Sewage plant deodorization collection system and method capable of adaptively adjusting air volume

Abstract

The invention discloses a sewage plant deodorization collection system and method capable of adjusting the air volume in a self-adaptive mode, the system comprises a first odor source, a biological deodorization filter tank and at least one second odor source, the first odor source comprises an inner inflow grating single body, and a main deodorization fan is arranged on a connecting pipeline between the second odor source and the biological deodorization filter tank; a first micromanometer is arranged on a connecting pipeline between the second odor source and the main deodorization fan, the inner inflow grating single body is connected to a pipeline between the first micromanometer and the main deodorization fan through an induced draft fan, and a second micromanometer is arranged on a connecting pipeline between the inner inflow grating single body and the induced draft fan. The liquid level difference serves as a feedforward signal, the problem of concentration sensing lag is fundamentally solved, enhanced collection can be rapidly started before or at the same time of generation of a large amount of odor, concentration feedback fine adjustment with protection is assisted, and unification of rapid response and accurate control is achieved.

Description

Technical Field

[0001] This application relates to the field of activated sludge aeration and deodorization technology, and in particular to a wastewater treatment plant deodorization and collection system and method with adaptive air volume adjustment. Background Technology

[0002] The airflow rate of the odor control system in a wastewater treatment plant needs to be adjusted according to changes in the operating conditions of the odor source. Odors are mainly dissolved in water and dissipate with water flow disturbances. Under steady conditions, the dissipation rate is constant; however, when local structures (such as internal inlet fine screens) activate online cleaning due to a level difference reaching the design value, or when fluctuations in the incoming water intensify water flow disturbances, the odor dissipation rate increases significantly, causing a sudden rise in the odor concentration collected in that area. If the system airflow remains constant, incomplete odor collection will occur, affecting the overall effectiveness.

[0003] While current deodorization systems in practical engineering can adjust the total air volume via frequency converters for the fans, the use of branched duct networks and the often fixed opening of valves in each branch duct after commissioning prevent them from dynamically responding to local air volume changes. When the total air volume changes, the air volume distribution ratio of each branch becomes unbalanced, leading to: 1) Areas with sudden changes in odor intensity cannot receive targeted airflow replenishment, resulting in decreased collection efficiency; 2) To cope with the worst operating conditions, the system is often designed based on the maximum air volume, resulting in excessive energy consumption during normal operation; 3) Adjusting the frequency of the main fan will disrupt the pressure balance of the pipeline network and cause airflow disturbances at other collection points.

[0004] Therefore, there is a need for a deodorization and collection technology and device that can automatically sense changes in local odor intensity, dynamically adjust the corresponding airflow, and maintain the overall pressure balance of the system. Directly using odor concentration sensing has a lag, and a composite control method with more timely response, more precise control, and stable operation is needed.

[0005] Existing technology CN218374336U discloses an adjustable airflow underground storage tank odor collection system, including a storage tank body, a square riser installed in the storage tank body, a buried main air duct connected to the square riser, and an odor treatment device connected to the buried main air duct for odor treatment. The odor treatment device is equipped with a fan, and collection ports are installed at the upper, middle, and lower levels of the square riser. The storage tank is equipped with an ultrasonic level gauge. This solution fails to solve the problems of being unable to adapt to changes in operating conditions, high energy consumption, system imbalance during airflow adjustment, and instability of a single control mode.

[0006] The prior art CN119269738B discloses a multi-point odor collection and monitoring method for a kitchen waste treatment facility. The steps include: establishing an emission point list YH in descending order of emission intensity; when ρi≥ρ0, adding the first emission point in the positive order of the emission point list YH to an adjustment list LH, and performing a first airflow enhancement step on the emission points in the adjustment list LH; during the time period ΔT1, increasing the airflow energy consumption of the emission point GZj in the adjustment list LH to the first energy consumption level. The average odor concentration ρi+1 of the waste storage area and the odor concentration DJi+1 of the emission point GZj are obtained at time Ti+1. When ρi+1≤ρ0, the emission point that was last added to the adjustment list LH is removed. When ρi+1≥ρi, all emission points in the emission point list YH are added to the adjustment list LH. If ρi+2≥ρ0, an exhaust abnormality alarm is triggered. If ρi+2<ρ0, the emission points in the emission point list YH are removed from the adjustment list LH in reverse order. This scheme fails to solve the problems of being unable to adapt to changes in operating conditions, high energy consumption, system imbalance during air volume adjustment, and instability of a single control mode.

