Precise disinfection method suitable for single-village water station based on water peak valley characteristics

Abstract

The invention relates to the technical field of drinking water disinfection, and discloses a precise disinfection method suitable for a single-village water station based on water peak and valley characteristics, and the method comprises the following steps: determining basic information of a water supply system of the single-village water station; according to the basic information of the single-village water station water supply system, determining a resident water peak valley characteristic period; determining hydraulic retention time in a pipe network according to the basic information of the single-village water station water supply system and the resident water peak-valley characteristic period; and according to the hydraulic retention time in the pipe network, determining the dosage of the disinfectant in the single-village water station. By adopting the method disclosed by the invention, the dosage of the disinfectant can be reversely deduced according to the characteristics of the single-village water station and the water supply system thereof, the characteristics of water peak and valley, temperature and other change factors, the problems of quantitative addition, excessive disinfectant addition, large peculiar smell and the like in a traditional disinfection method are solved, accurate disinfection is realized, and the working efficiency is improved. And the water use safety of all users in a pipe network is ensured while the odor of the disinfectant is reduced as much as possible, the water use willingness of villagers is improved, and the water treatment cost is saved.

Description

Technical Field

[0001] The present application relates to the technical field of drinking water disinfection, and in particular to the design of a precise disinfection method suitable for a single village water station based on the peak and valley characteristics of water use. Background Art

[0002] Single village water stations are the best choice for solving water problems in remote mountainous areas and islands, with the characteristics of small water supply scale and stable water use pattern. Disinfection is the most important link affecting rural water supply projects and management. At present, the addition of disinfectants in single village water stations basically adopts quantitative addition or slow-release disinfection methods, which is not conducive to rural water supply projects and management.

[0003] At present, the most economical and feasible method for urban water supply is to add disinfectants quantitatively because of the large population, large and stable water supply. However, this method has no reference for the precise disinfection of rural water supply, and there are very few precise disinfection methods suitable for rural water supply, especially for single-village water supply. In order to ensure the drinking water safety of villagers and promote their enthusiasm for water use, it is urgent to study a precise disinfection method. Summary of the invention

[0004] The purpose of the embodiment of the present application is to provide a precise disinfection method suitable for a single-village water station based on the peak and valley characteristics of water use. In order to solve the problems of quantitative addition, excessive addition of disinfectants, and strong odor in traditional disinfection methods, this method can reversely calculate the amount of disinfectant added according to the characteristics of the single-village water station and its water supply system, the peak and valley characteristics of water use, temperature and other changing factors, to achieve precise disinfection, and while minimizing the odor of the disinfectant, ensure the water safety of all users in the pipeline network, thereby increasing villagers' willingness to use water and saving water treatment costs.

[0005] According to a first aspect of an embodiment of the present application, a precise disinfection method applicable to a single village water station based on water usage peak and valley characteristics is provided, comprising: Determine the basic information of the water supply system of a single village water station; Determine the peak and valley characteristic periods of residents' water use based on the basic information of the water supply system of the single village water station; Determine the hydraulic retention time in the pipe network according to the basic information of the water supply system of the single village water station and the peak and valley characteristic periods of the residents' water use; The dosage of disinfectant in a single village water station is determined based on the hydraulic retention time in the pipe network.

[0006] Optionally, the basic information of the water supply system of the single village water station specifically includes: the designed water supply scale DC, the diameter of the water supply main pipe D, the length L of each diameter pipe, the permanent population p, the typical daily water consumption curve, the water use channel and its water use quota; in addition, the following relationship must be satisfied: In the formula, Q is the total daily water consumption calculated based on the water quota, in m 3 / d; n is the type of water use, Refers to the water quota for the ith water use method, in m 3 / (person·d))、 .

[0007] Optionally, determining the peak and valley characteristic periods of residents' water consumption based on the basic information of the water supply system of the single-village water station includes: Analyze the fluctuation characteristics of the typical daily water supply curve and calculate its variance σ; Identify extreme values ​​of a typical daily water supply curve, including maxima and minimum ; According to the variance and extreme value, the boundaries of three water use peak and valley characteristic periods are divided. The three water use peak and valley characteristic periods are low period, normal period and peak period. The water volume divided between the low period and the normal period is The water volume divided between normal period and peak period is , the calculation formulas are: ; ; According to the division results, the duration T of each water use peak and valley characteristic period is analyzed and counted.

