Energy-saving and environment-friendly flue gas waste heat recovery boiler

Abstract

The utility model relates to an energy-saving and environment-friendly flue gas waste heat recovery boiler, which comprises a boiler assembly and a smoke exhaust pipe, the smoke exhaust pipe is connected and arranged at a flue gas outlet of the boiler assembly, the energy-saving and environment-friendly flue gas waste heat recovery boiler is characterized by further comprising a heat exchange assembly and an energy exchange assembly, the smoke exhaust pipe is connected with the lower end of the heat exchange assembly, and the energy exchange assembly is connected with the heat exchange assembly. The heat exchange assembly is arranged on the top of the flue gas inlet, so that output flue gas is guided into the heat exchange assembly for heat exchange, a steam exhaust port is formed in the top of the heat exchange assembly and communicates with the input end of the transduction assembly, the transduction assembly comprises a base, a rotating shaft and an impeller disc, and the rotating shaft is rotatably installed in an inner cavity of the base. According to the utility model, through the matching arrangement of the heat exchange assembly and the energy conversion assembly, the heat exchange assembly can be used for heat exchange before the flue gas exhausted in the boiler use process is purified, and the energy conversion assembly is used for converting heat energy into mechanical energy, so that the waste heat of the high-temperature flue gas can be conveniently recycled.

Description

Technical Field

[0001] The utility model relates to the technical field of boilers, in particular to an energy-saving and environmentally friendly flue gas waste heat recovery boiler. Background Art

[0002] A boiler is an energy conversion device. The energy input to the boiler includes chemical energy and electrical energy in the fuel. The boiler outputs steam, high-temperature water or organic heat carrier with a certain amount of thermal energy. The original meaning of pot refers to a water container heated on fire, and furnace refers to a place where fuel is burned. The boiler consists of two parts: the pot and the furnace. The hot water or steam generated in the boiler can directly provide the required thermal energy for industrial production and people's lives, or it can be converted into mechanical energy through a steam power device, or the mechanical energy can be converted into electrical energy through a generator.

[0003] However, when existing boilers heat raw materials, a large amount of flue gas generated by the combustion of fuel inside is discharged to the outside, which not only wastes resources but also pollutes the environment. Although some filtering equipment and purification equipment are used to filter the exhaust gas under the existing technology, there is still a problem of heat loss when the boiler flue gas is discharged after purification. Utility Model Content

[0004] 1. Technical issues to be solved

[0005] The utility model provides an energy-saving and environment-friendly flue gas waste heat recovery boiler, which solves the problem that heat loss still exists in the discharge of boiler flue gas after purification.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: an energy-saving and environmentally friendly flue gas waste heat recovery boiler, comprising a boiler assembly and an exhaust pipe, the exhaust pipe being connected and arranged at the flue gas outlet of the boiler assembly, characterized in that it also comprises a heat exchange component and an energy conversion component, the exhaust pipe being connected to the lower end of the heat exchange component so that the output flue gas is introduced into the heat exchange component for heat exchange, a steam outlet is provided at the top of the heat exchange component, and the steam outlet is connected to the input end of the energy conversion component, the energy conversion component comprises a base, a rotating shaft and an impeller disk, the rotating shaft is rotatably installed in the inner cavity of the base, the impeller disk is fixedly connected to the outer wall of the rotating shaft, and a plurality of blades uniformly arranged along its radial direction are formed on the impeller disk, and the input end of the energy conversion component is formed on the base and faces adjacent blades.

[0008] Preferably, the base includes a hood and a steam inlet pipe, the inner diameter of the hood is adapted to the diameter of the impeller disk, the steam inlet pipe is fixedly connected to the top of the outer wall of the hood along the tangential direction of the hood, and the inner cavity of the steam inlet pipe is communicated with the inner cavity of the hood, and the end of the steam inlet pipe facing away from the hood is connected to the steam exhaust port of the heat exchange assembly.

