CN116146962A - Evaporator with simplified inlet-outlet connection structure for carbon dioxide working medium - Google Patents
Evaporator with simplified inlet-outlet connection structure for carbon dioxide working medium Download PDFInfo
- Publication number
- CN116146962A CN116146962A CN202211718199.2A CN202211718199A CN116146962A CN 116146962 A CN116146962 A CN 116146962A CN 202211718199 A CN202211718199 A CN 202211718199A CN 116146962 A CN116146962 A CN 116146962A
- Authority
- CN
- China
- Prior art keywords
- header
- evaporator
- working medium
- heat exchange
- inlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
- F22B1/1823—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines for gas-cooled nuclear reactors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/002—Component parts or details of steam boilers specially adapted for nuclear steam generators, e.g. maintenance, repairing or inspecting equipment not otherwise provided for
Abstract
An evaporator with a simplified inlet-outlet connection structure of carbon dioxide working medium relates to an evaporator. In order to solve the problems of complex structure, corrosion scale and thermal resistance of the existing high-temperature gas cooled reactor steam generator by taking water as a working medium. The evaporator for simplifying the inlet and outlet connection structure of the carbon dioxide working medium comprises a plurality of heat exchange units, an upper header, an upper small header, a lower small header and a lower header; the CO adopted by the invention 2 The chemical property of the gas turbine is relatively stable, the leakage risk is reduced, the efficiency is high, the structure is more compact, and the flow resistance to helium is reduced. According to the invention, through optimizing the inlet and outlet tube bundle structures of the working medium, the inlet and outlet structure of the working medium is simplified, the structure is mature and reliable, modular construction and installation can be realized, the manufacturing difficulty of the process is reduced, the installation and construction man-hour is shortened, and the investment is reduced.
Description
Technical Field
The present invention relates to an evaporator.
Background
The existing high-temperature gas cooled reactor steam generator uses water vapor as working medium, and the inlet and outlet connecting pipes are complex in structure, mostly connected by small pipes, large in connection quantity, multiple in small pipes, bent pipes and winding pipes, complex in connection, high in required installation precision, and therefore high in manufacturing process difficulty. And the installation time is needed, the yield of the heated unit is lower, and the manufacturing cost is high. And space is limited, and modularization cannot be realized. Once helium leaks from a working medium side steam pipe of the steam generator taking steam as working medium, a reactor is wasted, the nuclear power station is stopped, huge economic loss and social benefit are caused, and the leaked helium pollutes the environment and endangers the life safety of human beings. Meanwhile, water is used as a working medium, and the water side has scouring and corrosion rates on the heating surface of the boiler, and scale and thermal resistance are easy to generate.
Disclosure of Invention
The invention provides an evaporator with a simplified inlet-outlet connection structure of a carbon dioxide working medium, which aims to solve the problems that the existing high-temperature gas cooled reactor steam generator is complex in structure and has corrosion scale and thermal resistance due to the fact that water is used as the working medium.
The evaporator for simplifying the inlet and outlet connection structure of the carbon dioxide working medium comprises a plurality of heat exchange units, an upper header, an upper small header, a lower small header and a lower header;
the heat exchange unit consists of a plurality of composite pipes with different radiuses and concentrically sleeved together, the composite pipes consist of an outer sleeve, a spiral pipe and an inner sleeve, and the spiral pipe is arranged between the outer sleeve and the inner sleeve; the working medium in the spiral tube is CO 2 The method comprises the steps of carrying out a first treatment on the surface of the The upper part of the evaporator is provided with a top shell channel, and the shell of the top shell channel extends downwards to form a guard plate; the plurality of heat exchange units are arranged in a guard plate in the middle of the evaporator, a bottom shell channel is arranged at the lower part of the evaporator, a shell of the bottom shell channel extends upwards to form a pressure shell, the upper end of the pressure shell is open, and the guard plate is inserted into the pressure shell from the upper end opening of the pressure shell; a helium inlet is formed in the left side of the top shell channel; the upper header is arranged in the header shell on the right side of the top shell channel; the plurality of upper small headers are arranged above the plurality of heat exchange units in the top shell channel; each upper small header is communicated with spiral pipes in a plurality of heat exchange units, and the upper small header is communicated with the upper header through an upper header connecting pipe; the lower header is arranged below the outer part of the evaporator; the plurality of lower small boxes are arranged below the plurality of heat exchange units in the bottom shell channel; each lower small header is communicated with the spiral pipes in the heat exchange units, and the lower small header is communicated with the lowerThe header is communicated through a lower header connecting pipe; the upper small boxes are horizontally arranged strip-shaped boxes, and a plurality of upper small boxes are mutually arranged in parallel and distributed in two plane layers; the lower small boxes are horizontally arranged strip-shaped boxes, and a plurality of lower small boxes are mutually arranged in parallel and distributed in two plane layers.
