Multi-stage water seal device for steam seal heater

Abstract

The utility model relates to a multi-stage water seal device for a steam seal heater. The multi-stage water seal device comprises the steam seal heater, one end of the water seal assembly is communicated with the steam seal heater through a drainage pipeline; the condenser is communicated with the other end of the water seal assembly through a connecting pipe; the water seal assembly comprises multiple stages of water seal pipes which are sequentially connected in series, a water inlet pipe of the first-stage water seal pipe is communicated with the steam seal heater through a drainage pipeline, and a water outlet pipe of the last-stage water seal pipe is communicated with the condenser through a connecting pipe; the water sealing pipe is provided with N stages, and N is an integer greater than 4; one end of the bypass valve is communicated with the water inlet pipe outside the water sealing pipe, and the other end of the bypass valve is communicated with the water inlet pipe of the next-stage water sealing pipe. Two stages of water seals are additionally arranged at the inlet of the multi-stage water seal, so that normal drainage of the steam seal heater is met, and the vacuum of the condenser is not affected any more. Meanwhile, by arranging the bypass valve, the switching number of the water seal is controlled, bypass cutting can be conducted at any time when the water seal breaks down, and system operation and quality production are not affected.

Description

Technical Field

[0001] This utility model relates to the field of water seal technology, and in particular to a multi-stage water seal device for a steam seal heater. Background Technology

[0002] In the prior art, the condensate from the steam in the generator steam seal heater is discharged through a U-shaped water seal pipe at the bottom. The discharged condensate is sent to the condenser for recycling. Its function is to discharge the condensate in the steam seal heater in a timely manner, maintain the condensate level in the heater, and prevent air from entering the condenser through the steam seal heater, thus affecting the condenser vacuum.

[0003] In addition, the generator steam seal heater is equipped with a bypass drain, which can be shut off when the U-shaped water seal malfunctions, allowing water to drain to the sewer. However, when the height of the multi-stage water seal after the steam seal heater is insufficient to meet production requirements, fluctuations in the generator load will affect the condenser vacuum, causing the U-shaped water seal to malfunction. When the multi-stage water seal malfunctions, the steam seal heater's drain water will be directly discharged into the sewer, resulting in water waste. Utility Model Content

[0004] The purpose of this invention is to provide a multi-stage water seal device for a steam seal heater, which solves the problem that the height of the multi-stage water seal after the steam seal heater in the prior art is insufficient to meet production requirements.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] This utility model provides a multi-stage water seal device for a steam seal heater, comprising:

[0007] Steam seal heater;

[0008] A water seal assembly, one end of which is connected to the steam seal heater via a drain pipe;

[0009] A condenser, wherein the condenser is connected to the other end of the water seal assembly via a connecting pipe;

[0010] The water seal assembly includes multiple stages of water seal pipes connected in series. The inlet pipe of the first stage water seal pipe is connected to the steam seal heater through the drain pipe, and the outlet pipe of the last stage water seal pipe is connected to the condenser through the connecting pipe. The water seal pipe is provided in N stages, where N is an integer greater than 4.

[0011] It also includes: a bypass valve, one end of which is connected to the inlet pipe located outside the water seal pipe, and the other end of which is connected to the inlet pipe of the next-level water seal pipe.

[0012] Furthermore, a main valve is provided on the drainage pipe, which is used to control the drainage in the steam seal heater to flow into each of the water seal pipes.

[0013] Furthermore, a shut-off valve is provided on the connecting pipe, which is used to control the drainage of the water seal pipe into the condenser.

[0014] Furthermore, the length of the inlet pipe is less than the length of the water seal pipe.

[0015] Furthermore, the water seal pipe is provided with a drain outlet at its end, and the drain outlet is connected to the main drain pipe through a drain pipe, which is connected to the drainage ditch.

[0016] Furthermore, a drain valve is installed on the drain pipe.

[0017] Furthermore, the installation height of the steam seal heater is greater than the installation height of the condenser.

[0018] Furthermore, the water seal pipe is provided with 6 stages.

