CN220489117U - Peak regulating system applied to pulverized coal furnace hearth for heating molten salt - Google Patents
Peak regulating system applied to pulverized coal furnace hearth for heating molten salt Download PDFInfo
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- CN220489117U CN220489117U CN202322026248.2U CN202322026248U CN220489117U CN 220489117 U CN220489117 U CN 220489117U CN 202322026248 U CN202322026248 U CN 202322026248U CN 220489117 U CN220489117 U CN 220489117U
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- 150000003839 salts Chemical class 0.000 title claims abstract description 140
- 238000010438 heat treatment Methods 0.000 title claims abstract description 20
- 239000003245 coal Substances 0.000 title claims abstract description 15
- 230000001105 regulatory effect Effects 0.000 title description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000001816 cooling Methods 0.000 claims description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000004568 cement Substances 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 3
- 230000008676 import Effects 0.000 claims 1
- 230000033228 biological regulation Effects 0.000 abstract description 13
- 239000000446 fuel Substances 0.000 abstract description 3
- 238000005338 heat storage Methods 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 10
- 238000009434 installation Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
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Abstract
The utility model discloses a peak shaving system applied to a pulverized coal furnace hearth for heating molten salt, which comprises a boiler-molten salt system and a steam system. In the boiler-molten salt system, a boiler body is connected with a cold and hot salt tank, and low-temperature molten salt is heated by a boiler and then stored in the hot salt tank; in the steam system, a water supply system and a steam turbine are respectively connected with a steam generator, and the two systems are connected through the steam generator. According to the power grid load requirement, the high-temperature molten salt is used for heating circulating water and generating steam to generate power, and after being cooled, the high-temperature molten salt flows to the low-temperature molten salt tank to finish heat storage and release circulation, so that flexible peak regulation is realized, the power consumption peak load is reduced or the power grid peak demand is responded, and the service life of a unit is not influenced and fuel loss is not caused.
Description
Technical Field
The utility model relates to the field of boilers and energy storage, in particular to a peak shaving system applied to a pulverized coal furnace hearth for heating molten salt.
Background
Currently, renewable energy (including electricity, wind power, photovoltaic and biomass) installation in China accounts for about 42% of the total installation proportion, and the electricity generation rate accounts for about 30%. With the propulsion of the double-carbon target, the duty ratio of renewable energy installation such as wind power, photovoltaic and the like and the generated energy is inevitably and continuously increased. The power generation power of the power system needs to be balanced in real time, and because renewable energy sources such as photovoltaic power, wind power and the like generate power to show the characteristics of randomness and anti-peak regulation, the power load structure is diversified, and the daytime and seasonal peak-valley difference is increased.
Meanwhile, in order to ensure the consumption of renewable energy sources, the conventional coal-fired gas unit needs to reduce the output, and particularly, the peak regulation pressure of a power grid is high when the load is low, so that the power system faces severe peak regulation requirements. The coal-fired unit is still the power supply type with the largest installation mode in China, and the national policy is also very urgent to encourage and mobilize the coal-fired unit to participate in the deep peak shaving of the power grid. However, the coal-fired unit directly participates in deep regulation, is frequently started and has large-range load variation, and the coal-fired unit needs to bear large-amplitude temperature variation, so that the key parts are fatigued and damaged. Under the working condition, the service life of the unit and the fuel consumption are increased synchronously, and the safety and the economical efficiency of the operation of the unit can be directly affected.
Disclosure of Invention
The utility model provides a be applied to peak shaving system of pulverized coal furnace heating fused salt, when the electric wire netting electricity low ebb, through boiler furnace high temperature heating fused salt, store high temperature fused salt in the hot salt tank to this reaches the purpose that does not change boiler load and reduces the steam turbine output, reaches the requirement of unit degree of depth peak shaving. When the power consumption of the power grid is high, the high-temperature molten salt in the hot salt tank generates steam through the steam generator to generate electricity for the steam turbine, so that the aim of improving the output of the steam turbine without changing the load of the boiler is fulfilled, and the requirements of the peak of the unit are met.
The peak regulation system applied to the pulverized coal furnace hearth heating molten salt can reduce the peak load of electricity or respond to the peak demand of a power grid under the condition that the unit is not started and stopped frequently and the unit load is not changed in a large range, the power supply quantity is easily adjusted according to the electricity demand, the service life of the unit is not influenced greatly, and the fuel consumption is greatly influenced.
According to the utility model, the high-temperature molten salt is heated by the high temperature of the boiler hearth and stored in the hot salt tank, so that the aim of reducing the output of the steam turbine without changing the load of the boiler is fulfilled, and the requirement of deep peak regulation of a unit is met. When the power consumption of the power grid is high, the high-temperature molten salt in the hot salt tank generates steam through the steam generator to generate electricity for the steam turbine, so that the aim of improving the output of the steam turbine without changing the load of the boiler is fulfilled, and the requirements of the peak of the unit are met.
