A method for determining the scale of a sewage system upgrading and efficiency improving project

Abstract

The present application relates to the technical field of municipal engineering, in particular to a sewage system quality improvement and efficiency enhancement engineering scale determination analysis method. The topological relationship data of the drainage pipe network is sorted and summarized; the tap water consumption and area information of each source block are associated with the nearest drainage pipe network node of the source block; the tap water consumption and area information of the source block associated with the node are assigned to the drainage pipe network node; the unit flow reconstruction cost Cr of each line is calculated, and the lines are sorted in descending order of Cr; according to the concentration improvement requirement, the sewage quantity scale to be rectified is calculated; according to the determined sewage quantity scale, a plurality of sewage lines are selected for rectification in the order of Cr from small to large.

Description

TECHNICAL FIELD

[0001] The present application relates to the municipal engineering technical field, and in particular to a sewage system quality improvement and efficiency enhancement project scale determination analysis method. BACKGROUND

[0002] At present, the treatment of black and odorous water bodies and the quality improvement and efficiency enhancement of sewage treatment have entered the critical stage. Network reconstruction, source block pipeline reconstruction and concentration improvement have become the focus of work. However, the municipal network and source block are large in scale, widely distributed and complex in problems. It is difficult to implement the reconstruction in a short period of time and a large amount of funds are needed. Therefore, it is necessary to select key areas for batch implementation. However, there is still no good method for reasonably arranging the batch scale, selecting the priority implementation area, and ensuring the reconstruction effect and facilitating the examination. At present, the network and community of a certain area are all reconstructed in the project. However, on the one hand, there is no effect due to the lack of key points, and on the other hand, the community may be scattered into multiple trunk pipes, resulting in no significant improvement in the concentration of municipal pipelines or sewage plants. SUMMARY

[0003] The purpose of the present application is to overcome the defects of the prior art and provide a sewage system quality improvement and efficiency enhancement project scale determination analysis method, which can improve the efficiency of statistical analysis and determination of the quality improvement and efficiency enhancement project scale by 10 times.

[0004] The present application provides a sewage system quality improvement and efficiency enhancement project scale determination analysis method, which comprises the following steps:

[0005] The topological relationship data of the drainage network is sorted and summarized;

[0006] The tap water consumption and area information of each source block are associated with the nearest drainage network node of the source block;

[0007] The tap water consumption and area of the source block associated with the node are assigned to the drainage network node, and the drainage network nodes without associated tap water consumption and area of the source block are assigned a value of 0;

[0008] The reconstruction cost Cr of the unit flow of each line is calculated, and the lines are sorted in descending order of Cr;

[0009] According to the concentration improvement requirement, the sewage quantity scale to be improved is calculated;

[0010] According to the determined sewage quantity scale, a plurality of sewage lines are selected for improvement in descending order of Cr.

[0011] More preferably, it further comprises:

[0012] The municipal network and source block associated with the selected line are taken as the improvement project content to form an improvement list.

[0013] More preferably, it also includes:

[0014] The end node of each line is taken as the water quality assessment node.

[0015] More preferably, the calculation of the unit flow renovation cost Cr of each line includes:

[0016] The tap water consumption of the node is converted into the sewage quantity of the node;

[0017] The collected sewage quantity qr of each line in the entire pipe network is calculated;

[0018] The renovation cost Pr of each line is calculated;

[0019] The unit flow renovation cost Cr of each line is calculated according to the formula Cr=Pr / qr.

[0020] More preferably, the collated and summarized drainage pipe network topology relationship data includes pipe section data and node data.

[0021] More preferably, the pipe section data includes pipe section number, pipe diameter, length and start and end node numbers, and the node data includes node number, node elevation and coordinates.

[0022] More preferably, the acquisition method of the entire pipe network line includes:

[0023] Starting from the end node of the drainage pipe network, all pipe network lines are searched through a depth-first algorithm.

[0024] More preferably, the method of searching for all pipe network lines through a depth-first algorithm includes:

[0025] Recursion is achieved by using a stack structure, starting from the end node to search for all routes connected to the node, and the searched route set is stored in an array R;

[0026] The elements stored in the stack are nodes in the pipe network, after successfully accessing a node each time, the node is stacked, and the adjacent points of the top element T of the stack are searched; if all adjacent points of T do not satisfy the accessed condition, T is out of the stack, the nodes saved in the stack are connected in turn, and the top node of the stack is connected with the newly searched node, thereby obtaining a sewage treatment line r;

[0027] It is judged whether the newly searched node satisfies the following conditions: the node is already in the stack, or the node is an end node, or the line r generated by the node is already in the array set;

[0028] If the judgment is yes, the next adjacent point of T is searched, and if the judgment is no, the node is stacked, and a new route r is added.

[0029] If there is no new adjacent point into the stack, T is out of the stack.

[0030] More preferably, the conversion of the tap water consumption of the node into the node sewage quantity comprises:

[0031] The node sewage quantity qi = the node tap water consumption gi multiplied by the sewage conversion coefficient γ.

[0032] More preferably, the calculation of the collected sewage quantity qr of each line in the whole pipe network line comprises:

[0033] The pipe length Lr and the source land area Sr of each line are counted;

[0034] The reconstruction cost Pr of each line is measured, Pr = Lr x α + Sr x β;

[0035] Wherein, α is the unit length pipe reconstruction cost; β is the unit area source land reconstruction cost.

[0036] The beneficial effects of the present application are: the method can automatically count the total sewage quantity and total area of the source land on different pipe network lines according to the tap water quantity data and area of the source land, then calculate the sewage quantity scale that needs to be improved according to the demand of sewage concentration improvement, then select one or several pipe networks and source lands on the pipe network lines according to the size of the sewage quantity and area for improvement, through the method, the scale of the quality improvement and efficiency improvement project and the setting of the examination points can be scientifically determined, the efficiency of the statistical analysis and determination of the scale of the quality improvement and efficiency improvement project can be improved by 10 times through the program assisted manual decision. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 It is a method flowchart of the present application;

[0038] Figure 2 It is a depth first search flowchart of the present application. DETAILED DESCRIPTION

[0039] In order to make the technical problems, technical solutions and beneficial effects of the present application more clear, the present application will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application, and are not used to limit the present application.

[0040] It should be understood that when used in the specification and the appended claims of the present application, the term "comprising" indicates the presence of the described features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or collections thereof.

[0041] It should also be understood that the term "and / or" as used herein, in the specification and in the claims, means any combination of one or more of the associated listed items can be covered and all possible combinations and permutation of these combinations are included.

[0042] As used in the specification and in the claims, the term "if' can be interpreted as meaning "when" or "once" or "in response to a determination" or "in response to detecting" depending on the context. Similarly, the phrase "if it is determined" or "if [the described condition or event] is detected" can be interpreted to mean "once it is determined" or "in response to a determination" or "once [the described condition or event] is detected" or "in response to detecting [the described condition or event]" depending on the context.

[0043] In addition, in the description of the present application and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0044] Reference in the specification to "one embodiment" or "some embodiments" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrase "in one embodiment" or "in some embodiments" in various places in the specification are not necessarily all referring to the same embodiment, although it can. The terms "including," "containing," "having," and variations thereof are meant to encompass the terms "including but not limited to." The term "plurality" means "two or more."

[0045] Embodiment one

[0046] Figure 1 The preferred embodiment of the present application is shown Figure 1 A flowchart of a sewage system upgrading and efficiency improving project scale determination analysis method provided by the first embodiment of the present application is shown. For ease of illustration, only the parts related to the present embodiment are shown, and are described in detail as follows:

[0047] Step 1, collate and summarize the topological relationship data of the drainage pipe network. Including pipe section data (pipe section number, pipe diameter, length, start and end node number, etc.), node data (node number, node elevation, coordinates, etc.).

[0048] Step 2, obtain the self-supply water consumption and area information of each source land through the geographic information system and KNN algorithm, and associate it with the nearest drainage pipe network node of the source land. Please refer to the patent "A method for automatically counting water consumption data for integrated supply and drainage foundation".

[0049] Step 3, the source block of the node associated with the tap water usage and area of the sewer network node is assigned to the node, and the other nodes without associated source block tap water usage and area of the sewer network node are assigned 0 value.

[0050] Step 4, the tap water usage of the node is converted into the node sewage quantity, and the conversion method is qi = gi x γ, where gi is the tap water usage of the node, and γ is the sewage conversion coefficient. The sewage conversion coefficient can be selected according to the regional sewage special planning. If the city is not specified in the sewage special planning, the value can be selected according to article 4.3.8 of "Code for Planning of Urban Drainage Engineering" GB50318-2017.

[0051] Step 5, starting from the end node of the sewer network, search all the network lines by depth-first algorithm, and calculate the collection sewage quantity qr of each line.

[0052] Step 6, the length of each line Lr and the area of the source block Sr are counted, and the reconstruction cost Pr of each line is calculated.

[0053] Pr = Lr x a + Sr x b

[0054] Where a is the unit length pipe reconstruction cost, and b is the unit area source block reconstruction cost.

[0055] Step 7, calculate the unit flow reconstruction cost Cr of each line, Cr = Pr / qr, and sort the lines in descending order of Cr.

[0056] Step 8, according to the concentration improvement demand, calculate the sewage quantity scale that needs to be improved.

[0057] Step 9, according to the determined sewage quantity scale, select several sewage lines for improvement in the order of Cr from small to large, so as to ensure that the improvement cost is the smallest under the premise of meeting the improvement sewage quantity scale.

[0058] Step 10, the municipal pipe network and source block associated with the selected line are taken as the engineering content of the improvement, and the improvement list is formed.

[0059] Step 11, the end node of each line is taken as the water quality assessment node.

[0060] Alpha and beta can be obtained by empirical method, quota calculation method, etc. The empirical method is to select the local pipe network reconstruction and repair projects completed in the past three years, and the reconstruction length, area and investment of the source block transformation, and to calculate the unit length pipe reconstruction cost and the unit area source block transformation cost. The quota calculation method is to select several municipal roads and several typical blocks to carry out deepening design, calculate detailed quantities, and calculate the investment of each pipe and each block transformation to obtain the unit length pipe reconstruction cost alpha and the unit area source block transformation cost beta. According to the project experience, alpha and beta values are recommended in combination with the nature of municipal pipe network and source block.

[0061] The alpha and beta values are illustrated below in combination with Table 1 and Table 2.

[0062] Table 1 Recommended value of unit area transformation cost of different source blocks

[0063] Serial number Description of land Recommended beta value (yuan / square meter) 1 Confluence land 120 2 Divergence land built within 5 years 45 3 Divergence land built more than 5 years 70

[0064] Table 2 Unit length reconstruction cost of different pipe diameters (unit: yuan / m)

[0065] Pipe diameter D400 D500 D600 D800 D1000 D1200 D1500 Overall repair 6000 6200 6500 6700 7200 7500 8500

[0066] The average alpha and beta values can be calculated by weighted average according to the proportion of community types and the proportion of municipal pipe diameters.

[0067] Example Two

[0068] The preferred embodiment of the present embodiment is searched by a depth-first algorithm, and the method flow is as shown in Figure 2 The depth-first algorithm search includes the following steps:

[0069] ① A stack structure is used to realize recursion, and all routes connected to the node are searched from the end node, and the searched route set is stored in array R.

[0070] ② The elements stored in the stack are nodes in the pipe network. After successfully accessing a node, the node is stacked, and the adjacent points of the top element T in the stack are searched. If all adjacent points of T do not satisfy the access condition, T is out of the stack, the nodes saved in the stack are connected in turn, and the top node of the stack is connected with the newly searched node, that is, a sewage treatment route r is obtained.

[0071] ③ Judge whether the newly searched node satisfies the following three conditions: the node is in the stack, or the node is the end node, or the route r generated by the node is in the array set.

[0072] ④ If yes, continue to search the next adjacent point of T. If no, the node is stacked, and a new route r is added.

[0073] V. If there is no new adjacent point to stack, then T is popped.

[0074] It should be understood that the particular order or hierarchy of steps in the processes disclosed is an example that can be re-arranged as desired. The particular order or hierarchy of steps in the processes disclosed should not be construed as limitations on the claimed subject matter. The accompanying method claims present elements of the various steps in a sample order, and are not meant to be limited to the specific order or hierarchy presented.

[0075] In the foregoing detailed description, various features are grouped together in single embodiments for the purpose of streamlining the disclosure. This disclosure is not to be interpreted as reflecting an intention that the embodiments of the claimed subject matter require more features than are expressly recited in each claim. Rather, as the claims below reflect, inventive subject matter lies in fewer than all features of a single disclosed embodiment. Thus, the following claims are hereby expressly incorporated into this detailed description, with each claim acting as a separate embodiment of the claimed subject matter.

[0076] The disclosed embodiments have been described above to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without the use of the inventive faculty. Thus, the present disclosure is not intended to be limited to the embodiments described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0077] The above description includes one or more examples of the embodiments. Of course, not all possible combinations of components or steps for describing the embodiments above are explicitly described, but one of ordinary skill in the art will recognize that many such combinations are perhaps possible. Thus, the embodiments described herein are intended to encompass all such possible combinations. In addition, as to the term "comprises", where this term is used herein, it is intended to encompass the presence of stated features, integers, steps or components or groups thereof, but does not preclude the presence or addition of one or more other features, integers, steps, components or groups thereof. Furthermore, as used herein, the term "and / or" means "and" or "or", associating with the respective terms.

[0078] The above-described embodiments are only used to illustrate the technical solutions of the present application, but not limit them; although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A method for determining the scale of a wastewater system quality improvement and efficiency enhancement project, characterized in that, Includes the following steps: Organize and summarize the topological relationship data of drainage pipe networks; Information on water consumption and area of ​​each source plot is collected and associated with the nearest drainage network node to the source plot. Assign the water consumption and area of ​​the source plot associated with the node to the drainage network node, and assign 0 value to other drainage network nodes that are not associated with the water consumption and area of ​​the source plot. Calculate the unit flow rate upgrade cost Cr for each line, and sort the lines one by one according to Cr from largest to smallest; Based on the need to increase concentration, calculate the scale of wastewater that needs to be rectified; Based on the determined scale of sewage volume, several sewage lines are selected for treatment in ascending order of Cr content; Also includes: The municipal pipeline network and source plots associated with the selected route are included in the rectification project, forming a rectification list; The end point of each line will be used as a water quality assessment point. The calculation of the unit flow rate upgrade cost Cr for each line includes: Convert the water consumption of the node into the sewage consumption of the node; Calculate the amount of sewage collected, qr, for each line in the entire pipeline network; Calculate the cost Pr for upgrading each line; The unit flow rate upgrade cost Cr for each line is calculated using the formula Cr = Pr / qr. The calculation of the sewage collection volume qr for each line in the entire pipeline network includes: Calculate the pipeline length Lr and the area Sr of the source plot for each route; Calculate the cost Pr for each line upgrade, Pr = Lr × α + Sr × β; Where α is the cost of pipeline modification per unit length; β is the cost of source land modification per unit area; Based on the water volume and area of ​​the source plots, the system automatically calculates the total amount of sewage and the total area of ​​the source plots on different pipeline lines. Then, based on the need to increase the sewage concentration, it calculates the scale of sewage that needs to be rectified. Finally, it selects one or more pipeline lines and source plots for rectification according to the size of the sewage volume and area.

2. The method for determining the scale of wastewater system quality improvement and efficiency enhancement projects according to claim 1, characterized in that: The compiled drainage network topology data includes pipe segment data and node data.

3. The method for determining the scale of wastewater system quality improvement and efficiency enhancement projects according to claim 2, characterized in that: The pipe segment data includes the pipe segment number, pipe diameter, length, and start and end node numbers. The node data includes the node number, node elevation, and coordinates.

4. The method for determining the scale of wastewater system quality improvement and efficiency enhancement projects according to claim 1, characterized in that, The methods for obtaining all pipeline lines include: Starting from the end node of the drainage network, a depth-first search algorithm is used to find all the network lines.

5. The method for determining the scale of wastewater system quality improvement and efficiency enhancement projects according to claim 4, characterized in that, The method for finding all pipeline lines using a depth-first search algorithm includes: Recursion is implemented using a stack structure. Starting from the last node, all routes connected to that node are searched, and the set of searched routes is stored in array R. The stack stores the nodes in the pipeline network. After each successful visit to a node, the node is pushed onto the stack, and then the adjacent nodes of the top element T are searched. If none of the adjacent nodes of T meet the visit condition, T is popped from the stack, the nodes stored in the stack are connected in sequence, and then the top node of the stack is connected to the newly searched node to obtain a sewage treatment line r. Determine whether a newly found node meets the following conditions: the node is already in the stack, or the node is the end node, or the line r generated by the node is already in the array collection; If the determination is yes, continue searching for the next adjacent node of T; if the determination is no, push the node onto the stack and add a new route r. If no new adjacent node is pushed onto the stack, then T is popped from the stack.

6. The method for determining the scale of wastewater system quality improvement and efficiency enhancement projects according to claim 1, characterized in that, The process of converting the tap water consumption of a node into the wastewater consumption of that node includes: The wastewater volume at a node, qi, is equal to the water consumption of the node's tap water, gi, multiplied by the wastewater coefficient, γ.

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