KR100965460B1 - Device for cleaning water-detecting sensor using vacuum in the exhaust duct in the steel making process - Google Patents

Device for cleaning water-detecting sensor using vacuum in the exhaust duct in the steel making process Download PDF

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Publication number
KR100965460B1
KR100965460B1 KR1020030036330A KR20030036330A KR100965460B1 KR 100965460 B1 KR100965460 B1 KR 100965460B1 KR 1020030036330 A KR1020030036330 A KR 1020030036330A KR 20030036330 A KR20030036330 A KR 20030036330A KR 100965460 B1 KR100965460 B1 KR 100965460B1
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South Korea
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detection rod
leak detector
vacuum
outer case
gas cooler
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KR1020030036330A
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Korean (ko)
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KR20040107589A (en
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정효철
김명화
민원기
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주식회사 포스코
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V33/00—Structural combinations of lighting devices with other articles, not otherwise provided for
    • F21V33/0004—Personal or domestic articles
    • F21V33/0024—Household or table equipment
    • F21V33/0028—Decorative household equipment, e.g. plant holders or food dummies
    • F21V33/0032—Paintings, pictures or photographs; Frames therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/04—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2121/00—Use or application of lighting devices or systems for decorative purposes, not provided for in codes F21W2102/00 – F21W2107/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/30—Lighting for domestic or personal use
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S362/00—Illumination
    • Y10S362/806—Ornamental or decorative

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

본 발명은 제철소의 제강공정에서 용강래들의 상부에 진공조를 사용하여 진공탈가스를 수행하는 공정 및 장치에 있어서, 진공조의 배기덕트에 설치된 가스쿨러 내에 장착된 누수검지기의 세정장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning apparatus for a leak detector mounted in a gas cooler installed in an exhaust duct of a vacuum tank in a process and an apparatus for performing vacuum degassing using a vacuum tank on top of molten steel ladles in a steelmaking process of a steel mill.

본 발명에서는 누수검지기의 검지봉의 주위를 감싸도록 설치되는 외부케이스와 검지봉과 외부케이스의 사이에서 검지봉을 감싸도록 장착되며 한쪽 끝에 세정구가 부착된 스프링과 누수검지기의 플랜지쪽에는 외부케이스 내로 연통되도록 설치되는 에어라인과 질소퍼지라인으로 이루어지는 것을 특징으로 하는 누수검지기 세정장치를 제공한다.In the present invention, the outer case is installed to surround the detection rod of the leak detector and the detection rod is installed between the detection rod and the outer case, and the spring is attached to the cleaning port at one end and the flange side of the leak detector communicates into the outer case. Provided is a leak detector cleaning device, characterized in that consisting of air line and nitrogen purge line is installed.

검지봉을 둘러싼 세정구의 반복적인 동작으로 검지봉의 문제점인 더스트 부착이 방지되고 검지기 설비를 취외하지 않고 정비할 수 있어 연속적인 탈가스조업이 가능하고 정비발생을 방지하여 정비비 절감 및 생산성 향상에 크게 기여한다.Repetitive operation of the cleaning tool around the detection rod prevents dust attachment, which is a problem of the detection rod, and maintenance without leaving the detector equipment, enabling continuous degassing operation and preventing maintenance, greatly reducing maintenance costs and improving productivity. do.

가스쿨러, 누수검지기, 검지봉, 세정장치, 에어라인, 질소퍼지라인 Gas cooler, leak detector, detection rod, cleaning device, air line, nitrogen purge line

Description

제강공정의 배기덕트에서 진공을 이용한 누수검지기 세정장치{Device for cleaning water-detecting sensor using vacuum in the exhaust duct in the steel making process}Device for cleaning water-detecting sensor using vacuum in the exhaust duct in the steel making process}

도 1은 진공탈가스 설비의 개략도,1 is a schematic view of a vacuum degassing plant,

도 2는 종래의 배기가스가 지나는 가스쿨러내부의 누수검지기 설치도,2 is a view of installing a leak detector inside a gas cooler through which a conventional exhaust gas passes;

도 3은 (가) 종래의 누수검지기의 사시도, 3 is a perspective view of a conventional leak detector,

(나) 종래의 누수검지기의 검지봉에의 더스트 부착 상황도,(B) The state with the dust to the detection rod of the conventional leak detector,

도 4는 본 발명의 세정장치의 단면도 및 평면도,4 is a cross-sectional view and a plan view of the cleaning apparatus of the present invention;

도 5는 본 발명의 세정장치의 작동 상태도,5 is an operating state of the cleaning device of the present invention,

도 6은 본 발명의 세정장치에의 가스관의 연결도이다.6 is a connection diagram of a gas pipe to the cleaning device of the present invention.

♣도면의 주요부분에 대한 부호의 설명♣♣ Explanation of symbols for main part of drawing ♣

1 : 용강래들 2 : 진공조 3 : 배기덕트1: molten steel ladle 2: vacuum chamber 3: exhaust duct

4 : 가스쿨러 5 : 질소 복압밸브 6 : 부스터4 gas cooler 5 nitrogen double pressure valve 6 booster

7 : 콘덴서 8 : 스팀 저장탱크 9 : 이젝터7 condenser 8 steam storage tank 9 ejector

10 : 워터링 펌프 11 : 배기밸브 12 : 가스쿨러 입측DESCRIPTION OF SYMBOLS 10 Watering pump 11 Exhaust valve 12 Gas cooler entrance side

13 : 가스쿨러파이프 14 : 가스쿨러 출측 15 : 누수검지기13: gas cooler pipe 14: gas cooler exit 15: leak detector

16 : 누수검지기 케이블 17 : 플랜지 18 : 검지봉 16: leak detector cable 17: flange 18: detection rod                 

19 : 카본 더스트 20 : 볼트구멍 21 : 에어밸브19: carbon dust 20: bolt hole 21: air valve

22 : 상부 캡 23 : 질소 퍼지밸브 24 : 외부 케이스22: upper cap 23: nitrogen purge valve 24: outer case

25 : 스프링 고정대 26 : 세정장치 27 : 스토퍼25 spring holder 26 cleaning device 27 stopper

28 : 질소 퍼지라인28: nitrogen purge line

본 발명은 제철소의 제강공정에서 용강래들의 상부에 진공조를 사용하여 진공탈가스를 수행하는 공정 및 장치에 있어서, 진공조의 배기덕트에 설치된 가스쿨러 내에 장착된 누수검지기의 세정장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning apparatus for a leak detector mounted in a gas cooler installed in an exhaust duct of a vacuum tank in a process and an apparatus for performing vacuum degassing using a vacuum tank on top of molten steel ladles in a steelmaking process of a steel mill.

상기 진공탈가스 공정 및 장치를 도 1로부터 살펴보면, 용강래들(1)에 담겨진 용강을 탈가스 정련작업할 때에 진공조(2) 내부에서 발생되는 고온의 열과 분진은 배기덕트(3)를 통하여 가스쿨러(4)를 통과하며 냉각되고, 진공펌프 유니트인 부스터(Booster)(6), 콘덴서(7), 스팀저장탱크(8), 이젝터(Ejector)(9), 워터링펌프(10), 배기밸브(11)를 거쳐 스택을 통하여 대기로 방출된다. 미설명부호 5는 질소복압밸브이다.Referring to the vacuum degassing process and apparatus from FIG. 1, the high temperature heat and dust generated inside the vacuum chamber 2 during the degassing and refining operation of the molten steel contained in the molten steel ladle 1 are carried out through the exhaust duct 3. Cooled through the gas cooler (4), the booster (Booster) (6), condenser (7), steam storage tank (8), ejector (9), watering pump (10), It is discharged to the atmosphere through the stack via the exhaust valve (11). Reference numeral 5 is a nitrogen double pressure valve.

가스쿨러(4)를 좀더 구체적으로 살펴보면, 도 2에서 보듯이, 고열가스와 분진이 가스쿨러(4)의 가스쿨러입측(12)으로 들어와서, 가스쿨러(4) 내부에 설치되어 있는 가스쿨러파이프(13)를 통과하여 가스쿨러 출측(14)으로 배기된다. 가스쿨러파이프(13)의 내부에 물을 통과하여 가스쿨러(4)를 거치는 배기가스의 온도를 저하시 킨다. 이 때 가스쿨러파이프(13)의 아래쪽 경사진 곳에 누수검지기(15)가 장착되어 있으며, 이 누수검지기(15)는 상기 가스쿨러파이프(13)의 파손 발생시 내부에 냉각수가 차는 것을 방지하기 위한 목적으로 설치된 것이다.Looking at the gas cooler 4 in more detail, as shown in Figure 2, the hot gas and dust enters the gas cooler entry side 12 of the gas cooler 4, the gas cooler is installed inside the gas cooler 4 It passes through the pipe 13 and is exhausted to the gas cooler exit side 14. The temperature of the exhaust gas passing through the gas cooler 4 is reduced by passing water through the gas cooler pipe 13. At this time, the leak detector 15 is mounted on the inclined lower portion of the gas cooler pipe 13, and the leak detector 15 is intended to prevent the coolant from filling inside when the gas cooler pipe 13 is damaged. It is installed as.

종래의 누수검지기(15)는 도 3의 (가)에서 보듯이 플랜지(17)위에 검지봉(18)이 원통형으로 길게 연장되어 있어 누수를 검지하게 되고, 플랜지(17)의 한 쪽에는 케이블(16)이 끼워져 있어 신호를 전달한다.In the conventional leak detector 15, as shown in FIG. 3A, the detection rod 18 is extended in a cylindrical shape on the flange 17 to detect a leak, and one side of the flange 17 has a cable ( 16) is fitted to carry a signal.

그러나, 가스쿨러(4)에서의 가스의 냉각시 배기덕트(3)를 통하여 흡입된 고열 가스분진이 가스쿨러 입측(12)으로 흡입되어지면 흡입된 가스 분진 일부가 가스쿨러파이프(13)의 표면에 흡착되고, 일부는 가스쿨러(4)의 하부로 유입되어 가스쿨러(4)의 내부에 저장되어 있다가 작업자에 의하여 밖으로 배출된다. 이 때 도 3의 (나)와 같이 가스분진, 즉 카본더스트(19)가 누수검지기(15)의 검지봉(18) 표면에 흡착되어 고착된다.However, if the high temperature gas dust sucked in through the exhaust duct 3 is sucked into the gas cooler inlet 12 during the cooling of the gas in the gas cooler 4, a part of the sucked gas dust is formed on the surface of the gas cooler pipe 13. Is adsorbed to the lower part of the gas cooler 4, stored in the gas cooler 4, and discharged out by the worker. At this time, as shown in FIG. 3B, gas dust, that is, carbon dust 19, is adsorbed and fixed to the surface of the detection rod 18 of the leak detector 15.

이와 같이 검지봉(18)의 표면에 카본더스트(19)가 부착되면 검지봉(18)은 이를 검지하게 되고 검지센서가 이를 감지하여 탈가스 작업이 긴급 정지되는 문제가 발생되고 있다. As described above, when the carbon dust 19 is attached to the surface of the detection rod 18, the detection rod 18 detects this, and the detection sensor detects this to cause an emergency stop of degassing.

본 발명은 전술한 종래기술의 문제점을 해결하기 위하여 안출된 것으로서, 가스쿨러의 내부의 배기가스의 온도를 저하시키는 과정과 더스트를 포집하는 과정에서 가스쿨러의 하단부에 설치되어 있는 누수검지기의 검지봉에 부착 고착되는 더스트를 누수검지기의 취외작업 없이 진공탈가스작업 중에 진공도를 이용하여 다른 기구를 사용하지 않고 자동으로 청소가 가능한 세정장치를 제공하는데 그 목적이 있다.The present invention has been made to solve the above-mentioned problems of the prior art, the detection rod of the leak detector is installed on the lower end of the gas cooler in the process of lowering the temperature of the exhaust gas inside the gas cooler and collecting dust It is an object of the present invention to provide a cleaning device that can automatically clean dust adhered to the dust, without using other instruments by using a degree of vacuum during a vacuum degassing operation without taking out a leak detector.

본 발명에서는 누수검지기의 검지봉의 주위를 감싸도록 설치되는 외부케이스와 검지봉과 외부케이스의 사이에서 검지봉을 감싸도록 장착되며 한쪽 끝에 세정구가 부착된 스프링과 누수검지기의 플랜지 쪽에는 외부케이스 내로 연통되도록 설치되는 에어라인과 질소퍼지라인으로 이루어지는 것을 특징으로 하는 누수검지기 세정장치를 제공한다.In the present invention, the outer case is installed to surround the detection rod of the leak detector and the detection rod is installed between the detection rod and the outer case, and the spring is attached to the cleaning port at one end and the flange side of the leak detector communicates into the outer case. Provided is a leak detector cleaning device, characterized in that consisting of air line and nitrogen purge line is installed.

또한, 본 발명에서는 상기 검지봉의 한쪽 끝에 스토퍼가 설치된 것을 특징으로 하는 누수검지기 세정장치를 제공한다.In addition, the present invention provides a leak detector cleaning device, characterized in that a stopper is provided at one end of the detection rod.

또한, 본 발명에서는 상기 세정구가 부도체의 가스켓 클리너인 것을 특징으로 하는 누수검지기 세정장치를 제공한다.In addition, the present invention provides a leak detector cleaning device, characterized in that the cleaning device is a gasket cleaner of a non-conductor.

이하, 도면을 참조하여 본 발명의 일실시예를 설명한다.Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

도 4는 본 발명의 세정장치의 단면도 및 평면도이다.4 is a cross-sectional view and a plan view of the cleaning apparatus of the present invention.

본 발명은 원형의 플랜지(17) 중간 부분에 각각 검지봉(18)과 외부케이스(24)가 작은 원통형으로 형성되고 외부케이스(24)와 검지봉(18) 사이에는 스프링(22)이 설치되어 스프링(22) 상부에 스프링고정대(25)와 연결 고정된다. 스프링(22)의 하부에는 세정구(26)가 원통형의 검지봉(18) 외부를 감싸고 있는데, 세정구(26)로는 부도체의 가스켓 클리너가 바람직하다. In the present invention, the detection rod 18 and the outer case 24 are formed in a small cylindrical shape in the middle of the circular flange 17, and the spring 22 is installed between the outer case 24 and the detection rod 18. The spring 22 is connected to and fixed to the spring holder 25. In the lower part of the spring 22, the cleaning tool 26 surrounds the outer side of the cylindrical detection rod 18. As the cleaning tool 26, a gasket cleaner of an insulator is preferable.

외부케이스(24) 상부와 플랜지(17)가 결합되어져 있는 검지봉(18)의 상부에 는 대기압이 유입되는 에어밸브(21)가 설치되고 에어라인(28)이, 반대편에는 질소퍼지밸브(23)가 설치된 진공조 복압용 질소라인에 연결된다.On the upper part of the detection rod 18, which is coupled to the upper part of the outer case 24 and the flange 17, an air valve 21 into which atmospheric pressure flows is installed, and an air line 28 is provided, and a nitrogen purge valve 23 is provided on the opposite side. ) Is connected to the vacuum line back pressure nitrogen line installed.

이하, 상기와 구성된 본 발명의 일실시예의 작용을 도 5를 참조하여 설명한다.Hereinafter, the operation of one embodiment of the present invention configured as described above will be described with reference to FIG.

용강의 진공탈가스작업이 실시되면 진공펌프에 의하여 설비내부는 진공상태로 된다(도 1 참조). 진공 탈가스작업시 누수검지기(15) 세정장치는 도 5의 (a)와 같은 상태로 있다가 일정한 시간이 지나면 타이머 등 설비에 의하여 에어밸브(21)가 열리고 도 5의 (b)와 같이 대기압이 유입되면서 세정구(26)가 검지봉(18) 하부로 내려오게 되며 검지봉 하부의 스토퍼(27)에 의하여 멈추게 되는데 이 동작에 의하여 검지봉(18) 표면이 세정구(26)에 의하여 청소된다. 이후 에어밸브(21)가 닫히면 다시 진공상태가 되어 스프링(22)의 자체 당겨지는 힘으로 도 5의 (c)와 같이 상부로 원위치되며 이때 또다시 세정구(26)에 의하여 표면이 왕복 청소된다. 상기와 같은 반복 작업이 이루어져 더스트가 청소되며 상기와 같은 작업의 반복횟수는 에어밸브(21)의 동작으로 얼마든지 조정가능하며 조업시 발생되는 대기유입으로 인한 진공도의 흐름은 잠시 에어밸브(21)가 개폐동작을 실시하기 때문에 영향력이 거의 없다. 기존의 합금철 투입작업 및 진공조 내부의 일부 설비 파손시에도 크게 진공도에 영향을 발생치 않는다. When the vacuum degassing operation of the molten steel is carried out, the inside of the facility is brought into a vacuum state by a vacuum pump (see FIG. 1). In the vacuum degassing operation, the leak detector 15 is kept in the state as shown in FIG. 5 (a). After a certain time, the air valve 21 is opened by a timer or the like, and the atmospheric pressure as shown in FIG. As this flows into the cleaning hole 26 is lowered to the lower detection rod 18 and stopped by the stopper 27 of the lower detection rod, the surface of the detection rod 18 is cleaned by the cleaning hole 26 by this operation. do. Then, when the air valve 21 is closed, it is in a vacuum state, and is returned to the upper portion as shown in FIG. 5C by the force of the spring 22 itself. At this time, the surface is reciprocally cleaned by the cleaning device 26 again. . The dust is cleaned by the repetitive work as described above, and the number of repetitions of the above work is adjustable by the operation of the air valve 21, and the flow of the vacuum degree due to the inflow of air generated during the operation is briefly caused by the air valve 21. There is little influence since the opening and closing operation is performed. Even when the existing ferroalloy operation and some equipment inside the vacuum chamber are damaged, the degree of vacuum is not significantly affected.

이렇게 하여 탈가스작업이 완료되면 설비내부를 대기압으로 바꿔주는 강제 질소복압작업이 실시되는데 도 6에서 보듯이 이때 외부케이스(24) 내부와 연결된 질소퍼지밸브(23)가 질소복압 주라인(5)과 연결되어 있어 복압시 질소가 유입되어 외부케이스(24) 내부와 검지봉(18) 및 스프링(22)의 잔존 더스트를 깨끗하게 불어내어 마무리한다.In this way, when the degassing operation is completed, a forced nitrogen double pressure operation for changing the inside of the facility to atmospheric pressure is performed. As shown in FIG. 6, the nitrogen purge valve 23 connected to the inside of the outer case 24 is connected to the nitrogen double pressure main line 5. Nitrogen is introduced when it is connected to the back pressure so that the remaining dust of the inside of the outer case 24 and the detection rod 18 and the spring 22 is cleanly blown to finish.

검지봉을 둘러싼 세정구의 반복적인 동작으로 검지봉의 문제점인 더스트 부착이 방지되고 검지기 설비를 취외하지 않고 정비할 수 있어 연속적인 탈가스조업이 가능하고 정비발생을 방지하여 정비비 절감 및 생산성 향상에 크게 기여한다.Repetitive operation of the cleaning tool around the detection rod prevents dust attachment, which is a problem of the detection rod, and maintenance without leaving the detector equipment, enabling continuous degassing operation and preventing maintenance, greatly reducing maintenance costs and improving productivity. do.

Claims (3)

가스쿨러(4) 내의 누수를 감지하는 누수검지기(15)에 있어서,In the leak detector 15 for detecting a leak in the gas cooler 4, 누수검지기(15)의 검지봉(18)의 주위를 감싸도록 설치되는 외부케이스(24)와; An outer case 24 installed to surround the detection rod 18 of the leak detector 15; 상기 검지봉(18)과 상기 외부케이스(24)의 사이에서 상기 검지봉(18)을 감싸도록 장착되며 한쪽 끝에 세정구(26)가 부착된 스프링(22)과; A spring 22 mounted between the detection rod 18 and the outer case 24 to surround the detection rod 18 and having a cleaning tool 26 attached to one end thereof; 상기 누수검지기(15)의 플랜지(17)쪽에는 상기 외부케이스(24) 내로 연통되도록 설치되는 에어라인(28) 및 질소퍼지라인(29);An air line 28 and a nitrogen purge line 29 installed at the flange 17 side of the leak detector 15 so as to communicate with the outer case 24; 으로 이루어지는 것을 특징으로 하는 제강공정의 배기덕트에서 진공을 이용한 누수검지기 세정장치.Leak detector cleaning device using a vacuum in the exhaust duct of the steelmaking process, characterized in that consisting of. 청구항 1에 있어서,The method according to claim 1, 상기 검지봉(18)의 한 쪽 끝에 스토퍼(27)가 설치되어 상기 세정구(26)의 이탈을 방지하도록 된 것을 특징으로 하는 제강공정의 배기덕트에서 진공을 이용한 누수검지기 세정장치. A stopper (27) at one end of the detection rod (18) is installed to prevent leakage of the cleaning opening (26), leak detector cleaning device using a vacuum in the exhaust duct of the steelmaking process. 청구항 1 또는 청구항 2에 있어서,The method according to claim 1 or 2, 상기 세정구(26)는 부도체의 가스켓 클리너인 것을 특징으로 하는 제강공정의 배기덕트에서 진공을 이용한 누수검지기 세정장치.The cleaning device (26) is a leak detector cleaning device using a vacuum in the exhaust duct of the steelmaking process, characterized in that the gasket cleaner of the insulator.
KR1020030036330A 2003-06-05 2003-06-05 Device for cleaning water-detecting sensor using vacuum in the exhaust duct in the steel making process KR100965460B1 (en)

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JPH0551064U (en) * 1991-12-17 1993-07-09 株式会社メック Transparent water pipe inner wall cleaning device
JPH09138214A (en) * 1995-11-16 1997-05-27 Mitsubishi Electric Corp Sensor cleaning device
KR19990006235U (en) * 1997-07-25 1999-02-18 김종진 Carbon and tar remover attached to the coke oven door cleaner
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US20120168371A1 (en) * 2011-01-04 2012-07-05 Han-Tang Fu Water filter cartridge and method of manufacturing same

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