CN214780872U

CN214780872U - High-efficient degasser of interior cold water

Info

Publication number: CN214780872U
Application number: CN202120854584.4U
Authority: CN
Inventors: 李平; 马伟宜; 谭德明
Original assignee: Wuhan Jiecheng Electric Power Technology Co ltd
Current assignee: Wuhan Jiecheng Electric Power Technology Co ltd
Priority date: 2021-04-23
Filing date: 2021-04-23
Publication date: 2021-11-19
Anticipated expiration: 2031-04-23

Abstract

The utility model discloses a high-efficiency degasser for inner cooling water, which relates to the inner cooling field of a generator rotor and comprises a cylinder body with a hollow cavity; the cylinder body is provided with an inlet and an outlet which are communicated with the hollow cavity, and the inlet is positioned above the outlet; the degassing piece is arranged in the hollow cavity and fills part of the hollow cavity; the inner cooling water free falling body entering the hollow cavity from the inlet collides on the degassing member and permeates out of the outlet; the exhaust port is arranged on the barrel and is positioned above the degassing piece, and the inner cooling water collides on the degassing piece to ensure that gas contained in the inner cooling water is separated and exhausted from the exhaust port; through setting up this degasser alone on the internal cold water pipeline, utilize the degasser to solve generator rotor water and carry the problem of saturated acid gas for separate out once more from the aquatic immediately after acid gas gets into the aquatic, thereby make quality of water acid radical ion fall to minimum concentration.

Description

High-efficient degasser of interior cold water

Technical Field

The utility model relates to an interior cold field of generator rotor specifically is a high-efficient degasser of interior cold water.

Background

The double water inner cooling steam turbine generator rotor cooling water outlet device is shown in figure 1 and mainly comprises an annular water collecting tank 101, a rotor water outlet structure 102, a sealing ring 103, a base 104 and an inner cooling water pipeline 105, wherein the rotor water outlet structure 102 rotates at a high speed in the operation of the generator, inner cooling water is centrifugally thrown out and then is conveyed to a rotor inner cooling water tank (not shown) through the inner cooling water pipeline 105 connected with a water outlet hole at the bottom of the water collecting tank 101, water in the water collecting tank 101 can generate certain negative pressure in the discharging process, and external air enters the water collecting tank 101 through the sealing ring 103 and then is conveyed to the rotor inner cooling water tank along with the water discharge.

However, because the air contains a large amount of acid gases such as carbon dioxide and the like, the inner cooling water is in a discrete state in the throwing process, so that the air can be continuously sucked from the sealing ring 103 in the maximum saturation state, and the carbon dioxide in the inner cooling water of the generator rotor basically reaches the saturation state; the pH value of the inner cooling water in the inner cooling water tank of the rotor is reduced in the long-time use process, so that the hollow copper wire of the rotor is seriously corroded; through detection, the content of copper ions in the internal cooling water exceeds over 6 times of the national standard, and sediment causes the blockage of the hollow lead and the overheating of the lead, thereby seriously threatening the safe operation of the generator.

SUMMERY OF THE UTILITY MODEL

To the problem that exists among the prior art, the utility model provides a high-efficient degasser makes the interior air of sneaking in of cold water of rotor by basic desorption before getting into interior cold water tank to reduce the influence of acid gas to the internal cold water pH value.

The utility model provides a concrete scheme as follows:

an efficient degassing device for internal cooling water comprises

A barrel having a hollow cavity; the cylinder body is provided with an inlet and an outlet which are communicated with the hollow cavity, and the inlet is positioned above the outlet;

the degassing piece is arranged in the hollow cavity and fills part of the hollow cavity; the inner cooling water free falling body entering the hollow cavity from the inlet collides on the degassing member and permeates out of the outlet; and

and the exhaust port is arranged on the barrel and positioned above the degassing piece, and the inner cooling water collides on the degassing piece to separate gas contained in the inner cooling water and then is exhausted from the exhaust port.

Furthermore, the degassing part comprises an air blocking ring and a water grate which are arranged in a superposed mode, and the inner cooling water freely falling body collides with the air blocking ring and then is discharged from the water grate in a permeating mode.

