阅读说明：本技术 一种槽塔结合蒸汽发生系统 (Groove tower combines steam generation system ) 是由 张明宝 李琪 贾培英 张义堃 徐翔 韩健 刘学 苏雪刚 于 2019-09-12 设计创作，主要内容包括：一种槽塔结合蒸汽发生系统,本发明涉及一种蒸汽发生系统,本发明是为了提高槽式光热电站的光电转化效率,进而提供一种槽塔结合蒸汽发生系统。一种槽塔结合蒸汽发生系统包括储能系统、槽式导热油蒸汽发生系统、塔式熔盐蒸汽发生系统和给水系统,所述储能系统与塔式熔盐蒸汽发生系统连接,所述塔式熔盐蒸汽发生系统和槽式导热油蒸汽发生系统均与给水系统连接,所述塔式熔盐蒸汽发生系统与槽式导热油蒸汽发生系统连接。属于太阳能光热技术领域。本发明将两种光热发电形式结合,使槽式导热油光热系统的蒸汽进入塔式熔盐蒸汽发生系统进一步升温,提高槽塔结合后综合光热电站的光电转化效率。(The invention relates to a steam generation system, in particular to a groove-tower combined steam generation system, aiming at improving the photoelectric conversion efficiency of a groove type photo-thermal power station and further providing the groove-tower combined steam generation system. The utility model provides a groove tower combines steam generation system includes energy storage system, slot type conduction oil steam generation system, tower fused salt steam generation system and water supply system, energy storage system and tower fused salt steam generation system are connected, tower fused salt steam generation system and slot type conduction oil steam generation system all are connected with water supply system, tower fused salt steam generation system and slot type conduction oil steam generation system are connected. Belongs to the technical field of solar photo-thermal. The invention combines two photo-thermal power generation forms, so that the steam of the groove type heat conduction oil photo-thermal system enters the tower type molten salt steam generation system for further heating, and the photoelectric conversion efficiency of the comprehensive photo-thermal power station after the groove and the tower are combined is improved.)

1. A tank tower integrated steam generation system, characterized by: the groove-tower combined steam generation system comprises an energy storage system, a groove type heat conduction oil steam generation system, a tower type molten salt steam generation system and a water supply system, wherein the energy storage system is connected with the tower type molten salt steam generation system, the tower type molten salt steam generation system and the groove type heat conduction oil steam generation system are both connected with the water supply system, and the tower type molten salt steam generation system is connected with the groove type heat conduction oil steam generation system.

2. The cell tower integrated steam generation system of claim 1, wherein: the tower type molten salt steam generation system comprises a molten salt preheater (10), a molten salt evaporator (11), a molten salt superheater (13) and a molten salt reheater (14),

the molten salt superheater (13) and the molten salt reheater (14) are both connected with the molten salt evaporator (11), and the molten salt evaporator (11) is connected with the molten salt preheater (10); the molten salt preheater (10), the molten salt evaporator (11), the molten salt superheater (13) and the molten salt reheater (14) are all connected with the energy storage system.

3. the cell tower integrated steam generation system according to claim 1 or 2, wherein: the energy storage system comprises a high-temperature salt tank (1), a medium-temperature salt tank (2) and a low-temperature salt tank (3),

The high-temperature salt tank (1) is respectively connected with a molten salt reheater (14) and a molten salt superheater (13), and the medium-temperature salt tank (2) is connected with the molten salt superheater (13); the low-temperature salt tank (3) is connected with a molten salt preheater (10).

4. The cell tower integrated steam generation system of claim 3, wherein: a first regulating valve (16) is arranged on a molten salt inlet connecting pipeline of the high-temperature salt tank (1) and the molten salt reheater (14), and a second regulating valve (15) is arranged on a molten salt inlet connecting pipeline of the high-temperature salt tank (1) and the molten salt superheater (13); a first valve (18) is arranged on a fused salt outlet connecting pipeline of the medium temperature salt tank (2) and the fused salt superheater (13); and a second valve (17) is arranged on a fused salt side connecting pipeline of the fused salt superheater (13) and the fused salt evaporator (11).

5. The cell tower integrated steam generation system according to claim 1 or 2, wherein: the groove type heat-conducting oil steam generating system comprises a heat-conducting oil preheater (4) and a heat-conducting oil evaporator (5),

an oil inlet of the heat conduction oil evaporator (5) is connected with high-temperature heat conduction oil (5-1), an oil outlet of the heat conduction oil evaporator (5) is connected with an oil inlet of the heat conduction oil preheater (4), low-temperature heat conduction oil (5-2) flows out of an oil outlet of the heat conduction oil preheater (4), and the heat conduction oil evaporator (5) is connected with the molten salt superheater (13).

