KR100744630B1 - Method and system for controling sewage plant by monitoring the concentration of chloride ion in sewage of sewer pipe - Google Patents

Abstract

A method and a system for controlling a sewage disposal plant by using the concentration of chlorine ions contained in sewage of a sewer pipe, which control the sewage disposal plant by estimating the contamination level and the flow amount of sewage flown into the sewage disposal plant, and a chlorine ion-measuring instrument used in the method and the system are provided. In a treatment zone of a sewer pipe with a predetermined area including at least one sewage disposal plant(110), a system for controlling the sewage disposal plant by using the concentration of chlorine ions contained in sewage of the sewer pipe comprises: a plurality of chlorine ion measuring instruments(150) installed on the sewer pipe within a plurality of monitoring areas(M) to measure the concentration of chlorine ions in sewage and transmit concentration data of the measured chlorine ions to remote places through wire or wireless communication means; flow amount measuring instruments(160) installed on the lowermost stream of the sewer pipe within the respective monitoring areas to measure the flow amount of sewage and transmit data of the measured flow amount to remote places through wire or wireless communication means; a main server(140) which is connected to the plurality of chlorine ion measuring instruments and the flow amount measuring instruments through the wire or wireless communication means, stores the concentration data of chlorine ions to judge if the water quality is changed, stores the data of flow amount to judge if the flow amount is changed, and evaluates the water quality and the flow amount of sewage flown into a sewage disposal apparatus(120) to store, output and transmit the evaluation results to remote places; and a sewage disposal plant control server(130) connected to the main server through the wire or wireless communication means to control the operation of the sewage disposal apparatus.

Description

METHOD AND SYSTEM FOR CONTROLING SEWAGE PLANT BY MONITORING THE CONCENTRATION OF CHLORIDE ION IN SEWAGE OF SEWER PIPE}

1 is a block diagram showing a sewage pipe monitoring system according to the prior art,

2 is a conceptual diagram showing a method of analyzing invasive water and influent using the chlorine ion concentration and flow rate in sewage according to the prior art;

3 is an overall schematic view showing a sewage treatment plant control system using chlorine ion concentration in sewage pipe according to the present invention,

Figure 4 is a block diagram showing a sewage treatment plant automatic control system using the chlorine ion concentration in the sewage pipe according to the present invention,

5 is a perspective view showing a chlorine ion meter according to the present invention,

6 is a cross-sectional view showing a sensing rod of the chlorine ion meter according to the present invention,

7 is a block diagram showing an internal configuration of a potentiometer according to the present invention;

8A and 8B are schematic views showing examples of two methods for installing a chlorine ion meter according to the present invention in a sewer pipe;

9A and 9B are explanatory diagrams for showing the features of the chlorine ion meter according to the present invention.

**** Description of the symbols for the main parts of the drawings ****

100: sewage pipe treatment area 110: sewage treatment plant

120: sewage treatment device 130: sewage treatment plant management server

140: main server 150: chlorine ion meter

160: flow meter 190: database

The present invention relates to a method for controlling a sewage treatment plant, and more particularly, by using a plurality of chlorine ion measuring devices installed on sewage pipes in real time to measure the concentration of chlorine ions in the sewage, and based on the measured chlorine ion concentrations, Sewage treatment plant control method and system and fixed chlorine for sewage treatment plant using chlorine ion concentration in sewage pipe that can automatically control the operation of sewage treatment device according to pollution degree of inflow sewage by predicting the quality of sewage flowing into the sewage treatment plant located It relates to an ion meter.

In general, sewage pipes (下 水管 渠) refers to sewage pipes that collect sewage discharged from various sewers and send them down to the sewage treatment plant. These sewer pipes are arranged in the form of branches (water) because they are installed along the natural flow of sewage according to the gradient of the treatment zone. Since sewer pipes are buried underground, it is difficult to check the condition of the pipes and the quality of the sewage after the installation is completed. In addition, it takes a lot of time and effort to measure the quality of the sewage in the sewage pipe.

The sewage treatment plant is installed at the bottom of the sewage pipe and discharges the pollutants contained in the sewage to natural water by physical, chemical and biological methods. The treatment efficiency of the sewage treatment plant is influenced by the contamination and flow rate of the influent sewage flowing into the sewage treatment plant.In particular, when treating with microorganisms, the treatment efficiency is not only high when the sewage is too high, but also when the sewage is too low. Will fall. Therefore, the water quality and flow rate of the influent sewage flowing into the sewage treatment plant is preferably kept as uniform as possible.

However, the amount of sewage discharged through sewage pipe fluctuates with time, and even if a sewer pipe is installed, if there is a fault in the sewage pipe, sewage or groundwater or rainwater flows from the outside, and the quality of the sewage water fluctuates. In particular, when the water quality and flow rate of the influent sewage flowing into the sewage treatment plant fluctuate rapidly, it is not predicted in advance, and the sewage treatment system may not be properly discharged unless the operating conditions of the sewage treatment apparatus are changed.

In the conventional sewage treatment plant, a sedimentation tank, a bioreactor, a concentration tank, etc. were designed based on the average water quality and the average flow rate of the influent sewage, and the sudden water quality and the flow rate fluctuations of the influent sewage were buffered at the flow control pond. However, there is a limit to uniform the water quality and the flow rate only by the flow rate adjustment, and it is difficult to secure the installation site because a wide installation site is required to install the flow rate adjustment site. In recent years, sewage treatment plants have been developed that minimize the size of flow control paper or have no flow control paper. If the size of the flow stop is reduced or omitted, the influent sewage is introduced directly into the sedimentation tank or the bioreactor, so that the influence on the water quality and flow fluctuations of the influent sewage is greater.

