KR20020016229A - a scale removal system of heat exchanger - Google Patents

a scale removal system of heat exchanger Download PDF

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KR20020016229A
KR20020016229A KR1020000049425A KR20000049425A KR20020016229A KR 20020016229 A KR20020016229 A KR 20020016229A KR 1020000049425 A KR1020000049425 A KR 1020000049425A KR 20000049425 A KR20000049425 A KR 20000049425A KR 20020016229 A KR20020016229 A KR 20020016229A
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South Korea
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pretreatment
heat exchanger
cleaning liquid
cleaning solution
post
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KR1020000049425A
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Korean (ko)
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KR100472565B1 (en
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이종렬
이현준
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이구택
포항종합제철 주식회사
신현준
재단법인 포항산업과학연구원
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28GCLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G9/00Cleaning by flushing or washing, e.g. with chemical solvents
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28GCLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G15/00Details
    • F28G15/04Feeding and driving arrangements, e.g. power operation

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Abstract

PURPOSE: A scale removing system of heat exchanger is provided to swiftly and automatically remove scale sticking on a plate type heat exchanger. CONSTITUTION: A scale removing system comprises a pretreatment cleaning solution tank(T1); an aftertreatment cleaning solution tank(T2); a circulating channel(R); a cleaning solution circulating device; a cleaning solution recovery tank(T3); and multiple valves(V1,V2,V3,V4,V5,V6,V7,V8). The pretreatment cleaning solution tank is filled with pretreatment cleaning solution, mixture of pretreatment chemicals and water, and connected with an inlet line(C1) of fluid. The aftertreatment cleaning solution tank is filled with aftertreatment cleaning solution, mixture of aftertreatment chemicals and water, and connected with the inlet line of the fluid. The circulating channel connects an outlet line(C2) of the fluid with the pretreatment and aftertreatment cleaning solution tanks. The cleaning solution circulating device comprises a first pump and a second pump(M2) circulating the pretreatment and aftertreatment cleaning solution in a heat exchanger(E), respectively. The cleaning solution recovery tank temporarily stores the pretreatment and aftertreatment cleaning solution having circulated in the heat exchanger. The valves selectively open and close the inlet and outlet lines of the fluid, inlets of the pretreatment and aftertreatment cleaning solution tanks and an inlet and an outlet of the cleaning solution recovery tank.

Description

열교환기의 스케일 제거 시스템{a scale removal system of heat exchanger}Scale removal system of heat exchanger

본 발명은 열교환기의 스케일 제거 시스템에 관한 것으로서, 특히 각종 산업현장에서 발생하는 온수의 냉각에 사용되는 판형 열교환기(plate type heat exchanger)의 부착 스케일을 제거하는데 적합한 열교환기의 스케일 제거 시스템에 관한 것이다.The present invention relates to a descaling system of a heat exchanger, and more particularly, to a descaling system of a heat exchanger suitable for removing an adhered scale of a plate type heat exchanger used for cooling hot water generated in various industrial sites. will be.

일반적으로 판형 열교환기(E)는 도 1에 도시한 바와 같이, 다수의 열교환판(P)들을 미세한 간격(약 3㎜ 이하)으로 배열하여 온수유로(Sh)와 냉각수유로(Sc)를 교번적으로 배치하고, 온수(Wh)와 냉각수(Wc)를 지그재그 형태로 서로 역방향으로 순환시키면서 온도가 다른 두 유체를 열교환시키는 것으로서, 열교환 효율이 우수하고 대량의 온수를 신속히 냉각시킬 수 있는 등의 장점에 따라 특히 각종 산업현장에서의 냉각수 열교환에 널리 사용되고 있다.In general, the plate heat exchanger (E) alternates between the hot water flow path (Sh) and the cooling water flow path (Sc) by arranging a plurality of heat exchange plates (P) at minute intervals (about 3 mm or less), as shown in FIG. And heat exchange the two fluids having different temperatures while circulating the hot water (Wh) and the cooling water (Wc) in a zigzag direction in the opposite direction, so that the heat exchange efficiency is excellent and a large amount of hot water can be cooled quickly. Therefore, it is widely used for cooling water heat exchange, especially in various industrial sites.

예컨대, 제철소에 있어서도 일련의 제철공정중 곳곳에 냉각수가 사용되고 있는데, 이와 같은 냉각수는 그 냉각대상물의 냉각과 동시에 뜨겁게 가열되는 바, 냉각수가 지속적으로 냉각작용을 수행하기 위해서는 대상물의 냉각 후 다시 적절한 온도로 냉각되어야 한다. 이를 위해 제철소 등에서는 냉각수의 재냉각을 위한 냉각설비를 함께 구비하고 있다.For example, in a steel mill, cooling water is used in various places in a steelmaking process. Since such cooling water is heated hot at the same time as cooling of the cooling object, in order for the cooling water to continuously perform cooling, the appropriate temperature again after cooling the object. Should be cooled. To this end, steel mills and the like are equipped with a cooling facility for recooling the cooling water.

