A waste heat recycling device for kitchen waste incinerator

Abstract

This invention relates to the field of waste heat recovery and utilization technology, and in particular to a waste heat recovery and utilization device for a kitchen waste incinerator, comprising a flue gas furnace, two regulating components, two positioning components, and an evaporator. The flue gas furnace has an internal flue gas channel with a curved design. Two connecting seats are installed at both ends of the flue gas furnace, one for flue gas inlet and the other for flue gas outlet. The two regulating components are respectively located on both sides of the flue gas channel, forming a high-temperature channel between the regulating components and the inner wall of the flue gas furnace. The two positioning components are respectively engaged on both sides of the flue gas furnace, with one end of each positioning component located at a curved position outside the flue gas furnace. The evaporator is located at a curved position outside the flue gas furnace, with both ends fixed to one end of each of the two positioning components. A through hole is provided on the outside of the flue gas furnace, and the through hole is connected to the evaporator via a connecting pipe. The evaporator is filled with room temperature water, and the steam generated by the evaporation of the water can be transported to a designated location through the evaporator.

Description

Technical Field

[0001] This invention relates to the field of waste heat recovery and utilization technology, and in particular to a waste heat recovery and utilization device for a kitchen waste incinerator. Background Technology

[0002] During the incineration of food waste, the incinerator generates a large amount of high-temperature flue gas with temperatures reaching 800-1200℃, containing abundant waste heat. Direct emission of this gas not only wastes energy but also exacerbates thermal pollution. Existing waste heat recovery technologies for food waste incinerators mainly employ equipment such as shell-and-tube heat exchangers and plate heat exchangers to recover heat through direct or indirect heat exchange between flue gas and cold water. However, these technologies suffer from the following problems:

[0003] 1. Currently, most commonly used flue gas passages are designed in a straight line, resulting in a short residence time of flue gas in the heat exchange area. The heat is not fully transferred before being discharged, and the heat exchange efficiency is generally low.

[0004] 2. The heat exchange channel width is fixed, and it is impossible to adjust the heat exchange area or flue gas velocity according to flue gas flow rate and temperature fluctuations. It has poor adaptability and is prone to problems such as insufficient heat exchange at high flow rates and excessive resistance at low flow rates.

[0005] 3. Waste heat recovery methods are limited to hot water production, resulting in low steam conversion efficiency. Furthermore, the equipment has a loose structure and occupies a large space. The positioning accuracy of components is low, and the sealing of connection parts is poor, which can easily lead to flue gas leakage or water leakage, posing safety hazards.

[0006] 4. Kitchen waste incineration residues carried in the flue gas are prone to accumulate and block the channel, making cleaning difficult and affecting the long-term stable operation of the equipment. Summary of the Invention

[0007] Therefore, it is necessary to provide a waste heat recovery and utilization device for a kitchen waste incinerator to address the above-mentioned technical problems. The device extends the heat exchange path of the flue gas by bending the flue gas channel, and the regulating component optimizes the heat focusing effect, so that the waste heat is converted into high-value steam and the recovery efficiency is higher.

[0008] This invention provides a waste heat recovery and utilization device for a kitchen waste incinerator, comprising:

[0009] The flue gas furnace has an internal flue gas passage that is curved. A connecting seat is installed at each end of the flue gas furnace, one of which is used for flue gas inlet and the other for flue gas outlet.

[0010] Two adjusting components are respectively disposed on both sides of the flue gas passage, and the adjusting components and the inner wall of the flue gas furnace form a high-temperature passage;

[0011] Two positioning components are respectively engaged on both sides of the flue gas furnace, and one end of the positioning component is located at a curved position outside the flue gas furnace;

[0012] An evaporator is located at a curved position outside the flue gas furnace, and both ends of the evaporator are respectively fixed to one end of the two positioning members;

[0013] The flue gas furnace has a through hole on its outer side, and the through hole is connected to the evaporator through a connecting pipe. The evaporator is filled with room temperature water, and the steam generated by the evaporation of the water can be transported to a designated location through the evaporator.

