Waste heat cascade utilization and recovery device of regenerative exhaust gas incinerator

Abstract

The utility model discloses a kind of waste heat cascade utilization and recovery device of regenerative exhaust gas incinerator, it is related to waste heat cascade utilization technical field, including base, the upside of base is fixedly connected with vertical seat, heat-electricity conversion mechanism is installed to the outside of vertical seat, purification mechanism is installed between two groups of fixed plate, the top of vertical seat is fixedly connected with water tank, through hole is opened between water tank and vertical seat, the upside of through hole is fixedly connected with heat pipe, the bottom of water tank is fixedly connected with fixed base, the downside of fixed base is opened with air guide groove, air guide groove is opened with ventilation groove between through hole, the upside of water tank is opened with several groups of array arrangement exhaust hole. The device directly converts waste heat into electric energy by combining heat-electricity conversion and active refrigeration piece to maintain efficient temperature difference power generation, and then air guide groove strengthens the heating of water by low-temperature waste heat, realizes heat energy cascade recovery, and finally exhaust gas is discharged after deep purification by three layers of filling materials with different functions, achieving the dual goals of energy saving and environmental protection.

Description

Technical Field

[0001] This utility model relates to the field of waste heat cascade utilization technology, specifically to a waste heat cascade utilization and recovery device for a regenerative waste gas incinerator. Background Technology

[0002] In the field of industrial waste gas treatment, regenerative thermal oxidizers (RTOs) are widely used due to their high waste gas treatment efficiency. The large amount of high-temperature flue gas generated during their operation contains considerable waste heat resources. Recovering and utilizing this waste heat is a key step in improving the overall energy efficiency of the process and reducing carbon emissions. Currently, common waste heat utilization methods in the industry include installing heat exchangers to produce hot water or steam, and using more complex organic Rankine cycle systems for power generation. These technologies are constantly being developed and optimized.

[0003] Currently, there is a type of waste gas treatment device that integrates heat recovery and purification functions. For example, a known technical solution sets up a heat exchange unit and a filter unit in sequence in the flue, uses the waste heat of the flue gas to heat the water flow, and uses single or multi-layer filter media to adsorb and purify the cooled waste gas before discharge. In this solution, the heated water flow is usually transported by simple liquid level difference or start-stop control, which makes it difficult to achieve on-demand and precise flow regulation.

[0004] However, the aforementioned existing technologies have some shortcomings in practical applications. First, a single heat exchanger or power generation system cannot achieve the tiered utilization of heat energy according to quality, resulting in high-grade heat energy being downgraded and used without being efficiently converted. Second, conventional thermoelectric power generation modules are limited by the cold end heat dissipation efficiency, making it difficult to maintain a stable and sufficient temperature difference, resulting in low power generation efficiency. Furthermore, if the waste gas purification section has insufficient filtration layers or the materials have limited functionality, it may lead to incomplete purification. In addition, the device lacks precise control over the hot water supply, which cannot meet the dynamic requirements of the incinerator process, affecting the overall efficiency and stability of waste heat recovery.

[0005] Based on this, this utility model designs a waste heat cascade utilization and recovery device for a regenerative waste gas incinerator to solve the above problems. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the existing technology, this utility model provides a waste heat cascade utilization and recovery device for a regenerative waste gas incinerator.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A waste heat cascade utilization and recovery device for a regenerative thermal flammable gas incinerator includes a base, a thermoelectric conversion mechanism, and a purification mechanism. A support is fixedly connected to the upper side of the base. The thermoelectric conversion mechanism is installed outside the support. Two sets of vertically arranged fixing plates are fixedly connected to the inner side of the support, with the two sets of fixing plates located above the thermoelectric conversion mechanism. Each set of fixing plates has a groove on its outer side, and a mesh is fixedly connected inside the groove. The purification mechanism is installed between the two sets of fixing plates. A water tank is fixedly connected to the top of the support. A through hole is formed between the water tank and the support. A heat-conducting pipe is fixedly connected to the upper side of the through hole. A fixed base is fixedly connected to the bottom of the water tank. An air guide groove is formed on the lower side of the fixed base, and the air guide groove has a groove structure with a wider opening at the bottom and a narrower opening at the top. A ventilation slot is formed between the air guide groove and the through hole. Several sets of exhaust holes are arranged in an array on the upper side of the water tank.

