Sewage treatment device for denitrification

Abstract

The utility model belongs to the technical field of sewage treatment, and particularly relates to a sewage treatment device for denitrification, which comprises an aerobic tank, an anaerobic tank and a storage barrel, a water quality detection component is arranged below the right side of the aerobic tank, a detection probe is arranged on the inner side of the upper part of the aerobic tank, the detection probe is a multi-parameter integrated probe, and the storage barrel is connected with the anaerobic tank. The storage barrel comprises a temperature sensor and a pH sensor, a stirring device is arranged above the anaerobic jar, the interior of the storage barrel is divided into a sludge storage area and a medicament adding area, and the medicament adding area is connected with a carbon source adding pump. By arranging the water quality detection assembly, the sewage treatment condition is detected in real time, key water quality parameters are obtained in real time, data support is provided for process optimization, and the working efficiency of the sewage treatment device is improved.

Description

A wastewater treatment device for denitrification Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a wastewater treatment device for denitrification. Background Technology

[0002] Currently, wastewater denitrification treatment mostly adopts biological methods (such as A / O and A² / O processes), which remove ammonia nitrogen and nitrate nitrogen through nitrification-denitrification reactions. Announcement No. CN 222665590 U discloses a high-efficiency biological wastewater treatment device for nitrogen and phosphorus removal, which can treat wastewater. However, this wastewater treatment device has inadequate detection during operation and cannot obtain key water quality parameters in real time, affecting the working efficiency of the treatment device. Summary of the Invention

[0003] In view of the shortcomings of the prior art, this utility model provides a wastewater treatment device for denitrification to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a wastewater treatment device for denitrification, comprising an aerobic tank, an anaerobic tank, and a storage tank. A water quality detection component is installed on the lower right side of the aerobic tank, and a detection probe is installed on the upper inner side of the aerobic tank. The detection probe is a multi-parameter integrated probe, including a temperature sensor and a pH sensor. A stirring device is installed above the anaerobic tank. The storage tank is internally divided into a sludge storage area and a reagent dosing area, and the reagent dosing area is connected to a carbon source dosing pump.

[0005] The water quality testing components include a DO sensor, an ORP sensor, and an online ammonia nitrogen / nitrate analyzer.

[0006] As a preferred technical solution of this utility model, an anaerobic tank is provided on one side of the aerobic tank. The outer surface of the anaerobic tank is the tank body, and the bottom of the tank body is provided with an air-lift sludge return pipe with an air-to-water ratio of 1:2-1:4.

[0007] As a preferred technical solution of this utility model, the aerobic tank and the storage tank are provided with protective support railings, and a ladder is provided below the front end of the support railings.

[0008] As a preferred embodiment of this utility model, the detection probe is externally provided with a telescopic rod, a connecting device, and a holding rod.

[0009] As a preferred embodiment of this utility model, a sedimentation tank is provided on the lower left side of the supporting guardrail.

[0010] As a preferred embodiment of this utility model, a control valve is provided in front of the storage tank.

[0011] As a preferred technical solution of this utility model, the device is equipped with a PLC controller that dynamically adjusts the stirring speed, aeration volume and reflux ratio according to monitoring data. The DO sensor, ORP sensor and ammonia nitrogen / nitrate online analyzer are connected to the PLC controller via data cables.

[0012] Compared with the prior art, this utility model provides a wastewater treatment device for denitrification, which has the following beneficial effects:

[0013] This invention, by setting up a water quality detection component, monitors the wastewater treatment status in real time, obtains key water quality parameters in real time, provides data support for process optimization, and improves the working efficiency of the wastewater treatment device. Attached Figure Description

[0014] Figure 1 is a schematic diagram of the structure of this utility model;

[0015] Figure 2 is a schematic diagram of the storage bucket structure of this utility model;

[0016] Figure 3 is a schematic diagram of the detection probe structure of this utility model;

[0017] Figure 4 is a schematic diagram of the water quality testing component.

[0018] In the diagram: 1. Storage tank; 2. Detection probe; 3. Support railing; 4. Sedimentation tank; 5. Ladder; 6. Water quality testing components; 6-1. DO sensor; 6-2. ORP sensor; 6-3. Ammonia nitrogen / nitrate online analyzer; 7. Tank; 8. Control valve; 9. Telescopic rod; 10. Connecting device; 11. Container rod; 12. Aerobic tank; 13. Stirring device; 14. Anaerobic tank. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model. Embodiments

[0020] Please refer to Figures 1-3. The present invention provides the following technical solution: a wastewater treatment device for denitrification, including an aerobic tank 12, an anaerobic tank 14 and a storage tank 1. A water quality detection component 6 is provided on the lower right side of the aerobic tank 12. A detection probe 2 is provided on the upper inner side of the aerobic tank 12. The detection probe 2 is a multi-parameter integrated probe, including a temperature sensor and a pH sensor. A stirring device 13 is provided above the anaerobic tank 14.

