Intelligent dosing device

Abstract

The utility model provides an intelligent dosing device, which belongs to the technical field of dosing systems of sewage treatment plants and comprises a carbon source dosing module, a PAC dosing module, monitoring equipment and a control module, the carbon source dosing module is provided with a carbon source storage tank, the PAC dosing module is provided with a PAC stock solution tank and a PAC solution tank, and the carbon source storage tank and the PAC solution tank are both connected with a plant dosing pipe through a multi-stage dosing pipeline. A metering control module is arranged on the multi-stage dosing pipeline, the control module obtains the dosing amount of each pipeline in the multi-stage dosing pipeline through the metering control module, and meanwhile, the control module also obtains part of indexes of inlet and outlet water quality and water quantity through monitoring equipment, so that the currently required dosing amount of a carbon source and PAC can be analyzed; and the dosing amount is controlled by the metering control module, so that the dosing amount is adjusted according to the water inlet amount of on-site sewage and the change of the effluent quality, and the effluent quality is ensured to reach the standard.

Description

Technical Field

[0001] The utility model belongs to the technical field of dosing systems in sewage treatment plants, and in particular relates to an intelligent dosing device. Background Art

[0002] Effluent TN and effluent TP are important evaluation indicators of effluent quality in sewage treatment plants. According to existing research, accurate addition of carbon source and PAC is one of the conditions to ensure that effluent TN and effluent TP meet the standards.

[0003] However, the existing PAC and carbon source dosing can only be done by the process technicians of the sewage treatment plant based on their experience, and the dosage cannot be adjusted in real time according to the inflow and water quality changes of the on-site sewage, resulting in waste of dosage or unstable effluent quality or even the risk of exceeding the standard. Utility Model Content

[0004] In view of this, the utility model aims to provide an intelligent dosing device to solve the problem that the existing PAC and carbon source dosing cannot be adjusted in real time according to the water inflow and water quality changes of on-site sewage, resulting in waste of medicine or unstable effluent water quality or even the risk of exceeding the standard.

[0005] In order to solve the above technical problems, the technical solutions provided by the utility model are as follows:

[0006] An intelligent dosing device, comprising:

[0007] Carbon source dosing module, PAC dosing module, monitoring equipment and control module;

[0008] The carbon source dosing module includes a carbon source storage tank, a first metering control module and a first multi-stage dosing pipeline;

[0009] The first multi-stage dosing pipeline includes a drug inlet and a plurality of drug outlets;

[0010] The outlet of the carbon source storage tank is connected to the drug inlet of the first multi-stage drug-feeding pipeline, and the drug outlet of the first multi-stage drug-feeding pipeline is connected to the factory area drug-feeding pipe;

[0011] The first metering control module is arranged on the first multi-stage dosing pipeline, and the first metering control module is connected to the control module;

[0012] The PAC dosing module includes a PAC stock solution tank, a PAC solution tank, a second metering control module, and a second multi-stage dosing pipeline;

[0013] The second multi-stage dosing pipeline includes a drug inlet and a plurality of drug outlets;

[0014] The PAC stock liquid tank is connected to the PAC solution tank by pipeline;

[0015] The outlet of the PAC solution tank is connected to the drug inlet of the second multi-stage drug-feeding pipeline, and the drug outlet of the second multi-stage drug-feeding pipeline is connected to the factory area drug-feeding pipe;

[0016] The second metering control module is arranged on the second multi-stage dosing pipeline;

[0017] The second metering control module is connected to the control module;

[0018] Control module and monitoring equipment connection.

[0019] Furthermore, the first multi-stage dosing pipeline and the second multi-stage dosing pipeline each include: a primary dosing pipe, a secondary dosing pipe and a tertiary dosing pipe;

[0020] One end of the primary dosing tube is the drug inlet, and the other end is connected to one end of several secondary dosing tubes;

[0021] The other ends of several secondary dosing tubes are connected to one end of the tertiary dosing tube;

[0022] The other end of the three-stage dosing pipe is the drug outlet;

[0023] The metering and control devices in the first metering control module and the second metering control module are correspondingly arranged on the secondary dosing pipes in the first multi-stage dosing pipeline and the second multi-stage dosing pipeline.

