A waste heat utilization system and a waste heat utilization method

Abstract

This invention relates to the field of energy utilization technology, and more particularly to a waste heat utilization system and method. The waste heat utilization system of this invention utilizes a flue gas filter, a waste heat utilization box, and a condenser to filter the flue gas before heat exchange and condense the flue gas after heat exchange, ensuring smooth flue gas flow, minimizing system losses, and resulting in environmentally friendly emissions and minimal environmental damage. During heat exchange, the waste heat exchange ring and regulating pipe work together to form an S-shaped waste heat utilization channel. The inlet position and flow rate are adjustable, achieving efficient heat exchange between the flue gas and the heat absorber. A clearing component and a magnetic insulation component work together. On one hand, the insulation component balances the heat of the heat absorber above and below; on the other hand, the magnetic component works with a metal clearing component, allowing the metal clearing component to move and clear the waste heat utilization channel, further ensuring efficient waste heat utilization.

Description

Technical Field

[0001] This invention relates to the field of energy utilization technology, and in particular to a waste heat utilization system and method. Background Technology

[0002] Waste heat refers to the sensible and latent heat in energy-consuming equipment of industrial enterprises that has not been rationally utilized in the original design due to limitations imposed by historical, technological, and conceptual factors. It includes waste heat from high-temperature exhaust gases, cooling media, waste steam and wastewater, high-temperature products and slag, chemical reactions, combustible waste gases and liquids, and waste materials. According to surveys, the total waste heat resources of various industries account for approximately 17%-67% of their total fuel consumption, and about 60% of these resources are recyclable. Flue gas is a common byproduct of industrial production; direct emission not only wastes energy but also affects the surrounding air environment. Therefore, how to efficiently utilize its waste heat has become a concern. Summary of the Invention

[0003] To address the problems existing in the background technology, a waste heat utilization system and waste heat utilization method are proposed.

[0004] This invention proposes a waste heat recovery system, comprising a flue gas filter, a waste heat recovery box, and a condenser connected in sequence. The waste heat recovery box is equipped with an inlet pipe, an outlet pipe, and a lifting drive box, and also includes waste heat exchange rings, a regulating pipe, a dredging component, and a magnetic insulation component. Multiple waste heat exchange rings are located inside the waste heat recovery box and are coaxially arranged along the height of the box, with internal circulation for flue gas and external circulation for the heat absorber. The regulating pipe connects adjacent waste heat exchange rings and is also connected to the flue gas filter, used to regulate the position and flow rate of flue gas entering the waste heat exchange rings. By connecting all the waste heat exchange rings in series, a connected waste heat recovery channel is formed. The dredging component extends through the waste heat recovery channel and is equipped with a metal dredging element that moves along the waste heat recovery channel. The magnetic heat-insulating component is driven by a lifting drive box to move up and down. At the same time, the magnetic heat-insulating component is equipped with heat-insulating parts and magnetic parts. The magnetic heat-insulating component passes through the center of the waste heat exchange ring in sequence through the lifting and lowering. During this process, on the one hand, the heat-insulating parts balance the heat absorption agent above and below, and on the other hand, the magnetic parts cooperate with the metal unblocking parts to move and unblock the waste heat utilization channel.

[0005] Preferably, the magnetic insulation component includes a traction rope; the upper end of the traction rope is connected to the lifting drive end of the lifting drive box, and the lower end is connected to the rotary drive box; an insulation cylinder is provided on the rotary drive end of the rotary drive box; the insulation cylinder is filled with insulation material, and an installation frame is provided on its outer periphery; a magnetic component is provided on the installation frame.

[0006] Preferably, the insulation cylinder has a cover and a leakage hole on the side wall, and the insulation component inside is a number of pebbles of uniform size and shape.

[0007] Preferably, the mounting bracket is ring-shaped, forming a ring around the side wall of the insulation cylinder; the magnetic components are electromagnets, arranged in the front, back, left, and right positions of the mounting bracket.

[0008] Preferably, ventilators are provided on adjacent waste heat exchange rings with opposite positions; a limiting sealing ring is provided inside the ventilator; the two ends of the regulating pipe extend into the corresponding ventilator, abut against the limiting sealing ring, and are fixed by screws; the middle part of the regulating pipe is fitted with an air inlet sleeve; an air inlet valve is provided on the air inlet sleeve; the air inlet valve connects the flue gas filter and the waste heat utilization channel.