The principle and beneficial effects of the invention are as follows:
1. the operation process of the steam generator comprises the following steps:
(1) helium flow: high-temperature helium gas from the reactor enters the steam generator through the helium gas inlet, the helium gas flows from top to bottom, flows to the bottom shell channel from a primary flow channel formed by a gap between the inner sleeve and the outer sleeve, finally is discharged out of the steam generator through a gap between the pressure shell and the guard plate, and returns to the reactor. During which the high-temperature helium gas transfers the carried heat to the CO inside through the spiral tube 2 Working medium; (2) CO 2 The flow of gas is as follows: low temperature CO 2 Distributing the gas in the lower header to a plurality of lower small headers which are distributed to the connected spiral pipes, and distributing CO in the spiral pipes 2 Collecting the heat absorbed by the upper small header to different upper small headers, collecting the heat absorbed by the upper small header to the upper small header, and collecting high-temperature CO 2 The device can be used for a high-pressure cylinder of a steam turbine to drive a generator to generate electricity.
2. The CO adopted by the invention 2 Is relatively stable in chemical property, has a low corrosion rate under medium and low temperature conditions, and is CO 2 The working medium does not produce dirt, does not generate phase change, reduces the leakage risk and CO 2 The requirement range for selecting the materials of the parts is relatively wide, and the difficulty of selecting the materials of the key parts is reduced. The invention uses CO 2 The steam generator has high efficiency due to the working medium, can reduce the heat transfer area, has small heating surface area and more compact structure; the key components and the whole system occupy smaller space, and compared with a large amount of boiler pipeline equipment required by water vapor, the flow deviation of each heat exchange unit is reduced, the flow resistance to helium is reduced, and the occurrence of thermal stress, thermal fatigue, high-temperature corrosion or metal embrittlement caused by high-temperature high-pressure airflow scouring is reduced. The invention simplifies the working medium by optimizing the structure of the inlet and outlet tube bundles of the working mediumThe inlet and outlet structure is mature and reliable, modular construction and installation can be realized, the process manufacturing difficulty is reduced, the installation and construction man-hour is shortened, and the investment is reduced.
Drawings
FIG. 1 is a schematic structural diagram of an evaporator with a simplified inlet-outlet connection structure for carbon dioxide working fluids in example 1;
FIG. 2 is a top view of the upper header 6 in the top housing channel 2;
FIG. 3 is a side view of the upper header 6 in the top housing channel 2;
fig. 4 is a cross-sectional view of 1 heat exchange unit 7;
fig. 5 shows a distribution diagram of the heat exchange unit 7 in the shield 8.
Detailed Description
The technical scheme of the invention is not limited to the specific embodiments listed below, and also comprises any reasonable combination of the specific embodiments.
The first embodiment is as follows: the evaporator of the simplified inlet-outlet connection structure of the carbon dioxide working medium in the embodiment consists of a plurality of heat exchange units 7, an upper header 4, an upper small header 6, a lower small header 10 and a lower header 13;
the heat exchange unit 7 is composed of a plurality of concentric overlapped composite pipes with different radiuses, the composite pipes are composed of an outer sleeve 14, a spiral pipe 15 and an inner sleeve 16, and the spiral pipe 15 is arranged between the outer sleeve 14 and the inner sleeve 16; the working medium in the spiral pipe 15 is CO 2 The method comprises the steps of carrying out a first treatment on the surface of the The upper part of the evaporator is provided with a top shell channel 2, and the shell of the top shell channel 2 extends downwards to form a guard plate 8; the plurality of heat exchange units 7 are arranged in a guard plate 8 at the middle part of the evaporator, a bottom shell channel 12 is arranged at the lower part of the evaporator, a shell of the bottom shell channel 12 extends upwards to form a pressure shell 9, the upper end of the pressure shell 9 is open, and the guard plate 8 is inserted into the pressure shell 9 from the upper end opening of the pressure shell 9; a helium inlet 1 is arranged on the left side of the top shell channel 2; the upper header 4 is arranged in a header housing 5 on the right side of the top shell channel 2; a plurality of upper small header 6 are arranged above a plurality of heat exchange units 7 in the top shell channel 2; each upper small header 6 is communicated with a plurality of spiral pipes 15 in the heat exchange units 7, and the upper small header 6 is connected with the upper header 4 through an upper header connecting pipe 3The communication is carried out; the lower header 13 is arranged outside and below the evaporator; a plurality of lower small header 10 are arranged below the plurality of heat exchange units 7 in the bottom shell channel 12; each lower small header 10 is communicated with a plurality of spiral pipes 15 in the heat exchange units 7, and the lower small header 10 is communicated with the lower header 13 through a lower header connecting pipe 11; the upper small boxes 6 are horizontally arranged strip boxes, and a plurality of upper small boxes 6 are mutually arranged in parallel and distributed in two plane layers; the lower small header 10 is a bar header arranged horizontally, and a plurality of lower small headers 10 are arranged in parallel and distributed in two plane layers.