[0024] Furthermore, it also includes: a first pressure relief pipeline and a second pressure relief pipeline;

[0025] One end of the first pressure relief pipeline is connected to the carbon source storage tank, and the other end is connected to the secondary dosing pipe in the first multi-stage dosing pipeline;

[0026] One end of the second pressure relief pipeline is connected to the PAC solution tank, and the other end is connected to the secondary dosing pipe in the second multi-stage dosing pipeline.

[0027] Further, it also includes: a recycled water pipeline;

[0028] One end of the recycled water pipeline is connected to the PAC solution tank, and the other end is connected to the recycled water pump.

[0029] Furthermore, the monitoring equipment includes an outlet TP and TN monitoring module, an inlet water volume monitoring module, an inlet TP and TN monitoring module, an anoxic zone outlet water online nitrate nitrogen monitoring module and a carbon source COD equivalent monitoring module, and each module in the monitoring equipment is connected to the control module.

[0030] Furthermore, it also includes: a flap level gauge and a slurry stirrer;

[0031] The flap level gauge is set in the PAC solution tank;

[0032] The slurry stirrer is arranged in the PAC raw liquid tank and the PAC solution tank, and the flap level meter and the slurry stirrer are both connected to the control module.

[0033] Furthermore, it also includes: an ultrasonic level meter;

[0034] The ultrasonic liquid level meter is arranged in the carbon source storage tank and is connected with the control module.

[0035] Furthermore, the carbon source in the carbon source storage tank is a sodium acetate solution.

[0036] Furthermore, the number of the PAC solution tanks is two, and one of the PAC solution tanks is a spare.

[0037] Further, the dilution concentration of the stock solution in the PAC solution tank ranges from 1% to 5%.

[0038] In summary, the utility model provides an intelligent dosing device, including: a carbon source dosing module, a PAC dosing module, a monitoring device and a control module; the carbon source dosing module is provided with a carbon source storage tank, and the PAC dosing module is provided with a PAC stock solution tank and a PAC solution tank for diluting the stock solution, and the carbon source storage tank and the PAC solution tank are both connected to the factory dosing pipe through a multi-stage dosing pipeline. A metering control module is provided on the multi-stage dosing pipeline, and the control module obtains the dosage of each pipeline in the multi-stage dosing pipeline through the metering control module. At the same time, the control module also obtains some indicators of the inlet and outlet water quality and water volume through the monitoring equipment. According to some indicators of water quality and water volume, the current required carbon source and PAC dosage can be analyzed, and then the dosage of the carbon source storage tank and the PAC solution tank can be controlled through the metering control module, so as to adjust the dosage according to the inlet volume and water quality changes of the on-site sewage, and ensure that the outlet water quality meets the standard. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0040] Figure 1 A logic block diagram of an intelligent dosing device provided in an embodiment of the utility model;

[0041] Figure 2 A schematic diagram of the structure of a carbon source dosing module provided in an embodiment of the utility model;

[0042] Figure 3 A schematic structural diagram of a PAC dosing module provided in an embodiment of the utility model.

