CN217582635U - Boiler feed pump mechanical seal washes temperature control system - Google Patents
Boiler feed pump mechanical seal washes temperature control system Download PDFInfo
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- CN217582635U CN217582635U CN202221689818.5U CN202221689818U CN217582635U CN 217582635 U CN217582635 U CN 217582635U CN 202221689818 U CN202221689818 U CN 202221689818U CN 217582635 U CN217582635 U CN 217582635U
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- flushing
- temperature
- circulation loop
- mechanical seal
- pump body
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- 238000011010 flushing procedure Methods 0.000 claims abstract description 74
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000007788 liquid Substances 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 238000007789 sealing Methods 0.000 abstract description 12
- 239000000110 cooling liquid Substances 0.000 abstract description 11
- 238000005406 washing Methods 0.000 description 23
- 230000002159 abnormal effect Effects 0.000 description 6
- 238000009529 body temperature measurement Methods 0.000 description 5
- 238000010248 power generation Methods 0.000 description 5
- 239000000498 cooling water Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model relates to a boiler of thermal power plant feeds water technical field, concretely relates to boiler feed pump mechanical seal washes temperature control system, include: a flushing circulation loop is communicated between the outlet of the sealing cavity of the pump body and the inlet of the sealing cavity of the pump body; the heat exchange assembly is sleeved on the flushing circulation loop; and the standby flushing branch is communicated with the flushing circulating loop. When the temperature of the cooling liquid in the flushing circulation loop rises beyond a set range, the standby flushing cooling liquid with lower temperature is introduced into the flushing circulation loop through the standby flushing branch, so that the accelerated damage of the pump body caused by the continuous operation of the pump body after the temperature of the cooling liquid exceeds a preset temperature can be effectively prevented, and the normal operation of the pump body is maintained.
Description
Technical Field
The utility model relates to a boiler of thermal power plant feeds water technical field, concretely relates to boiler feed pump mechanical seal washes temperature control system.
Background
The boiler feed pump of the thermal power plant is used for conveying the feed water with a certain pressure and temperature at the outlet of the deaerator and with the function of removing the peroxide to the boiler after the pressure is increased so as to meet the requirement of the boiler water. The pressure and flow of the feed water need to be regulated and stabilized during the operation of the boiler feed water pump, and power guarantee is provided for the circulation of a hydrodynamic force and a thermodynamic system. What boiler feed water pump sent is the highly compressed feedwater of high temperature, through setting up sealed water, prevents on the one hand that the water in the feed water pump from leaking through the clearance between axle and the sealing member, and on the other hand takes away the heat that the pivot and the pump body metal transmission of feedwater through the pump give the bearing, prevents that the bearing temperature from rising.
The mechanical seal of the water supply pump adopts a PLAN23 (internal flushing with a circulating sleeve) flushing scheme, and after the flushing circulating liquid of the mechanical seal is pressurized by a water supply pump moving ring in a screw pump mode, the flushing circulating liquid returns to the inlet of the sealing cavity from the outlet of the sealing cavity through a mechanical seal flushing circulating liquid cooler to flush the mechanical seal, and the above steps are repeated in a circulating manner.
Because reasons such as poor or the feed water quality of water poor or pump package improper operation of mechanical seal installation quality, the water-feeding pump can appear the abnormal operation after long-term operation mechanical seal flushing circulation system, influences the water-feeding pump normal operating, mainly has following influence: (1) The feed water leaks out through the gap between the shaft and the mechanical seal, so that working medium loss and visual pollution are caused; (2) The high-temperature water supply transfers heat to the bearing, so that the temperature of the bearing is increased or the bearing is burnt; (3) Sealing water is lost, a water film between the high-speed rotating shaft of the water supply pump and the mechanical seal is damaged, or friction occurs, the vibration of the water supply pump is increased, and equipment is damaged after the water supply pump continues to operate. After a flushing circulation system of a PLAN23 flushing scheme in the existing sealing standard flushing scheme works abnormally, a boiler feed pump must be stopped for maintenance, so that a boiler cannot normally run, the output is limited, even the running has to be stopped, and the influence on the normal power generation work of a thermal power plant is large.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the utility model lies in overcoming the boiler feed pump flushing system work anomaly back feed pump of PLAN23 washing scheme and need shut down the maintenance, influences the defect of power generation system normal operating to a boiler feed pump mechanical seal washes temperature control system is provided.
In order to solve the technical problem, the utility model provides a boiler feed pump mechanical seal washes temperature control system for mechanical seal PLAN23 washes the scheme, include:
a flushing circulation loop is communicated between the outlet of the sealing cavity of the pump body and the inlet of the sealing cavity of the pump body;
the heat exchange assembly is sleeved on the flushing circulation loop;
and the standby flushing branch is communicated with the flushing circulating loop.
Optionally, a regulating valve is installed on the spare flushing branch.
