Intelligent sludge dewatering system

Abstract

The utility model relates to an intelligent sludge dewatering system, which is characterized in that transverse correlation data between a sludge concentration meter and the frequency of a sludge inlet pump, the frequency of a screw batch feeder, a flow regulating valve, the frequency of a dosing pump, the frequency of a charging machine and the frequency of a screw shaft motor are input into a controller in advance, and in the actual operation process, the controller can also control the frequency of the screw shaft motor through a first flow switch. Through data feedback of the first flow switch, the second flow switch and the third flow switch, accurate control over the dosage proportion is achieved, so that efficient operation of sludge treatment is met; the controller further finely adjusts the frequency of the sludge inlet pump, the frequency of the screw feeder, the frequency of the flow regulating valve, the frequency of the dosing pump, the frequency of the feeder and the frequency of the screw shaft motor according to data display of the moisture meter so as to adapt to the fluctuating sludge concentration in the sludge buffer pool, the automation degree of the whole system is greatly increased, and the purposes of saving energy and reducing consumption can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of sludge dewatering equipment in sewage treatment plants, in particular to an intelligent sludge dewatering system. Background Art

[0002] The sludge dewatering system is a key facility in the post-treatment process of the sewage treatment plant. The whole system is mainly composed of an automatic drug-soaking machine and a spiral stacking sludge dewatering machine. The automatic drug-soaking machine includes a dry powder feeding component, a water distribution component and a liquid medicine mixing box. Among them, the dry powder feeding component mainly relies on a spiral feeding machine to quantitatively feed flocculants into the liquid medicine mixing box, and the water distribution component is connected to the liquid medicine mixing box through a pipeline, and a manual regulating valve, an electric stop valve and a flow meter are arranged on the water supply pipeline in sequence; the spiral stacking sludge dewatering machine includes a flocculation mixing tank and a spiral stacking body. Among them, the flocculation mixing tank is used to connect the sludge buffer tank and the liquid medicine mixing box and is equipped with an electric stirrer to fully mix the sludge and the liquid medicine, and the spiral stacking body is composed of mutually stacked fixed rings and floating rings and a spiral shaft running through it. The higher the frequency of the spiral shaft, the greater the sludge processing capacity, but at the same time, the water content of the mud cake produced is also greater.

[0003] In order to ensure the efficiency of sludge treatment, that is, to ensure high speed and low water content of sludge treatment, general sewage treatment plants will conduct a large number of experiments and set multiple average values ​​according to the sludge concentration in the sludge buffer tank. On the premise of knowing this average value, the ratio of flocculant and water in the automatic medicine soaking machine is manually adjusted, and the frequency of the sludge feed pump and the dosing pump is adjusted. At the same time, the working frequency of the spiral sludge dewatering machine is adjusted accordingly. However, the sludge concentration in the sludge buffer tank usually changes, and in the process of continuous change, it is necessary to continuously adjust the various components to meet the optimal working conditions, which greatly increases the manpower and material costs. Utility Model Content

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the problem that the sludge dewatering system of the sewage treatment plant in the prior art cannot automatically complete the sludge addition and drug dispensing according to the sludge concentration and then efficiently dewater.

[0005] In order to solve the above technical problems, the utility model provides an intelligent sludge dewatering system for dewatering the sludge in the sludge buffer tank, comprising:

[0006] A sludge concentration meter, wherein the sludge concentration meter is arranged in the sludge buffer tank;

[0007] A mud inlet pipe, the mud inlet pipe is connected to the sludge buffer tank, and the mud inlet pipe is provided with a mud inlet pump and a first flow switch;

[0008] A medicine adding box, the medicine adding box includes a medicine liquid mixing box, a water distribution component and a dry powder delivery component, the water distribution component includes a water tank and a water supply pipe, the two ends of the water supply pipe are respectively connected to the water tank and the medicine liquid mixing box, the water supply pipe is provided with a flow regulating valve and a second flow switch, the dry powder delivery component includes a dry powder box and a screw feeder, the screw feeder is used to quantitatively deliver the flocculant in the dry powder box into the medicine liquid mixing box;

