A combustion method for treating VOC waste gas treatment system

Abstract

The application discloses a kind of combustion method processing VOC waste gas treatment system, including waste gas recovery mechanism, filter box and particle recovery mechanism, waste gas recovery mechanism is used to recycle VOC waste gas, waste gas recovery mechanism is sent to filter box in VOC waste gas, filter box is filled with filter particle, filter box is installed with filter group in the end away from waste gas recovery mechanism, filter group includes multiple filters, multiple filters are operated alternately, particle recovery mechanism is used to recycle filter particle in filter box, particle recovery mechanism includes first material pump, the entering end of first material pump is equipped with first particle delivery pipe.Compared with prior art, the combustion method processing VOC waste gas treatment system of the application can adsorb VOC waste gas with more moisture, realize automatic filter particle replacement, and does not need manual intervention during filter particle replacement, ensuring personnel safety.

Description

Technical Field

[0001] The present invention belongs to the technical field of waste gas treatment systems, and in particular relates to a system for treating VOC waste gas using a combustion method. Background Art

[0002] Among current VOC (volatile organic compound) waste gas treatment technologies, combustion is highly favored due to its high efficiency. By burning waste gas at high temperatures, harmful substances can be converted into harmless carbon dioxide and water, significantly reducing air pollution.

[0003] However, this method presents some significant challenges when treating large-scale waste gas. First, when the filter layer is working in a high-flow environment, the waste gas needs to pass through the filter layer to remove VOCs. During this process, the filter layer will gradually become saturated and needs to be desorbed regularly to release the adsorbed VOCs and remove them through combustion. In particular, in an environment where the waste gas contains a large amount of moisture, the filter layer will adsorb moisture in the waste gas, resulting in a decrease in the filter layer's adsorption of VOCs, and the filter layer will become saturated faster. Frequent adsorption and desorption operations will cause the filter layer's adsorption capacity to gradually decrease, thereby affecting the efficiency of the entire waste gas treatment system. After the filter layer adsorbs moisture, even after the moisture is dried, it will affect the adsorption capacity of the filter layer, and even cause the generation and adsorption of harmful substances during the drying process. In addition, since the filter layer needs to be replaced regularly, this increases the physical burden on the staff, and during the replacement process, VOC substances that are not completely desorbed may remain in the filter layer, which may pose a potential health risk to the human body.

[0004] The information disclosed in this background technology section is only intended to enhance understanding of the overall background of the invention and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the Invention

[0005] The object of the present invention is to provide a VOC waste gas treatment system using a combustion method, which can solve the technical problems raised in the above background technology.

[0006] In order to achieve the above object, a technical solution provided by a specific embodiment of the present invention is as follows:

[0007] A VOC waste gas treatment system using a combustion method includes a waste gas recovery mechanism, a filter box, and a particle recovery mechanism. The waste gas recovery mechanism is used to recover VOC waste gas. The waste gas recovery mechanism transports the VOC waste gas to the filter box. The filter box is filled with filter particles. A filter group is installed at one end of the filter box away from the waste gas recovery mechanism. The filter group includes multiple filters, and the multiple filters operate alternately. The particle recovery mechanism is used to recover the filter particles in the filter box. The particle recovery mechanism includes a first material pump. A first particle delivery pipe is installed at the inlet end of the first material pump, and a second particle delivery pipe is installed at the output end of the first material pump. The first material pump is communicated with the filter box. A first shell is installed at the end of the second particle delivery pipe away from the first material pump. A desorption auxiliary mechanism is installed in the first shell. A combustion chamber is formed between the desorption auxiliary mechanism and the first shell. A burner matching the combustion chamber is installed on the first shell. A particle delivery mechanism for delivering particles in the first shell back to the filter box is installed on the first shell.

[0008] In one or more embodiments of the present invention, the desorption auxiliary mechanism includes a filter body, which is installed inside a first shell. The first shell forms a material chamber and a filter chamber with the desorption auxiliary mechanism from top to bottom. The combustion chamber is located at the end of the filter chamber away from the material chamber. The first shell is located at the lower end of the combustion chamber to form a storage chamber. A material receiving hopper matching the storage chamber is installed in the first shell, and a material valve is fixedly connected to the lower end of the material receiving hopper. A hollow tube is fixedly connected to the middle part of the filter body, and a plurality of air inlet holes are provided on the hollow tube. The upper end of the first shell is fixedly connected to a motor matching the hollow tube, and a circulation mechanism for circulating the gas in the first shell is installed on the hollow tube.

[0009] In one or more embodiments of the present invention, the circulation mechanism includes a rotary joint installed on a hollow tube, a first connecting pipe is installed on the rotary joint, a third pump body is installed on the end of the first connecting pipe away from the rotary joint, the output end of the third pump body is fixedly connected to the third connecting pipe, a fourth connecting pipe is installed between the third connecting pipe and the receiving hopper, the receiving hopper is hollow, and a plurality of through holes are opened on the receiving hopper.

