Gas-steam combined cycle unit control device

Abstract

The utility model discloses a control device of a gas-steam combined cycle unit, which relates to the technical field of gas and comprises a gas turbine and a steam turbine, and a heat exchanger is connected between the gas turbine and the steam turbine. In the process that cold water enters the cylinder from the water inlet pipe and flows towards one end of the steam outlet pipe, when the cold water flows between the inner side of the cylinder and the outer side of the main steam passing pipe, the cold water forms internal and external conversion annular flow through flow guide of the multiple inner circulation gaps and the multiple outer circulation gaps, and therefore the cold water forms radial reciprocating flow in the flowing process; therefore, the inner layer and the outer layer of cold water are continuously changed, heat exchange of the main gas passing pipe and the gas passing branch pipes is more uniform, the phenomenon that a relatively static heat exchange layer is formed is avoided, the heat exchange efficiency of high-temperature flue gas and cold water is enhanced, and the heat exchange effect of the gas-steam combined cycle unit control device is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of gas technology, and in particular to a control device for a gas-steam combined cycle unit. Background Technology

[0002] Gas-fired steam combined cycle power generation technology is currently a mature power generation technology. Compared with thermal power and nuclear power, it is a relatively environmentally friendly power generation technology. Compared with wind power, hydropower and solar power, it does not have many limitations. However, traditional gas-fired steam combined cycle units cannot fully exchange heat with hot gas, resulting in poor heat exchange effect and failing to meet the demand.

[0003] To address the aforementioned issues, patent document CN221002881U discloses a control device for a gas-steam combined cycle unit, comprising a gas turbine and a steam turbine, with a heat exchanger connected between the gas turbines. A coaxial gas guide frame is installed inside the casing, and the flow direction of the gas in the inner heat exchanger tube frame is opposite to the flow direction of the central inlet pipe and the outer heat exchanger tube frame. By discharging the high-temperature flue gas generated by the gas turbine to the heat exchanger for heat energy recovery, the high-temperature steam discharged from the heat exchanger powers the steam turbine. The gas turbine and steam turbine can drive a generator, thus avoiding energy waste. The central inlet pipe, inner heat exchanger tube frame, and outer heat exchanger tube frame can extend the flow path of the high-temperature flue gas, increasing the heat exchange time of the high-temperature flue gas in the heat exchanger and ensuring sufficient heat exchange between the high-temperature flue gas and cold water, resulting in better heat exchange performance.

[0004] Based on the above research and combined with existing technologies, it was found that although existing heat exchangers extend the flow path of high-temperature flue gas to increase the heat exchange time within the heat exchanger and thus achieve sufficient heat exchange, the flue gas temperature in the inner and outer heat exchange tube racks gradually decreases as heat exchange proceeds. However, the flow direction of cold water within the cylinder is fixed. Therefore, different temperature differences will occur in the parts where cold water exchanges heat with the central inlet pipe, inner heat exchange tubes, and outer heat exchange tubes. Since the cold water is relatively stationary in the radial direction, these temperature differences will reduce the overall heat exchange efficiency. Therefore, a control device for gas-steam combined cycle units is needed. Utility Model Content

[0005] The purpose of this application is to provide a control device for a gas-fired steam combined cycle unit to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this application provides the following technical solution: a control device for a gas-steam combined cycle unit, comprising a gas turbine and a steam turbine, wherein a heat exchanger is connected between the gas turbine and the steam turbine, and the heat exchanger comprises a shell, a main gas pipe, a gas branch pipe, a first reversing plate and a second reversing plate, wherein a steam outlet pipe and a water inlet pipe are respectively provided at the upper and lower ends of the shell;

[0007] The sliding sleeve on the gas passage branch pipe is provided with a first spoiler ring plate and a second spoiler ring plate, the outer side of the first spoiler ring plate is in sliding contact with the inner side of the cylinder, an inner annular flow gap is formed between the inner side of the first spoiler ring plate and the outer side of the main gas passage, the inner side of the second spoiler ring plate is in sliding contact with the outer side of the main gas passage, and an outer annular flow gap is formed between the outer side of the second spoiler ring plate and the inner side of the cylinder;

[0008] The first spoiler ring plate and the second spoiler ring plate are both provided with a plurality of spoiler ring plates arranged in an interlaced manner.

[0009] The adjusting structure is used for adjusting the positions of the plurality of first spoiler ring plates and the plurality of second spoiler ring plates from the outside, so as to adjust the spacing between the plurality of first spoiler ring plates and the plurality of second spoiler ring plates.

[0010] Preferably, the adjusting structure comprises inner magnetic blocks and outer magnetic blocks, the inner magnetic blocks are provided with a plurality of inner magnetic blocks and are respectively fixedly embedded on the outer sides of the plurality of first spoiler ring plates or the outer sides of the plurality of second spoiler ring plates.

[0011] The outer magnetic blocks are also provided with a plurality of outer magnetic blocks and correspond to the plurality of inner magnetic blocks one by one, and each outer magnetic block is in magnetic attraction cooperation with the corresponding inner magnetic block.

[0012] The magnetic forces between the adjacent two inner magnetic blocks or the adjacent two outer magnetic blocks are repulsive.

[0013] Preferably, a flow cavity for the flow of cold water and the heat exchange between the main gas passage and the gas passage branch pipe is formed between the first reversing disc and the second reversing disc and between the outer wall of the main gas passage and the inner wall of the cylinder.

[0014] The communication parts of the water inlet pipe and the steam outlet pipe with the cylinder are located in the flow cavity, and the communication parts of the water inlet pipe and the steam outlet pipe with the cylinder are spaced apart from the end parts of the flow cavity, and the space is used for placing a plurality of first spoiler ring plates and second spoiler ring plates.

[0015] Preferably, the first spoiler ring plate is simultaneously sleeved on the inner layer gas passage branch pipe and the outer layer gas passage branch pipe, and the width of the inner annular flow gap is smaller than the spacing between the pipe wall of the inner layer gas passage branch pipe and the outer wall of the main gas passage.

[0016] The second spoiler ring plate is also simultaneously sleeved on the inner layer gas passage branch pipe and the outer layer gas passage branch pipe, and the width of the outer annular flow gap is smaller than the spacing between the pipe wall of the outer layer gas passage branch pipe and the inner wall of the cylinder.

[0017] Preferably, a containing groove is formed on the outer side wall of the cylinder, the extension direction of the containing groove is consistent with the axial direction of the cylinder, and the outer magnetic block is slidably embedded in the containing groove.

[0018] Preferably, the accommodating groove is offset from the steam outlet pipe, the accommodating groove is a T-shaped groove with an inner width equal to the width of the outer magnetic block and an opening width smaller than the inner width.

[0019] In summary, the technical effects and advantages of the utility model are:

[0020] 1、the utility model discloses, through the staggered arrangement of multiple first turbulence ring plate and second turbulence ring plate, make the cold water in the process of flowing from the water inlet pipe into the cylinder to the steam outlet pipe one end, when flowing between the inside of cylinder and the outside of main gas pipe, the flow of the cold water is changed inside and outside through multiple inner ring flow gap and outer ring flow gap, so that the cold water forms reciprocating flow in the radial direction in the flowing process, so that the cold water is not stopped between the inner and outer layers, the heat exchange of main gas pipe and gas branch pipe is more uniform, avoids forming the heat exchange layer phenomenon of relative static, so as to be favorable for enhancing the heat exchange efficiency of high-temperature flue gas and cold water, enhance the heat exchange effect of the gas steam combined cycle unit control device.