[0014] In one embodiment, the flue gas furnace includes a bend and a first end plate; a first end plate is respectively provided at both ends of the bend, the orientation of two adjacent bends is opposite, the first end plates at one end of two adjacent bends are attached to each other and fixedly connected, and the internal connections of multiple bends are interconnected to form a flue gas channel arranged in a continuous wavy line.

[0015] In one embodiment, the connecting seat includes a fixed frame, a second end plate, and a folding plate; the second end plate is disposed at one end of the fixed frame, the second end plate is attached to the first end plate, and the two are connected and fixed by fasteners; the two folding plates are symmetrically arranged on the left and right sides of the fixed frame, so that the width of the internal passage of the connecting seat is smaller than the width of the flue gas passage.

[0016] In one embodiment, the adjusting member includes a bent plate and an inclined plate; two bent plates are movably engaged within the flue gas passage and can move along the width direction of the flue gas passage; the minimum distance between the two bent plates is the same as the interval between the two folded plates; a plurality of inclined plates are arranged in a ring array on the opposite side of the two bent plates; the inclined plates and the bent plates form an angle with the opening facing the same direction as the flue gas flow direction within the flue gas passage.

[0017] In one embodiment, a groove is provided on the side of the bent plate where the inclined plate is not provided. The shape of the groove is consistent with the bending shape of the bent plate, and the two ends of the groove respectively penetrate the two planar ends of the bent plate.

[0018] In one embodiment, a plurality of through holes are spaced apart on the side wall of the bend, and a first positioning tube is provided on the bottom surface of the groove. The first positioning tube is perpendicular to the bottom surface of the groove and is inserted into the through holes on the side wall of the bend. One end of the first positioning tube connected to the bottom surface of the groove has a through opening.

[0019] In one embodiment, the orientation of the through opening is the same as the radial direction of the bent plate.

[0020] In one embodiment, the positioning element includes a second positioning tube and an arc-shaped plate; the second positioning tube is disposed on both sides of the bend, and the central axis of the second positioning tube coincides with the central axis of the bend; the arc-shaped plate is attached to one side of the bend, one end of the arc-shaped plate is connected to the second positioning tube, and the edge of the arc-shaped plate abuts against two first end plates.

[0021] In one embodiment, the evaporator includes a cylindrical shell, a first connector, a spiral tube, a second connector, and a third connector. The two ends of the cylindrical shell are respectively installed inside two second positioning tubes. The two first connectors are respectively located at both ends of the cylindrical shell and are connected by the spiral tube. The interior of the cylindrical shell is used to fill with room temperature water. A second connector is located on the upper side of the cylindrical shell and is used for outputting water vapor. The first connector is used to connect to the first positioning tubes via a connecting tube. The ends of the other first positioning tubes are covered with sealing caps.

[0022] In one embodiment, a third connector is provided on the lower side of the cylindrical housing, the third connector being used for drainage.

[0023] The aforementioned waste heat recovery and utilization device for kitchen waste incinerators involves the high-temperature flue gas generated from kitchen waste incineration entering the flue gas furnace through the inlet side connector. The gas flows along a curved flue gas channel, where the regulating component and the inner wall of the furnace form a high-temperature channel for focusing heat, extending the flue gas residence time. The heat from the flue gas is transferred to the evaporator through the furnace's through-holes and connecting pipes, heating the room-temperature water injected inside. The steam generated from the evaporation of the water is then transported by the evaporator to designated applications such as heating and power generation. The cooled flue gas is discharged from the outlet side connector. The curved flue gas channel extends the heat exchange path, and the regulating component optimizes the heat focusing effect, converting waste heat into high-value steam for higher recovery efficiency. The overall structure is compact and highly integrated, combining heat exchange and transportation functions, making it suitable for a wide range of applications. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 A three-dimensional structural schematic diagram of the waste heat recovery and utilization device provided by the present invention;

[0026] Figure 2 This is one of the cross-sectional structural schematic diagrams of the waste heat recovery and utilization device provided by the present invention;

[0027] Figure 3 A second schematic cross-sectional view of the waste heat recovery and utilization device provided by the present invention;

[0028] Figure 4 This is a partial structural schematic diagram of the flue gas furnace provided by the present invention;

[0029] Figure 5 This is a schematic diagram of the structure of the adjusting member provided by the present invention;

[0030] Figure 6 This is a schematic diagram of the positioning element provided by the present invention;

[0031] Figure 7 This is a schematic diagram showing the position of the connecting pipe provided by the present invention;

[0032] Figure 8 This is a schematic diagram of the structure of the evaporator provided by the present invention.

