CN112403209B - Corrugated plate steam-water separation element - Google Patents
Corrugated plate steam-water separation element Download PDFInfo
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- CN112403209B CN112403209B CN201910768675.3A CN201910768675A CN112403209B CN 112403209 B CN112403209 B CN 112403209B CN 201910768675 A CN201910768675 A CN 201910768675A CN 112403209 B CN112403209 B CN 112403209B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 238000000926 separation method Methods 0.000 title claims abstract description 31
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 54
- 239000007788 liquid Substances 0.000 claims abstract description 31
- 238000005452 bending Methods 0.000 claims description 51
- 230000002940 repellent Effects 0.000 claims description 21
- 239000005871 repellent Substances 0.000 claims description 21
- 238000003466 welding Methods 0.000 claims description 19
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- 238000007791 dehumidification Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
- B01D45/08—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Separating Particles In Gases By Inertia (AREA)
Abstract
The invention relates to the technical field of steam dehumidification, and particularly discloses a corrugated plate steam-water separation element. The element comprises a main wave plate and a plurality of hook plates, wherein the main wave plate is a flat plate structure with two ends protruding up and down in the same plane and in the middle to form a plurality of inflection angles, and a windward surface and a leeward surface of the inflection angle are correspondingly formed on two sides of any one inflection angle according to the steam incoming flow direction; a hook plate is fixedly arranged on the lee surface of each inflection angle, so that a hydrophobic cavity is formed by the front hook plate and the rear hook plate which are positioned on the same side of the main wave plate and the main wave plate; the hydrophobic cavity comprises at least one closed hydrophobic cavity; the closed hydrophobic cavity is formed by staggering and overlapping the end parts of two adjacent hook plates positioned on the same side, and the overlapping opening direction is opposite to the steam inflow direction. The element can improve the critical speed of allowing steam to flow through the separator, effectively protect the liquid film and reduce the generation of secondary liquid drops.
Description
Technical Field
The invention belongs to the technical field of steam dehumidification, and particularly relates to a corrugated plate steam-water separation element.
Background
The corrugated plate is a steam-water separation core element of wet steam, is arranged in a combined manner in a separation section of a conventional island steam-water separation reheater (MSR) of a nuclear power station or a dryer of a pressurized water reactor steam generator, can be used for carrying out fine separation dehumidification on steam, prevents high-humidity steam from damaging water erosion of a steam turbine and preventing safety accidents, and meanwhile, the smaller the outlet humidity of the MSR separation section is, the less steam extraction is needed in a reheating section, so that the unit efficiency can be improved. The wave plate structure (patent publication No. CN204619699U, publication date 2015.09.09) for the dryer of the existing pressurized water reactor steam generator, wherein, 1 water retaining hook 2 is connected on the inner and outer surfaces of 6 wave crests and 6 wave troughs of the wave plate 1 by resistance welding, and 1 tail water retaining hook 3 formed by integral processing is also arranged at the tail end. The air flow carries fine liquid drops to move in the tortuous channels formed by the corrugated plates which are arranged in parallel, and the liquid drops can not impact the wall surfaces of the corrugated plates along with the movement of the gas in the tortuous channels due to the large inertia force of the liquid drops, the liquid drops are attached to the wall surfaces, and the liquid films continuously flow downwards by self weight and are discharged. An important property of the corrugated plate is the "critical velocity" that allows the vapor to flow through the separator, i.e., the vapor velocity of the secondary droplets created by the gas stream tearing the water film. The opening of the hydrophobic hook of the existing corrugated plate forms obvious vortex, and the liquid film is easily torn by the main air flow to generate secondary liquid drops, and is reeled into the main flow channel; meanwhile, the hydrophobic hooks are protruded to the corners of the corrugated plate flow channels to generate periodic local high flow velocity, so that a liquid film at the wave crest of the corrugated plate is very easy to tear, and the separation efficiency is drastically reduced.
