A mist forest deodorization system for a pretreatment section of a sewage plant

Abstract

This utility model relates to the field of wastewater treatment technology, specifically to a mist-based deodorization system for the pretreatment section of a wastewater treatment plant, including a batching system and a spraying system. The batching system includes a water storage tank, a chemical storage tank, and a mixing tank. Water from the water storage tank and deodorizing agent from the chemical storage tank are transported to the mixing tank in a specific ratio. The mixing tank then transports the prepared chemical solution to the bar screen and primary sedimentation tank via a pipeline. A pump is installed on the pipeline, and online COD and ammonia nitrogen monitors, as well as a flow indicator transmitter, are installed between the bar screen and primary sedimentation tank, with the monitoring data linked to the pump. This utility model enables continuous and stable preparation of the deodorizing agent, facilitating subsequent use. It also ensures the timely delivery of the prepared chemical solution to the bar screen and primary sedimentation tank and allows for timely adjustment of the spray volume based on the influent conditions, thus playing a positive role in protecting the plant environment.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a mist deodorization system for the pretreatment section of a wastewater treatment plant. Background Technology

[0002] Wastewater treatment plants generate and emit malodorous gases during wastewater transportation and treatment. These gases primarily consist of volatile substances such as hydrogen sulfide (H₂S), ammonia (NH₃), and mercaptans, resulting in a complex and unpleasant odor. The pretreatment stage of wastewater treatment plants, due to the large volume of untreated wastewater transported, experiences the most severe odor emission. These malodorous gases are volatile; their molecules diffuse in the air, corroding mechanical equipment. Inhalation of these gases causes an extremely unpleasant odor and poses health risks.

[0003] To reduce odor concentration and prevent the corrosive effects of unpleasant odors on equipment and the impact on wastewater treatment plant employees, the production environment, and the surrounding atmosphere, wastewater treatment plants in my country typically employ the following deodorization methods for the pretreatment stage: first, the process section is completely isolated using glass enclosures, and then deodorization is carried out using methods such as chemical absorption, biological filters, and activated carbon adsorption. However, these methods have drawbacks such as high equipment investment, high operating costs, and unstable treatment effects, causing inconvenience to actual production operations.

[0004] Therefore, this utility model proposes a fogging deodorization system for the pretreatment section of a sewage treatment plant. This system atomizes the agent molecules into tiny particles, which come into full contact with the malodorous gas molecules in the air. By utilizing the adsorption, dissolution, and oxidation effects of the agent, the malodorous gas molecules are captured and transformed into harmless substances, thereby achieving the purpose of deodorization. This solves the technical problems of high equipment investment and high operating costs in traditional deodorization processes. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of the existing technology by providing a mist-based deodorization system for the pretreatment stage of a wastewater treatment plant. This system solves the technical problems of high equipment investment and high operating costs in traditional deodorization processes. It also enables stable configuration of the deodorizing agent solution and allows for reasonable adjustment of the deodorizing agent spraying volume based on the influent conditions, making it more convenient for use in industrial production.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a fogging deodorization system for the pretreatment section of a sewage treatment plant, comprising a batching system and an atomization system;

[0007] The batching system includes a water storage tank, a reagent storage tank, and a batching tank. The water storage tank and the reagent storage tank are connected to the batching tank via a batching pipeline, and a proportioning pump is installed on the batching pipeline.

[0008] The atomization system includes a delivery pipeline, the front end of which is connected to a reagent storage tank, and the rear end of which extends to the grit chamber and the primary sedimentation tank respectively. A delivery pump is installed on the delivery pipeline. Atomizing nozzles are arranged around the grit chamber and the primary sedimentation tank, and the rear end of the delivery pipeline is connected to each atomizing nozzle.

[0009] Furthermore, the water storage tank is provided with an inlet at the top, which is connected to an inlet pipeline. An inlet master control valve is provided on the inlet pipeline, and a filter is provided at the rear end of the inlet master control valve. Two filters are connected in parallel, with one in standby and one in use. Control valves are provided on the inlet pipelines on both sides before and after each filter. The inlet is connected to a float valve inside the water storage tank. A first vent is provided at the top of the water storage tank, and an outlet is provided at the bottom of the water storage tank, which is connected to a dispensing pipeline.

[0010] Furthermore, the above-ground part of the drug storage tank is provided with a drug addition port, a second vent is provided above the drug storage tank, and a drug outlet is provided at the bottom of the drug storage tank, which is connected to the dispensing pipeline.

