PH value adjusting method, device and equipment for sewage treatment and storage medium

Abstract

The invention relates to a pH value adjusting method, device and equipment for sewage treatment and a storage medium, and is applied to the field of sewage treatment.The method comprises the steps that the initial pH value of sewage in a purification pond is detected and obtained, and the actual adding amount of lime powder is calculated according to the initial pH value; a material conveying unit in a material supply box is controlled to be started to convey the lime powder to a material mixing box until the difference value of the weight values detected by a weight detection unit reaches the actual adding amount; a first pump body is controlled to be started to pump clean water into the material mixing box; the mixing unit is controlled to be started to stir the mixed liquid of the clear water and the lime powder in the mixing box; and the electromagnetic valve is controlled to be opened to add the mixed liquid in the mixing box into the purification tank. The device has the technical effects that accurate and quantitative feeding of lime powder is realized, so that the adjusting effect of the pH value of sewage is improved.

Description

Technical Field

[0001] This application relates to the technical field of wastewater treatment, and in particular to a method, apparatus, equipment and storage medium for adjusting the pH of wastewater. Background Technology

[0002] In the wastewater treatment process, adjusting the acidity (pH value) of the wastewater is a key pretreatment step because it directly affects the efficiency and stability of subsequent treatment units. For example, when using the activated sludge process for biological treatment of wastewater, the acidity or alkalinity of the wastewater needs to be adjusted to a state suitable for the survival of microorganisms. Coagulation, sedimentation, oxidation-reduction and other processes also often need to be carried out stably at specific acidity or alkalinity.

[0003] When wastewater has a low pH (acidic), it is usually necessary to add alkaline substances for neutralization. Lime, as a cheap and efficient alkaline substance, is frequently used in the process of adjusting the pH of wastewater. The existing method of adding lime powder to wastewater treatment tanks to adjust the pH of wastewater is usually as follows: a large amount of lime powder slurry is prepared in advance in a storage tank. When it is necessary to use lime powder to neutralize the wastewater in the treatment tank, a certain amount of lime powder slurry is extracted from the storage tank and added to the wastewater treatment tank for pH neutralization.

[0004] However, the lime powder slurry stored in the storage tank in advance has the problem of easy sedimentation. That is, the concentration of the pre-prepared lime powder slurry will be unevenly distributed in the storage tank due to sedimentation, which may cause a certain deviation between the actual amount of lime added and the set amount, thereby affecting the adjustment effect of wastewater pH. Summary of the Invention

[0005] To help improve the accuracy of lime powder addition and enhance the pH adjustment effect of wastewater, this application provides a method, apparatus, equipment, and storage medium for pH adjustment in wastewater treatment.

[0006] In a first aspect, this application provides a method for adjusting the pH of wastewater treatment, employing the following technical solution: The method is based on a lime powder feeding device, which includes a feeding box and a mixing box located above a wastewater purification tank. The mixing box is located below the feeding box and is used to hold lime powder. The feeding box is equipped with a conveying unit for transporting the lime powder inside the feeding box to the mixing box. A weight detection unit for detecting the weight of the feeding box is located at the bottom of the feeding box. The mixing box is equipped with a mixing unit for stirring the contents of the mixing box. The mixing box is connected to a water source through a first pump body, and the bottom of the mixing box is connected to the purification tank through a feeding pipe. A solenoid valve for controlling the opening and closing of the feeding pipe is installed on the feeding pipe. The method includes: The initial pH of the wastewater inside the purification tank is detected and obtained, and the actual amount of lime powder to be added is calculated based on the initial pH. The material conveying unit in the control feeding box is started to transport lime powder to the mixing box until the difference between the weight values ​​detected by the weight detection unit and the actual amount added is reached. The first pump is started to draw clean water into the mixing tank; The mixing unit is activated to stir the mixture of water and lime powder in the mixing tank. The solenoid valve is opened to add the mixture from the mixing tank to the purification tank. In one specific implementation scheme, calculating the actual amount of lime powder to be added based on the initial pH includes: The standard addition amount of lime powder is calculated based on the initial pH of the wastewater. This standard addition amount corresponds to the amount of lime powder added to adjust the current wastewater pH to a preset standard pH range. The actual addition amount of lime powder is obtained by subtracting a preset adjustment value from the standard addition amount. After the control solenoid valve opens and the mixed liquid in the mixing tank is added to the purification tank, the process further includes: re-detecting and acquiring the neutral pH of the wastewater inside the purification tank, comparing the neutral pH with the standard pH range; if the neutral pH is less than the standard pH range, calculating the neutralization difference between the standard pH range and the neutral pH, recalculating the secondary addition amount of lime powder based on the neutralization difference, and adding lime powder to the purification tank again according to the secondary addition amount; if the neutral pH is within the standard pH range, the pH adjustment of the wastewater in the purification tank is deemed complete.

