KR100728317B1 - Neutral detergent for cleaning of heat exchanger and producing method thereof - Google Patents
Neutral detergent for cleaning of heat exchanger and producing method thereof Download PDFInfo
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- KR100728317B1 KR100728317B1 KR1020060056404A KR20060056404A KR100728317B1 KR 100728317 B1 KR100728317 B1 KR 100728317B1 KR 1020060056404 A KR1020060056404 A KR 1020060056404A KR 20060056404 A KR20060056404 A KR 20060056404A KR 100728317 B1 KR100728317 B1 KR 100728317B1
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- Prior art keywords
- heat exchanger
- neutral
- solution
- detergent
- citric acid
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- 230000007935 neutral effect Effects 0.000 title claims abstract description 49
- 239000003599 detergent Substances 0.000 title claims abstract description 45
- 238000004140 cleaning Methods 0.000 title claims abstract description 10
- 238000000034 method Methods 0.000 title description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims abstract description 63
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 26
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims abstract description 21
- 235000011114 ammonium hydroxide Nutrition 0.000 claims abstract description 21
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000012964 benzotriazole Substances 0.000 claims abstract description 19
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000004094 surface-active agent Substances 0.000 claims abstract description 19
- 230000003472 neutralizing effect Effects 0.000 claims abstract description 10
- 239000001301 oxygen Substances 0.000 claims abstract description 9
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000005406 washing Methods 0.000 claims description 11
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 9
- 238000006386 neutralization reaction Methods 0.000 claims description 9
- 239000002253 acid Substances 0.000 claims description 8
- 239000002736 nonionic surfactant Substances 0.000 claims description 4
- -1 oxygen peroxide Chemical class 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 5
- 230000002378 acidificating effect Effects 0.000 abstract description 2
- 239000000243 solution Substances 0.000 abstract 5
- 239000003929 acidic solution Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 239000012459 cleaning agent Substances 0.000 description 8
- 238000012546 transfer Methods 0.000 description 7
- 239000012530 fluid Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000007865 diluting Methods 0.000 description 3
- 239000003085 diluting agent Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 150000007522 mineralic acids Chemical group 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/20—Organic compounds containing oxygen
- C11D3/2075—Carboxylic acids-salts thereof
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
- C11D1/66—Non-ionic compounds
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/02—Inorganic compounds ; Elemental compounds
- C11D3/04—Water-soluble compounds
- C11D3/044—Hydroxides or bases
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/26—Organic compounds containing nitrogen
- C11D3/28—Heterocyclic compounds containing nitrogen in the ring
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/39—Organic or inorganic per-compounds
- C11D3/3942—Inorganic per-compounds
-
- C11D2111/20—
Abstract
Description
도 1은 본 발명의 세정제를 침적하기 전의 열교환기 배관에 형성된 스케일 양을 나타내는 열교환기 배관 내부의 각 부분을 나타낸 사진이고, 1 is a photograph showing each part inside the heat exchanger pipe showing the scale amount formed in the heat exchanger pipe before depositing the cleaning agent of the present invention.
도 2는 본 발명의 세정제를 상기 도 1의 열교환기 배관에 1시간 동안 침적한 후의 스케일 양을 나타내는 열교환기 배관 내부의 사진이고, Figure 2 is a photograph of the inside of the heat exchanger pipe showing the scale amount after immersing the cleaning agent of the present invention in the heat exchanger pipe of Figure 1 for 1 hour,
도 3은 본 발명의 세정제를 순환시키기 전의 열교환기의 스케일 양을 나타내는 열교환기 배관 사진이고, 3 is a heat exchanger pipe photograph showing the scale amount of the heat exchanger before circulating the cleaning agent of the present invention,
도 4는 본 발명의 세정제를 상기 도 3의 열교환기 배관에 순환시킨 후의 열교환기의 스케일 양을 나타내는 열교환기 배관 내부의 사진이고, 4 is a photograph of the inside of the heat exchanger pipe showing the scale amount of the heat exchanger after circulating the cleaning agent of the present invention in the heat exchanger pipe of FIG.
