CN115949926A - Hybrid energy heat storage boiler electricity-saving system and control method - Google Patents
Hybrid energy heat storage boiler electricity-saving system and control method Download PDFInfo
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Abstract
The invention relates to a hybrid energy heat storage boiler power saving system and a control method, wherein the hybrid energy heat storage boiler power saving system comprises a conventional boiler, a steam turbine, a generator, a photovoltaic inversion unit, a solar photovoltaic panel, a solar thermal collector, a heat storage water tank and a heat storage boiler which are connected with one another; the electric energy and the heat energy can be stored through the heat storage boiler, the advantages of the power grid and the solar power generation are fully utilized, the waste of the solar grid-connected power generation caused by not being utilized in time is avoided, and the stability of the load of the power grid is facilitated; in addition, solar photovoltaic panel and solar collector can set up at the top of steam power plant's building, and heat accumulation boiler temperature can be regulated and control automatically, and then has effectively combined gas power generation and solar energy heat-retaining system electricity generation, and has made both to link up effectively, prevents that two kinds of gas feed vapour modes from linking up improperly, causes the loss for the unit.
Description
Technical Field
The invention relates to the technical field of boiler energy conservation, in particular to a hybrid energy heat storage boiler electricity-saving system and a control method.
Background
Solar energy is a very abundant natural energy and clean energy, and is beneficial to realizing the overall goal of energy conservation and emission reduction in China. Although the energy of solar energy radiated into the earth's atmosphere is only 22 parts per billion of the total radiated energy, the total energy is already very high, and the total energy radiated into the earth per second is equivalent to 500 ten million tons of standard coal. Wherein 2/3 of China has more than 2000 hours of local sunshine in year, and the annual average radiation quantity exceeds 6000GJ/m 2 . The solar energy is widely applied due to the advantages of abundant solar energy resources, clean utilization and the like, and the solar energy utilization mainly comprises a photovoltaic power generation technology and a solar energy collection technology.
However, solar energy resources are greatly influenced by weather and climate factors, have certain intermittence and randomness, and in order to prolong the system operation time, a heat storage device or an energy storage device is usually added, but the heat storage efficiency is low, the power generation cost is increased, and the reason is the main reason, the existing power generation mode with various energy sources complementary is adopted, the correlation between energy production and energy consumption is small, no advantage complementary is formed, and as an example of a thermal power plant, a solar panel can independently generate power and incorporate electric quantity into a city network, redundant electric energy in a power grid cannot be stored in a certain form, and is not effectively utilized and wasted by a boiler of the thermal power plant; on the other hand, the existing thermal power plant has a large area in the park, is mostly arranged in suburbs or villages and towns, and mostly utilizes the traditional fossil energy to generate electricity and supply heat, and because the park is wide, the solar radiation quantity is large, and the solar energy resource is abundant, but is not reasonably utilized.
Therefore, how to complement solar energy and traditional fossil fuel power generation, exert the energy saving advantage to the maximum extent, enhance the stability between energy production and energy consumption, and maintain the stability of the power grid load becomes a technical problem to be solved urgently by ordinary technicians in the field.
Disclosure of Invention
In order to better solve the technical problems in the background art, the invention provides an electricity-saving system and a control method of a hybrid energy heat storage boiler, and the specific scheme is as follows:
a mixed energy heat storage boiler electricity-saving system comprises a conventional boiler, a steam turbine, a generator, a photovoltaic inversion unit, a solar photovoltaic panel, a solar heat collector, a heat storage water tank and a heat storage boiler, wherein the conventional boiler is connected with a steam turbine gas circuit, the steam turbine is mechanically connected with the generator, the steam turbine drives the generator to generate electricity, the generator is electrically connected with a municipal power grid (namely a municipal power grid), the other end of the municipal power grid is electrically connected with the photovoltaic inversion unit, and the photovoltaic inversion unit is connected with a plurality of solar photovoltaic panels; steam turbine passes through wet return and heat storage water tank water path connection, heat storage water tank again with solar collector water path connection, heat storage water tank's delivery port passes through the outlet pipe and is connected with the heat accumulation boiler, have the heat accumulator in the heat accumulation boiler, carry out the heat-retaining in the heat accumulator from the high temperature water that the outlet pipe flowed in, through the steam that produces behind the heat accumulator heating gets into in the steam pipe, the steam pipe is connected with the steam turbine gas circuit.