Disclosure of Invention
The invention aims to provide a wave-shaped plate steam-water separation element which can improve the critical speed of allowing steam to flow through a separator, effectively protect a liquid film and reduce the generation of secondary liquid drops.
The technical scheme of the invention is as follows: the wave-shaped plate steam-water separation element comprises a main wave plate and a plurality of hook plates, wherein the main wave plate is of a flat plate structure with two ends protruding up and down on the same plane and in the middle to form a plurality of inflection angles, and a windward side and a leeward side of each inflection angle are correspondingly formed on two sides of each inflection angle according to the incoming flow direction of steam; a hook plate is fixedly arranged on the lee surface of each inflection angle, so that a hydrophobic cavity is formed by the front hook plate and the rear hook plate which are positioned on the same side of the main wave plate and the main wave plate; the hydrophobic cavity comprises at least one closed hydrophobic cavity; the closed hydrophobic cavity is formed by staggering and overlapping the end parts of two adjacent hook plates positioned on the same side, and the overlapping opening direction is opposite to the steam inflow direction.
The drainage cavity further comprises an open drainage cavity and a semi-open drainage cavity, wherein the open drainage cavity is positioned at the front end of the incoming flow of the main wave plate and is formed by enclosing the end part of the hook plate and the windward side of the bending angle; the semi-open type water repellent cavity is formed by enclosing a hook plate which is positioned at the front end and the rear end of the same side of the main wave plate and the windward side of the corresponding inflection angle on the main wave plate.
The main wave plate comprises an inlet straight section and an outlet straight section, the left end and the right end of which are on the same plane, and the main wave plate is folded up and down for 7 times between the inlet straight section and the outlet straight section to form 7 bending angles in a conformal way; the folding lines of any bending angle are mutually parallel in the vertical direction, and a leeward face and a windward face are formed on the folding plates at the two sides of each bending angle; the 9 hook plates are arranged in parallel on the lee surfaces of the 7 bending angles, and the lee surfaces of the inlet straight section and the outlet straight section.
The hook plate comprises 1 type of hook plate, 3 types of hook plates, 2 types of hook plates, 1 type of four types of hook plates, 1 type of five types of hook plates and 1 tail hook sub-plate, wherein 3 types of hook plates are fixedly installed on three leeward surfaces close to a first bending angle, a second bending angle and a third bending angle of an inlet straight section respectively, and the part of the left side of the first type of hook plate, which exceeds the first bending angle, and the main wave plate form an open type water repellent cavity; the right side of the first type hook plate and the third type hook plate are overlapped in a staggered way to form a closed hydrophobic cavity; the left side of the second type of hook plate is staggered and overlapped with the left side of the first type of hook plate arranged on the leeward surface of the straight section of the outlet to form a closed water repellent cavity; 2 three types of hook plates are fixedly arranged on the lee surfaces of the fourth bending angle and the fifth bending angle, wherein the left side end parts of the first three types of hook plates and the second three types of hook plates are respectively staggered and overlapped with the right side end parts of the second type of hook plates and the third type of hook plates to form a closed water repellent cavity; four types of hook plates and five types of hook plates are respectively fixed on lee surfaces of the sixth bending angle and the seventh bending angle, and the left side end parts of the four types of hook plates and the five types of hook plates are respectively opposite to the right side end parts of the first three types of hook plates and the second three types of hook plates in the same plane at intervals to form 2 first half-open type water repellent cavities; the tail hook plate is fixedly arranged on the leeward surface of the straight section of the outlet, and the left end of the tail hook plate is bent and is spaced from the right end parts of the five types of hook plates to form a second semi-open type hydrophobic cavity.
Distance blocks are arranged at two end parts of the main wave plates, and any two main wave plates are fixed through the distance blocks and keep parallel to each other and the same distance.
