Magnetized activated sludge feeding device of buried industrial wastewater biochemical treatment system

Abstract

The utility model discloses a magnetized activated sludge feeding device of a buried industrial wastewater biochemical treatment system. The magnetized activated sludge feeding device comprises a buried box body, and a sludge inlet area, a primary mixing area, a magnetizing area, a secondary mixing area and a discharging feeding area which are sequentially arranged in the box body, the sludge feeding area comprises a feeding hole formed in the top of one end of the box body and a spraying device; a first-stage mixing stirrer is arranged in the first-stage mixing area, a magnetizing device is arranged in the magnetizing area, a second-stage mixing stirrer is arranged in the second-stage mixing area, and a sludge pump and a conveying pipeline are arranged in the discharging and feeding area. The system is used for overcoming the defects of poor timeliness effectiveness, high cost, severe working environment, multiple potential safety hazards and the like when a conventional method is adopted to deal with instantaneous collapse of a biochemical system. The device is efficient in integration, simple in operation, high in automation degree and stable in operation effect, and is obviously improved compared with a conventional mode.

Description

Technical Field

[0001] This utility model relates to the field of activated regeneration technology of biochemical sludge in industrial wastewater, and in particular to a magnetized activated sludge dosing device for a buried industrial wastewater biochemical treatment system. Background Technology

[0002] Industrial park wastewater is complex, with high concentration and large fluctuations. Toxic and harmful substances frequently impact the biological system, which in severe cases can lead to instantaneous collapse of the biological system and death of sludge bacteria. To ensure the wastewater treatment system's ability to treat pollutants, fresh sludge needs to be added frequently to ensure the normal operation of the biological system.

[0003] Currently, the emergency addition of activated sludge in actual engineering projects mainly includes extensive addition and simple temporary device addition, that is, the dewatered sludge is directly added to the biological system by crane, manual labor, or machinery (temporary pump).

[0004] Manual sludge addition is time-consuming and labor-intensive. Using a crane for sludge addition is limited by the crane arm's length, making even distribution impossible. Furthermore, the freshly added dry sludge is still in lumps and highly viscous, requiring prolonged aeration to return to a flocculent state. Additionally, the biological treatment system is equipped with arched deodorizing and sealing covers that must be opened during addition, increasing workload. The drawback of this simplified addition method is the need for temporary on-site installation, which, given the time-sensitive nature of wastewater treatment, often results in nighttime operations with compromised safety and timeliness.

[0005] Chinese Invention Patent Publication No. CN106861538B adopts a vehicle-mounted mobile activated sludge dosing device. (1) The sludge inlet of the vehicle-mounted device is higher than the ground, which is not convenient for the sludge bacteria transport vehicle to unload by natural gravity. It needs to be equipped with a feeding lifting device; (2) Most industrial park sewage treatment plants are located in remote areas. Considering the long transportation distance, the vehicle-mounted dosing device is slightly insufficient in terms of emergency response time; (3) It is not magnetized, so the sludge dispersion after dosing is poor and the ability to withstand toxins is weak. In order to shorten the emergency response time, reduce the cost of sludge dosing, improve the uniformity of the added sludge in the biological treatment tank, quickly restore the sludge activity of the biological system, maximize the reduction of the negative effects of the sudden situation on the surrounding water environment and maintain the clean and hygienic environment of the plant area, it is necessary to develop a buried industrial wastewater biological treatment system magnetized activated sludge dosing device. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of the existing technology and solve the problems of time-consuming, labor-intensive, costly, and fraught with safety hazards when adding fresh activated sludge in an emergency after the sludge in the industrial wastewater biochemical system has been poisoned using conventional devices and methods. The goal is to restore the activity of the sludge in the biochemical system in a short time and improve its shock resistance.

[0007] The purpose of this utility model is achieved by the following technical solution: a buried industrial wastewater biochemical treatment system magnetized activated sludge dosing device, comprising a buried tank and a sludge inlet zone, a primary mixing zone, a magnetization zone, a secondary mixing zone, and a discharge dosing zone arranged sequentially within the tank; the sludge inlet zone includes an inlet located at the top of one end of the tank and a spray device; the primary mixing zone is equipped with a primary mixing agitator, the magnetization zone is equipped with a magnetization device, the secondary mixing zone is equipped with a secondary mixing agitator, and the discharge dosing zone is equipped with a sludge pump and a conveying pipeline.