The conventional boiler can be a gas boiler, an oil boiler or an electric boiler, and in the peak period of power utilization in the daytime, the solar photovoltaic panel receives solar energy, converts the solar energy into electric energy, converts the electric energy into alternating current meeting the power requirement of a city grid through the photovoltaic inversion unit, and merges the alternating current into a commercial power grid; meanwhile, the solar heat collector converts light heat energy into heat energy, hot water is continuously stored in the heat storage water tank, a heat accumulator in the heat storage boiler is heated, the temperature of the heat accumulator is increased, and the heat accumulator is made of a phase-change material; at the low peak period of power consumption at night, the water in the heat storage boiler is heated by utilizing the latent heat of phase change released during the high-temperature phase change of the material, the high-temperature water is quickly vaporized and converted into high-temperature and high-pressure water vapor, meanwhile, a water pump and a control unit which are connected to a municipal power grid can utilize the electric quantity generated by solar energy in the daytime, and further, through the gas and solar energy power generation in the daytime, partial solar power generation is consumed at night, the stability of the load of the commercial power grid in the whole day is maintained, the purpose of 'peak clipping and valley filling' of a public power system is realized, and compared with a conventional boiler which is simply operated, the energy-saving effect is more remarkable.
Preferably, still be provided with a plurality of electric heating boards in the heat accumulation boiler, every electric heating board all sets up with the heat accumulator interval, electric heating board passes through the power transmission line and is connected with the city net.
And the water return pipe is provided with a circulating water pump for driving water to perform waterway circulation among the steam pipe, the water return pipe, the circulating water pump, the water outlet pipe and other pipelines.
In areas with weak solar energy resources, high-temperature water is converted into steam through electric energy auxiliary heating; the solar photovoltaic panel can be used for grid-connected power generation, the generated electric energy is charged into a city grid, the heat loss of the grid is removed according to the relation of energy conservation, most of the electric energy generated by the solar photovoltaic panel is used for supplying power to the electric heating plate, the water pump and the control unit, and compared with a common heat supply boiler which is only used for burning fossil fuel, the solar photovoltaic panel is beneficial to saving energy consumption, maintaining the stability of grid load and realizing 'peak clipping and valley filling' of a power system.
Preferably, the solar photovoltaic panel, the solar thermal collector and the heat storage water tank are arranged above a building of the thermal power plant, so that solar energy is fully utilized for power generation and heat supply, and cogeneration of renewable energy is better realized.
Be provided with a plurality of temperature sensor in the heat accumulation boiler, it is a plurality of temperature sensor passes through the wire and is connected with the outside the control unit of heat accumulation boiler to evenly set up the top at the regenerator of heat accumulation boiler, the control unit is connected with touch screen display element, memory, through touch screen display element sets up preset temperature threshold value and preset operating time period, preset temperature and preset time data storage are in the memory, preset operating time period includes first preset operating time period and first preset operating time period.
On the basis of the hybrid energy heat storage boiler electricity-saving system, the invention further provides a control method for the hybrid energy heat storage boiler electricity-saving system, and the control method comprises the following steps:
and (4) SS1: setting a preset temperature threshold value [ T ] through a touch screen display unit set1 ，T set2 ]A first preset operating time interval delta H1 and a second preset operating time interval delta H2, wherein T set1 ＜T set2 And T is set1 Greater than or equal to the vaporization temperature T of water r ；
The first preset operation time period delta H1 refers to the operation time of the hybrid energy heat storage boiler electricity-saving system, and the second preset operation time period delta H2 refers to the operation time of the circulating water pump during operation.