The distance block is a folded plate structure with a cross section in a shape like a Chinese character 'ji', straight sections on the left side and the right side of the distance block are fixedly connected with two end parts of the main plates through resistance welding, a convex section in the middle of the distance block is fixed with the other main plate, and the fixed positioning of the two main plates is realized.
The gap of the closed type hydrophobic cavity is 1.5-3 mm; the front and rear hook plates of the closed hydrophobic cavity are overlapped in a staggered way to form a liquid drop inlet gap, the staggered width of the liquid drop inlet gap is 0-3 mm, and the staggered gap width is 0.8-2 mm.
The thickness of the hook plate is 0.8-1.2 mm; the welding spots of the hook plate and the main wave plate (8) which are welded by the lee surface resistance are uniformly spaced at 100-150 mm in the height direction, and 1-2 welding spots are uniformly distributed in the horizontal direction.
The gap between the open hydrophobic cavity and the semi-open hydrophobic cavity is 1-4 mm.
The thickness of the main wave plate is 1-1.5 mm, and the bending angle on the main wave plate is 110-120 degrees; the main wave plate has the height of 500-1500 mm and is made of 308, 316 or 321 stainless steel; the distance between the two corrugated plates is 16-22 mm.
The invention has the remarkable effects that: compared with the prior art, the wave-shaped plate steam-water separation element has the following advantages:
(1) The slightly larger hydrophobic cavity gap formed by the corrugated plate and the hook plate at the front end along the airflow direction can fully collect most of moisture of the dredged steam, and is suitable for higher inlet humidity;
(2) The closed hydrophobic cavity formed by the hook plate and the corrugated plate effectively protects the liquid film attached in the hydrophobic cavity, prevents the liquid film from being sucked again by the air flow to generate secondary liquid drops to enter the main air flow, and deteriorates the separation performance.
(3) The probability of capturing the adhesion of the liquid drops is improved through the increased adhesion area of the plate wall forming the closed hydrophobic cavity, and the smaller hydrophobic cavity clearance is suitable for the collection of smaller water quantity at the rear end, so that the separation efficiency is higher, the characteristics of large steam humidity and small liquid drop granularity of the inlet steam of the steam-water separation reheater are met, and the dryness of the wet steam after separation is not less than 99%.
(4) The small-diameter liquid drops are collected through an inlet gap formed by overlapping front and rear hook plates of the closed hydrophobic cavity on the windward side.
(5) By reducing the gap between the wave-shaped plate and the hydrophobic cavity of the hook plate at the rear end along the air flow direction, the width of the main air flow channel is increased, and the air flow speed and pressure drop are reduced.
Drawings
FIG. 1 is a schematic diagram of a corrugated plate steam-water separation element according to the present invention;
FIG. 2 is a side view of a corrugated plate steam-water separation element structure according to the present invention;
FIG. 3 is a schematic view of a main plate structure in a corrugated plate steam-water separation element according to the present invention;
FIG. 4 is a schematic view of a hydrophobic cavity formed by a main plate and a hook plate in a corrugated plate steam-water separation element according to the present invention;
FIG. 5 is a schematic view of the trend of air flow when the corrugated plate steam-water separation elements are arranged in parallel according to the invention;
FIG. 6 is a schematic front view of the distance block of FIG. 1;
In the figure: 4. distance blocks; 5. a class of hook plates; 6. a second type hook plate; 7. three types of hook plates; 8. a main wave plate; 9. four types of hook plates; 10. five types of hook plates; 11. a tail hook plate; 12. an inlet straight section; 13. a lee surface; 14. a windward side; 15. a inflection angle; 16. an outlet straight section; 17. an open hydrophobic cavity; 18. a closed hydrophobic cavity; 19. a first semi-open hydrophobic cavity; 20. a second semi-open hydrophobic cavity.
Detailed Description
The invention will be described in further detail with reference to the accompanying drawings and specific examples.
