Water inlet abnormity early warning system for sewage treatment plant

Abstract

The utility model relates to the technical field of sewage treatment, in particular to a sewage treatment plant water inlet abnormity early warning system which comprises a tank body, a water inlet pipe, a gas inlet pipe, a water distribution plate, a filler layer, a DO electrode and a water outlet pipe. A water distribution plate is arranged in the tank body, a water inlet pipe and an air inlet pipe are arranged on the tank body below the water distribution plate, a delivery pump is arranged on the water inlet pipe, a filtering device is arranged at the front end of the delivery pump, and the air inlet pipe is connected with a microporous aerator in the tank body; a filler layer is arranged on the water distribution plate, a DO electrode is arranged in a water body above the filler layer, an overflow weir is arranged above the tank body, and a water outlet pipe is arranged at the bottom of the overflow weir. The system is quick and timely in response and stable in operation, early warning is carried out on the abnormal water quality of inflow water at the first time when the inflow water of the sewage treatment plant is abnormal, sufficient process regulation time is provided for process regulation operation personnel, corresponding emergency measures are taken, and the risk of fluctuation of the water quality of the outflow water is reduced.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to an early warning system for abnormal influent of a wastewater treatment plant. Background Technology

[0002] With the acceleration of industrialization and urbanization, a large amount of industrial wastewater is mixed with domestic sewage and discharged into urban sewage treatment plants. Such wastewater may contain toxic substances such as heavy metals and recalcitrant organic matter, or have problems such as abnormal pH value and nutrient imbalance, which will impact the activated sludge system, causing sludge expansion, disintegration or even failure of biochemical treatment, seriously affecting the stable operation of the sewage treatment system.

[0003] To address these issues, traditional methods of manual detection suffer from significant delays and cannot capture sudden pollution events in real time. Existing methods include installing inlet warning devices at the inlet to promptly detect abnormal water levels, providing operators with ample time for process adjustments. However, these warning devices often require laying three pipelines: one for sludge return, one for the inlet, and one for the outlet. Given the typical layout of wastewater treatment plants, the distance between the inlet and the sludge return point is considerable, necessitating long sludge pipelines. Long sludge pipelines are prone to blockage, disrupting normal plant operation.

[0004] Therefore, this utility model proposes a biological toxicity detection device for wastewater influent to wastewater treatment plants. It eliminates the need for sludge pipes and other equipment, utilizes microorganisms on biological packing materials to consume dissolved oxygen in the water, and determines the toxicity of the influent accordingly. The device responds promptly and operates stably, playing a positive role in the stable operation of wastewater treatment systems. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of the existing technology by providing a wastewater treatment plant influent anomaly early warning system, so as to respond promptly when anomalies occur in the influent and avoid laying sludge pipelines, thereby making the device operate more stably.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an abnormal influent early warning system for a sewage treatment plant, comprising a tank, a water distribution plate in the tank, an inlet pipe and an air inlet pipe on the tank below the water distribution plate, a packing layer on the water distribution plate, an outlet pipe above the tank, and a DO electrode installed in the tank, the lower end of the DO electrode extending into the water above the packing layer.

[0007] Furthermore, a delivery pump is installed on the water inlet pipe, a filter device is installed at the front end of the delivery pump, and a water inlet valve is installed on the water inlet pipe at the rear end of the delivery pump.

[0008] Furthermore, the filtration device includes a first channel and a second channel connected in parallel. A first Y-type filter is provided in the first channel, and a first control valve and a second control valve are respectively provided on the left and right sides of the first Y-type filter. A second Y-type filter is provided in the second channel, and a third control valve and a fourth control valve are respectively provided on the left and right sides of the second Y-type filter.

[0009] Furthermore, a blower is installed on the air inlet pipe, and an air inlet valve is provided on the air inlet pipe at the rear end of the blower. The air inlet pipe is connected to a microporous aerator at the bottom of the tank.

[0010] Furthermore, an overflow weir is provided above the tank body, and a water outlet pipe is located at the bottom of the overflow weir, with a water outlet valve installed on the water outlet pipe.

[0011] Furthermore, a vent pipe is provided at the bottom of the tank, and a vent valve is provided on the vent pipe.

[0012] Furthermore, the vent pipe is connected to the water outlet pipe, and both the water outlet valve and the vent valve are located at the front end of the connection.

[0013] The beneficial effects of this utility model are:

[0014] 1. This utility model judges the occurrence of abnormal influent events by observing the changes in microorganisms and oxygen consumption rate (DO). It reacts quickly and promptly, can rapidly detect the biological toxicity of incoming water, and provides early warning of abnormal influent water quality at the first moment when an influent anomaly occurs in the sewage treatment plant. This gives process control and operation personnel sufficient time to adjust the process and take corresponding emergency measures to reduce the risk of fluctuations in effluent water quality.

