High temperature and high pressure corrosion resistant process heat exchanger for a nuclear hydrogen production system
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F28F-019/02
F28F-003/02
출원번호
US-0515361
(2007-10-10)
등록번호
US-8381803
(2013-02-26)
우선권정보
KR-10-2006-0124716 (2006-12-08)
국제출원번호
PCT/KR2007/004939
(2007-10-10)
§371/§102 date
20090518
(20090518)
국제공개번호
WO2008/069426
(2008-06-12)
발명자
/ 주소
Kim, Youngwan
Park, Jaewon
Kim, Minhwan
Hong, Sungdeok
Lee, Wonjae
Chang, Jonghwa
출원인 / 주소
Korea Atomic Energy Research Institute
인용정보
피인용 횟수 :
3인용 특허 :
17
초록▼
A high-temperature and high-pressure corrosion-resistant process heat exchanger for a nuclear hydrogen production system decomposes sulfite (SO3) using heat from a high-temperature gas-cooled reactor to thereby produce sulfide (SO2) and oxygen (O2). The process heat exchanger comprises second and th
A high-temperature and high-pressure corrosion-resistant process heat exchanger for a nuclear hydrogen production system decomposes sulfite (SO3) using heat from a high-temperature gas-cooled reactor to thereby produce sulfide (SO2) and oxygen (O2). The process heat exchanger comprises second and third system coolant channels, each of which is defined by a heat transmission fin, which is bent in a quadrilateral shape, and heat transmission plates, and has increased corrosion resistance thanks to ion-beam coating and ion-beam mixing using a material having high corrosion resistance. The third system coolant channel includes reaction catalysts for SO3 decomposition, and is made of a super alloy. Thus, a system differential pressure between the second and third system coolant channels can be greatly maintained at a high temperature of 900° C. or higher.
대표청구항▼
1. A high-temperature and high-pressure corrosion-resistant process heat exchanger (60) for a nuclear hydrogen production system, comprising: at least one second system coolant channel (63a), on one side of which a second system coolant inlet header (61a), into which a high-temperature second system
1. A high-temperature and high-pressure corrosion-resistant process heat exchanger (60) for a nuclear hydrogen production system, comprising: at least one second system coolant channel (63a), on one side of which a second system coolant inlet header (61a), into which a high-temperature second system coolant (70), heated by heat from the intermediate heat exchanger (50), is introduced, is provided, in an intermediate portion of which an effective heat transmission region (65), receiving heat from the high-temperature second system coolant (70), is formed, on the other side of which a second system coolant outlet header (61b), out of which a low-temperature second system coolant (71) is discharged, is provided, and which is defined by a quadrilateral corrugated heat transmission fin (65a), which is bent at a predetermined width and height and is disposed in a transverse direction, and by heat transmission plates, which are stacked on upper and lower sides of the heat transmission fin (65b); andat least one third system coolant channel (63b), which is located on the upper and/or lower side of the second system coolant channel (63a), on one side of which a third system coolant inlet header (62a), into which a low-temperature third system coolant (80) is introduced, is provided, in an intermediate portion of which an effective heat transmission region (65), transmitting heat to the low-temperature third system coolant (80), is formed, on the other side of which a third system coolant outlet header (62b), out of which a high-temperature third system coolant (81), heated by reaction with reaction catalysts (90) together with the heat from the effective heat transmission region (65), is discharged, is provided, which is defined by a quadrilateral corrugated heat transmission fin (65a), which is bent at a predetermined width and height and is disposed in a transverse direction, and by heat transmission plates stacked on upper and lower sides of the heat transmission fin (65b), and which includes the reaction catalysts (90) in grooves of the corrugated heat transmission fin (65a),wherein the heat transmission fins (65a) and the heat transmission plates (65b) of the second and third system coolant channels (63a and 63b) are made of a super alloy; andin the third system coolant channel (63b), surfaces of the heat transmission fin (65a) and the heat transmission plate (65b), which come into contact with sulfuric acid (H2SO4) and/or sulfite (SO3), are subjected to ion-beam coating and ion-beam mixing using a material having high corrosion resistance. 2. The process heat exchanger according to claim 1, wherein the material having high corrosion resistance comprises SiC. 3. The process heat exchanger according to claim 1, wherein the heat transmission fin (65a) is bent in a trapezoidal shape. 