[0033] Figure label:

[0034] 100. Flue gas furnace; 110. Bend; 111. Flue gas passage; 112. High temperature passage; 113. Through hole; 120. First end plate; 200. Adjusting component; 210. Bend plate; 211. Groove; 220. First positioning tube; 221. Through port; 230. Inclined plate; 300. Connecting seat; 310. Fixing frame; 320. Second end plate; 330. Folded plate; 400. Positioning component; 410. Second positioning tube; 420. Arc plate; 500. Evaporator; 510. Columnar shell; 520. First connector; 530. Spiral tube; 540. Second connector; 550. Third connector; 600. Sealing cover; 700. Connecting pipe. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] The following is combined with Figures 1 to 8 This invention describes a waste heat recovery and utilization device for a kitchen waste incinerator.

[0037] like Figures 1 to 3As shown, in one embodiment, a waste heat recovery and utilization device for a kitchen waste incinerator includes a flue gas furnace 100, two regulating components 200, two positioning components 400, and an evaporator 500; the flue gas furnace 100 has a flue gas channel 111 inside, the flue gas channel 111 is curved, and a connecting seat 300 is installed at each end of the flue gas furnace 100, one connecting seat 300 is used for flue gas inlet, and the other connecting seat 300 is used for flue gas outlet; Two adjusting components 200 are respectively installed on both sides of the flue gas passage 111, and the adjusting components 200 and the inner wall of the flue gas furnace 100 form a high-temperature passage 112; two positioning components 400 are respectively snapped onto both sides of the flue gas furnace 100, and one end of the positioning component 400 is located at the curved position outside the flue gas furnace 100; the evaporator 500 is located at the curved position outside the flue gas furnace 100, and both ends of the evaporator 500 are respectively fixed to one end of the two positioning components 400; a through hole 113 is opened on the outside of the flue gas furnace 100, and the through hole 113 is connected to the evaporator 500 through a connecting pipe 700. The evaporator 500 is filled with room temperature water, and the steam generated by the evaporation of the water can be transported to a designated position through the evaporator 500.

[0038] The aforementioned waste heat recovery and utilization device for a kitchen waste incinerator involves the high-temperature flue gas generated from the incineration of kitchen waste entering the flue gas furnace 100 through the inlet side connector 300. The gas flows along the curved flue gas channel 111, where the regulating component 200 and the inner wall of the flue gas furnace 100 form a high-temperature channel 112 that focuses heat, extending the flue gas residence time. The heat from the flue gas is transferred to the evaporator 500 through the through-hole 113 and connecting pipe 700 of the flue gas furnace 100, heating the room-temperature water injected inside. The steam generated from the evaporation of the water is then transported by the evaporator 500 to designated applications such as heating and power generation. The cooled flue gas is discharged from the outlet side connector 300. The curved flue gas channel 111 extends the heat exchange path of the flue gas, and the regulating component 200 optimizes the heat focusing effect, converting waste heat into high-value steam with higher recovery efficiency. The overall structure is compact and highly integrated, combining heat exchange and transportation functions, making it suitable for a wide range of applications.

[0039] like Figure 4 As shown, in one embodiment, the flue gas furnace 100 includes a bend 110 and a first end plate 120; a first end plate 120 is respectively provided at both ends of the bend 110, the orientations of two adjacent bends 110 are opposite, the first end plates 120 at one end of two adjacent bends 110 are attached to each other and fixedly connected, and the internal connections of multiple bends 110 are interconnected to form a flue gas channel 111 arranged in a continuous wavy line shape.