On the other hand, a typical phenomenon that occurs due to poor sewage pipes is the generation of infiltration and inflow (or unknown). Invasive water refers to the penetration of groundwater and rainfall through pipes, such as damage to sewage pipes, poor pipe joints, and poor connection to connecting pipes. Inflow water refers to the inflow of rainwater into the pipe due to poor sealing of manholes, storm drains, roof gutters, basement drains, etc. Such infiltration water and inflow water increases the flow rate in the sewage pipe to reduce the water flow capacity, and lower the sewage concentration of the sewage treatment plant to reduce the treatment efficiency of the sewage treatment device. On the contrary, when the groundwater level is lower than the sewage pipe, the leakage of sewage from the defective part of the conduit causes the groundwater to be contaminated and the flow rate of the sewage flowing into the sewage treatment plant decreases, thereby reducing the treatment efficiency of the sewage treatment plant.

As such, the inflow of infiltration and inflow due to the failure of sewage pipe is not only closely related to the fluctuations of water quality and flow rate, but also to the treatment efficiency of the sewage treatment plant. For example, when wastewater containing high concentrations of contaminants such as livestock wastewater and factory wastewater flows into sewage pipes, the pollution concentration of sewage is rapidly increased, and when the groundwater or rainwater is introduced, the pollution concentration of sewage is rapidly dropped. Therefore, a means for predicting the quality of the sewage flowing into the sewage treatment plant by measuring the quality of the sewage in the sewage pipe in real time is required.

1 is a block diagram showing an example of a sewage pipe monitoring system according to the prior art. As shown, conventional systems have several types of sewerage systems, such as rainfall meters (1), flow meters (3), water meters (5), electrical conductivity meters (7), and groundwater level observation equipment (9). It is equipped with a field instrument, the field instruments are connected to the DB server 15 through the interface and communication network and management analysis server (11).

 The conventional sewage pipe monitoring system is to apply the water usage evaluation method, the daily maximum-minimum flow rate evaluation method, the daily maximum flow rate evaluation method and the night life sewage evaluation method. And to analyze the amount of runoff and leakage. In addition, the conventional sewage pipe monitoring system used electric conductivity to measure the water quality of the sewage.

However, the conductivity meter is sensitive to not only organic pollutants but also groundwater or other ionic substances (Mg, Ca, etc.) that are contained in rainwater, so the sewage water quality cannot be accurately assessed. After measuring and analyzing with measurement equipment such as COD, the water quality analysis data should be used to evaluate the relationship between electrical conductivity and water quality. Therefore, the conventional conductivity meter cannot accurately measure the quality of sewage in real time, and cannot control the sewage treatment plant based on the results.

On the other hand, chlorine ions (Cl ⁻ ) dissolved in water do not change over time, and almost no chlorine ions are contained in general rainfall or groundwater (except for some). However, even in normal rainfall or groundwater, water (sewage) used in human life contains large amounts of chlorine ions. In other words, people (or livestock) must consume salt to survive, so the water, food, or excretions used by humans contain large amounts of chloride ions. These foods and wastes are washed in the process of bathing, washing dishes, washing, cleaning, washing, or processing food waste and flow into sewage. Thus, the concentration of chlorine ions in sewage makes it possible to distinguish whether the water is natural water, such as rainfall or groundwater, or human waste. In addition, the concentration of chlorine ions in the sewage can be used as an indicator showing the pollution degree of the sewage. Therefore, if the chlorine ion concentration in the sewage is measured in real time, it is possible to control the sewage treatment plant based on this.

Figure 2 shows a method of analyzing the type and location and flow rate of infiltration and inflow water using the chlorine ion concentration and the flow rate in the sewage according to the prior art. This method has been patented by the present inventors, and as disclosed in a previously filed patent (Korean Patent Application No. 10-2006-0049577), the conventional method has a flow meter (Q) installed a certain distance away from the sewage pipe Using the chlorine ion concentration measuring device (C) installed to measure the chlorine ion concentration of the sewage passing through the flow meter (Q), the sewage flow rate and chlorine ion concentration are measured at each measuring point, and the flow rate of the sewage and The relationship between chlorine ion concentration is used to analyze the type, location, and flow rate of infiltration and influent.

However, the prior art is to analyze the type, location and flow rate of infiltration and influent, and is not a system for predicting the quality and flow rate of sewage flowing into the sewage treatment plant. In addition, flow meter and chlorine ion concentration meter should be installed at each measuring point of sewage pipe in order to accurately and quickly measure the information about the quality and flow of sewage from the whole sewage pipe installation area. In particular, it takes considerable time to preempt the sedimentation tank or biological reactor or discharge the sludge in advance in response to fluctuations in water quality or flow rate of the influent sewage, so install a flow meter and a chlorine ion concentration meter upstream of the sewage pipe. There is a need.

However, the flow meter for measuring the flow rate of sewage is very expensive, so the economic burden to install from upstream to downstream of the sewer pipe is great. Therefore, at present, the flow meter is installed only at the main downstream measuring points and not at the upstream area (X: Fig. 2), so it is possible to predict the water quality and flow rate of the sewage flowing into the sewage treatment system in the whole sewage pipe installation area early. Could not build the system.

In addition, in the related art, a technique for fixing a chlorine ion concentration meter which is fixed to a sewer pipe is not disclosed. In recent years, efforts have been made to evaluate the quality of sewage by measuring BOD or COD in sewage, but BOD or COD-inducing substances in sewage not only change with time, but also sedimentation and injury occur depending on the structure of sewage pipes. The disadvantage is that the measurement results are not constant. In addition, the measuring equipment for measuring the BOD or COD is very expensive, it is difficult to install as much as necessary upstream of the sewer pipe.

The present invention is to solve the above-mentioned problems of the prior art, the main object of the present invention is to install a plurality of chlorine ion meter on the sewer pipe in real time to measure the concentration of chlorine ion in the sewage, measured by each chlorine ion meter The present invention provides a method and system for controlling a sewage treatment plant using a chlorine ion concentration in a sewage pipe that controls the sewage treatment plant in advance by predicting the pollution level of sewage flowing into the sewage treatment plant based on the chlorine ion concentration.