[0010] In one or more embodiments of the present invention, the lower end of the first shell is fixedly connected to the second shell, a heat exchange chamber is opened in the second shell, a second connecting tube matching the heat exchange chamber is installed on the third connecting tube, and a sixth connecting tube is installed between the heat exchange chamber and the fourth connecting tube.

[0011] In one or more embodiments of the present invention, a particle recovery mechanism is installed on the second shell, and the particle recovery mechanism includes an air inlet plate and a second air outlet plate, and the air inlet plate and the second air outlet plate are relatively arranged inside the second shell. The particle recovery mechanism also includes a storage box, a fifth connecting pipe is installed between the air inlet plate and the storage box, a seventh connecting pipe is installed between the second air outlet plate and the storage box, and a fourth pump body is provided on the seventh connecting pipe.

[0012] In one or more embodiments of the present invention, a first desorption medium delivery pipe matching the filter group is installed on the fourth pump body, and a second desorption medium delivery pipe matching the filter group is installed on the sixth connecting pipe.

[0013] In one or more embodiments of the present invention, a liquid infusion tube is installed on the second shell, and a catalyst injection mechanism is provided at one end of the liquid infusion tube away from the second shell, and the catalyst injection mechanism is used to add catalyst and catalyst into the second shell.

[0014] In one or more embodiments of the present invention, the particle conveying mechanism includes a second material pump, the second material pump is equipped with a third particle conveying pipe communicating with the first shell, and the second material pump is equipped with a fourth particle conveying pipe communicating with the filter box.

[0015] In one or more embodiments of the present invention, the filter particles are ceramic particles and zeolite particles, or a combination of both.

[0016] In one or more embodiments of the present invention, the filter particles are loaded with a catalyst.

[0017] Compared with the existing technology, the combustion method VOC waste gas treatment system of the present invention can adsorb VOC waste gas with a lot of water, realize automatic filter particle replacement, and no manual intervention is required during the replacement of filter particles, thereby ensuring personnel safety. The filter particles can be recycled to reduce the pressure on the filter group. The filter particles can also assist in catalyzing VOC molecules, which is beneficial to improving the treatment efficiency of VOC waste gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1A schematic diagram of the structure of a VOC waste gas treatment system using a combustion method according to one embodiment of the present invention Figure 1 ;

[0020] Figure 2 for Figure 1 Schematic diagram of the structure at A in the middle;

[0021] Figure 3 A schematic diagram of the structure of a VOC waste gas treatment system using a combustion method according to one embodiment of the present invention Figure 2 ;

[0022] Figure 4 for Figure 3 Schematic diagram of the structure at B in the middle;

[0023] Figure 5 This is a partial structural diagram of a system for treating VOC waste gas by combustion method according to one embodiment of the present invention;

[0024] Figure 6 A cross-sectional view of a filter box according to an embodiment of the present invention;

[0025] Figure 7 is a cross-sectional view of a first housing according to an embodiment of the present invention;

[0026] Figure 8 Schematic diagram of the structure of a hollow tube in one embodiment of the present invention.

[0027] Description of main reference numerals:

[0028] 1. Waste gas recovery mechanism; 2. First pump body; 3. First waste gas delivery pipe; 4. Second waste gas delivery pipe; 401. First air outlet plate; 5. Filter box; 6. Filter particles; 7. Discharge port; 8. Filter screen; 9. First filtered gas delivery pipe; 10. Second filtered gas delivery pipe; 1001. First connection end; 1002. Second connection end; 11. Filter group; 1101. First filter; 1102. Second filter; 12. Third filtered gas delivery pipe; 1201. Third connection end; 120 2. Fourth connecting end; 13. Fourth filtered gas delivery pipe; 14. Second pump body; 15. Filtered gas output pipe; 16. Particle recovery mechanism; 17. First material pump; 18. First particle delivery pipe; 19. Second particle delivery pipe; 20. First housing; 2001. Material chamber; 2002. Filter chamber; 2003. Combustion chamber; 2004. Storage chamber; 21. Burner; 22. Desorption auxiliary mechanism; 23. Filter body; 24. Hollow tube; 2401. Air inlet; 25. Motor; 26 , bracket; 27, circulation mechanism; 28, rotary joint; 29, first connecting pipe; 2901, first valve; 30, third pump body; 31, second connecting pipe; 32, third connecting pipe; 3201, second valve; 3202, third valve; 33, fourth connecting pipe; 34, receiving hopper; 3401, through hole; 35, material valve; 36, sixth connecting pipe; 37, particle recovery mechanism; 38, storage box; 39, fifth connecting pipe; 40, air inlet plate; 41, seventh connecting pipe; 42, Second air outlet plate; 43. Fourth pump body; 44. Second shell; 4401. Heat exchange chamber; 45. Eighth connecting pipe; 4501. Fourth valve; 46. Ninth connecting pipe; 4601. Fifth valve; 47. Tenth connecting pipe; 48. Eleventh connecting pipe; 49. Twelfth connecting pipe; 50. Infusion pipe; 51. Particle conveying mechanism; 52. Second material pump; 53. Third particle conveying pipe; 54. Fourth particle conveying pipe; 55. Exhaust pipe; 56. Sixth valve; 57. Thirteenth connecting pipe. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0030] like Figures 1 to 6As shown, a combustion-based VOC waste gas treatment system according to one embodiment of the present invention includes a waste gas recovery mechanism 1 and a filter box 5. The waste gas recovery mechanism 1 is used to recover VOC waste gas and convey the recovered VOC waste gas to the filter box 5. The filter box 5 is filled with filter particles 6, which adsorb VOC molecules according to the principle of like dissolves like. The filter particles 6 are generally ceramic particles or zeolite particles, or a combination of both. The filter particles 6 have tiny pores that match the VOCs. The tiny pores are uniform, forming a large number of adsorption sites, allowing the VOCs to fully contact the filter particles 6 and increasing the adsorption efficiency of the filter particles 6.