And (4) SS2: when the time point is in a preset operation time period delta H1, controlling the conventional boiler to start, driving the steam turbine and the generator to generate electricity, and switching on a circuit by a solar photoelectric plate;
and (4) SS3: on the basis of the step SS2, when the time point is in a preset operation time period delta H2, the circulating water pump is started, and the temperature T measured by the n temperature sensors is monitored in real time 1 、T 2 ……、T n And calculating the average temperature value T in the heat storage boiler avg Wherein, T avg =（T 1 +T 2 ……+T n ）/n；
And (4) SS: when the assay is in the 80% Δ H2 time period, T avg Is still less than T set1 Starting the electric heating plate to heat;
and SS5: when T is avg In [ T ] set1 ，T set2 ]When the steam supply quantity of the conventional boiler is within the range, reducing the steam supply quantity of the conventional boiler and increasing the steam supply quantity of the heat storage boiler;
the steam supply amount can be adjusted by a valve on the pipeline.
And SS6: when T is avg >T set2 And stopping the conventional boiler to operate, so that the system completely depends on the steam supply of the heat storage boiler.
In summary, compared with the prior art, the hybrid energy heat storage boiler power saving system provided by the invention has the advantages that:
(1) Compared with the traditional heat supply boiler only adopting stone fuel for combustion and a mixed energy heat storage boiler, the energy-saving system has obvious electricity-saving effect;
(2) The stability of the load of the commercial power grid is kept, and the realization of the general target of 'peak clipping and valley filling' of the power system is facilitated;
(3) The electric energy and the heat energy can be stored through the heat storage boiler, the advantages of the power grid and the solar power generation are fully utilized, the waste of the solar grid-connected power generation due to untimely utilization is avoided, and the stability of the load of the power grid is facilitated;
(4) Solar photovoltaic panel and solar collector can set up at the top of steam power plant's building, and heat accumulation boiler temperature can be regulated and control automatically, and then has effectively combined gas power generation and solar energy heat-retaining system electricity generation, and has made both to link up effectively, prevents that two kinds of gas feed vapour modes from linking up improperly, causes the loss for the unit.
Drawings
FIG. 1 is a schematic view of an electricity saving system of a heat storage boiler using hybrid energy according to embodiment 1 of the present invention;
FIG. 2 is a schematic view of an electricity saving system of a heat storage boiler using hybrid energy according to embodiment 2 of the present invention;
FIG. 3 is a detailed view of the internal structure of a heat storage boiler according to embodiment 2 of the present invention;
FIG. 4 is a graph showing the temperature change with the heat storage body in the heat storage boiler according to example 2 of the present invention;
in the figure, 1-conventional boiler; 2-a steam turbine; 3, a generator; 4-city network; 5-a photovoltaic inverter unit; 6-solar photovoltaic panel; 7-a solar heat collector; 8-heat storage water tank; 9-heat storage boiler; 10-a heat accumulator; 11-an electrical heating plate; 12-a steam tube; 13-a water return pipe; 14-a circulating water pump; 15-water outlet pipe; 16-a gas supply tube; 17-a separator; 18-a burner;
9-1-a combustion chamber; 9-2-regenerator; 9-3-steam outlet; 9-4-water inlet.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the following further describes the technical solutions of the present invention with reference to specific embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
Referring to fig. 1, a hybrid energy heat storage boiler power saving system includes a conventional boiler 1, a steam turbine 2, a generator 3, a photovoltaic inverter unit 5, a solar photovoltaic panel 6, a solar thermal collector 7, a heat storage water tank 8, and a heat storage boiler 9, wherein the conventional boiler 1 is connected with the steam turbine 2 through a gas path, the steam turbine 2 is mechanically connected with the generator 3, a main shaft of the steam turbine 2 drives a rotor of the generator to rotate to generate power, the generator 3 is electrically connected with a municipal grid 4 (i.e., a municipal power grid), the other end of the municipal grid 4 is electrically connected with the photovoltaic inverter unit 5, and the photovoltaic inverter unit 5 is connected with a plurality of solar photovoltaic panels 6; on the other hand, the steam turbine 2 is connected with the heat storage water tank 8 through a water return pipe 13, the heat storage water tank 8 is connected with the solar heat collector 7 through a water path, so as to store high-temperature water after heat exchange of the solar heat collector 7, a water outlet of the heat storage water tank 8 is connected with the heat storage boiler 9 through a water outlet pipe 15, the heat storage boiler 9 is provided with a heat accumulator 10, the high-temperature water flowing in from the water outlet pipe 15 stores heat in the heat accumulator 10, steam generated after heating through the heat accumulator 10 is connected with the steam turbine 2 through a steam pipe 12, and the high-pressure high-temperature steam through the steam pipe 12 drives blades of the steam turbine 2 to rotate, so that heat energy is converted into kinetic energy.
