KR20100012535A - Chlorine automatic system - Google Patents

Chlorine automatic system Download PDF

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KR20100012535A
KR20100012535A KR1020080073981A KR20080073981A KR20100012535A KR 20100012535 A KR20100012535 A KR 20100012535A KR 1020080073981 A KR1020080073981 A KR 1020080073981A KR 20080073981 A KR20080073981 A KR 20080073981A KR 20100012535 A KR20100012535 A KR 20100012535A
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chlorine
post
residual
amount
treatment
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KR1020080073981A
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Korean (ko)
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KR101042243B1 (en
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오이석
현상철
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주식회사 한힘테크놀러지
오이석
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/16—Nitrogen compounds, e.g. ammonia
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/005—Processes using a programmable logic controller [PLC]
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/29—Chlorine compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/04—Disinfection

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)

Abstract

PURPOSE: An automatic chlorine-control system of a composite control mode is provided to automatically adjust the input amount of chlorine by comparing the goal amount of residual chlorine by measuring the residual chlorine in a water purification plant. CONSTITUTION: An automatic chlorine-control system of a composite control mode comprises a water collecting plant(1), a gauging well(2), and a mixing tank(3). A pre-chlorination part(400) includes a flowmeter(11) and an ammoniacal nitrogen measuring device(12). A post-chlorination part(500) comprises a filter basin(6) and a purification basin(7) with a post-chlorine injector(18). A PLC controller(10) controls the input amount of the pre-chlorine and the input amount of the post-chlorine.

Description

복합제어방식의 염소자동화시스템{chlorine automatic System}Chlorine automatic system of complex control method

본 발명은 복합(피드백)제어방식을 이용한 염소자동화시스템 및 그 방법에 관한 것으로, 보다 구체적으로는 상수원의 원수 수질을 개선하기 위해 정수장의 잔류염소량을 측정하여 그 정수장에 포함된 유량, 수질변화에 따른 잔류 염소량을 측정하여 목표 잔류염소량과 비교 연산함으로써, 염소 투입량을 자동으로 조절하도록 제어하는 복합제어방식의 염소자동화시스템에 관한 것이다.The present invention relates to a chlorine automation system using a complex (feedback) control method and a method thereof, and more particularly, to measure the amount of residual chlorine in a water purification plant in order to improve the quality of raw water. The present invention relates to a chlorine automation system of a combined control method for controlling to automatically adjust the amount of chlorine input by measuring the amount of residual chlorine according to the result and comparing it with a target amount of residual chlorine.

일반적으로, 정수장에서 소독공정이라 함은 병원성 미생물 제거에 일차적인 목적이 있는 것으로, 물속의 병원성 미생물의 의한 질병을 일으키지 않을 정도까지 미생물을 제거한다는 면에서 병원균을 사멸시키는 멸균과는 차이가 있다.In general, the disinfection process in a water purification plant has a primary purpose to remove pathogenic microorganisms, which is different from sterilization which kills pathogens in that it removes microorganisms to the extent that it does not cause disease caused by pathogenic microorganisms in water.

이러한 소독공정은 두 가지로 구분될 수 있는데, 미생물을 일정농도 이하로 제거하는 일차소독과 급배수관망에서 미생물의 재증식을 억제하는 이차소독으로 분류할 수 있다. 이에 근거하여 국내 정수장의 염소를 투입하는 과정은 전염소 투입과 후염소 투입으로 분류될 수 있다.This disinfection process can be divided into two types, primary disinfection to remove microorganisms below a certain concentration and secondary disinfection to inhibit the re-growth of microorganisms in the supply and drain pipe network. Based on this, the process of introducing chlorine in domestic water treatment plant can be classified into pre-chlorine input and post-chlorine input.

따라서, 이들 두 가지 과정을 통해 정수장의 원수수질을 개선하려고 하는 지 속적인 노력이 행해져 오고 있다. 그러나, 갈수기, 해빙기, 강우시 불규칙한 원수 수질에 따른 전염소 투입률 관리가 힘들고, 특히 상류 다목적댐의 저수량 부족시 댐의 방류랑이 일정량 이하로 감소되어 원수수질이 일시적으로 3급수로 저하되는 경우도 발생하고 있을 뿐만 아니라 생활하수에 의한 NH3-N 오염 농도가 심하여 정수처리의 첫 공정이라 할 수 있는 원수 전염소 처리에 많은 어려움을 겪고 있다.Therefore, continuous efforts have been made to improve the raw water quality of water purification plants through these two processes. However, it is difficult to manage the total chlorine input rate due to irregular raw water quality during the dry season, thawing period, and rainfall, and in particular, when the water shortage of the upstream multi-purpose dam is insufficient, the dam's ditch is reduced to a certain amount or less, and the raw water quality is temporarily lowered to third grade water. Not only that, but the concentration of NH 3 -N pollution by domestic sewage is severe, there are many difficulties in treating raw chlorine, which is the first process of water treatment.

또한, 한강수계 주변의 지속적인 산업 활동과 오수유입을 통해 호수내 유기물 및 영양염류가 지속적으로 축적됨에 따라 부영양화가 심화되고 있으며, 이 부영양화된 호소수를 상수원으로 이용시 조류의 낮은 비중, 높은 음전하, 조류에 의해 기인하는 유기물질(AOM:algogenic organic matter)에 의한 응집 저해, 플럭 침강성 악화에 따른 여과지 폐색, 맛과 냄새 등 심미적 수질저하와, 소독부산물(DBPs:disinfection by products)의 생성에 따른 공중보건상의 위협을 초래한다.In addition, eutrophication is intensifying as the organic matter and nutrients accumulate in the lake through continuous industrial activities and sewage inflows around the Han River. The eutrophicated lake water is used as a water source for low specific gravity, high negative charge and algae. Inhibition of coagulation by AOM (algogenic organic matter), filter paper blockage due to deterioration of floc sedimentation, deterioration of aesthetic water quality such as taste and odor, and public health due to production of disinfection by products (DBPs) Poses a threat.

일부 정수장에서 대량 조류 발생시 정수장애를 해결하기 위하여, 염소투입량을 수동으로 조절하여 투입하는 방식인 전염소 및 오존처리에 의한 전산화처리를 강화하고 있으나, 과도한 산화제의 투입은 조류 세포벽을 파괴시켜 세표내부의 유기물질인IOM(interacellular organic matter)과 조류의 독성성분이 함께 수중으로 용출되어 수중의 DOC(dissolved organic carbon)농도 증가와 염소 소독시 소독부산물질 생성을 가중시키고, 반대로, 염소의 과소 투입으로 인해 정수장에서 살균소독 작용을 규정대로 하지 못하는 등의 문제점이 있었다.In some water treatment plants, in order to solve the water impairment in the case of large algae, the chlorine input is controlled by the chlorine and ozone treatment, which is a method of manually adjusting the amount of chlorine input. The interacellular organic matter (IOM) and the toxic constituents of algae are eluted together to increase the concentration of dissolved organic carbon (DOC) in the water and to disinfect byproducts during chlorine disinfection. There was a problem, such as failing to disinfect the sterilization action in the water purification plant.

즉, 전처리염소는 유량 비례에 따른 염소 투입량을 수동으로 조절하기 때문 에, 유량에 따른 염소의 정확한 농도를 전처리 염소투입에 어려울 뿐만 아니라, 외부로부터 유입되는 원수수질의 변화에 따른 암모니아성 질소 등의 급격한 변화에 있어서도 대응하기 어려운 것은 마찬가지였다.In other words, since pretreatment chlorine manually adjusts the chlorine input rate according to the flow rate, it is not only difficult for the pretreatment of chlorine to be accurately adjusted according to the flow rate, but also ammonia nitrogen due to the change of raw water quality from the outside. The same was true for the rapid change.

그리고 이러한 문제는 전처리염소를 지나 소독 공정이 이루어지는 후처리염소가 행해지는 정수지에 있어서도 여전히 발생되어 오고 있다.And such a problem still arises in the purified water in which the post-processing chlorine which disinfection process passes after a pre-processing chlorine is performed.

따라서, 상기와 같은 종래의 염소투입량 조절 방식의 문제점을 해결하고자 안출된 것으로, 본 발명은 전처리염소 처리부의 혼화지, 중간염소 처리부의 여과지, 후처리염소 처리부의 정수지에서 각각 측정된 잔류염소량을 PLC제어기에 의해 설정된 각각 염소목표치와 비교하고, 암모니아성 질소 및 유량에 근거한 염소 투입량을 산출하고, 그 산출된 염소 투입량만큼 자동으로 각 공정에 염소를 투입함으로써, 원수의 수질변화에 능동적으로 대응할 뿐만 아니라, 실시간으로 잔류염소의 투입 편차가 항상 일정하게 유지되도록 제어 가능한 복합제어방식의 염소자동화시스템을 제공한다.Therefore, to solve the problems of the conventional chlorine dosage control method as described above, the present invention is the amount of residual chlorine measured in the mixed paper of the pre-chlorine treatment unit, the filter paper of the intermediate chlorine treatment unit, the purified water of the post-treatment chlorine treatment unit PLC Compared to the target chlorine value set by the controller, calculating the chlorine input amount based on ammonia nitrogen and flow rate, and automatically adding chlorine to each process by the calculated chlorine input amount, thereby not only actively responding to changes in the water quality of raw water In addition, it provides a chlorine automation system with a complex control method so that the deviation of the input of residual chlorine is always maintained in real time.

