A condensate pump recirculation device for an integrated low-pressure heater

Abstract

This utility model relates to the field of condensate pump recirculation technology, specifically a condensate pump recirculation device for an integrated low-pressure heater. To address the issue of condensate pump recirculation pipe arrangement in integrated low-pressure heaters, effectively realize the condensate pump recirculation function, and optimize the integrated low-pressure heater structure, this solution involves the condensate pump recirculation pipe passing through one of the end caps. The inlet end of the condensate pump recirculation pipe connects to the condensate pump recirculation pipeline, and the outlet end connects to the inlet end of an elbow. The outlet end of the elbow connects to the inlet end of a perforated pipe, and the outlet end of the perforated pipe connects to the inlet end of a support pipe. The outlet end of the support pipe is fixed to the inner wall of the lower side of the cylinder, and the support pipe is connected to the cylinder. A sealing baffle is provided on the side of the perforated pipe facing the heat exchange tube. This solution provides a reasonable arrangement, meets practical needs, and makes reasonable use of the internal space of the low-pressure heater, resulting in high economic efficiency.

Description

Technical Field

[0001] This utility model relates to the field of condensate pump recirculation technology, specifically a condensate pump recirculation device for an integrated low-pressure heater. Background Technology

[0002] In traditional nuclear power projects, the low-pressure heater (non-stationary low-pressure heater) system of the turbine generator unit includes the LP3 and LP4 low-pressure heaters. The LP3 low-pressure heater is equipped with a condensate tank and a condensate pump. Normally, condensate from the condensate tank is pumped to the condensate pipe at the LP3 low-pressure heater outlet. The steam side of the condensate tank connects to the steam side of the LP3 low-pressure heater. Condensate from the LP4 low-pressure heater enters the LP3 low-pressure heater condensate tank. Currently, some nuclear power projects have very limited plant space. To meet space requirements, it is often recommended to design the LP3 low-pressure heater and condensate tank as a single unit, with the manufacturer providing an integrated low-pressure heater layout plan. Therefore, a large-capacity water storage space is installed in the lower part of the LP3 low-pressure heater shell side to ensure that the condensate tank's volume requirements are met. While meeting the volume requirements, the positions of the various outlet pipes of the integrated low-pressure heater must be rationally arranged to provide an optimized plant layout. Because the condensate pump recirculation pipe of the condensate tank is a very important connection, when the system's required condensate flow is low, a portion of the pump's condensate should be returned to the LP3 low-pressure heater through this recirculation pipe. Therefore, the condensate pump recirculation pipe should be placed in a suitable location within the integrated low-pressure heater, satisfying the requirements of the connection itself while not interfering with the heater's function within the heater's internal structure. This patent provides a condensate pump recirculation device for an integrated low-pressure heater. This device offers a reasonable layout, meets practical needs, and makes efficient use of the internal space of the low-pressure heater, resulting in high economic efficiency. Utility Model Content

[0003] The purpose of this utility model patent is to solve the problem of arranging the condensate pump recirculation pipe in an integrated low-pressure heater, effectively realize the condensate pump recirculation function, and optimize the integrated low-pressure heater structure. This utility model proposes a condensate pump recirculation device for an integrated low-pressure heater.

[0004] The purpose of this utility model is achieved as follows: a condensate pump recirculation device for an integrated low-pressure heater, the low-pressure heater comprising a cylinder, heat exchange tubes and two end caps;

[0005] The condensate pump recirculation device includes a condensate pump recirculation pipe, an elbow, a perforated pipe, and a support pipe.

[0006] The condensate pump recirculation pipe passes through one of the end caps. The inlet end of the condensate pump recirculation pipe is used to connect to the condensate pump recirculation pipeline. The outlet end of the condensate pump recirculation pipe is connected to the inlet end of the elbow. The outlet end of the elbow is connected to the inlet end of the perforated pipe. The outlet end of the perforated pipe is connected to the inlet end of the support pipe. The outlet end of the support pipe is fixed on the inner wall of the lower side of the cylinder and the support pipe is connected to the cylinder.

[0007] The side of the porous tube facing the heat exchange tube is a closed end face.

[0008] Furthermore, the porous tube is located diagonally below the heat exchange tube.

[0009] Furthermore, multiple support plates are fixed to the outer wall of the condensate pump recirculation pipe, and the support plates are used to connect with the inner wall of the end cap.

