CN214741514U - Double-pumping industrial steam supply system based on heat storage tank - Google Patents
Double-pumping industrial steam supply system based on heat storage tank Download PDFInfo
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- CN214741514U CN214741514U CN202121154405.2U CN202121154405U CN214741514U CN 214741514 U CN214741514 U CN 214741514U CN 202121154405 U CN202121154405 U CN 202121154405U CN 214741514 U CN214741514 U CN 214741514U
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Abstract
The utility model provides a two industry steam supply systems of taking out based on heat storage tank, including boiler, steam turbine high pressure cylinder, steam turbine intermediate pressure cylinder, steam turbine low pressure cylinder and backheating unit, wherein, the steam outlet of boiler connects the steam inlet of steam turbine high pressure cylinder; a reheating steam outlet of the boiler is respectively connected with a steam turbine intermediate pressure cylinder, a heat regeneration unit and an intermediate pressure industrial steam pipeline; the steam outlet of the steam turbine intermediate pressure cylinder is respectively connected with the steam turbine low pressure cylinder, the heat regeneration unit and the low pressure industrial steam pipeline; the steam outlet of the low-pressure cylinder of the steam turbine is connected with the heat regeneration unit; the heat recovery unit is respectively connected with the medium-pressure industrial steam pipeline and the low-pressure industrial steam pipeline; the utility model discloses can assist coal-fired power generation system load of going up and down fast, improve the operation flexibility of unit.
Description
Technical Field
The utility model belongs to the wind power generation field, concretely relates to two industry steam supply systems of taking out based on heat storage tank.
Background
In recent years, the renewable energy industry in China is rapidly developed, and the scale increase speed of the wind turbine generator assembly is astonishing. However, in the three north areas of China, a large amount of wind is abandoned due to wind-heat conflict, and the resource waste and the economic loss are serious. The peak regulation capability is very limited mainly because the peak-adjustable power supplies such as water and electricity and a straight condensing unit are scarce, and the thermoelectric heating unit is restricted by the running characteristic of 'fixing electricity by heat' in the heat supply period in winter. Therefore, the realization of thermoelectric decoupling and the improvement of the flexibility of the cogeneration unit are problems to be solved urgently in the thermal power industry of China, particularly for the double-extraction heat supply unit.
Disclosure of Invention
An object of the utility model is to provide a two industry steam supply systems of taking out based on heat storage tank has solved the above-mentioned not enough that exists among the prior art.
In order to achieve the above purpose, the utility model discloses a technical scheme is:
the utility model provides a two industry steam supply systems of taking out based on heat storage tank, including boiler, steam turbine high pressure cylinder, steam turbine intermediate pressure cylinder, steam turbine low pressure cylinder and backheating unit, wherein, the steam outlet of boiler connects the steam inlet of steam turbine high pressure cylinder; a reheating steam outlet of the boiler is respectively connected with a steam turbine intermediate pressure cylinder, a heat regeneration unit and an intermediate pressure industrial steam pipeline; the steam outlet of the steam turbine intermediate pressure cylinder is respectively connected with the steam turbine low pressure cylinder, the heat regeneration unit and the low pressure industrial steam pipeline;
the steam outlet of the low-pressure cylinder of the steam turbine is connected with the heat regeneration unit;
the heat recovery unit is respectively connected with the medium-pressure industrial steam pipeline and the low-pressure industrial steam pipeline.
Preferably, the heat recovery unit comprises a first heater group, a second heater group, a low-temperature heat storage tank, a medium-temperature heat storage tank and a high-temperature heat storage tank, wherein a steam inlet of the first heater group is respectively connected with a reheated steam outlet of the boiler, a steam outlet of a steam turbine medium-pressure cylinder and a steam outlet of a steam turbine low-pressure cylinder; the heat storage medium inlet of the first heater group is connected with the outlet of the low-temperature heat storage tank; the heat storage medium outlet of the first heater group is sequentially connected with the heat storage medium inlets of the high-temperature heat storage tank, the second heater group and the low-temperature heat storage tank; a heat storage medium inlet of the medium-temperature heat storage tank is connected with a heat storage medium outlet of the first heater group; the heat storage medium outlet of the medium-temperature heat storage tank is connected with the heat storage medium inlet of the second heater group; and a steam outlet of the second heater group is respectively connected with the medium-pressure industrial steam pipeline and the low-pressure industrial steam pipeline.