한편, 여러 제조공정에서 사용되는 각각의 냉각수(이하 "온수"로 칭함)를 전용의 냉각탑에 의해 독립적으로 냉각시킬 경우, 과다한 냉각설비와 많은 설비면적이 소요될 뿐만 아니라 온수를 냉각하기 위한 냉각수의 관리에도 많은 인력과 기술 및 약품 등이 소요되는 불합리한 문제가 수반된다. 이에 따라 제철소 등의 산업현장에서는 하나 또는 몇 개의 대형 판형 열교환기를 적정장소에 설치하여 여러 제조공정에서 발생되는 온수를 하나의 냉각탑에 의해 동시에 재냉각시킴으로써 독립냉각에 따른 문제를 해소하는 추세에 있다.On the other hand, when each cooling water (hereinafter referred to as "hot water") used in various manufacturing processes is independently cooled by a dedicated cooling tower, it requires not only excessive cooling equipment and a large amount of equipment area, but also management of cooling water for cooling hot water. In addition, there are unreasonable problems that require a lot of manpower, technology and medicine. Accordingly, in industrial sites such as steel mills, one or a few large plate heat exchangers are installed in appropriate places, thereby re-cooling hot water generated in various manufacturing processes by one cooling tower at the same time to solve the problem of independent cooling.

위와 같은 냉각설비에 있어 온수의 경우에는 대부분 폐회로로 구성되어 스케일의 발생이 거의 없지만, 냉각탑을 경유하는 냉각수에는 여러 가지 이물질이 포함되어 있기 때문에 일정기간동안 사용하게 되면 열교환기(E)의 냉각수유로(Sc)쪽 열교환판(P)에 스케일이 부착되어 열교환기(E)의 성능을 떨어뜨리게 되므로 스케일이 부착될 경우 이를 확실히 제거해주어야 한다.In the above cooling system, most of the hot water is composed of closed circuits, and almost no scale is generated. However, since the cooling water passing through the cooling tower contains various foreign matters, the cooling water flow path of the heat exchanger (E) is used for a certain period of time. The scale is attached to the (Sc) side heat exchanger plate (P), which degrades the performance of the heat exchanger (E).

그런데, 판형 열교환기(E)는 열교환판(P)들간의 간격이 매우 작기 때문에 스케일이 부착될 경우 그 제거에 큰 어려움이 있었다. 즉, 종래에는 열교환판(P)에 스케일이 부착된 경우, 열교환기(E)를 분해하여 각 열교환판(P)을 고압수로 세척하거나 세정약품으로 스케일을 제거한 후 열교환기(E)를 재조립하였는 바, 용량이 시간당 100톤이 넘는 대형 열교환기(E)의 경우 스케일의 제거에 많은 인력과 장비가 필요할 뿐 아니라 제거시간도 수일이 소요되고 그에 따라 조업시간이 줄어들어 생산성 저하로 이어지는 심각한 문제가 초래되었던 것이다.However, the plate heat exchanger (E) has a great difficulty in removing when the scale is attached because the gap between the heat exchange plate (P) is very small. That is, in the related art, when the scale is attached to the heat exchanger plate (P), the heat exchanger (E) is disassembled and each heat exchanger plate (P) is washed with high pressure water or the scale is removed with a cleaning chemical, and then the heat exchanger (E) is restarted. As a result, the large heat exchanger (E) with a capacity of more than 100 tons per hour not only requires a lot of manpower and equipment to remove the scale but also takes several days to remove the operation time, which leads to a serious problem that leads to a decrease in productivity. Was caused.

또한, 스케일 제거작업에 넓은 면적이 필요하고, 사용된 세제와 제거된 스케일에 의한 주변환경 오염도 심한 문제가 있었다.In addition, a large area is required for the descaling operation, and there is a serious problem with the environmental pollution caused by the used detergent and the removed scale.

본 발명은 상술한 종래의 문제점을 감안하여 창출된 것으로서, 판형 열교환기에 부착된 스케일을 자동으로 신속하게 제거할 수 있는 판형 열교환기의 스케일 제거 시스템을 제공함에 그 목적이 있다.The present invention has been made in view of the above-described conventional problems, and an object thereof is to provide a descaling system of a plate heat exchanger capable of automatically and quickly removing a scale attached to the plate heat exchanger.