6. the cell tower integrated steam generation system of claim 1, wherein: the water supply system is respectively connected with water supply inlets of the molten salt preheater (10) and the heat conduction oil preheater (4), a water supply outlet of the heat conduction oil preheater (4) is respectively connected with water supply inlets of the heat conduction oil evaporator (5) and the molten salt preheater (10), and a steam outlet of the heat conduction oil evaporator (5) is connected with a steam inlet of the molten salt superheater (13); the water supply outlet of the molten salt preheater (10) is connected with the water supply inlet of the molten salt evaporator (11), the steam outlet of the molten salt evaporator (11) is connected with the steam inlet of the molten salt superheater (13), and the high-temperature superheated steam (19) flows out from the steam outlet of the molten salt superheater (13).

7. The cell tower integrated steam generation system of claim 6, wherein: a first water supply regulating valve (6) is arranged on a water supply inlet connecting pipeline of the water supply system and the heat conduction oil preheater (4); a second water supply regulating valve (9) is arranged on a water supply connecting pipeline of the water supply system and the molten salt preheater (10); a third adjusting valve (7) is arranged on a pipeline connecting a water supply outlet of the heat conduction oil preheater (4) and a water supply inlet of the molten salt preheater (10); a third valve (12) is arranged on a connecting pipeline of a steam outlet of the molten salt evaporator (11) and a steam inlet of the molten salt superheater (13); a fourth valve (8) is arranged on a connecting pipeline of a steam outlet of the heat-conducting oil evaporator (5) and an evaporator inlet of the molten salt superheater (13).

Technical Field

The invention relates to a steam generation system, in particular to a groove tower combined steam generation system, and belongs to the technical field of solar photo-thermal.

Background

The trough type heat-conducting oil solar thermal power generation system has a compact structure, the solar thermal radiation collecting device occupies a smaller area than a tower type system, the maturity of the heat collecting system is high, but the working temperature of a medium of the system is limited, so that the temperature of steam is generally not higher than 400 ℃, and the temperature of the steam directly influences the efficiency of a steam turbine and influences the photoelectric conversion efficiency. And the fused salt tower type photo-thermal power station has high heat collection efficiency, high working medium temperature, steam temperature of more than 550 ℃ and high photoelectric conversion efficiency. Therefore, if two photo-thermal power generation forms can be combined through a reasonable scheme, steam of the groove type heat conduction oil photo-thermal system enters the tower type molten salt steam generation system to further raise the temperature, and the photoelectric conversion efficiency of the groove type photo-thermal power station can be further improved.

Disclosure of Invention

In order to achieve the purpose, the invention improves the photoelectric conversion efficiency of the groove type photo-thermal power station, and further provides a groove tower combined steam generation system.

technical scheme

The groove-tower combined steam generation system comprises an energy storage system, a groove type heat conduction oil steam generation system, a tower type molten salt steam generation system and a water supply system, wherein the energy storage system is connected with the tower type molten salt steam generation system, the tower type molten salt steam generation system and the groove type heat conduction oil steam generation system are both connected with the water supply system, and the tower type molten salt steam generation system is connected with the groove type heat conduction oil steam generation system.

further, the tower type molten salt steam generation system comprises a molten salt preheater, a molten salt evaporator, a molten salt superheater and a molten salt reheater, wherein the molten salt superheater and the molten rock reheater are both connected with the molten rock evaporator, and the molten rock evaporator is connected with the molten rock preheater; the lava preheater, the molten salt evaporator, the molten salt superheater and the molten salt reheater are all connected with the energy storage system.

Further, the energy storage system comprises a high-temperature salt tank, a medium-temperature salt tank and a low-temperature salt tank, wherein the high-temperature salt tank is respectively connected with a molten salt inlet of a molten salt reheater and a molten salt inlet of the molten salt superheater, and the medium-temperature salt tank is connected with a molten salt superheater and a molten salt outlet collecting pipeline of the molten salt reheater; the low-temperature salt tank is connected with a fused salt outlet of the fused salt preheater.

Furthermore, a first regulating valve is arranged on a fused salt inlet connecting pipeline of the high-temperature salt tank and the fused salt reheater, and a second regulating valve is arranged on a fused salt inlet connecting pipeline of the high-temperature salt tank and the fused salt superheater; a first valve is arranged on a connecting pipeline of the medium-temperature salt tank and a fused salt outlet collecting pipeline of the fused salt superheater and the fused salt reheater; and a second valve is arranged on the fused salt inlet pipeline of the fused salt evaporator.