[0007] In one specific implementation scheme, the dispensing device further includes several sampling points set at different locations in the water purification tank; the detection and acquisition of the initial pH of the wastewater inside the purification tank includes: detecting and acquiring the initial pH of the wastewater at each sampling point, and setting the average value of the initial pH as the initial pH; the re-detection and acquisition of the neutral pH of the wastewater inside the purification tank, and comparing the neutral pH with a preset standard pH range includes: re-detecting and acquiring secondary samples of the wastewater at each sampling point. The pH value is determined, and the maximum and minimum values ​​among the secondary sample pH values ​​are identified. The pH range corresponding to the maximum and minimum values ​​among the secondary sample pH values ​​is set as the neutral pH value. The neutral pH value is compared with a preset standard pH range. If both the maximum and minimum values ​​of the neutral pH value are within the standard pH range, the neutral pH value is determined to be within the standard pH range. If the maximum value of the neutral pH value is less than the standard pH range, the neutral pH value is determined to be less than the standard pH range.

[0008] In a specific implementation scheme, setting the pH range corresponding to the maximum and minimum values ​​in the secondary sampling pH as the neutral pH includes: calculating the sampling difference between the maximum and minimum values ​​in the secondary sampling pH; if the sampling difference is less than a preset reasonable value, then setting the pH range corresponding to the maximum and minimum values ​​in the secondary sampling pH as the neutral pH; if the sampling difference is not less than the preset reasonable value, then determining that the uniformity of mixing between the wastewater and lime powder inside the purification tank is insufficient; controlling the stirring device inside the purification tank to start stirring the wastewater and then sampling the wastewater inside the purification tank again. In a specific implementation scheme, after the stirring device inside the control purification tank is activated to stir the sewage and the sewage inside the purification tank is sampled again, the method further includes: if after a preset number of stirring and sampling, the sampling difference is still not less than a preset reasonable value, then it is determined that there is a reaction blind zone inside the purification tank; the location information of the sampling points corresponding to the maximum and minimum values ​​of the acidity and alkalinity in the second sampling is found and determined; the location information is sent to the user terminal so that the reaction blind zone inside the purification tank can be processed according to the location information. In a specific implementation scheme, after determining that there is a reaction blind zone inside the purification tank, the method further includes: comparing the secondary sampling pH of the wastewater at each sampling point with the standard pH range; counting the number of qualified sampling points whose secondary sampling pH is within the standard pH range; and if the number of qualified sampling points is greater than the preset number of qualified points, then determining that the pH adjustment of the wastewater in the purification tank is complete. In one specific implementation scheme, the detection and acquisition of the initial sampling pH of wastewater at each sampling point includes: after sampling wastewater at the sampling point for a preset first time, sampling wastewater again for a preset second time; discarding the wastewater sampled at the first time, and setting the pH of the wastewater sampled at the second time as the initial sampling pH corresponding to the sampling point. Secondly, this application provides a pH adjustment device for wastewater treatment, employing the following technical solution: The device is based on a lime powder feeding device, which includes a feeding box and a mixing box located above the wastewater purification tank. The mixing box is located below the feeding box and is used to hold lime powder. The feeding box is equipped with a conveying unit for transporting the lime powder inside the feeding box to the mixing box. A weight detection unit for detecting the weight of the feeding box is located at the bottom of the feeding box. The mixing box is equipped with a mixing unit for stirring the contents of the mixing box. The mixing box is connected to a water source through a first pump body. The bottom of the mixing box is connected to the purification tank through a feeding pipe. A solenoid valve for controlling the opening and closing of the feeding pipe is installed on the feeding pipe. The device includes: a lime powder calculation module for detecting and obtaining the initial pH of the wastewater inside the purification tank, and calculating the actual amount of lime powder to be added based on the initial pH; a lime powder addition module for controlling the material conveying unit in the feeding box to start and transport lime powder to the mixing box until the difference between the weight values ​​detected by the weight detection unit and the actual amount to be added; a clean water addition module for controlling the first pump to start and pump clean water into the mixing box; a mixed liquid stirring module for controlling the mixing unit to start and stir the mixture of clean water and lime powder in the mixing box; and a mixed liquid dispensing module for controlling the solenoid valve to open and add the mixed liquid in the mixing box to the purification tank. Thirdly, this application provides a computer device that adopts the following technical solution: it includes a memory and a processor, wherein the memory stores a computer program that can be loaded by the processor and executed as any of the above-mentioned acid-base adjustment methods for wastewater treatment.

[0009] Fourthly, this application provides a computer-readable storage medium, which adopts the following technical solution: storing a computer program that can be loaded by a processor and executed any of the above-mentioned acid-base adjustment methods for wastewater treatment.