[0021] 2、the utility model discloses, through the adjustment structure adjustment multiple first turbulence ring plate and second turbulence ring plate position, so as to adjust the spacing between multiple first turbulence ring plate and second turbulence ring plate, to change the purpose of the cold water inner ring flow frequency, when the cold water inner ring flow frequency is faster, the cold water can be faster with the high-temperature flue gas in main gas pipe and gas branch pipe heat exchange, so as to reach the faster uniform heat exchange effect, the flow of cold water is smaller, is suitable for high-temperature flue gas temperature lower when carrying out sufficient heat exchange, when the cold water inner ring flow frequency is slower, the cold water can be slower with the high-temperature flue gas in main gas pipe and gas branch pipe heat exchange, so as to reach the slower uniform heat exchange effect, the flow of cold water is greater, is suitable for high-temperature flue gas higher when carrying out quick heat exchange, reach the purpose of more flexible adaptation of different heat exchange needs use. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, without creative labor, other drawings can also be obtained from these drawings.

[0023] Figure 1 It is a three-dimensional structure schematic diagram in the embodiment of the present application;

[0024] Figure 2 It is a front cut structure schematic diagram in the embodiment of the present application;

[0025] Figure 3 It is a first cross-sectional side cut structure schematic diagram in the embodiment of the present application;

[0026] Figure 4 Fig. 2 is a schematic view of a second cross-sectional side view of the embodiment.

[0027] In the figure: 1, cylinder; 11, water inlet pipe; 12, steam outlet pipe; 13, air inlet end; 14, air outlet end; 15, containing groove; 2, main air pipe; 3, air branch pipe; 4, first reversing disc; 5, second reversing disc; 6, first spoiler ring plate; 61, inner ring flow gap; 7, second spoiler ring plate; 71, outer ring flow gap; 8, inner magnetic block; 9, outer magnetic block. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0029] Embodiment: Reference Figures 1-4 The utility model discloses a kind of gas steam combined cycle unit control devices, including gas turbine and steam turbine, heat exchanger is connected between gas turbine and steam turbine, heat exchanger includes cylinder 1, main air pipe 2 and air branch pipe 3, the upper and lower ends of cylinder 1 are provided with steam outlet pipe 12 and water inlet pipe 11 respectively, the left and right sides of cylinder 1 are provided with air inlet end 13 and air outlet end 14 respectively, main air pipe 2 is located with cylinder 1 inside and is coaxially arranged with cylinder 1, air branch pipe 3 is provided with multiple and is divided into inner and outer two layers and is arranged between the outside of main air pipe 2 and the inside of cylinder 1, first reversing disc 4 for guiding flue gas in main air pipe 2 into inner layer air branch pipe 3 and guiding flue gas in outer layer air branch pipe 3 to export to air outlet end 14 is fixed in cylinder 1, second reversing disc 5 for guiding flue gas in inner layer air branch pipe 3 into outer layer air branch pipe 3 and connecting main air pipe 2 with air inlet end 13 is also fixed in cylinder 1;

[0030] First spoiler ring plate 6 and second spoiler ring plate 7 are slidably sleeved on air branch pipe 3, first spoiler ring plate 6 outside is in sliding contact with the inside of cylinder 1, and inner ring flow gap 61 is formed between first spoiler ring plate 6 inside and main air pipe 2 outside, second spoiler ring plate 7 inside is in sliding contact with the outside of main air pipe 2, and outer ring flow gap 71 is formed between second spoiler ring plate 7 outside and the inside of cylinder 1;

[0031] First spoiler ring plate 6 is simultaneously slidably sleeved on inner layer air branch pipe 3 and outer layer air branch pipe 3, and the width of inner ring flow gap 61 is less than the spacing between the pipe wall of inner layer air branch pipe 3 and the outer wall of main air pipe 2.

[0032] The second spoiler ring plate 7 is also simultaneously sleeved on the inner layer gas passing branch pipe 3 and the outer layer gas passing branch pipe 3, and the width of the outer ring flow gap 71 is smaller than the spacing between the pipe wall of the outer layer gas passing branch pipe 3 and the inner wall of the cylinder 1;

[0033] The first spoiler ring plate 6 and the second spoiler ring plate 7 are both provided with a plurality of and are arranged in a staggered manner;

[0034] The cylinder 1 is further provided with an adjusting structure on the first spoiler ring plate 6 and the second spoiler ring plate 7, and the adjusting structure is used to adjust the positions of the plurality of first spoiler ring plates 6 and the second spoiler ring plates 7, so as to adjust the spacing between the plurality of first spoiler ring plates 6 and the second spoiler ring plates 7.