상술한 목적을 달성하기 위한 본 발명은 복합제어방식의 염소자동화시스템에 있어서, 취수탑을 포함하는 취수장과, 상기 취수장과 배관 연결되며 전염소 투입기 가 구비된 착수정과, 상기 착수정의 후단에 형성되며 제 1잔류염소 측정기가 설치된 혼화지로 이루어지되, 상기 취수장과 상기 착수정 사이에 연결되는 배관에는 유량을 측정하는 유량계 및 상기 암모니아성 질소의 농도를 측정하는 암모니아성 질소 측정기가 설치되는 전처리염소 처리부와, 상기 전처리염소 처리부에 연결되는 여과지와, 상기 여과지와 배관 연결되며 그 후단에 정수지로 구비되는 송수관으로 이루어지고, 상기 여과지와 상기 정수지 사이의 배관에 후처리염소 투입기가 구비되며, 상기 송수관에는 제 3잔류염소 측정기가 설치되는 후처리염소 처리부와, 상기 제 1잔류염소 측정기에 의해 측정된 전처리잔류염소와 미리 설정된 전처리염소목표치를 비교 연산하여 상기 전처리염소 처리부에 투입되는 전처리염소 투입량을 제어하며, 상기 제 3잔류염소 측정기에 의해 측정된 후처리잔류염소와 미리 설정된 후처리염소목표치를 비교 연산하여, 상기 후처리염소 처리부에 투입되는 후처리염소 투입량을 제어하는 PLC제어기를 포함하는 것을 특징으로 한다.The present invention for achieving the above object is a chlorine automated system of the combined control method, the intake station including the intake tower, the intake well connected to the intake pipe and equipped with an all-chlorine injector, and formed in the rear end of the impregnation well 1, a pre-chlorine treatment unit comprising a mixed paper installed with a residual chlorine measuring device, a flow meter for measuring the flow rate and an ammonia nitrogen measuring device for measuring the concentration of the ammonia nitrogen in the pipe connected between the water intake and the water well; It consists of a filter paper connected to the pretreatment chlorine treatment unit, and the water pipe is connected to the filter paper and provided as a purified water at the rear end, and a post-processing chlorine injector is provided in the pipe between the filter paper and the purified water, and the water supply pipe has a third residue. Post-processing chlorine treatment unit equipped with a chlorine measuring unit, and the first residual chlorine After comparing the pre-treatment residual chlorine measured by the measuring device with a predetermined pre-treatment chlorine target value to control the pre-treatment chlorine input to the pre-treatment chlorine processing unit, and after the pre-treatment chlorine measured by the third residual chlorine measuring instrument And a PLC controller for comparing and calculating the target chlorine target value to control the amount of post-treatment chlorine introduced into the post-treatment chlorine treatment unit.

본 발명에 의하면, 복합제어방식의 염소자동화 시스템을 이용하여 혼화지, 여과지, 정수지에서 각각 측정된 잔류염소량과, PLC제어기에 의해 미리 설정된 염소목표치를 비교하고, 그 비교 결과에 암모니아성 질소와, 유량을 고려하여 각 처리부에 투입될 염소 투입량을 산출하고, 그 산출된 염소 투입량을 각 처리부에 일정하게 자동 투입함으로써, 원수의 수질변화에 능동적으로 대응할 뿐만 아니라, 실시간으로 염소목표치에 의해 항상 일정하게 유지되도록 할 수 있다.According to the present invention, the amount of residual chlorine measured in mixed paper, filter paper, and purified water using the chlorine automation system of the combined control method is compared with the target chlorine value set in advance by the PLC controller, and the ammonia nitrogen, By taking into account the flow rate, the amount of chlorine to be added to each treatment unit is calculated, and the calculated amount of chlorine is automatically added to each treatment unit constantly, thereby not only actively responding to changes in the water quality of raw water, but also constantly by the chlorine target value in real time. Can be maintained.

이하, 첨부된 도면을 참조하여 본 발명의 실시 예 1 및 2에 대해 상세히 설명하면 다음과 같다.Hereinafter, exemplary embodiments 1 and 2 of the present invention will be described in detail with reference to the accompanying drawings.

실시예 1Example 1

도 1은 본 발명에 따른 복합제어방식의 염소자동화시스템의 개략적인 구성도이다.1 is a schematic configuration diagram of a chlorine automation system of a hybrid control method according to the present invention.

도 1에 도시된 바와 같이, 본 발명은 상수원으로부터 유입되는 원수 수질을 개선하기 위하여, 염소를 투입하는 소독 공정은 전처리 과정과 후처리 과정으로 나눌 수 있다. 따라서 본 발명의 제1실시 예에 따른 복합제어방식의 염소자동화시스템은 전처리염소 처리부(400), 후처리염소 처리부(500)로 구성된다. As shown in Figure 1, the present invention, in order to improve the quality of the raw water flowing from the water source, chlorine disinfection process can be divided into pre-treatment and post-treatment process. Therefore, the chlorine automation system of the complex control method according to the first embodiment of the present invention is composed of a pre-treatment chlorine processing unit 400, a post-treatment chlorine processing unit 500.

먼저, 전처리염소 처리부(400)는 상수원으로부터 유입되는 원수를 취수하는 취수탑을 포함하는 취수장(1)과, 그 취수장(1)과 배관 연결되며 내부 저장된 원수를 소독하기 위해 염소를 투입하는 것이 가능한 전처리염소 투입기(16)를 구비한 착수정(2)과, 그 착수정(2)의 후단에 바로 형성되며 상기 착수정(2)으로부터 유입되는 원수에 전처리잔류염소가 어느 정도 포함되어 있는지를 측정하는 제 1잔류염소 측정기(13)가 설치된 혼화지(3)로 이루어진다.First, the pretreatment chlorine treatment unit 400 is a water intake (1) including a water intake tower for taking in the raw water flowing from the water supply source, and the water intake (1) is connected to the pipe and pretreatment capable of injecting chlorine to disinfect the raw water stored therein A first residue having a chlorine injector 16 and a first residue immediately formed at the rear end of the landing well 2 and measuring the extent to which pretreated residual chlorine is contained in the raw water flowing from the landing well 2. It consists of the mixed paper 3 in which the chlorine measuring device 13 was installed.

또한, 취수장(1)과 착수정(2)을 연결하는 배관에는 원수의 유량을 측정하는 유량계(11)가 설치되어 있고, 또 유량에 포함된 암모니아성 질소의 농도를 측정하는 암모니아성 질소 측정기(12)가 설치되어 있다.In addition, a pipe connecting the water intake 1 and the water well 2 is provided with a flow meter 11 for measuring the flow rate of the raw water, and an ammonia nitrogen measuring instrument 12 for measuring the concentration of ammonia nitrogen contained in the flow rate. ) Is installed.

그러므로 전처리염소 처리부(400)에서는 유량계(11) 및 암모니아성 질소 측정기(12)를 통해 수질 오염 농도를 측정하는 것이 가능하고, 이하 설명될 PLC제어기(10)에 의해 미리 설정된 전처리염소목표치와 제 1잔류염소 측정기(13)에 의해 측정된 전처리잔류염소를 비교하여 착수정(2)에 투입하는 전처리염소 투입량을 조절하는 것이 가능하다.Therefore, in the pretreatment chlorine treatment unit 400, it is possible to measure the water pollution concentration through the flow meter 11 and the ammonia nitrogen measuring unit 12, and the pretreatment chlorine target value and the first pretreatment set by the PLC controller 10 to be described below. It is possible to adjust the amount of pretreatment chlorine introduced into the impingement well 2 by comparing the pretreatment residual chlorine measured by the residual chlorine measuring device 13.

그리고 후처리염소 처리부(500)는 전처리염소 처리부(400)의 혼화지(3)와 그 일단이 배관 연결되는 여과지(6)와, 그 후단에 송수관(9)을 구비하는 정수지(7)로 이루어진다.The post-treatment chlorine treatment unit 500 includes a mixed paper 3 of the pretreatment chlorine treatment unit 400, a filter paper 6 having one end connected to a pipe, and a purified water 7 having a water supply pipe 9 at a rear end thereof. .