The mixed energy heat storage boiler electricity-saving system is provided with a conventional boiler 1 and a heat storage boiler 9, the conventional boiler 1 and the heat storage boiler 9 are connected in parallel, the conventional boiler 1 can adopt a gas-fired boiler, an oil-fired boiler or an electric boiler, in daytime, the electricity consumption peak period belongs to, a solar photoelectric plate 6 receives solar energy, the solar energy is converted into electric energy, the electric energy is converted into alternating current meeting the power requirement of the urban network through a photovoltaic inversion unit 5, meanwhile, a solar heat collector 7 converts the light heat energy into heat energy, hot water is continuously stored in a heat storage water tank 8 and then is conveyed to the heat storage boiler 9, the heat storage body stores heat through the heat storage body, the heat storage body adopts a phase-change material, preferably, a Si-Al alloy phase-change material (belongs to a high-temperature phase-change material) is selected, and as the boiling point of the heat storage body is higher than that of water, the heat storage body can slowly absorb heat at low temperature, the heat is continuously increased in heat absorption rate, when the heat storage body reaches the phase-change temperature, the phase-change latent heat storage body can be quickly released, so that water in the heat storage boiler 9 is quickly vaporized and is converted into high-temperature gaseous water vapor, and a powerful power source is provided for driving a steam turbine 2 to operate.
Therefore, in the hybrid energy heat storage boiler power saving system, in the daytime and when the outdoor temperature is high, only the conventional boiler 1 operates, the generated high-temperature steam can be used for industrial production, the steam turbine 2 can be driven to rotate, the generator 3 is driven to generate electricity, and meanwhile, the solar power generation is combined, so that the load stability of a power grid is maintained, and the power grid fluctuation caused by a large amount of electricity in the daytime is prevented; in the afternoon or at night, when the outdoor temperature is low, the heat accumulator 10 is continuously heated in the daytime, the heat accumulator 10 and the heat accumulation boiler 9 form a high temperature difference, after the heat accumulator 10 releases heat through phase change, high-temperature liquid water is quickly vaporized into high-temperature high-pressure water vapor, the high-temperature high-pressure water vapor is changed into high-temperature high-pressure gaseous water vapor, at the moment, heat accumulation heat energy can be utilized for power generation, the steam quantity of the conventional boiler 1 is reduced, or the conventional boiler 1 is stopped to run.
Further, still be provided with a plurality of electric heating board 11 in the heat accumulation boiler 9, every electric heating board 11 all sets up with heat accumulator 10 interval, and electric heating board 11 is connected with city net 4 through the power transmission line, and this means: in some regions with insufficient solar energy resources, water cannot be converted into steam through the solar thermal collector 7, so that electric energy is needed for auxiliary heating, and the solar photovoltaic panel 6 can be used for grid-connected power generation, so that the generated electric energy is charged into the urban network 4
The water return pipe 13 is provided with a circulating water pump 14 for driving water to perform waterway circulation among the steam pipe 12, the water return pipe 13, the circulating water pump 14, the water outlet pipe 15 and other pipelines, so that the heat loss of the power grid is removed according to the relation of energy conservation, most of electric energy generated by the solar photovoltaic panel 6 is substantially used for supplying power to the electric heating panel 11 and the circulating water pump 14, and therefore, the electric heating panel 11 and the circulating water pump 14 do not consume extra electric energy.