[0010] Furthermore, multiple support plates are welded to the recirculation pipe of the condensate pump.

[0011] Furthermore, multiple support plates are welded to the end cap.

[0012] Furthermore, multiple support plates are evenly distributed and fixed to the outer wall of the condensate pump recirculation pipe along the circumferential direction.

[0013] Furthermore, multiple support plates are fixed to the outer wall of the porous tube, and the support plates are used to connect with the inner wall of the end cap.

[0014] Furthermore, multiple support plates are welded to the porous tube.

[0015] Furthermore, the angle between any two adjacent support plates is 60°.

[0016] Beneficial effects:

[0017] The device offers a reasonable layout to meet actual needs. At the same time, it makes good use of the internal space of the low-pressure heater, which is highly economical. By placing the condensate pump recirculation pipe at the end cap, the length of the cylinder is saved, the length of the equipment is effectively controlled, and the plant space is saved. It also avoids the perforated pipe from scouring the heat exchange tubes and does not affect the heat exchange performance of the heat exchange tubes. Moreover, the reasonable layout of this device will not cause any interference. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a condensate pump recirculation device for an integrated low-pressure heater according to the present invention.

[0019] Figure 2 yes Figure 1 A schematic diagram of direction A. Detailed Implementation

[0020] Specific Implementation Method 1: A condensate pump recirculation device for an integrated low-pressure heater, wherein the low-pressure heater includes a cylinder 6, a heat exchange tube 9, and two end caps 5;

[0021] The condensate pump recirculation device includes a condensate pump recirculation pipe 1, an elbow 2, a perforated pipe 3, and a support pipe 4.

[0022] The condensate pump recirculation pipe 1 passes through one of the end caps 5. The inlet end of the condensate pump recirculation pipe 1 is used to connect to the condensate pump recirculation pipeline. The outlet end of the condensate pump recirculation pipe 1 is connected to the inlet end of the elbow 2. The outlet end of the elbow 2 is connected to the inlet end of the perforated pipe 3. The outlet end of the perforated pipe 3 is connected to the inlet end of the support pipe 4. The outlet end of the support pipe 4 is fixed on the inner wall of the lower side of the cylinder 6 and the support pipe 4 is connected to the cylinder 6.

[0023] The side of the porous tube 3 facing the heat exchange tube 9 is a closed end face.

[0024] In this embodiment: the end cap is fixed to the side of the cylinder body, and the heat exchange tube passes through the middle of the cylinder body;

[0025] The side of the porous tube facing the heat exchange tube is a closed end face, meaning there are no holes near the heat exchange tube. This prevents the heat exchange tube from being washed away by the spray from the porous tube of the condensate pump recirculation pipe device, effectively avoiding scouring of the heat exchange tube.

[0026] By placing the condensate pump recirculation pipe at the end cap, the length of the cylinder is saved, effectively controlling the length of the equipment.

[0027] Other implementation methods are the same as those in Specific Implementation Method 1.

[0028] Specific implementation method 2: A condensate pump recirculation device for an integrated low-pressure heater, wherein the porous tube 3 is located obliquely below the heat exchange tube 9.

[0029] In this embodiment: to prevent the heat exchange tubes from being washed away by the porous pipe spray of the condensate pump recirculation pipe device.

[0030] Other implementation methods are the same as those in Specific Implementation Method 1.

[0031] Specific implementation method 3: A condensate pump recirculation device for an integrated low-pressure heater, wherein multiple support plates 7 are fixed on the outer wall of the condensate pump recirculation pipe 1, and the support plates 7 are used to connect with the inner wall of the end cap 5.

[0032] Other implementation methods are the same as those in Specific Implementation Method 1.

[0033] Specific implementation method four: A condensate pump recirculation device for an integrated low-pressure heater, wherein multiple support plates 7 are welded to the condensate pump recirculation pipe 1.

[0034] Other implementation methods are the same as those in Specific Implementation Method 3.

[0035] Specific implementation method five: A condensate pump recirculation device for an integrated low-pressure heater, wherein multiple support plates 7 are welded to the end cap 5.

[0036] Other implementation methods are the same as those in Specific Implementation Method 3.

[0037] Specific implementation method six: A condensate pump recirculation device for an integrated low-pressure heater, wherein multiple support plates 7 are evenly distributed and fixed on the outer wall of the condensate pump recirculation pipe 1 along the circumferential direction.

[0038] Other implementation methods are the same as those in Specific Implementation Method 3.