[0009] Preferably, the unblocking component includes an installation node; an installation column is provided on the limiting sealing ring; the installation node is provided on the installation column; a strip steel frame is provided through the regulating pipe; an annular steel frame is provided in the waste heat exchange ring; both the strip steel frame and the annular steel frame are fixed by the installation node to form a moving track that matches the shape of the waste heat utilization channel; and the metal unblocking parts are slidably provided on the moving track.

[0010] Preferably, the metal drain cleaner includes a metal ball; the metal ball is slidably sleeved on the strip steel frame / ring steel frame, attracted by a magnetic component, and moves synchronously along the strip steel frame / ring steel frame, with drain spikes provided on its outer periphery.

[0011] This invention further proposes a waste heat utilization method including the above-mentioned waste heat utilization system, the steps of which are as follows:

[0012] S1. Pass the exhaust gas into the flue gas filter for filtration to remove impurities and particles, so that it meets the emission standards.

[0013] S2. When the flue gas enters the waste heat utilization box, it first enters the bottom of the waste heat utilization channel and moves upward along its path. During this process, new flue gas continuously enters the waste heat utilization channel from the air inlet valves at different positions. The amount of gas entering can be adjusted to keep the flue gas temperature in the entire waste heat utilization channel stable.

[0014] S3: Flue gas circulates inside the waste heat exchange ring, and heat absorber circulates outside the ring, achieving heat exchange during the circulation process.

[0015] S4. During the heat exchange process, the insulation cylinder moves up and down and rotates. The insulation component absorbs heat from the high-temperature area and transfers it to the low-temperature area to achieve temperature balance. The magnetic component attracts the metal unblocking component to move synchronously on the strip steel frame / ring steel frame to achieve the purpose of unblocking the waste heat utilization channel.

[0016] S5. The flue gas after heat exchange is condensed by the condenser and then discharged.

[0017] Compared with existing technologies, the present invention has the following beneficial technical effects: The waste heat utilization system of the present invention utilizes a flue gas filter, a waste heat utilization box, and a condenser to filter the flue gas before heat exchange and condense the flue gas after heat exchange, ensuring smooth flue gas flow, minimizing system losses, and resulting in environmentally friendly emissions and minimal environmental damage. During heat exchange, the waste heat exchange ring and regulating pipe work together to form an S-shaped waste heat utilization channel, with adjustable air inlet position and volume, achieving efficient heat exchange between the flue gas and the heat absorber. The unblocking component and the magnetic insulation component work together to balance the heat of the heat absorber above and below through the insulation component, and to unblock the waste heat utilization channel by moving the magnetic component and the metal unblocking component, further ensuring the efficiency of waste heat utilization. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the waste heat recovery box in this invention.

[0019] Figure 2 This is a cross-sectional view of the waste heat recovery box in this invention.

[0020] Figure 3 This is a cross-sectional view of the waste heat exchange ring and regulating pipe in this invention.

[0021] Figure 4 This is a schematic diagram of the magnetic heat-insulating component in this invention.

[0022] Figure 5 This is a partial structural diagram of the unblocking component in this invention.

[0023] Reference numerals: 1. Flue gas filter; 2. Waste heat recovery box; 3. Condenser; 4. Inlet pipe; 5. Outlet pipe; 6. Inlet valve; 7. Waste heat exchange ring; 8. Regulating pipe; 801. Inlet sleeve; 9. Lifting drive box; 10. Magnetic insulation component; 1001. Insulation cylinder; 1002. Rotary drive box; 1003. Traction rope; 1004. Mounting frame; 11. Unblocking component; 1101. Circular steel frame; 1102. Strip steel frame; 1103. Mounting node; 1104. Metal ball; 12. Vent sleeve; 1201. Limiting sealing ring; 1202. Screw; 1203. Mounting column. Detailed Implementation

[0024] Example 1

[0025] like Figures 1-3As shown, the waste heat utilization system proposed in this invention includes a flue gas filter 1, a waste heat utilization box 2, and a condenser 3 connected in sequence. The flue gas filter 1 filters the exhaust gas, removing impurities and particles to meet emission standards. The waste heat utilization box 2 recovers and utilizes the waste heat from the filtered flue gas. The flue gas is finally condensed by the condenser 3 and then discharged. The waste heat utilization box 2 is equipped with an inlet pipe 4, an outlet pipe 5, and a lifting drive box 9. It also includes a waste heat exchange ring 7, a regulating pipe 8, a dredging component 11, and a magnetic heat preservation component 10.

