CN212869724U - Power station boiler high-temperature flue gas coupling reheat steam heat-storage deep peak regulation system - Google Patents
Power station boiler high-temperature flue gas coupling reheat steam heat-storage deep peak regulation system Download PDFInfo
- Publication number
- CN212869724U CN212869724U CN202021907718.6U CN202021907718U CN212869724U CN 212869724 U CN212869724 U CN 212869724U CN 202021907718 U CN202021907718 U CN 202021907718U CN 212869724 U CN212869724 U CN 212869724U
- Authority
- CN
- China
- Prior art keywords
- temperature
- molten salt
- heat
- low
- flue gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The utility model discloses a power plant boiler high temperature flue gas coupling reheat steam heat-retaining degree of depth peak regulation system, including boiler, low temperature molten salt jar, fused salt reheat steam heat exchanger, high temperature molten salt jar, heat supply network return water pipeline, heat supply network water supply pipe, low temperature reheat steam input pipeline, low temperature reheater entry collection case, steam turbine and generator, this system satisfies the nimble degree of depth peak regulation's of thermal power plant unit requirement, and has the characteristics that the system is simple, investment cost hangs down and degree of depth peak regulation potentiality is big.
Description
Technical Field
The utility model belongs to thermal power plant's degree of depth peak shaving field relates to a power plant boiler high temperature flue gas coupling reheat steam heat-retaining degree of depth peak shaving system.
Background
With the change of national power policy in recent years, the main functions of the thermal power plant are changed at the same time, and the main power of power supply is changed into the main power of power supply to participate in the deep peak regulation in cooperation with a power grid. Meanwhile, the policy of subsidizing the electricity price of the advanced peak regulation of the national platform greatly stimulates the enthusiasm of the thermal power plant for carrying out the advanced peak regulation reconstruction of the unit. At present, thermal power faces the risk of excess of productivity and structurality, and new energy faces great consumption pressure. The thermal power is bound to give way for new energy development. Thermal power generating units are subject to deep peaking. For the 'three north' area, the wind-fire contradiction of the heating period is particularly prominent, the period with the best wind power resource is the winter heating period, in addition, the proportion of the provincial thermoelectric units is too high, peak-shaving power sources of other categories are relatively deficient, the continuously increased heating demand and the continuously increased clean energy installation are caused, and the peak-shaving space is very limited. Particularly, in northeast regions, most thermal power is combined heat and power generation units, the peak regulation capacity is only 10%, new energy storage consumption and new energy increment development are influenced, and a hard gap of the peak regulation capacity causes severe electricity limitation of new energy in partial regions, so that the thermoelectric units can realize deep peak regulation only through transformation.
At present, a unit participating in deep peak shaving runs for a long time deviating from a design value, so that the safety and the economy of the unit are reduced. From the technology and the practice of transformation, the transformed unit has the safety problems of boiler low-load stable combustion and hydrodynamic circulation, the full-load investment of a denitration device and the low-load cooling of a steam turbine, the flexibility problem of a control system during long-term low load and quick load change, the problem of equipment operation cycle and service life attenuation, the problems of heat supply unit thermoelectric decoupling and the like to different degrees, and further attack, optimization and solution are needed. The system and the method for deeply regulating the peak of the heat storage of the high-temperature flue gas coupled with the reheat steam of the power station boiler have the advantages of simplicity, low investment, high potential of deep peak regulation and the like, and the deep peak regulation of the thermal power plant unit is realized.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a power plant boiler high temperature flue gas coupling reheat steam heat-retaining degree of depth peak shaving system, this system satisfies the nimble requirement of degree of depth peak shaving of thermal power plant unit, and has that the system is simple, investment cost low and degree of depth peak shaving potentiality is big characteristics.
In order to achieve the purpose, the power station boiler high-temperature flue gas coupling reheat steam heat storage depth peak regulation system comprises a boiler, a low-temperature molten salt tank, a molten salt reheat steam heat exchanger, a high-temperature molten salt tank, a heat supply network water return pipeline, a heat supply network water supply pipeline, a low-temperature reheat steam input pipeline, a low-temperature reheater inlet header, a steam turbine and a generator;
a wall type low-temperature reheater, a medium-temperature reheater, a high-temperature reheater, a fused salt high-temperature flue gas heat exchanger, a low-temperature superheater, an economizer and an air preheater are sequentially arranged in the boiler along the flow direction of flue gas;
the outlet of the low-temperature molten salt tank is communicated with the heat-releasing side inlet of the high-temperature molten salt tank through the heat-absorbing sides of the molten salt high-temperature flue gas heat exchanger and the molten salt reheating steam heat exchanger, and the heat-releasing side outlet of the high-temperature molten salt tank is communicated with the inlet of the low-temperature molten salt tank;
an outlet of the heat supply network water return pipeline is communicated with a heat absorption side inlet of the high-temperature molten salt tank, and a heat absorption side outlet of the high-temperature molten salt tank is communicated with a heat supply network water supply pipeline;
the low-temperature reheating steam input pipeline is communicated with a low-temperature reheater inlet header, an outlet of the low-temperature reheater inlet header is divided into two paths through a wall type low-temperature reheater, a medium-temperature reheater and a high-temperature reheater, one path is communicated with a steam turbine, the other path is communicated with an inlet of the low-temperature reheater inlet header through a heat releasing side of a fused salt reheating steam heat exchanger, and the steam turbine is connected with a generator.
