A continuous sewage treatment early warning device

Abstract

The utility model relates to sewage treatment technical field, concretely relates to a continuous sewage treatment early warning device, including sludge tank and sewage tank. The sludge of secondary sedimentation tank bottom is introduced into the sludge tank, is activated through aeration, is passed into the static mixer of rear end, at the same time, the water of factory area is introduced into the sewage tank after filtration, and is also passed into the static mixer of rear end, in the static mixer, the sludge and sewage are fully mixed, and the microorganism in sludge consumes dissolved oxygen, through monitoring the change of dissolved oxygen before and after static mixer, whether the water of factory area is abnormal can be judged, and the sludge tank and sewage tank are continuously operated, realize the continuous monitoring of the water of factory area. The utility model has the advantages of simple structure, convenient installation and use, can realize the continuous monitoring of the toxicity of the water of factory area, positively and beneficially plays a role in guaranteeing the continuous and stable operation of production.

Description

Technical Field

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

[0002] Wastewater refers to the wastewater generated during people's daily life and production processes. Wastewater treatment is of great significance for realizing the recycling of water resources. Currently, wastewater treatment is generally carried out in wastewater treatment plants, through a series of treatment processes to purify wastewater and recycle water resources.

[0003] Currently, wastewater treatment plants generally use biological treatment to treat nitrogen and phosphorus in wastewater. Common types include A. 2 The O process, also known as the anaerobic-anoxic-aerobic process, uses the growth and reproduction of microorganisms to convert nitrogen in wastewater into nitrogen gas and release it, while fixing phosphorus in sludge, thus achieving the process of nitrogen and phosphorus removal.

[0004] However, microorganisms are quite sensitive to water quality. When the influent contains toxic substances, such as excessive heavy metals, it will seriously affect the production and reproduction of microorganisms, which will affect the quality of the effluent. In severe cases, there is even a risk of the biological tank shutting down. Therefore, monitoring the influent quality of sewage treatment plants is particularly important. Thus, this application proposes a continuous sewage treatment early warning device, which extracts sludge from the bottom of the secondary sedimentation tank of the sewage treatment plant, aerates it, mixes it with the influent, and then monitors the changes in dissolved oxygen. The device judges whether the influent is abnormal by the change in the rate of decrease of dissolved oxygen, which plays a positive role in ensuring the stable operation of sewage treatment. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of the existing technology by providing a continuous wastewater treatment early warning device to achieve continuous early warning of the influent to wastewater treatment plants.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a continuous wastewater treatment early warning device, comprising a sludge tank and a wastewater tank, wherein a sludge inlet and an air inlet are provided at the bottom of the sludge tank, the sludge inlet being connected to the bottom of the secondary sedimentation tank, the air inlet being connected to the aeration disc in the sludge tank, a sludge outlet is provided at the top of the sludge tank, the sludge outlet being connected to a sludge outlet pipe, and the sludge outlet pipe being connected to one inlet of a static mixer; a water inlet is provided on the wastewater tank, the water inlet being connected to a water distributor, a water outlet is provided at the bottom of the wastewater tank, the water outlet being connected to a water outlet pipe, the water outlet pipe being connected to another inlet of the static mixer, a first DO electrode is provided on the sludge outlet pipe at the front end of the static mixer, and a second DO electrode is provided on the liquid outlet pipe at the outlet end of the static mixer.

[0007] Furthermore, both the sludge tank and the wastewater tank are equipped with a stirrer.

[0008] Furthermore, the sludge inlet is connected to the sludge inlet pipe, which is connected to the bottom of the secondary sedimentation tank. A sludge pump is installed on the sludge inlet pipe, and a sludge inlet valve is installed at the rear end of the sludge pump.

[0009] Furthermore, the air inlet is connected to the aeration pipe, a blower is installed on the aeration pipe, and an air inlet valve is installed at the rear end of the blower.

[0010] Furthermore, the water inlet is connected to the water inlet pipe, a filter is installed on the water inlet pipe, a water inlet pump is installed at the rear end of the filter, and a water inlet valve is installed at the rear end of the water inlet pump.

[0011] Furthermore, a first flow indicator transmitter is installed on the sludge outlet pipe, and a second flow indicator transmitter is installed on the water outlet pipe.

[0012] Furthermore, both the sludge tank and the sewage tank are equipped with a drain port at the bottom, which is connected to a drain pipe, and a drain valve is installed on the drain pipe.

