Flue gas heat energy recovery device with purification function

Abstract

The utility model discloses a flue gas heat energy recovery device with a purification function, which relates to the technical field of flue gas waste heat purification and recovery and comprises a waste heat recovery frame, a purification cylinder for extracting flue gas is assembled at the top of the waste heat recovery frame, and the waste heat recovery frame comprises a frame body fixedly connected to the bottom of the purification cylinder. A bottom plate with the middle protruding is fixed in the frame body, and L-shaped plates fixed to the front inner wall and the rear inner wall of the waste heat recovery frame are arranged on the two sets of inclined tops of the bottom plate. The flow speed of the water body is reduced through the heat exchange assembly, heat in smoke is fully transferred into the water body in cooperation with the smoke flowing in the S-shaped track in the unit space, the indirect contact area of the smoke and the water body is increased through the arrangement of the flow dividing pipe, and under the limitation of the blocking piece, the heat in the smoke is fully transferred into the water body. And the time for storing the flue gas in each group of unit space is prolonged, so that the recovery efficiency of the waste heat in the flue gas can be improved.

Description

Technical Field

[0001] This utility model relates to the field of flue gas waste heat purification and recovery technology, specifically a flue gas heat energy recovery device with purification function. Background Technology

[0002] An industrial furnace is a thermal device used in industrial production to heat materials or workpieces using the heat generated from fuel combustion or electrical energy conversion. During the combustion process in an industrial furnace, corresponding flue gas is generated. Direct emission of the flue gas will cause environmental pollution. At the same time, the flue gas temperature is relatively high, so appropriate waste heat recovery devices can be used to recover the heat in the flue gas and prevent energy loss.

[0003] A search of existing patents on the China Patent Network (Publication No.: CN 219284020 U) reveals a waste heat recovery device with flue gas purification function. This device, through the installation of purification and recovery components, ensures that the high-temperature flue gas first contacts the threaded aluminum strip and the guide pipe, heating both the guide pipe and the threaded aluminum strip. This heats the water flow between the partition and the recovery frame, which circulates through the water outlet and inlet pipes. Simultaneously, the helical cross-section of the threaded aluminum strip increases the contact time between the high-temperature flue gas and the guide pipe and threaded aluminum strip, resulting in more thorough waste heat recovery and improved waste heat recovery efficiency. This allows for simultaneous waste heat recovery and purification of the flue gas, offering convenience and practicality.

[0004] However, the above technical solution still has certain defects. Due to the fan, the flue gas flows in from the bottom of the recovery frame and flows upward. The flue gas only contacts the lower half of the outer wall of the threaded aluminum strip. The upper half of the outer wall of the threaded aluminum strip needs to be heated by the heat stored inside the recovery frame. This results in insufficient heating of the water source inside the threaded aluminum strip. Furthermore, due to the increased flow speed of the flue gas caused by the fan, less heat is transferred from the flue gas to the water source, and some heat is still lost. Therefore, a flue gas heat recovery device with purification function is proposed. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide a flue gas heat energy recovery device with purification function to solve the technical problems mentioned in the background.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a flue gas heat recovery device with purification function, including a waste heat recovery frame, a purification cylinder for extracting flue gas mounted on the top of the waste heat recovery frame, a frame body fixedly connected to the bottom of the purification cylinder, a bottom plate with a central convex shape fixed inside the frame, two sets of inclined tops of the bottom plate each having an L-plate fixed to the front and rear inner walls of the waste heat recovery frame, two sets of heat exchange components connected to the inner walls of the waste heat recovery frame mounted on the inclined surface of the bottom plate, the heat exchange components including five pairs of end pipes fixed to the front and rear inner walls of the waste heat recovery frame, each pair of end pipes having multiple diversion pipes connected to its end face, each set of diversion pipes having baffles fixed inside in a staggered arrangement, and connecting pipes alternately connecting adjacent sets of end pipes.