[0009] It is further preferred that openings are formed on two opposite sides of the hood, and a first cover plate and a second cover plate are respectively sealed and connected at the openings on both sides of the hood, the first cover plate and the second cover plate respectively cover the openings on both sides of the hood, one end of the rotating shaft passes through the second cover plate, and the other end of the rotating shaft is connected to the first cover plate by a bearing.

[0010] In a further embodiment, a flow guide pipe is fixedly connected to a surface of the first cover plate facing away from the inner cavity of the hood, and the flow guide pipe is in communication with the inner cavity of the hood.

[0011] It is further preferred that the heat exchange assembly includes an outer shell, a flue gas outlet pipe, a water inlet pipe, a diverter plate, a plurality of heat exchange tubes, an evaporating plate and a steam outlet seat, the diverter plate is fixed to the inner bottom of the outer shell, and the side of the diverter plate is connected to one end of the water inlet pipe, the other end of the water inlet pipe passes through the outside of the outer shell and is connected to an external water pump, the plurality of heat exchange tubes are fixed to the top of the diverter plate and are connected to the inner cavity of the diverter plate, the top ends of the plurality of heat exchange tubes all pass through the evaporating plate and are fixedly connected thereto, the evaporating plate extends into the inner side of the steam outlet seat and is fixedly connected thereto, the steam outlet seat is installed and fixed on the top of the outer shell, and a steam outlet is formed on the top of the steam outlet seat, and the flue gas outlet pipe is connected and arranged at the upper end of the outer shell.

[0012] In a further preferred embodiment, the heat exchange tube is configured as a heat-conducting metal tube, and both ends of the heat exchange tube are connected.

[0013] (III) Beneficial effects

[0014] Compared with the prior art, the utility model provides an energy-saving and environmentally friendly flue gas waste heat recovery boiler, which has the following beneficial effects:

[0015] In the utility model, by coordinating the heat exchange component and the energy conversion component, the flue gas exhausted during the use of the boiler can first be heat exchanged by the heat exchange component before being purified, and the energy conversion component can be used to convert the thermal energy into mechanical energy, thereby facilitating the recovery and utilization of the waste heat of the high-temperature flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an energy-saving and environmentally friendly flue gas waste heat recovery boiler according to the implementation plan;

[0017] Figure 2 is a schematic structural diagram of a heat exchange assembly according to an implementation scheme;

[0018] Figure 3 for Figure 3 Schematic diagram of the exploded structure of the heat exchange component;

[0019] Figure 4 is a schematic structural diagram of a transducer assembly according to an embodiment;

[0020] Figure 5 for Figure 4 Schematic diagram of the decomposed structure of the transducer component.

[0021] In the figure: 10, boiler assembly; 20, smoke exhaust pipe; 30, heat exchange component; 31, outer shell; 32, smoke outlet pipe; 33, water inlet pipe; 34, diverter plate; 35, heat exchange tube; 36, evaporator plate; 37, steam outlet seat; 40, energy conversion component; 41, hood; 42, first cover plate; 43, second cover plate; 44, rotating shaft; 45, impeller plate; 46, steam input pipe; 47, guide pipe. DETAILED DESCRIPTION

[0022] 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.

[0023] See also Figure 1 , an energy-saving and environmentally friendly flue gas waste heat recovery boiler, may include a boiler assembly 10, a smoke exhaust pipe 20, a heat exchange component 30 and an energy conversion component 40. The smoke exhaust pipe 20 is connected to the smoke exhaust port of the boiler assembly 10, and the smoke exhaust pipe 20 is connected to the lower end of the heat exchange component 30, so that the smoke output from the boiler assembly 10 can be introduced into the heat exchange component 30 for heat exchange. A steam exhaust port is provided at the top of the heat exchange component 30, and the steam exhaust port is connected to the input end of the energy conversion component 40, so that hot steam can be sprayed into the energy conversion component 40 to convert thermal energy into mechanical energy.