[0019] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0020] This invention relates to a multi-stage water seal device for a steam-sealed heater. By adding two more water seals at the inlet of the multi-stage water seal, it ensures normal drainage of the steam-sealed heater under different power generation loads, preventing fluctuations in power generation load from affecting the condenser vacuum. Simultaneously, by incorporating a bypass valve, the number of water seals switched on and off can be controlled, allowing for immediate bypass disconnection in case of a water seal failure, without impacting system operation or production quality. Attached Figure Description

[0021] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0022] Figure 1 This is a plan view of a multi-stage water seal device for a steam seal heater provided by this utility model;

[0023] Figure 2 This is a cross-sectional view along direction A of a multi-stage water seal device for a steam seal heater provided by this utility model;

[0024] The reference numerals in the attached figures are explained as follows:

[0025] 1. Steam seal heater; 2. Water seal assembly; 201. Water seal pipe; 202. Inlet pipe; 203. Outlet pipe; 204. Drain pipe; 2040. Drain valve; 205. Drain header; 3. Drainage pipe; 301. Main valve; 4. Condenser; 5. Connecting pipe; 501. Shut-off valve; 6. Bypass valve. Detailed Implementation

[0026] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0027] See Figures 1 to 2 The multi-stage water seal device for a steam seal heater disclosed in this utility model includes a steam seal heater 1, a water seal assembly 2, a drain pipe 3, a condenser 4, a connecting pipe 5, and a bypass valve 6.

[0028] Specifically, the aforementioned steam seal heater 1 is connected to one end of the water seal assembly 2 via a drain pipe 3, while the other end of the water seal assembly 2 is connected to the condenser 4 via a connecting pipe 5. The drain is discharged in stages, and the steam in the steam seal heater 1 is sealed by the water column in the water seal assembly 2 and cannot leak out to the condenser 4.

[0029] The aforementioned water seal assembly 2 includes multiple stages of water seal pipes 201 arranged in series. The inlet pipe 202 of the first-stage water seal pipe 201 is connected to the steam seal heater 1 via the aforementioned drain pipe 3, and the outlet pipe 203 of the last-stage water seal pipe 201 is connected to the steam condenser 4 via the aforementioned connecting pipe 5. The aforementioned first-stage water seal pipe 201 refers to the water seal closest to the steam seal heater 1, while the last-stage water seal pipe 201 refers to the water seal closest to the steam condenser 4. The specific number of water seal pipes 201 can be reasonably arranged according to needs, and can be set to 5, 6, 7 or other numbers, as long as it can meet production requirements.

[0030] In this embodiment of the utility model, two additional water seals are added to the original four-stage water seal. By increasing the number of water seal pipes 201, the water seal liquid level of the multi-stage water seal is increased, thereby preventing steam in the steam seal heater 1 from leaking into the condenser 4 and affecting the system operation.

[0031] A main valve 301 is installed on the aforementioned drainage pipe 3. The main valve 301 is used to control the drainage in the aforementioned steam seal heater 1 to flow along the drainage pipe 3 to each water seal pipe 201.

[0032] For the aforementioned condenser 4, it is connected to one end of the water seal assembly 2 via a connecting pipe 5, and a shut-off valve 501 is provided on the aforementioned connecting pipe 5. The shut-off valve 501 is used to control the drainage in the water seal pipe 201 to be directed to each condenser 4.

[0033] Furthermore, in this embodiment of the present invention, the length of the aforementioned water inlet pipe 202 is set to be less than the length of the aforementioned water seal pipe 201. This is intended to allow the condensate to be injected smoothly and to prevent the condensate from impacting the water seal pipe 201 when it enters the water seal pipe 201 due to the excessive length difference between the water inlet pipe 202 and the water seal pipe 201. This would cause the condensate to splash up, thereby generating too many air bubbles and affecting the pressure difference provided.

[0034] In this embodiment of the invention, a drain outlet is provided at the end of each of the aforementioned water seal pipes 201, and each drain outlet is connected to a main drain pipe 205 via a drain pipe 204. The end of the main drain pipe 205 is connected to a ditch, thereby draining the condensate from the water seal pipes 201. Additionally, in this embodiment of the invention, a drain valve 2040 is provided on each drain pipe 204 to control the flow of water through the drain pipe 204.

[0035] In this embodiment of the present invention, the installation height of the aforementioned steam seal heater 1 is set to be greater than the installation height of the aforementioned condenser 4. This arrangement avoids the possibility that condensate may flow back into the steam seal heater 1 due to gravity, thereby affecting the normal operation of the system.

