Waste heat recycling device for tail flue gas of power plant boiler

Abstract

The utility model relates to the technical field of power plant boilers, in particular to a power plant boiler tail smoke waste heat recycling device which comprises a recycling pipeline and a sealing device, an exhaust pipe is arranged on one side of the recycling pipeline, the sealing device is arranged on one side of the recycling pipeline, the sealing device comprises a rotating ring, and the rotating ring is rotationally connected with the recycling pipeline. The side, close to the exhaust pipe, of the rotating ring is fixedly connected with a first sealing ring, one side of the exhaust pipe is fixedly connected with a threaded sleeve, the threaded sleeve is in threaded connection with the recycling pipeline, the side, close to the recycling pipeline, of the exhaust pipe is fixedly connected with a second sealing ring, and one side of the exhaust pipe is fixedly connected with a connecting rod. Heat loss is effectively reduced, the waste heat recovery efficiency is improved, energy is more fully utilized, meanwhile, external impurities can be prevented from entering a pipeline through sealing, clean and stable operation of the waste heat recovery system is kept, in addition, the influence of energy leakage on the environment can be reduced, and more energy conservation and environment protection are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of power plant boilers, in particular to a waste heat recovery and reuse device for tail flue gas of a power plant boiler. Background Art

[0002] Power station boilers, also known as "power plant boilers", refer to medium and large boilers in power plants that provide a specified amount and quality of steam to steam turbines. They are one of the main thermal equipment in thermal power plants and are often matched with steam turbine generator sets of a certain capacity. They are mainly used for power generation, but can also be used for external heat supply in some special occasions. Generally, their evaporation capacity is large, and a complete set of auxiliary equipment is required. They are mostly required to be equipped with chamber combustion furnaces and use forced ventilation. They can burn a variety of fuels such as pulverized coal, crude oil or heavy oil, blast furnace gas or coke oven gas. They have a complex structure and a high efficiency, most of which can reach about 85-93%. They have quite high requirements for operation management level, mechanization degree and automatic control technology. Power plant boilers generate a lot of waste heat during combustion, which is discharged through the exhaust pipe, resulting in heat loss and waste. Therefore, most of them use recovery pipes to recycle the waste heat.

[0003] The inventor discovered in his daily work that during the recycling process, there was a gap at the connection between the exhaust pipe and the recovery pipe, and heat was easily lost through the gap, affecting the recovery efficiency of the equipment. In order to solve the problem of heat loss due to poor sealing effect of the equipment and low recovery efficiency, the prior art uses a sealing ring for processing. However, the sealing effect of the sealing ring alone is not ideal, resulting in heat loss and affecting the recovery of waste heat. Utility Model Content

[0004] The utility model aims to solve the shortcomings of poor equipment sealing effect, heat loss and low recovery efficiency in the prior art, and proposes a waste heat recovery and reuse device for the tail flue gas of a power plant boiler.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a waste heat recovery and reuse device for the tail flue gas of a power plant boiler, comprising a recovery pipe and a sealing device, an exhaust pipe is arranged on one side of the recovery pipe, and the sealing device is arranged on one side of the recovery pipe.

[0006] Preferably, the sealing device includes a rotating ring, which is rotatably connected to the recovery pipe, and a first sealing ring is fixedly connected to one side of the rotating ring close to the exhaust pipe, and a threaded sleeve is fixedly connected to one side of the exhaust pipe, and the threaded sleeve is threadedly connected to the recovery pipe, and a second sealing ring is fixedly connected to one side of the exhaust pipe close to the recovery pipe, and a connecting rod is fixedly connected to one side of the exhaust pipe, and the surface of the connecting rod is covered with asbestos cloth. By setting up the sealing device, heat loss is effectively reduced, the efficiency of waste heat recovery is improved, and energy is more fully utilized. At the same time, the seal can prevent external impurities from entering the pipeline, and keep the waste heat recovery system clean and stable. In addition, it can also reduce the impact of energy leakage on the environment, and is more energy-saving and environmentally friendly. The second sealing ring and the first sealing ring are set, and their material is fluororubber, which has excellent high temperature resistance, can work for a long time above 200°C, and can even withstand higher temperatures for a short time. The threaded sleeve and the recovery pipe are bolted after the installation process such as the correct installation sequence, tightening torque and tightening method is executed in place, and the sealing is good.

[0007] Preferably, a magnet is fixedly connected to one side of the asbestos cloth, and a hole is opened on the surface of the magnet. By setting the magnet, the magnet can easily bind and fix the asbestos cloth when in use, thereby increasing the stability of the equipment and reducing the difficulty of operating the equipment. The asbestos cloth can effectively block the transfer of heat and has been widely used in some occasions requiring heat insulation, such as heat insulation protection of industrial equipment. The magnet is made of samarium cobalt magnet and aluminum nickel cobalt magnet, which has a higher Curie temperature and good high temperature resistance, and can maintain magnetism at higher temperatures.