또한, 여과지(6)와 정수지(7) 사이의 배관에는 후처리염소 투입기(18)가 구비되어 있고, 정수지(7)의 후단에 구비된 송수관(9)에는 제 3잔류염소 측정기(14)가 설치되어 정수지(7)로 유입되는 후처리잔류염소량과 이하 설명될 PLC제어기(10)에 의해 미리 설정된 후처리염소목표치를 비교하여 여과지(6) 집수정에 투입하는 후처리염소 투입량을 조절하는 것이 가능하다.In addition, the post-processing chlorine injector 18 is provided in the piping between the filter paper 6 and the purified water 7, and the third residual chlorine measuring device 14 is provided in the water supply pipe 9 provided at the rear end of the purified water 7. By adjusting the amount of post-treatment chlorine introduced into the purified water (7) with the post-treatment chlorine target value set in advance by the PLC controller (10) to be described below to adjust the amount of post-treatment chlorine introduced into the filter paper (6) sump. It is possible.

이와 같은 염소자동화시스템이 복합제어를 행하기 위해서는 상술한 PLC제어기(10)를 구비하여야 한다. 특히, 이 PLC제어기(10)는 각각의 처리부(400, 500)에 염소투입량을 연산하고, 그 산출된 염소투입량에 따른 제어신호(S1, S3)를 각각의 염소 투입기(16, 18)에 송출하여 염소 투입기를 기동시킴으로써, 전처리염소 및 후처리염소의 처리부(400, 500)내의 잔류염소목표치로 조정되도록 제어한다.In order to perform the combined control of such a chlorine automation system, the above-described PLC controller 10 should be provided. In particular, the PLC controller 10 calculates the amount of chlorine input to each of the processing units 400 and 500 and sends control signals S1 and S3 according to the calculated amount of chlorine to the respective chlorine injectors 16 and 18. By starting the chlorine injector, it is controlled to adjust to the target chlorine residual value in the treatment unit 400, 500 of the pre-treated chlorine and the post-treated chlorine.

이하, 본 발명에 따른 복합제어방식의 염소자동화시스템을 이용하여 자동으로 염소를 투입하는 동작순서에 대해 도 2를 참조하여 구체적으로 설명할 것이다.Hereinafter, an operation sequence of automatically introducing chlorine using the chlorine automation system of the hybrid control method according to the present invention will be described in detail with reference to FIG. 2.

도 2는 본 발명에 따른 각 공정별로 염소를 투입하는 과정을 나타내는 플로우 차트이다.2 is a flow chart illustrating a process of adding chlorine for each process according to the present invention.

도 2에 도시된 바와 같이, 먼저 전처리염소 처리부(400)에 있어서, 상수원의 원수가 소독 공정내의 전처리염소 처리부에 구비된 취수탑을 거쳐 취수장(1)으로 유입되고, 이 취수장(1)의 일단으로부터 연장되는 배관을 따라 착수정(2)으로 유입되는 원수의 유입 유량을 유량계(11)를 통해 측정하고(S20), 또한 이 유입된 유량에 포함된 암모니아성 질소의 농도를 암모니아성 질소 측정기(12)를 통해 측정한다.(S21)As shown in FIG. 2, first, in the pretreatment chlorine treatment unit 400, raw water of the water supply is introduced into the intake station 1 through the water intake tower provided in the pretreatment chlorine treatment unit in the disinfection process, and from one end of the intake station 1. The inflow flow rate of the raw water flowing into the landing well 2 is measured through the flow meter 11 (S20), and the concentration of the ammonia nitrogen contained in the inflow flow rate is measured by the ammonia nitrogen meter 12. Measure through (S21)

그 다음, 유량에 포함된 암모니아성 질소의 농도 및 잔류 염소량의 반응 비율에 따라 상수를 산출한다.(S22) 구체적으로, 하기 [반응식 1]에 의해 1분자의 암모니아성 질소를 불활성화 하는데 필요한 염소의 화학적인 소비량 반응 상수를 산출한다.Then, a constant is calculated according to the concentration of ammonia nitrogen contained in the flow rate and the reaction rate of the amount of residual chlorine. (S22) Specifically, chlorine required to inactivate one molecule of ammonia nitrogen by the following [Scheme 1]. Calculate the chemical consumption reaction constant of.

Figure 112008054624654-PAT00001
Figure 112008054624654-PAT00001

[반응식 1]에서와 같이 암모니아성 질소의 농도 및 잔류 염소량의 반응 비율은 1:7.6이고, 이에 따라 상수는 8로 설정되는 것이 좋다. As in [Scheme 1], the reaction ratio between the concentration of ammonia nitrogen and the amount of residual chlorine is 1: 7.6, and therefore, the constant is preferably set to 8.

또한, PLC 제어기(10)에 의해 전처리염소목표치를 미리 설정하고(S23), 전처리염소 처리부(400)의 혼화지(3)에 설치된 제 1잔류염소 측정기(13)를 이용하여 혼화지(3)에 포함된 전처리잔류염소량을 측정한다.(S24)Further, the pretreatment chlorine target value is set in advance by the PLC controller 10 (S23), and the mixed paper 3 is prepared using the first residual chlorine measuring device 13 installed in the mixed paper 3 of the pretreatment chlorine processing unit 400. Measure the amount of residual chlorine contained in the pretreatment (S24).

이 설정된 전처리염소목표치와 제 1잔류염소 측정기(13)에 의해 측정된 전처리잔류염소량을 비교하고(S25), 그 비교 결과 전처리잔류염소량이 전처리염소목표치 이하일 경우, PLC 제어기(10)로부터 송출되는 제어신호(S1)에 의해 전처리염소 투입기(16)를 동작시켜 PLC 제어기(10)에서 유량 및 암모니아성 질소의 농도를 고려하여 연산된 하기의 [수학식 1]에 따른 전처리염소투입량만큼 염소를 투입한다.(S26)The set pretreatment chlorine target value is compared with the pretreatment residual chlorine measured by the first residual chlorine measuring device 13 (S25), and when the result of the comparison is less than the pretreatment chlorine target value, the control is sent out from the PLC controller 10 The pretreatment chlorine injector 16 is operated by the signal S1 to inject chlorine as much as the pretreatment chlorine input according to the following [Equation 1] calculated in consideration of the flow rate and the concentration of ammonia nitrogen in the PLC controller 10. (S26)

m1 = W × [(Nc × 8) + f + Vf+(Vf - Cf)]m 1 = W × [(Nc × 8) + f + V f + (V f -C f )]

여기서, m1:전처리염소 투입량(kg/h), W:유량(㎥/h), Nc:암모니아성 질소의 농도(mg/ℓ), f: 전염소요구량(mg/ℓ), Vf:전처리염소목표치(mg/ℓ), Cf:전처리잔류염소량(mg/ℓ)Where m 1 : pretreatment of chlorine (kg / h), W: flow rate (m 3 / h), Nc: concentration of ammonia nitrogen (mg / l), f: prechlorine requirement (mg / l), V f : Pretreatment Chlorine Target Value (mg / ℓ), C f : Pretreatment Chlorine Content (mg / ℓ)

구체적으로, 전처리염소 투입량은 유량계(11)에 의해 측정된 유량(W)과, 암모니아성 질소 농도 측정계(12)에 의해 측정된 암모니아성 질소 농도(Nc)와, 상기 [반응식 1]에 의한 1분자의 아모니아성 질소 농도를 불활성화 하기 위한 파괴점염소투입을 화학적인 소비량 반응상수(7.6≒8)와, 전처리염소목표치(Vf)와 전처리잔류염소량(Cf)의 편차를 줄이기 위해 피드백 제어 된다.Specifically, the pretreatment chlorine input amount is the flow rate (W) measured by the flow meter 11, the ammonia nitrogen concentration (Nc) measured by the ammonia nitrogen concentration measurement system 12, and 1 according to the above [Scheme 1]. Feed the breakpoint chlorine to inactivate the ammonia nitrogen concentration of the molecule to feed back the chemical consumption response constant (7.6 ≒ 8), and to reduce the variation of the target chlorine target value (V f ) and the pretreatment residual chlorine amount (C f ). Are controlled.

하지만, 유기물과 조류유입을 감안한 전염소요구량(f)은 전염투입지점인 착수정(2)에서 전처리잔류염소 측정지점인 혼화지(3) 까지 20±10분 체류시간이 소요 된 관계로 전처리염소목표치(Vf)와 전처리잔류염소량(Cf)의 반응편차가 발생하나, 이를 줄이기 위해 전염소요구량(f)을 설정치를 추가하여 혼화지(3)에서 전처리잔류염소량이 복합제어 된다.However, the total chlorine demand (f) considering the inflow of organic matter and algae is 20 ± 10 min. Residence time from the taping well (2), which is the contagion point, to the mixed site (3), which is the pretreatment chlorine measurement point. Reaction deviation of (Vf) and pretreatment residual chlorine (Cf) occurs, but the pretreatment residual chlorine is mixed in the mixed paper (3) by adding a prechlorine requirement (f) to reduce this.

반대로, 전처리잔류염소량이 전처리염소목표치 보다 이상일 경우, 제어신호(S11)에 의해 상기 전처리염소 투입기(16)를 정지시켜 전처리염소 투입을 차단한다.(S27)On the contrary, when the amount of pretreated residual chlorine is higher than the target chlorine target value, the pretreatment chlorine injector 16 is stopped by the control signal S11 to block the pretreatment of chlorine.