[0024] See also Figure 2 and Figure 3The heat exchange assembly 30 includes an outer shell 31, a smoke outlet pipe 32, a water inlet pipe 33, a diverter plate 34, a plurality of heat exchange tubes 35, an evaporation plate 36, and a steam outlet seat 37. The diverter plate 34 is fixed to the inner bottom of the outer shell 31, and the side of the diverter plate 34 is connected to one end of the water inlet pipe 33, and the other end of the water inlet pipe 33 passes through the outer shell 31 and is connected to an external water pump. A plurality of heat exchange tubes 35 are fixed to the top of the diverter plate 34 and are connected to the inner cavity of the diverter plate 34, so that water can be input into the heat exchange tubes 35, and the liquid level in the heat exchange tubes 35 needs to be kept lower than the height of the heat exchange tubes 35 to avoid water overflow. The top ends of the plurality of heat exchange tubes 35 all penetrate the evaporation plate 36 and are fixedly connected thereto. The evaporation plate 36 extends into the inner side of the steam outlet seat 37 and is fixedly connected thereto. The steam outlet seat 37 is fixedly mounted on the top of the outer shell 31, and a steam outlet is formed on the top of the steam outlet seat 37. The heat exchange tube 35 is configured as a heat-conducting metal tube, and both ends of the heat exchange tube 35 are connected, so that the water in the heat exchange tube 35 can evaporate after the heat exchange tube 35 contacts the high-temperature flue gas, and the water vapor is discharged from the steam outlet of the steam outlet seat 37. The flue gas outlet pipe 32 is connected and arranged at the upper end of the outer shell 31, and the flue gas after heat exchange can be discharged from the flue gas outlet pipe 32.

[0025] See also Figure 4 and Figure 5 The energy conversion component 40 includes a base, a rotating shaft 44 and an impeller disk 45. The rotating shaft 44 is rotatably installed in the inner cavity of the base, the impeller disk 45 is fixedly connected to the outer wall of the rotating shaft 44, and the impeller disk 45 is formed with multiple sections of blades evenly arranged along its radial direction. The input end of the energy conversion component 40 is formed on the base and faces the adjacent blades. The water vapor input from the input end can push the blades and rotate the rotating shaft 44. The rotating shaft 44 can be connected to an external generator, and then the thermal energy is converted into mechanical energy, and then the mechanical energy is converted into electrical energy for storage or use.

[0026] In this embodiment, the base may include a hood 41, a first cover plate 42, a second cover plate 43, a steam input pipe 46, and a guide pipe 47. The inner diameter of the hood 41 is adapted to the diameter of the impeller disk 45, and the impeller disk 45 is covered therein. The first cover plate 42 and the second cover plate 43 are respectively sealed and connected to the openings on both sides of the hood 41, and the first cover plate 42 and the second cover plate 43 cover the openings on both sides of the hood 41 respectively. The steam input pipe 46 is fixedly connected to the top of the outer wall of the hood 41 along the tangential direction of the hood 41, and the inner cavity of the steam input pipe 46 is communicated with the inner cavity of the hood 41, and the end of the steam input pipe 46 facing away from the hood 41 is connected to the steam outlet of the heat exchange assembly 30, so that water vapor can be input into the hood 41 from the steam input pipe 46. A guide pipe 47 is fixedly connected to the surface of the first cover plate 42 facing away from the inner cavity of the hood 41. The guide pipe 47 is in communication with the inner cavity of the hood 41. After the water vapor is cooled in the hood 41 and converted into water, it can overflow and be discharged from the guide pipe 47, and the discharged water can be circulated and input into the heat exchange component 30. One end of the rotating shaft 44 passes through the second cover plate 43, and the other end of the rotating shaft 44 is connected to the first cover plate 42 by a bearing, so that the bearing can support the rotation of the rotating shaft 44.