4. The process heat exchanger according to claim 3, wherein the heat transmission fin (65a) has a horizontal pitch (H) ranging from 3 mm to 8 mm. 5. The process heat exchanger according to claim 3, wherein the heat transmission fin (65a) has a vertical pitch (V) ranging from 3 mm to 8 mm. 6. The process heat exchanger according to claim 1, wherein surfaces of the heat transmission fin (65a) and the heat transmission plate (65b) that come into contact with the high-temperature second system coolant (70), introduced from the second system coolant channel (63a), are subjected to ion-beam coating and ion-beam mixing using a material having high corrosion resistance. 7. A high-temperature and high-pressure corrosion-resistant process heat exchanger for a nuclear hydrogen production system (1), in which the nuclear hydrogen production system (1) has a first system loop (10) transmitting heat produced from a core (41) of a nuclear reactor (40) to an intermediate heat exchanger (50), a second system loop (20) forcing a second system coolant (70) to be transferred to a process heat exchanger (60) by a second system coolant circulator (23), and a third system loop (30) producing hydrogen using heat transferred from the intermediate heat exchanger (50) to the process heat exchanger (60), the process heat exchanger (60) comprising: at least one second system coolant channel (63a′), on one side of which a second system coolant inlet header (61a), into which the high-temperature second system coolant (70) heated by the heat from the intermediate heat exchanger (50) is introduced, is provided, in an intermediate portion of which an effective heat transmission region (65), receiving heat from the high-temperature second system coolant (70), is formed, on another side of which a second system coolant outlet header (61b), out of which a low-temperature second system coolant (71) is discharged, is provided, and which is defined by at least one curved channel having a semicircle or semi-ellipse with a predetermined radius (67) in a top surface of a plano-concave heat transmission plate (65b′); andat least one third system coolant channel (63b), which is located on the upper and/or lower side of the second system coolant channel (63a′), on one side of which a third system coolant inlet header (62a), into which a low-temperature third system coolant (80) is introduced, is provided, in an intermediate portion of which an effective heat transmission region (65), transmitting heat to the low-temperature third system coolant (80), is formed, on another side of which a third system coolant outlet header (62b), out of which a high-temperature third system coolant (81) heated by reaction with reaction catalysts (90) together with heat from the effective heat transmission region (65) is discharged, is provided, which is defined by a quadrilateral corrugated heat transmission fin (65a), which is bent at a predetermined width and height and is disposed between the heat transmission plate (65b′) and a flat heat transmission plate (65b) in a transverse direction, and which includes the reaction catalysts (90) in grooves of the corrugated heat transmission fin (65a),wherein the heat transmission fins (65a) and the heat transmission plates (65b and 65b′) of the second and third system coolant channels (63a and 63b) are made of a super alloy; andin the third system coolant channel (63b), surfaces of the heat transmission fin (65a) and the heat transmission plate (65b) that come into contact with sulfuric acid (H2SO4) and/or sulfite (SO3) are subjected to ion-beam coating and ion-beam mixing using a material having high corrosion resistance. 8. The process heat exchanger according to claim 7, wherein the radius (67) of the second system coolant channel (63a) has a range from 0.05 mm to 2.5 mm. 9. The process heat exchanger according to claim 7, wherein the heat transmission fin (65a) has a vertical pitch V ranging from 3 mm to 8 mm. 10. The process heat exchanger according to claim 7, wherein a surface of the heat transmission plate (65b′) that comes into contact with the high-temperature second system coolant (70), introduced from the second system coolant channel (63a′), is subjected to ion-beam coating and ion-beam mixing using a material having high corrosion resistance. 11. The process heat exchanger according to claim 7, wherein the material having high corrosion resistance comprises SiC. 12. The process heat exchanger according to claim 7, wherein the heat transmission fin (65a) is bent in a trapezoidal shape. 13. The process heat exchanger according to claim 12, wherein the heat transmission fin (65a) has a horizontal pitch (H) ranging from 3 mm to 8 mm. 14. The process heat exchanger according to claim 12, wherein the heat transmission fin (65a) has a vertical pitch (V) ranging from 3 mm to 8 mm.
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