[0007] As a preferred technical solution, the end pipe, connecting pipe and shunt pipe constitute a folded aluminum metal pipe, and both ends of the aluminum metal pipe are provided with connecting pipes extending to the outside of the frame.

[0008] As a preferred technical solution, the base plate and the L-plate form a flue gas channel within the frame. The inclined lower surface of the base plate has two sets of air inlets located in the center, and the two sets of air inlets are connected to the flue gas channel.

[0009] As a preferred technical solution, the bottom of the L-plate is connected to a baffle plate between two adjacent sets of end pipe heads, and the bottom of the baffle plate is in a non-contact state with the upper surface of the base plate.

[0010] As a preferred technical solution, the two adjacent sets of end pipe heads are staggered and close to the L plate and the bottom plate, respectively, and the two adjacent sets of end pipe heads are divided into unit spaces by the baffle plate.

[0011] As a preferred technical solution, the purification cylinder includes an air collection frame fixed to the top of the frame body, an extension cylinder fixed to the top of the air collection frame, multiple sets of filter discs stacked on the top of the extension cylinder, a base cylinder fixedly connected to the top of the filter discs, and a fan installed inside the base cylinder above the filter discs.

[0012] As a preferred technical solution, the inner wall of the base cylinder is fixed with a positioning frame for positioning the fan, and the fan is fixed to the lower surface of the positioning frame with bolts.

[0013] In summary, the present invention has the following main advantages:

[0014] This invention reduces the flow rate of water through a heat exchange component, and, in conjunction with flue gas flowing in an S-shaped trajectory within the unit space, allows the heat in the flue gas to be fully transferred to the water. The diversion pipe increases the indirect contact area between the flue gas and the water, and the baffles extend the time the flue gas stays in each unit space, thus improving the efficiency of waste heat recovery from the flue gas. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a schematic diagram of the purification cylinder structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the waste heat recovery frame structure of this utility model;

[0018] Figure 4 This is a structural diagram of the heat exchange component of this utility model;

[0019] Figure 5 This is a front sectional view of the waste heat recovery frame of this utility model.

[0020] Figure 6 This is a cross-sectional view of the diversion tube of this utility model.

[0021] In the diagram: 100, waste heat recovery frame; 200, purification cylinder;

[0022] 110. Frame; 120. Base plate; 130. L-plate; 140. Baffle plate; 150. Heat exchange assembly; 151. End pipe head; 152. Diverter pipe; 153. Connecting pipe; 154. Baffle plate; 160. Flue gas passage; 170. Unit space; 180. Air inlet.

[0023] 210. Base cylinder; 220. Fan; 230. Positioning frame; 240. Filter disc; 250. Extension cylinder; 260. Air collection frame. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0025] The embodiments of this utility model will be described below based on its overall structure.

[0026] A flue gas heat recovery device with purification function, such as Figures 1 to 6As shown, the system includes a waste heat recovery frame 100, with a purification cylinder 200 for extracting flue gas mounted on top of the waste heat recovery frame 100. The waste heat recovery frame 100 includes a frame body 110 fixedly connected to the bottom of the purification cylinder 200. A bottom plate 120 with a central protrusion is fixed inside the frame body 110. Two sets of inclined tops of the bottom plate 120 are provided with L-plates 130 fixed to the front and rear inner walls of the waste heat recovery frame 100. Two sets of heat exchange components 150 connected to the inner walls of the waste heat recovery frame 100 are installed on the inclined surface of the bottom plate 120. The heat exchange components 150 include five pairs of end pipe heads 151 fixed to the front and rear inner walls of the waste heat recovery frame 100. Each pair of end pipe heads 151 is connected to multiple diversion pipes 152 at their end faces. Each diversion pipe 152 has baffles 154 distributed in a staggered manner fixed inside. Adjacent sets of end pipe heads 151 are connected by interleaved connecting pipes 153.