[0026] The waste heat exchange ring 7 is located inside the waste heat utilization box 2. Multiple sets are coaxially arranged along the height direction of the waste heat utilization box 2, with equal spacing and parallel to each other. The inside is for flue gas to circulate, and the outside is for heat absorber to circulate. Heat exchange is achieved during the circulation process.

[0027] The regulating pipe 8 is connected to the adjacent waste heat exchange ring 7 and also to the flue gas filter 1. It is used to regulate the position and flow rate of the flue gas entering the waste heat exchange ring 7. By connecting all the waste heat exchange rings 7 in series, a connected waste heat utilization channel is formed. The flue gas moves from bottom to top along an S-shaped trajectory in the waste heat utilization channel. Heat exchange occurs during the movement. New flue gas enters the waste heat utilization channel through the regulating pipes 8 at different positions and merges into the cooled flue gas, so that the flue gas temperature in the waste heat utilization channel is stable and the heat exchange effect is good.

[0028] The unblocking component 11 runs through the waste heat utilization channel, and is actually a metal unblocking part that moves along the waste heat utilization channel.

[0029] The magnetic heat-insulating component 10 is driven to move up and down by the lifting drive box 9. It is also equipped with heat-insulating components and magnetic components. The magnetic heat-insulating component 10 passes through the center of the waste heat exchange ring 7 in sequence by lifting. During this process, on the one hand, the heat-insulating component balances the heat absorption agent above and below, and on the other hand, the magnetic component cooperates with the metal unblocking component to move and unblock the waste heat utilization channel.

[0030] Example 2

[0031] Based on Embodiment 1, this embodiment discloses the specific structure of the magnetic heat-insulating component 10.

[0032] like Figure 4As shown, the magnetic heat-insulating component 10 includes a traction rope 1003; the upper end of the traction rope 1003 is connected to the lifting drive end of the lifting drive box 9, and the lower end is connected to the rotary drive box 1002; a heat-insulating cylinder 1001 is installed on the rotary drive end of the rotary drive box 1002; the heat-insulating cylinder 1001 is filled with heat-insulating components, and a mounting frame 1004 is installed on its outer periphery; a magnetic suction component is installed on the mounting frame 1004. Both the lifting drive box 9 and the rotary drive box 1002 are equipped with motors, which drive the traction rope 1003 to extend or retract, or drive the heat-insulating cylinder 1001 to rotate, via the shaft of the corresponding motor. When the traction rope 1003 extends or retracts, it drives the rotary drive box 1002 to move up and down in the waste heat utilization channel. The heat-insulating components inside the heat-insulating cylinder 1001 absorb heat from high-temperature areas and transfer it to low-temperature areas, achieving temperature balance. The magnetic suction component moves synchronously with the lifting and rotation of the heat-insulating cylinder 1001, adjusting the position of the metal unblocking component to achieve the purpose of unblocking the waste heat utilization channel.

[0033] It should be further explained that the 1001 insulation cylinder has a lid and drainage holes on the side wall. The internal insulation component consists of multiple pebbles of uniform size and shape. The pebbles are non-toxic, harmless, low-cost, environmentally friendly, energy-efficient, and have a certain degree of heat insulation performance. The heat absorber seeps in through the drainage holes, contacts the pebbles, and transfers heat, resulting in uniform heat exchange and high waste heat utilization.

[0034] It should be further explained that the mounting bracket 1004 is ring-shaped, forming a circle around the side wall of the insulation cylinder 1001; the magnetic attraction component is an electromagnet, arranged in the front, back, left, and right directions of the mounting bracket 1004. As the mounting bracket 1004 rises, falls, and rotates, the electromagnet is energized to attract and release the metal drain cleaner, adjusting its position to achieve the purpose of unblocking the waste heat utilization channel.

[0035] Example 3

[0036] Based on Embodiment 1 and Embodiment 2, this embodiment discloses the installation structure of the waste heat exchange ring 7 and the regulating pipe 8.

