Waste gas treatment system for sewage reservoir

Abstract

The utility model discloses a waste gas treatment system for a sewage storage tank, which relates to the field of public health safety and comprises a closed aeration room arranged at the top of the sewage storage tank and a waste gas pipeline led out from the top of the closed aeration room, and a horizontal spray tower, a negative pressure fan and a discharge chimney are sequentially arranged on the waste gas pipeline along the flow direction. The horizontal spray tower is provided with a dosing device, and a PH value sensor and a residual chlorine sensor are arranged in the discharge chimney; the system further comprises a control unit, the signal input end of the control unit is electrically connected with the PH value sensor and the residual chlorine sensor, and the signal output end of the control unit is electrically connected with the negative pressure fan and the dosing device. According to the waste gas treatment device, waste gas escaping upwards from each sewage storage tank is collected and treated in a centralized manner, the waste gas is introduced into the horizontal spray tower through the negative pressure fan, liquid medicine is sprayed into the spray tower to sterilize and deodorize the passing gas, and the treated gas is discharged cleanly after reaching the standard.

Description

Technical Field

[0001] This utility model relates to the field of public health and safety, specifically to a waste gas treatment system for a hospital sewage storage tank. Background Technology

[0002] Hospitals, as the front line of disease treatment, often become areas with high concentrations of viruses. In particular, hospital sewage storage ponds require harmless and clean treatment of medical waste gas to prevent infection of residents inside and around the hospital, while also avoiding air pollution.

[0003] However, although hospital wastewater storage tanks were designed to be underground and covered with green vegetation for concealment during construction, the treated wastewater still ultimately flows through the city's main sewage network. This main sewage network is closely connected to the sewer systems of countless households, forming a complex drainage system. Against this backdrop, viruses, bacteria, and pollutants such as exhaust fumes can still be affected by atmospheric pressure, wind strength, and other factors, floating around and posing a potential threat to the environment and residents' health.

[0004] Therefore, there is a need to develop a waste gas treatment system with a simple structure that can collect, harmlessly and cleanly treat the waste gas generated from hospital sewage storage ponds. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the aforementioned background technology and provide a waste gas treatment system with a simple structure that can collect, harmlessly and cleanly treat the waste gas generated from hospital sewage storage tanks.

[0006] The technical solution of this utility model is as follows: a waste gas treatment system for a sewage storage tank, including a sealed aeration chamber set at the top of the sewage storage tank and a waste gas pipeline led out from the top of the sealed aeration chamber. A horizontal spray tower, a negative pressure fan, and an exhaust chimney are arranged sequentially along the flow direction on the waste gas pipeline. The horizontal spray tower is equipped with a dosing device for adding bactericidal liquid to the spray liquid. A pH sensor and a residual chlorine sensor are installed in the exhaust chimney.

[0007] It also includes a control unit, whose signal input terminal is electrically connected to a pH sensor and a residual chlorine sensor to monitor the quality of the outlet exhaust gas, and whose signal output terminal is electrically connected to a negative pressure fan to control the air volume and to a dosing device to control the dosage.

[0008] Preferably, the horizontal spray tower includes a shell and a spray zone and a packing zone disposed in the shell along the flow direction. The spray zone is provided with a nozzle and a spray inlet communicating with the nozzle, and the packing zone is provided with packing material.

[0009] Furthermore, the horizontal spray tower is provided with a recovery water tank on the outside. The recovery water tank is connected to the bottom of the shell to collect the liquid flowing out of the shell. The recovery water tank is provided with a circulation pump connected to the spray inlet to provide high-pressure spray liquid to the spray area.

[0010] Furthermore, the circulating pump is electrically connected to the signal output terminal of the control unit.

[0011] Furthermore, the housing is provided with a horizontal first perforated partition, and the spraying area and the filling area are formed by a second perforated partition vertically connecting to the top of the housing above the first perforated partition. A water collection area is formed below the first perforated partition and is connected to the recycling water tank.

[0012] Furthermore, the recycled water tank is equipped with an automatic water replenishment mechanism, which includes a water replenishment pipe connected to a water source and a first liquid level sensor installed inside the recycled water tank. The first liquid level sensor is electrically connected to the signal input terminal of the control unit, and a water replenishment valve is installed on the water replenishment pipe and electrically connected to the signal output terminal of the control unit for replenishing water to a preset liquid level.

[0013] Furthermore, the dosing device includes a medicine tank and a metering pump. The metering pump is connected to the spray inlet for adding bactericidal medicine to the spray solution. The metering pump is electrically connected to the signal output terminal of the control unit for controlling the dosage.