[0027] The bottom of L plate 130 is connected to a baffle plate 140 between two adjacent sets of end pipe heads 151. The bottom of the baffle plate 140 is in a non-contact state with the upper surface of the base plate 120.

[0028] Two adjacent sets of end pipe heads 151 are staggered and close to L plate 130 and bottom plate 120 respectively. The two adjacent sets of end pipe heads 151 are divided into unit space 170 by baffle 140.

[0029] The purification cylinder 200 includes an air collection frame 260 fixed to the top of the frame 110. An extension cylinder 250 is fixed to the top of the air collection frame 260. Multiple filter discs 240 are stacked on the top of the extension cylinder 250. A base cylinder 210 is fixedly connected to the top of the filter discs 240. A fan 220 is installed inside the base cylinder 210 above the filter discs 240. A positioning frame 230 for positioning the fan 220 is fixed to the inner wall of the base cylinder 210. The fan 220 is fixed to the lower surface of the positioning frame 230 with bolts.

[0030] The flue gas is drawn upwards by the negative pressure generated by the fan 220. At this point, the flue gas enters from the bottom of the frame 110 and, guided by the base plate 120, concentrates into the inlet 180. The flue gas enters the flue gas channel 160 (the first unit space 170) formed by the base plate 120 and the L-plate 130. Due to gaps between the multi-component diversion pipes 152 and between the diversion pipes and the base plate 120, a small amount of flue gas passes through the gap between the diversion pipes 152 and the base plate 120. However, the gap between the diversion pipes 152 and the L-plate 130 is relatively large, so most of the flue gas flows through the gap between the bottom of the multi-component diversion pipes 152 and the L-plate 130. This allows the flue gas to mix with the diversion pipes. As the contact area of ​​the flow tube 152 increases, the flue gas passes through the bottom of the baffle 140 and enters the adjacent unit space 170. The baffle 140 makes the flue gas enter the adjacent unit space 170 at a slower speed, which can prolong the contact time between the flue gas and the flow tube 152. Due to the baffle 154 inside the flow tube 152, the flow speed of the water in the flow tube 152 is also reduced, which can improve the efficiency of waste heat conversion in the flue gas. The flow tubes in the adjacent unit space 170 are staggered and close to the bottom plate 120 and L plate 130. Therefore, the flue gas flows in an S-shaped trajectory in the adjacent unit space 170, so that the heat of the flue gas is fully collected.

[0031] The flue gas flowing upward from inside the frame 110 is filtered by multiple sets of filter discs 240, which can remove dust particles from the flue gas and achieve the purpose of purifying the flue gas.

[0032] Please refer to this carefully. Figure 2 The end pipe 151, the connecting pipe 153 and the diverting pipe 152 form a folded aluminum metal pipe, and both ends of the aluminum metal pipe are provided with connecting pipes extending to the outside of the frame 110.

[0033] The aluminum metal is used to better transfer heat and improve heat exchange efficiency, and it is connected to the external water pipe through the connecting pipe so that water can flow in to carry out the heat exchange process.

[0034] Please refer to this carefully. Figure 5 The bottom plate 120 and the L plate 130 form a flue gas passage 160 within the frame 110. Two sets of air inlets 180 are provided on the inclined lower surface of the bottom plate 120 at the center position, and the two sets of air inlets 180 are connected to the flue gas passage 160.

[0035] This allows the flue gas to enter the flue gas passage 160 from the air inlet 180, heating the internal diversion pipe 152 and thus achieving the effect of collecting and utilizing the heat in the flue gas.

