A high-temperature exhaust gas treatment device with waste heat recovery

Abstract

The utility model belongs to waste gas treatment technical field, concretely relates to a kind of high-temperature waste gas treatment device of waste heat recovery, including incinerator body, and the surface of incinerator body export end is connected with connecting pipe, and the surface of connecting pipe other side is threadedly connected spiral finned tube, and the surface of spiral finned tube is connected in waste heat recovery tank inner wall, and the surface of waste heat recovery tank inner wall is welded with support frame, and the surface of support frame is threadedly connected with flow guide plate using bolt, and the surface of waste heat recovery tank inner wall is welded with clamping block, and the surface of clamping block is provided with clamping groove, and the surface of clamping groove is clamped with rubber head of hanging rod side edge plug-in hanging rod. The utility model, by the cooperation of connecting pipe and spiral finned tube connected in the export end of incinerator body, heat is recovered in waste heat recovery tank, then the clothes of suspended work clothes are divided using hanging rod and hanging ring in waste heat recovery tank, and then waste heat recovery is carried out to high-temperature waste gas after heat accumulation incinerator body treatment, and energy loss is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of waste gas treatment technology, specifically relating to a high-temperature waste gas treatment device with waste heat recovery capability. Background Technology

[0002] High-temperature waste gas refers to gaseous mixtures containing specific components generated during industrial production, energy combustion, or waste treatment processes, accompanied by high temperatures (typically ≥150℃, and in some scenarios such as industrial kilns and regenerative thermal oxidizers (RTOs) outlets reaching 300-1200℃). Its sources are widespread, commonly found in chemical reactions, metal smelting, boiler combustion, and VOCs (volatile organic compounds) treatment. Examples include the 250-350℃ purified tail gas emitted after RTO treatment of organic waste gas, the 800-1000℃ dust-laden waste gas generated from blast furnace smelting in steel plants, and the 200-400℃ solvent-laden waste gas emitted from chemical plant reactors. Besides its high-temperature characteristics (which can serve as a potential heat source for waste heat recovery), this type of waste gas may also carry dust, acidic gases (such as HCl and SO2), unreacted organic matter, or toxic components.

[0003] High-temperature waste gas treatment devices are specialized equipment designed for high-temperature waste gases generated in industrial production. They integrate multiple functions, including cooling, purification, and waste heat recovery. Their core function is to systematically treat waste gases, eliminating pollutants while recovering the heat they carry, thus achieving both environmental compliance and efficient energy utilization. They are commonly found in industries such as chemical, metallurgy, coating, and energy. Typical devices include pretreatment units and core treatment units, such as regenerative thermal oxidizers (RTOs) for VOCs cracking and high-temperature denitrification devices for NOx removal.

[0004] Existing regenerative thermal oxidizers, after treating the volatile organic compounds in the waste gas, still discharge purified exhaust gas at a high temperature of 250-400℃. Direct discharge of this gas will result in a waste of heat, and long-term operation will cause huge energy losses. Utility Model Content

[0005] The purpose of this invention is to provide a high-temperature waste gas treatment device with waste heat recovery capability, which aims to solve the problem that existing regenerative incinerators, after treating volatile organic compounds in waste gas, still discharge purified tail gas at a high temperature of 250-400℃, which will cause heat waste when directly discharged and result in huge energy consumption in the long run.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-temperature waste gas treatment device with waste heat recovery capability, comprising an incinerator body, a connecting pipe connected to the outlet end surface of the incinerator body, a spiral finned tube threadedly connected to the other side surface of the connecting pipe, the spiral finned tube being connected to the inner wall of a waste heat recovery box, a support frame welded to the inner wall surface of the waste heat recovery box, a guide plate threadedly connected to the support frame surface by bolts, a locking block welded to the inner wall surface of the waste heat recovery box, a locking groove formed on the surface of the locking block, a rubber head on the side of a hanging rod engaging with the locking groove surface, a hanging ring welded to the bottom surface of the hanging rod, a slot formed at the top of the waste heat recovery box, a connecting ear inserted into the slot surface, the top surface of the connecting ear being connected to the bottom of a top cover, the sealing gasket surface at the bottom of the top cover being fitted and connected to the top opening of the waste heat recovery box, and the surface of the waste heat recovery box being threadedly connected to the connecting ear surface by screws.

[0007] As a preferred embodiment of the high-temperature waste gas treatment device with waste heat recovery according to this utility model, the spiral finned tube has a U-shaped integrated structure.

[0008] As a preferred embodiment of the high-temperature waste gas treatment device with waste heat recovery according to this utility model, the support frame is an "L"-shaped integrated structure, and two sets of the support frames are symmetrically distributed on the lower surface of the inner wall of the waste heat recovery box.

[0009] As a preferred embodiment of the high-temperature waste gas treatment device with waste heat recovery according to this utility model, the transverse end surface of the support frame is longitudinally provided with a threaded groove, the shape and size of which are adapted to the threaded through groove at the intersection of the guide plate.

[0010] As a preferred embodiment of the high-temperature waste gas treatment device with waste heat recovery according to this utility model, the three sets of the aforementioned blocks are distributed at equal intervals on the longitudinal end surface of the inner wall of the waste heat recovery box.

[0011] As a preferred embodiment of the high-temperature waste gas treatment device with waste heat recovery according to this utility model, the slot is a "U"-shaped groove, the shape and size of which are adapted to the circular rubber heads at both ends of the hanging rod.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] By connecting the connecting pipe and the spiral finned tube at the outlet end of the incinerator body, the heat is recovered in the waste heat recovery box. Then, the hanging rod and hanging ring in the waste heat recovery box are used to separate and hang the work clothes, which facilitates the recovery and reuse of waste heat from the high-temperature exhaust gas after the heat storage incinerator body is treated, thereby reducing energy consumption.

[0014] In addition, during use, the guide plate fixed on the support frame is used to evenly guide the heat of the spiral finned tube, avoiding local hot air concentration that could cause the work clothes to overheat or the corners to not dry thoroughly. This ensures that the work clothes and other garments hanging on the hanging rings are heated evenly. The hanging height of the work clothes can also be adjusted by locking the hanging rods onto the clips at different heights, thus adapting to the drying effect of work clothes of different lengths. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the exploded structure of the main cross-section of this utility model;

[0018] Figure 3 This is a side view of the exploded structure of this utility model;

[0019] Figure 4 This is an exploded structural diagram of the support frame and guide plate of this utility model.

[0020] In the diagram: 1. Incinerator body; 2. Connecting pipe; 3. Spiral finned tube; 4. Waste heat recovery box; 5. Support frame; 6. Bolt; 7. Guide plate; 8. Locking block; 9. Locking slot; 10. Hanging rod; 11. Hanging ring; 12. Slot; 13. Connecting ear; 14. Top cover; 15. Screw. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-4This utility model provides the following technical solution: a high-temperature waste gas treatment device with waste heat recovery capability, comprising an incinerator body 1, a connecting pipe 2 connected to the outlet end surface of the incinerator body 1, a spiral finned tube 3 threadedly connected to the other side surface of the connecting pipe 2, the spiral finned tube 3 being connected to the inner wall of a waste heat recovery box 4, a support frame 5 welded to the inner wall surface of the waste heat recovery box 4, a guide plate 7 threadedly connected to the support frame 5 using bolts 6, a locking block 8 welded to the inner wall surface of the waste heat recovery box 4, a locking groove 9 formed on the surface of the locking block 8, a rubber head on the side of a hanging rod 10 engaging with the surface of the locking groove 9, and a hanging rod 10 having a hanging end welded to the bottom surface of the hanging rod 10. Ring 11, slot 12 is opened on the top of waste heat recovery box 4, connecting ear 13 is inserted into the surface of slot 12, the top surface of connecting ear 13 is connected to the bottom of top cover 14, the bottom sealing gasket surface of top cover 14 is fitted and connected to the top opening end of waste heat recovery box 4, and the surface of waste heat recovery box 4 is threaded to the surface of connecting ear 13 by screw 15. In this design scheme, the incinerator body 1 is the main body of regenerative incinerator, and a large number of related components are set in the incinerator body 1. Since they are existing technologies and the core content of this technical solution is not related to them, they will not be described in detail in this technical solution.

[0023] In operation: The incinerator body 1 achieves efficient decomposition of volatile organic compounds (VOCs) and recycling of heat in the waste gas by periodically switching the airflow direction. The specific process can be summarized as follows: High-temperature waste gas (containing VOCs, temperature usually 100-400℃) first enters the heat storage chamber of the RTO and exchanges heat with the heat storage medium (mostly ceramic filler, which has previously stored heat). The waste gas is rapidly heated to 800-1200℃ (without the need to consume a large amount of additional fuel). Subsequently, the waste gas that has reached the oxidation temperature enters the combustion chamber. With the assistance of combustion air, the VOCs in it are completely oxidized and decomposed into harmless CO2 and H2O. The heat released during the oxidation process further maintains the high temperature of the combustion chamber. The high-temperature tail gas (temperature about 800-1000℃) that has completed purification and heat release enters another set of cold heat storage chambers, transfers heat to the heat storage medium (for the next round of heat exchange and energy storage), and is discharged after its own temperature drops to 250-400℃.

[0024] Preferably, the spiral finned tube 3 has a U-shaped integrated structure.

[0025] In practical use, the "U"-shaped structure of the spiral finned tube 3 can extend the flow path of high-temperature exhaust gas in the longitudinal space of the waste heat recovery box 4, allowing the exhaust gas to contact the spiral finned tube 3 for a longer time, and the heat can be more fully transferred to the drying area in the waste heat recovery box 4 through the spiral finned tube 3.

[0026] Preferably, the support frame 5 is an L-shaped integrated structure, and two sets of support frames 5 are symmetrically distributed on the lower surface of the inner wall of the waste heat recovery box 4.

[0027] In practical use, the rectangular cavity on the surface of the support frame 5 facilitates the fitting and fixing of the guide plate 7 in the waste heat recovery box 4, thereby uniformly guiding the heat on the spiral finned tube 3.

[0028] Preferably, the transverse end surface of the support bracket 5 has a longitudinally threaded groove, the shape and size of which are adapted to the threaded through groove at the intersection of the guide plate 7.

[0029] In practical use, the threaded grooves on the surfaces of the support frame 5 and the guide plate 7 are used to facilitate the connection between the two using bolts 6, thereby fixing the position of the guide plate 7 inside the waste heat recovery box 4.

[0030] Preferably, three sets of card blocks 8 are evenly distributed on the longitudinal end surface of the inner wall of the waste heat recovery box 4.

[0031] In practical use, multiple sets of locking blocks 8 are welded to the inner wall of the waste heat recovery box 4. The slots 9 on the locking blocks 8 can engage the high-temperature resistant rubber heads on the side of the hanging rod 10. By engaging the hanging rod 10 into the slots 9 at different heights, the height of the hanging rod 10 can be flexibly adjusted.

[0032] Preferably, the slot 9 is a "U" shaped groove, the shape and size of which are adapted to the round rubber heads at both ends of the hanging rod 10.

[0033] In practical use, the slot 9 on the surface of the card block 8 is used to insert and fix the hanging rod 10, so as to conveniently hang the work clothes that need to be dried on the upper part of the inner wall of the waste heat recovery box 4.

[0034] Working principle: After the incinerator body 1 processes the high-temperature waste gas, the resulting purified tail gas, which still contains residual heat and has a temperature of 250-400℃, is transported to the spiral finned tube 3 via the connecting pipe 2 at the outlet end of the incinerator body 1. The spiral finned tube 3 is connected to the connecting pipe 2 and is fixed to the inner wall of the waste heat recovery box 4. When the tail gas flows through the spiral finned tube 3, the heat is dissipated into the interior of the waste heat recovery box 4 through the spiral finned tube 3. To ensure uniform heat distribution, a support frame 5 is welded to the inner wall of the waste heat recovery box 4. A guide plate 7 is fixed by bolts 6. Circular grooves are evenly spaced on the surface of the guide plate 7. These grooves guide the hot air emitted by the bottom spiral finned tube 3 to flow through the circular grooves on the surface of the guide plate 7 and evenly cover the space inside the waste heat recovery box 4, avoiding uneven heating in certain areas. At the same time, multiple sets of locking blocks 8 are welded to the inner wall of the waste heat recovery box 4. The locking slots 9 on the locking blocks 8 can engage the high-temperature resistant rubber heads on the side of the hanging rod 10. By engaging the hanging rod 10 into the locking slots 9 at different heights, the height of the hanging rod 10 can be flexibly adjusted.

