CN220750107U - Heating pipe structure of generator set heater - Google Patents
Heating pipe structure of generator set heater Download PDFInfo
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- CN220750107U CN220750107U CN202322302764.3U CN202322302764U CN220750107U CN 220750107 U CN220750107 U CN 220750107U CN 202322302764 U CN202322302764 U CN 202322302764U CN 220750107 U CN220750107 U CN 220750107U
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 238000011084 recovery Methods 0.000 claims description 12
- 238000009833 condensation Methods 0.000 claims description 6
- 230000005494 condensation Effects 0.000 claims description 6
- 238000004064 recycling Methods 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000002485 combustion reaction Methods 0.000 abstract description 5
- 238000011010 flushing procedure Methods 0.000 description 4
- 230000035939 shock Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Abstract
The utility model provides a heating pipe structure of a generator set heater, which relates to the technical field of generator sets and comprises a high-temperature reheater pipeline, a high-temperature superheater pipeline, a high cylinder, a middle-low cylinder, a first-stage bypass, a second-stage bypass and a high-adding group, wherein the output end of the high-temperature superheater pipeline is connected with the high cylinder, the high-temperature reheater pipeline is connected with the middle-low cylinder through the high cylinder, the high-adding group comprises a third high-pressure heater, a second high-pressure heater and a first high-pressure heater which are mutually connected, the discharge end of the high cylinder is connected with a cold recycling pipeline, and the cold recycling pipeline is connected to a boiler cold recycling pipeline; a pressure reducing pipeline is connected between the second high-pressure heater and the cold recycling pipeline, and a pressure reducing valve is arranged on the pressure reducing pipeline; according to the utility model, the second high-pressure heater is put into the steam turbine before the steam turbine is turned on, the pipeline is warmed, the subsequent water supply temperature is improved, the combustion adjustment of the boiler is facilitated, the starting condition of the unit is greatly improved, and the steam turbine has great benefits in prolonging the service life and prolonging the height.
Description
Technical Field
The utility model relates to the technical field of generator sets, in particular to a heating pipe structure of a generator set heater.
Background
In the prior art, subcritical, supercritical and ultra supercritical thermal power generating units are started in a hot state, particularly a boiler, due to the fact that the low temperature of water supply affects the starting time before a steam turbine is started, if the low temperature of water supply causes supercooling of a boiler economizer and a water-cooled wall, thermal stress is generated, the service life of pipes is reduced, a large amount of unsaturated steam is discharged to a condenser through a first-stage bypass and a second-stage bypass in the starting process, a large amount of steam which does not do work is recovered to the condenser, heat is wasted, meanwhile, the thermal load of the condenser is increased, and safe and economic operation of a thermal power plant is not facilitated;
in order to increase the water supply temperature before the ignition of a boiler, an auxiliary steam heating deaerator is generally used for heating the water supply, the water supply temperature is synchronously reduced along with the increase of the starting flow, so that the steam yield of the boiler is reduced, the starting time is prolonged, and meanwhile, the deaerator also consumes more auxiliary steam to heat the water supply, so that the pressure of an auxiliary steam system is lower, and the stable operation of other systems is influenced.
Disclosure of Invention
Aiming at the problems, the utility model provides a heating pipe structure of a generator set heater, which is beneficial to boiler combustion adjustment, greatly improves set starting conditions and has great benefit for prolonging the service life.
In order to achieve the purpose of the utility model, the utility model is realized by the following technical scheme: the heating pipe structure of the generator set heater comprises a high-temperature reheater pipeline, a high-temperature superheater pipeline, a high cylinder, a middle-low cylinder, a primary bypass, a secondary bypass and a high-pressure adding group, wherein the output end of the high-temperature superheater pipeline is connected with the high cylinder, the high-temperature reheater pipeline is connected with the middle-low cylinder through the high cylinder, the high-pressure adding group comprises a third high-pressure heater, a second high-pressure heater and a first high-pressure heater which are mutually connected, the discharge end of the high cylinder is connected with a cold re-pipeline, and the cold re-pipeline is connected to a boiler cold re-system;
the high-pressure boiler is characterized in that a pressure reducing pipeline is connected between the second high-pressure heater and the cold re-pipeline, a pressure reducing valve is arranged on the pressure reducing pipeline, the primary bypass is connected between the high-temperature superheater pipeline and the cold re-pipeline, a high-discharge check valve is arranged at the upper section of the cold re-pipeline, the outlet ends of the high cylinder and the middle low cylinder are connected with a secondary bypass, the secondary bypass is connected with a condenser, the discharge end of the condenser is connected with a high-pressure group, and the discharge end of the high-pressure group is connected with a boiler.
