Built-in condensation water heat regeneration device of double-backpressure condenser
By designing a built-in condensate heat recovery device in the condenser, the combination of fake bottom plate, hydrophobic riser, hydrophobic pipe and water shower tray is used to solve the problem of condensate supercooling caused by the condenser structure, and the effect of reducing coal consumption of the generator unit is achieved.
Patent Information
- Application Number
- CN202421389437.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-18
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-06-18
AI Technical Summary
The condenser used in existing power plants has supercooled condensate due to its own structure, which increases the coal consumption of the entire generator set.
A built-in condensate heat recovery device with a dual backpressure condenser is designed. Through the combination of fake bottom plate, hydrophobic riser, hydrophobic pipe, hydrophobic branch pipe and water shower tray, the condensate heat recovery process from the low-pressure side to the high-pressure side is realized, ensuring that the condensate is in full contact with the steam on the high-pressure side and reducing the supercooling degree.
It effectively reduces the supercooling degree of condensate and reduces the coal consumption of the generator set.
Smart Images
Figure CN222747794U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a built-in condensate heat recovery device for a double back-pressure condenser, belonging to the field of condensers for power plants. Background Art
[0002] Condensers are divided into surface type and mixed type according to the different steam condensation methods: the condensers used in power plants are surface type, and the steam is cooled into liquid on cooling tubes separated from the cooling medium.
[0003] Condensers used in power plants, especially the double-shell condensers of the 660MW and 1000MW large units that are more popular nowadays, have a structure that causes the condensate to gradually decrease in temperature as it passes through layers of cooling tubes from top to bottom. The existence of supercooling of the condensate will cause the oxygen content in the condensate to be high, and will also increase the coal consumption of the entire unit.
[0004] In summary, the condenser used in existing power plants causes the condensate to be supercooled due to its own structure, which increases the coal consumption of the entire generating unit. Summary of the invention
[0005] The utility model aims to solve the technical problem that the condenser used in the existing power plant has supercooling due to its own structure, which increases the coal consumption of the entire generator set, and further provides a built-in condensate heat recovery device for a double back-pressure condenser.
[0006] The technical scheme of the utility model is a built-in condensate heat recovery device for a double back-pressure condenser, comprising a condenser, a false bottom plate, a drain riser, a plugging plate, a drain pipe, a connecting pipe, a drain branch pipe, a water sprinkling plate and a condensate outlet, wherein the false bottom plate is horizontally arranged at the lower part of the low-pressure side of the condenser, two drain holes are vertically provided on the false bottom plate, the top surface of the drain riser is connected with the drain holes, the drain pipe is arranged at the lower part of the high-pressure side and the low-pressure side of the condenser, plugging plates are arranged at both ends of the drain pipe, the bottom surface of the drain riser is connected with the drain hole, and the drain pipe is connected with the drain hole. The top surfaces of the water pipes are connected, and drain branches are connected on both sides of the drain pipe arranged on the high-pressure side of the condenser. A water spraying plate is installed on the top surface of the drain branch pipe. A connecting pipe is arranged between the high-pressure side and the low-pressure side of the condenser. The connecting pipe is arranged on the outside of the drain pipe. The connecting pipe is used to connect the high-pressure side and the low-pressure side of the condenser. The condensate in the condenser flows from the low-pressure side of the condenser to the high-pressure side of the condenser through the false bottom plate, the drain riser, the drain pipe, the drain branch pipe and the water spraying plate in sequence, and the condensate outlet is arranged at the bottom of the condenser.
[0007] As another improvement of the utility model, the height of the water spray plate is lower than the height of the false bottom plate by M, M is not less than the water level height dimension corresponding to the pressure difference between the high-pressure side and the low-pressure side of the condenser, and the value range of M is 50mm to 200mm.
[0008] As another improvement of the present invention, the number of water spray pans is N, the length of the water spray pan is the same as the length of the inner wall of the condenser, the width of the water spray pan is less than 1 / N of the width of the condenser, and a plurality of small holes are provided on the water spray pan, and the total cross-sectional area of the plurality of small holes is not less than the cross-sectional area of the drain pipe.
[0009] As another improvement of the present invention, the number of the water spraying plates is N, and the value range of N is 2 to 8.
[0010] As another improvement of the utility model, the size of the false bottom plate is the same as the cross-sectional area size of the inner wall of the low-pressure side of the condenser, and the false bottom plate is welded to the inner wall of the low-pressure side of the condenser.