[0043] In the attached figure: 1. recycled water pipe, 2. dosing main pipe, 3. pressure relief pipe, 4. dosing pipe, 5. dosing branch pipe, 6. carbon source storage tank, 7. PAC metering pump, 8. PAC stock solution tank, 9. first PAC solution tank, 10. second PAC solution tank, 11. carbon source metering pump. DETAILED DESCRIPTION

[0044] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the embodiment described below is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0045] See also Figure 1 The present embodiment provides an intelligent dosing device, comprising: a carbon source dosing module, a PAC dosing module, a monitoring device and a control module; the carbon source dosing module comprises a carbon source storage tank, a first metering control module and a first multi-stage dosing pipeline; the first multi-stage dosing pipeline comprises a drug inlet and a plurality of drug outlets; the outlet of the carbon source storage tank is connected to the drug inlet of the first multi-stage dosing pipeline, and the drug outlet of the first multi-stage dosing pipeline is connected to the plant dosing pipe; the first metering control module is arranged on the first multi-stage dosing pipeline, and the first metering control module is connected to the control module The PAC dosing module includes a PAC stock liquid tank, a PAC solution tank, a second metering control module and a second multi-stage dosing pipeline; the second multi-stage dosing pipeline includes a drug inlet and a plurality of drug outlets; the PAC stock liquid tank is connected to the PAC solution tank pipeline; the outlet of the PAC solution tank is connected to the drug inlet of the second multi-stage dosing pipeline, and the drug outlet of the second multi-stage dosing pipeline is connected to the plant dosing pipe; the second metering control module is arranged on the second multi-stage dosing pipeline; the second metering control module is connected to the control module; the control module is connected to the monitoring equipment.

[0046] It should be noted that the carbon source dosing module and the PAC dosing module are used to achieve the addition of carbon source and PAC respectively. The carbon source storage tank provided in the carbon source dosing module is used to store the carbon source, the PAC stock solution tank provided in the PAC dosing module is used to store the PAC stock solution, and the PAC solution tank is used to dilute the PAC stock solution to an appropriate concentration. The carbon source dosing module and the PAC dosing module both use multi-stage dosing pipelines (i.e., the first multi-stage dosing pipeline and the second multi-stage dosing pipeline) to achieve the addition of the liquid medicine. The multi-stage dosing pipeline includes several levels of pipelines, wherein the first level of pipelines is the drug inlet pipeline, which is connected to the carbon source storage tank or the PAC solution tank, and the final level pipeline is directly connected to the plant dosing pipe. The pipeline design of the intermediate level can be designed to adapt to the specific environment and control requirements. The corresponding metering control module is arranged on the multi-stage dosing pipeline to achieve liquid medicine metering and flow control. The monitoring equipment is used to monitor the inflow volume and water quality changes of on-site sewage. After the information is fed back to the control module, the control module controls the addition of carbon source and PAC accordingly through the metering control module.

[0047] In the specific implementation of this embodiment, the carbon source dosing module, the PAC dosing module, the monitoring device and the control module are first connected accordingly, and the corresponding control logic is set in the control module, that is, the relationship between the water inflow and water quality changes of the on-site sewage and the corresponding liquid dosage. Then the control module obtains the water inflow and water quality changes of the on-site sewage in real time through the monitoring device, and at the same time obtains the real-time dosage of the carbon source and PAC in the carbon source dosing module and the PAC dosing module through the metering control module, and then calculates the liquid dosage according to the pre-set relationship, controls the metering control module according to the current real-time dosage, and realizes flow control of the multi-stage dosing pipeline through the metering control module, thereby realizing accurate dosing control of the carbon source and PAC, and ensuring that the effluent water quality meets the standard.

[0048] In some embodiments, the first multi-stage dosing pipeline and the second multi-stage dosing pipeline each include: a primary dosing pipe, a secondary dosing pipe, and a tertiary dosing pipe;

[0049] One end of the primary dosing tube is the drug inlet, and the other end is connected to one end of several secondary dosing tubes;

[0050] The other ends of several secondary dosing tubes are connected to one end of the tertiary dosing tube;

[0051] The other end of the three-stage dosing pipe is the drug outlet;

[0052] The metering and control devices in the first metering control module and the second metering control module are correspondingly arranged on the secondary dosing pipes in the first multi-stage dosing pipeline and the second multi-stage dosing pipeline.