On the other hand, when the electric heating plate 11 is arranged in the heat storage boiler 9, the electric heating plate 11 and the circulating water pump 14 are started to use electricity in the afternoon or at night, so that the 'peak clipping and valley filling' effects on the power system can be realized, the peak valley electricity of the commercial power grid is reasonably utilized, and the stability of the commercial power grid system is kept.
Example 2
Please examine fig. 2, a hybrid energy heat storage boiler power saving system, including a conventional boiler 1, a steam turbine 2, a generator 3, a city grid 4, a photovoltaic inversion unit 5, a solar photovoltaic panel 6, a solar thermal collector 7, a heat storage water tank 8, and a heat storage boiler 9, wherein the conventional boiler 1 is connected with the steam turbine 2 by a gas circuit, the steam turbine 2 is mechanically connected with the generator 3, a main shaft of the steam turbine 2 drives a rotor of the generator to rotate for power generation, the generator 3 is electrically connected with the city grid 4, the other end of the city grid 4 is electrically connected with the photovoltaic inversion unit 5, and the photovoltaic inversion unit 5 is connected with a plurality of solar photovoltaic panels 6; on the other hand, the steam turbine 2 is connected with the heat storage water tank 8 through a water return pipe 13, the heat storage water tank 8 is connected with the solar heat collector 7 through a water path, so as to store high-temperature water after heat exchange of the solar heat collector 7, a water outlet of the heat storage water tank 8 is connected with the heat storage boiler 9 through a water outlet pipe 15, the heat storage boiler 9 is provided with a heat accumulator 10, the high-temperature water flowing in from the water outlet pipe 15 stores heat in the heat accumulator 10, steam generated after heating through the heat accumulator 10 passes through the steam pipe 12 in the steam turbine 2, blades of the steam turbine 2 are driven to rotate, and heat energy is converted into kinetic energy.
The hybrid energy heat storage boiler electricity-saving system is provided with a conventional boiler 1 and a heat storage boiler 9, wherein the conventional boiler 1 is connected with the heat storage boiler 9 through an air path, and in the embodiment, the conventional boiler 1 can adopt a gas-fired boiler. In daytime, belong to the power consumption peak period, solar photovoltaic board 6 receives solar energy, turns into the electric energy with light energy to turn into the alternating current that accords with the power requirement of city net through photovoltaic inverter unit 5, simultaneously, solar collector 7 turns into light heat energy into heat energy, constantly stores hot water in heat storage water tank 8, and then carries for heat accumulation boiler 9, through heat accumulator heat accumulation, the heat accumulator adopts phase change material.
Therefore, the hybrid energy heat storage boiler electricity-saving system only operates the conventional boiler 1 when the outdoor temperature is high in the daytime, the generated high-temperature steam can drive the steam turbine 2 to rotate and drive the generator 3 to generate electricity besides being used for industrial production, and meanwhile, the solar energy power generation is combined to maintain the load stability of a power grid and prevent the power grid from fluctuating due to large amount of power consumption in the daytime; at night, when outdoor temperature was lower, because daytime heat accumulator 10 was constantly heated, heat accumulator 10 and heat accumulation boiler 9 have formed the temperature difference, and heat accumulator 10 takes place the phase transition release latent heat under the higher temperature for the water in the heat accumulation boiler 9 vaporizes fast, changes into the high-temperature high-pressure gaseous vapor, and then provides powerful power supply for driving the operation of steam turbine 2.
In this embodiment, the heat storage boiler 9 is connected to the air supply pipe 16, and the other end of the air supply pipe 16 is connected to the conventional boiler 1, so that in rainy days or winter, because the outdoor temperature is high, the solar radiation heat obtained by the solar heat collector 7 is low, the heat transferred to the heat storage body 10 is also low, and the water cannot be heated into steam, and therefore, the intermediate temperature water in the heat storage boiler 9 is heated and vaporized by auxiliary heating through the fuel gas.