[0009] Furthermore, the base and the stand are connected, and a vent pipe is fixedly connected to the outside of the base.

[0010] Furthermore, the thermoelectric conversion mechanism includes a thermoelectric module, a thermoelectric generator, and a thermoelectric cooler. The thermoelectric module is fixedly connected to the outer wall of the stand. The thermoelectric generator is detachably connected to one side of the thermoelectric module and is located inside the stand. The thermoelectric cooler is fixedly connected to the external cold end of the thermoelectric module.

[0011] Furthermore, a fixing frame is fixedly connected to the outside of the stand, and a storage battery is fixedly connected to the outside of the fixing frame. The storage battery is electrically connected to the thermoelectric module through a wire, and an inverter is fixedly connected to the outside of the storage battery.

[0012] Furthermore, the purification mechanism includes a coarse interception layer, a fine filtration layer, and a chemical adsorption layer. The coarse interception layer, the fine filtration layer, and the chemical adsorption layer are installed sequentially from bottom to top in the area between the two sets of fixed plates. The coarse interception layer is filled with porous ceramic ball material, the fine filtration layer is filled with sintered powder material, and the chemical adsorption layer is filled with activated carbon material.

[0013] Furthermore, a water supply pipe is fixedly connected to one side of the water tank, and a drain pipe is fixedly connected to the other side of the water tank. A water pump is fixedly connected inside the water tank, and the drain pipe is fixedly connected to the water pump.

[0014] Furthermore, a water level sensor and a water temperature sensor are fixedly connected inside the water tank. Furthermore,

[0015] A PLC processor is fixedly connected to the outside of the stand.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. The waste heat cascade utilization and recovery device of the regenerative waste gas incinerator, by combining thermoelectric conversion with active cooling, significantly increases the temperature difference on both sides of the thermoelectric power generation module, thereby effectively improving the efficiency of directly converting high-temperature flue gas heat energy into electrical energy. The generated electrical energy can be directly used for plant equipment, realizing high-value recovery of high-grade heat energy and reducing external power demand.

[0017] 2. The waste heat cascade utilization and recovery device of this regenerative waste gas incinerator utilizes a unique air guiding structure to enhance the heat exchange between medium and low temperature flue gas and water, successfully converting the residual heat energy into hot water for reuse in the process. Combined with three layers of filter materials with different functions, the waste gas is deeply purified, ultimately realizing the cascade utilization of energy and the synergistic treatment of pollutants, achieving both energy saving and environmental protection benefits. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a perspective view of a waste heat cascade utilization and recovery device for a regenerative waste gas incinerator according to the present invention.

[0020] Figure 2 This is a second perspective view of the present invention;

[0021] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0022] Figure 4 This is a partial front sectional view of the present invention;

[0023] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0024] Figure 6 for Figure 4 Enlarged view of point C in the middle;

[0025] Figure 7 for Figure 4 A magnified view of a portion of the image.

[0026] The labels in the diagram represent:

[0027] 1. Base; 2. Stand; 3. Vent pipe; 4. Thermoelectric module; 5. Thermoelectric generator; 6. Semiconductor refrigeration chip; 7. Mounting bracket; 8. Battery; 9. Inverter; 10. Mounting plate; 11. Partition mesh; 12. Coarse interception layer; 13. Fine filter layer; 14. Chemical adsorption layer; 15. Water tank; 16. Through hole; 17. Heat pipe; 18. Mounting bracket; 19. Air guide duct; 20. Ventilation duct; 21. Exhaust vent; 22. Water supply pipe; 23. Water pump; 24. Drain pipe; 25. Water level sensor; 26. Water temperature sensor; 27. PLC processor. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0029] Example 1: In some embodiments, please refer to the accompanying drawings. Figures 1-7 A waste heat cascade utilization and recovery device for a regenerative waste gas incinerator includes a base 1, which serves as the supporting foundation for the entire device. Its stable structure ensures the smooth operation of the equipment. A support 2 is fixedly connected to the upper side of the base 1. The support 2 forms the main channel for flue gas to rise and be treated. Its internal space provides a place for heat exchange and purification. The base 1 and the support 2 are connected to each other, ensuring that the flue gas can smoothly enter the interior of the support 2 from the base 1. A vent pipe 3 is fixedly connected to the outside of the base 1. The vent pipe 3 serves as the inlet for the high-temperature flue gas of the incinerator, introducing the heat source to be treated into the beginning of the device.

