Power plant heat energy recovery device

Abstract

The utility model discloses a power plant heat energy recovery device which comprises a protection box body, a dust removal mechanism is arranged on the top of the protection box body, an air inlet pipe penetrates through one end of the protection box body, a water outlet pipe penetrates through the other end of the protection box body, and a heat energy absorption mechanism is arranged in the protection box body and connected with the air inlet pipe and the water outlet pipe. According to the heat energy recovery device for the power plant, the problem that heat in flue gas cannot be fully absorbed due to the fact that the contact area between a heat absorption component and the flue gas is small in the existing heat energy recovery technology is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat energy recovery equipment, and in particular relates to a heat energy recovery device for a power plant. Background Art

[0002] A power plant is a power plant that converts some form of raw energy into electrical energy for fixed facilities or transportation, such as thermal, hydroelectric, steam, diesel or nuclear power plants. Since power plants produce a large amount of flue gas that carries a large amount of heat energy, it is necessary to collect and utilize the heat energy generated in the industrial process and convert it into other useful forms to improve energy utilization efficiency and reduce energy waste.

[0003] The Chinese utility model patent with publication date of April 8, 2022 and publication number CN216245770U: A waste heat recovery device for thermal power engineering of a power plant, including a thermal frame, with an air inlet pipe and an air outlet pipe connected to the left and right ends of the thermal frame, a water storage tank at the upper end of the thermal frame, and an inlet pipe and an outlet pipe connected to the left and right ends of the water storage tank, a guide block arranged in an inverted cone shape is fixed to the upper end of the inner cavity of the water storage tank, a collecting cup matching the position of the guide block is provided in the water storage tank, the right end of the collecting cup is connected to the left end of the outlet pipe, a movable valve is provided in the water inlet pipe, a buoy is provided on the left side of the inner cavity of the water storage tank, and the movable valve and the buoy are connected and fixed by a connecting rope. The utility model distills the wastewater of the power plant through the waste gas containing a large amount of heat generated by the thermal operation of the power plant, thereby improving the thermal utilization efficiency and facilitating the treatment of the wastewater of the power plant;

[0004] This application can improve the efficiency of thermal utilization and facilitate the treatment of power plant wastewater. However, when recycling the flue gas heat energy, the contact area between the heat absorbing component and the flue gas is small, resulting in the heat in the flue gas not being fully absorbed. Once the high-temperature flue gas is discharged to the outside, it will cause multiple pollution to the environment. Utility Model Content

[0005] The utility model aims to provide a heat recovery device for a power plant, which solves the problem in the existing heat recovery technology that the contact area between the heat absorbing component and the flue gas is small, resulting in that the heat in the flue gas cannot be fully absorbed.

[0006] The technical solution adopted by the utility model is that the heat energy recovery device of the power plant includes a protective box body, a dust removal mechanism is arranged on the top of the protective box body, an air inlet pipe is penetrated through one end of the protective box body, a water outlet pipe is penetrated through the other end of the protective box body, a heat energy absorption mechanism is arranged inside the protective box body, and the heat energy absorption mechanism is respectively connected to the air inlet pipe and the water outlet pipe.

[0007] The utility model is also characterized in that:

[0008] The heat energy absorption mechanism includes a flue gas pipe, one end of which is fixedly connected to the air inlet pipe, the other end of which is fixedly connected to a transmission pipe, the transmission pipe is connected to the dust removal mechanism, a guide pipe is provided on the outside of the flue gas pipe, one end of which is fixedly connected to the water outlet pipe, the other end of which is fixedly connected to a water inlet pipe, the water inlet pipe is arranged through the protective box, a heat absorption layer is provided between the flue gas pipe and the guide pipe, an additional pipe is provided on the outside of the guide pipe, one end of which is fixedly connected to a connecting pipe, the connecting pipe is connected to the dust removal mechanism, the other end of the additional pipe is connected to the transmission pipe, and a heat conductive layer is provided between the guide pipe and the additional pipe.

[0009] The dust removal mechanism includes a dust removal box, an air outlet pipe is provided on the top of the dust removal box, a temperature sensor is provided inside the dust removal box, a connecting frame is provided below the temperature sensor, a dust removal bag is provided inside the connecting frame, a connecting pipe is provided at one end of the dust removal box, the connecting pipe passes through the protective box and is connected with the connecting pipe, a connecting transmission pipe is passed through the other end of the dust removal box, an inspection panel is provided on one side of the surface of the dust removal box, and a control panel is provided on one side of the surface of the dust removal box.

[0010] An electric valve is provided at the connection between the connecting pipe and the dust removal box.

[0011] A one-way valve is provided at the connection point between the connecting pipe and the communicating pipe, and a one-way valve is provided at the connection point between the additional pipe and the transmission pipe.

[0012] The water inlet pipe, the water outlet pipe, the air inlet pipe and the air outlet pipe are all provided with valves outside the protective box.

[0013] The beneficial effects of the utility model are:

[0014] The heat recovery device for a power plant provided by the utility model is wound around the outer side of the flue gas pipe by a guide pipe, so that the heat of the flue gas is transferred to the guide pipe with the cooperation of the heat absorption layer, so that the water in the guide pipe is evenly heated. At the same time, during the process of the flue gas being discharged, the temperature sensor will always detect the temperature of the exhaust gas. Once the temperature is too high, the flue gas will be re-introduced into the additional pipe under the guidance of the connecting pipe, and the heat of the flue gas will be transferred to the guide pipe again with the cooperation of the heat conduction layer. Not only can the water in the guide pipe be heated again to avoid heat waste, but also the high-temperature flue gas can be prevented from causing various pollutions to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model power plant heat energy recovery device;

[0016] Figure 2 It is a cross-sectional view of the utility model power plant heat recovery device;

[0017] Figure 3 It is a schematic diagram of the connection of the flue gas pipe of the heat recovery device of the power plant of the utility model.

[0018] In the figure, 1. protective box, 2. air inlet pipe, 3. water outlet pipe, 4. flue gas pipe, 5. guide pipe, 6. heat absorption layer, 7. additional pipe, 8. heat conduction layer, 9. water inlet pipe, 10. transmission pipe, 11. connecting pipe, 12. dust removal box, 13. air outlet pipe, 14. temperature sensor, 15. connecting frame, 16. dust removal bag, 17. connecting pipe, 18. inspection panel, 19. control panel, 20. electric valve. DETAILED DESCRIPTION

[0019] The utility model is described in detail below with reference to the accompanying drawings and specific implementation modes.

[0020] The utility model provides a heat recovery device for a power plant, such as Figure 1 As shown, it includes a protective box 1, a dust removal mechanism is provided on the top of the protective box 1, an air inlet pipe 2 is passed through one end of the protective box 1, a water outlet pipe 3 is passed through the other end of the protective box 1, and a heat energy absorption mechanism is provided inside the protective box 1, which is connected to the air inlet pipe 2 and the water outlet pipe 3 respectively. Figure 2-3As shown, the heat energy absorption mechanism includes a flue gas pipe 4, one end of the flue gas pipe 4 is fixedly connected to the air inlet pipe 2, the other end of the flue gas pipe 4 is fixedly connected to a transmission pipe 10, the transmission pipe 10 is connected to the dust removal mechanism, a guide pipe 5 is arranged on the outside of the flue gas pipe 4, one end of the guide pipe 5 is fixedly connected to the water outlet pipe 3, the other end of the guide pipe 5 is fixedly connected to a water inlet pipe 9, the water inlet pipe 9 is arranged through the protection box 1, a heat absorption layer 6 is arranged between the flue gas pipe 4 and the guide pipe 5, an additional pipe 7 is arranged on the outside of the guide pipe 5, one end of the additional pipe 7 is fixedly connected to a connecting pipe 11, the connecting pipe 11 is connected to the dust removal mechanism, and the additional pipe 7 is fixedly connected to the connecting pipe 11. The other end of the additional pipe 7 is connected to the transmission pipe 10. A heat-conducting layer 8 is provided between the guide pipe 5 and the additional pipe 7. The flue gas is introduced into the flue gas pipe 4 through the air inlet pipe 2. The heat carried by the flue gas heats the water in the guide pipe 5 through the heat-absorbing layer 6. The guide pipe 5 is wound around the outside of the flue gas pipe 4. The water flow inside the guide pipe 5 circulates outside the guide pipe 5, which can make the water in the guide pipe 5 heated more evenly, thereby realizing the function of heat recovery and reuse of the flue gas. The dust removal mechanism includes a dust removal box 12. An air outlet pipe is provided on the top of the dust removal box 12. 13, a temperature sensor 14 is provided inside the dust removal box 12, a connecting frame 15 is provided below the temperature sensor 14, a dust bag 16 is sleeved inside the connecting frame 15, a connecting pipe 17 is penetrated at one end of the dust removal box 12, the connecting pipe 17 penetrates the protective box 1 and is connected with the connecting pipe 11, and the other end of the dust removal box 12 penetrates the connecting transmission pipe 10, an inspection plate 18 is provided on one side of the surface of the dust removal box 12, and a control panel 19 is provided on one side of the surface of the dust removal box 12; an electric valve 20 is provided at the connection between the connecting pipe 17 and the dust removal box 12; the connecting pipe 11 and the connecting pipe 11 are connected to the connecting pipe 11. A one-way valve is provided at the connection of the through pipe 17, and the one-way valve is used to prevent the smoke backflow between the connecting pipe 11 and the connecting pipe 17. A one-way valve is provided at the connection between the additional pipe 7 and the transmission pipe 10; the water inlet pipe 9, the water outlet pipe 3, the air inlet pipe 2 and the air outlet pipe 13 are all provided with valves outside the protective box 1, and the water inlet and outlet and the air inlet and outlet between the water inlet pipe 9, the water outlet pipe 3, the air inlet pipe 2 and the air outlet pipe 13 are controlled by each valve; through the connection between the connecting pipe 17, the connecting pipe 11, the additional pipe 7 and the transmission pipe 10, the effect of recycling and utilizing the smoke heat energy is achieved.

[0021] The heat recovery device for a power plant provided by the utility model has the following working principle: firstly, the device is electrically connected to an external power source to ensure the normal use of the device; the flue gas generated by the power plant will enter the flue gas pipe 4 through the air inlet pipe 2; the heat carried by the flue gas will heat the water in the guide pipe 5 through the heat absorption layer 6; the guide pipe 5 is wound around the outside of the flue gas pipe 4, so that the water in the guide pipe 5 can be heated more evenly, thereby realizing the effect of heat recovery and reuse of the flue gas; after the heat of the flue gas is absorbed, it will enter the dust removal box 12 through the transmission pipe 10; in the process of extracting the flue gas, the temperature sensor 14 will always detect the temperature of the outlet gas; once the temperature is too high, the electric valve will be closed The door 20 is opened, so that the high-temperature flue gas is guided by the connecting pipe 11 and then introduced into the additional pipe 7 again. The additional pipe 7 is also wound around the outside of the guide pipe 5. The high-temperature hot air in the additional pipe 7 will transfer the heat of the flue gas to the guide pipe 5 again under the heat conduction of the heat conductive layer 8, so as to fully recycle the heat in the flue gas. It can not only heat the water in the guide pipe 5 again to avoid heat waste, but also prevent the high-temperature flue gas from causing various pollution to the environment. When the flue gas loses heat, the flue gas will be filtered through the dust removal bag 16, and then discharged into the air from the outlet pipe 13, while the hot water will be exported through the water outlet pipe 3 for subsequent use.

[0022] Example 1

[0023] The power plant heat recovery device proposed in this embodiment is as follows: Figure 1 As shown, it includes a protective box body 1, a dust removal mechanism is provided on the top of the protective box body 1, an air inlet pipe 2 is penetrated at one end of the protective box body 1, a water outlet pipe 3 is penetrated at the other end of the protective box body 1, and a heat energy absorption mechanism is provided inside the protective box body 1, and the heat energy absorption mechanism is respectively connected to the air inlet pipe 2 and the water outlet pipe 3.

[0024] Example 2

[0025] The power plant heat recovery device proposed in this embodiment is as follows: Figure 1 As shown, it includes a protective box 1, a dust removal mechanism is provided on the top of the protective box 1, an air inlet pipe 2 is passed through one end of the protective box 1, a water outlet pipe 3 is passed through the other end of the protective box 1, and a heat energy absorption mechanism is provided inside the protective box 1, which is connected to the air inlet pipe 2 and the water outlet pipe 3 respectively. Figure 2-3As shown, the heat energy absorption mechanism includes a flue gas pipe 4, one end of which is fixedly connected to the air inlet pipe 2, and the other end of the flue gas pipe 4 is fixedly connected to a transmission pipe 10, which is connected to the dust removal mechanism. A guide pipe 5 is provided on the outside of the flue gas pipe 4, one end of the guide pipe 5 is fixedly connected to the water outlet pipe 3, and the other end of the guide pipe 5 is fixedly connected to a water inlet pipe 9, which is arranged through the protective box 1, a heat absorption layer 6 is provided between the flue gas pipe 4 and the guide pipe 5, an additional pipe 7 is provided on the outside of the guide pipe 5, one end of the additional pipe 7 is fixedly connected to a connecting pipe 11, which is connected to the dust removal mechanism, the other end of the additional pipe 7 is connected to the transmission pipe 10, and a heat conductive layer 8 is provided between the guide pipe 5 and the additional pipe 7.

[0026] Example 3

[0027] The power plant heat recovery device proposed in this embodiment is as follows: Figure 1 As shown, it includes a protective box 1, a dust removal mechanism is provided on the top of the protective box 1, an air inlet pipe 2 is passed through one end of the protective box 1, a water outlet pipe 3 is passed through the other end of the protective box 1, and a heat energy absorption mechanism is provided inside the protective box 1, which is connected to the air inlet pipe 2 and the water outlet pipe 3 respectively. Figure 2-3 As shown, the heat energy absorption mechanism includes a flue gas pipe 4, one end of the flue gas pipe 4 is fixedly connected to the air inlet pipe 2, the other end of the flue gas pipe 4 is fixedly connected to a transmission pipe 10, the transmission pipe 10 is connected to the dust removal mechanism, a guide pipe 5 is arranged on the outside of the flue gas pipe 4, one end of the guide pipe 5 is fixedly connected to the water outlet pipe 3, the other end of the guide pipe 5 is fixedly connected to a water inlet pipe 9, the water inlet pipe 9 is arranged through the protection box 1, a heat absorption layer 6 is arranged between the flue gas pipe 4 and the guide pipe 5, an additional pipe 7 is arranged on the outside of the guide pipe 5, one end of the additional pipe 7 is fixedly connected to a connecting pipe 11, the connecting pipe 11 is connected to the dust removal mechanism, and the other end of the additional pipe 7 is connected to the transmission pipe 10 A heat-conducting layer 8 is arranged between the guide pipe 5 and the additional pipe 7; the dust removal mechanism includes a dust removal box 12, an air outlet pipe 13 is penetrated at the top of the dust removal box 12, a temperature sensor 14 is arranged inside the dust removal box 12, a connecting frame 15 is arranged below the temperature sensor 14, a dust bag 16 is sleeved inside the connecting frame 15, a connecting pipe 17 is penetrated at one end of the dust removal box 12, the connecting pipe 17 penetrates the protective box 1 and is connected with the connecting pipe 11, the other end of the dust removal box 12 penetrates the connecting transmission pipe 10, an inspection panel 18 is arranged on one side of the surface of the dust removal box 12, and a control panel 19 is arranged on one side of the surface of the dust removal box 12.

[0028] Example 4

[0029] The power plant heat recovery device proposed in this embodiment is as follows: Figure 1 As shown, it includes a protective box 1, a dust removal mechanism is provided on the top of the protective box 1, an air inlet pipe 2 is passed through one end of the protective box 1, a water outlet pipe 3 is passed through the other end of the protective box 1, and a heat energy absorption mechanism is provided inside the protective box 1, which is connected to the air inlet pipe 2 and the water outlet pipe 3 respectively. Figure 2-3As shown, the heat energy absorption mechanism includes a flue gas pipe 4, one end of which is fixedly connected to the air inlet pipe 2, and the other end of the flue gas pipe 4 is fixedly connected to a transmission pipe 10, which is communicated with the dust removal mechanism, a guide pipe 5 is arranged on the outside of the flue gas pipe 4, one end of the guide pipe 5 is fixedly connected to the water outlet pipe 3, and the other end of the guide pipe 5 is fixedly connected to a water inlet pipe 9, which is arranged through the protective box 1, a heat absorption layer 6 is arranged between the flue gas pipe 4 and the guide pipe 5, an additional pipe 7 is arranged on the outside of the guide pipe 5, one end of the additional pipe 7 is fixedly connected to a connecting pipe 11, which is communicated with the dust removal mechanism, and the other end of the additional pipe 7 is connected to the transmission pipe 10, and a heat conduction layer 8 is arranged between the guide pipe 5 and the additional pipe 7; the dust removal mechanism includes a dust removal box 12, and an air outlet pipe 13 is arranged through the top of the dust removal box 12, A temperature sensor 14 is provided inside the dust box 12, a connecting frame 15 is provided below the temperature sensor 14, a dust bag 16 is sleeved inside the connecting frame 15, a connecting pipe 17 is penetrated at one end of the dust box 12, the connecting pipe 17 penetrates the protective box 1 and is connected with the connecting pipe 11, the other end of the dust box 12 penetrates the connecting transmission pipe 10, an inspection plate 18 is provided on one side of the surface of the dust box 12, and a control panel 19 is provided on one side of the surface of the dust box 12; an electric valve 20 is provided at the connection between the connecting pipe 17 and the dust box 12; a one-way valve is provided at the connection between the connecting pipe 11 and the connecting pipe 17, and a one-way valve is provided at the connection between the additional pipe 7 and the transmission pipe 10; the water inlet pipe 9, the water outlet pipe 3, the air inlet pipe 2 and the air outlet pipe 13 are all provided with valves outside the protective box 1.

Claims

1. A heat recovery device for a power plant, characterized in that: The protective box (1) comprises a dust removal mechanism on the top of the protective box (1), an air inlet pipe (2) passing through one end of the protective box (1), a water outlet pipe (3) passing through the other end of the protective box (1), and a heat energy absorption mechanism inside the protective box (1), which is respectively connected to the air inlet pipe (2) and the water outlet pipe (3).

2. The power plant heat recovery device according to claim 1, characterized in that: The heat energy absorption mechanism comprises a flue gas pipe (4), one end of which is fixedly connected to an air inlet pipe (2), the other end of which is fixedly connected to a transmission pipe (10), the transmission pipe (10) being connected to a dust removal mechanism, a flow guide pipe (5) being arranged outside the flue gas pipe (4), one end of which is fixedly connected to a water outlet pipe (3), the other end of which is fixedly connected to a water inlet pipe (9), the water inlet pipe (9) being arranged through the protective box (1), a heat absorption layer (6) being arranged between the flue gas pipe (4) and the flow guide pipe (5), an additional pipe (7) being arranged outside the flow guide pipe (5), one end of which is fixedly connected to a connecting pipe (11), the connecting pipe (11) being connected to the dust removal mechanism, the other end of which is connected to the transmission pipe (10), and a heat conduction layer (8) being arranged between the flow guide pipe (5) and the additional pipe (7).

3. The power plant heat recovery device according to claim 2, characterized in that: The dust removal mechanism comprises a dust removal box (12), an air outlet pipe (13) is provided through the top of the dust removal box (12), a temperature sensor (14) is provided inside the dust removal box (12), a connection frame (15) is provided below the temperature sensor (14), a dust removal bag (16) is sleeved inside the connection frame (15), a connecting pipe (17) is provided through one end of the dust removal box (12), the connecting pipe (17) passes through the protective box (1) and is connected to the connecting pipe (11), the other end of the dust removal box (12) passes through the connecting transmission pipe (10), an inspection panel (18) is provided on one side of the surface of the dust removal box (12), and a control panel (19) is provided on one side of the surface of the dust removal box (12).

4. The power plant heat recovery device according to claim 3, characterized in that: An electric valve (20) is provided at the connection between the connecting pipe (17) and the dust removal box (12).

5. The power plant heat recovery device according to claim 4, characterized in that: A one-way valve is provided at the connection point between the connecting pipe (11) and the communicating pipe (17), and a one-way valve is provided at the connection point between the additional pipe (7) and the transmission pipe (10).

6. The heat recovery device for a power plant according to claim 5, characterized in that: The water inlet pipe (9), the water outlet pipe (3), the air inlet pipe (2) and the air outlet pipe (13) are all provided with valves outside the protection box (1).

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