Preferably, the first heater group comprises a first heater, a second heater, a third heater and a fourth heater, wherein steam inlets of the first heater and the second heater are connected with a steam outlet of a low-pressure cylinder of the steam turbine; the steam inlet of the third heater is connected with the steam outlet of the steam turbine intermediate pressure cylinder; the steam inlet of the fourth heater is connected with the reheat steam outlet of the boiler; the heat storage medium inlet of the first heater is connected with the heat storage medium outlet of the low-temperature heat storage tank; the heat storage medium outlet of the first heater is sequentially connected with the heat storage medium inlets of the second heater, the third heater, the fourth heater, the high-temperature heat storage tank, the second heater group and the temperature heat storage tank.
Preferably, the heat storage medium inlet of the medium-temperature heat storage tank is connected with the heat storage medium outlet of the third heater.
Preferably, the drainage outlets of the first heater and the second heater are connected with a low-pressure heater group, and the water outlet of the low-pressure heater group is connected with the inlet of the deaerator;
and the drain outlets of the third heater and the fourth heater are connected with the inlets of the deaerators.
Preferably, the second heater group comprises a fifth heater, a sixth heater, a seventh heater and an eighth heater, wherein a heat storage medium inlet of the fifth heater is connected with a heat storage medium outlet of the high-temperature heat storage tank, and a heat storage medium outlet of the fifth heater is sequentially connected with heat storage medium inlets of the sixth heater, the seventh heater, the eighth heater, the low-temperature heat storage tank, the first heater group and the high-temperature heat storage tank;
a water inlet of a heat supply network of the heater II is connected with a deaerator; the heat supply network water outlet of the eighth heater is sequentially connected with the seventh heater, the sixth heater and the fifth heater;
the steam outlet of the sixth heater is also connected with a medium-pressure industrial steam pipeline; and a steam outlet of the fifth heater is connected with a low-pressure industrial steam pipeline.
Preferably, the heat storage medium outlet of the medium-temperature heat storage tank is connected to a connecting pipeline between the fifth heater and the sixth heater.
Preferably, a heat supply network water inlet of the deaerator is connected with a drainage outlet of the first heater group; and the heat supply network water outlet of the deaerator is also connected to the water inlet of the boiler.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides a pair of take out industry steam supply system based on heat storage tank, adopt during the combination of a plurality of heater groups and a plurality of heat storage tanks is supplied to the outside, low pressure industry steam, satisfy different heat load demands, the multi-stage heater step heating heat-retaining medium of first heater group, the multi-stage heater step heating heat supply network water of second heater group, the waste heat of steam turbine exhaust has been utilized simultaneously, this kind stores the heat mode and has improved heat supply efficiency greatly, can assist the quick load that goes up and down of coal-fired power generation system, the operation flexibility of improvement unit.
Further, the utility model discloses can be through the flow of adjusting heat-retaining medium and heat supply network water, can satisfy different heat supply load demands.