본 발명의 다른 목적은, 판형 열교환기를 분해하지 않고 그 내부에 부착된 스케일을 확실하게 제거할 수 있는 판형 열교환기의 스케일 제거 시스템을 제공하는 것이다.Another object of the present invention is to provide a descaling system of a plate heat exchanger capable of reliably removing a scale attached therein without disassembling the plate heat exchanger.

본 발명의 또 다른 목적은, 스케일 제거로 인한 환경오염을 확실하게 방지할수 있는 판형 열교환기의 스케일 제거 시스템을 제공하는 것이다.Still another object of the present invention is to provide a descaling system of a plate heat exchanger which can reliably prevent environmental pollution due to descaling.

도 1은 판형 열교환기의 유체흐름을 나타낸 개략도,1 is a schematic view showing the fluid flow of the plate heat exchanger,

도 2는 본 발명에 의한 판형 열교환기의 스케일 제거 시스템을 나타낸 개략도,Figure 2 is a schematic diagram showing a descaling system of the plate heat exchanger according to the present invention,

도 3은 본 발명의 다른 실시예를 나타낸 개략도이다.3 is a schematic diagram showing another embodiment of the present invention.

〈도면의 주요 부분에 대한 부호의 설명〉<Explanation of symbols for main parts of drawing>

E: 판형 열교환기 P: (판형 열교환기의) 열교환판E: plate heat exchanger P: heat exchange plate (of plate heat exchanger)

C1, C2: 냉각수 유입 및 유출라인 T1: 전처리 세정액 탱크C1, C2: coolant inlet and outlet line T1: pretreatment rinse tank

T2: 후처리 세정액 탱크 T3: 세정액 회수탱크T2: post-treatment cleaning liquid tank T3: cleaning liquid recovery tank

M, M1, M2: 펌프 V1~V8: 밸브M, M1, M2: Pumps V1 to V8: Valves

이와 같은 목적들을 달성하기 위해 본 발명에 의한 판형 열교환기의 스케일 제거 시스템은, 전처리 약품과 물을 적정비율로 혼합한 전처리 세정액이 충진되며, 상기 유체의 유입라인과 연결되는 전처리 세정액 탱크; 후처리 약품과 물을 적정비율로 혼합한 후처리 세정액이 충진되며, 상기 유체의 유입라인과 연결되는 후처리 세정액 탱크; 열교환기에 대한 유체의 유출라인과 전처리 및 후처리 세정액 탱크들을 연결하는 순환유로; 전처리 세정액 및 후처리 세정액을 열교환기에 각각 순환시키는 세정액 순환수단; 열교환기를 순환하고난 전처리 및 후처리 세정액이 일시 저장되는 세정액 회수탱크; 유체의 유입 및 유출라인, 전처리 및 후처리 세정액 탱크의 유입로, 세정액 회수탱크의 유입 및 유출로를 선택적으로 개폐시키는 다수의 밸브;를 포함하여 구성되는 것을 특징으로 한다.In order to achieve the above objects, the descaling system of a plate heat exchanger according to the present invention includes a pretreatment cleaning liquid tank filled with a pretreatment cleaning liquid mixed with a pretreatment chemical and water at an appropriate ratio, and connected to an inflow line of the fluid; A post-treatment cleaning liquid tank filled with a post-treatment cleaning liquid in which a post-treatment chemical and water are mixed at an appropriate ratio, and connected to the inflow line of the fluid; A circulation passage connecting the outlet line of the fluid to the heat exchanger and the pretreatment and aftertreatment cleaning liquid tanks; Cleaning liquid circulation means for circulating the pretreatment cleaning liquid and the post treatment cleaning liquid to the heat exchanger, respectively; A cleaning solution recovery tank in which the pretreatment and post-treatment cleaning solutions are temporarily stored after circulating the heat exchanger; And a plurality of valves for selectively opening and closing the inflow and outflow lines of the fluid, the inflow path of the pretreatment and aftertreatment cleaning liquid tanks, and the inflow and outflow paths of the cleaning liquid recovery tanks.

이러한 본 발명의 한 바람직한 특징에 의하면, 세정액 순환수단이, 전처리 세정액과 후처리 세정액을 각각 순환시키는 제1, 2 펌프로 구성된다.According to one preferred feature of the present invention, the washing liquid circulation means comprises first and second pumps for circulating the pretreatment washing liquid and the post treatment washing liquid, respectively.

이에 따라 본 발명은, 판형 열교환기내에 부착된 스케일을 자동으로 신속하게 제거할 수 있음은 물론 열교환기를 일일이 분해하지 않고서도 그 내부에 부착된 스케일을 확실하게 제거할 수 있게 되므로 판형 열교환기의 스케일 제거 작업성과 설비의 가동율 및 생산성 향상 등에 큰 효과를 발휘하게 된다.Accordingly, the present invention can automatically and quickly remove the scale attached to the plate heat exchanger, as well as to reliably remove the scale attached to the plate heat exchanger without disassembling the heat exchanger. It will have a great effect on the removal workability and facility utilization rate and productivity improvement.

이와 같은 본 발명의 구체적 특징과 다른 이점들은 첨부된 도면을 참조한 이하의 바람직한 실시예의 설명으로 더욱 명확해질 것이다.Such specific features and other advantages of the present invention will become more apparent from the following description of the preferred embodiments with reference to the accompanying drawings.

도 2에서, 본 발명에 의한 판형 열교환기의 스케일 제거 시스템은 열교환기(E)에 대한 유체, 예컨대 냉각탑을 순회하는 냉각수의 유출라인(C2)과 유입라인(C1)이 순환유로(R)에 의해 서로 연결되어 선택적으로 기능하는 폐회로를 구성한다. 순환유로(R)의 유출부에는 전처리 세정액 탱크(T1)와 후처리 세정액 탱크(T2)가 병렬로 배치되어 각각 냉각수 유입라인(C1)과 연결된다. 전처리 세정액 탱크(T1)에는 스케일의 화학적 분해를 위한 전처리 약품과 물을 적정비율로 혼합한 전처리 세정액이 충진되고, 후처리 세정액 탱크(T2)에는 화학적으로 분해된 스케일을 열교환판(P)으로부터 떼어내는 후처리 약품과 물을 적정비율로 혼합한 후처리 세정액이 충진된다.In Figure 2, the descaling system of the plate heat exchanger according to the present invention, the outlet line (C2) and the inlet line (C1) of the fluid for the heat exchanger (E), for example, the cooling water circulating the cooling tower in the circulation passage (R) Connected to each other to form a closed circuit that selectively functions. At the outlet of the circulation passage R, the pretreatment washing liquid tank T1 and the aftertreatment washing liquid tank T2 are disposed in parallel to each other and are connected to the cooling water inflow line C1. The pretreatment cleaning liquid tank T1 is filled with a pretreatment cleaning liquid mixed with a pretreatment chemical and water for chemical decomposition of the scale in an appropriate ratio, and the aftertreatment cleaning liquid tank T2 is separated from the heat exchange plate P by chemically decomposed scale. After-treatment is filled with a post-treatment cleaning liquid mixed with the post-treatment chemicals and water in an appropriate ratio.

전처리 세정액 탱크(T1)와 냉각수 유입라인(C1) 사이에는 전처리 세정액을 열교환기(E)로 순환시키는 제1펌프(M1)가 설치되고, 후처리 세정액 탱크(T2)와 냉각수 유입라인(C1) 사이에는 후처리 세정액을 열교환기(E)로 순환시키는 제2펌프(M2)가 설치된다.Between the pretreatment rinse liquid tank T1 and the coolant inlet line C1, a first pump M1 for circulating the pretreatment rinse liquid to the heat exchanger E is provided, and the aftertreatment rinse liquid tank T2 and the coolant inlet line C1 are installed. In between, a second pump M2 for circulating the post-treatment cleaning liquid to the heat exchanger E is provided.

한편, 냉각수 유출라인(C2)과 전처리 및 후처리 세정액 탱크(T1)(T2)들 사이의 순환유로(R)에는 열교환기(E)를 순환하고난 세정액들이 외부로 배출되기 전에 일시적으로 저장되는 세정액 회수탱크(T3)가 설치되는데, 이 세정액 회수탱크(T3)는 순환유로(R)로부터 분기되어 연결된다.Meanwhile, the circulating flow path R between the cooling water outlet line C2 and the pretreatment and posttreatment cleaning liquid tanks T1 and T2 is temporarily stored before the cleaning liquids circulated through the heat exchanger E are discharged to the outside. The cleaning liquid recovery tank T3 is provided, and the cleaning liquid recovery tank T3 is branched from the circulation passage R to be connected.

그리고, 냉각수 유입 및 유출라인(C1)(C2)과, 전처리 및 후처리 세정액 탱크(T1)(T2)들의 유입로, 세정액 회수탱크(T3)의 유입 및 유출로 및 순환유로(R)의 유입부에는 각각의 유로를 선택적으로 개폐시키기 위한 다수의 솔레노이드밸브(V1~V7:이하 "밸브"로 약칭함)들이 구비된다. 이러한 밸브(V1~V7)와 펌프(M1)(M2)는 도시하지 않은 제어부에 전기적으로 연결되어 제어부의 신호에 따라 자동으로 작동된다.In addition, the inflow and outflow lines C1 and C2 of the cooling water and the inflow passages of the pretreatment and posttreatment cleaning liquid tanks T1 and T2, the inflow and outflow passages of the cleaning liquid recovery tank T3, and the inflow of the circulation flow path R are provided. The part is provided with a plurality of solenoid valves V1 to V7 (hereinafter abbreviated as "valve") for selectively opening and closing each flow path. These valves (V1 ~ V7) and the pump (M1) (M2) is electrically connected to the control unit (not shown) is automatically operated according to the signal of the control unit.

나머지 부호 H1과 H2는 온수라인의 유입 및 유출라인이다.The remaining codes H1 and H2 are inlet and outlet lines of the hot water line.

다음, 이와 같이 구성된 본 발명에 의한 스케일 제거 시스템의 작동에 대해 설명하기로 한다.Next, the operation of the descaling system according to the present invention configured as described above will be described.

먼저, 밸브(V5)와 밸브(V6)만 제외하고 나머지 밸브(V1~V4,V7)들을 모두 닫아 열교환기(E)와 전처리 세정액 탱크(T1)간에 폐회로를 구성한다. 이 상태에서, 제1펌프(M1)를 작동시켜 전처리 세정액 탱크(T1)내에 충진되어 있는 전처리 세정액을 열교환기(E)로 주입시킨다. 그러면, 전처리 세정액은 열교환기(E)의 해당 유로를 따라 흐른 뒤 순환유로(R)를 통해 전처리 세정액 탱크(T1)로 되돌아오며, 이러한 동작을 설정된 수시간 동안 반복한다.First, except for the valve V5 and the valve V6, all the remaining valves V1 to V4 and V7 are closed to form a closed circuit between the heat exchanger E and the pretreatment cleaning liquid tank T1. In this state, the first pump M1 is operated to inject the pretreatment washing liquid filled in the pretreatment washing liquid tank T1 into the heat exchanger E. FIG. Then, the pretreatment rinse liquid flows along the corresponding flow path of the heat exchanger E, and then returns to the pretreatment rinse liquid tank T1 through the circulation passage R, and this operation is repeated for a predetermined number of hours.

그리고, 이와 같은 전처리의 마지막 사이클에 도달하면, 밸브(V5)가 닫혀 전처리 세정액 탱크(T1)의 유입로가 차단됨과 동시에, 밸브(V3)가 개방되어 세정액 회수탱크(T3)가 순환유로(R)와 연통한다. 이에 따라 전처리 세정액은 열교환기(E)를 통과한 뒤, 세정액 회수탱크(T3)로 회수되어 일시 저장됨으로써 전처리가 완료된다.When the final cycle of such pretreatment is reached, the valve V5 is closed to block the inflow path of the pretreatment washing liquid tank T1, and at the same time, the valve V3 is opened so that the washing liquid recovery tank T3 is circulated. ) To communicate with. Accordingly, after the pretreatment cleaning liquid passes through the heat exchanger E, the pretreatment cleaning liquid is recovered and temporarily stored in the cleaning liquid recovery tank T3 to complete the pretreatment.

다음, 이와 같이 전처리가 완료되고 나면, 밸브(V4)와 밸브(V6)만 제외하고 나머지 모든 밸브(V1~V3,V5,V7)들을 닫아 열교환기(E)와 후처리 세정액 탱크(T2)간에 폐회로를 구성한다. 이 상태에서, 제2펌프(M2)를 작동시켜 후처리 세정액탱크(T2)내에 충진되어 있는 후처리 세정액을 열교환기(E)에 주입시킨다. 그러면, 후처리 세정액은 열교환기(E)의 해당 유로를 따라 흐른 뒤 순환유로(R)를 통해 후처리 세정액 탱크(T2)로 되돌아오며, 이러한 동작을 설정된 시간동안 반복해서 수행한다.Next, after the pretreatment is completed, all the remaining valves V1 to V3, V5, and V7 except for the valve V4 and the valve V6 are closed, and the heat exchanger E and the post-treatment cleaning liquid tank T2 are closed. Construct a closed circuit. In this state, the second pump M2 is operated to inject the post-treatment cleaning liquid filled in the post-treatment cleaning liquid tank T2 into the heat exchanger E. FIG. Then, the post-treatment cleaning liquid flows along the corresponding flow path of the heat exchanger E, and then returns to the post-treatment cleaning liquid tank T2 through the circulation flow path R, and this operation is repeatedly performed for a predetermined time.

그리고, 이와 같은 후처리의 마지막 사이클에 도달하면, 밸브(V4)가 닫혀 후처리 세정액 탱크(T2)의 유입로가 차단됨과 동시에, 밸브(V3)가 개방되어 세정액 회수탱크(T3)가 순환유로(R)와 연통한다. 이에 따라 후처리 세정액은 열교환기(E)를 통과한 뒤, 세정액 회수탱크(T3)로 회수되어 전처리 세정액과 함께 일시적으로 저장됨으로써 후처리도 완료된다.When the final cycle of such post-treatment is reached, the valve V4 is closed to shut off the inflow path of the post-treatment cleaning liquid tank T2, and at the same time, the valve V3 is opened so that the cleaning liquid recovery tank T3 is circulated. Communicate with (R). Accordingly, after the post-treatment cleaning liquid passes through the heat exchanger (E), the post-treatment cleaning liquid is recovered to the cleaning liquid recovery tank T3 and temporarily stored together with the pretreatment cleaning liquid to complete the post-treatment.

다음, 전처리와 후처리가 모두 완료되고 나면, 밸브(V1)(V2)가 개방되어 냉각탑과 열교환기(E)가 연결됨과 동시에, 밸브(V3~V7)들은 모두 닫힌다. 또한, 제1, 2 펌프(M1)(M2)들도 동작을 멈춤으로써 스케일 제거작업을 마친다. 그리고, 세정액 회수탱크(T3)내에 저장된 폐 전·후처리 세정액은 밸브(V7)를 열어 폐수처리 설비로 이송한다.Next, after both pretreatment and post-treatment are completed, the valves V1 and V2 are opened to connect the cooling tower and the heat exchanger E, and at the same time, the valves V3 to V7 are all closed. In addition, the first and second pumps M1 and M2 also stop the operation to complete the descaling operation. Then, the waste pretreatment and post-treatment cleaning liquid stored in the cleaning liquid recovery tank T3 opens the valve V7 and is transferred to the wastewater treatment facility.

한편, 도 3에는 본 발명에 의한 스케일 제거 시스템의 다른 실시예가 도시되어 있다. 이것은 전술한 실시예의 구성에서, 냉각수 유출라인(C2) 개폐용 밸브와 순환유로(R) 개폐용 밸브를 하나의 삼방밸브(V2′)로 구성하고, 전처리 및 후처리 세정액 탱크(T1)(T2)의 유출부를 서로 연결하여 각각을 냉각수 유입라인(C1)과 선택적으로 연결하는 삼방밸브(V8)를 설치함과 함께 그와 냉각수 유입라인(C1) 간에 하나의 펌프(M)를 설치한 구성이다. 이러한 실시예의 경우, 하나의 펌프(M)로서 전처리 및 후처리 세정액을 모두 순환시킬 수 있어 시스템을 보다 간소화시킬 수 있게 된다.3 shows another embodiment of the descaling system according to the invention. This constitutes a three-way valve (V2 ') for opening and closing the cooling water outlet line (C2) and the opening and closing of the circulation flow path (R) in the configuration of the above-described embodiment, and pretreatment and post-treatment cleaning liquid tank (T1) (T2). ) And a three-way valve (V8) for selectively connecting the outlets of each one to the cooling water inlet line (C1), and one pump (M) is installed between him and the cooling water inlet line (C1). . In such an embodiment, both the pretreatment and posttreatment cleaning liquids can be circulated with one pump M, thereby simplifying the system.

(실시예)(Example)

본 발명자는 시간당 150톤 정도의 냉각수를 사용하는 판형 열교환기를 분해해본 결과 개회로로 구성된 냉각수 유로측에 스케일이 많이 부착되는 것으로 나타나, 냉각수의 성분을 분석해 보았다. 그 결과, Ca 55~58ppm, Mg 51~58ppm, Na 595~637ppm, Fe 0~0.3ppm, Si 2~3ppm, Mn 3~14ppm, K 180~190ppm, Zn 0.3~3ppm 및 T-S 512~547ppm 으로 나타났다.The present inventors have disassembled a plate heat exchanger using about 150 tons of cooling water per hour and found that many scales are attached to the side of the cooling water flow passage composed of open circuits, and analyzed the components of the cooling water. As a result, Ca 55 ~ 58ppm, Mg 51 ~ 58ppm, Na 595 ~ 637ppm, Fe 0 ~ 0.3ppm, Si 2 ~ 3ppm, Mn 3 ~ 14ppm, K 180 ~ 190ppm, Zn 0.3 ~ 3ppm and TS 512 ~ 547ppm .