도 5는 본 발명의 세정제를 침적하기 전의 판형 열교환기 전열판에 형성된 스케일 양을 나타내는 판열 열교환기 전열판을 나타낸 사진이고, 5 is a photograph showing a plate heat exchanger heat transfer plate showing the scale amount formed on the plate heat exchanger heat transfer plate before the cleaning agent of the present invention is deposited;
도 6은 상기 도 5의 판형 열교환기 전열판에 본 발명의 세정제를 침적시킨 상태를 나타낸 사진이고, 6 is a photograph showing a state in which the cleaning agent of the present invention is deposited on the plate heat exchanger plate of FIG.
도 7은 본 발명의 세정제를 도 5의 판형 열교환기 전열판에 침적시킨 후 전열판의 스케일 양을 나타내는 판형 열교환기 전열판을 나타낸 사진이다. 7 is a photograph showing a plate heat exchanger heat transfer plate indicating the scale amount of the heat transfer plate after the cleaning agent of the present invention is deposited on the plate heat exchanger heat transfer plate of FIG. 5.
본 발명은 열교환기 세척용 중성 세정제 및 이의 제조방법에 관한 것으로서, 보다 상세하게는 구연산과 암모니아수의 중화로 이루어진 약산 또는 중성 용액, 과산화수소, 계면활성제 및 벤조트리아졸을 포함하는 열교환기 세척용 중성 세정제, 및 상기 열교환기 세척용 중성 세정제의 제조방법에 관한 것이다.The present invention relates to a neutral detergent for washing a heat exchanger and a method for manufacturing the same, and more particularly, a neutral detergent for washing a heat exchanger including a weak acid or neutral solution consisting of neutralization of citric acid and aqueous ammonia, hydrogen peroxide, a surfactant, and benzotriazole. And a neutral detergent for washing the heat exchanger.
스케일 형성 물질의 비용해성 때문에 유입되는 슬러지가 가열될 때 열교환기에 스케일이 형성된다. 열조절 후 상기 물질들이 용해도를 초과하여 용액내에 과량으로 존재하므로 스케일 형성이 증가된다. 따라서, 스케일을 제거하기 위하여 열교환기의 세척과 보수가 필요하게 되므로 열교환기의 작동을 정지시키고 화학약품을 사용하게 된다.Because of the insolubility of the scale forming material, scale is formed in the heat exchanger when the incoming sludge is heated. After heat control the scale formation is increased because the materials are present in excess in solution beyond solubility. Therefore, since the heat exchanger needs to be cleaned and repaired to remove the scale, the operation of the heat exchanger is stopped and chemicals are used.
이와 같이, 산업의 발달과 규모의 증가는 열교환 시스템의 증가를 가져오게 되며 열교환기에 발생하는 스케일을 제거하기 위해 많은 세정제를 사용하게 된다. 그러나, 물에 의한 스케일의 주성분은 Ca+2, Mg+2 등으로 이루어져 있어 산성에 의해서만 분해가 되는 것으로 인식되고 있다. 즉, 무기산 또는 유기산의 조성물로 되어 제품이 강산성으로서 인체에 유해하게 되며 제품이 하천 등에 유입될 경우 환경 오염이 발생하게 된다. 이러한 이유로 중성 세정제의 연구 개발 및 상업화는 지난 수십 년간 꾸준히 진행되어 현재까지도 국내외에서 기술 개발이 이루어지고 있다. 특히, 최근에는 환경문제가 대두되면서 친환경 제품에 대한 소비자의 욕구가 특히 강하며 업체들에서 중성의 세정제를 개발하고자 하고 있으나, 성능과 환경조건을 만족시키는 제품은 개발되지 않고 있다.As such, the development of the industry and the increase in scale will lead to an increase in the heat exchange system, and many cleaners will be used to remove the scale generated in the heat exchanger. However, since the main component of the scale by water consists of Ca +2 , Mg +2, etc., it is recognized that it is decomposed only by acid. In other words, the composition of the inorganic acid or organic acid is a product that is harmful to the human body as a strong acid and environmental pollution occurs when the product flows into the river. For this reason, research and development and commercialization of neutral detergents have been steadily going on for decades, and technology development has been made at home and abroad. In particular, in recent years, as environmental problems have emerged, the consumer's desire for eco-friendly products is particularly strong and companies are trying to develop neutral detergents, but products that satisfy performance and environmental conditions have not been developed.