[0008] Optionally, determining the dosage of disinfectant in a single village water station according to the hydraulic retention time in the pipe network includes: The dosage of disinfectant in the single village water station is calculated using the residual chlorine pseudo-first-order single exponential decay formula, and the calculation formula is as follows; and the residual chlorine concentration survey results with good water experience at the user end are used as one of the control factors for the calculation; The following requirements must be met: In the formula, C0 is the residual chlorine concentration that needs to be guaranteed after adding disinfectant to the single village water station, in mg / L; C is the residual chlorine concentration at the user end, in mg / L; k is the residual chlorine attenuation coefficient, in h -1 ; HRT is the hydraulic retention time in the pipe network, in h; According to the residual chlorine concentration, the dosage of disinfectant in the single village water station is determined.

[0009] According to a second aspect of an embodiment of the present application, there is provided a precision disinfection device suitable for a single village water station based on water usage peak and valley characteristics, comprising: The first determination module is used to determine the basic information of the water supply system of a single village water station; The second determination module is used to determine the peak and valley characteristic periods of residents' water consumption based on the basic information of the water supply system of the single village water station; The third determination module is used to determine the hydraulic retention time in the pipe network according to the basic information of the water supply system of the single village water station and the peak and valley characteristic period of the residents' water use; The fourth determination module is used to determine the dosage of the disinfectant in the single village water station according to the hydraulic retention time in the pipe network.

[0010] According to a third aspect of an embodiment of the present application, there is provided an electronic device, including: one or more processors; A memory for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the method as described in the first aspect.

[0011] According to a fourth aspect of an embodiment of the present application, a computer-readable storage medium is provided, on which computer instructions are stored, and when the instructions are executed by a processor, the steps of the method described in the first aspect are implemented.

[0012] The technical solution provided by the embodiments of the present application may have the following beneficial effects: In order to solve the problems of quantitative addition, excessive disinfectant addition, and strong odor in traditional disinfection methods, this method can reversely calculate the disinfectant dosage according to the characteristics of a single village water station and its water supply system, water use peak and valley characteristics, temperature and other changing factors, to achieve precise disinfection, and while minimizing the odor of the disinfectant, ensure the water safety of all users in the pipeline network, increase villagers' willingness to use water and save water treatment costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0014] Figure 1 It is a flow chart showing a precise disinfection method applicable to a single-village water station based on the peak and valley characteristics of water usage according to an exemplary embodiment.

[0015] Figure 2 It is a typical daily water consumption curve diagram of the land supplied by a single village water station according to an exemplary embodiment.

[0016] Figure 3 It is a result of dividing the daily water consumption into peak period, normal period and valley period according to an exemplary embodiment.

[0017] Figure 4It is a block diagram of a precision disinfection device suitable for a single-village water station based on water usage peak and valley characteristics according to an exemplary embodiment.

[0018] Figure 5 The diagram is a schematic structural diagram of an electronic device according to an exemplary embodiment. DETAILED DESCRIPTION

[0019] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0020] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0021] It should be understood that although the terms first, second, third, etc. may be used in the present application to describe various information, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0022] The purpose of the present invention is to provide a precise disinfection method suitable for a single village water station based on the peak and valley characteristics of water use, which can reduce the odor of the disinfectant as much as possible while ensuring the water safety of all users in the pipe network, and achieve precise disinfection. In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] Figure 1 The present invention is a flowchart of a precise disinfection method for a single village water station based on water usage peak and valley characteristics according to an exemplary embodiment, comprising the following steps: S1: Determine the basic information of the water supply system of a single village water station.

[0024] Specifically, the basic information of the water supply system of a single village water station includes: designed water supply scale DC, diameter of water supply main pipe D, length L of pipes of different diameters, permanent population p, typical daily water consumption curve, main water use channels and water use quotas. In particular, in order to ensure the rationality of the quota value, the following relationship should be established:

[0025] In the formula, Q is the total daily water consumption calculated based on the water quota, in m 3 / d. n is the type of water use, The water quota for the i-th water use route, in m 3 / (person·d)). .