[0031] like Figures 1 to 6 As shown, a filter group 11 is mounted on the end of the filter box 5 away from the exhaust gas recovery mechanism 1. The filter box 5 and the filter group 11 are interconnected, meaning that the exhaust gas filtered by the filter box 5 enters the filter group 11. The filter group 11 is composed of multiple filters, which operate alternately to prevent saturation of all filters and prevent the VOC exhaust gas treatment system from stalling due to filter saturation. After passing through the filter group 11, the VOC exhaust gas can be discharged through the second pump body 14.

[0032] Specifically, such as Figures 1 to 6 As shown, the exhaust gas recovery mechanism 1 includes a first pump body 2, the input end of the first pump body 2 is fixedly connected to a first exhaust gas delivery pipe 3, the first exhaust gas delivery pipe 3 is capable of collecting exhaust gas from several areas, and the output end of the first pump body 2 is fixedly connected to a second exhaust gas delivery pipe 4, the end of the second exhaust gas delivery pipe 4 away from the first pump body 2 is located inside a filter box 5, and a first air outlet plate 401 that matches the second exhaust gas delivery pipe 4 is installed inside the filter box 5. Exhaust gas can be collected by the first exhaust gas delivery pipe 3, and the first air outlet plate 401 evenly outputs the exhaust gas to the interior of the filter box 5, so that the exhaust gas can fully contact the filter particles 6.

[0033] like Figures 1 to 6 As shown, the lower end of the filter box 5 is fixedly connected to a discharge port 7. A filter screen 8 matching the discharge port 7 is installed inside the filter box 5. The filter screen 8 filters the filter particles 6 and prevents the filter particles 6 from being discharged together with the gas discharged from the discharge port 7. A first filtered gas delivery pipe 9 is installed at the discharge port 7. A second filtered gas delivery pipe 10 is installed at the end of the first filtered gas delivery pipe 9 away from the discharge port 7. The second filtered gas delivery pipe 10 is connected to a filter group 11.

[0034] like Figures 1 to 6As shown, in this embodiment, the filter group 11 is composed of two filters, namely a first filter 1101 and a second filter 1102. The second filtered gas delivery pipe 10 has a first connection end 1001 and a second connection end 1002. The first connection end 1001 and the second connection end 1002 are respectively connected to the first filter 1101 and the second filter 1102, and a valve matching the second connection end 1002 and the first connection end 1001 is installed on the second filtered gas delivery pipe 10. The valve is used to realize the alternating operation of the first filter 1101 and the second filter 1102, that is, the valve is used to control whether the exhaust gas after passing through the filter box 5 enters the first filter 1101 or the second filter 1102.

[0035] like Figures 1 to 4 As shown, a third filtered air delivery pipe 12 is installed between the first filter 1101 and the second filter 1102. The third filtered air delivery pipe 12 has a third connection end 1201 and a fourth connection end 1202, each of which communicates with the end of the filter group 11 away from the second filtered air delivery pipe 10. Similarly, valves are installed on both the third connection end 1201 and the fourth connection end 1202, which also enable alternating operation of the first filter 1101 and the second filter 1102. A fourth filtered air delivery pipe 13 is installed on the third filtered air delivery pipe 12. A second pump body 14 is installed on the end of the fourth filtered air delivery pipe 13 away from the filter group 11. The fourth filtered air delivery pipe 13 is connected to the input end of the second pump body 14. A filtered air output pipe 15 is fixedly connected to the output end of the second pump body 14. The filtered air output pipe 15 is used to discharge the exhaust gas that has passed through the filter box 5 and the filter group 11. At this time, after the exhaust gas passes through the filter box 5 and the filter group 11, the VOC molecules in the exhaust gas have been completely adsorbed and meet the emission standards.