이에, 본 발명자들은 스케일, 녹 및 기름을 제거하면서 환경에 미치는 영향이 적은 친환경 제품을 개발하고자 노력하던 중, 구연산과 암모니아수의 중화로 이루어진 용액에 과산화수소, 계면활성제 및 벤조트리아졸 첨가한 세정제가 중성의 pH를 가지면서도 스케일, 녹 및 기름을 용이하게 제거시킴을 발견함으로써 본 발명을 완성하였다.Accordingly, the present inventors are trying to develop an eco-friendly product with low environmental impact while removing scale, rust and oil, and the detergent added with hydrogen peroxide, surfactant and benzotriazole to a solution composed of neutralization of citric acid and ammonia water is neutral. The present invention has been completed by the discovery that the scale, rust and oil are easily removed while having a pH of.
본 발명의 목적은 중성의 pH에서 스케일, 녹 및 기름을 용이하게 제거시키는 열교환기 세척용 중성 세정제를 제공하는 것이다.It is an object of the present invention to provide a neutral detergent for cleaning heat exchangers that readily removes scale, rust and oil at neutral pH.
본 발명의 또 다른 목적은 상기 열교환기 세척용 중성 세정제의 제조방법을 제공하는 것이다.Still another object of the present invention is to provide a method of preparing a neutral detergent for washing the heat exchanger.
상기 목적을 달성하기 위하여, 본 발명은 구연산(Citric Acid)과 암모니아 수(NH4OH)의 중화로 이루어진 약산 또는 중성 용액, 과산화수소(H2O2), 계면활성제 및 벤조트리아졸(Benzotriazole; B.T.)을 포함하는 열교환기 세척용 중성 세정제를 제공한다.In order to achieve the above object, the present invention is a weak or neutral solution consisting of neutralization of citric acid and aqueous ammonia (NH 4 OH), hydrogen peroxide (H 2 O 2 ), surfactants and benzotriazole (Benzotriazole; BT It provides a neutral detergent for washing the heat exchanger comprising a).
또한, 본 발명은 구연산을 암모니아수로 약산 또는 중성 용액으로 중화시키는 단계; 상기 중화 중화용액에 과산화수소를 첨가시켜 산소 기포를 발생시키는 단계; 상기 용액에 계면활성제를 첨가시키는 단계; 및 상기 용액에 벤조트리아졸을 첨가시키는 단계를 포함하는, 상기 열교환기 세척용 중성 세정제의 제조방법을 제공한다.In addition, the present invention comprises the steps of neutralizing citric acid to weak acid or neutral solution with ammonia water; Adding oxygen peroxide to the neutralizing solution to generate oxygen bubbles; Adding a surfactant to the solution; And it provides a method for producing a neutral detergent for washing the heat exchanger comprising the step of adding benzotriazole to the solution.
본 발명을 설명함에 있어서 사용되는 기술 용어 및 과학 용어에 있어서 다른 정의가 없다면, 이 발명이 속하는 기술 분야에서 통상의 지식을 가진 자가 통상적으로 이해하고 있는 의미를 가진다.Unless otherwise defined in the technical and scientific terms used in describing the present invention, those having ordinary skill in the art to which the present invention pertains generally have meanings.
이하, 본 발명을 보다 상세히 설명한다.Hereinafter, the present invention will be described in more detail.
본 발명은 구연산과 암모니아수의 중화로 이루어진 약산 또는 중성 용액, 과산화수소, 계면활성제 및 벤조트리아졸을 포함하는 열교환기 세척용 중성 세정제를 제공한다.The present invention provides a neutral detergent for cleaning a heat exchanger comprising a weak acid or neutral solution consisting of neutralization of citric acid and aqueous ammonia, hydrogen peroxide, a surfactant, and benzotriazole.
