Air cooling island antifreeze flow control system
A technology of flow control and air-cooled islands, which is applied in heating systems, space heating and ventilation, steam/steam condensers, etc., can solve the problems of low-pressure cylinder exhaust steam not being able to supply heating condensers, energy waste, etc., to achieve Excellent economic benefit and simple structure
Active Publication Date: 2018-08-07
SHANDONG HONGAO POWER TECHNOLOGY CO LTD +1
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Problems solved by technology
[0008] When the air-cooling unit is retrofitted with high back pressure circulating water heating and energy saving, relying only on traditional protective measures, a large amount of exhaust steam from the low-pressure cylinder of the unit will enter the air-cooling island, which will cause a great waste of energy. However, due to the actual heating load and the heating network cycle Influenced by factors such as water pipelines, power generation load, and the first heating station, the exhaust steam of the low-pressure cylinder of the unit during the heating period cannot be completely recovered by the heating condenser
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[0020] Accompanying drawing is a kind of specific embodiment of the present invention. This embodiment includes six rows of parallel air-cooled islands 2 connected to the steam device 1, of which two rows of air-cooled islands 2 are reserved for exhaust steam, and the remaining four rows of air-cooled islands 2 are all closed, and the air-cooled islands 2 are provided with large steam inlet butterfly valves 3, Three kinds of bypasses with different pipe diameters are arranged on the reserved air-cooling islands 2 of the two columns, namely, bypass A4, bypass B5 and bypass C6, and valves 7 are arranged on the above-mentioned bypasses; the pipes of the bypass A4 The diameter of the bypass B5 is Φ219×6mm, the diameter of the bypass B5 is Φ273×5mm, and the diameter of the bypass C6 is Φ457×7mm; the diameter of the steam inlet butterfly valve 3 is DN2600mm.
[0021] According to the design characteristics of the air-cooling unit, after the analysis and calculation of the air-coolin...
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The invention relates to the field of antifreeze technology for air-cooled islands, in particular to an antifreeze flow control system for air-cooled islands. The air-cooling island antifreeze flow control system includes six parallel air-cooling islands connected to steam devices, two of which are reserved for exhaust steam, and the remaining four air-cooling islands are all closed. For the large butterfly valve, three bypasses with different pipe diameters are set on the two reserved air-cooling islands, namely bypass A, bypass B and bypass C, and valves are set on the above bypasses. The invention has a simple structure, can ensure that the reserved air-cooling island meets the anti-freezing requirements of -30°C, and utilizes as much waste heat as possible from exhaust steam of the unit, recovers the loss of cold source, and achieves the purpose of reducing the coal consumption of the unit for power generation and increasing the heat supply capacity. Superior economic benefits.
Description
(1) Technical field [0001] The invention relates to the field of antifreeze technology for air-cooled islands, in particular to an antifreeze flow control system for air-cooled islands. (2) Background technology [0002] When the air-cooled unit operates at an ambient temperature below 0°C in winter, the air-cooled island is prone to freezing failures, especially during the start-up and shutdown stages of the unit and the low-load operation period of the unit. During operation, corresponding measures must be formulated for various harsh operating conditions of the unit in winter to prevent the air-cooled island from freezing. [0003] For air-cooled units operating in pure condensing mode, the following anti-freezing measures are basically used during normal operation in cold winter weather: [0004] (1) The exhaust pressure of the unit should not be lower than 13kPa. During normal operation, the air-cooling fan should be put into automatic control, and pay attention to the...
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IPC IPC(8): F28B9/00F28B11/00F24D19/10
CPCF24D19/1003F28B9/005F28B11/00
Inventor 周国锋丁志波宋艳峰梁建军李锦青周桥刘广梁李兆峰
Owner SHANDONG HONGAO POWER TECHNOLOGY CO LTD