Further, please consider fig. 3, the heat storage boiler 9 is a horizontal cylinder, one end of the heat storage boiler 9 is connected to a burner 18, the burner 18 is connected to a gas supply pipe 16, a sealed partition 17 is disposed inside the heat storage boiler 9, the inside of the heat storage boiler 9 is partitioned into two independent chambers by the partition 17, that is, a combustion chamber 9-1 located at the lower part and a heat storage chamber 9-2 located at the upper part, a plurality of heat accumulators 10 are embedded in the heat storage chamber 9-2, the heat accumulators 10 are spaced from each other to facilitate water flowing between the heat accumulators, and an overflow channel is formed at the upper part of the heat accumulator 10 to facilitate water vapor flowing.
The top of the regenerative chamber 9-2 is provided with a steam outlet 9-3 and a water inlet 9-4 in a penetrating way, the steam outlet 9-3 is connected with a steam pipe 12, and the water inlet 9-4 is connected with a water outlet pipe 15. Particularly, the water inlet 9-4 is arranged at the side of the regenerative chamber 9-2 far away from the combustor 18, so that the countercurrent heat exchange is favorably formed, and the strong heat exchange effect is enhanced.
To further illustrate the heat exchange effect of the heat storage boiler structure of the present invention, please examine fig. 4, if the last stage of heat accumulator close to the steam outlet 9-3 is the # 1 heat accumulator, and the last stage close to the water inlet 9-4 is the # N heat accumulator, then in the incoming flow direction of hot water, the temperature in the heat accumulator decreases gradually in a step shape, and the temperature in the heat accumulator increases gradually in an exponential shape, because the combustion of the gas in the lower heat accumulator 9-2 is finally used to heat the upper heat accumulator 10, by arranging the water inlet 9-4 at the side of the heat accumulator 9-2 far from the burner 18, the final temperature of each stage of heat accumulator can be kept substantially the same, which is further beneficial to not only enhancing the heat exchange, improving the heat exchange efficiency, but also maintaining the vapor pressure balance and the heat exchange stability of each part in the heat accumulator 9-2.
The water return pipe 13 is also provided with a circulating water pump 14 for driving water to circulate in a water path among the steam pipe 12, the water return pipe 13, the circulating water pump 14, the water outlet pipe 15 and other pipelines. The circulating water pump 14 is connected to the city network 4, and can utilize electric energy generated by solar energy.
Compared with the technical scheme in the embodiment 1, the hybrid energy heat storage boiler power saving system in the embodiment only starts the conventional boiler 1 to operate to generate power in the weather of abundant solar energy, and meanwhile, the power is supplemented to the urban power grid by combining the solar power generation to maintain the stable load of the power grid; in rainy days or winter, the heat storage boiler 9 is heated by gas in an auxiliary way, so that the heat storage body 10 is heated rapidly and changes phase, the intermediate-temperature liquid water is vaporized rapidly and is converted into gaseous steam, and the heat storage heat energy is utilized to generate electricity. Obviously, even when the solar energy is not abundant, the solar energy and the fuel gas can be used for generating electric energy, and compared with the power generation by simply using the fuel gas, the energy-saving effect is obvious.
Example 3
Generally speaking, thermal power plant keeps away from the city center setting, and the place is located suburb, village and town and valley, utilizes traditional fossil fuel to generate electricity and heat supply more, because the thermal power plant area is wide, and the solar radiation heat that receives is big, and solar energy resource is very abundant, consequently, all set up solar photovoltaic panel 6, solar collector 7, heat storage water tank 8 in the top of thermal power plant's building, and the solar energy that can be abundant generates electricity and supplies heat, realizes renewable energy's cogeneration better.
A plurality of temperature sensors are arranged in the heat storage boiler 9 and are connected with a control unit outside the heat storage boiler through a lead, the temperature sensors are K-type thermocouple thermometers, n K-type thermocouple thermometers are uniformly arranged above a heat storage chamber 9-2 of the heat storage boiler, the control unit is connected with a touch screen display unit and a memory, a preset temperature threshold value and preset operation time can be set through the touch screen display unit, and preset temperature and preset time data are stored in the memory.