The utility model adopts the following technical scheme:
the peak regulation system comprises a boiler body, a molten salt heater arranged on the outer wall of the boiler body, a cold salt tank and a hot salt tank which are respectively connected with an inlet and an outlet of the molten salt heater, a steam generator respectively connected with an outlet of the hot salt tank and an inlet of the cold salt tank, a water supply system and a steam turbine respectively connected with a second inlet and a second outlet of the steam generator, and a generator connected with the steam turbine, wherein a low-temperature molten salt pump is arranged between the cold salt tank and the molten salt heater, a high-temperature molten salt pump is arranged between the hot salt tank and the steam generator, and a water supply pump is arranged between the water supply system and the steam generator;
the utility model is further improved in that the molten salt heater comprises a water cooled wall;
the utility model is further improved in that the molten salt heater comprises a water-cooling wall and a molten salt pipe, and heat-conducting cement is arranged between the water-cooling wall and the molten salt pipe;
the utility model is further improved in that the water-cooled wall is formed by welding heat exchange steel pipes and flat steel;
the utility model is further improved in that the cold salt tank, the low-temperature molten salt pump, the molten salt pipe, the hot salt tank, the high-temperature molten salt pump and the steam generator are connected through pipelines to form heat exchange circulation.
Compared with the prior art, the utility model has the beneficial effects that:
the characteristics that the molten salt has no phase change at high temperature and the like are utilized, the molten salt is heated through heat dissipation of the boiler body, steam is obtained through a high-temperature molten salt heating heat exchanger, a steam turbine is driven to generate electricity, and the peak regulation and frequency modulation effects are achieved. According to the utility model, the characteristic advantages of the molten salt are fully exerted, the heating heat source of the molten salt is the heat radiation of the boiler body, stable heat source supply can be ensured under the working conditions of high, medium and low loads of the unit, the high-temperature molten salt is stored by the hot salt tank, the high-temperature molten salt is heated to the heat exchanger according to the requirement, and the circulating water is changed into steam, so that the turbine is driven to generate electricity, peak regulation and frequency modulation in the peak period of electricity consumption are realized, the power supply quantity can be regulated according to the requirement, and the safety and the variable working condition operation of the unit are not influenced.
Drawings
FIG. 1 is a schematic diagram of the overall system of the present utility model;
FIG. 2 is a schematic view of a structure of the molten salt heater 2;
fig. 3 is another schematic structural view of the molten salt heater 2.
The reference numerals are as follows: 1. a boiler body; 2. a molten salt heater; 3. a hot salt tank; 4. a cold salt tank; 5. a high temperature molten salt pump; 6. a low temperature molten salt pump; 7. a steam generator; 8. a steam turbine; 9. a generator; 10. a water supply system; 11. a water feed pump; 21. a water cooling wall; 22. a molten salt pipe; 23. and (5) heat conducting cement.
Detailed Description
The present utility model will be described in further detail with reference to the accompanying drawings.
In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the utility model. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
In addition, an element in the present disclosure may be referred to as being "fixed" or "disposed" on another element or being directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Referring to fig. 1-3, the peak regulation system for heating molten salt in a pulverized coal furnace hearth comprises a boiler body 1, a molten salt heater 2 arranged on the outer wall of the boiler body 1, a cold salt tank 4 and a hot salt tank 3 which are respectively connected with an inlet and an outlet of the molten salt heater 2, a steam generator 7 respectively connected with the outlet of the hot salt tank 3 and an inlet of the cold salt tank 4, a water supply system 10 respectively connected with a second inlet and a second outlet of the steam generator 7, a steam turbine 8, a generator 9 connected with the steam turbine 8, a low-temperature molten salt pump 6 arranged between the cold salt tank 4 and the molten salt heater 2, a high-temperature molten salt pump 5 arranged between the hot salt tank 3 and the steam generator 7, and a water supply pump 11 arranged between the water supply system 10 and the steam generator 7;
the molten salt heater 2 comprises a water cooling wall 21 and a molten salt pipe 22, heat conduction cement 23 is arranged between the water cooling wall 21 and the molten salt pipe 22, and the water cooling wall 21 is formed by welding heat exchange steel pipes and flat steel;
the cold salt tank 4, the low-temperature molten salt pump 6, the water-cooled wall 21 or the molten salt pipe 22, the hot salt tank 3, the high-temperature molten salt pump 5 and the steam generator 7 are connected through pipelines to form a heat exchange cycle;
the water supply system 10, the water supply pump 11, the steam generator 7, the steam turbine 8 and the generator 9 are connected through pipelines to form a steam system, and the generator 9 is used for peak shaving power generation;
specific embodiment case 1:
the concrete layout sectional view of the molten salt heater 2 is shown in fig. 2, the cooling pipes 21 are uniformly distributed on four sides of the boiler body 1, and the working medium in the cooling pipes is low-temperature molten salt.
Specific embodiment case 2:
the whole is the same as case 1, and the difference is that the specific layout sectional view of the heater 2 is shown in fig. 3, the cooling pipes 21 are uniformly distributed on four sides of the boiler body 1, the working medium in the cooling pipes is circulating water, the molten salt pipes 22 are uniformly distributed outside the cooling pipes 21, the working medium in the molten salt pipes 22 is low-temperature molten salt, the two are connected through the heat-conducting cement 23, the heat-conducting cement is favorable for heat conduction, and the heat loss is reduced.