[0036] After a period of adsorption, the VOC molecules in the filter particles 6 need to be burned. Figures 1 to 4 As shown, the VOC waste gas treatment system further includes a combustion mechanism, which is used to burn the filter particles 6 to dry the moisture attached to the filter particles 6 and decompose the VOC molecules, thereby restoring the adsorption performance of the filter particles 6 through the combustion mechanism.

[0037] like Figures 1 to 4As shown, a particle recovery mechanism 16 is installed between the combustion mechanism and the filter box 5. The particle recovery mechanism 16 transports the filtered particles 6 in the filter box 5 to the combustion mechanism. The particle recovery mechanism 16 includes a first material pump 17. The input end of the first material pump 17 is fixedly connected to a first particle delivery pipe 18 that communicates with the filter box 5. The output end of the first material pump 17 is fixedly connected to a second particle delivery pipe 19 that communicates with the combustion mechanism.

[0038] like Figures 1 to 7 As shown, the combustion mechanism includes a first shell 20, a second particle transport tube 19 is installed at the upper end of the first shell 20, and a plurality of burners 21 are fixedly connected to the inner wall of the first shell 20. The burners 21 spray flames and gas. The burners 21 spray gas to increase the flammability of VOC molecules in the first shell 20.

[0039] like Figures 1 to 7 As shown, a desorption assist mechanism 22 is installed inside the first shell 20. The desorption assist mechanism 22 can assist in the combustion of VOC molecules, that is, it can assist in the combustion of filtered particles 6. The desorption assist mechanism 22 includes a filter body 23, which is located inside the first shell 20. Between the filter body 23 and the first shell 20, a material chamber 2001, a filter chamber 2002, a combustion chamber 2003, and a storage chamber 2004 are formed in sequence from top to bottom. The second particle delivery tube 19 is in communication with the material chamber 2001, that is, the filtered particles 6 delivered by the second particle delivery tube 19 are first located in the material chamber 2001, the filter chamber 2002 can only pass one filtered particle 6, and the combustion chamber 2003 has a larger space than the filter chamber 2002.

[0040] Specifically, the material chamber 2001 completes the temporary storage of the filter particles 6, the filter particles 6 are diverted by the filter chamber 2002, and the filter particles 6 can fall evenly downward. The burner 21 is installed on the inner wall of the combustion chamber 2003, and the single-particle filter particles 6 are burned by the flame ejected by the burner 21, so that the filter particles 6 can be dried. The VOC molecules in the filter particles 6 are fully burned by the flame, so that the VOC molecules are decomposed into water and carbon dioxide.

[0041] In order to further improve the combustion efficiency of the filter particles 6 and enable the VOC molecules located in the filter particles 6 to be fully burned, the filter particles 6 are also loaded with a catalyst. The catalyst can improve the combustion efficiency and catalyze the oxidation of the VOC molecules at the same time, while simply achieving the combustion and decomposition of the VOC molecules. The catalyst can specifically be a transition metal oxide such as titanium dioxide and manganese oxide. That is, the VOC molecules can be oxidized after being adsorbed on the filter particles 6. During combustion, the temperature required for combustion can be greatly reduced, which is beneficial to energy saving. And it can have a higher removal efficiency. Due to the presence of the catalyst, even if the filter particles 6 are saturated with adsorption in the filter box 5, they can continue to convert VOCs volatile organic compounds into harmless substances, avoiding secondary pollution caused by the release of VOCs.

[0042] Preferably, the gas discharged from the combustion mechanism has a certain temperature, which allows the combustion mechanism to exchange heat with the VOC waste gas in the first waste gas delivery pipe 3, thereby increasing the heat of the VOC waste gas entering the filter box 5 and accelerating the oxidation of VOC molecules. At the same time, it can also help reduce heat loss and save the cost of using the VOC waste gas treatment system.

[0043] like Figures 1 to 8 As shown, in order to ensure that the filter particles 6 and the VOC molecules in the filter particles 6 can be fully burned in the combustion chamber 2003, the filter body 23 is a zeolite adsorbent with a smaller and more uniform pore size than the filter particles 6. A hollow tube 24 is fixedly connected to the middle of the filter body 23, the upper end of the hollow tube 24 protrudes from the first pump body 2, and a motor 25 that matches the hollow tube 24 is installed on the first pump body 2. A bracket 26 for fixing the motor 25 is installed between the first shell 20 and the motor 25. A circulation mechanism 27 is installed on the hollow tube 24, which can circulate the gas in the first shell 20 so that the VOC molecules can be fully burned.

[0044] Specifically, such as Figures 1 to 8 As shown, the hollow tube 24 is provided with a plurality of air inlet holes 2401, evenly distributed from top to bottom. The circulation mechanism 27 generates a negative pressure at the air inlet holes 2401, thereby generating a negative pressure around the filter body 23. The filter body 23 has a certain adsorption effect on the filter particles 6, thereby slowing the descent of the filter particles 6. Furthermore, the filter body 23 rotates. When the filter particles 6 come into contact with the filter body 23, they are centrifugally moved toward the end away from the filter body 23. This allows the filter particles 6 to move back and forth within the combustion chamber 2003 and to collide with each other multiple times within the combustion chamber 2003. These collisions between the filter particles 6 facilitate the desorption of VOC molecules within the filter particles 6. Specifically, when the filter particles 6 are in the combustion chamber 2003, they are fully decomposed through combustion. Simultaneously, the collisions desorb the VOC molecules, allowing combustion to proceed, thus preventing VOC molecules from remaining within the filter particles 6.