[0011] Furthermore, a feed inlet is provided above the mixing tank, which is connected to the mixing pipeline. The feed inlet is arranged tangentially along the tank body. A third vent is provided above the mixing tank, and a discharge outlet is provided below the mixing tank, which is connected to the conveying pipeline.

[0012] Furthermore, a first conveying hose is provided around the perimeter of the bar screen tank, and a second conveying hose is provided around the perimeter of the primary sedimentation tank. The first and second conveying hoses are fixed according to the railings of the bar screen tank and the primary sedimentation tank, respectively. The first and second conveying hoses are respectively connected to the rear end of the conveying pipeline, and atomizing nozzles are respectively arranged on the first and second conveying hoses.

[0013] Furthermore, the wastewater inlet pipe between the bar screen and the primary sedimentation tank is equipped with an online COD monitor, an online ammonia nitrogen monitor, and a flow indicator transmitter. The online COD monitor, the online ammonia nitrogen monitor, and the flow indicator transmitter are all connected to a local PLC, which is connected to a peristaltic pump.

[0014] Furthermore, the medicine storage tank is equipped with a first liquid level sensor, which is a low-level sensor. The first liquid level sensor is connected to a field PLC, and the field PLC is connected to a field warning device.

[0015] Furthermore, the mixing tank is equipped with a second liquid level sensor and a third liquid level sensor. The second liquid level sensor is a high-level sensor, and the third liquid level sensor is a low-level sensor. The second liquid level sensor and the third liquid level sensor are respectively connected to the field PLC, and the field PLC is connected to the proportional pump.

[0016] The beneficial effects of this utility model are as follows: This utility model adopts an atomized spraying method, which solves the technical problems of high equipment investment and high operating costs in traditional deodorization processes. On the other hand, it can also achieve continuous and stable preparation of deodorizing agents, which is convenient for subsequent use. The prepared agent solution is transported to the bar screen and primary sedimentation tank, and the spraying volume of the agent solution can be adjusted in a timely manner according to the water inflow, thus playing a positive role in ensuring the plant environment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the ingredient preparation section of this utility model;

[0018] Figure 2 This is a top view schematic diagram of the ingredient tank of this utility model;

[0019] Figure 3 This is a schematic diagram of the spraying part of this utility model;

[0020] Figure 4 This is a utility model Figure 2 A magnified view of part A in the diagram.

[0021] The names corresponding to each mark in the diagram:

[0022] 1. Inlet water pipeline; 11. Main inlet water control valve; 12. Filter; 13. Control valve; 2. Water storage tank; 21. Inlet; 22. Outlet; 23. Float valve; 24. First vent; 3. Batching pipeline; 31. Proportional pump; 4. Chemical storage tank; 41. Chemical addition port; 42. Chemical outlet; 43. Second vent; 44. First level sensor; 5. Batching tank; 51. Feed inlet; 52. Discharge outlet; 53. ... 54. Three breathing ports; 55. Second liquid level sensor; 6. Third liquid level sensor; 7. Delivery pipeline; 8. Delivery pump; 9. First delivery hose; 10. Second delivery hose; 11. Cable tie; 22. Atomizing nozzle; 33. Bar screen; 44. First railing; 55. Primary sedimentation tank; 66. Second railing; 77. Wastewater inlet pipeline; 88. COD online monitor; 99. Ammonia nitrogen online monitor; 90. Flow indicator transmitter. Detailed Implementation

[0023] 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.

[0024] Embodiments of this utility model:

[0025] like Figure 1-4 As shown, the deodorization system in this embodiment includes a mixing system and a spraying system. The spraying system includes a water storage tank 2 and a chemical storage tank 4. The water in the water storage tank 2 and the deodorant in the chemical storage tank 4 are transported to the mixing tank 5 through the mixing pipeline 3. A proportioning pump 31 is installed on the mixing pipeline 3. In this embodiment, the deodorant is a plant-based deodorant, which is commercially available (Jinan Guanlong Chemical Co., Ltd., Zhenguanlong GLO1A 25KG / barrel).

[0026] A water inlet 21 is provided on the water storage tank 2, and the water inlet 21 is connected to the water inlet pipeline 1. A main water inlet control valve 11 is provided on the water inlet pipeline 1, and a filter 12 is provided at the rear end of the main water inlet control valve 11. In this embodiment, the filter 12 is a Y-type filter 12 and is set up with one filter for backup. A control valve 13 is provided on both the front and rear sides of each filter 12. The interior of the water storage tank 2 with the water inlet 21 is connected to the float valve 23. A first vent 24 is provided on the top of the water storage tank 2, and a water outlet 22 is provided on the bottom of the water storage tank 2. The water outlet 22 is connected to the water inlet of the proportional pump 31 through the feed pipeline 3. In this embodiment, the water inlet pipeline 1 is a plant area greywater reuse pipeline.

[0027] A drug addition port 41 is provided on the drug storage tank 4. In this embodiment, the plant deodorant is added manually. A second breathing port 43 is provided above the drug storage tank 4. A drug outlet 42 is provided at the bottom of the drug storage tank 4. The drug outlet 42 is connected to the additive inlet pipe of the proportioning pump 31 on the dispensing pipeline 3.

[0028] An inlet 51 is provided above the mixing tank 5. The inlet 51 is connected to the mixing pipeline 3 and is arranged tangentially along the tank body of the mixing tank 5. A third vent 53 is provided above the mixing tank 5. An outlet 52 is provided at the bottom of the mixing tank 5 and is connected to the conveying pipeline 6. A conveying pump 61 is provided on the conveying pipeline 6. In this embodiment, the conveying pump 61 is a peristaltic pump.

[0029] The delivery pipeline 6 splits into two lines after the delivery pump 61, leading to the grit chamber 7 and the primary sedimentation tank 8 of the wastewater treatment plant, respectively. A first delivery hose 62 is installed around the grit chamber 7, and a second delivery hose 63 is installed around the primary sedimentation tank 8. The first delivery hose 62 is arranged according to the first railing 71 around the grit chamber 7, and the second delivery hose 63 is arranged according to the second railing 81 around the primary sedimentation tank 8 (Note: According to existing design specifications, the grit chamber 7 and the primary sedimentation tank 8 are generally equipped with railings to ensure operational safety. If not, the first delivery hose 61 and the second delivery hose 63 can be replaced with rigid pipes). The first delivery hose 62 and the second delivery hose 63 are both secured to the bottom of the railings with cable ties 64, and atomizing nozzles 65 are installed on the first delivery hose 62 and the second delivery hose 63. The atomizing nozzles 65 are arranged at an upward angle of 30 to 60 degrees, with alternating directions towards the tank body and towards the outside of the tank body.

[0030] A COD online monitor 91, an ammonia nitrogen online monitor 92, and a flow indicator transmitter 93 are installed on the wastewater inlet pipe 9 between the bar screen 7 and the primary sedimentation tank 8. The COD online monitor 91, ammonia nitrogen online monitor 92, and flow indicator transmitter 93 are connected to the local PLC, which is connected to the peristaltic pump. A first level sensor 44 is installed in the reagent storage tank 4, and a second level sensor 54 and a third level sensor 55 are installed in the mixing tank 5. The second level sensor 54 is a high-level sensor, and the third level sensor 55 is a low-level sensor. The first level sensor 44 is connected to the local PLC, which is connected to an alarm. The second level sensor 54 and the third level sensor 55 are connected to the local PLC, which is connected to the proportional pump 31.

[0031] The principle of this utility model is as follows:

[0032] During use, this invention can adjust the amount of deodorizing agent sprayed by atomizing according to the COD, ammonia nitrogen content and influent volume of the wastewater treatment plant, thereby playing a positive role in ensuring clean air in the plant area.

[0033] In the process of using this utility model, water from the inlet pipeline 1 is added to the storage tank 2. The water in the inlet pipeline 1 can come from the plant's recycled water. At this time, the main inlet control valve 11 is opened, and one of the two filters 12 is used. The control valves 13 on both sides of the filter 12 are opened, so the water in the inlet pipeline 1 can be filtered and then delivered to the storage tank 2. When the water level in the storage tank 2 is too high, the float valve 23 is closed, and the water supply is automatically stopped. After the filter 12 has been used for a period of time, the filter 12 can be switched and cleaned.

[0034] Based on the warnings from the on-site PLC, the on-site operators can monitor the amount of medicine in the medicine storage tank 4. During the process, when the liquid level of the medicine is lower than the first liquid level sensor 44, the warning device will sound an alarm, and the on-site operators will promptly add deodorant. In this utility model, the deodorant is a plant-based liquid deodorant, which is a commercially available and mature product.

[0035] Water in storage tank 2 and deodorant in chemical storage tank 4 are transported to mixing tank 5 via proportioning pump 31 at a certain ratio, such as a chemical-to-water ratio of 1:500. Proportioning pump 31 is a readily available and mature piece of equipment, so its details will not be elaborated further. The inlet 51 of mixing tank 5 is tangentially arranged, which facilitates thorough mixing of the deodorant and water. Therefore, no stirring equipment is required in mixing tank 5 to meet production needs. High and low level sensors in mixing tank 5 work in conjunction with proportioning pump 31 to ensure the chemical solution in mixing tank 5 remains within a certain range. The flow rate of proportioning pump 31 is adjustable, reaching up to 3m³ / h. 3 / h, there will be no situation where the supply to the backend is insufficient (generally, the amount of reagent solution used is 1-2m). 3 / sky).

[0036] The deodorizing agent prepared in the mixing tank 5 is metered and delivered to the bar screen 7 and the primary sedimentation tank 8 by a peristaltic pump, thereby achieving deodorization of the area around the bar screen 7 and the primary sedimentation tank 8. During the process, the delivery volume of the peristaltic pump can be adjusted according to the influent flow rate, influent COD and ammonia nitrogen content, so as to ensure the deodorization effect.

Claims

1. A mist-based deodorization system for the pretreatment section of a wastewater treatment plant, characterized in that: This includes the ingredient mixing system and the atomization system; The batching system includes a water storage tank, a reagent storage tank, and a batching tank. The water storage tank and the reagent storage tank are connected to the batching tank via a batching pipeline, and a proportioning pump is installed on the batching pipeline. The atomization system includes a delivery pipeline, the front end of which is connected to a reagent storage tank, and the rear end of which extends to the grit chamber and the primary sedimentation tank respectively. A delivery pump is installed on the delivery pipeline. Atomizing nozzles are arranged around the grit chamber and the primary sedimentation tank, and the rear end of the delivery pipeline is connected to each atomizing nozzle.

2. The sewage treatment plant pretreatment section mist deodorization system according to claim 1, characterized in that: The water storage tank is equipped with an inlet at the top, which is connected to an inlet pipeline. An inlet main control valve is installed on the inlet pipeline, and a filter is installed at the rear end of the inlet main control valve. Two filters are connected in parallel, with one in standby and one in use. Control valves are installed on the inlet pipelines on both sides before and after each filter. The inlet is connected to a float valve inside the water storage tank. A first vent is installed at the top of the water storage tank, and an outlet is installed at the bottom of the water storage tank, which is connected to a dispensing pipeline.

3. The sewage treatment plant pretreatment section mist deodorization system according to claim 1, characterized in that: The drug storage tank is equipped with a drug addition port on top, a second vent on top, and a drug outlet at the bottom, which is connected to the dispensing pipeline.

4. The misting deodorization system for the pretreatment section of a wastewater treatment plant according to claim 1, characterized in that: The mixing tank is provided with a feed inlet at the top, which is connected to the mixing pipeline. The feed inlet is arranged tangentially along the tank body. A third vent is provided at the top of the mixing tank, and a discharge outlet is provided at the bottom of the mixing tank, which is connected to the conveying pipeline.

5. The mist-based deodorization system for the pretreatment section of a wastewater treatment plant according to claim 1, characterized in that: The periphery of the bar screen is provided with a first conveying hose, and the periphery of the primary sedimentation tank is provided with a second conveying hose. The first and second conveying hoses are fixed according to the railings of the bar screen and the primary sedimentation tank, respectively. The first and second conveying hoses are respectively connected to the rear end of the conveying pipeline, and the atomizing nozzles are respectively arranged on the first and second conveying hoses.

6. The misting deodorization system for the pretreatment section of a wastewater treatment plant according to claim 1, characterized in that: The wastewater inlet pipeline between the bar screen and the primary sedimentation tank is equipped with an online COD monitor, an online ammonia nitrogen monitor, and a flow indicator transmitter. The online COD monitor, online ammonia nitrogen monitor, and flow indicator transmitter are all connected to a local PLC, which is connected to a peristaltic pump.

7. The misting deodorization system for the pretreatment section of a wastewater treatment plant according to claim 1, characterized in that: The pharmaceutical storage tank is equipped with a first liquid level sensor, which is a low-level sensor. The first liquid level sensor is connected to a field PLC, and the field PLC is connected to a field warning device.

8. The sewage treatment plant pretreatment section mist deodorization system according to claim 1, characterized in that: The mixing tank is equipped with a second liquid level sensor and a third liquid level sensor. The second liquid level sensor is a high-level sensor, and the third liquid level sensor is a low-level sensor. The second liquid level sensor and the third liquid level sensor are respectively connected to a field PLC, and the field PLC is connected to a proportional pump.

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