On the basis of embodiment 1, the present invention further provides a control method for an electricity saving system of a hybrid energy heat storage boiler, the control method is based on the electricity saving system for the hybrid energy heat storage boiler, and the control method comprises the following steps:
and (4) SS1: setting a preset temperature threshold value [ T ] through a touch screen display unit set1 ，T set2 ]A first predetermined operating time interval Δ H1 and a second predetermined operating time interval Δ H2, where T set1 ＜T set2 And T is set1 Greater than or equal to the vaporization temperature T of water r ；
The first preset operation time period Δ H1 refers to the operation time of the hybrid energy heat storage boiler power saving system, and the second preset operation time period Δ H2 refers to the operation time of the circulating water pump 14 during operation, for example, Δ H1 may be 5 years or 10 years, Δ H2 may be am9:00 to pm7 in summer, or am10:30 to pm6 in winter.
And SS2: when the time point is in a preset operation time period delta H1, controlling the conventional boiler 1 to start, driving the steam turbine 2 and the generator 3 to generate electricity, and switching on the solar photoelectric plate 6 by a circuit;
and SS3: on the basis of the step SS2, when the time point is within the preset operation time period Δ H2, the circulating water pump 14 is started, and the temperatures T measured by the n temperature sensors are monitored in real time 1 、T 2 ……、T n And calculating the average temperature T in the heat storage boiler avg Wherein, T avg =（T 1 +T 2 ……+T n ）/n；
And (4) SS: when the assay is in the 80% Δ H2 time period, T avg Is still less than T set1 Then, the electric heating plate 11 is started to heat;
SS5: when T is avg In [ T ] set1 ，T set2 ]Within range, decrease is oftenThe steam supply amount of the regular boiler 1 is increased, and the steam supply amount of the heat storage boiler 9 is increased;
the steam supply amount can be adjusted through a valve on the pipeline.
And SS6: when T is avg >T set2 When the system is running, the normal boiler 1 is stopped, and the system completely depends on the heat storage boiler 9 for steam supply.
In conclusion, compared with the existing thermal power plant boiler system, the hybrid energy heat storage boiler power-saving system provided by the invention has an obvious power-saving effect and achieves the purposes of 'peak clipping and valley filling' of the power system; the electric energy and the heat energy can be stored through the heat storage boiler, the advantages of the power grid and the solar power generation are fully utilized, the waste of the solar grid-connected power generation caused by not being utilized in time is avoided, and the stability of the load of the power grid is facilitated; in addition, solar photovoltaic panel and solar collector can set up at the top of steam power plant's building, and heat accumulation boiler temperature can be regulated and control automatically, and then has effectively combined gas power generation and solar energy heat-retaining system electricity generation, and has made both to link up effectively, prevents that two kinds of gas feed vapour modes from linking up improperly, causes the loss for the unit.
The above embodiments are provided to further explain the objects, technical solutions and advantages of the present invention in detail, it should be understood that the above embodiments are only examples of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A hybrid energy thermal storage boiler power saving system comprising: conventional boiler, steam turbine, generator, photovoltaic contravariant unit, solar photovoltaic board, solar collector, heat storage water tank, heat accumulation boiler, its characterized in that:
the conventional boiler is connected with a steam turbine through a gas circuit, the steam turbine is mechanically connected with a generator, the steam turbine drives the generator to generate electricity, the generator is electrically connected with a city grid, the other end of the city grid is electrically connected with a photovoltaic inversion unit, and the photovoltaic inversion unit is connected with a plurality of solar photovoltaic panels;
steam turbine passes through wet return and heat storage water tank water path connection, the heat storage water tank again with solar collector water path connection, the delivery port of heat storage water tank passes through the outlet pipe and is connected with the heat accumulation boiler, have the heat accumulator among the heat accumulation boiler, carry out the heat-retaining in the heat accumulator from the high temperature water that the outlet pipe flowed in, the heat accumulation boiler is connected with the steam pipe, the steam pipe is connected with the steam turbine gas circuit.
2. The hybrid energy storage boiler power saving system of claim 1, wherein: the conventional boiler is connected with the heat storage boiler in parallel, and the conventional boiler adopts any one of a gas boiler, an oil boiler or an electric boiler.