Another object of the present invention is to divide the treatment area of the entire sewage pipe into a plurality of monitoring areas in consideration of morphological characteristics and land-use characteristics, and chlorine which can continuously measure the concentration of chlorine ions in the sewage on the sewer line of each monitoring area. Install a plurality of ion meters, and install one flow meter at the bottom of each monitoring area to measure the flow of sewage, and go to the sewage treatment plant based on the chlorine ion concentration measured at each chlorine ion meter and the flow rate measured at the flow meter. It is to provide a method and a system for controlling a sewage treatment plant using chlorine ion concentration in a sewage pipe that can control the sewage treatment device by predicting the contamination and flow rate of the sewage introduced in advance.

Another object of the present invention is to provide a fixed chlorine ion meter which can be fixed on the sewage pipe to selectively measure the concentration of chlorine ions in the sewage and transmit the measured chlorine ion concentration data to a remote location.

As a means for achieving the above object, the sewage treatment plant control system using the chlorine ion concentration in the sewage pipe according to the present invention, is installed on the sewage pipe in a plurality of monitoring areas partitioned in consideration of the morphological characteristics and land use characteristics of the sewage pipe A plurality of chlorine ion measurement devices for measuring chlorine ion concentration in the sewage and transmitting the measured chlorine ion concentration data to a remote site through wired or wireless communication means; A flow rate measuring device installed at the most downstream of the sewage pipe in each monitoring area to measure the flow rate of the sewage and transmit the measured flow rate data to a remote location through a wired or wireless communication means; The chlorine ion meter and the flow meter are connected to each other through wired and wireless communication means, and store the chlorine ion concentration data received from the chlorine ion meter and determine the change in water quality in comparison with the comparative chlorine ion concentration stored in the database. In addition, the flow rate data received from the flow meter is stored and the flow rate is determined in comparison with the comparative flow rate stored in the database, and the inflow sewage flowing into the sewage treatment plant is considered in consideration of the distance from each monitoring area to the sewage treatment plant. A main server for evaluating the water quality and the flow rate of the water, and storing the result and outputting the result to a remote location; The sewage treatment plant management server is connected to the main server through a wired / wireless communication means and controls the operation of the sewage treatment apparatus according to the water quality and flow rate of the inflow sewage transmitted from the main server.

In addition, as a means for achieving the above object, the sewage treatment plant control method using the chlorine ion concentration in the sewage pipe according to the present invention, each monitoring area divided into a plurality of unit monitoring zones in consideration of the shape of the sewage pipe and the characteristics of the residential environment Installing a plurality of chlorine ion meters on the sewage pipes in the lower part of the pipes, and installing flowmeters at the most downstream of each monitoring area; The chlorine ion concentration data and the flow rate data measured by the chlorine ion meter and the flow meter of each monitoring area are transmitted to a remote main server, and the main server stores the chlorine ion concentration data received from the chlorine ion meter. The water quality change is judged in comparison with the comparative chlorine ion concentration stored in the database, the flow rate data received from the flow meter is stored, and the flow rate is determined in comparison with the comparative flow rate stored in the database. Evaluating the water quality and flow rate of the influent sewage flowing into the sewage treatment plant in consideration of the distance to the sewage treatment plant, and storing, outputting and transmitting the result to a remote site; According to the water quality and flow rate of the inflow sewage transmitted from the main server to control the operation of various valves and pumps constituting the sewage treatment device in the sewage treatment plant management server to switch to the sewage treatment device operation method suitable for the water quality and flow rate of the incoming raw water Consists of steps.

Subsequently, the fixed chlorine ion meter according to the present invention includes a main body made of a case including a communication unit and a potentiometer therein; A cylindrical guide tube extending vertically from the lower surface of the main body and having a coupling means for fixing to a sewer pipe or a manhole on an outer circumferential surface thereof and having guide grooves formed vertically vertically; One end of the lever installed in the guide tube and installed through the guide groove to be movable up and down along the guide groove is fixed therein, and an ion electrode, a comparison electrode, and an electrical electrode electrically connected to a potentiometer inside the body. Sensing rods each having a temperature sensor; A floating body installed at the lower side of the other side of the lever penetrating the guide groove of the guide tube to generate buoyancy so that the sensing rod moves up and down according to the surface of the sewer pipe; A spray nozzle which is installed to protrude at the bottom of the sensing rod and sprays air bubbles or cleaning liquid to clean the ion electrode, the comparative electrode and the temperature sensor exposed to the outside; It is installed to surround the bottom of the sensing rod is characterized in that it comprises a protective net to prevent the lower end of the sensing rod is damaged by foreign matter floating with the sewage.

Hereinafter, with reference to the accompanying drawings will be described in detail a method and system for controlling the sewage treatment plant using the chlorine ion concentration in the sewage pipe according to the present invention, and a preferred embodiment of the chlorine ion meter for this.

First, Figures 3 and 4 is a schematic configuration showing a sewage treatment plant control system using the chlorine ion concentration in the sewage pipe according to the present invention.

As shown in Figure 3, the sewage pipe is generally made in the form of branches (trees) according to the topographical characteristics of the treatment zone 100, one treatment zone 100 is different from the commercial district, residential area, industrial area, etc. It can be divided into regions with land use characteristics.

The sewage treatment plant automatic control system using the chlorine ion concentration in the sewage pipe according to the present invention is to efficiently measure the chlorine ion concentration and the flow rate of the influent sewage flowing into the sewage treatment plant 110 from the entire treatment zone 100. Therefore, in the present invention, it is preferable that the treatment zone 100 of the sewage pipe of a predetermined area having at least one sewage treatment plant 110 is divided into a plurality of monitoring zones M in consideration of its morphological characteristics and land use characteristics.

The monitoring area (M) is the minimum unit that can divide the treatment area 100 of the entire sewage pipe in consideration of morphological characteristics and land-use characteristics, and in general, the flow rate of sewage discharged from one unit monitoring area (M) Can be represented as a graph of a certain pattern when arranged in time series. In addition, the concentration of chlorine ions in the sewage discharged from the unit monitoring area M is kept uniform within a certain range. In the unit monitoring area (M), there is a close correlation between the discharged amount of chlorine ions and the quality of the sewage. On the other hand, the plurality of monitoring zones (M) can be divided into a larger area of the monitoring zone (G) according to the geographic characteristics, at this time, the flow meter 160 is installed in the downstream of each monitoring zone (G).

