CN213363450U - Energy-saving system for intelligent pressure regulation and optimized heat exchange of direct air cooling - Google Patents
Energy-saving system for intelligent pressure regulation and optimized heat exchange of direct air cooling Download PDFInfo
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- CN213363450U CN213363450U CN202022304849.1U CN202022304849U CN213363450U CN 213363450 U CN213363450 U CN 213363450U CN 202022304849 U CN202022304849 U CN 202022304849U CN 213363450 U CN213363450 U CN 213363450U
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Abstract
The utility model discloses an energy-saving system for intelligent pressure regulation and optimized heat exchange by direct air cooling, which is provided with an exhaust pipeline, and comprises a downstream pipe bundle, a counter-current pipe bundle, a steam extraction pipeline, a chemical water replenishing tank and a jet entrainment dynamic mixer; one end of the downstream pipe bundle is connected with an exhaust pipeline, and the other end of the downstream pipe bundle is communicated with a condensation water tank through a condensation water collecting pipeline; the device comprises a condensation water tank, a chemical water supplementing tank, a jet flow entrainment dynamic mixer, a reflux pipeline, a reflux pipe bundle, a condensation water tank, a vacuumizing device and a steam exhaust pipeline, wherein the condensation water tank is provided with an air chamber, the top of the air chamber is communicated with the jet flow entrainment dynamic mixer through the steam exhaust pipeline, the chemical water supplementing tank is communicated with the jet flow entrainment dynamic mixer through the cooling water pipeline, the jet flow entrainment dynamic mixer is communicated with the reflux pipe bundle through the reflux pipeline, the reflux pipe bundle is communicated with the. The utility model discloses take away the noncondensable gas of easy gathering in the air cooling island in the same direction as flow tube bundle, when the interior steam of tube bank flows with higher speed, avoids freezing, reduce the backpressure of direct air cooling system, improve the heat transfer homogeneity and the work efficiency on air cooling island.
Description
Technical Field
The utility model belongs to the technical field of environmental protection and energy saving, concretely relates to energy-saving system of direct air cooling intelligence pressure regulating and optimization heat transfer.
Background
In a direct air cooling power plant constructed in the northern 'coal-rich and water-deficient' area, an air cooling system is easy to have the phenomenon of frost cracking of a heat transfer pipe bundle in severe cold weather in winter. At present, although the concurrent tube bundle of the air-cooled condenser is a main part for condensing steam, most of steam can be condensed, and air and non-condensed gas in a system are discharged through the countercurrent tube bundle of the air-cooled condenser. However, due to the reasons of uneven distribution of steam flow of each tube row of the heat transfer tube bundle, uneven distribution of air volume of each fan unit (large air volume in the middle of the fan unit, small air volume at the partition walls at two sides) and the like, the lower part of the downstream tube bundle of the air-cooling condenser can form a low-pressure area during operation, so that non-condensed gas is gathered at the low-pressure area, high back pressure is caused by influencing heat exchange of an air-cooling island in summer, the tube bundle is easy to freeze in winter, so that a circulation channel in the tube is blocked, even the tube bundle.
Disclosure of Invention
The utility model aims to take out the noncondensable gas of easy gathering in the air cooling island in the same direction as flow tube bundle, when the interior steam of tube bundle flows, avoids freezing with higher speed, reduces the backpressure of direct air cooling system, improves the heat transfer homogeneity and the work efficiency in air cooling island.
In order to solve the technical problem, the utility model relates to a direct air cooling intelligence pressure regulating and economizer system who optimizes the heat transfer is equipped with exhaust duct 1, its characterized in that: comprises a downstream pipe bundle 3, a counter-flow pipe bundle 4, a steam extraction pipeline 7, a chemical makeup water tank 5 and a jet flow entrainment dynamic mixer 8; one end of the downstream tube bundle 3 is connected with the exhaust pipeline 1, and the other end is communicated with the condensation water tank 13 through a condensation water collecting pipeline 17; the condensation water tank 13 is provided with an air chamber 16, the top of the air chamber 16 is communicated with a jet flow entrainment dynamic mixer 8 through an air extraction pipeline 7, the chemical water replenishing tank 5 is communicated with the jet flow entrainment dynamic mixer 8 through a cooling water pipeline 6, the jet flow entrainment dynamic mixer 8 is communicated with a counter-flow tube bundle 4 through a backflow pipeline 9, the counter-flow tube bundle 4 is communicated with the condensation water tank 13, and the other end of the counter-flow tube bundle is connected with a vacuumizing device 11 through a vacuumizing pipeline 10.