[0035] Based on the above structure, through the staggered arrangement of the plurality of first spoiler ring plates 6 and the second spoiler ring plates 7, when the cold water flows along the inside of the cylinder 1 and the outside of the main gas passing pipe 2 during the process of flowing from the water inlet pipe 11 into the cylinder 1 to the end of the steam outlet pipe 12, the cold water forms an inside-outside alternating annular flow through the guide of the plurality of inner ring flow gaps 61 and the outer ring flow gaps 71, so that the cold water forms a reciprocating flow in the radial direction during the flowing process, so that the cold water is constantly changed between the inside and the outside, and the heat exchange of the main gas passing pipe 2 and the gas passing branch pipe 3 is more uniform, avoiding the formation of a relatively static heat exchange layer phenomenon, which is conducive to enhancing the heat exchange efficiency of the high-temperature flue gas and the cold water, and enhancing the heat exchange effect of the gas-steam combined cycle unit control device;

[0036] In addition, the staff can also adjust the positions of the plurality of first spoiler ring plates 6 and the second spoiler ring plates 7 through the adjusting structure, so as to adjust the spacing between the plurality of first spoiler ring plates 6 and the second spoiler ring plates 7, so as to change the frequency of the cold water inside ring flow reversing. When the frequency of the cold water inside ring flow reversing is fast, the cold water can exchange heat with the high-temperature flue gas in the main gas passing pipe 2 and the gas passing branch pipe 3 faster, so as to achieve a faster and more uniform heat exchange effect. At this time, the flow of the cold water is smaller, which is suitable for sufficient heat exchange when the temperature of the high-temperature flue gas is lower. When the frequency of the cold water inside ring flow reversing is slow, the cold water can exchange heat with the high-temperature flue gas in the main gas passing pipe 2 and the gas passing branch pipe 3 slower, so as to achieve a slower and more uniform heat exchange effect. At this time, the flow of the cold water is larger, which is suitable for fast heat exchange when the high-temperature flue gas is higher. The purpose of more flexible adaptation to different heat exchange needs is achieved.

[0037] Further, the adjusting structure includes an inner magnetic block 8 and an outer magnetic block 9, and the inner magnetic block 8 is provided with a plurality of and is respectively fixedly embedded on the outside of the plurality of first spoiler ring plates 6 or the outside of the plurality of second spoiler ring plates 7;

[0038] The outer magnetic block 9 is also provided with a plurality of and respectively corresponds to the plurality of inner magnetic blocks 8 one by one, and each outer magnetic block 9 is magnetically attracted to the corresponding inner magnetic block 8;

[0039] The magnetic force between two adjacent inner magnetic blocks 8 or two adjacent outer magnetic blocks 9 is repulsive.

[0040] Through the arrangement of the inner magnetic blocks 8 and the outer magnetic blocks 9, the user only needs to move the outer magnetic blocks 9, so that the outer magnetic blocks 9 drive the inner magnetic blocks 8 to move, thereby driving the corresponding first spoiler ring plate 6 or second spoiler ring plate 7 to move, so as to adjust the positions (distances) of the first spoiler ring plate 6 and the second spoiler ring plate 7. At the same time, the adjustment can be carried out externally while ensuring the sealing of the cylinder body 1, and the adjustment difficulty is reduced, and the use is more convenient.

[0041] Further, a flow cavity for the flow of cold water and heat exchange with the main air pipe 2 and the air branch pipe 3 is formed between the first reversing disc 4 and the second reversing disc 5, and between the outer wall of the main air pipe 2 and the inner wall of the cylinder body 1.

[0042] The communication parts of the water inlet pipe 11 and the steam outlet pipe 12 with the cylinder body 1 are located in the flow cavity, and the communication parts of the water inlet pipe 11 and the steam outlet pipe 12 with the cylinder body 1 are spaced from the ends of the flow cavity. The gap is used to place a certain number of first spoiler ring plates 6 and second spoiler ring plates 7.

