System for optimizing resistance of vacuumizing pipeline of direct air cooling unit
By optimizing the vacuum piping structure of the direct air-cooled unit, increasing the pipe diameter, and combining it with fluid dynamics calculations, the problem of high pipe resistance was solved, resulting in more efficient vacuuming and stable operation, reduced energy consumption, and extended equipment life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-27
- Publication Date
- 2026-04-10
AI Technical Summary
The vacuum piping of direct air-cooled units has high resistance. The conventionally designed pipe diameter is unreasonable, which causes steam to accumulate in the pipe, increasing flow resistance, reducing unit thermal efficiency, increasing energy consumption and shortening equipment life.
By optimizing the pipeline structure, increasing the diameter of the main vacuum pipeline, and calculating based on fluid mechanics principles, the gas velocity and local resistance are reduced. Welding or flange connections are used to ensure sealing, and the design of tees, elbows, and reducers is optimized.
It significantly reduces pipeline resistance, improves the efficiency of the vacuum system, enhances the unit's operating performance and economy, reduces equipment wear, and ensures stable operation.
Smart Images
Figure CN224108033U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the direct air cooling unit of thermal power plant technical field, especially relate to a direct air cooling unit vacuumizing pipeline resistance optimization system. BACKGROUND
[0002] In the thermal power field, direct air cooling unit is widely used by virtue of water saving advantage, and its vacuumizing system is the key to guarantee the efficient and stable operation of unit, maintains the vacuum state of condenser, ensures the effective condensation of steam and improves the thermal efficiency of unit.
[0003] At present, the vacuumizing pipeline of direct air cooling unit generally has the problem of large resistance, and the pipeline diameter of conventional design is unreasonable, which is difficult to meet the demand of steam rapid discharge under different working conditions, resulting in steam accumulation in the pipeline and increasing flow resistance, these problems not only reduce the overall thermal efficiency of unit and increase energy consumption, but also may cause equipment wear and tear to be intensified, shorten the service life and increase the maintenance cost.
[0004] With the continuous improvement of energy saving and emission reduction and equipment reliability requirements of electric power industry, it has become a key problem to be solved to develop an optimization structure capable of effectively reducing the resistance of vacuumizing pipeline of direct air cooling unit. UTILITY MODEL CONTENTS
[0005] The utility model discloses to the problem of the vacuumizing pipeline of direct air cooling unit in prior art generally having large resistance, the pipeline diameter of conventional design being unreasonable, which is difficult to meet the demand of steam rapid discharge under different working conditions, resulting in steam accumulation in the pipeline and increasing flow resistance, and proposes the following technical scheme:
[0006] A direct air cooling unit vacuumizing pipeline resistance optimization system, comprising:
[0007] Three groups of pipeline one are arranged for the main pipeline of the vacuumizing of air cooling unit.
[0008] The vacuumizing assembly comprises pipeline two, pipeline three, reducing pipe one, reducing pipe two, three-way pipe three and three-way pipe four, one end of the three-way pipe four is connected to one of the pipeline one, the other two ends of the three-way pipe four are connected with three-way pipe three through pipeline one, the pipeline two is connected to the three-way pipe three through the reducing pipe one, and two groups of the pipeline three are arranged.
[0009] As a preferred embodiment of the above technical scheme, the other end of the pipeline two is connected with three-way pipe two, and the other group of the pipeline three is connected to the three-way pipe two through reducing pipe three.
[0010] As the preferred technical scheme of the above, the other end of the two groups of the pipe three is connected with a three-way pipe one, and the other two ends of the two groups of the three-way pipe one are respectively connected with a pipe four and a reducing pipe four.
[0011] As the preferred technical scheme of the above, the number of the pipe four is eight groups, and the other end of the two groups of the pipe four connected with the reducing pipe four is connected with a pipe six.
[0012] As the preferred technical scheme of the above, the number of the pipe six is four groups, one end of the four groups of the pipe six is connected with the pipe four, and the other end is connected with a three-way pipe five.
[0013] As the preferred technical scheme of the above, one end of the four groups of the pipe four is connected with the three-way pipe five, the number of the three-way pipe five is eight groups, and the other two ends of the eight groups of the three-way pipe five are respectively connected with a pipe five and a reducing pipe five, and the other end of the eight groups of the reducing pipe five is connected with the pipe five.
[0014] The beneficial effects of the utility model are:
[0015] The utility model discloses an optimization design to pipe structure, significantly reduce pipe resistance, improve the pumping efficiency of vacuum system, and then promote the overall operation performance and economy of direct air cooling unit, ensure that unit can operate under the high -efficient, stable state. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 The whole structure schematic diagram in embodiment 1 is shown.