[0011] As another improvement of the utility model, the condensate outlet is arranged at the bottom of the high-pressure side of the condenser.
[0012] As another improvement of the utility model, the condensate outlet is arranged at the bottom of the low-pressure side of the condenser.
[0013] As another improvement of the present invention, baffles are provided at both ends of the water spraying plate in the width direction.
[0014] As another improvement of the utility model, it also includes a first compensation joint and a second compensation joint, wherein the first compensation joint is installed on the connecting pipe, and the second compensation joint is installed on the drain pipe.
[0015] Beneficial effects of the utility model:
[0016] 1. The condensate in the condenser of the utility model flows from the low-pressure side of the condenser to the high-pressure side of the condenser through the false bottom plate, the drain riser, the drain pipe, the drain branch pipe and the water spray plate in sequence, thereby solving the technical problem of the supercooling of the condensate due to the structure of the condenser itself and reducing the coal consumption of the entire generator set.
[0017] 2. The height dimension of the water spray pan of the utility model is lower than the height dimension of the false bottom plate by M, and M is not less than the water level height dimension corresponding to the pressure difference between the high-pressure side and the low-pressure side of the condenser to ensure that the condensate can be effectively transported to the water spray pan.
[0018] 3. There are several small holes on the water spray plate, and the total cross-sectional area of the holes is not less than the cross-sectional area of the drain pipe. Baffles are set at both ends of the width direction of the water spray plate to make the condensed water flow down from the small holes in the form of small water droplets or water columns. The condensed water with lower temperature on the low-pressure side is fully in contact with the steam on the high-pressure side, which increases the temperature and reduces the degree of subcooling. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 The utility model is a left schematic diagram of a built-in condensate heat recovery device of a double back-pressure condenser.
[0020] Figure 2 It is a structural diagram of a water spray plate and a baffle.
[0021] Figure 3 The utility model is a front view schematic diagram of a built-in condensate heat recovery device of a double back-pressure condenser.
[0022] Figure 4 The utility model is a top view schematic diagram of a built-in condensate heat recovery device of a double back-pressure condenser. DETAILED DESCRIPTION
[0023] The following will be combined with the drawings in the examples of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model. In the description of the utility model, it should be explained that the positional relationship indicated by the terms "upper" and "lower" is only based on the positional relationship of the orientation shown in the drawings, which is only for the convenience of describing the utility model, and does not indicate or imply that the referred parts have a specific orientation, are constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.
[0024] Specific implementation method 1: Combination Figure 1 , Figure 3 and Figure 4The present embodiment is described. The present embodiment is a built-in condensate heat recovery device for a double back-pressure condenser, comprising a condenser, a false bottom plate 1, a drain riser 2, a plugging plate 3, a drain pipe 4, a connecting pipe 7, a drain branch pipe 8, a water spraying plate 9 and a condensate outlet 11. The false bottom plate 1 is horizontally arranged at the lower part of the low-pressure side of the condenser. Two drain holes are vertically opened on the false bottom plate 1. Condensate from the upper part of the condenser flows through the drain holes. The top surface of the drain riser 2 is connected to the drain holes. The drain pipe 4 is arranged at the lower part of the high-pressure side and the low-pressure side of the condenser. Plugs 3 are arranged at both ends of the drain pipe 4. The bottom surface of the drain riser 2 is connected to the top surface of the drain pipe 4. The drain pipe 4 on the high-pressure side of the condenser is connected with drain branch pipes 8 on both sides. The total flow area of the drain branch pipes 8 should not be less than the flow area of the drain pipe 4. A water spraying plate 9 is installed on the top surface of the drain branch pipe 8. The high-pressure side and the low-pressure side of the condenser are arranged adjacently. A connecting pipe 7 is arranged between the high-pressure side and the low-pressure side of the condenser. The connecting pipe 7 is arranged on the outside of the drain pipe 4. The connecting pipe 7 is used to connect the high-pressure side and the low-pressure side of the condenser. The condensate in the condenser flows from the low-pressure side of the condenser to the high-pressure side of the condenser through the false bottom plate 1, the drain riser 2, the drain pipe 4, the drain branch pipe 8 and the water spraying plate 9 in sequence. The condensate outlet 11 is arranged at the bottom of the condenser. The technical problem of the subcooling of the condensate due to the structure of the condenser itself is solved, and the coal consumption of the entire generator set is reduced.