[0027] In all the schemes mentioned above, the connection between two parts can be selected according to actual conditions by welding, bolt and nut matching connection, bolt or screw connection or other well-known connection methods, which are not described one by one here. In the above, all fixed connections are preferably welded. Although the embodiments of the utility model have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. An energy-saving and environmentally friendly flue gas waste heat recovery boiler, comprising a boiler assembly (10) and a smoke exhaust pipe (20), wherein the smoke exhaust pipe (20) is connected to the smoke exhaust port of the boiler assembly (10), and is characterized in that: It also comprises a heat exchange component (30) and an energy conversion component (40), wherein the smoke exhaust pipe (20) is connected to the lower end of the heat exchange component (30) so that the output smoke is introduced into the heat exchange component (30) for heat exchange, and a steam exhaust port is provided at the top of the heat exchange component (30), and the steam exhaust port is communicated with the input end of the energy conversion component (40). The energy conversion component (40) comprises a base, a rotating shaft (44) and an impeller disc (45); the rotating shaft (44) is rotatably mounted in an inner cavity of the base; the impeller disc (45) is fixedly connected to an outer wall of the rotating shaft (44); and the impeller disc (45) is formed with a plurality of blades evenly arranged along its radial direction; and the input end of the energy conversion component (40) is formed on the base and faces an adjacent blade.

2. The energy-saving and environmentally friendly flue gas waste heat recovery boiler according to claim 1 is characterized in that: The base comprises a hood (41) and a steam input pipe (46); the inner diameter of the hood (41) is matched with the diameter of the impeller disk (45); the steam input pipe (46) is fixedly connected to the top of the outer wall of the hood (41) along the tangential direction of the hood (41); the inner cavity of the steam input pipe (46) is communicated with the inner cavity of the hood (41); and the end of the steam input pipe (46) facing away from the hood (41) is connected to the steam exhaust port of the heat exchange component (30).

3. The energy-saving and environmentally friendly flue gas waste heat recovery boiler according to claim 2 is characterized in that: The hood (41) is formed with openings on opposite sides, and the openings on both sides of the hood (41) are respectively sealed with a first cover plate (42) and a second cover plate (43), the first cover plate (42) and the second cover plate (43) respectively cover the openings on both sides of the hood (41), one end of the rotating shaft (44) passes through the second cover plate (43), and the other end of the rotating shaft (44) is connected to the first cover plate (42) by a bearing.

4. The energy-saving and environmentally friendly flue gas waste heat recovery boiler according to claim 3 is characterized in that: A flow guide pipe (47) is fixedly connected to a surface of the first cover plate (42) that faces away from the inner cavity of the hood (41), and the flow guide pipe (47) is in communication with the inner cavity of the hood (41).

5. The energy-saving and environmentally friendly flue gas waste heat recovery boiler according to claim 1 is characterized in that: The heat exchange assembly (30) comprises an outer shell (31), a smoke outlet pipe (32), a water inlet pipe (33), a flow distribution plate (34), a plurality of heat exchange pipes (35), an evaporation plate (36) and a steam outlet seat (37), wherein the flow distribution plate (34) is fixed to the inner bottom of the outer shell (31), and the side of the flow distribution plate (34) is connected to one end of the water inlet pipe (33), and the other end of the water inlet pipe (33) passes through the outer shell (31) and is connected to an external water pump. ) is fixed on the top of the diverter disk (34) and is connected to the inner cavity of the diverter disk (34), the top ends of the plurality of heat exchange tubes (35) all pass through the evaporator disk (36) and are fixedly connected thereto, the evaporator disk (36) extends into the inner side of the steam outlet seat (37) and is fixedly connected thereto, the steam outlet seat (37) is installed and fixed on the top of the outer shell (31), and a steam outlet is formed on the top of the steam outlet seat (37), and the smoke outlet pipe (32) is connected and arranged at the upper end of the outer shell (31).

6. The energy-saving and environmentally friendly flue gas waste heat recovery boiler according to claim 5 is characterized in that: The heat exchange tube (35) is configured as a heat-conducting metal tube, and both ends of the heat exchange tube (35) are connected.

Images