[0017] Figure 2 The structure schematic diagram in area A is shown. Figure 1
[0018] Figure 3 The structure schematic diagram in area B is shown. Figure 1
[0019] Figure 4 The structure schematic diagram in area C is shown. Figure 1
[0020] Figure 5 The structure schematic diagram in area D is shown. Figure 1
[0021] In the drawing: 1, pipe one;2, pipe two;3, pipe three;4, pipe four;5, pipe five;6, pipe six;7, reducing pipe one;8, reducing pipe two;9, reducing pipe three;10, reducing pipe four;11, reducing pipe five;12, three-way pipe one;13, three-way pipe two;14, three-way pipe three;15, three-way pipe four;16, three-way pipe five. Detailed Implementation
[0022] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.
[0023] Example 1
[0024] This invention provides an optimization system for the resistance of the vacuum piping in a direct air-cooled unit, such as... Figures 1 to 5 As shown, the optimization system for the vacuum piping resistance of the direct air-cooled unit includes pipe 1 and a vacuum assembly. Pipe 1 consists of three sets, serving as the main piping for vacuuming the air-cooled unit. The vacuum assembly includes pipe 2, pipe 3, reducer 7, reducer 8, tee 3 14, and tee 4 15. Tee 4 15 connects to the end of one set of pipe 1, as shown... Figure 1 As shown, there is one tee pipe 4 15; the other two ends of the tee pipe 4 15 are connected to tee pipe 3 14 through pipe 1, and there are three sets of tee pipe 3 14. Figure 1 and Figure 3 As shown, Figure 1 The three ends of the tee pipe 314 marked in the figure are connected to reducer 7, pipe 4 and pipe 1 respectively; Figure 3 The tee pipe 314 shown is marked in two sets. The opposite ends of the two sets of tee pipe 314 are connected to each other. The other two ends of one set of tee pipe 314 are connected to pipe 1 and pipe 4 respectively. The other two ends of the other set of tee pipe 314 are connected to pipe 4 and reducer 2 8 respectively.
[0025] Pipe 2 is connected to tee 3 14 via reducer 7, and there is one set of pipe 2. The other end of pipe 2 is connected to tee 2 13. There are two sets of pipe 3, one set of which is connected to tee 3 14 via reducer 8. Figure 3 As shown; another set of pipes, 3, is connected to tee pipe 2, 13 via reducer 3, as shown. Figure 1 and Figure 4 As shown; the other end of each of the two sets of pipes 3 is connected to a tee pipe 12, and the other two ends of each of the two sets of tee pipes 12 are respectively connected to pipe 4 and reducer 4 10.
[0026] In this embodiment, there are a total of eight sets of pipes 4. Among them, the other end of the two sets of pipes 4 connected to the reducer 4 10 is connected to pipe 6. There are a total of four sets of pipes 6. One end of each of the four sets of pipes 6 is connected to pipe 4, and the other end of each of the four sets of pipes 6 is connected to tee pipe 5 16.
[0027] Four of the eight groups of pipeline four 4 are directly connected with three-way pipe five 16, and the number of three-way pipe five 16 is eight groups; the other two ends of the eight groups of three-way pipe five 16 are respectively connected with pipeline five 5 and reducing pipe five 11, wherein the other end of the eight groups of reducing pipe five 11 is connected with pipeline five 5, that is, the number of pipeline five 5 is sixteen groups in this embodiment.
[0028] Specifically, the specifications of all the above-mentioned pipelines are as follows:
[0029] Pipeline one 1 is Φ426, pipeline two 2 is Φ325, pipeline three 3 is Φ273, pipeline four 4 is Φ219, pipeline five 5 is Φ108, and pipeline six 6 is Φ219 elbow;
[0030] Reducing pipe one 7 is Φ426×325 reducing pipe, reducing pipe two 8 is Φ426×273 reducing pipe, reducing pipe three 9 is Φ325×273 reducing pipe, reducing pipe four 10 is Φ273×219 reducing pipe, and reducing pipe five 11 is Φ219×108 reducing pipe;
[0031] Three-way pipe one 12 is Φ219×273 three-way pipe, three-way pipe two 13 is Φ219×325 three-way pipe, three-way pipe three 14 is Φ219×426 three-way pipe, three-way pipe four 15 is Φ426×426 three-way pipe, and three-way pipe five 16 is Φ108×219 three-way pipe.
[0032] Among them, Φ represents the diameter of each pipeline; reducing pipe is also called reducer or reducing straight pipe, for example, reducing pipe one 7 is Φ426×325 reducing pipe, which means that one end has a diameter of 426 mm and the other end has a diameter of 325 mm.
[0033] Working principle: In the reconstruction of the existing direct air cooling unit vacuum system, according to the actual operation condition and air extraction demand of the direct air cooling unit, the fluid mechanics principle is used to accurately calculate and optimize the pipe diameter of the vacuum extraction pipeline, increase the pipe diameter of the main vacuum extraction pipeline, reduce the flow velocity of the gas in the pipeline, and thus reduce the resistance along the way; for example, the original pipe diameter of the main vacuum extraction pipeline is increased from DN300 to DN350, under the same working condition, the gas flow velocity is reduced from 15 m / s to 12 m / s, according to the Darcy formula calculation, the resistance coefficient along the way is reduced by about 20%, after adjusting the pipe diameter of the vacuum extraction pipeline, the key local resistance coefficients of the three-way pipe, elbow and reducer are correspondingly reduced, so the local resistance of the pipeline is also reduced, which effectively reduces the energy loss.