3. The electricity saving system of a hybrid energy storage boiler of claim 2, wherein: the heat storage boiler is internally provided with a heat accumulator, and the heat accumulator is made of a high-temperature phase-change material.
4. The hybrid energy storage boiler power saving system of claim 1, wherein: the heat storage boiler is characterized in that a plurality of electric heating plates are further arranged in the heat storage boiler, each electric heating plate is arranged at an interval with the heat accumulator, and the electric heating plates are connected with a city network through power transmission lines.
5. The hybrid energy storage boiler power saving system of claim 1, wherein: and a circulating water pump is arranged on the water return pipe and used for driving water to perform water path circulation among the pipelines such as a steam pipe, the water return pipe, the circulating water pump and the water outlet pipe.
6. The hybrid energy storage boiler power saving system of any one of claims 1 to 5, wherein: a plurality of temperature sensors are arranged in the heat storage boiler, are connected with a control unit outside the heat storage boiler through leads and are uniformly arranged in a heat storage chamber of the heat storage boilerThe control unit is connected with a touch screen display unit and a memory, and a preset temperature threshold value T is set through the touch screen display unit set1 ，T set2 ]And a preset operating time period, said preset temperature threshold [ T [ ] set1 ，T set2 ]And storing preset time data in a memory, wherein the preset operation time period comprises a first preset operation time period delta H1 and a first preset operation time period delta H2;
the first preset operation time period delta H1 refers to the operation time of the hybrid energy heat storage boiler electricity-saving system, and the second preset operation time period delta H2 refers to the operation time of the circulating water pump during operation.
7. A control method for a hybrid energy storage boiler power saving system according to claim 6, the control method comprising the steps of:
SS1: setting a preset temperature threshold [ T ] through a touch screen display unit set1 ，T set2 ]A first preset operating time interval delta H1 and a second preset operating time interval delta H2, wherein T set1 ＜T set2 And T is set1 Greater than or equal to the vaporization temperature T of water r ；
And SS2: when the time point is in a preset operation time period delta H1, controlling the conventional boiler to start, driving the steam turbine and the generator to generate electricity, and switching on a circuit by a solar photoelectric plate;
and (4) SS3: on the basis of the step SS2, when the time point is in a preset operation time period delta H2, the circulating water pump is started, and the temperature T measured by the n temperature sensors is monitored in real time 1 、T 2 ……、T n And calculating the average temperature T in the heat storage boiler avg Wherein, T avg =（T 1 +T 2 ……+T n ）/n；
And SS4: when the assay is in the 80% Δ H2 time period, T avg Is still less than T set1 Starting the electric heating plate to heat;
and SS5: when T is avg In [ T ] set1 ，T set2 ]Within range, decrease the constantIncreasing the steam supply amount of the heat storage boiler according to the steam supply amount of the conventional boiler;
and SS6: when T is avg >T set2 And stopping the conventional boiler to operate, so that the system completely depends on the steam supply of the heat storage boiler.
8. The hybrid energy storage boiler power saving system of claim 1, wherein: the conventional boiler and the heat storage boiler are connected through a gas supply pipe.
9. The electricity saving system of claim 8, wherein: the combustor is connected to heat accumulation boiler's one end, the combustor is connected with the air supply pipe, heat accumulation boiler inside is provided with sealed baffle, through the baffle is the combustion chamber and the regenerator on upper portion of lower part with heat accumulation boiler's internal partitioning, it is equipped with a plurality of heat accumulators to inlay in the regenerator.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116105215A (en) * | 2023-04-14 | 2023-05-12 | 四川蜀旺新能源股份有限公司 | Building heat supply energy storage equipment based on cogeneration |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116105215A (en) * | 2023-04-14 | 2023-05-12 | 四川蜀旺新能源股份有限公司 | Building heat supply energy storage equipment based on cogeneration |
| CN116105215B (en) * | 2023-04-14 | 2023-06-09 | 四川蜀旺新能源股份有限公司 | Building heat supply energy storage equipment based on cogeneration |
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Application publication date: 20230411 |