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 a raw water turbidity measurement means, an additive amount setting means, a coagulant additive means, and an output adjustment means. Of these, the additive amount setting means is a means for setting an appropriate additive amount according to the turbidity and SS measured by the raw water turbidity measurement means. The additive amount setting means sends control information, including the appropriate additive amount, to the output adjustment means. Upon receiving the control information, the output adjustment means adjusts the output frequency of the coagulant additive means so as to add the coagulant at the appropriate amount.

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 or the like. More specifically, it relates to a turbid water treatment plant management system capable of remotely adjusting the amount of flocculant added 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 the inside of the natural ground. The tunnel method generally tends to have a higher construction cost (construction cost per unit length of roads, etc.) compared to the excavation method. On the other hand, it also tends to have less excavated soil volume (i.e., the amount of waste soil) compared to the excavation method, and has the feature that the degree of freedom in the linear planning of roads, etc. is high (for example, it can take shortcuts). 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 combined 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 to 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 project] [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 adjusting the amount of coagulant added by remote control according to the turbidity and suspended solids (SS) of the turbid water, and is an invention based on a completely new idea.

[0014] The turbidity treatment plant management system of the present invention is a system for managing a turbidity treatment plant and comprises a raw water turbidity measurement means, an additive amount setting means, a coagulant additive means, and an output adjustment means. Of these, the raw water turbidity measurement means is a means for measuring the turbidity and suspended solids (SS) of the turbidity stored in the raw water tank, and the additive amount setting means is a means for setting an appropriate additive amount according to the turbidity and SS measured by the raw water turbidity measurement means. The coagulant additive means is a means for adding a coagulant, and the output adjustment means is a means for adjusting the coagulant addition process by the coagulant additive means. The additive amount setting means sends control information, including the appropriate additive amount, to the output adjustment means. Upon receiving the control information, the output adjustment means adjusts the output frequency of the coagulant additive means to add the coagulant at the appropriate amount.

[0015] The turbid water treatment plant management system of the present invention may also be equipped with an additive amount setting means that sets an appropriate additive amount based on a predetermined relationship between turbidity, suspended solids (SS), and the appropriate additive amount.

[0016] The turbid water treatment plant management system of the present invention may also be equipped with an additive amount setting means that sets the additive amount input by the operator as the appropriate additive amount.

[0017] The turbid water treatment plant management system of the present invention may further include a remaining amount estimation means and a remaining amount display means. The remaining amount estimation means is a means for estimating the remaining amount of coagulant by measuring the liquid level of the coagulant contained in a container. The remaining amount display means is a means for receiving and displaying the remaining amount of coagulant estimated by the remaining amount estimation means.

[0018] The turbidity treatment plant management system of the present invention may further include a means for measuring turbidity, a data storage means, and a report creation means. The data storage means is a means for storing "measurement data" measured by the turbidity measurement means and "actual amount data" of coagulant added by the coagulant addition means, along with the time. The report creation means is a means for creating a purification treatment report that shows the measurement data and actual amount data for each time period, based on the measurement data and actual amount data read from the data storage means.

[0019] The turbidity treatment plant management system of the present invention may further include a turbidity measurement means and an alert output means for outputting an alert. The alert output means outputs an alert when the measurement value obtained by the turbidity measurement means exceeds a predetermined turbidity threshold.

[0020] The turbid water treatment plant management system of the present invention may further include a remaining amount estimation means and an alert output means. In this case, the alert output means outputs an alert when the remaining amount of coagulant estimated by the remaining amount estimation means falls below a predetermined remaining amount threshold. [Effects of the Invention]

[0021] The turbid water treatment plant management system of the present invention has the following effects: (1) The amount of coagulant added can be adjusted remotely, 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 a means for estimating the remaining amount, the remaining amount of coagulant contained in the container can be determined even in locations far from the turbid water treatment plant, such as a management office. This eliminates the need to go to the turbid water treatment plant to check the remaining amount and allows for the replenishment of the coagulant at the appropriate time. (3) By providing an alert output means, abnormalities in the treated water quality can be detected quickly, and treatment stoppages due to a shortage of coagulant can be prevented. By providing a document creation means, various documents that were conventionally created manually can be automatically created, that is, the burden on the person in charge can be reduced.