상기 본 발명의 열교환기 세척용 중성 세정제에 있어서, 상기 구연산과 암모니아수의 중화 용액은 pH 5.0~7.0인 것이 바람직하고, 5.8~6.0인 것이 보다 바람직 하다. In the neutral detergent for washing the heat exchanger of the present invention, the neutralizing solution of citric acid and aqueous ammonia is preferably pH 5.0 to 7.0, more preferably 5.8 to 6.0.
또한, 상기 본 발명의 열교환기 세척용 중성 세정제에 있어서, 상기 구연산 : 암모니아수의 질량%비가 40: 25~40인 것이 바람직하고, 40: 32인 것이 보다 바람직하다. 이때, 상기 상기 구연산과 암모니아수의 중화 용액 72 중량부에 대하여, 상기 과산화수소는 5~20 중량부, 계면활성제는 0.01~2 중량부 및 벤조트리아졸 0.001~1 중량부인 것이 바람직하고, 과산화수소는 12 중량부, 계면활성제는 0.1~0.5 중량부 및 벤조트리아졸 0.01~0.1 중량부인 것이 보다 바람직하다.Further, in the neutral detergent for washing the heat exchanger of the present invention, the mass% ratio of citric acid to aqueous ammonia is preferably 40:25 to 40, and more preferably 40:32. In this case, it is preferable that the hydrogen peroxide is 5 to 20 parts by weight, the surfactant is 0.01 to 2 parts by weight and the benzotriazole is 0.001 to 1 part by weight, and the hydrogen peroxide is 12 parts by weight based on 72 parts by weight of the neutralization solution of citric acid and ammonia water. In addition, it is more preferable that surfactant is 0.1-0.5 weight part and 0.01-0.1 weight part of benzotriazole.
아울러, 상기 본 발명의 열교환기 세척용 중성 세정제에 있어서, 상기 계면활성제는 비이온형(non-ion) 계면활성제인 것이 바람직하고, 상기 세정제는 스케일 또는 녹 제거에 이용되는 것이 바람직하다.In addition, in the neutral detergent for washing the heat exchanger of the present invention, the surfactant is preferably a non-ionic surfactant, and the detergent is preferably used to remove scale or rust.
본 발명은 열교환기 등에 생성되는 스케일 및 녹의 제거를 위해서, (a) 구연산을 (b) 암모니아수(NH4OH 28%)로 pH 5.8~6.0까지 중화시켜 중량 60~65%의 조성물을 제조한다. 이와 같이, 중화된 용액에 (c) 중량 12%의 과산화수소를 첨가시켜 산소(O2)로 기포를 발생시켜 상기 조성물에 의하여 Ca+2, Mg+2 등의 양이온에 의하여 유발된 스케일과 1차적으로 반응함으로써 과산화수소에 의하여 O2 산소 기포로 스케일을 분해하게 된다. 특히, 과산화수소는 물에서 자주 발생되는 미생물, 즉 이끼류와 박테리아 등의 각종 미생물로 인한 슬라임(Slime)까지도 세정할 수 있는 기능도 수반한다. In the present invention, in order to remove scale and rust generated in a heat exchanger or the like, (a) citric acid is neutralized with (b) ammonia water (NH 4 OH 28%) to pH 5.8 to 6.0 to prepare a composition having a weight of 60 to 65%. As such, (c) 12% by weight of hydrogen peroxide is added to the neutralized solution to generate bubbles with oxygen (O 2 ), and the scale and primary induced by cations such as Ca +2 and Mg +2 by the composition. By reacting with hydrogen peroxide, the scale is decomposed into O 2 oxygen bubbles. In particular, hydrogen peroxide is accompanied by a function that can clean even slimes caused by various microorganisms, such as moss and bacteria, which are frequently generated in water.
