CN211552546U - Plate heat exchanger core for nuclear power system - Google Patents
Plate heat exchanger core for nuclear power system Download PDFInfo
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- CN211552546U CN211552546U CN201921381342.7U CN201921381342U CN211552546U CN 211552546 U CN211552546 U CN 211552546U CN 201921381342 U CN201921381342 U CN 201921381342U CN 211552546 U CN211552546 U CN 211552546U
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Abstract
The utility model discloses a plate heat exchanger core for a nuclear power system, which comprises a plurality of groups of plate pairs consisting of plate sheets, wherein the plate sheets are of concave-convex ripple unit topological structures which are arranged in a hexagonal or regular quadrilateral honeycomb manner, and ripple units on each plate sheet comprise convex ripples and concave ripples which are arranged in a staggered manner; two sheets forming a group of plate pairs are buckled with each other, the outer walls of the abutted concave corrugations are welded and sealed, and the outer walls of the convex corrugations in the two sheets form a cold medium side flow channel; two groups of adjacent plates which are mutually overlapped are welded and sealed on the outer wall of the convex corrugation which is mutually abutted, and the two groups of plates form a molten salt side flow channel on the outer wall of the concave corrugation; the fused salt side flow channel and the cold medium side flow channel are vertical to each other without a junction; the sides of the plate pairs are welded and sealed by connecting plates. The honeycomb structure enables the whole plate high-temperature fused salt to be uniformly cooled, so that the plate completes heat exchange work at a bearable temperature, and the fused salt can be smoothly circulated.
Description
Technical Field
The utility model relates to a indirect heating equipment technical field, specific plate heat exchanger core is used to nuclear power system that says so.
Background
The molten salt reactor nuclear energy system is the only liquid fuel reactor in the candidate reactor of the fourth-generation advanced nuclear energy system, is considered as an ideal reactor type for thorium resource utilization, and has the characteristics of high inherent safety, less nuclear waste, better diffusion resistance and economy and the like compared with the traditional nuclear energy material. The molten salt reactor is one of nuclear fission reactors, and the main coolant is a molten mixed salt which can keep low vapor pressure when working at high temperature, thereby reducing mechanical stress and improving the safety of equipment. The molten salt reactor uses high-temperature molten salt as a coolant, has the thermal property of high temperature, low pressure, high chemical stability, high heat capacity and the like, does not need to use a heavy and expensive pressure vessel, and is suitable for building a compact, light and low-cost small modular reactor. In addition, the molten salt reactor adopts a waterless cooling technology, can operate only by a small amount of water, and can realize high-efficiency power generation in arid regions.
The operating temperature of the high-temperature molten salt of the molten salt reactor is above 700 ℃, which is equivalent to that the pressure difference of media at two sides of cold and hot sides in the heat exchange equipment reaches 10MPa under the normal temperature state, the pressure bearing capacity of the heat exchange core body is required to be high, and the pressure bearing capacity of the core body of the common plate type heat exchanger is generally below 6 MPa; although the pressure difference which can be borne by a heat exchanger core of the microchannel heat exchanger (PCHE) can reach 60MPa, the problems that the viscosity of molten salt is high, the flowing is difficult and the like easily occur because the diameter of a medium flowing channel in the heat exchanger core is only about 0.5-1mm, and the application of the microchannel heat exchanger in a molten salt reactor system is seriously limited.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a plate heat exchanger core for nuclear power system can bear the fused salt and pile the big pressure differential of cold and hot both sides medium under operating condition, guarantees that the fused salt smoothly circulates.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a plate heat exchanger core for a nuclear power system comprises a plurality of groups of mutually overlapped plate pairs, wherein each group of plate pairs comprises two opposite plates, each plate is in a hexagonal honeycomb-shaped concave-convex corrugated unit topological structure, each plate comprises a plurality of corrugated units, each corrugated unit comprises convex corrugations arranged in a regular triangle and concave corrugations arranged in a regular triangle, and the convex corrugations and the concave corrugations are arranged in a staggered manner; two sheets forming a group of plate pairs are buckled with each other, the outer walls of the abutted concave corrugations are welded and sealed, and the outer walls of the convex corrugations in the two sheets form a cold medium side flow channel; two groups of adjacent plates which are mutually overlapped are welded and sealed on the outer wall of the convex corrugation which is mutually abutted, and the two groups of plates form a molten salt side flow channel on the outer wall of the concave corrugation; the fused salt side flow channel and the cold medium side flow channel are vertical to each other without a junction; the sides of the plate pairs are welded and sealed by connecting plates.
