CN105896709B - A kind of thermo-electric generation energy storage and transmission system applied to boiler reheater - Google Patents

Abstract

The present invention relates to a kind of thermo-electric generation energy storage applied to boiler reheater and transmission systems, including temperature difference electricity generation device, energy storage device and power transmitting device, the temperature difference electricity generation device includes multiple thermo-electric generation units, multiple thermo-electric generation units are connect with energy storage device and power transmitting device respectively by conducting wire, the temperature difference electricity generation device is arranged on boiler reheater, and the hot-fluid smoke contacts in the hot junction of thermo-electric generation unit and the vertical flue of boiler, cold end is contacted with boiler reheater, the energy storage device and power transmitting device are arranged outside boiler compared with prior art, the present invention, which has, improves generating efficiency, improve heat absorption rate, improve heat transfer efficiency, high straightening alternating current is provided, the advantages that making full use of.

Description

A temperature difference power generation energy storage and power transmission system applied to boiler reheaters

technical field

The invention relates to the technical field of heat transfer enhancement and energy saving and emission reduction, in particular to a thermoelectric power generation energy storage and power transmission system applied to a boiler reheater.

Background technique

Thermoelectric power generation uses the Seebeck effect to convert the heat energy generated by the temperature difference between high temperature and low temperature into electric energy, but the electric energy directly generated is DC voltage. If it is stored, it needs to be adjusted by a voltage stabilizer protector before it can be stored; if it is used for transmission, it needs The power supply can only be supplied after being adjusted by the inverter and the voltage regulator protector in turn.

As shown in FIG. 5 , the figure is a schematic structural diagram of an existing power plant generating power based on the Rankine cycle principle. Conventional fossil fuels are usually very inefficient in the process of power generation, and a large amount of energy loss exists in the boiler section in the power plant Rankine cycle, which is caused by the temperature difference between the high-temperature flue gas temperature and the high-pressure steam temperature. Because the combustion temperature in the modern coal-fired power plant boiler boiler furnace is as high as 1700°C, and the temperature of the high-temperature and high-pressure heating surface is generally below 600°C, the temperature difference between the smoke temperature and the working fluid in the heating surface in different areas of the furnace is as high as 1000°C. There is also a temperature difference of 450-700°C in the reheater area. According to the second law of thermodynamics, the greater the heat transfer temperature difference, the greater the irreversible loss. The greater the loss, the worse the economy of the unit. If the heat transfer temperature difference can be utilized, the energy loss in the heat transfer process can be effectively reduced, and the efficiency of thermal power plants based on the Rankine cycle can be improved.

How to obtain the above-mentioned lost energy as effectively as possible, the hot end of the thermoelectric power generation device can be exposed to the hot flow gas, and the cold end is connected to the surface of the boiler reheater, that is, as the boundary conditions of the hot side and the cold side respectively , using the temperature difference to generate additional electric energy through thermoelectric conversion, which has achieved the purpose of energy saving and emission reduction.

Contents of the invention

The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a temperature difference power generation energy storage and energy storage system that can improve power generation efficiency, increase heat absorption rate, improve heat transfer efficiency, provide high-voltage direct and alternating current, and make full use of it in the boiler furnace. power transmission system.

The purpose of the present invention can be achieved through the following technical solutions:

A thermoelectric power generation energy storage and power transmission system applied to a boiler reheater, comprising a thermoelectric power generation device, an energy storage device and a power transmission device, the thermoelectric power generation device includes a plurality of thermoelectric power generation units, and the plurality of thermoelectric power generation units Connect with the energy storage device and the power transmission device respectively through wires, the thermoelectric power generation device is arranged on the boiler reheater, and the hot end of the thermoelectric power generation unit is in contact with the hot flow flue gas of the vertical flue of the boiler, and the cold end is in contact with the boiler reheater The heater is in contact, and the energy storage device and power transmission device are arranged outside the boiler;

When the system is generating electricity, the thermoelectric power generation unit uses the energy generated by the high-temperature flue gas in the horizontal flue of the boiler as the hot end, and the boiler reheater as the cold end, uses the temperature difference to generate electric energy, and transmits it to the energy storage device and power transmission device through wires .