[0013] Furthermore, the first DO electrode, the second DO electrode, the first flow indicator transmitter, and the second flow indicator transmitter are respectively connected to the field PLC, and the field PLC is connected to the alarm.

[0014] The beneficial effects of this utility model are: This utility model has a simple structure, is easy to install and use, and can realize continuous monitoring of the toxicity of the water entering the plant area, which plays a positive and beneficial role in ensuring continuous and stable production. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] The names corresponding to each mark in the diagram:

[0017] 1. Sludge tank; 11. First agitator; 12. Sludge inlet; 13. Sludge outlet; 14. Air inlet; 15. First drain outlet; 16. Aeration disc; 2. Sludge inlet pipe; 21. Sludge inlet pump; 22. Sludge inlet valve; 3. Aeration pipe; 31. Blower; 32. Air inlet valve; 4. First drain pipe; 41. First drain valve; 5. Sludge outlet pipe; 51. First flow indicator transmitter; 52. First DO electrode; 6. Static mixer; 61. Liquid outlet pipe; 611. Second DO electrode; 7. Wastewater tank; 71. Second agitator; 72. Water inlet; 73. Water outlet; 74. Second drain outlet; 8. Water inlet pipe; 81. Filter; 82. Water inlet pump; 83. Water inlet valve; 84. Water distributor; 9. Water outlet pipe; 91. Second flow indicator transmitter; 10. Second drain pipe; 101. Second drain valve. Detailed Implementation

[0018] 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.

[0019] Embodiments of this utility model:

[0020] As shown in the figure, this embodiment includes a sludge tank 1 and a wastewater tank 7. A first agitator 11 is installed in the sludge tank 1. A sludge inlet 12 is located at the bottom of the sludge tank 1 and is connected to a sludge inlet pipe 2. A sludge pump 21 is installed on the sludge inlet pipe 2, and a sludge inlet valve 22 is located at the rear end of the sludge pump. An air inlet 14 is located at the bottom of the sludge tank 1 and is connected to an aeration disc 16 inside the sludge tank 1. The air inlet 14 is also connected to an aeration pipe 3 outside the sludge tank 1, and a blower 31 is installed on the aeration pipe 3. An air inlet valve 32 is provided at the rear end of the blower 31, and an air outlet is provided at the top of the sludge tank 1. A first drain outlet 15 is provided at the bottom of the sludge tank 1, and the first drain outlet 15 is connected to the first drain pipe 4. A first drain valve 41 is provided on the first drain pipe 4. A sludge outlet 13 is provided at the top of the sludge tank 1, and the sludge outlet 13 is connected to the sludge outlet pipe 5. A first flow indicator transmitter 51 and a first DO electrode 52 are provided on the sludge outlet pipe 5. The end of the sludge outlet pipe 5 is connected to one inlet of the static mixer 6.

[0021] A second agitator 71 is installed in the sewage tank 7. An inlet 72 is installed above the sewage tank 7 and is connected to an inlet pipe 8. A filter 81 is installed on the inlet pipe 8. An inlet pump 82 is installed at the rear end of the filter 81 and an inlet valve 83 is installed at the rear end of the inlet pump 82. The inlet pipe 8 extends to the bottom of the sewage tank 7 and is connected to a water distributor 84. A second drain outlet 74 is installed at the bottom of the sewage tank 7 and is connected to a second drain pipe 10. A second drain valve 101 is installed on the second drain pipe 10. An outlet 73 is installed at the bottom of the sewage tank 7 and is connected to an outlet pipe 9. A second flow indicator transmitter 91 is installed on the outlet pipe 9 and is connected to another inlet of a static mixer 6. The outlet of the static mixer 6 is connected to an outlet pipe 61 and a second DO electrode 611 is installed on the outlet pipe 61.

[0022] The principle of this utility model is as follows:

[0023] In use, this utility model involves a secondary sedimentation tank (such as A) for biological wastewater treatment.2 The excess sludge from the secondary sedimentation tank of process O is pumped to sludge tank 1, where it is activated by aeration. During this process, the aeration time of the sludge in sludge tank 1 is controlled to be 20-30 minutes (the sludge flow rate is controlled so that the sludge residence time in sludge tank 1 is 20-30 minutes). At the same time, the wastewater influent from the wastewater treatment plant is filtered and pumped to wastewater tank 7, and then flows out from the bottom of wastewater tank 7. The hydraulic residence time in wastewater tank 7 is controlled to be 5-10 minutes. The sludge in sludge tank 1 and the wastewater in wastewater tank 7 are mixed in static mixer 6 (e.g., 1:1 volume mixing).