[0030] The thermoelectric conversion mechanism is installed on the outside of the support 2 to directly convert the heat energy in the flue gas into electrical energy. The thermoelectric conversion mechanism includes a thermoelectric module 4, a thermoelectric generator 5, and a thermoelectric cooler 6. The thermoelectric module 4 is the core unit of energy conversion, fixedly connected to the outer wall of the support 2 to directly sense the wall temperature. The thermoelectric generator 5 is detachably connected to one side of the thermoelectric module 4 and is located inside the support 2. The thermoelectric generator 5 is directly exposed to the flue gas environment to maximize heat absorption and is a key component for realizing the Seebeck effect. The thermoelectric cooler 6 is fixedly connected to the external cooling system of the thermoelectric module 4. At the end, the semiconductor cooling chip 6 powerfully reduces the cold end temperature of the thermoelectric module 4 through active cooling, thereby establishing and maintaining the huge temperature difference required for power generation. A fixing frame 7 is fixedly connected to the outside of the stand 2. The fixing frame 7 provides a stable installation platform for electrical equipment. A storage battery 8 is fixedly connected to the outside of the fixing frame 7, and the storage battery 8 is electrically connected to the thermoelectric module 4 through electrical wires. The storage battery 8 is used to store the electrical energy generated by thermoelectric power generation. An inverter 9 is fixedly connected to the outside of the storage battery 8. The inverter 9 is responsible for converting the DC power in the storage battery 8 into AC power to meet the power needs of conventional equipment.

[0031] Two sets of vertically arranged fixing plates 10 are fixedly connected to the inner side of the support 2. The fixing plates 10 serve as the supporting skeleton of the internal structure, and the two sets of fixing plates 10 are located above the thermoelectric conversion mechanism, reserving installation space for the subsequent purification mechanism. Each set of fixing plates 10 has a groove on its exterior, and a partition net 11 is fixedly connected inside the groove. The partition net 11 is used to support the filled purification material and prevent it from falling off. The purification mechanism is installed between the two sets of fixing plates 10 and is used to perform multi-stage purification treatment on the flue gas after heat recovery. The purification mechanism includes a coarse interception layer 12, a fine filter layer 13, and a chemical adsorption layer 14. The coarse interception layer 12... 2. The fine filter layer 13 and the chemical adsorption layer 14 are installed sequentially from bottom to top in the area between the two sets of fixed plates 10, forming a gradient purification path from coarse to fine. The coarse interception layer 12 is filled with porous ceramic ball material. The coarse interception layer 12 mainly intercepts larger particles in the flue gas through collision and diffusion. The fine filter layer 13 is filled with sintered powder material. The fine filter layer 13 can efficiently capture fine dust and aerosols. The chemical adsorption layer 14 is filled with activated carbon material. The chemical adsorption layer 14 adsorbs and removes harmful gas molecules and odors through its huge specific surface area and chemical activity.

[0032] A water tank 15 is fixedly connected to the top of the support 2. The water tank 15 is used to store heated water and serves as the terminal for secondary waste heat recovery. A through hole 16 is provided between the water tank 15 and the support 2, providing a channel for flue gas to enter the upper area. A heat-conducting pipe 17 is fixedly connected to the upper side of the through hole 16. The heat-conducting pipe 17 is immersed in the water in the water tank 15, and its high thermal conductivity ensures that the waste heat of the flue gas can be efficiently transferred to the water. A fixing seat 18 is fixedly connected to the bottom of the water tank 15. The fixing seat 18 is used to support and fix the lower structure. A guide trough 19 is provided on the lower side of the 18, and the guide trough 19 is a groove structure with a wide opening at the lower end and a narrow opening at the upper end. The guide trough 19 uses the Venturi effect to accelerate the flow of flue gas, thereby enhancing its impact on the heat pipe 17 and the heat exchange efficiency. A ventilation groove 20 is provided between the guide trough 19 and the through hole 16. The ventilation groove 20 guides the accelerated flue gas to the area of ​​the heat pipe 17. Several sets of exhaust holes 21 are arranged in an array on the upper side of the water tank 15. The exhaust holes 21 are used to safely discharge the clean exhaust gas after comprehensive treatment and heat recovery into the atmosphere.