Brief Explanation of Drawings

[0022] [Figure 1] 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 purification treatment management system of the present invention. [Figure 3] 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 4] Flow chart showing the procedure for performing the purification treatment of turbid water using the purification treatment management system of the present invention. [Figure 5] Flow chart showing the procedure for the alert output means to output an alert when the remaining amount of the flocculant decreases. [Figure 6] Block diagram showing the main configuration of the neutralization treatment management system of the present invention. [Figure 7] Model diagram schematically showing two neutralizing agent supply lines, a shut-off valve, and a main supply pipe. [Figure 8] Flow chart showing the procedure for performing the neutralization treatment of turbid water using the neutralization treatment management system of the present invention. [Figure 9] Step diagram showing the main steps for performing the neutralization treatment of turbid water using the neutralization 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 pH of the clarified water deviates from the pH allowable range. [Figure 11] Block diagram showing the main configuration of the document creation system of the present invention. [Figure 12] Document diagram showing an example of a document created by the document creation means. [Figure 13] Document diagram showing the "Daily Operation Report of the Turbid Water Treatment Plant" created by the document creation means. [Figure 14] Step diagram showing the procedure for general turbid water treatment. [Modes for carrying out the invention]

[0023] 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 purification treatment management system 100, a neutralization treatment management system 300, and a report creation system 500. Each of these systems will be described in turn below.

[0024] 1. Purification Treatment Management System First, the purification treatment management system 100 of the present invention will be described. As previously stated, turbid water discharged from the mine and 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 added to the turbid water that is pumped from the raw water tank through piping, and a polymer flocculant is added before it is sent to a 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 a 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 the values ​​meet the standards, it is discharged as is, but if not, it is sent back to the raw water tank for further processing. The purification treatment management system 100 of the present invention sets the amount of PAC and polymer flocculant added according to the SS and turbidity of the turbid water measured in the raw water tank.

[0025] Figure 2 is a block diagram showing the main components of the water purification management system 100 of the present invention. As shown in this figure, the water purification management system 100 is configured to include a coagulant addition means 101, an output adjustment means 102, an addition amount setting means 103, and a raw water turbidity measurement means 104. It can also be configured to include a final turbidity measurement means 105, an intermediate turbidity measurement means 110, a coagulant remaining amount estimation means 106, a coagulant remaining amount display means 107, a water purification alert output means 108, a liquid level measurement means 109, and the like.

[0026] The output adjustment means 102, the additive amount setting means 103, the coagulant remaining amount estimation means 106, and the purification alert output means 108 that constitute the purification treatment 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. If the computer device includes a display, this display can also be used as the coagulant remaining amount display means 107.

[0027] The following will provide a detailed explanation of each of the main components that make up the wastewater treatment management system 100.

[0028] (Measurement means for turbidity, etc.) The raw water turbidity and other properties measuring means 104, which constitute the water purification system 100, 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 110 measures the turbidity and other properties of the turbid water stored in the reaction tank, and the final turbidity and other properties measuring means 105 measures the turbidity and other properties of the clarified water stored in the discharge tank. These raw water turbidity and other properties measuring means 104, the intermediate turbidity and other properties measuring means 110, and the final turbidity and other properties measuring means 105 (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 the turbid water and clarified water periodically or continuously.

[0029] Various tanks for storing turbid water are naturally located in the turbid water treatment plant, and therefore, turbidity measurement devices (such as the raw water turbidity measurement device 104) 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 as "turbidity data" to a location away from the turbid water treatment plant (hereinafter referred to as the "management building" for convenience), and further displayed on a display device such as a display (hereinafter specifically referred to as the "turbidity display device") located in the management building. This turbidity data is also transmitted to the additive amount setting device 103, which will be described later.

[0030] 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 3, a graph showing the time-dependent changes in turbidity and the upper limit of turbidity is displayed on the turbidity display device.

[0031] (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 101, which constitutes the purification treatment management system 100, is responsible for adding PAC and polymer coagulants (hereinafter collectively referred to simply as "coagulants") to the turbid water.

[0032] The coagulant adding means 101 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 101 automatically adds the coagulant when turbid water is pumped from the raw water tank, in other words, triggered by the pumping of turbid water.

[0033] (addition amount setting means) The additive amount setting means 103, which constitutes the wastewater treatment management system 100, is a means for setting the amount of coagulant to be added by the coagulant adding means 101 (hereinafter referred to as the "appropriate amount of additive") according to the turbidity, etc. measured by the raw water turbidity, etc. measuring means 104. When the additive amount setting means 103 sets the appropriate amount of additive, 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 additive 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 104 and determines an appropriate amount of additive, and the additive amount setting means 103 sets the amount of additive entered by the operator as the appropriate amount of additive.

