Tail gas purification and waste heat recovery integrated device

Abstract

The utility model relates to bitumen processing environmental protection equipment technical field, concretely relates to tail gas purification and waste heat recovery integration device, including the conveying pipeline, the gas outlet of conveying pipeline is provided with first filter drum, and the air inlet of conveying pipeline is provided with the induced draft fan, and the metal filter screen is provided in first filter drum, and one side of first filter drum is provided with second filter drum, and the glass fibre filter screen is provided in second filter drum, and first filter drum and second filter drum are linked through the lead -through pipe intercommunication, and one side of second filter drum is provided with the spray processing tower, and second filter drum and spray processing tower are linked through the main pipe intercommunication, and one side of spray processing tower is provided with ultraviolet light oxidation reactor and activated carbon adsorption tower, and the spiral heat exchange pipe is provided in conveying pipeline, and the net pipe is fixedly installed at the air outlet of activated carbon adsorption tower. The utility model has efficient tail gas treatment and heat recycling function, and meets the requirement of energy -conserving and emission -reducing.

Description

Technical Field

[0001] This utility model relates to the field of environmental protection equipment for asphalt processing, and more specifically, to an integrated device for exhaust gas purification and waste heat recovery. Background Technology

[0002] During the asphalt modification production process, a large amount of exhaust gas is generated due to operations such as heating the asphalt and mixing it with modifiers. This exhaust gas has a complex composition, containing a variety of harmful substances such as asphalt fumes, benzo[a]pyrene, sulfur oxides, nitrogen oxides, and volatile organic compounds. If it is directly emitted into the atmosphere, it will cause serious environmental pollution and harm human health. At the same time, the exhaust gas carries a large amount of residual heat, which is usually at a high temperature. If this heat is not recovered and utilized, it will cause serious energy waste and does not meet the requirements of energy conservation and emission reduction.

[0003] Currently, the treatment of asphalt modification exhaust gas often employs single purification equipment, such as spray towers and activated carbon adsorption devices. These devices offer limited treatment methods and frequently suffer from poor purification effects and incomplete treatment, failing to meet increasingly stringent environmental standards. Furthermore, waste heat recovery from the exhaust gas is typically handled by separate waste heat recovery equipment, operating independently from the exhaust gas purification system. This results in large equipment footprints, low integration, cumbersome operation, and low waste heat recovery efficiency and energy utilization. Therefore, we propose an integrated exhaust gas purification and waste heat recovery device. Utility Model Content

[0004] The purpose of this invention is to provide an integrated device for exhaust gas purification and waste heat recovery to address the deficiencies mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An integrated exhaust gas purification and waste heat recovery device includes a conveying pipeline. A first filter cartridge is installed at the outlet end of the conveying pipeline, and an induced draft fan is installed at the inlet end. A metal filter screen is installed inside the first filter cartridge. A second filter cartridge, containing a glass fiber filter screen, is installed on one side of the first filter cartridge. The first and second filter cartridges are connected by a connecting pipe. A spray treatment tower is installed on one side of the second filter cartridge, and the second filter cartridge is connected to the spray treatment tower via a main pipe. An ultraviolet oxidation reactor and an activated carbon adsorption tower for waste gas treatment are installed on one side of the spray treatment tower. The spray treatment tower and the ultraviolet oxidation reactor, and the ultraviolet oxidation reactor and the activated carbon adsorption tower, are connected by pipes. A spiral heat exchanger tube for heat exchange is installed inside the conveying pipeline, and a purified pipe is fixedly installed at the outlet end of the activated carbon adsorption tower.

[0007] Preferably, the spiral heat exchange tube is spiral in shape, and an inlet pipe is fixedly installed at the inlet end of the spiral heat exchange tube, extending out of the conveying pipe, and an outlet pipe is fixedly installed at the outlet end of the spiral heat exchange tube, extending out of the conveying pipe.