[0010] In summary, this application has at least the following beneficial technical effects: 1. The actual amount of lime powder to be added is calculated in real time based on the pH of the wastewater in the purification tank. The lime powder is then precisely added using a feeding box, and then quantitatively added into the purification tank in real time using a mixing box. This method avoids the possibility of uneven distribution of the concentration of the pre-prepared lime powder slurry in the storage tank due to sedimentation, which could lead to a deviation between the actual amount of lime added and the target amount. This method achieves precise quantitative addition of lime powder, thereby improving the effect of regulating the pH of the wastewater. 2. The lime powder is added in stages. The amount of lime powder added is reduced in advance when it is added for the first time. Then, according to the change of the acidity and alkalinity of the wastewater after the first addition, the lime powder is added again. This reduces the possibility of excessive addition of lime powder leading to excessive adjustment of the acidity and alkalinity of the wastewater, thereby further improving the acidity and alkalinity adjustment effect of the wastewater. 3. This application's solution can use the sampling results from sampling points set at different locations in the purification tank to infer the acid-base reaction blind zones inside the purification tank and promptly feed back the location information of the reaction blind zones to the staff's user terminal. After obtaining this information, the staff can optimize the internal structure of the purification tank accordingly, eliminate the acid-base reaction blind zones inside the sewage tank, and thus further improve the effect of acid-base neutralization and regulation. 4. The wastewater extracted immediately serves to flush the wall of the sampling tube. A small amount of liquid remaining on the wall of the sampling tube can be washed away by the wastewater extracted immediately, thereby reducing the possibility that the residual medicine from the previous sampling may affect the results of the next sampling. This further improves the accuracy of the sampling results and the effect of adjusting the pH of the wastewater. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the lime powder feeding device in the embodiments of this application.

[0012] Figure 2 This is a flowchart of a method for adjusting the pH of wastewater in an embodiment of this application.

[0013] Figure 3 This is a structural block diagram of the pH adjustment device for wastewater treatment in the embodiments of this application.

[0014] Attached reference numerals: 1. Wastewater purification tank; 2. Feeding box; 3. Mixing box; 4. Conveying unit; 5. Weight detection unit; 6. Mixing unit; 7. First pump body; 8. Feeding pipe; 9. Solenoid valve; 301. Lime powder calculation module; 302. Lime powder addition module; 303. Clean water addition module; 304. Mixed liquid stirring module; 305. Mixed liquid dispensing module. Detailed Implementation

[0015] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0016] This application discloses a method for adjusting the pH of wastewater.

[0017] Reference Figure 1 This method is based on a lime powder feeding device, which includes a feeding box 2 and a mixing box 3 installed above the sewage purification tank 1. Specifically, the mixing box 3 can be installed below the feeding box 2. The feeding box 2 is used to hold lime powder, and workers can pre-store a large amount of lime powder in the feeding box 2. The feeding box 2 is equipped with a conveying unit 4 for conveying the lime powder inside the feeding box 2 to the mixing box 3. The conveying unit 4 can be a material conveying mechanism such as a screw conveyor or a belt conveyor. The discharge port of the material conveying mechanism extends into the mixing box 3. Since the mixing box 3 is located below the feeding box 2, the lime powder conveyed out of the feeding box 2 by the material conveying mechanism will fall into the mixing box 3 under the action of gravity.

[0018] Reference Figure 1A weight detection unit 5 is installed at the bottom of the feeding box 2 to detect the weight of the feeding box 2. The weight detection unit 5 can be an electronic scale, and the feeding box 2 can be mounted on the electronic scale. When lime powder is conveyed out of the feeding box 2, the detection value of the weight detection unit 5 decreases accordingly, and the decrease in the detection value of the weight detection unit 5 is the weight of the added lime powder. A mixing unit 6 is also installed inside the mixing box 3 to stir the inside of the mixing box 3. The mixing unit 6 can be a stirring rod installed inside the mixing box 3. In addition, the mixing box 3 is connected to a water source through the first pump body 7. The bottom of the mixing box 3 is connected to a feeding pipe 8. The feeding pipe 8 is set in a vertical direction and the end away from the mixing box 3 extends to the top of the purification tank and connects to the purification tank. A solenoid valve 9 is installed on the feeding pipe 8 to control the opening and closing of the feeding pipe 8. Therefore, when the solenoid valve 9 is in the open state, the mixture in the mixing box 3 can flow into the purification tank along the feeding pipe 8 under the action of gravity.

[0019] Reference Figure 2 The method includes the following steps: S10, detect and obtain the initial pH of the wastewater inside the purification tank, and calculate the actual amount of lime powder to be added based on the initial pH.

[0020] Specifically, before adjusting the pH of the wastewater inside the purification tank, the initial pH of the wastewater is first determined using pH testing equipment. Then, the actual amount of lime powder to be added is calculated based on the initial pH. The relationship between the initial pH of the wastewater and the amount of lime powder to be added can be pre-entered into a reference table by staff based on experimental data or historical experience. The actual amount of lime powder to be added can then be quickly calculated based on the entered reference table.

[0021] S20, control the material conveying unit in the feeding box to start conveying lime powder to the mixing box until the difference between the weight value detected by the weight detection unit and the actual amount added.

[0022] Specifically, the calculated actual amount of lime powder to be added is the weight of lime powder that needs to be added. When the conveying unit starts, it can continuously transport the lime powder stored in the feeding box to the mixing box. During this process, the difference in weight value detected by the weight detection unit is the mass of lime powder transported from the feeding box to the mixing box. When the weight loss of lime powder in the feeding box reaches the actual amount of lime powder to be added, the conveying unit is controlled to stop, thereby achieving the effect of accurately transporting a certain amount of lime powder to the mixing box.