CO adopted in the present embodiment 2 Is relatively stable in chemical property, has a low corrosion rate under medium and low temperature conditions, and is CO 2 The working medium does not produce dirt, does not generate phase change, reduces the leakage risk and CO 2 The requirement range for selecting the materials of the parts is relatively wide, and the difficulty of selecting the materials of the key parts is reduced. In the present embodiment, CO 2 The steam generator has high efficiency due to the working medium, can reduce the heat transfer area, has small heating surface area and more compact structure; the key components and the whole system occupy smaller space, and compared with a large amount of boiler pipeline equipment required by water vapor, the flow deviation of each heat exchange unit is reduced, the flow resistance to helium is reduced, and the occurrence of thermal stress, thermal fatigue, high-temperature corrosion or metal embrittlement caused by high-temperature high-pressure airflow scouring is reduced. According to the embodiment, through optimizing the inlet and outlet tube bundle structures of the working medium, the inlet and outlet structure of the working medium is simplified, the structure is mature and reliable, modular construction and installation can be realized, the process manufacturing difficulty is reduced, the installation and construction man-hour is shortened, and the investment is reduced.
The second embodiment is as follows: the first difference between this embodiment and the specific embodiment is that: the center of the innermost composite tube in the heat exchange unit 7 is provided with a center tube 17.
And a third specific embodiment: this embodiment differs from the first or second embodiment in that: the outer sleeve 14, the spiral tube 15 and the inner sleeve 16 are made of 690H alloy steel pipes or T91 alloy steel pipes.
The specific embodiment IV is as follows: this embodiment differs from one of the first to third embodiments in that: the number of the upper small boxes 6 is 5, 3 upper small boxes 6 are arranged in the lower layer plane layer, and 2 upper small boxes 6 are arranged in the upper layer plane layer.
Fifth embodiment: this embodiment differs from one to four embodiments in that: the number of the lower small boxes 10 is 5, 3 lower small boxes 10 are arranged in the lower layer plane layer, and 2 lower small boxes 10 are arranged in the upper layer plane layer.
Specific embodiment six: this embodiment differs from one of the first to fifth embodiments in that: the lengths of the spiral tubes 15 in the different composite tubes in the heat exchange unit 7 are the same.
Example 1:
1-5, the evaporator of the simplified inlet-outlet connection structure of the carbon dioxide working medium of the embodiment is composed of a plurality of heat exchange units 7, an upper header 4, an upper small header 6, a lower small header 10 and a lower header 13;
the heat exchange unit 7 is composed of a plurality of composite pipes with different radiuses and concentrically sleeved together, the composite pipes are composed of an outer sleeve 14, a spiral pipe 15 and an inner sleeve 16, the spiral pipe 15 is arranged between the outer sleeve 14 and the inner sleeve 16, and the lengths of the spiral pipes 15 in different composite pipes in the heat exchange unit 7 are the same; the center of the innermost composite tube in the heat exchange unit 7 is provided with a center tube 17; the outer sleeve 14, the spiral tube 15 and the inner sleeve 16 are made of 690H alloy steel tubes, and working medium in the spiral tube 15 is CO 2 The method comprises the steps of carrying out a first treatment on the surface of the The upper part of the evaporator is provided with a top shell channel 2, and the shell of the top shell channel 2 extends downwards to form a guard plate 8; the plurality of heat exchange units 7 are arranged in a guard plate 8 at the middle part of the evaporator, a bottom shell channel 12 is arranged at the lower part of the evaporator, a shell of the bottom shell channel 12 extends upwards to form a pressure shell 9, the upper end of the pressure shell 9 is open, and the guard plate 8 is inserted into the pressure shell 9 from the upper end opening of the pressure shell 9; a helium inlet 1 is arranged on the left side of the top shell channel 2; the upper header 4 is arranged in a header housing 5 on the right side of the top shell channel 2; the 5 upper small header 6 is arranged above the plurality of heat exchange units 7 in the top shell channel 2; each upper small header 6 is communicated with a plurality of spiral pipes 15 in the heat exchange units 7, and the upper small header 6 is communicated with the upper header 4 through an upper header connecting pipe 3; the lower header 13 is arranged outside and below the evaporator; 5 lower small header 10 setsUnder the plurality of heat exchange units 7 in the bottom shell channel 12; each lower small header 10 is