CN219867867U - Drainage system for circulating main steam of fluidized bed boiler - Google Patents
Drainage system for circulating main steam of fluidized bed boiler Download PDFInfo
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- CN219867867U CN219867867U CN202321209624.5U CN202321209624U CN219867867U CN 219867867 U CN219867867 U CN 219867867U CN 202321209624 U CN202321209624 U CN 202321209624U CN 219867867 U CN219867867 U CN 219867867U
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- main steam
- drainage
- pipeline
- main
- fluidized bed
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- 238000003466 welding Methods 0.000 claims abstract description 7
- 239000003638 chemical reducing agent Substances 0.000 claims description 11
- 230000002209 hydrophobic effect Effects 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 11
- 230000007774 longterm Effects 0.000 abstract description 4
- 238000004880 explosion Methods 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
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- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The utility model discloses a drainage system for circulating main steam of a fluidized bed boiler, which comprises a main steam main pipe connected with at least one boiler and a back pressure machine, wherein a drainage pipeline is connected between the boiler and the back pressure machine, a pipeline drainage expansion device is connected at the end part of the drainage pipeline, which is far away from the main steam main pipe, and a throttling component is arranged in the drainage pipeline. After the technical scheme is adopted, the drainage system for circulating the main steam of the fluidized bed boiler can be provided, the throttle lever is added in the drainage pipeline of the main steam drainage system according to the actual running condition of the main steam drainage system, and the phenomenon of vibration in the running of the main steam drainage pipeline is avoided on the premise that the drainage heat exchange efficiency of the main steam system is guaranteed and the drainage amount of condensate water of the main steam system is not influenced, and the potential safety hazard that pipeline explosion is caused by the long-term vibration pipeline interface and the disconnection of welding seams of the drainage pipeline during the running of a unit is avoided.
Description
Technical Field
The utility model relates to a drainage system for circulating main steam of a fluidized bed boiler.
Background
The drainage system of the existing circulating fluidized bed boiler is formed by combining a plurality of boilers, a back press, a medium-pressure accident temperature and pressure reducer, a low-pressure peak regulation temperature and pressure reducer and the like.
When the boiler is heated and pressurized, a front drain valve of a steam valve of a boiler outlet is required to be opened to drain condensed water in a pipeline, so that a water hammer is prevented, and the heat exchange efficiency is improved; when meeting the condition of doubling, open main steam parent pipe trap and prevent that there is water storage in the pipeline from causing the water hammer, but open the trap under this pressure, temperature and can cause the drainage pipeline to take place vibration, swing, long-term vibration has pipeline interface, the risk of welding seam disconnection, also has the risk that destroys valve and pipeline interface and leads to the pipeline to explode the pipe.
Disclosure of Invention
In view of the above problems, the present utility model provides a hydrophobic system for circulating main steam of a fluidized bed boiler.
In order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides a drainage system for circulating fluidized bed boiler main steam, includes the main steam main pipe of being connected with at least one boiler and backpressure machine, main steam main pipe is located the department between boiler and the backpressure machine and is connected with the drainage pipeline, the drainage pipeline is kept away from the tip department of main steam main pipe and is connected with the drainage of pipeline and expands the container, the drainage pipeline embeds has throttling element.
Preferably, the throttle member is a throttle lever having a through hole penetrating in a longitudinal direction thereof.
Preferably, both ends of the throttle lever are fixedly connected with the drainage pipeline in a whole circle welding mode respectively.
Preferably, the throttle lever is in interference fit with the hydrophobic pipeline.
Preferably, the drain pipeline is provided with a first main steam main drain valve and a second main steam main drain valve, and the throttling component is arranged on the lower side of the drain pipeline, which is positioned on the main steam main drain valve.
Preferably, the boiler is connected with the main steam main pipe through a first branch pipe, the middle part of the first branch pipe is connected with a second branch pipe, the end part of the second branch pipe is connected with a front end pipeline drainage flash tank, the middle part of the second branch pipe is connected with a boiler outlet steam front drain valve, and one side of the first branch pipe, which is close to the main steam main pipe, is provided with a boiler outlet steam valve.
Preferably, the number of the boilers is 3, and the number of the back presses is 2.
Preferably, the end part of the main steam main pipe is also connected with a medium-pressure accident temperature and pressure reducer, a low-pressure accident temperature and pressure reducer and a low-pressure peak regulation temperature and pressure reducer.
As can be seen from the above description of the structure of the present utility model, compared with the prior art, the present utility model has the following advantages:
according to the drainage system for circulating main steam of the fluidized bed boiler, the throttle rod is added in the drainage pipeline in the main steam drainage system according to the actual running condition of the main steam drainage system, so that the phenomenon of vibration in the running of the main steam drainage pipeline is avoided on the premise that the drainage heat exchange efficiency of the main steam system is guaranteed and the condensate water discharge amount of the main steam system is not influenced, and the potential safety hazard of pipeline explosion caused by long-term vibration pipeline interfaces and welding line disconnection of the drainage pipeline during the running of a unit is avoided.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:
FIG. 1 is a schematic illustration of a dewatering system for circulating fluidized bed boiler main steam in accordance with the present utility model;
FIG. 2 is a schematic illustration of a throttle lever and drain pipe connection for a drain system for circulating fluidized bed boiler main steam in accordance with the present utility model;
FIG. 3 is a schematic illustration of an interference fit of a throttle lever and a drain pipe of a drain system for circulating fluidized bed boiler main steam in accordance with the present utility model.
Detailed Description
It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in a specific case.
The utility model will be described in detail below with reference to the drawings in connection with embodiments.
Examples
As shown in fig. 1, the drainage system for circulating main steam of the fluidized bed boiler comprises a main steam main pipe 1 connected with at least one boiler 31 and a back pressure machine 61, a drainage pipeline 21 is connected between the boiler 31 and the back pressure machine 61 of the main steam main pipe 1, a pipeline drainage expansion vessel 11 is connected at the end part of the drainage pipeline 21 far away from the main steam main pipe 1, and a throttling component is arranged in the drainage pipeline 21. By adopting the structure, the throttle lever 211 is added in the drain pipeline 21 in the main steam drain system according to the actual running condition of the main steam drain system, so that the phenomenon of vibration in the running of the main steam drain pipeline 21 is avoided on the premise of ensuring the drain heat exchange efficiency of the main steam system and not influencing the condensate water discharge amount of the main steam system, and the potential safety hazard of pipeline explosion caused by long-term vibration of the pipeline interface and the disconnection of the welding seam of the drain pipeline during the running of the unit is avoided.
As shown in fig. 1, the throttle member is a throttle lever 211, and a through hole 211a is formed in the throttle lever 211 along the longitudinal direction thereof.
As shown in fig. 2, both ends of the throttle lever 211 are fixedly connected to the drain pipe 21 in a full circle welding manner, respectively. With this structure, the drain pipe 21 is throttled.
As shown in fig. 3, the throttle lever 211 is interference fit with the water drain pipe 21. With this structure, the drain pipe 21 is throttled.
As shown in fig. 1, the drain pipe 21 is provided with a first main steam main drain valve 13 and a second main steam main drain valve 14, and the throttling component is arranged on the lower side of the drain pipe 21, which is positioned on the drain valve of the main steam main 1. With this structure, by providing the first main steam header trap 13 and the second main steam header trap 14, leakage due to the loose valve closure can be prevented.
As shown in fig. 1, the boiler 31 is connected with the main steam mother pipe 1 through a first branch pipe 41, the middle part of the first branch pipe 41 is connected with a second branch pipe 51, the end part of the second branch pipe 51 is connected with a front end pipeline drainage flash tank 91, the middle part of the second branch pipe 51 is connected with a boiler outlet steam front drain valve 2, and one side of the first branch pipe 41 close to the main steam mother pipe 1 is provided with a boiler outlet steam valve 3.
As shown in fig. 1, the number of boilers 31 is 3, and the number of back presses 61 is 2.
As shown in fig. 1, the end of the main steam header 1 is also connected with a medium-pressure accident temperature and pressure reducer 71, a low-pressure accident temperature and pressure reducer 101 and a low-pressure peak-shaving temperature and pressure reducer 81.
Working principle:
when one or two boilers 31 are operated, the rated pressure of the main steam main pipe 1 is 13.7MPa, the temperature is close to the rated temperature of 540 ℃, before a new boiler 31 needs to be started and is vaporized, a steam drain valve 2 (2/5/8) and a steam discharge valve (not shown in the figure) of the boiler 31 are opened before the steam outlet of the boiler are opened, a steam valve 3 (3/6/9) of the boiler outlet is closed for heating and boosting, and when the air pressure and the air temperature are slightly lower than the air pressure of the main steam pipe, the air temperature can be prepared and vaporized; before the boiler 31 is connected with steam, the first main steam main drain valve 13 and the second main steam main drain valve 14 (14/78/91/96) are required to be opened, so that water hammer caused by residual condensed water in a pipeline is prevented, and then the boiler outlet steam valve 3 (3/6/9) is opened and is combined with the main steam main 1.
After the first main steam main drain valve 13 and the second main steam main drain valve 14 (14/78/91/96) are opened during the steam merging of the boiler 31, the medium flow in the main steam main 1 is reduced under the action of the throttle lever 211, the pressure is reduced, the generated impact is reduced, and the pipeline vibration is avoided; and during steam merging, the main steam main pipe 1 is in a use state, condensed water is almost not contained in the main steam main pipe 1, the throttle lever 211 is additionally arranged on the drainage pipeline 21, the pipeline caliber of the drainage pipeline 21 completely meets the steam merging and drainage requirements, at the moment, the first main steam main pipe drain valve 13 and the second main steam main pipe drain valve 14 (14/78/91/96) at 4 positions on the main steam main pipe 1 are opened for safety guarantee, and the heat exchange efficiency during steam merging is maintained.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (8)
1. A hydrophobic system for circulating main steam of a fluidized bed boiler, comprising a main steam header connected to at least one boiler and a back pressure machine, characterized in that: the main steam main pipe is connected with a drainage pipeline at the position between the boiler and the back pressure machine, a pipeline drainage expansion device is connected at the end part of the drainage pipeline far away from the main steam main pipe, and a throttling part is arranged in the drainage pipeline.
2. A hydrophobic system for circulating fluidized bed boiler main steam according to claim 1, characterized in that: the throttle component is a throttle rod, and the throttle rod is penetrated with a through hole along the length direction of the throttle rod.
3. A hydrophobic system for circulating fluidized bed boiler main steam according to claim 2, characterized in that: and two ends of the throttle rod are fixedly connected with the drainage pipeline in a whole circle welding mode respectively.
4. A hydrophobic system for circulating fluidized bed boiler main steam according to claim 2, characterized in that: the throttle lever is in interference fit with the drainage pipeline.
5. A hydrophobic system for circulating fluidized bed boiler main steam according to claim 1 or 3 or 4, characterized in that: the throttle component is arranged on the lower side of the drain pipeline, which is positioned on the main steam main drain valve.
6. A hydrophobic system for circulating fluidized bed boiler main steam according to claim 1, characterized in that: the boiler is connected with a main steam main pipe through a first branch pipe, the middle part of the first branch pipe is connected with a second branch pipe, the end part of the second branch pipe is connected with a front end pipeline drainage flash tank, the middle part of the second branch pipe is connected with a boiler outlet steam front drain valve, and one side of the first branch pipe, which is close to the main steam main pipe, is provided with a boiler outlet steam valve.
7. A hydrophobic system for circulating fluidized bed boiler main steam according to claim 1, characterized in that: the number of the boilers is 3, and the number of the back presses is 2.
8. A hydrophobic system for circulating fluidized bed boiler main steam according to claim 1, characterized in that: the end part of the main steam main pipe is also connected with a medium-pressure accident temperature and pressure reducer, a low-pressure accident temperature and pressure reducer and a low-pressure peak regulation temperature and pressure reducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321209624.5U CN219867867U (en) | 2023-05-18 | 2023-05-18 | Drainage system for circulating main steam of fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321209624.5U CN219867867U (en) | 2023-05-18 | 2023-05-18 | Drainage system for circulating main steam of fluidized bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219867867U true CN219867867U (en) | 2023-10-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321209624.5U Active CN219867867U (en) | 2023-05-18 | 2023-05-18 | Drainage system for circulating main steam of fluidized bed boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219867867U (en) |
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2023
- 2023-05-18 CN CN202321209624.5U patent/CN219867867U/en active Active
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