A plate heat exchanger core for a nuclear power system comprises a plurality of groups of mutually overlapped plate pairs, wherein each group of plate pairs comprises two opposite plates, each plate is in a regular quadrilateral concave-convex corrugated unit topological structure in honeycomb arrangement, each plate comprises a plurality of corrugated units, each corrugated unit comprises convex corrugations and concave corrugations in matrix arrangement, and the convex corrugations and the concave corrugations are arranged in a staggered manner; two sheets forming a group of plate pairs are buckled with each other, the outer walls of the abutted concave corrugations are welded and sealed, and the outer walls of the convex corrugations in the two sheets form a cold medium side flow channel; two groups of adjacent plates which are mutually overlapped are welded and sealed on the outer wall of the convex corrugation which is mutually abutted, and the two groups of plates form a molten salt side flow channel on the outer wall of the concave corrugation; the fused salt side flow channel and the cold medium side flow channel are vertical to each other without a junction; the sides of the plate pairs are welded and sealed by connecting plates.
Preferably, a plurality of baffle plates which are arranged in a staggered mode are welded on two inner side walls of the connecting plate, the outer side edges of the baffle plates are welded on the connecting plate, the inner side edges of the baffle plates extend into the fused salt side flow channel, and the length of each baffle plate is smaller than the width of the fused salt side flow channel.
Preferably, the inner side edge of the baffle plate is inclined downwards, and the included angle between the baffle plate and the connecting plate is 70-85 degrees.
The utility model is used in the working process of the molten salt reactor, the high temperature molten salt medium flows from high to low in the molten salt side flow channel, the low temperature medium flows from low to high in the cold medium side flow channel, and the flowing directions of the high temperature molten salt and the low temperature medium are in a cross shape; the high-temperature molten salt forms a reciprocating circular baffling under the obstruction of the baffle plate, the flowing distance of the high-temperature molten salt is increased, the high-temperature molten salt and a low-temperature medium perform sufficient heat exchange, and the high-temperature molten salt heat exchange system has high heat exchange efficiency.
The utility model has the advantages that:
(1) the sheet of the utility model adopts the concave-convex corrugated unit topological structure of hexagonal honeycomb arrangement or the concave-convex corrugated unit topological structure of regular quadrilateral honeycomb arrangement, and the honeycomb structure enables the high-temperature molten salt of the whole sheet of sheet to be uniformly cooled, so that the sheet completes the heat exchange work at the bearable temperature, and the molten salt can be ensured to smoothly circulate;
(2) the plate sheet of the utility model adopts a honeycomb structure, the occupied area is small after the heat exchange core body is integrated, the volume of the heat exchanger is reduced, and the transportation and the installation are convenient;
(3) the plate of the utility model adopts a honeycomb structure, thereby enhancing the pressure difference of the media at the cold side and the hot side born by the plate and meeting the required working condition;
(4) the utility model arranges the baffle plate in the heat exchange core body, and increases the length of the flow channel of the fused salt when the equipment normally operates, so that the fused salt can be fully exchanged with heat, and the heat exchange efficiency is improved; the fused salt medium in the core can be emptied in time when the equipment is stopped for maintenance, so that the cleaning frequency of the core is reduced.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic view of the direction of the medium flow during operation of the present invention;
FIG. 3 is a schematic view of the topological structure of the concave-convex corrugated units arranged in a hexagonal honeycomb manner in the main heat exchange area;
FIG. 4 is a sectional view taken along line A-A of FIG. 3;
FIG. 5 is a schematic diagram of a topological structure of concave-convex corrugated units arranged in a regular quadrilateral honeycomb shape in the main heat exchange zone;
FIG. 6 is a schematic view of the construction of an inclined baffle;
in the figure: 1. fused salt side flow channel 2, cold medium side flow channel 3, connecting plate 4, baffle plate 5, plate pair 6, plate sheet 7, convex corrugation 8 and concave corrugation.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example 1
As shown in fig. 1 to 4, the plate heat exchanger core for a nuclear power system includes a plurality of sets of plate pairs 5 stacked with each other, each set of plate pair 5 includes two opposite plates 6, each plate 6 is a concave-convex corrugated unit topological structure arranged in a hexagonal honeycomb manner, each plate 6 includes a plurality of corrugated units, each corrugated unit includes convex corrugations 7 arranged in a regular triangle and concave corrugations 8 arranged in a regular triangle, and the convex corrugations 7 and the concave corrugations 8 are arranged in a staggered manner; two sheets 6 forming a group of plate pairs 5 are buckled with each other, the outer walls of the butted concave corrugations 8 are welded and sealed, and the outer walls of the convex corrugations 7 in the two sheets 6 form a cold medium side flow passage 2; the outer walls of the convex corrugations 7, which are mutually overlapped and abutted to the two groups of adjacent plate pairs 5, are welded and sealed, and the outer walls of the concave corrugations 8 in the two groups of plate pairs 5 form a molten salt side flow channel 1; the fused salt side flow channel 1 and the cold medium side flow channel 2 are vertical to each other without a junction; the sides of the plate pairs 5 are sealed by welding with the connecting plates 3.
All weld the baffling board 4 that several crisscross arranged on two inside walls of connecting plate 3, the outside limit welding of baffling board 4 is on connecting plate 3, and in inboard limit extended to fused salt side runner 1, the length of baffling board 4 was less than the width of fused salt side runner 1. The inner side edge of the baffle plate 4 is inclined downwards, and the included angle between the baffle plate 4 and the connecting plate 3 is 70-85 degrees.
Example 2
As shown in fig. 5, the plate heat exchanger core for a nuclear power system includes a plurality of sets of plate pairs 5 stacked with each other, each set of plate pair 5 includes two opposite plates 6, each plate 6 is a concave-convex corrugated unit topological structure in a regular quadrilateral honeycomb arrangement, each plate 6 includes a plurality of corrugated units, each corrugated unit includes convex corrugations 7 and concave corrugations 8 arranged in a matrix shape, and the convex corrugations 7 and the concave corrugations 8 are arranged in a staggered manner; two sheets 6 forming a group of plate pairs 5 are buckled with each other, the outer walls of the butted concave corrugations 8 are welded and sealed, and the outer walls of the convex corrugations 7 in the two sheets 6 form a cold medium side flow passage 2; the outer walls of the convex corrugations 7, which are mutually overlapped and abutted to the two groups of adjacent plate pairs 5, are welded and sealed, and the outer walls of the concave corrugations 8 in the two groups of plate pairs 5 form a molten salt side flow channel 1; the fused salt side flow channel 1 and the cold medium side flow channel 2 are vertical to each other without a junction; the sides of the plate pairs 5 are sealed by welding with the connecting plates 3.
All weld the baffling board 4 that several crisscross arranged on two inside walls of connecting plate 3, the outside limit welding of baffling board 4 is on connecting plate 3, and in inboard limit extended to fused salt side runner 1, the length of baffling board 4 was less than the width of fused salt side runner 1. The inner side edge of the baffle plate 4 is inclined downwards, and the included angle between the baffle plate 4 and the connecting plate 3 is 70-85 degrees.
The utility model is used in the working process of the molten salt reactor, the high temperature molten salt medium flows from high to low in the molten salt side flow channel, the low temperature medium flows from low to high in the cold medium side flow channel, and the flowing directions of the high temperature molten salt and the low temperature medium are in a cross shape; the high-temperature molten salt forms a reciprocating circular baffling under the obstruction of the baffle plate, the flowing distance of the high-temperature molten salt is increased, the high-temperature molten salt and a low-temperature medium perform sufficient heat exchange, and the high-temperature molten salt heat exchange system has high heat exchange efficiency.
The utility model discloses well slab adopts the cellular unsmooth ripple unit topological structure of arranging of hexagon or the cellular unsmooth ripple unit topological structure of arranging of regular quadrilateral, and cellular structure makes whole slab high temperature fused salt by even cooling, makes the slab accomplish heat transfer work under the temperature that can bear, guarantees that the fused salt can smoothly circulate.