communicated with a plurality of spiral pipes 15 in the heat exchange units 7, and the lower small header 10 is communicated with the lower header 13 through a lower header connecting pipe 11; the upper small boxes 6 are horizontally arranged strip boxes, the 5 upper small boxes 6 are mutually arranged in parallel and distributed in two plane layers, the lower plane layer is internally provided with 3 upper small boxes 6, and the upper plane layer is internally provided with 2 upper small boxes 6; the lower small boxes 10 are horizontally arranged strip-shaped boxes, and the 5 lower small boxes 10 are mutually arranged in parallel and distributed in two plane layers; 3 lower small boxes 10 are arranged in the lower plane layer, and 2 lower small boxes 10 are arranged in the upper plane layer;
the CO used in this example 2 Is relatively stable in chemical property, has a low corrosion rate under medium and low temperature conditions, and is CO 2 The working medium does not produce dirt, does not generate phase change, reduces the leakage risk and CO 2 The requirement range for selecting the materials of the parts is relatively wide, and the difficulty of selecting the materials of the key parts is reduced. The invention uses CO 2 The steam generator has high efficiency due to the working medium, can reduce the heat transfer area, has small heating surface area and more compact structure; the key components and the whole system occupy smaller space, and compared with a large amount of boiler pipeline equipment required by water vapor, the flow deviation of each heat exchange unit is reduced, the flow resistance to helium is reduced, and the occurrence of thermal stress, thermal fatigue, high-temperature corrosion or metal embrittlement caused by high-temperature high-pressure airflow scouring is reduced. According to the invention, through optimizing the inlet and outlet tube bundle structures of the working medium, the inlet and outlet structure of the working medium is simplified, the structure is mature and reliable, modular construction and installation can be realized, the manufacturing difficulty of the process is reduced, the installation and construction man-hour is shortened, and the investment is reduced.
Claims (6)
1. An evaporator of a simplified inlet-outlet connection structure of a carbon dioxide working medium is characterized in that: the evaporator of the simplified inlet-outlet connection structure of the carbon dioxide working medium consists of a plurality of heat exchange units (7), an upper header (4), an upper small header (6), a lower small header (10) and a lower header (13);
the heat exchange unit (7) is formed by a plurality of concentric stacked heat exchange units with different radiusesThe composite pipe is composed of an outer sleeve (14), a spiral pipe (15) and an inner sleeve (16), wherein the spiral pipe (15) is arranged between the outer sleeve (14) and the inner sleeve (16); the working medium in the spiral tube (15) is CO 2 The method comprises the steps of carrying out a first treatment on the surface of the The upper part of the evaporator is provided with a top shell channel (2), and the shell of the top shell channel (2) extends downwards to form a guard plate (8); the heat exchange units (7) are arranged in a guard plate (8) at the middle part of the evaporator, a bottom shell channel (12) is arranged at the lower part of the evaporator, a shell of the bottom shell channel (12) extends upwards to form a pressure shell (9), the upper end of the pressure shell (9) is open, and the guard plate (8) is inserted into the pressure shell (9) from the upper end opening of the pressure shell (9); a helium inlet (1) is arranged at the left side of the top shell channel (2); the upper header (4) is arranged in a header shell (5) on the right side of the top shell channel (2); a plurality of upper small boxes (6) are arranged above a plurality of heat exchange units (7) in the top shell channel (2); each upper small header (6) is communicated with spiral pipes (15) in a plurality of heat exchange units (7), and the upper small header (6) is communicated with the upper header (4) through an upper header connecting pipe (3); the lower header (13) is arranged below the outer part of the evaporator; a plurality of lower small boxes (10) are arranged below a plurality of heat exchange units (7) in the bottom shell channel (12); each lower small header (10) is communicated with spiral pipes (15) in a plurality of heat exchange units (7), and the lower small header (10) is communicated with a lower header (13) through a lower header connecting pipe (11); the upper small boxes (6) are horizontally arranged strip boxes, and a plurality of upper small boxes (6) are mutually arranged in parallel and distributed in two plane layers; the lower small boxes (10) are horizontally arranged strip-shaped boxes, and a plurality of lower small boxes (10) are mutually arranged in parallel and distributed in two plane layers.