[0007] In summary, neither of the two existing technologies mentioned above has solved the problems of being unable to adapt to changes in operating conditions, high energy consumption, system imbalance during air volume adjustment, and instability of a single control mode. Summary of the Invention

[0008] The purpose of this application is to solve the aforementioned technical problems.

[0009] To achieve the above objectives, the first aspect of this application proposes an adaptive airflow-adjustable odor collection system for a wastewater treatment plant, comprising a first odor source, a biological deodorization filter, and at least one second odor source. The first odor source includes an internal inlet bar screen unit. A main deodorizing fan is installed on the connecting pipeline between the second odor source and the biological deodorization filter. A first micro-manometer is installed on the connecting pipeline between the second odor source and the main deodorizing fan. The internal inlet bar screen unit is connected to the pipeline between the first micro-manometer and the main deodorizing fan via an induced draft fan. A second micro-manometer is installed on the connecting pipeline between the internal inlet bar screen unit and the induced draft fan.

[0010] Furthermore, a liquid level differential gauge is installed inside the internal flow grid unit to monitor the liquid level difference on both sides of the grid.

[0011] Furthermore, the wastewater treatment plant's deodorization collection system also includes a hydrogen sulfide detection device and an emission tower. The hydrogen sulfide detection device is installed in the pipeline connected to the internal inlet grid unit or near the collection hood, and the emission tower is connected to the biological deodorization filter via a pipeline.

[0012] To achieve the above objectives, a second aspect of this application proposes an adaptive airflow regulation method for odor collection in wastewater treatment plants, using the aforementioned wastewater treatment plant odor collection system, the method comprising: When the liquid level difference on both sides of the grid inside the internal inlet grid unit rises to the set high value, the induced draft fan is started and the frequency is increased, which causes the pressure value of the first micro gauge to decrease. When the main deodorizing fan receives a signal that the pressure value of the first micromanometer has decreased, it starts to increase the frequency of operation until the pressure value of the first micromanometer returns to the original set value. When the liquid level difference between the two sides of the internal inlet grid unit drops to the set low value, the induced draft fan stops running, causing the pressure value of the first micro gauge to increase. The main deodorizing fan receives a signal that the pressure value of the first micromanometer has increased and starts to operate at a reduced frequency until the pressure value of the first micromanometer returns to the original set value.

[0013] Furthermore, the process of starting the induced draft fan and increasing its frequency includes: obtaining the target operating frequency of the induced draft fan based on the liquid level difference, the pressure value of the second micro-manometer, and the hydrogen sulfide concentration, and starting the induced draft fan and increasing its frequency to the target operating frequency.

[0014] Furthermore, the target operating frequency of the induced draft fan, obtained based on the liquid level difference, the pressure value of the second micro-manometer, and the hydrogen sulfide concentration, includes: obtaining the base frequency based on the liquid level difference and the pressure value of the second micro-manometer, obtaining the frequency correction amount based on the hydrogen sulfide concentration, and obtaining the target operating frequency based on the base frequency and the frequency correction amount.

[0015] Furthermore, the frequency correction amount obtained based on the hydrogen sulfide concentration includes: if the actual measured value of the hydrogen sulfide concentration is greater than the value obtained by adding the preset target value and the dead zone value, then a frequency correction amount greater than 0 is obtained based on the actual measured value of the hydrogen sulfide concentration, the preset target value, and the dead zone value; otherwise, the frequency correction amount is 0, and the dead zone value is the protection range for the allowable fluctuation of the hydrogen sulfide concentration.

[0016] Furthermore, the process of obtaining the target operating frequency based on the base frequency and the frequency correction includes: after the frequency correction has been stable for 30 to 60 seconds, the target operating frequency is obtained based on the base frequency and the frequency correction, where the frequency correction has an upper limit.

[0017] Furthermore, the target operating frequency is obtained as follows:

[0018] in, This is the final target operating frequency of the induced draft fan, and this value is used as the setting value for the next start of the induced draft fan, in Hz; The fundamental frequency is calculated based on the liquid level difference and the pressure value of the second micromanometer, and the unit is Hz. This is the frequency correction calculated based on the deviation in hydrogen sulfide concentration, in Hz.