The thermoelectric power generation unit includes sequentially clamped cooling plates, thermoelectric modules, and heat absorbing plates. The heat sink plates are in contact with the boiler reheater tubes on the boiler reheater, and the heat absorbing plates extend into the boiler In the vertical flue.

The thermoelectric power generation unit also includes fins or heat pipes connected to the heat absorbing plate.

The energy storage device includes an energy storage voltage stabilizing protector, an energy storage ammeter and a storage battery sequentially connected by wires, and the energy storage stabilizing protector is connected with a thermoelectric power generation unit.

The power transmission device includes an inverter, a power transmission stabilizer and a power transmission meter, and the thermoelectric power generation unit, the inverter, the power transmission stabilizer protector, the power transmission meter and electrical appliances are sequentially connected by wires.

The multiple thermoelectric power generation units are connected in parallel and then respectively connected to the energy storage device and the power transmission device.

Compared with the prior art, the present invention has the following advantages:

1. Improve power generation efficiency: Excessive heat dissipation loss is the main reason for the low efficiency of semiconductor temperature difference power generation, and it is also the biggest obstacle hindering the promotion of this technology. However, for boilers, due to their reliable thermal insulation, if composite The thermoelectric power generation module, then the heat of the thermoelectric power generation module is directly converted into electric energy, and the remaining heat is transferred to the cold fluid, and there is no energy waste in the whole process. The higher temperature difference between the high-pressure steam and the temperature of the high-pressure steam generates additional electric energy through thermoelectric conversion, reduces a large amount of energy loss in the Rankine cycle, and improves the power generation efficiency of the power plant.

2. Improve the heat absorption rate: the present invention adds a heat-absorbing plate at the hot end of the thermoelectric module, a heat-dissipating plate at the cold end, and multiple sets of fins or heat pipes on the heat-absorbing plate, which increases the contact with the high-temperature flue gas. The contact area can effectively increase the heat absorption rate, so that when the heat transfer resistance is increased due to the addition of the thermoelectric power generation device, the Rankine cycle of the boiler itself is minimally affected, thereby optimizing energy saving.

3. Improve heat transfer efficiency: the present invention adds a heat absorbing plate at the hot end of the thermoelectric module, and adds a heat dissipation plate at the cold end, so that the hot end absorbs heat faster, the cold end dissipates heat faster, and improves the heat transfer efficiency, thereby Increasing the temperature difference between the hot and cold ends makes the thermoelectric power generation unit actually generate more power.

4. Provide high-voltage direct current and alternating current: The electric energy directly generated by a single thermoelectric power generation unit is low-voltage direct current. If several thermoelectric power generation units are connected in parallel with wires, it can not only solve the impact of damage to the entire device due to the damage of a single thermoelectric power generation unit, but also provide high-voltage direct current. ; If energy storage is carried out, it will be stored after being adjusted by the voltage stabilizer protector; if power transmission is carried out, it will be supplied after being adjusted by the inverter and the voltage stabilizer protector in turn.

5. Full utilization: The present invention fully utilizes the generated electric energy by setting up energy storage and transmission systems, realizes the purpose of energy saving and emission reduction, and creates higher economic value.

Description of drawings

Fig. 1 is the structural front view of thermoelectric power generation device;

Fig. 2 is the top view of the structure of the thermoelectric power generation device;

Fig. 3 is the left view of the structure of the thermoelectric power generation device;

Fig. 4 is a schematic diagram of the system structure of the present invention.

Fig. 5 is a schematic structural diagram of an existing power plant generating power based on the Rankine cycle principle.

Among them, 1. Thermoelectric power generation unit, 2. Boiler reheater, 3. Wire, 4. Reheater tube, 5. Heat dissipation plate, 6. Thermoelectric module, 7. Heat absorption plate, 8. Fins or heat pipes, 9 1. Thermoelectric power generation device, 10. Energy storage voltage stabilizer protector, 11. Energy storage ammeter, 12. Storage battery, 13. Inverter, 14. Transmission stabilized voltage protector, 15. Power transmission ammeter, 16. Electrical appliances.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Example:

As shown in Figure 1-4, a thermoelectric power generation energy storage and power transmission system applied to the boiler reheater, the system is set in the boiler furnace, including a thermoelectric power generation device 9, an energy storage device and a power transmission device, and a thermoelectric power generation device 9 It includes a plurality of thermoelectric power generation units 1, which are respectively connected to the energy storage device and the power transmission device through wires 3. The hot end of the thermoelectric power generation unit 1 is in contact with the high-temperature flue gas in the vertical flue of the boiler, and the cold end is in contact with the boiler Reheater 2 contacts;

When the system is generating electricity, the thermoelectric power generation unit 1 uses the energy generated by the high-temperature flue gas in the vertical flue of the boiler as the hot end, and the boiler reheater 2 as the cold end, uses the temperature difference to generate electric energy, and transmits it to the energy storage device through the wire and power transmission devices.