[0008] Preferably, the magnetization device includes a magnetizing stirrer and a magnetic powder adding tube. The magnetizing stirrer is installed on the top cover of the magnetization zone of the box. The blades of the magnetizing stirrer are connected to a motor installed on the top cover of the box via a connecting shaft. The inlets of the magnetic powder adding tube are located on both sides of the magnetizing stirrer.

[0009] Preferably, the primary mixer is a plug-flow type, the impeller diameter of the primary mixer is in the range of 300-480mm, and the angle between the impeller and the wall is 30-60°.

[0010] Preferably, the inner wall of the box is lined with polytetrafluoroethylene, the length-to-height ratio of the box is in the range of 4:1 to 5:1, the length-to-width ratio of the box is in the range of 2.5:1 to 4:1, and the height of the box is in the range of 2 to 3m.

[0011] Preferably, the mud inlet area is equipped with a fiberglass movable cover plate, the mud inlet is the same width as the box body, and its length accounts for 1 / 5 to 1 / 4 of the total length of the box body. A spraying device is provided above the mud inlet area, and the bottom plate is set with a slope of 1% to 1.5%.

[0012] Preferably, the magnetization zone is the same width as the housing and its length accounts for 1 / 3 to 1 / 2 of the total length of the housing; the magnetization mixer is a three-blade mixer.

[0013] Preferably, the side wall of the magnetized zone is provided with a maintenance ladder.

[0014] Preferably, the secondary mixer is a plug-flow type, with an impeller diameter ranging from 300 to 480 mm, an angle of 30 to 60° with the wall, and is arranged diagonally to the primary mixer.

[0015] Preferably, each of the box areas is provided with a hinged opening, and a primary partition and a secondary partition are provided between the primary mixing area and the magnetization area, and between the magnetization area and the secondary mixing area, respectively; the bottom plates of the primary mixing area, the magnetization area, and the secondary mixing area are all provided with a slope of 1% to 1.5%.

[0016] Preferably, the length of the first-level partition is equal to the width of the box, and the height of the first-level partition is less than the height of the side wall of the box.

[0017] This invention offers the following advantages: The activated sludge dosing device provides a way to evenly distribute and add sludge bacteria into the biochemical system, improving the sludge's tolerance to toxins and restoring the activity of some deactivated sludge. It features a short emergency response time, high safety, good system recovery effect, and a high degree of automation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the magnetized activated sludge dosing device (without showing the partition) of the underground industrial wastewater biochemical treatment system of this utility model.

[0019] Figure 2 This is a schematic diagram of the frame (display partition) of the magnetized activated sludge dosing device of the underground industrial wastewater biochemical treatment system according to Embodiment 1 of this utility model.

[0020] Figure 3 This is a schematic diagram of the frame (display partition) of the magnetized activated sludge dosing device of the underground industrial wastewater biochemical treatment system according to Embodiment 2 of this utility model.

[0021] Figure label:

[0022] 1. Container; 2. Spraying device; 3. Primary mixer; 4. Magnetizing device; 5. Maintenance ladder; 6. Secondary mixer; 7. Sludge pump; 8. Conveying pipeline; 9. Primary baffle; 10. Secondary baffle; 11. Opening; 12. Lifting lug. Detailed Implementation

[0023] Example 1

[0024] like Figure 1 , 2 As shown, this utility model discloses a magnetized activated sludge dosing device for a buried industrial wastewater biochemical treatment system, including a buried tank 1 and a sludge inlet zone, a primary mixing zone, a magnetization zone, a secondary mixing zone, and a discharge dosing zone arranged sequentially within the tank 1. A primary baffle 9 and a secondary baffle 10 are respectively provided between the primary mixing zone and the magnetization zone, and between the magnetization zone and the secondary mixing zone. The sludge inlet zone includes a feed inlet with an opening located at the top of one end of the tank 1 and a spray device 2. A primary mixing agitator 3 is provided in the primary mixing zone. A magnetization device 4 is provided in the magnetization zone. A secondary mixing agitator 6 is provided in the secondary mixing zone. A sludge pump 7 and a conveying pipeline 8 are provided in the discharge dosing zone.

[0025] The sludge pump 7 is located in the pump pit at the bottom of the box 1, and the conveying pipeline 8 is the sludge discharge pipe. The inlet of the sludge discharge pipe is located on the side wall of the box, opposite to the feed inlet.