[0008] Preferably, an iron rod is fixedly connected to the side of the exhaust pipe away from the connecting rod, and the magnet is magnetically connected to the iron rod. By providing the iron rod, it is convenient to fix the asbestos cloth in cooperation with the magnet, thereby increasing the sealing effect of the equipment, increasing the stability of the equipment, and facilitating use.

[0009] Preferably, a pull rod is fixedly connected to the surface of the rotating ring, and the pull rod is cylindrical. By setting the pull rod, when in use, the pull rod drives the rotating ring to rotate, which increases the stability of the equipment, reduces the difficulty of operating the equipment, and facilitates use.

[0010] Preferably, the inner wall of the recovery pipe is provided with a collecting device, and the collecting device includes a roller body, and the roller body is fixedly connected to the recovery pipe. A round roller is rotatably connected to the surface of the roller body, and a clapper is installed on the surface of the round roller. By providing the collecting device, it is convenient to drive the rapid circulation of waste heat, facilitate the rapid collection of waste heat, reduce the waste heat waste, increase the usability of the equipment, and facilitate use.

[0011] Preferably, there are three clappers, which are arranged in mirror symmetry. By setting the clappers, it is convenient to drive the air waves to circulate quickly, which increases the stability of the equipment, reduces the difficulty of operating the equipment, and is convenient to use. The material of the clappers is carbon fiber reinforced composite material. The carbon fiber itself can withstand higher temperatures in an inert atmosphere, usually reaching thousands of degrees Celsius. The air waves pass through the clappers, and the clappers drive the air waves to circulate. The three clappers can guide the air waves and reduce the excessive weight increase of the clappers, which makes the clappers unable to rotate.

[0012] Preferably, one side of the roller body passes through the recovery pipe and is fixedly connected with a round cover, and a gasket is installed on the side of the recovery pipe close to the roller body. By providing the gasket, the loss of air waves is reduced, the stability of the equipment is increased, the use is convenient, and the operation difficulty of the equipment is reduced.

[0013] Compared with the prior art, the advantages and positive effects of the utility model are:

[0014] 1. In the utility model, by setting a sealing device, when in use, the recovery pipe is threadedly fixed to the threaded sleeve, at this time, the first sealing ring and the second sealing ring are abutted, and then the asbestos cloth is pulled to wrap the first sealing ring and the second sealing ring, and then the magnet is inserted into the iron rod and fixed to the iron rod by magnetic attraction, the magnet is pulled to separate from the iron rod, and then the wrapped asbestos cloth is removed, and then the pull rod is grasped to drive the rotating ring to rotate, and the recovery pipe can be separated from the exhaust pipe. By setting a sealing device, heat loss is effectively reduced, the efficiency of waste heat recovery is improved, and energy is more fully utilized. At the same time, the seal can prevent external impurities from entering the pipeline, keep the waste heat recovery system clean and stable operation, and in addition, it can reduce the impact of energy leakage on the environment, which is more energy-saving and environmentally friendly.

[0015] 2. In the utility model, by setting a collecting device, when the waste heat air wave enters the recovery pipe, it pushes the clapper, and the clapper drives the round roller to rotate. While the round roller rotates, the clapper guides the air wave to circulate quickly. At the same time, a gasket is set to reduce heat leakage. By setting a collecting device, it is convenient to drive the waste heat to circulate quickly, to collect the waste heat quickly, to reduce the waste heat waste, to increase the usability of the equipment, and to facilitate use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model provides a three-dimensional structural schematic diagram of a waste heat recovery and reuse device for the tail flue gas of a power plant boiler;

[0017] Figure 2 The utility model provides a sealing device structure schematic diagram of a waste heat recovery and reuse device for the tail flue gas of a power plant boiler;

[0018] Figure 3The utility model proposes a waste heat recovery and reuse device for the tail flue gas of a power plant boiler. Figure 2 A schematic diagram of the enlarged structure at point A;

[0019] Figure 4 The utility model provides a side structural schematic diagram of a sealing device for a waste heat recovery and reuse device of flue gas at the tail end of a power plant boiler;

[0020] Figure 5 The utility model provides a schematic structural diagram of a collecting device for a waste heat recovery and reuse device for the tail flue gas of a power plant boiler.