Claims (6)
1. The utility model provides a plate heat exchanger core for nuclear power system, it includes that the array overlaps each other board to (5), and every group board is to (5) including two sheets (6) that are arranged mutually, its characterized in that: the plate sheets (6) are of a hexagonal honeycomb-shaped concave-convex corrugated unit topological structure, each plate sheet (6) comprises a plurality of corrugated units, each corrugated unit comprises convex corrugations (7) which are arranged in a regular triangle and concave corrugations (8) which are arranged in a regular triangle, and the convex corrugations (7) and the concave corrugations (8) are arranged in a staggered mode; two sheets (6) forming a group of plate pairs (5) are buckled with each other, the outer walls of the butted concave corrugations (8) are welded and sealed, and the outer walls of the convex corrugations (7) in the two sheets (6) form a cold medium side flow channel (2); the outer walls of the convex corrugations (7) which are mutually overlapped and abutted with the two adjacent groups of plate pairs (5) are welded and sealed, and the outer walls of the concave corrugations (8) in the two groups of plate pairs (5) form a molten salt side flow channel (1); the fused salt side flow channel (1) and the cold medium side flow channel (2) are vertical to each other without a junction; the side edges of the plate pairs (5) are welded and sealed through the connecting plates (3).
2. The plate heat exchanger core for a nuclear power system of claim 1, wherein: the molten salt side runner is characterized in that a plurality of baffle plates (4) which are arranged in a staggered mode are welded on two inner side walls of the connecting plate (3), the outer side edges of the baffle plates (4) are welded on the connecting plate (3), the inner side edges of the baffle plates extend into the molten salt side runner (1), and the length of each baffle plate (4) is smaller than the width of the molten salt side runner (1).
3. The plate heat exchanger core for a nuclear power system of claim 2, wherein: the inner side edge of the baffle plate (4) is inclined downwards, and the included angle between the baffle plate (4) and the connecting plate (3) is 70-85 degrees.
4. The utility model provides a plate heat exchanger core for nuclear power system, it includes that the array overlaps each other board to (5), and every group board is to (5) including two sheets (6) that are arranged mutually, its characterized in that: the plate sheets (6) are of a concave-convex corrugated unit topological structure in regular quadrilateral honeycomb arrangement, each plate sheet (6) comprises a plurality of corrugated units, each corrugated unit comprises convex corrugations (7) and concave corrugations (8) which are arranged in a matrix shape, and the convex corrugations (7) and the concave corrugations (8) are arranged in a staggered mode; two sheets (6) forming a group of plate pairs (5) are buckled with each other, the outer walls of the butted concave corrugations (8) are welded and sealed, and the outer walls of the convex corrugations (7) in the two sheets (6) form a cold medium side flow channel (2); the outer walls of the convex corrugations (7) which are mutually overlapped and abutted with the two adjacent groups of plate pairs (5) are welded and sealed, and the outer walls of the concave corrugations (8) in the two groups of plate pairs (5) form a molten salt side flow channel (1); the fused salt side flow channel (1) and the cold medium side flow channel (2) are vertical to each other without a junction; the side edges of the plate pairs (5) are welded and sealed through the connecting plates (3).
5. The plate heat exchanger core for a nuclear power system of claim 4, wherein: the molten salt side runner is characterized in that a plurality of baffle plates (4) which are arranged in a staggered mode are welded on two inner side walls of the connecting plate (3), the outer side edges of the baffle plates (4) are welded on the connecting plate (3), the inner side edges of the baffle plates extend into the molten salt side runner (1), and the length of each baffle plate (4) is smaller than the width of the molten salt side runner (1).
6. The plate heat exchanger core for a nuclear power system of claim 5, wherein: the inner side edge of the baffle plate (4) is inclined downwards, and the included angle between the baffle plate (4) and the connecting plate (3) is 70-85 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921381342.7U CN211552546U (en) | 2019-08-23 | 2019-08-23 | Plate heat exchanger core for nuclear power system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921381342.7U CN211552546U (en) | 2019-08-23 | 2019-08-23 | Plate heat exchanger core for nuclear power system |
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| Publication Number | Publication Date |
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| CN211552546U true CN211552546U (en) | 2020-09-22 |
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| CN201921381342.7U Active CN211552546U (en) | 2019-08-23 | 2019-08-23 | Plate heat exchanger core for nuclear power system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110514041A (en) * | 2019-08-23 | 2019-11-29 | 兰州兰石换热设备有限责任公司 | Nuclear power system plate heat exchanger core |
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2019
- 2019-08-23 CN CN201921381342.7U patent/CN211552546U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110514041A (en) * | 2019-08-23 | 2019-11-29 | 兰州兰石换热设备有限责任公司 | Nuclear power system plate heat exchanger core |
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