[0045] As VOC molecules pass through filter 23, they are adsorbed on its surface. Burner 21 continuously burns filter 23, completely decomposing the VOC molecules adhering to its surface. The pore size of filter 23 decreases from the outside to the inside, maximizing the adsorption of VOC molecules desorbed from combustion chamber 2003 onto the surface of filter 23, thereby improving VOC decomposition efficiency.

[0046] like Figures 1 to 8 As shown, due to gravity and the fact that the negative pressure generated by the air inlet 2401 is uneven, the filter particles 6 are able to move downward in the combustion chamber 2003 .

[0047] like Figures 1 to 8 As shown, the circulation mechanism 27 includes a rotary joint 28, on which a first connecting pipe 29 is installed, and on which a first valve 2901 is provided. The first connecting pipe 29 is connected to the hollow pipe 24 through the rotary joint 28. Even if the hollow pipe 24 is rotating, it does not affect the passage between the first connecting pipe 29 and the hollow pipe 24.

[0048] like Figures 1 to 8 As shown, a receiving hopper 34 matching the storage chamber 2004 is installed inside the first shell 20. When the filter particles 6 pass through the combustion chamber 2003 and fall into the storage chamber 2004, the filter particles 6 will fall on the receiving hopper 34, and the receiving hopper 34 will receive the filter particles 6.

[0049] like Figures 1 to 8 As shown, a third pump body 30 is installed at the end of the first connecting pipe 29 away from the rotary joint 28. The input end of the third pump body 30 is connected to the first connecting pipe 29, and the output end of the third pump body 30 is fixedly connected to the third connecting pipe 32. A second valve 3201 and a third valve 3202 are installed on the third connecting pipe 32. The second valve 3201 and the third valve 3202 are respectively located at the two ends of the third connecting pipe 32. The end of the third connecting pipe 32 away from the third pump body 30 is connected to the hopper 34. The hopper 34 is hollow and has a plurality of evenly distributed through holes 3401. The gas in the first connecting pipe 29 is ejected upward from the through holes 3401 and then recovered through the filter body 23 to achieve gas circulation.

[0050] like Figures 1 to 8 As shown, the gas can blow upward the filter particles 6 located on the receiving hopper 34 during the circulation process, thereby achieving secondary desorption of the filter particles 6 after combustion and avoiding the residue of VOC molecules.

[0051] Generally, a gas detector is installed within the first housing 20 to determine the VOC content within the first housing 20. Once the gas composition within the first housing 20 is acceptable for discharge, the gas within the first housing 20 is discharged through the exhaust pipe 55 on the first connecting pipe 29. A sixth valve 56 is installed on the exhaust pipe 55. The sixth valve 56 is normally closed and opens only when the gas is being discharged from the exhaust pipe 55. The opening and closing of the sixth valve 56 is determined by the first housing 20.

[0052] In order to restore the performance of the filter particles 6 as much as possible, Figures 1 to 7 As shown, the lower end of the first housing 20 is fixedly connected to the second housing 44. The hopper 34 is equipped with a material valve 35 that matches the air inlet plate 40. When the material valve 35 is opened, the filter particles 6 in the hopper 34 fall into the second housing 44. The interior of the second housing 44 is provided with a particle recovery mechanism 37. The particle recovery mechanism 37 circulates nitrogen gas into the interior of the second housing 44 to restore the adsorption performance of the filter particles 6.

[0053] Specifically, when filter particles 6 are being burned in combustion chamber 2003, they are at high temperatures. While their pore structure remains open, their surface active sites may be temporarily active due to thermal vibrations. By circulating nitrogen, the temperature of filter particles 6 is lowered, causing the material lattice and pore structure to shrink to their initial state. This reduces the energy of the surface active sites, allowing filter particles 6 to regain stable adsorption capacity and prepare for the next adsorption. Furthermore, circulating nitrogen minimizes the re-adsorption of other adsorbates onto the particle surface during the cooling process, reducing the possibility of slight lattice distortion of the ceramic material caused by the high temperature of filter particles 6. This ensures the adsorption accuracy of filter particles 6 and helps protect the stability of the pore structure and active sites.

[0054] Furthermore, since VOC molecules produce carbon dioxide and water vapor after decomposition, circulating nitrogen can also reduce the amount of desorbed products that remain in the form of vapor within pores or between particles. When nitrogen is introduced at room temperature, the shear force generated by its flow can dislodge these residual vapors or tiny droplets, preventing them from condensing and clogging pores or re-adsorbing. The particle recovery mechanism 37 creates a pure, inert environment within the second housing 44, ensuring that the pores of the filter particles 6 are completely empty, restoring their initial adsorption activity.

[0055] Specifically, particle recovery mechanism 37 includes a storage box 38, which stores nitrogen. A fifth connecting pipe 39 and a seventh connecting pipe 41 are mounted on storage box 38. An air inlet plate 40, which mates with a second housing 44, is mounted on the end of fifth connecting pipe 39 facing away from storage box 38. A second air outlet plate 42, which mates with second housing 44, is mounted on the end of seventh connecting pipe 41 facing away from storage box 38. Air inlet plate 40 and second air outlet plate 42 are positioned opposite each other. Nitrogen is ejected from seventh connecting pipe 41 and second air outlet plate 42, then passes through air inlet plate 40 and fifth connecting pipe 39 into storage box 38, thereby circulating nitrogen. A fourth pump 43 is mounted on seventh connecting pipe 41 to provide power for the nitrogen circulation.

[0056] Preferably, since the filter particles 6 may carry water vapor, in order to prevent the water vapor from adhering to the filter particles 6 during the circulation process with the nitrogen and affecting the adsorption performance of the filter particles 6, a filtering mechanism can be provided on the fifth connecting pipe 39 to filter the moisture in the nitrogen during the nitrogen circulation process, so as to ensure that the nitrogen is as dry as possible and the purity of the nitrogen is guaranteed.

[0057] like Figures 1 to 4 As shown, the filtered particles 6 in the second housing 44 that have recovered good performance can be transported back to the filter box 5 through the particle conveying mechanism 51. The particle conveying mechanism 51 includes a second material pump 52. A third particle conveying pipe 53 is installed at the input end of the second material pump 52. The third particle conveying pipe 53 is in communication with the second housing 44. A fourth particle conveying pipe 54 is installed at the output end of the second material pump 52. One end of the fourth particle conveying pipe 54 is located above the filter box 5. The second material pump 52, the third particle conveying pipe 53, and the fourth particle conveying pipe 54 cooperate to convey the filtered particles 6 in the second housing 44 to the filter box 5.

[0058] In other words, the filter particles 6 adsorbed with VOC molecules within the filter box 5 are transported to the first housing 20. The particle transport mechanism 51 then refills the filter particles 6 within the second housing 44 into the filter box 5, thereby automatically replacing the filter particles 6. This process eliminates the need for human intervention and minimizes the risk of VOC molecules causing harm to the human body. Due to the presence of the filter box 5, the filtration pressure of the filter group 11 is reduced, significantly reducing the frequency of filter group 11 replacements and the operator's need to change the filter group 11, thereby minimizing the risk of VOC molecules causing harm to the human body.

[0059] like Figures 1 to 7As shown, a liquid infusion tube 50 is also mounted on the second housing 44. A liquid infusion mechanism is provided at one end of the liquid infusion tube 50 away from the second housing 44. The liquid infusion mechanism is capable of delivering liquid into and extracting liquid from the second housing 44. Generally, after nitrogen circulation is completed, it can be delivered into the second housing 44 via the liquid infusion tube 50 and the liquid infusion mechanism. Generally, the liquid delivered into the second housing 44 by the liquid infusion mechanism is a catalyst, which is used to immerse the desorbed filter particles 6 in the catalyst, thereby loading the surface of the filter particles 6 with the catalyst. This allows the filter particles 6 to better treat VOC exhaust gas in the filter box 5.

[0060] like Figures 1 to 7 As shown, in order to better load the catalyst on the surface of the filter particles 6, a heat exchange chamber 4401 is defined within the second shell 44. A second connecting tube 31 matching the heat exchange chamber 4401 is mounted on the third connecting tube 32, the second connecting tube 31 communicating with the heat exchange chamber 4401. A sixth connecting tube 36 matching the heat exchange chamber 4401 is mounted on the second shell 44, the other end of the sixth connecting tube 36 communicating with the fourth connecting tube 33. In other words, while circulating the gas within the first shell 20, the circulation mechanism 27 can transfer some heat to the second shell 44, raising the temperature of the second shell 44. After loading the catalyst on the surface of the filter particles 6, the filter particles 6 can be dried to dilute the catalyst's active components, reduce the loading per unit area, and ensure that the catalyst precursor is fixed on the surface and within the pores of the ceramic support, forming a uniform initial coating. This lays the foundation for the subsequent adsorption and catalysis of VOC molecules by the filter particles 6.

[0061] Preferably, in order to improve the drying efficiency of the filter particles 6 in the second housing 44, a drying mechanism can also be provided inside the second housing 44 to uniformly and efficiently dry the filter particles 6. Of course, during the drying process, the catalyst volatilizes, and the volatilized catalyst can be discharged through the fresh air mechanism.

