CN215062380U - Central heating system with tail end provided with electric boiler coupled with molten salt heat storage device - Google Patents
Central heating system with tail end provided with electric boiler coupled with molten salt heat storage device Download PDFInfo
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- CN215062380U CN215062380U CN202120924079.2U CN202120924079U CN215062380U CN 215062380 U CN215062380 U CN 215062380U CN 202120924079 U CN202120924079 U CN 202120924079U CN 215062380 U CN215062380 U CN 215062380U
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Abstract
The utility model provides a central heating system with an electric boiler coupled with a fused salt heat storage device at the tail end, which comprises a thermal power plant heat supply head station and an electrode boiler, wherein a water supply outlet of the thermal power plant heat supply head station is connected with a water supply main pipeline, a plurality of water outlets are arranged on the water supply main pipeline, and each water outlet is connected with a heat exchange station; the water outlet of each heat exchange station is connected with a return water main pipeline, and the water outlet of the return water main pipeline is connected with a return water inlet of a heat supply primary station of the thermal power plant; the electrode boiler is arranged at the tail end of the heating system; the water supply outlet of the electrode boiler is connected with a main water supply pipeline; a backwater inlet of the electrode boiler is connected with a backwater main pipeline; the water supply main pipeline is also connected with a molten salt heat storage device, and a return water inlet of the molten salt heat storage device is connected with a return water main pipeline; a second valve is arranged on the main water supply pipeline; a third valve is arranged on the return water main pipeline; a communicating pipe is arranged between the water inlet of the second valve and the water outlet of the third valve, and a first valve is arranged on the communicating pipe; the utility model discloses can improve heating system end user's heat supply quality by a wide margin.
Description
Technical Field
The utility model belongs to the central heating field relates to a terminal central heating system who sets up electric boiler coupling fused salt heat accumulation device.
Background
In recent years, with the continuous advance of urbanization, central heating has been rapidly developed, but at the same time, many problems are faced. The heat supply area borne by the heat supply system is larger and larger, the heat supply radius is longer and longer, the heat supply quality of a user at the tail end of the heat supply system is difficult to guarantee, and the complaint rate of the heat supply user is high and the heat charge recovery rate is low; the reason is two, firstly, the heat supply pipe network is huge, the hydraulic working condition imbalance is serious, the end user lacks heat supply flow and necessary qualification pressure head, efficient water circulation can not be carried out, secondly, many heat supply enterprises are in existence pressure, do not select the heat supply quality of the end few partial heat users of guarantee and whole overfeeding, avoid heat supply energy consumption too high and promote the heat supply cost, make the heat supply end be in the short-supply state for a long time, more very, refuse the heat supply requirement that some heat users at the end of heat supply newly increase into the network.
Disclosure of Invention
An object of the utility model is to provide an end sets up electric boiler coupling fused salt heat accumulation device's central heating system, has solved the unable difficult problem of guarantee of current heating system end user heat supply quality.
In order to achieve the above purpose, the utility model discloses a technical scheme is:
the utility model provides a central heating system with an electric boiler coupled with a fused salt heat storage device at the tail end, which comprises a thermal power plant heat supply head station and an electrode boiler, wherein a water supply outlet of the thermal power plant heat supply head station is connected with a water supply main pipeline, a plurality of water outlets are arranged on the water supply main pipeline, and each water outlet is connected with a heat exchange station;
the water outlet of each heat exchange station is connected with a return water main pipeline, and the water outlet of the return water main pipeline is connected with a return water inlet of a heat supply primary station of the thermal power plant;
the electrode boiler is arranged at the tail end of the heating system, and a water supply outlet of the electrode boiler is connected with a main water supply pipeline; a backwater inlet of the electrode boiler is connected with a backwater main pipeline;
a second valve is arranged on the main water supply pipeline; a third valve is arranged on the return water main pipeline;
and a communicating pipe is arranged between the water inlet of the second valve and the water outlet of the third valve, and a first valve is arranged on the communicating pipe.
Preferably, the water supply outlet of the electrode boiler is connected with the main water supply pipeline through a sixth valve and a fifth valve in sequence.
Preferably, a backwater inlet of the electrode boiler is connected with a backwater main pipeline through a seventh valve and a fourth valve in sequence.