Furthermore, the water flow circulation value of the water grate is larger than that of the inlet.

Furthermore, an exhaust pipe is connected to the exhaust port, and an exhaust control valve is arranged on the exhaust pipe.

Furthermore, a first flange communication disc is arranged at the inlet of the cylinder body, a second flange communication disc is arranged at the outlet of the cylinder body, and the cylinder body is communicated with the inner cooling water pipeline through the first flange communication disc and the second flange communication disc.

Furthermore, an overflow pipe communicated with the hollow cavity is further arranged on the barrel body, the inlet end of the overflow pipe is located above the degassing part, and the outlet end of the overflow pipe is located below the degassing part.

The beneficial effect that adopts this technical scheme to reach does:

the degassing device is independently arranged on the internal cold water pipeline, the problem that the water of the generator rotor carries saturated acid gas is solved by utilizing the degassing part, and the acid gas is separated out from the water again immediately after entering the water, so that the acid radical ions of the water quality are reduced to the minimum concentration, and the pH value is ensured to be close to 7.0 as much as possible; if other measures for improving the pH value are taken in an auxiliary manner, the pH value can be ensured to reach the micro-alkalinity range, the corrosion of the hollow copper wire is reduced, the situation that corrosive sediments block a through-flow water channel is prevented, and the national relevant standards are met.

Drawings

Fig. 1 is a schematic diagram of the supply of cold water in the prior art.

FIG. 2 is a schematic diagram of the high-efficiency degasser of the present embodiment.

Wherein: the device comprises a cylinder body 10, a first flange connecting disc 11, a second flange connecting disc 12, a degassing part 20, a gas blocking ring 21, a water grate 22, an exhaust pipe 30, an exhaust control valve 31, an overflow pipe 40, a water collecting tank 101, a rotor water outlet structure 102, a sealing ring 103, a base 104 and a cooling water pipeline 105.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

The embodiment provides a high-efficiency degassing device for internal cooling water, which is arranged on an internal cooling water pipeline 105, so that the internal cooling water passing through the internal cooling water pipeline 105 can be subjected to degassing treatment by the degassing device, and the purposes of reducing the content of acid gas in the internal cooling water and reducing acid radical ions in water to the minimum concentration are achieved.

Specifically, referring to fig. 2, the high efficiency degassing apparatus includes a cylinder 10, the cylinder 10 having a hollow cavity; an inlet and an outlet which are communicated with the hollow cavity are formed in the cylinder body 10, and the inlet is positioned above the outlet; the inlet and the outlet are respectively communicated with the inner cooling water pipe 105, so that the inner cooling water of the inner cooling water pipe 105 can enter the hollow cavity of the cylinder 10 through the inlet and then flow out from the outlet.

A degassing part 20 is arranged in the hollow cavity, and the degassing part 20 is arranged in the hollow cavity and fills part of the hollow cavity; thus, the inner cooling water entering the hollow cavity from the inlet collides with the degassing member 20 in the movement of the free falling body, and then permeates and flows out from the outlet; the internal cooling water sufficiently absorbs the acid gas such as carbon dioxide in the air before entering the inlet, but after colliding with the degassing member 20, the relevant gas (including the absorbed acid gas such as carbon dioxide) in the internal cooling water is immediately separated from the internal cooling water again, so that the acid radical ions in the internal cooling water are reduced to the minimum concentration, and finally, the internal cooling water flows out from the outlet to the internal cooling water tank (not shown) of the rotor.

In order to ensure the smooth discharge of air, the cylinder 10 is further provided with an exhaust port, the exhaust port is arranged on the cylinder 10 and positioned above the degassing part 20, and the inner cooling water collides on the degassing part 20 to separate the gas contained in the inner cooling water and discharge the gas from the exhaust port.