[0062] like Figures 1 to 4 As shown, the filter body 23 is generally made of the same material as the filter particles 6 and requires nitrogen to restore its adsorption properties during use. Therefore, a thirteenth connecting pipe 57 is installed between the second connecting pipe 31 and the storage box 38. When nitrogen is required to flow into the filter body 23, the nitrogen flows into the combustion chamber 2003 through the thirteenth connecting pipe 57, the second connecting pipe 31, the heat exchange chamber 4401, the sixth connecting pipe 36, the fourth connecting pipe 33, and the hopper 34, ensuring sufficient contact between the nitrogen and the filter body 23.

[0063] In this embodiment, since there are two filtering mechanisms, the filter box 5 and the filter group 11, the filter group 11 uses activated carbon filtration to filter out molecules such as ozone that cannot be filtered out by the filter box 5, thereby achieving odor filtration of VOC exhaust gas. After a period of use, the filter group 11 is saturated with adsorption and needs to be desorbed. Figures 1 to 4 As shown, the eighth connecting pipe 45 and the ninth connecting pipe 46 are installed on the seventh connecting pipe 41. The eighth connecting pipe 45 and the ninth connecting pipe 46 correspond to the second filter 1102 and the first filter 1101 respectively. The fourth valve 4501 and the fifth valve 4601 are installed on the eighth connecting pipe 45 to realize the passage control of the eighth connecting pipe 45 and the ninth connecting pipe 46.

[0064] In other words, the eighth and ninth connecting pipes 45 and 46 can transport nitrogen from the storage tank 38 to the first and second filters 1101 and 1102, desorbing the VOCs from the filter group 11 by backflushing the nitrogen. The tenth and eleventh connecting pipes 47 and 48 are mounted on the first and second connecting ends 1001 and 1002, respectively. A twelfth connecting pipe 49, which matches the tenth and eleventh connecting pipes 47 and 48, is mounted on the second filtered gas delivery pipe 10. Valves are installed on the eleventh and tenth connecting pipes 48 and 47, respectively. The fifth connecting pipe 39 is interconnected with the sixth connecting pipe 36, meaning that nitrogen is transported back into the first housing 20 through the sixth connecting pipe 36. Desorption from the filter group 11 is achieved through combustion and recycling of the nitrogen, burning VOC molecules remaining in the filter group 11. Furthermore, the heat of the nitrogen entering the filter group 11 gradually increases, further facilitating desorption from the filter group 11.

[0065] After the VOC molecules are completely burned, an exhaust pipe 55 is provided on the first connecting pipe 29. A sixth valve 56 is provided on the exhaust pipe 55. The exhaust pipe 55 and the sixth valve 56 cooperate to discharge the fully burned exhaust gas. However, when the burned VOC exhaust gas is discharged, it can exchange heat with the first exhaust gas delivery pipe 3 to reduce the temperature of the exhaust gas from the exhaust pipe 55 and increase the temperature of the VOC exhaust gas within the first exhaust gas delivery pipe 3. The high-temperature VOC molecules are more likely to undergo a catalytic reaction with the catalytic layer carried on the filter particles 6.

[0066] When the VOC waste gas treatment system of the present invention is used, waste gas recovery mechanism 1 first collects VOC waste gas from the environment. The VOC waste gas first enters filter box 5, where filter particles 6 within filter box 5 adsorb VOC molecules. After passing through filter particles 6, the VOC waste gas enters filter group 11, where filter group 11 performs a secondary filtration on the VOC waste gas. After passing through filter group 11, the VOC waste gas can be discharged. The VOC molecules are adsorbed by filter particles 6 and the activated carbon within filter group 11.

[0067] After the filtered particles 6 have been used for a period of time, the filtered particles 6 in the filter box 5 will be extracted by the particle recovery mechanism 16, and new filtered particles 6 will be added to the filter box 5 through the particle conveying mechanism 51. The extracted filtered particles 6 enter the first shell 20, and the filtered particles 6 are first filtered by the filter cavity 2002. Only single filtered particles 6 can pass through the filter cavity 2002 and enter the combustion cavity 2003. The filtered particles 6 can be burned by the burner 21 in the combustion cavity 2003, so that the VOC molecules are desorbed and decomposed from the filtered particles 6. Specifically, the filter body 23 has an adsorption force on the filtered particles 6 through the cooperation of the circulation mechanism 27, which allows the filtered particles 6 to fit the filter body 23. The filter body 23 is also rotating. When the filtered particles 6 fit the filter body 23, they will contact the inner wall of the combustion cavity 2003 due to centrifugal force. This is repeated, so that the filtered particles 6 will collide in the combustion cavity 2003, which helps to desorb the VOC molecules.

[0068] The completely burned filter particles 6 will eventually fall onto the receiving hopper 34. The filter particles 6 on the receiving hopper 34 can be brought into the second shell 44 through the material valve 35. The filter particles 6 are treated in the second shell 44 through nitrogen circulation, catalyst impregnation, and drying steps to restore the adsorption performance of the filter particles 6 as much as possible and to load the catalyst, so that the filter particles 6 can catalyze the VOC molecules in the filter box 5. After entering the combustion chamber 2003, the VOC molecules can be decomposed even at a low combustion temperature, which is beneficial to saving the use cost of the exhaust gas treatment system.