[0033] A water supply pipe 22 is fixedly connected to one side of the water tank 15. The water supply pipe 22 is responsible for replenishing cold water into the water tank 15. A drain pipe 24 is fixedly connected to the other side of the water tank 15. The drain pipe 24 is used to transport heated hot water to the point of use. A water pump 23 is fixedly connected inside the water tank 15. The drain pipe 24 and the water pump 23 are fixedly connected. The water pump 23 provides power for the hot water delivery and can achieve precise flow control. A water level sensor 25 and a water temperature sensor 26 are fixedly connected inside the water tank 15. The water level sensor 25 is used to monitor the liquid level in the water tank 15 in real time to prevent dry burning or overflow. The water temperature sensor 26 is used to detect the water temperature and provide data for intelligent control.

[0034] A PLC processor 27 is fixedly connected to the outside of the stand 2. The PLC processor 27 serves as the intelligent control center of the entire device, receiving signals from various sensors and coordinating actions such as thermoelectric conversion and the operation of the water pump 23 to achieve automated and efficient operation.

[0035] In this embodiment, when the high-temperature flue gas generated by the incinerator enters the stand 2 through the base 1 and the vent pipe 3, the thermoelectric module 4 and the thermoelectric generator 5 installed on its inner wall are directly exposed to the heat flow. The hot end of the thermoelectric generator 5 quickly absorbs the heat of the flue gas. At this time, the semiconductor cooling chip 6 on the cold end of the thermoelectric module 4 starts to work, forcibly cooling the cold end, thereby establishing and maintaining a significant temperature difference on both sides of the thermoelectric module 4. This temperature difference is the key to Seebeck effect power generation. The larger the temperature difference, the higher the power generation efficiency. With the assistance of the semiconductor cooling chip 6, the thermoelectric conversion efficiency is effectively guaranteed. The generated DC power is sent to the battery 8 for storage. Subsequently, the inverter 9 converts the DC power in the battery 8 into AC power, thereby powering other electrical equipment in the plant area, completing the first cascade utilization of high-grade thermal energy into high-value electrical energy.

[0036] After the thermoelectric conversion is completed, the temperature of the flue gas decreases, but it still carries a large amount of medium- and low-temperature heat. At this time, the flue gas continues to rise and enters the hot water preparation unit, which consists of components such as water tank 15, heat pipe 17, and fixed base 18. The flue gas enters the air guide duct 19 under the fixed base 18 through the ventilation slot 20. The air guide duct 19 adopts a unique structure with a wide opening at the lower end and a narrow opening at the upper end. This Venturi effect design can accelerate the flue gas flow rate and reduce the pressure, so that it can more concentratedly and efficiently impact and flow through the heat pipe 17 immersed in the water tank 15. The heat pipe 17 quickly conducts the waste heat in the flue gas to the water in the water tank 15, heating it. The hot water can be transported to the incinerator system through the water pump 23 and the drain pipe 24 as process water or combustion air preheating source, realizing the internal circulation and reuse of waste heat. On the other hand, the water level sensor 25 and the water temperature sensor 26 monitor the status of the water tank 15 in real time, and the entire system is intelligently controlled by the PLC processor 27 to ensure stable operation. This is the second stage of utilization of medium- and low-temperature waste heat.

[0037] Finally, before being discharged, the waste gas after heat recovery must undergo deep treatment by the purification mechanism. The waste gas passes upward through three layers of filling material. First, it passes through the coarse interception layer 12, whose porous ceramic ball structure can diffuse the airflow and intercept larger particles. Then, it passes through the fine filter layer 13, whose sintered powder material can effectively capture fine dust and aerosols. Finally, it reaches the chemical adsorption layer 14, where the activated carbon material removes residual harmful gases and odors through adsorption. The purified clean gas is finally discharged through the exhaust port 21 at the top of the water tank 15 in compliance with standards. This multi-stage purification process ensures the environmental benefits of the device, making it energy-saving while having excellent environmental performance.