[0026] The magnetization device 4 includes a magnetizing stirrer and a magnetic powder adding pipe. The magnetizing stirrer is installed on the top cover of the box 1. The blades of the magnetizing stirrer are connected to the motor installed on the top cover of the box via a connecting shaft. The magnetic powder adding pipe is located on both sides of the magnetizing stirrer.

[0027] The primary mixer 3 is a plug-flow type, and the impeller diameter of the primary mixer 3 ranges from 300 to 480 mm, with an angle of 30 to 60° between its arrangement and the wall. Submersible mixers commonly used in the market have an impeller diameter range of 300 to 480 mm and an angle of 30 to 60° between their arrangement and the wall. This allows for thorough mixing, resulting in good dispersion of the activated sludge and improving the subsequent magnetization effect.

[0028] The magnetizing stirrer is a special three-blade type, and the magnetic powder dosage is 3-5 mg / L.

[0029] The second partition 10 is movably connected to the side wall of the box 1. The second partition 10 is flush with the side wall of the box 1. A lifting lug 12 is provided at the center of the upper end of the second partition 10. A lifting device is provided above the second partition 10.

[0030] The box 1 is lined with polytetrafluoroethylene. The length-to-height ratio of the box 1 is in the range of 4:1 to 5:1, the length-to-width ratio of the box 1 is in the range of 2.5:1 to 4:1, and the height of the box 1 is in the range of 2 to 3m.

[0031] The mud inlet area is equipped with a fiberglass movable cover plate. The width of the mud inlet is the same as that of the box body 1, and the length accounts for 1 / 5 to 1 / 4 of the total length of the box body. A spraying device 2 is installed above the mud inlet area, and the bottom plate is set with a slope of 1% to 1.5%.

[0032] The width of the magnetization zone is the same as the width of the box body, and its length accounts for 1 / 3 to 1 / 2 of the total length of the box body; the magnetization paddle mixer is a special three-blade type.

[0033] A maintenance ladder 5 is provided on the side wall of the magnetized area.

[0034] The secondary mixing agitator is a plug-flow type, with an impeller diameter ranging from 300 to 480 mm. Its arrangement angle with the wall is 30 to 60°, and it is arranged diagonally to the primary mixing agitator.

[0035] The box body 1 area is provided with a liftable opening, and the bottom plates of the primary mixing zone, magnetization zone and secondary mixing zone are all provided with a slope of 1% to 1.5%.

[0036] The sludge pump suction port is equipped with a cylindrical screen to prevent clogging. The conveying pipeline 8 is an HDPE sludge dosing pipeline selected within the economic flow rate range. The conveying pipeline 8 is equipped with an electric valve to control the sludge dosing area.

[0037] The sludge truck unloads the dehydrated sludge, which has been dewatered to a moisture content of about 80%, into the sludge inlet area of ​​the underground box 1. A spraying device 2 is installed above the sludge inlet area. The spraying head is connected to the plant’s tap water supply network to spray water evenly onto the solid activated sludge in the sludge inlet area.

[0038] After the sludge in the sludge inlet is diluted with water, it flows into the primary mixing zone through the inclined angle of the bottom plate. The moisture content of the wet sludge is >90%. The primary mixing agitator 3 is driven by a motor to mix the sludge-water mixture.

[0039] The wet sludge, after primary mixing, overflows through the first partition 9 and enters the magnetization zone above it. The height of the first partition 9 is less than the height of the side wall of the housing 1. Within the magnetization zone, the magnetization device 4 is activated. The magnetization device 4 includes a dedicated three-bladed mixer and a magnetic powder dosing device. After the sludge is magnetized, the second partition 10 is lifted, and the sludge enters the secondary mixing zone through an opening. A lifting lug 12 is located at the center of the upper end of the second partition 10, and a lifting device is located above the second partition 10.

[0040] The sludge in the secondary mixing zone is further mixed evenly under the spiral linear mixing action of the secondary mixing agitator 6, and the sludge is pushed into the sludge feeding pump 7 suction well under the action of the secondary mixing agitator 6.

[0041] After the sludge is sucked up by the discharge sludge pump, the sludge enters the carbon steel conveying pipeline 8, and the range of sludge addition is controlled by the opening and closing of the electric valve installed on the pipeline.