[0023] S30, control the first pump to start and pump clean water into the mixing tank.

[0024] Specifically, the first pump can be started during the lime powder conveying process, that is, at the same time as the conveying unit starts, or after the conveying unit stops, that is, after the lime powder conveying is completed. The start time of the first pump can be set to a fixed time, that is, to extract a fixed amount of clean water and add it to the mixing tank, or the amount of clean water extracted can be dynamically adjusted according to the actual amount of lime powder added. In this embodiment, the example is that the first pump is started after the lime powder conveying is completed and a fixed amount of clean water is added.

[0025] S40, control the start of the mixing unit to stir the mixture of water and lime powder in the mixing tank.

[0026] Specifically, after both water and lime powder are added to the mixing tank, the mixing unit is started for a preset time to stir, so that the water and lime powder in the mixing tank can be mixed.

[0027] S50 controls the solenoid valve to open and add the mixture in the mixing tank to the purification tank.

[0028] Specifically, after the mixing unit finishes stirring, the solenoid valve opens. At this time, the mixture in the mixing tank flows along the feed pipe into the purification tank under the action of gravity, thus completing the quantitative addition of lime powder. Furthermore, while the solenoid valve is open to add the mixture from the mixing tank to the purification tank, the mixing unit can be restarted to stir the mixture of water and lime powder in the mixing tank. This ensures that the water and mixture are continuously added while in a flowing state, reducing the possibility of lime powder residue in the mixing tank and further improving the lime powder addition effect.

[0029] The technical solution of this application, when using lime powder to adjust the pH of wastewater, calculates the actual amount of lime powder to be added in real time based on the actual pH of the wastewater. Then, it precisely adds lime powder to the mixing tank using a feeding box, pumps clean water into the mixing tank, and starts the mixing unit to mix the lime powder and clean water evenly. Finally, it opens the solenoid valve to release the mixture from the mixing tank into the purification tank, thus completing the precise addition of lime powder during wastewater pH adjustment. This avoids the possibility of discrepancies between the actual and target amounts of lime powder added due to uneven distribution of the pre-prepared lime powder slurry in the storage tank caused by sedimentation in related technologies. This achieves precise quantitative addition of lime powder, thereby improving the pH adjustment effect of wastewater.

[0030] It should be noted that in the technical solution of this application, the main function of the feeding box is to accurately deliver a quantitative amount of lime powder into the mixing box, and the main function of the mixing box is to transport the lime powder to the purification tank. Therefore, the purpose of adding water and stirring in the mixing box is mainly to transport the lime powder in the mixing box to the purification tank. That is, regardless of whether the lime powder and water in the mixing box are evenly mixed, it does not affect the actual amount of lime powder added to the purification tank. This is fundamentally different from the situation in related technologies where the actual amount of lime powder added is deviated due to the uneven concentration of the pre-prepared lime slurry.

[0031] In one embodiment, considering that adding too much lime powder may lead to over-adjustment of the wastewater's pH level, the step of calculating the actual amount of lime powder to be added based on the initial pH level can be specifically performed as follows: First, the standard amount of lime powder to be added is calculated based on the initial pH of the wastewater actually detected. The standard amount of lime powder to be added is the amount that corresponds to adjusting the current pH of the wastewater to the preset standard pH range. Then, the preset adjustment value is subtracted from the standard amount of lime powder to set the adjusted amount of lime powder to be added. Then, lime powder is added quantitatively to the purification tank according to the actual amount of lime powder to be added. At this time, the amount of lime powder actually added to the purification tank is less than the standard amount of lime powder to be added.

[0032] Based on this, after controlling the solenoid valve to open and add the mixture from the mixing tank to the purification tank, the following steps can be performed: The neutral pH of the wastewater inside the purification tank is tested again and compared with the standard pH range. If the neutral pH is within the standard pH range, the pH adjustment of the wastewater in the purification tank is considered complete. If the neutral pH is less than the standard pH range, the difference between the standard pH range and the neutral pH is calculated. Then, the amount of lime powder to be added a second time is recalculated based on the difference, and lime powder is added to the purification tank again according to the second addition amount. This segmented addition of lime powder, with the initial addition amount reduced in advance, and the subsequent addition of lime powder based on the pH change of the wastewater after the initial addition, reduces the possibility of excessive lime powder addition leading to over-adjustment of the wastewater pH, thereby further improving the pH adjustment effect.

[0033] It should be noted that because the amount of lime powder added initially is reduced, the pH of the wastewater in the purification tank after the initial adjustment should theoretically be below the standard pH range, or just at the minimum value of the standard pH range. If the detected pH of the wastewater is higher than the standard pH range, it is highly likely that there is a significant abnormality in the pH detection or adjustment process. In this case, a notification message related to the significantly abnormal pH of the wastewater after the initial addition of lime powder can be sent to the staff's mobile phone or computer to prompt them to promptly investigate and repair the abnormality.