[0024] During the process, the dissolved oxygen content is measured on the sludge outlet pipe 5 using the first DO electrode 52. When the sludge is mixed with the wastewater in the static mixer 6, the microorganisms consume dissolved oxygen. The mixing time of the sludge and wastewater mixture in the static mixer 6 is set to 2-3 minutes. Therefore, the monitoring value of the second DO electrode 611 on the liquid outlet pipe 61 naturally decreases. When the influent is abnormal, the monitoring value of the second DO electrode 611 will be abnormal, and the on-site PLC can issue an early warning to remind the operators to deal with it in time. It should be noted that the first DO electrode 52 monitors the dissolved oxygen content in the sludge. When it is mixed with the wastewater, the initial dissolved oxygen content after mixing is related to the flow rate of the sludge and wastewater. Therefore, a certain conversion is required. The process is relatively simple and will not be described in detail.

[0025] It should also be noted that DO electrodes are used in this invention. In order to ensure the accuracy of the measurement, the DO electrodes need to be maintained regularly. During the implementation of this invention, each DO electrode can be kept on standby to ensure the continuous and stable operation of the device.

Claims

1. A continuous wastewater treatment early warning device, characterized in that: The system includes a sludge tank (1) and a wastewater tank (7). The sludge tank (1) has a sludge inlet (12) and an air inlet (14) at its bottom. The sludge inlet (12) is connected to the bottom of the secondary sedimentation tank, and the air inlet (14) is connected to the aeration disc (16) in the sludge tank (1). A sludge outlet (13) is located above the sludge tank (1) and is connected to a sludge outlet pipe (5). The sludge outlet pipe (5) is connected to one inlet of a static mixer (6). A water inlet is located on the wastewater tank (7). (72) The inlet (72) is connected to the water distributor (84). An outlet (73) is provided at the bottom of the sewage tank (7). The outlet (73) is connected to the outlet pipe (9). The outlet pipe (9) is connected to the other inlet of the static mixer (6). A first DO electrode (52) is provided on the sludge outlet pipe (5) at the front end of the static mixer (6). The outlet end of the static mixer (6) is connected to the liquid outlet pipe (61). A second DO electrode (611) is provided on the liquid outlet pipe (61).

2. The continuous wastewater treatment early warning device according to claim 1, characterized in that: Both the sludge tank (1) and the sewage tank (7) are equipped with a stirrer.

3. The continuous wastewater treatment early warning device according to claim 1, characterized in that: The sludge inlet (12) is connected to the sludge inlet pipe (2), which is connected to the bottom of the secondary sedimentation tank. A sludge pump (21) is installed on the sludge inlet pipe (2), and a sludge valve (22) is installed at the rear end of the sludge pump (21).

4. The continuous wastewater treatment early warning device according to claim 1, characterized in that: The air inlet (14) is connected to the aeration pipe (3), and a blower (31) is installed on the aeration pipe (3). An air inlet valve (32) is installed at the rear end of the blower (31).

5. The continuous wastewater treatment early warning device according to claim 1, characterized in that: The water inlet (72) is connected to the water inlet pipe (8), a filter (81) is installed on the water inlet pipe (8), a water inlet pump (82) is installed at the rear end of the filter (81), and a water inlet valve (83) is installed at the rear end of the water inlet pump (82).

6. The continuous wastewater treatment early warning device according to claim 1, characterized in that: The mud outlet pipe (5) is equipped with a first flow indicator transmitter (51), and the water outlet pipe (9) is equipped with a second flow indicator transmitter (91).

7. The continuous wastewater treatment early warning device according to claim 1, characterized in that: Both the sludge tank (1) and the sewage tank (7) are provided with a drain port at the bottom, which is connected to the drain pipe, and a drain valve is provided on the drain pipe.

8. The continuous wastewater treatment early warning device according to any one of claims 1-7, characterized in that: The first DO electrode (52), the second DO electrode (611), the first flow indicator transmitter (51), and the second flow indicator transmitter (91) are respectively connected to the field PLC, and the field PLC is connected to the alarm.

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