The further design is that: the downstream tube bundle 3 is communicated with the exhaust pipeline 1 through a steam distribution pipe 2, and a steam distribution pipe regulating valve 14 is arranged on the steam distribution pipe 2.
The further design is that: the jet flow entrainment dynamic mixer 8 is connected with the chemical water replenishing tank 5 through a cooling water pipeline 6, and a cooling water regulating valve 15 and a cooling water manual valve 18 are arranged on the cooling water pipeline 6.
The further design is that: the variable frequency fan 12 is respectively positioned between the downstream tube bundles 3 and the upstream tube bundles 4 on the two sides; temperature measuring elements 19 are arranged at the inlet and outlet of the downstream tube bundle 3 and the upstream tube bundle 4, the output ends of the temperature measuring elements 19 are respectively connected with the input end of the DCS, and the output ends of the DCS are respectively correspondingly connected with the control ends of the variable frequency fan 12, the cooling water regulating valve 15 and the steam distribution pipe regulating valve 14.
The further design is that: a negative pressure measuring element 20 is arranged below the downstream tube bundle 3, the output end of the negative pressure measuring element 20 is respectively connected with the input end of the DCS, and the output end of the DCS is respectively and correspondingly connected with the control ends of the variable frequency fan 12, the cooling water regulating valve 15 and the steam distribution pipe regulating valve 14.
The utility model discloses establish the model of direct air cooling system, 19 and the negative pressure measurement element 20's of each temperature measurement element of intelligent analysis feedback signal, wisdom historical operating data realize automatically regulated steam distribution volume, cooling water yield and air supply output through DCS, optimize the heat transfer effect of each heat exchanger tube bank in order to reduce the unit backpressure.
The utility model discloses a DCS system realizes the intelligent PID automatically regulated based on model prediction, controls the aperture automatically regulated cooling water yield of cooling water governing valve 15, controls the aperture automatically regulated steam distribution flow of steam distribution pipe governing valve 14, controls the rotational speed automatically regulated air supply volume of variable frequency fan 12.
After the technical scheme is adopted, the utility model provides a direct air cooling intelligence pressure regulating and expert economizer system who optimizes the heat transfer has avoided because the tube bank windward side wind speed difference is big, arouses that heat transfer tube bank heat transfer volume is uneven, the resistance is uneven in the tube bank, leads to forming the low-pressure area in the tube bank and gathers a large amount of noncondensable gas, and then leads to intraductal circulation passageway to block up the condition emergence of freezing even. The system improves the heat exchange uniformity and the working efficiency of the whole air cooling island, and has the advantages of backpressure reduction in summer, freezing prevention in winter, automatic adjustment, simplicity in operation and low cost.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the measuring point of the present invention;
wherein: 1. the system comprises an exhaust pipeline, 2, a steam distribution pipe, 3, a downstream pipe bundle, 4, a counter-flow pipe bundle, 5, a chemical water supplementing tank, 6, a cooling water pipeline, 7, a steam extraction pipeline, 8, a jet flow entrainment dynamic mixer, 9, a return pipeline, 10, a vacuumizing pipeline, 11, vacuumizing equipment, 12, a variable frequency fan, 13, a condensation water tank, 14, a steam distribution pipe regulating valve, 15, a cooling water regulating valve, 16, an air chamber, 17, a condensation water collecting pipeline, 18, a cooling water manual valve, 19, a temperature measuring element, 20 and a negative pressure measuring element.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-2, the utility model provides an energy-saving system for direct air cooling intelligent pressure regulation and optimized heat exchange, which is provided with an exhaust pipeline 1, comprising a downstream pipe bundle 3, a counter-flow pipe bundle 4, a steam extraction pipeline 7, a chemical makeup water tank 5 and a jet entrainment dynamic mixer 8; one end of the downstream tube bundle 3 is connected with the exhaust pipeline 1, and the other end is communicated with the condensation water tank 13 through a condensation water collecting pipeline 17; the condensation water tank 13 is provided with a gas chamber 16, the top of the gas chamber 16 is communicated with a jet flow entrainment dynamic mixer 8 through a gas