Furthermore, the groove type heat conduction oil steam generation system comprises a heat conduction oil preheater and a heat conduction oil evaporator, an oil inlet of the heat conduction oil evaporator is connected with high-temperature heat conduction oil, an oil outlet of the heat conduction oil evaporator is connected with an oil inlet of the heat conduction oil preheater, low-temperature heat conduction oil flows out from an oil outlet of the heat conduction oil preheater, and the heat conduction oil evaporator is connected with the molten salt superheater.

Furthermore, the water supply system is respectively connected with the water supply inlets of the molten salt preheater and the heat conduction oil preheater, the water supply outlet of the heat conduction oil preheater is respectively connected with the water supply inlets of the heat conduction oil evaporator and the molten salt preheater, and the water supply outlet of the heat conduction oil evaporator is connected with the steam inlet of the molten salt superheater; the water supply outlet of the molten salt preheater is connected with the water supply inlet of the molten salt evaporator, the steam outlet of the molten salt evaporator is connected with the steam inlet of the molten salt superheater, and high-temperature superheated steam flows out from the steam outlet of the molten salt superheater.

Furthermore, a first water supply regulating valve is arranged on a connecting pipeline of the water supply system and the heat conduction oil preheater; a second water supply regulating valve is arranged on a water supply inlet connecting pipeline of the water supply system and the molten salt preheater; and a third regulating valve is arranged on a water supply outlet of the heat conduction oil preheater and a water supply inlet connecting pipeline of the molten salt preheater, a third valve is arranged on a steam outlet of the molten salt evaporator and a steam inlet connecting pipeline of the molten salt superheater, and a fourth valve is arranged on a steam outlet of the heat conduction oil evaporator and a steam inlet connecting pipeline of the molten salt superheater.

Compared with the prior art, the invention has the following beneficial effects:

The invention combines two photo-thermal power generation forms, so that steam of the groove type heat conduction oil photo-thermal system enters the tower type molten salt steam generation system for further heating, and the photoelectric conversion efficiency of the groove type photo-thermal power station is improved;

According to the invention, a water supply system is shared, the water supply system respectively enters a tower type molten salt steam generation system and a groove type heat conduction oil steam generation system, a heat conduction oil superheater and a heat conduction oil reheater in the groove type heat conduction oil steam generation system are cancelled, heat conduction oil directly enters a heat conduction oil evaporator to generate saturated steam, the saturated steam is mixed with the saturated steam generated by a molten salt evaporator in the molten salt steam generation system and then enters the molten salt superheater to be heated, the generated superheated steam directly goes to a steam turbine to do work, the cold reheated steam after doing work enters the molten salt reheater to be reheated, and the reheated steam after being heated goes to a low pressure cylinder of the steam turbine to do;

When the groove type heat conduction oil condensation system or the tower type molten salt condensation system breaks down, the heat conduction oil evaporator side or the molten salt evaporator side can be cut off, so that the system can continuously maintain low-load operation, the use efficiency of the generator set is improved, and the risk of failure shutdown is reduced;

Usually, a molten salt steam generation system needs to be provided with an external circulating pump and a starting electric heater, and is used for realizing cold start of the system and ensuring that the system does not have molten salt solidification and freezing blockage accidents. The system can preheat and heat the water supply of the fused salt evaporator system side through the trough type evaporator system side, so that the system is started and the water temperature is guaranteed, the complexity of the fused salt steam generation system can be simplified, and the investment cost and the plant power rate are reduced;

the fused salt superheater is utilized to improve the steam parameters of the heat conducting oil evaporator system, indirectly improve the efficiency of the matched steam turbine system, and further improve the photoelectric conversion efficiency.

drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a thermal equilibrium diagram for a 250WM drum in combination with a steam generation system.

FIG. 1-high temperature salt tank; 2-medium temperature salt tank; 3-low temperature salt tank; 4-a heat conducting oil preheater; 4-1, low-temperature heat conduction oil; 5-a heat conducting oil evaporator; 5-1, high-temperature heat conduction oil; 6-a first water supply regulating valve; 7-a third regulating valve; 8-a fourth valve; 9-a second water supply regulating valve; 10-molten salt preheater; 11-a molten salt evaporator; 12-a third valve; 13-molten salt superheater; 14-a molten salt reheater; 14-1 cold reheat steam; 14-2, reheating steam at high temperature; 15-a second trim valve; 16-a first trim valve; 17-a second valve; 18-a first valve; 19-high temperature superheated steam; 20-a water supply system.

Detailed Description