이에 따라 본 발명자는 전처리 약품으로 시트릭 액시드(citric acid)와 포르믹 액시드(formic acid)를 각각 1~10%의 중량비로 담수와 혼합한 전처리 세정액을 사용하여 전술한 방법으로 약 1~3시간 동안 전처리 하고, 후처리 약품으로 소디움 포스페이트(sodium phosphate)를 1~5%의 중량비로 담수와 혼합한 후처리 세정액을 사용하여 전술한 방법으로 약 0.5~1시간 동안 후처리를 실시하였다. 이 후, 열교환기(E)를 분해하여 육안으로 확인한 결과, 열교환판(P)에 스케일이 부착되어 있지 않은 것으로 나타났다.Accordingly, the present inventors use the pretreatment cleaning solution in which citric acid and formic acid are mixed with fresh water at a weight ratio of 1 to 10%, respectively. After pretreatment for 3 hours, the post-treatment was performed for about 0.5 to 1 hour using the post-treatment cleaning solution in which sodium phosphate was mixed with fresh water in a weight ratio of 1 to 5% as a post-treatment agent. Thereafter, the heat exchanger E was disassembled and visually confirmed, and it was found that no scale was attached to the heat exchanger plate P. FIG.

이상에서 설명한 바와 같이 본 발명에 의하면, 판형 열교환기내에 부착된 스케일을 종래와 달리 열교환기를 분해하지 않으면서 약 1.5 내지 4시간 정도의 매우 짧은 시간안에 확실하게 제거할 수 있게 된다.As described above, according to the present invention, the scale attached to the plate heat exchanger can be reliably removed in a very short time of about 1.5 to 4 hours without disassembling the heat exchanger, unlike the prior art.

또한, 스케일 제거작업을 단순히 밸브조작에 의해 자동으로 수행할 수 있어작업인력 절감과 아울러 스케일 제거작업이 매우 용이해진다. 뿐만 아니라, 스케일 제거에 사용된 세정액과 제거된 스케일에 의한 주변환경 오염이 전혀 발생되지 않는다.In addition, the descaling operation can be performed automatically by simply operating the valve, thereby reducing the manpower and making the descaling operation very easy. In addition, there is no contamination of the surrounding environment by the cleaning liquid used to remove the scale and the removed scale.

따라서 본 발명은, 판형 열교환기의 스케일 제거 작업성과 설비의 가동율 및 생산성 등을 향상시킬 수 있음은 물론 작업인력 감소와 환경오염을 방지할 수 있는 매우 우수한 효과가 있다.Therefore, the present invention can improve the descaling workability of the plate heat exchanger and the operation rate and productivity of the facility, as well as reducing the workforce and preventing environmental pollution.

Claims (3)

온수라인 및 냉각수라인과 연결되어 온도가 다른 두 유체를 서로 열교환시키는 판형 열교환기의 스케일을 제거하기 위한 시스템으로서,A system for descaling a plate heat exchanger connected to a hot water line and a cooling water line to exchange heat between two fluids having different temperatures, 전처리 약품과 물을 적정비율로 혼합한 전처리 세정액이 충진되며, 상기 유체의 유입라인과 연결되는 전처리 세정액 탱크;A pretreatment cleaning liquid tank filled with a pretreatment cleaning liquid mixed with a pretreatment medicine and water at an appropriate ratio and connected to an inflow line of the fluid; 후처리 약품과 물을 적정비율로 혼합한 후처리 세정액이 충진되며, 상기 유체의 유입라인과 연결되는 후처리 세정액 탱크;A post-treatment cleaning liquid tank filled with a post-treatment cleaning liquid in which a post-treatment chemical and water are mixed at an appropriate ratio, and connected to the inflow line of the fluid; 상기 유체의 유출라인과 상기 전처리 및 후처리 세정액 탱크들을 연결하는 순환유로;A circulation passage connecting the outlet line of the fluid and the pretreatment and aftertreatment cleaning liquid tanks; 상기 전처리 세정액 및 후처리 세정액을 상기 열교환기에 각각 순환시키는 세정액 순환수단;Washing liquid circulation means for circulating the pretreatment washing liquid and the post treatment washing liquid to the heat exchanger, respectively; 상기 열교환기를 순환하고난 전처리 및 후처리 세정액이 일시 저장되는 세정액 회수탱크;A cleaning liquid recovery tank in which the pretreatment and post treatment cleaning liquids circulated through the heat exchanger are temporarily stored; 상기 유체의 유입 및 유출라인, 상기 전처리 및 후처리 세정액 탱크의 유입로, 상기 세정액 회수탱크의 유입 및 유출로를 선택적으로 개폐시키는 다수의 밸브;를 포함하여 구성되는 것을 특징으로 하는 판형 열교환기의 스케일 제거 시스템.And a plurality of valves for selectively opening and closing the fluid inflow and outflow lines, the inflow passages of the pretreatment and aftertreatment cleaning liquid tanks, and the inflow and outflow passages of the cleaning liquid recovery tanks. Descaling system. 제 1 항에 있어서, 상기 세정액 순환수단이, 상기 전처리 세정액과 후처리세정액을 각각 순환시키는 제1, 2 펌프로 구성된 것을 특징으로 하는 판형 열교환기의 스케일 제거 시스템.The descaling system of a plate heat exchanger according to claim 1, wherein said washing liquid circulation means comprises first and second pumps for circulating the pretreatment washing liquid and the post treatment washing liquid, respectively. 제 1 항에 있어서, 상기 세정액 순환수단이, 상기 펌프와, 전처리 및 후처리 세정액 탱크을 상기 펌프에 선택적으로 연결시키는 유로전환밸브로 이루어진 것을 특징으로 하는 판형 열교환기의 스케일 제거 시스템.The descaling system of a plate heat exchanger according to claim 1, wherein said washing liquid circulation means comprises a flow path switching valve for selectively connecting said pump and a pretreatment and after treatment cleaning liquid tank to said pump.
KR10-2000-0049425A 2000-08-25 2000-08-25 a scale removal system of heat exchanger KR100472565B1 (en)

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Cited By (10)

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KR100473684B1 (en) * 2000-12-22 2005-03-07 주식회사 포스코 Scale removal apparatus for plate heat changers with the ability of continuous heat changing
KR100473683B1 (en) * 2000-12-22 2005-03-07 주식회사 포스코 Scale removal apparatus for plate heat changers
KR100778751B1 (en) * 2001-08-31 2007-11-23 주식회사 포스코 Scale Removal Method of Plate Type Heat Exchanger by the Using Chemicals
CN103114295A (en) * 2013-03-18 2013-05-22 五力机电科技(昆山)有限公司 Quick cleaning device for furnace body induction coil
KR101348872B1 (en) * 2012-11-12 2014-01-07 이복수 Cleaning apparatus for radiator
KR101508003B1 (en) * 2013-10-11 2015-04-07 주식회사 이노윌 Cleaning Method of Heat Exchanger by using Recycling Method of Rydlyme descaler with Impurity, and Circulative Cleaning System thereof
KR101592880B1 (en) * 2014-09-04 2016-02-11 주식회사 엘에치이 Apparatus and method for chemical cleaning a heat exchanger
CN109654940A (en) * 2019-01-29 2019-04-19 江苏必领能源科技有限公司 A kind of automatic descaling apparatus and its working method of heat pump heat recovery system
CN110595261A (en) * 2019-10-08 2019-12-20 瑞纳智能设备股份有限公司 Cleaning method of hybrid energy heat exchange unit with water quality detection function
CN110701946A (en) * 2019-10-08 2020-01-17 瑞纳智能设备股份有限公司 Cleaning method of hybrid energy heat exchange unit with online pipeline flushing function

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Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54134046A (en) * 1978-04-10 1979-10-18 Kurita Water Ind Ltd Removal of scale
JPS6475895A (en) * 1987-09-16 1989-03-22 Hisaka Works Ltd Method of removing scales
JPH06201280A (en) * 1993-01-05 1994-07-19 Mitsubishi Heavy Ind Ltd Plate heat exchanger
JPH08166197A (en) * 1994-12-12 1996-06-25 Chubu Electric Power Co Inc Slime separating method for heat exchanger

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100473684B1 (en) * 2000-12-22 2005-03-07 주식회사 포스코 Scale removal apparatus for plate heat changers with the ability of continuous heat changing
KR100473683B1 (en) * 2000-12-22 2005-03-07 주식회사 포스코 Scale removal apparatus for plate heat changers
KR100778751B1 (en) * 2001-08-31 2007-11-23 주식회사 포스코 Scale Removal Method of Plate Type Heat Exchanger by the Using Chemicals
KR101348872B1 (en) * 2012-11-12 2014-01-07 이복수 Cleaning apparatus for radiator
CN103114295A (en) * 2013-03-18 2013-05-22 五力机电科技(昆山)有限公司 Quick cleaning device for furnace body induction coil
KR101508003B1 (en) * 2013-10-11 2015-04-07 주식회사 이노윌 Cleaning Method of Heat Exchanger by using Recycling Method of Rydlyme descaler with Impurity, and Circulative Cleaning System thereof
KR101592880B1 (en) * 2014-09-04 2016-02-11 주식회사 엘에치이 Apparatus and method for chemical cleaning a heat exchanger
CN109654940A (en) * 2019-01-29 2019-04-19 江苏必领能源科技有限公司 A kind of automatic descaling apparatus and its working method of heat pump heat recovery system
CN110595261A (en) * 2019-10-08 2019-12-20 瑞纳智能设备股份有限公司 Cleaning method of hybrid energy heat exchange unit with water quality detection function
CN110701946A (en) * 2019-10-08 2020-01-17 瑞纳智能设备股份有限公司 Cleaning method of hybrid energy heat exchange unit with online pipeline flushing function

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