The sewage treatment plant control system using the chlorine ion concentration in the sewage pipe according to the present invention, considering the morphological characteristics and land-use characteristics of the sewage pipe, a plurality of chlorine ion meter 150 on the sewage pipe of each monitoring zone (M) partitioned It is installed at predetermined intervals, and one flow meter 160 is installed at the most downstream of each monitoring zone M. In this case, at the measurement point where the flow meter 160 is installed, a chlorine ion meter 150 for measuring the concentration of chlorine ions in the sewage is installed or a flow rate meter (not shown) for measuring the flow rate of the sewage is further installed. It is desirable to.

 As described above, the present invention provides a chlorine ion meter 150 that can selectively measure chlorine ions in the sewage at low cost while minimizing the installation of a relatively expensive flow meter 160 evenly upstream of the branch line of each monitoring area M. By installing it, it is possible to measure the pollution degree of the sewage in the entire sewage pipe treatment area 100 in real time.

That is, in the past, the flow rate of the sewage was observed to analyze the location of the influent and the inflow water and the flow rate thereof. However, the present invention not only determines the presence of the influent and the intrusion water by observing changes in the quality of the sewage in real time, but also the variation thereof. In response to the water quality of the sewage flowing into the sewage treatment plant 110 will be able to control the sewage treatment device 120. In addition, the present invention, if the data on the flow rate and the data on the distance to each monitoring area (M) and the sewage treatment plant 110, the sewage discharged from each monitoring area (M) reaches the sewage treatment plant 110 You can calculate the time to do. And by measuring the chlorine ion concentration of the sewage discharged from each monitoring area (M) can predict the water quality and flow rate of the influent sewage flowing into the sewage treatment plant 110 after a predetermined time. As described above, the present invention may control the operation of the sewage treatment apparatus 120 in response to the quality and flow rate of the inflow sewage by predicting the pollution degree and the flow rate of the inflow sewage flowing into the sewage treatment plant 110.

3 and 4, the sewage treatment plant automatic control system using the chlorine ion concentration in the sewage pipe according to the present invention will be described in more detail.

The installation area 100 of the entire sewage pipe is divided into a plurality of monitoring areas (M) in consideration of morphological characteristics and land use characteristics. The sewage pipes in each monitoring area (M) measure the concentration of chlorine A plurality of chlorine ion meter 150 is installed that can transmit chlorine ion concentration data to a remote location through wired or wireless communication means.

In addition, one flow meter 160 for measuring the flow rate of the sewage discharged from the monitoring area M and transmitting the measured flow rate data to a remote location through a wired / wireless communication means at the most downstream of the sewage pipe in each monitoring area M. Are installed respectively. More preferably, a flow rate meter for measuring the flow rate of the sewage discharged from the monitoring area M or a chlorine ion meter for measuring the chlorine ion concentration may be further installed at the lowest downstream of the sewage pipe in each monitoring area M. Can be.

In addition, the plurality of chlorine ion meter 150 and the flow meter 160 installed in each monitoring area (M) is connected to the main server 140 through wired or wireless communication means. The main server 140 stores the chlorine ion concentration data received from the chlorine ion meter 150 and determines the variation of water quality in comparison with the comparative chlorine ion concentration stored in the database 190, and the flow meter In addition to storing the flow rate data received from the 160 and to determine the change in the flow rate compared to the comparison flow rate stored in the database 190, in consideration of the distance from each monitoring area (M) to the sewage treatment plant 100 Evaluate the water quality and flow rate of the influent sewage flowing into the sewage treatment plant 100, and store the results, output and transmit to a remote location.

To this end, the main server 140 is a communication module for wired and wireless communication connection, a data processing unit for processing chlorine ion concentration data and flow rate data, chlorine ion concentration data 192, flow rate data 193 and each monitoring A database 190 storing distance data 194 from an area to a sewage treatment plant, and the data processing unit and the database are linked to determine fluctuations in water quality and flow rate of the sewage, and the quality of inflow sewage flowing into the sewage treatment plant. It includes a main processor that calculates overflow. Detailed descriptions of the communication module and data processing unit will be omitted.

That is, the main server 140 not only displays the chlorine ion concentration data and the flow rate data received from the chlorine ion meter 150 and the flow meter 160 in real time, but also stores them in the database according to the measured time. Comparative chlorine ion concentration data or comparative flow rate data already stored in the database, for example, chlorine ion concentration data and flow rate data measured at the same time on different days, or average chlorine ion concentration data and mean flow rate data measured at the same time. In addition to determining the current water quality fluctuations and flow rate fluctuations in comparison with the recall, displaying, storing, outputting and transmitting the results, as well as the chlorine ion concentration and flow rate measured in each monitoring zone (M) and each monitoring zone (M). Pollution degree and flow rate of the influent sewage flowing into the sewage treatment plant 100 after a certain time based on the distance between the sewage treatment plant and the sewage treatment plant. In addition, the prediction value is displayed, stored, output and transmitted, as well as an alarm signal is transmitted to the sewage treatment plant management server 130 when the water quality and flow rate of the sewage fluctuate rapidly and exceed the limit value.

The sewage treatment plant 110 is provided with a sewage treatment plant management server 130 connected to the main server 140 to exchange information. The sewage treatment plant management server 130 controls the operation of various valves and pumps constituting the sewage treatment apparatus 120 according to the pollution degree and the flow rate of the inflow sewage transmitted from the main server 140. For example, the sewage treatment plant management server 130 controls the residence time of the sedimentation tank or the bioreactor of the sewage treatment device 120 by opening and closing the operation of various valves and pumps, or using the sedimentation tank as a bioreactor, The sludge can be discharged to convert into a settling tank, or the flow path of the treated or influent can be blocked or altered. In addition, the sewage treatment plant management server 130 opens and closes the operation of various valves and pumps according to the quality of the discharged water discharged from the sewage treatment plant. In other words, the sewage treatment plant management server 130 to maintain the optimum operating state by controlling the overall device in accordance with the water quality and flow rate of the influent sewage and effluent.