[0069] The present invention can adsorb VOC waste gas containing a high amount of water, enabling automated replacement of filter particles 6. This process eliminates the need for manual intervention, ensuring personnel safety. Furthermore, the filter particles 6 can be recycled, reducing pressure on the filter group 11. The filter particles 6 can also assist in catalyzing VOC molecules, thereby improving VOC waste gas treatment efficiency.

[0070] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0071] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A VOC waste gas treatment system using a combustion method, characterized in that: include: An exhaust gas recovery mechanism, wherein the exhaust gas recovery mechanism is used to recover VOC exhaust gas; A filter box, wherein the exhaust gas recovery mechanism transports the VOC exhaust gas to the filter box, the filter box is filled with filter particles, and a filter group is installed at one end of the filter box away from the exhaust gas recovery mechanism, the filter group includes multiple filters, and the multiple filters operate alternately; a particle recovery mechanism for recovering filtered particles in the filter box, the particle recovery mechanism comprising a first material pump, a first particle delivery pipe being mounted on an inlet end of the first material pump, a second particle delivery pipe being mounted on an outlet end of the first material pump, the first material pump being in communication with the filter box, and a first housing being mounted on an end of the second particle delivery pipe remote from the first material pump; A desorption auxiliary mechanism is installed in the first shell, a combustion chamber is formed between the desorption auxiliary mechanism and the first shell, and a burner matching the combustion chamber is installed on the first shell; The first housing is provided with a particle conveying mechanism for conveying particles in the first housing back into the filter box; The desorption auxiliary mechanism includes a filter body, which is installed inside the first shell. The first shell forms a material cavity and a filter cavity between the desorption auxiliary mechanism from top to bottom. The combustion cavity is located at the end of the filter cavity away from the material cavity. The first shell is located at the lower end of the combustion chamber to form a storage chamber, and a material receiving hopper matching the storage chamber is installed in the first shell, and the lower end of the material receiving hopper is fixedly connected to a material valve; A hollow tube is fixedly connected to the middle of the filter body, and a plurality of air inlet holes are opened on the hollow tube. A motor matching the hollow tube is fixedly connected to the upper end of the first shell, and a circulation mechanism for circulating the gas in the first shell is installed on the hollow tube.

2. A VOC waste gas treatment system using a combustion method according to claim 1, characterized in that: The circulation mechanism includes a rotary joint installed on a hollow tube, a first connecting pipe is installed on the rotary joint, a third pump body is installed on the end of the first connecting pipe away from the rotary joint, the output end of the third pump body is fixedly connected to the third connecting pipe, and a fourth connecting pipe is installed between the third connecting pipe and the receiving hopper; The receiving hopper is hollow and has a plurality of through holes.

3. A VOC waste gas treatment system using a combustion method according to claim 2, characterized in that: The lower end of the first shell is fixedly connected to the second shell, a heat exchange cavity is opened in the second shell, a second connecting tube matching the heat exchange cavity is installed on the third connecting tube, and a sixth connecting tube is installed between the heat exchange cavity and the fourth connecting tube.

4. A VOC waste gas treatment system using a combustion method according to claim 3, characterized in that: The second housing is provided with a particle recovery mechanism, the particle recovery mechanism comprising an air inlet plate and a second air outlet plate, the air inlet plate and the second air outlet plate being arranged opposite to each other inside the second housing; The particle recovery mechanism further includes a storage box, a fifth connecting pipe is installed between the air inlet plate and the storage box, a seventh connecting pipe is installed between the second air outlet plate and the storage box, and a fourth pump body is provided on the seventh connecting pipe.

5. A VOC waste gas treatment system using a combustion method according to claim 4, characterized in that: The fourth pump body is provided with a first desorption medium delivery pipe matching the filter group; The sixth connecting pipe is provided with a second desorption medium delivery pipe matching the filter group.

6. The VOC waste gas treatment system using combustion method according to claim 5 is characterized in that: A liquid infusion tube is installed on the second shell. A catalyst injection mechanism is provided at one end of the liquid infusion tube away from the second shell. The catalyst injection mechanism is used to add catalyst and catalyst into the second shell.

7. A VOC waste gas treatment system using a combustion method according to any one of claims 1 to 6, characterized in that: The particle conveying mechanism includes a second material pump, a third particle conveying pipe communicating with the first shell is installed on the second material pump, and a fourth particle conveying pipe communicating with the filter box is installed on the second material pump.

8. The VOC waste gas treatment system using combustion method according to claim 1 is characterized in that: The filter particles are ceramic particles and zeolite particles, or a combination of both.

9. The VOC waste gas treatment system using combustion method according to claim 8, characterized in that: The filter particles are loaded with a catalyst.

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