[0009] A dosing pipe, the dosing pipe is connected to the liquid medicine mixing box, and a dosing pump and a third flow switch are arranged on the dosing pipe;

[0010] A mud-medicine mixing tank, the mud-medicine mixing tank is connected to the mud inlet pipe and the medicine adding pipe;

[0011] A spiral stacking body, the spiral stacking body is connected to the mud-medicine mixing tank, a feeding pump is further provided between the spiral stacking body and the mud-medicine mixing tank, a moisture meter is provided at the outlet of the spiral stacking body, and the spiral stacking body includes a screw shaft motor;

[0012] A controller is connected to the sludge concentration meter, the sludge feed pump, the first flow switch, the flow regulating valve, the second flow switch, the screw feeder, the dosing pump, the third flow switch, the feed pump, the moisture meter and the screw shaft motor. The controller simultaneously adjusts the frequency of the sludge feed pump, the frequency of the screw feeder, the opening of the flow regulating valve, the frequency of the dosing pump, the frequency of the feed pump and the frequency of the screw shaft motor according to the data signal fed back by the sludge concentration meter. The controller also fine-tunes the frequency of the sludge feed pump, the frequency of the screw feeder, the opening of the flow regulating valve, the frequency of the dosing pump, the frequency of the feed pump and the frequency of the screw shaft motor according to the data signal of the moisture meter.

[0013] In one embodiment of the utility model, a first liquid level meter is provided in the mud-medicine mixing tank, and the first liquid level meter is connected to the controller. The controller automatically adjusts the frequencies of the mud feed pump and the dosing pump according to the signal provided by the first liquid level meter.

[0014] In one embodiment of the utility model, a first stirring motor is arranged in the mud-medicine mixing tank, and a second stirring motor is arranged in the liquid medicine mixing box, and both the first stirring motor and the second stirring motor are connected to the controller.

[0015] In one embodiment of the utility model, a second liquid level meter is provided in the liquid medicine mixing box, and the second liquid level meter is also connected to the controller. The controller automatically adjusts the opening of the flow regulating valve and the frequency of the screw feeder according to the signal provided by the second liquid level meter.

[0016] The above technical solution of the utility model has the following advantages compared with the prior art:

[0017] The intelligent sludge dewatering system described in the utility model has the lateral correlation data between the sludge concentration meter and the frequency of the mud feed pump, the frequency of the spiral feeder, the flow regulating valve, the dosing pump frequency, the feeder frequency and the screw shaft motor frequency entered in advance in the controller. During the actual operation, the controller can also realize the precise control of the dosage ratio through the data feedback of the first flow switch, the second flow switch and the third flow switch to meet the efficient operation of the sludge treatment. At the same time, the controller also fine-tunes the frequency of the mud feed pump, the frequency of the spiral feeder, the flow regulating valve, the dosing pump frequency, the feeder frequency and the screw shaft motor frequency according to the data display of the moisture meter to adapt to the fluctuating sludge concentration in the sludge buffer tank. The whole system greatly increases the degree of automation and can achieve the purpose of energy saving and consumption reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to the specific embodiments of the utility model in combination with the accompanying drawings, wherein

[0019] Figure 1 It is a schematic diagram of the overall structure of the intelligent sludge dewatering system of the utility model.

[0020] Explanation of the reference numerals in the specification: 1. Sludge buffer tank; 2. Sludge concentration meter; 3. Sludge inlet pipe; 4. Sludge inlet pump; 5. First flow switch; 6. Water tank; 7. Water supply pipe; 8. Flow regulating valve; 9. Second flow switch; 10. Dry powder box; 11. Screw feeder; 12. Drug liquid mixing box; 13. Dosing pipe; 14. Dosing pump; 15. Third flow switch; 16. Sludge drug mixing tank; 17. Screw stack body; 18. Dosing pump; 19. Moisture meter; 20. Screw shaft motor; 21. Controller; 22. First liquid level meter; 23. First stirring motor; 24. Second stirring motor; 25. Second liquid level meter; 26. Screw conveyor; 27. Sludge silo. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0022] Example 1: The following is the sludge production and related data of the screw stacking machine at different frequencies obtained by controlling different variables according to the actual situation in a sewage treatment plant.

[0023]

[0024] It can be seen from the above experimental figures that (1) when the sludge concentration in the sludge buffer tank is kept constant and the sludge input and the dosage are kept constant, the sludge treatment volume gradually increases with the increase of the screw shaft frequency and the sludge water content also gradually increases; (2) when the sludge concentration in the sludge buffer tank is kept constant, the sludge input volume is reduced, the dosage remains basically unchanged, and the screw shaft frequency is kept constant, the sludge output decreases and the sludge water content increases. At the same time, under this condition, the sludge treatment volume still gradually increases with the increase of the screw shaft frequency and the sludge water content also gradually increases. If the screw shaft frequency is continued to be increased, the sludge treatment volume does not increase significantly but the water content continues to increase. It can be concluded that under a certain sludge concentration in the sludge buffer tank, the moisture content of the produced sludge cake and the sludge treatment speed must be determined first, and the optimal ratio of sludge and chemical addition and the optimal frequency of the corresponding screw stack sludge dewatering machine can be clarified, thereby achieving the purpose of energy saving and consumption reduction. Through multiple experiments, the sludge concentration in the sludge buffer tank, the required moisture content of the sludge cake, the optimal sludge treatment efficiency and the proportion of flocculant addition, the frequency of the sludge feed pump, the frequency of the chemical dosing pump, and the frequency of the screw stack sludge dewatering machine can be matched to form a complete set of data entry control system, and guide the controller to accurately adjust each electronic component according to the sludge concentration to meet the requirements.

[0025] Example 2, reference Figure 1 As shown, an intelligent sludge dewatering system is used to dewater the sludge in the sludge buffer tank 1, comprising:

[0026] A sludge concentration meter 2, which is arranged in the sludge buffer tank 1;

[0027] A mud inlet pipe 3, the mud inlet pipe 3 is connected to the sludge buffer tank 1, and a mud inlet pump 4 and a first flow switch 5 are arranged on the mud inlet pipe 3;

[0028] A medicine adding box, the medicine adding box includes a medicine liquid mixing box 12, a water distribution component and a dry powder delivery component, the water distribution component includes a water tank 6 and a water supply pipe 7, the two ends of the water supply pipe 7 are respectively connected to the water tank 6 and the medicine liquid mixing box 12, the water supply pipe 7 is provided with a flow regulating valve 8 and a second flow switch 9, the dry powder delivery component includes a dry powder box 10 and a screw feeder 11, the screw feeder 11 is used to quantitatively deliver the flocculant in the dry powder box 10 into the medicine liquid mixing box 12;

[0029] A dosing pipe 13, the dosing pipe 13 is connected to the liquid medicine mixing box 12, and a dosing pump 14 and a third flow switch 15 are arranged on the dosing pipe 13;

[0030] A mud-medicine mixing tank 16, which is connected to the mud inlet pipe 3 and the medicine adding pipe 13;

[0031] The screw stack body 17 is connected to the mud-medicine mixing tank 16. A feed pump 18 is provided between the screw stack body 17 and the mud-medicine mixing tank 16. A moisture meter 19 is provided at the outlet of the screw stack body 17. The screw stack body 17 includes a screw shaft motor 20.

[0032] The controller 21 is connected to the sludge concentration meter 2, the mud feed pump 4, the first flow switch 5, the flow regulating valve 8, the second flow switch 9, the screw feeder 11, the dosing pump 14, the third flow switch 15, the feed pump, the moisture meter 19 and the screw shaft motor 20. The controller 21 simultaneously adjusts the frequency of the mud feed pump 4, the frequency of the screw feeder 11, the opening of the flow regulating valve 8, the frequency of the dosing pump 14, the frequency of the feed pump 18 and the frequency of the screw shaft motor 20 according to the data signal fed back by the sludge concentration meter 2. The controller 21 also fine-tunes the frequency of the mud feed pump 4, the frequency of the screw feeder 11, the opening of the flow regulating valve 8, the frequency of the dosing pump 14, the frequency of the feed pump 18 and the frequency of the screw shaft motor 20 according to the data signal of the moisture meter 19.

[0033] In this intelligent sludge dewatering system, the controller 21 records in advance the horizontal correlation data between the sludge concentration meter 2 and the frequency of the mud feed pump 4, the frequency of the spiral feeder 11, the flow regulating valve 8, the frequency of the dosing pump 14, the frequency of the feeder and the frequency of the screw shaft motor 20. During the actual operation, the controller 21 can also realize the precise control of the dosage ratio through the data feedback of the first flow switch 5, the second flow switch 9 and the third flow switch 15 to meet the efficient operation of the sludge treatment. At the same time, the controller 21 also fine-tunes the frequency of the mud feed pump 4, the frequency of the spiral feeder 11, the flow regulating valve 8, the frequency of the dosing pump 14, the frequency of the feeder and the frequency of the screw shaft motor 20 according to the data display of the moisture meter 19 to adapt to the fluctuating sludge concentration in the sludge buffer tank 1. The whole system greatly increases the degree of automation and can achieve the purpose of energy saving and consumption reduction.

[0034] Specifically, the moisture meter 19 is used to measure the moisture content of the mud cake at the outlet of the spiral stacking body 17. The produced mud cake is transported to the sludge silo 27 through the screw conveyor 26 and then transported out. All pump components and valve components are electronic control devices. The controller 21 is a PLC controller 21, which not only accurately records multiple groups of sludge inlet pump 4 frequencies, screw feeder 11 frequencies, flow regulating valve 8, dosing pump 14 frequencies, feeder frequencies and screw shaft motor 20 frequencies that are horizontally matched according to sludge concentration, but also has a data calibration function, which can fine-tune the sludge inlet pump 4 frequencies, screw feeder 11 frequencies, flow regulating valve 8, dosing pump 14 frequencies, feeder frequencies and screw shaft motor 20 frequencies according to the controller 21 and the data display of the moisture meter 19 to adapt to the fluctuating sludge concentration in the sludge buffer tank 1. Moreover, as the concentration of the drug liquid increases, the compactness of the drug-mud mixture becomes higher. However, when the concentration of the drug liquid is high, the mud-drug mixture is drug-wrapped mud. When the drug-mud ratio is visually observed to be 1:10, the drug-mud combination ratio is basically the same. When the drug-mud ratio exceeds 1:10, there are more flocs in the drug liquid mixing box 12, which has a greater impact on the energy consumption of the pipeline. Therefore, it is more appropriate to comprehensively consider reducing the drug liquid concentration in the mud-drug mixing tank 16 and increase the flow rate of the dosing pump 14 to change the drug liquid-mud ratio in the mud-drug mixing tank 16.

[0035] Furthermore, a first liquid level meter 22 is provided in the mud-drug mixing tank 16 . The first liquid level meter 22 is connected to the controller 21 . The controller 21 automatically adjusts the frequencies of the mud feeding pump 4 and the dosing pump 14 according to the signal provided by the first liquid level meter 22 .

[0036] Specifically, when the spiral stacking machine is unable to process the sludge in time, the liquid level in the mixing tank will slowly rise. When the high liquid level is reached, the automatic system will automatically shut down the mud feed pump 4 and the dosing pump 14, and will not restart the mud feed pump 4 and the dosing pump 14 until the liquid level drops to the low liquid level.

[0037] Furthermore, a first stirring motor 23 is provided in the mud-medicine mixing tank, and a second stirring motor 24 is provided in the medicine-liquid mixing box 12 . Both the first stirring motor 23 and the second stirring motor 24 are connected to the controller 21 .