The outlet of the low-temperature molten salt tank is communicated with the inlet of the low-temperature molten salt tank through a first circulating pump, a first regulating valve, a molten salt high-temperature flue gas heat exchanger, a second regulating valve, the heat absorption side of a molten salt reheating steam heat exchanger, a second circulating pump, a high-temperature molten salt tank, a third regulating valve and a third circulating pump.
The outlet of the high-temperature reheater is divided into two paths, wherein one path is communicated with the steam turbine through a fourth regulating valve, and the other path is communicated with the heat release side of the fused salt reheating steam heat exchanger through a fifth regulating valve.
And a sixth regulating valve is arranged on the heat supply network water return pipeline, and a seventh regulating valve is arranged on the heat supply network water supply pipeline.
The boiler water supply system is characterized by further comprising a boiler water supply pipeline and an eighth regulating valve arranged on the boiler water supply pipeline, wherein the boiler water supply pipeline is communicated with a heat absorption side inlet of the high-temperature molten salt tank.
The system also comprises an economizer inlet pipeline and a ninth regulating valve arranged on the economizer inlet pipeline, wherein the economizer inlet pipeline is communicated with the heat absorption side outlet of the high-temperature molten salt tank.
The utility model discloses following beneficial effect has:
when the power station boiler high-temperature flue gas coupling reheat steam heat storage depth peak regulation system is in specific operation and a unit needs depth peak regulation, fused salt in a low-temperature fused salt tank is sent into a fused salt high-temperature flue gas heat exchanger to absorb heat of high-temperature flue gas, then the fused salt high-temperature flue gas heat exchanger is stored in the high-temperature fused salt tank, and part of output steam of a high-temperature reheater is sent into the fused salt reheat steam heat exchanger to release heat so as to reduce the steam amount entering a steam turbine and then reduce the power generation amount of a generator; when the power generation and supply requirements of the thermal power generating unit are increased, heat generated by the boiler is completely used for heating working medium water, generated steam completely enters the steam turbine to drive the generator to generate power, the generated energy of the generator is improved, high-temperature molten salt in the high-temperature molten salt tank is used for heating return water of a heat supply network, the requirement on heat supply is met, the requirement on flexible deep peak regulation of the thermal power generating unit is met, and the method has the advantages of being simple in system, low in investment cost and high in deep peak regulation potential.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Wherein, 1 is a boiler, 2 is a wall type low-temperature reheater, 3 is a medium-temperature reheater, 4 is a high-temperature reheater, 5 is a low-temperature superheater, 6 is an economizer, 7 is an air preheater, 8 is a steam turbine, 9 is a generator, 10 is a low-temperature reheater inlet header, 11 is a molten salt high-temperature flue gas heat exchanger, 12 is a molten salt reheating steam heat exchanger, 13 is a second circulating pump, 14 is a high-temperature molten salt tank, 15 is a third circulating pump, 16 is a low-temperature molten salt tank, 17 is a first circulating pump, 18 is a fourth regulating valve, 19 is a fifth regulating valve, 20 is a second regulating valve, 21 is a first regulating valve, 22 is a third regulating valve, 23 is an eighth regulating valve, 24 is a sixth regulating valve, 25 is a seventh regulating valve, and 26 is a ninth regulating valve.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1, the power station boiler high temperature flue gas coupling reheat steam heat storage depth peak regulation system of the present invention includes a boiler 1, a low temperature molten salt tank 16, a molten salt reheat steam heat exchanger 12, a high temperature molten salt tank 14, a heat supply network water return pipeline, a heat supply network water supply pipeline, a low temperature reheat steam input pipeline, a low temperature reheater inlet header 10, a steam turbine 8 and a generator 9; a wall type low-temperature reheater 2, a medium-temperature reheater 3, a high-temperature reheater 4, a molten salt high-temperature flue gas heat exchanger 11, a low-temperature superheater 5, an economizer 6 and an air preheater 7 are sequentially arranged in the boiler 1 along the flow direction of flue gas; an outlet of the low-temperature molten salt tank 16 is communicated with a heat release side inlet of the high-temperature molten salt tank 14 through a heat absorption side of the molten salt high-temperature flue gas heat exchanger 11 and the molten salt reheating steam heat exchanger 12, and a heat release side outlet of the high-temperature molten salt tank 14 is communicated with an inlet of the low-temperature molten salt tank 16; an outlet of the heat supply network water return pipeline is communicated with a heat absorption side inlet of the high-temperature molten salt tank 14, and a heat absorption side outlet of the high-temperature molten salt tank 14 is communicated with a heat supply network water supply pipeline; the low-temperature reheating steam input pipeline is communicated with a low-temperature reheater inlet header 10, the outlet of the low-temperature reheater inlet header 10 is divided into two paths after passing through a wall type low-temperature reheater 2, a medium-temperature reheater 3 and a high-temperature reheater 4, one path of the two paths is communicated with a steam turbine 8, the other path of the two paths is communicated with the inlet of the low-temperature reheater inlet header 10 through the heat releasing side of a molten salt reheating steam heat exchanger 12, and the steam turbine 8 is connected with a generator 9.