[0014] Furthermore, the medicine tank is equipped with a dosing mechanism, which includes a water inlet pipe connected to a water source and equipped with a valve, and a stirring motor installed on the top of the medicine tank. The stirring motor is driven by a stirring rod that extends into the medicine tank, and the end of the stirring rod is equipped with blades. The top of the medicine tank is equipped with an openable dosing port.

[0015] Furthermore, the filler is a hollow plastic ball.

[0016] Preferably, the exhaust stack includes a vertical exhaust stack and an exhaust cap disposed at the top of the vertical exhaust stack, and the pH sensor and residual chlorine sensor are disposed at the upper part of the vertical exhaust stack.

[0017] The beneficial effects of this utility model are as follows:

[0018] 1. In this invention, the sealed aeration chamber is a closed space built above the sewage storage tank to collect and centrally treat the exhaust gas escaping from the sewage storage tank, preventing the exhaust gas from spreading everywhere. The exhaust gas pipeline is made of PP material, which is corrosion-resistant and easy to clean. A negative pressure fan introduces the exhaust gas into a horizontal spray tower, where chemical solutions are sprayed to sterilize and deodorize the passing gas. After treatment to meet standards, the gas is discharged cleanly. This invention achieves effective treatment of exhaust gas from hospital sewage storage tanks, preventing the spread of bacteria caused by the escape of exhaust gas, and ensuring the normal operation of medical institutions and the safety of the living environment of surrounding residents.

[0019] 2. In this utility model, the control unit is electrically connected to the pH sensor and the residual chlorine sensor to monitor the quality of the discharged gas. When the data sensed by the pH sensor and the residual chlorine sensor deviates from the set range, the control unit controls the negative pressure fan to reduce its speed and reduce the air volume to increase the gas treatment time in the spray tower. At the same time, the control unit increases the dosage of the dosing device to further treat the waste gas until the data sensed by the pH sensor and the residual chlorine sensor meet the set range, thereby ensuring that the waste gas meets the emission standards.

[0020] 3. In this utility model, the horizontal spray tower is provided with a spray zone and a packing zone. The recovery water tank is connected to the spray inlet to provide high-pressure spray liquid, and the dosing device is connected to the spray inlet to provide bactericidal solution. Both are sprayed out from the nozzle and mixed with the exhaust gas. When the exhaust gas enters the packing zone, the packing material is a hollow plastic ball with a large porosity. The larger the specific surface area of ​​the packing material, the more uniform the gas-liquid distribution, the better the surface wetting performance, and the higher the mass transfer efficiency. The exhaust gas and the bactericidal components in the solution react fully in the packing zone to achieve deodorization and sterilization of the exhaust gas.

[0021] 4. In this utility model, a water collection area is formed below the first hollow partition inside the shell, and a spraying area and a filling area are formed above it by the second hollow partition. The hollow partition made of plastic is corrosion resistant and easy to clean, and the hollow structure facilitates the flow of exhaust gas and the collection of spray liquid at the bottom of the shell.

[0022] 5. In this utility model, the recycling water tank realizes the circulation of the spray liquid in the horizontal spray tower through the circulation pump. Since the exhaust gas will take away some water vapor, the volume of the circulating spray liquid will gradually decrease. The first liquid level sensor in the recycling water tank monitors the liquid level at all times. When the liquid level is lower than the preset liquid level, the control unit will control the water replenishment valve to automatically replenish water until the liquid level reaches the preset liquid level, thus realizing automatic water replenishment quickly and accurately.

[0023] 6. In this utility model, the dosing device includes a medicine tank and a metering pump. The medicine tank is used to store the prepared disinfectant solution. The control unit controls the dosage through the metering pump. When the exhaust gas index meets the set range, a certain set dosage is added. When the exhaust gas index does not meet the set range, the dosage is increased until the exhaust gas index meets the set range. The dosage can be quickly adjusted according to the actual situation.

[0024] 7. In this utility model, the medicine tank is equipped with a medicine dispensing mechanism. When dispensing medicine, water can be injected into the medicine tank through the water inlet pipe, and medicine powder and / or medicine liquid can be added through the medicine addition port. The stirring motor is started to mix the medicine solution evenly, which makes it convenient and quick to prepare medicine solution on the spot.

[0025] 8. In this utility model, the exhaust stack includes a vertical exhaust stack and an exhaust cap set at the top of the vertical exhaust stack. The pH sensor and the residual chlorine sensor are set at the upper part of the vertical exhaust stack, that is, the pH sensor and the residual chlorine sensor are set at the end of the entire waste gas treatment to realize the quality detection of the treated waste gas, so that the entire treatment system can be adjusted in real time according to the sensing value to ensure that the waste gas meets the standards before being discharged. Attached Figure Description

[0026] Figure 1 Schematic diagram of the waste gas treatment system for a wastewater storage tank

[0027] Figure 2 Schematic diagram of the water recycling tank and automatic water replenishment mechanism

[0028] Figure 3 Schematic diagram of the dosing device

[0029] Among them: 100-sewage storage tank; 200-exhaust gas pipeline; 1-closed aeration room; 2-horizontal spray tower (21-shell; 22-spraying area; 23-packing area; 24-spray head; 25-spraying inlet); 3-negative pressure fan; 4-exhaust chimney (41-vertical exhaust pipe; 42-exhaust cap); 5-recovery water tank (51-water replenishment pipe; 52-first liquid level sensor; 53-water replenishment valve); 6-circulation pump; 7-chemical tank (71-water inlet pipe; 72-mixing motor; 73-mixing rod; 74-blade; 75-dosing port; 76-second liquid level sensor); 8-metering pump; 9-pH sensor; 10-residual chlorine sensor. Detailed Implementation

[0030] The embodiments of this utility model are described in detail below, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0031] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] Example 1

[0034] like Figure 1 As shown, this utility model provides a wastewater storage tank exhaust gas treatment system, including a sealed aeration chamber 1 installed at the top of the wastewater storage tank 100 and an exhaust gas pipe 200 leading out from the top of the sealed aeration chamber 1. The exhaust gas pipe 200 is made of PP plastic, which is corrosion-resistant and easy to clean. A horizontal spray tower 2, a negative pressure fan 3, and an exhaust chimney 4 are sequentially arranged along the flow direction on the exhaust gas pipe 200. The horizontal spray tower 2 is equipped with a dosing device for adding bactericidal solution to the spray liquid. The exhaust chimney 4 is equipped with a pH sensor 9 and a residual chlorine sensor 10. The wastewater storage tank exhaust gas treatment system also includes a control unit; in this embodiment, the control unit is a PLC controller.

[0035] The control unit's signal input terminal is electrically connected to the pH sensor 9 and the residual chlorine sensor 10 to monitor the quality of the outlet exhaust gas. The control unit's signal output terminal is electrically connected to the negative pressure fan 3 to control the airflow based on the outlet exhaust gas quality, and electrically connected to the dosing device to control the dosage based on the outlet exhaust gas quality. In this embodiment, the flow direction is from front to back. Figure 1 The arrow on the exhaust gas duct 200 indicates the direction of exhaust gas flow.

[0036] The horizontal spray tower 2 has the following specific structure: it includes a shell 21 and a spray zone 22 and a packing zone 23 arranged along the flow direction within the shell 21. The upper part of the spray zone 22 is equipped with a nozzle 24 and a spray inlet 25 communicating with the nozzle 24. The packing zone 23 contains packing material. A horizontal first perforated partition 11 is provided inside the shell 21. Above the first perforated partition 11, a vertically connected second perforated partition 12 is provided. The upper end of the second perforated partition 12 is connected to the top of the shell 21, dividing the area above the first perforated partition 11 along the flow direction into the spray zone 22 and the packing zone 23. A water collection zone 26 is formed inside the shell 21 below the first perforated partition 11. In this embodiment, the packing material is hollow plastic spheres. Hollow plastic spheres are lightweight, corrosion-resistant, and have a large specific surface area, providing ample space for the contact and reaction between waste gas and chemicals, which helps improve mass transfer efficiency and achieve deodorization and sterilization of the waste gas.

[0037] A recovery water tank 5 is installed on the outside of the horizontal spray tower 2. The recovery water tank 5 is connected to the bottom of the shell 21 (water collection area 26) to collect the liquid flowing out of the shell 21. A circulation pump 6 is installed on the recovery water tank 5 and is connected to the spray inlet 25 to provide high-pressure spray liquid to the spray area 22. The circulation pump 6 is electrically connected to the signal output terminal of the control unit, so that the control unit can control the flow rate of the circulation pump 6 according to the actual situation. The recovery water tank 5 is equipped with an automatic water replenishment mechanism, such as... Figure 2 As shown, the automatic water replenishment mechanism has the following specific structure: it includes a water replenishment pipe 51 connected to a water source and a first liquid level sensor 52 installed in the recovery water tank 5. The liquid level sensor 52 is electrically connected to the signal input terminal of the control unit. The water replenishment pipe 51 leads to the recovery water tank 5, and a water replenishment valve 53 is installed on the water replenishment pipe 51 and electrically connected to the signal output terminal of the control unit for replenishing water to a preset liquid level. Since the exhaust gas will carry away some water vapor, the volume of the circulating spray liquid will gradually decrease. The control unit monitors the liquid level in the recovery water tank 5 in real time through the first liquid level sensor 52. When the first liquid level sensor 52 is lower than the preset liquid level, the control unit will control the water replenishment valve to automatically replenish water until the liquid level reaches the preset liquid level.

[0038] The specific structure of the dosing device is as follows: it includes a medicine tank 7 and a metering pump 8. The inlet of the metering pump 8 is connected to the medicine tank 7, and the outlet of the metering pump 8 is connected to the spray inlet 25 for adding bactericidal medicine to the spray solution. The metering pump 8 is electrically connected to the signal output terminal of the control unit for controlling the dosage. When the values ​​sensed by the pH sensor 9 and the residual chlorine sensor 10 meet the set range, the medicine is added at a fixed flow rate. When the values ​​sensed by the pH sensor 9 and the residual chlorine sensor 10 do not meet the set range, the control unit increases the flow rate of the metering pump 8 until the exhaust gas index meets the set range, and then the original dosage is restored.

[0039] Since the medicine is constantly being consumed, a dispensing mechanism can be installed on the medicine tank 7 to achieve on-site preparation of the medicine, such as... Figure 3As shown, the specific structure of the drug preparation mechanism is as follows: it includes a water inlet pipe 71 connected to a water source and equipped with a valve, and a stirring motor 72 installed on the top of the drug tank 7. The stirring motor 72 is driven by a stirring rod 73 that extends into the drug tank 7. A blade 74 is installed at the end of the stirring rod 73. The top of the drug tank 7 has an openable dosing port 75. The water inlet pipe 71 leads to the drug tank 7. During drug preparation, water can be injected into the drug tank 7 by manually opening the valve on the water pipe 71, and at the same time, drug powder and / or drug solution are added through the dosing port 75. The stirring motor 72 is then started to mix the drugs evenly.

[0040] The exhaust stack 4 includes a vertical exhaust stack 41 and an exhaust cap 42 located at the top of the vertical exhaust stack 41. A pH sensor 9 and a residual chlorine sensor 10 are located on the upper part of the vertical exhaust stack 41 (pH sensor 9 and residual chlorine sensor 10 are commonly used sensors in the field of waste gas treatment). The pH sensor 9 and residual chlorine sensor 10 are located at the end of the entire waste gas treatment process to monitor the quality of the treated waste gas. This allows the entire treatment system (negative pressure fan 3 and metering pump 8) to adjust in real time based on the sensor values, ensuring that the waste gas meets standards before being discharged. The exhaust stack 4 is ≥30 meters high, and the exhaust cap 42 protects the pH sensor 9 and residual chlorine sensor 10 from rainwater erosion.

[0041] The working principle of this utility model is as follows:

[0042] The enclosed aeration room 1 is a sealed space built above the sewage storage tank 100 to collect and centrally treat the exhaust gas escaping upwards from the sewage storage tank. The negative pressure fan 3 is started, introducing the exhaust gas into the horizontal spray tower 2. The nozzles 24 of the spray zone 22 spray high-pressure spray liquid and chemical solution, which are mixed with the exhaust gas and then enter the packing zone 23 for full reaction, thereby achieving deodorization and sterilization of the exhaust gas. The exhaust gas treated by the horizontal spray tower 2 enters the exhaust chimney 4 and is discharged into the atmosphere. The pH sensor 9 and the residual chlorine sensor 10 monitor the air quality at all times. When the data sensed by the pH sensor 9 and the residual chlorine sensor 10 deviates from the set normal range, the control unit controls the negative pressure fan 3 to reduce the speed and reduce the air volume to increase the treatment time of the gas in the spray tower 2. At the same time, the control unit increases the dosage of the metering pump 8 in the dosing device. If necessary, the flow rate of the circulating pump 6 can also be increased to further treat the exhaust gas until the data sensed by the pH sensor 9 and the residual chlorine sensor 10 meet the set range, the exhaust gas is discharged in compliance with the standard, and the speed of the negative pressure fan 3 and the dosage of the metering pump 8 return to their original values ​​under normal conditions.

[0043] Example 2

[0044] Except for the second liquid level sensor inside the medicine tank 7, this embodiment is the same as embodiment 1.

[0045] Because the liquid in the medicine tank 7 is constantly being consumed, a second liquid level sensor 76 is installed inside the medicine tank 7 and electrically connected to the signal input terminal of the control unit. When the liquid level in the medicine tank 7 drops to the preset level, the control unit will remind the staff to replenish the medicine through light and / or sound alarms. It can also send a message to the staff's mobile phone or email address via a network communication module connected to the control unit to further remind them to replenish the medicine. When preparing the medicine, the staff can manually open the valve to add water to the medicine tank 7, and simultaneously add the medicine powder and / or liquid through the medicine inlet 75. The stirring motor 72 will then be started to mix the medicine thoroughly.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Contents not described in detail herein are existing technology known to those skilled in the art. Those skilled in the art should understand that this utility model is not limited to the above embodiments; the embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A wastewater storage tank exhaust gas treatment system, characterized in that, It includes a closed aeration chamber (1) set on top of the sewage storage tank (100) and an exhaust gas pipe (200) led out from the top of the closed aeration chamber (1). The exhaust gas pipe (200) is provided with a horizontal spray tower (2), a negative pressure fan (3) and an exhaust chimney (4) in sequence along the flow direction. The horizontal spray tower (2) is provided with a dosing device for adding bactericidal liquid to the spray liquid. The exhaust chimney (4) is provided with a pH sensor (9) and a residual chlorine sensor (10). It also includes a control unit, whose signal input terminal is electrically connected to a pH sensor (9) and a residual chlorine sensor (10) for monitoring the quality of the exhaust gas at the outlet, and whose signal output terminal is electrically connected to a negative pressure fan (3) for controlling the air volume and to a dosing device for controlling the dosage.

2. The wastewater storage tank exhaust gas treatment system as described in claim 1, characterized in that, The horizontal spray tower (2) includes a shell (21) and a spray zone (22) and a packing zone (23) arranged in the shell (21) along the flow direction. The upper part of the spray zone (22) is provided with a nozzle (24) and a spray inlet (25) communicating with the nozzle (24). The packing zone (23) is provided with packing.

3. The wastewater storage tank exhaust gas treatment system as described in claim 2, characterized in that, The horizontal spray tower (2) is provided with a recovery water tank (5) on the outside. The recovery water tank (5) is connected to the bottom of the shell (21) to collect the liquid flowing out of the shell (21). The recovery water tank (5) is provided with a circulation pump (6) connected to the spray inlet (25) to provide high-pressure spray liquid to the spray area (22).

4. The wastewater storage tank exhaust gas treatment system as described in claim 3, characterized in that, The circulating pump (6) is electrically connected to the signal output terminal of the control unit.

5. The wastewater storage tank exhaust gas treatment system as described in claim 3, characterized in that, The housing (21) is provided with a horizontal first perforated partition (11). The spray area (22) and the filler area (23) are formed by a second perforated partition (12) vertically connected to the top of the housing (21) above the first perforated partition (11). A water collection area (26) is formed below the first perforated partition (11) and communicates with the recovery water tank (5).

6. The wastewater storage tank exhaust gas treatment system as described in claim 3, characterized in that, The recycling water tank (5) is equipped with an automatic water replenishment mechanism. The automatic water replenishment mechanism includes a water replenishment pipe (51) connected to the water source and a first liquid level sensor (52) installed in the recycling water tank (5). The first liquid level sensor (52) is electrically connected to the signal input terminal of the control unit. A water replenishment valve (53) is installed on the water replenishment pipe (51) and electrically connected to the signal output terminal of the control unit for replenishing water to a preset liquid level.

7. The wastewater storage tank exhaust gas treatment system as described in claim 2, characterized in that, The dosing device includes a medicine tank (7) and a metering pump (8). The metering pump (8) is connected to the spray inlet (25) for adding bactericidal medicine to the spray liquid. The metering pump (8) is electrically connected to the signal output terminal of the control unit for controlling the dosage.

8. The wastewater storage tank exhaust gas treatment system as described in claim 7, characterized in that, The medicine tank (7) is equipped with a dosing mechanism, which includes a water inlet pipe (71) connected to a water source and equipped with a valve, and a stirring motor (72) installed on the top of the medicine tank (7). The stirring motor (72) is driven by a stirring rod (73) that extends into the medicine tank (7). The end of the stirring rod (73) is equipped with a blade (74). The top of the medicine tank (7) is equipped with an openable dosing port (75).

9. The wastewater storage tank exhaust gas treatment system as described in claim 2, characterized in that, The filler is a hollow plastic ball.

10. The wastewater storage tank exhaust gas treatment system as described in claim 1, characterized in that, The exhaust stack (4) includes a vertical exhaust stack (41) and an exhaust cap (42) disposed on the top of the vertical exhaust stack (41). The pH sensor (9) and the residual chlorine sensor (10) are disposed on the upper part of the vertical exhaust stack (41).

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