[0025] Specific implementation method 2: Combination Figure 1 , Figure 3 and Figure 4 This embodiment is described. The difference between this embodiment and the first embodiment is that the height of the water spraying plate 9 is lower than the height of the false bottom plate 1. The height difference between the two is M. M is not less than the water level height corresponding to the pressure difference between the high-pressure side and the low-pressure side of the condenser. The value range of M is 50mm to 200mm. The function is to ensure that the condensed water can be effectively transported to the water spraying plate. The other components and connection methods are the same as those of the first embodiment.
[0026] Specific implementation method three: Combination Figure 1 , Figure 3 and Figure 4 This embodiment is described. The difference between this embodiment and the specific embodiment 1 is that the number of water spraying plates 9 is N, the length of the water spraying plate 9 is the same as the length of the inner wall of the condenser, the width of the water spraying plate 9 is less than 1 / N of the width of the condenser, and a plurality of small holes are provided on the water spraying plate 9, and the total cross-sectional area of the plurality of small holes is not less than the cross-sectional area of the drain pipe 4. The purpose of such a setting is to ensure that the condensed water flows down from the small holes in the form of fine water droplets or water columns, and the condensed water with a lower temperature on the low-pressure side is fully in contact with the steam on the high-pressure side, thereby increasing the temperature and reducing the degree of subcooling. The other components and connection methods are the same as those of the specific embodiments 1 or 2.
[0027] Specific implementation method four: Combination Figure 1 , Figure 3 and Figure 4 This embodiment is described. The difference between this embodiment and the specific embodiment 1 is that the number of the water spraying plates 9 is N, and the value range of N is 2 to 8. The number of the water spraying plates 9 is adaptively designed according to different working conditions to accommodate more equipment. The other components and connection methods are the same as any one of the specific embodiments 1 to 3.
[0028] Specific implementation method five: Combination Figure 1 , Figure 3 and Figure 4 This embodiment is described. The difference between this embodiment and the specific embodiment 1 is that the size of the false bottom plate 1 is the same as the cross-sectional area size of the inner wall of the low-pressure side of the condenser, and the false bottom plate 1 is welded to the inner wall of the low-pressure side of the condenser. The purpose of this arrangement is to make the condensate on the upper part of the low-pressure side of the condenser fall onto the false bottom plate 1 and all flow into the drain hole. The other components and connection methods are the same as any one of the specific embodiments 1 to 4.
[0029] Specific implementation method six: Combination Figure 1 , Figure 3 and Figure 4 This embodiment is described. The difference between this embodiment and the first embodiment is that the condensate outlet 11 is arranged at the bottom of the high pressure side of the condenser. The other components and connection methods are the same as any one of the first to fifth embodiments.
[0030] Specific implementation method seven: Combination Figure 1 , Figure 3 and Figure 4 This embodiment is described. The difference between this embodiment and the first embodiment is that the condensate outlet 11 is arranged at the bottom of the low-pressure side of the condenser. The condensate in the hot well on the high-pressure side can be transported to the space under the false bottom plate on the low-pressure side to increase the volume of the hot well, and finally the condensate flows out from the condensate outlet 11. The other components and connection methods are the same as any one of the first to sixth embodiments.
[0031] Specific implementation method eight: Combination Figure 2 This embodiment is described. The difference between this embodiment and the first embodiment is that baffles 10 are provided at both ends of the water spray plate 9 in the width direction. Such a setting is to ensure that the condensed water flows down from the small holes in the form of fine water droplets or water columns, and the condensed water with a lower temperature on the low-pressure side is fully in contact with the steam on the high-pressure side, thereby increasing the temperature and reducing the degree of supercooling. The other components and connection methods are the same as any one of the first to seventh embodiments.
[0032] Specific implementation method nine: Combination Figure 1 , Figure 3 and Figure 4This embodiment is described. The difference between this embodiment and the specific embodiment 1 is that it also includes a first compensation section 5 and a second compensation section 6. The first compensation section 5 is installed on the connecting pipe 7, and the second compensation section 5 is installed on the drain pipe 4. The purpose of such a setting is to compensate for the thermal displacement between the high-pressure side and the low-pressure side of the condenser. The other components and connection methods are the same as any one of the specific embodiments 1 to 8.
