Condenser water chamber anti-corrosion device

Abstract

The utility model provides a condenser water chamber anti-corrosion device which comprises a cathode protection device, a support, a fixing foot margin arranged at the bottom of the support and used for fixing, a fixing shaft arranged at the top of the support, a cathode protection metal block installed on the fixing shaft and a protective net installed on the fixing shaft. The protective net is arranged on the outer side of the cathode protection metal block in a surrounding mode and is separated from the cathode protection metal block. The cathode protection metal block is surrounded by the protective net, and under the condition that the reaction of circulating water and the metal block is not affected, the protective net can block the cathode protection metal block broken due to strong reaction, prevent the fallen metal block from flowing randomly, and prevent a heat exchange pipe of the condenser from being blocked. Therefore, the problems that the heat exchange tube of the condenser is blocked after the cathode protection metal block is broken and the anti-corrosion protection capability is reduced can be fundamentally solved, the reliability of equipment is improved, and economic benefits are increased for enterprises.

Description

Technical Field

[0001] The utility model relates to the technical field of circulating water for steam turbines in power plants, in particular to an anti-corrosion device for a condenser water chamber. Background Art

[0002] The turbine condenser has four circulating water chambers that run from north to south. After the circulating water enters the condenser from the circulating water pump, it is divided into two pipes and enters the southwest side of the two circulating water chambers at the bottom of the low-pressure A cylinder, and flows out from the northwest side; the outflowing circulating water enters the two circulating water chambers at the bottom of the low-pressure B cylinder from the northeast side, flows out from the southeast side, merges into a pipe and returns to the cooling tower. The water inlet chambers are the two chambers in the southwest corner and the two chambers in the northeast corner (see attached Figure 2 ).

[0003] The cathodic protection metal block installed in the condenser water chamber is to slow down the corrosion of the inner wall of the condenser water chamber. However, with the improvement of environmental protection index requirements for external drainage of power plants, the amount of circulating water discharge has decreased, and the water quality has deteriorated. The cathodic protection metal block is frequently crushed and broken. After the metal block is broken and crushed, the small pieces are washed away by water and lose their protection ability. In addition, the large pieces block the condenser heat exchange tube, resulting in a decrease in the condenser heat exchange capacity, a decrease in the condenser vacuum, and an increase in the power consumption of the circulating water pump. In view of this, a condenser water chamber anti-corrosion device is proposed. Summary of the invention

[0004] The technical solution adopted by the utility model to solve the background technical problem is:

[0005] A condenser water chamber anti-corrosion device includes a cathodic protection device, including a bracket, a bottom of which is provided with a fixed foot for fixing, a fixed shaft is provided on the top of the bracket, a cathodic protection metal block is installed on the fixed shaft, a protective net is installed on the fixed shaft, and the protective net is surrounded and arranged on the outside of the cathodic protection metal block and is separated from the protective net.

[0006] Preferably, the protective net is a single-layer net.

[0007] Preferably, the protective net is an elliptical structure.

[0008] Preferably, the protective net is buckled on the fixed shaft, can move axially along the fixed shaft, and both ends are fixed to the fixed shaft by fixing bolts.

[0009] Preferably, the mesh diameter of the protective net is not larger than one quarter of the diameter of the condenser heat exchange tube.

[0010] The beneficial effect of the utility model is that a cathodic protection device is arranged in the water chamber of the condenser when the circulating water passes through the condenser, and the cathodic protection metal block is surrounded by a protective net. Under the condition that the reaction between the circulating water and the metal block is not affected, the protective net can block the cathodic protection metal block that is broken due to the strong reaction, and block the detached metal block from flowing freely, thereby preventing the condenser heat exchange tube from being blocked. In addition, the broken metal block continues to react with the circulating water through the protective mesh, which also promotes the increase of the contact area between the metal block and the water, and the anti-corrosion ability increases instead of decreasing. Even if small particles flow out of the outer side of the protective net, the heat exchange tube will not be blocked because the particle size is much smaller than the condenser heat exchange tube aperture. Therefore, the problem of the cathodic protection metal block blocking the condenser heat exchange tube and the reduction of the anti-corrosion protection ability after being broken can be fundamentally solved, thereby improving the reliability of the equipment and increasing the economic benefits for the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 It is a schematic diagram of the structure of the cathodic protection device provided by the embodiment of the utility model;

[0013] Figure 2 It is a schematic diagram of the installation structure of the cathodic protection device provided in the embodiment of the utility model;

[0014] In the figure: 1-cathodic protection device, 1.1-bracket, 1.2-fixed foot, 1.3-fixed shaft, 1.4-fixed bolt, 1.5-protective net, 1.6-cathodic protection metal block, 2-condenser water chamber, 3-condenser heat exchange tube, 4-water inlet main pipe, 5-water outlet main pipe. DETAILED DESCRIPTION

[0015] The above scheme is further described below in conjunction with specific examples. It should be understood that these examples are used to illustrate the utility model rather than to limit the scope of the utility model. The implementation conditions used in the examples can be further adjusted according to the conditions of the specific manufacturer, and the implementation conditions not specified are usually the conditions in conventional experiments.

[0016] In a specific embodiment, a condenser water chamber anti-corrosion device is provided, including a cathodic protection device 1, which includes a bracket 1.1, a fixed foot 1.2 for fixing is arranged at the bottom, a fixed shaft 1.3 is arranged at the top of the bracket 1.1, a cathodic protection metal block 1.6 is installed on the fixed shaft 1.3, and a protective net 1.5 is installed on the fixed shaft 1.3. The protective net 1.5 is surrounded and arranged outside the cathodic protection metal block 1.6 and is separated from the protective net 1.5. The separation setting can prevent the protective net from being damaged when the metal block is deformed, and on the other hand, the surface area of ​​the cathodic protection metal block 1.6 participating in the reaction is larger. The protective net can prevent the cathodic protection metal block 1.6 from spreading or moving outward after breaking, wherein the mesh aperture of the protective net 1.5 is preferably not greater than one-fourth of the aperture of the condenser heat exchange tube, so that even if metal fragments smaller than the mesh enter the condenser heat exchange tube, it will not cause the pipeline to be blocked, and at the same time, it will not affect the reaction rate of the circulating water and the cathodic protection metal block 1.6.

[0017] During installation, the cathodic protection device 1 is first installed in the condenser water chamber 2 through the fixed feet 1.2, and is set at both ends of the condenser heat exchange tube 3. During use, the circulating water passes through the condenser water chamber 2 and the condenser heat exchange tube 3 for heat exchange. When the water quality decreases, even if the reaction is strong and causes the cathode protection metal blocks to be frequently crushed and broken or even large-scale broken, the protective net will block these falling metal blocks from flowing freely, and the broken metal blocks continue to react with the circulating water through the protective mesh holes, which also increases the contact area between the metal blocks and the water, and the anti-corrosion ability increases instead of decreasing. Even if small particles flow out of the outside of the protective net, the heat exchange tube will not be blocked because the particle size is much smaller than the condenser heat exchange tube aperture. Therefore, the problem of the cathode protection metal blocks blocking the condenser heat exchange tube and the reduction of the anti-corrosion protection ability after being broken can be fundamentally solved, thereby improving the reliability of the equipment and increasing the economic benefits for the enterprise.

[0018] On this basis, the protective net 1.5 is a single-layer net. The single-layer net structure can make the fragments fully contact with the water flow.

[0019] The protective net 1.5 is an elliptical structure. The metal block is usually a rectangular parallelepiped, and the elliptical shape can ensure that the contact area between the fragments and the water flow is large enough on the basis of comprehensive coverage.

[0020] In order to facilitate the installation of the protection net 1.5 and the adjustment of the installation position of the protection net, the protection net 1.5 is buckled on the fixed shaft 1.3, can move axially along the fixed shaft 1.3, and is fixed to the fixed shaft 1.3 at both ends by fixing bolts.

[0021] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without departing from the technical concept of the invention through the above description. The technical scope of the invention is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A condenser water chamber anti-corrosion device, characterized in that: The invention comprises a cathode protection device (1), comprising a bracket (1.1), the bottom of which is provided with a fixing foot (1.2) for fixing, a fixing shaft (1.3) is provided on the top of the bracket (1.1), a cathode protection metal block (1.6) is installed on the fixing shaft (1.3), a protection net (1.5) is installed on the fixing shaft (1.3), and the protection net (1.5) is arranged to surround the outside of the cathode protection metal block (1.6) and is separated from the protection net (1.5).

2. A condenser water chamber anti-corrosion device according to claim 1, characterized in that: The protective net (1.5) is a single-layer net.

3. The condenser water chamber anti-corrosion device according to claim 1, characterized in that: The protective net (1.5) is an elliptical structure.

4. A condenser water chamber anti-corrosion device as claimed in claim 3, characterized in that: The protective net (1.5) is buckled onto the fixed shaft (1.3), can move axially along the fixed shaft (1.3), and is fixed to the fixed shaft (1.3) at both ends by fixing bolts.

5. The condenser water chamber anti-corrosion device according to claim 1, characterized in that: The mesh diameter of the protective net (1.5) is no larger than one quarter of the diameter of the condenser heat exchange tube.

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