Preferably, the tail end of the water supply main pipeline is also connected with a molten salt heat storage device, and a return water inlet of the molten salt heat storage device is connected with a return water main pipeline.
Preferably, the molten salt heat storage device comprises a molten salt electric heater, a high-temperature molten salt tank, a low-temperature molten salt tank, a hot salt pump, a cold salt pump and a steam-water heat exchange unit, wherein an outlet of the molten salt electric heater is connected with an inlet of the high-temperature molten salt tank, an outlet of the high-temperature molten salt tank is connected with an inlet of the hot salt pump, and an outlet of the hot salt pump is connected with a high-temperature side inlet of the steam-water heat exchange unit; the outlet of the high-temperature side of the steam-water heat exchange unit is connected with a low-temperature molten salt tank, the outlet of the low-temperature molten salt tank is connected with the inlet of a cold salt pump, and the outlet of the cold salt pump is connected with the inlet of a molten salt electric heater;
a hot water side outlet of the steam-water heat exchange unit is connected with a main water supply pipeline through an eighth valve and a fifth valve in sequence;
a hot water side inlet of the steam-water heat exchange unit is connected with a return water main pipeline through a ninth valve and a fourth valve in sequence;
and the power supply input end of the molten salt electric heater is connected with the off-peak electricity output end.
Preferably, the eighth valve is arranged at the downstream of the water outlet of the second valve; the ninth valve is arranged at the upstream of the water inlet of the third valve.
Preferably, the steam-water heat exchange unit comprises a molten salt steam generator and a steam-water heat exchanger, wherein an outlet of the hot salt pump is connected with a high-temperature side inlet of the molten salt steam generator, and a high-temperature side outlet of the molten salt steam generator is connected with an inlet of the low-temperature molten salt tank; the low-temperature side inlet of the molten salt steam generator is connected with the steam side outlet of the steam-water heat exchanger, and the low-temperature side outlet of the molten salt steam generator is connected with the steam side inlet of the steam-water heat exchanger;
a hot water side outlet of the steam-water heat exchanger is connected with an inlet of the eighth valve; and a hot water side inlet of the steam-water heat exchanger is connected with an outlet of the ninth valve.
Preferably, the system comprises a thermal power plant heat supply initial station and an electrode boiler, wherein a water supply outlet of the thermal power plant heat supply initial station is connected with a main water supply pipeline, a plurality of water outlets are formed in the main water supply pipeline, and each water outlet is connected with a heat exchange station;
the water outlet of each heat exchange station is connected with a return water main pipeline, and the water outlet of the return water main pipeline is connected with a return water inlet of a heat supply primary station of the thermal power plant;
the water supply outlet of the electrode boiler is connected with the inlet of the main water supply pipeline; a backwater inlet of the electrode boiler is connected with a water outlet of a backwater main pipeline;
a second valve is arranged on the main water supply pipeline; a third valve is arranged on the return water main pipeline;
a communicating pipe is arranged between the water inlet of the second valve and the water outlet of the third valve, and a first valve is arranged on the communicating pipe;
the water supply outlet of the electrode boiler is connected with the main water supply pipeline through a sixth valve;
a backwater inlet of the electrode boiler is connected with a backwater main pipeline through a seventh valve;
the water supply main pipeline is further connected with a molten salt heat storage device, and a return water inlet of the molten salt heat storage device is connected with a return water main pipeline.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides a central heating system of end setting electric boiler coupling fused salt heat accumulation device sets up electric boiler and heat accumulation device at the heating system end, solves the not high difficult problem of heat supply quality of the end user of heating system, especially in the heat supply alpine region, under the condition that the heat supply network load requirement is higher and the heat source output is not enough, can ensure the good heat supply quality of end user; the electric boiler supplies heat, realizes clean zero emission, only utilizes low-cost off-peak electricity to generate hot water, utilizes fused salt to store heat and store energy, can release heat in a peak-to-flat electricity period, and has low heat supply cost; in addition, when the load is switched by the fault of the pipe network, the heat supply of peripheral heat users can be independently borne, and the safety and reliability of heat supply are greatly improved.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention;
the system comprises a first valve 1, a second valve 2, a third valve 3, a fourth valve 4, a fifth valve 5, a sixth valve 6, a seventh valve 7, an eighth valve 8, a ninth valve 9, a hot salt pump 10, a cold salt pump 11, a heat supply primary station 12 of a thermal power plant, an electrode boiler 13, a molten salt electric heater 14, a high-temperature molten salt tank 15, a low-temperature molten salt tank 16, a molten salt steam generator 17, a steam-water heat exchanger 18 and a heat exchange station 19.