[0033] Combination Figures 1 to 4 Explain the working principle of the utility model:
[0034] The condensate on the upper part of the low-pressure side of the condenser falls onto the false bottom plate and all flows into the drain holes. The condensate in the condenser flows from the low-pressure side of the condenser to the high-pressure side of the condenser through the false bottom plate, drain riser, drain pipe, drain branch pipe and sprinkler tray in turn. The height dimension of the sprinkler tray is M lower than the height dimension of the false bottom plate, and M is not less than the water level height dimension corresponding to the pressure difference between the high-pressure side and the low-pressure side of the condenser, so as to ensure that the condensate can be effectively transported to the sprinkler tray. Baffles are provided at both ends of the sprinkler tray in the width direction so that the condensate flows down from the small holes in the form of fine water droplets or water columns. The condensate with lower temperature on the low-pressure side is fully in contact with the steam on the high-pressure side, thereby increasing the temperature and reducing the degree of subcooling.
[0035] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A built-in condensate heat recovery device for a double back-pressure condenser, characterized in that It comprises a condenser, a false bottom plate (1), a drain riser (2), a plugging plate (3), a drain pipe (4), a connecting pipe (7), a drain branch pipe (8), a water spraying plate (9) and a condensate outlet (11). The false bottom plate (1) is horizontally arranged at the lower part of the low-pressure side of the condenser. Two drain holes are vertically opened on the false bottom plate (1). The top surface of the drain riser (2) is connected to the drain holes. The drain pipe (4) is arranged at the lower part of the high-pressure side and the low-pressure side of the condenser. Plugging plates (3) are arranged at both ends of the drain pipe (4). The bottom surface of the drain riser (2) is connected to the top surface of the drain pipe (4). A drain pipe (4) on the high-pressure side of the steam generator is connected to drain branch pipes (8) on both sides, and a water spraying plate (9) is installed on the top surface of the drain branch pipe (8). A connecting pipe (7) is arranged between the high-pressure side and the low-pressure side of the condenser. The connecting pipe (7) is arranged outside the drain pipe (4). The connecting pipe (7) is used to connect the high-pressure side and the low-pressure side of the condenser. Condensate in the condenser flows from the low-pressure side of the condenser to the high-pressure side of the condenser through the false bottom plate (1), the drain riser (2), the drain pipe (4), the drain branch pipe (8) and the water spraying plate (9) in sequence. The condensate outlet (11) is arranged at the bottom of the condenser.
2. The built-in condensate heat recovery device of a double back-pressure condenser according to claim 1, characterized in that: The height of the water spray plate (9) is lower than that of the false bottom plate (1), and the height difference between the two is M, and M is not less than the water level height dimension corresponding to the pressure difference between the high-pressure side and the low-pressure side of the condenser, and the value range of M is 50 mm to 200 mm.
3. The built-in condensate heat recovery device of a double back-pressure condenser according to claim 1, characterized in that: The number of the water spraying plates (9) is N, the length of the water spraying plates (9) is the same as the length of the inner wall of the condenser, the width of the water spraying plates (9) is less than 1 / N of the width of the condenser, and a plurality of small holes are provided on the water spraying plates (9), and the total cross-sectional area of the plurality of small holes is not less than the cross-sectional area of the drain pipe (4).
4. A built-in condensate heat recovery device for a double back-pressure condenser according to any one of claims 1 to 3, characterized in that: The value range of N is 2 to 8.
5. The built-in condensate heat recovery device of a double back-pressure condenser according to claim 1, characterized in that: The size of the false bottom plate (1) is the same as the cross-sectional area size of the inner wall of the low-pressure side of the condenser, and the false bottom plate (1) is welded to the inner wall of the low-pressure side of the condenser.
6. The built-in condensate heat recovery device of a double back-pressure condenser according to claim 1, characterized in that: The condensate outlet (11) is arranged at the bottom of the high pressure side of the condenser.
7. The built-in condensate heat recovery device of a double back-pressure condenser according to claim 1, characterized in that: The condensate outlet (11) is arranged at the bottom of the low pressure side of the condenser.
8. The built-in condensate heat recovery device of a double back-pressure condenser according to claim 1, characterized in that: Baffles (10) are provided at both ends of the water spraying plate (9) in the width direction.
9. The built-in condensate heat recovery device of a double back-pressure condenser according to claim 1, characterized in that It also comprises a first compensation section (5) and a second compensation section (6), wherein the first compensation section (5) is installed on the connecting pipe (7), and the second compensation section (6) is installed on the drain pipe (4).