[0021] Legend: 1. Recovery pipe; 2. Exhaust pipe; 3. Sealing device; 31. Rotating ring; 32. Pull rod; 33. First sealing ring; 34. Threaded sleeve; 35. Second sealing ring; 36. Connecting rod; 37. Asbestos cloth; 38. Magnet; 39. Iron rod; 4. Collecting device; 41. Round roller; 42. Clapper; 43. Roller body; 44. Round cover; 45. Gasket. DETAILED DESCRIPTION

[0022] See also Figure 1-5 The utility model provides a technical solution: a waste heat recovery and reuse device for the tail flue gas of a power plant boiler, comprising a recovery pipe 1 and a sealing device 3, an exhaust pipe 2 is arranged on one side of the recovery pipe 1, and the sealing device 3 is arranged on one side of the recovery pipe 1.

[0023] The specific configuration and function of the sealing device 3 and the collecting device 4 will be described in detail below.

[0024] In this embodiment: the sealing device 3 includes a rotating ring 31, the rotating ring 31 is rotatably connected to the recovery pipe 1, a first sealing ring 33 is fixedly connected to the side of the rotating ring 31 close to the exhaust pipe 2, a threaded sleeve 34 is fixedly connected to the side of the exhaust pipe 2, the threaded sleeve 34 is threadedly connected to the recovery pipe 1, a second sealing ring 35 is fixedly connected to the side of the exhaust pipe 2 close to the recovery pipe 1, a connecting rod 36 is fixedly connected to the side of the exhaust pipe 2, and an asbestos cloth 37 is provided on the surface of the connecting rod 36. By setting the sealing device 3, heat loss is effectively reduced and the efficiency of waste heat recovery is improved. The efficiency can make more full use of energy. At the same time, the seal can prevent foreign impurities from entering the pipeline, keep the waste heat recovery system clean and run stably. In addition, it can reduce the impact of energy leakage on the environment, and be more energy-saving and environmentally friendly. The second sealing ring 35 and the first sealing ring 33 are set. The material of the second sealing ring 35 is fluororubber, which has excellent high temperature resistance and can work for a long time at above 200°C, and can even withstand higher temperatures for a short time. The threaded sleeve 34 and the recovery pipeline 1 are bolted after the installation process such as the correct installation sequence, tightening torque and tightening method is implemented in place, and the sealing is good.

[0025] Specifically, a magnet 38 is fixedly connected to one side of the asbestos cloth 37, and a hole 1 is opened on the surface of the magnet 38. By setting the magnet 38, when in use, the magnet 38 is convenient for binding and fixing the asbestos cloth 37, thereby increasing the stability of the equipment and reducing the difficulty of operating the equipment. The asbestos cloth 37 can effectively block the transfer of heat and has been widely used in some occasions requiring heat insulation, such as heat insulation protection of industrial equipment. The magnet 38 is made of samarium cobalt magnet and aluminum nickel cobalt magnet, which has a high Curie temperature and good high temperature resistance, and can maintain magnetism at a higher temperature.

[0026] Specifically, an iron rod 39 is fixedly connected to a side of the exhaust pipe 2 away from the connecting rod 36 , and the magnet 38 is magnetically connected to the iron rod 39 .

[0027] In this embodiment, the iron rod 39 is provided to facilitate the cooperation with the magnet 38 to fix the asbestos cloth 37, thereby increasing the sealing effect of the device, increasing the stability of the device, and facilitating use.

[0028] Specifically, a pull rod 32 is fixedly connected to the surface of the rotating ring 31, and the pull rod 32 is cylindrical. By setting the pull rod 32, when in use, the pull rod 32 drives the rotating ring 31 to rotate, which increases the stability of the device, reduces the difficulty of operating the device, and facilitates use.

[0029] Specifically, the inner wall of the recovery pipe 1 is provided with a collecting device 4, which includes a roller body 43, which is fixedly connected to the recovery pipe 1, and a round roller 41 is rotatably connected to the surface of the roller body 43, and a clapper 42 is installed on the surface of the round roller 41.

[0030] In this embodiment: by setting up the collection device 4, it is convenient to promote the rapid circulation of waste heat, facilitate the rapid collection of waste heat, reduce the waste of waste heat, increase the usability of the equipment, and facilitate use.

[0031] Specifically, there are three clappers 42, which are arranged in a mirror-symmetrical manner. By setting the clappers 42, it is convenient to drive the air waves to circulate quickly, thereby increasing the stability of the equipment, reducing the difficulty of operating the equipment, and facilitating the use. The material of the clappers 42 is carbon fiber reinforced composite material. The carbon fiber itself can withstand high temperatures in an inert atmosphere, usually reaching thousands of degrees Celsius. The air waves pass through the clappers 42, and the clappers 42 drive the air waves to circulate. The three clappers 42 can guide the air waves and reduce the excessive weight increase of the clappers 42, which may cause the clappers 42 to be unable to rotate.