[0015] 2. This utility model cultivates biofilm on biological packing material by itself, which eliminates the need for external sludge input and long-distance sludge transport pipelines, thus avoiding the problem of frequent sludge pipe blockage and reducing construction costs and operation and maintenance difficulties. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a utility model Figure 1 A magnified view of part A in the middle.

[0018] The names corresponding to each mark in the diagram:

[0019] 1. Tank body; 11. Inlet pipe; 111. Inlet valve; 12. Air inlet pipe; 121. Air inlet valve; 13. Outlet pipe; 131. Outlet valve; 14. Vent pipe; 141. Vent valve; 2. Transfer pump; 3. Filtration device; 31. First channel; 311. First control valve; 312. First Y-type filter; 313. Second control valve; 32. Second channel; 321. Third control valve; 322. Second Y-type filter; 323. Fourth control valve; 4. Blower; 5. Microporous aerator; 6. Water distribution plate; 7. Packing layer; 8. Overflow weir; 9. DO electrode. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0021] Embodiments of this utility model:

[0022] like Figure 1-2 As shown, the detection device in this embodiment includes a tank 1, an inlet pipe 11 at the bottom of the tank 1, a transfer pump 2 mounted on the inlet pipe 11, a filter device 3 at the front end of the transfer pump 2, and an inlet valve 111 mounted on the inlet pipe 11 at the rear end of the transfer pump 2. In this embodiment, the transfer pump 2 is a flexible pump, model RXB25-3.3, with a rated flow rate of 3.3 m³ / h. 3 / h, power 1.1k, pressure 0.3Mpa, suction head 0.3m.

[0023] The filter device 3 is installed on the water inlet pipe 11 and includes two parallel channels, namely the first channel 31 and the second channel 32. A first Y-type filter 312 is installed on the first channel 31, and a first control valve 311 and a second control valve 313 are respectively installed on the left and right sides of the first Y-type filter 312. A second Y-type filter 322 is installed on the second channel 32, and a third control valve 321 and a fourth control valve 323 are respectively installed on the left and right sides of the second Y-type filter 322.

[0024] An air inlet pipe 12 is also provided at the bottom of the tank body 1. A blower 4 is installed on the air inlet pipe 12, and an air inlet valve 121 is installed on the air inlet pipe 12 at the rear end of the blower 4. In this embodiment, the blower 4 is a rotary blower 4, model 251S, with a motor power of 0.55kW. The air inlet pipe 12 is connected to the microporous aerator 5 at the bottom of the tank body 1. In this embodiment, the microporous aerator 5 is a PHILIP7-750C type tubular corundum microporous aerator 5.

[0025] A water distribution plate 6 is installed in the tank body 1, located above the water inlet pipe 11 and the air inlet pipe 12. The water distribution plate 6 has circular through holes and is filled with packing material. In this embodiment, the packing material is a mixture of volcanic rock and bio-ball packing (with built-in hollow polyester fibers), with a particle size of approximately 100 mm. In this embodiment, the distance between the water distribution plate 6 and the bottom of the tank body 1 is 0.2 m, the thickness of the packing layer 7 is 0.5 m, the effective water depth of the reactor is 0.8 m (height of the outlet pipe 13), and the inlet flow rate is approximately 1 m³ / min. 3 / h, the stay time is approximately 0.5h.

[0026] An overflow weir 8 is provided above the tank body 1, and a water outlet pipe 13 is provided below the overflow weir 8. A water outlet valve 131 is installed on the water outlet pipe 13. A vent pipe 14 is provided at the bottom of the tank body 1, and a vent valve 141 is installed on the vent pipe 14. The vent pipe 14 is connected to the water outlet pipe 13.

[0027] A DO electrode 9 is installed above the tank body 1, and the front end of the DO electrode 9 is inserted into the water above the packing layer 7.

[0028] The principle of this utility model is as follows:

[0029] When in use, this utility model mainly uses biofilm treatment technology, which utilizes microorganisms on biological packing to consume dissolved oxygen in the water and determine the toxicity of the influent. It does not require the installation of a sludge feeding unit and agitator, thus saving operating energy and reducing pipeline laying.

[0030] In use, this utility model is installed in front of the inlet of the vortex grit chamber, drawing water from the front of the vortex grit chamber. The water here has already been treated by coarse and fine screens, and there are no large suspended or floating objects. This not only reflects changes in the incoming water in a timely manner, but also prevents the inlet pipe 11 of the device from becoming clogged. At the same time, in order to further prevent the device from becoming clogged, a filter device 3 is set at the front end of the delivery pump 2 of this utility model. The filter device 3 includes two Y-type filters connected in parallel, one for backup and one for use, to ensure continuous and stable water intake.

[0031] When the device starts operating, microbial inoculum needs to be added to the packing layer 7. Adding a carbon source and aeration can also be used to ensure successful biofilm formation on the packing layer 7. The biofilm's oxygen consumption is used to determine if any abnormalities have occurred in the influent. For example, when the blower 4 is set to a certain frequency and the biofilm is operating normally, the warning device detects DO levels of 2–3 mg / L. However, when the influent contains toxic substances, these substances disrupt microbial activity, preventing the biofilm from consuming oxygen, and the DO levels are detected as 7–11 mg / L.

[0032] In the long-term use of this utility model, in order to avoid clogging of the packing layer 7, it is necessary to perform regular flushing. The process can be carried out by backflushing or high-pressure water gun flushing. When backflushing, adjust the water inlet and the air volume of the blower 4 to perform backflushing under the condition of large air volume. Impurities in the packing layer 7 are directly discharged through the water outlet pipe 13. When using high-pressure water gun flushing, empty the device and flush the packing layer 7 from top to bottom. According to the test, the microorganisms can be restored to their original state in 2 to 3 days after flushing, without the need for additional biofilm treatment.

[0033] This invention can also be used in conjunction with influent detection and plant process control systems to achieve timely response and dynamic adjustment of the wastewater treatment system. For example, by detecting influent COD, ammonia nitrogen, pH, etc., abnormal influent conditions can be initially and quickly determined. Then, combined with the device of this invention, a more accurate judgment can be made. Once the abnormal influent condition is confirmed, the automatic control system of the plant's influent pump, the precise aeration system, the precise sludge discharge system, and the precise chemical dosing system can be linked to achieve timely control of the process. Emergency measures such as increasing aeration, increasing chemical dosage, and adjusting sludge discharge can be implemented to ensure the quality of effluent and the stable operation of the wastewater treatment system.

[0034] If the influent is red or white; the online COD of the influent is greater than 960 mg / L or the online ammonia nitrogen is greater than 90 mg / L for more than 6 hours; the online pH of the influent is less than 5.5 or greater than 9; or the dissolved oxygen of the rapid biotoxicity detection device fluctuates greatly, with a dissolved oxygen value greater than 8 mg / L, then it indicates that the influent is abnormal and has high toxicity. Operators should be reminded to adjust the process in time to ensure the stable operation of the system.

Claims

1. A wastewater treatment plant influent anomaly early warning system, characterized in that: The device includes a tank (1), in which a water distribution plate (6) is provided. A water inlet pipe (11) and an air inlet pipe (12) are provided on the tank (1) below the water distribution plate (6). A packing layer (7) is provided on the water distribution plate (6). A water outlet pipe (13) is provided above the tank (1). A DO electrode (9) is installed in the tank (1), and the lower end of the DO electrode (9) extends into the water above the packing layer (7).

2. The wastewater treatment plant influent anomaly early warning system according to claim 1, characterized in that: A delivery pump (2) is installed on the water inlet pipe (11), a filter device (3) is provided at the front end of the delivery pump (2), and a water inlet valve (111) is provided on the water inlet pipe (11) at the rear end of the delivery pump (2).

3. The sewage treatment plant influent abnormality early warning system according to claim 2, characterized in that: The filter device (3) includes a first channel (31) and a second channel (32), which are connected in parallel. A first Y-type filter (312) is provided in the first channel (31), and a first control valve (311) and a second control valve (313) are respectively provided on the left and right sides of the first Y-type filter (312). A second Y-type filter (322) is provided in the second channel (32), and a third control valve (321) and a fourth control valve (323) are respectively provided on the left and right sides of the second Y-type filter (322).

4. The wastewater treatment plant influent anomaly early warning system according to claim 1, characterized in that: A blower (4) is installed on the air inlet pipe (12), and an air inlet valve (121) is provided on the air inlet pipe (12) at the rear end of the blower (4). The air inlet pipe (12) is connected to the microporous aerator (5) at the bottom of the tank (1).

5. The sewage treatment plant influent abnormality early warning system according to claim 1, characterized in that: An overflow weir (8) is provided above the tank (1), and a water outlet pipe (13) is located at the bottom of the overflow weir (8). A water outlet valve (131) is installed on the water outlet pipe (13).

6. The sewage treatment plant influent abnormality early warning system according to claim 5, characterized in that: The bottom of the tank (1) is provided with a vent pipe (14), and a vent valve (141) is provided on the vent pipe (14).

7. The sewage treatment plant influent abnormality early warning system according to claim 6, characterized in that: The vent pipe (14) is connected to the water outlet pipe (13), and the water outlet valve (131) and the vent valve (141) are both located at the front end of the connection.

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