The further improvement is that: the outlet end of the high cylinder is connected with the secondary bypass through a first pipeline, and the outlet end of the middle and low cylinder is connected with the first pipeline through an outlet pipe.
The further improvement is that: and a second pipeline is connected between the high cylinder and the middle low cylinder, and the high-temperature reheater pipeline is connected into the middle low cylinder through the second pipeline.
The further improvement is that: the exhaust end of the condenser is connected with a third pipeline, and the output end of the third pipeline is connected with a high-pressure adding group.
The further improvement is that: the discharge end of the high-pressure adding group is connected with a fourth pipeline, and the fourth pipeline is used for being connected with a boiler.
The further improvement is that: one side of the primary bypass is connected with a water supply pipeline, the water supply pipeline is connected with a water supply pump, one side of the secondary bypass is connected with a condensation water pipeline, and the condensation water pipeline is connected with condensation water.
The further improvement is that: the condenser is connected with a recovery pipeline, and the recovery pipeline is used for accessing a thermal recovery medium.
The further improvement is that: the output section of the high-temperature superheater pipeline is connected with a branch pipeline, and the branch pipeline is connected to the high cylinder.
The beneficial effects of the utility model are as follows:
1. according to the utility model, the second high-pressure heater is put into the steam turbine before the steam turbine is turned on, the pipeline is warmed, the subsequent water supply temperature is improved, the combustion adjustment of the boiler is facilitated, the starting condition of the unit is greatly improved, and the steam turbine has great benefits in prolonging the service life and prolonging the height.
2. According to the utility model, a large amount of heated kang steam is introduced by putting the second high-pressure heater (positioned behind the high-row check valve), water drainage can be recovered while water supply is heated, and the economy and safety of the unit are greatly improved.
3. According to the utility model, the first-stage bypass and the second high-pressure heater are used for heating the rear section of the cold re-pipeline, so that the water supply temperature is greatly increased, the follow-up main re-heating steam is maintained to run under constant flushing pressure, the main re-heating steam passes through the high-temperature re-heater pipeline, and after the main re-heating steam is used, the main re-heating steam is connected into the second-stage bypass to the condenser for recovering working media, and the thermal shock to the condenser is reduced.
Drawings
Fig. 1 is a front view of the present utility model.
Wherein: 1. a high temperature reheater pipe; 2. a high temperature superheater line; 3. a high cylinder; 4. a middle-low cylinder; 5. a primary bypass; 6. a secondary bypass; 7. a third high-pressure heater; 8. a second high-pressure heater; 9. a first high-pressure heater; 10. a cold recycling pipeline; 11. a pressure reducing line; 12. a pressure reducing valve; 13. a high-row check valve; 14. a condenser; 15. a first pipeline; 16. a second pipeline; 17. a third pipeline; 18. a fourth pipeline; 19. a water supply line; 20. a condensate line; 21. a recovery pipeline; 22. and a branch pipeline.
Detailed Description
The present utility model will be further described in detail with reference to the following examples, which are only for the purpose of illustrating the utility model and are not to be construed as limiting the scope of the utility model.