[0053] In some embodiments, the carbon source dosing module and the PAC dosing module are also provided with a first pressure relief pipeline and a second pressure relief pipeline; one end of the first pressure relief pipeline is connected to the carbon source storage tank, and the other end is connected to the secondary dosing pipe in the first multi-stage dosing pipeline; one end of the second pressure relief pipeline is connected to the PAC solution tank, and the other end is connected to the secondary dosing pipe in the second multi-stage dosing pipeline.

[0054] In some embodiments, it further includes: a recycled water pipeline;

[0055] One end of the recycled water pipeline is connected to the PAC solution tank, and the other end is connected to the recycled water pump.

[0056] In some embodiments, the monitoring equipment includes an outlet TP and TN monitoring module, an inlet water volume monitoring module, an inlet TP and TN monitoring module, an anoxic zone outlet online nitric nitrogen monitoring module and a carbon source COD equivalent monitoring module, and each module in the monitoring equipment is connected to the control module.

[0057] In some embodiments, it also includes: a flap level gauge and a folding paddle agitator;

[0058] The flap level gauge is set in the PAC solution tank;

[0059] The slurry stirrer is arranged in the PAC raw liquid tank and the PAC solution tank, and the flap level meter and the slurry stirrer are both connected to the control module.

[0060] In some embodiments, it further includes: an ultrasonic level meter;

[0061] The ultrasonic liquid level meter is arranged in the carbon source storage tank and is connected with the control module.

[0062] In some embodiments, the carbon source in the carbon source storage tank is a sodium acetate solution.

[0063] In some embodiments, the number of PAC solution tanks is two, one of which is a spare.

[0064] In some embodiments, the dilution concentration of the stock solution in the PAC solution tank ranges from 1% to 5%.

[0065] Based on the above embodiments, Figure 2 and 3As shown, in a specific embodiment, the PAC dosing module is designed with 1 PAC stock solution pool (i.e., PAC stock solution tank 8), 2 PAC stock solution pool lifting pumps, 2 PAC solution pools (i.e., the first PAC solution tank 9 and the second PAC solution tank 10), 3 PAC metering pumps 7, 3 slurry stirrers, 3 flap level gauges, 3 electromagnetic flowmeters and 2 PAC dosing dilution recycling water pumps. In addition, an intelligent PAC dosing system is configured in the control module. The pipelines in the PAC dosing module include a recycling water pipe 1, a dosing main pipe 2, a pressure relief pipe 3, a dosing pipe 4 and a dosing branch pipe 5. The dosing main pipe 2, the dosing pipe 4 and the dosing branch pipe 5 correspond to the primary, secondary and tertiary dosing pipes in the multi-stage dosing pipeline. The dosing pipe 4 has multiple branches and the PAC metering pump 7 is arranged on each dosing pipe 4, and then converges into the required number of dosing pipelines or dosing branch pipelines. Each pipeline is connected to each device in the PAC dosing module according to actual needs.

[0066] The dosing device of the PAC dosing system is placed in the dosing room. The dosing system includes a PAC stock solution pool, which is mainly used to store the purchased PAC stock solution, and then pumped into the solution pool through the stock solution pump. There are two solution pools. The solution pool can supply medicine alone, or two solution pools can supply medicine at the same time. The actual amount of medicine is reasonably allocated and used. The concentration of the stock solution after dilution with water is 1%~5%, and then it is pumped into the required dosing point through the PAC metering pump 7. The PAC metering pump 7 realizes the function of the metering control module in the above-mentioned embodiment. The slurry stirrer stirs the liquid in the stock solution pool and the solution pool. The electromagnetic flowmeter is used for the control module to control the liquid output of the stock solution pool and the solution pool.

[0067] The PAC stock liquid tank and solution tank use flap level gauges to reflect the liquid level and remaining amount in the tank in real time. The intelligent PAC dosing system configured in the control module monitors automatic operation in real time and gives real-time alarms based on the liquid level situation. When the stock liquid tank reaches the set low liquid level, it automatically notifies the on-site operator to add agents in time, ensuring that the dosing system can operate normally at any time.

