Arrangement structure of surge tank steam-water balance pipeline of air preheater

Abstract

The utility model discloses an arrangement structure of a surge tank steam-water balance pipeline of an air preheater, which comprises the air preheater, an air preheater heat exchange surface, a steam mother pipe and a water conveying pipeline, an air preheater surge tank is connected between the air preheater heat exchange surface and the water conveying pipeline, the air preheater surge tank is communicated with a steam phase balance pipeline, and the steam phase balance pipeline is communicated with the steam mother pipe. And the vapor-phase balance pipeline is communicated with the steam mother pipe. The pressure stabilizing tank is arranged at the outlet of the air preheater, the balance pipeline is arranged between the pressure stabilizing tank and the steam main pipe, a steam trap is omitted, a steam-water mixture directly flows into the pressure stabilizing tank of the air preheater, steam in the pressure stabilizing tank can flow back to the steam main pipe through the balance pipeline, and condensate water is discharged through the water conveying pipeline. The steam-water separation in the heat exchange surface pipeline is effectively avoided, the steam-water mixture is separated in the surge tank of the air preheater, the steam-water separation resistance is reduced, and the heat exchange efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of steam-water balance of a surge tank of an air preheater, in particular to an arrangement structure of a steam-water balance pipeline of a surge tank of an air preheater. Background Art

[0002] like Figure 1 As shown, the heat exchange structure of an existing air preheater generally includes an air preheater 1, an air preheater heat exchange surface 2, a steam main pipe 3, a steam trap 4, a gate valve 5, a stop valve 6, a check valve 7 and a water supply pipe 8. The steam output from the steam main pipe 3 generates condensed water after heat exchange on the air preheater heat exchange surface 2 in the air preheater 1, and is output through the water supply pipe 5. The steam-water separation mostly adopts the structure of the steam trap 4, which is arranged at the rear end of the air preheater heat exchange surface 2. After the steam heat exchange is completed, the condensed water is discharged to the lower-level heat exchange system through the steam trap 4, while the steam remains in the air preheater heat exchange surface 2 to continue participating in heat exchange.

[0003] Due to the small diameter of the heat exchange surface 2 of the air preheater, the separation efficiency of steam and condensate in the water supply pipe 8 cannot reach the ideal state during the actual drainage process. The steam will block the condensate from flowing quickly to the steam trap 4, forming a local "steam plug" phenomenon, thereby reducing the drainage efficiency. Utility Model Content

[0004] In order to solve the above technical problems, the utility model designs an arrangement structure of the steam-water balance pipe of the pressure-surge tank of the air preheater, which can effectively increase the steam-water separation effect.

[0005] The utility model adopts the following technical solutions:

[0006] A layout structure of a steam-water balancing pipe of a pressure-surge tank of an air preheater comprises an air preheater, an air preheater heat exchange surface, a steam main pipe and a water supply pipe. An air preheater pressure-surge tank is connected between the air preheater heat exchange surface and the water supply pipe. The air preheater pressure-surge tank is connected to a steam-phase balancing pipe, and the steam-phase balancing pipe is connected to the steam main pipe.

[0007] Preferably, a safety valve is installed on the air preheater pressure regulating tank.

[0008] Preferably, a pressure gauge is installed on the air preheater pressure stabilizing tank via a pressure gauge installation pipeline, and a shut-off valve is installed on the pressure gauge installation pipeline.

[0009] Preferably, a water level gauge is installed on the air preheater pressure-stabilizing tank via a water level gauge installation pipeline, and a shut-off valve is installed on the water level gauge installation pipeline.

[0010] Preferably, a stop valve is installed on the water supply pipeline.

[0011] The beneficial effects of this utility model are as follows: It places a surge tank at the air preheater outlet, and a balancing pipe is arranged between the surge tank and the steam main pipe, eliminating the steam trap. The steam-water mixture flows directly into the air preheater surge tank. Within the surge tank, steam can flow back to the steam main pipe through the balancing pipe, while condensed water is discharged through the water pipe. This effectively avoids steam-water separation in the heat exchange surface pipes. The steam-water mixture is separated within the air preheater surge tank, reducing steam-water separation resistance and increasing heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of the heat exchange structure of an existing air preheater;

[0013] Figure 2 It is a structural schematic diagram of the utility model;

[0014] In the figure: 1. Air preheater, 2. Air preheater heat exchange surface, 3. Steam main pipe, 4. Steam trap, 5. Gate valve, 6. Stop valve, 7. Check valve, 8. Water supply pipeline, 9. Air preheater pressure regulating tank, 10. Vapor phase balancing pipeline, 11. Pressure gauge, 12. Safety valve, 13. Water level gauge. DETAILED DESCRIPTION

[0015] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0016] Example: Figure 2 As shown, an arrangement structure of a steam-water balancing pipe of a pressure-surge tank of an air preheater includes an air preheater 1, an air preheater heat exchange surface 2, a steam main pipe 3 and a water supply pipe 8. An air preheater pressure-surge tank 9 is connected between the air preheater heat exchange surface and the water supply pipe. The air preheater pressure-surge tank is connected to a steam-phase balancing pipe 10, and the steam-phase balancing pipe is connected to the steam main pipe.

[0017] A safety valve 12 is installed on the air preheater pressure stabilizing tank. A pressure gauge 11 is installed on the air preheater pressure stabilizing tank through a pressure gauge installation pipeline, and a stop valve 6 is installed on the pressure gauge installation pipeline.

[0018] The air preheater pressure regulating tank is provided with a water level gauge 13 via a water level gauge installation pipeline, and a stop valve is installed on the water level gauge installation pipeline. The water delivery pipeline is divided into two outputs, and a stop valve is installed on each of the two water delivery pipelines.

[0019] During operation, steam enters the air preheater heat exchange surface 2 through the steam main pipe 3. After heat exchange, the steam-water mixture enters the air preheater surge tank 9 for steam-water separation. The steam portion flows back to the steam main pipe 3 through the vapor balancing pipe 10, while the condensed water flows through the water pipe 8 to the next stage of heat exchange. Because the vapor balancing pipe 10 connects the steam main pipe 3 and the air preheater surge tank 9, a reverse cycle of natural steam-water circulation is formed within the air preheater heat exchange surface 2. This utility model can significantly improve steam-water separation efficiency and heat exchange efficiency, with a significant demonstration effect.

[0020] The embodiment described above is only a preferred solution of the present invention and does not limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.

Claims

1. An arrangement structure of a steam-water balance pipeline of a pressure-surge tank of an air preheater, comprising an air preheater, a heat exchange surface of the air preheater, a steam main pipe and a water pipeline, characterized in that: An air preheater pressure stabilizing tank is connected between the air preheater heat exchange surface and the water delivery pipeline, the air preheater pressure stabilizing tank is connected to a vapor phase balancing pipeline, and the vapor phase balancing pipeline is connected to a steam main pipe.

2. The arrangement structure of the steam-water balance pipeline of the pressure-surge tank of the air preheater according to claim 1 is characterized in that: A safety valve is installed on the air preheater pressure stabilizing tank.

3. The arrangement structure of the steam-water balance pipeline of the pressure-surge tank of the air preheater according to claim 1 is characterized in that: A pressure gauge is installed on the air preheater pressure stabilizing tank through a pressure gauge installation pipeline, and a stop valve is installed on the pressure gauge installation pipeline.

4. The arrangement structure of the steam-water balance pipeline of the pressure-surge tank of the air preheater according to claim 1 is characterized in that: A water level gauge is installed on the air preheater pressure stabilizing tank through a water level gauge installation pipeline, and a stop valve is installed on the water level gauge installation pipeline.

5. The arrangement structure of the steam-water balance pipeline of the pressure-surge tank of the air preheater according to claim 1 is characterized in that: A stop valve is installed on the water delivery pipeline.

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