[0036] In addition, a bypass valve 6 is provided in this embodiment of the invention. One end of the bypass valve 6 is connected to the inlet pipe 202 of the aforementioned water seal pipe 201, and the other end is connected to the inlet pipe 202 of the next-stage water seal pipe 201. In this invention, each of the two newly added water seal pipes 201 is equipped with a bypass valve 6. The bypass valve 6 can change the flow path of the drainage, thereby enabling the individual switching of the corresponding water seal pipe 201, achieving online adjustment of the water seal resistance, adapting to changes in pressure difference before and after the water seal, and achieving the purpose of balancing the inlet and outlet water volumes of the multi-stage water seal. Of course, the number of bypass valves 6 can be selected and adjusted according to the number of water seal pipes 202 and actual needs.

[0037] By opening the bypass valve 6 and closing the drain valve 2040 of the water seal pipe 201 corresponding to the bypass valve 6, the condensate discharged from the steam seal heater 1 can directly enter the next stage water seal through the bypass valve 6, realizing the individual switching of the current water seal, realizing the online adjustment of the water seal resistance, adapting to the pressure difference changes before and after the water seal, and avoiding the problem of insufficient water seal height affecting the condenser vacuum.

[0038] Furthermore, the aforementioned main valve 301, drain valve 2040, and shut-off valve 501 are all vacuum shut-off valves, designed to prevent air leakage during operation of the multi-stage water seal device for the steam-sealed heater disclosed in this utility model, which would affect the operation of the device. Of course, other valves can also be used, depending on the actual situation, as long as the stable operation of the entire device can be ensured.

[0039] In summary, the multi-stage water seal device for a steam-sealed heater disclosed in this utility model, by adding two more stages of water seals at the inlet of the multi-stage water seal, satisfies the normal drainage requirements of the steam-sealed heater under different power generation loads, ensuring that the condenser vacuum is no longer affected when the power generation load fluctuates. Simultaneously, by setting a bypass valve to control the number of water seals switched on and off, the bypass can be cut off at any time in the event of a water seal failure, without affecting system operation and production quality.

[0040] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the protection scope of this utility model.

Claims

1. A multi-stage water seal device for a steam-sealed heater, characterized in that, include: Steam seal heater (1); A water seal assembly (2), one end of which is connected to the steam seal heater (1) via a drain pipe (3); Condenser (4), the condenser (4) is connected to the other end of the water seal assembly (2) through a connecting pipe (5); The water seal assembly (2) includes multiple water seal pipes (201) connected in series. The inlet pipe (202) of the first-stage water seal pipe (201) is connected to the steam seal heater (1) through the drain pipe (3), and the outlet pipe (203) of the last-stage water seal pipe (201) is connected to the condenser (4) through the connecting pipe (5). The water seal pipe (201) is provided with N stages, where N is an integer greater than 4. It also includes: a bypass valve (6), one end of which is connected to the inlet pipe (202) located outside the water seal pipe (201), and the other end of which is connected to the inlet pipe (202) of the next-level water seal pipe (201).

2. The multi-stage water seal device for a steam seal heater according to claim 1, characterized in that, A main valve (301) is provided on the drainage pipe (3), and the main valve (301) is used to control the drainage in the steam seal heater (1) to flow into each of the water seal pipes (201).

3. The multi-stage water seal device for a steam seal heater according to claim 1, characterized in that, A shut-off valve (501) is provided on the connecting pipe (5). The shut-off valve (501) is used to control the drainage in the water seal pipe (201) to flow into the condenser (4).

4. A multi-stage water seal device for a steam seal heater according to claim 1, characterized in that, The length of the inlet pipe (202) is less than the length of the water seal pipe (201).

5. A multi-stage water seal device for a steam seal heater according to claim 1, characterized in that, The water seal pipe (201) is provided with a drain outlet at its end. The drain outlet is connected to the main drain pipe (205) through the drain pipe (204). The main drain pipe (205) is connected to the ditch.

6. A multi-stage water seal device for a steam seal heater according to claim 5, characterized in that, A drain valve (2040) is provided on the drain pipe (204).

7. A multi-stage water seal device for a steam seal heater according to claim 1, characterized in that, The installation height of the steam seal heater (1) is greater than the installation height of the condenser (4).

8. A multi-stage water seal device for a steam seal heater according to claim 1, characterized in that, The water seal pipe (201) is equipped with 6 stages.

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