[0019] Furthermore, the obtained frequency correction is:

[0020] in, This is the frequency correction calculated based on the deviation in hydrogen sulfide concentration, in Hz. This is the concentration-frequency adjustment coefficient, calibrated based on the system's airflow-concentration response characteristics, with units of Hz / ppm; This is a real-time measurement of hydrogen sulfide concentration, in ppm. The preset target value for hydrogen sulfide concentration is the upper limit of the concentration that is expected to be maintained, in ppm; DB is the dead zone value, which is the protected range for the allowable fluctuation of hydrogen sulfide concentration, in ppm.

[0021] By applying the above-described technical solution of the present invention, at least the following technical effects are achieved: 1. This invention has a rapid response and precise deodorization. It uses the liquid level difference as a feedforward signal to fundamentally solve the problem of concentration sensing lag. It can quickly start enhanced collection before or at the same time as a large amount of odor is generated. It is further supplemented by concentration feedback fine-tuning with protection to achieve the unity of rapid response and precise control. 2. The system of the present invention operates with high stability. By maintaining a constant pressure in the main pipeline network (before the branch pipes are connected in the part with air volume changes), it ensures that the air volume distribution of the system does not become unbalanced with changes in air volume. 3. This invention is highly efficient and energy-saving, the equipment is durable, the main deodorizing fan is frequency-converted as needed, the induced draft fan operates with data and avoids ineffective adjustment and excessive suction, the overall system has high energy efficiency, and the intelligent algorithm significantly reduces the operating frequency of key equipment, extends service life and reduces maintenance costs; 4. The present invention has a clear structure, innovatively integrates feedforward, feedback and pressure balance control, and integrates intelligent protection strategies. It is easy to upgrade and transform existing systems and has significant practical and promotional value.

[0022] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0023] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 A schematic diagram of an adaptive airflow-adjusting deodorization and collection system for a wastewater treatment plant is shown as an embodiment.

[0024] Attached reference numerals: 1. Internal inlet grid unit; 2. Second odor source; 3. Biological deodorization filter; 4. Emission tower; 5. Main deodorization fan; 6. Exhaust fan; 7. First micro-manometer; 8. Second micro-manometer; 9. Liquid level differential gauge. Detailed Implementation

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] The present invention will be further described in detail below with reference to specific embodiments, which should not be construed as limiting the scope of protection claimed by the present invention.

[0027] Example 1

[0028] According to one aspect of the present invention, an adaptive airflow regulation system for odor collection in wastewater treatment plants is proposed, such as... Figure 1 As shown, the system includes a first odor source, a biological deodorization filter 3, and a second odor source 2. The first odor source includes an internal inlet grid unit 1. A main deodorizing fan 5 is installed on the connecting pipe between the second odor source 2 and the biological deodorization filter 3. A first micro-manometer 7 is installed on the connecting pipe between the second odor source 2 and the main deodorizing fan 5. The internal inlet grid unit 1 is connected to the pipe between the first micro-manometer 7 and the main deodorizing fan 5 via an induced draft fan 6. A second micro-manometer 8 is installed on the connecting pipe between the internal inlet grid unit 1 and the induced draft fan 6.

[0029] Furthermore, a liquid level differential gauge 9 is installed inside the internal flow grid unit 1, which is used to monitor the liquid level difference on both sides of the grid.

[0030] Furthermore, the wastewater treatment plant odor collection system also includes a hydrogen sulfide detection device and an emission tower 4. The hydrogen sulfide detection device is installed in the pipeline connected to the internal inlet grid unit 1 or near the collection hood. The emission tower 4 is connected to the biological deodorization filter 3 through a pipeline.