Example 1
As shown in fig. 1 to 6, a wave-shaped plate steam-water separation element comprises a main wave plate 8 and 9 hook plates, wherein the main wave plate 8 is of a flat plate structure with a plurality of inflection angles 15, for example, the main wave plate 8 comprises an inlet straight section 12 and an outlet straight section 16 with left and right ends on the same plane, and forms up-down folding between the inlet straight section 12 and the outlet straight section 16 to form 7 inflection angles 15 in a conformal manner, any two inflection angles 15 are parallel to each other in the vertical direction, and each inflection angle is 110 °; steam flows from the inlet straight section 12 to the outlet straight section 16, and a leeward surface 13 and a windward surface 14 are formed on two side folded plates of each bent angle 15, wherein 9 hook plates are parallelly arranged on the leeward surface 13 of each bent angle 15 and the leeward surfaces of the inlet straight section 12 and the outlet straight section 16, each hook plate is in resistance welding with the leeward surface of the main wave plate 8, the uniform distance between the resistance welding points in the height direction is 100mm, and the horizontal direction is 1 welding point; The hook plates comprise 5 types of hook plates, specifically 1 one type of hook plate 5, 3 types of hook plates 6,2 three types of hook plates 7, 1 four types of hook plates 9, 1 five types of hook plates 10 and 1 tail hook plate 11; 3 kinds of hook plates 6 are respectively and fixedly arranged on three lee surfaces close to the first bending angle, the second bending angle and the third bending angle of the inlet straight section 12, wherein the part of the left side of the first kind of hook plate, which exceeds the first bending angle, and the main wave plate 8 form an open type water repellent cavity 17, and the gap of the open type water repellent cavity 17 is 1mm; the right side of the first type hook plate and the third type hook plate are overlapped in a staggered way to form a closed hydrophobic cavity 18, and a liquid drop inlet gap is formed at the overlapped end part, wherein the staggered width is 0mm, and the staggered gap width is 0.8mm; The left side of the second type of hook plate is overlapped with the left side of the first type of hook plate 5 arranged on the leeward surface of the outlet straight section 16 in a staggered way to form a closed hydrophobic cavity 18, and a liquid drop inlet gap is formed at the overlapped end part, wherein the staggered width is 1mm, and the staggered gap width is 1mm; 2 three types of hook plates 7 are fixedly arranged on lee surfaces of the fourth bending angle and the fifth bending angle, wherein the left side end parts of the first three types of hook plates and the second three types of hook plates are respectively overlapped with the right side end parts of the second type of hook plates and the third type of hook plates in a staggered way to form a closed hydrophobic cavity 18, and a liquid drop inlet gap is formed at the overlapped end parts, wherein the staggered width is 3mm, and the staggered gap width is 2mm; Four types of hook plates 9 and five types of hook plates 10 are respectively fixed on lee surfaces of the sixth bending angle and the seventh bending angle, and the left side end parts of the four types of hook plates 9 and the five types of hook plates 10 are respectively opposite to the right side end parts of the first three types of hook plates and the second three types of hook plates in the same plane at intervals to form 2 first half-open type hydrophobic cavities 19, wherein the gap of the first half-open type hydrophobic cavities 19 is 2mm; the tail hook plate 11 is fixedly arranged on the leeward side of the straight outlet section 16, the left end of the tail hook plate 11 is bent and is spaced from the right end parts of the five types of hook plates 10, and a second semi-open type water repellent cavity 20 is formed, wherein the gap of the second semi-open type water repellent cavity is 1mm; the distance blocks 4 are of a folded plate structure with a cross section in a shape like a Chinese character 'ji', straight sections 21 on the left side and the right side of the distance blocks are welded on an inlet straight section 12 or an outlet straight section 16 of the main wave plate 8 through resistance welding, a plurality of distance blocks 4 are fixed on two sides of the main wave plate 8, so that the two main wave plates 8 are parallel through the distance blocks 4 and keep the same distance, wherein the plate distance between the two main wave plates 8 is 16mm; the main wave plate and the hook plate are pressed and formed through an upper die and a lower die, and the main wave plate can be made of 308, 316 or 321 stainless steel; the height of the whole wave-shaped plate steam-water separation element is 500mm.