As described above, the sewage treatment plant control method using the chlorine ion concentration in the sewage pipe according to the present invention is achieved according to the following process.

First, in consideration of the shape of the entire sewage pipe installation area and the characteristics of the residential environment, it is divided into a plurality of monitoring areas (M), and a plurality of chlorine ion meters 150 are installed on the sewage pipes within each monitoring area (M) at a predetermined distance. And installing one flow meter 160 downstream of each monitoring zone;

The chlorine ion concentration data and the flow rate data measured by the chlorine ion meter and the flow meter of each monitoring area are transmitted to the remote main server 140, and the main server receives the chlorine ion concentration received from the chlorine ion meter 150. In addition to storing data and determining the variation in water quality in comparison with the comparative chlorine ion concentration stored in the database 190, and stores the flow rate data received from the flow meter 150 and stored in the database 190 Judging the fluctuation of the flow rate in comparison with the comparative flow rate, considering the distance from each monitoring area (M) to the sewage treatment plant 100, evaluates the water quality and flow rate of the incoming sewage flowing into the sewage treatment plant, and stores the result, Outputting and transmitting to a remote location;

The sewage treatment plant management server 130 automatically controls the operation of various valves and pumps constituting the sewage treatment device according to the water quality and flow rate of the inflow sewage transmitted from the main server 140 to correspond to the water quality and flow rate of the inflowing raw water. And controlling the sewage treatment apparatus.

Next, a preferred embodiment of the chlorine ion meter 150 fixed on the sewage pipe to selectively measure the concentration of chlorine ions in the sewage will be described in detail with reference to the accompanying drawings.

5 is a perspective view showing a chlorine ion meter according to the present invention, Figure 6 is a cross-sectional view showing a sensing rod of the chlorine ion meter according to the present invention, Figure 7 is a block diagram showing the internal configuration of the potentiometer according to the present invention.

First, as shown in FIGS. 5 and 6, the chlorine ion meter 150 according to the present invention is composed of a potentiometer, an ion electrode, a comparative electrode, and a temperature sensor, and the concentration of an analyte (chlorine ion) in a sample ( It is a measuring instrument that quantifies the concentration of ion to be analyzed by using the potential difference between the comparison electrode and the ion electrode in response to the ion activity.

The potentiometer 230 is for continuously measuring the potential difference generated between the ion electrode 252 and the comparison electrode 254, and can read the potential difference generated between the ion electrode 252 and the comparison electrode 254 to a unit of ㎷. . The ion electrode 252 has ion selectivity and generates an electric potential in proportion to the ion concentration. The ion to be analyzed varies depending on the configuration of the sensitized membrane. For example, a solid membrane electrode and a liquid membrane electrode are used to measure chlorine ions. The solid membrane electrode is a sensitized membrane made by pressure-molding a single crystal of a poorly soluble metal salt or a powder mainly composed of a poorly soluble metal salt. A liquid membrane electrode is prepared by dissolving a liquid ion exchanger in a polar organic solvent and preserving it in a porous membrane. What is immobilized by infiltration with a polymer material is used as a sensitizing film.

The comparison electrode 254 may exhibit a potential difference with respect to ion concentration in combination with the ion electrode 252 and requires an electrode having a stable standard potential. Generally, a mercury chloride electrode (calomel electrode) or a silver-silver chloride electrode is used as the internal electrode.

In general, the ion electrode exhibits a potential difference proportional to the ion activity according to the Nernst equation in response to the ion to be measured.

E = E ₀ + [2.303RT / _Z F] log a ·············

here,

E: Potential difference generated between the ion electrode and the comparison electrode in the measurement solution

E ₀ ： Standard potential (intrinsic value determined by the composition, structure, and structure of the comparison electrode and ion electrode and sensitized film)

R ： Gas constant (8.314 J / K, mol)

T: Absolute temperature (K) When the temperature of the measurement solution rises by 10 ℃, the potential gradient changes by about 2㎷ for monovalent ion and about 1㎷ for divalent ion.

zF: Number of electrons involved in generating potential with respect to the ion electrode (ion group)

F ： Faraday constant (96480 C (Coulomb))

a: Ion activity (mol / 1)

2.303RT / _Z F: This is called the ion potential slope, and when the common logarithm of the ionic activity reciprocal is pX, it represents the potential difference per 1 pX. Have

In addition, ion activity has the following relationship between activity coefficient (γ) and ion concentration (C).

        a = γC

Where a: ionic activity (mol / 1)

       γ: activity coefficient

       C: ion concentration (mol / 1)

Therefore, the Nernst equation is a function of ion concentration (C) as follows.

E = E ₀ + (2.303RT / _Z F) log γC

= γ + [2.303RT / _Z F] logC

Therefore, if the activity coefficient γ is known, the ion concentration can be calculated directly by the potential measurement.

Here, if the constant value E ₀ + [2.303RT / _Z F] log γ is set to E ₀ ^' ,

E = E ₀ ^' + [2.303RT / _Z F] log C

Therefore, when the total ionic strength in the measurement solution is constant, the activity coefficient is also constant. If the relationship between the ion concentration and the potential difference is known in advance using a standard solution, the concentration of the target ion can be determined by measuring the potential difference of the unknown sample solution. Will be available.

Subsequently, referring to FIGS. 5 and 6, the chlorine ion meter 150 according to the present invention includes a main body 151 including a case 152 including a communication unit 238 and a potentiometer 230 therein. The guide tube 153 vertically extending from the lower surface of the main body 151, the sensing rod 155 is installed to be moved up and down inside the guide tube 153, and the detection according to the surface of the sewer pipe Floating body 158 to provide buoyancy to move the rod 155 up and down, and to transmit the buoyancy of the floating body 158 to the sensing rod 155 and the sensing rod 155 is rotatable The lever 157 is comprised.