2. The evaporator with simplified inlet and outlet connection structure for carbon dioxide working medium according to claim 1, wherein: the center of the innermost composite tube in the heat exchange unit (7) is provided with a central tube (17).
3. The evaporator with simplified inlet and outlet connection structure for carbon dioxide working medium according to claim 1, wherein: the outer sleeve (14), the spiral tube (15) and the inner sleeve (16) are made of 690H alloy steel pipes or T91 alloy steel pipes.
4. The evaporator with simplified inlet and outlet connection structure for carbon dioxide working medium according to claim 1, wherein: the number of the upper small boxes (6) is 5, 3 upper small boxes (6) are arranged in the lower plane layer, and 2 upper small boxes (6) are arranged in the upper plane layer.
5. The evaporator with simplified inlet and outlet connection structure for carbon dioxide working medium according to claim 1, wherein: the number of the lower small boxes (10) is 5, 3 lower small boxes (10) are arranged in the lower plane layer, and 2 lower small boxes (10) are arranged in the upper plane layer.
6. The evaporator with simplified inlet and outlet connection structure for carbon dioxide working medium according to claim 1, wherein: the lengths of the spiral pipes (15) in different composite pipes in the heat exchange unit (7) are the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211718199.2A CN116146962A (en) | 2022-12-29 | 2022-12-29 | Evaporator with simplified inlet-outlet connection structure for carbon dioxide working medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211718199.2A CN116146962A (en) | 2022-12-29 | 2022-12-29 | Evaporator with simplified inlet-outlet connection structure for carbon dioxide working medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116146962A true CN116146962A (en) | 2023-05-23 |
Family
ID=86361209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211718199.2A Pending CN116146962A (en) | 2022-12-29 | 2022-12-29 | Evaporator with simplified inlet-outlet connection structure for carbon dioxide working medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116146962A (en) |
-
2022
- 2022-12-29 CN CN202211718199.2A patent/CN116146962A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3941187A (en) | Consolidated nuclear steam generator | |
| CN202485495U (en) | Shell-and-tube type heat exchanger of baffle of ADS (accelerator driven system) reactor | |
| CN101245971B (en) | Enclosed cavity type heat exchanger | |
| CN102564169A (en) | Baffle shell-and-tube heat exchanger for ADS (accelerator-driven system) reactor | |
| CN107606974A (en) | Integrated combination heat exchanger | |
| US4289196A (en) | Modular heat exchangers for consolidated nuclear steam generator | |
| US4124064A (en) | Consolidated nuclear steam generator | |
| US4174123A (en) | Vessel penetration apparatus | |
| US4045285A (en) | Plant for the production of hydrogen through utilization of heat energy obtained from a gas-cooled nuclear reactor | |
| CN112071453A (en) | Design scheme of direct-current countercurrent pore channel type heat exchanger/evaporator | |
| CN111664427A (en) | Design scheme of ultra-high temperature and ultra-high pressure pore channel type heat exchanger/evaporator | |
| CN106642039B (en) | A kind of board-like steam generator of multipurpose | |
| CN116146962A (en) | Evaporator with simplified inlet-outlet connection structure for carbon dioxide working medium | |
| CN201503005U (en) | Primary side four-chamber two-way flow heat exchange tube pressured water reactor steam generator | |
| US4073267A (en) | Vapor generator | |
| CN113217222B (en) | Stirling engine system for coupling liquid metal cooling reactor | |
| CN109737365B (en) | Cuboid sodium-water integrated steam generator | |
| KR102196660B1 (en) | Steam generator module of the sodium-cooled fast reactor and steam generator thereof | |
| CN114255894A (en) | Steam generator of high-temperature gas cooled reactor type supercritical ultra-supercritical boiler | |
| CN109830313B (en) | Steam generator spiral heat exchange tube supporting structure convenient to disassemble without welding | |
| CN210165351U (en) | Synthetic waste heat boiler with superheated steam as byproduct | |
| CN220229084U (en) | Industrial steam production system | |
| CN101706096B (en) | Improved waste heat boiler | |
| CN110953562A (en) | Vertical natural circulation steam generator | |
| CN113188344B (en) | Additive manufacturing heat exchanger with half' loop pipe type baffling and drainage structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |