Heat energy recovery device of thermoelectric system

Abstract

The utility model discloses a heat energy recovery device of a thermoelectric system, which comprises a boiler body, a steam turbine arranged on the side edge of the boiler body, a generator arranged on the side edge of the steam turbine, a recovery assembly arranged on the side edge of the generator and used for recovering heat energy, the recovery assembly comprises a main transformer, and a double-winding transformer arranged on the outer wall of the main transformer. According to the utility model, the mechanism design of the recycling assembly is utilized, the generator is connected to the 10kv bus of the main transformer, and the bus is connected with the new double-winding transformer, so that the device is convenient to use, the newly added transformer is adopted to quickly reduce the load, and the energy consumption is reduced. Meanwhile, water is heated by using redundant electricity to provide free energy for heat dissipation, so that the utilization efficiency of new energy is greatly improved; wind and light abandoning problems are avoided, and safe and stable operation of a power grid is ensured. The deep peak regulation income is obtained, and the new energy consumption of the power grid is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power generation and distribution systems, in particular to a heat energy recovery device for a thermoelectric system. Background Art

[0002] In recent years, as wind power continues to develop rapidly, the requirements for traditional thermal power units have become increasingly higher. Thermal power units need to quickly reduce their on-grid power generation to make way for renewable energy power generation. When renewable energy power generation output is insufficient, thermal power units need to quickly increase their on-grid power generation to fill the gap. This move has become the deep peak regulation of thermal power units. However, due to the insufficient peak regulation capacity of some thermal power units, some areas have experienced serious wind abandonment problems.

[0003] As the installed capacity of new energy units continues to expand, the demand for deep peak regulation of thermal power generating units is still strong. If the generating units are frequently started and the load changes over a large range, the coal-fired units need to withstand large temperature changes, resulting in fatigue damage to key components. Under such conditions, the unit life and fuel loss increase simultaneously, directly affecting the safety and economy of the unit operation. Therefore, in order to avoid this situation, it is necessary to design a heat recovery device for the thermal power system to solve this problem. Utility Model Content

[0004] The purpose of the utility model is to provide a heat energy recovery device for a thermoelectric system to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a heat energy recovery device of a thermoelectric system, comprising a boiler body, a steam turbine is arranged on the side of the boiler body, a generator is arranged on the side of the steam turbine, a recovery component for heat energy recovery is arranged on the side of the generator, the recovery component comprises a main transformer, a double-winding transformer is arranged on the outer wall of the main transformer, and a 10kv bus is arranged at the connection between the main transformer and the generator and the double-winding transformer.

[0006] Preferably, a steam boiler for providing steam is disposed on one side of the outer wall of the 10kv busbar, and a hot water boiler for providing hot water is disposed on the other side of the outer wall of the 10kv busbar.

[0007] Preferably, a steam pipe for conveying steam is provided at the bottom of the steam boiler, and a hot water user pipe for providing hot water to users is provided at the bottom of the hot water boiler.

[0008] Preferably, the outer wall of the double-winding transformer is provided with a plant transformer load device.

[0009] Preferably, a heat network heater for heating heat network water is provided at the bottom of the steam boiler and on the side of the steam pipeline, and a steam-water heat exchanger is provided on the side of the heat user pipeline and on the bottom of the heat network heater.

[0010] Preferably, a steam user pipeline for providing high-pressure steam to users is provided at the bottom of the steam pipeline.

[0011] Preferably, the plant transformer load device is internally provided with low-voltage equipment for assisting the operation of the thermal power system.

[0012] Technical effects and advantages of the utility model:

[0013] The utility model utilizes the mechanism design of the recycling component, the generator is connected to the 10kv busbar of the main transformer, the 10kv busbar is connected to a new double-winding transformer, the high-voltage side of the main transformer and the double-winding transformer is a triangle connection, the low-voltage side winding is a star connection, the neutral point of the transformer star side winding is connected through a resistor, it is easy to use, the new transformer is used for rapid load reduction, and the excess electricity is used to heat the water to provide free energy heat dissipation, which greatly improves the efficiency of new energy utilization; avoids the problem of wind abandonment and light abandonment, and ensures the safe and stable operation of the power grid. Obtain deep peak regulation benefits and increase the power grid's new energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram showing the composition principle of the recycling component of the utility model.

[0015] In the figure: 1. Boiler body; 2. Steam turbine; 3. Generator; 301. Double-winding transformer; 302. 10kv busbar; 303. Plant transformer load equipment; 304. Steam boiler; 305. Hot water boiler; 306. Steam pipeline; 307. Heating network heater; 308. Steam-water heat exchanger; 4. Main transformer; 5. Heat user pipeline; 6. Steam user pipeline; 7. Low-voltage equipment. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] The utility model provides Figure 1A heat energy recovery device of a thermoelectric system shown in the figure comprises a boiler body 1, a steam turbine 2 is arranged on the side of the boiler body 1, a generator 3 is arranged on the side of the steam turbine 2, a recovery component for heat energy recovery is arranged on the side of the generator 3, and the recovery component comprises a main transformer 4, a double-winding transformer 301 is arranged on the outer wall of the main transformer 4, and a 10kv busbar 302 is arranged at the connection between the main transformer 4 and the generator 3 and the double-winding transformer 301.

[0018] Specifically, a steam boiler 304 for providing steam is disposed on one side of the outer wall of the 10kv busbar 302 , and a hot water boiler 305 for providing hot water is disposed on the other side of the outer wall of the 10kv busbar 302 .

[0019] It should be noted that when the power demand of the power grid is low, the power generated by the generator 3 is sent to the electrode boiler system through the connected transformer, and the hot water boiler 305 can directly consume electricity to heat the heat network heater 307, and the heated water is sent back to the heat network through the heat user pipeline 5 for use by urban users.

[0020] The steam boiler 304 can generate high-pressure steam for steam users. At the same time, when the demand for urban heating is large, the steam boiler 304 can heat the hot network water through the steam-water heat exchanger 308. The generated high-pressure steam is passed through the steam pipe 306 and the steam user pipe 6 for urban users.

[0021] Specifically, a steam pipe 306 for conveying steam is disposed at the bottom of the steam boiler 304 , and a hot water user pipe 5 for providing hot water to users is disposed at the bottom of the hot water boiler 305 .

[0022] Furthermore, a plant transformer load device 303 is provided on the outer wall of the double-winding transformer 301 .

[0023] It should be noted that the design of the factory transformer load equipment 303 is to provide the factory with a stable and reliable power supply, balance the power load, improve the efficiency of power utilization, save energy, and ensure the normal operation of equipment and machines to ensure the smooth progress of industrial production.

[0024] Furthermore, a heat network heater 307 for heating heat network water is provided at the bottom of the steam boiler 304 and at the side of the steam pipe 306 , and a steam-water heat exchanger 308 is provided at the side of the heat user pipe 5 and at the bottom of the heat network heater 307 .

[0025] It should be noted that the heat network heater 307 is a device used in a centralized heating system, which is mainly used to transfer the thermal energy of hot water to the target medium to provide heat and hot water supply. The main function of the steam-water heat exchanger 308 is to exchange heat between high-temperature and high-pressure steam and cooling water or other media to achieve energy transfer and recovery.

[0026] Furthermore, a steam user pipeline 6 for providing high-pressure steam to users is provided at the bottom of the steam pipeline 306 .

[0027] Furthermore, the plant transformer load device 303 is internally provided with a low-voltage device 7 for assisting the operation of the thermal power system.

[0028] In actual use, the generator 3 is connected to the 10kv bus 302 of the main transformer 4. A section of closed bus is set up, equipped with corresponding protection devices and measuring devices. The bus is connected to a new double-winding transformer 301. The high-voltage side is a triangle connection, and the low-voltage side winding is a star connection. The neutral point of the star connection side winding passes through the resistor side and is equipped with a mutual inductor for measurement and protection. The low-voltage side outgoing line is connected to the 10kv bus 302 of the power distribution system. This section is equipped with a low-voltage side bus trolley switch, zinc oxide lightning arrester, protection device and measuring device. The 10kv bus 302 is connected to the electrode boiler main equipment and auxiliary equipment. The main equipment is a 60MW steam boiler 304 and a 50MW hot water boiler 305. The auxiliary equipment is lighting, low-voltage equipment 7, etc. When the power demand of the power grid is low, the power generated by the generator 3 is sent to the electrode boiler system through the connected transformer, the hot water boiler 305 can directly consume electricity to heat the heating network heater 307, and send the heated water back to the heating network for use by urban users, and the steam boiler 304 can generate high-pressure steam for steam users. At the same time, when the demand for urban heating is large, the steam boiler 304 can heat the heating network water for use by urban users through the steam-water heat exchanger 308. Through the construction of the above system, it can be applied to the power grid system with unstable voltage.

[0029] For the electrode boiler system, the efficiency is as high as over 99%, the volume is small, and it saves space. It can use 10kv high-voltage electricity for direct supply, reducing the initial investment in the transformer. It can adjust the peak-to-valley difference of the power grid, reduce the daytime load of the power grid, and make full use of the low-peak electricity of the power grid at night.

[0030] The utility model has a simple structure and is easy to use. It uses a new transformer to quickly reduce the load, and uses excess electricity to heat water to provide free energy heat dissipation, which greatly improves the efficiency of new energy utilization, avoids wind and solar power abandonment problems, and ensures safe and stable operation of the power grid. It obtains deep peak regulation benefits and increases the power grid's new energy consumption.

[0031] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A heat energy recovery device for a thermoelectric system, comprising a boiler body (1), a steam turbine (2) being arranged on the side of the boiler body (1), and a generator (3) being arranged on the side of the steam turbine (2), characterized in that: A recovery component for recovering heat energy is arranged on the side of the generator (3), the recovery component comprising a main transformer (4), a double-winding transformer (301) is arranged on the outer wall of the main transformer (4), and a 10kv busbar (302) is arranged at the connection between the main transformer (4) and the generator (3) and the double-winding transformer (301).

2. A heat energy recovery device for a thermoelectric system according to claim 1, characterized in that: A steam boiler (304) for providing steam is disposed on one side of the outer wall of the 10kv busbar (302), and a hot water boiler (305) for providing hot water is disposed on the other side of the outer wall of the 10kv busbar (302).

3. The heat energy recovery device of a thermoelectric system according to claim 2, characterized in that: A steam pipe (306) for conveying steam is provided at the bottom of the steam boiler (304), and a hot water user pipe (5) for providing hot water to users is provided at the bottom of the hot water boiler (305).

4. The heat energy recovery device of a thermoelectric system according to claim 1, characterized in that: A plant transformer load device (303) is provided on the outer wall of the double-winding transformer (301).

5. The heat energy recovery device of a thermoelectric system according to claim 3, characterized in that: A heat network heater (307) for heating heat network water is provided at the bottom of the steam boiler (304) and on the side of the steam pipe (306), and a steam-water heat exchanger (308) is provided on the side of the heat user pipe (5) and on the bottom of the heat network heater (307).

6. The heat energy recovery device of a thermoelectric system according to claim 2, characterized in that: A steam user pipeline (6) for providing high-pressure steam to users is provided at the bottom of the steam pipeline (306).

7. The heat energy recovery device of a thermoelectric system according to claim 4, characterized in that: The plant transformer load device (303) is internally provided with a low-voltage device (7) for assisting the operation of the thermal power system.

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