In the chlorine ion meter 150 of the present invention, the guide tube 153 is installed to extend vertically from the lower surface of the main body 151 and the coupling means 430 for fixing to the sewer pipe or manhole on its outer peripheral surface It is provided with one or more guide grooves 321 vertically up and down.

A lever 157 penetrates the guide groove 321 of the guide tube 153. An inner end of the lever 157 penetrating the guide groove 321 is fixed to a side of the sensing rod 155 and is positioned outside the guide groove 321. The stage is fixed to the upper surface of the floating body 158. At this time, the lever 157 is preferably bent downward so that the floating body 158 can contact the water surface of the sewer pipe. Thus, the lever 157 forms a "c" shape as a whole.

6, the ion rod 252, the comparison electrode 254, and the temperature sensor 256 are installed in the circular metal tube 551, and the lower end thereof is exposed to the outside, as shown in FIG. 6. It is sealed by filling the epoxy (552) and the like in the positioned state. And the upper end of the sensing rod 155 is provided with a wire 251 connecting the ion electrode 252, the comparison electrode 254 and the temperature sensor 256 and the potentiometer 230, the wire 251 is Coil-shaped cord 253 is connected to freely move the sensing rod 155.

And, the lower end of the sensing rod 155 is exposed to the outside air bubbles or to clean the lower end of the ion electrode 252, the comparison electrode 254 and the temperature sensor 256 is easily contaminated by foreign matter in the sewage A spray nozzle 259 for spraying the washing liquid is installed. In addition, the sensing rod 155 is provided with a tube 258 through which the cleaning liquid supplied through the high-pressure air supplied from the air pump 240 installed in the main body 151 or the external injection pipe 241 is provided. The injection nozzle 259 is connected to a lower end of the tube 258, and a coil 257 is connected to an upper end of the tube 258 to freely move the sensing rod 155.

On the other hand, at the lower end of the sensing rod 155, foreign matter coming down with the sewage collides with the lower end of the sensing rod 155 to damage the ion electrode 252, the comparison electrode 254 and the temperature sensor 256. A protection net 159 is installed to prevent. The guard net 159 is formed with a plurality of slits 592 so as not to disturb the flow of sewage, the top of which is firmly fixed to the outer peripheral surface of the sensing rod 155.

6 and 7, the potentiometer 230 converts the amplified potential difference value into an amplifier 233 that amplifies the potential difference sensed by the ion electrode 252 and the comparison electrode 254. An analog-digital converter 234, a control unit 231 for calculating the chlorine ion concentration based on the potential difference value and controlling the overall potentiometer, and a display unit connected to the control unit 231 to display the chlorine ion concentration to the outside. (232: FIG. 6), a memory 235 connected to the control unit 231 to store the chlorine ion concentration together with the measurement time, and providing information on the ion concentration measurement time or driving the air pump 240 described above. A timer 236 for controlling time, an input / output port 237 for inputting an external signal to the controller 231 or outputting data recorded in the memory to the outside, and measuring the measured chlorine ion concentration data. A communication unit 238 for transmitting to the server or receiving a signal from the main server, a temperature sensor 256 connected to the control unit 231 to measure the temperature of the sewage, and air for driving the air pump 240 The pump driving unit 242, the control unit 231 and the air pump driving unit 242 is configured to include a power supply unit 239 to supply power. And reference numerals 261 and 262 denote communication lines and power lines.

8A and 8B are schematic views showing examples of two methods for installing a fixed chlorine ion meter according to the present invention in a sewer pipe.

First, FIG. 8A shows that the flange 410 is different from the sewage pipe 400 by installing the T-shaped pipe 420 or by drilling a hole in the upper part of the sewage pipe 400 and installing the flange 410 around the sewage pipe 400. The chlorine ion meter 150 having a coupling flange 430 corresponding to the flange 410 is screwed to engage. The sensing rod 155 of the chlorine ion meter 150 is installed to be located inside the sewage pipe through a hole formed in the T-type pipe 420 or the sewage pipe. In this case, the main body 151 including the potentiometer 230 is located outside the sewer pipe 400, and the potentiometer 230 of the main body 151 is connected to the main server 140 through the signal line 261 and the power line 262. ).

8B illustrates a bracket 470 having a cylindrical fixing part 460 for fixing the guide tube 153 of the chlorine ion meter 150 on the side wall of the manhole 450, and the fixing part ( The guide tube 153 of the chlorine ion meter 150 is fixed to the 460 so that the lower end of the sensing rod 155 installed inside the guide tube 153 is immersed in the sewage flowing through the manhole. In this case, the main body 151 including the potentiometer 230 is positioned inside the manhole 450, and a display unit 232 is installed at one side of the main body 151. In addition, the other side of the main body 151 is connected to the signal line 261 and the power line 262, an input / output port 237 to which portable communication equipment such as a laptop, PDA, or portable USB drive is connected, and a cleaning liquid or high pressure air. An injection tube 241 for injecting is installed.

Therefore, the chlorine ion measuring device 150 according to the present invention can input and output data through a portable communication device even when communication with the main server 140 is interrupted, and when a foreign substance is caught in the ion electrode or the temperature sensor, the portable washing machine ( (Not shown) may be connected to the external injection tube 241 to inject washing liquid or air at a high pressure from the outside.

9A and 9B are explanatory diagrams for showing the features of the chlorine ion meter 150 according to the present invention. First, referring to FIG. 9A, in the chlorine ion meter 150 according to the present invention, the sensing rod 155 moves up and down with the floating body 158 according to the fluctuation of the sewer pipe level. 155) to always remain locked under the surface of the water. To this end, the sensing rod 155 is fixed to the inner end of the lever 157 that moves along the guide groove 321 of the guide tube 153, and a predetermined buoyancy force is applied to the outer lower end of the lever 157. The floating body 158 which has is provided. At this time, the floating body 158 is made of a shape and size that does not interfere with the flow of sewage.