Example 2
As shown in fig. 1 to 6, a wave-shaped plate steam-water separation element comprises a main wave plate 8 and 9 hook plates, wherein the main wave plate 8 is of a flat plate structure with a plurality of inflection angles 15, for example, the main wave plate 8 comprises an inlet straight section 12 and an outlet straight section 16 with left and right ends on the same plane, and forms up-down folding between the inlet straight section 12 and the outlet straight section 16 to form 7 inflection angles 15 in a conformal manner, any two inflection angles 15 are parallel to each other in the vertical direction, and each inflection angle is 120 °; steam flows from the inlet straight section 12 to the outlet straight section 16, and a leeward surface 13 and a windward surface 14 are formed on two side folded plates of each bent angle 15, wherein 9 hook plates are parallelly arranged on the leeward surface 13 of each bent angle 15 and the leeward surfaces of the inlet straight section 12 and the outlet straight section 16, each hook plate is in resistance welding with the leeward surface of the main wave plate 8, the uniform distance between the resistance welding points in the height direction is 150mm, and the horizontal direction is 2 welding points; The hook plates comprise 5 types of hook plates, and specifically comprise 1 type of hook plate 5, 3 types of hook plates 6, 2 types of three hook plates 7, 1 type of four hook plates 9, 1 type of five hook plates and 1 tail hook sub-plate; 3 kinds of hook plates 6 are respectively and fixedly arranged on three lee surfaces close to the first bending angle, the second bending angle and the third bending angle of the inlet straight section 12, wherein the part of the left side of the first kind of hook plate, which exceeds the first bending angle, and the main wave plate 8 form an open type water repellent cavity 17, and the gap of the open type water repellent cavity 17 is 4mm; the right side of the first type hook plate and the third type hook plate are overlapped in a staggered way to form a closed hydrophobic cavity 18, and a liquid drop inlet gap is formed at the overlapped end part, wherein the staggered width is 3mm, and the staggered gap width is 1.2mm; The left side of the second type of hook plate is overlapped with the left side of the first type of hook plate 5 arranged on the leeward surface of the outlet straight section 16 in a staggered way to form a closed hydrophobic cavity 18, and a liquid drop inlet gap is formed at the overlapped end part, wherein the staggered width is 2mm, and the staggered gap width is 1.3mm; 2 three types of hook plates 7 are fixedly arranged on lee surfaces of the fourth bending angle and the fifth bending angle, wherein the left side end parts of the first three types of hook plates and the second three types of hook plates are respectively overlapped with the right side end parts of the second type of hook plates and the third type of hook plates in a staggered way to form a closed hydrophobic cavity 18, and a liquid drop inlet gap is formed at the overlapped end parts, wherein the staggered width is 3mm, and the staggered gap width is 2mm; Four types of hook plates 9 and five types of hook plates 10 are respectively fixed on lee surfaces of the sixth bending angle and the seventh bending angle, and the left side end parts of the four types of hook plates 9 and the five types of hook plates 10 are respectively opposite to the right side end parts of the first three types of hook plates and the second three types of hook plates in the same plane at intervals to form 2 first half-open type hydrophobic cavities 19, wherein the gap of the first half-open type hydrophobic cavities 19 is 1mm; the tail hook plate 11 is fixedly arranged on the leeward side of the straight outlet section 16, the left end of the tail hook plate 11 is bent and is spaced from the right end parts of the five types of hook plates 10, and a second semi-open type water repellent cavity 20 is formed, wherein the gap of the second semi-open type water repellent cavity is 4mm; The distance blocks 4 are of a folded plate structure with a cross section in a shape like a Chinese character 'ji', straight sections 21 on the left side and the right side of the distance blocks are welded on an inlet straight section 12 or an outlet straight section 16 of the main wave plate 8 through resistance welding, a plurality of distance blocks 4 are fixed on two sides of the main wave plate 8, so that the two main wave plates 8 are parallel through the distance blocks 4 and keep the same distance, wherein the plate distance between the two main wave plates 8 is 22mm; the main wave plate and the hook plate are pressed and formed through an upper die and a lower die, and the main wave plate can be made of 308, 316 or 321 stainless steel; the height of the whole wave-shaped plate steam-water separation element is 1500mm.