The outlet of the low-temperature molten salt tank 16 is communicated with the inlet of the low-temperature molten salt tank 16 through a first circulating pump 17, a first regulating valve 21, a molten salt high-temperature flue gas heat exchanger 11, a second regulating valve 20, the heat absorption side of a molten salt reheating steam heat exchanger 12, a second circulating pump 13, a high-temperature molten salt tank 14, a third regulating valve 22 and a third circulating pump 15.
The outlet of the high-temperature reheater 4 is divided into two paths, wherein one path is communicated with the steam turbine 8 through a fourth regulating valve 18, and the other path is communicated with the heat release side of the molten salt reheating steam heat exchanger 12 through a fifth regulating valve 19.
A sixth regulating valve 24 is arranged on the heat supply network water return pipeline, and a seventh regulating valve 25 is arranged on the heat supply network water supply pipeline; the utility model also comprises a boiler water supply pipeline and an eighth regulating valve 23 arranged on the boiler water supply pipeline, wherein the boiler water supply pipeline is communicated with the heat absorption side inlet of the high-temperature molten salt tank 14; the utility model discloses still include economizer inlet pipeline and set up the ninth governing valve 26 on economizer inlet pipeline, wherein, economizer inlet pipeline is linked together with the heat absorption side export of high temperature molten salt jar 14.
The utility model discloses a concrete working process does:
when the thermal power generating unit needs deep peak shaving, the second regulating valve 20 and the first regulating valve 21 are opened, molten salt (180-200 ℃) in the low-temperature molten salt tank 16 enters the molten salt high-temperature flue gas heat exchanger 11 through the first circulating pump 17 to absorb heat of high-temperature flue gas (the flue gas temperature is 550-600 ℃) so that the low-temperature molten salt is heated to 400 ℃, and then the molten salt is sent into the high-temperature molten salt tank 14 through the second circulating pump 13 to store heat, so that the heat absorption capacity of the low-temperature superheater 5 at the tail part of the boiler 1, the economizer 6 and the air preheater 7 is reduced, the flow of main steam of the boiler is reduced, and the.
Meanwhile, on the basis, the fourth regulating valve 18 and the fifth regulating valve 19 are opened, and a part of steam (540 ℃ and 1.3Mpa) output by the high-temperature reheater 4 is sent into the steam turbine 8 to drive the generator 9 to generate electricity; and the other part of the molten salt is sent into a molten salt reheating steam heat exchanger 12 to exchange heat with the molten salt at the temperature of 400 ℃, the molten salt is heated to 480-500 ℃, the temperature of the reheated steam after heat exchange is 280-300 ℃, then the molten salt is sent into a low-temperature reheater inlet header 10 to be mixed with the low-temperature reheated steam, and then the mixed steam enters a wall type low-temperature reheater 2, a medium-temperature reheater 3 and a high-temperature reheater 4 to absorb heat and raise the temperature.
When the power generation and supply requirements of the thermal power generating unit are large, the fifth regulating valve 19, the second regulating valve 20 and the first regulating valve 21 are closed, the third regulating valve 22, the eighth regulating valve 23 or the sixth regulating valve 24, the ninth regulating valve 26 or the seventh regulating valve 25 are opened, the return water of the heat supply network (50 ℃) enters the high-temperature molten salt tank 14 for heat exchange, the water of the heat supply network is heated to 100 ℃ for heat supply to reduce the air extraction quantity of the steam turbine 8 and improve the power generation quantity of the generator 9, or the water (150 ℃) supplied by the boiler 1 is sent into the high-temperature molten salt tank 14 for heat exchange, the water supplied by the boiler 1 is heated to 200 ℃ and then sent into the economizer 6, the air extraction of the steam turbine 8 is reduced, and the power generation quantity of the generator 9 is.