extraction pipeline 7, the chemical water replenishing tank 5 is communicated with the jet flow entrainment dynamic mixer 8 through a cooling water pipeline 6, the jet flow entrainment dynamic mixer 8 is communicated with a countercurrent tube bundle 4 through a backflow pipeline 9, a gas-steam mixture consisting of non-condensation gas and partial steam gathered at the lower part of the concurrent tube bundle 3 is extracted through the jet flow entrainment dynamic mixer 8, the cooling water condenses partial steam, the formed gas-water mixture is sent into the countercurrent tube bundle 4, the condensation water and the cooling water flow back into a condensation water collecting pipeline 17, and the non-condensation gas continues to be extracted through the original vacuumizing pipeline 10 by a vacuumizing device 11; cooling water is injected into the jet entrainment dynamic mixer 8 in a jet entrainment mode, and the jet entrainment forms partial vacuum to suck a gas-steam mixture consisting of non-condensable gas and partial steam gathered at the lower part of the concurrent tube bundle 3; the countercurrent tube bundle 4 is communicated with a condensation water tank 13, and the other end of the countercurrent tube bundle is connected with a vacuumizing device 11 through a vacuumizing pipeline 10.
The further design is that: the downstream tube bundle 3 is communicated with the exhaust pipeline 1 through a steam distribution pipe 2, and a steam distribution pipe regulating valve 14 is arranged on the steam distribution pipe 2.
The further design is that: the jet flow entrainment dynamic mixer 8 is connected with the chemical water replenishing tank 5 through a cooling water pipeline 6, and a cooling water regulating valve 15 and a cooling water manual valve 18 are arranged on the cooling water pipeline 6.
The further design is that: temperature measuring elements 19 are arranged at the inlets and outlets of the downstream tube bundles 3 and the counter-flow tube bundles 4 on the two sides of the variable frequency fan 12, negative pressure measuring elements 20 are arranged at the lower parts of the downstream tube bundles 3 on the two sides of the variable frequency fan 12, the output ends of the temperature measuring elements 19 and the negative pressure measuring elements 20 are respectively connected with the input end of the DCS, and the output end of the DCS is respectively and correspondingly connected with the control ends of the variable frequency fan 12, the cooling water regulating valve 15 and the steam distribution pipe regulating valve 14; the temperature measuring element 19 is a temperature sensor for measuring the temperature of each heat exchange tube bundle; the negative pressure measuring element 20 is a negative pressure sensor for measuring the pressure of each heat exchange tube bundle; the DCS regulates and controls the operation of the whole direct air cooling system by monitoring the temperature of each heat exchange tube bundle; when the temperature and the pressure of a certain heat exchange tube bundle exceed preset values, the DCS performs intelligent PID automatic adjustment based on model prediction on the variable frequency fan 12, the cooling water adjusting valve 15 and the steam distribution pipe adjusting valve 14 corresponding to the heat exchange tube bundle according to conditions so as to optimize heat exchange.
The utility model has the advantages that:
1. the heat exchange tube bundle heat exchange system realizes the refined and intelligent operation control of the heat exchange tube bundles, integrates measurement signals when the unit operates normally, and intelligently analyzes the heat exchange condition of each tube bundle through an established direct air cooling system model by an expert energy-saving system:
2. for the heat exchange tube bundle with the temperature and the back pressure lower than the average value, increasing the steam inlet amount or reducing the rotating speed of the variable frequency fan by increasing the opening of the steam distribution pipe regulating valve; for the heat exchange tube bundle with the temperature and the back pressure higher than the average value, the opening of a steam distribution pipe regulating valve is reduced, the steam inlet quantity is reduced or the rotating speed of a variable frequency fan is increased;
3. the heat exchange effect of each tube bundle of the unit is optimized, and the economy of the unit is improved; when the unit runs in winter, the expert energy-saving system can adjust the rotating speed of the corresponding variable-frequency fan in time according to the temperature and pressure changes of the inlet and the outlet of each heat exchange tube bundle, or extract non-condensable gas accumulated in the heat exchange tube bundles in time, so that the whole air cooling system is comprehensively monitored, and the freezing phenomenon is prevented.
The above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and for those skilled in the art, it is possible to make several modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all belong to the protection scope of the present application.
Claims (5)
1. The utility model provides an economizer system of direct air cooling intelligence pressure regulating and optimization heat transfer is equipped with exhaust duct (1), its characterized in that: comprises a downstream pipe bundle (3), a counter-current pipe bundle (4), a steam extraction pipeline (7), a chemical water replenishing tank (5) and a jet flow entrainment dynamic mixer (8); one end of the downstream tube bundle (3) is connected with the exhaust pipeline (1), and the other end of the downstream tube bundle is communicated with the condensed water tank (13) through a condensed water collecting pipeline (17); be equipped with air chamber (16) on condensate tank (13), air chamber (16) top is linked together through steam extraction pipeline (7) and efflux entrainment dynamic mixer (8), and change moisturizing case (5) are linked together through cooling water piping (6) and efflux entrainment dynamic mixer (8), and efflux entrainment dynamic mixer (8) are linked together through backflow pipeline (9) and countercurrent tube bank (4), countercurrent tube bank (4) are linked together with condensate tank (13), and the other end is connected with evacuating device (11) through evacuation pipeline (10).
2. The energy-saving system for intelligent pressure regulation and optimized heat exchange of direct air cooling according to claim 1, characterized in that: the concurrent flow tube bundle (3) is communicated with the exhaust pipeline (1) through a steam distribution pipe (2), and a steam distribution pipe regulating valve (14) is arranged on the steam distribution pipe (2).
3. The energy-saving system for intelligent pressure regulation and optimized heat exchange of direct air cooling according to claim 1, characterized in that: the jet flow entrainment dynamic mixer (8) is connected with the chemical water replenishing tank (5) through a cooling water pipeline (6), and a cooling water regulating valve (15) and a cooling water manual valve (18) are arranged on the cooling water pipeline (6).
4. The energy-saving system for intelligent pressure regulation and optimized heat exchange of direct air cooling according to claim 1, characterized in that: the variable-frequency fan (12) is respectively positioned between the downstream tube bundles (3) on the two sides and the upstream tube bundles (4) on the two sides; temperature measuring elements (19) are arranged at the inlet and outlet of the downstream tube bundle (3) and the upstream tube bundle (4), the output ends of the temperature measuring elements (19) are respectively connected with the input end of the DCS, and the output end of the DCS is respectively correspondingly connected with the control ends of the variable frequency fan (12), the cooling water regulating valve (15) and the steam distribution pipe regulating valve (14).
5. The energy-saving system for intelligent pressure regulation and optimized heat exchange of direct air cooling according to claim 1, characterized in that: and a negative pressure measuring element (20) is arranged below the downstream tube bundle (3), the output end of the negative pressure measuring element (20) is respectively connected with the input end of the DCS, and the output end of the DCS is respectively and correspondingly connected with the control ends of the variable frequency fan (12), the cooling water regulating valve (15) and the steam distribution pipe regulating valve (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022304849.1U CN213363450U (en) | 2020-10-16 | 2020-10-16 | Energy-saving system for intelligent pressure regulation and optimized heat exchange of direct air cooling |
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| CN202022304849.1U CN213363450U (en) | 2020-10-16 | 2020-10-16 | Energy-saving system for intelligent pressure regulation and optimized heat exchange of direct air cooling |
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| CN213363450U true CN213363450U (en) | 2021-06-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113945100A (en) * | 2021-09-18 | 2022-01-18 | 中国大唐集团科学技术研究院有限公司西北电力试验研究院 | Device for adjusting homogenization of flow field and temperature field of air cooling radiator for air cooling unit |
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2020
- 2020-10-16 CN CN202022304849.1U patent/CN213363450U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113945100A (en) * | 2021-09-18 | 2022-01-18 | 中国大唐集团科学技术研究院有限公司西北电力试验研究院 | Device for adjusting homogenization of flow field and temperature field of air cooling radiator for air cooling unit |
| CN113945100B (en) * | 2021-09-18 | 2024-02-20 | 中国大唐集团科学技术研究院有限公司西北电力试验研究院 | Device for adjusting flow field and temperature field homogenization of air cooling radiator for air cooling unit |
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