[0040] Specifically, multiple bends 110 are fixed in opposite directions by first end plates 120 at both ends, forming a continuous wavy linear flue gas channel 111. The high-temperature flue gas changes its flow direction multiple times in the bend path, making full contact with the wall of the flue gas furnace 100. Compared with a straight channel, the wavy linear channel has a larger heat exchange contact area, a longer flue gas residence time, and a significantly improved heat exchange efficiency. The modular design of the bends 110 facilitates disassembly and maintenance, and the number of bends 110 can be increased or decreased according to the waste heat recovery requirements.

[0041] In one embodiment, the connecting seat 300 includes a fixed frame 310, a second end plate 320, and a folding plate 330. The second end plate 320 is disposed at one end of the fixed frame 310 and is attached to the first end plate 120. The two are connected and fixed by fasteners. The two folding plates 330 are symmetrical about left and right and are embedded on the left and right sides of the fixed frame 310 to make the width of the internal passage of the connecting seat 300 smaller than the width of the flue gas passage 111.

[0042] Specifically, the fixed frame 310 is fastened to the first end plate 120 of the flue gas furnace 100 via the second end plate 320. The symmetrical folding plates 330 reduce the width of the internal passage of the connecting seat 300, thereby increasing the flow velocity of the flue gas before it enters the flue gas channel 111 and enhancing the turbulent heat transfer effect. The folding plate 330 design achieves flue gas acceleration and buffering, enhancing heat transfer intensity; the fastener connection method facilitates equipment maintenance and reduces maintenance costs.

[0043] like Figure 5 As shown, in one embodiment, the adjusting member 200 includes a bent plate 210 and an inclined plate 230; the two bent plates 210 are movably engaged in the flue gas passage 111 and can move along the width direction of the flue gas passage 111. The minimum distance between the two bent plates 210 is the same as the distance between the two folded plates 330. A plurality of inclined plates 230 are arranged in a ring array on the opposite side of the two bent plates 210. The inclined plates 230 and the bent plates 210 form an angle with the opening facing the same direction as the flue gas flow direction in the flue gas passage 111.

[0044] Specifically, the bent plate 210 moves along the width of the flue gas channel 111, and a high-temperature channel 112 is formed between the bent plate 210 and the inner wall of the bent pipe 110. The channel spacing matching the baffle plate 330 is adjusted to adapt to different flue gas flow rates. The inclined plate 230 of the annular array forms an angle with the flue gas flow direction, guiding the flue gas to form turbulence and blocking residue deposition. The width of the heat exchange channel can be dynamically adjusted according to the flue gas parameters to adapt to fluctuating flow conditions. The inclined plate 230 promotes turbulence formation, improves the heat transfer coefficient, and can effectively prevent channel blockage and extend the cleaning cycle.

[0045] In one embodiment, a groove 211 is provided on the side of the bent plate 210 where the inclined plate 230 is not provided. The shape of the groove 211 is consistent with the bending shape of the bent plate 210, and the two ends of the groove 211 respectively penetrate the two planar ends of the bent plate 210.

[0046] Specifically, the groove 211 reduces the thickness of the middle part of the bent plate 210, resulting in higher heat conduction efficiency.

[0047] In one embodiment, a plurality of through holes 113 are spaced apart on the side wall of the bend 110, and a first positioning tube 220 is provided on the bottom surface of the groove 211. The first positioning tube 220 is perpendicular to the bottom surface of the groove 211 and is inserted into the through holes 113 on the side wall of the bend 110. One end of the first positioning tube 220 connected to the bottom surface of the groove 211 has a through opening 221.

[0048] Specifically, the first positioning tube 220 is inserted into the through hole 113 on the side wall of the bent pipe 110 to achieve precise positioning of the adjusting component 200; the through port 221 of the first positioning tube 220 connects the groove 211 and the connecting pipe 700, and the heat of the flue gas is transferred to the connecting pipe 700 through the groove 211, the through port 221, and the first positioning tube 220, and finally introduced into the evaporator 500. The first positioning tube 220 has the dual functions of positioning and fixing and heat conduction, which simplifies the structural design; the plug-in installation ensures positioning accuracy, and with the heat transfer of the through port 221, heat loss is reduced and energy transfer efficiency is improved.