[0034] In one embodiment, to reduce sampling errors when detecting the pH of wastewater, the dispensing device further includes several sampling points located at different positions inside the purification tank. Each sampling point is numbered and its location within the purification tank is recorded. This location information includes the sampling point number and its specific position within the purification tank. Furthermore, the sampling end of each sampling point can be configured to include a sampling tube extending into the purification tank, through which wastewater at the sampling point is extracted to complete the wastewater sampling. The aforementioned step of detecting and obtaining the initial pH of the wastewater inside the purification tank can be specifically performed as follows: The initial sampling pH of the wastewater at each sampling point was detected and obtained, and then the average value of several initial sampling pH values ​​was set as the initial pH. The above-mentioned steps of re-detecting and obtaining the neutralized pH of the wastewater inside the purification tank, and comparing the neutralized pH with the preset standard pH range, can be specifically performed as follows: The pH of the wastewater at each sampling point was measured again, and the maximum and minimum values ​​among several secondary sampling pH values ​​were determined. Then, the pH range corresponding to the maximum and minimum values ​​of the secondary sampling pH values ​​was set as the neutral pH. At this point, the detected neutral pH of the wastewater is actually a range value, which more accurately reflects the actual pH of the wastewater inside the purification tank. The neutral pH is then compared with the preset standard pH range. If the maximum and minimum values ​​of the neutral pH are... If all pH values ​​are within the standard pH range, then the neutralized pH is determined to be within the standard pH range, meaning that the pH of the wastewater at different locations within the purification tank has reached the standard pH range, and the wastewater pH adjustment is complete. If the maximum value of the neutralized pH is less than the standard pH range, meaning that after the initial addition of lime powder, the pH of all the wastewater in the purification tank is still generally lower than the standard pH range, then the neutralized pH is determined to be less than the standard pH range, and lime powder is subsequently added to the purification tank for secondary adjustment.

[0035] When conducting the initial pH test on the wastewater in the purification tank and the second pH test after the initial adjustment, multiple sampling points were used to sample the wastewater in the purification tank. This reduced the sampling error caused by single-point sampling, thereby further improving the accuracy and effect of wastewater pH adjustment.

[0036] In one embodiment, to further reduce the possibility of sampling errors when detecting the pH of wastewater due to uneven mixing of wastewater and lime powder in the purification tank, the step of setting the pH range corresponding to the maximum and minimum values ​​in the secondary sampling as the neutral pH range can be specifically performed as follows: First, the sampling difference between the maximum and minimum values ​​of the pH in the two samplings is calculated. If the sampling difference is less than the preset reasonable value, it indicates that the difference in pH between different areas of the wastewater in the purification tank is small, meaning that the wastewater in different locations in the purification tank has reacted fully with the lime powder and mixed evenly. Then, the pH range corresponding to the maximum and minimum values ​​in the two samplings is set as the neutral pH. If the sampling difference is not less than the preset reasonable value, it indicates that the difference in pH between different areas of the wastewater in the purification tank is large, meaning that there may be areas in the purification tank that have not reacted fully with the lime powder. Then, it is determined that the uniformity of mixing between the wastewater and the lime powder in the purification tank is insufficient. After that, the stirring device inside the purification tank is started to stir the wastewater, and the wastewater inside the purification tank is sampled again. The stirring device inside the purification tank can be a stirring rod or other stirring equipment pre-installed inside the purification tank. Therefore, by analyzing and calculating the sampling results from multiple sampling points, the reaction status and mixing uniformity between the sewage and lime powder inside the purification tank can be intuitively obtained through the difference between the sampling points. Then, when the mixing uniformity between the sewage and lime powder inside the purification tank is insufficient, the stirring device inside the purification tank can be started in time to stir the sewage again. This further reduces the possibility of sampling errors when detecting the acidity and alkalinity of the sewage due to uneven mixing of the sewage and lime powder inside the purification tank, and further improves the accuracy and effect of sewage acidity adjustment.

[0037] In one embodiment, after the step of activating the stirring device inside the purification tank to stir the wastewater and then sampling the wastewater inside the purification tank again, the following steps may also be performed: If, after a preset number of stirring and sampling cycles, the difference in wastewater pH detected at each sampling point is still not less than a preset reasonable value, it is determined that a reaction blind zone exists within the purification tank. This reaction blind zone refers to an area within the purification tank that is difficult for lime powder to reach. Subsequently, the location information of the sampling points corresponding to the maximum and minimum pH values ​​from the secondary sampling is located and determined. The detection values ​​of the maximum and minimum pH values ​​from the secondary sampling, along with the corresponding sampling point location information, are then sent to the staff's user terminal so that staff can address the reaction blind zone within the purification tank based on the location information. For example, if the feedback received by the staff indicates that the wastewater pH corresponding to the minimum value is significantly abnormal, and the pH of the wastewater area corresponding to this sampling point shows no change or a significantly small change after the initial addition of lime powder and multiple stirring cycles, it indicates that the flowability at this point within the wastewater tank may be abnormal. The staff can then take corresponding measures at this point, such as adding a diversion plate or adjusting the stirring direction within the purification tank.