[0036] During operation, the flue gas is drawn upwards by the negative pressure generated by the fan 220. The flue gas enters from the bottom of the frame 110 and, guided by the base plate 120, concentrates into the inlet 180. The flue gas then enters the flue gas channel 160 (the first unit space 170) formed by the base plate 120 and the L-plate 130. Because there are gaps between the multi-component diversion pipes 152 and between the diversion pipes and the base plate 120, a small amount of flue gas passes through the gap between the diversion pipes 152 and the base plate 120. However, the gap between the diversion pipes 152 and the L-plate 130 is relatively large, so most of the flue gas flows through the gap between the multi-component diversion pipes 152 and the bottom of the L-plate 130. This allows the flue gas to flow smoothly. As the contact area with the diversion pipe 152 increases, the flue gas passes through the bottom of the baffle 140 and enters the adjacent unit space 170. The baffle 140 slows down the speed at which the flue gas enters the adjacent unit space 170, thus prolonging the contact time between the flue gas and the diversion pipe 152. Furthermore, due to the baffle 154 inside the diversion pipe 152, the flow speed of the water in the diversion pipe 152 is also reduced, thereby improving the efficiency of waste heat conversion in the flue gas. The diversion pipes in the adjacent unit space 170 are staggered and close to the bottom plate 120 and the L plate 130, so the flue gas flows in an S-shaped trajectory in the adjacent unit space 170, allowing the heat of the flue gas to be fully collected.

[0037] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A flue gas heat recovery device with purification function, comprising a waste heat recovery frame (100), characterized in that: The top of the waste heat recovery frame (100) is equipped with a purification cylinder (200) for extracting flue gas. The waste heat recovery frame (100) includes a frame body (110) fixedly connected to the bottom of the purification cylinder (200). A bottom plate (120) with a central protrusion is fixed inside the frame body (110). The bottom plate (120) has two sets of inclined tops, each equipped with an L-plate (130) fixed to the front and rear inner walls of the waste heat recovery frame (100). Two... A heat exchange assembly (150) is connected to the inner wall of the waste heat recovery frame (100). The heat exchange assembly (150) includes five pairs of end pipes (151) fixed to the front and rear inner walls of the waste heat recovery frame (100). Each pair of end pipes (151) has multiple branch pipes (152) connected to its end face. Each branch pipe (152) has baffles (154) fixed inside it in a staggered arrangement. Adjacent pairs of end pipes (151) are connected by connecting pipes (153).

2. The flue gas heat recovery device with purification function according to claim 1, characterized in that: The end pipe (151), connecting pipe (153) and shunt pipe (152) form a folded aluminum metal pipe, and both ends of the aluminum metal pipe are provided with connecting pipes extending to the outside of the frame (110).

3. The flue gas heat recovery device with purification function according to claim 1, characterized in that: The base plate (120) and L plate (130) form a flue gas passage (160) within the frame (110). Two sets of air inlets (180) are provided on the inclined lower surface of the base plate (120) at the center position. The two sets of air inlets (180) are connected to the flue gas passage (160).

4. The flue gas heat recovery device with purification function according to claim 1, characterized in that: The bottom of the L plate (130) is connected to a baffle plate (140) between two adjacent sets of end pipe heads (151), and the bottom of the baffle plate (140) is in a non-contact state with the upper surface of the base plate (120).

5. The flue gas heat recovery device with purification function according to claim 1, characterized in that: The two adjacent sets of end pipe heads (151) are staggered and close to the L plate (130) and the bottom plate (120), respectively. The two adjacent sets of end pipe heads (151) are divided into unit spaces (170) by the baffle plate (140).

6. The flue gas heat recovery device with purification function according to claim 1, characterized in that: The purification cylinder (200) includes an air collection frame (260) fixed to the top of the frame (110). An extension cylinder (250) is fixed to the top of the air collection frame (260). Multiple filter discs (240) are stacked on the top of the extension cylinder (250). A base cylinder (210) is fixedly connected to the top of the filter discs (240). A fan (220) is installed inside the base cylinder (210) above the filter discs (240).

7. The flue gas heat recovery device with purification function according to claim 6, characterized in that: The inner wall of the base cylinder (210) is fixed with a positioning frame (230) for positioning the fan (220), and the fan (220) is fixed to the lower surface of the positioning frame (230) by bolts.

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