At the moment, all heat generated by the boiler 1 is used for heating working medium water, and all generated steam enters the steam turbine 8 to drive the generator 9 to generate electricity, so that the generating capacity of the generator 9 is improved.
Claims (6)
1. A power station boiler high-temperature flue gas coupling reheat steam heat storage depth peak regulation system is characterized by comprising a boiler (1), a low-temperature molten salt tank (16), a molten salt reheat steam heat exchanger (12), a high-temperature molten salt tank (14), a heat supply network water return pipeline, a heat supply network water supply pipeline, a low-temperature reheat steam input pipeline, a low-temperature reheater inlet header (10), a steam turbine (8) and a generator (9);
a wall type low-temperature reheater (2), a medium-temperature reheater (3), a high-temperature reheater (4), a fused salt high-temperature flue gas heat exchanger (11), a low-temperature superheater (5), an economizer (6) and an air preheater (7) are sequentially arranged in the boiler (1) along the flow direction of flue gas;
an outlet of the low-temperature molten salt tank (16) is communicated with a heat-releasing side inlet of the high-temperature molten salt tank (14) through a heat-absorbing side of the molten salt high-temperature flue gas heat exchanger (11) and the molten salt reheating steam heat exchanger (12), and a heat-releasing side outlet of the high-temperature molten salt tank (14) is communicated with an inlet of the low-temperature molten salt tank (16);
an outlet of the heat supply network water return pipeline is communicated with a heat absorption side inlet of the high-temperature molten salt tank (14), and a heat absorption side outlet of the high-temperature molten salt tank (14) is communicated with a heat supply network water supply pipeline;
the low-temperature reheating steam input pipeline is communicated with a low-temperature reheater inlet header (10), an outlet of the low-temperature reheater inlet header (10) is divided into two paths after passing through a wall type low-temperature reheater (2), a medium-temperature reheater (3) and a high-temperature reheater (4), one path is communicated with a steam turbine (8), the other path is communicated with an inlet of the low-temperature reheater inlet header (10) through a heat release side of a molten salt reheating steam heat exchanger (12), and the steam turbine (8) is connected with a generator (9).
2. The power station boiler high-temperature flue gas coupling reheating steam heat storage depth peak regulation system of claim 1, wherein an outlet of a low-temperature molten salt tank (16) is communicated with an inlet of the low-temperature molten salt tank (16) through a first circulating pump (17), a first regulating valve (21), a molten salt high-temperature flue gas heat exchanger (11), a second regulating valve (20), a heat absorption side of a molten salt reheating steam heat exchanger (12), a second circulating pump (13), a high-temperature molten salt tank (14), a third regulating valve (22) and a third circulating pump (15).
3. The power station boiler high-temperature flue gas coupling reheating steam heat storage depth peak regulation system as claimed in claim 2, characterized in that the outlet of the high-temperature reheater (4) is divided into two paths, wherein one path is communicated with the steam turbine (8) through a fourth regulating valve (18), and the other path is communicated with the heat release side of the molten salt reheating steam heat exchanger (12) through a fifth regulating valve (19).
4. The power station boiler high-temperature flue gas coupling reheating steam heat storage depth peak regulation system as claimed in claim 3, wherein a sixth regulating valve (24) is arranged on a heat supply network water return pipeline, and a seventh regulating valve (25) is arranged on a heat supply network water supply pipeline.
5. The power station boiler high-temperature flue gas coupling reheating steam heat storage depth peak regulation system as claimed in claim 4, further comprising a boiler water supply pipeline and an eighth regulating valve (23) arranged on the boiler water supply pipeline, wherein the boiler water supply pipeline is communicated with a heat absorption side inlet of the high-temperature molten salt tank (14).