[0034] 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 103 to automatically set the appropriate amount to be added is described below. When turbidity data obtained by the raw water turbidity measurement means 104 is transmitted, the addition amount setting means 103 receives this turbidity data. The addition amount setting means 103 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.

[0035] The additive amount setting means 103 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 103 is sent to the output adjustment means 102 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.

[0036] (output adjustment means) The output adjustment means 102, which constitutes the wastewater treatment management system 100, is a means for adjusting the amount of coagulant added by the coagulant adding means 101 by controlling the output frequency of the coagulant adding means 101. Specifically, when the output adjustment means 102 receives control information including the appropriate amount to add, it controls the output frequency of the coagulant adding means 101, thereby causing the coagulant adding means 101 to add the appropriate amount of coagulant.

[0037] (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 101 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 101, 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 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 109 is placed in the coagulant tank, and the measured value obtained by this liquid level measuring means 109 is transmitted to the control building as "liquid level data", and further displayed on a coagulant remaining amount display means 107 located in the control building. The liquid level measuring means 109 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 107 and the turbidity display means can be combined into a single display.

[0038] The coagulant remaining amount estimation means 106, which constitutes the wastewater treatment management system 100, 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 106 estimates the remaining amount, it can be configured 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. Additionally, if the liquid level measuring means 109 measures the liquid level height of the coagulant periodically (or continuously) and transmits the liquid level data along with the measurement time, the coagulant remaining amount estimation means 106 can generate estimated remaining amount data for each time period. Furthermore, a graph showing the time change of the remaining amount, along with a lower limit of the remaining amount (hereinafter referred to as the "remaining amount threshold"), can be displayed on the coagulant remaining amount display means 107. The coagulant remaining amount estimation means 106 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.

[0039] (Mechanism for outputting an alert for purification) The purification alert output means 108, which constitutes the purification treatment management system 100, 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 108 can output alerts according to turbidity data. In this case, when the purification alert output means 108 receives turbidity data from the final turbidity measurement means 105 or the intermediate turbidity measurement means 110, 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 output an alert when the turbidity data exceeds the turbidity threshold.

[0040] Furthermore, the purification alert output means 108 can output an alert according to the remaining amount of coagulant. In this case, when the purification alert output means 108 receives estimated remaining amount data from the coagulant remaining amount estimation means 106, 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.

[0041] (Example of use) Referring to Figures 4 and 5, an example of purifying turbid water using the purification treatment management system 100 of the present invention will be described. As shown in Figure 4, first, the turbidity of the turbid water stored in the raw water tank is measured by the raw water turbidity measurement means 104 (Step 201 in Figure 4). 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 103 (Step 202 in Figure 4), and control information including the appropriate amount to be added is transmitted to the output adjustment means 102.

[0042] When the output adjustment means 102 receives control information, it adjusts the output frequency of the coagulant adding means 101 to add the appropriate amount (Step 203 in Figure 4), and then the coagulant adding means 101 adds the coagulant (Step 204 in Figure 4). When the clarified water is stored in the discharge tank, the turbidity and other parameters are measured by the final turbidity measurement means 105 (Step 205 in Figure 4), and if the turbidity and other parameters are below the turbidity threshold, the water is discharged as is (Yes in Step 206 in Figure 4). On the other hand, if the turbidity and other parameters exceed the turbidity threshold (No in Step 206 in Figure 4), a predetermined alert is output by the purification alert output means 108 (Step 207 in Figure 4), the clarified water is returned to the raw water tank as turbid water, and the series of purification processes (Steps 202 to 206) are performed again.

[0043] Furthermore, the liquid level measuring means 109 periodically (or continuously) measures the liquid level and transmits the liquid level data (Step 211 in Figure 5). The coagulant remaining amount estimation means 106, upon receiving the liquid level data, estimates the remaining amount of coagulant in the coagulant tank based on the liquid level data (Step 212 in Figure 5), and a graph showing the change in the remaining amount over time is displayed on the coagulant remaining amount display means 107.