다음으로, 후처리염소 처리부(500)에 있어서, PLC제어기(10)에 의해 후처리염소목표 치를 미리 설정하고(S33), 후처리염소 처리부(500)의 후단에 구비된 송수관(9)에 설치된 제 3잔류염소 측정기(14)를 이용하여 정수지(7)에 포함된 후처리잔류염소량을 측정한다(S34).Next, in the post-processing chlorine processing unit 500, the post-treatment chlorine target value is set in advance by the PLC controller 10 (S33), and is installed in the water pipe 9 provided at the rear end of the post-processing chlorine processing unit 500. The amount of post-treatment residual chlorine contained in the purified paper 7 is measured using the third residual chlorine measuring device 14 (S34).

이 설정된 후처리염소목표치와 제 3잔류염소 측정기(14)에 의해 측정된 후처리잔류염소량을 비교하고(S35), 그 비교 결과 후처리잔류염소량이 후처리염소목표치 보다 이하일 경우, PLC 제어기(10)로부터 송출되는 제어신호(S3)에 의해 후처리염소 투입기(18)를 동작시켜 PLC 제어기(10)에서 유량을 고려하여 연산된 하기의 [수학식 2]에 따른 후처리염소 투입량만큼 염소를 투입한다.(S36)The set post-treatment chlorine target value and the post-treatment residual chlorine measured by the third residual chlorine measuring unit 14 are compared (S35). When the post-treatment residual chlorine is less than the post-treatment chlorine target value, the PLC controller 10 Chlorine is added as much as the post-processing chlorine input amount according to the following [Equation 2] calculated by considering the flow rate in the PLC controller 10 by operating the post-processing chlorine injector 18 by the control signal S3 sent from (S36)

m3 = W*[f +Vb +(Vb - Cb)]m 3 = W * [f + V b + (V b -C b )]

여기서, m3:후처리염소 투입량(kg/h), W:유량(㎥/h), f:후염소 요구량(mg/ℓ), Vb:후처리염소목표치(mg/ℓ), Cb:후처리잔류염소량(mg/ℓ)Where m 3 : post-treatment chlorine input (kg / h), W: flow rate (m 3 / h), f: post-chlorine demand (mg / l), V b : target post-treatment chlorine (mg / l), C b Post-treatment residual chlorine (mg / ℓ)

상기 후처리염소목표치(Vb)은 송수관(90)의 목표치이다. 본 발명에서는 상기 후처리염소목표치(Vb)를 0.90±0.10mg/ℓ로 설정하였다. The post-treatment chlorine target value Vb is a target value of the water pipe 90. In the present invention, the post-treatment chlorine target value (Vb) was set to 0.90 ± 0.10 mg / l.

반대로, 후처리잔류염소량이 후처리염소목표치 보다 이상일 경우, 제어신호(S3)에 의해 상기 후처리염소 투입기(18)를 정지시켜 후처리염소 투입을 차단한다.(S37)On the contrary, when the amount of post-treatment residual chlorine is higher than the target value of post-treatment chlorine, the post-treatment chlorine injector 18 is stopped by the control signal S3 to block the post-treatment chlorine input.

실시 예2Example 2

도 3은 본 발명의 실시 예2에 따른 중간염소 처리부가 복합제어방식의 염소자동화시스템의 구성도이다.3 is a block diagram of a chlorine automation system of the combined control method of the intermediate chlorine treatment unit according to a second embodiment of the present invention.

도 3은 본 발명의 실시 예1에 따른 복합제어방식의 염소자동화시스템을 이용한 소독 공정 내에 구비된 전처리염소 처리부(600)와, 후처리염소 처리부(800) 사이에 중간염소 처리부를 더 배치하므로, 염소투입에 따른 소독부산물 저감과 불활성화를 이루는 것이다.3 is an intermediate chlorine treatment unit further disposed between the pretreatment chlorine treatment unit 600 and the post treatment chlorine treatment unit 800 provided in the disinfection process using the chlorine automation system of the complex control method according to the first embodiment of the present invention. The reduction and inactivation of disinfection by-products by chlorine injection is achieved.

여기서, 도 1에 도시된 전처리염소 처리부(400)와 후처리염소 처리부(500)에 대한 구성은 도 3에 도시된 전처리염소 처리부(600)와 후처리염소 처리부(800)의 구성과 일반적으로 동일하지만, 그 부호가 상이하므로 이하에서 다시 설명될 것이다.Here, the configurations of the pretreatment chlorine processing unit 400 and the post-treatment chlorine processing unit 500 shown in FIG. 1 are generally the same as those of the pretreatment chlorine processing unit 600 and the post-treatment chlorine processing unit 800 shown in FIG. 3. However, since their signs are different, they will be described again below.

도 3에 도시된 바와 같이, 본 발명은 상수원으로부터 유입되는 원수 수질을 개선하기 위하여, 염소를 투입하는 소독 공정은 전처리염소 처리부(600), 중간염소 처리부(700), 후처리염소 처리부(800)로 나눌 수 있다. As shown in Figure 3, the present invention, in order to improve the quality of the raw water flowing from the water supply, chlorine disinfection process pre-chlorine treatment unit 600, intermediate chlorine treatment unit 700, post-treatment chlorine treatment unit 800 Can be divided into:

먼저, 전처리염소 처리부(600)는 상수원으로부터 유입되는 원수를 취수하는 취수탑을 포함하는 취수장(19)과, 그 취수장(19)과 배관 연결되며 내부 저장된 원수를 소독하기 위해 염소를 투입하는 것이 가능한 전처리염소 투입기(160)를 구비한 착수정(20)과, 그 착수정(20)의 후단에 바로 형성되며 상기 착수정으로부터 유입되는 원수에 잔류염소가 어느 정도 포함되어 있는지를 측정하는 제 1잔류염소 측정기가 설치된 혼화지(30)로 이루어진다.First, the pretreatment chlorine treatment unit 600 is connected to the intake station 19 including a water intake tower for taking in the raw water flowing from the water supply source, and the intake station 19, and pretreatment capable of injecting chlorine to disinfect raw water stored therein. An impregnating well 20 with a chlorine injector 160, and a first residual chlorine meter which is formed immediately at the rear end of the impingement well 20 and measures how much residual chlorine is contained in the raw water flowing from the impingement well is installed. It is made of mixed paper (30).

또한, 취수장(19)과 착수정(20)을 연결하는 배관상에는 원수의 유량을 측정하는 유량계(110)가 설치되어 있고, 또 유량에 포함된 암모니아성 질소의 농도를 측정하는 암모니아성 질소 측정기(120)가 설치되어 있다.In addition, a flowmeter 110 for measuring the flow rate of raw water is provided on the pipe connecting the water intake station 19 and the landing well 20, and an ammonia nitrogen measuring instrument 120 for measuring the concentration of ammonia nitrogen contained in the flow rate. ) Is installed.

그러므로 전처리염소 처리부(600)에서는 유량계(110) 및 암모니아성 질소 측정기(120)를 통해 수질 오염 농도를 측정하는 것이 가능하고, 이하 설명될 PLC제어기(100)에 의해 미리 설정된 전처리염소목표치와 제 1잔류염소 측정기에 의해 측정된 유량에 포함되어 있는 전처리잔류염소량을 비교하여 착수정(20)에 투입하는 전처리염소 투입량을 조절하는 것이 가능하다.Therefore, in the pretreatment chlorine treatment unit 600, it is possible to measure the water pollution concentration through the flow meter 110 and the ammonia nitrogen measuring unit 120, and the pretreatment chlorine target value and the first pretreatment set by the PLC controller 100 to be described below. It is possible to adjust the amount of pretreatment chlorine introduced into the landing well 20 by comparing the amount of pretreatment residual chlorine contained in the flow rate measured by the residual chlorine measuring device.

그리고 중간염소 처리부(700)는 전처리염소 처리부에 투입된 염소량이 부족할 경우, 추가로 염소량을 투입하는 보조적인 수단으로서, 전처리염소 처리부(600)에 연결되는 응집지(40)와, 이 응집지(40)의 후단에 형성되는 침전지(50)와, 상기 침전지(50)와 배관 연결되는 여과지(60)로 이루어진다.The intermediate chlorine treatment unit 700 is a coagulation paper 40 connected to the pretreatment chlorine processing unit 600 as an auxiliary means for additionally adding chlorine when the amount of chlorine added to the pretreatment chlorine treatment unit is insufficient. It consists of a sedimentation basin (50) formed at the rear end of the), and a filter paper (60) connected to the sedimentation basin (50).