[0038] This application's solution can use sampling results from sampling points set at different locations within the purification tank to infer the acid-base reaction blind zones inside the tank and promptly feed back the location information of these blind zones to the staff's user terminal. After obtaining this information, the staff can optimize the internal structure of the purification tank accordingly, eliminate the acid-base reaction blind zones inside the wastewater tank, and thus further improve the acid-base neutralization and regulation effect.

[0039] In one embodiment, to help improve the efficiency of wastewater pH adjustment in the purification tank, after determining the existence of a reaction blind zone inside the purification tank, the following steps may be specifically performed: First, the secondary sampling pH of wastewater at each sampling point is compared with the standard pH range. Then, the number of qualified sampling points whose secondary sampling pH falls within the standard pH range is counted. Next, the number of qualified sampling points is compared with a preset number of qualified sampling points. The preset number of qualified sampling points can be set based on the number of sampling points. In this embodiment, the qualified number is taken as the number of sampling points minus two. That is, if the number of sampling points is 10, the qualified number is set to 8. If the number of qualified sampling points is not greater than the preset qualified number, it indicates... If the wastewater in the purification tank still has many areas where the pH level is not up to standard, the process of adjusting the wastewater pH level will be stopped and feedback will be sent to the user terminal of the staff, who will then be notified to come and repair it in time. If the number of qualified sampling points is greater than the preset number of qualified points, it means that the pH level of most areas of the wastewater in the purification tank has reached the qualified standard. At this point, the pH level adjustment of the wastewater in the purification tank is considered to be complete. This reduces the possibility of the entire wastewater pH level adjustment process being interrupted due to abnormal detection at individual sampling points, thereby further improving the efficiency of wastewater pH level adjustment.

[0040] In one embodiment, to reduce the possibility that residual drug solution from the previous sampling may remain on the wall of the sampling tube and affect the results of subsequent samplings, the step of detecting and obtaining the initial sampling pH of wastewater at each sampling point can be specifically performed as follows: First, wastewater is sampled at a predetermined first sampling time at the sampling point. This first-time sample is then discarded, either by returning the sampled wastewater to the purification tank. Next, wastewater is sampled again at a predetermined second sampling time. The pH of this second-time sample is then set to the pH of the initial sample at the corresponding sampling point. The wastewater sampled at the first sampling time effectively flushes the walls of the sampling tube, removing any residual liquid. This reduces the possibility of residual medication from the previous sampling affecting subsequent sampling results, further improving the accuracy of the sampling results and the effectiveness of wastewater pH adjustment. Furthermore, when testing the neutral pH of the wastewater inside the purification tank again after adding lime powder, the above-mentioned segmented water sampling method can be used to rinse the sampling tube to sample the wastewater. That is, each time the wastewater in the purification tank is sampled, the sampling tube can be rinsed first, and then the pH of the sampled liquid can be tested to reduce sampling errors. This will not be elaborated further here.

[0041] Figure 2 This is a schematic flowchart of a method for adjusting the pH of wastewater in one embodiment. It should be understood that, although... Figure 2 The steps in the flowchart are shown sequentially as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows; unless explicitly stated otherwise, there is no strict order requirement for the execution of these steps, and they can be executed in other orders; and Figure 2 At least some of the steps in the process may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least some of the sub-steps or stages of other steps.

[0042] Based on the above method, this application also discloses an acidity / alkalinity adjustment device for wastewater treatment.

[0043] like Figure 3As shown, the device is based on a lime powder feeding equipment. The feeding equipment includes a feeding box and a mixing box located above the wastewater purification tank. The mixing box is located below the feeding box and is used to hold lime powder. Inside the feeding box is a conveying unit for transporting the lime powder to the mixing box. At the bottom of the feeding box is a weight detection unit for detecting the weight of the feeding box. Inside the mixing box is a mixing unit for stirring the contents. The mixing box is connected to a water source via a first pump. The bottom of the mixing box is connected to the purification tank via a feeding pipe, which is equipped with a solenoid valve for controlling the on / off state of the feeding pipe. The device includes the following modules: The lime powder calculation module 301 is used to detect and obtain the initial pH of the sewage inside the purification tank, and calculate the actual amount of lime powder to be added based on the initial pH. The lime powder addition module 302 is used to control the material conveying unit in the feeding box to start conveying lime powder to the mixing box until the difference between the weight values ​​detected by the weight detection unit reaches the actual addition amount. The clean water addition module 303 is used to control the start of the first pump body to draw clean water into the mixing tank; The mixing module 304 is used to control the start of the mixing unit to stir the mixture of water and lime powder in the mixing tank; The mixing liquid dispensing module 305 is used to control the solenoid valve to open and add the mixing liquid in the mixing tank to the purification tank.

[0044] In one embodiment, the lime powder calculation module 301 is further configured to calculate the standard addition amount of lime powder based on the initial pH of the wastewater. The standard addition amount is the amount of lime powder added to adjust the current pH of the wastewater to a preset standard pH range. The actual addition amount of lime powder is obtained by subtracting the preset adjustment value from the standard addition amount. After the control solenoid valve is opened to add the mixed liquid in the mixing tank to the purification tank, the module further includes: detecting and obtaining the neutral pH of the wastewater inside the purification tank again, comparing the neutral pH with the standard pH range; if the neutral pH is less than the standard pH range, calculating the neutralization difference between the standard pH range and the neutral pH, recalculating the secondary addition amount of lime powder based on the neutralization difference, and adding lime powder to the purification tank again according to the secondary addition amount; if the neutral pH is within the standard pH range, determining that the pH adjustment of the wastewater in the purification tank is complete.

