Turbid water treatment plant management system

Abstract

The objective of the present invention is to solve the problems of the prior art, namely, to provide a turbid water treatment plant management system that can manage a turbid water treatment plant by remote operation. [Solution] The turbid water treatment plant management system of the present invention is a system for managing a turbid water treatment plant, and comprises two or more neutralizing agent supply lines, an on-off valve, a main supply pipe, and a supply line switching means. Of these, the neutralizing agent supply line includes one or more neutralizing agent containers filled with neutralizing agent and a secondary supply pipe connected to the neutralizing agent container. When the supply line switching means receives switching information, it closes the open secondary supply pipe and controls the on-off valve to open another secondary supply pipe and connect it to the main supply pipe. The neutralizing agent from the neutralizing agent container is then supplied to the turbid water through the main supply pipe from the secondary supply pipe.

Description

Technical Field

[0001] The invention of the present application relates to a technology for a turbid water treatment plant used in tunnel excavation work and the like. More specifically, it relates to a turbid water treatment plant management system capable of remotely operating and changing a line for supplying a neutralizing agent to turbid water.

Background Art

[0002] Approximately two-thirds of the land in Japan is mountainous. Therefore, roads, railways, etc. (hereinafter referred to as "roads, etc.") pass through mountainous areas in many sections. In order to construct roads, etc. in these mountainous areas, it is common to adopt either an excavation method that excavates a part of the slope or a tunnel method that excavates inside the natural ground. The tunnel method generally has a tendency for the construction cost per unit length (construction cost per unit length of roads, etc.) to be higher than that of the excavation method, while the amount of excavated soil (i.e., the amount of soil to be removed) tends to be less than that of the excavation method. In addition, it has the feature that the degree of freedom in the linear planning of roads, etc. is high (for example, it can take a shortcut). To date, more than 10,000 tunnels have been constructed in Japan.

[0003] As a construction method for mountain tunnels, until the 1970s, the "lagging method" that combines steel arch supports with wooden laggings to support the natural ground was the mainstream. Currently, however, NATM (New Austrian Tunnelling Method), which actively utilizes the strength of the natural ground, has become the mainstream. The main feature of NATM is the design concept that expects the strength (arch effect) possessed by the natural ground. Therefore, compared with the conventional lagging method, the scale of tunnel support work can be reduced, and in addition, the construction speed can be improved, thereby reducing the construction cost.

[0004] Here is a brief explanation of the NATM excavation procedure. First, the tunnel face is excavated. In the case of blasting excavation, a drill jumbo is used to drill a hole and load explosives (dynamite), and the blast is carried out after the workers and drill jumbo have evacuated. On the other hand, in the case of mechanical excavation, the tunnel face is cut using a free-section excavator. The excavation length per cycle (1 span length) varies depending on the support pattern set according to the strength of the ground, but generally, excavation is carried out with a span length of 1.0 to 2.0 m. After excavating one span length, the spoil is removed by dump trucks (or rail method) while "scraping" is performed to remove unstable ground (loose rocks, etc.). After the spoil is removed, a head spraying or primary concrete spraying is performed, and if necessary (depending on the support pattern), steel supports are erected, secondary concrete spraying is performed, and then rock bolts are driven in. Furthermore, the primary and secondary concrete spraying work, as well as the rock bolt work, are carried out on the circumferential surface of the tunnel (the surface from the side walls to the top) for the length of the excavated span, i.e., the unexcavated portion.

[0005] In blasting and rock bolt excavation, drill jumbos are used to bore holes in the ground, and the large amount of drilling water used is discharged outside the tunnel. Similarly, shotcrete is typically produced in a batching plant located within the construction site yard, and therefore, large amounts of water are discharged when producing the shotcrete or when cleaning the mixer. Furthermore, groundwater seeps in from the surrounding soil during tunnel excavation, and this seepage water is also discharged outside the tunnel.

[0006] Discharged water from tunnels and batching plants is turbid and highly alkaline, known as "turbid water." When such turbid water is discharged outside the yard, such as into rivers, it is treated to meet discharge standards set by various laws and regulations, including the standards stipulated by the Water Pollution Control Law (pH within the range of 5.8 to 8.6). The "Standard Specifications for Tunneling: Mountain Tunneling Methods and Commentary (Japan Society of Civil Engineers)" states that "appropriate equipment and scale should be considered in advance to satisfy the discharge standards set by relevant laws and regulations." Therefore, turbid water treatment is currently carried out using turbid water treatment equipment such as that shown in Patent Document 1. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Japanese Patent Publication No. 2007-307515 [Overview of the Initiative] [Problems that the invention aims to solve]

[0008] The conventional procedure for treating turbid water will be explained with reference to Figure 14. As shown in this figure, first the turbid water is stored in a raw water tank, and sand, debris, etc. are allowed to settle and then removed. Next, neutralization treatment is performed to adjust the turbid water to a predetermined pH (pH 5.8 to 8.6). Turbid water discharged from tunnel excavation work, etc., is strongly alkaline because it may contain concrete, so carbon dioxide (or dilute sulfuric acid) is often used as a neutralizing agent.

[0009] After neutralization treatment, the turbid water is purified so that the amount of suspended solids (SS) and turbidity meet the standard values. This purification process involves primary flocculation, in which an inorganic coagulant such as polyelectrolyte aluminum chloride (PAC) is added to the turbid water to form fine flocs (basic flocs), and secondary flocculation, in which a polymer coagulant is added to the turbid water to convert the fine flocs into coarse flocs.

[0010] The treated turbid water is transferred to a thickener, where coarse flocs are allowed to settle, separating it into clarified water and sludge. The clarified water is then temporarily stored in a discharge tank, where its pH, suspended solids (SS), and turbidity are checked before it is released into, for example, a river. The sludge, on the other hand, is stored in a sludge storage tank, then compressed in a filter press and transported off-site as dewatered cake.

[0011] As explained above, in turbid water treatment, neutralization is performed to bring the turbid water to a predetermined pH, and purification is performed to ensure that SS and turbidity meet standard values. To confirm that the treated water meets the desired water quality, it is necessary to measure the pH of the treated water, as well as the SS and turbidity. In addition, the remaining amounts of neutralizing agents such as carbon dioxide, or coagulants such as PAC and polymer flocculants, must be checked as needed to avoid interruptions in each treatment process. For this reason, in the past, a person dedicated to turbid water treatment facilities was stationed at the construction site. However, in recent years, with the demand for labor-saving construction and labor shortages, it has become increasingly difficult to secure a dedicated person for turbid water treatment. In particular, at tunnel construction sites, turbid water is continuously generated even on days when construction is suspended, so it has become necessary to always have a dedicated person for turbid water treatment on duty, such as by adopting a shift system, which has become a significant burden on construction work.

[0012] The objective of the present invention is to solve the problems of the prior art, namely, to provide a turbid water treatment plant management system that can manage a turbid water treatment plant by remote operation. [Means for solving the problem]

[0013] The present invention focuses on the arrangement of two or more lines for supplying a neutralizing agent to turbid water, and on the ability to remotely switch between these supply lines according to the remaining amount of the neutralizing agent. This invention is based on a completely new concept.

[0014] The turbid water treatment plant management system of the present invention is a system for managing a turbid water treatment plant and comprises two or more neutralizing agent supply lines, an on-off valve, a main supply pipe, and a supply line switching means. Of these, the neutralizing agent supply line includes one or more neutralizing agent containers filled with neutralizing agent and a secondary supply pipe connected to the neutralizing agent container. The on-off valve is connected to each of the secondary supply pipes related to the two or more neutralizing agent supply lines, and the main supply pipe is connected to the on-off valve. The supply line switching means is a means for controlling the opening and closing of the secondary supply pipes by the on-off valve. The on-off valve opens only one of the two or more secondary supply pipes and connects it to the main supply pipe. When the supply line switching means receives switching information, it closes the open secondary supply pipe and controls the on-off valve to open the other secondary supply pipes and connect them to the main supply pipe. The neutralizing agent from the neutralizing agent containers is then supplied to the turbid water through the secondary supply pipe and the main supply pipe.

[0015] The turbid water treatment plant management system of the present invention may further include a pressure gauge and a switching determination means. The pressure gauge is an instrument that measures the residual pressure in the neutralizing agent container, and the switching determination means is a means that generates switching information when the residual pressure in the neutralizing agent container related to an open neutralizing agent supply line falls below a predetermined residual pressure threshold. In this case, the supply line switching means receives the switching information generated by the switching determination means.

[0016] The turbid water treatment plant management system of the present invention may further include a switching information input means for an operator to select a neutralizing agent supply line and input switching information. In this case, the supply line switching means receives the switching information input by the switching information input means and opens the auxiliary supply pipe of the neutralizing agent supply line related to the switching information and connects it to the main supply pipe.

[0017] The turbid water treatment plant management system of the present invention may further include a pH measuring means, a data storage means, and a report creation means. The pH measuring means is a means for measuring the pH of turbid water or clear water, and the data storage means is a means for storing "measurement data" measured by the pH measuring means and "actual supply amount data" of the supplied neutralizing agent, along with the time. The report creation means is a means for creating a neutralization treatment report that shows the measurement data and actual supply amount data for each time period, based on the measurement data and actual supply amount data read from the data storage means. The actual supply amount data is the amount of neutralizing agent that filled the neutralizing agent container related to the auxiliary supply pipe, which was opened once and then closed by the supply line switching means.

[0018] The turbid water treatment plant management system of the present invention may further include a pH measuring means for measuring the pH of the clarified water in the discharge tank and an alert output means for outputting an alert. The alert output means outputs an alert when the measurement value obtained by the pH measuring means falls outside a predetermined pH tolerance range. [Effects of the Invention]

[0019] The turbid water treatment plant management system of the present invention has the following effects: (1) The line supplying the neutralizing agent to the turbid water can be changed by remote operation, which reduces the number of times the person in charge has to visit the turbid water treatment plant, thus reducing the burden on the person in charge. (2) By providing an alert output means, abnormalities in the water quality of treated water can be detected quickly. (3) By providing a means for creating forms, various forms that were previously created by manual input can be created automatically, thus reducing the burden on the person in charge. [Brief explanation of the drawing]

[0020] [Figure 1] A block diagram showing the configuration of the turbid water treatment plant management system of the present invention. [Figure 2]Block diagram showing the main configuration of the neutralization treatment management system of the present invention. [Figure 3] Model diagram schematically showing two neutralizing agent supply lines, an on-off valve, and a main supply pipe. [Figure 4] Model diagram showing a display screen on which a graph showing the temporal change in turbidity and the upper limit value of turbidity is displayed. [Figure 5] Flow chart showing the procedure for performing neutralization treatment of turbid water using the neutralization treatment management system of the present invention. [Figure 6] Step diagram showing the main steps for performing neutralization treatment of turbid water using the neutralization treatment management system of the present invention. [Figure 7] Flow chart showing the procedure for the alert output means to output an alert when the pH of the clarified water deviates from the pH allowable range. [Figure 8] Block diagram showing the main configuration of the purification treatment management system of the present invention. [Figure 9] Flow chart showing the procedure for performing purification treatment of turbid water using the purification treatment management system of the present invention. [Figure 10] Flow chart showing the procedure for the alert output means to output an alert when the remaining amount of the flocculant decreases. [Figure 11] Block diagram showing the main configuration of the form creation system of the present invention. [Figure 12] Form diagram showing an example of a form created by the form creation means. [Figure 13] Form diagram showing the "Daily Operation Report of the Turbid Water Treatment Plant" created by the form creation means. [Figure 14] Step diagram showing the procedure for general turbid water treatment.

Mode for Carrying Out the Invention

[0021] An example of the implementation of the turbid water treatment plant management system of the present invention will be explained with reference to the figures. Figure 1 is a block diagram showing the configuration of the turbid water treatment plant management system of the present invention. As shown in this figure, the turbid water treatment plant management system of the present invention can be configured to include a neutralization treatment management system 100, a purification treatment management system 300, and a report creation system 500. Each of these systems will be described in turn below.

[0022] 1. Neutralization Processing Management System First, the neutralization treatment management system 100 of the present invention will be described. As previously stated, turbid water discharged from the mine or batching plant is stored in a raw water tank, where its pH, SS, and turbidity are measured. Then, a neutralizing agent (such as carbon dioxide) and PAC are mixed into the turbid water that is pumped from the raw water tank through piping, and a polymer flocculant is further mixed in before it is sent to the reaction tank. In the reaction tank, the turbid water is separated into clarified water and sludge (slurry) by stirring. The clarified water is sent to the discharge tank, while the slurry is stored in a sludge storage tank, then compressed by a filter press and transported off-site as a dewatered cake. In the discharge tank, the pH, SS, and turbidity of the clarified water are measured again. If it meets the standard values, it is discharged as is, but if not, it is sent back to the raw water tank for a series of treatments. The neutralization treatment management system 100 of the present invention remotely changes the line that supplies the neutralizing agent to the turbid water.

[0023] Figure 2 is a block diagram showing the main components of the neutralization treatment management system 100 of the present invention. As shown in this figure, the neutralization treatment management system 100 is composed of a neutralizing agent supply line 101, an on / off valve 102, a main supply pipe 103, and a supply line switching means 104. It can also be further composed of a pressure gauge 105, a switching determination means 106, a switching information input means 107, a final pH measuring means 108, a raw water pH measuring means, an intermediate pH measuring means, a neutralization alert output means 109, and the like.

[0024] The supply line switching means 104, switching determination means 106, switching information input means 107, and neutralization alert output means 109 that constitute the neutralization processing management system 100 can be manufactured as dedicated components or a general-purpose computer device can be used. In other words, each means performs its own specific processing by having the computer device execute calculations according to a predetermined program. This computer device is equipped with a processor such as a CPU, memory such as ROM or RAM, and may also include input means such as a mouse or keyboard and a display. The computer device can be composed of, for example, a personal computer (PC), a server, a tablet PC such as an iPad (registered trademark), or a portable terminal device such as a smartphone.

[0025] The following will provide a detailed explanation of each of the main components that make up the neutralization processing management system 100.

[0026] (Neutralizing agent supply line) As previously described, when treating turbid water, the turbid water is first stored in a raw water tank to remove sand, debris, etc., and then neutralized so that the pH of the turbid water falls within a predetermined range of lower limit (e.g., pH 5.8) and upper limit (e.g., pH 8.6) (hereinafter referred to as the "pH tolerance range"). In this neutralization process, carbon dioxide gas, etc. (hereinafter referred to as the "neutralizing agent") is supplied to the turbid water, and the neutralizing agent supply line 101, which constitutes the neutralization treatment management system 100, is responsible for supplying the neutralizing agent to the turbid water.

[0027] Figure 3 is a schematic model diagram showing the neutralizing agent supply line 101, the on-off valve 102, the main supply pipe 103, etc. As shown in this figure, the neutralizing agent supply line 101 consists of a neutralizing agent container 110 and a sub-supply pipe 111. The neutralizing agent container 110 is filled with the neutralizing agent, and can be, for example, a carbon dioxide cylinder. Note that one neutralizing agent container 110 can be placed in one neutralizing agent supply line 101, or two or more (five in the figure) neutralizing agent containers 110 can be placed as shown in Figure 3. The sub-supply pipe 111 is connected to all the neutralizing agent containers 110 that make up the neutralizing agent supply line 101 and is a pipe that delivers the neutralizing agent from the neutralizing agent containers 110. A pressure gauge 105 can also be attached to the sub-supply pipe 111 to measure the pressure inside the sub-supply pipe 111, that is, the residual pressure in the neutralizing agent container 110.

[0028] One of the technical features of the neutralization treatment management system 100 of the present invention is that it has a spare neutralizing agent container 110 so that it can continue to supply neutralizing agent (such as carbon dioxide) even if the neutralizing agent (such as carbon dioxide) in the neutralizing agent container 110 is depleted, and that the neutralizing agent container 110 is switched automatically. Therefore, the neutralization treatment management system 100 is equipped with two or more neutralizing agent supply lines 101. When the neutralizing agent in one neutralizing agent supply line 101 is depleted, the system switches to another neutralizing agent supply line 101 to continue supplying neutralizing agent. Figure 3 shows an example equipped with two neutralizing agent supply lines 101 consisting of "line A" and "line B", but of course, it is also possible to have three or more neutralizing agent supply lines 101.

[0029] (Open / close valve) The on-off valve 102, which constitutes the neutralization treatment management system 100, is connected to all auxiliary supply pipes 111 related to the neutralizing agent supply line 101, and can open and close these auxiliary supply pipes 111. The neutralization treatment management system 100 may also be further equipped with a check valve in addition to the on-off valve 102. The on-off valve 102 opens (opens) one of the two or more auxiliary supply pipes 111 and closes (closes) all the other auxiliary supply pipes 111, and can also change (switch) which auxiliary supply pipe 111 is opened. However, the on-off valve 102 automatically opens and closes the auxiliary supply pipes 111 by remote operation, that is, it switches which auxiliary supply pipe 111 is opened by remote operation. Of course, the neutralizing agent will be supplied from the neutralizing agent supply line 101 related to the opened auxiliary supply pipe 111, and the neutralizing agent will not be supplied from the neutralizing agent supply line 101 related to the closed auxiliary supply pipe 111. For convenience, the state in which the neutralizing agent supply line 101 is supplying the neutralizing agent (i.e., the auxiliary supply pipe 111 is open) will be referred to as the "supply state," and the state in which the neutralizing agent is not being supplied (i.e., the auxiliary supply pipe 111 is closed) will be referred to as the "standby state." If the neutralizing agent supply line 101 is equipped with two or more neutralizing agent containers 110, when the neutralizing agent supply line 101 enters the supply state, the neutralizing agent will be sent from all the neutralizing agent containers 110 included in the neutralizing agent supply line 101 to the auxiliary supply pipe 111.

[0030] (Main supply pipe) The main supply pipe 103 is connected to the shut-off valve 102 and is a pipe that supplies the neutralizing agent to the turbid water. In other words, the main supply pipe 103 is connected to all the auxiliary supply pipes 111 via the shut-off valve 102, and the neutralizing agent in the neutralizing agent container 110 related to the neutralizing agent supply line 101 that is in a supply state is supplied to the turbid water from the auxiliary supply pipes 111 through the main supply pipe 103. A main shut-off valve can also be installed in the main supply pipe 103, and when this main shut-off valve is open, the neutralizing agent is supplied to the turbid water, and when the main shut-off valve is closed, the neutralizing agent is not supplied to the turbid water. This main shut-off valve, like the shut-off valve 102 of the auxiliary supply pipes 111, can also be automatically opened and closed by remote control.

[0031] (pH measurement means) The final pH measuring means 108, which constitutes the neutralization treatment management system 100, measures the pH of the clear water stored in the discharge tank. The raw water pH measuring means measures the pH of the turbid water stored in the raw water tank, and the intermediate pH measuring means measures the pH of the turbid water stored in the reaction tank. These final pH measuring means 108, the raw water pH measuring means, and the intermediate pH measuring means (hereinafter collectively referred to simply as "pH measuring means") can measure the clear water and turbid water periodically or continuously. The various tanks that store turbid water are naturally located in the turbid water treatment plant, and therefore the pH measuring means (such as the final pH measuring means 108) are also installed in the turbid water treatment plant. Therefore, to check the measured values ​​(pH) of the pH measuring means, it is necessary to go to the turbid water treatment plant, but reducing this travel time is desirable for labor-saving and manpower-saving purposes. Therefore, in the present invention, the measured values ​​obtained by the pH measuring means are transmitted as "pH data" to a location away from the turbid water treatment plant (hereinafter referred to as the "administration building" for convenience), and are further displayed on a display means such as a display (hereinafter specifically referred to as the "pH display means") located in the administration building.

[0032] As described above, the pH measuring device measures the pH of turbid water periodically (or continuously). By receiving the pH data along with the measurement time, the pH change over time can be checked on the pH display device in the management building. For example, in Figure 4, a graph showing the pH change over time and the pH tolerance range (upper and lower limits) is displayed on the pH display device.

[0033] (Supply line switching means) The supply line switching means 104, which constitutes the neutralization treatment management system 100, is a means of switching the neutralizing agent supply line 101 that is in a supply state to another neutralizing agent supply line 101 by controlling the on-off valve 102. Specifically, when the supply line switching means 104 receives a predetermined signal (hereinafter referred to as "switching information"), it performs an operation according to that switching information. That is, when the supply line switching means 104 receives switching information that includes "a neutralizing agent supply line 101 that should be in a supply state (hereinafter referred to as "designated line")", it controls the on-off valve 102, thereby closing the auxiliary supply pipe 111 of the neutralizing agent supply line 101 that was in a supply state and opening the auxiliary supply pipe 111 of the designated line. For example, when control information designating line A as the designated line is received, the auxiliary supply pipe 111 related to line A is opened and the other auxiliary supply pipes 111 are closed. Subsequently, when control information designating line B as the designated line is received, the auxiliary supply pipe 111 related to line B is opened and the other auxiliary supply pipes 111, including line A, are closed. In addition, if the neutralization treatment management system 100 has only two neutralizing agent supply lines 101, the supply line switching means 104 can be configured to receive "switching information that does not include the designated line" and simply switch from one supply line switching means 104 to the other neutralizing agent supply line 101.

[0034] When the supply line switching means 104 receives switching information, or in other words, when inputting this switching information to the supply line switching means 104, two methods can be cited: one using the switching information input means 107 and the other using the switching determination means 106. Of these, the switching information input means 107 allows the operator to input a specified line, and when a specified line is input, switching information including that specified line is generated, and this switching information is input to the supply line switching means 104. Alternatively, the switching information input means 107 can simply input switching information indicating a switch (i.e., switching information that does not include a specified line).

[0035] One of the switching determination means 106 determines whether or not to switch the neutralizing agent supply line 101 based on the remaining pressure obtained by the pressure gauge 105. If it is determined that a switch to the neutralizing agent supply line 101 is necessary, switching information is generated and this switching information is input to the supply line switching means 104. The procedure by which the switching determination means 106 determines whether or not to switch the neutralizing agent supply line 101 will be described below. When the remaining pressure of the neutralizing agent container 110 related to the neutralizing agent supply line 101 that has been put into a supply state is measured by the pressure gauge 105, the switching determination means 106 receives the remaining pressure data. The switching determination means 106 then compares a preset upper limit value (hereinafter referred to as the "remaining pressure threshold") with the remaining pressure data related to the neutralizing agent supply line 101 that has been put into a supply state, and if the remaining pressure data falls below the remaining pressure threshold, it makes a determination that a switch to the neutralizing agent supply line 101 is necessary (hereinafter referred to as the "switching required determination").

[0036] When the neutralization processing management system 100 has three or more neutralizing agent supply lines 101, the system can be configured so that the switching determination means 106 determines the "neutralizing agent supply line 101 to be opened next" when it determines that a switch is needed. In this case, one of the three or more neutralizing agent supply lines 101 is in a supply state, and the other two or more lines are in a standby state. Therefore, the switching determination means 106 determines one supply line switching means 104 from among the neutralizing agent supply lines 101 that are in a standby state. When the switching determination means 106 determines the supply line switching means 104, it can determine the neutralizing agent supply line 101 on the condition that the residual pressure of the neutralizing agent container 110 exceeds the residual pressure threshold. The switching determination means 106 receives residual pressure data for all neutralizing agent containers 110 related to the two or more neutralizing agent supply lines 101 that are in a standby state, compares that residual pressure data with the residual pressure threshold, and then determines the neutralizing agent supply line 101. Furthermore, if two or more neutralizing agent supply lines 101 exceeding the residual pressure threshold are identified, the system can be configured to select any neutralizing agent supply line 101, or to select the line with the oldest neutralizing agent container 110 installed.

[0037] (Neutralization alert output means) The neutralization alert output means 109, which constitutes the neutralization processing management system 100, is a means for outputting various alerts, and can be configured to output alerts in two ways depending on the situation (degree): "alerts for raising awareness" and "alerts for issuing warnings." For example, the neutralization alert output means 109 can output alerts according to pH data. In this case, when the neutralization alert output means 109 receives pH data from the final pH measurement means 108 or the intermediate pH measurement means, it can compare the pH tolerance range with the received pH data and output an alert when the pH data falls outside the pH tolerance range.

[0038] (Example of use) Referring to Figures 5 and 6, an example of neutralizing turbid water using the neutralization treatment management system 100 of the present invention will be described. Figure 5 is a flowchart showing the procedure for neutralizing turbid water using the neutralization treatment management system 100 of the present invention, and Figure 6 is a step-by-step diagram. In Figure 5, the steps shown by dashed lines are performed by an operator. For convenience, the neutralization treatment management system 100 will be described here in an example that includes two neutralizing agent supply lines 101 consisting of "Line A" and "Line B".

[0039] As shown in Figure 6(a), first, the neutralizing agent supply lines 101 for line A and line B are positioned with the neutralizing agent containers 110 filled to capacity. The auxiliary supply pipe 111 for line A is opened, that is, line A is kept in a supply state. When turbid water is stored in the raw water tank, the main valve is opened to supply the neutralizing agent from the auxiliary supply pipe 111 of line A to the main supply pipe 103 (Step 201 in Figure 5). The pressure gauge 105 periodically (or continuously) measures the residual pressure in the neutralizing agent container 110 for line A, and if the residual pressure exceeds the residual pressure threshold (Yes in Step 202 in Figure 5), the supply state of line A is maintained and the standby state of line B is maintained, as shown in Figure 6(b).

[0040] On the other hand, as shown in Figure 6(c), when the residual pressure in the neutralizing agent container 110 related to line A falls below the residual pressure threshold (No. in Step 202 of Figure 5), the supply line switching means 104 controls the on-off valve 102 to put line B into a supply state and line A into a standby state, as shown in Figure 6(d) (Step 203 of Figure 5). For example, when an operator inputs switching information into the switching information input means 107, that switching information is input to the supply line switching means 104. Alternatively, the switching determination means 106 performs a "switching required determination" according to the remaining amount in line A, and the switching information is input to the supply line switching means 104. When the supply line switching means 104 receives the switching information, it controls the on-off valve 102, which opens the auxiliary supply pipe 111 related to line B and closes the auxiliary supply pipe 111 related to line A. Also, as shown in Figure 6(d), the empty neutralizing agent container 110 for line A is replaced with a filled neutralizing agent container 110 (Step 204 in Figure 5).

[0041] When new turbid water is stored in the raw water tank, the main valve is opened to supply the neutralizing agent from the secondary supply pipe 111 of line B through the main supply pipe 103 to the main supply pipe 103 (Step 205 in Figure 5). The pressure gauge 105 periodically (or continuously) measures the residual pressure of the neutralizing agent container 110 related to line B, and if the residual pressure exceeds the residual pressure threshold (Yes in Step 206 in Figure 5), the supply state of line B is maintained and the standby state of line A is maintained, as shown in Figure 6(f).

[0042] On the other hand, as shown in Figure 6(g), when the residual pressure in the neutralizing agent container 110 for line B falls below the residual pressure threshold (No. in Step 206 of Figure 5), the supply line switching means 104 controls the on / off valve 102 to put line A into a supply state and line B into a standby state, as shown in Figure 6(h) (Step 207 of Figure 5). Also, as shown in Figure 6(h), the empty neutralizing agent container 110 for line B is replaced with a filled neutralizing agent container 110 (Step 208 of Figure 5).

[0043] Figure 7 is a flowchart showing the procedure for the neutralization alert output means 109 to output an alert. As shown in this figure, first the pH of the turbid water stored in the raw water tank is measured by the raw water pH measuring means (Step 211 in Figure 7). Then, when the turbid water is pumped from the raw water tank to the reaction tank through piping (Step 212 in Figure 7), the pH in the reaction tank is measured by the intermediate pH measuring means (Step 213 in Figure 7). At this time, if the pH of the turbid water in the reaction tank is within the pH tolerance range (Yes in Step 214 in Figure 7), it is transferred directly to the discharge tank (Step 216 in Figure 7). On the other hand, if the pH is outside the pH tolerance range (No in Step 214 in Figure 7), a neutralizing agent is supplied to the reaction tank (Step 215 in Figure 7), and then it is transferred to the discharge tank (Step 216 in Figure 7). In cases where an intermediate pH measuring device is not provided in the reaction tank, the system can be configured so that when turbid water is pumped from the raw water tank (Step 212 in Figure 7), this acts as a trigger to automatically supply the neutralizing agent to the reaction tank.

[0044] Once the clarified water is stored in the discharge tank, the pH is measured by the final pH measuring means 108 (Step 217 in Figure 7). If the pH falls within the acceptable pH range (Yes in Step 218 in Figure 7), the water is discharged as is. On the other hand, if the pH falls outside the acceptable pH range (No in Step 218 in Figure 7), a predetermined alert is output by the neutralization alert output means 109 (Step 219 in Figure 7), the clarified water is returned to the raw water tank as turbid water, and the series of neutralization treatments (Steps 211 to 218) are performed again.

[0045] 2. Purification Treatment Management System Next, the purification treatment management system 300 of the present invention will be described. The purification treatment management system 300 sets the amount of PAC and polymer flocculant to be added according to the SS and turbidity of the turbid water measured in the raw water tank. Figure 8 is a block diagram showing the main configuration of the purification treatment management system 300 of the present invention. As shown in this figure, the purification treatment management system 300 is configured to include a flocculant addition means 301, an output adjustment means 302, an addition amount setting means 303, and a raw water turbidity measurement means 304. It can also be configured to include a final turbidity measurement means 305, an intermediate turbidity measurement means 310, a flocculant remaining amount estimation means 306, a flocculant remaining amount display means 307, a purification alert output means 308, a liquid level measurement means 309, and so on.

[0046] The output adjustment means 302, the additive amount setting means 303, the coagulant remaining amount estimation means 306, and the purification alert output means 308 that constitute the purification treatment management system 300 can be manufactured as dedicated components or a general-purpose computer device can be used. In other words, each means performs its own specific processing by having the computer device execute calculations according to a predetermined program. This computer device is equipped with a processor such as a CPU, memory such as ROM or RAM, and may also include input means such as a mouse or keyboard and a display. The computer device can be composed of, for example, a personal computer (PC), a server, a tablet PC such as an iPad (registered trademark), or a portable terminal device such as a smartphone. If the computer device includes a display, this display can also be used as the coagulant remaining amount display means 307.

[0047] The following will provide a detailed explanation of each of the main components that make up the 300 wastewater treatment management system.

[0048] (Measurement means for turbidity, etc.) The raw water turbidity and other properties measuring means 304, which constitute the water purification system 300, measures the turbidity and suspended solids (SS) (hereinafter referred to as "turbidity, etc.") of the turbid water stored in the raw water tank. The intermediate turbidity and other properties measuring means 310 measures the turbidity and other properties of the turbid water stored in the reaction tank, and the final turbidity and other properties measuring means 305 measures the turbidity and other properties of the clarified water stored in the discharge tank. These raw water turbidity and other properties measuring means 304, the intermediate turbidity and other properties measuring means 310, and the final turbidity and other properties measuring means 305 (hereinafter collectively referred to simply as "turbidity and other properties measuring means") can measure either turbidity or SS, or they can measure both turbidity and SS. The turbidity and other properties measuring means can measure turbid water and clarified water periodically or continuously.

[0049] Naturally, the various tanks for storing turbid water are located in the turbid water treatment plant, and therefore, turbidity measurement devices (such as the raw water turbidity measurement device 304) are also installed in the turbid water treatment plant. As a result, it is necessary to go to the turbid water treatment plant to check the measured values ​​(turbidity, etc.) from the turbidity measurement device, but it is desirable to reduce this travel time in order to save labor and manpower. Therefore, in the present invention, the measured values ​​obtained by the turbidity measurement device are transmitted to the control building as "turbidity data," and further displayed on a display device such as a display (hereinafter referred to as "turbidity display device") located in the control building. This turbidity data is also transmitted to the additive amount setting device 303, which will be described later.

[0050] As described above, the turbidity measurement device measures the turbidity of turbid water periodically (or continuously). By receiving the turbidity data along with the measurement time, the time-dependent changes in turbidity can be confirmed on the turbidity display device in the management building. For example, in Figure 4, a graph showing the time-dependent changes in turbidity and the upper limit of turbidity is displayed on the turbidity display device.

[0051] (Method of adding a flocculant) As previously described, when treating turbid water, the turbid water is first stored in a raw water tank to remove sand, debris, etc., and then purified so that the turbidity and SS (suspended solids) meet the standard values. In this purification process, an inorganic coagulant such as PAC (polyaluminum chloride) is added to the turbid water to form fine flocs, and then a polymer coagulant is added to the turbid water to convert the fine flocs into coarse flocs. The coagulant adding means 301, which constitutes the purification treatment management system 300, is responsible for adding PAC and polymer coagulants (hereinafter collectively referred to simply as "coagulants") to the turbid water.

[0052] The coagulant adding means 301 is such that the power required to add the coagulant changes according to the frequency (hereinafter, especially referred to as "output frequency"). In other words, the amount of coagulant added can be adjusted by changing the output frequency. The coagulant adding means 301 automatically adds the coagulant when turbid water is pumped from the raw water tank, in other words, the pumping of turbid water acts as a trigger.

[0053] (addition amount setting means) The additive amount setting means 303, which constitutes the wastewater treatment management system 300, is a means for setting the amount of coagulant to be added by the coagulant adding means 301 (hereinafter referred to as the "appropriate amount of addition") according to the turbidity, etc. measured by the raw water turbidity, etc. measuring means 304. When the additive amount setting means 303 sets the appropriate amount of addition, there are two methods: setting it according to the input value by the operator and setting it automatically. In the operator method, the manager or other person determines the appropriate amount of addition based on the turbidity, etc. Specifically, the manager or other person checks the turbidity, etc. data transmitted from the raw water turbidity, etc. measuring means 304 and determines an appropriate amount of addition, and the additive amount setting means 303 sets the amount of addition entered by the operator as the appropriate amount of addition.

[0054] On the other hand, in the automatic setting method, the appropriate amount to be added is set according to turbidity data, etc. The procedure for the addition amount setting means 303 to automatically set the appropriate amount to be added is described below. When turbidity data obtained by the raw water turbidity measurement means 304 is transmitted, the addition amount setting means 303 receives this turbidity data. The addition amount setting means 303 then compares the received turbidity data with a pre-set "appropriate addition amount table" and sets the appropriate amount to be added corresponding to the turbidity data. Here, the appropriate addition amount table is a table that shows the relationship between the appropriate amount to be added and the turbidity data, etc., and is a correspondence table in which the turbidity data is divided into various ranges and the appropriate amount to be added is set for each range. Alternatively, instead of the specification of comparing the appropriate addition amount table with the turbidity data, etc., it is also possible to use an "appropriate addition amount function" to determine the appropriate amount to be added. In this case, an appropriate addition amount function is set in advance with turbidity data as the explanatory variable and the appropriate amount to be added as the dependent variable, and the value obtained by inputting the received turbidity data into the appropriate addition amount function is set as the appropriate amount to be added.

[0055] The additive amount setting means 303 can be located in the administration building, in the turbid water treatment plant, or configured using a mobile device such as a tablet PC or smartphone. The appropriate additive amount set by the additive amount setting means 303 is sent to the output adjustment means 302 as a predetermined signal (hereinafter referred to as "control information"). This control information can be generated as a signal containing only the appropriate additive amount, or as a signal containing the appropriate additive amount in addition to other information.

[0056] (output adjustment means) The output adjustment means 302, which constitutes the wastewater treatment management system 300, is a means for adjusting the amount of coagulant added by the coagulant adding means 301 by controlling the output frequency of the coagulant adding means 301. Specifically, when the output adjustment means 302 receives control information including the appropriate amount to add, it controls the output frequency of the coagulant adding means 301, thereby causing the coagulant adding means 301 to add the appropriate amount of coagulant.

[0057] (Method for estimating the amount of flocculant remaining) The coagulant is stored in a designated storage tank (hereinafter referred to as the "coagulant tank"), and the coagulant adding means 301 adds the coagulant from this coagulant tank to the turbid water. As the amount of coagulant remaining in the coagulant tank decreases according to the amount added by the coagulant adding means 301, the coagulant must be replenished in the coagulant tank when a certain amount remains. Checking the remaining amount of coagulant requires going to the turbid water treatment plant, but it is desirable to reduce this travel time in order to save labor and reduce manpower. Also, if the replenishment of coagulant is delayed, there is a risk that the addition of coagulant will be interrupted, so it is desirable to be able to check the remaining amount of coagulant in the coagulant tank in real time.Therefore, in the present invention, a liquid level measuring means 309 is placed in the coagulant tank, and the measured value obtained by this liquid level measuring means 309 is transmitted to the control building as "liquid level data", and further displayed on a coagulant remaining amount display means 307 located in the control building. The liquid level measuring means 309 measures the liquid level of the coagulant in the coagulant tank, and various conventionally used devices can be utilized. Furthermore, the coagulant remaining amount display means 307 and the turbidity display means can be combined into a single display.

[0058] The coagulant remaining amount estimation means 306, which constitutes the purification treatment management system 300, is a means for receiving liquid level data and estimating the remaining amount of coagulant in the coagulant tank based on that liquid level data. Furthermore, once the coagulant remaining amount estimation means 306 estimates the remaining amount, it can also be specified to generate that value as "estimated remaining amount data". Here, the remaining amount can be the liquid level height related to the liquid level data, or it can be the value obtained by multiplying the internal area of ​​the coagulant tank by the liquid level height. In addition, if the liquid level measuring means 309 is specified to periodically (or continuously) measure the liquid level height of the coagulant and transmit the liquid level data along with the measurement time, the coagulant remaining amount estimation means 306 can generate estimated remaining amount data for each time period, and furthermore, a graph showing the change in the remaining amount over time, along with the lower limit of the remaining amount (hereinafter referred to as the "remaining amount threshold"), can be displayed on the coagulant remaining amount display means 307. The coagulant remaining amount estimation means 306 can be installed in the administration building, in the turbid water treatment plant, or it can be configured using a mobile device such as a tablet PC or smartphone.

[0059] (Mechanism for outputting an alert for purification) The purification alert output means 308, which constitutes the purification treatment management system 300, is a means for outputting various alerts, and can be configured to output alerts divided into "alerts for raising awareness" and "alerts for issuing warnings" depending on the situation (degree). For example, the purification alert output means 308 can output alerts according to turbidity data. In this case, when the purification alert output means 308 receives turbidity data from the final turbidity measurement means 305 or the intermediate turbidity measurement means 310, it can compare the received turbidity data with a predetermined upper limit value for turbidity (turbidity and SS) (hereinafter referred to as the "turbidity threshold"), and can be configured to output an alert when the turbidity data exceeds the turbidity threshold.

[0060] Furthermore, the purification alert output means 308 can output an alert according to the remaining amount of coagulant. In this case, when the purification alert output means 308 receives estimated remaining amount data from the coagulant remaining amount estimation means 306, it compares the received estimated remaining amount data with a predetermined remaining amount threshold and outputs an alert when the estimated remaining amount data falls below the remaining amount threshold.

[0061] (Example of use) Referring to Figures 9 and 10, an example of purifying turbid water using the purification treatment management system 300 of the present invention will be described. As shown in Figure 9, first, the turbidity of the turbid water stored in the raw water tank is measured by the raw water turbidity measurement means 304 (Step 401 in Figure 9). Once the turbidity of the turbid water is obtained, the appropriate amount to be added according to the turbidity is set using the addition amount setting means 303 (Step 402 in Figure 9), and control information including the appropriate amount to be added is transmitted to the output adjustment means 302.

[0062] When the output adjustment means 302 receives control information, it adjusts the output frequency of the coagulant adding means 301 to add the appropriate amount (Step 403 in Figure 9), and then the coagulant adding means 301 adds the coagulant (Step 404 in Figure 9). When the clarified water is stored in the discharge tank, the turbidity and other parameters are measured by the final turbidity measurement means 305 (Step 405 in Figure 9), and if the turbidity and other parameters are below the turbidity threshold, the water is discharged as is (Yes in Step 406 in Figure 9). On the other hand, if the turbidity and other parameters exceed the turbidity threshold (No in Step 406 in Figure 9), a predetermined alert is output by the purification alert output means 308 (Step 407 in Figure 9), the clarified water is returned to the raw water tank as turbid water, and the series of purification processes (Steps 401 to 406) are performed again.

[0063] Furthermore, the liquid level measuring means 309 periodically (or continuously) measures the liquid level and transmits the liquid level data (Step 411 in Figure 10). The coagulant remaining amount estimation means 306, having received the liquid level data, estimates the remaining amount of coagulant in the coagulant tank based on the liquid level data (Step 412 in Figure 10), and a graph showing the change in the remaining amount over time is displayed on the coagulant remaining amount display means 307.

[0064] The estimated remaining amount data from the coagulant remaining amount estimation means 306 is periodically compared with the remaining amount threshold. If the estimated remaining amount exceeds the remaining amount threshold (Yes in Step 413 of Figure 10), the coagulant addition means 301 continues to add coagulant. On the other hand, if the estimated remaining amount falls below the remaining amount threshold (No in Step 413 of Figure 10), a predetermined alert is output by the purification alert output means 308 (Step 414 of Figure 10), and coagulant is replenished in the coagulant tank (Step 415 of Figure 10). This replenishment process is performed by an operator.

[0065] 3. Document creation system Next, the document creation system 500 of the present invention will be described. Figure 11 is a block diagram showing the main components of the document creation system 500 of the present invention. As shown in this figure, the document creation system 500 is composed of a document creation means 501 and a data storage means 502. Of these, the document creation means 501 can be manufactured as a dedicated unit, or a general-purpose computer device can be used. That is, the processing of the document creation means 501 is carried out by having the computer device perform calculation processing according to a predetermined program. This computer device is equipped with a processor such as a CPU, memory such as ROM or RAM, and may also include input means such as a mouse or keyboard and a display. The computer device can be composed of, for example, a personal computer, a server, a tablet PC such as iPad®, or a portable terminal device such as a smartphone.

[0066] Furthermore, the data storage means 502 can utilize the storage device of a general-purpose computer (for example, a personal computer), or it can be built on a database server. When built on a database server, it can be located on a local network (LAN: Local Area Network), or it can be a cloud server that stores data via the internet.

[0067] The following provides a detailed explanation of each component of the document creation system 500.

[0068] (Data storage means) The data storage means 502 stores various data generated in the turbid water treatment plant (hereinafter collectively referred to as "plant data"). This plant data includes data on turbidity, etc. (turbidity and SS) measured by turbidity measurement means (raw water turbidity measurement means 304, etc.) (hereinafter referred to as "turbidity measurement data"), data on the amount of coagulant added (hereinafter referred to as "actual addition amount data"), pH data measured by pH measurement means (final pH measurement means 108, etc.) (hereinafter referred to as "pH measurement data"), and data on the amount of neutralizing agent supplied (hereinafter referred to as "actual supply amount data"). Furthermore, various data can be used as plant data, including estimated remaining amount data obtained by the coagulant remaining amount estimation means 306, control data by the output adjustment means 302, control data by the supply line switching means 104, alert data output by the purification alert output means 308 and the neutralization alert output means 109, data on replenishing coagulant and replacing the neutralizing agent container 110, data on the number of times and quantity of dewatered cake produced by compression dewatering with a filter press, and data on turbid water. Of these, the actual amount of coagulant added can be determined based on the estimated remaining amount data by the coagulant remaining amount estimation means 306. On the other hand, the actual amount of neutralizing agent supplied can be estimated as the amount of neutralizing agent that filled the neutralizing agent container 110 related to the neutralizing agent supply line 101, which was opened once and then closed by the supply line switching means 104. This plant data is then stored in the data storage means 502 along with the relevant time (measurement time, usage time, output time, processing time, etc.). Furthermore, if the data obtained by each measuring instrument is analog data, it is converted to digital data and then stored in the data storage means 502.