[0037] like Figure 2 and Figure 5As shown, adjacent waste heat exchange rings 7 are each equipped with a vent sleeve 12 positioned opposite each other; a limiting sealing ring 1201 is installed inside the vent sleeve 12; both ends of the regulating pipe 8 extend into the corresponding vent sleeve 12, abutting against the limiting sealing ring 1201, and are fixed by screws 1202; the middle part of the regulating pipe 8 is fitted with an air inlet sleeve 801; an air inlet valve 6 is installed on the air inlet sleeve 801; the air inlet valve 6 connects the flue gas filter 1 and the waste heat utilization channel. When connecting the waste heat utilization channel, both ends of the regulating pipe 8 are extended into the corresponding vent sleeve 12, abutting against the limiting sealing ring 1201, and then the screws 1202 are rotated to fix the regulating pipe 8. The flue gas filtered by the flue gas filter 1 enters the waste heat utilization channel from the air inlet valves 6 at different positions. The amount of gas entering is adjustable, so that the flue gas temperature in the entire waste heat utilization channel is stable and the waste heat utilization rate is high.

[0038] Example 4

[0039] Based on Embodiment 1, Embodiment 2 and Embodiment 3, this embodiment discloses the specific structure of the unblocking component 11.

[0040] like Figure 2 and 5 As shown, the unblocking component 11 includes an installation node 1103; an installation column 1203 is provided on the limiting sealing ring 1201; the installation node 1103 is set on the installation column 1203; a strip steel frame 1102 is installed through the regulating pipe 8; an annular steel frame 1101 is installed inside the waste heat exchange ring 7; both the strip steel frame 1102 and the annular steel frame 1101 are fixed by the installation node 1103, forming a moving track that matches the shape of the waste heat utilization channel; the metal unblocking parts are slidably set on the moving track. The moving track formed by the strip steel frame 1102 and the annular steel frame 1101 matches the shape of the waste heat utilization channel, providing structural stability, heat conduction and support, and guidance for the sliding of the metal unblocking parts, thus fully unblocking the waste heat utilization channel.

[0041] It should be further explained that the metal drain cleaner includes a metal ball 1104; the metal ball 1104 is slidably sleeved on the strip steel frame 1102 / ring steel frame 1101, and is attracted by a magnetic component, moving synchronously along the strip steel frame 1102 / ring steel frame 1101, with drain spikes set on its outer periphery. As the mounting bracket 1004 rises, falls, and rotates, the electromagnet is energized, attracting the metal ball 1104 and causing it to move synchronously; the movement process is the draining process.

[0042] Example 5

[0043] The present invention further provides a waste heat utilization method including the above-mentioned waste heat utilization system, the steps of which are as follows:

[0044] S1. Pass the exhaust gas into the flue gas filter 1 for filtration to remove impurities and particles, so that it meets the emission standards.

[0045] S2. Flue gas enters the waste heat utilization box 2 and first enters the bottom of the waste heat utilization channel. It moves upward along the path. During this process, new flue gas continuously enters the waste heat utilization channel from the inlet valve 6 at different positions. The amount of gas entering can be adjusted to keep the flue gas temperature in the entire waste heat utilization channel stable.

[0046] S3, the internal flue gas flows through the waste heat exchange ring 7, and the external heat absorber flows through it, and heat exchange is achieved during the flow of the two;

[0047] S4. During the heat exchange process, the insulation cylinder 1001 moves up and down and rotates. The insulation component absorbs heat from the high-temperature area and transfers it to the low-temperature area to achieve temperature balance. The magnetic component attracts the metal unblocking component to move synchronously on the strip steel frame 1102 / ring steel frame 1101 to achieve the purpose of unblocking the waste heat utilization channel.

[0048] S5. The flue gas after heat exchange is condensed by condenser 3 and then discharged.