Example 1
According to the embodiment shown in fig. 1, a heating pipe structure of a generator set heater is provided, the heating pipe structure comprises a high-temperature superheater pipeline 1, a high-temperature superheater pipeline 2, a high cylinder 3, a middle-low cylinder 4, a primary bypass 5, a secondary bypass 6 and a high-pressure adding group, wherein the output end of the high-temperature superheater pipeline 2 is connected with the high cylinder 3, the high-temperature superheater pipeline 1 is connected with the middle-low cylinder 4 through the high cylinder 3, the high-pressure adding group comprises a third high-pressure heater 7, a second high-pressure heater 8 and a first high-pressure heater 9 which are connected with each other, the discharge end of the high cylinder 3 is connected with a cold re-pipeline 10, and the cold re-pipeline 10 is connected with a boiler cold re-;
the high-pressure boiler is characterized in that a pressure reducing pipeline 11 is connected between the second high-pressure heater 8 and the cold re-pipeline 10, a pressure reducing valve 12 is arranged on the pressure reducing pipeline 11, the primary bypass 5 is connected between the high-temperature superheater pipeline 2 and the cold re-pipeline 10, a high-discharge check valve 13 is arranged at the upper section of the cold re-pipeline 10, the outlet ends of the high cylinder 3 and the middle low cylinder 4 are connected into the secondary bypass 6, the secondary bypass 6 is connected with a condenser 14, the discharge end of the condenser 14 is connected with a high-pressure adding group, and the discharge end of the high-pressure adding group is connected with a boiler. When the boiler is used, the primary bypass 5 and the secondary bypass 6 adopt a structure type of reducing pressure and then reducing temperature, and the high cylinder 3 and the middle and low cylinder 4 are combined to start the initial stage of boiler ignition, and the boiler can be put into after boosting. The general design capacity is 40% BMCR, and the starting of the machine set under the working conditions of cold state, warm state, hot state and extreme heat state can be completely met; when the heating pipe is bypassed, the second high-pressure heater 8 can be synchronously input with the first-stage bypass 5. Before the second high-pressure heater 8 is put into operation, the opening condition of the steam inlet electric door and the steam inlet check door of the second high-pressure heater 8 is forced, and the opening control is carried out in the DCS. After the second high-pressure heater 8 is put into operation, a pressure reducing valve 12 is needed to be matched and adjusted, so that the flow and the temperature of the reheater are ensured to be within a specified range, and therefore, a cold return pipeline 10 behind a primary bypass 5 and a high-row check valve 13 is warmed, after the second high-pressure heater 8 is put into operation, the water supply temperature is effectively improved, a heater emergency water discharge valve is timely closed after an admission electric door is fully opened, and a primary drainage system and a secondary drainage system are opened, so that the heat preservation and the heating effects of drainage on the heater are realized.
The outlet end of the high cylinder 3 is connected with the secondary bypass 6 through a first pipeline 15, and the outlet end of the middle and low cylinder 4 is connected with the first pipeline 15 through an outlet pipe. A second pipeline 16 is connected between the high cylinder 3 and the middle low cylinder 4, and the high-temperature reheater pipeline 1 is connected into the middle low cylinder 4 through the second pipeline 16. The discharge end of the condenser 14 is connected with a third pipeline 17, and the output end of the third pipeline 17 is connected with a high-pressure adding group. Before the turbine is turned, in the process of speed increasing and grid connection with primary load, the primary bypass 5 and the second high-pressure heater 8 are used for heating the rear section of the cold re-pipeline 10, so that the water supply temperature is greatly improved, the steam consumption of the deaerator is reduced, the water supply temperature can be effectively improved especially under the condition of insufficient auxiliary steam pressure and flow in winter environment, the follow-up main reheat steam can be conveniently maintained to run under constant turning pressure, the main reheat steam passes through the high-temperature reheater pipeline 1, the secondary bypass 6 is connected to the condenser 14 after the use to recover working media, and the thermal shock to the condenser 14 is reduced.
The discharge end of the high-pressure unit is connected with a fourth pipeline 18, and the fourth pipeline 18 is used for being connected with a boiler. Recycling the exhaust steam after heating.
One side of the primary bypass 5 is connected with a water supply pipeline 19, the water supply pipeline 19 is connected with a water supply pump and used for supplying water, the water supply temperature is increased by matching with the pipeline design, the combustion adjustment of a boiler is facilitated, the follow-up main reheat steam is conveniently maintained to run under constant flushing pressure, one side of the secondary bypass 6 is connected with a condensate pipeline 20, and the condensate pipeline 20 is connected with condensate. Is used for reutilizing the condensed water.
The condenser 14 is connected with a recovery pipeline 21, and the recovery pipeline 21 is used for accessing a heat-reducing heat recovery medium. And the exhaust steam of the high cylinder 3 and the middle cylinder 4 is condensed into water by accessing a heat-reducing heat recovery medium, so that heat recovery is performed.