여기에 추가적으로 기름제거를 위해서, (d) 계면활성제는 특별히 종류가 제한되는 것은 아니지만, 비이온형 계면활성제(Non-Ion)를 사용하는 것이 바람직하며 세정작업 중에 발생할 수 있는 거품을 줄여 저기포성 세정제를 가능케 한다. 따라서, 세제의 제조 중에 발생하는 거품을 줄일 수 있다면 특정한 계면활성제에 구애됨이 없이 사용가능하다. 또한, (e) 벤조트리아졸의 첨가는 열교환기의 주재료로 사용되는 동(copper) 등의 금속의 부식을 방지하는데 탁월한 작용을 한다.In addition to the oil removal, (d) surfactants are not particularly limited in kind, but it is preferable to use a non-ionic surfactant (Non-Ion), it is a low-foaming detergent to reduce the foam that can occur during the cleaning operation Makes it possible. Therefore, if the foam generated during the preparation of the detergent can be reduced, it can be used without regard to the specific surfactant. In addition, (e) addition of benzotriazole plays an excellent role in preventing corrosion of metals such as copper used as the main material of the heat exchanger.
또한, 본 발명은 ⅰ) 구연산을 암모니아수로 약산 또는 중성 용액으로 중화시키는 단계; ⅱ) 상기 중화 중화용액에 과산화수소를 첨가시켜 산소 기포를 발생시키는 단계; ⅲ) 상기 ⅱ) 용액에 계면활성제를 첨가시키는 단계; 및 ⅳ) 상기 ⅲ) 용액에 벤조트리아졸을 첨가시키는 단계를 포함하는, 상기 열교환기 세척용 중성 세정제의 제조방법을 제공한다.In addition, the present invention comprises the steps of: iii) neutralizing citric acid to weak acid or neutral solution with aqueous ammonia; Ii) adding oxygen peroxide to the neutralizing solution to generate oxygen bubbles; Iii) adding a surfactant to the solution ii); And iii) adding benzotriazole to the solution iii).
본 발명자들은 구연산과 암모니아수를 반응시켜 pH 5.8~6.0 중화용액을 제조하고, 여기에 과산화수소수, 계면활성제 및 벤트리아졸을 순서대로 투입하고, 추가적으로 물을 보충하고 교반시켜 완전 용해된 중성 세정제를 제조하였다. SUS 열교환기의 튜브 내부에 상기 제조된 세정제의 희석액을 침적시키면 스케일이 완전히 분해된다(도 1 및 도 2 참조). 또한, 열교환기에 상기 제조된 세정제의 희석액으로 순환시키면 스케일과 녹이 완전히 분해된다(도 3 및 도 4 참조). 아울러, 판형 열교환기의 전열판에 상기 제조된 세정제의 희석액을 침적시키면 스케일과 녹이 완 전히 분해된다(도 5 내지 도 7 참조).The present inventors prepared a neutralizing solution of pH 5.8-6.0 by reacting citric acid and ammonia water, and then added hydrogen peroxide solution, surfactant and ventrazole in this order, and supplemented with water to prepare a neutral detergent completely dissolved. . Dipping the diluent of the prepared detergent into the tube of the SUS heat exchanger completely decomposes the scale (see FIGS. 1 and 2). In addition, circulating with a diluent of the prepared detergent in a heat exchanger completely decomposes scale and rust (see FIGS. 3 and 4). In addition, when the diluent of the prepared detergent is deposited on the heat transfer plate of the plate heat exchanger, the scale and rust are completely decomposed (see FIGS. 5 to 7).
이와 같이 상기 본 발명의 중성 세정제는 스케일과 녹의 제거에 효과적이어서, 여러가지 열교환기의 스케일, 녹, 슬라임 등의 제거에 효과적으로 이용가능하다.Thus, the neutral detergent of the present invention is effective in removing scale and rust, and can be effectively used to remove scale, rust, slime, etc. of various heat exchangers.
이하, 본 발명을 실시예에 의해 상세히 설명한다.Hereinafter, the present invention will be described in detail by way of examples.
단, 하기 실시예는 본 발명을 예시하는 것일 뿐, 본 발명의 내용이 하기 실시예에 한정되는 것은 아니다.However, the following examples are merely to illustrate the invention, but the content of the present invention is not limited to the following examples.