[0035] The hanging ring 11 welded to the bottom of the hanging rod 10 is used to hang the work clothes to be dried. The height of the hanging rod 10 can be adjusted to accommodate different lengths of work clothes and control the distance between the work clothes and the spiral finned tube 3 to ensure that the work clothes are dried efficiently and evenly. In addition, the top of the waste heat recovery box 4 is precisely aligned and fixed to the bottom of the top cover 14 via the slot 12 and the connecting ear 13. At the same time, the high-temperature resistant rubber sealing gasket glued to the bottom of the top cover 14 is fitted into the opening end of the top of the waste heat recovery box 4, and the sealing gasket at the bottom of the top cover 14 fits into the opening end of the top of the box. After sealing, use screws 15 to fix connecting lugs 13 to the waste heat recovery box 4. When tightening screws 15, it is necessary to operate in a "diagonal order" step by step, such as the four screws in the order of "upper left → lower right → upper right → lower left". The tightening torque of each step should be controlled at 15-20 N·m to avoid the top cover 14 warping due to excessive tightening of screws 15 on one side. Screws 15 are made of high temperature resistant stainless steel, which may damage the sealing and contact surface between the top cover 14 and the waste heat recovery box 4, ensuring that the heat inside the waste heat recovery box 4 is not easily lost, and further improving the drying effect.

[0036] The surfaces of screw 15 and hanging rod 10 can be sprayed with a "polytetrafluoroethylene anti-corrosion coating" (thickness 30-50μm) to prevent acidic gases from causing the parts to rust and thus contaminating work clothes.

[0037] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high-temperature waste gas treatment device with waste heat recovery capability, comprising an incinerator body (1), characterized in that: The incinerator body (1) has a connecting pipe (2) connected to its outlet end surface. A spiral finned tube (3) is threaded onto the other side of the connecting pipe (2). The spiral finned tube (3) is connected to the inner wall of the waste heat recovery box (4). A support frame (5) is welded to the inner wall of the waste heat recovery box (4). A guide plate (7) is threaded onto the support frame (5) using bolts (6). A locking block (8) is welded to the inner wall of the waste heat recovery box (4). A slot (9) is formed on the surface of the locking block (8). The rubber head of the hanging rod (10) is inserted into the surface of the hanging rod (10). The hanging ring (11) is welded to the bottom surface of the hanging rod (10). The slot (12) is opened on the top of the waste heat recovery box (4). The connecting ear (13) is inserted into the surface of the slot (12). The top surface of the connecting ear (13) is connected to the bottom of the top cover (14). The sealing gasket surface of the bottom of the top cover (14) is fitted and connected to the top opening end of the waste heat recovery box (4). The surface of the waste heat recovery box (4) is threaded to the surface of the connecting ear (13) using a screw (15).

2. The high-temperature waste gas treatment device with waste heat recovery capability according to claim 1, characterized in that: The spiral finned tube (3) has a U-shaped integrated structure.

3. The high-temperature waste gas treatment device with waste heat recovery capability according to claim 1, characterized in that: The support frame (5) is an "L" shaped integrated structure, and the two sets of support frames (5) are symmetrically distributed on the lower surface of the inner wall of the waste heat recovery box (4).

4. The high-temperature waste gas treatment device with waste heat recovery capability according to claim 3, characterized in that: The support frame (5) has a longitudinally threaded groove on its transverse end surface, and its shape and size are adapted to the threaded through groove at the intersection with the guide plate (7).

5. A high-temperature waste gas treatment device with waste heat recovery capability according to claim 1, characterized in that: The three sets of card blocks (8) are evenly distributed on the longitudinal end surface of the inner wall of the waste heat recovery box (4).

6. The high-temperature waste gas treatment device with waste heat recovery capability according to claim 1, characterized in that: The slot (9) is a "U" shaped groove, the shape and size of which are adapted to the round rubber heads at both ends of the hanging rod (10).

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