[0031] Specifically, in this embodiment, the following key components are added to the conventional biological deodorization system: Main deodorizing fan 5: Located at the beginning of the deodorizing main pipe, equipped with a frequency converter, used to transport odorous gas to the biological deodorizing filter 3 and regulate the total air volume; The collection branch pipe of the second odor source 2: the air valve of the collection point with relatively stable odor intensity (such as aeration tank or sedimentation tank) is fixed after adjustment. First micro pressure gauge 7: Installed on the main deodorization main pipe, located after other branch pipes merge and before the bar grid branch pipe merges, to monitor the static pressure of the main pipeline network and feed the signal back to the frequency converter of the main deodorization fan 5; Internal inlet grille unit 1: a key source of odor fluctuations, equipped with an automatic flushing program; Liquid level differential gauge 9: Installed across the front and rear of the grid, it monitors the liquid level difference and serves as the main trigger signal for feedforward control, which is then linked to the control system; Second micromanometer 8: Installed on the odor collection branch pipe of the grille to monitor the static pressure of the branch pipe; Exhaust fan 6 (dedicated variable frequency fan): installed on the deodorization branch pipe of the grille, used to independently increase the negative pressure of the branch pipe and increase the air volume at the grille point; Hydrogen sulfide detection device: installed in the pipeline connected to the internal inlet grid unit 1 or near the collection hood, used to monitor the odor concentration (represented by H2S) at this key point in real time, and its signal is output as feedback fine-tuning quantity to the frequency converter of the induced draft fan 6.

[0032] Example 2

[0033] According to another aspect of the present invention, a wastewater treatment plant odor collection method with adaptive airflow adjustment is proposed, comprising: When the liquid level difference on both sides of the grid inside the internal inlet grid unit 1 rises to the set high value, the induced draft fan 6 is started and the frequency is increased, so that the pressure value of the first micro pressure gauge 7 is reduced. When the main deodorizing fan 5 receives a signal that the pressure value of the first micromanometer 7 has decreased, it starts to increase the frequency until the pressure value of the first micromanometer 7 returns to the original set value. When the liquid level difference between the two sides of the grid inside the internal inlet grid unit 1 drops to the set low value, the induced draft fan 6 stops running, causing the pressure value of the first micro gauge 7 to increase. The main deodorizing fan 5 receives a signal that the pressure value of the first micromanometer 7 has increased, and starts to operate at a reduced frequency until the pressure value of the first micromanometer 7 returns to the original set value.

[0034] Specifically, in this embodiment, the wastewater treatment plant odor collection system adopts a collaborative control strategy that combines feedforward and feedback.

[0035] When the liquid level difference before and after the bar reaches the set high value, triggering the automatic flushing program, the control system simultaneously performs the following operations: 1) Quick start: The liquid level difference signal takes priority and directly triggers the dedicated induced draft fan 6 of the grille to start and increase the frequency to the set value, and maintains the operation at this frequency.

[0036] 2) Adjusting the negative pressure of the branch pipe: The second micro-manometer 8 monitors the negative pressure of the bar screen branch pipe in real time. The frequency of the induced draft fan 6 continues to increase until the absolute value of the negative pressure in the branch pipe reaches the preset enhanced collection setting value. At this time, the airflow through the bar screen increases significantly, effectively capturing the odor that is exacerbated during rinsing.

[0037] 3) Main system pressure compensation: Due to the sudden increase in air volume in the bar screen branch pipe, the absolute value of the negative pressure in the main deodorization pipe before the junction of the bar screen deodorization branch pipe will decrease (this invention differs from existing technologies that use the pressure at the end of the main pipe, but instead uses the pressure before the junction of the bar screen deodorization branch pipe to control the main deodorization fan 5). The first micro-manometer 7 detects this pressure change (the pressure value is lower than its set value).

[0038] 4) Adjusting the main fan: The main deodorizing fan 5 receives the signal from the first micromanometer 7 and automatically increases its frequency to increase the total air volume until the negative pressure value of the main pipe at the first micromanometer 7 returns to the original set value. This ensures that the negative pressure environment of the second odor source 2 collection branch pipe remains unchanged, and its air volume remains stable, unaffected by the reinforcement of the grille points.

[0039] At this point, the system reaches a balance in a new state with a larger total air volume: the air volume at the grille point increases, while the air volume at other points remains unchanged, ensuring the overall deodorization effect.

[0040] When the bar flushing is complete and the liquid level difference drops to the set low value: 1) Stop the induced draft fan 6: The induced draft fan 6 for the bar screen is stopped.