[0042] Example 2

[0043] like Figure 3 The secondary partition 10 is located between the magnetization zone and the secondary mixing zone. The secondary partition 10 is fixedly connected to the side wall of the box 1. The secondary partition 10 has an opening 11 on the side near the secondary mixing agitator. The magnetized sludge enters the secondary mixing zone through the opening 11.

[0044] The above are merely preferred embodiments of this utility model. It should be noted that the above preferred embodiments should not be considered as limitations on this utility model, and the scope of protection of this utility model should be determined by the scope defined in the claims. For those skilled in the art, several improvements and modifications can be made without departing from the spirit and scope of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A buried industrial wastewater biochemical treatment system magnetization activated sludge dosing device, characterized in that, It includes an underground box (1) and a sludge inlet zone, a primary mixing zone, a magnetization zone, a secondary mixing zone and a discharge and feeding zone arranged sequentially in the box (1); the sludge inlet zone includes a feed port and a spray device (2) located at the top of one end of the box (1); the primary mixing zone is equipped with a primary mixing agitator (3); the magnetization zone is equipped with a magnetization device (4); the secondary mixing zone is equipped with a secondary mixing agitator (6); and the discharge and feeding zone is equipped with a sludge pump (7) and a conveying pipeline (8).

2. The magnetic active sludge dosing device for the buried industrial wastewater biochemical treatment system according to claim 1, characterized in that, The magnetization device (4) includes a magnetizing mixer and a magnetic powder adding tube. The magnetizing mixer is installed on the top cover of the magnetization zone of the box (1). The blades of the magnetizing mixer are connected to the motor installed on the top cover of the box (1) via a connecting shaft. The inlets of the magnetic powder adding tube are located on both sides of the magnetizing mixer.

3. The magnetic activated sludge dosing device for the buried industrial wastewater biochemical treatment system according to claim 1, characterized in that, The primary mixer (3) is a push-flow type, and the impeller diameter of the primary mixer (3) ranges from 300 to 480 mm, with an arrangement angle of 30 to 60° with the wall.

4. The magnetized activated sludge dosing device for the underground industrial wastewater biochemical treatment system according to claim 1, characterized in that, The inner wall of the box (1) is lined with polytetrafluoroethylene. The length-to-height ratio of the box (1) is in the range of 4:1 to 5:1, the length-to-width ratio of the box (1) is in the range of 2.5:1 to 4:1, and the height of the box (1) is 2 to 3m.

5. The magnetic activated sludge dosing device for buried industrial wastewater biochemical treatment system according to claim 1, characterized in that, The mud inlet area is equipped with a fiberglass movable cover plate. The mud inlet is the same width as the box body (1) and its length accounts for 1 / 5 to 1 / 4 of the total length of the box body (1). A spraying device (2) is provided above the mud inlet area, and the bottom plate is set with a slope of 1% to 1.5%.

6. The magnetic activated sludge dosing device for buried industrial wastewater biochemical treatment system according to claim 2, characterized in that, The magnetization zone is the same width as the box (1) and its length accounts for 1 / 3 to 1 / 2 of the total length of the box (1); the magnetization mixer is a three-blade mixer.

7. The magnetic activated sludge dosing device for buried industrial wastewater biochemical treatment system according to claim 1 or 6, characterized in that, It also includes a maintenance ladder (5), which is located on the side wall of the magnetized area.

8. The magnetic activated sludge dosing device for buried industrial wastewater biochemical treatment system according to claim 1, characterized in that, The secondary mixing agitator (6) is a push-flow type, with an impeller diameter ranging from 300 to 480 mm and an angle of 30 to 60° with the wall. The secondary mixing agitator (6) is arranged diagonally with the primary mixing agitator (3).

9. The magnetic activated sludge dosing device for buried industrial wastewater biochemical treatment system according to claim 1, characterized in that, The box (1) area is provided with a liftable opening. A primary partition (9) and a secondary partition (10) are provided between the primary mixing zone and the magnetization zone, and between the magnetization zone and the secondary mixing zone, respectively. The bottom plates of the primary mixing zone, the magnetization zone and the secondary mixing zone are all provided with a slope of 1% to 1.5%.

10. The magnetized activated sludge dosing device for the underground industrial wastewater biochemical treatment system according to claim 9, characterized in that, The length of the first-level partition (9) is equal to the width of the box (1), and the height of the first-level partition (9) is less than the height of the side wall of the box (1).

Images