< 실시예 1 > 연료첨가용 중성 세정제의 제조Example 1 Preparation of Neutral Cleanser for Fuel Addition
40% 구연산(Citric acid)을 혼합기에 투입하고, 혼합기를 회전시키면서 중량 32% 암모니아수(NH4OH 28%)를 서서히 투입하여 pH 5.8~6.0 중화용액을 제조하였다. 상기 용액에 중량 12% 과산화수소수(H2O2), 0.1~0.5% 계면활성제 및 중량 0.01~0.1%의 벤트리아졸(Benzotriazole; B.T)을 순서대로 투입하고, 추가적으로 물을 보충한 뒤 1시간 이상 교반하여 완전 용해된 중성 세정제를 제조하였다.40% citric acid was added to the mixer, and a 32% aqueous ammonia (NH 4 OH 28%) was slowly added while rotating the mixer to prepare a pH 5.8-6.0 neutralizing solution. 12% hydrogen peroxide solution (H 2 O 2 ), 0.1-0.5% surfactant, and 0.01-0.1% Benzotriazole (BT) were added to the solution in this order, and additional water was added for at least 1 hour. Agitated to prepare a fully dissolved neutral detergent.
< 실시예 2 > 중성 세정제에 의한 SUS 열교환기의 튜브 내부 스케일 제거 실험Example 2 In-tube Descaling Experiment of SUS Heat Exchanger with Neutral Cleaner
상기 실시예 1에서 제조된 세정제를 물로 10배 희석한 뒤, 냉각수를 유체로 20년 사용한 열교환기의 튜브를 샘플 채취하여 여기에 상기 희석된 세정제를 1시간 동안 침적시켰다. 1시간 후에 스케일의 분해 상태를 육안으로 확인한 결과, 스케일이 완전히 분해되었음을 확인하였다(도 1 및 도 2).After diluting the detergent prepared in Example 1 with water 10 times, the tube of the heat exchanger used for 20 years as a cooling water as a fluid was sampled, and the diluted detergent was deposited for 1 hour. As a result of visually confirming the decomposition state of the scale after 1 hour, it was confirmed that the scale was completely decomposed (FIGS. 1 and 2).
< 실시예 3 > 중성 세정제에 의한 열교환기의 스케일 제거 실험Example 3 Descaling Experiment of Heat Exchanger with Neutral Cleaner
상기 실시예 1에서 제조된 세정제를 물로 10배 희석한 뒤, 냉각수를 유체로 사용한 열교환기에 상기 희석된 세정제를 4시간 동안 순환시켰다. 4시간 후에 스케일과 녹의 제거 상태를 육안으로 확인한 결과, 스케일과 녹이 완전히 분해되었음을 확인하였다(도 3 및 도 4).After diluting the detergent prepared in Example 1 with water 10 times, the diluted detergent was circulated for 4 hours in a heat exchanger using cooling water as a fluid. After 4 hours, the scale and rust removal were visually confirmed, and it was confirmed that the scale and rust were completely decomposed (FIGS. 3 and 4).
< 실시예 4 > 중성 세정제에 의한 판(PLATE)형 열교환기의 스케일 제거 실험Example 4 Descaling Experiment of Plate Heat Exchanger with Neutral Cleaner
상기 실시예 1에서 제조된 세정제를 물로 10배 희석한 뒤, 난방수를 유체로 사용한 판형 열교환기의 전열판에 상기 희석된 세정액를 1시간 동안 침적시켰다. 1시간 후에 스케일과 녹의 제거 상태를 육안으로 확인한 결과, 스케일과 녹이 완전히 분해되었음을 확인하였다(도 5 내지 도 7).After diluting the detergent prepared in Example 1 with water 10 times, the diluted cleaning solution was deposited on the heat transfer plate of the plate heat exchanger using heating water as a fluid for 1 hour. After 1 hour, the scale and rust removal were visually confirmed, and it was confirmed that the scale and rust were completely decomposed (FIGS. 5 to 7).