또한, 침전지(50)와 여과지(60)의 사이의 배관에는 중간염소 투입기(170)가 구비되어 있고, 여과지(60) 집수정에는 제 2잔류염소 측정기가 설치되어 있어, 여 과지(60)로 유입되는 유량에 포함된 중간잔류염소와 이하 설명될 PLC제어기(100)에 의해 미리 설정된 후처리염소목표치를 비교하여 여과지(60)에 집수정 투입하는 중간염소 투입량을 조절하는 것이 가능하다.In addition, an intermediate chlorine injector 170 is provided in the piping between the sedimentation basin 50 and the filter paper 60, and a second residual chlorine measuring device is installed in the collection basin of the filter paper 60, so as to filter paper 60. By comparing the intermediate residual chlorine contained in the flow rate and the post-treatment chlorine target value set in advance by the PLC controller 100 to be described below, it is possible to adjust the amount of intermediate chlorine to be injected into the filter paper 60.

또, 중간염소 처리부(700)내에서 좀더 정확한 잔류염소량을 측정하기 위해서는 침전지(50)에 추가로 잔류염소 측정기(300)를 설치하는 것이 바람직하다.In addition, in order to more accurately measure the amount of residual chlorine in the intermediate chlorine treatment unit 700, it is preferable to install the residual chlorine measuring unit 300 in addition to the sedimentation basin 50.

하지만, 이러한 중간염소 처리부(700)는 앞에서 언급한 바와 같이 재 산화처리 소독 공정으로서 생략 가능하다.However, the intermediate chlorine treatment unit 700 may be omitted as a re-oxidation disinfection process as mentioned above.

마지막으로, 후처리염소 처리부(800)는 중간염소 처리부(700)에 포함된 여과지(60)와,이 여과지(60)와 배관 연결되며 그 후단에 정수지(70)와 송수관으로 이루어진다.Finally, the post-treatment chlorine treatment unit 800 is connected to the filter paper 60 included in the intermediate chlorine treatment unit 700, the filter paper 60, and the water purification 70 and the water pipe at the rear end thereof.

또한, 여과지(60)와 정수지(70) 사이의 배관에는 후처리염소 투입기(180)가 구비되어 있고, 정수지(70)의 후단에 구비된 송수관(90)에는 제 3잔류염소 측정기(140)가 설치되어 정수지(70)로 유입되는 유량에 포함된 후처리잔류염소량과 이하 설명될 PLC제어기(100)에 의해 미리 설정된 후처리염소목표치를 비교하여 여과지(60)에 집수정에 투입하는 후처리염소 투입량을 조절하는 것이 가능하다.In addition, the post-processing chlorine injector 180 is provided in the piping between the filter paper 60 and the purified water 70, and the third residual chlorine measuring unit 140 is provided in the water supply pipe 90 provided at the rear end of the purified water 70. After-treatment chlorine is added to the collection basin in the filter paper 60 by comparing the amount of post-treatment residual chlorine included in the flow rate introduced into the purified water 70 and the post-treatment chlorine target value preset by the PLC controller 100 to be described below. It is possible to adjust the dosage.

여기서, 만약 중간염소 처리부(700)가 생략될 경우, 후처리염소 처리부(800)는 전처리염소 처리부(600)의 말단과 직접 연결되어 소독 공정이 행해진다.Here, if the intermediate chlorine treatment unit 700 is omitted, the post-treatment chlorine treatment unit 800 is directly connected to the end of the pre-treatment chlorine treatment unit 600 is performed disinfection process.

이러한 염소자동화시스템이 복합제어를 행하기 위해서는 상술한 PLC제어기(100)를 구비하여야 한다. 특히, 이 PLC제어기(100)는 각각의 처리부(600,700, 800)에 투입되는 잔류 염소량을 연산하고, 그 산출된 잔류 염소량에 따른 제어신 호(S11, S112, S13)를 각각의 염소 투입기(160, 170, 180)에 송출하여 염소 투입기를 기동시킴으로써, 각각의 처리부(600,700, 800)내의 잔류염소량이 목표 잔류염소량으로 조정되도록 제어한다.In order to perform the combined control of such a chlorine automation system, the above-described PLC controller 100 should be provided. In particular, the PLC controller 100 calculates the amount of residual chlorine introduced into each of the processing units 600, 700, and 800, and outputs control signals S11, S112, and S13 according to the calculated amount of residual chlorine to each of the chlorine injectors 160. , 170, 180 are sent to start the chlorine injector, so that the amount of residual chlorine in each of the processing units 600, 700, 800 is controlled to be adjusted to the target amount of residual chlorine.

이하, 본 발명에 따른 복합제어방식의 염소자동화시스템을 이용하여 자동으로 염소를 투입하는 동작순서에 대해 도 4를 참조하여 구체적으로 설명할 것이다.Hereinafter, an operation sequence of automatically introducing chlorine using the chlorine automation system of the hybrid control method according to the present invention will be described in detail with reference to FIG. 4.

도 4는 본 발명의 실시 예2에 따른 전처리염소, 중간염소 및 후처리염소 공정에 염소를 투입하는 과정을 나타내는 플로우 차트이다.4 is a flowchart illustrating a process of adding chlorine to a pre-treated chlorine, an intermediate chlorine and a post-treated chlorine process according to Example 2 of the present invention.

도 4에 도시된 바와 같이, 먼저 전처리염소 처리부(600)에 있어서, 상수원의 원수가 소독 공정내의 전처리염소 처리부에 구비된 취수탑을 거쳐 취수장(19)으로 유입되고, 이 취수장(19)의 일단으로부터 연장되는 배관을 따라 착수정(20)으로 유입되는 원수의 유입 유량을 유량계(110)를 통해 측정하고(S200), 또한 이 유입된 유량에 포함된 암모니아성 질소의 농도를 암모니아성 질소 측정기(120)를 통해 측정한다.(S210)As shown in FIG. 4, first, in the pretreatment chlorine treatment unit 600, raw water of a water supply is introduced into the intake station 19 through a water intake tower provided in the pretreatment chlorine treatment unit in the disinfection process, and from one end of the intake station 19. The inflow flow rate of the raw water flowing into the landing vessel 20 along the extending pipe is measured through the flow meter 110 (S200), and the concentration of the ammonia nitrogen contained in the inflow flow rate is measured by the ammonia nitrogen measuring instrument 120. Measure through (S210).

그 다음, 유량에 포함된 암모니아성 질소의 농도 및 잔류 염소량의 반응 비율에 따라 적절한 상수를 산출한다.(S220) 여기서는 암모니아성 질소의 농도 및 잔류 염소량의 반응 비율은 1:7.6이고, 이에 따라 상수는 8로 설정되는 것이 좋다.Then, an appropriate constant is calculated according to the concentration of ammonia nitrogen contained in the flow rate and the reaction rate of the amount of residual chlorine (S220). Here, the reaction ratio of the concentration of ammonia nitrogen and the amount of residual chlorine is 1: 7.6, and thus the constant Is preferably set to 8.

또한, PLC 제어기(100)에 의해 전처리염소목표치를 미리 설정하고(S230), 전처리염소 처리부(600)의 혼화지(30)에 설치된 제 1잔류염소 측정기(130)를 이용하여 혼화지(30)에 포함된 전처리잔류염소량을 측정한다.(S240)In addition, the pretreatment chlorine target value is set in advance by the PLC controller 100 (S230), and the mixed paper 30 is formed by using the first residual chlorine measuring unit 130 installed on the mixed paper 30 of the pretreatment chlorine processing unit 600. Measure the amount of residual chlorine pre-treatment included in (S240).

이 설정된 전처리염소목표치와 제 1잔류염소 측정기에 의해 측정된 전처리잔 류염소량을 비교하고(S50), 그 비교 결과 전처리잔류염소량이 전처리염소목표치 보다 이하일 경우, PLC 제어기(100)로부터 송출되는 제어신호(S1)에 의해 전처리염소 투입기(160)를 동작시켜 PLC 제어기(100)에서 유량 및 암모니아성 질소의 농도를 고려하여 연산된 상기의 [수학식 1]에 따른 전처리염소 투입량만큼 염소를 투입한다.(S260)The set pretreatment chlorine target value is compared with the pretreatment residual chlorine measured by the first residual chlorine measuring device (S50), and when the result of the comparison is less than the pretreatment chlorine target value, the control signal sent from the PLC controller 100 The pretreatment chlorine injector 160 is operated by (S1) to inject chlorine as much as the pretreatment chlorine input according to the above [Equation 1] calculated in consideration of the flow rate and the concentration of ammonia nitrogen in the PLC controller 100. (S260)

m1 = W × [(Nc ㅧ 8) + f +Vf + (Vf - Cf)] … [수학식 1]m 1 = W × [(Nc ㅧ 8) + f + V f + (V f -C f )]. [Equation 1]

여기서, m1:전처리염소 투입량(kg/h), W:유량(㎥/h), Nc:암모니아성 질소의 농도(mg/ℓ), f: 전염소요구량(mg/ℓ), Vf:전처리염소목표치(mg/ℓ), Cf:전처리잔류염소량(mg/ℓ)Where m 1 : pretreatment of chlorine (kg / h), W: flow rate (m 3 / h), Nc: concentration of ammonia nitrogen (mg / l), f: prechlorine requirement (mg / l), V f : Pretreatment Chlorine Target Value (mg / ℓ), C f : Pretreatment Chlorine Content (mg / ℓ)

구체적으로, 전처리염소 투입량은 유량계(11)에 의해 측정된 유량(W)과, 암모니아성 질소 농도 측정계(12)에 의해 측정된 암모니아성 질소 농도(Nc)와, 상기 [반응식 1]에 의한 1분자의 아모니아성 질소 농도를 불활성화 하기 위한 파괴점염소투입을 화학적인 소비량 반응상수(7.6≒8)와, 전처리염소목표치(Vf)와 전처리잔류염소량(Cf)의 편차를 줄이기 위해 피드백 제어 된다.Specifically, the pretreatment chlorine input amount is the flow rate (W) measured by the flow meter 11, the ammonia nitrogen concentration (Nc) measured by the ammonia nitrogen concentration measurement system 12, and 1 according to the above [Scheme 1]. Breakpoint chlorine injection to inactivate the ammonia nitrogen concentration of the molecule is feedback-controlled to reduce the variation in the chemical consumption response constant (7.6 ≒ 8), the target chlorine target (Vf) and the pretreatment residual chlorine (Cf). .

하지만, 유기물과 조류유입을 감안한 전염소요구량(f)은 전염투입지점인 착수정(20)에서 전처리잔류염소 측정지점인 혼화지(30) 까지 20±10분 체류시간이 소요된 관계로 전처리염소목표치(Vf)와 전처리잔류염소량(Cf)의 반응편차가 발생하나, 이을 줄이기 위해 전염소요구량(f)을 설정치를 추가하여 혼화지(30)에서 전처리잔류염소량이 복합제어 되어, 응집지(40)의 잔류염소량을 0.30±010mg/ℓ, 침전 지(50)의 잔류염소량을 0.20±0.10mg/ℓ로 유지하기 위한 염소량이다.However, the pre-chlorine requirement (f) considering the inflow of organic matter and algae is 20 ± 10 min residence time from the watering well (20), which is the contagion point, to the mixed site (30), which is the pre-treatment chlorine measurement point. Reaction deviation of (V f ) and pretreatment residual chlorine (C f ) occurs, but pretreatment residual chlorine is mixed in the mixed paper (30) by adding the prechlorine requirement (f) to reduce this, 40) is the amount of chlorine to maintain the amount of residual chlorine 0.30 ± 010 mg / l, and the amount of residual chlorine in the sedimentation basin 50 to 0.20 ± 0.10 mg / l.

반대로, 전처리잔류염소량이 전처리염소목표치 보다 이상일 경우, 제어신호(S1)에 의해 상기 전처리염소 투입기(160)를 정지시켜 전염소 투입을 차단한다.(S270)On the contrary, when the amount of pre-treated residual chlorine is higher than the target value of pre-chlorine, the pre-chlorine injector 160 is stopped by the control signal S1 to block the pre-chlorine input.

다음으로, 중간염소 처리부(700)에 있어서, PLC제어기(100)에 의해 중간염소목표치를 미리 설정하고(S280), 중간염소 처리부(700)의 여과지 집수정에 설치된 제 2잔류염소 측정기(150)를 이용하여 여과지(50)에 포함된 중간잔류염소량을 측정한다(S290).Next, in the intermediate chlorine processing unit 700, the intermediate chlorine target value is set in advance by the PLC controller 100 (S280), and the second residual chlorine measuring unit 150 installed in the filter paper collection well of the intermediate chlorine processing unit 700. Measure the amount of intermediate residual chlorine contained in the filter paper 50 using (S290).

이 설정된 중간염소목표치와 제 2잔류염소 측정기에 의해 측정된 중간잔류염소량을 비교하고(S300), 그 비교 결과 중간잔류염소량이 중간염소목표치 보다 이하일 경우, PLC 제어기(100)로부터 송출되는 제어신호(S12)에 의해 중간염소 투입기(170)를 동작시켜 PLC 제어기(100)에서 유량을 고려하여 연산된 하기의 [수학식 3]에 따른 중간염소 투입량만큼 염소를 투입한다.(S310)The set intermediate chlorine target value and the intermediate residual chlorine measured by the second residual chlorine measuring device are compared (S300), and as a result of the comparison, if the residual residual chlorine is lower than the intermediate chlorine target value, the control signal transmitted from the PLC controller 100 ( By operating the intermediate chlorine injector 170 by S12) chlorine is added as much as the amount of intermediate chlorine according to the following [Equation 3] calculated in consideration of the flow rate in the PLC controller 100. (S310)

m2 = W × [f +Vm+ (Vm - Cm)]m 2 = W × [f + V m + (V m -C m )]

여기서, m2:중간염소 투입량(kg/h), W:유량(㎥/h), f:중염소 요구량(mg/L), Vm:중간염소목표치(mg/L), Cm:중간잔류염소량(mg/L)Where m 2 : middle chlorine input (kg / h), W: flow rate (m 3 / h), f: medium chlorine demand (mg / L), V m : middle chlorine target (mg / L), C m : middle Residual Chlorine (mg / L)

구체적으로, 중간염소 투입량(m2)은 유량(W)과, 유기물 및 조류유입 등을 감안한 중염소요구량(f)과, 중간염소목표치(Vm)과 중간잔류염소량(Cm)의 차이값에 의 해 결정된다. 목표치(Vm)는 여과지(60) 집수정의 잔류염소량이다. 본 발명에서는 상기 목표치는 0.40±10mg/L로 설정하였다.Specifically, the intermediate chlorine input amount (m 2 ) is determined by the difference between the flow rate (W), the heavy chlorine requirement (f) taking into account organic matter and algae inflow, and the intermediate chlorine target value (Vm) and the intermediate residual chlorine amount (Cm). Is determined. The target value Vm is the amount of residual chlorine in the filter paper 60 collecting well. In the present invention, the target value is set to 0.40 ± 10 mg / L.

반대로, 중간잔류염소량이 중간염소목표치 보다 이상일 경우, 제어신호(S2)에 의해 상기 중간염소 투입기(170)를 정지시켜 염소 투입을 차단한다.(S320)On the contrary, when the amount of intermediate residual chlorine is higher than the target value of intermediate chlorine, the intermediate chlorine injector 170 is stopped by the control signal S2 to block the chlorine input.

마지막으로, 후처리염소 처리부(800)에 있어서, PLC제어기(100)에 의해 후처리염소목표치를 미리 설정하고(S330), 후처염소 처리부(800)의 후단에 구비된 송수관에 설치된 제 3잔류염소 측정기(140)를 이용하여 정수지(70)에 포함된 후처리염소 잔류염소량을 측정한다(S340).Finally, in the post-processing chlorine processing unit 800, the target chlorine target value is set in advance by the PLC controller 100 (S330), and the third residual chlorine installed in the water pipe provided at the rear end of the post-chlorine processing unit 800. Using the measuring unit 140 measures the amount of residual chlorine after-treatment included in the purified water (70) (S340).

이 설정된 후처리염소목표치와 제 3잔류염소 측정기에 의해 측정된 후처리잔류염소량을 비교하고(S350), 그 비교 결과 후처리잔류염소량이 후처리염소목표치 보다 이하일 경우, PLC 제어기(100)로부터 송출되는 제어신호(S13)에 의해 후처리염소 투입기(180)를 동작시켜 PLC 제어기(100)에서 유량을 고려하여 상기 [수학식 4]에 따른 후염소 투입량만큼 염소를 투입한다.(S360)The set post-treatment chlorine target value is compared with the post-treatment residual chlorine measured by the third residual chlorine measuring unit (S350), and when the post-treatment residual chlorine is less than the post-treatment chlorine target value as a result of the comparison, it is sent out from the PLC controller 100. By operating the post-processing chlorine injector 180 in response to the control signal (S13), the chlorine is added as much as the amount of post-chlorine according to [Equation 4] in consideration of the flow rate in the PLC controller 100. (S360)

m3 = W × [(Vb - Cm) + (Vb - Cb)]m 3 = W × [(V b -C m ) + (V b -C b )]

여기서, m3:후염소 투입량(kg/h), W:유량(㎥/h), Vb:후처리염소목표치(mg/ℓ), Where m 3 : post-chlorine input (kg / h), W: flow rate (m 3 / h), V b : post-treatment chlorine target (mg / l),

Cm:중간잔류염소, Cb:후처리염소 잔류염소량(mg/ℓ)C m : intermediate residual chlorine, C b : post-treatment chlorine residual chlorine (mg / ℓ)

상기 후처리염소목표치(Vb)는 송수관(90)의 목표 염소량이다. 본 발명에서는 상기 후처리염소목표치(Vb)를 0.90±0.10mg/ℓ로 설정하였다. The post-treatment chlorine target value V b is a target chlorine content of the water pipe 90. In the present invention, the post-treatment chlorine target value (V b ) was set to 0.90 ± 0.10 mg / l.

반대로, 후처리잔류염소량이 후처리염소목표치 보다 이상일 경우, 제어신호(S3)에 의해 상기 후처리염소 투입기(180)를 정지시켜 염소 투입을 차단한다.(S370)On the contrary, when the amount of post-treatment residual chlorine is higher than the target value of post-treatment chlorine, the post-treatment chlorine injector 180 is stopped by the control signal S3 to block the chlorine input (S370).

따라서 이러한 과정을 통해, 전처리염소 처리부로 유입되는 원수의 수질변화에 능동적으로 실시간 자동제어가 가능하게 되어, 이하 도 5의 그래프에서 나타낸 바와 같이 염소량의 실질적인 낭비를 줄이는 것이 가능하다.Therefore, through this process, it becomes possible to automatically control in real time to change the water quality of the raw water flowing into the pre-chlorine treatment unit, it is possible to reduce the substantial waste of chlorine as shown in the graph of FIG.

도 5는 본 발명에 따른 복합제어방식의 염소자동화시스템에 의해 측정된 잔류염소를 비교한 그래프이다.5 is a graph comparing residual chlorine measured by the chlorine automation system of the combined control method according to the present invention.

도 5에 도시된 바와 같이, 종래의 2005년에는 염소투입 조정횟수 예를 들면 최대 34회에서 최소 3회 등의 조정회수 편차가 불규칙하여 주입하는 염소량의 조절이 쉽지 않아 염소를 낭비하였지만, 본 발명에 따른 복합제어방식의 염소자동화시스템을 이용하여 소독 공정 설비로 염소를 투입한 2006년의 경우, 염소투입이 목표값에 의해 투입됨으로 조정횟수가 거의 일정하여 인적 및 물적 손실을 줄이는 것이 가능하다.As shown in FIG. 5, in the conventional 2005, the adjustment of the chlorine input frequency, for example, a maximum of 34 to at least 3 times, is not easy to adjust the amount of chlorine to be injected irregularly wasted chlorine waste, but the present invention In 2006, when chlorine was injected into the disinfection process facility using the chlorine automation system of the complex control method according to the present invention, it is possible to reduce the human and material loss because the chlorine input is input by the target value.

본 발명에 따른 염소자동화시스템은 소독공정뿐만 아니라, 염소를 투입하는 다양한 공정에서도 적용 가능하다.The chlorine automation system according to the present invention can be applied not only to the disinfection process but also to various processes of adding chlorine.

도 1은 본 발명의 실시 예1에 따른 복합제어방식의 염소자동화시스템의 개략적인 구성도이다.1 is a schematic configuration diagram of a chlorine automation system of a hybrid control method according to Embodiment 1 of the present invention.

도 2는 본 발명의 실시 예1에 따른 전처리염소 및 후처리염소 공정에 염소를 투입하는 과정을 나타내는 플로우 차트이다.2 is a flowchart illustrating a process of adding chlorine to a pre-treated chlorine and a post-treated chlorine process according to Example 1 of the present invention.

도 3은 본 발명의 실시 예2에 따른 중간염소 처리부가 부가된 복합제어방식의 염소자동화시스템의 구성도이다.3 is a block diagram of a chlorine automation system of the combined control method with an intermediate chlorine treatment unit according to a second embodiment of the present invention.

도 4는 본 발명의 실시 예2에 따른 전처리염소, 중간염소 및 후처리염소 공정에 염소를 투입하는 과정을 나타내는 플로우 차트이다.4 is a flowchart illustrating a process of adding chlorine to a pre-treated chlorine, an intermediate chlorine and a post-treated chlorine process according to Example 2 of the present invention.

도 5는 본 발명의 실시 예2에 따른 복합제어방식의 염소자동화시스템에 의해 측정된 잔류염소를 비교한 그래프이다.5 is a graph comparing residual chlorine measured by the chlorine automation system of the hybrid control method according to the second embodiment of the present invention.

*도면 부호에 대한 설명* Description of the drawing symbols

1, 19. 취수장 2, 20. 착수정1, 19. Water intake 2, 20. Initiation boat

3, 30. 혼화지 40. 응집지3, 30. Mixed paper 40. Coagulated paper

50. 침전지 6, 60. 여과지50. Precipitate 6, 60. Filter paper

7, 70. 정수지 9, 90. 송수관7, 70. Water purifier 9, 90. Water pipe

10, 100. PLC제어기 11, 110. 유량계10, 100.PLC controller 11, 110.Flow meter

12, 120. 암모니아성 질소 측정계 13, 130. 제 1잔류염소 측정기12, 120. Ammonia nitrogen measuring system 13, 130. First residual chlorine measuring system

14, 140. 제 3잔류염소 측정기 150. 제 2잔류염소 측정기14, 140. Third Residual Chlorine Meter 150. Second Residual Chlorine Meter

16, 160. 전염소 투입기 18, 180. 후염소 투입기16, 160. Prechlorinator 18, 180. Postchlorine Injector

170. 중염소 투입기 400, 600. 전염소 처리부170. Heavy Chlorine Injector 400, 600. All Chlorine Treatment Unit

800. 후염소 처리부 700. 중염소 처리부800. Post chlorine treatment unit 700. Heavy chlorine treatment unit

Claims (9)

복합제어방식의 염소자동화시스템에 있어서,In the chlorine automation system of the combined control method, 취수탑을 포함하는 취수장과, 상기 취수장과 배관 연결되며 전염소 투입기가 구비된 착수정과, 상기 착수정의 후단에 형성되며 제 1잔류염소 측정기가 설치된 혼화지로 이루어지되, 상기 취수장과 상기 착수정 사이에 연결되는 배관상에는 유량을 측정하는 유량계 및 상기 암모니아성 질소의 농도를 측정하는 암모니아성 질소 측정기가 설치되는 전염소 처리부와,A water intake including a water intake tower, and a water intake pipe connected to the water intake pipe and equipped with a pre-chlorine injector, and a mixed paper formed at a rear end of the water well and installed with a first residual chlorine meter, connected between the water intake station and the water well. An all-chlorine processing unit having a flow meter for measuring the flow rate and an ammonia nitrogen measuring device for measuring the concentration of the ammonia nitrogen on the pipe; 상기 전염소 처리부에 연결되는 여과지와, 상기 여과지와 배관 연결되며 그 후단에 송수관을 구비하는 정수지로 이루어지고, 상기 여과지와 상기 정수지 사이의 배관에 후염소 투입기가 구비되며, 상기 송수관에는 제 3잔류염소 측정기가 설치되는 후염소 처리부와,The filter paper is connected to the pre-chlorine treatment unit, and the filter paper is connected to the filter paper and the water pipe is provided with a water pipe at the rear end, a post-chlorine injector is provided in the pipe between the filter paper and the water purification paper, the water pipe is a third residue After chlorine treatment unit is installed chlorine measuring unit, 상기 제 1잔류염소 측정기에 의해 측정된 전염소 잔류염소량과 미리 설정된 전염소의 목표 잔류염소량을 비교 연산하여 상기 전염소 처리부에 투입되는 전염소 투입량을 제어하며,The total amount of chlorine remaining chlorine measured by the first residual chlorine measuring unit and the target residual chlorine amount of the predetermined total chlorine are compared and controlled to control the amount of all chlorine introduced into the total chlorine treatment unit. 상기 제 3잔류염소 측정기에 의해 측정된 후염소 잔류염소량과 미리 설정된 후염소의 목표 잔류염소량을 비교 연산하여, 상기 후염소 처리부에 투입되는 후염소 투입량을 제어하는 PLC제어기를 포함하는 것을 특징으로 하는 복합제어방식의 염소자동화시스템.And a PLC controller for controlling the amount of post-chlorine introduced into the post-chlorine treatment unit by comparing and calculating the amount of post-chlorine residual chlorine measured by the third residual chlorine detector and the target residual chlorine of the pre-set post-chlorine. Chlorine automation system with combined control method. 제1항에 있어서,The method of claim 1, 상기 전염소 투입량이 하기 [수학식 5]에 의해 계산됨을 특징으로 하는 복합제어방식의 염소자동화시스템.The chlorine automation system of the combined control method characterized in that the total chlorine input amount is calculated by the following [Equation 5]. m1 = W × [(Nc × 8) + f +Vf + (Vf - Cf)]m 1 = W × [(Nc × 8) + f + V f + (V f -C f )] 여기서, m1:전처리염소 투입량(kg/h), W:유량(㎥/h), Nc:암모니아성 질소의 농도(mg/L), f: 전염소요구량(mg/L), Vf:전처리염소목표치(mg/L), Cf:전처리잔류염소량(mg/L)Where m 1 : pretreatment of chlorine (kg / h), W: flow rate (m 3 / h), Nc: concentration of ammonia nitrogen (mg / L), f: prechlorine requirement (mg / L), V f : Pretreatment Chlorine Target (mg / L), C f : Pretreatment Chlorine (mg / L) 제2항에 있어서,The method of claim 2, 상기 후염소 투입량이 하기 [수학식6]에 의해 계산됨을 특징으로 하는 복합제어방식의 염소자동화시스템.The post-chlorine input amount is calculated by the following [Equation 6] chlorine automation system of the combined control method. m3 = W×[f +Vb +(Vb - Cb)]m 3 = W × [f + V b + (V b -C b )] 여기서, m3:후처리염소 투입량(kg/h), W:유량(㎥/h), f:후염소 요구량(mg/ℓ), Vb:후처리염소목표치(mg/ℓ), Cb:후처리잔류염소량(mg/ℓ)Where m 3 : post-treatment chlorine input (kg / h), W: flow rate (m 3 / h), f: post-chlorine demand (mg / l), V b : target post-treatment chlorine (mg / l), C b Post-treatment residual chlorine (mg / ℓ) 제 1항에 있어서,The method of claim 1, 상기 전염소 처리부(600)와 배관 연결되는 응집지(40)와, 상기 응집지(40)의 후단에 형성된 침전지(50)와, 상기 침전지(50)와 배관 연결되는 상기 여과지(60)로 이루어지되, 상기 침전지(50)와 상기 여과지(60) 사이에 중염소 투입기(170)가 구비되며, 상기 여과지(60)에는 제 2잔류염소 측정기가 설치되는 중염소 처리부를 더 포함하되,It consists of a flocculation paper 40 connected to the pre-chlorine treatment unit 600, a sedimentation basin 50 formed at the rear end of the agglomeration paper 40, and the filter paper 60 connected to the sedimentation basin 50. However, a heavy chlorine injector 170 is provided between the sedimentation basin 50 and the filter paper 60, and the filter paper 60 further includes a heavy chlorine treatment unit in which a second residual chlorine measuring unit is installed. 상기 PLC제어기는 상기 제 2잔류염소 측정기에 의해 측정된 중염소 잔류염소량과 미리 설정된 중염소의 목표 잔류염소량을 비교 연산하여, 상기 중염소 처리부에 투입되는 중염소 투입량을 제어하는 것을 특징으로 하는 복합제어방식의 염소자동화시스템.The PLC controller compares the amount of heavy chlorine residual chlorine measured by the second residual chlorine measuring unit with the target residual chlorine of a predetermined heavy chlorine, and controls the amount of heavy chlorine introduced into the heavy chlorine processing unit Controlled Chlorine Automation System. 제4항에 있어서,The method of claim 4, wherein 상기 중염소 투입량이 하기 [수학식 7]에 의해 계산됨을 특징으로 하는 복합제어방식의 염소자동화시스템.The chlorine automation system of the combined control method characterized in that the heavy chlorine input is calculated by the following Equation 7. m2 = W ×［ f +Vm+ (Vm - Cm)]m 2 = W × [f + V m + (V m -C m )] 여기서, m2:중염소 투입량(kg/h), W:유량(㎥/h), f:중염소 요구량(mg/L), Vm:중간염소목표치(mg/L), Cm:중간잔류염소량(mg/L)Where m 2 : medium chlorine input (kg / h), W: flow rate (m 3 / h), f: medium chlorine demand (mg / L), V m : medium chlorine target (mg / L), C m : medium Residual Chlorine (mg / L) 제5항에 있어서,The method of claim 5, 상기 후염소 투입량이 하기 [수학식 8]에 의해 계산됨을 특징으로 하는 복합제어방식의 염소자동화시스템.The post-chlorine input amount is calculated by the following [Equation 8] chlorine automation system of the combined control method. m3 = W × [(Vb - Cm) + (Vb - Cb)]m 3 = W × [(V b -C m ) + (V b -C b )] 여기서, m3:후염소 투입량(kg/h), W:유량(㎥/h), Vb:후처리염소목표치(mg/L), Cm:중간잔류염소(mg/L), Cb:후처리염소 잔류염소량(mg/L)Where m 3 : post chlorine input (kg / h), W: flow rate (㎥ / h), V b : post-treatment chlorine target value (mg / L), C m : intermediate residual chlorine (mg / L), C b Post-processing chlorine residual chlorine (mg / L) 제 1항에 있어서, The method of claim 1, 상기 전염소 잔류염소량과 상기 전염소의 목표 잔류염소량을 비교한 결과, 상기 전염소 잔류염소량이 상기 전염소의 목표 잔류염소량보다 이하일 경우, 상기 PLC 제어기로부터 송출되는 제어신호에 의해 상기 전염소 투입기를 동작시켜 상기 전염소 투입량에 따라 염소를 투입하고, 상기 전염소 잔류염소량이 상기 전염소의 목표 잔류염소량보다 이상일 경우, 상기 제어신호에 의해 상기 전염소 투입기를 정지시켜 염소 투입을 차단하는 것을 특징으로 하는 복합제어방식의 염소자동화시스템.As a result of comparing the total chlorine residual chlorine with the target residual chlorine of the total chlorine, when the total chlorine residual chlorine is less than the target residual chlorine of the total chlorine, the all chlorine injector is controlled by a control signal sent from the PLC controller. Operating chlorine according to the total chlorine input amount, and when the total chlorine residual chlorine amount is higher than the target residual chlorine amount, the control signal stops the chlorine input by stopping the all chlorine injector according to the control signal. Chlorine automation system with complex control system. 제 1항에 있어서,The method of claim 1, 상기 후염소 잔류염소량과 상기 후염소의 목표 잔류염소량을 비교한 결과, 상기 후염소 잔류염소량이 상기 후염소의 목표 잔류염소량보다 이하일 경우, 상기 PLC 제어기로부터 송출되는 제어신호에 의해 상기 후염소 투입기를 동작시켜 상기 후염소 투입량에 따라 염소를 투입하고, 상기 후염소 잔류 염소량이 상기 후염소의 목표 잔류염소량보다 이상일 경우, 상기 제어신호에 의해 상기 후염소 투입기를 정지시켜 염소 투입을 차단하는 것을 특징으로 하는 복합제어방식의 염소자동화시스템.As a result of comparing the amount of residual chlorine and the target residual chlorine of the after chlorine, when the amount of residual chlorine is less than the target residual chlorine of the after chlorine, the after chlorine injector is controlled by a control signal sent from the PLC controller. Chlorine is introduced according to the amount of post-chlorine input, and when the amount of residual chlorine is greater than the target residual chlorine of the post-chlorine, the post-chlorine injector is stopped by the control signal to block the chlorine input. Chlorine automation system with complex control system. 제 4항에 있어서,The method of claim 4, wherein 상기 중염소 잔류염소량과 상기 중염소의 목표 잔류염소량을 비교한 결과, 상기 중염소 잔류염소량이 상기 중염소의 목표 잔류염소량보다 이하일 경우, 상기 PLC 제어기로부터 송출되는 제어신호에 의해 상기 중염소 투입기를 동작시켜 상기 중염소 투입량에 따라 상기 염소를 투입하고, 상기 중염소 잔류염소량이 상기 중염소의 목표 잔류염소량보다 이상일 경우, 상기 제어신호에 의해 상기 중염소 투입기를 정지시켜 염소 투입을 차단하는 것을 특징으로 하는 복합제어방식의 염소자동화시스템.As a result of comparing the amount of residual chlorine chlorine with a target residual chlorine of the heavy chlorine, when the amount of residual chlorine is less than the target residual chlorine of the heavy chlorine, the heavy chlorine injector is controlled by a control signal sent from the PLC controller. Operating the chlorine in accordance with the heavy chlorine input amount, and when the chlorine residual chlorine amount is higher than the target residual chlorine amount of the heavy chlorine, the control signal stops the chlorine injector by stopping the heavy chlorine injector. Chlorine automation system with complex control system.
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KR101400950B1 (en) * 2013-12-23 2014-05-29 서울특별시 Control method of chlorine input in water treatment process
CN104536371A (en) * 2014-12-30 2015-04-22 洛阳双瑞万基钛业有限公司 Unattended automatic production control method for recycling of electrolytic chlorine
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Publication number Priority date Publication date Assignee Title
WO2012060518A1 (en) * 2010-11-01 2012-05-10 Lee Tae Il Plc system for automatically controlling pid for maintaining target water quality value by depositing water treatment chemical
KR101400950B1 (en) * 2013-12-23 2014-05-29 서울특별시 Control method of chlorine input in water treatment process
CN104536371A (en) * 2014-12-30 2015-04-22 洛阳双瑞万基钛业有限公司 Unattended automatic production control method for recycling of electrolytic chlorine
CN104536371B (en) * 2014-12-30 2017-02-22 洛阳双瑞万基钛业有限公司 Unattended automatic production control method for recycling of electrolytic chlorine
CN114911193A (en) * 2022-07-19 2022-08-16 武汉华信数据***有限公司 Water works chlorination control method and system
CN115196730A (en) * 2022-07-19 2022-10-18 南通派菲克水务技术有限公司 Intelligent sodium hypochlorite adding system for water plant
CN114911193B (en) * 2022-07-19 2022-11-15 武汉华信数据***有限公司 Water works chlorination control method and system

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