semi-automatic and semi-manual water distribution. This water distribution mode is an optimization mode derived from the manual water distribution mode. That is, the wastewater inventory and COD value in each wastewater pool are manually calculated and judged, the water distribution ratio is calculated, and the water distribution pumps of each pool are manually remotely started through human-computer interaction, and the running time of the water distribution pumps is set.

[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 distribution distance from the target value, effectively reduce the manpower operation cost, have high safety and good versatility, and be easy to promote and apply. Utility Model Content

[0006] In view of the problems of the prior art mentioned above, the purpose of the present 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 the water distribution in the equalization tank to ensure that a stable COD content can be maintained in the equalization tank.

[0007] 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;

[0008] 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.

[0009] In one possible implementation, 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.

[0010] In one possible implementation, the COD detection device includes a sampling pump, a sampling water tank and a COD detector;

[0011] The wastewater collection pool 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.

[0012] As a preferred solution, the sampling water tank and the COD detector are connected via a sampling pipeline, and the water distribution system further comprises a flushing pipeline, which is connected to the sampling pipeline;

[0013] The sampling pipeline is provided with a sampling valve and a flushing valve, the sampling valve is arranged close to the COD detector, the sampling valve is arranged close to the sampling water tank, and the connecting port between the flushing pipeline and the sampling pipeline is located between the sampling valve and the flushing valve.

[0014] 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.

[0015] In one possible implementation, the control system includes an electrically connected human-machine interaction unit and a controller;

[0016] The human-computer interaction unit is used to issue control instructions to the controller;

[0017] The controller comprises 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.

[0018] In one possible implementation, the controller is a PLC controller.

[0019] In one possible implementation manner, the control system further comprises an alarm unit for generating an alarm when a failure occurs in each water distribution pump or each COD detection device.

[0020] In one possible implementation manner, the control system further includes a database unit for recording fault data.

[0021] In one possible implementation mode, the control system further includes a flow interruption detection unit for generating an alarm when each water distribution pump fails, thereby controlling the intelligent water distribution system for automobile industrial wastewater to stop operating.

[0022] The intelligent water distribution system for automobile industrial wastewater provided in this application has but is not limited to the following beneficial effects:

[0023] 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 the 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, with high safety and good versatility, and the required equipment cost is low, which is easy to promote and apply.

[0024] 2) The present 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

[0025] Figure 1 Shown is a system connection diagram of the water distribution system described in an embodiment of the present application.

[0026] Figure 2 Shown is a system connection diagram with a flushing pipeline for the water distribution system described in an embodiment of the present application.

[0027] Figure 3 Displayed is a schematic diagram of the control relationship of the control system.

[0028] Description of Reference Numerals

[0029] 1 Homogenization tank

[0030] 2 Water distribution pump

[0031] 3 Degreasing wastewater pool

[0032] 4 Paint spraying wastewater pool

[0033] 5 Membrane wastewater tank

[0034] 6 Electrophoresis wastewater pool

[0035] 7 Sampling pump

[0036] 8 Sampling water tank

[0037] 9 COD detector

[0038] 10 Flushing lines

[0039] 11 Sampling valve

[0040] 12 Flush valve

[0041] 100 Control Systems

[0042] 200 Human-computer interaction unit

[0043] 300 Controller

[0044] 301 Control Unit

[0045] 302 Alarm Unit

[0046] 303 Database Unit

[0047] 304 Break Detection Unit DETAILED DESCRIPTION

[0048] Regarding the terminology in this application: "upstream" and "downstream" are directional words, 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 the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the well-known technologies usually 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, such as ultraviolet sterilizers can be purchased commercially. The following is an explanation of the implementation of the present application by specific specific examples, and those familiar with this technology can easily understand other advantages and functions of the present application from the contents disclosed in this specification.

[0049] Please see attached Figure 1-3 It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the restrictive conditions for the implementation of this application. Therefore, they have no substantive technical significance. Any modification of the structure, change in the proportion relationship or adjustment of the size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0050] Example 1

[0051] See also Figures 1 to 3 Each embodiment provides an intelligent water distribution system for automobile industrial wastewater, and the water distribution system includes multiple wastewater collection tanks, a homogenization tank 1, and a control system 100. Each wastewater collection tank is in fluid communication with the homogenization tank 1 through an independent delivery pipeline, and a water distribution pump 2 is provided on the delivery pipeline, and a COD detection device is provided downstream of at least some of the wastewater collection tanks and the homogenization tank 1, and the water distribution pump and the COD detection device are electrically connected to the control system respectively.