[0045] In one embodiment, the dosing device further includes several sampling points set at different locations in the water purification tank; the lime powder calculation module 301 is also used to detect and obtain the initial sampling pH of the wastewater at each sampling point, and set the average value of the initial sampling pH as the initial pH; to detect and obtain the neutral pH of the wastewater inside the purification tank again, and to compare the neutral pH with the preset standard pH range, including: detecting and obtaining the secondary sampling pH of the wastewater at each sampling point again, and determining the maximum and minimum values ​​among the secondary sampling pH; setting the pH range corresponding to the maximum and minimum values ​​among the secondary sampling pH as the neutral pH; comparing the neutral pH with the preset standard pH range; if the maximum and minimum values ​​of the neutral pH are both within the standard pH range, then the neutral pH is determined to be within the standard pH range; if the maximum value of the neutral pH is less than the standard pH range, then the neutral pH is determined to be less than the standard pH range.

[0046] In one embodiment, the lime powder calculation module 301 is further used to calculate the sampling difference between the maximum and minimum values ​​of the secondary sampling pH. If the sampling difference is less than a preset reasonable value, the pH range corresponding to the maximum and minimum values ​​of the secondary sampling pH is set to neutral pH. If the sampling difference is not less than the preset reasonable value, it is determined that the uniformity of the mixing between the sewage and lime powder inside the purification tank is insufficient. The stirring device inside the purification tank is then activated to stir the sewage, and the sewage inside the purification tank is sampled again.

[0047] In one embodiment, the lime powder calculation module 301 is further configured to determine that there is a reaction blind zone inside the purification tank if the sampling difference is still not less than a preset reasonable value after a preset number of stirring and sampling; find and determine the sampling point information corresponding to the maximum and minimum values ​​of the secondary sampling pH; and send the sampling point information to the user terminal so as to process the reaction blind zone inside the purification tank according to the sampling point information.

[0048] In one embodiment, the lime powder calculation module 301 is further used to compare the secondary sampling pH of the wastewater at each sampling point with the standard pH range; count the number of qualified sampling points whose secondary sampling pH is within the standard pH range; and if the number of qualified sampling points is greater than the preset number of qualified points, it is determined that the pH adjustment of the wastewater in the purification tank is complete.

[0049] In one embodiment, the lime powder calculation module 301 is further configured to extract wastewater at a preset first time after sampling at the sampling point, and then extract wastewater at a preset second time; discard the wastewater sampled at the first time, and set the pH of the wastewater sampled at the second time to the pH of the initial sampling at the sampling point.

[0050] This application also discloses a computer device.

[0051] Specifically, the computer device includes a memory and a processor, the memory storing a computer program that can be loaded by the processor and executed for the aforementioned acid-base adjustment method for wastewater treatment.

[0052] This application also discloses a computer-readable storage medium.

[0053] Specifically, the computer-readable storage medium stores a computer program that can be loaded by a processor and executed, such as the pH adjustment method for wastewater treatment described above. The computer-readable storage medium includes, for example, various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0054] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A method for adjusting pH in wastewater treatment, characterized in that, The method is based on a lime powder feeding device, which includes a feeding box and a mixing box located above the sewage purification tank. The mixing box is located below the feeding box and is used to hold lime powder. The feeding box is equipped with a conveying unit for transporting the lime powder inside the feeding box to the mixing box. The bottom of the feeding box is equipped with a weight detection unit for detecting the weight of the feeding box. The mixing box is equipped with a mixing unit for stirring the contents of the mixing box. The mixing box is connected to a water source through a first pump body. The bottom of the mixing box is connected to the purification tank through a feeding pipe. The feeding pipe is equipped with a solenoid valve for controlling the opening and closing of the feeding pipe. The method includes: The initial pH of the wastewater inside the purification tank is detected and obtained, and the actual amount of lime powder to be added is calculated based on the initial pH. The material conveying unit in the control feeding box is started to transport lime powder to the mixing box until the difference between the weight values ​​detected by the weight detection unit and the actual amount added is reached. The first pump is started to draw clean water into the mixing tank; The mixing unit is activated to stir the mixture of water and lime powder in the mixing tank. The solenoid valve is opened to add the mixture from the mixing tank to the purification tank.

2. The method according to claim 1, characterized in that, The calculation of the actual amount of lime powder to be added based on the initial pH includes: The standard amount of lime powder to be added is calculated based on the initial pH of the wastewater. The standard amount of lime powder to be added is the amount of lime powder to be added to adjust the current pH of the wastewater to a preset standard pH range. The actual amount of lime powder added is obtained by subtracting the preset adjustment value from the standard amount added. After the control solenoid valve opens to add the mixture from the mixing tank to the purification tank, the process further includes: The neutral pH level of the wastewater inside the purification tank was tested and obtained again, and the neutral pH level was compared with the standard pH range. If the neutral pH is less than the standard pH range, calculate the neutralization difference between the standard pH range and the neutral pH, recalculate the secondary addition amount of lime powder based on the neutralization difference, and add lime powder to the purification tank again according to the secondary addition amount. If the neutral pH level is within the standard pH range, then the pH adjustment of the wastewater in the purification tank is considered complete.

3. The method according to claim 2, characterized in that, The dispensing device also includes several sampling points set at different locations in the water purification tank; The detection and acquisition of the initial pH of the wastewater inside the purification tank includes: The initial sampling pH of the wastewater at each sampling point is detected and obtained, and the average value of several initial sampling pH values ​​is set as the initial pH. The step of re-detecting and obtaining the neutralized pH of the wastewater inside the purification tank, and comparing the neutralized pH with a preset standard pH range, includes: The secondary sampling pH of the wastewater at each sampling point was tested and obtained again, and the maximum and minimum values ​​among the secondary sampling pH values ​​were determined. The pH range corresponding to the maximum and minimum values ​​in the secondary sampling pH is set as the neutral pH. The neutral pH level is compared with a preset standard pH range; If both the maximum and minimum values ​​of the neutralized pH are within the range of the standard pH, then the neutralized pH is determined to be within the range of the standard pH. If the maximum value of the neutralized pH is less than the standard pH range, then the neutralized pH is determined to be less than the standard pH range.

4. The method according to claim 3, characterized in that, The step of setting the pH range corresponding to the maximum and minimum values ​​in the secondary sampling pH as the neutral pH includes: Calculate the sampling difference between the maximum and minimum values ​​of the secondary sampling pH. If the sampling difference is less than a preset reasonable value, then set the pH range corresponding to the maximum and minimum values ​​of the secondary sampling pH as the neutral pH. If the sampling difference is not less than the preset reasonable value, it is determined that the uniformity of the mixing between the sewage and lime powder inside the purification tank is insufficient. After the stirring device inside the purification tank is activated to stir the sewage, the sewage inside the purification tank is sampled again.

5. The method according to claim 4, characterized in that, After the stirring device inside the control purification tank is activated to stir the wastewater, and after sampling the wastewater inside the purification tank again, the process further includes: If, after a preset number of stirring and sampling cycles, the sampling difference is still not less than a preset reasonable value, then it is determined that there is a reaction blind zone inside the purification tank. Locate and determine the sampling point information corresponding to the maximum and minimum values ​​of pH in the secondary sampling; The location information is sent to the user terminal so that the reaction blind zone inside the purification tank can be treated according to the location information.

6. The method according to claim 5, characterized in that, After determining that a reaction blind zone exists inside the purification tank, the method further includes: The pH of the secondary samples of wastewater at each sampling point was compared with the standard pH range. Count the number of qualified sampling points whose pH values ​​during secondary sampling are within the standard pH range; If the number of qualified sampling points is greater than the preset number of qualified points, it is determined that the acidity and alkalinity adjustment of the wastewater in the purification tank has been completed.

7. The method according to claim 3, characterized in that, The detection and acquisition of the initial sampling pH of wastewater at each sampling point includes: After sampling wastewater at a predetermined first time point, wastewater is then sampled again at a predetermined second time point. The wastewater sampled at the first time point is discarded, and the pH of the wastewater sampled at the second time point is set to the initial pH of the sampling point.

8. A pH adjustment device for wastewater treatment, characterized in that, The device is based on a lime powder feeding device, which includes a feeding box and a mixing box located above the sewage purification tank. The mixing box is located below the feeding box and is used to hold lime powder. The feeding box is equipped with a conveying unit for transporting the lime powder inside the feeding box to the mixing box. The bottom of the feeding box is equipped with a weight detection unit for detecting the weight of the feeding box. The mixing box is equipped with a mixing unit for stirring the contents of the mixing box. The mixing box is connected to a water source through a first pump body. The bottom of the mixing box is connected to the purification tank through a feeding pipe. The feeding pipe is equipped with a solenoid valve for controlling the opening and closing of the feeding pipe. The device includes: The lime powder calculation module (301) is used to detect and obtain the initial pH of the sewage inside the purification tank, and calculate the actual amount of lime powder to be added based on the initial pH. The lime powder addition module (302) is used to control the material conveying unit in the feeding box to start conveying lime powder to the mixing box until the difference between the weight values ​​detected by the weight detection unit and the actual addition amount is reached. The clean water addition module (303) is used to control the first pump to start and pump clean water into the mixing tank; The mixing module (304) is used to control the mixing unit to start stirring the mixture of water and lime powder in the mixing tank; The mixing liquid dispensing module (305) is used to control the solenoid valve to open and add the mixing liquid in the mixing tank to the purification tank.

9. A computer device, characterized in that, It includes a memory and a processor, wherein the memory stores a computer program that can be loaded by the processor and executed as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer program is stored that can be loaded by a processor and execute the method as described in any one of claims 1 to 7.

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