The water-cooled wall 21 exchanges heat of a hearth through working medium water in the heat exchange steel pipe, and then transfers the heat to molten salt in the molten salt pipe 22 through heat conduction cement; the low-temperature molten salt in the cold salt tank 4 is pumped out to the molten salt heater 2 through the low-temperature molten salt pump 6, the heated molten salt is stored in the hot salt tank 3, the high-temperature molten salt in the hot salt tank 3 flows through the steam generator 7 through the high-temperature molten salt pump 5 according to the requirement, and the molten salt after heat release and temperature reduction flows to the cold salt tank 4 to complete the molten salt heat storage and release circulating system.
The utility model is applied to a peak shaving system for heating molten salt in a hearth of a pulverized coal furnace, and when the load of a power grid is low, the high-temperature molten salt heated by a boiler body 1 is stored in a hot salt tank 3; when the load of the power grid is increased, the high-temperature molten salt in the hot salt tank 3 is conveyed into the steam generator 7 through the high-temperature molten salt pump 5, so that the load of the steam turbine 8 is reduced, and the peak regulation effect is achieved. The characteristic advantages of the molten salt are fully exerted, the heating source of the molten salt dissipates heat for the boiler body 1, stable heat source supply can be guaranteed under high, medium and low load working conditions of the unit, the high-temperature molten salt is stored through the hot salt tank 3, and the high-temperature molten salt is changed into steam through the steam generator 7 according to requirements, so that the turbine 8 is driven to generate power, peak regulation and frequency modulation in a power consumption peak period are realized, the power supply quantity can be regulated according to requirements, and the safety and variable working condition operation of the unit are not influenced.
The foregoing is illustrative of the preferred embodiments of the present utility model and is not to be construed as limiting the claims. The present utility model is not limited to the above embodiments, and the specific structure thereof is allowed to vary. It is intended that all such variations as fall within the scope of the appended claims.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Claims (7)
1. A peak shaving system applied to a pulverized coal furnace hearth for heating molten salt is characterized in that: including boiler body (1), molten salt heater (2) of setting on boiler body (1) outer wall, cold salt tank (4), hot salt tank (3) with molten salt heater (2) advance, exit linkage respectively, steam generator (7) with hot salt tank (3) export, cold salt tank (4) access connection, respectively with steam generator's (7) second import, second exit linkage's water supply system (10), steam turbine (8), generator (9) being connected with steam turbine (8), be provided with low temperature molten salt pump (6) between cold salt tank (4) and molten salt heater (2), be provided with high temperature molten salt pump (5) between hot salt tank (3) and steam generator (7), be provided with water supply pump (11) between water supply system (10) and steam generator (7).
2. The peak shaving system for heating molten salt applied to a hearth of a pulverized coal furnace according to claim 1, wherein the peak shaving system is characterized in that: the molten salt heater (2) comprises a water cooled wall (21).
3. The peak shaving system for heating molten salt applied to a hearth of a pulverized coal furnace according to claim 1, wherein the peak shaving system is characterized in that: the molten salt heater (2) comprises a water cooling wall (21) and a molten salt pipe (22), and heat conduction cement (23) is arranged between the water cooling wall (21) and the molten salt pipe (22).
4. A peak shaving system for heating molten salt in a pulverized coal furnace hearth according to claim 2 or 3, characterized in that: the water cooling wall (21) is formed by welding a heat exchange steel pipe and flat steel.
5. The peak shaving system for heating molten salt applied to a hearth of a pulverized coal furnace according to claim 1 or 2, wherein the peak shaving system is characterized in that: the cold salt tank (4), the low-temperature molten salt pump (6), the water cooling wall (21), the hot salt tank (3), the high-temperature molten salt pump (5) and the steam generator (7) are connected through pipelines to form a heat exchange cycle.
6. A peak shaving system for heating molten salt in a pulverized coal furnace hearth according to claim 1 or 3, characterized in that: the cold salt tank (4), the low-temperature molten salt pump (6), the molten salt pipe (22), the hot salt tank (3), the high-temperature molten salt pump (5) and the steam generator (7) are connected through pipelines to form a heat exchange cycle.
7. The peak shaving system for heating molten salt applied to a hearth of a pulverized coal furnace according to claim 1, wherein the peak shaving system is characterized in that: the water supply system (10), the water supply pump (11), the steam generator (7), the steam turbine (8) and the generator (9) are connected through pipelines to form a steam system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322026248.2U CN220489117U (en) | 2023-07-31 | 2023-07-31 | Peak regulating system applied to pulverized coal furnace hearth for heating molten salt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322026248.2U CN220489117U (en) | 2023-07-31 | 2023-07-31 | Peak regulating system applied to pulverized coal furnace hearth for heating molten salt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220489117U true CN220489117U (en) | 2024-02-13 |
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ID=89828979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322026248.2U Active CN220489117U (en) | 2023-07-31 | 2023-07-31 | Peak regulating system applied to pulverized coal furnace hearth for heating molten salt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220489117U (en) |
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2023
- 2023-07-31 CN CN202322026248.2U patent/CN220489117U/en active Active
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