[0069] (Method for creating forms) The report creation means 501 is a means for reading necessary plant data from the data storage means 502 and creating various reports. For example, the report creation means 501 can read turbidity measurement data and actual coagulant addition amount data from the data storage means 502 and create a "purification treatment report" that shows turbidity measurement data for each measurement time and actual addition amount data for each addition time. Alternatively, it can read pH measurement data and actual neutralizing agent supply amount data from the data storage means 502 and create a "neutralization treatment report" that shows pH measurement data for each measurement time and actual supply amount data for each supply time.

[0070] Figure 12 shows an example of a report created by the report creation means 501. The report shown in this figure displays the amounts of turbid water and clarified water, PAC and polymers, carbon dioxide (remaining amount, amount used, amount used per unit of turbid water, amount received), and the number of times and quantity of dewatered cake produced, at regular time intervals. Figure 13 shows a "Daily Operation Report of the Turbid Water Treatment Plant" created by the report creation means 501. In this way, the report creation means 501 can read various combinations of plant data from the data storage means 502 and create various reports. [Industrial applicability]

[0071] The turbid water treatment plant management system of the present invention can be used at various construction sites where turbid water is generated, including tunnel excavation work. Considering that the present invention allows for the efficient execution of civil engineering works, and consequently the efficient construction of infrastructure such as roads and railways, it is an invention that can be expected to make a significant contribution not only to industry but also to society. [Explanation of symbols]

[0072] 100 Neutralization Processing Management System of the Present Invention 101 (Neutralizing agent supply line of the neutralization process management system) 102 (Neutralization treatment management system) On / off valve 103 Main supply pipe (of the neutralization treatment management system) 104 Supply line switching means (of the neutralization processing management system) 105 (Pressure gauge for neutralization process management system) 106 Switching determination means (of the neutralization processing management system) 107 (Switching information input means for neutralization processing management system) 108 (Method for measuring the final pH of a neutralization treatment management system) 109 Neutralization alert output means (of the neutralization processing management system) 110 (Neutralizing agent container 306 of the neutralization treatment management system) 111 (Auxiliary supply pipe of the neutralization treatment management system) 300 Purification treatment management system of the present invention 301 Coagulant Addition Method (of a sanitation treatment management system) 302 Output adjustment means (of the purification treatment management system) 303 (Means for setting the amount of additives in the purification treatment management system) 304 Means for measuring raw water turbidity, etc. (of a water purification treatment management system) 305 (Method for measuring final turbidity, etc., of a purification treatment management system) 306 (Means for estimating the remaining amount of coagulant in a waste treatment management system) 307 (Means for displaying the remaining amount of coagulant in a waste treatment management system) 308 (Purification alert output means of the purification treatment management system) 309 Liquid level measuring means (of a purification treatment management system) 310 (Means for measuring intermediate turbidity, etc., of a purification treatment management system) 500 Document creation system of the present invention 501 (Method of creating a form in a form creation system) Form creation means 502 Data storage means (of the form creation system)

Claims

1. A system for managing a turbid water treatment plant, A neutralizing agent supply line comprising one or more neutralizing agent containers filled with a neutralizing agent, and two or more auxiliary supply pipes connected to the neutralizing agent containers, A shut-off valve connected to each of the auxiliary supply pipes relating to two or more of the neutralizing agent supply lines, The main supply pipe connected to the aforementioned on-off valve, The system includes a supply line switching means for controlling the opening and closing of the auxiliary supply pipe by the on-off valve, The aforementioned on-off valve opens only one of the two or more aforementioned auxiliary supply pipes and connects it to the main supply pipe. Furthermore, upon receiving switching information, the supply line switching means controls the on / off valve to close the open auxiliary supply pipe and open the other auxiliary supply pipes to connect them to the main supply pipe. The neutralizing agent in the neutralizing agent container is supplied to the turbid water from the auxiliary supply pipe through the main supply pipe. A turbid water treatment plant management system characterized by the following features.

2. A pressure gauge for measuring the remaining pressure in the neutralizing agent container, The system further includes a switching determination means that generates switching information when the residual pressure of the neutralizing agent container related to the open neutralizing agent supply line falls below a predetermined residual pressure threshold, The supply line switching means receives the switching information generated by the switching determination means. A turbid water treatment plant management system according to claim 1, characterized in that it is a turbid water treatment plant management system.

3. The system further includes a switching information input means for the operator to select the neutralizing agent supply line and input the switching information, The supply line switching means receives the switching information input by the switching information input means, opens the auxiliary supply pipe of the neutralizing agent supply line related to the switching information, and connects it to the main supply pipe. A turbid water treatment plant management system according to claim 1, characterized in that it is a turbid water treatment plant management system.

4. A pH measuring means for measuring the pH of turbid or clear water, A data storage means that stores measurement data measured by the pH measuring means and data on the actual amount of the neutralizing agent supplied, along with the time. The system includes a report creation means that creates a neutralization processing report representing the measurement data and the actual supply amount data for each time period, based on the measurement data and the actual supply amount data read from the data storage means, The actual supply amount data is the amount of neutralizing agent that filled the neutralizing agent container related to the auxiliary supply pipe, which was opened once and then closed by the supply line switching means. A turbid water treatment plant management system according to claim 1, characterized in that it is a turbid water treatment plant management system.

5. A pH measuring device for measuring the pH of the clear water in the discharge tank, It includes an alert output means for outputting an alert, The alert output means outputs the alert when the measurement value obtained by the pH measuring means falls outside a predetermined pH tolerance range. A turbid water treatment plant management system according to claim 1, characterized in that it is a turbid water treatment plant management system.

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