Detailed Description
The utility model provides a central heating system of end setting electric boiler coupling fused salt heat accumulation device, it is right to combine the figure below the utility model discloses do further detailed description. The following description is merely exemplary in nature and is in no way intended to limit the scope of the invention or its application.
Referring to fig. 1, the utility model provides a pair of terminal central heating system who sets up electric boiler coupling fused salt heat accumulation device, including thermal power plant heat supply head station 12, electrode boiler 13, fused salt electric heater 14, high temperature fused salt jar 15, low temperature fused salt jar 16, fused salt steam generator 17, soda heat exchanger 18, hot salt pump 10, cold salt pump 11, first valve 1, second valve 2, third valve 3, fourth valve 4, fifth valve 5, sixth valve 6, seventh valve 7, eighth valve 8, ninth valve 9 and a plurality of heat transfer station 19.
And a water supply port of the heat supply first station 12 of the thermal power plant enters each heat exchange station 19 through a main water supply pipeline to be used as a high-temperature water heat source, and the high-temperature water heat source is collected to the heat supply first station 12 of the thermal power plant through a main water return pipeline after heat exchange and is heated for next circulation.
A second valve 2 is arranged on the side of the main water supply pipeline close to a terminal user; a third valve 3 is arranged at a corresponding position on the return main pipeline, a communicating pipe is arranged between the supply main pipeline and the return main pipeline, a first valve 1 is arranged on the communicating pipe, the first valve 1 is closed in the early and late cold period of heat supply, the second valve 2 and the third valve 3 are opened, and the heat load behind the outlet of the second valve 2 is borne by a thermoelectric unit; in the heat supply severe cold period, the first valve 1 is opened, the second valve 2 and the third valve 3 are closed at the same time, and the heat load behind the outlet of the second valve 2 is borne by the electrode boiler and the molten salt heat storage device.
And a water supply outlet of the electrode boiler 13 is connected with an inlet of the sixth valve 6, an outlet of the sixth valve 6 is connected with an inlet of the fifth valve 5, and an outlet of the fifth valve 5 is connected with a main water supply pipeline.
A backwater inlet of the electrode boiler 13 is connected with an outlet of the seventh valve 7, and an inlet of the seventh valve 7 is connected with an outlet of the fourth valve 4; the inlet of the fourth valve 4 is connected with a return water main pipeline.
The outlet of the molten salt electric heater 14 is connected with the inlet of the high-temperature molten salt tank 15, the outlet of the high-temperature molten salt tank 15 is connected with the inlet of the hot salt pump 10, the outlet of the hot salt pump 10 is connected with the high-temperature side inlet of the molten salt steam generator 17, the high-temperature side outlet of the molten salt steam generator 17 is connected with the inlet of the low-temperature molten salt tank 16, the outlet of the low-temperature molten salt tank 16 is connected with the inlet of the cold salt pump 11, and the outlet of the cold salt pump 11 is connected with the inlet of the molten salt electric heater 14.
A low-temperature side inlet of the molten salt steam generator 17 is connected with a steam side outlet of the steam-water heat exchanger 18, and a low-temperature side outlet of the molten salt steam generator 17 is connected with a steam side inlet of the steam-water heat exchanger 18;
and a hot water side outlet of the steam-water heat exchanger 18 is connected with an inlet of the eighth valve 8, an outlet of the eighth valve 8 is connected with an inlet of the fifth valve 5, a hot water side inlet of the steam-water heat exchanger 18 is connected with an outlet of the ninth valve 9, and an inlet of the ninth valve 9 is connected with an outlet of the fourth valve 4.