[0044] The estimated remaining amount data from the coagulant remaining amount estimation means 106 is periodically compared with the remaining amount threshold. If the estimated remaining amount exceeds the remaining amount threshold (Yes in Step 213 of Figure 5), the coagulant addition means 101 continues to add coagulant. On the other hand, if the estimated remaining amount falls below the remaining amount threshold (No in Step 213 of Figure 5), a predetermined alert is output by the purification alert output means 108 (Step 214 in Figure 5), and coagulant is replenished in the coagulant tank (Step 215 in Figure 5). This replenishment process is performed by an operator.

[0045] 2. Neutralization Processing Management System Next, the neutralization treatment management system 300 of the present invention will be described. The neutralization treatment management system 300 remotely changes the line that supplies a neutralizing agent to turbid water. Figure 6 is a block diagram showing the main configuration of the neutralization treatment management system 300 of the present invention. As shown in this figure, the neutralization treatment management system 300 is configured to include a neutralizing agent supply line 301, an on / off valve 302, a main supply pipe 303, and a supply line switching means 304. It can also be configured to include a pressure gauge 305, a switching determination means 306, a switching information input means 307, a final pH measuring means 308, a raw water pH measuring means, an intermediate pH measuring means, a neutralization alert output means 309, and the like.

[0046] The supply line switching means 304, switching determination means 306, switching information input means 307, and neutralization alert output means 309 that constitute the neutralization processing 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, a server, a tablet PC such as an iPad®, or a portable terminal device such as a smartphone.

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

[0048] (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 lower limit (e.g., pH 5.8) and upper limit (e.g., pH 8.6) range (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 301, which constitutes the neutralization treatment management system 300, is responsible for supplying the neutralizing agent to the turbid water.

[0049] Figure 7 is a schematic model diagram showing the neutralizing agent supply line 301, the on-off valve 302, the main supply pipe 303, etc. As shown in this figure, the neutralizing agent supply line 301 consists of a neutralizing agent container 310 and a sub-supply pipe 311. The neutralizing agent container 310 is filled with the neutralizing agent, and can be, for example, a carbon dioxide cylinder. Note that one neutralizing agent supply line 301 can be arranged with one neutralizing agent container 310, or two or more (five in the figure) neutralizing agent containers 310 can be arranged as shown in Figure 7. The sub-supply pipe 311 is connected to all the neutralizing agent containers 310 that make up the neutralizing agent supply line 301 and is a pipe that delivers air to the neutralizing agent in the neutralizing agent containers 310. A pressure gauge 305 can also be attached to the sub-supply pipe 311 to measure the pressure inside the sub-supply pipe 311, that is, the residual pressure in the neutralizing agent container 310.

[0050] One of the technical features of the neutralization treatment management system 300 of the present invention is that it has a spare neutralizing agent container 310 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 310 is depleted, and that the neutralizing agent container 310 is switched automatically. Therefore, the neutralization treatment management system 300 is equipped with two or more neutralizing agent supply lines 301. When the neutralizing agent in one neutralizing agent supply line 301 is depleted, the system switches to another neutralizing agent supply line 301 to continue supplying neutralizing agent. Figure 7 shows an example equipped with two neutralizing agent supply lines 301 consisting of "line A" and "line B", but of course, it is also possible to have three or more neutralizing agent supply lines 301.

[0051] (Open / close valve) The on-off valve 302, which constitutes the neutralization treatment management system 300, is connected to all auxiliary supply pipes 311 related to the neutralizing agent supply line 301, and can open and close these auxiliary supply pipes 311. The neutralization treatment management system 300 may also be further equipped with a check valve in addition to the on-off valve 302. The on-off valve 302 opens (opens) one of the two or more auxiliary supply pipes 311 and closes (closes) all the other auxiliary supply pipes 311, and can also change (switch) which auxiliary supply pipe 311 is opened. However, the on-off valve 302 automatically opens and closes the auxiliary supply pipes 311 by remote operation, that is, it switches which auxiliary supply pipe 311 is opened by remote operation. Of course, the neutralizing agent will be supplied from the neutralizing agent supply line 301 related to the opened auxiliary supply pipe 311, and the neutralizing agent will not be supplied from the neutralizing agent supply line 301 related to the closed auxiliary supply pipe 311. For convenience, the state in which the neutralizing agent supply line 301 is supplying neutralizing agent (i.e., the auxiliary supply pipe 311 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 311 is closed) will be referred to as the "standby state." If the neutralizing agent supply line 301 is equipped with two or more neutralizing agent containers 310, when the neutralizing agent supply line 301 enters the supply state, neutralizing agent will be sent from all neutralizing agent containers 310 included in the neutralizing agent supply line 301 to the auxiliary supply pipe 311.