[0052] Specifically, the water distribution system mainly includes a degreasing wastewater pool 3, a paint spraying wastewater pool 4, a film wastewater pool 5 and an electrophoresis wastewater pool 6. Among them, the COD concentration of the paint spraying wastewater fluctuates greatly and cannot be completely in a stable value. Since the actual COD online data of the paint spraying wastewater pool can only be recorded by artificial COD detection multiple times a day, the actual water distribution process is prone to the problem of deviation in the homogenization target value due to the large fluctuation value of the paint spraying wastewater. The COD concentration of the degreasing wastewater pool fluctuates less than that of the paint spraying wastewater pool, and can be in a stable value most of the time. Since the actual COD data of the degreasing wastewater pool can only be recorded by artificial COD detection every day, the actual water distribution process encounters a sudden increase in COD, which is prone to the problem of deviation in the homogenization target value due to large fluctuation values. The COD content in the film wastewater pool 5 and the electrophoresis wastewater pool 6 is less and more stable, and water is distributed to the homogenization pool through the fat wastewater pool 3, the paint spraying wastewater pool 4, the film wastewater pool 5 and the electrophoresis wastewater pool 6 to ensure the stability of the homogenization target value of the homogenization pool. As mentioned above, because the COD concentration of paint spraying wastewater fluctuates greatly and the COD of degreasing wastewater also fluctuates to a certain extent, it is preferred to install COD detection devices downstream of the degreasing wastewater pool 3 and the paint spraying 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.

[0053] More specifically, see 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 in the wastewater pool into the equalization tank 2 for water distribution according to the calculated water distribution amount.

[0054] In a preferred embodiment, each wastewater collection tank and the equalization tank 1 are provided with a liquid level detector, and the liquid level detector is electrically connected to the control system. That is, the water distribution of the equalization tank can be coordinated by taking the proportion of the liquid level height of the water tank to reasonably solve the problem of water volume height imbalance, so that the wastewater collection tank will not have the problem of excessively high liquid level in a certain water tank.

[0055] In a specific example, the control system 100 includes an electrically connected human-machine interaction unit 200 and a controller 300. The human-machine interaction unit 200 is used to send control instructions to the controller, and the controller 300 includes a control unit 301, and 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, and is also used to receive the detection data of each COD detection device and upload it to the human-machine interaction unit 200. Specifically, the human-machine interaction unit 200 includes a human-machine 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 the triggering of the human-machine interaction interface, and is used to trigger the liquid level height conditions for the distribution pump 2 of each wastewater collection tank to allow the operation and the prohibition conditions for the distribution pump of each wastewater collection tank to prohibit the operation.

[0056] In this embodiment, the controller 300 is preferably a PLC controller, such as Figure 3 As shown, the controller 300 includes a control unit 301, which is used to control 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 the equalization tank and the liquid level data of each industrial wastewater collection tank and the equalization tank obtained from the liquid level detector. When the water distribution volume of each wastewater collection tank and the equalization tank reaches the water distribution target value according to the received water distribution volume of each wastewater collection tank and the 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 executable program control instructions virtualized, and the control unit 301 can realize the control method of the wastewater intelligent automatic water distribution system, and the control method of the wastewater intelligent automatic water distribution system includes:

[0057] Step S110, according to the wastewater automatic water distribution control instruction generated by triggering the human-computer interaction interface, setting the COD setting value for starting the equalization tank in the human-computer interaction interface, or generating the wastewater collection tank water distribution amount calculation control instruction according to the starting liquid level setting value of the wastewater equalization tank, controlling the generation of the wastewater collection tank required water distribution amount and the wastewater collection tank required water distribution control instruction;

[0058] Step S120, controlling the operation of the water distribution pump for the wastewater collection according to the water distribution instruction required for the wastewater collection tank and the water distribution amount required for the collection tank generated by triggering the human-computer interaction interface;

[0059] 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.

[0060] The above steps S110 to S130 are a step-by-step sequence, that is, if S110 satisfies a condition, S120 is performed, if S120 satisfies a condition, S130 is performed, and if S130 satisfies a condition, it is reset to step S110.

[0061] In this embodiment, if Figure 3 As shown, the controller 300 also includes an alarm unit 302, which is used to alarm when the water distribution pump 2 of each wastewater collection tank stops or the water distribution system of each wastewater collection tank and equalization tank fails.

[0062] In this embodiment, if Figure 3 As shown, the controller 300 also includes: a database unit 303, which is used to record the operation data and fault data of the wastewater collection tank and the wastewater equalization tank water distribution system.

[0063] In this embodiment, if Figure 3 As shown, the controller 300 further includes a flow interruption detection unit 123 for detecting the stoppage status 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.

[0064] Example 2

[0065] A domestic automobile manufacturing plant's wastewater station currently has an intelligent water distribution system for automobile industrial wastewater, which is used for the intelligent distribution of automobile industrial wastewater such as paint spraying wastewater and degreasing wastewater to the industrial wastewater equalization tank process.

[0066] 1. System internal control parameters:

[0067] 1) The main water quality internal control parameters of the system are:

[0068]

[0069] 2) Overview of paint spraying wastewater pool

[0070] It is equipped with 2 water distribution pumps (specification LP80-125 / 133A-FA BUBEQ=57, H=18, 4.0KW), 1 set of analog liquid level meter specification MPM416W (0~5.5MH2O)`7`E`22, and COD online detector.

[0071] Paint spraying wastewater pool setting parameters:

[0072] The average COD of paint wastewater is 7500~12000mg / L

[0073] 3) Overview of degreasing wastewater pool

[0074] It is equipped with 2 water distribution pumps (specification LP80-125 / 133A-FA BUBEQ=57, H=18, 4.0KW), 1 set of analog liquid level meter specification MPM416W (0~5.5MH2O)`7`E`22, and COD online detector.

[0075] Degreasing wastewater tank setting parameters:

[0076] The average COD of degreasing wastewater is 2100~4000mg / L.

[0077] 4) Overview of membrane wastewater pool

[0078] Equipped with 2 water distribution pumps (specification LP80-125 / 133A-FA BUBEQ=57, H=18, 4.0KW), 1 set of analog liquid level meter (specification MPM416W (0~5.5MH2O)`7`E`22), and COD online detector. Membrane wastewater tank setting parameters:

[0079] The average COD of membrane wastewater is 100-500 mg / L. 5) Overview of electrophoresis wastewater pool

[0080] Two water distribution pumps (specification LP80-125 / 133A-FA BUBEQ=57, H=18, 4.0KW) are provided, as well as one set of analog liquid level meter specification MPM416W (0~5.5MH2O)`7`E`22, and COD online detection data equipment.

[0081] Electrophoresis wastewater pool setting parameters:

[0082] The average COD of the electrophoresis wastewater pool is 100-500 mg / L.

[0083] 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.

[0084] The above description of the embodiments is to facilitate those of ordinary skill in the art to understand and apply the present application. It is obvious that those familiar with the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without having to pay creative labor. Therefore, the present application is not limited to the embodiments herein, and improvements and modifications made by those skilled in the art based on the contents disclosed in the present application without departing from the scope and spirit of the present application are within the scope of the present application.

Claims

1. An intelligent water distribution system for automobile industrial wastewater, characterized in that: The water distribution system comprises a plurality of wastewater collection tanks, a homogenization tank (1) and a control system (100); Each of the wastewater collection tanks is in fluid communication with the homogenization tank (1) via an independent delivery pipeline, and each delivery pipeline is provided with a water distribution pump (2); At least part of the wastewater collection tank and the downstream of the homogenization tank (1) are provided with a COD detection device, and the water distribution pump and the COD detection device are respectively electrically connected to the control system.

2. The intelligent water distribution system for automobile industrial wastewater according to claim 1 is characterized in that: The water distribution system comprises a degreasing wastewater pool (3), a paint spraying wastewater pool (4), a film wastewater pool (5) and an electrophoresis wastewater pool (6); Wherein, a COD detection device is provided downstream of the degreasing wastewater pool (3) and the paint spraying wastewater pool (4).

3. The intelligent water distribution system for automobile industrial wastewater according to claim 1 is characterized in that: The COD detection device comprises a sampling pump (7), a sampling water tank (8) and a COD detector (9); The wastewater collection tank is connected in sequence 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 is characterized in that: The sampling water tank (8) and the COD detector (9) are connected via a sampling pipeline; The water distribution system further comprises a flushing pipeline (10), wherein the flushing pipeline (10) is connected to the sampling pipeline; The sampling pipeline is provided with a sampling valve (11) and a flushing valve (12); 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 connecting port between the flushing 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 is characterized in that: Each of the wastewater collection tanks and the homogenization tank (1) is provided with a liquid level detector, 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 is characterized in that: The control system (100) comprises a human-machine interaction unit (200) and a controller (300) which are electrically connected; The human-machine interaction unit (200) is used to issue a control instruction to the controller; The controller (300) comprises a control unit (301), wherein 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); and is also used to receive detection data from 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 is characterized in that: The controller (300) is a PLC controller.

8. The intelligent water distribution system for automobile industrial wastewater according to claim 6 is characterized in that: The control system further comprises an alarm unit (302) for generating an alarm when a failure occurs in any water distribution pump (2) or any COD detection device.

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

10. The intelligent water distribution system for automobile industrial wastewater according to claim 8 is characterized in that: The control system also includes a flow interruption detection unit (304) for giving an alarm when a water distribution pump fails, thereby controlling the intelligent water distribution system for automobile industrial wastewater to stop operating.

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