CN111854460A

CN111854460A - Air exhaust structure applied to axial exhaust type condenser

Info

Publication number: CN111854460A
Application number: CN202010609426.2A
Authority: CN
Inventors: 杨龙; 彭军华; 张国洋; 李子钧; 楼滉
Original assignee: Hangzhou Guoneng Steam Turbine Engineering Co Ltd
Current assignee: Hangzhou Guoneng Steam Turbine Engineering Co Ltd
Priority date: 2020-06-29
Filing date: 2020-06-29
Publication date: 2020-10-30

Abstract

The invention provides an air extraction structure applied to an axial exhaust type condenser, which comprises an air extraction main pipe and a communicating branch pipe, wherein the communicating branch pipe is arranged on the air extraction main pipe and is communicated with the air extraction main pipe, the communicating branch pipe is communicated with an air extraction opening on a condenser shell, and the air extraction main pipe is positioned at the far end of the exhaust side of a cooling pipe bundle area and is symmetrically arranged about the central axis of a steam inlet. The invention shortens the path of the non-condensable gas in the air extraction pipeline, thereby reducing the vapor resistance of the non-condensable gas and achieving the effect of optimizing the heat exchange effect.

Description

Air exhaust structure applied to axial exhaust type condenser

Technical Field

The invention relates to the technical field of axial exhaust type condensers, in particular to an air extraction structure applied to an axial exhaust type condenser.

Background

The air exhaust structure of the present axial exhaust type condenser is roughly divided into two types: centripetal air extraction and air extraction at the lower end of the tube bundle correspond to the water chamber structures divided into an upper half and a lower half and a left half respectively, but the two air extraction structures have defects, as shown in fig. 1, the centripetal air extraction structure has no obvious air cooling area, so that a steam baffle plate 2 is usually arranged on an air extraction pipeline in order to prevent short circuit of steam flow when the tube bundle is arranged, but more tube distribution areas are occupied, and the device is relatively uneconomical; as shown in fig. 2, although the air-extracting structure at the lower end of the tube bundle has an air-cooling zone 3, the air at the upper end of the tube bundle is difficult to extract, and the heat exchange effect of the tube bundle is indirectly influenced, thereby influencing the vacuum index of the whole condenser.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide the air extraction structure applied to the axial exhaust type condenser, and the path of the non-condensable gas in an air extraction pipeline is shortened, so that the vapor resistance of the non-condensable gas is reduced, and the effect of optimizing the heat exchange effect is achieved.

The invention provides an air extraction structure applied to an axial exhaust type condenser, which comprises a condenser shell, wherein a steam inlet is arranged on the condenser shell, a plurality of cooling pipes are arranged in the condenser shell, the two ends of each cooling pipe respectively extend into water chambers at the two ends of the condenser and are respectively connected with a pipe plate in a sealing manner, the plurality of cooling pipes form a plurality of cooling pipe bundle areas and comprise an air extraction main pipe and a communicating branch pipe, the communicating branch pipe is arranged on the air extraction main pipe and is communicated with the air extraction main pipe, and the communicating branch pipe is communicated with an air extraction opening on the condenser shell.

Further, the exhaust main pipe is positioned at the far end of the exhaust side of the cooling pipe bundle area.

Further, the air exhaust main pipe is symmetrically arranged about the central axis of the steam inlet.

Further, the air exhaust main pipe is parallel to the cooling pipe.

Further, the leading-out end of the air extraction main pipe is fixed on the pipe plate on the corresponding side.

Compared with the prior art, the invention has the beneficial effects that:

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings. The detailed description of the present invention is given in detail by the following examples and the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

FIG. 1 is a schematic diagram of a conventional centripetal pumping structure;

FIG. 2 is a schematic view of a prior art lower end pumping arrangement;

FIG. 3 is a schematic diagram of an air extraction structure applied to an axial exhaust type condenser according to the present invention;

fig. 4 is a top view of an air extraction structure applied to an axial exhaust type condenser according to the present invention.

In the figure: 1. an air extraction opening; 2. a steam shield; 3. an air cooling zone; 4. an air exhaust main pipe; 5. communicating the branch pipes; 6. a steam input port; 7. a condenser housing; 8. cooling the tube bundle zone.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.

The utility model provides a be applied to air exhaust structure of axial exhaust formula condenser, as shown in fig. 3, fig. 4, including condenser casing 7, be equipped with steam input port 6 on the condenser casing 7, fig. 3, the arrow in fig. 4 is the steam air current, the steam air current passes through steam input port 6 and gets into the condenser, install a plurality of cooling tubes in the condenser casing 7, the both ends of cooling tube are equallyd divide do not extend to the water indoor at condenser both ends and respectively with tube sheet sealing connection, a plurality of cooling tubes form a plurality of cooling tube bank districts 8, including female pipe 4 of bleeding, intercommunication branch pipe 5 is installed on female pipe 4 of bleeding, and with female pipe 4 intercommunication of bleeding, intercommunication branch pipe 5 communicates with extraction opening 1 on the condenser casing 7.

The air extraction area formed by the extraction main pipe 4 is arranged at the far end of the steam exhaust side of the cooling tube bundle area 8. The pumping main pipe 4 is arranged symmetrically with respect to the central axis of the steam inlet 6, i.e. the pumping main pipe 4 in fig. 3 is arranged above and below with respect to the central axis of the steam inlet 6. The non-condensable gas is led to the air extraction opening 1 through the air extraction main pipe 4 and the communication branch pipe 5, and the short circuit of the steam flow is prevented. Preferably, the air exhaust main pipe 4 is parallel to the cooling pipe; the leading-out end of the air extraction main pipe 4 is fixed on the pipe plate at the corresponding side.

The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner; those skilled in the art can readily practice the invention as shown and described in the drawings and detailed description herein; however, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the scope of the invention as defined by the appended claims; meanwhile, any changes, modifications, and evolutions of the equivalent changes of the above embodiments according to the actual techniques of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides a be applied to air exhaust structure of axial exhaust formula condenser, includes the condenser casing, be equipped with the steam input port on the condenser casing, install a plurality of cooling tubes in the condenser casing, the both ends of cooling tube are equallyd divide do not extend to the water indoor at condenser both ends and respectively with tube sheet sealing connection, a plurality of the cooling tube forms a plurality of cooling tube bank districts, its characterized in that: the condenser comprises a main air exhaust pipe and a communicating branch pipe, wherein the communicating branch pipe is arranged on the main air exhaust pipe and communicated with the main air exhaust pipe, and the communicating branch pipe is communicated with an air exhaust opening on a condenser shell.

2. The air extraction structure applied to the axial exhaust type condenser according to claim 1, characterized in that: the air extraction main pipe is positioned at the far end of the steam exhaust side of the cooling pipe bundle area.

3. The air extraction structure applied to the axial exhaust type condenser according to claim 1, characterized in that: the air pumping main pipe is symmetrically arranged relative to the central axis of the steam inlet.

4. The air extraction structure applied to the axial exhaust type condenser according to claim 1, characterized in that: the air extraction main pipe is parallel to the cooling pipe.

5. The air extraction structure applied to the axial exhaust type condenser according to claim 1, characterized in that: and the leading-out end of the air extraction main pipe is fixed on the pipe plate at the corresponding side.