[0068] In order to save energy and reduce emissions, the PAC stock solution dilution water uses the effluent from the sewage treatment plant, which is pumped into the solution pool through the recycling water pump to dilute the PAC stock solution to the required ratio, and then pumped into the corresponding dosing point through the metering pump. The PAC pipeline is regularly cleaned with the recycled water from the recycling water pipe 1, so that the dosing pipe 4 is always unobstructed.

[0069] Specifically, in the above-mentioned PAC dosing module, the intelligent PAC dosing system can adopt post-feedback logic control. According to the online TP changes of the effluent monitored by the monitoring equipment and the set value, the PAC dosage is automatically controlled in real time. When the effluent TP is lower than the set value (such as 0.1 mg / L), the dosage is reduced, and when it is higher than the set value, the dosage is increased. The PAC dosage control range can be determined based on historical data and on-site beaker tests. For example, 0.87g of aluminum is required to remove 1g of orthophosphorus (phosphate is calculated in terms of phosphorus). The Al2O3 content in the commercial stock solution PAC is 10%, and the Al content is 5.3%. The theoretical stock solution PAC dosage is 16.4 mg / L.

[0070] The carbon source dosing module is designed with a carbon source raw liquid tank (i.e., carbon source storage tank 6), 3 carbon source metering pumps 11, 1 ultrasonic level meter, 2 electromagnetic flow meters, 2 online nitric nitrogen meters, and the control module is equipped with a set of intelligent carbon source dosing system. The pipelines in the carbon source dosing module can be designed with a dosing main pipe 2, a pressure relief pipe 3, and a dosing pipe 4. The dosing main pipe 2 and the dosing pipe 4 correspond to the primary and secondary dosing pipes in the multi-stage dosing pipeline. The dosing pipe 4 has multiple branches and the carbon source metering pump 11 is set on each dosing pipe 4, and then converges into the required number of dosing pipelines or dosing branch pipelines. Each pipeline is connected to each device in the carbon source dosing module according to actual needs.

[0071] The dosing device of the carbon source dosing module is placed in the dosing room. The carbon source dosing agent is sodium acetate solution. Therefore, a stock liquid barrel is required in the dosing room to store the purchased sodium acetate solution, and then add it to the dosing point through the carbon source metering pump 11. The electromagnetic flowmeter is used to control the liquid outflow of the stock liquid barrel by the control module, and the online nitric nitrogen meter is used to measure the nitric nitrogen content of the effluent water quality.

[0072] The carbon source raw liquid tank uses an ultrasonic level meter to display the liquid level in the tank in real time, and the remaining liquid volume is determined by the liquid level. Then, the intelligent carbon source dosing system will give a pre-alarm based on the set remaining amount of medicine, so as to notify the on-site operators and technical managers that they need to add medicine. The amount of carbon source added is automatically added by the intelligent carbon source dosing system based on the influent water volume, water quality, mixed liquid reflux volume and effluent water quality monitored by the monitoring equipment.

[0073] Specifically, in the above-mentioned carbon source dosing module, the intelligent carbon source dosing system can adopt the post-feedback + feedforward control logic.

[0074] Post-feedback is to control the carbon source dosage in real time based on the online nitric nitrogen instrument data at the anoxic outlet and the real-time water volume, so that the nitric nitrogen at the anoxic outlet reaches the set value (2 mg / L). According to the change trend of nitric nitrogen, the dosage is adjusted in real time, such as increasing or decreasing 1-2 mg / L, with a time interval of 2 hours (the residence time of the anoxic pool can be given according to the change of water volume, the first phase anoxic section is 1000 m3, and the second phase anoxic section is 1800 m3).

[0075] Feedforward is to calculate the amount of carbon source to be added based on the COD, TN and daily water volume tested by the laboratory every day. The amount of carbon source added is determined based on the feedback results and the TN of the factory water quality. If necessary, it can be changed every day or every few days.