The thermoelectric power generation unit 1 includes a heat dissipation plate 5, a thermoelectric module 6, and a heat absorption plate 7 clamped in sequence. The heat dissipation plate 5 is in contact with the boiler reheater tube 4 in the boiler reheater 2, and the heat absorption plate 7 extends into the vertical Inside the flue.

The thermoelectric unit 1 also includes fins or heat pipes 8 connected to the heat absorbing plate 7 .

The energy storage device includes an energy storage stabilizer protector 10 , an energy storage ammeter 11 and a storage battery 12 sequentially connected by wires, and the energy storage stabilizer protector 10 is connected to the thermoelectric power generation unit 1 .

When the system is storing energy, the thermoelectric power generation device 9 generates high-voltage direct current, which is adjusted to an appropriate voltage by the energy storage stabilizer protector 10 in turn.

The power transmission device includes an inverter 13, a power transmission stabilizer protector 14 and a power transmission meter 15, and the thermoelectric power generation unit 1, the inverter 13, the power transmission stabilizer protector 14, the power transmission meter 15 and the consumer 16 are connected by wires in sequence.

When the system transmits electricity, the thermoelectric power generation device 9 generates high-voltage direct current, which is converted into alternating current through the inverter 13 in turn, and the transmission stabilizer protector 14 adjusts it to a suitable voltage. powered by.

Claims (4)

1. A thermoelectric power generation energy storage and power transmission system applied to a boiler reheater, characterized in that it comprises a thermoelectric power generation device (9), an energy storage device and a power transmission device, and the thermoelectric power generation device (9) includes a plurality of A thermoelectric power generation unit (1), the plurality of thermoelectric power generation units (1) are respectively connected to the energy storage device and the power transmission device through wires (3), and the thermoelectric power generation device (9) is arranged on the boiler reheater (2 ), and the hot end of the thermoelectric power generation unit (1) is in contact with the hot flue gas of the vertical flue of the boiler, and the cold end is in contact with the boiler reheater (2), and the energy storage device and power transmission device are arranged outside the boiler , the thermoelectric power generation unit (1) includes a cooling plate (5), a thermoelectric module (6), and a heat absorbing plate (7) clamped in sequence, and the cooling plate (5) and the boiler reheater (2) The boiler reheater tube (4) on the upper part is in contact with, the heat absorption plate (7) extends into the vertical flue of the boiler, and the thermoelectric power generation unit (1) also includes a heat absorption plate (7) connected Fins or heat pipes (8); When the system is generating electricity, the temperature difference power generation unit (1) uses the energy generated by the high-temperature flue gas in the vertical flue of the boiler as the hot end, and the boiler reheater (2) as the cold end, uses the temperature difference to generate electric energy, and transmits it through the wire For energy storage devices and power transmission devices. 2. A thermoelectric power generation energy storage and power transmission system applied to a boiler reheater according to claim 1, wherein said energy storage device comprises energy storage stabilizer protectors (10 ), an energy storage ammeter (11) and a storage battery (12), and the described energy storage stabilizer protector (10) is connected with the thermoelectric generating unit (1). 3. A thermoelectric power generation energy storage and power transmission system applied to a boiler reheater according to claim 1, wherein the power transmission device includes an inverter (13), a power transmission stabilizer protector (14 ) and transmission meter (15), described thermoelectric generating unit (1), inverter (13), transmission stabilizer protector (14), transmission meter (15) and electrical appliance (16) are connected by wire successively. 4. A thermoelectric power generation energy storage and power transmission system applied to boiler reheaters according to claim 1, characterized in that, the plurality of thermoelectric power generation units (1) are connected in parallel and then respectively connected with The energy storage device is connected to the transmission device.