[0052] (Main supply pipe) The main supply pipe 303 is connected to the shut-off valve 302 and is a pipe that supplies the neutralizing agent to the turbid water. In other words, the main supply pipe 303 is connected to all the auxiliary supply pipes 311 via the shut-off valve 302, and the neutralizing agent in the neutralizing agent container 310 related to the neutralizing agent supply line 301 that is in a supply state is supplied to the turbid water from the auxiliary supply pipe 311 through the main supply pipe 303. A main shut-off valve can also be installed in the main supply pipe 303, 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 302 of the auxiliary supply pipe 311, can also be automatically opened and closed by remote control.

[0053] (pH measurement means) The final pH measuring means 308, which constitutes the neutralization treatment management system 300, measures the pH of the clarified 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 308, the raw water pH measuring means, and the intermediate pH measuring means (hereinafter collectively referred to simply as "pH measuring means") can measure the clarified 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 308) 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" from the turbid water treatment plant to the control building, and are further displayed on a display means (hereinafter referred to as "pH display means") such as a display located in the control building.

[0054] 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 3, a graph showing the pH change over time and the pH tolerance range (upper and lower limits) is displayed on the pH display device.

[0055] (Supply line switching means) The supply line switching means 304, which constitutes the neutralization treatment management system 300, is a means of switching the neutralizing agent supply line 301 that is in a supply state to another neutralizing agent supply line 301 by controlling the on-off valve 302. Specifically, when the supply line switching means 304 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 304 receives switching information that includes "a neutralizing agent supply line 301 that should be in a supply state (hereinafter referred to as "designated line")", it controls the on-off valve 302, thereby closing the auxiliary supply pipe 311 of the neutralizing agent supply line 301 that was in a supply state and opening the auxiliary supply pipe 311 of the designated line. For example, when control information designating line A as the designated line is received, the auxiliary supply pipe 311 related to line A is opened and the other auxiliary supply pipes 311 are closed. Subsequently, when control information designating line B as the designated line is received, the auxiliary supply pipe 311 related to line B is opened and the other auxiliary supply pipes 311, including line A, are closed. In addition, if the neutralization treatment management system 300 has only two neutralizing agent supply lines 301, the supply line switching means 304 can be configured to receive "switching information that does not include the designated line" and simply switch from one supply line switching means 304 to the other neutralizing agent supply line 301.

[0056] When the supply line switching means 304 receives switching information, or in other words, when inputting this switching information to the supply line switching means 304, two methods can be cited: one using the switching information input means 307 and the other using the switching determination means 306. Of these, the switching information input means 307 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 304. Alternatively, the switching information input means 307 can simply input switching information indicating a switch (i.e., switching information that does not include a specified line).

[0057] The switching determination means 306 determines whether or not to switch the neutralizing agent supply line 301 based on the remaining pressure obtained by the pressure gauge 305. If it is determined that a switch to the neutralizing agent supply line 301 is necessary, switching information is generated and this switching information is input to the supply line switching means 304. The procedure by which the switching determination means 306 determines whether or not to switch the neutralizing agent supply line 301 will be described below. When the remaining pressure of the neutralizing agent container 310 related to the neutralizing agent supply line 301 that has been put into supply mode is measured by the pressure gauge 305, the switching determination means 306 receives the remaining pressure data. The switching determination means 306 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 301 that has been put into supply mode, and if the remaining pressure data falls below the remaining pressure threshold, it determines that a switch to the neutralizing agent supply line 301 is necessary (hereinafter referred to as the "switching requirement determination").

[0058] When the neutralization treatment management system 300 has three or more neutralizing agent supply lines 301, the system can be configured so that the switching determination means 306 determines the "neutralizing agent supply line 301 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 301 is in a supply state, and the other two or more lines are in a standby state. Therefore, the switching determination means 306 determines one supply line switching means 304 from among the neutralizing agent supply lines 301 that are in a standby state. When the switching determination means 306 determines the supply line switching means 304, it can determine the neutralizing agent supply line 301 on the condition that the residual pressure of the neutralizing agent container 310 exceeds the residual pressure threshold. The switching determination means 306 receives residual pressure data for all neutralizing agent containers 310 related to the two or more neutralizing agent supply lines 301 that are in a standby state, compares that residual pressure data with the residual pressure threshold, and then determines the neutralizing agent supply line 301. Furthermore, if two or more neutralizing agent supply lines 301 exceeding the residual pressure threshold are identified, the system can be configured to select any neutralizing agent supply line 301, or to select the line with the oldest neutralizing agent container 310 installed.

[0059] (Neutralization alert output means) The neutralization alert output means 309, which constitutes the neutralization processing management system 300, 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 309 can output alerts according to pH data. In this case, when the neutralization alert output means 309 receives pH data from the final pH measurement means 308 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.

[0060] (Example of use) Referring to Figures 8 and 9, an example of neutralizing turbid water using the neutralization treatment management system 300 of the present invention will be described. Figure 8 is a flowchart showing the procedure for neutralizing turbid water using the neutralization treatment management system 300 of the present invention, and Figure 9 is a step-by-step diagram. In Figure 8, the steps shown by dashed lines are performed by an operator. For convenience, the neutralization treatment management system 300 will be described here in an example that includes two neutralizing agent supply lines 301 consisting of "Line A" and "Line B".

[0061] As shown in Figure 9(a), first, the neutralizing agent supply lines 301 for line A and line B are positioned with the neutralizing agent containers 310 filled to capacity. The auxiliary supply pipe 311 for line A is opened, thus keeping line A 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 311 of line A to the main supply pipe 303 (Step 401 in Figure 8). The pressure gauge 305 periodically (or continuously) measures the residual pressure in the neutralizing agent container 310 for line A. If the residual pressure exceeds the residual pressure threshold (Yes in Step 402 in Figure 8), the supply state of line A is maintained and the standby state of line B is maintained, as shown in Figure 9(b).

[0062] On the other hand, as shown in Figure 9(c), when the residual pressure in the neutralizing agent container 310 related to line A falls below the residual pressure threshold (No. in Step 402 of Figure 8), the supply line switching means 304 controls the on-off valve 302 to put line B into a supply state and line A into a standby state, as shown in Figure 9(d) (Step 403 of Figure 8). For example, when an operator inputs switching information into the switching information input means 307, that switching information is input to the supply line switching means 304. Alternatively, the switching determination means 306 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 304. When the supply line switching means 304 receives the switching information, it controls the on-off valve 302, which opens the auxiliary supply pipe 311 related to line B and closes the auxiliary supply pipe 311 related to line A. Also, as shown in Figure 9(d), the empty neutralizing agent container 310 for line A is replaced with a filled neutralizing agent container 310 (Step 404 in Figure 8).

[0063] 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 311 of line B through the main supply pipe 303 to the main supply pipe 303 (Step 405 in Figure 8). The pressure gauge 305 periodically (or continuously) measures the residual pressure in the neutralizing agent container 310 related to line B, and if the residual pressure exceeds the residual pressure threshold (Yes in Step 406 in Figure 8), the supply state of line B is maintained and the standby state of line A is maintained, as shown in Figure 9(f).

[0064] On the other hand, as shown in Figure 9(g), when the residual pressure in the neutralizing agent container 310 for line B falls below the residual pressure threshold (No. in Step 406 of Figure 8), the supply line switching means 304 controls the on / off valve 302 to put line A into a supply state and line B into a standby state, as shown in Figure 9(h) (Step 407 of Figure 8). Also, as shown in Figure 9(h), the empty neutralizing agent container 310 for line B is replaced with a filled neutralizing agent container 310 (Step 408 of Figure 8).

[0065] Figure 10 is a flowchart showing the procedure for the neutralization alert output means 309 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 411 in Figure 10). Then, when the turbid water is pumped from the raw water tank to the reaction tank through piping (Step 412 in Figure 10), the pH in the reaction tank is measured by the intermediate pH measuring means (Step 413 in Figure 10). At this time, if the pH of the turbid water in the reaction tank is within the pH tolerance range (Yes in Step 414 in Figure 10), it is transferred directly to the discharge tank (Step 416 in Figure 10). On the other hand, if the pH is outside the pH tolerance range (No in Step 414 in Figure 10), a neutralizing agent is supplied to the reaction tank (Step 415 in Figure 10), and then it is transferred to the discharge tank (Step 416 in Figure 10). 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 412 in Figure 10), this acts as a trigger to automatically supply the neutralizing agent to the reaction tank.