[0076] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An intelligent dosing device, characterized in that: include: Carbon source dosing module, PAC dosing module, monitoring equipment and control module; The carbon source dosing module includes a carbon source storage tank, a first metering control module and a first multi-stage dosing pipeline; The first multi-stage dosing pipeline includes a drug inlet and a plurality of drug outlets; The outlet of the carbon source storage tank is connected to the drug inlet of the first multi-stage drug-feeding pipeline, and the drug outlet of the first multi-stage drug-feeding pipeline is connected to the factory area drug-feeding pipe; The first metering control module is arranged on the first multi-stage dosing pipeline, and the first metering control module is connected to the control module; The PAC dosing module includes a PAC stock solution tank, a PAC solution tank, a second metering control module and a second multi-stage dosing pipeline; The second multi-stage dosing pipeline includes a drug inlet and a plurality of drug outlets; The PAC stock solution tank is connected to the PAC solution tank pipeline; The outlet of the PAC solution tank is connected to the drug inlet of the second multi-stage drug-feeding pipeline, and the drug outlet of the second multi-stage drug-feeding pipeline is connected to the factory area drug-feeding pipe; The second metering control module is arranged on the second multi-stage dosing pipeline; The second metering control module is connected to the control module; The control module is connected to the monitoring device.

2. The intelligent dosing device according to claim 1, characterized in that: The first multi-stage dosing pipeline and the second multi-stage dosing pipeline both include: a primary dosing pipe, a secondary dosing pipe and a tertiary dosing pipe; One end of the first-level dosing tube is the drug inlet, and the other end is connected to one end of a plurality of the second-level dosing tubes; The other ends of a plurality of the secondary dosing tubes are connected to one end of the tertiary dosing tube; The other end of the three-stage dosing pipe is the drug outlet; The metering and control devices in the first metering control module and the second metering control module are correspondingly arranged on the secondary dosing pipes in the first multi-stage dosing pipeline and the second multi-stage dosing pipeline.

3. The intelligent dosing device according to claim 2, characterized in that: Also includes: a first pressure relief pipeline and a second pressure relief pipeline; One end of the first pressure relief pipeline is connected to the carbon source storage tank, and the other end is connected to the secondary dosing pipe in the first multi-stage dosing pipeline; One end of the second pressure relief pipeline is connected to the PAC solution tank, and the other end is connected to the secondary dosing pipe in the second multi-stage dosing pipeline.

4. The intelligent dosing device according to claim 2, characterized in that: Also includes: Return water pipeline; One end of the recycling water pipeline is connected to the PAC solution tank, and the other end is connected to the recycling water pump.

5. The intelligent dosing device according to claim 1, characterized in that: The monitoring equipment includes an outlet TP and TN monitoring module, an inlet water volume monitoring module, an inlet TP and TN monitoring module, an anoxic zone outlet water online nitric nitrogen monitoring module and a carbon source COD equivalent monitoring module, and each module in the monitoring equipment is connected to the control module.

6. The intelligent dosing device according to claim 1, characterized in that: Also includes: Flap level gauge and slurry agitator; The flap level gauge is arranged in the PAC solution tank; The slurry stirrer is arranged in the PAC raw liquid tank and the PAC solution tank, and the flap level meter and the slurry stirrer are both connected to the control module.

7. The intelligent dosing device according to claim 1, characterized in that: Also includes: Ultrasonic level meter; The ultrasonic liquid level meter is arranged in the carbon source storage tank and connected to the control module.

8. The intelligent dosing device according to claim 1, characterized in that: The carbon source in the carbon source storage tank is sodium acetate solution.

9. The intelligent dosing device according to claim 1, characterized in that: The number of the PAC solution tanks is two, one of which is a spare.

10. The intelligent dosing device according to claim 1, characterized in that: The dilution concentration range of the stock solution in the PAC solution tank is 1% to 5%.

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