이와 같이 상기 실시예 2 내지 실시예 4에서 육안 관찰에 의하여 살펴본 바와 같이, SUS 열교환기의 튜브 내부 스케일, 열교환기의 스케일, 판형 열교환기의 스케일의 제거에 있어서, 본 발명의 중성 세정제가 효과적으로 스케일과 녹을 제거시킴을 확인할 수 있었다. 따라서, 본 발명의 중성 세정제는 기타 여러가지 열교환기의 스케일, 녹, 슬라임 등의 제거에 효과적이다.As described above by visual observation in Examples 2 to 4, the neutral detergent of the present invention effectively scales the removal of the internal scale of the tube of the SUS heat exchanger, the scale of the heat exchanger, and the scale of the plate heat exchanger. It was confirmed that the removal of rust. Therefore, the neutral detergent of the present invention is effective for removing scale, rust, slime, and the like of various other heat exchangers.
상기에서 살펴본 바와 같이, 본 발명의 세정제는 중성의 pH에서 스케일과 녹을 분해시켜 제거함에 있어서, 일액형의 타입으로 사용가능하며, 열교환기에서 물을 유체로 사용하는 경우 발생되는 각종 유기, 무기질에 의한 스케일, 기름, 녹 등을 동시에 제거시킬 수 있어 열교환기의 열조절의 효율과 성능을 개량시키기 위하여 유용하게 사용될 수 있다. 아울러, 본 발명의 세정제는 중성 용액으로 산성 세정제에 비하여 안정성이 뛰어나 열교환기의 모재인 동(copper), 철(steel) 및 스테인레스 등에 손상을 주지 않을 뿐만 아니라 작업자에게도 산성의 조성물에 비해 안전하고 환경에 미치는 영향도 대단히 적어 폐수방류기준을 초과하지 않는 친환경 세정제이다.As described above, the cleaning agent of the present invention can be used as a one-component type to decompose and remove scale and rust at a neutral pH, and to various organic and inorganic substances generated when water is used as a fluid in a heat exchanger. By removing the scale, oil, rust, etc. can be usefully used to improve the efficiency and performance of heat control of the heat exchanger. In addition, the detergent of the present invention is a neutral solution, which is more stable than an acid cleaner, does not damage copper, steel, and stainless, which are the base materials of the heat exchanger, and is safer for workers than the acidic composition. It is an environmentally friendly cleaner that does not exceed the wastewater discharge standard because it has a very small impact on water.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR960024228A (en) * | 1994-12-09 | 1996-07-20 | 김만제 | Cleaning method of heat exchanger for ordination cooling |
| US20010004081A1 (en) * | 1999-12-16 | 2001-06-21 | Robert Tansley | Bottled liquid dispensers |
| JP2004002861A (en) * | 2003-05-16 | 2004-01-08 | Kao Corp | Detergent for heat-exchanger fin |
| US6740168B2 (en) | 2001-06-20 | 2004-05-25 | Dominion Engineering Inc. | Scale conditioning agents |
| KR20050005140A (en) * | 2003-07-03 | 2005-01-13 | 한국남부발전 주식회사 | Scale Remover on Gas-Gas Heater Heating Element in Desulfurization System and Method Therefor |
| KR20050033336A (en) * | 2003-10-06 | 2005-04-12 | 한국전력공사 | Cleaning agent for removing metal oxides |
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2006
- 2006-06-22 KR KR1020060056404A patent/KR100728317B1/en not_active IP Right Cessation
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR960024228A (en) * | 1994-12-09 | 1996-07-20 | 김만제 | Cleaning method of heat exchanger for ordination cooling |
| US20010004081A1 (en) * | 1999-12-16 | 2001-06-21 | Robert Tansley | Bottled liquid dispensers |
| US6740168B2 (en) | 2001-06-20 | 2004-05-25 | Dominion Engineering Inc. | Scale conditioning agents |
| JP2004002861A (en) * | 2003-05-16 | 2004-01-08 | Kao Corp | Detergent for heat-exchanger fin |
| KR20050005140A (en) * | 2003-07-03 | 2005-01-13 | 한국남부발전 주식회사 | Scale Remover on Gas-Gas Heater Heating Element in Desulfurization System and Method Therefor |
| KR20050033336A (en) * | 2003-10-06 | 2005-04-12 | 한국전력공사 | Cleaning agent for removing metal oxides |
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