The problem that the cold water in the generator rotor carries saturated acid gas is solved through the arrangement, so that the acid gas is separated out from the water again immediately after entering the water, the acid radical ions in the water are reduced to the minimum concentration, and the pH value is ensured to be close to 7.0 as much as possible; and other measures for improving the pH value are taken in an auxiliary manner, so that the pH value can be ensured to reach the alkalescence range, the corrosion of the hollow copper wire is reduced, the situation that corrosive sediments block a through-flow water channel is prevented, and the national relevant standard is met.

In this embodiment, the degassing member 20 includes an air-blocking ring 21 and a water grate 22, which are stacked, and the inner cooling water freely falls into the air-blocking ring 21 and then permeates and is discharged from the water grate 22.

Optionally, the water flow circulation value of the water grate 22 is greater than the water flow circulation value at the inlet; the device is used for ensuring the smooth circulation of the internal cooling water and avoiding the occurrence of the condition that the internal cooling water is gathered in the cylinder body 10.

Optionally, the flow rate of the water grate 22 is 1.8 times the flow rate of cold water at the inlet.

In this embodiment, an exhaust pipe 30 is connected to the exhaust port, and an exhaust control valve 31 is provided on the exhaust pipe 30; and when the abnormity occurs, the exhaust control valve 31 can be closed, so that the safe operation of the unit is ensured.

In this embodiment, in order to facilitate detachment and adjustment and facilitate installation of the gas barrier ring 21, a first flange communication plate 11 is disposed at an inlet of the cylinder 10, a second flange communication plate 12 is disposed at an outlet of the cylinder 10, and the cylinder 10 is communicated with the inner cooling water pipe 105 through the first flange communication plate 11 and the second flange communication plate 12.

In this embodiment, in order to further improve the safety of the unit and avoid the situation that the internal cooling water of the cylinder 10 is collected, an overflow pipe 40 communicated with the hollow cavity is further disposed on the cylinder 10, an inlet end of the overflow pipe 40 is located above the degassing part 20, and an outlet end of the overflow pipe 40 is located below the degassing part 20.

The overflow pipe 40 is used as a final safety measure, once the degassing part 20 is blocked, the internal cooling water in the barrel 10 is gradually collected and automatically flows out of the overflow pipe 40 to bypass the degassing part 20 after being collected to a certain height; the safe operation of the unit is ensured.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. An efficient degassing device for internal cooling water is characterized by comprising

A barrel (10) having a hollow cavity; an inlet and an outlet which are communicated with the hollow cavity are formed in the cylinder body (10), and the inlet is positioned above the outlet;

a degasser (20) disposed within the hollow cavity and filling a portion of the hollow cavity; the free falling body of the inner cooling water entering the hollow cavity from the inlet collides on the degasser (20) and permeates out of the outlet; and

and the exhaust port is formed in the barrel (10) and positioned above the degassing piece (20), and the inner cooling water collides on the degassing piece (20) so that gas contained in the inner cooling water is separated and exhausted from the exhaust port.

2. The efficient internally-cooled water degassing device according to claim 1, wherein the degassing member (20) comprises an air-blocking ring (21) and a water grate (22) which are arranged in a superposed manner, and the freely falling body of the internally-cooled water collides with the air-blocking ring (21) and then permeates and is discharged from the water grate (22).

3. The efficient degassing device for internal cooling water according to claim 2, wherein the water flow circulation value of said water grate (22) is larger than the water flow circulation value at said inlet.

4. The efficient degassing device for internal cooling water according to claim 3, wherein an exhaust pipe (30) is connected to said exhaust port, and an exhaust control valve (31) is provided on said exhaust pipe (30).

5. The efficient degassing device for internal cooling water according to claim 4, characterized in that a first flange communication disc (11) is arranged at the inlet of the cylinder (10), a second flange communication disc (12) is arranged at the outlet of the cylinder (10), and the cylinder (10) is communicated with the internal cooling water pipeline through the first flange communication disc (11) and the second flange communication disc (12).

6. An internal cooling water high-efficiency degasser as claimed in any one of claims 1-5, wherein said barrel (10) is further provided with an overflow pipe (40) communicated with said hollow cavity, the inlet end of said overflow pipe (40) is located above said degasser (20), and the outlet end of said overflow pipe (40) is located below said degasser (20).