The utility model has different operation modes according to different heat supply periods;
in the early and late cold periods, the first valve 1, the fourth valve 4, the fifth valve 5, the sixth valve 6, the seventh valve 7, the eighth valve 8 and the ninth valve 9 are all in a closed state, the second valve 2 and the third valve 3 are opened, the electrode boiler 13 and the molten salt heat storage device are not put into operation, and the heat supply primary station of the thermal power plant bears all heat loads;
in the severe cold period or when the pipe network is in failure and needs to cut off the heat load after the outlet of the second valve 2, the first valve 1 is opened, the second valve 2 and the third valve 3 are closed at the same time, the heat load in front of the inlet of the second valve 2 is borne by a heat supply first station of a thermal power plant, and the heat load behind the outlet of the second valve 2 is borne by an electrode boiler and a molten salt heat storage device;
in this period, the heating system of the utility model has two operation working conditions;
in a first working condition, the electrode boiler 13 is started to operate at a low-ebb electricity time period, the fourth valve 4, the fifth valve 5, the sixth valve 6 and the seventh valve 7 are opened, high-temperature water at an outlet of the electrode boiler 13 enters a water supply main pipe behind an outlet of the second valve 2 and enters a heat exchange station 19 behind the outlet of the second valve 2 along the pipeline for heat exchange, return water of the heat exchange station 19 returns to the electrode boiler 13 through a return water main pipe before an inlet of the third valve 3, and heating is performed for the next cycle; meanwhile, the molten salt in the molten salt electric heater is heated by utilizing the valley electricity to store energy, and the high-temperature molten salt carrying large amount of heat energy is stored in the high-temperature molten salt tank, namely the molten salt heat storage device is in an energy storage mode;
the second working condition is adopted in the peak-to-peak electricity period, the electrode boiler 13 is shut down, the sixth valve 6 and the seventh valve 7 are closed, the eighth valve 8 and the ninth valve 9 are opened, the molten salt heat storage device enters a heat release mode, the high-temperature molten salt is conveyed to the molten salt steam generator by the high-temperature hot salt pump, heat is transferred to circulating hot water by the high-temperature molten salt, steam is generated and sent to the steam-water heat exchanger, circulating water returned by the heating heat exchange station is supplied outwards, the molten salt after heat exchange flows back to the low-temperature molten salt tank, and is conveyed to the molten salt electric heater by the low-temperature cold salt pump to store heat in the next low-valley electricity period, and a heat cycle is completed.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A central heating system with an electric boiler coupled with a molten salt heat storage device at the tail end is characterized by comprising a thermal power plant heat supply first station (12) and an electrode boiler (13), wherein a water supply outlet of the thermal power plant heat supply first station (12) is connected with a water supply main pipeline, a plurality of water outlets are formed in the water supply main pipeline, and each water outlet is connected with a heat exchange station (19);
the water outlet of each heat exchange station (19) is connected with a return water main pipeline, and the water outlet of the return water main pipeline is connected with the return water inlet of the heat supply primary station (12) of the thermal power plant;
the water supply outlet of the electrode boiler (13) is connected with a main water supply pipeline; a backwater inlet of the electrode boiler (13) is connected with a backwater main pipeline;
a second valve (2) is arranged on the main water supply pipeline; a third valve (3) is arranged on the return water main pipeline;
a communicating pipe is arranged between the water inlet of the second valve (2) and the water outlet of the third valve (3), and a first valve (1) is arranged on the communicating pipe.
2. A central heating system with a tail end provided with an electric boiler coupled with a molten salt heat storage device according to claim 1, characterized in that a water supply outlet of the electrode boiler (13) is connected with a water supply main pipeline sequentially through a sixth valve (6) and a fifth valve (5).
3. A central heating system with an end provided with an electric boiler coupled with a molten salt heat storage device according to claim 1, characterized in that a return water inlet of the electrode boiler (13) is connected with a return water main pipeline through a seventh valve (7) and a fourth valve (4) in sequence.
4. The central heating system with the tail end provided with the electric boiler coupled with the molten salt heat storage device as claimed in claim 1, wherein the main water supply pipeline is further connected with the molten salt heat storage device, and a return water inlet of the molten salt heat storage device is connected with a return water main pipeline.