Example two
According to the embodiment shown in fig. 1, a heating pipe structure of a generator set heater is provided, the heating pipe structure comprises a high-temperature superheater pipeline 1, a high-temperature superheater pipeline 2, a high cylinder 3, a middle-low cylinder 4, a primary bypass 5, a secondary bypass 6 and a high-pressure adding group, wherein the output end of the high-temperature superheater pipeline 2 is connected with the high cylinder 3, the high-temperature superheater pipeline 1 is connected with the middle-low cylinder 4 through the high cylinder 3, the high-pressure adding group comprises a third high-pressure heater 7, a second high-pressure heater 8 and a first high-pressure heater 9 which are connected with each other, the discharge end of the high cylinder 3 is connected with a cold re-pipeline 10, and the cold re-pipeline 10 is connected with a boiler cold re-;
the high-pressure boiler is characterized in that a pressure reducing pipeline 11 is connected between the second high-pressure heater 8 and the cold re-pipeline 10, a pressure reducing valve 12 is arranged on the pressure reducing pipeline 11, the primary bypass 5 is connected between the high-temperature superheater pipeline 2 and the cold re-pipeline 10, a high-discharge check valve 13 is arranged at the upper section of the cold re-pipeline 10, the outlet ends of the high cylinder 3 and the middle low cylinder 4 are connected into the secondary bypass 6, the secondary bypass 6 is connected with a condenser 14, the discharge end of the condenser 14 is connected with a high-pressure adding group, and the discharge end of the high-pressure adding group is connected with a boiler. When the boiler is used, the primary bypass 5 and the secondary bypass 6 adopt a structure type of reducing pressure and then reducing temperature, and the high cylinder 3 and the middle and low cylinder 4 are combined to start the initial stage of boiler ignition, and the boiler can be put into after boosting. The general design capacity is 40% BMCR, and the starting of the machine set under the working conditions of cold state, warm state, hot state and extreme heat state can be completely met; when the heating pipe is bypassed, the second high-pressure heater 8 can be synchronously input with the first-stage bypass 5. Before the second high-pressure heater 8 is put into operation, the opening condition of the steam inlet electric door and the steam inlet check door of the second high-pressure heater 8 is forced, and the opening control is carried out in the DCS. After the second high-pressure heater 8 is put into operation, a pressure reducing valve 12 is needed to be matched and adjusted, so that the flow and the temperature of the reheater are ensured to be within a specified range, and therefore, a cold return pipeline 10 behind a primary bypass 5 and a high-row check valve 13 is warmed, after the second high-pressure heater 8 is put into operation, the water supply temperature is effectively improved, a heater emergency water discharge valve is timely closed after an admission electric door is fully opened, and a primary drainage system and a secondary drainage system are opened, so that the heat preservation and the heating effects of drainage on the heater are realized.
One side of the primary bypass 5 is connected with a water supply pipeline 19, the water supply pipeline 19 is connected with a water supply pump and used for supplying water, the water supply temperature is increased by matching with the pipeline design, the combustion adjustment of a boiler is facilitated, the follow-up main reheat steam is conveniently maintained to run under constant flushing pressure, one side of the secondary bypass 6 is connected with a condensate pipeline 20, and the condensate pipeline 20 is connected with condensate. Is used for reutilizing the condensed water.
The output section of the high-temperature superheater pipeline 2 is connected with a branch pipeline 22, and the branch pipeline 22 is connected into the high cylinder 3. And steam is accessed in multiple ways, so that the standby and maintenance are convenient.
Analysis of 3 high-pressure feeds shows that the third high-pressure heater 7 and the first high-pressure heater 9 supply heating steam through a steam extraction port of the steam turbine, no steam exists before the steam turbine does not enter steam, the second high-pressure heater 8 supplies heating steam through high-cylinder steam exhaust, and the heating steam can be supplied as long as the primary bypass 5 is opened for steam flow in the initial stage of starting, so that the operation of putting the second high-pressure heater 8 into the steam side after the boiler is ignited is realized, and the water supply temperature is increased. By the above-mentioned, this heating coil structure of generating set heater just drops into second high-pressure heater 8 before steam turbine hanging floodgate dashes and changes, carries out the heating coil to the pipeline, improves follow-up feedwater temperature, is favorable to boiler burning adjustment, has greatly improved the unit starting condition, has very big benefit to extension height and life, and through dropping into second high-pressure heater 8 (be located behind high-row check door 13), introduces a large amount of heated kang steam, still can retrieve the drainage when heating feedwater, has improved the economic nature and the security of unit greatly. Meanwhile, the first-stage bypass 5 and the second high-pressure heater 8 are used for heating the rear section of the cold re-pipeline 10, so that the water supply temperature is greatly increased, the follow-up main re-heating steam is maintained to run under constant flushing pressure, the main re-heating steam passes through the high-temperature reheater pipeline 1, the second-stage bypass 6 is connected to the condenser 14 after use to recover working media, and the thermal shock to the condenser 14 is reduced.
The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (8)
1. The utility model provides a heating coil structure of generating set heater, includes high temperature reheater pipeline (1), high temperature superheater pipeline (2), high jar (3), well low jar (4), one-level bypass (5), second grade bypass (6) and high group that adds, its characterized in that: the output end of the high-temperature superheater pipeline (2) is connected with a high cylinder (3), the high-temperature reheater pipeline (1) is connected into a middle-low cylinder (4) through the high cylinder (3), the high-pressure adding group comprises a third high-pressure heater (7), a second high-pressure heater (8) and a first high-pressure heater (9) which are mutually connected, the discharge end of the high cylinder (3) is connected with a cold re-pipeline (10), and the cold re-pipeline (10) is connected to a boiler cold re-pipeline;
the utility model discloses a boiler, including high-pressure heater (8), cold pipeline (10) that is connected with between high-pressure heater (8) and cold pipeline (10), and be equipped with relief pressure valve (12) on relief pressure pipeline (11), one-level bypass (5) are connected between high-temperature superheater pipeline (2) and cold pipeline (10) again, cold pipeline (10) upper segment department of returning is equipped with high row check valve (13), the exit of high jar (3) and well low jar (4) all inserts second grade bypass (6), and second grade bypass (6) connect condenser (14), the discharge end of condenser (14) is connected highly and is added the group, and highly adds the discharge end of group and connect the boiler.
2. A heating coil structure for a generator set heater as set forth in claim 1, wherein: the outlet end of the high cylinder (3) is connected with the secondary bypass (6) through a first pipeline (15), and the outlet end of the middle and low cylinder (4) is connected with the first pipeline (15) through an outlet pipe.
3. A heating coil structure for a generator set heater as set forth in claim 2, wherein: a second pipeline (16) is connected between the high cylinder (3) and the middle and low cylinders (4), and the high-temperature reheater pipeline (1) is connected into the middle and low cylinders (4) through the second pipeline (16).
4. A heating coil structure for a generator set heater as set forth in claim 3, wherein: the exhaust end of the condenser (14) is connected with a third pipeline (17), and the output end of the third pipeline (17) is connected with a high-pressure adding group.
5. A heating coil structure for a generator set heater as set forth in claim 4, wherein: the discharge end of the high-pressure adding group is connected with a fourth pipeline (18), and the fourth pipeline (18) is used for being connected with a boiler.
6. A heating coil structure for a generator set heater as set forth in claim 1, wherein: one side of the primary bypass (5) is connected with a water supply pipeline (19), the water supply pipeline (19) is connected with a water supply pump, one side of the secondary bypass (6) is connected with a condensation water pipeline (20), and the condensation water pipeline (20) is connected with condensation water.
7. A heating coil structure for a generator set heater as set forth in claim 1, wherein: the condenser (14) is connected with a recovery pipeline (21), and the recovery pipeline (21) is used for being connected with a heat-reducing heat recovery medium.
8. A heating coil structure for a generator set heater as set forth in claim 1, wherein: the output section of the high-temperature superheater pipeline (2) is connected with a branch pipeline (22), and the branch pipeline (22) is connected into the high cylinder (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322302764.3U CN220750107U (en) | 2023-08-28 | 2023-08-28 | Heating pipe structure of generator set heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322302764.3U CN220750107U (en) | 2023-08-28 | 2023-08-28 | Heating pipe structure of generator set heater |
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| Publication Number | Publication Date |
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| CN220750107U true CN220750107U (en) | 2024-04-09 |
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| CN202322302764.3U Active CN220750107U (en) | 2023-08-28 | 2023-08-28 | Heating pipe structure of generator set heater |
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| CN (1) | CN220750107U (en) |
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2023
- 2023-08-28 CN CN202322302764.3U patent/CN220750107U/en active Active
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