[0026] This example selects a single village water station, and its design water supply capacity DC is 20m 3 / d, the beneficiary population p is 74 people, and the water supply network includes DN50 pipes with a length of 115m, DN32 pipes with a length of 427m, and DN20 pipes with a length of 165m. The typical water consumption curve of the water station is as follows Figure 2 shown.

[0027] According to the characteristics of the water supply target of this single village water station, most of the users are elderly people, and the main ways of using water are washing, bathing, cooking, drinking, flushing toilets, and other ways. By querying the data, it is determined that the quotas for different water use in this area are q 洗漱 =10L / person-day, q 洗澡 =30 L / person-day, q 做饭 =24 L / person-day, q 饮用 =2 L / person-day, q 冲厕 =32 L / person-day, q 其它 =36.2 L / person-day. And the daily domestic water consumption Q is 10m 3 , meet the design water supply scale DC is less than 20m 3 / d requirements.

[0028] S2: Determine the peak and valley characteristic periods of residents' water consumption based on the basic information of the water supply system of the single-village water station.

[0029] Specifically, the peak and valley characteristic period of residential water consumption is divided according to the three characteristic values ​​of the typical daily water consumption curve, namely, variance σ, maximum value and minimum Finally, according to the division results, the duration T of each water use peak and valley characteristic period is analyzed and counted.

[0030] Variance can measure the degree of dispersion of a set of data and is the best indicator for characterizing the fluctuation characteristics of water consumption curve; and the "peak and valley" characteristics of water consumption are closely related to the maximum and minimum values, so these three characteristic values ​​can truly reflect the water consumption characteristics of a single village water station. The water volume divided between normal period and peak period is , the calculation formulas are:

[0031] According to the fluctuation characteristics of the typical daily water consumption curve in the basic information of the single village water station water supply system, three water consumption characteristic periods are divided. The variance σ of the typical daily water consumption curve is calculated, and the extreme value of the typical daily water consumption curve is identified. and , divide the daily water consumption into peak period, normal period and valley period, and the division results are as follows Figure 3 shown.

[0032] Finally, determine the starting time, ending time and duration of the peak and valley characteristic period of water use (T 高峰 , T 平常 , T 低谷 , unit is h), the analysis results are as follows Table 1: Table 1:

[0033] S3: Determine the hydraulic retention time in the pipe network according to the basic information of the water supply system of the single-village water station and the peak and valley characteristic periods of residents' water use.

[0034] Specifically, the water supply network content volume V is calculated according to the water supply main pipe diameter and its length in the basic information of the single-village water station water supply system, and the calculation formula is: Then determine the hydraulic retention time in the network. Taking the hydraulic retention time of the farthest user in the network during peak hours as an example, the calculation formula is as follows: Where V is the volume of the water supply network, in m 3 , the water supply network consists of m pipes of different diameters. Refers to the diameter of the jth type of pipe, in meters. Refers to the length of the j-th diameter pipe, in meters. .Q 高峰期 The peak water consumption is calculated based on the water use route and water use quota, in m 3 . T 高峰期is the peak time duration, in h. 高峰期 is the average flow velocity in the pipe network during peak hours, in m 3 / h. HRT 高峰期 It is the residence time of water in the pipe network during peak period.

[0035] According to the diameter and length of the water supply pipe, the volume of the water supply network in the village, that is, the volume of the network transported to the farthest user, is 0.62m 3 The pipe network volume delivered to the nearest user is 0.098m 3 The HRT analysis results of water residence time in the pipe network during different water consumption peak and valley characteristic periods are shown in Table 2 below.

[0036] Table 2:

[0037] S4: Determine the dosage of disinfectant in the single village water station according to the hydraulic retention time in the pipe network.

[0038] Specifically, the dosage of disinfectant is calculated using the residual chlorine pseudo-first-order single exponential decay formula for engineering application, and the calculation formula is as follows. The survey results of residual chlorine concentration with good water experience at the user end are used as one of the control factors for the calculation.