[0043] The first spoiler ring plates 6 and the second spoiler ring plates 7 placed in the gap do not interfere with the flow direction of the cold water, and can adaptively supplement the number of the first spoiler ring plates 6 and the second spoiler ring plates 7 after adjusting the distance between the first spoiler ring plates 6 and the second spoiler ring plates 7, so that there are enough first spoiler ring plates 6 and second spoiler ring plates 7 to guide and disturb the cold water during the movement of the cold water from the water inlet pipe 11 to the steam outlet pipe 12, and the guiding and disturbing effect before and after the distance is changed is ensured.

[0044] Further, a containing groove 15 is formed on the outer side wall of the cylinder body 1, and the extension direction of the containing groove 15 is consistent with the axial direction of the cylinder body 1. The outer magnetic block 9 is slidingly embedded in the containing groove 15.

[0045] The containing groove 15 is offset from the steam outlet pipe 12, and the containing groove 15 is a T-shaped groove with an opening width smaller than an inner width. The inner width of the containing groove 15 is the same as the width of the outer magnetic block 9.

[0046] Through the arrangement of the containing groove 15, the outer magnetic block 9 can be accommodated in the containing groove 15, so that the outer magnetic block 9 is not easily subjected to accidental collision of external objects, greatly avoiding the risk of displacement or falling of the outer magnetic block 9 due to external object collision, and ensuring the stability of the outer magnetic block 9, thereby ensuring the stability of the positions of the first spoiler ring plate 6 and the second spoiler ring plate 7.

[0047] The utility model discloses a working principle: in the daily use process, cold water by inlet pipe 11 into the cylinder 1 to the steam pipe 12 one end flow; High temperature flue gas by the air inlet end 13 into main gas pipe 2 in, and under the direction of first reversing disc 4 by main gas pipe 2 into the inner layer gas branch pipe 3, again by the inner layer gas branch pipe 3 through the direction of second reversing disc 5 into the outer layer gas branch pipe 3, after passing through the outer layer gas branch pipe 3 and by first reversing disc 4 into the air outlet end 14 and finally discharge; Cold water and high temperature flue gas in the flowing process heat exchange, make cold water form steam and by steam turbine is transported to in the steam turbine;

[0048] Cold water in the flowing process through multiple inner ring flow gap 61 and the outer ring flow gap 71 guide flow formation inside and outside change annular flow, so that cold water forms the reciprocating flow in the radial in the flowing process, so that the inside and outside layer of cold water is not stopped change, the heat exchange of main gas pipe 2 and gas branch pipe 3 is more uniform, avoid forming the heat exchange layer phenomenon of relative static, in this way, it is favorable to enhance the heat exchange efficiency of high temperature flue gas and cold water, enhance the heat exchange effect of the gas steam combined cycle unit control device;

[0049] In addition, the staff can also drive the inner magnetic block 8 synchronous movement by moving the outer magnetic block 9, thereby adjusting the position of multiple first spoiler ring plate 6 and second spoiler ring plate 7, adjust the spacing between multiple first spoiler ring plate 6 and second spoiler ring plate 7, to reach the purpose of changing the frequency of cold water inner ring reversing flow, when the frequency of cold water inner ring reversing flow is faster, cold water can faster with the high temperature flue gas in main gas pipe 2 and gas branch pipe 3 heat exchange, so as to reach the faster uniform heat exchange effect, at this time, the flow of cold water is smaller, suitable for high temperature flue gas temperature is lower when carrying out sufficient heat exchange, when the frequency of cold water inner ring reversing flow is slower, cold water can slower with the high temperature flue gas in main gas pipe 2 and gas branch pipe 3 heat exchange, so as to reach the slower uniform heat exchange effect, at this time, the flow of cold water is greater, suitable for high temperature flue gas when carrying out rapid heat exchange, reach the purpose of more flexible adaptation of different heat exchange needs use.