Drawings
Fig. 1 is a schematic diagram of a system structure related to the present invention;
wherein, 1-a boiler, 2-a turbine high pressure cylinder, 3-a turbine medium pressure cylinder, 4-a turbine low pressure cylinder, 5-a condensate pump, 6-a low pressure heater group, 7-a deaerator, 8-a feed pump, 9-a high pressure heater group, 10-a low temperature heat storage tank, 11-a heater, 12-a second heater, 13-a third heater, 14-a fourth heater, 15-a high temperature heat storage tank, 16-a fifth heater, 17-a medium temperature heat storage tank, 18-a sixth heater, 19-a seventh heater, 20-an eighth heater, 21-a first valve, 22-a second valve, 23-a third valve, 24-a fourth valve, 25-a fifth valve, 26-a sixth valve and 27-a seventh valve, 28-eighth valve, 29-ninth valve, 30-tenth valve, 31-eleventh valve, 32-twelfth valve and 33-thirteenth valve.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, the utility model provides a double-pumping industrial steam supply system based on heat storage tank, which comprises a boiler 1, a steam turbine high pressure cylinder 2, a steam turbine intermediate pressure cylinder 3, a steam turbine low pressure cylinder 4, a condensate pump 5, a low pressure heater group 6, a deaerator 7, a water feed pump 8, a high pressure heater group 9, a low temperature heat storage tank 10, a first heater 11, a second heater 12, a third heater 13, a fourth heater 14, a high temperature heat storage tank 15, a fifth heater 16, a medium temperature heat storage tank 17, a sixth heater 18, a seventh heater 19, an eighth heater 20, a first valve 21, a second valve 22, a third valve 23, a fourth valve 24, a fifth valve 25, a sixth valve 26, a seventh valve 27, an eighth valve 28, a ninth valve 29, a tenth valve 30, an eleventh valve 31, a twelfth valve 32 and a thirteenth valve 33, wherein, a reheat steam outlet of the boiler 1 is divided into three paths, one path is connected with the inlet of the turbine intermediate pressure cylinder 3, and a second valve 22 is arranged on a connecting pipeline between the two paths; the second path is connected with the inlet of the fourth heater steam 14, and a first valve 21 is arranged on a connecting pipeline between the first path and the second path; the remaining one is connected to a first conduit X1 via a valve No. twelve 32.
The steam outlet of the steam turbine intermediate pressure cylinder 3 is divided into three paths, wherein one path is connected with the inlet of the steam turbine low pressure cylinder 4, and a fourth valve is arranged on a pipeline between the two paths; the second path is connected with the inlet of the third heater 13, and a third valve 23 is arranged on a connecting pipeline between the second path and the third heater; the remaining one is connected to a second pipe Y1 via a thirteen-valve 33.
The steam outlet of the steam turbine low pressure cylinder 4 is connected with the steam inlet of the first heater 11; and a middle steam extraction port of the steam turbine low-pressure cylinder 3 is connected with a steam inlet of the second heater 12.
The outlet of the low-temperature heat storage tank 10 is connected to the inlet of the high-temperature heat storage tank 15 through a first heater 11, a second heater 12, a third heater 13 and a fourth heater 14 in sequence.
And a fifth valve 25 is arranged on a connecting pipeline between the low-temperature heat storage tank 10 and the first heater 11.
And a ninth valve 29 is arranged on a connecting pipeline between the fourth heater 14 and the high-temperature heat storage tank 15.
An outlet of the high-temperature heat storage tank 15 is connected to an inlet of the low-temperature heat storage tank 10 through a fifth heater 16, a sixth heater 18, a seventh heater 19 and an eighth heater 20 in sequence.
A tenth valve 30 is arranged on a connecting pipeline between the high-temperature heat storage tank 15 and the fifth heater 16.
And a sixth valve 26 is arranged on a connecting pipeline between the low-temperature heat storage tank 10 and the eighth heater 20.
The outlet of the heat storage medium side of the third heater 13 is communicated with the inlet of the medium temperature heat storage tank 17, and a seventh valve 27 is arranged on a connecting pipeline between the two.
An outlet of the medium temperature heat storage tank 17 is communicated with a pipeline of a heat storage medium side inlet of the No. six heater 18, and a No. eight valve 28 is installed on a connecting pipeline between the medium temperature heat storage tank and the No. six heater.
And the drainage outlets of the first heater 11 and the second heater 12 are converged into a condenser hot well.
The drainage outlets of the third heater 13 and the fourth heater 14 are both merged into the deaerator 7.
The outlet of the deaerator 7 is divided into two paths, wherein one path is sequentially connected with an eighth heater 20, a seventh heater 19, a sixth heater 18 and a fifth heater 16; the other path is connected with the inlet of a high-pressure heater group 9 through a feed water pump 8, and the outlet of the high-pressure heater group 9 is connected with the water inlet of the boiler 1.