[0038] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A waste heat cascade utilization and recovery device for a regenerative waste gas incinerator, comprising a base (1), characterized in that: It also includes a thermoelectric conversion mechanism and a purification mechanism. A stand (2) is fixedly connected to the upper side of the base (1). The thermoelectric conversion mechanism is installed on the outside of the stand (2). Two sets of vertically arranged fixing plates (10) are fixedly connected to the inner side of the stand (2), and the two sets of fixing plates (10) are located above the thermoelectric conversion mechanism. A groove is opened on the outside of each of the two sets of fixing plates (10), and a mesh (11) is fixedly connected inside the groove. The purification mechanism is installed between the two sets of fixing plates (10). A [missing information - likely a device or structure] is fixedly connected to the top of the stand (2). A water tank (15) is provided with a through hole (16) between the water tank (15) and the stand (2). A heat conduction pipe (17) is fixedly connected to the upper side of the through hole (16). A fixed base (18) is fixedly connected to the bottom of the water tank (15). An air guide groove (19) is provided on the lower side of the fixed base (18). The air guide groove (19) is a groove structure with a wide opening at the lower end and a narrow opening at the upper end. A ventilation groove (20) is provided between the air guide groove (19) and the through hole (16). Several sets of exhaust holes (21) are arranged in an array on the upper side of the water tank (15).

2. The waste heat cascade utilization and recovery device for a regenerative waste gas incinerator according to claim 1, characterized in that, The base (1) and the stand (2) are connected, and a vent pipe (3) is fixedly connected to the outside of the base (1).

3. The waste heat cascade utilization and recovery device for a regenerative waste gas incinerator according to claim 1, characterized in that, The thermoelectric conversion mechanism includes a thermoelectric module (4), a thermoelectric generator (5), and a thermoelectric cooler (6). The thermoelectric module (4) is fixedly connected to the outer wall of the stand (2). The thermoelectric generator (5) is detachably connected to one side of the thermoelectric module (4) and is located inside the stand (2). The thermoelectric cooler (6) is fixedly connected to the external cold end of the thermoelectric module (4).

4. The waste heat cascade utilization and recovery device for a regenerative waste gas incinerator according to claim 3, characterized in that, The stand (2) is externally fixedly connected to a fixing frame (7), and the fixing frame (7) is externally fixedly connected to a storage battery (8). The storage battery (8) is electrically connected to the thermoelectric module (4) through a wire. The storage battery (8) is externally fixedly connected to an inverter (9).

5. The waste heat cascade utilization and recovery device for a regenerative waste gas incinerator according to claim 1, characterized in that, The purification mechanism includes a coarse interception layer (12), a fine filtration layer (13), and a chemical adsorption layer (14). The coarse interception layer (12), the fine filtration layer (13), and the chemical adsorption layer (14) are installed sequentially from bottom to top in the area between the two sets of fixed plates (10). The coarse interception layer (12) is filled with porous ceramic ball material, the fine filtration layer (13) is filled with sintered powder material, and the chemical adsorption layer (14) is filled with activated carbon material.

6. The waste heat cascade utilization and recovery device for a regenerative waste gas incinerator according to claim 1, characterized in that, A water supply pipe (22) is fixedly connected to one side of the water tank (15), and a drain pipe (24) is fixedly connected to the other side of the water tank (15). A water pump (23) is fixedly connected inside the water tank (15), and the drain pipe (24) is fixedly connected to the water pump (23).

7. The waste heat cascade utilization and recovery device for a regenerative waste gas incinerator according to claim 1, characterized in that, The water tank (15) is fixedly connected to a water level sensor (25) and a water temperature sensor (26).

8. The waste heat cascade utilization and recovery device for a regenerative waste gas incinerator according to claim 1, characterized in that, The stand (2) is externally fixedly connected to a PLC processor (27).

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