[0049] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A waste heat recovery system, comprising a flue gas filter (1), a waste heat recovery box (2), and a condenser (3) connected in sequence; characterized in that, The waste heat recovery box (2) is equipped with an inlet pipe (4), an outlet pipe (5), and a lifting drive box (9), and also includes: The waste heat exchange ring (7) is located inside the waste heat utilization box (2). Multiple sets of waste heat exchange rings (7) are coaxially arranged along the height direction of the waste heat utilization box (2). The inside is for flue gas circulation, and the outside is for heat absorber circulation. The regulating pipe (8) connects the adjacent waste heat exchange ring (7) and is also connected to the flue gas filter (1). It is used to regulate the position and flow rate of the flue gas entering the waste heat exchange ring (7). By connecting all the waste heat exchange rings (7) in series, a connected waste heat utilization channel is formed. A dredging component (11) that runs through the waste heat utilization channel is provided on the dredging component (11) and a metal dredging part that moves along the waste heat utilization channel is provided on the dredging component (11); And a magnetic heat-insulating component (10) that moves up and down by being driven by a lifting drive box (9). The magnetic heat-insulating component (10) is equipped with heat-insulating parts and magnetic parts. The magnetic heat-insulating component (10) passes through the center of the waste heat exchange ring (7) in sequence by lifting. During this process, on the one hand, the heat-insulating parts balance the heat absorption agent above and below, and on the other hand, the magnetic parts cooperate with the metal unblocking parts to move and unblock the waste heat utilization channel. The magnetic heat-insulating component (10) includes a traction rope (1003); the upper end of the traction rope (1003) is connected to the lifting drive end of the lifting drive box (9), and the lower end is connected to the rotary drive box (1002); a heat-insulating cylinder (1001) is provided on the rotary drive end of the rotary drive box (1002); the heat-insulating cylinder (1001) has a cover, a leakage hole is provided on the side wall, and the heat-insulating component inside is a number of pebbles of uniform size and shape, and a mounting frame (1004) is provided on the outer periphery; a magnetic component is provided on the mounting frame (1004); The unblocking component (11) includes an installation node (1103); an installation column (1203) is provided on the limiting sealing ring (1201); the installation node (1103) is provided on the installation column (1203); a strip steel frame (1102) is installed through the regulating pipe (8); an annular steel frame (1101) is installed inside the waste heat exchange ring (7); the strip steel frame (1102) and the annular steel frame (1101) are both fixed by the installation node (1103) to form a moving track that matches the shape of the waste heat utilization channel; the metal unblocking parts are slidably installed on the moving track; The metal drain cleaner includes a metal ball (1104); the metal ball (1104) is slidably sleeved on the strip steel frame (1102) / ring steel frame (1101), attracted by a magnetic attraction component, and moves synchronously along the strip steel frame (1102) / ring steel frame (1101), with drain spikes set on the outer periphery.

2. The waste heat utilization system according to claim 1, characterized in that, The mounting bracket (1004) is ring-shaped and surrounds the side wall of the insulation cylinder (1001); the magnetic components are electromagnets, which are arranged in front, behind, left and right of the mounting bracket (1004).

3. The waste heat utilization system according to claim 2, characterized in that, Each adjacent waste heat exchange ring (7) is provided with a ventilation sleeve (12) in a corresponding position; a limiting sealing ring (1201) is provided inside the ventilation sleeve (12); the two ends of the regulating pipe (8) extend into the ventilation sleeve (12) on the corresponding side, abut against the limiting sealing ring (1201), and are fixed by screws (1202); the middle part of the regulating pipe (8) is fitted with an air inlet sleeve (801); an air inlet valve (6) is provided on the air inlet sleeve (801); the air inlet valve (6) connects the flue gas filter (1) and the waste heat utilization channel.

4. A method for utilizing waste heat including the waste heat utilization system of claim 3, characterized in that, The steps are as follows: S1. Pass the exhaust gas into the flue gas filter (1) for filtration to remove impurities and particles so that it meets the emission standards. S2. Flue gas enters the waste heat utilization box (2) and first enters the bottom of the waste heat utilization channel. It moves upward along its path. During this process, new flue gas continuously enters the waste heat utilization channel from the inlet valve (6) at different positions. The amount of gas entering can be adjusted so that the flue gas temperature in the entire waste heat utilization channel is stable. S3, waste heat exchange ring (7) internal flue gas flows, external heat absorber flows, and heat exchange is achieved during the flow of the two; S4. During the heat exchange process, the insulation cylinder (1001) moves up and down and rotates. The insulation component absorbs the heat from the high temperature area and transfers it to the low temperature area to achieve temperature balance. The magnetic component attracts the metal unblocking component to move synchronously on the strip steel frame (1102) / ring steel frame (1101) to achieve the purpose of unblocking the waste heat utilization channel. S5. The flue gas after heat exchange is condensed by the condenser (3) and then discharged.

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