The water is added into a hot well of a condenser after being treated by water;
the utility model discloses a working process, wherein, the heat-retaining process: the heat storage medium flowing out of the low-temperature heat storage tank 10 sequentially passes through the first heater 11, the second heater 12, the third heater 13 and the fourth heater 14 to absorb heat, a part of the heat storage medium flows through the first heater 11, the second heater 12 and the third heater 13 to absorb heat and then enters the medium-temperature heat storage tank to be stored, and a part of the heat storage medium flows through the four heaters 14 and then enters the high-temperature heat storage tank 15 to be stored.
An exothermic process:
the heat storage medium flows out of the high-temperature heat storage tank 15, then releases heat through the fifth heater 16, then is converged with the heat storage medium flowing out of the medium-temperature heat storage tank 17, then sequentially enters the sixth heater 18, the seventh heater 19 and the eighth heater 20 to release heat, and finally returns to the low-temperature heat storage tank 10.
The heat supply network water from the outlet of the deaerator 7 sequentially flows through an eighth heater 20, a seventh heater 19, a sixth heater 18 and a fifth heater 16 to absorb heat, part of the heat supply network water flows through the eighth heater 20, the seventh heater 19 and the sixth heater 18 to supply low-pressure industrial steam to the outside, and part of the heat supply network water flows through the four heaters to supply medium-pressure industrial steam to the outside; an eleventh valve 31 is arranged on a pipeline of the water side outlet of the sixth heater 18 communicated with the water side inlet of the fifth heater 16.
The operation method comprises the following steps:
when the load of the unit is high, opening a No. twelve valve 32 on a first pipeline X1, supplying medium-pressure industrial steam by using reheated steam, opening a No. thirteen valve 33 on a second pipeline Y1, supplying low-pressure industrial steam by using steam exhausted by a steam turbine medium-pressure cylinder, and simultaneously opening a No. five valve, a No. seven valve and a No. nine valve, and storing heat in a medium-temperature heat storage tank and a high-temperature heat storage tank; when the load of the unit is low, the fifth valve, the seventh valve and the ninth valve are closed, the sixth valve, the eighth valve, the tenth valve and the eleventh valve are opened, and the heat released by the medium-temperature heat storage tank and the high-temperature heat storage tank respectively meets the medium-pressure industrial steam and the low-pressure industrial steam.
Claims (8)
1. A double-extraction industrial steam supply system based on a heat storage tank is characterized by comprising a boiler (1), a steam turbine high-pressure cylinder (2), a steam turbine medium-pressure cylinder (3), a steam turbine low-pressure cylinder (4) and a heat regeneration unit, wherein a steam outlet of the boiler (1) is connected with a steam inlet of the steam turbine high-pressure cylinder (2); a reheating steam outlet of the boiler (1) is respectively connected with a steam turbine intermediate pressure cylinder (3), a reheating unit and an intermediate pressure industrial steam pipeline; the steam outlet of the steam turbine intermediate pressure cylinder (3) is respectively connected with the steam turbine low pressure cylinder (4), the heat regeneration unit and the low pressure industrial steam pipeline;
the steam outlet of the steam turbine low pressure cylinder (4) is connected with the heat regeneration unit;
the heat recovery unit is respectively connected with the medium-pressure industrial steam pipeline and the low-pressure industrial steam pipeline.
2. The heat storage tank-based double-extraction industrial steam supply system is characterized in that the heat recovery unit comprises a first heater group, a second heater group, a low-temperature heat storage tank (10), an intermediate-temperature heat storage tank (17) and a high-temperature heat storage tank (15), wherein a steam inlet of the first heater group is respectively connected with a reheat steam outlet of a boiler (1), a steam outlet of a steam turbine intermediate-pressure cylinder (3) and a steam outlet of a steam turbine low-pressure cylinder (4); the heat storage medium inlet of the first heater group is connected with the outlet of the low-temperature heat storage tank (10); the heat storage medium outlet of the first heater group is sequentially connected with the heat storage medium inlets of the high-temperature heat storage tank (15), the second heater group and the low-temperature heat storage tank (10); a heat storage medium inlet of the medium-temperature heat storage tank (17) is connected with a heat storage medium outlet of the first heater group; a heat storage medium outlet of the medium-temperature heat storage tank (17) is connected with a heat storage medium inlet of the second heater group; and a steam outlet of the second heater group is respectively connected with the medium-pressure industrial steam pipeline and the low-pressure industrial steam pipeline.