[0008] This feature allows water to be introduced for heat exchange, and the water after heat exchange can be supplied to the outside.

[0009] Preferably, an air inlet hood is fixedly installed at the air inlet end of the conveying pipeline, and the air inlet hood is connected to the exhaust gas outlet of the asphalt modification equipment.

[0010] This setting enables the normal collection of exhaust gases.

[0011] Preferably, the induced draft fan is fixedly installed at the end of the air inlet hood, and the conveying pipe is inclined downward at 45°~60°;

[0012] This setup allows the exhaust fan to be supported and installed using the air intake hood. At the same time, the inclined design of the conveying pipe also helps impurities in the exhaust gas to settle down along the conveying pipe.

[0013] Preferably, a discharge pipe is fixedly installed at the bottom end of both the first filter cylinder and the second filter cylinder, and a discharge valve is fixedly installed on the discharge pipe.

[0014] This feature facilitates the downward discharge of impurities from the cylinder.

[0015] Preferably, the cross-sections of the metal filter and the glass fiber filter are both serrated, the spray treatment tower is connected to the ultraviolet oxidation reactor through a gas pipe, and the ultraviolet oxidation reactor is connected to the activated carbon adsorption tower through a corrosion-resistant pipe.

[0016] This setting helps to increase the filtration area of ​​metal and glass fiber filters, making the filtration process smoother.

[0017] Preferably, an ozone generator is fixedly installed on the ultraviolet oxidation reactor, and an ultraviolet lamp is fixedly installed on the inner wall of the ultraviolet oxidation reactor.

[0018] Preferably, a plurality of guide plates for guiding the flow of waste gas are fixedly installed on the inner wall of the ultraviolet oxidation reactor, and the outlet end of the ozone generator is connected to the interior of the ultraviolet oxidation reactor.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] 1. This utility model, by setting a spiral heat exchange tube in the conveying pipeline, can fully recover the waste heat in the exhaust gas, and the water after heat exchange can be supplied to the outside, thus realizing the effective use of energy, reducing energy waste, and meeting the requirements of energy conservation and emission reduction.

[0021] 2. This utility model increases the filtration area by setting a serrated metal filter screen and a glass fiber filter screen, as well as a discharge pipe and discharge valve at the bottom of the first filter cylinder and the second filter cylinder, which facilitates the settling and discharge of impurities and achieves efficient filtration of impurities in the exhaust gas, thereby improving the pretreatment effect and reducing the risk of blockage in subsequent equipment.

[0022] 3. This utility model forms a multi-stage synergistic waste gas purification system by sequentially setting up a spray treatment tower, an ultraviolet photo-oxidation reactor with a guide plate, an ultraviolet lamp and an ozone generator, and an activated carbon adsorption tower. This system achieves the gradual removal of various harmful substances in the exhaust gas, resulting in thorough purification and compliance with environmental standards. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is one of the partial structural schematic diagrams of this utility model;

[0025] Figure 3 This is the second partial structural schematic diagram of the present utility model;

[0026] The meanings of the labels in the diagram are as follows:

[0027] 1. Conveying pipeline; 10. Spiral heat exchanger tube; 11. Water inlet pipe; 12. Water outlet pipe; 13. Air inlet hood; 14. Exhaust fan; 15. First filter cartridge; 151. Metal filter screen; 16. Conductor pipe; 17. Second filter cartridge; 171. Glass fiber filter screen; 18. Main pipe; 19. Discharge pipe; 191. Discharge valve;

[0028] 2. Spray treatment tower; 20. Gas pipe; 21. Ultraviolet oxidation reactor; 22. Baffle plate; 23. Ozone generator; 24. Ultraviolet lamp tube; 25. Corrosion-resistant pipe;

[0029] 3. Activated carbon adsorption tower; 30. Cleaning pipe. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0031] Please see Figures 1-3 This utility model provides a technical solution: an integrated device for exhaust gas purification and waste heat recovery, including a conveying pipe 1, a first filter cylinder 15 at the outlet end of the conveying pipe 1, an induced draft fan 14 at the inlet end of the conveying pipe 1, a metal filter screen 151 detachably installed on the inner wall of the first filter cylinder 15, a second filter cylinder 17 on one side of the first filter cylinder 15, a glass fiber filter screen 171 detachably installed on the inner wall of the second filter cylinder 17, and a sealing top cover detachably installed on the top of both the first filter cylinder 15 and the second filter cylinder 17. The first filter cylinder 15 and the second filter cylinder 17 are connected by a guide pipe 16, realizing the preliminary treatment of exhaust gas using the glass fiber filter screen 171 and the metal filter screen 151.

[0032] In this embodiment, the metal filter screen 151 can be made of 304 stainless steel. 304 stainless steel has good corrosion resistance and can resist the erosion of acidic substances contained in the exhaust gas, thus extending the service life of the filter screen. At the same time, it has high mechanical strength and is not easily deformed by airflow impact during the filtration process, which can stably maintain the filtration structure and ensure effective interception of large particulate impurities in the exhaust gas. The glass fiber filter screen 171 can be made of alkali-free glass fiber. Alkali-free glass fiber has excellent chemical stability and is not easily corroded by harmful substances in the exhaust gas, so it can continuously perform its filtration function. Moreover, its fibers are fine and evenly distributed, with a large specific surface area and porosity, which can efficiently adsorb oil mist and fine particulate matter in the exhaust gas, further improving the filtration effect. At the same time, alkali-free glass fiber also has good high temperature resistance and can adapt to the temperature environment of the exhaust gas.

[0033] Specifically, a spray treatment tower 2 is installed on one side of the second filter cylinder 17. The spray treatment tower 2 is equipped with spray heads, and a circulating water tank is located at the bottom of the spray treatment tower 2. The circulating water tank is connected to the spray heads through a pipe, and a circulating pump is installed on the pipe. Treatment liquid can be manually added to the circulating water tank to achieve spray treatment of waste gas. The second filter cylinder 17 and the spray treatment tower 2 are connected through a main pipe 18. An ultraviolet oxidation reactor 21 and an activated carbon adsorption tower 3 for waste gas treatment are installed on one side of the spray treatment tower 2. The spray treatment tower 2 and the ultraviolet oxidation reactor 21, and the ultraviolet oxidation reactor 21 and the activated carbon adsorption tower 3 are connected through pipes. Specifically, the spray treatment tower 2 and the ultraviolet oxidation reactor 21 are connected through a gas pipe 20, and the ultraviolet oxidation reactor 21 and the activated carbon adsorption tower 3 are connected through a corrosion-resistant pipe 25. The activated carbon adsorption tower 3 is filled with activated carbon to achieve normal sequential treatment of waste gas.

[0034] In this embodiment, a spiral heat exchange tube 10 for heat exchange is installed inside the conveying pipe 1. The spiral heat exchange tube 10 is spiral in shape. A water inlet pipe 11 is fixedly installed at the water inlet end of the spiral heat exchange tube 10, which extends out of the conveying pipe 1. A water outlet pipe 12 is fixedly installed at the water outlet end of the spiral heat exchange tube 10, which extends out of the conveying pipe 1. Water can be introduced to perform heat exchange operations, so that the waste heat in the exhaust gas can be effectively recovered. The water after heat exchange can be supplied to the outside for use, thereby improving the energy utilization rate.

[0035] like Figure 1 As shown, a post-treatment pipe 30 is fixedly installed at the outlet end of the activated carbon adsorption tower 3. The post-treatment pipe 30 is used for the discharge of treated exhaust gas.

[0036] like Figure 1 and Figure 2 As shown, an air inlet hood 13 is fixedly installed at the air inlet end of the conveying pipe 1. The air inlet hood 13 is connected to the exhaust gas outlet of the asphalt modification equipment. The induced draft fan 14 is fixedly installed at the end of the air inlet hood 13. The conveying pipe 1 is set at a downward inclination of 45°~60°, so that the induced draft fan 14 can be supported and installed by the air inlet hood 13. At the same time, the inclination of the conveying pipe 1 also facilitates the sedimentation of impurities in the exhaust gas along the conveying pipe 1.

[0037] like Figure 1 and Figure 2 As shown, a discharge pipe 19 is fixedly installed at the bottom of both the first filter cylinder 15 and the second filter cylinder 17. A discharge valve 191 is fixedly installed on the discharge pipe 19 to facilitate the discharge of impurities after filtration, effectively improve the filtration effect of impurities in the exhaust gas, and reduce the risk of blockage in subsequent equipment.

[0038] In addition, the cross-sections of both the metal filter 151 and the glass fiber filter 171 are serrated, which helps to increase the filtration area of ​​the metal filter 151 and the glass fiber filter 171, making the filtration operation smoother.

[0039] It is worth noting that an ozone generator 23 is fixedly installed on the ultraviolet oxidation reactor 21, and ultraviolet lamps 24 are fixedly installed on the inner wall of the ultraviolet oxidation reactor 21. The wavelengths of the ultraviolet lamps 24 are 185nm and 254nm, and the two wavelengths of the ultraviolet lamps 24 are arranged alternately. The gas outlet of the ozone generator 23 is connected to the interior of the ultraviolet oxidation reactor 21. The ozone concentration generated by the ozone generator 23 is 50-100mg / m³, which can fully oxidize and decompose the volatile organic compounds in the exhaust gas, thereby achieving the effect of treating the waste gas.

[0040] It is worth noting that multiple guide plates 22 for guiding the flow of exhaust gas are fixedly installed on the inner wall of the ultraviolet oxidation reactor 21. The guide plates 22 guide the flow of exhaust gas, which can improve the purification effect of the ultraviolet lamp tube 24 and the ozone generator 23 on the exhaust gas.

[0041] Finally, it should be noted that the components involved in this utility model, such as the induced draft fan 14, ozone generator 23, ultraviolet lamp 24, corresponding control system, and external power supply, are all general standard parts or components known to those skilled in the art. Their structures and principles can be obtained by those skilled in the art through technical manuals or conventional experimental methods. In the idle space of this device, all the above-mentioned electrical components, which refer to power elements, electrical components, and the matching controller and power supply, are connected by wires. The specific connection methods should refer to the working principle of this utility model. The electrical connections between each electrical component are completed in the order of operation. The detailed connection methods are all technologies known in the art.

[0042] When the exhaust gas purification and waste heat recovery integrated device of this utility model is in use, the exhaust gas generated by the asphalt modification equipment enters the device through the air inlet hood 13. The induced draft fan 14 is started to send the exhaust gas into the conveying pipe 1. The spiral heat exchange tube 10 in the conveying pipe 1 is introduced with cold water through the water inlet pipe 11 to exchange heat with the high temperature exhaust gas. The hot water is discharged from the water outlet pipe 12 for external use. At the same time, some impurities settle under the inclination of the pipe.

[0043] The exhaust gas enters the first filter cartridge 15, where it passes through the serrated metal filter screen 151 to filter out large particulate impurities. Then it enters the second filter cartridge 17 through the guide pipe 16, where the serrated glass fiber filter screen 171 adsorbs oil mist and fine particles. The filtered impurities can then be discharged through the discharge pipe 19 and the discharge valve 191.

[0044] The pretreated exhaust gas enters the spray treatment tower 2 through the main pipe 18. The circulating pump sprays the liquid medicine in the circulating water tank through the spray head to spray the exhaust gas. Then the exhaust gas enters the ultraviolet oxidation reactor 21 through the gas pipe 20. Under the guidance of the guide plate 22, it flows and reacts with the ozone generated by the ozone generator 23 and the ultraviolet lamp 24 to oxidize and decompose volatile organic compounds.

[0045] Finally, the exhaust gas enters the activated carbon adsorption tower 3 through the anti-corrosion pipe 25 for deep purification, and the treated clean exhaust gas is discharged through the purification pipe 30.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An integrated device for exhaust gas purification and waste heat recovery, comprising a conveying pipeline (1), characterized in that: The air outlet of the conveying pipe (1) is provided with a first filter cylinder (15), and the air inlet of the conveying pipe (1) is provided with an induced draft fan (14). A metal filter screen (151) is provided inside the first filter cylinder (15). A second filter cylinder (17) is provided on one side of the first filter cylinder (15), and a glass fiber filter screen (171) is provided inside the second filter cylinder (17). The first filter cylinder (15) and the second filter cylinder (17) are connected by a guide pipe (16). A spray treatment tower (2) is provided on one side of the second filter cylinder (17). The filter cartridge (17) is connected to the spray treatment tower (2) via a main pipe (18). The spray treatment tower (2) is provided with an ultraviolet oxidation reactor (21) and an activated carbon adsorption tower (3) for waste gas treatment on one side. The spray treatment tower (2) and the ultraviolet oxidation reactor (21), and the ultraviolet oxidation reactor (21) and the activated carbon adsorption tower (3) are connected by pipes. The conveying pipe (1) is provided with a spiral heat exchanger (10) for heat exchange. The outlet end of the activated carbon adsorption tower (3) is fixedly installed with a clean pipe (30).

2. The integrated exhaust gas purification and waste heat recovery device according to claim 1, characterized in that: The spiral heat exchange tube (10) is spiral in shape. The inlet end of the spiral heat exchange tube (10) is fixedly installed with an inlet pipe (11) that extends out of the conveying pipe (1), and the outlet end of the spiral heat exchange tube (10) is fixedly installed with an outlet pipe (12) that extends out of the conveying pipe (1).

3. The integrated exhaust gas purification and waste heat recovery device according to claim 1, characterized in that: An air inlet hood (13) is fixedly installed at the air inlet end of the conveying pipe (1), and the air inlet hood (13) is connected to the exhaust port of the asphalt modification equipment.

4. The integrated exhaust gas purification and waste heat recovery device according to claim 3, characterized in that: The induced draft fan (14) is fixedly installed at the end of the air intake hood (13), and the conveying pipe (1) is set at a downward inclination of 45°~60°.

5. The integrated exhaust gas purification and waste heat recovery device according to claim 1, characterized in that: The bottom ends of the first filter cylinder (15) and the second filter cylinder (17) are both fixedly installed with a discharge pipe (19), and a discharge valve (191) is fixedly installed on the discharge pipe (19).

6. The integrated exhaust gas purification and waste heat recovery device according to claim 1, characterized in that: The cross-sections of the metal filter (151) and the glass fiber filter (171) are both serrated. The spray treatment tower (2) is connected to the ultraviolet oxidation reactor (21) through a gas pipe (20). The ultraviolet oxidation reactor (21) is connected to the activated carbon adsorption tower (3) through a corrosion-resistant pipe (25).

7. The integrated exhaust gas purification and waste heat recovery device according to claim 1, characterized in that: An ozone generator (23) is fixedly installed on the ultraviolet oxidation reactor (21), and an ultraviolet lamp tube (24) is fixedly installed on the inner wall of the ultraviolet oxidation reactor (21).

8. The integrated exhaust gas purification and waste heat recovery device according to claim 7, characterized in that: Multiple guide plates (22) for guiding the flow of waste gas are fixedly installed on the inner wall of the ultraviolet oxidation reactor (21), and the outlet end of the ozone generator (23) is connected to the interior of the ultraviolet oxidation reactor (21).

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