[0050] Finally, it should be explained that: the above only for preferred embodiment of the utility model, and does not limit the utility model, although the utility model has been described in detail with reference to the foregoing embodiment, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part of technical features, any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the utility model, should be included in the protection scope of the utility model.

Claims

1. A gas-steam combined cycle unit control device, comprising a gas turbine and a steam turbine, a heat exchanger is connected between the gas turbine and the steam turbine, the heat exchanger comprises a cylinder (1), a main gas passage (2), a gas branch passage (3), a first reversing disc (4) and a second reversing disc (5), the upper and lower ends of the cylinder (1) are respectively provided with a steam outlet pipe (12) and a water inlet pipe (11), characterized in that: the first and second turbulence ring plates (6, 7) are slidably sleeved on the gas branch passage (3), the outer side of the first turbulence ring plate (6) is in sliding contact with the inner side of the cylinder (1), the inner side of the first turbulence ring plate (6) and the outer side of the main gas passage (2) form an inner annular flow gap (61), the inner side of the second turbulence ring plate (7) is in sliding contact with the outer side of the main gas passage (2), and the outer side of the second turbulence ring plate (7) and the inner side of the cylinder (1) form an outer annular flow gap (71); the first and second turbulence ring plates (6, 7) are both provided with a plurality of and are arranged in interlaced manner; wherein the cylinder (1), the first and second turbulence ring plates (6, 7) are further provided with an adjusting structure, the adjusting structure is used for adjusting the positions of the first and second turbulence ring plates (6, 7) from outside, so as to adjust the spacing between the first and second turbulence ring plates (6, 7). The adjusting structure comprises inner and outer magnetic blocks (8, 9), the inner magnetic blocks (8) are provided with a plurality of and are respectively fixedly embedded on the outer sides of the first turbulence ring plates (6) or the outer sides of the second turbulence ring plates (7); The outer magnetic blocks (9) are also provided with a plurality of and are respectively one-to-one corresponding to the inner magnetic blocks (8), each outer magnetic block (9) is in magnetic attraction cooperation with the corresponding inner magnetic block (8); wherein the magnetic forces between adjacent two inner magnetic blocks (8) or adjacent two outer magnetic blocks (9) are repulsive.

2. The control device for a gas and steam combined cycle unit according to claim 1, characterized in that: The first and second reversing discs (4, 5) and the outer wall of the main gas passage (2) and the inner wall of the cylinder (1) form a flow cavity for the flow of cold water and the heat exchange between the main gas passage (2) and the gas branch passage (3); The communication parts of the water inlet pipe (11) and the steam outlet pipe (12) with the cylinder (1) are located in the flow cavity, and the communication parts of the water inlet pipe (11) and the steam outlet pipe (12) with the cylinder (1) and the end parts of the flow cavity leave gaps, and the gaps are used for placing a plurality of first and second turbulence ring plates (6, 7). The first turbulence ring plate (6) is simultaneously slidably sleeved on the inner and outer gas branch passages (3), and the width of the inner annular flow gap (61) is smaller than the spacing between the pipe wall of the inner gas branch passage (3) and the outer wall of the main gas passage (2); 3. The control device for a gas and steam combined cycle unit according to claim 1, characterized in that: The second turbulence ring plate (7) is also simultaneously slidably sleeved on the inner and outer gas branch passages (3), and the width of the outer annular flow gap (71) is smaller than the spacing between the pipe wall of the outer gas branch passage (3) and the inner wall of the cylinder (1). ​ 4. The control device for a gas and steam combined cycle unit according to claim 1, characterized by: ​ ​ 5. The control device for a gas and steam combined cycle unit according to claim 2, characterized by: The outer side wall of the barrel (1) is provided with a containing groove (15), the extending direction of the containing groove (15) is consistent with the axial direction of the barrel (1), and the outer magnetic block (9) is slidingly embedded in the containing groove (15).

6. The control device for a gas and steam combined cycle unit according to claim 5, characterized by: The containing groove (15) is offset from the steam outlet pipe (12) and is a T-shaped groove with an inner width greater than an opening width, and the inner width of the containing groove (15) is the same as the width of the outer magnetic block (9).

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