[0038] Specifically, the first stirring motor 23 in the mud-medicine mixing tank is mainly used to mix and stir the sludge flowing in from the mud inlet pump 4 and the flocculant input through the dosing pump 14. The stirring motor can change the stirring speed through the control of the controller 21. If the speed is too slow, the sludge and flocculant cannot be fully mixed to form alum flowers. If the speed is too fast, the already formed alum flowers are easily broken. Therefore, the frequency of the stirring motor corresponding to different working conditions is set in advance in the controller 21, and the second stirring motor 24 is used to fully mix the liquid medicine.

[0039] Furthermore, a second liquid level meter 25 is provided in the liquid mixing box, and the second liquid level meter 25 is also connected to the controller 21 . The controller 21 automatically adjusts the opening of the flow regulating valve 8 and the frequency of the screw feeder 11 according to the signal provided by the second liquid level meter 25 .

[0040] Specifically, when the liquid level in the liquid mixing box 12 is at a high level, the opening of the flow regulating valve 8 is reduced, and the frequency of the screw feeder 11 is reduced to meet the fixed liquid-drug ratio, and vice versa.

[0041] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.

Claims

1. An intelligent sludge dewatering system, used for dewatering sludge in a sludge buffer tank, characterized in that: include: A sludge concentration meter, wherein the sludge concentration meter is arranged in the sludge buffer tank; A mud inlet pipe, the mud inlet pipe is connected to the sludge buffer tank, and the mud inlet pipe is provided with a mud inlet pump and a first flow switch; A medicine adding box, the medicine adding box includes a medicine liquid mixing box, a water distribution component and a dry powder delivery component, the water distribution component includes a water tank and a water supply pipe, the two ends of the water supply pipe are respectively connected to the water tank and the medicine liquid mixing box, the water supply pipe is provided with a flow regulating valve and a second flow switch, the dry powder delivery component includes a dry powder box and a screw feeder, the screw feeder is used to quantitatively deliver the flocculant in the dry powder box into the medicine liquid mixing box; A dosing pipe, the dosing pipe is connected to the liquid medicine mixing box, and a dosing pump and a third flow switch are arranged on the dosing pipe; A mud-medicine mixing tank, the mud-medicine mixing tank is connected to the mud inlet pipe and the medicine adding pipe; A spiral stacking body, the spiral stacking body is connected to the mud-medicine mixing tank, a feeding pump is further provided between the spiral stacking body and the mud-medicine mixing tank, a moisture meter is provided at the outlet of the spiral stacking body, and the spiral stacking body includes a screw shaft motor; A controller is connected to the sludge concentration meter, the sludge feed pump, the first flow switch, the flow regulating valve, the second flow switch, the screw feeder, the dosing pump, the third flow switch, the feed pump, the moisture meter and the screw shaft motor. The controller simultaneously adjusts the frequency of the sludge feed pump, the frequency of the screw feeder, the opening of the flow regulating valve, the frequency of the dosing pump, the frequency of the feed pump and the frequency of the screw shaft motor according to the data signal fed back by the sludge concentration meter. The controller also fine-tunes the frequency of the sludge feed pump, the frequency of the screw feeder, the opening of the flow regulating valve, the frequency of the dosing pump, the frequency of the feed pump and the frequency of the screw shaft motor according to the data signal of the moisture meter.

2. The intelligent sludge dewatering system according to claim 1 is characterized in that: A first liquid level meter is arranged in the mud-medicine mixing tank, and the first liquid level meter is connected to the controller. The controller automatically adjusts the frequencies of the mud feed pump and the dosing pump according to the signal provided by the first liquid level meter.

3. The intelligent sludge dewatering system according to claim 1 is characterized in that: A first stirring motor is arranged in the mud-medicine mixing tank, and a second stirring motor is arranged in the liquid medicine mixing box. Both the first stirring motor and the second stirring motor are connected to the controller.

4. The intelligent sludge dewatering system according to claim 1 is characterized in that: A second liquid level meter is arranged in the liquid medicine mixing box, and the second liquid level meter is also connected to the controller. The controller automatically adjusts the opening of the flow regulating valve and the frequency of the screw feeder according to the signal provided by the second liquid level meter.

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