3. The heat storage tank-based double-extraction industrial steam supply system is characterized in that the first heater group comprises a first heater (11), a second heater (12), a third heater (13) and a fourth heater (14), wherein steam inlets of the first heater (11) and the second heater (12) are connected with a steam outlet of a steam turbine low pressure cylinder (4); the steam inlet of the third heater (13) is connected with the steam outlet of the steam turbine intermediate pressure cylinder (3); the steam inlet of the fourth heater (14) is connected with the reheat steam outlet of the boiler (1); a heat storage medium inlet of the first heater (11) is connected with a heat storage medium outlet of the low-temperature heat storage tank (10); the heat storage medium outlet of the first heater (11) is sequentially connected with the heat storage medium inlets of the second heater (12), the third heater (13), the fourth heater (14), the high-temperature heat storage tank (15), the second heater group and the low-temperature heat storage tank (10).
4. A double-extraction industrial steam supply system based on a heat storage tank as claimed in claim 3, characterized in that the heat storage medium inlet of the medium-temperature heat storage tank (17) is connected with the heat storage medium outlet of the third heater (13).
5. The heat storage tank-based double-extraction industrial steam supply system is characterized in that the water drainage outlets of the first heater (11) and the second heater (12) are connected with a low-pressure heater group (6), and the water outlet of the low-pressure heater group (6) is connected with the inlet of a deaerator (7);
and the hydrophobic outlets of the third heater (13) and the fourth heater (14) are connected with the inlet of the deaerator (7).
6. The double-extraction industrial steam supply system based on the heat storage tank is characterized in that the second heater group comprises a fifth heater (16), a sixth heater (18), a seventh heater (19) and an eighth heater (20), wherein a heat storage medium inlet of the fifth heater (16) is connected with a heat storage medium outlet of the high-temperature heat storage tank (15), and a heat storage medium outlet of the fifth heater (16) is sequentially connected with heat storage medium inlets of the sixth heater (18), the seventh heater (19), the eighth heater (20), the low-temperature heat storage tank (10), the first heater group and the high-temperature heat storage tank (15);
a water inlet of a heat supply network of the eighth heater (20) is connected with a deaerator (7); a heat supply network water outlet of the eighth heater (20) is sequentially connected with a seventh heater (19), a sixth heater (18) and a fifth heater (16);
the steam outlet of the sixth heater (18) is also connected with a medium-pressure industrial steam pipeline; and a steam outlet of the fifth heater (16) is connected with a low-pressure industrial steam pipeline.
7. A double extraction industrial steam supply system based on a heat storage tank as claimed in claim 6, characterized in that the heat storage medium outlet of the medium temperature heat storage tank (17) is connected to the connecting pipe between the No. five heater (16) and the No. six heater (18).
8. The heat storage tank-based double-extraction industrial steam supply system is characterized in that a heat supply network water inlet of the deaerator (7) is connected with a water drainage outlet of the first heater group; and the heat supply network water outlet of the deaerator (7) is also connected to the water inlet of the boiler (1).
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| CN202121154405.2U CN214741514U (en) | 2021-05-26 | 2021-05-26 | Double-pumping industrial steam supply system based on heat storage tank |
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| CN202121154405.2U CN214741514U (en) | 2021-05-26 | 2021-05-26 | Double-pumping industrial steam supply system based on heat storage tank |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113187570A (en) * | 2021-05-26 | 2021-07-30 | 华能(广东)能源开发有限公司海门电厂 | Double-extraction industrial steam supply system and method based on heat storage tank |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113187570A (en) * | 2021-05-26 | 2021-07-30 | 华能(广东)能源开发有限公司海门电厂 | Double-extraction industrial steam supply system and method based on heat storage tank |
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