Optionally, a first temperature measuring point and a second temperature measuring point are arranged on the flushing circulation loop, the first temperature measuring point is arranged at one end of the flushing circulation loop, which is communicated with the outlet of the sealed cavity of the pump body, and the second temperature measuring point is arranged at one end of the flushing circulation loop, which is communicated with the inlet of the sealed cavity of the pump body.
Optionally, a liquid pressure measuring point is further arranged at one end of the flushing circulation loop, which is communicated with the inlet of the sealed cavity of the pump body.
Optionally, the heat exchange assembly comprises a cold side pipeline and a hot side pipeline, the hot side pipeline is sleeved with the flushing circulation loop, and the cold side pipeline is communicated with the cooling loop.
Optionally, a backup flush branch communicates on the flush circulation loop between the heat exchange assembly and the inlet of the capsule.
The utility model discloses technical scheme has following advantage:
1. the utility model provides a boiler feed pump mechanical seal washes temperature control system, include: a flushing circulation loop is communicated between the outlet of the sealing cavity of the pump body and the inlet of the sealing cavity of the pump body; the heat exchange assembly is sleeved on the flushing circulation loop; and the standby flushing branch is communicated with the flushing circulating loop. When utilizing washing temperature control system to wash the accuse temperature to the water-feeding pump mechanical seal of boiler among the power generation system in the thermal power plant, the circulation cooling liquid that lets in the circulation flow among the washing circulation circuit controls the temperature to mechanical seal, when the coolant temperature rise in the washing circulation circuit surpassed the settlement scope, through reserve washing branch road, introduce the lower reserve washing cooling liquid of temperature to among the washing circulation circuit, the flow of the low-temperature cooling liquid that introduces among the washing circulation circuit through reserve washing branch road according to the temperature data control of cooling liquid among the washing circulation circuit, can effectively prevent the pump body that the pump body continued the operation leads to after the cooling liquid temperature surpassed predetermined temperature from damaging with higher speed, in order to maintain the normal operating of pump body.
2. The utility model provides a boiler feed pump mechanical seal washes temperature control system installs adjusting valve on the reserve washing branch road. The flow of the cooling liquid in the standby flushing branch is adjusted by arranging the adjusting valve, so that the temperature of the cooling liquid in the flushing temperature control system is conveniently controlled.
3. The utility model provides a boiler feed pump mechanical seal washes temperature control system is provided with first temperature measurement station and second temperature measurement station on the washing circulation circuit, and the one end of washing circulation circuit and the sealed chamber export intercommunication of pump body is located to the first temperature measurement station, and the one end of washing circulation circuit and the sealed chamber import intercommunication of pump body is located to the second temperature measurement station. The temperature of the inlet and outlet of the sealed cavity of the pump body is respectively detected by the first temperature measuring point and the second temperature measuring point, the flow of the cooling liquid in the standby flushing branch is fed back and adjusted according to the temperature value of the inlet and outlet of the sealed cavity of the pump body, and the temperature control precision of the flushing temperature control system is improved when the temperature of the system is abnormal.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following descriptions are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of a boiler feed pump mechanical seal flushing temperature control system according to an embodiment of the present invention.
Description of the reference numerals: 1. a pump body; 2. a heat exchange assembly; 3. a standby flushing branch; 4. a flush circulation loop; 5. a cooling circuit; 6. adjusting the valve; 7. a first temperature measurement point; 8. a second temperature measuring point; 9. measuring a liquid pressure point; 10. an outlet of the sealed cavity; 11. the chamber inlet is sealed.
Detailed Description
The technical solutions of the present invention will be described more clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
Fig. 1 shows that the flushing temperature control system of the boiler feed pump mechanical seal PLAN PLAN23 provided by this embodiment is used for controlling the temperature of the boiler feed pump mechanical seal in the power generation system of the thermal power plant, and solves the technical problem that the boiler feed pump must be shut down for maintenance after the flushing circulation system of the PLAN23 flushing PLAN in the prior art is abnormal in operation, which results in abnormal operation of the boiler. Boiler feed pump mechanical seal washes temperature control system includes: pump body 1, heat exchange assemblies 2 and reserve washing branch 3.
A flushing circulation circuit 4 is communicated between the sealed cavity outlet 10 of the pump body 1 and the sealed cavity inlet 11 of the pump body 1, and the cooling medium in the flushing circulation circuit is flushing water in the embodiment.
The heat exchange component 2 is sleeved and arranged on the flushing circulation loop. The heat exchange assembly 2 comprises a cold side pipeline and a hot side pipeline, the hot side pipeline and the flushing circulation loop are sleeved and mounted, and the cold side pipeline is communicated with a cooling loop. And cooling water is introduced into the cooling loop 5 to indirectly exchange heat and reduce the temperature of flushing water in a hot-side pipeline.
A regulating valve 6 is arranged on the standby flushing branch 3. The flushing circulation loop 4 is provided with a first temperature measuring point 7 and a second temperature measuring point 8, the first temperature measuring point 7 is arranged at one end of the flushing circulation loop 4 communicated with a sealed cavity outlet 10 of the pump body 1, and the second temperature measuring point 8 is arranged at one end of the flushing circulation loop 4 communicated with a sealed cavity inlet 11 of the pump body 1. In order to improve the temperature control precision of the standby flushing branch 3, the standby flushing branch 3 is communicated with a flushing circulating loop between the heat exchange assembly 2 and the inlet 11 of the sealed cavity. And a liquid pressure measuring point 9 is also arranged at one end of the flushing circulation loop 4 communicated with the inlet 11 of the sealing cavity of the pump body 1.
The power generation system is in the operation process, through washing circulation circuit 4 to pump body 1 mechanical seal cool down, lets in the sparge water that circulates and flows in washing circulation circuit 4, lets in cooling water in heat exchange assemblies 2 with the cooling circuit 5 of cold side pipeline intercommunication, utilizes the cooling water to cool down to the sparge water, with the temperature of control wash circulation circuit 4 in the sparge water, and then control pump body 1 mechanical seal's operating temperature. When the temperature of the mechanical seal of the pump body 1 is abnormal, which causes the temperature of the flushing water in the flushing circulation loop 4 to rise and exceed the normal temperature range, if no rescue measures are taken, the pump body 1 will be damaged quickly, and the service life of the water feeding pump is shortened seriously. At the moment, a regulating valve 6 is slightly opened in the washing temperature control system, low-temperature standby washing water is introduced by using a standby washing branch 3, and the opening degree of the regulating valve 6 is adjusted according to the water pressure data of a liquid pressure measuring point 9 and the temperature data of a first temperature measuring point 7 and a second temperature measuring point 8, so that the temperature of the washing water at an inlet 11 of a sealed cavity of the pump body 1 is accurately controlled, and the normal operation of the water feeding pump is maintained.
After the temperature of the pump body 1 is abnormal in operation, the standby washing water is introduced through the standby washing branch 3, so that the temperature of a bearing of the pump body 1 is prevented from rising and being burnt, a water film between a pump shaft and a mechanical seal is maintained, dynamic and static friction and the like are prevented from occurring, the normal operation of a water supply pump is maintained, and the adverse effect on production caused by the limited output of a boiler or even the shutdown of the boiler is avoided. It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.
Claims (6)
1. A boiler feed pump mechanical seal washes temperature control system, characterized by, is used for mechanical seal PLAN23 to wash the scheme, includes:
a flushing circulation loop (4) is communicated between a sealed cavity outlet (10) and a sealed cavity inlet (11) of the pump body (1);
the heat exchange assembly (2) is sleeved on the flushing circulation loop;
and the standby flushing branch (3) is communicated with the flushing circulating loop.
2. The boiler feed water pump mechanical seal flushing temperature control system according to claim 1, characterized in that a regulating valve (6) is mounted on the backup flushing branch (3).
3. The boiler feed water pump mechanical seal flushing temperature control system according to claim 1 or 2, characterized in that a first temperature measuring point (7) and a second temperature measuring point (8) are arranged on the flushing circulation loop (4), the first temperature measuring point (7) is arranged at one end of the flushing circulation loop (4) communicated with a seal cavity outlet (10) of the pump body (1), and the second temperature measuring point (8) is arranged at one end of the flushing circulation loop (4) communicated with a seal cavity inlet (11) of the pump body (1).
4. The boiler feed water pump mechanical seal flushing temperature control system according to claim 3, characterized in that one end of the flushing circulation loop (4) communicated with the inlet (11) of the seal cavity of the pump body (1) is further provided with a liquid pressure measuring point (9).
5. The boiler feed pump mechanical seal flushing temperature control system according to claim 1 or 2, characterized in that the heat exchange assembly (2) comprises a cold side pipeline and a hot side pipeline, the hot side pipeline is sleeved with the flushing circulation loop, and the cold side pipeline is communicated with a cooling loop (5).
6. The boiler feed pump mechanical seal flushing temperature control system of claim 1 or 2, characterized in that the backup flushing branch (3) communicates on the flushing circulation loop between the heat exchange assembly (2) and the seal chamber inlet (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221689818.5U CN217582635U (en) | 2022-06-30 | 2022-06-30 | Boiler feed pump mechanical seal washes temperature control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221689818.5U CN217582635U (en) | 2022-06-30 | 2022-06-30 | Boiler feed pump mechanical seal washes temperature control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217582635U true CN217582635U (en) | 2022-10-14 |
Family
ID=83534661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221689818.5U Active CN217582635U (en) | 2022-06-30 | 2022-06-30 | Boiler feed pump mechanical seal washes temperature control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217582635U (en) |
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2022
- 2022-06-30 CN CN202221689818.5U patent/CN217582635U/en active Active
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