[0034] Replace the original Φ159 with pipeline four 4Φ219, replace the original Φ219 with pipeline three 3Φ273, replace the original Φ273 with pipeline two 2Φ325, replace the original Φ325 close to the two ends of the main pipe with pipeline one 1Φ426; Replace the elbow Φ159 with pipeline six 6Φ219 elbow, replace the original Φ159*219 reducing pipe with reducing pipe four 10Φ219*273 reducing pipe, replace the original Φ219*273 reducing pipe with reducing pipe three 9Φ325*273 reducing pipe, replace the original Φ325*273 reducing pipe with reducing pipe one 7Φ426*325 reducing pipe, replace the original Φ426*325 reducing pipe with reducing pipe two 8Φ426*273 reducing pipe, replace the original Φ108*159 reducing pipe with reducing pipe five 11Φ219*108 reducing pipe, replace the original Φ159*219 tee with tee pipe one 12Φ219*273 tee, replace the original Φ159*273 tee with tee pipe two 13Φ219*325 tee, replace the original Φ159*325 tee with tee pipe three 14Φ219*426 tee, replace the original Φ108*159 tee with tee pipe five 16Φ108*219 tee;
[0035] During the replacement process, the connection mode between the pipelines is welded or flanged, which ensures the sealing and firmness of the pipeline connection, and the pipeline is strictly sealed and protected;
[0036] After the redesign of the vacuum extraction pipeline, the resistance along the pipeline is reduced, compared with the original pipeline, two reducing pipes are reduced, the diameter change ratio of the remaining reducing pipes is reduced, the diameter ratio of the branch pipe to the main pipe of the tee is increased, the local resistance is reduced, so the total resistance of the direct air cooling unit vacuum extraction pipeline is reduced.
[0037] Through the above specific embodiments, the direct air cooling unit vacuum extraction pipeline resistance optimization structure is realized, and good results have been achieved in actual operation. The gas flow in the pipeline is more stable, the vibration and noise caused by unstable airflow are reduced, the impact on the pipeline and equipment is reduced, the stability of the entire vacuum extraction system and the direct air cooling unit is improved, the probability of equipment failure is reduced, the safety and continuity of power production are ensured, and the performance of the direct air cooling unit vacuum extraction system and the overall operation efficiency of the unit are effectively improved.
[0038] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them.
Claims
1. An optimization system for direct air-cooling unit vacuum extraction pipeline resistance, characterized in that, It includes: Pipe one (1), a total of three groups are provided, for air cooling unit main pipeline of vacuumizing; Vacuumizing assembly, including pipe two (2), pipe three (3), reducing pipe one (7), reducing pipe two (8), tee pipe three (14) and tee pipe four (15), the tee pipe four (15) is connected to the end of one of the pipe one (1), the other two ends of the tee pipe four (15) are connected with tee pipe three (14) through pipe one (1), the pipe two (2) is connected to the tee pipe three (14) through the reducing pipe one (7), the number of pipe three (3) is provided with two groups, one of the pipe three (3) is connected to the tee pipe three (14) through reducing pipe two (8).
2. The system for optimizing the resistance of the vacuuming pipeline of a direct air cooling unit according to claim 1, characterized in that, The other end of the pipe two (2) is connected with tee pipe two (13), and the other group of pipe three (3) is connected to the tee pipe two (13) through reducing pipe three (9).
3. The system for optimizing the resistance of the vacuuming pipeline of a direct air cooling unit according to claim 1, characterized in that, The other end of the pipe three (3) is connected with tee pipe one (12), and the other end of the pipe three (3) is connected with tee pipe one (12), and the other end of the pipe three (3) is connected with tee pipe one (12).
4. The system for optimizing the resistance of the vacuuming pipeline of a direct air cooling unit according to claim 3, characterized in that, The number of pipe four (4) is provided with eight groups, wherein the other end of two groups of pipe four (4) connected to the reducing pipe four (10) is connected with pipe six (6).
5. The system for optimizing the resistance of the vacuuming pipeline of a direct air cooling unit according to claim 4, characterized in that, The number of pipe six (6) is provided with four groups, one end of four groups of pipe six (6) is connected to the pipe four (4), and the other end is connected to tee pipe five (16).
6. The system for optimizing the resistance of the vacuuming pipeline of a direct air cooling unit according to claim 5, wherein, One end of four groups of pipe four (4) is connected to the tee pipe five (16), the number of tee pipe five (16) is provided with eight groups, and the other two ends of eight groups of tee pipe five (16) are respectively connected with pipe five (5) and reducing pipe five (11), wherein the other end of eight groups of reducing pipe five (11) is connected with the pipe five (5).