In addition, referring to Figure 9b, the sensing rod 155 of the chlorine ion meter 150 according to the present invention, when foreign matters, such as branches flowing down the sewage hit the bottom of the sensing rod 155, The sensing rod 155 is configured to rotate backwards to absorb the impact force. To this end, two guide grooves 321 are correspondingly installed in the guide tube 153, and inner ends of the lever 157 penetrating the guide grooves 321 are fixed to both sides of the sensing rod 155. In addition, two buoyancy bodies 158 are correspondingly installed on both outer sides of the lever 157 to rotate about the horizontal portion of the lever 157. At this time, the diameter of the guide tube 143 is preferably larger than the sensing rod 155 is sufficiently large.

As described above, the main server according to the present invention is a microcomputer to measure the chlorine ion concentration and flow rate data measured in real time through a plurality of chlorine ion meter 150 and the flow meter 160 installed in each detection zone (M) Input to the processor, the microprocessor runs a program to compare the existing chlorine ion concentration and flow rate data stored in the database, for example, the data measured at the same time on another day or the average data accumulated over a certain period of time By determining whether the chlorine ion concentration or the flow rate of the sewage fluctuates rapidly, the point where the sewage water quality and the flow rate fluctuate is traced. In this case, a mobile chlorine ion meter may be used to accurately identify the positions of the influent and the influent. Subsequently, the microprocessor retrieves distance data from the database 190 to the sewage treatment plant 110 in each monitoring zone M, and the sewage discharged from each monitoring zone M at some time. At the same time to predict whether or not to reach the sewage treatment plant 110, the degree of pollution of the incoming sewage flowing into.

Meanwhile, the sewage treatment plant management server 13 connected to the main server 140 through a communication means constitutes the sewage treatment apparatus 120 based on the pollution degree and the flow rate of the inflow sewage predicted and notified by the main server 140. Various valves and motors are operated to select an appropriate operation method. As described above, the present invention can determine the pollution degree of sewage more precisely by measuring the water quality of the sewage flowing into the sewage treatment plant using a plurality of chlorine ion measuring devices 150, and the inflow and intrusion through the sudden fluctuations in the water quality. The presence and location of the water can be easily identified, and the use of the relatively expensive flow meter 160 can be minimized, thereby reducing the cost of constructing the water quality monitoring system, and upstream of each monitoring area M. By installing 150, it is possible to accurately predict the pollution degree and the flow rate of the influent sewage flowing into the sewage treatment plant 110 at an early stage.

Sewage treatment plant control method and system using the chlorine ion concentration in the sewage pipe according to the present invention, a plurality of chlorine ion measuring device for measuring the chlorine ion concentration in the sewage in real time on the sewer pipe, the chlorine measured by each chlorine ion meter By predicting the pollution level of sewage flowing into the sewage treatment plant in advance based on the ion concentration, the sewage treatment plant is controlled in response to fluctuations in the water quality and flow rate of sewage, thereby preventing the sewage from being discharged or reducing the treatment efficiency. .

The present invention also divides the treatment area of the entire sewage pipe into a plurality of monitoring areas in consideration of morphological characteristics and land use characteristics, and a chlorine ion measuring device capable of continuously measuring the concentration of chlorine ions in the sewage on the sewer line of each monitoring area. It is possible to provide a system that can monitor the water quality in sewage pipes while minimizing the use of expensive equipment. .

In addition, the present invention is fixed on the sewage pipe can selectively measure the concentration of chlorine ions in the sewage, and can transmit the measured chlorine ion concentration data to a remote location, free to move up and down depending on the surface of the sewage pipe or contained in the sewage A chlorine ion measuring device capable of preventing damage to an ion electrode or the like by rotating when it collides with a foreign material and buffering its impact force can be provided.

In addition, the chlorine ion meter according to the present invention provides a chlorine ion meter capable of measuring the water quality more accurately and extending the life of the sensing sensor by washing the tip of the sensing rod using high pressure air or a washing liquid.

Claims (10)