Example 3
As shown in fig. 1 to 6, a wave-shaped plate steam-water separation element comprises a main wave plate 8 and 9 hook plates, wherein the main wave plate 8 is of a flat plate structure with a plurality of inflection angles 15, for example, the main wave plate 8 comprises an inlet straight section 12 and an outlet straight section 16 with left and right ends on the same plane, and forms up-down folding between the inlet straight section 12 and the outlet straight section 16 to form 7 inflection angles 15 in a conformal manner, any two inflection angles 15 are parallel to each other in the vertical direction, and each inflection angle is 115 °; steam flows from the inlet straight section 12 to the outlet straight section 16, and a leeward surface 13 and a windward surface 14 are formed on two side folded plates of each bent angle 15, wherein 9 hook plates are parallelly arranged on the leeward surface 13 of each bent angle 15 and the leeward surfaces of the inlet straight section 12 and the outlet straight section 16, each hook plate is in resistance welding with the leeward surface of the main wave plate 8, the uniform distance between the resistance welding points in the height direction is 120mm, and the horizontal direction is 2 welding points; The hook plates comprise 5 types of hook plates, and specifically comprise 1 type of hook plate 5, 3 types of hook plates 6, 2 types of three hook plates 7, 1 type of four hook plates 9, 1 type of five hook plates and 1 tail hook sub-plate; 3 kinds of hook plates 6 are respectively and fixedly arranged on three lee surfaces close to the first bending angle, the second bending angle and the third bending angle of the inlet straight section 12, wherein the part of the left side of the first kind of hook plate, which exceeds the first bending angle, and the main wave plate 8 form an open type water repellent cavity 17, and the gap of the open type water repellent cavity 17 is 2mm; the right side of the first type hook plate and the third type hook plate are overlapped in a staggered way to form a closed hydrophobic cavity 18, and a liquid drop inlet gap is formed at the overlapped end part, wherein the staggered width is 2mm, and the staggered gap width is 2mm; The left side of the second type of hook plate is overlapped with the left side of the first type of hook plate 5 arranged on the leeward surface of the outlet straight section 16 in a staggered way to form a closed hydrophobic cavity 18, and a liquid drop inlet gap is formed at the overlapped end part, wherein the staggered width is 2mm, and the staggered gap width is 2mm; 2 three types of hook plates 7 are fixedly arranged on lee surfaces of the fourth bending angle and the fifth bending angle, wherein the left side end parts of the first three types of hook plates and the second three types of hook plates are respectively overlapped with the right side end parts of the second type of hook plates and the third type of hook plates in a staggered way to form a closed hydrophobic cavity 18, and a liquid drop inlet gap is formed at the overlapped end parts, wherein the staggered width is 3mm, and the staggered gap width is 2mm; Four types of hook plates 9 and five types of hook plates 10 are respectively fixed on lee surfaces of the sixth bending angle and the seventh bending angle, and the left side end parts of the four types of hook plates 9 and the five types of hook plates 10 are respectively opposite to the right side end parts of the first three types of hook plates and the second three types of hook plates in the same plane at intervals to form 2 first half-open type hydrophobic cavities 19, wherein the gap of the first half-open type hydrophobic cavities 19 is 4mm; the tail hook plate 11 is fixedly arranged on the leeward side of the straight outlet section 16, the left end of the tail hook plate 11 is bent and is spaced from the right end parts of the five types of hook plates 10, and a second semi-open type water repellent cavity 20 is formed, wherein the gap of the second semi-open type water repellent cavity is 3mm; The distance blocks 4 are of a folded plate structure with a cross section in a shape like a Chinese character 'ji', straight sections 21 on the left side and the right side of the distance blocks are welded on an inlet straight section 12 or an outlet straight section 16 of the main wave plate 8 through resistance welding, a plurality of distance blocks 4 are fixed on two sides of the main wave plate 8, so that the two main wave plates 8 are parallel through the distance blocks 4 and keep the same distance, wherein the plate distance between the two main wave plates 8 is 20mm; the main wave plate and the hook plate are pressed and formed through an upper die and a lower die, and the main wave plate can be made of 308, 316 or 321 stainless steel; the height of the whole corrugated plate steam-water separation element is 1000mm.