[0032] Specifically, one side of the roller body 43 passes through the recovery pipe 1 and is fixedly connected with a round cover 44 , and a gasket 45 is installed on one side of the recovery pipe 1 close to the roller body 43 .

[0033] In this embodiment, by providing the gasket 45, it is convenient to reduce the loss of air waves, increase the stability of the equipment, facilitate the use, and reduce the difficulty of operating the equipment.

[0034] Working principle: By setting the sealing device 3, when in use, the recovery pipe 1 is threadedly fixed to the threaded sleeve 34, at this time, the first sealing ring 33 and the second sealing ring 35 are abutted, and then the asbestos cloth 37 is pulled to wrap the first sealing ring 33 and the second sealing ring 35, and then the magnet 38 is inserted into the iron rod 39 and fixed with the iron rod 39 by magnetic attraction, and the magnet 38 is pulled to separate from the iron rod 39, and then the wrapped asbestos cloth 37 is removed, and then the pull rod 32 is grasped to drive the rotating ring 31 to rotate, and the recovery pipe 1 can be separated from the exhaust pipe 2. By setting the sealing device 3, heat loss is effectively reduced, and the efficiency of waste heat recovery is improved. Energy is more fully utilized. At the same time, the seal can prevent external impurities from entering the pipeline, keep the waste heat recovery system clean and run stably. In addition, it can reduce the impact of energy leakage on the environment, and is more energy-saving and environmentally friendly. When the waste heat air wave enters the recovery pipeline 1, it pushes the clapper 42, and the clapper 42 drives the round roller 41 to rotate. While the round roller 41 rotates, the clapper guides the air wave to circulate quickly. At the same time, a gasket 45 is set to reduce heat leakage. By setting the collection device 4, it is convenient to drive the waste heat to circulate quickly, facilitate the rapid collection of waste heat, reduce the waste of waste heat, increase the usability of the equipment, and facilitate use.

Claims

1. A waste heat recovery and reuse device for flue gas from a power plant boiler, comprising a recovery pipeline (1) and a sealing device (3), characterized in that: An exhaust pipe (2) is arranged on one side of the recovery pipe (1); the sealing device (3) is arranged on one side of the recovery pipe (1); the sealing device (3) comprises a rotating ring (31); the rotating ring (31) is rotatably connected to the recovery pipe (1); a first sealing ring (33) is fixedly connected to a side of the rotating ring (31) close to the exhaust pipe (2); a threaded sleeve (34) is fixedly connected to one side of the exhaust pipe (2); the threaded sleeve (34) is threadedly connected to the recovery pipe (1); a second sealing ring (35) is fixedly connected to a side of the exhaust pipe (2) close to the recovery pipe (1); a connecting rod (36) is fixedly connected to one side of the exhaust pipe (2); and an asbestos cloth (37) is provided on the surface of the connecting rod (36).

2. The device for recovering and reusing waste heat from tail flue gas of a power plant boiler according to claim 1, characterized in that: A magnet (38) is fixedly connected to one side of the asbestos cloth (37), and a hole 1 is formed on the surface of the magnet (38).

3. The waste heat recovery and reuse device of tail flue gas from a power plant boiler according to claim 2 is characterized in that: An iron rod (39) is fixedly connected to the side of the exhaust pipe (2) away from the connecting rod (36), and the magnet (38) is magnetically connected to the iron rod (39).

4. The device for recovering and reusing waste heat from tail flue gas of a power plant boiler according to claim 1, characterized in that: A pull rod (32) is fixedly connected to the surface of the rotating ring (31), and the pull rod (32) is arranged in a cylindrical shape.

5. The waste heat recovery and reuse device for tail flue gas of a power plant boiler according to claim 1, characterized in that: The inner wall of the recovery pipe (1) is provided with a collecting device (4), and the collecting device (4) comprises a roller body (43), and the roller body (43) is fixedly connected to the recovery pipe (1), and a round roller (41) is rotatably connected to the surface of the roller body (43), and a clapper (42) is installed on the surface of the round roller (41).

6. The device for recovering and reusing waste heat from tail flue gas of a power plant boiler according to claim 5, characterized in that: There are three clappers (42), and the three clappers (42) are arranged in a mirror-symmetrical manner.

7. The device for recovering and reusing waste heat from tail flue gas of a power plant boiler according to claim 5, characterized in that: One side of the roller body (43) passes through the recovery pipe (1) and is fixedly connected with a round cover (44); a gasket (45) is installed on the side of the recovery pipe (1) close to the roller body (43).

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