6. The power station boiler high-temperature flue gas coupling reheating steam heat storage depth peak regulation system as claimed in claim 5, further comprising an economizer inlet pipeline and a ninth regulating valve (26) arranged on the economizer inlet pipeline, wherein the economizer inlet pipeline is communicated with a heat absorption side outlet of the high-temperature molten salt tank (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021907718.6U CN212869724U (en) | 2020-09-03 | 2020-09-03 | Power station boiler high-temperature flue gas coupling reheat steam heat-storage deep peak regulation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021907718.6U CN212869724U (en) | 2020-09-03 | 2020-09-03 | Power station boiler high-temperature flue gas coupling reheat steam heat-storage deep peak regulation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212869724U true CN212869724U (en) | 2021-04-02 |
Family
ID=75194053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021907718.6U Active CN212869724U (en) | 2020-09-03 | 2020-09-03 | Power station boiler high-temperature flue gas coupling reheat steam heat-storage deep peak regulation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212869724U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111928228A (en) * | 2020-09-03 | 2020-11-13 | 西安热工研究院有限公司 | Power station boiler high-temperature flue gas coupling reheat steam heat storage deep peak regulation system and method |
| CN116182138A (en) * | 2023-04-26 | 2023-05-30 | 国家能源集团山西电力有限公司 | Deep peak regulation energy supply system and method for power generation by thermal-electrolytic coupling of coal-fired unit |
| CN117128494A (en) * | 2023-07-07 | 2023-11-28 | 华北电力大学 | Device and method for jointly starting coal-fired unit by fused salt heat storage and oil-fired boiler |
-
2020
- 2020-09-03 CN CN202021907718.6U patent/CN212869724U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111928228A (en) * | 2020-09-03 | 2020-11-13 | 西安热工研究院有限公司 | Power station boiler high-temperature flue gas coupling reheat steam heat storage deep peak regulation system and method |
| CN116182138A (en) * | 2023-04-26 | 2023-05-30 | 国家能源集团山西电力有限公司 | Deep peak regulation energy supply system and method for power generation by thermal-electrolytic coupling of coal-fired unit |
| CN116182138B (en) * | 2023-04-26 | 2023-06-27 | 国家能源集团山西电力有限公司 | Deep peak regulation energy supply system and method for power generation by thermal-electrolytic coupling of coal-fired unit |
| CN117128494A (en) * | 2023-07-07 | 2023-11-28 | 华北电力大学 | Device and method for jointly starting coal-fired unit by fused salt heat storage and oil-fired boiler |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111928228A (en) | Power station boiler high-temperature flue gas coupling reheat steam heat storage deep peak regulation system and method | |
| CN212869724U (en) | Power station boiler high-temperature flue gas coupling reheat steam heat-storage deep peak regulation system | |
| CN207349038U (en) | One kind is based on carbon dioxide Brayton cycle tower type solar energy thermal power generation peak regulation system | |
| WO2022056990A1 (en) | Combined highly-efficient compression heat pump energy storage and peak regulation system and method for use with thermal power plant | |
| CN110863870B (en) | Inclined temperature layer heat storage peak regulation system and peak regulation method based on high-pressure heating loop | |
| CN112611010B (en) | Adjusting method of flexible adjusting system for power generation load of multi-heat-source cogeneration unit | |
| CN111852595A (en) | Efficient thermal power plant deep peak regulation system and method | |
| CN110529209A (en) | A kind of the solar energy optical-thermal heat reservoir and method of cogeneration units depth peak regulation | |
| CN207004745U (en) | A kind of full load fused salt steam generating system | |
| CN216198464U (en) | Fused salt and steam combined cycle power generation system of internal combustion engine | |
| CN215170237U (en) | Flexible peak shaving system of thermal power plant based on heat storage | |
| CN215170240U (en) | Heat-storage peak regulation system of thermal power plant | |
| CN213395252U (en) | Fused salt energy storage thermal power frequency modulation and peak regulation system | |
| CN113154356A (en) | High-temperature steam composite thermodynamic system and utilization method thereof | |
| CN211875979U (en) | Heat supply load adjusting system based on fused salt heat storage | |
| CN211174242U (en) | Heating season cogeneration unit on-line electricity load adjusting system | |
| CN209195495U (en) | A kind of embedded thermoelectricity peak regulation system of photo-thermal | |
| CN112234650A (en) | Method for calculating thermoelectric peak regulation capacity of solar gas combined cycle unit | |
| CN209540991U (en) | A kind of thermal power plant unit thermoelectricity decoupled system | |
| CN212406831U (en) | High-efficient thermal power plant degree of depth peak shaving system | |
| CN215174935U (en) | High-low temperature heat storage peak shaving system of thermal power plant | |
| CN206309434U (en) | Solar heat and steam power plant's coupled electricity-generation and hot energy storage combined system | |
| CN214745984U (en) | Heating system with secondary low-temperature economizer | |
| CN205678752U (en) | A kind of central heating system of multi-heat source heating | |
| CN210267445U (en) | System for participating in deep peak shaving of unit in non-heat supply period by utilizing solid heat accumulating type electric boiler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |