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Tube layout structure of U-type condenser

A condenser and tube layout technology, which is applied in the field of U-shaped condenser tube layout, can solve the problems of poor heat transfer performance of tube bundles and small number of tubes, and achieve the effect of reducing pressure drop and reducing investment

Pending Publication Date: 2018-09-21
HARBIN TURBINE AUX EQUIP ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of the bottom-in and top-out type circulating water flow in the unit, the present invention has the same pipe layout range, the number of pipes is small, and the heat transfer performance of the tube bundle is poor.

Method used

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  • Tube layout structure of U-type condenser
  • Tube layout structure of U-type condenser
  • Tube layout structure of U-type condenser

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0011] Specific implementation mode one: combine figure 1 and image 3 Describe this embodiment, a U-shaped condenser tube arrangement structure, which includes a tube plate 1, a gas baffle plate 5, and a cooling tube 7; multiple cooling tubes 7 are arranged on the tube plate 1, and multiple cooling tubes 7 are arranged in parallel Constitute the tube bundle 9 in the upper semi-condensation zone, the tube bundle 10 in the lower semi-condensation zone and the tube bundle 4 in the air-cooling zone;

[0012] The tube bundle 4 in the air-cooling zone is arranged at the lower part of the tube bundle 9 in the upper semi-condensing zone, on the tube sheet 1 between the tube bundle 9 in the upper semi-condensing zone and the tube bundle 4 in the air-cooling zone, and between the tube bundle 9 in the upper semi-condensing zone and the tube bundle 10 in the lower semi-condensing zone A gas baffle 5 is arranged on the tube sheet 1;

[0013] The outer edge of the tube bundle 9 in the up...

specific Embodiment approach 2

[0017] Specific implementation mode two: combination figure 1 and image 3 To illustrate this embodiment, the tube bundle 9 in the upper semi-condensation zone is arranged in a symmetrical trapezoid, the angle α of the upper trapezoid of the tube bundle 9 in the upper semi-condensation zone is greater than the angle β of the trapezoid in the lower part of the tube bundle 9 in the upper semi-condensation zone, and the upper steam channel 3-1 changes from narrow to wide , the initial width of the upper steam channel 3-1 is 1 row of cooling pipes 7, gradually becomes 2 rows, and finally becomes 3 rows. The beneficial effect of this embodiment: it can form a clear steam inlet channel and exhaust steam channel, each stream of steam from the steam inlet channel passes through the tube bundle strip to basically complete the condensation task, and the remaining steam-gas mixture flows along the exhaust steam channel to the air cooling area, When designing, the strip should not be too...

specific Embodiment approach 3

[0018] Specific implementation mode three: combination figure 1 To illustrate this embodiment, the tube bundles 10 in the lower semi-condensation zone are distributed in a strip shape, the width of the lower steam channel 3-2 gradually increases from one row of cooling tubes 7, and the width of the lower steam channel 3-2 on the bottom side of the trapezoid remains unchanged. The beneficial effect of this embodiment: more tube bundles can be arranged, the flow performance of the circulating water is good, and the heat transfer end of the lower part of the water is relatively large. Others are the same as in the first embodiment.

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Abstract

The invention discloses a tube layout structure of a U-type condenser, and aims to solve performance problems of the condenser in a top-in bottom-out circulating water flowing mode in a machine set that the number of distributed tubes is less within the same tube distribution range and the heat conductivity of a tube bundle is poor. The tube layout structure comprises a tube plate, air baffles andcooling tubes. Multiple cooling tubes are arranged on the tube plate. The multiple cooling tubes are parallelly arranged to form an upper half condensing region tube bundle, a lower half condensing region tube bundle and an air cooling region tube bundle. The air cooling region tube bundle is arranged at the lower part of the upper half condensing region tube bundle. The tube plate between the upper half condensing region tube bundle and the air cooling region tube bundle, and the tube plate between upper half condensing region tube bundle and the lower half condensing region tube bundle areprovided with the air baffles. The outer edge of the upper half condensing region tube bundle is provided with multiple upper steam channels which are slantwise upwards enlarged gradually from insideto outside. The outer edge of the lower half condensing region tube bundle is provided with multiple lower steam channels formed by communicating horizontal and slantwise channels. The tube layout structure is used for conducting heat in the condenser.

Description

technical field [0001] The invention relates to a pipe layout structure of a U-shaped condenser. Background technique [0002] At present, the commonly used tube bundle types include centripetal tube bundles arranged in peripheral bands, U-shaped and UT-shaped. A special air cooling area is generally provided for the strip tube bundle, and a large number of various deflectors are installed in the strip tube bundle. The centripetal tube bundle type is the banded tube bundle around the double-flow condenser of Baosteel's own 350MW unit imported from Japan. The UT-type tube bundle has many steam channels. Compared with the centripetal tube bundle, the UT-type steam channel is longer and the steam resistance is higher. Large, but the heat transfer performance is better, and the heat load is evenly distributed. The tube bundle is arranged in double flow, and the circulating cooling water flow mode: bottom in and top out. Contents of the invention [0003] The present inventi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28B1/02
CPCF28B1/02
Inventor 刘克为赵云云张晨崔艳艳薛英喜洪增元
Owner HARBIN TURBINE AUX EQUIP ENG