[0041] 2) Branch pipes return to normal pressure: The bar grid branch pipes rely solely on the negative pressure of the main pipe for collection, and the air volume drops.

[0042] 3) Main system pressure compensation: The reduced airflow in the bar grid branch pipes causes an increase in the absolute value of the negative pressure in the main deodorization pipe (before the bar grid branch pipes merge). The first micro-manometer 7 detects this pressure change (the pressure value is higher than its set value).

[0043] 4) Adjust the main fan: The main deodorizing fan 5 receives the signal and automatically reduces the frequency to reduce the total air volume until the pressure at the first micro-manometer 7 returns to the original set value.

[0044] The system returns to its initial equilibrium state, and the main deodorizing fan operates at a lower frequency to achieve energy savings.

[0045] By employing pressure sensing and frequency conversion linkage control, the system automatically ensures airflow distribution, preventing imbalances caused by changes in odor levels despite variations in airflow. The system includes independent enhanced collection subsystems for key locations where odor intensity fluctuates dramatically (such as grilles). Crucially, this system incorporates the liquid level difference of the internal inlet grille as a feedforward control signal. This liquid level difference directly indicates the degree of grille blockage and the impending flushing action. This signal triggers the start / stop and frequency increase of the induced draft fan. Compared to feedback methods that wait for odor concentration to rise before taking action, this response is more direct and rapid, enhancing collection capacity from the source. Simultaneously, the system maintains constant pressure in the main pipeline by adjusting the frequency of the main deodorizing fan, thus ensuring absolute stability in airflow distribution across other parts of the system while guaranteeing enhanced collection.

[0046] Furthermore, the process of starting the induced draft fan 6 and increasing its frequency includes: obtaining the target operating frequency of the induced draft fan 6 based on the liquid level difference, the pressure value of the second micro-manometer 8, and the hydrogen sulfide concentration, and starting the induced draft fan 6 and increasing its frequency to the target operating frequency.

[0047] Furthermore, the target operating frequency of the induced draft fan 6 is obtained based on the liquid level difference, the pressure value of the second micro-manometer 8, and the hydrogen sulfide concentration, including: obtaining the base frequency based on the liquid level difference and the pressure value of the second micro-manometer 8, obtaining the frequency correction amount based on the hydrogen sulfide concentration, and obtaining the target operating frequency based on the base frequency and the frequency correction amount.

[0048] Based on the feedforward operation of the induced draft fan 6, the H2S concentration feedback loop performs dynamic fine-tuning and protection.

[0049] Furthermore, the correction formula for the target operating frequency of the induced draft fan 6 is as follows:

[0050] in, This is the final target operating frequency of the induced draft fan, and this value is used as the setting value for the next start of the induced draft fan, in Hz; The fundamental frequency is calculated based on the liquid level difference and the pressure value of the second micromanometer 8, in Hz. This is the frequency correction calculated based on the deviation in hydrogen sulfide concentration, in Hz.

[0051] Furthermore, the obtained frequency correction is:

[0052] in, This is the frequency correction calculated based on the deviation in hydrogen sulfide concentration, in Hz. This is the concentration-frequency adjustment coefficient, calibrated based on the system's airflow-concentration response characteristics, with units of Hz / ppm; This is a real-time measurement of hydrogen sulfide concentration, in ppm. The preset target value for hydrogen sulfide concentration for the control system is the upper limit of the concentration to be maintained, in ppm; DB is the dead zone value or tolerance band, which is the protection range for the allowable fluctuation of hydrogen sulfide concentration, in ppm.

[0053] Furthermore, the frequency correction amount obtained based on the hydrogen sulfide concentration includes: if the actual measured value of the hydrogen sulfide concentration is greater than the value obtained by adding the preset target value and the dead zone value, then a frequency correction amount greater than 0 is obtained based on the actual measured value of the hydrogen sulfide concentration, the preset target value, and the dead zone value; otherwise, the frequency correction amount is 0, and the dead zone value is the protection range for the allowable fluctuation of the hydrogen sulfide concentration.

[0054] Furthermore, the process of obtaining the target operating frequency based on the base frequency and the frequency correction includes: after the frequency correction has been stable for 30 to 60 seconds, the target operating frequency is obtained based on the base frequency and the frequency correction, where the frequency correction has an upper limit.