[0021] The water quality testing component 6 includes a DO sensor 6-1, an ORP sensor 6-2, and an online ammonia nitrogen / nitrate analyzer 6-3.

[0022] DO sensor (dissolved oxygen sensor)

[0023] 1. Core function: Storage tank 1 Environmental status monitoring: In the aerobic tank, real-time monitoring of dissolved oxygen concentration (DO=2-4mg / L) ensures efficient nitrification reaction (ammonia nitrogen → nitrate); in the anoxic tank, control DO<0.5 mg / L to maintain the activity of denitrifying bacteria (transforming nitrate into nitrogen).

[0024] The aeration control based on probe 2 is as follows: when DO is lower than the set threshold (e.g., DO < 2 mg / L in aerobic tank), the PLC automatically increases the aeration rate or starts the standby blower; when DO is too high (e.g., DO > 4 mg / L in aerobic tank), the aeration intensity is reduced to decrease energy consumption.

[0025] 2. Technical significance: It avoids the problems of excessive aeration (wasting energy) or insufficient aeration (low nitrification efficiency) in traditional processes, and realizes on-demand oxygen supply.

[0026] ORP sensor (oxidation-reduction potential sensor)

[0027] 1. Core function: Judging the reaction process of storage tank 1: In the anoxic tank, the ORP value is usually -50~-200 mV, which reflects whether the denitrification reaction is sufficient (the lower the ORP, the more thorough the denitrification); in the aerobic tank, the ORP value > +50 mV indicates that the nitrification reaction is proceeding normally;

[0028] Detection probe 2 dynamic control signal source: When the ORP value rises abnormally (such as ORP>0 mV in anoxic pool), it indicates that the carbon source is insufficient or the reflux ratio of the mixed liquor is too low, triggering the addition of carbon source or increasing the reflux ratio.

[0029] 2. Technical significance: By predicting water quality fluctuations through the trend of ORP value changes, process parameters can be adjusted in advance to avoid a decrease in denitrification efficiency.

[0030] Online ammonia nitrogen analyzer

[0031] 1. Core function: Storage tank 1 nitrification effect monitoring: Real-time detection of ammonia nitrogen concentration in effluent (target ≤5 mg / L) to determine whether the nitrification reaction is complete.

[0032] If ammonia nitrogen exceeds the standard (e.g., >10 mg / L), it indicates insufficient nitrifying bacteria activity or too short HRT, requiring an extension of the aerobic tank residence time or supplementation of alkalinity.

[0033] Detection probe 2 process linkage control: Combine DO data to optimize aeration strategy (e.g., when ammonia nitrogen increases, simultaneously increase DO to 3.5 mg / L to enhance nitrification).

[0034] 2. Technical significance: To ensure that the ammonia nitrogen in the effluent consistently meets the standards, avoiding the risk of exceeding the standards due to the lag in manual testing in traditional processes.

[0035] The collaborative control logic of the three components is as follows:

[0036]

[0037] Advantages of three-component collaborative control:

[0038] Precise control: Through the linkage of three parameters, key processes such as aeration, recirculation, and carbon source addition are dynamically optimized; Energy saving and consumption reduction: Compared with traditional fixed parameter operation, aeration energy consumption can be reduced by 20%~30%; Stable compliance: The compliance rate of total nitrogen (TN) and ammonia nitrogen (NH3-N) in the effluent is increased to over 95%; Shock load resistance: When water quality fluctuates (such as a sudden increase in influent ammonia nitrogen), the system automatically adjusts to emergency mode to avoid collapse.

[0039] Through the synergistic effect of these three types of sensors, the intelligent control module has upgraded wastewater treatment from "experience-driven" to "data-driven," which aligns with the development trend of smart water management.

[0040] Specifically, an anaerobic tank 14 is provided on one side of the aerobic tank 12. The outer surface of the anaerobic tank 14 is a tank body 7, and the bottom of the tank body 7 is provided with an airlift sludge return pipe.

[0041] Specifically, the aerobic tank 12 and the storage tank 1 are equipped with protective support railings 3, and a ladder 5 is installed at the lower front end of the support railings 3.

[0042] Specifically, the external components of the detection probe 2 include a telescopic rod 9, a connecting device 10, and a holding rod 11. The telescopic rod 9 is hydraulically driven with a telescopic stroke of 0.5-2m, and the end connecting device 10 is a quick-release interface. The holding rod 11 is equipped with a waterproof junction box 11a, which contains a built-in signal amplifier.

[0043] Specifically, a sedimentation tank 4 is provided on the lower left side of the supporting guardrail 3.

[0044] Specifically, a control valve 8 is installed in front of the storage tank 1. The control valve 8 is an electric regulating valve with a valve body diameter of DN50-DN200. It supports 4-20mA signal control. The control valve 8 is linked with the PLC controller and adjusts the reflux ratio of 50%-200% according to the ammonia nitrogen data.

[0045] Specifically, the device is equipped with a PLC controller that dynamically adjusts the stirring speed, aeration rate, and reflux ratio based on monitoring data. The DO sensor 6-1, ORP sensor 6-2, and ammonia nitrogen / nitrate online analyzer 6-3 are connected to the PLC controller via data cables.

[0046] In this embodiment, the anaerobic tank 14 is equipped with a baffle assembly to form an S-shaped water flow channel, extending the hydraulic residence time. The baffle has an opening ratio of 10%-15%, an aperture of 50-80mm, and is arranged in a quincunx pattern. The turbine agitator 13 has blades with a diameter of 1 / 3-1 / 2 of the tank diameter and a power of 1.5-3kW. The inclined plate packing is made of PVC with a plate spacing of 80-100mm. The aerobic tank 12 uses multi-segment tapered aeration pipes, with the aeration density at the front end being higher than that at the rear end. It is equipped with a guide tube and is arranged at a 30° angle with the aeration pipes. The rotation speed of the agitator 13 is adjustable from 50-100r / min.

[0047] The bottom of sedimentation tank 4 is connected to the anoxic tank via an air lift return pipe, and it is equipped with a dual-channel return pipeline including sludge return and mixed liquor return branches.

[0048] Working principle and usage process of this utility model:

[0049] Inoculate activated sludge (MLSS≥3500 mg / L) into anaerobic tank 14. Set PLC control parameters. Wastewater flows sequentially through anaerobic tank 14 (denitrification), aerobic tank 12 (nitrification), and sedimentation tank 4 (solid-liquid separation). Aeration, stirring, and reflux are automatically adjusted based on real-time monitoring data. When DO<2 mg / L, increase the aeration rate to 120% of the rated value. When ORP>-50 mV, trigger the carbon source dosing pump with a dosing rate of 10-20 mg / L. When ammonia nitrogen>8 mg / L, activate the emergency aeration mode and trigger an alarm. After treatment, store the wastewater in storage tank 1. Clean the sensor probe weekly and replace the analyzer reagents monthly.

[0050] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A wastewater treatment device for denitrification, comprising an aerobic tank (12), an anaerobic tank (14), and a storage tank (1), characterized in that: A water quality detection component (6) is provided on the lower right side of the aerobic tank (12), and a detection probe (2) is provided on the upper inner side of the aerobic tank (12). The detection probe (2) is a multi-parameter integrated probe, which includes a temperature sensor and a pH sensor. A stirring device (13) is provided above the anaerobic tank (14). The water quality detection component (6) includes a DO sensor (6-1), an ORP sensor (6-2), and an online ammonia nitrogen / nitrate analyzer (6-3).

2. The wastewater treatment device for denitrification according to claim 1, characterized in that: An anaerobic tank (14) is provided on one side of the aerobic tank (12). The outer surface of the anaerobic tank (14) is a tank body (7), and the bottom of the tank body (7) is provided with an airlift sludge return pipe.

3. The wastewater treatment device for denitrification according to claim 1, characterized in that: The aerobic tank (12) and the storage tank (1) are provided with protective support railings (3), and a ladder (5) is provided below the front end of the support railings (3).

4. The wastewater treatment device for denitrification according to claim 1, characterized in that: The detection probe (2) is externally provided with a telescopic rod (9), a connecting device (10) and a holding rod (11).

5. A wastewater treatment device for denitrification according to claim 3, characterized in that: A sedimentation tank (4) is provided on the lower left side of the support railing (3).

6. The wastewater treatment device for denitrification according to claim 1, characterized in that: A control valve (8) is provided in front of the storage tank (1).

7. The wastewater treatment device for denitrification according to claim 1, characterized in that: The device is equipped with a PLC controller that dynamically adjusts the stirring speed, aeration rate and reflux ratio based on monitoring data. The DO sensor (6-1), ORP sensor (6-2) and ammonia nitrogen / nitrate online analyzer (6-3) are connected to the PLC controller via data cables.

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