5. The central heating system with the tail end provided with the electric boiler coupled with the molten salt heat storage device is characterized in that the molten salt heat storage device comprises a molten salt electric heater (14), a high-temperature molten salt tank (15), a low-temperature molten salt tank (16), a hot salt pump (10), a cold salt pump (11) and a steam-water heat exchange unit, wherein an outlet of the molten salt electric heater (14) is connected with an inlet of the high-temperature molten salt tank (15), an outlet of the high-temperature molten salt tank (15) is connected with an inlet of the hot salt pump (10), and an outlet of the hot salt pump (10) is connected with a high-temperature side inlet of the steam-water heat exchange unit; an outlet at the high-temperature side of the steam-water heat exchange unit is connected with a low-temperature molten salt tank (16), an outlet of the low-temperature molten salt tank (16) is connected with an inlet of a cold salt pump (11), and an outlet of the cold salt pump (11) is connected with an inlet of a molten salt electric heater (14);
the hot water side outlet of the steam-water heat exchange unit is connected with a main water supply pipeline through an eighth valve (8) and a fifth valve (5) in sequence;
a hot water side inlet of the steam-water heat exchange unit is connected with a return water main pipeline through a ninth valve (9) and a fourth valve (4) in sequence;
and the power supply input end of the molten salt electric heater (14) is connected with the off-peak power output end.
6. A central heating system with a tail-end electric boiler coupled with a molten salt heat storage device according to claim 5, characterized in that the eighth valve (8) is arranged at the downstream of the water outlet of the second valve (2); the ninth valve (9) is arranged at the upstream of the water inlet of the third valve (3).
7. A central heating system with a tail end provided with an electric boiler coupled with a molten salt heat storage device according to claim 5, characterized in that the steam-water heat exchange unit comprises a molten salt steam generator (17) and a steam-water heat exchanger (18), wherein an outlet of the hot salt pump (10) is connected with a high-temperature side inlet of the molten salt steam generator (17), and a high-temperature side outlet of the molten salt steam generator (17) is connected with an inlet of the low-temperature molten salt tank (16); a low-temperature side inlet of the molten salt steam generator (17) is connected with a steam side outlet of the steam-water heat exchanger (18), and a low-temperature side outlet of the molten salt steam generator (17) is connected with a steam side inlet of the steam-water heat exchanger (18);
a hot water side outlet of the steam-water heat exchanger (18) is connected with an inlet of an eighth valve (8); and a hot water side inlet of the steam-water heat exchanger (18) is connected with an outlet of the ninth valve (9).
8. The central heating system with the tail end provided with the electric boiler coupled with the molten salt heat storage device is characterized by comprising a thermal power plant heat supply head station (12) and an electrode boiler (13), wherein a water supply outlet of the thermal power plant heat supply head station (12) is connected with a main water supply pipeline, a plurality of water outlets are formed in the main water supply pipeline, and each water outlet is connected with a heat exchange station (19);
the water outlet of each heat exchange station (19) is connected with a return water main pipeline, and the water outlet of the return water main pipeline is connected with the return water inlet of the heat supply primary station (12) of the thermal power plant;
the water supply outlet of the electrode boiler (13) is connected with the inlet of the main water supply pipeline; a backwater inlet of the electrode boiler (13) is connected with a water outlet of a backwater main pipeline;
a second valve (2) is arranged on the main water supply pipeline; a third valve (3) is arranged on the return water main pipeline;
a communicating pipe is arranged between the water inlet of the second valve (2) and the water outlet of the third valve (3), and a first valve (1) is arranged on the communicating pipe;
a water supply outlet of the electrode boiler (13) is connected with a main water supply pipeline through a sixth valve (6);
a backwater inlet of the electrode boiler (13) is connected with a backwater main pipeline through a seventh valve (7);
the tail end of the water supply main pipeline is also connected with a molten salt heat storage device, and a return water inlet of the molten salt heat storage device is connected with a return water main pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120924079.2U CN215062380U (en) | 2021-04-29 | 2021-04-29 | Central heating system with tail end provided with electric boiler coupled with molten salt heat storage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120924079.2U CN215062380U (en) | 2021-04-29 | 2021-04-29 | Central heating system with tail end provided with electric boiler coupled with molten salt heat storage device |
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| Publication Number | Publication Date |
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| CN215062380U true CN215062380U (en) | 2021-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120924079.2U Active CN215062380U (en) | 2021-04-29 | 2021-04-29 | Central heating system with tail end provided with electric boiler coupled with molten salt heat storage device |
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| Country | Link |
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| CN (1) | CN215062380U (en) |
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2021
- 2021-04-29 CN CN202120924079.2U patent/CN215062380U/en active Active
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