[0049] In one embodiment, the orientation of the through opening 221 is the same as the radial direction of the bent plate 210.

[0050] Specifically, the through-hole 221 is oriented in the same direction as the radius of the bend 210, allowing the radial airflow of flue gas within the bend to smoothly enter the first positioning pipe 220, avoiding resistance loss caused by airflow impact. The radial through-hole design reduces flue gas flow resistance and energy consumption; smooth airflow reduces residue deposition at the through-hole 221, lowering the risk of blockage and ensuring heat transfer stability.

[0051] like Figure 6 As shown, in one embodiment, the positioning member 400 includes a second positioning tube 410 and an arc plate 420; the second positioning tube 410 is disposed on both sides of the bend 110, and the central axis of the second positioning tube 410 coincides with the central axis of the bend 110; the arc plate 420 is attached to one side of the bend 110; one end of the arc plate 420 is connected to the second positioning tube 410; and the edge of the arc plate 420 abuts against the two first end plates 120.

[0052] Specifically, the arc-shaped plate 420 of the positioning component 400 fits against the outer wall of the bend 110, and its edge abuts against the first end plate 120 for lateral fixation. The second positioning tube 410 coincides with the central axis of the bend 110, providing a precise coaxiality installation reference for the evaporator 500. The arc-shaped plate 420 and the first end plate 120 work together to position the evaporator 500, reducing the coaxiality error of the evaporator 500 installation and avoiding leakage caused by vibration. The fitted design enhances positioning stability, can withstand the vibration load caused by flue gas impact, and extends the service life of the equipment.

[0053] like Figure 7 and Figure 8 As shown, in one embodiment, the evaporator 500 includes a cylindrical shell 510, a first connector 520, a spiral tube 530, a second connector 540, and a third connector 550. The two ends of the cylindrical shell 510 are respectively installed in two second positioning tubes 410. The two first connectors 520 are respectively disposed at the two ends of the cylindrical shell 510 and are connected to each other through the spiral tube 530. The interior of the cylindrical shell 510 is used to fill with room temperature water. The second connector 540 is disposed on the upper side of the cylindrical shell 510 and is used for the output of water vapor. The first connector 520 is used to connect to the first positioning tube 220 through the connecting tube 700. The ends of the other first positioning tubes 220 are covered with sealing caps 600.

[0054] Specifically, room temperature water is filled into the cylindrical shell 510, and heat is received from the first positioning tube 220 through the first connector 520 and connecting pipe 700. The spiral tube 530 connects the two ends of the first connector 520, increasing the contact area between the water and heat and accelerating water evaporation. The generated steam is output from the second connector 540, and the idle first positioning tube 220 is sealed by the sealing cap 600 to prevent leakage. The spiral tube 530 increases the heat exchange area of ​​the water and improves the steam generation efficiency. The multi-connector design realizes the separation of steam output and heat introduction functions, and the sealing cap 600 ensures the system's airtightness and high steam purity, which can be directly used in industrial or civil scenarios.

[0055] In one embodiment, a third connector 550 is provided on the lower side of the cylindrical housing 510, and the third connector 550 is used for drainage.

[0056] Specifically, when the evaporator 500 requires maintenance, water replacement, or discharge of residual wastewater, the third connector 550 can be opened to quickly drain the internal water without disassembling the entire device. The third connector 550 enables rapid water discharge, facilitating equipment cleaning, descaling, and maintenance, and shortening downtime for maintenance. It also prevents water from stagnating and deteriorating over time, thus avoiding reduced heat exchange efficiency and further extending the service life of the evaporator 500.