[0055] "Continuously stable" means that the condition of a frequency correction greater than 0 remains true throughout the delay time (30-60 seconds), meaning the hydrogen sulfide concentration continues to exceed the limit. "Stable" means that the frequency correction does not frequently switch due to the hydrogen sulfide concentration signal momentarily jumping back into the dead zone, i.e., there is no jitter of "frequency correction sometimes present, sometimes zero." Furthermore, the value of the frequency correction is not completely constant during the delay time, because... ,like Fluctuating within a small range, There may be slight changes, but as long as it does not fall back to 0 (i.e., does not fall out of the trigger zone), it will still be considered "continuously stable".

[0056] Specifically, in this embodiment, the system is equipped with intelligent protection logic: 1) Dead Zone Protection: Set the dead zone value DB. Only when... Only when the concentration is considered to be significantly exceeded will frequency correction be initiated. When concentration fluctuations are located at When within the interval, To avoid responding to minor fluctuations.

[0057] 2) Adjusting the delay: After calculating the new delay... Afterwards, the correction amount must remain stable for a period exceeding the preset delay time Td (30-60 seconds) before an actual update is performed. It outputs data to suppress transient signal interference.

[0058] 3) Maximum correction limit: for Set upper limit value This prevents excessive commands from being output under abnormal circumstances, thus protecting equipment safety.

[0059] A hydrogen sulfide (H2S) detection device is installed in the variable odor section (such as inside the bar screen) and interlocked with the induced draft fan frequency converter to form a concentration feedback closed-loop control with intelligent protection mechanism. This loop serves as a precise supplement and fine-tuning to the feedforward control. By monitoring key odor concentration indicators in real time, the induced draft fan frequency is dynamically corrected, and protection algorithms such as dead zone value (tolerance band), adjustment delay, and maximum limit are introduced to effectively avoid frequent equipment operation caused by normal concentration fluctuations or signal noise. This closed loop works in conjunction with the pressure-based main control loop to form a triple collaborative control mechanism of "rapid feedforward (liquid level difference) start-up, fine feedback (concentration) correction, and global pressure balance," giving the system a comprehensive advantage of rapid response, precise control, and high operational stability.

[0060] By applying the above-described technical solution of the present invention, at least the following technical effects are achieved: 1. This invention has a rapid response and precise deodorization. It uses the liquid level difference as a feedforward signal to fundamentally solve the problem of concentration sensing lag. It can quickly start enhanced collection before or at the same time as a large amount of odor is generated. It is further supplemented by concentration feedback fine-tuning with protection to achieve the unity of rapid response and precise control. 2. The system of the present invention operates with high stability. By maintaining a constant pressure in the main pipeline network (before the branch pipes are connected in the part with air volume changes), it ensures that the air volume distribution of the system does not become unbalanced with changes in air volume. 3. This invention is highly efficient and energy-saving, the equipment is durable, the main deodorizing fan is frequency-converted as needed, the induced draft fan operates with data and avoids ineffective adjustment and excessive suction, the overall system has high energy efficiency, and the intelligent algorithm significantly reduces the operating frequency of key equipment, extends service life and reduces maintenance costs; 4. The present invention has a clear structure, innovatively integrates feedforward, feedback and pressure balance control, and integrates intelligent protection strategies. It is easy to upgrade and transform existing systems and has significant practical and promotional value.

[0061] The above are merely several specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0062] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0063] It should be noted that, in the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

Claims

1. A wastewater treatment plant odor collection system with adaptive airflow adjustment, characterized in that, The system includes a first odor source, a biological deodorization filter (3), and at least one second odor source (2). The first odor source includes an internal flow grid unit (1). A main deodorizing fan (5) is installed on the connecting pipe between the second odor source (2) and the biological deodorization filter (3). A first micro-manometer (7) is installed on the connecting pipe between the second odor source (2) and the main deodorizing fan (5). The internal flow grid unit (1) is connected to the pipe between the first micro-manometer (7) and the main deodorizing fan (5) via an induced draft fan (6). A second micro-manometer (8) is installed on the connecting pipe between the internal flow grid unit (1) and the induced draft fan (6).

2. The wastewater treatment plant odor collection system according to claim 1, characterized in that, The internal inlet grid unit (1) is equipped with a liquid level differential gauge (9), which is used to monitor the liquid level difference on both sides of the grid.

3. The wastewater treatment plant odor collection system according to claim 1, characterized in that, The wastewater treatment plant deodorization collection system also includes a hydrogen sulfide detection device and an emission tower (4). The hydrogen sulfide detection device is located in the pipeline connected to the internal inlet grid unit (1) or near the collection hood. The emission tower (4) is connected to the biological deodorization filter (3) through a pipeline.

4. A wastewater treatment plant odor collection method with adaptive airflow adjustment, characterized in that, Using the wastewater treatment plant odor collection system as described in any one of claims 1-3, the method comprises: When the liquid level difference between the two sides of the grid inside the internal inlet grid unit (1) rises to the set high value, the induced draft fan (6) is started and the frequency is increased, so that the pressure value of the first micro gauge (7) is reduced; The main deodorizing fan (5) receives a signal that the pressure value of the first micromanometer (7) has decreased and starts to increase the frequency until the pressure value of the first micromanometer (7) returns to the original set value. When the liquid level difference between the two sides of the grid in the internal inlet grid unit (1) drops to the set low value, the induced draft fan (6) stops running, causing the pressure value of the first micro gauge (7) to increase; The main deodorizing fan (5) receives a signal from the first micromanometer (7) indicating an increase in pressure value and begins to operate at a reduced frequency until the pressure value of the first micromanometer (7) returns to the original set value.

5. The wastewater treatment plant deodorization and collection method according to claim 4, characterized in that, The process of starting the induced draft fan (6) and increasing the frequency includes: The target operating frequency of the induced draft fan (6) is obtained based on the liquid level difference, the pressure value of the second micro-manometer (8) and the hydrogen sulfide concentration. The induced draft fan (6) is started and the frequency is increased to the target operating frequency.

6. The wastewater treatment plant odor collection method according to claim 5, characterized in that, The target operating frequency of the induced draft fan (6) obtained based on the liquid level difference, the pressure value of the second micro-manometer (8), and the hydrogen sulfide concentration includes: The base frequency is obtained based on the liquid level difference and the pressure value of the second micro-manometer (8), the frequency correction is obtained based on the hydrogen sulfide concentration, and the target operating frequency is obtained based on the base frequency and the frequency correction.

7. The wastewater treatment plant deodorization and collection method according to claim 6, characterized in that, The frequency correction amount obtained based on hydrogen sulfide concentration includes: If the actual measured value of hydrogen sulfide concentration is greater than the value obtained by adding the preset target value and the dead zone value, then a frequency correction amount greater than 0 is obtained based on the actual measured value of hydrogen sulfide concentration, the preset target value and the dead zone value; otherwise, the frequency correction amount is 0. The dead zone value is the protection range for the allowable fluctuation of hydrogen sulfide concentration.

8. The wastewater treatment plant deodorization and collection method according to claim 6, characterized in that, The process of obtaining the target operating frequency based on the base frequency and the frequency correction amount includes: After the frequency correction amount remains stable for 30 to 60 seconds, the target operating frequency is obtained based on the base frequency and the frequency correction amount, and the frequency correction amount has an upper limit.

9. The wastewater treatment plant deodorization and collection method according to claim 6, characterized in that, The target operating frequency obtained is: in, This is the final target operating frequency of the induced draft fan, and this value is used as the setting value for the next start of the induced draft fan, in Hz; The fundamental frequency is calculated based on the liquid level difference and the pressure value of the second micromanometer (8), in Hz. This is the frequency correction calculated based on the deviation in hydrogen sulfide concentration, in Hz.

10. The wastewater treatment plant deodorization and collection method according to claim 9, characterized in that, The obtained frequency correction is: in, This is the frequency correction calculated based on the deviation in hydrogen sulfide concentration, in Hz. This is the concentration-frequency adjustment coefficient, calibrated based on the system's airflow-concentration response characteristics, with units of Hz / ppm; This is a real-time measurement of hydrogen sulfide concentration, in ppm. The preset target value for hydrogen sulfide concentration is the upper limit of the concentration that is expected to be maintained, in ppm; DB is the dead zone value, which is the protected range for the allowable fluctuation of hydrogen sulfide concentration, in ppm.

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