[0039] The following requirements must be met: In the formula, C0 is the residual chlorine concentration that needs to be guaranteed after adding disinfectant to a single village water station, in mg / L. Its restriction condition is based on the requirements for the concentration of free chlorine in the factory water in "GB 5749-2022 Drinking Water Hygiene Standard". If the calculated result exceeds the range, the upper / lower limit is directly used. C is the residual chlorine concentration at the user end, in mg / L. Its lower limit condition is based on the requirements for the concentration of free chlorine in the terminal water in "GB5749-2022 Drinking Water Hygiene Standard". The upper limit condition is determined based on the survey results of the average residual chlorine concentration for good drinking water experience at the user end, so as to achieve the best experience while meeting national standards. k is the residual chlorine attenuation coefficient, in h -1 In particular, the residual chlorine attenuation coefficient at different temperatures (or seasons) should be considered to achieve precise disinfection effects.

[0040] This embodiment uses a pseudo-first-order single exponential attenuation formula for residual chlorine to facilitate engineering applications. This example is based on the survey results of the average residual chlorine concentration for good drinking water experience at the user end. The residual chlorine concentration C at the user end ranges from 0.05 to 0.5 mg / L. According to the attenuation characteristics of residual chlorine, this requires that the residual chlorine concentration of the nearest user shall not be higher than 0.5 mg / L, and the residual chlorine concentration of the farthest user shall not be lower than 0.05 mg / L. The residual chlorine attenuation coefficient k is determined by consulting literature or field testing. Considering that temperature has a non-negligible effect on the attenuation of residual chlorine, the residual chlorine attenuation coefficients for summer and winter are determined in this embodiment, which are k and k, respectively. 夏 =0.3192 h -1 and k 冬 =0.0391h -1 .

[0041] Finally, the dosage of disinfectant in a single village water station was calculated, and the analysis results of the dosage of disinfectant in water stations in different seasons and different water use peak and valley characteristic periods are shown in Table 3. The calculation results are all within the factory water residual chlorine limit required by GB 5749-2022 Drinking Water Hygiene Standard.

[0042] Table 3:

[0043] It can be seen from the above embodiments that the present application proposes a precise disinfection method suitable for a single-village water station based on the peak and valley characteristics of water use. The amount of disinfectant added can be reversed according to the characteristics of the single-village water station and its water supply system, the peak and valley characteristics of water use, temperature and other changing factors to achieve precise disinfection. It can also ensure the water safety of all users in the pipeline network while minimizing the odor of the disinfectant, thereby saving water treatment costs.

[0044] Corresponding to the aforementioned embodiment of the precise disinfection method applicable to a single-village water station based on the peak and valley characteristics of water use, the present application also provides an embodiment of a precise disinfection device applicable to a single-village water station based on the peak and valley characteristics of water use.

[0045] Figure 4 This is a block diagram of a precise disinfection device suitable for a single village water station based on water usage peak and valley characteristics according to an exemplary embodiment. Figure 4 , the device comprises:

[0046] The first determination module 1 is used to determine the basic information of the water supply system of a single village water station; The second determination module 2 is used to determine the peak and valley characteristic periods of residents' water consumption according to the basic information of the water supply system of the single village water station; The third determination module 3 is used to determine the hydraulic retention time in the pipe network according to the basic information of the water supply system of the single village water station and the peak and valley characteristic period of the residents' water use; The fourth determination module 4 is used to determine the dosage of the disinfectant in the single village water station according to the hydraulic retention time in the pipe network.

[0047] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0048] For the device embodiment, since it basically corresponds to the method embodiment, the relevant parts can refer to the partial description of the method embodiment. The device embodiment described above is only schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present application scheme. A person of ordinary skill in the art can understand and implement it without paying any creative work.

[0049] Accordingly, the present application also provides an electronic device, including: one or more processors; a memory for storing one or more programs; when the one or more programs are executed by the one or more processors, the one or more processors implement the above-mentioned precise disinfection method based on the peak and valley characteristics of water consumption and applicable to a single village water station. Figure 5 As shown, it is a hardware structure diagram of any device with data processing capability where a precise disinfection device based on water consumption peak and valley characteristics suitable for a single village water station provided by an embodiment of the present invention is located, except Figure 5 In addition to the processor, memory, DMA controller, disk, and non-volatile memory shown, any device with data processing capabilities in which the apparatus in the embodiment is located may also include other hardware, which will not be described in detail, generally based on the actual functions of the device with data processing capabilities.