Claims (8)
1. A wave plate steam-water separation element, characterized in that: the element comprises a main wave plate (8) and a plurality of hook plates, wherein the main wave plate (8) is of a flat plate structure with two ends on the same plane and a plurality of bending angles (15) formed by up-down protrusions in the middle, and a windward side and a leeward side of any bending angle (15) are correspondingly formed on two sides of the bending angle (15) according to the incoming steam flow direction; a hook plate is fixedly arranged on the lee surface of each inflection angle (15), so that a hydrophobic cavity is formed by the front hook plate and the rear hook plate which are positioned on the same side of the main wave plate (8) and the main wave plate; the hydrophobic cavity comprises at least one closed hydrophobic cavity; the closed type water repellent cavity is formed by staggering and overlapping the end parts of two adjacent hook plates positioned on the same side, and the overlapping opening direction is opposite to the steam inflow direction; the drainage cavity further comprises an open drainage cavity and a semi-open drainage cavity, wherein the open drainage cavity is positioned at the front end of the incoming flow of the main wave plate (8) and is formed by enclosing the end of the hook plate and the windward side of the bending angle (15); the semi-open type water repellent cavity is formed by enclosing a hook plate which is positioned at the front end and the rear end of the same side of the main wave plate (8) and the windward side of a corresponding bending angle (8) on the main wave plate (8); the main wave plate (8) comprises an inlet straight section (12) and an outlet straight section (16) with the left end and the right end on the same plane, and is folded up and down for 7 times between the inlet straight section (12) and the outlet straight section (16), so that 7 inflection angles (15) are formed in a conformal manner; the folding lines of any bending angle (15) are mutually parallel in the vertical direction, and a leeward surface (13) and a windward surface (14) are formed on folded plates at two sides of each bending angle (15); the 9 hook plates are arranged in parallel on the leeward surface (13) of the 7 bending angles (15), and the leeward surfaces of the inlet straight section (12) and the outlet straight section (16).
2. The corrugated plate steam-water separation element of claim 1, wherein: the hook plate comprises 1 type of hook plate (5), 3 types of hook plates (6), 2 types of three hook plates (7), 1 type of four hook plates (9), 1 type of five hook plates (10) and 1 tail hook sub-plate (11), wherein 3 types of hook plates (6) are respectively and fixedly arranged on three leeward surfaces close to a first inflection angle, a second inflection angle and a third inflection angle of an inlet straight section (12), and the part of the left side of the first type of hook plate, which exceeds the first inflection angle, and a main wave plate (8) form an open type hydrophobic cavity (17); the right side of the first type hook plate and the third type hook plate are overlapped in a staggered way to form a closed hydrophobic cavity (18); the left side of the second type of hook plate is staggered and overlapped with the left side of the first type of hook plate (5) arranged on the lee surface of the straight outlet section (16) to form a closed hydrophobic cavity (18); 2 three types of hook plates (7) are fixedly arranged on lee surfaces of the fourth bending angle and the fifth bending angle, wherein the left side end parts of the first three types of hook plates and the second three types of hook plates are respectively staggered and overlapped with the right side end parts of the second type of hook plates and the third type of hook plates to form a closed water repellent cavity; four types of hook plates (9) and five types of hook plates (10) are respectively fixed on lee surfaces of the sixth bending angle and the seventh bending angle, and the left side ends of the four types of hook plates (9) and the five types of hook plates (10) are respectively opposite to the right side ends of the first three types of hook plates and the second three types of hook plates in the same plane at intervals to form 2 first half-open type hydrophobic cavities (19); the tail hook plate (11) is fixedly arranged on the leeward surface of the straight outlet section (16), the left end of the tail hook plate (11) is bent and is spaced from the right end parts of the five types of hook plates (10), and a second semi-open type water repellent cavity (20) is formed.