In a sewage treatment area of a predetermined area including at least one sewage treatment plant, It is installed on sewage conduits in a number of monitoring zones that are partitioned in consideration of the morphological characteristics and land use characteristics of sewage pipes, and measures the chlorine ion concentration in the sewage and transmits the measured chlorine ion concentration data to remote locations through wired / wireless communication means. A chlorine ion meter; A flow rate measuring device installed at the most downstream of the sewage pipe in each monitoring area to measure the flow rate of the sewage and transmit the measured flow rate data to a remote location through a wired or wireless communication means; The chlorine ion meter and the flow meter are connected to each other through wired and wireless communication means, and store the chlorine ion concentration data received from the chlorine ion meter and determine the change in water quality in comparison with the comparative chlorine ion concentration stored in the database. In addition, the flow rate data received from the flow meter is stored and the flow rate is determined in comparison with the comparative flow rate stored in the database, and the inflow sewage flowing into the sewage treatment plant is considered in consideration of the distance from each monitoring area to the sewage treatment plant. A main server for evaluating the water quality and the flow rate of the water, and storing the result and outputting the result to a remote location; Is connected to the main server via a wired or wireless communication means, sewage pipes characterized in that it comprises a sewage treatment plant management server for controlling the operation of the sewage treatment device according to the water quality and flow rate of the inflow sewage transmitted from the main server Sewage treatment plant control system using chlorine ion concentration. The method of claim 1, The chlorine ion meter may include a main body including a case including a communication unit and a potentiometer therein; A cylindrical guide tube extending vertically from the lower surface of the main body and having a coupling means for fixing to a sewer pipe or a manhole on an outer circumferential surface thereof and having guide grooves formed vertically vertically; The inner end of the lever installed through the guide groove is fixed to the inside of the guide tube so as to move up and down along the guide groove formed in the guide tube, and inside the ion tube electrically connected to a potentiometer inside the body. A sensing rod provided with an electrode, a comparison electrode and a temperature sensor, respectively; A floating body installed at an outer lower end of the lever penetrating through the guide groove of the guide pipe to provide buoyancy so that the sensing rod moves up and down according to the surface of the sewer pipe; An injection nozzle installed at the bottom of the sensing rod to spray air bubbles or a cleaning liquid to clean the ion electrode, the comparison electrode, and the temperature sensor exposed to the outside; Sewage treatment plant control system using a chlorine ion concentration in the sewage pipe, characterized in that it is installed to cover the lower end of the sensing rod is configured to include a protection net to prevent the lower end of the sensing rod is damaged by the foreign matter floating with the sewage. The method of claim 2, The potentiometer may be an amplifier for amplifying a potential difference detected by an ion electrode and a comparison electrode, an analog / digital converter for converting an amplified potential difference value into a digital value, and calculating a chlorine ion concentration based on the potential difference value to control the entire potentiometer. A control unit, a display unit connected to the control unit to display the chlorine ion concentration to the outside, a memory connected to the control unit to store the chlorine ion concentration together with the measurement time, and information on an ion concentration measurement time or Timer for controlling the driving time, input and output ports for inputting an external signal to the control unit or outputting the data recorded in the memory to the outside, and a signal for transmitting the measured chlorine ion concentration data to the main server or from the main server Communication unit for receiving the, and to drive the air pump Sewage treatment plant control system using a chlorine ion concentration in the sewage pipe, characterized in that it comprises an air pump drive unit, a power unit for supplying power to the control unit and the air pump drive unit. The method of claim 2, The sensing rod has an ion electrode, a comparison electrode, and a temperature sensor installed inside a circular metal tube, and is filled with epoxy in the state where the bottom thereof is exposed to the outside, and the ion rod, the comparison electrode, and the temperature are sealed at the top. A sewage treatment plant control system using chlorine ion concentration in a sewage pipe, characterized in that the wire connecting the sensor and the potentiometer is connected by a cord of a coil type. The method of claim 2, The injection nozzle is connected to an air pump installed inside the main body through a tube installed inside the sensing rod, and a chlorine ion in the sewage pipe, characterized in that the injection tube for injecting the cleaning liquid or air from the outside is in communication with one side of the tube; Sewage treatment plant control system using concentration. In the method of controlling the sewage treatment plant using chlorine ion concentration in the sewage pipe, Installing a plurality of chlorine ion meters on the sewage pipe in each monitoring area divided into a plurality of unit monitoring zones in consideration of the shape of the sewage pipe and the characteristics of the residential environment, and installing a flow meter downstream of each monitoring area; When the chlorine ion concentration data and the flow rate data measured by the chlorine ion meter and the flow meter of each monitoring area are transmitted to a remote main server, the main server stores the chlorine ion concentration data received from the chlorine ion meter in a database. Determine the variation of the water quality against the comparative chlorine ion concentration, and compare the flow rate data received from the flow meter with the comparative flow rate stored in the database, and determine the variation of the flow rate, and the distance from each monitoring area to the sewage treatment plant. Evaluating the quality and flow rate of the influent sewage flowing into the sewage treatment plant, and storing the result and transmitting the result to a remote site; According to the water quality and flow rate of the inflow sewage transmitted from the main server to control the operation of various valves and pumps constituting the sewage treatment device in the sewage treatment plant management server to switch to the sewage treatment device operation method suitable for the water quality and flow rate of the incoming raw water Method for controlling the sewage treatment plant using chlorine ion concentration in the sewage pipe, characterized in that consisting of steps. In the chlorine ion measuring device installed on the sewage pipe to measure the chlorine ion concentration in the sewage and transmit the measured chlorine ion concentration data to the remote place through wired / wireless communication means, The chlorine ion meter may include a main body including a case including a communication unit and a potentiometer therein; A cylindrical guide tube extending vertically from the lower surface of the main body and having a coupling means for fixing to a sewer pipe or a manhole on an outer circumferential surface thereof and having guide grooves formed vertically vertically; The inner end of the lever installed through the guide groove is fixed to the inside of the guide tube so as to move up and down along the guide groove formed in the guide tube, and inside the ion tube electrically connected to a potentiometer inside the body. A sensing rod provided with an electrode, a comparison electrode, and a temperature sensor, respectively; A floating body installed at an outer lower end of the lever penetrating through the guide groove of the guide pipe to provide buoyancy so that the sensing rod moves up and down according to the surface of the sewer pipe; Chlorine ion measurement device is installed to surround the lower end of the sensing rod, characterized in that it comprises a protective net to prevent the lower end of the sensing rod is damaged by foreign matter floating with the sewage. The method of claim 7, wherein The chlorine ion measuring device includes a spray nozzle which is installed to protrude from the lower end of the sensing rod and sprays air bubbles or cleaning liquid toward the ion electrode, the comparative electrode and the temperature sensor; Chlorine ion measurement device further comprises a washing means connected to the injection nozzle and penetrating the inside of the sensing rod, the tube communicating with the air pump installed in the interior of the main body. The method of claim 7, wherein The potentiometer may be an amplifier for amplifying a potential difference detected by an ion electrode and a comparison electrode, an analog / digital converter for converting an amplified potential difference value into a digital value, and calculating a chlorine ion concentration based on the potential difference value to control the entire potentiometer. A control unit, a display unit connected to the control unit for displaying the chlorine ion concentration to the outside, a communication unit for transmitting the measured chlorine ion concentration data to the main server or receiving a signal from the main server, and a power supply unit for supplying power Chlorine ion meter, characterized in that configured. The method of claim 7, wherein The lever is installed through two guide grooves formed in the guide tube, and an inner end thereof is fixed to both sides of the sensing rod, respectively, and two buoyancy bodies are correspondingly installed at the outer end of the lever to center the horizontal part of the lever. Chlorine ion meter, characterized in that capable of buffering the external force by rotating.

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