[0066] Once the clarified water is stored in the discharge tank, the pH is measured by the final pH measuring means 308 (Step 417 in Figure 10). If the pH falls within the acceptable pH range (Yes in Step 418 in Figure 10), the water is discharged as is. On the other hand, if the pH falls outside the acceptable pH range (No in Step 418 in Figure 10), a predetermined alert is output by the neutralization alert output means 309 (Step 419 in Figure 10), the clarified water is returned to the raw water tank as turbid water, and the series of neutralization treatments (Steps 411 to 418) are performed again.

[0067] 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.

[0068] 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.

[0069] The following provides a detailed explanation of each component of the document creation system 500.

[0070] (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 104, 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 308, 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 106, control data by the output adjustment means 102, control data by the supply line switching means 304, alert data output by the purification alert output means 108 and the neutralization alert output means 309, data on replenishing coagulant and replacing the neutralizing agent container 310, 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 106. 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 310 related to the neutralizing agent supply line 301, which was opened once and then closed by the supply line switching means 304. 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.

[0071] (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.

[0072] 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]

[0073] 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]

[0074] 100 Purification treatment management system of the present invention 101 Coagulant Addition Method (of the Purification Treatment Management System) 102 Output adjustment means (of the purification treatment management system) 103 (Means for setting the amount of additive in the purification treatment management system) 104 Means for measuring raw water turbidity, etc. (of a water purification treatment management system) 105 (Method for measuring final turbidity, etc., of a purification treatment management system) 106 (Means for estimating the remaining amount of coagulant in a waste treatment management system) 107 (Means for displaying the remaining amount of coagulant in the purification treatment management system) 108 (Purification alert output means of the purification treatment management system) 109 Liquid level measuring means (of a purification treatment management system) 110 (Means for measuring intermediate turbidity, etc., of a purification treatment management system) 300 Neutralization Processing Management System of the Present Invention 301 (Neutralizing agent supply line of the neutralization process management system) 302 (Neutralization Treatment Management System) On / Off Valve 303 Main supply pipe (of the neutralization treatment management system) 304 Supply line switching means (of the neutralization processing management system) 305 (Pressure gauge for neutralization treatment management system) 306 Switching determination means (of the neutralization processing management system) 307 (Switching information input means for neutralization processing management system) 308 (Means for measuring the final pH of a neutralization treatment management system) 309 Neutralization alert output means (of the neutralization processing management system) 310 (Neutralizing agent container for neutralization treatment management system) 311 (Auxiliary supply pipe of the neutralization 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 raw water turbidity measurement means for measuring the turbidity or suspended solids of turbid water stored in a raw water tank, An additive amount setting means for setting an appropriate additive amount according to the turbidity or SS measured by the raw water turbidity measurement means, A means for adding a flocculant, The system includes an output adjustment means for adjusting the addition of the flocculant by the flocculant adding means, The additive amount setting means sends control information including the appropriate additive amount to the output adjustment means. Upon receiving the control information, the output adjustment means adjusts the output frequency of the coagulant adding means to add the coagulant in the appropriate amount. A turbid water treatment plant management system characterized by the following features.

2. The additive amount setting means sets the appropriate additive amount based on a predetermined relationship between turbidity or SS and the appropriate additive amount. 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 additive amount setting means sets the additive amount input by the operator as the appropriate additive amount. 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 means for estimating the remaining amount of the flocculant by measuring the liquid level of the flocculant contained in the container, The system further includes a remaining amount display means that receives and displays the remaining amount of the flocculant estimated by the remaining amount estimation 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 data storage means that stores measurement data measured by the raw water turbidity measurement means and data on the actual amount of coagulant added by the coagulant addition means, along with the time. The system includes a report creation means that creates a purification treatment report representing the measurement data and the actual amount of additive data for each time period, based on the measurement data and the actual amount of additive data read from the data storage means. A turbid water treatment plant management system according to claim 1, characterized in that it is a turbid water treatment plant management system.

6. A final turbidity measurement means for measuring the turbidity or suspended solids of the clear water stored 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 final turbidity measurement means exceeds a predetermined turbidity threshold. A turbid water treatment plant management system according to claim 1, characterized in that it is a turbid water treatment plant management system.

7. A means for estimating the remaining amount of the flocculant by measuring the liquid level of the flocculant contained in the container, It includes an alert output means for outputting an alert, The alert output means outputs the alert when the remaining amount of the flocculant estimated by the remaining amount estimation means falls below a predetermined remaining amount threshold. 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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