[0039] Specific implementation method seven: A condensate pump recirculation device for an integrated low-pressure heater, wherein multiple support plates 8 are fixed on the outer wall of the porous pipe 3, and the support plates 8 are used to connect with the inner wall of the end cap 5.

[0040] Other implementation methods are the same as those in Specific Implementation Method 1.

[0041] Specific implementation method eight: A condensate pump recirculation device for an integrated low-pressure heater, wherein multiple support plates 8 are welded to the porous pipe 3.

[0042] Other implementation methods are the same as those in Specific Implementation Method Seven.

[0043] Specific Implementation Method Nine: A condensate pump recirculation device for an integrated low-pressure heater, wherein the angle between any two adjacent support plates is 60°.

[0044] Other implementation methods are the same as those in Specific Implementation Method Seven.

[0045] Working principle: The device is placed at the tail end of the shell of the integrated low-pressure heater. To prevent backflow of condensate, the condensate pump recirculation device is located above the high water level, 50-100mm above the center line.

[0046] To save on the length of the heat exchanger body, effectively control the equipment length, and conserve plant space, the condensate pump recirculation pipe is located at the end cap. If the device were placed on the body, connecting pipes would need to be extended from the top or side of the body, severely impacting the heat exchange performance of the heat exchange tubes and causing them to be eroded. Therefore, lengthening the body would be uneconomical. Furthermore, the numerous and complex connecting pipes extending from the body would easily cause interference.

[0047] To prevent the perforated pipe spray of the condensate pump recirculation pipe device from scouring the heat exchange tubes, no holes should be made near the heat exchange tubes to effectively avoid scouring of the heat exchange tubes.

[0048] In addition, a support pipe is used to connect the lower part of the porous pipe to the cylinder body. A support plate is designed at the end cap, and a support plate is installed at the porous pipe and welded to the end cap to prevent vibration of the condensate pump recirculation device during actual operation.

Claims

1. A condensate pump recirculation device for an integrated low-pressure heater, the low-pressure heater comprising a cylinder (6), a heat exchange tube (9), and a head (5). Its features are: The condensate pump recirculation device includes a condensate pump recirculation pipe (1), an elbow (2), a perforated pipe (3), and a support pipe (4). The condensate pump recirculation pipe (1) passes through one of the end caps (5). The inlet end of the condensate pump recirculation pipe (1) is used to connect to the condensate pump recirculation pipeline. The outlet end of the condensate pump recirculation pipe (1) is connected to the inlet end of the elbow (2). The outlet end of the elbow (2) is connected to the inlet end of the perforated pipe (3). The outlet end of the perforated pipe (3) is connected to the inlet end of the support pipe (4). The outlet end of the support pipe (4) is fixed on the inner wall of the lower side of the cylinder (6) and the support pipe (4) is connected to the cylinder (6). The side of the porous tube (3) facing the heat exchange tube (9) is a closed end face.

2. The condensate pump recirculation device for an integrated low-pressure heater according to claim 1, characterized in that: The porous tube (3) is located diagonally below the heat exchange tube (9).

3. The condensate pump recirculation device for an integrated low-pressure heater according to claim 1, characterized in that: Multiple support plates (7) are fixed to the outer wall of the condensate pump recirculation pipe (1), and the support plates (7) are used to connect with the inner wall of the end cap (5).

4. A condensate pump recirculation device for an integrated low-pressure heater according to claim 3, characterized in that: Multiple support plates (7) are welded to the condensate pump recirculation pipe (1).

5. A condensate pump recirculation device for an integrated low-pressure heater according to claim 3, characterized in that: Multiple support plates (7) are welded to the head (5).

6. A condensate pump recirculation device for an integrated low-pressure heater according to claim 3, characterized in that: Multiple support plates (7) are evenly distributed and fixed on the outer wall of the condensate pump recirculation pipe (1) along the circumferential direction.

7. A condensate pump recirculation device for an integrated low-pressure heater according to claim 1, characterized in that: Multiple support plates (8) are fixed to the outer wall of the porous tube (3). The support plates (8) are used to connect with the inner wall of the end cap (5).

8. A condensate pump recirculation device for an integrated low-pressure heater according to claim 7, characterized in that: Multiple support plates (8) are welded to the porous tube (3).

9. A condensate pump recirculation device for an integrated low-pressure heater according to claim 7, characterized in that: The angle between any two adjacent support plates (8) is 60°.

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