[0050] Accordingly, the present application also provides a computer-readable storage medium on which computer instructions are stored, and when the instructions are executed by the processor, the above-mentioned precise disinfection method suitable for a single-village water station based on the peak and valley characteristics of water use is implemented. The computer-readable storage medium can be an internal storage unit of any device with data processing capabilities described in any of the foregoing embodiments, such as a hard disk or a memory. The computer-readable storage medium can also be an external storage device, such as a plug-in hard disk, a smart memory card (Smart Media Card, SMC), an SD card, a flash card (FlashCard), etc. equipped on the device. Furthermore, the computer-readable storage medium can also include both an internal storage unit and an external storage device of any device with data processing capabilities. The computer-readable storage medium is used to store the computer program and other programs and data required by any device with data processing capabilities, and can also be used to temporarily store data that has been output or is to be output.

[0051] Those skilled in the art will readily appreciate other embodiments of the present application after considering the description and practicing the contents disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The description and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the claims.

[0052] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A precise disinfection method suitable for a single village water station based on the peak and valley characteristics of water use, characterized in that: include: Determine the basic information of the water supply system of a single village water station; Determine the peak and valley characteristic periods of residents' water use based on the basic information of the water supply system of the single village water station; Determine the hydraulic retention time in the pipe network according to the basic information of the water supply system of the single village water station and the peak and valley characteristic periods of the residents' water use; The dosage of disinfectant in a single village water station is determined based on the hydraulic retention time in the pipe network.

2. The method according to claim 1, characterized in that The basic information of the water supply system of a single village water station specifically includes: the designed water supply scale DC, the diameter of the water supply main pipe D, the length L of each diameter pipe, the permanent population p, the typical daily water consumption curve, the water use channel and its water use quota; in addition, the following relationship must be satisfied: In the formula, Q is the total daily water consumption calculated based on the water quota, in m 3 / d; n is the type of water use, Refers to the water quota for the ith water use method, in m 3 / (person·d))、 .

3. The method according to claim 1, characterized in that Based on the basic information of the water supply system of the single village water station, determine the peak and valley characteristic periods of residents' water use, including: Analyze the fluctuation characteristics of the typical daily water supply curve and calculate its variance σ; Identify extreme values ​​of a typical daily water supply curve, including maxima and minimum ; According to the variance and extreme value, the boundaries of three water use peak and valley characteristic periods are divided. The three water use peak and valley characteristic periods are low period, normal period and peak period. The water volume divided between the low period and the normal period is The water volume divided between normal period and peak period is , the calculation formulas are: ； ； According to the division results, the duration T of each water use peak and valley characteristic period is analyzed and counted.

4. The method according to claim 1, characterized in that: According to the hydraulic retention time in the pipe network, the dosage of disinfectant in the single village water station is determined, including: The dosage of disinfectant in the single village water station is calculated using the residual chlorine pseudo-first-order single exponential decay formula, and the calculation formula is as follows; and the residual chlorine concentration survey results with good water experience at the user end are used as one of the control factors for the calculation; ； And the following requirements must be met: ； ； In the formula, C0 is the residual chlorine concentration that needs to be guaranteed after adding disinfectant to the single village water station, in mg / L; C is the residual chlorine concentration at the user end, in mg / L; k is the residual chlorine attenuation coefficient, in h -1 ; HRT is the hydraulic retention time in the pipe network, in h; According to the residual chlorine concentration, the dosage of disinfectant in the single village water station is determined.

5. A precise disinfection device suitable for a single village water station based on the peak and valley characteristics of water use, characterized in that: include: The first determination module is used to determine the basic information of the water supply system of a single village water station; The second determination module is used to determine the peak and valley characteristic periods of residents' water consumption based on the basic information of the water supply system of the single village water station; The third determination module is used to determine the hydraulic retention time in the pipe network according to the basic information of the water supply system of the single village water station and the peak and valley characteristic period of the residents' water use; The fourth determination module is used to determine the dosage of the disinfectant in the single village water station according to the hydraulic retention time in the pipe network.

6. An electronic device, characterized in that: include: one or more processors; A memory for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the method according to any one of claims 1 to 4.

7. A computer-readable storage medium having computer instructions stored thereon, characterized in that: When the instruction is executed by a processor, the steps of the method according to any one of claims 1 to 4 are implemented.

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