[0057] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A waste heat recovery and utilization device for a kitchen waste incinerator, characterized in that, include: The flue gas furnace has an internal flue gas passage that is curved. A connecting seat is installed at each end of the flue gas furnace, one of which is used for flue gas inlet and the other for flue gas outlet. Two adjusting components are respectively disposed on both sides of the flue gas passage, and the adjusting components and the inner wall of the flue gas furnace form a high-temperature passage; Two positioning components are respectively engaged on both sides of the flue gas furnace, and one end of the positioning component is located at a curved position outside the flue gas furnace; An evaporator is located at a curved position outside the flue gas furnace, and both ends of the evaporator are respectively fixed to one end of the two positioning members; The flue gas furnace has a through hole on its outer side, and the through hole is connected to the evaporator through a connecting pipe. The evaporator is filled with room temperature water, and the steam generated by the evaporation of the water can be transported to a designated location through the evaporator. The flue gas furnace includes a bent pipe and a first end plate; a first end plate is provided at each end of the bent pipe, the two adjacent bent pipes face opposite directions, the first end plates at one end of the two adjacent bent pipes are attached to each other and fixedly connected, and the internal connections of the multiple bent pipes are connected to form a flue gas channel arranged in a continuous wavy line. The connecting seat includes a fixed frame, a second end plate, and a folding plate; the second end plate is disposed at one end of the fixed frame, the second end plate is attached to the first end plate, and the two are connected and fixed by fasteners; the two folding plates are symmetrically arranged on the left and right sides of the fixed frame, so that the width of the internal passage of the connecting seat is smaller than the width of the flue gas passage. The adjusting component includes a bent plate and an inclined plate; two bent plates are movably engaged in the flue gas passage and can move along the width direction of the flue gas passage. The minimum distance between the two bent plates is the same as the interval between the two folded plates. A plurality of inclined plates are arranged in a ring array on the opposite side of the two bent plates. The inclined plates and the bent plates form an angle with the opening facing the same direction as the flue gas flow in the flue gas passage.

2. The waste heat recovery and utilization device for a kitchen waste incinerator according to claim 1, characterized in that, The curved plate has a groove on the side without the inclined plate. The shape of the groove is consistent with the bending shape of the curved plate, and the two ends of the groove pass through the two planar ends of the curved plate, respectively.

3. The waste heat recovery and utilization device for a kitchen waste incinerator according to claim 2, characterized in that, The side wall of the bend is provided with multiple through holes spaced apart. A first positioning tube is provided on the bottom surface of the groove. The first positioning tube is perpendicular to the bottom surface of the groove and is inserted into the through holes on the side wall of the bend. One end of the first positioning tube connected to the bottom surface of the groove has a through opening.

4. The waste heat recovery and utilization device for a kitchen waste incinerator according to claim 3, characterized in that, The orientation of the through opening is the same as the radial direction of the bent plate.

5. The waste heat recovery and utilization device for a kitchen waste incinerator according to claim 4, characterized in that, The positioning component includes a second positioning tube and an arc-shaped plate; the second positioning tube is disposed on both sides of the bend, and the central axis of the second positioning tube coincides with the central axis of the bend; the arc-shaped plate is attached to one side of the bend, one end of the arc-shaped plate is connected to the second positioning tube, and the edge of the arc-shaped plate abuts against the two first end plates.

6. The waste heat recovery and utilization device for a kitchen waste incinerator according to claim 5, characterized in that, The evaporator includes a cylindrical shell, a first connector, a spiral tube, a second connector, and a third connector. The two ends of the cylindrical shell are respectively installed inside two second positioning tubes. The two first connectors are respectively located at both ends of the cylindrical shell and are connected by the spiral tube. The interior of the cylindrical shell is used to fill with room temperature water. A second connector is located on the upper side of the cylindrical shell and is used for outputting water vapor. The first connector is used to connect to the first positioning tubes via a connecting tube. The ends of the other first positioning tubes are covered with sealing caps.

7. The waste heat recovery and utilization device for a kitchen waste incinerator according to claim 6, characterized in that, A third connector is provided on the lower side of the cylindrical shell, and the third connector is used for drainage.

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