3. The corrugated plate steam-water separation element of claim 1, wherein: distance blocks (4) are arranged at two end parts of the main wave plates (8), and any two main wave plates (8) are fixed through the distance blocks (4) and keep the same distance in parallel.
4. A wave plate steam-water separator element according to claim 3, wherein: the distance block (4) is of a folded plate structure with a cross section in a shape like a Chinese character 'ji', straight sections (21) on the left side and the right side of the distance block are fixedly connected with two ends of the main wave plate (8) through resistance welding, a middle protruding section of the distance block (4) is fixed with the other main wave plate, and fixed positioning of the two main wave plates is achieved.
5. A corrugated plate steam-water separator element according to claim 1 or 2, wherein: the gap of the closed type hydrophobic cavity is 1.5-3 mm; the front hook plate and the rear hook plate which form the closed hydrophobic cavity are overlapped in a staggered mode to form a liquid drop inlet gap, the staggered width of the liquid drop inlet gap is 0-3 mm, and the staggered gap width is 0.8-2 mm.
6. A corrugated plate steam-water separator element according to claim 1 or 2, wherein: the thickness of the hook plate is 0.8-1.2 mm; the welding spots of the hook plate and the main wave plate (8) which are welded by the lee surface resistance are uniformly spaced at 100-150 mm in the height direction, and 1-2 welding spots are uniformly distributed in the horizontal direction.
7. A corrugated plate steam-water separator element according to claim 1 or 2, wherein: the gap between the open hydrophobic cavity and the semi-open hydrophobic cavity is 1-4 mm.
8. A corrugated plate steam-water separator element according to claim 1 or 2, wherein: the thickness of the main wave plate (8) is 1-1.5 mm, and the bending angle (15) on the main wave plate (8) is 110-120 degrees; the main wave plate (8) is 500-1500 mm in height and is made of 308, 316 or 321 stainless steel; the distance between the two corrugated plates (8) is 16-22 mm.
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| CN211302598U (en) * | 2019-08-20 | 2020-08-21 | 核动力运行研究所 | Corrugated plate steam-water separation element |
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| JP2000153118A (en) * | 1998-11-24 | 2000-06-06 | Hitachi Ltd | Gas-water separation system |
| JP2002126429A (en) * | 2000-10-20 | 2002-05-08 | Mitsubishi Heavy Ind Ltd | Moisture separator |
| CN100333822C (en) * | 2004-11-24 | 2007-08-29 | 核动力运行研究所 | Drier |
| CN202036873U (en) * | 2011-03-15 | 2011-11-16 | 杭州锅炉集团股份有限公司 | Steam-water separator |
| CN104324556B (en) * | 2013-07-22 | 2016-08-31 | 中国核动力研究设计院 | Waveform steam-water separation plate in a kind of nuclear power station steam generator and drier |
| CN109973985A (en) * | 2017-12-27 | 2019-07-05 | 核动力运行研究所 | A kind of chevron with hooks drier |
| CN109893914A (en) * | 2019-02-12 | 2019-06-18 | 中广核工程有限公司 | A kind of pouch-type corrugated sheet drier for pressurized water reactor nuclear power station steam generator |
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