CN208686439U - A kind of shaft seal heater system suitable for high back pressure thermal power plant unit - Google Patents
A kind of shaft seal heater system suitable for high back pressure thermal power plant unit Download PDFInfo
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- CN208686439U CN208686439U CN201821418484.1U CN201821418484U CN208686439U CN 208686439 U CN208686439 U CN 208686439U CN 201821418484 U CN201821418484 U CN 201821418484U CN 208686439 U CN208686439 U CN 208686439U
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- gland heater
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Abstract
The utility model discloses a kind of shaft seal heater systems suitable for high back pressure thermal power plant unit, including gland seal system to come steam pipe road, the first gland heater, the second gland heater, hot well and No. 8 low-pressure heaters；Gland seal system comes steam pipe road and is connected with the heat release side entrance of the heat release side entrance of the first gland heater and the second gland heater, the heat release side outlet and the heat release side outlet of the second gland heater of first gland heater and the heat release side entrance of hot well are connected, the heat release side outlet of hot well is connected with the heat absorption side entrance of the second gland heater, the heat absorption side outlet of second gland heater is connected with the entrance of No. 8 low-pressure heaters, heat supply network return water main pipe is connected with the heat absorption side entrance of hot well, heat supply network main water outlet pipe is connected with the heat absorption side outlet of hot well, the heat absorption side entrance of first gland heater and heat absorption side outlet are connected with heat supply network return water main pipe, the system can be effectively solved the problem of gland heater exchange capability of heat deficiency.
Description
Technical field
The utility model belongs to large-scale thermal power machine group high efficiency thermoelectric co-production technology field, is related to a kind of suitable for highback
Press the shaft seal heater system of thermal power plant unit.
Background technique
In recent years, the country has a large amount of 135MW~300MW grade units high back pressure heat supplies to be transformed, to improve unit confession
Thermal energy power and economical effect of heat-supply.Typical high back pressure heat supply be in heat supply period by unit operation back pressure improve to 40kPa~
Low pressure (LP) cylinder steam discharge is used for heat supply by 50kPa, and the cooling working medium of unit is switched to heat supply network recirculated water.
Since unit original design and operation back pressure is generally in 4kPa~7kPa or so, summer operating mode design back-pressure is also only reached
11.8kPa, and greatly improving unit exhaust pressure to 40kPa~50kPa during high back pressure heat supply, unit condensing water temperature by
40 DEG C originally are increased to 80 DEG C or so, thus cause original gland heater exchange capability of heat insufficient, so that unit heat supply period is high
A large amount of discharge of steam cause condensed water and thermal loss, exhaust outlet emits white vapour for a long time, influences unit fortune to atmosphere when back pressure operation
Row economy and corporate image.
Utility model content
The shortcomings that the purpose of the utility model is to overcome the above-mentioned prior arts provides a kind of suitable for high back pressure heat supply
The shaft seal heater system of unit, the system can be effectively solved the problem of gland heater exchange capability of heat deficiency.
In order to achieve the above objectives, the shaft seal heater system packet described in the utility model suitable for high back pressure thermal power plant unit
It includes gland seal system and comes steam pipe road, the first gland heater, the second gland heater, hot well, No. 8 low-pressure heaters, heat supply network return water
Main pipe and heat supply network main water outlet pipe；
Gland seal system comes the heat release side entrance in steam pipe road and the first gland heater and the cold side of the second gland heater
Entrance is connected, the heat release of the heat release side outlet of the first gland heater and the heat release side outlet of the second gland heater and hot well
Side entrance is connected, and the heat release side outlet of hot well is connected with the heat absorption side entrance of the second gland heater, the heating of the second axle envelope
The heat absorption side outlet of device is connected with the entrance of No. 8 low-pressure heaters, and heat supply network return water main pipe is connected with the heat absorption side entrance of hot well
Logical, heat supply network main water outlet pipe is connected with the heat absorption side outlet of hot well, and the heat absorption side entrance of the first gland heater and heat absorbing side go out
Mouth is connected with heat supply network return water main pipe.
The heat release side outlet of hot well is connected through condensate pump with the heat absorption side entrance of the second gland heater.
The first valve is provided between the heat release side outlet and condensate pump of hot well.
The second valve is provided in heat supply network return water main pipe；Third valve and heat supply network water pump are provided in heat supply network main water outlet pipe.
The cooling Temperature of Working for entering the first gland heater heat absorbing side is 50 DEG C.
The cooling Temperature of Working for entering the second gland heater heat absorbing side is 80 DEG C.
The heat exchange area of first gland heater is the 80% of the second gland heater heat exchange area.
The utility model has the following beneficial effects:
Shaft seal heater system described in the utility model suitable for high back pressure thermal power plant unit passes through when specific operation
Increase the first new gland heater on the basis of the second gland heater, wherein the cooling working medium of the first gland heater
From hot net water, so that the first gland heater is in parallel with the second gland heater, to improve the heat-energy transducer of gland heater
Power prevents gland seal system steaming to thoroughly solve the problems, such as unit gland heater exchange capability of heat deficiency when high back pressure heat supply running
Thermal loss caused by vapour outlet, condensate loss and white vapour phenomenon is emitted, structure is simple, and reliable for operation, cost of investment is low.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Wherein, 1 it is the first gland heater, 2 be the second gland heater, 3 be condensate pump, 4 is heat supply network water pump.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing:
With reference to Fig. 1, the shaft seal heater system described in the utility model suitable for high back pressure thermal power plant unit includes axle envelope
System comes steam pipe road, the first gland heater 1, the second gland heater 2, hot well, No. 8 low-pressure heaters, heat supply network return water main pipe
And heat supply network main water outlet pipe；Gland seal system carrys out heat release side entrance and second gland heater 2 in steam pipe road and the first gland heater 1
Heat release side entrance be connected, the heat release side outlet of the heat release side outlet of the first gland heater 1 and the second gland heater 2 with
The heat release side entrance of hot well is connected, and the heat release side outlet of hot well is connected with the heat absorption side entrance of the second gland heater 2, the
The heat absorption side outlet of two gland heaters 2 is connected with the entrance of No. 8 low-pressure heaters, the heat absorption of heat supply network return water main pipe and hot well
Side entrance is connected, and heat supply network main water outlet pipe is connected with the heat absorption side outlet of hot well, the heat absorption side entrance of the first gland heater 1
And heat absorption side outlet is connected with heat supply network return water main pipe.
The heat release side outlet of hot well is connected through condensate pump 3 with the heat absorption side entrance of the second gland heater 2；Hot well
The first valve is provided between heat release side outlet and condensate pump 3；The second valve is provided in heat supply network return water main pipe；Heat supply network water outlet
Third valve and heat supply network water pump 4 are provided in main pipe.
Wherein, the cooling Temperature of Working for entering 1 heat absorbing side of the first gland heater is 50 DEG C；The second axle envelope is entered to add
The cooling Temperature of Working of hot 2 heat absorbing side of device is 80 DEG C；The heat exchange area of first gland heater 1 is that the second gland heater 2 changes
The 80% of heat area.
To solve the problems in background technique, in practical operation, according to the bigger gland heater of heat exchange area,
Effect may be not obvious, to find out its cause, being that unit condensing water temperature is excessively high, lead to the logarithm temperature of gland heater heat transfer process
Difference is substantially reduced, even if original gland heater to be changed to the new gland heater of 150% heat exchange area, effect also reaches not
To the effect of former normal back pressure operation.Therefore according to the gland heater of bigger heat exchange area, first is that site layout project space is deposited
In difficulty, second is that equipment investment cost significantly increases.
The utility model is in specific works, by increasing by the first gland heater 1 so that the first gland heater 1 with
Second gland heater, 2 parallel running, wherein the heat exchange area of the first gland heater 1 is 2 heat-transfer surface of the second gland heater
Long-pending 80%, the condensed water that the cooling working medium of the second gland heater 2 is 80 DEG C or so, the cooling working medium of the first gland heater 1 are
50 DEG C of heat supply network return water solves gland heater heat exchange so as to comprehensive in terms of heat exchange area and logarithm heat transfer temperature difference two
The problem of scarce capacity, achievees the purpose that recycle condensed water and heat, improves unit performance driving economy.
In addition, condensed water enters No. 8 low-pressure heaters after 2 temperature raising of the second gland heater, hot net water is through the first axle envelope
Enter high back pressure thermal power plant unit condenser after 1 temperature raising of heater, both solves heat caused by gland heater exchange capability of heat deficiency
The problem of amount and condensate loss, while realizing the recycling and utilization of heat, guarantee unit performance driving economy.
Claims (7)
1. a kind of shaft seal heater system suitable for high back pressure thermal power plant unit, which is characterized in that carry out steam pipe including gland seal system
Road, the first gland heater (1), the second gland heater (2), hot well, No. 8 low-pressure heaters, heat supply network return water main pipe and heat supply network
Main water outlet pipe；
Gland seal system comes the heat release side entrance in steam pipe road and the first gland heater (1) and the heat release of the second gland heater (2)
Side entrance is connected, the heat release side outlet and heat of the heat release side outlet of the first gland heater (1) and the second gland heater (2)
The heat release side entrance of well is connected, and the heat release side outlet of hot well is connected with the heat absorption side entrance of the second gland heater (2), the
The heat absorption side outlet of two gland heaters (2) is connected with the entrance of No. 8 low-pressure heaters, the suction of heat supply network return water main pipe and hot well
Hot side entrance is connected, and heat supply network main water outlet pipe is connected with the heat absorption side outlet of hot well, the heat absorbing side of the first gland heater (1)
Entrance and heat absorption side outlet are connected with heat supply network return water main pipe.
2. the shaft seal heater system according to claim 1 suitable for high back pressure thermal power plant unit, which is characterized in that hot well
Heat release side outlet be connected through condensate pump (3) with the heat absorption side entrance of the second gland heater (2).
3. the shaft seal heater system according to claim 1 suitable for high back pressure thermal power plant unit, which is characterized in that hot well
Heat release side outlet and condensate pump (3) between be provided with the first valve.
4. the shaft seal heater system according to claim 3 suitable for high back pressure thermal power plant unit, which is characterized in that heat supply network
The second valve is provided in return water main pipe；Third valve and heat supply network water pump (4) are provided in heat supply network main water outlet pipe.
5. the shaft seal heater system according to claim 1 suitable for high back pressure thermal power plant unit, which is characterized in that enter
Cooling Temperature of Working to the first gland heater (1) heat absorbing side is 50 DEG C.
6. the shaft seal heater system according to claim 1 suitable for high back pressure thermal power plant unit, which is characterized in that enter
Cooling Temperature of Working to the second gland heater (2) heat absorbing side is 80 DEG C.
7. the shaft seal heater system according to claim 1 suitable for high back pressure thermal power plant unit, which is characterized in that first
The heat exchange area of gland heater (1) is the 80% of the second gland heater (2) heat exchange area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821418484.1U CN208686439U (en) | 2018-08-30 | 2018-08-30 | A kind of shaft seal heater system suitable for high back pressure thermal power plant unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821418484.1U CN208686439U (en) | 2018-08-30 | 2018-08-30 | A kind of shaft seal heater system suitable for high back pressure thermal power plant unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208686439U true CN208686439U (en) | 2019-04-02 |
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ID=65887550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821418484.1U Active CN208686439U (en) | 2018-08-30 | 2018-08-30 | A kind of shaft seal heater system suitable for high back pressure thermal power plant unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208686439U (en) |
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2018
- 2018-08-30 CN CN201821418484.1U patent/CN208686439U/en active Active
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